IB/hfi1: add driver files
Signed-off-by: Andrew Friedley <andrew.friedley@intel.com>
Signed-off-by: Arthur Kepner <arthur.kepner@intel.com>
Signed-off-by: Brendan Cunningham <brendan.cunningham@intel.com>
Signed-off-by: Brian Welty <brian.welty@intel.com>
Signed-off-by: Caz Yokoyama <caz.yokoyama@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Easwar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Jim Snow <jim.m.snow@intel.com>
Signed-off-by: John Gregor <john.a.gregor@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Kevin Pine <kevin.pine@intel.com>
Signed-off-by: Kyle Liddell <kyle.liddell@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Ravi Krishnaswamy <ravi.krishnaswamy@intel.com>
Signed-off-by: Sadanand Warrier <sadanand.warrier@intel.com>
Signed-off-by: Sanath Kumar <sanath.s.kumar@intel.com>
Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Vlad Danushevsky <vladimir.danusevsky@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/Documentation/infiniband/sysfs.txt b/Documentation/infiniband/sysfs.txt
index ddd519b..9028b02 100644
--- a/Documentation/infiniband/sysfs.txt
+++ b/Documentation/infiniband/sysfs.txt
@@ -64,3 +64,23 @@
fw_ver - Firmware version
hca_type - HCA type: "MT23108", "MT25208 (MT23108 compat mode)",
or "MT25208"
+
+HFI1
+
+ The hfi1 driver also creates these additional files:
+
+ hw_rev - hardware revision
+ board_id - manufacturing board id
+ tempsense - thermal sense information
+ serial - board serial number
+ nfreectxts - number of free user contexts
+ nctxts - number of allowed contexts (PSM2)
+ chip_reset - diagnostic (root only)
+ boardversion - board version
+ ports/1/
+ CMgtA/
+ cc_settings_bin - CCA tables used by PSM2
+ cc_table_bin
+ sc2v/ - 32 files (0 - 31) used to translate sl->vl
+ sl2sc/ - 32 files (0 - 31) used to translate sl->sc
+ vl2mtu/ - 16 (0 - 15) files used to determine MTU for vl
diff --git a/MAINTAINERS b/MAINTAINERS
index db1a523..2249ac8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9809,6 +9809,12 @@
S: Odd Fixes
F: drivers/staging/xgifb/
+HFI1 DRIVER
+M: Mike Marciniszyn <infinipath@intel.com>
+L: linux-rdma@vger.kernel.org
+S: Supported
+F: drivers/staging/rdma/hfi1
+
STARFIRE/DURALAN NETWORK DRIVER
M: Ion Badulescu <ionut@badula.org>
S: Odd Fixes
diff --git a/drivers/staging/rdma/Kconfig b/drivers/staging/rdma/Kconfig
index 5084088..cf5fe9b 100644
--- a/drivers/staging/rdma/Kconfig
+++ b/drivers/staging/rdma/Kconfig
@@ -24,6 +24,8 @@
source "drivers/staging/rdma/amso1100/Kconfig"
+source "drivers/staging/rdma/hfi1/Kconfig"
+
source "drivers/staging/rdma/ipath/Kconfig"
endif
diff --git a/drivers/staging/rdma/Makefile b/drivers/staging/rdma/Makefile
index a2a459a..cbd915a 100644
--- a/drivers/staging/rdma/Makefile
+++ b/drivers/staging/rdma/Makefile
@@ -1,3 +1,4 @@
# Entries for RDMA_STAGING tree
obj-$(CONFIG_INFINIBAND_AMSO1100) += amso1100/
+obj-$(CONFIG_INFINIBAND_HFI1) += hfi1/
obj-$(CONFIG_INFINIBAND_IPATH) += ipath/
diff --git a/drivers/staging/rdma/hfi1/Kconfig b/drivers/staging/rdma/hfi1/Kconfig
new file mode 100644
index 0000000..fd25078
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/Kconfig
@@ -0,0 +1,37 @@
+config INFINIBAND_HFI1
+ tristate "Intel OPA Gen1 support"
+ depends on X86_64
+ default m
+ ---help---
+ This is a low-level driver for Intel OPA Gen1 adapter.
+config HFI1_DEBUG_SDMA_ORDER
+ bool "HFI1 SDMA Order debug"
+ depends on INFINIBAND_HFI1
+ default n
+ ---help---
+ This is a debug flag to test for out of order
+ sdma completions for unit testing
+config HFI1_VERBS_31BIT_PSN
+ bool "HFI1 enable 31 bit PSN"
+ depends on INFINIBAND_HFI1
+ default y
+ ---help---
+ Setting this enables 31 BIT PSN
+ For verbs RC/UC
+config SDMA_VERBOSITY
+ bool "Config SDMA Verbosity"
+ depends on INFINIBAND_HFI1
+ default n
+ ---help---
+ This is a configuration flag to enable verbose
+ SDMA debug
+config PRESCAN_RXQ
+ bool "Enable prescanning of the RX queue for ECNs"
+ depends on INFINIBAND_HFI1
+ default n
+ ---help---
+ This option toggles the prescanning of the receive queue for
+ Explicit Congestion Notifications. If an ECN is detected, it
+ is processed as quickly as possible, the ECN is toggled off.
+ After the prescanning step, the receive queue is processed as
+ usual.
diff --git a/drivers/staging/rdma/hfi1/Makefile b/drivers/staging/rdma/hfi1/Makefile
new file mode 100644
index 0000000..2e5daa6
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/Makefile
@@ -0,0 +1,19 @@
+#
+# HFI driver
+#
+#
+#
+# Called from the kernel module build system.
+#
+obj-$(CONFIG_INFINIBAND_HFI1) += hfi1.o
+
+hfi1-y := chip.o cq.o device.o diag.o dma.o driver.o eprom.o file_ops.o firmware.o \
+ init.o intr.o keys.o mad.o mmap.o mr.o pcie.o pio.o pio_copy.o \
+ qp.o qsfp.o rc.o ruc.o sdma.o srq.o sysfs.o trace.o twsi.o \
+ uc.o ud.o user_pages.o user_sdma.o verbs_mcast.o verbs.o
+hfi1-$(CONFIG_DEBUG_FS) += debugfs.o
+
+CFLAGS_trace.o = -I$(src)
+ifdef MVERSION
+CFLAGS_driver.o = -DHFI_DRIVER_VERSION_BASE=\"$(MVERSION)\"
+endif
diff --git a/drivers/staging/rdma/hfi1/TODO b/drivers/staging/rdma/hfi1/TODO
new file mode 100644
index 0000000..05de0da
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/TODO
@@ -0,0 +1,6 @@
+July, 2015
+
+- Remove unneeded file entries in sysfs
+- Remove software processing of IB protocol and place in library for use
+ by qib, ipath (if still present), hfi1, and eventually soft-roce
+
diff --git a/drivers/staging/rdma/hfi1/chip.c b/drivers/staging/rdma/hfi1/chip.c
new file mode 100644
index 0000000..654eafe
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/chip.c
@@ -0,0 +1,10798 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * This file contains all of the code that is specific to the HFI chip
+ */
+
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+
+#include "hfi.h"
+#include "trace.h"
+#include "mad.h"
+#include "pio.h"
+#include "sdma.h"
+#include "eprom.h"
+
+#define NUM_IB_PORTS 1
+
+uint kdeth_qp;
+module_param_named(kdeth_qp, kdeth_qp, uint, S_IRUGO);
+MODULE_PARM_DESC(kdeth_qp, "Set the KDETH queue pair prefix");
+
+uint num_vls = HFI1_MAX_VLS_SUPPORTED;
+module_param(num_vls, uint, S_IRUGO);
+MODULE_PARM_DESC(num_vls, "Set number of Virtual Lanes to use (1-8)");
+
+/*
+ * Default time to aggregate two 10K packets from the idle state
+ * (timer not running). The timer starts at the end of the first packet,
+ * so only the time for one 10K packet and header plus a bit extra is needed.
+ * 10 * 1024 + 64 header byte = 10304 byte
+ * 10304 byte / 12.5 GB/s = 824.32ns
+ */
+uint rcv_intr_timeout = (824 + 16); /* 16 is for coalescing interrupt */
+module_param(rcv_intr_timeout, uint, S_IRUGO);
+MODULE_PARM_DESC(rcv_intr_timeout, "Receive interrupt mitigation timeout in ns");
+
+uint rcv_intr_count = 16; /* same as qib */
+module_param(rcv_intr_count, uint, S_IRUGO);
+MODULE_PARM_DESC(rcv_intr_count, "Receive interrupt mitigation count");
+
+ushort link_crc_mask = SUPPORTED_CRCS;
+module_param(link_crc_mask, ushort, S_IRUGO);
+MODULE_PARM_DESC(link_crc_mask, "CRCs to use on the link");
+
+uint loopback;
+module_param_named(loopback, loopback, uint, S_IRUGO);
+MODULE_PARM_DESC(loopback, "Put into loopback mode (1 = serdes, 3 = external cable");
+
+/* Other driver tunables */
+uint rcv_intr_dynamic = 1; /* enable dynamic mode for rcv int mitigation*/
+static ushort crc_14b_sideband = 1;
+static uint use_flr = 1;
+uint quick_linkup; /* skip LNI */
+
+struct flag_table {
+ u64 flag; /* the flag */
+ char *str; /* description string */
+ u16 extra; /* extra information */
+ u16 unused0;
+ u32 unused1;
+};
+
+/* str must be a string constant */
+#define FLAG_ENTRY(str, extra, flag) {flag, str, extra}
+#define FLAG_ENTRY0(str, flag) {flag, str, 0}
+
+/* Send Error Consequences */
+#define SEC_WRITE_DROPPED 0x1
+#define SEC_PACKET_DROPPED 0x2
+#define SEC_SC_HALTED 0x4 /* per-context only */
+#define SEC_SPC_FREEZE 0x8 /* per-HFI only */
+
+#define VL15CTXT 1
+#define MIN_KERNEL_KCTXTS 2
+#define NUM_MAP_REGS 32
+
+/* Bit offset into the GUID which carries HFI id information */
+#define GUID_HFI_INDEX_SHIFT 39
+
+/* extract the emulation revision */
+#define emulator_rev(dd) ((dd)->irev >> 8)
+/* parallel and serial emulation versions are 3 and 4 respectively */
+#define is_emulator_p(dd) ((((dd)->irev) & 0xf) == 3)
+#define is_emulator_s(dd) ((((dd)->irev) & 0xf) == 4)
+
+/* RSM fields */
+
+/* packet type */
+#define IB_PACKET_TYPE 2ull
+#define QW_SHIFT 6ull
+/* QPN[7..1] */
+#define QPN_WIDTH 7ull
+
+/* LRH.BTH: QW 0, OFFSET 48 - for match */
+#define LRH_BTH_QW 0ull
+#define LRH_BTH_BIT_OFFSET 48ull
+#define LRH_BTH_OFFSET(off) ((LRH_BTH_QW << QW_SHIFT) | (off))
+#define LRH_BTH_MATCH_OFFSET LRH_BTH_OFFSET(LRH_BTH_BIT_OFFSET)
+#define LRH_BTH_SELECT
+#define LRH_BTH_MASK 3ull
+#define LRH_BTH_VALUE 2ull
+
+/* LRH.SC[3..0] QW 0, OFFSET 56 - for match */
+#define LRH_SC_QW 0ull
+#define LRH_SC_BIT_OFFSET 56ull
+#define LRH_SC_OFFSET(off) ((LRH_SC_QW << QW_SHIFT) | (off))
+#define LRH_SC_MATCH_OFFSET LRH_SC_OFFSET(LRH_SC_BIT_OFFSET)
+#define LRH_SC_MASK 128ull
+#define LRH_SC_VALUE 0ull
+
+/* SC[n..0] QW 0, OFFSET 60 - for select */
+#define LRH_SC_SELECT_OFFSET ((LRH_SC_QW << QW_SHIFT) | (60ull))
+
+/* QPN[m+n:1] QW 1, OFFSET 1 */
+#define QPN_SELECT_OFFSET ((1ull << QW_SHIFT) | (1ull))
+
+/* defines to build power on SC2VL table */
+#define SC2VL_VAL( \
+ num, \
+ sc0, sc0val, \
+ sc1, sc1val, \
+ sc2, sc2val, \
+ sc3, sc3val, \
+ sc4, sc4val, \
+ sc5, sc5val, \
+ sc6, sc6val, \
+ sc7, sc7val) \
+( \
+ ((u64)(sc0val) << SEND_SC2VLT##num##_SC##sc0##_SHIFT) | \
+ ((u64)(sc1val) << SEND_SC2VLT##num##_SC##sc1##_SHIFT) | \
+ ((u64)(sc2val) << SEND_SC2VLT##num##_SC##sc2##_SHIFT) | \
+ ((u64)(sc3val) << SEND_SC2VLT##num##_SC##sc3##_SHIFT) | \
+ ((u64)(sc4val) << SEND_SC2VLT##num##_SC##sc4##_SHIFT) | \
+ ((u64)(sc5val) << SEND_SC2VLT##num##_SC##sc5##_SHIFT) | \
+ ((u64)(sc6val) << SEND_SC2VLT##num##_SC##sc6##_SHIFT) | \
+ ((u64)(sc7val) << SEND_SC2VLT##num##_SC##sc7##_SHIFT) \
+)
+
+#define DC_SC_VL_VAL( \
+ range, \
+ e0, e0val, \
+ e1, e1val, \
+ e2, e2val, \
+ e3, e3val, \
+ e4, e4val, \
+ e5, e5val, \
+ e6, e6val, \
+ e7, e7val, \
+ e8, e8val, \
+ e9, e9val, \
+ e10, e10val, \
+ e11, e11val, \
+ e12, e12val, \
+ e13, e13val, \
+ e14, e14val, \
+ e15, e15val) \
+( \
+ ((u64)(e0val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e0##_SHIFT) | \
+ ((u64)(e1val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e1##_SHIFT) | \
+ ((u64)(e2val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e2##_SHIFT) | \
+ ((u64)(e3val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e3##_SHIFT) | \
+ ((u64)(e4val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e4##_SHIFT) | \
+ ((u64)(e5val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e5##_SHIFT) | \
+ ((u64)(e6val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e6##_SHIFT) | \
+ ((u64)(e7val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e7##_SHIFT) | \
+ ((u64)(e8val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e8##_SHIFT) | \
+ ((u64)(e9val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e9##_SHIFT) | \
+ ((u64)(e10val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e10##_SHIFT) | \
+ ((u64)(e11val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e11##_SHIFT) | \
+ ((u64)(e12val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e12##_SHIFT) | \
+ ((u64)(e13val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e13##_SHIFT) | \
+ ((u64)(e14val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e14##_SHIFT) | \
+ ((u64)(e15val) << DCC_CFG_SC_VL_TABLE_##range##_ENTRY##e15##_SHIFT) \
+)
+
+/* all CceStatus sub-block freeze bits */
+#define ALL_FROZE (CCE_STATUS_SDMA_FROZE_SMASK \
+ | CCE_STATUS_RXE_FROZE_SMASK \
+ | CCE_STATUS_TXE_FROZE_SMASK \
+ | CCE_STATUS_TXE_PIO_FROZE_SMASK)
+/* all CceStatus sub-block TXE pause bits */
+#define ALL_TXE_PAUSE (CCE_STATUS_TXE_PIO_PAUSED_SMASK \
+ | CCE_STATUS_TXE_PAUSED_SMASK \
+ | CCE_STATUS_SDMA_PAUSED_SMASK)
+/* all CceStatus sub-block RXE pause bits */
+#define ALL_RXE_PAUSE CCE_STATUS_RXE_PAUSED_SMASK
+
+/*
+ * CCE Error flags.
+ */
+static struct flag_table cce_err_status_flags[] = {
+/* 0*/ FLAG_ENTRY0("CceCsrParityErr",
+ CCE_ERR_STATUS_CCE_CSR_PARITY_ERR_SMASK),
+/* 1*/ FLAG_ENTRY0("CceCsrReadBadAddrErr",
+ CCE_ERR_STATUS_CCE_CSR_READ_BAD_ADDR_ERR_SMASK),
+/* 2*/ FLAG_ENTRY0("CceCsrWriteBadAddrErr",
+ CCE_ERR_STATUS_CCE_CSR_WRITE_BAD_ADDR_ERR_SMASK),
+/* 3*/ FLAG_ENTRY0("CceTrgtAsyncFifoParityErr",
+ CCE_ERR_STATUS_CCE_TRGT_ASYNC_FIFO_PARITY_ERR_SMASK),
+/* 4*/ FLAG_ENTRY0("CceTrgtAccessErr",
+ CCE_ERR_STATUS_CCE_TRGT_ACCESS_ERR_SMASK),
+/* 5*/ FLAG_ENTRY0("CceRspdDataParityErr",
+ CCE_ERR_STATUS_CCE_RSPD_DATA_PARITY_ERR_SMASK),
+/* 6*/ FLAG_ENTRY0("CceCli0AsyncFifoParityErr",
+ CCE_ERR_STATUS_CCE_CLI0_ASYNC_FIFO_PARITY_ERR_SMASK),
+/* 7*/ FLAG_ENTRY0("CceCsrCfgBusParityErr",
+ CCE_ERR_STATUS_CCE_CSR_CFG_BUS_PARITY_ERR_SMASK),
+/* 8*/ FLAG_ENTRY0("CceCli2AsyncFifoParityErr",
+ CCE_ERR_STATUS_CCE_CLI2_ASYNC_FIFO_PARITY_ERR_SMASK),
+/* 9*/ FLAG_ENTRY0("CceCli1AsyncFifoPioCrdtParityErr",
+ CCE_ERR_STATUS_CCE_CLI1_ASYNC_FIFO_PIO_CRDT_PARITY_ERR_SMASK),
+/*10*/ FLAG_ENTRY0("CceCli1AsyncFifoPioCrdtParityErr",
+ CCE_ERR_STATUS_CCE_CLI1_ASYNC_FIFO_SDMA_HD_PARITY_ERR_SMASK),
+/*11*/ FLAG_ENTRY0("CceCli1AsyncFifoRxdmaParityError",
+ CCE_ERR_STATUS_CCE_CLI1_ASYNC_FIFO_RXDMA_PARITY_ERROR_SMASK),
+/*12*/ FLAG_ENTRY0("CceCli1AsyncFifoDbgParityError",
+ CCE_ERR_STATUS_CCE_CLI1_ASYNC_FIFO_DBG_PARITY_ERROR_SMASK),
+/*13*/ FLAG_ENTRY0("PcicRetryMemCorErr",
+ CCE_ERR_STATUS_PCIC_RETRY_MEM_COR_ERR_SMASK),
+/*14*/ FLAG_ENTRY0("PcicRetryMemCorErr",
+ CCE_ERR_STATUS_PCIC_RETRY_SOT_MEM_COR_ERR_SMASK),
+/*15*/ FLAG_ENTRY0("PcicPostHdQCorErr",
+ CCE_ERR_STATUS_PCIC_POST_HD_QCOR_ERR_SMASK),
+/*16*/ FLAG_ENTRY0("PcicPostHdQCorErr",
+ CCE_ERR_STATUS_PCIC_POST_DAT_QCOR_ERR_SMASK),
+/*17*/ FLAG_ENTRY0("PcicPostHdQCorErr",
+ CCE_ERR_STATUS_PCIC_CPL_HD_QCOR_ERR_SMASK),
+/*18*/ FLAG_ENTRY0("PcicCplDatQCorErr",
+ CCE_ERR_STATUS_PCIC_CPL_DAT_QCOR_ERR_SMASK),
+/*19*/ FLAG_ENTRY0("PcicNPostHQParityErr",
+ CCE_ERR_STATUS_PCIC_NPOST_HQ_PARITY_ERR_SMASK),
+/*20*/ FLAG_ENTRY0("PcicNPostDatQParityErr",
+ CCE_ERR_STATUS_PCIC_NPOST_DAT_QPARITY_ERR_SMASK),
+/*21*/ FLAG_ENTRY0("PcicRetryMemUncErr",
+ CCE_ERR_STATUS_PCIC_RETRY_MEM_UNC_ERR_SMASK),
+/*22*/ FLAG_ENTRY0("PcicRetrySotMemUncErr",
+ CCE_ERR_STATUS_PCIC_RETRY_SOT_MEM_UNC_ERR_SMASK),
+/*23*/ FLAG_ENTRY0("PcicPostHdQUncErr",
+ CCE_ERR_STATUS_PCIC_POST_HD_QUNC_ERR_SMASK),
+/*24*/ FLAG_ENTRY0("PcicPostDatQUncErr",
+ CCE_ERR_STATUS_PCIC_POST_DAT_QUNC_ERR_SMASK),
+/*25*/ FLAG_ENTRY0("PcicCplHdQUncErr",
+ CCE_ERR_STATUS_PCIC_CPL_HD_QUNC_ERR_SMASK),
+/*26*/ FLAG_ENTRY0("PcicCplDatQUncErr",
+ CCE_ERR_STATUS_PCIC_CPL_DAT_QUNC_ERR_SMASK),
+/*27*/ FLAG_ENTRY0("PcicTransmitFrontParityErr",
+ CCE_ERR_STATUS_PCIC_TRANSMIT_FRONT_PARITY_ERR_SMASK),
+/*28*/ FLAG_ENTRY0("PcicTransmitBackParityErr",
+ CCE_ERR_STATUS_PCIC_TRANSMIT_BACK_PARITY_ERR_SMASK),
+/*29*/ FLAG_ENTRY0("PcicReceiveParityErr",
+ CCE_ERR_STATUS_PCIC_RECEIVE_PARITY_ERR_SMASK),
+/*30*/ FLAG_ENTRY0("CceTrgtCplTimeoutErr",
+ CCE_ERR_STATUS_CCE_TRGT_CPL_TIMEOUT_ERR_SMASK),
+/*31*/ FLAG_ENTRY0("LATriggered",
+ CCE_ERR_STATUS_LA_TRIGGERED_SMASK),
+/*32*/ FLAG_ENTRY0("CceSegReadBadAddrErr",
+ CCE_ERR_STATUS_CCE_SEG_READ_BAD_ADDR_ERR_SMASK),
+/*33*/ FLAG_ENTRY0("CceSegWriteBadAddrErr",
+ CCE_ERR_STATUS_CCE_SEG_WRITE_BAD_ADDR_ERR_SMASK),
+/*34*/ FLAG_ENTRY0("CceRcplAsyncFifoParityErr",
+ CCE_ERR_STATUS_CCE_RCPL_ASYNC_FIFO_PARITY_ERR_SMASK),
+/*35*/ FLAG_ENTRY0("CceRxdmaConvFifoParityErr",
+ CCE_ERR_STATUS_CCE_RXDMA_CONV_FIFO_PARITY_ERR_SMASK),
+/*36*/ FLAG_ENTRY0("CceMsixTableCorErr",
+ CCE_ERR_STATUS_CCE_MSIX_TABLE_COR_ERR_SMASK),
+/*37*/ FLAG_ENTRY0("CceMsixTableUncErr",
+ CCE_ERR_STATUS_CCE_MSIX_TABLE_UNC_ERR_SMASK),
+/*38*/ FLAG_ENTRY0("CceIntMapCorErr",
+ CCE_ERR_STATUS_CCE_INT_MAP_COR_ERR_SMASK),
+/*39*/ FLAG_ENTRY0("CceIntMapUncErr",
+ CCE_ERR_STATUS_CCE_INT_MAP_UNC_ERR_SMASK),
+/*40*/ FLAG_ENTRY0("CceMsixCsrParityErr",
+ CCE_ERR_STATUS_CCE_MSIX_CSR_PARITY_ERR_SMASK),
+/*41-63 reserved*/
+};
+
+/*
+ * Misc Error flags
+ */
+#define MES(text) MISC_ERR_STATUS_MISC_##text##_ERR_SMASK
+static struct flag_table misc_err_status_flags[] = {
+/* 0*/ FLAG_ENTRY0("CSR_PARITY", MES(CSR_PARITY)),
+/* 1*/ FLAG_ENTRY0("CSR_READ_BAD_ADDR", MES(CSR_READ_BAD_ADDR)),
+/* 2*/ FLAG_ENTRY0("CSR_WRITE_BAD_ADDR", MES(CSR_WRITE_BAD_ADDR)),
+/* 3*/ FLAG_ENTRY0("SBUS_WRITE_FAILED", MES(SBUS_WRITE_FAILED)),
+/* 4*/ FLAG_ENTRY0("KEY_MISMATCH", MES(KEY_MISMATCH)),
+/* 5*/ FLAG_ENTRY0("FW_AUTH_FAILED", MES(FW_AUTH_FAILED)),
+/* 6*/ FLAG_ENTRY0("EFUSE_CSR_PARITY", MES(EFUSE_CSR_PARITY)),
+/* 7*/ FLAG_ENTRY0("EFUSE_READ_BAD_ADDR", MES(EFUSE_READ_BAD_ADDR)),
+/* 8*/ FLAG_ENTRY0("EFUSE_WRITE", MES(EFUSE_WRITE)),
+/* 9*/ FLAG_ENTRY0("EFUSE_DONE_PARITY", MES(EFUSE_DONE_PARITY)),
+/*10*/ FLAG_ENTRY0("INVALID_EEP_CMD", MES(INVALID_EEP_CMD)),
+/*11*/ FLAG_ENTRY0("MBIST_FAIL", MES(MBIST_FAIL)),
+/*12*/ FLAG_ENTRY0("PLL_LOCK_FAIL", MES(PLL_LOCK_FAIL))
+};
+
+/*
+ * TXE PIO Error flags and consequences
+ */
+static struct flag_table pio_err_status_flags[] = {
+/* 0*/ FLAG_ENTRY("PioWriteBadCtxt",
+ SEC_WRITE_DROPPED,
+ SEND_PIO_ERR_STATUS_PIO_WRITE_BAD_CTXT_ERR_SMASK),
+/* 1*/ FLAG_ENTRY("PioWriteAddrParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_WRITE_ADDR_PARITY_ERR_SMASK),
+/* 2*/ FLAG_ENTRY("PioCsrParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_CSR_PARITY_ERR_SMASK),
+/* 3*/ FLAG_ENTRY("PioSbMemFifo0",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_SB_MEM_FIFO0_ERR_SMASK),
+/* 4*/ FLAG_ENTRY("PioSbMemFifo1",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_SB_MEM_FIFO1_ERR_SMASK),
+/* 5*/ FLAG_ENTRY("PioPccFifoParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_PCC_FIFO_PARITY_ERR_SMASK),
+/* 6*/ FLAG_ENTRY("PioPecFifoParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_PEC_FIFO_PARITY_ERR_SMASK),
+/* 7*/ FLAG_ENTRY("PioSbrdctlCrrelParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_SBRDCTL_CRREL_PARITY_ERR_SMASK),
+/* 8*/ FLAG_ENTRY("PioSbrdctrlCrrelFifoParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_SBRDCTRL_CRREL_FIFO_PARITY_ERR_SMASK),
+/* 9*/ FLAG_ENTRY("PioPktEvictFifoParityErr",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_PKT_EVICT_FIFO_PARITY_ERR_SMASK),
+/*10*/ FLAG_ENTRY("PioSmPktResetParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_SM_PKT_RESET_PARITY_ERR_SMASK),
+/*11*/ FLAG_ENTRY("PioVlLenMemBank0Unc",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_VL_LEN_MEM_BANK0_UNC_ERR_SMASK),
+/*12*/ FLAG_ENTRY("PioVlLenMemBank1Unc",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_VL_LEN_MEM_BANK1_UNC_ERR_SMASK),
+/*13*/ FLAG_ENTRY("PioVlLenMemBank0Cor",
+ 0,
+ SEND_PIO_ERR_STATUS_PIO_VL_LEN_MEM_BANK0_COR_ERR_SMASK),
+/*14*/ FLAG_ENTRY("PioVlLenMemBank1Cor",
+ 0,
+ SEND_PIO_ERR_STATUS_PIO_VL_LEN_MEM_BANK1_COR_ERR_SMASK),
+/*15*/ FLAG_ENTRY("PioCreditRetFifoParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_CREDIT_RET_FIFO_PARITY_ERR_SMASK),
+/*16*/ FLAG_ENTRY("PioPpmcPblFifo",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_PPMC_PBL_FIFO_ERR_SMASK),
+/*17*/ FLAG_ENTRY("PioInitSmIn",
+ 0,
+ SEND_PIO_ERR_STATUS_PIO_INIT_SM_IN_ERR_SMASK),
+/*18*/ FLAG_ENTRY("PioPktEvictSmOrArbSm",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_PKT_EVICT_SM_OR_ARB_SM_ERR_SMASK),
+/*19*/ FLAG_ENTRY("PioHostAddrMemUnc",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_HOST_ADDR_MEM_UNC_ERR_SMASK),
+/*20*/ FLAG_ENTRY("PioHostAddrMemCor",
+ 0,
+ SEND_PIO_ERR_STATUS_PIO_HOST_ADDR_MEM_COR_ERR_SMASK),
+/*21*/ FLAG_ENTRY("PioWriteDataParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_WRITE_DATA_PARITY_ERR_SMASK),
+/*22*/ FLAG_ENTRY("PioStateMachine",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_STATE_MACHINE_ERR_SMASK),
+/*23*/ FLAG_ENTRY("PioWriteQwValidParity",
+ SEC_WRITE_DROPPED|SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_WRITE_QW_VALID_PARITY_ERR_SMASK),
+/*24*/ FLAG_ENTRY("PioBlockQwCountParity",
+ SEC_WRITE_DROPPED|SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_BLOCK_QW_COUNT_PARITY_ERR_SMASK),
+/*25*/ FLAG_ENTRY("PioVlfVlLenParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_VLF_VL_LEN_PARITY_ERR_SMASK),
+/*26*/ FLAG_ENTRY("PioVlfSopParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_VLF_SOP_PARITY_ERR_SMASK),
+/*27*/ FLAG_ENTRY("PioVlFifoParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_VL_FIFO_PARITY_ERR_SMASK),
+/*28*/ FLAG_ENTRY("PioPpmcBqcMemParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_PPMC_BQC_MEM_PARITY_ERR_SMASK),
+/*29*/ FLAG_ENTRY("PioPpmcSopLen",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_PPMC_SOP_LEN_ERR_SMASK),
+/*30-31 reserved*/
+/*32*/ FLAG_ENTRY("PioCurrentFreeCntParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_CURRENT_FREE_CNT_PARITY_ERR_SMASK),
+/*33*/ FLAG_ENTRY("PioLastReturnedCntParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_LAST_RETURNED_CNT_PARITY_ERR_SMASK),
+/*34*/ FLAG_ENTRY("PioPccSopHeadParity",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_PCC_SOP_HEAD_PARITY_ERR_SMASK),
+/*35*/ FLAG_ENTRY("PioPecSopHeadParityErr",
+ SEC_SPC_FREEZE,
+ SEND_PIO_ERR_STATUS_PIO_PEC_SOP_HEAD_PARITY_ERR_SMASK),
+/*36-63 reserved*/
+};
+
+/* TXE PIO errors that cause an SPC freeze */
+#define ALL_PIO_FREEZE_ERR \
+ (SEND_PIO_ERR_STATUS_PIO_WRITE_ADDR_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_CSR_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_SB_MEM_FIFO0_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_SB_MEM_FIFO1_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_PCC_FIFO_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_PEC_FIFO_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_SBRDCTL_CRREL_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_SBRDCTRL_CRREL_FIFO_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_PKT_EVICT_FIFO_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_SM_PKT_RESET_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_VL_LEN_MEM_BANK0_UNC_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_VL_LEN_MEM_BANK1_UNC_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_CREDIT_RET_FIFO_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_PPMC_PBL_FIFO_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_PKT_EVICT_SM_OR_ARB_SM_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_HOST_ADDR_MEM_UNC_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_WRITE_DATA_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_STATE_MACHINE_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_WRITE_QW_VALID_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_BLOCK_QW_COUNT_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_VLF_VL_LEN_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_VLF_SOP_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_VL_FIFO_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_PPMC_BQC_MEM_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_PPMC_SOP_LEN_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_CURRENT_FREE_CNT_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_LAST_RETURNED_CNT_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_PCC_SOP_HEAD_PARITY_ERR_SMASK \
+ | SEND_PIO_ERR_STATUS_PIO_PEC_SOP_HEAD_PARITY_ERR_SMASK)
+
+/*
+ * TXE SDMA Error flags
+ */
+static struct flag_table sdma_err_status_flags[] = {
+/* 0*/ FLAG_ENTRY0("SDmaRpyTagErr",
+ SEND_DMA_ERR_STATUS_SDMA_RPY_TAG_ERR_SMASK),
+/* 1*/ FLAG_ENTRY0("SDmaCsrParityErr",
+ SEND_DMA_ERR_STATUS_SDMA_CSR_PARITY_ERR_SMASK),
+/* 2*/ FLAG_ENTRY0("SDmaPcieReqTrackingUncErr",
+ SEND_DMA_ERR_STATUS_SDMA_PCIE_REQ_TRACKING_UNC_ERR_SMASK),
+/* 3*/ FLAG_ENTRY0("SDmaPcieReqTrackingCorErr",
+ SEND_DMA_ERR_STATUS_SDMA_PCIE_REQ_TRACKING_COR_ERR_SMASK),
+/*04-63 reserved*/
+};
+
+/* TXE SDMA errors that cause an SPC freeze */
+#define ALL_SDMA_FREEZE_ERR \
+ (SEND_DMA_ERR_STATUS_SDMA_RPY_TAG_ERR_SMASK \
+ | SEND_DMA_ERR_STATUS_SDMA_CSR_PARITY_ERR_SMASK \
+ | SEND_DMA_ERR_STATUS_SDMA_PCIE_REQ_TRACKING_UNC_ERR_SMASK)
+
+/*
+ * TXE Egress Error flags
+ */
+#define SEES(text) SEND_EGRESS_ERR_STATUS_##text##_ERR_SMASK
+static struct flag_table egress_err_status_flags[] = {
+/* 0*/ FLAG_ENTRY0("TxPktIntegrityMemCorErr", SEES(TX_PKT_INTEGRITY_MEM_COR)),
+/* 1*/ FLAG_ENTRY0("TxPktIntegrityMemUncErr", SEES(TX_PKT_INTEGRITY_MEM_UNC)),
+/* 2 reserved */
+/* 3*/ FLAG_ENTRY0("TxEgressFifoUnderrunOrParityErr",
+ SEES(TX_EGRESS_FIFO_UNDERRUN_OR_PARITY)),
+/* 4*/ FLAG_ENTRY0("TxLinkdownErr", SEES(TX_LINKDOWN)),
+/* 5*/ FLAG_ENTRY0("TxIncorrectLinkStateErr", SEES(TX_INCORRECT_LINK_STATE)),
+/* 6 reserved */
+/* 7*/ FLAG_ENTRY0("TxPioLaunchIntfParityErr",
+ SEES(TX_PIO_LAUNCH_INTF_PARITY)),
+/* 8*/ FLAG_ENTRY0("TxSdmaLaunchIntfParityErr",
+ SEES(TX_SDMA_LAUNCH_INTF_PARITY)),
+/* 9-10 reserved */
+/*11*/ FLAG_ENTRY0("TxSbrdCtlStateMachineParityErr",
+ SEES(TX_SBRD_CTL_STATE_MACHINE_PARITY)),
+/*12*/ FLAG_ENTRY0("TxIllegalVLErr", SEES(TX_ILLEGAL_VL)),
+/*13*/ FLAG_ENTRY0("TxLaunchCsrParityErr", SEES(TX_LAUNCH_CSR_PARITY)),
+/*14*/ FLAG_ENTRY0("TxSbrdCtlCsrParityErr", SEES(TX_SBRD_CTL_CSR_PARITY)),
+/*15*/ FLAG_ENTRY0("TxConfigParityErr", SEES(TX_CONFIG_PARITY)),
+/*16*/ FLAG_ENTRY0("TxSdma0DisallowedPacketErr",
+ SEES(TX_SDMA0_DISALLOWED_PACKET)),
+/*17*/ FLAG_ENTRY0("TxSdma1DisallowedPacketErr",
+ SEES(TX_SDMA1_DISALLOWED_PACKET)),
+/*18*/ FLAG_ENTRY0("TxSdma2DisallowedPacketErr",
+ SEES(TX_SDMA2_DISALLOWED_PACKET)),
+/*19*/ FLAG_ENTRY0("TxSdma3DisallowedPacketErr",
+ SEES(TX_SDMA3_DISALLOWED_PACKET)),
+/*20*/ FLAG_ENTRY0("TxSdma4DisallowedPacketErr",
+ SEES(TX_SDMA4_DISALLOWED_PACKET)),
+/*21*/ FLAG_ENTRY0("TxSdma5DisallowedPacketErr",
+ SEES(TX_SDMA5_DISALLOWED_PACKET)),
+/*22*/ FLAG_ENTRY0("TxSdma6DisallowedPacketErr",
+ SEES(TX_SDMA6_DISALLOWED_PACKET)),
+/*23*/ FLAG_ENTRY0("TxSdma7DisallowedPacketErr",
+ SEES(TX_SDMA7_DISALLOWED_PACKET)),
+/*24*/ FLAG_ENTRY0("TxSdma8DisallowedPacketErr",
+ SEES(TX_SDMA8_DISALLOWED_PACKET)),
+/*25*/ FLAG_ENTRY0("TxSdma9DisallowedPacketErr",
+ SEES(TX_SDMA9_DISALLOWED_PACKET)),
+/*26*/ FLAG_ENTRY0("TxSdma10DisallowedPacketErr",
+ SEES(TX_SDMA10_DISALLOWED_PACKET)),
+/*27*/ FLAG_ENTRY0("TxSdma11DisallowedPacketErr",
+ SEES(TX_SDMA11_DISALLOWED_PACKET)),
+/*28*/ FLAG_ENTRY0("TxSdma12DisallowedPacketErr",
+ SEES(TX_SDMA12_DISALLOWED_PACKET)),
+/*29*/ FLAG_ENTRY0("TxSdma13DisallowedPacketErr",
+ SEES(TX_SDMA13_DISALLOWED_PACKET)),
+/*30*/ FLAG_ENTRY0("TxSdma14DisallowedPacketErr",
+ SEES(TX_SDMA14_DISALLOWED_PACKET)),
+/*31*/ FLAG_ENTRY0("TxSdma15DisallowedPacketErr",
+ SEES(TX_SDMA15_DISALLOWED_PACKET)),
+/*32*/ FLAG_ENTRY0("TxLaunchFifo0UncOrParityErr",
+ SEES(TX_LAUNCH_FIFO0_UNC_OR_PARITY)),
+/*33*/ FLAG_ENTRY0("TxLaunchFifo1UncOrParityErr",
+ SEES(TX_LAUNCH_FIFO1_UNC_OR_PARITY)),
+/*34*/ FLAG_ENTRY0("TxLaunchFifo2UncOrParityErr",
+ SEES(TX_LAUNCH_FIFO2_UNC_OR_PARITY)),
+/*35*/ FLAG_ENTRY0("TxLaunchFifo3UncOrParityErr",
+ SEES(TX_LAUNCH_FIFO3_UNC_OR_PARITY)),
+/*36*/ FLAG_ENTRY0("TxLaunchFifo4UncOrParityErr",
+ SEES(TX_LAUNCH_FIFO4_UNC_OR_PARITY)),
+/*37*/ FLAG_ENTRY0("TxLaunchFifo5UncOrParityErr",
+ SEES(TX_LAUNCH_FIFO5_UNC_OR_PARITY)),
+/*38*/ FLAG_ENTRY0("TxLaunchFifo6UncOrParityErr",
+ SEES(TX_LAUNCH_FIFO6_UNC_OR_PARITY)),
+/*39*/ FLAG_ENTRY0("TxLaunchFifo7UncOrParityErr",
+ SEES(TX_LAUNCH_FIFO7_UNC_OR_PARITY)),
+/*40*/ FLAG_ENTRY0("TxLaunchFifo8UncOrParityErr",
+ SEES(TX_LAUNCH_FIFO8_UNC_OR_PARITY)),
+/*41*/ FLAG_ENTRY0("TxCreditReturnParityErr", SEES(TX_CREDIT_RETURN_PARITY)),
+/*42*/ FLAG_ENTRY0("TxSbHdrUncErr", SEES(TX_SB_HDR_UNC)),
+/*43*/ FLAG_ENTRY0("TxReadSdmaMemoryUncErr", SEES(TX_READ_SDMA_MEMORY_UNC)),
+/*44*/ FLAG_ENTRY0("TxReadPioMemoryUncErr", SEES(TX_READ_PIO_MEMORY_UNC)),
+/*45*/ FLAG_ENTRY0("TxEgressFifoUncErr", SEES(TX_EGRESS_FIFO_UNC)),
+/*46*/ FLAG_ENTRY0("TxHcrcInsertionErr", SEES(TX_HCRC_INSERTION)),
+/*47*/ FLAG_ENTRY0("TxCreditReturnVLErr", SEES(TX_CREDIT_RETURN_VL)),
+/*48*/ FLAG_ENTRY0("TxLaunchFifo0CorErr", SEES(TX_LAUNCH_FIFO0_COR)),
+/*49*/ FLAG_ENTRY0("TxLaunchFifo1CorErr", SEES(TX_LAUNCH_FIFO1_COR)),
+/*50*/ FLAG_ENTRY0("TxLaunchFifo2CorErr", SEES(TX_LAUNCH_FIFO2_COR)),
+/*51*/ FLAG_ENTRY0("TxLaunchFifo3CorErr", SEES(TX_LAUNCH_FIFO3_COR)),
+/*52*/ FLAG_ENTRY0("TxLaunchFifo4CorErr", SEES(TX_LAUNCH_FIFO4_COR)),
+/*53*/ FLAG_ENTRY0("TxLaunchFifo5CorErr", SEES(TX_LAUNCH_FIFO5_COR)),
+/*54*/ FLAG_ENTRY0("TxLaunchFifo6CorErr", SEES(TX_LAUNCH_FIFO6_COR)),
+/*55*/ FLAG_ENTRY0("TxLaunchFifo7CorErr", SEES(TX_LAUNCH_FIFO7_COR)),
+/*56*/ FLAG_ENTRY0("TxLaunchFifo8CorErr", SEES(TX_LAUNCH_FIFO8_COR)),
+/*57*/ FLAG_ENTRY0("TxCreditOverrunErr", SEES(TX_CREDIT_OVERRUN)),
+/*58*/ FLAG_ENTRY0("TxSbHdrCorErr", SEES(TX_SB_HDR_COR)),
+/*59*/ FLAG_ENTRY0("TxReadSdmaMemoryCorErr", SEES(TX_READ_SDMA_MEMORY_COR)),
+/*60*/ FLAG_ENTRY0("TxReadPioMemoryCorErr", SEES(TX_READ_PIO_MEMORY_COR)),
+/*61*/ FLAG_ENTRY0("TxEgressFifoCorErr", SEES(TX_EGRESS_FIFO_COR)),
+/*62*/ FLAG_ENTRY0("TxReadSdmaMemoryCsrUncErr",
+ SEES(TX_READ_SDMA_MEMORY_CSR_UNC)),
+/*63*/ FLAG_ENTRY0("TxReadPioMemoryCsrUncErr",
+ SEES(TX_READ_PIO_MEMORY_CSR_UNC)),
+};
+
+/*
+ * TXE Egress Error Info flags
+ */
+#define SEEI(text) SEND_EGRESS_ERR_INFO_##text##_ERR_SMASK
+static struct flag_table egress_err_info_flags[] = {
+/* 0*/ FLAG_ENTRY0("Reserved", 0ull),
+/* 1*/ FLAG_ENTRY0("VLErr", SEEI(VL)),
+/* 2*/ FLAG_ENTRY0("JobKeyErr", SEEI(JOB_KEY)),
+/* 3*/ FLAG_ENTRY0("JobKeyErr", SEEI(JOB_KEY)),
+/* 4*/ FLAG_ENTRY0("PartitionKeyErr", SEEI(PARTITION_KEY)),
+/* 5*/ FLAG_ENTRY0("SLIDErr", SEEI(SLID)),
+/* 6*/ FLAG_ENTRY0("OpcodeErr", SEEI(OPCODE)),
+/* 7*/ FLAG_ENTRY0("VLMappingErr", SEEI(VL_MAPPING)),
+/* 8*/ FLAG_ENTRY0("RawErr", SEEI(RAW)),
+/* 9*/ FLAG_ENTRY0("RawIPv6Err", SEEI(RAW_IPV6)),
+/*10*/ FLAG_ENTRY0("GRHErr", SEEI(GRH)),
+/*11*/ FLAG_ENTRY0("BypassErr", SEEI(BYPASS)),
+/*12*/ FLAG_ENTRY0("KDETHPacketsErr", SEEI(KDETH_PACKETS)),
+/*13*/ FLAG_ENTRY0("NonKDETHPacketsErr", SEEI(NON_KDETH_PACKETS)),
+/*14*/ FLAG_ENTRY0("TooSmallIBPacketsErr", SEEI(TOO_SMALL_IB_PACKETS)),
+/*15*/ FLAG_ENTRY0("TooSmallBypassPacketsErr", SEEI(TOO_SMALL_BYPASS_PACKETS)),
+/*16*/ FLAG_ENTRY0("PbcTestErr", SEEI(PBC_TEST)),
+/*17*/ FLAG_ENTRY0("BadPktLenErr", SEEI(BAD_PKT_LEN)),
+/*18*/ FLAG_ENTRY0("TooLongIBPacketErr", SEEI(TOO_LONG_IB_PACKET)),
+/*19*/ FLAG_ENTRY0("TooLongBypassPacketsErr", SEEI(TOO_LONG_BYPASS_PACKETS)),
+/*20*/ FLAG_ENTRY0("PbcStaticRateControlErr", SEEI(PBC_STATIC_RATE_CONTROL)),
+/*21*/ FLAG_ENTRY0("BypassBadPktLenErr", SEEI(BAD_PKT_LEN)),
+};
+
+/* TXE Egress errors that cause an SPC freeze */
+#define ALL_TXE_EGRESS_FREEZE_ERR \
+ (SEES(TX_EGRESS_FIFO_UNDERRUN_OR_PARITY) \
+ | SEES(TX_PIO_LAUNCH_INTF_PARITY) \
+ | SEES(TX_SDMA_LAUNCH_INTF_PARITY) \
+ | SEES(TX_SBRD_CTL_STATE_MACHINE_PARITY) \
+ | SEES(TX_LAUNCH_CSR_PARITY) \
+ | SEES(TX_SBRD_CTL_CSR_PARITY) \
+ | SEES(TX_CONFIG_PARITY) \
+ | SEES(TX_LAUNCH_FIFO0_UNC_OR_PARITY) \
+ | SEES(TX_LAUNCH_FIFO1_UNC_OR_PARITY) \
+ | SEES(TX_LAUNCH_FIFO2_UNC_OR_PARITY) \
+ | SEES(TX_LAUNCH_FIFO3_UNC_OR_PARITY) \
+ | SEES(TX_LAUNCH_FIFO4_UNC_OR_PARITY) \
+ | SEES(TX_LAUNCH_FIFO5_UNC_OR_PARITY) \
+ | SEES(TX_LAUNCH_FIFO6_UNC_OR_PARITY) \
+ | SEES(TX_LAUNCH_FIFO7_UNC_OR_PARITY) \
+ | SEES(TX_LAUNCH_FIFO8_UNC_OR_PARITY) \
+ | SEES(TX_CREDIT_RETURN_PARITY))
+
+/*
+ * TXE Send error flags
+ */
+#define SES(name) SEND_ERR_STATUS_SEND_##name##_ERR_SMASK
+static struct flag_table send_err_status_flags[] = {
+/* 0*/ FLAG_ENTRY0("SDmaRpyTagErr", SES(CSR_PARITY)),
+/* 1*/ FLAG_ENTRY0("SendCsrReadBadAddrErr", SES(CSR_READ_BAD_ADDR)),
+/* 2*/ FLAG_ENTRY0("SendCsrWriteBadAddrErr", SES(CSR_WRITE_BAD_ADDR))
+};
+
+/*
+ * TXE Send Context Error flags and consequences
+ */
+static struct flag_table sc_err_status_flags[] = {
+/* 0*/ FLAG_ENTRY("InconsistentSop",
+ SEC_PACKET_DROPPED | SEC_SC_HALTED,
+ SEND_CTXT_ERR_STATUS_PIO_INCONSISTENT_SOP_ERR_SMASK),
+/* 1*/ FLAG_ENTRY("DisallowedPacket",
+ SEC_PACKET_DROPPED | SEC_SC_HALTED,
+ SEND_CTXT_ERR_STATUS_PIO_DISALLOWED_PACKET_ERR_SMASK),
+/* 2*/ FLAG_ENTRY("WriteCrossesBoundary",
+ SEC_WRITE_DROPPED | SEC_SC_HALTED,
+ SEND_CTXT_ERR_STATUS_PIO_WRITE_CROSSES_BOUNDARY_ERR_SMASK),
+/* 3*/ FLAG_ENTRY("WriteOverflow",
+ SEC_WRITE_DROPPED | SEC_SC_HALTED,
+ SEND_CTXT_ERR_STATUS_PIO_WRITE_OVERFLOW_ERR_SMASK),
+/* 4*/ FLAG_ENTRY("WriteOutOfBounds",
+ SEC_WRITE_DROPPED | SEC_SC_HALTED,
+ SEND_CTXT_ERR_STATUS_PIO_WRITE_OUT_OF_BOUNDS_ERR_SMASK),
+/* 5-63 reserved*/
+};
+
+/*
+ * RXE Receive Error flags
+ */
+#define RXES(name) RCV_ERR_STATUS_RX_##name##_ERR_SMASK
+static struct flag_table rxe_err_status_flags[] = {
+/* 0*/ FLAG_ENTRY0("RxDmaCsrCorErr", RXES(DMA_CSR_COR)),
+/* 1*/ FLAG_ENTRY0("RxDcIntfParityErr", RXES(DC_INTF_PARITY)),
+/* 2*/ FLAG_ENTRY0("RxRcvHdrUncErr", RXES(RCV_HDR_UNC)),
+/* 3*/ FLAG_ENTRY0("RxRcvHdrCorErr", RXES(RCV_HDR_COR)),
+/* 4*/ FLAG_ENTRY0("RxRcvDataUncErr", RXES(RCV_DATA_UNC)),
+/* 5*/ FLAG_ENTRY0("RxRcvDataCorErr", RXES(RCV_DATA_COR)),
+/* 6*/ FLAG_ENTRY0("RxRcvQpMapTableUncErr", RXES(RCV_QP_MAP_TABLE_UNC)),
+/* 7*/ FLAG_ENTRY0("RxRcvQpMapTableCorErr", RXES(RCV_QP_MAP_TABLE_COR)),
+/* 8*/ FLAG_ENTRY0("RxRcvCsrParityErr", RXES(RCV_CSR_PARITY)),
+/* 9*/ FLAG_ENTRY0("RxDcSopEopParityErr", RXES(DC_SOP_EOP_PARITY)),
+/*10*/ FLAG_ENTRY0("RxDmaFlagUncErr", RXES(DMA_FLAG_UNC)),
+/*11*/ FLAG_ENTRY0("RxDmaFlagCorErr", RXES(DMA_FLAG_COR)),
+/*12*/ FLAG_ENTRY0("RxRcvFsmEncodingErr", RXES(RCV_FSM_ENCODING)),
+/*13*/ FLAG_ENTRY0("RxRbufFreeListUncErr", RXES(RBUF_FREE_LIST_UNC)),
+/*14*/ FLAG_ENTRY0("RxRbufFreeListCorErr", RXES(RBUF_FREE_LIST_COR)),
+/*15*/ FLAG_ENTRY0("RxRbufLookupDesRegUncErr", RXES(RBUF_LOOKUP_DES_REG_UNC)),
+/*16*/ FLAG_ENTRY0("RxRbufLookupDesRegUncCorErr",
+ RXES(RBUF_LOOKUP_DES_REG_UNC_COR)),
+/*17*/ FLAG_ENTRY0("RxRbufLookupDesUncErr", RXES(RBUF_LOOKUP_DES_UNC)),
+/*18*/ FLAG_ENTRY0("RxRbufLookupDesCorErr", RXES(RBUF_LOOKUP_DES_COR)),
+/*19*/ FLAG_ENTRY0("RxRbufBlockListReadUncErr",
+ RXES(RBUF_BLOCK_LIST_READ_UNC)),
+/*20*/ FLAG_ENTRY0("RxRbufBlockListReadCorErr",
+ RXES(RBUF_BLOCK_LIST_READ_COR)),
+/*21*/ FLAG_ENTRY0("RxRbufCsrQHeadBufNumParityErr",
+ RXES(RBUF_CSR_QHEAD_BUF_NUM_PARITY)),
+/*22*/ FLAG_ENTRY0("RxRbufCsrQEntCntParityErr",
+ RXES(RBUF_CSR_QENT_CNT_PARITY)),
+/*23*/ FLAG_ENTRY0("RxRbufCsrQNextBufParityErr",
+ RXES(RBUF_CSR_QNEXT_BUF_PARITY)),
+/*24*/ FLAG_ENTRY0("RxRbufCsrQVldBitParityErr",
+ RXES(RBUF_CSR_QVLD_BIT_PARITY)),
+/*25*/ FLAG_ENTRY0("RxRbufCsrQHdPtrParityErr", RXES(RBUF_CSR_QHD_PTR_PARITY)),
+/*26*/ FLAG_ENTRY0("RxRbufCsrQTlPtrParityErr", RXES(RBUF_CSR_QTL_PTR_PARITY)),
+/*27*/ FLAG_ENTRY0("RxRbufCsrQNumOfPktParityErr",
+ RXES(RBUF_CSR_QNUM_OF_PKT_PARITY)),
+/*28*/ FLAG_ENTRY0("RxRbufCsrQEOPDWParityErr", RXES(RBUF_CSR_QEOPDW_PARITY)),
+/*29*/ FLAG_ENTRY0("RxRbufCtxIdParityErr", RXES(RBUF_CTX_ID_PARITY)),
+/*30*/ FLAG_ENTRY0("RxRBufBadLookupErr", RXES(RBUF_BAD_LOOKUP)),
+/*31*/ FLAG_ENTRY0("RxRbufFullErr", RXES(RBUF_FULL)),
+/*32*/ FLAG_ENTRY0("RxRbufEmptyErr", RXES(RBUF_EMPTY)),
+/*33*/ FLAG_ENTRY0("RxRbufFlRdAddrParityErr", RXES(RBUF_FL_RD_ADDR_PARITY)),
+/*34*/ FLAG_ENTRY0("RxRbufFlWrAddrParityErr", RXES(RBUF_FL_WR_ADDR_PARITY)),
+/*35*/ FLAG_ENTRY0("RxRbufFlInitdoneParityErr",
+ RXES(RBUF_FL_INITDONE_PARITY)),
+/*36*/ FLAG_ENTRY0("RxRbufFlInitWrAddrParityErr",
+ RXES(RBUF_FL_INIT_WR_ADDR_PARITY)),
+/*37*/ FLAG_ENTRY0("RxRbufNextFreeBufUncErr", RXES(RBUF_NEXT_FREE_BUF_UNC)),
+/*38*/ FLAG_ENTRY0("RxRbufNextFreeBufCorErr", RXES(RBUF_NEXT_FREE_BUF_COR)),
+/*39*/ FLAG_ENTRY0("RxLookupDesPart1UncErr", RXES(LOOKUP_DES_PART1_UNC)),
+/*40*/ FLAG_ENTRY0("RxLookupDesPart1UncCorErr",
+ RXES(LOOKUP_DES_PART1_UNC_COR)),
+/*41*/ FLAG_ENTRY0("RxLookupDesPart2ParityErr",
+ RXES(LOOKUP_DES_PART2_PARITY)),
+/*42*/ FLAG_ENTRY0("RxLookupRcvArrayUncErr", RXES(LOOKUP_RCV_ARRAY_UNC)),
+/*43*/ FLAG_ENTRY0("RxLookupRcvArrayCorErr", RXES(LOOKUP_RCV_ARRAY_COR)),
+/*44*/ FLAG_ENTRY0("RxLookupCsrParityErr", RXES(LOOKUP_CSR_PARITY)),
+/*45*/ FLAG_ENTRY0("RxHqIntrCsrParityErr", RXES(HQ_INTR_CSR_PARITY)),
+/*46*/ FLAG_ENTRY0("RxHqIntrFsmErr", RXES(HQ_INTR_FSM)),
+/*47*/ FLAG_ENTRY0("RxRbufDescPart1UncErr", RXES(RBUF_DESC_PART1_UNC)),
+/*48*/ FLAG_ENTRY0("RxRbufDescPart1CorErr", RXES(RBUF_DESC_PART1_COR)),
+/*49*/ FLAG_ENTRY0("RxRbufDescPart2UncErr", RXES(RBUF_DESC_PART2_UNC)),
+/*50*/ FLAG_ENTRY0("RxRbufDescPart2CorErr", RXES(RBUF_DESC_PART2_COR)),
+/*51*/ FLAG_ENTRY0("RxDmaHdrFifoRdUncErr", RXES(DMA_HDR_FIFO_RD_UNC)),
+/*52*/ FLAG_ENTRY0("RxDmaHdrFifoRdCorErr", RXES(DMA_HDR_FIFO_RD_COR)),
+/*53*/ FLAG_ENTRY0("RxDmaDataFifoRdUncErr", RXES(DMA_DATA_FIFO_RD_UNC)),
+/*54*/ FLAG_ENTRY0("RxDmaDataFifoRdCorErr", RXES(DMA_DATA_FIFO_RD_COR)),
+/*55*/ FLAG_ENTRY0("RxRbufDataUncErr", RXES(RBUF_DATA_UNC)),
+/*56*/ FLAG_ENTRY0("RxRbufDataCorErr", RXES(RBUF_DATA_COR)),
+/*57*/ FLAG_ENTRY0("RxDmaCsrParityErr", RXES(DMA_CSR_PARITY)),
+/*58*/ FLAG_ENTRY0("RxDmaEqFsmEncodingErr", RXES(DMA_EQ_FSM_ENCODING)),
+/*59*/ FLAG_ENTRY0("RxDmaDqFsmEncodingErr", RXES(DMA_DQ_FSM_ENCODING)),
+/*60*/ FLAG_ENTRY0("RxDmaCsrUncErr", RXES(DMA_CSR_UNC)),
+/*61*/ FLAG_ENTRY0("RxCsrReadBadAddrErr", RXES(CSR_READ_BAD_ADDR)),
+/*62*/ FLAG_ENTRY0("RxCsrWriteBadAddrErr", RXES(CSR_WRITE_BAD_ADDR)),
+/*63*/ FLAG_ENTRY0("RxCsrParityErr", RXES(CSR_PARITY))
+};
+
+/* RXE errors that will trigger an SPC freeze */
+#define ALL_RXE_FREEZE_ERR \
+ (RCV_ERR_STATUS_RX_RCV_QP_MAP_TABLE_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RCV_CSR_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_DMA_FLAG_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RCV_FSM_ENCODING_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_FREE_LIST_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_LOOKUP_DES_REG_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_LOOKUP_DES_REG_UNC_COR_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_LOOKUP_DES_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_BLOCK_LIST_READ_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_CSR_QHEAD_BUF_NUM_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_CSR_QENT_CNT_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_CSR_QNEXT_BUF_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_CSR_QVLD_BIT_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_CSR_QHD_PTR_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_CSR_QTL_PTR_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_CSR_QNUM_OF_PKT_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_CSR_QEOPDW_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_CTX_ID_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_BAD_LOOKUP_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_FULL_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_EMPTY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_FL_RD_ADDR_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_FL_WR_ADDR_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_FL_INITDONE_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_FL_INIT_WR_ADDR_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_NEXT_FREE_BUF_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_LOOKUP_DES_PART1_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_LOOKUP_DES_PART1_UNC_COR_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_LOOKUP_DES_PART2_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_LOOKUP_RCV_ARRAY_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_LOOKUP_CSR_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_HQ_INTR_CSR_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_HQ_INTR_FSM_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_DESC_PART1_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_DESC_PART1_COR_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_DESC_PART2_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_DMA_HDR_FIFO_RD_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_DMA_DATA_FIFO_RD_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_RBUF_DATA_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_DMA_CSR_PARITY_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_DMA_EQ_FSM_ENCODING_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_DMA_DQ_FSM_ENCODING_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_DMA_CSR_UNC_ERR_SMASK \
+ | RCV_ERR_STATUS_RX_CSR_PARITY_ERR_SMASK)
+
+#define RXE_FREEZE_ABORT_MASK \
+ (RCV_ERR_STATUS_RX_DMA_CSR_UNC_ERR_SMASK | \
+ RCV_ERR_STATUS_RX_DMA_HDR_FIFO_RD_UNC_ERR_SMASK | \
+ RCV_ERR_STATUS_RX_DMA_DATA_FIFO_RD_UNC_ERR_SMASK)
+
+/*
+ * DCC Error Flags
+ */
+#define DCCE(name) DCC_ERR_FLG_##name##_SMASK
+static struct flag_table dcc_err_flags[] = {
+ FLAG_ENTRY0("bad_l2_err", DCCE(BAD_L2_ERR)),
+ FLAG_ENTRY0("bad_sc_err", DCCE(BAD_SC_ERR)),
+ FLAG_ENTRY0("bad_mid_tail_err", DCCE(BAD_MID_TAIL_ERR)),
+ FLAG_ENTRY0("bad_preemption_err", DCCE(BAD_PREEMPTION_ERR)),
+ FLAG_ENTRY0("preemption_err", DCCE(PREEMPTION_ERR)),
+ FLAG_ENTRY0("preemptionvl15_err", DCCE(PREEMPTIONVL15_ERR)),
+ FLAG_ENTRY0("bad_vl_marker_err", DCCE(BAD_VL_MARKER_ERR)),
+ FLAG_ENTRY0("bad_dlid_target_err", DCCE(BAD_DLID_TARGET_ERR)),
+ FLAG_ENTRY0("bad_lver_err", DCCE(BAD_LVER_ERR)),
+ FLAG_ENTRY0("uncorrectable_err", DCCE(UNCORRECTABLE_ERR)),
+ FLAG_ENTRY0("bad_crdt_ack_err", DCCE(BAD_CRDT_ACK_ERR)),
+ FLAG_ENTRY0("unsup_pkt_type", DCCE(UNSUP_PKT_TYPE)),
+ FLAG_ENTRY0("bad_ctrl_flit_err", DCCE(BAD_CTRL_FLIT_ERR)),
+ FLAG_ENTRY0("event_cntr_parity_err", DCCE(EVENT_CNTR_PARITY_ERR)),
+ FLAG_ENTRY0("event_cntr_rollover_err", DCCE(EVENT_CNTR_ROLLOVER_ERR)),
+ FLAG_ENTRY0("link_err", DCCE(LINK_ERR)),
+ FLAG_ENTRY0("misc_cntr_rollover_err", DCCE(MISC_CNTR_ROLLOVER_ERR)),
+ FLAG_ENTRY0("bad_ctrl_dist_err", DCCE(BAD_CTRL_DIST_ERR)),
+ FLAG_ENTRY0("bad_tail_dist_err", DCCE(BAD_TAIL_DIST_ERR)),
+ FLAG_ENTRY0("bad_head_dist_err", DCCE(BAD_HEAD_DIST_ERR)),
+ FLAG_ENTRY0("nonvl15_state_err", DCCE(NONVL15_STATE_ERR)),
+ FLAG_ENTRY0("vl15_multi_err", DCCE(VL15_MULTI_ERR)),
+ FLAG_ENTRY0("bad_pkt_length_err", DCCE(BAD_PKT_LENGTH_ERR)),
+ FLAG_ENTRY0("unsup_vl_err", DCCE(UNSUP_VL_ERR)),
+ FLAG_ENTRY0("perm_nvl15_err", DCCE(PERM_NVL15_ERR)),
+ FLAG_ENTRY0("slid_zero_err", DCCE(SLID_ZERO_ERR)),
+ FLAG_ENTRY0("dlid_zero_err", DCCE(DLID_ZERO_ERR)),
+ FLAG_ENTRY0("length_mtu_err", DCCE(LENGTH_MTU_ERR)),
+ FLAG_ENTRY0("rx_early_drop_err", DCCE(RX_EARLY_DROP_ERR)),
+ FLAG_ENTRY0("late_short_err", DCCE(LATE_SHORT_ERR)),
+ FLAG_ENTRY0("late_long_err", DCCE(LATE_LONG_ERR)),
+ FLAG_ENTRY0("late_ebp_err", DCCE(LATE_EBP_ERR)),
+ FLAG_ENTRY0("fpe_tx_fifo_ovflw_err", DCCE(FPE_TX_FIFO_OVFLW_ERR)),
+ FLAG_ENTRY0("fpe_tx_fifo_unflw_err", DCCE(FPE_TX_FIFO_UNFLW_ERR)),
+ FLAG_ENTRY0("csr_access_blocked_host", DCCE(CSR_ACCESS_BLOCKED_HOST)),
+ FLAG_ENTRY0("csr_access_blocked_uc", DCCE(CSR_ACCESS_BLOCKED_UC)),
+ FLAG_ENTRY0("tx_ctrl_parity_err", DCCE(TX_CTRL_PARITY_ERR)),
+ FLAG_ENTRY0("tx_ctrl_parity_mbe_err", DCCE(TX_CTRL_PARITY_MBE_ERR)),
+ FLAG_ENTRY0("tx_sc_parity_err", DCCE(TX_SC_PARITY_ERR)),
+ FLAG_ENTRY0("rx_ctrl_parity_mbe_err", DCCE(RX_CTRL_PARITY_MBE_ERR)),
+ FLAG_ENTRY0("csr_parity_err", DCCE(CSR_PARITY_ERR)),
+ FLAG_ENTRY0("csr_inval_addr", DCCE(CSR_INVAL_ADDR)),
+ FLAG_ENTRY0("tx_byte_shft_parity_err", DCCE(TX_BYTE_SHFT_PARITY_ERR)),
+ FLAG_ENTRY0("rx_byte_shft_parity_err", DCCE(RX_BYTE_SHFT_PARITY_ERR)),
+ FLAG_ENTRY0("fmconfig_err", DCCE(FMCONFIG_ERR)),
+ FLAG_ENTRY0("rcvport_err", DCCE(RCVPORT_ERR)),
+};
+
+/*
+ * LCB error flags
+ */
+#define LCBE(name) DC_LCB_ERR_FLG_##name##_SMASK
+static struct flag_table lcb_err_flags[] = {
+/* 0*/ FLAG_ENTRY0("CSR_PARITY_ERR", LCBE(CSR_PARITY_ERR)),
+/* 1*/ FLAG_ENTRY0("INVALID_CSR_ADDR", LCBE(INVALID_CSR_ADDR)),
+/* 2*/ FLAG_ENTRY0("RST_FOR_FAILED_DESKEW", LCBE(RST_FOR_FAILED_DESKEW)),
+/* 3*/ FLAG_ENTRY0("ALL_LNS_FAILED_REINIT_TEST",
+ LCBE(ALL_LNS_FAILED_REINIT_TEST)),
+/* 4*/ FLAG_ENTRY0("LOST_REINIT_STALL_OR_TOS", LCBE(LOST_REINIT_STALL_OR_TOS)),
+/* 5*/ FLAG_ENTRY0("TX_LESS_THAN_FOUR_LNS", LCBE(TX_LESS_THAN_FOUR_LNS)),
+/* 6*/ FLAG_ENTRY0("RX_LESS_THAN_FOUR_LNS", LCBE(RX_LESS_THAN_FOUR_LNS)),
+/* 7*/ FLAG_ENTRY0("SEQ_CRC_ERR", LCBE(SEQ_CRC_ERR)),
+/* 8*/ FLAG_ENTRY0("REINIT_FROM_PEER", LCBE(REINIT_FROM_PEER)),
+/* 9*/ FLAG_ENTRY0("REINIT_FOR_LN_DEGRADE", LCBE(REINIT_FOR_LN_DEGRADE)),
+/*10*/ FLAG_ENTRY0("CRC_ERR_CNT_HIT_LIMIT", LCBE(CRC_ERR_CNT_HIT_LIMIT)),
+/*11*/ FLAG_ENTRY0("RCLK_STOPPED", LCBE(RCLK_STOPPED)),
+/*12*/ FLAG_ENTRY0("UNEXPECTED_REPLAY_MARKER", LCBE(UNEXPECTED_REPLAY_MARKER)),
+/*13*/ FLAG_ENTRY0("UNEXPECTED_ROUND_TRIP_MARKER",
+ LCBE(UNEXPECTED_ROUND_TRIP_MARKER)),
+/*14*/ FLAG_ENTRY0("ILLEGAL_NULL_LTP", LCBE(ILLEGAL_NULL_LTP)),
+/*15*/ FLAG_ENTRY0("ILLEGAL_FLIT_ENCODING", LCBE(ILLEGAL_FLIT_ENCODING)),
+/*16*/ FLAG_ENTRY0("FLIT_INPUT_BUF_OFLW", LCBE(FLIT_INPUT_BUF_OFLW)),
+/*17*/ FLAG_ENTRY0("VL_ACK_INPUT_BUF_OFLW", LCBE(VL_ACK_INPUT_BUF_OFLW)),
+/*18*/ FLAG_ENTRY0("VL_ACK_INPUT_PARITY_ERR", LCBE(VL_ACK_INPUT_PARITY_ERR)),
+/*19*/ FLAG_ENTRY0("VL_ACK_INPUT_WRONG_CRC_MODE",
+ LCBE(VL_ACK_INPUT_WRONG_CRC_MODE)),
+/*20*/ FLAG_ENTRY0("FLIT_INPUT_BUF_MBE", LCBE(FLIT_INPUT_BUF_MBE)),
+/*21*/ FLAG_ENTRY0("FLIT_INPUT_BUF_SBE", LCBE(FLIT_INPUT_BUF_SBE)),
+/*22*/ FLAG_ENTRY0("REPLAY_BUF_MBE", LCBE(REPLAY_BUF_MBE)),
+/*23*/ FLAG_ENTRY0("REPLAY_BUF_SBE", LCBE(REPLAY_BUF_SBE)),
+/*24*/ FLAG_ENTRY0("CREDIT_RETURN_FLIT_MBE", LCBE(CREDIT_RETURN_FLIT_MBE)),
+/*25*/ FLAG_ENTRY0("RST_FOR_LINK_TIMEOUT", LCBE(RST_FOR_LINK_TIMEOUT)),
+/*26*/ FLAG_ENTRY0("RST_FOR_INCOMPLT_RND_TRIP",
+ LCBE(RST_FOR_INCOMPLT_RND_TRIP)),
+/*27*/ FLAG_ENTRY0("HOLD_REINIT", LCBE(HOLD_REINIT)),
+/*28*/ FLAG_ENTRY0("NEG_EDGE_LINK_TRANSFER_ACTIVE",
+ LCBE(NEG_EDGE_LINK_TRANSFER_ACTIVE)),
+/*29*/ FLAG_ENTRY0("REDUNDANT_FLIT_PARITY_ERR",
+ LCBE(REDUNDANT_FLIT_PARITY_ERR))
+};
+
+/*
+ * DC8051 Error Flags
+ */
+#define D8E(name) DC_DC8051_ERR_FLG_##name##_SMASK
+static struct flag_table dc8051_err_flags[] = {
+ FLAG_ENTRY0("SET_BY_8051", D8E(SET_BY_8051)),
+ FLAG_ENTRY0("LOST_8051_HEART_BEAT", D8E(LOST_8051_HEART_BEAT)),
+ FLAG_ENTRY0("CRAM_MBE", D8E(CRAM_MBE)),
+ FLAG_ENTRY0("CRAM_SBE", D8E(CRAM_SBE)),
+ FLAG_ENTRY0("DRAM_MBE", D8E(DRAM_MBE)),
+ FLAG_ENTRY0("DRAM_SBE", D8E(DRAM_SBE)),
+ FLAG_ENTRY0("IRAM_MBE", D8E(IRAM_MBE)),
+ FLAG_ENTRY0("IRAM_SBE", D8E(IRAM_SBE)),
+ FLAG_ENTRY0("UNMATCHED_SECURE_MSG_ACROSS_BCC_LANES",
+ D8E(UNMATCHED_SECURE_MSG_ACROSS_BCC_LANES)),
+ FLAG_ENTRY0("INVALID_CSR_ADDR", D8E(INVALID_CSR_ADDR)),
+};
+
+/*
+ * DC8051 Information Error flags
+ *
+ * Flags in DC8051_DBG_ERR_INFO_SET_BY_8051.ERROR field.
+ */
+static struct flag_table dc8051_info_err_flags[] = {
+ FLAG_ENTRY0("Spico ROM check failed", SPICO_ROM_FAILED),
+ FLAG_ENTRY0("Unknown frame received", UNKNOWN_FRAME),
+ FLAG_ENTRY0("Target BER not met", TARGET_BER_NOT_MET),
+ FLAG_ENTRY0("Serdes internal loopback failure",
+ FAILED_SERDES_INTERNAL_LOOPBACK),
+ FLAG_ENTRY0("Failed SerDes init", FAILED_SERDES_INIT),
+ FLAG_ENTRY0("Failed LNI(Polling)", FAILED_LNI_POLLING),
+ FLAG_ENTRY0("Failed LNI(Debounce)", FAILED_LNI_DEBOUNCE),
+ FLAG_ENTRY0("Failed LNI(EstbComm)", FAILED_LNI_ESTBCOMM),
+ FLAG_ENTRY0("Failed LNI(OptEq)", FAILED_LNI_OPTEQ),
+ FLAG_ENTRY0("Failed LNI(VerifyCap_1)", FAILED_LNI_VERIFY_CAP1),
+ FLAG_ENTRY0("Failed LNI(VerifyCap_2)", FAILED_LNI_VERIFY_CAP2),
+ FLAG_ENTRY0("Failed LNI(ConfigLT)", FAILED_LNI_CONFIGLT)
+};
+
+/*
+ * DC8051 Information Host Information flags
+ *
+ * Flags in DC8051_DBG_ERR_INFO_SET_BY_8051.HOST_MSG field.
+ */
+static struct flag_table dc8051_info_host_msg_flags[] = {
+ FLAG_ENTRY0("Host request done", 0x0001),
+ FLAG_ENTRY0("BC SMA message", 0x0002),
+ FLAG_ENTRY0("BC PWR_MGM message", 0x0004),
+ FLAG_ENTRY0("BC Unknown message (BCC)", 0x0008),
+ FLAG_ENTRY0("BC Unknown message (LCB)", 0x0010),
+ FLAG_ENTRY0("External device config request", 0x0020),
+ FLAG_ENTRY0("VerifyCap all frames received", 0x0040),
+ FLAG_ENTRY0("LinkUp achieved", 0x0080),
+ FLAG_ENTRY0("Link going down", 0x0100),
+};
+
+
+static u32 encoded_size(u32 size);
+static u32 chip_to_opa_lstate(struct hfi1_devdata *dd, u32 chip_lstate);
+static int set_physical_link_state(struct hfi1_devdata *dd, u64 state);
+static void read_vc_remote_phy(struct hfi1_devdata *dd, u8 *power_management,
+ u8 *continuous);
+static void read_vc_remote_fabric(struct hfi1_devdata *dd, u8 *vau, u8 *z,
+ u8 *vcu, u16 *vl15buf, u8 *crc_sizes);
+static void read_vc_remote_link_width(struct hfi1_devdata *dd,
+ u8 *remote_tx_rate, u16 *link_widths);
+static void read_vc_local_link_width(struct hfi1_devdata *dd, u8 *misc_bits,
+ u8 *flag_bits, u16 *link_widths);
+static void read_remote_device_id(struct hfi1_devdata *dd, u16 *device_id,
+ u8 *device_rev);
+static void read_mgmt_allowed(struct hfi1_devdata *dd, u8 *mgmt_allowed);
+static void read_local_lni(struct hfi1_devdata *dd, u8 *enable_lane_rx);
+static int read_tx_settings(struct hfi1_devdata *dd, u8 *enable_lane_tx,
+ u8 *tx_polarity_inversion,
+ u8 *rx_polarity_inversion, u8 *max_rate);
+static void handle_sdma_eng_err(struct hfi1_devdata *dd,
+ unsigned int context, u64 err_status);
+static void handle_qsfp_int(struct hfi1_devdata *dd, u32 source, u64 reg);
+static void handle_dcc_err(struct hfi1_devdata *dd,
+ unsigned int context, u64 err_status);
+static void handle_lcb_err(struct hfi1_devdata *dd,
+ unsigned int context, u64 err_status);
+static void handle_8051_interrupt(struct hfi1_devdata *dd, u32 unused, u64 reg);
+static void handle_cce_err(struct hfi1_devdata *dd, u32 unused, u64 reg);
+static void handle_rxe_err(struct hfi1_devdata *dd, u32 unused, u64 reg);
+static void handle_misc_err(struct hfi1_devdata *dd, u32 unused, u64 reg);
+static void handle_pio_err(struct hfi1_devdata *dd, u32 unused, u64 reg);
+static void handle_sdma_err(struct hfi1_devdata *dd, u32 unused, u64 reg);
+static void handle_egress_err(struct hfi1_devdata *dd, u32 unused, u64 reg);
+static void handle_txe_err(struct hfi1_devdata *dd, u32 unused, u64 reg);
+static void set_partition_keys(struct hfi1_pportdata *);
+static const char *link_state_name(u32 state);
+static const char *link_state_reason_name(struct hfi1_pportdata *ppd,
+ u32 state);
+static int do_8051_command(struct hfi1_devdata *dd, u32 type, u64 in_data,
+ u64 *out_data);
+static int read_idle_sma(struct hfi1_devdata *dd, u64 *data);
+static int thermal_init(struct hfi1_devdata *dd);
+
+static int wait_logical_linkstate(struct hfi1_pportdata *ppd, u32 state,
+ int msecs);
+static void read_planned_down_reason_code(struct hfi1_devdata *dd, u8 *pdrrc);
+static void handle_temp_err(struct hfi1_devdata *);
+static void dc_shutdown(struct hfi1_devdata *);
+static void dc_start(struct hfi1_devdata *);
+
+/*
+ * Error interrupt table entry. This is used as input to the interrupt
+ * "clear down" routine used for all second tier error interrupt register.
+ * Second tier interrupt registers have a single bit representing them
+ * in the top-level CceIntStatus.
+ */
+struct err_reg_info {
+ u32 status; /* status CSR offset */
+ u32 clear; /* clear CSR offset */
+ u32 mask; /* mask CSR offset */
+ void (*handler)(struct hfi1_devdata *dd, u32 source, u64 reg);
+ const char *desc;
+};
+
+#define NUM_MISC_ERRS (IS_GENERAL_ERR_END - IS_GENERAL_ERR_START)
+#define NUM_DC_ERRS (IS_DC_END - IS_DC_START)
+#define NUM_VARIOUS (IS_VARIOUS_END - IS_VARIOUS_START)
+
+/*
+ * Helpers for building HFI and DC error interrupt table entries. Different
+ * helpers are needed because of inconsistent register names.
+ */
+#define EE(reg, handler, desc) \
+ { reg##_STATUS, reg##_CLEAR, reg##_MASK, \
+ handler, desc }
+#define DC_EE1(reg, handler, desc) \
+ { reg##_FLG, reg##_FLG_CLR, reg##_FLG_EN, handler, desc }
+#define DC_EE2(reg, handler, desc) \
+ { reg##_FLG, reg##_CLR, reg##_EN, handler, desc }
+
+/*
+ * Table of the "misc" grouping of error interrupts. Each entry refers to
+ * another register containing more information.
+ */
+static const struct err_reg_info misc_errs[NUM_MISC_ERRS] = {
+/* 0*/ EE(CCE_ERR, handle_cce_err, "CceErr"),
+/* 1*/ EE(RCV_ERR, handle_rxe_err, "RxeErr"),
+/* 2*/ EE(MISC_ERR, handle_misc_err, "MiscErr"),
+/* 3*/ { 0, 0, 0, NULL }, /* reserved */
+/* 4*/ EE(SEND_PIO_ERR, handle_pio_err, "PioErr"),
+/* 5*/ EE(SEND_DMA_ERR, handle_sdma_err, "SDmaErr"),
+/* 6*/ EE(SEND_EGRESS_ERR, handle_egress_err, "EgressErr"),
+/* 7*/ EE(SEND_ERR, handle_txe_err, "TxeErr")
+ /* the rest are reserved */
+};
+
+/*
+ * Index into the Various section of the interrupt sources
+ * corresponding to the Critical Temperature interrupt.
+ */
+#define TCRIT_INT_SOURCE 4
+
+/*
+ * SDMA error interrupt entry - refers to another register containing more
+ * information.
+ */
+static const struct err_reg_info sdma_eng_err =
+ EE(SEND_DMA_ENG_ERR, handle_sdma_eng_err, "SDmaEngErr");
+
+static const struct err_reg_info various_err[NUM_VARIOUS] = {
+/* 0*/ { 0, 0, 0, NULL }, /* PbcInt */
+/* 1*/ { 0, 0, 0, NULL }, /* GpioAssertInt */
+/* 2*/ EE(ASIC_QSFP1, handle_qsfp_int, "QSFP1"),
+/* 3*/ EE(ASIC_QSFP2, handle_qsfp_int, "QSFP2"),
+/* 4*/ { 0, 0, 0, NULL }, /* TCritInt */
+ /* rest are reserved */
+};
+
+/*
+ * The DC encoding of mtu_cap for 10K MTU in the DCC_CFG_PORT_CONFIG
+ * register can not be derived from the MTU value because 10K is not
+ * a power of 2. Therefore, we need a constant. Everything else can
+ * be calculated.
+ */
+#define DCC_CFG_PORT_MTU_CAP_10240 7
+
+/*
+ * Table of the DC grouping of error interrupts. Each entry refers to
+ * another register containing more information.
+ */
+static const struct err_reg_info dc_errs[NUM_DC_ERRS] = {
+/* 0*/ DC_EE1(DCC_ERR, handle_dcc_err, "DCC Err"),
+/* 1*/ DC_EE2(DC_LCB_ERR, handle_lcb_err, "LCB Err"),
+/* 2*/ DC_EE2(DC_DC8051_ERR, handle_8051_interrupt, "DC8051 Interrupt"),
+/* 3*/ /* dc_lbm_int - special, see is_dc_int() */
+ /* the rest are reserved */
+};
+
+struct cntr_entry {
+ /*
+ * counter name
+ */
+ char *name;
+
+ /*
+ * csr to read for name (if applicable)
+ */
+ u64 csr;
+
+ /*
+ * offset into dd or ppd to store the counter's value
+ */
+ int offset;
+
+ /*
+ * flags
+ */
+ u8 flags;
+
+ /*
+ * accessor for stat element, context either dd or ppd
+ */
+ u64 (*rw_cntr)(const struct cntr_entry *,
+ void *context,
+ int vl,
+ int mode,
+ u64 data);
+};
+
+#define C_RCV_HDR_OVF_FIRST C_RCV_HDR_OVF_0
+#define C_RCV_HDR_OVF_LAST C_RCV_HDR_OVF_159
+
+#define CNTR_ELEM(name, csr, offset, flags, accessor) \
+{ \
+ name, \
+ csr, \
+ offset, \
+ flags, \
+ accessor \
+}
+
+/* 32bit RXE */
+#define RXE32_PORT_CNTR_ELEM(name, counter, flags) \
+CNTR_ELEM(#name, \
+ (counter * 8 + RCV_COUNTER_ARRAY32), \
+ 0, flags | CNTR_32BIT, \
+ port_access_u32_csr)
+
+#define RXE32_DEV_CNTR_ELEM(name, counter, flags) \
+CNTR_ELEM(#name, \
+ (counter * 8 + RCV_COUNTER_ARRAY32), \
+ 0, flags | CNTR_32BIT, \
+ dev_access_u32_csr)
+
+/* 64bit RXE */
+#define RXE64_PORT_CNTR_ELEM(name, counter, flags) \
+CNTR_ELEM(#name, \
+ (counter * 8 + RCV_COUNTER_ARRAY64), \
+ 0, flags, \
+ port_access_u64_csr)
+
+#define RXE64_DEV_CNTR_ELEM(name, counter, flags) \
+CNTR_ELEM(#name, \
+ (counter * 8 + RCV_COUNTER_ARRAY64), \
+ 0, flags, \
+ dev_access_u64_csr)
+
+#define OVR_LBL(ctx) C_RCV_HDR_OVF_ ## ctx
+#define OVR_ELM(ctx) \
+CNTR_ELEM("RcvHdrOvr" #ctx, \
+ (RCV_HDR_OVFL_CNT + ctx*0x100), \
+ 0, CNTR_NORMAL, port_access_u64_csr)
+
+/* 32bit TXE */
+#define TXE32_PORT_CNTR_ELEM(name, counter, flags) \
+CNTR_ELEM(#name, \
+ (counter * 8 + SEND_COUNTER_ARRAY32), \
+ 0, flags | CNTR_32BIT, \
+ port_access_u32_csr)
+
+/* 64bit TXE */
+#define TXE64_PORT_CNTR_ELEM(name, counter, flags) \
+CNTR_ELEM(#name, \
+ (counter * 8 + SEND_COUNTER_ARRAY64), \
+ 0, flags, \
+ port_access_u64_csr)
+
+# define TX64_DEV_CNTR_ELEM(name, counter, flags) \
+CNTR_ELEM(#name,\
+ counter * 8 + SEND_COUNTER_ARRAY64, \
+ 0, \
+ flags, \
+ dev_access_u64_csr)
+
+/* CCE */
+#define CCE_PERF_DEV_CNTR_ELEM(name, counter, flags) \
+CNTR_ELEM(#name, \
+ (counter * 8 + CCE_COUNTER_ARRAY32), \
+ 0, flags | CNTR_32BIT, \
+ dev_access_u32_csr)
+
+#define CCE_INT_DEV_CNTR_ELEM(name, counter, flags) \
+CNTR_ELEM(#name, \
+ (counter * 8 + CCE_INT_COUNTER_ARRAY32), \
+ 0, flags | CNTR_32BIT, \
+ dev_access_u32_csr)
+
+/* DC */
+#define DC_PERF_CNTR(name, counter, flags) \
+CNTR_ELEM(#name, \
+ counter, \
+ 0, \
+ flags, \
+ dev_access_u64_csr)
+
+#define DC_PERF_CNTR_LCB(name, counter, flags) \
+CNTR_ELEM(#name, \
+ counter, \
+ 0, \
+ flags, \
+ dc_access_lcb_cntr)
+
+/* ibp counters */
+#define SW_IBP_CNTR(name, cntr) \
+CNTR_ELEM(#name, \
+ 0, \
+ 0, \
+ CNTR_SYNTH, \
+ access_ibp_##cntr)
+
+u64 read_csr(const struct hfi1_devdata *dd, u32 offset)
+{
+ u64 val;
+
+ if (dd->flags & HFI1_PRESENT) {
+ val = readq((void __iomem *)dd->kregbase + offset);
+ return val;
+ }
+ return -1;
+}
+
+void write_csr(const struct hfi1_devdata *dd, u32 offset, u64 value)
+{
+ if (dd->flags & HFI1_PRESENT)
+ writeq(value, (void __iomem *)dd->kregbase + offset);
+}
+
+void __iomem *get_csr_addr(
+ struct hfi1_devdata *dd,
+ u32 offset)
+{
+ return (void __iomem *)dd->kregbase + offset;
+}
+
+static inline u64 read_write_csr(const struct hfi1_devdata *dd, u32 csr,
+ int mode, u64 value)
+{
+ u64 ret;
+
+
+ if (mode == CNTR_MODE_R) {
+ ret = read_csr(dd, csr);
+ } else if (mode == CNTR_MODE_W) {
+ write_csr(dd, csr, value);
+ ret = value;
+ } else {
+ dd_dev_err(dd, "Invalid cntr register access mode");
+ return 0;
+ }
+
+ hfi1_cdbg(CNTR, "csr 0x%x val 0x%llx mode %d", csr, ret, mode);
+ return ret;
+}
+
+/* Dev Access */
+static u64 dev_access_u32_csr(const struct cntr_entry *entry,
+ void *context, int vl, int mode, u64 data)
+{
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)context;
+
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+ return read_write_csr(dd, entry->csr, mode, data);
+}
+
+static u64 dev_access_u64_csr(const struct cntr_entry *entry, void *context,
+ int vl, int mode, u64 data)
+{
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)context;
+
+ u64 val = 0;
+ u64 csr = entry->csr;
+
+ if (entry->flags & CNTR_VL) {
+ if (vl == CNTR_INVALID_VL)
+ return 0;
+ csr += 8 * vl;
+ } else {
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+ }
+
+ val = read_write_csr(dd, csr, mode, data);
+ return val;
+}
+
+static u64 dc_access_lcb_cntr(const struct cntr_entry *entry, void *context,
+ int vl, int mode, u64 data)
+{
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)context;
+ u32 csr = entry->csr;
+ int ret = 0;
+
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+ if (mode == CNTR_MODE_R)
+ ret = read_lcb_csr(dd, csr, &data);
+ else if (mode == CNTR_MODE_W)
+ ret = write_lcb_csr(dd, csr, data);
+
+ if (ret) {
+ dd_dev_err(dd, "Could not acquire LCB for counter 0x%x", csr);
+ return 0;
+ }
+
+ hfi1_cdbg(CNTR, "csr 0x%x val 0x%llx mode %d", csr, data, mode);
+ return data;
+}
+
+/* Port Access */
+static u64 port_access_u32_csr(const struct cntr_entry *entry, void *context,
+ int vl, int mode, u64 data)
+{
+ struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)context;
+
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+ return read_write_csr(ppd->dd, entry->csr, mode, data);
+}
+
+static u64 port_access_u64_csr(const struct cntr_entry *entry,
+ void *context, int vl, int mode, u64 data)
+{
+ struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)context;
+ u64 val;
+ u64 csr = entry->csr;
+
+ if (entry->flags & CNTR_VL) {
+ if (vl == CNTR_INVALID_VL)
+ return 0;
+ csr += 8 * vl;
+ } else {
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+ }
+ val = read_write_csr(ppd->dd, csr, mode, data);
+ return val;
+}
+
+/* Software defined */
+static inline u64 read_write_sw(struct hfi1_devdata *dd, u64 *cntr, int mode,
+ u64 data)
+{
+ u64 ret;
+
+ if (mode == CNTR_MODE_R) {
+ ret = *cntr;
+ } else if (mode == CNTR_MODE_W) {
+ *cntr = data;
+ ret = data;
+ } else {
+ dd_dev_err(dd, "Invalid cntr sw access mode");
+ return 0;
+ }
+
+ hfi1_cdbg(CNTR, "val 0x%llx mode %d", ret, mode);
+
+ return ret;
+}
+
+static u64 access_sw_link_dn_cnt(const struct cntr_entry *entry, void *context,
+ int vl, int mode, u64 data)
+{
+ struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)context;
+
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+ return read_write_sw(ppd->dd, &ppd->link_downed, mode, data);
+}
+
+static u64 access_sw_link_up_cnt(const struct cntr_entry *entry, void *context,
+ int vl, int mode, u64 data)
+{
+ struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)context;
+
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+ return read_write_sw(ppd->dd, &ppd->link_up, mode, data);
+}
+
+static u64 access_sw_xmit_discards(const struct cntr_entry *entry,
+ void *context, int vl, int mode, u64 data)
+{
+ struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)context;
+
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+
+ return read_write_sw(ppd->dd, &ppd->port_xmit_discards, mode, data);
+}
+
+static u64 access_xmit_constraint_errs(const struct cntr_entry *entry,
+ void *context, int vl, int mode, u64 data)
+{
+ struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)context;
+
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+
+ return read_write_sw(ppd->dd, &ppd->port_xmit_constraint_errors,
+ mode, data);
+}
+
+static u64 access_rcv_constraint_errs(const struct cntr_entry *entry,
+ void *context, int vl, int mode, u64 data)
+{
+ struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)context;
+
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+
+ return read_write_sw(ppd->dd, &ppd->port_rcv_constraint_errors,
+ mode, data);
+}
+
+u64 get_all_cpu_total(u64 __percpu *cntr)
+{
+ int cpu;
+ u64 counter = 0;
+
+ for_each_possible_cpu(cpu)
+ counter += *per_cpu_ptr(cntr, cpu);
+ return counter;
+}
+
+static u64 read_write_cpu(struct hfi1_devdata *dd, u64 *z_val,
+ u64 __percpu *cntr,
+ int vl, int mode, u64 data)
+{
+
+ u64 ret = 0;
+
+ if (vl != CNTR_INVALID_VL)
+ return 0;
+
+ if (mode == CNTR_MODE_R) {
+ ret = get_all_cpu_total(cntr) - *z_val;
+ } else if (mode == CNTR_MODE_W) {
+ /* A write can only zero the counter */
+ if (data == 0)
+ *z_val = get_all_cpu_total(cntr);
+ else
+ dd_dev_err(dd, "Per CPU cntrs can only be zeroed");
+ } else {
+ dd_dev_err(dd, "Invalid cntr sw cpu access mode");
+ return 0;
+ }
+
+ return ret;
+}
+
+static u64 access_sw_cpu_intr(const struct cntr_entry *entry,
+ void *context, int vl, int mode, u64 data)
+{
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)context;
+
+ return read_write_cpu(dd, &dd->z_int_counter, dd->int_counter, vl,
+ mode, data);
+}
+
+static u64 access_sw_cpu_rcv_limit(const struct cntr_entry *entry,
+ void *context, int vl, int mode, u64 data)
+{
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)context;
+
+ return read_write_cpu(dd, &dd->z_rcv_limit, dd->rcv_limit, vl,
+ mode, data);
+}
+
+static u64 access_sw_pio_wait(const struct cntr_entry *entry,
+ void *context, int vl, int mode, u64 data)
+{
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)context;
+
+ return dd->verbs_dev.n_piowait;
+}
+
+static u64 access_sw_vtx_wait(const struct cntr_entry *entry,
+ void *context, int vl, int mode, u64 data)
+{
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)context;
+
+ return dd->verbs_dev.n_txwait;
+}
+
+static u64 access_sw_kmem_wait(const struct cntr_entry *entry,
+ void *context, int vl, int mode, u64 data)
+{
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)context;
+
+ return dd->verbs_dev.n_kmem_wait;
+}
+
+#define def_access_sw_cpu(cntr) \
+static u64 access_sw_cpu_##cntr(const struct cntr_entry *entry, \
+ void *context, int vl, int mode, u64 data) \
+{ \
+ struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)context; \
+ return read_write_cpu(ppd->dd, &ppd->ibport_data.z_ ##cntr, \
+ ppd->ibport_data.cntr, vl, \
+ mode, data); \
+}
+
+def_access_sw_cpu(rc_acks);
+def_access_sw_cpu(rc_qacks);
+def_access_sw_cpu(rc_delayed_comp);
+
+#define def_access_ibp_counter(cntr) \
+static u64 access_ibp_##cntr(const struct cntr_entry *entry, \
+ void *context, int vl, int mode, u64 data) \
+{ \
+ struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)context; \
+ \
+ if (vl != CNTR_INVALID_VL) \
+ return 0; \
+ \
+ return read_write_sw(ppd->dd, &ppd->ibport_data.n_ ##cntr, \
+ mode, data); \
+}
+
+def_access_ibp_counter(loop_pkts);
+def_access_ibp_counter(rc_resends);
+def_access_ibp_counter(rnr_naks);
+def_access_ibp_counter(other_naks);
+def_access_ibp_counter(rc_timeouts);
+def_access_ibp_counter(pkt_drops);
+def_access_ibp_counter(dmawait);
+def_access_ibp_counter(rc_seqnak);
+def_access_ibp_counter(rc_dupreq);
+def_access_ibp_counter(rdma_seq);
+def_access_ibp_counter(unaligned);
+def_access_ibp_counter(seq_naks);
+
+static struct cntr_entry dev_cntrs[DEV_CNTR_LAST] = {
+[C_RCV_OVF] = RXE32_DEV_CNTR_ELEM(RcvOverflow, RCV_BUF_OVFL_CNT, CNTR_SYNTH),
+[C_RX_TID_FULL] = RXE32_DEV_CNTR_ELEM(RxTIDFullEr, RCV_TID_FULL_ERR_CNT,
+ CNTR_NORMAL),
+[C_RX_TID_INVALID] = RXE32_DEV_CNTR_ELEM(RxTIDInvalid, RCV_TID_VALID_ERR_CNT,
+ CNTR_NORMAL),
+[C_RX_TID_FLGMS] = RXE32_DEV_CNTR_ELEM(RxTidFLGMs,
+ RCV_TID_FLOW_GEN_MISMATCH_CNT,
+ CNTR_NORMAL),
+[C_RX_CTX_RHQS] = RXE32_DEV_CNTR_ELEM(RxCtxRHQS, RCV_CONTEXT_RHQ_STALL,
+ CNTR_NORMAL),
+[C_RX_CTX_EGRS] = RXE32_DEV_CNTR_ELEM(RxCtxEgrS, RCV_CONTEXT_EGR_STALL,
+ CNTR_NORMAL),
+[C_RCV_TID_FLSMS] = RXE32_DEV_CNTR_ELEM(RxTidFLSMs,
+ RCV_TID_FLOW_SEQ_MISMATCH_CNT, CNTR_NORMAL),
+[C_CCE_PCI_CR_ST] = CCE_PERF_DEV_CNTR_ELEM(CcePciCrSt,
+ CCE_PCIE_POSTED_CRDT_STALL_CNT, CNTR_NORMAL),
+[C_CCE_PCI_TR_ST] = CCE_PERF_DEV_CNTR_ELEM(CcePciTrSt, CCE_PCIE_TRGT_STALL_CNT,
+ CNTR_NORMAL),
+[C_CCE_PIO_WR_ST] = CCE_PERF_DEV_CNTR_ELEM(CcePioWrSt, CCE_PIO_WR_STALL_CNT,
+ CNTR_NORMAL),
+[C_CCE_ERR_INT] = CCE_INT_DEV_CNTR_ELEM(CceErrInt, CCE_ERR_INT_CNT,
+ CNTR_NORMAL),
+[C_CCE_SDMA_INT] = CCE_INT_DEV_CNTR_ELEM(CceSdmaInt, CCE_SDMA_INT_CNT,
+ CNTR_NORMAL),
+[C_CCE_MISC_INT] = CCE_INT_DEV_CNTR_ELEM(CceMiscInt, CCE_MISC_INT_CNT,
+ CNTR_NORMAL),
+[C_CCE_RCV_AV_INT] = CCE_INT_DEV_CNTR_ELEM(CceRcvAvInt, CCE_RCV_AVAIL_INT_CNT,
+ CNTR_NORMAL),
+[C_CCE_RCV_URG_INT] = CCE_INT_DEV_CNTR_ELEM(CceRcvUrgInt,
+ CCE_RCV_URGENT_INT_CNT, CNTR_NORMAL),
+[C_CCE_SEND_CR_INT] = CCE_INT_DEV_CNTR_ELEM(CceSndCrInt,
+ CCE_SEND_CREDIT_INT_CNT, CNTR_NORMAL),
+[C_DC_UNC_ERR] = DC_PERF_CNTR(DcUnctblErr, DCC_ERR_UNCORRECTABLE_CNT,
+ CNTR_SYNTH),
+[C_DC_RCV_ERR] = DC_PERF_CNTR(DcRecvErr, DCC_ERR_PORTRCV_ERR_CNT, CNTR_SYNTH),
+[C_DC_FM_CFG_ERR] = DC_PERF_CNTR(DcFmCfgErr, DCC_ERR_FMCONFIG_ERR_CNT,
+ CNTR_SYNTH),
+[C_DC_RMT_PHY_ERR] = DC_PERF_CNTR(DcRmtPhyErr, DCC_ERR_RCVREMOTE_PHY_ERR_CNT,
+ CNTR_SYNTH),
+[C_DC_DROPPED_PKT] = DC_PERF_CNTR(DcDroppedPkt, DCC_ERR_DROPPED_PKT_CNT,
+ CNTR_SYNTH),
+[C_DC_MC_XMIT_PKTS] = DC_PERF_CNTR(DcMcXmitPkts,
+ DCC_PRF_PORT_XMIT_MULTICAST_CNT, CNTR_SYNTH),
+[C_DC_MC_RCV_PKTS] = DC_PERF_CNTR(DcMcRcvPkts,
+ DCC_PRF_PORT_RCV_MULTICAST_PKT_CNT,
+ CNTR_SYNTH),
+[C_DC_XMIT_CERR] = DC_PERF_CNTR(DcXmitCorr,
+ DCC_PRF_PORT_XMIT_CORRECTABLE_CNT, CNTR_SYNTH),
+[C_DC_RCV_CERR] = DC_PERF_CNTR(DcRcvCorrCnt, DCC_PRF_PORT_RCV_CORRECTABLE_CNT,
+ CNTR_SYNTH),
+[C_DC_RCV_FCC] = DC_PERF_CNTR(DcRxFCntl, DCC_PRF_RX_FLOW_CRTL_CNT,
+ CNTR_SYNTH),
+[C_DC_XMIT_FCC] = DC_PERF_CNTR(DcXmitFCntl, DCC_PRF_TX_FLOW_CRTL_CNT,
+ CNTR_SYNTH),
+[C_DC_XMIT_FLITS] = DC_PERF_CNTR(DcXmitFlits, DCC_PRF_PORT_XMIT_DATA_CNT,
+ CNTR_SYNTH),
+[C_DC_RCV_FLITS] = DC_PERF_CNTR(DcRcvFlits, DCC_PRF_PORT_RCV_DATA_CNT,
+ CNTR_SYNTH),
+[C_DC_XMIT_PKTS] = DC_PERF_CNTR(DcXmitPkts, DCC_PRF_PORT_XMIT_PKTS_CNT,
+ CNTR_SYNTH),
+[C_DC_RCV_PKTS] = DC_PERF_CNTR(DcRcvPkts, DCC_PRF_PORT_RCV_PKTS_CNT,
+ CNTR_SYNTH),
+[C_DC_RX_FLIT_VL] = DC_PERF_CNTR(DcRxFlitVl, DCC_PRF_PORT_VL_RCV_DATA_CNT,
+ CNTR_SYNTH | CNTR_VL),
+[C_DC_RX_PKT_VL] = DC_PERF_CNTR(DcRxPktVl, DCC_PRF_PORT_VL_RCV_PKTS_CNT,
+ CNTR_SYNTH | CNTR_VL),
+[C_DC_RCV_FCN] = DC_PERF_CNTR(DcRcvFcn, DCC_PRF_PORT_RCV_FECN_CNT, CNTR_SYNTH),
+[C_DC_RCV_FCN_VL] = DC_PERF_CNTR(DcRcvFcnVl, DCC_PRF_PORT_VL_RCV_FECN_CNT,
+ CNTR_SYNTH | CNTR_VL),
+[C_DC_RCV_BCN] = DC_PERF_CNTR(DcRcvBcn, DCC_PRF_PORT_RCV_BECN_CNT, CNTR_SYNTH),
+[C_DC_RCV_BCN_VL] = DC_PERF_CNTR(DcRcvBcnVl, DCC_PRF_PORT_VL_RCV_BECN_CNT,
+ CNTR_SYNTH | CNTR_VL),
+[C_DC_RCV_BBL] = DC_PERF_CNTR(DcRcvBbl, DCC_PRF_PORT_RCV_BUBBLE_CNT,
+ CNTR_SYNTH),
+[C_DC_RCV_BBL_VL] = DC_PERF_CNTR(DcRcvBblVl, DCC_PRF_PORT_VL_RCV_BUBBLE_CNT,
+ CNTR_SYNTH | CNTR_VL),
+[C_DC_MARK_FECN] = DC_PERF_CNTR(DcMarkFcn, DCC_PRF_PORT_MARK_FECN_CNT,
+ CNTR_SYNTH),
+[C_DC_MARK_FECN_VL] = DC_PERF_CNTR(DcMarkFcnVl, DCC_PRF_PORT_VL_MARK_FECN_CNT,
+ CNTR_SYNTH | CNTR_VL),
+[C_DC_TOTAL_CRC] =
+ DC_PERF_CNTR_LCB(DcTotCrc, DC_LCB_ERR_INFO_TOTAL_CRC_ERR,
+ CNTR_SYNTH),
+[C_DC_CRC_LN0] = DC_PERF_CNTR_LCB(DcCrcLn0, DC_LCB_ERR_INFO_CRC_ERR_LN0,
+ CNTR_SYNTH),
+[C_DC_CRC_LN1] = DC_PERF_CNTR_LCB(DcCrcLn1, DC_LCB_ERR_INFO_CRC_ERR_LN1,
+ CNTR_SYNTH),
+[C_DC_CRC_LN2] = DC_PERF_CNTR_LCB(DcCrcLn2, DC_LCB_ERR_INFO_CRC_ERR_LN2,
+ CNTR_SYNTH),
+[C_DC_CRC_LN3] = DC_PERF_CNTR_LCB(DcCrcLn3, DC_LCB_ERR_INFO_CRC_ERR_LN3,
+ CNTR_SYNTH),
+[C_DC_CRC_MULT_LN] =
+ DC_PERF_CNTR_LCB(DcMultLn, DC_LCB_ERR_INFO_CRC_ERR_MULTI_LN,
+ CNTR_SYNTH),
+[C_DC_TX_REPLAY] = DC_PERF_CNTR_LCB(DcTxReplay, DC_LCB_ERR_INFO_TX_REPLAY_CNT,
+ CNTR_SYNTH),
+[C_DC_RX_REPLAY] = DC_PERF_CNTR_LCB(DcRxReplay, DC_LCB_ERR_INFO_RX_REPLAY_CNT,
+ CNTR_SYNTH),
+[C_DC_SEQ_CRC_CNT] =
+ DC_PERF_CNTR_LCB(DcLinkSeqCrc, DC_LCB_ERR_INFO_SEQ_CRC_CNT,
+ CNTR_SYNTH),
+[C_DC_ESC0_ONLY_CNT] =
+ DC_PERF_CNTR_LCB(DcEsc0, DC_LCB_ERR_INFO_ESCAPE_0_ONLY_CNT,
+ CNTR_SYNTH),
+[C_DC_ESC0_PLUS1_CNT] =
+ DC_PERF_CNTR_LCB(DcEsc1, DC_LCB_ERR_INFO_ESCAPE_0_PLUS1_CNT,
+ CNTR_SYNTH),
+[C_DC_ESC0_PLUS2_CNT] =
+ DC_PERF_CNTR_LCB(DcEsc0Plus2, DC_LCB_ERR_INFO_ESCAPE_0_PLUS2_CNT,
+ CNTR_SYNTH),
+[C_DC_REINIT_FROM_PEER_CNT] =
+ DC_PERF_CNTR_LCB(DcReinitPeer, DC_LCB_ERR_INFO_REINIT_FROM_PEER_CNT,
+ CNTR_SYNTH),
+[C_DC_SBE_CNT] = DC_PERF_CNTR_LCB(DcSbe, DC_LCB_ERR_INFO_SBE_CNT,
+ CNTR_SYNTH),
+[C_DC_MISC_FLG_CNT] =
+ DC_PERF_CNTR_LCB(DcMiscFlg, DC_LCB_ERR_INFO_MISC_FLG_CNT,
+ CNTR_SYNTH),
+[C_DC_PRF_GOOD_LTP_CNT] =
+ DC_PERF_CNTR_LCB(DcGoodLTP, DC_LCB_PRF_GOOD_LTP_CNT, CNTR_SYNTH),
+[C_DC_PRF_ACCEPTED_LTP_CNT] =
+ DC_PERF_CNTR_LCB(DcAccLTP, DC_LCB_PRF_ACCEPTED_LTP_CNT,
+ CNTR_SYNTH),
+[C_DC_PRF_RX_FLIT_CNT] =
+ DC_PERF_CNTR_LCB(DcPrfRxFlit, DC_LCB_PRF_RX_FLIT_CNT, CNTR_SYNTH),
+[C_DC_PRF_TX_FLIT_CNT] =
+ DC_PERF_CNTR_LCB(DcPrfTxFlit, DC_LCB_PRF_TX_FLIT_CNT, CNTR_SYNTH),
+[C_DC_PRF_CLK_CNTR] =
+ DC_PERF_CNTR_LCB(DcPrfClk, DC_LCB_PRF_CLK_CNTR, CNTR_SYNTH),
+[C_DC_PG_DBG_FLIT_CRDTS_CNT] =
+ DC_PERF_CNTR_LCB(DcFltCrdts, DC_LCB_PG_DBG_FLIT_CRDTS_CNT, CNTR_SYNTH),
+[C_DC_PG_STS_PAUSE_COMPLETE_CNT] =
+ DC_PERF_CNTR_LCB(DcPauseComp, DC_LCB_PG_STS_PAUSE_COMPLETE_CNT,
+ CNTR_SYNTH),
+[C_DC_PG_STS_TX_SBE_CNT] =
+ DC_PERF_CNTR_LCB(DcStsTxSbe, DC_LCB_PG_STS_TX_SBE_CNT, CNTR_SYNTH),
+[C_DC_PG_STS_TX_MBE_CNT] =
+ DC_PERF_CNTR_LCB(DcStsTxMbe, DC_LCB_PG_STS_TX_MBE_CNT,
+ CNTR_SYNTH),
+[C_SW_CPU_INTR] = CNTR_ELEM("Intr", 0, 0, CNTR_NORMAL,
+ access_sw_cpu_intr),
+[C_SW_CPU_RCV_LIM] = CNTR_ELEM("RcvLimit", 0, 0, CNTR_NORMAL,
+ access_sw_cpu_rcv_limit),
+[C_SW_VTX_WAIT] = CNTR_ELEM("vTxWait", 0, 0, CNTR_NORMAL,
+ access_sw_vtx_wait),
+[C_SW_PIO_WAIT] = CNTR_ELEM("PioWait", 0, 0, CNTR_NORMAL,
+ access_sw_pio_wait),
+[C_SW_KMEM_WAIT] = CNTR_ELEM("KmemWait", 0, 0, CNTR_NORMAL,
+ access_sw_kmem_wait),
+};
+
+static struct cntr_entry port_cntrs[PORT_CNTR_LAST] = {
+[C_TX_UNSUP_VL] = TXE32_PORT_CNTR_ELEM(TxUnVLErr, SEND_UNSUP_VL_ERR_CNT,
+ CNTR_NORMAL),
+[C_TX_INVAL_LEN] = TXE32_PORT_CNTR_ELEM(TxInvalLen, SEND_LEN_ERR_CNT,
+ CNTR_NORMAL),
+[C_TX_MM_LEN_ERR] = TXE32_PORT_CNTR_ELEM(TxMMLenErr, SEND_MAX_MIN_LEN_ERR_CNT,
+ CNTR_NORMAL),
+[C_TX_UNDERRUN] = TXE32_PORT_CNTR_ELEM(TxUnderrun, SEND_UNDERRUN_CNT,
+ CNTR_NORMAL),
+[C_TX_FLOW_STALL] = TXE32_PORT_CNTR_ELEM(TxFlowStall, SEND_FLOW_STALL_CNT,
+ CNTR_NORMAL),
+[C_TX_DROPPED] = TXE32_PORT_CNTR_ELEM(TxDropped, SEND_DROPPED_PKT_CNT,
+ CNTR_NORMAL),
+[C_TX_HDR_ERR] = TXE32_PORT_CNTR_ELEM(TxHdrErr, SEND_HEADERS_ERR_CNT,
+ CNTR_NORMAL),
+[C_TX_PKT] = TXE64_PORT_CNTR_ELEM(TxPkt, SEND_DATA_PKT_CNT, CNTR_NORMAL),
+[C_TX_WORDS] = TXE64_PORT_CNTR_ELEM(TxWords, SEND_DWORD_CNT, CNTR_NORMAL),
+[C_TX_WAIT] = TXE64_PORT_CNTR_ELEM(TxWait, SEND_WAIT_CNT, CNTR_SYNTH),
+[C_TX_FLIT_VL] = TXE64_PORT_CNTR_ELEM(TxFlitVL, SEND_DATA_VL0_CNT,
+ CNTR_SYNTH | CNTR_VL),
+[C_TX_PKT_VL] = TXE64_PORT_CNTR_ELEM(TxPktVL, SEND_DATA_PKT_VL0_CNT,
+ CNTR_SYNTH | CNTR_VL),
+[C_TX_WAIT_VL] = TXE64_PORT_CNTR_ELEM(TxWaitVL, SEND_WAIT_VL0_CNT,
+ CNTR_SYNTH | CNTR_VL),
+[C_RX_PKT] = RXE64_PORT_CNTR_ELEM(RxPkt, RCV_DATA_PKT_CNT, CNTR_NORMAL),
+[C_RX_WORDS] = RXE64_PORT_CNTR_ELEM(RxWords, RCV_DWORD_CNT, CNTR_NORMAL),
+[C_SW_LINK_DOWN] = CNTR_ELEM("SwLinkDown", 0, 0, CNTR_SYNTH | CNTR_32BIT,
+ access_sw_link_dn_cnt),
+[C_SW_LINK_UP] = CNTR_ELEM("SwLinkUp", 0, 0, CNTR_SYNTH | CNTR_32BIT,
+ access_sw_link_up_cnt),
+[C_SW_XMIT_DSCD] = CNTR_ELEM("XmitDscd", 0, 0, CNTR_SYNTH | CNTR_32BIT,
+ access_sw_xmit_discards),
+[C_SW_XMIT_DSCD_VL] = CNTR_ELEM("XmitDscdVl", 0, 0,
+ CNTR_SYNTH | CNTR_32BIT | CNTR_VL,
+ access_sw_xmit_discards),
+[C_SW_XMIT_CSTR_ERR] = CNTR_ELEM("XmitCstrErr", 0, 0, CNTR_SYNTH,
+ access_xmit_constraint_errs),
+[C_SW_RCV_CSTR_ERR] = CNTR_ELEM("RcvCstrErr", 0, 0, CNTR_SYNTH,
+ access_rcv_constraint_errs),
+[C_SW_IBP_LOOP_PKTS] = SW_IBP_CNTR(LoopPkts, loop_pkts),
+[C_SW_IBP_RC_RESENDS] = SW_IBP_CNTR(RcResend, rc_resends),
+[C_SW_IBP_RNR_NAKS] = SW_IBP_CNTR(RnrNak, rnr_naks),
+[C_SW_IBP_OTHER_NAKS] = SW_IBP_CNTR(OtherNak, other_naks),
+[C_SW_IBP_RC_TIMEOUTS] = SW_IBP_CNTR(RcTimeOut, rc_timeouts),
+[C_SW_IBP_PKT_DROPS] = SW_IBP_CNTR(PktDrop, pkt_drops),
+[C_SW_IBP_DMA_WAIT] = SW_IBP_CNTR(DmaWait, dmawait),
+[C_SW_IBP_RC_SEQNAK] = SW_IBP_CNTR(RcSeqNak, rc_seqnak),
+[C_SW_IBP_RC_DUPREQ] = SW_IBP_CNTR(RcDupRew, rc_dupreq),
+[C_SW_IBP_RDMA_SEQ] = SW_IBP_CNTR(RdmaSeq, rdma_seq),
+[C_SW_IBP_UNALIGNED] = SW_IBP_CNTR(Unaligned, unaligned),
+[C_SW_IBP_SEQ_NAK] = SW_IBP_CNTR(SeqNak, seq_naks),
+[C_SW_CPU_RC_ACKS] = CNTR_ELEM("RcAcks", 0, 0, CNTR_NORMAL,
+ access_sw_cpu_rc_acks),
+[C_SW_CPU_RC_QACKS] = CNTR_ELEM("RcQacks", 0, 0, CNTR_NORMAL,
+ access_sw_cpu_rc_qacks),
+[C_SW_CPU_RC_DELAYED_COMP] = CNTR_ELEM("RcDelayComp", 0, 0, CNTR_NORMAL,
+ access_sw_cpu_rc_delayed_comp),
+[OVR_LBL(0)] = OVR_ELM(0), [OVR_LBL(1)] = OVR_ELM(1),
+[OVR_LBL(2)] = OVR_ELM(2), [OVR_LBL(3)] = OVR_ELM(3),
+[OVR_LBL(4)] = OVR_ELM(4), [OVR_LBL(5)] = OVR_ELM(5),
+[OVR_LBL(6)] = OVR_ELM(6), [OVR_LBL(7)] = OVR_ELM(7),
+[OVR_LBL(8)] = OVR_ELM(8), [OVR_LBL(9)] = OVR_ELM(9),
+[OVR_LBL(10)] = OVR_ELM(10), [OVR_LBL(11)] = OVR_ELM(11),
+[OVR_LBL(12)] = OVR_ELM(12), [OVR_LBL(13)] = OVR_ELM(13),
+[OVR_LBL(14)] = OVR_ELM(14), [OVR_LBL(15)] = OVR_ELM(15),
+[OVR_LBL(16)] = OVR_ELM(16), [OVR_LBL(17)] = OVR_ELM(17),
+[OVR_LBL(18)] = OVR_ELM(18), [OVR_LBL(19)] = OVR_ELM(19),
+[OVR_LBL(20)] = OVR_ELM(20), [OVR_LBL(21)] = OVR_ELM(21),
+[OVR_LBL(22)] = OVR_ELM(22), [OVR_LBL(23)] = OVR_ELM(23),
+[OVR_LBL(24)] = OVR_ELM(24), [OVR_LBL(25)] = OVR_ELM(25),
+[OVR_LBL(26)] = OVR_ELM(26), [OVR_LBL(27)] = OVR_ELM(27),
+[OVR_LBL(28)] = OVR_ELM(28), [OVR_LBL(29)] = OVR_ELM(29),
+[OVR_LBL(30)] = OVR_ELM(30), [OVR_LBL(31)] = OVR_ELM(31),
+[OVR_LBL(32)] = OVR_ELM(32), [OVR_LBL(33)] = OVR_ELM(33),
+[OVR_LBL(34)] = OVR_ELM(34), [OVR_LBL(35)] = OVR_ELM(35),
+[OVR_LBL(36)] = OVR_ELM(36), [OVR_LBL(37)] = OVR_ELM(37),
+[OVR_LBL(38)] = OVR_ELM(38), [OVR_LBL(39)] = OVR_ELM(39),
+[OVR_LBL(40)] = OVR_ELM(40), [OVR_LBL(41)] = OVR_ELM(41),
+[OVR_LBL(42)] = OVR_ELM(42), [OVR_LBL(43)] = OVR_ELM(43),
+[OVR_LBL(44)] = OVR_ELM(44), [OVR_LBL(45)] = OVR_ELM(45),
+[OVR_LBL(46)] = OVR_ELM(46), [OVR_LBL(47)] = OVR_ELM(47),
+[OVR_LBL(48)] = OVR_ELM(48), [OVR_LBL(49)] = OVR_ELM(49),
+[OVR_LBL(50)] = OVR_ELM(50), [OVR_LBL(51)] = OVR_ELM(51),
+[OVR_LBL(52)] = OVR_ELM(52), [OVR_LBL(53)] = OVR_ELM(53),
+[OVR_LBL(54)] = OVR_ELM(54), [OVR_LBL(55)] = OVR_ELM(55),
+[OVR_LBL(56)] = OVR_ELM(56), [OVR_LBL(57)] = OVR_ELM(57),
+[OVR_LBL(58)] = OVR_ELM(58), [OVR_LBL(59)] = OVR_ELM(59),
+[OVR_LBL(60)] = OVR_ELM(60), [OVR_LBL(61)] = OVR_ELM(61),
+[OVR_LBL(62)] = OVR_ELM(62), [OVR_LBL(63)] = OVR_ELM(63),
+[OVR_LBL(64)] = OVR_ELM(64), [OVR_LBL(65)] = OVR_ELM(65),
+[OVR_LBL(66)] = OVR_ELM(66), [OVR_LBL(67)] = OVR_ELM(67),
+[OVR_LBL(68)] = OVR_ELM(68), [OVR_LBL(69)] = OVR_ELM(69),
+[OVR_LBL(70)] = OVR_ELM(70), [OVR_LBL(71)] = OVR_ELM(71),
+[OVR_LBL(72)] = OVR_ELM(72), [OVR_LBL(73)] = OVR_ELM(73),
+[OVR_LBL(74)] = OVR_ELM(74), [OVR_LBL(75)] = OVR_ELM(75),
+[OVR_LBL(76)] = OVR_ELM(76), [OVR_LBL(77)] = OVR_ELM(77),
+[OVR_LBL(78)] = OVR_ELM(78), [OVR_LBL(79)] = OVR_ELM(79),
+[OVR_LBL(80)] = OVR_ELM(80), [OVR_LBL(81)] = OVR_ELM(81),
+[OVR_LBL(82)] = OVR_ELM(82), [OVR_LBL(83)] = OVR_ELM(83),
+[OVR_LBL(84)] = OVR_ELM(84), [OVR_LBL(85)] = OVR_ELM(85),
+[OVR_LBL(86)] = OVR_ELM(86), [OVR_LBL(87)] = OVR_ELM(87),
+[OVR_LBL(88)] = OVR_ELM(88), [OVR_LBL(89)] = OVR_ELM(89),
+[OVR_LBL(90)] = OVR_ELM(90), [OVR_LBL(91)] = OVR_ELM(91),
+[OVR_LBL(92)] = OVR_ELM(92), [OVR_LBL(93)] = OVR_ELM(93),
+[OVR_LBL(94)] = OVR_ELM(94), [OVR_LBL(95)] = OVR_ELM(95),
+[OVR_LBL(96)] = OVR_ELM(96), [OVR_LBL(97)] = OVR_ELM(97),
+[OVR_LBL(98)] = OVR_ELM(98), [OVR_LBL(99)] = OVR_ELM(99),
+[OVR_LBL(100)] = OVR_ELM(100), [OVR_LBL(101)] = OVR_ELM(101),
+[OVR_LBL(102)] = OVR_ELM(102), [OVR_LBL(103)] = OVR_ELM(103),
+[OVR_LBL(104)] = OVR_ELM(104), [OVR_LBL(105)] = OVR_ELM(105),
+[OVR_LBL(106)] = OVR_ELM(106), [OVR_LBL(107)] = OVR_ELM(107),
+[OVR_LBL(108)] = OVR_ELM(108), [OVR_LBL(109)] = OVR_ELM(109),
+[OVR_LBL(110)] = OVR_ELM(110), [OVR_LBL(111)] = OVR_ELM(111),
+[OVR_LBL(112)] = OVR_ELM(112), [OVR_LBL(113)] = OVR_ELM(113),
+[OVR_LBL(114)] = OVR_ELM(114), [OVR_LBL(115)] = OVR_ELM(115),
+[OVR_LBL(116)] = OVR_ELM(116), [OVR_LBL(117)] = OVR_ELM(117),
+[OVR_LBL(118)] = OVR_ELM(118), [OVR_LBL(119)] = OVR_ELM(119),
+[OVR_LBL(120)] = OVR_ELM(120), [OVR_LBL(121)] = OVR_ELM(121),
+[OVR_LBL(122)] = OVR_ELM(122), [OVR_LBL(123)] = OVR_ELM(123),
+[OVR_LBL(124)] = OVR_ELM(124), [OVR_LBL(125)] = OVR_ELM(125),
+[OVR_LBL(126)] = OVR_ELM(126), [OVR_LBL(127)] = OVR_ELM(127),
+[OVR_LBL(128)] = OVR_ELM(128), [OVR_LBL(129)] = OVR_ELM(129),
+[OVR_LBL(130)] = OVR_ELM(130), [OVR_LBL(131)] = OVR_ELM(131),
+[OVR_LBL(132)] = OVR_ELM(132), [OVR_LBL(133)] = OVR_ELM(133),
+[OVR_LBL(134)] = OVR_ELM(134), [OVR_LBL(135)] = OVR_ELM(135),
+[OVR_LBL(136)] = OVR_ELM(136), [OVR_LBL(137)] = OVR_ELM(137),
+[OVR_LBL(138)] = OVR_ELM(138), [OVR_LBL(139)] = OVR_ELM(139),
+[OVR_LBL(140)] = OVR_ELM(140), [OVR_LBL(141)] = OVR_ELM(141),
+[OVR_LBL(142)] = OVR_ELM(142), [OVR_LBL(143)] = OVR_ELM(143),
+[OVR_LBL(144)] = OVR_ELM(144), [OVR_LBL(145)] = OVR_ELM(145),
+[OVR_LBL(146)] = OVR_ELM(146), [OVR_LBL(147)] = OVR_ELM(147),
+[OVR_LBL(148)] = OVR_ELM(148), [OVR_LBL(149)] = OVR_ELM(149),
+[OVR_LBL(150)] = OVR_ELM(150), [OVR_LBL(151)] = OVR_ELM(151),
+[OVR_LBL(152)] = OVR_ELM(152), [OVR_LBL(153)] = OVR_ELM(153),
+[OVR_LBL(154)] = OVR_ELM(154), [OVR_LBL(155)] = OVR_ELM(155),
+[OVR_LBL(156)] = OVR_ELM(156), [OVR_LBL(157)] = OVR_ELM(157),
+[OVR_LBL(158)] = OVR_ELM(158), [OVR_LBL(159)] = OVR_ELM(159),
+};
+
+/* ======================================================================== */
+
+/* return true if this is chip revision revision a0 */
+int is_a0(struct hfi1_devdata *dd)
+{
+ return ((dd->revision >> CCE_REVISION_CHIP_REV_MINOR_SHIFT)
+ & CCE_REVISION_CHIP_REV_MINOR_MASK) == 0;
+}
+
+/* return true if this is chip revision revision a */
+int is_ax(struct hfi1_devdata *dd)
+{
+ u8 chip_rev_minor =
+ dd->revision >> CCE_REVISION_CHIP_REV_MINOR_SHIFT
+ & CCE_REVISION_CHIP_REV_MINOR_MASK;
+ return (chip_rev_minor & 0xf0) == 0;
+}
+
+/* return true if this is chip revision revision b */
+int is_bx(struct hfi1_devdata *dd)
+{
+ u8 chip_rev_minor =
+ dd->revision >> CCE_REVISION_CHIP_REV_MINOR_SHIFT
+ & CCE_REVISION_CHIP_REV_MINOR_MASK;
+ return !!(chip_rev_minor & 0x10);
+}
+
+/*
+ * Append string s to buffer buf. Arguments curp and len are the current
+ * position and remaining length, respectively.
+ *
+ * return 0 on success, 1 on out of room
+ */
+static int append_str(char *buf, char **curp, int *lenp, const char *s)
+{
+ char *p = *curp;
+ int len = *lenp;
+ int result = 0; /* success */
+ char c;
+
+ /* add a comma, if first in the buffer */
+ if (p != buf) {
+ if (len == 0) {
+ result = 1; /* out of room */
+ goto done;
+ }
+ *p++ = ',';
+ len--;
+ }
+
+ /* copy the string */
+ while ((c = *s++) != 0) {
+ if (len == 0) {
+ result = 1; /* out of room */
+ goto done;
+ }
+ *p++ = c;
+ len--;
+ }
+
+done:
+ /* write return values */
+ *curp = p;
+ *lenp = len;
+
+ return result;
+}
+
+/*
+ * Using the given flag table, print a comma separated string into
+ * the buffer. End in '*' if the buffer is too short.
+ */
+static char *flag_string(char *buf, int buf_len, u64 flags,
+ struct flag_table *table, int table_size)
+{
+ char extra[32];
+ char *p = buf;
+ int len = buf_len;
+ int no_room = 0;
+ int i;
+
+ /* make sure there is at least 2 so we can form "*" */
+ if (len < 2)
+ return "";
+
+ len--; /* leave room for a nul */
+ for (i = 0; i < table_size; i++) {
+ if (flags & table[i].flag) {
+ no_room = append_str(buf, &p, &len, table[i].str);
+ if (no_room)
+ break;
+ flags &= ~table[i].flag;
+ }
+ }
+
+ /* any undocumented bits left? */
+ if (!no_room && flags) {
+ snprintf(extra, sizeof(extra), "bits 0x%llx", flags);
+ no_room = append_str(buf, &p, &len, extra);
+ }
+
+ /* add * if ran out of room */
+ if (no_room) {
+ /* may need to back up to add space for a '*' */
+ if (len == 0)
+ --p;
+ *p++ = '*';
+ }
+
+ /* add final nul - space already allocated above */
+ *p = 0;
+ return buf;
+}
+
+/* first 8 CCE error interrupt source names */
+static const char * const cce_misc_names[] = {
+ "CceErrInt", /* 0 */
+ "RxeErrInt", /* 1 */
+ "MiscErrInt", /* 2 */
+ "Reserved3", /* 3 */
+ "PioErrInt", /* 4 */
+ "SDmaErrInt", /* 5 */
+ "EgressErrInt", /* 6 */
+ "TxeErrInt" /* 7 */
+};
+
+/*
+ * Return the miscellaneous error interrupt name.
+ */
+static char *is_misc_err_name(char *buf, size_t bsize, unsigned int source)
+{
+ if (source < ARRAY_SIZE(cce_misc_names))
+ strncpy(buf, cce_misc_names[source], bsize);
+ else
+ snprintf(buf,
+ bsize,
+ "Reserved%u",
+ source + IS_GENERAL_ERR_START);
+
+ return buf;
+}
+
+/*
+ * Return the SDMA engine error interrupt name.
+ */
+static char *is_sdma_eng_err_name(char *buf, size_t bsize, unsigned int source)
+{
+ snprintf(buf, bsize, "SDmaEngErrInt%u", source);
+ return buf;
+}
+
+/*
+ * Return the send context error interrupt name.
+ */
+static char *is_sendctxt_err_name(char *buf, size_t bsize, unsigned int source)
+{
+ snprintf(buf, bsize, "SendCtxtErrInt%u", source);
+ return buf;
+}
+
+static const char * const various_names[] = {
+ "PbcInt",
+ "GpioAssertInt",
+ "Qsfp1Int",
+ "Qsfp2Int",
+ "TCritInt"
+};
+
+/*
+ * Return the various interrupt name.
+ */
+static char *is_various_name(char *buf, size_t bsize, unsigned int source)
+{
+ if (source < ARRAY_SIZE(various_names))
+ strncpy(buf, various_names[source], bsize);
+ else
+ snprintf(buf, bsize, "Reserved%u", source+IS_VARIOUS_START);
+ return buf;
+}
+
+/*
+ * Return the DC interrupt name.
+ */
+static char *is_dc_name(char *buf, size_t bsize, unsigned int source)
+{
+ static const char * const dc_int_names[] = {
+ "common",
+ "lcb",
+ "8051",
+ "lbm" /* local block merge */
+ };
+
+ if (source < ARRAY_SIZE(dc_int_names))
+ snprintf(buf, bsize, "dc_%s_int", dc_int_names[source]);
+ else
+ snprintf(buf, bsize, "DCInt%u", source);
+ return buf;
+}
+
+static const char * const sdma_int_names[] = {
+ "SDmaInt",
+ "SdmaIdleInt",
+ "SdmaProgressInt",
+};
+
+/*
+ * Return the SDMA engine interrupt name.
+ */
+static char *is_sdma_eng_name(char *buf, size_t bsize, unsigned int source)
+{
+ /* what interrupt */
+ unsigned int what = source / TXE_NUM_SDMA_ENGINES;
+ /* which engine */
+ unsigned int which = source % TXE_NUM_SDMA_ENGINES;
+
+ if (likely(what < 3))
+ snprintf(buf, bsize, "%s%u", sdma_int_names[what], which);
+ else
+ snprintf(buf, bsize, "Invalid SDMA interrupt %u", source);
+ return buf;
+}
+
+/*
+ * Return the receive available interrupt name.
+ */
+static char *is_rcv_avail_name(char *buf, size_t bsize, unsigned int source)
+{
+ snprintf(buf, bsize, "RcvAvailInt%u", source);
+ return buf;
+}
+
+/*
+ * Return the receive urgent interrupt name.
+ */
+static char *is_rcv_urgent_name(char *buf, size_t bsize, unsigned int source)
+{
+ snprintf(buf, bsize, "RcvUrgentInt%u", source);
+ return buf;
+}
+
+/*
+ * Return the send credit interrupt name.
+ */
+static char *is_send_credit_name(char *buf, size_t bsize, unsigned int source)
+{
+ snprintf(buf, bsize, "SendCreditInt%u", source);
+ return buf;
+}
+
+/*
+ * Return the reserved interrupt name.
+ */
+static char *is_reserved_name(char *buf, size_t bsize, unsigned int source)
+{
+ snprintf(buf, bsize, "Reserved%u", source + IS_RESERVED_START);
+ return buf;
+}
+
+static char *cce_err_status_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags,
+ cce_err_status_flags, ARRAY_SIZE(cce_err_status_flags));
+}
+
+static char *rxe_err_status_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags,
+ rxe_err_status_flags, ARRAY_SIZE(rxe_err_status_flags));
+}
+
+static char *misc_err_status_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags, misc_err_status_flags,
+ ARRAY_SIZE(misc_err_status_flags));
+}
+
+static char *pio_err_status_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags,
+ pio_err_status_flags, ARRAY_SIZE(pio_err_status_flags));
+}
+
+static char *sdma_err_status_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags,
+ sdma_err_status_flags,
+ ARRAY_SIZE(sdma_err_status_flags));
+}
+
+static char *egress_err_status_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags,
+ egress_err_status_flags, ARRAY_SIZE(egress_err_status_flags));
+}
+
+static char *egress_err_info_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags,
+ egress_err_info_flags, ARRAY_SIZE(egress_err_info_flags));
+}
+
+static char *send_err_status_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags,
+ send_err_status_flags,
+ ARRAY_SIZE(send_err_status_flags));
+}
+
+static void handle_cce_err(struct hfi1_devdata *dd, u32 unused, u64 reg)
+{
+ char buf[96];
+
+ /*
+ * For most these errors, there is nothing that can be done except
+ * report or record it.
+ */
+ dd_dev_info(dd, "CCE Error: %s\n",
+ cce_err_status_string(buf, sizeof(buf), reg));
+
+ if ((reg & CCE_ERR_STATUS_CCE_CLI2_ASYNC_FIFO_PARITY_ERR_SMASK)
+ && is_a0(dd)
+ && (dd->icode != ICODE_FUNCTIONAL_SIMULATOR)) {
+ /* this error requires a manual drop into SPC freeze mode */
+ /* then a fix up */
+ start_freeze_handling(dd->pport, FREEZE_SELF);
+ }
+}
+
+/*
+ * Check counters for receive errors that do not have an interrupt
+ * associated with them.
+ */
+#define RCVERR_CHECK_TIME 10
+static void update_rcverr_timer(unsigned long opaque)
+{
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)opaque;
+ struct hfi1_pportdata *ppd = dd->pport;
+ u32 cur_ovfl_cnt = read_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL);
+
+ if (dd->rcv_ovfl_cnt < cur_ovfl_cnt &&
+ ppd->port_error_action & OPA_PI_MASK_EX_BUFFER_OVERRUN) {
+ dd_dev_info(dd, "%s: PortErrorAction bounce\n", __func__);
+ set_link_down_reason(ppd,
+ OPA_LINKDOWN_REASON_EXCESSIVE_BUFFER_OVERRUN, 0,
+ OPA_LINKDOWN_REASON_EXCESSIVE_BUFFER_OVERRUN);
+ queue_work(ppd->hfi1_wq, &ppd->link_bounce_work);
+ }
+ dd->rcv_ovfl_cnt = (u32) cur_ovfl_cnt;
+
+ mod_timer(&dd->rcverr_timer, jiffies + HZ * RCVERR_CHECK_TIME);
+}
+
+static int init_rcverr(struct hfi1_devdata *dd)
+{
+ init_timer(&dd->rcverr_timer);
+ dd->rcverr_timer.function = update_rcverr_timer;
+ dd->rcverr_timer.data = (unsigned long) dd;
+ /* Assume the hardware counter has been reset */
+ dd->rcv_ovfl_cnt = 0;
+ return mod_timer(&dd->rcverr_timer, jiffies + HZ * RCVERR_CHECK_TIME);
+}
+
+static void free_rcverr(struct hfi1_devdata *dd)
+{
+ if (dd->rcverr_timer.data)
+ del_timer_sync(&dd->rcverr_timer);
+ dd->rcverr_timer.data = 0;
+}
+
+static void handle_rxe_err(struct hfi1_devdata *dd, u32 unused, u64 reg)
+{
+ char buf[96];
+
+ dd_dev_info(dd, "Receive Error: %s\n",
+ rxe_err_status_string(buf, sizeof(buf), reg));
+
+ if (reg & ALL_RXE_FREEZE_ERR) {
+ int flags = 0;
+
+ /*
+ * Freeze mode recovery is disabled for the errors
+ * in RXE_FREEZE_ABORT_MASK
+ */
+ if (is_a0(dd) && (reg & RXE_FREEZE_ABORT_MASK))
+ flags = FREEZE_ABORT;
+
+ start_freeze_handling(dd->pport, flags);
+ }
+}
+
+static void handle_misc_err(struct hfi1_devdata *dd, u32 unused, u64 reg)
+{
+ char buf[96];
+
+ dd_dev_info(dd, "Misc Error: %s",
+ misc_err_status_string(buf, sizeof(buf), reg));
+}
+
+static void handle_pio_err(struct hfi1_devdata *dd, u32 unused, u64 reg)
+{
+ char buf[96];
+
+ dd_dev_info(dd, "PIO Error: %s\n",
+ pio_err_status_string(buf, sizeof(buf), reg));
+
+ if (reg & ALL_PIO_FREEZE_ERR)
+ start_freeze_handling(dd->pport, 0);
+}
+
+static void handle_sdma_err(struct hfi1_devdata *dd, u32 unused, u64 reg)
+{
+ char buf[96];
+
+ dd_dev_info(dd, "SDMA Error: %s\n",
+ sdma_err_status_string(buf, sizeof(buf), reg));
+
+ if (reg & ALL_SDMA_FREEZE_ERR)
+ start_freeze_handling(dd->pport, 0);
+}
+
+static void count_port_inactive(struct hfi1_devdata *dd)
+{
+ struct hfi1_pportdata *ppd = dd->pport;
+
+ if (ppd->port_xmit_discards < ~(u64)0)
+ ppd->port_xmit_discards++;
+}
+
+/*
+ * We have had a "disallowed packet" error during egress. Determine the
+ * integrity check which failed, and update relevant error counter, etc.
+ *
+ * Note that the SEND_EGRESS_ERR_INFO register has only a single
+ * bit of state per integrity check, and so we can miss the reason for an
+ * egress error if more than one packet fails the same integrity check
+ * since we cleared the corresponding bit in SEND_EGRESS_ERR_INFO.
+ */
+static void handle_send_egress_err_info(struct hfi1_devdata *dd)
+{
+ struct hfi1_pportdata *ppd = dd->pport;
+ u64 src = read_csr(dd, SEND_EGRESS_ERR_SOURCE); /* read first */
+ u64 info = read_csr(dd, SEND_EGRESS_ERR_INFO);
+ char buf[96];
+
+ /* clear down all observed info as quickly as possible after read */
+ write_csr(dd, SEND_EGRESS_ERR_INFO, info);
+
+ dd_dev_info(dd,
+ "Egress Error Info: 0x%llx, %s Egress Error Src 0x%llx\n",
+ info, egress_err_info_string(buf, sizeof(buf), info), src);
+
+ /* Eventually add other counters for each bit */
+
+ if (info & SEND_EGRESS_ERR_INFO_TOO_LONG_IB_PACKET_ERR_SMASK) {
+ if (ppd->port_xmit_discards < ~(u64)0)
+ ppd->port_xmit_discards++;
+ }
+}
+
+/*
+ * Input value is a bit position within the SEND_EGRESS_ERR_STATUS
+ * register. Does it represent a 'port inactive' error?
+ */
+static inline int port_inactive_err(u64 posn)
+{
+ return (posn >= SEES(TX_LINKDOWN) &&
+ posn <= SEES(TX_INCORRECT_LINK_STATE));
+}
+
+/*
+ * Input value is a bit position within the SEND_EGRESS_ERR_STATUS
+ * register. Does it represent a 'disallowed packet' error?
+ */
+static inline int disallowed_pkt_err(u64 posn)
+{
+ return (posn >= SEES(TX_SDMA0_DISALLOWED_PACKET) &&
+ posn <= SEES(TX_SDMA15_DISALLOWED_PACKET));
+}
+
+static void handle_egress_err(struct hfi1_devdata *dd, u32 unused, u64 reg)
+{
+ u64 reg_copy = reg, handled = 0;
+ char buf[96];
+
+ if (reg & ALL_TXE_EGRESS_FREEZE_ERR)
+ start_freeze_handling(dd->pport, 0);
+ if (is_a0(dd) && (reg &
+ SEND_EGRESS_ERR_STATUS_TX_CREDIT_RETURN_VL_ERR_SMASK)
+ && (dd->icode != ICODE_FUNCTIONAL_SIMULATOR))
+ start_freeze_handling(dd->pport, 0);
+
+ while (reg_copy) {
+ int posn = fls64(reg_copy);
+ /*
+ * fls64() returns a 1-based offset, but we generally
+ * want 0-based offsets.
+ */
+ int shift = posn - 1;
+
+ if (port_inactive_err(shift)) {
+ count_port_inactive(dd);
+ handled |= (1ULL << shift);
+ } else if (disallowed_pkt_err(shift)) {
+ handle_send_egress_err_info(dd);
+ handled |= (1ULL << shift);
+ }
+ clear_bit(shift, (unsigned long *)®_copy);
+ }
+
+ reg &= ~handled;
+
+ if (reg)
+ dd_dev_info(dd, "Egress Error: %s\n",
+ egress_err_status_string(buf, sizeof(buf), reg));
+}
+
+static void handle_txe_err(struct hfi1_devdata *dd, u32 unused, u64 reg)
+{
+ char buf[96];
+
+ dd_dev_info(dd, "Send Error: %s\n",
+ send_err_status_string(buf, sizeof(buf), reg));
+
+}
+
+/*
+ * The maximum number of times the error clear down will loop before
+ * blocking a repeating error. This value is arbitrary.
+ */
+#define MAX_CLEAR_COUNT 20
+
+/*
+ * Clear and handle an error register. All error interrupts are funneled
+ * through here to have a central location to correctly handle single-
+ * or multi-shot errors.
+ *
+ * For non per-context registers, call this routine with a context value
+ * of 0 so the per-context offset is zero.
+ *
+ * If the handler loops too many times, assume that something is wrong
+ * and can't be fixed, so mask the error bits.
+ */
+static void interrupt_clear_down(struct hfi1_devdata *dd,
+ u32 context,
+ const struct err_reg_info *eri)
+{
+ u64 reg;
+ u32 count;
+
+ /* read in a loop until no more errors are seen */
+ count = 0;
+ while (1) {
+ reg = read_kctxt_csr(dd, context, eri->status);
+ if (reg == 0)
+ break;
+ write_kctxt_csr(dd, context, eri->clear, reg);
+ if (likely(eri->handler))
+ eri->handler(dd, context, reg);
+ count++;
+ if (count > MAX_CLEAR_COUNT) {
+ u64 mask;
+
+ dd_dev_err(dd, "Repeating %s bits 0x%llx - masking\n",
+ eri->desc, reg);
+ /*
+ * Read-modify-write so any other masked bits
+ * remain masked.
+ */
+ mask = read_kctxt_csr(dd, context, eri->mask);
+ mask &= ~reg;
+ write_kctxt_csr(dd, context, eri->mask, mask);
+ break;
+ }
+ }
+}
+
+/*
+ * CCE block "misc" interrupt. Source is < 16.
+ */
+static void is_misc_err_int(struct hfi1_devdata *dd, unsigned int source)
+{
+ const struct err_reg_info *eri = &misc_errs[source];
+
+ if (eri->handler) {
+ interrupt_clear_down(dd, 0, eri);
+ } else {
+ dd_dev_err(dd, "Unexpected misc interrupt (%u) - reserved\n",
+ source);
+ }
+}
+
+static char *send_context_err_status_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags,
+ sc_err_status_flags, ARRAY_SIZE(sc_err_status_flags));
+}
+
+/*
+ * Send context error interrupt. Source (hw_context) is < 160.
+ *
+ * All send context errors cause the send context to halt. The normal
+ * clear-down mechanism cannot be used because we cannot clear the
+ * error bits until several other long-running items are done first.
+ * This is OK because with the context halted, nothing else is going
+ * to happen on it anyway.
+ */
+static void is_sendctxt_err_int(struct hfi1_devdata *dd,
+ unsigned int hw_context)
+{
+ struct send_context_info *sci;
+ struct send_context *sc;
+ char flags[96];
+ u64 status;
+ u32 sw_index;
+
+ sw_index = dd->hw_to_sw[hw_context];
+ if (sw_index >= dd->num_send_contexts) {
+ dd_dev_err(dd,
+ "out of range sw index %u for send context %u\n",
+ sw_index, hw_context);
+ return;
+ }
+ sci = &dd->send_contexts[sw_index];
+ sc = sci->sc;
+ if (!sc) {
+ dd_dev_err(dd, "%s: context %u(%u): no sc?\n", __func__,
+ sw_index, hw_context);
+ return;
+ }
+
+ /* tell the software that a halt has begun */
+ sc_stop(sc, SCF_HALTED);
+
+ status = read_kctxt_csr(dd, hw_context, SEND_CTXT_ERR_STATUS);
+
+ dd_dev_info(dd, "Send Context %u(%u) Error: %s\n", sw_index, hw_context,
+ send_context_err_status_string(flags, sizeof(flags), status));
+
+ if (status & SEND_CTXT_ERR_STATUS_PIO_DISALLOWED_PACKET_ERR_SMASK)
+ handle_send_egress_err_info(dd);
+
+ /*
+ * Automatically restart halted kernel contexts out of interrupt
+ * context. User contexts must ask the driver to restart the context.
+ */
+ if (sc->type != SC_USER)
+ queue_work(dd->pport->hfi1_wq, &sc->halt_work);
+}
+
+static void handle_sdma_eng_err(struct hfi1_devdata *dd,
+ unsigned int source, u64 status)
+{
+ struct sdma_engine *sde;
+
+ sde = &dd->per_sdma[source];
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(sde->dd, "CONFIG SDMA(%u) %s:%d %s()\n", sde->this_idx,
+ slashstrip(__FILE__), __LINE__, __func__);
+ dd_dev_err(sde->dd, "CONFIG SDMA(%u) source: %u status 0x%llx\n",
+ sde->this_idx, source, (unsigned long long)status);
+#endif
+ sdma_engine_error(sde, status);
+}
+
+/*
+ * CCE block SDMA error interrupt. Source is < 16.
+ */
+static void is_sdma_eng_err_int(struct hfi1_devdata *dd, unsigned int source)
+{
+#ifdef CONFIG_SDMA_VERBOSITY
+ struct sdma_engine *sde = &dd->per_sdma[source];
+
+ dd_dev_err(dd, "CONFIG SDMA(%u) %s:%d %s()\n", sde->this_idx,
+ slashstrip(__FILE__), __LINE__, __func__);
+ dd_dev_err(dd, "CONFIG SDMA(%u) source: %u\n", sde->this_idx,
+ source);
+ sdma_dumpstate(sde);
+#endif
+ interrupt_clear_down(dd, source, &sdma_eng_err);
+}
+
+/*
+ * CCE block "various" interrupt. Source is < 8.
+ */
+static void is_various_int(struct hfi1_devdata *dd, unsigned int source)
+{
+ const struct err_reg_info *eri = &various_err[source];
+
+ /*
+ * TCritInt cannot go through interrupt_clear_down()
+ * because it is not a second tier interrupt. The handler
+ * should be called directly.
+ */
+ if (source == TCRIT_INT_SOURCE)
+ handle_temp_err(dd);
+ else if (eri->handler)
+ interrupt_clear_down(dd, 0, eri);
+ else
+ dd_dev_info(dd,
+ "%s: Unimplemented/reserved interrupt %d\n",
+ __func__, source);
+}
+
+static void handle_qsfp_int(struct hfi1_devdata *dd, u32 src_ctx, u64 reg)
+{
+ /* source is always zero */
+ struct hfi1_pportdata *ppd = dd->pport;
+ unsigned long flags;
+ u64 qsfp_int_mgmt = (u64)(QSFP_HFI0_INT_N | QSFP_HFI0_MODPRST_N);
+
+ if (reg & QSFP_HFI0_MODPRST_N) {
+
+ dd_dev_info(dd, "%s: ModPresent triggered QSFP interrupt\n",
+ __func__);
+
+ if (!qsfp_mod_present(ppd)) {
+ ppd->driver_link_ready = 0;
+ /*
+ * Cable removed, reset all our information about the
+ * cache and cable capabilities
+ */
+
+ spin_lock_irqsave(&ppd->qsfp_info.qsfp_lock, flags);
+ /*
+ * We don't set cache_refresh_required here as we expect
+ * an interrupt when a cable is inserted
+ */
+ ppd->qsfp_info.cache_valid = 0;
+ ppd->qsfp_info.qsfp_interrupt_functional = 0;
+ spin_unlock_irqrestore(&ppd->qsfp_info.qsfp_lock,
+ flags);
+ write_csr(dd,
+ dd->hfi1_id ?
+ ASIC_QSFP2_INVERT :
+ ASIC_QSFP1_INVERT,
+ qsfp_int_mgmt);
+ if (ppd->host_link_state == HLS_DN_POLL) {
+ /*
+ * The link is still in POLL. This means
+ * that the normal link down processing
+ * will not happen. We have to do it here
+ * before turning the DC off.
+ */
+ queue_work(ppd->hfi1_wq, &ppd->link_down_work);
+ }
+ } else {
+ spin_lock_irqsave(&ppd->qsfp_info.qsfp_lock, flags);
+ ppd->qsfp_info.cache_valid = 0;
+ ppd->qsfp_info.cache_refresh_required = 1;
+ spin_unlock_irqrestore(&ppd->qsfp_info.qsfp_lock,
+ flags);
+
+ qsfp_int_mgmt &= ~(u64)QSFP_HFI0_MODPRST_N;
+ write_csr(dd,
+ dd->hfi1_id ?
+ ASIC_QSFP2_INVERT :
+ ASIC_QSFP1_INVERT,
+ qsfp_int_mgmt);
+ }
+ }
+
+ if (reg & QSFP_HFI0_INT_N) {
+
+ dd_dev_info(dd, "%s: IntN triggered QSFP interrupt\n",
+ __func__);
+ spin_lock_irqsave(&ppd->qsfp_info.qsfp_lock, flags);
+ ppd->qsfp_info.check_interrupt_flags = 1;
+ ppd->qsfp_info.qsfp_interrupt_functional = 1;
+ spin_unlock_irqrestore(&ppd->qsfp_info.qsfp_lock, flags);
+ }
+
+ /* Schedule the QSFP work only if there is a cable attached. */
+ if (qsfp_mod_present(ppd))
+ queue_work(ppd->hfi1_wq, &ppd->qsfp_info.qsfp_work);
+}
+
+static int request_host_lcb_access(struct hfi1_devdata *dd)
+{
+ int ret;
+
+ ret = do_8051_command(dd, HCMD_MISC,
+ (u64)HCMD_MISC_REQUEST_LCB_ACCESS << LOAD_DATA_FIELD_ID_SHIFT,
+ NULL);
+ if (ret != HCMD_SUCCESS) {
+ dd_dev_err(dd, "%s: command failed with error %d\n",
+ __func__, ret);
+ }
+ return ret == HCMD_SUCCESS ? 0 : -EBUSY;
+}
+
+static int request_8051_lcb_access(struct hfi1_devdata *dd)
+{
+ int ret;
+
+ ret = do_8051_command(dd, HCMD_MISC,
+ (u64)HCMD_MISC_GRANT_LCB_ACCESS << LOAD_DATA_FIELD_ID_SHIFT,
+ NULL);
+ if (ret != HCMD_SUCCESS) {
+ dd_dev_err(dd, "%s: command failed with error %d\n",
+ __func__, ret);
+ }
+ return ret == HCMD_SUCCESS ? 0 : -EBUSY;
+}
+
+/*
+ * Set the LCB selector - allow host access. The DCC selector always
+ * points to the host.
+ */
+static inline void set_host_lcb_access(struct hfi1_devdata *dd)
+{
+ write_csr(dd, DC_DC8051_CFG_CSR_ACCESS_SEL,
+ DC_DC8051_CFG_CSR_ACCESS_SEL_DCC_SMASK
+ | DC_DC8051_CFG_CSR_ACCESS_SEL_LCB_SMASK);
+}
+
+/*
+ * Clear the LCB selector - allow 8051 access. The DCC selector always
+ * points to the host.
+ */
+static inline void set_8051_lcb_access(struct hfi1_devdata *dd)
+{
+ write_csr(dd, DC_DC8051_CFG_CSR_ACCESS_SEL,
+ DC_DC8051_CFG_CSR_ACCESS_SEL_DCC_SMASK);
+}
+
+/*
+ * Acquire LCB access from the 8051. If the host already has access,
+ * just increment a counter. Otherwise, inform the 8051 that the
+ * host is taking access.
+ *
+ * Returns:
+ * 0 on success
+ * -EBUSY if the 8051 has control and cannot be disturbed
+ * -errno if unable to acquire access from the 8051
+ */
+int acquire_lcb_access(struct hfi1_devdata *dd, int sleep_ok)
+{
+ struct hfi1_pportdata *ppd = dd->pport;
+ int ret = 0;
+
+ /*
+ * Use the host link state lock so the operation of this routine
+ * { link state check, selector change, count increment } can occur
+ * as a unit against a link state change. Otherwise there is a
+ * race between the state change and the count increment.
+ */
+ if (sleep_ok) {
+ mutex_lock(&ppd->hls_lock);
+ } else {
+ while (mutex_trylock(&ppd->hls_lock) == EBUSY)
+ udelay(1);
+ }
+
+ /* this access is valid only when the link is up */
+ if ((ppd->host_link_state & HLS_UP) == 0) {
+ dd_dev_info(dd, "%s: link state %s not up\n",
+ __func__, link_state_name(ppd->host_link_state));
+ ret = -EBUSY;
+ goto done;
+ }
+
+ if (dd->lcb_access_count == 0) {
+ ret = request_host_lcb_access(dd);
+ if (ret) {
+ dd_dev_err(dd,
+ "%s: unable to acquire LCB access, err %d\n",
+ __func__, ret);
+ goto done;
+ }
+ set_host_lcb_access(dd);
+ }
+ dd->lcb_access_count++;
+done:
+ mutex_unlock(&ppd->hls_lock);
+ return ret;
+}
+
+/*
+ * Release LCB access by decrementing the use count. If the count is moving
+ * from 1 to 0, inform 8051 that it has control back.
+ *
+ * Returns:
+ * 0 on success
+ * -errno if unable to release access to the 8051
+ */
+int release_lcb_access(struct hfi1_devdata *dd, int sleep_ok)
+{
+ int ret = 0;
+
+ /*
+ * Use the host link state lock because the acquire needed it.
+ * Here, we only need to keep { selector change, count decrement }
+ * as a unit.
+ */
+ if (sleep_ok) {
+ mutex_lock(&dd->pport->hls_lock);
+ } else {
+ while (mutex_trylock(&dd->pport->hls_lock) == EBUSY)
+ udelay(1);
+ }
+
+ if (dd->lcb_access_count == 0) {
+ dd_dev_err(dd, "%s: LCB access count is zero. Skipping.\n",
+ __func__);
+ goto done;
+ }
+
+ if (dd->lcb_access_count == 1) {
+ set_8051_lcb_access(dd);
+ ret = request_8051_lcb_access(dd);
+ if (ret) {
+ dd_dev_err(dd,
+ "%s: unable to release LCB access, err %d\n",
+ __func__, ret);
+ /* restore host access if the grant didn't work */
+ set_host_lcb_access(dd);
+ goto done;
+ }
+ }
+ dd->lcb_access_count--;
+done:
+ mutex_unlock(&dd->pport->hls_lock);
+ return ret;
+}
+
+/*
+ * Initialize LCB access variables and state. Called during driver load,
+ * after most of the initialization is finished.
+ *
+ * The DC default is LCB access on for the host. The driver defaults to
+ * leaving access to the 8051. Assign access now - this constrains the call
+ * to this routine to be after all LCB set-up is done. In particular, after
+ * hf1_init_dd() -> set_up_interrupts() -> clear_all_interrupts()
+ */
+static void init_lcb_access(struct hfi1_devdata *dd)
+{
+ dd->lcb_access_count = 0;
+}
+
+/*
+ * Write a response back to a 8051 request.
+ */
+static void hreq_response(struct hfi1_devdata *dd, u8 return_code, u16 rsp_data)
+{
+ write_csr(dd, DC_DC8051_CFG_EXT_DEV_0,
+ DC_DC8051_CFG_EXT_DEV_0_COMPLETED_SMASK
+ | (u64)return_code << DC_DC8051_CFG_EXT_DEV_0_RETURN_CODE_SHIFT
+ | (u64)rsp_data << DC_DC8051_CFG_EXT_DEV_0_RSP_DATA_SHIFT);
+}
+
+/*
+ * Handle requests from the 8051.
+ */
+static void handle_8051_request(struct hfi1_devdata *dd)
+{
+ u64 reg;
+ u16 data;
+ u8 type;
+
+ reg = read_csr(dd, DC_DC8051_CFG_EXT_DEV_1);
+ if ((reg & DC_DC8051_CFG_EXT_DEV_1_REQ_NEW_SMASK) == 0)
+ return; /* no request */
+
+ /* zero out COMPLETED so the response is seen */
+ write_csr(dd, DC_DC8051_CFG_EXT_DEV_0, 0);
+
+ /* extract request details */
+ type = (reg >> DC_DC8051_CFG_EXT_DEV_1_REQ_TYPE_SHIFT)
+ & DC_DC8051_CFG_EXT_DEV_1_REQ_TYPE_MASK;
+ data = (reg >> DC_DC8051_CFG_EXT_DEV_1_REQ_DATA_SHIFT)
+ & DC_DC8051_CFG_EXT_DEV_1_REQ_DATA_MASK;
+
+ switch (type) {
+ case HREQ_LOAD_CONFIG:
+ case HREQ_SAVE_CONFIG:
+ case HREQ_READ_CONFIG:
+ case HREQ_SET_TX_EQ_ABS:
+ case HREQ_SET_TX_EQ_REL:
+ case HREQ_ENABLE:
+ dd_dev_info(dd, "8051 request: request 0x%x not supported\n",
+ type);
+ hreq_response(dd, HREQ_NOT_SUPPORTED, 0);
+ break;
+
+ case HREQ_CONFIG_DONE:
+ hreq_response(dd, HREQ_SUCCESS, 0);
+ break;
+
+ case HREQ_INTERFACE_TEST:
+ hreq_response(dd, HREQ_SUCCESS, data);
+ break;
+
+ default:
+ dd_dev_err(dd, "8051 request: unknown request 0x%x\n", type);
+ hreq_response(dd, HREQ_NOT_SUPPORTED, 0);
+ break;
+ }
+}
+
+static void write_global_credit(struct hfi1_devdata *dd,
+ u8 vau, u16 total, u16 shared)
+{
+ write_csr(dd, SEND_CM_GLOBAL_CREDIT,
+ ((u64)total
+ << SEND_CM_GLOBAL_CREDIT_TOTAL_CREDIT_LIMIT_SHIFT)
+ | ((u64)shared
+ << SEND_CM_GLOBAL_CREDIT_SHARED_LIMIT_SHIFT)
+ | ((u64)vau << SEND_CM_GLOBAL_CREDIT_AU_SHIFT));
+}
+
+/*
+ * Set up initial VL15 credits of the remote. Assumes the rest of
+ * the CM credit registers are zero from a previous global or credit reset .
+ */
+void set_up_vl15(struct hfi1_devdata *dd, u8 vau, u16 vl15buf)
+{
+ /* leave shared count at zero for both global and VL15 */
+ write_global_credit(dd, vau, vl15buf, 0);
+
+ /* We may need some credits for another VL when sending packets
+ * with the snoop interface. Dividing it down the middle for VL15
+ * and VL0 should suffice.
+ */
+ if (unlikely(dd->hfi1_snoop.mode_flag == HFI1_PORT_SNOOP_MODE)) {
+ write_csr(dd, SEND_CM_CREDIT_VL15, (u64)(vl15buf >> 1)
+ << SEND_CM_CREDIT_VL15_DEDICATED_LIMIT_VL_SHIFT);
+ write_csr(dd, SEND_CM_CREDIT_VL, (u64)(vl15buf >> 1)
+ << SEND_CM_CREDIT_VL_DEDICATED_LIMIT_VL_SHIFT);
+ } else {
+ write_csr(dd, SEND_CM_CREDIT_VL15, (u64)vl15buf
+ << SEND_CM_CREDIT_VL15_DEDICATED_LIMIT_VL_SHIFT);
+ }
+}
+
+/*
+ * Zero all credit details from the previous connection and
+ * reset the CM manager's internal counters.
+ */
+void reset_link_credits(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /* remove all previous VL credit limits */
+ for (i = 0; i < TXE_NUM_DATA_VL; i++)
+ write_csr(dd, SEND_CM_CREDIT_VL + (8*i), 0);
+ write_csr(dd, SEND_CM_CREDIT_VL15, 0);
+ write_global_credit(dd, 0, 0, 0);
+ /* reset the CM block */
+ pio_send_control(dd, PSC_CM_RESET);
+}
+
+/* convert a vCU to a CU */
+static u32 vcu_to_cu(u8 vcu)
+{
+ return 1 << vcu;
+}
+
+/* convert a CU to a vCU */
+static u8 cu_to_vcu(u32 cu)
+{
+ return ilog2(cu);
+}
+
+/* convert a vAU to an AU */
+static u32 vau_to_au(u8 vau)
+{
+ return 8 * (1 << vau);
+}
+
+static void set_linkup_defaults(struct hfi1_pportdata *ppd)
+{
+ ppd->sm_trap_qp = 0x0;
+ ppd->sa_qp = 0x1;
+}
+
+/*
+ * Graceful LCB shutdown. This leaves the LCB FIFOs in reset.
+ */
+static void lcb_shutdown(struct hfi1_devdata *dd, int abort)
+{
+ u64 reg;
+
+ /* clear lcb run: LCB_CFG_RUN.EN = 0 */
+ write_csr(dd, DC_LCB_CFG_RUN, 0);
+ /* set tx fifo reset: LCB_CFG_TX_FIFOS_RESET.VAL = 1 */
+ write_csr(dd, DC_LCB_CFG_TX_FIFOS_RESET,
+ 1ull << DC_LCB_CFG_TX_FIFOS_RESET_VAL_SHIFT);
+ /* set dcc reset csr: DCC_CFG_RESET.{reset_lcb,reset_rx_fpe} = 1 */
+ dd->lcb_err_en = read_csr(dd, DC_LCB_ERR_EN);
+ reg = read_csr(dd, DCC_CFG_RESET);
+ write_csr(dd, DCC_CFG_RESET,
+ reg
+ | (1ull << DCC_CFG_RESET_RESET_LCB_SHIFT)
+ | (1ull << DCC_CFG_RESET_RESET_RX_FPE_SHIFT));
+ (void) read_csr(dd, DCC_CFG_RESET); /* make sure the write completed */
+ if (!abort) {
+ udelay(1); /* must hold for the longer of 16cclks or 20ns */
+ write_csr(dd, DCC_CFG_RESET, reg);
+ write_csr(dd, DC_LCB_ERR_EN, dd->lcb_err_en);
+ }
+}
+
+/*
+ * This routine should be called after the link has been transitioned to
+ * OFFLINE (OFFLINE state has the side effect of putting the SerDes into
+ * reset).
+ *
+ * The expectation is that the caller of this routine would have taken
+ * care of properly transitioning the link into the correct state.
+ */
+static void dc_shutdown(struct hfi1_devdata *dd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dd->dc8051_lock, flags);
+ if (dd->dc_shutdown) {
+ spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+ return;
+ }
+ dd->dc_shutdown = 1;
+ spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+ /* Shutdown the LCB */
+ lcb_shutdown(dd, 1);
+ /* Going to OFFLINE would have causes the 8051 to put the
+ * SerDes into reset already. Just need to shut down the 8051,
+ * itself. */
+ write_csr(dd, DC_DC8051_CFG_RST, 0x1);
+}
+
+/* Calling this after the DC has been brought out of reset should not
+ * do any damage. */
+static void dc_start(struct hfi1_devdata *dd)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&dd->dc8051_lock, flags);
+ if (!dd->dc_shutdown)
+ goto done;
+ spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+ /* Take the 8051 out of reset */
+ write_csr(dd, DC_DC8051_CFG_RST, 0ull);
+ /* Wait until 8051 is ready */
+ ret = wait_fm_ready(dd, TIMEOUT_8051_START);
+ if (ret) {
+ dd_dev_err(dd, "%s: timeout starting 8051 firmware\n",
+ __func__);
+ }
+ /* Take away reset for LCB and RX FPE (set in lcb_shutdown). */
+ write_csr(dd, DCC_CFG_RESET, 0x10);
+ /* lcb_shutdown() with abort=1 does not restore these */
+ write_csr(dd, DC_LCB_ERR_EN, dd->lcb_err_en);
+ spin_lock_irqsave(&dd->dc8051_lock, flags);
+ dd->dc_shutdown = 0;
+done:
+ spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+}
+
+/*
+ * These LCB adjustments are for the Aurora SerDes core in the FPGA.
+ */
+static void adjust_lcb_for_fpga_serdes(struct hfi1_devdata *dd)
+{
+ u64 rx_radr, tx_radr;
+ u32 version;
+
+ if (dd->icode != ICODE_FPGA_EMULATION)
+ return;
+
+ /*
+ * These LCB defaults on emulator _s are good, nothing to do here:
+ * LCB_CFG_TX_FIFOS_RADR
+ * LCB_CFG_RX_FIFOS_RADR
+ * LCB_CFG_LN_DCLK
+ * LCB_CFG_IGNORE_LOST_RCLK
+ */
+ if (is_emulator_s(dd))
+ return;
+ /* else this is _p */
+
+ version = emulator_rev(dd);
+ if (!is_a0(dd))
+ version = 0x2d; /* all B0 use 0x2d or higher settings */
+
+ if (version <= 0x12) {
+ /* release 0x12 and below */
+
+ /*
+ * LCB_CFG_RX_FIFOS_RADR.RST_VAL = 0x9
+ * LCB_CFG_RX_FIFOS_RADR.OK_TO_JUMP_VAL = 0x9
+ * LCB_CFG_RX_FIFOS_RADR.DO_NOT_JUMP_VAL = 0xa
+ */
+ rx_radr =
+ 0xaull << DC_LCB_CFG_RX_FIFOS_RADR_DO_NOT_JUMP_VAL_SHIFT
+ | 0x9ull << DC_LCB_CFG_RX_FIFOS_RADR_OK_TO_JUMP_VAL_SHIFT
+ | 0x9ull << DC_LCB_CFG_RX_FIFOS_RADR_RST_VAL_SHIFT;
+ /*
+ * LCB_CFG_TX_FIFOS_RADR.ON_REINIT = 0 (default)
+ * LCB_CFG_TX_FIFOS_RADR.RST_VAL = 6
+ */
+ tx_radr = 6ull << DC_LCB_CFG_TX_FIFOS_RADR_RST_VAL_SHIFT;
+ } else if (version <= 0x18) {
+ /* release 0x13 up to 0x18 */
+ /* LCB_CFG_RX_FIFOS_RADR = 0x988 */
+ rx_radr =
+ 0x9ull << DC_LCB_CFG_RX_FIFOS_RADR_DO_NOT_JUMP_VAL_SHIFT
+ | 0x8ull << DC_LCB_CFG_RX_FIFOS_RADR_OK_TO_JUMP_VAL_SHIFT
+ | 0x8ull << DC_LCB_CFG_RX_FIFOS_RADR_RST_VAL_SHIFT;
+ tx_radr = 7ull << DC_LCB_CFG_TX_FIFOS_RADR_RST_VAL_SHIFT;
+ } else if (version == 0x19) {
+ /* release 0x19 */
+ /* LCB_CFG_RX_FIFOS_RADR = 0xa99 */
+ rx_radr =
+ 0xAull << DC_LCB_CFG_RX_FIFOS_RADR_DO_NOT_JUMP_VAL_SHIFT
+ | 0x9ull << DC_LCB_CFG_RX_FIFOS_RADR_OK_TO_JUMP_VAL_SHIFT
+ | 0x9ull << DC_LCB_CFG_RX_FIFOS_RADR_RST_VAL_SHIFT;
+ tx_radr = 3ull << DC_LCB_CFG_TX_FIFOS_RADR_RST_VAL_SHIFT;
+ } else if (version == 0x1a) {
+ /* release 0x1a */
+ /* LCB_CFG_RX_FIFOS_RADR = 0x988 */
+ rx_radr =
+ 0x9ull << DC_LCB_CFG_RX_FIFOS_RADR_DO_NOT_JUMP_VAL_SHIFT
+ | 0x8ull << DC_LCB_CFG_RX_FIFOS_RADR_OK_TO_JUMP_VAL_SHIFT
+ | 0x8ull << DC_LCB_CFG_RX_FIFOS_RADR_RST_VAL_SHIFT;
+ tx_radr = 7ull << DC_LCB_CFG_TX_FIFOS_RADR_RST_VAL_SHIFT;
+ write_csr(dd, DC_LCB_CFG_LN_DCLK, 1ull);
+ } else {
+ /* release 0x1b and higher */
+ /* LCB_CFG_RX_FIFOS_RADR = 0x877 */
+ rx_radr =
+ 0x8ull << DC_LCB_CFG_RX_FIFOS_RADR_DO_NOT_JUMP_VAL_SHIFT
+ | 0x7ull << DC_LCB_CFG_RX_FIFOS_RADR_OK_TO_JUMP_VAL_SHIFT
+ | 0x7ull << DC_LCB_CFG_RX_FIFOS_RADR_RST_VAL_SHIFT;
+ tx_radr = 3ull << DC_LCB_CFG_TX_FIFOS_RADR_RST_VAL_SHIFT;
+ }
+
+ write_csr(dd, DC_LCB_CFG_RX_FIFOS_RADR, rx_radr);
+ /* LCB_CFG_IGNORE_LOST_RCLK.EN = 1 */
+ write_csr(dd, DC_LCB_CFG_IGNORE_LOST_RCLK,
+ DC_LCB_CFG_IGNORE_LOST_RCLK_EN_SMASK);
+ write_csr(dd, DC_LCB_CFG_TX_FIFOS_RADR, tx_radr);
+}
+
+/*
+ * Handle a SMA idle message
+ *
+ * This is a work-queue function outside of the interrupt.
+ */
+void handle_sma_message(struct work_struct *work)
+{
+ struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
+ sma_message_work);
+ struct hfi1_devdata *dd = ppd->dd;
+ u64 msg;
+ int ret;
+
+ /* msg is bytes 1-4 of the 40-bit idle message - the command code
+ is stripped off */
+ ret = read_idle_sma(dd, &msg);
+ if (ret)
+ return;
+ dd_dev_info(dd, "%s: SMA message 0x%llx\n", __func__, msg);
+ /*
+ * React to the SMA message. Byte[1] (0 for us) is the command.
+ */
+ switch (msg & 0xff) {
+ case SMA_IDLE_ARM:
+ /*
+ * See OPAv1 table 9-14 - HFI and External Switch Ports Key
+ * State Transitions
+ *
+ * Only expected in INIT or ARMED, discard otherwise.
+ */
+ if (ppd->host_link_state & (HLS_UP_INIT | HLS_UP_ARMED))
+ ppd->neighbor_normal = 1;
+ break;
+ case SMA_IDLE_ACTIVE:
+ /*
+ * See OPAv1 table 9-14 - HFI and External Switch Ports Key
+ * State Transitions
+ *
+ * Can activate the node. Discard otherwise.
+ */
+ if (ppd->host_link_state == HLS_UP_ARMED
+ && ppd->is_active_optimize_enabled) {
+ ppd->neighbor_normal = 1;
+ ret = set_link_state(ppd, HLS_UP_ACTIVE);
+ if (ret)
+ dd_dev_err(
+ dd,
+ "%s: received Active SMA idle message, couldn't set link to Active\n",
+ __func__);
+ }
+ break;
+ default:
+ dd_dev_err(dd,
+ "%s: received unexpected SMA idle message 0x%llx\n",
+ __func__, msg);
+ break;
+ }
+}
+
+static void adjust_rcvctrl(struct hfi1_devdata *dd, u64 add, u64 clear)
+{
+ u64 rcvctrl;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dd->rcvctrl_lock, flags);
+ rcvctrl = read_csr(dd, RCV_CTRL);
+ rcvctrl |= add;
+ rcvctrl &= ~clear;
+ write_csr(dd, RCV_CTRL, rcvctrl);
+ spin_unlock_irqrestore(&dd->rcvctrl_lock, flags);
+}
+
+static inline void add_rcvctrl(struct hfi1_devdata *dd, u64 add)
+{
+ adjust_rcvctrl(dd, add, 0);
+}
+
+static inline void clear_rcvctrl(struct hfi1_devdata *dd, u64 clear)
+{
+ adjust_rcvctrl(dd, 0, clear);
+}
+
+/*
+ * Called from all interrupt handlers to start handling an SPC freeze.
+ */
+void start_freeze_handling(struct hfi1_pportdata *ppd, int flags)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ struct send_context *sc;
+ int i;
+
+ if (flags & FREEZE_SELF)
+ write_csr(dd, CCE_CTRL, CCE_CTRL_SPC_FREEZE_SMASK);
+
+ /* enter frozen mode */
+ dd->flags |= HFI1_FROZEN;
+
+ /* notify all SDMA engines that they are going into a freeze */
+ sdma_freeze_notify(dd, !!(flags & FREEZE_LINK_DOWN));
+
+ /* do halt pre-handling on all enabled send contexts */
+ for (i = 0; i < dd->num_send_contexts; i++) {
+ sc = dd->send_contexts[i].sc;
+ if (sc && (sc->flags & SCF_ENABLED))
+ sc_stop(sc, SCF_FROZEN | SCF_HALTED);
+ }
+
+ /* Send context are frozen. Notify user space */
+ hfi1_set_uevent_bits(ppd, _HFI1_EVENT_FROZEN_BIT);
+
+ if (flags & FREEZE_ABORT) {
+ dd_dev_err(dd,
+ "Aborted freeze recovery. Please REBOOT system\n");
+ return;
+ }
+ /* queue non-interrupt handler */
+ queue_work(ppd->hfi1_wq, &ppd->freeze_work);
+}
+
+/*
+ * Wait until all 4 sub-blocks indicate that they have frozen or unfrozen,
+ * depending on the "freeze" parameter.
+ *
+ * No need to return an error if it times out, our only option
+ * is to proceed anyway.
+ */
+static void wait_for_freeze_status(struct hfi1_devdata *dd, int freeze)
+{
+ unsigned long timeout;
+ u64 reg;
+
+ timeout = jiffies + msecs_to_jiffies(FREEZE_STATUS_TIMEOUT);
+ while (1) {
+ reg = read_csr(dd, CCE_STATUS);
+ if (freeze) {
+ /* waiting until all indicators are set */
+ if ((reg & ALL_FROZE) == ALL_FROZE)
+ return; /* all done */
+ } else {
+ /* waiting until all indicators are clear */
+ if ((reg & ALL_FROZE) == 0)
+ return; /* all done */
+ }
+
+ if (time_after(jiffies, timeout)) {
+ dd_dev_err(dd,
+ "Time out waiting for SPC %sfreeze, bits 0x%llx, expecting 0x%llx, continuing",
+ freeze ? "" : "un",
+ reg & ALL_FROZE,
+ freeze ? ALL_FROZE : 0ull);
+ return;
+ }
+ usleep_range(80, 120);
+ }
+}
+
+/*
+ * Do all freeze handling for the RXE block.
+ */
+static void rxe_freeze(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /* disable port */
+ clear_rcvctrl(dd, RCV_CTRL_RCV_PORT_ENABLE_SMASK);
+
+ /* disable all receive contexts */
+ for (i = 0; i < dd->num_rcv_contexts; i++)
+ hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS, i);
+}
+
+/*
+ * Unfreeze handling for the RXE block - kernel contexts only.
+ * This will also enable the port. User contexts will do unfreeze
+ * handling on a per-context basis as they call into the driver.
+ *
+ */
+static void rxe_kernel_unfreeze(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /* enable all kernel contexts */
+ for (i = 0; i < dd->n_krcv_queues; i++)
+ hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_ENB, i);
+
+ /* enable port */
+ add_rcvctrl(dd, RCV_CTRL_RCV_PORT_ENABLE_SMASK);
+}
+
+/*
+ * Non-interrupt SPC freeze handling.
+ *
+ * This is a work-queue function outside of the triggering interrupt.
+ */
+void handle_freeze(struct work_struct *work)
+{
+ struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
+ freeze_work);
+ struct hfi1_devdata *dd = ppd->dd;
+
+ /* wait for freeze indicators on all affected blocks */
+ dd_dev_info(dd, "Entering SPC freeze\n");
+ wait_for_freeze_status(dd, 1);
+
+ /* SPC is now frozen */
+
+ /* do send PIO freeze steps */
+ pio_freeze(dd);
+
+ /* do send DMA freeze steps */
+ sdma_freeze(dd);
+
+ /* do send egress freeze steps - nothing to do */
+
+ /* do receive freeze steps */
+ rxe_freeze(dd);
+
+ /*
+ * Unfreeze the hardware - clear the freeze, wait for each
+ * block's frozen bit to clear, then clear the frozen flag.
+ */
+ write_csr(dd, CCE_CTRL, CCE_CTRL_SPC_UNFREEZE_SMASK);
+ wait_for_freeze_status(dd, 0);
+
+ if (is_a0(dd)) {
+ write_csr(dd, CCE_CTRL, CCE_CTRL_SPC_FREEZE_SMASK);
+ wait_for_freeze_status(dd, 1);
+ write_csr(dd, CCE_CTRL, CCE_CTRL_SPC_UNFREEZE_SMASK);
+ wait_for_freeze_status(dd, 0);
+ }
+
+ /* do send PIO unfreeze steps for kernel contexts */
+ pio_kernel_unfreeze(dd);
+
+ /* do send DMA unfreeze steps */
+ sdma_unfreeze(dd);
+
+ /* do send egress unfreeze steps - nothing to do */
+
+ /* do receive unfreeze steps for kernel contexts */
+ rxe_kernel_unfreeze(dd);
+
+ /*
+ * The unfreeze procedure touches global device registers when
+ * it disables and re-enables RXE. Mark the device unfrozen
+ * after all that is done so other parts of the driver waiting
+ * for the device to unfreeze don't do things out of order.
+ *
+ * The above implies that the meaning of HFI1_FROZEN flag is
+ * "Device has gone into freeze mode and freeze mode handling
+ * is still in progress."
+ *
+ * The flag will be removed when freeze mode processing has
+ * completed.
+ */
+ dd->flags &= ~HFI1_FROZEN;
+ wake_up(&dd->event_queue);
+
+ /* no longer frozen */
+ dd_dev_err(dd, "Exiting SPC freeze\n");
+}
+
+/*
+ * Handle a link up interrupt from the 8051.
+ *
+ * This is a work-queue function outside of the interrupt.
+ */
+void handle_link_up(struct work_struct *work)
+{
+ struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
+ link_up_work);
+ set_link_state(ppd, HLS_UP_INIT);
+
+ /* cache the read of DC_LCB_STS_ROUND_TRIP_LTP_CNT */
+ read_ltp_rtt(ppd->dd);
+ /*
+ * OPA specifies that certain counters are cleared on a transition
+ * to link up, so do that.
+ */
+ clear_linkup_counters(ppd->dd);
+ /*
+ * And (re)set link up default values.
+ */
+ set_linkup_defaults(ppd);
+
+ /* enforce link speed enabled */
+ if ((ppd->link_speed_active & ppd->link_speed_enabled) == 0) {
+ /* oops - current speed is not enabled, bounce */
+ dd_dev_err(ppd->dd,
+ "Link speed active 0x%x is outside enabled 0x%x, downing link\n",
+ ppd->link_speed_active, ppd->link_speed_enabled);
+ set_link_down_reason(ppd, OPA_LINKDOWN_REASON_SPEED_POLICY, 0,
+ OPA_LINKDOWN_REASON_SPEED_POLICY);
+ set_link_state(ppd, HLS_DN_OFFLINE);
+ start_link(ppd);
+ }
+}
+
+/* Several pieces of LNI information were cached for SMA in ppd.
+ * Reset these on link down */
+static void reset_neighbor_info(struct hfi1_pportdata *ppd)
+{
+ ppd->neighbor_guid = 0;
+ ppd->neighbor_port_number = 0;
+ ppd->neighbor_type = 0;
+ ppd->neighbor_fm_security = 0;
+}
+
+/*
+ * Handle a link down interrupt from the 8051.
+ *
+ * This is a work-queue function outside of the interrupt.
+ */
+void handle_link_down(struct work_struct *work)
+{
+ u8 lcl_reason, neigh_reason = 0;
+ struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
+ link_down_work);
+
+ /* go offline first, then deal with reasons */
+ set_link_state(ppd, HLS_DN_OFFLINE);
+
+ lcl_reason = 0;
+ read_planned_down_reason_code(ppd->dd, &neigh_reason);
+
+ /*
+ * If no reason, assume peer-initiated but missed
+ * LinkGoingDown idle flits.
+ */
+ if (neigh_reason == 0)
+ lcl_reason = OPA_LINKDOWN_REASON_NEIGHBOR_UNKNOWN;
+
+ set_link_down_reason(ppd, lcl_reason, neigh_reason, 0);
+
+ reset_neighbor_info(ppd);
+
+ /* disable the port */
+ clear_rcvctrl(ppd->dd, RCV_CTRL_RCV_PORT_ENABLE_SMASK);
+
+ /* If there is no cable attached, turn the DC off. Otherwise,
+ * start the link bring up. */
+ if (!qsfp_mod_present(ppd))
+ dc_shutdown(ppd->dd);
+ else
+ start_link(ppd);
+}
+
+void handle_link_bounce(struct work_struct *work)
+{
+ struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
+ link_bounce_work);
+
+ /*
+ * Only do something if the link is currently up.
+ */
+ if (ppd->host_link_state & HLS_UP) {
+ set_link_state(ppd, HLS_DN_OFFLINE);
+ start_link(ppd);
+ } else {
+ dd_dev_info(ppd->dd, "%s: link not up (%s), nothing to do\n",
+ __func__, link_state_name(ppd->host_link_state));
+ }
+}
+
+/*
+ * Mask conversion: Capability exchange to Port LTP. The capability
+ * exchange has an implicit 16b CRC that is mandatory.
+ */
+static int cap_to_port_ltp(int cap)
+{
+ int port_ltp = PORT_LTP_CRC_MODE_16; /* this mode is mandatory */
+
+ if (cap & CAP_CRC_14B)
+ port_ltp |= PORT_LTP_CRC_MODE_14;
+ if (cap & CAP_CRC_48B)
+ port_ltp |= PORT_LTP_CRC_MODE_48;
+ if (cap & CAP_CRC_12B_16B_PER_LANE)
+ port_ltp |= PORT_LTP_CRC_MODE_PER_LANE;
+
+ return port_ltp;
+}
+
+/*
+ * Convert an OPA Port LTP mask to capability mask
+ */
+int port_ltp_to_cap(int port_ltp)
+{
+ int cap_mask = 0;
+
+ if (port_ltp & PORT_LTP_CRC_MODE_14)
+ cap_mask |= CAP_CRC_14B;
+ if (port_ltp & PORT_LTP_CRC_MODE_48)
+ cap_mask |= CAP_CRC_48B;
+ if (port_ltp & PORT_LTP_CRC_MODE_PER_LANE)
+ cap_mask |= CAP_CRC_12B_16B_PER_LANE;
+
+ return cap_mask;
+}
+
+/*
+ * Convert a single DC LCB CRC mode to an OPA Port LTP mask.
+ */
+static int lcb_to_port_ltp(int lcb_crc)
+{
+ int port_ltp = 0;
+
+ if (lcb_crc == LCB_CRC_12B_16B_PER_LANE)
+ port_ltp = PORT_LTP_CRC_MODE_PER_LANE;
+ else if (lcb_crc == LCB_CRC_48B)
+ port_ltp = PORT_LTP_CRC_MODE_48;
+ else if (lcb_crc == LCB_CRC_14B)
+ port_ltp = PORT_LTP_CRC_MODE_14;
+ else
+ port_ltp = PORT_LTP_CRC_MODE_16;
+
+ return port_ltp;
+}
+
+/*
+ * Our neighbor has indicated that we are allowed to act as a fabric
+ * manager, so place the full management partition key in the second
+ * (0-based) pkey array position (see OPAv1, section 20.2.2.6.8). Note
+ * that we should already have the limited management partition key in
+ * array element 1, and also that the port is not yet up when
+ * add_full_mgmt_pkey() is invoked.
+ */
+static void add_full_mgmt_pkey(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+
+ /* Sanity check - ppd->pkeys[2] should be 0 */
+ if (ppd->pkeys[2] != 0)
+ dd_dev_err(dd, "%s pkey[2] already set to 0x%x, resetting it to 0x%x\n",
+ __func__, ppd->pkeys[2], FULL_MGMT_P_KEY);
+ ppd->pkeys[2] = FULL_MGMT_P_KEY;
+ (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_PKEYS, 0);
+}
+
+/*
+ * Convert the given link width to the OPA link width bitmask.
+ */
+static u16 link_width_to_bits(struct hfi1_devdata *dd, u16 width)
+{
+ switch (width) {
+ case 0:
+ /*
+ * Simulator and quick linkup do not set the width.
+ * Just set it to 4x without complaint.
+ */
+ if (dd->icode == ICODE_FUNCTIONAL_SIMULATOR || quick_linkup)
+ return OPA_LINK_WIDTH_4X;
+ return 0; /* no lanes up */
+ case 1: return OPA_LINK_WIDTH_1X;
+ case 2: return OPA_LINK_WIDTH_2X;
+ case 3: return OPA_LINK_WIDTH_3X;
+ default:
+ dd_dev_info(dd, "%s: invalid width %d, using 4\n",
+ __func__, width);
+ /* fall through */
+ case 4: return OPA_LINK_WIDTH_4X;
+ }
+}
+
+/*
+ * Do a population count on the bottom nibble.
+ */
+static const u8 bit_counts[16] = {
+ 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4
+};
+static inline u8 nibble_to_count(u8 nibble)
+{
+ return bit_counts[nibble & 0xf];
+}
+
+/*
+ * Read the active lane information from the 8051 registers and return
+ * their widths.
+ *
+ * Active lane information is found in these 8051 registers:
+ * enable_lane_tx
+ * enable_lane_rx
+ */
+static void get_link_widths(struct hfi1_devdata *dd, u16 *tx_width,
+ u16 *rx_width)
+{
+ u16 tx, rx;
+ u8 enable_lane_rx;
+ u8 enable_lane_tx;
+ u8 tx_polarity_inversion;
+ u8 rx_polarity_inversion;
+ u8 max_rate;
+
+ /* read the active lanes */
+ read_tx_settings(dd, &enable_lane_tx, &tx_polarity_inversion,
+ &rx_polarity_inversion, &max_rate);
+ read_local_lni(dd, &enable_lane_rx);
+
+ /* convert to counts */
+ tx = nibble_to_count(enable_lane_tx);
+ rx = nibble_to_count(enable_lane_rx);
+
+ /*
+ * Set link_speed_active here, overriding what was set in
+ * handle_verify_cap(). The ASIC 8051 firmware does not correctly
+ * set the max_rate field in handle_verify_cap until v0.19.
+ */
+ if ((dd->icode == ICODE_RTL_SILICON)
+ && (dd->dc8051_ver < dc8051_ver(0, 19))) {
+ /* max_rate: 0 = 12.5G, 1 = 25G */
+ switch (max_rate) {
+ case 0:
+ dd->pport[0].link_speed_active = OPA_LINK_SPEED_12_5G;
+ break;
+ default:
+ dd_dev_err(dd,
+ "%s: unexpected max rate %d, using 25Gb\n",
+ __func__, (int)max_rate);
+ /* fall through */
+ case 1:
+ dd->pport[0].link_speed_active = OPA_LINK_SPEED_25G;
+ break;
+ }
+ }
+
+ dd_dev_info(dd,
+ "Fabric active lanes (width): tx 0x%x (%d), rx 0x%x (%d)\n",
+ enable_lane_tx, tx, enable_lane_rx, rx);
+ *tx_width = link_width_to_bits(dd, tx);
+ *rx_width = link_width_to_bits(dd, rx);
+}
+
+/*
+ * Read verify_cap_local_fm_link_width[1] to obtain the link widths.
+ * Valid after the end of VerifyCap and during LinkUp. Does not change
+ * after link up. I.e. look elsewhere for downgrade information.
+ *
+ * Bits are:
+ * + bits [7:4] contain the number of active transmitters
+ * + bits [3:0] contain the number of active receivers
+ * These are numbers 1 through 4 and can be different values if the
+ * link is asymmetric.
+ *
+ * verify_cap_local_fm_link_width[0] retains its original value.
+ */
+static void get_linkup_widths(struct hfi1_devdata *dd, u16 *tx_width,
+ u16 *rx_width)
+{
+ u16 widths, tx, rx;
+ u8 misc_bits, local_flags;
+ u16 active_tx, active_rx;
+
+ read_vc_local_link_width(dd, &misc_bits, &local_flags, &widths);
+ tx = widths >> 12;
+ rx = (widths >> 8) & 0xf;
+
+ *tx_width = link_width_to_bits(dd, tx);
+ *rx_width = link_width_to_bits(dd, rx);
+
+ /* print the active widths */
+ get_link_widths(dd, &active_tx, &active_rx);
+}
+
+/*
+ * Set ppd->link_width_active and ppd->link_width_downgrade_active using
+ * hardware information when the link first comes up.
+ *
+ * The link width is not available until after VerifyCap.AllFramesReceived
+ * (the trigger for handle_verify_cap), so this is outside that routine
+ * and should be called when the 8051 signals linkup.
+ */
+void get_linkup_link_widths(struct hfi1_pportdata *ppd)
+{
+ u16 tx_width, rx_width;
+
+ /* get end-of-LNI link widths */
+ get_linkup_widths(ppd->dd, &tx_width, &rx_width);
+
+ /* use tx_width as the link is supposed to be symmetric on link up */
+ ppd->link_width_active = tx_width;
+ /* link width downgrade active (LWD.A) starts out matching LW.A */
+ ppd->link_width_downgrade_tx_active = ppd->link_width_active;
+ ppd->link_width_downgrade_rx_active = ppd->link_width_active;
+ /* per OPA spec, on link up LWD.E resets to LWD.S */
+ ppd->link_width_downgrade_enabled = ppd->link_width_downgrade_supported;
+ /* cache the active egress rate (units {10^6 bits/sec]) */
+ ppd->current_egress_rate = active_egress_rate(ppd);
+}
+
+/*
+ * Handle a verify capabilities interrupt from the 8051.
+ *
+ * This is a work-queue function outside of the interrupt.
+ */
+void handle_verify_cap(struct work_struct *work)
+{
+ struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
+ link_vc_work);
+ struct hfi1_devdata *dd = ppd->dd;
+ u64 reg;
+ u8 power_management;
+ u8 continious;
+ u8 vcu;
+ u8 vau;
+ u8 z;
+ u16 vl15buf;
+ u16 link_widths;
+ u16 crc_mask;
+ u16 crc_val;
+ u16 device_id;
+ u16 active_tx, active_rx;
+ u8 partner_supported_crc;
+ u8 remote_tx_rate;
+ u8 device_rev;
+
+ set_link_state(ppd, HLS_VERIFY_CAP);
+
+ lcb_shutdown(dd, 0);
+ adjust_lcb_for_fpga_serdes(dd);
+
+ /*
+ * These are now valid:
+ * remote VerifyCap fields in the general LNI config
+ * CSR DC8051_STS_REMOTE_GUID
+ * CSR DC8051_STS_REMOTE_NODE_TYPE
+ * CSR DC8051_STS_REMOTE_FM_SECURITY
+ * CSR DC8051_STS_REMOTE_PORT_NO
+ */
+
+ read_vc_remote_phy(dd, &power_management, &continious);
+ read_vc_remote_fabric(
+ dd,
+ &vau,
+ &z,
+ &vcu,
+ &vl15buf,
+ &partner_supported_crc);
+ read_vc_remote_link_width(dd, &remote_tx_rate, &link_widths);
+ read_remote_device_id(dd, &device_id, &device_rev);
+ /*
+ * And the 'MgmtAllowed' information, which is exchanged during
+ * LNI, is also be available at this point.
+ */
+ read_mgmt_allowed(dd, &ppd->mgmt_allowed);
+ /* print the active widths */
+ get_link_widths(dd, &active_tx, &active_rx);
+ dd_dev_info(dd,
+ "Peer PHY: power management 0x%x, continuous updates 0x%x\n",
+ (int)power_management, (int)continious);
+ dd_dev_info(dd,
+ "Peer Fabric: vAU %d, Z %d, vCU %d, vl15 credits 0x%x, CRC sizes 0x%x\n",
+ (int)vau,
+ (int)z,
+ (int)vcu,
+ (int)vl15buf,
+ (int)partner_supported_crc);
+ dd_dev_info(dd, "Peer Link Width: tx rate 0x%x, widths 0x%x\n",
+ (u32)remote_tx_rate, (u32)link_widths);
+ dd_dev_info(dd, "Peer Device ID: 0x%04x, Revision 0x%02x\n",
+ (u32)device_id, (u32)device_rev);
+ /*
+ * The peer vAU value just read is the peer receiver value. HFI does
+ * not support a transmit vAU of 0 (AU == 8). We advertised that
+ * with Z=1 in the fabric capabilities sent to the peer. The peer
+ * will see our Z=1, and, if it advertised a vAU of 0, will move its
+ * receive to vAU of 1 (AU == 16). Do the same here. We do not care
+ * about the peer Z value - our sent vAU is 3 (hardwired) and is not
+ * subject to the Z value exception.
+ */
+ if (vau == 0)
+ vau = 1;
+ set_up_vl15(dd, vau, vl15buf);
+
+ /* set up the LCB CRC mode */
+ crc_mask = ppd->port_crc_mode_enabled & partner_supported_crc;
+
+ /* order is important: use the lowest bit in common */
+ if (crc_mask & CAP_CRC_14B)
+ crc_val = LCB_CRC_14B;
+ else if (crc_mask & CAP_CRC_48B)
+ crc_val = LCB_CRC_48B;
+ else if (crc_mask & CAP_CRC_12B_16B_PER_LANE)
+ crc_val = LCB_CRC_12B_16B_PER_LANE;
+ else
+ crc_val = LCB_CRC_16B;
+
+ dd_dev_info(dd, "Final LCB CRC mode: %d\n", (int)crc_val);
+ write_csr(dd, DC_LCB_CFG_CRC_MODE,
+ (u64)crc_val << DC_LCB_CFG_CRC_MODE_TX_VAL_SHIFT);
+
+ /* set (14b only) or clear sideband credit */
+ reg = read_csr(dd, SEND_CM_CTRL);
+ if (crc_val == LCB_CRC_14B && crc_14b_sideband) {
+ write_csr(dd, SEND_CM_CTRL,
+ reg | SEND_CM_CTRL_FORCE_CREDIT_MODE_SMASK);
+ } else {
+ write_csr(dd, SEND_CM_CTRL,
+ reg & ~SEND_CM_CTRL_FORCE_CREDIT_MODE_SMASK);
+ }
+
+ ppd->link_speed_active = 0; /* invalid value */
+ if (dd->dc8051_ver < dc8051_ver(0, 20)) {
+ /* remote_tx_rate: 0 = 12.5G, 1 = 25G */
+ switch (remote_tx_rate) {
+ case 0:
+ ppd->link_speed_active = OPA_LINK_SPEED_12_5G;
+ break;
+ case 1:
+ ppd->link_speed_active = OPA_LINK_SPEED_25G;
+ break;
+ }
+ } else {
+ /* actual rate is highest bit of the ANDed rates */
+ u8 rate = remote_tx_rate & ppd->local_tx_rate;
+
+ if (rate & 2)
+ ppd->link_speed_active = OPA_LINK_SPEED_25G;
+ else if (rate & 1)
+ ppd->link_speed_active = OPA_LINK_SPEED_12_5G;
+ }
+ if (ppd->link_speed_active == 0) {
+ dd_dev_err(dd, "%s: unexpected remote tx rate %d, using 25Gb\n",
+ __func__, (int)remote_tx_rate);
+ ppd->link_speed_active = OPA_LINK_SPEED_25G;
+ }
+
+ /*
+ * Cache the values of the supported, enabled, and active
+ * LTP CRC modes to return in 'portinfo' queries. But the bit
+ * flags that are returned in the portinfo query differ from
+ * what's in the link_crc_mask, crc_sizes, and crc_val
+ * variables. Convert these here.
+ */
+ ppd->port_ltp_crc_mode = cap_to_port_ltp(link_crc_mask) << 8;
+ /* supported crc modes */
+ ppd->port_ltp_crc_mode |=
+ cap_to_port_ltp(ppd->port_crc_mode_enabled) << 4;
+ /* enabled crc modes */
+ ppd->port_ltp_crc_mode |= lcb_to_port_ltp(crc_val);
+ /* active crc mode */
+
+ /* set up the remote credit return table */
+ assign_remote_cm_au_table(dd, vcu);
+
+ /*
+ * The LCB is reset on entry to handle_verify_cap(), so this must
+ * be applied on every link up.
+ *
+ * Adjust LCB error kill enable to kill the link if
+ * these RBUF errors are seen:
+ * REPLAY_BUF_MBE_SMASK
+ * FLIT_INPUT_BUF_MBE_SMASK
+ */
+ if (is_a0(dd)) { /* fixed in B0 */
+ reg = read_csr(dd, DC_LCB_CFG_LINK_KILL_EN);
+ reg |= DC_LCB_CFG_LINK_KILL_EN_REPLAY_BUF_MBE_SMASK
+ | DC_LCB_CFG_LINK_KILL_EN_FLIT_INPUT_BUF_MBE_SMASK;
+ write_csr(dd, DC_LCB_CFG_LINK_KILL_EN, reg);
+ }
+
+ /* pull LCB fifos out of reset - all fifo clocks must be stable */
+ write_csr(dd, DC_LCB_CFG_TX_FIFOS_RESET, 0);
+
+ /* give 8051 access to the LCB CSRs */
+ write_csr(dd, DC_LCB_ERR_EN, 0); /* mask LCB errors */
+ set_8051_lcb_access(dd);
+
+ ppd->neighbor_guid =
+ read_csr(dd, DC_DC8051_STS_REMOTE_GUID);
+ ppd->neighbor_port_number = read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) &
+ DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK;
+ ppd->neighbor_type =
+ read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) &
+ DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK;
+ ppd->neighbor_fm_security =
+ read_csr(dd, DC_DC8051_STS_REMOTE_FM_SECURITY) &
+ DC_DC8051_STS_LOCAL_FM_SECURITY_DISABLED_MASK;
+ dd_dev_info(dd,
+ "Neighbor Guid: %llx Neighbor type %d MgmtAllowed %d FM security bypass %d\n",
+ ppd->neighbor_guid, ppd->neighbor_type,
+ ppd->mgmt_allowed, ppd->neighbor_fm_security);
+ if (ppd->mgmt_allowed)
+ add_full_mgmt_pkey(ppd);
+
+ /* tell the 8051 to go to LinkUp */
+ set_link_state(ppd, HLS_GOING_UP);
+}
+
+/*
+ * Apply the link width downgrade enabled policy against the current active
+ * link widths.
+ *
+ * Called when the enabled policy changes or the active link widths change.
+ */
+void apply_link_downgrade_policy(struct hfi1_pportdata *ppd, int refresh_widths)
+{
+ int skip = 1;
+ int do_bounce = 0;
+ u16 lwde = ppd->link_width_downgrade_enabled;
+ u16 tx, rx;
+
+ mutex_lock(&ppd->hls_lock);
+ /* only apply if the link is up */
+ if (ppd->host_link_state & HLS_UP)
+ skip = 0;
+ mutex_unlock(&ppd->hls_lock);
+ if (skip)
+ return;
+
+ if (refresh_widths) {
+ get_link_widths(ppd->dd, &tx, &rx);
+ ppd->link_width_downgrade_tx_active = tx;
+ ppd->link_width_downgrade_rx_active = rx;
+ }
+
+ if (lwde == 0) {
+ /* downgrade is disabled */
+
+ /* bounce if not at starting active width */
+ if ((ppd->link_width_active !=
+ ppd->link_width_downgrade_tx_active)
+ || (ppd->link_width_active !=
+ ppd->link_width_downgrade_rx_active)) {
+ dd_dev_err(ppd->dd,
+ "Link downgrade is disabled and link has downgraded, downing link\n");
+ dd_dev_err(ppd->dd,
+ " original 0x%x, tx active 0x%x, rx active 0x%x\n",
+ ppd->link_width_active,
+ ppd->link_width_downgrade_tx_active,
+ ppd->link_width_downgrade_rx_active);
+ do_bounce = 1;
+ }
+ } else if ((lwde & ppd->link_width_downgrade_tx_active) == 0
+ || (lwde & ppd->link_width_downgrade_rx_active) == 0) {
+ /* Tx or Rx is outside the enabled policy */
+ dd_dev_err(ppd->dd,
+ "Link is outside of downgrade allowed, downing link\n");
+ dd_dev_err(ppd->dd,
+ " enabled 0x%x, tx active 0x%x, rx active 0x%x\n",
+ lwde,
+ ppd->link_width_downgrade_tx_active,
+ ppd->link_width_downgrade_rx_active);
+ do_bounce = 1;
+ }
+
+ if (do_bounce) {
+ set_link_down_reason(ppd, OPA_LINKDOWN_REASON_WIDTH_POLICY, 0,
+ OPA_LINKDOWN_REASON_WIDTH_POLICY);
+ set_link_state(ppd, HLS_DN_OFFLINE);
+ start_link(ppd);
+ }
+}
+
+/*
+ * Handle a link downgrade interrupt from the 8051.
+ *
+ * This is a work-queue function outside of the interrupt.
+ */
+void handle_link_downgrade(struct work_struct *work)
+{
+ struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
+ link_downgrade_work);
+
+ dd_dev_info(ppd->dd, "8051: Link width downgrade\n");
+ apply_link_downgrade_policy(ppd, 1);
+}
+
+static char *dcc_err_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags, dcc_err_flags,
+ ARRAY_SIZE(dcc_err_flags));
+}
+
+static char *lcb_err_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags, lcb_err_flags,
+ ARRAY_SIZE(lcb_err_flags));
+}
+
+static char *dc8051_err_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags, dc8051_err_flags,
+ ARRAY_SIZE(dc8051_err_flags));
+}
+
+static char *dc8051_info_err_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags, dc8051_info_err_flags,
+ ARRAY_SIZE(dc8051_info_err_flags));
+}
+
+static char *dc8051_info_host_msg_string(char *buf, int buf_len, u64 flags)
+{
+ return flag_string(buf, buf_len, flags, dc8051_info_host_msg_flags,
+ ARRAY_SIZE(dc8051_info_host_msg_flags));
+}
+
+static void handle_8051_interrupt(struct hfi1_devdata *dd, u32 unused, u64 reg)
+{
+ struct hfi1_pportdata *ppd = dd->pport;
+ u64 info, err, host_msg;
+ int queue_link_down = 0;
+ char buf[96];
+
+ /* look at the flags */
+ if (reg & DC_DC8051_ERR_FLG_SET_BY_8051_SMASK) {
+ /* 8051 information set by firmware */
+ /* read DC8051_DBG_ERR_INFO_SET_BY_8051 for details */
+ info = read_csr(dd, DC_DC8051_DBG_ERR_INFO_SET_BY_8051);
+ err = (info >> DC_DC8051_DBG_ERR_INFO_SET_BY_8051_ERROR_SHIFT)
+ & DC_DC8051_DBG_ERR_INFO_SET_BY_8051_ERROR_MASK;
+ host_msg = (info >>
+ DC_DC8051_DBG_ERR_INFO_SET_BY_8051_HOST_MSG_SHIFT)
+ & DC_DC8051_DBG_ERR_INFO_SET_BY_8051_HOST_MSG_MASK;
+
+ /*
+ * Handle error flags.
+ */
+ if (err & FAILED_LNI) {
+ /*
+ * LNI error indications are cleared by the 8051
+ * only when starting polling. Only pay attention
+ * to them when in the states that occur during
+ * LNI.
+ */
+ if (ppd->host_link_state
+ & (HLS_DN_POLL | HLS_VERIFY_CAP | HLS_GOING_UP)) {
+ queue_link_down = 1;
+ dd_dev_info(dd, "Link error: %s\n",
+ dc8051_info_err_string(buf,
+ sizeof(buf),
+ err & FAILED_LNI));
+ }
+ err &= ~(u64)FAILED_LNI;
+ }
+ if (err) {
+ /* report remaining errors, but do not do anything */
+ dd_dev_err(dd, "8051 info error: %s\n",
+ dc8051_info_err_string(buf, sizeof(buf), err));
+ }
+
+ /*
+ * Handle host message flags.
+ */
+ if (host_msg & HOST_REQ_DONE) {
+ /*
+ * Presently, the driver does a busy wait for
+ * host requests to complete. This is only an
+ * informational message.
+ * NOTE: The 8051 clears the host message
+ * information *on the next 8051 command*.
+ * Therefore, when linkup is achieved,
+ * this flag will still be set.
+ */
+ host_msg &= ~(u64)HOST_REQ_DONE;
+ }
+ if (host_msg & BC_SMA_MSG) {
+ queue_work(ppd->hfi1_wq, &ppd->sma_message_work);
+ host_msg &= ~(u64)BC_SMA_MSG;
+ }
+ if (host_msg & LINKUP_ACHIEVED) {
+ dd_dev_info(dd, "8051: Link up\n");
+ queue_work(ppd->hfi1_wq, &ppd->link_up_work);
+ host_msg &= ~(u64)LINKUP_ACHIEVED;
+ }
+ if (host_msg & EXT_DEVICE_CFG_REQ) {
+ handle_8051_request(dd);
+ host_msg &= ~(u64)EXT_DEVICE_CFG_REQ;
+ }
+ if (host_msg & VERIFY_CAP_FRAME) {
+ queue_work(ppd->hfi1_wq, &ppd->link_vc_work);
+ host_msg &= ~(u64)VERIFY_CAP_FRAME;
+ }
+ if (host_msg & LINK_GOING_DOWN) {
+ const char *extra = "";
+ /* no downgrade action needed if going down */
+ if (host_msg & LINK_WIDTH_DOWNGRADED) {
+ host_msg &= ~(u64)LINK_WIDTH_DOWNGRADED;
+ extra = " (ignoring downgrade)";
+ }
+ dd_dev_info(dd, "8051: Link down%s\n", extra);
+ queue_link_down = 1;
+ host_msg &= ~(u64)LINK_GOING_DOWN;
+ }
+ if (host_msg & LINK_WIDTH_DOWNGRADED) {
+ queue_work(ppd->hfi1_wq, &ppd->link_downgrade_work);
+ host_msg &= ~(u64)LINK_WIDTH_DOWNGRADED;
+ }
+ if (host_msg) {
+ /* report remaining messages, but do not do anything */
+ dd_dev_info(dd, "8051 info host message: %s\n",
+ dc8051_info_host_msg_string(buf, sizeof(buf),
+ host_msg));
+ }
+
+ reg &= ~DC_DC8051_ERR_FLG_SET_BY_8051_SMASK;
+ }
+ if (reg & DC_DC8051_ERR_FLG_LOST_8051_HEART_BEAT_SMASK) {
+ /*
+ * Lost the 8051 heartbeat. If this happens, we
+ * receive constant interrupts about it. Disable
+ * the interrupt after the first.
+ */
+ dd_dev_err(dd, "Lost 8051 heartbeat\n");
+ write_csr(dd, DC_DC8051_ERR_EN,
+ read_csr(dd, DC_DC8051_ERR_EN)
+ & ~DC_DC8051_ERR_EN_LOST_8051_HEART_BEAT_SMASK);
+
+ reg &= ~DC_DC8051_ERR_FLG_LOST_8051_HEART_BEAT_SMASK;
+ }
+ if (reg) {
+ /* report the error, but do not do anything */
+ dd_dev_err(dd, "8051 error: %s\n",
+ dc8051_err_string(buf, sizeof(buf), reg));
+ }
+
+ if (queue_link_down) {
+ /* if the link is already going down or disabled, do not
+ * queue another */
+ if ((ppd->host_link_state
+ & (HLS_GOING_OFFLINE|HLS_LINK_COOLDOWN))
+ || ppd->link_enabled == 0) {
+ dd_dev_info(dd, "%s: not queuing link down\n",
+ __func__);
+ } else {
+ queue_work(ppd->hfi1_wq, &ppd->link_down_work);
+ }
+ }
+}
+
+static const char * const fm_config_txt[] = {
+[0] =
+ "BadHeadDist: Distance violation between two head flits",
+[1] =
+ "BadTailDist: Distance violation between two tail flits",
+[2] =
+ "BadCtrlDist: Distance violation between two credit control flits",
+[3] =
+ "BadCrdAck: Credits return for unsupported VL",
+[4] =
+ "UnsupportedVLMarker: Received VL Marker",
+[5] =
+ "BadPreempt: Exceeded the preemption nesting level",
+[6] =
+ "BadControlFlit: Received unsupported control flit",
+/* no 7 */
+[8] =
+ "UnsupportedVLMarker: Received VL Marker for unconfigured or disabled VL",
+};
+
+static const char * const port_rcv_txt[] = {
+[1] =
+ "BadPktLen: Illegal PktLen",
+[2] =
+ "PktLenTooLong: Packet longer than PktLen",
+[3] =
+ "PktLenTooShort: Packet shorter than PktLen",
+[4] =
+ "BadSLID: Illegal SLID (0, using multicast as SLID, does not include security validation of SLID)",
+[5] =
+ "BadDLID: Illegal DLID (0, doesn't match HFI)",
+[6] =
+ "BadL2: Illegal L2 opcode",
+[7] =
+ "BadSC: Unsupported SC",
+[9] =
+ "BadRC: Illegal RC",
+[11] =
+ "PreemptError: Preempting with same VL",
+[12] =
+ "PreemptVL15: Preempting a VL15 packet",
+};
+
+#define OPA_LDR_FMCONFIG_OFFSET 16
+#define OPA_LDR_PORTRCV_OFFSET 0
+static void handle_dcc_err(struct hfi1_devdata *dd, u32 unused, u64 reg)
+{
+ u64 info, hdr0, hdr1;
+ const char *extra;
+ char buf[96];
+ struct hfi1_pportdata *ppd = dd->pport;
+ u8 lcl_reason = 0;
+ int do_bounce = 0;
+
+ if (reg & DCC_ERR_FLG_UNCORRECTABLE_ERR_SMASK) {
+ if (!(dd->err_info_uncorrectable & OPA_EI_STATUS_SMASK)) {
+ info = read_csr(dd, DCC_ERR_INFO_UNCORRECTABLE);
+ dd->err_info_uncorrectable = info & OPA_EI_CODE_SMASK;
+ /* set status bit */
+ dd->err_info_uncorrectable |= OPA_EI_STATUS_SMASK;
+ }
+ reg &= ~DCC_ERR_FLG_UNCORRECTABLE_ERR_SMASK;
+ }
+
+ if (reg & DCC_ERR_FLG_LINK_ERR_SMASK) {
+ struct hfi1_pportdata *ppd = dd->pport;
+ /* this counter saturates at (2^32) - 1 */
+ if (ppd->link_downed < (u32)UINT_MAX)
+ ppd->link_downed++;
+ reg &= ~DCC_ERR_FLG_LINK_ERR_SMASK;
+ }
+
+ if (reg & DCC_ERR_FLG_FMCONFIG_ERR_SMASK) {
+ u8 reason_valid = 1;
+
+ info = read_csr(dd, DCC_ERR_INFO_FMCONFIG);
+ if (!(dd->err_info_fmconfig & OPA_EI_STATUS_SMASK)) {
+ dd->err_info_fmconfig = info & OPA_EI_CODE_SMASK;
+ /* set status bit */
+ dd->err_info_fmconfig |= OPA_EI_STATUS_SMASK;
+ }
+ switch (info) {
+ case 0:
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ extra = fm_config_txt[info];
+ break;
+ case 8:
+ extra = fm_config_txt[info];
+ if (ppd->port_error_action &
+ OPA_PI_MASK_FM_CFG_UNSUPPORTED_VL_MARKER) {
+ do_bounce = 1;
+ /*
+ * lcl_reason cannot be derived from info
+ * for this error
+ */
+ lcl_reason =
+ OPA_LINKDOWN_REASON_UNSUPPORTED_VL_MARKER;
+ }
+ break;
+ default:
+ reason_valid = 0;
+ snprintf(buf, sizeof(buf), "reserved%lld", info);
+ extra = buf;
+ break;
+ }
+
+ if (reason_valid && !do_bounce) {
+ do_bounce = ppd->port_error_action &
+ (1 << (OPA_LDR_FMCONFIG_OFFSET + info));
+ lcl_reason = info + OPA_LINKDOWN_REASON_BAD_HEAD_DIST;
+ }
+
+ /* just report this */
+ dd_dev_info(dd, "DCC Error: fmconfig error: %s\n", extra);
+ reg &= ~DCC_ERR_FLG_FMCONFIG_ERR_SMASK;
+ }
+
+ if (reg & DCC_ERR_FLG_RCVPORT_ERR_SMASK) {
+ u8 reason_valid = 1;
+
+ info = read_csr(dd, DCC_ERR_INFO_PORTRCV);
+ hdr0 = read_csr(dd, DCC_ERR_INFO_PORTRCV_HDR0);
+ hdr1 = read_csr(dd, DCC_ERR_INFO_PORTRCV_HDR1);
+ if (!(dd->err_info_rcvport.status_and_code &
+ OPA_EI_STATUS_SMASK)) {
+ dd->err_info_rcvport.status_and_code =
+ info & OPA_EI_CODE_SMASK;
+ /* set status bit */
+ dd->err_info_rcvport.status_and_code |=
+ OPA_EI_STATUS_SMASK;
+ /* save first 2 flits in the packet that caused
+ * the error */
+ dd->err_info_rcvport.packet_flit1 = hdr0;
+ dd->err_info_rcvport.packet_flit2 = hdr1;
+ }
+ switch (info) {
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ case 7:
+ case 9:
+ case 11:
+ case 12:
+ extra = port_rcv_txt[info];
+ break;
+ default:
+ reason_valid = 0;
+ snprintf(buf, sizeof(buf), "reserved%lld", info);
+ extra = buf;
+ break;
+ }
+
+ if (reason_valid && !do_bounce) {
+ do_bounce = ppd->port_error_action &
+ (1 << (OPA_LDR_PORTRCV_OFFSET + info));
+ lcl_reason = info + OPA_LINKDOWN_REASON_RCV_ERROR_0;
+ }
+
+ /* just report this */
+ dd_dev_info(dd, "DCC Error: PortRcv error: %s\n", extra);
+ dd_dev_info(dd, " hdr0 0x%llx, hdr1 0x%llx\n",
+ hdr0, hdr1);
+
+ reg &= ~DCC_ERR_FLG_RCVPORT_ERR_SMASK;
+ }
+
+ if (reg & DCC_ERR_FLG_EN_CSR_ACCESS_BLOCKED_UC_SMASK) {
+ /* informative only */
+ dd_dev_info(dd, "8051 access to LCB blocked\n");
+ reg &= ~DCC_ERR_FLG_EN_CSR_ACCESS_BLOCKED_UC_SMASK;
+ }
+ if (reg & DCC_ERR_FLG_EN_CSR_ACCESS_BLOCKED_HOST_SMASK) {
+ /* informative only */
+ dd_dev_info(dd, "host access to LCB blocked\n");
+ reg &= ~DCC_ERR_FLG_EN_CSR_ACCESS_BLOCKED_HOST_SMASK;
+ }
+
+ /* report any remaining errors */
+ if (reg)
+ dd_dev_info(dd, "DCC Error: %s\n",
+ dcc_err_string(buf, sizeof(buf), reg));
+
+ if (lcl_reason == 0)
+ lcl_reason = OPA_LINKDOWN_REASON_UNKNOWN;
+
+ if (do_bounce) {
+ dd_dev_info(dd, "%s: PortErrorAction bounce\n", __func__);
+ set_link_down_reason(ppd, lcl_reason, 0, lcl_reason);
+ queue_work(ppd->hfi1_wq, &ppd->link_bounce_work);
+ }
+}
+
+static void handle_lcb_err(struct hfi1_devdata *dd, u32 unused, u64 reg)
+{
+ char buf[96];
+
+ dd_dev_info(dd, "LCB Error: %s\n",
+ lcb_err_string(buf, sizeof(buf), reg));
+}
+
+/*
+ * CCE block DC interrupt. Source is < 8.
+ */
+static void is_dc_int(struct hfi1_devdata *dd, unsigned int source)
+{
+ const struct err_reg_info *eri = &dc_errs[source];
+
+ if (eri->handler) {
+ interrupt_clear_down(dd, 0, eri);
+ } else if (source == 3 /* dc_lbm_int */) {
+ /*
+ * This indicates that a parity error has occurred on the
+ * address/control lines presented to the LBM. The error
+ * is a single pulse, there is no associated error flag,
+ * and it is non-maskable. This is because if a parity
+ * error occurs on the request the request is dropped.
+ * This should never occur, but it is nice to know if it
+ * ever does.
+ */
+ dd_dev_err(dd, "Parity error in DC LBM block\n");
+ } else {
+ dd_dev_err(dd, "Invalid DC interrupt %u\n", source);
+ }
+}
+
+/*
+ * TX block send credit interrupt. Source is < 160.
+ */
+static void is_send_credit_int(struct hfi1_devdata *dd, unsigned int source)
+{
+ sc_group_release_update(dd, source);
+}
+
+/*
+ * TX block SDMA interrupt. Source is < 48.
+ *
+ * SDMA interrupts are grouped by type:
+ *
+ * 0 - N-1 = SDma
+ * N - 2N-1 = SDmaProgress
+ * 2N - 3N-1 = SDmaIdle
+ */
+static void is_sdma_eng_int(struct hfi1_devdata *dd, unsigned int source)
+{
+ /* what interrupt */
+ unsigned int what = source / TXE_NUM_SDMA_ENGINES;
+ /* which engine */
+ unsigned int which = source % TXE_NUM_SDMA_ENGINES;
+
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(dd, "CONFIG SDMA(%u) %s:%d %s()\n", which,
+ slashstrip(__FILE__), __LINE__, __func__);
+ sdma_dumpstate(&dd->per_sdma[which]);
+#endif
+
+ if (likely(what < 3 && which < dd->num_sdma)) {
+ sdma_engine_interrupt(&dd->per_sdma[which], 1ull << source);
+ } else {
+ /* should not happen */
+ dd_dev_err(dd, "Invalid SDMA interrupt 0x%x\n", source);
+ }
+}
+
+/*
+ * RX block receive available interrupt. Source is < 160.
+ */
+static void is_rcv_avail_int(struct hfi1_devdata *dd, unsigned int source)
+{
+ struct hfi1_ctxtdata *rcd;
+ char *err_detail;
+
+ if (likely(source < dd->num_rcv_contexts)) {
+ rcd = dd->rcd[source];
+ if (rcd) {
+ if (source < dd->first_user_ctxt)
+ rcd->do_interrupt(rcd);
+ else
+ handle_user_interrupt(rcd);
+ return; /* OK */
+ }
+ /* received an interrupt, but no rcd */
+ err_detail = "dataless";
+ } else {
+ /* received an interrupt, but are not using that context */
+ err_detail = "out of range";
+ }
+ dd_dev_err(dd, "unexpected %s receive available context interrupt %u\n",
+ err_detail, source);
+}
+
+/*
+ * RX block receive urgent interrupt. Source is < 160.
+ */
+static void is_rcv_urgent_int(struct hfi1_devdata *dd, unsigned int source)
+{
+ struct hfi1_ctxtdata *rcd;
+ char *err_detail;
+
+ if (likely(source < dd->num_rcv_contexts)) {
+ rcd = dd->rcd[source];
+ if (rcd) {
+ /* only pay attention to user urgent interrupts */
+ if (source >= dd->first_user_ctxt)
+ handle_user_interrupt(rcd);
+ return; /* OK */
+ }
+ /* received an interrupt, but no rcd */
+ err_detail = "dataless";
+ } else {
+ /* received an interrupt, but are not using that context */
+ err_detail = "out of range";
+ }
+ dd_dev_err(dd, "unexpected %s receive urgent context interrupt %u\n",
+ err_detail, source);
+}
+
+/*
+ * Reserved range interrupt. Should not be called in normal operation.
+ */
+static void is_reserved_int(struct hfi1_devdata *dd, unsigned int source)
+{
+ char name[64];
+
+ dd_dev_err(dd, "unexpected %s interrupt\n",
+ is_reserved_name(name, sizeof(name), source));
+}
+
+static const struct is_table is_table[] = {
+/* start end
+ name func interrupt func */
+{ IS_GENERAL_ERR_START, IS_GENERAL_ERR_END,
+ is_misc_err_name, is_misc_err_int },
+{ IS_SDMAENG_ERR_START, IS_SDMAENG_ERR_END,
+ is_sdma_eng_err_name, is_sdma_eng_err_int },
+{ IS_SENDCTXT_ERR_START, IS_SENDCTXT_ERR_END,
+ is_sendctxt_err_name, is_sendctxt_err_int },
+{ IS_SDMA_START, IS_SDMA_END,
+ is_sdma_eng_name, is_sdma_eng_int },
+{ IS_VARIOUS_START, IS_VARIOUS_END,
+ is_various_name, is_various_int },
+{ IS_DC_START, IS_DC_END,
+ is_dc_name, is_dc_int },
+{ IS_RCVAVAIL_START, IS_RCVAVAIL_END,
+ is_rcv_avail_name, is_rcv_avail_int },
+{ IS_RCVURGENT_START, IS_RCVURGENT_END,
+ is_rcv_urgent_name, is_rcv_urgent_int },
+{ IS_SENDCREDIT_START, IS_SENDCREDIT_END,
+ is_send_credit_name, is_send_credit_int},
+{ IS_RESERVED_START, IS_RESERVED_END,
+ is_reserved_name, is_reserved_int},
+};
+
+/*
+ * Interrupt source interrupt - called when the given source has an interrupt.
+ * Source is a bit index into an array of 64-bit integers.
+ */
+static void is_interrupt(struct hfi1_devdata *dd, unsigned int source)
+{
+ const struct is_table *entry;
+
+ /* avoids a double compare by walking the table in-order */
+ for (entry = &is_table[0]; entry->is_name; entry++) {
+ if (source < entry->end) {
+ trace_hfi1_interrupt(dd, entry, source);
+ entry->is_int(dd, source - entry->start);
+ return;
+ }
+ }
+ /* fell off the end */
+ dd_dev_err(dd, "invalid interrupt source %u\n", source);
+}
+
+/*
+ * General interrupt handler. This is able to correctly handle
+ * all interrupts in case INTx is used.
+ */
+static irqreturn_t general_interrupt(int irq, void *data)
+{
+ struct hfi1_devdata *dd = data;
+ u64 regs[CCE_NUM_INT_CSRS];
+ u32 bit;
+ int i;
+
+ this_cpu_inc(*dd->int_counter);
+
+ /* phase 1: scan and clear all handled interrupts */
+ for (i = 0; i < CCE_NUM_INT_CSRS; i++) {
+ if (dd->gi_mask[i] == 0) {
+ regs[i] = 0; /* used later */
+ continue;
+ }
+ regs[i] = read_csr(dd, CCE_INT_STATUS + (8 * i)) &
+ dd->gi_mask[i];
+ /* only clear if anything is set */
+ if (regs[i])
+ write_csr(dd, CCE_INT_CLEAR + (8 * i), regs[i]);
+ }
+
+ /* phase 2: call the appropriate handler */
+ for_each_set_bit(bit, (unsigned long *)®s[0],
+ CCE_NUM_INT_CSRS*64) {
+ is_interrupt(dd, bit);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t sdma_interrupt(int irq, void *data)
+{
+ struct sdma_engine *sde = data;
+ struct hfi1_devdata *dd = sde->dd;
+ u64 status;
+
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(dd, "CONFIG SDMA(%u) %s:%d %s()\n", sde->this_idx,
+ slashstrip(__FILE__), __LINE__, __func__);
+ sdma_dumpstate(sde);
+#endif
+
+ this_cpu_inc(*dd->int_counter);
+
+ /* This read_csr is really bad in the hot path */
+ status = read_csr(dd,
+ CCE_INT_STATUS + (8*(IS_SDMA_START/64)))
+ & sde->imask;
+ if (likely(status)) {
+ /* clear the interrupt(s) */
+ write_csr(dd,
+ CCE_INT_CLEAR + (8*(IS_SDMA_START/64)),
+ status);
+
+ /* handle the interrupt(s) */
+ sdma_engine_interrupt(sde, status);
+ } else
+ dd_dev_err(dd, "SDMA engine %u interrupt, but no status bits set\n",
+ sde->this_idx);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * NOTE: this routine expects to be on its own MSI-X interrupt. If
+ * multiple receive contexts share the same MSI-X interrupt, then this
+ * routine must check for who received it.
+ */
+static irqreturn_t receive_context_interrupt(int irq, void *data)
+{
+ struct hfi1_ctxtdata *rcd = data;
+ struct hfi1_devdata *dd = rcd->dd;
+
+ trace_hfi1_receive_interrupt(dd, rcd->ctxt);
+ this_cpu_inc(*dd->int_counter);
+
+ /* clear the interrupt */
+ write_csr(rcd->dd, CCE_INT_CLEAR + (8*rcd->ireg), rcd->imask);
+
+ /* handle the interrupt */
+ rcd->do_interrupt(rcd);
+
+ return IRQ_HANDLED;
+}
+
+/* ========================================================================= */
+
+u32 read_physical_state(struct hfi1_devdata *dd)
+{
+ u64 reg;
+
+ reg = read_csr(dd, DC_DC8051_STS_CUR_STATE);
+ return (reg >> DC_DC8051_STS_CUR_STATE_PORT_SHIFT)
+ & DC_DC8051_STS_CUR_STATE_PORT_MASK;
+}
+
+static u32 read_logical_state(struct hfi1_devdata *dd)
+{
+ u64 reg;
+
+ reg = read_csr(dd, DCC_CFG_PORT_CONFIG);
+ return (reg >> DCC_CFG_PORT_CONFIG_LINK_STATE_SHIFT)
+ & DCC_CFG_PORT_CONFIG_LINK_STATE_MASK;
+}
+
+static void set_logical_state(struct hfi1_devdata *dd, u32 chip_lstate)
+{
+ u64 reg;
+
+ reg = read_csr(dd, DCC_CFG_PORT_CONFIG);
+ /* clear current state, set new state */
+ reg &= ~DCC_CFG_PORT_CONFIG_LINK_STATE_SMASK;
+ reg |= (u64)chip_lstate << DCC_CFG_PORT_CONFIG_LINK_STATE_SHIFT;
+ write_csr(dd, DCC_CFG_PORT_CONFIG, reg);
+}
+
+/*
+ * Use the 8051 to read a LCB CSR.
+ */
+static int read_lcb_via_8051(struct hfi1_devdata *dd, u32 addr, u64 *data)
+{
+ u32 regno;
+ int ret;
+
+ if (dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
+ if (acquire_lcb_access(dd, 0) == 0) {
+ *data = read_csr(dd, addr);
+ release_lcb_access(dd, 0);
+ return 0;
+ }
+ return -EBUSY;
+ }
+
+ /* register is an index of LCB registers: (offset - base) / 8 */
+ regno = (addr - DC_LCB_CFG_RUN) >> 3;
+ ret = do_8051_command(dd, HCMD_READ_LCB_CSR, regno, data);
+ if (ret != HCMD_SUCCESS)
+ return -EBUSY;
+ return 0;
+}
+
+/*
+ * Read an LCB CSR. Access may not be in host control, so check.
+ * Return 0 on success, -EBUSY on failure.
+ */
+int read_lcb_csr(struct hfi1_devdata *dd, u32 addr, u64 *data)
+{
+ struct hfi1_pportdata *ppd = dd->pport;
+
+ /* if up, go through the 8051 for the value */
+ if (ppd->host_link_state & HLS_UP)
+ return read_lcb_via_8051(dd, addr, data);
+ /* if going up or down, no access */
+ if (ppd->host_link_state & (HLS_GOING_UP | HLS_GOING_OFFLINE))
+ return -EBUSY;
+ /* otherwise, host has access */
+ *data = read_csr(dd, addr);
+ return 0;
+}
+
+/*
+ * Use the 8051 to write a LCB CSR.
+ */
+static int write_lcb_via_8051(struct hfi1_devdata *dd, u32 addr, u64 data)
+{
+
+ if (acquire_lcb_access(dd, 0) == 0) {
+ write_csr(dd, addr, data);
+ release_lcb_access(dd, 0);
+ return 0;
+ }
+ return -EBUSY;
+}
+
+/*
+ * Write an LCB CSR. Access may not be in host control, so check.
+ * Return 0 on success, -EBUSY on failure.
+ */
+int write_lcb_csr(struct hfi1_devdata *dd, u32 addr, u64 data)
+{
+ struct hfi1_pportdata *ppd = dd->pport;
+
+ /* if up, go through the 8051 for the value */
+ if (ppd->host_link_state & HLS_UP)
+ return write_lcb_via_8051(dd, addr, data);
+ /* if going up or down, no access */
+ if (ppd->host_link_state & (HLS_GOING_UP | HLS_GOING_OFFLINE))
+ return -EBUSY;
+ /* otherwise, host has access */
+ write_csr(dd, addr, data);
+ return 0;
+}
+
+/*
+ * Returns:
+ * < 0 = Linux error, not able to get access
+ * > 0 = 8051 command RETURN_CODE
+ */
+static int do_8051_command(
+ struct hfi1_devdata *dd,
+ u32 type,
+ u64 in_data,
+ u64 *out_data)
+{
+ u64 reg, completed;
+ int return_code;
+ unsigned long flags;
+ unsigned long timeout;
+
+ hfi1_cdbg(DC8051, "type %d, data 0x%012llx", type, in_data);
+
+ /*
+ * Alternative to holding the lock for a long time:
+ * - keep busy wait - have other users bounce off
+ */
+ spin_lock_irqsave(&dd->dc8051_lock, flags);
+
+ /* We can't send any commands to the 8051 if it's in reset */
+ if (dd->dc_shutdown) {
+ return_code = -ENODEV;
+ goto fail;
+ }
+
+ /*
+ * If an 8051 host command timed out previously, then the 8051 is
+ * stuck.
+ *
+ * On first timeout, attempt to reset and restart the entire DC
+ * block (including 8051). (Is this too big of a hammer?)
+ *
+ * If the 8051 times out a second time, the reset did not bring it
+ * back to healthy life. In that case, fail any subsequent commands.
+ */
+ if (dd->dc8051_timed_out) {
+ if (dd->dc8051_timed_out > 1) {
+ dd_dev_err(dd,
+ "Previous 8051 host command timed out, skipping command %u\n",
+ type);
+ return_code = -ENXIO;
+ goto fail;
+ }
+ spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+ dc_shutdown(dd);
+ dc_start(dd);
+ spin_lock_irqsave(&dd->dc8051_lock, flags);
+ }
+
+ /*
+ * If there is no timeout, then the 8051 command interface is
+ * waiting for a command.
+ */
+
+ /*
+ * Do two writes: the first to stabilize the type and req_data, the
+ * second to activate.
+ */
+ reg = ((u64)type & DC_DC8051_CFG_HOST_CMD_0_REQ_TYPE_MASK)
+ << DC_DC8051_CFG_HOST_CMD_0_REQ_TYPE_SHIFT
+ | (in_data & DC_DC8051_CFG_HOST_CMD_0_REQ_DATA_MASK)
+ << DC_DC8051_CFG_HOST_CMD_0_REQ_DATA_SHIFT;
+ write_csr(dd, DC_DC8051_CFG_HOST_CMD_0, reg);
+ reg |= DC_DC8051_CFG_HOST_CMD_0_REQ_NEW_SMASK;
+ write_csr(dd, DC_DC8051_CFG_HOST_CMD_0, reg);
+
+ /* wait for completion, alternate: interrupt */
+ timeout = jiffies + msecs_to_jiffies(DC8051_COMMAND_TIMEOUT);
+ while (1) {
+ reg = read_csr(dd, DC_DC8051_CFG_HOST_CMD_1);
+ completed = reg & DC_DC8051_CFG_HOST_CMD_1_COMPLETED_SMASK;
+ if (completed)
+ break;
+ if (time_after(jiffies, timeout)) {
+ dd->dc8051_timed_out++;
+ dd_dev_err(dd, "8051 host command %u timeout\n", type);
+ if (out_data)
+ *out_data = 0;
+ return_code = -ETIMEDOUT;
+ goto fail;
+ }
+ udelay(2);
+ }
+
+ if (out_data) {
+ *out_data = (reg >> DC_DC8051_CFG_HOST_CMD_1_RSP_DATA_SHIFT)
+ & DC_DC8051_CFG_HOST_CMD_1_RSP_DATA_MASK;
+ if (type == HCMD_READ_LCB_CSR) {
+ /* top 16 bits are in a different register */
+ *out_data |= (read_csr(dd, DC_DC8051_CFG_EXT_DEV_1)
+ & DC_DC8051_CFG_EXT_DEV_1_REQ_DATA_SMASK)
+ << (48
+ - DC_DC8051_CFG_EXT_DEV_1_REQ_DATA_SHIFT);
+ }
+ }
+ return_code = (reg >> DC_DC8051_CFG_HOST_CMD_1_RETURN_CODE_SHIFT)
+ & DC_DC8051_CFG_HOST_CMD_1_RETURN_CODE_MASK;
+ dd->dc8051_timed_out = 0;
+ /*
+ * Clear command for next user.
+ */
+ write_csr(dd, DC_DC8051_CFG_HOST_CMD_0, 0);
+
+fail:
+ spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+
+ return return_code;
+}
+
+static int set_physical_link_state(struct hfi1_devdata *dd, u64 state)
+{
+ return do_8051_command(dd, HCMD_CHANGE_PHY_STATE, state, NULL);
+}
+
+static int load_8051_config(struct hfi1_devdata *dd, u8 field_id,
+ u8 lane_id, u32 config_data)
+{
+ u64 data;
+ int ret;
+
+ data = (u64)field_id << LOAD_DATA_FIELD_ID_SHIFT
+ | (u64)lane_id << LOAD_DATA_LANE_ID_SHIFT
+ | (u64)config_data << LOAD_DATA_DATA_SHIFT;
+ ret = do_8051_command(dd, HCMD_LOAD_CONFIG_DATA, data, NULL);
+ if (ret != HCMD_SUCCESS) {
+ dd_dev_err(dd,
+ "load 8051 config: field id %d, lane %d, err %d\n",
+ (int)field_id, (int)lane_id, ret);
+ }
+ return ret;
+}
+
+/*
+ * Read the 8051 firmware "registers". Use the RAM directly. Always
+ * set the result, even on error.
+ * Return 0 on success, -errno on failure
+ */
+static int read_8051_config(struct hfi1_devdata *dd, u8 field_id, u8 lane_id,
+ u32 *result)
+{
+ u64 big_data;
+ u32 addr;
+ int ret;
+
+ /* address start depends on the lane_id */
+ if (lane_id < 4)
+ addr = (4 * NUM_GENERAL_FIELDS)
+ + (lane_id * 4 * NUM_LANE_FIELDS);
+ else
+ addr = 0;
+ addr += field_id * 4;
+
+ /* read is in 8-byte chunks, hardware will truncate the address down */
+ ret = read_8051_data(dd, addr, 8, &big_data);
+
+ if (ret == 0) {
+ /* extract the 4 bytes we want */
+ if (addr & 0x4)
+ *result = (u32)(big_data >> 32);
+ else
+ *result = (u32)big_data;
+ } else {
+ *result = 0;
+ dd_dev_err(dd, "%s: direct read failed, lane %d, field %d!\n",
+ __func__, lane_id, field_id);
+ }
+
+ return ret;
+}
+
+static int write_vc_local_phy(struct hfi1_devdata *dd, u8 power_management,
+ u8 continuous)
+{
+ u32 frame;
+
+ frame = continuous << CONTINIOUS_REMOTE_UPDATE_SUPPORT_SHIFT
+ | power_management << POWER_MANAGEMENT_SHIFT;
+ return load_8051_config(dd, VERIFY_CAP_LOCAL_PHY,
+ GENERAL_CONFIG, frame);
+}
+
+static int write_vc_local_fabric(struct hfi1_devdata *dd, u8 vau, u8 z, u8 vcu,
+ u16 vl15buf, u8 crc_sizes)
+{
+ u32 frame;
+
+ frame = (u32)vau << VAU_SHIFT
+ | (u32)z << Z_SHIFT
+ | (u32)vcu << VCU_SHIFT
+ | (u32)vl15buf << VL15BUF_SHIFT
+ | (u32)crc_sizes << CRC_SIZES_SHIFT;
+ return load_8051_config(dd, VERIFY_CAP_LOCAL_FABRIC,
+ GENERAL_CONFIG, frame);
+}
+
+static void read_vc_local_link_width(struct hfi1_devdata *dd, u8 *misc_bits,
+ u8 *flag_bits, u16 *link_widths)
+{
+ u32 frame;
+
+ read_8051_config(dd, VERIFY_CAP_LOCAL_LINK_WIDTH, GENERAL_CONFIG,
+ &frame);
+ *misc_bits = (frame >> MISC_CONFIG_BITS_SHIFT) & MISC_CONFIG_BITS_MASK;
+ *flag_bits = (frame >> LOCAL_FLAG_BITS_SHIFT) & LOCAL_FLAG_BITS_MASK;
+ *link_widths = (frame >> LINK_WIDTH_SHIFT) & LINK_WIDTH_MASK;
+}
+
+static int write_vc_local_link_width(struct hfi1_devdata *dd,
+ u8 misc_bits,
+ u8 flag_bits,
+ u16 link_widths)
+{
+ u32 frame;
+
+ frame = (u32)misc_bits << MISC_CONFIG_BITS_SHIFT
+ | (u32)flag_bits << LOCAL_FLAG_BITS_SHIFT
+ | (u32)link_widths << LINK_WIDTH_SHIFT;
+ return load_8051_config(dd, VERIFY_CAP_LOCAL_LINK_WIDTH, GENERAL_CONFIG,
+ frame);
+}
+
+static int write_local_device_id(struct hfi1_devdata *dd, u16 device_id,
+ u8 device_rev)
+{
+ u32 frame;
+
+ frame = ((u32)device_id << LOCAL_DEVICE_ID_SHIFT)
+ | ((u32)device_rev << LOCAL_DEVICE_REV_SHIFT);
+ return load_8051_config(dd, LOCAL_DEVICE_ID, GENERAL_CONFIG, frame);
+}
+
+static void read_remote_device_id(struct hfi1_devdata *dd, u16 *device_id,
+ u8 *device_rev)
+{
+ u32 frame;
+
+ read_8051_config(dd, REMOTE_DEVICE_ID, GENERAL_CONFIG, &frame);
+ *device_id = (frame >> REMOTE_DEVICE_ID_SHIFT) & REMOTE_DEVICE_ID_MASK;
+ *device_rev = (frame >> REMOTE_DEVICE_REV_SHIFT)
+ & REMOTE_DEVICE_REV_MASK;
+}
+
+void read_misc_status(struct hfi1_devdata *dd, u8 *ver_a, u8 *ver_b)
+{
+ u32 frame;
+
+ read_8051_config(dd, MISC_STATUS, GENERAL_CONFIG, &frame);
+ *ver_a = (frame >> STS_FM_VERSION_A_SHIFT) & STS_FM_VERSION_A_MASK;
+ *ver_b = (frame >> STS_FM_VERSION_B_SHIFT) & STS_FM_VERSION_B_MASK;
+}
+
+static void read_vc_remote_phy(struct hfi1_devdata *dd, u8 *power_management,
+ u8 *continuous)
+{
+ u32 frame;
+
+ read_8051_config(dd, VERIFY_CAP_REMOTE_PHY, GENERAL_CONFIG, &frame);
+ *power_management = (frame >> POWER_MANAGEMENT_SHIFT)
+ & POWER_MANAGEMENT_MASK;
+ *continuous = (frame >> CONTINIOUS_REMOTE_UPDATE_SUPPORT_SHIFT)
+ & CONTINIOUS_REMOTE_UPDATE_SUPPORT_MASK;
+}
+
+static void read_vc_remote_fabric(struct hfi1_devdata *dd, u8 *vau, u8 *z,
+ u8 *vcu, u16 *vl15buf, u8 *crc_sizes)
+{
+ u32 frame;
+
+ read_8051_config(dd, VERIFY_CAP_REMOTE_FABRIC, GENERAL_CONFIG, &frame);
+ *vau = (frame >> VAU_SHIFT) & VAU_MASK;
+ *z = (frame >> Z_SHIFT) & Z_MASK;
+ *vcu = (frame >> VCU_SHIFT) & VCU_MASK;
+ *vl15buf = (frame >> VL15BUF_SHIFT) & VL15BUF_MASK;
+ *crc_sizes = (frame >> CRC_SIZES_SHIFT) & CRC_SIZES_MASK;
+}
+
+static void read_vc_remote_link_width(struct hfi1_devdata *dd,
+ u8 *remote_tx_rate,
+ u16 *link_widths)
+{
+ u32 frame;
+
+ read_8051_config(dd, VERIFY_CAP_REMOTE_LINK_WIDTH, GENERAL_CONFIG,
+ &frame);
+ *remote_tx_rate = (frame >> REMOTE_TX_RATE_SHIFT)
+ & REMOTE_TX_RATE_MASK;
+ *link_widths = (frame >> LINK_WIDTH_SHIFT) & LINK_WIDTH_MASK;
+}
+
+static void read_local_lni(struct hfi1_devdata *dd, u8 *enable_lane_rx)
+{
+ u32 frame;
+
+ read_8051_config(dd, LOCAL_LNI_INFO, GENERAL_CONFIG, &frame);
+ *enable_lane_rx = (frame >> ENABLE_LANE_RX_SHIFT) & ENABLE_LANE_RX_MASK;
+}
+
+static void read_mgmt_allowed(struct hfi1_devdata *dd, u8 *mgmt_allowed)
+{
+ u32 frame;
+
+ read_8051_config(dd, REMOTE_LNI_INFO, GENERAL_CONFIG, &frame);
+ *mgmt_allowed = (frame >> MGMT_ALLOWED_SHIFT) & MGMT_ALLOWED_MASK;
+}
+
+static void read_last_local_state(struct hfi1_devdata *dd, u32 *lls)
+{
+ read_8051_config(dd, LAST_LOCAL_STATE_COMPLETE, GENERAL_CONFIG, lls);
+}
+
+static void read_last_remote_state(struct hfi1_devdata *dd, u32 *lrs)
+{
+ read_8051_config(dd, LAST_REMOTE_STATE_COMPLETE, GENERAL_CONFIG, lrs);
+}
+
+void hfi1_read_link_quality(struct hfi1_devdata *dd, u8 *link_quality)
+{
+ u32 frame;
+ int ret;
+
+ *link_quality = 0;
+ if (dd->pport->host_link_state & HLS_UP) {
+ ret = read_8051_config(dd, LINK_QUALITY_INFO, GENERAL_CONFIG,
+ &frame);
+ if (ret == 0)
+ *link_quality = (frame >> LINK_QUALITY_SHIFT)
+ & LINK_QUALITY_MASK;
+ }
+}
+
+static void read_planned_down_reason_code(struct hfi1_devdata *dd, u8 *pdrrc)
+{
+ u32 frame;
+
+ read_8051_config(dd, LINK_QUALITY_INFO, GENERAL_CONFIG, &frame);
+ *pdrrc = (frame >> DOWN_REMOTE_REASON_SHIFT) & DOWN_REMOTE_REASON_MASK;
+}
+
+static int read_tx_settings(struct hfi1_devdata *dd,
+ u8 *enable_lane_tx,
+ u8 *tx_polarity_inversion,
+ u8 *rx_polarity_inversion,
+ u8 *max_rate)
+{
+ u32 frame;
+ int ret;
+
+ ret = read_8051_config(dd, TX_SETTINGS, GENERAL_CONFIG, &frame);
+ *enable_lane_tx = (frame >> ENABLE_LANE_TX_SHIFT)
+ & ENABLE_LANE_TX_MASK;
+ *tx_polarity_inversion = (frame >> TX_POLARITY_INVERSION_SHIFT)
+ & TX_POLARITY_INVERSION_MASK;
+ *rx_polarity_inversion = (frame >> RX_POLARITY_INVERSION_SHIFT)
+ & RX_POLARITY_INVERSION_MASK;
+ *max_rate = (frame >> MAX_RATE_SHIFT) & MAX_RATE_MASK;
+ return ret;
+}
+
+static int write_tx_settings(struct hfi1_devdata *dd,
+ u8 enable_lane_tx,
+ u8 tx_polarity_inversion,
+ u8 rx_polarity_inversion,
+ u8 max_rate)
+{
+ u32 frame;
+
+ /* no need to mask, all variable sizes match field widths */
+ frame = enable_lane_tx << ENABLE_LANE_TX_SHIFT
+ | tx_polarity_inversion << TX_POLARITY_INVERSION_SHIFT
+ | rx_polarity_inversion << RX_POLARITY_INVERSION_SHIFT
+ | max_rate << MAX_RATE_SHIFT;
+ return load_8051_config(dd, TX_SETTINGS, GENERAL_CONFIG, frame);
+}
+
+static void check_fabric_firmware_versions(struct hfi1_devdata *dd)
+{
+ u32 frame, version, prod_id;
+ int ret, lane;
+
+ /* 4 lanes */
+ for (lane = 0; lane < 4; lane++) {
+ ret = read_8051_config(dd, SPICO_FW_VERSION, lane, &frame);
+ if (ret) {
+ dd_dev_err(
+ dd,
+ "Unable to read lane %d firmware details\n",
+ lane);
+ continue;
+ }
+ version = (frame >> SPICO_ROM_VERSION_SHIFT)
+ & SPICO_ROM_VERSION_MASK;
+ prod_id = (frame >> SPICO_ROM_PROD_ID_SHIFT)
+ & SPICO_ROM_PROD_ID_MASK;
+ dd_dev_info(dd,
+ "Lane %d firmware: version 0x%04x, prod_id 0x%04x\n",
+ lane, version, prod_id);
+ }
+}
+
+/*
+ * Read an idle LCB message.
+ *
+ * Returns 0 on success, -EINVAL on error
+ */
+static int read_idle_message(struct hfi1_devdata *dd, u64 type, u64 *data_out)
+{
+ int ret;
+
+ ret = do_8051_command(dd, HCMD_READ_LCB_IDLE_MSG,
+ type, data_out);
+ if (ret != HCMD_SUCCESS) {
+ dd_dev_err(dd, "read idle message: type %d, err %d\n",
+ (u32)type, ret);
+ return -EINVAL;
+ }
+ dd_dev_info(dd, "%s: read idle message 0x%llx\n", __func__, *data_out);
+ /* return only the payload as we already know the type */
+ *data_out >>= IDLE_PAYLOAD_SHIFT;
+ return 0;
+}
+
+/*
+ * Read an idle SMA message. To be done in response to a notification from
+ * the 8051.
+ *
+ * Returns 0 on success, -EINVAL on error
+ */
+static int read_idle_sma(struct hfi1_devdata *dd, u64 *data)
+{
+ return read_idle_message(dd,
+ (u64)IDLE_SMA << IDLE_MSG_TYPE_SHIFT, data);
+}
+
+/*
+ * Send an idle LCB message.
+ *
+ * Returns 0 on success, -EINVAL on error
+ */
+static int send_idle_message(struct hfi1_devdata *dd, u64 data)
+{
+ int ret;
+
+ dd_dev_info(dd, "%s: sending idle message 0x%llx\n", __func__, data);
+ ret = do_8051_command(dd, HCMD_SEND_LCB_IDLE_MSG, data, NULL);
+ if (ret != HCMD_SUCCESS) {
+ dd_dev_err(dd, "send idle message: data 0x%llx, err %d\n",
+ data, ret);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * Send an idle SMA message.
+ *
+ * Returns 0 on success, -EINVAL on error
+ */
+int send_idle_sma(struct hfi1_devdata *dd, u64 message)
+{
+ u64 data;
+
+ data = ((message & IDLE_PAYLOAD_MASK) << IDLE_PAYLOAD_SHIFT)
+ | ((u64)IDLE_SMA << IDLE_MSG_TYPE_SHIFT);
+ return send_idle_message(dd, data);
+}
+
+/*
+ * Initialize the LCB then do a quick link up. This may or may not be
+ * in loopback.
+ *
+ * return 0 on success, -errno on error
+ */
+static int do_quick_linkup(struct hfi1_devdata *dd)
+{
+ u64 reg;
+ unsigned long timeout;
+ int ret;
+
+ lcb_shutdown(dd, 0);
+
+ if (loopback) {
+ /* LCB_CFG_LOOPBACK.VAL = 2 */
+ /* LCB_CFG_LANE_WIDTH.VAL = 0 */
+ write_csr(dd, DC_LCB_CFG_LOOPBACK,
+ IB_PACKET_TYPE << DC_LCB_CFG_LOOPBACK_VAL_SHIFT);
+ write_csr(dd, DC_LCB_CFG_LANE_WIDTH, 0);
+ }
+
+ /* start the LCBs */
+ /* LCB_CFG_TX_FIFOS_RESET.VAL = 0 */
+ write_csr(dd, DC_LCB_CFG_TX_FIFOS_RESET, 0);
+
+ /* simulator only loopback steps */
+ if (loopback && dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
+ /* LCB_CFG_RUN.EN = 1 */
+ write_csr(dd, DC_LCB_CFG_RUN,
+ 1ull << DC_LCB_CFG_RUN_EN_SHIFT);
+
+ /* watch LCB_STS_LINK_TRANSFER_ACTIVE */
+ timeout = jiffies + msecs_to_jiffies(10);
+ while (1) {
+ reg = read_csr(dd,
+ DC_LCB_STS_LINK_TRANSFER_ACTIVE);
+ if (reg)
+ break;
+ if (time_after(jiffies, timeout)) {
+ dd_dev_err(dd,
+ "timeout waiting for LINK_TRANSFER_ACTIVE\n");
+ return -ETIMEDOUT;
+ }
+ udelay(2);
+ }
+
+ write_csr(dd, DC_LCB_CFG_ALLOW_LINK_UP,
+ 1ull << DC_LCB_CFG_ALLOW_LINK_UP_VAL_SHIFT);
+ }
+
+ if (!loopback) {
+ /*
+ * When doing quick linkup and not in loopback, both
+ * sides must be done with LCB set-up before either
+ * starts the quick linkup. Put a delay here so that
+ * both sides can be started and have a chance to be
+ * done with LCB set up before resuming.
+ */
+ dd_dev_err(dd,
+ "Pausing for peer to be finished with LCB set up\n");
+ msleep(5000);
+ dd_dev_err(dd,
+ "Continuing with quick linkup\n");
+ }
+
+ write_csr(dd, DC_LCB_ERR_EN, 0); /* mask LCB errors */
+ set_8051_lcb_access(dd);
+
+ /*
+ * State "quick" LinkUp request sets the physical link state to
+ * LinkUp without a verify capability sequence.
+ * This state is in simulator v37 and later.
+ */
+ ret = set_physical_link_state(dd, PLS_QUICK_LINKUP);
+ if (ret != HCMD_SUCCESS) {
+ dd_dev_err(dd,
+ "%s: set physical link state to quick LinkUp failed with return %d\n",
+ __func__, ret);
+
+ set_host_lcb_access(dd);
+ write_csr(dd, DC_LCB_ERR_EN, ~0ull); /* watch LCB errors */
+
+ if (ret >= 0)
+ ret = -EINVAL;
+ return ret;
+ }
+
+ return 0; /* success */
+}
+
+/*
+ * Set the SerDes to internal loopback mode.
+ * Returns 0 on success, -errno on error.
+ */
+static int set_serdes_loopback_mode(struct hfi1_devdata *dd)
+{
+ int ret;
+
+ ret = set_physical_link_state(dd, PLS_INTERNAL_SERDES_LOOPBACK);
+ if (ret == HCMD_SUCCESS)
+ return 0;
+ dd_dev_err(dd,
+ "Set physical link state to SerDes Loopback failed with return %d\n",
+ ret);
+ if (ret >= 0)
+ ret = -EINVAL;
+ return ret;
+}
+
+/*
+ * Do all special steps to set up loopback.
+ */
+static int init_loopback(struct hfi1_devdata *dd)
+{
+ dd_dev_info(dd, "Entering loopback mode\n");
+
+ /* all loopbacks should disable self GUID check */
+ write_csr(dd, DC_DC8051_CFG_MODE,
+ (read_csr(dd, DC_DC8051_CFG_MODE) | DISABLE_SELF_GUID_CHECK));
+
+ /*
+ * The simulator has only one loopback option - LCB. Switch
+ * to that option, which includes quick link up.
+ *
+ * Accept all valid loopback values.
+ */
+ if ((dd->icode == ICODE_FUNCTIONAL_SIMULATOR)
+ && (loopback == LOOPBACK_SERDES
+ || loopback == LOOPBACK_LCB
+ || loopback == LOOPBACK_CABLE)) {
+ loopback = LOOPBACK_LCB;
+ quick_linkup = 1;
+ return 0;
+ }
+
+ /* handle serdes loopback */
+ if (loopback == LOOPBACK_SERDES) {
+ /* internal serdes loopack needs quick linkup on RTL */
+ if (dd->icode == ICODE_RTL_SILICON)
+ quick_linkup = 1;
+ return set_serdes_loopback_mode(dd);
+ }
+
+ /* LCB loopback - handled at poll time */
+ if (loopback == LOOPBACK_LCB) {
+ quick_linkup = 1; /* LCB is always quick linkup */
+
+ /* not supported in emulation due to emulation RTL changes */
+ if (dd->icode == ICODE_FPGA_EMULATION) {
+ dd_dev_err(dd,
+ "LCB loopback not supported in emulation\n");
+ return -EINVAL;
+ }
+ return 0;
+ }
+
+ /* external cable loopback requires no extra steps */
+ if (loopback == LOOPBACK_CABLE)
+ return 0;
+
+ dd_dev_err(dd, "Invalid loopback mode %d\n", loopback);
+ return -EINVAL;
+}
+
+/*
+ * Translate from the OPA_LINK_WIDTH handed to us by the FM to bits
+ * used in the Verify Capability link width attribute.
+ */
+static u16 opa_to_vc_link_widths(u16 opa_widths)
+{
+ int i;
+ u16 result = 0;
+
+ static const struct link_bits {
+ u16 from;
+ u16 to;
+ } opa_link_xlate[] = {
+ { OPA_LINK_WIDTH_1X, 1 << (1-1) },
+ { OPA_LINK_WIDTH_2X, 1 << (2-1) },
+ { OPA_LINK_WIDTH_3X, 1 << (3-1) },
+ { OPA_LINK_WIDTH_4X, 1 << (4-1) },
+ };
+
+ for (i = 0; i < ARRAY_SIZE(opa_link_xlate); i++) {
+ if (opa_widths & opa_link_xlate[i].from)
+ result |= opa_link_xlate[i].to;
+ }
+ return result;
+}
+
+/*
+ * Set link attributes before moving to polling.
+ */
+static int set_local_link_attributes(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ u8 enable_lane_tx;
+ u8 tx_polarity_inversion;
+ u8 rx_polarity_inversion;
+ int ret;
+
+ /* reset our fabric serdes to clear any lingering problems */
+ fabric_serdes_reset(dd);
+
+ /* set the local tx rate - need to read-modify-write */
+ ret = read_tx_settings(dd, &enable_lane_tx, &tx_polarity_inversion,
+ &rx_polarity_inversion, &ppd->local_tx_rate);
+ if (ret)
+ goto set_local_link_attributes_fail;
+
+ if (dd->dc8051_ver < dc8051_ver(0, 20)) {
+ /* set the tx rate to the fastest enabled */
+ if (ppd->link_speed_enabled & OPA_LINK_SPEED_25G)
+ ppd->local_tx_rate = 1;
+ else
+ ppd->local_tx_rate = 0;
+ } else {
+ /* set the tx rate to all enabled */
+ ppd->local_tx_rate = 0;
+ if (ppd->link_speed_enabled & OPA_LINK_SPEED_25G)
+ ppd->local_tx_rate |= 2;
+ if (ppd->link_speed_enabled & OPA_LINK_SPEED_12_5G)
+ ppd->local_tx_rate |= 1;
+ }
+ ret = write_tx_settings(dd, enable_lane_tx, tx_polarity_inversion,
+ rx_polarity_inversion, ppd->local_tx_rate);
+ if (ret != HCMD_SUCCESS)
+ goto set_local_link_attributes_fail;
+
+ /*
+ * DC supports continuous updates.
+ */
+ ret = write_vc_local_phy(dd, 0 /* no power management */,
+ 1 /* continuous updates */);
+ if (ret != HCMD_SUCCESS)
+ goto set_local_link_attributes_fail;
+
+ /* z=1 in the next call: AU of 0 is not supported by the hardware */
+ ret = write_vc_local_fabric(dd, dd->vau, 1, dd->vcu, dd->vl15_init,
+ ppd->port_crc_mode_enabled);
+ if (ret != HCMD_SUCCESS)
+ goto set_local_link_attributes_fail;
+
+ ret = write_vc_local_link_width(dd, 0, 0,
+ opa_to_vc_link_widths(ppd->link_width_enabled));
+ if (ret != HCMD_SUCCESS)
+ goto set_local_link_attributes_fail;
+
+ /* let peer know who we are */
+ ret = write_local_device_id(dd, dd->pcidev->device, dd->minrev);
+ if (ret == HCMD_SUCCESS)
+ return 0;
+
+set_local_link_attributes_fail:
+ dd_dev_err(dd,
+ "Failed to set local link attributes, return 0x%x\n",
+ ret);
+ return ret;
+}
+
+/*
+ * Call this to start the link. Schedule a retry if the cable is not
+ * present or if unable to start polling. Do not do anything if the
+ * link is disabled. Returns 0 if link is disabled or moved to polling
+ */
+int start_link(struct hfi1_pportdata *ppd)
+{
+ if (!ppd->link_enabled) {
+ dd_dev_info(ppd->dd,
+ "%s: stopping link start because link is disabled\n",
+ __func__);
+ return 0;
+ }
+ if (!ppd->driver_link_ready) {
+ dd_dev_info(ppd->dd,
+ "%s: stopping link start because driver is not ready\n",
+ __func__);
+ return 0;
+ }
+
+ if (qsfp_mod_present(ppd) || loopback == LOOPBACK_SERDES ||
+ loopback == LOOPBACK_LCB ||
+ ppd->dd->icode == ICODE_FUNCTIONAL_SIMULATOR)
+ return set_link_state(ppd, HLS_DN_POLL);
+
+ dd_dev_info(ppd->dd,
+ "%s: stopping link start because no cable is present\n",
+ __func__);
+ return -EAGAIN;
+}
+
+static void reset_qsfp(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ u64 mask, qsfp_mask;
+
+ mask = (u64)QSFP_HFI0_RESET_N;
+ qsfp_mask = read_csr(dd,
+ dd->hfi1_id ? ASIC_QSFP2_OE : ASIC_QSFP1_OE);
+ qsfp_mask |= mask;
+ write_csr(dd,
+ dd->hfi1_id ? ASIC_QSFP2_OE : ASIC_QSFP1_OE,
+ qsfp_mask);
+
+ qsfp_mask = read_csr(dd,
+ dd->hfi1_id ? ASIC_QSFP2_OUT : ASIC_QSFP1_OUT);
+ qsfp_mask &= ~mask;
+ write_csr(dd,
+ dd->hfi1_id ? ASIC_QSFP2_OUT : ASIC_QSFP1_OUT,
+ qsfp_mask);
+
+ udelay(10);
+
+ qsfp_mask |= mask;
+ write_csr(dd,
+ dd->hfi1_id ? ASIC_QSFP2_OUT : ASIC_QSFP1_OUT,
+ qsfp_mask);
+}
+
+static int handle_qsfp_error_conditions(struct hfi1_pportdata *ppd,
+ u8 *qsfp_interrupt_status)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+
+ if ((qsfp_interrupt_status[0] & QSFP_HIGH_TEMP_ALARM) ||
+ (qsfp_interrupt_status[0] & QSFP_HIGH_TEMP_WARNING))
+ dd_dev_info(dd,
+ "%s: QSFP cable on fire\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[0] & QSFP_LOW_TEMP_ALARM) ||
+ (qsfp_interrupt_status[0] & QSFP_LOW_TEMP_WARNING))
+ dd_dev_info(dd,
+ "%s: QSFP cable temperature too low\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[1] & QSFP_HIGH_VCC_ALARM) ||
+ (qsfp_interrupt_status[1] & QSFP_HIGH_VCC_WARNING))
+ dd_dev_info(dd,
+ "%s: QSFP supply voltage too high\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[1] & QSFP_LOW_VCC_ALARM) ||
+ (qsfp_interrupt_status[1] & QSFP_LOW_VCC_WARNING))
+ dd_dev_info(dd,
+ "%s: QSFP supply voltage too low\n",
+ __func__);
+
+ /* Byte 2 is vendor specific */
+
+ if ((qsfp_interrupt_status[3] & QSFP_HIGH_POWER_ALARM) ||
+ (qsfp_interrupt_status[3] & QSFP_HIGH_POWER_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable RX channel 1/2 power too high\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[3] & QSFP_LOW_POWER_ALARM) ||
+ (qsfp_interrupt_status[3] & QSFP_LOW_POWER_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable RX channel 1/2 power too low\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[4] & QSFP_HIGH_POWER_ALARM) ||
+ (qsfp_interrupt_status[4] & QSFP_HIGH_POWER_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable RX channel 3/4 power too high\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[4] & QSFP_LOW_POWER_ALARM) ||
+ (qsfp_interrupt_status[4] & QSFP_LOW_POWER_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable RX channel 3/4 power too low\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[5] & QSFP_HIGH_BIAS_ALARM) ||
+ (qsfp_interrupt_status[5] & QSFP_HIGH_BIAS_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable TX channel 1/2 bias too high\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[5] & QSFP_LOW_BIAS_ALARM) ||
+ (qsfp_interrupt_status[5] & QSFP_LOW_BIAS_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable TX channel 1/2 bias too low\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[6] & QSFP_HIGH_BIAS_ALARM) ||
+ (qsfp_interrupt_status[6] & QSFP_HIGH_BIAS_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable TX channel 3/4 bias too high\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[6] & QSFP_LOW_BIAS_ALARM) ||
+ (qsfp_interrupt_status[6] & QSFP_LOW_BIAS_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable TX channel 3/4 bias too low\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[7] & QSFP_HIGH_POWER_ALARM) ||
+ (qsfp_interrupt_status[7] & QSFP_HIGH_POWER_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable TX channel 1/2 power too high\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[7] & QSFP_LOW_POWER_ALARM) ||
+ (qsfp_interrupt_status[7] & QSFP_LOW_POWER_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable TX channel 1/2 power too low\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[8] & QSFP_HIGH_POWER_ALARM) ||
+ (qsfp_interrupt_status[8] & QSFP_HIGH_POWER_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable TX channel 3/4 power too high\n",
+ __func__);
+
+ if ((qsfp_interrupt_status[8] & QSFP_LOW_POWER_ALARM) ||
+ (qsfp_interrupt_status[8] & QSFP_LOW_POWER_WARNING))
+ dd_dev_info(dd,
+ "%s: Cable TX channel 3/4 power too low\n",
+ __func__);
+
+ /* Bytes 9-10 and 11-12 are reserved */
+ /* Bytes 13-15 are vendor specific */
+
+ return 0;
+}
+
+static int do_pre_lni_host_behaviors(struct hfi1_pportdata *ppd)
+{
+ refresh_qsfp_cache(ppd, &ppd->qsfp_info);
+
+ return 0;
+}
+
+static int do_qsfp_intr_fallback(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ u8 qsfp_interrupt_status = 0;
+
+ if (qsfp_read(ppd, dd->hfi1_id, 2, &qsfp_interrupt_status, 1)
+ != 1) {
+ dd_dev_info(dd,
+ "%s: Failed to read status of QSFP module\n",
+ __func__);
+ return -EIO;
+ }
+
+ /* We don't care about alarms & warnings with a non-functional INT_N */
+ if (!(qsfp_interrupt_status & QSFP_DATA_NOT_READY))
+ do_pre_lni_host_behaviors(ppd);
+
+ return 0;
+}
+
+/* This routine will only be scheduled if the QSFP module is present */
+static void qsfp_event(struct work_struct *work)
+{
+ struct qsfp_data *qd;
+ struct hfi1_pportdata *ppd;
+ struct hfi1_devdata *dd;
+
+ qd = container_of(work, struct qsfp_data, qsfp_work);
+ ppd = qd->ppd;
+ dd = ppd->dd;
+
+ /* Sanity check */
+ if (!qsfp_mod_present(ppd))
+ return;
+
+ /*
+ * Turn DC back on after cables has been
+ * re-inserted. Up until now, the DC has been in
+ * reset to save power.
+ */
+ dc_start(dd);
+
+ if (qd->cache_refresh_required) {
+ msleep(3000);
+ reset_qsfp(ppd);
+
+ /* Check for QSFP interrupt after t_init (SFF 8679)
+ * + extra
+ */
+ msleep(3000);
+ if (!qd->qsfp_interrupt_functional) {
+ if (do_qsfp_intr_fallback(ppd) < 0)
+ dd_dev_info(dd, "%s: QSFP fallback failed\n",
+ __func__);
+ ppd->driver_link_ready = 1;
+ start_link(ppd);
+ }
+ }
+
+ if (qd->check_interrupt_flags) {
+ u8 qsfp_interrupt_status[16] = {0,};
+
+ if (qsfp_read(ppd, dd->hfi1_id, 6,
+ &qsfp_interrupt_status[0], 16) != 16) {
+ dd_dev_info(dd,
+ "%s: Failed to read status of QSFP module\n",
+ __func__);
+ } else {
+ unsigned long flags;
+ u8 data_status;
+
+ spin_lock_irqsave(&ppd->qsfp_info.qsfp_lock, flags);
+ ppd->qsfp_info.check_interrupt_flags = 0;
+ spin_unlock_irqrestore(&ppd->qsfp_info.qsfp_lock,
+ flags);
+
+ if (qsfp_read(ppd, dd->hfi1_id, 2, &data_status, 1)
+ != 1) {
+ dd_dev_info(dd,
+ "%s: Failed to read status of QSFP module\n",
+ __func__);
+ }
+ if (!(data_status & QSFP_DATA_NOT_READY)) {
+ do_pre_lni_host_behaviors(ppd);
+ start_link(ppd);
+ } else
+ handle_qsfp_error_conditions(ppd,
+ qsfp_interrupt_status);
+ }
+ }
+}
+
+void init_qsfp(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ u64 qsfp_mask;
+
+ if (loopback == LOOPBACK_SERDES || loopback == LOOPBACK_LCB ||
+ ppd->dd->icode == ICODE_FUNCTIONAL_SIMULATOR ||
+ !HFI1_CAP_IS_KSET(QSFP_ENABLED)) {
+ ppd->driver_link_ready = 1;
+ return;
+ }
+
+ ppd->qsfp_info.ppd = ppd;
+ INIT_WORK(&ppd->qsfp_info.qsfp_work, qsfp_event);
+
+ qsfp_mask = (u64)(QSFP_HFI0_INT_N | QSFP_HFI0_MODPRST_N);
+ /* Clear current status to avoid spurious interrupts */
+ write_csr(dd,
+ dd->hfi1_id ?
+ ASIC_QSFP2_CLEAR :
+ ASIC_QSFP1_CLEAR,
+ qsfp_mask);
+
+ /* Handle active low nature of INT_N and MODPRST_N pins */
+ if (qsfp_mod_present(ppd))
+ qsfp_mask &= ~(u64)QSFP_HFI0_MODPRST_N;
+ write_csr(dd,
+ dd->hfi1_id ? ASIC_QSFP2_INVERT : ASIC_QSFP1_INVERT,
+ qsfp_mask);
+
+ /* Allow only INT_N and MODPRST_N to trigger QSFP interrupts */
+ qsfp_mask |= (u64)QSFP_HFI0_MODPRST_N;
+ write_csr(dd,
+ dd->hfi1_id ? ASIC_QSFP2_MASK : ASIC_QSFP1_MASK,
+ qsfp_mask);
+
+ if (qsfp_mod_present(ppd)) {
+ msleep(3000);
+ reset_qsfp(ppd);
+
+ /* Check for QSFP interrupt after t_init (SFF 8679)
+ * + extra
+ */
+ msleep(3000);
+ if (!ppd->qsfp_info.qsfp_interrupt_functional) {
+ if (do_qsfp_intr_fallback(ppd) < 0)
+ dd_dev_info(dd,
+ "%s: QSFP fallback failed\n",
+ __func__);
+ ppd->driver_link_ready = 1;
+ }
+ }
+}
+
+int bringup_serdes(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ u64 guid;
+ int ret;
+
+ if (HFI1_CAP_IS_KSET(EXTENDED_PSN))
+ add_rcvctrl(dd, RCV_CTRL_RCV_EXTENDED_PSN_ENABLE_SMASK);
+
+ guid = ppd->guid;
+ if (!guid) {
+ if (dd->base_guid)
+ guid = dd->base_guid + ppd->port - 1;
+ ppd->guid = guid;
+ }
+
+ /* the link defaults to enabled */
+ ppd->link_enabled = 1;
+ /* Set linkinit_reason on power up per OPA spec */
+ ppd->linkinit_reason = OPA_LINKINIT_REASON_LINKUP;
+
+ if (loopback) {
+ ret = init_loopback(dd);
+ if (ret < 0)
+ return ret;
+ }
+
+ return start_link(ppd);
+}
+
+void hfi1_quiet_serdes(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+
+ /*
+ * Shut down the link and keep it down. First turn off that the
+ * driver wants to allow the link to be up (driver_link_ready).
+ * Then make sure the link is not automatically restarted
+ * (link_enabled). Cancel any pending restart. And finally
+ * go offline.
+ */
+ ppd->driver_link_ready = 0;
+ ppd->link_enabled = 0;
+
+ set_link_down_reason(ppd, OPA_LINKDOWN_REASON_SMA_DISABLED, 0,
+ OPA_LINKDOWN_REASON_SMA_DISABLED);
+ set_link_state(ppd, HLS_DN_OFFLINE);
+
+ /* disable the port */
+ clear_rcvctrl(dd, RCV_CTRL_RCV_PORT_ENABLE_SMASK);
+}
+
+static inline int init_cpu_counters(struct hfi1_devdata *dd)
+{
+ struct hfi1_pportdata *ppd;
+ int i;
+
+ ppd = (struct hfi1_pportdata *)(dd + 1);
+ for (i = 0; i < dd->num_pports; i++, ppd++) {
+ ppd->ibport_data.rc_acks = NULL;
+ ppd->ibport_data.rc_qacks = NULL;
+ ppd->ibport_data.rc_acks = alloc_percpu(u64);
+ ppd->ibport_data.rc_qacks = alloc_percpu(u64);
+ ppd->ibport_data.rc_delayed_comp = alloc_percpu(u64);
+ if ((ppd->ibport_data.rc_acks == NULL) ||
+ (ppd->ibport_data.rc_delayed_comp == NULL) ||
+ (ppd->ibport_data.rc_qacks == NULL))
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static const char * const pt_names[] = {
+ "expected",
+ "eager",
+ "invalid"
+};
+
+static const char *pt_name(u32 type)
+{
+ return type >= ARRAY_SIZE(pt_names) ? "unknown" : pt_names[type];
+}
+
+/*
+ * index is the index into the receive array
+ */
+void hfi1_put_tid(struct hfi1_devdata *dd, u32 index,
+ u32 type, unsigned long pa, u16 order)
+{
+ u64 reg;
+ void __iomem *base = (dd->rcvarray_wc ? dd->rcvarray_wc :
+ (dd->kregbase + RCV_ARRAY));
+
+ if (!(dd->flags & HFI1_PRESENT))
+ goto done;
+
+ if (type == PT_INVALID) {
+ pa = 0;
+ } else if (type > PT_INVALID) {
+ dd_dev_err(dd,
+ "unexpected receive array type %u for index %u, not handled\n",
+ type, index);
+ goto done;
+ }
+
+ hfi1_cdbg(TID, "type %s, index 0x%x, pa 0x%lx, bsize 0x%lx",
+ pt_name(type), index, pa, (unsigned long)order);
+
+#define RT_ADDR_SHIFT 12 /* 4KB kernel address boundary */
+ reg = RCV_ARRAY_RT_WRITE_ENABLE_SMASK
+ | (u64)order << RCV_ARRAY_RT_BUF_SIZE_SHIFT
+ | ((pa >> RT_ADDR_SHIFT) & RCV_ARRAY_RT_ADDR_MASK)
+ << RCV_ARRAY_RT_ADDR_SHIFT;
+ writeq(reg, base + (index * 8));
+
+ if (type == PT_EAGER)
+ /*
+ * Eager entries are written one-by-one so we have to push them
+ * after we write the entry.
+ */
+ flush_wc();
+done:
+ return;
+}
+
+void hfi1_clear_tids(struct hfi1_ctxtdata *rcd)
+{
+ struct hfi1_devdata *dd = rcd->dd;
+ u32 i;
+
+ /* this could be optimized */
+ for (i = rcd->eager_base; i < rcd->eager_base +
+ rcd->egrbufs.alloced; i++)
+ hfi1_put_tid(dd, i, PT_INVALID, 0, 0);
+
+ for (i = rcd->expected_base;
+ i < rcd->expected_base + rcd->expected_count; i++)
+ hfi1_put_tid(dd, i, PT_INVALID, 0, 0);
+}
+
+int hfi1_get_base_kinfo(struct hfi1_ctxtdata *rcd,
+ struct hfi1_ctxt_info *kinfo)
+{
+ kinfo->runtime_flags = (HFI1_MISC_GET() << HFI1_CAP_USER_SHIFT) |
+ HFI1_CAP_UGET(MASK) | HFI1_CAP_KGET(K2U);
+ return 0;
+}
+
+struct hfi1_message_header *hfi1_get_msgheader(
+ struct hfi1_devdata *dd, __le32 *rhf_addr)
+{
+ u32 offset = rhf_hdrq_offset(rhf_to_cpu(rhf_addr));
+
+ return (struct hfi1_message_header *)
+ (rhf_addr - dd->rhf_offset + offset);
+}
+
+static const char * const ib_cfg_name_strings[] = {
+ "HFI1_IB_CFG_LIDLMC",
+ "HFI1_IB_CFG_LWID_DG_ENB",
+ "HFI1_IB_CFG_LWID_ENB",
+ "HFI1_IB_CFG_LWID",
+ "HFI1_IB_CFG_SPD_ENB",
+ "HFI1_IB_CFG_SPD",
+ "HFI1_IB_CFG_RXPOL_ENB",
+ "HFI1_IB_CFG_LREV_ENB",
+ "HFI1_IB_CFG_LINKLATENCY",
+ "HFI1_IB_CFG_HRTBT",
+ "HFI1_IB_CFG_OP_VLS",
+ "HFI1_IB_CFG_VL_HIGH_CAP",
+ "HFI1_IB_CFG_VL_LOW_CAP",
+ "HFI1_IB_CFG_OVERRUN_THRESH",
+ "HFI1_IB_CFG_PHYERR_THRESH",
+ "HFI1_IB_CFG_LINKDEFAULT",
+ "HFI1_IB_CFG_PKEYS",
+ "HFI1_IB_CFG_MTU",
+ "HFI1_IB_CFG_LSTATE",
+ "HFI1_IB_CFG_VL_HIGH_LIMIT",
+ "HFI1_IB_CFG_PMA_TICKS",
+ "HFI1_IB_CFG_PORT"
+};
+
+static const char *ib_cfg_name(int which)
+{
+ if (which < 0 || which >= ARRAY_SIZE(ib_cfg_name_strings))
+ return "invalid";
+ return ib_cfg_name_strings[which];
+}
+
+int hfi1_get_ib_cfg(struct hfi1_pportdata *ppd, int which)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ int val = 0;
+
+ switch (which) {
+ case HFI1_IB_CFG_LWID_ENB: /* allowed Link-width */
+ val = ppd->link_width_enabled;
+ break;
+ case HFI1_IB_CFG_LWID: /* currently active Link-width */
+ val = ppd->link_width_active;
+ break;
+ case HFI1_IB_CFG_SPD_ENB: /* allowed Link speeds */
+ val = ppd->link_speed_enabled;
+ break;
+ case HFI1_IB_CFG_SPD: /* current Link speed */
+ val = ppd->link_speed_active;
+ break;
+
+ case HFI1_IB_CFG_RXPOL_ENB: /* Auto-RX-polarity enable */
+ case HFI1_IB_CFG_LREV_ENB: /* Auto-Lane-reversal enable */
+ case HFI1_IB_CFG_LINKLATENCY:
+ goto unimplemented;
+
+ case HFI1_IB_CFG_OP_VLS:
+ val = ppd->vls_operational;
+ break;
+ case HFI1_IB_CFG_VL_HIGH_CAP: /* VL arb high priority table size */
+ val = VL_ARB_HIGH_PRIO_TABLE_SIZE;
+ break;
+ case HFI1_IB_CFG_VL_LOW_CAP: /* VL arb low priority table size */
+ val = VL_ARB_LOW_PRIO_TABLE_SIZE;
+ break;
+ case HFI1_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
+ val = ppd->overrun_threshold;
+ break;
+ case HFI1_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
+ val = ppd->phy_error_threshold;
+ break;
+ case HFI1_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
+ val = dd->link_default;
+ break;
+
+ case HFI1_IB_CFG_HRTBT: /* Heartbeat off/enable/auto */
+ case HFI1_IB_CFG_PMA_TICKS:
+ default:
+unimplemented:
+ if (HFI1_CAP_IS_KSET(PRINT_UNIMPL))
+ dd_dev_info(
+ dd,
+ "%s: which %s: not implemented\n",
+ __func__,
+ ib_cfg_name(which));
+ break;
+ }
+
+ return val;
+}
+
+/*
+ * The largest MAD packet size.
+ */
+#define MAX_MAD_PACKET 2048
+
+/*
+ * Return the maximum header bytes that can go on the _wire_
+ * for this device. This count includes the ICRC which is
+ * not part of the packet held in memory but it is appended
+ * by the HW.
+ * This is dependent on the device's receive header entry size.
+ * HFI allows this to be set per-receive context, but the
+ * driver presently enforces a global value.
+ */
+u32 lrh_max_header_bytes(struct hfi1_devdata *dd)
+{
+ /*
+ * The maximum non-payload (MTU) bytes in LRH.PktLen are
+ * the Receive Header Entry Size minus the PBC (or RHF) size
+ * plus one DW for the ICRC appended by HW.
+ *
+ * dd->rcd[0].rcvhdrqentsize is in DW.
+ * We use rcd[0] as all context will have the same value. Also,
+ * the first kernel context would have been allocated by now so
+ * we are guaranteed a valid value.
+ */
+ return (dd->rcd[0]->rcvhdrqentsize - 2/*PBC/RHF*/ + 1/*ICRC*/) << 2;
+}
+
+/*
+ * Set Send Length
+ * @ppd - per port data
+ *
+ * Set the MTU by limiting how many DWs may be sent. The SendLenCheck*
+ * registers compare against LRH.PktLen, so use the max bytes included
+ * in the LRH.
+ *
+ * This routine changes all VL values except VL15, which it maintains at
+ * the same value.
+ */
+static void set_send_length(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ u32 max_hb = lrh_max_header_bytes(dd), maxvlmtu = 0, dcmtu;
+ u64 len1 = 0, len2 = (((dd->vld[15].mtu + max_hb) >> 2)
+ & SEND_LEN_CHECK1_LEN_VL15_MASK) <<
+ SEND_LEN_CHECK1_LEN_VL15_SHIFT;
+ int i;
+
+ for (i = 0; i < ppd->vls_supported; i++) {
+ if (dd->vld[i].mtu > maxvlmtu)
+ maxvlmtu = dd->vld[i].mtu;
+ if (i <= 3)
+ len1 |= (((dd->vld[i].mtu + max_hb) >> 2)
+ & SEND_LEN_CHECK0_LEN_VL0_MASK) <<
+ ((i % 4) * SEND_LEN_CHECK0_LEN_VL1_SHIFT);
+ else
+ len2 |= (((dd->vld[i].mtu + max_hb) >> 2)
+ & SEND_LEN_CHECK1_LEN_VL4_MASK) <<
+ ((i % 4) * SEND_LEN_CHECK1_LEN_VL5_SHIFT);
+ }
+ write_csr(dd, SEND_LEN_CHECK0, len1);
+ write_csr(dd, SEND_LEN_CHECK1, len2);
+ /* adjust kernel credit return thresholds based on new MTUs */
+ /* all kernel receive contexts have the same hdrqentsize */
+ for (i = 0; i < ppd->vls_supported; i++) {
+ sc_set_cr_threshold(dd->vld[i].sc,
+ sc_mtu_to_threshold(dd->vld[i].sc, dd->vld[i].mtu,
+ dd->rcd[0]->rcvhdrqentsize));
+ }
+ sc_set_cr_threshold(dd->vld[15].sc,
+ sc_mtu_to_threshold(dd->vld[15].sc, dd->vld[15].mtu,
+ dd->rcd[0]->rcvhdrqentsize));
+
+ /* Adjust maximum MTU for the port in DC */
+ dcmtu = maxvlmtu == 10240 ? DCC_CFG_PORT_MTU_CAP_10240 :
+ (ilog2(maxvlmtu >> 8) + 1);
+ len1 = read_csr(ppd->dd, DCC_CFG_PORT_CONFIG);
+ len1 &= ~DCC_CFG_PORT_CONFIG_MTU_CAP_SMASK;
+ len1 |= ((u64)dcmtu & DCC_CFG_PORT_CONFIG_MTU_CAP_MASK) <<
+ DCC_CFG_PORT_CONFIG_MTU_CAP_SHIFT;
+ write_csr(ppd->dd, DCC_CFG_PORT_CONFIG, len1);
+}
+
+static void set_lidlmc(struct hfi1_pportdata *ppd)
+{
+ int i;
+ u64 sreg = 0;
+ struct hfi1_devdata *dd = ppd->dd;
+ u32 mask = ~((1U << ppd->lmc) - 1);
+ u64 c1 = read_csr(ppd->dd, DCC_CFG_PORT_CONFIG1);
+
+ if (dd->hfi1_snoop.mode_flag)
+ dd_dev_info(dd, "Set lid/lmc while snooping");
+
+ c1 &= ~(DCC_CFG_PORT_CONFIG1_TARGET_DLID_SMASK
+ | DCC_CFG_PORT_CONFIG1_DLID_MASK_SMASK);
+ c1 |= ((ppd->lid & DCC_CFG_PORT_CONFIG1_TARGET_DLID_MASK)
+ << DCC_CFG_PORT_CONFIG1_TARGET_DLID_SHIFT)|
+ ((mask & DCC_CFG_PORT_CONFIG1_DLID_MASK_MASK)
+ << DCC_CFG_PORT_CONFIG1_DLID_MASK_SHIFT);
+ write_csr(ppd->dd, DCC_CFG_PORT_CONFIG1, c1);
+
+ /*
+ * Iterate over all the send contexts and set their SLID check
+ */
+ sreg = ((mask & SEND_CTXT_CHECK_SLID_MASK_MASK) <<
+ SEND_CTXT_CHECK_SLID_MASK_SHIFT) |
+ (((ppd->lid & mask) & SEND_CTXT_CHECK_SLID_VALUE_MASK) <<
+ SEND_CTXT_CHECK_SLID_VALUE_SHIFT);
+
+ for (i = 0; i < dd->chip_send_contexts; i++) {
+ hfi1_cdbg(LINKVERB, "SendContext[%d].SLID_CHECK = 0x%x",
+ i, (u32)sreg);
+ write_kctxt_csr(dd, i, SEND_CTXT_CHECK_SLID, sreg);
+ }
+
+ /* Now we have to do the same thing for the sdma engines */
+ sdma_update_lmc(dd, mask, ppd->lid);
+}
+
+static int wait_phy_linkstate(struct hfi1_devdata *dd, u32 state, u32 msecs)
+{
+ unsigned long timeout;
+ u32 curr_state;
+
+ timeout = jiffies + msecs_to_jiffies(msecs);
+ while (1) {
+ curr_state = read_physical_state(dd);
+ if (curr_state == state)
+ break;
+ if (time_after(jiffies, timeout)) {
+ dd_dev_err(dd,
+ "timeout waiting for phy link state 0x%x, current state is 0x%x\n",
+ state, curr_state);
+ return -ETIMEDOUT;
+ }
+ usleep_range(1950, 2050); /* sleep 2ms-ish */
+ }
+
+ return 0;
+}
+
+/*
+ * Helper for set_link_state(). Do not call except from that routine.
+ * Expects ppd->hls_mutex to be held.
+ *
+ * @rem_reason value to be sent to the neighbor
+ *
+ * LinkDownReasons only set if transition succeeds.
+ */
+static int goto_offline(struct hfi1_pportdata *ppd, u8 rem_reason)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ u32 pstate, previous_state;
+ u32 last_local_state;
+ u32 last_remote_state;
+ int ret;
+ int do_transition;
+ int do_wait;
+
+ previous_state = ppd->host_link_state;
+ ppd->host_link_state = HLS_GOING_OFFLINE;
+ pstate = read_physical_state(dd);
+ if (pstate == PLS_OFFLINE) {
+ do_transition = 0; /* in right state */
+ do_wait = 0; /* ...no need to wait */
+ } else if ((pstate & 0xff) == PLS_OFFLINE) {
+ do_transition = 0; /* in an offline transient state */
+ do_wait = 1; /* ...wait for it to settle */
+ } else {
+ do_transition = 1; /* need to move to offline */
+ do_wait = 1; /* ...will need to wait */
+ }
+
+ if (do_transition) {
+ ret = set_physical_link_state(dd,
+ PLS_OFFLINE | (rem_reason << 8));
+
+ if (ret != HCMD_SUCCESS) {
+ dd_dev_err(dd,
+ "Failed to transition to Offline link state, return %d\n",
+ ret);
+ return -EINVAL;
+ }
+ if (ppd->offline_disabled_reason == OPA_LINKDOWN_REASON_NONE)
+ ppd->offline_disabled_reason =
+ OPA_LINKDOWN_REASON_TRANSIENT;
+ }
+
+ if (do_wait) {
+ /* it can take a while for the link to go down */
+ ret = wait_phy_linkstate(dd, PLS_OFFLINE, 5000);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* make sure the logical state is also down */
+ wait_logical_linkstate(ppd, IB_PORT_DOWN, 1000);
+
+ /*
+ * Now in charge of LCB - must be after the physical state is
+ * offline.quiet and before host_link_state is changed.
+ */
+ set_host_lcb_access(dd);
+ write_csr(dd, DC_LCB_ERR_EN, ~0ull); /* watch LCB errors */
+ ppd->host_link_state = HLS_LINK_COOLDOWN; /* LCB access allowed */
+
+ /*
+ * The LNI has a mandatory wait time after the physical state
+ * moves to Offline.Quiet. The wait time may be different
+ * depending on how the link went down. The 8051 firmware
+ * will observe the needed wait time and only move to ready
+ * when that is completed. The largest of the quiet timeouts
+ * is 2.5s, so wait that long and then a bit more.
+ */
+ ret = wait_fm_ready(dd, 3000);
+ if (ret) {
+ dd_dev_err(dd,
+ "After going offline, timed out waiting for the 8051 to become ready to accept host requests\n");
+ /* state is really offline, so make it so */
+ ppd->host_link_state = HLS_DN_OFFLINE;
+ return ret;
+ }
+
+ /*
+ * The state is now offline and the 8051 is ready to accept host
+ * requests.
+ * - change our state
+ * - notify others if we were previously in a linkup state
+ */
+ ppd->host_link_state = HLS_DN_OFFLINE;
+ if (previous_state & HLS_UP) {
+ /* went down while link was up */
+ handle_linkup_change(dd, 0);
+ } else if (previous_state
+ & (HLS_DN_POLL | HLS_VERIFY_CAP | HLS_GOING_UP)) {
+ /* went down while attempting link up */
+ /* byte 1 of last_*_state is the failure reason */
+ read_last_local_state(dd, &last_local_state);
+ read_last_remote_state(dd, &last_remote_state);
+ dd_dev_err(dd,
+ "LNI failure last states: local 0x%08x, remote 0x%08x\n",
+ last_local_state, last_remote_state);
+ }
+
+ /* the active link width (downgrade) is 0 on link down */
+ ppd->link_width_active = 0;
+ ppd->link_width_downgrade_tx_active = 0;
+ ppd->link_width_downgrade_rx_active = 0;
+ ppd->current_egress_rate = 0;
+ return 0;
+}
+
+/* return the link state name */
+static const char *link_state_name(u32 state)
+{
+ const char *name;
+ int n = ilog2(state);
+ static const char * const names[] = {
+ [__HLS_UP_INIT_BP] = "INIT",
+ [__HLS_UP_ARMED_BP] = "ARMED",
+ [__HLS_UP_ACTIVE_BP] = "ACTIVE",
+ [__HLS_DN_DOWNDEF_BP] = "DOWNDEF",
+ [__HLS_DN_POLL_BP] = "POLL",
+ [__HLS_DN_DISABLE_BP] = "DISABLE",
+ [__HLS_DN_OFFLINE_BP] = "OFFLINE",
+ [__HLS_VERIFY_CAP_BP] = "VERIFY_CAP",
+ [__HLS_GOING_UP_BP] = "GOING_UP",
+ [__HLS_GOING_OFFLINE_BP] = "GOING_OFFLINE",
+ [__HLS_LINK_COOLDOWN_BP] = "LINK_COOLDOWN"
+ };
+
+ name = n < ARRAY_SIZE(names) ? names[n] : NULL;
+ return name ? name : "unknown";
+}
+
+/* return the link state reason name */
+static const char *link_state_reason_name(struct hfi1_pportdata *ppd, u32 state)
+{
+ if (state == HLS_UP_INIT) {
+ switch (ppd->linkinit_reason) {
+ case OPA_LINKINIT_REASON_LINKUP:
+ return "(LINKUP)";
+ case OPA_LINKINIT_REASON_FLAPPING:
+ return "(FLAPPING)";
+ case OPA_LINKINIT_OUTSIDE_POLICY:
+ return "(OUTSIDE_POLICY)";
+ case OPA_LINKINIT_QUARANTINED:
+ return "(QUARANTINED)";
+ case OPA_LINKINIT_INSUFIC_CAPABILITY:
+ return "(INSUFIC_CAPABILITY)";
+ default:
+ break;
+ }
+ }
+ return "";
+}
+
+/*
+ * driver_physical_state - convert the driver's notion of a port's
+ * state (an HLS_*) into a physical state (a {IB,OPA}_PORTPHYSSTATE_*).
+ * Return -1 (converted to a u32) to indicate error.
+ */
+u32 driver_physical_state(struct hfi1_pportdata *ppd)
+{
+ switch (ppd->host_link_state) {
+ case HLS_UP_INIT:
+ case HLS_UP_ARMED:
+ case HLS_UP_ACTIVE:
+ return IB_PORTPHYSSTATE_LINKUP;
+ case HLS_DN_POLL:
+ return IB_PORTPHYSSTATE_POLLING;
+ case HLS_DN_DISABLE:
+ return IB_PORTPHYSSTATE_DISABLED;
+ case HLS_DN_OFFLINE:
+ return OPA_PORTPHYSSTATE_OFFLINE;
+ case HLS_VERIFY_CAP:
+ return IB_PORTPHYSSTATE_POLLING;
+ case HLS_GOING_UP:
+ return IB_PORTPHYSSTATE_POLLING;
+ case HLS_GOING_OFFLINE:
+ return OPA_PORTPHYSSTATE_OFFLINE;
+ case HLS_LINK_COOLDOWN:
+ return OPA_PORTPHYSSTATE_OFFLINE;
+ case HLS_DN_DOWNDEF:
+ default:
+ dd_dev_err(ppd->dd, "invalid host_link_state 0x%x\n",
+ ppd->host_link_state);
+ return -1;
+ }
+}
+
+/*
+ * driver_logical_state - convert the driver's notion of a port's
+ * state (an HLS_*) into a logical state (a IB_PORT_*). Return -1
+ * (converted to a u32) to indicate error.
+ */
+u32 driver_logical_state(struct hfi1_pportdata *ppd)
+{
+ if (ppd->host_link_state && !(ppd->host_link_state & HLS_UP))
+ return IB_PORT_DOWN;
+
+ switch (ppd->host_link_state & HLS_UP) {
+ case HLS_UP_INIT:
+ return IB_PORT_INIT;
+ case HLS_UP_ARMED:
+ return IB_PORT_ARMED;
+ case HLS_UP_ACTIVE:
+ return IB_PORT_ACTIVE;
+ default:
+ dd_dev_err(ppd->dd, "invalid host_link_state 0x%x\n",
+ ppd->host_link_state);
+ return -1;
+ }
+}
+
+void set_link_down_reason(struct hfi1_pportdata *ppd, u8 lcl_reason,
+ u8 neigh_reason, u8 rem_reason)
+{
+ if (ppd->local_link_down_reason.latest == 0 &&
+ ppd->neigh_link_down_reason.latest == 0) {
+ ppd->local_link_down_reason.latest = lcl_reason;
+ ppd->neigh_link_down_reason.latest = neigh_reason;
+ ppd->remote_link_down_reason = rem_reason;
+ }
+}
+
+/*
+ * Change the physical and/or logical link state.
+ *
+ * Do not call this routine while inside an interrupt. It contains
+ * calls to routines that can take multiple seconds to finish.
+ *
+ * Returns 0 on success, -errno on failure.
+ */
+int set_link_state(struct hfi1_pportdata *ppd, u32 state)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ struct ib_event event = {.device = NULL};
+ int ret1, ret = 0;
+ int was_up, is_down;
+ int orig_new_state, poll_bounce;
+
+ mutex_lock(&ppd->hls_lock);
+
+ orig_new_state = state;
+ if (state == HLS_DN_DOWNDEF)
+ state = dd->link_default;
+
+ /* interpret poll -> poll as a link bounce */
+ poll_bounce = ppd->host_link_state == HLS_DN_POLL
+ && state == HLS_DN_POLL;
+
+ dd_dev_info(dd, "%s: current %s, new %s %s%s\n", __func__,
+ link_state_name(ppd->host_link_state),
+ link_state_name(orig_new_state),
+ poll_bounce ? "(bounce) " : "",
+ link_state_reason_name(ppd, state));
+
+ was_up = !!(ppd->host_link_state & HLS_UP);
+
+ /*
+ * If we're going to a (HLS_*) link state that implies the logical
+ * link state is neither of (IB_PORT_ARMED, IB_PORT_ACTIVE), then
+ * reset is_sm_config_started to 0.
+ */
+ if (!(state & (HLS_UP_ARMED | HLS_UP_ACTIVE)))
+ ppd->is_sm_config_started = 0;
+
+ /*
+ * Do nothing if the states match. Let a poll to poll link bounce
+ * go through.
+ */
+ if (ppd->host_link_state == state && !poll_bounce)
+ goto done;
+
+ switch (state) {
+ case HLS_UP_INIT:
+ if (ppd->host_link_state == HLS_DN_POLL && (quick_linkup
+ || dd->icode == ICODE_FUNCTIONAL_SIMULATOR)) {
+ /*
+ * Quick link up jumps from polling to here.
+ *
+ * Whether in normal or loopback mode, the
+ * simulator jumps from polling to link up.
+ * Accept that here.
+ */
+ /* OK */;
+ } else if (ppd->host_link_state != HLS_GOING_UP) {
+ goto unexpected;
+ }
+
+ ppd->host_link_state = HLS_UP_INIT;
+ ret = wait_logical_linkstate(ppd, IB_PORT_INIT, 1000);
+ if (ret) {
+ /* logical state didn't change, stay at going_up */
+ ppd->host_link_state = HLS_GOING_UP;
+ dd_dev_err(dd,
+ "%s: logical state did not change to INIT\n",
+ __func__);
+ } else {
+ /* clear old transient LINKINIT_REASON code */
+ if (ppd->linkinit_reason >= OPA_LINKINIT_REASON_CLEAR)
+ ppd->linkinit_reason =
+ OPA_LINKINIT_REASON_LINKUP;
+
+ /* enable the port */
+ add_rcvctrl(dd, RCV_CTRL_RCV_PORT_ENABLE_SMASK);
+
+ handle_linkup_change(dd, 1);
+ }
+ break;
+ case HLS_UP_ARMED:
+ if (ppd->host_link_state != HLS_UP_INIT)
+ goto unexpected;
+
+ ppd->host_link_state = HLS_UP_ARMED;
+ set_logical_state(dd, LSTATE_ARMED);
+ ret = wait_logical_linkstate(ppd, IB_PORT_ARMED, 1000);
+ if (ret) {
+ /* logical state didn't change, stay at init */
+ ppd->host_link_state = HLS_UP_INIT;
+ dd_dev_err(dd,
+ "%s: logical state did not change to ARMED\n",
+ __func__);
+ }
+ /*
+ * The simulator does not currently implement SMA messages,
+ * so neighbor_normal is not set. Set it here when we first
+ * move to Armed.
+ */
+ if (dd->icode == ICODE_FUNCTIONAL_SIMULATOR)
+ ppd->neighbor_normal = 1;
+ break;
+ case HLS_UP_ACTIVE:
+ if (ppd->host_link_state != HLS_UP_ARMED)
+ goto unexpected;
+
+ ppd->host_link_state = HLS_UP_ACTIVE;
+ set_logical_state(dd, LSTATE_ACTIVE);
+ ret = wait_logical_linkstate(ppd, IB_PORT_ACTIVE, 1000);
+ if (ret) {
+ /* logical state didn't change, stay at armed */
+ ppd->host_link_state = HLS_UP_ARMED;
+ dd_dev_err(dd,
+ "%s: logical state did not change to ACTIVE\n",
+ __func__);
+ } else {
+
+ /* tell all engines to go running */
+ sdma_all_running(dd);
+
+ /* Signal the IB layer that the port has went active */
+ event.device = &dd->verbs_dev.ibdev;
+ event.element.port_num = ppd->port;
+ event.event = IB_EVENT_PORT_ACTIVE;
+ }
+ break;
+ case HLS_DN_POLL:
+ if ((ppd->host_link_state == HLS_DN_DISABLE ||
+ ppd->host_link_state == HLS_DN_OFFLINE) &&
+ dd->dc_shutdown)
+ dc_start(dd);
+ /* Hand LED control to the DC */
+ write_csr(dd, DCC_CFG_LED_CNTRL, 0);
+
+ if (ppd->host_link_state != HLS_DN_OFFLINE) {
+ u8 tmp = ppd->link_enabled;
+
+ ret = goto_offline(ppd, ppd->remote_link_down_reason);
+ if (ret) {
+ ppd->link_enabled = tmp;
+ break;
+ }
+ ppd->remote_link_down_reason = 0;
+
+ if (ppd->driver_link_ready)
+ ppd->link_enabled = 1;
+ }
+
+ ret = set_local_link_attributes(ppd);
+ if (ret)
+ break;
+
+ ppd->port_error_action = 0;
+ ppd->host_link_state = HLS_DN_POLL;
+
+ if (quick_linkup) {
+ /* quick linkup does not go into polling */
+ ret = do_quick_linkup(dd);
+ } else {
+ ret1 = set_physical_link_state(dd, PLS_POLLING);
+ if (ret1 != HCMD_SUCCESS) {
+ dd_dev_err(dd,
+ "Failed to transition to Polling link state, return 0x%x\n",
+ ret1);
+ ret = -EINVAL;
+ }
+ }
+ ppd->offline_disabled_reason = OPA_LINKDOWN_REASON_NONE;
+ /*
+ * If an error occurred above, go back to offline. The
+ * caller may reschedule another attempt.
+ */
+ if (ret)
+ goto_offline(ppd, 0);
+ break;
+ case HLS_DN_DISABLE:
+ /* link is disabled */
+ ppd->link_enabled = 0;
+
+ /* allow any state to transition to disabled */
+
+ /* must transition to offline first */
+ if (ppd->host_link_state != HLS_DN_OFFLINE) {
+ ret = goto_offline(ppd, ppd->remote_link_down_reason);
+ if (ret)
+ break;
+ ppd->remote_link_down_reason = 0;
+ }
+
+ ret1 = set_physical_link_state(dd, PLS_DISABLED);
+ if (ret1 != HCMD_SUCCESS) {
+ dd_dev_err(dd,
+ "Failed to transition to Disabled link state, return 0x%x\n",
+ ret1);
+ ret = -EINVAL;
+ break;
+ }
+ ppd->host_link_state = HLS_DN_DISABLE;
+ dc_shutdown(dd);
+ break;
+ case HLS_DN_OFFLINE:
+ if (ppd->host_link_state == HLS_DN_DISABLE)
+ dc_start(dd);
+
+ /* allow any state to transition to offline */
+ ret = goto_offline(ppd, ppd->remote_link_down_reason);
+ if (!ret)
+ ppd->remote_link_down_reason = 0;
+ break;
+ case HLS_VERIFY_CAP:
+ if (ppd->host_link_state != HLS_DN_POLL)
+ goto unexpected;
+ ppd->host_link_state = HLS_VERIFY_CAP;
+ break;
+ case HLS_GOING_UP:
+ if (ppd->host_link_state != HLS_VERIFY_CAP)
+ goto unexpected;
+
+ ret1 = set_physical_link_state(dd, PLS_LINKUP);
+ if (ret1 != HCMD_SUCCESS) {
+ dd_dev_err(dd,
+ "Failed to transition to link up state, return 0x%x\n",
+ ret1);
+ ret = -EINVAL;
+ break;
+ }
+ ppd->host_link_state = HLS_GOING_UP;
+ break;
+
+ case HLS_GOING_OFFLINE: /* transient within goto_offline() */
+ case HLS_LINK_COOLDOWN: /* transient within goto_offline() */
+ default:
+ dd_dev_info(dd, "%s: state 0x%x: not supported\n",
+ __func__, state);
+ ret = -EINVAL;
+ break;
+ }
+
+ is_down = !!(ppd->host_link_state & (HLS_DN_POLL |
+ HLS_DN_DISABLE | HLS_DN_OFFLINE));
+
+ if (was_up && is_down && ppd->local_link_down_reason.sma == 0 &&
+ ppd->neigh_link_down_reason.sma == 0) {
+ ppd->local_link_down_reason.sma =
+ ppd->local_link_down_reason.latest;
+ ppd->neigh_link_down_reason.sma =
+ ppd->neigh_link_down_reason.latest;
+ }
+
+ goto done;
+
+unexpected:
+ dd_dev_err(dd, "%s: unexpected state transition from %s to %s\n",
+ __func__, link_state_name(ppd->host_link_state),
+ link_state_name(state));
+ ret = -EINVAL;
+
+done:
+ mutex_unlock(&ppd->hls_lock);
+
+ if (event.device)
+ ib_dispatch_event(&event);
+
+ return ret;
+}
+
+int hfi1_set_ib_cfg(struct hfi1_pportdata *ppd, int which, u32 val)
+{
+ u64 reg;
+ int ret = 0;
+
+ switch (which) {
+ case HFI1_IB_CFG_LIDLMC:
+ set_lidlmc(ppd);
+ break;
+ case HFI1_IB_CFG_VL_HIGH_LIMIT:
+ /*
+ * The VL Arbitrator high limit is sent in units of 4k
+ * bytes, while HFI stores it in units of 64 bytes.
+ */
+ val *= 4096/64;
+ reg = ((u64)val & SEND_HIGH_PRIORITY_LIMIT_LIMIT_MASK)
+ << SEND_HIGH_PRIORITY_LIMIT_LIMIT_SHIFT;
+ write_csr(ppd->dd, SEND_HIGH_PRIORITY_LIMIT, reg);
+ break;
+ case HFI1_IB_CFG_LINKDEFAULT: /* IB link default (sleep/poll) */
+ /* HFI only supports POLL as the default link down state */
+ if (val != HLS_DN_POLL)
+ ret = -EINVAL;
+ break;
+ case HFI1_IB_CFG_OP_VLS:
+ if (ppd->vls_operational != val) {
+ ppd->vls_operational = val;
+ if (!ppd->port)
+ ret = -EINVAL;
+ else
+ ret = sdma_map_init(
+ ppd->dd,
+ ppd->port - 1,
+ val,
+ NULL);
+ }
+ break;
+ /*
+ * For link width, link width downgrade, and speed enable, always AND
+ * the setting with what is actually supported. This has two benefits.
+ * First, enabled can't have unsupported values, no matter what the
+ * SM or FM might want. Second, the ALL_SUPPORTED wildcards that mean
+ * "fill in with your supported value" have all the bits in the
+ * field set, so simply ANDing with supported has the desired result.
+ */
+ case HFI1_IB_CFG_LWID_ENB: /* set allowed Link-width */
+ ppd->link_width_enabled = val & ppd->link_width_supported;
+ break;
+ case HFI1_IB_CFG_LWID_DG_ENB: /* set allowed link width downgrade */
+ ppd->link_width_downgrade_enabled =
+ val & ppd->link_width_downgrade_supported;
+ break;
+ case HFI1_IB_CFG_SPD_ENB: /* allowed Link speeds */
+ ppd->link_speed_enabled = val & ppd->link_speed_supported;
+ break;
+ case HFI1_IB_CFG_OVERRUN_THRESH: /* IB overrun threshold */
+ /*
+ * HFI does not follow IB specs, save this value
+ * so we can report it, if asked.
+ */
+ ppd->overrun_threshold = val;
+ break;
+ case HFI1_IB_CFG_PHYERR_THRESH: /* IB PHY error threshold */
+ /*
+ * HFI does not follow IB specs, save this value
+ * so we can report it, if asked.
+ */
+ ppd->phy_error_threshold = val;
+ break;
+
+ case HFI1_IB_CFG_MTU:
+ set_send_length(ppd);
+ break;
+
+ case HFI1_IB_CFG_PKEYS:
+ if (HFI1_CAP_IS_KSET(PKEY_CHECK))
+ set_partition_keys(ppd);
+ break;
+
+ default:
+ if (HFI1_CAP_IS_KSET(PRINT_UNIMPL))
+ dd_dev_info(ppd->dd,
+ "%s: which %s, val 0x%x: not implemented\n",
+ __func__, ib_cfg_name(which), val);
+ break;
+ }
+ return ret;
+}
+
+/* begin functions related to vl arbitration table caching */
+static void init_vl_arb_caches(struct hfi1_pportdata *ppd)
+{
+ int i;
+
+ BUILD_BUG_ON(VL_ARB_TABLE_SIZE !=
+ VL_ARB_LOW_PRIO_TABLE_SIZE);
+ BUILD_BUG_ON(VL_ARB_TABLE_SIZE !=
+ VL_ARB_HIGH_PRIO_TABLE_SIZE);
+
+ /*
+ * Note that we always return values directly from the
+ * 'vl_arb_cache' (and do no CSR reads) in response to a
+ * 'Get(VLArbTable)'. This is obviously correct after a
+ * 'Set(VLArbTable)', since the cache will then be up to
+ * date. But it's also correct prior to any 'Set(VLArbTable)'
+ * since then both the cache, and the relevant h/w registers
+ * will be zeroed.
+ */
+
+ for (i = 0; i < MAX_PRIO_TABLE; i++)
+ spin_lock_init(&ppd->vl_arb_cache[i].lock);
+}
+
+/*
+ * vl_arb_lock_cache
+ *
+ * All other vl_arb_* functions should be called only after locking
+ * the cache.
+ */
+static inline struct vl_arb_cache *
+vl_arb_lock_cache(struct hfi1_pportdata *ppd, int idx)
+{
+ if (idx != LO_PRIO_TABLE && idx != HI_PRIO_TABLE)
+ return NULL;
+ spin_lock(&ppd->vl_arb_cache[idx].lock);
+ return &ppd->vl_arb_cache[idx];
+}
+
+static inline void vl_arb_unlock_cache(struct hfi1_pportdata *ppd, int idx)
+{
+ spin_unlock(&ppd->vl_arb_cache[idx].lock);
+}
+
+static void vl_arb_get_cache(struct vl_arb_cache *cache,
+ struct ib_vl_weight_elem *vl)
+{
+ memcpy(vl, cache->table, VL_ARB_TABLE_SIZE * sizeof(*vl));
+}
+
+static void vl_arb_set_cache(struct vl_arb_cache *cache,
+ struct ib_vl_weight_elem *vl)
+{
+ memcpy(cache->table, vl, VL_ARB_TABLE_SIZE * sizeof(*vl));
+}
+
+static int vl_arb_match_cache(struct vl_arb_cache *cache,
+ struct ib_vl_weight_elem *vl)
+{
+ return !memcmp(cache->table, vl, VL_ARB_TABLE_SIZE * sizeof(*vl));
+}
+/* end functions related to vl arbitration table caching */
+
+static int set_vl_weights(struct hfi1_pportdata *ppd, u32 target,
+ u32 size, struct ib_vl_weight_elem *vl)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ u64 reg;
+ unsigned int i, is_up = 0;
+ int drain, ret = 0;
+
+ mutex_lock(&ppd->hls_lock);
+
+ if (ppd->host_link_state & HLS_UP)
+ is_up = 1;
+
+ drain = !is_ax(dd) && is_up;
+
+ if (drain)
+ /*
+ * Before adjusting VL arbitration weights, empty per-VL
+ * FIFOs, otherwise a packet whose VL weight is being
+ * set to 0 could get stuck in a FIFO with no chance to
+ * egress.
+ */
+ ret = stop_drain_data_vls(dd);
+
+ if (ret) {
+ dd_dev_err(
+ dd,
+ "%s: cannot stop/drain VLs - refusing to change VL arbitration weights\n",
+ __func__);
+ goto err;
+ }
+
+ for (i = 0; i < size; i++, vl++) {
+ /*
+ * NOTE: The low priority shift and mask are used here, but
+ * they are the same for both the low and high registers.
+ */
+ reg = (((u64)vl->vl & SEND_LOW_PRIORITY_LIST_VL_MASK)
+ << SEND_LOW_PRIORITY_LIST_VL_SHIFT)
+ | (((u64)vl->weight
+ & SEND_LOW_PRIORITY_LIST_WEIGHT_MASK)
+ << SEND_LOW_PRIORITY_LIST_WEIGHT_SHIFT);
+ write_csr(dd, target + (i * 8), reg);
+ }
+ pio_send_control(dd, PSC_GLOBAL_VLARB_ENABLE);
+
+ if (drain)
+ open_fill_data_vls(dd); /* reopen all VLs */
+
+err:
+ mutex_unlock(&ppd->hls_lock);
+
+ return ret;
+}
+
+/*
+ * Read one credit merge VL register.
+ */
+static void read_one_cm_vl(struct hfi1_devdata *dd, u32 csr,
+ struct vl_limit *vll)
+{
+ u64 reg = read_csr(dd, csr);
+
+ vll->dedicated = cpu_to_be16(
+ (reg >> SEND_CM_CREDIT_VL_DEDICATED_LIMIT_VL_SHIFT)
+ & SEND_CM_CREDIT_VL_DEDICATED_LIMIT_VL_MASK);
+ vll->shared = cpu_to_be16(
+ (reg >> SEND_CM_CREDIT_VL_SHARED_LIMIT_VL_SHIFT)
+ & SEND_CM_CREDIT_VL_SHARED_LIMIT_VL_MASK);
+}
+
+/*
+ * Read the current credit merge limits.
+ */
+static int get_buffer_control(struct hfi1_devdata *dd,
+ struct buffer_control *bc, u16 *overall_limit)
+{
+ u64 reg;
+ int i;
+
+ /* not all entries are filled in */
+ memset(bc, 0, sizeof(*bc));
+
+ /* OPA and HFI have a 1-1 mapping */
+ for (i = 0; i < TXE_NUM_DATA_VL; i++)
+ read_one_cm_vl(dd, SEND_CM_CREDIT_VL + (8*i), &bc->vl[i]);
+
+ /* NOTE: assumes that VL* and VL15 CSRs are bit-wise identical */
+ read_one_cm_vl(dd, SEND_CM_CREDIT_VL15, &bc->vl[15]);
+
+ reg = read_csr(dd, SEND_CM_GLOBAL_CREDIT);
+ bc->overall_shared_limit = cpu_to_be16(
+ (reg >> SEND_CM_GLOBAL_CREDIT_SHARED_LIMIT_SHIFT)
+ & SEND_CM_GLOBAL_CREDIT_SHARED_LIMIT_MASK);
+ if (overall_limit)
+ *overall_limit = (reg
+ >> SEND_CM_GLOBAL_CREDIT_TOTAL_CREDIT_LIMIT_SHIFT)
+ & SEND_CM_GLOBAL_CREDIT_TOTAL_CREDIT_LIMIT_MASK;
+ return sizeof(struct buffer_control);
+}
+
+static int get_sc2vlnt(struct hfi1_devdata *dd, struct sc2vlnt *dp)
+{
+ u64 reg;
+ int i;
+
+ /* each register contains 16 SC->VLnt mappings, 4 bits each */
+ reg = read_csr(dd, DCC_CFG_SC_VL_TABLE_15_0);
+ for (i = 0; i < sizeof(u64); i++) {
+ u8 byte = *(((u8 *)®) + i);
+
+ dp->vlnt[2 * i] = byte & 0xf;
+ dp->vlnt[(2 * i) + 1] = (byte & 0xf0) >> 4;
+ }
+
+ reg = read_csr(dd, DCC_CFG_SC_VL_TABLE_31_16);
+ for (i = 0; i < sizeof(u64); i++) {
+ u8 byte = *(((u8 *)®) + i);
+
+ dp->vlnt[16 + (2 * i)] = byte & 0xf;
+ dp->vlnt[16 + (2 * i) + 1] = (byte & 0xf0) >> 4;
+ }
+ return sizeof(struct sc2vlnt);
+}
+
+static void get_vlarb_preempt(struct hfi1_devdata *dd, u32 nelems,
+ struct ib_vl_weight_elem *vl)
+{
+ unsigned int i;
+
+ for (i = 0; i < nelems; i++, vl++) {
+ vl->vl = 0xf;
+ vl->weight = 0;
+ }
+}
+
+static void set_sc2vlnt(struct hfi1_devdata *dd, struct sc2vlnt *dp)
+{
+ write_csr(dd, DCC_CFG_SC_VL_TABLE_15_0,
+ DC_SC_VL_VAL(15_0,
+ 0, dp->vlnt[0] & 0xf,
+ 1, dp->vlnt[1] & 0xf,
+ 2, dp->vlnt[2] & 0xf,
+ 3, dp->vlnt[3] & 0xf,
+ 4, dp->vlnt[4] & 0xf,
+ 5, dp->vlnt[5] & 0xf,
+ 6, dp->vlnt[6] & 0xf,
+ 7, dp->vlnt[7] & 0xf,
+ 8, dp->vlnt[8] & 0xf,
+ 9, dp->vlnt[9] & 0xf,
+ 10, dp->vlnt[10] & 0xf,
+ 11, dp->vlnt[11] & 0xf,
+ 12, dp->vlnt[12] & 0xf,
+ 13, dp->vlnt[13] & 0xf,
+ 14, dp->vlnt[14] & 0xf,
+ 15, dp->vlnt[15] & 0xf));
+ write_csr(dd, DCC_CFG_SC_VL_TABLE_31_16,
+ DC_SC_VL_VAL(31_16,
+ 16, dp->vlnt[16] & 0xf,
+ 17, dp->vlnt[17] & 0xf,
+ 18, dp->vlnt[18] & 0xf,
+ 19, dp->vlnt[19] & 0xf,
+ 20, dp->vlnt[20] & 0xf,
+ 21, dp->vlnt[21] & 0xf,
+ 22, dp->vlnt[22] & 0xf,
+ 23, dp->vlnt[23] & 0xf,
+ 24, dp->vlnt[24] & 0xf,
+ 25, dp->vlnt[25] & 0xf,
+ 26, dp->vlnt[26] & 0xf,
+ 27, dp->vlnt[27] & 0xf,
+ 28, dp->vlnt[28] & 0xf,
+ 29, dp->vlnt[29] & 0xf,
+ 30, dp->vlnt[30] & 0xf,
+ 31, dp->vlnt[31] & 0xf));
+}
+
+static void nonzero_msg(struct hfi1_devdata *dd, int idx, const char *what,
+ u16 limit)
+{
+ if (limit != 0)
+ dd_dev_info(dd, "Invalid %s limit %d on VL %d, ignoring\n",
+ what, (int)limit, idx);
+}
+
+/* change only the shared limit portion of SendCmGLobalCredit */
+static void set_global_shared(struct hfi1_devdata *dd, u16 limit)
+{
+ u64 reg;
+
+ reg = read_csr(dd, SEND_CM_GLOBAL_CREDIT);
+ reg &= ~SEND_CM_GLOBAL_CREDIT_SHARED_LIMIT_SMASK;
+ reg |= (u64)limit << SEND_CM_GLOBAL_CREDIT_SHARED_LIMIT_SHIFT;
+ write_csr(dd, SEND_CM_GLOBAL_CREDIT, reg);
+}
+
+/* change only the total credit limit portion of SendCmGLobalCredit */
+static void set_global_limit(struct hfi1_devdata *dd, u16 limit)
+{
+ u64 reg;
+
+ reg = read_csr(dd, SEND_CM_GLOBAL_CREDIT);
+ reg &= ~SEND_CM_GLOBAL_CREDIT_TOTAL_CREDIT_LIMIT_SMASK;
+ reg |= (u64)limit << SEND_CM_GLOBAL_CREDIT_TOTAL_CREDIT_LIMIT_SHIFT;
+ write_csr(dd, SEND_CM_GLOBAL_CREDIT, reg);
+}
+
+/* set the given per-VL shared limit */
+static void set_vl_shared(struct hfi1_devdata *dd, int vl, u16 limit)
+{
+ u64 reg;
+ u32 addr;
+
+ if (vl < TXE_NUM_DATA_VL)
+ addr = SEND_CM_CREDIT_VL + (8 * vl);
+ else
+ addr = SEND_CM_CREDIT_VL15;
+
+ reg = read_csr(dd, addr);
+ reg &= ~SEND_CM_CREDIT_VL_SHARED_LIMIT_VL_SMASK;
+ reg |= (u64)limit << SEND_CM_CREDIT_VL_SHARED_LIMIT_VL_SHIFT;
+ write_csr(dd, addr, reg);
+}
+
+/* set the given per-VL dedicated limit */
+static void set_vl_dedicated(struct hfi1_devdata *dd, int vl, u16 limit)
+{
+ u64 reg;
+ u32 addr;
+
+ if (vl < TXE_NUM_DATA_VL)
+ addr = SEND_CM_CREDIT_VL + (8 * vl);
+ else
+ addr = SEND_CM_CREDIT_VL15;
+
+ reg = read_csr(dd, addr);
+ reg &= ~SEND_CM_CREDIT_VL_DEDICATED_LIMIT_VL_SMASK;
+ reg |= (u64)limit << SEND_CM_CREDIT_VL_DEDICATED_LIMIT_VL_SHIFT;
+ write_csr(dd, addr, reg);
+}
+
+/* spin until the given per-VL status mask bits clear */
+static void wait_for_vl_status_clear(struct hfi1_devdata *dd, u64 mask,
+ const char *which)
+{
+ unsigned long timeout;
+ u64 reg;
+
+ timeout = jiffies + msecs_to_jiffies(VL_STATUS_CLEAR_TIMEOUT);
+ while (1) {
+ reg = read_csr(dd, SEND_CM_CREDIT_USED_STATUS) & mask;
+
+ if (reg == 0)
+ return; /* success */
+ if (time_after(jiffies, timeout))
+ break; /* timed out */
+ udelay(1);
+ }
+
+ dd_dev_err(dd,
+ "%s credit change status not clearing after %dms, mask 0x%llx, not clear 0x%llx\n",
+ which, VL_STATUS_CLEAR_TIMEOUT, mask, reg);
+ /*
+ * If this occurs, it is likely there was a credit loss on the link.
+ * The only recovery from that is a link bounce.
+ */
+ dd_dev_err(dd,
+ "Continuing anyway. A credit loss may occur. Suggest a link bounce\n");
+}
+
+/*
+ * The number of credits on the VLs may be changed while everything
+ * is "live", but the following algorithm must be followed due to
+ * how the hardware is actually implemented. In particular,
+ * Return_Credit_Status[] is the only correct status check.
+ *
+ * if (reducing Global_Shared_Credit_Limit or any shared limit changing)
+ * set Global_Shared_Credit_Limit = 0
+ * use_all_vl = 1
+ * mask0 = all VLs that are changing either dedicated or shared limits
+ * set Shared_Limit[mask0] = 0
+ * spin until Return_Credit_Status[use_all_vl ? all VL : mask0] == 0
+ * if (changing any dedicated limit)
+ * mask1 = all VLs that are lowering dedicated limits
+ * lower Dedicated_Limit[mask1]
+ * spin until Return_Credit_Status[mask1] == 0
+ * raise Dedicated_Limits
+ * raise Shared_Limits
+ * raise Global_Shared_Credit_Limit
+ *
+ * lower = if the new limit is lower, set the limit to the new value
+ * raise = if the new limit is higher than the current value (may be changed
+ * earlier in the algorithm), set the new limit to the new value
+ */
+static int set_buffer_control(struct hfi1_devdata *dd,
+ struct buffer_control *new_bc)
+{
+ u64 changing_mask, ld_mask, stat_mask;
+ int change_count;
+ int i, use_all_mask;
+ int this_shared_changing;
+ /*
+ * A0: add the variable any_shared_limit_changing below and in the
+ * algorithm above. If removing A0 support, it can be removed.
+ */
+ int any_shared_limit_changing;
+ struct buffer_control cur_bc;
+ u8 changing[OPA_MAX_VLS];
+ u8 lowering_dedicated[OPA_MAX_VLS];
+ u16 cur_total;
+ u32 new_total = 0;
+ const u64 all_mask =
+ SEND_CM_CREDIT_USED_STATUS_VL0_RETURN_CREDIT_STATUS_SMASK
+ | SEND_CM_CREDIT_USED_STATUS_VL1_RETURN_CREDIT_STATUS_SMASK
+ | SEND_CM_CREDIT_USED_STATUS_VL2_RETURN_CREDIT_STATUS_SMASK
+ | SEND_CM_CREDIT_USED_STATUS_VL3_RETURN_CREDIT_STATUS_SMASK
+ | SEND_CM_CREDIT_USED_STATUS_VL4_RETURN_CREDIT_STATUS_SMASK
+ | SEND_CM_CREDIT_USED_STATUS_VL5_RETURN_CREDIT_STATUS_SMASK
+ | SEND_CM_CREDIT_USED_STATUS_VL6_RETURN_CREDIT_STATUS_SMASK
+ | SEND_CM_CREDIT_USED_STATUS_VL7_RETURN_CREDIT_STATUS_SMASK
+ | SEND_CM_CREDIT_USED_STATUS_VL15_RETURN_CREDIT_STATUS_SMASK;
+
+#define valid_vl(idx) ((idx) < TXE_NUM_DATA_VL || (idx) == 15)
+#define NUM_USABLE_VLS 16 /* look at VL15 and less */
+
+
+ /* find the new total credits, do sanity check on unused VLs */
+ for (i = 0; i < OPA_MAX_VLS; i++) {
+ if (valid_vl(i)) {
+ new_total += be16_to_cpu(new_bc->vl[i].dedicated);
+ continue;
+ }
+ nonzero_msg(dd, i, "dedicated",
+ be16_to_cpu(new_bc->vl[i].dedicated));
+ nonzero_msg(dd, i, "shared",
+ be16_to_cpu(new_bc->vl[i].shared));
+ new_bc->vl[i].dedicated = 0;
+ new_bc->vl[i].shared = 0;
+ }
+ new_total += be16_to_cpu(new_bc->overall_shared_limit);
+ if (new_total > (u32)dd->link_credits)
+ return -EINVAL;
+ /* fetch the current values */
+ get_buffer_control(dd, &cur_bc, &cur_total);
+
+ /*
+ * Create the masks we will use.
+ */
+ memset(changing, 0, sizeof(changing));
+ memset(lowering_dedicated, 0, sizeof(lowering_dedicated));
+ /* NOTE: Assumes that the individual VL bits are adjacent and in
+ increasing order */
+ stat_mask =
+ SEND_CM_CREDIT_USED_STATUS_VL0_RETURN_CREDIT_STATUS_SMASK;
+ changing_mask = 0;
+ ld_mask = 0;
+ change_count = 0;
+ any_shared_limit_changing = 0;
+ for (i = 0; i < NUM_USABLE_VLS; i++, stat_mask <<= 1) {
+ if (!valid_vl(i))
+ continue;
+ this_shared_changing = new_bc->vl[i].shared
+ != cur_bc.vl[i].shared;
+ if (this_shared_changing)
+ any_shared_limit_changing = 1;
+ if (new_bc->vl[i].dedicated != cur_bc.vl[i].dedicated
+ || this_shared_changing) {
+ changing[i] = 1;
+ changing_mask |= stat_mask;
+ change_count++;
+ }
+ if (be16_to_cpu(new_bc->vl[i].dedicated) <
+ be16_to_cpu(cur_bc.vl[i].dedicated)) {
+ lowering_dedicated[i] = 1;
+ ld_mask |= stat_mask;
+ }
+ }
+
+ /* bracket the credit change with a total adjustment */
+ if (new_total > cur_total)
+ set_global_limit(dd, new_total);
+
+ /*
+ * Start the credit change algorithm.
+ */
+ use_all_mask = 0;
+ if ((be16_to_cpu(new_bc->overall_shared_limit) <
+ be16_to_cpu(cur_bc.overall_shared_limit))
+ || (is_a0(dd) && any_shared_limit_changing)) {
+ set_global_shared(dd, 0);
+ cur_bc.overall_shared_limit = 0;
+ use_all_mask = 1;
+ }
+
+ for (i = 0; i < NUM_USABLE_VLS; i++) {
+ if (!valid_vl(i))
+ continue;
+
+ if (changing[i]) {
+ set_vl_shared(dd, i, 0);
+ cur_bc.vl[i].shared = 0;
+ }
+ }
+
+ wait_for_vl_status_clear(dd, use_all_mask ? all_mask : changing_mask,
+ "shared");
+
+ if (change_count > 0) {
+ for (i = 0; i < NUM_USABLE_VLS; i++) {
+ if (!valid_vl(i))
+ continue;
+
+ if (lowering_dedicated[i]) {
+ set_vl_dedicated(dd, i,
+ be16_to_cpu(new_bc->vl[i].dedicated));
+ cur_bc.vl[i].dedicated =
+ new_bc->vl[i].dedicated;
+ }
+ }
+
+ wait_for_vl_status_clear(dd, ld_mask, "dedicated");
+
+ /* now raise all dedicated that are going up */
+ for (i = 0; i < NUM_USABLE_VLS; i++) {
+ if (!valid_vl(i))
+ continue;
+
+ if (be16_to_cpu(new_bc->vl[i].dedicated) >
+ be16_to_cpu(cur_bc.vl[i].dedicated))
+ set_vl_dedicated(dd, i,
+ be16_to_cpu(new_bc->vl[i].dedicated));
+ }
+ }
+
+ /* next raise all shared that are going up */
+ for (i = 0; i < NUM_USABLE_VLS; i++) {
+ if (!valid_vl(i))
+ continue;
+
+ if (be16_to_cpu(new_bc->vl[i].shared) >
+ be16_to_cpu(cur_bc.vl[i].shared))
+ set_vl_shared(dd, i, be16_to_cpu(new_bc->vl[i].shared));
+ }
+
+ /* finally raise the global shared */
+ if (be16_to_cpu(new_bc->overall_shared_limit) >
+ be16_to_cpu(cur_bc.overall_shared_limit))
+ set_global_shared(dd,
+ be16_to_cpu(new_bc->overall_shared_limit));
+
+ /* bracket the credit change with a total adjustment */
+ if (new_total < cur_total)
+ set_global_limit(dd, new_total);
+ return 0;
+}
+
+/*
+ * Read the given fabric manager table. Return the size of the
+ * table (in bytes) on success, and a negative error code on
+ * failure.
+ */
+int fm_get_table(struct hfi1_pportdata *ppd, int which, void *t)
+
+{
+ int size;
+ struct vl_arb_cache *vlc;
+
+ switch (which) {
+ case FM_TBL_VL_HIGH_ARB:
+ size = 256;
+ /*
+ * OPA specifies 128 elements (of 2 bytes each), though
+ * HFI supports only 16 elements in h/w.
+ */
+ vlc = vl_arb_lock_cache(ppd, HI_PRIO_TABLE);
+ vl_arb_get_cache(vlc, t);
+ vl_arb_unlock_cache(ppd, HI_PRIO_TABLE);
+ break;
+ case FM_TBL_VL_LOW_ARB:
+ size = 256;
+ /*
+ * OPA specifies 128 elements (of 2 bytes each), though
+ * HFI supports only 16 elements in h/w.
+ */
+ vlc = vl_arb_lock_cache(ppd, LO_PRIO_TABLE);
+ vl_arb_get_cache(vlc, t);
+ vl_arb_unlock_cache(ppd, LO_PRIO_TABLE);
+ break;
+ case FM_TBL_BUFFER_CONTROL:
+ size = get_buffer_control(ppd->dd, t, NULL);
+ break;
+ case FM_TBL_SC2VLNT:
+ size = get_sc2vlnt(ppd->dd, t);
+ break;
+ case FM_TBL_VL_PREEMPT_ELEMS:
+ size = 256;
+ /* OPA specifies 128 elements, of 2 bytes each */
+ get_vlarb_preempt(ppd->dd, OPA_MAX_VLS, t);
+ break;
+ case FM_TBL_VL_PREEMPT_MATRIX:
+ size = 256;
+ /*
+ * OPA specifies that this is the same size as the VL
+ * arbitration tables (i.e., 256 bytes).
+ */
+ break;
+ default:
+ return -EINVAL;
+ }
+ return size;
+}
+
+/*
+ * Write the given fabric manager table.
+ */
+int fm_set_table(struct hfi1_pportdata *ppd, int which, void *t)
+{
+ int ret = 0;
+ struct vl_arb_cache *vlc;
+
+ switch (which) {
+ case FM_TBL_VL_HIGH_ARB:
+ vlc = vl_arb_lock_cache(ppd, HI_PRIO_TABLE);
+ if (vl_arb_match_cache(vlc, t)) {
+ vl_arb_unlock_cache(ppd, HI_PRIO_TABLE);
+ break;
+ }
+ vl_arb_set_cache(vlc, t);
+ vl_arb_unlock_cache(ppd, HI_PRIO_TABLE);
+ ret = set_vl_weights(ppd, SEND_HIGH_PRIORITY_LIST,
+ VL_ARB_HIGH_PRIO_TABLE_SIZE, t);
+ break;
+ case FM_TBL_VL_LOW_ARB:
+ vlc = vl_arb_lock_cache(ppd, LO_PRIO_TABLE);
+ if (vl_arb_match_cache(vlc, t)) {
+ vl_arb_unlock_cache(ppd, LO_PRIO_TABLE);
+ break;
+ }
+ vl_arb_set_cache(vlc, t);
+ vl_arb_unlock_cache(ppd, LO_PRIO_TABLE);
+ ret = set_vl_weights(ppd, SEND_LOW_PRIORITY_LIST,
+ VL_ARB_LOW_PRIO_TABLE_SIZE, t);
+ break;
+ case FM_TBL_BUFFER_CONTROL:
+ ret = set_buffer_control(ppd->dd, t);
+ break;
+ case FM_TBL_SC2VLNT:
+ set_sc2vlnt(ppd->dd, t);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+/*
+ * Disable all data VLs.
+ *
+ * Return 0 if disabled, non-zero if the VLs cannot be disabled.
+ */
+static int disable_data_vls(struct hfi1_devdata *dd)
+{
+ if (is_a0(dd))
+ return 1;
+
+ pio_send_control(dd, PSC_DATA_VL_DISABLE);
+
+ return 0;
+}
+
+/*
+ * open_fill_data_vls() - the counterpart to stop_drain_data_vls().
+ * Just re-enables all data VLs (the "fill" part happens
+ * automatically - the name was chosen for symmetry with
+ * stop_drain_data_vls()).
+ *
+ * Return 0 if successful, non-zero if the VLs cannot be enabled.
+ */
+int open_fill_data_vls(struct hfi1_devdata *dd)
+{
+ if (is_a0(dd))
+ return 1;
+
+ pio_send_control(dd, PSC_DATA_VL_ENABLE);
+
+ return 0;
+}
+
+/*
+ * drain_data_vls() - assumes that disable_data_vls() has been called,
+ * wait for occupancy (of per-VL FIFOs) for all contexts, and SDMA
+ * engines to drop to 0.
+ */
+static void drain_data_vls(struct hfi1_devdata *dd)
+{
+ sc_wait(dd);
+ sdma_wait(dd);
+ pause_for_credit_return(dd);
+}
+
+/*
+ * stop_drain_data_vls() - disable, then drain all per-VL fifos.
+ *
+ * Use open_fill_data_vls() to resume using data VLs. This pair is
+ * meant to be used like this:
+ *
+ * stop_drain_data_vls(dd);
+ * // do things with per-VL resources
+ * open_fill_data_vls(dd);
+ */
+int stop_drain_data_vls(struct hfi1_devdata *dd)
+{
+ int ret;
+
+ ret = disable_data_vls(dd);
+ if (ret == 0)
+ drain_data_vls(dd);
+
+ return ret;
+}
+
+/*
+ * Convert a nanosecond time to a cclock count. No matter how slow
+ * the cclock, a non-zero ns will always have a non-zero result.
+ */
+u32 ns_to_cclock(struct hfi1_devdata *dd, u32 ns)
+{
+ u32 cclocks;
+
+ if (dd->icode == ICODE_FPGA_EMULATION)
+ cclocks = (ns * 1000) / FPGA_CCLOCK_PS;
+ else /* simulation pretends to be ASIC */
+ cclocks = (ns * 1000) / ASIC_CCLOCK_PS;
+ if (ns && !cclocks) /* if ns nonzero, must be at least 1 */
+ cclocks = 1;
+ return cclocks;
+}
+
+/*
+ * Convert a cclock count to nanoseconds. Not matter how slow
+ * the cclock, a non-zero cclocks will always have a non-zero result.
+ */
+u32 cclock_to_ns(struct hfi1_devdata *dd, u32 cclocks)
+{
+ u32 ns;
+
+ if (dd->icode == ICODE_FPGA_EMULATION)
+ ns = (cclocks * FPGA_CCLOCK_PS) / 1000;
+ else /* simulation pretends to be ASIC */
+ ns = (cclocks * ASIC_CCLOCK_PS) / 1000;
+ if (cclocks && !ns)
+ ns = 1;
+ return ns;
+}
+
+/*
+ * Dynamically adjust the receive interrupt timeout for a context based on
+ * incoming packet rate.
+ *
+ * NOTE: Dynamic adjustment does not allow rcv_intr_count to be zero.
+ */
+static void adjust_rcv_timeout(struct hfi1_ctxtdata *rcd, u32 npkts)
+{
+ struct hfi1_devdata *dd = rcd->dd;
+ u32 timeout = rcd->rcvavail_timeout;
+
+ /*
+ * This algorithm doubles or halves the timeout depending on whether
+ * the number of packets received in this interrupt were less than or
+ * greater equal the interrupt count.
+ *
+ * The calculations below do not allow a steady state to be achieved.
+ * Only at the endpoints it is possible to have an unchanging
+ * timeout.
+ */
+ if (npkts < rcv_intr_count) {
+ /*
+ * Not enough packets arrived before the timeout, adjust
+ * timeout downward.
+ */
+ if (timeout < 2) /* already at minimum? */
+ return;
+ timeout >>= 1;
+ } else {
+ /*
+ * More than enough packets arrived before the timeout, adjust
+ * timeout upward.
+ */
+ if (timeout >= dd->rcv_intr_timeout_csr) /* already at max? */
+ return;
+ timeout = min(timeout << 1, dd->rcv_intr_timeout_csr);
+ }
+
+ rcd->rcvavail_timeout = timeout;
+ /* timeout cannot be larger than rcv_intr_timeout_csr which has already
+ been verified to be in range */
+ write_kctxt_csr(dd, rcd->ctxt, RCV_AVAIL_TIME_OUT,
+ (u64)timeout << RCV_AVAIL_TIME_OUT_TIME_OUT_RELOAD_SHIFT);
+}
+
+void update_usrhead(struct hfi1_ctxtdata *rcd, u32 hd, u32 updegr, u32 egrhd,
+ u32 intr_adjust, u32 npkts)
+{
+ struct hfi1_devdata *dd = rcd->dd;
+ u64 reg;
+ u32 ctxt = rcd->ctxt;
+
+ /*
+ * Need to write timeout register before updating RcvHdrHead to ensure
+ * that a new value is used when the HW decides to restart counting.
+ */
+ if (intr_adjust)
+ adjust_rcv_timeout(rcd, npkts);
+ if (updegr) {
+ reg = (egrhd & RCV_EGR_INDEX_HEAD_HEAD_MASK)
+ << RCV_EGR_INDEX_HEAD_HEAD_SHIFT;
+ write_uctxt_csr(dd, ctxt, RCV_EGR_INDEX_HEAD, reg);
+ }
+ mmiowb();
+ reg = ((u64)rcv_intr_count << RCV_HDR_HEAD_COUNTER_SHIFT) |
+ (((u64)hd & RCV_HDR_HEAD_HEAD_MASK)
+ << RCV_HDR_HEAD_HEAD_SHIFT);
+ write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, reg);
+ mmiowb();
+}
+
+u32 hdrqempty(struct hfi1_ctxtdata *rcd)
+{
+ u32 head, tail;
+
+ head = (read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_HEAD)
+ & RCV_HDR_HEAD_HEAD_SMASK) >> RCV_HDR_HEAD_HEAD_SHIFT;
+
+ if (rcd->rcvhdrtail_kvaddr)
+ tail = get_rcvhdrtail(rcd);
+ else
+ tail = read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_TAIL);
+
+ return head == tail;
+}
+
+/*
+ * Context Control and Receive Array encoding for buffer size:
+ * 0x0 invalid
+ * 0x1 4 KB
+ * 0x2 8 KB
+ * 0x3 16 KB
+ * 0x4 32 KB
+ * 0x5 64 KB
+ * 0x6 128 KB
+ * 0x7 256 KB
+ * 0x8 512 KB (Receive Array only)
+ * 0x9 1 MB (Receive Array only)
+ * 0xa 2 MB (Receive Array only)
+ *
+ * 0xB-0xF - reserved (Receive Array only)
+ *
+ *
+ * This routine assumes that the value has already been sanity checked.
+ */
+static u32 encoded_size(u32 size)
+{
+ switch (size) {
+ case 4*1024: return 0x1;
+ case 8*1024: return 0x2;
+ case 16*1024: return 0x3;
+ case 32*1024: return 0x4;
+ case 64*1024: return 0x5;
+ case 128*1024: return 0x6;
+ case 256*1024: return 0x7;
+ case 512*1024: return 0x8;
+ case 1*1024*1024: return 0x9;
+ case 2*1024*1024: return 0xa;
+ }
+ return 0x1; /* if invalid, go with the minimum size */
+}
+
+void hfi1_rcvctrl(struct hfi1_devdata *dd, unsigned int op, int ctxt)
+{
+ struct hfi1_ctxtdata *rcd;
+ u64 rcvctrl, reg;
+ int did_enable = 0;
+
+ rcd = dd->rcd[ctxt];
+ if (!rcd)
+ return;
+
+ hfi1_cdbg(RCVCTRL, "ctxt %d op 0x%x", ctxt, op);
+
+ rcvctrl = read_kctxt_csr(dd, ctxt, RCV_CTXT_CTRL);
+ /* if the context already enabled, don't do the extra steps */
+ if ((op & HFI1_RCVCTRL_CTXT_ENB)
+ && !(rcvctrl & RCV_CTXT_CTRL_ENABLE_SMASK)) {
+ /* reset the tail and hdr addresses, and sequence count */
+ write_kctxt_csr(dd, ctxt, RCV_HDR_ADDR,
+ rcd->rcvhdrq_phys);
+ if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL))
+ write_kctxt_csr(dd, ctxt, RCV_HDR_TAIL_ADDR,
+ rcd->rcvhdrqtailaddr_phys);
+ rcd->seq_cnt = 1;
+
+ /* reset the cached receive header queue head value */
+ rcd->head = 0;
+
+ /*
+ * Zero the receive header queue so we don't get false
+ * positives when checking the sequence number. The
+ * sequence numbers could land exactly on the same spot.
+ * E.g. a rcd restart before the receive header wrapped.
+ */
+ memset(rcd->rcvhdrq, 0, rcd->rcvhdrq_size);
+
+ /* starting timeout */
+ rcd->rcvavail_timeout = dd->rcv_intr_timeout_csr;
+
+ /* enable the context */
+ rcvctrl |= RCV_CTXT_CTRL_ENABLE_SMASK;
+
+ /* clean the egr buffer size first */
+ rcvctrl &= ~RCV_CTXT_CTRL_EGR_BUF_SIZE_SMASK;
+ rcvctrl |= ((u64)encoded_size(rcd->egrbufs.rcvtid_size)
+ & RCV_CTXT_CTRL_EGR_BUF_SIZE_MASK)
+ << RCV_CTXT_CTRL_EGR_BUF_SIZE_SHIFT;
+
+ /* zero RcvHdrHead - set RcvHdrHead.Counter after enable */
+ write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, 0);
+ did_enable = 1;
+
+ /* zero RcvEgrIndexHead */
+ write_uctxt_csr(dd, ctxt, RCV_EGR_INDEX_HEAD, 0);
+
+ /* set eager count and base index */
+ reg = (((u64)(rcd->egrbufs.alloced >> RCV_SHIFT)
+ & RCV_EGR_CTRL_EGR_CNT_MASK)
+ << RCV_EGR_CTRL_EGR_CNT_SHIFT) |
+ (((rcd->eager_base >> RCV_SHIFT)
+ & RCV_EGR_CTRL_EGR_BASE_INDEX_MASK)
+ << RCV_EGR_CTRL_EGR_BASE_INDEX_SHIFT);
+ write_kctxt_csr(dd, ctxt, RCV_EGR_CTRL, reg);
+
+ /*
+ * Set TID (expected) count and base index.
+ * rcd->expected_count is set to individual RcvArray entries,
+ * not pairs, and the CSR takes a pair-count in groups of
+ * four, so divide by 8.
+ */
+ reg = (((rcd->expected_count >> RCV_SHIFT)
+ & RCV_TID_CTRL_TID_PAIR_CNT_MASK)
+ << RCV_TID_CTRL_TID_PAIR_CNT_SHIFT) |
+ (((rcd->expected_base >> RCV_SHIFT)
+ & RCV_TID_CTRL_TID_BASE_INDEX_MASK)
+ << RCV_TID_CTRL_TID_BASE_INDEX_SHIFT);
+ write_kctxt_csr(dd, ctxt, RCV_TID_CTRL, reg);
+ if (ctxt == VL15CTXT)
+ write_csr(dd, RCV_VL15, VL15CTXT);
+ }
+ if (op & HFI1_RCVCTRL_CTXT_DIS) {
+ write_csr(dd, RCV_VL15, 0);
+ rcvctrl &= ~RCV_CTXT_CTRL_ENABLE_SMASK;
+ }
+ if (op & HFI1_RCVCTRL_INTRAVAIL_ENB)
+ rcvctrl |= RCV_CTXT_CTRL_INTR_AVAIL_SMASK;
+ if (op & HFI1_RCVCTRL_INTRAVAIL_DIS)
+ rcvctrl &= ~RCV_CTXT_CTRL_INTR_AVAIL_SMASK;
+ if (op & HFI1_RCVCTRL_TAILUPD_ENB && rcd->rcvhdrqtailaddr_phys)
+ rcvctrl |= RCV_CTXT_CTRL_TAIL_UPD_SMASK;
+ if (op & HFI1_RCVCTRL_TAILUPD_DIS)
+ rcvctrl &= ~RCV_CTXT_CTRL_TAIL_UPD_SMASK;
+ if (op & HFI1_RCVCTRL_TIDFLOW_ENB)
+ rcvctrl |= RCV_CTXT_CTRL_TID_FLOW_ENABLE_SMASK;
+ if (op & HFI1_RCVCTRL_TIDFLOW_DIS)
+ rcvctrl &= ~RCV_CTXT_CTRL_TID_FLOW_ENABLE_SMASK;
+ if (op & HFI1_RCVCTRL_ONE_PKT_EGR_ENB) {
+ /* In one-packet-per-eager mode, the size comes from
+ the RcvArray entry. */
+ rcvctrl &= ~RCV_CTXT_CTRL_EGR_BUF_SIZE_SMASK;
+ rcvctrl |= RCV_CTXT_CTRL_ONE_PACKET_PER_EGR_BUFFER_SMASK;
+ }
+ if (op & HFI1_RCVCTRL_ONE_PKT_EGR_DIS)
+ rcvctrl &= ~RCV_CTXT_CTRL_ONE_PACKET_PER_EGR_BUFFER_SMASK;
+ if (op & HFI1_RCVCTRL_NO_RHQ_DROP_ENB)
+ rcvctrl |= RCV_CTXT_CTRL_DONT_DROP_RHQ_FULL_SMASK;
+ if (op & HFI1_RCVCTRL_NO_RHQ_DROP_DIS)
+ rcvctrl &= ~RCV_CTXT_CTRL_DONT_DROP_RHQ_FULL_SMASK;
+ if (op & HFI1_RCVCTRL_NO_EGR_DROP_ENB)
+ rcvctrl |= RCV_CTXT_CTRL_DONT_DROP_EGR_FULL_SMASK;
+ if (op & HFI1_RCVCTRL_NO_EGR_DROP_DIS)
+ rcvctrl &= ~RCV_CTXT_CTRL_DONT_DROP_EGR_FULL_SMASK;
+ rcd->rcvctrl = rcvctrl;
+ hfi1_cdbg(RCVCTRL, "ctxt %d rcvctrl 0x%llx\n", ctxt, rcvctrl);
+ write_kctxt_csr(dd, ctxt, RCV_CTXT_CTRL, rcd->rcvctrl);
+
+ /* work around sticky RcvCtxtStatus.BlockedRHQFull */
+ if (did_enable
+ && (rcvctrl & RCV_CTXT_CTRL_DONT_DROP_RHQ_FULL_SMASK)) {
+ reg = read_kctxt_csr(dd, ctxt, RCV_CTXT_STATUS);
+ if (reg != 0) {
+ dd_dev_info(dd, "ctxt %d status %lld (blocked)\n",
+ ctxt, reg);
+ read_uctxt_csr(dd, ctxt, RCV_HDR_HEAD);
+ write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, 0x10);
+ write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, 0x00);
+ read_uctxt_csr(dd, ctxt, RCV_HDR_HEAD);
+ reg = read_kctxt_csr(dd, ctxt, RCV_CTXT_STATUS);
+ dd_dev_info(dd, "ctxt %d status %lld (%s blocked)\n",
+ ctxt, reg, reg == 0 ? "not" : "still");
+ }
+ }
+
+ if (did_enable) {
+ /*
+ * The interrupt timeout and count must be set after
+ * the context is enabled to take effect.
+ */
+ /* set interrupt timeout */
+ write_kctxt_csr(dd, ctxt, RCV_AVAIL_TIME_OUT,
+ (u64)rcd->rcvavail_timeout <<
+ RCV_AVAIL_TIME_OUT_TIME_OUT_RELOAD_SHIFT);
+
+ /* set RcvHdrHead.Counter, zero RcvHdrHead.Head (again) */
+ reg = (u64)rcv_intr_count << RCV_HDR_HEAD_COUNTER_SHIFT;
+ write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, reg);
+ }
+
+ if (op & (HFI1_RCVCTRL_TAILUPD_DIS | HFI1_RCVCTRL_CTXT_DIS))
+ /*
+ * If the context has been disabled and the Tail Update has
+ * been cleared, clear the RCV_HDR_TAIL_ADDR CSR so
+ * it doesn't contain an address that is invalid.
+ */
+ write_kctxt_csr(dd, ctxt, RCV_HDR_TAIL_ADDR, 0);
+}
+
+u32 hfi1_read_cntrs(struct hfi1_devdata *dd, loff_t pos, char **namep,
+ u64 **cntrp)
+{
+ int ret;
+ u64 val = 0;
+
+ if (namep) {
+ ret = dd->cntrnameslen;
+ if (pos != 0) {
+ dd_dev_err(dd, "read_cntrs does not support indexing");
+ return 0;
+ }
+ *namep = dd->cntrnames;
+ } else {
+ const struct cntr_entry *entry;
+ int i, j;
+
+ ret = (dd->ndevcntrs) * sizeof(u64);
+ if (pos != 0) {
+ dd_dev_err(dd, "read_cntrs does not support indexing");
+ return 0;
+ }
+
+ /* Get the start of the block of counters */
+ *cntrp = dd->cntrs;
+
+ /*
+ * Now go and fill in each counter in the block.
+ */
+ for (i = 0; i < DEV_CNTR_LAST; i++) {
+ entry = &dev_cntrs[i];
+ hfi1_cdbg(CNTR, "reading %s", entry->name);
+ if (entry->flags & CNTR_DISABLED) {
+ /* Nothing */
+ hfi1_cdbg(CNTR, "\tDisabled\n");
+ } else {
+ if (entry->flags & CNTR_VL) {
+ hfi1_cdbg(CNTR, "\tPer VL\n");
+ for (j = 0; j < C_VL_COUNT; j++) {
+ val = entry->rw_cntr(entry,
+ dd, j,
+ CNTR_MODE_R,
+ 0);
+ hfi1_cdbg(
+ CNTR,
+ "\t\tRead 0x%llx for %d\n",
+ val, j);
+ dd->cntrs[entry->offset + j] =
+ val;
+ }
+ } else {
+ val = entry->rw_cntr(entry, dd,
+ CNTR_INVALID_VL,
+ CNTR_MODE_R, 0);
+ dd->cntrs[entry->offset] = val;
+ hfi1_cdbg(CNTR, "\tRead 0x%llx", val);
+ }
+ }
+ }
+ }
+ return ret;
+}
+
+/*
+ * Used by sysfs to create files for hfi stats to read
+ */
+u32 hfi1_read_portcntrs(struct hfi1_devdata *dd, loff_t pos, u32 port,
+ char **namep, u64 **cntrp)
+{
+ int ret;
+ u64 val = 0;
+
+ if (namep) {
+ ret = dd->portcntrnameslen;
+ if (pos != 0) {
+ dd_dev_err(dd, "index not supported");
+ return 0;
+ }
+ *namep = dd->portcntrnames;
+ } else {
+ const struct cntr_entry *entry;
+ struct hfi1_pportdata *ppd;
+ int i, j;
+
+ ret = (dd->nportcntrs) * sizeof(u64);
+ if (pos != 0) {
+ dd_dev_err(dd, "indexing not supported");
+ return 0;
+ }
+ ppd = (struct hfi1_pportdata *)(dd + 1 + port);
+ *cntrp = ppd->cntrs;
+
+ for (i = 0; i < PORT_CNTR_LAST; i++) {
+ entry = &port_cntrs[i];
+ hfi1_cdbg(CNTR, "reading %s", entry->name);
+ if (entry->flags & CNTR_DISABLED) {
+ /* Nothing */
+ hfi1_cdbg(CNTR, "\tDisabled\n");
+ continue;
+ }
+
+ if (entry->flags & CNTR_VL) {
+ hfi1_cdbg(CNTR, "\tPer VL");
+ for (j = 0; j < C_VL_COUNT; j++) {
+ val = entry->rw_cntr(entry, ppd, j,
+ CNTR_MODE_R,
+ 0);
+ hfi1_cdbg(
+ CNTR,
+ "\t\tRead 0x%llx for %d",
+ val, j);
+ ppd->cntrs[entry->offset + j] = val;
+ }
+ } else {
+ val = entry->rw_cntr(entry, ppd,
+ CNTR_INVALID_VL,
+ CNTR_MODE_R,
+ 0);
+ ppd->cntrs[entry->offset] = val;
+ hfi1_cdbg(CNTR, "\tRead 0x%llx", val);
+ }
+ }
+ }
+ return ret;
+}
+
+static void free_cntrs(struct hfi1_devdata *dd)
+{
+ struct hfi1_pportdata *ppd;
+ int i;
+
+ if (dd->synth_stats_timer.data)
+ del_timer_sync(&dd->synth_stats_timer);
+ dd->synth_stats_timer.data = 0;
+ ppd = (struct hfi1_pportdata *)(dd + 1);
+ for (i = 0; i < dd->num_pports; i++, ppd++) {
+ kfree(ppd->cntrs);
+ kfree(ppd->scntrs);
+ free_percpu(ppd->ibport_data.rc_acks);
+ free_percpu(ppd->ibport_data.rc_qacks);
+ free_percpu(ppd->ibport_data.rc_delayed_comp);
+ ppd->cntrs = NULL;
+ ppd->scntrs = NULL;
+ ppd->ibport_data.rc_acks = NULL;
+ ppd->ibport_data.rc_qacks = NULL;
+ ppd->ibport_data.rc_delayed_comp = NULL;
+ }
+ kfree(dd->portcntrnames);
+ dd->portcntrnames = NULL;
+ kfree(dd->cntrs);
+ dd->cntrs = NULL;
+ kfree(dd->scntrs);
+ dd->scntrs = NULL;
+ kfree(dd->cntrnames);
+ dd->cntrnames = NULL;
+}
+
+#define CNTR_MAX 0xFFFFFFFFFFFFFFFFULL
+#define CNTR_32BIT_MAX 0x00000000FFFFFFFF
+
+static u64 read_dev_port_cntr(struct hfi1_devdata *dd, struct cntr_entry *entry,
+ u64 *psval, void *context, int vl)
+{
+ u64 val;
+ u64 sval = *psval;
+
+ if (entry->flags & CNTR_DISABLED) {
+ dd_dev_err(dd, "Counter %s not enabled", entry->name);
+ return 0;
+ }
+
+ hfi1_cdbg(CNTR, "cntr: %s vl %d psval 0x%llx", entry->name, vl, *psval);
+
+ val = entry->rw_cntr(entry, context, vl, CNTR_MODE_R, 0);
+
+ /* If its a synthetic counter there is more work we need to do */
+ if (entry->flags & CNTR_SYNTH) {
+ if (sval == CNTR_MAX) {
+ /* No need to read already saturated */
+ return CNTR_MAX;
+ }
+
+ if (entry->flags & CNTR_32BIT) {
+ /* 32bit counters can wrap multiple times */
+ u64 upper = sval >> 32;
+ u64 lower = (sval << 32) >> 32;
+
+ if (lower > val) { /* hw wrapped */
+ if (upper == CNTR_32BIT_MAX)
+ val = CNTR_MAX;
+ else
+ upper++;
+ }
+
+ if (val != CNTR_MAX)
+ val = (upper << 32) | val;
+
+ } else {
+ /* If we rolled we are saturated */
+ if ((val < sval) || (val > CNTR_MAX))
+ val = CNTR_MAX;
+ }
+ }
+
+ *psval = val;
+
+ hfi1_cdbg(CNTR, "\tNew val=0x%llx", val);
+
+ return val;
+}
+
+static u64 write_dev_port_cntr(struct hfi1_devdata *dd,
+ struct cntr_entry *entry,
+ u64 *psval, void *context, int vl, u64 data)
+{
+ u64 val;
+
+ if (entry->flags & CNTR_DISABLED) {
+ dd_dev_err(dd, "Counter %s not enabled", entry->name);
+ return 0;
+ }
+
+ hfi1_cdbg(CNTR, "cntr: %s vl %d psval 0x%llx", entry->name, vl, *psval);
+
+ if (entry->flags & CNTR_SYNTH) {
+ *psval = data;
+ if (entry->flags & CNTR_32BIT) {
+ val = entry->rw_cntr(entry, context, vl, CNTR_MODE_W,
+ (data << 32) >> 32);
+ val = data; /* return the full 64bit value */
+ } else {
+ val = entry->rw_cntr(entry, context, vl, CNTR_MODE_W,
+ data);
+ }
+ } else {
+ val = entry->rw_cntr(entry, context, vl, CNTR_MODE_W, data);
+ }
+
+ *psval = val;
+
+ hfi1_cdbg(CNTR, "\tNew val=0x%llx", val);
+
+ return val;
+}
+
+u64 read_dev_cntr(struct hfi1_devdata *dd, int index, int vl)
+{
+ struct cntr_entry *entry;
+ u64 *sval;
+
+ entry = &dev_cntrs[index];
+ sval = dd->scntrs + entry->offset;
+
+ if (vl != CNTR_INVALID_VL)
+ sval += vl;
+
+ return read_dev_port_cntr(dd, entry, sval, dd, vl);
+}
+
+u64 write_dev_cntr(struct hfi1_devdata *dd, int index, int vl, u64 data)
+{
+ struct cntr_entry *entry;
+ u64 *sval;
+
+ entry = &dev_cntrs[index];
+ sval = dd->scntrs + entry->offset;
+
+ if (vl != CNTR_INVALID_VL)
+ sval += vl;
+
+ return write_dev_port_cntr(dd, entry, sval, dd, vl, data);
+}
+
+u64 read_port_cntr(struct hfi1_pportdata *ppd, int index, int vl)
+{
+ struct cntr_entry *entry;
+ u64 *sval;
+
+ entry = &port_cntrs[index];
+ sval = ppd->scntrs + entry->offset;
+
+ if (vl != CNTR_INVALID_VL)
+ sval += vl;
+
+ if ((index >= C_RCV_HDR_OVF_FIRST + ppd->dd->num_rcv_contexts) &&
+ (index <= C_RCV_HDR_OVF_LAST)) {
+ /* We do not want to bother for disabled contexts */
+ return 0;
+ }
+
+ return read_dev_port_cntr(ppd->dd, entry, sval, ppd, vl);
+}
+
+u64 write_port_cntr(struct hfi1_pportdata *ppd, int index, int vl, u64 data)
+{
+ struct cntr_entry *entry;
+ u64 *sval;
+
+ entry = &port_cntrs[index];
+ sval = ppd->scntrs + entry->offset;
+
+ if (vl != CNTR_INVALID_VL)
+ sval += vl;
+
+ if ((index >= C_RCV_HDR_OVF_FIRST + ppd->dd->num_rcv_contexts) &&
+ (index <= C_RCV_HDR_OVF_LAST)) {
+ /* We do not want to bother for disabled contexts */
+ return 0;
+ }
+
+ return write_dev_port_cntr(ppd->dd, entry, sval, ppd, vl, data);
+}
+
+static void update_synth_timer(unsigned long opaque)
+{
+ u64 cur_tx;
+ u64 cur_rx;
+ u64 total_flits;
+ u8 update = 0;
+ int i, j, vl;
+ struct hfi1_pportdata *ppd;
+ struct cntr_entry *entry;
+
+ struct hfi1_devdata *dd = (struct hfi1_devdata *)opaque;
+
+ /*
+ * Rather than keep beating on the CSRs pick a minimal set that we can
+ * check to watch for potential roll over. We can do this by looking at
+ * the number of flits sent/recv. If the total flits exceeds 32bits then
+ * we have to iterate all the counters and update.
+ */
+ entry = &dev_cntrs[C_DC_RCV_FLITS];
+ cur_rx = entry->rw_cntr(entry, dd, CNTR_INVALID_VL, CNTR_MODE_R, 0);
+
+ entry = &dev_cntrs[C_DC_XMIT_FLITS];
+ cur_tx = entry->rw_cntr(entry, dd, CNTR_INVALID_VL, CNTR_MODE_R, 0);
+
+ hfi1_cdbg(
+ CNTR,
+ "[%d] curr tx=0x%llx rx=0x%llx :: last tx=0x%llx rx=0x%llx\n",
+ dd->unit, cur_tx, cur_rx, dd->last_tx, dd->last_rx);
+
+ if ((cur_tx < dd->last_tx) || (cur_rx < dd->last_rx)) {
+ /*
+ * May not be strictly necessary to update but it won't hurt and
+ * simplifies the logic here.
+ */
+ update = 1;
+ hfi1_cdbg(CNTR, "[%d] Tripwire counter rolled, updating",
+ dd->unit);
+ } else {
+ total_flits = (cur_tx - dd->last_tx) + (cur_rx - dd->last_rx);
+ hfi1_cdbg(CNTR,
+ "[%d] total flits 0x%llx limit 0x%llx\n", dd->unit,
+ total_flits, (u64)CNTR_32BIT_MAX);
+ if (total_flits >= CNTR_32BIT_MAX) {
+ hfi1_cdbg(CNTR, "[%d] 32bit limit hit, updating",
+ dd->unit);
+ update = 1;
+ }
+ }
+
+ if (update) {
+ hfi1_cdbg(CNTR, "[%d] Updating dd and ppd counters", dd->unit);
+ for (i = 0; i < DEV_CNTR_LAST; i++) {
+ entry = &dev_cntrs[i];
+ if (entry->flags & CNTR_VL) {
+ for (vl = 0; vl < C_VL_COUNT; vl++)
+ read_dev_cntr(dd, i, vl);
+ } else {
+ read_dev_cntr(dd, i, CNTR_INVALID_VL);
+ }
+ }
+ ppd = (struct hfi1_pportdata *)(dd + 1);
+ for (i = 0; i < dd->num_pports; i++, ppd++) {
+ for (j = 0; j < PORT_CNTR_LAST; j++) {
+ entry = &port_cntrs[j];
+ if (entry->flags & CNTR_VL) {
+ for (vl = 0; vl < C_VL_COUNT; vl++)
+ read_port_cntr(ppd, j, vl);
+ } else {
+ read_port_cntr(ppd, j, CNTR_INVALID_VL);
+ }
+ }
+ }
+
+ /*
+ * We want the value in the register. The goal is to keep track
+ * of the number of "ticks" not the counter value. In other
+ * words if the register rolls we want to notice it and go ahead
+ * and force an update.
+ */
+ entry = &dev_cntrs[C_DC_XMIT_FLITS];
+ dd->last_tx = entry->rw_cntr(entry, dd, CNTR_INVALID_VL,
+ CNTR_MODE_R, 0);
+
+ entry = &dev_cntrs[C_DC_RCV_FLITS];
+ dd->last_rx = entry->rw_cntr(entry, dd, CNTR_INVALID_VL,
+ CNTR_MODE_R, 0);
+
+ hfi1_cdbg(CNTR, "[%d] setting last tx/rx to 0x%llx 0x%llx",
+ dd->unit, dd->last_tx, dd->last_rx);
+
+ } else {
+ hfi1_cdbg(CNTR, "[%d] No update necessary", dd->unit);
+ }
+
+mod_timer(&dd->synth_stats_timer, jiffies + HZ * SYNTH_CNT_TIME);
+}
+
+#define C_MAX_NAME 13 /* 12 chars + one for /0 */
+static int init_cntrs(struct hfi1_devdata *dd)
+{
+ int i, rcv_ctxts, index, j;
+ size_t sz;
+ char *p;
+ char name[C_MAX_NAME];
+ struct hfi1_pportdata *ppd;
+
+ /* set up the stats timer; the add_timer is done at the end */
+ init_timer(&dd->synth_stats_timer);
+ dd->synth_stats_timer.function = update_synth_timer;
+ dd->synth_stats_timer.data = (unsigned long) dd;
+
+ /***********************/
+ /* per device counters */
+ /***********************/
+
+ /* size names and determine how many we have*/
+ dd->ndevcntrs = 0;
+ sz = 0;
+ index = 0;
+
+ for (i = 0; i < DEV_CNTR_LAST; i++) {
+ hfi1_dbg_early("Init cntr %s\n", dev_cntrs[i].name);
+ if (dev_cntrs[i].flags & CNTR_DISABLED) {
+ hfi1_dbg_early("\tSkipping %s\n", dev_cntrs[i].name);
+ continue;
+ }
+
+ if (dev_cntrs[i].flags & CNTR_VL) {
+ hfi1_dbg_early("\tProcessing VL cntr\n");
+ dev_cntrs[i].offset = index;
+ for (j = 0; j < C_VL_COUNT; j++) {
+ memset(name, '\0', C_MAX_NAME);
+ snprintf(name, C_MAX_NAME, "%s%d",
+ dev_cntrs[i].name,
+ vl_from_idx(j));
+ sz += strlen(name);
+ sz++;
+ hfi1_dbg_early("\t\t%s\n", name);
+ dd->ndevcntrs++;
+ index++;
+ }
+ } else {
+ /* +1 for newline */
+ sz += strlen(dev_cntrs[i].name) + 1;
+ dd->ndevcntrs++;
+ dev_cntrs[i].offset = index;
+ index++;
+ hfi1_dbg_early("\tAdding %s\n", dev_cntrs[i].name);
+ }
+ }
+
+ /* allocate space for the counter values */
+ dd->cntrs = kcalloc(index, sizeof(u64), GFP_KERNEL);
+ if (!dd->cntrs)
+ goto bail;
+
+ dd->scntrs = kcalloc(index, sizeof(u64), GFP_KERNEL);
+ if (!dd->scntrs)
+ goto bail;
+
+
+ /* allocate space for the counter names */
+ dd->cntrnameslen = sz;
+ dd->cntrnames = kmalloc(sz, GFP_KERNEL);
+ if (!dd->cntrnames)
+ goto bail;
+
+ /* fill in the names */
+ for (p = dd->cntrnames, i = 0, index = 0; i < DEV_CNTR_LAST; i++) {
+ if (dev_cntrs[i].flags & CNTR_DISABLED) {
+ /* Nothing */
+ } else {
+ if (dev_cntrs[i].flags & CNTR_VL) {
+ for (j = 0; j < C_VL_COUNT; j++) {
+ memset(name, '\0', C_MAX_NAME);
+ snprintf(name, C_MAX_NAME, "%s%d",
+ dev_cntrs[i].name,
+ vl_from_idx(j));
+ memcpy(p, name, strlen(name));
+ p += strlen(name);
+ *p++ = '\n';
+ }
+ } else {
+ memcpy(p, dev_cntrs[i].name,
+ strlen(dev_cntrs[i].name));
+ p += strlen(dev_cntrs[i].name);
+ *p++ = '\n';
+ }
+ index++;
+ }
+ }
+
+ /*********************/
+ /* per port counters */
+ /*********************/
+
+ /*
+ * Go through the counters for the overflows and disable the ones we
+ * don't need. This varies based on platform so we need to do it
+ * dynamically here.
+ */
+ rcv_ctxts = dd->num_rcv_contexts;
+ for (i = C_RCV_HDR_OVF_FIRST + rcv_ctxts;
+ i <= C_RCV_HDR_OVF_LAST; i++) {
+ port_cntrs[i].flags |= CNTR_DISABLED;
+ }
+
+ /* size port counter names and determine how many we have*/
+ sz = 0;
+ dd->nportcntrs = 0;
+ for (i = 0; i < PORT_CNTR_LAST; i++) {
+ hfi1_dbg_early("Init pcntr %s\n", port_cntrs[i].name);
+ if (port_cntrs[i].flags & CNTR_DISABLED) {
+ hfi1_dbg_early("\tSkipping %s\n", port_cntrs[i].name);
+ continue;
+ }
+
+ if (port_cntrs[i].flags & CNTR_VL) {
+ hfi1_dbg_early("\tProcessing VL cntr\n");
+ port_cntrs[i].offset = dd->nportcntrs;
+ for (j = 0; j < C_VL_COUNT; j++) {
+ memset(name, '\0', C_MAX_NAME);
+ snprintf(name, C_MAX_NAME, "%s%d",
+ port_cntrs[i].name,
+ vl_from_idx(j));
+ sz += strlen(name);
+ sz++;
+ hfi1_dbg_early("\t\t%s\n", name);
+ dd->nportcntrs++;
+ }
+ } else {
+ /* +1 for newline */
+ sz += strlen(port_cntrs[i].name) + 1;
+ port_cntrs[i].offset = dd->nportcntrs;
+ dd->nportcntrs++;
+ hfi1_dbg_early("\tAdding %s\n", port_cntrs[i].name);
+ }
+ }
+
+ /* allocate space for the counter names */
+ dd->portcntrnameslen = sz;
+ dd->portcntrnames = kmalloc(sz, GFP_KERNEL);
+ if (!dd->portcntrnames)
+ goto bail;
+
+ /* fill in port cntr names */
+ for (p = dd->portcntrnames, i = 0; i < PORT_CNTR_LAST; i++) {
+ if (port_cntrs[i].flags & CNTR_DISABLED)
+ continue;
+
+ if (port_cntrs[i].flags & CNTR_VL) {
+ for (j = 0; j < C_VL_COUNT; j++) {
+ memset(name, '\0', C_MAX_NAME);
+ snprintf(name, C_MAX_NAME, "%s%d",
+ port_cntrs[i].name,
+ vl_from_idx(j));
+ memcpy(p, name, strlen(name));
+ p += strlen(name);
+ *p++ = '\n';
+ }
+ } else {
+ memcpy(p, port_cntrs[i].name,
+ strlen(port_cntrs[i].name));
+ p += strlen(port_cntrs[i].name);
+ *p++ = '\n';
+ }
+ }
+
+ /* allocate per port storage for counter values */
+ ppd = (struct hfi1_pportdata *)(dd + 1);
+ for (i = 0; i < dd->num_pports; i++, ppd++) {
+ ppd->cntrs = kcalloc(dd->nportcntrs, sizeof(u64), GFP_KERNEL);
+ if (!ppd->cntrs)
+ goto bail;
+
+ ppd->scntrs = kcalloc(dd->nportcntrs, sizeof(u64), GFP_KERNEL);
+ if (!ppd->scntrs)
+ goto bail;
+ }
+
+ /* CPU counters need to be allocated and zeroed */
+ if (init_cpu_counters(dd))
+ goto bail;
+
+ mod_timer(&dd->synth_stats_timer, jiffies + HZ * SYNTH_CNT_TIME);
+ return 0;
+bail:
+ free_cntrs(dd);
+ return -ENOMEM;
+}
+
+
+static u32 chip_to_opa_lstate(struct hfi1_devdata *dd, u32 chip_lstate)
+{
+ switch (chip_lstate) {
+ default:
+ dd_dev_err(dd,
+ "Unknown logical state 0x%x, reporting IB_PORT_DOWN\n",
+ chip_lstate);
+ /* fall through */
+ case LSTATE_DOWN:
+ return IB_PORT_DOWN;
+ case LSTATE_INIT:
+ return IB_PORT_INIT;
+ case LSTATE_ARMED:
+ return IB_PORT_ARMED;
+ case LSTATE_ACTIVE:
+ return IB_PORT_ACTIVE;
+ }
+}
+
+u32 chip_to_opa_pstate(struct hfi1_devdata *dd, u32 chip_pstate)
+{
+ /* look at the HFI meta-states only */
+ switch (chip_pstate & 0xf0) {
+ default:
+ dd_dev_err(dd, "Unexpected chip physical state of 0x%x\n",
+ chip_pstate);
+ /* fall through */
+ case PLS_DISABLED:
+ return IB_PORTPHYSSTATE_DISABLED;
+ case PLS_OFFLINE:
+ return OPA_PORTPHYSSTATE_OFFLINE;
+ case PLS_POLLING:
+ return IB_PORTPHYSSTATE_POLLING;
+ case PLS_CONFIGPHY:
+ return IB_PORTPHYSSTATE_TRAINING;
+ case PLS_LINKUP:
+ return IB_PORTPHYSSTATE_LINKUP;
+ case PLS_PHYTEST:
+ return IB_PORTPHYSSTATE_PHY_TEST;
+ }
+}
+
+/* return the OPA port logical state name */
+const char *opa_lstate_name(u32 lstate)
+{
+ static const char * const port_logical_names[] = {
+ "PORT_NOP",
+ "PORT_DOWN",
+ "PORT_INIT",
+ "PORT_ARMED",
+ "PORT_ACTIVE",
+ "PORT_ACTIVE_DEFER",
+ };
+ if (lstate < ARRAY_SIZE(port_logical_names))
+ return port_logical_names[lstate];
+ return "unknown";
+}
+
+/* return the OPA port physical state name */
+const char *opa_pstate_name(u32 pstate)
+{
+ static const char * const port_physical_names[] = {
+ "PHYS_NOP",
+ "reserved1",
+ "PHYS_POLL",
+ "PHYS_DISABLED",
+ "PHYS_TRAINING",
+ "PHYS_LINKUP",
+ "PHYS_LINK_ERR_RECOVER",
+ "PHYS_PHY_TEST",
+ "reserved8",
+ "PHYS_OFFLINE",
+ "PHYS_GANGED",
+ "PHYS_TEST",
+ };
+ if (pstate < ARRAY_SIZE(port_physical_names))
+ return port_physical_names[pstate];
+ return "unknown";
+}
+
+/*
+ * Read the hardware link state and set the driver's cached value of it.
+ * Return the (new) current value.
+ */
+u32 get_logical_state(struct hfi1_pportdata *ppd)
+{
+ u32 new_state;
+
+ new_state = chip_to_opa_lstate(ppd->dd, read_logical_state(ppd->dd));
+ if (new_state != ppd->lstate) {
+ dd_dev_info(ppd->dd, "logical state changed to %s (0x%x)\n",
+ opa_lstate_name(new_state), new_state);
+ ppd->lstate = new_state;
+ }
+ /*
+ * Set port status flags in the page mapped into userspace
+ * memory. Do it here to ensure a reliable state - this is
+ * the only function called by all state handling code.
+ * Always set the flags due to the fact that the cache value
+ * might have been changed explicitly outside of this
+ * function.
+ */
+ if (ppd->statusp) {
+ switch (ppd->lstate) {
+ case IB_PORT_DOWN:
+ case IB_PORT_INIT:
+ *ppd->statusp &= ~(HFI1_STATUS_IB_CONF |
+ HFI1_STATUS_IB_READY);
+ break;
+ case IB_PORT_ARMED:
+ *ppd->statusp |= HFI1_STATUS_IB_CONF;
+ break;
+ case IB_PORT_ACTIVE:
+ *ppd->statusp |= HFI1_STATUS_IB_READY;
+ break;
+ }
+ }
+ return ppd->lstate;
+}
+
+/**
+ * wait_logical_linkstate - wait for an IB link state change to occur
+ * @ppd: port device
+ * @state: the state to wait for
+ * @msecs: the number of milliseconds to wait
+ *
+ * Wait up to msecs milliseconds for IB link state change to occur.
+ * For now, take the easy polling route.
+ * Returns 0 if state reached, otherwise -ETIMEDOUT.
+ */
+static int wait_logical_linkstate(struct hfi1_pportdata *ppd, u32 state,
+ int msecs)
+{
+ unsigned long timeout;
+
+ timeout = jiffies + msecs_to_jiffies(msecs);
+ while (1) {
+ if (get_logical_state(ppd) == state)
+ return 0;
+ if (time_after(jiffies, timeout))
+ break;
+ msleep(20);
+ }
+ dd_dev_err(ppd->dd, "timeout waiting for link state 0x%x\n", state);
+
+ return -ETIMEDOUT;
+}
+
+u8 hfi1_ibphys_portstate(struct hfi1_pportdata *ppd)
+{
+ static u32 remembered_state = 0xff;
+ u32 pstate;
+ u32 ib_pstate;
+
+ pstate = read_physical_state(ppd->dd);
+ ib_pstate = chip_to_opa_pstate(ppd->dd, pstate);
+ if (remembered_state != ib_pstate) {
+ dd_dev_info(ppd->dd,
+ "%s: physical state changed to %s (0x%x), phy 0x%x\n",
+ __func__, opa_pstate_name(ib_pstate), ib_pstate,
+ pstate);
+ remembered_state = ib_pstate;
+ }
+ return ib_pstate;
+}
+
+/*
+ * Read/modify/write ASIC_QSFP register bits as selected by mask
+ * data: 0 or 1 in the positions depending on what needs to be written
+ * dir: 0 for read, 1 for write
+ * mask: select by setting
+ * I2CCLK (bit 0)
+ * I2CDATA (bit 1)
+ */
+u64 hfi1_gpio_mod(struct hfi1_devdata *dd, u32 target, u32 data, u32 dir,
+ u32 mask)
+{
+ u64 qsfp_oe, target_oe;
+
+ target_oe = target ? ASIC_QSFP2_OE : ASIC_QSFP1_OE;
+ if (mask) {
+ /* We are writing register bits, so lock access */
+ dir &= mask;
+ data &= mask;
+
+ qsfp_oe = read_csr(dd, target_oe);
+ qsfp_oe = (qsfp_oe & ~(u64)mask) | (u64)dir;
+ write_csr(dd, target_oe, qsfp_oe);
+ }
+ /* We are exclusively reading bits here, but it is unlikely
+ * we'll get valid data when we set the direction of the pin
+ * in the same call, so read should call this function again
+ * to get valid data
+ */
+ return read_csr(dd, target ? ASIC_QSFP2_IN : ASIC_QSFP1_IN);
+}
+
+#define CLEAR_STATIC_RATE_CONTROL_SMASK(r) \
+(r &= ~SEND_CTXT_CHECK_ENABLE_DISALLOW_PBC_STATIC_RATE_CONTROL_SMASK)
+
+#define SET_STATIC_RATE_CONTROL_SMASK(r) \
+(r |= SEND_CTXT_CHECK_ENABLE_DISALLOW_PBC_STATIC_RATE_CONTROL_SMASK)
+
+int hfi1_init_ctxt(struct send_context *sc)
+{
+ if (sc != NULL) {
+ struct hfi1_devdata *dd = sc->dd;
+ u64 reg;
+ u8 set = (sc->type == SC_USER ?
+ HFI1_CAP_IS_USET(STATIC_RATE_CTRL) :
+ HFI1_CAP_IS_KSET(STATIC_RATE_CTRL));
+ reg = read_kctxt_csr(dd, sc->hw_context,
+ SEND_CTXT_CHECK_ENABLE);
+ if (set)
+ CLEAR_STATIC_RATE_CONTROL_SMASK(reg);
+ else
+ SET_STATIC_RATE_CONTROL_SMASK(reg);
+ write_kctxt_csr(dd, sc->hw_context,
+ SEND_CTXT_CHECK_ENABLE, reg);
+ }
+ return 0;
+}
+
+int hfi1_tempsense_rd(struct hfi1_devdata *dd, struct hfi1_temp *temp)
+{
+ int ret = 0;
+ u64 reg;
+
+ if (dd->icode != ICODE_RTL_SILICON) {
+ if (HFI1_CAP_IS_KSET(PRINT_UNIMPL))
+ dd_dev_info(dd, "%s: tempsense not supported by HW\n",
+ __func__);
+ return -EINVAL;
+ }
+ reg = read_csr(dd, ASIC_STS_THERM);
+ temp->curr = ((reg >> ASIC_STS_THERM_CURR_TEMP_SHIFT) &
+ ASIC_STS_THERM_CURR_TEMP_MASK);
+ temp->lo_lim = ((reg >> ASIC_STS_THERM_LO_TEMP_SHIFT) &
+ ASIC_STS_THERM_LO_TEMP_MASK);
+ temp->hi_lim = ((reg >> ASIC_STS_THERM_HI_TEMP_SHIFT) &
+ ASIC_STS_THERM_HI_TEMP_MASK);
+ temp->crit_lim = ((reg >> ASIC_STS_THERM_CRIT_TEMP_SHIFT) &
+ ASIC_STS_THERM_CRIT_TEMP_MASK);
+ /* triggers is a 3-bit value - 1 bit per trigger. */
+ temp->triggers = (u8)((reg >> ASIC_STS_THERM_LOW_SHIFT) & 0x7);
+
+ return ret;
+}
+
+/* ========================================================================= */
+
+/*
+ * Enable/disable chip from delivering interrupts.
+ */
+void set_intr_state(struct hfi1_devdata *dd, u32 enable)
+{
+ int i;
+
+ /*
+ * In HFI, the mask needs to be 1 to allow interrupts.
+ */
+ if (enable) {
+ u64 cce_int_mask;
+ const int qsfp1_int_smask = QSFP1_INT % 64;
+ const int qsfp2_int_smask = QSFP2_INT % 64;
+
+ /* enable all interrupts */
+ for (i = 0; i < CCE_NUM_INT_CSRS; i++)
+ write_csr(dd, CCE_INT_MASK + (8*i), ~(u64)0);
+
+ /*
+ * disable QSFP1 interrupts for HFI1, QSFP2 interrupts for HFI0
+ * Qsfp1Int and Qsfp2Int are adjacent bits in the same CSR,
+ * therefore just one of QSFP1_INT/QSFP2_INT can be used to find
+ * the index of the appropriate CSR in the CCEIntMask CSR array
+ */
+ cce_int_mask = read_csr(dd, CCE_INT_MASK +
+ (8*(QSFP1_INT/64)));
+ if (dd->hfi1_id) {
+ cce_int_mask &= ~((u64)1 << qsfp1_int_smask);
+ write_csr(dd, CCE_INT_MASK + (8*(QSFP1_INT/64)),
+ cce_int_mask);
+ } else {
+ cce_int_mask &= ~((u64)1 << qsfp2_int_smask);
+ write_csr(dd, CCE_INT_MASK + (8*(QSFP2_INT/64)),
+ cce_int_mask);
+ }
+ } else {
+ for (i = 0; i < CCE_NUM_INT_CSRS; i++)
+ write_csr(dd, CCE_INT_MASK + (8*i), 0ull);
+ }
+}
+
+/*
+ * Clear all interrupt sources on the chip.
+ */
+static void clear_all_interrupts(struct hfi1_devdata *dd)
+{
+ int i;
+
+ for (i = 0; i < CCE_NUM_INT_CSRS; i++)
+ write_csr(dd, CCE_INT_CLEAR + (8*i), ~(u64)0);
+
+ write_csr(dd, CCE_ERR_CLEAR, ~(u64)0);
+ write_csr(dd, MISC_ERR_CLEAR, ~(u64)0);
+ write_csr(dd, RCV_ERR_CLEAR, ~(u64)0);
+ write_csr(dd, SEND_ERR_CLEAR, ~(u64)0);
+ write_csr(dd, SEND_PIO_ERR_CLEAR, ~(u64)0);
+ write_csr(dd, SEND_DMA_ERR_CLEAR, ~(u64)0);
+ write_csr(dd, SEND_EGRESS_ERR_CLEAR, ~(u64)0);
+ for (i = 0; i < dd->chip_send_contexts; i++)
+ write_kctxt_csr(dd, i, SEND_CTXT_ERR_CLEAR, ~(u64)0);
+ for (i = 0; i < dd->chip_sdma_engines; i++)
+ write_kctxt_csr(dd, i, SEND_DMA_ENG_ERR_CLEAR, ~(u64)0);
+
+ write_csr(dd, DCC_ERR_FLG_CLR, ~(u64)0);
+ write_csr(dd, DC_LCB_ERR_CLR, ~(u64)0);
+ write_csr(dd, DC_DC8051_ERR_CLR, ~(u64)0);
+}
+
+/* Move to pcie.c? */
+static void disable_intx(struct pci_dev *pdev)
+{
+ pci_intx(pdev, 0);
+}
+
+static void clean_up_interrupts(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /* remove irqs - must happen before disabling/turning off */
+ if (dd->num_msix_entries) {
+ /* MSI-X */
+ struct hfi1_msix_entry *me = dd->msix_entries;
+
+ for (i = 0; i < dd->num_msix_entries; i++, me++) {
+ if (me->arg == NULL) /* => no irq, no affinity */
+ break;
+ irq_set_affinity_hint(dd->msix_entries[i].msix.vector,
+ NULL);
+ free_irq(me->msix.vector, me->arg);
+ }
+ } else {
+ /* INTx */
+ if (dd->requested_intx_irq) {
+ free_irq(dd->pcidev->irq, dd);
+ dd->requested_intx_irq = 0;
+ }
+ }
+
+ /* turn off interrupts */
+ if (dd->num_msix_entries) {
+ /* MSI-X */
+ hfi1_nomsix(dd);
+ } else {
+ /* INTx */
+ disable_intx(dd->pcidev);
+ }
+
+ /* clean structures */
+ for (i = 0; i < dd->num_msix_entries; i++)
+ free_cpumask_var(dd->msix_entries[i].mask);
+ kfree(dd->msix_entries);
+ dd->msix_entries = NULL;
+ dd->num_msix_entries = 0;
+}
+
+/*
+ * Remap the interrupt source from the general handler to the given MSI-X
+ * interrupt.
+ */
+static void remap_intr(struct hfi1_devdata *dd, int isrc, int msix_intr)
+{
+ u64 reg;
+ int m, n;
+
+ /* clear from the handled mask of the general interrupt */
+ m = isrc / 64;
+ n = isrc % 64;
+ dd->gi_mask[m] &= ~((u64)1 << n);
+
+ /* direct the chip source to the given MSI-X interrupt */
+ m = isrc / 8;
+ n = isrc % 8;
+ reg = read_csr(dd, CCE_INT_MAP + (8*m));
+ reg &= ~((u64)0xff << (8*n));
+ reg |= ((u64)msix_intr & 0xff) << (8*n);
+ write_csr(dd, CCE_INT_MAP + (8*m), reg);
+}
+
+static void remap_sdma_interrupts(struct hfi1_devdata *dd,
+ int engine, int msix_intr)
+{
+ /*
+ * SDMA engine interrupt sources grouped by type, rather than
+ * engine. Per-engine interrupts are as follows:
+ * SDMA
+ * SDMAProgress
+ * SDMAIdle
+ */
+ remap_intr(dd, IS_SDMA_START + 0*TXE_NUM_SDMA_ENGINES + engine,
+ msix_intr);
+ remap_intr(dd, IS_SDMA_START + 1*TXE_NUM_SDMA_ENGINES + engine,
+ msix_intr);
+ remap_intr(dd, IS_SDMA_START + 2*TXE_NUM_SDMA_ENGINES + engine,
+ msix_intr);
+}
+
+static void remap_receive_available_interrupt(struct hfi1_devdata *dd,
+ int rx, int msix_intr)
+{
+ remap_intr(dd, IS_RCVAVAIL_START + rx, msix_intr);
+}
+
+static int request_intx_irq(struct hfi1_devdata *dd)
+{
+ int ret;
+
+ snprintf(dd->intx_name, sizeof(dd->intx_name), DRIVER_NAME"_%d",
+ dd->unit);
+ ret = request_irq(dd->pcidev->irq, general_interrupt,
+ IRQF_SHARED, dd->intx_name, dd);
+ if (ret)
+ dd_dev_err(dd, "unable to request INTx interrupt, err %d\n",
+ ret);
+ else
+ dd->requested_intx_irq = 1;
+ return ret;
+}
+
+static int request_msix_irqs(struct hfi1_devdata *dd)
+{
+ const struct cpumask *local_mask;
+ cpumask_var_t def, rcv;
+ bool def_ret, rcv_ret;
+ int first_general, last_general;
+ int first_sdma, last_sdma;
+ int first_rx, last_rx;
+ int first_cpu, restart_cpu, curr_cpu;
+ int rcv_cpu, sdma_cpu;
+ int i, ret = 0, possible;
+ int ht;
+
+ /* calculate the ranges we are going to use */
+ first_general = 0;
+ first_sdma = last_general = first_general + 1;
+ first_rx = last_sdma = first_sdma + dd->num_sdma;
+ last_rx = first_rx + dd->n_krcv_queues;
+
+ /*
+ * Interrupt affinity.
+ *
+ * non-rcv avail gets a default mask that
+ * starts as possible cpus with threads reset
+ * and each rcv avail reset.
+ *
+ * rcv avail gets node relative 1 wrapping back
+ * to the node relative 1 as necessary.
+ *
+ */
+ local_mask = cpumask_of_pcibus(dd->pcidev->bus);
+ /* if first cpu is invalid, use NUMA 0 */
+ if (cpumask_first(local_mask) >= nr_cpu_ids)
+ local_mask = topology_core_cpumask(0);
+
+ def_ret = zalloc_cpumask_var(&def, GFP_KERNEL);
+ rcv_ret = zalloc_cpumask_var(&rcv, GFP_KERNEL);
+ if (!def_ret || !rcv_ret)
+ goto bail;
+ /* use local mask as default */
+ cpumask_copy(def, local_mask);
+ possible = cpumask_weight(def);
+ /* disarm threads from default */
+ ht = cpumask_weight(
+ topology_sibling_cpumask(cpumask_first(local_mask)));
+ for (i = possible/ht; i < possible; i++)
+ cpumask_clear_cpu(i, def);
+ /* reset possible */
+ possible = cpumask_weight(def);
+ /* def now has full cores on chosen node*/
+ first_cpu = cpumask_first(def);
+ if (nr_cpu_ids >= first_cpu)
+ first_cpu++;
+ restart_cpu = first_cpu;
+ curr_cpu = restart_cpu;
+
+ for (i = first_cpu; i < dd->n_krcv_queues + first_cpu; i++) {
+ cpumask_clear_cpu(curr_cpu, def);
+ cpumask_set_cpu(curr_cpu, rcv);
+ if (curr_cpu >= possible)
+ curr_cpu = restart_cpu;
+ else
+ curr_cpu++;
+ }
+ /* def mask has non-rcv, rcv has recv mask */
+ rcv_cpu = cpumask_first(rcv);
+ sdma_cpu = cpumask_first(def);
+
+ /*
+ * Sanity check - the code expects all SDMA chip source
+ * interrupts to be in the same CSR, starting at bit 0. Verify
+ * that this is true by checking the bit location of the start.
+ */
+ BUILD_BUG_ON(IS_SDMA_START % 64);
+
+ for (i = 0; i < dd->num_msix_entries; i++) {
+ struct hfi1_msix_entry *me = &dd->msix_entries[i];
+ const char *err_info;
+ irq_handler_t handler;
+ void *arg;
+ int idx;
+ struct hfi1_ctxtdata *rcd = NULL;
+ struct sdma_engine *sde = NULL;
+
+ /* obtain the arguments to request_irq */
+ if (first_general <= i && i < last_general) {
+ idx = i - first_general;
+ handler = general_interrupt;
+ arg = dd;
+ snprintf(me->name, sizeof(me->name),
+ DRIVER_NAME"_%d", dd->unit);
+ err_info = "general";
+ } else if (first_sdma <= i && i < last_sdma) {
+ idx = i - first_sdma;
+ sde = &dd->per_sdma[idx];
+ handler = sdma_interrupt;
+ arg = sde;
+ snprintf(me->name, sizeof(me->name),
+ DRIVER_NAME"_%d sdma%d", dd->unit, idx);
+ err_info = "sdma";
+ remap_sdma_interrupts(dd, idx, i);
+ } else if (first_rx <= i && i < last_rx) {
+ idx = i - first_rx;
+ rcd = dd->rcd[idx];
+ /* no interrupt if no rcd */
+ if (!rcd)
+ continue;
+ /*
+ * Set the interrupt register and mask for this
+ * context's interrupt.
+ */
+ rcd->ireg = (IS_RCVAVAIL_START+idx) / 64;
+ rcd->imask = ((u64)1) <<
+ ((IS_RCVAVAIL_START+idx) % 64);
+ handler = receive_context_interrupt;
+ arg = rcd;
+ snprintf(me->name, sizeof(me->name),
+ DRIVER_NAME"_%d kctxt%d", dd->unit, idx);
+ err_info = "receive context";
+ remap_receive_available_interrupt(dd, idx, i);
+ } else {
+ /* not in our expected range - complain, then
+ ignore it */
+ dd_dev_err(dd,
+ "Unexpected extra MSI-X interrupt %d\n", i);
+ continue;
+ }
+ /* no argument, no interrupt */
+ if (arg == NULL)
+ continue;
+ /* make sure the name is terminated */
+ me->name[sizeof(me->name)-1] = 0;
+
+ ret = request_irq(me->msix.vector, handler, 0, me->name, arg);
+ if (ret) {
+ dd_dev_err(dd,
+ "unable to allocate %s interrupt, vector %d, index %d, err %d\n",
+ err_info, me->msix.vector, idx, ret);
+ return ret;
+ }
+ /*
+ * assign arg after request_irq call, so it will be
+ * cleaned up
+ */
+ me->arg = arg;
+
+ if (!zalloc_cpumask_var(
+ &dd->msix_entries[i].mask,
+ GFP_KERNEL))
+ goto bail;
+ if (handler == sdma_interrupt) {
+ dd_dev_info(dd, "sdma engine %d cpu %d\n",
+ sde->this_idx, sdma_cpu);
+ cpumask_set_cpu(sdma_cpu, dd->msix_entries[i].mask);
+ sdma_cpu = cpumask_next(sdma_cpu, def);
+ if (sdma_cpu >= nr_cpu_ids)
+ sdma_cpu = cpumask_first(def);
+ } else if (handler == receive_context_interrupt) {
+ dd_dev_info(dd, "rcv ctxt %d cpu %d\n",
+ rcd->ctxt, rcv_cpu);
+ cpumask_set_cpu(rcv_cpu, dd->msix_entries[i].mask);
+ rcv_cpu = cpumask_next(rcv_cpu, rcv);
+ if (rcv_cpu >= nr_cpu_ids)
+ rcv_cpu = cpumask_first(rcv);
+ } else {
+ /* otherwise first def */
+ dd_dev_info(dd, "%s cpu %d\n",
+ err_info, cpumask_first(def));
+ cpumask_set_cpu(
+ cpumask_first(def), dd->msix_entries[i].mask);
+ }
+ irq_set_affinity_hint(
+ dd->msix_entries[i].msix.vector,
+ dd->msix_entries[i].mask);
+ }
+
+out:
+ free_cpumask_var(def);
+ free_cpumask_var(rcv);
+ return ret;
+bail:
+ ret = -ENOMEM;
+ goto out;
+}
+
+/*
+ * Set the general handler to accept all interrupts, remap all
+ * chip interrupts back to MSI-X 0.
+ */
+static void reset_interrupts(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /* all interrupts handled by the general handler */
+ for (i = 0; i < CCE_NUM_INT_CSRS; i++)
+ dd->gi_mask[i] = ~(u64)0;
+
+ /* all chip interrupts map to MSI-X 0 */
+ for (i = 0; i < CCE_NUM_INT_MAP_CSRS; i++)
+ write_csr(dd, CCE_INT_MAP + (8*i), 0);
+}
+
+static int set_up_interrupts(struct hfi1_devdata *dd)
+{
+ struct hfi1_msix_entry *entries;
+ u32 total, request;
+ int i, ret;
+ int single_interrupt = 0; /* we expect to have all the interrupts */
+
+ /*
+ * Interrupt count:
+ * 1 general, "slow path" interrupt (includes the SDMA engines
+ * slow source, SDMACleanupDone)
+ * N interrupts - one per used SDMA engine
+ * M interrupt - one per kernel receive context
+ */
+ total = 1 + dd->num_sdma + dd->n_krcv_queues;
+
+ entries = kcalloc(total, sizeof(*entries), GFP_KERNEL);
+ if (!entries) {
+ dd_dev_err(dd, "cannot allocate msix table\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+ /* 1-1 MSI-X entry assignment */
+ for (i = 0; i < total; i++)
+ entries[i].msix.entry = i;
+
+ /* ask for MSI-X interrupts */
+ request = total;
+ request_msix(dd, &request, entries);
+
+ if (request == 0) {
+ /* using INTx */
+ /* dd->num_msix_entries already zero */
+ kfree(entries);
+ single_interrupt = 1;
+ dd_dev_err(dd, "MSI-X failed, using INTx interrupts\n");
+ } else {
+ /* using MSI-X */
+ dd->num_msix_entries = request;
+ dd->msix_entries = entries;
+
+ if (request != total) {
+ /* using MSI-X, with reduced interrupts */
+ dd_dev_err(
+ dd,
+ "cannot handle reduced interrupt case, want %u, got %u\n",
+ total, request);
+ ret = -EINVAL;
+ goto fail;
+ }
+ dd_dev_info(dd, "%u MSI-X interrupts allocated\n", total);
+ }
+
+ /* mask all interrupts */
+ set_intr_state(dd, 0);
+ /* clear all pending interrupts */
+ clear_all_interrupts(dd);
+
+ /* reset general handler mask, chip MSI-X mappings */
+ reset_interrupts(dd);
+
+ if (single_interrupt)
+ ret = request_intx_irq(dd);
+ else
+ ret = request_msix_irqs(dd);
+ if (ret)
+ goto fail;
+
+ return 0;
+
+fail:
+ clean_up_interrupts(dd);
+ return ret;
+}
+
+/*
+ * Set up context values in dd. Sets:
+ *
+ * num_rcv_contexts - number of contexts being used
+ * n_krcv_queues - number of kernel contexts
+ * first_user_ctxt - first non-kernel context in array of contexts
+ * freectxts - number of free user contexts
+ * num_send_contexts - number of PIO send contexts being used
+ */
+static int set_up_context_variables(struct hfi1_devdata *dd)
+{
+ int num_kernel_contexts;
+ int num_user_contexts;
+ int total_contexts;
+ int ret;
+ unsigned ngroups;
+
+ /*
+ * Kernel contexts: (to be fixed later):
+ * - min or 2 or 1 context/numa
+ * - Context 0 - default/errors
+ * - Context 1 - VL15
+ */
+ if (n_krcvqs)
+ num_kernel_contexts = n_krcvqs + MIN_KERNEL_KCTXTS;
+ else
+ num_kernel_contexts = num_online_nodes();
+ num_kernel_contexts =
+ max_t(int, MIN_KERNEL_KCTXTS, num_kernel_contexts);
+ /*
+ * Every kernel receive context needs an ACK send context.
+ * one send context is allocated for each VL{0-7} and VL15
+ */
+ if (num_kernel_contexts > (dd->chip_send_contexts - num_vls - 1)) {
+ dd_dev_err(dd,
+ "Reducing # kernel rcv contexts to: %d, from %d\n",
+ (int)(dd->chip_send_contexts - num_vls - 1),
+ (int)num_kernel_contexts);
+ num_kernel_contexts = dd->chip_send_contexts - num_vls - 1;
+ }
+ /*
+ * User contexts: (to be fixed later)
+ * - set to num_rcv_contexts if non-zero
+ * - default to 1 user context per CPU
+ */
+ if (num_rcv_contexts)
+ num_user_contexts = num_rcv_contexts;
+ else
+ num_user_contexts = num_online_cpus();
+
+ total_contexts = num_kernel_contexts + num_user_contexts;
+
+ /*
+ * Adjust the counts given a global max.
+ */
+ if (total_contexts > dd->chip_rcv_contexts) {
+ dd_dev_err(dd,
+ "Reducing # user receive contexts to: %d, from %d\n",
+ (int)(dd->chip_rcv_contexts - num_kernel_contexts),
+ (int)num_user_contexts);
+ num_user_contexts = dd->chip_rcv_contexts - num_kernel_contexts;
+ /* recalculate */
+ total_contexts = num_kernel_contexts + num_user_contexts;
+ }
+
+ /* the first N are kernel contexts, the rest are user contexts */
+ dd->num_rcv_contexts = total_contexts;
+ dd->n_krcv_queues = num_kernel_contexts;
+ dd->first_user_ctxt = num_kernel_contexts;
+ dd->freectxts = num_user_contexts;
+ dd_dev_info(dd,
+ "rcv contexts: chip %d, used %d (kernel %d, user %d)\n",
+ (int)dd->chip_rcv_contexts,
+ (int)dd->num_rcv_contexts,
+ (int)dd->n_krcv_queues,
+ (int)dd->num_rcv_contexts - dd->n_krcv_queues);
+
+ /*
+ * Receive array allocation:
+ * All RcvArray entries are divided into groups of 8. This
+ * is required by the hardware and will speed up writes to
+ * consecutive entries by using write-combining of the entire
+ * cacheline.
+ *
+ * The number of groups are evenly divided among all contexts.
+ * any left over groups will be given to the first N user
+ * contexts.
+ */
+ dd->rcv_entries.group_size = RCV_INCREMENT;
+ ngroups = dd->chip_rcv_array_count / dd->rcv_entries.group_size;
+ dd->rcv_entries.ngroups = ngroups / dd->num_rcv_contexts;
+ dd->rcv_entries.nctxt_extra = ngroups -
+ (dd->num_rcv_contexts * dd->rcv_entries.ngroups);
+ dd_dev_info(dd, "RcvArray groups %u, ctxts extra %u\n",
+ dd->rcv_entries.ngroups,
+ dd->rcv_entries.nctxt_extra);
+ if (dd->rcv_entries.ngroups * dd->rcv_entries.group_size >
+ MAX_EAGER_ENTRIES * 2) {
+ dd->rcv_entries.ngroups = (MAX_EAGER_ENTRIES * 2) /
+ dd->rcv_entries.group_size;
+ dd_dev_info(dd,
+ "RcvArray group count too high, change to %u\n",
+ dd->rcv_entries.ngroups);
+ dd->rcv_entries.nctxt_extra = 0;
+ }
+ /*
+ * PIO send contexts
+ */
+ ret = init_sc_pools_and_sizes(dd);
+ if (ret >= 0) { /* success */
+ dd->num_send_contexts = ret;
+ dd_dev_info(
+ dd,
+ "send contexts: chip %d, used %d (kernel %d, ack %d, user %d)\n",
+ dd->chip_send_contexts,
+ dd->num_send_contexts,
+ dd->sc_sizes[SC_KERNEL].count,
+ dd->sc_sizes[SC_ACK].count,
+ dd->sc_sizes[SC_USER].count);
+ ret = 0; /* success */
+ }
+
+ return ret;
+}
+
+/*
+ * Set the device/port partition key table. The MAD code
+ * will ensure that, at least, the partial management
+ * partition key is present in the table.
+ */
+static void set_partition_keys(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ u64 reg = 0;
+ int i;
+
+ dd_dev_info(dd, "Setting partition keys\n");
+ for (i = 0; i < hfi1_get_npkeys(dd); i++) {
+ reg |= (ppd->pkeys[i] &
+ RCV_PARTITION_KEY_PARTITION_KEY_A_MASK) <<
+ ((i % 4) *
+ RCV_PARTITION_KEY_PARTITION_KEY_B_SHIFT);
+ /* Each register holds 4 PKey values. */
+ if ((i % 4) == 3) {
+ write_csr(dd, RCV_PARTITION_KEY +
+ ((i - 3) * 2), reg);
+ reg = 0;
+ }
+ }
+
+ /* Always enable HW pkeys check when pkeys table is set */
+ add_rcvctrl(dd, RCV_CTRL_RCV_PARTITION_KEY_ENABLE_SMASK);
+}
+
+/*
+ * These CSRs and memories are uninitialized on reset and must be
+ * written before reading to set the ECC/parity bits.
+ *
+ * NOTE: All user context CSRs that are not mmaped write-only
+ * (e.g. the TID flows) must be initialized even if the driver never
+ * reads them.
+ */
+static void write_uninitialized_csrs_and_memories(struct hfi1_devdata *dd)
+{
+ int i, j;
+
+ /* CceIntMap */
+ for (i = 0; i < CCE_NUM_INT_MAP_CSRS; i++)
+ write_csr(dd, CCE_INT_MAP+(8*i), 0);
+
+ /* SendCtxtCreditReturnAddr */
+ for (i = 0; i < dd->chip_send_contexts; i++)
+ write_kctxt_csr(dd, i, SEND_CTXT_CREDIT_RETURN_ADDR, 0);
+
+ /* PIO Send buffers */
+ /* SDMA Send buffers */
+ /* These are not normally read, and (presently) have no method
+ to be read, so are not pre-initialized */
+
+ /* RcvHdrAddr */
+ /* RcvHdrTailAddr */
+ /* RcvTidFlowTable */
+ for (i = 0; i < dd->chip_rcv_contexts; i++) {
+ write_kctxt_csr(dd, i, RCV_HDR_ADDR, 0);
+ write_kctxt_csr(dd, i, RCV_HDR_TAIL_ADDR, 0);
+ for (j = 0; j < RXE_NUM_TID_FLOWS; j++)
+ write_uctxt_csr(dd, i, RCV_TID_FLOW_TABLE+(8*j), 0);
+ }
+
+ /* RcvArray */
+ for (i = 0; i < dd->chip_rcv_array_count; i++)
+ write_csr(dd, RCV_ARRAY + (8*i),
+ RCV_ARRAY_RT_WRITE_ENABLE_SMASK);
+
+ /* RcvQPMapTable */
+ for (i = 0; i < 32; i++)
+ write_csr(dd, RCV_QP_MAP_TABLE + (8 * i), 0);
+}
+
+/*
+ * Use the ctrl_bits in CceCtrl to clear the status_bits in CceStatus.
+ */
+static void clear_cce_status(struct hfi1_devdata *dd, u64 status_bits,
+ u64 ctrl_bits)
+{
+ unsigned long timeout;
+ u64 reg;
+
+ /* is the condition present? */
+ reg = read_csr(dd, CCE_STATUS);
+ if ((reg & status_bits) == 0)
+ return;
+
+ /* clear the condition */
+ write_csr(dd, CCE_CTRL, ctrl_bits);
+
+ /* wait for the condition to clear */
+ timeout = jiffies + msecs_to_jiffies(CCE_STATUS_TIMEOUT);
+ while (1) {
+ reg = read_csr(dd, CCE_STATUS);
+ if ((reg & status_bits) == 0)
+ return;
+ if (time_after(jiffies, timeout)) {
+ dd_dev_err(dd,
+ "Timeout waiting for CceStatus to clear bits 0x%llx, remaining 0x%llx\n",
+ status_bits, reg & status_bits);
+ return;
+ }
+ udelay(1);
+ }
+}
+
+/* set CCE CSRs to chip reset defaults */
+static void reset_cce_csrs(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /* CCE_REVISION read-only */
+ /* CCE_REVISION2 read-only */
+ /* CCE_CTRL - bits clear automatically */
+ /* CCE_STATUS read-only, use CceCtrl to clear */
+ clear_cce_status(dd, ALL_FROZE, CCE_CTRL_SPC_UNFREEZE_SMASK);
+ clear_cce_status(dd, ALL_TXE_PAUSE, CCE_CTRL_TXE_RESUME_SMASK);
+ clear_cce_status(dd, ALL_RXE_PAUSE, CCE_CTRL_RXE_RESUME_SMASK);
+ for (i = 0; i < CCE_NUM_SCRATCH; i++)
+ write_csr(dd, CCE_SCRATCH + (8 * i), 0);
+ /* CCE_ERR_STATUS read-only */
+ write_csr(dd, CCE_ERR_MASK, 0);
+ write_csr(dd, CCE_ERR_CLEAR, ~0ull);
+ /* CCE_ERR_FORCE leave alone */
+ for (i = 0; i < CCE_NUM_32_BIT_COUNTERS; i++)
+ write_csr(dd, CCE_COUNTER_ARRAY32 + (8 * i), 0);
+ write_csr(dd, CCE_DC_CTRL, CCE_DC_CTRL_RESETCSR);
+ /* CCE_PCIE_CTRL leave alone */
+ for (i = 0; i < CCE_NUM_MSIX_VECTORS; i++) {
+ write_csr(dd, CCE_MSIX_TABLE_LOWER + (8 * i), 0);
+ write_csr(dd, CCE_MSIX_TABLE_UPPER + (8 * i),
+ CCE_MSIX_TABLE_UPPER_RESETCSR);
+ }
+ for (i = 0; i < CCE_NUM_MSIX_PBAS; i++) {
+ /* CCE_MSIX_PBA read-only */
+ write_csr(dd, CCE_MSIX_INT_GRANTED, ~0ull);
+ write_csr(dd, CCE_MSIX_VEC_CLR_WITHOUT_INT, ~0ull);
+ }
+ for (i = 0; i < CCE_NUM_INT_MAP_CSRS; i++)
+ write_csr(dd, CCE_INT_MAP, 0);
+ for (i = 0; i < CCE_NUM_INT_CSRS; i++) {
+ /* CCE_INT_STATUS read-only */
+ write_csr(dd, CCE_INT_MASK + (8 * i), 0);
+ write_csr(dd, CCE_INT_CLEAR + (8 * i), ~0ull);
+ /* CCE_INT_FORCE leave alone */
+ /* CCE_INT_BLOCKED read-only */
+ }
+ for (i = 0; i < CCE_NUM_32_BIT_INT_COUNTERS; i++)
+ write_csr(dd, CCE_INT_COUNTER_ARRAY32 + (8 * i), 0);
+}
+
+/* set ASIC CSRs to chip reset defaults */
+static void reset_asic_csrs(struct hfi1_devdata *dd)
+{
+ static DEFINE_MUTEX(asic_mutex);
+ static int called;
+ int i;
+
+ /*
+ * If the HFIs are shared between separate nodes or VMs,
+ * then more will need to be done here. One idea is a module
+ * parameter that returns early, letting the first power-on or
+ * a known first load do the reset and blocking all others.
+ */
+
+ /*
+ * These CSRs should only be reset once - the first one here will
+ * do the work. Use a mutex so that a non-first caller waits until
+ * the first is finished before it can proceed.
+ */
+ mutex_lock(&asic_mutex);
+ if (called)
+ goto done;
+ called = 1;
+
+ if (dd->icode != ICODE_FPGA_EMULATION) {
+ /* emulation does not have an SBus - leave these alone */
+ /*
+ * All writes to ASIC_CFG_SBUS_REQUEST do something.
+ * Notes:
+ * o The reset is not zero if aimed at the core. See the
+ * SBus documentation for details.
+ * o If the SBus firmware has been updated (e.g. by the BIOS),
+ * will the reset revert that?
+ */
+ /* ASIC_CFG_SBUS_REQUEST leave alone */
+ write_csr(dd, ASIC_CFG_SBUS_EXECUTE, 0);
+ }
+ /* ASIC_SBUS_RESULT read-only */
+ write_csr(dd, ASIC_STS_SBUS_COUNTERS, 0);
+ for (i = 0; i < ASIC_NUM_SCRATCH; i++)
+ write_csr(dd, ASIC_CFG_SCRATCH + (8 * i), 0);
+ write_csr(dd, ASIC_CFG_MUTEX, 0); /* this will clear it */
+ write_csr(dd, ASIC_CFG_DRV_STR, 0);
+ write_csr(dd, ASIC_CFG_THERM_POLL_EN, 0);
+ /* ASIC_STS_THERM read-only */
+ /* ASIC_CFG_RESET leave alone */
+
+ write_csr(dd, ASIC_PCIE_SD_HOST_CMD, 0);
+ /* ASIC_PCIE_SD_HOST_STATUS read-only */
+ write_csr(dd, ASIC_PCIE_SD_INTRPT_DATA_CODE, 0);
+ write_csr(dd, ASIC_PCIE_SD_INTRPT_ENABLE, 0);
+ /* ASIC_PCIE_SD_INTRPT_PROGRESS read-only */
+ write_csr(dd, ASIC_PCIE_SD_INTRPT_STATUS, ~0ull); /* clear */
+ /* ASIC_HFI0_PCIE_SD_INTRPT_RSPD_DATA read-only */
+ /* ASIC_HFI1_PCIE_SD_INTRPT_RSPD_DATA read-only */
+ for (i = 0; i < 16; i++)
+ write_csr(dd, ASIC_PCIE_SD_INTRPT_LIST + (8 * i), 0);
+
+ /* ASIC_GPIO_IN read-only */
+ write_csr(dd, ASIC_GPIO_OE, 0);
+ write_csr(dd, ASIC_GPIO_INVERT, 0);
+ write_csr(dd, ASIC_GPIO_OUT, 0);
+ write_csr(dd, ASIC_GPIO_MASK, 0);
+ /* ASIC_GPIO_STATUS read-only */
+ write_csr(dd, ASIC_GPIO_CLEAR, ~0ull);
+ /* ASIC_GPIO_FORCE leave alone */
+
+ /* ASIC_QSFP1_IN read-only */
+ write_csr(dd, ASIC_QSFP1_OE, 0);
+ write_csr(dd, ASIC_QSFP1_INVERT, 0);
+ write_csr(dd, ASIC_QSFP1_OUT, 0);
+ write_csr(dd, ASIC_QSFP1_MASK, 0);
+ /* ASIC_QSFP1_STATUS read-only */
+ write_csr(dd, ASIC_QSFP1_CLEAR, ~0ull);
+ /* ASIC_QSFP1_FORCE leave alone */
+
+ /* ASIC_QSFP2_IN read-only */
+ write_csr(dd, ASIC_QSFP2_OE, 0);
+ write_csr(dd, ASIC_QSFP2_INVERT, 0);
+ write_csr(dd, ASIC_QSFP2_OUT, 0);
+ write_csr(dd, ASIC_QSFP2_MASK, 0);
+ /* ASIC_QSFP2_STATUS read-only */
+ write_csr(dd, ASIC_QSFP2_CLEAR, ~0ull);
+ /* ASIC_QSFP2_FORCE leave alone */
+
+ write_csr(dd, ASIC_EEP_CTL_STAT, ASIC_EEP_CTL_STAT_RESETCSR);
+ /* this also writes a NOP command, clearing paging mode */
+ write_csr(dd, ASIC_EEP_ADDR_CMD, 0);
+ write_csr(dd, ASIC_EEP_DATA, 0);
+
+done:
+ mutex_unlock(&asic_mutex);
+}
+
+/* set MISC CSRs to chip reset defaults */
+static void reset_misc_csrs(struct hfi1_devdata *dd)
+{
+ int i;
+
+ for (i = 0; i < 32; i++) {
+ write_csr(dd, MISC_CFG_RSA_R2 + (8 * i), 0);
+ write_csr(dd, MISC_CFG_RSA_SIGNATURE + (8 * i), 0);
+ write_csr(dd, MISC_CFG_RSA_MODULUS + (8 * i), 0);
+ }
+ /* MISC_CFG_SHA_PRELOAD leave alone - always reads 0 and can
+ only be written 128-byte chunks */
+ /* init RSA engine to clear lingering errors */
+ write_csr(dd, MISC_CFG_RSA_CMD, 1);
+ write_csr(dd, MISC_CFG_RSA_MU, 0);
+ write_csr(dd, MISC_CFG_FW_CTRL, 0);
+ /* MISC_STS_8051_DIGEST read-only */
+ /* MISC_STS_SBM_DIGEST read-only */
+ /* MISC_STS_PCIE_DIGEST read-only */
+ /* MISC_STS_FAB_DIGEST read-only */
+ /* MISC_ERR_STATUS read-only */
+ write_csr(dd, MISC_ERR_MASK, 0);
+ write_csr(dd, MISC_ERR_CLEAR, ~0ull);
+ /* MISC_ERR_FORCE leave alone */
+}
+
+/* set TXE CSRs to chip reset defaults */
+static void reset_txe_csrs(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /*
+ * TXE Kernel CSRs
+ */
+ write_csr(dd, SEND_CTRL, 0);
+ __cm_reset(dd, 0); /* reset CM internal state */
+ /* SEND_CONTEXTS read-only */
+ /* SEND_DMA_ENGINES read-only */
+ /* SEND_PIO_MEM_SIZE read-only */
+ /* SEND_DMA_MEM_SIZE read-only */
+ write_csr(dd, SEND_HIGH_PRIORITY_LIMIT, 0);
+ pio_reset_all(dd); /* SEND_PIO_INIT_CTXT */
+ /* SEND_PIO_ERR_STATUS read-only */
+ write_csr(dd, SEND_PIO_ERR_MASK, 0);
+ write_csr(dd, SEND_PIO_ERR_CLEAR, ~0ull);
+ /* SEND_PIO_ERR_FORCE leave alone */
+ /* SEND_DMA_ERR_STATUS read-only */
+ write_csr(dd, SEND_DMA_ERR_MASK, 0);
+ write_csr(dd, SEND_DMA_ERR_CLEAR, ~0ull);
+ /* SEND_DMA_ERR_FORCE leave alone */
+ /* SEND_EGRESS_ERR_STATUS read-only */
+ write_csr(dd, SEND_EGRESS_ERR_MASK, 0);
+ write_csr(dd, SEND_EGRESS_ERR_CLEAR, ~0ull);
+ /* SEND_EGRESS_ERR_FORCE leave alone */
+ write_csr(dd, SEND_BTH_QP, 0);
+ write_csr(dd, SEND_STATIC_RATE_CONTROL, 0);
+ write_csr(dd, SEND_SC2VLT0, 0);
+ write_csr(dd, SEND_SC2VLT1, 0);
+ write_csr(dd, SEND_SC2VLT2, 0);
+ write_csr(dd, SEND_SC2VLT3, 0);
+ write_csr(dd, SEND_LEN_CHECK0, 0);
+ write_csr(dd, SEND_LEN_CHECK1, 0);
+ /* SEND_ERR_STATUS read-only */
+ write_csr(dd, SEND_ERR_MASK, 0);
+ write_csr(dd, SEND_ERR_CLEAR, ~0ull);
+ /* SEND_ERR_FORCE read-only */
+ for (i = 0; i < VL_ARB_LOW_PRIO_TABLE_SIZE; i++)
+ write_csr(dd, SEND_LOW_PRIORITY_LIST + (8*i), 0);
+ for (i = 0; i < VL_ARB_HIGH_PRIO_TABLE_SIZE; i++)
+ write_csr(dd, SEND_HIGH_PRIORITY_LIST + (8*i), 0);
+ for (i = 0; i < dd->chip_send_contexts/NUM_CONTEXTS_PER_SET; i++)
+ write_csr(dd, SEND_CONTEXT_SET_CTRL + (8*i), 0);
+ for (i = 0; i < TXE_NUM_32_BIT_COUNTER; i++)
+ write_csr(dd, SEND_COUNTER_ARRAY32 + (8*i), 0);
+ for (i = 0; i < TXE_NUM_64_BIT_COUNTER; i++)
+ write_csr(dd, SEND_COUNTER_ARRAY64 + (8*i), 0);
+ write_csr(dd, SEND_CM_CTRL, SEND_CM_CTRL_RESETCSR);
+ write_csr(dd, SEND_CM_GLOBAL_CREDIT,
+ SEND_CM_GLOBAL_CREDIT_RESETCSR);
+ /* SEND_CM_CREDIT_USED_STATUS read-only */
+ write_csr(dd, SEND_CM_TIMER_CTRL, 0);
+ write_csr(dd, SEND_CM_LOCAL_AU_TABLE0_TO3, 0);
+ write_csr(dd, SEND_CM_LOCAL_AU_TABLE4_TO7, 0);
+ write_csr(dd, SEND_CM_REMOTE_AU_TABLE0_TO3, 0);
+ write_csr(dd, SEND_CM_REMOTE_AU_TABLE4_TO7, 0);
+ for (i = 0; i < TXE_NUM_DATA_VL; i++)
+ write_csr(dd, SEND_CM_CREDIT_VL + (8*i), 0);
+ write_csr(dd, SEND_CM_CREDIT_VL15, 0);
+ /* SEND_CM_CREDIT_USED_VL read-only */
+ /* SEND_CM_CREDIT_USED_VL15 read-only */
+ /* SEND_EGRESS_CTXT_STATUS read-only */
+ /* SEND_EGRESS_SEND_DMA_STATUS read-only */
+ write_csr(dd, SEND_EGRESS_ERR_INFO, ~0ull);
+ /* SEND_EGRESS_ERR_INFO read-only */
+ /* SEND_EGRESS_ERR_SOURCE read-only */
+
+ /*
+ * TXE Per-Context CSRs
+ */
+ for (i = 0; i < dd->chip_send_contexts; i++) {
+ write_kctxt_csr(dd, i, SEND_CTXT_CTRL, 0);
+ write_kctxt_csr(dd, i, SEND_CTXT_CREDIT_CTRL, 0);
+ write_kctxt_csr(dd, i, SEND_CTXT_CREDIT_RETURN_ADDR, 0);
+ write_kctxt_csr(dd, i, SEND_CTXT_CREDIT_FORCE, 0);
+ write_kctxt_csr(dd, i, SEND_CTXT_ERR_MASK, 0);
+ write_kctxt_csr(dd, i, SEND_CTXT_ERR_CLEAR, ~0ull);
+ write_kctxt_csr(dd, i, SEND_CTXT_CHECK_ENABLE, 0);
+ write_kctxt_csr(dd, i, SEND_CTXT_CHECK_VL, 0);
+ write_kctxt_csr(dd, i, SEND_CTXT_CHECK_JOB_KEY, 0);
+ write_kctxt_csr(dd, i, SEND_CTXT_CHECK_PARTITION_KEY, 0);
+ write_kctxt_csr(dd, i, SEND_CTXT_CHECK_SLID, 0);
+ write_kctxt_csr(dd, i, SEND_CTXT_CHECK_OPCODE, 0);
+ }
+
+ /*
+ * TXE Per-SDMA CSRs
+ */
+ for (i = 0; i < dd->chip_sdma_engines; i++) {
+ write_kctxt_csr(dd, i, SEND_DMA_CTRL, 0);
+ /* SEND_DMA_STATUS read-only */
+ write_kctxt_csr(dd, i, SEND_DMA_BASE_ADDR, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_LEN_GEN, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_TAIL, 0);
+ /* SEND_DMA_HEAD read-only */
+ write_kctxt_csr(dd, i, SEND_DMA_HEAD_ADDR, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_PRIORITY_THLD, 0);
+ /* SEND_DMA_IDLE_CNT read-only */
+ write_kctxt_csr(dd, i, SEND_DMA_RELOAD_CNT, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_DESC_CNT, 0);
+ /* SEND_DMA_DESC_FETCHED_CNT read-only */
+ /* SEND_DMA_ENG_ERR_STATUS read-only */
+ write_kctxt_csr(dd, i, SEND_DMA_ENG_ERR_MASK, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_ENG_ERR_CLEAR, ~0ull);
+ /* SEND_DMA_ENG_ERR_FORCE leave alone */
+ write_kctxt_csr(dd, i, SEND_DMA_CHECK_ENABLE, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_CHECK_VL, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_CHECK_JOB_KEY, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_CHECK_PARTITION_KEY, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_CHECK_SLID, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_CHECK_OPCODE, 0);
+ write_kctxt_csr(dd, i, SEND_DMA_MEMORY, 0);
+ }
+}
+
+/*
+ * Expect on entry:
+ * o Packet ingress is disabled, i.e. RcvCtrl.RcvPortEnable == 0
+ */
+static void init_rbufs(struct hfi1_devdata *dd)
+{
+ u64 reg;
+ int count;
+
+ /*
+ * Wait for DMA to stop: RxRbufPktPending and RxPktInProgress are
+ * clear.
+ */
+ count = 0;
+ while (1) {
+ reg = read_csr(dd, RCV_STATUS);
+ if ((reg & (RCV_STATUS_RX_RBUF_PKT_PENDING_SMASK
+ | RCV_STATUS_RX_PKT_IN_PROGRESS_SMASK)) == 0)
+ break;
+ /*
+ * Give up after 1ms - maximum wait time.
+ *
+ * RBuf size is 148KiB. Slowest possible is PCIe Gen1 x1 at
+ * 250MB/s bandwidth. Lower rate to 66% for overhead to get:
+ * 148 KB / (66% * 250MB/s) = 920us
+ */
+ if (count++ > 500) {
+ dd_dev_err(dd,
+ "%s: in-progress DMA not clearing: RcvStatus 0x%llx, continuing\n",
+ __func__, reg);
+ break;
+ }
+ udelay(2); /* do not busy-wait the CSR */
+ }
+
+ /* start the init - expect RcvCtrl to be 0 */
+ write_csr(dd, RCV_CTRL, RCV_CTRL_RX_RBUF_INIT_SMASK);
+
+ /*
+ * Read to force the write of Rcvtrl.RxRbufInit. There is a brief
+ * period after the write before RcvStatus.RxRbufInitDone is valid.
+ * The delay in the first run through the loop below is sufficient and
+ * required before the first read of RcvStatus.RxRbufInintDone.
+ */
+ read_csr(dd, RCV_CTRL);
+
+ /* wait for the init to finish */
+ count = 0;
+ while (1) {
+ /* delay is required first time through - see above */
+ udelay(2); /* do not busy-wait the CSR */
+ reg = read_csr(dd, RCV_STATUS);
+ if (reg & (RCV_STATUS_RX_RBUF_INIT_DONE_SMASK))
+ break;
+
+ /* give up after 100us - slowest possible at 33MHz is 73us */
+ if (count++ > 50) {
+ dd_dev_err(dd,
+ "%s: RcvStatus.RxRbufInit not set, continuing\n",
+ __func__);
+ break;
+ }
+ }
+}
+
+/* set RXE CSRs to chip reset defaults */
+static void reset_rxe_csrs(struct hfi1_devdata *dd)
+{
+ int i, j;
+
+ /*
+ * RXE Kernel CSRs
+ */
+ write_csr(dd, RCV_CTRL, 0);
+ init_rbufs(dd);
+ /* RCV_STATUS read-only */
+ /* RCV_CONTEXTS read-only */
+ /* RCV_ARRAY_CNT read-only */
+ /* RCV_BUF_SIZE read-only */
+ write_csr(dd, RCV_BTH_QP, 0);
+ write_csr(dd, RCV_MULTICAST, 0);
+ write_csr(dd, RCV_BYPASS, 0);
+ write_csr(dd, RCV_VL15, 0);
+ /* this is a clear-down */
+ write_csr(dd, RCV_ERR_INFO,
+ RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SMASK);
+ /* RCV_ERR_STATUS read-only */
+ write_csr(dd, RCV_ERR_MASK, 0);
+ write_csr(dd, RCV_ERR_CLEAR, ~0ull);
+ /* RCV_ERR_FORCE leave alone */
+ for (i = 0; i < 32; i++)
+ write_csr(dd, RCV_QP_MAP_TABLE + (8 * i), 0);
+ for (i = 0; i < 4; i++)
+ write_csr(dd, RCV_PARTITION_KEY + (8 * i), 0);
+ for (i = 0; i < RXE_NUM_32_BIT_COUNTERS; i++)
+ write_csr(dd, RCV_COUNTER_ARRAY32 + (8 * i), 0);
+ for (i = 0; i < RXE_NUM_64_BIT_COUNTERS; i++)
+ write_csr(dd, RCV_COUNTER_ARRAY64 + (8 * i), 0);
+ for (i = 0; i < RXE_NUM_RSM_INSTANCES; i++) {
+ write_csr(dd, RCV_RSM_CFG + (8 * i), 0);
+ write_csr(dd, RCV_RSM_SELECT + (8 * i), 0);
+ write_csr(dd, RCV_RSM_MATCH + (8 * i), 0);
+ }
+ for (i = 0; i < 32; i++)
+ write_csr(dd, RCV_RSM_MAP_TABLE + (8 * i), 0);
+
+ /*
+ * RXE Kernel and User Per-Context CSRs
+ */
+ for (i = 0; i < dd->chip_rcv_contexts; i++) {
+ /* kernel */
+ write_kctxt_csr(dd, i, RCV_CTXT_CTRL, 0);
+ /* RCV_CTXT_STATUS read-only */
+ write_kctxt_csr(dd, i, RCV_EGR_CTRL, 0);
+ write_kctxt_csr(dd, i, RCV_TID_CTRL, 0);
+ write_kctxt_csr(dd, i, RCV_KEY_CTRL, 0);
+ write_kctxt_csr(dd, i, RCV_HDR_ADDR, 0);
+ write_kctxt_csr(dd, i, RCV_HDR_CNT, 0);
+ write_kctxt_csr(dd, i, RCV_HDR_ENT_SIZE, 0);
+ write_kctxt_csr(dd, i, RCV_HDR_SIZE, 0);
+ write_kctxt_csr(dd, i, RCV_HDR_TAIL_ADDR, 0);
+ write_kctxt_csr(dd, i, RCV_AVAIL_TIME_OUT, 0);
+ write_kctxt_csr(dd, i, RCV_HDR_OVFL_CNT, 0);
+
+ /* user */
+ /* RCV_HDR_TAIL read-only */
+ write_uctxt_csr(dd, i, RCV_HDR_HEAD, 0);
+ /* RCV_EGR_INDEX_TAIL read-only */
+ write_uctxt_csr(dd, i, RCV_EGR_INDEX_HEAD, 0);
+ /* RCV_EGR_OFFSET_TAIL read-only */
+ for (j = 0; j < RXE_NUM_TID_FLOWS; j++) {
+ write_uctxt_csr(dd, i, RCV_TID_FLOW_TABLE + (8 * j),
+ 0);
+ }
+ }
+}
+
+/*
+ * Set sc2vl tables.
+ *
+ * They power on to zeros, so to avoid send context errors
+ * they need to be set:
+ *
+ * SC 0-7 -> VL 0-7 (respectively)
+ * SC 15 -> VL 15
+ * otherwise
+ * -> VL 0
+ */
+static void init_sc2vl_tables(struct hfi1_devdata *dd)
+{
+ int i;
+ /* init per architecture spec, constrained by hardware capability */
+
+ /* HFI maps sent packets */
+ write_csr(dd, SEND_SC2VLT0, SC2VL_VAL(
+ 0,
+ 0, 0, 1, 1,
+ 2, 2, 3, 3,
+ 4, 4, 5, 5,
+ 6, 6, 7, 7));
+ write_csr(dd, SEND_SC2VLT1, SC2VL_VAL(
+ 1,
+ 8, 0, 9, 0,
+ 10, 0, 11, 0,
+ 12, 0, 13, 0,
+ 14, 0, 15, 15));
+ write_csr(dd, SEND_SC2VLT2, SC2VL_VAL(
+ 2,
+ 16, 0, 17, 0,
+ 18, 0, 19, 0,
+ 20, 0, 21, 0,
+ 22, 0, 23, 0));
+ write_csr(dd, SEND_SC2VLT3, SC2VL_VAL(
+ 3,
+ 24, 0, 25, 0,
+ 26, 0, 27, 0,
+ 28, 0, 29, 0,
+ 30, 0, 31, 0));
+
+ /* DC maps received packets */
+ write_csr(dd, DCC_CFG_SC_VL_TABLE_15_0, DC_SC_VL_VAL(
+ 15_0,
+ 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7,
+ 8, 0, 9, 0, 10, 0, 11, 0, 12, 0, 13, 0, 14, 0, 15, 15));
+ write_csr(dd, DCC_CFG_SC_VL_TABLE_31_16, DC_SC_VL_VAL(
+ 31_16,
+ 16, 0, 17, 0, 18, 0, 19, 0, 20, 0, 21, 0, 22, 0, 23, 0,
+ 24, 0, 25, 0, 26, 0, 27, 0, 28, 0, 29, 0, 30, 0, 31, 0));
+
+ /* initialize the cached sc2vl values consistently with h/w */
+ for (i = 0; i < 32; i++) {
+ if (i < 8 || i == 15)
+ *((u8 *)(dd->sc2vl) + i) = (u8)i;
+ else
+ *((u8 *)(dd->sc2vl) + i) = 0;
+ }
+}
+
+/*
+ * Read chip sizes and then reset parts to sane, disabled, values. We cannot
+ * depend on the chip going through a power-on reset - a driver may be loaded
+ * and unloaded many times.
+ *
+ * Do not write any CSR values to the chip in this routine - there may be
+ * a reset following the (possible) FLR in this routine.
+ *
+ */
+static void init_chip(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /*
+ * Put the HFI CSRs in a known state.
+ * Combine this with a DC reset.
+ *
+ * Stop the device from doing anything while we do a
+ * reset. We know there are no other active users of
+ * the device since we are now in charge. Turn off
+ * off all outbound and inbound traffic and make sure
+ * the device does not generate any interrupts.
+ */
+
+ /* disable send contexts and SDMA engines */
+ write_csr(dd, SEND_CTRL, 0);
+ for (i = 0; i < dd->chip_send_contexts; i++)
+ write_kctxt_csr(dd, i, SEND_CTXT_CTRL, 0);
+ for (i = 0; i < dd->chip_sdma_engines; i++)
+ write_kctxt_csr(dd, i, SEND_DMA_CTRL, 0);
+ /* disable port (turn off RXE inbound traffic) and contexts */
+ write_csr(dd, RCV_CTRL, 0);
+ for (i = 0; i < dd->chip_rcv_contexts; i++)
+ write_csr(dd, RCV_CTXT_CTRL, 0);
+ /* mask all interrupt sources */
+ for (i = 0; i < CCE_NUM_INT_CSRS; i++)
+ write_csr(dd, CCE_INT_MASK + (8*i), 0ull);
+
+ /*
+ * DC Reset: do a full DC reset before the register clear.
+ * A recommended length of time to hold is one CSR read,
+ * so reread the CceDcCtrl. Then, hold the DC in reset
+ * across the clear.
+ */
+ write_csr(dd, CCE_DC_CTRL, CCE_DC_CTRL_DC_RESET_SMASK);
+ (void) read_csr(dd, CCE_DC_CTRL);
+
+ if (use_flr) {
+ /*
+ * A FLR will reset the SPC core and part of the PCIe.
+ * The parts that need to be restored have already been
+ * saved.
+ */
+ dd_dev_info(dd, "Resetting CSRs with FLR\n");
+
+ /* do the FLR, the DC reset will remain */
+ hfi1_pcie_flr(dd);
+
+ /* restore command and BARs */
+ restore_pci_variables(dd);
+
+ if (is_a0(dd)) {
+ dd_dev_info(dd, "Resetting CSRs with FLR\n");
+ hfi1_pcie_flr(dd);
+ restore_pci_variables(dd);
+ }
+
+ } else {
+ dd_dev_info(dd, "Resetting CSRs with writes\n");
+ reset_cce_csrs(dd);
+ reset_txe_csrs(dd);
+ reset_rxe_csrs(dd);
+ reset_asic_csrs(dd);
+ reset_misc_csrs(dd);
+ }
+ /* clear the DC reset */
+ write_csr(dd, CCE_DC_CTRL, 0);
+ /* Set the LED off */
+ if (is_a0(dd))
+ setextled(dd, 0);
+ /*
+ * Clear the QSFP reset.
+ * A0 leaves the out lines floating on power on, then on an FLR
+ * enforces a 0 on all out pins. The driver does not touch
+ * ASIC_QSFPn_OUT otherwise. This leaves RESET_N low and
+ * anything plugged constantly in reset, if it pays attention
+ * to RESET_N.
+ * A prime example of this is SiPh. For now, set all pins high.
+ * I2CCLK and I2CDAT will change per direction, and INT_N and
+ * MODPRS_N are input only and their value is ignored.
+ */
+ if (is_a0(dd)) {
+ write_csr(dd, ASIC_QSFP1_OUT, 0x1f);
+ write_csr(dd, ASIC_QSFP2_OUT, 0x1f);
+ }
+}
+
+static void init_early_variables(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /* assign link credit variables */
+ dd->vau = CM_VAU;
+ dd->link_credits = CM_GLOBAL_CREDITS;
+ if (is_a0(dd))
+ dd->link_credits--;
+ dd->vcu = cu_to_vcu(hfi1_cu);
+ /* enough room for 8 MAD packets plus header - 17K */
+ dd->vl15_init = (8 * (2048 + 128)) / vau_to_au(dd->vau);
+ if (dd->vl15_init > dd->link_credits)
+ dd->vl15_init = dd->link_credits;
+
+ write_uninitialized_csrs_and_memories(dd);
+
+ if (HFI1_CAP_IS_KSET(PKEY_CHECK))
+ for (i = 0; i < dd->num_pports; i++) {
+ struct hfi1_pportdata *ppd = &dd->pport[i];
+
+ set_partition_keys(ppd);
+ }
+ init_sc2vl_tables(dd);
+}
+
+static void init_kdeth_qp(struct hfi1_devdata *dd)
+{
+ /* user changed the KDETH_QP */
+ if (kdeth_qp != 0 && kdeth_qp >= 0xff) {
+ /* out of range or illegal value */
+ dd_dev_err(dd, "Invalid KDETH queue pair prefix, ignoring");
+ kdeth_qp = 0;
+ }
+ if (kdeth_qp == 0) /* not set, or failed range check */
+ kdeth_qp = DEFAULT_KDETH_QP;
+
+ write_csr(dd, SEND_BTH_QP,
+ (kdeth_qp & SEND_BTH_QP_KDETH_QP_MASK)
+ << SEND_BTH_QP_KDETH_QP_SHIFT);
+
+ write_csr(dd, RCV_BTH_QP,
+ (kdeth_qp & RCV_BTH_QP_KDETH_QP_MASK)
+ << RCV_BTH_QP_KDETH_QP_SHIFT);
+}
+
+/**
+ * init_qpmap_table
+ * @dd - device data
+ * @first_ctxt - first context
+ * @last_ctxt - first context
+ *
+ * This return sets the qpn mapping table that
+ * is indexed by qpn[8:1].
+ *
+ * The routine will round robin the 256 settings
+ * from first_ctxt to last_ctxt.
+ *
+ * The first/last looks ahead to having specialized
+ * receive contexts for mgmt and bypass. Normal
+ * verbs traffic will assumed to be on a range
+ * of receive contexts.
+ */
+static void init_qpmap_table(struct hfi1_devdata *dd,
+ u32 first_ctxt,
+ u32 last_ctxt)
+{
+ u64 reg = 0;
+ u64 regno = RCV_QP_MAP_TABLE;
+ int i;
+ u64 ctxt = first_ctxt;
+
+ for (i = 0; i < 256;) {
+ if (ctxt == VL15CTXT) {
+ ctxt++;
+ if (ctxt > last_ctxt)
+ ctxt = first_ctxt;
+ continue;
+ }
+ reg |= ctxt << (8 * (i % 8));
+ i++;
+ ctxt++;
+ if (ctxt > last_ctxt)
+ ctxt = first_ctxt;
+ if (i % 8 == 0) {
+ write_csr(dd, regno, reg);
+ reg = 0;
+ regno += 8;
+ }
+ }
+ if (i % 8)
+ write_csr(dd, regno, reg);
+
+ add_rcvctrl(dd, RCV_CTRL_RCV_QP_MAP_ENABLE_SMASK
+ | RCV_CTRL_RCV_BYPASS_ENABLE_SMASK);
+}
+
+/**
+ * init_qos - init RX qos
+ * @dd - device data
+ * @first_context
+ *
+ * This routine initializes Rule 0 and the
+ * RSM map table to implement qos.
+ *
+ * If all of the limit tests succeed,
+ * qos is applied based on the array
+ * interpretation of krcvqs where
+ * entry 0 is VL0.
+ *
+ * The number of vl bits (n) and the number of qpn
+ * bits (m) are computed to feed both the RSM map table
+ * and the single rule.
+ *
+ */
+static void init_qos(struct hfi1_devdata *dd, u32 first_ctxt)
+{
+ u8 max_by_vl = 0;
+ unsigned qpns_per_vl, ctxt, i, qpn, n = 1, m;
+ u64 *rsmmap;
+ u64 reg;
+ u8 rxcontext = is_a0(dd) ? 0 : 0xff; /* 0 is default if a0 ver. */
+
+ /* validate */
+ if (dd->n_krcv_queues <= MIN_KERNEL_KCTXTS ||
+ num_vls == 1 ||
+ krcvqsset <= 1)
+ goto bail;
+ for (i = 0; i < min_t(unsigned, num_vls, krcvqsset); i++)
+ if (krcvqs[i] > max_by_vl)
+ max_by_vl = krcvqs[i];
+ if (max_by_vl > 32)
+ goto bail;
+ qpns_per_vl = __roundup_pow_of_two(max_by_vl);
+ /* determine bits vl */
+ n = ilog2(num_vls);
+ /* determine bits for qpn */
+ m = ilog2(qpns_per_vl);
+ if ((m + n) > 7)
+ goto bail;
+ if (num_vls * qpns_per_vl > dd->chip_rcv_contexts)
+ goto bail;
+ rsmmap = kmalloc_array(NUM_MAP_REGS, sizeof(u64), GFP_KERNEL);
+ memset(rsmmap, rxcontext, NUM_MAP_REGS * sizeof(u64));
+ /* init the local copy of the table */
+ for (i = 0, ctxt = first_ctxt; i < num_vls; i++) {
+ unsigned tctxt;
+
+ for (qpn = 0, tctxt = ctxt;
+ krcvqs[i] && qpn < qpns_per_vl; qpn++) {
+ unsigned idx, regoff, regidx;
+
+ /* generate index <= 128 */
+ idx = (qpn << n) ^ i;
+ regoff = (idx % 8) * 8;
+ regidx = idx / 8;
+ reg = rsmmap[regidx];
+ /* replace 0xff with context number */
+ reg &= ~(RCV_RSM_MAP_TABLE_RCV_CONTEXT_A_MASK
+ << regoff);
+ reg |= (u64)(tctxt++) << regoff;
+ rsmmap[regidx] = reg;
+ if (tctxt == ctxt + krcvqs[i])
+ tctxt = ctxt;
+ }
+ ctxt += krcvqs[i];
+ }
+ /* flush cached copies to chip */
+ for (i = 0; i < NUM_MAP_REGS; i++)
+ write_csr(dd, RCV_RSM_MAP_TABLE + (8 * i), rsmmap[i]);
+ /* add rule0 */
+ write_csr(dd, RCV_RSM_CFG /* + (8 * 0) */,
+ RCV_RSM_CFG_ENABLE_OR_CHAIN_RSM0_MASK
+ << RCV_RSM_CFG_ENABLE_OR_CHAIN_RSM0_SHIFT |
+ 2ull << RCV_RSM_CFG_PACKET_TYPE_SHIFT);
+ write_csr(dd, RCV_RSM_SELECT /* + (8 * 0) */,
+ LRH_BTH_MATCH_OFFSET
+ << RCV_RSM_SELECT_FIELD1_OFFSET_SHIFT |
+ LRH_SC_MATCH_OFFSET << RCV_RSM_SELECT_FIELD2_OFFSET_SHIFT |
+ LRH_SC_SELECT_OFFSET << RCV_RSM_SELECT_INDEX1_OFFSET_SHIFT |
+ ((u64)n) << RCV_RSM_SELECT_INDEX1_WIDTH_SHIFT |
+ QPN_SELECT_OFFSET << RCV_RSM_SELECT_INDEX2_OFFSET_SHIFT |
+ ((u64)m + (u64)n) << RCV_RSM_SELECT_INDEX2_WIDTH_SHIFT);
+ write_csr(dd, RCV_RSM_MATCH /* + (8 * 0) */,
+ LRH_BTH_MASK << RCV_RSM_MATCH_MASK1_SHIFT |
+ LRH_BTH_VALUE << RCV_RSM_MATCH_VALUE1_SHIFT |
+ LRH_SC_MASK << RCV_RSM_MATCH_MASK2_SHIFT |
+ LRH_SC_VALUE << RCV_RSM_MATCH_VALUE2_SHIFT);
+ /* Enable RSM */
+ add_rcvctrl(dd, RCV_CTRL_RCV_RSM_ENABLE_SMASK);
+ kfree(rsmmap);
+ /* map everything else (non-VL15) to context 0 */
+ init_qpmap_table(
+ dd,
+ 0,
+ 0);
+ dd->qos_shift = n + 1;
+ return;
+bail:
+ dd->qos_shift = 1;
+ init_qpmap_table(
+ dd,
+ dd->n_krcv_queues > MIN_KERNEL_KCTXTS ? MIN_KERNEL_KCTXTS : 0,
+ dd->n_krcv_queues - 1);
+}
+
+static void init_rxe(struct hfi1_devdata *dd)
+{
+ /* enable all receive errors */
+ write_csr(dd, RCV_ERR_MASK, ~0ull);
+ /* setup QPN map table - start where VL15 context leaves off */
+ init_qos(
+ dd,
+ dd->n_krcv_queues > MIN_KERNEL_KCTXTS ? MIN_KERNEL_KCTXTS : 0);
+ /*
+ * make sure RcvCtrl.RcvWcb <= PCIe Device Control
+ * Register Max_Payload_Size (PCI_EXP_DEVCTL in Linux PCIe config
+ * space, PciCfgCap2.MaxPayloadSize in HFI). There is only one
+ * invalid configuration: RcvCtrl.RcvWcb set to its max of 256 and
+ * Max_PayLoad_Size set to its minimum of 128.
+ *
+ * Presently, RcvCtrl.RcvWcb is not modified from its default of 0
+ * (64 bytes). Max_Payload_Size is possibly modified upward in
+ * tune_pcie_caps() which is called after this routine.
+ */
+}
+
+static void init_other(struct hfi1_devdata *dd)
+{
+ /* enable all CCE errors */
+ write_csr(dd, CCE_ERR_MASK, ~0ull);
+ /* enable *some* Misc errors */
+ write_csr(dd, MISC_ERR_MASK, DRIVER_MISC_MASK);
+ /* enable all DC errors, except LCB */
+ write_csr(dd, DCC_ERR_FLG_EN, ~0ull);
+ write_csr(dd, DC_DC8051_ERR_EN, ~0ull);
+}
+
+/*
+ * Fill out the given AU table using the given CU. A CU is defined in terms
+ * AUs. The table is a an encoding: given the index, how many AUs does that
+ * represent?
+ *
+ * NOTE: Assumes that the register layout is the same for the
+ * local and remote tables.
+ */
+static void assign_cm_au_table(struct hfi1_devdata *dd, u32 cu,
+ u32 csr0to3, u32 csr4to7)
+{
+ write_csr(dd, csr0to3,
+ 0ull <<
+ SEND_CM_LOCAL_AU_TABLE0_TO3_LOCAL_AU_TABLE0_SHIFT
+ | 1ull <<
+ SEND_CM_LOCAL_AU_TABLE0_TO3_LOCAL_AU_TABLE1_SHIFT
+ | 2ull * cu <<
+ SEND_CM_LOCAL_AU_TABLE0_TO3_LOCAL_AU_TABLE2_SHIFT
+ | 4ull * cu <<
+ SEND_CM_LOCAL_AU_TABLE0_TO3_LOCAL_AU_TABLE3_SHIFT);
+ write_csr(dd, csr4to7,
+ 8ull * cu <<
+ SEND_CM_LOCAL_AU_TABLE4_TO7_LOCAL_AU_TABLE4_SHIFT
+ | 16ull * cu <<
+ SEND_CM_LOCAL_AU_TABLE4_TO7_LOCAL_AU_TABLE5_SHIFT
+ | 32ull * cu <<
+ SEND_CM_LOCAL_AU_TABLE4_TO7_LOCAL_AU_TABLE6_SHIFT
+ | 64ull * cu <<
+ SEND_CM_LOCAL_AU_TABLE4_TO7_LOCAL_AU_TABLE7_SHIFT);
+
+}
+
+static void assign_local_cm_au_table(struct hfi1_devdata *dd, u8 vcu)
+{
+ assign_cm_au_table(dd, vcu_to_cu(vcu), SEND_CM_LOCAL_AU_TABLE0_TO3,
+ SEND_CM_LOCAL_AU_TABLE4_TO7);
+}
+
+void assign_remote_cm_au_table(struct hfi1_devdata *dd, u8 vcu)
+{
+ assign_cm_au_table(dd, vcu_to_cu(vcu), SEND_CM_REMOTE_AU_TABLE0_TO3,
+ SEND_CM_REMOTE_AU_TABLE4_TO7);
+}
+
+static void init_txe(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /* enable all PIO, SDMA, general, and Egress errors */
+ write_csr(dd, SEND_PIO_ERR_MASK, ~0ull);
+ write_csr(dd, SEND_DMA_ERR_MASK, ~0ull);
+ write_csr(dd, SEND_ERR_MASK, ~0ull);
+ write_csr(dd, SEND_EGRESS_ERR_MASK, ~0ull);
+
+ /* enable all per-context and per-SDMA engine errors */
+ for (i = 0; i < dd->chip_send_contexts; i++)
+ write_kctxt_csr(dd, i, SEND_CTXT_ERR_MASK, ~0ull);
+ for (i = 0; i < dd->chip_sdma_engines; i++)
+ write_kctxt_csr(dd, i, SEND_DMA_ENG_ERR_MASK, ~0ull);
+
+ /* set the local CU to AU mapping */
+ assign_local_cm_au_table(dd, dd->vcu);
+
+ /*
+ * Set reasonable default for Credit Return Timer
+ * Don't set on Simulator - causes it to choke.
+ */
+ if (dd->icode != ICODE_FUNCTIONAL_SIMULATOR)
+ write_csr(dd, SEND_CM_TIMER_CTRL, HFI1_CREDIT_RETURN_RATE);
+}
+
+int hfi1_set_ctxt_jkey(struct hfi1_devdata *dd, unsigned ctxt, u16 jkey)
+{
+ struct hfi1_ctxtdata *rcd = dd->rcd[ctxt];
+ unsigned sctxt;
+ int ret = 0;
+ u64 reg;
+
+ if (!rcd || !rcd->sc) {
+ ret = -EINVAL;
+ goto done;
+ }
+ sctxt = rcd->sc->hw_context;
+ reg = SEND_CTXT_CHECK_JOB_KEY_MASK_SMASK | /* mask is always 1's */
+ ((jkey & SEND_CTXT_CHECK_JOB_KEY_VALUE_MASK) <<
+ SEND_CTXT_CHECK_JOB_KEY_VALUE_SHIFT);
+ /* JOB_KEY_ALLOW_PERMISSIVE is not allowed by default */
+ if (HFI1_CAP_KGET_MASK(rcd->flags, ALLOW_PERM_JKEY))
+ reg |= SEND_CTXT_CHECK_JOB_KEY_ALLOW_PERMISSIVE_SMASK;
+ write_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_JOB_KEY, reg);
+ /*
+ * Enable send-side J_KEY integrity check, unless this is A0 h/w
+ * (due to A0 erratum).
+ */
+ if (!is_a0(dd)) {
+ reg = read_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_ENABLE);
+ reg |= SEND_CTXT_CHECK_ENABLE_CHECK_JOB_KEY_SMASK;
+ write_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_ENABLE, reg);
+ }
+
+ /* Enable J_KEY check on receive context. */
+ reg = RCV_KEY_CTRL_JOB_KEY_ENABLE_SMASK |
+ ((jkey & RCV_KEY_CTRL_JOB_KEY_VALUE_MASK) <<
+ RCV_KEY_CTRL_JOB_KEY_VALUE_SHIFT);
+ write_kctxt_csr(dd, ctxt, RCV_KEY_CTRL, reg);
+done:
+ return ret;
+}
+
+int hfi1_clear_ctxt_jkey(struct hfi1_devdata *dd, unsigned ctxt)
+{
+ struct hfi1_ctxtdata *rcd = dd->rcd[ctxt];
+ unsigned sctxt;
+ int ret = 0;
+ u64 reg;
+
+ if (!rcd || !rcd->sc) {
+ ret = -EINVAL;
+ goto done;
+ }
+ sctxt = rcd->sc->hw_context;
+ write_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_JOB_KEY, 0);
+ /*
+ * Disable send-side J_KEY integrity check, unless this is A0 h/w.
+ * This check would not have been enabled for A0 h/w, see
+ * set_ctxt_jkey().
+ */
+ if (!is_a0(dd)) {
+ reg = read_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_ENABLE);
+ reg &= ~SEND_CTXT_CHECK_ENABLE_CHECK_JOB_KEY_SMASK;
+ write_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_ENABLE, reg);
+ }
+ /* Turn off the J_KEY on the receive side */
+ write_kctxt_csr(dd, ctxt, RCV_KEY_CTRL, 0);
+done:
+ return ret;
+}
+
+int hfi1_set_ctxt_pkey(struct hfi1_devdata *dd, unsigned ctxt, u16 pkey)
+{
+ struct hfi1_ctxtdata *rcd;
+ unsigned sctxt;
+ int ret = 0;
+ u64 reg;
+
+ if (ctxt < dd->num_rcv_contexts)
+ rcd = dd->rcd[ctxt];
+ else {
+ ret = -EINVAL;
+ goto done;
+ }
+ if (!rcd || !rcd->sc) {
+ ret = -EINVAL;
+ goto done;
+ }
+ sctxt = rcd->sc->hw_context;
+ reg = ((u64)pkey & SEND_CTXT_CHECK_PARTITION_KEY_VALUE_MASK) <<
+ SEND_CTXT_CHECK_PARTITION_KEY_VALUE_SHIFT;
+ write_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_PARTITION_KEY, reg);
+ reg = read_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_ENABLE);
+ reg |= SEND_CTXT_CHECK_ENABLE_CHECK_PARTITION_KEY_SMASK;
+ write_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_ENABLE, reg);
+done:
+ return ret;
+}
+
+int hfi1_clear_ctxt_pkey(struct hfi1_devdata *dd, unsigned ctxt)
+{
+ struct hfi1_ctxtdata *rcd;
+ unsigned sctxt;
+ int ret = 0;
+ u64 reg;
+
+ if (ctxt < dd->num_rcv_contexts)
+ rcd = dd->rcd[ctxt];
+ else {
+ ret = -EINVAL;
+ goto done;
+ }
+ if (!rcd || !rcd->sc) {
+ ret = -EINVAL;
+ goto done;
+ }
+ sctxt = rcd->sc->hw_context;
+ reg = read_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_ENABLE);
+ reg &= ~SEND_CTXT_CHECK_ENABLE_CHECK_PARTITION_KEY_SMASK;
+ write_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_ENABLE, reg);
+ write_kctxt_csr(dd, sctxt, SEND_CTXT_CHECK_PARTITION_KEY, 0);
+done:
+ return ret;
+}
+
+/*
+ * Start doing the clean up the the chip. Our clean up happens in multiple
+ * stages and this is just the first.
+ */
+void hfi1_start_cleanup(struct hfi1_devdata *dd)
+{
+ free_cntrs(dd);
+ free_rcverr(dd);
+ clean_up_interrupts(dd);
+}
+
+#define HFI_BASE_GUID(dev) \
+ ((dev)->base_guid & ~(1ULL << GUID_HFI_INDEX_SHIFT))
+
+/*
+ * Certain chip functions need to be initialized only once per asic
+ * instead of per-device. This function finds the peer device and
+ * checks whether that chip initialization needs to be done by this
+ * device.
+ */
+static void asic_should_init(struct hfi1_devdata *dd)
+{
+ unsigned long flags;
+ struct hfi1_devdata *tmp, *peer = NULL;
+
+ spin_lock_irqsave(&hfi1_devs_lock, flags);
+ /* Find our peer device */
+ list_for_each_entry(tmp, &hfi1_dev_list, list) {
+ if ((HFI_BASE_GUID(dd) == HFI_BASE_GUID(tmp)) &&
+ dd->unit != tmp->unit) {
+ peer = tmp;
+ break;
+ }
+ }
+
+ /*
+ * "Claim" the ASIC for initialization if it hasn't been
+ " "claimed" yet.
+ */
+ if (!peer || !(peer->flags & HFI1_DO_INIT_ASIC))
+ dd->flags |= HFI1_DO_INIT_ASIC;
+ spin_unlock_irqrestore(&hfi1_devs_lock, flags);
+}
+
+/**
+ * Allocate an initialize the device structure for the hfi.
+ * @dev: the pci_dev for hfi1_ib device
+ * @ent: pci_device_id struct for this dev
+ *
+ * Also allocates, initializes, and returns the devdata struct for this
+ * device instance
+ *
+ * This is global, and is called directly at init to set up the
+ * chip-specific function pointers for later use.
+ */
+struct hfi1_devdata *hfi1_init_dd(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct hfi1_devdata *dd;
+ struct hfi1_pportdata *ppd;
+ u64 reg;
+ int i, ret;
+ static const char * const inames[] = { /* implementation names */
+ "RTL silicon",
+ "RTL VCS simulation",
+ "RTL FPGA emulation",
+ "Functional simulator"
+ };
+
+ dd = hfi1_alloc_devdata(pdev,
+ NUM_IB_PORTS * sizeof(struct hfi1_pportdata));
+ if (IS_ERR(dd))
+ goto bail;
+ ppd = dd->pport;
+ for (i = 0; i < dd->num_pports; i++, ppd++) {
+ int vl;
+ /* init common fields */
+ hfi1_init_pportdata(pdev, ppd, dd, 0, 1);
+ /* DC supports 4 link widths */
+ ppd->link_width_supported =
+ OPA_LINK_WIDTH_1X | OPA_LINK_WIDTH_2X |
+ OPA_LINK_WIDTH_3X | OPA_LINK_WIDTH_4X;
+ ppd->link_width_downgrade_supported =
+ ppd->link_width_supported;
+ /* start out enabling only 4X */
+ ppd->link_width_enabled = OPA_LINK_WIDTH_4X;
+ ppd->link_width_downgrade_enabled =
+ ppd->link_width_downgrade_supported;
+ /* link width active is 0 when link is down */
+ /* link width downgrade active is 0 when link is down */
+
+ if (num_vls < HFI1_MIN_VLS_SUPPORTED
+ || num_vls > HFI1_MAX_VLS_SUPPORTED) {
+ hfi1_early_err(&pdev->dev,
+ "Invalid num_vls %u, using %u VLs\n",
+ num_vls, HFI1_MAX_VLS_SUPPORTED);
+ num_vls = HFI1_MAX_VLS_SUPPORTED;
+ }
+ ppd->vls_supported = num_vls;
+ ppd->vls_operational = ppd->vls_supported;
+ /* Set the default MTU. */
+ for (vl = 0; vl < num_vls; vl++)
+ dd->vld[vl].mtu = hfi1_max_mtu;
+ dd->vld[15].mtu = MAX_MAD_PACKET;
+ /*
+ * Set the initial values to reasonable default, will be set
+ * for real when link is up.
+ */
+ ppd->lstate = IB_PORT_DOWN;
+ ppd->overrun_threshold = 0x4;
+ ppd->phy_error_threshold = 0xf;
+ ppd->port_crc_mode_enabled = link_crc_mask;
+ /* initialize supported LTP CRC mode */
+ ppd->port_ltp_crc_mode = cap_to_port_ltp(link_crc_mask) << 8;
+ /* initialize enabled LTP CRC mode */
+ ppd->port_ltp_crc_mode |= cap_to_port_ltp(link_crc_mask) << 4;
+ /* start in offline */
+ ppd->host_link_state = HLS_DN_OFFLINE;
+ init_vl_arb_caches(ppd);
+ }
+
+ dd->link_default = HLS_DN_POLL;
+
+ /*
+ * Do remaining PCIe setup and save PCIe values in dd.
+ * Any error printing is already done by the init code.
+ * On return, we have the chip mapped.
+ */
+ ret = hfi1_pcie_ddinit(dd, pdev, ent);
+ if (ret < 0)
+ goto bail_free;
+
+ /* verify that reads actually work, save revision for reset check */
+ dd->revision = read_csr(dd, CCE_REVISION);
+ if (dd->revision == ~(u64)0) {
+ dd_dev_err(dd, "cannot read chip CSRs\n");
+ ret = -EINVAL;
+ goto bail_cleanup;
+ }
+ dd->majrev = (dd->revision >> CCE_REVISION_CHIP_REV_MAJOR_SHIFT)
+ & CCE_REVISION_CHIP_REV_MAJOR_MASK;
+ dd->minrev = (dd->revision >> CCE_REVISION_CHIP_REV_MINOR_SHIFT)
+ & CCE_REVISION_CHIP_REV_MINOR_MASK;
+
+ /* obtain the hardware ID - NOT related to unit, which is a
+ software enumeration */
+ reg = read_csr(dd, CCE_REVISION2);
+ dd->hfi1_id = (reg >> CCE_REVISION2_HFI_ID_SHIFT)
+ & CCE_REVISION2_HFI_ID_MASK;
+ /* the variable size will remove unwanted bits */
+ dd->icode = reg >> CCE_REVISION2_IMPL_CODE_SHIFT;
+ dd->irev = reg >> CCE_REVISION2_IMPL_REVISION_SHIFT;
+ dd_dev_info(dd, "Implementation: %s, revision 0x%x\n",
+ dd->icode < ARRAY_SIZE(inames) ? inames[dd->icode] : "unknown",
+ (int)dd->irev);
+
+ /* speeds the hardware can support */
+ dd->pport->link_speed_supported = OPA_LINK_SPEED_25G;
+ /* speeds allowed to run at */
+ dd->pport->link_speed_enabled = dd->pport->link_speed_supported;
+ /* give a reasonable active value, will be set on link up */
+ dd->pport->link_speed_active = OPA_LINK_SPEED_25G;
+
+ dd->chip_rcv_contexts = read_csr(dd, RCV_CONTEXTS);
+ dd->chip_send_contexts = read_csr(dd, SEND_CONTEXTS);
+ dd->chip_sdma_engines = read_csr(dd, SEND_DMA_ENGINES);
+ dd->chip_pio_mem_size = read_csr(dd, SEND_PIO_MEM_SIZE);
+ dd->chip_sdma_mem_size = read_csr(dd, SEND_DMA_MEM_SIZE);
+ /* fix up link widths for emulation _p */
+ ppd = dd->pport;
+ if (dd->icode == ICODE_FPGA_EMULATION && is_emulator_p(dd)) {
+ ppd->link_width_supported =
+ ppd->link_width_enabled =
+ ppd->link_width_downgrade_supported =
+ ppd->link_width_downgrade_enabled =
+ OPA_LINK_WIDTH_1X;
+ }
+ /* insure num_vls isn't larger than number of sdma engines */
+ if (HFI1_CAP_IS_KSET(SDMA) && num_vls > dd->chip_sdma_engines) {
+ dd_dev_err(dd, "num_vls %u too large, using %u VLs\n",
+ num_vls, HFI1_MAX_VLS_SUPPORTED);
+ ppd->vls_supported = num_vls = HFI1_MAX_VLS_SUPPORTED;
+ ppd->vls_operational = ppd->vls_supported;
+ }
+
+ /*
+ * Convert the ns parameter to the 64 * cclocks used in the CSR.
+ * Limit the max if larger than the field holds. If timeout is
+ * non-zero, then the calculated field will be at least 1.
+ *
+ * Must be after icode is set up - the cclock rate depends
+ * on knowing the hardware being used.
+ */
+ dd->rcv_intr_timeout_csr = ns_to_cclock(dd, rcv_intr_timeout) / 64;
+ if (dd->rcv_intr_timeout_csr >
+ RCV_AVAIL_TIME_OUT_TIME_OUT_RELOAD_MASK)
+ dd->rcv_intr_timeout_csr =
+ RCV_AVAIL_TIME_OUT_TIME_OUT_RELOAD_MASK;
+ else if (dd->rcv_intr_timeout_csr == 0 && rcv_intr_timeout)
+ dd->rcv_intr_timeout_csr = 1;
+
+ /* obtain chip sizes, reset chip CSRs */
+ init_chip(dd);
+
+ /* read in the PCIe link speed information */
+ ret = pcie_speeds(dd);
+ if (ret)
+ goto bail_cleanup;
+
+ /* needs to be done before we look for the peer device */
+ read_guid(dd);
+
+ asic_should_init(dd);
+
+ /* read in firmware */
+ ret = hfi1_firmware_init(dd);
+ if (ret)
+ goto bail_cleanup;
+
+ /*
+ * In general, the PCIe Gen3 transition must occur after the
+ * chip has been idled (so it won't initiate any PCIe transactions
+ * e.g. an interrupt) and before the driver changes any registers
+ * (the transition will reset the registers).
+ *
+ * In particular, place this call after:
+ * - init_chip() - the chip will not initiate any PCIe transactions
+ * - pcie_speeds() - reads the current link speed
+ * - hfi1_firmware_init() - the needed firmware is ready to be
+ * downloaded
+ */
+ ret = do_pcie_gen3_transition(dd);
+ if (ret)
+ goto bail_cleanup;
+
+ /* start setting dd values and adjusting CSRs */
+ init_early_variables(dd);
+
+ parse_platform_config(dd);
+
+ /* add board names as they are defined */
+ dd->boardname = kmalloc(64, GFP_KERNEL);
+ if (!dd->boardname)
+ goto bail_cleanup;
+ snprintf(dd->boardname, 64, "Board ID 0x%llx",
+ dd->revision >> CCE_REVISION_BOARD_ID_LOWER_NIBBLE_SHIFT
+ & CCE_REVISION_BOARD_ID_LOWER_NIBBLE_MASK);
+
+ snprintf(dd->boardversion, BOARD_VERS_MAX,
+ "ChipABI %u.%u, %s, ChipRev %u.%u, SW Compat %llu\n",
+ HFI1_CHIP_VERS_MAJ, HFI1_CHIP_VERS_MIN,
+ dd->boardname,
+ (u32)dd->majrev,
+ (u32)dd->minrev,
+ (dd->revision >> CCE_REVISION_SW_SHIFT)
+ & CCE_REVISION_SW_MASK);
+
+ ret = set_up_context_variables(dd);
+ if (ret)
+ goto bail_cleanup;
+
+ /* set initial RXE CSRs */
+ init_rxe(dd);
+ /* set initial TXE CSRs */
+ init_txe(dd);
+ /* set initial non-RXE, non-TXE CSRs */
+ init_other(dd);
+ /* set up KDETH QP prefix in both RX and TX CSRs */
+ init_kdeth_qp(dd);
+
+ /* send contexts must be set up before receive contexts */
+ ret = init_send_contexts(dd);
+ if (ret)
+ goto bail_cleanup;
+
+ ret = hfi1_create_ctxts(dd);
+ if (ret)
+ goto bail_cleanup;
+
+ dd->rcvhdrsize = DEFAULT_RCVHDRSIZE;
+ /*
+ * rcd[0] is guaranteed to be valid by this point. Also, all
+ * context are using the same value, as per the module parameter.
+ */
+ dd->rhf_offset = dd->rcd[0]->rcvhdrqentsize - sizeof(u64) / sizeof(u32);
+
+ ret = init_pervl_scs(dd);
+ if (ret)
+ goto bail_cleanup;
+
+ /* sdma init */
+ for (i = 0; i < dd->num_pports; ++i) {
+ ret = sdma_init(dd, i);
+ if (ret)
+ goto bail_cleanup;
+ }
+
+ /* use contexts created by hfi1_create_ctxts */
+ ret = set_up_interrupts(dd);
+ if (ret)
+ goto bail_cleanup;
+
+ /* set up LCB access - must be after set_up_interrupts() */
+ init_lcb_access(dd);
+
+ snprintf(dd->serial, SERIAL_MAX, "0x%08llx\n",
+ dd->base_guid & 0xFFFFFF);
+
+ dd->oui1 = dd->base_guid >> 56 & 0xFF;
+ dd->oui2 = dd->base_guid >> 48 & 0xFF;
+ dd->oui3 = dd->base_guid >> 40 & 0xFF;
+
+ ret = load_firmware(dd); /* asymmetric with dispose_firmware() */
+ if (ret)
+ goto bail_clear_intr;
+ check_fabric_firmware_versions(dd);
+
+ thermal_init(dd);
+
+ ret = init_cntrs(dd);
+ if (ret)
+ goto bail_clear_intr;
+
+ ret = init_rcverr(dd);
+ if (ret)
+ goto bail_free_cntrs;
+
+ ret = eprom_init(dd);
+ if (ret)
+ goto bail_free_rcverr;
+
+ goto bail;
+
+bail_free_rcverr:
+ free_rcverr(dd);
+bail_free_cntrs:
+ free_cntrs(dd);
+bail_clear_intr:
+ clean_up_interrupts(dd);
+bail_cleanup:
+ hfi1_pcie_ddcleanup(dd);
+bail_free:
+ hfi1_free_devdata(dd);
+ dd = ERR_PTR(ret);
+bail:
+ return dd;
+}
+
+static u16 delay_cycles(struct hfi1_pportdata *ppd, u32 desired_egress_rate,
+ u32 dw_len)
+{
+ u32 delta_cycles;
+ u32 current_egress_rate = ppd->current_egress_rate;
+ /* rates here are in units of 10^6 bits/sec */
+
+ if (desired_egress_rate == -1)
+ return 0; /* shouldn't happen */
+
+ if (desired_egress_rate >= current_egress_rate)
+ return 0; /* we can't help go faster, only slower */
+
+ delta_cycles = egress_cycles(dw_len * 4, desired_egress_rate) -
+ egress_cycles(dw_len * 4, current_egress_rate);
+
+ return (u16)delta_cycles;
+}
+
+
+/**
+ * create_pbc - build a pbc for transmission
+ * @flags: special case flags or-ed in built pbc
+ * @srate: static rate
+ * @vl: vl
+ * @dwlen: dword length (header words + data words + pbc words)
+ *
+ * Create a PBC with the given flags, rate, VL, and length.
+ *
+ * NOTE: The PBC created will not insert any HCRC - all callers but one are
+ * for verbs, which does not use this PSM feature. The lone other caller
+ * is for the diagnostic interface which calls this if the user does not
+ * supply their own PBC.
+ */
+u64 create_pbc(struct hfi1_pportdata *ppd, u64 flags, int srate_mbs, u32 vl,
+ u32 dw_len)
+{
+ u64 pbc, delay = 0;
+
+ if (unlikely(srate_mbs))
+ delay = delay_cycles(ppd, srate_mbs, dw_len);
+
+ pbc = flags
+ | (delay << PBC_STATIC_RATE_CONTROL_COUNT_SHIFT)
+ | ((u64)PBC_IHCRC_NONE << PBC_INSERT_HCRC_SHIFT)
+ | (vl & PBC_VL_MASK) << PBC_VL_SHIFT
+ | (dw_len & PBC_LENGTH_DWS_MASK)
+ << PBC_LENGTH_DWS_SHIFT;
+
+ return pbc;
+}
+
+#define SBUS_THERMAL 0x4f
+#define SBUS_THERM_MONITOR_MODE 0x1
+
+#define THERM_FAILURE(dev, ret, reason) \
+ dd_dev_err((dd), \
+ "Thermal sensor initialization failed: %s (%d)\n", \
+ (reason), (ret))
+
+/*
+ * Initialize the Avago Thermal sensor.
+ *
+ * After initialization, enable polling of thermal sensor through
+ * SBus interface. In order for this to work, the SBus Master
+ * firmware has to be loaded due to the fact that the HW polling
+ * logic uses SBus interrupts, which are not supported with
+ * default firmware. Otherwise, no data will be returned through
+ * the ASIC_STS_THERM CSR.
+ */
+static int thermal_init(struct hfi1_devdata *dd)
+{
+ int ret = 0;
+
+ if (dd->icode != ICODE_RTL_SILICON ||
+ !(dd->flags & HFI1_DO_INIT_ASIC))
+ return ret;
+
+ acquire_hw_mutex(dd);
+ dd_dev_info(dd, "Initializing thermal sensor\n");
+ /* Thermal Sensor Initialization */
+ /* Step 1: Reset the Thermal SBus Receiver */
+ ret = sbus_request_slow(dd, SBUS_THERMAL, 0x0,
+ RESET_SBUS_RECEIVER, 0);
+ if (ret) {
+ THERM_FAILURE(dd, ret, "Bus Reset");
+ goto done;
+ }
+ /* Step 2: Set Reset bit in Thermal block */
+ ret = sbus_request_slow(dd, SBUS_THERMAL, 0x0,
+ WRITE_SBUS_RECEIVER, 0x1);
+ if (ret) {
+ THERM_FAILURE(dd, ret, "Therm Block Reset");
+ goto done;
+ }
+ /* Step 3: Write clock divider value (100MHz -> 2MHz) */
+ ret = sbus_request_slow(dd, SBUS_THERMAL, 0x1,
+ WRITE_SBUS_RECEIVER, 0x32);
+ if (ret) {
+ THERM_FAILURE(dd, ret, "Write Clock Div");
+ goto done;
+ }
+ /* Step 4: Select temperature mode */
+ ret = sbus_request_slow(dd, SBUS_THERMAL, 0x3,
+ WRITE_SBUS_RECEIVER,
+ SBUS_THERM_MONITOR_MODE);
+ if (ret) {
+ THERM_FAILURE(dd, ret, "Write Mode Sel");
+ goto done;
+ }
+ /* Step 5: De-assert block reset and start conversion */
+ ret = sbus_request_slow(dd, SBUS_THERMAL, 0x0,
+ WRITE_SBUS_RECEIVER, 0x2);
+ if (ret) {
+ THERM_FAILURE(dd, ret, "Write Reset Deassert");
+ goto done;
+ }
+ /* Step 5.1: Wait for first conversion (21.5ms per spec) */
+ msleep(22);
+
+ /* Enable polling of thermal readings */
+ write_csr(dd, ASIC_CFG_THERM_POLL_EN, 0x1);
+done:
+ release_hw_mutex(dd);
+ return ret;
+}
+
+static void handle_temp_err(struct hfi1_devdata *dd)
+{
+ struct hfi1_pportdata *ppd = &dd->pport[0];
+ /*
+ * Thermal Critical Interrupt
+ * Put the device into forced freeze mode, take link down to
+ * offline, and put DC into reset.
+ */
+ dd_dev_emerg(dd,
+ "Critical temperature reached! Forcing device into freeze mode!\n");
+ dd->flags |= HFI1_FORCED_FREEZE;
+ start_freeze_handling(ppd, FREEZE_SELF|FREEZE_ABORT);
+ /*
+ * Shut DC down as much and as quickly as possible.
+ *
+ * Step 1: Take the link down to OFFLINE. This will cause the
+ * 8051 to put the Serdes in reset. However, we don't want to
+ * go through the entire link state machine since we want to
+ * shutdown ASAP. Furthermore, this is not a graceful shutdown
+ * but rather an attempt to save the chip.
+ * Code below is almost the same as quiet_serdes() but avoids
+ * all the extra work and the sleeps.
+ */
+ ppd->driver_link_ready = 0;
+ ppd->link_enabled = 0;
+ set_physical_link_state(dd, PLS_OFFLINE |
+ (OPA_LINKDOWN_REASON_SMA_DISABLED << 8));
+ /*
+ * Step 2: Shutdown LCB and 8051
+ * After shutdown, do not restore DC_CFG_RESET value.
+ */
+ dc_shutdown(dd);
+}
diff --git a/drivers/staging/rdma/hfi1/chip.h b/drivers/staging/rdma/hfi1/chip.h
new file mode 100644
index 0000000..f89a432
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/chip.h
@@ -0,0 +1,1035 @@
+#ifndef _CHIP_H
+#define _CHIP_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * This file contains all of the defines that is specific to the HFI chip
+ */
+
+/* sizes */
+#define CCE_NUM_MSIX_VECTORS 256
+#define CCE_NUM_INT_CSRS 12
+#define CCE_NUM_INT_MAP_CSRS 96
+#define NUM_INTERRUPT_SOURCES 768
+#define RXE_NUM_CONTEXTS 160
+#define RXE_PER_CONTEXT_SIZE 0x1000 /* 4k */
+#define RXE_NUM_TID_FLOWS 32
+#define RXE_NUM_DATA_VL 8
+#define TXE_NUM_CONTEXTS 160
+#define TXE_NUM_SDMA_ENGINES 16
+#define NUM_CONTEXTS_PER_SET 8
+#define VL_ARB_HIGH_PRIO_TABLE_SIZE 16
+#define VL_ARB_LOW_PRIO_TABLE_SIZE 16
+#define VL_ARB_TABLE_SIZE 16
+#define TXE_NUM_32_BIT_COUNTER 7
+#define TXE_NUM_64_BIT_COUNTER 30
+#define TXE_NUM_DATA_VL 8
+#define TXE_PIO_SIZE (32 * 0x100000) /* 32 MB */
+#define PIO_BLOCK_SIZE 64 /* bytes */
+#define SDMA_BLOCK_SIZE 64 /* bytes */
+#define RCV_BUF_BLOCK_SIZE 64 /* bytes */
+#define PIO_CMASK 0x7ff /* counter mask for free and fill counters */
+#define MAX_EAGER_ENTRIES 2048 /* max receive eager entries */
+#define MAX_TID_PAIR_ENTRIES 1024 /* max receive expected pairs */
+/* Virtual? Allocation Unit, defined as AU = 8*2^vAU, 64 bytes, AU is fixed
+ at 64 bytes for all generation one devices */
+#define CM_VAU 3
+/* HFI link credit count, AKA receive buffer depth (RBUF_DEPTH) */
+#define CM_GLOBAL_CREDITS 0x940
+/* Number of PKey entries in the HW */
+#define MAX_PKEY_VALUES 16
+
+#include "chip_registers.h"
+
+#define RXE_PER_CONTEXT_USER (RXE + RXE_PER_CONTEXT_OFFSET)
+#define TXE_PIO_SEND (TXE + TXE_PIO_SEND_OFFSET)
+
+/* PBC flags */
+#define PBC_INTR (1ull << 31)
+#define PBC_DC_INFO_SHIFT (30)
+#define PBC_DC_INFO (1ull << PBC_DC_INFO_SHIFT)
+#define PBC_TEST_EBP (1ull << 29)
+#define PBC_PACKET_BYPASS (1ull << 28)
+#define PBC_CREDIT_RETURN (1ull << 25)
+#define PBC_INSERT_BYPASS_ICRC (1ull << 24)
+#define PBC_TEST_BAD_ICRC (1ull << 23)
+#define PBC_FECN (1ull << 22)
+
+/* PbcInsertHcrc field settings */
+#define PBC_IHCRC_LKDETH 0x0 /* insert @ local KDETH offset */
+#define PBC_IHCRC_GKDETH 0x1 /* insert @ global KDETH offset */
+#define PBC_IHCRC_NONE 0x2 /* no HCRC inserted */
+
+/* PBC fields */
+#define PBC_STATIC_RATE_CONTROL_COUNT_SHIFT 32
+#define PBC_STATIC_RATE_CONTROL_COUNT_MASK 0xffffull
+#define PBC_STATIC_RATE_CONTROL_COUNT_SMASK \
+ (PBC_STATIC_RATE_CONTROL_COUNT_MASK << \
+ PBC_STATIC_RATE_CONTROL_COUNT_SHIFT)
+
+#define PBC_INSERT_HCRC_SHIFT 26
+#define PBC_INSERT_HCRC_MASK 0x3ull
+#define PBC_INSERT_HCRC_SMASK \
+ (PBC_INSERT_HCRC_MASK << PBC_INSERT_HCRC_SHIFT)
+
+#define PBC_VL_SHIFT 12
+#define PBC_VL_MASK 0xfull
+#define PBC_VL_SMASK (PBC_VL_MASK << PBC_VL_SHIFT)
+
+#define PBC_LENGTH_DWS_SHIFT 0
+#define PBC_LENGTH_DWS_MASK 0xfffull
+#define PBC_LENGTH_DWS_SMASK \
+ (PBC_LENGTH_DWS_MASK << PBC_LENGTH_DWS_SHIFT)
+
+/* Credit Return Fields */
+#define CR_COUNTER_SHIFT 0
+#define CR_COUNTER_MASK 0x7ffull
+#define CR_COUNTER_SMASK (CR_COUNTER_MASK << CR_COUNTER_SHIFT)
+
+#define CR_STATUS_SHIFT 11
+#define CR_STATUS_MASK 0x1ull
+#define CR_STATUS_SMASK (CR_STATUS_MASK << CR_STATUS_SHIFT)
+
+#define CR_CREDIT_RETURN_DUE_TO_PBC_SHIFT 12
+#define CR_CREDIT_RETURN_DUE_TO_PBC_MASK 0x1ull
+#define CR_CREDIT_RETURN_DUE_TO_PBC_SMASK \
+ (CR_CREDIT_RETURN_DUE_TO_PBC_MASK << \
+ CR_CREDIT_RETURN_DUE_TO_PBC_SHIFT)
+
+#define CR_CREDIT_RETURN_DUE_TO_THRESHOLD_SHIFT 13
+#define CR_CREDIT_RETURN_DUE_TO_THRESHOLD_MASK 0x1ull
+#define CR_CREDIT_RETURN_DUE_TO_THRESHOLD_SMASK \
+ (CR_CREDIT_RETURN_DUE_TO_THRESHOLD_MASK << \
+ CR_CREDIT_RETURN_DUE_TO_THRESHOLD_SHIFT)
+
+#define CR_CREDIT_RETURN_DUE_TO_ERR_SHIFT 14
+#define CR_CREDIT_RETURN_DUE_TO_ERR_MASK 0x1ull
+#define CR_CREDIT_RETURN_DUE_TO_ERR_SMASK \
+ (CR_CREDIT_RETURN_DUE_TO_ERR_MASK << \
+ CR_CREDIT_RETURN_DUE_TO_ERR_SHIFT)
+
+#define CR_CREDIT_RETURN_DUE_TO_FORCE_SHIFT 15
+#define CR_CREDIT_RETURN_DUE_TO_FORCE_MASK 0x1ull
+#define CR_CREDIT_RETURN_DUE_TO_FORCE_SMASK \
+ (CR_CREDIT_RETURN_DUE_TO_FORCE_MASK << \
+ CR_CREDIT_RETURN_DUE_TO_FORCE_SHIFT)
+
+/* interrupt source numbers */
+#define IS_GENERAL_ERR_START 0
+#define IS_SDMAENG_ERR_START 16
+#define IS_SENDCTXT_ERR_START 32
+#define IS_SDMA_START 192 /* includes SDmaProgress,SDmaIdle */
+#define IS_VARIOUS_START 240
+#define IS_DC_START 248
+#define IS_RCVAVAIL_START 256
+#define IS_RCVURGENT_START 416
+#define IS_SENDCREDIT_START 576
+#define IS_RESERVED_START 736
+#define IS_MAX_SOURCES 768
+
+/* derived interrupt source values */
+#define IS_GENERAL_ERR_END IS_SDMAENG_ERR_START
+#define IS_SDMAENG_ERR_END IS_SENDCTXT_ERR_START
+#define IS_SENDCTXT_ERR_END IS_SDMA_START
+#define IS_SDMA_END IS_VARIOUS_START
+#define IS_VARIOUS_END IS_DC_START
+#define IS_DC_END IS_RCVAVAIL_START
+#define IS_RCVAVAIL_END IS_RCVURGENT_START
+#define IS_RCVURGENT_END IS_SENDCREDIT_START
+#define IS_SENDCREDIT_END IS_RESERVED_START
+#define IS_RESERVED_END IS_MAX_SOURCES
+
+/* absolute interrupt numbers for QSFP1Int and QSFP2Int */
+#define QSFP1_INT 242
+#define QSFP2_INT 243
+
+/* DCC_CFG_PORT_CONFIG logical link states */
+#define LSTATE_DOWN 0x1
+#define LSTATE_INIT 0x2
+#define LSTATE_ARMED 0x3
+#define LSTATE_ACTIVE 0x4
+
+/* DC8051_STS_CUR_STATE port values (physical link states) */
+#define PLS_DISABLED 0x30
+#define PLS_OFFLINE 0x90
+#define PLS_OFFLINE_QUIET 0x90
+#define PLS_OFFLINE_PLANNED_DOWN_INFORM 0x91
+#define PLS_OFFLINE_READY_TO_QUIET_LT 0x92
+#define PLS_OFFLINE_REPORT_FAILURE 0x93
+#define PLS_OFFLINE_READY_TO_QUIET_BCC 0x94
+#define PLS_POLLING 0x20
+#define PLS_POLLING_QUIET 0x20
+#define PLS_POLLING_ACTIVE 0x21
+#define PLS_CONFIGPHY 0x40
+#define PLS_CONFIGPHY_DEBOUCE 0x40
+#define PLS_CONFIGPHY_ESTCOMM 0x41
+#define PLS_CONFIGPHY_ESTCOMM_TXRX_HUNT 0x42
+#define PLS_CONFIGPHY_ESTcOMM_LOCAL_COMPLETE 0x43
+#define PLS_CONFIGPHY_OPTEQ 0x44
+#define PLS_CONFIGPHY_OPTEQ_OPTIMIZING 0x44
+#define PLS_CONFIGPHY_OPTEQ_LOCAL_COMPLETE 0x45
+#define PLS_CONFIGPHY_VERIFYCAP 0x46
+#define PLS_CONFIGPHY_VERIFYCAP_EXCHANGE 0x46
+#define PLS_CONFIGPHY_VERIFYCAP_LOCAL_COMPLETE 0x47
+#define PLS_CONFIGLT 0x48
+#define PLS_CONFIGLT_CONFIGURE 0x48
+#define PLS_CONFIGLT_LINK_TRANSFER_ACTIVE 0x49
+#define PLS_LINKUP 0x50
+#define PLS_PHYTEST 0xB0
+#define PLS_INTERNAL_SERDES_LOOPBACK 0xe1
+#define PLS_QUICK_LINKUP 0xe2
+
+/* DC_DC8051_CFG_HOST_CMD_0.REQ_TYPE - 8051 host commands */
+#define HCMD_LOAD_CONFIG_DATA 0x01
+#define HCMD_READ_CONFIG_DATA 0x02
+#define HCMD_CHANGE_PHY_STATE 0x03
+#define HCMD_SEND_LCB_IDLE_MSG 0x04
+#define HCMD_MISC 0x05
+#define HCMD_READ_LCB_IDLE_MSG 0x06
+#define HCMD_READ_LCB_CSR 0x07
+#define HCMD_INTERFACE_TEST 0xff
+
+/* DC_DC8051_CFG_HOST_CMD_1.RETURN_CODE - 8051 host command return */
+#define HCMD_SUCCESS 2
+
+/* DC_DC8051_DBG_ERR_INFO_SET_BY_8051.ERROR - error flags */
+#define SPICO_ROM_FAILED (1 << 0)
+#define UNKNOWN_FRAME (1 << 1)
+#define TARGET_BER_NOT_MET (1 << 2)
+#define FAILED_SERDES_INTERNAL_LOOPBACK (1 << 3)
+#define FAILED_SERDES_INIT (1 << 4)
+#define FAILED_LNI_POLLING (1 << 5)
+#define FAILED_LNI_DEBOUNCE (1 << 6)
+#define FAILED_LNI_ESTBCOMM (1 << 7)
+#define FAILED_LNI_OPTEQ (1 << 8)
+#define FAILED_LNI_VERIFY_CAP1 (1 << 9)
+#define FAILED_LNI_VERIFY_CAP2 (1 << 10)
+#define FAILED_LNI_CONFIGLT (1 << 11)
+
+#define FAILED_LNI (FAILED_LNI_POLLING | FAILED_LNI_DEBOUNCE \
+ | FAILED_LNI_ESTBCOMM | FAILED_LNI_OPTEQ \
+ | FAILED_LNI_VERIFY_CAP1 \
+ | FAILED_LNI_VERIFY_CAP2 \
+ | FAILED_LNI_CONFIGLT)
+
+/* DC_DC8051_DBG_ERR_INFO_SET_BY_8051.HOST_MSG - host message flags */
+#define HOST_REQ_DONE (1 << 0)
+#define BC_PWR_MGM_MSG (1 << 1)
+#define BC_SMA_MSG (1 << 2)
+#define BC_BCC_UNKOWN_MSG (1 << 3)
+#define BC_IDLE_UNKNOWN_MSG (1 << 4)
+#define EXT_DEVICE_CFG_REQ (1 << 5)
+#define VERIFY_CAP_FRAME (1 << 6)
+#define LINKUP_ACHIEVED (1 << 7)
+#define LINK_GOING_DOWN (1 << 8)
+#define LINK_WIDTH_DOWNGRADED (1 << 9)
+
+/* DC_DC8051_CFG_EXT_DEV_1.REQ_TYPE - 8051 host requests */
+#define HREQ_LOAD_CONFIG 0x01
+#define HREQ_SAVE_CONFIG 0x02
+#define HREQ_READ_CONFIG 0x03
+#define HREQ_SET_TX_EQ_ABS 0x04
+#define HREQ_SET_TX_EQ_REL 0x05
+#define HREQ_ENABLE 0x06
+#define HREQ_CONFIG_DONE 0xfe
+#define HREQ_INTERFACE_TEST 0xff
+
+/* DC_DC8051_CFG_EXT_DEV_0.RETURN_CODE - 8051 host request return codes */
+#define HREQ_INVALID 0x01
+#define HREQ_SUCCESS 0x02
+#define HREQ_NOT_SUPPORTED 0x03
+#define HREQ_FEATURE_NOT_SUPPORTED 0x04 /* request specific feature */
+#define HREQ_REQUEST_REJECTED 0xfe
+#define HREQ_EXECUTION_ONGOING 0xff
+
+/* MISC host command functions */
+#define HCMD_MISC_REQUEST_LCB_ACCESS 0x1
+#define HCMD_MISC_GRANT_LCB_ACCESS 0x2
+
+/* idle flit message types */
+#define IDLE_PHYSICAL_LINK_MGMT 0x1
+#define IDLE_CRU 0x2
+#define IDLE_SMA 0x3
+#define IDLE_POWER_MGMT 0x4
+
+/* idle flit message send fields (both send and read) */
+#define IDLE_PAYLOAD_MASK 0xffffffffffull /* 40 bits */
+#define IDLE_PAYLOAD_SHIFT 8
+#define IDLE_MSG_TYPE_MASK 0xf
+#define IDLE_MSG_TYPE_SHIFT 0
+
+/* idle flit message read fields */
+#define READ_IDLE_MSG_TYPE_MASK 0xf
+#define READ_IDLE_MSG_TYPE_SHIFT 0
+
+/* SMA idle flit payload commands */
+#define SMA_IDLE_ARM 1
+#define SMA_IDLE_ACTIVE 2
+
+/* DC_DC8051_CFG_MODE.GENERAL bits */
+#define DISABLE_SELF_GUID_CHECK 0x2
+
+/*
+ * Eager buffer minimum and maximum sizes supported by the hardware.
+ * All power-of-two sizes in between are supported as well.
+ * MAX_EAGER_BUFFER_TOTAL is the maximum size of memory
+ * allocatable for Eager buffer to a single context. All others
+ * are limits for the RcvArray entries.
+ */
+#define MIN_EAGER_BUFFER (4 * 1024)
+#define MAX_EAGER_BUFFER (256 * 1024)
+#define MAX_EAGER_BUFFER_TOTAL (64 * (1 << 20)) /* max per ctxt 64MB */
+#define MAX_EXPECTED_BUFFER (2048 * 1024)
+
+/*
+ * Receive expected base and count and eager base and count increment -
+ * the CSR fields hold multiples of this value.
+ */
+#define RCV_SHIFT 3
+#define RCV_INCREMENT (1 << RCV_SHIFT)
+
+/*
+ * Receive header queue entry increment - the CSR holds multiples of
+ * this value.
+ */
+#define HDRQ_SIZE_SHIFT 5
+#define HDRQ_INCREMENT (1 << HDRQ_SIZE_SHIFT)
+
+/*
+ * Freeze handling flags
+ */
+#define FREEZE_ABORT 0x01 /* do not do recovery */
+#define FREEZE_SELF 0x02 /* initiate the freeze */
+#define FREEZE_LINK_DOWN 0x04 /* link is down */
+
+/*
+ * Chip implementation codes.
+ */
+#define ICODE_RTL_SILICON 0x00
+#define ICODE_RTL_VCS_SIMULATION 0x01
+#define ICODE_FPGA_EMULATION 0x02
+#define ICODE_FUNCTIONAL_SIMULATOR 0x03
+
+/*
+ * 8051 data memory size.
+ */
+#define DC8051_DATA_MEM_SIZE 0x1000
+
+/*
+ * 8051 firmware registers
+ */
+#define NUM_GENERAL_FIELDS 0x17
+#define NUM_LANE_FIELDS 0x8
+
+/* 8051 general register Field IDs */
+#define TX_SETTINGS 0x06
+#define VERIFY_CAP_LOCAL_PHY 0x07
+#define VERIFY_CAP_LOCAL_FABRIC 0x08
+#define VERIFY_CAP_LOCAL_LINK_WIDTH 0x09
+#define LOCAL_DEVICE_ID 0x0a
+#define LOCAL_LNI_INFO 0x0c
+#define REMOTE_LNI_INFO 0x0d
+#define MISC_STATUS 0x0e
+#define VERIFY_CAP_REMOTE_PHY 0x0f
+#define VERIFY_CAP_REMOTE_FABRIC 0x10
+#define VERIFY_CAP_REMOTE_LINK_WIDTH 0x11
+#define LAST_LOCAL_STATE_COMPLETE 0x12
+#define LAST_REMOTE_STATE_COMPLETE 0x13
+#define LINK_QUALITY_INFO 0x14
+#define REMOTE_DEVICE_ID 0x15
+
+/* Lane ID for general configuration registers */
+#define GENERAL_CONFIG 4
+
+/* LOAD_DATA 8051 command shifts and fields */
+#define LOAD_DATA_FIELD_ID_SHIFT 40
+#define LOAD_DATA_FIELD_ID_MASK 0xfull
+#define LOAD_DATA_LANE_ID_SHIFT 32
+#define LOAD_DATA_LANE_ID_MASK 0xfull
+#define LOAD_DATA_DATA_SHIFT 0x0
+#define LOAD_DATA_DATA_MASK 0xffffffffull
+
+/* READ_DATA 8051 command shifts and fields */
+#define READ_DATA_FIELD_ID_SHIFT 40
+#define READ_DATA_FIELD_ID_MASK 0xffull
+#define READ_DATA_LANE_ID_SHIFT 32
+#define READ_DATA_LANE_ID_MASK 0xffull
+#define READ_DATA_DATA_SHIFT 0x0
+#define READ_DATA_DATA_MASK 0xffffffffull
+
+/* TX settings fields */
+#define ENABLE_LANE_TX_SHIFT 0
+#define ENABLE_LANE_TX_MASK 0xff
+#define TX_POLARITY_INVERSION_SHIFT 8
+#define TX_POLARITY_INVERSION_MASK 0xff
+#define RX_POLARITY_INVERSION_SHIFT 16
+#define RX_POLARITY_INVERSION_MASK 0xff
+#define MAX_RATE_SHIFT 24
+#define MAX_RATE_MASK 0xff
+
+/* verify capability PHY fields */
+#define CONTINIOUS_REMOTE_UPDATE_SUPPORT_SHIFT 0x4
+#define CONTINIOUS_REMOTE_UPDATE_SUPPORT_MASK 0x1
+#define POWER_MANAGEMENT_SHIFT 0x0
+#define POWER_MANAGEMENT_MASK 0xf
+
+/* 8051 lane register Field IDs */
+#define SPICO_FW_VERSION 0x7 /* SPICO firmware version */
+
+/* SPICO firmware version fields */
+#define SPICO_ROM_VERSION_SHIFT 0
+#define SPICO_ROM_VERSION_MASK 0xffff
+#define SPICO_ROM_PROD_ID_SHIFT 16
+#define SPICO_ROM_PROD_ID_MASK 0xffff
+
+/* verify capability fabric fields */
+#define VAU_SHIFT 0
+#define VAU_MASK 0x0007
+#define Z_SHIFT 3
+#define Z_MASK 0x0001
+#define VCU_SHIFT 4
+#define VCU_MASK 0x0007
+#define VL15BUF_SHIFT 8
+#define VL15BUF_MASK 0x0fff
+#define CRC_SIZES_SHIFT 20
+#define CRC_SIZES_MASK 0x7
+
+/* verify capability local link width fields */
+#define LINK_WIDTH_SHIFT 0 /* also for remote link width */
+#define LINK_WIDTH_MASK 0xffff /* also for remote link width */
+#define LOCAL_FLAG_BITS_SHIFT 16
+#define LOCAL_FLAG_BITS_MASK 0xff
+#define MISC_CONFIG_BITS_SHIFT 24
+#define MISC_CONFIG_BITS_MASK 0xff
+
+/* verify capability remote link width fields */
+#define REMOTE_TX_RATE_SHIFT 16
+#define REMOTE_TX_RATE_MASK 0xff
+
+/* LOCAL_DEVICE_ID fields */
+#define LOCAL_DEVICE_REV_SHIFT 0
+#define LOCAL_DEVICE_REV_MASK 0xff
+#define LOCAL_DEVICE_ID_SHIFT 8
+#define LOCAL_DEVICE_ID_MASK 0xffff
+
+/* REMOTE_DEVICE_ID fields */
+#define REMOTE_DEVICE_REV_SHIFT 0
+#define REMOTE_DEVICE_REV_MASK 0xff
+#define REMOTE_DEVICE_ID_SHIFT 8
+#define REMOTE_DEVICE_ID_MASK 0xffff
+
+/* local LNI link width fields */
+#define ENABLE_LANE_RX_SHIFT 16
+#define ENABLE_LANE_RX_MASK 0xff
+
+/* mask, shift for reading 'mgmt_enabled' value from REMOTE_LNI_INFO field */
+#define MGMT_ALLOWED_SHIFT 23
+#define MGMT_ALLOWED_MASK 0x1
+
+/* mask, shift for 'link_quality' within LINK_QUALITY_INFO field */
+#define LINK_QUALITY_SHIFT 24
+#define LINK_QUALITY_MASK 0x7
+
+/*
+ * mask, shift for reading 'planned_down_remote_reason_code'
+ * from LINK_QUALITY_INFO field
+ */
+#define DOWN_REMOTE_REASON_SHIFT 16
+#define DOWN_REMOTE_REASON_MASK 0xff
+
+/* verify capability PHY power management bits */
+#define PWRM_BER_CONTROL 0x1
+#define PWRM_BANDWIDTH_CONTROL 0x2
+
+/* verify capability fabric CRC size bits */
+enum {
+ CAP_CRC_14B = (1 << 0), /* 14b CRC */
+ CAP_CRC_48B = (1 << 1), /* 48b CRC */
+ CAP_CRC_12B_16B_PER_LANE = (1 << 2) /* 12b-16b per lane CRC */
+};
+
+#define SUPPORTED_CRCS (CAP_CRC_14B | CAP_CRC_48B)
+
+/* misc status version fields */
+#define STS_FM_VERSION_A_SHIFT 16
+#define STS_FM_VERSION_A_MASK 0xff
+#define STS_FM_VERSION_B_SHIFT 24
+#define STS_FM_VERSION_B_MASK 0xff
+
+/* LCB_CFG_CRC_MODE TX_VAL and RX_VAL CRC mode values */
+#define LCB_CRC_16B 0x0 /* 16b CRC */
+#define LCB_CRC_14B 0x1 /* 14b CRC */
+#define LCB_CRC_48B 0x2 /* 48b CRC */
+#define LCB_CRC_12B_16B_PER_LANE 0x3 /* 12b-16b per lane CRC */
+
+/* the following enum is (almost) a copy/paste of the definition
+ * in the OPA spec, section 20.2.2.6.8 (PortInfo) */
+enum {
+ PORT_LTP_CRC_MODE_NONE = 0,
+ PORT_LTP_CRC_MODE_14 = 1, /* 14-bit LTP CRC mode (optional) */
+ PORT_LTP_CRC_MODE_16 = 2, /* 16-bit LTP CRC mode */
+ PORT_LTP_CRC_MODE_48 = 4,
+ /* 48-bit overlapping LTP CRC mode (optional) */
+ PORT_LTP_CRC_MODE_PER_LANE = 8
+ /* 12 to 16 bit per lane LTP CRC mode (optional) */
+};
+
+/* timeouts */
+#define LINK_RESTART_DELAY 1000 /* link restart delay, in ms */
+#define TIMEOUT_8051_START 5000 /* 8051 start timeout, in ms */
+#define DC8051_COMMAND_TIMEOUT 20000 /* DC8051 command timeout, in ms */
+#define FREEZE_STATUS_TIMEOUT 20 /* wait for freeze indicators, in ms */
+#define VL_STATUS_CLEAR_TIMEOUT 5000 /* per-VL status clear, in ms */
+#define CCE_STATUS_TIMEOUT 10 /* time to clear CCE Status, in ms */
+
+/* cclock tick time, in picoseconds per tick: 1/speed * 10^12 */
+#define ASIC_CCLOCK_PS 1242 /* 805 MHz */
+#define FPGA_CCLOCK_PS 30300 /* 33 MHz */
+
+/*
+ * Mask of enabled MISC errors. Do not enable the two RSA engine errors -
+ * see firmware.c:run_rsa() for details.
+ */
+#define DRIVER_MISC_MASK \
+ (~(MISC_ERR_STATUS_MISC_FW_AUTH_FAILED_ERR_SMASK \
+ | MISC_ERR_STATUS_MISC_KEY_MISMATCH_ERR_SMASK))
+
+/* valid values for the loopback module parameter */
+#define LOOPBACK_NONE 0 /* no loopback - default */
+#define LOOPBACK_SERDES 1
+#define LOOPBACK_LCB 2
+#define LOOPBACK_CABLE 3 /* external cable */
+
+/* read and write hardware registers */
+u64 read_csr(const struct hfi1_devdata *dd, u32 offset);
+void write_csr(const struct hfi1_devdata *dd, u32 offset, u64 value);
+
+/*
+ * The *_kctxt_* flavor of the CSR read/write functions are for
+ * per-context or per-SDMA CSRs that are not mappable to user-space.
+ * Their spacing is not a PAGE_SIZE multiple.
+ */
+static inline u64 read_kctxt_csr(const struct hfi1_devdata *dd, int ctxt,
+ u32 offset0)
+{
+ /* kernel per-context CSRs are separated by 0x100 */
+ return read_csr(dd, offset0 + (0x100 * ctxt));
+}
+
+static inline void write_kctxt_csr(struct hfi1_devdata *dd, int ctxt,
+ u32 offset0, u64 value)
+{
+ /* kernel per-context CSRs are separated by 0x100 */
+ write_csr(dd, offset0 + (0x100 * ctxt), value);
+}
+
+int read_lcb_csr(struct hfi1_devdata *dd, u32 offset, u64 *data);
+int write_lcb_csr(struct hfi1_devdata *dd, u32 offset, u64 data);
+
+void __iomem *get_csr_addr(
+ struct hfi1_devdata *dd,
+ u32 offset);
+
+static inline void __iomem *get_kctxt_csr_addr(
+ struct hfi1_devdata *dd,
+ int ctxt,
+ u32 offset0)
+{
+ return get_csr_addr(dd, offset0 + (0x100 * ctxt));
+}
+
+/*
+ * The *_uctxt_* flavor of the CSR read/write functions are for
+ * per-context CSRs that are mappable to user space. All these CSRs
+ * are spaced by a PAGE_SIZE multiple in order to be mappable to
+ * different processes without exposing other contexts' CSRs
+ */
+static inline u64 read_uctxt_csr(const struct hfi1_devdata *dd, int ctxt,
+ u32 offset0)
+{
+ /* user per-context CSRs are separated by 0x1000 */
+ return read_csr(dd, offset0 + (0x1000 * ctxt));
+}
+
+static inline void write_uctxt_csr(struct hfi1_devdata *dd, int ctxt,
+ u32 offset0, u64 value)
+{
+ /* user per-context CSRs are separated by 0x1000 */
+ write_csr(dd, offset0 + (0x1000 * ctxt), value);
+}
+
+u64 create_pbc(struct hfi1_pportdata *ppd, u64, int, u32, u32);
+
+/* firmware.c */
+#define NUM_PCIE_SERDES 16 /* number of PCIe serdes on the SBus */
+extern const u8 pcie_serdes_broadcast[];
+extern const u8 pcie_pcs_addrs[2][NUM_PCIE_SERDES];
+/* SBus commands */
+#define RESET_SBUS_RECEIVER 0x20
+#define WRITE_SBUS_RECEIVER 0x21
+void sbus_request(struct hfi1_devdata *dd,
+ u8 receiver_addr, u8 data_addr, u8 command, u32 data_in);
+int sbus_request_slow(struct hfi1_devdata *dd,
+ u8 receiver_addr, u8 data_addr, u8 command, u32 data_in);
+void set_sbus_fast_mode(struct hfi1_devdata *dd);
+void clear_sbus_fast_mode(struct hfi1_devdata *dd);
+int hfi1_firmware_init(struct hfi1_devdata *dd);
+int load_pcie_firmware(struct hfi1_devdata *dd);
+int load_firmware(struct hfi1_devdata *dd);
+void dispose_firmware(void);
+int acquire_hw_mutex(struct hfi1_devdata *dd);
+void release_hw_mutex(struct hfi1_devdata *dd);
+void fabric_serdes_reset(struct hfi1_devdata *dd);
+int read_8051_data(struct hfi1_devdata *dd, u32 addr, u32 len, u64 *result);
+
+/* chip.c */
+void read_misc_status(struct hfi1_devdata *dd, u8 *ver_a, u8 *ver_b);
+void read_guid(struct hfi1_devdata *dd);
+int wait_fm_ready(struct hfi1_devdata *dd, u32 mstimeout);
+void set_link_down_reason(struct hfi1_pportdata *ppd, u8 lcl_reason,
+ u8 neigh_reason, u8 rem_reason);
+int set_link_state(struct hfi1_pportdata *, u32 state);
+int port_ltp_to_cap(int port_ltp);
+void handle_verify_cap(struct work_struct *work);
+void handle_freeze(struct work_struct *work);
+void handle_link_up(struct work_struct *work);
+void handle_link_down(struct work_struct *work);
+void handle_link_downgrade(struct work_struct *work);
+void handle_link_bounce(struct work_struct *work);
+void handle_sma_message(struct work_struct *work);
+void start_freeze_handling(struct hfi1_pportdata *ppd, int flags);
+int send_idle_sma(struct hfi1_devdata *dd, u64 message);
+int start_link(struct hfi1_pportdata *ppd);
+void init_qsfp(struct hfi1_pportdata *ppd);
+int bringup_serdes(struct hfi1_pportdata *ppd);
+void set_intr_state(struct hfi1_devdata *dd, u32 enable);
+void apply_link_downgrade_policy(struct hfi1_pportdata *ppd,
+ int refresh_widths);
+void update_usrhead(struct hfi1_ctxtdata *, u32, u32, u32, u32, u32);
+int stop_drain_data_vls(struct hfi1_devdata *dd);
+int open_fill_data_vls(struct hfi1_devdata *dd);
+u32 ns_to_cclock(struct hfi1_devdata *dd, u32 ns);
+u32 cclock_to_ns(struct hfi1_devdata *dd, u32 cclock);
+void get_linkup_link_widths(struct hfi1_pportdata *ppd);
+void read_ltp_rtt(struct hfi1_devdata *dd);
+void clear_linkup_counters(struct hfi1_devdata *dd);
+u32 hdrqempty(struct hfi1_ctxtdata *rcd);
+int is_a0(struct hfi1_devdata *dd);
+int is_ax(struct hfi1_devdata *dd);
+int is_bx(struct hfi1_devdata *dd);
+u32 read_physical_state(struct hfi1_devdata *dd);
+u32 chip_to_opa_pstate(struct hfi1_devdata *dd, u32 chip_pstate);
+u32 get_logical_state(struct hfi1_pportdata *ppd);
+const char *opa_lstate_name(u32 lstate);
+const char *opa_pstate_name(u32 pstate);
+u32 driver_physical_state(struct hfi1_pportdata *ppd);
+u32 driver_logical_state(struct hfi1_pportdata *ppd);
+
+int acquire_lcb_access(struct hfi1_devdata *dd, int sleep_ok);
+int release_lcb_access(struct hfi1_devdata *dd, int sleep_ok);
+#define LCB_START DC_LCB_CSRS
+#define LCB_END DC_8051_CSRS /* next block is 8051 */
+static inline int is_lcb_offset(u32 offset)
+{
+ return (offset >= LCB_START && offset < LCB_END);
+}
+
+extern uint num_vls;
+
+extern uint disable_integrity;
+u64 read_dev_cntr(struct hfi1_devdata *dd, int index, int vl);
+u64 write_dev_cntr(struct hfi1_devdata *dd, int index, int vl, u64 data);
+u64 read_port_cntr(struct hfi1_pportdata *ppd, int index, int vl);
+u64 write_port_cntr(struct hfi1_pportdata *ppd, int index, int vl, u64 data);
+
+/* Per VL indexes */
+enum {
+ C_VL_0 = 0,
+ C_VL_1,
+ C_VL_2,
+ C_VL_3,
+ C_VL_4,
+ C_VL_5,
+ C_VL_6,
+ C_VL_7,
+ C_VL_15,
+ C_VL_COUNT
+};
+
+static inline int vl_from_idx(int idx)
+{
+ return (idx == C_VL_15 ? 15 : idx);
+}
+
+static inline int idx_from_vl(int vl)
+{
+ return (vl == 15 ? C_VL_15 : vl);
+}
+
+/* Per device counter indexes */
+enum {
+ C_RCV_OVF = 0,
+ C_RX_TID_FULL,
+ C_RX_TID_INVALID,
+ C_RX_TID_FLGMS,
+ C_RX_CTX_RHQS,
+ C_RX_CTX_EGRS,
+ C_RCV_TID_FLSMS,
+ C_CCE_PCI_CR_ST,
+ C_CCE_PCI_TR_ST,
+ C_CCE_PIO_WR_ST,
+ C_CCE_ERR_INT,
+ C_CCE_SDMA_INT,
+ C_CCE_MISC_INT,
+ C_CCE_RCV_AV_INT,
+ C_CCE_RCV_URG_INT,
+ C_CCE_SEND_CR_INT,
+ C_DC_UNC_ERR,
+ C_DC_RCV_ERR,
+ C_DC_FM_CFG_ERR,
+ C_DC_RMT_PHY_ERR,
+ C_DC_DROPPED_PKT,
+ C_DC_MC_XMIT_PKTS,
+ C_DC_MC_RCV_PKTS,
+ C_DC_XMIT_CERR,
+ C_DC_RCV_CERR,
+ C_DC_RCV_FCC,
+ C_DC_XMIT_FCC,
+ C_DC_XMIT_FLITS,
+ C_DC_RCV_FLITS,
+ C_DC_XMIT_PKTS,
+ C_DC_RCV_PKTS,
+ C_DC_RX_FLIT_VL,
+ C_DC_RX_PKT_VL,
+ C_DC_RCV_FCN,
+ C_DC_RCV_FCN_VL,
+ C_DC_RCV_BCN,
+ C_DC_RCV_BCN_VL,
+ C_DC_RCV_BBL,
+ C_DC_RCV_BBL_VL,
+ C_DC_MARK_FECN,
+ C_DC_MARK_FECN_VL,
+ C_DC_TOTAL_CRC,
+ C_DC_CRC_LN0,
+ C_DC_CRC_LN1,
+ C_DC_CRC_LN2,
+ C_DC_CRC_LN3,
+ C_DC_CRC_MULT_LN,
+ C_DC_TX_REPLAY,
+ C_DC_RX_REPLAY,
+ C_DC_SEQ_CRC_CNT,
+ C_DC_ESC0_ONLY_CNT,
+ C_DC_ESC0_PLUS1_CNT,
+ C_DC_ESC0_PLUS2_CNT,
+ C_DC_REINIT_FROM_PEER_CNT,
+ C_DC_SBE_CNT,
+ C_DC_MISC_FLG_CNT,
+ C_DC_PRF_GOOD_LTP_CNT,
+ C_DC_PRF_ACCEPTED_LTP_CNT,
+ C_DC_PRF_RX_FLIT_CNT,
+ C_DC_PRF_TX_FLIT_CNT,
+ C_DC_PRF_CLK_CNTR,
+ C_DC_PG_DBG_FLIT_CRDTS_CNT,
+ C_DC_PG_STS_PAUSE_COMPLETE_CNT,
+ C_DC_PG_STS_TX_SBE_CNT,
+ C_DC_PG_STS_TX_MBE_CNT,
+ C_SW_CPU_INTR,
+ C_SW_CPU_RCV_LIM,
+ C_SW_VTX_WAIT,
+ C_SW_PIO_WAIT,
+ C_SW_KMEM_WAIT,
+ DEV_CNTR_LAST /* Must be kept last */
+};
+
+/* Per port counter indexes */
+enum {
+ C_TX_UNSUP_VL = 0,
+ C_TX_INVAL_LEN,
+ C_TX_MM_LEN_ERR,
+ C_TX_UNDERRUN,
+ C_TX_FLOW_STALL,
+ C_TX_DROPPED,
+ C_TX_HDR_ERR,
+ C_TX_PKT,
+ C_TX_WORDS,
+ C_TX_WAIT,
+ C_TX_FLIT_VL,
+ C_TX_PKT_VL,
+ C_TX_WAIT_VL,
+ C_RX_PKT,
+ C_RX_WORDS,
+ C_SW_LINK_DOWN,
+ C_SW_LINK_UP,
+ C_SW_XMIT_DSCD,
+ C_SW_XMIT_DSCD_VL,
+ C_SW_XMIT_CSTR_ERR,
+ C_SW_RCV_CSTR_ERR,
+ C_SW_IBP_LOOP_PKTS,
+ C_SW_IBP_RC_RESENDS,
+ C_SW_IBP_RNR_NAKS,
+ C_SW_IBP_OTHER_NAKS,
+ C_SW_IBP_RC_TIMEOUTS,
+ C_SW_IBP_PKT_DROPS,
+ C_SW_IBP_DMA_WAIT,
+ C_SW_IBP_RC_SEQNAK,
+ C_SW_IBP_RC_DUPREQ,
+ C_SW_IBP_RDMA_SEQ,
+ C_SW_IBP_UNALIGNED,
+ C_SW_IBP_SEQ_NAK,
+ C_SW_CPU_RC_ACKS,
+ C_SW_CPU_RC_QACKS,
+ C_SW_CPU_RC_DELAYED_COMP,
+ C_RCV_HDR_OVF_0,
+ C_RCV_HDR_OVF_1,
+ C_RCV_HDR_OVF_2,
+ C_RCV_HDR_OVF_3,
+ C_RCV_HDR_OVF_4,
+ C_RCV_HDR_OVF_5,
+ C_RCV_HDR_OVF_6,
+ C_RCV_HDR_OVF_7,
+ C_RCV_HDR_OVF_8,
+ C_RCV_HDR_OVF_9,
+ C_RCV_HDR_OVF_10,
+ C_RCV_HDR_OVF_11,
+ C_RCV_HDR_OVF_12,
+ C_RCV_HDR_OVF_13,
+ C_RCV_HDR_OVF_14,
+ C_RCV_HDR_OVF_15,
+ C_RCV_HDR_OVF_16,
+ C_RCV_HDR_OVF_17,
+ C_RCV_HDR_OVF_18,
+ C_RCV_HDR_OVF_19,
+ C_RCV_HDR_OVF_20,
+ C_RCV_HDR_OVF_21,
+ C_RCV_HDR_OVF_22,
+ C_RCV_HDR_OVF_23,
+ C_RCV_HDR_OVF_24,
+ C_RCV_HDR_OVF_25,
+ C_RCV_HDR_OVF_26,
+ C_RCV_HDR_OVF_27,
+ C_RCV_HDR_OVF_28,
+ C_RCV_HDR_OVF_29,
+ C_RCV_HDR_OVF_30,
+ C_RCV_HDR_OVF_31,
+ C_RCV_HDR_OVF_32,
+ C_RCV_HDR_OVF_33,
+ C_RCV_HDR_OVF_34,
+ C_RCV_HDR_OVF_35,
+ C_RCV_HDR_OVF_36,
+ C_RCV_HDR_OVF_37,
+ C_RCV_HDR_OVF_38,
+ C_RCV_HDR_OVF_39,
+ C_RCV_HDR_OVF_40,
+ C_RCV_HDR_OVF_41,
+ C_RCV_HDR_OVF_42,
+ C_RCV_HDR_OVF_43,
+ C_RCV_HDR_OVF_44,
+ C_RCV_HDR_OVF_45,
+ C_RCV_HDR_OVF_46,
+ C_RCV_HDR_OVF_47,
+ C_RCV_HDR_OVF_48,
+ C_RCV_HDR_OVF_49,
+ C_RCV_HDR_OVF_50,
+ C_RCV_HDR_OVF_51,
+ C_RCV_HDR_OVF_52,
+ C_RCV_HDR_OVF_53,
+ C_RCV_HDR_OVF_54,
+ C_RCV_HDR_OVF_55,
+ C_RCV_HDR_OVF_56,
+ C_RCV_HDR_OVF_57,
+ C_RCV_HDR_OVF_58,
+ C_RCV_HDR_OVF_59,
+ C_RCV_HDR_OVF_60,
+ C_RCV_HDR_OVF_61,
+ C_RCV_HDR_OVF_62,
+ C_RCV_HDR_OVF_63,
+ C_RCV_HDR_OVF_64,
+ C_RCV_HDR_OVF_65,
+ C_RCV_HDR_OVF_66,
+ C_RCV_HDR_OVF_67,
+ C_RCV_HDR_OVF_68,
+ C_RCV_HDR_OVF_69,
+ C_RCV_HDR_OVF_70,
+ C_RCV_HDR_OVF_71,
+ C_RCV_HDR_OVF_72,
+ C_RCV_HDR_OVF_73,
+ C_RCV_HDR_OVF_74,
+ C_RCV_HDR_OVF_75,
+ C_RCV_HDR_OVF_76,
+ C_RCV_HDR_OVF_77,
+ C_RCV_HDR_OVF_78,
+ C_RCV_HDR_OVF_79,
+ C_RCV_HDR_OVF_80,
+ C_RCV_HDR_OVF_81,
+ C_RCV_HDR_OVF_82,
+ C_RCV_HDR_OVF_83,
+ C_RCV_HDR_OVF_84,
+ C_RCV_HDR_OVF_85,
+ C_RCV_HDR_OVF_86,
+ C_RCV_HDR_OVF_87,
+ C_RCV_HDR_OVF_88,
+ C_RCV_HDR_OVF_89,
+ C_RCV_HDR_OVF_90,
+ C_RCV_HDR_OVF_91,
+ C_RCV_HDR_OVF_92,
+ C_RCV_HDR_OVF_93,
+ C_RCV_HDR_OVF_94,
+ C_RCV_HDR_OVF_95,
+ C_RCV_HDR_OVF_96,
+ C_RCV_HDR_OVF_97,
+ C_RCV_HDR_OVF_98,
+ C_RCV_HDR_OVF_99,
+ C_RCV_HDR_OVF_100,
+ C_RCV_HDR_OVF_101,
+ C_RCV_HDR_OVF_102,
+ C_RCV_HDR_OVF_103,
+ C_RCV_HDR_OVF_104,
+ C_RCV_HDR_OVF_105,
+ C_RCV_HDR_OVF_106,
+ C_RCV_HDR_OVF_107,
+ C_RCV_HDR_OVF_108,
+ C_RCV_HDR_OVF_109,
+ C_RCV_HDR_OVF_110,
+ C_RCV_HDR_OVF_111,
+ C_RCV_HDR_OVF_112,
+ C_RCV_HDR_OVF_113,
+ C_RCV_HDR_OVF_114,
+ C_RCV_HDR_OVF_115,
+ C_RCV_HDR_OVF_116,
+ C_RCV_HDR_OVF_117,
+ C_RCV_HDR_OVF_118,
+ C_RCV_HDR_OVF_119,
+ C_RCV_HDR_OVF_120,
+ C_RCV_HDR_OVF_121,
+ C_RCV_HDR_OVF_122,
+ C_RCV_HDR_OVF_123,
+ C_RCV_HDR_OVF_124,
+ C_RCV_HDR_OVF_125,
+ C_RCV_HDR_OVF_126,
+ C_RCV_HDR_OVF_127,
+ C_RCV_HDR_OVF_128,
+ C_RCV_HDR_OVF_129,
+ C_RCV_HDR_OVF_130,
+ C_RCV_HDR_OVF_131,
+ C_RCV_HDR_OVF_132,
+ C_RCV_HDR_OVF_133,
+ C_RCV_HDR_OVF_134,
+ C_RCV_HDR_OVF_135,
+ C_RCV_HDR_OVF_136,
+ C_RCV_HDR_OVF_137,
+ C_RCV_HDR_OVF_138,
+ C_RCV_HDR_OVF_139,
+ C_RCV_HDR_OVF_140,
+ C_RCV_HDR_OVF_141,
+ C_RCV_HDR_OVF_142,
+ C_RCV_HDR_OVF_143,
+ C_RCV_HDR_OVF_144,
+ C_RCV_HDR_OVF_145,
+ C_RCV_HDR_OVF_146,
+ C_RCV_HDR_OVF_147,
+ C_RCV_HDR_OVF_148,
+ C_RCV_HDR_OVF_149,
+ C_RCV_HDR_OVF_150,
+ C_RCV_HDR_OVF_151,
+ C_RCV_HDR_OVF_152,
+ C_RCV_HDR_OVF_153,
+ C_RCV_HDR_OVF_154,
+ C_RCV_HDR_OVF_155,
+ C_RCV_HDR_OVF_156,
+ C_RCV_HDR_OVF_157,
+ C_RCV_HDR_OVF_158,
+ C_RCV_HDR_OVF_159,
+ PORT_CNTR_LAST /* Must be kept last */
+};
+
+u64 get_all_cpu_total(u64 __percpu *cntr);
+void hfi1_start_cleanup(struct hfi1_devdata *dd);
+void hfi1_clear_tids(struct hfi1_ctxtdata *rcd);
+struct hfi1_message_header *hfi1_get_msgheader(
+ struct hfi1_devdata *dd, __le32 *rhf_addr);
+int hfi1_get_base_kinfo(struct hfi1_ctxtdata *rcd,
+ struct hfi1_ctxt_info *kinfo);
+u64 hfi1_gpio_mod(struct hfi1_devdata *dd, u32 target, u32 data, u32 dir,
+ u32 mask);
+int hfi1_init_ctxt(struct send_context *sc);
+void hfi1_put_tid(struct hfi1_devdata *dd, u32 index,
+ u32 type, unsigned long pa, u16 order);
+void hfi1_quiet_serdes(struct hfi1_pportdata *ppd);
+void hfi1_rcvctrl(struct hfi1_devdata *dd, unsigned int op, int ctxt);
+u32 hfi1_read_cntrs(struct hfi1_devdata *dd, loff_t pos, char **namep,
+ u64 **cntrp);
+u32 hfi1_read_portcntrs(struct hfi1_devdata *dd, loff_t pos, u32 port,
+ char **namep, u64 **cntrp);
+u8 hfi1_ibphys_portstate(struct hfi1_pportdata *ppd);
+int hfi1_get_ib_cfg(struct hfi1_pportdata *ppd, int which);
+int hfi1_set_ib_cfg(struct hfi1_pportdata *ppd, int which, u32 val);
+int hfi1_set_ctxt_jkey(struct hfi1_devdata *dd, unsigned ctxt, u16 jkey);
+int hfi1_clear_ctxt_jkey(struct hfi1_devdata *dd, unsigned ctxt);
+int hfi1_set_ctxt_pkey(struct hfi1_devdata *dd, unsigned ctxt, u16 pkey);
+int hfi1_clear_ctxt_pkey(struct hfi1_devdata *dd, unsigned ctxt);
+void hfi1_read_link_quality(struct hfi1_devdata *dd, u8 *link_quality);
+
+/*
+ * Interrupt source table.
+ *
+ * Each entry is an interrupt source "type". It is ordered by increasing
+ * number.
+ */
+struct is_table {
+ int start; /* interrupt source type start */
+ int end; /* interrupt source type end */
+ /* routine that returns the name of the interrupt source */
+ char *(*is_name)(char *name, size_t size, unsigned int source);
+ /* routine to call when receiving an interrupt */
+ void (*is_int)(struct hfi1_devdata *dd, unsigned int source);
+};
+
+#endif /* _CHIP_H */
diff --git a/drivers/staging/rdma/hfi1/chip_registers.h b/drivers/staging/rdma/hfi1/chip_registers.h
new file mode 100644
index 0000000..6521030
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/chip_registers.h
@@ -0,0 +1,1289 @@
+#ifndef DEF_CHIP_REG
+#define DEF_CHIP_REG
+
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#define CORE 0x000000000000
+#define CCE (CORE + 0x000000000000)
+#define ASIC (CORE + 0x000000400000)
+#define MISC (CORE + 0x000000500000)
+#define DC_TOP_CSRS (CORE + 0x000000600000)
+#define CHIP_DEBUG (CORE + 0x000000700000)
+#define RXE (CORE + 0x000001000000)
+#define TXE (CORE + 0x000001800000)
+#define DCC_CSRS (DC_TOP_CSRS + 0x000000000000)
+#define DC_LCB_CSRS (DC_TOP_CSRS + 0x000000001000)
+#define DC_8051_CSRS (DC_TOP_CSRS + 0x000000002000)
+#define PCIE 0
+
+#define ASIC_NUM_SCRATCH 4
+#define CCE_ERR_INT_CNT 0
+#define CCE_MISC_INT_CNT 2
+#define CCE_NUM_32_BIT_COUNTERS 3
+#define CCE_NUM_32_BIT_INT_COUNTERS 6
+#define CCE_NUM_INT_CSRS 12
+#define CCE_NUM_INT_MAP_CSRS 96
+#define CCE_NUM_MSIX_PBAS 4
+#define CCE_NUM_MSIX_VECTORS 256
+#define CCE_NUM_SCRATCH 4
+#define CCE_PCIE_POSTED_CRDT_STALL_CNT 2
+#define CCE_PCIE_TRGT_STALL_CNT 0
+#define CCE_PIO_WR_STALL_CNT 1
+#define CCE_RCV_AVAIL_INT_CNT 3
+#define CCE_RCV_URGENT_INT_CNT 4
+#define CCE_SDMA_INT_CNT 1
+#define CCE_SEND_CREDIT_INT_CNT 5
+#define DCC_CFG_LED_CNTRL (DCC_CSRS + 0x000000000040)
+#define DCC_CFG_LED_CNTRL_LED_CNTRL_SMASK 0x10ull
+#define DCC_CFG_LED_CNTRL_LED_SW_BLINK_RATE_SHIFT 0
+#define DCC_CFG_LED_CNTRL_LED_SW_BLINK_RATE_SMASK 0xFull
+#define DCC_CFG_PORT_CONFIG (DCC_CSRS + 0x000000000008)
+#define DCC_CFG_PORT_CONFIG1 (DCC_CSRS + 0x000000000010)
+#define DCC_CFG_PORT_CONFIG1_DLID_MASK_MASK 0xFFFFull
+#define DCC_CFG_PORT_CONFIG1_DLID_MASK_SHIFT 16
+#define DCC_CFG_PORT_CONFIG1_DLID_MASK_SMASK 0xFFFF0000ull
+#define DCC_CFG_PORT_CONFIG1_TARGET_DLID_MASK 0xFFFFull
+#define DCC_CFG_PORT_CONFIG1_TARGET_DLID_SHIFT 0
+#define DCC_CFG_PORT_CONFIG1_TARGET_DLID_SMASK 0xFFFFull
+#define DCC_CFG_PORT_CONFIG_LINK_STATE_MASK 0x7ull
+#define DCC_CFG_PORT_CONFIG_LINK_STATE_SHIFT 48
+#define DCC_CFG_PORT_CONFIG_LINK_STATE_SMASK 0x7000000000000ull
+#define DCC_CFG_PORT_CONFIG_MTU_CAP_MASK 0x7ull
+#define DCC_CFG_PORT_CONFIG_MTU_CAP_SHIFT 32
+#define DCC_CFG_PORT_CONFIG_MTU_CAP_SMASK 0x700000000ull
+#define DCC_CFG_RESET (DCC_CSRS + 0x000000000000)
+#define DCC_CFG_RESET_RESET_LCB_SHIFT 0
+#define DCC_CFG_RESET_RESET_RX_FPE_SHIFT 2
+#define DCC_CFG_SC_VL_TABLE_15_0 (DCC_CSRS + 0x000000000028)
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY0_SHIFT 0
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY10_SHIFT 40
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY11_SHIFT 44
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY12_SHIFT 48
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY13_SHIFT 52
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY14_SHIFT 56
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY15_SHIFT 60
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY1_SHIFT 4
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY2_SHIFT 8
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY3_SHIFT 12
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY4_SHIFT 16
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY5_SHIFT 20
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY6_SHIFT 24
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY7_SHIFT 28
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY8_SHIFT 32
+#define DCC_CFG_SC_VL_TABLE_15_0_ENTRY9_SHIFT 36
+#define DCC_CFG_SC_VL_TABLE_31_16 (DCC_CSRS + 0x000000000030)
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY16_SHIFT 0
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY17_SHIFT 4
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY18_SHIFT 8
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY19_SHIFT 12
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY20_SHIFT 16
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY21_SHIFT 20
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY22_SHIFT 24
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY23_SHIFT 28
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY24_SHIFT 32
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY25_SHIFT 36
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY26_SHIFT 40
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY27_SHIFT 44
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY28_SHIFT 48
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY29_SHIFT 52
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY30_SHIFT 56
+#define DCC_CFG_SC_VL_TABLE_31_16_ENTRY31_SHIFT 60
+#define DCC_ERR_DROPPED_PKT_CNT (DCC_CSRS + 0x000000000120)
+#define DCC_ERR_FLG (DCC_CSRS + 0x000000000050)
+#define DCC_ERR_FLG_BAD_CRDT_ACK_ERR_SMASK 0x4000ull
+#define DCC_ERR_FLG_BAD_CTRL_DIST_ERR_SMASK 0x200000ull
+#define DCC_ERR_FLG_BAD_CTRL_FLIT_ERR_SMASK 0x10000ull
+#define DCC_ERR_FLG_BAD_DLID_TARGET_ERR_SMASK 0x200ull
+#define DCC_ERR_FLG_BAD_HEAD_DIST_ERR_SMASK 0x800000ull
+#define DCC_ERR_FLG_BAD_L2_ERR_SMASK 0x2ull
+#define DCC_ERR_FLG_BAD_LVER_ERR_SMASK 0x400ull
+#define DCC_ERR_FLG_BAD_MID_TAIL_ERR_SMASK 0x8ull
+#define DCC_ERR_FLG_BAD_PKT_LENGTH_ERR_SMASK 0x4000000ull
+#define DCC_ERR_FLG_BAD_PREEMPTION_ERR_SMASK 0x10ull
+#define DCC_ERR_FLG_BAD_SC_ERR_SMASK 0x4ull
+#define DCC_ERR_FLG_BAD_TAIL_DIST_ERR_SMASK 0x400000ull
+#define DCC_ERR_FLG_BAD_VL_MARKER_ERR_SMASK 0x80ull
+#define DCC_ERR_FLG_CLR (DCC_CSRS + 0x000000000060)
+#define DCC_ERR_FLG_CSR_ACCESS_BLOCKED_HOST_SMASK 0x8000000000ull
+#define DCC_ERR_FLG_CSR_ACCESS_BLOCKED_UC_SMASK 0x10000000000ull
+#define DCC_ERR_FLG_CSR_INVAL_ADDR_SMASK 0x400000000000ull
+#define DCC_ERR_FLG_CSR_PARITY_ERR_SMASK 0x200000000000ull
+#define DCC_ERR_FLG_DLID_ZERO_ERR_SMASK 0x40000000ull
+#define DCC_ERR_FLG_EN (DCC_CSRS + 0x000000000058)
+#define DCC_ERR_FLG_EN_CSR_ACCESS_BLOCKED_HOST_SMASK 0x8000000000ull
+#define DCC_ERR_FLG_EN_CSR_ACCESS_BLOCKED_UC_SMASK 0x10000000000ull
+#define DCC_ERR_FLG_EVENT_CNTR_PARITY_ERR_SMASK 0x20000ull
+#define DCC_ERR_FLG_EVENT_CNTR_ROLLOVER_ERR_SMASK 0x40000ull
+#define DCC_ERR_FLG_FMCONFIG_ERR_SMASK 0x40000000000000ull
+#define DCC_ERR_FLG_FPE_TX_FIFO_OVFLW_ERR_SMASK 0x2000000000ull
+#define DCC_ERR_FLG_FPE_TX_FIFO_UNFLW_ERR_SMASK 0x4000000000ull
+#define DCC_ERR_FLG_LATE_EBP_ERR_SMASK 0x1000000000ull
+#define DCC_ERR_FLG_LATE_LONG_ERR_SMASK 0x800000000ull
+#define DCC_ERR_FLG_LATE_SHORT_ERR_SMASK 0x400000000ull
+#define DCC_ERR_FLG_LENGTH_MTU_ERR_SMASK 0x80000000ull
+#define DCC_ERR_FLG_LINK_ERR_SMASK 0x80000ull
+#define DCC_ERR_FLG_MISC_CNTR_ROLLOVER_ERR_SMASK 0x100000ull
+#define DCC_ERR_FLG_NONVL15_STATE_ERR_SMASK 0x1000000ull
+#define DCC_ERR_FLG_PERM_NVL15_ERR_SMASK 0x10000000ull
+#define DCC_ERR_FLG_PREEMPTION_ERR_SMASK 0x20ull
+#define DCC_ERR_FLG_PREEMPTIONVL15_ERR_SMASK 0x40ull
+#define DCC_ERR_FLG_RCVPORT_ERR_SMASK 0x80000000000000ull
+#define DCC_ERR_FLG_RX_BYTE_SHFT_PARITY_ERR_SMASK 0x1000000000000ull
+#define DCC_ERR_FLG_RX_CTRL_PARITY_MBE_ERR_SMASK 0x100000000000ull
+#define DCC_ERR_FLG_RX_EARLY_DROP_ERR_SMASK 0x200000000ull
+#define DCC_ERR_FLG_SLID_ZERO_ERR_SMASK 0x20000000ull
+#define DCC_ERR_FLG_TX_BYTE_SHFT_PARITY_ERR_SMASK 0x800000000000ull
+#define DCC_ERR_FLG_TX_CTRL_PARITY_ERR_SMASK 0x20000000000ull
+#define DCC_ERR_FLG_TX_CTRL_PARITY_MBE_ERR_SMASK 0x40000000000ull
+#define DCC_ERR_FLG_TX_SC_PARITY_ERR_SMASK 0x80000000000ull
+#define DCC_ERR_FLG_UNCORRECTABLE_ERR_SMASK 0x2000ull
+#define DCC_ERR_FLG_UNSUP_PKT_TYPE_SMASK 0x8000ull
+#define DCC_ERR_FLG_UNSUP_VL_ERR_SMASK 0x8000000ull
+#define DCC_ERR_FLG_VL15_MULTI_ERR_SMASK 0x2000000ull
+#define DCC_ERR_FMCONFIG_ERR_CNT (DCC_CSRS + 0x000000000110)
+#define DCC_ERR_INFO_FMCONFIG (DCC_CSRS + 0x000000000090)
+#define DCC_ERR_INFO_PORTRCV (DCC_CSRS + 0x000000000078)
+#define DCC_ERR_INFO_PORTRCV_HDR0 (DCC_CSRS + 0x000000000080)
+#define DCC_ERR_INFO_PORTRCV_HDR1 (DCC_CSRS + 0x000000000088)
+#define DCC_ERR_INFO_UNCORRECTABLE (DCC_CSRS + 0x000000000098)
+#define DCC_ERR_PORTRCV_ERR_CNT (DCC_CSRS + 0x000000000108)
+#define DCC_ERR_RCVREMOTE_PHY_ERR_CNT (DCC_CSRS + 0x000000000118)
+#define DCC_ERR_UNCORRECTABLE_CNT (DCC_CSRS + 0x000000000100)
+#define DCC_PRF_PORT_MARK_FECN_CNT (DCC_CSRS + 0x000000000330)
+#define DCC_PRF_PORT_RCV_BECN_CNT (DCC_CSRS + 0x000000000290)
+#define DCC_PRF_PORT_RCV_BUBBLE_CNT (DCC_CSRS + 0x0000000002E0)
+#define DCC_PRF_PORT_RCV_CORRECTABLE_CNT (DCC_CSRS + 0x000000000140)
+#define DCC_PRF_PORT_RCV_DATA_CNT (DCC_CSRS + 0x000000000198)
+#define DCC_PRF_PORT_RCV_FECN_CNT (DCC_CSRS + 0x000000000240)
+#define DCC_PRF_PORT_RCV_MULTICAST_PKT_CNT (DCC_CSRS + 0x000000000130)
+#define DCC_PRF_PORT_RCV_PKTS_CNT (DCC_CSRS + 0x0000000001A8)
+#define DCC_PRF_PORT_VL_MARK_FECN_CNT (DCC_CSRS + 0x000000000338)
+#define DCC_PRF_PORT_VL_RCV_BECN_CNT (DCC_CSRS + 0x000000000298)
+#define DCC_PRF_PORT_VL_RCV_BUBBLE_CNT (DCC_CSRS + 0x0000000002E8)
+#define DCC_PRF_PORT_VL_RCV_DATA_CNT (DCC_CSRS + 0x0000000001B0)
+#define DCC_PRF_PORT_VL_RCV_FECN_CNT (DCC_CSRS + 0x000000000248)
+#define DCC_PRF_PORT_VL_RCV_PKTS_CNT (DCC_CSRS + 0x0000000001F8)
+#define DCC_PRF_PORT_XMIT_CORRECTABLE_CNT (DCC_CSRS + 0x000000000138)
+#define DCC_PRF_PORT_XMIT_DATA_CNT (DCC_CSRS + 0x000000000190)
+#define DCC_PRF_PORT_XMIT_MULTICAST_CNT (DCC_CSRS + 0x000000000128)
+#define DCC_PRF_PORT_XMIT_PKTS_CNT (DCC_CSRS + 0x0000000001A0)
+#define DCC_PRF_RX_FLOW_CRTL_CNT (DCC_CSRS + 0x000000000180)
+#define DCC_PRF_TX_FLOW_CRTL_CNT (DCC_CSRS + 0x000000000188)
+#define DC_DC8051_CFG_CSR_ACCESS_SEL (DC_8051_CSRS + 0x000000000110)
+#define DC_DC8051_CFG_CSR_ACCESS_SEL_DCC_SMASK 0x2ull
+#define DC_DC8051_CFG_CSR_ACCESS_SEL_LCB_SMASK 0x1ull
+#define DC_DC8051_CFG_EXT_DEV_0 (DC_8051_CSRS + 0x000000000118)
+#define DC_DC8051_CFG_EXT_DEV_0_COMPLETED_SMASK 0x1ull
+#define DC_DC8051_CFG_EXT_DEV_0_RETURN_CODE_SHIFT 8
+#define DC_DC8051_CFG_EXT_DEV_0_RSP_DATA_SHIFT 16
+#define DC_DC8051_CFG_EXT_DEV_1 (DC_8051_CSRS + 0x000000000120)
+#define DC_DC8051_CFG_EXT_DEV_1_REQ_DATA_MASK 0xFFFFull
+#define DC_DC8051_CFG_EXT_DEV_1_REQ_DATA_SHIFT 16
+#define DC_DC8051_CFG_EXT_DEV_1_REQ_DATA_SMASK 0xFFFF0000ull
+#define DC_DC8051_CFG_EXT_DEV_1_REQ_NEW_SMASK 0x1ull
+#define DC_DC8051_CFG_EXT_DEV_1_REQ_TYPE_MASK 0xFFull
+#define DC_DC8051_CFG_EXT_DEV_1_REQ_TYPE_SHIFT 8
+#define DC_DC8051_CFG_HOST_CMD_0 (DC_8051_CSRS + 0x000000000028)
+#define DC_DC8051_CFG_HOST_CMD_0_REQ_DATA_MASK 0xFFFFFFFFFFFFull
+#define DC_DC8051_CFG_HOST_CMD_0_REQ_DATA_SHIFT 16
+#define DC_DC8051_CFG_HOST_CMD_0_REQ_NEW_SMASK 0x1ull
+#define DC_DC8051_CFG_HOST_CMD_0_REQ_TYPE_MASK 0xFFull
+#define DC_DC8051_CFG_HOST_CMD_0_REQ_TYPE_SHIFT 8
+#define DC_DC8051_CFG_HOST_CMD_1 (DC_8051_CSRS + 0x000000000030)
+#define DC_DC8051_CFG_HOST_CMD_1_COMPLETED_SMASK 0x1ull
+#define DC_DC8051_CFG_HOST_CMD_1_RETURN_CODE_MASK 0xFFull
+#define DC_DC8051_CFG_HOST_CMD_1_RETURN_CODE_SHIFT 8
+#define DC_DC8051_CFG_HOST_CMD_1_RSP_DATA_MASK 0xFFFFFFFFFFFFull
+#define DC_DC8051_CFG_HOST_CMD_1_RSP_DATA_SHIFT 16
+#define DC_DC8051_CFG_LOCAL_GUID (DC_8051_CSRS + 0x000000000038)
+#define DC_DC8051_CFG_MODE (DC_8051_CSRS + 0x000000000070)
+#define DC_DC8051_CFG_RAM_ACCESS_CTRL (DC_8051_CSRS + 0x000000000008)
+#define DC_DC8051_CFG_RAM_ACCESS_CTRL_ADDRESS_MASK 0x7FFFull
+#define DC_DC8051_CFG_RAM_ACCESS_CTRL_ADDRESS_SHIFT 0
+#define DC_DC8051_CFG_RAM_ACCESS_CTRL_WRITE_ENA_SMASK 0x1000000ull
+#define DC_DC8051_CFG_RAM_ACCESS_CTRL_READ_ENA_SMASK 0x10000ull
+#define DC_DC8051_CFG_RAM_ACCESS_SETUP (DC_8051_CSRS + 0x000000000000)
+#define DC_DC8051_CFG_RAM_ACCESS_SETUP_AUTO_INCR_ADDR_SMASK 0x100ull
+#define DC_DC8051_CFG_RAM_ACCESS_SETUP_RAM_SEL_SMASK 0x1ull
+#define DC_DC8051_CFG_RAM_ACCESS_STATUS (DC_8051_CSRS + 0x000000000018)
+#define DC_DC8051_CFG_RAM_ACCESS_STATUS_ACCESS_COMPLETED_SMASK 0x10000ull
+#define DC_DC8051_CFG_RAM_ACCESS_WR_DATA (DC_8051_CSRS + 0x000000000010)
+#define DC_DC8051_CFG_RAM_ACCESS_RD_DATA (DC_8051_CSRS + 0x000000000020)
+#define DC_DC8051_CFG_RST (DC_8051_CSRS + 0x000000000068)
+#define DC_DC8051_CFG_RST_CRAM_SMASK 0x2ull
+#define DC_DC8051_CFG_RST_DRAM_SMASK 0x4ull
+#define DC_DC8051_CFG_RST_IRAM_SMASK 0x8ull
+#define DC_DC8051_CFG_RST_M8051W_SMASK 0x1ull
+#define DC_DC8051_CFG_RST_SFR_SMASK 0x10ull
+#define DC_DC8051_DBG_ERR_INFO_SET_BY_8051 (DC_8051_CSRS + 0x0000000000D8)
+#define DC_DC8051_DBG_ERR_INFO_SET_BY_8051_ERROR_MASK 0xFFFFFFFFull
+#define DC_DC8051_DBG_ERR_INFO_SET_BY_8051_ERROR_SHIFT 16
+#define DC_DC8051_DBG_ERR_INFO_SET_BY_8051_HOST_MSG_MASK 0xFFFFull
+#define DC_DC8051_DBG_ERR_INFO_SET_BY_8051_HOST_MSG_SHIFT 0
+#define DC_DC8051_ERR_CLR (DC_8051_CSRS + 0x0000000000E8)
+#define DC_DC8051_ERR_EN (DC_8051_CSRS + 0x0000000000F0)
+#define DC_DC8051_ERR_EN_LOST_8051_HEART_BEAT_SMASK 0x2ull
+#define DC_DC8051_ERR_FLG (DC_8051_CSRS + 0x0000000000E0)
+#define DC_DC8051_ERR_FLG_CRAM_MBE_SMASK 0x4ull
+#define DC_DC8051_ERR_FLG_CRAM_SBE_SMASK 0x8ull
+#define DC_DC8051_ERR_FLG_DRAM_MBE_SMASK 0x10ull
+#define DC_DC8051_ERR_FLG_DRAM_SBE_SMASK 0x20ull
+#define DC_DC8051_ERR_FLG_INVALID_CSR_ADDR_SMASK 0x400ull
+#define DC_DC8051_ERR_FLG_IRAM_MBE_SMASK 0x40ull
+#define DC_DC8051_ERR_FLG_IRAM_SBE_SMASK 0x80ull
+#define DC_DC8051_ERR_FLG_LOST_8051_HEART_BEAT_SMASK 0x2ull
+#define DC_DC8051_ERR_FLG_SET_BY_8051_SMASK 0x1ull
+#define DC_DC8051_ERR_FLG_UNMATCHED_SECURE_MSG_ACROSS_BCC_LANES_SMASK 0x100ull
+#define DC_DC8051_STS_CUR_STATE (DC_8051_CSRS + 0x000000000060)
+#define DC_DC8051_STS_CUR_STATE_FIRMWARE_MASK 0xFFull
+#define DC_DC8051_STS_CUR_STATE_FIRMWARE_SHIFT 16
+#define DC_DC8051_STS_CUR_STATE_PORT_MASK 0xFFull
+#define DC_DC8051_STS_CUR_STATE_PORT_SHIFT 0
+#define DC_DC8051_STS_LOCAL_FM_SECURITY (DC_8051_CSRS + 0x000000000050)
+#define DC_DC8051_STS_LOCAL_FM_SECURITY_DISABLED_MASK 0x1ull
+#define DC_DC8051_STS_REMOTE_FM_SECURITY (DC_8051_CSRS + 0x000000000058)
+#define DC_DC8051_STS_REMOTE_GUID (DC_8051_CSRS + 0x000000000040)
+#define DC_DC8051_STS_REMOTE_NODE_TYPE (DC_8051_CSRS + 0x000000000048)
+#define DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK 0x3ull
+#define DC_DC8051_STS_REMOTE_PORT_NO (DC_8051_CSRS + 0x000000000130)
+#define DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK 0xFFull
+#define DC_LCB_CFG_ALLOW_LINK_UP (DC_LCB_CSRS + 0x000000000128)
+#define DC_LCB_CFG_ALLOW_LINK_UP_VAL_SHIFT 0
+#define DC_LCB_CFG_CRC_MODE (DC_LCB_CSRS + 0x000000000058)
+#define DC_LCB_CFG_CRC_MODE_TX_VAL_SHIFT 0
+#define DC_LCB_CFG_IGNORE_LOST_RCLK (DC_LCB_CSRS + 0x000000000020)
+#define DC_LCB_CFG_IGNORE_LOST_RCLK_EN_SMASK 0x1ull
+#define DC_LCB_CFG_LANE_WIDTH (DC_LCB_CSRS + 0x000000000100)
+#define DC_LCB_CFG_LINK_KILL_EN (DC_LCB_CSRS + 0x000000000120)
+#define DC_LCB_CFG_LINK_KILL_EN_FLIT_INPUT_BUF_MBE_SMASK 0x100000ull
+#define DC_LCB_CFG_LINK_KILL_EN_REPLAY_BUF_MBE_SMASK 0x400000ull
+#define DC_LCB_CFG_LN_DCLK (DC_LCB_CSRS + 0x000000000060)
+#define DC_LCB_CFG_LOOPBACK (DC_LCB_CSRS + 0x0000000000F8)
+#define DC_LCB_CFG_LOOPBACK_VAL_SHIFT 0
+#define DC_LCB_CFG_RUN (DC_LCB_CSRS + 0x000000000000)
+#define DC_LCB_CFG_RUN_EN_SHIFT 0
+#define DC_LCB_CFG_RX_FIFOS_RADR (DC_LCB_CSRS + 0x000000000018)
+#define DC_LCB_CFG_RX_FIFOS_RADR_DO_NOT_JUMP_VAL_SHIFT 8
+#define DC_LCB_CFG_RX_FIFOS_RADR_OK_TO_JUMP_VAL_SHIFT 4
+#define DC_LCB_CFG_RX_FIFOS_RADR_RST_VAL_SHIFT 0
+#define DC_LCB_CFG_TX_FIFOS_RADR (DC_LCB_CSRS + 0x000000000010)
+#define DC_LCB_CFG_TX_FIFOS_RADR_RST_VAL_SHIFT 0
+#define DC_LCB_CFG_TX_FIFOS_RESET (DC_LCB_CSRS + 0x000000000008)
+#define DC_LCB_CFG_TX_FIFOS_RESET_VAL_SHIFT 0
+#define DC_LCB_ERR_CLR (DC_LCB_CSRS + 0x000000000308)
+#define DC_LCB_ERR_EN (DC_LCB_CSRS + 0x000000000310)
+#define DC_LCB_ERR_FLG (DC_LCB_CSRS + 0x000000000300)
+#define DC_LCB_ERR_FLG_REDUNDANT_FLIT_PARITY_ERR_SMASK 0x20000000ull
+#define DC_LCB_ERR_FLG_NEG_EDGE_LINK_TRANSFER_ACTIVE_SMASK 0x10000000ull
+#define DC_LCB_ERR_FLG_HOLD_REINIT_SMASK 0x8000000ull
+#define DC_LCB_ERR_FLG_RST_FOR_INCOMPLT_RND_TRIP_SMASK 0x4000000ull
+#define DC_LCB_ERR_FLG_RST_FOR_LINK_TIMEOUT_SMASK 0x2000000ull
+#define DC_LCB_ERR_FLG_CREDIT_RETURN_FLIT_MBE_SMASK 0x1000000ull
+#define DC_LCB_ERR_FLG_REPLAY_BUF_SBE_SMASK 0x800000ull
+#define DC_LCB_ERR_FLG_REPLAY_BUF_MBE_SMASK 0x400000ull
+#define DC_LCB_ERR_FLG_FLIT_INPUT_BUF_SBE_SMASK 0x200000ull
+#define DC_LCB_ERR_FLG_FLIT_INPUT_BUF_MBE_SMASK 0x100000ull
+#define DC_LCB_ERR_FLG_VL_ACK_INPUT_WRONG_CRC_MODE_SMASK 0x80000ull
+#define DC_LCB_ERR_FLG_VL_ACK_INPUT_PARITY_ERR_SMASK 0x40000ull
+#define DC_LCB_ERR_FLG_VL_ACK_INPUT_BUF_OFLW_SMASK 0x20000ull
+#define DC_LCB_ERR_FLG_FLIT_INPUT_BUF_OFLW_SMASK 0x10000ull
+#define DC_LCB_ERR_FLG_ILLEGAL_FLIT_ENCODING_SMASK 0x8000ull
+#define DC_LCB_ERR_FLG_ILLEGAL_NULL_LTP_SMASK 0x4000ull
+#define DC_LCB_ERR_FLG_UNEXPECTED_ROUND_TRIP_MARKER_SMASK 0x2000ull
+#define DC_LCB_ERR_FLG_UNEXPECTED_REPLAY_MARKER_SMASK 0x1000ull
+#define DC_LCB_ERR_FLG_RCLK_STOPPED_SMASK 0x800ull
+#define DC_LCB_ERR_FLG_CRC_ERR_CNT_HIT_LIMIT_SMASK 0x400ull
+#define DC_LCB_ERR_FLG_REINIT_FOR_LN_DEGRADE_SMASK 0x200ull
+#define DC_LCB_ERR_FLG_REINIT_FROM_PEER_SMASK 0x100ull
+#define DC_LCB_ERR_FLG_SEQ_CRC_ERR_SMASK 0x80ull
+#define DC_LCB_ERR_FLG_RX_LESS_THAN_FOUR_LNS_SMASK 0x40ull
+#define DC_LCB_ERR_FLG_TX_LESS_THAN_FOUR_LNS_SMASK 0x20ull
+#define DC_LCB_ERR_FLG_LOST_REINIT_STALL_OR_TOS_SMASK 0x10ull
+#define DC_LCB_ERR_FLG_ALL_LNS_FAILED_REINIT_TEST_SMASK 0x8ull
+#define DC_LCB_ERR_FLG_RST_FOR_FAILED_DESKEW_SMASK 0x4ull
+#define DC_LCB_ERR_FLG_INVALID_CSR_ADDR_SMASK 0x2ull
+#define DC_LCB_ERR_FLG_CSR_PARITY_ERR_SMASK 0x1ull
+#define DC_LCB_ERR_INFO_CRC_ERR_LN0 (DC_LCB_CSRS + 0x000000000328)
+#define DC_LCB_ERR_INFO_CRC_ERR_LN1 (DC_LCB_CSRS + 0x000000000330)
+#define DC_LCB_ERR_INFO_CRC_ERR_LN2 (DC_LCB_CSRS + 0x000000000338)
+#define DC_LCB_ERR_INFO_CRC_ERR_LN3 (DC_LCB_CSRS + 0x000000000340)
+#define DC_LCB_ERR_INFO_CRC_ERR_MULTI_LN (DC_LCB_CSRS + 0x000000000348)
+#define DC_LCB_ERR_INFO_ESCAPE_0_ONLY_CNT (DC_LCB_CSRS + 0x000000000368)
+#define DC_LCB_ERR_INFO_ESCAPE_0_PLUS1_CNT (DC_LCB_CSRS + 0x000000000370)
+#define DC_LCB_ERR_INFO_ESCAPE_0_PLUS2_CNT (DC_LCB_CSRS + 0x000000000378)
+#define DC_LCB_ERR_INFO_MISC_FLG_CNT (DC_LCB_CSRS + 0x000000000390)
+#define DC_LCB_ERR_INFO_REINIT_FROM_PEER_CNT (DC_LCB_CSRS + 0x000000000380)
+#define DC_LCB_ERR_INFO_RX_REPLAY_CNT (DC_LCB_CSRS + 0x000000000358)
+#define DC_LCB_ERR_INFO_SBE_CNT (DC_LCB_CSRS + 0x000000000388)
+#define DC_LCB_ERR_INFO_SEQ_CRC_CNT (DC_LCB_CSRS + 0x000000000360)
+#define DC_LCB_ERR_INFO_TOTAL_CRC_ERR (DC_LCB_CSRS + 0x000000000320)
+#define DC_LCB_ERR_INFO_TX_REPLAY_CNT (DC_LCB_CSRS + 0x000000000350)
+#define DC_LCB_PG_DBG_FLIT_CRDTS_CNT (DC_LCB_CSRS + 0x000000000580)
+#define DC_LCB_PG_STS_PAUSE_COMPLETE_CNT (DC_LCB_CSRS + 0x0000000005F8)
+#define DC_LCB_PG_STS_TX_MBE_CNT (DC_LCB_CSRS + 0x000000000608)
+#define DC_LCB_PG_STS_TX_SBE_CNT (DC_LCB_CSRS + 0x000000000600)
+#define DC_LCB_PRF_ACCEPTED_LTP_CNT (DC_LCB_CSRS + 0x000000000408)
+#define DC_LCB_PRF_CLK_CNTR (DC_LCB_CSRS + 0x000000000420)
+#define DC_LCB_PRF_GOOD_LTP_CNT (DC_LCB_CSRS + 0x000000000400)
+#define DC_LCB_PRF_RX_FLIT_CNT (DC_LCB_CSRS + 0x000000000410)
+#define DC_LCB_PRF_TX_FLIT_CNT (DC_LCB_CSRS + 0x000000000418)
+#define DC_LCB_STS_LINK_TRANSFER_ACTIVE (DC_LCB_CSRS + 0x000000000468)
+#define DC_LCB_STS_ROUND_TRIP_LTP_CNT (DC_LCB_CSRS + 0x0000000004B0)
+#define RCV_BUF_OVFL_CNT 10
+#define RCV_CONTEXT_EGR_STALL 22
+#define RCV_CONTEXT_RHQ_STALL 21
+#define RCV_DATA_PKT_CNT 0
+#define RCV_DWORD_CNT 1
+#define RCV_TID_FLOW_GEN_MISMATCH_CNT 20
+#define RCV_TID_FLOW_SEQ_MISMATCH_CNT 23
+#define RCV_TID_FULL_ERR_CNT 18
+#define RCV_TID_VALID_ERR_CNT 19
+#define RXE_NUM_32_BIT_COUNTERS 24
+#define RXE_NUM_64_BIT_COUNTERS 2
+#define RXE_NUM_RSM_INSTANCES 4
+#define RXE_NUM_TID_FLOWS 32
+#define RXE_PER_CONTEXT_OFFSET 0x0300000
+#define SEND_DATA_PKT_CNT 0
+#define SEND_DATA_PKT_VL0_CNT 12
+#define SEND_DATA_VL0_CNT 3
+#define SEND_DROPPED_PKT_CNT 5
+#define SEND_DWORD_CNT 1
+#define SEND_FLOW_STALL_CNT 4
+#define SEND_HEADERS_ERR_CNT 6
+#define SEND_LEN_ERR_CNT 1
+#define SEND_MAX_MIN_LEN_ERR_CNT 2
+#define SEND_UNDERRUN_CNT 3
+#define SEND_UNSUP_VL_ERR_CNT 0
+#define SEND_WAIT_CNT 2
+#define SEND_WAIT_VL0_CNT 21
+#define TXE_PIO_SEND_OFFSET 0x0800000
+#define ASIC_CFG_DRV_STR (ASIC + 0x000000000048)
+#define ASIC_CFG_MUTEX (ASIC + 0x000000000040)
+#define ASIC_CFG_SBUS_EXECUTE (ASIC + 0x000000000008)
+#define ASIC_CFG_SBUS_EXECUTE_EXECUTE_SMASK 0x1ull
+#define ASIC_CFG_SBUS_EXECUTE_FAST_MODE_SMASK 0x2ull
+#define ASIC_CFG_SBUS_REQUEST (ASIC + 0x000000000000)
+#define ASIC_CFG_SBUS_REQUEST_COMMAND_SHIFT 16
+#define ASIC_CFG_SBUS_REQUEST_DATA_ADDR_SHIFT 8
+#define ASIC_CFG_SBUS_REQUEST_DATA_IN_SHIFT 32
+#define ASIC_CFG_SBUS_REQUEST_RECEIVER_ADDR_SHIFT 0
+#define ASIC_CFG_SCRATCH (ASIC + 0x000000000020)
+#define ASIC_CFG_THERM_POLL_EN (ASIC + 0x000000000050)
+#define ASIC_EEP_ADDR_CMD (ASIC + 0x000000000308)
+#define ASIC_EEP_ADDR_CMD_EP_ADDR_MASK 0xFFFFFFull
+#define ASIC_EEP_CTL_STAT (ASIC + 0x000000000300)
+#define ASIC_EEP_CTL_STAT_EP_RESET_SMASK 0x4ull
+#define ASIC_EEP_CTL_STAT_RATE_SPI_SHIFT 8
+#define ASIC_EEP_CTL_STAT_RESETCSR 0x0000000083818000ull
+#define ASIC_EEP_DATA (ASIC + 0x000000000310)
+#define ASIC_GPIO_CLEAR (ASIC + 0x000000000230)
+#define ASIC_GPIO_FORCE (ASIC + 0x000000000238)
+#define ASIC_GPIO_IN (ASIC + 0x000000000200)
+#define ASIC_GPIO_INVERT (ASIC + 0x000000000210)
+#define ASIC_GPIO_MASK (ASIC + 0x000000000220)
+#define ASIC_GPIO_OE (ASIC + 0x000000000208)
+#define ASIC_GPIO_OUT (ASIC + 0x000000000218)
+#define ASIC_PCIE_SD_HOST_CMD (ASIC + 0x000000000100)
+#define ASIC_PCIE_SD_HOST_CMD_INTRPT_CMD_SHIFT 0
+#define ASIC_PCIE_SD_HOST_CMD_SBR_MODE_SMASK 0x400ull
+#define ASIC_PCIE_SD_HOST_CMD_SBUS_RCVR_ADDR_SHIFT 2
+#define ASIC_PCIE_SD_HOST_CMD_TIMER_MASK 0xFFFFFull
+#define ASIC_PCIE_SD_HOST_CMD_TIMER_SHIFT 12
+#define ASIC_PCIE_SD_HOST_STATUS (ASIC + 0x000000000108)
+#define ASIC_PCIE_SD_HOST_STATUS_FW_DNLD_ERR_MASK 0x7ull
+#define ASIC_PCIE_SD_HOST_STATUS_FW_DNLD_ERR_SHIFT 2
+#define ASIC_PCIE_SD_HOST_STATUS_FW_DNLD_STS_MASK 0x3ull
+#define ASIC_PCIE_SD_HOST_STATUS_FW_DNLD_STS_SHIFT 0
+#define ASIC_PCIE_SD_INTRPT_DATA_CODE (ASIC + 0x000000000110)
+#define ASIC_PCIE_SD_INTRPT_ENABLE (ASIC + 0x000000000118)
+#define ASIC_PCIE_SD_INTRPT_LIST (ASIC + 0x000000000180)
+#define ASIC_PCIE_SD_INTRPT_LIST_INTRPT_CODE_SHIFT 16
+#define ASIC_PCIE_SD_INTRPT_LIST_INTRPT_DATA_SHIFT 0
+#define ASIC_PCIE_SD_INTRPT_STATUS (ASIC + 0x000000000128)
+#define ASIC_QSFP1_CLEAR (ASIC + 0x000000000270)
+#define ASIC_QSFP1_FORCE (ASIC + 0x000000000278)
+#define ASIC_QSFP1_IN (ASIC + 0x000000000240)
+#define ASIC_QSFP1_INVERT (ASIC + 0x000000000250)
+#define ASIC_QSFP1_MASK (ASIC + 0x000000000260)
+#define ASIC_QSFP1_OE (ASIC + 0x000000000248)
+#define ASIC_QSFP1_OUT (ASIC + 0x000000000258)
+#define ASIC_QSFP1_STATUS (ASIC + 0x000000000268)
+#define ASIC_QSFP2_CLEAR (ASIC + 0x0000000002B0)
+#define ASIC_QSFP2_FORCE (ASIC + 0x0000000002B8)
+#define ASIC_QSFP2_IN (ASIC + 0x000000000280)
+#define ASIC_QSFP2_INVERT (ASIC + 0x000000000290)
+#define ASIC_QSFP2_MASK (ASIC + 0x0000000002A0)
+#define ASIC_QSFP2_OE (ASIC + 0x000000000288)
+#define ASIC_QSFP2_OUT (ASIC + 0x000000000298)
+#define ASIC_QSFP2_STATUS (ASIC + 0x0000000002A8)
+#define ASIC_STS_SBUS_COUNTERS (ASIC + 0x000000000018)
+#define ASIC_STS_SBUS_COUNTERS_EXECUTE_CNT_MASK 0xFFFFull
+#define ASIC_STS_SBUS_COUNTERS_EXECUTE_CNT_SHIFT 0
+#define ASIC_STS_SBUS_COUNTERS_RCV_DATA_VALID_CNT_MASK 0xFFFFull
+#define ASIC_STS_SBUS_COUNTERS_RCV_DATA_VALID_CNT_SHIFT 16
+#define ASIC_STS_SBUS_RESULT (ASIC + 0x000000000010)
+#define ASIC_STS_SBUS_RESULT_DONE_SMASK 0x1ull
+#define ASIC_STS_SBUS_RESULT_RCV_DATA_VALID_SMASK 0x2ull
+#define ASIC_STS_THERM (ASIC + 0x000000000058)
+#define ASIC_STS_THERM_CRIT_TEMP_MASK 0x7FFull
+#define ASIC_STS_THERM_CRIT_TEMP_SHIFT 18
+#define ASIC_STS_THERM_CURR_TEMP_MASK 0x7FFull
+#define ASIC_STS_THERM_CURR_TEMP_SHIFT 2
+#define ASIC_STS_THERM_HI_TEMP_MASK 0x7FFull
+#define ASIC_STS_THERM_HI_TEMP_SHIFT 50
+#define ASIC_STS_THERM_LO_TEMP_MASK 0x7FFull
+#define ASIC_STS_THERM_LO_TEMP_SHIFT 34
+#define ASIC_STS_THERM_LOW_SHIFT 13
+#define CCE_COUNTER_ARRAY32 (CCE + 0x000000000060)
+#define CCE_CTRL (CCE + 0x000000000010)
+#define CCE_CTRL_RXE_RESUME_SMASK 0x800ull
+#define CCE_CTRL_SPC_FREEZE_SMASK 0x100ull
+#define CCE_CTRL_SPC_UNFREEZE_SMASK 0x200ull
+#define CCE_CTRL_TXE_RESUME_SMASK 0x2000ull
+#define CCE_DC_CTRL (CCE + 0x0000000000B8)
+#define CCE_DC_CTRL_DC_RESET_SMASK 0x1ull
+#define CCE_DC_CTRL_RESETCSR 0x0000000000000001ull
+#define CCE_ERR_CLEAR (CCE + 0x000000000050)
+#define CCE_ERR_MASK (CCE + 0x000000000048)
+#define CCE_ERR_STATUS (CCE + 0x000000000040)
+#define CCE_ERR_STATUS_CCE_CLI0_ASYNC_FIFO_PARITY_ERR_SMASK 0x40ull
+#define CCE_ERR_STATUS_CCE_CLI1_ASYNC_FIFO_DBG_PARITY_ERROR_SMASK 0x1000ull
+#define CCE_ERR_STATUS_CCE_CLI1_ASYNC_FIFO_PIO_CRDT_PARITY_ERR_SMASK \
+ 0x200ull
+#define CCE_ERR_STATUS_CCE_CLI1_ASYNC_FIFO_RXDMA_PARITY_ERROR_SMASK \
+ 0x800ull
+#define CCE_ERR_STATUS_CCE_CLI1_ASYNC_FIFO_SDMA_HD_PARITY_ERR_SMASK \
+ 0x400ull
+#define CCE_ERR_STATUS_CCE_CLI2_ASYNC_FIFO_PARITY_ERR_SMASK 0x100ull
+#define CCE_ERR_STATUS_CCE_CSR_CFG_BUS_PARITY_ERR_SMASK 0x80ull
+#define CCE_ERR_STATUS_CCE_CSR_PARITY_ERR_SMASK 0x1ull
+#define CCE_ERR_STATUS_CCE_CSR_READ_BAD_ADDR_ERR_SMASK 0x2ull
+#define CCE_ERR_STATUS_CCE_CSR_WRITE_BAD_ADDR_ERR_SMASK 0x4ull
+#define CCE_ERR_STATUS_CCE_INT_MAP_COR_ERR_SMASK 0x4000000000ull
+#define CCE_ERR_STATUS_CCE_INT_MAP_UNC_ERR_SMASK 0x8000000000ull
+#define CCE_ERR_STATUS_CCE_MSIX_CSR_PARITY_ERR_SMASK 0x10000000000ull
+#define CCE_ERR_STATUS_CCE_MSIX_TABLE_COR_ERR_SMASK 0x1000000000ull
+#define CCE_ERR_STATUS_CCE_MSIX_TABLE_UNC_ERR_SMASK 0x2000000000ull
+#define CCE_ERR_STATUS_CCE_RCPL_ASYNC_FIFO_PARITY_ERR_SMASK 0x400000000ull
+#define CCE_ERR_STATUS_CCE_RSPD_DATA_PARITY_ERR_SMASK 0x20ull
+#define CCE_ERR_STATUS_CCE_RXDMA_CONV_FIFO_PARITY_ERR_SMASK 0x800000000ull
+#define CCE_ERR_STATUS_CCE_SEG_READ_BAD_ADDR_ERR_SMASK 0x100000000ull
+#define CCE_ERR_STATUS_CCE_SEG_WRITE_BAD_ADDR_ERR_SMASK 0x200000000ull
+#define CCE_ERR_STATUS_CCE_TRGT_ACCESS_ERR_SMASK 0x10ull
+#define CCE_ERR_STATUS_CCE_TRGT_ASYNC_FIFO_PARITY_ERR_SMASK 0x8ull
+#define CCE_ERR_STATUS_CCE_TRGT_CPL_TIMEOUT_ERR_SMASK 0x40000000ull
+#define CCE_ERR_STATUS_LA_TRIGGERED_SMASK 0x80000000ull
+#define CCE_ERR_STATUS_PCIC_CPL_DAT_QCOR_ERR_SMASK 0x40000ull
+#define CCE_ERR_STATUS_PCIC_CPL_DAT_QUNC_ERR_SMASK 0x4000000ull
+#define CCE_ERR_STATUS_PCIC_CPL_HD_QCOR_ERR_SMASK 0x20000ull
+#define CCE_ERR_STATUS_PCIC_CPL_HD_QUNC_ERR_SMASK 0x2000000ull
+#define CCE_ERR_STATUS_PCIC_NPOST_DAT_QPARITY_ERR_SMASK 0x100000ull
+#define CCE_ERR_STATUS_PCIC_NPOST_HQ_PARITY_ERR_SMASK 0x80000ull
+#define CCE_ERR_STATUS_PCIC_POST_DAT_QCOR_ERR_SMASK 0x10000ull
+#define CCE_ERR_STATUS_PCIC_POST_DAT_QUNC_ERR_SMASK 0x1000000ull
+#define CCE_ERR_STATUS_PCIC_POST_HD_QCOR_ERR_SMASK 0x8000ull
+#define CCE_ERR_STATUS_PCIC_POST_HD_QUNC_ERR_SMASK 0x800000ull
+#define CCE_ERR_STATUS_PCIC_RECEIVE_PARITY_ERR_SMASK 0x20000000ull
+#define CCE_ERR_STATUS_PCIC_RETRY_MEM_COR_ERR_SMASK 0x2000ull
+#define CCE_ERR_STATUS_PCIC_RETRY_MEM_UNC_ERR_SMASK 0x200000ull
+#define CCE_ERR_STATUS_PCIC_RETRY_SOT_MEM_COR_ERR_SMASK 0x4000ull
+#define CCE_ERR_STATUS_PCIC_RETRY_SOT_MEM_UNC_ERR_SMASK 0x400000ull
+#define CCE_ERR_STATUS_PCIC_TRANSMIT_BACK_PARITY_ERR_SMASK 0x10000000ull
+#define CCE_ERR_STATUS_PCIC_TRANSMIT_FRONT_PARITY_ERR_SMASK 0x8000000ull
+#define CCE_INT_CLEAR (CCE + 0x000000110A00)
+#define CCE_INT_COUNTER_ARRAY32 (CCE + 0x000000110D00)
+#define CCE_INT_FORCE (CCE + 0x000000110B00)
+#define CCE_INT_MAP (CCE + 0x000000110500)
+#define CCE_INT_MASK (CCE + 0x000000110900)
+#define CCE_INT_STATUS (CCE + 0x000000110800)
+#define CCE_MSIX_INT_GRANTED (CCE + 0x000000110200)
+#define CCE_MSIX_TABLE_LOWER (CCE + 0x000000100000)
+#define CCE_MSIX_TABLE_UPPER (CCE + 0x000000100008)
+#define CCE_MSIX_TABLE_UPPER_RESETCSR 0x0000000100000000ull
+#define CCE_MSIX_VEC_CLR_WITHOUT_INT (CCE + 0x000000110400)
+#define CCE_REVISION (CCE + 0x000000000000)
+#define CCE_REVISION2 (CCE + 0x000000000008)
+#define CCE_REVISION2_HFI_ID_MASK 0x1ull
+#define CCE_REVISION2_HFI_ID_SHIFT 0
+#define CCE_REVISION2_IMPL_CODE_SHIFT 8
+#define CCE_REVISION2_IMPL_REVISION_SHIFT 16
+#define CCE_REVISION_BOARD_ID_LOWER_NIBBLE_MASK 0xFull
+#define CCE_REVISION_BOARD_ID_LOWER_NIBBLE_SHIFT 32
+#define CCE_REVISION_CHIP_REV_MAJOR_MASK 0xFFull
+#define CCE_REVISION_CHIP_REV_MAJOR_SHIFT 8
+#define CCE_REVISION_CHIP_REV_MINOR_MASK 0xFFull
+#define CCE_REVISION_CHIP_REV_MINOR_SHIFT 0
+#define CCE_REVISION_SW_MASK 0xFFull
+#define CCE_REVISION_SW_SHIFT 24
+#define CCE_SCRATCH (CCE + 0x000000000020)
+#define CCE_STATUS (CCE + 0x000000000018)
+#define CCE_STATUS_RXE_FROZE_SMASK 0x2ull
+#define CCE_STATUS_RXE_PAUSED_SMASK 0x20ull
+#define CCE_STATUS_SDMA_FROZE_SMASK 0x1ull
+#define CCE_STATUS_SDMA_PAUSED_SMASK 0x10ull
+#define CCE_STATUS_TXE_FROZE_SMASK 0x4ull
+#define CCE_STATUS_TXE_PAUSED_SMASK 0x40ull
+#define CCE_STATUS_TXE_PIO_FROZE_SMASK 0x8ull
+#define CCE_STATUS_TXE_PIO_PAUSED_SMASK 0x80ull
+#define MISC_CFG_FW_CTRL (MISC + 0x000000001000)
+#define MISC_CFG_FW_CTRL_FW_8051_LOADED_SMASK 0x2ull
+#define MISC_CFG_FW_CTRL_RSA_STATUS_SHIFT 2
+#define MISC_CFG_FW_CTRL_RSA_STATUS_SMASK 0xCull
+#define MISC_CFG_RSA_CMD (MISC + 0x000000000A08)
+#define MISC_CFG_RSA_MODULUS (MISC + 0x000000000400)
+#define MISC_CFG_RSA_MU (MISC + 0x000000000A10)
+#define MISC_CFG_RSA_R2 (MISC + 0x000000000000)
+#define MISC_CFG_RSA_SIGNATURE (MISC + 0x000000000200)
+#define MISC_CFG_SHA_PRELOAD (MISC + 0x000000000A00)
+#define MISC_ERR_CLEAR (MISC + 0x000000002010)
+#define MISC_ERR_MASK (MISC + 0x000000002008)
+#define MISC_ERR_STATUS (MISC + 0x000000002000)
+#define MISC_ERR_STATUS_MISC_PLL_LOCK_FAIL_ERR_SMASK 0x1000ull
+#define MISC_ERR_STATUS_MISC_MBIST_FAIL_ERR_SMASK 0x800ull
+#define MISC_ERR_STATUS_MISC_INVALID_EEP_CMD_ERR_SMASK 0x400ull
+#define MISC_ERR_STATUS_MISC_EFUSE_DONE_PARITY_ERR_SMASK 0x200ull
+#define MISC_ERR_STATUS_MISC_EFUSE_WRITE_ERR_SMASK 0x100ull
+#define MISC_ERR_STATUS_MISC_EFUSE_READ_BAD_ADDR_ERR_SMASK 0x80ull
+#define MISC_ERR_STATUS_MISC_EFUSE_CSR_PARITY_ERR_SMASK 0x40ull
+#define MISC_ERR_STATUS_MISC_FW_AUTH_FAILED_ERR_SMASK 0x20ull
+#define MISC_ERR_STATUS_MISC_KEY_MISMATCH_ERR_SMASK 0x10ull
+#define MISC_ERR_STATUS_MISC_SBUS_WRITE_FAILED_ERR_SMASK 0x8ull
+#define MISC_ERR_STATUS_MISC_CSR_WRITE_BAD_ADDR_ERR_SMASK 0x4ull
+#define MISC_ERR_STATUS_MISC_CSR_READ_BAD_ADDR_ERR_SMASK 0x2ull
+#define MISC_ERR_STATUS_MISC_CSR_PARITY_ERR_SMASK 0x1ull
+#define PCI_CFG_MSIX0 (PCIE + 0x0000000000B0)
+#define PCI_CFG_REG1 (PCIE + 0x000000000004)
+#define PCI_CFG_REG11 (PCIE + 0x00000000002C)
+#define PCIE_CFG_SPCIE1 (PCIE + 0x00000000014C)
+#define PCIE_CFG_SPCIE2 (PCIE + 0x000000000150)
+#define PCIE_CFG_TPH2 (PCIE + 0x000000000180)
+#define RCV_ARRAY (RXE + 0x000000200000)
+#define RCV_ARRAY_CNT (RXE + 0x000000000018)
+#define RCV_ARRAY_RT_ADDR_MASK 0xFFFFFFFFFull
+#define RCV_ARRAY_RT_ADDR_SHIFT 0
+#define RCV_ARRAY_RT_BUF_SIZE_SHIFT 36
+#define RCV_ARRAY_RT_WRITE_ENABLE_SMASK 0x8000000000000000ull
+#define RCV_AVAIL_TIME_OUT (RXE + 0x000000100050)
+#define RCV_AVAIL_TIME_OUT_TIME_OUT_RELOAD_MASK 0xFFull
+#define RCV_AVAIL_TIME_OUT_TIME_OUT_RELOAD_SHIFT 0
+#define RCV_BTH_QP (RXE + 0x000000000028)
+#define RCV_BTH_QP_KDETH_QP_MASK 0xFFull
+#define RCV_BTH_QP_KDETH_QP_SHIFT 16
+#define RCV_BYPASS (RXE + 0x000000000038)
+#define RCV_CONTEXTS (RXE + 0x000000000010)
+#define RCV_COUNTER_ARRAY32 (RXE + 0x000000000400)
+#define RCV_COUNTER_ARRAY64 (RXE + 0x000000000500)
+#define RCV_CTRL (RXE + 0x000000000000)
+#define RCV_CTRL_RCV_BYPASS_ENABLE_SMASK 0x10ull
+#define RCV_CTRL_RCV_EXTENDED_PSN_ENABLE_SMASK 0x40ull
+#define RCV_CTRL_RCV_PARTITION_KEY_ENABLE_SMASK 0x4ull
+#define RCV_CTRL_RCV_PORT_ENABLE_SMASK 0x1ull
+#define RCV_CTRL_RCV_QP_MAP_ENABLE_SMASK 0x2ull
+#define RCV_CTRL_RCV_RSM_ENABLE_SMASK 0x20ull
+#define RCV_CTRL_RX_RBUF_INIT_SMASK 0x200ull
+#define RCV_CTXT_CTRL (RXE + 0x000000100000)
+#define RCV_CTXT_CTRL_DONT_DROP_EGR_FULL_SMASK 0x4ull
+#define RCV_CTXT_CTRL_DONT_DROP_RHQ_FULL_SMASK 0x8ull
+#define RCV_CTXT_CTRL_EGR_BUF_SIZE_MASK 0x7ull
+#define RCV_CTXT_CTRL_EGR_BUF_SIZE_SHIFT 8
+#define RCV_CTXT_CTRL_EGR_BUF_SIZE_SMASK 0x700ull
+#define RCV_CTXT_CTRL_ENABLE_SMASK 0x1ull
+#define RCV_CTXT_CTRL_INTR_AVAIL_SMASK 0x20ull
+#define RCV_CTXT_CTRL_ONE_PACKET_PER_EGR_BUFFER_SMASK 0x2ull
+#define RCV_CTXT_CTRL_TAIL_UPD_SMASK 0x40ull
+#define RCV_CTXT_CTRL_TID_FLOW_ENABLE_SMASK 0x10ull
+#define RCV_CTXT_STATUS (RXE + 0x000000100008)
+#define RCV_EGR_CTRL (RXE + 0x000000100010)
+#define RCV_EGR_CTRL_EGR_BASE_INDEX_MASK 0x1FFFull
+#define RCV_EGR_CTRL_EGR_BASE_INDEX_SHIFT 0
+#define RCV_EGR_CTRL_EGR_CNT_MASK 0x1FFull
+#define RCV_EGR_CTRL_EGR_CNT_SHIFT 32
+#define RCV_EGR_INDEX_HEAD (RXE + 0x000000300018)
+#define RCV_EGR_INDEX_HEAD_HEAD_MASK 0x7FFull
+#define RCV_EGR_INDEX_HEAD_HEAD_SHIFT 0
+#define RCV_ERR_CLEAR (RXE + 0x000000000070)
+#define RCV_ERR_INFO (RXE + 0x000000000050)
+#define RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SC_SMASK 0x1Full
+#define RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SMASK 0x20ull
+#define RCV_ERR_MASK (RXE + 0x000000000068)
+#define RCV_ERR_STATUS (RXE + 0x000000000060)
+#define RCV_ERR_STATUS_RX_CSR_PARITY_ERR_SMASK 0x8000000000000000ull
+#define RCV_ERR_STATUS_RX_CSR_READ_BAD_ADDR_ERR_SMASK 0x2000000000000000ull
+#define RCV_ERR_STATUS_RX_CSR_WRITE_BAD_ADDR_ERR_SMASK \
+ 0x4000000000000000ull
+#define RCV_ERR_STATUS_RX_DC_INTF_PARITY_ERR_SMASK 0x2ull
+#define RCV_ERR_STATUS_RX_DC_SOP_EOP_PARITY_ERR_SMASK 0x200ull
+#define RCV_ERR_STATUS_RX_DMA_CSR_COR_ERR_SMASK 0x1ull
+#define RCV_ERR_STATUS_RX_DMA_CSR_PARITY_ERR_SMASK 0x200000000000000ull
+#define RCV_ERR_STATUS_RX_DMA_CSR_UNC_ERR_SMASK 0x1000000000000000ull
+#define RCV_ERR_STATUS_RX_DMA_DATA_FIFO_RD_COR_ERR_SMASK \
+ 0x40000000000000ull
+#define RCV_ERR_STATUS_RX_DMA_DATA_FIFO_RD_UNC_ERR_SMASK \
+ 0x20000000000000ull
+#define RCV_ERR_STATUS_RX_DMA_DQ_FSM_ENCODING_ERR_SMASK \
+ 0x800000000000000ull
+#define RCV_ERR_STATUS_RX_DMA_EQ_FSM_ENCODING_ERR_SMASK \
+ 0x400000000000000ull
+#define RCV_ERR_STATUS_RX_DMA_FLAG_COR_ERR_SMASK 0x800ull
+#define RCV_ERR_STATUS_RX_DMA_FLAG_UNC_ERR_SMASK 0x400ull
+#define RCV_ERR_STATUS_RX_DMA_HDR_FIFO_RD_COR_ERR_SMASK 0x10000000000000ull
+#define RCV_ERR_STATUS_RX_DMA_HDR_FIFO_RD_UNC_ERR_SMASK 0x8000000000000ull
+#define RCV_ERR_STATUS_RX_HQ_INTR_CSR_PARITY_ERR_SMASK 0x200000000000ull
+#define RCV_ERR_STATUS_RX_HQ_INTR_FSM_ERR_SMASK 0x400000000000ull
+#define RCV_ERR_STATUS_RX_LOOKUP_CSR_PARITY_ERR_SMASK 0x100000000000ull
+#define RCV_ERR_STATUS_RX_LOOKUP_DES_PART1_UNC_COR_ERR_SMASK \
+ 0x10000000000ull
+#define RCV_ERR_STATUS_RX_LOOKUP_DES_PART1_UNC_ERR_SMASK 0x8000000000ull
+#define RCV_ERR_STATUS_RX_LOOKUP_DES_PART2_PARITY_ERR_SMASK \
+ 0x20000000000ull
+#define RCV_ERR_STATUS_RX_LOOKUP_RCV_ARRAY_COR_ERR_SMASK 0x80000000000ull
+#define RCV_ERR_STATUS_RX_LOOKUP_RCV_ARRAY_UNC_ERR_SMASK 0x40000000000ull
+#define RCV_ERR_STATUS_RX_RBUF_BAD_LOOKUP_ERR_SMASK 0x40000000ull
+#define RCV_ERR_STATUS_RX_RBUF_BLOCK_LIST_READ_COR_ERR_SMASK 0x100000ull
+#define RCV_ERR_STATUS_RX_RBUF_BLOCK_LIST_READ_UNC_ERR_SMASK 0x80000ull
+#define RCV_ERR_STATUS_RX_RBUF_CSR_QENT_CNT_PARITY_ERR_SMASK 0x400000ull
+#define RCV_ERR_STATUS_RX_RBUF_CSR_QEOPDW_PARITY_ERR_SMASK 0x10000000ull
+#define RCV_ERR_STATUS_RX_RBUF_CSR_QHD_PTR_PARITY_ERR_SMASK 0x2000000ull
+#define RCV_ERR_STATUS_RX_RBUF_CSR_QHEAD_BUF_NUM_PARITY_ERR_SMASK \
+ 0x200000ull
+#define RCV_ERR_STATUS_RX_RBUF_CSR_QNEXT_BUF_PARITY_ERR_SMASK 0x800000ull
+#define RCV_ERR_STATUS_RX_RBUF_CSR_QNUM_OF_PKT_PARITY_ERR_SMASK \
+ 0x8000000ull
+#define RCV_ERR_STATUS_RX_RBUF_CSR_QTL_PTR_PARITY_ERR_SMASK 0x4000000ull
+#define RCV_ERR_STATUS_RX_RBUF_CSR_QVLD_BIT_PARITY_ERR_SMASK 0x1000000ull
+#define RCV_ERR_STATUS_RX_RBUF_CTX_ID_PARITY_ERR_SMASK 0x20000000ull
+#define RCV_ERR_STATUS_RX_RBUF_DATA_COR_ERR_SMASK 0x100000000000000ull
+#define RCV_ERR_STATUS_RX_RBUF_DATA_UNC_ERR_SMASK 0x80000000000000ull
+#define RCV_ERR_STATUS_RX_RBUF_DESC_PART1_COR_ERR_SMASK 0x1000000000000ull
+#define RCV_ERR_STATUS_RX_RBUF_DESC_PART1_UNC_ERR_SMASK 0x800000000000ull
+#define RCV_ERR_STATUS_RX_RBUF_DESC_PART2_COR_ERR_SMASK 0x4000000000000ull
+#define RCV_ERR_STATUS_RX_RBUF_DESC_PART2_UNC_ERR_SMASK 0x2000000000000ull
+#define RCV_ERR_STATUS_RX_RBUF_EMPTY_ERR_SMASK 0x100000000ull
+#define RCV_ERR_STATUS_RX_RBUF_FL_INITDONE_PARITY_ERR_SMASK 0x800000000ull
+#define RCV_ERR_STATUS_RX_RBUF_FL_INIT_WR_ADDR_PARITY_ERR_SMASK \
+ 0x1000000000ull
+#define RCV_ERR_STATUS_RX_RBUF_FL_RD_ADDR_PARITY_ERR_SMASK 0x200000000ull
+#define RCV_ERR_STATUS_RX_RBUF_FL_WR_ADDR_PARITY_ERR_SMASK 0x400000000ull
+#define RCV_ERR_STATUS_RX_RBUF_FREE_LIST_COR_ERR_SMASK 0x4000ull
+#define RCV_ERR_STATUS_RX_RBUF_FREE_LIST_UNC_ERR_SMASK 0x2000ull
+#define RCV_ERR_STATUS_RX_RBUF_FULL_ERR_SMASK 0x80000000ull
+#define RCV_ERR_STATUS_RX_RBUF_LOOKUP_DES_COR_ERR_SMASK 0x40000ull
+#define RCV_ERR_STATUS_RX_RBUF_LOOKUP_DES_REG_UNC_COR_ERR_SMASK 0x10000ull
+#define RCV_ERR_STATUS_RX_RBUF_LOOKUP_DES_REG_UNC_ERR_SMASK 0x8000ull
+#define RCV_ERR_STATUS_RX_RBUF_LOOKUP_DES_UNC_ERR_SMASK 0x20000ull
+#define RCV_ERR_STATUS_RX_RBUF_NEXT_FREE_BUF_COR_ERR_SMASK 0x4000000000ull
+#define RCV_ERR_STATUS_RX_RBUF_NEXT_FREE_BUF_UNC_ERR_SMASK 0x2000000000ull
+#define RCV_ERR_STATUS_RX_RCV_CSR_PARITY_ERR_SMASK 0x100ull
+#define RCV_ERR_STATUS_RX_RCV_DATA_COR_ERR_SMASK 0x20ull
+#define RCV_ERR_STATUS_RX_RCV_DATA_UNC_ERR_SMASK 0x10ull
+#define RCV_ERR_STATUS_RX_RCV_FSM_ENCODING_ERR_SMASK 0x1000ull
+#define RCV_ERR_STATUS_RX_RCV_HDR_COR_ERR_SMASK 0x8ull
+#define RCV_ERR_STATUS_RX_RCV_HDR_UNC_ERR_SMASK 0x4ull
+#define RCV_ERR_STATUS_RX_RCV_QP_MAP_TABLE_COR_ERR_SMASK 0x80ull
+#define RCV_ERR_STATUS_RX_RCV_QP_MAP_TABLE_UNC_ERR_SMASK 0x40ull
+#define RCV_HDR_ADDR (RXE + 0x000000100028)
+#define RCV_HDR_CNT (RXE + 0x000000100030)
+#define RCV_HDR_CNT_CNT_MASK 0x1FFull
+#define RCV_HDR_CNT_CNT_SHIFT 0
+#define RCV_HDR_ENT_SIZE (RXE + 0x000000100038)
+#define RCV_HDR_ENT_SIZE_ENT_SIZE_MASK 0x7ull
+#define RCV_HDR_ENT_SIZE_ENT_SIZE_SHIFT 0
+#define RCV_HDR_HEAD (RXE + 0x000000300008)
+#define RCV_HDR_HEAD_COUNTER_MASK 0xFFull
+#define RCV_HDR_HEAD_COUNTER_SHIFT 32
+#define RCV_HDR_HEAD_HEAD_MASK 0x7FFFFull
+#define RCV_HDR_HEAD_HEAD_SHIFT 0
+#define RCV_HDR_HEAD_HEAD_SMASK 0x7FFFFull
+#define RCV_HDR_OVFL_CNT (RXE + 0x000000100058)
+#define RCV_HDR_SIZE (RXE + 0x000000100040)
+#define RCV_HDR_SIZE_HDR_SIZE_MASK 0x1Full
+#define RCV_HDR_SIZE_HDR_SIZE_SHIFT 0
+#define RCV_HDR_TAIL (RXE + 0x000000300000)
+#define RCV_HDR_TAIL_ADDR (RXE + 0x000000100048)
+#define RCV_KEY_CTRL (RXE + 0x000000100020)
+#define RCV_KEY_CTRL_JOB_KEY_ENABLE_SMASK 0x200000000ull
+#define RCV_KEY_CTRL_JOB_KEY_VALUE_MASK 0xFFFFull
+#define RCV_KEY_CTRL_JOB_KEY_VALUE_SHIFT 0
+#define RCV_MULTICAST (RXE + 0x000000000030)
+#define RCV_PARTITION_KEY (RXE + 0x000000000200)
+#define RCV_PARTITION_KEY_PARTITION_KEY_A_MASK 0xFFFFull
+#define RCV_PARTITION_KEY_PARTITION_KEY_B_SHIFT 16
+#define RCV_QP_MAP_TABLE (RXE + 0x000000000100)
+#define RCV_RSM_CFG (RXE + 0x000000000600)
+#define RCV_RSM_CFG_ENABLE_OR_CHAIN_RSM0_MASK 0x1ull
+#define RCV_RSM_CFG_ENABLE_OR_CHAIN_RSM0_SHIFT 0
+#define RCV_RSM_CFG_PACKET_TYPE_SHIFT 60
+#define RCV_RSM_MAP_TABLE (RXE + 0x000000000900)
+#define RCV_RSM_MAP_TABLE_RCV_CONTEXT_A_MASK 0xFFull
+#define RCV_RSM_MATCH (RXE + 0x000000000800)
+#define RCV_RSM_MATCH_MASK1_SHIFT 0
+#define RCV_RSM_MATCH_MASK2_SHIFT 16
+#define RCV_RSM_MATCH_VALUE1_SHIFT 8
+#define RCV_RSM_MATCH_VALUE2_SHIFT 24
+#define RCV_RSM_SELECT (RXE + 0x000000000700)
+#define RCV_RSM_SELECT_FIELD1_OFFSET_SHIFT 0
+#define RCV_RSM_SELECT_FIELD2_OFFSET_SHIFT 16
+#define RCV_RSM_SELECT_INDEX1_OFFSET_SHIFT 32
+#define RCV_RSM_SELECT_INDEX1_WIDTH_SHIFT 44
+#define RCV_RSM_SELECT_INDEX2_OFFSET_SHIFT 48
+#define RCV_RSM_SELECT_INDEX2_WIDTH_SHIFT 60
+#define RCV_STATUS (RXE + 0x000000000008)
+#define RCV_STATUS_RX_PKT_IN_PROGRESS_SMASK 0x1ull
+#define RCV_STATUS_RX_RBUF_INIT_DONE_SMASK 0x200ull
+#define RCV_STATUS_RX_RBUF_PKT_PENDING_SMASK 0x40ull
+#define RCV_TID_CTRL (RXE + 0x000000100018)
+#define RCV_TID_CTRL_TID_BASE_INDEX_MASK 0x1FFFull
+#define RCV_TID_CTRL_TID_BASE_INDEX_SHIFT 0
+#define RCV_TID_CTRL_TID_PAIR_CNT_MASK 0x1FFull
+#define RCV_TID_CTRL_TID_PAIR_CNT_SHIFT 32
+#define RCV_TID_FLOW_TABLE (RXE + 0x000000300800)
+#define RCV_VL15 (RXE + 0x000000000048)
+#define SEND_BTH_QP (TXE + 0x0000000000A0)
+#define SEND_BTH_QP_KDETH_QP_MASK 0xFFull
+#define SEND_BTH_QP_KDETH_QP_SHIFT 16
+#define SEND_CM_CREDIT_USED_STATUS (TXE + 0x000000000510)
+#define SEND_CM_CREDIT_USED_STATUS_VL0_RETURN_CREDIT_STATUS_SMASK \
+ 0x1000000000000ull
+#define SEND_CM_CREDIT_USED_STATUS_VL15_RETURN_CREDIT_STATUS_SMASK \
+ 0x8000000000000000ull
+#define SEND_CM_CREDIT_USED_STATUS_VL1_RETURN_CREDIT_STATUS_SMASK \
+ 0x2000000000000ull
+#define SEND_CM_CREDIT_USED_STATUS_VL2_RETURN_CREDIT_STATUS_SMASK \
+ 0x4000000000000ull
+#define SEND_CM_CREDIT_USED_STATUS_VL3_RETURN_CREDIT_STATUS_SMASK \
+ 0x8000000000000ull
+#define SEND_CM_CREDIT_USED_STATUS_VL4_RETURN_CREDIT_STATUS_SMASK \
+ 0x10000000000000ull
+#define SEND_CM_CREDIT_USED_STATUS_VL5_RETURN_CREDIT_STATUS_SMASK \
+ 0x20000000000000ull
+#define SEND_CM_CREDIT_USED_STATUS_VL6_RETURN_CREDIT_STATUS_SMASK \
+ 0x40000000000000ull
+#define SEND_CM_CREDIT_USED_STATUS_VL7_RETURN_CREDIT_STATUS_SMASK \
+ 0x80000000000000ull
+#define SEND_CM_CREDIT_VL (TXE + 0x000000000600)
+#define SEND_CM_CREDIT_VL15 (TXE + 0x000000000678)
+#define SEND_CM_CREDIT_VL15_DEDICATED_LIMIT_VL_SHIFT 0
+#define SEND_CM_CREDIT_VL_DEDICATED_LIMIT_VL_MASK 0xFFFFull
+#define SEND_CM_CREDIT_VL_DEDICATED_LIMIT_VL_SHIFT 0
+#define SEND_CM_CREDIT_VL_DEDICATED_LIMIT_VL_SMASK 0xFFFFull
+#define SEND_CM_CREDIT_VL_SHARED_LIMIT_VL_MASK 0xFFFFull
+#define SEND_CM_CREDIT_VL_SHARED_LIMIT_VL_SHIFT 16
+#define SEND_CM_CREDIT_VL_SHARED_LIMIT_VL_SMASK 0xFFFF0000ull
+#define SEND_CM_CTRL (TXE + 0x000000000500)
+#define SEND_CM_CTRL_FORCE_CREDIT_MODE_SMASK 0x8ull
+#define SEND_CM_CTRL_RESETCSR 0x0000000000000020ull
+#define SEND_CM_GLOBAL_CREDIT (TXE + 0x000000000508)
+#define SEND_CM_GLOBAL_CREDIT_AU_SHIFT 16
+#define SEND_CM_GLOBAL_CREDIT_RESETCSR 0x0000094000030000ull
+#define SEND_CM_GLOBAL_CREDIT_SHARED_LIMIT_MASK 0xFFFFull
+#define SEND_CM_GLOBAL_CREDIT_SHARED_LIMIT_SHIFT 0
+#define SEND_CM_GLOBAL_CREDIT_SHARED_LIMIT_SMASK 0xFFFFull
+#define SEND_CM_GLOBAL_CREDIT_TOTAL_CREDIT_LIMIT_MASK 0xFFFFull
+#define SEND_CM_GLOBAL_CREDIT_TOTAL_CREDIT_LIMIT_SHIFT 32
+#define SEND_CM_GLOBAL_CREDIT_TOTAL_CREDIT_LIMIT_SMASK 0xFFFF00000000ull
+#define SEND_CM_LOCAL_AU_TABLE0_TO3 (TXE + 0x000000000520)
+#define SEND_CM_LOCAL_AU_TABLE0_TO3_LOCAL_AU_TABLE0_SHIFT 0
+#define SEND_CM_LOCAL_AU_TABLE0_TO3_LOCAL_AU_TABLE1_SHIFT 16
+#define SEND_CM_LOCAL_AU_TABLE0_TO3_LOCAL_AU_TABLE2_SHIFT 32
+#define SEND_CM_LOCAL_AU_TABLE0_TO3_LOCAL_AU_TABLE3_SHIFT 48
+#define SEND_CM_LOCAL_AU_TABLE4_TO7 (TXE + 0x000000000528)
+#define SEND_CM_LOCAL_AU_TABLE4_TO7_LOCAL_AU_TABLE4_SHIFT 0
+#define SEND_CM_LOCAL_AU_TABLE4_TO7_LOCAL_AU_TABLE5_SHIFT 16
+#define SEND_CM_LOCAL_AU_TABLE4_TO7_LOCAL_AU_TABLE6_SHIFT 32
+#define SEND_CM_LOCAL_AU_TABLE4_TO7_LOCAL_AU_TABLE7_SHIFT 48
+#define SEND_CM_REMOTE_AU_TABLE0_TO3 (TXE + 0x000000000530)
+#define SEND_CM_REMOTE_AU_TABLE4_TO7 (TXE + 0x000000000538)
+#define SEND_CM_TIMER_CTRL (TXE + 0x000000000518)
+#define SEND_CONTEXTS (TXE + 0x000000000010)
+#define SEND_CONTEXT_SET_CTRL (TXE + 0x000000000200)
+#define SEND_COUNTER_ARRAY32 (TXE + 0x000000000300)
+#define SEND_COUNTER_ARRAY64 (TXE + 0x000000000400)
+#define SEND_CTRL (TXE + 0x000000000000)
+#define SEND_CTRL_CM_RESET_SMASK 0x4ull
+#define SEND_CTRL_SEND_ENABLE_SMASK 0x1ull
+#define SEND_CTRL_VL_ARBITER_ENABLE_SMASK 0x2ull
+#define SEND_CTXT_CHECK_ENABLE (TXE + 0x000000100080)
+#define SEND_CTXT_CHECK_ENABLE_CHECK_BYPASS_VL_MAPPING_SMASK 0x80ull
+#define SEND_CTXT_CHECK_ENABLE_CHECK_ENABLE_SMASK 0x1ull
+#define SEND_CTXT_CHECK_ENABLE_CHECK_JOB_KEY_SMASK 0x4ull
+#define SEND_CTXT_CHECK_ENABLE_CHECK_OPCODE_SMASK 0x20ull
+#define SEND_CTXT_CHECK_ENABLE_CHECK_PARTITION_KEY_SMASK 0x8ull
+#define SEND_CTXT_CHECK_ENABLE_CHECK_SLID_SMASK 0x10ull
+#define SEND_CTXT_CHECK_ENABLE_CHECK_VL_MAPPING_SMASK 0x40ull
+#define SEND_CTXT_CHECK_ENABLE_CHECK_VL_SMASK 0x2ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_BAD_PKT_LEN_SMASK 0x20000ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_BYPASS_BAD_PKT_LEN_SMASK \
+ 0x200000ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_BYPASS_SMASK 0x800ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_GRH_SMASK 0x400ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_KDETH_PACKETS_SMASK 0x1000ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_NON_KDETH_PACKETS_SMASK 0x2000ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_PBC_STATIC_RATE_CONTROL_SMASK \
+ 0x100000ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_PBC_TEST_SMASK 0x10000ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_RAW_IPV6_SMASK 0x200ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_RAW_SMASK 0x100ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_TOO_LONG_BYPASS_PACKETS_SMASK \
+ 0x80000ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_TOO_LONG_IB_PACKETS_SMASK \
+ 0x40000ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_TOO_SMALL_BYPASS_PACKETS_SMASK \
+ 0x8000ull
+#define SEND_CTXT_CHECK_ENABLE_DISALLOW_TOO_SMALL_IB_PACKETS_SMASK \
+ 0x4000ull
+#define SEND_CTXT_CHECK_JOB_KEY (TXE + 0x000000100090)
+#define SEND_CTXT_CHECK_JOB_KEY_ALLOW_PERMISSIVE_SMASK 0x100000000ull
+#define SEND_CTXT_CHECK_JOB_KEY_MASK_SMASK 0xFFFF0000ull
+#define SEND_CTXT_CHECK_JOB_KEY_VALUE_MASK 0xFFFFull
+#define SEND_CTXT_CHECK_JOB_KEY_VALUE_SHIFT 0
+#define SEND_CTXT_CHECK_OPCODE (TXE + 0x0000001000A8)
+#define SEND_CTXT_CHECK_OPCODE_MASK_SHIFT 8
+#define SEND_CTXT_CHECK_OPCODE_VALUE_SHIFT 0
+#define SEND_CTXT_CHECK_PARTITION_KEY (TXE + 0x000000100098)
+#define SEND_CTXT_CHECK_PARTITION_KEY_VALUE_MASK 0xFFFFull
+#define SEND_CTXT_CHECK_PARTITION_KEY_VALUE_SHIFT 0
+#define SEND_CTXT_CHECK_SLID (TXE + 0x0000001000A0)
+#define SEND_CTXT_CHECK_SLID_MASK_MASK 0xFFFFull
+#define SEND_CTXT_CHECK_SLID_MASK_SHIFT 16
+#define SEND_CTXT_CHECK_SLID_VALUE_MASK 0xFFFFull
+#define SEND_CTXT_CHECK_SLID_VALUE_SHIFT 0
+#define SEND_CTXT_CHECK_VL (TXE + 0x000000100088)
+#define SEND_CTXT_CREDIT_CTRL (TXE + 0x000000100010)
+#define SEND_CTXT_CREDIT_CTRL_CREDIT_INTR_SMASK 0x20000ull
+#define SEND_CTXT_CREDIT_CTRL_EARLY_RETURN_SMASK 0x10000ull
+#define SEND_CTXT_CREDIT_CTRL_THRESHOLD_MASK 0x7FFull
+#define SEND_CTXT_CREDIT_CTRL_THRESHOLD_SHIFT 0
+#define SEND_CTXT_CREDIT_CTRL_THRESHOLD_SMASK 0x7FFull
+#define SEND_CTXT_CREDIT_FORCE (TXE + 0x000000100028)
+#define SEND_CTXT_CREDIT_FORCE_FORCE_RETURN_SMASK 0x1ull
+#define SEND_CTXT_CREDIT_RETURN_ADDR (TXE + 0x000000100020)
+#define SEND_CTXT_CREDIT_RETURN_ADDR_ADDRESS_SMASK 0xFFFFFFFFFFC0ull
+#define SEND_CTXT_CTRL (TXE + 0x000000100000)
+#define SEND_CTXT_CTRL_CTXT_BASE_MASK 0x3FFFull
+#define SEND_CTXT_CTRL_CTXT_BASE_SHIFT 32
+#define SEND_CTXT_CTRL_CTXT_DEPTH_MASK 0x7FFull
+#define SEND_CTXT_CTRL_CTXT_DEPTH_SHIFT 48
+#define SEND_CTXT_CTRL_CTXT_ENABLE_SMASK 0x1ull
+#define SEND_CTXT_ERR_CLEAR (TXE + 0x000000100050)
+#define SEND_CTXT_ERR_MASK (TXE + 0x000000100048)
+#define SEND_CTXT_ERR_STATUS (TXE + 0x000000100040)
+#define SEND_CTXT_ERR_STATUS_PIO_DISALLOWED_PACKET_ERR_SMASK 0x2ull
+#define SEND_CTXT_ERR_STATUS_PIO_INCONSISTENT_SOP_ERR_SMASK 0x1ull
+#define SEND_CTXT_ERR_STATUS_PIO_WRITE_CROSSES_BOUNDARY_ERR_SMASK 0x4ull
+#define SEND_CTXT_ERR_STATUS_PIO_WRITE_OUT_OF_BOUNDS_ERR_SMASK 0x10ull
+#define SEND_CTXT_ERR_STATUS_PIO_WRITE_OVERFLOW_ERR_SMASK 0x8ull
+#define SEND_CTXT_STATUS (TXE + 0x000000100008)
+#define SEND_CTXT_STATUS_CTXT_HALTED_SMASK 0x1ull
+#define SEND_DMA_BASE_ADDR (TXE + 0x000000200010)
+#define SEND_DMA_CHECK_ENABLE (TXE + 0x000000200080)
+#define SEND_DMA_CHECK_ENABLE_CHECK_BYPASS_VL_MAPPING_SMASK 0x80ull
+#define SEND_DMA_CHECK_ENABLE_CHECK_ENABLE_SMASK 0x1ull
+#define SEND_DMA_CHECK_ENABLE_CHECK_JOB_KEY_SMASK 0x4ull
+#define SEND_DMA_CHECK_ENABLE_CHECK_OPCODE_SMASK 0x20ull
+#define SEND_DMA_CHECK_ENABLE_CHECK_PARTITION_KEY_SMASK 0x8ull
+#define SEND_DMA_CHECK_ENABLE_CHECK_SLID_SMASK 0x10ull
+#define SEND_DMA_CHECK_ENABLE_CHECK_VL_MAPPING_SMASK 0x40ull
+#define SEND_DMA_CHECK_ENABLE_CHECK_VL_SMASK 0x2ull
+#define SEND_DMA_CHECK_ENABLE_DISALLOW_BAD_PKT_LEN_SMASK 0x20000ull
+#define SEND_DMA_CHECK_ENABLE_DISALLOW_BYPASS_BAD_PKT_LEN_SMASK 0x200000ull
+#define SEND_DMA_CHECK_ENABLE_DISALLOW_PBC_STATIC_RATE_CONTROL_SMASK \
+ 0x100000ull
+#define SEND_DMA_CHECK_ENABLE_DISALLOW_RAW_IPV6_SMASK 0x200ull
+#define SEND_DMA_CHECK_ENABLE_DISALLOW_RAW_SMASK 0x100ull
+#define SEND_DMA_CHECK_ENABLE_DISALLOW_TOO_LONG_BYPASS_PACKETS_SMASK \
+ 0x80000ull
+#define SEND_DMA_CHECK_ENABLE_DISALLOW_TOO_LONG_IB_PACKETS_SMASK 0x40000ull
+#define SEND_DMA_CHECK_ENABLE_DISALLOW_TOO_SMALL_BYPASS_PACKETS_SMASK \
+ 0x8000ull
+#define SEND_DMA_CHECK_ENABLE_DISALLOW_TOO_SMALL_IB_PACKETS_SMASK 0x4000ull
+#define SEND_DMA_CHECK_JOB_KEY (TXE + 0x000000200090)
+#define SEND_DMA_CHECK_OPCODE (TXE + 0x0000002000A8)
+#define SEND_DMA_CHECK_PARTITION_KEY (TXE + 0x000000200098)
+#define SEND_DMA_CHECK_SLID (TXE + 0x0000002000A0)
+#define SEND_DMA_CHECK_SLID_MASK_MASK 0xFFFFull
+#define SEND_DMA_CHECK_SLID_MASK_SHIFT 16
+#define SEND_DMA_CHECK_SLID_VALUE_MASK 0xFFFFull
+#define SEND_DMA_CHECK_SLID_VALUE_SHIFT 0
+#define SEND_DMA_CHECK_VL (TXE + 0x000000200088)
+#define SEND_DMA_CTRL (TXE + 0x000000200000)
+#define SEND_DMA_CTRL_SDMA_CLEANUP_SMASK 0x4ull
+#define SEND_DMA_CTRL_SDMA_ENABLE_SMASK 0x1ull
+#define SEND_DMA_CTRL_SDMA_HALT_SMASK 0x2ull
+#define SEND_DMA_CTRL_SDMA_INT_ENABLE_SMASK 0x8ull
+#define SEND_DMA_DESC_CNT (TXE + 0x000000200050)
+#define SEND_DMA_DESC_CNT_CNT_MASK 0xFFFFull
+#define SEND_DMA_DESC_CNT_CNT_SHIFT 0
+#define SEND_DMA_ENG_ERR_CLEAR (TXE + 0x000000200070)
+#define SEND_DMA_ENG_ERR_CLEAR_SDMA_HEADER_REQUEST_FIFO_UNC_ERR_MASK 0x1ull
+#define SEND_DMA_ENG_ERR_CLEAR_SDMA_HEADER_REQUEST_FIFO_UNC_ERR_SHIFT 18
+#define SEND_DMA_ENG_ERR_MASK (TXE + 0x000000200068)
+#define SEND_DMA_ENG_ERR_STATUS (TXE + 0x000000200060)
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_ASSEMBLY_UNC_ERR_SMASK 0x8000ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_DESC_TABLE_UNC_ERR_SMASK 0x4000ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_FIRST_DESC_ERR_SMASK 0x10ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_GEN_MISMATCH_ERR_SMASK 0x2ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_HALT_ERR_SMASK 0x40ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_HEADER_ADDRESS_ERR_SMASK 0x800ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_HEADER_LENGTH_ERR_SMASK 0x1000ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_HEADER_REQUEST_FIFO_UNC_ERR_SMASK \
+ 0x40000ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_HEADER_SELECT_ERR_SMASK 0x400ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_HEADER_STORAGE_UNC_ERR_SMASK \
+ 0x20000ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_LENGTH_MISMATCH_ERR_SMASK 0x80ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_MEM_READ_ERR_SMASK 0x20ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_PACKET_DESC_OVERFLOW_ERR_SMASK \
+ 0x100ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_PACKET_TRACKING_UNC_ERR_SMASK \
+ 0x10000ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_TAIL_OUT_OF_BOUNDS_ERR_SMASK 0x8ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_TIMEOUT_ERR_SMASK 0x2000ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_TOO_LONG_ERR_SMASK 0x4ull
+#define SEND_DMA_ENG_ERR_STATUS_SDMA_WRONG_DW_ERR_SMASK 0x1ull
+#define SEND_DMA_ENGINES (TXE + 0x000000000018)
+#define SEND_DMA_ERR_CLEAR (TXE + 0x000000000070)
+#define SEND_DMA_ERR_MASK (TXE + 0x000000000068)
+#define SEND_DMA_ERR_STATUS (TXE + 0x000000000060)
+#define SEND_DMA_ERR_STATUS_SDMA_CSR_PARITY_ERR_SMASK 0x2ull
+#define SEND_DMA_ERR_STATUS_SDMA_PCIE_REQ_TRACKING_COR_ERR_SMASK 0x8ull
+#define SEND_DMA_ERR_STATUS_SDMA_PCIE_REQ_TRACKING_UNC_ERR_SMASK 0x4ull
+#define SEND_DMA_ERR_STATUS_SDMA_RPY_TAG_ERR_SMASK 0x1ull
+#define SEND_DMA_HEAD (TXE + 0x000000200028)
+#define SEND_DMA_HEAD_ADDR (TXE + 0x000000200030)
+#define SEND_DMA_LEN_GEN (TXE + 0x000000200018)
+#define SEND_DMA_LEN_GEN_GENERATION_SHIFT 16
+#define SEND_DMA_LEN_GEN_LENGTH_SHIFT 6
+#define SEND_DMA_MEMORY (TXE + 0x0000002000B0)
+#define SEND_DMA_MEMORY_SDMA_MEMORY_CNT_SHIFT 16
+#define SEND_DMA_MEMORY_SDMA_MEMORY_INDEX_SHIFT 0
+#define SEND_DMA_MEM_SIZE (TXE + 0x000000000028)
+#define SEND_DMA_PRIORITY_THLD (TXE + 0x000000200038)
+#define SEND_DMA_RELOAD_CNT (TXE + 0x000000200048)
+#define SEND_DMA_STATUS (TXE + 0x000000200008)
+#define SEND_DMA_STATUS_ENG_CLEANED_UP_SMASK 0x200000000000000ull
+#define SEND_DMA_STATUS_ENG_HALTED_SMASK 0x100000000000000ull
+#define SEND_DMA_TAIL (TXE + 0x000000200020)
+#define SEND_EGRESS_CTXT_STATUS (TXE + 0x000000000800)
+#define SEND_EGRESS_CTXT_STATUS_CTXT_EGRESS_HALT_STATUS_SMASK 0x10000ull
+#define SEND_EGRESS_CTXT_STATUS_CTXT_EGRESS_PACKET_OCCUPANCY_SHIFT 0
+#define SEND_EGRESS_CTXT_STATUS_CTXT_EGRESS_PACKET_OCCUPANCY_SMASK \
+ 0x3FFFull
+#define SEND_EGRESS_ERR_CLEAR (TXE + 0x000000000090)
+#define SEND_EGRESS_ERR_INFO (TXE + 0x000000000F00)
+#define SEND_EGRESS_ERR_INFO_BAD_PKT_LEN_ERR_SMASK 0x20000ull
+#define SEND_EGRESS_ERR_INFO_BYPASS_ERR_SMASK 0x800ull
+#define SEND_EGRESS_ERR_INFO_GRH_ERR_SMASK 0x400ull
+#define SEND_EGRESS_ERR_INFO_JOB_KEY_ERR_SMASK 0x4ull
+#define SEND_EGRESS_ERR_INFO_KDETH_PACKETS_ERR_SMASK 0x1000ull
+#define SEND_EGRESS_ERR_INFO_NON_KDETH_PACKETS_ERR_SMASK 0x2000ull
+#define SEND_EGRESS_ERR_INFO_OPCODE_ERR_SMASK 0x20ull
+#define SEND_EGRESS_ERR_INFO_PARTITION_KEY_ERR_SMASK 0x8ull
+#define SEND_EGRESS_ERR_INFO_PBC_STATIC_RATE_CONTROL_ERR_SMASK 0x100000ull
+#define SEND_EGRESS_ERR_INFO_PBC_TEST_ERR_SMASK 0x10000ull
+#define SEND_EGRESS_ERR_INFO_RAW_ERR_SMASK 0x100ull
+#define SEND_EGRESS_ERR_INFO_RAW_IPV6_ERR_SMASK 0x200ull
+#define SEND_EGRESS_ERR_INFO_SLID_ERR_SMASK 0x10ull
+#define SEND_EGRESS_ERR_INFO_TOO_LONG_BYPASS_PACKETS_ERR_SMASK 0x80000ull
+#define SEND_EGRESS_ERR_INFO_TOO_LONG_IB_PACKET_ERR_SMASK 0x40000ull
+#define SEND_EGRESS_ERR_INFO_TOO_SMALL_BYPASS_PACKETS_ERR_SMASK 0x8000ull
+#define SEND_EGRESS_ERR_INFO_TOO_SMALL_IB_PACKETS_ERR_SMASK 0x4000ull
+#define SEND_EGRESS_ERR_INFO_VL_ERR_SMASK 0x2ull
+#define SEND_EGRESS_ERR_INFO_VL_MAPPING_ERR_SMASK 0x40ull
+#define SEND_EGRESS_ERR_MASK (TXE + 0x000000000088)
+#define SEND_EGRESS_ERR_SOURCE (TXE + 0x000000000F08)
+#define SEND_EGRESS_ERR_STATUS (TXE + 0x000000000080)
+#define SEND_EGRESS_ERR_STATUS_TX_CONFIG_PARITY_ERR_SMASK 0x8000ull
+#define SEND_EGRESS_ERR_STATUS_TX_CREDIT_OVERRUN_ERR_SMASK \
+ 0x200000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_CREDIT_RETURN_PARITY_ERR_SMASK \
+ 0x20000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_CREDIT_RETURN_VL_ERR_SMASK \
+ 0x800000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_EGRESS_FIFO_COR_ERR_SMASK \
+ 0x2000000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_EGRESS_FIFO_UNC_ERR_SMASK \
+ 0x200000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_EGRESS_FIFO_UNDERRUN_OR_PARITY_ERR_SMASK \
+ 0x8ull
+#define SEND_EGRESS_ERR_STATUS_TX_HCRC_INSERTION_ERR_SMASK \
+ 0x400000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_ILLEGAL_VL_ERR_SMASK 0x1000ull
+#define SEND_EGRESS_ERR_STATUS_TX_INCORRECT_LINK_STATE_ERR_SMASK 0x20ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_CSR_PARITY_ERR_SMASK 0x2000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO0_COR_ERR_SMASK \
+ 0x1000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO0_UNC_OR_PARITY_ERR_SMASK \
+ 0x100000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO1_COR_ERR_SMASK \
+ 0x2000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO1_UNC_OR_PARITY_ERR_SMASK \
+ 0x200000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO2_COR_ERR_SMASK \
+ 0x4000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO2_UNC_OR_PARITY_ERR_SMASK \
+ 0x400000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO3_COR_ERR_SMASK \
+ 0x8000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO3_UNC_OR_PARITY_ERR_SMASK \
+ 0x800000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO4_COR_ERR_SMASK \
+ 0x10000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO4_UNC_OR_PARITY_ERR_SMASK \
+ 0x1000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO5_COR_ERR_SMASK \
+ 0x20000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO5_UNC_OR_PARITY_ERR_SMASK \
+ 0x2000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO6_COR_ERR_SMASK \
+ 0x40000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO6_UNC_OR_PARITY_ERR_SMASK \
+ 0x4000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO7_COR_ERR_SMASK \
+ 0x80000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO7_UNC_OR_PARITY_ERR_SMASK \
+ 0x8000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO8_COR_ERR_SMASK \
+ 0x100000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LAUNCH_FIFO8_UNC_OR_PARITY_ERR_SMASK \
+ 0x10000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_LINKDOWN_ERR_SMASK 0x10ull
+#define SEND_EGRESS_ERR_STATUS_TX_PIO_LAUNCH_INTF_PARITY_ERR_SMASK 0x80ull
+#define SEND_EGRESS_ERR_STATUS_TX_PKT_INTEGRITY_MEM_COR_ERR_SMASK 0x1ull
+#define SEND_EGRESS_ERR_STATUS_TX_PKT_INTEGRITY_MEM_UNC_ERR_SMASK 0x2ull
+#define SEND_EGRESS_ERR_STATUS_TX_READ_PIO_MEMORY_COR_ERR_SMASK \
+ 0x1000000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_READ_PIO_MEMORY_CSR_UNC_ERR_SMASK \
+ 0x8000000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_READ_PIO_MEMORY_UNC_ERR_SMASK \
+ 0x100000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_READ_SDMA_MEMORY_COR_ERR_SMASK \
+ 0x800000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_READ_SDMA_MEMORY_CSR_UNC_ERR_SMASK \
+ 0x4000000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_READ_SDMA_MEMORY_UNC_ERR_SMASK \
+ 0x80000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SB_HDR_COR_ERR_SMASK 0x400000000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SB_HDR_UNC_ERR_SMASK 0x40000000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SBRD_CTL_CSR_PARITY_ERR_SMASK 0x4000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SBRD_CTL_STATE_MACHINE_PARITY_ERR_SMASK \
+ 0x800ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA0_DISALLOWED_PACKET_ERR_SMASK \
+ 0x10000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA10_DISALLOWED_PACKET_ERR_SMASK \
+ 0x4000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA11_DISALLOWED_PACKET_ERR_SMASK \
+ 0x8000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA12_DISALLOWED_PACKET_ERR_SMASK \
+ 0x10000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA13_DISALLOWED_PACKET_ERR_SMASK \
+ 0x20000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA14_DISALLOWED_PACKET_ERR_SMASK \
+ 0x40000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA15_DISALLOWED_PACKET_ERR_SMASK \
+ 0x80000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA1_DISALLOWED_PACKET_ERR_SMASK \
+ 0x20000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA2_DISALLOWED_PACKET_ERR_SMASK \
+ 0x40000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA3_DISALLOWED_PACKET_ERR_SMASK \
+ 0x80000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA4_DISALLOWED_PACKET_ERR_SMASK \
+ 0x100000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA5_DISALLOWED_PACKET_ERR_SMASK \
+ 0x200000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA6_DISALLOWED_PACKET_ERR_SMASK \
+ 0x400000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA7_DISALLOWED_PACKET_ERR_SMASK \
+ 0x800000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA8_DISALLOWED_PACKET_ERR_SMASK \
+ 0x1000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA9_DISALLOWED_PACKET_ERR_SMASK \
+ 0x2000000ull
+#define SEND_EGRESS_ERR_STATUS_TX_SDMA_LAUNCH_INTF_PARITY_ERR_SMASK \
+ 0x100ull
+#define SEND_EGRESS_SEND_DMA_STATUS (TXE + 0x000000000E00)
+#define SEND_EGRESS_SEND_DMA_STATUS_SDMA_EGRESS_PACKET_OCCUPANCY_SHIFT 0
+#define SEND_EGRESS_SEND_DMA_STATUS_SDMA_EGRESS_PACKET_OCCUPANCY_SMASK \
+ 0x3FFFull
+#define SEND_ERR_CLEAR (TXE + 0x0000000000F0)
+#define SEND_ERR_MASK (TXE + 0x0000000000E8)
+#define SEND_ERR_STATUS (TXE + 0x0000000000E0)
+#define SEND_ERR_STATUS_SEND_CSR_PARITY_ERR_SMASK 0x1ull
+#define SEND_ERR_STATUS_SEND_CSR_READ_BAD_ADDR_ERR_SMASK 0x2ull
+#define SEND_ERR_STATUS_SEND_CSR_WRITE_BAD_ADDR_ERR_SMASK 0x4ull
+#define SEND_HIGH_PRIORITY_LIMIT (TXE + 0x000000000030)
+#define SEND_HIGH_PRIORITY_LIMIT_LIMIT_MASK 0x3FFFull
+#define SEND_HIGH_PRIORITY_LIMIT_LIMIT_SHIFT 0
+#define SEND_HIGH_PRIORITY_LIST (TXE + 0x000000000180)
+#define SEND_LEN_CHECK0 (TXE + 0x0000000000D0)
+#define SEND_LEN_CHECK0_LEN_VL0_MASK 0xFFFull
+#define SEND_LEN_CHECK0_LEN_VL1_SHIFT 12
+#define SEND_LEN_CHECK1 (TXE + 0x0000000000D8)
+#define SEND_LEN_CHECK1_LEN_VL15_MASK 0xFFFull
+#define SEND_LEN_CHECK1_LEN_VL15_SHIFT 48
+#define SEND_LEN_CHECK1_LEN_VL4_MASK 0xFFFull
+#define SEND_LEN_CHECK1_LEN_VL5_SHIFT 12
+#define SEND_LOW_PRIORITY_LIST (TXE + 0x000000000100)
+#define SEND_LOW_PRIORITY_LIST_VL_MASK 0x7ull
+#define SEND_LOW_PRIORITY_LIST_VL_SHIFT 16
+#define SEND_LOW_PRIORITY_LIST_WEIGHT_MASK 0xFFull
+#define SEND_LOW_PRIORITY_LIST_WEIGHT_SHIFT 0
+#define SEND_PIO_ERR_CLEAR (TXE + 0x000000000050)
+#define SEND_PIO_ERR_CLEAR_PIO_INIT_SM_IN_ERR_SMASK 0x20000ull
+#define SEND_PIO_ERR_MASK (TXE + 0x000000000048)
+#define SEND_PIO_ERR_STATUS (TXE + 0x000000000040)
+#define SEND_PIO_ERR_STATUS_PIO_BLOCK_QW_COUNT_PARITY_ERR_SMASK \
+ 0x1000000ull
+#define SEND_PIO_ERR_STATUS_PIO_CREDIT_RET_FIFO_PARITY_ERR_SMASK 0x8000ull
+#define SEND_PIO_ERR_STATUS_PIO_CSR_PARITY_ERR_SMASK 0x4ull
+#define SEND_PIO_ERR_STATUS_PIO_CURRENT_FREE_CNT_PARITY_ERR_SMASK \
+ 0x100000000ull
+#define SEND_PIO_ERR_STATUS_PIO_HOST_ADDR_MEM_COR_ERR_SMASK 0x100000ull
+#define SEND_PIO_ERR_STATUS_PIO_HOST_ADDR_MEM_UNC_ERR_SMASK 0x80000ull
+#define SEND_PIO_ERR_STATUS_PIO_INIT_SM_IN_ERR_SMASK 0x20000ull
+#define SEND_PIO_ERR_STATUS_PIO_LAST_RETURNED_CNT_PARITY_ERR_SMASK \
+ 0x200000000ull
+#define SEND_PIO_ERR_STATUS_PIO_PCC_FIFO_PARITY_ERR_SMASK 0x20ull
+#define SEND_PIO_ERR_STATUS_PIO_PCC_SOP_HEAD_PARITY_ERR_SMASK \
+ 0x400000000ull
+#define SEND_PIO_ERR_STATUS_PIO_PEC_FIFO_PARITY_ERR_SMASK 0x40ull
+#define SEND_PIO_ERR_STATUS_PIO_PEC_SOP_HEAD_PARITY_ERR_SMASK \
+ 0x800000000ull
+#define SEND_PIO_ERR_STATUS_PIO_PKT_EVICT_FIFO_PARITY_ERR_SMASK 0x200ull
+#define SEND_PIO_ERR_STATUS_PIO_PKT_EVICT_SM_OR_ARB_SM_ERR_SMASK 0x40000ull
+#define SEND_PIO_ERR_STATUS_PIO_PPMC_BQC_MEM_PARITY_ERR_SMASK 0x10000000ull
+#define SEND_PIO_ERR_STATUS_PIO_PPMC_PBL_FIFO_ERR_SMASK 0x10000ull
+#define SEND_PIO_ERR_STATUS_PIO_PPMC_SOP_LEN_ERR_SMASK 0x20000000ull
+#define SEND_PIO_ERR_STATUS_PIO_SB_MEM_FIFO0_ERR_SMASK 0x8ull
+#define SEND_PIO_ERR_STATUS_PIO_SB_MEM_FIFO1_ERR_SMASK 0x10ull
+#define SEND_PIO_ERR_STATUS_PIO_SBRDCTL_CRREL_PARITY_ERR_SMASK 0x80ull
+#define SEND_PIO_ERR_STATUS_PIO_SBRDCTRL_CRREL_FIFO_PARITY_ERR_SMASK \
+ 0x100ull
+#define SEND_PIO_ERR_STATUS_PIO_SM_PKT_RESET_PARITY_ERR_SMASK 0x400ull
+#define SEND_PIO_ERR_STATUS_PIO_STATE_MACHINE_ERR_SMASK 0x400000ull
+#define SEND_PIO_ERR_STATUS_PIO_VL_FIFO_PARITY_ERR_SMASK 0x8000000ull
+#define SEND_PIO_ERR_STATUS_PIO_VLF_SOP_PARITY_ERR_SMASK 0x4000000ull
+#define SEND_PIO_ERR_STATUS_PIO_VLF_VL_LEN_PARITY_ERR_SMASK 0x2000000ull
+#define SEND_PIO_ERR_STATUS_PIO_VL_LEN_MEM_BANK0_COR_ERR_SMASK 0x2000ull
+#define SEND_PIO_ERR_STATUS_PIO_VL_LEN_MEM_BANK0_UNC_ERR_SMASK 0x800ull
+#define SEND_PIO_ERR_STATUS_PIO_VL_LEN_MEM_BANK1_COR_ERR_SMASK 0x4000ull
+#define SEND_PIO_ERR_STATUS_PIO_VL_LEN_MEM_BANK1_UNC_ERR_SMASK 0x1000ull
+#define SEND_PIO_ERR_STATUS_PIO_WRITE_ADDR_PARITY_ERR_SMASK 0x2ull
+#define SEND_PIO_ERR_STATUS_PIO_WRITE_BAD_CTXT_ERR_SMASK 0x1ull
+#define SEND_PIO_ERR_STATUS_PIO_WRITE_DATA_PARITY_ERR_SMASK 0x200000ull
+#define SEND_PIO_ERR_STATUS_PIO_WRITE_QW_VALID_PARITY_ERR_SMASK 0x800000ull
+#define SEND_PIO_INIT_CTXT (TXE + 0x000000000038)
+#define SEND_PIO_INIT_CTXT_PIO_ALL_CTXT_INIT_SMASK 0x1ull
+#define SEND_PIO_INIT_CTXT_PIO_CTXT_NUM_MASK 0xFFull
+#define SEND_PIO_INIT_CTXT_PIO_CTXT_NUM_SHIFT 8
+#define SEND_PIO_INIT_CTXT_PIO_INIT_ERR_SMASK 0x8ull
+#define SEND_PIO_INIT_CTXT_PIO_INIT_IN_PROGRESS_SMASK 0x4ull
+#define SEND_PIO_INIT_CTXT_PIO_SINGLE_CTXT_INIT_SMASK 0x2ull
+#define SEND_PIO_MEM_SIZE (TXE + 0x000000000020)
+#define SEND_SC2VLT0 (TXE + 0x0000000000B0)
+#define SEND_SC2VLT0_SC0_SHIFT 0
+#define SEND_SC2VLT0_SC1_SHIFT 8
+#define SEND_SC2VLT0_SC2_SHIFT 16
+#define SEND_SC2VLT0_SC3_SHIFT 24
+#define SEND_SC2VLT0_SC4_SHIFT 32
+#define SEND_SC2VLT0_SC5_SHIFT 40
+#define SEND_SC2VLT0_SC6_SHIFT 48
+#define SEND_SC2VLT0_SC7_SHIFT 56
+#define SEND_SC2VLT1 (TXE + 0x0000000000B8)
+#define SEND_SC2VLT1_SC10_SHIFT 16
+#define SEND_SC2VLT1_SC11_SHIFT 24
+#define SEND_SC2VLT1_SC12_SHIFT 32
+#define SEND_SC2VLT1_SC13_SHIFT 40
+#define SEND_SC2VLT1_SC14_SHIFT 48
+#define SEND_SC2VLT1_SC15_SHIFT 56
+#define SEND_SC2VLT1_SC8_SHIFT 0
+#define SEND_SC2VLT1_SC9_SHIFT 8
+#define SEND_SC2VLT2 (TXE + 0x0000000000C0)
+#define SEND_SC2VLT2_SC16_SHIFT 0
+#define SEND_SC2VLT2_SC17_SHIFT 8
+#define SEND_SC2VLT2_SC18_SHIFT 16
+#define SEND_SC2VLT2_SC19_SHIFT 24
+#define SEND_SC2VLT2_SC20_SHIFT 32
+#define SEND_SC2VLT2_SC21_SHIFT 40
+#define SEND_SC2VLT2_SC22_SHIFT 48
+#define SEND_SC2VLT2_SC23_SHIFT 56
+#define SEND_SC2VLT3 (TXE + 0x0000000000C8)
+#define SEND_SC2VLT3_SC24_SHIFT 0
+#define SEND_SC2VLT3_SC25_SHIFT 8
+#define SEND_SC2VLT3_SC26_SHIFT 16
+#define SEND_SC2VLT3_SC27_SHIFT 24
+#define SEND_SC2VLT3_SC28_SHIFT 32
+#define SEND_SC2VLT3_SC29_SHIFT 40
+#define SEND_SC2VLT3_SC30_SHIFT 48
+#define SEND_SC2VLT3_SC31_SHIFT 56
+#define SEND_STATIC_RATE_CONTROL (TXE + 0x0000000000A8)
+#define SEND_STATIC_RATE_CONTROL_CSR_SRC_RELOAD_SHIFT 0
+#define SEND_STATIC_RATE_CONTROL_CSR_SRC_RELOAD_SMASK 0xFFFFull
+#define PCIE_CFG_REG_PL2 (PCIE + 0x000000000708)
+#define PCIE_CFG_REG_PL102 (PCIE + 0x000000000898)
+#define PCIE_CFG_REG_PL102_GEN3_EQ_POST_CURSOR_PSET_SHIFT 12
+#define PCIE_CFG_REG_PL102_GEN3_EQ_CURSOR_PSET_SHIFT 6
+#define PCIE_CFG_REG_PL102_GEN3_EQ_PRE_CURSOR_PSET_SHIFT 0
+#define PCIE_CFG_REG_PL103 (PCIE + 0x00000000089C)
+#define PCIE_CFG_REG_PL105 (PCIE + 0x0000000008A4)
+#define PCIE_CFG_REG_PL105_GEN3_EQ_VIOLATE_COEF_RULES_SMASK 0x1ull
+#define PCIE_CFG_REG_PL2_LOW_PWR_ENT_CNT_SHIFT 24
+#define PCIE_CFG_REG_PL100 (PCIE + 0x000000000890)
+#define PCIE_CFG_REG_PL100_EQ_EIEOS_CNT_SMASK 0x400ull
+#define PCIE_CFG_REG_PL101 (PCIE + 0x000000000894)
+#define PCIE_CFG_REG_PL101_GEN3_EQ_LOCAL_FS_SHIFT 6
+#define PCIE_CFG_REG_PL101_GEN3_EQ_LOCAL_LF_SHIFT 0
+#define PCIE_CFG_REG_PL106 (PCIE + 0x0000000008A8)
+#define PCIE_CFG_REG_PL106_GEN3_EQ_PSET_REQ_VEC_SHIFT 8
+#define PCIE_CFG_REG_PL106_GEN3_EQ_EVAL2MS_DISABLE_SMASK 0x20ull
+#define PCIE_CFG_REG_PL106_GEN3_EQ_PHASE23_EXIT_MODE_SMASK 0x10ull
+
+#endif /* DEF_CHIP_REG */
diff --git a/drivers/staging/rdma/hfi1/common.h b/drivers/staging/rdma/hfi1/common.h
new file mode 100644
index 0000000..5f22937
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/common.h
@@ -0,0 +1,415 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef _COMMON_H
+#define _COMMON_H
+
+#include <rdma/hfi/hfi1_user.h>
+
+/*
+ * This file contains defines, structures, etc. that are used
+ * to communicate between kernel and user code.
+ */
+
+/* version of protocol header (known to chip also). In the long run,
+ * we should be able to generate and accept a range of version numbers;
+ * for now we only accept one, and it's compiled in.
+ */
+#define IPS_PROTO_VERSION 2
+
+/*
+ * These are compile time constants that you may want to enable or disable
+ * if you are trying to debug problems with code or performance.
+ * HFI1_VERBOSE_TRACING define as 1 if you want additional tracing in
+ * fast path code
+ * HFI1_TRACE_REGWRITES define as 1 if you want register writes to be
+ * traced in fast path code
+ * _HFI1_TRACING define as 0 if you want to remove all tracing in a
+ * compilation unit
+ */
+
+/*
+ * If a packet's QP[23:16] bits match this value, then it is
+ * a PSM packet and the hardware will expect a KDETH header
+ * following the BTH.
+ */
+#define DEFAULT_KDETH_QP 0x80
+
+/* driver/hw feature set bitmask */
+#define HFI1_CAP_USER_SHIFT 24
+#define HFI1_CAP_MASK ((1UL << HFI1_CAP_USER_SHIFT) - 1)
+/* locked flag - if set, only HFI1_CAP_WRITABLE_MASK bits can be set */
+#define HFI1_CAP_LOCKED_SHIFT 63
+#define HFI1_CAP_LOCKED_MASK 0x1ULL
+#define HFI1_CAP_LOCKED_SMASK (HFI1_CAP_LOCKED_MASK << HFI1_CAP_LOCKED_SHIFT)
+/* extra bits used between kernel and user processes */
+#define HFI1_CAP_MISC_SHIFT (HFI1_CAP_USER_SHIFT * 2)
+#define HFI1_CAP_MISC_MASK ((1ULL << (HFI1_CAP_LOCKED_SHIFT - \
+ HFI1_CAP_MISC_SHIFT)) - 1)
+
+#define HFI1_CAP_KSET(cap) ({ hfi1_cap_mask |= HFI1_CAP_##cap; hfi1_cap_mask; })
+#define HFI1_CAP_KCLEAR(cap) \
+ ({ \
+ hfi1_cap_mask &= ~HFI1_CAP_##cap; \
+ hfi1_cap_mask; \
+ })
+#define HFI1_CAP_USET(cap) \
+ ({ \
+ hfi1_cap_mask |= (HFI1_CAP_##cap << HFI1_CAP_USER_SHIFT); \
+ hfi1_cap_mask; \
+ })
+#define HFI1_CAP_UCLEAR(cap) \
+ ({ \
+ hfi1_cap_mask &= ~(HFI1_CAP_##cap << HFI1_CAP_USER_SHIFT); \
+ hfi1_cap_mask; \
+ })
+#define HFI1_CAP_SET(cap) \
+ ({ \
+ hfi1_cap_mask |= (HFI1_CAP_##cap | (HFI1_CAP_##cap << \
+ HFI1_CAP_USER_SHIFT)); \
+ hfi1_cap_mask; \
+ })
+#define HFI1_CAP_CLEAR(cap) \
+ ({ \
+ hfi1_cap_mask &= ~(HFI1_CAP_##cap | \
+ (HFI1_CAP_##cap << HFI1_CAP_USER_SHIFT)); \
+ hfi1_cap_mask; \
+ })
+#define HFI1_CAP_LOCK() \
+ ({ hfi1_cap_mask |= HFI1_CAP_LOCKED_SMASK; hfi1_cap_mask; })
+#define HFI1_CAP_LOCKED() (!!(hfi1_cap_mask & HFI1_CAP_LOCKED_SMASK))
+/*
+ * The set of capability bits that can be changed after initial load
+ * This set is the same for kernel and user contexts. However, for
+ * user contexts, the set can be further filtered by using the
+ * HFI1_CAP_RESERVED_MASK bits.
+ */
+#define HFI1_CAP_WRITABLE_MASK (HFI1_CAP_SDMA_AHG | \
+ HFI1_CAP_HDRSUPP | \
+ HFI1_CAP_MULTI_PKT_EGR | \
+ HFI1_CAP_NODROP_RHQ_FULL | \
+ HFI1_CAP_NODROP_EGR_FULL | \
+ HFI1_CAP_ALLOW_PERM_JKEY | \
+ HFI1_CAP_STATIC_RATE_CTRL | \
+ HFI1_CAP_PRINT_UNIMPL)
+/*
+ * A set of capability bits that are "global" and are not allowed to be
+ * set in the user bitmask.
+ */
+#define HFI1_CAP_RESERVED_MASK ((HFI1_CAP_SDMA | \
+ HFI1_CAP_USE_SDMA_HEAD | \
+ HFI1_CAP_EXTENDED_PSN | \
+ HFI1_CAP_PRINT_UNIMPL | \
+ HFI1_CAP_QSFP_ENABLED | \
+ HFI1_CAP_NO_INTEGRITY | \
+ HFI1_CAP_PKEY_CHECK) << \
+ HFI1_CAP_USER_SHIFT)
+/*
+ * Set of capabilities that need to be enabled for kernel context in
+ * order to be allowed for user contexts, as well.
+ */
+#define HFI1_CAP_MUST_HAVE_KERN (HFI1_CAP_STATIC_RATE_CTRL)
+/* Default enabled capabilities (both kernel and user) */
+#define HFI1_CAP_MASK_DEFAULT (HFI1_CAP_HDRSUPP | \
+ HFI1_CAP_NODROP_RHQ_FULL | \
+ HFI1_CAP_NODROP_EGR_FULL | \
+ HFI1_CAP_SDMA | \
+ HFI1_CAP_PRINT_UNIMPL | \
+ HFI1_CAP_STATIC_RATE_CTRL | \
+ HFI1_CAP_QSFP_ENABLED | \
+ HFI1_CAP_PKEY_CHECK | \
+ HFI1_CAP_MULTI_PKT_EGR | \
+ HFI1_CAP_EXTENDED_PSN | \
+ ((HFI1_CAP_HDRSUPP | \
+ HFI1_CAP_MULTI_PKT_EGR | \
+ HFI1_CAP_STATIC_RATE_CTRL | \
+ HFI1_CAP_PKEY_CHECK | \
+ HFI1_CAP_EARLY_CREDIT_RETURN) << \
+ HFI1_CAP_USER_SHIFT))
+/*
+ * A bitmask of kernel/global capabilities that should be communicated
+ * to user level processes.
+ */
+#define HFI1_CAP_K2U (HFI1_CAP_SDMA | \
+ HFI1_CAP_EXTENDED_PSN | \
+ HFI1_CAP_PKEY_CHECK | \
+ HFI1_CAP_NO_INTEGRITY)
+
+#define HFI1_USER_SWVERSION ((HFI1_USER_SWMAJOR << 16) | HFI1_USER_SWMINOR)
+
+#ifndef HFI1_KERN_TYPE
+#define HFI1_KERN_TYPE 0
+#endif
+
+/*
+ * Similarly, this is the kernel version going back to the user. It's
+ * slightly different, in that we want to tell if the driver was built as
+ * part of a Intel release, or from the driver from openfabrics.org,
+ * kernel.org, or a standard distribution, for support reasons.
+ * The high bit is 0 for non-Intel and 1 for Intel-built/supplied.
+ *
+ * It's returned by the driver to the user code during initialization in the
+ * spi_sw_version field of hfi1_base_info, so the user code can in turn
+ * check for compatibility with the kernel.
+*/
+#define HFI1_KERN_SWVERSION ((HFI1_KERN_TYPE << 31) | HFI1_USER_SWVERSION)
+
+/*
+ * Define the driver version number. This is something that refers only
+ * to the driver itself, not the software interfaces it supports.
+ */
+#ifndef HFI1_DRIVER_VERSION_BASE
+#define HFI1_DRIVER_VERSION_BASE "0.9-248"
+#endif
+
+/* create the final driver version string */
+#ifdef HFI1_IDSTR
+#define HFI1_DRIVER_VERSION HFI1_DRIVER_VERSION_BASE " " HFI1_IDSTR
+#else
+#define HFI1_DRIVER_VERSION HFI1_DRIVER_VERSION_BASE
+#endif
+
+/*
+ * Diagnostics can send a packet by writing the following
+ * struct to the diag packet special file.
+ *
+ * This allows a custom PBC qword, so that special modes and deliberate
+ * changes to CRCs can be used.
+ */
+#define _DIAG_PKT_VERS 1
+struct diag_pkt {
+ __u16 version; /* structure version */
+ __u16 unit; /* which device */
+ __u16 sw_index; /* send sw index to use */
+ __u16 len; /* data length, in bytes */
+ __u16 port; /* port number */
+ __u16 unused;
+ __u32 flags; /* call flags */
+ __u64 data; /* user data pointer */
+ __u64 pbc; /* PBC for the packet */
+};
+
+/* diag_pkt flags */
+#define F_DIAGPKT_WAIT 0x1 /* wait until packet is sent */
+
+/*
+ * The next set of defines are for packet headers, and chip register
+ * and memory bits that are visible to and/or used by user-mode software.
+ */
+
+/*
+ * Receive Header Flags
+ */
+#define RHF_PKT_LEN_SHIFT 0
+#define RHF_PKT_LEN_MASK 0xfffull
+#define RHF_PKT_LEN_SMASK (RHF_PKT_LEN_MASK << RHF_PKT_LEN_SHIFT)
+
+#define RHF_RCV_TYPE_SHIFT 12
+#define RHF_RCV_TYPE_MASK 0x7ull
+#define RHF_RCV_TYPE_SMASK (RHF_RCV_TYPE_MASK << RHF_RCV_TYPE_SHIFT)
+
+#define RHF_USE_EGR_BFR_SHIFT 15
+#define RHF_USE_EGR_BFR_MASK 0x1ull
+#define RHF_USE_EGR_BFR_SMASK (RHF_USE_EGR_BFR_MASK << RHF_USE_EGR_BFR_SHIFT)
+
+#define RHF_EGR_INDEX_SHIFT 16
+#define RHF_EGR_INDEX_MASK 0x7ffull
+#define RHF_EGR_INDEX_SMASK (RHF_EGR_INDEX_MASK << RHF_EGR_INDEX_SHIFT)
+
+#define RHF_DC_INFO_SHIFT 27
+#define RHF_DC_INFO_MASK 0x1ull
+#define RHF_DC_INFO_SMASK (RHF_DC_INFO_MASK << RHF_DC_INFO_SHIFT)
+
+#define RHF_RCV_SEQ_SHIFT 28
+#define RHF_RCV_SEQ_MASK 0xfull
+#define RHF_RCV_SEQ_SMASK (RHF_RCV_SEQ_MASK << RHF_RCV_SEQ_SHIFT)
+
+#define RHF_EGR_OFFSET_SHIFT 32
+#define RHF_EGR_OFFSET_MASK 0xfffull
+#define RHF_EGR_OFFSET_SMASK (RHF_EGR_OFFSET_MASK << RHF_EGR_OFFSET_SHIFT)
+#define RHF_HDRQ_OFFSET_SHIFT 44
+#define RHF_HDRQ_OFFSET_MASK 0x1ffull
+#define RHF_HDRQ_OFFSET_SMASK (RHF_HDRQ_OFFSET_MASK << RHF_HDRQ_OFFSET_SHIFT)
+#define RHF_K_HDR_LEN_ERR (0x1ull << 53)
+#define RHF_DC_UNC_ERR (0x1ull << 54)
+#define RHF_DC_ERR (0x1ull << 55)
+#define RHF_RCV_TYPE_ERR_SHIFT 56
+#define RHF_RCV_TYPE_ERR_MASK 0x7ul
+#define RHF_RCV_TYPE_ERR_SMASK (RHF_RCV_TYPE_ERR_MASK << RHF_RCV_TYPE_ERR_SHIFT)
+#define RHF_TID_ERR (0x1ull << 59)
+#define RHF_LEN_ERR (0x1ull << 60)
+#define RHF_ECC_ERR (0x1ull << 61)
+#define RHF_VCRC_ERR (0x1ull << 62)
+#define RHF_ICRC_ERR (0x1ull << 63)
+
+#define RHF_ERROR_SMASK 0xffe0000000000000ull /* bits 63:53 */
+
+/* RHF receive types */
+#define RHF_RCV_TYPE_EXPECTED 0
+#define RHF_RCV_TYPE_EAGER 1
+#define RHF_RCV_TYPE_IB 2 /* normal IB, IB Raw, or IPv6 */
+#define RHF_RCV_TYPE_ERROR 3
+#define RHF_RCV_TYPE_BYPASS 4
+#define RHF_RCV_TYPE_INVALID5 5
+#define RHF_RCV_TYPE_INVALID6 6
+#define RHF_RCV_TYPE_INVALID7 7
+
+/* RHF receive type error - expected packet errors */
+#define RHF_RTE_EXPECTED_FLOW_SEQ_ERR 0x2
+#define RHF_RTE_EXPECTED_FLOW_GEN_ERR 0x4
+
+/* RHF receive type error - eager packet errors */
+#define RHF_RTE_EAGER_NO_ERR 0x0
+
+/* RHF receive type error - IB packet errors */
+#define RHF_RTE_IB_NO_ERR 0x0
+
+/* RHF receive type error - error packet errors */
+#define RHF_RTE_ERROR_NO_ERR 0x0
+#define RHF_RTE_ERROR_OP_CODE_ERR 0x1
+#define RHF_RTE_ERROR_KHDR_MIN_LEN_ERR 0x2
+#define RHF_RTE_ERROR_KHDR_HCRC_ERR 0x3
+#define RHF_RTE_ERROR_KHDR_KVER_ERR 0x4
+#define RHF_RTE_ERROR_CONTEXT_ERR 0x5
+#define RHF_RTE_ERROR_KHDR_TID_ERR 0x6
+
+/* RHF receive type error - bypass packet errors */
+#define RHF_RTE_BYPASS_NO_ERR 0x0
+
+/*
+ * This structure contains the first field common to all protocols
+ * that employ this chip.
+ */
+struct hfi1_message_header {
+ __be16 lrh[4];
+};
+
+/* IB - LRH header constants */
+#define HFI1_LRH_GRH 0x0003 /* 1. word of IB LRH - next header: GRH */
+#define HFI1_LRH_BTH 0x0002 /* 1. word of IB LRH - next header: BTH */
+
+/* misc. */
+#define SIZE_OF_CRC 1
+
+#define LIM_MGMT_P_KEY 0x7FFF
+#define FULL_MGMT_P_KEY 0xFFFF
+
+#define DEFAULT_P_KEY LIM_MGMT_P_KEY
+#define HFI1_PERMISSIVE_LID 0xFFFF
+#define HFI1_AETH_CREDIT_SHIFT 24
+#define HFI1_AETH_CREDIT_MASK 0x1F
+#define HFI1_AETH_CREDIT_INVAL 0x1F
+#define HFI1_MSN_MASK 0xFFFFFF
+#define HFI1_QPN_MASK 0xFFFFFF
+#define HFI1_FECN_SHIFT 31
+#define HFI1_FECN_MASK 1
+#define HFI1_FECN_SMASK (1 << HFI1_FECN_SHIFT)
+#define HFI1_BECN_SHIFT 30
+#define HFI1_BECN_MASK 1
+#define HFI1_BECN_SMASK (1 << HFI1_BECN_SHIFT)
+#define HFI1_MULTICAST_LID_BASE 0xC000
+
+static inline __u64 rhf_to_cpu(const __le32 *rbuf)
+{
+ return __le64_to_cpu(*((__le64 *)rbuf));
+}
+
+static inline u64 rhf_err_flags(u64 rhf)
+{
+ return rhf & RHF_ERROR_SMASK;
+}
+
+static inline u32 rhf_rcv_type(u64 rhf)
+{
+ return (rhf >> RHF_RCV_TYPE_SHIFT) & RHF_RCV_TYPE_MASK;
+}
+
+static inline u32 rhf_rcv_type_err(u64 rhf)
+{
+ return (rhf >> RHF_RCV_TYPE_ERR_SHIFT) & RHF_RCV_TYPE_ERR_MASK;
+}
+
+/* return size is in bytes, not DWORDs */
+static inline u32 rhf_pkt_len(u64 rhf)
+{
+ return ((rhf & RHF_PKT_LEN_SMASK) >> RHF_PKT_LEN_SHIFT) << 2;
+}
+
+static inline u32 rhf_egr_index(u64 rhf)
+{
+ return (rhf >> RHF_EGR_INDEX_SHIFT) & RHF_EGR_INDEX_MASK;
+}
+
+static inline u32 rhf_rcv_seq(u64 rhf)
+{
+ return (rhf >> RHF_RCV_SEQ_SHIFT) & RHF_RCV_SEQ_MASK;
+}
+
+/* returned offset is in DWORDS */
+static inline u32 rhf_hdrq_offset(u64 rhf)
+{
+ return (rhf >> RHF_HDRQ_OFFSET_SHIFT) & RHF_HDRQ_OFFSET_MASK;
+}
+
+static inline u64 rhf_use_egr_bfr(u64 rhf)
+{
+ return rhf & RHF_USE_EGR_BFR_SMASK;
+}
+
+static inline u64 rhf_dc_info(u64 rhf)
+{
+ return rhf & RHF_DC_INFO_SMASK;
+}
+
+static inline u32 rhf_egr_buf_offset(u64 rhf)
+{
+ return (rhf >> RHF_EGR_OFFSET_SHIFT) & RHF_EGR_OFFSET_MASK;
+}
+#endif /* _COMMON_H */
diff --git a/drivers/staging/rdma/hfi1/cq.c b/drivers/staging/rdma/hfi1/cq.c
new file mode 100644
index 0000000..4f046ff
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/cq.c
@@ -0,0 +1,558 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/kthread.h>
+
+#include "verbs.h"
+#include "hfi.h"
+
+/**
+ * hfi1_cq_enter - add a new entry to the completion queue
+ * @cq: completion queue
+ * @entry: work completion entry to add
+ * @sig: true if @entry is a solicited entry
+ *
+ * This may be called with qp->s_lock held.
+ */
+void hfi1_cq_enter(struct hfi1_cq *cq, struct ib_wc *entry, int solicited)
+{
+ struct hfi1_cq_wc *wc;
+ unsigned long flags;
+ u32 head;
+ u32 next;
+
+ spin_lock_irqsave(&cq->lock, flags);
+
+ /*
+ * Note that the head pointer might be writable by user processes.
+ * Take care to verify it is a sane value.
+ */
+ wc = cq->queue;
+ head = wc->head;
+ if (head >= (unsigned) cq->ibcq.cqe) {
+ head = cq->ibcq.cqe;
+ next = 0;
+ } else
+ next = head + 1;
+ if (unlikely(next == wc->tail)) {
+ spin_unlock_irqrestore(&cq->lock, flags);
+ if (cq->ibcq.event_handler) {
+ struct ib_event ev;
+
+ ev.device = cq->ibcq.device;
+ ev.element.cq = &cq->ibcq;
+ ev.event = IB_EVENT_CQ_ERR;
+ cq->ibcq.event_handler(&ev, cq->ibcq.cq_context);
+ }
+ return;
+ }
+ if (cq->ip) {
+ wc->uqueue[head].wr_id = entry->wr_id;
+ wc->uqueue[head].status = entry->status;
+ wc->uqueue[head].opcode = entry->opcode;
+ wc->uqueue[head].vendor_err = entry->vendor_err;
+ wc->uqueue[head].byte_len = entry->byte_len;
+ wc->uqueue[head].ex.imm_data =
+ (__u32 __force)entry->ex.imm_data;
+ wc->uqueue[head].qp_num = entry->qp->qp_num;
+ wc->uqueue[head].src_qp = entry->src_qp;
+ wc->uqueue[head].wc_flags = entry->wc_flags;
+ wc->uqueue[head].pkey_index = entry->pkey_index;
+ wc->uqueue[head].slid = entry->slid;
+ wc->uqueue[head].sl = entry->sl;
+ wc->uqueue[head].dlid_path_bits = entry->dlid_path_bits;
+ wc->uqueue[head].port_num = entry->port_num;
+ /* Make sure entry is written before the head index. */
+ smp_wmb();
+ } else
+ wc->kqueue[head] = *entry;
+ wc->head = next;
+
+ if (cq->notify == IB_CQ_NEXT_COMP ||
+ (cq->notify == IB_CQ_SOLICITED &&
+ (solicited || entry->status != IB_WC_SUCCESS))) {
+ struct kthread_worker *worker;
+ /*
+ * This will cause send_complete() to be called in
+ * another thread.
+ */
+ smp_read_barrier_depends(); /* see hfi1_cq_exit */
+ worker = cq->dd->worker;
+ if (likely(worker)) {
+ cq->notify = IB_CQ_NONE;
+ cq->triggered++;
+ queue_kthread_work(worker, &cq->comptask);
+ }
+ }
+
+ spin_unlock_irqrestore(&cq->lock, flags);
+}
+
+/**
+ * hfi1_poll_cq - poll for work completion entries
+ * @ibcq: the completion queue to poll
+ * @num_entries: the maximum number of entries to return
+ * @entry: pointer to array where work completions are placed
+ *
+ * Returns the number of completion entries polled.
+ *
+ * This may be called from interrupt context. Also called by ib_poll_cq()
+ * in the generic verbs code.
+ */
+int hfi1_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
+{
+ struct hfi1_cq *cq = to_icq(ibcq);
+ struct hfi1_cq_wc *wc;
+ unsigned long flags;
+ int npolled;
+ u32 tail;
+
+ /* The kernel can only poll a kernel completion queue */
+ if (cq->ip) {
+ npolled = -EINVAL;
+ goto bail;
+ }
+
+ spin_lock_irqsave(&cq->lock, flags);
+
+ wc = cq->queue;
+ tail = wc->tail;
+ if (tail > (u32) cq->ibcq.cqe)
+ tail = (u32) cq->ibcq.cqe;
+ for (npolled = 0; npolled < num_entries; ++npolled, ++entry) {
+ if (tail == wc->head)
+ break;
+ /* The kernel doesn't need a RMB since it has the lock. */
+ *entry = wc->kqueue[tail];
+ if (tail >= cq->ibcq.cqe)
+ tail = 0;
+ else
+ tail++;
+ }
+ wc->tail = tail;
+
+ spin_unlock_irqrestore(&cq->lock, flags);
+
+bail:
+ return npolled;
+}
+
+static void send_complete(struct kthread_work *work)
+{
+ struct hfi1_cq *cq = container_of(work, struct hfi1_cq, comptask);
+
+ /*
+ * The completion handler will most likely rearm the notification
+ * and poll for all pending entries. If a new completion entry
+ * is added while we are in this routine, queue_work()
+ * won't call us again until we return so we check triggered to
+ * see if we need to call the handler again.
+ */
+ for (;;) {
+ u8 triggered = cq->triggered;
+
+ /*
+ * IPoIB connected mode assumes the callback is from a
+ * soft IRQ. We simulate this by blocking "bottom halves".
+ * See the implementation for ipoib_cm_handle_tx_wc(),
+ * netif_tx_lock_bh() and netif_tx_lock().
+ */
+ local_bh_disable();
+ cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
+ local_bh_enable();
+
+ if (cq->triggered == triggered)
+ return;
+ }
+}
+
+/**
+ * hfi1_create_cq - create a completion queue
+ * @ibdev: the device this completion queue is attached to
+ * @attr: creation attributes
+ * @context: unused by the driver
+ * @udata: user data for libibverbs.so
+ *
+ * Returns a pointer to the completion queue or negative errno values
+ * for failure.
+ *
+ * Called by ib_create_cq() in the generic verbs code.
+ */
+struct ib_cq *hfi1_create_cq(
+ struct ib_device *ibdev,
+ const struct ib_cq_init_attr *attr,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct hfi1_ibdev *dev = to_idev(ibdev);
+ struct hfi1_cq *cq;
+ struct hfi1_cq_wc *wc;
+ struct ib_cq *ret;
+ u32 sz;
+ unsigned int entries = attr->cqe;
+
+ if (attr->flags)
+ return ERR_PTR(-EINVAL);
+
+ if (entries < 1 || entries > hfi1_max_cqes)
+ return ERR_PTR(-EINVAL);
+
+ /* Allocate the completion queue structure. */
+ cq = kmalloc(sizeof(*cq), GFP_KERNEL);
+ if (!cq)
+ return ERR_PTR(-ENOMEM);
+
+ /*
+ * Allocate the completion queue entries and head/tail pointers.
+ * This is allocated separately so that it can be resized and
+ * also mapped into user space.
+ * We need to use vmalloc() in order to support mmap and large
+ * numbers of entries.
+ */
+ sz = sizeof(*wc);
+ if (udata && udata->outlen >= sizeof(__u64))
+ sz += sizeof(struct ib_uverbs_wc) * (entries + 1);
+ else
+ sz += sizeof(struct ib_wc) * (entries + 1);
+ wc = vmalloc_user(sz);
+ if (!wc) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_cq;
+ }
+
+ /*
+ * Return the address of the WC as the offset to mmap.
+ * See hfi1_mmap() for details.
+ */
+ if (udata && udata->outlen >= sizeof(__u64)) {
+ int err;
+
+ cq->ip = hfi1_create_mmap_info(dev, sz, context, wc);
+ if (!cq->ip) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_wc;
+ }
+
+ err = ib_copy_to_udata(udata, &cq->ip->offset,
+ sizeof(cq->ip->offset));
+ if (err) {
+ ret = ERR_PTR(err);
+ goto bail_ip;
+ }
+ } else
+ cq->ip = NULL;
+
+ spin_lock(&dev->n_cqs_lock);
+ if (dev->n_cqs_allocated == hfi1_max_cqs) {
+ spin_unlock(&dev->n_cqs_lock);
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_ip;
+ }
+
+ dev->n_cqs_allocated++;
+ spin_unlock(&dev->n_cqs_lock);
+
+ if (cq->ip) {
+ spin_lock_irq(&dev->pending_lock);
+ list_add(&cq->ip->pending_mmaps, &dev->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+ }
+
+ /*
+ * ib_create_cq() will initialize cq->ibcq except for cq->ibcq.cqe.
+ * The number of entries should be >= the number requested or return
+ * an error.
+ */
+ cq->dd = dd_from_dev(dev);
+ cq->ibcq.cqe = entries;
+ cq->notify = IB_CQ_NONE;
+ cq->triggered = 0;
+ spin_lock_init(&cq->lock);
+ init_kthread_work(&cq->comptask, send_complete);
+ wc->head = 0;
+ wc->tail = 0;
+ cq->queue = wc;
+
+ ret = &cq->ibcq;
+
+ goto done;
+
+bail_ip:
+ kfree(cq->ip);
+bail_wc:
+ vfree(wc);
+bail_cq:
+ kfree(cq);
+done:
+ return ret;
+}
+
+/**
+ * hfi1_destroy_cq - destroy a completion queue
+ * @ibcq: the completion queue to destroy.
+ *
+ * Returns 0 for success.
+ *
+ * Called by ib_destroy_cq() in the generic verbs code.
+ */
+int hfi1_destroy_cq(struct ib_cq *ibcq)
+{
+ struct hfi1_ibdev *dev = to_idev(ibcq->device);
+ struct hfi1_cq *cq = to_icq(ibcq);
+
+ flush_kthread_work(&cq->comptask);
+ spin_lock(&dev->n_cqs_lock);
+ dev->n_cqs_allocated--;
+ spin_unlock(&dev->n_cqs_lock);
+ if (cq->ip)
+ kref_put(&cq->ip->ref, hfi1_release_mmap_info);
+ else
+ vfree(cq->queue);
+ kfree(cq);
+
+ return 0;
+}
+
+/**
+ * hfi1_req_notify_cq - change the notification type for a completion queue
+ * @ibcq: the completion queue
+ * @notify_flags: the type of notification to request
+ *
+ * Returns 0 for success.
+ *
+ * This may be called from interrupt context. Also called by
+ * ib_req_notify_cq() in the generic verbs code.
+ */
+int hfi1_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
+{
+ struct hfi1_cq *cq = to_icq(ibcq);
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&cq->lock, flags);
+ /*
+ * Don't change IB_CQ_NEXT_COMP to IB_CQ_SOLICITED but allow
+ * any other transitions (see C11-31 and C11-32 in ch. 11.4.2.2).
+ */
+ if (cq->notify != IB_CQ_NEXT_COMP)
+ cq->notify = notify_flags & IB_CQ_SOLICITED_MASK;
+
+ if ((notify_flags & IB_CQ_REPORT_MISSED_EVENTS) &&
+ cq->queue->head != cq->queue->tail)
+ ret = 1;
+
+ spin_unlock_irqrestore(&cq->lock, flags);
+
+ return ret;
+}
+
+/**
+ * hfi1_resize_cq - change the size of the CQ
+ * @ibcq: the completion queue
+ *
+ * Returns 0 for success.
+ */
+int hfi1_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
+{
+ struct hfi1_cq *cq = to_icq(ibcq);
+ struct hfi1_cq_wc *old_wc;
+ struct hfi1_cq_wc *wc;
+ u32 head, tail, n;
+ int ret;
+ u32 sz;
+
+ if (cqe < 1 || cqe > hfi1_max_cqes) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ /*
+ * Need to use vmalloc() if we want to support large #s of entries.
+ */
+ sz = sizeof(*wc);
+ if (udata && udata->outlen >= sizeof(__u64))
+ sz += sizeof(struct ib_uverbs_wc) * (cqe + 1);
+ else
+ sz += sizeof(struct ib_wc) * (cqe + 1);
+ wc = vmalloc_user(sz);
+ if (!wc) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ /* Check that we can write the offset to mmap. */
+ if (udata && udata->outlen >= sizeof(__u64)) {
+ __u64 offset = 0;
+
+ ret = ib_copy_to_udata(udata, &offset, sizeof(offset));
+ if (ret)
+ goto bail_free;
+ }
+
+ spin_lock_irq(&cq->lock);
+ /*
+ * Make sure head and tail are sane since they
+ * might be user writable.
+ */
+ old_wc = cq->queue;
+ head = old_wc->head;
+ if (head > (u32) cq->ibcq.cqe)
+ head = (u32) cq->ibcq.cqe;
+ tail = old_wc->tail;
+ if (tail > (u32) cq->ibcq.cqe)
+ tail = (u32) cq->ibcq.cqe;
+ if (head < tail)
+ n = cq->ibcq.cqe + 1 + head - tail;
+ else
+ n = head - tail;
+ if (unlikely((u32)cqe < n)) {
+ ret = -EINVAL;
+ goto bail_unlock;
+ }
+ for (n = 0; tail != head; n++) {
+ if (cq->ip)
+ wc->uqueue[n] = old_wc->uqueue[tail];
+ else
+ wc->kqueue[n] = old_wc->kqueue[tail];
+ if (tail == (u32) cq->ibcq.cqe)
+ tail = 0;
+ else
+ tail++;
+ }
+ cq->ibcq.cqe = cqe;
+ wc->head = n;
+ wc->tail = 0;
+ cq->queue = wc;
+ spin_unlock_irq(&cq->lock);
+
+ vfree(old_wc);
+
+ if (cq->ip) {
+ struct hfi1_ibdev *dev = to_idev(ibcq->device);
+ struct hfi1_mmap_info *ip = cq->ip;
+
+ hfi1_update_mmap_info(dev, ip, sz, wc);
+
+ /*
+ * Return the offset to mmap.
+ * See hfi1_mmap() for details.
+ */
+ if (udata && udata->outlen >= sizeof(__u64)) {
+ ret = ib_copy_to_udata(udata, &ip->offset,
+ sizeof(ip->offset));
+ if (ret)
+ goto bail;
+ }
+
+ spin_lock_irq(&dev->pending_lock);
+ if (list_empty(&ip->pending_mmaps))
+ list_add(&ip->pending_mmaps, &dev->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+ }
+
+ ret = 0;
+ goto bail;
+
+bail_unlock:
+ spin_unlock_irq(&cq->lock);
+bail_free:
+ vfree(wc);
+bail:
+ return ret;
+}
+
+int hfi1_cq_init(struct hfi1_devdata *dd)
+{
+ int ret = 0;
+ int cpu;
+ struct task_struct *task;
+
+ if (dd->worker)
+ return 0;
+ dd->worker = kzalloc(sizeof(*dd->worker), GFP_KERNEL);
+ if (!dd->worker)
+ return -ENOMEM;
+ init_kthread_worker(dd->worker);
+ task = kthread_create_on_node(
+ kthread_worker_fn,
+ dd->worker,
+ dd->assigned_node_id,
+ "hfi1_cq%d", dd->unit);
+ if (IS_ERR(task))
+ goto task_fail;
+ cpu = cpumask_first(cpumask_of_node(dd->assigned_node_id));
+ kthread_bind(task, cpu);
+ wake_up_process(task);
+out:
+ return ret;
+task_fail:
+ ret = PTR_ERR(task);
+ kfree(dd->worker);
+ dd->worker = NULL;
+ goto out;
+}
+
+void hfi1_cq_exit(struct hfi1_devdata *dd)
+{
+ struct kthread_worker *worker;
+
+ worker = dd->worker;
+ if (!worker)
+ return;
+ /* blocks future queuing from send_complete() */
+ dd->worker = NULL;
+ smp_wmb(); /* See hfi1_cq_enter */
+ flush_kthread_worker(worker);
+ kthread_stop(worker->task);
+ kfree(worker);
+}
diff --git a/drivers/staging/rdma/hfi1/debugfs.c b/drivers/staging/rdma/hfi1/debugfs.c
new file mode 100644
index 0000000..acd2269
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/debugfs.c
@@ -0,0 +1,899 @@
+#ifdef CONFIG_DEBUG_FS
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+
+#include "hfi.h"
+#include "debugfs.h"
+#include "device.h"
+#include "qp.h"
+#include "sdma.h"
+
+static struct dentry *hfi1_dbg_root;
+
+#define private2dd(file) (file_inode(file)->i_private)
+#define private2ppd(file) (file_inode(file)->i_private)
+
+#define DEBUGFS_SEQ_FILE_OPS(name) \
+static const struct seq_operations _##name##_seq_ops = { \
+ .start = _##name##_seq_start, \
+ .next = _##name##_seq_next, \
+ .stop = _##name##_seq_stop, \
+ .show = _##name##_seq_show \
+}
+#define DEBUGFS_SEQ_FILE_OPEN(name) \
+static int _##name##_open(struct inode *inode, struct file *s) \
+{ \
+ struct seq_file *seq; \
+ int ret; \
+ ret = seq_open(s, &_##name##_seq_ops); \
+ if (ret) \
+ return ret; \
+ seq = s->private_data; \
+ seq->private = inode->i_private; \
+ return 0; \
+}
+
+#define DEBUGFS_FILE_OPS(name) \
+static const struct file_operations _##name##_file_ops = { \
+ .owner = THIS_MODULE, \
+ .open = _##name##_open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = seq_release \
+}
+
+#define DEBUGFS_FILE_CREATE(name, parent, data, ops, mode) \
+do { \
+ struct dentry *ent; \
+ ent = debugfs_create_file(name, mode, parent, \
+ data, ops); \
+ if (!ent) \
+ pr_warn("create of %s failed\n", name); \
+} while (0)
+
+
+#define DEBUGFS_SEQ_FILE_CREATE(name, parent, data) \
+ DEBUGFS_FILE_CREATE(#name, parent, data, &_##name##_file_ops, S_IRUGO)
+
+static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
+__acquires(RCU)
+{
+ struct hfi1_opcode_stats_perctx *opstats;
+
+ rcu_read_lock();
+ if (*pos >= ARRAY_SIZE(opstats->stats))
+ return NULL;
+ return pos;
+}
+
+static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ struct hfi1_opcode_stats_perctx *opstats;
+
+ ++*pos;
+ if (*pos >= ARRAY_SIZE(opstats->stats))
+ return NULL;
+ return pos;
+}
+
+
+static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
+__releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static int _opcode_stats_seq_show(struct seq_file *s, void *v)
+{
+ loff_t *spos = v;
+ loff_t i = *spos, j;
+ u64 n_packets = 0, n_bytes = 0;
+ struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+
+ for (j = 0; j < dd->first_user_ctxt; j++) {
+ if (!dd->rcd[j])
+ continue;
+ n_packets += dd->rcd[j]->opstats->stats[i].n_packets;
+ n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes;
+ }
+ if (!n_packets && !n_bytes)
+ return SEQ_SKIP;
+ seq_printf(s, "%02llx %llu/%llu\n", i,
+ (unsigned long long) n_packets,
+ (unsigned long long) n_bytes);
+
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(opcode_stats);
+DEBUGFS_SEQ_FILE_OPEN(opcode_stats)
+DEBUGFS_FILE_OPS(opcode_stats);
+
+static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
+{
+ struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+
+ if (!*pos)
+ return SEQ_START_TOKEN;
+ if (*pos >= dd->first_user_ctxt)
+ return NULL;
+ return pos;
+}
+
+static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+
+ if (v == SEQ_START_TOKEN)
+ return pos;
+
+ ++*pos;
+ if (*pos >= dd->first_user_ctxt)
+ return NULL;
+ return pos;
+}
+
+static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
+{
+ /* nothing allocated */
+}
+
+static int _ctx_stats_seq_show(struct seq_file *s, void *v)
+{
+ loff_t *spos;
+ loff_t i, j;
+ u64 n_packets = 0;
+ struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+
+ if (v == SEQ_START_TOKEN) {
+ seq_puts(s, "Ctx:npkts\n");
+ return 0;
+ }
+
+ spos = v;
+ i = *spos;
+
+ if (!dd->rcd[i])
+ return SEQ_SKIP;
+
+ for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++)
+ n_packets += dd->rcd[i]->opstats->stats[j].n_packets;
+
+ if (!n_packets)
+ return SEQ_SKIP;
+
+ seq_printf(s, " %llu:%llu\n", i, n_packets);
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(ctx_stats);
+DEBUGFS_SEQ_FILE_OPEN(ctx_stats)
+DEBUGFS_FILE_OPS(ctx_stats);
+
+static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
+__acquires(RCU)
+{
+ struct qp_iter *iter;
+ loff_t n = *pos;
+
+ rcu_read_lock();
+ iter = qp_iter_init(s->private);
+ if (!iter)
+ return NULL;
+
+ while (n--) {
+ if (qp_iter_next(iter)) {
+ kfree(iter);
+ return NULL;
+ }
+ }
+
+ return iter;
+}
+
+static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
+ loff_t *pos)
+{
+ struct qp_iter *iter = iter_ptr;
+
+ (*pos)++;
+
+ if (qp_iter_next(iter)) {
+ kfree(iter);
+ return NULL;
+ }
+
+ return iter;
+}
+
+static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
+__releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
+{
+ struct qp_iter *iter = iter_ptr;
+
+ if (!iter)
+ return 0;
+
+ qp_iter_print(s, iter);
+
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(qp_stats);
+DEBUGFS_SEQ_FILE_OPEN(qp_stats)
+DEBUGFS_FILE_OPS(qp_stats);
+
+static void *_sdes_seq_start(struct seq_file *s, loff_t *pos)
+__acquires(RCU)
+{
+ struct hfi1_ibdev *ibd;
+ struct hfi1_devdata *dd;
+
+ rcu_read_lock();
+ ibd = (struct hfi1_ibdev *)s->private;
+ dd = dd_from_dev(ibd);
+ if (!dd->per_sdma || *pos >= dd->num_sdma)
+ return NULL;
+ return pos;
+}
+
+static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+
+ ++*pos;
+ if (!dd->per_sdma || *pos >= dd->num_sdma)
+ return NULL;
+ return pos;
+}
+
+
+static void _sdes_seq_stop(struct seq_file *s, void *v)
+__releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static int _sdes_seq_show(struct seq_file *s, void *v)
+{
+ struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+ loff_t *spos = v;
+ loff_t i = *spos;
+
+ sdma_seqfile_dump_sde(s, &dd->per_sdma[i]);
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(sdes);
+DEBUGFS_SEQ_FILE_OPEN(sdes)
+DEBUGFS_FILE_OPS(sdes);
+
+/* read the per-device counters */
+static ssize_t dev_counters_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ u64 *counters;
+ size_t avail;
+ struct hfi1_devdata *dd;
+ ssize_t rval;
+
+ rcu_read_lock();
+ dd = private2dd(file);
+ avail = hfi1_read_cntrs(dd, *ppos, NULL, &counters);
+ rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
+ rcu_read_unlock();
+ return rval;
+}
+
+/* read the per-device counters */
+static ssize_t dev_names_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char *names;
+ size_t avail;
+ struct hfi1_devdata *dd;
+ ssize_t rval;
+
+ rcu_read_lock();
+ dd = private2dd(file);
+ avail = hfi1_read_cntrs(dd, *ppos, &names, NULL);
+ rval = simple_read_from_buffer(buf, count, ppos, names, avail);
+ rcu_read_unlock();
+ return rval;
+}
+
+struct counter_info {
+ char *name;
+ const struct file_operations ops;
+};
+
+/*
+ * Could use file_inode(file)->i_ino to figure out which file,
+ * instead of separate routine for each, but for now, this works...
+ */
+
+/* read the per-port names (same for each port) */
+static ssize_t portnames_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char *names;
+ size_t avail;
+ struct hfi1_devdata *dd;
+ ssize_t rval;
+
+ rcu_read_lock();
+ dd = private2dd(file);
+ /* port number n/a here since names are constant */
+ avail = hfi1_read_portcntrs(dd, *ppos, 0, &names, NULL);
+ rval = simple_read_from_buffer(buf, count, ppos, names, avail);
+ rcu_read_unlock();
+ return rval;
+}
+
+/* read the per-port counters */
+static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ u64 *counters;
+ size_t avail;
+ struct hfi1_devdata *dd;
+ struct hfi1_pportdata *ppd;
+ ssize_t rval;
+
+ rcu_read_lock();
+ ppd = private2ppd(file);
+ dd = ppd->dd;
+ avail = hfi1_read_portcntrs(dd, *ppos, ppd->port - 1, NULL, &counters);
+ rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
+ rcu_read_unlock();
+ return rval;
+}
+
+/*
+ * read the per-port QSFP data for ppd
+ */
+static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct hfi1_pportdata *ppd;
+ char *tmp;
+ int ret;
+
+ rcu_read_lock();
+ ppd = private2ppd(file);
+ tmp = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!tmp) {
+ rcu_read_unlock();
+ return -ENOMEM;
+ }
+
+ ret = qsfp_dump(ppd, tmp, PAGE_SIZE);
+ if (ret > 0)
+ ret = simple_read_from_buffer(buf, count, ppos, tmp, ret);
+ rcu_read_unlock();
+ kfree(tmp);
+ return ret;
+}
+
+/* Do an i2c write operation on the chain for the given HFI. */
+static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos, u32 target)
+{
+ struct hfi1_pportdata *ppd;
+ char *buff;
+ int ret;
+ int i2c_addr;
+ int offset;
+ int total_written;
+
+ rcu_read_lock();
+ ppd = private2ppd(file);
+
+ buff = kmalloc(count, GFP_KERNEL);
+ if (!buff) {
+ ret = -ENOMEM;
+ goto _return;
+ }
+
+ ret = copy_from_user(buff, buf, count);
+ if (ret > 0) {
+ ret = -EFAULT;
+ goto _free;
+ }
+
+ i2c_addr = (*ppos >> 16) & 0xff;
+ offset = *ppos & 0xffff;
+
+ total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count);
+ if (total_written < 0) {
+ ret = total_written;
+ goto _free;
+ }
+
+ *ppos += total_written;
+
+ ret = total_written;
+
+ _free:
+ kfree(buff);
+ _return:
+ rcu_read_unlock();
+ return ret;
+}
+
+/* Do an i2c write operation on chain for HFI 0. */
+static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __i2c_debugfs_write(file, buf, count, ppos, 0);
+}
+
+/* Do an i2c write operation on chain for HFI 1. */
+static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __i2c_debugfs_write(file, buf, count, ppos, 1);
+}
+
+/* Do an i2c read operation on the chain for the given HFI. */
+static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos, u32 target)
+{
+ struct hfi1_pportdata *ppd;
+ char *buff;
+ int ret;
+ int i2c_addr;
+ int offset;
+ int total_read;
+
+ rcu_read_lock();
+ ppd = private2ppd(file);
+
+ buff = kmalloc(count, GFP_KERNEL);
+ if (!buff) {
+ ret = -ENOMEM;
+ goto _return;
+ }
+
+ i2c_addr = (*ppos >> 16) & 0xff;
+ offset = *ppos & 0xffff;
+
+ total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count);
+ if (total_read < 0) {
+ ret = total_read;
+ goto _free;
+ }
+
+ *ppos += total_read;
+
+ ret = copy_to_user(buf, buff, total_read);
+ if (ret > 0) {
+ ret = -EFAULT;
+ goto _free;
+ }
+
+ ret = total_read;
+
+ _free:
+ kfree(buff);
+ _return:
+ rcu_read_unlock();
+ return ret;
+}
+
+/* Do an i2c read operation on chain for HFI 0. */
+static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __i2c_debugfs_read(file, buf, count, ppos, 0);
+}
+
+/* Do an i2c read operation on chain for HFI 1. */
+static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __i2c_debugfs_read(file, buf, count, ppos, 1);
+}
+
+/* Do a QSFP write operation on the i2c chain for the given HFI. */
+static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos, u32 target)
+{
+ struct hfi1_pportdata *ppd;
+ char *buff;
+ int ret;
+ int total_written;
+
+ rcu_read_lock();
+ if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
+ ret = -EINVAL;
+ goto _return;
+ }
+
+ ppd = private2ppd(file);
+
+ buff = kmalloc(count, GFP_KERNEL);
+ if (!buff) {
+ ret = -ENOMEM;
+ goto _return;
+ }
+
+ ret = copy_from_user(buff, buf, count);
+ if (ret > 0) {
+ ret = -EFAULT;
+ goto _free;
+ }
+
+ total_written = qsfp_write(ppd, target, *ppos, buff, count);
+ if (total_written < 0) {
+ ret = total_written;
+ goto _free;
+ }
+
+ *ppos += total_written;
+
+ ret = total_written;
+
+ _free:
+ kfree(buff);
+ _return:
+ rcu_read_unlock();
+ return ret;
+}
+
+/* Do a QSFP write operation on i2c chain for HFI 0. */
+static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __qsfp_debugfs_write(file, buf, count, ppos, 0);
+}
+
+/* Do a QSFP write operation on i2c chain for HFI 1. */
+static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __qsfp_debugfs_write(file, buf, count, ppos, 1);
+}
+
+/* Do a QSFP read operation on the i2c chain for the given HFI. */
+static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos, u32 target)
+{
+ struct hfi1_pportdata *ppd;
+ char *buff;
+ int ret;
+ int total_read;
+
+ rcu_read_lock();
+ if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
+ ret = -EINVAL;
+ goto _return;
+ }
+
+ ppd = private2ppd(file);
+
+ buff = kmalloc(count, GFP_KERNEL);
+ if (!buff) {
+ ret = -ENOMEM;
+ goto _return;
+ }
+
+ total_read = qsfp_read(ppd, target, *ppos, buff, count);
+ if (total_read < 0) {
+ ret = total_read;
+ goto _free;
+ }
+
+ *ppos += total_read;
+
+ ret = copy_to_user(buf, buff, total_read);
+ if (ret > 0) {
+ ret = -EFAULT;
+ goto _free;
+ }
+
+ ret = total_read;
+
+ _free:
+ kfree(buff);
+ _return:
+ rcu_read_unlock();
+ return ret;
+}
+
+/* Do a QSFP read operation on i2c chain for HFI 0. */
+static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __qsfp_debugfs_read(file, buf, count, ppos, 0);
+}
+
+/* Do a QSFP read operation on i2c chain for HFI 1. */
+static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __qsfp_debugfs_read(file, buf, count, ppos, 1);
+}
+
+#define DEBUGFS_OPS(nm, readroutine, writeroutine) \
+{ \
+ .name = nm, \
+ .ops = { \
+ .read = readroutine, \
+ .write = writeroutine, \
+ .llseek = generic_file_llseek, \
+ }, \
+}
+
+static const struct counter_info cntr_ops[] = {
+ DEBUGFS_OPS("counter_names", dev_names_read, NULL),
+ DEBUGFS_OPS("counters", dev_counters_read, NULL),
+ DEBUGFS_OPS("portcounter_names", portnames_read, NULL),
+};
+
+static const struct counter_info port_cntr_ops[] = {
+ DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL),
+ DEBUGFS_OPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write),
+ DEBUGFS_OPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write),
+ DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL),
+ DEBUGFS_OPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write),
+ DEBUGFS_OPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write),
+};
+
+void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
+{
+ char name[sizeof("port0counters") + 1];
+ char link[10];
+ struct hfi1_devdata *dd = dd_from_dev(ibd);
+ struct hfi1_pportdata *ppd;
+ int unit = dd->unit;
+ int i, j;
+
+ if (!hfi1_dbg_root)
+ return;
+ snprintf(name, sizeof(name), "%s_%d", class_name(), unit);
+ snprintf(link, sizeof(link), "%d", unit);
+ ibd->hfi1_ibdev_dbg = debugfs_create_dir(name, hfi1_dbg_root);
+ if (!ibd->hfi1_ibdev_dbg) {
+ pr_warn("create of %s failed\n", name);
+ return;
+ }
+ ibd->hfi1_ibdev_link =
+ debugfs_create_symlink(link, hfi1_dbg_root, name);
+ if (!ibd->hfi1_ibdev_link) {
+ pr_warn("create of %s symlink failed\n", name);
+ return;
+ }
+ DEBUGFS_SEQ_FILE_CREATE(opcode_stats, ibd->hfi1_ibdev_dbg, ibd);
+ DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd);
+ DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd);
+ DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd);
+ /* dev counter files */
+ for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
+ DEBUGFS_FILE_CREATE(cntr_ops[i].name,
+ ibd->hfi1_ibdev_dbg,
+ dd,
+ &cntr_ops[i].ops, S_IRUGO);
+ /* per port files */
+ for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++)
+ for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) {
+ snprintf(name,
+ sizeof(name),
+ port_cntr_ops[i].name,
+ j + 1);
+ DEBUGFS_FILE_CREATE(name,
+ ibd->hfi1_ibdev_dbg,
+ ppd,
+ &port_cntr_ops[i].ops,
+ port_cntr_ops[i].ops.write == NULL ?
+ S_IRUGO : S_IRUGO|S_IWUSR);
+ }
+}
+
+void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
+{
+ if (!hfi1_dbg_root)
+ goto out;
+ debugfs_remove(ibd->hfi1_ibdev_link);
+ debugfs_remove_recursive(ibd->hfi1_ibdev_dbg);
+out:
+ ibd->hfi1_ibdev_dbg = NULL;
+ synchronize_rcu();
+}
+
+/*
+ * driver stats field names, one line per stat, single string. Used by
+ * programs like hfistats to print the stats in a way which works for
+ * different versions of drivers, without changing program source.
+ * if hfi1_ib_stats changes, this needs to change. Names need to be
+ * 12 chars or less (w/o newline), for proper display by hfistats utility.
+ */
+static const char * const hfi1_statnames[] = {
+ /* must be element 0*/
+ "KernIntr",
+ "ErrorIntr",
+ "Tx_Errs",
+ "Rcv_Errs",
+ "H/W_Errs",
+ "NoPIOBufs",
+ "CtxtsOpen",
+ "RcvLen_Errs",
+ "EgrBufFull",
+ "EgrHdrFull"
+};
+
+static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos)
+__acquires(RCU)
+{
+ rcu_read_lock();
+ if (*pos >= ARRAY_SIZE(hfi1_statnames))
+ return NULL;
+ return pos;
+}
+
+static void *_driver_stats_names_seq_next(
+ struct seq_file *s,
+ void *v,
+ loff_t *pos)
+{
+ ++*pos;
+ if (*pos >= ARRAY_SIZE(hfi1_statnames))
+ return NULL;
+ return pos;
+}
+
+static void _driver_stats_names_seq_stop(struct seq_file *s, void *v)
+__releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static int _driver_stats_names_seq_show(struct seq_file *s, void *v)
+{
+ loff_t *spos = v;
+
+ seq_printf(s, "%s\n", hfi1_statnames[*spos]);
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(driver_stats_names);
+DEBUGFS_SEQ_FILE_OPEN(driver_stats_names)
+DEBUGFS_FILE_OPS(driver_stats_names);
+
+static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos)
+__acquires(RCU)
+{
+ rcu_read_lock();
+ if (*pos >= ARRAY_SIZE(hfi1_statnames))
+ return NULL;
+ return pos;
+}
+
+static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ ++*pos;
+ if (*pos >= ARRAY_SIZE(hfi1_statnames))
+ return NULL;
+ return pos;
+}
+
+static void _driver_stats_seq_stop(struct seq_file *s, void *v)
+__releases(RCU)
+{
+ rcu_read_unlock();
+}
+
+static u64 hfi1_sps_ints(void)
+{
+ unsigned long flags;
+ struct hfi1_devdata *dd;
+ u64 sps_ints = 0;
+
+ spin_lock_irqsave(&hfi1_devs_lock, flags);
+ list_for_each_entry(dd, &hfi1_dev_list, list) {
+ sps_ints += get_all_cpu_total(dd->int_counter);
+ }
+ spin_unlock_irqrestore(&hfi1_devs_lock, flags);
+ return sps_ints;
+}
+
+static int _driver_stats_seq_show(struct seq_file *s, void *v)
+{
+ loff_t *spos = v;
+ char *buffer;
+ u64 *stats = (u64 *)&hfi1_stats;
+ size_t sz = seq_get_buf(s, &buffer);
+
+ if (sz < sizeof(u64))
+ return SEQ_SKIP;
+ /* special case for interrupts */
+ if (*spos == 0)
+ *(u64 *)buffer = hfi1_sps_ints();
+ else
+ *(u64 *)buffer = stats[*spos];
+ seq_commit(s, sizeof(u64));
+ return 0;
+}
+
+DEBUGFS_SEQ_FILE_OPS(driver_stats);
+DEBUGFS_SEQ_FILE_OPEN(driver_stats)
+DEBUGFS_FILE_OPS(driver_stats);
+
+void hfi1_dbg_init(void)
+{
+ hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL);
+ if (!hfi1_dbg_root)
+ pr_warn("init of debugfs failed\n");
+ DEBUGFS_SEQ_FILE_CREATE(driver_stats_names, hfi1_dbg_root, NULL);
+ DEBUGFS_SEQ_FILE_CREATE(driver_stats, hfi1_dbg_root, NULL);
+}
+
+void hfi1_dbg_exit(void)
+{
+ debugfs_remove_recursive(hfi1_dbg_root);
+ hfi1_dbg_root = NULL;
+}
+
+#endif
diff --git a/drivers/staging/rdma/hfi1/debugfs.h b/drivers/staging/rdma/hfi1/debugfs.h
new file mode 100644
index 0000000..92d6fe1
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/debugfs.h
@@ -0,0 +1,78 @@
+#ifndef _HFI1_DEBUGFS_H
+#define _HFI1_DEBUGFS_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+struct hfi1_ibdev;
+#ifdef CONFIG_DEBUG_FS
+void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd);
+void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd);
+void hfi1_dbg_init(void);
+void hfi1_dbg_exit(void);
+#else
+static inline void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
+{
+}
+
+void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
+{
+}
+
+void hfi1_dbg_init(void)
+{
+}
+
+void hfi1_dbg_exit(void)
+{
+}
+
+#endif
+
+#endif /* _HFI1_DEBUGFS_H */
diff --git a/drivers/staging/rdma/hfi1/device.c b/drivers/staging/rdma/hfi1/device.c
new file mode 100644
index 0000000..07c87a87
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/device.c
@@ -0,0 +1,142 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/cdev.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+
+#include "hfi.h"
+#include "device.h"
+
+static struct class *class;
+static dev_t hfi1_dev;
+
+int hfi1_cdev_init(int minor, const char *name,
+ const struct file_operations *fops,
+ struct cdev *cdev, struct device **devp)
+{
+ const dev_t dev = MKDEV(MAJOR(hfi1_dev), minor);
+ struct device *device = NULL;
+ int ret;
+
+ cdev_init(cdev, fops);
+ cdev->owner = THIS_MODULE;
+ kobject_set_name(&cdev->kobj, name);
+
+ ret = cdev_add(cdev, dev, 1);
+ if (ret < 0) {
+ pr_err("Could not add cdev for minor %d, %s (err %d)\n",
+ minor, name, -ret);
+ goto done;
+ }
+
+ device = device_create(class, NULL, dev, NULL, "%s", name);
+ if (!IS_ERR(device))
+ goto done;
+ ret = PTR_ERR(device);
+ device = NULL;
+ pr_err("Could not create device for minor %d, %s (err %d)\n",
+ minor, name, -ret);
+ cdev_del(cdev);
+done:
+ *devp = device;
+ return ret;
+}
+
+void hfi1_cdev_cleanup(struct cdev *cdev, struct device **devp)
+{
+ struct device *device = *devp;
+
+ if (device) {
+ device_unregister(device);
+ *devp = NULL;
+
+ cdev_del(cdev);
+ }
+}
+
+static const char *hfi1_class_name = "hfi1";
+
+const char *class_name(void)
+{
+ return hfi1_class_name;
+}
+
+int __init dev_init(void)
+{
+ int ret;
+
+ ret = alloc_chrdev_region(&hfi1_dev, 0, HFI1_NMINORS, DRIVER_NAME);
+ if (ret < 0) {
+ pr_err("Could not allocate chrdev region (err %d)\n", -ret);
+ goto done;
+ }
+
+ class = class_create(THIS_MODULE, class_name());
+ if (IS_ERR(class)) {
+ ret = PTR_ERR(class);
+ pr_err("Could not create device class (err %d)\n", -ret);
+ unregister_chrdev_region(hfi1_dev, HFI1_NMINORS);
+ }
+
+done:
+ return ret;
+}
+
+void dev_cleanup(void)
+{
+ if (class) {
+ class_destroy(class);
+ class = NULL;
+ }
+
+ unregister_chrdev_region(hfi1_dev, HFI1_NMINORS);
+}
diff --git a/drivers/staging/rdma/hfi1/device.h b/drivers/staging/rdma/hfi1/device.h
new file mode 100644
index 0000000..98caecd
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/device.h
@@ -0,0 +1,61 @@
+#ifndef _HFI1_DEVICE_H
+#define _HFI1_DEVICE_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+int hfi1_cdev_init(int minor, const char *name,
+ const struct file_operations *fops,
+ struct cdev *cdev, struct device **devp);
+void hfi1_cdev_cleanup(struct cdev *cdev, struct device **devp);
+const char *class_name(void);
+int __init dev_init(void);
+void dev_cleanup(void);
+
+#endif /* _HFI1_DEVICE_H */
diff --git a/drivers/staging/rdma/hfi1/diag.c b/drivers/staging/rdma/hfi1/diag.c
new file mode 100644
index 0000000..6777d6b
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/diag.c
@@ -0,0 +1,1873 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * This file contains support for diagnostic functions. It is accessed by
+ * opening the hfi1_diag device, normally minor number 129. Diagnostic use
+ * of the chip may render the chip or board unusable until the driver
+ * is unloaded, or in some cases, until the system is rebooted.
+ *
+ * Accesses to the chip through this interface are not similar to going
+ * through the /sys/bus/pci resource mmap interface.
+ */
+
+#include <linux/io.h>
+#include <linux/pci.h>
+#include <linux/poll.h>
+#include <linux/vmalloc.h>
+#include <linux/export.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+#include <rdma/ib_smi.h>
+#include "hfi.h"
+#include "device.h"
+#include "common.h"
+#include "trace.h"
+
+#undef pr_fmt
+#define pr_fmt(fmt) DRIVER_NAME ": " fmt
+#define snoop_dbg(fmt, ...) \
+ hfi1_cdbg(SNOOP, fmt, ##__VA_ARGS__)
+
+/* Snoop option mask */
+#define SNOOP_DROP_SEND (1 << 0)
+#define SNOOP_USE_METADATA (1 << 1)
+
+static u8 snoop_flags;
+
+/*
+ * Extract packet length from LRH header.
+ * Why & 0x7FF? Because len is only 11 bits in case it wasn't 0'd we throw the
+ * bogus bits away. This is in Dwords so multiply by 4 to get size in bytes
+ */
+#define HFI1_GET_PKT_LEN(x) (((be16_to_cpu((x)->lrh[2]) & 0x7FF)) << 2)
+
+enum hfi1_filter_status {
+ HFI1_FILTER_HIT,
+ HFI1_FILTER_ERR,
+ HFI1_FILTER_MISS
+};
+
+/* snoop processing functions */
+rhf_rcv_function_ptr snoop_rhf_rcv_functions[8] = {
+ [RHF_RCV_TYPE_EXPECTED] = snoop_recv_handler,
+ [RHF_RCV_TYPE_EAGER] = snoop_recv_handler,
+ [RHF_RCV_TYPE_IB] = snoop_recv_handler,
+ [RHF_RCV_TYPE_ERROR] = snoop_recv_handler,
+ [RHF_RCV_TYPE_BYPASS] = snoop_recv_handler,
+ [RHF_RCV_TYPE_INVALID5] = process_receive_invalid,
+ [RHF_RCV_TYPE_INVALID6] = process_receive_invalid,
+ [RHF_RCV_TYPE_INVALID7] = process_receive_invalid
+};
+
+/* Snoop packet structure */
+struct snoop_packet {
+ struct list_head list;
+ u32 total_len;
+ u8 data[];
+};
+
+/* Do not make these an enum or it will blow up the capture_md */
+#define PKT_DIR_EGRESS 0x0
+#define PKT_DIR_INGRESS 0x1
+
+/* Packet capture metadata returned to the user with the packet. */
+struct capture_md {
+ u8 port;
+ u8 dir;
+ u8 reserved[6];
+ union {
+ u64 pbc;
+ u64 rhf;
+ } u;
+};
+
+static atomic_t diagpkt_count = ATOMIC_INIT(0);
+static struct cdev diagpkt_cdev;
+static struct device *diagpkt_device;
+
+static ssize_t diagpkt_write(struct file *fp, const char __user *data,
+ size_t count, loff_t *off);
+
+static const struct file_operations diagpkt_file_ops = {
+ .owner = THIS_MODULE,
+ .write = diagpkt_write,
+ .llseek = noop_llseek,
+};
+
+/*
+ * This is used for communication with user space for snoop extended IOCTLs
+ */
+struct hfi1_link_info {
+ __be64 node_guid;
+ u8 port_mode;
+ u8 port_state;
+ u16 link_speed_active;
+ u16 link_width_active;
+ u16 vl15_init;
+ u8 port_number;
+ /*
+ * Add padding to make this a full IB SMP payload. Note: changing the
+ * size of this structure will make the IOCTLs created with _IOWR
+ * change.
+ * Be sure to run tests on all IOCTLs when making changes to this
+ * structure.
+ */
+ u8 res[47];
+};
+
+/*
+ * This starts our ioctl sequence numbers *way* off from the ones
+ * defined in ib_core.
+ */
+#define SNOOP_CAPTURE_VERSION 0x1
+
+#define IB_IOCTL_MAGIC 0x1b /* See Documentation/ioctl-number.txt */
+#define HFI1_SNOOP_IOC_MAGIC IB_IOCTL_MAGIC
+#define HFI1_SNOOP_IOC_BASE_SEQ 0x80
+
+#define HFI1_SNOOP_IOCGETLINKSTATE \
+ _IO(HFI1_SNOOP_IOC_MAGIC, HFI1_SNOOP_IOC_BASE_SEQ)
+#define HFI1_SNOOP_IOCSETLINKSTATE \
+ _IO(HFI1_SNOOP_IOC_MAGIC, HFI1_SNOOP_IOC_BASE_SEQ+1)
+#define HFI1_SNOOP_IOCCLEARQUEUE \
+ _IO(HFI1_SNOOP_IOC_MAGIC, HFI1_SNOOP_IOC_BASE_SEQ+2)
+#define HFI1_SNOOP_IOCCLEARFILTER \
+ _IO(HFI1_SNOOP_IOC_MAGIC, HFI1_SNOOP_IOC_BASE_SEQ+3)
+#define HFI1_SNOOP_IOCSETFILTER \
+ _IO(HFI1_SNOOP_IOC_MAGIC, HFI1_SNOOP_IOC_BASE_SEQ+4)
+#define HFI1_SNOOP_IOCGETVERSION \
+ _IO(HFI1_SNOOP_IOC_MAGIC, HFI1_SNOOP_IOC_BASE_SEQ+5)
+#define HFI1_SNOOP_IOCSET_OPTS \
+ _IO(HFI1_SNOOP_IOC_MAGIC, HFI1_SNOOP_IOC_BASE_SEQ+6)
+
+/*
+ * These offsets +6/+7 could change, but these are already known and used
+ * IOCTL numbers so don't change them without a good reason.
+ */
+#define HFI1_SNOOP_IOCGETLINKSTATE_EXTRA \
+ _IOWR(HFI1_SNOOP_IOC_MAGIC, HFI1_SNOOP_IOC_BASE_SEQ+6, \
+ struct hfi1_link_info)
+#define HFI1_SNOOP_IOCSETLINKSTATE_EXTRA \
+ _IOWR(HFI1_SNOOP_IOC_MAGIC, HFI1_SNOOP_IOC_BASE_SEQ+7, \
+ struct hfi1_link_info)
+
+static int hfi1_snoop_open(struct inode *in, struct file *fp);
+static ssize_t hfi1_snoop_read(struct file *fp, char __user *data,
+ size_t pkt_len, loff_t *off);
+static ssize_t hfi1_snoop_write(struct file *fp, const char __user *data,
+ size_t count, loff_t *off);
+static long hfi1_ioctl(struct file *fp, unsigned int cmd, unsigned long arg);
+static unsigned int hfi1_snoop_poll(struct file *fp,
+ struct poll_table_struct *wait);
+static int hfi1_snoop_release(struct inode *in, struct file *fp);
+
+struct hfi1_packet_filter_command {
+ int opcode;
+ int length;
+ void *value_ptr;
+};
+
+/* Can't re-use PKT_DIR_*GRESS here because 0 means no packets for this */
+#define HFI1_SNOOP_INGRESS 0x1
+#define HFI1_SNOOP_EGRESS 0x2
+
+enum hfi1_packet_filter_opcodes {
+ FILTER_BY_LID,
+ FILTER_BY_DLID,
+ FILTER_BY_MAD_MGMT_CLASS,
+ FILTER_BY_QP_NUMBER,
+ FILTER_BY_PKT_TYPE,
+ FILTER_BY_SERVICE_LEVEL,
+ FILTER_BY_PKEY,
+ FILTER_BY_DIRECTION,
+};
+
+static const struct file_operations snoop_file_ops = {
+ .owner = THIS_MODULE,
+ .open = hfi1_snoop_open,
+ .read = hfi1_snoop_read,
+ .unlocked_ioctl = hfi1_ioctl,
+ .poll = hfi1_snoop_poll,
+ .write = hfi1_snoop_write,
+ .release = hfi1_snoop_release
+};
+
+struct hfi1_filter_array {
+ int (*filter)(void *, void *, void *);
+};
+
+static int hfi1_filter_lid(void *ibhdr, void *packet_data, void *value);
+static int hfi1_filter_dlid(void *ibhdr, void *packet_data, void *value);
+static int hfi1_filter_mad_mgmt_class(void *ibhdr, void *packet_data,
+ void *value);
+static int hfi1_filter_qp_number(void *ibhdr, void *packet_data, void *value);
+static int hfi1_filter_ibpacket_type(void *ibhdr, void *packet_data,
+ void *value);
+static int hfi1_filter_ib_service_level(void *ibhdr, void *packet_data,
+ void *value);
+static int hfi1_filter_ib_pkey(void *ibhdr, void *packet_data, void *value);
+static int hfi1_filter_direction(void *ibhdr, void *packet_data, void *value);
+
+static struct hfi1_filter_array hfi1_filters[] = {
+ { hfi1_filter_lid },
+ { hfi1_filter_dlid },
+ { hfi1_filter_mad_mgmt_class },
+ { hfi1_filter_qp_number },
+ { hfi1_filter_ibpacket_type },
+ { hfi1_filter_ib_service_level },
+ { hfi1_filter_ib_pkey },
+ { hfi1_filter_direction },
+};
+
+#define HFI1_MAX_FILTERS ARRAY_SIZE(hfi1_filters)
+#define HFI1_DIAG_MINOR_BASE 129
+
+static int hfi1_snoop_add(struct hfi1_devdata *dd, const char *name);
+
+int hfi1_diag_add(struct hfi1_devdata *dd)
+{
+ char name[16];
+ int ret = 0;
+
+ snprintf(name, sizeof(name), "%s_diagpkt%d", class_name(),
+ dd->unit);
+ /*
+ * Do this for each device as opposed to the normal diagpkt
+ * interface which is one per host
+ */
+ ret = hfi1_snoop_add(dd, name);
+ if (ret)
+ dd_dev_err(dd, "Unable to init snoop/capture device");
+
+ snprintf(name, sizeof(name), "%s_diagpkt", class_name());
+ if (atomic_inc_return(&diagpkt_count) == 1) {
+ ret = hfi1_cdev_init(HFI1_DIAGPKT_MINOR, name,
+ &diagpkt_file_ops, &diagpkt_cdev,
+ &diagpkt_device);
+ }
+
+ return ret;
+}
+
+/* this must be called w/ dd->snoop_in_lock held */
+static void drain_snoop_list(struct list_head *queue)
+{
+ struct list_head *pos, *q;
+ struct snoop_packet *packet;
+
+ list_for_each_safe(pos, q, queue) {
+ packet = list_entry(pos, struct snoop_packet, list);
+ list_del(pos);
+ kfree(packet);
+ }
+}
+
+static void hfi1_snoop_remove(struct hfi1_devdata *dd)
+{
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&dd->hfi1_snoop.snoop_lock, flags);
+ drain_snoop_list(&dd->hfi1_snoop.queue);
+ hfi1_cdev_cleanup(&dd->hfi1_snoop.cdev, &dd->hfi1_snoop.class_dev);
+ spin_unlock_irqrestore(&dd->hfi1_snoop.snoop_lock, flags);
+}
+
+void hfi1_diag_remove(struct hfi1_devdata *dd)
+{
+
+ hfi1_snoop_remove(dd);
+ if (atomic_dec_and_test(&diagpkt_count))
+ hfi1_cdev_cleanup(&diagpkt_cdev, &diagpkt_device);
+ hfi1_cdev_cleanup(&dd->diag_cdev, &dd->diag_device);
+}
+
+
+/*
+ * Allocated structure shared between the credit return mechanism and
+ * diagpkt_send().
+ */
+struct diagpkt_wait {
+ struct completion credits_returned;
+ int code;
+ atomic_t count;
+};
+
+/*
+ * When each side is finished with the structure, they call this.
+ * The last user frees the structure.
+ */
+static void put_diagpkt_wait(struct diagpkt_wait *wait)
+{
+ if (atomic_dec_and_test(&wait->count))
+ kfree(wait);
+}
+
+/*
+ * Callback from the credit return code. Set the complete, which
+ * will let diapkt_send() continue.
+ */
+static void diagpkt_complete(void *arg, int code)
+{
+ struct diagpkt_wait *wait = (struct diagpkt_wait *)arg;
+
+ wait->code = code;
+ complete(&wait->credits_returned);
+ put_diagpkt_wait(wait); /* finished with the structure */
+}
+
+/**
+ * diagpkt_send - send a packet
+ * @dp: diag packet descriptor
+ */
+static ssize_t diagpkt_send(struct diag_pkt *dp)
+{
+ struct hfi1_devdata *dd;
+ struct send_context *sc;
+ struct pio_buf *pbuf;
+ u32 *tmpbuf = NULL;
+ ssize_t ret = 0;
+ u32 pkt_len, total_len;
+ pio_release_cb credit_cb = NULL;
+ void *credit_arg = NULL;
+ struct diagpkt_wait *wait = NULL;
+
+ dd = hfi1_lookup(dp->unit);
+ if (!dd || !(dd->flags & HFI1_PRESENT) || !dd->kregbase) {
+ ret = -ENODEV;
+ goto bail;
+ }
+ if (!(dd->flags & HFI1_INITTED)) {
+ /* no hardware, freeze, etc. */
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ if (dp->version != _DIAG_PKT_VERS) {
+ dd_dev_err(dd, "Invalid version %u for diagpkt_write\n",
+ dp->version);
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ /* send count must be an exact number of dwords */
+ if (dp->len & 3) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ /* there is only port 1 */
+ if (dp->port != 1) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ /* need a valid context */
+ if (dp->sw_index >= dd->num_send_contexts) {
+ ret = -EINVAL;
+ goto bail;
+ }
+ /* can only use kernel contexts */
+ if (dd->send_contexts[dp->sw_index].type != SC_KERNEL) {
+ ret = -EINVAL;
+ goto bail;
+ }
+ /* must be allocated */
+ sc = dd->send_contexts[dp->sw_index].sc;
+ if (!sc) {
+ ret = -EINVAL;
+ goto bail;
+ }
+ /* must be enabled */
+ if (!(sc->flags & SCF_ENABLED)) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ /* allocate a buffer and copy the data in */
+ tmpbuf = vmalloc(dp->len);
+ if (!tmpbuf) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ if (copy_from_user(tmpbuf,
+ (const void __user *) (unsigned long) dp->data,
+ dp->len)) {
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ /*
+ * pkt_len is how much data we have to write, includes header and data.
+ * total_len is length of the packet in Dwords plus the PBC should not
+ * include the CRC.
+ */
+ pkt_len = dp->len >> 2;
+ total_len = pkt_len + 2; /* PBC + packet */
+
+ /* if 0, fill in a default */
+ if (dp->pbc == 0) {
+ struct hfi1_pportdata *ppd = dd->pport;
+
+ hfi1_cdbg(PKT, "Generating PBC");
+ dp->pbc = create_pbc(ppd, 0, 0, 0, total_len);
+ } else {
+ hfi1_cdbg(PKT, "Using passed in PBC");
+ }
+
+ hfi1_cdbg(PKT, "Egress PBC content is 0x%llx", dp->pbc);
+
+ /*
+ * The caller wants to wait until the packet is sent and to
+ * check for errors. The best we can do is wait until
+ * the buffer credits are returned and check if any packet
+ * error has occurred. If there are any late errors, this
+ * could miss it. If there are other senders who generate
+ * an error, this may find it. However, in general, it
+ * should catch most.
+ */
+ if (dp->flags & F_DIAGPKT_WAIT) {
+ /* always force a credit return */
+ dp->pbc |= PBC_CREDIT_RETURN;
+ /* turn on credit return interrupts */
+ sc_add_credit_return_intr(sc);
+ wait = kmalloc(sizeof(*wait), GFP_KERNEL);
+ if (!wait) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+ init_completion(&wait->credits_returned);
+ atomic_set(&wait->count, 2);
+ wait->code = PRC_OK;
+
+ credit_cb = diagpkt_complete;
+ credit_arg = wait;
+ }
+
+ pbuf = sc_buffer_alloc(sc, total_len, credit_cb, credit_arg);
+ if (!pbuf) {
+ /*
+ * No send buffer means no credit callback. Undo
+ * the wait set-up that was done above. We free wait
+ * because the callback will never be called.
+ */
+ if (dp->flags & F_DIAGPKT_WAIT) {
+ sc_del_credit_return_intr(sc);
+ kfree(wait);
+ wait = NULL;
+ }
+ ret = -ENOSPC;
+ goto bail;
+ }
+
+ pio_copy(dd, pbuf, dp->pbc, tmpbuf, pkt_len);
+ /* no flush needed as the HW knows the packet size */
+
+ ret = sizeof(*dp);
+
+ if (dp->flags & F_DIAGPKT_WAIT) {
+ /* wait for credit return */
+ ret = wait_for_completion_interruptible(
+ &wait->credits_returned);
+ /*
+ * If the wait returns an error, the wait was interrupted,
+ * e.g. with a ^C in the user program. The callback is
+ * still pending. This is OK as the wait structure is
+ * kmalloc'ed and the structure will free itself when
+ * all users are done with it.
+ *
+ * A context disable occurs on a send context restart, so
+ * include that in the list of errors below to check for.
+ * NOTE: PRC_FILL_ERR is at best informational and cannot
+ * be depended on.
+ */
+ if (!ret && (((wait->code & PRC_STATUS_ERR)
+ || (wait->code & PRC_FILL_ERR)
+ || (wait->code & PRC_SC_DISABLE))))
+ ret = -EIO;
+
+ put_diagpkt_wait(wait); /* finished with the structure */
+ sc_del_credit_return_intr(sc);
+ }
+
+bail:
+ vfree(tmpbuf);
+ return ret;
+}
+
+static ssize_t diagpkt_write(struct file *fp, const char __user *data,
+ size_t count, loff_t *off)
+{
+ struct hfi1_devdata *dd;
+ struct send_context *sc;
+ u8 vl;
+
+ struct diag_pkt dp;
+
+ if (count != sizeof(dp))
+ return -EINVAL;
+
+ if (copy_from_user(&dp, data, sizeof(dp)))
+ return -EFAULT;
+
+ /*
+ * The Send Context is derived from the PbcVL value
+ * if PBC is populated
+ */
+ if (dp.pbc) {
+ dd = hfi1_lookup(dp.unit);
+ if (dd == NULL)
+ return -ENODEV;
+ vl = (dp.pbc >> PBC_VL_SHIFT) & PBC_VL_MASK;
+ sc = dd->vld[vl].sc;
+ if (sc) {
+ dp.sw_index = sc->sw_index;
+ hfi1_cdbg(
+ PKT,
+ "Packet sent over VL %d via Send Context %u(%u)",
+ vl, sc->sw_index, sc->hw_context);
+ }
+ }
+
+ return diagpkt_send(&dp);
+}
+
+static int hfi1_snoop_add(struct hfi1_devdata *dd, const char *name)
+{
+ int ret = 0;
+
+ dd->hfi1_snoop.mode_flag = 0;
+ spin_lock_init(&dd->hfi1_snoop.snoop_lock);
+ INIT_LIST_HEAD(&dd->hfi1_snoop.queue);
+ init_waitqueue_head(&dd->hfi1_snoop.waitq);
+
+ ret = hfi1_cdev_init(HFI1_SNOOP_CAPTURE_BASE + dd->unit, name,
+ &snoop_file_ops,
+ &dd->hfi1_snoop.cdev, &dd->hfi1_snoop.class_dev);
+
+ if (ret) {
+ dd_dev_err(dd, "Couldn't create %s device: %d", name, ret);
+ hfi1_cdev_cleanup(&dd->hfi1_snoop.cdev,
+ &dd->hfi1_snoop.class_dev);
+ }
+
+ return ret;
+}
+
+static struct hfi1_devdata *hfi1_dd_from_sc_inode(struct inode *in)
+{
+ int unit = iminor(in) - HFI1_SNOOP_CAPTURE_BASE;
+ struct hfi1_devdata *dd = NULL;
+
+ dd = hfi1_lookup(unit);
+ return dd;
+
+}
+
+/* clear or restore send context integrity checks */
+static void adjust_integrity_checks(struct hfi1_devdata *dd)
+{
+ struct send_context *sc;
+ unsigned long sc_flags;
+ int i;
+
+ spin_lock_irqsave(&dd->sc_lock, sc_flags);
+ for (i = 0; i < dd->num_send_contexts; i++) {
+ int enable;
+
+ sc = dd->send_contexts[i].sc;
+
+ if (!sc)
+ continue; /* not allocated */
+
+ enable = likely(!HFI1_CAP_IS_KSET(NO_INTEGRITY)) &&
+ dd->hfi1_snoop.mode_flag != HFI1_PORT_SNOOP_MODE;
+
+ set_pio_integrity(sc);
+
+ if (enable) /* take HFI_CAP_* flags into account */
+ hfi1_init_ctxt(sc);
+ }
+ spin_unlock_irqrestore(&dd->sc_lock, sc_flags);
+}
+
+static int hfi1_snoop_open(struct inode *in, struct file *fp)
+{
+ int ret;
+ int mode_flag = 0;
+ unsigned long flags = 0;
+ struct hfi1_devdata *dd;
+ struct list_head *queue;
+
+ mutex_lock(&hfi1_mutex);
+
+ dd = hfi1_dd_from_sc_inode(in);
+ if (dd == NULL) {
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ /*
+ * File mode determines snoop or capture. Some existing user
+ * applications expect the capture device to be able to be opened RDWR
+ * because they expect a dedicated capture device. For this reason we
+ * support a module param to force capture mode even if the file open
+ * mode matches snoop.
+ */
+ if ((fp->f_flags & O_ACCMODE) == O_RDONLY) {
+ snoop_dbg("Capture Enabled");
+ mode_flag = HFI1_PORT_CAPTURE_MODE;
+ } else if ((fp->f_flags & O_ACCMODE) == O_RDWR) {
+ snoop_dbg("Snoop Enabled");
+ mode_flag = HFI1_PORT_SNOOP_MODE;
+ } else {
+ snoop_dbg("Invalid");
+ ret = -EINVAL;
+ goto bail;
+ }
+ queue = &dd->hfi1_snoop.queue;
+
+ /*
+ * We are not supporting snoop and capture at the same time.
+ */
+ spin_lock_irqsave(&dd->hfi1_snoop.snoop_lock, flags);
+ if (dd->hfi1_snoop.mode_flag) {
+ ret = -EBUSY;
+ spin_unlock_irqrestore(&dd->hfi1_snoop.snoop_lock, flags);
+ goto bail;
+ }
+
+ dd->hfi1_snoop.mode_flag = mode_flag;
+ drain_snoop_list(queue);
+
+ dd->hfi1_snoop.filter_callback = NULL;
+ dd->hfi1_snoop.filter_value = NULL;
+
+ /*
+ * Send side packet integrity checks are not helpful when snooping so
+ * disable and re-enable when we stop snooping.
+ */
+ if (mode_flag == HFI1_PORT_SNOOP_MODE) {
+ /* clear after snoop mode is on */
+ adjust_integrity_checks(dd); /* clear */
+
+ /*
+ * We also do not want to be doing the DLID LMC check for
+ * ingressed packets.
+ */
+ dd->hfi1_snoop.dcc_cfg = read_csr(dd, DCC_CFG_PORT_CONFIG1);
+ write_csr(dd, DCC_CFG_PORT_CONFIG1,
+ (dd->hfi1_snoop.dcc_cfg >> 32) << 32);
+ }
+
+ /*
+ * As soon as we set these function pointers the recv and send handlers
+ * are active. This is a race condition so we must make sure to drain
+ * the queue and init filter values above. Technically we should add
+ * locking here but all that will happen is on recv a packet will get
+ * allocated and get stuck on the snoop_lock before getting added to the
+ * queue. Same goes for send.
+ */
+ dd->rhf_rcv_function_map = snoop_rhf_rcv_functions;
+ dd->process_pio_send = snoop_send_pio_handler;
+ dd->process_dma_send = snoop_send_pio_handler;
+ dd->pio_inline_send = snoop_inline_pio_send;
+
+ spin_unlock_irqrestore(&dd->hfi1_snoop.snoop_lock, flags);
+ ret = 0;
+
+bail:
+ mutex_unlock(&hfi1_mutex);
+
+ return ret;
+}
+
+static int hfi1_snoop_release(struct inode *in, struct file *fp)
+{
+ unsigned long flags = 0;
+ struct hfi1_devdata *dd;
+ int mode_flag;
+
+ dd = hfi1_dd_from_sc_inode(in);
+ if (dd == NULL)
+ return -ENODEV;
+
+ spin_lock_irqsave(&dd->hfi1_snoop.snoop_lock, flags);
+
+ /* clear the snoop mode before re-adjusting send context CSRs */
+ mode_flag = dd->hfi1_snoop.mode_flag;
+ dd->hfi1_snoop.mode_flag = 0;
+
+ /*
+ * Drain the queue and clear the filters we are done with it. Don't
+ * forget to restore the packet integrity checks
+ */
+ drain_snoop_list(&dd->hfi1_snoop.queue);
+ if (mode_flag == HFI1_PORT_SNOOP_MODE) {
+ /* restore after snoop mode is clear */
+ adjust_integrity_checks(dd); /* restore */
+
+ /*
+ * Also should probably reset the DCC_CONFIG1 register for DLID
+ * checking on incoming packets again. Use the value saved when
+ * opening the snoop device.
+ */
+ write_csr(dd, DCC_CFG_PORT_CONFIG1, dd->hfi1_snoop.dcc_cfg);
+ }
+
+ dd->hfi1_snoop.filter_callback = NULL;
+ kfree(dd->hfi1_snoop.filter_value);
+ dd->hfi1_snoop.filter_value = NULL;
+
+ /*
+ * User is done snooping and capturing, return control to the normal
+ * handler. Re-enable SDMA handling.
+ */
+ dd->rhf_rcv_function_map = dd->normal_rhf_rcv_functions;
+ dd->process_pio_send = hfi1_verbs_send_pio;
+ dd->process_dma_send = hfi1_verbs_send_dma;
+ dd->pio_inline_send = pio_copy;
+
+ spin_unlock_irqrestore(&dd->hfi1_snoop.snoop_lock, flags);
+
+ snoop_dbg("snoop/capture device released");
+
+ return 0;
+}
+
+static unsigned int hfi1_snoop_poll(struct file *fp,
+ struct poll_table_struct *wait)
+{
+ int ret = 0;
+ unsigned long flags = 0;
+
+ struct hfi1_devdata *dd;
+
+ dd = hfi1_dd_from_sc_inode(fp->f_inode);
+ if (dd == NULL)
+ return -ENODEV;
+
+ spin_lock_irqsave(&dd->hfi1_snoop.snoop_lock, flags);
+
+ poll_wait(fp, &dd->hfi1_snoop.waitq, wait);
+ if (!list_empty(&dd->hfi1_snoop.queue))
+ ret |= POLLIN | POLLRDNORM;
+
+ spin_unlock_irqrestore(&dd->hfi1_snoop.snoop_lock, flags);
+ return ret;
+
+}
+
+static ssize_t hfi1_snoop_write(struct file *fp, const char __user *data,
+ size_t count, loff_t *off)
+{
+ struct diag_pkt dpkt;
+ struct hfi1_devdata *dd;
+ size_t ret;
+ u8 byte_two, sl, sc5, sc4, vl, byte_one;
+ struct send_context *sc;
+ u32 len;
+ u64 pbc;
+ struct hfi1_ibport *ibp;
+ struct hfi1_pportdata *ppd;
+
+ dd = hfi1_dd_from_sc_inode(fp->f_inode);
+ if (dd == NULL)
+ return -ENODEV;
+
+ ppd = dd->pport;
+ snoop_dbg("received %lu bytes from user", count);
+
+ memset(&dpkt, 0, sizeof(struct diag_pkt));
+ dpkt.version = _DIAG_PKT_VERS;
+ dpkt.unit = dd->unit;
+ dpkt.port = 1;
+
+ if (likely(!(snoop_flags & SNOOP_USE_METADATA))) {
+ /*
+ * We need to generate the PBC and not let diagpkt_send do it,
+ * to do this we need the VL and the length in dwords.
+ * The VL can be determined by using the SL and looking up the
+ * SC. Then the SC can be converted into VL. The exception to
+ * this is those packets which are from an SMI queue pair.
+ * Since we can't detect anything about the QP here we have to
+ * rely on the SC. If its 0xF then we assume its SMI and
+ * do not look at the SL.
+ */
+ if (copy_from_user(&byte_one, data, 1))
+ return -EINVAL;
+
+ if (copy_from_user(&byte_two, data+1, 1))
+ return -EINVAL;
+
+ sc4 = (byte_one >> 4) & 0xf;
+ if (sc4 == 0xF) {
+ snoop_dbg("Detected VL15 packet ignoring SL in packet");
+ vl = sc4;
+ } else {
+ sl = (byte_two >> 4) & 0xf;
+ ibp = to_iport(&dd->verbs_dev.ibdev, 1);
+ sc5 = ibp->sl_to_sc[sl];
+ vl = sc_to_vlt(dd, sc5);
+ if (vl != sc4) {
+ snoop_dbg("VL %d does not match SC %d of packet",
+ vl, sc4);
+ return -EINVAL;
+ }
+ }
+
+ sc = dd->vld[vl].sc; /* Look up the context based on VL */
+ if (sc) {
+ dpkt.sw_index = sc->sw_index;
+ snoop_dbg("Sending on context %u(%u)", sc->sw_index,
+ sc->hw_context);
+ } else {
+ snoop_dbg("Could not find context for vl %d", vl);
+ return -EINVAL;
+ }
+
+ len = (count >> 2) + 2; /* Add in PBC */
+ pbc = create_pbc(ppd, 0, 0, vl, len);
+ } else {
+ if (copy_from_user(&pbc, data, sizeof(pbc)))
+ return -EINVAL;
+ vl = (pbc >> PBC_VL_SHIFT) & PBC_VL_MASK;
+ sc = dd->vld[vl].sc; /* Look up the context based on VL */
+ if (sc) {
+ dpkt.sw_index = sc->sw_index;
+ } else {
+ snoop_dbg("Could not find context for vl %d", vl);
+ return -EINVAL;
+ }
+ data += sizeof(pbc);
+ count -= sizeof(pbc);
+ }
+ dpkt.len = count;
+ dpkt.data = (unsigned long)data;
+
+ snoop_dbg("PBC: vl=0x%llx Length=0x%llx",
+ (pbc >> 12) & 0xf,
+ (pbc & 0xfff));
+
+ dpkt.pbc = pbc;
+ ret = diagpkt_send(&dpkt);
+ /*
+ * diagpkt_send only returns number of bytes in the diagpkt so patch
+ * that up here before returning.
+ */
+ if (ret == sizeof(dpkt))
+ return count;
+
+ return ret;
+}
+
+static ssize_t hfi1_snoop_read(struct file *fp, char __user *data,
+ size_t pkt_len, loff_t *off)
+{
+ ssize_t ret = 0;
+ unsigned long flags = 0;
+ struct snoop_packet *packet = NULL;
+ struct hfi1_devdata *dd;
+
+ dd = hfi1_dd_from_sc_inode(fp->f_inode);
+ if (dd == NULL)
+ return -ENODEV;
+
+ spin_lock_irqsave(&dd->hfi1_snoop.snoop_lock, flags);
+
+ while (list_empty(&dd->hfi1_snoop.queue)) {
+ spin_unlock_irqrestore(&dd->hfi1_snoop.snoop_lock, flags);
+
+ if (fp->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+
+ if (wait_event_interruptible(
+ dd->hfi1_snoop.waitq,
+ !list_empty(&dd->hfi1_snoop.queue)))
+ return -EINTR;
+
+ spin_lock_irqsave(&dd->hfi1_snoop.snoop_lock, flags);
+ }
+
+ if (!list_empty(&dd->hfi1_snoop.queue)) {
+ packet = list_entry(dd->hfi1_snoop.queue.next,
+ struct snoop_packet, list);
+ list_del(&packet->list);
+ spin_unlock_irqrestore(&dd->hfi1_snoop.snoop_lock, flags);
+ if (pkt_len >= packet->total_len) {
+ if (copy_to_user(data, packet->data,
+ packet->total_len))
+ ret = -EFAULT;
+ else
+ ret = packet->total_len;
+ } else
+ ret = -EINVAL;
+
+ kfree(packet);
+ } else
+ spin_unlock_irqrestore(&dd->hfi1_snoop.snoop_lock, flags);
+
+ return ret;
+}
+
+static long hfi1_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
+{
+ struct hfi1_devdata *dd;
+ void *filter_value = NULL;
+ long ret = 0;
+ int value = 0;
+ u8 physState = 0;
+ u8 linkState = 0;
+ u16 devState = 0;
+ unsigned long flags = 0;
+ unsigned long *argp = NULL;
+ struct hfi1_packet_filter_command filter_cmd = {0};
+ int mode_flag = 0;
+ struct hfi1_pportdata *ppd = NULL;
+ unsigned int index;
+ struct hfi1_link_info link_info;
+
+ dd = hfi1_dd_from_sc_inode(fp->f_inode);
+ if (dd == NULL)
+ return -ENODEV;
+
+ spin_lock_irqsave(&dd->hfi1_snoop.snoop_lock, flags);
+
+ mode_flag = dd->hfi1_snoop.mode_flag;
+
+ if (((_IOC_DIR(cmd) & _IOC_READ)
+ && !access_ok(VERIFY_WRITE, (void __user *)arg, _IOC_SIZE(cmd)))
+ || ((_IOC_DIR(cmd) & _IOC_WRITE)
+ && !access_ok(VERIFY_READ, (void __user *)arg, _IOC_SIZE(cmd)))) {
+ ret = -EFAULT;
+ } else if (!capable(CAP_SYS_ADMIN)) {
+ ret = -EPERM;
+ } else if ((mode_flag & HFI1_PORT_CAPTURE_MODE) &&
+ (cmd != HFI1_SNOOP_IOCCLEARQUEUE) &&
+ (cmd != HFI1_SNOOP_IOCCLEARFILTER) &&
+ (cmd != HFI1_SNOOP_IOCSETFILTER)) {
+ /* Capture devices are allowed only 3 operations
+ * 1.Clear capture queue
+ * 2.Clear capture filter
+ * 3.Set capture filter
+ * Other are invalid.
+ */
+ ret = -EINVAL;
+ } else {
+ switch (cmd) {
+ case HFI1_SNOOP_IOCSETLINKSTATE:
+ snoop_dbg("HFI1_SNOOP_IOCSETLINKSTATE is not valid");
+ ret = -EINVAL;
+ break;
+
+ case HFI1_SNOOP_IOCSETLINKSTATE_EXTRA:
+ memset(&link_info, 0, sizeof(link_info));
+
+ ret = copy_from_user(&link_info,
+ (struct hfi1_link_info __user *)arg,
+ sizeof(link_info));
+ if (ret)
+ break;
+
+ value = link_info.port_state;
+ index = link_info.port_number;
+ if (index > dd->num_pports - 1) {
+ ret = -EINVAL;
+ break;
+ }
+
+ ppd = &dd->pport[index];
+ if (!ppd) {
+ ret = -EINVAL;
+ break;
+ }
+
+ /* What we want to transition to */
+ physState = (value >> 4) & 0xF;
+ linkState = value & 0xF;
+ snoop_dbg("Setting link state 0x%x", value);
+
+ switch (linkState) {
+ case IB_PORT_NOP:
+ if (physState == 0)
+ break;
+ /* fall through */
+ case IB_PORT_DOWN:
+ switch (physState) {
+ case 0:
+ devState = HLS_DN_DOWNDEF;
+ break;
+ case 2:
+ devState = HLS_DN_POLL;
+ break;
+ case 3:
+ devState = HLS_DN_DISABLE;
+ break;
+ default:
+ ret = -EINVAL;
+ goto done;
+ }
+ ret = set_link_state(ppd, devState);
+ break;
+ case IB_PORT_ARMED:
+ ret = set_link_state(ppd, HLS_UP_ARMED);
+ if (!ret)
+ send_idle_sma(dd, SMA_IDLE_ARM);
+ break;
+ case IB_PORT_ACTIVE:
+ ret = set_link_state(ppd, HLS_UP_ACTIVE);
+ if (!ret)
+ send_idle_sma(dd, SMA_IDLE_ACTIVE);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ if (ret)
+ break;
+ /* fall through */
+ case HFI1_SNOOP_IOCGETLINKSTATE:
+ case HFI1_SNOOP_IOCGETLINKSTATE_EXTRA:
+ if (cmd == HFI1_SNOOP_IOCGETLINKSTATE_EXTRA) {
+ memset(&link_info, 0, sizeof(link_info));
+ ret = copy_from_user(&link_info,
+ (struct hfi1_link_info __user *)arg,
+ sizeof(link_info));
+ index = link_info.port_number;
+ } else {
+ ret = __get_user(index, (int __user *) arg);
+ if (ret != 0)
+ break;
+ }
+
+ if (index > dd->num_pports - 1) {
+ ret = -EINVAL;
+ break;
+ }
+
+ ppd = &dd->pport[index];
+ if (!ppd) {
+ ret = -EINVAL;
+ break;
+ }
+ value = hfi1_ibphys_portstate(ppd);
+ value <<= 4;
+ value |= driver_lstate(ppd);
+
+ snoop_dbg("Link port | Link State: %d", value);
+
+ if ((cmd == HFI1_SNOOP_IOCGETLINKSTATE_EXTRA) ||
+ (cmd == HFI1_SNOOP_IOCSETLINKSTATE_EXTRA)) {
+ link_info.port_state = value;
+ link_info.node_guid = cpu_to_be64(ppd->guid);
+ link_info.link_speed_active =
+ ppd->link_speed_active;
+ link_info.link_width_active =
+ ppd->link_width_active;
+ ret = copy_to_user(
+ (struct hfi1_link_info __user *)arg,
+ &link_info, sizeof(link_info));
+ } else {
+ ret = __put_user(value, (int __user *)arg);
+ }
+ break;
+
+ case HFI1_SNOOP_IOCCLEARQUEUE:
+ snoop_dbg("Clearing snoop queue");
+ drain_snoop_list(&dd->hfi1_snoop.queue);
+ break;
+
+ case HFI1_SNOOP_IOCCLEARFILTER:
+ snoop_dbg("Clearing filter");
+ if (dd->hfi1_snoop.filter_callback) {
+ /* Drain packets first */
+ drain_snoop_list(&dd->hfi1_snoop.queue);
+ dd->hfi1_snoop.filter_callback = NULL;
+ }
+ kfree(dd->hfi1_snoop.filter_value);
+ dd->hfi1_snoop.filter_value = NULL;
+ break;
+
+ case HFI1_SNOOP_IOCSETFILTER:
+ snoop_dbg("Setting filter");
+ /* just copy command structure */
+ argp = (unsigned long *)arg;
+ ret = copy_from_user(&filter_cmd, (void __user *)argp,
+ sizeof(filter_cmd));
+ if (ret < 0) {
+ pr_alert("Error copying filter command\n");
+ break;
+ }
+ if (filter_cmd.opcode >= HFI1_MAX_FILTERS) {
+ pr_alert("Invalid opcode in request\n");
+ ret = -EINVAL;
+ break;
+ }
+
+ snoop_dbg("Opcode %d Len %d Ptr %p",
+ filter_cmd.opcode, filter_cmd.length,
+ filter_cmd.value_ptr);
+
+ filter_value = kzalloc(
+ filter_cmd.length * sizeof(u8),
+ GFP_KERNEL);
+ if (!filter_value) {
+ pr_alert("Not enough memory\n");
+ ret = -ENOMEM;
+ break;
+ }
+ /* copy remaining data from userspace */
+ ret = copy_from_user((u8 *)filter_value,
+ (void __user *)filter_cmd.value_ptr,
+ filter_cmd.length);
+ if (ret < 0) {
+ kfree(filter_value);
+ pr_alert("Error copying filter data\n");
+ break;
+ }
+ /* Drain packets first */
+ drain_snoop_list(&dd->hfi1_snoop.queue);
+ dd->hfi1_snoop.filter_callback =
+ hfi1_filters[filter_cmd.opcode].filter;
+ /* just in case we see back to back sets */
+ kfree(dd->hfi1_snoop.filter_value);
+ dd->hfi1_snoop.filter_value = filter_value;
+
+ break;
+ case HFI1_SNOOP_IOCGETVERSION:
+ value = SNOOP_CAPTURE_VERSION;
+ snoop_dbg("Getting version: %d", value);
+ ret = __put_user(value, (int __user *)arg);
+ break;
+ case HFI1_SNOOP_IOCSET_OPTS:
+ snoop_flags = 0;
+ ret = __get_user(value, (int __user *) arg);
+ if (ret != 0)
+ break;
+
+ snoop_dbg("Setting snoop option %d", value);
+ if (value & SNOOP_DROP_SEND)
+ snoop_flags |= SNOOP_DROP_SEND;
+ if (value & SNOOP_USE_METADATA)
+ snoop_flags |= SNOOP_USE_METADATA;
+ break;
+ default:
+ ret = -ENOTTY;
+ break;
+ }
+ }
+done:
+ spin_unlock_irqrestore(&dd->hfi1_snoop.snoop_lock, flags);
+ return ret;
+}
+
+static void snoop_list_add_tail(struct snoop_packet *packet,
+ struct hfi1_devdata *dd)
+{
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&dd->hfi1_snoop.snoop_lock, flags);
+ if (likely((dd->hfi1_snoop.mode_flag & HFI1_PORT_SNOOP_MODE) ||
+ (dd->hfi1_snoop.mode_flag & HFI1_PORT_CAPTURE_MODE))) {
+ list_add_tail(&packet->list, &dd->hfi1_snoop.queue);
+ snoop_dbg("Added packet to list");
+ }
+
+ /*
+ * Technically we can could have closed the snoop device while waiting
+ * on the above lock and it is gone now. The snoop mode_flag will
+ * prevent us from adding the packet to the queue though.
+ */
+
+ spin_unlock_irqrestore(&dd->hfi1_snoop.snoop_lock, flags);
+ wake_up_interruptible(&dd->hfi1_snoop.waitq);
+}
+
+static inline int hfi1_filter_check(void *val, const char *msg)
+{
+ if (!val) {
+ snoop_dbg("Error invalid %s value for filter", msg);
+ return HFI1_FILTER_ERR;
+ }
+ return 0;
+}
+
+static int hfi1_filter_lid(void *ibhdr, void *packet_data, void *value)
+{
+ struct hfi1_ib_header *hdr;
+ int ret;
+
+ ret = hfi1_filter_check(ibhdr, "header");
+ if (ret)
+ return ret;
+ ret = hfi1_filter_check(value, "user");
+ if (ret)
+ return ret;
+ hdr = (struct hfi1_ib_header *)ibhdr;
+
+ if (*((u16 *)value) == be16_to_cpu(hdr->lrh[3])) /* matches slid */
+ return HFI1_FILTER_HIT; /* matched */
+
+ return HFI1_FILTER_MISS; /* Not matched */
+}
+
+static int hfi1_filter_dlid(void *ibhdr, void *packet_data, void *value)
+{
+ struct hfi1_ib_header *hdr;
+ int ret;
+
+ ret = hfi1_filter_check(ibhdr, "header");
+ if (ret)
+ return ret;
+ ret = hfi1_filter_check(value, "user");
+ if (ret)
+ return ret;
+
+ hdr = (struct hfi1_ib_header *)ibhdr;
+
+ if (*((u16 *)value) == be16_to_cpu(hdr->lrh[1]))
+ return HFI1_FILTER_HIT;
+
+ return HFI1_FILTER_MISS;
+}
+
+/* Not valid for outgoing packets, send handler passes null for data*/
+static int hfi1_filter_mad_mgmt_class(void *ibhdr, void *packet_data,
+ void *value)
+{
+ struct hfi1_ib_header *hdr;
+ struct hfi1_other_headers *ohdr = NULL;
+ struct ib_smp *smp = NULL;
+ u32 qpn = 0;
+ int ret;
+
+ ret = hfi1_filter_check(ibhdr, "header");
+ if (ret)
+ return ret;
+ ret = hfi1_filter_check(packet_data, "packet_data");
+ if (ret)
+ return ret;
+ ret = hfi1_filter_check(value, "user");
+ if (ret)
+ return ret;
+
+ hdr = (struct hfi1_ib_header *)ibhdr;
+
+ /* Check for GRH */
+ if ((be16_to_cpu(hdr->lrh[0]) & 3) == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth; /* LRH + BTH + DETH */
+ else
+ ohdr = &hdr->u.l.oth; /* LRH + GRH + BTH + DETH */
+
+ qpn = be32_to_cpu(ohdr->bth[1]) & 0x00FFFFFF;
+ if (qpn <= 1) {
+ smp = (struct ib_smp *)packet_data;
+ if (*((u8 *)value) == smp->mgmt_class)
+ return HFI1_FILTER_HIT;
+ else
+ return HFI1_FILTER_MISS;
+ }
+ return HFI1_FILTER_ERR;
+}
+
+static int hfi1_filter_qp_number(void *ibhdr, void *packet_data, void *value)
+{
+
+ struct hfi1_ib_header *hdr;
+ struct hfi1_other_headers *ohdr = NULL;
+ int ret;
+
+ ret = hfi1_filter_check(ibhdr, "header");
+ if (ret)
+ return ret;
+ ret = hfi1_filter_check(value, "user");
+ if (ret)
+ return ret;
+
+ hdr = (struct hfi1_ib_header *)ibhdr;
+
+ /* Check for GRH */
+ if ((be16_to_cpu(hdr->lrh[0]) & 3) == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth; /* LRH + BTH + DETH */
+ else
+ ohdr = &hdr->u.l.oth; /* LRH + GRH + BTH + DETH */
+ if (*((u32 *)value) == (be32_to_cpu(ohdr->bth[1]) & 0x00FFFFFF))
+ return HFI1_FILTER_HIT;
+
+ return HFI1_FILTER_MISS;
+}
+
+static int hfi1_filter_ibpacket_type(void *ibhdr, void *packet_data,
+ void *value)
+{
+ u32 lnh = 0;
+ u8 opcode = 0;
+ struct hfi1_ib_header *hdr;
+ struct hfi1_other_headers *ohdr = NULL;
+ int ret;
+
+ ret = hfi1_filter_check(ibhdr, "header");
+ if (ret)
+ return ret;
+ ret = hfi1_filter_check(value, "user");
+ if (ret)
+ return ret;
+
+ hdr = (struct hfi1_ib_header *)ibhdr;
+
+ lnh = (be16_to_cpu(hdr->lrh[0]) & 3);
+
+ if (lnh == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth;
+ else if (lnh == HFI1_LRH_GRH)
+ ohdr = &hdr->u.l.oth;
+ else
+ return HFI1_FILTER_ERR;
+
+ opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+
+ if (*((u8 *)value) == ((opcode >> 5) & 0x7))
+ return HFI1_FILTER_HIT;
+
+ return HFI1_FILTER_MISS;
+}
+
+static int hfi1_filter_ib_service_level(void *ibhdr, void *packet_data,
+ void *value)
+{
+ struct hfi1_ib_header *hdr;
+ int ret;
+
+ ret = hfi1_filter_check(ibhdr, "header");
+ if (ret)
+ return ret;
+ ret = hfi1_filter_check(value, "user");
+ if (ret)
+ return ret;
+
+ hdr = (struct hfi1_ib_header *)ibhdr;
+
+ if ((*((u8 *)value)) == ((be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF))
+ return HFI1_FILTER_HIT;
+
+ return HFI1_FILTER_MISS;
+}
+
+static int hfi1_filter_ib_pkey(void *ibhdr, void *packet_data, void *value)
+{
+
+ u32 lnh = 0;
+ struct hfi1_ib_header *hdr;
+ struct hfi1_other_headers *ohdr = NULL;
+ int ret;
+
+ ret = hfi1_filter_check(ibhdr, "header");
+ if (ret)
+ return ret;
+ ret = hfi1_filter_check(value, "user");
+ if (ret)
+ return ret;
+
+ hdr = (struct hfi1_ib_header *)ibhdr;
+
+ lnh = (be16_to_cpu(hdr->lrh[0]) & 3);
+ if (lnh == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth;
+ else if (lnh == HFI1_LRH_GRH)
+ ohdr = &hdr->u.l.oth;
+ else
+ return HFI1_FILTER_ERR;
+
+ /* P_key is 16-bit entity, however top most bit indicates
+ * type of membership. 0 for limited and 1 for Full.
+ * Limited members cannot accept information from other
+ * Limited members, but communication is allowed between
+ * every other combination of membership.
+ * Hence we'll omit comparing top-most bit while filtering
+ */
+
+ if ((*(u16 *)value & 0x7FFF) ==
+ ((be32_to_cpu(ohdr->bth[0])) & 0x7FFF))
+ return HFI1_FILTER_HIT;
+
+ return HFI1_FILTER_MISS;
+}
+
+/*
+ * If packet_data is NULL then this is coming from one of the send functions.
+ * Thus we know if its an ingressed or egressed packet.
+ */
+static int hfi1_filter_direction(void *ibhdr, void *packet_data, void *value)
+{
+ u8 user_dir = *(u8 *)value;
+ int ret;
+
+ ret = hfi1_filter_check(value, "user");
+ if (ret)
+ return ret;
+
+ if (packet_data) {
+ /* Incoming packet */
+ if (user_dir & HFI1_SNOOP_INGRESS)
+ return HFI1_FILTER_HIT;
+ } else {
+ /* Outgoing packet */
+ if (user_dir & HFI1_SNOOP_EGRESS)
+ return HFI1_FILTER_HIT;
+ }
+
+ return HFI1_FILTER_MISS;
+}
+
+/*
+ * Allocate a snoop packet. The structure that is stored in the ring buffer, not
+ * to be confused with an hfi packet type.
+ */
+static struct snoop_packet *allocate_snoop_packet(u32 hdr_len,
+ u32 data_len,
+ u32 md_len)
+{
+
+ struct snoop_packet *packet = NULL;
+
+ packet = kzalloc(sizeof(struct snoop_packet) + hdr_len + data_len
+ + md_len,
+ GFP_ATOMIC | __GFP_NOWARN);
+ if (likely(packet))
+ INIT_LIST_HEAD(&packet->list);
+
+
+ return packet;
+}
+
+/*
+ * Instead of having snoop and capture code intermixed with the recv functions,
+ * both the interrupt handler and hfi1_ib_rcv() we are going to hijack the call
+ * and land in here for snoop/capture but if not enabled the call will go
+ * through as before. This gives us a single point to constrain all of the snoop
+ * snoop recv logic. There is nothing special that needs to happen for bypass
+ * packets. This routine should not try to look into the packet. It just copied
+ * it. There is no guarantee for filters when it comes to bypass packets as
+ * there is no specific support. Bottom line is this routine does now even know
+ * what a bypass packet is.
+ */
+int snoop_recv_handler(struct hfi1_packet *packet)
+{
+ struct hfi1_pportdata *ppd = packet->rcd->ppd;
+ struct hfi1_ib_header *hdr = packet->hdr;
+ int header_size = packet->hlen;
+ void *data = packet->ebuf;
+ u32 tlen = packet->tlen;
+ struct snoop_packet *s_packet = NULL;
+ int ret;
+ int snoop_mode = 0;
+ u32 md_len = 0;
+ struct capture_md md;
+
+ snoop_dbg("PACKET IN: hdr size %d tlen %d data %p", header_size, tlen,
+ data);
+
+ trace_snoop_capture(ppd->dd, header_size, hdr, tlen - header_size,
+ data);
+
+ if (!ppd->dd->hfi1_snoop.filter_callback) {
+ snoop_dbg("filter not set");
+ ret = HFI1_FILTER_HIT;
+ } else {
+ ret = ppd->dd->hfi1_snoop.filter_callback(hdr, data,
+ ppd->dd->hfi1_snoop.filter_value);
+ }
+
+ switch (ret) {
+ case HFI1_FILTER_ERR:
+ snoop_dbg("Error in filter call");
+ break;
+ case HFI1_FILTER_MISS:
+ snoop_dbg("Filter Miss");
+ break;
+ case HFI1_FILTER_HIT:
+
+ if (ppd->dd->hfi1_snoop.mode_flag & HFI1_PORT_SNOOP_MODE)
+ snoop_mode = 1;
+ if ((snoop_mode == 0) ||
+ unlikely(snoop_flags & SNOOP_USE_METADATA))
+ md_len = sizeof(struct capture_md);
+
+
+ s_packet = allocate_snoop_packet(header_size,
+ tlen - header_size,
+ md_len);
+
+ if (unlikely(s_packet == NULL)) {
+ dd_dev_warn_ratelimited(ppd->dd, "Unable to allocate snoop/capture packet\n");
+ break;
+ }
+
+ if (md_len > 0) {
+ memset(&md, 0, sizeof(struct capture_md));
+ md.port = 1;
+ md.dir = PKT_DIR_INGRESS;
+ md.u.rhf = packet->rhf;
+ memcpy(s_packet->data, &md, md_len);
+ }
+
+ /* We should always have a header */
+ if (hdr) {
+ memcpy(s_packet->data + md_len, hdr, header_size);
+ } else {
+ dd_dev_err(ppd->dd, "Unable to copy header to snoop/capture packet\n");
+ kfree(s_packet);
+ break;
+ }
+
+ /*
+ * Packets with no data are possible. If there is no data needed
+ * to take care of the last 4 bytes which are normally included
+ * with data buffers and are included in tlen. Since we kzalloc
+ * the buffer we do not need to set any values but if we decide
+ * not to use kzalloc we should zero them.
+ */
+ if (data)
+ memcpy(s_packet->data + header_size + md_len, data,
+ tlen - header_size);
+
+ s_packet->total_len = tlen + md_len;
+ snoop_list_add_tail(s_packet, ppd->dd);
+
+ /*
+ * If we are snooping the packet not capturing then throw away
+ * after adding to the list.
+ */
+ snoop_dbg("Capturing packet");
+ if (ppd->dd->hfi1_snoop.mode_flag & HFI1_PORT_SNOOP_MODE) {
+ snoop_dbg("Throwing packet away");
+ /*
+ * If we are dropping the packet we still may need to
+ * handle the case where error flags are set, this is
+ * normally done by the type specific handler but that
+ * won't be called in this case.
+ */
+ if (unlikely(rhf_err_flags(packet->rhf)))
+ handle_eflags(packet);
+
+ /* throw the packet on the floor */
+ return RHF_RCV_CONTINUE;
+ }
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * We do not care what type of packet came in here - just pass it off
+ * to the normal handler.
+ */
+ return ppd->dd->normal_rhf_rcv_functions[rhf_rcv_type(packet->rhf)]
+ (packet);
+}
+
+/*
+ * Handle snooping and capturing packets when sdma is being used.
+ */
+int snoop_send_dma_handler(struct hfi1_qp *qp, struct ahg_ib_header *ibhdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc)
+{
+ pr_alert("Snooping/Capture of Send DMA Packets Is Not Supported!\n");
+ snoop_dbg("Unsupported Operation");
+ return hfi1_verbs_send_dma(qp, ibhdr, hdrwords, ss, len, plen, dwords,
+ 0);
+}
+
+/*
+ * Handle snooping and capturing packets when pio is being used. Does not handle
+ * bypass packets. The only way to send a bypass packet currently is to use the
+ * diagpkt interface. When that interface is enable snoop/capture is not.
+ */
+int snoop_send_pio_handler(struct hfi1_qp *qp, struct ahg_ib_header *ahdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc)
+{
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ struct snoop_packet *s_packet = NULL;
+ u32 *hdr = (u32 *)&ahdr->ibh;
+ u32 length = 0;
+ struct hfi1_sge_state temp_ss;
+ void *data = NULL;
+ void *data_start = NULL;
+ int ret;
+ int snoop_mode = 0;
+ int md_len = 0;
+ struct capture_md md;
+ u32 vl;
+ u32 hdr_len = hdrwords << 2;
+ u32 tlen = HFI1_GET_PKT_LEN(&ahdr->ibh);
+
+ md.u.pbc = 0;
+
+ snoop_dbg("PACKET OUT: hdrword %u len %u plen %u dwords %u tlen %u",
+ hdrwords, len, plen, dwords, tlen);
+ if (ppd->dd->hfi1_snoop.mode_flag & HFI1_PORT_SNOOP_MODE)
+ snoop_mode = 1;
+ if ((snoop_mode == 0) ||
+ unlikely(snoop_flags & SNOOP_USE_METADATA))
+ md_len = sizeof(struct capture_md);
+
+ /* not using ss->total_len as arg 2 b/c that does not count CRC */
+ s_packet = allocate_snoop_packet(hdr_len, tlen - hdr_len, md_len);
+
+ if (unlikely(s_packet == NULL)) {
+ dd_dev_warn_ratelimited(ppd->dd, "Unable to allocate snoop/capture packet\n");
+ goto out;
+ }
+
+ s_packet->total_len = tlen + md_len;
+
+ if (md_len > 0) {
+ memset(&md, 0, sizeof(struct capture_md));
+ md.port = 1;
+ md.dir = PKT_DIR_EGRESS;
+ if (likely(pbc == 0)) {
+ vl = be16_to_cpu(ahdr->ibh.lrh[0]) >> 12;
+ md.u.pbc = create_pbc(ppd, 0, qp->s_srate, vl, plen);
+ } else {
+ md.u.pbc = 0;
+ }
+ memcpy(s_packet->data, &md, md_len);
+ } else {
+ md.u.pbc = pbc;
+ }
+
+ /* Copy header */
+ if (likely(hdr)) {
+ memcpy(s_packet->data + md_len, hdr, hdr_len);
+ } else {
+ dd_dev_err(ppd->dd,
+ "Unable to copy header to snoop/capture packet\n");
+ kfree(s_packet);
+ goto out;
+ }
+
+ if (ss) {
+ data = s_packet->data + hdr_len + md_len;
+ data_start = data;
+
+ /*
+ * Copy SGE State
+ * The update_sge() function below will not modify the
+ * individual SGEs in the array. It will make a copy each time
+ * and operate on that. So we only need to copy this instance
+ * and it won't impact PIO.
+ */
+ temp_ss = *ss;
+ length = len;
+
+ snoop_dbg("Need to copy %d bytes", length);
+ while (length) {
+ void *addr = temp_ss.sge.vaddr;
+ u32 slen = temp_ss.sge.length;
+
+ if (slen > length) {
+ slen = length;
+ snoop_dbg("slen %d > len %d", slen, length);
+ }
+ snoop_dbg("copy %d to %p", slen, addr);
+ memcpy(data, addr, slen);
+ update_sge(&temp_ss, slen);
+ length -= slen;
+ data += slen;
+ snoop_dbg("data is now %p bytes left %d", data, length);
+ }
+ snoop_dbg("Completed SGE copy");
+ }
+
+ /*
+ * Why do the filter check down here? Because the event tracing has its
+ * own filtering and we need to have the walked the SGE list.
+ */
+ if (!ppd->dd->hfi1_snoop.filter_callback) {
+ snoop_dbg("filter not set\n");
+ ret = HFI1_FILTER_HIT;
+ } else {
+ ret = ppd->dd->hfi1_snoop.filter_callback(
+ &ahdr->ibh,
+ NULL,
+ ppd->dd->hfi1_snoop.filter_value);
+ }
+
+ switch (ret) {
+ case HFI1_FILTER_ERR:
+ snoop_dbg("Error in filter call");
+ /* fall through */
+ case HFI1_FILTER_MISS:
+ snoop_dbg("Filter Miss");
+ kfree(s_packet);
+ break;
+ case HFI1_FILTER_HIT:
+ snoop_dbg("Capturing packet");
+ snoop_list_add_tail(s_packet, ppd->dd);
+
+ if (unlikely((snoop_flags & SNOOP_DROP_SEND) &&
+ (ppd->dd->hfi1_snoop.mode_flag &
+ HFI1_PORT_SNOOP_MODE))) {
+ unsigned long flags;
+
+ snoop_dbg("Dropping packet");
+ if (qp->s_wqe) {
+ spin_lock_irqsave(&qp->s_lock, flags);
+ hfi1_send_complete(
+ qp,
+ qp->s_wqe,
+ IB_WC_SUCCESS);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ } else if (qp->ibqp.qp_type == IB_QPT_RC) {
+ spin_lock_irqsave(&qp->s_lock, flags);
+ hfi1_rc_send_complete(qp, &ahdr->ibh);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ }
+ return 0;
+ }
+ break;
+ default:
+ kfree(s_packet);
+ break;
+ }
+out:
+ return hfi1_verbs_send_pio(qp, ahdr, hdrwords, ss, len, plen, dwords,
+ md.u.pbc);
+}
+
+/*
+ * Callers of this must pass a hfi1_ib_header type for the from ptr. Currently
+ * this can be used anywhere, but the intention is for inline ACKs for RC and
+ * CCA packets. We don't restrict this usage though.
+ */
+void snoop_inline_pio_send(struct hfi1_devdata *dd, struct pio_buf *pbuf,
+ u64 pbc, const void *from, size_t count)
+{
+ int snoop_mode = 0;
+ int md_len = 0;
+ struct capture_md md;
+ struct snoop_packet *s_packet = NULL;
+
+ /*
+ * count is in dwords so we need to convert to bytes.
+ * We also need to account for CRC which would be tacked on by hardware.
+ */
+ int packet_len = (count << 2) + 4;
+ int ret;
+
+ snoop_dbg("ACK OUT: len %d", packet_len);
+
+ if (!dd->hfi1_snoop.filter_callback) {
+ snoop_dbg("filter not set");
+ ret = HFI1_FILTER_HIT;
+ } else {
+ ret = dd->hfi1_snoop.filter_callback(
+ (struct hfi1_ib_header *)from,
+ NULL,
+ dd->hfi1_snoop.filter_value);
+ }
+
+ switch (ret) {
+ case HFI1_FILTER_ERR:
+ snoop_dbg("Error in filter call");
+ /* fall through */
+ case HFI1_FILTER_MISS:
+ snoop_dbg("Filter Miss");
+ break;
+ case HFI1_FILTER_HIT:
+ snoop_dbg("Capturing packet");
+ if (dd->hfi1_snoop.mode_flag & HFI1_PORT_SNOOP_MODE)
+ snoop_mode = 1;
+ if ((snoop_mode == 0) ||
+ unlikely(snoop_flags & SNOOP_USE_METADATA))
+ md_len = sizeof(struct capture_md);
+
+ s_packet = allocate_snoop_packet(packet_len, 0, md_len);
+
+ if (unlikely(s_packet == NULL)) {
+ dd_dev_warn_ratelimited(dd, "Unable to allocate snoop/capture packet\n");
+ goto inline_pio_out;
+ }
+
+ s_packet->total_len = packet_len + md_len;
+
+ /* Fill in the metadata for the packet */
+ if (md_len > 0) {
+ memset(&md, 0, sizeof(struct capture_md));
+ md.port = 1;
+ md.dir = PKT_DIR_EGRESS;
+ md.u.pbc = pbc;
+ memcpy(s_packet->data, &md, md_len);
+ }
+
+ /* Add the packet data which is a single buffer */
+ memcpy(s_packet->data + md_len, from, packet_len);
+
+ snoop_list_add_tail(s_packet, dd);
+
+ if (unlikely((snoop_flags & SNOOP_DROP_SEND) && snoop_mode)) {
+ snoop_dbg("Dropping packet");
+ return;
+ }
+ break;
+ default:
+ break;
+ }
+
+inline_pio_out:
+ pio_copy(dd, pbuf, pbc, from, count);
+
+}
diff --git a/drivers/staging/rdma/hfi1/dma.c b/drivers/staging/rdma/hfi1/dma.c
new file mode 100644
index 0000000..e03bd73
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/dma.c
@@ -0,0 +1,186 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <linux/types.h>
+#include <linux/scatterlist.h>
+
+#include "verbs.h"
+
+#define BAD_DMA_ADDRESS ((u64) 0)
+
+/*
+ * The following functions implement driver specific replacements
+ * for the ib_dma_*() functions.
+ *
+ * These functions return kernel virtual addresses instead of
+ * device bus addresses since the driver uses the CPU to copy
+ * data instead of using hardware DMA.
+ */
+
+static int hfi1_mapping_error(struct ib_device *dev, u64 dma_addr)
+{
+ return dma_addr == BAD_DMA_ADDRESS;
+}
+
+static u64 hfi1_dma_map_single(struct ib_device *dev, void *cpu_addr,
+ size_t size, enum dma_data_direction direction)
+{
+ if (WARN_ON(!valid_dma_direction(direction)))
+ return BAD_DMA_ADDRESS;
+
+ return (u64) cpu_addr;
+}
+
+static void hfi1_dma_unmap_single(struct ib_device *dev, u64 addr, size_t size,
+ enum dma_data_direction direction)
+{
+ /* This is a stub, nothing to be done here */
+}
+
+static u64 hfi1_dma_map_page(struct ib_device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction direction)
+{
+ u64 addr;
+
+ if (WARN_ON(!valid_dma_direction(direction)))
+ return BAD_DMA_ADDRESS;
+
+ if (offset + size > PAGE_SIZE)
+ return BAD_DMA_ADDRESS;
+
+ addr = (u64) page_address(page);
+ if (addr)
+ addr += offset;
+
+ return addr;
+}
+
+static void hfi1_dma_unmap_page(struct ib_device *dev, u64 addr, size_t size,
+ enum dma_data_direction direction)
+{
+ /* This is a stub, nothing to be done here */
+}
+
+static int hfi1_map_sg(struct ib_device *dev, struct scatterlist *sgl,
+ int nents, enum dma_data_direction direction)
+{
+ struct scatterlist *sg;
+ u64 addr;
+ int i;
+ int ret = nents;
+
+ if (WARN_ON(!valid_dma_direction(direction)))
+ return BAD_DMA_ADDRESS;
+
+ for_each_sg(sgl, sg, nents, i) {
+ addr = (u64) page_address(sg_page(sg));
+ if (!addr) {
+ ret = 0;
+ break;
+ }
+ sg->dma_address = addr + sg->offset;
+#ifdef CONFIG_NEED_SG_DMA_LENGTH
+ sg->dma_length = sg->length;
+#endif
+ }
+ return ret;
+}
+
+static void hfi1_unmap_sg(struct ib_device *dev,
+ struct scatterlist *sg, int nents,
+ enum dma_data_direction direction)
+{
+ /* This is a stub, nothing to be done here */
+}
+
+static void hfi1_sync_single_for_cpu(struct ib_device *dev, u64 addr,
+ size_t size, enum dma_data_direction dir)
+{
+}
+
+static void hfi1_sync_single_for_device(struct ib_device *dev, u64 addr,
+ size_t size,
+ enum dma_data_direction dir)
+{
+}
+
+static void *hfi1_dma_alloc_coherent(struct ib_device *dev, size_t size,
+ u64 *dma_handle, gfp_t flag)
+{
+ struct page *p;
+ void *addr = NULL;
+
+ p = alloc_pages(flag, get_order(size));
+ if (p)
+ addr = page_address(p);
+ if (dma_handle)
+ *dma_handle = (u64) addr;
+ return addr;
+}
+
+static void hfi1_dma_free_coherent(struct ib_device *dev, size_t size,
+ void *cpu_addr, u64 dma_handle)
+{
+ free_pages((unsigned long) cpu_addr, get_order(size));
+}
+
+struct ib_dma_mapping_ops hfi1_dma_mapping_ops = {
+ .mapping_error = hfi1_mapping_error,
+ .map_single = hfi1_dma_map_single,
+ .unmap_single = hfi1_dma_unmap_single,
+ .map_page = hfi1_dma_map_page,
+ .unmap_page = hfi1_dma_unmap_page,
+ .map_sg = hfi1_map_sg,
+ .unmap_sg = hfi1_unmap_sg,
+ .sync_single_for_cpu = hfi1_sync_single_for_cpu,
+ .sync_single_for_device = hfi1_sync_single_for_device,
+ .alloc_coherent = hfi1_dma_alloc_coherent,
+ .free_coherent = hfi1_dma_free_coherent
+};
diff --git a/drivers/staging/rdma/hfi1/driver.c b/drivers/staging/rdma/hfi1/driver.c
new file mode 100644
index 0000000..c0a5900
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/driver.c
@@ -0,0 +1,1241 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/spinlock.h>
+#include <linux/pci.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/module.h>
+#include <linux/prefetch.h>
+
+#include "hfi.h"
+#include "trace.h"
+#include "qp.h"
+#include "sdma.h"
+
+#undef pr_fmt
+#define pr_fmt(fmt) DRIVER_NAME ": " fmt
+
+/*
+ * The size has to be longer than this string, so we can append
+ * board/chip information to it in the initialization code.
+ */
+const char ib_hfi1_version[] = HFI1_DRIVER_VERSION "\n";
+
+DEFINE_SPINLOCK(hfi1_devs_lock);
+LIST_HEAD(hfi1_dev_list);
+DEFINE_MUTEX(hfi1_mutex); /* general driver use */
+
+unsigned int hfi1_max_mtu = HFI1_DEFAULT_MAX_MTU;
+module_param_named(max_mtu, hfi1_max_mtu, uint, S_IRUGO);
+MODULE_PARM_DESC(max_mtu, "Set max MTU bytes, default is 8192");
+
+unsigned int hfi1_cu = 1;
+module_param_named(cu, hfi1_cu, uint, S_IRUGO);
+MODULE_PARM_DESC(cu, "Credit return units");
+
+unsigned long hfi1_cap_mask = HFI1_CAP_MASK_DEFAULT;
+static int hfi1_caps_set(const char *, const struct kernel_param *);
+static int hfi1_caps_get(char *, const struct kernel_param *);
+static const struct kernel_param_ops cap_ops = {
+ .set = hfi1_caps_set,
+ .get = hfi1_caps_get
+};
+module_param_cb(cap_mask, &cap_ops, &hfi1_cap_mask, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(cap_mask, "Bit mask of enabled/disabled HW features");
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("Intel Omni-Path Architecture driver");
+MODULE_VERSION(HFI1_DRIVER_VERSION);
+
+/*
+ * MAX_PKT_RCV is the max # if packets processed per receive interrupt.
+ */
+#define MAX_PKT_RECV 64
+#define EGR_HEAD_UPDATE_THRESHOLD 16
+
+struct hfi1_ib_stats hfi1_stats;
+
+static int hfi1_caps_set(const char *val, const struct kernel_param *kp)
+{
+ int ret = 0;
+ unsigned long *cap_mask_ptr = (unsigned long *)kp->arg,
+ cap_mask = *cap_mask_ptr, value, diff,
+ write_mask = ((HFI1_CAP_WRITABLE_MASK << HFI1_CAP_USER_SHIFT) |
+ HFI1_CAP_WRITABLE_MASK);
+
+ ret = kstrtoul(val, 0, &value);
+ if (ret) {
+ pr_warn("Invalid module parameter value for 'cap_mask'\n");
+ goto done;
+ }
+ /* Get the changed bits (except the locked bit) */
+ diff = value ^ (cap_mask & ~HFI1_CAP_LOCKED_SMASK);
+
+ /* Remove any bits that are not allowed to change after driver load */
+ if (HFI1_CAP_LOCKED() && (diff & ~write_mask)) {
+ pr_warn("Ignoring non-writable capability bits %#lx\n",
+ diff & ~write_mask);
+ diff &= write_mask;
+ }
+
+ /* Mask off any reserved bits */
+ diff &= ~HFI1_CAP_RESERVED_MASK;
+ /* Clear any previously set and changing bits */
+ cap_mask &= ~diff;
+ /* Update the bits with the new capability */
+ cap_mask |= (value & diff);
+ /* Check for any kernel/user restrictions */
+ diff = (cap_mask & (HFI1_CAP_MUST_HAVE_KERN << HFI1_CAP_USER_SHIFT)) ^
+ ((cap_mask & HFI1_CAP_MUST_HAVE_KERN) << HFI1_CAP_USER_SHIFT);
+ cap_mask &= ~diff;
+ /* Set the bitmask to the final set */
+ *cap_mask_ptr = cap_mask;
+done:
+ return ret;
+}
+
+static int hfi1_caps_get(char *buffer, const struct kernel_param *kp)
+{
+ unsigned long cap_mask = *(unsigned long *)kp->arg;
+
+ cap_mask &= ~HFI1_CAP_LOCKED_SMASK;
+ cap_mask |= ((cap_mask & HFI1_CAP_K2U) << HFI1_CAP_USER_SHIFT);
+
+ return scnprintf(buffer, PAGE_SIZE, "0x%lx", cap_mask);
+}
+
+const char *get_unit_name(int unit)
+{
+ static char iname[16];
+
+ snprintf(iname, sizeof(iname), DRIVER_NAME"_%u", unit);
+ return iname;
+}
+
+/*
+ * Return count of units with at least one port ACTIVE.
+ */
+int hfi1_count_active_units(void)
+{
+ struct hfi1_devdata *dd;
+ struct hfi1_pportdata *ppd;
+ unsigned long flags;
+ int pidx, nunits_active = 0;
+
+ spin_lock_irqsave(&hfi1_devs_lock, flags);
+ list_for_each_entry(dd, &hfi1_dev_list, list) {
+ if (!(dd->flags & HFI1_PRESENT) || !dd->kregbase)
+ continue;
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+ if (ppd->lid && ppd->linkup) {
+ nunits_active++;
+ break;
+ }
+ }
+ }
+ spin_unlock_irqrestore(&hfi1_devs_lock, flags);
+ return nunits_active;
+}
+
+/*
+ * Return count of all units, optionally return in arguments
+ * the number of usable (present) units, and the number of
+ * ports that are up.
+ */
+int hfi1_count_units(int *npresentp, int *nupp)
+{
+ int nunits = 0, npresent = 0, nup = 0;
+ struct hfi1_devdata *dd;
+ unsigned long flags;
+ int pidx;
+ struct hfi1_pportdata *ppd;
+
+ spin_lock_irqsave(&hfi1_devs_lock, flags);
+
+ list_for_each_entry(dd, &hfi1_dev_list, list) {
+ nunits++;
+ if ((dd->flags & HFI1_PRESENT) && dd->kregbase)
+ npresent++;
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+ if (ppd->lid && ppd->linkup)
+ nup++;
+ }
+ }
+
+ spin_unlock_irqrestore(&hfi1_devs_lock, flags);
+
+ if (npresentp)
+ *npresentp = npresent;
+ if (nupp)
+ *nupp = nup;
+
+ return nunits;
+}
+
+/*
+ * Get address of eager buffer from it's index (allocated in chunks, not
+ * contiguous).
+ */
+static inline void *get_egrbuf(const struct hfi1_ctxtdata *rcd, u64 rhf,
+ u8 *update)
+{
+ u32 idx = rhf_egr_index(rhf), offset = rhf_egr_buf_offset(rhf);
+
+ *update |= !(idx & (rcd->egrbufs.threshold - 1)) && !offset;
+ return (void *)(((u64)(rcd->egrbufs.rcvtids[idx].addr)) +
+ (offset * RCV_BUF_BLOCK_SIZE));
+}
+
+/*
+ * Validate and encode the a given RcvArray Buffer size.
+ * The function will check whether the given size falls within
+ * allowed size ranges for the respective type and, optionally,
+ * return the proper encoding.
+ */
+inline int hfi1_rcvbuf_validate(u32 size, u8 type, u16 *encoded)
+{
+ if (unlikely(!IS_ALIGNED(size, PAGE_SIZE)))
+ return 0;
+ if (unlikely(size < MIN_EAGER_BUFFER))
+ return 0;
+ if (size >
+ (type == PT_EAGER ? MAX_EAGER_BUFFER : MAX_EXPECTED_BUFFER))
+ return 0;
+ if (encoded)
+ *encoded = ilog2(size / PAGE_SIZE) + 1;
+ return 1;
+}
+
+static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd,
+ struct hfi1_packet *packet)
+{
+ struct hfi1_message_header *rhdr = packet->hdr;
+ u32 rte = rhf_rcv_type_err(packet->rhf);
+ int lnh = be16_to_cpu(rhdr->lrh[0]) & 3;
+ struct hfi1_ibport *ibp = &ppd->ibport_data;
+
+ if (packet->rhf & (RHF_VCRC_ERR | RHF_ICRC_ERR))
+ return;
+
+ if (packet->rhf & RHF_TID_ERR) {
+ /* For TIDERR and RC QPs preemptively schedule a NAK */
+ struct hfi1_ib_header *hdr = (struct hfi1_ib_header *)rhdr;
+ struct hfi1_other_headers *ohdr = NULL;
+ u32 tlen = rhf_pkt_len(packet->rhf); /* in bytes */
+ u16 lid = be16_to_cpu(hdr->lrh[1]);
+ u32 qp_num;
+ u32 rcv_flags = 0;
+
+ /* Sanity check packet */
+ if (tlen < 24)
+ goto drop;
+
+ /* Check for GRH */
+ if (lnh == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth;
+ else if (lnh == HFI1_LRH_GRH) {
+ u32 vtf;
+
+ ohdr = &hdr->u.l.oth;
+ if (hdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR)
+ goto drop;
+ vtf = be32_to_cpu(hdr->u.l.grh.version_tclass_flow);
+ if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
+ goto drop;
+ rcv_flags |= HFI1_HAS_GRH;
+ } else
+ goto drop;
+
+ /* Get the destination QP number. */
+ qp_num = be32_to_cpu(ohdr->bth[1]) & HFI1_QPN_MASK;
+ if (lid < HFI1_MULTICAST_LID_BASE) {
+ struct hfi1_qp *qp;
+
+ rcu_read_lock();
+ qp = hfi1_lookup_qpn(ibp, qp_num);
+ if (!qp) {
+ rcu_read_unlock();
+ goto drop;
+ }
+
+ /*
+ * Handle only RC QPs - for other QP types drop error
+ * packet.
+ */
+ spin_lock(&qp->r_lock);
+
+ /* Check for valid receive state. */
+ if (!(ib_hfi1_state_ops[qp->state] &
+ HFI1_PROCESS_RECV_OK)) {
+ ibp->n_pkt_drops++;
+ }
+
+ switch (qp->ibqp.qp_type) {
+ case IB_QPT_RC:
+ hfi1_rc_hdrerr(
+ rcd,
+ hdr,
+ rcv_flags,
+ qp);
+ break;
+ default:
+ /* For now don't handle any other QP types */
+ break;
+ }
+
+ spin_unlock(&qp->r_lock);
+ rcu_read_unlock();
+ } /* Unicast QP */
+ } /* Valid packet with TIDErr */
+
+ /* handle "RcvTypeErr" flags */
+ switch (rte) {
+ case RHF_RTE_ERROR_OP_CODE_ERR:
+ {
+ u32 opcode;
+ void *ebuf = NULL;
+ __be32 *bth = NULL;
+
+ if (rhf_use_egr_bfr(packet->rhf))
+ ebuf = packet->ebuf;
+
+ if (ebuf == NULL)
+ goto drop; /* this should never happen */
+
+ if (lnh == HFI1_LRH_BTH)
+ bth = (__be32 *)ebuf;
+ else if (lnh == HFI1_LRH_GRH)
+ bth = (__be32 *)((char *)ebuf + sizeof(struct ib_grh));
+ else
+ goto drop;
+
+ opcode = be32_to_cpu(bth[0]) >> 24;
+ opcode &= 0xff;
+
+ if (opcode == IB_OPCODE_CNP) {
+ /*
+ * Only in pre-B0 h/w is the CNP_OPCODE handled
+ * via this code path (errata 291394).
+ */
+ struct hfi1_qp *qp = NULL;
+ u32 lqpn, rqpn;
+ u16 rlid;
+ u8 svc_type, sl, sc5;
+
+ sc5 = (be16_to_cpu(rhdr->lrh[0]) >> 12) & 0xf;
+ if (rhf_dc_info(packet->rhf))
+ sc5 |= 0x10;
+ sl = ibp->sc_to_sl[sc5];
+
+ lqpn = be32_to_cpu(bth[1]) & HFI1_QPN_MASK;
+ rcu_read_lock();
+ qp = hfi1_lookup_qpn(ibp, lqpn);
+ if (qp == NULL) {
+ rcu_read_unlock();
+ goto drop;
+ }
+
+ switch (qp->ibqp.qp_type) {
+ case IB_QPT_UD:
+ rlid = 0;
+ rqpn = 0;
+ svc_type = IB_CC_SVCTYPE_UD;
+ break;
+ case IB_QPT_UC:
+ rlid = be16_to_cpu(rhdr->lrh[3]);
+ rqpn = qp->remote_qpn;
+ svc_type = IB_CC_SVCTYPE_UC;
+ break;
+ default:
+ goto drop;
+ }
+
+ process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
+ rcu_read_unlock();
+ }
+
+ packet->rhf &= ~RHF_RCV_TYPE_ERR_SMASK;
+ break;
+ }
+ default:
+ break;
+ }
+
+drop:
+ return;
+}
+
+static inline void init_packet(struct hfi1_ctxtdata *rcd,
+ struct hfi1_packet *packet)
+{
+
+ packet->rsize = rcd->rcvhdrqentsize; /* words */
+ packet->maxcnt = rcd->rcvhdrq_cnt * packet->rsize; /* words */
+ packet->rcd = rcd;
+ packet->updegr = 0;
+ packet->etail = -1;
+ packet->rhf_addr = (__le32 *) rcd->rcvhdrq + rcd->head +
+ rcd->dd->rhf_offset;
+ packet->rhf = rhf_to_cpu(packet->rhf_addr);
+ packet->rhqoff = rcd->head;
+ packet->numpkt = 0;
+ packet->rcv_flags = 0;
+}
+
+#ifndef CONFIG_PRESCAN_RXQ
+static void prescan_rxq(struct hfi1_packet *packet) {}
+#else /* CONFIG_PRESCAN_RXQ */
+static int prescan_receive_queue;
+
+static void process_ecn(struct hfi1_qp *qp, struct hfi1_ib_header *hdr,
+ struct hfi1_other_headers *ohdr,
+ u64 rhf, struct ib_grh *grh)
+{
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ u32 bth1;
+ u8 sc5, svc_type;
+ int is_fecn, is_becn;
+
+ switch (qp->ibqp.qp_type) {
+ case IB_QPT_UD:
+ svc_type = IB_CC_SVCTYPE_UD;
+ break;
+ case IB_QPT_UC: /* LATER */
+ case IB_QPT_RC: /* LATER */
+ default:
+ return;
+ }
+
+ is_fecn = (be32_to_cpu(ohdr->bth[1]) >> HFI1_FECN_SHIFT) &
+ HFI1_FECN_MASK;
+ is_becn = (be32_to_cpu(ohdr->bth[1]) >> HFI1_BECN_SHIFT) &
+ HFI1_BECN_MASK;
+
+ sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf;
+ if (rhf_dc_info(rhf))
+ sc5 |= 0x10;
+
+ if (is_fecn) {
+ u32 src_qpn = be32_to_cpu(ohdr->u.ud.deth[1]) & HFI1_QPN_MASK;
+ u16 pkey = (u16)be32_to_cpu(ohdr->bth[0]);
+ u16 dlid = be16_to_cpu(hdr->lrh[1]);
+ u16 slid = be16_to_cpu(hdr->lrh[3]);
+
+ return_cnp(ibp, qp, src_qpn, pkey, dlid, slid, sc5, grh);
+ }
+
+ if (is_becn) {
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u32 lqpn = be32_to_cpu(ohdr->bth[1]) & HFI1_QPN_MASK;
+ u8 sl = ibp->sc_to_sl[sc5];
+
+ process_becn(ppd, sl, 0, lqpn, 0, svc_type);
+ }
+
+ /* turn off BECN, or FECN */
+ bth1 = be32_to_cpu(ohdr->bth[1]);
+ bth1 &= ~(HFI1_FECN_MASK << HFI1_FECN_SHIFT);
+ bth1 &= ~(HFI1_BECN_MASK << HFI1_BECN_SHIFT);
+ ohdr->bth[1] = cpu_to_be32(bth1);
+}
+
+struct ps_mdata {
+ struct hfi1_ctxtdata *rcd;
+ u32 rsize;
+ u32 maxcnt;
+ u32 ps_head;
+ u32 ps_tail;
+ u32 ps_seq;
+};
+
+static inline void init_ps_mdata(struct ps_mdata *mdata,
+ struct hfi1_packet *packet)
+{
+ struct hfi1_ctxtdata *rcd = packet->rcd;
+
+ mdata->rcd = rcd;
+ mdata->rsize = packet->rsize;
+ mdata->maxcnt = packet->maxcnt;
+
+ if (rcd->ps_state.initialized == 0) {
+ mdata->ps_head = packet->rhqoff;
+ rcd->ps_state.initialized++;
+ } else
+ mdata->ps_head = rcd->ps_state.ps_head;
+
+ if (HFI1_CAP_IS_KSET(DMA_RTAIL)) {
+ mdata->ps_tail = packet->hdrqtail;
+ mdata->ps_seq = 0; /* not used with DMA_RTAIL */
+ } else {
+ mdata->ps_tail = 0; /* used only with DMA_RTAIL*/
+ mdata->ps_seq = rcd->seq_cnt;
+ }
+}
+
+static inline int ps_done(struct ps_mdata *mdata, u64 rhf)
+{
+ if (HFI1_CAP_IS_KSET(DMA_RTAIL))
+ return mdata->ps_head == mdata->ps_tail;
+ return mdata->ps_seq != rhf_rcv_seq(rhf);
+}
+
+static inline void update_ps_mdata(struct ps_mdata *mdata)
+{
+ struct hfi1_ctxtdata *rcd = mdata->rcd;
+
+ mdata->ps_head += mdata->rsize;
+ if (mdata->ps_head > mdata->maxcnt)
+ mdata->ps_head = 0;
+ rcd->ps_state.ps_head = mdata->ps_head;
+ if (!HFI1_CAP_IS_KSET(DMA_RTAIL)) {
+ if (++mdata->ps_seq > 13)
+ mdata->ps_seq = 1;
+ }
+}
+
+/*
+ * prescan_rxq - search through the receive queue looking for packets
+ * containing Excplicit Congestion Notifications (FECNs, or BECNs).
+ * When an ECN is found, process the Congestion Notification, and toggle
+ * it off.
+ */
+static void prescan_rxq(struct hfi1_packet *packet)
+{
+ struct hfi1_ctxtdata *rcd = packet->rcd;
+ struct ps_mdata mdata;
+
+ if (!prescan_receive_queue)
+ return;
+
+ init_ps_mdata(&mdata, packet);
+
+ while (1) {
+ struct hfi1_devdata *dd = rcd->dd;
+ struct hfi1_ibport *ibp = &rcd->ppd->ibport_data;
+ __le32 *rhf_addr = (__le32 *) rcd->rcvhdrq + mdata.ps_head +
+ dd->rhf_offset;
+ struct hfi1_qp *qp;
+ struct hfi1_ib_header *hdr;
+ struct hfi1_other_headers *ohdr;
+ struct ib_grh *grh = NULL;
+ u64 rhf = rhf_to_cpu(rhf_addr);
+ u32 etype = rhf_rcv_type(rhf), qpn;
+ int is_ecn = 0;
+ u8 lnh;
+
+ if (ps_done(&mdata, rhf))
+ break;
+
+ if (etype != RHF_RCV_TYPE_IB)
+ goto next;
+
+ hdr = (struct hfi1_ib_header *)
+ hfi1_get_msgheader(dd, rhf_addr);
+ lnh = be16_to_cpu(hdr->lrh[0]) & 3;
+
+ if (lnh == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth;
+ else if (lnh == HFI1_LRH_GRH) {
+ ohdr = &hdr->u.l.oth;
+ grh = &hdr->u.l.grh;
+ } else
+ goto next; /* just in case */
+
+ is_ecn |= be32_to_cpu(ohdr->bth[1]) &
+ (HFI1_FECN_MASK << HFI1_FECN_SHIFT);
+ is_ecn |= be32_to_cpu(ohdr->bth[1]) &
+ (HFI1_BECN_MASK << HFI1_BECN_SHIFT);
+
+ if (!is_ecn)
+ goto next;
+
+ qpn = be32_to_cpu(ohdr->bth[1]) & HFI1_QPN_MASK;
+ rcu_read_lock();
+ qp = hfi1_lookup_qpn(ibp, qpn);
+
+ if (qp == NULL) {
+ rcu_read_unlock();
+ goto next;
+ }
+
+ process_ecn(qp, hdr, ohdr, rhf, grh);
+ rcu_read_unlock();
+next:
+ update_ps_mdata(&mdata);
+ }
+}
+#endif /* CONFIG_PRESCAN_RXQ */
+
+#define RCV_PKT_OK 0x0
+#define RCV_PKT_MAX 0x1
+
+static inline int process_rcv_packet(struct hfi1_packet *packet)
+{
+ int ret = RCV_PKT_OK;
+
+ packet->hdr = hfi1_get_msgheader(packet->rcd->dd,
+ packet->rhf_addr);
+ packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr;
+ packet->etype = rhf_rcv_type(packet->rhf);
+ /* total length */
+ packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */
+ /* retrieve eager buffer details */
+ packet->ebuf = NULL;
+ if (rhf_use_egr_bfr(packet->rhf)) {
+ packet->etail = rhf_egr_index(packet->rhf);
+ packet->ebuf = get_egrbuf(packet->rcd, packet->rhf,
+ &packet->updegr);
+ /*
+ * Prefetch the contents of the eager buffer. It is
+ * OK to send a negative length to prefetch_range().
+ * The +2 is the size of the RHF.
+ */
+ prefetch_range(packet->ebuf,
+ packet->tlen - ((packet->rcd->rcvhdrqentsize -
+ (rhf_hdrq_offset(packet->rhf)+2)) * 4));
+ }
+
+ /*
+ * Call a type specific handler for the packet. We
+ * should be able to trust that etype won't be beyond
+ * the range of valid indexes. If so something is really
+ * wrong and we can probably just let things come
+ * crashing down. There is no need to eat another
+ * comparison in this performance critical code.
+ */
+ packet->rcd->dd->rhf_rcv_function_map[packet->etype](packet);
+ packet->numpkt++;
+
+ /* Set up for the next packet */
+ packet->rhqoff += packet->rsize;
+ if (packet->rhqoff >= packet->maxcnt)
+ packet->rhqoff = 0;
+
+ if (packet->numpkt == MAX_PKT_RECV) {
+ ret = RCV_PKT_MAX;
+ this_cpu_inc(*packet->rcd->dd->rcv_limit);
+ }
+
+ packet->rhf_addr = (__le32 *) packet->rcd->rcvhdrq + packet->rhqoff +
+ packet->rcd->dd->rhf_offset;
+ packet->rhf = rhf_to_cpu(packet->rhf_addr);
+
+ return ret;
+}
+
+static inline void process_rcv_update(int last, struct hfi1_packet *packet)
+{
+ /*
+ * Update head regs etc., every 16 packets, if not last pkt,
+ * to help prevent rcvhdrq overflows, when many packets
+ * are processed and queue is nearly full.
+ * Don't request an interrupt for intermediate updates.
+ */
+ if (!last && !(packet->numpkt & 0xf)) {
+ update_usrhead(packet->rcd, packet->rhqoff, packet->updegr,
+ packet->etail, 0, 0);
+ packet->updegr = 0;
+ }
+ packet->rcv_flags = 0;
+}
+
+static inline void finish_packet(struct hfi1_packet *packet)
+{
+
+ /*
+ * Nothing we need to free for the packet.
+ *
+ * The only thing we need to do is a final update and call for an
+ * interrupt
+ */
+ update_usrhead(packet->rcd, packet->rcd->head, packet->updegr,
+ packet->etail, rcv_intr_dynamic, packet->numpkt);
+
+}
+
+static inline void process_rcv_qp_work(struct hfi1_packet *packet)
+{
+
+ struct hfi1_ctxtdata *rcd;
+ struct hfi1_qp *qp, *nqp;
+
+ rcd = packet->rcd;
+ rcd->head = packet->rhqoff;
+
+ /*
+ * Iterate over all QPs waiting to respond.
+ * The list won't change since the IRQ is only run on one CPU.
+ */
+ list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) {
+ list_del_init(&qp->rspwait);
+ if (qp->r_flags & HFI1_R_RSP_NAK) {
+ qp->r_flags &= ~HFI1_R_RSP_NAK;
+ hfi1_send_rc_ack(rcd, qp, 0);
+ }
+ if (qp->r_flags & HFI1_R_RSP_SEND) {
+ unsigned long flags;
+
+ qp->r_flags &= ~HFI1_R_RSP_SEND;
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (ib_hfi1_state_ops[qp->state] &
+ HFI1_PROCESS_OR_FLUSH_SEND)
+ hfi1_schedule_send(qp);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ }
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+ }
+}
+
+/*
+ * Handle receive interrupts when using the no dma rtail option.
+ */
+void handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd)
+{
+ u32 seq;
+ int last = 0;
+ struct hfi1_packet packet;
+
+ init_packet(rcd, &packet);
+ seq = rhf_rcv_seq(packet.rhf);
+ if (seq != rcd->seq_cnt)
+ goto bail;
+
+ prescan_rxq(&packet);
+
+ while (!last) {
+ last = process_rcv_packet(&packet);
+ seq = rhf_rcv_seq(packet.rhf);
+ if (++rcd->seq_cnt > 13)
+ rcd->seq_cnt = 1;
+ if (seq != rcd->seq_cnt)
+ last = 1;
+ process_rcv_update(last, &packet);
+ }
+ process_rcv_qp_work(&packet);
+bail:
+ finish_packet(&packet);
+}
+
+void handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd)
+{
+ u32 hdrqtail;
+ int last = 0;
+ struct hfi1_packet packet;
+
+ init_packet(rcd, &packet);
+ hdrqtail = get_rcvhdrtail(rcd);
+ if (packet.rhqoff == hdrqtail)
+ goto bail;
+ smp_rmb(); /* prevent speculative reads of dma'ed hdrq */
+
+ prescan_rxq(&packet);
+
+ while (!last) {
+ last = process_rcv_packet(&packet);
+ if (packet.rhqoff == hdrqtail)
+ last = 1;
+ process_rcv_update(last, &packet);
+ }
+ process_rcv_qp_work(&packet);
+bail:
+ finish_packet(&packet);
+
+}
+
+static inline void set_all_nodma_rtail(struct hfi1_devdata *dd)
+{
+ int i;
+
+ for (i = 0; i < dd->first_user_ctxt; i++)
+ dd->rcd[i]->do_interrupt =
+ &handle_receive_interrupt_nodma_rtail;
+}
+
+static inline void set_all_dma_rtail(struct hfi1_devdata *dd)
+{
+ int i;
+
+ for (i = 0; i < dd->first_user_ctxt; i++)
+ dd->rcd[i]->do_interrupt =
+ &handle_receive_interrupt_dma_rtail;
+}
+
+/*
+ * handle_receive_interrupt - receive a packet
+ * @rcd: the context
+ *
+ * Called from interrupt handler for errors or receive interrupt.
+ * This is the slow path interrupt handler.
+ */
+void handle_receive_interrupt(struct hfi1_ctxtdata *rcd)
+{
+
+ struct hfi1_devdata *dd = rcd->dd;
+ u32 hdrqtail;
+ int last = 0, needset = 1;
+ struct hfi1_packet packet;
+
+ init_packet(rcd, &packet);
+
+ if (!HFI1_CAP_IS_KSET(DMA_RTAIL)) {
+ u32 seq = rhf_rcv_seq(packet.rhf);
+
+ if (seq != rcd->seq_cnt)
+ goto bail;
+ hdrqtail = 0;
+ } else {
+ hdrqtail = get_rcvhdrtail(rcd);
+ if (packet.rhqoff == hdrqtail)
+ goto bail;
+ smp_rmb(); /* prevent speculative reads of dma'ed hdrq */
+ }
+
+ prescan_rxq(&packet);
+
+ while (!last) {
+
+ if (unlikely(dd->do_drop && atomic_xchg(&dd->drop_packet,
+ DROP_PACKET_OFF) == DROP_PACKET_ON)) {
+ dd->do_drop = 0;
+
+ /* On to the next packet */
+ packet.rhqoff += packet.rsize;
+ packet.rhf_addr = (__le32 *) rcd->rcvhdrq +
+ packet.rhqoff +
+ dd->rhf_offset;
+ packet.rhf = rhf_to_cpu(packet.rhf_addr);
+
+ } else {
+ last = process_rcv_packet(&packet);
+ }
+
+ if (!HFI1_CAP_IS_KSET(DMA_RTAIL)) {
+ u32 seq = rhf_rcv_seq(packet.rhf);
+
+ if (++rcd->seq_cnt > 13)
+ rcd->seq_cnt = 1;
+ if (seq != rcd->seq_cnt)
+ last = 1;
+ if (needset) {
+ dd_dev_info(dd,
+ "Switching to NO_DMA_RTAIL\n");
+ set_all_nodma_rtail(dd);
+ needset = 0;
+ }
+ } else {
+ if (packet.rhqoff == hdrqtail)
+ last = 1;
+ if (needset) {
+ dd_dev_info(dd,
+ "Switching to DMA_RTAIL\n");
+ set_all_dma_rtail(dd);
+ needset = 0;
+ }
+ }
+
+ process_rcv_update(last, &packet);
+ }
+
+ process_rcv_qp_work(&packet);
+
+bail:
+ /*
+ * Always write head at end, and setup rcv interrupt, even
+ * if no packets were processed.
+ */
+ finish_packet(&packet);
+}
+
+/*
+ * Convert a given MTU size to the on-wire MAD packet enumeration.
+ * Return -1 if the size is invalid.
+ */
+int mtu_to_enum(u32 mtu, int default_if_bad)
+{
+ switch (mtu) {
+ case 0: return OPA_MTU_0;
+ case 256: return OPA_MTU_256;
+ case 512: return OPA_MTU_512;
+ case 1024: return OPA_MTU_1024;
+ case 2048: return OPA_MTU_2048;
+ case 4096: return OPA_MTU_4096;
+ case 8192: return OPA_MTU_8192;
+ case 10240: return OPA_MTU_10240;
+ }
+ return default_if_bad;
+}
+
+u16 enum_to_mtu(int mtu)
+{
+ switch (mtu) {
+ case OPA_MTU_0: return 0;
+ case OPA_MTU_256: return 256;
+ case OPA_MTU_512: return 512;
+ case OPA_MTU_1024: return 1024;
+ case OPA_MTU_2048: return 2048;
+ case OPA_MTU_4096: return 4096;
+ case OPA_MTU_8192: return 8192;
+ case OPA_MTU_10240: return 10240;
+ default: return 0xffff;
+ }
+}
+
+/*
+ * set_mtu - set the MTU
+ * @ppd: the per port data
+ *
+ * We can handle "any" incoming size, the issue here is whether we
+ * need to restrict our outgoing size. We do not deal with what happens
+ * to programs that are already running when the size changes.
+ */
+int set_mtu(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ int i, drain, ret = 0, is_up = 0;
+
+ ppd->ibmtu = 0;
+ for (i = 0; i < ppd->vls_supported; i++)
+ if (ppd->ibmtu < dd->vld[i].mtu)
+ ppd->ibmtu = dd->vld[i].mtu;
+ ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd);
+
+ mutex_lock(&ppd->hls_lock);
+ if (ppd->host_link_state == HLS_UP_INIT
+ || ppd->host_link_state == HLS_UP_ARMED
+ || ppd->host_link_state == HLS_UP_ACTIVE)
+ is_up = 1;
+
+ drain = !is_ax(dd) && is_up;
+
+ if (drain)
+ /*
+ * MTU is specified per-VL. To ensure that no packet gets
+ * stuck (due, e.g., to the MTU for the packet's VL being
+ * reduced), empty the per-VL FIFOs before adjusting MTU.
+ */
+ ret = stop_drain_data_vls(dd);
+
+ if (ret) {
+ dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n",
+ __func__);
+ goto err;
+ }
+
+ hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0);
+
+ if (drain)
+ open_fill_data_vls(dd); /* reopen all VLs */
+
+err:
+ mutex_unlock(&ppd->hls_lock);
+
+ return ret;
+}
+
+int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+
+ ppd->lid = lid;
+ ppd->lmc = lmc;
+ hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0);
+
+ dd_dev_info(dd, "IB%u:%u got a lid: 0x%x\n", dd->unit, ppd->port, lid);
+
+ return 0;
+}
+
+/*
+ * Following deal with the "obviously simple" task of overriding the state
+ * of the LEDs, which normally indicate link physical and logical status.
+ * The complications arise in dealing with different hardware mappings
+ * and the board-dependent routine being called from interrupts.
+ * and then there's the requirement to _flash_ them.
+ */
+#define LED_OVER_FREQ_SHIFT 8
+#define LED_OVER_FREQ_MASK (0xFF<<LED_OVER_FREQ_SHIFT)
+/* Below is "non-zero" to force override, but both actual LEDs are off */
+#define LED_OVER_BOTH_OFF (8)
+
+static void run_led_override(unsigned long opaque)
+{
+ struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)opaque;
+ struct hfi1_devdata *dd = ppd->dd;
+ int timeoff;
+ int ph_idx;
+
+ if (!(dd->flags & HFI1_INITTED))
+ return;
+
+ ph_idx = ppd->led_override_phase++ & 1;
+ ppd->led_override = ppd->led_override_vals[ph_idx];
+ timeoff = ppd->led_override_timeoff;
+
+ /*
+ * don't re-fire the timer if user asked for it to be off; we let
+ * it fire one more time after they turn it off to simplify
+ */
+ if (ppd->led_override_vals[0] || ppd->led_override_vals[1])
+ mod_timer(&ppd->led_override_timer, jiffies + timeoff);
+}
+
+void hfi1_set_led_override(struct hfi1_pportdata *ppd, unsigned int val)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ int timeoff, freq;
+
+ if (!(dd->flags & HFI1_INITTED))
+ return;
+
+ /* First check if we are blinking. If not, use 1HZ polling */
+ timeoff = HZ;
+ freq = (val & LED_OVER_FREQ_MASK) >> LED_OVER_FREQ_SHIFT;
+
+ if (freq) {
+ /* For blink, set each phase from one nybble of val */
+ ppd->led_override_vals[0] = val & 0xF;
+ ppd->led_override_vals[1] = (val >> 4) & 0xF;
+ timeoff = (HZ << 4)/freq;
+ } else {
+ /* Non-blink set both phases the same. */
+ ppd->led_override_vals[0] = val & 0xF;
+ ppd->led_override_vals[1] = val & 0xF;
+ }
+ ppd->led_override_timeoff = timeoff;
+
+ /*
+ * If the timer has not already been started, do so. Use a "quick"
+ * timeout so the function will be called soon, to look at our request.
+ */
+ if (atomic_inc_return(&ppd->led_override_timer_active) == 1) {
+ /* Need to start timer */
+ init_timer(&ppd->led_override_timer);
+ ppd->led_override_timer.function = run_led_override;
+ ppd->led_override_timer.data = (unsigned long) ppd;
+ ppd->led_override_timer.expires = jiffies + 1;
+ add_timer(&ppd->led_override_timer);
+ } else {
+ if (ppd->led_override_vals[0] || ppd->led_override_vals[1])
+ mod_timer(&ppd->led_override_timer, jiffies + 1);
+ atomic_dec(&ppd->led_override_timer_active);
+ }
+}
+
+/**
+ * hfi1_reset_device - reset the chip if possible
+ * @unit: the device to reset
+ *
+ * Whether or not reset is successful, we attempt to re-initialize the chip
+ * (that is, much like a driver unload/reload). We clear the INITTED flag
+ * so that the various entry points will fail until we reinitialize. For
+ * now, we only allow this if no user contexts are open that use chip resources
+ */
+int hfi1_reset_device(int unit)
+{
+ int ret, i;
+ struct hfi1_devdata *dd = hfi1_lookup(unit);
+ struct hfi1_pportdata *ppd;
+ unsigned long flags;
+ int pidx;
+
+ if (!dd) {
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ dd_dev_info(dd, "Reset on unit %u requested\n", unit);
+
+ if (!dd->kregbase || !(dd->flags & HFI1_PRESENT)) {
+ dd_dev_info(dd,
+ "Invalid unit number %u or not initialized or not present\n",
+ unit);
+ ret = -ENXIO;
+ goto bail;
+ }
+
+ spin_lock_irqsave(&dd->uctxt_lock, flags);
+ if (dd->rcd)
+ for (i = dd->first_user_ctxt; i < dd->num_rcv_contexts; i++) {
+ if (!dd->rcd[i] || !dd->rcd[i]->cnt)
+ continue;
+ spin_unlock_irqrestore(&dd->uctxt_lock, flags);
+ ret = -EBUSY;
+ goto bail;
+ }
+ spin_unlock_irqrestore(&dd->uctxt_lock, flags);
+
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+ if (atomic_read(&ppd->led_override_timer_active)) {
+ /* Need to stop LED timer, _then_ shut off LEDs */
+ del_timer_sync(&ppd->led_override_timer);
+ atomic_set(&ppd->led_override_timer_active, 0);
+ }
+
+ /* Shut off LEDs after we are sure timer is not running */
+ ppd->led_override = LED_OVER_BOTH_OFF;
+ }
+ if (dd->flags & HFI1_HAS_SEND_DMA)
+ sdma_exit(dd);
+
+ hfi1_reset_cpu_counters(dd);
+
+ ret = hfi1_init(dd, 1);
+
+ if (ret)
+ dd_dev_err(dd,
+ "Reinitialize unit %u after reset failed with %d\n",
+ unit, ret);
+ else
+ dd_dev_info(dd, "Reinitialized unit %u after resetting\n",
+ unit);
+
+bail:
+ return ret;
+}
+
+void handle_eflags(struct hfi1_packet *packet)
+{
+ struct hfi1_ctxtdata *rcd = packet->rcd;
+ u32 rte = rhf_rcv_type_err(packet->rhf);
+
+ dd_dev_err(rcd->dd,
+ "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n",
+ rcd->ctxt, packet->rhf,
+ packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "",
+ packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "",
+ packet->rhf & RHF_DC_ERR ? "dc " : "",
+ packet->rhf & RHF_TID_ERR ? "tid " : "",
+ packet->rhf & RHF_LEN_ERR ? "len " : "",
+ packet->rhf & RHF_ECC_ERR ? "ecc " : "",
+ packet->rhf & RHF_VCRC_ERR ? "vcrc " : "",
+ packet->rhf & RHF_ICRC_ERR ? "icrc " : "",
+ rte);
+
+ rcv_hdrerr(rcd, rcd->ppd, packet);
+}
+
+/*
+ * The following functions are called by the interrupt handler. They are type
+ * specific handlers for each packet type.
+ */
+int process_receive_ib(struct hfi1_packet *packet)
+{
+ trace_hfi1_rcvhdr(packet->rcd->ppd->dd,
+ packet->rcd->ctxt,
+ rhf_err_flags(packet->rhf),
+ RHF_RCV_TYPE_IB,
+ packet->hlen,
+ packet->tlen,
+ packet->updegr,
+ rhf_egr_index(packet->rhf));
+
+ if (unlikely(rhf_err_flags(packet->rhf))) {
+ handle_eflags(packet);
+ return RHF_RCV_CONTINUE;
+ }
+
+ hfi1_ib_rcv(packet);
+ return RHF_RCV_CONTINUE;
+}
+
+int process_receive_bypass(struct hfi1_packet *packet)
+{
+ if (unlikely(rhf_err_flags(packet->rhf)))
+ handle_eflags(packet);
+
+ dd_dev_err(packet->rcd->dd,
+ "Bypass packets are not supported in normal operation. Dropping\n");
+ return RHF_RCV_CONTINUE;
+}
+
+int process_receive_error(struct hfi1_packet *packet)
+{
+ handle_eflags(packet);
+
+ if (unlikely(rhf_err_flags(packet->rhf)))
+ dd_dev_err(packet->rcd->dd,
+ "Unhandled error packet received. Dropping.\n");
+
+ return RHF_RCV_CONTINUE;
+}
+
+int kdeth_process_expected(struct hfi1_packet *packet)
+{
+ if (unlikely(rhf_err_flags(packet->rhf)))
+ handle_eflags(packet);
+
+ dd_dev_err(packet->rcd->dd,
+ "Unhandled expected packet received. Dropping.\n");
+ return RHF_RCV_CONTINUE;
+}
+
+int kdeth_process_eager(struct hfi1_packet *packet)
+{
+ if (unlikely(rhf_err_flags(packet->rhf)))
+ handle_eflags(packet);
+
+ dd_dev_err(packet->rcd->dd,
+ "Unhandled eager packet received. Dropping.\n");
+ return RHF_RCV_CONTINUE;
+}
+
+int process_receive_invalid(struct hfi1_packet *packet)
+{
+ dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n",
+ rhf_rcv_type(packet->rhf));
+ return RHF_RCV_CONTINUE;
+}
diff --git a/drivers/staging/rdma/hfi1/eprom.c b/drivers/staging/rdma/hfi1/eprom.c
new file mode 100644
index 0000000..b61d3ae
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/eprom.c
@@ -0,0 +1,475 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <linux/delay.h>
+#include "hfi.h"
+#include "common.h"
+#include "eprom.h"
+
+/*
+ * The EPROM is logically divided into two partitions:
+ * partition 0: the first 128K, visible from PCI ROM BAR
+ * partition 1: the rest
+ */
+#define P0_SIZE (128 * 1024)
+#define P1_START P0_SIZE
+
+/* largest erase size supported by the controller */
+#define SIZE_32KB (32 * 1024)
+#define MASK_32KB (SIZE_32KB - 1)
+
+/* controller page size, in bytes */
+#define EP_PAGE_SIZE 256
+#define EEP_PAGE_MASK (EP_PAGE_SIZE - 1)
+
+/* controller commands */
+#define CMD_SHIFT 24
+#define CMD_NOP (0)
+#define CMD_PAGE_PROGRAM(addr) ((0x02 << CMD_SHIFT) | addr)
+#define CMD_READ_DATA(addr) ((0x03 << CMD_SHIFT) | addr)
+#define CMD_READ_SR1 ((0x05 << CMD_SHIFT))
+#define CMD_WRITE_ENABLE ((0x06 << CMD_SHIFT))
+#define CMD_SECTOR_ERASE_32KB(addr) ((0x52 << CMD_SHIFT) | addr)
+#define CMD_CHIP_ERASE ((0x60 << CMD_SHIFT))
+#define CMD_READ_MANUF_DEV_ID ((0x90 << CMD_SHIFT))
+#define CMD_RELEASE_POWERDOWN_NOID ((0xab << CMD_SHIFT))
+
+/* controller interface speeds */
+#define EP_SPEED_FULL 0x2 /* full speed */
+
+/* controller status register 1 bits */
+#define SR1_BUSY 0x1ull /* the BUSY bit in SR1 */
+
+/* sleep length while waiting for controller */
+#define WAIT_SLEEP_US 100 /* must be larger than 5 (see usage) */
+#define COUNT_DELAY_SEC(n) ((n) * (1000000/WAIT_SLEEP_US))
+
+/* GPIO pins */
+#define EPROM_WP_N (1ull << 14) /* EPROM write line */
+
+/*
+ * Use the EP mutex to guard against other callers from within the driver.
+ * Also covers usage of eprom_available.
+ */
+static DEFINE_MUTEX(eprom_mutex);
+static int eprom_available; /* default: not available */
+
+/*
+ * Turn on external enable line that allows writing on the flash.
+ */
+static void write_enable(struct hfi1_devdata *dd)
+{
+ /* raise signal */
+ write_csr(dd, ASIC_GPIO_OUT,
+ read_csr(dd, ASIC_GPIO_OUT) | EPROM_WP_N);
+ /* raise enable */
+ write_csr(dd, ASIC_GPIO_OE,
+ read_csr(dd, ASIC_GPIO_OE) | EPROM_WP_N);
+}
+
+/*
+ * Turn off external enable line that allows writing on the flash.
+ */
+static void write_disable(struct hfi1_devdata *dd)
+{
+ /* lower signal */
+ write_csr(dd, ASIC_GPIO_OUT,
+ read_csr(dd, ASIC_GPIO_OUT) & ~EPROM_WP_N);
+ /* lower enable */
+ write_csr(dd, ASIC_GPIO_OE,
+ read_csr(dd, ASIC_GPIO_OE) & ~EPROM_WP_N);
+}
+
+/*
+ * Wait for the device to become not busy. Must be called after all
+ * write or erase operations.
+ */
+static int wait_for_not_busy(struct hfi1_devdata *dd)
+{
+ unsigned long count = 0;
+ u64 reg;
+ int ret = 0;
+
+ /* starts page mode */
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_READ_SR1);
+ while (1) {
+ udelay(WAIT_SLEEP_US);
+ usleep_range(WAIT_SLEEP_US - 5, WAIT_SLEEP_US + 5);
+ count++;
+ reg = read_csr(dd, ASIC_EEP_DATA);
+ if ((reg & SR1_BUSY) == 0)
+ break;
+ /* 200s is the largest time for a 128Mb device */
+ if (count > COUNT_DELAY_SEC(200)) {
+ dd_dev_err(dd, "waited too long for SPI FLASH busy to clear - failing\n");
+ ret = -ETIMEDOUT;
+ break; /* break, not goto - must stop page mode */
+ }
+ }
+
+ /* stop page mode with a NOP */
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_NOP);
+
+ return ret;
+}
+
+/*
+ * Read the device ID from the SPI controller.
+ */
+static u32 read_device_id(struct hfi1_devdata *dd)
+{
+ /* read the Manufacture Device ID */
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_READ_MANUF_DEV_ID);
+ return (u32)read_csr(dd, ASIC_EEP_DATA);
+}
+
+/*
+ * Erase the whole flash.
+ */
+static int erase_chip(struct hfi1_devdata *dd)
+{
+ int ret;
+
+ write_enable(dd);
+
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_WRITE_ENABLE);
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_CHIP_ERASE);
+ ret = wait_for_not_busy(dd);
+
+ write_disable(dd);
+
+ return ret;
+}
+
+/*
+ * Erase a range using the 32KB erase command.
+ */
+static int erase_32kb_range(struct hfi1_devdata *dd, u32 start, u32 end)
+{
+ int ret = 0;
+
+ if (end < start)
+ return -EINVAL;
+
+ if ((start & MASK_32KB) || (end & MASK_32KB)) {
+ dd_dev_err(dd,
+ "%s: non-aligned range (0x%x,0x%x) for a 32KB erase\n",
+ __func__, start, end);
+ return -EINVAL;
+ }
+
+ write_enable(dd);
+
+ for (; start < end; start += SIZE_32KB) {
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_WRITE_ENABLE);
+ write_csr(dd, ASIC_EEP_ADDR_CMD,
+ CMD_SECTOR_ERASE_32KB(start));
+ ret = wait_for_not_busy(dd);
+ if (ret)
+ goto done;
+ }
+
+done:
+ write_disable(dd);
+
+ return ret;
+}
+
+/*
+ * Read a 256 byte (64 dword) EPROM page.
+ * All callers have verified the offset is at a page boundary.
+ */
+static void read_page(struct hfi1_devdata *dd, u32 offset, u32 *result)
+{
+ int i;
+
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_READ_DATA(offset));
+ for (i = 0; i < EP_PAGE_SIZE/sizeof(u32); i++)
+ result[i] = (u32)read_csr(dd, ASIC_EEP_DATA);
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_NOP); /* close open page */
+}
+
+/*
+ * Read length bytes starting at offset. Copy to user address addr.
+ */
+static int read_length(struct hfi1_devdata *dd, u32 start, u32 len, u64 addr)
+{
+ u32 offset;
+ u32 buffer[EP_PAGE_SIZE/sizeof(u32)];
+ int ret = 0;
+
+ /* reject anything not on an EPROM page boundary */
+ if ((start & EEP_PAGE_MASK) || (len & EEP_PAGE_MASK))
+ return -EINVAL;
+
+ for (offset = 0; offset < len; offset += EP_PAGE_SIZE) {
+ read_page(dd, start + offset, buffer);
+ if (copy_to_user((void __user *)(addr + offset),
+ buffer, EP_PAGE_SIZE)) {
+ ret = -EFAULT;
+ goto done;
+ }
+ }
+
+done:
+ return ret;
+}
+
+/*
+ * Write a 256 byte (64 dword) EPROM page.
+ * All callers have verified the offset is at a page boundary.
+ */
+static int write_page(struct hfi1_devdata *dd, u32 offset, u32 *data)
+{
+ int i;
+
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_WRITE_ENABLE);
+ write_csr(dd, ASIC_EEP_DATA, data[0]);
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_PAGE_PROGRAM(offset));
+ for (i = 1; i < EP_PAGE_SIZE/sizeof(u32); i++)
+ write_csr(dd, ASIC_EEP_DATA, data[i]);
+ /* will close the open page */
+ return wait_for_not_busy(dd);
+}
+
+/*
+ * Write length bytes starting at offset. Read from user address addr.
+ */
+static int write_length(struct hfi1_devdata *dd, u32 start, u32 len, u64 addr)
+{
+ u32 offset;
+ u32 buffer[EP_PAGE_SIZE/sizeof(u32)];
+ int ret = 0;
+
+ /* reject anything not on an EPROM page boundary */
+ if ((start & EEP_PAGE_MASK) || (len & EEP_PAGE_MASK))
+ return -EINVAL;
+
+ write_enable(dd);
+
+ for (offset = 0; offset < len; offset += EP_PAGE_SIZE) {
+ if (copy_from_user(buffer, (void __user *)(addr + offset),
+ EP_PAGE_SIZE)) {
+ ret = -EFAULT;
+ goto done;
+ }
+ ret = write_page(dd, start + offset, buffer);
+ if (ret)
+ goto done;
+ }
+
+done:
+ write_disable(dd);
+ return ret;
+}
+
+/*
+ * Perform the given operation on the EPROM. Called from user space. The
+ * user credentials have already been checked.
+ *
+ * Return 0 on success, -ERRNO on error
+ */
+int handle_eprom_command(const struct hfi1_cmd *cmd)
+{
+ struct hfi1_devdata *dd;
+ u32 dev_id;
+ int ret = 0;
+
+ /*
+ * The EPROM is per-device, so use unit 0 as that will always
+ * exist.
+ */
+ dd = hfi1_lookup(0);
+ if (!dd) {
+ pr_err("%s: cannot find unit 0!\n", __func__);
+ return -EINVAL;
+ }
+
+ /* lock against other callers touching the ASIC block */
+ mutex_lock(&eprom_mutex);
+
+ /* some platforms do not have an EPROM */
+ if (!eprom_available) {
+ ret = -ENOSYS;
+ goto done_asic;
+ }
+
+ /* lock against the other HFI on another OS */
+ ret = acquire_hw_mutex(dd);
+ if (ret) {
+ dd_dev_err(dd,
+ "%s: unable to acquire hw mutex, no EPROM support\n",
+ __func__);
+ goto done_asic;
+ }
+
+ dd_dev_info(dd, "%s: cmd: type %d, len 0x%x, addr 0x%016llx\n",
+ __func__, cmd->type, cmd->len, cmd->addr);
+
+ switch (cmd->type) {
+ case HFI1_CMD_EP_INFO:
+ if (cmd->len != sizeof(u32)) {
+ ret = -ERANGE;
+ break;
+ }
+ dev_id = read_device_id(dd);
+ /* addr points to a u32 user buffer */
+ if (copy_to_user((void __user *)cmd->addr, &dev_id,
+ sizeof(u32)))
+ ret = -EFAULT;
+ break;
+ case HFI1_CMD_EP_ERASE_CHIP:
+ ret = erase_chip(dd);
+ break;
+ case HFI1_CMD_EP_ERASE_P0:
+ if (cmd->len != P0_SIZE) {
+ ret = -ERANGE;
+ break;
+ }
+ ret = erase_32kb_range(dd, 0, cmd->len);
+ break;
+ case HFI1_CMD_EP_ERASE_P1:
+ /* check for overflow */
+ if (P1_START + cmd->len > ASIC_EEP_ADDR_CMD_EP_ADDR_MASK) {
+ ret = -ERANGE;
+ break;
+ }
+ ret = erase_32kb_range(dd, P1_START, P1_START + cmd->len);
+ break;
+ case HFI1_CMD_EP_READ_P0:
+ if (cmd->len != P0_SIZE) {
+ ret = -ERANGE;
+ break;
+ }
+ ret = read_length(dd, 0, cmd->len, cmd->addr);
+ break;
+ case HFI1_CMD_EP_READ_P1:
+ /* check for overflow */
+ if (P1_START + cmd->len > ASIC_EEP_ADDR_CMD_EP_ADDR_MASK) {
+ ret = -ERANGE;
+ break;
+ }
+ ret = read_length(dd, P1_START, cmd->len, cmd->addr);
+ break;
+ case HFI1_CMD_EP_WRITE_P0:
+ if (cmd->len > P0_SIZE) {
+ ret = -ERANGE;
+ break;
+ }
+ ret = write_length(dd, 0, cmd->len, cmd->addr);
+ break;
+ case HFI1_CMD_EP_WRITE_P1:
+ /* check for overflow */
+ if (P1_START + cmd->len > ASIC_EEP_ADDR_CMD_EP_ADDR_MASK) {
+ ret = -ERANGE;
+ break;
+ }
+ ret = write_length(dd, P1_START, cmd->len, cmd->addr);
+ break;
+ default:
+ dd_dev_err(dd, "%s: unexpected command %d\n",
+ __func__, cmd->type);
+ ret = -EINVAL;
+ break;
+ }
+
+ release_hw_mutex(dd);
+done_asic:
+ mutex_unlock(&eprom_mutex);
+ return ret;
+}
+
+/*
+ * Initialize the EPROM handler.
+ */
+int eprom_init(struct hfi1_devdata *dd)
+{
+ int ret = 0;
+
+ /* only the discrete chip has an EPROM, nothing to do */
+ if (dd->pcidev->device != PCI_DEVICE_ID_INTEL0)
+ return 0;
+
+ /* lock against other callers */
+ mutex_lock(&eprom_mutex);
+ if (eprom_available) /* already initialized */
+ goto done_asic;
+
+ /*
+ * Lock against the other HFI on another OS - the mutex above
+ * would have caught anything in this driver. It is OK if
+ * both OSes reset the EPROM - as long as they don't do it at
+ * the same time.
+ */
+ ret = acquire_hw_mutex(dd);
+ if (ret) {
+ dd_dev_err(dd,
+ "%s: unable to acquire hw mutex, no EPROM support\n",
+ __func__);
+ goto done_asic;
+ }
+
+ /* reset EPROM to be sure it is in a good state */
+
+ /* set reset */
+ write_csr(dd, ASIC_EEP_CTL_STAT,
+ ASIC_EEP_CTL_STAT_EP_RESET_SMASK);
+ /* clear reset, set speed */
+ write_csr(dd, ASIC_EEP_CTL_STAT,
+ EP_SPEED_FULL << ASIC_EEP_CTL_STAT_RATE_SPI_SHIFT);
+
+ /* wake the device with command "release powerdown NoID" */
+ write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_RELEASE_POWERDOWN_NOID);
+
+ eprom_available = 1;
+ release_hw_mutex(dd);
+done_asic:
+ mutex_unlock(&eprom_mutex);
+ return ret;
+}
diff --git a/drivers/staging/rdma/hfi1/eprom.h b/drivers/staging/rdma/hfi1/eprom.h
new file mode 100644
index 0000000..64a6427
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/eprom.h
@@ -0,0 +1,55 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+struct hfi1_cmd;
+struct hfi1_devdata;
+
+int eprom_init(struct hfi1_devdata *dd);
+int handle_eprom_command(const struct hfi1_cmd *cmd);
diff --git a/drivers/staging/rdma/hfi1/file_ops.c b/drivers/staging/rdma/hfi1/file_ops.c
new file mode 100644
index 0000000..4698617
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/file_ops.c
@@ -0,0 +1,2140 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <linux/pci.h>
+#include <linux/poll.h>
+#include <linux/cdev.h>
+#include <linux/swap.h>
+#include <linux/vmalloc.h>
+#include <linux/highmem.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <asm/pgtable.h>
+#include <linux/delay.h>
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/cred.h>
+#include <linux/uio.h>
+
+#include "hfi.h"
+#include "pio.h"
+#include "device.h"
+#include "common.h"
+#include "trace.h"
+#include "user_sdma.h"
+#include "eprom.h"
+
+#undef pr_fmt
+#define pr_fmt(fmt) DRIVER_NAME ": " fmt
+
+#define SEND_CTXT_HALT_TIMEOUT 1000 /* msecs */
+
+/*
+ * File operation functions
+ */
+static int hfi1_file_open(struct inode *, struct file *);
+static int hfi1_file_close(struct inode *, struct file *);
+static ssize_t hfi1_file_write(struct file *, const char __user *,
+ size_t, loff_t *);
+static ssize_t hfi1_write_iter(struct kiocb *, struct iov_iter *);
+static unsigned int hfi1_poll(struct file *, struct poll_table_struct *);
+static int hfi1_file_mmap(struct file *, struct vm_area_struct *);
+
+static u64 kvirt_to_phys(void *);
+static int assign_ctxt(struct file *, struct hfi1_user_info *);
+static int init_subctxts(struct hfi1_ctxtdata *, const struct hfi1_user_info *);
+static int user_init(struct file *);
+static int get_ctxt_info(struct file *, void __user *, __u32);
+static int get_base_info(struct file *, void __user *, __u32);
+static int setup_ctxt(struct file *);
+static int setup_subctxt(struct hfi1_ctxtdata *);
+static int get_user_context(struct file *, struct hfi1_user_info *,
+ int, unsigned);
+static int find_shared_ctxt(struct file *, const struct hfi1_user_info *);
+static int allocate_ctxt(struct file *, struct hfi1_devdata *,
+ struct hfi1_user_info *);
+static unsigned int poll_urgent(struct file *, struct poll_table_struct *);
+static unsigned int poll_next(struct file *, struct poll_table_struct *);
+static int user_event_ack(struct hfi1_ctxtdata *, int, unsigned long);
+static int set_ctxt_pkey(struct hfi1_ctxtdata *, unsigned, u16);
+static int manage_rcvq(struct hfi1_ctxtdata *, unsigned, int);
+static int vma_fault(struct vm_area_struct *, struct vm_fault *);
+static int exp_tid_setup(struct file *, struct hfi1_tid_info *);
+static int exp_tid_free(struct file *, struct hfi1_tid_info *);
+static void unlock_exp_tids(struct hfi1_ctxtdata *);
+
+static const struct file_operations hfi1_file_ops = {
+ .owner = THIS_MODULE,
+ .write = hfi1_file_write,
+ .write_iter = hfi1_write_iter,
+ .open = hfi1_file_open,
+ .release = hfi1_file_close,
+ .poll = hfi1_poll,
+ .mmap = hfi1_file_mmap,
+ .llseek = noop_llseek,
+};
+
+static struct vm_operations_struct vm_ops = {
+ .fault = vma_fault,
+};
+
+/*
+ * Types of memories mapped into user processes' space
+ */
+enum mmap_types {
+ PIO_BUFS = 1,
+ PIO_BUFS_SOP,
+ PIO_CRED,
+ RCV_HDRQ,
+ RCV_EGRBUF,
+ UREGS,
+ EVENTS,
+ STATUS,
+ RTAIL,
+ SUBCTXT_UREGS,
+ SUBCTXT_RCV_HDRQ,
+ SUBCTXT_EGRBUF,
+ SDMA_COMP
+};
+
+/*
+ * Masks and offsets defining the mmap tokens
+ */
+#define HFI1_MMAP_OFFSET_MASK 0xfffULL
+#define HFI1_MMAP_OFFSET_SHIFT 0
+#define HFI1_MMAP_SUBCTXT_MASK 0xfULL
+#define HFI1_MMAP_SUBCTXT_SHIFT 12
+#define HFI1_MMAP_CTXT_MASK 0xffULL
+#define HFI1_MMAP_CTXT_SHIFT 16
+#define HFI1_MMAP_TYPE_MASK 0xfULL
+#define HFI1_MMAP_TYPE_SHIFT 24
+#define HFI1_MMAP_MAGIC_MASK 0xffffffffULL
+#define HFI1_MMAP_MAGIC_SHIFT 32
+
+#define HFI1_MMAP_MAGIC 0xdabbad00
+
+#define HFI1_MMAP_TOKEN_SET(field, val) \
+ (((val) & HFI1_MMAP_##field##_MASK) << HFI1_MMAP_##field##_SHIFT)
+#define HFI1_MMAP_TOKEN_GET(field, token) \
+ (((token) >> HFI1_MMAP_##field##_SHIFT) & HFI1_MMAP_##field##_MASK)
+#define HFI1_MMAP_TOKEN(type, ctxt, subctxt, addr) \
+ (HFI1_MMAP_TOKEN_SET(MAGIC, HFI1_MMAP_MAGIC) | \
+ HFI1_MMAP_TOKEN_SET(TYPE, type) | \
+ HFI1_MMAP_TOKEN_SET(CTXT, ctxt) | \
+ HFI1_MMAP_TOKEN_SET(SUBCTXT, subctxt) | \
+ HFI1_MMAP_TOKEN_SET(OFFSET, ((unsigned long)addr & ~PAGE_MASK)))
+
+#define EXP_TID_SET(field, value) \
+ (((value) & EXP_TID_TID##field##_MASK) << \
+ EXP_TID_TID##field##_SHIFT)
+#define EXP_TID_CLEAR(tid, field) { \
+ (tid) &= ~(EXP_TID_TID##field##_MASK << \
+ EXP_TID_TID##field##_SHIFT); \
+ }
+#define EXP_TID_RESET(tid, field, value) do { \
+ EXP_TID_CLEAR(tid, field); \
+ (tid) |= EXP_TID_SET(field, value); \
+ } while (0)
+
+#define dbg(fmt, ...) \
+ pr_info(fmt, ##__VA_ARGS__)
+
+
+static inline int is_valid_mmap(u64 token)
+{
+ return (HFI1_MMAP_TOKEN_GET(MAGIC, token) == HFI1_MMAP_MAGIC);
+}
+
+static int hfi1_file_open(struct inode *inode, struct file *fp)
+{
+ /* The real work is performed later in assign_ctxt() */
+ fp->private_data = kzalloc(sizeof(struct hfi1_filedata), GFP_KERNEL);
+ if (fp->private_data) /* no cpu affinity by default */
+ ((struct hfi1_filedata *)fp->private_data)->rec_cpu_num = -1;
+ return fp->private_data ? 0 : -ENOMEM;
+}
+
+static ssize_t hfi1_file_write(struct file *fp, const char __user *data,
+ size_t count, loff_t *offset)
+{
+ const struct hfi1_cmd __user *ucmd;
+ struct hfi1_ctxtdata *uctxt = ctxt_fp(fp);
+ struct hfi1_cmd cmd;
+ struct hfi1_user_info uinfo;
+ struct hfi1_tid_info tinfo;
+ ssize_t consumed = 0, copy = 0, ret = 0;
+ void *dest = NULL;
+ __u64 user_val = 0;
+ int uctxt_required = 1;
+ int must_be_root = 0;
+
+ if (count < sizeof(cmd)) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ ucmd = (const struct hfi1_cmd __user *)data;
+ if (copy_from_user(&cmd, ucmd, sizeof(cmd))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ consumed = sizeof(cmd);
+
+ switch (cmd.type) {
+ case HFI1_CMD_ASSIGN_CTXT:
+ uctxt_required = 0; /* assigned user context not required */
+ copy = sizeof(uinfo);
+ dest = &uinfo;
+ break;
+ case HFI1_CMD_SDMA_STATUS_UPD:
+ case HFI1_CMD_CREDIT_UPD:
+ copy = 0;
+ break;
+ case HFI1_CMD_TID_UPDATE:
+ case HFI1_CMD_TID_FREE:
+ copy = sizeof(tinfo);
+ dest = &tinfo;
+ break;
+ case HFI1_CMD_USER_INFO:
+ case HFI1_CMD_RECV_CTRL:
+ case HFI1_CMD_POLL_TYPE:
+ case HFI1_CMD_ACK_EVENT:
+ case HFI1_CMD_CTXT_INFO:
+ case HFI1_CMD_SET_PKEY:
+ case HFI1_CMD_CTXT_RESET:
+ copy = 0;
+ user_val = cmd.addr;
+ break;
+ case HFI1_CMD_EP_INFO:
+ case HFI1_CMD_EP_ERASE_CHIP:
+ case HFI1_CMD_EP_ERASE_P0:
+ case HFI1_CMD_EP_ERASE_P1:
+ case HFI1_CMD_EP_READ_P0:
+ case HFI1_CMD_EP_READ_P1:
+ case HFI1_CMD_EP_WRITE_P0:
+ case HFI1_CMD_EP_WRITE_P1:
+ uctxt_required = 0; /* assigned user context not required */
+ must_be_root = 1; /* validate user */
+ copy = 0;
+ break;
+ default:
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ /* If the command comes with user data, copy it. */
+ if (copy) {
+ if (copy_from_user(dest, (void __user *)cmd.addr, copy)) {
+ ret = -EFAULT;
+ goto bail;
+ }
+ consumed += copy;
+ }
+
+ /*
+ * Make sure there is a uctxt when needed.
+ */
+ if (uctxt_required && !uctxt) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ /* only root can do these operations */
+ if (must_be_root && !capable(CAP_SYS_ADMIN)) {
+ ret = -EPERM;
+ goto bail;
+ }
+
+ switch (cmd.type) {
+ case HFI1_CMD_ASSIGN_CTXT:
+ ret = assign_ctxt(fp, &uinfo);
+ if (ret < 0)
+ goto bail;
+ ret = setup_ctxt(fp);
+ if (ret)
+ goto bail;
+ ret = user_init(fp);
+ break;
+ case HFI1_CMD_CTXT_INFO:
+ ret = get_ctxt_info(fp, (void __user *)(unsigned long)
+ user_val, cmd.len);
+ break;
+ case HFI1_CMD_USER_INFO:
+ ret = get_base_info(fp, (void __user *)(unsigned long)
+ user_val, cmd.len);
+ break;
+ case HFI1_CMD_SDMA_STATUS_UPD:
+ break;
+ case HFI1_CMD_CREDIT_UPD:
+ if (uctxt && uctxt->sc)
+ sc_return_credits(uctxt->sc);
+ break;
+ case HFI1_CMD_TID_UPDATE:
+ ret = exp_tid_setup(fp, &tinfo);
+ if (!ret) {
+ unsigned long addr;
+ /*
+ * Copy the number of tidlist entries we used
+ * and the length of the buffer we registered.
+ * These fields are adjacent in the structure so
+ * we can copy them at the same time.
+ */
+ addr = (unsigned long)cmd.addr +
+ offsetof(struct hfi1_tid_info, tidcnt);
+ if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
+ sizeof(tinfo.tidcnt) +
+ sizeof(tinfo.length)))
+ ret = -EFAULT;
+ }
+ break;
+ case HFI1_CMD_TID_FREE:
+ ret = exp_tid_free(fp, &tinfo);
+ break;
+ case HFI1_CMD_RECV_CTRL:
+ ret = manage_rcvq(uctxt, subctxt_fp(fp), (int)user_val);
+ break;
+ case HFI1_CMD_POLL_TYPE:
+ uctxt->poll_type = (typeof(uctxt->poll_type))user_val;
+ break;
+ case HFI1_CMD_ACK_EVENT:
+ ret = user_event_ack(uctxt, subctxt_fp(fp), user_val);
+ break;
+ case HFI1_CMD_SET_PKEY:
+ if (HFI1_CAP_IS_USET(PKEY_CHECK))
+ ret = set_ctxt_pkey(uctxt, subctxt_fp(fp), user_val);
+ else
+ ret = -EPERM;
+ break;
+ case HFI1_CMD_CTXT_RESET: {
+ struct send_context *sc;
+ struct hfi1_devdata *dd;
+
+ if (!uctxt || !uctxt->dd || !uctxt->sc) {
+ ret = -EINVAL;
+ break;
+ }
+ /*
+ * There is no protection here. User level has to
+ * guarantee that no one will be writing to the send
+ * context while it is being re-initialized.
+ * If user level breaks that guarantee, it will break
+ * it's own context and no one else's.
+ */
+ dd = uctxt->dd;
+ sc = uctxt->sc;
+ /*
+ * Wait until the interrupt handler has marked the
+ * context as halted or frozen. Report error if we time
+ * out.
+ */
+ wait_event_interruptible_timeout(
+ sc->halt_wait, (sc->flags & SCF_HALTED),
+ msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT));
+ if (!(sc->flags & SCF_HALTED)) {
+ ret = -ENOLCK;
+ break;
+ }
+ /*
+ * If the send context was halted due to a Freeze,
+ * wait until the device has been "unfrozen" before
+ * resetting the context.
+ */
+ if (sc->flags & SCF_FROZEN) {
+ wait_event_interruptible_timeout(
+ dd->event_queue,
+ !(ACCESS_ONCE(dd->flags) & HFI1_FROZEN),
+ msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT));
+ if (dd->flags & HFI1_FROZEN) {
+ ret = -ENOLCK;
+ break;
+ }
+ if (dd->flags & HFI1_FORCED_FREEZE) {
+ /* Don't allow context reset if we are into
+ * forced freeze */
+ ret = -ENODEV;
+ break;
+ }
+ sc_disable(sc);
+ ret = sc_enable(sc);
+ hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_ENB,
+ uctxt->ctxt);
+ } else
+ ret = sc_restart(sc);
+ if (!ret)
+ sc_return_credits(sc);
+ break;
+ }
+ case HFI1_CMD_EP_INFO:
+ case HFI1_CMD_EP_ERASE_CHIP:
+ case HFI1_CMD_EP_ERASE_P0:
+ case HFI1_CMD_EP_ERASE_P1:
+ case HFI1_CMD_EP_READ_P0:
+ case HFI1_CMD_EP_READ_P1:
+ case HFI1_CMD_EP_WRITE_P0:
+ case HFI1_CMD_EP_WRITE_P1:
+ ret = handle_eprom_command(&cmd);
+ break;
+ }
+
+ if (ret >= 0)
+ ret = consumed;
+bail:
+ return ret;
+}
+
+static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from)
+{
+ struct hfi1_user_sdma_pkt_q *pq;
+ struct hfi1_user_sdma_comp_q *cq;
+ int ret = 0, done = 0, reqs = 0;
+ unsigned long dim = from->nr_segs;
+
+ if (!user_sdma_comp_fp(kiocb->ki_filp) ||
+ !user_sdma_pkt_fp(kiocb->ki_filp)) {
+ ret = -EIO;
+ goto done;
+ }
+
+ if (!iter_is_iovec(from) || !dim) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ hfi1_cdbg(SDMA, "SDMA request from %u:%u (%lu)",
+ ctxt_fp(kiocb->ki_filp)->ctxt, subctxt_fp(kiocb->ki_filp),
+ dim);
+ pq = user_sdma_pkt_fp(kiocb->ki_filp);
+ cq = user_sdma_comp_fp(kiocb->ki_filp);
+
+ if (atomic_read(&pq->n_reqs) == pq->n_max_reqs) {
+ ret = -ENOSPC;
+ goto done;
+ }
+
+ while (dim) {
+ unsigned long count = 0;
+
+ ret = hfi1_user_sdma_process_request(
+ kiocb->ki_filp, (struct iovec *)(from->iov + done),
+ dim, &count);
+ if (ret)
+ goto done;
+ dim -= count;
+ done += count;
+ reqs++;
+ }
+done:
+ return ret ? ret : reqs;
+}
+
+static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma)
+{
+ struct hfi1_ctxtdata *uctxt;
+ struct hfi1_devdata *dd;
+ unsigned long flags, pfn;
+ u64 token = vma->vm_pgoff << PAGE_SHIFT,
+ memaddr = 0;
+ u8 subctxt, mapio = 0, vmf = 0, type;
+ ssize_t memlen = 0;
+ int ret = 0;
+ u16 ctxt;
+
+ uctxt = ctxt_fp(fp);
+ if (!is_valid_mmap(token) || !uctxt ||
+ !(vma->vm_flags & VM_SHARED)) {
+ ret = -EINVAL;
+ goto done;
+ }
+ dd = uctxt->dd;
+ ctxt = HFI1_MMAP_TOKEN_GET(CTXT, token);
+ subctxt = HFI1_MMAP_TOKEN_GET(SUBCTXT, token);
+ type = HFI1_MMAP_TOKEN_GET(TYPE, token);
+ if (ctxt != uctxt->ctxt || subctxt != subctxt_fp(fp)) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ flags = vma->vm_flags;
+
+ switch (type) {
+ case PIO_BUFS:
+ case PIO_BUFS_SOP:
+ memaddr = ((dd->physaddr + TXE_PIO_SEND) +
+ /* chip pio base */
+ (uctxt->sc->hw_context * (1 << 16))) +
+ /* 64K PIO space / ctxt */
+ (type == PIO_BUFS_SOP ?
+ (TXE_PIO_SIZE / 2) : 0); /* sop? */
+ /*
+ * Map only the amount allocated to the context, not the
+ * entire available context's PIO space.
+ */
+ memlen = ALIGN(uctxt->sc->credits * PIO_BLOCK_SIZE,
+ PAGE_SIZE);
+ flags &= ~VM_MAYREAD;
+ flags |= VM_DONTCOPY | VM_DONTEXPAND;
+ vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+ mapio = 1;
+ break;
+ case PIO_CRED:
+ if (flags & VM_WRITE) {
+ ret = -EPERM;
+ goto done;
+ }
+ /*
+ * The credit return location for this context could be on the
+ * second or third page allocated for credit returns (if number
+ * of enabled contexts > 64 and 128 respectively).
+ */
+ memaddr = dd->cr_base[uctxt->numa_id].pa +
+ (((u64)uctxt->sc->hw_free -
+ (u64)dd->cr_base[uctxt->numa_id].va) & PAGE_MASK);
+ memlen = PAGE_SIZE;
+ flags &= ~VM_MAYWRITE;
+ flags |= VM_DONTCOPY | VM_DONTEXPAND;
+ /*
+ * The driver has already allocated memory for credit
+ * returns and programmed it into the chip. Has that
+ * memory been flagged as non-cached?
+ */
+ /* vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); */
+ mapio = 1;
+ break;
+ case RCV_HDRQ:
+ memaddr = uctxt->rcvhdrq_phys;
+ memlen = uctxt->rcvhdrq_size;
+ break;
+ case RCV_EGRBUF: {
+ unsigned long addr;
+ int i;
+ /*
+ * The RcvEgr buffer need to be handled differently
+ * as multiple non-contiguous pages need to be mapped
+ * into the user process.
+ */
+ memlen = uctxt->egrbufs.size;
+ if ((vma->vm_end - vma->vm_start) != memlen) {
+ dd_dev_err(dd, "Eager buffer map size invalid (%lu != %lu)\n",
+ (vma->vm_end - vma->vm_start), memlen);
+ ret = -EINVAL;
+ goto done;
+ }
+ if (vma->vm_flags & VM_WRITE) {
+ ret = -EPERM;
+ goto done;
+ }
+ vma->vm_flags &= ~VM_MAYWRITE;
+ addr = vma->vm_start;
+ for (i = 0 ; i < uctxt->egrbufs.numbufs; i++) {
+ ret = remap_pfn_range(
+ vma, addr,
+ uctxt->egrbufs.buffers[i].phys >> PAGE_SHIFT,
+ uctxt->egrbufs.buffers[i].len,
+ vma->vm_page_prot);
+ if (ret < 0)
+ goto done;
+ addr += uctxt->egrbufs.buffers[i].len;
+ }
+ ret = 0;
+ goto done;
+ }
+ case UREGS:
+ /*
+ * Map only the page that contains this context's user
+ * registers.
+ */
+ memaddr = (unsigned long)
+ (dd->physaddr + RXE_PER_CONTEXT_USER)
+ + (uctxt->ctxt * RXE_PER_CONTEXT_SIZE);
+ /*
+ * TidFlow table is on the same page as the rest of the
+ * user registers.
+ */
+ memlen = PAGE_SIZE;
+ flags |= VM_DONTCOPY | VM_DONTEXPAND;
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ mapio = 1;
+ break;
+ case EVENTS:
+ /*
+ * Use the page where this context's flags are. User level
+ * knows where it's own bitmap is within the page.
+ */
+ memaddr = ((unsigned long)dd->events +
+ ((uctxt->ctxt - dd->first_user_ctxt) *
+ HFI1_MAX_SHARED_CTXTS)) & PAGE_MASK;
+ memlen = PAGE_SIZE;
+ /*
+ * v3.7 removes VM_RESERVED but the effect is kept by
+ * using VM_IO.
+ */
+ flags |= VM_IO | VM_DONTEXPAND;
+ vmf = 1;
+ break;
+ case STATUS:
+ memaddr = kvirt_to_phys((void *)dd->status);
+ memlen = PAGE_SIZE;
+ flags |= VM_IO | VM_DONTEXPAND;
+ break;
+ case RTAIL:
+ if (!HFI1_CAP_IS_USET(DMA_RTAIL)) {
+ /*
+ * If the memory allocation failed, the context alloc
+ * also would have failed, so we would never get here
+ */
+ ret = -EINVAL;
+ goto done;
+ }
+ if (flags & VM_WRITE) {
+ ret = -EPERM;
+ goto done;
+ }
+ memaddr = uctxt->rcvhdrqtailaddr_phys;
+ memlen = PAGE_SIZE;
+ flags &= ~VM_MAYWRITE;
+ break;
+ case SUBCTXT_UREGS:
+ memaddr = (u64)uctxt->subctxt_uregbase;
+ memlen = PAGE_SIZE;
+ flags |= VM_IO | VM_DONTEXPAND;
+ vmf = 1;
+ break;
+ case SUBCTXT_RCV_HDRQ:
+ memaddr = (u64)uctxt->subctxt_rcvhdr_base;
+ memlen = uctxt->rcvhdrq_size * uctxt->subctxt_cnt;
+ flags |= VM_IO | VM_DONTEXPAND;
+ vmf = 1;
+ break;
+ case SUBCTXT_EGRBUF:
+ memaddr = (u64)uctxt->subctxt_rcvegrbuf;
+ memlen = uctxt->egrbufs.size * uctxt->subctxt_cnt;
+ flags |= VM_IO | VM_DONTEXPAND;
+ flags &= ~VM_MAYWRITE;
+ vmf = 1;
+ break;
+ case SDMA_COMP: {
+ struct hfi1_user_sdma_comp_q *cq;
+
+ if (!user_sdma_comp_fp(fp)) {
+ ret = -EFAULT;
+ goto done;
+ }
+ cq = user_sdma_comp_fp(fp);
+ memaddr = (u64)cq->comps;
+ memlen = ALIGN(sizeof(*cq->comps) * cq->nentries, PAGE_SIZE);
+ flags |= VM_IO | VM_DONTEXPAND;
+ vmf = 1;
+ break;
+ }
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ if ((vma->vm_end - vma->vm_start) != memlen) {
+ hfi1_cdbg(PROC, "%u:%u Memory size mismatch %lu:%lu",
+ uctxt->ctxt, subctxt_fp(fp),
+ (vma->vm_end - vma->vm_start), memlen);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ vma->vm_flags = flags;
+ dd_dev_info(dd,
+ "%s: %u:%u type:%u io/vf:%d/%d, addr:0x%llx, len:%lu(%lu), flags:0x%lx\n",
+ __func__, ctxt, subctxt, type, mapio, vmf, memaddr, memlen,
+ vma->vm_end - vma->vm_start, vma->vm_flags);
+ pfn = (unsigned long)(memaddr >> PAGE_SHIFT);
+ if (vmf) {
+ vma->vm_pgoff = pfn;
+ vma->vm_ops = &vm_ops;
+ ret = 0;
+ } else if (mapio) {
+ ret = io_remap_pfn_range(vma, vma->vm_start, pfn, memlen,
+ vma->vm_page_prot);
+ } else {
+ ret = remap_pfn_range(vma, vma->vm_start, pfn, memlen,
+ vma->vm_page_prot);
+ }
+done:
+ return ret;
+}
+
+/*
+ * Local (non-chip) user memory is not mapped right away but as it is
+ * accessed by the user-level code.
+ */
+static int vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ struct page *page;
+
+ page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT));
+ if (!page)
+ return VM_FAULT_SIGBUS;
+
+ get_page(page);
+ vmf->page = page;
+
+ return 0;
+}
+
+static unsigned int hfi1_poll(struct file *fp, struct poll_table_struct *pt)
+{
+ struct hfi1_ctxtdata *uctxt;
+ unsigned pollflag;
+
+ uctxt = ctxt_fp(fp);
+ if (!uctxt)
+ pollflag = POLLERR;
+ else if (uctxt->poll_type == HFI1_POLL_TYPE_URGENT)
+ pollflag = poll_urgent(fp, pt);
+ else if (uctxt->poll_type == HFI1_POLL_TYPE_ANYRCV)
+ pollflag = poll_next(fp, pt);
+ else /* invalid */
+ pollflag = POLLERR;
+
+ return pollflag;
+}
+
+static int hfi1_file_close(struct inode *inode, struct file *fp)
+{
+ struct hfi1_filedata *fdata = fp->private_data;
+ struct hfi1_ctxtdata *uctxt = fdata->uctxt;
+ struct hfi1_devdata *dd;
+ unsigned long flags, *ev;
+
+ fp->private_data = NULL;
+
+ if (!uctxt)
+ goto done;
+
+ hfi1_cdbg(PROC, "freeing ctxt %u:%u", uctxt->ctxt, fdata->subctxt);
+ dd = uctxt->dd;
+ mutex_lock(&hfi1_mutex);
+
+ flush_wc();
+ /* drain user sdma queue */
+ if (fdata->pq)
+ hfi1_user_sdma_free_queues(fdata);
+
+ /*
+ * Clear any left over, unhandled events so the next process that
+ * gets this context doesn't get confused.
+ */
+ ev = dd->events + ((uctxt->ctxt - dd->first_user_ctxt) *
+ HFI1_MAX_SHARED_CTXTS) + fdata->subctxt;
+ *ev = 0;
+
+ if (--uctxt->cnt) {
+ uctxt->active_slaves &= ~(1 << fdata->subctxt);
+ uctxt->subpid[fdata->subctxt] = 0;
+ mutex_unlock(&hfi1_mutex);
+ goto done;
+ }
+
+ spin_lock_irqsave(&dd->uctxt_lock, flags);
+ /*
+ * Disable receive context and interrupt available, reset all
+ * RcvCtxtCtrl bits to default values.
+ */
+ hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS |
+ HFI1_RCVCTRL_TIDFLOW_DIS |
+ HFI1_RCVCTRL_INTRAVAIL_DIS |
+ HFI1_RCVCTRL_ONE_PKT_EGR_DIS |
+ HFI1_RCVCTRL_NO_RHQ_DROP_DIS |
+ HFI1_RCVCTRL_NO_EGR_DROP_DIS, uctxt->ctxt);
+ /* Clear the context's J_KEY */
+ hfi1_clear_ctxt_jkey(dd, uctxt->ctxt);
+ /*
+ * Reset context integrity checks to default.
+ * (writes to CSRs probably belong in chip.c)
+ */
+ write_kctxt_csr(dd, uctxt->sc->hw_context, SEND_CTXT_CHECK_ENABLE,
+ hfi1_pkt_default_send_ctxt_mask(dd, uctxt->sc->type));
+ sc_disable(uctxt->sc);
+ uctxt->pid = 0;
+ spin_unlock_irqrestore(&dd->uctxt_lock, flags);
+
+ dd->rcd[uctxt->ctxt] = NULL;
+ uctxt->rcvwait_to = 0;
+ uctxt->piowait_to = 0;
+ uctxt->rcvnowait = 0;
+ uctxt->pionowait = 0;
+ uctxt->event_flags = 0;
+
+ hfi1_clear_tids(uctxt);
+ hfi1_clear_ctxt_pkey(dd, uctxt->ctxt);
+
+ if (uctxt->tid_pg_list)
+ unlock_exp_tids(uctxt);
+
+ hfi1_stats.sps_ctxts--;
+ dd->freectxts++;
+ mutex_unlock(&hfi1_mutex);
+ hfi1_free_ctxtdata(dd, uctxt);
+done:
+ kfree(fdata);
+ return 0;
+}
+
+/*
+ * Convert kernel *virtual* addresses to physical addresses.
+ * This is used to vmalloc'ed addresses.
+ */
+static u64 kvirt_to_phys(void *addr)
+{
+ struct page *page;
+ u64 paddr = 0;
+
+ page = vmalloc_to_page(addr);
+ if (page)
+ paddr = page_to_pfn(page) << PAGE_SHIFT;
+
+ return paddr;
+}
+
+static int assign_ctxt(struct file *fp, struct hfi1_user_info *uinfo)
+{
+ int i_minor, ret = 0;
+ unsigned swmajor, swminor, alg = HFI1_ALG_ACROSS;
+
+ swmajor = uinfo->userversion >> 16;
+ if (swmajor != HFI1_USER_SWMAJOR) {
+ ret = -ENODEV;
+ goto done;
+ }
+
+ swminor = uinfo->userversion & 0xffff;
+
+ if (uinfo->hfi1_alg < HFI1_ALG_COUNT)
+ alg = uinfo->hfi1_alg;
+
+ mutex_lock(&hfi1_mutex);
+ /* First, lets check if we need to setup a shared context? */
+ if (uinfo->subctxt_cnt)
+ ret = find_shared_ctxt(fp, uinfo);
+
+ /*
+ * We execute the following block if we couldn't find a
+ * shared context or if context sharing is not required.
+ */
+ if (!ret) {
+ i_minor = iminor(file_inode(fp)) - HFI1_USER_MINOR_BASE;
+ ret = get_user_context(fp, uinfo, i_minor - 1, alg);
+ }
+ mutex_unlock(&hfi1_mutex);
+done:
+ return ret;
+}
+
+static int get_user_context(struct file *fp, struct hfi1_user_info *uinfo,
+ int devno, unsigned alg)
+{
+ struct hfi1_devdata *dd = NULL;
+ int ret = 0, devmax, npresent, nup, dev;
+
+ devmax = hfi1_count_units(&npresent, &nup);
+ if (!npresent) {
+ ret = -ENXIO;
+ goto done;
+ }
+ if (!nup) {
+ ret = -ENETDOWN;
+ goto done;
+ }
+ if (devno >= 0) {
+ dd = hfi1_lookup(devno);
+ if (!dd)
+ ret = -ENODEV;
+ else if (!dd->freectxts)
+ ret = -EBUSY;
+ } else {
+ struct hfi1_devdata *pdd;
+
+ if (alg == HFI1_ALG_ACROSS) {
+ unsigned free = 0U;
+
+ for (dev = 0; dev < devmax; dev++) {
+ pdd = hfi1_lookup(dev);
+ if (pdd && pdd->freectxts &&
+ pdd->freectxts > free) {
+ dd = pdd;
+ free = pdd->freectxts;
+ }
+ }
+ } else {
+ for (dev = 0; dev < devmax; dev++) {
+ pdd = hfi1_lookup(dev);
+ if (pdd && pdd->freectxts) {
+ dd = pdd;
+ break;
+ }
+ }
+ }
+ if (!dd)
+ ret = -EBUSY;
+ }
+done:
+ return ret ? ret : allocate_ctxt(fp, dd, uinfo);
+}
+
+static int find_shared_ctxt(struct file *fp,
+ const struct hfi1_user_info *uinfo)
+{
+ int devmax, ndev, i;
+ int ret = 0;
+
+ devmax = hfi1_count_units(NULL, NULL);
+
+ for (ndev = 0; ndev < devmax; ndev++) {
+ struct hfi1_devdata *dd = hfi1_lookup(ndev);
+
+ /* device portion of usable() */
+ if (!(dd && (dd->flags & HFI1_PRESENT) && dd->kregbase))
+ continue;
+ for (i = dd->first_user_ctxt; i < dd->num_rcv_contexts; i++) {
+ struct hfi1_ctxtdata *uctxt = dd->rcd[i];
+
+ /* Skip ctxts which are not yet open */
+ if (!uctxt || !uctxt->cnt)
+ continue;
+ /* Skip ctxt if it doesn't match the requested one */
+ if (memcmp(uctxt->uuid, uinfo->uuid,
+ sizeof(uctxt->uuid)) ||
+ uctxt->subctxt_id != uinfo->subctxt_id ||
+ uctxt->subctxt_cnt != uinfo->subctxt_cnt)
+ continue;
+
+ /* Verify the sharing process matches the master */
+ if (uctxt->userversion != uinfo->userversion ||
+ uctxt->cnt >= uctxt->subctxt_cnt) {
+ ret = -EINVAL;
+ goto done;
+ }
+ ctxt_fp(fp) = uctxt;
+ subctxt_fp(fp) = uctxt->cnt++;
+ uctxt->subpid[subctxt_fp(fp)] = current->pid;
+ uctxt->active_slaves |= 1 << subctxt_fp(fp);
+ ret = 1;
+ goto done;
+ }
+ }
+
+done:
+ return ret;
+}
+
+static int allocate_ctxt(struct file *fp, struct hfi1_devdata *dd,
+ struct hfi1_user_info *uinfo)
+{
+ struct hfi1_ctxtdata *uctxt;
+ unsigned ctxt;
+ int ret;
+
+ if (dd->flags & HFI1_FROZEN) {
+ /*
+ * Pick an error that is unique from all other errors
+ * that are returned so the user process knows that
+ * it tried to allocate while the SPC was frozen. It
+ * it should be able to retry with success in a short
+ * while.
+ */
+ return -EIO;
+ }
+
+ for (ctxt = dd->first_user_ctxt; ctxt < dd->num_rcv_contexts; ctxt++)
+ if (!dd->rcd[ctxt])
+ break;
+
+ if (ctxt == dd->num_rcv_contexts)
+ return -EBUSY;
+
+ uctxt = hfi1_create_ctxtdata(dd->pport, ctxt);
+ if (!uctxt) {
+ dd_dev_err(dd,
+ "Unable to allocate ctxtdata memory, failing open\n");
+ return -ENOMEM;
+ }
+ /*
+ * Allocate and enable a PIO send context.
+ */
+ uctxt->sc = sc_alloc(dd, SC_USER, uctxt->rcvhdrqentsize,
+ uctxt->numa_id);
+ if (!uctxt->sc)
+ return -ENOMEM;
+
+ dbg("allocated send context %u(%u)\n", uctxt->sc->sw_index,
+ uctxt->sc->hw_context);
+ ret = sc_enable(uctxt->sc);
+ if (ret)
+ return ret;
+ /*
+ * Setup shared context resources if the user-level has requested
+ * shared contexts and this is the 'master' process.
+ * This has to be done here so the rest of the sub-contexts find the
+ * proper master.
+ */
+ if (uinfo->subctxt_cnt && !subctxt_fp(fp)) {
+ ret = init_subctxts(uctxt, uinfo);
+ /*
+ * On error, we don't need to disable and de-allocate the
+ * send context because it will be done during file close
+ */
+ if (ret)
+ return ret;
+ }
+ uctxt->userversion = uinfo->userversion;
+ uctxt->pid = current->pid;
+ uctxt->flags = HFI1_CAP_UGET(MASK);
+ init_waitqueue_head(&uctxt->wait);
+ strlcpy(uctxt->comm, current->comm, sizeof(uctxt->comm));
+ memcpy(uctxt->uuid, uinfo->uuid, sizeof(uctxt->uuid));
+ uctxt->jkey = generate_jkey(current_uid());
+ INIT_LIST_HEAD(&uctxt->sdma_queues);
+ spin_lock_init(&uctxt->sdma_qlock);
+ hfi1_stats.sps_ctxts++;
+ dd->freectxts--;
+ ctxt_fp(fp) = uctxt;
+
+ return 0;
+}
+
+static int init_subctxts(struct hfi1_ctxtdata *uctxt,
+ const struct hfi1_user_info *uinfo)
+{
+ int ret = 0;
+ unsigned num_subctxts;
+
+ num_subctxts = uinfo->subctxt_cnt;
+ if (num_subctxts > HFI1_MAX_SHARED_CTXTS) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ uctxt->subctxt_cnt = uinfo->subctxt_cnt;
+ uctxt->subctxt_id = uinfo->subctxt_id;
+ uctxt->active_slaves = 1;
+ uctxt->redirect_seq_cnt = 1;
+ set_bit(HFI1_CTXT_MASTER_UNINIT, &uctxt->event_flags);
+bail:
+ return ret;
+}
+
+static int setup_subctxt(struct hfi1_ctxtdata *uctxt)
+{
+ int ret = 0;
+ unsigned num_subctxts = uctxt->subctxt_cnt;
+
+ uctxt->subctxt_uregbase = vmalloc_user(PAGE_SIZE);
+ if (!uctxt->subctxt_uregbase) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+ /* We can take the size of the RcvHdr Queue from the master */
+ uctxt->subctxt_rcvhdr_base = vmalloc_user(uctxt->rcvhdrq_size *
+ num_subctxts);
+ if (!uctxt->subctxt_rcvhdr_base) {
+ ret = -ENOMEM;
+ goto bail_ureg;
+ }
+
+ uctxt->subctxt_rcvegrbuf = vmalloc_user(uctxt->egrbufs.size *
+ num_subctxts);
+ if (!uctxt->subctxt_rcvegrbuf) {
+ ret = -ENOMEM;
+ goto bail_rhdr;
+ }
+ goto bail;
+bail_rhdr:
+ vfree(uctxt->subctxt_rcvhdr_base);
+bail_ureg:
+ vfree(uctxt->subctxt_uregbase);
+ uctxt->subctxt_uregbase = NULL;
+bail:
+ return ret;
+}
+
+static int user_init(struct file *fp)
+{
+ int ret;
+ unsigned int rcvctrl_ops = 0;
+ struct hfi1_ctxtdata *uctxt = ctxt_fp(fp);
+
+ /* make sure that the context has already been setup */
+ if (!test_bit(HFI1_CTXT_SETUP_DONE, &uctxt->event_flags)) {
+ ret = -EFAULT;
+ goto done;
+ }
+
+ /*
+ * Subctxts don't need to initialize anything since master
+ * has done it.
+ */
+ if (subctxt_fp(fp)) {
+ ret = wait_event_interruptible(uctxt->wait,
+ !test_bit(HFI1_CTXT_MASTER_UNINIT,
+ &uctxt->event_flags));
+ goto done;
+ }
+
+ /* initialize poll variables... */
+ uctxt->urgent = 0;
+ uctxt->urgent_poll = 0;
+
+ /*
+ * Now enable the ctxt for receive.
+ * For chips that are set to DMA the tail register to memory
+ * when they change (and when the update bit transitions from
+ * 0 to 1. So for those chips, we turn it off and then back on.
+ * This will (very briefly) affect any other open ctxts, but the
+ * duration is very short, and therefore isn't an issue. We
+ * explicitly set the in-memory tail copy to 0 beforehand, so we
+ * don't have to wait to be sure the DMA update has happened
+ * (chip resets head/tail to 0 on transition to enable).
+ */
+ if (uctxt->rcvhdrtail_kvaddr)
+ clear_rcvhdrtail(uctxt);
+
+ /* Setup J_KEY before enabling the context */
+ hfi1_set_ctxt_jkey(uctxt->dd, uctxt->ctxt, uctxt->jkey);
+
+ rcvctrl_ops = HFI1_RCVCTRL_CTXT_ENB;
+ if (HFI1_CAP_KGET_MASK(uctxt->flags, HDRSUPP))
+ rcvctrl_ops |= HFI1_RCVCTRL_TIDFLOW_ENB;
+ /*
+ * Ignore the bit in the flags for now until proper
+ * support for multiple packet per rcv array entry is
+ * added.
+ */
+ if (!HFI1_CAP_KGET_MASK(uctxt->flags, MULTI_PKT_EGR))
+ rcvctrl_ops |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB;
+ if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_EGR_FULL))
+ rcvctrl_ops |= HFI1_RCVCTRL_NO_EGR_DROP_ENB;
+ if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_RHQ_FULL))
+ rcvctrl_ops |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB;
+ if (HFI1_CAP_KGET_MASK(uctxt->flags, DMA_RTAIL))
+ rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_ENB;
+ hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt->ctxt);
+
+ /* Notify any waiting slaves */
+ if (uctxt->subctxt_cnt) {
+ clear_bit(HFI1_CTXT_MASTER_UNINIT, &uctxt->event_flags);
+ wake_up(&uctxt->wait);
+ }
+ ret = 0;
+
+done:
+ return ret;
+}
+
+static int get_ctxt_info(struct file *fp, void __user *ubase, __u32 len)
+{
+ struct hfi1_ctxt_info cinfo;
+ struct hfi1_ctxtdata *uctxt = ctxt_fp(fp);
+ struct hfi1_filedata *fd = fp->private_data;
+ int ret = 0;
+
+ ret = hfi1_get_base_kinfo(uctxt, &cinfo);
+ if (ret < 0)
+ goto done;
+ cinfo.num_active = hfi1_count_active_units();
+ cinfo.unit = uctxt->dd->unit;
+ cinfo.ctxt = uctxt->ctxt;
+ cinfo.subctxt = subctxt_fp(fp);
+ cinfo.rcvtids = roundup(uctxt->egrbufs.alloced,
+ uctxt->dd->rcv_entries.group_size) +
+ uctxt->expected_count;
+ cinfo.credits = uctxt->sc->credits;
+ cinfo.numa_node = uctxt->numa_id;
+ cinfo.rec_cpu = fd->rec_cpu_num;
+ cinfo.send_ctxt = uctxt->sc->hw_context;
+
+ cinfo.egrtids = uctxt->egrbufs.alloced;
+ cinfo.rcvhdrq_cnt = uctxt->rcvhdrq_cnt;
+ cinfo.rcvhdrq_entsize = uctxt->rcvhdrqentsize << 2;
+ cinfo.sdma_ring_size = user_sdma_comp_fp(fp)->nentries;
+ cinfo.rcvegr_size = uctxt->egrbufs.rcvtid_size;
+
+ trace_hfi1_ctxt_info(uctxt->dd, uctxt->ctxt, subctxt_fp(fp), cinfo);
+ if (copy_to_user(ubase, &cinfo, sizeof(cinfo)))
+ ret = -EFAULT;
+done:
+ return ret;
+}
+
+static int setup_ctxt(struct file *fp)
+{
+ struct hfi1_ctxtdata *uctxt = ctxt_fp(fp);
+ struct hfi1_devdata *dd = uctxt->dd;
+ int ret = 0;
+
+ /*
+ * Context should be set up only once (including allocation and
+ * programming of eager buffers. This is done if context sharing
+ * is not requested or by the master process.
+ */
+ if (!uctxt->subctxt_cnt || !subctxt_fp(fp)) {
+ ret = hfi1_init_ctxt(uctxt->sc);
+ if (ret)
+ goto done;
+
+ /* Now allocate the RcvHdr queue and eager buffers. */
+ ret = hfi1_create_rcvhdrq(dd, uctxt);
+ if (ret)
+ goto done;
+ ret = hfi1_setup_eagerbufs(uctxt);
+ if (ret)
+ goto done;
+ if (uctxt->subctxt_cnt && !subctxt_fp(fp)) {
+ ret = setup_subctxt(uctxt);
+ if (ret)
+ goto done;
+ }
+ /* Setup Expected Rcv memories */
+ uctxt->tid_pg_list = vzalloc(uctxt->expected_count *
+ sizeof(struct page **));
+ if (!uctxt->tid_pg_list) {
+ ret = -ENOMEM;
+ goto done;
+ }
+ uctxt->physshadow = vzalloc(uctxt->expected_count *
+ sizeof(*uctxt->physshadow));
+ if (!uctxt->physshadow) {
+ ret = -ENOMEM;
+ goto done;
+ }
+ /* allocate expected TID map and initialize the cursor */
+ atomic_set(&uctxt->tidcursor, 0);
+ uctxt->numtidgroups = uctxt->expected_count /
+ dd->rcv_entries.group_size;
+ uctxt->tidmapcnt = uctxt->numtidgroups / BITS_PER_LONG +
+ !!(uctxt->numtidgroups % BITS_PER_LONG);
+ uctxt->tidusemap = kzalloc_node(uctxt->tidmapcnt *
+ sizeof(*uctxt->tidusemap),
+ GFP_KERNEL, uctxt->numa_id);
+ if (!uctxt->tidusemap) {
+ ret = -ENOMEM;
+ goto done;
+ }
+ /*
+ * In case that the number of groups is not a multiple of
+ * 64 (the number of groups in a tidusemap element), mark
+ * the extra ones as used. This will effectively make them
+ * permanently used and should never be assigned. Otherwise,
+ * the code which checks how many free groups we have will
+ * get completely confused about the state of the bits.
+ */
+ if (uctxt->numtidgroups % BITS_PER_LONG)
+ uctxt->tidusemap[uctxt->tidmapcnt - 1] =
+ ~((1ULL << (uctxt->numtidgroups %
+ BITS_PER_LONG)) - 1);
+ trace_hfi1_exp_tid_map(uctxt->ctxt, subctxt_fp(fp), 0,
+ uctxt->tidusemap, uctxt->tidmapcnt);
+ }
+ ret = hfi1_user_sdma_alloc_queues(uctxt, fp);
+ if (ret)
+ goto done;
+
+ set_bit(HFI1_CTXT_SETUP_DONE, &uctxt->event_flags);
+done:
+ return ret;
+}
+
+static int get_base_info(struct file *fp, void __user *ubase, __u32 len)
+{
+ struct hfi1_base_info binfo;
+ struct hfi1_ctxtdata *uctxt = ctxt_fp(fp);
+ struct hfi1_devdata *dd = uctxt->dd;
+ ssize_t sz;
+ unsigned offset;
+ int ret = 0;
+
+ trace_hfi1_uctxtdata(uctxt->dd, uctxt);
+
+ memset(&binfo, 0, sizeof(binfo));
+ binfo.hw_version = dd->revision;
+ binfo.sw_version = HFI1_KERN_SWVERSION;
+ binfo.bthqp = kdeth_qp;
+ binfo.jkey = uctxt->jkey;
+ /*
+ * If more than 64 contexts are enabled the allocated credit
+ * return will span two or three contiguous pages. Since we only
+ * map the page containing the context's credit return address,
+ * we need to calculate the offset in the proper page.
+ */
+ offset = ((u64)uctxt->sc->hw_free -
+ (u64)dd->cr_base[uctxt->numa_id].va) % PAGE_SIZE;
+ binfo.sc_credits_addr = HFI1_MMAP_TOKEN(PIO_CRED, uctxt->ctxt,
+ subctxt_fp(fp), offset);
+ binfo.pio_bufbase = HFI1_MMAP_TOKEN(PIO_BUFS, uctxt->ctxt,
+ subctxt_fp(fp),
+ uctxt->sc->base_addr);
+ binfo.pio_bufbase_sop = HFI1_MMAP_TOKEN(PIO_BUFS_SOP,
+ uctxt->ctxt,
+ subctxt_fp(fp),
+ uctxt->sc->base_addr);
+ binfo.rcvhdr_bufbase = HFI1_MMAP_TOKEN(RCV_HDRQ, uctxt->ctxt,
+ subctxt_fp(fp),
+ uctxt->rcvhdrq);
+ binfo.rcvegr_bufbase = HFI1_MMAP_TOKEN(RCV_EGRBUF, uctxt->ctxt,
+ subctxt_fp(fp),
+ uctxt->egrbufs.rcvtids[0].phys);
+ binfo.sdma_comp_bufbase = HFI1_MMAP_TOKEN(SDMA_COMP, uctxt->ctxt,
+ subctxt_fp(fp), 0);
+ /*
+ * user regs are at
+ * (RXE_PER_CONTEXT_USER + (ctxt * RXE_PER_CONTEXT_SIZE))
+ */
+ binfo.user_regbase = HFI1_MMAP_TOKEN(UREGS, uctxt->ctxt,
+ subctxt_fp(fp), 0);
+ offset = ((((uctxt->ctxt - dd->first_user_ctxt) *
+ HFI1_MAX_SHARED_CTXTS) + subctxt_fp(fp)) *
+ sizeof(*dd->events)) & ~PAGE_MASK;
+ binfo.events_bufbase = HFI1_MMAP_TOKEN(EVENTS, uctxt->ctxt,
+ subctxt_fp(fp),
+ offset);
+ binfo.status_bufbase = HFI1_MMAP_TOKEN(STATUS, uctxt->ctxt,
+ subctxt_fp(fp),
+ dd->status);
+ if (HFI1_CAP_IS_USET(DMA_RTAIL))
+ binfo.rcvhdrtail_base = HFI1_MMAP_TOKEN(RTAIL, uctxt->ctxt,
+ subctxt_fp(fp), 0);
+ if (uctxt->subctxt_cnt) {
+ binfo.subctxt_uregbase = HFI1_MMAP_TOKEN(SUBCTXT_UREGS,
+ uctxt->ctxt,
+ subctxt_fp(fp), 0);
+ binfo.subctxt_rcvhdrbuf = HFI1_MMAP_TOKEN(SUBCTXT_RCV_HDRQ,
+ uctxt->ctxt,
+ subctxt_fp(fp), 0);
+ binfo.subctxt_rcvegrbuf = HFI1_MMAP_TOKEN(SUBCTXT_EGRBUF,
+ uctxt->ctxt,
+ subctxt_fp(fp), 0);
+ }
+ sz = (len < sizeof(binfo)) ? len : sizeof(binfo);
+ if (copy_to_user(ubase, &binfo, sz))
+ ret = -EFAULT;
+ return ret;
+}
+
+static unsigned int poll_urgent(struct file *fp,
+ struct poll_table_struct *pt)
+{
+ struct hfi1_ctxtdata *uctxt = ctxt_fp(fp);
+ struct hfi1_devdata *dd = uctxt->dd;
+ unsigned pollflag;
+
+ poll_wait(fp, &uctxt->wait, pt);
+
+ spin_lock_irq(&dd->uctxt_lock);
+ if (uctxt->urgent != uctxt->urgent_poll) {
+ pollflag = POLLIN | POLLRDNORM;
+ uctxt->urgent_poll = uctxt->urgent;
+ } else {
+ pollflag = 0;
+ set_bit(HFI1_CTXT_WAITING_URG, &uctxt->event_flags);
+ }
+ spin_unlock_irq(&dd->uctxt_lock);
+
+ return pollflag;
+}
+
+static unsigned int poll_next(struct file *fp,
+ struct poll_table_struct *pt)
+{
+ struct hfi1_ctxtdata *uctxt = ctxt_fp(fp);
+ struct hfi1_devdata *dd = uctxt->dd;
+ unsigned pollflag;
+
+ poll_wait(fp, &uctxt->wait, pt);
+
+ spin_lock_irq(&dd->uctxt_lock);
+ if (hdrqempty(uctxt)) {
+ set_bit(HFI1_CTXT_WAITING_RCV, &uctxt->event_flags);
+ hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_ENB, uctxt->ctxt);
+ pollflag = 0;
+ } else
+ pollflag = POLLIN | POLLRDNORM;
+ spin_unlock_irq(&dd->uctxt_lock);
+
+ return pollflag;
+}
+
+/*
+ * Find all user contexts in use, and set the specified bit in their
+ * event mask.
+ * See also find_ctxt() for a similar use, that is specific to send buffers.
+ */
+int hfi1_set_uevent_bits(struct hfi1_pportdata *ppd, const int evtbit)
+{
+ struct hfi1_ctxtdata *uctxt;
+ struct hfi1_devdata *dd = ppd->dd;
+ unsigned ctxt;
+ int ret = 0;
+ unsigned long flags;
+
+ if (!dd->events) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ spin_lock_irqsave(&dd->uctxt_lock, flags);
+ for (ctxt = dd->first_user_ctxt; ctxt < dd->num_rcv_contexts;
+ ctxt++) {
+ uctxt = dd->rcd[ctxt];
+ if (uctxt) {
+ unsigned long *evs = dd->events +
+ (uctxt->ctxt - dd->first_user_ctxt) *
+ HFI1_MAX_SHARED_CTXTS;
+ int i;
+ /*
+ * subctxt_cnt is 0 if not shared, so do base
+ * separately, first, then remaining subctxt, if any
+ */
+ set_bit(evtbit, evs);
+ for (i = 1; i < uctxt->subctxt_cnt; i++)
+ set_bit(evtbit, evs + i);
+ }
+ }
+ spin_unlock_irqrestore(&dd->uctxt_lock, flags);
+done:
+ return ret;
+}
+
+/**
+ * manage_rcvq - manage a context's receive queue
+ * @uctxt: the context
+ * @subctxt: the sub-context
+ * @start_stop: action to carry out
+ *
+ * start_stop == 0 disables receive on the context, for use in queue
+ * overflow conditions. start_stop==1 re-enables, to be used to
+ * re-init the software copy of the head register
+ */
+static int manage_rcvq(struct hfi1_ctxtdata *uctxt, unsigned subctxt,
+ int start_stop)
+{
+ struct hfi1_devdata *dd = uctxt->dd;
+ unsigned int rcvctrl_op;
+
+ if (subctxt)
+ goto bail;
+ /* atomically clear receive enable ctxt. */
+ if (start_stop) {
+ /*
+ * On enable, force in-memory copy of the tail register to
+ * 0, so that protocol code doesn't have to worry about
+ * whether or not the chip has yet updated the in-memory
+ * copy or not on return from the system call. The chip
+ * always resets it's tail register back to 0 on a
+ * transition from disabled to enabled.
+ */
+ if (uctxt->rcvhdrtail_kvaddr)
+ clear_rcvhdrtail(uctxt);
+ rcvctrl_op = HFI1_RCVCTRL_CTXT_ENB;
+ } else
+ rcvctrl_op = HFI1_RCVCTRL_CTXT_DIS;
+ hfi1_rcvctrl(dd, rcvctrl_op, uctxt->ctxt);
+ /* always; new head should be equal to new tail; see above */
+bail:
+ return 0;
+}
+
+/*
+ * clear the event notifier events for this context.
+ * User process then performs actions appropriate to bit having been
+ * set, if desired, and checks again in future.
+ */
+static int user_event_ack(struct hfi1_ctxtdata *uctxt, int subctxt,
+ unsigned long events)
+{
+ int i;
+ struct hfi1_devdata *dd = uctxt->dd;
+ unsigned long *evs;
+
+ if (!dd->events)
+ return 0;
+
+ evs = dd->events + ((uctxt->ctxt - dd->first_user_ctxt) *
+ HFI1_MAX_SHARED_CTXTS) + subctxt;
+
+ for (i = 0; i <= _HFI1_MAX_EVENT_BIT; i++) {
+ if (!test_bit(i, &events))
+ continue;
+ clear_bit(i, evs);
+ }
+ return 0;
+}
+
+#define num_user_pages(vaddr, len) \
+ (1 + (((((unsigned long)(vaddr) + \
+ (unsigned long)(len) - 1) & PAGE_MASK) - \
+ ((unsigned long)vaddr & PAGE_MASK)) >> PAGE_SHIFT))
+
+/**
+ * tzcnt - count the number of trailing zeros in a 64bit value
+ * @value: the value to be examined
+ *
+ * Returns the number of trailing least significant zeros in the
+ * the input value. If the value is zero, return the number of
+ * bits of the value.
+ */
+static inline u8 tzcnt(u64 value)
+{
+ return value ? __builtin_ctzl(value) : sizeof(value) * 8;
+}
+
+static inline unsigned num_free_groups(unsigned long map, u16 *start)
+{
+ unsigned free;
+ u16 bitidx = *start;
+
+ if (bitidx >= BITS_PER_LONG)
+ return 0;
+ /* "Turn off" any bits set before our bit index */
+ map &= ~((1ULL << bitidx) - 1);
+ free = tzcnt(map) - bitidx;
+ while (!free && bitidx < BITS_PER_LONG) {
+ /* Zero out the last set bit so we look at the rest */
+ map &= ~(1ULL << bitidx);
+ /*
+ * Account for the previously checked bits and advance
+ * the bit index. We don't have to check for bitidx
+ * getting bigger than BITS_PER_LONG here as it would
+ * mean extra instructions that we don't need. If it
+ * did happen, it would push free to a negative value
+ * which will break the loop.
+ */
+ free = tzcnt(map) - ++bitidx;
+ }
+ *start = bitidx;
+ return free;
+}
+
+static int exp_tid_setup(struct file *fp, struct hfi1_tid_info *tinfo)
+{
+ int ret = 0;
+ struct hfi1_ctxtdata *uctxt = ctxt_fp(fp);
+ struct hfi1_devdata *dd = uctxt->dd;
+ unsigned tid, mapped = 0, npages, ngroups, exp_groups,
+ tidpairs = uctxt->expected_count / 2;
+ struct page **pages;
+ unsigned long vaddr, tidmap[uctxt->tidmapcnt];
+ dma_addr_t *phys;
+ u32 tidlist[tidpairs], pairidx = 0, tidcursor;
+ u16 useidx, idx, bitidx, tidcnt = 0;
+
+ vaddr = tinfo->vaddr;
+
+ if (vaddr & ~PAGE_MASK) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ npages = num_user_pages(vaddr, tinfo->length);
+ if (!npages) {
+ ret = -EINVAL;
+ goto bail;
+ }
+ if (!access_ok(VERIFY_WRITE, (void __user *)vaddr,
+ npages * PAGE_SIZE)) {
+ dd_dev_err(dd, "Fail vaddr %p, %u pages, !access_ok\n",
+ (void *)vaddr, npages);
+ ret = -EFAULT;
+ goto bail;
+ }
+
+ memset(tidmap, 0, sizeof(tidmap[0]) * uctxt->tidmapcnt);
+ memset(tidlist, 0, sizeof(tidlist[0]) * tidpairs);
+
+ exp_groups = uctxt->expected_count / dd->rcv_entries.group_size;
+ /* which group set do we look at first? */
+ tidcursor = atomic_read(&uctxt->tidcursor);
+ useidx = (tidcursor >> 16) & 0xffff;
+ bitidx = tidcursor & 0xffff;
+
+ /*
+ * Keep going until we've mapped all pages or we've exhausted all
+ * RcvArray entries.
+ * This iterates over the number of tidmaps + 1
+ * (idx <= uctxt->tidmapcnt) so we check the bitmap which we
+ * started from one more time for any free bits before the
+ * starting point bit.
+ */
+ for (mapped = 0, idx = 0;
+ mapped < npages && idx <= uctxt->tidmapcnt;) {
+ u64 i, offset = 0;
+ unsigned free, pinned, pmapped = 0, bits_used;
+ u16 grp;
+
+ /*
+ * "Reserve" the needed group bits under lock so other
+ * processes can't step in the middle of it. Once
+ * reserved, we don't need the lock anymore since we
+ * are guaranteed the groups.
+ */
+ spin_lock(&uctxt->exp_lock);
+ if (uctxt->tidusemap[useidx] == -1ULL ||
+ bitidx >= BITS_PER_LONG) {
+ /* no free groups in the set, use the next */
+ useidx = (useidx + 1) % uctxt->tidmapcnt;
+ idx++;
+ bitidx = 0;
+ spin_unlock(&uctxt->exp_lock);
+ continue;
+ }
+ ngroups = ((npages - mapped) / dd->rcv_entries.group_size) +
+ !!((npages - mapped) % dd->rcv_entries.group_size);
+
+ /*
+ * If we've gotten here, the current set of groups does have
+ * one or more free groups.
+ */
+ free = num_free_groups(uctxt->tidusemap[useidx], &bitidx);
+ if (!free) {
+ /*
+ * Despite the check above, free could still come back
+ * as 0 because we don't check the entire bitmap but
+ * we start from bitidx.
+ */
+ spin_unlock(&uctxt->exp_lock);
+ continue;
+ }
+ bits_used = min(free, ngroups);
+ tidmap[useidx] |= ((1ULL << bits_used) - 1) << bitidx;
+ uctxt->tidusemap[useidx] |= tidmap[useidx];
+ spin_unlock(&uctxt->exp_lock);
+
+ /*
+ * At this point, we know where in the map we have free bits.
+ * properly offset into the various "shadow" arrays and compute
+ * the RcvArray entry index.
+ */
+ offset = ((useidx * BITS_PER_LONG) + bitidx) *
+ dd->rcv_entries.group_size;
+ pages = uctxt->tid_pg_list + offset;
+ phys = uctxt->physshadow + offset;
+ tid = uctxt->expected_base + offset;
+
+ /* Calculate how many pages we can pin based on free bits */
+ pinned = min((bits_used * dd->rcv_entries.group_size),
+ (npages - mapped));
+ /*
+ * Now that we know how many free RcvArray entries we have,
+ * we can pin that many user pages.
+ */
+ ret = hfi1_get_user_pages(vaddr + (mapped * PAGE_SIZE),
+ pinned, pages);
+ if (ret) {
+ /*
+ * We can't continue because the pages array won't be
+ * initialized. This should never happen,
+ * unless perhaps the user has mpin'ed the pages
+ * themselves.
+ */
+ dd_dev_info(dd,
+ "Failed to lock addr %p, %u pages: errno %d\n",
+ (void *) vaddr, pinned, -ret);
+ /*
+ * Let go of the bits that we reserved since we are not
+ * going to use them.
+ */
+ spin_lock(&uctxt->exp_lock);
+ uctxt->tidusemap[useidx] &=
+ ~(((1ULL << bits_used) - 1) << bitidx);
+ spin_unlock(&uctxt->exp_lock);
+ goto done;
+ }
+ /*
+ * How many groups do we need based on how many pages we have
+ * pinned?
+ */
+ ngroups = (pinned / dd->rcv_entries.group_size) +
+ !!(pinned % dd->rcv_entries.group_size);
+ /*
+ * Keep programming RcvArray entries for all the <ngroups> free
+ * groups.
+ */
+ for (i = 0, grp = 0; grp < ngroups; i++, grp++) {
+ unsigned j;
+ u32 pair_size = 0, tidsize;
+ /*
+ * This inner loop will program an entire group or the
+ * array of pinned pages (which ever limit is hit
+ * first).
+ */
+ for (j = 0; j < dd->rcv_entries.group_size &&
+ pmapped < pinned; j++, pmapped++, tid++) {
+ tidsize = PAGE_SIZE;
+ phys[pmapped] = hfi1_map_page(dd->pcidev,
+ pages[pmapped], 0,
+ tidsize, PCI_DMA_FROMDEVICE);
+ trace_hfi1_exp_rcv_set(uctxt->ctxt,
+ subctxt_fp(fp),
+ tid, vaddr,
+ phys[pmapped],
+ pages[pmapped]);
+ /*
+ * Each RcvArray entry is programmed with one
+ * page * worth of memory. This will handle
+ * the 8K MTU as well as anything smaller
+ * due to the fact that both entries in the
+ * RcvTidPair are programmed with a page.
+ * PSM currently does not handle anything
+ * bigger than 8K MTU, so should we even worry
+ * about 10K here?
+ */
+ hfi1_put_tid(dd, tid, PT_EXPECTED,
+ phys[pmapped],
+ ilog2(tidsize >> PAGE_SHIFT) + 1);
+ pair_size += tidsize >> PAGE_SHIFT;
+ EXP_TID_RESET(tidlist[pairidx], LEN, pair_size);
+ if (!(tid % 2)) {
+ tidlist[pairidx] |=
+ EXP_TID_SET(IDX,
+ (tid - uctxt->expected_base)
+ / 2);
+ tidlist[pairidx] |=
+ EXP_TID_SET(CTRL, 1);
+ tidcnt++;
+ } else {
+ tidlist[pairidx] |=
+ EXP_TID_SET(CTRL, 2);
+ pair_size = 0;
+ pairidx++;
+ }
+ }
+ /*
+ * We've programmed the entire group (or as much of the
+ * group as we'll use. Now, it's time to push it out...
+ */
+ flush_wc();
+ }
+ mapped += pinned;
+ atomic_set(&uctxt->tidcursor,
+ (((useidx & 0xffffff) << 16) |
+ ((bitidx + bits_used) & 0xffffff)));
+ }
+ trace_hfi1_exp_tid_map(uctxt->ctxt, subctxt_fp(fp), 0, uctxt->tidusemap,
+ uctxt->tidmapcnt);
+
+done:
+ /* If we've mapped anything, copy relevant info to user */
+ if (mapped) {
+ if (copy_to_user((void __user *)(unsigned long)tinfo->tidlist,
+ tidlist, sizeof(tidlist[0]) * tidcnt)) {
+ ret = -EFAULT;
+ goto done;
+ }
+ /* copy TID info to user */
+ if (copy_to_user((void __user *)(unsigned long)tinfo->tidmap,
+ tidmap, sizeof(tidmap[0]) * uctxt->tidmapcnt))
+ ret = -EFAULT;
+ }
+bail:
+ /*
+ * Calculate mapped length. New Exp TID protocol does not "unwind" and
+ * report an error if it can't map the entire buffer. It just reports
+ * the length that was mapped.
+ */
+ tinfo->length = mapped * PAGE_SIZE;
+ tinfo->tidcnt = tidcnt;
+ return ret;
+}
+
+static int exp_tid_free(struct file *fp, struct hfi1_tid_info *tinfo)
+{
+ struct hfi1_ctxtdata *uctxt = ctxt_fp(fp);
+ struct hfi1_devdata *dd = uctxt->dd;
+ unsigned long tidmap[uctxt->tidmapcnt];
+ struct page **pages;
+ dma_addr_t *phys;
+ u16 idx, bitidx, tid;
+ int ret = 0;
+
+ if (copy_from_user(&tidmap, (void __user *)(unsigned long)
+ tinfo->tidmap,
+ sizeof(tidmap[0]) * uctxt->tidmapcnt)) {
+ ret = -EFAULT;
+ goto done;
+ }
+ for (idx = 0; idx < uctxt->tidmapcnt; idx++) {
+ unsigned long map;
+
+ bitidx = 0;
+ if (!tidmap[idx])
+ continue;
+ map = tidmap[idx];
+ while ((bitidx = tzcnt(map)) < BITS_PER_LONG) {
+ int i, pcount = 0;
+ struct page *pshadow[dd->rcv_entries.group_size];
+ unsigned offset = ((idx * BITS_PER_LONG) + bitidx) *
+ dd->rcv_entries.group_size;
+
+ pages = uctxt->tid_pg_list + offset;
+ phys = uctxt->physshadow + offset;
+ tid = uctxt->expected_base + offset;
+ for (i = 0; i < dd->rcv_entries.group_size;
+ i++, tid++) {
+ if (pages[i]) {
+ hfi1_put_tid(dd, tid, PT_INVALID,
+ 0, 0);
+ trace_hfi1_exp_rcv_free(uctxt->ctxt,
+ subctxt_fp(fp),
+ tid, phys[i],
+ pages[i]);
+ pci_unmap_page(dd->pcidev, phys[i],
+ PAGE_SIZE, PCI_DMA_FROMDEVICE);
+ pshadow[pcount] = pages[i];
+ pages[i] = NULL;
+ pcount++;
+ phys[i] = 0;
+ }
+ }
+ flush_wc();
+ hfi1_release_user_pages(pshadow, pcount);
+ clear_bit(bitidx, &uctxt->tidusemap[idx]);
+ map &= ~(1ULL<<bitidx);
+ }
+ }
+ trace_hfi1_exp_tid_map(uctxt->ctxt, subctxt_fp(fp), 1, uctxt->tidusemap,
+ uctxt->tidmapcnt);
+done:
+ return ret;
+}
+
+static void unlock_exp_tids(struct hfi1_ctxtdata *uctxt)
+{
+ struct hfi1_devdata *dd = uctxt->dd;
+ unsigned tid;
+
+ dd_dev_info(dd, "ctxt %u unlocking any locked expTID pages\n",
+ uctxt->ctxt);
+ for (tid = 0; tid < uctxt->expected_count; tid++) {
+ struct page *p = uctxt->tid_pg_list[tid];
+ dma_addr_t phys;
+
+ if (!p)
+ continue;
+
+ phys = uctxt->physshadow[tid];
+ uctxt->physshadow[tid] = 0;
+ uctxt->tid_pg_list[tid] = NULL;
+ pci_unmap_page(dd->pcidev, phys, PAGE_SIZE, PCI_DMA_FROMDEVICE);
+ hfi1_release_user_pages(&p, 1);
+ }
+}
+
+static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned subctxt,
+ u16 pkey)
+{
+ int ret = -ENOENT, i, intable = 0;
+ struct hfi1_pportdata *ppd = uctxt->ppd;
+ struct hfi1_devdata *dd = uctxt->dd;
+
+ if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++)
+ if (pkey == ppd->pkeys[i]) {
+ intable = 1;
+ break;
+ }
+
+ if (intable)
+ ret = hfi1_set_ctxt_pkey(dd, uctxt->ctxt, pkey);
+done:
+ return ret;
+}
+
+static int ui_open(struct inode *inode, struct file *filp)
+{
+ struct hfi1_devdata *dd;
+
+ dd = container_of(inode->i_cdev, struct hfi1_devdata, ui_cdev);
+ filp->private_data = dd; /* for other methods */
+ return 0;
+}
+
+static int ui_release(struct inode *inode, struct file *filp)
+{
+ /* nothing to do */
+ return 0;
+}
+
+static loff_t ui_lseek(struct file *filp, loff_t offset, int whence)
+{
+ struct hfi1_devdata *dd = filp->private_data;
+
+ switch (whence) {
+ case SEEK_SET:
+ break;
+ case SEEK_CUR:
+ offset += filp->f_pos;
+ break;
+ case SEEK_END:
+ offset = ((dd->kregend - dd->kregbase) + DC8051_DATA_MEM_SIZE) -
+ offset;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (offset < 0)
+ return -EINVAL;
+
+ if (offset >= (dd->kregend - dd->kregbase) + DC8051_DATA_MEM_SIZE)
+ return -EINVAL;
+
+ filp->f_pos = offset;
+
+ return filp->f_pos;
+}
+
+
+/* NOTE: assumes unsigned long is 8 bytes */
+static ssize_t ui_read(struct file *filp, char __user *buf, size_t count,
+ loff_t *f_pos)
+{
+ struct hfi1_devdata *dd = filp->private_data;
+ void __iomem *base = dd->kregbase;
+ unsigned long total, csr_off,
+ barlen = (dd->kregend - dd->kregbase);
+ u64 data;
+
+ /* only read 8 byte quantities */
+ if ((count % 8) != 0)
+ return -EINVAL;
+ /* offset must be 8-byte aligned */
+ if ((*f_pos % 8) != 0)
+ return -EINVAL;
+ /* destination buffer must be 8-byte aligned */
+ if ((unsigned long)buf % 8 != 0)
+ return -EINVAL;
+ /* must be in range */
+ if (*f_pos + count > (barlen + DC8051_DATA_MEM_SIZE))
+ return -EINVAL;
+ /* only set the base if we are not starting past the BAR */
+ if (*f_pos < barlen)
+ base += *f_pos;
+ csr_off = *f_pos;
+ for (total = 0; total < count; total += 8, csr_off += 8) {
+ /* accessing LCB CSRs requires more checks */
+ if (is_lcb_offset(csr_off)) {
+ if (read_lcb_csr(dd, csr_off, (u64 *)&data))
+ break; /* failed */
+ }
+ /*
+ * Cannot read ASIC GPIO/QSFP* clear and force CSRs without a
+ * false parity error. Avoid the whole issue by not reading
+ * them. These registers are defined as having a read value
+ * of 0.
+ */
+ else if (csr_off == ASIC_GPIO_CLEAR
+ || csr_off == ASIC_GPIO_FORCE
+ || csr_off == ASIC_QSFP1_CLEAR
+ || csr_off == ASIC_QSFP1_FORCE
+ || csr_off == ASIC_QSFP2_CLEAR
+ || csr_off == ASIC_QSFP2_FORCE)
+ data = 0;
+ else if (csr_off >= barlen) {
+ /*
+ * read_8051_data can read more than just 8 bytes at
+ * a time. However, folding this into the loop and
+ * handling the reads in 8 byte increments allows us
+ * to smoothly transition from chip memory to 8051
+ * memory.
+ */
+ if (read_8051_data(dd,
+ (u32)(csr_off - barlen),
+ sizeof(data), &data))
+ break; /* failed */
+ } else
+ data = readq(base + total);
+ if (put_user(data, (unsigned long __user *)(buf + total)))
+ break;
+ }
+ *f_pos += total;
+ return total;
+}
+
+/* NOTE: assumes unsigned long is 8 bytes */
+static ssize_t ui_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ struct hfi1_devdata *dd = filp->private_data;
+ void __iomem *base;
+ unsigned long total, data, csr_off;
+ int in_lcb;
+
+ /* only write 8 byte quantities */
+ if ((count % 8) != 0)
+ return -EINVAL;
+ /* offset must be 8-byte aligned */
+ if ((*f_pos % 8) != 0)
+ return -EINVAL;
+ /* source buffer must be 8-byte aligned */
+ if ((unsigned long)buf % 8 != 0)
+ return -EINVAL;
+ /* must be in range */
+ if (*f_pos + count > dd->kregend - dd->kregbase)
+ return -EINVAL;
+
+ base = (void __iomem *)dd->kregbase + *f_pos;
+ csr_off = *f_pos;
+ in_lcb = 0;
+ for (total = 0; total < count; total += 8, csr_off += 8) {
+ if (get_user(data, (unsigned long __user *)(buf + total)))
+ break;
+ /* accessing LCB CSRs requires a special procedure */
+ if (is_lcb_offset(csr_off)) {
+ if (!in_lcb) {
+ int ret = acquire_lcb_access(dd, 1);
+
+ if (ret)
+ break;
+ in_lcb = 1;
+ }
+ } else {
+ if (in_lcb) {
+ release_lcb_access(dd, 1);
+ in_lcb = 0;
+ }
+ }
+ writeq(data, base + total);
+ }
+ if (in_lcb)
+ release_lcb_access(dd, 1);
+ *f_pos += total;
+ return total;
+}
+
+static const struct file_operations ui_file_ops = {
+ .owner = THIS_MODULE,
+ .llseek = ui_lseek,
+ .read = ui_read,
+ .write = ui_write,
+ .open = ui_open,
+ .release = ui_release,
+};
+#define UI_OFFSET 192 /* device minor offset for UI devices */
+static int create_ui = 1;
+
+static struct cdev wildcard_cdev;
+static struct device *wildcard_device;
+
+static atomic_t user_count = ATOMIC_INIT(0);
+
+static void user_remove(struct hfi1_devdata *dd)
+{
+ if (atomic_dec_return(&user_count) == 0)
+ hfi1_cdev_cleanup(&wildcard_cdev, &wildcard_device);
+
+ hfi1_cdev_cleanup(&dd->user_cdev, &dd->user_device);
+ hfi1_cdev_cleanup(&dd->ui_cdev, &dd->ui_device);
+}
+
+static int user_add(struct hfi1_devdata *dd)
+{
+ char name[10];
+ int ret;
+
+ if (atomic_inc_return(&user_count) == 1) {
+ ret = hfi1_cdev_init(0, class_name(), &hfi1_file_ops,
+ &wildcard_cdev, &wildcard_device);
+ if (ret)
+ goto done;
+ }
+
+ snprintf(name, sizeof(name), "%s_%d", class_name(), dd->unit);
+ ret = hfi1_cdev_init(dd->unit + 1, name, &hfi1_file_ops,
+ &dd->user_cdev, &dd->user_device);
+ if (ret)
+ goto done;
+
+ if (create_ui) {
+ snprintf(name, sizeof(name),
+ "%s_ui%d", class_name(), dd->unit);
+ ret = hfi1_cdev_init(dd->unit + UI_OFFSET, name, &ui_file_ops,
+ &dd->ui_cdev, &dd->ui_device);
+ if (ret)
+ goto done;
+ }
+
+ return 0;
+done:
+ user_remove(dd);
+ return ret;
+}
+
+/*
+ * Create per-unit files in /dev
+ */
+int hfi1_device_create(struct hfi1_devdata *dd)
+{
+ int r, ret;
+
+ r = user_add(dd);
+ ret = hfi1_diag_add(dd);
+ if (r && !ret)
+ ret = r;
+ return ret;
+}
+
+/*
+ * Remove per-unit files in /dev
+ * void, core kernel returns no errors for this stuff
+ */
+void hfi1_device_remove(struct hfi1_devdata *dd)
+{
+ user_remove(dd);
+ hfi1_diag_remove(dd);
+}
diff --git a/drivers/staging/rdma/hfi1/firmware.c b/drivers/staging/rdma/hfi1/firmware.c
new file mode 100644
index 0000000..5c2f2ed
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/firmware.c
@@ -0,0 +1,1620 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/firmware.h>
+#include <linux/mutex.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/crc32.h>
+
+#include "hfi.h"
+#include "trace.h"
+
+/*
+ * Make it easy to toggle firmware file name and if it gets loaded by
+ * editing the following. This may be something we do while in development
+ * but not necessarily something a user would ever need to use.
+ */
+#define DEFAULT_FW_8051_NAME_FPGA "hfi_dc8051.bin"
+#define DEFAULT_FW_8051_NAME_ASIC "hfi1_dc8051.fw"
+#define DEFAULT_FW_FABRIC_NAME "hfi1_fabric.fw"
+#define DEFAULT_FW_SBUS_NAME "hfi1_sbus.fw"
+#define DEFAULT_FW_PCIE_NAME "hfi1_pcie.fw"
+#define DEFAULT_PLATFORM_CONFIG_NAME "hfi1_platform.dat"
+
+static uint fw_8051_load = 1;
+static uint fw_fabric_serdes_load = 1;
+static uint fw_pcie_serdes_load = 1;
+static uint fw_sbus_load = 1;
+static uint platform_config_load = 1;
+
+/* Firmware file names get set in hfi1_firmware_init() based on the above */
+static char *fw_8051_name;
+static char *fw_fabric_serdes_name;
+static char *fw_sbus_name;
+static char *fw_pcie_serdes_name;
+static char *platform_config_name;
+
+#define SBUS_MAX_POLL_COUNT 100
+#define SBUS_COUNTER(reg, name) \
+ (((reg) >> ASIC_STS_SBUS_COUNTERS_##name##_CNT_SHIFT) & \
+ ASIC_STS_SBUS_COUNTERS_##name##_CNT_MASK)
+
+/*
+ * Firmware security header.
+ */
+struct css_header {
+ u32 module_type;
+ u32 header_len;
+ u32 header_version;
+ u32 module_id;
+ u32 module_vendor;
+ u32 date; /* BCD yyyymmdd */
+ u32 size; /* in DWORDs */
+ u32 key_size; /* in DWORDs */
+ u32 modulus_size; /* in DWORDs */
+ u32 exponent_size; /* in DWORDs */
+ u32 reserved[22];
+};
+/* expected field values */
+#define CSS_MODULE_TYPE 0x00000006
+#define CSS_HEADER_LEN 0x000000a1
+#define CSS_HEADER_VERSION 0x00010000
+#define CSS_MODULE_VENDOR 0x00008086
+
+#define KEY_SIZE 256
+#define MU_SIZE 8
+#define EXPONENT_SIZE 4
+
+/* the file itself */
+struct firmware_file {
+ struct css_header css_header;
+ u8 modulus[KEY_SIZE];
+ u8 exponent[EXPONENT_SIZE];
+ u8 signature[KEY_SIZE];
+ u8 firmware[];
+};
+
+struct augmented_firmware_file {
+ struct css_header css_header;
+ u8 modulus[KEY_SIZE];
+ u8 exponent[EXPONENT_SIZE];
+ u8 signature[KEY_SIZE];
+ u8 r2[KEY_SIZE];
+ u8 mu[MU_SIZE];
+ u8 firmware[];
+};
+
+/* augmented file size difference */
+#define AUGMENT_SIZE (sizeof(struct augmented_firmware_file) - \
+ sizeof(struct firmware_file))
+
+struct firmware_details {
+ /* Linux core piece */
+ const struct firmware *fw;
+
+ struct css_header *css_header;
+ u8 *firmware_ptr; /* pointer to binary data */
+ u32 firmware_len; /* length in bytes */
+ u8 *modulus; /* pointer to the modulus */
+ u8 *exponent; /* pointer to the exponent */
+ u8 *signature; /* pointer to the signature */
+ u8 *r2; /* pointer to r2 */
+ u8 *mu; /* pointer to mu */
+ struct augmented_firmware_file dummy_header;
+};
+
+/*
+ * The mutex protects fw_state, fw_err, and all of the firmware_details
+ * variables.
+ */
+static DEFINE_MUTEX(fw_mutex);
+enum fw_state {
+ FW_EMPTY,
+ FW_ACQUIRED,
+ FW_ERR
+};
+static enum fw_state fw_state = FW_EMPTY;
+static int fw_err;
+static struct firmware_details fw_8051;
+static struct firmware_details fw_fabric;
+static struct firmware_details fw_pcie;
+static struct firmware_details fw_sbus;
+static const struct firmware *platform_config;
+
+/* flags for turn_off_spicos() */
+#define SPICO_SBUS 0x1
+#define SPICO_FABRIC 0x2
+#define ENABLE_SPICO_SMASK 0x1
+
+/* security block commands */
+#define RSA_CMD_INIT 0x1
+#define RSA_CMD_START 0x2
+
+/* security block status */
+#define RSA_STATUS_IDLE 0x0
+#define RSA_STATUS_ACTIVE 0x1
+#define RSA_STATUS_DONE 0x2
+#define RSA_STATUS_FAILED 0x3
+
+/* RSA engine timeout, in ms */
+#define RSA_ENGINE_TIMEOUT 100 /* ms */
+
+/* hardware mutex timeout, in ms */
+#define HM_TIMEOUT 4000 /* 4 s */
+
+/* 8051 memory access timeout, in us */
+#define DC8051_ACCESS_TIMEOUT 100 /* us */
+
+/* the number of fabric SerDes on the SBus */
+#define NUM_FABRIC_SERDES 4
+
+/* SBus fabric SerDes addresses, one set per HFI */
+static const u8 fabric_serdes_addrs[2][NUM_FABRIC_SERDES] = {
+ { 0x01, 0x02, 0x03, 0x04 },
+ { 0x28, 0x29, 0x2a, 0x2b }
+};
+
+/* SBus PCIe SerDes addresses, one set per HFI */
+static const u8 pcie_serdes_addrs[2][NUM_PCIE_SERDES] = {
+ { 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16,
+ 0x18, 0x1a, 0x1c, 0x1e, 0x20, 0x22, 0x24, 0x26 },
+ { 0x2f, 0x31, 0x33, 0x35, 0x37, 0x39, 0x3b, 0x3d,
+ 0x3f, 0x41, 0x43, 0x45, 0x47, 0x49, 0x4b, 0x4d }
+};
+
+/* SBus PCIe PCS addresses, one set per HFI */
+const u8 pcie_pcs_addrs[2][NUM_PCIE_SERDES] = {
+ { 0x09, 0x0b, 0x0d, 0x0f, 0x11, 0x13, 0x15, 0x17,
+ 0x19, 0x1b, 0x1d, 0x1f, 0x21, 0x23, 0x25, 0x27 },
+ { 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e,
+ 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e }
+};
+
+/* SBus fabric SerDes broadcast addresses, one per HFI */
+static const u8 fabric_serdes_broadcast[2] = { 0xe4, 0xe5 };
+static const u8 all_fabric_serdes_broadcast = 0xe1;
+
+/* SBus PCIe SerDes broadcast addresses, one per HFI */
+const u8 pcie_serdes_broadcast[2] = { 0xe2, 0xe3 };
+static const u8 all_pcie_serdes_broadcast = 0xe0;
+
+/* forwards */
+static void dispose_one_firmware(struct firmware_details *fdet);
+
+/*
+ * Read a single 64-bit value from 8051 data memory.
+ *
+ * Expects:
+ * o caller to have already set up data read, no auto increment
+ * o caller to turn off read enable when finished
+ *
+ * The address argument is a byte offset. Bits 0:2 in the address are
+ * ignored - i.e. the hardware will always do aligned 8-byte reads as if
+ * the lower bits are zero.
+ *
+ * Return 0 on success, -ENXIO on a read error (timeout).
+ */
+static int __read_8051_data(struct hfi1_devdata *dd, u32 addr, u64 *result)
+{
+ u64 reg;
+ int count;
+
+ /* start the read at the given address */
+ reg = ((addr & DC_DC8051_CFG_RAM_ACCESS_CTRL_ADDRESS_MASK)
+ << DC_DC8051_CFG_RAM_ACCESS_CTRL_ADDRESS_SHIFT)
+ | DC_DC8051_CFG_RAM_ACCESS_CTRL_READ_ENA_SMASK;
+ write_csr(dd, DC_DC8051_CFG_RAM_ACCESS_CTRL, reg);
+
+ /* wait until ACCESS_COMPLETED is set */
+ count = 0;
+ while ((read_csr(dd, DC_DC8051_CFG_RAM_ACCESS_STATUS)
+ & DC_DC8051_CFG_RAM_ACCESS_STATUS_ACCESS_COMPLETED_SMASK)
+ == 0) {
+ count++;
+ if (count > DC8051_ACCESS_TIMEOUT) {
+ dd_dev_err(dd, "timeout reading 8051 data\n");
+ return -ENXIO;
+ }
+ ndelay(10);
+ }
+
+ /* gather the data */
+ *result = read_csr(dd, DC_DC8051_CFG_RAM_ACCESS_RD_DATA);
+
+ return 0;
+}
+
+/*
+ * Read 8051 data starting at addr, for len bytes. Will read in 8-byte chunks.
+ * Return 0 on success, -errno on error.
+ */
+int read_8051_data(struct hfi1_devdata *dd, u32 addr, u32 len, u64 *result)
+{
+ unsigned long flags;
+ u32 done;
+ int ret = 0;
+
+ spin_lock_irqsave(&dd->dc8051_memlock, flags);
+
+ /* data read set-up, no auto-increment */
+ write_csr(dd, DC_DC8051_CFG_RAM_ACCESS_SETUP, 0);
+
+ for (done = 0; done < len; addr += 8, done += 8, result++) {
+ ret = __read_8051_data(dd, addr, result);
+ if (ret)
+ break;
+ }
+
+ /* turn off read enable */
+ write_csr(dd, DC_DC8051_CFG_RAM_ACCESS_CTRL, 0);
+
+ spin_unlock_irqrestore(&dd->dc8051_memlock, flags);
+
+ return ret;
+}
+
+/*
+ * Write data or code to the 8051 code or data RAM.
+ */
+static int write_8051(struct hfi1_devdata *dd, int code, u32 start,
+ const u8 *data, u32 len)
+{
+ u64 reg;
+ u32 offset;
+ int aligned, count;
+
+ /* check alignment */
+ aligned = ((unsigned long)data & 0x7) == 0;
+
+ /* write set-up */
+ reg = (code ? DC_DC8051_CFG_RAM_ACCESS_SETUP_RAM_SEL_SMASK : 0ull)
+ | DC_DC8051_CFG_RAM_ACCESS_SETUP_AUTO_INCR_ADDR_SMASK;
+ write_csr(dd, DC_DC8051_CFG_RAM_ACCESS_SETUP, reg);
+
+ reg = ((start & DC_DC8051_CFG_RAM_ACCESS_CTRL_ADDRESS_MASK)
+ << DC_DC8051_CFG_RAM_ACCESS_CTRL_ADDRESS_SHIFT)
+ | DC_DC8051_CFG_RAM_ACCESS_CTRL_WRITE_ENA_SMASK;
+ write_csr(dd, DC_DC8051_CFG_RAM_ACCESS_CTRL, reg);
+
+ /* write */
+ for (offset = 0; offset < len; offset += 8) {
+ int bytes = len - offset;
+
+ if (bytes < 8) {
+ reg = 0;
+ memcpy(®, &data[offset], bytes);
+ } else if (aligned) {
+ reg = *(u64 *)&data[offset];
+ } else {
+ memcpy(®, &data[offset], 8);
+ }
+ write_csr(dd, DC_DC8051_CFG_RAM_ACCESS_WR_DATA, reg);
+
+ /* wait until ACCESS_COMPLETED is set */
+ count = 0;
+ while ((read_csr(dd, DC_DC8051_CFG_RAM_ACCESS_STATUS)
+ & DC_DC8051_CFG_RAM_ACCESS_STATUS_ACCESS_COMPLETED_SMASK)
+ == 0) {
+ count++;
+ if (count > DC8051_ACCESS_TIMEOUT) {
+ dd_dev_err(dd, "timeout writing 8051 data\n");
+ return -ENXIO;
+ }
+ udelay(1);
+ }
+ }
+
+ /* turn off write access, auto increment (also sets to data access) */
+ write_csr(dd, DC_DC8051_CFG_RAM_ACCESS_CTRL, 0);
+ write_csr(dd, DC_DC8051_CFG_RAM_ACCESS_SETUP, 0);
+
+ return 0;
+}
+
+/* return 0 if values match, non-zero and complain otherwise */
+static int invalid_header(struct hfi1_devdata *dd, const char *what,
+ u32 actual, u32 expected)
+{
+ if (actual == expected)
+ return 0;
+
+ dd_dev_err(dd,
+ "invalid firmware header field %s: expected 0x%x, actual 0x%x\n",
+ what, expected, actual);
+ return 1;
+}
+
+/*
+ * Verify that the static fields in the CSS header match.
+ */
+static int verify_css_header(struct hfi1_devdata *dd, struct css_header *css)
+{
+ /* verify CSS header fields (most sizes are in DW, so add /4) */
+ if (invalid_header(dd, "module_type", css->module_type, CSS_MODULE_TYPE)
+ || invalid_header(dd, "header_len", css->header_len,
+ (sizeof(struct firmware_file)/4))
+ || invalid_header(dd, "header_version",
+ css->header_version, CSS_HEADER_VERSION)
+ || invalid_header(dd, "module_vendor",
+ css->module_vendor, CSS_MODULE_VENDOR)
+ || invalid_header(dd, "key_size",
+ css->key_size, KEY_SIZE/4)
+ || invalid_header(dd, "modulus_size",
+ css->modulus_size, KEY_SIZE/4)
+ || invalid_header(dd, "exponent_size",
+ css->exponent_size, EXPONENT_SIZE/4)) {
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * Make sure there are at least some bytes after the prefix.
+ */
+static int payload_check(struct hfi1_devdata *dd, const char *name,
+ long file_size, long prefix_size)
+{
+ /* make sure we have some payload */
+ if (prefix_size >= file_size) {
+ dd_dev_err(dd,
+ "firmware \"%s\", size %ld, must be larger than %ld bytes\n",
+ name, file_size, prefix_size);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * Request the firmware from the system. Extract the pieces and fill in
+ * fdet. If successful, the caller will need to call dispose_one_firmware().
+ * Returns 0 on success, -ERRNO on error.
+ */
+static int obtain_one_firmware(struct hfi1_devdata *dd, const char *name,
+ struct firmware_details *fdet)
+{
+ struct css_header *css;
+ int ret;
+
+ memset(fdet, 0, sizeof(*fdet));
+
+ ret = request_firmware(&fdet->fw, name, &dd->pcidev->dev);
+ if (ret) {
+ dd_dev_err(dd, "cannot load firmware \"%s\", err %d\n",
+ name, ret);
+ return ret;
+ }
+
+ /* verify the firmware */
+ if (fdet->fw->size < sizeof(struct css_header)) {
+ dd_dev_err(dd, "firmware \"%s\" is too small\n", name);
+ ret = -EINVAL;
+ goto done;
+ }
+ css = (struct css_header *)fdet->fw->data;
+
+ hfi1_cdbg(FIRMWARE, "Firmware %s details:", name);
+ hfi1_cdbg(FIRMWARE, "file size: 0x%lx bytes", fdet->fw->size);
+ hfi1_cdbg(FIRMWARE, "CSS structure:");
+ hfi1_cdbg(FIRMWARE, " module_type 0x%x", css->module_type);
+ hfi1_cdbg(FIRMWARE, " header_len 0x%03x (0x%03x bytes)",
+ css->header_len, 4 * css->header_len);
+ hfi1_cdbg(FIRMWARE, " header_version 0x%x", css->header_version);
+ hfi1_cdbg(FIRMWARE, " module_id 0x%x", css->module_id);
+ hfi1_cdbg(FIRMWARE, " module_vendor 0x%x", css->module_vendor);
+ hfi1_cdbg(FIRMWARE, " date 0x%x", css->date);
+ hfi1_cdbg(FIRMWARE, " size 0x%03x (0x%03x bytes)",
+ css->size, 4 * css->size);
+ hfi1_cdbg(FIRMWARE, " key_size 0x%03x (0x%03x bytes)",
+ css->key_size, 4 * css->key_size);
+ hfi1_cdbg(FIRMWARE, " modulus_size 0x%03x (0x%03x bytes)",
+ css->modulus_size, 4 * css->modulus_size);
+ hfi1_cdbg(FIRMWARE, " exponent_size 0x%03x (0x%03x bytes)",
+ css->exponent_size, 4 * css->exponent_size);
+ hfi1_cdbg(FIRMWARE, "firmware size: 0x%lx bytes",
+ fdet->fw->size - sizeof(struct firmware_file));
+
+ /*
+ * If the file does not have a valid CSS header, fail.
+ * Otherwise, check the CSS size field for an expected size.
+ * The augmented file has r2 and mu inserted after the header
+ * was generated, so there will be a known difference between
+ * the CSS header size and the actual file size. Use this
+ * difference to identify an augmented file.
+ *
+ * Note: css->size is in DWORDs, multiply by 4 to get bytes.
+ */
+ ret = verify_css_header(dd, css);
+ if (ret) {
+ dd_dev_info(dd, "Invalid CSS header for \"%s\"\n", name);
+ } else if ((css->size*4) == fdet->fw->size) {
+ /* non-augmented firmware file */
+ struct firmware_file *ff = (struct firmware_file *)
+ fdet->fw->data;
+
+ /* make sure there are bytes in the payload */
+ ret = payload_check(dd, name, fdet->fw->size,
+ sizeof(struct firmware_file));
+ if (ret == 0) {
+ fdet->css_header = css;
+ fdet->modulus = ff->modulus;
+ fdet->exponent = ff->exponent;
+ fdet->signature = ff->signature;
+ fdet->r2 = fdet->dummy_header.r2; /* use dummy space */
+ fdet->mu = fdet->dummy_header.mu; /* use dummy space */
+ fdet->firmware_ptr = ff->firmware;
+ fdet->firmware_len = fdet->fw->size -
+ sizeof(struct firmware_file);
+ /*
+ * Header does not include r2 and mu - generate here.
+ * For now, fail.
+ */
+ dd_dev_err(dd, "driver is unable to validate firmware without r2 and mu (not in firmware file)\n");
+ ret = -EINVAL;
+ }
+ } else if ((css->size*4) + AUGMENT_SIZE == fdet->fw->size) {
+ /* augmented firmware file */
+ struct augmented_firmware_file *aff =
+ (struct augmented_firmware_file *)fdet->fw->data;
+
+ /* make sure there are bytes in the payload */
+ ret = payload_check(dd, name, fdet->fw->size,
+ sizeof(struct augmented_firmware_file));
+ if (ret == 0) {
+ fdet->css_header = css;
+ fdet->modulus = aff->modulus;
+ fdet->exponent = aff->exponent;
+ fdet->signature = aff->signature;
+ fdet->r2 = aff->r2;
+ fdet->mu = aff->mu;
+ fdet->firmware_ptr = aff->firmware;
+ fdet->firmware_len = fdet->fw->size -
+ sizeof(struct augmented_firmware_file);
+ }
+ } else {
+ /* css->size check failed */
+ dd_dev_err(dd,
+ "invalid firmware header field size: expected 0x%lx or 0x%lx, actual 0x%x\n",
+ fdet->fw->size/4, (fdet->fw->size - AUGMENT_SIZE)/4,
+ css->size);
+
+ ret = -EINVAL;
+ }
+
+done:
+ /* if returning an error, clean up after ourselves */
+ if (ret)
+ dispose_one_firmware(fdet);
+ return ret;
+}
+
+static void dispose_one_firmware(struct firmware_details *fdet)
+{
+ release_firmware(fdet->fw);
+ fdet->fw = NULL;
+}
+
+/*
+ * Called by all HFIs when loading their firmware - i.e. device probe time.
+ * The first one will do the actual firmware load. Use a mutex to resolve
+ * any possible race condition.
+ *
+ * The call to this routine cannot be moved to driver load because the kernel
+ * call request_firmware() requires a device which is only available after
+ * the first device probe.
+ */
+static int obtain_firmware(struct hfi1_devdata *dd)
+{
+ int err = 0;
+
+ mutex_lock(&fw_mutex);
+ if (fw_state == FW_ACQUIRED) {
+ goto done; /* already acquired */
+ } else if (fw_state == FW_ERR) {
+ err = fw_err;
+ goto done; /* already tried and failed */
+ }
+
+ if (fw_8051_load) {
+ err = obtain_one_firmware(dd, fw_8051_name, &fw_8051);
+ if (err)
+ goto done;
+ }
+
+ if (fw_fabric_serdes_load) {
+ err = obtain_one_firmware(dd, fw_fabric_serdes_name,
+ &fw_fabric);
+ if (err)
+ goto done;
+ }
+
+ if (fw_sbus_load) {
+ err = obtain_one_firmware(dd, fw_sbus_name, &fw_sbus);
+ if (err)
+ goto done;
+ }
+
+ if (fw_pcie_serdes_load) {
+ err = obtain_one_firmware(dd, fw_pcie_serdes_name, &fw_pcie);
+ if (err)
+ goto done;
+ }
+
+ if (platform_config_load) {
+ platform_config = NULL;
+ err = request_firmware(&platform_config, platform_config_name,
+ &dd->pcidev->dev);
+ if (err) {
+ err = 0;
+ platform_config = NULL;
+ }
+ }
+
+ /* success */
+ fw_state = FW_ACQUIRED;
+
+done:
+ if (err) {
+ fw_err = err;
+ fw_state = FW_ERR;
+ }
+ mutex_unlock(&fw_mutex);
+
+ return err;
+}
+
+/*
+ * Called when the driver unloads. The timing is asymmetric with its
+ * counterpart, obtain_firmware(). If called at device remove time,
+ * then it is conceivable that another device could probe while the
+ * firmware is being disposed. The mutexes can be moved to do that
+ * safely, but then the firmware would be requested from the OS multiple
+ * times.
+ *
+ * No mutex is needed as the driver is unloading and there cannot be any
+ * other callers.
+ */
+void dispose_firmware(void)
+{
+ dispose_one_firmware(&fw_8051);
+ dispose_one_firmware(&fw_fabric);
+ dispose_one_firmware(&fw_pcie);
+ dispose_one_firmware(&fw_sbus);
+
+ release_firmware(platform_config);
+ platform_config = NULL;
+
+ /* retain the error state, otherwise revert to empty */
+ if (fw_state != FW_ERR)
+ fw_state = FW_EMPTY;
+}
+
+/*
+ * Write a block of data to a given array CSR. All calls will be in
+ * multiples of 8 bytes.
+ */
+static void write_rsa_data(struct hfi1_devdata *dd, int what,
+ const u8 *data, int nbytes)
+{
+ int qw_size = nbytes/8;
+ int i;
+
+ if (((unsigned long)data & 0x7) == 0) {
+ /* aligned */
+ u64 *ptr = (u64 *)data;
+
+ for (i = 0; i < qw_size; i++, ptr++)
+ write_csr(dd, what + (8*i), *ptr);
+ } else {
+ /* not aligned */
+ for (i = 0; i < qw_size; i++, data += 8) {
+ u64 value;
+
+ memcpy(&value, data, 8);
+ write_csr(dd, what + (8*i), value);
+ }
+ }
+}
+
+/*
+ * Write a block of data to a given CSR as a stream of writes. All calls will
+ * be in multiples of 8 bytes.
+ */
+static void write_streamed_rsa_data(struct hfi1_devdata *dd, int what,
+ const u8 *data, int nbytes)
+{
+ u64 *ptr = (u64 *)data;
+ int qw_size = nbytes/8;
+
+ for (; qw_size > 0; qw_size--, ptr++)
+ write_csr(dd, what, *ptr);
+}
+
+/*
+ * Download the signature and start the RSA mechanism. Wait for
+ * RSA_ENGINE_TIMEOUT before giving up.
+ */
+static int run_rsa(struct hfi1_devdata *dd, const char *who,
+ const u8 *signature)
+{
+ unsigned long timeout;
+ u64 reg;
+ u32 status;
+ int ret = 0;
+
+ /* write the signature */
+ write_rsa_data(dd, MISC_CFG_RSA_SIGNATURE, signature, KEY_SIZE);
+
+ /* initialize RSA */
+ write_csr(dd, MISC_CFG_RSA_CMD, RSA_CMD_INIT);
+
+ /*
+ * Make sure the engine is idle and insert a delay between the two
+ * writes to MISC_CFG_RSA_CMD.
+ */
+ status = (read_csr(dd, MISC_CFG_FW_CTRL)
+ & MISC_CFG_FW_CTRL_RSA_STATUS_SMASK)
+ >> MISC_CFG_FW_CTRL_RSA_STATUS_SHIFT;
+ if (status != RSA_STATUS_IDLE) {
+ dd_dev_err(dd, "%s security engine not idle - giving up\n",
+ who);
+ return -EBUSY;
+ }
+
+ /* start RSA */
+ write_csr(dd, MISC_CFG_RSA_CMD, RSA_CMD_START);
+
+ /*
+ * Look for the result.
+ *
+ * The RSA engine is hooked up to two MISC errors. The driver
+ * masks these errors as they do not respond to the standard
+ * error "clear down" mechanism. Look for these errors here and
+ * clear them when possible. This routine will exit with the
+ * errors of the current run still set.
+ *
+ * MISC_FW_AUTH_FAILED_ERR
+ * Firmware authorization failed. This can be cleared by
+ * re-initializing the RSA engine, then clearing the status bit.
+ * Do not re-init the RSA angine immediately after a successful
+ * run - this will reset the current authorization.
+ *
+ * MISC_KEY_MISMATCH_ERR
+ * Key does not match. The only way to clear this is to load
+ * a matching key then clear the status bit. If this error
+ * is raised, it will persist outside of this routine until a
+ * matching key is loaded.
+ */
+ timeout = msecs_to_jiffies(RSA_ENGINE_TIMEOUT) + jiffies;
+ while (1) {
+ status = (read_csr(dd, MISC_CFG_FW_CTRL)
+ & MISC_CFG_FW_CTRL_RSA_STATUS_SMASK)
+ >> MISC_CFG_FW_CTRL_RSA_STATUS_SHIFT;
+
+ if (status == RSA_STATUS_IDLE) {
+ /* should not happen */
+ dd_dev_err(dd, "%s firmware security bad idle state\n",
+ who);
+ ret = -EINVAL;
+ break;
+ } else if (status == RSA_STATUS_DONE) {
+ /* finished successfully */
+ break;
+ } else if (status == RSA_STATUS_FAILED) {
+ /* finished unsuccessfully */
+ ret = -EINVAL;
+ break;
+ }
+ /* else still active */
+
+ if (time_after(jiffies, timeout)) {
+ /*
+ * Timed out while active. We can't reset the engine
+ * if it is stuck active, but run through the
+ * error code to see what error bits are set.
+ */
+ dd_dev_err(dd, "%s firmware security time out\n", who);
+ ret = -ETIMEDOUT;
+ break;
+ }
+
+ msleep(20);
+ }
+
+ /*
+ * Arrive here on success or failure. Clear all RSA engine
+ * errors. All current errors will stick - the RSA logic is keeping
+ * error high. All previous errors will clear - the RSA logic
+ * is not keeping the error high.
+ */
+ write_csr(dd, MISC_ERR_CLEAR,
+ MISC_ERR_STATUS_MISC_FW_AUTH_FAILED_ERR_SMASK
+ | MISC_ERR_STATUS_MISC_KEY_MISMATCH_ERR_SMASK);
+ /*
+ * All that is left are the current errors. Print failure details,
+ * if any.
+ */
+ reg = read_csr(dd, MISC_ERR_STATUS);
+ if (ret) {
+ if (reg & MISC_ERR_STATUS_MISC_FW_AUTH_FAILED_ERR_SMASK)
+ dd_dev_err(dd, "%s firmware authorization failed\n",
+ who);
+ if (reg & MISC_ERR_STATUS_MISC_KEY_MISMATCH_ERR_SMASK)
+ dd_dev_err(dd, "%s firmware key mismatch\n", who);
+ }
+
+ return ret;
+}
+
+static void load_security_variables(struct hfi1_devdata *dd,
+ struct firmware_details *fdet)
+{
+ /* Security variables a. Write the modulus */
+ write_rsa_data(dd, MISC_CFG_RSA_MODULUS, fdet->modulus, KEY_SIZE);
+ /* Security variables b. Write the r2 */
+ write_rsa_data(dd, MISC_CFG_RSA_R2, fdet->r2, KEY_SIZE);
+ /* Security variables c. Write the mu */
+ write_rsa_data(dd, MISC_CFG_RSA_MU, fdet->mu, MU_SIZE);
+ /* Security variables d. Write the header */
+ write_streamed_rsa_data(dd, MISC_CFG_SHA_PRELOAD,
+ (u8 *)fdet->css_header, sizeof(struct css_header));
+}
+
+/* return the 8051 firmware state */
+static inline u32 get_firmware_state(struct hfi1_devdata *dd)
+{
+ u64 reg = read_csr(dd, DC_DC8051_STS_CUR_STATE);
+
+ return (reg >> DC_DC8051_STS_CUR_STATE_FIRMWARE_SHIFT)
+ & DC_DC8051_STS_CUR_STATE_FIRMWARE_MASK;
+}
+
+/*
+ * Wait until the firmware is up and ready to take host requests.
+ * Return 0 on success, -ETIMEDOUT on timeout.
+ */
+int wait_fm_ready(struct hfi1_devdata *dd, u32 mstimeout)
+{
+ unsigned long timeout;
+
+ /* in the simulator, the fake 8051 is always ready */
+ if (dd->icode == ICODE_FUNCTIONAL_SIMULATOR)
+ return 0;
+
+ timeout = msecs_to_jiffies(mstimeout) + jiffies;
+ while (1) {
+ if (get_firmware_state(dd) == 0xa0) /* ready */
+ return 0;
+ if (time_after(jiffies, timeout)) /* timed out */
+ return -ETIMEDOUT;
+ usleep_range(1950, 2050); /* sleep 2ms-ish */
+ }
+}
+
+/*
+ * Load the 8051 firmware.
+ */
+static int load_8051_firmware(struct hfi1_devdata *dd,
+ struct firmware_details *fdet)
+{
+ u64 reg;
+ int ret;
+ u8 ver_a, ver_b;
+
+ /*
+ * DC Reset sequence
+ * Load DC 8051 firmware
+ */
+ /*
+ * DC reset step 1: Reset DC8051
+ */
+ reg = DC_DC8051_CFG_RST_M8051W_SMASK
+ | DC_DC8051_CFG_RST_CRAM_SMASK
+ | DC_DC8051_CFG_RST_DRAM_SMASK
+ | DC_DC8051_CFG_RST_IRAM_SMASK
+ | DC_DC8051_CFG_RST_SFR_SMASK;
+ write_csr(dd, DC_DC8051_CFG_RST, reg);
+
+ /*
+ * DC reset step 2 (optional): Load 8051 data memory with link
+ * configuration
+ */
+
+ /*
+ * DC reset step 3: Load DC8051 firmware
+ */
+ /* release all but the core reset */
+ reg = DC_DC8051_CFG_RST_M8051W_SMASK;
+ write_csr(dd, DC_DC8051_CFG_RST, reg);
+
+ /* Firmware load step 1 */
+ load_security_variables(dd, fdet);
+
+ /*
+ * Firmware load step 2. Clear MISC_CFG_FW_CTRL.FW_8051_LOADED
+ */
+ write_csr(dd, MISC_CFG_FW_CTRL, 0);
+
+ /* Firmware load steps 3-5 */
+ ret = write_8051(dd, 1/*code*/, 0, fdet->firmware_ptr,
+ fdet->firmware_len);
+ if (ret)
+ return ret;
+
+ /*
+ * DC reset step 4. Host starts the DC8051 firmware
+ */
+ /*
+ * Firmware load step 6. Set MISC_CFG_FW_CTRL.FW_8051_LOADED
+ */
+ write_csr(dd, MISC_CFG_FW_CTRL, MISC_CFG_FW_CTRL_FW_8051_LOADED_SMASK);
+
+ /* Firmware load steps 7-10 */
+ ret = run_rsa(dd, "8051", fdet->signature);
+ if (ret)
+ return ret;
+
+ /* clear all reset bits, releasing the 8051 */
+ write_csr(dd, DC_DC8051_CFG_RST, 0ull);
+
+ /*
+ * DC reset step 5. Wait for firmware to be ready to accept host
+ * requests.
+ */
+ ret = wait_fm_ready(dd, TIMEOUT_8051_START);
+ if (ret) { /* timed out */
+ dd_dev_err(dd, "8051 start timeout, current state 0x%x\n",
+ get_firmware_state(dd));
+ return -ETIMEDOUT;
+ }
+
+ read_misc_status(dd, &ver_a, &ver_b);
+ dd_dev_info(dd, "8051 firmware version %d.%d\n",
+ (int)ver_b, (int)ver_a);
+ dd->dc8051_ver = dc8051_ver(ver_b, ver_a);
+
+ return 0;
+}
+
+/* SBus Master broadcast address */
+#define SBUS_MASTER_BROADCAST 0xfd
+
+/*
+ * Write the SBus request register
+ *
+ * No need for masking - the arguments are sized exactly.
+ */
+void sbus_request(struct hfi1_devdata *dd,
+ u8 receiver_addr, u8 data_addr, u8 command, u32 data_in)
+{
+ write_csr(dd, ASIC_CFG_SBUS_REQUEST,
+ ((u64)data_in << ASIC_CFG_SBUS_REQUEST_DATA_IN_SHIFT)
+ | ((u64)command << ASIC_CFG_SBUS_REQUEST_COMMAND_SHIFT)
+ | ((u64)data_addr << ASIC_CFG_SBUS_REQUEST_DATA_ADDR_SHIFT)
+ | ((u64)receiver_addr
+ << ASIC_CFG_SBUS_REQUEST_RECEIVER_ADDR_SHIFT));
+}
+
+/*
+ * Turn off the SBus and fabric serdes spicos.
+ *
+ * + Must be called with Sbus fast mode turned on.
+ * + Must be called after fabric serdes broadcast is set up.
+ * + Must be called before the 8051 is loaded - assumes 8051 is not loaded
+ * when using MISC_CFG_FW_CTRL.
+ */
+static void turn_off_spicos(struct hfi1_devdata *dd, int flags)
+{
+ /* only needed on A0 */
+ if (!is_a0(dd))
+ return;
+
+ dd_dev_info(dd, "Turning off spicos:%s%s\n",
+ flags & SPICO_SBUS ? " SBus" : "",
+ flags & SPICO_FABRIC ? " fabric" : "");
+
+ write_csr(dd, MISC_CFG_FW_CTRL, ENABLE_SPICO_SMASK);
+ /* disable SBus spico */
+ if (flags & SPICO_SBUS)
+ sbus_request(dd, SBUS_MASTER_BROADCAST, 0x01,
+ WRITE_SBUS_RECEIVER, 0x00000040);
+
+ /* disable the fabric serdes spicos */
+ if (flags & SPICO_FABRIC)
+ sbus_request(dd, fabric_serdes_broadcast[dd->hfi1_id],
+ 0x07, WRITE_SBUS_RECEIVER, 0x00000000);
+ write_csr(dd, MISC_CFG_FW_CTRL, 0);
+}
+
+/*
+ * Reset all of the fabric serdes for our HFI.
+ */
+void fabric_serdes_reset(struct hfi1_devdata *dd)
+{
+ u8 ra;
+
+ if (dd->icode != ICODE_RTL_SILICON) /* only for RTL */
+ return;
+
+ ra = fabric_serdes_broadcast[dd->hfi1_id];
+
+ acquire_hw_mutex(dd);
+ set_sbus_fast_mode(dd);
+ /* place SerDes in reset and disable SPICO */
+ sbus_request(dd, ra, 0x07, WRITE_SBUS_RECEIVER, 0x00000011);
+ /* wait 100 refclk cycles @ 156.25MHz => 640ns */
+ udelay(1);
+ /* remove SerDes reset */
+ sbus_request(dd, ra, 0x07, WRITE_SBUS_RECEIVER, 0x00000010);
+ /* turn SPICO enable on */
+ sbus_request(dd, ra, 0x07, WRITE_SBUS_RECEIVER, 0x00000002);
+ clear_sbus_fast_mode(dd);
+ release_hw_mutex(dd);
+}
+
+/* Access to the SBus in this routine should probably be serialized */
+int sbus_request_slow(struct hfi1_devdata *dd,
+ u8 receiver_addr, u8 data_addr, u8 command, u32 data_in)
+{
+ u64 reg, count = 0;
+
+ sbus_request(dd, receiver_addr, data_addr, command, data_in);
+ write_csr(dd, ASIC_CFG_SBUS_EXECUTE,
+ ASIC_CFG_SBUS_EXECUTE_EXECUTE_SMASK);
+ /* Wait for both DONE and RCV_DATA_VALID to go high */
+ reg = read_csr(dd, ASIC_STS_SBUS_RESULT);
+ while (!((reg & ASIC_STS_SBUS_RESULT_DONE_SMASK) &&
+ (reg & ASIC_STS_SBUS_RESULT_RCV_DATA_VALID_SMASK))) {
+ if (count++ >= SBUS_MAX_POLL_COUNT) {
+ u64 counts = read_csr(dd, ASIC_STS_SBUS_COUNTERS);
+ /*
+ * If the loop has timed out, we are OK if DONE bit
+ * is set and RCV_DATA_VALID and EXECUTE counters
+ * are the same. If not, we cannot proceed.
+ */
+ if ((reg & ASIC_STS_SBUS_RESULT_DONE_SMASK) &&
+ (SBUS_COUNTER(counts, RCV_DATA_VALID) ==
+ SBUS_COUNTER(counts, EXECUTE)))
+ break;
+ return -ETIMEDOUT;
+ }
+ udelay(1);
+ reg = read_csr(dd, ASIC_STS_SBUS_RESULT);
+ }
+ count = 0;
+ write_csr(dd, ASIC_CFG_SBUS_EXECUTE, 0);
+ /* Wait for DONE to clear after EXECUTE is cleared */
+ reg = read_csr(dd, ASIC_STS_SBUS_RESULT);
+ while (reg & ASIC_STS_SBUS_RESULT_DONE_SMASK) {
+ if (count++ >= SBUS_MAX_POLL_COUNT)
+ return -ETIME;
+ udelay(1);
+ reg = read_csr(dd, ASIC_STS_SBUS_RESULT);
+ }
+ return 0;
+}
+
+static int load_fabric_serdes_firmware(struct hfi1_devdata *dd,
+ struct firmware_details *fdet)
+{
+ int i, err;
+ const u8 ra = fabric_serdes_broadcast[dd->hfi1_id]; /* receiver addr */
+
+ dd_dev_info(dd, "Downloading fabric firmware\n");
+
+ /* step 1: load security variables */
+ load_security_variables(dd, fdet);
+ /* step 2: place SerDes in reset and disable SPICO */
+ sbus_request(dd, ra, 0x07, WRITE_SBUS_RECEIVER, 0x00000011);
+ /* wait 100 refclk cycles @ 156.25MHz => 640ns */
+ udelay(1);
+ /* step 3: remove SerDes reset */
+ sbus_request(dd, ra, 0x07, WRITE_SBUS_RECEIVER, 0x00000010);
+ /* step 4: assert IMEM override */
+ sbus_request(dd, ra, 0x00, WRITE_SBUS_RECEIVER, 0x40000000);
+ /* step 5: download SerDes machine code */
+ for (i = 0; i < fdet->firmware_len; i += 4) {
+ sbus_request(dd, ra, 0x0a, WRITE_SBUS_RECEIVER,
+ *(u32 *)&fdet->firmware_ptr[i]);
+ }
+ /* step 6: IMEM override off */
+ sbus_request(dd, ra, 0x00, WRITE_SBUS_RECEIVER, 0x00000000);
+ /* step 7: turn ECC on */
+ sbus_request(dd, ra, 0x0b, WRITE_SBUS_RECEIVER, 0x000c0000);
+
+ /* steps 8-11: run the RSA engine */
+ err = run_rsa(dd, "fabric serdes", fdet->signature);
+ if (err)
+ return err;
+
+ /* step 12: turn SPICO enable on */
+ sbus_request(dd, ra, 0x07, WRITE_SBUS_RECEIVER, 0x00000002);
+ /* step 13: enable core hardware interrupts */
+ sbus_request(dd, ra, 0x08, WRITE_SBUS_RECEIVER, 0x00000000);
+
+ return 0;
+}
+
+static int load_sbus_firmware(struct hfi1_devdata *dd,
+ struct firmware_details *fdet)
+{
+ int i, err;
+ const u8 ra = SBUS_MASTER_BROADCAST; /* receiver address */
+
+ dd_dev_info(dd, "Downloading SBus firmware\n");
+
+ /* step 1: load security variables */
+ load_security_variables(dd, fdet);
+ /* step 2: place SPICO into reset and enable off */
+ sbus_request(dd, ra, 0x01, WRITE_SBUS_RECEIVER, 0x000000c0);
+ /* step 3: remove reset, enable off, IMEM_CNTRL_EN on */
+ sbus_request(dd, ra, 0x01, WRITE_SBUS_RECEIVER, 0x00000240);
+ /* step 4: set starting IMEM address for burst download */
+ sbus_request(dd, ra, 0x03, WRITE_SBUS_RECEIVER, 0x80000000);
+ /* step 5: download the SBus Master machine code */
+ for (i = 0; i < fdet->firmware_len; i += 4) {
+ sbus_request(dd, ra, 0x14, WRITE_SBUS_RECEIVER,
+ *(u32 *)&fdet->firmware_ptr[i]);
+ }
+ /* step 6: set IMEM_CNTL_EN off */
+ sbus_request(dd, ra, 0x01, WRITE_SBUS_RECEIVER, 0x00000040);
+ /* step 7: turn ECC on */
+ sbus_request(dd, ra, 0x16, WRITE_SBUS_RECEIVER, 0x000c0000);
+
+ /* steps 8-11: run the RSA engine */
+ err = run_rsa(dd, "SBus", fdet->signature);
+ if (err)
+ return err;
+
+ /* step 12: set SPICO_ENABLE on */
+ sbus_request(dd, ra, 0x01, WRITE_SBUS_RECEIVER, 0x00000140);
+
+ return 0;
+}
+
+static int load_pcie_serdes_firmware(struct hfi1_devdata *dd,
+ struct firmware_details *fdet)
+{
+ int i;
+ const u8 ra = SBUS_MASTER_BROADCAST; /* receiver address */
+
+ dd_dev_info(dd, "Downloading PCIe firmware\n");
+
+ /* step 1: load security variables */
+ load_security_variables(dd, fdet);
+ /* step 2: assert single step (halts the SBus Master spico) */
+ sbus_request(dd, ra, 0x05, WRITE_SBUS_RECEIVER, 0x00000001);
+ /* step 3: enable XDMEM access */
+ sbus_request(dd, ra, 0x01, WRITE_SBUS_RECEIVER, 0x00000d40);
+ /* step 4: load firmware into SBus Master XDMEM */
+ /* NOTE: the dmem address, write_en, and wdata are all pre-packed,
+ we only need to pick up the bytes and write them */
+ for (i = 0; i < fdet->firmware_len; i += 4) {
+ sbus_request(dd, ra, 0x04, WRITE_SBUS_RECEIVER,
+ *(u32 *)&fdet->firmware_ptr[i]);
+ }
+ /* step 5: disable XDMEM access */
+ sbus_request(dd, ra, 0x01, WRITE_SBUS_RECEIVER, 0x00000140);
+ /* step 6: allow SBus Spico to run */
+ sbus_request(dd, ra, 0x05, WRITE_SBUS_RECEIVER, 0x00000000);
+
+ /* steps 7-11: run RSA, if it succeeds, firmware is available to
+ be swapped */
+ return run_rsa(dd, "PCIe serdes", fdet->signature);
+}
+
+/*
+ * Set the given broadcast values on the given list of devices.
+ */
+static void set_serdes_broadcast(struct hfi1_devdata *dd, u8 bg1, u8 bg2,
+ const u8 *addrs, int count)
+{
+ while (--count >= 0) {
+ /*
+ * Set BROADCAST_GROUP_1 and BROADCAST_GROUP_2, leave
+ * defaults for everything else. Do not read-modify-write,
+ * per instruction from the manufacturer.
+ *
+ * Register 0xfd:
+ * bits what
+ * ----- ---------------------------------
+ * 0 IGNORE_BROADCAST (default 0)
+ * 11:4 BROADCAST_GROUP_1 (default 0xff)
+ * 23:16 BROADCAST_GROUP_2 (default 0xff)
+ */
+ sbus_request(dd, addrs[count], 0xfd, WRITE_SBUS_RECEIVER,
+ (u32)bg1 << 4 | (u32)bg2 << 16);
+ }
+}
+
+int acquire_hw_mutex(struct hfi1_devdata *dd)
+{
+ unsigned long timeout;
+ int try = 0;
+ u8 mask = 1 << dd->hfi1_id;
+ u8 user;
+
+retry:
+ timeout = msecs_to_jiffies(HM_TIMEOUT) + jiffies;
+ while (1) {
+ write_csr(dd, ASIC_CFG_MUTEX, mask);
+ user = (u8)read_csr(dd, ASIC_CFG_MUTEX);
+ if (user == mask)
+ return 0; /* success */
+ if (time_after(jiffies, timeout))
+ break; /* timed out */
+ msleep(20);
+ }
+
+ /* timed out */
+ dd_dev_err(dd,
+ "Unable to acquire hardware mutex, mutex mask %u, my mask %u (%s)\n",
+ (u32)user, (u32)mask, (try == 0) ? "retrying" : "giving up");
+
+ if (try == 0) {
+ /* break mutex and retry */
+ write_csr(dd, ASIC_CFG_MUTEX, 0);
+ try++;
+ goto retry;
+ }
+
+ return -EBUSY;
+}
+
+void release_hw_mutex(struct hfi1_devdata *dd)
+{
+ write_csr(dd, ASIC_CFG_MUTEX, 0);
+}
+
+void set_sbus_fast_mode(struct hfi1_devdata *dd)
+{
+ write_csr(dd, ASIC_CFG_SBUS_EXECUTE,
+ ASIC_CFG_SBUS_EXECUTE_FAST_MODE_SMASK);
+}
+
+void clear_sbus_fast_mode(struct hfi1_devdata *dd)
+{
+ u64 reg, count = 0;
+
+ reg = read_csr(dd, ASIC_STS_SBUS_COUNTERS);
+ while (SBUS_COUNTER(reg, EXECUTE) !=
+ SBUS_COUNTER(reg, RCV_DATA_VALID)) {
+ if (count++ >= SBUS_MAX_POLL_COUNT)
+ break;
+ udelay(1);
+ reg = read_csr(dd, ASIC_STS_SBUS_COUNTERS);
+ }
+ write_csr(dd, ASIC_CFG_SBUS_EXECUTE, 0);
+}
+
+int load_firmware(struct hfi1_devdata *dd)
+{
+ int ret;
+
+ if (fw_sbus_load || fw_fabric_serdes_load) {
+ ret = acquire_hw_mutex(dd);
+ if (ret)
+ return ret;
+
+ set_sbus_fast_mode(dd);
+
+ /*
+ * The SBus contains part of the fabric firmware and so must
+ * also be downloaded.
+ */
+ if (fw_sbus_load) {
+ turn_off_spicos(dd, SPICO_SBUS);
+ ret = load_sbus_firmware(dd, &fw_sbus);
+ if (ret)
+ goto clear;
+ }
+
+ if (fw_fabric_serdes_load) {
+ set_serdes_broadcast(dd, all_fabric_serdes_broadcast,
+ fabric_serdes_broadcast[dd->hfi1_id],
+ fabric_serdes_addrs[dd->hfi1_id],
+ NUM_FABRIC_SERDES);
+ turn_off_spicos(dd, SPICO_FABRIC);
+ ret = load_fabric_serdes_firmware(dd, &fw_fabric);
+ }
+
+clear:
+ clear_sbus_fast_mode(dd);
+ release_hw_mutex(dd);
+ if (ret)
+ return ret;
+ }
+
+ if (fw_8051_load) {
+ ret = load_8051_firmware(dd, &fw_8051);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+int hfi1_firmware_init(struct hfi1_devdata *dd)
+{
+ /* only RTL can use these */
+ if (dd->icode != ICODE_RTL_SILICON) {
+ fw_fabric_serdes_load = 0;
+ fw_pcie_serdes_load = 0;
+ fw_sbus_load = 0;
+ }
+
+ /* no 8051 or QSFP on simulator */
+ if (dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
+ fw_8051_load = 0;
+ platform_config_load = 0;
+ }
+
+ if (!fw_8051_name) {
+ if (dd->icode == ICODE_RTL_SILICON)
+ fw_8051_name = DEFAULT_FW_8051_NAME_ASIC;
+ else
+ fw_8051_name = DEFAULT_FW_8051_NAME_FPGA;
+ }
+ if (!fw_fabric_serdes_name)
+ fw_fabric_serdes_name = DEFAULT_FW_FABRIC_NAME;
+ if (!fw_sbus_name)
+ fw_sbus_name = DEFAULT_FW_SBUS_NAME;
+ if (!fw_pcie_serdes_name)
+ fw_pcie_serdes_name = DEFAULT_FW_PCIE_NAME;
+ if (!platform_config_name)
+ platform_config_name = DEFAULT_PLATFORM_CONFIG_NAME;
+
+ return obtain_firmware(dd);
+}
+
+int parse_platform_config(struct hfi1_devdata *dd)
+{
+ struct platform_config_cache *pcfgcache = &dd->pcfg_cache;
+ u32 *ptr = NULL;
+ u32 header1 = 0, header2 = 0, magic_num = 0, crc = 0;
+ u32 record_idx = 0, table_type = 0, table_length_dwords = 0;
+
+ if (platform_config == NULL) {
+ dd_dev_info(dd, "%s: Missing config file\n", __func__);
+ goto bail;
+ }
+ ptr = (u32 *)platform_config->data;
+
+ magic_num = *ptr;
+ ptr++;
+ if (magic_num != PLATFORM_CONFIG_MAGIC_NUM) {
+ dd_dev_info(dd, "%s: Bad config file\n", __func__);
+ goto bail;
+ }
+
+ while (ptr < (u32 *)(platform_config->data + platform_config->size)) {
+ header1 = *ptr;
+ header2 = *(ptr + 1);
+ if (header1 != ~header2) {
+ dd_dev_info(dd, "%s: Failed validation at offset %ld\n",
+ __func__, (ptr - (u32 *)platform_config->data));
+ goto bail;
+ }
+
+ record_idx = *ptr &
+ ((1 << PLATFORM_CONFIG_HEADER_RECORD_IDX_LEN_BITS) - 1);
+
+ table_length_dwords = (*ptr >>
+ PLATFORM_CONFIG_HEADER_TABLE_LENGTH_SHIFT) &
+ ((1 << PLATFORM_CONFIG_HEADER_TABLE_LENGTH_LEN_BITS) - 1);
+
+ table_type = (*ptr >> PLATFORM_CONFIG_HEADER_TABLE_TYPE_SHIFT) &
+ ((1 << PLATFORM_CONFIG_HEADER_TABLE_TYPE_LEN_BITS) - 1);
+
+ /* Done with this set of headers */
+ ptr += 2;
+
+ if (record_idx) {
+ /* data table */
+ switch (table_type) {
+ case PLATFORM_CONFIG_SYSTEM_TABLE:
+ pcfgcache->config_tables[table_type].num_table =
+ 1;
+ break;
+ case PLATFORM_CONFIG_PORT_TABLE:
+ pcfgcache->config_tables[table_type].num_table =
+ 2;
+ break;
+ case PLATFORM_CONFIG_RX_PRESET_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_TX_PRESET_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_QSFP_ATTEN_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_VARIABLE_SETTINGS_TABLE:
+ pcfgcache->config_tables[table_type].num_table =
+ table_length_dwords;
+ break;
+ default:
+ dd_dev_info(dd,
+ "%s: Unknown data table %d, offset %ld\n",
+ __func__, table_type,
+ (ptr - (u32 *)platform_config->data));
+ goto bail; /* We don't trust this file now */
+ }
+ pcfgcache->config_tables[table_type].table = ptr;
+ } else {
+ /* metadata table */
+ switch (table_type) {
+ case PLATFORM_CONFIG_SYSTEM_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_PORT_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_RX_PRESET_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_TX_PRESET_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_QSFP_ATTEN_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_VARIABLE_SETTINGS_TABLE:
+ break;
+ default:
+ dd_dev_info(dd,
+ "%s: Unknown metadata table %d, offset %ld\n",
+ __func__, table_type,
+ (ptr - (u32 *)platform_config->data));
+ goto bail; /* We don't trust this file now */
+ }
+ pcfgcache->config_tables[table_type].table_metadata =
+ ptr;
+ }
+
+ /* Calculate and check table crc */
+ crc = crc32_le(~(u32)0, (unsigned char const *)ptr,
+ (table_length_dwords * 4));
+ crc ^= ~(u32)0;
+
+ /* Jump the table */
+ ptr += table_length_dwords;
+ if (crc != *ptr) {
+ dd_dev_info(dd, "%s: Failed CRC check at offset %ld\n",
+ __func__, (ptr - (u32 *)platform_config->data));
+ goto bail;
+ }
+ /* Jump the CRC DWORD */
+ ptr++;
+ }
+
+ pcfgcache->cache_valid = 1;
+ return 0;
+bail:
+ memset(pcfgcache, 0, sizeof(struct platform_config_cache));
+ return -EINVAL;
+}
+
+static int get_platform_fw_field_metadata(struct hfi1_devdata *dd, int table,
+ int field, u32 *field_len_bits, u32 *field_start_bits)
+{
+ struct platform_config_cache *pcfgcache = &dd->pcfg_cache;
+ u32 *src_ptr = NULL;
+
+ if (!pcfgcache->cache_valid)
+ return -EINVAL;
+
+ switch (table) {
+ case PLATFORM_CONFIG_SYSTEM_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_PORT_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_RX_PRESET_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_TX_PRESET_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_QSFP_ATTEN_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_VARIABLE_SETTINGS_TABLE:
+ if (field && field < platform_config_table_limits[table])
+ src_ptr =
+ pcfgcache->config_tables[table].table_metadata + field;
+ break;
+ default:
+ dd_dev_info(dd, "%s: Unknown table\n", __func__);
+ break;
+ }
+
+ if (!src_ptr)
+ return -EINVAL;
+
+ if (field_start_bits)
+ *field_start_bits = *src_ptr &
+ ((1 << METADATA_TABLE_FIELD_START_LEN_BITS) - 1);
+
+ if (field_len_bits)
+ *field_len_bits = (*src_ptr >> METADATA_TABLE_FIELD_LEN_SHIFT)
+ & ((1 << METADATA_TABLE_FIELD_LEN_LEN_BITS) - 1);
+
+ return 0;
+}
+
+/* This is the central interface to getting data out of the platform config
+ * file. It depends on parse_platform_config() having populated the
+ * platform_config_cache in hfi1_devdata, and checks the cache_valid member to
+ * validate the sanity of the cache.
+ *
+ * The non-obvious parameters:
+ * @table_index: Acts as a look up key into which instance of the tables the
+ * relevant field is fetched from.
+ *
+ * This applies to the data tables that have multiple instances. The port table
+ * is an exception to this rule as each HFI only has one port and thus the
+ * relevant table can be distinguished by hfi_id.
+ *
+ * @data: pointer to memory that will be populated with the field requested.
+ * @len: length of memory pointed by @data in bytes.
+ */
+int get_platform_config_field(struct hfi1_devdata *dd,
+ enum platform_config_table_type_encoding table_type,
+ int table_index, int field_index, u32 *data, u32 len)
+{
+ int ret = 0, wlen = 0, seek = 0;
+ u32 field_len_bits = 0, field_start_bits = 0, *src_ptr = NULL;
+ struct platform_config_cache *pcfgcache = &dd->pcfg_cache;
+
+ if (data)
+ memset(data, 0, len);
+ else
+ return -EINVAL;
+
+ ret = get_platform_fw_field_metadata(dd, table_type, field_index,
+ &field_len_bits, &field_start_bits);
+ if (ret)
+ return -EINVAL;
+
+ /* Convert length to bits */
+ len *= 8;
+
+ /* Our metadata function checked cache_valid and field_index for us */
+ switch (table_type) {
+ case PLATFORM_CONFIG_SYSTEM_TABLE:
+ src_ptr = pcfgcache->config_tables[table_type].table;
+
+ if (field_index != SYSTEM_TABLE_QSFP_POWER_CLASS_MAX) {
+ if (len < field_len_bits)
+ return -EINVAL;
+
+ seek = field_start_bits/8;
+ wlen = field_len_bits/8;
+
+ src_ptr = (u32 *)((u8 *)src_ptr + seek);
+
+ /* We expect the field to be byte aligned and whole byte
+ * lengths if we are here */
+ memcpy(data, src_ptr, wlen);
+ return 0;
+ }
+ break;
+ case PLATFORM_CONFIG_PORT_TABLE:
+ /* Port table is 4 DWORDS in META_VERSION 0 */
+ src_ptr = dd->hfi1_id ?
+ pcfgcache->config_tables[table_type].table + 4 :
+ pcfgcache->config_tables[table_type].table;
+ break;
+ case PLATFORM_CONFIG_RX_PRESET_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_TX_PRESET_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_QSFP_ATTEN_TABLE:
+ /* fall through */
+ case PLATFORM_CONFIG_VARIABLE_SETTINGS_TABLE:
+ src_ptr = pcfgcache->config_tables[table_type].table;
+
+ if (table_index <
+ pcfgcache->config_tables[table_type].num_table)
+ src_ptr += table_index;
+ else
+ src_ptr = NULL;
+ break;
+ default:
+ dd_dev_info(dd, "%s: Unknown table\n", __func__);
+ break;
+ }
+
+ if (!src_ptr || len < field_len_bits)
+ return -EINVAL;
+
+ src_ptr += (field_start_bits/32);
+ *data = (*src_ptr >> (field_start_bits % 32)) &
+ ((1 << field_len_bits) - 1);
+
+ return 0;
+}
+
+/*
+ * Download the firmware needed for the Gen3 PCIe SerDes. An update
+ * to the SBus firmware is needed before updating the PCIe firmware.
+ *
+ * Note: caller must be holding the HW mutex.
+ */
+int load_pcie_firmware(struct hfi1_devdata *dd)
+{
+ int ret = 0;
+
+ /* both firmware loads below use the SBus */
+ set_sbus_fast_mode(dd);
+
+ if (fw_sbus_load) {
+ turn_off_spicos(dd, SPICO_SBUS);
+ ret = load_sbus_firmware(dd, &fw_sbus);
+ if (ret)
+ goto done;
+ }
+
+ if (fw_pcie_serdes_load) {
+ dd_dev_info(dd, "Setting PCIe SerDes broadcast\n");
+ set_serdes_broadcast(dd, all_pcie_serdes_broadcast,
+ pcie_serdes_broadcast[dd->hfi1_id],
+ pcie_serdes_addrs[dd->hfi1_id],
+ NUM_PCIE_SERDES);
+ ret = load_pcie_serdes_firmware(dd, &fw_pcie);
+ if (ret)
+ goto done;
+ }
+
+done:
+ clear_sbus_fast_mode(dd);
+
+ return ret;
+}
+
+/*
+ * Read the GUID from the hardware, store it in dd.
+ */
+void read_guid(struct hfi1_devdata *dd)
+{
+ dd->base_guid = read_csr(dd, DC_DC8051_CFG_LOCAL_GUID);
+ dd_dev_info(dd, "GUID %llx",
+ (unsigned long long)dd->base_guid);
+}
diff --git a/drivers/staging/rdma/hfi1/hfi.h b/drivers/staging/rdma/hfi1/hfi.h
new file mode 100644
index 0000000..8ca171b
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/hfi.h
@@ -0,0 +1,1821 @@
+#ifndef _HFI1_KERNEL_H
+#define _HFI1_KERNEL_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/fs.h>
+#include <linux/completion.h>
+#include <linux/kref.h>
+#include <linux/sched.h>
+#include <linux/cdev.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+
+#include "chip_registers.h"
+#include "common.h"
+#include "verbs.h"
+#include "pio.h"
+#include "chip.h"
+#include "mad.h"
+#include "qsfp.h"
+#include "platform_config.h"
+
+/* bumped 1 from s/w major version of TrueScale */
+#define HFI1_CHIP_VERS_MAJ 3U
+
+/* don't care about this except printing */
+#define HFI1_CHIP_VERS_MIN 0U
+
+/* The Organization Unique Identifier (Mfg code), and its position in GUID */
+#define HFI1_OUI 0x001175
+#define HFI1_OUI_LSB 40
+
+#define DROP_PACKET_OFF 0
+#define DROP_PACKET_ON 1
+
+extern unsigned long hfi1_cap_mask;
+#define HFI1_CAP_KGET_MASK(mask, cap) ((mask) & HFI1_CAP_##cap)
+#define HFI1_CAP_UGET_MASK(mask, cap) \
+ (((mask) >> HFI1_CAP_USER_SHIFT) & HFI1_CAP_##cap)
+#define HFI1_CAP_KGET(cap) (HFI1_CAP_KGET_MASK(hfi1_cap_mask, cap))
+#define HFI1_CAP_UGET(cap) (HFI1_CAP_UGET_MASK(hfi1_cap_mask, cap))
+#define HFI1_CAP_IS_KSET(cap) (!!HFI1_CAP_KGET(cap))
+#define HFI1_CAP_IS_USET(cap) (!!HFI1_CAP_UGET(cap))
+#define HFI1_MISC_GET() ((hfi1_cap_mask >> HFI1_CAP_MISC_SHIFT) & \
+ HFI1_CAP_MISC_MASK)
+
+/*
+ * per driver stats, either not device nor port-specific, or
+ * summed over all of the devices and ports.
+ * They are described by name via ipathfs filesystem, so layout
+ * and number of elements can change without breaking compatibility.
+ * If members are added or deleted hfi1_statnames[] in debugfs.c must
+ * change to match.
+ */
+struct hfi1_ib_stats {
+ __u64 sps_ints; /* number of interrupts handled */
+ __u64 sps_errints; /* number of error interrupts */
+ __u64 sps_txerrs; /* tx-related packet errors */
+ __u64 sps_rcverrs; /* non-crc rcv packet errors */
+ __u64 sps_hwerrs; /* hardware errors reported (parity, etc.) */
+ __u64 sps_nopiobufs; /* no pio bufs avail from kernel */
+ __u64 sps_ctxts; /* number of contexts currently open */
+ __u64 sps_lenerrs; /* number of kernel packets where RHF != LRH len */
+ __u64 sps_buffull;
+ __u64 sps_hdrfull;
+};
+
+extern struct hfi1_ib_stats hfi1_stats;
+extern const struct pci_error_handlers hfi1_pci_err_handler;
+
+/*
+ * First-cut criterion for "device is active" is
+ * two thousand dwords combined Tx, Rx traffic per
+ * 5-second interval. SMA packets are 64 dwords,
+ * and occur "a few per second", presumably each way.
+ */
+#define HFI1_TRAFFIC_ACTIVE_THRESHOLD (2000)
+
+/*
+ * Below contains all data related to a single context (formerly called port).
+ */
+
+#ifdef CONFIG_DEBUG_FS
+struct hfi1_opcode_stats_perctx;
+#endif
+
+/*
+ * struct ps_state keeps state associated with RX queue "prescanning"
+ * (prescanning for FECNs, and BECNs), if prescanning is in use.
+ */
+struct ps_state {
+ u32 ps_head;
+ int initialized;
+};
+
+struct ctxt_eager_bufs {
+ ssize_t size; /* total size of eager buffers */
+ u32 count; /* size of buffers array */
+ u32 numbufs; /* number of buffers allocated */
+ u32 alloced; /* number of rcvarray entries used */
+ u32 rcvtid_size; /* size of each eager rcv tid */
+ u32 threshold; /* head update threshold */
+ struct eager_buffer {
+ void *addr;
+ dma_addr_t phys;
+ ssize_t len;
+ } *buffers;
+ struct {
+ void *addr;
+ dma_addr_t phys;
+ } *rcvtids;
+};
+
+struct hfi1_ctxtdata {
+ /* shadow the ctxt's RcvCtrl register */
+ u64 rcvctrl;
+ /* rcvhdrq base, needs mmap before useful */
+ void *rcvhdrq;
+ /* kernel virtual address where hdrqtail is updated */
+ volatile __le64 *rcvhdrtail_kvaddr;
+ /*
+ * Shared page for kernel to signal user processes that send buffers
+ * need disarming. The process should call HFI1_CMD_DISARM_BUFS
+ * or HFI1_CMD_ACK_EVENT with IPATH_EVENT_DISARM_BUFS set.
+ */
+ unsigned long *user_event_mask;
+ /* when waiting for rcv or pioavail */
+ wait_queue_head_t wait;
+ /* rcvhdrq size (for freeing) */
+ size_t rcvhdrq_size;
+ /* number of rcvhdrq entries */
+ u16 rcvhdrq_cnt;
+ /* size of each of the rcvhdrq entries */
+ u16 rcvhdrqentsize;
+ /* mmap of hdrq, must fit in 44 bits */
+ dma_addr_t rcvhdrq_phys;
+ dma_addr_t rcvhdrqtailaddr_phys;
+ struct ctxt_eager_bufs egrbufs;
+ /* this receive context's assigned PIO ACK send context */
+ struct send_context *sc;
+
+ /* dynamic receive available interrupt timeout */
+ u32 rcvavail_timeout;
+ /*
+ * number of opens (including slave sub-contexts) on this instance
+ * (ignoring forks, dup, etc. for now)
+ */
+ int cnt;
+ /*
+ * how much space to leave at start of eager TID entries for
+ * protocol use, on each TID
+ */
+ /* instead of calculating it */
+ unsigned ctxt;
+ /* non-zero if ctxt is being shared. */
+ u16 subctxt_cnt;
+ /* non-zero if ctxt is being shared. */
+ u16 subctxt_id;
+ u8 uuid[16];
+ /* job key */
+ u16 jkey;
+ /* number of RcvArray groups for this context. */
+ u32 rcv_array_groups;
+ /* index of first eager TID entry. */
+ u32 eager_base;
+ /* number of expected TID entries */
+ u32 expected_count;
+ /* index of first expected TID entry. */
+ u32 expected_base;
+ /* cursor into the exp group sets */
+ atomic_t tidcursor;
+ /* number of exp TID groups assigned to the ctxt */
+ u16 numtidgroups;
+ /* size of exp TID group fields in tidusemap */
+ u16 tidmapcnt;
+ /* exp TID group usage bitfield array */
+ unsigned long *tidusemap;
+ /* pinned pages for exp sends, allocated at open */
+ struct page **tid_pg_list;
+ /* dma handles for exp tid pages */
+ dma_addr_t *physshadow;
+ /* lock protecting all Expected TID data */
+ spinlock_t exp_lock;
+ /* number of pio bufs for this ctxt (all procs, if shared) */
+ u32 piocnt;
+ /* first pio buffer for this ctxt */
+ u32 pio_base;
+ /* chip offset of PIO buffers for this ctxt */
+ u32 piobufs;
+ /* per-context configuration flags */
+ u16 flags;
+ /* per-context event flags for fileops/intr communication */
+ unsigned long event_flags;
+ /* WAIT_RCV that timed out, no interrupt */
+ u32 rcvwait_to;
+ /* WAIT_PIO that timed out, no interrupt */
+ u32 piowait_to;
+ /* WAIT_RCV already happened, no wait */
+ u32 rcvnowait;
+ /* WAIT_PIO already happened, no wait */
+ u32 pionowait;
+ /* total number of polled urgent packets */
+ u32 urgent;
+ /* saved total number of polled urgent packets for poll edge trigger */
+ u32 urgent_poll;
+ /* pid of process using this ctxt */
+ pid_t pid;
+ pid_t subpid[HFI1_MAX_SHARED_CTXTS];
+ /* same size as task_struct .comm[], command that opened context */
+ char comm[16];
+ /* so file ops can get at unit */
+ struct hfi1_devdata *dd;
+ /* so functions that need physical port can get it easily */
+ struct hfi1_pportdata *ppd;
+ /* A page of memory for rcvhdrhead, rcvegrhead, rcvegrtail * N */
+ void *subctxt_uregbase;
+ /* An array of pages for the eager receive buffers * N */
+ void *subctxt_rcvegrbuf;
+ /* An array of pages for the eager header queue entries * N */
+ void *subctxt_rcvhdr_base;
+ /* The version of the library which opened this ctxt */
+ u32 userversion;
+ /* Bitmask of active slaves */
+ u32 active_slaves;
+ /* Type of packets or conditions we want to poll for */
+ u16 poll_type;
+ /* receive packet sequence counter */
+ u8 seq_cnt;
+ u8 redirect_seq_cnt;
+ /* ctxt rcvhdrq head offset */
+ u32 head;
+ u32 pkt_count;
+ /* QPs waiting for context processing */
+ struct list_head qp_wait_list;
+ /* interrupt handling */
+ u64 imask; /* clear interrupt mask */
+ int ireg; /* clear interrupt register */
+ unsigned numa_id; /* numa node of this context */
+ /* verbs stats per CTX */
+ struct hfi1_opcode_stats_perctx *opstats;
+ /*
+ * This is the kernel thread that will keep making
+ * progress on the user sdma requests behind the scenes.
+ * There is one per context (shared contexts use the master's).
+ */
+ struct task_struct *progress;
+ struct list_head sdma_queues;
+ spinlock_t sdma_qlock;
+
+#ifdef CONFIG_PRESCAN_RXQ
+ struct ps_state ps_state;
+#endif /* CONFIG_PRESCAN_RXQ */
+
+ /*
+ * The interrupt handler for a particular receive context can vary
+ * throughout it's lifetime. This is not a lock protected data member so
+ * it must be updated atomically and the prev and new value must always
+ * be valid. Worst case is we process an extra interrupt and up to 64
+ * packets with the wrong interrupt handler.
+ */
+ void (*do_interrupt)(struct hfi1_ctxtdata *rcd);
+};
+
+/*
+ * Represents a single packet at a high level. Put commonly computed things in
+ * here so we do not have to keep doing them over and over. The rule of thumb is
+ * if something is used one time to derive some value, store that something in
+ * here. If it is used multiple times, then store the result of that derivation
+ * in here.
+ */
+struct hfi1_packet {
+ void *ebuf;
+ void *hdr;
+ struct hfi1_ctxtdata *rcd;
+ __le32 *rhf_addr;
+ struct hfi1_qp *qp;
+ struct hfi1_other_headers *ohdr;
+ u64 rhf;
+ u32 maxcnt;
+ u32 rhqoff;
+ u32 hdrqtail;
+ int numpkt;
+ u16 tlen;
+ u16 hlen;
+ s16 etail;
+ u16 rsize;
+ u8 updegr;
+ u8 rcv_flags;
+ u8 etype;
+};
+
+static inline bool has_sc4_bit(struct hfi1_packet *p)
+{
+ return !!rhf_dc_info(p->rhf);
+}
+
+/*
+ * Private data for snoop/capture support.
+ */
+struct hfi1_snoop_data {
+ int mode_flag;
+ struct cdev cdev;
+ struct device *class_dev;
+ spinlock_t snoop_lock;
+ struct list_head queue;
+ wait_queue_head_t waitq;
+ void *filter_value;
+ int (*filter_callback)(void *hdr, void *data, void *value);
+ u64 dcc_cfg; /* saved value of DCC Cfg register */
+};
+
+/* snoop mode_flag values */
+#define HFI1_PORT_SNOOP_MODE 1U
+#define HFI1_PORT_CAPTURE_MODE 2U
+
+struct hfi1_sge_state;
+
+/*
+ * Get/Set IB link-level config parameters for f_get/set_ib_cfg()
+ * Mostly for MADs that set or query link parameters, also ipath
+ * config interfaces
+ */
+#define HFI1_IB_CFG_LIDLMC 0 /* LID (LS16b) and Mask (MS16b) */
+#define HFI1_IB_CFG_LWID_DG_ENB 1 /* allowed Link-width downgrade */
+#define HFI1_IB_CFG_LWID_ENB 2 /* allowed Link-width */
+#define HFI1_IB_CFG_LWID 3 /* currently active Link-width */
+#define HFI1_IB_CFG_SPD_ENB 4 /* allowed Link speeds */
+#define HFI1_IB_CFG_SPD 5 /* current Link spd */
+#define HFI1_IB_CFG_RXPOL_ENB 6 /* Auto-RX-polarity enable */
+#define HFI1_IB_CFG_LREV_ENB 7 /* Auto-Lane-reversal enable */
+#define HFI1_IB_CFG_LINKLATENCY 8 /* Link Latency (IB1.2 only) */
+#define HFI1_IB_CFG_HRTBT 9 /* IB heartbeat off/enable/auto; DDR/QDR only */
+#define HFI1_IB_CFG_OP_VLS 10 /* operational VLs */
+#define HFI1_IB_CFG_VL_HIGH_CAP 11 /* num of VL high priority weights */
+#define HFI1_IB_CFG_VL_LOW_CAP 12 /* num of VL low priority weights */
+#define HFI1_IB_CFG_OVERRUN_THRESH 13 /* IB overrun threshold */
+#define HFI1_IB_CFG_PHYERR_THRESH 14 /* IB PHY error threshold */
+#define HFI1_IB_CFG_LINKDEFAULT 15 /* IB link default (sleep/poll) */
+#define HFI1_IB_CFG_PKEYS 16 /* update partition keys */
+#define HFI1_IB_CFG_MTU 17 /* update MTU in IBC */
+#define HFI1_IB_CFG_VL_HIGH_LIMIT 19
+#define HFI1_IB_CFG_PMA_TICKS 20 /* PMA sample tick resolution */
+#define HFI1_IB_CFG_PORT 21 /* switch port we are connected to */
+
+/*
+ * HFI or Host Link States
+ *
+ * These describe the states the driver thinks the logical and physical
+ * states are in. Used as an argument to set_link_state(). Implemented
+ * as bits for easy multi-state checking. The actual state can only be
+ * one.
+ */
+#define __HLS_UP_INIT_BP 0
+#define __HLS_UP_ARMED_BP 1
+#define __HLS_UP_ACTIVE_BP 2
+#define __HLS_DN_DOWNDEF_BP 3 /* link down default */
+#define __HLS_DN_POLL_BP 4
+#define __HLS_DN_DISABLE_BP 5
+#define __HLS_DN_OFFLINE_BP 6
+#define __HLS_VERIFY_CAP_BP 7
+#define __HLS_GOING_UP_BP 8
+#define __HLS_GOING_OFFLINE_BP 9
+#define __HLS_LINK_COOLDOWN_BP 10
+
+#define HLS_UP_INIT (1 << __HLS_UP_INIT_BP)
+#define HLS_UP_ARMED (1 << __HLS_UP_ARMED_BP)
+#define HLS_UP_ACTIVE (1 << __HLS_UP_ACTIVE_BP)
+#define HLS_DN_DOWNDEF (1 << __HLS_DN_DOWNDEF_BP) /* link down default */
+#define HLS_DN_POLL (1 << __HLS_DN_POLL_BP)
+#define HLS_DN_DISABLE (1 << __HLS_DN_DISABLE_BP)
+#define HLS_DN_OFFLINE (1 << __HLS_DN_OFFLINE_BP)
+#define HLS_VERIFY_CAP (1 << __HLS_VERIFY_CAP_BP)
+#define HLS_GOING_UP (1 << __HLS_GOING_UP_BP)
+#define HLS_GOING_OFFLINE (1 << __HLS_GOING_OFFLINE_BP)
+#define HLS_LINK_COOLDOWN (1 << __HLS_LINK_COOLDOWN_BP)
+
+#define HLS_UP (HLS_UP_INIT | HLS_UP_ARMED | HLS_UP_ACTIVE)
+
+/* use this MTU size if none other is given */
+#define HFI1_DEFAULT_ACTIVE_MTU 8192
+/* use this MTU size as the default maximum */
+#define HFI1_DEFAULT_MAX_MTU 8192
+/* default partition key */
+#define DEFAULT_PKEY 0xffff
+
+/*
+ * Possible fabric manager config parameters for fm_{get,set}_table()
+ */
+#define FM_TBL_VL_HIGH_ARB 1 /* Get/set VL high prio weights */
+#define FM_TBL_VL_LOW_ARB 2 /* Get/set VL low prio weights */
+#define FM_TBL_BUFFER_CONTROL 3 /* Get/set Buffer Control */
+#define FM_TBL_SC2VLNT 4 /* Get/set SC->VLnt */
+#define FM_TBL_VL_PREEMPT_ELEMS 5 /* Get (no set) VL preempt elems */
+#define FM_TBL_VL_PREEMPT_MATRIX 6 /* Get (no set) VL preempt matrix */
+
+/*
+ * Possible "operations" for f_rcvctrl(ppd, op, ctxt)
+ * these are bits so they can be combined, e.g.
+ * HFI1_RCVCTRL_INTRAVAIL_ENB | HFI1_RCVCTRL_CTXT_ENB
+ */
+#define HFI1_RCVCTRL_TAILUPD_ENB 0x01
+#define HFI1_RCVCTRL_TAILUPD_DIS 0x02
+#define HFI1_RCVCTRL_CTXT_ENB 0x04
+#define HFI1_RCVCTRL_CTXT_DIS 0x08
+#define HFI1_RCVCTRL_INTRAVAIL_ENB 0x10
+#define HFI1_RCVCTRL_INTRAVAIL_DIS 0x20
+#define HFI1_RCVCTRL_PKEY_ENB 0x40 /* Note, default is enabled */
+#define HFI1_RCVCTRL_PKEY_DIS 0x80
+#define HFI1_RCVCTRL_TIDFLOW_ENB 0x0400
+#define HFI1_RCVCTRL_TIDFLOW_DIS 0x0800
+#define HFI1_RCVCTRL_ONE_PKT_EGR_ENB 0x1000
+#define HFI1_RCVCTRL_ONE_PKT_EGR_DIS 0x2000
+#define HFI1_RCVCTRL_NO_RHQ_DROP_ENB 0x4000
+#define HFI1_RCVCTRL_NO_RHQ_DROP_DIS 0x8000
+#define HFI1_RCVCTRL_NO_EGR_DROP_ENB 0x10000
+#define HFI1_RCVCTRL_NO_EGR_DROP_DIS 0x20000
+
+/* partition enforcement flags */
+#define HFI1_PART_ENFORCE_IN 0x1
+#define HFI1_PART_ENFORCE_OUT 0x2
+
+/* how often we check for synthetic counter wrap around */
+#define SYNTH_CNT_TIME 2
+
+/* Counter flags */
+#define CNTR_NORMAL 0x0 /* Normal counters, just read register */
+#define CNTR_SYNTH 0x1 /* Synthetic counters, saturate at all 1s */
+#define CNTR_DISABLED 0x2 /* Disable this counter */
+#define CNTR_32BIT 0x4 /* Simulate 64 bits for this counter */
+#define CNTR_VL 0x8 /* Per VL counter */
+#define CNTR_INVALID_VL -1 /* Specifies invalid VL */
+#define CNTR_MODE_W 0x0
+#define CNTR_MODE_R 0x1
+
+/* VLs Supported/Operational */
+#define HFI1_MIN_VLS_SUPPORTED 1
+#define HFI1_MAX_VLS_SUPPORTED 8
+
+static inline void incr_cntr64(u64 *cntr)
+{
+ if (*cntr < (u64)-1LL)
+ (*cntr)++;
+}
+
+static inline void incr_cntr32(u32 *cntr)
+{
+ if (*cntr < (u32)-1LL)
+ (*cntr)++;
+}
+
+#define MAX_NAME_SIZE 64
+struct hfi1_msix_entry {
+ struct msix_entry msix;
+ void *arg;
+ char name[MAX_NAME_SIZE];
+ cpumask_var_t mask;
+};
+
+/* per-SL CCA information */
+struct cca_timer {
+ struct hrtimer hrtimer;
+ struct hfi1_pportdata *ppd; /* read-only */
+ int sl; /* read-only */
+ u16 ccti; /* read/write - current value of CCTI */
+};
+
+struct link_down_reason {
+ /*
+ * SMA-facing value. Should be set from .latest when
+ * HLS_UP_* -> HLS_DN_* transition actually occurs.
+ */
+ u8 sma;
+ u8 latest;
+};
+
+enum {
+ LO_PRIO_TABLE,
+ HI_PRIO_TABLE,
+ MAX_PRIO_TABLE
+};
+
+struct vl_arb_cache {
+ spinlock_t lock;
+ struct ib_vl_weight_elem table[VL_ARB_TABLE_SIZE];
+};
+
+/*
+ * The structure below encapsulates data relevant to a physical IB Port.
+ * Current chips support only one such port, but the separation
+ * clarifies things a bit. Note that to conform to IB conventions,
+ * port-numbers are one-based. The first or only port is port1.
+ */
+struct hfi1_pportdata {
+ struct hfi1_ibport ibport_data;
+
+ struct hfi1_devdata *dd;
+ struct kobject pport_cc_kobj;
+ struct kobject sc2vl_kobj;
+ struct kobject sl2sc_kobj;
+ struct kobject vl2mtu_kobj;
+
+ /* QSFP support */
+ struct qsfp_data qsfp_info;
+
+ /* GUID for this interface, in host order */
+ u64 guid;
+ /* GUID for peer interface, in host order */
+ u64 neighbor_guid;
+
+ /* up or down physical link state */
+ u32 linkup;
+
+ /*
+ * this address is mapped read-only into user processes so they can
+ * get status cheaply, whenever they want. One qword of status per port
+ */
+ u64 *statusp;
+
+ /* SendDMA related entries */
+
+ struct workqueue_struct *hfi1_wq;
+
+ /* move out of interrupt context */
+ struct work_struct link_vc_work;
+ struct work_struct link_up_work;
+ struct work_struct link_down_work;
+ struct work_struct sma_message_work;
+ struct work_struct freeze_work;
+ struct work_struct link_downgrade_work;
+ struct work_struct link_bounce_work;
+ /* host link state variables */
+ struct mutex hls_lock;
+ u32 host_link_state;
+
+ spinlock_t sdma_alllock ____cacheline_aligned_in_smp;
+
+ u32 lstate; /* logical link state */
+
+ /* these are the "32 bit" regs */
+
+ u32 ibmtu; /* The MTU programmed for this unit */
+ /*
+ * Current max size IB packet (in bytes) including IB headers, that
+ * we can send. Changes when ibmtu changes.
+ */
+ u32 ibmaxlen;
+ u32 current_egress_rate; /* units [10^6 bits/sec] */
+ /* LID programmed for this instance */
+ u16 lid;
+ /* list of pkeys programmed; 0 if not set */
+ u16 pkeys[MAX_PKEY_VALUES];
+ u16 link_width_supported;
+ u16 link_width_downgrade_supported;
+ u16 link_speed_supported;
+ u16 link_width_enabled;
+ u16 link_width_downgrade_enabled;
+ u16 link_speed_enabled;
+ u16 link_width_active;
+ u16 link_width_downgrade_tx_active;
+ u16 link_width_downgrade_rx_active;
+ u16 link_speed_active;
+ u8 vls_supported;
+ u8 vls_operational;
+ /* LID mask control */
+ u8 lmc;
+ /* Rx Polarity inversion (compensate for ~tx on partner) */
+ u8 rx_pol_inv;
+
+ u8 hw_pidx; /* physical port index */
+ u8 port; /* IB port number and index into dd->pports - 1 */
+ /* type of neighbor node */
+ u8 neighbor_type;
+ u8 neighbor_normal;
+ u8 neighbor_fm_security; /* 1 if firmware checking is disabled */
+ u8 neighbor_port_number;
+ u8 is_sm_config_started;
+ u8 offline_disabled_reason;
+ u8 is_active_optimize_enabled;
+ u8 driver_link_ready; /* driver ready for active link */
+ u8 link_enabled; /* link enabled? */
+ u8 linkinit_reason;
+ u8 local_tx_rate; /* rate given to 8051 firmware */
+
+ /* placeholders for IB MAD packet settings */
+ u8 overrun_threshold;
+ u8 phy_error_threshold;
+
+ /* used to override LED behavior */
+ u8 led_override; /* Substituted for normal value, if non-zero */
+ u16 led_override_timeoff; /* delta to next timer event */
+ u8 led_override_vals[2]; /* Alternates per blink-frame */
+ u8 led_override_phase; /* Just counts, LSB picks from vals[] */
+ atomic_t led_override_timer_active;
+ /* Used to flash LEDs in override mode */
+ struct timer_list led_override_timer;
+ u32 sm_trap_qp;
+ u32 sa_qp;
+
+ /*
+ * cca_timer_lock protects access to the per-SL cca_timer
+ * structures (specifically the ccti member).
+ */
+ spinlock_t cca_timer_lock ____cacheline_aligned_in_smp;
+ struct cca_timer cca_timer[OPA_MAX_SLS];
+
+ /* List of congestion control table entries */
+ struct ib_cc_table_entry_shadow ccti_entries[CC_TABLE_SHADOW_MAX];
+
+ /* congestion entries, each entry corresponding to a SL */
+ struct opa_congestion_setting_entry_shadow
+ congestion_entries[OPA_MAX_SLS];
+
+ /*
+ * cc_state_lock protects (write) access to the per-port
+ * struct cc_state.
+ */
+ spinlock_t cc_state_lock ____cacheline_aligned_in_smp;
+
+ struct cc_state __rcu *cc_state;
+
+ /* Total number of congestion control table entries */
+ u16 total_cct_entry;
+
+ /* Bit map identifying service level */
+ u32 cc_sl_control_map;
+
+ /* CA's max number of 64 entry units in the congestion control table */
+ u8 cc_max_table_entries;
+
+ /* begin congestion log related entries
+ * cc_log_lock protects all congestion log related data */
+ spinlock_t cc_log_lock ____cacheline_aligned_in_smp;
+ u8 threshold_cong_event_map[OPA_MAX_SLS/8];
+ u16 threshold_event_counter;
+ struct opa_hfi1_cong_log_event_internal cc_events[OPA_CONG_LOG_ELEMS];
+ int cc_log_idx; /* index for logging events */
+ int cc_mad_idx; /* index for reporting events */
+ /* end congestion log related entries */
+
+ struct vl_arb_cache vl_arb_cache[MAX_PRIO_TABLE];
+
+ /* port relative counter buffer */
+ u64 *cntrs;
+ /* port relative synthetic counter buffer */
+ u64 *scntrs;
+ /* we synthesize port_xmit_discards from several egress errors */
+ u64 port_xmit_discards;
+ u64 port_xmit_constraint_errors;
+ u64 port_rcv_constraint_errors;
+ /* count of 'link_err' interrupts from DC */
+ u64 link_downed;
+ /* number of times link retrained successfully */
+ u64 link_up;
+ /* port_ltp_crc_mode is returned in 'portinfo' MADs */
+ u16 port_ltp_crc_mode;
+ /* port_crc_mode_enabled is the crc we support */
+ u8 port_crc_mode_enabled;
+ /* mgmt_allowed is also returned in 'portinfo' MADs */
+ u8 mgmt_allowed;
+ u8 part_enforce; /* partition enforcement flags */
+ struct link_down_reason local_link_down_reason;
+ struct link_down_reason neigh_link_down_reason;
+ /* Value to be sent to link peer on LinkDown .*/
+ u8 remote_link_down_reason;
+ /* Error events that will cause a port bounce. */
+ u32 port_error_action;
+};
+
+typedef int (*rhf_rcv_function_ptr)(struct hfi1_packet *packet);
+
+typedef void (*opcode_handler)(struct hfi1_packet *packet);
+
+/* return values for the RHF receive functions */
+#define RHF_RCV_CONTINUE 0 /* keep going */
+#define RHF_RCV_DONE 1 /* stop, this packet processed */
+#define RHF_RCV_REPROCESS 2 /* stop. retain this packet */
+
+struct rcv_array_data {
+ u8 group_size;
+ u16 ngroups;
+ u16 nctxt_extra;
+};
+
+struct per_vl_data {
+ u16 mtu;
+ struct send_context *sc;
+};
+
+/* 16 to directly index */
+#define PER_VL_SEND_CONTEXTS 16
+
+struct err_info_rcvport {
+ u8 status_and_code;
+ u64 packet_flit1;
+ u64 packet_flit2;
+};
+
+struct err_info_constraint {
+ u8 status;
+ u16 pkey;
+ u32 slid;
+};
+
+struct hfi1_temp {
+ unsigned int curr; /* current temperature */
+ unsigned int lo_lim; /* low temperature limit */
+ unsigned int hi_lim; /* high temperature limit */
+ unsigned int crit_lim; /* critical temperature limit */
+ u8 triggers; /* temperature triggers */
+};
+
+/* device data struct now contains only "general per-device" info.
+ * fields related to a physical IB port are in a hfi1_pportdata struct.
+ */
+struct sdma_engine;
+struct sdma_vl_map;
+
+#define BOARD_VERS_MAX 96 /* how long the version string can be */
+#define SERIAL_MAX 16 /* length of the serial number */
+
+struct hfi1_devdata {
+ struct hfi1_ibdev verbs_dev; /* must be first */
+ struct list_head list;
+ /* pointers to related structs for this device */
+ /* pci access data structure */
+ struct pci_dev *pcidev;
+ struct cdev user_cdev;
+ struct cdev diag_cdev;
+ struct cdev ui_cdev;
+ struct device *user_device;
+ struct device *diag_device;
+ struct device *ui_device;
+
+ /* mem-mapped pointer to base of chip regs */
+ u8 __iomem *kregbase;
+ /* end of mem-mapped chip space excluding sendbuf and user regs */
+ u8 __iomem *kregend;
+ /* physical address of chip for io_remap, etc. */
+ resource_size_t physaddr;
+ /* receive context data */
+ struct hfi1_ctxtdata **rcd;
+ /* send context data */
+ struct send_context_info *send_contexts;
+ /* map hardware send contexts to software index */
+ u8 *hw_to_sw;
+ /* spinlock for allocating and releasing send context resources */
+ spinlock_t sc_lock;
+ /* Per VL data. Enough for all VLs but not all elements are set/used. */
+ struct per_vl_data vld[PER_VL_SEND_CONTEXTS];
+ /* seqlock for sc2vl */
+ seqlock_t sc2vl_lock;
+ u64 sc2vl[4];
+ /* Send Context initialization lock. */
+ spinlock_t sc_init_lock;
+
+ /* fields common to all SDMA engines */
+
+ /* default flags to last descriptor */
+ u64 default_desc1;
+ volatile __le64 *sdma_heads_dma; /* DMA'ed by chip */
+ dma_addr_t sdma_heads_phys;
+ void *sdma_pad_dma; /* DMA'ed by chip */
+ dma_addr_t sdma_pad_phys;
+ /* for deallocation */
+ size_t sdma_heads_size;
+ /* number from the chip */
+ u32 chip_sdma_engines;
+ /* num used */
+ u32 num_sdma;
+ /* lock for sdma_map */
+ spinlock_t sde_map_lock;
+ /* array of engines sized by num_sdma */
+ struct sdma_engine *per_sdma;
+ /* array of vl maps */
+ struct sdma_vl_map __rcu *sdma_map;
+ /* SPC freeze waitqueue and variable */
+ wait_queue_head_t sdma_unfreeze_wq;
+ atomic_t sdma_unfreeze_count;
+
+
+ /* hfi1_pportdata, points to array of (physical) port-specific
+ * data structs, indexed by pidx (0..n-1)
+ */
+ struct hfi1_pportdata *pport;
+
+ /* mem-mapped pointer to base of PIO buffers */
+ void __iomem *piobase;
+ /*
+ * write-combining mem-mapped pointer to base of RcvArray
+ * memory.
+ */
+ void __iomem *rcvarray_wc;
+ /*
+ * credit return base - a per-NUMA range of DMA address that
+ * the chip will use to update the per-context free counter
+ */
+ struct credit_return_base *cr_base;
+
+ /* send context numbers and sizes for each type */
+ struct sc_config_sizes sc_sizes[SC_MAX];
+
+ u32 lcb_access_count; /* count of LCB users */
+
+ char *boardname; /* human readable board info */
+
+ /* device (not port) flags, basically device capabilities */
+ u32 flags;
+
+ /* reset value */
+ u64 z_int_counter;
+ u64 z_rcv_limit;
+ /* percpu int_counter */
+ u64 __percpu *int_counter;
+ u64 __percpu *rcv_limit;
+
+ /* number of receive contexts in use by the driver */
+ u32 num_rcv_contexts;
+ /* number of pio send contexts in use by the driver */
+ u32 num_send_contexts;
+ /*
+ * number of ctxts available for PSM open
+ */
+ u32 freectxts;
+ /* base receive interrupt timeout, in CSR units */
+ u32 rcv_intr_timeout_csr;
+
+ u64 __iomem *egrtidbase;
+ spinlock_t sendctrl_lock; /* protect changes to SendCtrl */
+ spinlock_t rcvctrl_lock; /* protect changes to RcvCtrl */
+ /* around rcd and (user ctxts) ctxt_cnt use (intr vs free) */
+ spinlock_t uctxt_lock; /* rcd and user context changes */
+ /* exclusive access to 8051 */
+ spinlock_t dc8051_lock;
+ /* exclusive access to 8051 memory */
+ spinlock_t dc8051_memlock;
+ int dc8051_timed_out; /* remember if the 8051 timed out */
+ /*
+ * A page that will hold event notification bitmaps for all
+ * contexts. This page will be mapped into all processes.
+ */
+ unsigned long *events;
+ /*
+ * per unit status, see also portdata statusp
+ * mapped read-only into user processes so they can get unit and
+ * IB link status cheaply
+ */
+ struct hfi1_status *status;
+ u32 freezelen; /* max length of freezemsg */
+
+ /* revision register shadow */
+ u64 revision;
+ /* Base GUID for device (network order) */
+ u64 base_guid;
+
+ /* these are the "32 bit" regs */
+
+ /* value we put in kr_rcvhdrsize */
+ u32 rcvhdrsize;
+ /* number of receive contexts the chip supports */
+ u32 chip_rcv_contexts;
+ /* number of receive array entries */
+ u32 chip_rcv_array_count;
+ /* number of PIO send contexts the chip supports */
+ u32 chip_send_contexts;
+ /* number of bytes in the PIO memory buffer */
+ u32 chip_pio_mem_size;
+ /* number of bytes in the SDMA memory buffer */
+ u32 chip_sdma_mem_size;
+
+ /* size of each rcvegrbuffer */
+ u32 rcvegrbufsize;
+ /* log2 of above */
+ u16 rcvegrbufsize_shift;
+ /* both sides of the PCIe link are gen3 capable */
+ u8 link_gen3_capable;
+ /* localbus width (1, 2,4,8,16,32) from config space */
+ u32 lbus_width;
+ /* localbus speed in MHz */
+ u32 lbus_speed;
+ int unit; /* unit # of this chip */
+ int node; /* home node of this chip */
+
+ /* save these PCI fields to restore after a reset */
+ u32 pcibar0;
+ u32 pcibar1;
+ u32 pci_rom;
+ u16 pci_command;
+ u16 pcie_devctl;
+ u16 pcie_lnkctl;
+ u16 pcie_devctl2;
+ u32 pci_msix0;
+ u32 pci_lnkctl3;
+ u32 pci_tph2;
+
+ /*
+ * ASCII serial number, from flash, large enough for original
+ * all digit strings, and longer serial number format
+ */
+ u8 serial[SERIAL_MAX];
+ /* human readable board version */
+ u8 boardversion[BOARD_VERS_MAX];
+ u8 lbus_info[32]; /* human readable localbus info */
+ /* chip major rev, from CceRevision */
+ u8 majrev;
+ /* chip minor rev, from CceRevision */
+ u8 minrev;
+ /* hardware ID */
+ u8 hfi1_id;
+ /* implementation code */
+ u8 icode;
+ /* default link down value (poll/sleep) */
+ u8 link_default;
+ /* vAU of this device */
+ u8 vau;
+ /* vCU of this device */
+ u8 vcu;
+ /* link credits of this device */
+ u16 link_credits;
+ /* initial vl15 credits to use */
+ u16 vl15_init;
+
+ /* Misc small ints */
+ /* Number of physical ports available */
+ u8 num_pports;
+ /* Lowest context number which can be used by user processes */
+ u8 first_user_ctxt;
+ u8 n_krcv_queues;
+ u8 qos_shift;
+ u8 qpn_mask;
+
+ u16 rhf_offset; /* offset of RHF within receive header entry */
+ u16 irev; /* implementation revision */
+ u16 dc8051_ver; /* 8051 firmware version */
+
+ struct platform_config_cache pcfg_cache;
+ /* control high-level access to qsfp */
+ struct mutex qsfp_i2c_mutex;
+
+ struct diag_client *diag_client;
+ spinlock_t hfi1_diag_trans_lock; /* protect diag observer ops */
+
+ u8 psxmitwait_supported;
+ /* cycle length of PS* counters in HW (in picoseconds) */
+ u16 psxmitwait_check_rate;
+ /* high volume overflow errors deferred to tasklet */
+ struct tasklet_struct error_tasklet;
+ /* per device cq worker */
+ struct kthread_worker *worker;
+
+ /* MSI-X information */
+ struct hfi1_msix_entry *msix_entries;
+ u32 num_msix_entries;
+
+ /* INTx information */
+ u32 requested_intx_irq; /* did we request one? */
+ char intx_name[MAX_NAME_SIZE]; /* INTx name */
+
+ /* general interrupt: mask of handled interrupts */
+ u64 gi_mask[CCE_NUM_INT_CSRS];
+
+ struct rcv_array_data rcv_entries;
+
+ /*
+ * 64 bit synthetic counters
+ */
+ struct timer_list synth_stats_timer;
+
+ /*
+ * device counters
+ */
+ char *cntrnames;
+ size_t cntrnameslen;
+ size_t ndevcntrs;
+ u64 *cntrs;
+ u64 *scntrs;
+
+ /*
+ * remembered values for synthetic counters
+ */
+ u64 last_tx;
+ u64 last_rx;
+
+ /*
+ * per-port counters
+ */
+ size_t nportcntrs;
+ char *portcntrnames;
+ size_t portcntrnameslen;
+
+ struct hfi1_snoop_data hfi1_snoop;
+
+ struct err_info_rcvport err_info_rcvport;
+ struct err_info_constraint err_info_rcv_constraint;
+ struct err_info_constraint err_info_xmit_constraint;
+ u8 err_info_uncorrectable;
+ u8 err_info_fmconfig;
+
+ atomic_t drop_packet;
+ u8 do_drop;
+
+ /* receive interrupt functions */
+ rhf_rcv_function_ptr *rhf_rcv_function_map;
+ rhf_rcv_function_ptr normal_rhf_rcv_functions[8];
+
+ /*
+ * Handlers for outgoing data so that snoop/capture does not
+ * have to have its hooks in the send path
+ */
+ int (*process_pio_send)(struct hfi1_qp *qp, struct ahg_ib_header *ibhdr,
+ u32 hdrwords, struct hfi1_sge_state *ss,
+ u32 len, u32 plen, u32 dwords, u64 pbc);
+ int (*process_dma_send)(struct hfi1_qp *qp, struct ahg_ib_header *ibhdr,
+ u32 hdrwords, struct hfi1_sge_state *ss,
+ u32 len, u32 plen, u32 dwords, u64 pbc);
+ void (*pio_inline_send)(struct hfi1_devdata *dd, struct pio_buf *pbuf,
+ u64 pbc, const void *from, size_t count);
+
+ /* OUI comes from the HW. Used everywhere as 3 separate bytes. */
+ u8 oui1;
+ u8 oui2;
+ u8 oui3;
+ /* Timer and counter used to detect RcvBufOvflCnt changes */
+ struct timer_list rcverr_timer;
+ u32 rcv_ovfl_cnt;
+
+ int assigned_node_id;
+ wait_queue_head_t event_queue;
+
+ /* Save the enabled LCB error bits */
+ u64 lcb_err_en;
+ u8 dc_shutdown;
+};
+
+/* 8051 firmware version helper */
+#define dc8051_ver(a, b) ((a) << 8 | (b))
+
+/* f_put_tid types */
+#define PT_EXPECTED 0
+#define PT_EAGER 1
+#define PT_INVALID 2
+
+/* Private data for file operations */
+struct hfi1_filedata {
+ struct hfi1_ctxtdata *uctxt;
+ unsigned subctxt;
+ struct hfi1_user_sdma_comp_q *cq;
+ struct hfi1_user_sdma_pkt_q *pq;
+ /* for cpu affinity; -1 if none */
+ int rec_cpu_num;
+};
+
+extern struct list_head hfi1_dev_list;
+extern spinlock_t hfi1_devs_lock;
+struct hfi1_devdata *hfi1_lookup(int unit);
+extern u32 hfi1_cpulist_count;
+extern unsigned long *hfi1_cpulist;
+
+extern unsigned int snoop_drop_send;
+extern unsigned int snoop_force_capture;
+int hfi1_init(struct hfi1_devdata *, int);
+int hfi1_count_units(int *npresentp, int *nupp);
+int hfi1_count_active_units(void);
+
+int hfi1_diag_add(struct hfi1_devdata *);
+void hfi1_diag_remove(struct hfi1_devdata *);
+void handle_linkup_change(struct hfi1_devdata *dd, u32 linkup);
+
+void handle_user_interrupt(struct hfi1_ctxtdata *rcd);
+
+int hfi1_create_rcvhdrq(struct hfi1_devdata *, struct hfi1_ctxtdata *);
+int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *);
+int hfi1_create_ctxts(struct hfi1_devdata *dd);
+struct hfi1_ctxtdata *hfi1_create_ctxtdata(struct hfi1_pportdata *, u32);
+void hfi1_init_pportdata(struct pci_dev *, struct hfi1_pportdata *,
+ struct hfi1_devdata *, u8, u8);
+void hfi1_free_ctxtdata(struct hfi1_devdata *, struct hfi1_ctxtdata *);
+
+void handle_receive_interrupt(struct hfi1_ctxtdata *);
+void handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd);
+void handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd);
+int hfi1_reset_device(int);
+
+/* return the driver's idea of the logical OPA port state */
+static inline u32 driver_lstate(struct hfi1_pportdata *ppd)
+{
+ return ppd->lstate; /* use the cached value */
+}
+
+static inline u16 generate_jkey(kuid_t uid)
+{
+ return from_kuid(current_user_ns(), uid) & 0xffff;
+}
+
+/*
+ * active_egress_rate
+ *
+ * returns the active egress rate in units of [10^6 bits/sec]
+ */
+static inline u32 active_egress_rate(struct hfi1_pportdata *ppd)
+{
+ u16 link_speed = ppd->link_speed_active;
+ u16 link_width = ppd->link_width_active;
+ u32 egress_rate;
+
+ if (link_speed == OPA_LINK_SPEED_25G)
+ egress_rate = 25000;
+ else /* assume OPA_LINK_SPEED_12_5G */
+ egress_rate = 12500;
+
+ switch (link_width) {
+ case OPA_LINK_WIDTH_4X:
+ egress_rate *= 4;
+ break;
+ case OPA_LINK_WIDTH_3X:
+ egress_rate *= 3;
+ break;
+ case OPA_LINK_WIDTH_2X:
+ egress_rate *= 2;
+ break;
+ default:
+ /* assume IB_WIDTH_1X */
+ break;
+ }
+
+ return egress_rate;
+}
+
+/*
+ * egress_cycles
+ *
+ * Returns the number of 'fabric clock cycles' to egress a packet
+ * of length 'len' bytes, at 'rate' Mbit/s. Since the fabric clock
+ * rate is (approximately) 805 MHz, the units of the returned value
+ * are (1/805 MHz).
+ */
+static inline u32 egress_cycles(u32 len, u32 rate)
+{
+ u32 cycles;
+
+ /*
+ * cycles is:
+ *
+ * (length) [bits] / (rate) [bits/sec]
+ * ---------------------------------------------------
+ * fabric_clock_period == 1 /(805 * 10^6) [cycles/sec]
+ */
+
+ cycles = len * 8; /* bits */
+ cycles *= 805;
+ cycles /= rate;
+
+ return cycles;
+}
+
+void set_link_ipg(struct hfi1_pportdata *ppd);
+void process_becn(struct hfi1_pportdata *ppd, u8 sl, u16 rlid, u32 lqpn,
+ u32 rqpn, u8 svc_type);
+void return_cnp(struct hfi1_ibport *ibp, struct hfi1_qp *qp, u32 remote_qpn,
+ u32 pkey, u32 slid, u32 dlid, u8 sc5,
+ const struct ib_grh *old_grh);
+
+#define PACKET_EGRESS_TIMEOUT 350
+static inline void pause_for_credit_return(struct hfi1_devdata *dd)
+{
+ /* Pause at least 1us, to ensure chip returns all credits */
+ u32 usec = cclock_to_ns(dd, PACKET_EGRESS_TIMEOUT) / 1000;
+
+ udelay(usec ? usec : 1);
+}
+
+/**
+ * sc_to_vlt() reverse lookup sc to vl
+ * @dd - devdata
+ * @sc5 - 5 bit sc
+ */
+static inline u8 sc_to_vlt(struct hfi1_devdata *dd, u8 sc5)
+{
+ unsigned seq;
+ u8 rval;
+
+ if (sc5 >= OPA_MAX_SCS)
+ return (u8)(0xff);
+
+ do {
+ seq = read_seqbegin(&dd->sc2vl_lock);
+ rval = *(((u8 *)dd->sc2vl) + sc5);
+ } while (read_seqretry(&dd->sc2vl_lock, seq));
+
+ return rval;
+}
+
+#define PKEY_MEMBER_MASK 0x8000
+#define PKEY_LOW_15_MASK 0x7fff
+
+/*
+ * ingress_pkey_matches_entry - return 1 if the pkey matches ent (ent
+ * being an entry from the ingress partition key table), return 0
+ * otherwise. Use the matching criteria for ingress partition keys
+ * specified in the OPAv1 spec., section 9.10.14.
+ */
+static inline int ingress_pkey_matches_entry(u16 pkey, u16 ent)
+{
+ u16 mkey = pkey & PKEY_LOW_15_MASK;
+ u16 ment = ent & PKEY_LOW_15_MASK;
+
+ if (mkey == ment) {
+ /*
+ * If pkey[15] is clear (limited partition member),
+ * is bit 15 in the corresponding table element
+ * clear (limited member)?
+ */
+ if (!(pkey & PKEY_MEMBER_MASK))
+ return !!(ent & PKEY_MEMBER_MASK);
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * ingress_pkey_table_search - search the entire pkey table for
+ * an entry which matches 'pkey'. return 0 if a match is found,
+ * and 1 otherwise.
+ */
+static int ingress_pkey_table_search(struct hfi1_pportdata *ppd, u16 pkey)
+{
+ int i;
+
+ for (i = 0; i < MAX_PKEY_VALUES; i++) {
+ if (ingress_pkey_matches_entry(pkey, ppd->pkeys[i]))
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * ingress_pkey_table_fail - record a failure of ingress pkey validation,
+ * i.e., increment port_rcv_constraint_errors for the port, and record
+ * the 'error info' for this failure.
+ */
+static void ingress_pkey_table_fail(struct hfi1_pportdata *ppd, u16 pkey,
+ u16 slid)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+
+ incr_cntr64(&ppd->port_rcv_constraint_errors);
+ if (!(dd->err_info_rcv_constraint.status & OPA_EI_STATUS_SMASK)) {
+ dd->err_info_rcv_constraint.status |= OPA_EI_STATUS_SMASK;
+ dd->err_info_rcv_constraint.slid = slid;
+ dd->err_info_rcv_constraint.pkey = pkey;
+ }
+}
+
+/*
+ * ingress_pkey_check - Return 0 if the ingress pkey is valid, return 1
+ * otherwise. Use the criteria in the OPAv1 spec, section 9.10.14. idx
+ * is a hint as to the best place in the partition key table to begin
+ * searching. This function should not be called on the data path because
+ * of performance reasons. On datapath pkey check is expected to be done
+ * by HW and rcv_pkey_check function should be called instead.
+ */
+static inline int ingress_pkey_check(struct hfi1_pportdata *ppd, u16 pkey,
+ u8 sc5, u8 idx, u16 slid)
+{
+ if (!(ppd->part_enforce & HFI1_PART_ENFORCE_IN))
+ return 0;
+
+ /* If SC15, pkey[0:14] must be 0x7fff */
+ if ((sc5 == 0xf) && ((pkey & PKEY_LOW_15_MASK) != PKEY_LOW_15_MASK))
+ goto bad;
+
+ /* Is the pkey = 0x0, or 0x8000? */
+ if ((pkey & PKEY_LOW_15_MASK) == 0)
+ goto bad;
+
+ /* The most likely matching pkey has index 'idx' */
+ if (ingress_pkey_matches_entry(pkey, ppd->pkeys[idx]))
+ return 0;
+
+ /* no match - try the whole table */
+ if (!ingress_pkey_table_search(ppd, pkey))
+ return 0;
+
+bad:
+ ingress_pkey_table_fail(ppd, pkey, slid);
+ return 1;
+}
+
+/*
+ * rcv_pkey_check - Return 0 if the ingress pkey is valid, return 1
+ * otherwise. It only ensures pkey is vlid for QP0. This function
+ * should be called on the data path instead of ingress_pkey_check
+ * as on data path, pkey check is done by HW (except for QP0).
+ */
+static inline int rcv_pkey_check(struct hfi1_pportdata *ppd, u16 pkey,
+ u8 sc5, u16 slid)
+{
+ if (!(ppd->part_enforce & HFI1_PART_ENFORCE_IN))
+ return 0;
+
+ /* If SC15, pkey[0:14] must be 0x7fff */
+ if ((sc5 == 0xf) && ((pkey & PKEY_LOW_15_MASK) != PKEY_LOW_15_MASK))
+ goto bad;
+
+ return 0;
+bad:
+ ingress_pkey_table_fail(ppd, pkey, slid);
+ return 1;
+}
+
+/* MTU handling */
+
+/* MTU enumeration, 256-4k match IB */
+#define OPA_MTU_0 0
+#define OPA_MTU_256 1
+#define OPA_MTU_512 2
+#define OPA_MTU_1024 3
+#define OPA_MTU_2048 4
+#define OPA_MTU_4096 5
+
+u32 lrh_max_header_bytes(struct hfi1_devdata *dd);
+int mtu_to_enum(u32 mtu, int default_if_bad);
+u16 enum_to_mtu(int);
+static inline int valid_ib_mtu(unsigned int mtu)
+{
+ return mtu == 256 || mtu == 512 ||
+ mtu == 1024 || mtu == 2048 ||
+ mtu == 4096;
+}
+static inline int valid_opa_max_mtu(unsigned int mtu)
+{
+ return mtu >= 2048 &&
+ (valid_ib_mtu(mtu) || mtu == 8192 || mtu == 10240);
+}
+
+int set_mtu(struct hfi1_pportdata *);
+
+int hfi1_set_lid(struct hfi1_pportdata *, u32, u8);
+void hfi1_disable_after_error(struct hfi1_devdata *);
+int hfi1_set_uevent_bits(struct hfi1_pportdata *, const int);
+int hfi1_rcvbuf_validate(u32, u8, u16 *);
+
+int fm_get_table(struct hfi1_pportdata *, int, void *);
+int fm_set_table(struct hfi1_pportdata *, int, void *);
+
+void set_up_vl15(struct hfi1_devdata *dd, u8 vau, u16 vl15buf);
+void reset_link_credits(struct hfi1_devdata *dd);
+void assign_remote_cm_au_table(struct hfi1_devdata *dd, u8 vcu);
+
+int snoop_recv_handler(struct hfi1_packet *packet);
+int snoop_send_dma_handler(struct hfi1_qp *qp, struct ahg_ib_header *ibhdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc);
+int snoop_send_pio_handler(struct hfi1_qp *qp, struct ahg_ib_header *ibhdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc);
+void snoop_inline_pio_send(struct hfi1_devdata *dd, struct pio_buf *pbuf,
+ u64 pbc, const void *from, size_t count);
+
+/* for use in system calls, where we want to know device type, etc. */
+#define ctxt_fp(fp) \
+ (((struct hfi1_filedata *)(fp)->private_data)->uctxt)
+#define subctxt_fp(fp) \
+ (((struct hfi1_filedata *)(fp)->private_data)->subctxt)
+#define tidcursor_fp(fp) \
+ (((struct hfi1_filedata *)(fp)->private_data)->tidcursor)
+#define user_sdma_pkt_fp(fp) \
+ (((struct hfi1_filedata *)(fp)->private_data)->pq)
+#define user_sdma_comp_fp(fp) \
+ (((struct hfi1_filedata *)(fp)->private_data)->cq)
+
+static inline struct hfi1_devdata *dd_from_ppd(struct hfi1_pportdata *ppd)
+{
+ return ppd->dd;
+}
+
+static inline struct hfi1_devdata *dd_from_dev(struct hfi1_ibdev *dev)
+{
+ return container_of(dev, struct hfi1_devdata, verbs_dev);
+}
+
+static inline struct hfi1_devdata *dd_from_ibdev(struct ib_device *ibdev)
+{
+ return dd_from_dev(to_idev(ibdev));
+}
+
+static inline struct hfi1_pportdata *ppd_from_ibp(struct hfi1_ibport *ibp)
+{
+ return container_of(ibp, struct hfi1_pportdata, ibport_data);
+}
+
+static inline struct hfi1_ibport *to_iport(struct ib_device *ibdev, u8 port)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ unsigned pidx = port - 1; /* IB number port from 1, hdw from 0 */
+
+ WARN_ON(pidx >= dd->num_pports);
+ return &dd->pport[pidx].ibport_data;
+}
+
+/*
+ * Return the indexed PKEY from the port PKEY table.
+ */
+static inline u16 hfi1_get_pkey(struct hfi1_ibport *ibp, unsigned index)
+{
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u16 ret;
+
+ if (index >= ARRAY_SIZE(ppd->pkeys))
+ ret = 0;
+ else
+ ret = ppd->pkeys[index];
+
+ return ret;
+}
+
+/*
+ * Readers of cc_state must call get_cc_state() under rcu_read_lock().
+ * Writers of cc_state must call get_cc_state() under cc_state_lock.
+ */
+static inline struct cc_state *get_cc_state(struct hfi1_pportdata *ppd)
+{
+ return rcu_dereference(ppd->cc_state);
+}
+
+/*
+ * values for dd->flags (_device_ related flags)
+ */
+#define HFI1_INITTED 0x1 /* chip and driver up and initted */
+#define HFI1_PRESENT 0x2 /* chip accesses can be done */
+#define HFI1_FROZEN 0x4 /* chip in SPC freeze */
+#define HFI1_HAS_SDMA_TIMEOUT 0x8
+#define HFI1_HAS_SEND_DMA 0x10 /* Supports Send DMA */
+#define HFI1_FORCED_FREEZE 0x80 /* driver forced freeze mode */
+#define HFI1_DO_INIT_ASIC 0x100 /* This device will init the ASIC */
+
+/* IB dword length mask in PBC (lower 11 bits); same for all chips */
+#define HFI1_PBC_LENGTH_MASK ((1 << 11) - 1)
+
+
+/* ctxt_flag bit offsets */
+ /* context has been setup */
+#define HFI1_CTXT_SETUP_DONE 1
+ /* waiting for a packet to arrive */
+#define HFI1_CTXT_WAITING_RCV 2
+ /* master has not finished initializing */
+#define HFI1_CTXT_MASTER_UNINIT 4
+ /* waiting for an urgent packet to arrive */
+#define HFI1_CTXT_WAITING_URG 5
+
+/* free up any allocated data at closes */
+struct hfi1_devdata *hfi1_init_dd(struct pci_dev *,
+ const struct pci_device_id *);
+void hfi1_free_devdata(struct hfi1_devdata *);
+void cc_state_reclaim(struct rcu_head *rcu);
+struct hfi1_devdata *hfi1_alloc_devdata(struct pci_dev *pdev, size_t extra);
+
+/*
+ * Set LED override, only the two LSBs have "public" meaning, but
+ * any non-zero value substitutes them for the Link and LinkTrain
+ * LED states.
+ */
+#define HFI1_LED_PHYS 1 /* Physical (linktraining) GREEN LED */
+#define HFI1_LED_LOG 2 /* Logical (link) YELLOW LED */
+void hfi1_set_led_override(struct hfi1_pportdata *ppd, unsigned int val);
+
+#define HFI1_CREDIT_RETURN_RATE (100)
+
+/*
+ * The number of words for the KDETH protocol field. If this is
+ * larger then the actual field used, then part of the payload
+ * will be in the header.
+ *
+ * Optimally, we want this sized so that a typical case will
+ * use full cache lines. The typical local KDETH header would
+ * be:
+ *
+ * Bytes Field
+ * 8 LRH
+ * 12 BHT
+ * ?? KDETH
+ * 8 RHF
+ * ---
+ * 28 + KDETH
+ *
+ * For a 64-byte cache line, KDETH would need to be 36 bytes or 9 DWORDS
+ */
+#define DEFAULT_RCVHDRSIZE 9
+
+/*
+ * Maximal header byte count:
+ *
+ * Bytes Field
+ * 8 LRH
+ * 40 GRH (optional)
+ * 12 BTH
+ * ?? KDETH
+ * 8 RHF
+ * ---
+ * 68 + KDETH
+ *
+ * We also want to maintain a cache line alignment to assist DMA'ing
+ * of the header bytes. Round up to a good size.
+ */
+#define DEFAULT_RCVHDR_ENTSIZE 32
+
+int hfi1_get_user_pages(unsigned long, size_t, struct page **);
+void hfi1_release_user_pages(struct page **, size_t);
+
+static inline void clear_rcvhdrtail(const struct hfi1_ctxtdata *rcd)
+{
+ *((u64 *) rcd->rcvhdrtail_kvaddr) = 0ULL;
+}
+
+static inline u32 get_rcvhdrtail(const struct hfi1_ctxtdata *rcd)
+{
+ /*
+ * volatile because it's a DMA target from the chip, routine is
+ * inlined, and don't want register caching or reordering.
+ */
+ return (u32) le64_to_cpu(*rcd->rcvhdrtail_kvaddr);
+}
+
+/*
+ * sysfs interface.
+ */
+
+extern const char ib_hfi1_version[];
+
+int hfi1_device_create(struct hfi1_devdata *);
+void hfi1_device_remove(struct hfi1_devdata *);
+
+int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
+ struct kobject *kobj);
+int hfi1_verbs_register_sysfs(struct hfi1_devdata *);
+void hfi1_verbs_unregister_sysfs(struct hfi1_devdata *);
+/* Hook for sysfs read of QSFP */
+int qsfp_dump(struct hfi1_pportdata *ppd, char *buf, int len);
+
+int hfi1_pcie_init(struct pci_dev *, const struct pci_device_id *);
+void hfi1_pcie_cleanup(struct pci_dev *);
+int hfi1_pcie_ddinit(struct hfi1_devdata *, struct pci_dev *,
+ const struct pci_device_id *);
+void hfi1_pcie_ddcleanup(struct hfi1_devdata *);
+void hfi1_pcie_flr(struct hfi1_devdata *);
+int pcie_speeds(struct hfi1_devdata *);
+void request_msix(struct hfi1_devdata *, u32 *, struct hfi1_msix_entry *);
+void hfi1_enable_intx(struct pci_dev *);
+void hfi1_nomsix(struct hfi1_devdata *);
+void restore_pci_variables(struct hfi1_devdata *dd);
+int do_pcie_gen3_transition(struct hfi1_devdata *dd);
+int parse_platform_config(struct hfi1_devdata *dd);
+int get_platform_config_field(struct hfi1_devdata *dd,
+ enum platform_config_table_type_encoding table_type,
+ int table_index, int field_index, u32 *data, u32 len);
+
+dma_addr_t hfi1_map_page(struct pci_dev *, struct page *, unsigned long,
+ size_t, int);
+const char *get_unit_name(int unit);
+
+/*
+ * Flush write combining store buffers (if present) and perform a write
+ * barrier.
+ */
+static inline void flush_wc(void)
+{
+ asm volatile("sfence" : : : "memory");
+}
+
+void handle_eflags(struct hfi1_packet *packet);
+int process_receive_ib(struct hfi1_packet *packet);
+int process_receive_bypass(struct hfi1_packet *packet);
+int process_receive_error(struct hfi1_packet *packet);
+int kdeth_process_expected(struct hfi1_packet *packet);
+int kdeth_process_eager(struct hfi1_packet *packet);
+int process_receive_invalid(struct hfi1_packet *packet);
+
+extern rhf_rcv_function_ptr snoop_rhf_rcv_functions[8];
+
+void update_sge(struct hfi1_sge_state *ss, u32 length);
+
+/* global module parameter variables */
+extern unsigned int hfi1_max_mtu;
+extern unsigned int hfi1_cu;
+extern unsigned int user_credit_return_threshold;
+extern uint num_rcv_contexts;
+extern unsigned n_krcvqs;
+extern u8 krcvqs[];
+extern int krcvqsset;
+extern uint kdeth_qp;
+extern uint loopback;
+extern uint quick_linkup;
+extern uint rcv_intr_timeout;
+extern uint rcv_intr_count;
+extern uint rcv_intr_dynamic;
+extern ushort link_crc_mask;
+
+extern struct mutex hfi1_mutex;
+
+/* Number of seconds before our card status check... */
+#define STATUS_TIMEOUT 60
+
+#define DRIVER_NAME "hfi1"
+#define HFI1_USER_MINOR_BASE 0
+#define HFI1_TRACE_MINOR 127
+#define HFI1_DIAGPKT_MINOR 128
+#define HFI1_DIAG_MINOR_BASE 129
+#define HFI1_SNOOP_CAPTURE_BASE 200
+#define HFI1_NMINORS 255
+
+#define PCI_VENDOR_ID_INTEL 0x8086
+#define PCI_DEVICE_ID_INTEL0 0x24f0
+#define PCI_DEVICE_ID_INTEL1 0x24f1
+
+#define HFI1_PKT_USER_SC_INTEGRITY \
+ (SEND_CTXT_CHECK_ENABLE_DISALLOW_NON_KDETH_PACKETS_SMASK \
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_BYPASS_SMASK \
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_GRH_SMASK)
+
+#define HFI1_PKT_KERNEL_SC_INTEGRITY \
+ (SEND_CTXT_CHECK_ENABLE_DISALLOW_KDETH_PACKETS_SMASK)
+
+static inline u64 hfi1_pkt_default_send_ctxt_mask(struct hfi1_devdata *dd,
+ u16 ctxt_type)
+{
+ u64 base_sc_integrity =
+ SEND_CTXT_CHECK_ENABLE_DISALLOW_BYPASS_BAD_PKT_LEN_SMASK
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_PBC_STATIC_RATE_CONTROL_SMASK
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_TOO_LONG_BYPASS_PACKETS_SMASK
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_TOO_LONG_IB_PACKETS_SMASK
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_BAD_PKT_LEN_SMASK
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_PBC_TEST_SMASK
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_TOO_SMALL_BYPASS_PACKETS_SMASK
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_TOO_SMALL_IB_PACKETS_SMASK
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_RAW_IPV6_SMASK
+ | SEND_CTXT_CHECK_ENABLE_DISALLOW_RAW_SMASK
+ | SEND_CTXT_CHECK_ENABLE_CHECK_BYPASS_VL_MAPPING_SMASK
+ | SEND_CTXT_CHECK_ENABLE_CHECK_VL_MAPPING_SMASK
+ | SEND_CTXT_CHECK_ENABLE_CHECK_OPCODE_SMASK
+ | SEND_CTXT_CHECK_ENABLE_CHECK_SLID_SMASK
+ | SEND_CTXT_CHECK_ENABLE_CHECK_JOB_KEY_SMASK
+ | SEND_CTXT_CHECK_ENABLE_CHECK_VL_SMASK
+ | SEND_CTXT_CHECK_ENABLE_CHECK_ENABLE_SMASK;
+
+ if (ctxt_type == SC_USER)
+ base_sc_integrity |= HFI1_PKT_USER_SC_INTEGRITY;
+ else
+ base_sc_integrity |= HFI1_PKT_KERNEL_SC_INTEGRITY;
+
+ if (is_a0(dd))
+ /* turn off send-side job key checks - A0 erratum */
+ return base_sc_integrity &
+ ~SEND_CTXT_CHECK_ENABLE_CHECK_JOB_KEY_SMASK;
+ return base_sc_integrity;
+}
+
+static inline u64 hfi1_pkt_base_sdma_integrity(struct hfi1_devdata *dd)
+{
+ u64 base_sdma_integrity =
+ SEND_DMA_CHECK_ENABLE_DISALLOW_BYPASS_BAD_PKT_LEN_SMASK
+ | SEND_DMA_CHECK_ENABLE_DISALLOW_PBC_STATIC_RATE_CONTROL_SMASK
+ | SEND_DMA_CHECK_ENABLE_DISALLOW_TOO_LONG_BYPASS_PACKETS_SMASK
+ | SEND_DMA_CHECK_ENABLE_DISALLOW_TOO_LONG_IB_PACKETS_SMASK
+ | SEND_DMA_CHECK_ENABLE_DISALLOW_BAD_PKT_LEN_SMASK
+ | SEND_DMA_CHECK_ENABLE_DISALLOW_TOO_SMALL_BYPASS_PACKETS_SMASK
+ | SEND_DMA_CHECK_ENABLE_DISALLOW_TOO_SMALL_IB_PACKETS_SMASK
+ | SEND_DMA_CHECK_ENABLE_DISALLOW_RAW_IPV6_SMASK
+ | SEND_DMA_CHECK_ENABLE_DISALLOW_RAW_SMASK
+ | SEND_DMA_CHECK_ENABLE_CHECK_BYPASS_VL_MAPPING_SMASK
+ | SEND_DMA_CHECK_ENABLE_CHECK_VL_MAPPING_SMASK
+ | SEND_DMA_CHECK_ENABLE_CHECK_OPCODE_SMASK
+ | SEND_DMA_CHECK_ENABLE_CHECK_SLID_SMASK
+ | SEND_DMA_CHECK_ENABLE_CHECK_JOB_KEY_SMASK
+ | SEND_DMA_CHECK_ENABLE_CHECK_VL_SMASK
+ | SEND_DMA_CHECK_ENABLE_CHECK_ENABLE_SMASK;
+
+ if (is_a0(dd))
+ /* turn off send-side job key checks - A0 erratum */
+ return base_sdma_integrity &
+ ~SEND_DMA_CHECK_ENABLE_CHECK_JOB_KEY_SMASK;
+ return base_sdma_integrity;
+}
+
+/*
+ * hfi1_early_err is used (only!) to print early errors before devdata is
+ * allocated, or when dd->pcidev may not be valid, and at the tail end of
+ * cleanup when devdata may have been freed, etc. hfi1_dev_porterr is
+ * the same as dd_dev_err, but is used when the message really needs
+ * the IB port# to be definitive as to what's happening..
+ */
+#define hfi1_early_err(dev, fmt, ...) \
+ dev_err(dev, fmt, ##__VA_ARGS__)
+
+#define hfi1_early_info(dev, fmt, ...) \
+ dev_info(dev, fmt, ##__VA_ARGS__)
+
+#define dd_dev_emerg(dd, fmt, ...) \
+ dev_emerg(&(dd)->pcidev->dev, "%s: " fmt, \
+ get_unit_name((dd)->unit), ##__VA_ARGS__)
+#define dd_dev_err(dd, fmt, ...) \
+ dev_err(&(dd)->pcidev->dev, "%s: " fmt, \
+ get_unit_name((dd)->unit), ##__VA_ARGS__)
+#define dd_dev_warn(dd, fmt, ...) \
+ dev_warn(&(dd)->pcidev->dev, "%s: " fmt, \
+ get_unit_name((dd)->unit), ##__VA_ARGS__)
+
+#define dd_dev_warn_ratelimited(dd, fmt, ...) \
+ dev_warn_ratelimited(&(dd)->pcidev->dev, "%s: " fmt, \
+ get_unit_name((dd)->unit), ##__VA_ARGS__)
+
+#define dd_dev_info(dd, fmt, ...) \
+ dev_info(&(dd)->pcidev->dev, "%s: " fmt, \
+ get_unit_name((dd)->unit), ##__VA_ARGS__)
+
+#define hfi1_dev_porterr(dd, port, fmt, ...) \
+ dev_err(&(dd)->pcidev->dev, "%s: IB%u:%u " fmt, \
+ get_unit_name((dd)->unit), (dd)->unit, (port), \
+ ##__VA_ARGS__)
+
+/*
+ * this is used for formatting hw error messages...
+ */
+struct hfi1_hwerror_msgs {
+ u64 mask;
+ const char *msg;
+ size_t sz;
+};
+
+/* in intr.c... */
+void hfi1_format_hwerrors(u64 hwerrs,
+ const struct hfi1_hwerror_msgs *hwerrmsgs,
+ size_t nhwerrmsgs, char *msg, size_t lmsg);
+
+#define USER_OPCODE_CHECK_VAL 0xC0
+#define USER_OPCODE_CHECK_MASK 0xC0
+#define OPCODE_CHECK_VAL_DISABLED 0x0
+#define OPCODE_CHECK_MASK_DISABLED 0x0
+
+static inline void hfi1_reset_cpu_counters(struct hfi1_devdata *dd)
+{
+ struct hfi1_pportdata *ppd;
+ int i;
+
+ dd->z_int_counter = get_all_cpu_total(dd->int_counter);
+ dd->z_rcv_limit = get_all_cpu_total(dd->rcv_limit);
+
+ ppd = (struct hfi1_pportdata *)(dd + 1);
+ for (i = 0; i < dd->num_pports; i++, ppd++) {
+ ppd->ibport_data.z_rc_acks =
+ get_all_cpu_total(ppd->ibport_data.rc_acks);
+ ppd->ibport_data.z_rc_qacks =
+ get_all_cpu_total(ppd->ibport_data.rc_qacks);
+ }
+}
+
+/* Control LED state */
+static inline void setextled(struct hfi1_devdata *dd, u32 on)
+{
+ if (on)
+ write_csr(dd, DCC_CFG_LED_CNTRL, 0x1F);
+ else
+ write_csr(dd, DCC_CFG_LED_CNTRL, 0x10);
+}
+
+int hfi1_tempsense_rd(struct hfi1_devdata *dd, struct hfi1_temp *temp);
+
+#endif /* _HFI1_KERNEL_H */
diff --git a/drivers/staging/rdma/hfi1/init.c b/drivers/staging/rdma/hfi1/init.c
new file mode 100644
index 0000000..a877eda
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/init.c
@@ -0,0 +1,1722 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/idr.h>
+#include <linux/module.h>
+#include <linux/printk.h>
+#include <linux/hrtimer.h>
+
+#include "hfi.h"
+#include "device.h"
+#include "common.h"
+#include "mad.h"
+#include "sdma.h"
+#include "debugfs.h"
+#include "verbs.h"
+
+#undef pr_fmt
+#define pr_fmt(fmt) DRIVER_NAME ": " fmt
+
+/*
+ * min buffers we want to have per context, after driver
+ */
+#define HFI1_MIN_USER_CTXT_BUFCNT 7
+
+#define HFI1_MIN_HDRQ_EGRBUF_CNT 2
+#define HFI1_MIN_EAGER_BUFFER_SIZE (4 * 1024) /* 4KB */
+#define HFI1_MAX_EAGER_BUFFER_SIZE (256 * 1024) /* 256KB */
+
+/*
+ * Number of user receive contexts we are configured to use (to allow for more
+ * pio buffers per ctxt, etc.) Zero means use one user context per CPU.
+ */
+uint num_rcv_contexts;
+module_param_named(num_rcv_contexts, num_rcv_contexts, uint, S_IRUGO);
+MODULE_PARM_DESC(
+ num_rcv_contexts, "Set max number of user receive contexts to use");
+
+u8 krcvqs[RXE_NUM_DATA_VL];
+int krcvqsset;
+module_param_array(krcvqs, byte, &krcvqsset, S_IRUGO);
+MODULE_PARM_DESC(krcvqs, "Array of the number of kernel receive queues by VL");
+
+/* computed based on above array */
+unsigned n_krcvqs;
+
+static unsigned hfi1_rcvarr_split = 25;
+module_param_named(rcvarr_split, hfi1_rcvarr_split, uint, S_IRUGO);
+MODULE_PARM_DESC(rcvarr_split, "Percent of context's RcvArray entries used for Eager buffers");
+
+static uint eager_buffer_size = (2 << 20); /* 2MB */
+module_param(eager_buffer_size, uint, S_IRUGO);
+MODULE_PARM_DESC(eager_buffer_size, "Size of the eager buffers, default: 2MB");
+
+static uint rcvhdrcnt = 2048; /* 2x the max eager buffer count */
+module_param_named(rcvhdrcnt, rcvhdrcnt, uint, S_IRUGO);
+MODULE_PARM_DESC(rcvhdrcnt, "Receive header queue count (default 2048)");
+
+static uint hfi1_hdrq_entsize = 32;
+module_param_named(hdrq_entsize, hfi1_hdrq_entsize, uint, S_IRUGO);
+MODULE_PARM_DESC(hdrq_entsize, "Size of header queue entries: 2 - 8B, 16 - 64B (default), 32 - 128B");
+
+unsigned int user_credit_return_threshold = 33; /* default is 33% */
+module_param(user_credit_return_threshold, uint, S_IRUGO);
+MODULE_PARM_DESC(user_credit_return_theshold, "Credit return threshold for user send contexts, return when unreturned credits passes this many blocks (in percent of allocated blocks, 0 is off)");
+
+static inline u64 encode_rcv_header_entry_size(u16);
+
+static struct idr hfi1_unit_table;
+u32 hfi1_cpulist_count;
+unsigned long *hfi1_cpulist;
+
+/*
+ * Common code for creating the receive context array.
+ */
+int hfi1_create_ctxts(struct hfi1_devdata *dd)
+{
+ unsigned i;
+ int ret;
+ int local_node_id = pcibus_to_node(dd->pcidev->bus);
+
+ if (local_node_id < 0)
+ local_node_id = numa_node_id();
+ dd->assigned_node_id = local_node_id;
+
+ dd->rcd = kcalloc(dd->num_rcv_contexts, sizeof(*dd->rcd), GFP_KERNEL);
+ if (!dd->rcd) {
+ dd_dev_err(dd,
+ "Unable to allocate receive context array, failing\n");
+ goto nomem;
+ }
+
+ /* create one or more kernel contexts */
+ for (i = 0; i < dd->first_user_ctxt; ++i) {
+ struct hfi1_pportdata *ppd;
+ struct hfi1_ctxtdata *rcd;
+
+ ppd = dd->pport + (i % dd->num_pports);
+ rcd = hfi1_create_ctxtdata(ppd, i);
+ if (!rcd) {
+ dd_dev_err(dd,
+ "Unable to allocate kernel receive context, failing\n");
+ goto nomem;
+ }
+ /*
+ * Set up the kernel context flags here and now because they
+ * use default values for all receive side memories. User
+ * contexts will be handled as they are created.
+ */
+ rcd->flags = HFI1_CAP_KGET(MULTI_PKT_EGR) |
+ HFI1_CAP_KGET(NODROP_RHQ_FULL) |
+ HFI1_CAP_KGET(NODROP_EGR_FULL) |
+ HFI1_CAP_KGET(DMA_RTAIL);
+ rcd->seq_cnt = 1;
+
+ rcd->sc = sc_alloc(dd, SC_ACK, rcd->rcvhdrqentsize, dd->node);
+ if (!rcd->sc) {
+ dd_dev_err(dd,
+ "Unable to allocate kernel send context, failing\n");
+ dd->rcd[rcd->ctxt] = NULL;
+ hfi1_free_ctxtdata(dd, rcd);
+ goto nomem;
+ }
+
+ ret = hfi1_init_ctxt(rcd->sc);
+ if (ret < 0) {
+ dd_dev_err(dd,
+ "Failed to setup kernel receive context, failing\n");
+ sc_free(rcd->sc);
+ dd->rcd[rcd->ctxt] = NULL;
+ hfi1_free_ctxtdata(dd, rcd);
+ ret = -EFAULT;
+ goto bail;
+ }
+ }
+
+ return 0;
+nomem:
+ ret = -ENOMEM;
+bail:
+ kfree(dd->rcd);
+ dd->rcd = NULL;
+ return ret;
+}
+
+/*
+ * Common code for user and kernel context setup.
+ */
+struct hfi1_ctxtdata *hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, u32 ctxt)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ struct hfi1_ctxtdata *rcd;
+ unsigned kctxt_ngroups = 0;
+ u32 base;
+
+ if (dd->rcv_entries.nctxt_extra >
+ dd->num_rcv_contexts - dd->first_user_ctxt)
+ kctxt_ngroups = (dd->rcv_entries.nctxt_extra -
+ (dd->num_rcv_contexts - dd->first_user_ctxt));
+ rcd = kzalloc(sizeof(*rcd), GFP_KERNEL);
+ if (rcd) {
+ u32 rcvtids, max_entries;
+
+ dd_dev_info(dd, "%s: setting up context %u\n", __func__, ctxt);
+
+ INIT_LIST_HEAD(&rcd->qp_wait_list);
+ rcd->ppd = ppd;
+ rcd->dd = dd;
+ rcd->cnt = 1;
+ rcd->ctxt = ctxt;
+ dd->rcd[ctxt] = rcd;
+ rcd->numa_id = numa_node_id();
+ rcd->rcv_array_groups = dd->rcv_entries.ngroups;
+
+ spin_lock_init(&rcd->exp_lock);
+
+ /*
+ * Calculate the context's RcvArray entry starting point.
+ * We do this here because we have to take into account all
+ * the RcvArray entries that previous context would have
+ * taken and we have to account for any extra groups
+ * assigned to the kernel or user contexts.
+ */
+ if (ctxt < dd->first_user_ctxt) {
+ if (ctxt < kctxt_ngroups) {
+ base = ctxt * (dd->rcv_entries.ngroups + 1);
+ rcd->rcv_array_groups++;
+ } else
+ base = kctxt_ngroups +
+ (ctxt * dd->rcv_entries.ngroups);
+ } else {
+ u16 ct = ctxt - dd->first_user_ctxt;
+
+ base = ((dd->n_krcv_queues * dd->rcv_entries.ngroups) +
+ kctxt_ngroups);
+ if (ct < dd->rcv_entries.nctxt_extra) {
+ base += ct * (dd->rcv_entries.ngroups + 1);
+ rcd->rcv_array_groups++;
+ } else
+ base += dd->rcv_entries.nctxt_extra +
+ (ct * dd->rcv_entries.ngroups);
+ }
+ rcd->eager_base = base * dd->rcv_entries.group_size;
+
+ /* Validate and initialize Rcv Hdr Q variables */
+ if (rcvhdrcnt % HDRQ_INCREMENT) {
+ dd_dev_err(dd,
+ "ctxt%u: header queue count %d must be divisible by %d\n",
+ rcd->ctxt, rcvhdrcnt, HDRQ_INCREMENT);
+ goto bail;
+ }
+ rcd->rcvhdrq_cnt = rcvhdrcnt;
+ rcd->rcvhdrqentsize = hfi1_hdrq_entsize;
+ /*
+ * Simple Eager buffer allocation: we have already pre-allocated
+ * the number of RcvArray entry groups. Each ctxtdata structure
+ * holds the number of groups for that context.
+ *
+ * To follow CSR requirements and maintain cacheline alignment,
+ * make sure all sizes and bases are multiples of group_size.
+ *
+ * The expected entry count is what is left after assigning
+ * eager.
+ */
+ max_entries = rcd->rcv_array_groups *
+ dd->rcv_entries.group_size;
+ rcvtids = ((max_entries * hfi1_rcvarr_split) / 100);
+ rcd->egrbufs.count = round_down(rcvtids,
+ dd->rcv_entries.group_size);
+ if (rcd->egrbufs.count > MAX_EAGER_ENTRIES) {
+ dd_dev_err(dd, "ctxt%u: requested too many RcvArray entries.\n",
+ rcd->ctxt);
+ rcd->egrbufs.count = MAX_EAGER_ENTRIES;
+ }
+ dd_dev_info(dd, "ctxt%u: max Eager buffer RcvArray entries: %u\n",
+ rcd->ctxt, rcd->egrbufs.count);
+
+ /*
+ * Allocate array that will hold the eager buffer accounting
+ * data.
+ * This will allocate the maximum possible buffer count based
+ * on the value of the RcvArray split parameter.
+ * The resulting value will be rounded down to the closest
+ * multiple of dd->rcv_entries.group_size.
+ */
+ rcd->egrbufs.buffers = kzalloc(sizeof(*rcd->egrbufs.buffers) *
+ rcd->egrbufs.count, GFP_KERNEL);
+ if (!rcd->egrbufs.buffers)
+ goto bail;
+ rcd->egrbufs.rcvtids = kzalloc(sizeof(*rcd->egrbufs.rcvtids) *
+ rcd->egrbufs.count, GFP_KERNEL);
+ if (!rcd->egrbufs.rcvtids)
+ goto bail;
+ rcd->egrbufs.size = eager_buffer_size;
+ /*
+ * The size of the buffers programmed into the RcvArray
+ * entries needs to be big enough to handle the highest
+ * MTU supported.
+ */
+ if (rcd->egrbufs.size < hfi1_max_mtu) {
+ rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
+ dd_dev_info(dd,
+ "ctxt%u: eager bufs size too small. Adjusting to %zu\n",
+ rcd->ctxt, rcd->egrbufs.size);
+ }
+ rcd->egrbufs.rcvtid_size = HFI1_MAX_EAGER_BUFFER_SIZE;
+
+ if (ctxt < dd->first_user_ctxt) { /* N/A for PSM contexts */
+ rcd->opstats = kzalloc(sizeof(*rcd->opstats),
+ GFP_KERNEL);
+ if (!rcd->opstats) {
+ dd_dev_err(dd,
+ "ctxt%u: Unable to allocate per ctxt stats buffer\n",
+ rcd->ctxt);
+ goto bail;
+ }
+ }
+ }
+ return rcd;
+bail:
+ kfree(rcd->opstats);
+ kfree(rcd->egrbufs.rcvtids);
+ kfree(rcd->egrbufs.buffers);
+ kfree(rcd);
+ return NULL;
+}
+
+/*
+ * Convert a receive header entry size that to the encoding used in the CSR.
+ *
+ * Return a zero if the given size is invalid.
+ */
+static inline u64 encode_rcv_header_entry_size(u16 size)
+{
+ /* there are only 3 valid receive header entry sizes */
+ if (size == 2)
+ return 1;
+ if (size == 16)
+ return 2;
+ else if (size == 32)
+ return 4;
+ return 0; /* invalid */
+}
+
+/*
+ * Select the largest ccti value over all SLs to determine the intra-
+ * packet gap for the link.
+ *
+ * called with cca_timer_lock held (to protect access to cca_timer
+ * array), and rcu_read_lock() (to protect access to cc_state).
+ */
+void set_link_ipg(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ struct cc_state *cc_state;
+ int i;
+ u16 cce, ccti_limit, max_ccti = 0;
+ u16 shift, mult;
+ u64 src;
+ u32 current_egress_rate; /* Mbits /sec */
+ u32 max_pkt_time;
+ /*
+ * max_pkt_time is the maximum packet egress time in units
+ * of the fabric clock period 1/(805 MHz).
+ */
+
+ cc_state = get_cc_state(ppd);
+
+ if (cc_state == NULL)
+ /*
+ * This should _never_ happen - rcu_read_lock() is held,
+ * and set_link_ipg() should not be called if cc_state
+ * is NULL.
+ */
+ return;
+
+ for (i = 0; i < OPA_MAX_SLS; i++) {
+ u16 ccti = ppd->cca_timer[i].ccti;
+
+ if (ccti > max_ccti)
+ max_ccti = ccti;
+ }
+
+ ccti_limit = cc_state->cct.ccti_limit;
+ if (max_ccti > ccti_limit)
+ max_ccti = ccti_limit;
+
+ cce = cc_state->cct.entries[max_ccti].entry;
+ shift = (cce & 0xc000) >> 14;
+ mult = (cce & 0x3fff);
+
+ current_egress_rate = active_egress_rate(ppd);
+
+ max_pkt_time = egress_cycles(ppd->ibmaxlen, current_egress_rate);
+
+ src = (max_pkt_time >> shift) * mult;
+
+ src &= SEND_STATIC_RATE_CONTROL_CSR_SRC_RELOAD_SMASK;
+ src <<= SEND_STATIC_RATE_CONTROL_CSR_SRC_RELOAD_SHIFT;
+
+ write_csr(dd, SEND_STATIC_RATE_CONTROL, src);
+}
+
+static enum hrtimer_restart cca_timer_fn(struct hrtimer *t)
+{
+ struct cca_timer *cca_timer;
+ struct hfi1_pportdata *ppd;
+ int sl;
+ u16 ccti, ccti_timer, ccti_min;
+ struct cc_state *cc_state;
+
+ cca_timer = container_of(t, struct cca_timer, hrtimer);
+ ppd = cca_timer->ppd;
+ sl = cca_timer->sl;
+
+ rcu_read_lock();
+
+ cc_state = get_cc_state(ppd);
+
+ if (cc_state == NULL) {
+ rcu_read_unlock();
+ return HRTIMER_NORESTART;
+ }
+
+ /*
+ * 1) decrement ccti for SL
+ * 2) calculate IPG for link (set_link_ipg())
+ * 3) restart timer, unless ccti is at min value
+ */
+
+ ccti_min = cc_state->cong_setting.entries[sl].ccti_min;
+ ccti_timer = cc_state->cong_setting.entries[sl].ccti_timer;
+
+ spin_lock(&ppd->cca_timer_lock);
+
+ ccti = cca_timer->ccti;
+
+ if (ccti > ccti_min) {
+ cca_timer->ccti--;
+ set_link_ipg(ppd);
+ }
+
+ spin_unlock(&ppd->cca_timer_lock);
+
+ rcu_read_unlock();
+
+ if (ccti > ccti_min) {
+ unsigned long nsec = 1024 * ccti_timer;
+ /* ccti_timer is in units of 1.024 usec */
+ hrtimer_forward_now(t, ns_to_ktime(nsec));
+ return HRTIMER_RESTART;
+ }
+ return HRTIMER_NORESTART;
+}
+
+/*
+ * Common code for initializing the physical port structure.
+ */
+void hfi1_init_pportdata(struct pci_dev *pdev, struct hfi1_pportdata *ppd,
+ struct hfi1_devdata *dd, u8 hw_pidx, u8 port)
+{
+ int i, size;
+ uint default_pkey_idx;
+
+ ppd->dd = dd;
+ ppd->hw_pidx = hw_pidx;
+ ppd->port = port; /* IB port number, not index */
+
+ default_pkey_idx = 1;
+
+ ppd->pkeys[default_pkey_idx] = DEFAULT_P_KEY;
+ if (loopback) {
+ hfi1_early_err(&pdev->dev,
+ "Faking data partition 0x8001 in idx %u\n",
+ !default_pkey_idx);
+ ppd->pkeys[!default_pkey_idx] = 0x8001;
+ }
+
+ INIT_WORK(&ppd->link_vc_work, handle_verify_cap);
+ INIT_WORK(&ppd->link_up_work, handle_link_up);
+ INIT_WORK(&ppd->link_down_work, handle_link_down);
+ INIT_WORK(&ppd->freeze_work, handle_freeze);
+ INIT_WORK(&ppd->link_downgrade_work, handle_link_downgrade);
+ INIT_WORK(&ppd->sma_message_work, handle_sma_message);
+ INIT_WORK(&ppd->link_bounce_work, handle_link_bounce);
+ mutex_init(&ppd->hls_lock);
+ spin_lock_init(&ppd->sdma_alllock);
+ spin_lock_init(&ppd->qsfp_info.qsfp_lock);
+
+ ppd->sm_trap_qp = 0x0;
+ ppd->sa_qp = 0x1;
+
+ ppd->hfi1_wq = NULL;
+
+ spin_lock_init(&ppd->cca_timer_lock);
+
+ for (i = 0; i < OPA_MAX_SLS; i++) {
+ hrtimer_init(&ppd->cca_timer[i].hrtimer, CLOCK_MONOTONIC,
+ HRTIMER_MODE_REL);
+ ppd->cca_timer[i].ppd = ppd;
+ ppd->cca_timer[i].sl = i;
+ ppd->cca_timer[i].ccti = 0;
+ ppd->cca_timer[i].hrtimer.function = cca_timer_fn;
+ }
+
+ ppd->cc_max_table_entries = IB_CC_TABLE_CAP_DEFAULT;
+
+ spin_lock_init(&ppd->cc_state_lock);
+ spin_lock_init(&ppd->cc_log_lock);
+ size = sizeof(struct cc_state);
+ RCU_INIT_POINTER(ppd->cc_state, kzalloc(size, GFP_KERNEL));
+ if (!rcu_dereference(ppd->cc_state))
+ goto bail;
+ return;
+
+bail:
+
+ hfi1_early_err(&pdev->dev,
+ "Congestion Control Agent disabled for port %d\n", port);
+}
+
+/*
+ * Do initialization for device that is only needed on
+ * first detect, not on resets.
+ */
+static int loadtime_init(struct hfi1_devdata *dd)
+{
+ return 0;
+}
+
+/**
+ * init_after_reset - re-initialize after a reset
+ * @dd: the hfi1_ib device
+ *
+ * sanity check at least some of the values after reset, and
+ * ensure no receive or transmit (explicitly, in case reset
+ * failed
+ */
+static int init_after_reset(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /*
+ * Ensure chip does no sends or receives, tail updates, or
+ * pioavail updates while we re-initialize. This is mostly
+ * for the driver data structures, not chip registers.
+ */
+ for (i = 0; i < dd->num_rcv_contexts; i++)
+ hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS |
+ HFI1_RCVCTRL_INTRAVAIL_DIS |
+ HFI1_RCVCTRL_TAILUPD_DIS, i);
+ pio_send_control(dd, PSC_GLOBAL_DISABLE);
+ for (i = 0; i < dd->num_send_contexts; i++)
+ sc_disable(dd->send_contexts[i].sc);
+
+ return 0;
+}
+
+static void enable_chip(struct hfi1_devdata *dd)
+{
+ u32 rcvmask;
+ u32 i;
+
+ /* enable PIO send */
+ pio_send_control(dd, PSC_GLOBAL_ENABLE);
+
+ /*
+ * Enable kernel ctxts' receive and receive interrupt.
+ * Other ctxts done as user opens and initializes them.
+ */
+ rcvmask = HFI1_RCVCTRL_CTXT_ENB | HFI1_RCVCTRL_INTRAVAIL_ENB;
+ for (i = 0; i < dd->first_user_ctxt; ++i) {
+ rcvmask |= HFI1_CAP_KGET_MASK(dd->rcd[i]->flags, DMA_RTAIL) ?
+ HFI1_RCVCTRL_TAILUPD_ENB : HFI1_RCVCTRL_TAILUPD_DIS;
+ if (!HFI1_CAP_KGET_MASK(dd->rcd[i]->flags, MULTI_PKT_EGR))
+ rcvmask |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB;
+ if (HFI1_CAP_KGET_MASK(dd->rcd[i]->flags, NODROP_RHQ_FULL))
+ rcvmask |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB;
+ if (HFI1_CAP_KGET_MASK(dd->rcd[i]->flags, NODROP_EGR_FULL))
+ rcvmask |= HFI1_RCVCTRL_NO_EGR_DROP_ENB;
+ hfi1_rcvctrl(dd, rcvmask, i);
+ sc_enable(dd->rcd[i]->sc);
+ }
+}
+
+/**
+ * create_workqueues - create per port workqueues
+ * @dd: the hfi1_ib device
+ */
+static int create_workqueues(struct hfi1_devdata *dd)
+{
+ int pidx;
+ struct hfi1_pportdata *ppd;
+
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+ if (!ppd->hfi1_wq) {
+ char wq_name[8]; /* 3 + 2 + 1 + 1 + 1 */
+
+ snprintf(wq_name, sizeof(wq_name), "hfi%d_%d",
+ dd->unit, pidx);
+ ppd->hfi1_wq =
+ create_singlethread_workqueue(wq_name);
+ if (!ppd->hfi1_wq)
+ goto wq_error;
+ }
+ }
+ return 0;
+wq_error:
+ pr_err("create_singlethread_workqueue failed for port %d\n",
+ pidx + 1);
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+ if (ppd->hfi1_wq) {
+ destroy_workqueue(ppd->hfi1_wq);
+ ppd->hfi1_wq = NULL;
+ }
+ }
+ return -ENOMEM;
+}
+
+/**
+ * hfi1_init - do the actual initialization sequence on the chip
+ * @dd: the hfi1_ib device
+ * @reinit: re-initializing, so don't allocate new memory
+ *
+ * Do the actual initialization sequence on the chip. This is done
+ * both from the init routine called from the PCI infrastructure, and
+ * when we reset the chip, or detect that it was reset internally,
+ * or it's administratively re-enabled.
+ *
+ * Memory allocation here and in called routines is only done in
+ * the first case (reinit == 0). We have to be careful, because even
+ * without memory allocation, we need to re-write all the chip registers
+ * TIDs, etc. after the reset or enable has completed.
+ */
+int hfi1_init(struct hfi1_devdata *dd, int reinit)
+{
+ int ret = 0, pidx, lastfail = 0;
+ unsigned i, len;
+ struct hfi1_ctxtdata *rcd;
+ struct hfi1_pportdata *ppd;
+
+ /* Set up recv low level handlers */
+ dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_EXPECTED] =
+ kdeth_process_expected;
+ dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_EAGER] =
+ kdeth_process_eager;
+ dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_IB] = process_receive_ib;
+ dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_ERROR] =
+ process_receive_error;
+ dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_BYPASS] =
+ process_receive_bypass;
+ dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_INVALID5] =
+ process_receive_invalid;
+ dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_INVALID6] =
+ process_receive_invalid;
+ dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_INVALID7] =
+ process_receive_invalid;
+ dd->rhf_rcv_function_map = dd->normal_rhf_rcv_functions;
+
+ /* Set up send low level handlers */
+ dd->process_pio_send = hfi1_verbs_send_pio;
+ dd->process_dma_send = hfi1_verbs_send_dma;
+ dd->pio_inline_send = pio_copy;
+
+ if (is_a0(dd)) {
+ atomic_set(&dd->drop_packet, DROP_PACKET_ON);
+ dd->do_drop = 1;
+ } else {
+ atomic_set(&dd->drop_packet, DROP_PACKET_OFF);
+ dd->do_drop = 0;
+ }
+
+ /* make sure the link is not "up" */
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+ ppd->linkup = 0;
+ }
+
+ if (reinit)
+ ret = init_after_reset(dd);
+ else
+ ret = loadtime_init(dd);
+ if (ret)
+ goto done;
+
+ /* dd->rcd can be NULL if early initialization failed */
+ for (i = 0; dd->rcd && i < dd->first_user_ctxt; ++i) {
+ /*
+ * Set up the (kernel) rcvhdr queue and egr TIDs. If doing
+ * re-init, the simplest way to handle this is to free
+ * existing, and re-allocate.
+ * Need to re-create rest of ctxt 0 ctxtdata as well.
+ */
+ rcd = dd->rcd[i];
+ if (!rcd)
+ continue;
+
+ rcd->do_interrupt = &handle_receive_interrupt;
+
+ lastfail = hfi1_create_rcvhdrq(dd, rcd);
+ if (!lastfail)
+ lastfail = hfi1_setup_eagerbufs(rcd);
+ if (lastfail)
+ dd_dev_err(dd,
+ "failed to allocate kernel ctxt's rcvhdrq and/or egr bufs\n");
+ }
+ if (lastfail)
+ ret = lastfail;
+
+ /* Allocate enough memory for user event notification. */
+ len = ALIGN(dd->chip_rcv_contexts * HFI1_MAX_SHARED_CTXTS *
+ sizeof(*dd->events), PAGE_SIZE);
+ dd->events = vmalloc_user(len);
+ if (!dd->events)
+ dd_dev_err(dd, "Failed to allocate user events page\n");
+ /*
+ * Allocate a page for device and port status.
+ * Page will be shared amongst all user processes.
+ */
+ dd->status = vmalloc_user(PAGE_SIZE);
+ if (!dd->status)
+ dd_dev_err(dd, "Failed to allocate dev status page\n");
+ else
+ dd->freezelen = PAGE_SIZE - (sizeof(*dd->status) -
+ sizeof(dd->status->freezemsg));
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+ if (dd->status)
+ /* Currently, we only have one port */
+ ppd->statusp = &dd->status->port;
+
+ set_mtu(ppd);
+ }
+
+ /* enable chip even if we have an error, so we can debug cause */
+ enable_chip(dd);
+
+ ret = hfi1_cq_init(dd);
+done:
+ /*
+ * Set status even if port serdes is not initialized
+ * so that diags will work.
+ */
+ if (dd->status)
+ dd->status->dev |= HFI1_STATUS_CHIP_PRESENT |
+ HFI1_STATUS_INITTED;
+ if (!ret) {
+ /* enable all interrupts from the chip */
+ set_intr_state(dd, 1);
+
+ /* chip is OK for user apps; mark it as initialized */
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+
+ /* initialize the qsfp if it exists
+ * Requires interrupts to be enabled so we are notified
+ * when the QSFP completes reset, and has
+ * to be done before bringing up the SERDES
+ */
+ init_qsfp(ppd);
+
+ /* start the serdes - must be after interrupts are
+ enabled so we are notified when the link goes up */
+ lastfail = bringup_serdes(ppd);
+ if (lastfail)
+ dd_dev_info(dd,
+ "Failed to bring up port %u\n",
+ ppd->port);
+
+ /*
+ * Set status even if port serdes is not initialized
+ * so that diags will work.
+ */
+ if (ppd->statusp)
+ *ppd->statusp |= HFI1_STATUS_CHIP_PRESENT |
+ HFI1_STATUS_INITTED;
+ if (!ppd->link_speed_enabled)
+ continue;
+ }
+ }
+
+ /* if ret is non-zero, we probably should do some cleanup here... */
+ return ret;
+}
+
+static inline struct hfi1_devdata *__hfi1_lookup(int unit)
+{
+ return idr_find(&hfi1_unit_table, unit);
+}
+
+struct hfi1_devdata *hfi1_lookup(int unit)
+{
+ struct hfi1_devdata *dd;
+ unsigned long flags;
+
+ spin_lock_irqsave(&hfi1_devs_lock, flags);
+ dd = __hfi1_lookup(unit);
+ spin_unlock_irqrestore(&hfi1_devs_lock, flags);
+
+ return dd;
+}
+
+/*
+ * Stop the timers during unit shutdown, or after an error late
+ * in initialization.
+ */
+static void stop_timers(struct hfi1_devdata *dd)
+{
+ struct hfi1_pportdata *ppd;
+ int pidx;
+
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+ if (ppd->led_override_timer.data) {
+ del_timer_sync(&ppd->led_override_timer);
+ atomic_set(&ppd->led_override_timer_active, 0);
+ }
+ }
+}
+
+/**
+ * shutdown_device - shut down a device
+ * @dd: the hfi1_ib device
+ *
+ * This is called to make the device quiet when we are about to
+ * unload the driver, and also when the device is administratively
+ * disabled. It does not free any data structures.
+ * Everything it does has to be setup again by hfi1_init(dd, 1)
+ */
+static void shutdown_device(struct hfi1_devdata *dd)
+{
+ struct hfi1_pportdata *ppd;
+ unsigned pidx;
+ int i;
+
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+
+ ppd->linkup = 0;
+ if (ppd->statusp)
+ *ppd->statusp &= ~(HFI1_STATUS_IB_CONF |
+ HFI1_STATUS_IB_READY);
+ }
+ dd->flags &= ~HFI1_INITTED;
+
+ /* mask interrupts, but not errors */
+ set_intr_state(dd, 0);
+
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+ for (i = 0; i < dd->num_rcv_contexts; i++)
+ hfi1_rcvctrl(dd, HFI1_RCVCTRL_TAILUPD_DIS |
+ HFI1_RCVCTRL_CTXT_DIS |
+ HFI1_RCVCTRL_INTRAVAIL_DIS |
+ HFI1_RCVCTRL_PKEY_DIS |
+ HFI1_RCVCTRL_ONE_PKT_EGR_DIS, i);
+ /*
+ * Gracefully stop all sends allowing any in progress to
+ * trickle out first.
+ */
+ for (i = 0; i < dd->num_send_contexts; i++)
+ sc_flush(dd->send_contexts[i].sc);
+ }
+
+ /*
+ * Enough for anything that's going to trickle out to have actually
+ * done so.
+ */
+ udelay(20);
+
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ ppd = dd->pport + pidx;
+
+ /* disable all contexts */
+ for (i = 0; i < dd->num_send_contexts; i++)
+ sc_disable(dd->send_contexts[i].sc);
+ /* disable the send device */
+ pio_send_control(dd, PSC_GLOBAL_DISABLE);
+
+ /*
+ * Clear SerdesEnable.
+ * We can't count on interrupts since we are stopping.
+ */
+ hfi1_quiet_serdes(ppd);
+
+ if (ppd->hfi1_wq) {
+ destroy_workqueue(ppd->hfi1_wq);
+ ppd->hfi1_wq = NULL;
+ }
+ }
+ sdma_exit(dd);
+}
+
+/**
+ * hfi1_free_ctxtdata - free a context's allocated data
+ * @dd: the hfi1_ib device
+ * @rcd: the ctxtdata structure
+ *
+ * free up any allocated data for a context
+ * This should not touch anything that would affect a simultaneous
+ * re-allocation of context data, because it is called after hfi1_mutex
+ * is released (and can be called from reinit as well).
+ * It should never change any chip state, or global driver state.
+ */
+void hfi1_free_ctxtdata(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd)
+{
+ unsigned e;
+
+ if (!rcd)
+ return;
+
+ if (rcd->rcvhdrq) {
+ dma_free_coherent(&dd->pcidev->dev, rcd->rcvhdrq_size,
+ rcd->rcvhdrq, rcd->rcvhdrq_phys);
+ rcd->rcvhdrq = NULL;
+ if (rcd->rcvhdrtail_kvaddr) {
+ dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE,
+ (void *)rcd->rcvhdrtail_kvaddr,
+ rcd->rcvhdrqtailaddr_phys);
+ rcd->rcvhdrtail_kvaddr = NULL;
+ }
+ }
+
+ /* all the RcvArray entries should have been cleared by now */
+ kfree(rcd->egrbufs.rcvtids);
+
+ for (e = 0; e < rcd->egrbufs.alloced; e++) {
+ if (rcd->egrbufs.buffers[e].phys)
+ dma_free_coherent(&dd->pcidev->dev,
+ rcd->egrbufs.buffers[e].len,
+ rcd->egrbufs.buffers[e].addr,
+ rcd->egrbufs.buffers[e].phys);
+ }
+ kfree(rcd->egrbufs.buffers);
+
+ sc_free(rcd->sc);
+ vfree(rcd->physshadow);
+ vfree(rcd->tid_pg_list);
+ vfree(rcd->user_event_mask);
+ vfree(rcd->subctxt_uregbase);
+ vfree(rcd->subctxt_rcvegrbuf);
+ vfree(rcd->subctxt_rcvhdr_base);
+ kfree(rcd->tidusemap);
+ kfree(rcd->opstats);
+ kfree(rcd);
+}
+
+void hfi1_free_devdata(struct hfi1_devdata *dd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&hfi1_devs_lock, flags);
+ idr_remove(&hfi1_unit_table, dd->unit);
+ list_del(&dd->list);
+ spin_unlock_irqrestore(&hfi1_devs_lock, flags);
+ hfi1_dbg_ibdev_exit(&dd->verbs_dev);
+ rcu_barrier(); /* wait for rcu callbacks to complete */
+ free_percpu(dd->int_counter);
+ free_percpu(dd->rcv_limit);
+ ib_dealloc_device(&dd->verbs_dev.ibdev);
+}
+
+/*
+ * Allocate our primary per-unit data structure. Must be done via verbs
+ * allocator, because the verbs cleanup process both does cleanup and
+ * free of the data structure.
+ * "extra" is for chip-specific data.
+ *
+ * Use the idr mechanism to get a unit number for this unit.
+ */
+struct hfi1_devdata *hfi1_alloc_devdata(struct pci_dev *pdev, size_t extra)
+{
+ unsigned long flags;
+ struct hfi1_devdata *dd;
+ int ret;
+
+ dd = (struct hfi1_devdata *)ib_alloc_device(sizeof(*dd) + extra);
+ if (!dd)
+ return ERR_PTR(-ENOMEM);
+ /* extra is * number of ports */
+ dd->num_pports = extra / sizeof(struct hfi1_pportdata);
+ dd->pport = (struct hfi1_pportdata *)(dd + 1);
+
+ INIT_LIST_HEAD(&dd->list);
+ dd->node = dev_to_node(&pdev->dev);
+ if (dd->node < 0)
+ dd->node = 0;
+ idr_preload(GFP_KERNEL);
+ spin_lock_irqsave(&hfi1_devs_lock, flags);
+
+ ret = idr_alloc(&hfi1_unit_table, dd, 0, 0, GFP_NOWAIT);
+ if (ret >= 0) {
+ dd->unit = ret;
+ list_add(&dd->list, &hfi1_dev_list);
+ }
+
+ spin_unlock_irqrestore(&hfi1_devs_lock, flags);
+ idr_preload_end();
+
+ if (ret < 0) {
+ hfi1_early_err(&pdev->dev,
+ "Could not allocate unit ID: error %d\n", -ret);
+ goto bail;
+ }
+ /*
+ * Initialize all locks for the device. This needs to be as early as
+ * possible so locks are usable.
+ */
+ spin_lock_init(&dd->sc_lock);
+ spin_lock_init(&dd->sendctrl_lock);
+ spin_lock_init(&dd->rcvctrl_lock);
+ spin_lock_init(&dd->uctxt_lock);
+ spin_lock_init(&dd->hfi1_diag_trans_lock);
+ spin_lock_init(&dd->sc_init_lock);
+ spin_lock_init(&dd->dc8051_lock);
+ spin_lock_init(&dd->dc8051_memlock);
+ mutex_init(&dd->qsfp_i2c_mutex);
+ seqlock_init(&dd->sc2vl_lock);
+ spin_lock_init(&dd->sde_map_lock);
+ init_waitqueue_head(&dd->event_queue);
+
+ dd->int_counter = alloc_percpu(u64);
+ if (!dd->int_counter) {
+ ret = -ENOMEM;
+ hfi1_early_err(&pdev->dev,
+ "Could not allocate per-cpu int_counter\n");
+ goto bail;
+ }
+
+ dd->rcv_limit = alloc_percpu(u64);
+ if (!dd->rcv_limit) {
+ ret = -ENOMEM;
+ hfi1_early_err(&pdev->dev,
+ "Could not allocate per-cpu rcv_limit\n");
+ goto bail;
+ }
+
+ if (!hfi1_cpulist_count) {
+ u32 count = num_online_cpus();
+
+ hfi1_cpulist = kzalloc(BITS_TO_LONGS(count) *
+ sizeof(long), GFP_KERNEL);
+ if (hfi1_cpulist)
+ hfi1_cpulist_count = count;
+ else
+ hfi1_early_err(
+ &pdev->dev,
+ "Could not alloc cpulist info, cpu affinity might be wrong\n");
+ }
+ hfi1_dbg_ibdev_init(&dd->verbs_dev);
+ return dd;
+
+bail:
+ if (!list_empty(&dd->list))
+ list_del_init(&dd->list);
+ ib_dealloc_device(&dd->verbs_dev.ibdev);
+ return ERR_PTR(ret);
+}
+
+/*
+ * Called from freeze mode handlers, and from PCI error
+ * reporting code. Should be paranoid about state of
+ * system and data structures.
+ */
+void hfi1_disable_after_error(struct hfi1_devdata *dd)
+{
+ if (dd->flags & HFI1_INITTED) {
+ u32 pidx;
+
+ dd->flags &= ~HFI1_INITTED;
+ if (dd->pport)
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ struct hfi1_pportdata *ppd;
+
+ ppd = dd->pport + pidx;
+ if (dd->flags & HFI1_PRESENT)
+ set_link_state(ppd, HLS_DN_DISABLE);
+
+ if (ppd->statusp)
+ *ppd->statusp &= ~HFI1_STATUS_IB_READY;
+ }
+ }
+
+ /*
+ * Mark as having had an error for driver, and also
+ * for /sys and status word mapped to user programs.
+ * This marks unit as not usable, until reset.
+ */
+ if (dd->status)
+ dd->status->dev |= HFI1_STATUS_HWERROR;
+}
+
+static void remove_one(struct pci_dev *);
+static int init_one(struct pci_dev *, const struct pci_device_id *);
+
+#define DRIVER_LOAD_MSG "Intel " DRIVER_NAME " loaded: "
+#define PFX DRIVER_NAME ": "
+
+static const struct pci_device_id hfi1_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL0) },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL1) },
+ { 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, hfi1_pci_tbl);
+
+static struct pci_driver hfi1_pci_driver = {
+ .name = DRIVER_NAME,
+ .probe = init_one,
+ .remove = remove_one,
+ .id_table = hfi1_pci_tbl,
+ .err_handler = &hfi1_pci_err_handler,
+};
+
+static void __init compute_krcvqs(void)
+{
+ int i;
+
+ for (i = 0; i < krcvqsset; i++)
+ n_krcvqs += krcvqs[i];
+}
+
+/*
+ * Do all the generic driver unit- and chip-independent memory
+ * allocation and initialization.
+ */
+static int __init hfi1_mod_init(void)
+{
+ int ret;
+
+ ret = dev_init();
+ if (ret)
+ goto bail;
+
+ /* validate max MTU before any devices start */
+ if (!valid_opa_max_mtu(hfi1_max_mtu)) {
+ pr_err("Invalid max_mtu 0x%x, using 0x%x instead\n",
+ hfi1_max_mtu, HFI1_DEFAULT_MAX_MTU);
+ hfi1_max_mtu = HFI1_DEFAULT_MAX_MTU;
+ }
+ /* valid CUs run from 1-128 in powers of 2 */
+ if (hfi1_cu > 128 || !is_power_of_2(hfi1_cu))
+ hfi1_cu = 1;
+ /* valid credit return threshold is 0-100, variable is unsigned */
+ if (user_credit_return_threshold > 100)
+ user_credit_return_threshold = 100;
+
+ compute_krcvqs();
+ /* sanitize receive interrupt count, time must wait until after
+ the hardware type is known */
+ if (rcv_intr_count > RCV_HDR_HEAD_COUNTER_MASK)
+ rcv_intr_count = RCV_HDR_HEAD_COUNTER_MASK;
+ /* reject invalid combinations */
+ if (rcv_intr_count == 0 && rcv_intr_timeout == 0) {
+ pr_err("Invalid mode: both receive interrupt count and available timeout are zero - setting interrupt count to 1\n");
+ rcv_intr_count = 1;
+ }
+ if (rcv_intr_count > 1 && rcv_intr_timeout == 0) {
+ /*
+ * Avoid indefinite packet delivery by requiring a timeout
+ * if count is > 1.
+ */
+ pr_err("Invalid mode: receive interrupt count greater than 1 and available timeout is zero - setting available timeout to 1\n");
+ rcv_intr_timeout = 1;
+ }
+ if (rcv_intr_dynamic && !(rcv_intr_count > 1 && rcv_intr_timeout > 0)) {
+ /*
+ * The dynamic algorithm expects a non-zero timeout
+ * and a count > 1.
+ */
+ pr_err("Invalid mode: dynamic receive interrupt mitigation with invalid count and timeout - turning dynamic off\n");
+ rcv_intr_dynamic = 0;
+ }
+
+ /* sanitize link CRC options */
+ link_crc_mask &= SUPPORTED_CRCS;
+
+ /*
+ * These must be called before the driver is registered with
+ * the PCI subsystem.
+ */
+ idr_init(&hfi1_unit_table);
+
+ hfi1_dbg_init();
+ ret = pci_register_driver(&hfi1_pci_driver);
+ if (ret < 0) {
+ pr_err("Unable to register driver: error %d\n", -ret);
+ goto bail_dev;
+ }
+ goto bail; /* all OK */
+
+bail_dev:
+ hfi1_dbg_exit();
+ idr_destroy(&hfi1_unit_table);
+ dev_cleanup();
+bail:
+ return ret;
+}
+
+module_init(hfi1_mod_init);
+
+/*
+ * Do the non-unit driver cleanup, memory free, etc. at unload.
+ */
+static void __exit hfi1_mod_cleanup(void)
+{
+ pci_unregister_driver(&hfi1_pci_driver);
+ hfi1_dbg_exit();
+ hfi1_cpulist_count = 0;
+ kfree(hfi1_cpulist);
+
+ idr_destroy(&hfi1_unit_table);
+ dispose_firmware(); /* asymmetric with obtain_firmware() */
+ dev_cleanup();
+}
+
+module_exit(hfi1_mod_cleanup);
+
+/* this can only be called after a successful initialization */
+static void cleanup_device_data(struct hfi1_devdata *dd)
+{
+ int ctxt;
+ int pidx;
+ struct hfi1_ctxtdata **tmp;
+ unsigned long flags;
+
+ /* users can't do anything more with chip */
+ for (pidx = 0; pidx < dd->num_pports; ++pidx) {
+ struct hfi1_pportdata *ppd = &dd->pport[pidx];
+ struct cc_state *cc_state;
+ int i;
+
+ if (ppd->statusp)
+ *ppd->statusp &= ~HFI1_STATUS_CHIP_PRESENT;
+
+ for (i = 0; i < OPA_MAX_SLS; i++)
+ hrtimer_cancel(&ppd->cca_timer[i].hrtimer);
+
+ spin_lock(&ppd->cc_state_lock);
+ cc_state = get_cc_state(ppd);
+ rcu_assign_pointer(ppd->cc_state, NULL);
+ spin_unlock(&ppd->cc_state_lock);
+
+ if (cc_state)
+ call_rcu(&cc_state->rcu, cc_state_reclaim);
+ }
+
+ free_credit_return(dd);
+
+ /*
+ * Free any resources still in use (usually just kernel contexts)
+ * at unload; we do for ctxtcnt, because that's what we allocate.
+ * We acquire lock to be really paranoid that rcd isn't being
+ * accessed from some interrupt-related code (that should not happen,
+ * but best to be sure).
+ */
+ spin_lock_irqsave(&dd->uctxt_lock, flags);
+ tmp = dd->rcd;
+ dd->rcd = NULL;
+ spin_unlock_irqrestore(&dd->uctxt_lock, flags);
+ for (ctxt = 0; tmp && ctxt < dd->num_rcv_contexts; ctxt++) {
+ struct hfi1_ctxtdata *rcd = tmp[ctxt];
+
+ tmp[ctxt] = NULL; /* debugging paranoia */
+ if (rcd) {
+ hfi1_clear_tids(rcd);
+ hfi1_free_ctxtdata(dd, rcd);
+ }
+ }
+ kfree(tmp);
+ /* must follow rcv context free - need to remove rcv's hooks */
+ for (ctxt = 0; ctxt < dd->num_send_contexts; ctxt++)
+ sc_free(dd->send_contexts[ctxt].sc);
+ dd->num_send_contexts = 0;
+ kfree(dd->send_contexts);
+ dd->send_contexts = NULL;
+ kfree(dd->boardname);
+ vfree(dd->events);
+ vfree(dd->status);
+ hfi1_cq_exit(dd);
+}
+
+/*
+ * Clean up on unit shutdown, or error during unit load after
+ * successful initialization.
+ */
+static void postinit_cleanup(struct hfi1_devdata *dd)
+{
+ hfi1_start_cleanup(dd);
+
+ hfi1_pcie_ddcleanup(dd);
+ hfi1_pcie_cleanup(dd->pcidev);
+
+ cleanup_device_data(dd);
+
+ hfi1_free_devdata(dd);
+}
+
+static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ int ret = 0, j, pidx, initfail;
+ struct hfi1_devdata *dd = NULL;
+
+ /* First, lock the non-writable module parameters */
+ HFI1_CAP_LOCK();
+
+ /* Validate some global module parameters */
+ if (rcvhdrcnt <= HFI1_MIN_HDRQ_EGRBUF_CNT) {
+ hfi1_early_err(&pdev->dev, "Header queue count too small\n");
+ ret = -EINVAL;
+ goto bail;
+ }
+ /* use the encoding function as a sanitization check */
+ if (!encode_rcv_header_entry_size(hfi1_hdrq_entsize)) {
+ hfi1_early_err(&pdev->dev, "Invalid HdrQ Entry size %u\n",
+ hfi1_hdrq_entsize);
+ goto bail;
+ }
+
+ /* The receive eager buffer size must be set before the receive
+ * contexts are created.
+ *
+ * Set the eager buffer size. Validate that it falls in a range
+ * allowed by the hardware - all powers of 2 between the min and
+ * max. The maximum valid MTU is within the eager buffer range
+ * so we do not need to cap the max_mtu by an eager buffer size
+ * setting.
+ */
+ if (eager_buffer_size) {
+ if (!is_power_of_2(eager_buffer_size))
+ eager_buffer_size =
+ roundup_pow_of_two(eager_buffer_size);
+ eager_buffer_size =
+ clamp_val(eager_buffer_size,
+ MIN_EAGER_BUFFER * 8,
+ MAX_EAGER_BUFFER_TOTAL);
+ hfi1_early_info(&pdev->dev, "Eager buffer size %u\n",
+ eager_buffer_size);
+ } else {
+ hfi1_early_err(&pdev->dev, "Invalid Eager buffer size of 0\n");
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ /* restrict value of hfi1_rcvarr_split */
+ hfi1_rcvarr_split = clamp_val(hfi1_rcvarr_split, 0, 100);
+
+ ret = hfi1_pcie_init(pdev, ent);
+ if (ret)
+ goto bail;
+
+ /*
+ * Do device-specific initialization, function table setup, dd
+ * allocation, etc.
+ */
+ switch (ent->device) {
+ case PCI_DEVICE_ID_INTEL0:
+ case PCI_DEVICE_ID_INTEL1:
+ dd = hfi1_init_dd(pdev, ent);
+ break;
+ default:
+ hfi1_early_err(&pdev->dev,
+ "Failing on unknown Intel deviceid 0x%x\n",
+ ent->device);
+ ret = -ENODEV;
+ }
+
+ if (IS_ERR(dd))
+ ret = PTR_ERR(dd);
+ if (ret)
+ goto clean_bail; /* error already printed */
+
+ ret = create_workqueues(dd);
+ if (ret)
+ goto clean_bail;
+
+ /* do the generic initialization */
+ initfail = hfi1_init(dd, 0);
+
+ ret = hfi1_register_ib_device(dd);
+
+ /*
+ * Now ready for use. this should be cleared whenever we
+ * detect a reset, or initiate one. If earlier failure,
+ * we still create devices, so diags, etc. can be used
+ * to determine cause of problem.
+ */
+ if (!initfail && !ret)
+ dd->flags |= HFI1_INITTED;
+
+ j = hfi1_device_create(dd);
+ if (j)
+ dd_dev_err(dd, "Failed to create /dev devices: %d\n", -j);
+
+ if (initfail || ret) {
+ stop_timers(dd);
+ flush_workqueue(ib_wq);
+ for (pidx = 0; pidx < dd->num_pports; ++pidx)
+ hfi1_quiet_serdes(dd->pport + pidx);
+ if (!j)
+ hfi1_device_remove(dd);
+ if (!ret)
+ hfi1_unregister_ib_device(dd);
+ postinit_cleanup(dd);
+ if (initfail)
+ ret = initfail;
+ goto bail; /* everything already cleaned */
+ }
+
+ sdma_start(dd);
+
+ return 0;
+
+clean_bail:
+ hfi1_pcie_cleanup(pdev);
+bail:
+ return ret;
+}
+
+static void remove_one(struct pci_dev *pdev)
+{
+ struct hfi1_devdata *dd = pci_get_drvdata(pdev);
+
+ /* unregister from IB core */
+ hfi1_unregister_ib_device(dd);
+
+ /*
+ * Disable the IB link, disable interrupts on the device,
+ * clear dma engines, etc.
+ */
+ shutdown_device(dd);
+
+ stop_timers(dd);
+
+ /* wait until all of our (qsfp) queue_work() calls complete */
+ flush_workqueue(ib_wq);
+
+ hfi1_device_remove(dd);
+
+ postinit_cleanup(dd);
+}
+
+/**
+ * hfi1_create_rcvhdrq - create a receive header queue
+ * @dd: the hfi1_ib device
+ * @rcd: the context data
+ *
+ * This must be contiguous memory (from an i/o perspective), and must be
+ * DMA'able (which means for some systems, it will go through an IOMMU,
+ * or be forced into a low address range).
+ */
+int hfi1_create_rcvhdrq(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd)
+{
+ unsigned amt;
+ u64 reg;
+
+ if (!rcd->rcvhdrq) {
+ dma_addr_t phys_hdrqtail;
+ gfp_t gfp_flags;
+
+ /*
+ * rcvhdrqentsize is in DWs, so we have to convert to bytes
+ * (* sizeof(u32)).
+ */
+ amt = ALIGN(rcd->rcvhdrq_cnt * rcd->rcvhdrqentsize *
+ sizeof(u32), PAGE_SIZE);
+
+ gfp_flags = (rcd->ctxt >= dd->first_user_ctxt) ?
+ GFP_USER : GFP_KERNEL;
+ rcd->rcvhdrq = dma_zalloc_coherent(
+ &dd->pcidev->dev, amt, &rcd->rcvhdrq_phys,
+ gfp_flags | __GFP_COMP);
+
+ if (!rcd->rcvhdrq) {
+ dd_dev_err(dd,
+ "attempt to allocate %d bytes for ctxt %u rcvhdrq failed\n",
+ amt, rcd->ctxt);
+ goto bail;
+ }
+
+ /* Event mask is per device now and is in hfi1_devdata */
+ /*if (rcd->ctxt >= dd->first_user_ctxt) {
+ rcd->user_event_mask = vmalloc_user(PAGE_SIZE);
+ if (!rcd->user_event_mask)
+ goto bail_free_hdrq;
+ }*/
+
+ if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) {
+ rcd->rcvhdrtail_kvaddr = dma_zalloc_coherent(
+ &dd->pcidev->dev, PAGE_SIZE, &phys_hdrqtail,
+ gfp_flags);
+ if (!rcd->rcvhdrtail_kvaddr)
+ goto bail_free;
+ rcd->rcvhdrqtailaddr_phys = phys_hdrqtail;
+ }
+
+ rcd->rcvhdrq_size = amt;
+ }
+ /*
+ * These values are per-context:
+ * RcvHdrCnt
+ * RcvHdrEntSize
+ * RcvHdrSize
+ */
+ reg = ((u64)(rcd->rcvhdrq_cnt >> HDRQ_SIZE_SHIFT)
+ & RCV_HDR_CNT_CNT_MASK)
+ << RCV_HDR_CNT_CNT_SHIFT;
+ write_kctxt_csr(dd, rcd->ctxt, RCV_HDR_CNT, reg);
+ reg = (encode_rcv_header_entry_size(rcd->rcvhdrqentsize)
+ & RCV_HDR_ENT_SIZE_ENT_SIZE_MASK)
+ << RCV_HDR_ENT_SIZE_ENT_SIZE_SHIFT;
+ write_kctxt_csr(dd, rcd->ctxt, RCV_HDR_ENT_SIZE, reg);
+ reg = (dd->rcvhdrsize & RCV_HDR_SIZE_HDR_SIZE_MASK)
+ << RCV_HDR_SIZE_HDR_SIZE_SHIFT;
+ write_kctxt_csr(dd, rcd->ctxt, RCV_HDR_SIZE, reg);
+ return 0;
+
+bail_free:
+ dd_dev_err(dd,
+ "attempt to allocate 1 page for ctxt %u rcvhdrqtailaddr failed\n",
+ rcd->ctxt);
+ vfree(rcd->user_event_mask);
+ rcd->user_event_mask = NULL;
+ dma_free_coherent(&dd->pcidev->dev, amt, rcd->rcvhdrq,
+ rcd->rcvhdrq_phys);
+ rcd->rcvhdrq = NULL;
+bail:
+ return -ENOMEM;
+}
+
+/**
+ * allocate eager buffers, both kernel and user contexts.
+ * @rcd: the context we are setting up.
+ *
+ * Allocate the eager TID buffers and program them into hip.
+ * They are no longer completely contiguous, we do multiple allocation
+ * calls. Otherwise we get the OOM code involved, by asking for too
+ * much per call, with disastrous results on some kernels.
+ */
+int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd)
+{
+ struct hfi1_devdata *dd = rcd->dd;
+ u32 max_entries, egrtop, alloced_bytes = 0, idx = 0;
+ gfp_t gfp_flags;
+ u16 order;
+ int ret = 0;
+ u16 round_mtu = roundup_pow_of_two(hfi1_max_mtu);
+
+ /*
+ * GFP_USER, but without GFP_FS, so buffer cache can be
+ * coalesced (we hope); otherwise, even at order 4,
+ * heavy filesystem activity makes these fail, and we can
+ * use compound pages.
+ */
+ gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP;
+
+ /*
+ * The minimum size of the eager buffers is a groups of MTU-sized
+ * buffers.
+ * The global eager_buffer_size parameter is checked against the
+ * theoretical lower limit of the value. Here, we check against the
+ * MTU.
+ */
+ if (rcd->egrbufs.size < (round_mtu * dd->rcv_entries.group_size))
+ rcd->egrbufs.size = round_mtu * dd->rcv_entries.group_size;
+ /*
+ * If using one-pkt-per-egr-buffer, lower the eager buffer
+ * size to the max MTU (page-aligned).
+ */
+ if (!HFI1_CAP_KGET_MASK(rcd->flags, MULTI_PKT_EGR))
+ rcd->egrbufs.rcvtid_size = round_mtu;
+
+ /*
+ * Eager buffers sizes of 1MB or less require smaller TID sizes
+ * to satisfy the "multiple of 8 RcvArray entries" requirement.
+ */
+ if (rcd->egrbufs.size <= (1 << 20))
+ rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu,
+ rounddown_pow_of_two(rcd->egrbufs.size / 8));
+
+ while (alloced_bytes < rcd->egrbufs.size &&
+ rcd->egrbufs.alloced < rcd->egrbufs.count) {
+ rcd->egrbufs.buffers[idx].addr =
+ dma_zalloc_coherent(&dd->pcidev->dev,
+ rcd->egrbufs.rcvtid_size,
+ &rcd->egrbufs.buffers[idx].phys,
+ gfp_flags);
+ if (rcd->egrbufs.buffers[idx].addr) {
+ rcd->egrbufs.buffers[idx].len =
+ rcd->egrbufs.rcvtid_size;
+ rcd->egrbufs.rcvtids[rcd->egrbufs.alloced].addr =
+ rcd->egrbufs.buffers[idx].addr;
+ rcd->egrbufs.rcvtids[rcd->egrbufs.alloced].phys =
+ rcd->egrbufs.buffers[idx].phys;
+ rcd->egrbufs.alloced++;
+ alloced_bytes += rcd->egrbufs.rcvtid_size;
+ idx++;
+ } else {
+ u32 new_size, i, j;
+ u64 offset = 0;
+
+ /*
+ * Fail the eager buffer allocation if:
+ * - we are already using the lowest acceptable size
+ * - we are using one-pkt-per-egr-buffer (this implies
+ * that we are accepting only one size)
+ */
+ if (rcd->egrbufs.rcvtid_size == round_mtu ||
+ !HFI1_CAP_KGET_MASK(rcd->flags, MULTI_PKT_EGR)) {
+ dd_dev_err(dd, "ctxt%u: Failed to allocate eager buffers\n",
+ rcd->ctxt);
+ goto bail_rcvegrbuf_phys;
+ }
+
+ new_size = rcd->egrbufs.rcvtid_size / 2;
+
+ /*
+ * If the first attempt to allocate memory failed, don't
+ * fail everything but continue with the next lower
+ * size.
+ */
+ if (idx == 0) {
+ rcd->egrbufs.rcvtid_size = new_size;
+ continue;
+ }
+
+ /*
+ * Re-partition already allocated buffers to a smaller
+ * size.
+ */
+ rcd->egrbufs.alloced = 0;
+ for (i = 0, j = 0, offset = 0; j < idx; i++) {
+ if (i >= rcd->egrbufs.count)
+ break;
+ rcd->egrbufs.rcvtids[i].phys =
+ rcd->egrbufs.buffers[j].phys + offset;
+ rcd->egrbufs.rcvtids[i].addr =
+ rcd->egrbufs.buffers[j].addr + offset;
+ rcd->egrbufs.alloced++;
+ if ((rcd->egrbufs.buffers[j].phys + offset +
+ new_size) ==
+ (rcd->egrbufs.buffers[j].phys +
+ rcd->egrbufs.buffers[j].len)) {
+ j++;
+ offset = 0;
+ } else
+ offset += new_size;
+ }
+ rcd->egrbufs.rcvtid_size = new_size;
+ }
+ }
+ rcd->egrbufs.numbufs = idx;
+ rcd->egrbufs.size = alloced_bytes;
+
+ dd_dev_info(dd, "ctxt%u: Alloced %u rcv tid entries @ %uKB, total %zuKB\n",
+ rcd->ctxt, rcd->egrbufs.alloced, rcd->egrbufs.rcvtid_size,
+ rcd->egrbufs.size);
+
+ /*
+ * Set the contexts rcv array head update threshold to the closest
+ * power of 2 (so we can use a mask instead of modulo) below half
+ * the allocated entries.
+ */
+ rcd->egrbufs.threshold =
+ rounddown_pow_of_two(rcd->egrbufs.alloced / 2);
+ /*
+ * Compute the expected RcvArray entry base. This is done after
+ * allocating the eager buffers in order to maximize the
+ * expected RcvArray entries for the context.
+ */
+ max_entries = rcd->rcv_array_groups * dd->rcv_entries.group_size;
+ egrtop = roundup(rcd->egrbufs.alloced, dd->rcv_entries.group_size);
+ rcd->expected_count = max_entries - egrtop;
+ if (rcd->expected_count > MAX_TID_PAIR_ENTRIES * 2)
+ rcd->expected_count = MAX_TID_PAIR_ENTRIES * 2;
+
+ rcd->expected_base = rcd->eager_base + egrtop;
+ dd_dev_info(dd, "ctxt%u: eager:%u, exp:%u, egrbase:%u, expbase:%u\n",
+ rcd->ctxt, rcd->egrbufs.alloced, rcd->expected_count,
+ rcd->eager_base, rcd->expected_base);
+
+ if (!hfi1_rcvbuf_validate(rcd->egrbufs.rcvtid_size, PT_EAGER, &order)) {
+ dd_dev_err(dd, "ctxt%u: current Eager buffer size is invalid %u\n",
+ rcd->ctxt, rcd->egrbufs.rcvtid_size);
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ for (idx = 0; idx < rcd->egrbufs.alloced; idx++) {
+ hfi1_put_tid(dd, rcd->eager_base + idx, PT_EAGER,
+ rcd->egrbufs.rcvtids[idx].phys, order);
+ cond_resched();
+ }
+ goto bail;
+
+bail_rcvegrbuf_phys:
+ for (idx = 0; idx < rcd->egrbufs.alloced &&
+ rcd->egrbufs.buffers[idx].addr;
+ idx++) {
+ dma_free_coherent(&dd->pcidev->dev,
+ rcd->egrbufs.buffers[idx].len,
+ rcd->egrbufs.buffers[idx].addr,
+ rcd->egrbufs.buffers[idx].phys);
+ rcd->egrbufs.buffers[idx].addr = NULL;
+ rcd->egrbufs.buffers[idx].phys = 0;
+ rcd->egrbufs.buffers[idx].len = 0;
+ }
+bail:
+ return ret;
+}
diff --git a/drivers/staging/rdma/hfi1/intr.c b/drivers/staging/rdma/hfi1/intr.c
new file mode 100644
index 0000000..426582b
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/intr.c
@@ -0,0 +1,207 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/delay.h>
+
+#include "hfi.h"
+#include "common.h"
+#include "sdma.h"
+
+/**
+ * format_hwmsg - format a single hwerror message
+ * @msg message buffer
+ * @msgl length of message buffer
+ * @hwmsg message to add to message buffer
+ */
+static void format_hwmsg(char *msg, size_t msgl, const char *hwmsg)
+{
+ strlcat(msg, "[", msgl);
+ strlcat(msg, hwmsg, msgl);
+ strlcat(msg, "]", msgl);
+}
+
+/**
+ * hfi1_format_hwerrors - format hardware error messages for display
+ * @hwerrs hardware errors bit vector
+ * @hwerrmsgs hardware error descriptions
+ * @nhwerrmsgs number of hwerrmsgs
+ * @msg message buffer
+ * @msgl message buffer length
+ */
+void hfi1_format_hwerrors(u64 hwerrs, const struct hfi1_hwerror_msgs *hwerrmsgs,
+ size_t nhwerrmsgs, char *msg, size_t msgl)
+{
+ int i;
+
+ for (i = 0; i < nhwerrmsgs; i++)
+ if (hwerrs & hwerrmsgs[i].mask)
+ format_hwmsg(msg, msgl, hwerrmsgs[i].msg);
+}
+
+static void signal_ib_event(struct hfi1_pportdata *ppd, enum ib_event_type ev)
+{
+ struct ib_event event;
+ struct hfi1_devdata *dd = ppd->dd;
+
+ /*
+ * Only call ib_dispatch_event() if the IB device has been
+ * registered. HFI1_INITED is set iff the driver has successfully
+ * registered with the IB core.
+ */
+ if (!(dd->flags & HFI1_INITTED))
+ return;
+ event.device = &dd->verbs_dev.ibdev;
+ event.element.port_num = ppd->port;
+ event.event = ev;
+ ib_dispatch_event(&event);
+}
+
+/*
+ * Handle a linkup or link down notification.
+ * This is called outside an interrupt.
+ */
+void handle_linkup_change(struct hfi1_devdata *dd, u32 linkup)
+{
+ struct hfi1_pportdata *ppd = &dd->pport[0];
+ enum ib_event_type ev;
+
+ if (!(ppd->linkup ^ !!linkup))
+ return; /* no change, nothing to do */
+
+ if (linkup) {
+ /*
+ * Quick linkup and all link up on the simulator does not
+ * trigger or implement:
+ * - VerifyCap interrupt
+ * - VerifyCap frames
+ * But rather moves directly to LinkUp.
+ *
+ * Do the work of the VerifyCap interrupt handler,
+ * handle_verify_cap(), but do not try moving the state to
+ * LinkUp as we are already there.
+ *
+ * NOTE: This uses this device's vAU, vCU, and vl15_init for
+ * the remote values. Both sides must be using the values.
+ */
+ if (quick_linkup
+ || dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
+ set_up_vl15(dd, dd->vau, dd->vl15_init);
+ assign_remote_cm_au_table(dd, dd->vcu);
+ ppd->neighbor_guid =
+ read_csr(dd,
+ DC_DC8051_STS_REMOTE_GUID);
+ ppd->neighbor_type =
+ read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) &
+ DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK;
+ ppd->neighbor_port_number =
+ read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) &
+ DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK;
+ dd_dev_info(dd,
+ "Neighbor GUID: %llx Neighbor type %d\n",
+ ppd->neighbor_guid,
+ ppd->neighbor_type);
+ }
+
+ /* physical link went up */
+ ppd->linkup = 1;
+ ppd->offline_disabled_reason = OPA_LINKDOWN_REASON_NONE;
+
+ /* link widths are not available until the link is fully up */
+ get_linkup_link_widths(ppd);
+
+ } else {
+ /* physical link went down */
+ ppd->linkup = 0;
+
+ /* clear HW details of the previous connection */
+ reset_link_credits(dd);
+
+ /* freeze after a link down to guarantee a clean egress */
+ start_freeze_handling(ppd, FREEZE_SELF|FREEZE_LINK_DOWN);
+
+ ev = IB_EVENT_PORT_ERR;
+
+ hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LINKDOWN_BIT);
+
+ /* if we are down, the neighbor is down */
+ ppd->neighbor_normal = 0;
+
+ /* notify IB of the link change */
+ signal_ib_event(ppd, ev);
+ }
+
+
+}
+
+/*
+ * Handle receive or urgent interrupts for user contexts. This means a user
+ * process was waiting for a packet to arrive, and didn't want to poll.
+ */
+void handle_user_interrupt(struct hfi1_ctxtdata *rcd)
+{
+ struct hfi1_devdata *dd = rcd->dd;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dd->uctxt_lock, flags);
+ if (!rcd->cnt)
+ goto done;
+
+ if (test_and_clear_bit(HFI1_CTXT_WAITING_RCV, &rcd->event_flags)) {
+ wake_up_interruptible(&rcd->wait);
+ hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_DIS, rcd->ctxt);
+ } else if (test_and_clear_bit(HFI1_CTXT_WAITING_URG,
+ &rcd->event_flags)) {
+ rcd->urgent++;
+ wake_up_interruptible(&rcd->wait);
+ }
+done:
+ spin_unlock_irqrestore(&dd->uctxt_lock, flags);
+}
diff --git a/drivers/staging/rdma/hfi1/iowait.h b/drivers/staging/rdma/hfi1/iowait.h
new file mode 100644
index 0000000..fa361b4
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/iowait.h
@@ -0,0 +1,186 @@
+#ifndef _HFI1_IOWAIT_H
+#define _HFI1_IOWAIT_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/list.h>
+#include <linux/workqueue.h>
+#include <linux/sched.h>
+
+/*
+ * typedef (*restart_t)() - restart callback
+ * @work: pointer to work structure
+ */
+typedef void (*restart_t)(struct work_struct *work);
+
+struct sdma_txreq;
+struct sdma_engine;
+/**
+ * struct iowait - linkage for delayed progress/waiting
+ * @list: used to add/insert into QP/PQ wait lists
+ * @tx_head: overflow list of sdma_txreq's
+ * @sleep: no space callback
+ * @wakeup: space callback
+ * @iowork: workqueue overhead
+ * @wait_dma: wait for sdma_busy == 0
+ * @sdma_busy: # of packets in flight
+ * @count: total number of descriptors in tx_head'ed list
+ * @tx_limit: limit for overflow queuing
+ * @tx_count: number of tx entry's in tx_head'ed list
+ *
+ * This is to be embedded in user's state structure
+ * (QP or PQ).
+ *
+ * The sleep and wakeup members are a
+ * bit misnamed. They do not strictly
+ * speaking sleep or wake up, but they
+ * are callbacks for the ULP to implement
+ * what ever queuing/dequeuing of
+ * the embedded iowait and its containing struct
+ * when a resource shortage like SDMA ring space is seen.
+ *
+ * Both potentially have locks help
+ * so sleeping is not allowed.
+ *
+ * The wait_dma member along with the iow
+ */
+
+struct iowait {
+ struct list_head list;
+ struct list_head tx_head;
+ int (*sleep)(
+ struct sdma_engine *sde,
+ struct iowait *wait,
+ struct sdma_txreq *tx,
+ unsigned seq);
+ void (*wakeup)(struct iowait *wait, int reason);
+ struct work_struct iowork;
+ wait_queue_head_t wait_dma;
+ atomic_t sdma_busy;
+ u32 count;
+ u32 tx_limit;
+ u32 tx_count;
+};
+
+#define SDMA_AVAIL_REASON 0
+
+/**
+ * iowait_init() - initialize wait structure
+ * @wait: wait struct to initialize
+ * @tx_limit: limit for overflow queuing
+ * @func: restart function for workqueue
+ * @sleep: sleep function for no space
+ * @wakeup: wakeup function for no space
+ *
+ * This function initializes the iowait
+ * structure embedded in the QP or PQ.
+ *
+ */
+
+static inline void iowait_init(
+ struct iowait *wait,
+ u32 tx_limit,
+ void (*func)(struct work_struct *work),
+ int (*sleep)(
+ struct sdma_engine *sde,
+ struct iowait *wait,
+ struct sdma_txreq *tx,
+ unsigned seq),
+ void (*wakeup)(struct iowait *wait, int reason))
+{
+ wait->count = 0;
+ INIT_LIST_HEAD(&wait->list);
+ INIT_LIST_HEAD(&wait->tx_head);
+ INIT_WORK(&wait->iowork, func);
+ init_waitqueue_head(&wait->wait_dma);
+ atomic_set(&wait->sdma_busy, 0);
+ wait->tx_limit = tx_limit;
+ wait->sleep = sleep;
+ wait->wakeup = wakeup;
+}
+
+/**
+ * iowait_schedule() - initialize wait structure
+ * @wait: wait struct to schedule
+ * @wq: workqueue for schedule
+ */
+static inline void iowait_schedule(
+ struct iowait *wait,
+ struct workqueue_struct *wq)
+{
+ queue_work(wq, &wait->iowork);
+}
+
+/**
+ * iowait_sdma_drain() - wait for DMAs to drain
+ *
+ * @wait: iowait structure
+ *
+ * This will delay until the iowait sdmas have
+ * completed.
+ */
+static inline void iowait_sdma_drain(struct iowait *wait)
+{
+ wait_event(wait->wait_dma, !atomic_read(&wait->sdma_busy));
+}
+
+/**
+ * iowait_drain_wakeup() - trigger iowait_drain() waiter
+ *
+ * @wait: iowait structure
+ *
+ * This will trigger any waiters.
+ */
+static inline void iowait_drain_wakeup(struct iowait *wait)
+{
+ wake_up(&wait->wait_dma);
+}
+
+#endif
diff --git a/drivers/staging/rdma/hfi1/keys.c b/drivers/staging/rdma/hfi1/keys.c
new file mode 100644
index 0000000..f6eff17
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/keys.c
@@ -0,0 +1,411 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "hfi.h"
+
+/**
+ * hfi1_alloc_lkey - allocate an lkey
+ * @mr: memory region that this lkey protects
+ * @dma_region: 0->normal key, 1->restricted DMA key
+ *
+ * Returns 0 if successful, otherwise returns -errno.
+ *
+ * Increments mr reference count as required.
+ *
+ * Sets the lkey field mr for non-dma regions.
+ *
+ */
+
+int hfi1_alloc_lkey(struct hfi1_mregion *mr, int dma_region)
+{
+ unsigned long flags;
+ u32 r;
+ u32 n;
+ int ret = 0;
+ struct hfi1_ibdev *dev = to_idev(mr->pd->device);
+ struct hfi1_lkey_table *rkt = &dev->lk_table;
+
+ hfi1_get_mr(mr);
+ spin_lock_irqsave(&rkt->lock, flags);
+
+ /* special case for dma_mr lkey == 0 */
+ if (dma_region) {
+ struct hfi1_mregion *tmr;
+
+ tmr = rcu_access_pointer(dev->dma_mr);
+ if (!tmr) {
+ rcu_assign_pointer(dev->dma_mr, mr);
+ mr->lkey_published = 1;
+ } else {
+ hfi1_put_mr(mr);
+ }
+ goto success;
+ }
+
+ /* Find the next available LKEY */
+ r = rkt->next;
+ n = r;
+ for (;;) {
+ if (!rcu_access_pointer(rkt->table[r]))
+ break;
+ r = (r + 1) & (rkt->max - 1);
+ if (r == n)
+ goto bail;
+ }
+ rkt->next = (r + 1) & (rkt->max - 1);
+ /*
+ * Make sure lkey is never zero which is reserved to indicate an
+ * unrestricted LKEY.
+ */
+ rkt->gen++;
+ /*
+ * bits are capped in verbs.c to ensure enough bits for
+ * generation number
+ */
+ mr->lkey = (r << (32 - hfi1_lkey_table_size)) |
+ ((((1 << (24 - hfi1_lkey_table_size)) - 1) & rkt->gen)
+ << 8);
+ if (mr->lkey == 0) {
+ mr->lkey |= 1 << 8;
+ rkt->gen++;
+ }
+ rcu_assign_pointer(rkt->table[r], mr);
+ mr->lkey_published = 1;
+success:
+ spin_unlock_irqrestore(&rkt->lock, flags);
+out:
+ return ret;
+bail:
+ hfi1_put_mr(mr);
+ spin_unlock_irqrestore(&rkt->lock, flags);
+ ret = -ENOMEM;
+ goto out;
+}
+
+/**
+ * hfi1_free_lkey - free an lkey
+ * @mr: mr to free from tables
+ */
+void hfi1_free_lkey(struct hfi1_mregion *mr)
+{
+ unsigned long flags;
+ u32 lkey = mr->lkey;
+ u32 r;
+ struct hfi1_ibdev *dev = to_idev(mr->pd->device);
+ struct hfi1_lkey_table *rkt = &dev->lk_table;
+ int freed = 0;
+
+ spin_lock_irqsave(&rkt->lock, flags);
+ if (!mr->lkey_published)
+ goto out;
+ if (lkey == 0)
+ RCU_INIT_POINTER(dev->dma_mr, NULL);
+ else {
+ r = lkey >> (32 - hfi1_lkey_table_size);
+ RCU_INIT_POINTER(rkt->table[r], NULL);
+ }
+ mr->lkey_published = 0;
+ freed++;
+out:
+ spin_unlock_irqrestore(&rkt->lock, flags);
+ if (freed) {
+ synchronize_rcu();
+ hfi1_put_mr(mr);
+ }
+}
+
+/**
+ * hfi1_lkey_ok - check IB SGE for validity and initialize
+ * @rkt: table containing lkey to check SGE against
+ * @pd: protection domain
+ * @isge: outgoing internal SGE
+ * @sge: SGE to check
+ * @acc: access flags
+ *
+ * Return 1 if valid and successful, otherwise returns 0.
+ *
+ * increments the reference count upon success
+ *
+ * Check the IB SGE for validity and initialize our internal version
+ * of it.
+ */
+int hfi1_lkey_ok(struct hfi1_lkey_table *rkt, struct hfi1_pd *pd,
+ struct hfi1_sge *isge, struct ib_sge *sge, int acc)
+{
+ struct hfi1_mregion *mr;
+ unsigned n, m;
+ size_t off;
+
+ /*
+ * We use LKEY == zero for kernel virtual addresses
+ * (see hfi1_get_dma_mr and dma.c).
+ */
+ rcu_read_lock();
+ if (sge->lkey == 0) {
+ struct hfi1_ibdev *dev = to_idev(pd->ibpd.device);
+
+ if (pd->user)
+ goto bail;
+ mr = rcu_dereference(dev->dma_mr);
+ if (!mr)
+ goto bail;
+ atomic_inc(&mr->refcount);
+ rcu_read_unlock();
+
+ isge->mr = mr;
+ isge->vaddr = (void *) sge->addr;
+ isge->length = sge->length;
+ isge->sge_length = sge->length;
+ isge->m = 0;
+ isge->n = 0;
+ goto ok;
+ }
+ mr = rcu_dereference(
+ rkt->table[(sge->lkey >> (32 - hfi1_lkey_table_size))]);
+ if (unlikely(!mr || mr->lkey != sge->lkey || mr->pd != &pd->ibpd))
+ goto bail;
+
+ off = sge->addr - mr->user_base;
+ if (unlikely(sge->addr < mr->user_base ||
+ off + sge->length > mr->length ||
+ (mr->access_flags & acc) != acc))
+ goto bail;
+ atomic_inc(&mr->refcount);
+ rcu_read_unlock();
+
+ off += mr->offset;
+ if (mr->page_shift) {
+ /*
+ page sizes are uniform power of 2 so no loop is necessary
+ entries_spanned_by_off is the number of times the loop below
+ would have executed.
+ */
+ size_t entries_spanned_by_off;
+
+ entries_spanned_by_off = off >> mr->page_shift;
+ off -= (entries_spanned_by_off << mr->page_shift);
+ m = entries_spanned_by_off / HFI1_SEGSZ;
+ n = entries_spanned_by_off % HFI1_SEGSZ;
+ } else {
+ m = 0;
+ n = 0;
+ while (off >= mr->map[m]->segs[n].length) {
+ off -= mr->map[m]->segs[n].length;
+ n++;
+ if (n >= HFI1_SEGSZ) {
+ m++;
+ n = 0;
+ }
+ }
+ }
+ isge->mr = mr;
+ isge->vaddr = mr->map[m]->segs[n].vaddr + off;
+ isge->length = mr->map[m]->segs[n].length - off;
+ isge->sge_length = sge->length;
+ isge->m = m;
+ isge->n = n;
+ok:
+ return 1;
+bail:
+ rcu_read_unlock();
+ return 0;
+}
+
+/**
+ * hfi1_rkey_ok - check the IB virtual address, length, and RKEY
+ * @qp: qp for validation
+ * @sge: SGE state
+ * @len: length of data
+ * @vaddr: virtual address to place data
+ * @rkey: rkey to check
+ * @acc: access flags
+ *
+ * Return 1 if successful, otherwise 0.
+ *
+ * increments the reference count upon success
+ */
+int hfi1_rkey_ok(struct hfi1_qp *qp, struct hfi1_sge *sge,
+ u32 len, u64 vaddr, u32 rkey, int acc)
+{
+ struct hfi1_lkey_table *rkt = &to_idev(qp->ibqp.device)->lk_table;
+ struct hfi1_mregion *mr;
+ unsigned n, m;
+ size_t off;
+
+ /*
+ * We use RKEY == zero for kernel virtual addresses
+ * (see hfi1_get_dma_mr and dma.c).
+ */
+ rcu_read_lock();
+ if (rkey == 0) {
+ struct hfi1_pd *pd = to_ipd(qp->ibqp.pd);
+ struct hfi1_ibdev *dev = to_idev(pd->ibpd.device);
+
+ if (pd->user)
+ goto bail;
+ mr = rcu_dereference(dev->dma_mr);
+ if (!mr)
+ goto bail;
+ atomic_inc(&mr->refcount);
+ rcu_read_unlock();
+
+ sge->mr = mr;
+ sge->vaddr = (void *) vaddr;
+ sge->length = len;
+ sge->sge_length = len;
+ sge->m = 0;
+ sge->n = 0;
+ goto ok;
+ }
+
+ mr = rcu_dereference(
+ rkt->table[(rkey >> (32 - hfi1_lkey_table_size))]);
+ if (unlikely(!mr || mr->lkey != rkey || qp->ibqp.pd != mr->pd))
+ goto bail;
+
+ off = vaddr - mr->iova;
+ if (unlikely(vaddr < mr->iova || off + len > mr->length ||
+ (mr->access_flags & acc) == 0))
+ goto bail;
+ atomic_inc(&mr->refcount);
+ rcu_read_unlock();
+
+ off += mr->offset;
+ if (mr->page_shift) {
+ /*
+ page sizes are uniform power of 2 so no loop is necessary
+ entries_spanned_by_off is the number of times the loop below
+ would have executed.
+ */
+ size_t entries_spanned_by_off;
+
+ entries_spanned_by_off = off >> mr->page_shift;
+ off -= (entries_spanned_by_off << mr->page_shift);
+ m = entries_spanned_by_off / HFI1_SEGSZ;
+ n = entries_spanned_by_off % HFI1_SEGSZ;
+ } else {
+ m = 0;
+ n = 0;
+ while (off >= mr->map[m]->segs[n].length) {
+ off -= mr->map[m]->segs[n].length;
+ n++;
+ if (n >= HFI1_SEGSZ) {
+ m++;
+ n = 0;
+ }
+ }
+ }
+ sge->mr = mr;
+ sge->vaddr = mr->map[m]->segs[n].vaddr + off;
+ sge->length = mr->map[m]->segs[n].length - off;
+ sge->sge_length = len;
+ sge->m = m;
+ sge->n = n;
+ok:
+ return 1;
+bail:
+ rcu_read_unlock();
+ return 0;
+}
+
+/*
+ * Initialize the memory region specified by the work request.
+ */
+int hfi1_fast_reg_mr(struct hfi1_qp *qp, struct ib_send_wr *wr)
+{
+ struct hfi1_lkey_table *rkt = &to_idev(qp->ibqp.device)->lk_table;
+ struct hfi1_pd *pd = to_ipd(qp->ibqp.pd);
+ struct hfi1_mregion *mr;
+ u32 rkey = wr->wr.fast_reg.rkey;
+ unsigned i, n, m;
+ int ret = -EINVAL;
+ unsigned long flags;
+ u64 *page_list;
+ size_t ps;
+
+ spin_lock_irqsave(&rkt->lock, flags);
+ if (pd->user || rkey == 0)
+ goto bail;
+
+ mr = rcu_dereference_protected(
+ rkt->table[(rkey >> (32 - hfi1_lkey_table_size))],
+ lockdep_is_held(&rkt->lock));
+ if (unlikely(mr == NULL || qp->ibqp.pd != mr->pd))
+ goto bail;
+
+ if (wr->wr.fast_reg.page_list_len > mr->max_segs)
+ goto bail;
+
+ ps = 1UL << wr->wr.fast_reg.page_shift;
+ if (wr->wr.fast_reg.length > ps * wr->wr.fast_reg.page_list_len)
+ goto bail;
+
+ mr->user_base = wr->wr.fast_reg.iova_start;
+ mr->iova = wr->wr.fast_reg.iova_start;
+ mr->lkey = rkey;
+ mr->length = wr->wr.fast_reg.length;
+ mr->access_flags = wr->wr.fast_reg.access_flags;
+ page_list = wr->wr.fast_reg.page_list->page_list;
+ m = 0;
+ n = 0;
+ for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) {
+ mr->map[m]->segs[n].vaddr = (void *) page_list[i];
+ mr->map[m]->segs[n].length = ps;
+ if (++n == HFI1_SEGSZ) {
+ m++;
+ n = 0;
+ }
+ }
+
+ ret = 0;
+bail:
+ spin_unlock_irqrestore(&rkt->lock, flags);
+ return ret;
+}
diff --git a/drivers/staging/rdma/hfi1/mad.c b/drivers/staging/rdma/hfi1/mad.c
new file mode 100644
index 0000000..0a18fee
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/mad.c
@@ -0,0 +1,4257 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/net.h>
+#define OPA_NUM_PKEY_BLOCKS_PER_SMP (OPA_SMP_DR_DATA_SIZE \
+ / (OPA_PARTITION_TABLE_BLK_SIZE * sizeof(u16)))
+
+#include "hfi.h"
+#include "mad.h"
+#include "trace.h"
+
+/* the reset value from the FM is supposed to be 0xffff, handle both */
+#define OPA_LINK_WIDTH_RESET_OLD 0x0fff
+#define OPA_LINK_WIDTH_RESET 0xffff
+
+static int reply(struct ib_mad_hdr *smp)
+{
+ /*
+ * The verbs framework will handle the directed/LID route
+ * packet changes.
+ */
+ smp->method = IB_MGMT_METHOD_GET_RESP;
+ if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
+ smp->status |= IB_SMP_DIRECTION;
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
+}
+
+static inline void clear_opa_smp_data(struct opa_smp *smp)
+{
+ void *data = opa_get_smp_data(smp);
+ size_t size = opa_get_smp_data_size(smp);
+
+ memset(data, 0, size);
+}
+
+static void send_trap(struct hfi1_ibport *ibp, void *data, unsigned len)
+{
+ struct ib_mad_send_buf *send_buf;
+ struct ib_mad_agent *agent;
+ struct ib_smp *smp;
+ int ret;
+ unsigned long flags;
+ unsigned long timeout;
+ int pkey_idx;
+ u32 qpn = ppd_from_ibp(ibp)->sm_trap_qp;
+
+ agent = ibp->send_agent;
+ if (!agent)
+ return;
+
+ /* o14-3.2.1 */
+ if (ppd_from_ibp(ibp)->lstate != IB_PORT_ACTIVE)
+ return;
+
+ /* o14-2 */
+ if (ibp->trap_timeout && time_before(jiffies, ibp->trap_timeout))
+ return;
+
+ pkey_idx = hfi1_lookup_pkey_idx(ibp, LIM_MGMT_P_KEY);
+ if (pkey_idx < 0) {
+ pr_warn("%s: failed to find limited mgmt pkey, defaulting 0x%x\n",
+ __func__, hfi1_get_pkey(ibp, 1));
+ pkey_idx = 1;
+ }
+
+ send_buf = ib_create_send_mad(agent, qpn, pkey_idx, 0,
+ IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
+ GFP_ATOMIC, IB_MGMT_BASE_VERSION);
+ if (IS_ERR(send_buf))
+ return;
+
+ smp = send_buf->mad;
+ smp->base_version = IB_MGMT_BASE_VERSION;
+ smp->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+ smp->class_version = 1;
+ smp->method = IB_MGMT_METHOD_TRAP;
+ ibp->tid++;
+ smp->tid = cpu_to_be64(ibp->tid);
+ smp->attr_id = IB_SMP_ATTR_NOTICE;
+ /* o14-1: smp->mkey = 0; */
+ memcpy(smp->data, data, len);
+
+ spin_lock_irqsave(&ibp->lock, flags);
+ if (!ibp->sm_ah) {
+ if (ibp->sm_lid != be16_to_cpu(IB_LID_PERMISSIVE)) {
+ struct ib_ah *ah;
+
+ ah = hfi1_create_qp0_ah(ibp, ibp->sm_lid);
+ if (IS_ERR(ah))
+ ret = PTR_ERR(ah);
+ else {
+ send_buf->ah = ah;
+ ibp->sm_ah = to_iah(ah);
+ ret = 0;
+ }
+ } else
+ ret = -EINVAL;
+ } else {
+ send_buf->ah = &ibp->sm_ah->ibah;
+ ret = 0;
+ }
+ spin_unlock_irqrestore(&ibp->lock, flags);
+
+ if (!ret)
+ ret = ib_post_send_mad(send_buf, NULL);
+ if (!ret) {
+ /* 4.096 usec. */
+ timeout = (4096 * (1UL << ibp->subnet_timeout)) / 1000;
+ ibp->trap_timeout = jiffies + usecs_to_jiffies(timeout);
+ } else {
+ ib_free_send_mad(send_buf);
+ ibp->trap_timeout = 0;
+ }
+}
+
+/*
+ * Send a bad [PQ]_Key trap (ch. 14.3.8).
+ */
+void hfi1_bad_pqkey(struct hfi1_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
+ u32 qp1, u32 qp2, __be16 lid1, __be16 lid2)
+{
+ struct ib_mad_notice_attr data;
+
+ if (trap_num == IB_NOTICE_TRAP_BAD_PKEY)
+ ibp->pkey_violations++;
+ else
+ ibp->qkey_violations++;
+ ibp->n_pkt_drops++;
+
+ /* Send violation trap */
+ data.generic_type = IB_NOTICE_TYPE_SECURITY;
+ data.prod_type_msb = 0;
+ data.prod_type_lsb = IB_NOTICE_PROD_CA;
+ data.trap_num = trap_num;
+ data.issuer_lid = cpu_to_be16(ppd_from_ibp(ibp)->lid);
+ data.toggle_count = 0;
+ memset(&data.details, 0, sizeof(data.details));
+ data.details.ntc_257_258.lid1 = lid1;
+ data.details.ntc_257_258.lid2 = lid2;
+ data.details.ntc_257_258.key = cpu_to_be32(key);
+ data.details.ntc_257_258.sl_qp1 = cpu_to_be32((sl << 28) | qp1);
+ data.details.ntc_257_258.qp2 = cpu_to_be32(qp2);
+
+ send_trap(ibp, &data, sizeof(data));
+}
+
+/*
+ * Send a bad M_Key trap (ch. 14.3.9).
+ */
+static void bad_mkey(struct hfi1_ibport *ibp, struct ib_mad_hdr *mad,
+ __be64 mkey, __be32 dr_slid, u8 return_path[], u8 hop_cnt)
+{
+ struct ib_mad_notice_attr data;
+
+ /* Send violation trap */
+ data.generic_type = IB_NOTICE_TYPE_SECURITY;
+ data.prod_type_msb = 0;
+ data.prod_type_lsb = IB_NOTICE_PROD_CA;
+ data.trap_num = IB_NOTICE_TRAP_BAD_MKEY;
+ data.issuer_lid = cpu_to_be16(ppd_from_ibp(ibp)->lid);
+ data.toggle_count = 0;
+ memset(&data.details, 0, sizeof(data.details));
+ data.details.ntc_256.lid = data.issuer_lid;
+ data.details.ntc_256.method = mad->method;
+ data.details.ntc_256.attr_id = mad->attr_id;
+ data.details.ntc_256.attr_mod = mad->attr_mod;
+ data.details.ntc_256.mkey = mkey;
+ if (mad->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
+
+ data.details.ntc_256.dr_slid = (__force __be16)dr_slid;
+ data.details.ntc_256.dr_trunc_hop = IB_NOTICE_TRAP_DR_NOTICE;
+ if (hop_cnt > ARRAY_SIZE(data.details.ntc_256.dr_rtn_path)) {
+ data.details.ntc_256.dr_trunc_hop |=
+ IB_NOTICE_TRAP_DR_TRUNC;
+ hop_cnt = ARRAY_SIZE(data.details.ntc_256.dr_rtn_path);
+ }
+ data.details.ntc_256.dr_trunc_hop |= hop_cnt;
+ memcpy(data.details.ntc_256.dr_rtn_path, return_path,
+ hop_cnt);
+ }
+
+ send_trap(ibp, &data, sizeof(data));
+}
+
+/*
+ * Send a Port Capability Mask Changed trap (ch. 14.3.11).
+ */
+void hfi1_cap_mask_chg(struct hfi1_ibport *ibp)
+{
+ struct ib_mad_notice_attr data;
+
+ data.generic_type = IB_NOTICE_TYPE_INFO;
+ data.prod_type_msb = 0;
+ data.prod_type_lsb = IB_NOTICE_PROD_CA;
+ data.trap_num = IB_NOTICE_TRAP_CAP_MASK_CHG;
+ data.issuer_lid = cpu_to_be16(ppd_from_ibp(ibp)->lid);
+ data.toggle_count = 0;
+ memset(&data.details, 0, sizeof(data.details));
+ data.details.ntc_144.lid = data.issuer_lid;
+ data.details.ntc_144.new_cap_mask = cpu_to_be32(ibp->port_cap_flags);
+
+ send_trap(ibp, &data, sizeof(data));
+}
+
+/*
+ * Send a System Image GUID Changed trap (ch. 14.3.12).
+ */
+void hfi1_sys_guid_chg(struct hfi1_ibport *ibp)
+{
+ struct ib_mad_notice_attr data;
+
+ data.generic_type = IB_NOTICE_TYPE_INFO;
+ data.prod_type_msb = 0;
+ data.prod_type_lsb = IB_NOTICE_PROD_CA;
+ data.trap_num = IB_NOTICE_TRAP_SYS_GUID_CHG;
+ data.issuer_lid = cpu_to_be16(ppd_from_ibp(ibp)->lid);
+ data.toggle_count = 0;
+ memset(&data.details, 0, sizeof(data.details));
+ data.details.ntc_145.lid = data.issuer_lid;
+ data.details.ntc_145.new_sys_guid = ib_hfi1_sys_image_guid;
+
+ send_trap(ibp, &data, sizeof(data));
+}
+
+/*
+ * Send a Node Description Changed trap (ch. 14.3.13).
+ */
+void hfi1_node_desc_chg(struct hfi1_ibport *ibp)
+{
+ struct ib_mad_notice_attr data;
+
+ data.generic_type = IB_NOTICE_TYPE_INFO;
+ data.prod_type_msb = 0;
+ data.prod_type_lsb = IB_NOTICE_PROD_CA;
+ data.trap_num = IB_NOTICE_TRAP_CAP_MASK_CHG;
+ data.issuer_lid = cpu_to_be16(ppd_from_ibp(ibp)->lid);
+ data.toggle_count = 0;
+ memset(&data.details, 0, sizeof(data.details));
+ data.details.ntc_144.lid = data.issuer_lid;
+ data.details.ntc_144.local_changes = 1;
+ data.details.ntc_144.change_flags = IB_NOTICE_TRAP_NODE_DESC_CHG;
+
+ send_trap(ibp, &data, sizeof(data));
+}
+
+static int __subn_get_opa_nodedesc(struct opa_smp *smp, u32 am,
+ u8 *data, struct ib_device *ibdev,
+ u8 port, u32 *resp_len)
+{
+ struct opa_node_description *nd;
+
+ if (am) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ nd = (struct opa_node_description *)data;
+
+ memcpy(nd->data, ibdev->node_desc, sizeof(nd->data));
+
+ if (resp_len)
+ *resp_len += sizeof(*nd);
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_get_opa_nodeinfo(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct opa_node_info *ni;
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ unsigned pidx = port - 1; /* IB number port from 1, hw from 0 */
+
+ ni = (struct opa_node_info *)data;
+
+ /* GUID 0 is illegal */
+ if (am || pidx >= dd->num_pports || dd->pport[pidx].guid == 0) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ ni->port_guid = cpu_to_be64(dd->pport[pidx].guid);
+ ni->base_version = OPA_MGMT_BASE_VERSION;
+ ni->class_version = OPA_SMI_CLASS_VERSION;
+ ni->node_type = 1; /* channel adapter */
+ ni->num_ports = ibdev->phys_port_cnt;
+ /* This is already in network order */
+ ni->system_image_guid = ib_hfi1_sys_image_guid;
+ /* Use first-port GUID as node */
+ ni->node_guid = cpu_to_be64(dd->pport->guid);
+ ni->partition_cap = cpu_to_be16(hfi1_get_npkeys(dd));
+ ni->device_id = cpu_to_be16(dd->pcidev->device);
+ ni->revision = cpu_to_be32(dd->minrev);
+ ni->local_port_num = port;
+ ni->vendor_id[0] = dd->oui1;
+ ni->vendor_id[1] = dd->oui2;
+ ni->vendor_id[2] = dd->oui3;
+
+ if (resp_len)
+ *resp_len += sizeof(*ni);
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int subn_get_nodeinfo(struct ib_smp *smp, struct ib_device *ibdev,
+ u8 port)
+{
+ struct ib_node_info *nip = (struct ib_node_info *)&smp->data;
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ unsigned pidx = port - 1; /* IB number port from 1, hw from 0 */
+
+ /* GUID 0 is illegal */
+ if (smp->attr_mod || pidx >= dd->num_pports ||
+ dd->pport[pidx].guid == 0)
+ smp->status |= IB_SMP_INVALID_FIELD;
+ else
+ nip->port_guid = cpu_to_be64(dd->pport[pidx].guid);
+
+ nip->base_version = OPA_MGMT_BASE_VERSION;
+ nip->class_version = OPA_SMI_CLASS_VERSION;
+ nip->node_type = 1; /* channel adapter */
+ nip->num_ports = ibdev->phys_port_cnt;
+ /* This is already in network order */
+ nip->sys_guid = ib_hfi1_sys_image_guid;
+ /* Use first-port GUID as node */
+ nip->node_guid = cpu_to_be64(dd->pport->guid);
+ nip->partition_cap = cpu_to_be16(hfi1_get_npkeys(dd));
+ nip->device_id = cpu_to_be16(dd->pcidev->device);
+ nip->revision = cpu_to_be32(dd->minrev);
+ nip->local_port_num = port;
+ nip->vendor_id[0] = dd->oui1;
+ nip->vendor_id[1] = dd->oui2;
+ nip->vendor_id[2] = dd->oui3;
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static void set_link_width_enabled(struct hfi1_pportdata *ppd, u32 w)
+{
+ (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LWID_ENB, w);
+}
+
+static void set_link_width_downgrade_enabled(struct hfi1_pportdata *ppd, u32 w)
+{
+ (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LWID_DG_ENB, w);
+}
+
+static void set_link_speed_enabled(struct hfi1_pportdata *ppd, u32 s)
+{
+ (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_SPD_ENB, s);
+}
+
+static int check_mkey(struct hfi1_ibport *ibp, struct ib_mad_hdr *mad,
+ int mad_flags, __be64 mkey, __be32 dr_slid,
+ u8 return_path[], u8 hop_cnt)
+{
+ int valid_mkey = 0;
+ int ret = 0;
+
+ /* Is the mkey in the process of expiring? */
+ if (ibp->mkey_lease_timeout &&
+ time_after_eq(jiffies, ibp->mkey_lease_timeout)) {
+ /* Clear timeout and mkey protection field. */
+ ibp->mkey_lease_timeout = 0;
+ ibp->mkeyprot = 0;
+ }
+
+ if ((mad_flags & IB_MAD_IGNORE_MKEY) || ibp->mkey == 0 ||
+ ibp->mkey == mkey)
+ valid_mkey = 1;
+
+ /* Unset lease timeout on any valid Get/Set/TrapRepress */
+ if (valid_mkey && ibp->mkey_lease_timeout &&
+ (mad->method == IB_MGMT_METHOD_GET ||
+ mad->method == IB_MGMT_METHOD_SET ||
+ mad->method == IB_MGMT_METHOD_TRAP_REPRESS))
+ ibp->mkey_lease_timeout = 0;
+
+ if (!valid_mkey) {
+ switch (mad->method) {
+ case IB_MGMT_METHOD_GET:
+ /* Bad mkey not a violation below level 2 */
+ if (ibp->mkeyprot < 2)
+ break;
+ case IB_MGMT_METHOD_SET:
+ case IB_MGMT_METHOD_TRAP_REPRESS:
+ if (ibp->mkey_violations != 0xFFFF)
+ ++ibp->mkey_violations;
+ if (!ibp->mkey_lease_timeout && ibp->mkey_lease_period)
+ ibp->mkey_lease_timeout = jiffies +
+ ibp->mkey_lease_period * HZ;
+ /* Generate a trap notice. */
+ bad_mkey(ibp, mad, mkey, dr_slid, return_path,
+ hop_cnt);
+ ret = 1;
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * The SMA caches reads from LCB registers in case the LCB is unavailable.
+ * (The LCB is unavailable in certain link states, for example.)
+ */
+struct lcb_datum {
+ u32 off;
+ u64 val;
+};
+
+static struct lcb_datum lcb_cache[] = {
+ { DC_LCB_STS_ROUND_TRIP_LTP_CNT, 0 },
+};
+
+static int write_lcb_cache(u32 off, u64 val)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lcb_cache); i++) {
+ if (lcb_cache[i].off == off) {
+ lcb_cache[i].val = val;
+ return 0;
+ }
+ }
+
+ pr_warn("%s bad offset 0x%x\n", __func__, off);
+ return -1;
+}
+
+static int read_lcb_cache(u32 off, u64 *val)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lcb_cache); i++) {
+ if (lcb_cache[i].off == off) {
+ *val = lcb_cache[i].val;
+ return 0;
+ }
+ }
+
+ pr_warn("%s bad offset 0x%x\n", __func__, off);
+ return -1;
+}
+
+void read_ltp_rtt(struct hfi1_devdata *dd)
+{
+ u64 reg;
+
+ if (read_lcb_csr(dd, DC_LCB_STS_ROUND_TRIP_LTP_CNT, ®))
+ dd_dev_err(dd, "%s: unable to read LTP RTT\n", __func__);
+ else
+ write_lcb_cache(DC_LCB_STS_ROUND_TRIP_LTP_CNT, reg);
+}
+
+static u8 __opa_porttype(struct hfi1_pportdata *ppd)
+{
+ if (qsfp_mod_present(ppd)) {
+ if (ppd->qsfp_info.cache_valid)
+ return OPA_PORT_TYPE_STANDARD;
+ return OPA_PORT_TYPE_DISCONNECTED;
+ }
+ return OPA_PORT_TYPE_UNKNOWN;
+}
+
+static int __subn_get_opa_portinfo(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ int i;
+ struct hfi1_devdata *dd;
+ struct hfi1_pportdata *ppd;
+ struct hfi1_ibport *ibp;
+ struct opa_port_info *pi = (struct opa_port_info *)data;
+ u8 mtu;
+ u8 credit_rate;
+ u32 state;
+ u32 num_ports = OPA_AM_NPORT(am);
+ u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
+ u32 buffer_units;
+ u64 tmp = 0;
+
+ if (num_ports != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ dd = dd_from_ibdev(ibdev);
+ /* IB numbers ports from 1, hw from 0 */
+ ppd = dd->pport + (port - 1);
+ ibp = &ppd->ibport_data;
+
+ if (ppd->vls_supported/2 > ARRAY_SIZE(pi->neigh_mtu.pvlx_to_mtu) ||
+ ppd->vls_supported > ARRAY_SIZE(dd->vld)) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ pi->lid = cpu_to_be32(ppd->lid);
+
+ /* Only return the mkey if the protection field allows it. */
+ if (!(smp->method == IB_MGMT_METHOD_GET &&
+ ibp->mkey != smp->mkey &&
+ ibp->mkeyprot == 1))
+ pi->mkey = ibp->mkey;
+
+ pi->subnet_prefix = ibp->gid_prefix;
+ pi->sm_lid = cpu_to_be32(ibp->sm_lid);
+ pi->ib_cap_mask = cpu_to_be32(ibp->port_cap_flags);
+ pi->mkey_lease_period = cpu_to_be16(ibp->mkey_lease_period);
+ pi->sm_trap_qp = cpu_to_be32(ppd->sm_trap_qp);
+ pi->sa_qp = cpu_to_be32(ppd->sa_qp);
+
+ pi->link_width.enabled = cpu_to_be16(ppd->link_width_enabled);
+ pi->link_width.supported = cpu_to_be16(ppd->link_width_supported);
+ pi->link_width.active = cpu_to_be16(ppd->link_width_active);
+
+ pi->link_width_downgrade.supported =
+ cpu_to_be16(ppd->link_width_downgrade_supported);
+ pi->link_width_downgrade.enabled =
+ cpu_to_be16(ppd->link_width_downgrade_enabled);
+ pi->link_width_downgrade.tx_active =
+ cpu_to_be16(ppd->link_width_downgrade_tx_active);
+ pi->link_width_downgrade.rx_active =
+ cpu_to_be16(ppd->link_width_downgrade_rx_active);
+
+ pi->link_speed.supported = cpu_to_be16(ppd->link_speed_supported);
+ pi->link_speed.active = cpu_to_be16(ppd->link_speed_active);
+ pi->link_speed.enabled = cpu_to_be16(ppd->link_speed_enabled);
+
+ state = driver_lstate(ppd);
+
+ if (start_of_sm_config && (state == IB_PORT_INIT))
+ ppd->is_sm_config_started = 1;
+
+ pi->port_phys_conf = __opa_porttype(ppd) & 0xf;
+
+#if PI_LED_ENABLE_SUP
+ pi->port_states.ledenable_offlinereason = ppd->neighbor_normal << 4;
+ pi->port_states.ledenable_offlinereason |=
+ ppd->is_sm_config_started << 5;
+ pi->port_states.ledenable_offlinereason |=
+ ppd->offline_disabled_reason & OPA_PI_MASK_OFFLINE_REASON;
+#else
+ pi->port_states.offline_reason = ppd->neighbor_normal << 4;
+ pi->port_states.offline_reason |= ppd->is_sm_config_started << 5;
+ pi->port_states.offline_reason |= ppd->offline_disabled_reason &
+ OPA_PI_MASK_OFFLINE_REASON;
+#endif /* PI_LED_ENABLE_SUP */
+
+ pi->port_states.portphysstate_portstate =
+ (hfi1_ibphys_portstate(ppd) << 4) | state;
+
+ pi->mkeyprotect_lmc = (ibp->mkeyprot << 6) | ppd->lmc;
+
+ memset(pi->neigh_mtu.pvlx_to_mtu, 0, sizeof(pi->neigh_mtu.pvlx_to_mtu));
+ for (i = 0; i < ppd->vls_supported; i++) {
+ mtu = mtu_to_enum(dd->vld[i].mtu, HFI1_DEFAULT_ACTIVE_MTU);
+ if ((i % 2) == 0)
+ pi->neigh_mtu.pvlx_to_mtu[i/2] |= (mtu << 4);
+ else
+ pi->neigh_mtu.pvlx_to_mtu[i/2] |= mtu;
+ }
+ /* don't forget VL 15 */
+ mtu = mtu_to_enum(dd->vld[15].mtu, 2048);
+ pi->neigh_mtu.pvlx_to_mtu[15/2] |= mtu;
+ pi->smsl = ibp->sm_sl & OPA_PI_MASK_SMSL;
+ pi->operational_vls = hfi1_get_ib_cfg(ppd, HFI1_IB_CFG_OP_VLS);
+ pi->partenforce_filterraw |=
+ (ppd->linkinit_reason & OPA_PI_MASK_LINKINIT_REASON);
+ if (ppd->part_enforce & HFI1_PART_ENFORCE_IN)
+ pi->partenforce_filterraw |= OPA_PI_MASK_PARTITION_ENFORCE_IN;
+ if (ppd->part_enforce & HFI1_PART_ENFORCE_OUT)
+ pi->partenforce_filterraw |= OPA_PI_MASK_PARTITION_ENFORCE_OUT;
+ pi->mkey_violations = cpu_to_be16(ibp->mkey_violations);
+ /* P_KeyViolations are counted by hardware. */
+ pi->pkey_violations = cpu_to_be16(ibp->pkey_violations);
+ pi->qkey_violations = cpu_to_be16(ibp->qkey_violations);
+
+ pi->vl.cap = ppd->vls_supported;
+ pi->vl.high_limit = cpu_to_be16(ibp->vl_high_limit);
+ pi->vl.arb_high_cap = (u8)hfi1_get_ib_cfg(ppd, HFI1_IB_CFG_VL_HIGH_CAP);
+ pi->vl.arb_low_cap = (u8)hfi1_get_ib_cfg(ppd, HFI1_IB_CFG_VL_LOW_CAP);
+
+ pi->clientrereg_subnettimeout = ibp->subnet_timeout;
+
+ pi->port_link_mode = cpu_to_be16(OPA_PORT_LINK_MODE_OPA << 10 |
+ OPA_PORT_LINK_MODE_OPA << 5 |
+ OPA_PORT_LINK_MODE_OPA);
+
+ pi->port_ltp_crc_mode = cpu_to_be16(ppd->port_ltp_crc_mode);
+
+ pi->port_mode = cpu_to_be16(
+ ppd->is_active_optimize_enabled ?
+ OPA_PI_MASK_PORT_ACTIVE_OPTOMIZE : 0);
+
+ pi->port_packet_format.supported =
+ cpu_to_be16(OPA_PORT_PACKET_FORMAT_9B);
+ pi->port_packet_format.enabled =
+ cpu_to_be16(OPA_PORT_PACKET_FORMAT_9B);
+
+ /* flit_control.interleave is (OPA V1, version .76):
+ * bits use
+ * ---- ---
+ * 2 res
+ * 2 DistanceSupported
+ * 2 DistanceEnabled
+ * 5 MaxNextLevelTxEnabled
+ * 5 MaxNestLevelRxSupported
+ *
+ * HFI supports only "distance mode 1" (see OPA V1, version .76,
+ * section 9.6.2), so set DistanceSupported, DistanceEnabled
+ * to 0x1.
+ */
+ pi->flit_control.interleave = cpu_to_be16(0x1400);
+
+ pi->link_down_reason = ppd->local_link_down_reason.sma;
+ pi->neigh_link_down_reason = ppd->neigh_link_down_reason.sma;
+ pi->port_error_action = cpu_to_be32(ppd->port_error_action);
+ pi->mtucap = mtu_to_enum(hfi1_max_mtu, IB_MTU_4096);
+
+ /* 32.768 usec. response time (guessing) */
+ pi->resptimevalue = 3;
+
+ pi->local_port_num = port;
+
+ /* buffer info for FM */
+ pi->overall_buffer_space = cpu_to_be16(dd->link_credits);
+
+ pi->neigh_node_guid = cpu_to_be64(ppd->neighbor_guid);
+ pi->neigh_port_num = ppd->neighbor_port_number;
+ pi->port_neigh_mode =
+ (ppd->neighbor_type & OPA_PI_MASK_NEIGH_NODE_TYPE) |
+ (ppd->mgmt_allowed ? OPA_PI_MASK_NEIGH_MGMT_ALLOWED : 0) |
+ (ppd->neighbor_fm_security ?
+ OPA_PI_MASK_NEIGH_FW_AUTH_BYPASS : 0);
+
+ /* HFIs shall always return VL15 credits to their
+ * neighbor in a timely manner, without any credit return pacing.
+ */
+ credit_rate = 0;
+ buffer_units = (dd->vau) & OPA_PI_MASK_BUF_UNIT_BUF_ALLOC;
+ buffer_units |= (dd->vcu << 3) & OPA_PI_MASK_BUF_UNIT_CREDIT_ACK;
+ buffer_units |= (credit_rate << 6) &
+ OPA_PI_MASK_BUF_UNIT_VL15_CREDIT_RATE;
+ buffer_units |= (dd->vl15_init << 11) & OPA_PI_MASK_BUF_UNIT_VL15_INIT;
+ pi->buffer_units = cpu_to_be32(buffer_units);
+
+ pi->opa_cap_mask = cpu_to_be16(OPA_CAP_MASK3_IsSharedSpaceSupported);
+
+ /* HFI supports a replay buffer 128 LTPs in size */
+ pi->replay_depth.buffer = 0x80;
+ /* read the cached value of DC_LCB_STS_ROUND_TRIP_LTP_CNT */
+ read_lcb_cache(DC_LCB_STS_ROUND_TRIP_LTP_CNT, &tmp);
+
+ /* this counter is 16 bits wide, but the replay_depth.wire
+ * variable is only 8 bits */
+ if (tmp > 0xff)
+ tmp = 0xff;
+ pi->replay_depth.wire = tmp;
+
+ if (resp_len)
+ *resp_len += sizeof(struct opa_port_info);
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+/**
+ * get_pkeys - return the PKEY table
+ * @dd: the hfi1_ib device
+ * @port: the IB port number
+ * @pkeys: the pkey table is placed here
+ */
+static int get_pkeys(struct hfi1_devdata *dd, u8 port, u16 *pkeys)
+{
+ struct hfi1_pportdata *ppd = dd->pport + port - 1;
+
+ memcpy(pkeys, ppd->pkeys, sizeof(ppd->pkeys));
+
+ return 0;
+}
+
+static int __subn_get_opa_pkeytable(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ u32 n_blocks_req = OPA_AM_NBLK(am);
+ u32 start_block = am & 0x7ff;
+ __be16 *p;
+ u16 *q;
+ int i;
+ u16 n_blocks_avail;
+ unsigned npkeys = hfi1_get_npkeys(dd);
+ size_t size;
+
+ if (n_blocks_req == 0) {
+ pr_warn("OPA Get PKey AM Invalid : P = %d; B = 0x%x; N = 0x%x\n",
+ port, start_block, n_blocks_req);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ n_blocks_avail = (u16) (npkeys/OPA_PARTITION_TABLE_BLK_SIZE) + 1;
+
+ size = (n_blocks_req * OPA_PARTITION_TABLE_BLK_SIZE) * sizeof(u16);
+
+ if (start_block + n_blocks_req > n_blocks_avail ||
+ n_blocks_req > OPA_NUM_PKEY_BLOCKS_PER_SMP) {
+ pr_warn("OPA Get PKey AM Invalid : s 0x%x; req 0x%x; "
+ "avail 0x%x; blk/smp 0x%lx\n",
+ start_block, n_blocks_req, n_blocks_avail,
+ OPA_NUM_PKEY_BLOCKS_PER_SMP);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ p = (__be16 *) data;
+ q = (u16 *)data;
+ /* get the real pkeys if we are requesting the first block */
+ if (start_block == 0) {
+ get_pkeys(dd, port, q);
+ for (i = 0; i < npkeys; i++)
+ p[i] = cpu_to_be16(q[i]);
+ if (resp_len)
+ *resp_len += size;
+ } else
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+enum {
+ HFI_TRANSITION_DISALLOWED,
+ HFI_TRANSITION_IGNORED,
+ HFI_TRANSITION_ALLOWED,
+ HFI_TRANSITION_UNDEFINED,
+};
+
+/*
+ * Use shortened names to improve readability of
+ * {logical,physical}_state_transitions
+ */
+enum {
+ __D = HFI_TRANSITION_DISALLOWED,
+ __I = HFI_TRANSITION_IGNORED,
+ __A = HFI_TRANSITION_ALLOWED,
+ __U = HFI_TRANSITION_UNDEFINED,
+};
+
+/*
+ * IB_PORTPHYSSTATE_POLLING (2) through OPA_PORTPHYSSTATE_MAX (11) are
+ * represented in physical_state_transitions.
+ */
+#define __N_PHYSTATES (OPA_PORTPHYSSTATE_MAX - IB_PORTPHYSSTATE_POLLING + 1)
+
+/*
+ * Within physical_state_transitions, rows represent "old" states,
+ * columns "new" states, and physical_state_transitions.allowed[old][new]
+ * indicates if the transition from old state to new state is legal (see
+ * OPAg1v1, Table 6-4).
+ */
+static const struct {
+ u8 allowed[__N_PHYSTATES][__N_PHYSTATES];
+} physical_state_transitions = {
+ {
+ /* 2 3 4 5 6 7 8 9 10 11 */
+ /* 2 */ { __A, __A, __D, __D, __D, __D, __D, __D, __D, __D },
+ /* 3 */ { __A, __I, __D, __D, __D, __D, __D, __D, __D, __A },
+ /* 4 */ { __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
+ /* 5 */ { __A, __A, __D, __I, __D, __D, __D, __D, __D, __D },
+ /* 6 */ { __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
+ /* 7 */ { __D, __A, __D, __D, __D, __I, __D, __D, __D, __D },
+ /* 8 */ { __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
+ /* 9 */ { __I, __A, __D, __D, __D, __D, __D, __I, __D, __D },
+ /*10 */ { __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
+ /*11 */ { __D, __A, __D, __D, __D, __D, __D, __D, __D, __I },
+ }
+};
+
+/*
+ * IB_PORT_DOWN (1) through IB_PORT_ACTIVE_DEFER (5) are represented
+ * logical_state_transitions
+ */
+
+#define __N_LOGICAL_STATES (IB_PORT_ACTIVE_DEFER - IB_PORT_DOWN + 1)
+
+/*
+ * Within logical_state_transitions rows represent "old" states,
+ * columns "new" states, and logical_state_transitions.allowed[old][new]
+ * indicates if the transition from old state to new state is legal (see
+ * OPAg1v1, Table 9-12).
+ */
+static const struct {
+ u8 allowed[__N_LOGICAL_STATES][__N_LOGICAL_STATES];
+} logical_state_transitions = {
+ {
+ /* 1 2 3 4 5 */
+ /* 1 */ { __I, __D, __D, __D, __U},
+ /* 2 */ { __D, __I, __A, __D, __U},
+ /* 3 */ { __D, __D, __I, __A, __U},
+ /* 4 */ { __D, __D, __I, __I, __U},
+ /* 5 */ { __U, __U, __U, __U, __U},
+ }
+};
+
+static int logical_transition_allowed(int old, int new)
+{
+ if (old < IB_PORT_NOP || old > IB_PORT_ACTIVE_DEFER ||
+ new < IB_PORT_NOP || new > IB_PORT_ACTIVE_DEFER) {
+ pr_warn("invalid logical state(s) (old %d new %d)\n",
+ old, new);
+ return HFI_TRANSITION_UNDEFINED;
+ }
+
+ if (new == IB_PORT_NOP)
+ return HFI_TRANSITION_ALLOWED; /* always allowed */
+
+ /* adjust states for indexing into logical_state_transitions */
+ old -= IB_PORT_DOWN;
+ new -= IB_PORT_DOWN;
+
+ if (old < 0 || new < 0)
+ return HFI_TRANSITION_UNDEFINED;
+ return logical_state_transitions.allowed[old][new];
+}
+
+static int physical_transition_allowed(int old, int new)
+{
+ if (old < IB_PORTPHYSSTATE_NOP || old > OPA_PORTPHYSSTATE_MAX ||
+ new < IB_PORTPHYSSTATE_NOP || new > OPA_PORTPHYSSTATE_MAX) {
+ pr_warn("invalid physical state(s) (old %d new %d)\n",
+ old, new);
+ return HFI_TRANSITION_UNDEFINED;
+ }
+
+ if (new == IB_PORTPHYSSTATE_NOP)
+ return HFI_TRANSITION_ALLOWED; /* always allowed */
+
+ /* adjust states for indexing into physical_state_transitions */
+ old -= IB_PORTPHYSSTATE_POLLING;
+ new -= IB_PORTPHYSSTATE_POLLING;
+
+ if (old < 0 || new < 0)
+ return HFI_TRANSITION_UNDEFINED;
+ return physical_state_transitions.allowed[old][new];
+}
+
+static int port_states_transition_allowed(struct hfi1_pportdata *ppd,
+ u32 logical_new, u32 physical_new)
+{
+ u32 physical_old = driver_physical_state(ppd);
+ u32 logical_old = driver_logical_state(ppd);
+ int ret, logical_allowed, physical_allowed;
+
+ logical_allowed = ret =
+ logical_transition_allowed(logical_old, logical_new);
+
+ if (ret == HFI_TRANSITION_DISALLOWED ||
+ ret == HFI_TRANSITION_UNDEFINED) {
+ pr_warn("invalid logical state transition %s -> %s\n",
+ opa_lstate_name(logical_old),
+ opa_lstate_name(logical_new));
+ return ret;
+ }
+
+ physical_allowed = ret =
+ physical_transition_allowed(physical_old, physical_new);
+
+ if (ret == HFI_TRANSITION_DISALLOWED ||
+ ret == HFI_TRANSITION_UNDEFINED) {
+ pr_warn("invalid physical state transition %s -> %s\n",
+ opa_pstate_name(physical_old),
+ opa_pstate_name(physical_new));
+ return ret;
+ }
+
+ if (logical_allowed == HFI_TRANSITION_IGNORED &&
+ physical_allowed == HFI_TRANSITION_IGNORED)
+ return HFI_TRANSITION_IGNORED;
+
+ /*
+ * Either physical_allowed or logical_allowed is
+ * HFI_TRANSITION_ALLOWED.
+ */
+ return HFI_TRANSITION_ALLOWED;
+}
+
+static int set_port_states(struct hfi1_pportdata *ppd, struct opa_smp *smp,
+ u32 logical_state, u32 phys_state,
+ int suppress_idle_sma)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ u32 link_state;
+ int ret;
+
+ ret = port_states_transition_allowed(ppd, logical_state, phys_state);
+ if (ret == HFI_TRANSITION_DISALLOWED ||
+ ret == HFI_TRANSITION_UNDEFINED) {
+ /* error message emitted above */
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return 0;
+ }
+
+ if (ret == HFI_TRANSITION_IGNORED)
+ return 0;
+
+ if ((phys_state != IB_PORTPHYSSTATE_NOP) &&
+ !(logical_state == IB_PORT_DOWN ||
+ logical_state == IB_PORT_NOP)){
+ pr_warn("SubnSet(OPA_PortInfo) port state invalid: logical_state 0x%x physical_state 0x%x\n",
+ logical_state, phys_state);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ }
+
+ /*
+ * Logical state changes are summarized in OPAv1g1 spec.,
+ * Table 9-12; physical state changes are summarized in
+ * OPAv1g1 spec., Table 6.4.
+ */
+ switch (logical_state) {
+ case IB_PORT_NOP:
+ if (phys_state == IB_PORTPHYSSTATE_NOP)
+ break;
+ /* FALLTHROUGH */
+ case IB_PORT_DOWN:
+ if (phys_state == IB_PORTPHYSSTATE_NOP)
+ link_state = HLS_DN_DOWNDEF;
+ else if (phys_state == IB_PORTPHYSSTATE_POLLING) {
+ link_state = HLS_DN_POLL;
+ set_link_down_reason(ppd,
+ OPA_LINKDOWN_REASON_FM_BOUNCE, 0,
+ OPA_LINKDOWN_REASON_FM_BOUNCE);
+ } else if (phys_state == IB_PORTPHYSSTATE_DISABLED)
+ link_state = HLS_DN_DISABLE;
+ else {
+ pr_warn("SubnSet(OPA_PortInfo) invalid physical state 0x%x\n",
+ phys_state);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ break;
+ }
+
+ set_link_state(ppd, link_state);
+ if (link_state == HLS_DN_DISABLE &&
+ (ppd->offline_disabled_reason >
+ OPA_LINKDOWN_REASON_SMA_DISABLED ||
+ ppd->offline_disabled_reason ==
+ OPA_LINKDOWN_REASON_NONE))
+ ppd->offline_disabled_reason =
+ OPA_LINKDOWN_REASON_SMA_DISABLED;
+ /*
+ * Don't send a reply if the response would be sent
+ * through the disabled port.
+ */
+ if (link_state == HLS_DN_DISABLE && smp->hop_cnt)
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
+ break;
+ case IB_PORT_ARMED:
+ ret = set_link_state(ppd, HLS_UP_ARMED);
+ if ((ret == 0) && (suppress_idle_sma == 0))
+ send_idle_sma(dd, SMA_IDLE_ARM);
+ break;
+ case IB_PORT_ACTIVE:
+ if (ppd->neighbor_normal) {
+ ret = set_link_state(ppd, HLS_UP_ACTIVE);
+ if (ret == 0)
+ send_idle_sma(dd, SMA_IDLE_ACTIVE);
+ } else {
+ pr_warn("SubnSet(OPA_PortInfo) Cannot move to Active with NeighborNormal 0\n");
+ smp->status |= IB_SMP_INVALID_FIELD;
+ }
+ break;
+ default:
+ pr_warn("SubnSet(OPA_PortInfo) invalid logical state 0x%x\n",
+ logical_state);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ }
+
+ return 0;
+}
+
+/**
+ * subn_set_opa_portinfo - set port information
+ * @smp: the incoming SM packet
+ * @ibdev: the infiniband device
+ * @port: the port on the device
+ *
+ */
+static int __subn_set_opa_portinfo(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct opa_port_info *pi = (struct opa_port_info *)data;
+ struct ib_event event;
+ struct hfi1_devdata *dd;
+ struct hfi1_pportdata *ppd;
+ struct hfi1_ibport *ibp;
+ u8 clientrereg;
+ unsigned long flags;
+ u32 smlid, opa_lid; /* tmp vars to hold LID values */
+ u16 lid;
+ u8 ls_old, ls_new, ps_new;
+ u8 vls;
+ u8 msl;
+ u8 crc_enabled;
+ u16 lse, lwe, mtu;
+ u32 num_ports = OPA_AM_NPORT(am);
+ u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
+ int ret, i, invalid = 0, call_set_mtu = 0;
+ int call_link_downgrade_policy = 0;
+
+ if (num_ports != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ opa_lid = be32_to_cpu(pi->lid);
+ if (opa_lid & 0xFFFF0000) {
+ pr_warn("OPA_PortInfo lid out of range: %X\n", opa_lid);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ goto get_only;
+ }
+
+ lid = (u16)(opa_lid & 0x0000FFFF);
+
+ smlid = be32_to_cpu(pi->sm_lid);
+ if (smlid & 0xFFFF0000) {
+ pr_warn("OPA_PortInfo SM lid out of range: %X\n", smlid);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ goto get_only;
+ }
+ smlid &= 0x0000FFFF;
+
+ clientrereg = (pi->clientrereg_subnettimeout &
+ OPA_PI_MASK_CLIENT_REREGISTER);
+
+ dd = dd_from_ibdev(ibdev);
+ /* IB numbers ports from 1, hw from 0 */
+ ppd = dd->pport + (port - 1);
+ ibp = &ppd->ibport_data;
+ event.device = ibdev;
+ event.element.port_num = port;
+
+ ls_old = driver_lstate(ppd);
+
+ ibp->mkey = pi->mkey;
+ ibp->gid_prefix = pi->subnet_prefix;
+ ibp->mkey_lease_period = be16_to_cpu(pi->mkey_lease_period);
+
+ /* Must be a valid unicast LID address. */
+ if ((lid == 0 && ls_old > IB_PORT_INIT) ||
+ lid >= HFI1_MULTICAST_LID_BASE) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ pr_warn("SubnSet(OPA_PortInfo) lid invalid 0x%x\n",
+ lid);
+ } else if (ppd->lid != lid ||
+ ppd->lmc != (pi->mkeyprotect_lmc & OPA_PI_MASK_LMC)) {
+ if (ppd->lid != lid)
+ hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LID_CHANGE_BIT);
+ if (ppd->lmc != (pi->mkeyprotect_lmc & OPA_PI_MASK_LMC))
+ hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LMC_CHANGE_BIT);
+ hfi1_set_lid(ppd, lid, pi->mkeyprotect_lmc & OPA_PI_MASK_LMC);
+ event.event = IB_EVENT_LID_CHANGE;
+ ib_dispatch_event(&event);
+ }
+
+ msl = pi->smsl & OPA_PI_MASK_SMSL;
+ if (pi->partenforce_filterraw & OPA_PI_MASK_LINKINIT_REASON)
+ ppd->linkinit_reason =
+ (pi->partenforce_filterraw &
+ OPA_PI_MASK_LINKINIT_REASON);
+ /* enable/disable SW pkey checking as per FM control */
+ if (pi->partenforce_filterraw & OPA_PI_MASK_PARTITION_ENFORCE_IN)
+ ppd->part_enforce |= HFI1_PART_ENFORCE_IN;
+ else
+ ppd->part_enforce &= ~HFI1_PART_ENFORCE_IN;
+
+ if (pi->partenforce_filterraw & OPA_PI_MASK_PARTITION_ENFORCE_OUT)
+ ppd->part_enforce |= HFI1_PART_ENFORCE_OUT;
+ else
+ ppd->part_enforce &= ~HFI1_PART_ENFORCE_OUT;
+
+ /* Must be a valid unicast LID address. */
+ if ((smlid == 0 && ls_old > IB_PORT_INIT) ||
+ smlid >= HFI1_MULTICAST_LID_BASE) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ pr_warn("SubnSet(OPA_PortInfo) smlid invalid 0x%x\n", smlid);
+ } else if (smlid != ibp->sm_lid || msl != ibp->sm_sl) {
+ pr_warn("SubnSet(OPA_PortInfo) smlid 0x%x\n", smlid);
+ spin_lock_irqsave(&ibp->lock, flags);
+ if (ibp->sm_ah) {
+ if (smlid != ibp->sm_lid)
+ ibp->sm_ah->attr.dlid = smlid;
+ if (msl != ibp->sm_sl)
+ ibp->sm_ah->attr.sl = msl;
+ }
+ spin_unlock_irqrestore(&ibp->lock, flags);
+ if (smlid != ibp->sm_lid)
+ ibp->sm_lid = smlid;
+ if (msl != ibp->sm_sl)
+ ibp->sm_sl = msl;
+ event.event = IB_EVENT_SM_CHANGE;
+ ib_dispatch_event(&event);
+ }
+
+ if (pi->link_down_reason == 0) {
+ ppd->local_link_down_reason.sma = 0;
+ ppd->local_link_down_reason.latest = 0;
+ }
+
+ if (pi->neigh_link_down_reason == 0) {
+ ppd->neigh_link_down_reason.sma = 0;
+ ppd->neigh_link_down_reason.latest = 0;
+ }
+
+ ppd->sm_trap_qp = be32_to_cpu(pi->sm_trap_qp);
+ ppd->sa_qp = be32_to_cpu(pi->sa_qp);
+
+ ppd->port_error_action = be32_to_cpu(pi->port_error_action);
+ lwe = be16_to_cpu(pi->link_width.enabled);
+ if (lwe) {
+ if (lwe == OPA_LINK_WIDTH_RESET
+ || lwe == OPA_LINK_WIDTH_RESET_OLD)
+ set_link_width_enabled(ppd, ppd->link_width_supported);
+ else if ((lwe & ~ppd->link_width_supported) == 0)
+ set_link_width_enabled(ppd, lwe);
+ else
+ smp->status |= IB_SMP_INVALID_FIELD;
+ }
+ lwe = be16_to_cpu(pi->link_width_downgrade.enabled);
+ /* LWD.E is always applied - 0 means "disabled" */
+ if (lwe == OPA_LINK_WIDTH_RESET
+ || lwe == OPA_LINK_WIDTH_RESET_OLD) {
+ set_link_width_downgrade_enabled(ppd,
+ ppd->link_width_downgrade_supported);
+ } else if ((lwe & ~ppd->link_width_downgrade_supported) == 0) {
+ /* only set and apply if something changed */
+ if (lwe != ppd->link_width_downgrade_enabled) {
+ set_link_width_downgrade_enabled(ppd, lwe);
+ call_link_downgrade_policy = 1;
+ }
+ } else
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ lse = be16_to_cpu(pi->link_speed.enabled);
+ if (lse) {
+ if (lse & be16_to_cpu(pi->link_speed.supported))
+ set_link_speed_enabled(ppd, lse);
+ else
+ smp->status |= IB_SMP_INVALID_FIELD;
+ }
+
+ ibp->mkeyprot = (pi->mkeyprotect_lmc & OPA_PI_MASK_MKEY_PROT_BIT) >> 6;
+ ibp->vl_high_limit = be16_to_cpu(pi->vl.high_limit) & 0xFF;
+ (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_VL_HIGH_LIMIT,
+ ibp->vl_high_limit);
+
+ if (ppd->vls_supported/2 > ARRAY_SIZE(pi->neigh_mtu.pvlx_to_mtu) ||
+ ppd->vls_supported > ARRAY_SIZE(dd->vld)) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+ for (i = 0; i < ppd->vls_supported; i++) {
+ if ((i % 2) == 0)
+ mtu = enum_to_mtu((pi->neigh_mtu.pvlx_to_mtu[i/2] >> 4)
+ & 0xF);
+ else
+ mtu = enum_to_mtu(pi->neigh_mtu.pvlx_to_mtu[i/2] & 0xF);
+ if (mtu == 0xffff) {
+ pr_warn("SubnSet(OPA_PortInfo) mtu invalid %d (0x%x)\n",
+ mtu,
+ (pi->neigh_mtu.pvlx_to_mtu[0] >> 4) & 0xF);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ mtu = hfi1_max_mtu; /* use a valid MTU */
+ }
+ if (dd->vld[i].mtu != mtu) {
+ dd_dev_info(dd,
+ "MTU change on vl %d from %d to %d\n",
+ i, dd->vld[i].mtu, mtu);
+ dd->vld[i].mtu = mtu;
+ call_set_mtu++;
+ }
+ }
+ /* As per OPAV1 spec: VL15 must support and be configured
+ * for operation with a 2048 or larger MTU.
+ */
+ mtu = enum_to_mtu(pi->neigh_mtu.pvlx_to_mtu[15/2] & 0xF);
+ if (mtu < 2048 || mtu == 0xffff)
+ mtu = 2048;
+ if (dd->vld[15].mtu != mtu) {
+ dd_dev_info(dd,
+ "MTU change on vl 15 from %d to %d\n",
+ dd->vld[15].mtu, mtu);
+ dd->vld[15].mtu = mtu;
+ call_set_mtu++;
+ }
+ if (call_set_mtu)
+ set_mtu(ppd);
+
+ /* Set operational VLs */
+ vls = pi->operational_vls & OPA_PI_MASK_OPERATIONAL_VL;
+ if (vls) {
+ if (vls > ppd->vls_supported) {
+ pr_warn("SubnSet(OPA_PortInfo) VL's supported invalid %d\n",
+ pi->operational_vls);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ } else {
+ if (hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_OP_VLS,
+ vls) == -EINVAL)
+ smp->status |= IB_SMP_INVALID_FIELD;
+ }
+ }
+
+ if (pi->mkey_violations == 0)
+ ibp->mkey_violations = 0;
+
+ if (pi->pkey_violations == 0)
+ ibp->pkey_violations = 0;
+
+ if (pi->qkey_violations == 0)
+ ibp->qkey_violations = 0;
+
+ ibp->subnet_timeout =
+ pi->clientrereg_subnettimeout & OPA_PI_MASK_SUBNET_TIMEOUT;
+
+ crc_enabled = be16_to_cpu(pi->port_ltp_crc_mode);
+ crc_enabled >>= 4;
+ crc_enabled &= 0xf;
+
+ if (crc_enabled != 0)
+ ppd->port_crc_mode_enabled = port_ltp_to_cap(crc_enabled);
+
+ ppd->is_active_optimize_enabled =
+ !!(be16_to_cpu(pi->port_mode)
+ & OPA_PI_MASK_PORT_ACTIVE_OPTOMIZE);
+
+ ls_new = pi->port_states.portphysstate_portstate &
+ OPA_PI_MASK_PORT_STATE;
+ ps_new = (pi->port_states.portphysstate_portstate &
+ OPA_PI_MASK_PORT_PHYSICAL_STATE) >> 4;
+
+ if (ls_old == IB_PORT_INIT) {
+ if (start_of_sm_config) {
+ if (ls_new == ls_old || (ls_new == IB_PORT_ARMED))
+ ppd->is_sm_config_started = 1;
+ } else if (ls_new == IB_PORT_ARMED) {
+ if (ppd->is_sm_config_started == 0)
+ invalid = 1;
+ }
+ }
+
+ /* Handle CLIENT_REREGISTER event b/c SM asked us for it */
+ if (clientrereg) {
+ event.event = IB_EVENT_CLIENT_REREGISTER;
+ ib_dispatch_event(&event);
+ }
+
+ /*
+ * Do the port state change now that the other link parameters
+ * have been set.
+ * Changing the port physical state only makes sense if the link
+ * is down or is being set to down.
+ */
+
+ ret = set_port_states(ppd, smp, ls_new, ps_new, invalid);
+ if (ret)
+ return ret;
+
+ ret = __subn_get_opa_portinfo(smp, am, data, ibdev, port, resp_len);
+
+ /* restore re-reg bit per o14-12.2.1 */
+ pi->clientrereg_subnettimeout |= clientrereg;
+
+ /*
+ * Apply the new link downgrade policy. This may result in a link
+ * bounce. Do this after everything else so things are settled.
+ * Possible problem: if setting the port state above fails, then
+ * the policy change is not applied.
+ */
+ if (call_link_downgrade_policy)
+ apply_link_downgrade_policy(ppd, 0);
+
+ return ret;
+
+get_only:
+ return __subn_get_opa_portinfo(smp, am, data, ibdev, port, resp_len);
+}
+
+/**
+ * set_pkeys - set the PKEY table for ctxt 0
+ * @dd: the hfi1_ib device
+ * @port: the IB port number
+ * @pkeys: the PKEY table
+ */
+static int set_pkeys(struct hfi1_devdata *dd, u8 port, u16 *pkeys)
+{
+ struct hfi1_pportdata *ppd;
+ int i;
+ int changed = 0;
+ int update_includes_mgmt_partition = 0;
+
+ /*
+ * IB port one/two always maps to context zero/one,
+ * always a kernel context, no locking needed
+ * If we get here with ppd setup, no need to check
+ * that rcd is valid.
+ */
+ ppd = dd->pport + (port - 1);
+ /*
+ * If the update does not include the management pkey, don't do it.
+ */
+ for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
+ if (pkeys[i] == LIM_MGMT_P_KEY) {
+ update_includes_mgmt_partition = 1;
+ break;
+ }
+ }
+
+ if (!update_includes_mgmt_partition)
+ return 1;
+
+ for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
+ u16 key = pkeys[i];
+ u16 okey = ppd->pkeys[i];
+
+ if (key == okey)
+ continue;
+ /*
+ * The SM gives us the complete PKey table. We have
+ * to ensure that we put the PKeys in the matching
+ * slots.
+ */
+ ppd->pkeys[i] = key;
+ changed = 1;
+ }
+
+ if (changed) {
+ struct ib_event event;
+
+ (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_PKEYS, 0);
+
+ event.event = IB_EVENT_PKEY_CHANGE;
+ event.device = &dd->verbs_dev.ibdev;
+ event.element.port_num = port;
+ ib_dispatch_event(&event);
+ }
+ return 0;
+}
+
+static int __subn_set_opa_pkeytable(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ u32 n_blocks_sent = OPA_AM_NBLK(am);
+ u32 start_block = am & 0x7ff;
+ u16 *p = (u16 *) data;
+ __be16 *q = (__be16 *)data;
+ int i;
+ u16 n_blocks_avail;
+ unsigned npkeys = hfi1_get_npkeys(dd);
+
+ if (n_blocks_sent == 0) {
+ pr_warn("OPA Get PKey AM Invalid : P = %d; B = 0x%x; N = 0x%x\n",
+ port, start_block, n_blocks_sent);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ n_blocks_avail = (u16)(npkeys/OPA_PARTITION_TABLE_BLK_SIZE) + 1;
+
+ if (start_block + n_blocks_sent > n_blocks_avail ||
+ n_blocks_sent > OPA_NUM_PKEY_BLOCKS_PER_SMP) {
+ pr_warn("OPA Set PKey AM Invalid : s 0x%x; req 0x%x; avail 0x%x; blk/smp 0x%lx\n",
+ start_block, n_blocks_sent, n_blocks_avail,
+ OPA_NUM_PKEY_BLOCKS_PER_SMP);
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ for (i = 0; i < n_blocks_sent * OPA_PARTITION_TABLE_BLK_SIZE; i++)
+ p[i] = be16_to_cpu(q[i]);
+
+ if (start_block == 0 && set_pkeys(dd, port, p) != 0) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ return __subn_get_opa_pkeytable(smp, am, data, ibdev, port, resp_len);
+}
+
+static int get_sc2vlt_tables(struct hfi1_devdata *dd, void *data)
+{
+ u64 *val = (u64 *)data;
+
+ *val++ = read_csr(dd, SEND_SC2VLT0);
+ *val++ = read_csr(dd, SEND_SC2VLT1);
+ *val++ = read_csr(dd, SEND_SC2VLT2);
+ *val++ = read_csr(dd, SEND_SC2VLT3);
+ return 0;
+}
+
+#define ILLEGAL_VL 12
+/*
+ * filter_sc2vlt changes mappings to VL15 to ILLEGAL_VL (except
+ * for SC15, which must map to VL15). If we don't remap things this
+ * way it is possible for VL15 counters to increment when we try to
+ * send on a SC which is mapped to an invalid VL.
+ */
+static void filter_sc2vlt(void *data)
+{
+ int i;
+ u8 *pd = (u8 *)data;
+
+ for (i = 0; i < OPA_MAX_SCS; i++) {
+ if (i == 15)
+ continue;
+ if ((pd[i] & 0x1f) == 0xf)
+ pd[i] = ILLEGAL_VL;
+ }
+}
+
+static int set_sc2vlt_tables(struct hfi1_devdata *dd, void *data)
+{
+ u64 *val = (u64 *)data;
+
+ filter_sc2vlt(data);
+
+ write_csr(dd, SEND_SC2VLT0, *val++);
+ write_csr(dd, SEND_SC2VLT1, *val++);
+ write_csr(dd, SEND_SC2VLT2, *val++);
+ write_csr(dd, SEND_SC2VLT3, *val++);
+ write_seqlock_irq(&dd->sc2vl_lock);
+ memcpy(dd->sc2vl, (u64 *)data, sizeof(dd->sc2vl));
+ write_sequnlock_irq(&dd->sc2vl_lock);
+ return 0;
+}
+
+static int __subn_get_opa_sl_to_sc(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ u8 *p = (u8 *)data;
+ size_t size = ARRAY_SIZE(ibp->sl_to_sc); /* == 32 */
+ unsigned i;
+
+ if (am) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ibp->sl_to_sc); i++)
+ *p++ = ibp->sl_to_sc[i];
+
+ if (resp_len)
+ *resp_len += size;
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_set_opa_sl_to_sc(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ u8 *p = (u8 *)data;
+ int i;
+
+ if (am) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ibp->sl_to_sc); i++)
+ ibp->sl_to_sc[i] = *p++;
+
+ return __subn_get_opa_sl_to_sc(smp, am, data, ibdev, port, resp_len);
+}
+
+static int __subn_get_opa_sc_to_sl(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ u8 *p = (u8 *)data;
+ size_t size = ARRAY_SIZE(ibp->sc_to_sl); /* == 32 */
+ unsigned i;
+
+ if (am) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ibp->sc_to_sl); i++)
+ *p++ = ibp->sc_to_sl[i];
+
+ if (resp_len)
+ *resp_len += size;
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_set_opa_sc_to_sl(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ u8 *p = (u8 *)data;
+ int i;
+
+ if (am) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ibp->sc_to_sl); i++)
+ ibp->sc_to_sl[i] = *p++;
+
+ return __subn_get_opa_sc_to_sl(smp, am, data, ibdev, port, resp_len);
+}
+
+static int __subn_get_opa_sc_to_vlt(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ u32 n_blocks = OPA_AM_NBLK(am);
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ void *vp = (void *) data;
+ size_t size = 4 * sizeof(u64);
+
+ if (n_blocks != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ get_sc2vlt_tables(dd, vp);
+
+ if (resp_len)
+ *resp_len += size;
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_set_opa_sc_to_vlt(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ u32 n_blocks = OPA_AM_NBLK(am);
+ int async_update = OPA_AM_ASYNC(am);
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ void *vp = (void *) data;
+ struct hfi1_pportdata *ppd;
+ int lstate;
+
+ if (n_blocks != 1 || async_update) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ /* IB numbers ports from 1, hw from 0 */
+ ppd = dd->pport + (port - 1);
+ lstate = driver_lstate(ppd);
+ /* it's known that async_update is 0 by this point, but include
+ * the explicit check for clarity */
+ if (!async_update &&
+ (lstate == IB_PORT_ARMED || lstate == IB_PORT_ACTIVE)) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ set_sc2vlt_tables(dd, vp);
+
+ return __subn_get_opa_sc_to_vlt(smp, am, data, ibdev, port, resp_len);
+}
+
+static int __subn_get_opa_sc_to_vlnt(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ u32 n_blocks = OPA_AM_NPORT(am);
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_pportdata *ppd;
+ void *vp = (void *) data;
+ int size;
+
+ if (n_blocks != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ ppd = dd->pport + (port - 1);
+
+ size = fm_get_table(ppd, FM_TBL_SC2VLNT, vp);
+
+ if (resp_len)
+ *resp_len += size;
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_set_opa_sc_to_vlnt(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ u32 n_blocks = OPA_AM_NPORT(am);
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_pportdata *ppd;
+ void *vp = (void *) data;
+ int lstate;
+
+ if (n_blocks != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ /* IB numbers ports from 1, hw from 0 */
+ ppd = dd->pport + (port - 1);
+ lstate = driver_lstate(ppd);
+ if (lstate == IB_PORT_ARMED || lstate == IB_PORT_ACTIVE) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ ppd = dd->pport + (port - 1);
+
+ fm_set_table(ppd, FM_TBL_SC2VLNT, vp);
+
+ return __subn_get_opa_sc_to_vlnt(smp, am, data, ibdev, port,
+ resp_len);
+}
+
+static int __subn_get_opa_psi(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ u32 nports = OPA_AM_NPORT(am);
+ u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
+ u32 lstate;
+ struct hfi1_ibport *ibp;
+ struct hfi1_pportdata *ppd;
+ struct opa_port_state_info *psi = (struct opa_port_state_info *) data;
+
+ if (nports != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ ibp = to_iport(ibdev, port);
+ ppd = ppd_from_ibp(ibp);
+
+ lstate = driver_lstate(ppd);
+
+ if (start_of_sm_config && (lstate == IB_PORT_INIT))
+ ppd->is_sm_config_started = 1;
+
+#if PI_LED_ENABLE_SUP
+ psi->port_states.ledenable_offlinereason = ppd->neighbor_normal << 4;
+ psi->port_states.ledenable_offlinereason |=
+ ppd->is_sm_config_started << 5;
+ psi->port_states.ledenable_offlinereason |=
+ ppd->offline_disabled_reason & OPA_PI_MASK_OFFLINE_REASON;
+#else
+ psi->port_states.offline_reason = ppd->neighbor_normal << 4;
+ psi->port_states.offline_reason |= ppd->is_sm_config_started << 5;
+ psi->port_states.offline_reason |= ppd->offline_disabled_reason &
+ OPA_PI_MASK_OFFLINE_REASON;
+#endif /* PI_LED_ENABLE_SUP */
+
+ psi->port_states.portphysstate_portstate =
+ (hfi1_ibphys_portstate(ppd) << 4) | (lstate & 0xf);
+ psi->link_width_downgrade_tx_active =
+ ppd->link_width_downgrade_tx_active;
+ psi->link_width_downgrade_rx_active =
+ ppd->link_width_downgrade_rx_active;
+ if (resp_len)
+ *resp_len += sizeof(struct opa_port_state_info);
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_set_opa_psi(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ u32 nports = OPA_AM_NPORT(am);
+ u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
+ u32 ls_old;
+ u8 ls_new, ps_new;
+ struct hfi1_ibport *ibp;
+ struct hfi1_pportdata *ppd;
+ struct opa_port_state_info *psi = (struct opa_port_state_info *) data;
+ int ret, invalid = 0;
+
+ if (nports != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ ibp = to_iport(ibdev, port);
+ ppd = ppd_from_ibp(ibp);
+
+ ls_old = driver_lstate(ppd);
+
+ ls_new = port_states_to_logical_state(&psi->port_states);
+ ps_new = port_states_to_phys_state(&psi->port_states);
+
+ if (ls_old == IB_PORT_INIT) {
+ if (start_of_sm_config) {
+ if (ls_new == ls_old || (ls_new == IB_PORT_ARMED))
+ ppd->is_sm_config_started = 1;
+ } else if (ls_new == IB_PORT_ARMED) {
+ if (ppd->is_sm_config_started == 0)
+ invalid = 1;
+ }
+ }
+
+ ret = set_port_states(ppd, smp, ls_new, ps_new, invalid);
+ if (ret)
+ return ret;
+
+ if (invalid)
+ smp->status |= IB_SMP_INVALID_FIELD;
+
+ return __subn_get_opa_psi(smp, am, data, ibdev, port, resp_len);
+}
+
+static int __subn_get_opa_cable_info(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ u32 addr = OPA_AM_CI_ADDR(am);
+ u32 len = OPA_AM_CI_LEN(am) + 1;
+ int ret;
+
+#define __CI_PAGE_SIZE (1 << 7) /* 128 bytes */
+#define __CI_PAGE_MASK ~(__CI_PAGE_SIZE - 1)
+#define __CI_PAGE_NUM(a) ((a) & __CI_PAGE_MASK)
+
+ /* check that addr is within spec, and
+ * addr and (addr + len - 1) are on the same "page" */
+ if (addr >= 4096 ||
+ (__CI_PAGE_NUM(addr) != __CI_PAGE_NUM(addr + len - 1))) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ ret = get_cable_info(dd, port, addr, len, data);
+
+ if (ret == -ENODEV) {
+ smp->status |= IB_SMP_UNSUP_METH_ATTR;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ /* The address range for the CableInfo SMA query is wider than the
+ * memory available on the QSFP cable. We want to return a valid
+ * response, albeit zeroed out, for address ranges beyond available
+ * memory but that are within the CableInfo query spec
+ */
+ if (ret < 0 && ret != -ERANGE) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ if (resp_len)
+ *resp_len += len;
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_get_opa_bct(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port, u32 *resp_len)
+{
+ u32 num_ports = OPA_AM_NPORT(am);
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_pportdata *ppd;
+ struct buffer_control *p = (struct buffer_control *) data;
+ int size;
+
+ if (num_ports != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ ppd = dd->pport + (port - 1);
+ size = fm_get_table(ppd, FM_TBL_BUFFER_CONTROL, p);
+ trace_bct_get(dd, p);
+ if (resp_len)
+ *resp_len += size;
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_set_opa_bct(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port, u32 *resp_len)
+{
+ u32 num_ports = OPA_AM_NPORT(am);
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_pportdata *ppd;
+ struct buffer_control *p = (struct buffer_control *) data;
+
+ if (num_ports != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+ ppd = dd->pport + (port - 1);
+ trace_bct_set(dd, p);
+ if (fm_set_table(ppd, FM_TBL_BUFFER_CONTROL, p) < 0) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ return __subn_get_opa_bct(smp, am, data, ibdev, port, resp_len);
+}
+
+static int __subn_get_opa_vl_arb(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_pportdata *ppd = ppd_from_ibp(to_iport(ibdev, port));
+ u32 num_ports = OPA_AM_NPORT(am);
+ u8 section = (am & 0x00ff0000) >> 16;
+ u8 *p = data;
+ int size = 0;
+
+ if (num_ports != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ switch (section) {
+ case OPA_VLARB_LOW_ELEMENTS:
+ size = fm_get_table(ppd, FM_TBL_VL_LOW_ARB, p);
+ break;
+ case OPA_VLARB_HIGH_ELEMENTS:
+ size = fm_get_table(ppd, FM_TBL_VL_HIGH_ARB, p);
+ break;
+ case OPA_VLARB_PREEMPT_ELEMENTS:
+ size = fm_get_table(ppd, FM_TBL_VL_PREEMPT_ELEMS, p);
+ break;
+ case OPA_VLARB_PREEMPT_MATRIX:
+ size = fm_get_table(ppd, FM_TBL_VL_PREEMPT_MATRIX, p);
+ break;
+ default:
+ pr_warn("OPA SubnGet(VL Arb) AM Invalid : 0x%x\n",
+ be32_to_cpu(smp->attr_mod));
+ smp->status |= IB_SMP_INVALID_FIELD;
+ break;
+ }
+
+ if (size > 0 && resp_len)
+ *resp_len += size;
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_set_opa_vl_arb(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_pportdata *ppd = ppd_from_ibp(to_iport(ibdev, port));
+ u32 num_ports = OPA_AM_NPORT(am);
+ u8 section = (am & 0x00ff0000) >> 16;
+ u8 *p = data;
+
+ if (num_ports != 1) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ switch (section) {
+ case OPA_VLARB_LOW_ELEMENTS:
+ (void) fm_set_table(ppd, FM_TBL_VL_LOW_ARB, p);
+ break;
+ case OPA_VLARB_HIGH_ELEMENTS:
+ (void) fm_set_table(ppd, FM_TBL_VL_HIGH_ARB, p);
+ break;
+ /* neither OPA_VLARB_PREEMPT_ELEMENTS, or OPA_VLARB_PREEMPT_MATRIX
+ * can be changed from the default values */
+ case OPA_VLARB_PREEMPT_ELEMENTS:
+ /* FALLTHROUGH */
+ case OPA_VLARB_PREEMPT_MATRIX:
+ smp->status |= IB_SMP_UNSUP_METH_ATTR;
+ break;
+ default:
+ pr_warn("OPA SubnSet(VL Arb) AM Invalid : 0x%x\n",
+ be32_to_cpu(smp->attr_mod));
+ smp->status |= IB_SMP_INVALID_FIELD;
+ break;
+ }
+
+ return __subn_get_opa_vl_arb(smp, am, data, ibdev, port, resp_len);
+}
+
+struct opa_pma_mad {
+ struct ib_mad_hdr mad_hdr;
+ u8 data[2024];
+} __packed;
+
+struct opa_class_port_info {
+ u8 base_version;
+ u8 class_version;
+ __be16 cap_mask;
+ __be32 cap_mask2_resp_time;
+
+ u8 redirect_gid[16];
+ __be32 redirect_tc_fl;
+ __be32 redirect_lid;
+ __be32 redirect_sl_qp;
+ __be32 redirect_qkey;
+
+ u8 trap_gid[16];
+ __be32 trap_tc_fl;
+ __be32 trap_lid;
+ __be32 trap_hl_qp;
+ __be32 trap_qkey;
+
+ __be16 trap_pkey;
+ __be16 redirect_pkey;
+
+ u8 trap_sl_rsvd;
+ u8 reserved[3];
+} __packed;
+
+struct opa_port_status_req {
+ __u8 port_num;
+ __u8 reserved[3];
+ __be32 vl_select_mask;
+};
+
+#define VL_MASK_ALL 0x000080ff
+
+struct opa_port_status_rsp {
+ __u8 port_num;
+ __u8 reserved[3];
+ __be32 vl_select_mask;
+
+ /* Data counters */
+ __be64 port_xmit_data;
+ __be64 port_rcv_data;
+ __be64 port_xmit_pkts;
+ __be64 port_rcv_pkts;
+ __be64 port_multicast_xmit_pkts;
+ __be64 port_multicast_rcv_pkts;
+ __be64 port_xmit_wait;
+ __be64 sw_port_congestion;
+ __be64 port_rcv_fecn;
+ __be64 port_rcv_becn;
+ __be64 port_xmit_time_cong;
+ __be64 port_xmit_wasted_bw;
+ __be64 port_xmit_wait_data;
+ __be64 port_rcv_bubble;
+ __be64 port_mark_fecn;
+ /* Error counters */
+ __be64 port_rcv_constraint_errors;
+ __be64 port_rcv_switch_relay_errors;
+ __be64 port_xmit_discards;
+ __be64 port_xmit_constraint_errors;
+ __be64 port_rcv_remote_physical_errors;
+ __be64 local_link_integrity_errors;
+ __be64 port_rcv_errors;
+ __be64 excessive_buffer_overruns;
+ __be64 fm_config_errors;
+ __be32 link_error_recovery;
+ __be32 link_downed;
+ u8 uncorrectable_errors;
+
+ u8 link_quality_indicator; /* 5res, 3bit */
+ u8 res2[6];
+ struct _vls_pctrs {
+ /* per-VL Data counters */
+ __be64 port_vl_xmit_data;
+ __be64 port_vl_rcv_data;
+ __be64 port_vl_xmit_pkts;
+ __be64 port_vl_rcv_pkts;
+ __be64 port_vl_xmit_wait;
+ __be64 sw_port_vl_congestion;
+ __be64 port_vl_rcv_fecn;
+ __be64 port_vl_rcv_becn;
+ __be64 port_xmit_time_cong;
+ __be64 port_vl_xmit_wasted_bw;
+ __be64 port_vl_xmit_wait_data;
+ __be64 port_vl_rcv_bubble;
+ __be64 port_vl_mark_fecn;
+ __be64 port_vl_xmit_discards;
+ } vls[0]; /* real array size defined by # bits set in vl_select_mask */
+};
+
+enum counter_selects {
+ CS_PORT_XMIT_DATA = (1 << 31),
+ CS_PORT_RCV_DATA = (1 << 30),
+ CS_PORT_XMIT_PKTS = (1 << 29),
+ CS_PORT_RCV_PKTS = (1 << 28),
+ CS_PORT_MCAST_XMIT_PKTS = (1 << 27),
+ CS_PORT_MCAST_RCV_PKTS = (1 << 26),
+ CS_PORT_XMIT_WAIT = (1 << 25),
+ CS_SW_PORT_CONGESTION = (1 << 24),
+ CS_PORT_RCV_FECN = (1 << 23),
+ CS_PORT_RCV_BECN = (1 << 22),
+ CS_PORT_XMIT_TIME_CONG = (1 << 21),
+ CS_PORT_XMIT_WASTED_BW = (1 << 20),
+ CS_PORT_XMIT_WAIT_DATA = (1 << 19),
+ CS_PORT_RCV_BUBBLE = (1 << 18),
+ CS_PORT_MARK_FECN = (1 << 17),
+ CS_PORT_RCV_CONSTRAINT_ERRORS = (1 << 16),
+ CS_PORT_RCV_SWITCH_RELAY_ERRORS = (1 << 15),
+ CS_PORT_XMIT_DISCARDS = (1 << 14),
+ CS_PORT_XMIT_CONSTRAINT_ERRORS = (1 << 13),
+ CS_PORT_RCV_REMOTE_PHYSICAL_ERRORS = (1 << 12),
+ CS_LOCAL_LINK_INTEGRITY_ERRORS = (1 << 11),
+ CS_PORT_RCV_ERRORS = (1 << 10),
+ CS_EXCESSIVE_BUFFER_OVERRUNS = (1 << 9),
+ CS_FM_CONFIG_ERRORS = (1 << 8),
+ CS_LINK_ERROR_RECOVERY = (1 << 7),
+ CS_LINK_DOWNED = (1 << 6),
+ CS_UNCORRECTABLE_ERRORS = (1 << 5),
+};
+
+struct opa_clear_port_status {
+ __be64 port_select_mask[4];
+ __be32 counter_select_mask;
+};
+
+struct opa_aggregate {
+ __be16 attr_id;
+ __be16 err_reqlength; /* 1 bit, 8 res, 7 bit */
+ __be32 attr_mod;
+ u8 data[0];
+};
+
+/* Request contains first two fields, response contains those plus the rest */
+struct opa_port_data_counters_msg {
+ __be64 port_select_mask[4];
+ __be32 vl_select_mask;
+
+ /* Response fields follow */
+ __be32 reserved1;
+ struct _port_dctrs {
+ u8 port_number;
+ u8 reserved2[3];
+ __be32 link_quality_indicator; /* 29res, 3bit */
+
+ /* Data counters */
+ __be64 port_xmit_data;
+ __be64 port_rcv_data;
+ __be64 port_xmit_pkts;
+ __be64 port_rcv_pkts;
+ __be64 port_multicast_xmit_pkts;
+ __be64 port_multicast_rcv_pkts;
+ __be64 port_xmit_wait;
+ __be64 sw_port_congestion;
+ __be64 port_rcv_fecn;
+ __be64 port_rcv_becn;
+ __be64 port_xmit_time_cong;
+ __be64 port_xmit_wasted_bw;
+ __be64 port_xmit_wait_data;
+ __be64 port_rcv_bubble;
+ __be64 port_mark_fecn;
+
+ __be64 port_error_counter_summary;
+ /* Sum of error counts/port */
+
+ struct _vls_dctrs {
+ /* per-VL Data counters */
+ __be64 port_vl_xmit_data;
+ __be64 port_vl_rcv_data;
+ __be64 port_vl_xmit_pkts;
+ __be64 port_vl_rcv_pkts;
+ __be64 port_vl_xmit_wait;
+ __be64 sw_port_vl_congestion;
+ __be64 port_vl_rcv_fecn;
+ __be64 port_vl_rcv_becn;
+ __be64 port_xmit_time_cong;
+ __be64 port_vl_xmit_wasted_bw;
+ __be64 port_vl_xmit_wait_data;
+ __be64 port_vl_rcv_bubble;
+ __be64 port_vl_mark_fecn;
+ } vls[0];
+ /* array size defined by #bits set in vl_select_mask*/
+ } port[1]; /* array size defined by #ports in attribute modifier */
+};
+
+struct opa_port_error_counters64_msg {
+ /* Request contains first two fields, response contains the
+ * whole magilla */
+ __be64 port_select_mask[4];
+ __be32 vl_select_mask;
+
+ /* Response-only fields follow */
+ __be32 reserved1;
+ struct _port_ectrs {
+ u8 port_number;
+ u8 reserved2[7];
+ __be64 port_rcv_constraint_errors;
+ __be64 port_rcv_switch_relay_errors;
+ __be64 port_xmit_discards;
+ __be64 port_xmit_constraint_errors;
+ __be64 port_rcv_remote_physical_errors;
+ __be64 local_link_integrity_errors;
+ __be64 port_rcv_errors;
+ __be64 excessive_buffer_overruns;
+ __be64 fm_config_errors;
+ __be32 link_error_recovery;
+ __be32 link_downed;
+ u8 uncorrectable_errors;
+ u8 reserved3[7];
+ struct _vls_ectrs {
+ __be64 port_vl_xmit_discards;
+ } vls[0];
+ /* array size defined by #bits set in vl_select_mask */
+ } port[1]; /* array size defined by #ports in attribute modifier */
+};
+
+struct opa_port_error_info_msg {
+ __be64 port_select_mask[4];
+ __be32 error_info_select_mask;
+ __be32 reserved1;
+ struct _port_ei {
+
+ u8 port_number;
+ u8 reserved2[7];
+
+ /* PortRcvErrorInfo */
+ struct {
+ u8 status_and_code;
+ union {
+ u8 raw[17];
+ struct {
+ /* EI1to12 format */
+ u8 packet_flit1[8];
+ u8 packet_flit2[8];
+ u8 remaining_flit_bits12;
+ } ei1to12;
+ struct {
+ u8 packet_bytes[8];
+ u8 remaining_flit_bits;
+ } ei13;
+ } ei;
+ u8 reserved3[6];
+ } __packed port_rcv_ei;
+
+ /* ExcessiveBufferOverrunInfo */
+ struct {
+ u8 status_and_sc;
+ u8 reserved4[7];
+ } __packed excessive_buffer_overrun_ei;
+
+ /* PortXmitConstraintErrorInfo */
+ struct {
+ u8 status;
+ u8 reserved5;
+ __be16 pkey;
+ __be32 slid;
+ } __packed port_xmit_constraint_ei;
+
+ /* PortRcvConstraintErrorInfo */
+ struct {
+ u8 status;
+ u8 reserved6;
+ __be16 pkey;
+ __be32 slid;
+ } __packed port_rcv_constraint_ei;
+
+ /* PortRcvSwitchRelayErrorInfo */
+ struct {
+ u8 status_and_code;
+ u8 reserved7[3];
+ __u32 error_info;
+ } __packed port_rcv_switch_relay_ei;
+
+ /* UncorrectableErrorInfo */
+ struct {
+ u8 status_and_code;
+ u8 reserved8;
+ } __packed uncorrectable_ei;
+
+ /* FMConfigErrorInfo */
+ struct {
+ u8 status_and_code;
+ u8 error_info;
+ } __packed fm_config_ei;
+ __u32 reserved9;
+ } port[1]; /* actual array size defined by #ports in attr modifier */
+};
+
+/* opa_port_error_info_msg error_info_select_mask bit definitions */
+enum error_info_selects {
+ ES_PORT_RCV_ERROR_INFO = (1 << 31),
+ ES_EXCESSIVE_BUFFER_OVERRUN_INFO = (1 << 30),
+ ES_PORT_XMIT_CONSTRAINT_ERROR_INFO = (1 << 29),
+ ES_PORT_RCV_CONSTRAINT_ERROR_INFO = (1 << 28),
+ ES_PORT_RCV_SWITCH_RELAY_ERROR_INFO = (1 << 27),
+ ES_UNCORRECTABLE_ERROR_INFO = (1 << 26),
+ ES_FM_CONFIG_ERROR_INFO = (1 << 25)
+};
+
+static int pma_get_opa_classportinfo(struct opa_pma_mad *pmp,
+ struct ib_device *ibdev, u32 *resp_len)
+{
+ struct opa_class_port_info *p =
+ (struct opa_class_port_info *)pmp->data;
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+
+ if (pmp->mad_hdr.attr_mod != 0)
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+
+ p->base_version = OPA_MGMT_BASE_VERSION;
+ p->class_version = OPA_SMI_CLASS_VERSION;
+ /*
+ * Expected response time is 4.096 usec. * 2^18 == 1.073741824 sec.
+ */
+ p->cap_mask2_resp_time = cpu_to_be32(18);
+
+ if (resp_len)
+ *resp_len += sizeof(*p);
+
+ return reply((struct ib_mad_hdr *)pmp);
+}
+
+static void a0_portstatus(struct hfi1_pportdata *ppd,
+ struct opa_port_status_rsp *rsp, u32 vl_select_mask)
+{
+ if (!is_bx(ppd->dd)) {
+ unsigned long vl;
+ int vfi = 0;
+ u64 max_vl_xmit_wait = 0, tmp;
+ u32 vl_all_mask = VL_MASK_ALL;
+ u64 rcv_data, rcv_bubble;
+
+ rcv_data = be64_to_cpu(rsp->port_rcv_data);
+ rcv_bubble = be64_to_cpu(rsp->port_rcv_bubble);
+ /* In the measured time period, calculate the total number
+ * of flits that were received. Subtract out one false
+ * rcv_bubble increment for every 32 received flits but
+ * don't let the number go negative.
+ */
+ if (rcv_bubble >= (rcv_data>>5)) {
+ rcv_bubble -= (rcv_data>>5);
+ rsp->port_rcv_bubble = cpu_to_be64(rcv_bubble);
+ }
+ for_each_set_bit(vl, (unsigned long *)&(vl_select_mask),
+ 8 * sizeof(vl_select_mask)) {
+ rcv_data = be64_to_cpu(rsp->vls[vfi].port_vl_rcv_data);
+ rcv_bubble =
+ be64_to_cpu(rsp->vls[vfi].port_vl_rcv_bubble);
+ if (rcv_bubble >= (rcv_data>>5)) {
+ rcv_bubble -= (rcv_data>>5);
+ rsp->vls[vfi].port_vl_rcv_bubble =
+ cpu_to_be64(rcv_bubble);
+ }
+ vfi++;
+ }
+
+ for_each_set_bit(vl, (unsigned long *)&(vl_all_mask),
+ 8 * sizeof(vl_all_mask)) {
+ tmp = read_port_cntr(ppd, C_TX_WAIT_VL,
+ idx_from_vl(vl));
+ if (tmp > max_vl_xmit_wait)
+ max_vl_xmit_wait = tmp;
+ }
+ rsp->port_xmit_wait = cpu_to_be64(max_vl_xmit_wait);
+ }
+}
+
+
+static int pma_get_opa_portstatus(struct opa_pma_mad *pmp,
+ struct ib_device *ibdev, u8 port, u32 *resp_len)
+{
+ struct opa_port_status_req *req =
+ (struct opa_port_status_req *)pmp->data;
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct opa_port_status_rsp *rsp;
+ u32 vl_select_mask = be32_to_cpu(req->vl_select_mask);
+ unsigned long vl;
+ size_t response_data_size;
+ u32 nports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
+ u8 port_num = req->port_num;
+ u8 num_vls = hweight32(vl_select_mask);
+ struct _vls_pctrs *vlinfo;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ int vfi;
+ u64 tmp, tmp2;
+
+ response_data_size = sizeof(struct opa_port_status_rsp) +
+ num_vls * sizeof(struct _vls_pctrs);
+ if (response_data_size > sizeof(pmp->data)) {
+ pmp->mad_hdr.status |= OPA_PM_STATUS_REQUEST_TOO_LARGE;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ if (nports != 1 || (port_num && port_num != port)
+ || num_vls > OPA_MAX_VLS || (vl_select_mask & ~VL_MASK_ALL)) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ memset(pmp->data, 0, sizeof(pmp->data));
+
+ rsp = (struct opa_port_status_rsp *)pmp->data;
+ if (port_num)
+ rsp->port_num = port_num;
+ else
+ rsp->port_num = port;
+
+ rsp->port_rcv_constraint_errors =
+ cpu_to_be64(read_port_cntr(ppd, C_SW_RCV_CSTR_ERR,
+ CNTR_INVALID_VL));
+
+ hfi1_read_link_quality(dd, &rsp->link_quality_indicator);
+
+ rsp->vl_select_mask = cpu_to_be32(vl_select_mask);
+ rsp->port_xmit_data = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_FLITS,
+ CNTR_INVALID_VL));
+ rsp->port_rcv_data = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FLITS,
+ CNTR_INVALID_VL));
+ rsp->port_rcv_bubble =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BBL, CNTR_INVALID_VL));
+ rsp->port_xmit_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_PKTS,
+ CNTR_INVALID_VL));
+ rsp->port_rcv_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_PKTS,
+ CNTR_INVALID_VL));
+ rsp->port_multicast_xmit_pkts =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_MC_XMIT_PKTS,
+ CNTR_INVALID_VL));
+ rsp->port_multicast_rcv_pkts =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_MC_RCV_PKTS,
+ CNTR_INVALID_VL));
+ rsp->port_xmit_wait =
+ cpu_to_be64(read_port_cntr(ppd, C_TX_WAIT, CNTR_INVALID_VL));
+ rsp->port_rcv_fecn =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN, CNTR_INVALID_VL));
+ rsp->port_rcv_becn =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN, CNTR_INVALID_VL));
+ rsp->port_xmit_discards =
+ cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_DSCD,
+ CNTR_INVALID_VL));
+ rsp->port_xmit_constraint_errors =
+ cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_CSTR_ERR,
+ CNTR_INVALID_VL));
+ rsp->port_rcv_remote_physical_errors =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
+ CNTR_INVALID_VL));
+ tmp = read_dev_cntr(dd, C_DC_RX_REPLAY, CNTR_INVALID_VL);
+ tmp2 = tmp + read_dev_cntr(dd, C_DC_TX_REPLAY, CNTR_INVALID_VL);
+ if (tmp2 < tmp) {
+ /* overflow/wrapped */
+ rsp->local_link_integrity_errors = cpu_to_be64(~0);
+ } else {
+ rsp->local_link_integrity_errors = cpu_to_be64(tmp2);
+ }
+ tmp = read_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL);
+ tmp2 = tmp + read_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT,
+ CNTR_INVALID_VL);
+ if (tmp2 > (u32)UINT_MAX || tmp2 < tmp) {
+ /* overflow/wrapped */
+ rsp->link_error_recovery = cpu_to_be32(~0);
+ } else {
+ rsp->link_error_recovery = cpu_to_be32(tmp2);
+ }
+ rsp->port_rcv_errors =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL));
+ rsp->excessive_buffer_overruns =
+ cpu_to_be64(read_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL));
+ rsp->fm_config_errors =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_FM_CFG_ERR,
+ CNTR_INVALID_VL));
+ rsp->link_downed = cpu_to_be32(read_port_cntr(ppd, C_SW_LINK_DOWN,
+ CNTR_INVALID_VL));
+
+ /* rsp->uncorrectable_errors is 8 bits wide, and it pegs at 0xff */
+ tmp = read_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL);
+ rsp->uncorrectable_errors = tmp < 0x100 ? (tmp & 0xff) : 0xff;
+
+ vlinfo = &(rsp->vls[0]);
+ vfi = 0;
+ /* The vl_select_mask has been checked above, and we know
+ * that it contains only entries which represent valid VLs.
+ * So in the for_each_set_bit() loop below, we don't need
+ * any additional checks for vl.
+ */
+ for_each_set_bit(vl, (unsigned long *)&(vl_select_mask),
+ 8 * sizeof(vl_select_mask)) {
+ memset(vlinfo, 0, sizeof(*vlinfo));
+
+ tmp = read_dev_cntr(dd, C_DC_RX_FLIT_VL, idx_from_vl(vl));
+ rsp->vls[vfi].port_vl_rcv_data = cpu_to_be64(tmp);
+ rsp->vls[vfi].port_vl_rcv_bubble =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BBL_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_rcv_pkts =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RX_PKT_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_xmit_data =
+ cpu_to_be64(read_port_cntr(ppd, C_TX_FLIT_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_xmit_pkts =
+ cpu_to_be64(read_port_cntr(ppd, C_TX_PKT_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_xmit_wait =
+ cpu_to_be64(read_port_cntr(ppd, C_TX_WAIT_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_rcv_fecn =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_rcv_becn =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN_VL,
+ idx_from_vl(vl)));
+
+ vlinfo++;
+ vfi++;
+ }
+
+ a0_portstatus(ppd, rsp, vl_select_mask);
+
+ if (resp_len)
+ *resp_len += response_data_size;
+
+ return reply((struct ib_mad_hdr *)pmp);
+}
+
+static u64 get_error_counter_summary(struct ib_device *ibdev, u8 port)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u64 error_counter_summary = 0, tmp;
+
+ error_counter_summary += read_port_cntr(ppd, C_SW_RCV_CSTR_ERR,
+ CNTR_INVALID_VL);
+ /* port_rcv_switch_relay_errors is 0 for HFIs */
+ error_counter_summary += read_port_cntr(ppd, C_SW_XMIT_DSCD,
+ CNTR_INVALID_VL);
+ error_counter_summary += read_port_cntr(ppd, C_SW_XMIT_CSTR_ERR,
+ CNTR_INVALID_VL);
+ error_counter_summary += read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
+ CNTR_INVALID_VL);
+ error_counter_summary += read_dev_cntr(dd, C_DC_TX_REPLAY,
+ CNTR_INVALID_VL);
+ error_counter_summary += read_dev_cntr(dd, C_DC_RX_REPLAY,
+ CNTR_INVALID_VL);
+ error_counter_summary += read_dev_cntr(dd, C_DC_SEQ_CRC_CNT,
+ CNTR_INVALID_VL);
+ error_counter_summary += read_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT,
+ CNTR_INVALID_VL);
+ error_counter_summary += read_dev_cntr(dd, C_DC_RCV_ERR,
+ CNTR_INVALID_VL);
+ error_counter_summary += read_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL);
+ error_counter_summary += read_dev_cntr(dd, C_DC_FM_CFG_ERR,
+ CNTR_INVALID_VL);
+ /* ppd->link_downed is a 32-bit value */
+ error_counter_summary += read_port_cntr(ppd, C_SW_LINK_DOWN,
+ CNTR_INVALID_VL);
+ tmp = read_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL);
+ /* this is an 8-bit quantity */
+ error_counter_summary += tmp < 0x100 ? (tmp & 0xff) : 0xff;
+
+ return error_counter_summary;
+}
+
+static void a0_datacounters(struct hfi1_devdata *dd, struct _port_dctrs *rsp,
+ u32 vl_select_mask)
+{
+ if (!is_bx(dd)) {
+ unsigned long vl;
+ int vfi = 0;
+ u64 rcv_data, rcv_bubble, sum_vl_xmit_wait = 0;
+
+ rcv_data = be64_to_cpu(rsp->port_rcv_data);
+ rcv_bubble = be64_to_cpu(rsp->port_rcv_bubble);
+ /* In the measured time period, calculate the total number
+ * of flits that were received. Subtract out one false
+ * rcv_bubble increment for every 32 received flits but
+ * don't let the number go negative.
+ */
+ if (rcv_bubble >= (rcv_data>>5)) {
+ rcv_bubble -= (rcv_data>>5);
+ rsp->port_rcv_bubble = cpu_to_be64(rcv_bubble);
+ }
+ for_each_set_bit(vl, (unsigned long *)&(vl_select_mask),
+ 8 * sizeof(vl_select_mask)) {
+ rcv_data = be64_to_cpu(rsp->vls[vfi].port_vl_rcv_data);
+ rcv_bubble =
+ be64_to_cpu(rsp->vls[vfi].port_vl_rcv_bubble);
+ if (rcv_bubble >= (rcv_data>>5)) {
+ rcv_bubble -= (rcv_data>>5);
+ rsp->vls[vfi].port_vl_rcv_bubble =
+ cpu_to_be64(rcv_bubble);
+ }
+ vfi++;
+ }
+ vfi = 0;
+ for_each_set_bit(vl, (unsigned long *)&(vl_select_mask),
+ 8 * sizeof(vl_select_mask)) {
+ u64 tmp = sum_vl_xmit_wait +
+ be64_to_cpu(rsp->vls[vfi++].port_vl_xmit_wait);
+ if (tmp < sum_vl_xmit_wait) {
+ /* we wrapped */
+ sum_vl_xmit_wait = (u64) ~0;
+ break;
+ }
+ sum_vl_xmit_wait = tmp;
+ }
+ if (be64_to_cpu(rsp->port_xmit_wait) > sum_vl_xmit_wait)
+ rsp->port_xmit_wait = cpu_to_be64(sum_vl_xmit_wait);
+ }
+}
+
+static int pma_get_opa_datacounters(struct opa_pma_mad *pmp,
+ struct ib_device *ibdev, u8 port, u32 *resp_len)
+{
+ struct opa_port_data_counters_msg *req =
+ (struct opa_port_data_counters_msg *)pmp->data;
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ struct _port_dctrs *rsp;
+ struct _vls_dctrs *vlinfo;
+ size_t response_data_size;
+ u32 num_ports;
+ u8 num_pslm;
+ u8 lq, num_vls;
+ u64 port_mask;
+ unsigned long port_num;
+ unsigned long vl;
+ u32 vl_select_mask;
+ int vfi;
+
+ num_ports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
+ num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));
+ num_vls = hweight32(be32_to_cpu(req->vl_select_mask));
+ vl_select_mask = be32_to_cpu(req->vl_select_mask);
+
+ if (num_ports != 1 || (vl_select_mask & ~VL_MASK_ALL)) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ /* Sanity check */
+ response_data_size = sizeof(struct opa_port_data_counters_msg) +
+ num_vls * sizeof(struct _vls_dctrs);
+
+ if (response_data_size > sizeof(pmp->data)) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ /*
+ * The bit set in the mask needs to be consistent with the
+ * port the request came in on.
+ */
+ port_mask = be64_to_cpu(req->port_select_mask[3]);
+ port_num = find_first_bit((unsigned long *)&port_mask,
+ sizeof(port_mask));
+
+ if ((u8)port_num != port) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ rsp = (struct _port_dctrs *)&(req->port[0]);
+ memset(rsp, 0, sizeof(*rsp));
+
+ rsp->port_number = port;
+ /*
+ * Note that link_quality_indicator is a 32 bit quantity in
+ * 'datacounters' queries (as opposed to 'portinfo' queries,
+ * where it's a byte).
+ */
+ hfi1_read_link_quality(dd, &lq);
+ rsp->link_quality_indicator = cpu_to_be32((u32)lq);
+
+ /* rsp->sw_port_congestion is 0 for HFIs */
+ /* rsp->port_xmit_time_cong is 0 for HFIs */
+ /* rsp->port_xmit_wasted_bw ??? */
+ /* rsp->port_xmit_wait_data ??? */
+ /* rsp->port_mark_fecn is 0 for HFIs */
+
+ rsp->port_xmit_data = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_FLITS,
+ CNTR_INVALID_VL));
+ rsp->port_rcv_data = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FLITS,
+ CNTR_INVALID_VL));
+ rsp->port_rcv_bubble =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BBL, CNTR_INVALID_VL));
+ rsp->port_xmit_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_PKTS,
+ CNTR_INVALID_VL));
+ rsp->port_rcv_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_PKTS,
+ CNTR_INVALID_VL));
+ rsp->port_multicast_xmit_pkts =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_MC_XMIT_PKTS,
+ CNTR_INVALID_VL));
+ rsp->port_multicast_rcv_pkts =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_MC_RCV_PKTS,
+ CNTR_INVALID_VL));
+ rsp->port_xmit_wait =
+ cpu_to_be64(read_port_cntr(ppd, C_TX_WAIT, CNTR_INVALID_VL));
+ rsp->port_rcv_fecn =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN, CNTR_INVALID_VL));
+ rsp->port_rcv_becn =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN, CNTR_INVALID_VL));
+
+ rsp->port_error_counter_summary =
+ cpu_to_be64(get_error_counter_summary(ibdev, port));
+
+ vlinfo = &(rsp->vls[0]);
+ vfi = 0;
+ /* The vl_select_mask has been checked above, and we know
+ * that it contains only entries which represent valid VLs.
+ * So in the for_each_set_bit() loop below, we don't need
+ * any additional checks for vl.
+ */
+ for_each_set_bit(vl, (unsigned long *)&(vl_select_mask),
+ 8 * sizeof(req->vl_select_mask)) {
+ memset(vlinfo, 0, sizeof(*vlinfo));
+
+ rsp->vls[vfi].port_vl_xmit_data =
+ cpu_to_be64(read_port_cntr(ppd, C_TX_FLIT_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_rcv_data =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RX_FLIT_VL,
+ idx_from_vl(vl)));
+ rsp->vls[vfi].port_vl_rcv_bubble =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BBL_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_xmit_pkts =
+ cpu_to_be64(read_port_cntr(ppd, C_TX_PKT_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_rcv_pkts =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RX_PKT_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_xmit_wait =
+ cpu_to_be64(read_port_cntr(ppd, C_TX_WAIT_VL,
+ idx_from_vl(vl)));
+
+ rsp->vls[vfi].port_vl_rcv_fecn =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN_VL,
+ idx_from_vl(vl)));
+ rsp->vls[vfi].port_vl_rcv_becn =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN_VL,
+ idx_from_vl(vl)));
+
+ /* rsp->port_vl_xmit_time_cong is 0 for HFIs */
+ /* rsp->port_vl_xmit_wasted_bw ??? */
+ /* port_vl_xmit_wait_data - TXE (table 13-9 HFI spec) ???
+ * does this differ from rsp->vls[vfi].port_vl_xmit_wait */
+ /*rsp->vls[vfi].port_vl_mark_fecn =
+ cpu_to_be64(read_csr(dd, DCC_PRF_PORT_VL_MARK_FECN_CNT
+ + offset));
+ */
+ vlinfo++;
+ vfi++;
+ }
+
+ a0_datacounters(dd, rsp, vl_select_mask);
+
+ if (resp_len)
+ *resp_len += response_data_size;
+
+ return reply((struct ib_mad_hdr *)pmp);
+}
+
+static int pma_get_opa_porterrors(struct opa_pma_mad *pmp,
+ struct ib_device *ibdev, u8 port, u32 *resp_len)
+{
+ size_t response_data_size;
+ struct _port_ectrs *rsp;
+ unsigned long port_num;
+ struct opa_port_error_counters64_msg *req;
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ u32 num_ports;
+ u8 num_pslm;
+ u8 num_vls;
+ struct hfi1_ibport *ibp;
+ struct hfi1_pportdata *ppd;
+ struct _vls_ectrs *vlinfo;
+ unsigned long vl;
+ u64 port_mask, tmp, tmp2;
+ u32 vl_select_mask;
+ int vfi;
+
+ req = (struct opa_port_error_counters64_msg *)pmp->data;
+
+ num_ports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
+
+ num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));
+ num_vls = hweight32(be32_to_cpu(req->vl_select_mask));
+
+ if (num_ports != 1 || num_ports != num_pslm) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ response_data_size = sizeof(struct opa_port_error_counters64_msg) +
+ num_vls * sizeof(struct _vls_ectrs);
+
+ if (response_data_size > sizeof(pmp->data)) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+ /*
+ * The bit set in the mask needs to be consistent with the
+ * port the request came in on.
+ */
+ port_mask = be64_to_cpu(req->port_select_mask[3]);
+ port_num = find_first_bit((unsigned long *)&port_mask,
+ sizeof(port_mask));
+
+ if ((u8)port_num != port) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ rsp = (struct _port_ectrs *)&(req->port[0]);
+
+ ibp = to_iport(ibdev, port_num);
+ ppd = ppd_from_ibp(ibp);
+
+ memset(rsp, 0, sizeof(*rsp));
+ rsp->port_number = (u8)port_num;
+
+ rsp->port_rcv_constraint_errors =
+ cpu_to_be64(read_port_cntr(ppd, C_SW_RCV_CSTR_ERR,
+ CNTR_INVALID_VL));
+ /* port_rcv_switch_relay_errors is 0 for HFIs */
+ rsp->port_xmit_discards =
+ cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_DSCD,
+ CNTR_INVALID_VL));
+ rsp->port_rcv_remote_physical_errors =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
+ CNTR_INVALID_VL));
+ tmp = read_dev_cntr(dd, C_DC_RX_REPLAY, CNTR_INVALID_VL);
+ tmp2 = tmp + read_dev_cntr(dd, C_DC_TX_REPLAY, CNTR_INVALID_VL);
+ if (tmp2 < tmp) {
+ /* overflow/wrapped */
+ rsp->local_link_integrity_errors = cpu_to_be64(~0);
+ } else {
+ rsp->local_link_integrity_errors = cpu_to_be64(tmp2);
+ }
+ tmp = read_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL);
+ tmp2 = tmp + read_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT,
+ CNTR_INVALID_VL);
+ if (tmp2 > (u32)UINT_MAX || tmp2 < tmp) {
+ /* overflow/wrapped */
+ rsp->link_error_recovery = cpu_to_be32(~0);
+ } else {
+ rsp->link_error_recovery = cpu_to_be32(tmp2);
+ }
+ rsp->port_xmit_constraint_errors =
+ cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_CSTR_ERR,
+ CNTR_INVALID_VL));
+ rsp->excessive_buffer_overruns =
+ cpu_to_be64(read_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL));
+ rsp->fm_config_errors =
+ cpu_to_be64(read_dev_cntr(dd, C_DC_FM_CFG_ERR,
+ CNTR_INVALID_VL));
+ rsp->link_downed = cpu_to_be32(read_port_cntr(ppd, C_SW_LINK_DOWN,
+ CNTR_INVALID_VL));
+ tmp = read_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL);
+ rsp->uncorrectable_errors = tmp < 0x100 ? (tmp & 0xff) : 0xff;
+
+ vlinfo = (struct _vls_ectrs *)&(rsp->vls[0]);
+ vfi = 0;
+ vl_select_mask = be32_to_cpu(req->vl_select_mask);
+ for_each_set_bit(vl, (unsigned long *)&(vl_select_mask),
+ 8 * sizeof(req->vl_select_mask)) {
+ memset(vlinfo, 0, sizeof(*vlinfo));
+ /* vlinfo->vls[vfi].port_vl_xmit_discards ??? */
+ vlinfo += 1;
+ vfi++;
+ }
+
+ if (resp_len)
+ *resp_len += response_data_size;
+
+ return reply((struct ib_mad_hdr *)pmp);
+}
+
+static int pma_get_opa_errorinfo(struct opa_pma_mad *pmp,
+ struct ib_device *ibdev, u8 port, u32 *resp_len)
+{
+ size_t response_data_size;
+ struct _port_ei *rsp;
+ struct opa_port_error_info_msg *req;
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ u64 port_mask;
+ u32 num_ports;
+ unsigned long port_num;
+ u8 num_pslm;
+ u64 reg;
+
+ req = (struct opa_port_error_info_msg *)pmp->data;
+ rsp = (struct _port_ei *)&(req->port[0]);
+
+ num_ports = OPA_AM_NPORT(be32_to_cpu(pmp->mad_hdr.attr_mod));
+ num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));
+
+ memset(rsp, 0, sizeof(*rsp));
+
+ if (num_ports != 1 || num_ports != num_pslm) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ /* Sanity check */
+ response_data_size = sizeof(struct opa_port_error_info_msg);
+
+ if (response_data_size > sizeof(pmp->data)) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ /*
+ * The bit set in the mask needs to be consistent with the port
+ * the request came in on.
+ */
+ port_mask = be64_to_cpu(req->port_select_mask[3]);
+ port_num = find_first_bit((unsigned long *)&port_mask,
+ sizeof(port_mask));
+
+ if ((u8)port_num != port) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ /* PortRcvErrorInfo */
+ rsp->port_rcv_ei.status_and_code =
+ dd->err_info_rcvport.status_and_code;
+ memcpy(&rsp->port_rcv_ei.ei.ei1to12.packet_flit1,
+ &dd->err_info_rcvport.packet_flit1, sizeof(u64));
+ memcpy(&rsp->port_rcv_ei.ei.ei1to12.packet_flit2,
+ &dd->err_info_rcvport.packet_flit2, sizeof(u64));
+
+ /* ExcessiverBufferOverrunInfo */
+ reg = read_csr(dd, RCV_ERR_INFO);
+ if (reg & RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SMASK) {
+ /* if the RcvExcessBufferOverrun bit is set, save SC of
+ * first pkt that encountered an excess buffer overrun */
+ u8 tmp = (u8)reg;
+
+ tmp &= RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SC_SMASK;
+ tmp <<= 2;
+ rsp->excessive_buffer_overrun_ei.status_and_sc = tmp;
+ /* set the status bit */
+ rsp->excessive_buffer_overrun_ei.status_and_sc |= 0x80;
+ }
+
+ rsp->port_xmit_constraint_ei.status =
+ dd->err_info_xmit_constraint.status;
+ rsp->port_xmit_constraint_ei.pkey =
+ cpu_to_be16(dd->err_info_xmit_constraint.pkey);
+ rsp->port_xmit_constraint_ei.slid =
+ cpu_to_be32(dd->err_info_xmit_constraint.slid);
+
+ rsp->port_rcv_constraint_ei.status =
+ dd->err_info_rcv_constraint.status;
+ rsp->port_rcv_constraint_ei.pkey =
+ cpu_to_be16(dd->err_info_rcv_constraint.pkey);
+ rsp->port_rcv_constraint_ei.slid =
+ cpu_to_be32(dd->err_info_rcv_constraint.slid);
+
+ /* UncorrectableErrorInfo */
+ rsp->uncorrectable_ei.status_and_code = dd->err_info_uncorrectable;
+
+ /* FMConfigErrorInfo */
+ rsp->fm_config_ei.status_and_code = dd->err_info_fmconfig;
+
+ if (resp_len)
+ *resp_len += response_data_size;
+
+ return reply((struct ib_mad_hdr *)pmp);
+}
+
+static int pma_set_opa_portstatus(struct opa_pma_mad *pmp,
+ struct ib_device *ibdev, u8 port, u32 *resp_len)
+{
+ struct opa_clear_port_status *req =
+ (struct opa_clear_port_status *)pmp->data;
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u32 nports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
+ u64 portn = be64_to_cpu(req->port_select_mask[3]);
+ u32 counter_select = be32_to_cpu(req->counter_select_mask);
+ u32 vl_select_mask = VL_MASK_ALL; /* clear all per-vl cnts */
+ unsigned long vl;
+
+ if ((nports != 1) || (portn != 1 << port)) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+ /*
+ * only counters returned by pma_get_opa_portstatus() are
+ * handled, so when pma_get_opa_portstatus() gets a fix,
+ * the corresponding change should be made here as well.
+ */
+
+ if (counter_select & CS_PORT_XMIT_DATA)
+ write_dev_cntr(dd, C_DC_XMIT_FLITS, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_PORT_RCV_DATA)
+ write_dev_cntr(dd, C_DC_RCV_FLITS, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_PORT_XMIT_PKTS)
+ write_dev_cntr(dd, C_DC_XMIT_PKTS, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_PORT_RCV_PKTS)
+ write_dev_cntr(dd, C_DC_RCV_PKTS, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_PORT_MCAST_XMIT_PKTS)
+ write_dev_cntr(dd, C_DC_MC_XMIT_PKTS, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_PORT_MCAST_RCV_PKTS)
+ write_dev_cntr(dd, C_DC_MC_RCV_PKTS, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_PORT_XMIT_WAIT)
+ write_port_cntr(ppd, C_TX_WAIT, CNTR_INVALID_VL, 0);
+
+ /* ignore cs_sw_portCongestion for HFIs */
+
+ if (counter_select & CS_PORT_RCV_FECN)
+ write_dev_cntr(dd, C_DC_RCV_FCN, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_PORT_RCV_BECN)
+ write_dev_cntr(dd, C_DC_RCV_BCN, CNTR_INVALID_VL, 0);
+
+ /* ignore cs_port_xmit_time_cong for HFIs */
+ /* ignore cs_port_xmit_wasted_bw for now */
+ /* ignore cs_port_xmit_wait_data for now */
+ if (counter_select & CS_PORT_RCV_BUBBLE)
+ write_dev_cntr(dd, C_DC_RCV_BBL, CNTR_INVALID_VL, 0);
+
+ /* Only applicable for switch */
+ /*if (counter_select & CS_PORT_MARK_FECN)
+ write_csr(dd, DCC_PRF_PORT_MARK_FECN_CNT, 0);*/
+
+ if (counter_select & CS_PORT_RCV_CONSTRAINT_ERRORS)
+ write_port_cntr(ppd, C_SW_RCV_CSTR_ERR, CNTR_INVALID_VL, 0);
+
+ /* ignore cs_port_rcv_switch_relay_errors for HFIs */
+ if (counter_select & CS_PORT_XMIT_DISCARDS)
+ write_port_cntr(ppd, C_SW_XMIT_DSCD, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_PORT_XMIT_CONSTRAINT_ERRORS)
+ write_port_cntr(ppd, C_SW_XMIT_CSTR_ERR, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_PORT_RCV_REMOTE_PHYSICAL_ERRORS)
+ write_dev_cntr(dd, C_DC_RMT_PHY_ERR, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_LOCAL_LINK_INTEGRITY_ERRORS) {
+ write_dev_cntr(dd, C_DC_TX_REPLAY, CNTR_INVALID_VL, 0);
+ write_dev_cntr(dd, C_DC_RX_REPLAY, CNTR_INVALID_VL, 0);
+ }
+
+ if (counter_select & CS_LINK_ERROR_RECOVERY) {
+ write_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL, 0);
+ write_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT,
+ CNTR_INVALID_VL, 0);
+ }
+
+ if (counter_select & CS_PORT_RCV_ERRORS)
+ write_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_EXCESSIVE_BUFFER_OVERRUNS) {
+ write_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL, 0);
+ dd->rcv_ovfl_cnt = 0;
+ }
+
+ if (counter_select & CS_FM_CONFIG_ERRORS)
+ write_dev_cntr(dd, C_DC_FM_CFG_ERR, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_LINK_DOWNED)
+ write_port_cntr(ppd, C_SW_LINK_DOWN, CNTR_INVALID_VL, 0);
+
+ if (counter_select & CS_UNCORRECTABLE_ERRORS)
+ write_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL, 0);
+
+ for_each_set_bit(vl, (unsigned long *)&(vl_select_mask),
+ 8 * sizeof(vl_select_mask)) {
+
+ if (counter_select & CS_PORT_XMIT_DATA)
+ write_port_cntr(ppd, C_TX_FLIT_VL, idx_from_vl(vl), 0);
+
+ if (counter_select & CS_PORT_RCV_DATA)
+ write_dev_cntr(dd, C_DC_RX_FLIT_VL, idx_from_vl(vl), 0);
+
+ if (counter_select & CS_PORT_XMIT_PKTS)
+ write_port_cntr(ppd, C_TX_PKT_VL, idx_from_vl(vl), 0);
+
+ if (counter_select & CS_PORT_RCV_PKTS)
+ write_dev_cntr(dd, C_DC_RX_PKT_VL, idx_from_vl(vl), 0);
+
+ if (counter_select & CS_PORT_XMIT_WAIT)
+ write_port_cntr(ppd, C_TX_WAIT_VL, idx_from_vl(vl), 0);
+
+ /* sw_port_vl_congestion is 0 for HFIs */
+ if (counter_select & CS_PORT_RCV_FECN)
+ write_dev_cntr(dd, C_DC_RCV_FCN_VL, idx_from_vl(vl), 0);
+
+ if (counter_select & CS_PORT_RCV_BECN)
+ write_dev_cntr(dd, C_DC_RCV_BCN_VL, idx_from_vl(vl), 0);
+
+ /* port_vl_xmit_time_cong is 0 for HFIs */
+ /* port_vl_xmit_wasted_bw ??? */
+ /* port_vl_xmit_wait_data - TXE (table 13-9 HFI spec) ??? */
+ if (counter_select & CS_PORT_RCV_BUBBLE)
+ write_dev_cntr(dd, C_DC_RCV_BBL_VL, idx_from_vl(vl), 0);
+
+ /*if (counter_select & CS_PORT_MARK_FECN)
+ write_csr(dd, DCC_PRF_PORT_VL_MARK_FECN_CNT + offset, 0);
+ */
+ /* port_vl_xmit_discards ??? */
+ }
+
+ if (resp_len)
+ *resp_len += sizeof(*req);
+
+ return reply((struct ib_mad_hdr *)pmp);
+}
+
+static int pma_set_opa_errorinfo(struct opa_pma_mad *pmp,
+ struct ib_device *ibdev, u8 port, u32 *resp_len)
+{
+ struct _port_ei *rsp;
+ struct opa_port_error_info_msg *req;
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ u64 port_mask;
+ u32 num_ports;
+ unsigned long port_num;
+ u8 num_pslm;
+ u32 error_info_select;
+
+ req = (struct opa_port_error_info_msg *)pmp->data;
+ rsp = (struct _port_ei *)&(req->port[0]);
+
+ num_ports = OPA_AM_NPORT(be32_to_cpu(pmp->mad_hdr.attr_mod));
+ num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));
+
+ memset(rsp, 0, sizeof(*rsp));
+
+ if (num_ports != 1 || num_ports != num_pslm) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ /*
+ * The bit set in the mask needs to be consistent with the port
+ * the request came in on.
+ */
+ port_mask = be64_to_cpu(req->port_select_mask[3]);
+ port_num = find_first_bit((unsigned long *)&port_mask,
+ sizeof(port_mask));
+
+ if ((u8)port_num != port) {
+ pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ error_info_select = be32_to_cpu(req->error_info_select_mask);
+
+ /* PortRcvErrorInfo */
+ if (error_info_select & ES_PORT_RCV_ERROR_INFO)
+ /* turn off status bit */
+ dd->err_info_rcvport.status_and_code &= ~OPA_EI_STATUS_SMASK;
+
+ /* ExcessiverBufferOverrunInfo */
+ if (error_info_select & ES_EXCESSIVE_BUFFER_OVERRUN_INFO)
+ /* status bit is essentially kept in the h/w - bit 5 of
+ * RCV_ERR_INFO */
+ write_csr(dd, RCV_ERR_INFO,
+ RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SMASK);
+
+ if (error_info_select & ES_PORT_XMIT_CONSTRAINT_ERROR_INFO)
+ dd->err_info_xmit_constraint.status &= ~OPA_EI_STATUS_SMASK;
+
+ if (error_info_select & ES_PORT_RCV_CONSTRAINT_ERROR_INFO)
+ dd->err_info_rcv_constraint.status &= ~OPA_EI_STATUS_SMASK;
+
+ /* UncorrectableErrorInfo */
+ if (error_info_select & ES_UNCORRECTABLE_ERROR_INFO)
+ /* turn off status bit */
+ dd->err_info_uncorrectable &= ~OPA_EI_STATUS_SMASK;
+
+ /* FMConfigErrorInfo */
+ if (error_info_select & ES_FM_CONFIG_ERROR_INFO)
+ /* turn off status bit */
+ dd->err_info_fmconfig &= ~OPA_EI_STATUS_SMASK;
+
+ if (resp_len)
+ *resp_len += sizeof(*req);
+
+ return reply((struct ib_mad_hdr *)pmp);
+}
+
+struct opa_congestion_info_attr {
+ __be16 congestion_info;
+ u8 control_table_cap; /* Multiple of 64 entry unit CCTs */
+ u8 congestion_log_length;
+} __packed;
+
+static int __subn_get_opa_cong_info(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct opa_congestion_info_attr *p =
+ (struct opa_congestion_info_attr *)data;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+
+ p->congestion_info = 0;
+ p->control_table_cap = ppd->cc_max_table_entries;
+ p->congestion_log_length = OPA_CONG_LOG_ELEMS;
+
+ if (resp_len)
+ *resp_len += sizeof(*p);
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_get_opa_cong_setting(struct opa_smp *smp, u32 am,
+ u8 *data,
+ struct ib_device *ibdev,
+ u8 port, u32 *resp_len)
+{
+ int i;
+ struct opa_congestion_setting_attr *p =
+ (struct opa_congestion_setting_attr *) data;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ struct opa_congestion_setting_entry_shadow *entries;
+ struct cc_state *cc_state;
+
+ rcu_read_lock();
+
+ cc_state = get_cc_state(ppd);
+
+ if (cc_state == NULL) {
+ rcu_read_unlock();
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ entries = cc_state->cong_setting.entries;
+ p->port_control = cpu_to_be16(cc_state->cong_setting.port_control);
+ p->control_map = cpu_to_be32(cc_state->cong_setting.control_map);
+ for (i = 0; i < OPA_MAX_SLS; i++) {
+ p->entries[i].ccti_increase = entries[i].ccti_increase;
+ p->entries[i].ccti_timer = cpu_to_be16(entries[i].ccti_timer);
+ p->entries[i].trigger_threshold =
+ entries[i].trigger_threshold;
+ p->entries[i].ccti_min = entries[i].ccti_min;
+ }
+
+ rcu_read_unlock();
+
+ if (resp_len)
+ *resp_len += sizeof(*p);
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_set_opa_cong_setting(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct opa_congestion_setting_attr *p =
+ (struct opa_congestion_setting_attr *) data;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ struct opa_congestion_setting_entry_shadow *entries;
+ int i;
+
+ ppd->cc_sl_control_map = be32_to_cpu(p->control_map);
+
+ entries = ppd->congestion_entries;
+ for (i = 0; i < OPA_MAX_SLS; i++) {
+ entries[i].ccti_increase = p->entries[i].ccti_increase;
+ entries[i].ccti_timer = be16_to_cpu(p->entries[i].ccti_timer);
+ entries[i].trigger_threshold =
+ p->entries[i].trigger_threshold;
+ entries[i].ccti_min = p->entries[i].ccti_min;
+ }
+
+ return __subn_get_opa_cong_setting(smp, am, data, ibdev, port,
+ resp_len);
+}
+
+static int __subn_get_opa_hfi1_cong_log(struct opa_smp *smp, u32 am,
+ u8 *data, struct ib_device *ibdev,
+ u8 port, u32 *resp_len)
+{
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ struct opa_hfi1_cong_log *cong_log = (struct opa_hfi1_cong_log *)data;
+ s64 ts;
+ int i;
+
+ if (am != 0) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ spin_lock(&ppd->cc_log_lock);
+
+ cong_log->log_type = OPA_CC_LOG_TYPE_HFI;
+ cong_log->congestion_flags = 0;
+ cong_log->threshold_event_counter =
+ cpu_to_be16(ppd->threshold_event_counter);
+ memcpy(cong_log->threshold_cong_event_map,
+ ppd->threshold_cong_event_map,
+ sizeof(cong_log->threshold_cong_event_map));
+ /* keep timestamp in units of 1.024 usec */
+ ts = ktime_to_ns(ktime_get()) / 1024;
+ cong_log->current_time_stamp = cpu_to_be32(ts);
+ for (i = 0; i < OPA_CONG_LOG_ELEMS; i++) {
+ struct opa_hfi1_cong_log_event_internal *cce =
+ &ppd->cc_events[ppd->cc_mad_idx++];
+ if (ppd->cc_mad_idx == OPA_CONG_LOG_ELEMS)
+ ppd->cc_mad_idx = 0;
+ /*
+ * Entries which are older than twice the time
+ * required to wrap the counter are supposed to
+ * be zeroed (CA10-49 IBTA, release 1.2.1, V1).
+ */
+ if ((u64)(ts - cce->timestamp) > (2 * UINT_MAX))
+ continue;
+ memcpy(cong_log->events[i].local_qp_cn_entry, &cce->lqpn, 3);
+ memcpy(cong_log->events[i].remote_qp_number_cn_entry,
+ &cce->rqpn, 3);
+ cong_log->events[i].sl_svc_type_cn_entry =
+ ((cce->sl & 0x1f) << 3) | (cce->svc_type & 0x7);
+ cong_log->events[i].remote_lid_cn_entry =
+ cpu_to_be32(cce->rlid);
+ cong_log->events[i].timestamp_cn_entry =
+ cpu_to_be32(cce->timestamp);
+ }
+
+ /*
+ * Reset threshold_cong_event_map, and threshold_event_counter
+ * to 0 when log is read.
+ */
+ memset(ppd->threshold_cong_event_map, 0x0,
+ sizeof(ppd->threshold_cong_event_map));
+ ppd->threshold_event_counter = 0;
+
+ spin_unlock(&ppd->cc_log_lock);
+
+ if (resp_len)
+ *resp_len += sizeof(struct opa_hfi1_cong_log);
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_get_opa_cc_table(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct ib_cc_table_attr *cc_table_attr =
+ (struct ib_cc_table_attr *) data;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u32 start_block = OPA_AM_START_BLK(am);
+ u32 n_blocks = OPA_AM_NBLK(am);
+ struct ib_cc_table_entry_shadow *entries;
+ int i, j;
+ u32 sentry, eentry;
+ struct cc_state *cc_state;
+
+ /* sanity check n_blocks, start_block */
+ if (n_blocks == 0 ||
+ start_block + n_blocks > ppd->cc_max_table_entries) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ rcu_read_lock();
+
+ cc_state = get_cc_state(ppd);
+
+ if (cc_state == NULL) {
+ rcu_read_unlock();
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ sentry = start_block * IB_CCT_ENTRIES;
+ eentry = sentry + (IB_CCT_ENTRIES * n_blocks);
+
+ cc_table_attr->ccti_limit = cpu_to_be16(cc_state->cct.ccti_limit);
+
+ entries = cc_state->cct.entries;
+
+ /* return n_blocks, though the last block may not be full */
+ for (j = 0, i = sentry; i < eentry; j++, i++)
+ cc_table_attr->ccti_entries[j].entry =
+ cpu_to_be16(entries[i].entry);
+
+ rcu_read_unlock();
+
+ if (resp_len)
+ *resp_len += sizeof(u16)*(IB_CCT_ENTRIES * n_blocks + 1);
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+void cc_state_reclaim(struct rcu_head *rcu)
+{
+ struct cc_state *cc_state = container_of(rcu, struct cc_state, rcu);
+
+ kfree(cc_state);
+}
+
+static int __subn_set_opa_cc_table(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct ib_cc_table_attr *p = (struct ib_cc_table_attr *) data;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u32 start_block = OPA_AM_START_BLK(am);
+ u32 n_blocks = OPA_AM_NBLK(am);
+ struct ib_cc_table_entry_shadow *entries;
+ int i, j;
+ u32 sentry, eentry;
+ u16 ccti_limit;
+ struct cc_state *old_cc_state, *new_cc_state;
+
+ /* sanity check n_blocks, start_block */
+ if (n_blocks == 0 ||
+ start_block + n_blocks > ppd->cc_max_table_entries) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ sentry = start_block * IB_CCT_ENTRIES;
+ eentry = sentry + ((n_blocks - 1) * IB_CCT_ENTRIES) +
+ (be16_to_cpu(p->ccti_limit)) % IB_CCT_ENTRIES + 1;
+
+ /* sanity check ccti_limit */
+ ccti_limit = be16_to_cpu(p->ccti_limit);
+ if (ccti_limit + 1 > eentry) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ new_cc_state = kzalloc(sizeof(*new_cc_state), GFP_KERNEL);
+ if (new_cc_state == NULL)
+ goto getit;
+
+ spin_lock(&ppd->cc_state_lock);
+
+ old_cc_state = get_cc_state(ppd);
+
+ if (old_cc_state == NULL) {
+ spin_unlock(&ppd->cc_state_lock);
+ kfree(new_cc_state);
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ *new_cc_state = *old_cc_state;
+
+ new_cc_state->cct.ccti_limit = ccti_limit;
+
+ entries = ppd->ccti_entries;
+ ppd->total_cct_entry = ccti_limit + 1;
+
+ for (j = 0, i = sentry; i < eentry; j++, i++)
+ entries[i].entry = be16_to_cpu(p->ccti_entries[j].entry);
+
+ memcpy(new_cc_state->cct.entries, entries,
+ eentry * sizeof(struct ib_cc_table_entry));
+
+ new_cc_state->cong_setting.port_control = IB_CC_CCS_PC_SL_BASED;
+ new_cc_state->cong_setting.control_map = ppd->cc_sl_control_map;
+ memcpy(new_cc_state->cong_setting.entries, ppd->congestion_entries,
+ OPA_MAX_SLS * sizeof(struct opa_congestion_setting_entry));
+
+ rcu_assign_pointer(ppd->cc_state, new_cc_state);
+
+ spin_unlock(&ppd->cc_state_lock);
+
+ call_rcu(&old_cc_state->rcu, cc_state_reclaim);
+
+getit:
+ return __subn_get_opa_cc_table(smp, am, data, ibdev, port, resp_len);
+}
+
+struct opa_led_info {
+ __be32 rsvd_led_mask;
+ __be32 rsvd;
+};
+
+#define OPA_LED_SHIFT 31
+#define OPA_LED_MASK (1 << OPA_LED_SHIFT)
+
+static int __subn_get_opa_led_info(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct opa_led_info *p = (struct opa_led_info *) data;
+ u32 nport = OPA_AM_NPORT(am);
+ u64 reg;
+
+ if (nport != 1 || OPA_AM_PORTNUM(am)) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ reg = read_csr(dd, DCC_CFG_LED_CNTRL);
+ if ((reg & DCC_CFG_LED_CNTRL_LED_CNTRL_SMASK) &&
+ ((reg & DCC_CFG_LED_CNTRL_LED_SW_BLINK_RATE_SMASK) == 0xf))
+ p->rsvd_led_mask = cpu_to_be32(OPA_LED_MASK);
+
+ if (resp_len)
+ *resp_len += sizeof(struct opa_led_info);
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int __subn_set_opa_led_info(struct opa_smp *smp, u32 am, u8 *data,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct opa_led_info *p = (struct opa_led_info *) data;
+ u32 nport = OPA_AM_NPORT(am);
+ int on = !!(be32_to_cpu(p->rsvd_led_mask) & OPA_LED_MASK);
+
+ if (nport != 1 || OPA_AM_PORTNUM(am)) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ setextled(dd, on);
+
+ return __subn_get_opa_led_info(smp, am, data, ibdev, port, resp_len);
+}
+
+static int subn_get_opa_sma(__be16 attr_id, struct opa_smp *smp, u32 am,
+ u8 *data, struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ int ret;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+
+ switch (attr_id) {
+ case IB_SMP_ATTR_NODE_DESC:
+ ret = __subn_get_opa_nodedesc(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case IB_SMP_ATTR_NODE_INFO:
+ ret = __subn_get_opa_nodeinfo(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case IB_SMP_ATTR_PORT_INFO:
+ ret = __subn_get_opa_portinfo(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case IB_SMP_ATTR_PKEY_TABLE:
+ ret = __subn_get_opa_pkeytable(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_SL_TO_SC_MAP:
+ ret = __subn_get_opa_sl_to_sc(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_SC_TO_SL_MAP:
+ ret = __subn_get_opa_sc_to_sl(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_SC_TO_VLT_MAP:
+ ret = __subn_get_opa_sc_to_vlt(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_SC_TO_VLNT_MAP:
+ ret = __subn_get_opa_sc_to_vlnt(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_PORT_STATE_INFO:
+ ret = __subn_get_opa_psi(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_BUFFER_CONTROL_TABLE:
+ ret = __subn_get_opa_bct(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_CABLE_INFO:
+ ret = __subn_get_opa_cable_info(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case IB_SMP_ATTR_VL_ARB_TABLE:
+ ret = __subn_get_opa_vl_arb(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_CONGESTION_INFO:
+ ret = __subn_get_opa_cong_info(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_HFI_CONGESTION_SETTING:
+ ret = __subn_get_opa_cong_setting(smp, am, data, ibdev,
+ port, resp_len);
+ break;
+ case OPA_ATTRIB_ID_HFI_CONGESTION_LOG:
+ ret = __subn_get_opa_hfi1_cong_log(smp, am, data, ibdev,
+ port, resp_len);
+ break;
+ case OPA_ATTRIB_ID_CONGESTION_CONTROL_TABLE:
+ ret = __subn_get_opa_cc_table(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case IB_SMP_ATTR_LED_INFO:
+ ret = __subn_get_opa_led_info(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case IB_SMP_ATTR_SM_INFO:
+ if (ibp->port_cap_flags & IB_PORT_SM_DISABLED)
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
+ if (ibp->port_cap_flags & IB_PORT_SM)
+ return IB_MAD_RESULT_SUCCESS;
+ /* FALLTHROUGH */
+ default:
+ smp->status |= IB_SMP_UNSUP_METH_ATTR;
+ ret = reply((struct ib_mad_hdr *)smp);
+ break;
+ }
+ return ret;
+}
+
+static int subn_set_opa_sma(__be16 attr_id, struct opa_smp *smp, u32 am,
+ u8 *data, struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ int ret;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+
+ switch (attr_id) {
+ case IB_SMP_ATTR_PORT_INFO:
+ ret = __subn_set_opa_portinfo(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case IB_SMP_ATTR_PKEY_TABLE:
+ ret = __subn_set_opa_pkeytable(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_SL_TO_SC_MAP:
+ ret = __subn_set_opa_sl_to_sc(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_SC_TO_SL_MAP:
+ ret = __subn_set_opa_sc_to_sl(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_SC_TO_VLT_MAP:
+ ret = __subn_set_opa_sc_to_vlt(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_SC_TO_VLNT_MAP:
+ ret = __subn_set_opa_sc_to_vlnt(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_PORT_STATE_INFO:
+ ret = __subn_set_opa_psi(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_BUFFER_CONTROL_TABLE:
+ ret = __subn_set_opa_bct(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case IB_SMP_ATTR_VL_ARB_TABLE:
+ ret = __subn_set_opa_vl_arb(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case OPA_ATTRIB_ID_HFI_CONGESTION_SETTING:
+ ret = __subn_set_opa_cong_setting(smp, am, data, ibdev,
+ port, resp_len);
+ break;
+ case OPA_ATTRIB_ID_CONGESTION_CONTROL_TABLE:
+ ret = __subn_set_opa_cc_table(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case IB_SMP_ATTR_LED_INFO:
+ ret = __subn_set_opa_led_info(smp, am, data, ibdev, port,
+ resp_len);
+ break;
+ case IB_SMP_ATTR_SM_INFO:
+ if (ibp->port_cap_flags & IB_PORT_SM_DISABLED)
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
+ if (ibp->port_cap_flags & IB_PORT_SM)
+ return IB_MAD_RESULT_SUCCESS;
+ /* FALLTHROUGH */
+ default:
+ smp->status |= IB_SMP_UNSUP_METH_ATTR;
+ ret = reply((struct ib_mad_hdr *)smp);
+ break;
+ }
+ return ret;
+}
+
+static inline void set_aggr_error(struct opa_aggregate *ag)
+{
+ ag->err_reqlength |= cpu_to_be16(0x8000);
+}
+
+static int subn_get_opa_aggregate(struct opa_smp *smp,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ int i;
+ u32 num_attr = be32_to_cpu(smp->attr_mod) & 0x000000ff;
+ u8 *next_smp = opa_get_smp_data(smp);
+
+ if (num_attr < 1 || num_attr > 117) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ for (i = 0; i < num_attr; i++) {
+ struct opa_aggregate *agg;
+ size_t agg_data_len;
+ size_t agg_size;
+ u32 am;
+
+ agg = (struct opa_aggregate *)next_smp;
+ agg_data_len = (be16_to_cpu(agg->err_reqlength) & 0x007f) * 8;
+ agg_size = sizeof(*agg) + agg_data_len;
+ am = be32_to_cpu(agg->attr_mod);
+
+ *resp_len += agg_size;
+
+ if (next_smp + agg_size > ((u8 *)smp) + sizeof(*smp)) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ /* zero the payload for this segment */
+ memset(next_smp + sizeof(*agg), 0, agg_data_len);
+
+ (void) subn_get_opa_sma(agg->attr_id, smp, am, agg->data,
+ ibdev, port, NULL);
+ if (smp->status & ~IB_SMP_DIRECTION) {
+ set_aggr_error(agg);
+ return reply((struct ib_mad_hdr *)smp);
+ }
+ next_smp += agg_size;
+
+ }
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+static int subn_set_opa_aggregate(struct opa_smp *smp,
+ struct ib_device *ibdev, u8 port,
+ u32 *resp_len)
+{
+ int i;
+ u32 num_attr = be32_to_cpu(smp->attr_mod) & 0x000000ff;
+ u8 *next_smp = opa_get_smp_data(smp);
+
+ if (num_attr < 1 || num_attr > 117) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ for (i = 0; i < num_attr; i++) {
+ struct opa_aggregate *agg;
+ size_t agg_data_len;
+ size_t agg_size;
+ u32 am;
+
+ agg = (struct opa_aggregate *)next_smp;
+ agg_data_len = (be16_to_cpu(agg->err_reqlength) & 0x007f) * 8;
+ agg_size = sizeof(*agg) + agg_data_len;
+ am = be32_to_cpu(agg->attr_mod);
+
+ *resp_len += agg_size;
+
+ if (next_smp + agg_size > ((u8 *)smp) + sizeof(*smp)) {
+ smp->status |= IB_SMP_INVALID_FIELD;
+ return reply((struct ib_mad_hdr *)smp);
+ }
+
+ (void) subn_set_opa_sma(agg->attr_id, smp, am, agg->data,
+ ibdev, port, NULL);
+ if (smp->status & ~IB_SMP_DIRECTION) {
+ set_aggr_error(agg);
+ return reply((struct ib_mad_hdr *)smp);
+ }
+ next_smp += agg_size;
+
+ }
+
+ return reply((struct ib_mad_hdr *)smp);
+}
+
+/*
+ * OPAv1 specifies that, on the transition to link up, these counters
+ * are cleared:
+ * PortRcvErrors [*]
+ * LinkErrorRecovery
+ * LocalLinkIntegrityErrors
+ * ExcessiveBufferOverruns [*]
+ *
+ * [*] Error info associated with these counters is retained, but the
+ * error info status is reset to 0.
+ */
+void clear_linkup_counters(struct hfi1_devdata *dd)
+{
+ /* PortRcvErrors */
+ write_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL, 0);
+ dd->err_info_rcvport.status_and_code &= ~OPA_EI_STATUS_SMASK;
+ /* LinkErrorRecovery */
+ write_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL, 0);
+ write_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT, CNTR_INVALID_VL, 0);
+ /* LocalLinkIntegrityErrors */
+ write_dev_cntr(dd, C_DC_TX_REPLAY, CNTR_INVALID_VL, 0);
+ write_dev_cntr(dd, C_DC_RX_REPLAY, CNTR_INVALID_VL, 0);
+ /* ExcessiveBufferOverruns */
+ write_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL, 0);
+ dd->rcv_ovfl_cnt = 0;
+ dd->err_info_xmit_constraint.status &= ~OPA_EI_STATUS_SMASK;
+}
+
+/*
+ * is_local_mad() returns 1 if 'mad' is sent from, and destined to the
+ * local node, 0 otherwise.
+ */
+static int is_local_mad(struct hfi1_ibport *ibp, const struct opa_mad *mad,
+ const struct ib_wc *in_wc)
+{
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ const struct opa_smp *smp = (const struct opa_smp *)mad;
+
+ if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
+ return (smp->hop_cnt == 0 &&
+ smp->route.dr.dr_slid == OPA_LID_PERMISSIVE &&
+ smp->route.dr.dr_dlid == OPA_LID_PERMISSIVE);
+ }
+
+ return (in_wc->slid == ppd->lid);
+}
+
+/*
+ * opa_local_smp_check() should only be called on MADs for which
+ * is_local_mad() returns true. It applies the SMP checks that are
+ * specific to SMPs which are sent from, and destined to this node.
+ * opa_local_smp_check() returns 0 if the SMP passes its checks, 1
+ * otherwise.
+ *
+ * SMPs which arrive from other nodes are instead checked by
+ * opa_smp_check().
+ */
+static int opa_local_smp_check(struct hfi1_ibport *ibp,
+ const struct ib_wc *in_wc)
+{
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u16 slid = in_wc->slid;
+ u16 pkey;
+
+ if (in_wc->pkey_index >= ARRAY_SIZE(ppd->pkeys))
+ return 1;
+
+ pkey = ppd->pkeys[in_wc->pkey_index];
+ /*
+ * We need to do the "node-local" checks specified in OPAv1,
+ * rev 0.90, section 9.10.26, which are:
+ * - pkey is 0x7fff, or 0xffff
+ * - Source QPN == 0 || Destination QPN == 0
+ * - the MAD header's management class is either
+ * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE or
+ * IB_MGMT_CLASS_SUBN_LID_ROUTED
+ * - SLID != 0
+ *
+ * However, we know (and so don't need to check again) that,
+ * for local SMPs, the MAD stack passes MADs with:
+ * - Source QPN of 0
+ * - MAD mgmt_class is IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
+ * - SLID is either: OPA_LID_PERMISSIVE (0xFFFFFFFF), or
+ * our own port's lid
+ *
+ */
+ if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY)
+ return 0;
+ ingress_pkey_table_fail(ppd, pkey, slid);
+ return 1;
+}
+
+static int process_subn_opa(struct ib_device *ibdev, int mad_flags,
+ u8 port, const struct opa_mad *in_mad,
+ struct opa_mad *out_mad,
+ u32 *resp_len)
+{
+ struct opa_smp *smp = (struct opa_smp *)out_mad;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ u8 *data;
+ u32 am;
+ __be16 attr_id;
+ int ret;
+
+ *out_mad = *in_mad;
+ data = opa_get_smp_data(smp);
+
+ am = be32_to_cpu(smp->attr_mod);
+ attr_id = smp->attr_id;
+ if (smp->class_version != OPA_SMI_CLASS_VERSION) {
+ smp->status |= IB_SMP_UNSUP_VERSION;
+ ret = reply((struct ib_mad_hdr *)smp);
+ goto bail;
+ }
+ ret = check_mkey(ibp, (struct ib_mad_hdr *)smp, mad_flags, smp->mkey,
+ smp->route.dr.dr_slid, smp->route.dr.return_path,
+ smp->hop_cnt);
+ if (ret) {
+ u32 port_num = be32_to_cpu(smp->attr_mod);
+
+ /*
+ * If this is a get/set portinfo, we already check the
+ * M_Key if the MAD is for another port and the M_Key
+ * is OK on the receiving port. This check is needed
+ * to increment the error counters when the M_Key
+ * fails to match on *both* ports.
+ */
+ if (attr_id == IB_SMP_ATTR_PORT_INFO &&
+ (smp->method == IB_MGMT_METHOD_GET ||
+ smp->method == IB_MGMT_METHOD_SET) &&
+ port_num && port_num <= ibdev->phys_port_cnt &&
+ port != port_num)
+ (void) check_mkey(to_iport(ibdev, port_num),
+ (struct ib_mad_hdr *)smp, 0,
+ smp->mkey, smp->route.dr.dr_slid,
+ smp->route.dr.return_path,
+ smp->hop_cnt);
+ ret = IB_MAD_RESULT_FAILURE;
+ goto bail;
+ }
+
+ *resp_len = opa_get_smp_header_size(smp);
+
+ switch (smp->method) {
+ case IB_MGMT_METHOD_GET:
+ switch (attr_id) {
+ default:
+ clear_opa_smp_data(smp);
+ ret = subn_get_opa_sma(attr_id, smp, am, data,
+ ibdev, port, resp_len);
+ goto bail;
+ case OPA_ATTRIB_ID_AGGREGATE:
+ ret = subn_get_opa_aggregate(smp, ibdev, port,
+ resp_len);
+ goto bail;
+ }
+ case IB_MGMT_METHOD_SET:
+ switch (attr_id) {
+ default:
+ ret = subn_set_opa_sma(attr_id, smp, am, data,
+ ibdev, port, resp_len);
+ goto bail;
+ case OPA_ATTRIB_ID_AGGREGATE:
+ ret = subn_set_opa_aggregate(smp, ibdev, port,
+ resp_len);
+ goto bail;
+ }
+ case IB_MGMT_METHOD_TRAP:
+ case IB_MGMT_METHOD_REPORT:
+ case IB_MGMT_METHOD_REPORT_RESP:
+ case IB_MGMT_METHOD_GET_RESP:
+ /*
+ * The ib_mad module will call us to process responses
+ * before checking for other consumers.
+ * Just tell the caller to process it normally.
+ */
+ ret = IB_MAD_RESULT_SUCCESS;
+ goto bail;
+ default:
+ smp->status |= IB_SMP_UNSUP_METHOD;
+ ret = reply((struct ib_mad_hdr *)smp);
+ }
+
+bail:
+ return ret;
+}
+
+static int process_subn(struct ib_device *ibdev, int mad_flags,
+ u8 port, const struct ib_mad *in_mad,
+ struct ib_mad *out_mad)
+{
+ struct ib_smp *smp = (struct ib_smp *)out_mad;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ int ret;
+
+ *out_mad = *in_mad;
+ if (smp->class_version != 1) {
+ smp->status |= IB_SMP_UNSUP_VERSION;
+ ret = reply((struct ib_mad_hdr *)smp);
+ goto bail;
+ }
+
+ ret = check_mkey(ibp, (struct ib_mad_hdr *)smp, mad_flags,
+ smp->mkey, (__force __be32)smp->dr_slid,
+ smp->return_path, smp->hop_cnt);
+ if (ret) {
+ u32 port_num = be32_to_cpu(smp->attr_mod);
+
+ /*
+ * If this is a get/set portinfo, we already check the
+ * M_Key if the MAD is for another port and the M_Key
+ * is OK on the receiving port. This check is needed
+ * to increment the error counters when the M_Key
+ * fails to match on *both* ports.
+ */
+ if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
+ (smp->method == IB_MGMT_METHOD_GET ||
+ smp->method == IB_MGMT_METHOD_SET) &&
+ port_num && port_num <= ibdev->phys_port_cnt &&
+ port != port_num)
+ (void) check_mkey(to_iport(ibdev, port_num),
+ (struct ib_mad_hdr *)smp, 0,
+ smp->mkey,
+ (__force __be32)smp->dr_slid,
+ smp->return_path, smp->hop_cnt);
+ ret = IB_MAD_RESULT_FAILURE;
+ goto bail;
+ }
+
+ switch (smp->method) {
+ case IB_MGMT_METHOD_GET:
+ switch (smp->attr_id) {
+ case IB_SMP_ATTR_NODE_INFO:
+ ret = subn_get_nodeinfo(smp, ibdev, port);
+ goto bail;
+ default:
+ smp->status |= IB_SMP_UNSUP_METH_ATTR;
+ ret = reply((struct ib_mad_hdr *)smp);
+ goto bail;
+ }
+ }
+
+bail:
+ return ret;
+}
+
+static int process_perf_opa(struct ib_device *ibdev, u8 port,
+ const struct opa_mad *in_mad,
+ struct opa_mad *out_mad, u32 *resp_len)
+{
+ struct opa_pma_mad *pmp = (struct opa_pma_mad *)out_mad;
+ int ret;
+
+ *out_mad = *in_mad;
+
+ if (pmp->mad_hdr.class_version != OPA_SMI_CLASS_VERSION) {
+ pmp->mad_hdr.status |= IB_SMP_UNSUP_VERSION;
+ return reply((struct ib_mad_hdr *)pmp);
+ }
+
+ *resp_len = sizeof(pmp->mad_hdr);
+
+ switch (pmp->mad_hdr.method) {
+ case IB_MGMT_METHOD_GET:
+ switch (pmp->mad_hdr.attr_id) {
+ case IB_PMA_CLASS_PORT_INFO:
+ ret = pma_get_opa_classportinfo(pmp, ibdev, resp_len);
+ goto bail;
+ case OPA_PM_ATTRIB_ID_PORT_STATUS:
+ ret = pma_get_opa_portstatus(pmp, ibdev, port,
+ resp_len);
+ goto bail;
+ case OPA_PM_ATTRIB_ID_DATA_PORT_COUNTERS:
+ ret = pma_get_opa_datacounters(pmp, ibdev, port,
+ resp_len);
+ goto bail;
+ case OPA_PM_ATTRIB_ID_ERROR_PORT_COUNTERS:
+ ret = pma_get_opa_porterrors(pmp, ibdev, port,
+ resp_len);
+ goto bail;
+ case OPA_PM_ATTRIB_ID_ERROR_INFO:
+ ret = pma_get_opa_errorinfo(pmp, ibdev, port,
+ resp_len);
+ goto bail;
+ default:
+ pmp->mad_hdr.status |= IB_SMP_UNSUP_METH_ATTR;
+ ret = reply((struct ib_mad_hdr *)pmp);
+ goto bail;
+ }
+
+ case IB_MGMT_METHOD_SET:
+ switch (pmp->mad_hdr.attr_id) {
+ case OPA_PM_ATTRIB_ID_CLEAR_PORT_STATUS:
+ ret = pma_set_opa_portstatus(pmp, ibdev, port,
+ resp_len);
+ goto bail;
+ case OPA_PM_ATTRIB_ID_ERROR_INFO:
+ ret = pma_set_opa_errorinfo(pmp, ibdev, port,
+ resp_len);
+ goto bail;
+ default:
+ pmp->mad_hdr.status |= IB_SMP_UNSUP_METH_ATTR;
+ ret = reply((struct ib_mad_hdr *)pmp);
+ goto bail;
+ }
+
+ case IB_MGMT_METHOD_TRAP:
+ case IB_MGMT_METHOD_GET_RESP:
+ /*
+ * The ib_mad module will call us to process responses
+ * before checking for other consumers.
+ * Just tell the caller to process it normally.
+ */
+ ret = IB_MAD_RESULT_SUCCESS;
+ goto bail;
+
+ default:
+ pmp->mad_hdr.status |= IB_SMP_UNSUP_METHOD;
+ ret = reply((struct ib_mad_hdr *)pmp);
+ }
+
+bail:
+ return ret;
+}
+
+static int hfi1_process_opa_mad(struct ib_device *ibdev, int mad_flags,
+ u8 port, const struct ib_wc *in_wc,
+ const struct ib_grh *in_grh,
+ const struct opa_mad *in_mad,
+ struct opa_mad *out_mad, size_t *out_mad_size,
+ u16 *out_mad_pkey_index)
+{
+ int ret;
+ int pkey_idx;
+ u32 resp_len = 0;
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+
+ pkey_idx = hfi1_lookup_pkey_idx(ibp, LIM_MGMT_P_KEY);
+ if (pkey_idx < 0) {
+ pr_warn("failed to find limited mgmt pkey, defaulting 0x%x\n",
+ hfi1_get_pkey(ibp, 1));
+ pkey_idx = 1;
+ }
+ *out_mad_pkey_index = (u16)pkey_idx;
+
+ switch (in_mad->mad_hdr.mgmt_class) {
+ case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
+ case IB_MGMT_CLASS_SUBN_LID_ROUTED:
+ if (is_local_mad(ibp, in_mad, in_wc)) {
+ ret = opa_local_smp_check(ibp, in_wc);
+ if (ret)
+ return IB_MAD_RESULT_FAILURE;
+ }
+ ret = process_subn_opa(ibdev, mad_flags, port, in_mad,
+ out_mad, &resp_len);
+ goto bail;
+ case IB_MGMT_CLASS_PERF_MGMT:
+ ret = process_perf_opa(ibdev, port, in_mad, out_mad,
+ &resp_len);
+ goto bail;
+
+ default:
+ ret = IB_MAD_RESULT_SUCCESS;
+ }
+
+bail:
+ if (ret & IB_MAD_RESULT_REPLY)
+ *out_mad_size = round_up(resp_len, 8);
+ else if (ret & IB_MAD_RESULT_SUCCESS)
+ *out_mad_size = in_wc->byte_len - sizeof(struct ib_grh);
+
+ return ret;
+}
+
+static int hfi1_process_ib_mad(struct ib_device *ibdev, int mad_flags, u8 port,
+ const struct ib_wc *in_wc,
+ const struct ib_grh *in_grh,
+ const struct ib_mad *in_mad,
+ struct ib_mad *out_mad)
+{
+ int ret;
+
+ switch (in_mad->mad_hdr.mgmt_class) {
+ case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
+ case IB_MGMT_CLASS_SUBN_LID_ROUTED:
+ ret = process_subn(ibdev, mad_flags, port, in_mad, out_mad);
+ goto bail;
+ default:
+ ret = IB_MAD_RESULT_SUCCESS;
+ }
+
+bail:
+ return ret;
+}
+
+/**
+ * hfi1_process_mad - process an incoming MAD packet
+ * @ibdev: the infiniband device this packet came in on
+ * @mad_flags: MAD flags
+ * @port: the port number this packet came in on
+ * @in_wc: the work completion entry for this packet
+ * @in_grh: the global route header for this packet
+ * @in_mad: the incoming MAD
+ * @out_mad: any outgoing MAD reply
+ *
+ * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
+ * interested in processing.
+ *
+ * Note that the verbs framework has already done the MAD sanity checks,
+ * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
+ * MADs.
+ *
+ * This is called by the ib_mad module.
+ */
+int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
+ const struct ib_wc *in_wc, const struct ib_grh *in_grh,
+ const struct ib_mad_hdr *in_mad, size_t in_mad_size,
+ struct ib_mad_hdr *out_mad, size_t *out_mad_size,
+ u16 *out_mad_pkey_index)
+{
+ switch (in_mad->base_version) {
+ case OPA_MGMT_BASE_VERSION:
+ if (unlikely(in_mad_size != sizeof(struct opa_mad))) {
+ dev_err(ibdev->dma_device, "invalid in_mad_size\n");
+ return IB_MAD_RESULT_FAILURE;
+ }
+ return hfi1_process_opa_mad(ibdev, mad_flags, port,
+ in_wc, in_grh,
+ (struct opa_mad *)in_mad,
+ (struct opa_mad *)out_mad,
+ out_mad_size,
+ out_mad_pkey_index);
+ case IB_MGMT_BASE_VERSION:
+ return hfi1_process_ib_mad(ibdev, mad_flags, port,
+ in_wc, in_grh,
+ (const struct ib_mad *)in_mad,
+ (struct ib_mad *)out_mad);
+ default:
+ break;
+ }
+
+ return IB_MAD_RESULT_FAILURE;
+}
+
+static void send_handler(struct ib_mad_agent *agent,
+ struct ib_mad_send_wc *mad_send_wc)
+{
+ ib_free_send_mad(mad_send_wc->send_buf);
+}
+
+int hfi1_create_agents(struct hfi1_ibdev *dev)
+{
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+ struct ib_mad_agent *agent;
+ struct hfi1_ibport *ibp;
+ int p;
+ int ret;
+
+ for (p = 0; p < dd->num_pports; p++) {
+ ibp = &dd->pport[p].ibport_data;
+ agent = ib_register_mad_agent(&dev->ibdev, p + 1, IB_QPT_SMI,
+ NULL, 0, send_handler,
+ NULL, NULL, 0);
+ if (IS_ERR(agent)) {
+ ret = PTR_ERR(agent);
+ goto err;
+ }
+
+ ibp->send_agent = agent;
+ }
+
+ return 0;
+
+err:
+ for (p = 0; p < dd->num_pports; p++) {
+ ibp = &dd->pport[p].ibport_data;
+ if (ibp->send_agent) {
+ agent = ibp->send_agent;
+ ibp->send_agent = NULL;
+ ib_unregister_mad_agent(agent);
+ }
+ }
+
+ return ret;
+}
+
+void hfi1_free_agents(struct hfi1_ibdev *dev)
+{
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+ struct ib_mad_agent *agent;
+ struct hfi1_ibport *ibp;
+ int p;
+
+ for (p = 0; p < dd->num_pports; p++) {
+ ibp = &dd->pport[p].ibport_data;
+ if (ibp->send_agent) {
+ agent = ibp->send_agent;
+ ibp->send_agent = NULL;
+ ib_unregister_mad_agent(agent);
+ }
+ if (ibp->sm_ah) {
+ ib_destroy_ah(&ibp->sm_ah->ibah);
+ ibp->sm_ah = NULL;
+ }
+ }
+}
diff --git a/drivers/staging/rdma/hfi1/mad.h b/drivers/staging/rdma/hfi1/mad.h
new file mode 100644
index 0000000..4745750
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/mad.h
@@ -0,0 +1,325 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef _HFI1_MAD_H
+#define _HFI1_MAD_H
+
+#include <rdma/ib_pma.h>
+#define USE_PI_LED_ENABLE 1 /* use led enabled bit in struct
+ * opa_port_states, if available */
+#include <rdma/opa_smi.h>
+#include <rdma/opa_port_info.h>
+#ifndef PI_LED_ENABLE_SUP
+#define PI_LED_ENABLE_SUP 0
+#endif
+#include "opa_compat.h"
+
+
+
+#define IB_VLARB_LOWPRI_0_31 1
+#define IB_VLARB_LOWPRI_32_63 2
+#define IB_VLARB_HIGHPRI_0_31 3
+#define IB_VLARB_HIGHPRI_32_63 4
+
+#define OPA_MAX_PREEMPT_CAP 32
+#define OPA_VLARB_LOW_ELEMENTS 0
+#define OPA_VLARB_HIGH_ELEMENTS 1
+#define OPA_VLARB_PREEMPT_ELEMENTS 2
+#define OPA_VLARB_PREEMPT_MATRIX 3
+
+#define IB_PMA_PORT_COUNTERS_CONG cpu_to_be16(0xFF00)
+
+struct ib_pma_portcounters_cong {
+ u8 reserved;
+ u8 reserved1;
+ __be16 port_check_rate;
+ __be16 symbol_error_counter;
+ u8 link_error_recovery_counter;
+ u8 link_downed_counter;
+ __be16 port_rcv_errors;
+ __be16 port_rcv_remphys_errors;
+ __be16 port_rcv_switch_relay_errors;
+ __be16 port_xmit_discards;
+ u8 port_xmit_constraint_errors;
+ u8 port_rcv_constraint_errors;
+ u8 reserved2;
+ u8 link_overrun_errors; /* LocalLink: 7:4, BufferOverrun: 3:0 */
+ __be16 reserved3;
+ __be16 vl15_dropped;
+ __be64 port_xmit_data;
+ __be64 port_rcv_data;
+ __be64 port_xmit_packets;
+ __be64 port_rcv_packets;
+ __be64 port_xmit_wait;
+ __be64 port_adr_events;
+} __packed;
+
+#define IB_SMP_UNSUP_VERSION cpu_to_be16(0x0004)
+#define IB_SMP_UNSUP_METHOD cpu_to_be16(0x0008)
+#define IB_SMP_UNSUP_METH_ATTR cpu_to_be16(0x000C)
+#define IB_SMP_INVALID_FIELD cpu_to_be16(0x001C)
+
+#define OPA_MAX_PREEMPT_CAP 32
+#define OPA_VLARB_LOW_ELEMENTS 0
+#define OPA_VLARB_HIGH_ELEMENTS 1
+#define OPA_VLARB_PREEMPT_ELEMENTS 2
+#define OPA_VLARB_PREEMPT_MATRIX 3
+
+#define HFI1_XMIT_RATE_UNSUPPORTED 0x0
+#define HFI1_XMIT_RATE_PICO 0x7
+/* number of 4nsec cycles equaling 2secs */
+#define HFI1_CONG_TIMER_PSINTERVAL 0x1DCD64EC
+
+#define IB_CC_SVCTYPE_RC 0x0
+#define IB_CC_SVCTYPE_UC 0x1
+#define IB_CC_SVCTYPE_RD 0x2
+#define IB_CC_SVCTYPE_UD 0x3
+
+
+/*
+ * There should be an equivalent IB #define for the following, but
+ * I cannot find it.
+ */
+#define OPA_CC_LOG_TYPE_HFI 2
+
+struct opa_hfi1_cong_log_event_internal {
+ u32 lqpn;
+ u32 rqpn;
+ u8 sl;
+ u8 svc_type;
+ u32 rlid;
+ s64 timestamp; /* wider than 32 bits to detect 32 bit rollover */
+};
+
+struct opa_hfi1_cong_log_event {
+ u8 local_qp_cn_entry[3];
+ u8 remote_qp_number_cn_entry[3];
+ u8 sl_svc_type_cn_entry; /* 5 bits SL, 3 bits svc type */
+ u8 reserved;
+ __be32 remote_lid_cn_entry;
+ __be32 timestamp_cn_entry;
+} __packed;
+
+#define OPA_CONG_LOG_ELEMS 96
+
+struct opa_hfi1_cong_log {
+ u8 log_type;
+ u8 congestion_flags;
+ __be16 threshold_event_counter;
+ __be32 current_time_stamp;
+ u8 threshold_cong_event_map[OPA_MAX_SLS/8];
+ struct opa_hfi1_cong_log_event events[OPA_CONG_LOG_ELEMS];
+} __packed;
+
+#define IB_CC_TABLE_CAP_DEFAULT 31
+
+/* Port control flags */
+#define IB_CC_CCS_PC_SL_BASED 0x01
+
+struct opa_congestion_setting_entry {
+ u8 ccti_increase;
+ u8 reserved;
+ __be16 ccti_timer;
+ u8 trigger_threshold;
+ u8 ccti_min; /* min CCTI for cc table */
+} __packed;
+
+struct opa_congestion_setting_entry_shadow {
+ u8 ccti_increase;
+ u8 reserved;
+ u16 ccti_timer;
+ u8 trigger_threshold;
+ u8 ccti_min; /* min CCTI for cc table */
+} __packed;
+
+struct opa_congestion_setting_attr {
+ __be32 control_map;
+ __be16 port_control;
+ struct opa_congestion_setting_entry entries[OPA_MAX_SLS];
+} __packed;
+
+struct opa_congestion_setting_attr_shadow {
+ u32 control_map;
+ u16 port_control;
+ struct opa_congestion_setting_entry_shadow entries[OPA_MAX_SLS];
+} __packed;
+
+#define IB_CC_TABLE_ENTRY_INCREASE_DEFAULT 1
+#define IB_CC_TABLE_ENTRY_TIMER_DEFAULT 1
+
+/* 64 Congestion Control table entries in a single MAD */
+#define IB_CCT_ENTRIES 64
+#define IB_CCT_MIN_ENTRIES (IB_CCT_ENTRIES * 2)
+
+struct ib_cc_table_entry {
+ __be16 entry; /* shift:2, multiplier:14 */
+};
+
+struct ib_cc_table_entry_shadow {
+ u16 entry; /* shift:2, multiplier:14 */
+};
+
+struct ib_cc_table_attr {
+ __be16 ccti_limit; /* max CCTI for cc table */
+ struct ib_cc_table_entry ccti_entries[IB_CCT_ENTRIES];
+} __packed;
+
+struct ib_cc_table_attr_shadow {
+ u16 ccti_limit; /* max CCTI for cc table */
+ struct ib_cc_table_entry_shadow ccti_entries[IB_CCT_ENTRIES];
+} __packed;
+
+#define CC_TABLE_SHADOW_MAX \
+ (IB_CC_TABLE_CAP_DEFAULT * IB_CCT_ENTRIES)
+
+struct cc_table_shadow {
+ u16 ccti_limit; /* max CCTI for cc table */
+ struct ib_cc_table_entry_shadow entries[CC_TABLE_SHADOW_MAX];
+} __packed;
+
+/*
+ * struct cc_state combines the (active) per-port congestion control
+ * table, and the (active) per-SL congestion settings. cc_state data
+ * may need to be read in code paths that we want to be fast, so it
+ * is an RCU protected structure.
+ */
+struct cc_state {
+ struct rcu_head rcu;
+ struct cc_table_shadow cct;
+ struct opa_congestion_setting_attr_shadow cong_setting;
+};
+
+/*
+ * OPA BufferControl MAD
+ */
+
+/* attribute modifier macros */
+#define OPA_AM_NPORT_SHIFT 24
+#define OPA_AM_NPORT_MASK 0xff
+#define OPA_AM_NPORT_SMASK (OPA_AM_NPORT_MASK << OPA_AM_NPORT_SHIFT)
+#define OPA_AM_NPORT(am) (((am) >> OPA_AM_NPORT_SHIFT) & \
+ OPA_AM_NPORT_MASK)
+
+#define OPA_AM_NBLK_SHIFT 24
+#define OPA_AM_NBLK_MASK 0xff
+#define OPA_AM_NBLK_SMASK (OPA_AM_NBLK_MASK << OPA_AM_NBLK_SHIFT)
+#define OPA_AM_NBLK(am) (((am) >> OPA_AM_NBLK_SHIFT) & \
+ OPA_AM_NBLK_MASK)
+
+#define OPA_AM_START_BLK_SHIFT 0
+#define OPA_AM_START_BLK_MASK 0xff
+#define OPA_AM_START_BLK_SMASK (OPA_AM_START_BLK_MASK << \
+ OPA_AM_START_BLK_SHIFT)
+#define OPA_AM_START_BLK(am) (((am) >> OPA_AM_START_BLK_SHIFT) & \
+ OPA_AM_START_BLK_MASK)
+
+#define OPA_AM_PORTNUM_SHIFT 0
+#define OPA_AM_PORTNUM_MASK 0xff
+#define OPA_AM_PORTNUM_SMASK (OPA_AM_PORTNUM_MASK << OPA_AM_PORTNUM_SHIFT)
+#define OPA_AM_PORTNUM(am) (((am) >> OPA_AM_PORTNUM_SHIFT) & \
+ OPA_AM_PORTNUM_MASK)
+
+#define OPA_AM_ASYNC_SHIFT 12
+#define OPA_AM_ASYNC_MASK 0x1
+#define OPA_AM_ASYNC_SMASK (OPA_AM_ASYNC_MASK << OPA_AM_ASYNC_SHIFT)
+#define OPA_AM_ASYNC(am) (((am) >> OPA_AM_ASYNC_SHIFT) & \
+ OPA_AM_ASYNC_MASK)
+
+#define OPA_AM_START_SM_CFG_SHIFT 9
+#define OPA_AM_START_SM_CFG_MASK 0x1
+#define OPA_AM_START_SM_CFG_SMASK (OPA_AM_START_SM_CFG_MASK << \
+ OPA_AM_START_SM_CFG_SHIFT)
+#define OPA_AM_START_SM_CFG(am) (((am) >> OPA_AM_START_SM_CFG_SHIFT) \
+ & OPA_AM_START_SM_CFG_MASK)
+
+#define OPA_AM_CI_ADDR_SHIFT 19
+#define OPA_AM_CI_ADDR_MASK 0xfff
+#define OPA_AM_CI_ADDR_SMASK (OPA_AM_CI_ADDR_MASK << OPA_CI_ADDR_SHIFT)
+#define OPA_AM_CI_ADDR(am) (((am) >> OPA_AM_CI_ADDR_SHIFT) & \
+ OPA_AM_CI_ADDR_MASK)
+
+#define OPA_AM_CI_LEN_SHIFT 13
+#define OPA_AM_CI_LEN_MASK 0x3f
+#define OPA_AM_CI_LEN_SMASK (OPA_AM_CI_LEN_MASK << OPA_CI_LEN_SHIFT)
+#define OPA_AM_CI_LEN(am) (((am) >> OPA_AM_CI_LEN_SHIFT) & \
+ OPA_AM_CI_LEN_MASK)
+
+/* error info macros */
+#define OPA_EI_STATUS_SMASK 0x80
+#define OPA_EI_CODE_SMASK 0x0f
+
+struct vl_limit {
+ __be16 dedicated;
+ __be16 shared;
+};
+
+struct buffer_control {
+ __be16 reserved;
+ __be16 overall_shared_limit;
+ struct vl_limit vl[OPA_MAX_VLS];
+};
+
+struct sc2vlnt {
+ u8 vlnt[32]; /* 5 bit VL, 3 bits reserved */
+};
+
+/*
+ * The PortSamplesControl.CounterMasks field is an array of 3 bit fields
+ * which specify the N'th counter's capabilities. See ch. 16.1.3.2.
+ * We support 5 counters which only count the mandatory quantities.
+ */
+#define COUNTER_MASK(q, n) (q << ((9 - n) * 3))
+#define COUNTER_MASK0_9 \
+ cpu_to_be32(COUNTER_MASK(1, 0) | \
+ COUNTER_MASK(1, 1) | \
+ COUNTER_MASK(1, 2) | \
+ COUNTER_MASK(1, 3) | \
+ COUNTER_MASK(1, 4))
+
+#endif /* _HFI1_MAD_H */
diff --git a/drivers/staging/rdma/hfi1/mmap.c b/drivers/staging/rdma/hfi1/mmap.c
new file mode 100644
index 0000000..5173b1c
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/mmap.c
@@ -0,0 +1,192 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <asm/pgtable.h>
+
+#include "verbs.h"
+
+/**
+ * hfi1_release_mmap_info - free mmap info structure
+ * @ref: a pointer to the kref within struct hfi1_mmap_info
+ */
+void hfi1_release_mmap_info(struct kref *ref)
+{
+ struct hfi1_mmap_info *ip =
+ container_of(ref, struct hfi1_mmap_info, ref);
+ struct hfi1_ibdev *dev = to_idev(ip->context->device);
+
+ spin_lock_irq(&dev->pending_lock);
+ list_del(&ip->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+
+ vfree(ip->obj);
+ kfree(ip);
+}
+
+/*
+ * open and close keep track of how many times the CQ is mapped,
+ * to avoid releasing it.
+ */
+static void hfi1_vma_open(struct vm_area_struct *vma)
+{
+ struct hfi1_mmap_info *ip = vma->vm_private_data;
+
+ kref_get(&ip->ref);
+}
+
+static void hfi1_vma_close(struct vm_area_struct *vma)
+{
+ struct hfi1_mmap_info *ip = vma->vm_private_data;
+
+ kref_put(&ip->ref, hfi1_release_mmap_info);
+}
+
+static struct vm_operations_struct hfi1_vm_ops = {
+ .open = hfi1_vma_open,
+ .close = hfi1_vma_close,
+};
+
+/**
+ * hfi1_mmap - create a new mmap region
+ * @context: the IB user context of the process making the mmap() call
+ * @vma: the VMA to be initialized
+ * Return zero if the mmap is OK. Otherwise, return an errno.
+ */
+int hfi1_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
+{
+ struct hfi1_ibdev *dev = to_idev(context->device);
+ unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+ unsigned long size = vma->vm_end - vma->vm_start;
+ struct hfi1_mmap_info *ip, *pp;
+ int ret = -EINVAL;
+
+ /*
+ * Search the device's list of objects waiting for a mmap call.
+ * Normally, this list is very short since a call to create a
+ * CQ, QP, or SRQ is soon followed by a call to mmap().
+ */
+ spin_lock_irq(&dev->pending_lock);
+ list_for_each_entry_safe(ip, pp, &dev->pending_mmaps,
+ pending_mmaps) {
+ /* Only the creator is allowed to mmap the object */
+ if (context != ip->context || (__u64) offset != ip->offset)
+ continue;
+ /* Don't allow a mmap larger than the object. */
+ if (size > ip->size)
+ break;
+
+ list_del_init(&ip->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+
+ ret = remap_vmalloc_range(vma, ip->obj, 0);
+ if (ret)
+ goto done;
+ vma->vm_ops = &hfi1_vm_ops;
+ vma->vm_private_data = ip;
+ hfi1_vma_open(vma);
+ goto done;
+ }
+ spin_unlock_irq(&dev->pending_lock);
+done:
+ return ret;
+}
+
+/*
+ * Allocate information for hfi1_mmap
+ */
+struct hfi1_mmap_info *hfi1_create_mmap_info(struct hfi1_ibdev *dev,
+ u32 size,
+ struct ib_ucontext *context,
+ void *obj) {
+ struct hfi1_mmap_info *ip;
+
+ ip = kmalloc(sizeof(*ip), GFP_KERNEL);
+ if (!ip)
+ goto bail;
+
+ size = PAGE_ALIGN(size);
+
+ spin_lock_irq(&dev->mmap_offset_lock);
+ if (dev->mmap_offset == 0)
+ dev->mmap_offset = PAGE_SIZE;
+ ip->offset = dev->mmap_offset;
+ dev->mmap_offset += size;
+ spin_unlock_irq(&dev->mmap_offset_lock);
+
+ INIT_LIST_HEAD(&ip->pending_mmaps);
+ ip->size = size;
+ ip->context = context;
+ ip->obj = obj;
+ kref_init(&ip->ref);
+
+bail:
+ return ip;
+}
+
+void hfi1_update_mmap_info(struct hfi1_ibdev *dev, struct hfi1_mmap_info *ip,
+ u32 size, void *obj)
+{
+ size = PAGE_ALIGN(size);
+
+ spin_lock_irq(&dev->mmap_offset_lock);
+ if (dev->mmap_offset == 0)
+ dev->mmap_offset = PAGE_SIZE;
+ ip->offset = dev->mmap_offset;
+ dev->mmap_offset += size;
+ spin_unlock_irq(&dev->mmap_offset_lock);
+
+ ip->size = size;
+ ip->obj = obj;
+}
diff --git a/drivers/staging/rdma/hfi1/mr.c b/drivers/staging/rdma/hfi1/mr.c
new file mode 100644
index 0000000..23567f8
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/mr.c
@@ -0,0 +1,546 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <rdma/ib_umem.h>
+#include <rdma/ib_smi.h>
+
+#include "hfi.h"
+
+/* Fast memory region */
+struct hfi1_fmr {
+ struct ib_fmr ibfmr;
+ struct hfi1_mregion mr; /* must be last */
+};
+
+static inline struct hfi1_fmr *to_ifmr(struct ib_fmr *ibfmr)
+{
+ return container_of(ibfmr, struct hfi1_fmr, ibfmr);
+}
+
+static int init_mregion(struct hfi1_mregion *mr, struct ib_pd *pd,
+ int count)
+{
+ int m, i = 0;
+ int rval = 0;
+
+ m = (count + HFI1_SEGSZ - 1) / HFI1_SEGSZ;
+ for (; i < m; i++) {
+ mr->map[i] = kzalloc(sizeof(*mr->map[0]), GFP_KERNEL);
+ if (!mr->map[i])
+ goto bail;
+ }
+ mr->mapsz = m;
+ init_completion(&mr->comp);
+ /* count returning the ptr to user */
+ atomic_set(&mr->refcount, 1);
+ mr->pd = pd;
+ mr->max_segs = count;
+out:
+ return rval;
+bail:
+ while (i)
+ kfree(mr->map[--i]);
+ rval = -ENOMEM;
+ goto out;
+}
+
+static void deinit_mregion(struct hfi1_mregion *mr)
+{
+ int i = mr->mapsz;
+
+ mr->mapsz = 0;
+ while (i)
+ kfree(mr->map[--i]);
+}
+
+
+/**
+ * hfi1_get_dma_mr - get a DMA memory region
+ * @pd: protection domain for this memory region
+ * @acc: access flags
+ *
+ * Returns the memory region on success, otherwise returns an errno.
+ * Note that all DMA addresses should be created via the
+ * struct ib_dma_mapping_ops functions (see dma.c).
+ */
+struct ib_mr *hfi1_get_dma_mr(struct ib_pd *pd, int acc)
+{
+ struct hfi1_mr *mr = NULL;
+ struct ib_mr *ret;
+ int rval;
+
+ if (to_ipd(pd)->user) {
+ ret = ERR_PTR(-EPERM);
+ goto bail;
+ }
+
+ mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+ if (!mr) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ rval = init_mregion(&mr->mr, pd, 0);
+ if (rval) {
+ ret = ERR_PTR(rval);
+ goto bail;
+ }
+
+
+ rval = hfi1_alloc_lkey(&mr->mr, 1);
+ if (rval) {
+ ret = ERR_PTR(rval);
+ goto bail_mregion;
+ }
+
+ mr->mr.access_flags = acc;
+ ret = &mr->ibmr;
+done:
+ return ret;
+
+bail_mregion:
+ deinit_mregion(&mr->mr);
+bail:
+ kfree(mr);
+ goto done;
+}
+
+static struct hfi1_mr *alloc_mr(int count, struct ib_pd *pd)
+{
+ struct hfi1_mr *mr;
+ int rval = -ENOMEM;
+ int m;
+
+ /* Allocate struct plus pointers to first level page tables. */
+ m = (count + HFI1_SEGSZ - 1) / HFI1_SEGSZ;
+ mr = kzalloc(sizeof(*mr) + m * sizeof(mr->mr.map[0]), GFP_KERNEL);
+ if (!mr)
+ goto bail;
+
+ rval = init_mregion(&mr->mr, pd, count);
+ if (rval)
+ goto bail;
+ /*
+ * ib_reg_phys_mr() will initialize mr->ibmr except for
+ * lkey and rkey.
+ */
+ rval = hfi1_alloc_lkey(&mr->mr, 0);
+ if (rval)
+ goto bail_mregion;
+ mr->ibmr.lkey = mr->mr.lkey;
+ mr->ibmr.rkey = mr->mr.lkey;
+done:
+ return mr;
+
+bail_mregion:
+ deinit_mregion(&mr->mr);
+bail:
+ kfree(mr);
+ mr = ERR_PTR(rval);
+ goto done;
+}
+
+/**
+ * hfi1_reg_phys_mr - register a physical memory region
+ * @pd: protection domain for this memory region
+ * @buffer_list: pointer to the list of physical buffers to register
+ * @num_phys_buf: the number of physical buffers to register
+ * @iova_start: the starting address passed over IB which maps to this MR
+ *
+ * Returns the memory region on success, otherwise returns an errno.
+ */
+struct ib_mr *hfi1_reg_phys_mr(struct ib_pd *pd,
+ struct ib_phys_buf *buffer_list,
+ int num_phys_buf, int acc, u64 *iova_start)
+{
+ struct hfi1_mr *mr;
+ int n, m, i;
+ struct ib_mr *ret;
+
+ mr = alloc_mr(num_phys_buf, pd);
+ if (IS_ERR(mr)) {
+ ret = (struct ib_mr *)mr;
+ goto bail;
+ }
+
+ mr->mr.user_base = *iova_start;
+ mr->mr.iova = *iova_start;
+ mr->mr.access_flags = acc;
+
+ m = 0;
+ n = 0;
+ for (i = 0; i < num_phys_buf; i++) {
+ mr->mr.map[m]->segs[n].vaddr = (void *) buffer_list[i].addr;
+ mr->mr.map[m]->segs[n].length = buffer_list[i].size;
+ mr->mr.length += buffer_list[i].size;
+ n++;
+ if (n == HFI1_SEGSZ) {
+ m++;
+ n = 0;
+ }
+ }
+
+ ret = &mr->ibmr;
+
+bail:
+ return ret;
+}
+
+/**
+ * hfi1_reg_user_mr - register a userspace memory region
+ * @pd: protection domain for this memory region
+ * @start: starting userspace address
+ * @length: length of region to register
+ * @mr_access_flags: access flags for this memory region
+ * @udata: unused by the driver
+ *
+ * Returns the memory region on success, otherwise returns an errno.
+ */
+struct ib_mr *hfi1_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+ u64 virt_addr, int mr_access_flags,
+ struct ib_udata *udata)
+{
+ struct hfi1_mr *mr;
+ struct ib_umem *umem;
+ struct scatterlist *sg;
+ int n, m, entry;
+ struct ib_mr *ret;
+
+ if (length == 0) {
+ ret = ERR_PTR(-EINVAL);
+ goto bail;
+ }
+
+ umem = ib_umem_get(pd->uobject->context, start, length,
+ mr_access_flags, 0);
+ if (IS_ERR(umem))
+ return (void *) umem;
+
+ n = umem->nmap;
+
+ mr = alloc_mr(n, pd);
+ if (IS_ERR(mr)) {
+ ret = (struct ib_mr *)mr;
+ ib_umem_release(umem);
+ goto bail;
+ }
+
+ mr->mr.user_base = start;
+ mr->mr.iova = virt_addr;
+ mr->mr.length = length;
+ mr->mr.offset = ib_umem_offset(umem);
+ mr->mr.access_flags = mr_access_flags;
+ mr->umem = umem;
+
+ if (is_power_of_2(umem->page_size))
+ mr->mr.page_shift = ilog2(umem->page_size);
+ m = 0;
+ n = 0;
+ for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
+ void *vaddr;
+
+ vaddr = page_address(sg_page(sg));
+ if (!vaddr) {
+ ret = ERR_PTR(-EINVAL);
+ goto bail;
+ }
+ mr->mr.map[m]->segs[n].vaddr = vaddr;
+ mr->mr.map[m]->segs[n].length = umem->page_size;
+ n++;
+ if (n == HFI1_SEGSZ) {
+ m++;
+ n = 0;
+ }
+ }
+ ret = &mr->ibmr;
+
+bail:
+ return ret;
+}
+
+/**
+ * hfi1_dereg_mr - unregister and free a memory region
+ * @ibmr: the memory region to free
+ *
+ * Returns 0 on success.
+ *
+ * Note that this is called to free MRs created by hfi1_get_dma_mr()
+ * or hfi1_reg_user_mr().
+ */
+int hfi1_dereg_mr(struct ib_mr *ibmr)
+{
+ struct hfi1_mr *mr = to_imr(ibmr);
+ int ret = 0;
+ unsigned long timeout;
+
+ hfi1_free_lkey(&mr->mr);
+
+ hfi1_put_mr(&mr->mr); /* will set completion if last */
+ timeout = wait_for_completion_timeout(&mr->mr.comp,
+ 5 * HZ);
+ if (!timeout) {
+ dd_dev_err(
+ dd_from_ibdev(mr->mr.pd->device),
+ "hfi1_dereg_mr timeout mr %p pd %p refcount %u\n",
+ mr, mr->mr.pd, atomic_read(&mr->mr.refcount));
+ hfi1_get_mr(&mr->mr);
+ ret = -EBUSY;
+ goto out;
+ }
+ deinit_mregion(&mr->mr);
+ if (mr->umem)
+ ib_umem_release(mr->umem);
+ kfree(mr);
+out:
+ return ret;
+}
+
+/*
+ * Allocate a memory region usable with the
+ * IB_WR_FAST_REG_MR send work request.
+ *
+ * Return the memory region on success, otherwise return an errno.
+ */
+struct ib_mr *hfi1_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
+{
+ struct hfi1_mr *mr;
+
+ mr = alloc_mr(max_page_list_len, pd);
+ if (IS_ERR(mr))
+ return (struct ib_mr *)mr;
+
+ return &mr->ibmr;
+}
+
+struct ib_fast_reg_page_list *
+hfi1_alloc_fast_reg_page_list(struct ib_device *ibdev, int page_list_len)
+{
+ unsigned size = page_list_len * sizeof(u64);
+ struct ib_fast_reg_page_list *pl;
+
+ if (size > PAGE_SIZE)
+ return ERR_PTR(-EINVAL);
+
+ pl = kzalloc(sizeof(*pl), GFP_KERNEL);
+ if (!pl)
+ return ERR_PTR(-ENOMEM);
+
+ pl->page_list = kzalloc(size, GFP_KERNEL);
+ if (!pl->page_list)
+ goto err_free;
+
+ return pl;
+
+err_free:
+ kfree(pl);
+ return ERR_PTR(-ENOMEM);
+}
+
+void hfi1_free_fast_reg_page_list(struct ib_fast_reg_page_list *pl)
+{
+ kfree(pl->page_list);
+ kfree(pl);
+}
+
+/**
+ * hfi1_alloc_fmr - allocate a fast memory region
+ * @pd: the protection domain for this memory region
+ * @mr_access_flags: access flags for this memory region
+ * @fmr_attr: fast memory region attributes
+ *
+ * Returns the memory region on success, otherwise returns an errno.
+ */
+struct ib_fmr *hfi1_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
+ struct ib_fmr_attr *fmr_attr)
+{
+ struct hfi1_fmr *fmr;
+ int m;
+ struct ib_fmr *ret;
+ int rval = -ENOMEM;
+
+ /* Allocate struct plus pointers to first level page tables. */
+ m = (fmr_attr->max_pages + HFI1_SEGSZ - 1) / HFI1_SEGSZ;
+ fmr = kzalloc(sizeof(*fmr) + m * sizeof(fmr->mr.map[0]), GFP_KERNEL);
+ if (!fmr)
+ goto bail;
+
+ rval = init_mregion(&fmr->mr, pd, fmr_attr->max_pages);
+ if (rval)
+ goto bail;
+
+ /*
+ * ib_alloc_fmr() will initialize fmr->ibfmr except for lkey &
+ * rkey.
+ */
+ rval = hfi1_alloc_lkey(&fmr->mr, 0);
+ if (rval)
+ goto bail_mregion;
+ fmr->ibfmr.rkey = fmr->mr.lkey;
+ fmr->ibfmr.lkey = fmr->mr.lkey;
+ /*
+ * Resources are allocated but no valid mapping (RKEY can't be
+ * used).
+ */
+ fmr->mr.access_flags = mr_access_flags;
+ fmr->mr.max_segs = fmr_attr->max_pages;
+ fmr->mr.page_shift = fmr_attr->page_shift;
+
+ ret = &fmr->ibfmr;
+done:
+ return ret;
+
+bail_mregion:
+ deinit_mregion(&fmr->mr);
+bail:
+ kfree(fmr);
+ ret = ERR_PTR(rval);
+ goto done;
+}
+
+/**
+ * hfi1_map_phys_fmr - set up a fast memory region
+ * @ibmfr: the fast memory region to set up
+ * @page_list: the list of pages to associate with the fast memory region
+ * @list_len: the number of pages to associate with the fast memory region
+ * @iova: the virtual address of the start of the fast memory region
+ *
+ * This may be called from interrupt context.
+ */
+
+int hfi1_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
+ int list_len, u64 iova)
+{
+ struct hfi1_fmr *fmr = to_ifmr(ibfmr);
+ struct hfi1_lkey_table *rkt;
+ unsigned long flags;
+ int m, n, i;
+ u32 ps;
+ int ret;
+
+ i = atomic_read(&fmr->mr.refcount);
+ if (i > 2)
+ return -EBUSY;
+
+ if (list_len > fmr->mr.max_segs) {
+ ret = -EINVAL;
+ goto bail;
+ }
+ rkt = &to_idev(ibfmr->device)->lk_table;
+ spin_lock_irqsave(&rkt->lock, flags);
+ fmr->mr.user_base = iova;
+ fmr->mr.iova = iova;
+ ps = 1 << fmr->mr.page_shift;
+ fmr->mr.length = list_len * ps;
+ m = 0;
+ n = 0;
+ for (i = 0; i < list_len; i++) {
+ fmr->mr.map[m]->segs[n].vaddr = (void *) page_list[i];
+ fmr->mr.map[m]->segs[n].length = ps;
+ if (++n == HFI1_SEGSZ) {
+ m++;
+ n = 0;
+ }
+ }
+ spin_unlock_irqrestore(&rkt->lock, flags);
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+/**
+ * hfi1_unmap_fmr - unmap fast memory regions
+ * @fmr_list: the list of fast memory regions to unmap
+ *
+ * Returns 0 on success.
+ */
+int hfi1_unmap_fmr(struct list_head *fmr_list)
+{
+ struct hfi1_fmr *fmr;
+ struct hfi1_lkey_table *rkt;
+ unsigned long flags;
+
+ list_for_each_entry(fmr, fmr_list, ibfmr.list) {
+ rkt = &to_idev(fmr->ibfmr.device)->lk_table;
+ spin_lock_irqsave(&rkt->lock, flags);
+ fmr->mr.user_base = 0;
+ fmr->mr.iova = 0;
+ fmr->mr.length = 0;
+ spin_unlock_irqrestore(&rkt->lock, flags);
+ }
+ return 0;
+}
+
+/**
+ * hfi1_dealloc_fmr - deallocate a fast memory region
+ * @ibfmr: the fast memory region to deallocate
+ *
+ * Returns 0 on success.
+ */
+int hfi1_dealloc_fmr(struct ib_fmr *ibfmr)
+{
+ struct hfi1_fmr *fmr = to_ifmr(ibfmr);
+ int ret = 0;
+ unsigned long timeout;
+
+ hfi1_free_lkey(&fmr->mr);
+ hfi1_put_mr(&fmr->mr); /* will set completion if last */
+ timeout = wait_for_completion_timeout(&fmr->mr.comp,
+ 5 * HZ);
+ if (!timeout) {
+ hfi1_get_mr(&fmr->mr);
+ ret = -EBUSY;
+ goto out;
+ }
+ deinit_mregion(&fmr->mr);
+ kfree(fmr);
+out:
+ return ret;
+}
diff --git a/drivers/staging/rdma/hfi1/opa_compat.h b/drivers/staging/rdma/hfi1/opa_compat.h
new file mode 100644
index 0000000..f64eec1
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/opa_compat.h
@@ -0,0 +1,129 @@
+#ifndef _LINUX_H
+#define _LINUX_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+ * This header file is for OPA-specific definitions which are
+ * required by the HFI driver, and which aren't yet in the Linux
+ * IB core. We'll collect these all here, then merge them into
+ * the kernel when that's convenient.
+ */
+
+/* OPA SMA attribute IDs */
+#define OPA_ATTRIB_ID_CONGESTION_INFO cpu_to_be16(0x008b)
+#define OPA_ATTRIB_ID_HFI_CONGESTION_LOG cpu_to_be16(0x008f)
+#define OPA_ATTRIB_ID_HFI_CONGESTION_SETTING cpu_to_be16(0x0090)
+#define OPA_ATTRIB_ID_CONGESTION_CONTROL_TABLE cpu_to_be16(0x0091)
+
+/* OPA PMA attribute IDs */
+#define OPA_PM_ATTRIB_ID_PORT_STATUS cpu_to_be16(0x0040)
+#define OPA_PM_ATTRIB_ID_CLEAR_PORT_STATUS cpu_to_be16(0x0041)
+#define OPA_PM_ATTRIB_ID_DATA_PORT_COUNTERS cpu_to_be16(0x0042)
+#define OPA_PM_ATTRIB_ID_ERROR_PORT_COUNTERS cpu_to_be16(0x0043)
+#define OPA_PM_ATTRIB_ID_ERROR_INFO cpu_to_be16(0x0044)
+
+/* OPA status codes */
+#define OPA_PM_STATUS_REQUEST_TOO_LARGE cpu_to_be16(0x100)
+
+static inline u8 port_states_to_logical_state(struct opa_port_states *ps)
+{
+ return ps->portphysstate_portstate & OPA_PI_MASK_PORT_STATE;
+}
+
+static inline u8 port_states_to_phys_state(struct opa_port_states *ps)
+{
+ return ((ps->portphysstate_portstate &
+ OPA_PI_MASK_PORT_PHYSICAL_STATE) >> 4) & 0xf;
+}
+
+/*
+ * OPA port physical states
+ * IB Volume 1, Table 146 PortInfo/IB Volume 2 Section 5.4.2(1) PortPhysState
+ * values.
+ *
+ * When writing, only values 0-3 are valid, other values are ignored.
+ * When reading, 0 is reserved.
+ *
+ * Returned by the ibphys_portstate() routine.
+ */
+enum opa_port_phys_state {
+ IB_PORTPHYSSTATE_NOP = 0,
+ /* 1 is reserved */
+ IB_PORTPHYSSTATE_POLLING = 2,
+ IB_PORTPHYSSTATE_DISABLED = 3,
+ IB_PORTPHYSSTATE_TRAINING = 4,
+ IB_PORTPHYSSTATE_LINKUP = 5,
+ IB_PORTPHYSSTATE_LINK_ERROR_RECOVERY = 6,
+ IB_PORTPHYSSTATE_PHY_TEST = 7,
+ /* 8 is reserved */
+ OPA_PORTPHYSSTATE_OFFLINE = 9,
+ OPA_PORTPHYSSTATE_GANGED = 10,
+ OPA_PORTPHYSSTATE_TEST = 11,
+ OPA_PORTPHYSSTATE_MAX = 11,
+ /* values 12-15 are reserved/ignored */
+};
+
+/* OPA_PORT_TYPE_* definitions - these belong in opa_port_info.h */
+#define OPA_PORT_TYPE_UNKNOWN 0
+#define OPA_PORT_TYPE_DISCONNECTED 1
+/* port is not currently usable, CableInfo not available */
+#define OPA_PORT_TYPE_FIXED 2
+/* A fixed backplane port in a director class switch. All OPA ASICS */
+#define OPA_PORT_TYPE_VARIABLE 3
+/* A backplane port in a blade system, possibly mixed configuration */
+#define OPA_PORT_TYPE_STANDARD 4
+/* implies a SFF-8636 defined format for CableInfo (QSFP) */
+#define OPA_PORT_TYPE_SI_PHOTONICS 5
+/* A silicon photonics module implies TBD defined format for CableInfo
+ * as defined by Intel SFO group */
+/* 6 - 15 are reserved */
+
+#endif /* _LINUX_H */
diff --git a/drivers/staging/rdma/hfi1/pcie.c b/drivers/staging/rdma/hfi1/pcie.c
new file mode 100644
index 0000000..ac5653c
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/pcie.c
@@ -0,0 +1,1253 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/vmalloc.h>
+#include <linux/aer.h>
+#include <linux/module.h>
+
+#include "hfi.h"
+#include "chip_registers.h"
+
+/* link speed vector for Gen3 speed - not in Linux headers */
+#define GEN1_SPEED_VECTOR 0x1
+#define GEN2_SPEED_VECTOR 0x2
+#define GEN3_SPEED_VECTOR 0x3
+
+/*
+ * This file contains PCIe utility routines.
+ */
+
+/*
+ * Code to adjust PCIe capabilities.
+ */
+static void tune_pcie_caps(struct hfi1_devdata *);
+
+/*
+ * Do all the common PCIe setup and initialization.
+ * devdata is not yet allocated, and is not allocated until after this
+ * routine returns success. Therefore dd_dev_err() can't be used for error
+ * printing.
+ */
+int hfi1_pcie_init(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ int ret;
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ /*
+ * This can happen (in theory) iff:
+ * We did a chip reset, and then failed to reprogram the
+ * BAR, or the chip reset due to an internal error. We then
+ * unloaded the driver and reloaded it.
+ *
+ * Both reset cases set the BAR back to initial state. For
+ * the latter case, the AER sticky error bit at offset 0x718
+ * should be set, but the Linux kernel doesn't yet know
+ * about that, it appears. If the original BAR was retained
+ * in the kernel data structures, this may be OK.
+ */
+ hfi1_early_err(&pdev->dev, "pci enable failed: error %d\n",
+ -ret);
+ goto done;
+ }
+
+ ret = pci_request_regions(pdev, DRIVER_NAME);
+ if (ret) {
+ hfi1_early_err(&pdev->dev,
+ "pci_request_regions fails: err %d\n", -ret);
+ goto bail;
+ }
+
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (ret) {
+ /*
+ * If the 64 bit setup fails, try 32 bit. Some systems
+ * do not setup 64 bit maps on systems with 2GB or less
+ * memory installed.
+ */
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (ret) {
+ hfi1_early_err(&pdev->dev,
+ "Unable to set DMA mask: %d\n", ret);
+ goto bail;
+ }
+ ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+ } else
+ ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (ret) {
+ hfi1_early_err(&pdev->dev,
+ "Unable to set DMA consistent mask: %d\n", ret);
+ goto bail;
+ }
+
+ pci_set_master(pdev);
+ ret = pci_enable_pcie_error_reporting(pdev);
+ if (ret) {
+ hfi1_early_err(&pdev->dev,
+ "Unable to enable pcie error reporting: %d\n",
+ ret);
+ ret = 0;
+ }
+ goto done;
+
+bail:
+ hfi1_pcie_cleanup(pdev);
+done:
+ return ret;
+}
+
+/*
+ * Clean what was done in hfi1_pcie_init()
+ */
+void hfi1_pcie_cleanup(struct pci_dev *pdev)
+{
+ pci_disable_device(pdev);
+ /*
+ * Release regions should be called after the disable. OK to
+ * call if request regions has not been called or failed.
+ */
+ pci_release_regions(pdev);
+}
+
+/*
+ * Do remaining PCIe setup, once dd is allocated, and save away
+ * fields required to re-initialize after a chip reset, or for
+ * various other purposes
+ */
+int hfi1_pcie_ddinit(struct hfi1_devdata *dd, struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ unsigned long len;
+ resource_size_t addr;
+
+ dd->pcidev = pdev;
+ pci_set_drvdata(pdev, dd);
+
+ addr = pci_resource_start(pdev, 0);
+ len = pci_resource_len(pdev, 0);
+
+ /*
+ * The TXE PIO buffers are at the tail end of the chip space.
+ * Cut them off and map them separately.
+ */
+
+ /* sanity check vs expectations */
+ if (len != TXE_PIO_SEND + TXE_PIO_SIZE) {
+ dd_dev_err(dd, "chip PIO range does not match\n");
+ return -EINVAL;
+ }
+
+ dd->kregbase = ioremap_nocache(addr, TXE_PIO_SEND);
+ if (!dd->kregbase)
+ return -ENOMEM;
+
+ dd->piobase = ioremap_wc(addr + TXE_PIO_SEND, TXE_PIO_SIZE);
+ if (!dd->piobase) {
+ iounmap(dd->kregbase);
+ return -ENOMEM;
+ }
+
+ dd->flags |= HFI1_PRESENT; /* now register routines work */
+
+ dd->kregend = dd->kregbase + TXE_PIO_SEND;
+ dd->physaddr = addr; /* used for io_remap, etc. */
+
+ /*
+ * Re-map the chip's RcvArray as write-combining to allow us
+ * to write an entire cacheline worth of entries in one shot.
+ * If this re-map fails, just continue - the RcvArray programming
+ * function will handle both cases.
+ */
+ dd->chip_rcv_array_count = read_csr(dd, RCV_ARRAY_CNT);
+ dd->rcvarray_wc = ioremap_wc(addr + RCV_ARRAY,
+ dd->chip_rcv_array_count * 8);
+ dd_dev_info(dd, "WC Remapped RcvArray: %p\n", dd->rcvarray_wc);
+ /*
+ * Save BARs and command to rewrite after device reset.
+ */
+ dd->pcibar0 = addr;
+ dd->pcibar1 = addr >> 32;
+ pci_read_config_dword(dd->pcidev, PCI_ROM_ADDRESS, &dd->pci_rom);
+ pci_read_config_word(dd->pcidev, PCI_COMMAND, &dd->pci_command);
+ pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVCTL, &dd->pcie_devctl);
+ pcie_capability_read_word(dd->pcidev, PCI_EXP_LNKCTL, &dd->pcie_lnkctl);
+ pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVCTL2,
+ &dd->pcie_devctl2);
+ pci_read_config_dword(dd->pcidev, PCI_CFG_MSIX0, &dd->pci_msix0);
+ pci_read_config_dword(dd->pcidev, PCIE_CFG_SPCIE1,
+ &dd->pci_lnkctl3);
+ pci_read_config_dword(dd->pcidev, PCIE_CFG_TPH2, &dd->pci_tph2);
+
+ return 0;
+}
+
+/*
+ * Do PCIe cleanup related to dd, after chip-specific cleanup, etc. Just prior
+ * to releasing the dd memory.
+ * Void because all of the core pcie cleanup functions are void.
+ */
+void hfi1_pcie_ddcleanup(struct hfi1_devdata *dd)
+{
+ u64 __iomem *base = (void __iomem *) dd->kregbase;
+
+ dd->flags &= ~HFI1_PRESENT;
+ dd->kregbase = NULL;
+ iounmap(base);
+ if (dd->rcvarray_wc)
+ iounmap(dd->rcvarray_wc);
+ if (dd->piobase)
+ iounmap(dd->piobase);
+
+ pci_set_drvdata(dd->pcidev, NULL);
+}
+
+/*
+ * Do a Function Level Reset (FLR) on the device.
+ * Based on static function drivers/pci/pci.c:pcie_flr().
+ */
+void hfi1_pcie_flr(struct hfi1_devdata *dd)
+{
+ int i;
+ u16 status;
+
+ /* no need to check for the capability - we know the device has it */
+
+ /* wait for Transaction Pending bit to clear, at most a few ms */
+ for (i = 0; i < 4; i++) {
+ if (i)
+ msleep((1 << (i - 1)) * 100);
+
+ pcie_capability_read_word(dd->pcidev, PCI_EXP_DEVSTA, &status);
+ if (!(status & PCI_EXP_DEVSTA_TRPND))
+ goto clear;
+ }
+
+ dd_dev_err(dd, "Transaction Pending bit is not clearing, proceeding with reset anyway\n");
+
+clear:
+ pcie_capability_set_word(dd->pcidev, PCI_EXP_DEVCTL,
+ PCI_EXP_DEVCTL_BCR_FLR);
+ /* PCIe spec requires the function to be back within 100ms */
+ msleep(100);
+}
+
+static void msix_setup(struct hfi1_devdata *dd, int pos, u32 *msixcnt,
+ struct hfi1_msix_entry *hfi1_msix_entry)
+{
+ int ret;
+ int nvec = *msixcnt;
+ struct msix_entry *msix_entry;
+ int i;
+
+ /* We can't pass hfi1_msix_entry array to msix_setup
+ * so use a dummy msix_entry array and copy the allocated
+ * irq back to the hfi1_msix_entry array. */
+ msix_entry = kmalloc_array(nvec, sizeof(*msix_entry), GFP_KERNEL);
+ if (!msix_entry) {
+ ret = -ENOMEM;
+ goto do_intx;
+ }
+
+ for (i = 0; i < nvec; i++)
+ msix_entry[i] = hfi1_msix_entry[i].msix;
+
+ ret = pci_enable_msix_range(dd->pcidev, msix_entry, 1, nvec);
+ if (ret < 0)
+ goto free_msix_entry;
+ nvec = ret;
+
+ for (i = 0; i < nvec; i++)
+ hfi1_msix_entry[i].msix = msix_entry[i];
+
+ kfree(msix_entry);
+ *msixcnt = nvec;
+ return;
+
+free_msix_entry:
+ kfree(msix_entry);
+
+do_intx:
+ dd_dev_err(dd, "pci_enable_msix_range %d vectors failed: %d, falling back to INTx\n",
+ nvec, ret);
+ *msixcnt = 0;
+ hfi1_enable_intx(dd->pcidev);
+
+}
+
+/* return the PCIe link speed from the given link status */
+static u32 extract_speed(u16 linkstat)
+{
+ u32 speed;
+
+ switch (linkstat & PCI_EXP_LNKSTA_CLS) {
+ default: /* not defined, assume Gen1 */
+ case PCI_EXP_LNKSTA_CLS_2_5GB:
+ speed = 2500; /* Gen 1, 2.5GHz */
+ break;
+ case PCI_EXP_LNKSTA_CLS_5_0GB:
+ speed = 5000; /* Gen 2, 5GHz */
+ break;
+ case GEN3_SPEED_VECTOR:
+ speed = 8000; /* Gen 3, 8GHz */
+ break;
+ }
+ return speed;
+}
+
+/* return the PCIe link speed from the given link status */
+static u32 extract_width(u16 linkstat)
+{
+ return (linkstat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT;
+}
+
+/* read the link status and set dd->{lbus_width,lbus_speed,lbus_info} */
+static void update_lbus_info(struct hfi1_devdata *dd)
+{
+ u16 linkstat;
+
+ pcie_capability_read_word(dd->pcidev, PCI_EXP_LNKSTA, &linkstat);
+ dd->lbus_width = extract_width(linkstat);
+ dd->lbus_speed = extract_speed(linkstat);
+ snprintf(dd->lbus_info, sizeof(dd->lbus_info),
+ "PCIe,%uMHz,x%u", dd->lbus_speed, dd->lbus_width);
+}
+
+/*
+ * Read in the current PCIe link width and speed. Find if the link is
+ * Gen3 capable.
+ */
+int pcie_speeds(struct hfi1_devdata *dd)
+{
+ u32 linkcap;
+
+ if (!pci_is_pcie(dd->pcidev)) {
+ dd_dev_err(dd, "Can't find PCI Express capability!\n");
+ return -EINVAL;
+ }
+
+ /* find if our max speed is Gen3 and parent supports Gen3 speeds */
+ dd->link_gen3_capable = 1;
+
+ pcie_capability_read_dword(dd->pcidev, PCI_EXP_LNKCAP, &linkcap);
+ if ((linkcap & PCI_EXP_LNKCAP_SLS) != GEN3_SPEED_VECTOR) {
+ dd_dev_info(dd,
+ "This HFI is not Gen3 capable, max speed 0x%x, need 0x3\n",
+ linkcap & PCI_EXP_LNKCAP_SLS);
+ dd->link_gen3_capable = 0;
+ }
+
+ /*
+ * bus->max_bus_speed is set from the bridge's linkcap Max Link Speed
+ */
+ if (dd->pcidev->bus->max_bus_speed != PCIE_SPEED_8_0GT) {
+ dd_dev_info(dd, "Parent PCIe bridge does not support Gen3\n");
+ dd->link_gen3_capable = 0;
+ }
+
+ /* obtain the link width and current speed */
+ update_lbus_info(dd);
+
+ /* check against expected pcie width and complain if "wrong" */
+ if (dd->lbus_width < 16)
+ dd_dev_err(dd, "PCIe width %u (x16 HFI)\n", dd->lbus_width);
+
+ return 0;
+}
+
+/*
+ * Returns in *nent:
+ * - actual number of interrupts allocated
+ * - 0 if fell back to INTx.
+ */
+void request_msix(struct hfi1_devdata *dd, u32 *nent,
+ struct hfi1_msix_entry *entry)
+{
+ int pos;
+
+ pos = dd->pcidev->msix_cap;
+ if (*nent && pos) {
+ msix_setup(dd, pos, nent, entry);
+ /* did it, either MSI-X or INTx */
+ } else {
+ *nent = 0;
+ hfi1_enable_intx(dd->pcidev);
+ }
+
+ tune_pcie_caps(dd);
+}
+
+/*
+ * Disable MSI-X.
+ */
+void hfi1_nomsix(struct hfi1_devdata *dd)
+{
+ pci_disable_msix(dd->pcidev);
+}
+
+void hfi1_enable_intx(struct pci_dev *pdev)
+{
+ /* first, turn on INTx */
+ pci_intx(pdev, 1);
+ /* then turn off MSI-X */
+ pci_disable_msix(pdev);
+}
+
+/* restore command and BARs after a reset has wiped them out */
+void restore_pci_variables(struct hfi1_devdata *dd)
+{
+ pci_write_config_word(dd->pcidev, PCI_COMMAND, dd->pci_command);
+ pci_write_config_dword(dd->pcidev,
+ PCI_BASE_ADDRESS_0, dd->pcibar0);
+ pci_write_config_dword(dd->pcidev,
+ PCI_BASE_ADDRESS_1, dd->pcibar1);
+ pci_write_config_dword(dd->pcidev,
+ PCI_ROM_ADDRESS, dd->pci_rom);
+ pcie_capability_write_word(dd->pcidev, PCI_EXP_DEVCTL, dd->pcie_devctl);
+ pcie_capability_write_word(dd->pcidev, PCI_EXP_LNKCTL, dd->pcie_lnkctl);
+ pcie_capability_write_word(dd->pcidev, PCI_EXP_DEVCTL2,
+ dd->pcie_devctl2);
+ pci_write_config_dword(dd->pcidev, PCI_CFG_MSIX0, dd->pci_msix0);
+ pci_write_config_dword(dd->pcidev, PCIE_CFG_SPCIE1,
+ dd->pci_lnkctl3);
+ pci_write_config_dword(dd->pcidev, PCIE_CFG_TPH2, dd->pci_tph2);
+}
+
+
+/*
+ * BIOS may not set PCIe bus-utilization parameters for best performance.
+ * Check and optionally adjust them to maximize our throughput.
+ */
+static int hfi1_pcie_caps;
+module_param_named(pcie_caps, hfi1_pcie_caps, int, S_IRUGO);
+MODULE_PARM_DESC(pcie_caps, "Max PCIe tuning: Payload (0..3), ReadReq (4..7)");
+
+static void tune_pcie_caps(struct hfi1_devdata *dd)
+{
+ struct pci_dev *parent;
+ u16 rc_mpss, rc_mps, ep_mpss, ep_mps;
+ u16 rc_mrrs, ep_mrrs, max_mrrs;
+
+ /* Find out supported and configured values for parent (root) */
+ parent = dd->pcidev->bus->self;
+ if (!pci_is_root_bus(parent->bus)) {
+ dd_dev_info(dd, "Parent not root\n");
+ return;
+ }
+
+ if (!pci_is_pcie(parent) || !pci_is_pcie(dd->pcidev))
+ return;
+ rc_mpss = parent->pcie_mpss;
+ rc_mps = ffs(pcie_get_mps(parent)) - 8;
+ /* Find out supported and configured values for endpoint (us) */
+ ep_mpss = dd->pcidev->pcie_mpss;
+ ep_mps = ffs(pcie_get_mps(dd->pcidev)) - 8;
+
+ /* Find max payload supported by root, endpoint */
+ if (rc_mpss > ep_mpss)
+ rc_mpss = ep_mpss;
+
+ /* If Supported greater than limit in module param, limit it */
+ if (rc_mpss > (hfi1_pcie_caps & 7))
+ rc_mpss = hfi1_pcie_caps & 7;
+ /* If less than (allowed, supported), bump root payload */
+ if (rc_mpss > rc_mps) {
+ rc_mps = rc_mpss;
+ pcie_set_mps(parent, 128 << rc_mps);
+ }
+ /* If less than (allowed, supported), bump endpoint payload */
+ if (rc_mpss > ep_mps) {
+ ep_mps = rc_mpss;
+ pcie_set_mps(dd->pcidev, 128 << ep_mps);
+ }
+
+ /*
+ * Now the Read Request size.
+ * No field for max supported, but PCIe spec limits it to 4096,
+ * which is code '5' (log2(4096) - 7)
+ */
+ max_mrrs = 5;
+ if (max_mrrs > ((hfi1_pcie_caps >> 4) & 7))
+ max_mrrs = (hfi1_pcie_caps >> 4) & 7;
+
+ max_mrrs = 128 << max_mrrs;
+ rc_mrrs = pcie_get_readrq(parent);
+ ep_mrrs = pcie_get_readrq(dd->pcidev);
+
+ if (max_mrrs > rc_mrrs) {
+ rc_mrrs = max_mrrs;
+ pcie_set_readrq(parent, rc_mrrs);
+ }
+ if (max_mrrs > ep_mrrs) {
+ ep_mrrs = max_mrrs;
+ pcie_set_readrq(dd->pcidev, ep_mrrs);
+ }
+}
+/* End of PCIe capability tuning */
+
+/*
+ * From here through hfi1_pci_err_handler definition is invoked via
+ * PCI error infrastructure, registered via pci
+ */
+static pci_ers_result_t
+pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
+{
+ struct hfi1_devdata *dd = pci_get_drvdata(pdev);
+ pci_ers_result_t ret = PCI_ERS_RESULT_RECOVERED;
+
+ switch (state) {
+ case pci_channel_io_normal:
+ dd_dev_info(dd, "State Normal, ignoring\n");
+ break;
+
+ case pci_channel_io_frozen:
+ dd_dev_info(dd, "State Frozen, requesting reset\n");
+ pci_disable_device(pdev);
+ ret = PCI_ERS_RESULT_NEED_RESET;
+ break;
+
+ case pci_channel_io_perm_failure:
+ if (dd) {
+ dd_dev_info(dd, "State Permanent Failure, disabling\n");
+ /* no more register accesses! */
+ dd->flags &= ~HFI1_PRESENT;
+ hfi1_disable_after_error(dd);
+ }
+ /* else early, or other problem */
+ ret = PCI_ERS_RESULT_DISCONNECT;
+ break;
+
+ default: /* shouldn't happen */
+ dd_dev_info(dd, "HFI1 PCI errors detected (state %d)\n",
+ state);
+ break;
+ }
+ return ret;
+}
+
+static pci_ers_result_t
+pci_mmio_enabled(struct pci_dev *pdev)
+{
+ u64 words = 0U;
+ struct hfi1_devdata *dd = pci_get_drvdata(pdev);
+ pci_ers_result_t ret = PCI_ERS_RESULT_RECOVERED;
+
+ if (dd && dd->pport) {
+ words = read_port_cntr(dd->pport, C_RX_WORDS, CNTR_INVALID_VL);
+ if (words == ~0ULL)
+ ret = PCI_ERS_RESULT_NEED_RESET;
+ dd_dev_info(dd,
+ "HFI1 mmio_enabled function called, read wordscntr %Lx, returning %d\n",
+ words, ret);
+ }
+ return ret;
+}
+
+static pci_ers_result_t
+pci_slot_reset(struct pci_dev *pdev)
+{
+ struct hfi1_devdata *dd = pci_get_drvdata(pdev);
+
+ dd_dev_info(dd, "HFI1 slot_reset function called, ignored\n");
+ return PCI_ERS_RESULT_CAN_RECOVER;
+}
+
+static pci_ers_result_t
+pci_link_reset(struct pci_dev *pdev)
+{
+ struct hfi1_devdata *dd = pci_get_drvdata(pdev);
+
+ dd_dev_info(dd, "HFI1 link_reset function called, ignored\n");
+ return PCI_ERS_RESULT_CAN_RECOVER;
+}
+
+static void
+pci_resume(struct pci_dev *pdev)
+{
+ struct hfi1_devdata *dd = pci_get_drvdata(pdev);
+
+ dd_dev_info(dd, "HFI1 resume function called\n");
+ pci_cleanup_aer_uncorrect_error_status(pdev);
+ /*
+ * Running jobs will fail, since it's asynchronous
+ * unlike sysfs-requested reset. Better than
+ * doing nothing.
+ */
+ hfi1_init(dd, 1); /* same as re-init after reset */
+}
+
+const struct pci_error_handlers hfi1_pci_err_handler = {
+ .error_detected = pci_error_detected,
+ .mmio_enabled = pci_mmio_enabled,
+ .link_reset = pci_link_reset,
+ .slot_reset = pci_slot_reset,
+ .resume = pci_resume,
+};
+
+/*============================================================================*/
+/* PCIe Gen3 support */
+
+/*
+ * This code is separated out because it is expected to be removed in the
+ * final shipping product. If not, then it will be revisited and items
+ * will be moved to more standard locations.
+ */
+
+/* ASIC_PCI_SD_HOST_STATUS.FW_DNLD_STS field values */
+#define DL_STATUS_HFI0 0x1 /* hfi0 firmware download complete */
+#define DL_STATUS_HFI1 0x2 /* hfi1 firmware download complete */
+#define DL_STATUS_BOTH 0x3 /* hfi0 and hfi1 firmware download complete */
+
+/* ASIC_PCI_SD_HOST_STATUS.FW_DNLD_ERR field values */
+#define DL_ERR_NONE 0x0 /* no error */
+#define DL_ERR_SWAP_PARITY 0x1 /* parity error in SerDes interrupt */
+ /* or response data */
+#define DL_ERR_DISABLED 0x2 /* hfi disabled */
+#define DL_ERR_SECURITY 0x3 /* security check failed */
+#define DL_ERR_SBUS 0x4 /* SBus status error */
+#define DL_ERR_XFR_PARITY 0x5 /* parity error during ROM transfer*/
+
+/* gasket block secondary bus reset delay */
+#define SBR_DELAY_US 200000 /* 200ms */
+
+/* mask for PCIe capability register lnkctl2 target link speed */
+#define LNKCTL2_TARGET_LINK_SPEED_MASK 0xf
+
+static uint pcie_target = 3;
+module_param(pcie_target, uint, S_IRUGO);
+MODULE_PARM_DESC(pcie_target, "PCIe target speed (0 skip, 1-3 Gen1-3)");
+
+static uint pcie_force;
+module_param(pcie_force, uint, S_IRUGO);
+MODULE_PARM_DESC(pcie_force, "Force driver to do a PCIe firmware download even if already at target speed");
+
+static uint pcie_retry = 5;
+module_param(pcie_retry, uint, S_IRUGO);
+MODULE_PARM_DESC(pcie_retry, "Driver will try this many times to reach requested speed");
+
+#define UNSET_PSET 255
+#define DEFAULT_DISCRETE_PSET 2 /* discrete HFI */
+#define DEFAULT_MCP_PSET 4 /* MCP HFI */
+static uint pcie_pset = UNSET_PSET;
+module_param(pcie_pset, uint, S_IRUGO);
+MODULE_PARM_DESC(pcie_pset, "PCIe Eq Pset value to use, range is 0-10");
+
+/* equalization columns */
+#define PREC 0
+#define ATTN 1
+#define POST 2
+
+/* discrete silicon preliminary equalization values */
+static const u8 discrete_preliminary_eq[11][3] = {
+ /* prec attn post */
+ { 0x00, 0x00, 0x12 }, /* p0 */
+ { 0x00, 0x00, 0x0c }, /* p1 */
+ { 0x00, 0x00, 0x0f }, /* p2 */
+ { 0x00, 0x00, 0x09 }, /* p3 */
+ { 0x00, 0x00, 0x00 }, /* p4 */
+ { 0x06, 0x00, 0x00 }, /* p5 */
+ { 0x09, 0x00, 0x00 }, /* p6 */
+ { 0x06, 0x00, 0x0f }, /* p7 */
+ { 0x09, 0x00, 0x09 }, /* p8 */
+ { 0x0c, 0x00, 0x00 }, /* p9 */
+ { 0x00, 0x00, 0x18 }, /* p10 */
+};
+
+/* integrated silicon preliminary equalization values */
+static const u8 integrated_preliminary_eq[11][3] = {
+ /* prec attn post */
+ { 0x00, 0x1e, 0x07 }, /* p0 */
+ { 0x00, 0x1e, 0x05 }, /* p1 */
+ { 0x00, 0x1e, 0x06 }, /* p2 */
+ { 0x00, 0x1e, 0x04 }, /* p3 */
+ { 0x00, 0x1e, 0x00 }, /* p4 */
+ { 0x03, 0x1e, 0x00 }, /* p5 */
+ { 0x04, 0x1e, 0x00 }, /* p6 */
+ { 0x03, 0x1e, 0x06 }, /* p7 */
+ { 0x03, 0x1e, 0x04 }, /* p8 */
+ { 0x05, 0x1e, 0x00 }, /* p9 */
+ { 0x00, 0x1e, 0x0a }, /* p10 */
+};
+
+/* helper to format the value to write to hardware */
+#define eq_value(pre, curr, post) \
+ ((((u32)(pre)) << \
+ PCIE_CFG_REG_PL102_GEN3_EQ_PRE_CURSOR_PSET_SHIFT) \
+ | (((u32)(curr)) << PCIE_CFG_REG_PL102_GEN3_EQ_CURSOR_PSET_SHIFT) \
+ | (((u32)(post)) << \
+ PCIE_CFG_REG_PL102_GEN3_EQ_POST_CURSOR_PSET_SHIFT))
+
+/*
+ * Load the given EQ preset table into the PCIe hardware.
+ */
+static int load_eq_table(struct hfi1_devdata *dd, const u8 eq[11][3], u8 fs,
+ u8 div)
+{
+ struct pci_dev *pdev = dd->pcidev;
+ u32 hit_error = 0;
+ u32 violation;
+ u32 i;
+ u8 c_minus1, c0, c_plus1;
+
+ for (i = 0; i < 11; i++) {
+ /* set index */
+ pci_write_config_dword(pdev, PCIE_CFG_REG_PL103, i);
+ /* write the value */
+ c_minus1 = eq[i][PREC] / div;
+ c0 = fs - (eq[i][PREC] / div) - (eq[i][POST] / div);
+ c_plus1 = eq[i][POST] / div;
+ pci_write_config_dword(pdev, PCIE_CFG_REG_PL102,
+ eq_value(c_minus1, c0, c_plus1));
+ /* check if these coefficients violate EQ rules */
+ pci_read_config_dword(dd->pcidev, PCIE_CFG_REG_PL105,
+ &violation);
+ if (violation
+ & PCIE_CFG_REG_PL105_GEN3_EQ_VIOLATE_COEF_RULES_SMASK){
+ if (hit_error == 0) {
+ dd_dev_err(dd,
+ "Gen3 EQ Table Coefficient rule violations\n");
+ dd_dev_err(dd, " prec attn post\n");
+ }
+ dd_dev_err(dd, " p%02d: %02x %02x %02x\n",
+ i, (u32)eq[i][0], (u32)eq[i][1], (u32)eq[i][2]);
+ dd_dev_err(dd, " %02x %02x %02x\n",
+ (u32)c_minus1, (u32)c0, (u32)c_plus1);
+ hit_error = 1;
+ }
+ }
+ if (hit_error)
+ return -EINVAL;
+ return 0;
+}
+
+/*
+ * Steps to be done after the PCIe firmware is downloaded and
+ * before the SBR for the Pcie Gen3.
+ * The hardware mutex is already being held.
+ */
+static void pcie_post_steps(struct hfi1_devdata *dd)
+{
+ int i;
+
+ set_sbus_fast_mode(dd);
+ /*
+ * Write to the PCIe PCSes to set the G3_LOCKED_NEXT bits to 1.
+ * This avoids a spurious framing error that can otherwise be
+ * generated by the MAC layer.
+ *
+ * Use individual addresses since no broadcast is set up.
+ */
+ for (i = 0; i < NUM_PCIE_SERDES; i++) {
+ sbus_request(dd, pcie_pcs_addrs[dd->hfi1_id][i],
+ 0x03, WRITE_SBUS_RECEIVER, 0x00022132);
+ }
+
+ clear_sbus_fast_mode(dd);
+}
+
+/*
+ * Trigger a secondary bus reset (SBR) on ourselves using our parent.
+ *
+ * Based on pci_parent_bus_reset() which is not exported by the
+ * kernel core.
+ */
+static int trigger_sbr(struct hfi1_devdata *dd)
+{
+ struct pci_dev *dev = dd->pcidev;
+ struct pci_dev *pdev;
+
+ /* need a parent */
+ if (!dev->bus->self) {
+ dd_dev_err(dd, "%s: no parent device\n", __func__);
+ return -ENOTTY;
+ }
+
+ /* should not be anyone else on the bus */
+ list_for_each_entry(pdev, &dev->bus->devices, bus_list)
+ if (pdev != dev) {
+ dd_dev_err(dd,
+ "%s: another device is on the same bus\n",
+ __func__);
+ return -ENOTTY;
+ }
+
+ /*
+ * A secondary bus reset (SBR) issues a hot reset to our device.
+ * The following routine does a 1s wait after the reset is dropped
+ * per PCI Trhfa (recovery time). PCIe 3.0 section 6.6.1 -
+ * Conventional Reset, paragraph 3, line 35 also says that a 1s
+ * delay after a reset is required. Per spec requirements,
+ * the link is either working or not after that point.
+ */
+ pci_reset_bridge_secondary_bus(dev->bus->self);
+
+ return 0;
+}
+
+/*
+ * Write the given gasket interrupt register.
+ */
+static void write_gasket_interrupt(struct hfi1_devdata *dd, int index,
+ u16 code, u16 data)
+{
+ write_csr(dd, ASIC_PCIE_SD_INTRPT_LIST + (index * 8),
+ (((u64)code << ASIC_PCIE_SD_INTRPT_LIST_INTRPT_CODE_SHIFT)
+ |((u64)data << ASIC_PCIE_SD_INTRPT_LIST_INTRPT_DATA_SHIFT)));
+}
+
+/*
+ * Tell the gasket logic how to react to the reset.
+ */
+static void arm_gasket_logic(struct hfi1_devdata *dd)
+{
+ u64 reg;
+
+ reg = (((u64)1 << dd->hfi1_id)
+ << ASIC_PCIE_SD_HOST_CMD_INTRPT_CMD_SHIFT)
+ | ((u64)pcie_serdes_broadcast[dd->hfi1_id]
+ << ASIC_PCIE_SD_HOST_CMD_SBUS_RCVR_ADDR_SHIFT
+ | ASIC_PCIE_SD_HOST_CMD_SBR_MODE_SMASK
+ | ((u64)SBR_DELAY_US & ASIC_PCIE_SD_HOST_CMD_TIMER_MASK)
+ << ASIC_PCIE_SD_HOST_CMD_TIMER_SHIFT
+ );
+ write_csr(dd, ASIC_PCIE_SD_HOST_CMD, reg);
+ /* read back to push the write */
+ read_csr(dd, ASIC_PCIE_SD_HOST_CMD);
+}
+
+/*
+ * Do all the steps needed to transition the PCIe link to Gen3 speed.
+ */
+int do_pcie_gen3_transition(struct hfi1_devdata *dd)
+{
+ struct pci_dev *parent;
+ u64 fw_ctrl;
+ u64 reg, therm;
+ u32 reg32, fs, lf;
+ u32 status, err;
+ int ret;
+ int do_retry, retry_count = 0;
+ uint default_pset;
+ u16 target_vector, target_speed;
+ u16 lnkctl, lnkctl2, vendor;
+ u8 nsbr = 1;
+ u8 div;
+ const u8 (*eq)[3];
+ int return_error = 0;
+
+ /* PCIe Gen3 is for the ASIC only */
+ if (dd->icode != ICODE_RTL_SILICON)
+ return 0;
+
+ if (pcie_target == 1) { /* target Gen1 */
+ target_vector = GEN1_SPEED_VECTOR;
+ target_speed = 2500;
+ } else if (pcie_target == 2) { /* target Gen2 */
+ target_vector = GEN2_SPEED_VECTOR;
+ target_speed = 5000;
+ } else if (pcie_target == 3) { /* target Gen3 */
+ target_vector = GEN3_SPEED_VECTOR;
+ target_speed = 8000;
+ } else {
+ /* off or invalid target - skip */
+ dd_dev_info(dd, "%s: Skipping PCIe transition\n", __func__);
+ return 0;
+ }
+
+ /* if already at target speed, done (unless forced) */
+ if (dd->lbus_speed == target_speed) {
+ dd_dev_info(dd, "%s: PCIe already at gen%d, %s\n", __func__,
+ pcie_target,
+ pcie_force ? "re-doing anyway" : "skipping");
+ if (!pcie_force)
+ return 0;
+ }
+
+ /*
+ * A0 needs an additional SBR
+ */
+ if (is_a0(dd))
+ nsbr++;
+
+ /*
+ * Do the Gen3 transition. Steps are those of the PCIe Gen3
+ * recipe.
+ */
+
+ /* step 1: pcie link working in gen1/gen2 */
+
+ /* step 2: if either side is not capable of Gen3, done */
+ if (pcie_target == 3 && !dd->link_gen3_capable) {
+ dd_dev_err(dd, "The PCIe link is not Gen3 capable\n");
+ ret = -ENOSYS;
+ goto done_no_mutex;
+ }
+
+ /* hold the HW mutex across the firmware download and SBR */
+ ret = acquire_hw_mutex(dd);
+ if (ret)
+ return ret;
+
+ /* make sure thermal polling is not causing interrupts */
+ therm = read_csr(dd, ASIC_CFG_THERM_POLL_EN);
+ if (therm) {
+ write_csr(dd, ASIC_CFG_THERM_POLL_EN, 0x0);
+ msleep(100);
+ dd_dev_info(dd, "%s: Disabled therm polling\n",
+ __func__);
+ }
+
+ /* step 3: download SBus Master firmware */
+ /* step 4: download PCIe Gen3 SerDes firmware */
+retry:
+ dd_dev_info(dd, "%s: downloading firmware\n", __func__);
+ ret = load_pcie_firmware(dd);
+ if (ret)
+ goto done;
+
+ /* step 5: set up device parameter settings */
+ dd_dev_info(dd, "%s: setting PCIe registers\n", __func__);
+
+ /*
+ * PcieCfgSpcie1 - Link Control 3
+ * Leave at reset value. No need to set PerfEq - link equalization
+ * will be performed automatically after the SBR when the target
+ * speed is 8GT/s.
+ */
+
+ /* clear all 16 per-lane error bits (PCIe: Lane Error Status) */
+ pci_write_config_dword(dd->pcidev, PCIE_CFG_SPCIE2, 0xffff);
+
+ /* step 5a: Set Synopsys Port Logic registers */
+
+ /*
+ * PcieCfgRegPl2 - Port Force Link
+ *
+ * Set the low power field to 0x10 to avoid unnecessary power
+ * management messages. All other fields are zero.
+ */
+ reg32 = 0x10ul << PCIE_CFG_REG_PL2_LOW_PWR_ENT_CNT_SHIFT;
+ pci_write_config_dword(dd->pcidev, PCIE_CFG_REG_PL2, reg32);
+
+ /*
+ * PcieCfgRegPl100 - Gen3 Control
+ *
+ * turn off PcieCfgRegPl100.Gen3ZRxDcNonCompl
+ * turn on PcieCfgRegPl100.EqEieosCnt (erratum)
+ * Everything else zero.
+ */
+ reg32 = PCIE_CFG_REG_PL100_EQ_EIEOS_CNT_SMASK;
+ pci_write_config_dword(dd->pcidev, PCIE_CFG_REG_PL100, reg32);
+
+ /*
+ * PcieCfgRegPl101 - Gen3 EQ FS and LF
+ * PcieCfgRegPl102 - Gen3 EQ Presets to Coefficients Mapping
+ * PcieCfgRegPl103 - Gen3 EQ Preset Index
+ * PcieCfgRegPl105 - Gen3 EQ Status
+ *
+ * Give initial EQ settings.
+ */
+ if (dd->pcidev->device == PCI_DEVICE_ID_INTEL0) { /* discrete */
+ /* 1000mV, FS=24, LF = 8 */
+ fs = 24;
+ lf = 8;
+ div = 3;
+ eq = discrete_preliminary_eq;
+ default_pset = DEFAULT_DISCRETE_PSET;
+ } else {
+ /* 400mV, FS=29, LF = 9 */
+ fs = 29;
+ lf = 9;
+ div = 1;
+ eq = integrated_preliminary_eq;
+ default_pset = DEFAULT_MCP_PSET;
+ }
+ pci_write_config_dword(dd->pcidev, PCIE_CFG_REG_PL101,
+ (fs << PCIE_CFG_REG_PL101_GEN3_EQ_LOCAL_FS_SHIFT)
+ | (lf << PCIE_CFG_REG_PL101_GEN3_EQ_LOCAL_LF_SHIFT));
+ ret = load_eq_table(dd, eq, fs, div);
+ if (ret)
+ goto done;
+
+ /*
+ * PcieCfgRegPl106 - Gen3 EQ Control
+ *
+ * Set Gen3EqPsetReqVec, leave other fields 0.
+ */
+ if (pcie_pset == UNSET_PSET)
+ pcie_pset = default_pset;
+ if (pcie_pset > 10) { /* valid range is 0-10, inclusive */
+ dd_dev_err(dd, "%s: Invalid Eq Pset %u, setting to %d\n",
+ __func__, pcie_pset, default_pset);
+ pcie_pset = default_pset;
+ }
+ dd_dev_info(dd, "%s: using EQ Pset %u\n", __func__, pcie_pset);
+ pci_write_config_dword(dd->pcidev, PCIE_CFG_REG_PL106,
+ ((1 << pcie_pset)
+ << PCIE_CFG_REG_PL106_GEN3_EQ_PSET_REQ_VEC_SHIFT)
+ | PCIE_CFG_REG_PL106_GEN3_EQ_EVAL2MS_DISABLE_SMASK
+ | PCIE_CFG_REG_PL106_GEN3_EQ_PHASE23_EXIT_MODE_SMASK);
+
+ /*
+ * step 5b: Do post firmware download steps via SBus
+ */
+ dd_dev_info(dd, "%s: doing pcie post steps\n", __func__);
+ pcie_post_steps(dd);
+
+ /*
+ * step 5c: Program gasket interrupts
+ */
+ /* set the Rx Bit Rate to REFCLK ratio */
+ write_gasket_interrupt(dd, 0, 0x0006, 0x0050);
+ /* disable pCal for PCIe Gen3 RX equalization */
+ write_gasket_interrupt(dd, 1, 0x0026, 0x5b01);
+ /*
+ * Enable iCal for PCIe Gen3 RX equalization, and set which
+ * evaluation of RX_EQ_EVAL will launch the iCal procedure.
+ */
+ write_gasket_interrupt(dd, 2, 0x0026, 0x5202);
+ /* terminate list */
+ write_gasket_interrupt(dd, 3, 0x0000, 0x0000);
+
+ /*
+ * step 5d: program XMT margin
+ * Right now, leave the default alone. To change, do a
+ * read-modify-write of:
+ * CcePcieCtrl.XmtMargin
+ * CcePcieCtrl.XmitMarginOverwriteEnable
+ */
+
+ /* step 5e: disable active state power management (ASPM) */
+ dd_dev_info(dd, "%s: clearing ASPM\n", __func__);
+ pcie_capability_read_word(dd->pcidev, PCI_EXP_LNKCTL, &lnkctl);
+ lnkctl &= ~PCI_EXP_LNKCTL_ASPMC;
+ pcie_capability_write_word(dd->pcidev, PCI_EXP_LNKCTL, lnkctl);
+
+ /*
+ * step 5f: clear DirectSpeedChange
+ * PcieCfgRegPl67.DirectSpeedChange must be zero to prevent the
+ * change in the speed target from starting before we are ready.
+ * This field defaults to 0 and we are not changing it, so nothing
+ * needs to be done.
+ */
+
+ /* step 5g: Set target link speed */
+ /*
+ * Set target link speed to be target on both device and parent.
+ * On setting the parent: Some system BIOSs "helpfully" set the
+ * parent target speed to Gen2 to match the ASIC's initial speed.
+ * We can set the target Gen3 because we have already checked
+ * that it is Gen3 capable earlier.
+ */
+ dd_dev_info(dd, "%s: setting parent target link speed\n", __func__);
+ parent = dd->pcidev->bus->self;
+ pcie_capability_read_word(parent, PCI_EXP_LNKCTL2, &lnkctl2);
+ dd_dev_info(dd, "%s: ..old link control2: 0x%x\n", __func__,
+ (u32)lnkctl2);
+ /* only write to parent if target is not as high as ours */
+ if ((lnkctl2 & LNKCTL2_TARGET_LINK_SPEED_MASK) < target_vector) {
+ lnkctl2 &= ~LNKCTL2_TARGET_LINK_SPEED_MASK;
+ lnkctl2 |= target_vector;
+ dd_dev_info(dd, "%s: ..new link control2: 0x%x\n", __func__,
+ (u32)lnkctl2);
+ pcie_capability_write_word(parent, PCI_EXP_LNKCTL2, lnkctl2);
+ } else {
+ dd_dev_info(dd, "%s: ..target speed is OK\n", __func__);
+ }
+
+ dd_dev_info(dd, "%s: setting target link speed\n", __func__);
+ pcie_capability_read_word(dd->pcidev, PCI_EXP_LNKCTL2, &lnkctl2);
+ dd_dev_info(dd, "%s: ..old link control2: 0x%x\n", __func__,
+ (u32)lnkctl2);
+ lnkctl2 &= ~LNKCTL2_TARGET_LINK_SPEED_MASK;
+ lnkctl2 |= target_vector;
+ dd_dev_info(dd, "%s: ..new link control2: 0x%x\n", __func__,
+ (u32)lnkctl2);
+ pcie_capability_write_word(dd->pcidev, PCI_EXP_LNKCTL2, lnkctl2);
+
+ /* step 5h: arm gasket logic */
+ /* hold DC in reset across the SBR */
+ write_csr(dd, CCE_DC_CTRL, CCE_DC_CTRL_DC_RESET_SMASK);
+ (void) read_csr(dd, CCE_DC_CTRL); /* DC reset hold */
+ /* save firmware control across the SBR */
+ fw_ctrl = read_csr(dd, MISC_CFG_FW_CTRL);
+
+ dd_dev_info(dd, "%s: arming gasket logic\n", __func__);
+ arm_gasket_logic(dd);
+
+ /*
+ * step 6: quiesce PCIe link
+ * The chip has already been reset, so there will be no traffic
+ * from the chip. Linux has no easy way to enforce that it will
+ * not try to access the device, so we just need to hope it doesn't
+ * do it while we are doing the reset.
+ */
+
+ /*
+ * step 7: initiate the secondary bus reset (SBR)
+ * step 8: hardware brings the links back up
+ * step 9: wait for link speed transition to be complete
+ */
+ dd_dev_info(dd, "%s: calling trigger_sbr\n", __func__);
+ ret = trigger_sbr(dd);
+ if (ret)
+ goto done;
+
+ /* step 10: decide what to do next */
+
+ /* check if we can read PCI space */
+ ret = pci_read_config_word(dd->pcidev, PCI_VENDOR_ID, &vendor);
+ if (ret) {
+ dd_dev_info(dd,
+ "%s: read of VendorID failed after SBR, err %d\n",
+ __func__, ret);
+ return_error = 1;
+ goto done;
+ }
+ if (vendor == 0xffff) {
+ dd_dev_info(dd, "%s: VendorID is all 1s after SBR\n", __func__);
+ return_error = 1;
+ ret = -EIO;
+ goto done;
+ }
+
+ /* restore PCI space registers we know were reset */
+ dd_dev_info(dd, "%s: calling restore_pci_variables\n", __func__);
+ restore_pci_variables(dd);
+ /* restore firmware control */
+ write_csr(dd, MISC_CFG_FW_CTRL, fw_ctrl);
+
+ /*
+ * Check the gasket block status.
+ *
+ * This is the first CSR read after the SBR. If the read returns
+ * all 1s (fails), the link did not make it back.
+ *
+ * Once we're sure we can read and write, clear the DC reset after
+ * the SBR. Then check for any per-lane errors. Then look over
+ * the status.
+ */
+ reg = read_csr(dd, ASIC_PCIE_SD_HOST_STATUS);
+ dd_dev_info(dd, "%s: gasket block status: 0x%llx\n", __func__, reg);
+ if (reg == ~0ull) { /* PCIe read failed/timeout */
+ dd_dev_err(dd, "SBR failed - unable to read from device\n");
+ return_error = 1;
+ ret = -ENOSYS;
+ goto done;
+ }
+
+ /* clear the DC reset */
+ write_csr(dd, CCE_DC_CTRL, 0);
+ /* Set the LED off */
+ if (is_a0(dd))
+ setextled(dd, 0);
+
+ /* check for any per-lane errors */
+ pci_read_config_dword(dd->pcidev, PCIE_CFG_SPCIE2, ®32);
+ dd_dev_info(dd, "%s: per-lane errors: 0x%x\n", __func__, reg32);
+
+ /* extract status, look for our HFI */
+ status = (reg >> ASIC_PCIE_SD_HOST_STATUS_FW_DNLD_STS_SHIFT)
+ & ASIC_PCIE_SD_HOST_STATUS_FW_DNLD_STS_MASK;
+ if ((status & (1 << dd->hfi1_id)) == 0) {
+ dd_dev_err(dd,
+ "%s: gasket status 0x%x, expecting 0x%x\n",
+ __func__, status, 1 << dd->hfi1_id);
+ ret = -EIO;
+ goto done;
+ }
+
+ /* extract error */
+ err = (reg >> ASIC_PCIE_SD_HOST_STATUS_FW_DNLD_ERR_SHIFT)
+ & ASIC_PCIE_SD_HOST_STATUS_FW_DNLD_ERR_MASK;
+ if (err) {
+ dd_dev_err(dd, "%s: gasket error %d\n", __func__, err);
+ ret = -EIO;
+ goto done;
+ }
+
+ /* update our link information cache */
+ update_lbus_info(dd);
+ dd_dev_info(dd, "%s: new speed and width: %s\n", __func__,
+ dd->lbus_info);
+
+ if (dd->lbus_speed != target_speed) { /* not target */
+ /* maybe retry */
+ do_retry = retry_count < pcie_retry;
+ dd_dev_err(dd, "PCIe link speed did not switch to Gen%d%s\n",
+ pcie_target, do_retry ? ", retrying" : "");
+ retry_count++;
+ if (do_retry) {
+ msleep(100); /* allow time to settle */
+ goto retry;
+ }
+ ret = -EIO;
+ }
+
+done:
+ if (therm) {
+ write_csr(dd, ASIC_CFG_THERM_POLL_EN, 0x1);
+ msleep(100);
+ dd_dev_info(dd, "%s: Re-enable therm polling\n",
+ __func__);
+ }
+ release_hw_mutex(dd);
+done_no_mutex:
+ /* return no error if it is OK to be at current speed */
+ if (ret && !return_error) {
+ dd_dev_err(dd, "Proceeding at current speed PCIe speed\n");
+ ret = 0;
+ }
+
+ dd_dev_info(dd, "%s: done\n", __func__);
+ return ret;
+}
diff --git a/drivers/staging/rdma/hfi1/pio.c b/drivers/staging/rdma/hfi1/pio.c
new file mode 100644
index 0000000..9991814
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/pio.c
@@ -0,0 +1,1771 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/delay.h>
+#include "hfi.h"
+#include "qp.h"
+#include "trace.h"
+
+#define SC_CTXT_PACKET_EGRESS_TIMEOUT 350 /* in chip cycles */
+
+#define SC(name) SEND_CTXT_##name
+/*
+ * Send Context functions
+ */
+static void sc_wait_for_packet_egress(struct send_context *sc, int pause);
+
+/*
+ * Set the CM reset bit and wait for it to clear. Use the provided
+ * sendctrl register. This routine has no locking.
+ */
+void __cm_reset(struct hfi1_devdata *dd, u64 sendctrl)
+{
+ write_csr(dd, SEND_CTRL, sendctrl | SEND_CTRL_CM_RESET_SMASK);
+ while (1) {
+ udelay(1);
+ sendctrl = read_csr(dd, SEND_CTRL);
+ if ((sendctrl & SEND_CTRL_CM_RESET_SMASK) == 0)
+ break;
+ }
+}
+
+/* defined in header release 48 and higher */
+#ifndef SEND_CTRL_UNSUPPORTED_VL_SHIFT
+#define SEND_CTRL_UNSUPPORTED_VL_SHIFT 3
+#define SEND_CTRL_UNSUPPORTED_VL_MASK 0xffull
+#define SEND_CTRL_UNSUPPORTED_VL_SMASK (SEND_CTRL_UNSUPPORTED_VL_MASK \
+ << SEND_CTRL_UNSUPPORTED_VL_SHIFT)
+#endif
+
+/* global control of PIO send */
+void pio_send_control(struct hfi1_devdata *dd, int op)
+{
+ u64 reg, mask;
+ unsigned long flags;
+ int write = 1; /* write sendctrl back */
+ int flush = 0; /* re-read sendctrl to make sure it is flushed */
+
+ spin_lock_irqsave(&dd->sendctrl_lock, flags);
+
+ reg = read_csr(dd, SEND_CTRL);
+ switch (op) {
+ case PSC_GLOBAL_ENABLE:
+ reg |= SEND_CTRL_SEND_ENABLE_SMASK;
+ /* Fall through */
+ case PSC_DATA_VL_ENABLE:
+ /* Disallow sending on VLs not enabled */
+ mask = (((~0ull)<<num_vls) & SEND_CTRL_UNSUPPORTED_VL_MASK)<<
+ SEND_CTRL_UNSUPPORTED_VL_SHIFT;
+ reg = (reg & ~SEND_CTRL_UNSUPPORTED_VL_SMASK) | mask;
+ break;
+ case PSC_GLOBAL_DISABLE:
+ reg &= ~SEND_CTRL_SEND_ENABLE_SMASK;
+ break;
+ case PSC_GLOBAL_VLARB_ENABLE:
+ reg |= SEND_CTRL_VL_ARBITER_ENABLE_SMASK;
+ break;
+ case PSC_GLOBAL_VLARB_DISABLE:
+ reg &= ~SEND_CTRL_VL_ARBITER_ENABLE_SMASK;
+ break;
+ case PSC_CM_RESET:
+ __cm_reset(dd, reg);
+ write = 0; /* CSR already written (and flushed) */
+ break;
+ case PSC_DATA_VL_DISABLE:
+ reg |= SEND_CTRL_UNSUPPORTED_VL_SMASK;
+ flush = 1;
+ break;
+ default:
+ dd_dev_err(dd, "%s: invalid control %d\n", __func__, op);
+ break;
+ }
+
+ if (write) {
+ write_csr(dd, SEND_CTRL, reg);
+ if (flush)
+ (void) read_csr(dd, SEND_CTRL); /* flush write */
+ }
+
+ spin_unlock_irqrestore(&dd->sendctrl_lock, flags);
+}
+
+/* number of send context memory pools */
+#define NUM_SC_POOLS 2
+
+/* Send Context Size (SCS) wildcards */
+#define SCS_POOL_0 -1
+#define SCS_POOL_1 -2
+/* Send Context Count (SCC) wildcards */
+#define SCC_PER_VL -1
+#define SCC_PER_CPU -2
+
+#define SCC_PER_KRCVQ -3
+#define SCC_ACK_CREDITS 32
+
+#define PIO_WAIT_BATCH_SIZE 5
+
+/* default send context sizes */
+static struct sc_config_sizes sc_config_sizes[SC_MAX] = {
+ [SC_KERNEL] = { .size = SCS_POOL_0, /* even divide, pool 0 */
+ .count = SCC_PER_VL },/* one per NUMA */
+ [SC_ACK] = { .size = SCC_ACK_CREDITS,
+ .count = SCC_PER_KRCVQ },
+ [SC_USER] = { .size = SCS_POOL_0, /* even divide, pool 0 */
+ .count = SCC_PER_CPU }, /* one per CPU */
+
+};
+
+/* send context memory pool configuration */
+struct mem_pool_config {
+ int centipercent; /* % of memory, in 100ths of 1% */
+ int absolute_blocks; /* absolute block count */
+};
+
+/* default memory pool configuration: 100% in pool 0 */
+static struct mem_pool_config sc_mem_pool_config[NUM_SC_POOLS] = {
+ /* centi%, abs blocks */
+ { 10000, -1 }, /* pool 0 */
+ { 0, -1 }, /* pool 1 */
+};
+
+/* memory pool information, used when calculating final sizes */
+struct mem_pool_info {
+ int centipercent; /* 100th of 1% of memory to use, -1 if blocks
+ already set */
+ int count; /* count of contexts in the pool */
+ int blocks; /* block size of the pool */
+ int size; /* context size, in blocks */
+};
+
+/*
+ * Convert a pool wildcard to a valid pool index. The wildcards
+ * start at -1 and increase negatively. Map them as:
+ * -1 => 0
+ * -2 => 1
+ * etc.
+ *
+ * Return -1 on non-wildcard input, otherwise convert to a pool number.
+ */
+static int wildcard_to_pool(int wc)
+{
+ if (wc >= 0)
+ return -1; /* non-wildcard */
+ return -wc - 1;
+}
+
+static const char *sc_type_names[SC_MAX] = {
+ "kernel",
+ "ack",
+ "user"
+};
+
+static const char *sc_type_name(int index)
+{
+ if (index < 0 || index >= SC_MAX)
+ return "unknown";
+ return sc_type_names[index];
+}
+
+/*
+ * Read the send context memory pool configuration and send context
+ * size configuration. Replace any wildcards and come up with final
+ * counts and sizes for the send context types.
+ */
+int init_sc_pools_and_sizes(struct hfi1_devdata *dd)
+{
+ struct mem_pool_info mem_pool_info[NUM_SC_POOLS] = { { 0 } };
+ int total_blocks = (dd->chip_pio_mem_size / PIO_BLOCK_SIZE) - 1;
+ int total_contexts = 0;
+ int fixed_blocks;
+ int pool_blocks;
+ int used_blocks;
+ int cp_total; /* centipercent total */
+ int ab_total; /* absolute block total */
+ int extra;
+ int i;
+
+ /*
+ * Step 0:
+ * - copy the centipercents/absolute sizes from the pool config
+ * - sanity check these values
+ * - add up centipercents, then later check for full value
+ * - add up absolute blocks, then later check for over-commit
+ */
+ cp_total = 0;
+ ab_total = 0;
+ for (i = 0; i < NUM_SC_POOLS; i++) {
+ int cp = sc_mem_pool_config[i].centipercent;
+ int ab = sc_mem_pool_config[i].absolute_blocks;
+
+ /*
+ * A negative value is "unused" or "invalid". Both *can*
+ * be valid, but centipercent wins, so check that first
+ */
+ if (cp >= 0) { /* centipercent valid */
+ cp_total += cp;
+ } else if (ab >= 0) { /* absolute blocks valid */
+ ab_total += ab;
+ } else { /* neither valid */
+ dd_dev_err(
+ dd,
+ "Send context memory pool %d: both the block count and centipercent are invalid\n",
+ i);
+ return -EINVAL;
+ }
+
+ mem_pool_info[i].centipercent = cp;
+ mem_pool_info[i].blocks = ab;
+ }
+
+ /* do not use both % and absolute blocks for different pools */
+ if (cp_total != 0 && ab_total != 0) {
+ dd_dev_err(
+ dd,
+ "All send context memory pools must be described as either centipercent or blocks, no mixing between pools\n");
+ return -EINVAL;
+ }
+
+ /* if any percentages are present, they must add up to 100% x 100 */
+ if (cp_total != 0 && cp_total != 10000) {
+ dd_dev_err(
+ dd,
+ "Send context memory pool centipercent is %d, expecting 10000\n",
+ cp_total);
+ return -EINVAL;
+ }
+
+ /* the absolute pool total cannot be more than the mem total */
+ if (ab_total > total_blocks) {
+ dd_dev_err(
+ dd,
+ "Send context memory pool absolute block count %d is larger than the memory size %d\n",
+ ab_total, total_blocks);
+ return -EINVAL;
+ }
+
+ /*
+ * Step 2:
+ * - copy from the context size config
+ * - replace context type wildcard counts with real values
+ * - add up non-memory pool block sizes
+ * - add up memory pool user counts
+ */
+ fixed_blocks = 0;
+ for (i = 0; i < SC_MAX; i++) {
+ int count = sc_config_sizes[i].count;
+ int size = sc_config_sizes[i].size;
+ int pool;
+
+ /*
+ * Sanity check count: Either a positive value or
+ * one of the expected wildcards is valid. The positive
+ * value is checked later when we compare against total
+ * memory available.
+ */
+ if (i == SC_ACK) {
+ count = dd->n_krcv_queues;
+ } else if (i == SC_KERNEL) {
+ count = num_vls + 1 /* VL15 */;
+ } else if (count == SCC_PER_CPU) {
+ count = dd->num_rcv_contexts - dd->n_krcv_queues;
+ } else if (count < 0) {
+ dd_dev_err(
+ dd,
+ "%s send context invalid count wildcard %d\n",
+ sc_type_name(i), count);
+ return -EINVAL;
+ }
+ if (total_contexts + count > dd->chip_send_contexts)
+ count = dd->chip_send_contexts - total_contexts;
+
+ total_contexts += count;
+
+ /*
+ * Sanity check pool: The conversion will return a pool
+ * number or -1 if a fixed (non-negative) value. The fixed
+ * value is checked later when we compare against
+ * total memory available.
+ */
+ pool = wildcard_to_pool(size);
+ if (pool == -1) { /* non-wildcard */
+ fixed_blocks += size * count;
+ } else if (pool < NUM_SC_POOLS) { /* valid wildcard */
+ mem_pool_info[pool].count += count;
+ } else { /* invalid wildcard */
+ dd_dev_err(
+ dd,
+ "%s send context invalid pool wildcard %d\n",
+ sc_type_name(i), size);
+ return -EINVAL;
+ }
+
+ dd->sc_sizes[i].count = count;
+ dd->sc_sizes[i].size = size;
+ }
+ if (fixed_blocks > total_blocks) {
+ dd_dev_err(
+ dd,
+ "Send context fixed block count, %u, larger than total block count %u\n",
+ fixed_blocks, total_blocks);
+ return -EINVAL;
+ }
+
+ /* step 3: calculate the blocks in the pools, and pool context sizes */
+ pool_blocks = total_blocks - fixed_blocks;
+ if (ab_total > pool_blocks) {
+ dd_dev_err(
+ dd,
+ "Send context fixed pool sizes, %u, larger than pool block count %u\n",
+ ab_total, pool_blocks);
+ return -EINVAL;
+ }
+ /* subtract off the fixed pool blocks */
+ pool_blocks -= ab_total;
+
+ for (i = 0; i < NUM_SC_POOLS; i++) {
+ struct mem_pool_info *pi = &mem_pool_info[i];
+
+ /* % beats absolute blocks */
+ if (pi->centipercent >= 0)
+ pi->blocks = (pool_blocks * pi->centipercent) / 10000;
+
+ if (pi->blocks == 0 && pi->count != 0) {
+ dd_dev_err(
+ dd,
+ "Send context memory pool %d has %u contexts, but no blocks\n",
+ i, pi->count);
+ return -EINVAL;
+ }
+ if (pi->count == 0) {
+ /* warn about wasted blocks */
+ if (pi->blocks != 0)
+ dd_dev_err(
+ dd,
+ "Send context memory pool %d has %u blocks, but zero contexts\n",
+ i, pi->blocks);
+ pi->size = 0;
+ } else {
+ pi->size = pi->blocks / pi->count;
+ }
+ }
+
+ /* step 4: fill in the context type sizes from the pool sizes */
+ used_blocks = 0;
+ for (i = 0; i < SC_MAX; i++) {
+ if (dd->sc_sizes[i].size < 0) {
+ unsigned pool = wildcard_to_pool(dd->sc_sizes[i].size);
+
+ WARN_ON_ONCE(pool >= NUM_SC_POOLS);
+ dd->sc_sizes[i].size = mem_pool_info[pool].size;
+ }
+ /* make sure we are not larger than what is allowed by the HW */
+#define PIO_MAX_BLOCKS 1024
+ if (dd->sc_sizes[i].size > PIO_MAX_BLOCKS)
+ dd->sc_sizes[i].size = PIO_MAX_BLOCKS;
+
+ /* calculate our total usage */
+ used_blocks += dd->sc_sizes[i].size * dd->sc_sizes[i].count;
+ }
+ extra = total_blocks - used_blocks;
+ if (extra != 0)
+ dd_dev_info(dd, "unused send context blocks: %d\n", extra);
+
+ return total_contexts;
+}
+
+int init_send_contexts(struct hfi1_devdata *dd)
+{
+ u16 base;
+ int ret, i, j, context;
+
+ ret = init_credit_return(dd);
+ if (ret)
+ return ret;
+
+ dd->hw_to_sw = kmalloc_array(TXE_NUM_CONTEXTS, sizeof(u8),
+ GFP_KERNEL);
+ dd->send_contexts = kcalloc(dd->num_send_contexts,
+ sizeof(struct send_context_info),
+ GFP_KERNEL);
+ if (!dd->send_contexts || !dd->hw_to_sw) {
+ dd_dev_err(dd, "Unable to allocate send context arrays\n");
+ kfree(dd->hw_to_sw);
+ kfree(dd->send_contexts);
+ free_credit_return(dd);
+ return -ENOMEM;
+ }
+
+ /* hardware context map starts with invalid send context indices */
+ for (i = 0; i < TXE_NUM_CONTEXTS; i++)
+ dd->hw_to_sw[i] = INVALID_SCI;
+
+ /*
+ * All send contexts have their credit sizes. Allocate credits
+ * for each context one after another from the global space.
+ */
+ context = 0;
+ base = 1;
+ for (i = 0; i < SC_MAX; i++) {
+ struct sc_config_sizes *scs = &dd->sc_sizes[i];
+
+ for (j = 0; j < scs->count; j++) {
+ struct send_context_info *sci =
+ &dd->send_contexts[context];
+ sci->type = i;
+ sci->base = base;
+ sci->credits = scs->size;
+
+ context++;
+ base += scs->size;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Allocate a software index and hardware context of the given type.
+ *
+ * Must be called with dd->sc_lock held.
+ */
+static int sc_hw_alloc(struct hfi1_devdata *dd, int type, u32 *sw_index,
+ u32 *hw_context)
+{
+ struct send_context_info *sci;
+ u32 index;
+ u32 context;
+
+ for (index = 0, sci = &dd->send_contexts[0];
+ index < dd->num_send_contexts; index++, sci++) {
+ if (sci->type == type && sci->allocated == 0) {
+ sci->allocated = 1;
+ /* use a 1:1 mapping, but make them non-equal */
+ context = dd->chip_send_contexts - index - 1;
+ dd->hw_to_sw[context] = index;
+ *sw_index = index;
+ *hw_context = context;
+ return 0; /* success */
+ }
+ }
+ dd_dev_err(dd, "Unable to locate a free type %d send context\n", type);
+ return -ENOSPC;
+}
+
+/*
+ * Free the send context given by its software index.
+ *
+ * Must be called with dd->sc_lock held.
+ */
+static void sc_hw_free(struct hfi1_devdata *dd, u32 sw_index, u32 hw_context)
+{
+ struct send_context_info *sci;
+
+ sci = &dd->send_contexts[sw_index];
+ if (!sci->allocated) {
+ dd_dev_err(dd, "%s: sw_index %u not allocated? hw_context %u\n",
+ __func__, sw_index, hw_context);
+ }
+ sci->allocated = 0;
+ dd->hw_to_sw[hw_context] = INVALID_SCI;
+}
+
+/* return the base context of a context in a group */
+static inline u32 group_context(u32 context, u32 group)
+{
+ return (context >> group) << group;
+}
+
+/* return the size of a group */
+static inline u32 group_size(u32 group)
+{
+ return 1 << group;
+}
+
+/*
+ * Obtain the credit return addresses, kernel virtual and physical, for the
+ * given sc.
+ *
+ * To understand this routine:
+ * o va and pa are arrays of struct credit_return. One for each physical
+ * send context, per NUMA.
+ * o Each send context always looks in its relative location in a struct
+ * credit_return for its credit return.
+ * o Each send context in a group must have its return address CSR programmed
+ * with the same value. Use the address of the first send context in the
+ * group.
+ */
+static void cr_group_addresses(struct send_context *sc, dma_addr_t *pa)
+{
+ u32 gc = group_context(sc->hw_context, sc->group);
+ u32 index = sc->hw_context & 0x7;
+
+ sc->hw_free = &sc->dd->cr_base[sc->node].va[gc].cr[index];
+ *pa = (unsigned long)
+ &((struct credit_return *)sc->dd->cr_base[sc->node].pa)[gc];
+}
+
+/*
+ * Work queue function triggered in error interrupt routine for
+ * kernel contexts.
+ */
+static void sc_halted(struct work_struct *work)
+{
+ struct send_context *sc;
+
+ sc = container_of(work, struct send_context, halt_work);
+ sc_restart(sc);
+}
+
+/*
+ * Calculate PIO block threshold for this send context using the given MTU.
+ * Trigger a return when one MTU plus optional header of credits remain.
+ *
+ * Parameter mtu is in bytes.
+ * Parameter hdrqentsize is in DWORDs.
+ *
+ * Return value is what to write into the CSR: trigger return when
+ * unreturned credits pass this count.
+ */
+u32 sc_mtu_to_threshold(struct send_context *sc, u32 mtu, u32 hdrqentsize)
+{
+ u32 release_credits;
+ u32 threshold;
+
+ /* add in the header size, then divide by the PIO block size */
+ mtu += hdrqentsize << 2;
+ release_credits = DIV_ROUND_UP(mtu, PIO_BLOCK_SIZE);
+
+ /* check against this context's credits */
+ if (sc->credits <= release_credits)
+ threshold = 1;
+ else
+ threshold = sc->credits - release_credits;
+
+ return threshold;
+}
+
+/*
+ * Calculate credit threshold in terms of percent of the allocated credits.
+ * Trigger when unreturned credits equal or exceed the percentage of the whole.
+ *
+ * Return value is what to write into the CSR: trigger return when
+ * unreturned credits pass this count.
+ */
+static u32 sc_percent_to_threshold(struct send_context *sc, u32 percent)
+{
+ return (sc->credits * percent) / 100;
+}
+
+/*
+ * Set the credit return threshold.
+ */
+void sc_set_cr_threshold(struct send_context *sc, u32 new_threshold)
+{
+ unsigned long flags;
+ u32 old_threshold;
+ int force_return = 0;
+
+ spin_lock_irqsave(&sc->credit_ctrl_lock, flags);
+
+ old_threshold = (sc->credit_ctrl >>
+ SC(CREDIT_CTRL_THRESHOLD_SHIFT))
+ & SC(CREDIT_CTRL_THRESHOLD_MASK);
+
+ if (new_threshold != old_threshold) {
+ sc->credit_ctrl =
+ (sc->credit_ctrl
+ & ~SC(CREDIT_CTRL_THRESHOLD_SMASK))
+ | ((new_threshold
+ & SC(CREDIT_CTRL_THRESHOLD_MASK))
+ << SC(CREDIT_CTRL_THRESHOLD_SHIFT));
+ write_kctxt_csr(sc->dd, sc->hw_context,
+ SC(CREDIT_CTRL), sc->credit_ctrl);
+
+ /* force a credit return on change to avoid a possible stall */
+ force_return = 1;
+ }
+
+ spin_unlock_irqrestore(&sc->credit_ctrl_lock, flags);
+
+ if (force_return)
+ sc_return_credits(sc);
+}
+
+/*
+ * set_pio_integrity
+ *
+ * Set the CHECK_ENABLE register for the send context 'sc'.
+ */
+void set_pio_integrity(struct send_context *sc)
+{
+ struct hfi1_devdata *dd = sc->dd;
+ u64 reg = 0;
+ u32 hw_context = sc->hw_context;
+ int type = sc->type;
+
+ /*
+ * No integrity checks if HFI1_CAP_NO_INTEGRITY is set, or if
+ * we're snooping.
+ */
+ if (likely(!HFI1_CAP_IS_KSET(NO_INTEGRITY)) &&
+ dd->hfi1_snoop.mode_flag != HFI1_PORT_SNOOP_MODE)
+ reg = hfi1_pkt_default_send_ctxt_mask(dd, type);
+
+ write_kctxt_csr(dd, hw_context, SC(CHECK_ENABLE), reg);
+}
+
+/*
+ * Allocate a NUMA relative send context structure of the given type along
+ * with a HW context.
+ */
+struct send_context *sc_alloc(struct hfi1_devdata *dd, int type,
+ uint hdrqentsize, int numa)
+{
+ struct send_context_info *sci;
+ struct send_context *sc;
+ dma_addr_t pa;
+ unsigned long flags;
+ u64 reg;
+ u32 thresh;
+ u32 sw_index;
+ u32 hw_context;
+ int ret;
+ u8 opval, opmask;
+
+ /* do not allocate while frozen */
+ if (dd->flags & HFI1_FROZEN)
+ return NULL;
+
+ sc = kzalloc_node(sizeof(struct send_context), GFP_KERNEL, numa);
+ if (!sc) {
+ dd_dev_err(dd, "Cannot allocate send context structure\n");
+ return NULL;
+ }
+
+ spin_lock_irqsave(&dd->sc_lock, flags);
+ ret = sc_hw_alloc(dd, type, &sw_index, &hw_context);
+ if (ret) {
+ spin_unlock_irqrestore(&dd->sc_lock, flags);
+ kfree(sc);
+ return NULL;
+ }
+
+ sci = &dd->send_contexts[sw_index];
+ sci->sc = sc;
+
+ sc->dd = dd;
+ sc->node = numa;
+ sc->type = type;
+ spin_lock_init(&sc->alloc_lock);
+ spin_lock_init(&sc->release_lock);
+ spin_lock_init(&sc->credit_ctrl_lock);
+ INIT_LIST_HEAD(&sc->piowait);
+ INIT_WORK(&sc->halt_work, sc_halted);
+ atomic_set(&sc->buffers_allocated, 0);
+ init_waitqueue_head(&sc->halt_wait);
+
+ /* grouping is always single context for now */
+ sc->group = 0;
+
+ sc->sw_index = sw_index;
+ sc->hw_context = hw_context;
+ cr_group_addresses(sc, &pa);
+ sc->credits = sci->credits;
+
+/* PIO Send Memory Address details */
+#define PIO_ADDR_CONTEXT_MASK 0xfful
+#define PIO_ADDR_CONTEXT_SHIFT 16
+ sc->base_addr = dd->piobase + ((hw_context & PIO_ADDR_CONTEXT_MASK)
+ << PIO_ADDR_CONTEXT_SHIFT);
+
+ /* set base and credits */
+ reg = ((sci->credits & SC(CTRL_CTXT_DEPTH_MASK))
+ << SC(CTRL_CTXT_DEPTH_SHIFT))
+ | ((sci->base & SC(CTRL_CTXT_BASE_MASK))
+ << SC(CTRL_CTXT_BASE_SHIFT));
+ write_kctxt_csr(dd, hw_context, SC(CTRL), reg);
+
+ set_pio_integrity(sc);
+
+ /* unmask all errors */
+ write_kctxt_csr(dd, hw_context, SC(ERR_MASK), (u64)-1);
+
+ /* set the default partition key */
+ write_kctxt_csr(dd, hw_context, SC(CHECK_PARTITION_KEY),
+ (DEFAULT_PKEY &
+ SC(CHECK_PARTITION_KEY_VALUE_MASK))
+ << SC(CHECK_PARTITION_KEY_VALUE_SHIFT));
+
+ /* per context type checks */
+ if (type == SC_USER) {
+ opval = USER_OPCODE_CHECK_VAL;
+ opmask = USER_OPCODE_CHECK_MASK;
+ } else {
+ opval = OPCODE_CHECK_VAL_DISABLED;
+ opmask = OPCODE_CHECK_MASK_DISABLED;
+ }
+
+ /* set the send context check opcode mask and value */
+ write_kctxt_csr(dd, hw_context, SC(CHECK_OPCODE),
+ ((u64)opmask << SC(CHECK_OPCODE_MASK_SHIFT)) |
+ ((u64)opval << SC(CHECK_OPCODE_VALUE_SHIFT)));
+
+ /* set up credit return */
+ reg = pa & SC(CREDIT_RETURN_ADDR_ADDRESS_SMASK);
+ write_kctxt_csr(dd, hw_context, SC(CREDIT_RETURN_ADDR), reg);
+
+ /*
+ * Calculate the initial credit return threshold.
+ *
+ * For Ack contexts, set a threshold for half the credits.
+ * For User contexts use the given percentage. This has been
+ * sanitized on driver start-up.
+ * For Kernel contexts, use the default MTU plus a header.
+ */
+ if (type == SC_ACK) {
+ thresh = sc_percent_to_threshold(sc, 50);
+ } else if (type == SC_USER) {
+ thresh = sc_percent_to_threshold(sc,
+ user_credit_return_threshold);
+ } else { /* kernel */
+ thresh = sc_mtu_to_threshold(sc, hfi1_max_mtu, hdrqentsize);
+ }
+ reg = thresh << SC(CREDIT_CTRL_THRESHOLD_SHIFT);
+ /* add in early return */
+ if (type == SC_USER && HFI1_CAP_IS_USET(EARLY_CREDIT_RETURN))
+ reg |= SC(CREDIT_CTRL_EARLY_RETURN_SMASK);
+ else if (HFI1_CAP_IS_KSET(EARLY_CREDIT_RETURN)) /* kernel, ack */
+ reg |= SC(CREDIT_CTRL_EARLY_RETURN_SMASK);
+
+ /* set up write-through credit_ctrl */
+ sc->credit_ctrl = reg;
+ write_kctxt_csr(dd, hw_context, SC(CREDIT_CTRL), reg);
+
+ /* User send contexts should not allow sending on VL15 */
+ if (type == SC_USER) {
+ reg = 1ULL << 15;
+ write_kctxt_csr(dd, hw_context, SC(CHECK_VL), reg);
+ }
+
+ spin_unlock_irqrestore(&dd->sc_lock, flags);
+
+ /*
+ * Allocate shadow ring to track outstanding PIO buffers _after_
+ * unlocking. We don't know the size until the lock is held and
+ * we can't allocate while the lock is held. No one is using
+ * the context yet, so allocate it now.
+ *
+ * User contexts do not get a shadow ring.
+ */
+ if (type != SC_USER) {
+ /*
+ * Size the shadow ring 1 larger than the number of credits
+ * so head == tail can mean empty.
+ */
+ sc->sr_size = sci->credits + 1;
+ sc->sr = kzalloc_node(sizeof(union pio_shadow_ring) *
+ sc->sr_size, GFP_KERNEL, numa);
+ if (!sc->sr) {
+ dd_dev_err(dd,
+ "Cannot allocate send context shadow ring structure\n");
+ sc_free(sc);
+ return NULL;
+ }
+ }
+
+ dd_dev_info(dd,
+ "Send context %u(%u) %s group %u credits %u credit_ctrl 0x%llx threshold %u\n",
+ sw_index,
+ hw_context,
+ sc_type_name(type),
+ sc->group,
+ sc->credits,
+ sc->credit_ctrl,
+ thresh);
+
+ return sc;
+}
+
+/* free a per-NUMA send context structure */
+void sc_free(struct send_context *sc)
+{
+ struct hfi1_devdata *dd;
+ unsigned long flags;
+ u32 sw_index;
+ u32 hw_context;
+
+ if (!sc)
+ return;
+
+ sc->flags |= SCF_IN_FREE; /* ensure no restarts */
+ dd = sc->dd;
+ if (!list_empty(&sc->piowait))
+ dd_dev_err(dd, "piowait list not empty!\n");
+ sw_index = sc->sw_index;
+ hw_context = sc->hw_context;
+ sc_disable(sc); /* make sure the HW is disabled */
+ flush_work(&sc->halt_work);
+
+ spin_lock_irqsave(&dd->sc_lock, flags);
+ dd->send_contexts[sw_index].sc = NULL;
+
+ /* clear/disable all registers set in sc_alloc */
+ write_kctxt_csr(dd, hw_context, SC(CTRL), 0);
+ write_kctxt_csr(dd, hw_context, SC(CHECK_ENABLE), 0);
+ write_kctxt_csr(dd, hw_context, SC(ERR_MASK), 0);
+ write_kctxt_csr(dd, hw_context, SC(CHECK_PARTITION_KEY), 0);
+ write_kctxt_csr(dd, hw_context, SC(CHECK_OPCODE), 0);
+ write_kctxt_csr(dd, hw_context, SC(CREDIT_RETURN_ADDR), 0);
+ write_kctxt_csr(dd, hw_context, SC(CREDIT_CTRL), 0);
+
+ /* release the index and context for re-use */
+ sc_hw_free(dd, sw_index, hw_context);
+ spin_unlock_irqrestore(&dd->sc_lock, flags);
+
+ kfree(sc->sr);
+ kfree(sc);
+}
+
+/* disable the context */
+void sc_disable(struct send_context *sc)
+{
+ u64 reg;
+ unsigned long flags;
+ struct pio_buf *pbuf;
+
+ if (!sc)
+ return;
+
+ /* do all steps, even if already disabled */
+ spin_lock_irqsave(&sc->alloc_lock, flags);
+ reg = read_kctxt_csr(sc->dd, sc->hw_context, SC(CTRL));
+ reg &= ~SC(CTRL_CTXT_ENABLE_SMASK);
+ sc->flags &= ~SCF_ENABLED;
+ sc_wait_for_packet_egress(sc, 1);
+ write_kctxt_csr(sc->dd, sc->hw_context, SC(CTRL), reg);
+ spin_unlock_irqrestore(&sc->alloc_lock, flags);
+
+ /*
+ * Flush any waiters. Once the context is disabled,
+ * credit return interrupts are stopped (although there
+ * could be one in-process when the context is disabled).
+ * Wait one microsecond for any lingering interrupts, then
+ * proceed with the flush.
+ */
+ udelay(1);
+ spin_lock_irqsave(&sc->release_lock, flags);
+ if (sc->sr) { /* this context has a shadow ring */
+ while (sc->sr_tail != sc->sr_head) {
+ pbuf = &sc->sr[sc->sr_tail].pbuf;
+ if (pbuf->cb)
+ (*pbuf->cb)(pbuf->arg, PRC_SC_DISABLE);
+ sc->sr_tail++;
+ if (sc->sr_tail >= sc->sr_size)
+ sc->sr_tail = 0;
+ }
+ }
+ spin_unlock_irqrestore(&sc->release_lock, flags);
+}
+
+/* return SendEgressCtxtStatus.PacketOccupancy */
+#define packet_occupancy(r) \
+ (((r) & SEND_EGRESS_CTXT_STATUS_CTXT_EGRESS_PACKET_OCCUPANCY_SMASK)\
+ >> SEND_EGRESS_CTXT_STATUS_CTXT_EGRESS_PACKET_OCCUPANCY_SHIFT)
+
+/* is egress halted on the context? */
+#define egress_halted(r) \
+ ((r) & SEND_EGRESS_CTXT_STATUS_CTXT_EGRESS_HALT_STATUS_SMASK)
+
+/* wait for packet egress, optionally pause for credit return */
+static void sc_wait_for_packet_egress(struct send_context *sc, int pause)
+{
+ struct hfi1_devdata *dd = sc->dd;
+ u64 reg;
+ u32 loop = 0;
+
+ while (1) {
+ reg = read_csr(dd, sc->hw_context * 8 +
+ SEND_EGRESS_CTXT_STATUS);
+ /* done if egress is stopped */
+ if (egress_halted(reg))
+ break;
+ reg = packet_occupancy(reg);
+ if (reg == 0)
+ break;
+ if (loop > 100) {
+ dd_dev_err(dd,
+ "%s: context %u(%u) timeout waiting for packets to egress, remaining count %u\n",
+ __func__, sc->sw_index,
+ sc->hw_context, (u32)reg);
+ break;
+ }
+ loop++;
+ udelay(1);
+ }
+
+ if (pause)
+ /* Add additional delay to ensure chip returns all credits */
+ pause_for_credit_return(dd);
+}
+
+void sc_wait(struct hfi1_devdata *dd)
+{
+ int i;
+
+ for (i = 0; i < dd->num_send_contexts; i++) {
+ struct send_context *sc = dd->send_contexts[i].sc;
+
+ if (!sc)
+ continue;
+ sc_wait_for_packet_egress(sc, 0);
+ }
+}
+
+/*
+ * Restart a context after it has been halted due to error.
+ *
+ * If the first step fails - wait for the halt to be asserted, return early.
+ * Otherwise complain about timeouts but keep going.
+ *
+ * It is expected that allocations (enabled flag bit) have been shut off
+ * already (only applies to kernel contexts).
+ */
+int sc_restart(struct send_context *sc)
+{
+ struct hfi1_devdata *dd = sc->dd;
+ u64 reg;
+ u32 loop;
+ int count;
+
+ /* bounce off if not halted, or being free'd */
+ if (!(sc->flags & SCF_HALTED) || (sc->flags & SCF_IN_FREE))
+ return -EINVAL;
+
+ dd_dev_info(dd, "restarting send context %u(%u)\n", sc->sw_index,
+ sc->hw_context);
+
+ /*
+ * Step 1: Wait for the context to actually halt.
+ *
+ * The error interrupt is asynchronous to actually setting halt
+ * on the context.
+ */
+ loop = 0;
+ while (1) {
+ reg = read_kctxt_csr(dd, sc->hw_context, SC(STATUS));
+ if (reg & SC(STATUS_CTXT_HALTED_SMASK))
+ break;
+ if (loop > 100) {
+ dd_dev_err(dd, "%s: context %u(%u) not halting, skipping\n",
+ __func__, sc->sw_index, sc->hw_context);
+ return -ETIME;
+ }
+ loop++;
+ udelay(1);
+ }
+
+ /*
+ * Step 2: Ensure no users are still trying to write to PIO.
+ *
+ * For kernel contexts, we have already turned off buffer allocation.
+ * Now wait for the buffer count to go to zero.
+ *
+ * For user contexts, the user handling code has cut off write access
+ * to the context's PIO pages before calling this routine and will
+ * restore write access after this routine returns.
+ */
+ if (sc->type != SC_USER) {
+ /* kernel context */
+ loop = 0;
+ while (1) {
+ count = atomic_read(&sc->buffers_allocated);
+ if (count == 0)
+ break;
+ if (loop > 100) {
+ dd_dev_err(dd,
+ "%s: context %u(%u) timeout waiting for PIO buffers to zero, remaining %d\n",
+ __func__, sc->sw_index,
+ sc->hw_context, count);
+ }
+ loop++;
+ udelay(1);
+ }
+ }
+
+ /*
+ * Step 3: Wait for all packets to egress.
+ * This is done while disabling the send context
+ *
+ * Step 4: Disable the context
+ *
+ * This is a superset of the halt. After the disable, the
+ * errors can be cleared.
+ */
+ sc_disable(sc);
+
+ /*
+ * Step 5: Enable the context
+ *
+ * This enable will clear the halted flag and per-send context
+ * error flags.
+ */
+ return sc_enable(sc);
+}
+
+/*
+ * PIO freeze processing. To be called after the TXE block is fully frozen.
+ * Go through all frozen send contexts and disable them. The contexts are
+ * already stopped by the freeze.
+ */
+void pio_freeze(struct hfi1_devdata *dd)
+{
+ struct send_context *sc;
+ int i;
+
+ for (i = 0; i < dd->num_send_contexts; i++) {
+ sc = dd->send_contexts[i].sc;
+ /*
+ * Don't disable unallocated, unfrozen, or user send contexts.
+ * User send contexts will be disabled when the process
+ * calls into the driver to reset its context.
+ */
+ if (!sc || !(sc->flags & SCF_FROZEN) || sc->type == SC_USER)
+ continue;
+
+ /* only need to disable, the context is already stopped */
+ sc_disable(sc);
+ }
+}
+
+/*
+ * Unfreeze PIO for kernel send contexts. The precondition for calling this
+ * is that all PIO send contexts have been disabled and the SPC freeze has
+ * been cleared. Now perform the last step and re-enable each kernel context.
+ * User (PSM) processing will occur when PSM calls into the kernel to
+ * acknowledge the freeze.
+ */
+void pio_kernel_unfreeze(struct hfi1_devdata *dd)
+{
+ struct send_context *sc;
+ int i;
+
+ for (i = 0; i < dd->num_send_contexts; i++) {
+ sc = dd->send_contexts[i].sc;
+ if (!sc || !(sc->flags & SCF_FROZEN) || sc->type == SC_USER)
+ continue;
+
+ sc_enable(sc); /* will clear the sc frozen flag */
+ }
+}
+
+/*
+ * Wait for the SendPioInitCtxt.PioInitInProgress bit to clear.
+ * Returns:
+ * -ETIMEDOUT - if we wait too long
+ * -EIO - if there was an error
+ */
+static int pio_init_wait_progress(struct hfi1_devdata *dd)
+{
+ u64 reg;
+ int max, count = 0;
+
+ /* max is the longest possible HW init time / delay */
+ max = (dd->icode == ICODE_FPGA_EMULATION) ? 120 : 5;
+ while (1) {
+ reg = read_csr(dd, SEND_PIO_INIT_CTXT);
+ if (!(reg & SEND_PIO_INIT_CTXT_PIO_INIT_IN_PROGRESS_SMASK))
+ break;
+ if (count >= max)
+ return -ETIMEDOUT;
+ udelay(5);
+ count++;
+ }
+
+ return reg & SEND_PIO_INIT_CTXT_PIO_INIT_ERR_SMASK ? -EIO : 0;
+}
+
+/*
+ * Reset all of the send contexts to their power-on state. Used
+ * only during manual init - no lock against sc_enable needed.
+ */
+void pio_reset_all(struct hfi1_devdata *dd)
+{
+ int ret;
+
+ /* make sure the init engine is not busy */
+ ret = pio_init_wait_progress(dd);
+ /* ignore any timeout */
+ if (ret == -EIO) {
+ /* clear the error */
+ write_csr(dd, SEND_PIO_ERR_CLEAR,
+ SEND_PIO_ERR_CLEAR_PIO_INIT_SM_IN_ERR_SMASK);
+ }
+
+ /* reset init all */
+ write_csr(dd, SEND_PIO_INIT_CTXT,
+ SEND_PIO_INIT_CTXT_PIO_ALL_CTXT_INIT_SMASK);
+ udelay(2);
+ ret = pio_init_wait_progress(dd);
+ if (ret < 0) {
+ dd_dev_err(dd,
+ "PIO send context init %s while initializing all PIO blocks\n",
+ ret == -ETIMEDOUT ? "is stuck" : "had an error");
+ }
+}
+
+/* enable the context */
+int sc_enable(struct send_context *sc)
+{
+ u64 sc_ctrl, reg, pio;
+ struct hfi1_devdata *dd;
+ unsigned long flags;
+ int ret = 0;
+
+ if (!sc)
+ return -EINVAL;
+ dd = sc->dd;
+
+ /*
+ * Obtain the allocator lock to guard against any allocation
+ * attempts (which should not happen prior to context being
+ * enabled). On the release/disable side we don't need to
+ * worry about locking since the releaser will not do anything
+ * if the context accounting values have not changed.
+ */
+ spin_lock_irqsave(&sc->alloc_lock, flags);
+ sc_ctrl = read_kctxt_csr(dd, sc->hw_context, SC(CTRL));
+ if ((sc_ctrl & SC(CTRL_CTXT_ENABLE_SMASK)))
+ goto unlock; /* already enabled */
+
+ /* IMPORTANT: only clear free and fill if transitioning 0 -> 1 */
+
+ *sc->hw_free = 0;
+ sc->free = 0;
+ sc->alloc_free = 0;
+ sc->fill = 0;
+ sc->sr_head = 0;
+ sc->sr_tail = 0;
+ sc->flags = 0;
+ atomic_set(&sc->buffers_allocated, 0);
+
+ /*
+ * Clear all per-context errors. Some of these will be set when
+ * we are re-enabling after a context halt. Now that the context
+ * is disabled, the halt will not clear until after the PIO init
+ * engine runs below.
+ */
+ reg = read_kctxt_csr(dd, sc->hw_context, SC(ERR_STATUS));
+ if (reg)
+ write_kctxt_csr(dd, sc->hw_context, SC(ERR_CLEAR),
+ reg);
+
+ /*
+ * The HW PIO initialization engine can handle only one init
+ * request at a time. Serialize access to each device's engine.
+ */
+ spin_lock(&dd->sc_init_lock);
+ /*
+ * Since access to this code block is serialized and
+ * each access waits for the initialization to complete
+ * before releasing the lock, the PIO initialization engine
+ * should not be in use, so we don't have to wait for the
+ * InProgress bit to go down.
+ */
+ pio = ((sc->hw_context & SEND_PIO_INIT_CTXT_PIO_CTXT_NUM_MASK) <<
+ SEND_PIO_INIT_CTXT_PIO_CTXT_NUM_SHIFT) |
+ SEND_PIO_INIT_CTXT_PIO_SINGLE_CTXT_INIT_SMASK;
+ write_csr(dd, SEND_PIO_INIT_CTXT, pio);
+ /*
+ * Wait until the engine is done. Give the chip the required time
+ * so, hopefully, we read the register just once.
+ */
+ udelay(2);
+ ret = pio_init_wait_progress(dd);
+ spin_unlock(&dd->sc_init_lock);
+ if (ret) {
+ dd_dev_err(dd,
+ "sctxt%u(%u): Context not enabled due to init failure %d\n",
+ sc->sw_index, sc->hw_context, ret);
+ goto unlock;
+ }
+
+ /*
+ * All is well. Enable the context.
+ */
+ sc_ctrl |= SC(CTRL_CTXT_ENABLE_SMASK);
+ write_kctxt_csr(dd, sc->hw_context, SC(CTRL), sc_ctrl);
+ /*
+ * Read SendCtxtCtrl to force the write out and prevent a timing
+ * hazard where a PIO write may reach the context before the enable.
+ */
+ read_kctxt_csr(dd, sc->hw_context, SC(CTRL));
+ sc->flags |= SCF_ENABLED;
+
+unlock:
+ spin_unlock_irqrestore(&sc->alloc_lock, flags);
+
+ return ret;
+}
+
+/* force a credit return on the context */
+void sc_return_credits(struct send_context *sc)
+{
+ if (!sc)
+ return;
+
+ /* a 0->1 transition schedules a credit return */
+ write_kctxt_csr(sc->dd, sc->hw_context, SC(CREDIT_FORCE),
+ SC(CREDIT_FORCE_FORCE_RETURN_SMASK));
+ /*
+ * Ensure that the write is flushed and the credit return is
+ * scheduled. We care more about the 0 -> 1 transition.
+ */
+ read_kctxt_csr(sc->dd, sc->hw_context, SC(CREDIT_FORCE));
+ /* set back to 0 for next time */
+ write_kctxt_csr(sc->dd, sc->hw_context, SC(CREDIT_FORCE), 0);
+}
+
+/* allow all in-flight packets to drain on the context */
+void sc_flush(struct send_context *sc)
+{
+ if (!sc)
+ return;
+
+ sc_wait_for_packet_egress(sc, 1);
+}
+
+/* drop all packets on the context, no waiting until they are sent */
+void sc_drop(struct send_context *sc)
+{
+ if (!sc)
+ return;
+
+ dd_dev_info(sc->dd, "%s: context %u(%u) - not implemented\n",
+ __func__, sc->sw_index, sc->hw_context);
+}
+
+/*
+ * Start the software reaction to a context halt or SPC freeze:
+ * - mark the context as halted or frozen
+ * - stop buffer allocations
+ *
+ * Called from the error interrupt. Other work is deferred until
+ * out of the interrupt.
+ */
+void sc_stop(struct send_context *sc, int flag)
+{
+ unsigned long flags;
+
+ /* mark the context */
+ sc->flags |= flag;
+
+ /* stop buffer allocations */
+ spin_lock_irqsave(&sc->alloc_lock, flags);
+ sc->flags &= ~SCF_ENABLED;
+ spin_unlock_irqrestore(&sc->alloc_lock, flags);
+ wake_up(&sc->halt_wait);
+}
+
+#define BLOCK_DWORDS (PIO_BLOCK_SIZE/sizeof(u32))
+#define dwords_to_blocks(x) DIV_ROUND_UP(x, BLOCK_DWORDS)
+
+/*
+ * The send context buffer "allocator".
+ *
+ * @sc: the PIO send context we are allocating from
+ * @len: length of whole packet - including PBC - in dwords
+ * @cb: optional callback to call when the buffer is finished sending
+ * @arg: argument for cb
+ *
+ * Return a pointer to a PIO buffer if successful, NULL if not enough room.
+ */
+struct pio_buf *sc_buffer_alloc(struct send_context *sc, u32 dw_len,
+ pio_release_cb cb, void *arg)
+{
+ struct pio_buf *pbuf = NULL;
+ unsigned long flags;
+ unsigned long avail;
+ unsigned long blocks = dwords_to_blocks(dw_len);
+ unsigned long start_fill;
+ int trycount = 0;
+ u32 head, next;
+
+ spin_lock_irqsave(&sc->alloc_lock, flags);
+ if (!(sc->flags & SCF_ENABLED)) {
+ spin_unlock_irqrestore(&sc->alloc_lock, flags);
+ goto done;
+ }
+
+retry:
+ avail = (unsigned long)sc->credits - (sc->fill - sc->alloc_free);
+ if (blocks > avail) {
+ /* not enough room */
+ if (unlikely(trycount)) { /* already tried to get more room */
+ spin_unlock_irqrestore(&sc->alloc_lock, flags);
+ goto done;
+ }
+ /* copy from receiver cache line and recalculate */
+ sc->alloc_free = ACCESS_ONCE(sc->free);
+ avail =
+ (unsigned long)sc->credits -
+ (sc->fill - sc->alloc_free);
+ if (blocks > avail) {
+ /* still no room, actively update */
+ spin_unlock_irqrestore(&sc->alloc_lock, flags);
+ sc_release_update(sc);
+ spin_lock_irqsave(&sc->alloc_lock, flags);
+ sc->alloc_free = ACCESS_ONCE(sc->free);
+ trycount++;
+ goto retry;
+ }
+ }
+
+ /* there is enough room */
+
+ atomic_inc(&sc->buffers_allocated);
+
+ /* read this once */
+ head = sc->sr_head;
+
+ /* "allocate" the buffer */
+ start_fill = sc->fill;
+ sc->fill += blocks;
+
+ /*
+ * Fill the parts that the releaser looks at before moving the head.
+ * The only necessary piece is the sent_at field. The credits
+ * we have just allocated cannot have been returned yet, so the
+ * cb and arg will not be looked at for a "while". Put them
+ * on this side of the memory barrier anyway.
+ */
+ pbuf = &sc->sr[head].pbuf;
+ pbuf->sent_at = sc->fill;
+ pbuf->cb = cb;
+ pbuf->arg = arg;
+ pbuf->sc = sc; /* could be filled in at sc->sr init time */
+ /* make sure this is in memory before updating the head */
+
+ /* calculate next head index, do not store */
+ next = head + 1;
+ if (next >= sc->sr_size)
+ next = 0;
+ /* update the head - must be last! - the releaser can look at fields
+ in pbuf once we move the head */
+ smp_wmb();
+ sc->sr_head = next;
+ spin_unlock_irqrestore(&sc->alloc_lock, flags);
+
+ /* finish filling in the buffer outside the lock */
+ pbuf->start = sc->base_addr + ((start_fill % sc->credits)
+ * PIO_BLOCK_SIZE);
+ pbuf->size = sc->credits * PIO_BLOCK_SIZE;
+ pbuf->end = sc->base_addr + pbuf->size;
+ pbuf->block_count = blocks;
+ pbuf->qw_written = 0;
+ pbuf->carry_bytes = 0;
+ pbuf->carry.val64 = 0;
+done:
+ return pbuf;
+}
+
+/*
+ * There are at least two entities that can turn on credit return
+ * interrupts and they can overlap. Avoid problems by implementing
+ * a count scheme that is enforced by a lock. The lock is needed because
+ * the count and CSR write must be paired.
+ */
+
+/*
+ * Start credit return interrupts. This is managed by a count. If already
+ * on, just increment the count.
+ */
+void sc_add_credit_return_intr(struct send_context *sc)
+{
+ unsigned long flags;
+
+ /* lock must surround both the count change and the CSR update */
+ spin_lock_irqsave(&sc->credit_ctrl_lock, flags);
+ if (sc->credit_intr_count == 0) {
+ sc->credit_ctrl |= SC(CREDIT_CTRL_CREDIT_INTR_SMASK);
+ write_kctxt_csr(sc->dd, sc->hw_context,
+ SC(CREDIT_CTRL), sc->credit_ctrl);
+ }
+ sc->credit_intr_count++;
+ spin_unlock_irqrestore(&sc->credit_ctrl_lock, flags);
+}
+
+/*
+ * Stop credit return interrupts. This is managed by a count. Decrement the
+ * count, if the last user, then turn the credit interrupts off.
+ */
+void sc_del_credit_return_intr(struct send_context *sc)
+{
+ unsigned long flags;
+
+ WARN_ON(sc->credit_intr_count == 0);
+
+ /* lock must surround both the count change and the CSR update */
+ spin_lock_irqsave(&sc->credit_ctrl_lock, flags);
+ sc->credit_intr_count--;
+ if (sc->credit_intr_count == 0) {
+ sc->credit_ctrl &= ~SC(CREDIT_CTRL_CREDIT_INTR_SMASK);
+ write_kctxt_csr(sc->dd, sc->hw_context,
+ SC(CREDIT_CTRL), sc->credit_ctrl);
+ }
+ spin_unlock_irqrestore(&sc->credit_ctrl_lock, flags);
+}
+
+/*
+ * The caller must be careful when calling this. All needint calls
+ * must be paired with !needint.
+ */
+void hfi1_sc_wantpiobuf_intr(struct send_context *sc, u32 needint)
+{
+ if (needint)
+ sc_add_credit_return_intr(sc);
+ else
+ sc_del_credit_return_intr(sc);
+ trace_hfi1_wantpiointr(sc, needint, sc->credit_ctrl);
+ if (needint) {
+ mmiowb();
+ sc_return_credits(sc);
+ }
+}
+
+/**
+ * sc_piobufavail - callback when a PIO buffer is available
+ * @sc: the send context
+ *
+ * This is called from the interrupt handler when a PIO buffer is
+ * available after hfi1_verbs_send() returned an error that no buffers were
+ * available. Disable the interrupt if there are no more QPs waiting.
+ */
+static void sc_piobufavail(struct send_context *sc)
+{
+ struct hfi1_devdata *dd = sc->dd;
+ struct hfi1_ibdev *dev = &dd->verbs_dev;
+ struct list_head *list;
+ struct hfi1_qp *qps[PIO_WAIT_BATCH_SIZE];
+ struct hfi1_qp *qp;
+ unsigned long flags;
+ unsigned i, n = 0;
+
+ if (dd->send_contexts[sc->sw_index].type != SC_KERNEL)
+ return;
+ list = &sc->piowait;
+ /*
+ * Note: checking that the piowait list is empty and clearing
+ * the buffer available interrupt needs to be atomic or we
+ * could end up with QPs on the wait list with the interrupt
+ * disabled.
+ */
+ write_seqlock_irqsave(&dev->iowait_lock, flags);
+ while (!list_empty(list)) {
+ struct iowait *wait;
+
+ if (n == ARRAY_SIZE(qps))
+ goto full;
+ wait = list_first_entry(list, struct iowait, list);
+ qp = container_of(wait, struct hfi1_qp, s_iowait);
+ list_del_init(&qp->s_iowait.list);
+ /* refcount held until actual wake up */
+ qps[n++] = qp;
+ }
+ /*
+ * Counting: only call wantpiobuf_intr() if there were waiters and they
+ * are now all gone.
+ */
+ if (n)
+ hfi1_sc_wantpiobuf_intr(sc, 0);
+full:
+ write_sequnlock_irqrestore(&dev->iowait_lock, flags);
+
+ for (i = 0; i < n; i++)
+ hfi1_qp_wakeup(qps[i], HFI1_S_WAIT_PIO);
+}
+
+/* translate a send credit update to a bit code of reasons */
+static inline int fill_code(u64 hw_free)
+{
+ int code = 0;
+
+ if (hw_free & CR_STATUS_SMASK)
+ code |= PRC_STATUS_ERR;
+ if (hw_free & CR_CREDIT_RETURN_DUE_TO_PBC_SMASK)
+ code |= PRC_PBC;
+ if (hw_free & CR_CREDIT_RETURN_DUE_TO_THRESHOLD_SMASK)
+ code |= PRC_THRESHOLD;
+ if (hw_free & CR_CREDIT_RETURN_DUE_TO_ERR_SMASK)
+ code |= PRC_FILL_ERR;
+ if (hw_free & CR_CREDIT_RETURN_DUE_TO_FORCE_SMASK)
+ code |= PRC_SC_DISABLE;
+ return code;
+}
+
+/* use the jiffies compare to get the wrap right */
+#define sent_before(a, b) time_before(a, b) /* a < b */
+
+/*
+ * The send context buffer "releaser".
+ */
+void sc_release_update(struct send_context *sc)
+{
+ struct pio_buf *pbuf;
+ u64 hw_free;
+ u32 head, tail;
+ unsigned long old_free;
+ unsigned long extra;
+ unsigned long flags;
+ int code;
+
+ if (!sc)
+ return;
+
+ spin_lock_irqsave(&sc->release_lock, flags);
+ /* update free */
+ hw_free = le64_to_cpu(*sc->hw_free); /* volatile read */
+ old_free = sc->free;
+ extra = (((hw_free & CR_COUNTER_SMASK) >> CR_COUNTER_SHIFT)
+ - (old_free & CR_COUNTER_MASK))
+ & CR_COUNTER_MASK;
+ sc->free = old_free + extra;
+ trace_hfi1_piofree(sc, extra);
+
+ /* call sent buffer callbacks */
+ code = -1; /* code not yet set */
+ head = ACCESS_ONCE(sc->sr_head); /* snapshot the head */
+ tail = sc->sr_tail;
+ while (head != tail) {
+ pbuf = &sc->sr[tail].pbuf;
+
+ if (sent_before(sc->free, pbuf->sent_at)) {
+ /* not sent yet */
+ break;
+ }
+ if (pbuf->cb) {
+ if (code < 0) /* fill in code on first user */
+ code = fill_code(hw_free);
+ (*pbuf->cb)(pbuf->arg, code);
+ }
+
+ tail++;
+ if (tail >= sc->sr_size)
+ tail = 0;
+ }
+ /* update tail, in case we moved it */
+ sc->sr_tail = tail;
+ spin_unlock_irqrestore(&sc->release_lock, flags);
+ sc_piobufavail(sc);
+}
+
+/*
+ * Send context group releaser. Argument is the send context that caused
+ * the interrupt. Called from the send context interrupt handler.
+ *
+ * Call release on all contexts in the group.
+ *
+ * This routine takes the sc_lock without an irqsave because it is only
+ * called from an interrupt handler. Adjust if that changes.
+ */
+void sc_group_release_update(struct hfi1_devdata *dd, u32 hw_context)
+{
+ struct send_context *sc;
+ u32 sw_index;
+ u32 gc, gc_end;
+
+ spin_lock(&dd->sc_lock);
+ sw_index = dd->hw_to_sw[hw_context];
+ if (unlikely(sw_index >= dd->num_send_contexts)) {
+ dd_dev_err(dd, "%s: invalid hw (%u) to sw (%u) mapping\n",
+ __func__, hw_context, sw_index);
+ goto done;
+ }
+ sc = dd->send_contexts[sw_index].sc;
+ if (unlikely(!sc))
+ goto done;
+
+ gc = group_context(hw_context, sc->group);
+ gc_end = gc + group_size(sc->group);
+ for (; gc < gc_end; gc++) {
+ sw_index = dd->hw_to_sw[gc];
+ if (unlikely(sw_index >= dd->num_send_contexts)) {
+ dd_dev_err(dd,
+ "%s: invalid hw (%u) to sw (%u) mapping\n",
+ __func__, hw_context, sw_index);
+ continue;
+ }
+ sc_release_update(dd->send_contexts[sw_index].sc);
+ }
+done:
+ spin_unlock(&dd->sc_lock);
+}
+
+int init_pervl_scs(struct hfi1_devdata *dd)
+{
+ int i;
+ u64 mask, all_vl_mask = (u64) 0x80ff; /* VLs 0-7, 15 */
+ u32 ctxt;
+
+ dd->vld[15].sc = sc_alloc(dd, SC_KERNEL,
+ dd->rcd[0]->rcvhdrqentsize, dd->node);
+ if (!dd->vld[15].sc)
+ goto nomem;
+ hfi1_init_ctxt(dd->vld[15].sc);
+ dd->vld[15].mtu = enum_to_mtu(OPA_MTU_2048);
+ for (i = 0; i < num_vls; i++) {
+ /*
+ * Since this function does not deal with a specific
+ * receive context but we need the RcvHdrQ entry size,
+ * use the size from rcd[0]. It is guaranteed to be
+ * valid at this point and will remain the same for all
+ * receive contexts.
+ */
+ dd->vld[i].sc = sc_alloc(dd, SC_KERNEL,
+ dd->rcd[0]->rcvhdrqentsize, dd->node);
+ if (!dd->vld[i].sc)
+ goto nomem;
+
+ hfi1_init_ctxt(dd->vld[i].sc);
+
+ /* non VL15 start with the max MTU */
+ dd->vld[i].mtu = hfi1_max_mtu;
+ }
+ sc_enable(dd->vld[15].sc);
+ ctxt = dd->vld[15].sc->hw_context;
+ mask = all_vl_mask & ~(1LL << 15);
+ write_kctxt_csr(dd, ctxt, SC(CHECK_VL), mask);
+ dd_dev_info(dd,
+ "Using send context %u(%u) for VL15\n",
+ dd->vld[15].sc->sw_index, ctxt);
+ for (i = 0; i < num_vls; i++) {
+ sc_enable(dd->vld[i].sc);
+ ctxt = dd->vld[i].sc->hw_context;
+ mask = all_vl_mask & ~(1LL << i);
+ write_kctxt_csr(dd, ctxt, SC(CHECK_VL), mask);
+ }
+ return 0;
+nomem:
+ sc_free(dd->vld[15].sc);
+ for (i = 0; i < num_vls; i++)
+ sc_free(dd->vld[i].sc);
+ return -ENOMEM;
+}
+
+int init_credit_return(struct hfi1_devdata *dd)
+{
+ int ret;
+ int num_numa;
+ int i;
+
+ num_numa = num_online_nodes();
+ /* enforce the expectation that the numas are compact */
+ for (i = 0; i < num_numa; i++) {
+ if (!node_online(i)) {
+ dd_dev_err(dd, "NUMA nodes are not compact\n");
+ ret = -EINVAL;
+ goto done;
+ }
+ }
+
+ dd->cr_base = kcalloc(
+ num_numa,
+ sizeof(struct credit_return_base),
+ GFP_KERNEL);
+ if (!dd->cr_base) {
+ dd_dev_err(dd, "Unable to allocate credit return base\n");
+ ret = -ENOMEM;
+ goto done;
+ }
+ for (i = 0; i < num_numa; i++) {
+ int bytes = TXE_NUM_CONTEXTS * sizeof(struct credit_return);
+
+ set_dev_node(&dd->pcidev->dev, i);
+ dd->cr_base[i].va = dma_zalloc_coherent(
+ &dd->pcidev->dev,
+ bytes,
+ &dd->cr_base[i].pa,
+ GFP_KERNEL);
+ if (dd->cr_base[i].va == NULL) {
+ set_dev_node(&dd->pcidev->dev, dd->node);
+ dd_dev_err(dd,
+ "Unable to allocate credit return DMA range for NUMA %d\n",
+ i);
+ ret = -ENOMEM;
+ goto done;
+ }
+ }
+ set_dev_node(&dd->pcidev->dev, dd->node);
+
+ ret = 0;
+done:
+ return ret;
+}
+
+void free_credit_return(struct hfi1_devdata *dd)
+{
+ int num_numa;
+ int i;
+
+ if (!dd->cr_base)
+ return;
+
+ num_numa = num_online_nodes();
+ for (i = 0; i < num_numa; i++) {
+ if (dd->cr_base[i].va) {
+ dma_free_coherent(&dd->pcidev->dev,
+ TXE_NUM_CONTEXTS
+ * sizeof(struct credit_return),
+ dd->cr_base[i].va,
+ dd->cr_base[i].pa);
+ }
+ }
+ kfree(dd->cr_base);
+ dd->cr_base = NULL;
+}
diff --git a/drivers/staging/rdma/hfi1/pio.h b/drivers/staging/rdma/hfi1/pio.h
new file mode 100644
index 0000000..0bb885c
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/pio.h
@@ -0,0 +1,224 @@
+#ifndef _PIO_H
+#define _PIO_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+
+/* send context types */
+#define SC_KERNEL 0
+#define SC_ACK 1
+#define SC_USER 2
+#define SC_MAX 3
+
+/* invalid send context index */
+#define INVALID_SCI 0xff
+
+/* PIO buffer release callback function */
+typedef void (*pio_release_cb)(void *arg, int code);
+
+/* PIO release codes - in bits, as there could more than one that apply */
+#define PRC_OK 0 /* no known error */
+#define PRC_STATUS_ERR 0x01 /* credit return due to status error */
+#define PRC_PBC 0x02 /* credit return due to PBC */
+#define PRC_THRESHOLD 0x04 /* credit return due to threshold */
+#define PRC_FILL_ERR 0x08 /* credit return due fill error */
+#define PRC_FORCE 0x10 /* credit return due credit force */
+#define PRC_SC_DISABLE 0x20 /* clean-up after a context disable */
+
+/* byte helper */
+union mix {
+ u64 val64;
+ u32 val32[2];
+ u8 val8[8];
+};
+
+/* an allocated PIO buffer */
+struct pio_buf {
+ struct send_context *sc;/* back pointer to owning send context */
+ pio_release_cb cb; /* called when the buffer is released */
+ void *arg; /* argument for cb */
+ void __iomem *start; /* buffer start address */
+ void __iomem *end; /* context end address */
+ unsigned long size; /* context size, in bytes */
+ unsigned long sent_at; /* buffer is sent when <= free */
+ u32 block_count; /* size of buffer, in blocks */
+ u32 qw_written; /* QW written so far */
+ u32 carry_bytes; /* number of valid bytes in carry */
+ union mix carry; /* pending unwritten bytes */
+};
+
+/* cache line aligned pio buffer array */
+union pio_shadow_ring {
+ struct pio_buf pbuf;
+ u64 unused[16]; /* cache line spacer */
+} ____cacheline_aligned;
+
+/* per-NUMA send context */
+struct send_context {
+ /* read-only after init */
+ struct hfi1_devdata *dd; /* device */
+ void __iomem *base_addr; /* start of PIO memory */
+ union pio_shadow_ring *sr; /* shadow ring */
+ volatile __le64 *hw_free; /* HW free counter */
+ struct work_struct halt_work; /* halted context work queue entry */
+ unsigned long flags; /* flags */
+ int node; /* context home node */
+ int type; /* context type */
+ u32 sw_index; /* software index number */
+ u32 hw_context; /* hardware context number */
+ u32 credits; /* number of blocks in context */
+ u32 sr_size; /* size of the shadow ring */
+ u32 group; /* credit return group */
+ /* allocator fields */
+ spinlock_t alloc_lock ____cacheline_aligned_in_smp;
+ unsigned long fill; /* official alloc count */
+ unsigned long alloc_free; /* copy of free (less cache thrash) */
+ u32 sr_head; /* shadow ring head */
+ /* releaser fields */
+ spinlock_t release_lock ____cacheline_aligned_in_smp;
+ unsigned long free; /* official free count */
+ u32 sr_tail; /* shadow ring tail */
+ /* list for PIO waiters */
+ struct list_head piowait ____cacheline_aligned_in_smp;
+ spinlock_t credit_ctrl_lock ____cacheline_aligned_in_smp;
+ u64 credit_ctrl; /* cache for credit control */
+ u32 credit_intr_count; /* count of credit intr users */
+ atomic_t buffers_allocated; /* count of buffers allocated */
+ wait_queue_head_t halt_wait; /* wait until kernel sees interrupt */
+};
+
+/* send context flags */
+#define SCF_ENABLED 0x01
+#define SCF_IN_FREE 0x02
+#define SCF_HALTED 0x04
+#define SCF_FROZEN 0x08
+
+struct send_context_info {
+ struct send_context *sc; /* allocated working context */
+ u16 allocated; /* has this been allocated? */
+ u16 type; /* context type */
+ u16 base; /* base in PIO array */
+ u16 credits; /* size in PIO array */
+};
+
+/* DMA credit return, index is always (context & 0x7) */
+struct credit_return {
+ volatile __le64 cr[8];
+};
+
+/* NUMA indexed credit return array */
+struct credit_return_base {
+ struct credit_return *va;
+ dma_addr_t pa;
+};
+
+/* send context configuration sizes (one per type) */
+struct sc_config_sizes {
+ short int size;
+ short int count;
+};
+
+/* send context functions */
+int init_credit_return(struct hfi1_devdata *dd);
+void free_credit_return(struct hfi1_devdata *dd);
+int init_sc_pools_and_sizes(struct hfi1_devdata *dd);
+int init_send_contexts(struct hfi1_devdata *dd);
+int init_credit_return(struct hfi1_devdata *dd);
+int init_pervl_scs(struct hfi1_devdata *dd);
+struct send_context *sc_alloc(struct hfi1_devdata *dd, int type,
+ uint hdrqentsize, int numa);
+void sc_free(struct send_context *sc);
+int sc_enable(struct send_context *sc);
+void sc_disable(struct send_context *sc);
+int sc_restart(struct send_context *sc);
+void sc_return_credits(struct send_context *sc);
+void sc_flush(struct send_context *sc);
+void sc_drop(struct send_context *sc);
+void sc_stop(struct send_context *sc, int bit);
+struct pio_buf *sc_buffer_alloc(struct send_context *sc, u32 dw_len,
+ pio_release_cb cb, void *arg);
+void sc_release_update(struct send_context *sc);
+void sc_return_credits(struct send_context *sc);
+void sc_group_release_update(struct hfi1_devdata *dd, u32 hw_context);
+void sc_add_credit_return_intr(struct send_context *sc);
+void sc_del_credit_return_intr(struct send_context *sc);
+void sc_set_cr_threshold(struct send_context *sc, u32 new_threshold);
+u32 sc_mtu_to_threshold(struct send_context *sc, u32 mtu, u32 hdrqentsize);
+void hfi1_sc_wantpiobuf_intr(struct send_context *sc, u32 needint);
+void sc_wait(struct hfi1_devdata *dd);
+void set_pio_integrity(struct send_context *sc);
+
+/* support functions */
+void pio_reset_all(struct hfi1_devdata *dd);
+void pio_freeze(struct hfi1_devdata *dd);
+void pio_kernel_unfreeze(struct hfi1_devdata *dd);
+
+/* global PIO send control operations */
+#define PSC_GLOBAL_ENABLE 0
+#define PSC_GLOBAL_DISABLE 1
+#define PSC_GLOBAL_VLARB_ENABLE 2
+#define PSC_GLOBAL_VLARB_DISABLE 3
+#define PSC_CM_RESET 4
+#define PSC_DATA_VL_ENABLE 5
+#define PSC_DATA_VL_DISABLE 6
+
+void __cm_reset(struct hfi1_devdata *dd, u64 sendctrl);
+void pio_send_control(struct hfi1_devdata *dd, int op);
+
+
+/* PIO copy routines */
+void pio_copy(struct hfi1_devdata *dd, struct pio_buf *pbuf, u64 pbc,
+ const void *from, size_t count);
+void seg_pio_copy_start(struct pio_buf *pbuf, u64 pbc,
+ const void *from, size_t nbytes);
+void seg_pio_copy_mid(struct pio_buf *pbuf, const void *from, size_t nbytes);
+void seg_pio_copy_end(struct pio_buf *pbuf);
+
+#endif /* _PIO_H */
diff --git a/drivers/staging/rdma/hfi1/pio_copy.c b/drivers/staging/rdma/hfi1/pio_copy.c
new file mode 100644
index 0000000..8972bbc
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/pio_copy.c
@@ -0,0 +1,858 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "hfi.h"
+
+/* additive distance between non-SOP and SOP space */
+#define SOP_DISTANCE (TXE_PIO_SIZE / 2)
+#define PIO_BLOCK_MASK (PIO_BLOCK_SIZE-1)
+/* number of QUADWORDs in a block */
+#define PIO_BLOCK_QWS (PIO_BLOCK_SIZE/sizeof(u64))
+
+/**
+ * pio_copy - copy data block to MMIO space
+ * @pbuf: a number of blocks allocated within a PIO send context
+ * @pbc: PBC to send
+ * @from: source, must be 8 byte aligned
+ * @count: number of DWORD (32-bit) quantities to copy from source
+ *
+ * Copy data from source to PIO Send Buffer memory, 8 bytes at a time.
+ * Must always write full BLOCK_SIZE bytes blocks. The first block must
+ * be written to the corresponding SOP=1 address.
+ *
+ * Known:
+ * o pbuf->start always starts on a block boundary
+ * o pbuf can wrap only at a block boundary
+ */
+void pio_copy(struct hfi1_devdata *dd, struct pio_buf *pbuf, u64 pbc,
+ const void *from, size_t count)
+{
+ void __iomem *dest = pbuf->start + SOP_DISTANCE;
+ void __iomem *send = dest + PIO_BLOCK_SIZE;
+ void __iomem *dend; /* 8-byte data end */
+
+ /* write the PBC */
+ writeq(pbc, dest);
+ dest += sizeof(u64);
+
+ /* calculate where the QWORD data ends - in SOP=1 space */
+ dend = dest + ((count>>1) * sizeof(u64));
+
+ if (dend < send) {
+ /* all QWORD data is within the SOP block, does *not*
+ reach the end of the SOP block */
+
+ while (dest < dend) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+ /*
+ * No boundary checks are needed here:
+ * 0. We're not on the SOP block boundary
+ * 1. The possible DWORD dangle will still be within
+ * the SOP block
+ * 2. We cannot wrap except on a block boundary.
+ */
+ } else {
+ /* QWORD data extends _to_ or beyond the SOP block */
+
+ /* write 8-byte SOP chunk data */
+ while (dest < send) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+ /* drop out of the SOP range */
+ dest -= SOP_DISTANCE;
+ dend -= SOP_DISTANCE;
+
+ /*
+ * If the wrap comes before or matches the data end,
+ * copy until until the wrap, then wrap.
+ *
+ * If the data ends at the end of the SOP above and
+ * the buffer wraps, then pbuf->end == dend == dest
+ * and nothing will get written, but we will wrap in
+ * case there is a dangling DWORD.
+ */
+ if (pbuf->end <= dend) {
+ while (dest < pbuf->end) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+
+ dest -= pbuf->size;
+ dend -= pbuf->size;
+ }
+
+ /* write 8-byte non-SOP, non-wrap chunk data */
+ while (dest < dend) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+ }
+ /* at this point we have wrapped if we are going to wrap */
+
+ /* write dangling u32, if any */
+ if (count & 1) {
+ union mix val;
+
+ val.val64 = 0;
+ val.val32[0] = *(u32 *)from;
+ writeq(val.val64, dest);
+ dest += sizeof(u64);
+ }
+ /* fill in rest of block, no need to check pbuf->end
+ as we only wrap on a block boundary */
+ while (((unsigned long)dest & PIO_BLOCK_MASK) != 0) {
+ writeq(0, dest);
+ dest += sizeof(u64);
+ }
+
+ /* finished with this buffer */
+ atomic_dec(&pbuf->sc->buffers_allocated);
+}
+
+/* USE_SHIFTS is faster in user-space tests on a Xeon X5570 @ 2.93GHz */
+#define USE_SHIFTS 1
+#ifdef USE_SHIFTS
+/*
+ * Handle carry bytes using shifts and masks.
+ *
+ * NOTE: the value the unused portion of carry is expected to always be zero.
+ */
+
+/*
+ * "zero" shift - bit shift used to zero out upper bytes. Input is
+ * the count of LSB bytes to preserve.
+ */
+#define zshift(x) (8 * (8-(x)))
+
+/*
+ * "merge" shift - bit shift used to merge with carry bytes. Input is
+ * the LSB byte count to move beyond.
+ */
+#define mshift(x) (8 * (x))
+
+/*
+ * Read nbytes bytes from "from" and return them in the LSB bytes
+ * of pbuf->carry. Other bytes are zeroed. Any previous value
+ * pbuf->carry is lost.
+ *
+ * NOTES:
+ * o do not read from from if nbytes is zero
+ * o from may _not_ be u64 aligned
+ * o nbytes must not span a QW boundary
+ */
+static inline void read_low_bytes(struct pio_buf *pbuf, const void *from,
+ unsigned int nbytes)
+{
+ unsigned long off;
+
+ if (nbytes == 0) {
+ pbuf->carry.val64 = 0;
+ } else {
+ /* align our pointer */
+ off = (unsigned long)from & 0x7;
+ from = (void *)((unsigned long)from & ~0x7l);
+ pbuf->carry.val64 = ((*(u64 *)from)
+ << zshift(nbytes + off))/* zero upper bytes */
+ >> zshift(nbytes); /* place at bottom */
+ }
+ pbuf->carry_bytes = nbytes;
+}
+
+/*
+ * Read nbytes bytes from "from" and put them at the next significant bytes
+ * of pbuf->carry. Unused bytes are zeroed. It is expected that the extra
+ * read does not overfill carry.
+ *
+ * NOTES:
+ * o from may _not_ be u64 aligned
+ * o nbytes may span a QW boundary
+ */
+static inline void read_extra_bytes(struct pio_buf *pbuf,
+ const void *from, unsigned int nbytes)
+{
+ unsigned long off = (unsigned long)from & 0x7;
+ unsigned int room, xbytes;
+
+ /* align our pointer */
+ from = (void *)((unsigned long)from & ~0x7l);
+
+ /* check count first - don't read anything if count is zero */
+ while (nbytes) {
+ /* find the number of bytes in this u64 */
+ room = 8 - off; /* this u64 has room for this many bytes */
+ xbytes = nbytes > room ? room : nbytes;
+
+ /*
+ * shift down to zero lower bytes, shift up to zero upper
+ * bytes, shift back down to move into place
+ */
+ pbuf->carry.val64 |= (((*(u64 *)from)
+ >> mshift(off))
+ << zshift(xbytes))
+ >> zshift(xbytes+pbuf->carry_bytes);
+ off = 0;
+ pbuf->carry_bytes += xbytes;
+ nbytes -= xbytes;
+ from += sizeof(u64);
+ }
+}
+
+/*
+ * Zero extra bytes from the end of pbuf->carry.
+ *
+ * NOTES:
+ * o zbytes <= old_bytes
+ */
+static inline void zero_extra_bytes(struct pio_buf *pbuf, unsigned int zbytes)
+{
+ unsigned int remaining;
+
+ if (zbytes == 0) /* nothing to do */
+ return;
+
+ remaining = pbuf->carry_bytes - zbytes; /* remaining bytes */
+
+ /* NOTE: zshift only guaranteed to work if remaining != 0 */
+ if (remaining)
+ pbuf->carry.val64 = (pbuf->carry.val64 << zshift(remaining))
+ >> zshift(remaining);
+ else
+ pbuf->carry.val64 = 0;
+ pbuf->carry_bytes = remaining;
+}
+
+/*
+ * Write a quad word using parts of pbuf->carry and the next 8 bytes of src.
+ * Put the unused part of the next 8 bytes of src into the LSB bytes of
+ * pbuf->carry with the upper bytes zeroed..
+ *
+ * NOTES:
+ * o result must keep unused bytes zeroed
+ * o src must be u64 aligned
+ */
+static inline void merge_write8(
+ struct pio_buf *pbuf,
+ void __iomem *dest,
+ const void *src)
+{
+ u64 new, temp;
+
+ new = *(u64 *)src;
+ temp = pbuf->carry.val64 | (new << mshift(pbuf->carry_bytes));
+ writeq(temp, dest);
+ pbuf->carry.val64 = new >> zshift(pbuf->carry_bytes);
+}
+
+/*
+ * Write a quad word using all bytes of carry.
+ */
+static inline void carry8_write8(union mix carry, void __iomem *dest)
+{
+ writeq(carry.val64, dest);
+}
+
+/*
+ * Write a quad word using all the valid bytes of carry. If carry
+ * has zero valid bytes, nothing is written.
+ * Returns 0 on nothing written, non-zero on quad word written.
+ */
+static inline int carry_write8(struct pio_buf *pbuf, void __iomem *dest)
+{
+ if (pbuf->carry_bytes) {
+ /* unused bytes are always kept zeroed, so just write */
+ writeq(pbuf->carry.val64, dest);
+ return 1;
+ }
+
+ return 0;
+}
+
+#else /* USE_SHIFTS */
+/*
+ * Handle carry bytes using byte copies.
+ *
+ * NOTE: the value the unused portion of carry is left uninitialized.
+ */
+
+/*
+ * Jump copy - no-loop copy for < 8 bytes.
+ */
+static inline void jcopy(u8 *dest, const u8 *src, u32 n)
+{
+ switch (n) {
+ case 7:
+ *dest++ = *src++;
+ case 6:
+ *dest++ = *src++;
+ case 5:
+ *dest++ = *src++;
+ case 4:
+ *dest++ = *src++;
+ case 3:
+ *dest++ = *src++;
+ case 2:
+ *dest++ = *src++;
+ case 1:
+ *dest++ = *src++;
+ }
+}
+
+/*
+ * Read nbytes from "from" and and place them in the low bytes
+ * of pbuf->carry. Other bytes are left as-is. Any previous
+ * value in pbuf->carry is lost.
+ *
+ * NOTES:
+ * o do not read from from if nbytes is zero
+ * o from may _not_ be u64 aligned.
+ */
+static inline void read_low_bytes(struct pio_buf *pbuf, const void *from,
+ unsigned int nbytes)
+{
+ jcopy(&pbuf->carry.val8[0], from, nbytes);
+ pbuf->carry_bytes = nbytes;
+}
+
+/*
+ * Read nbytes bytes from "from" and put them at the end of pbuf->carry.
+ * It is expected that the extra read does not overfill carry.
+ *
+ * NOTES:
+ * o from may _not_ be u64 aligned
+ * o nbytes may span a QW boundary
+ */
+static inline void read_extra_bytes(struct pio_buf *pbuf,
+ const void *from, unsigned int nbytes)
+{
+ jcopy(&pbuf->carry.val8[pbuf->carry_bytes], from, nbytes);
+ pbuf->carry_bytes += nbytes;
+}
+
+/*
+ * Zero extra bytes from the end of pbuf->carry.
+ *
+ * We do not care about the value of unused bytes in carry, so just
+ * reduce the byte count.
+ *
+ * NOTES:
+ * o zbytes <= old_bytes
+ */
+static inline void zero_extra_bytes(struct pio_buf *pbuf, unsigned int zbytes)
+{
+ pbuf->carry_bytes -= zbytes;
+}
+
+/*
+ * Write a quad word using parts of pbuf->carry and the next 8 bytes of src.
+ * Put the unused part of the next 8 bytes of src into the low bytes of
+ * pbuf->carry.
+ */
+static inline void merge_write8(
+ struct pio_buf *pbuf,
+ void *dest,
+ const void *src)
+{
+ u32 remainder = 8 - pbuf->carry_bytes;
+
+ jcopy(&pbuf->carry.val8[pbuf->carry_bytes], src, remainder);
+ writeq(pbuf->carry.val64, dest);
+ jcopy(&pbuf->carry.val8[0], src+remainder, pbuf->carry_bytes);
+}
+
+/*
+ * Write a quad word using all bytes of carry.
+ */
+static inline void carry8_write8(union mix carry, void *dest)
+{
+ writeq(carry.val64, dest);
+}
+
+/*
+ * Write a quad word using all the valid bytes of carry. If carry
+ * has zero valid bytes, nothing is written.
+ * Returns 0 on nothing written, non-zero on quad word written.
+ */
+static inline int carry_write8(struct pio_buf *pbuf, void *dest)
+{
+ if (pbuf->carry_bytes) {
+ u64 zero = 0;
+
+ jcopy(&pbuf->carry.val8[pbuf->carry_bytes], (u8 *)&zero,
+ 8 - pbuf->carry_bytes);
+ writeq(pbuf->carry.val64, dest);
+ return 1;
+ }
+
+ return 0;
+}
+#endif /* USE_SHIFTS */
+
+/*
+ * Segmented PIO Copy - start
+ *
+ * Start a PIO copy.
+ *
+ * @pbuf: destination buffer
+ * @pbc: the PBC for the PIO buffer
+ * @from: data source, QWORD aligned
+ * @nbytes: bytes to copy
+ */
+void seg_pio_copy_start(struct pio_buf *pbuf, u64 pbc,
+ const void *from, size_t nbytes)
+{
+ void __iomem *dest = pbuf->start + SOP_DISTANCE;
+ void __iomem *send = dest + PIO_BLOCK_SIZE;
+ void __iomem *dend; /* 8-byte data end */
+
+ writeq(pbc, dest);
+ dest += sizeof(u64);
+
+ /* calculate where the QWORD data ends - in SOP=1 space */
+ dend = dest + ((nbytes>>3) * sizeof(u64));
+
+ if (dend < send) {
+ /* all QWORD data is within the SOP block, does *not*
+ reach the end of the SOP block */
+
+ while (dest < dend) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+ /*
+ * No boundary checks are needed here:
+ * 0. We're not on the SOP block boundary
+ * 1. The possible DWORD dangle will still be within
+ * the SOP block
+ * 2. We cannot wrap except on a block boundary.
+ */
+ } else {
+ /* QWORD data extends _to_ or beyond the SOP block */
+
+ /* write 8-byte SOP chunk data */
+ while (dest < send) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+ /* drop out of the SOP range */
+ dest -= SOP_DISTANCE;
+ dend -= SOP_DISTANCE;
+
+ /*
+ * If the wrap comes before or matches the data end,
+ * copy until until the wrap, then wrap.
+ *
+ * If the data ends at the end of the SOP above and
+ * the buffer wraps, then pbuf->end == dend == dest
+ * and nothing will get written, but we will wrap in
+ * case there is a dangling DWORD.
+ */
+ if (pbuf->end <= dend) {
+ while (dest < pbuf->end) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+
+ dest -= pbuf->size;
+ dend -= pbuf->size;
+ }
+
+ /* write 8-byte non-SOP, non-wrap chunk data */
+ while (dest < dend) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+ }
+ /* at this point we have wrapped if we are going to wrap */
+
+ /* ...but it doesn't matter as we're done writing */
+
+ /* save dangling bytes, if any */
+ read_low_bytes(pbuf, from, nbytes & 0x7);
+
+ pbuf->qw_written = 1 /*PBC*/ + (nbytes >> 3);
+}
+
+/*
+ * Mid copy helper, "mixed case" - source is 64-bit aligned but carry
+ * bytes are non-zero.
+ *
+ * Whole u64s must be written to the chip, so bytes must be manually merged.
+ *
+ * @pbuf: destination buffer
+ * @from: data source, is QWORD aligned.
+ * @nbytes: bytes to copy
+ *
+ * Must handle nbytes < 8.
+ */
+static void mid_copy_mix(struct pio_buf *pbuf, const void *from, size_t nbytes)
+{
+ void __iomem *dest = pbuf->start + (pbuf->qw_written * sizeof(u64));
+ void __iomem *dend; /* 8-byte data end */
+ unsigned long qw_to_write = (pbuf->carry_bytes + nbytes) >> 3;
+ unsigned long bytes_left = (pbuf->carry_bytes + nbytes) & 0x7;
+
+ /* calculate 8-byte data end */
+ dend = dest + (qw_to_write * sizeof(u64));
+
+ if (pbuf->qw_written < PIO_BLOCK_QWS) {
+ /*
+ * Still within SOP block. We don't need to check for
+ * wrap because we are still in the first block and
+ * can only wrap on block boundaries.
+ */
+ void __iomem *send; /* SOP end */
+ void __iomem *xend;
+
+ /* calculate the end of data or end of block, whichever
+ comes first */
+ send = pbuf->start + PIO_BLOCK_SIZE;
+ xend = send < dend ? send : dend;
+
+ /* shift up to SOP=1 space */
+ dest += SOP_DISTANCE;
+ xend += SOP_DISTANCE;
+
+ /* write 8-byte chunk data */
+ while (dest < xend) {
+ merge_write8(pbuf, dest, from);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+
+ /* shift down to SOP=0 space */
+ dest -= SOP_DISTANCE;
+ }
+ /*
+ * At this point dest could be (either, both, or neither):
+ * - at dend
+ * - at the wrap
+ */
+
+ /*
+ * If the wrap comes before or matches the data end,
+ * copy until until the wrap, then wrap.
+ *
+ * If dest is at the wrap, we will fall into the if,
+ * not do the loop, when wrap.
+ *
+ * If the data ends at the end of the SOP above and
+ * the buffer wraps, then pbuf->end == dend == dest
+ * and nothing will get written.
+ */
+ if (pbuf->end <= dend) {
+ while (dest < pbuf->end) {
+ merge_write8(pbuf, dest, from);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+
+ dest -= pbuf->size;
+ dend -= pbuf->size;
+ }
+
+ /* write 8-byte non-SOP, non-wrap chunk data */
+ while (dest < dend) {
+ merge_write8(pbuf, dest, from);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+
+ /* adjust carry */
+ if (pbuf->carry_bytes < bytes_left) {
+ /* need to read more */
+ read_extra_bytes(pbuf, from, bytes_left - pbuf->carry_bytes);
+ } else {
+ /* remove invalid bytes */
+ zero_extra_bytes(pbuf, pbuf->carry_bytes - bytes_left);
+ }
+
+ pbuf->qw_written += qw_to_write;
+}
+
+/*
+ * Mid copy helper, "straight case" - source pointer is 64-bit aligned
+ * with no carry bytes.
+ *
+ * @pbuf: destination buffer
+ * @from: data source, is QWORD aligned
+ * @nbytes: bytes to copy
+ *
+ * Must handle nbytes < 8.
+ */
+static void mid_copy_straight(struct pio_buf *pbuf,
+ const void *from, size_t nbytes)
+{
+ void __iomem *dest = pbuf->start + (pbuf->qw_written * sizeof(u64));
+ void __iomem *dend; /* 8-byte data end */
+
+ /* calculate 8-byte data end */
+ dend = dest + ((nbytes>>3) * sizeof(u64));
+
+ if (pbuf->qw_written < PIO_BLOCK_QWS) {
+ /*
+ * Still within SOP block. We don't need to check for
+ * wrap because we are still in the first block and
+ * can only wrap on block boundaries.
+ */
+ void __iomem *send; /* SOP end */
+ void __iomem *xend;
+
+ /* calculate the end of data or end of block, whichever
+ comes first */
+ send = pbuf->start + PIO_BLOCK_SIZE;
+ xend = send < dend ? send : dend;
+
+ /* shift up to SOP=1 space */
+ dest += SOP_DISTANCE;
+ xend += SOP_DISTANCE;
+
+ /* write 8-byte chunk data */
+ while (dest < xend) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+
+ /* shift down to SOP=0 space */
+ dest -= SOP_DISTANCE;
+ }
+ /*
+ * At this point dest could be (either, both, or neither):
+ * - at dend
+ * - at the wrap
+ */
+
+ /*
+ * If the wrap comes before or matches the data end,
+ * copy until until the wrap, then wrap.
+ *
+ * If dest is at the wrap, we will fall into the if,
+ * not do the loop, when wrap.
+ *
+ * If the data ends at the end of the SOP above and
+ * the buffer wraps, then pbuf->end == dend == dest
+ * and nothing will get written.
+ */
+ if (pbuf->end <= dend) {
+ while (dest < pbuf->end) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+
+ dest -= pbuf->size;
+ dend -= pbuf->size;
+ }
+
+ /* write 8-byte non-SOP, non-wrap chunk data */
+ while (dest < dend) {
+ writeq(*(u64 *)from, dest);
+ from += sizeof(u64);
+ dest += sizeof(u64);
+ }
+
+ /* we know carry_bytes was zero on entry to this routine */
+ read_low_bytes(pbuf, from, nbytes & 0x7);
+
+ pbuf->qw_written += nbytes>>3;
+}
+
+/*
+ * Segmented PIO Copy - middle
+ *
+ * Must handle any aligned tail and any aligned source with any byte count.
+ *
+ * @pbuf: a number of blocks allocated within a PIO send context
+ * @from: data source
+ * @nbytes: number of bytes to copy
+ */
+void seg_pio_copy_mid(struct pio_buf *pbuf, const void *from, size_t nbytes)
+{
+ unsigned long from_align = (unsigned long)from & 0x7;
+
+ if (pbuf->carry_bytes + nbytes < 8) {
+ /* not enough bytes to fill a QW */
+ read_extra_bytes(pbuf, from, nbytes);
+ return;
+ }
+
+ if (from_align) {
+ /* misaligned source pointer - align it */
+ unsigned long to_align;
+
+ /* bytes to read to align "from" */
+ to_align = 8 - from_align;
+
+ /*
+ * In the advance-to-alignment logic below, we do not need
+ * to check if we are using more than nbytes. This is because
+ * if we are here, we already know that carry+nbytes will
+ * fill at least one QW.
+ */
+ if (pbuf->carry_bytes + to_align < 8) {
+ /* not enough align bytes to fill a QW */
+ read_extra_bytes(pbuf, from, to_align);
+ from += to_align;
+ nbytes -= to_align;
+ } else {
+ /* bytes to fill carry */
+ unsigned long to_fill = 8 - pbuf->carry_bytes;
+ /* bytes left over to be read */
+ unsigned long extra = to_align - to_fill;
+ void __iomem *dest;
+
+ /* fill carry... */
+ read_extra_bytes(pbuf, from, to_fill);
+ from += to_fill;
+ nbytes -= to_fill;
+
+ /* ...now write carry */
+ dest = pbuf->start + (pbuf->qw_written * sizeof(u64));
+
+ /*
+ * The two checks immediately below cannot both be
+ * true, hence the else. If we have wrapped, we
+ * cannot still be within the first block.
+ * Conversely, if we are still in the first block, we
+ * cannot have wrapped. We do the wrap check first
+ * as that is more likely.
+ */
+ /* adjust if we've wrapped */
+ if (dest >= pbuf->end)
+ dest -= pbuf->size;
+ /* jump to SOP range if within the first block */
+ else if (pbuf->qw_written < PIO_BLOCK_QWS)
+ dest += SOP_DISTANCE;
+
+ carry8_write8(pbuf->carry, dest);
+ pbuf->qw_written++;
+
+ /* read any extra bytes to do final alignment */
+ /* this will overwrite anything in pbuf->carry */
+ read_low_bytes(pbuf, from, extra);
+ from += extra;
+ nbytes -= extra;
+ }
+
+ /* at this point, from is QW aligned */
+ }
+
+ if (pbuf->carry_bytes)
+ mid_copy_mix(pbuf, from, nbytes);
+ else
+ mid_copy_straight(pbuf, from, nbytes);
+}
+
+/*
+ * Segmented PIO Copy - end
+ *
+ * Write any remainder (in pbuf->carry) and finish writing the whole block.
+ *
+ * @pbuf: a number of blocks allocated within a PIO send context
+ */
+void seg_pio_copy_end(struct pio_buf *pbuf)
+{
+ void __iomem *dest = pbuf->start + (pbuf->qw_written * sizeof(u64));
+
+ /*
+ * The two checks immediately below cannot both be true, hence the
+ * else. If we have wrapped, we cannot still be within the first
+ * block. Conversely, if we are still in the first block, we
+ * cannot have wrapped. We do the wrap check first as that is
+ * more likely.
+ */
+ /* adjust if we have wrapped */
+ if (dest >= pbuf->end)
+ dest -= pbuf->size;
+ /* jump to the SOP range if within the first block */
+ else if (pbuf->qw_written < PIO_BLOCK_QWS)
+ dest += SOP_DISTANCE;
+
+ /* write final bytes, if any */
+ if (carry_write8(pbuf, dest)) {
+ dest += sizeof(u64);
+ /*
+ * NOTE: We do not need to recalculate whether dest needs
+ * SOP_DISTANCE or not.
+ *
+ * If we are in the first block and the dangle write
+ * keeps us in the same block, dest will need
+ * to retain SOP_DISTANCE in the loop below.
+ *
+ * If we are in the first block and the dangle write pushes
+ * us to the next block, then loop below will not run
+ * and dest is not used. Hence we do not need to update
+ * it.
+ *
+ * If we are past the first block, then SOP_DISTANCE
+ * was never added, so there is nothing to do.
+ */
+ }
+
+ /* fill in rest of block */
+ while (((unsigned long)dest & PIO_BLOCK_MASK) != 0) {
+ writeq(0, dest);
+ dest += sizeof(u64);
+ }
+
+ /* finished with this buffer */
+ atomic_dec(&pbuf->sc->buffers_allocated);
+}
diff --git a/drivers/staging/rdma/hfi1/platform_config.h b/drivers/staging/rdma/hfi1/platform_config.h
new file mode 100644
index 0000000..8a94a83
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/platform_config.h
@@ -0,0 +1,286 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#ifndef __PLATFORM_CONFIG_H
+#define __PLATFORM_CONFIG_H
+
+#define METADATA_TABLE_FIELD_START_SHIFT 0
+#define METADATA_TABLE_FIELD_START_LEN_BITS 15
+#define METADATA_TABLE_FIELD_LEN_SHIFT 16
+#define METADATA_TABLE_FIELD_LEN_LEN_BITS 16
+
+/* Header structure */
+#define PLATFORM_CONFIG_HEADER_RECORD_IDX_SHIFT 0
+#define PLATFORM_CONFIG_HEADER_RECORD_IDX_LEN_BITS 6
+#define PLATFORM_CONFIG_HEADER_TABLE_LENGTH_SHIFT 16
+#define PLATFORM_CONFIG_HEADER_TABLE_LENGTH_LEN_BITS 12
+#define PLATFORM_CONFIG_HEADER_TABLE_TYPE_SHIFT 28
+#define PLATFORM_CONFIG_HEADER_TABLE_TYPE_LEN_BITS 4
+
+enum platform_config_table_type_encoding {
+ PLATFORM_CONFIG_TABLE_RESERVED,
+ PLATFORM_CONFIG_SYSTEM_TABLE,
+ PLATFORM_CONFIG_PORT_TABLE,
+ PLATFORM_CONFIG_RX_PRESET_TABLE,
+ PLATFORM_CONFIG_TX_PRESET_TABLE,
+ PLATFORM_CONFIG_QSFP_ATTEN_TABLE,
+ PLATFORM_CONFIG_VARIABLE_SETTINGS_TABLE,
+ PLATFORM_CONFIG_TABLE_MAX
+};
+
+enum platform_config_system_table_fields {
+ SYSTEM_TABLE_RESERVED,
+ SYSTEM_TABLE_NODE_STRING,
+ SYSTEM_TABLE_SYSTEM_IMAGE_GUID,
+ SYSTEM_TABLE_NODE_GUID,
+ SYSTEM_TABLE_REVISION,
+ SYSTEM_TABLE_VENDOR_OUI,
+ SYSTEM_TABLE_META_VERSION,
+ SYSTEM_TABLE_DEVICE_ID,
+ SYSTEM_TABLE_PARTITION_ENFORCEMENT_CAP,
+ SYSTEM_TABLE_QSFP_POWER_CLASS_MAX,
+ SYSTEM_TABLE_QSFP_ATTENUATION_DEFAULT_12G,
+ SYSTEM_TABLE_QSFP_ATTENUATION_DEFAULT_25G,
+ SYSTEM_TABLE_VARIABLE_TABLE_ENTRIES_PER_PORT,
+ SYSTEM_TABLE_MAX
+};
+
+enum platform_config_port_table_fields {
+ PORT_TABLE_RESERVED,
+ PORT_TABLE_PORT_TYPE,
+ PORT_TABLE_ATTENUATION_12G,
+ PORT_TABLE_ATTENUATION_25G,
+ PORT_TABLE_LINK_SPEED_SUPPORTED,
+ PORT_TABLE_LINK_WIDTH_SUPPORTED,
+ PORT_TABLE_VL_CAP,
+ PORT_TABLE_MTU_CAP,
+ PORT_TABLE_TX_LANE_ENABLE_MASK,
+ PORT_TABLE_LOCAL_MAX_TIMEOUT,
+ PORT_TABLE_AUTO_LANE_SHEDDING_ENABLED,
+ PORT_TABLE_EXTERNAL_LOOPBACK_ALLOWED,
+ PORT_TABLE_TX_PRESET_IDX_PASSIVE_CU,
+ PORT_TABLE_TX_PRESET_IDX_ACTIVE_NO_EQ,
+ PORT_TABLE_TX_PRESET_IDX_ACTIVE_EQ,
+ PORT_TABLE_RX_PRESET_IDX,
+ PORT_TABLE_CABLE_REACH_CLASS,
+ PORT_TABLE_MAX
+};
+
+enum platform_config_rx_preset_table_fields {
+ RX_PRESET_TABLE_RESERVED,
+ RX_PRESET_TABLE_QSFP_RX_CDR_APPLY,
+ RX_PRESET_TABLE_QSFP_RX_EQ_APPLY,
+ RX_PRESET_TABLE_QSFP_RX_AMP_APPLY,
+ RX_PRESET_TABLE_QSFP_RX_CDR,
+ RX_PRESET_TABLE_QSFP_RX_EQ,
+ RX_PRESET_TABLE_QSFP_RX_AMP,
+ RX_PRESET_TABLE_MAX
+};
+
+enum platform_config_tx_preset_table_fields {
+ TX_PRESET_TABLE_RESERVED,
+ TX_PRESET_TABLE_PRECUR,
+ TX_PRESET_TABLE_ATTN,
+ TX_PRESET_TABLE_POSTCUR,
+ TX_PRESET_TABLE_QSFP_TX_CDR_APPLY,
+ TX_PRESET_TABLE_QSFP_TX_EQ_APPLY,
+ TX_PRESET_TABLE_QSFP_TX_CDR,
+ TX_PRESET_TABLE_QSFP_TX_EQ,
+ TX_PRESET_TABLE_MAX
+};
+
+enum platform_config_qsfp_attn_table_fields {
+ QSFP_ATTEN_TABLE_RESERVED,
+ QSFP_ATTEN_TABLE_TX_PRESET_IDX,
+ QSFP_ATTEN_TABLE_RX_PRESET_IDX,
+ QSFP_ATTEN_TABLE_MAX
+};
+
+enum platform_config_variable_settings_table_fields {
+ VARIABLE_SETTINGS_TABLE_RESERVED,
+ VARIABLE_SETTINGS_TABLE_TX_PRESET_IDX,
+ VARIABLE_SETTINGS_TABLE_RX_PRESET_IDX,
+ VARIABLE_SETTINGS_TABLE_MAX
+};
+
+struct platform_config_data {
+ u32 *table;
+ u32 *table_metadata;
+ u32 num_table;
+};
+
+/*
+ * This struct acts as a quick reference into the platform_data binary image
+ * and is populated by parse_platform_config(...) depending on the specific
+ * META_VERSION
+ */
+struct platform_config_cache {
+ u8 cache_valid;
+ struct platform_config_data config_tables[PLATFORM_CONFIG_TABLE_MAX];
+};
+
+static const u32 platform_config_table_limits[PLATFORM_CONFIG_TABLE_MAX] = {
+ 0,
+ SYSTEM_TABLE_MAX,
+ PORT_TABLE_MAX,
+ RX_PRESET_TABLE_MAX,
+ TX_PRESET_TABLE_MAX,
+ QSFP_ATTEN_TABLE_MAX,
+ VARIABLE_SETTINGS_TABLE_MAX
+};
+
+/* This section defines default values and encodings for the
+ * fields defined for each table above
+ */
+
+/*=====================================================
+ * System table encodings
+ *====================================================*/
+#define PLATFORM_CONFIG_MAGIC_NUM 0x3d4f5041
+#define PLATFORM_CONFIG_MAGIC_NUMBER_LEN 4
+
+/*
+ * These power classes are the same as defined in SFF 8636 spec rev 2.4
+ * describing byte 129 in table 6-16, except enumerated in a different order
+ */
+enum platform_config_qsfp_power_class_encoding {
+ QSFP_POWER_CLASS_1 = 1,
+ QSFP_POWER_CLASS_2,
+ QSFP_POWER_CLASS_3,
+ QSFP_POWER_CLASS_4,
+ QSFP_POWER_CLASS_5,
+ QSFP_POWER_CLASS_6,
+ QSFP_POWER_CLASS_7
+};
+
+
+/*=====================================================
+ * Port table encodings
+ *==================================================== */
+enum platform_config_port_type_encoding {
+ PORT_TYPE_RESERVED,
+ PORT_TYPE_DISCONNECTED,
+ PORT_TYPE_FIXED,
+ PORT_TYPE_VARIABLE,
+ PORT_TYPE_QSFP,
+ PORT_TYPE_MAX
+};
+
+enum platform_config_link_speed_supported_encoding {
+ LINK_SPEED_SUPP_12G = 1,
+ LINK_SPEED_SUPP_25G,
+ LINK_SPEED_SUPP_12G_25G,
+ LINK_SPEED_SUPP_MAX
+};
+
+/*
+ * This is a subset (not strict) of the link downgrades
+ * supported. The link downgrades supported are expected
+ * to be supplied to the driver by another entity such as
+ * the fabric manager
+ */
+enum platform_config_link_width_supported_encoding {
+ LINK_WIDTH_SUPP_1X = 1,
+ LINK_WIDTH_SUPP_2X,
+ LINK_WIDTH_SUPP_2X_1X,
+ LINK_WIDTH_SUPP_3X,
+ LINK_WIDTH_SUPP_3X_1X,
+ LINK_WIDTH_SUPP_3X_2X,
+ LINK_WIDTH_SUPP_3X_2X_1X,
+ LINK_WIDTH_SUPP_4X,
+ LINK_WIDTH_SUPP_4X_1X,
+ LINK_WIDTH_SUPP_4X_2X,
+ LINK_WIDTH_SUPP_4X_2X_1X,
+ LINK_WIDTH_SUPP_4X_3X,
+ LINK_WIDTH_SUPP_4X_3X_1X,
+ LINK_WIDTH_SUPP_4X_3X_2X,
+ LINK_WIDTH_SUPP_4X_3X_2X_1X,
+ LINK_WIDTH_SUPP_MAX
+};
+
+enum platform_config_virtual_lane_capability_encoding {
+ VL_CAP_VL0 = 1,
+ VL_CAP_VL0_1,
+ VL_CAP_VL0_2,
+ VL_CAP_VL0_3,
+ VL_CAP_VL0_4,
+ VL_CAP_VL0_5,
+ VL_CAP_VL0_6,
+ VL_CAP_VL0_7,
+ VL_CAP_VL0_8,
+ VL_CAP_VL0_9,
+ VL_CAP_VL0_10,
+ VL_CAP_VL0_11,
+ VL_CAP_VL0_12,
+ VL_CAP_VL0_13,
+ VL_CAP_VL0_14,
+ VL_CAP_MAX
+};
+
+/* Max MTU */
+enum platform_config_mtu_capability_encoding {
+ MTU_CAP_256 = 1,
+ MTU_CAP_512 = 2,
+ MTU_CAP_1024 = 3,
+ MTU_CAP_2048 = 4,
+ MTU_CAP_4096 = 5,
+ MTU_CAP_8192 = 6,
+ MTU_CAP_10240 = 7
+};
+
+enum platform_config_local_max_timeout_encoding {
+ LOCAL_MAX_TIMEOUT_10_MS = 1,
+ LOCAL_MAX_TIMEOUT_100_MS,
+ LOCAL_MAX_TIMEOUT_1_S,
+ LOCAL_MAX_TIMEOUT_10_S,
+ LOCAL_MAX_TIMEOUT_100_S,
+ LOCAL_MAX_TIMEOUT_1000_S
+};
+
+#endif /*__PLATFORM_CONFIG_H*/
diff --git a/drivers/staging/rdma/hfi1/qp.c b/drivers/staging/rdma/hfi1/qp.c
new file mode 100644
index 0000000..df1fa56
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/qp.c
@@ -0,0 +1,1687 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/vmalloc.h>
+#include <linux/hash.h>
+#include <linux/module.h>
+#include <linux/random.h>
+#include <linux/seq_file.h>
+
+#include "hfi.h"
+#include "qp.h"
+#include "trace.h"
+#include "sdma.h"
+
+#define BITS_PER_PAGE (PAGE_SIZE*BITS_PER_BYTE)
+#define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1)
+
+static unsigned int hfi1_qp_table_size = 256;
+module_param_named(qp_table_size, hfi1_qp_table_size, uint, S_IRUGO);
+MODULE_PARM_DESC(qp_table_size, "QP table size");
+
+static void flush_tx_list(struct hfi1_qp *qp);
+static int iowait_sleep(
+ struct sdma_engine *sde,
+ struct iowait *wait,
+ struct sdma_txreq *stx,
+ unsigned seq);
+static void iowait_wakeup(struct iowait *wait, int reason);
+
+static inline unsigned mk_qpn(struct hfi1_qpn_table *qpt,
+ struct qpn_map *map, unsigned off)
+{
+ return (map - qpt->map) * BITS_PER_PAGE + off;
+}
+
+/*
+ * Convert the AETH credit code into the number of credits.
+ */
+static const u16 credit_table[31] = {
+ 0, /* 0 */
+ 1, /* 1 */
+ 2, /* 2 */
+ 3, /* 3 */
+ 4, /* 4 */
+ 6, /* 5 */
+ 8, /* 6 */
+ 12, /* 7 */
+ 16, /* 8 */
+ 24, /* 9 */
+ 32, /* A */
+ 48, /* B */
+ 64, /* C */
+ 96, /* D */
+ 128, /* E */
+ 192, /* F */
+ 256, /* 10 */
+ 384, /* 11 */
+ 512, /* 12 */
+ 768, /* 13 */
+ 1024, /* 14 */
+ 1536, /* 15 */
+ 2048, /* 16 */
+ 3072, /* 17 */
+ 4096, /* 18 */
+ 6144, /* 19 */
+ 8192, /* 1A */
+ 12288, /* 1B */
+ 16384, /* 1C */
+ 24576, /* 1D */
+ 32768 /* 1E */
+};
+
+static void get_map_page(struct hfi1_qpn_table *qpt, struct qpn_map *map)
+{
+ unsigned long page = get_zeroed_page(GFP_KERNEL);
+
+ /*
+ * Free the page if someone raced with us installing it.
+ */
+
+ spin_lock(&qpt->lock);
+ if (map->page)
+ free_page(page);
+ else
+ map->page = (void *)page;
+ spin_unlock(&qpt->lock);
+}
+
+/*
+ * Allocate the next available QPN or
+ * zero/one for QP type IB_QPT_SMI/IB_QPT_GSI.
+ */
+static int alloc_qpn(struct hfi1_devdata *dd, struct hfi1_qpn_table *qpt,
+ enum ib_qp_type type, u8 port)
+{
+ u32 i, offset, max_scan, qpn;
+ struct qpn_map *map;
+ u32 ret;
+
+ if (type == IB_QPT_SMI || type == IB_QPT_GSI) {
+ unsigned n;
+
+ ret = type == IB_QPT_GSI;
+ n = 1 << (ret + 2 * (port - 1));
+ spin_lock(&qpt->lock);
+ if (qpt->flags & n)
+ ret = -EINVAL;
+ else
+ qpt->flags |= n;
+ spin_unlock(&qpt->lock);
+ goto bail;
+ }
+
+ qpn = qpt->last + qpt->incr;
+ if (qpn >= QPN_MAX)
+ qpn = qpt->incr | ((qpt->last & 1) ^ 1);
+ /* offset carries bit 0 */
+ offset = qpn & BITS_PER_PAGE_MASK;
+ map = &qpt->map[qpn / BITS_PER_PAGE];
+ max_scan = qpt->nmaps - !offset;
+ for (i = 0;;) {
+ if (unlikely(!map->page)) {
+ get_map_page(qpt, map);
+ if (unlikely(!map->page))
+ break;
+ }
+ do {
+ if (!test_and_set_bit(offset, map->page)) {
+ qpt->last = qpn;
+ ret = qpn;
+ goto bail;
+ }
+ offset += qpt->incr;
+ /*
+ * This qpn might be bogus if offset >= BITS_PER_PAGE.
+ * That is OK. It gets re-assigned below
+ */
+ qpn = mk_qpn(qpt, map, offset);
+ } while (offset < BITS_PER_PAGE && qpn < QPN_MAX);
+ /*
+ * In order to keep the number of pages allocated to a
+ * minimum, we scan the all existing pages before increasing
+ * the size of the bitmap table.
+ */
+ if (++i > max_scan) {
+ if (qpt->nmaps == QPNMAP_ENTRIES)
+ break;
+ map = &qpt->map[qpt->nmaps++];
+ /* start at incr with current bit 0 */
+ offset = qpt->incr | (offset & 1);
+ } else if (map < &qpt->map[qpt->nmaps]) {
+ ++map;
+ /* start at incr with current bit 0 */
+ offset = qpt->incr | (offset & 1);
+ } else {
+ map = &qpt->map[0];
+ /* wrap to first map page, invert bit 0 */
+ offset = qpt->incr | ((offset & 1) ^ 1);
+ }
+ /* there can be no bits at shift and below */
+ WARN_ON(offset & (dd->qos_shift - 1));
+ qpn = mk_qpn(qpt, map, offset);
+ }
+
+ ret = -ENOMEM;
+
+bail:
+ return ret;
+}
+
+static void free_qpn(struct hfi1_qpn_table *qpt, u32 qpn)
+{
+ struct qpn_map *map;
+
+ map = qpt->map + qpn / BITS_PER_PAGE;
+ if (map->page)
+ clear_bit(qpn & BITS_PER_PAGE_MASK, map->page);
+}
+
+/*
+ * Put the QP into the hash table.
+ * The hash table holds a reference to the QP.
+ */
+static void insert_qp(struct hfi1_ibdev *dev, struct hfi1_qp *qp)
+{
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ unsigned long flags;
+
+ atomic_inc(&qp->refcount);
+ spin_lock_irqsave(&dev->qp_dev->qpt_lock, flags);
+
+ if (qp->ibqp.qp_num <= 1) {
+ rcu_assign_pointer(ibp->qp[qp->ibqp.qp_num], qp);
+ } else {
+ u32 n = qpn_hash(dev->qp_dev, qp->ibqp.qp_num);
+
+ qp->next = dev->qp_dev->qp_table[n];
+ rcu_assign_pointer(dev->qp_dev->qp_table[n], qp);
+ trace_hfi1_qpinsert(qp, n);
+ }
+
+ spin_unlock_irqrestore(&dev->qp_dev->qpt_lock, flags);
+}
+
+/*
+ * Remove the QP from the table so it can't be found asynchronously by
+ * the receive interrupt routine.
+ */
+static void remove_qp(struct hfi1_ibdev *dev, struct hfi1_qp *qp)
+{
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ u32 n = qpn_hash(dev->qp_dev, qp->ibqp.qp_num);
+ unsigned long flags;
+ int removed = 1;
+
+ spin_lock_irqsave(&dev->qp_dev->qpt_lock, flags);
+
+ if (rcu_dereference_protected(ibp->qp[0],
+ lockdep_is_held(&dev->qp_dev->qpt_lock)) == qp) {
+ RCU_INIT_POINTER(ibp->qp[0], NULL);
+ } else if (rcu_dereference_protected(ibp->qp[1],
+ lockdep_is_held(&dev->qp_dev->qpt_lock)) == qp) {
+ RCU_INIT_POINTER(ibp->qp[1], NULL);
+ } else {
+ struct hfi1_qp *q;
+ struct hfi1_qp __rcu **qpp;
+
+ removed = 0;
+ qpp = &dev->qp_dev->qp_table[n];
+ for (; (q = rcu_dereference_protected(*qpp,
+ lockdep_is_held(&dev->qp_dev->qpt_lock)))
+ != NULL;
+ qpp = &q->next)
+ if (q == qp) {
+ RCU_INIT_POINTER(*qpp,
+ rcu_dereference_protected(qp->next,
+ lockdep_is_held(&dev->qp_dev->qpt_lock)));
+ removed = 1;
+ trace_hfi1_qpremove(qp, n);
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&dev->qp_dev->qpt_lock, flags);
+ if (removed) {
+ synchronize_rcu();
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+ }
+}
+
+/**
+ * free_all_qps - check for QPs still in use
+ * @qpt: the QP table to empty
+ *
+ * There should not be any QPs still in use.
+ * Free memory for table.
+ */
+static unsigned free_all_qps(struct hfi1_devdata *dd)
+{
+ struct hfi1_ibdev *dev = &dd->verbs_dev;
+ unsigned long flags;
+ struct hfi1_qp *qp;
+ unsigned n, qp_inuse = 0;
+
+ for (n = 0; n < dd->num_pports; n++) {
+ struct hfi1_ibport *ibp = &dd->pport[n].ibport_data;
+
+ if (!hfi1_mcast_tree_empty(ibp))
+ qp_inuse++;
+ rcu_read_lock();
+ if (rcu_dereference(ibp->qp[0]))
+ qp_inuse++;
+ if (rcu_dereference(ibp->qp[1]))
+ qp_inuse++;
+ rcu_read_unlock();
+ }
+
+ if (!dev->qp_dev)
+ goto bail;
+ spin_lock_irqsave(&dev->qp_dev->qpt_lock, flags);
+ for (n = 0; n < dev->qp_dev->qp_table_size; n++) {
+ qp = rcu_dereference_protected(dev->qp_dev->qp_table[n],
+ lockdep_is_held(&dev->qp_dev->qpt_lock));
+ RCU_INIT_POINTER(dev->qp_dev->qp_table[n], NULL);
+
+ for (; qp; qp = rcu_dereference_protected(qp->next,
+ lockdep_is_held(&dev->qp_dev->qpt_lock)))
+ qp_inuse++;
+ }
+ spin_unlock_irqrestore(&dev->qp_dev->qpt_lock, flags);
+ synchronize_rcu();
+bail:
+ return qp_inuse;
+}
+
+/**
+ * reset_qp - initialize the QP state to the reset state
+ * @qp: the QP to reset
+ * @type: the QP type
+ */
+static void reset_qp(struct hfi1_qp *qp, enum ib_qp_type type)
+{
+ qp->remote_qpn = 0;
+ qp->qkey = 0;
+ qp->qp_access_flags = 0;
+ iowait_init(
+ &qp->s_iowait,
+ 1,
+ hfi1_do_send,
+ iowait_sleep,
+ iowait_wakeup);
+ qp->s_flags &= HFI1_S_SIGNAL_REQ_WR;
+ qp->s_hdrwords = 0;
+ qp->s_wqe = NULL;
+ qp->s_draining = 0;
+ qp->s_next_psn = 0;
+ qp->s_last_psn = 0;
+ qp->s_sending_psn = 0;
+ qp->s_sending_hpsn = 0;
+ qp->s_psn = 0;
+ qp->r_psn = 0;
+ qp->r_msn = 0;
+ if (type == IB_QPT_RC) {
+ qp->s_state = IB_OPCODE_RC_SEND_LAST;
+ qp->r_state = IB_OPCODE_RC_SEND_LAST;
+ } else {
+ qp->s_state = IB_OPCODE_UC_SEND_LAST;
+ qp->r_state = IB_OPCODE_UC_SEND_LAST;
+ }
+ qp->s_ack_state = IB_OPCODE_RC_ACKNOWLEDGE;
+ qp->r_nak_state = 0;
+ qp->r_aflags = 0;
+ qp->r_flags = 0;
+ qp->s_head = 0;
+ qp->s_tail = 0;
+ qp->s_cur = 0;
+ qp->s_acked = 0;
+ qp->s_last = 0;
+ qp->s_ssn = 1;
+ qp->s_lsn = 0;
+ clear_ahg(qp);
+ qp->s_mig_state = IB_MIG_MIGRATED;
+ memset(qp->s_ack_queue, 0, sizeof(qp->s_ack_queue));
+ qp->r_head_ack_queue = 0;
+ qp->s_tail_ack_queue = 0;
+ qp->s_num_rd_atomic = 0;
+ if (qp->r_rq.wq) {
+ qp->r_rq.wq->head = 0;
+ qp->r_rq.wq->tail = 0;
+ }
+ qp->r_sge.num_sge = 0;
+}
+
+static void clear_mr_refs(struct hfi1_qp *qp, int clr_sends)
+{
+ unsigned n;
+
+ if (test_and_clear_bit(HFI1_R_REWIND_SGE, &qp->r_aflags))
+ hfi1_put_ss(&qp->s_rdma_read_sge);
+
+ hfi1_put_ss(&qp->r_sge);
+
+ if (clr_sends) {
+ while (qp->s_last != qp->s_head) {
+ struct hfi1_swqe *wqe = get_swqe_ptr(qp, qp->s_last);
+ unsigned i;
+
+ for (i = 0; i < wqe->wr.num_sge; i++) {
+ struct hfi1_sge *sge = &wqe->sg_list[i];
+
+ hfi1_put_mr(sge->mr);
+ }
+ if (qp->ibqp.qp_type == IB_QPT_UD ||
+ qp->ibqp.qp_type == IB_QPT_SMI ||
+ qp->ibqp.qp_type == IB_QPT_GSI)
+ atomic_dec(&to_iah(wqe->wr.wr.ud.ah)->refcount);
+ if (++qp->s_last >= qp->s_size)
+ qp->s_last = 0;
+ }
+ if (qp->s_rdma_mr) {
+ hfi1_put_mr(qp->s_rdma_mr);
+ qp->s_rdma_mr = NULL;
+ }
+ }
+
+ if (qp->ibqp.qp_type != IB_QPT_RC)
+ return;
+
+ for (n = 0; n < ARRAY_SIZE(qp->s_ack_queue); n++) {
+ struct hfi1_ack_entry *e = &qp->s_ack_queue[n];
+
+ if (e->opcode == IB_OPCODE_RC_RDMA_READ_REQUEST &&
+ e->rdma_sge.mr) {
+ hfi1_put_mr(e->rdma_sge.mr);
+ e->rdma_sge.mr = NULL;
+ }
+ }
+}
+
+/**
+ * hfi1_error_qp - put a QP into the error state
+ * @qp: the QP to put into the error state
+ * @err: the receive completion error to signal if a RWQE is active
+ *
+ * Flushes both send and receive work queues.
+ * Returns true if last WQE event should be generated.
+ * The QP r_lock and s_lock should be held and interrupts disabled.
+ * If we are already in error state, just return.
+ */
+int hfi1_error_qp(struct hfi1_qp *qp, enum ib_wc_status err)
+{
+ struct hfi1_ibdev *dev = to_idev(qp->ibqp.device);
+ struct ib_wc wc;
+ int ret = 0;
+
+ if (qp->state == IB_QPS_ERR || qp->state == IB_QPS_RESET)
+ goto bail;
+
+ qp->state = IB_QPS_ERR;
+
+ if (qp->s_flags & (HFI1_S_TIMER | HFI1_S_WAIT_RNR)) {
+ qp->s_flags &= ~(HFI1_S_TIMER | HFI1_S_WAIT_RNR);
+ del_timer(&qp->s_timer);
+ }
+
+ if (qp->s_flags & HFI1_S_ANY_WAIT_SEND)
+ qp->s_flags &= ~HFI1_S_ANY_WAIT_SEND;
+
+ write_seqlock(&dev->iowait_lock);
+ if (!list_empty(&qp->s_iowait.list) && !(qp->s_flags & HFI1_S_BUSY)) {
+ qp->s_flags &= ~HFI1_S_ANY_WAIT_IO;
+ list_del_init(&qp->s_iowait.list);
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+ }
+ write_sequnlock(&dev->iowait_lock);
+
+ if (!(qp->s_flags & HFI1_S_BUSY)) {
+ qp->s_hdrwords = 0;
+ if (qp->s_rdma_mr) {
+ hfi1_put_mr(qp->s_rdma_mr);
+ qp->s_rdma_mr = NULL;
+ }
+ flush_tx_list(qp);
+ }
+
+ /* Schedule the sending tasklet to drain the send work queue. */
+ if (qp->s_last != qp->s_head)
+ hfi1_schedule_send(qp);
+
+ clear_mr_refs(qp, 0);
+
+ memset(&wc, 0, sizeof(wc));
+ wc.qp = &qp->ibqp;
+ wc.opcode = IB_WC_RECV;
+
+ if (test_and_clear_bit(HFI1_R_WRID_VALID, &qp->r_aflags)) {
+ wc.wr_id = qp->r_wr_id;
+ wc.status = err;
+ hfi1_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
+ }
+ wc.status = IB_WC_WR_FLUSH_ERR;
+
+ if (qp->r_rq.wq) {
+ struct hfi1_rwq *wq;
+ u32 head;
+ u32 tail;
+
+ spin_lock(&qp->r_rq.lock);
+
+ /* sanity check pointers before trusting them */
+ wq = qp->r_rq.wq;
+ head = wq->head;
+ if (head >= qp->r_rq.size)
+ head = 0;
+ tail = wq->tail;
+ if (tail >= qp->r_rq.size)
+ tail = 0;
+ while (tail != head) {
+ wc.wr_id = get_rwqe_ptr(&qp->r_rq, tail)->wr_id;
+ if (++tail >= qp->r_rq.size)
+ tail = 0;
+ hfi1_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
+ }
+ wq->tail = tail;
+
+ spin_unlock(&qp->r_rq.lock);
+ } else if (qp->ibqp.event_handler)
+ ret = 1;
+
+bail:
+ return ret;
+}
+
+static void flush_tx_list(struct hfi1_qp *qp)
+{
+ while (!list_empty(&qp->s_iowait.tx_head)) {
+ struct sdma_txreq *tx;
+
+ tx = list_first_entry(
+ &qp->s_iowait.tx_head,
+ struct sdma_txreq,
+ list);
+ list_del_init(&tx->list);
+ hfi1_put_txreq(
+ container_of(tx, struct verbs_txreq, txreq));
+ }
+}
+
+static void flush_iowait(struct hfi1_qp *qp)
+{
+ struct hfi1_ibdev *dev = to_idev(qp->ibqp.device);
+ unsigned long flags;
+
+ write_seqlock_irqsave(&dev->iowait_lock, flags);
+ if (!list_empty(&qp->s_iowait.list)) {
+ list_del_init(&qp->s_iowait.list);
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+ }
+ write_sequnlock_irqrestore(&dev->iowait_lock, flags);
+}
+
+static inline int opa_mtu_enum_to_int(int mtu)
+{
+ switch (mtu) {
+ case OPA_MTU_8192: return 8192;
+ case OPA_MTU_10240: return 10240;
+ default: return -1;
+ }
+}
+
+/**
+ * This function is what we would push to the core layer if we wanted to be a
+ * "first class citizen". Instead we hide this here and rely on Verbs ULPs
+ * to blindly pass the MTU enum value from the PathRecord to us.
+ *
+ * The actual flag used to determine "8k MTU" will change and is currently
+ * unknown.
+ */
+static inline int verbs_mtu_enum_to_int(struct ib_device *dev, enum ib_mtu mtu)
+{
+ int val = opa_mtu_enum_to_int((int)mtu);
+
+ if (val > 0)
+ return val;
+ return ib_mtu_enum_to_int(mtu);
+}
+
+
+/**
+ * hfi1_modify_qp - modify the attributes of a queue pair
+ * @ibqp: the queue pair who's attributes we're modifying
+ * @attr: the new attributes
+ * @attr_mask: the mask of attributes to modify
+ * @udata: user data for libibverbs.so
+ *
+ * Returns 0 on success, otherwise returns an errno.
+ */
+int hfi1_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_udata *udata)
+{
+ struct hfi1_ibdev *dev = to_idev(ibqp->device);
+ struct hfi1_qp *qp = to_iqp(ibqp);
+ enum ib_qp_state cur_state, new_state;
+ struct ib_event ev;
+ int lastwqe = 0;
+ int mig = 0;
+ int ret;
+ u32 pmtu = 0; /* for gcc warning only */
+ struct hfi1_devdata *dd;
+
+ spin_lock_irq(&qp->r_lock);
+ spin_lock(&qp->s_lock);
+
+ cur_state = attr_mask & IB_QP_CUR_STATE ?
+ attr->cur_qp_state : qp->state;
+ new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
+
+ if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type,
+ attr_mask, IB_LINK_LAYER_UNSPECIFIED))
+ goto inval;
+
+ if (attr_mask & IB_QP_AV) {
+ if (attr->ah_attr.dlid >= HFI1_MULTICAST_LID_BASE)
+ goto inval;
+ if (hfi1_check_ah(qp->ibqp.device, &attr->ah_attr))
+ goto inval;
+ }
+
+ if (attr_mask & IB_QP_ALT_PATH) {
+ if (attr->alt_ah_attr.dlid >= HFI1_MULTICAST_LID_BASE)
+ goto inval;
+ if (hfi1_check_ah(qp->ibqp.device, &attr->alt_ah_attr))
+ goto inval;
+ if (attr->alt_pkey_index >= hfi1_get_npkeys(dd_from_dev(dev)))
+ goto inval;
+ }
+
+ if (attr_mask & IB_QP_PKEY_INDEX)
+ if (attr->pkey_index >= hfi1_get_npkeys(dd_from_dev(dev)))
+ goto inval;
+
+ if (attr_mask & IB_QP_MIN_RNR_TIMER)
+ if (attr->min_rnr_timer > 31)
+ goto inval;
+
+ if (attr_mask & IB_QP_PORT)
+ if (qp->ibqp.qp_type == IB_QPT_SMI ||
+ qp->ibqp.qp_type == IB_QPT_GSI ||
+ attr->port_num == 0 ||
+ attr->port_num > ibqp->device->phys_port_cnt)
+ goto inval;
+
+ if (attr_mask & IB_QP_DEST_QPN)
+ if (attr->dest_qp_num > HFI1_QPN_MASK)
+ goto inval;
+
+ if (attr_mask & IB_QP_RETRY_CNT)
+ if (attr->retry_cnt > 7)
+ goto inval;
+
+ if (attr_mask & IB_QP_RNR_RETRY)
+ if (attr->rnr_retry > 7)
+ goto inval;
+
+ /*
+ * Don't allow invalid path_mtu values. OK to set greater
+ * than the active mtu (or even the max_cap, if we have tuned
+ * that to a small mtu. We'll set qp->path_mtu
+ * to the lesser of requested attribute mtu and active,
+ * for packetizing messages.
+ * Note that the QP port has to be set in INIT and MTU in RTR.
+ */
+ if (attr_mask & IB_QP_PATH_MTU) {
+ int mtu, pidx = qp->port_num - 1;
+
+ dd = dd_from_dev(dev);
+ mtu = verbs_mtu_enum_to_int(ibqp->device, attr->path_mtu);
+ if (mtu == -1)
+ goto inval;
+
+ if (mtu > dd->pport[pidx].ibmtu)
+ pmtu = mtu_to_enum(dd->pport[pidx].ibmtu, IB_MTU_2048);
+ else
+ pmtu = attr->path_mtu;
+ }
+
+ if (attr_mask & IB_QP_PATH_MIG_STATE) {
+ if (attr->path_mig_state == IB_MIG_REARM) {
+ if (qp->s_mig_state == IB_MIG_ARMED)
+ goto inval;
+ if (new_state != IB_QPS_RTS)
+ goto inval;
+ } else if (attr->path_mig_state == IB_MIG_MIGRATED) {
+ if (qp->s_mig_state == IB_MIG_REARM)
+ goto inval;
+ if (new_state != IB_QPS_RTS && new_state != IB_QPS_SQD)
+ goto inval;
+ if (qp->s_mig_state == IB_MIG_ARMED)
+ mig = 1;
+ } else
+ goto inval;
+ }
+
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
+ if (attr->max_dest_rd_atomic > HFI1_MAX_RDMA_ATOMIC)
+ goto inval;
+
+ switch (new_state) {
+ case IB_QPS_RESET:
+ if (qp->state != IB_QPS_RESET) {
+ qp->state = IB_QPS_RESET;
+ flush_iowait(qp);
+ qp->s_flags &= ~(HFI1_S_TIMER | HFI1_S_ANY_WAIT);
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irq(&qp->r_lock);
+ /* Stop the sending work queue and retry timer */
+ cancel_work_sync(&qp->s_iowait.iowork);
+ del_timer_sync(&qp->s_timer);
+ iowait_sdma_drain(&qp->s_iowait);
+ flush_tx_list(qp);
+ remove_qp(dev, qp);
+ wait_event(qp->wait, !atomic_read(&qp->refcount));
+ spin_lock_irq(&qp->r_lock);
+ spin_lock(&qp->s_lock);
+ clear_mr_refs(qp, 1);
+ clear_ahg(qp);
+ reset_qp(qp, ibqp->qp_type);
+ }
+ break;
+
+ case IB_QPS_RTR:
+ /* Allow event to re-trigger if QP set to RTR more than once */
+ qp->r_flags &= ~HFI1_R_COMM_EST;
+ qp->state = new_state;
+ break;
+
+ case IB_QPS_SQD:
+ qp->s_draining = qp->s_last != qp->s_cur;
+ qp->state = new_state;
+ break;
+
+ case IB_QPS_SQE:
+ if (qp->ibqp.qp_type == IB_QPT_RC)
+ goto inval;
+ qp->state = new_state;
+ break;
+
+ case IB_QPS_ERR:
+ lastwqe = hfi1_error_qp(qp, IB_WC_WR_FLUSH_ERR);
+ break;
+
+ default:
+ qp->state = new_state;
+ break;
+ }
+
+ if (attr_mask & IB_QP_PKEY_INDEX)
+ qp->s_pkey_index = attr->pkey_index;
+
+ if (attr_mask & IB_QP_PORT)
+ qp->port_num = attr->port_num;
+
+ if (attr_mask & IB_QP_DEST_QPN)
+ qp->remote_qpn = attr->dest_qp_num;
+
+ if (attr_mask & IB_QP_SQ_PSN) {
+ qp->s_next_psn = attr->sq_psn & PSN_MODIFY_MASK;
+ qp->s_psn = qp->s_next_psn;
+ qp->s_sending_psn = qp->s_next_psn;
+ qp->s_last_psn = qp->s_next_psn - 1;
+ qp->s_sending_hpsn = qp->s_last_psn;
+ }
+
+ if (attr_mask & IB_QP_RQ_PSN)
+ qp->r_psn = attr->rq_psn & PSN_MODIFY_MASK;
+
+ if (attr_mask & IB_QP_ACCESS_FLAGS)
+ qp->qp_access_flags = attr->qp_access_flags;
+
+ if (attr_mask & IB_QP_AV) {
+ qp->remote_ah_attr = attr->ah_attr;
+ qp->s_srate = attr->ah_attr.static_rate;
+ qp->srate_mbps = ib_rate_to_mbps(qp->s_srate);
+ }
+
+ if (attr_mask & IB_QP_ALT_PATH) {
+ qp->alt_ah_attr = attr->alt_ah_attr;
+ qp->s_alt_pkey_index = attr->alt_pkey_index;
+ }
+
+ if (attr_mask & IB_QP_PATH_MIG_STATE) {
+ qp->s_mig_state = attr->path_mig_state;
+ if (mig) {
+ qp->remote_ah_attr = qp->alt_ah_attr;
+ qp->port_num = qp->alt_ah_attr.port_num;
+ qp->s_pkey_index = qp->s_alt_pkey_index;
+ qp->s_flags |= HFI1_S_AHG_CLEAR;
+ }
+ }
+
+ if (attr_mask & IB_QP_PATH_MTU) {
+ struct hfi1_ibport *ibp;
+ u8 sc, vl;
+ u32 mtu;
+
+ dd = dd_from_dev(dev);
+ ibp = &dd->pport[qp->port_num - 1].ibport_data;
+
+ sc = ibp->sl_to_sc[qp->remote_ah_attr.sl];
+ vl = sc_to_vlt(dd, sc);
+
+ mtu = verbs_mtu_enum_to_int(ibqp->device, pmtu);
+ if (vl < PER_VL_SEND_CONTEXTS)
+ mtu = min_t(u32, mtu, dd->vld[vl].mtu);
+ pmtu = mtu_to_enum(mtu, OPA_MTU_8192);
+
+ qp->path_mtu = pmtu;
+ qp->pmtu = mtu;
+ }
+
+ if (attr_mask & IB_QP_RETRY_CNT) {
+ qp->s_retry_cnt = attr->retry_cnt;
+ qp->s_retry = attr->retry_cnt;
+ }
+
+ if (attr_mask & IB_QP_RNR_RETRY) {
+ qp->s_rnr_retry_cnt = attr->rnr_retry;
+ qp->s_rnr_retry = attr->rnr_retry;
+ }
+
+ if (attr_mask & IB_QP_MIN_RNR_TIMER)
+ qp->r_min_rnr_timer = attr->min_rnr_timer;
+
+ if (attr_mask & IB_QP_TIMEOUT) {
+ qp->timeout = attr->timeout;
+ qp->timeout_jiffies =
+ usecs_to_jiffies((4096UL * (1UL << qp->timeout)) /
+ 1000UL);
+ }
+
+ if (attr_mask & IB_QP_QKEY)
+ qp->qkey = attr->qkey;
+
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
+ qp->r_max_rd_atomic = attr->max_dest_rd_atomic;
+
+ if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
+ qp->s_max_rd_atomic = attr->max_rd_atomic;
+
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irq(&qp->r_lock);
+
+ if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
+ insert_qp(dev, qp);
+
+ if (lastwqe) {
+ ev.device = qp->ibqp.device;
+ ev.element.qp = &qp->ibqp;
+ ev.event = IB_EVENT_QP_LAST_WQE_REACHED;
+ qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
+ }
+ if (mig) {
+ ev.device = qp->ibqp.device;
+ ev.element.qp = &qp->ibqp;
+ ev.event = IB_EVENT_PATH_MIG;
+ qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
+ }
+ ret = 0;
+ goto bail;
+
+inval:
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irq(&qp->r_lock);
+ ret = -EINVAL;
+
+bail:
+ return ret;
+}
+
+int hfi1_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_qp_init_attr *init_attr)
+{
+ struct hfi1_qp *qp = to_iqp(ibqp);
+
+ attr->qp_state = qp->state;
+ attr->cur_qp_state = attr->qp_state;
+ attr->path_mtu = qp->path_mtu;
+ attr->path_mig_state = qp->s_mig_state;
+ attr->qkey = qp->qkey;
+ attr->rq_psn = mask_psn(qp->r_psn);
+ attr->sq_psn = mask_psn(qp->s_next_psn);
+ attr->dest_qp_num = qp->remote_qpn;
+ attr->qp_access_flags = qp->qp_access_flags;
+ attr->cap.max_send_wr = qp->s_size - 1;
+ attr->cap.max_recv_wr = qp->ibqp.srq ? 0 : qp->r_rq.size - 1;
+ attr->cap.max_send_sge = qp->s_max_sge;
+ attr->cap.max_recv_sge = qp->r_rq.max_sge;
+ attr->cap.max_inline_data = 0;
+ attr->ah_attr = qp->remote_ah_attr;
+ attr->alt_ah_attr = qp->alt_ah_attr;
+ attr->pkey_index = qp->s_pkey_index;
+ attr->alt_pkey_index = qp->s_alt_pkey_index;
+ attr->en_sqd_async_notify = 0;
+ attr->sq_draining = qp->s_draining;
+ attr->max_rd_atomic = qp->s_max_rd_atomic;
+ attr->max_dest_rd_atomic = qp->r_max_rd_atomic;
+ attr->min_rnr_timer = qp->r_min_rnr_timer;
+ attr->port_num = qp->port_num;
+ attr->timeout = qp->timeout;
+ attr->retry_cnt = qp->s_retry_cnt;
+ attr->rnr_retry = qp->s_rnr_retry_cnt;
+ attr->alt_port_num = qp->alt_ah_attr.port_num;
+ attr->alt_timeout = qp->alt_timeout;
+
+ init_attr->event_handler = qp->ibqp.event_handler;
+ init_attr->qp_context = qp->ibqp.qp_context;
+ init_attr->send_cq = qp->ibqp.send_cq;
+ init_attr->recv_cq = qp->ibqp.recv_cq;
+ init_attr->srq = qp->ibqp.srq;
+ init_attr->cap = attr->cap;
+ if (qp->s_flags & HFI1_S_SIGNAL_REQ_WR)
+ init_attr->sq_sig_type = IB_SIGNAL_REQ_WR;
+ else
+ init_attr->sq_sig_type = IB_SIGNAL_ALL_WR;
+ init_attr->qp_type = qp->ibqp.qp_type;
+ init_attr->port_num = qp->port_num;
+ return 0;
+}
+
+/**
+ * hfi1_compute_aeth - compute the AETH (syndrome + MSN)
+ * @qp: the queue pair to compute the AETH for
+ *
+ * Returns the AETH.
+ */
+__be32 hfi1_compute_aeth(struct hfi1_qp *qp)
+{
+ u32 aeth = qp->r_msn & HFI1_MSN_MASK;
+
+ if (qp->ibqp.srq) {
+ /*
+ * Shared receive queues don't generate credits.
+ * Set the credit field to the invalid value.
+ */
+ aeth |= HFI1_AETH_CREDIT_INVAL << HFI1_AETH_CREDIT_SHIFT;
+ } else {
+ u32 min, max, x;
+ u32 credits;
+ struct hfi1_rwq *wq = qp->r_rq.wq;
+ u32 head;
+ u32 tail;
+
+ /* sanity check pointers before trusting them */
+ head = wq->head;
+ if (head >= qp->r_rq.size)
+ head = 0;
+ tail = wq->tail;
+ if (tail >= qp->r_rq.size)
+ tail = 0;
+ /*
+ * Compute the number of credits available (RWQEs).
+ * There is a small chance that the pair of reads are
+ * not atomic, which is OK, since the fuzziness is
+ * resolved as further ACKs go out.
+ */
+ credits = head - tail;
+ if ((int)credits < 0)
+ credits += qp->r_rq.size;
+ /*
+ * Binary search the credit table to find the code to
+ * use.
+ */
+ min = 0;
+ max = 31;
+ for (;;) {
+ x = (min + max) / 2;
+ if (credit_table[x] == credits)
+ break;
+ if (credit_table[x] > credits)
+ max = x;
+ else if (min == x)
+ break;
+ else
+ min = x;
+ }
+ aeth |= x << HFI1_AETH_CREDIT_SHIFT;
+ }
+ return cpu_to_be32(aeth);
+}
+
+/**
+ * hfi1_create_qp - create a queue pair for a device
+ * @ibpd: the protection domain who's device we create the queue pair for
+ * @init_attr: the attributes of the queue pair
+ * @udata: user data for libibverbs.so
+ *
+ * Returns the queue pair on success, otherwise returns an errno.
+ *
+ * Called by the ib_create_qp() core verbs function.
+ */
+struct ib_qp *hfi1_create_qp(struct ib_pd *ibpd,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata)
+{
+ struct hfi1_qp *qp;
+ int err;
+ struct hfi1_swqe *swq = NULL;
+ struct hfi1_ibdev *dev;
+ struct hfi1_devdata *dd;
+ size_t sz;
+ size_t sg_list_sz;
+ struct ib_qp *ret;
+
+ if (init_attr->cap.max_send_sge > hfi1_max_sges ||
+ init_attr->cap.max_send_wr > hfi1_max_qp_wrs ||
+ init_attr->create_flags) {
+ ret = ERR_PTR(-EINVAL);
+ goto bail;
+ }
+
+ /* Check receive queue parameters if no SRQ is specified. */
+ if (!init_attr->srq) {
+ if (init_attr->cap.max_recv_sge > hfi1_max_sges ||
+ init_attr->cap.max_recv_wr > hfi1_max_qp_wrs) {
+ ret = ERR_PTR(-EINVAL);
+ goto bail;
+ }
+ if (init_attr->cap.max_send_sge +
+ init_attr->cap.max_send_wr +
+ init_attr->cap.max_recv_sge +
+ init_attr->cap.max_recv_wr == 0) {
+ ret = ERR_PTR(-EINVAL);
+ goto bail;
+ }
+ }
+
+ switch (init_attr->qp_type) {
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
+ if (init_attr->port_num == 0 ||
+ init_attr->port_num > ibpd->device->phys_port_cnt) {
+ ret = ERR_PTR(-EINVAL);
+ goto bail;
+ }
+ case IB_QPT_UC:
+ case IB_QPT_RC:
+ case IB_QPT_UD:
+ sz = sizeof(struct hfi1_sge) *
+ init_attr->cap.max_send_sge +
+ sizeof(struct hfi1_swqe);
+ swq = vmalloc((init_attr->cap.max_send_wr + 1) * sz);
+ if (swq == NULL) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+ sz = sizeof(*qp);
+ sg_list_sz = 0;
+ if (init_attr->srq) {
+ struct hfi1_srq *srq = to_isrq(init_attr->srq);
+
+ if (srq->rq.max_sge > 1)
+ sg_list_sz = sizeof(*qp->r_sg_list) *
+ (srq->rq.max_sge - 1);
+ } else if (init_attr->cap.max_recv_sge > 1)
+ sg_list_sz = sizeof(*qp->r_sg_list) *
+ (init_attr->cap.max_recv_sge - 1);
+ qp = kzalloc(sz + sg_list_sz, GFP_KERNEL);
+ if (!qp) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_swq;
+ }
+ RCU_INIT_POINTER(qp->next, NULL);
+ qp->s_hdr = kzalloc(sizeof(*qp->s_hdr), GFP_KERNEL);
+ if (!qp->s_hdr) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_qp;
+ }
+ qp->timeout_jiffies =
+ usecs_to_jiffies((4096UL * (1UL << qp->timeout)) /
+ 1000UL);
+ if (init_attr->srq)
+ sz = 0;
+ else {
+ qp->r_rq.size = init_attr->cap.max_recv_wr + 1;
+ qp->r_rq.max_sge = init_attr->cap.max_recv_sge;
+ sz = (sizeof(struct ib_sge) * qp->r_rq.max_sge) +
+ sizeof(struct hfi1_rwqe);
+ qp->r_rq.wq = vmalloc_user(sizeof(struct hfi1_rwq) +
+ qp->r_rq.size * sz);
+ if (!qp->r_rq.wq) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_qp;
+ }
+ }
+
+ /*
+ * ib_create_qp() will initialize qp->ibqp
+ * except for qp->ibqp.qp_num.
+ */
+ spin_lock_init(&qp->r_lock);
+ spin_lock_init(&qp->s_lock);
+ spin_lock_init(&qp->r_rq.lock);
+ atomic_set(&qp->refcount, 0);
+ init_waitqueue_head(&qp->wait);
+ init_timer(&qp->s_timer);
+ qp->s_timer.data = (unsigned long)qp;
+ INIT_LIST_HEAD(&qp->rspwait);
+ qp->state = IB_QPS_RESET;
+ qp->s_wq = swq;
+ qp->s_size = init_attr->cap.max_send_wr + 1;
+ qp->s_max_sge = init_attr->cap.max_send_sge;
+ if (init_attr->sq_sig_type == IB_SIGNAL_REQ_WR)
+ qp->s_flags = HFI1_S_SIGNAL_REQ_WR;
+ dev = to_idev(ibpd->device);
+ dd = dd_from_dev(dev);
+ err = alloc_qpn(dd, &dev->qp_dev->qpn_table, init_attr->qp_type,
+ init_attr->port_num);
+ if (err < 0) {
+ ret = ERR_PTR(err);
+ vfree(qp->r_rq.wq);
+ goto bail_qp;
+ }
+ qp->ibqp.qp_num = err;
+ qp->port_num = init_attr->port_num;
+ reset_qp(qp, init_attr->qp_type);
+
+ break;
+
+ default:
+ /* Don't support raw QPs */
+ ret = ERR_PTR(-ENOSYS);
+ goto bail;
+ }
+
+ init_attr->cap.max_inline_data = 0;
+
+ /*
+ * Return the address of the RWQ as the offset to mmap.
+ * See hfi1_mmap() for details.
+ */
+ if (udata && udata->outlen >= sizeof(__u64)) {
+ if (!qp->r_rq.wq) {
+ __u64 offset = 0;
+
+ err = ib_copy_to_udata(udata, &offset,
+ sizeof(offset));
+ if (err) {
+ ret = ERR_PTR(err);
+ goto bail_ip;
+ }
+ } else {
+ u32 s = sizeof(struct hfi1_rwq) + qp->r_rq.size * sz;
+
+ qp->ip = hfi1_create_mmap_info(dev, s,
+ ibpd->uobject->context,
+ qp->r_rq.wq);
+ if (!qp->ip) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_ip;
+ }
+
+ err = ib_copy_to_udata(udata, &(qp->ip->offset),
+ sizeof(qp->ip->offset));
+ if (err) {
+ ret = ERR_PTR(err);
+ goto bail_ip;
+ }
+ }
+ }
+
+ spin_lock(&dev->n_qps_lock);
+ if (dev->n_qps_allocated == hfi1_max_qps) {
+ spin_unlock(&dev->n_qps_lock);
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_ip;
+ }
+
+ dev->n_qps_allocated++;
+ spin_unlock(&dev->n_qps_lock);
+
+ if (qp->ip) {
+ spin_lock_irq(&dev->pending_lock);
+ list_add(&qp->ip->pending_mmaps, &dev->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+ }
+
+ ret = &qp->ibqp;
+
+ /*
+ * We have our QP and its good, now keep track of what types of opcodes
+ * can be processed on this QP. We do this by keeping track of what the
+ * 3 high order bits of the opcode are.
+ */
+ switch (init_attr->qp_type) {
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
+ case IB_QPT_UD:
+ qp->allowed_ops = IB_OPCODE_UD_SEND_ONLY & OPCODE_QP_MASK;
+ break;
+ case IB_QPT_RC:
+ qp->allowed_ops = IB_OPCODE_RC_SEND_ONLY & OPCODE_QP_MASK;
+ break;
+ case IB_QPT_UC:
+ qp->allowed_ops = IB_OPCODE_UC_SEND_ONLY & OPCODE_QP_MASK;
+ break;
+ default:
+ ret = ERR_PTR(-EINVAL);
+ goto bail_ip;
+ }
+
+ goto bail;
+
+bail_ip:
+ if (qp->ip)
+ kref_put(&qp->ip->ref, hfi1_release_mmap_info);
+ else
+ vfree(qp->r_rq.wq);
+ free_qpn(&dev->qp_dev->qpn_table, qp->ibqp.qp_num);
+bail_qp:
+ kfree(qp->s_hdr);
+ kfree(qp);
+bail_swq:
+ vfree(swq);
+bail:
+ return ret;
+}
+
+/**
+ * hfi1_destroy_qp - destroy a queue pair
+ * @ibqp: the queue pair to destroy
+ *
+ * Returns 0 on success.
+ *
+ * Note that this can be called while the QP is actively sending or
+ * receiving!
+ */
+int hfi1_destroy_qp(struct ib_qp *ibqp)
+{
+ struct hfi1_qp *qp = to_iqp(ibqp);
+ struct hfi1_ibdev *dev = to_idev(ibqp->device);
+
+ /* Make sure HW and driver activity is stopped. */
+ spin_lock_irq(&qp->r_lock);
+ spin_lock(&qp->s_lock);
+ if (qp->state != IB_QPS_RESET) {
+ qp->state = IB_QPS_RESET;
+ flush_iowait(qp);
+ qp->s_flags &= ~(HFI1_S_TIMER | HFI1_S_ANY_WAIT);
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irq(&qp->r_lock);
+ cancel_work_sync(&qp->s_iowait.iowork);
+ del_timer_sync(&qp->s_timer);
+ iowait_sdma_drain(&qp->s_iowait);
+ flush_tx_list(qp);
+ remove_qp(dev, qp);
+ wait_event(qp->wait, !atomic_read(&qp->refcount));
+ spin_lock_irq(&qp->r_lock);
+ spin_lock(&qp->s_lock);
+ clear_mr_refs(qp, 1);
+ clear_ahg(qp);
+ }
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irq(&qp->r_lock);
+
+ /* all user's cleaned up, mark it available */
+ free_qpn(&dev->qp_dev->qpn_table, qp->ibqp.qp_num);
+ spin_lock(&dev->n_qps_lock);
+ dev->n_qps_allocated--;
+ spin_unlock(&dev->n_qps_lock);
+
+ if (qp->ip)
+ kref_put(&qp->ip->ref, hfi1_release_mmap_info);
+ else
+ vfree(qp->r_rq.wq);
+ vfree(qp->s_wq);
+ kfree(qp->s_hdr);
+ kfree(qp);
+ return 0;
+}
+
+/**
+ * init_qpn_table - initialize the QP number table for a device
+ * @qpt: the QPN table
+ */
+static int init_qpn_table(struct hfi1_devdata *dd, struct hfi1_qpn_table *qpt)
+{
+ u32 offset, qpn, i;
+ struct qpn_map *map;
+ int ret = 0;
+
+ spin_lock_init(&qpt->lock);
+
+ qpt->last = 0;
+ qpt->incr = 1 << dd->qos_shift;
+
+ /* insure we don't assign QPs from KDETH 64K window */
+ qpn = kdeth_qp << 16;
+ qpt->nmaps = qpn / BITS_PER_PAGE;
+ /* This should always be zero */
+ offset = qpn & BITS_PER_PAGE_MASK;
+ map = &qpt->map[qpt->nmaps];
+ dd_dev_info(dd, "Reserving QPNs for KDETH window from 0x%x to 0x%x\n",
+ qpn, qpn + 65535);
+ for (i = 0; i < 65536; i++) {
+ if (!map->page) {
+ get_map_page(qpt, map);
+ if (!map->page) {
+ ret = -ENOMEM;
+ break;
+ }
+ }
+ set_bit(offset, map->page);
+ offset++;
+ if (offset == BITS_PER_PAGE) {
+ /* next page */
+ qpt->nmaps++;
+ map++;
+ offset = 0;
+ }
+ }
+ return ret;
+}
+
+/**
+ * free_qpn_table - free the QP number table for a device
+ * @qpt: the QPN table
+ */
+static void free_qpn_table(struct hfi1_qpn_table *qpt)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(qpt->map); i++)
+ free_page((unsigned long) qpt->map[i].page);
+}
+
+/**
+ * hfi1_get_credit - flush the send work queue of a QP
+ * @qp: the qp who's send work queue to flush
+ * @aeth: the Acknowledge Extended Transport Header
+ *
+ * The QP s_lock should be held.
+ */
+void hfi1_get_credit(struct hfi1_qp *qp, u32 aeth)
+{
+ u32 credit = (aeth >> HFI1_AETH_CREDIT_SHIFT) & HFI1_AETH_CREDIT_MASK;
+
+ /*
+ * If the credit is invalid, we can send
+ * as many packets as we like. Otherwise, we have to
+ * honor the credit field.
+ */
+ if (credit == HFI1_AETH_CREDIT_INVAL) {
+ if (!(qp->s_flags & HFI1_S_UNLIMITED_CREDIT)) {
+ qp->s_flags |= HFI1_S_UNLIMITED_CREDIT;
+ if (qp->s_flags & HFI1_S_WAIT_SSN_CREDIT) {
+ qp->s_flags &= ~HFI1_S_WAIT_SSN_CREDIT;
+ hfi1_schedule_send(qp);
+ }
+ }
+ } else if (!(qp->s_flags & HFI1_S_UNLIMITED_CREDIT)) {
+ /* Compute new LSN (i.e., MSN + credit) */
+ credit = (aeth + credit_table[credit]) & HFI1_MSN_MASK;
+ if (cmp_msn(credit, qp->s_lsn) > 0) {
+ qp->s_lsn = credit;
+ if (qp->s_flags & HFI1_S_WAIT_SSN_CREDIT) {
+ qp->s_flags &= ~HFI1_S_WAIT_SSN_CREDIT;
+ hfi1_schedule_send(qp);
+ }
+ }
+ }
+}
+
+void hfi1_qp_wakeup(struct hfi1_qp *qp, u32 flag)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (qp->s_flags & flag) {
+ qp->s_flags &= ~flag;
+ trace_hfi1_qpwakeup(qp, flag);
+ hfi1_schedule_send(qp);
+ }
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ /* Notify hfi1_destroy_qp() if it is waiting. */
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+}
+
+static int iowait_sleep(
+ struct sdma_engine *sde,
+ struct iowait *wait,
+ struct sdma_txreq *stx,
+ unsigned seq)
+{
+ struct verbs_txreq *tx = container_of(stx, struct verbs_txreq, txreq);
+ struct hfi1_qp *qp;
+ unsigned long flags;
+ int ret = 0;
+ struct hfi1_ibdev *dev;
+
+ qp = tx->qp;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK) {
+
+ /*
+ * If we couldn't queue the DMA request, save the info
+ * and try again later rather than destroying the
+ * buffer and undoing the side effects of the copy.
+ */
+ /* Make a common routine? */
+ dev = &sde->dd->verbs_dev;
+ list_add_tail(&stx->list, &wait->tx_head);
+ write_seqlock(&dev->iowait_lock);
+ if (sdma_progress(sde, seq, stx))
+ goto eagain;
+ if (list_empty(&qp->s_iowait.list)) {
+ struct hfi1_ibport *ibp =
+ to_iport(qp->ibqp.device, qp->port_num);
+
+ ibp->n_dmawait++;
+ qp->s_flags |= HFI1_S_WAIT_DMA_DESC;
+ list_add_tail(&qp->s_iowait.list, &sde->dmawait);
+ trace_hfi1_qpsleep(qp, HFI1_S_WAIT_DMA_DESC);
+ atomic_inc(&qp->refcount);
+ }
+ write_sequnlock(&dev->iowait_lock);
+ qp->s_flags &= ~HFI1_S_BUSY;
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ ret = -EBUSY;
+ } else {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ hfi1_put_txreq(tx);
+ }
+ return ret;
+eagain:
+ write_sequnlock(&dev->iowait_lock);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ list_del_init(&stx->list);
+ return -EAGAIN;
+}
+
+static void iowait_wakeup(struct iowait *wait, int reason)
+{
+ struct hfi1_qp *qp = container_of(wait, struct hfi1_qp, s_iowait);
+
+ WARN_ON(reason != SDMA_AVAIL_REASON);
+ hfi1_qp_wakeup(qp, HFI1_S_WAIT_DMA_DESC);
+}
+
+int hfi1_qp_init(struct hfi1_ibdev *dev)
+{
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+ int i;
+ int ret = -ENOMEM;
+
+ /* allocate parent object */
+ dev->qp_dev = kzalloc(sizeof(*dev->qp_dev), GFP_KERNEL);
+ if (!dev->qp_dev)
+ goto nomem;
+ /* allocate hash table */
+ dev->qp_dev->qp_table_size = hfi1_qp_table_size;
+ dev->qp_dev->qp_table_bits = ilog2(hfi1_qp_table_size);
+ dev->qp_dev->qp_table =
+ kmalloc(dev->qp_dev->qp_table_size *
+ sizeof(*dev->qp_dev->qp_table),
+ GFP_KERNEL);
+ if (!dev->qp_dev->qp_table)
+ goto nomem;
+ for (i = 0; i < dev->qp_dev->qp_table_size; i++)
+ RCU_INIT_POINTER(dev->qp_dev->qp_table[i], NULL);
+ spin_lock_init(&dev->qp_dev->qpt_lock);
+ /* initialize qpn map */
+ ret = init_qpn_table(dd, &dev->qp_dev->qpn_table);
+ if (ret)
+ goto nomem;
+ return ret;
+nomem:
+ if (dev->qp_dev) {
+ kfree(dev->qp_dev->qp_table);
+ free_qpn_table(&dev->qp_dev->qpn_table);
+ kfree(dev->qp_dev);
+ }
+ return ret;
+}
+
+void hfi1_qp_exit(struct hfi1_ibdev *dev)
+{
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+ u32 qps_inuse;
+
+ qps_inuse = free_all_qps(dd);
+ if (qps_inuse)
+ dd_dev_err(dd, "QP memory leak! %u still in use\n",
+ qps_inuse);
+ if (dev->qp_dev) {
+ kfree(dev->qp_dev->qp_table);
+ free_qpn_table(&dev->qp_dev->qpn_table);
+ kfree(dev->qp_dev);
+ }
+}
+
+/**
+ *
+ * qp_to_sdma_engine - map a qp to a send engine
+ * @qp: the QP
+ * @sc5: the 5 bit sc
+ *
+ * Return:
+ * A send engine for the qp or NULL for SMI type qp.
+ */
+struct sdma_engine *qp_to_sdma_engine(struct hfi1_qp *qp, u8 sc5)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
+ struct sdma_engine *sde;
+
+ if (!(dd->flags & HFI1_HAS_SEND_DMA))
+ return NULL;
+ switch (qp->ibqp.qp_type) {
+ case IB_QPT_UC:
+ case IB_QPT_RC:
+ break;
+ case IB_QPT_SMI:
+ return NULL;
+ default:
+ break;
+ }
+ sde = sdma_select_engine_sc(dd, qp->ibqp.qp_num >> dd->qos_shift, sc5);
+ return sde;
+}
+
+struct qp_iter {
+ struct hfi1_ibdev *dev;
+ struct hfi1_qp *qp;
+ int specials;
+ int n;
+};
+
+struct qp_iter *qp_iter_init(struct hfi1_ibdev *dev)
+{
+ struct qp_iter *iter;
+
+ iter = kzalloc(sizeof(*iter), GFP_KERNEL);
+ if (!iter)
+ return NULL;
+
+ iter->dev = dev;
+ iter->specials = dev->ibdev.phys_port_cnt * 2;
+ if (qp_iter_next(iter)) {
+ kfree(iter);
+ return NULL;
+ }
+
+ return iter;
+}
+
+int qp_iter_next(struct qp_iter *iter)
+{
+ struct hfi1_ibdev *dev = iter->dev;
+ int n = iter->n;
+ int ret = 1;
+ struct hfi1_qp *pqp = iter->qp;
+ struct hfi1_qp *qp;
+
+ /*
+ * The approach is to consider the special qps
+ * as an additional table entries before the
+ * real hash table. Since the qp code sets
+ * the qp->next hash link to NULL, this works just fine.
+ *
+ * iter->specials is 2 * # ports
+ *
+ * n = 0..iter->specials is the special qp indices
+ *
+ * n = iter->specials..dev->qp_dev->qp_table_size+iter->specials are
+ * the potential hash bucket entries
+ *
+ */
+ for (; n < dev->qp_dev->qp_table_size + iter->specials; n++) {
+ if (pqp) {
+ qp = rcu_dereference(pqp->next);
+ } else {
+ if (n < iter->specials) {
+ struct hfi1_pportdata *ppd;
+ struct hfi1_ibport *ibp;
+ int pidx;
+
+ pidx = n % dev->ibdev.phys_port_cnt;
+ ppd = &dd_from_dev(dev)->pport[pidx];
+ ibp = &ppd->ibport_data;
+
+ if (!(n & 1))
+ qp = rcu_dereference(ibp->qp[0]);
+ else
+ qp = rcu_dereference(ibp->qp[1]);
+ } else {
+ qp = rcu_dereference(
+ dev->qp_dev->qp_table[
+ (n - iter->specials)]);
+ }
+ }
+ pqp = qp;
+ if (qp) {
+ iter->qp = qp;
+ iter->n = n;
+ return 0;
+ }
+ }
+ return ret;
+}
+
+static const char * const qp_type_str[] = {
+ "SMI", "GSI", "RC", "UC", "UD",
+};
+
+static int qp_idle(struct hfi1_qp *qp)
+{
+ return
+ qp->s_last == qp->s_acked &&
+ qp->s_acked == qp->s_cur &&
+ qp->s_cur == qp->s_tail &&
+ qp->s_tail == qp->s_head;
+}
+
+void qp_iter_print(struct seq_file *s, struct qp_iter *iter)
+{
+ struct hfi1_swqe *wqe;
+ struct hfi1_qp *qp = iter->qp;
+ struct sdma_engine *sde;
+
+ sde = qp_to_sdma_engine(qp, qp->s_sc);
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ seq_printf(s,
+ "N %d %s QP%u R %u %s %u %u %u f=%x %u %u %u %u %u PSN %x %x %x %x %x (%u %u %u %u %u %u) QP%u LID %x SL %u MTU %d %u %u %u SDE %p,%u\n",
+ iter->n,
+ qp_idle(qp) ? "I" : "B",
+ qp->ibqp.qp_num,
+ atomic_read(&qp->refcount),
+ qp_type_str[qp->ibqp.qp_type],
+ qp->state,
+ wqe ? wqe->wr.opcode : 0,
+ qp->s_hdrwords,
+ qp->s_flags,
+ atomic_read(&qp->s_iowait.sdma_busy),
+ !list_empty(&qp->s_iowait.list),
+ qp->timeout,
+ wqe ? wqe->ssn : 0,
+ qp->s_lsn,
+ qp->s_last_psn,
+ qp->s_psn, qp->s_next_psn,
+ qp->s_sending_psn, qp->s_sending_hpsn,
+ qp->s_last, qp->s_acked, qp->s_cur,
+ qp->s_tail, qp->s_head, qp->s_size,
+ qp->remote_qpn,
+ qp->remote_ah_attr.dlid,
+ qp->remote_ah_attr.sl,
+ qp->pmtu,
+ qp->s_retry_cnt,
+ qp->timeout,
+ qp->s_rnr_retry_cnt,
+ sde,
+ sde ? sde->this_idx : 0);
+}
+
+void qp_comm_est(struct hfi1_qp *qp)
+{
+ qp->r_flags |= HFI1_R_COMM_EST;
+ if (qp->ibqp.event_handler) {
+ struct ib_event ev;
+
+ ev.device = qp->ibqp.device;
+ ev.element.qp = &qp->ibqp;
+ ev.event = IB_EVENT_COMM_EST;
+ qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
+ }
+}
diff --git a/drivers/staging/rdma/hfi1/qp.h b/drivers/staging/rdma/hfi1/qp.h
new file mode 100644
index 0000000..6b50585
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/qp.h
@@ -0,0 +1,235 @@
+#ifndef _QP_H
+#define _QP_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/hash.h>
+#include "verbs.h"
+
+#define QPN_MAX (1 << 24)
+#define QPNMAP_ENTRIES (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)
+
+/*
+ * QPN-map pages start out as NULL, they get allocated upon
+ * first use and are never deallocated. This way,
+ * large bitmaps are not allocated unless large numbers of QPs are used.
+ */
+struct qpn_map {
+ void *page;
+};
+
+struct hfi1_qpn_table {
+ spinlock_t lock; /* protect changes in this struct */
+ unsigned flags; /* flags for QP0/1 allocated for each port */
+ u32 last; /* last QP number allocated */
+ u32 nmaps; /* size of the map table */
+ u16 limit;
+ u8 incr;
+ /* bit map of free QP numbers other than 0/1 */
+ struct qpn_map map[QPNMAP_ENTRIES];
+};
+
+struct hfi1_qp_ibdev {
+ u32 qp_table_size;
+ u32 qp_table_bits;
+ struct hfi1_qp __rcu **qp_table;
+ spinlock_t qpt_lock;
+ struct hfi1_qpn_table qpn_table;
+};
+
+static inline u32 qpn_hash(struct hfi1_qp_ibdev *dev, u32 qpn)
+{
+ return hash_32(qpn, dev->qp_table_bits);
+}
+
+/**
+ * hfi1_lookup_qpn - return the QP with the given QPN
+ * @ibp: the ibport
+ * @qpn: the QP number to look up
+ *
+ * The caller must hold the rcu_read_lock(), and keep the lock until
+ * the returned qp is no longer in use.
+ */
+static inline struct hfi1_qp *hfi1_lookup_qpn(struct hfi1_ibport *ibp,
+ u32 qpn) __must_hold(RCU)
+{
+ struct hfi1_qp *qp = NULL;
+
+ if (unlikely(qpn <= 1)) {
+ qp = rcu_dereference(ibp->qp[qpn]);
+ } else {
+ struct hfi1_ibdev *dev = &ppd_from_ibp(ibp)->dd->verbs_dev;
+ u32 n = qpn_hash(dev->qp_dev, qpn);
+
+ for (qp = rcu_dereference(dev->qp_dev->qp_table[n]); qp;
+ qp = rcu_dereference(qp->next))
+ if (qp->ibqp.qp_num == qpn)
+ break;
+ }
+ return qp;
+}
+
+/**
+ * hfi1_error_qp - put a QP into the error state
+ * @qp: the QP to put into the error state
+ * @err: the receive completion error to signal if a RWQE is active
+ *
+ * Flushes both send and receive work queues.
+ * Returns true if last WQE event should be generated.
+ * The QP r_lock and s_lock should be held and interrupts disabled.
+ * If we are already in error state, just return.
+ */
+int hfi1_error_qp(struct hfi1_qp *qp, enum ib_wc_status err);
+
+/**
+ * hfi1_modify_qp - modify the attributes of a queue pair
+ * @ibqp: the queue pair who's attributes we're modifying
+ * @attr: the new attributes
+ * @attr_mask: the mask of attributes to modify
+ * @udata: user data for libibverbs.so
+ *
+ * Returns 0 on success, otherwise returns an errno.
+ */
+int hfi1_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_udata *udata);
+
+int hfi1_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_qp_init_attr *init_attr);
+
+/**
+ * hfi1_compute_aeth - compute the AETH (syndrome + MSN)
+ * @qp: the queue pair to compute the AETH for
+ *
+ * Returns the AETH.
+ */
+__be32 hfi1_compute_aeth(struct hfi1_qp *qp);
+
+/**
+ * hfi1_create_qp - create a queue pair for a device
+ * @ibpd: the protection domain who's device we create the queue pair for
+ * @init_attr: the attributes of the queue pair
+ * @udata: user data for libibverbs.so
+ *
+ * Returns the queue pair on success, otherwise returns an errno.
+ *
+ * Called by the ib_create_qp() core verbs function.
+ */
+struct ib_qp *hfi1_create_qp(struct ib_pd *ibpd,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata);
+/**
+ * hfi1_destroy_qp - destroy a queue pair
+ * @ibqp: the queue pair to destroy
+ *
+ * Returns 0 on success.
+ *
+ * Note that this can be called while the QP is actively sending or
+ * receiving!
+ */
+int hfi1_destroy_qp(struct ib_qp *ibqp);
+
+/**
+ * hfi1_get_credit - flush the send work queue of a QP
+ * @qp: the qp who's send work queue to flush
+ * @aeth: the Acknowledge Extended Transport Header
+ *
+ * The QP s_lock should be held.
+ */
+void hfi1_get_credit(struct hfi1_qp *qp, u32 aeth);
+
+/**
+ * hfi1_qp_init - allocate QP tables
+ * @dev: a pointer to the hfi1_ibdev
+ */
+int hfi1_qp_init(struct hfi1_ibdev *dev);
+
+/**
+ * hfi1_qp_exit - free the QP related structures
+ * @dev: a pointer to the hfi1_ibdev
+ */
+void hfi1_qp_exit(struct hfi1_ibdev *dev);
+
+/**
+ * hfi1_qp_waitup - wake up on the indicated event
+ * @qp: the QP
+ * @flag: flag the qp on which the qp is stalled
+ */
+void hfi1_qp_wakeup(struct hfi1_qp *qp, u32 flag);
+
+struct sdma_engine *qp_to_sdma_engine(struct hfi1_qp *qp, u8 sc5);
+
+struct qp_iter;
+
+/**
+ * qp_iter_init - wake up on the indicated event
+ * @dev: the hfi1_ibdev
+ */
+struct qp_iter *qp_iter_init(struct hfi1_ibdev *dev);
+
+/**
+ * qp_iter_next - wakeup on the indicated event
+ * @iter: the iterator for the qp hash list
+ */
+int qp_iter_next(struct qp_iter *iter);
+
+/**
+ * qp_iter_next - wake up on the indicated event
+ * @s: the seq_file to emit the qp information on
+ * @iter: the iterator for the qp hash list
+ */
+void qp_iter_print(struct seq_file *s, struct qp_iter *iter);
+
+/**
+ * qp_comm_est - handle trap with QP established
+ * @qp: the QP
+ */
+void qp_comm_est(struct hfi1_qp *qp);
+
+#endif /* _QP_H */
diff --git a/drivers/staging/rdma/hfi1/qsfp.c b/drivers/staging/rdma/hfi1/qsfp.c
new file mode 100644
index 0000000..3138936
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/qsfp.c
@@ -0,0 +1,546 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/vmalloc.h>
+
+#include "hfi.h"
+#include "twsi.h"
+
+/*
+ * QSFP support for hfi driver, using "Two Wire Serial Interface" driver
+ * in twsi.c
+ */
+#define I2C_MAX_RETRY 4
+
+/*
+ * Unlocked i2c write. Must hold dd->qsfp_i2c_mutex.
+ */
+static int __i2c_write(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
+ int offset, void *bp, int len)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ int ret, cnt;
+ u8 *buff = bp;
+
+ /* Make sure TWSI bus is in sane state. */
+ ret = hfi1_twsi_reset(dd, target);
+ if (ret) {
+ hfi1_dev_porterr(dd, ppd->port,
+ "I2C interface Reset for write failed\n");
+ return -EIO;
+ }
+
+ cnt = 0;
+ while (cnt < len) {
+ int wlen = len - cnt;
+
+ ret = hfi1_twsi_blk_wr(dd, target, i2c_addr, offset,
+ buff + cnt, wlen);
+ if (ret) {
+ /* hfi1_twsi_blk_wr() 1 for error, else 0 */
+ return -EIO;
+ }
+ offset += wlen;
+ cnt += wlen;
+ }
+
+ /* Must wait min 20us between qsfp i2c transactions */
+ udelay(20);
+
+ return cnt;
+}
+
+int i2c_write(struct hfi1_pportdata *ppd, u32 target, int i2c_addr, int offset,
+ void *bp, int len)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ int ret;
+
+ ret = mutex_lock_interruptible(&dd->qsfp_i2c_mutex);
+ if (!ret) {
+ ret = __i2c_write(ppd, target, i2c_addr, offset, bp, len);
+ mutex_unlock(&dd->qsfp_i2c_mutex);
+ }
+
+ return ret;
+}
+
+/*
+ * Unlocked i2c read. Must hold dd->qsfp_i2c_mutex.
+ */
+static int __i2c_read(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
+ int offset, void *bp, int len)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ int ret, cnt, pass = 0;
+ int stuck = 0;
+ u8 *buff = bp;
+
+ /* Make sure TWSI bus is in sane state. */
+ ret = hfi1_twsi_reset(dd, target);
+ if (ret) {
+ hfi1_dev_porterr(dd, ppd->port,
+ "I2C interface Reset for read failed\n");
+ ret = -EIO;
+ stuck = 1;
+ goto exit;
+ }
+
+ cnt = 0;
+ while (cnt < len) {
+ int rlen = len - cnt;
+
+ ret = hfi1_twsi_blk_rd(dd, target, i2c_addr, offset,
+ buff + cnt, rlen);
+ /* Some QSFP's fail first try. Retry as experiment */
+ if (ret && cnt == 0 && ++pass < I2C_MAX_RETRY)
+ continue;
+ if (ret) {
+ /* hfi1_twsi_blk_rd() 1 for error, else 0 */
+ ret = -EIO;
+ goto exit;
+ }
+ offset += rlen;
+ cnt += rlen;
+ }
+
+ ret = cnt;
+
+exit:
+ if (stuck)
+ dd_dev_err(dd, "I2C interface bus stuck non-idle\n");
+
+ if (pass >= I2C_MAX_RETRY && ret)
+ hfi1_dev_porterr(dd, ppd->port,
+ "I2C failed even retrying\n");
+ else if (pass)
+ hfi1_dev_porterr(dd, ppd->port, "I2C retries: %d\n", pass);
+
+ /* Must wait min 20us between qsfp i2c transactions */
+ udelay(20);
+
+ return ret;
+}
+
+int i2c_read(struct hfi1_pportdata *ppd, u32 target, int i2c_addr, int offset,
+ void *bp, int len)
+{
+ struct hfi1_devdata *dd = ppd->dd;
+ int ret;
+
+ ret = mutex_lock_interruptible(&dd->qsfp_i2c_mutex);
+ if (!ret) {
+ ret = __i2c_read(ppd, target, i2c_addr, offset, bp, len);
+ mutex_unlock(&dd->qsfp_i2c_mutex);
+ }
+
+ return ret;
+}
+
+int qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
+ int len)
+{
+ int count = 0;
+ int offset;
+ int nwrite;
+ int ret;
+ u8 page;
+
+ ret = mutex_lock_interruptible(&ppd->dd->qsfp_i2c_mutex);
+ if (ret)
+ return ret;
+
+ while (count < len) {
+ /*
+ * Set the qsfp page based on a zero-based addresss
+ * and a page size of QSFP_PAGESIZE bytes.
+ */
+ page = (u8)(addr / QSFP_PAGESIZE);
+
+ ret = __i2c_write(ppd, target, QSFP_DEV,
+ QSFP_PAGE_SELECT_BYTE_OFFS, &page, 1);
+ if (ret != 1) {
+ hfi1_dev_porterr(
+ ppd->dd,
+ ppd->port,
+ "can't write QSFP_PAGE_SELECT_BYTE: %d\n", ret);
+ ret = -EIO;
+ break;
+ }
+
+ /* truncate write to end of page if crossing page boundary */
+ offset = addr % QSFP_PAGESIZE;
+ nwrite = len - count;
+ if ((offset + nwrite) > QSFP_PAGESIZE)
+ nwrite = QSFP_PAGESIZE - offset;
+
+ ret = __i2c_write(ppd, target, QSFP_DEV, offset, bp + count,
+ nwrite);
+ if (ret <= 0) /* stop on error or nothing read */
+ break;
+
+ count += ret;
+ addr += ret;
+ }
+
+ mutex_unlock(&ppd->dd->qsfp_i2c_mutex);
+
+ if (ret < 0)
+ return ret;
+ return count;
+}
+
+int qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
+ int len)
+{
+ int count = 0;
+ int offset;
+ int nread;
+ int ret;
+ u8 page;
+
+ ret = mutex_lock_interruptible(&ppd->dd->qsfp_i2c_mutex);
+ if (ret)
+ return ret;
+
+ while (count < len) {
+ /*
+ * Set the qsfp page based on a zero-based address
+ * and a page size of QSFP_PAGESIZE bytes.
+ */
+ page = (u8)(addr / QSFP_PAGESIZE);
+ ret = __i2c_write(ppd, target, QSFP_DEV,
+ QSFP_PAGE_SELECT_BYTE_OFFS, &page, 1);
+ if (ret != 1) {
+ hfi1_dev_porterr(
+ ppd->dd,
+ ppd->port,
+ "can't write QSFP_PAGE_SELECT_BYTE: %d\n", ret);
+ ret = -EIO;
+ break;
+ }
+
+ /* truncate read to end of page if crossing page boundary */
+ offset = addr % QSFP_PAGESIZE;
+ nread = len - count;
+ if ((offset + nread) > QSFP_PAGESIZE)
+ nread = QSFP_PAGESIZE - offset;
+
+ ret = __i2c_read(ppd, target, QSFP_DEV, offset, bp + count,
+ nread);
+ if (ret <= 0) /* stop on error or nothing read */
+ break;
+
+ count += ret;
+ addr += ret;
+ }
+
+ mutex_unlock(&ppd->dd->qsfp_i2c_mutex);
+
+ if (ret < 0)
+ return ret;
+ return count;
+}
+
+/*
+ * This function caches the QSFP memory range in 128 byte chunks.
+ * As an example, the next byte after address 255 is byte 128 from
+ * upper page 01H (if existing) rather than byte 0 from lower page 00H.
+ */
+int refresh_qsfp_cache(struct hfi1_pportdata *ppd, struct qsfp_data *cp)
+{
+ u32 target = ppd->dd->hfi1_id;
+ int ret;
+ unsigned long flags;
+ u8 *cache = &cp->cache[0];
+
+ /* ensure sane contents on invalid reads, for cable swaps */
+ memset(cache, 0, (QSFP_MAX_NUM_PAGES*128));
+ dd_dev_info(ppd->dd, "%s: called\n", __func__);
+ if (!qsfp_mod_present(ppd)) {
+ ret = -ENODEV;
+ goto bail;
+ }
+
+ ret = qsfp_read(ppd, target, 0, cache, 256);
+ if (ret != 256) {
+ dd_dev_info(ppd->dd,
+ "%s: Read of pages 00H failed, expected 256, got %d\n",
+ __func__, ret);
+ goto bail;
+ }
+
+ if (cache[0] != 0x0C && cache[0] != 0x0D)
+ goto bail;
+
+ /* Is paging enabled? */
+ if (!(cache[2] & 4)) {
+
+ /* Paging enabled, page 03 required */
+ if ((cache[195] & 0xC0) == 0xC0) {
+ /* all */
+ ret = qsfp_read(ppd, target, 384, cache + 256, 128);
+ if (ret <= 0 || ret != 128) {
+ dd_dev_info(ppd->dd, "%s: failed\n", __func__);
+ goto bail;
+ }
+ ret = qsfp_read(ppd, target, 640, cache + 384, 128);
+ if (ret <= 0 || ret != 128) {
+ dd_dev_info(ppd->dd, "%s: failed\n", __func__);
+ goto bail;
+ }
+ ret = qsfp_read(ppd, target, 896, cache + 512, 128);
+ if (ret <= 0 || ret != 128) {
+ dd_dev_info(ppd->dd, "%s: failed\n", __func__);
+ goto bail;
+ }
+ } else if ((cache[195] & 0x80) == 0x80) {
+ /* only page 2 and 3 */
+ ret = qsfp_read(ppd, target, 640, cache + 384, 128);
+ if (ret <= 0 || ret != 128) {
+ dd_dev_info(ppd->dd, "%s: failed\n", __func__);
+ goto bail;
+ }
+ ret = qsfp_read(ppd, target, 896, cache + 512, 128);
+ if (ret <= 0 || ret != 128) {
+ dd_dev_info(ppd->dd, "%s: failed\n", __func__);
+ goto bail;
+ }
+ } else if ((cache[195] & 0x40) == 0x40) {
+ /* only page 1 and 3 */
+ ret = qsfp_read(ppd, target, 384, cache + 256, 128);
+ if (ret <= 0 || ret != 128) {
+ dd_dev_info(ppd->dd, "%s: failed\n", __func__);
+ goto bail;
+ }
+ ret = qsfp_read(ppd, target, 896, cache + 512, 128);
+ if (ret <= 0 || ret != 128) {
+ dd_dev_info(ppd->dd, "%s: failed\n", __func__);
+ goto bail;
+ }
+ } else {
+ /* only page 3 */
+ ret = qsfp_read(ppd, target, 896, cache + 512, 128);
+ if (ret <= 0 || ret != 128) {
+ dd_dev_info(ppd->dd, "%s: failed\n", __func__);
+ goto bail;
+ }
+ }
+ }
+
+ spin_lock_irqsave(&ppd->qsfp_info.qsfp_lock, flags);
+ ppd->qsfp_info.cache_valid = 1;
+ ppd->qsfp_info.cache_refresh_required = 0;
+ spin_unlock_irqrestore(&ppd->qsfp_info.qsfp_lock, flags);
+
+ return 0;
+
+bail:
+ memset(cache, 0, (QSFP_MAX_NUM_PAGES*128));
+ return ret;
+}
+
+const char * const hfi1_qsfp_devtech[16] = {
+ "850nm VCSEL", "1310nm VCSEL", "1550nm VCSEL", "1310nm FP",
+ "1310nm DFB", "1550nm DFB", "1310nm EML", "1550nm EML",
+ "Cu Misc", "1490nm DFB", "Cu NoEq", "Cu Eq",
+ "Undef", "Cu Active BothEq", "Cu FarEq", "Cu NearEq"
+};
+
+#define QSFP_DUMP_CHUNK 16 /* Holds longest string */
+#define QSFP_DEFAULT_HDR_CNT 224
+
+static const char *pwr_codes = "1.5W2.0W2.5W3.5W";
+
+int qsfp_mod_present(struct hfi1_pportdata *ppd)
+{
+ if (HFI1_CAP_IS_KSET(QSFP_ENABLED)) {
+ struct hfi1_devdata *dd = ppd->dd;
+ u64 reg;
+
+ reg = read_csr(dd,
+ dd->hfi1_id ? ASIC_QSFP2_IN : ASIC_QSFP1_IN);
+ return !(reg & QSFP_HFI0_MODPRST_N);
+ }
+ /* always return cable present */
+ return 1;
+}
+
+/*
+ * This function maps QSFP memory addresses in 128 byte chunks in the following
+ * fashion per the CableInfo SMA query definition in the IBA 1.3 spec/OPA Gen 1
+ * spec
+ * For addr 000-127, lower page 00h
+ * For addr 128-255, upper page 00h
+ * For addr 256-383, upper page 01h
+ * For addr 384-511, upper page 02h
+ * For addr 512-639, upper page 03h
+ *
+ * For addresses beyond this range, it returns the invalid range of data buffer
+ * set to 0.
+ * For upper pages that are optional, if they are not valid, returns the
+ * particular range of bytes in the data buffer set to 0.
+ */
+int get_cable_info(struct hfi1_devdata *dd, u32 port_num, u32 addr, u32 len,
+ u8 *data)
+{
+ struct hfi1_pportdata *ppd;
+ u32 excess_len = 0;
+ int ret = 0;
+
+ if (port_num > dd->num_pports || port_num < 1) {
+ dd_dev_info(dd, "%s: Invalid port number %d\n",
+ __func__, port_num);
+ ret = -EINVAL;
+ goto set_zeroes;
+ }
+
+ ppd = dd->pport + (port_num - 1);
+ if (!qsfp_mod_present(ppd)) {
+ ret = -ENODEV;
+ goto set_zeroes;
+ }
+
+ if (!ppd->qsfp_info.cache_valid) {
+ ret = -EINVAL;
+ goto set_zeroes;
+ }
+
+ if (addr >= (QSFP_MAX_NUM_PAGES * 128)) {
+ ret = -ERANGE;
+ goto set_zeroes;
+ }
+
+ if ((addr + len) > (QSFP_MAX_NUM_PAGES * 128)) {
+ excess_len = (addr + len) - (QSFP_MAX_NUM_PAGES * 128);
+ memcpy(data, &ppd->qsfp_info.cache[addr], (len - excess_len));
+ data += (len - excess_len);
+ goto set_zeroes;
+ }
+
+ memcpy(data, &ppd->qsfp_info.cache[addr], len);
+ return 0;
+
+set_zeroes:
+ memset(data, 0, excess_len);
+ return ret;
+}
+
+int qsfp_dump(struct hfi1_pportdata *ppd, char *buf, int len)
+{
+ u8 *cache = &ppd->qsfp_info.cache[0];
+ u8 bin_buff[QSFP_DUMP_CHUNK];
+ char lenstr[6];
+ int sofar, ret;
+ int bidx = 0;
+ u8 *atten = &cache[QSFP_ATTEN_OFFS];
+ u8 *vendor_oui = &cache[QSFP_VOUI_OFFS];
+
+ sofar = 0;
+ lenstr[0] = ' ';
+ lenstr[1] = '\0';
+
+ if (ppd->qsfp_info.cache_valid) {
+
+ if (QSFP_IS_CU(cache[QSFP_MOD_TECH_OFFS]))
+ sprintf(lenstr, "%dM ", cache[QSFP_MOD_LEN_OFFS]);
+
+ sofar += scnprintf(buf + sofar, len - sofar, "PWR:%.3sW\n",
+ pwr_codes +
+ (QSFP_PWR(cache[QSFP_MOD_PWR_OFFS]) * 4));
+
+ sofar += scnprintf(buf + sofar, len - sofar, "TECH:%s%s\n",
+ lenstr,
+ hfi1_qsfp_devtech[(cache[QSFP_MOD_TECH_OFFS]) >> 4]);
+
+ sofar += scnprintf(buf + sofar, len - sofar, "Vendor:%.*s\n",
+ QSFP_VEND_LEN, &cache[QSFP_VEND_OFFS]);
+
+ sofar += scnprintf(buf + sofar, len - sofar, "OUI:%06X\n",
+ QSFP_OUI(vendor_oui));
+
+ sofar += scnprintf(buf + sofar, len - sofar, "Part#:%.*s\n",
+ QSFP_PN_LEN, &cache[QSFP_PN_OFFS]);
+
+ sofar += scnprintf(buf + sofar, len - sofar, "Rev:%.*s\n",
+ QSFP_REV_LEN, &cache[QSFP_REV_OFFS]);
+
+ if (QSFP_IS_CU(cache[QSFP_MOD_TECH_OFFS]))
+ sofar += scnprintf(buf + sofar, len - sofar,
+ "Atten:%d, %d\n",
+ QSFP_ATTEN_SDR(atten),
+ QSFP_ATTEN_DDR(atten));
+
+ sofar += scnprintf(buf + sofar, len - sofar, "Serial:%.*s\n",
+ QSFP_SN_LEN, &cache[QSFP_SN_OFFS]);
+
+ sofar += scnprintf(buf + sofar, len - sofar, "Date:%.*s\n",
+ QSFP_DATE_LEN, &cache[QSFP_DATE_OFFS]);
+
+ sofar += scnprintf(buf + sofar, len - sofar, "Lot:%.*s\n",
+ QSFP_LOT_LEN, &cache[QSFP_LOT_OFFS]);
+
+ while (bidx < QSFP_DEFAULT_HDR_CNT) {
+ int iidx;
+
+ memcpy(bin_buff, &cache[bidx], QSFP_DUMP_CHUNK);
+ for (iidx = 0; iidx < QSFP_DUMP_CHUNK; ++iidx) {
+ sofar += scnprintf(buf + sofar, len-sofar,
+ " %02X", bin_buff[iidx]);
+ }
+ sofar += scnprintf(buf + sofar, len - sofar, "\n");
+ bidx += QSFP_DUMP_CHUNK;
+ }
+ }
+ ret = sofar;
+ return ret;
+}
diff --git a/drivers/staging/rdma/hfi1/qsfp.h b/drivers/staging/rdma/hfi1/qsfp.h
new file mode 100644
index 0000000..d30c2a6
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/qsfp.h
@@ -0,0 +1,222 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+/* QSFP support common definitions, for hfi driver */
+
+#define QSFP_DEV 0xA0
+#define QSFP_PWR_LAG_MSEC 2000
+#define QSFP_MODPRS_LAG_MSEC 20
+/* 128 byte pages, per SFF 8636 rev 2.4 */
+#define QSFP_MAX_NUM_PAGES 5
+
+/*
+ * Below are masks for QSFP pins. Pins are the same for HFI0 and HFI1.
+ * _N means asserted low
+ */
+#define QSFP_HFI0_I2CCLK (1 << 0)
+#define QSFP_HFI0_I2CDAT (1 << 1)
+#define QSFP_HFI0_RESET_N (1 << 2)
+#define QSFP_HFI0_INT_N (1 << 3)
+#define QSFP_HFI0_MODPRST_N (1 << 4)
+
+/* QSFP is paged at 256 bytes */
+#define QSFP_PAGESIZE 256
+
+/* Defined fields that Intel requires of qualified cables */
+/* Byte 0 is Identifier, not checked */
+/* Byte 1 is reserved "status MSB" */
+/* Byte 2 is "status LSB" We only care that D2 "Flat Mem" is set. */
+/*
+ * Rest of first 128 not used, although 127 is reserved for page select
+ * if module is not "Flat memory".
+ */
+#define QSFP_PAGE_SELECT_BYTE_OFFS 127
+/* Byte 128 is Identifier: must be 0x0c for QSFP, or 0x0d for QSFP+ */
+#define QSFP_MOD_ID_OFFS 128
+/*
+ * Byte 129 is "Extended Identifier". We only care about D7,D6: Power class
+ * 0:1.5W, 1:2.0W, 2:2.5W, 3:3.5W
+ */
+#define QSFP_MOD_PWR_OFFS 129
+/* Byte 130 is Connector type. Not Intel req'd */
+/* Bytes 131..138 are Transceiver types, bit maps for various tech, none IB */
+/* Byte 139 is encoding. code 0x01 is 8b10b. Not Intel req'd */
+/* byte 140 is nominal bit-rate, in units of 100Mbits/sec Not Intel req'd */
+/* Byte 141 is Extended Rate Select. Not Intel req'd */
+/* Bytes 142..145 are lengths for various fiber types. Not Intel req'd */
+/* Byte 146 is length for Copper. Units of 1 meter */
+#define QSFP_MOD_LEN_OFFS 146
+/*
+ * Byte 147 is Device technology. D0..3 not Intel req'd
+ * D4..7 select from 15 choices, translated by table:
+ */
+#define QSFP_MOD_TECH_OFFS 147
+extern const char *const hfi1_qsfp_devtech[16];
+/* Active Equalization includes fiber, copper full EQ, and copper near Eq */
+#define QSFP_IS_ACTIVE(tech) ((0xA2FF >> ((tech) >> 4)) & 1)
+/* Active Equalization includes fiber, copper full EQ, and copper far Eq */
+#define QSFP_IS_ACTIVE_FAR(tech) ((0x32FF >> ((tech) >> 4)) & 1)
+/* Attenuation should be valid for copper other than full/near Eq */
+#define QSFP_HAS_ATTEN(tech) ((0x4D00 >> ((tech) >> 4)) & 1)
+/* Length is only valid if technology is "copper" */
+#define QSFP_IS_CU(tech) ((0xED00 >> ((tech) >> 4)) & 1)
+#define QSFP_TECH_1490 9
+
+#define QSFP_OUI(oui) (((unsigned)oui[0] << 16) | ((unsigned)oui[1] << 8) | \
+ oui[2])
+#define QSFP_OUI_AMPHENOL 0x415048
+#define QSFP_OUI_FINISAR 0x009065
+#define QSFP_OUI_GORE 0x002177
+
+/* Bytes 148..163 are Vendor Name, Left-justified Blank-filled */
+#define QSFP_VEND_OFFS 148
+#define QSFP_VEND_LEN 16
+/* Byte 164 is IB Extended transceiver codes Bits D0..3 are SDR,DDR,QDR,EDR */
+#define QSFP_IBXCV_OFFS 164
+/* Bytes 165..167 are Vendor OUI number */
+#define QSFP_VOUI_OFFS 165
+#define QSFP_VOUI_LEN 3
+/* Bytes 168..183 are Vendor Part Number, string */
+#define QSFP_PN_OFFS 168
+#define QSFP_PN_LEN 16
+/* Bytes 184,185 are Vendor Rev. Left Justified, Blank-filled */
+#define QSFP_REV_OFFS 184
+#define QSFP_REV_LEN 2
+/*
+ * Bytes 186,187 are Wavelength, if Optical. Not Intel req'd
+ * If copper, they are attenuation in dB:
+ * Byte 186 is at 2.5Gb/sec (SDR), Byte 187 at 5.0Gb/sec (DDR)
+ */
+#define QSFP_ATTEN_OFFS 186
+#define QSFP_ATTEN_LEN 2
+/* Bytes 188,189 are Wavelength tolerance, not Intel req'd */
+/* Byte 190 is Max Case Temp. Not Intel req'd */
+/* Byte 191 is LSB of sum of bytes 128..190. Not Intel req'd */
+#define QSFP_CC_OFFS 191
+/* Bytes 192..195 are Options implemented in qsfp. Not Intel req'd */
+/* Bytes 196..211 are Serial Number, String */
+#define QSFP_SN_OFFS 196
+#define QSFP_SN_LEN 16
+/* Bytes 212..219 are date-code YYMMDD (MM==1 for Jan) */
+#define QSFP_DATE_OFFS 212
+#define QSFP_DATE_LEN 6
+/* Bytes 218,219 are optional lot-code, string */
+#define QSFP_LOT_OFFS 218
+#define QSFP_LOT_LEN 2
+/* Bytes 220, 221 indicate monitoring options, Not Intel req'd */
+/* Byte 223 is LSB of sum of bytes 192..222 */
+#define QSFP_CC_EXT_OFFS 223
+
+/*
+ * Interrupt flag masks
+ */
+#define QSFP_DATA_NOT_READY 0x01
+
+#define QSFP_HIGH_TEMP_ALARM 0x80
+#define QSFP_LOW_TEMP_ALARM 0x40
+#define QSFP_HIGH_TEMP_WARNING 0x20
+#define QSFP_LOW_TEMP_WARNING 0x10
+
+#define QSFP_HIGH_VCC_ALARM 0x80
+#define QSFP_LOW_VCC_ALARM 0x40
+#define QSFP_HIGH_VCC_WARNING 0x20
+#define QSFP_LOW_VCC_WARNING 0x10
+
+#define QSFP_HIGH_POWER_ALARM 0x88
+#define QSFP_LOW_POWER_ALARM 0x44
+#define QSFP_HIGH_POWER_WARNING 0x22
+#define QSFP_LOW_POWER_WARNING 0x11
+
+#define QSFP_HIGH_BIAS_ALARM 0x88
+#define QSFP_LOW_BIAS_ALARM 0x44
+#define QSFP_HIGH_BIAS_WARNING 0x22
+#define QSFP_LOW_BIAS_WARNING 0x11
+
+/*
+ * struct qsfp_data encapsulates state of QSFP device for one port.
+ * it will be part of port-specific data if a board supports QSFP.
+ *
+ * Since multiple board-types use QSFP, and their pport_data structs
+ * differ (in the chip-specific section), we need a pointer to its head.
+ *
+ * Avoiding premature optimization, we will have one work_struct per port,
+ * and let the qsfp_lock arbitrate access to common resources.
+ *
+ */
+
+#define QSFP_PWR(pbyte) (((pbyte) >> 6) & 3)
+#define QSFP_ATTEN_SDR(attenarray) (attenarray[0])
+#define QSFP_ATTEN_DDR(attenarray) (attenarray[1])
+
+struct qsfp_data {
+ /* Helps to find our way */
+ struct hfi1_pportdata *ppd;
+ struct work_struct qsfp_work;
+ u8 cache[QSFP_MAX_NUM_PAGES*128];
+ spinlock_t qsfp_lock;
+ u8 check_interrupt_flags;
+ u8 qsfp_interrupt_functional;
+ u8 cache_valid;
+ u8 cache_refresh_required;
+};
+
+int refresh_qsfp_cache(struct hfi1_pportdata *ppd,
+ struct qsfp_data *cp);
+int qsfp_mod_present(struct hfi1_pportdata *ppd);
+int get_cable_info(struct hfi1_devdata *dd, u32 port_num, u32 addr,
+ u32 len, u8 *data);
+
+int i2c_write(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
+ int offset, void *bp, int len);
+int i2c_read(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
+ int offset, void *bp, int len);
+int qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
+ int len);
+int qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
+ int len);
diff --git a/drivers/staging/rdma/hfi1/rc.c b/drivers/staging/rdma/hfi1/rc.c
new file mode 100644
index 0000000..632dd5b
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/rc.c
@@ -0,0 +1,2426 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/io.h>
+
+#include "hfi.h"
+#include "qp.h"
+#include "sdma.h"
+#include "trace.h"
+
+/* cut down ridiculously long IB macro names */
+#define OP(x) IB_OPCODE_RC_##x
+
+static void rc_timeout(unsigned long arg);
+
+static u32 restart_sge(struct hfi1_sge_state *ss, struct hfi1_swqe *wqe,
+ u32 psn, u32 pmtu)
+{
+ u32 len;
+
+ len = delta_psn(psn, wqe->psn) * pmtu;
+ ss->sge = wqe->sg_list[0];
+ ss->sg_list = wqe->sg_list + 1;
+ ss->num_sge = wqe->wr.num_sge;
+ ss->total_len = wqe->length;
+ hfi1_skip_sge(ss, len, 0);
+ return wqe->length - len;
+}
+
+static void start_timer(struct hfi1_qp *qp)
+{
+ qp->s_flags |= HFI1_S_TIMER;
+ qp->s_timer.function = rc_timeout;
+ /* 4.096 usec. * (1 << qp->timeout) */
+ qp->s_timer.expires = jiffies + qp->timeout_jiffies;
+ add_timer(&qp->s_timer);
+}
+
+/**
+ * make_rc_ack - construct a response packet (ACK, NAK, or RDMA read)
+ * @dev: the device for this QP
+ * @qp: a pointer to the QP
+ * @ohdr: a pointer to the IB header being constructed
+ * @pmtu: the path MTU
+ *
+ * Return 1 if constructed; otherwise, return 0.
+ * Note that we are in the responder's side of the QP context.
+ * Note the QP s_lock must be held.
+ */
+static int make_rc_ack(struct hfi1_ibdev *dev, struct hfi1_qp *qp,
+ struct hfi1_other_headers *ohdr, u32 pmtu)
+{
+ struct hfi1_ack_entry *e;
+ u32 hwords;
+ u32 len;
+ u32 bth0;
+ u32 bth2;
+ int middle = 0;
+
+ /* Don't send an ACK if we aren't supposed to. */
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK))
+ goto bail;
+
+ /* header size in 32-bit words LRH+BTH = (8+12)/4. */
+ hwords = 5;
+
+ switch (qp->s_ack_state) {
+ case OP(RDMA_READ_RESPONSE_LAST):
+ case OP(RDMA_READ_RESPONSE_ONLY):
+ e = &qp->s_ack_queue[qp->s_tail_ack_queue];
+ if (e->rdma_sge.mr) {
+ hfi1_put_mr(e->rdma_sge.mr);
+ e->rdma_sge.mr = NULL;
+ }
+ /* FALLTHROUGH */
+ case OP(ATOMIC_ACKNOWLEDGE):
+ /*
+ * We can increment the tail pointer now that the last
+ * response has been sent instead of only being
+ * constructed.
+ */
+ if (++qp->s_tail_ack_queue > HFI1_MAX_RDMA_ATOMIC)
+ qp->s_tail_ack_queue = 0;
+ /* FALLTHROUGH */
+ case OP(SEND_ONLY):
+ case OP(ACKNOWLEDGE):
+ /* Check for no next entry in the queue. */
+ if (qp->r_head_ack_queue == qp->s_tail_ack_queue) {
+ if (qp->s_flags & HFI1_S_ACK_PENDING)
+ goto normal;
+ goto bail;
+ }
+
+ e = &qp->s_ack_queue[qp->s_tail_ack_queue];
+ if (e->opcode == OP(RDMA_READ_REQUEST)) {
+ /*
+ * If a RDMA read response is being resent and
+ * we haven't seen the duplicate request yet,
+ * then stop sending the remaining responses the
+ * responder has seen until the requester re-sends it.
+ */
+ len = e->rdma_sge.sge_length;
+ if (len && !e->rdma_sge.mr) {
+ qp->s_tail_ack_queue = qp->r_head_ack_queue;
+ goto bail;
+ }
+ /* Copy SGE state in case we need to resend */
+ qp->s_rdma_mr = e->rdma_sge.mr;
+ if (qp->s_rdma_mr)
+ hfi1_get_mr(qp->s_rdma_mr);
+ qp->s_ack_rdma_sge.sge = e->rdma_sge;
+ qp->s_ack_rdma_sge.num_sge = 1;
+ qp->s_cur_sge = &qp->s_ack_rdma_sge;
+ if (len > pmtu) {
+ len = pmtu;
+ qp->s_ack_state = OP(RDMA_READ_RESPONSE_FIRST);
+ } else {
+ qp->s_ack_state = OP(RDMA_READ_RESPONSE_ONLY);
+ e->sent = 1;
+ }
+ ohdr->u.aeth = hfi1_compute_aeth(qp);
+ hwords++;
+ qp->s_ack_rdma_psn = e->psn;
+ bth2 = mask_psn(qp->s_ack_rdma_psn++);
+ } else {
+ /* COMPARE_SWAP or FETCH_ADD */
+ qp->s_cur_sge = NULL;
+ len = 0;
+ qp->s_ack_state = OP(ATOMIC_ACKNOWLEDGE);
+ ohdr->u.at.aeth = hfi1_compute_aeth(qp);
+ ohdr->u.at.atomic_ack_eth[0] =
+ cpu_to_be32(e->atomic_data >> 32);
+ ohdr->u.at.atomic_ack_eth[1] =
+ cpu_to_be32(e->atomic_data);
+ hwords += sizeof(ohdr->u.at) / sizeof(u32);
+ bth2 = mask_psn(e->psn);
+ e->sent = 1;
+ }
+ bth0 = qp->s_ack_state << 24;
+ break;
+
+ case OP(RDMA_READ_RESPONSE_FIRST):
+ qp->s_ack_state = OP(RDMA_READ_RESPONSE_MIDDLE);
+ /* FALLTHROUGH */
+ case OP(RDMA_READ_RESPONSE_MIDDLE):
+ qp->s_cur_sge = &qp->s_ack_rdma_sge;
+ qp->s_rdma_mr = qp->s_ack_rdma_sge.sge.mr;
+ if (qp->s_rdma_mr)
+ hfi1_get_mr(qp->s_rdma_mr);
+ len = qp->s_ack_rdma_sge.sge.sge_length;
+ if (len > pmtu) {
+ len = pmtu;
+ middle = HFI1_CAP_IS_KSET(SDMA_AHG);
+ } else {
+ ohdr->u.aeth = hfi1_compute_aeth(qp);
+ hwords++;
+ qp->s_ack_state = OP(RDMA_READ_RESPONSE_LAST);
+ e = &qp->s_ack_queue[qp->s_tail_ack_queue];
+ e->sent = 1;
+ }
+ bth0 = qp->s_ack_state << 24;
+ bth2 = mask_psn(qp->s_ack_rdma_psn++);
+ break;
+
+ default:
+normal:
+ /*
+ * Send a regular ACK.
+ * Set the s_ack_state so we wait until after sending
+ * the ACK before setting s_ack_state to ACKNOWLEDGE
+ * (see above).
+ */
+ qp->s_ack_state = OP(SEND_ONLY);
+ qp->s_flags &= ~HFI1_S_ACK_PENDING;
+ qp->s_cur_sge = NULL;
+ if (qp->s_nak_state)
+ ohdr->u.aeth =
+ cpu_to_be32((qp->r_msn & HFI1_MSN_MASK) |
+ (qp->s_nak_state <<
+ HFI1_AETH_CREDIT_SHIFT));
+ else
+ ohdr->u.aeth = hfi1_compute_aeth(qp);
+ hwords++;
+ len = 0;
+ bth0 = OP(ACKNOWLEDGE) << 24;
+ bth2 = mask_psn(qp->s_ack_psn);
+ }
+ qp->s_rdma_ack_cnt++;
+ qp->s_hdrwords = hwords;
+ qp->s_cur_size = len;
+ hfi1_make_ruc_header(qp, ohdr, bth0, bth2, middle);
+ return 1;
+
+bail:
+ qp->s_ack_state = OP(ACKNOWLEDGE);
+ /*
+ * Ensure s_rdma_ack_cnt changes are committed prior to resetting
+ * HFI1_S_RESP_PENDING
+ */
+ smp_wmb();
+ qp->s_flags &= ~(HFI1_S_RESP_PENDING
+ | HFI1_S_ACK_PENDING
+ | HFI1_S_AHG_VALID);
+ return 0;
+}
+
+/**
+ * hfi1_make_rc_req - construct a request packet (SEND, RDMA r/w, ATOMIC)
+ * @qp: a pointer to the QP
+ *
+ * Return 1 if constructed; otherwise, return 0.
+ */
+int hfi1_make_rc_req(struct hfi1_qp *qp)
+{
+ struct hfi1_ibdev *dev = to_idev(qp->ibqp.device);
+ struct hfi1_other_headers *ohdr;
+ struct hfi1_sge_state *ss;
+ struct hfi1_swqe *wqe;
+ /* header size in 32-bit words LRH+BTH = (8+12)/4. */
+ u32 hwords = 5;
+ u32 len;
+ u32 bth0 = 0;
+ u32 bth2;
+ u32 pmtu = qp->pmtu;
+ char newreq;
+ unsigned long flags;
+ int ret = 0;
+ int middle = 0;
+ int delta;
+
+ ohdr = &qp->s_hdr->ibh.u.oth;
+ if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
+ ohdr = &qp->s_hdr->ibh.u.l.oth;
+
+ /*
+ * The lock is needed to synchronize between the sending tasklet,
+ * the receive interrupt handler, and timeout re-sends.
+ */
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ /* Sending responses has higher priority over sending requests. */
+ if ((qp->s_flags & HFI1_S_RESP_PENDING) &&
+ make_rc_ack(dev, qp, ohdr, pmtu))
+ goto done;
+
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_SEND_OK)) {
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_FLUSH_SEND))
+ goto bail;
+ /* We are in the error state, flush the work request. */
+ if (qp->s_last == qp->s_head)
+ goto bail;
+ /* If DMAs are in progress, we can't flush immediately. */
+ if (atomic_read(&qp->s_iowait.sdma_busy)) {
+ qp->s_flags |= HFI1_S_WAIT_DMA;
+ goto bail;
+ }
+ clear_ahg(qp);
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ hfi1_send_complete(qp, wqe, qp->s_last != qp->s_acked ?
+ IB_WC_SUCCESS : IB_WC_WR_FLUSH_ERR);
+ /* will get called again */
+ goto done;
+ }
+
+ if (qp->s_flags & (HFI1_S_WAIT_RNR | HFI1_S_WAIT_ACK))
+ goto bail;
+
+ if (cmp_psn(qp->s_psn, qp->s_sending_hpsn) <= 0) {
+ if (cmp_psn(qp->s_sending_psn, qp->s_sending_hpsn) <= 0) {
+ qp->s_flags |= HFI1_S_WAIT_PSN;
+ goto bail;
+ }
+ qp->s_sending_psn = qp->s_psn;
+ qp->s_sending_hpsn = qp->s_psn - 1;
+ }
+
+ /* Send a request. */
+ wqe = get_swqe_ptr(qp, qp->s_cur);
+ switch (qp->s_state) {
+ default:
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_NEXT_SEND_OK))
+ goto bail;
+ /*
+ * Resend an old request or start a new one.
+ *
+ * We keep track of the current SWQE so that
+ * we don't reset the "furthest progress" state
+ * if we need to back up.
+ */
+ newreq = 0;
+ if (qp->s_cur == qp->s_tail) {
+ /* Check if send work queue is empty. */
+ if (qp->s_tail == qp->s_head) {
+ clear_ahg(qp);
+ goto bail;
+ }
+ /*
+ * If a fence is requested, wait for previous
+ * RDMA read and atomic operations to finish.
+ */
+ if ((wqe->wr.send_flags & IB_SEND_FENCE) &&
+ qp->s_num_rd_atomic) {
+ qp->s_flags |= HFI1_S_WAIT_FENCE;
+ goto bail;
+ }
+ wqe->psn = qp->s_next_psn;
+ newreq = 1;
+ }
+ /*
+ * Note that we have to be careful not to modify the
+ * original work request since we may need to resend
+ * it.
+ */
+ len = wqe->length;
+ ss = &qp->s_sge;
+ bth2 = mask_psn(qp->s_psn);
+ switch (wqe->wr.opcode) {
+ case IB_WR_SEND:
+ case IB_WR_SEND_WITH_IMM:
+ /* If no credit, return. */
+ if (!(qp->s_flags & HFI1_S_UNLIMITED_CREDIT) &&
+ cmp_msn(wqe->ssn, qp->s_lsn + 1) > 0) {
+ qp->s_flags |= HFI1_S_WAIT_SSN_CREDIT;
+ goto bail;
+ }
+ wqe->lpsn = wqe->psn;
+ if (len > pmtu) {
+ wqe->lpsn += (len - 1) / pmtu;
+ qp->s_state = OP(SEND_FIRST);
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_SEND)
+ qp->s_state = OP(SEND_ONLY);
+ else {
+ qp->s_state = OP(SEND_ONLY_WITH_IMMEDIATE);
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.ex.imm_data;
+ hwords += 1;
+ }
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= IB_BTH_SOLICITED;
+ bth2 |= IB_BTH_REQ_ACK;
+ if (++qp->s_cur == qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case IB_WR_RDMA_WRITE:
+ if (newreq && !(qp->s_flags & HFI1_S_UNLIMITED_CREDIT))
+ qp->s_lsn++;
+ /* FALLTHROUGH */
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ /* If no credit, return. */
+ if (!(qp->s_flags & HFI1_S_UNLIMITED_CREDIT) &&
+ cmp_msn(wqe->ssn, qp->s_lsn + 1) > 0) {
+ qp->s_flags |= HFI1_S_WAIT_SSN_CREDIT;
+ goto bail;
+ }
+ ohdr->u.rc.reth.vaddr =
+ cpu_to_be64(wqe->wr.wr.rdma.remote_addr);
+ ohdr->u.rc.reth.rkey =
+ cpu_to_be32(wqe->wr.wr.rdma.rkey);
+ ohdr->u.rc.reth.length = cpu_to_be32(len);
+ hwords += sizeof(struct ib_reth) / sizeof(u32);
+ wqe->lpsn = wqe->psn;
+ if (len > pmtu) {
+ wqe->lpsn += (len - 1) / pmtu;
+ qp->s_state = OP(RDMA_WRITE_FIRST);
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE)
+ qp->s_state = OP(RDMA_WRITE_ONLY);
+ else {
+ qp->s_state =
+ OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE);
+ /* Immediate data comes after RETH */
+ ohdr->u.rc.imm_data = wqe->wr.ex.imm_data;
+ hwords += 1;
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= IB_BTH_SOLICITED;
+ }
+ bth2 |= IB_BTH_REQ_ACK;
+ if (++qp->s_cur == qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case IB_WR_RDMA_READ:
+ /*
+ * Don't allow more operations to be started
+ * than the QP limits allow.
+ */
+ if (newreq) {
+ if (qp->s_num_rd_atomic >=
+ qp->s_max_rd_atomic) {
+ qp->s_flags |= HFI1_S_WAIT_RDMAR;
+ goto bail;
+ }
+ qp->s_num_rd_atomic++;
+ if (!(qp->s_flags & HFI1_S_UNLIMITED_CREDIT))
+ qp->s_lsn++;
+ /*
+ * Adjust s_next_psn to count the
+ * expected number of responses.
+ */
+ if (len > pmtu)
+ qp->s_next_psn += (len - 1) / pmtu;
+ wqe->lpsn = qp->s_next_psn++;
+ }
+ ohdr->u.rc.reth.vaddr =
+ cpu_to_be64(wqe->wr.wr.rdma.remote_addr);
+ ohdr->u.rc.reth.rkey =
+ cpu_to_be32(wqe->wr.wr.rdma.rkey);
+ ohdr->u.rc.reth.length = cpu_to_be32(len);
+ qp->s_state = OP(RDMA_READ_REQUEST);
+ hwords += sizeof(ohdr->u.rc.reth) / sizeof(u32);
+ ss = NULL;
+ len = 0;
+ bth2 |= IB_BTH_REQ_ACK;
+ if (++qp->s_cur == qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case IB_WR_ATOMIC_CMP_AND_SWP:
+ case IB_WR_ATOMIC_FETCH_AND_ADD:
+ /*
+ * Don't allow more operations to be started
+ * than the QP limits allow.
+ */
+ if (newreq) {
+ if (qp->s_num_rd_atomic >=
+ qp->s_max_rd_atomic) {
+ qp->s_flags |= HFI1_S_WAIT_RDMAR;
+ goto bail;
+ }
+ qp->s_num_rd_atomic++;
+ if (!(qp->s_flags & HFI1_S_UNLIMITED_CREDIT))
+ qp->s_lsn++;
+ wqe->lpsn = wqe->psn;
+ }
+ if (wqe->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
+ qp->s_state = OP(COMPARE_SWAP);
+ ohdr->u.atomic_eth.swap_data = cpu_to_be64(
+ wqe->wr.wr.atomic.swap);
+ ohdr->u.atomic_eth.compare_data = cpu_to_be64(
+ wqe->wr.wr.atomic.compare_add);
+ } else {
+ qp->s_state = OP(FETCH_ADD);
+ ohdr->u.atomic_eth.swap_data = cpu_to_be64(
+ wqe->wr.wr.atomic.compare_add);
+ ohdr->u.atomic_eth.compare_data = 0;
+ }
+ ohdr->u.atomic_eth.vaddr[0] = cpu_to_be32(
+ wqe->wr.wr.atomic.remote_addr >> 32);
+ ohdr->u.atomic_eth.vaddr[1] = cpu_to_be32(
+ wqe->wr.wr.atomic.remote_addr);
+ ohdr->u.atomic_eth.rkey = cpu_to_be32(
+ wqe->wr.wr.atomic.rkey);
+ hwords += sizeof(struct ib_atomic_eth) / sizeof(u32);
+ ss = NULL;
+ len = 0;
+ bth2 |= IB_BTH_REQ_ACK;
+ if (++qp->s_cur == qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ default:
+ goto bail;
+ }
+ qp->s_sge.sge = wqe->sg_list[0];
+ qp->s_sge.sg_list = wqe->sg_list + 1;
+ qp->s_sge.num_sge = wqe->wr.num_sge;
+ qp->s_sge.total_len = wqe->length;
+ qp->s_len = wqe->length;
+ if (newreq) {
+ qp->s_tail++;
+ if (qp->s_tail >= qp->s_size)
+ qp->s_tail = 0;
+ }
+ if (wqe->wr.opcode == IB_WR_RDMA_READ)
+ qp->s_psn = wqe->lpsn + 1;
+ else {
+ qp->s_psn++;
+ if (cmp_psn(qp->s_psn, qp->s_next_psn) > 0)
+ qp->s_next_psn = qp->s_psn;
+ }
+ break;
+
+ case OP(RDMA_READ_RESPONSE_FIRST):
+ /*
+ * qp->s_state is normally set to the opcode of the
+ * last packet constructed for new requests and therefore
+ * is never set to RDMA read response.
+ * RDMA_READ_RESPONSE_FIRST is used by the ACK processing
+ * thread to indicate a SEND needs to be restarted from an
+ * earlier PSN without interfering with the sending thread.
+ * See restart_rc().
+ */
+ qp->s_len = restart_sge(&qp->s_sge, wqe, qp->s_psn, pmtu);
+ /* FALLTHROUGH */
+ case OP(SEND_FIRST):
+ qp->s_state = OP(SEND_MIDDLE);
+ /* FALLTHROUGH */
+ case OP(SEND_MIDDLE):
+ bth2 = mask_psn(qp->s_psn++);
+ if (cmp_psn(qp->s_psn, qp->s_next_psn) > 0)
+ qp->s_next_psn = qp->s_psn;
+ ss = &qp->s_sge;
+ len = qp->s_len;
+ if (len > pmtu) {
+ len = pmtu;
+ middle = HFI1_CAP_IS_KSET(SDMA_AHG);
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_SEND)
+ qp->s_state = OP(SEND_LAST);
+ else {
+ qp->s_state = OP(SEND_LAST_WITH_IMMEDIATE);
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.ex.imm_data;
+ hwords += 1;
+ }
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= IB_BTH_SOLICITED;
+ bth2 |= IB_BTH_REQ_ACK;
+ qp->s_cur++;
+ if (qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case OP(RDMA_READ_RESPONSE_LAST):
+ /*
+ * qp->s_state is normally set to the opcode of the
+ * last packet constructed for new requests and therefore
+ * is never set to RDMA read response.
+ * RDMA_READ_RESPONSE_LAST is used by the ACK processing
+ * thread to indicate a RDMA write needs to be restarted from
+ * an earlier PSN without interfering with the sending thread.
+ * See restart_rc().
+ */
+ qp->s_len = restart_sge(&qp->s_sge, wqe, qp->s_psn, pmtu);
+ /* FALLTHROUGH */
+ case OP(RDMA_WRITE_FIRST):
+ qp->s_state = OP(RDMA_WRITE_MIDDLE);
+ /* FALLTHROUGH */
+ case OP(RDMA_WRITE_MIDDLE):
+ bth2 = mask_psn(qp->s_psn++);
+ if (cmp_psn(qp->s_psn, qp->s_next_psn) > 0)
+ qp->s_next_psn = qp->s_psn;
+ ss = &qp->s_sge;
+ len = qp->s_len;
+ if (len > pmtu) {
+ len = pmtu;
+ middle = HFI1_CAP_IS_KSET(SDMA_AHG);
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE)
+ qp->s_state = OP(RDMA_WRITE_LAST);
+ else {
+ qp->s_state = OP(RDMA_WRITE_LAST_WITH_IMMEDIATE);
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.ex.imm_data;
+ hwords += 1;
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= IB_BTH_SOLICITED;
+ }
+ bth2 |= IB_BTH_REQ_ACK;
+ qp->s_cur++;
+ if (qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case OP(RDMA_READ_RESPONSE_MIDDLE):
+ /*
+ * qp->s_state is normally set to the opcode of the
+ * last packet constructed for new requests and therefore
+ * is never set to RDMA read response.
+ * RDMA_READ_RESPONSE_MIDDLE is used by the ACK processing
+ * thread to indicate a RDMA read needs to be restarted from
+ * an earlier PSN without interfering with the sending thread.
+ * See restart_rc().
+ */
+ len = (delta_psn(qp->s_psn, wqe->psn)) * pmtu;
+ ohdr->u.rc.reth.vaddr =
+ cpu_to_be64(wqe->wr.wr.rdma.remote_addr + len);
+ ohdr->u.rc.reth.rkey =
+ cpu_to_be32(wqe->wr.wr.rdma.rkey);
+ ohdr->u.rc.reth.length = cpu_to_be32(wqe->length - len);
+ qp->s_state = OP(RDMA_READ_REQUEST);
+ hwords += sizeof(ohdr->u.rc.reth) / sizeof(u32);
+ bth2 = mask_psn(qp->s_psn) | IB_BTH_REQ_ACK;
+ qp->s_psn = wqe->lpsn + 1;
+ ss = NULL;
+ len = 0;
+ qp->s_cur++;
+ if (qp->s_cur == qp->s_size)
+ qp->s_cur = 0;
+ break;
+ }
+ qp->s_sending_hpsn = bth2;
+ delta = delta_psn(bth2, wqe->psn);
+ if (delta && delta % HFI1_PSN_CREDIT == 0)
+ bth2 |= IB_BTH_REQ_ACK;
+ if (qp->s_flags & HFI1_S_SEND_ONE) {
+ qp->s_flags &= ~HFI1_S_SEND_ONE;
+ qp->s_flags |= HFI1_S_WAIT_ACK;
+ bth2 |= IB_BTH_REQ_ACK;
+ }
+ qp->s_len -= len;
+ qp->s_hdrwords = hwords;
+ qp->s_cur_sge = ss;
+ qp->s_cur_size = len;
+ hfi1_make_ruc_header(
+ qp,
+ ohdr,
+ bth0 | (qp->s_state << 24),
+ bth2,
+ middle);
+done:
+ ret = 1;
+ goto unlock;
+
+bail:
+ qp->s_flags &= ~HFI1_S_BUSY;
+unlock:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return ret;
+}
+
+/**
+ * hfi1_send_rc_ack - Construct an ACK packet and send it
+ * @qp: a pointer to the QP
+ *
+ * This is called from hfi1_rc_rcv() and handle_receive_interrupt().
+ * Note that RDMA reads and atomics are handled in the
+ * send side QP state and tasklet.
+ */
+void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct hfi1_qp *qp,
+ int is_fecn)
+{
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u64 pbc, pbc_flags = 0;
+ u16 lrh0;
+ u16 sc5;
+ u32 bth0;
+ u32 hwords;
+ u32 vl, plen;
+ struct send_context *sc;
+ struct pio_buf *pbuf;
+ struct hfi1_ib_header hdr;
+ struct hfi1_other_headers *ohdr;
+
+ /* Don't send ACK or NAK if a RDMA read or atomic is pending. */
+ if (qp->s_flags & HFI1_S_RESP_PENDING)
+ goto queue_ack;
+
+ /* Ensure s_rdma_ack_cnt changes are committed */
+ smp_read_barrier_depends();
+ if (qp->s_rdma_ack_cnt)
+ goto queue_ack;
+
+ /* Construct the header */
+ /* header size in 32-bit words LRH+BTH+AETH = (8+12+4)/4 */
+ hwords = 6;
+ if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
+ hwords += hfi1_make_grh(ibp, &hdr.u.l.grh,
+ &qp->remote_ah_attr.grh, hwords, 0);
+ ohdr = &hdr.u.l.oth;
+ lrh0 = HFI1_LRH_GRH;
+ } else {
+ ohdr = &hdr.u.oth;
+ lrh0 = HFI1_LRH_BTH;
+ }
+ /* read pkey_index w/o lock (its atomic) */
+ bth0 = hfi1_get_pkey(ibp, qp->s_pkey_index) | (OP(ACKNOWLEDGE) << 24);
+ if (qp->s_mig_state == IB_MIG_MIGRATED)
+ bth0 |= IB_BTH_MIG_REQ;
+ if (qp->r_nak_state)
+ ohdr->u.aeth = cpu_to_be32((qp->r_msn & HFI1_MSN_MASK) |
+ (qp->r_nak_state <<
+ HFI1_AETH_CREDIT_SHIFT));
+ else
+ ohdr->u.aeth = hfi1_compute_aeth(qp);
+ sc5 = ibp->sl_to_sc[qp->remote_ah_attr.sl];
+ /* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
+ pbc_flags |= ((!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT);
+ lrh0 |= (sc5 & 0xf) << 12 | (qp->remote_ah_attr.sl & 0xf) << 4;
+ hdr.lrh[0] = cpu_to_be16(lrh0);
+ hdr.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
+ hdr.lrh[2] = cpu_to_be16(hwords + SIZE_OF_CRC);
+ hdr.lrh[3] = cpu_to_be16(ppd->lid | qp->remote_ah_attr.src_path_bits);
+ ohdr->bth[0] = cpu_to_be32(bth0);
+ ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
+ ohdr->bth[1] |= cpu_to_be32((!!is_fecn) << HFI1_BECN_SHIFT);
+ ohdr->bth[2] = cpu_to_be32(mask_psn(qp->r_ack_psn));
+
+ /* Don't try to send ACKs if the link isn't ACTIVE */
+ if (driver_lstate(ppd) != IB_PORT_ACTIVE)
+ return;
+
+ sc = rcd->sc;
+ plen = 2 /* PBC */ + hwords;
+ vl = sc_to_vlt(ppd->dd, sc5);
+ pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen);
+
+ pbuf = sc_buffer_alloc(sc, plen, NULL, NULL);
+ if (!pbuf) {
+ /*
+ * We have no room to send at the moment. Pass
+ * responsibility for sending the ACK to the send tasklet
+ * so that when enough buffer space becomes available,
+ * the ACK is sent ahead of other outgoing packets.
+ */
+ goto queue_ack;
+ }
+
+ trace_output_ibhdr(dd_from_ibdev(qp->ibqp.device), &hdr);
+
+ /* write the pbc and data */
+ ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc, &hdr, hwords);
+
+ return;
+
+queue_ack:
+ this_cpu_inc(*ibp->rc_qacks);
+ spin_lock(&qp->s_lock);
+ qp->s_flags |= HFI1_S_ACK_PENDING | HFI1_S_RESP_PENDING;
+ qp->s_nak_state = qp->r_nak_state;
+ qp->s_ack_psn = qp->r_ack_psn;
+ if (is_fecn)
+ qp->s_flags |= HFI1_S_ECN;
+
+ /* Schedule the send tasklet. */
+ hfi1_schedule_send(qp);
+ spin_unlock(&qp->s_lock);
+}
+
+/**
+ * reset_psn - reset the QP state to send starting from PSN
+ * @qp: the QP
+ * @psn: the packet sequence number to restart at
+ *
+ * This is called from hfi1_rc_rcv() to process an incoming RC ACK
+ * for the given QP.
+ * Called at interrupt level with the QP s_lock held.
+ */
+static void reset_psn(struct hfi1_qp *qp, u32 psn)
+{
+ u32 n = qp->s_acked;
+ struct hfi1_swqe *wqe = get_swqe_ptr(qp, n);
+ u32 opcode;
+
+ qp->s_cur = n;
+
+ /*
+ * If we are starting the request from the beginning,
+ * let the normal send code handle initialization.
+ */
+ if (cmp_psn(psn, wqe->psn) <= 0) {
+ qp->s_state = OP(SEND_LAST);
+ goto done;
+ }
+
+ /* Find the work request opcode corresponding to the given PSN. */
+ opcode = wqe->wr.opcode;
+ for (;;) {
+ int diff;
+
+ if (++n == qp->s_size)
+ n = 0;
+ if (n == qp->s_tail)
+ break;
+ wqe = get_swqe_ptr(qp, n);
+ diff = cmp_psn(psn, wqe->psn);
+ if (diff < 0)
+ break;
+ qp->s_cur = n;
+ /*
+ * If we are starting the request from the beginning,
+ * let the normal send code handle initialization.
+ */
+ if (diff == 0) {
+ qp->s_state = OP(SEND_LAST);
+ goto done;
+ }
+ opcode = wqe->wr.opcode;
+ }
+
+ /*
+ * Set the state to restart in the middle of a request.
+ * Don't change the s_sge, s_cur_sge, or s_cur_size.
+ * See hfi1_make_rc_req().
+ */
+ switch (opcode) {
+ case IB_WR_SEND:
+ case IB_WR_SEND_WITH_IMM:
+ qp->s_state = OP(RDMA_READ_RESPONSE_FIRST);
+ break;
+
+ case IB_WR_RDMA_WRITE:
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ qp->s_state = OP(RDMA_READ_RESPONSE_LAST);
+ break;
+
+ case IB_WR_RDMA_READ:
+ qp->s_state = OP(RDMA_READ_RESPONSE_MIDDLE);
+ break;
+
+ default:
+ /*
+ * This case shouldn't happen since its only
+ * one PSN per req.
+ */
+ qp->s_state = OP(SEND_LAST);
+ }
+done:
+ qp->s_psn = psn;
+ /*
+ * Set HFI1_S_WAIT_PSN as rc_complete() may start the timer
+ * asynchronously before the send tasklet can get scheduled.
+ * Doing it in hfi1_make_rc_req() is too late.
+ */
+ if ((cmp_psn(qp->s_psn, qp->s_sending_hpsn) <= 0) &&
+ (cmp_psn(qp->s_sending_psn, qp->s_sending_hpsn) <= 0))
+ qp->s_flags |= HFI1_S_WAIT_PSN;
+ qp->s_flags &= ~HFI1_S_AHG_VALID;
+}
+
+/*
+ * Back up requester to resend the last un-ACKed request.
+ * The QP r_lock and s_lock should be held and interrupts disabled.
+ */
+static void restart_rc(struct hfi1_qp *qp, u32 psn, int wait)
+{
+ struct hfi1_swqe *wqe = get_swqe_ptr(qp, qp->s_acked);
+ struct hfi1_ibport *ibp;
+
+ if (qp->s_retry == 0) {
+ if (qp->s_mig_state == IB_MIG_ARMED) {
+ hfi1_migrate_qp(qp);
+ qp->s_retry = qp->s_retry_cnt;
+ } else if (qp->s_last == qp->s_acked) {
+ hfi1_send_complete(qp, wqe, IB_WC_RETRY_EXC_ERR);
+ hfi1_error_qp(qp, IB_WC_WR_FLUSH_ERR);
+ return;
+ } else /* need to handle delayed completion */
+ return;
+ } else
+ qp->s_retry--;
+
+ ibp = to_iport(qp->ibqp.device, qp->port_num);
+ if (wqe->wr.opcode == IB_WR_RDMA_READ)
+ ibp->n_rc_resends++;
+ else
+ ibp->n_rc_resends += delta_psn(qp->s_psn, psn);
+
+ qp->s_flags &= ~(HFI1_S_WAIT_FENCE | HFI1_S_WAIT_RDMAR |
+ HFI1_S_WAIT_SSN_CREDIT | HFI1_S_WAIT_PSN |
+ HFI1_S_WAIT_ACK);
+ if (wait)
+ qp->s_flags |= HFI1_S_SEND_ONE;
+ reset_psn(qp, psn);
+}
+
+/*
+ * This is called from s_timer for missing responses.
+ */
+static void rc_timeout(unsigned long arg)
+{
+ struct hfi1_qp *qp = (struct hfi1_qp *)arg;
+ struct hfi1_ibport *ibp;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qp->r_lock, flags);
+ spin_lock(&qp->s_lock);
+ if (qp->s_flags & HFI1_S_TIMER) {
+ ibp = to_iport(qp->ibqp.device, qp->port_num);
+ ibp->n_rc_timeouts++;
+ qp->s_flags &= ~HFI1_S_TIMER;
+ del_timer(&qp->s_timer);
+ restart_rc(qp, qp->s_last_psn + 1, 1);
+ hfi1_schedule_send(qp);
+ }
+ spin_unlock(&qp->s_lock);
+ spin_unlock_irqrestore(&qp->r_lock, flags);
+}
+
+/*
+ * This is called from s_timer for RNR timeouts.
+ */
+void hfi1_rc_rnr_retry(unsigned long arg)
+{
+ struct hfi1_qp *qp = (struct hfi1_qp *)arg;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (qp->s_flags & HFI1_S_WAIT_RNR) {
+ qp->s_flags &= ~HFI1_S_WAIT_RNR;
+ del_timer(&qp->s_timer);
+ hfi1_schedule_send(qp);
+ }
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+}
+
+/*
+ * Set qp->s_sending_psn to the next PSN after the given one.
+ * This would be psn+1 except when RDMA reads are present.
+ */
+static void reset_sending_psn(struct hfi1_qp *qp, u32 psn)
+{
+ struct hfi1_swqe *wqe;
+ u32 n = qp->s_last;
+
+ /* Find the work request corresponding to the given PSN. */
+ for (;;) {
+ wqe = get_swqe_ptr(qp, n);
+ if (cmp_psn(psn, wqe->lpsn) <= 0) {
+ if (wqe->wr.opcode == IB_WR_RDMA_READ)
+ qp->s_sending_psn = wqe->lpsn + 1;
+ else
+ qp->s_sending_psn = psn + 1;
+ break;
+ }
+ if (++n == qp->s_size)
+ n = 0;
+ if (n == qp->s_tail)
+ break;
+ }
+}
+
+/*
+ * This should be called with the QP s_lock held and interrupts disabled.
+ */
+void hfi1_rc_send_complete(struct hfi1_qp *qp, struct hfi1_ib_header *hdr)
+{
+ struct hfi1_other_headers *ohdr;
+ struct hfi1_swqe *wqe;
+ struct ib_wc wc;
+ unsigned i;
+ u32 opcode;
+ u32 psn;
+
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_OR_FLUSH_SEND))
+ return;
+
+ /* Find out where the BTH is */
+ if ((be16_to_cpu(hdr->lrh[0]) & 3) == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth;
+ else
+ ohdr = &hdr->u.l.oth;
+
+ opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+ if (opcode >= OP(RDMA_READ_RESPONSE_FIRST) &&
+ opcode <= OP(ATOMIC_ACKNOWLEDGE)) {
+ WARN_ON(!qp->s_rdma_ack_cnt);
+ qp->s_rdma_ack_cnt--;
+ return;
+ }
+
+ psn = be32_to_cpu(ohdr->bth[2]);
+ reset_sending_psn(qp, psn);
+
+ /*
+ * Start timer after a packet requesting an ACK has been sent and
+ * there are still requests that haven't been acked.
+ */
+ if ((psn & IB_BTH_REQ_ACK) && qp->s_acked != qp->s_tail &&
+ !(qp->s_flags &
+ (HFI1_S_TIMER | HFI1_S_WAIT_RNR | HFI1_S_WAIT_PSN)) &&
+ (ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK))
+ start_timer(qp);
+
+ while (qp->s_last != qp->s_acked) {
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ if (cmp_psn(wqe->lpsn, qp->s_sending_psn) >= 0 &&
+ cmp_psn(qp->s_sending_psn, qp->s_sending_hpsn) <= 0)
+ break;
+ for (i = 0; i < wqe->wr.num_sge; i++) {
+ struct hfi1_sge *sge = &wqe->sg_list[i];
+
+ hfi1_put_mr(sge->mr);
+ }
+ /* Post a send completion queue entry if requested. */
+ if (!(qp->s_flags & HFI1_S_SIGNAL_REQ_WR) ||
+ (wqe->wr.send_flags & IB_SEND_SIGNALED)) {
+ memset(&wc, 0, sizeof(wc));
+ wc.wr_id = wqe->wr.wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = ib_hfi1_wc_opcode[wqe->wr.opcode];
+ wc.byte_len = wqe->length;
+ wc.qp = &qp->ibqp;
+ hfi1_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 0);
+ }
+ if (++qp->s_last >= qp->s_size)
+ qp->s_last = 0;
+ }
+ /*
+ * If we were waiting for sends to complete before re-sending,
+ * and they are now complete, restart sending.
+ */
+ trace_hfi1_rc_sendcomplete(qp, psn);
+ if (qp->s_flags & HFI1_S_WAIT_PSN &&
+ cmp_psn(qp->s_sending_psn, qp->s_sending_hpsn) > 0) {
+ qp->s_flags &= ~HFI1_S_WAIT_PSN;
+ qp->s_sending_psn = qp->s_psn;
+ qp->s_sending_hpsn = qp->s_psn - 1;
+ hfi1_schedule_send(qp);
+ }
+}
+
+static inline void update_last_psn(struct hfi1_qp *qp, u32 psn)
+{
+ qp->s_last_psn = psn;
+}
+
+/*
+ * Generate a SWQE completion.
+ * This is similar to hfi1_send_complete but has to check to be sure
+ * that the SGEs are not being referenced if the SWQE is being resent.
+ */
+static struct hfi1_swqe *do_rc_completion(struct hfi1_qp *qp,
+ struct hfi1_swqe *wqe,
+ struct hfi1_ibport *ibp)
+{
+ struct ib_wc wc;
+ unsigned i;
+
+ /*
+ * Don't decrement refcount and don't generate a
+ * completion if the SWQE is being resent until the send
+ * is finished.
+ */
+ if (cmp_psn(wqe->lpsn, qp->s_sending_psn) < 0 ||
+ cmp_psn(qp->s_sending_psn, qp->s_sending_hpsn) > 0) {
+ for (i = 0; i < wqe->wr.num_sge; i++) {
+ struct hfi1_sge *sge = &wqe->sg_list[i];
+
+ hfi1_put_mr(sge->mr);
+ }
+ /* Post a send completion queue entry if requested. */
+ if (!(qp->s_flags & HFI1_S_SIGNAL_REQ_WR) ||
+ (wqe->wr.send_flags & IB_SEND_SIGNALED)) {
+ memset(&wc, 0, sizeof(wc));
+ wc.wr_id = wqe->wr.wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = ib_hfi1_wc_opcode[wqe->wr.opcode];
+ wc.byte_len = wqe->length;
+ wc.qp = &qp->ibqp;
+ hfi1_cq_enter(to_icq(qp->ibqp.send_cq), &wc, 0);
+ }
+ if (++qp->s_last >= qp->s_size)
+ qp->s_last = 0;
+ } else {
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+
+ this_cpu_inc(*ibp->rc_delayed_comp);
+ /*
+ * If send progress not running attempt to progress
+ * SDMA queue.
+ */
+ if (ppd->dd->flags & HFI1_HAS_SEND_DMA) {
+ struct sdma_engine *engine;
+ u8 sc5;
+
+ /* For now use sc to find engine */
+ sc5 = ibp->sl_to_sc[qp->remote_ah_attr.sl];
+ engine = qp_to_sdma_engine(qp, sc5);
+ sdma_engine_progress_schedule(engine);
+ }
+ }
+
+ qp->s_retry = qp->s_retry_cnt;
+ update_last_psn(qp, wqe->lpsn);
+
+ /*
+ * If we are completing a request which is in the process of
+ * being resent, we can stop re-sending it since we know the
+ * responder has already seen it.
+ */
+ if (qp->s_acked == qp->s_cur) {
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ qp->s_acked = qp->s_cur;
+ wqe = get_swqe_ptr(qp, qp->s_cur);
+ if (qp->s_acked != qp->s_tail) {
+ qp->s_state = OP(SEND_LAST);
+ qp->s_psn = wqe->psn;
+ }
+ } else {
+ if (++qp->s_acked >= qp->s_size)
+ qp->s_acked = 0;
+ if (qp->state == IB_QPS_SQD && qp->s_acked == qp->s_cur)
+ qp->s_draining = 0;
+ wqe = get_swqe_ptr(qp, qp->s_acked);
+ }
+ return wqe;
+}
+
+/**
+ * do_rc_ack - process an incoming RC ACK
+ * @qp: the QP the ACK came in on
+ * @psn: the packet sequence number of the ACK
+ * @opcode: the opcode of the request that resulted in the ACK
+ *
+ * This is called from rc_rcv_resp() to process an incoming RC ACK
+ * for the given QP.
+ * Called at interrupt level with the QP s_lock held.
+ * Returns 1 if OK, 0 if current operation should be aborted (NAK).
+ */
+static int do_rc_ack(struct hfi1_qp *qp, u32 aeth, u32 psn, int opcode,
+ u64 val, struct hfi1_ctxtdata *rcd)
+{
+ struct hfi1_ibport *ibp;
+ enum ib_wc_status status;
+ struct hfi1_swqe *wqe;
+ int ret = 0;
+ u32 ack_psn;
+ int diff;
+
+ /* Remove QP from retry timer */
+ if (qp->s_flags & (HFI1_S_TIMER | HFI1_S_WAIT_RNR)) {
+ qp->s_flags &= ~(HFI1_S_TIMER | HFI1_S_WAIT_RNR);
+ del_timer(&qp->s_timer);
+ }
+
+ /*
+ * Note that NAKs implicitly ACK outstanding SEND and RDMA write
+ * requests and implicitly NAK RDMA read and atomic requests issued
+ * before the NAK'ed request. The MSN won't include the NAK'ed
+ * request but will include an ACK'ed request(s).
+ */
+ ack_psn = psn;
+ if (aeth >> 29)
+ ack_psn--;
+ wqe = get_swqe_ptr(qp, qp->s_acked);
+ ibp = to_iport(qp->ibqp.device, qp->port_num);
+
+ /*
+ * The MSN might be for a later WQE than the PSN indicates so
+ * only complete WQEs that the PSN finishes.
+ */
+ while ((diff = delta_psn(ack_psn, wqe->lpsn)) >= 0) {
+ /*
+ * RDMA_READ_RESPONSE_ONLY is a special case since
+ * we want to generate completion events for everything
+ * before the RDMA read, copy the data, then generate
+ * the completion for the read.
+ */
+ if (wqe->wr.opcode == IB_WR_RDMA_READ &&
+ opcode == OP(RDMA_READ_RESPONSE_ONLY) &&
+ diff == 0) {
+ ret = 1;
+ goto bail;
+ }
+ /*
+ * If this request is a RDMA read or atomic, and the ACK is
+ * for a later operation, this ACK NAKs the RDMA read or
+ * atomic. In other words, only a RDMA_READ_LAST or ONLY
+ * can ACK a RDMA read and likewise for atomic ops. Note
+ * that the NAK case can only happen if relaxed ordering is
+ * used and requests are sent after an RDMA read or atomic
+ * is sent but before the response is received.
+ */
+ if ((wqe->wr.opcode == IB_WR_RDMA_READ &&
+ (opcode != OP(RDMA_READ_RESPONSE_LAST) || diff != 0)) ||
+ ((wqe->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
+ wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD) &&
+ (opcode != OP(ATOMIC_ACKNOWLEDGE) || diff != 0))) {
+ /* Retry this request. */
+ if (!(qp->r_flags & HFI1_R_RDMAR_SEQ)) {
+ qp->r_flags |= HFI1_R_RDMAR_SEQ;
+ restart_rc(qp, qp->s_last_psn + 1, 0);
+ if (list_empty(&qp->rspwait)) {
+ qp->r_flags |= HFI1_R_RSP_SEND;
+ atomic_inc(&qp->refcount);
+ list_add_tail(&qp->rspwait,
+ &rcd->qp_wait_list);
+ }
+ }
+ /*
+ * No need to process the ACK/NAK since we are
+ * restarting an earlier request.
+ */
+ goto bail;
+ }
+ if (wqe->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
+ wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
+ u64 *vaddr = wqe->sg_list[0].vaddr;
+ *vaddr = val;
+ }
+ if (qp->s_num_rd_atomic &&
+ (wqe->wr.opcode == IB_WR_RDMA_READ ||
+ wqe->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
+ wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD)) {
+ qp->s_num_rd_atomic--;
+ /* Restart sending task if fence is complete */
+ if ((qp->s_flags & HFI1_S_WAIT_FENCE) &&
+ !qp->s_num_rd_atomic) {
+ qp->s_flags &= ~(HFI1_S_WAIT_FENCE |
+ HFI1_S_WAIT_ACK);
+ hfi1_schedule_send(qp);
+ } else if (qp->s_flags & HFI1_S_WAIT_RDMAR) {
+ qp->s_flags &= ~(HFI1_S_WAIT_RDMAR |
+ HFI1_S_WAIT_ACK);
+ hfi1_schedule_send(qp);
+ }
+ }
+ wqe = do_rc_completion(qp, wqe, ibp);
+ if (qp->s_acked == qp->s_tail)
+ break;
+ }
+
+ switch (aeth >> 29) {
+ case 0: /* ACK */
+ this_cpu_inc(*ibp->rc_acks);
+ if (qp->s_acked != qp->s_tail) {
+ /*
+ * We are expecting more ACKs so
+ * reset the re-transmit timer.
+ */
+ start_timer(qp);
+ /*
+ * We can stop re-sending the earlier packets and
+ * continue with the next packet the receiver wants.
+ */
+ if (cmp_psn(qp->s_psn, psn) <= 0)
+ reset_psn(qp, psn + 1);
+ } else if (cmp_psn(qp->s_psn, psn) <= 0) {
+ qp->s_state = OP(SEND_LAST);
+ qp->s_psn = psn + 1;
+ }
+ if (qp->s_flags & HFI1_S_WAIT_ACK) {
+ qp->s_flags &= ~HFI1_S_WAIT_ACK;
+ hfi1_schedule_send(qp);
+ }
+ hfi1_get_credit(qp, aeth);
+ qp->s_rnr_retry = qp->s_rnr_retry_cnt;
+ qp->s_retry = qp->s_retry_cnt;
+ update_last_psn(qp, psn);
+ ret = 1;
+ goto bail;
+
+ case 1: /* RNR NAK */
+ ibp->n_rnr_naks++;
+ if (qp->s_acked == qp->s_tail)
+ goto bail;
+ if (qp->s_flags & HFI1_S_WAIT_RNR)
+ goto bail;
+ if (qp->s_rnr_retry == 0) {
+ status = IB_WC_RNR_RETRY_EXC_ERR;
+ goto class_b;
+ }
+ if (qp->s_rnr_retry_cnt < 7)
+ qp->s_rnr_retry--;
+
+ /* The last valid PSN is the previous PSN. */
+ update_last_psn(qp, psn - 1);
+
+ ibp->n_rc_resends += delta_psn(qp->s_psn, psn);
+
+ reset_psn(qp, psn);
+
+ qp->s_flags &= ~(HFI1_S_WAIT_SSN_CREDIT | HFI1_S_WAIT_ACK);
+ qp->s_flags |= HFI1_S_WAIT_RNR;
+ qp->s_timer.function = hfi1_rc_rnr_retry;
+ qp->s_timer.expires = jiffies + usecs_to_jiffies(
+ ib_hfi1_rnr_table[(aeth >> HFI1_AETH_CREDIT_SHIFT) &
+ HFI1_AETH_CREDIT_MASK]);
+ add_timer(&qp->s_timer);
+ goto bail;
+
+ case 3: /* NAK */
+ if (qp->s_acked == qp->s_tail)
+ goto bail;
+ /* The last valid PSN is the previous PSN. */
+ update_last_psn(qp, psn - 1);
+ switch ((aeth >> HFI1_AETH_CREDIT_SHIFT) &
+ HFI1_AETH_CREDIT_MASK) {
+ case 0: /* PSN sequence error */
+ ibp->n_seq_naks++;
+ /*
+ * Back up to the responder's expected PSN.
+ * Note that we might get a NAK in the middle of an
+ * RDMA READ response which terminates the RDMA
+ * READ.
+ */
+ restart_rc(qp, psn, 0);
+ hfi1_schedule_send(qp);
+ break;
+
+ case 1: /* Invalid Request */
+ status = IB_WC_REM_INV_REQ_ERR;
+ ibp->n_other_naks++;
+ goto class_b;
+
+ case 2: /* Remote Access Error */
+ status = IB_WC_REM_ACCESS_ERR;
+ ibp->n_other_naks++;
+ goto class_b;
+
+ case 3: /* Remote Operation Error */
+ status = IB_WC_REM_OP_ERR;
+ ibp->n_other_naks++;
+class_b:
+ if (qp->s_last == qp->s_acked) {
+ hfi1_send_complete(qp, wqe, status);
+ hfi1_error_qp(qp, IB_WC_WR_FLUSH_ERR);
+ }
+ break;
+
+ default:
+ /* Ignore other reserved NAK error codes */
+ goto reserved;
+ }
+ qp->s_retry = qp->s_retry_cnt;
+ qp->s_rnr_retry = qp->s_rnr_retry_cnt;
+ goto bail;
+
+ default: /* 2: reserved */
+reserved:
+ /* Ignore reserved NAK codes. */
+ goto bail;
+ }
+
+bail:
+ return ret;
+}
+
+/*
+ * We have seen an out of sequence RDMA read middle or last packet.
+ * This ACKs SENDs and RDMA writes up to the first RDMA read or atomic SWQE.
+ */
+static void rdma_seq_err(struct hfi1_qp *qp, struct hfi1_ibport *ibp, u32 psn,
+ struct hfi1_ctxtdata *rcd)
+{
+ struct hfi1_swqe *wqe;
+
+ /* Remove QP from retry timer */
+ if (qp->s_flags & (HFI1_S_TIMER | HFI1_S_WAIT_RNR)) {
+ qp->s_flags &= ~(HFI1_S_TIMER | HFI1_S_WAIT_RNR);
+ del_timer(&qp->s_timer);
+ }
+
+ wqe = get_swqe_ptr(qp, qp->s_acked);
+
+ while (cmp_psn(psn, wqe->lpsn) > 0) {
+ if (wqe->wr.opcode == IB_WR_RDMA_READ ||
+ wqe->wr.opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
+ wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD)
+ break;
+ wqe = do_rc_completion(qp, wqe, ibp);
+ }
+
+ ibp->n_rdma_seq++;
+ qp->r_flags |= HFI1_R_RDMAR_SEQ;
+ restart_rc(qp, qp->s_last_psn + 1, 0);
+ if (list_empty(&qp->rspwait)) {
+ qp->r_flags |= HFI1_R_RSP_SEND;
+ atomic_inc(&qp->refcount);
+ list_add_tail(&qp->rspwait, &rcd->qp_wait_list);
+ }
+}
+
+/**
+ * rc_rcv_resp - process an incoming RC response packet
+ * @ibp: the port this packet came in on
+ * @ohdr: the other headers for this packet
+ * @data: the packet data
+ * @tlen: the packet length
+ * @qp: the QP for this packet
+ * @opcode: the opcode for this packet
+ * @psn: the packet sequence number for this packet
+ * @hdrsize: the header length
+ * @pmtu: the path MTU
+ *
+ * This is called from hfi1_rc_rcv() to process an incoming RC response
+ * packet for the given QP.
+ * Called at interrupt level.
+ */
+static void rc_rcv_resp(struct hfi1_ibport *ibp,
+ struct hfi1_other_headers *ohdr,
+ void *data, u32 tlen, struct hfi1_qp *qp,
+ u32 opcode, u32 psn, u32 hdrsize, u32 pmtu,
+ struct hfi1_ctxtdata *rcd)
+{
+ struct hfi1_swqe *wqe;
+ enum ib_wc_status status;
+ unsigned long flags;
+ int diff;
+ u32 pad;
+ u32 aeth;
+ u64 val;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ /* Ignore invalid responses. */
+ if (cmp_psn(psn, qp->s_next_psn) >= 0)
+ goto ack_done;
+
+ /* Ignore duplicate responses. */
+ diff = cmp_psn(psn, qp->s_last_psn);
+ if (unlikely(diff <= 0)) {
+ /* Update credits for "ghost" ACKs */
+ if (diff == 0 && opcode == OP(ACKNOWLEDGE)) {
+ aeth = be32_to_cpu(ohdr->u.aeth);
+ if ((aeth >> 29) == 0)
+ hfi1_get_credit(qp, aeth);
+ }
+ goto ack_done;
+ }
+
+ /*
+ * Skip everything other than the PSN we expect, if we are waiting
+ * for a reply to a restarted RDMA read or atomic op.
+ */
+ if (qp->r_flags & HFI1_R_RDMAR_SEQ) {
+ if (cmp_psn(psn, qp->s_last_psn + 1) != 0)
+ goto ack_done;
+ qp->r_flags &= ~HFI1_R_RDMAR_SEQ;
+ }
+
+ if (unlikely(qp->s_acked == qp->s_tail))
+ goto ack_done;
+ wqe = get_swqe_ptr(qp, qp->s_acked);
+ status = IB_WC_SUCCESS;
+
+ switch (opcode) {
+ case OP(ACKNOWLEDGE):
+ case OP(ATOMIC_ACKNOWLEDGE):
+ case OP(RDMA_READ_RESPONSE_FIRST):
+ aeth = be32_to_cpu(ohdr->u.aeth);
+ if (opcode == OP(ATOMIC_ACKNOWLEDGE)) {
+ __be32 *p = ohdr->u.at.atomic_ack_eth;
+
+ val = ((u64) be32_to_cpu(p[0]) << 32) |
+ be32_to_cpu(p[1]);
+ } else
+ val = 0;
+ if (!do_rc_ack(qp, aeth, psn, opcode, val, rcd) ||
+ opcode != OP(RDMA_READ_RESPONSE_FIRST))
+ goto ack_done;
+ wqe = get_swqe_ptr(qp, qp->s_acked);
+ if (unlikely(wqe->wr.opcode != IB_WR_RDMA_READ))
+ goto ack_op_err;
+ /*
+ * If this is a response to a resent RDMA read, we
+ * have to be careful to copy the data to the right
+ * location.
+ */
+ qp->s_rdma_read_len = restart_sge(&qp->s_rdma_read_sge,
+ wqe, psn, pmtu);
+ goto read_middle;
+
+ case OP(RDMA_READ_RESPONSE_MIDDLE):
+ /* no AETH, no ACK */
+ if (unlikely(cmp_psn(psn, qp->s_last_psn + 1)))
+ goto ack_seq_err;
+ if (unlikely(wqe->wr.opcode != IB_WR_RDMA_READ))
+ goto ack_op_err;
+read_middle:
+ if (unlikely(tlen != (hdrsize + pmtu + 4)))
+ goto ack_len_err;
+ if (unlikely(pmtu >= qp->s_rdma_read_len))
+ goto ack_len_err;
+
+ /*
+ * We got a response so update the timeout.
+ * 4.096 usec. * (1 << qp->timeout)
+ */
+ qp->s_flags |= HFI1_S_TIMER;
+ mod_timer(&qp->s_timer, jiffies + qp->timeout_jiffies);
+ if (qp->s_flags & HFI1_S_WAIT_ACK) {
+ qp->s_flags &= ~HFI1_S_WAIT_ACK;
+ hfi1_schedule_send(qp);
+ }
+
+ if (opcode == OP(RDMA_READ_RESPONSE_MIDDLE))
+ qp->s_retry = qp->s_retry_cnt;
+
+ /*
+ * Update the RDMA receive state but do the copy w/o
+ * holding the locks and blocking interrupts.
+ */
+ qp->s_rdma_read_len -= pmtu;
+ update_last_psn(qp, psn);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ hfi1_copy_sge(&qp->s_rdma_read_sge, data, pmtu, 0);
+ goto bail;
+
+ case OP(RDMA_READ_RESPONSE_ONLY):
+ aeth = be32_to_cpu(ohdr->u.aeth);
+ if (!do_rc_ack(qp, aeth, psn, opcode, 0, rcd))
+ goto ack_done;
+ /* Get the number of bytes the message was padded by. */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ /*
+ * Check that the data size is >= 0 && <= pmtu.
+ * Remember to account for ICRC (4).
+ */
+ if (unlikely(tlen < (hdrsize + pad + 4)))
+ goto ack_len_err;
+ /*
+ * If this is a response to a resent RDMA read, we
+ * have to be careful to copy the data to the right
+ * location.
+ */
+ wqe = get_swqe_ptr(qp, qp->s_acked);
+ qp->s_rdma_read_len = restart_sge(&qp->s_rdma_read_sge,
+ wqe, psn, pmtu);
+ goto read_last;
+
+ case OP(RDMA_READ_RESPONSE_LAST):
+ /* ACKs READ req. */
+ if (unlikely(cmp_psn(psn, qp->s_last_psn + 1)))
+ goto ack_seq_err;
+ if (unlikely(wqe->wr.opcode != IB_WR_RDMA_READ))
+ goto ack_op_err;
+ /* Get the number of bytes the message was padded by. */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ /*
+ * Check that the data size is >= 1 && <= pmtu.
+ * Remember to account for ICRC (4).
+ */
+ if (unlikely(tlen <= (hdrsize + pad + 4)))
+ goto ack_len_err;
+read_last:
+ tlen -= hdrsize + pad + 4;
+ if (unlikely(tlen != qp->s_rdma_read_len))
+ goto ack_len_err;
+ aeth = be32_to_cpu(ohdr->u.aeth);
+ hfi1_copy_sge(&qp->s_rdma_read_sge, data, tlen, 0);
+ WARN_ON(qp->s_rdma_read_sge.num_sge);
+ (void) do_rc_ack(qp, aeth, psn,
+ OP(RDMA_READ_RESPONSE_LAST), 0, rcd);
+ goto ack_done;
+ }
+
+ack_op_err:
+ status = IB_WC_LOC_QP_OP_ERR;
+ goto ack_err;
+
+ack_seq_err:
+ rdma_seq_err(qp, ibp, psn, rcd);
+ goto ack_done;
+
+ack_len_err:
+ status = IB_WC_LOC_LEN_ERR;
+ack_err:
+ if (qp->s_last == qp->s_acked) {
+ hfi1_send_complete(qp, wqe, status);
+ hfi1_error_qp(qp, IB_WC_WR_FLUSH_ERR);
+ }
+ack_done:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+bail:
+ return;
+}
+
+/**
+ * rc_rcv_error - process an incoming duplicate or error RC packet
+ * @ohdr: the other headers for this packet
+ * @data: the packet data
+ * @qp: the QP for this packet
+ * @opcode: the opcode for this packet
+ * @psn: the packet sequence number for this packet
+ * @diff: the difference between the PSN and the expected PSN
+ *
+ * This is called from hfi1_rc_rcv() to process an unexpected
+ * incoming RC packet for the given QP.
+ * Called at interrupt level.
+ * Return 1 if no more processing is needed; otherwise return 0 to
+ * schedule a response to be sent.
+ */
+static noinline int rc_rcv_error(struct hfi1_other_headers *ohdr, void *data,
+ struct hfi1_qp *qp, u32 opcode, u32 psn, int diff,
+ struct hfi1_ctxtdata *rcd)
+{
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_ack_entry *e;
+ unsigned long flags;
+ u8 i, prev;
+ int old_req;
+
+ if (diff > 0) {
+ /*
+ * Packet sequence error.
+ * A NAK will ACK earlier sends and RDMA writes.
+ * Don't queue the NAK if we already sent one.
+ */
+ if (!qp->r_nak_state) {
+ ibp->n_rc_seqnak++;
+ qp->r_nak_state = IB_NAK_PSN_ERROR;
+ /* Use the expected PSN. */
+ qp->r_ack_psn = qp->r_psn;
+ /*
+ * Wait to send the sequence NAK until all packets
+ * in the receive queue have been processed.
+ * Otherwise, we end up propagating congestion.
+ */
+ if (list_empty(&qp->rspwait)) {
+ qp->r_flags |= HFI1_R_RSP_NAK;
+ atomic_inc(&qp->refcount);
+ list_add_tail(&qp->rspwait, &rcd->qp_wait_list);
+ }
+ }
+ goto done;
+ }
+
+ /*
+ * Handle a duplicate request. Don't re-execute SEND, RDMA
+ * write or atomic op. Don't NAK errors, just silently drop
+ * the duplicate request. Note that r_sge, r_len, and
+ * r_rcv_len may be in use so don't modify them.
+ *
+ * We are supposed to ACK the earliest duplicate PSN but we
+ * can coalesce an outstanding duplicate ACK. We have to
+ * send the earliest so that RDMA reads can be restarted at
+ * the requester's expected PSN.
+ *
+ * First, find where this duplicate PSN falls within the
+ * ACKs previously sent.
+ * old_req is true if there is an older response that is scheduled
+ * to be sent before sending this one.
+ */
+ e = NULL;
+ old_req = 1;
+ ibp->n_rc_dupreq++;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ for (i = qp->r_head_ack_queue; ; i = prev) {
+ if (i == qp->s_tail_ack_queue)
+ old_req = 0;
+ if (i)
+ prev = i - 1;
+ else
+ prev = HFI1_MAX_RDMA_ATOMIC;
+ if (prev == qp->r_head_ack_queue) {
+ e = NULL;
+ break;
+ }
+ e = &qp->s_ack_queue[prev];
+ if (!e->opcode) {
+ e = NULL;
+ break;
+ }
+ if (cmp_psn(psn, e->psn) >= 0) {
+ if (prev == qp->s_tail_ack_queue &&
+ cmp_psn(psn, e->lpsn) <= 0)
+ old_req = 0;
+ break;
+ }
+ }
+ switch (opcode) {
+ case OP(RDMA_READ_REQUEST): {
+ struct ib_reth *reth;
+ u32 offset;
+ u32 len;
+
+ /*
+ * If we didn't find the RDMA read request in the ack queue,
+ * we can ignore this request.
+ */
+ if (!e || e->opcode != OP(RDMA_READ_REQUEST))
+ goto unlock_done;
+ /* RETH comes after BTH */
+ reth = &ohdr->u.rc.reth;
+ /*
+ * Address range must be a subset of the original
+ * request and start on pmtu boundaries.
+ * We reuse the old ack_queue slot since the requester
+ * should not back up and request an earlier PSN for the
+ * same request.
+ */
+ offset = delta_psn(psn, e->psn) * qp->pmtu;
+ len = be32_to_cpu(reth->length);
+ if (unlikely(offset + len != e->rdma_sge.sge_length))
+ goto unlock_done;
+ if (e->rdma_sge.mr) {
+ hfi1_put_mr(e->rdma_sge.mr);
+ e->rdma_sge.mr = NULL;
+ }
+ if (len != 0) {
+ u32 rkey = be32_to_cpu(reth->rkey);
+ u64 vaddr = be64_to_cpu(reth->vaddr);
+ int ok;
+
+ ok = hfi1_rkey_ok(qp, &e->rdma_sge, len, vaddr, rkey,
+ IB_ACCESS_REMOTE_READ);
+ if (unlikely(!ok))
+ goto unlock_done;
+ } else {
+ e->rdma_sge.vaddr = NULL;
+ e->rdma_sge.length = 0;
+ e->rdma_sge.sge_length = 0;
+ }
+ e->psn = psn;
+ if (old_req)
+ goto unlock_done;
+ qp->s_tail_ack_queue = prev;
+ break;
+ }
+
+ case OP(COMPARE_SWAP):
+ case OP(FETCH_ADD): {
+ /*
+ * If we didn't find the atomic request in the ack queue
+ * or the send tasklet is already backed up to send an
+ * earlier entry, we can ignore this request.
+ */
+ if (!e || e->opcode != (u8) opcode || old_req)
+ goto unlock_done;
+ qp->s_tail_ack_queue = prev;
+ break;
+ }
+
+ default:
+ /*
+ * Ignore this operation if it doesn't request an ACK
+ * or an earlier RDMA read or atomic is going to be resent.
+ */
+ if (!(psn & IB_BTH_REQ_ACK) || old_req)
+ goto unlock_done;
+ /*
+ * Resend the most recent ACK if this request is
+ * after all the previous RDMA reads and atomics.
+ */
+ if (i == qp->r_head_ack_queue) {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ qp->r_nak_state = 0;
+ qp->r_ack_psn = qp->r_psn - 1;
+ goto send_ack;
+ }
+
+ /*
+ * Resend the RDMA read or atomic op which
+ * ACKs this duplicate request.
+ */
+ qp->s_tail_ack_queue = i;
+ break;
+ }
+ qp->s_ack_state = OP(ACKNOWLEDGE);
+ qp->s_flags |= HFI1_S_RESP_PENDING;
+ qp->r_nak_state = 0;
+ hfi1_schedule_send(qp);
+
+unlock_done:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+done:
+ return 1;
+
+send_ack:
+ return 0;
+}
+
+void hfi1_rc_error(struct hfi1_qp *qp, enum ib_wc_status err)
+{
+ unsigned long flags;
+ int lastwqe;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+ lastwqe = hfi1_error_qp(qp, err);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+
+ if (lastwqe) {
+ struct ib_event ev;
+
+ ev.device = qp->ibqp.device;
+ ev.element.qp = &qp->ibqp;
+ ev.event = IB_EVENT_QP_LAST_WQE_REACHED;
+ qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
+ }
+}
+
+static inline void update_ack_queue(struct hfi1_qp *qp, unsigned n)
+{
+ unsigned next;
+
+ next = n + 1;
+ if (next > HFI1_MAX_RDMA_ATOMIC)
+ next = 0;
+ qp->s_tail_ack_queue = next;
+ qp->s_ack_state = OP(ACKNOWLEDGE);
+}
+
+static void log_cca_event(struct hfi1_pportdata *ppd, u8 sl, u32 rlid,
+ u32 lqpn, u32 rqpn, u8 svc_type)
+{
+ struct opa_hfi1_cong_log_event_internal *cc_event;
+
+ if (sl >= OPA_MAX_SLS)
+ return;
+
+ spin_lock(&ppd->cc_log_lock);
+
+ ppd->threshold_cong_event_map[sl/8] |= 1 << (sl % 8);
+ ppd->threshold_event_counter++;
+
+ cc_event = &ppd->cc_events[ppd->cc_log_idx++];
+ if (ppd->cc_log_idx == OPA_CONG_LOG_ELEMS)
+ ppd->cc_log_idx = 0;
+ cc_event->lqpn = lqpn & HFI1_QPN_MASK;
+ cc_event->rqpn = rqpn & HFI1_QPN_MASK;
+ cc_event->sl = sl;
+ cc_event->svc_type = svc_type;
+ cc_event->rlid = rlid;
+ /* keep timestamp in units of 1.024 usec */
+ cc_event->timestamp = ktime_to_ns(ktime_get()) / 1024;
+
+ spin_unlock(&ppd->cc_log_lock);
+}
+
+void process_becn(struct hfi1_pportdata *ppd, u8 sl, u16 rlid, u32 lqpn,
+ u32 rqpn, u8 svc_type)
+{
+ struct cca_timer *cca_timer;
+ u16 ccti, ccti_incr, ccti_timer, ccti_limit;
+ u8 trigger_threshold;
+ struct cc_state *cc_state;
+
+ if (sl >= OPA_MAX_SLS)
+ return;
+
+ cca_timer = &ppd->cca_timer[sl];
+
+ cc_state = get_cc_state(ppd);
+
+ if (cc_state == NULL)
+ return;
+
+ /*
+ * 1) increase CCTI (for this SL)
+ * 2) select IPG (i.e., call set_link_ipg())
+ * 3) start timer
+ */
+ ccti_limit = cc_state->cct.ccti_limit;
+ ccti_incr = cc_state->cong_setting.entries[sl].ccti_increase;
+ ccti_timer = cc_state->cong_setting.entries[sl].ccti_timer;
+ trigger_threshold =
+ cc_state->cong_setting.entries[sl].trigger_threshold;
+
+ spin_lock(&ppd->cca_timer_lock);
+
+ if (cca_timer->ccti < ccti_limit) {
+ if (cca_timer->ccti + ccti_incr <= ccti_limit)
+ cca_timer->ccti += ccti_incr;
+ else
+ cca_timer->ccti = ccti_limit;
+ set_link_ipg(ppd);
+ }
+
+ spin_unlock(&ppd->cca_timer_lock);
+
+ ccti = cca_timer->ccti;
+
+ if (!hrtimer_active(&cca_timer->hrtimer)) {
+ /* ccti_timer is in units of 1.024 usec */
+ unsigned long nsec = 1024 * ccti_timer;
+
+ hrtimer_start(&cca_timer->hrtimer, ns_to_ktime(nsec),
+ HRTIMER_MODE_REL);
+ }
+
+ if ((trigger_threshold != 0) && (ccti >= trigger_threshold))
+ log_cca_event(ppd, sl, rlid, lqpn, rqpn, svc_type);
+}
+
+/**
+ * hfi1_rc_rcv - process an incoming RC packet
+ * @rcd: the context pointer
+ * @hdr: the header of this packet
+ * @rcv_flags: flags relevant to rcv processing
+ * @data: the packet data
+ * @tlen: the packet length
+ * @qp: the QP for this packet
+ *
+ * This is called from qp_rcv() to process an incoming RC packet
+ * for the given QP.
+ * Called at interrupt level.
+ */
+void hfi1_rc_rcv(struct hfi1_packet *packet)
+{
+ struct hfi1_ctxtdata *rcd = packet->rcd;
+ struct hfi1_ib_header *hdr = packet->hdr;
+ u32 rcv_flags = packet->rcv_flags;
+ void *data = packet->ebuf;
+ u32 tlen = packet->tlen;
+ struct hfi1_qp *qp = packet->qp;
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ struct hfi1_other_headers *ohdr = packet->ohdr;
+ u32 bth0, opcode;
+ u32 hdrsize = packet->hlen;
+ u32 psn;
+ u32 pad;
+ struct ib_wc wc;
+ u32 pmtu = qp->pmtu;
+ int diff;
+ struct ib_reth *reth;
+ unsigned long flags;
+ u32 bth1;
+ int ret, is_fecn = 0;
+
+ bth0 = be32_to_cpu(ohdr->bth[0]);
+ if (hfi1_ruc_check_hdr(ibp, hdr, rcv_flags & HFI1_HAS_GRH, qp, bth0))
+ return;
+
+ bth1 = be32_to_cpu(ohdr->bth[1]);
+ if (unlikely(bth1 & (HFI1_BECN_SMASK | HFI1_FECN_SMASK))) {
+ if (bth1 & HFI1_BECN_SMASK) {
+ u16 rlid = qp->remote_ah_attr.dlid;
+ u32 lqpn, rqpn;
+
+ lqpn = qp->ibqp.qp_num;
+ rqpn = qp->remote_qpn;
+ process_becn(
+ ppd,
+ qp->remote_ah_attr.sl,
+ rlid, lqpn, rqpn,
+ IB_CC_SVCTYPE_RC);
+ }
+ is_fecn = bth1 & HFI1_FECN_SMASK;
+ }
+
+ psn = be32_to_cpu(ohdr->bth[2]);
+ opcode = bth0 >> 24;
+
+ /*
+ * Process responses (ACKs) before anything else. Note that the
+ * packet sequence number will be for something in the send work
+ * queue rather than the expected receive packet sequence number.
+ * In other words, this QP is the requester.
+ */
+ if (opcode >= OP(RDMA_READ_RESPONSE_FIRST) &&
+ opcode <= OP(ATOMIC_ACKNOWLEDGE)) {
+ rc_rcv_resp(ibp, ohdr, data, tlen, qp, opcode, psn,
+ hdrsize, pmtu, rcd);
+ if (is_fecn)
+ goto send_ack;
+ return;
+ }
+
+ /* Compute 24 bits worth of difference. */
+ diff = delta_psn(psn, qp->r_psn);
+ if (unlikely(diff)) {
+ if (rc_rcv_error(ohdr, data, qp, opcode, psn, diff, rcd))
+ return;
+ goto send_ack;
+ }
+
+ /* Check for opcode sequence errors. */
+ switch (qp->r_state) {
+ case OP(SEND_FIRST):
+ case OP(SEND_MIDDLE):
+ if (opcode == OP(SEND_MIDDLE) ||
+ opcode == OP(SEND_LAST) ||
+ opcode == OP(SEND_LAST_WITH_IMMEDIATE))
+ break;
+ goto nack_inv;
+
+ case OP(RDMA_WRITE_FIRST):
+ case OP(RDMA_WRITE_MIDDLE):
+ if (opcode == OP(RDMA_WRITE_MIDDLE) ||
+ opcode == OP(RDMA_WRITE_LAST) ||
+ opcode == OP(RDMA_WRITE_LAST_WITH_IMMEDIATE))
+ break;
+ goto nack_inv;
+
+ default:
+ if (opcode == OP(SEND_MIDDLE) ||
+ opcode == OP(SEND_LAST) ||
+ opcode == OP(SEND_LAST_WITH_IMMEDIATE) ||
+ opcode == OP(RDMA_WRITE_MIDDLE) ||
+ opcode == OP(RDMA_WRITE_LAST) ||
+ opcode == OP(RDMA_WRITE_LAST_WITH_IMMEDIATE))
+ goto nack_inv;
+ /*
+ * Note that it is up to the requester to not send a new
+ * RDMA read or atomic operation before receiving an ACK
+ * for the previous operation.
+ */
+ break;
+ }
+
+ if (qp->state == IB_QPS_RTR && !(qp->r_flags & HFI1_R_COMM_EST))
+ qp_comm_est(qp);
+
+ /* OK, process the packet. */
+ switch (opcode) {
+ case OP(SEND_FIRST):
+ ret = hfi1_get_rwqe(qp, 0);
+ if (ret < 0)
+ goto nack_op_err;
+ if (!ret)
+ goto rnr_nak;
+ qp->r_rcv_len = 0;
+ /* FALLTHROUGH */
+ case OP(SEND_MIDDLE):
+ case OP(RDMA_WRITE_MIDDLE):
+send_middle:
+ /* Check for invalid length PMTU or posted rwqe len. */
+ if (unlikely(tlen != (hdrsize + pmtu + 4)))
+ goto nack_inv;
+ qp->r_rcv_len += pmtu;
+ if (unlikely(qp->r_rcv_len > qp->r_len))
+ goto nack_inv;
+ hfi1_copy_sge(&qp->r_sge, data, pmtu, 1);
+ break;
+
+ case OP(RDMA_WRITE_LAST_WITH_IMMEDIATE):
+ /* consume RWQE */
+ ret = hfi1_get_rwqe(qp, 1);
+ if (ret < 0)
+ goto nack_op_err;
+ if (!ret)
+ goto rnr_nak;
+ goto send_last_imm;
+
+ case OP(SEND_ONLY):
+ case OP(SEND_ONLY_WITH_IMMEDIATE):
+ ret = hfi1_get_rwqe(qp, 0);
+ if (ret < 0)
+ goto nack_op_err;
+ if (!ret)
+ goto rnr_nak;
+ qp->r_rcv_len = 0;
+ if (opcode == OP(SEND_ONLY))
+ goto no_immediate_data;
+ /* FALLTHROUGH for SEND_ONLY_WITH_IMMEDIATE */
+ case OP(SEND_LAST_WITH_IMMEDIATE):
+send_last_imm:
+ wc.ex.imm_data = ohdr->u.imm_data;
+ wc.wc_flags = IB_WC_WITH_IMM;
+ goto send_last;
+ case OP(SEND_LAST):
+ case OP(RDMA_WRITE_LAST):
+no_immediate_data:
+ wc.wc_flags = 0;
+ wc.ex.imm_data = 0;
+send_last:
+ /* Get the number of bytes the message was padded by. */
+ pad = (bth0 >> 20) & 3;
+ /* Check for invalid length. */
+ /* LAST len should be >= 1 */
+ if (unlikely(tlen < (hdrsize + pad + 4)))
+ goto nack_inv;
+ /* Don't count the CRC. */
+ tlen -= (hdrsize + pad + 4);
+ wc.byte_len = tlen + qp->r_rcv_len;
+ if (unlikely(wc.byte_len > qp->r_len))
+ goto nack_inv;
+ hfi1_copy_sge(&qp->r_sge, data, tlen, 1);
+ hfi1_put_ss(&qp->r_sge);
+ qp->r_msn++;
+ if (!test_and_clear_bit(HFI1_R_WRID_VALID, &qp->r_aflags))
+ break;
+ wc.wr_id = qp->r_wr_id;
+ wc.status = IB_WC_SUCCESS;
+ if (opcode == OP(RDMA_WRITE_LAST_WITH_IMMEDIATE) ||
+ opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE))
+ wc.opcode = IB_WC_RECV_RDMA_WITH_IMM;
+ else
+ wc.opcode = IB_WC_RECV;
+ wc.qp = &qp->ibqp;
+ wc.src_qp = qp->remote_qpn;
+ wc.slid = qp->remote_ah_attr.dlid;
+ /*
+ * It seems that IB mandates the presence of an SL in a
+ * work completion only for the UD transport (see section
+ * 11.4.2 of IBTA Vol. 1).
+ *
+ * However, the way the SL is chosen below is consistent
+ * with the way that IB/qib works and is trying avoid
+ * introducing incompatibilities.
+ *
+ * See also OPA Vol. 1, section 9.7.6, and table 9-17.
+ */
+ wc.sl = qp->remote_ah_attr.sl;
+ /* zero fields that are N/A */
+ wc.vendor_err = 0;
+ wc.pkey_index = 0;
+ wc.dlid_path_bits = 0;
+ wc.port_num = 0;
+ /* Signal completion event if the solicited bit is set. */
+ hfi1_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
+ (bth0 & IB_BTH_SOLICITED) != 0);
+ break;
+
+ case OP(RDMA_WRITE_FIRST):
+ case OP(RDMA_WRITE_ONLY):
+ case OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE):
+ if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_WRITE)))
+ goto nack_inv;
+ /* consume RWQE */
+ reth = &ohdr->u.rc.reth;
+ qp->r_len = be32_to_cpu(reth->length);
+ qp->r_rcv_len = 0;
+ qp->r_sge.sg_list = NULL;
+ if (qp->r_len != 0) {
+ u32 rkey = be32_to_cpu(reth->rkey);
+ u64 vaddr = be64_to_cpu(reth->vaddr);
+ int ok;
+
+ /* Check rkey & NAK */
+ ok = hfi1_rkey_ok(qp, &qp->r_sge.sge, qp->r_len, vaddr,
+ rkey, IB_ACCESS_REMOTE_WRITE);
+ if (unlikely(!ok))
+ goto nack_acc;
+ qp->r_sge.num_sge = 1;
+ } else {
+ qp->r_sge.num_sge = 0;
+ qp->r_sge.sge.mr = NULL;
+ qp->r_sge.sge.vaddr = NULL;
+ qp->r_sge.sge.length = 0;
+ qp->r_sge.sge.sge_length = 0;
+ }
+ if (opcode == OP(RDMA_WRITE_FIRST))
+ goto send_middle;
+ else if (opcode == OP(RDMA_WRITE_ONLY))
+ goto no_immediate_data;
+ ret = hfi1_get_rwqe(qp, 1);
+ if (ret < 0)
+ goto nack_op_err;
+ if (!ret)
+ goto rnr_nak;
+ wc.ex.imm_data = ohdr->u.rc.imm_data;
+ wc.wc_flags = IB_WC_WITH_IMM;
+ goto send_last;
+
+ case OP(RDMA_READ_REQUEST): {
+ struct hfi1_ack_entry *e;
+ u32 len;
+ u8 next;
+
+ if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_READ)))
+ goto nack_inv;
+ next = qp->r_head_ack_queue + 1;
+ /* s_ack_queue is size HFI1_MAX_RDMA_ATOMIC+1 so use > not >= */
+ if (next > HFI1_MAX_RDMA_ATOMIC)
+ next = 0;
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (unlikely(next == qp->s_tail_ack_queue)) {
+ if (!qp->s_ack_queue[next].sent)
+ goto nack_inv_unlck;
+ update_ack_queue(qp, next);
+ }
+ e = &qp->s_ack_queue[qp->r_head_ack_queue];
+ if (e->opcode == OP(RDMA_READ_REQUEST) && e->rdma_sge.mr) {
+ hfi1_put_mr(e->rdma_sge.mr);
+ e->rdma_sge.mr = NULL;
+ }
+ reth = &ohdr->u.rc.reth;
+ len = be32_to_cpu(reth->length);
+ if (len) {
+ u32 rkey = be32_to_cpu(reth->rkey);
+ u64 vaddr = be64_to_cpu(reth->vaddr);
+ int ok;
+
+ /* Check rkey & NAK */
+ ok = hfi1_rkey_ok(qp, &e->rdma_sge, len, vaddr,
+ rkey, IB_ACCESS_REMOTE_READ);
+ if (unlikely(!ok))
+ goto nack_acc_unlck;
+ /*
+ * Update the next expected PSN. We add 1 later
+ * below, so only add the remainder here.
+ */
+ if (len > pmtu)
+ qp->r_psn += (len - 1) / pmtu;
+ } else {
+ e->rdma_sge.mr = NULL;
+ e->rdma_sge.vaddr = NULL;
+ e->rdma_sge.length = 0;
+ e->rdma_sge.sge_length = 0;
+ }
+ e->opcode = opcode;
+ e->sent = 0;
+ e->psn = psn;
+ e->lpsn = qp->r_psn;
+ /*
+ * We need to increment the MSN here instead of when we
+ * finish sending the result since a duplicate request would
+ * increment it more than once.
+ */
+ qp->r_msn++;
+ qp->r_psn++;
+ qp->r_state = opcode;
+ qp->r_nak_state = 0;
+ qp->r_head_ack_queue = next;
+
+ /* Schedule the send tasklet. */
+ qp->s_flags |= HFI1_S_RESP_PENDING;
+ hfi1_schedule_send(qp);
+
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ if (is_fecn)
+ goto send_ack;
+ return;
+ }
+
+ case OP(COMPARE_SWAP):
+ case OP(FETCH_ADD): {
+ struct ib_atomic_eth *ateth;
+ struct hfi1_ack_entry *e;
+ u64 vaddr;
+ atomic64_t *maddr;
+ u64 sdata;
+ u32 rkey;
+ u8 next;
+
+ if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_ATOMIC)))
+ goto nack_inv;
+ next = qp->r_head_ack_queue + 1;
+ if (next > HFI1_MAX_RDMA_ATOMIC)
+ next = 0;
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (unlikely(next == qp->s_tail_ack_queue)) {
+ if (!qp->s_ack_queue[next].sent)
+ goto nack_inv_unlck;
+ update_ack_queue(qp, next);
+ }
+ e = &qp->s_ack_queue[qp->r_head_ack_queue];
+ if (e->opcode == OP(RDMA_READ_REQUEST) && e->rdma_sge.mr) {
+ hfi1_put_mr(e->rdma_sge.mr);
+ e->rdma_sge.mr = NULL;
+ }
+ ateth = &ohdr->u.atomic_eth;
+ vaddr = ((u64) be32_to_cpu(ateth->vaddr[0]) << 32) |
+ be32_to_cpu(ateth->vaddr[1]);
+ if (unlikely(vaddr & (sizeof(u64) - 1)))
+ goto nack_inv_unlck;
+ rkey = be32_to_cpu(ateth->rkey);
+ /* Check rkey & NAK */
+ if (unlikely(!hfi1_rkey_ok(qp, &qp->r_sge.sge, sizeof(u64),
+ vaddr, rkey,
+ IB_ACCESS_REMOTE_ATOMIC)))
+ goto nack_acc_unlck;
+ /* Perform atomic OP and save result. */
+ maddr = (atomic64_t *) qp->r_sge.sge.vaddr;
+ sdata = be64_to_cpu(ateth->swap_data);
+ e->atomic_data = (opcode == OP(FETCH_ADD)) ?
+ (u64) atomic64_add_return(sdata, maddr) - sdata :
+ (u64) cmpxchg((u64 *) qp->r_sge.sge.vaddr,
+ be64_to_cpu(ateth->compare_data),
+ sdata);
+ hfi1_put_mr(qp->r_sge.sge.mr);
+ qp->r_sge.num_sge = 0;
+ e->opcode = opcode;
+ e->sent = 0;
+ e->psn = psn;
+ e->lpsn = psn;
+ qp->r_msn++;
+ qp->r_psn++;
+ qp->r_state = opcode;
+ qp->r_nak_state = 0;
+ qp->r_head_ack_queue = next;
+
+ /* Schedule the send tasklet. */
+ qp->s_flags |= HFI1_S_RESP_PENDING;
+ hfi1_schedule_send(qp);
+
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ if (is_fecn)
+ goto send_ack;
+ return;
+ }
+
+ default:
+ /* NAK unknown opcodes. */
+ goto nack_inv;
+ }
+ qp->r_psn++;
+ qp->r_state = opcode;
+ qp->r_ack_psn = psn;
+ qp->r_nak_state = 0;
+ /* Send an ACK if requested or required. */
+ if (psn & (1 << 31))
+ goto send_ack;
+ return;
+
+rnr_nak:
+ qp->r_nak_state = IB_RNR_NAK | qp->r_min_rnr_timer;
+ qp->r_ack_psn = qp->r_psn;
+ /* Queue RNR NAK for later */
+ if (list_empty(&qp->rspwait)) {
+ qp->r_flags |= HFI1_R_RSP_NAK;
+ atomic_inc(&qp->refcount);
+ list_add_tail(&qp->rspwait, &rcd->qp_wait_list);
+ }
+ return;
+
+nack_op_err:
+ hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
+ qp->r_nak_state = IB_NAK_REMOTE_OPERATIONAL_ERROR;
+ qp->r_ack_psn = qp->r_psn;
+ /* Queue NAK for later */
+ if (list_empty(&qp->rspwait)) {
+ qp->r_flags |= HFI1_R_RSP_NAK;
+ atomic_inc(&qp->refcount);
+ list_add_tail(&qp->rspwait, &rcd->qp_wait_list);
+ }
+ return;
+
+nack_inv_unlck:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+nack_inv:
+ hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
+ qp->r_nak_state = IB_NAK_INVALID_REQUEST;
+ qp->r_ack_psn = qp->r_psn;
+ /* Queue NAK for later */
+ if (list_empty(&qp->rspwait)) {
+ qp->r_flags |= HFI1_R_RSP_NAK;
+ atomic_inc(&qp->refcount);
+ list_add_tail(&qp->rspwait, &rcd->qp_wait_list);
+ }
+ return;
+
+nack_acc_unlck:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+nack_acc:
+ hfi1_rc_error(qp, IB_WC_LOC_PROT_ERR);
+ qp->r_nak_state = IB_NAK_REMOTE_ACCESS_ERROR;
+ qp->r_ack_psn = qp->r_psn;
+send_ack:
+ hfi1_send_rc_ack(rcd, qp, is_fecn);
+}
+
+void hfi1_rc_hdrerr(
+ struct hfi1_ctxtdata *rcd,
+ struct hfi1_ib_header *hdr,
+ u32 rcv_flags,
+ struct hfi1_qp *qp)
+{
+ int has_grh = rcv_flags & HFI1_HAS_GRH;
+ struct hfi1_other_headers *ohdr;
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ int diff;
+ u8 opcode;
+ u32 psn;
+
+ /* Check for GRH */
+ ohdr = &hdr->u.oth;
+ if (has_grh)
+ ohdr = &hdr->u.l.oth;
+
+ opcode = be32_to_cpu(ohdr->bth[0]);
+ if (hfi1_ruc_check_hdr(ibp, hdr, has_grh, qp, opcode))
+ return;
+
+ psn = be32_to_cpu(ohdr->bth[2]);
+ opcode >>= 24;
+
+ /* Only deal with RDMA Writes for now */
+ if (opcode < IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST) {
+ diff = delta_psn(psn, qp->r_psn);
+ if (!qp->r_nak_state && diff >= 0) {
+ ibp->n_rc_seqnak++;
+ qp->r_nak_state = IB_NAK_PSN_ERROR;
+ /* Use the expected PSN. */
+ qp->r_ack_psn = qp->r_psn;
+ /*
+ * Wait to send the sequence
+ * NAK until all packets
+ * in the receive queue have
+ * been processed.
+ * Otherwise, we end up
+ * propagating congestion.
+ */
+ if (list_empty(&qp->rspwait)) {
+ qp->r_flags |= HFI1_R_RSP_NAK;
+ atomic_inc(&qp->refcount);
+ list_add_tail(
+ &qp->rspwait,
+ &rcd->qp_wait_list);
+ }
+ } /* Out of sequence NAK */
+ } /* QP Request NAKs */
+}
diff --git a/drivers/staging/rdma/hfi1/ruc.c b/drivers/staging/rdma/hfi1/ruc.c
new file mode 100644
index 0000000..a411528
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/ruc.c
@@ -0,0 +1,948 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/spinlock.h>
+
+#include "hfi.h"
+#include "mad.h"
+#include "qp.h"
+#include "sdma.h"
+
+/*
+ * Convert the AETH RNR timeout code into the number of microseconds.
+ */
+const u32 ib_hfi1_rnr_table[32] = {
+ 655360, /* 00: 655.36 */
+ 10, /* 01: .01 */
+ 20, /* 02 .02 */
+ 30, /* 03: .03 */
+ 40, /* 04: .04 */
+ 60, /* 05: .06 */
+ 80, /* 06: .08 */
+ 120, /* 07: .12 */
+ 160, /* 08: .16 */
+ 240, /* 09: .24 */
+ 320, /* 0A: .32 */
+ 480, /* 0B: .48 */
+ 640, /* 0C: .64 */
+ 960, /* 0D: .96 */
+ 1280, /* 0E: 1.28 */
+ 1920, /* 0F: 1.92 */
+ 2560, /* 10: 2.56 */
+ 3840, /* 11: 3.84 */
+ 5120, /* 12: 5.12 */
+ 7680, /* 13: 7.68 */
+ 10240, /* 14: 10.24 */
+ 15360, /* 15: 15.36 */
+ 20480, /* 16: 20.48 */
+ 30720, /* 17: 30.72 */
+ 40960, /* 18: 40.96 */
+ 61440, /* 19: 61.44 */
+ 81920, /* 1A: 81.92 */
+ 122880, /* 1B: 122.88 */
+ 163840, /* 1C: 163.84 */
+ 245760, /* 1D: 245.76 */
+ 327680, /* 1E: 327.68 */
+ 491520 /* 1F: 491.52 */
+};
+
+/*
+ * Validate a RWQE and fill in the SGE state.
+ * Return 1 if OK.
+ */
+static int init_sge(struct hfi1_qp *qp, struct hfi1_rwqe *wqe)
+{
+ int i, j, ret;
+ struct ib_wc wc;
+ struct hfi1_lkey_table *rkt;
+ struct hfi1_pd *pd;
+ struct hfi1_sge_state *ss;
+
+ rkt = &to_idev(qp->ibqp.device)->lk_table;
+ pd = to_ipd(qp->ibqp.srq ? qp->ibqp.srq->pd : qp->ibqp.pd);
+ ss = &qp->r_sge;
+ ss->sg_list = qp->r_sg_list;
+ qp->r_len = 0;
+ for (i = j = 0; i < wqe->num_sge; i++) {
+ if (wqe->sg_list[i].length == 0)
+ continue;
+ /* Check LKEY */
+ if (!hfi1_lkey_ok(rkt, pd, j ? &ss->sg_list[j - 1] : &ss->sge,
+ &wqe->sg_list[i], IB_ACCESS_LOCAL_WRITE))
+ goto bad_lkey;
+ qp->r_len += wqe->sg_list[i].length;
+ j++;
+ }
+ ss->num_sge = j;
+ ss->total_len = qp->r_len;
+ ret = 1;
+ goto bail;
+
+bad_lkey:
+ while (j) {
+ struct hfi1_sge *sge = --j ? &ss->sg_list[j - 1] : &ss->sge;
+
+ hfi1_put_mr(sge->mr);
+ }
+ ss->num_sge = 0;
+ memset(&wc, 0, sizeof(wc));
+ wc.wr_id = wqe->wr_id;
+ wc.status = IB_WC_LOC_PROT_ERR;
+ wc.opcode = IB_WC_RECV;
+ wc.qp = &qp->ibqp;
+ /* Signal solicited completion event. */
+ hfi1_cq_enter(to_icq(qp->ibqp.recv_cq), &wc, 1);
+ ret = 0;
+bail:
+ return ret;
+}
+
+/**
+ * hfi1_get_rwqe - copy the next RWQE into the QP's RWQE
+ * @qp: the QP
+ * @wr_id_only: update qp->r_wr_id only, not qp->r_sge
+ *
+ * Return -1 if there is a local error, 0 if no RWQE is available,
+ * otherwise return 1.
+ *
+ * Can be called from interrupt level.
+ */
+int hfi1_get_rwqe(struct hfi1_qp *qp, int wr_id_only)
+{
+ unsigned long flags;
+ struct hfi1_rq *rq;
+ struct hfi1_rwq *wq;
+ struct hfi1_srq *srq;
+ struct hfi1_rwqe *wqe;
+ void (*handler)(struct ib_event *, void *);
+ u32 tail;
+ int ret;
+
+ if (qp->ibqp.srq) {
+ srq = to_isrq(qp->ibqp.srq);
+ handler = srq->ibsrq.event_handler;
+ rq = &srq->rq;
+ } else {
+ srq = NULL;
+ handler = NULL;
+ rq = &qp->r_rq;
+ }
+
+ spin_lock_irqsave(&rq->lock, flags);
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK)) {
+ ret = 0;
+ goto unlock;
+ }
+
+ wq = rq->wq;
+ tail = wq->tail;
+ /* Validate tail before using it since it is user writable. */
+ if (tail >= rq->size)
+ tail = 0;
+ if (unlikely(tail == wq->head)) {
+ ret = 0;
+ goto unlock;
+ }
+ /* Make sure entry is read after head index is read. */
+ smp_rmb();
+ wqe = get_rwqe_ptr(rq, tail);
+ /*
+ * Even though we update the tail index in memory, the verbs
+ * consumer is not supposed to post more entries until a
+ * completion is generated.
+ */
+ if (++tail >= rq->size)
+ tail = 0;
+ wq->tail = tail;
+ if (!wr_id_only && !init_sge(qp, wqe)) {
+ ret = -1;
+ goto unlock;
+ }
+ qp->r_wr_id = wqe->wr_id;
+
+ ret = 1;
+ set_bit(HFI1_R_WRID_VALID, &qp->r_aflags);
+ if (handler) {
+ u32 n;
+
+ /*
+ * Validate head pointer value and compute
+ * the number of remaining WQEs.
+ */
+ n = wq->head;
+ if (n >= rq->size)
+ n = 0;
+ if (n < tail)
+ n += rq->size - tail;
+ else
+ n -= tail;
+ if (n < srq->limit) {
+ struct ib_event ev;
+
+ srq->limit = 0;
+ spin_unlock_irqrestore(&rq->lock, flags);
+ ev.device = qp->ibqp.device;
+ ev.element.srq = qp->ibqp.srq;
+ ev.event = IB_EVENT_SRQ_LIMIT_REACHED;
+ handler(&ev, srq->ibsrq.srq_context);
+ goto bail;
+ }
+ }
+unlock:
+ spin_unlock_irqrestore(&rq->lock, flags);
+bail:
+ return ret;
+}
+
+/*
+ * Switch to alternate path.
+ * The QP s_lock should be held and interrupts disabled.
+ */
+void hfi1_migrate_qp(struct hfi1_qp *qp)
+{
+ struct ib_event ev;
+
+ qp->s_mig_state = IB_MIG_MIGRATED;
+ qp->remote_ah_attr = qp->alt_ah_attr;
+ qp->port_num = qp->alt_ah_attr.port_num;
+ qp->s_pkey_index = qp->s_alt_pkey_index;
+ qp->s_flags |= HFI1_S_AHG_CLEAR;
+
+ ev.device = qp->ibqp.device;
+ ev.element.qp = &qp->ibqp;
+ ev.event = IB_EVENT_PATH_MIG;
+ qp->ibqp.event_handler(&ev, qp->ibqp.qp_context);
+}
+
+static __be64 get_sguid(struct hfi1_ibport *ibp, unsigned index)
+{
+ if (!index) {
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+
+ return cpu_to_be64(ppd->guid);
+ }
+ return ibp->guids[index - 1];
+}
+
+static int gid_ok(union ib_gid *gid, __be64 gid_prefix, __be64 id)
+{
+ return (gid->global.interface_id == id &&
+ (gid->global.subnet_prefix == gid_prefix ||
+ gid->global.subnet_prefix == IB_DEFAULT_GID_PREFIX));
+}
+
+/*
+ *
+ * This should be called with the QP r_lock held.
+ *
+ * The s_lock will be acquired around the hfi1_migrate_qp() call.
+ */
+int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_ib_header *hdr,
+ int has_grh, struct hfi1_qp *qp, u32 bth0)
+{
+ __be64 guid;
+ unsigned long flags;
+ u8 sc5 = ibp->sl_to_sc[qp->remote_ah_attr.sl];
+
+ if (qp->s_mig_state == IB_MIG_ARMED && (bth0 & IB_BTH_MIG_REQ)) {
+ if (!has_grh) {
+ if (qp->alt_ah_attr.ah_flags & IB_AH_GRH)
+ goto err;
+ } else {
+ if (!(qp->alt_ah_attr.ah_flags & IB_AH_GRH))
+ goto err;
+ guid = get_sguid(ibp, qp->alt_ah_attr.grh.sgid_index);
+ if (!gid_ok(&hdr->u.l.grh.dgid, ibp->gid_prefix, guid))
+ goto err;
+ if (!gid_ok(&hdr->u.l.grh.sgid,
+ qp->alt_ah_attr.grh.dgid.global.subnet_prefix,
+ qp->alt_ah_attr.grh.dgid.global.interface_id))
+ goto err;
+ }
+ if (unlikely(rcv_pkey_check(ppd_from_ibp(ibp), (u16)bth0,
+ sc5, be16_to_cpu(hdr->lrh[3])))) {
+ hfi1_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_PKEY,
+ (u16)bth0,
+ (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF,
+ 0, qp->ibqp.qp_num,
+ hdr->lrh[3], hdr->lrh[1]);
+ goto err;
+ }
+ /* Validate the SLID. See Ch. 9.6.1.5 and 17.2.8 */
+ if (be16_to_cpu(hdr->lrh[3]) != qp->alt_ah_attr.dlid ||
+ ppd_from_ibp(ibp)->port != qp->alt_ah_attr.port_num)
+ goto err;
+ spin_lock_irqsave(&qp->s_lock, flags);
+ hfi1_migrate_qp(qp);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ } else {
+ if (!has_grh) {
+ if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
+ goto err;
+ } else {
+ if (!(qp->remote_ah_attr.ah_flags & IB_AH_GRH))
+ goto err;
+ guid = get_sguid(ibp,
+ qp->remote_ah_attr.grh.sgid_index);
+ if (!gid_ok(&hdr->u.l.grh.dgid, ibp->gid_prefix, guid))
+ goto err;
+ if (!gid_ok(&hdr->u.l.grh.sgid,
+ qp->remote_ah_attr.grh.dgid.global.subnet_prefix,
+ qp->remote_ah_attr.grh.dgid.global.interface_id))
+ goto err;
+ }
+ if (unlikely(rcv_pkey_check(ppd_from_ibp(ibp), (u16)bth0,
+ sc5, be16_to_cpu(hdr->lrh[3])))) {
+ hfi1_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_PKEY,
+ (u16)bth0,
+ (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF,
+ 0, qp->ibqp.qp_num,
+ hdr->lrh[3], hdr->lrh[1]);
+ goto err;
+ }
+ /* Validate the SLID. See Ch. 9.6.1.5 */
+ if (be16_to_cpu(hdr->lrh[3]) != qp->remote_ah_attr.dlid ||
+ ppd_from_ibp(ibp)->port != qp->port_num)
+ goto err;
+ if (qp->s_mig_state == IB_MIG_REARM &&
+ !(bth0 & IB_BTH_MIG_REQ))
+ qp->s_mig_state = IB_MIG_ARMED;
+ }
+
+ return 0;
+
+err:
+ return 1;
+}
+
+/**
+ * ruc_loopback - handle UC and RC loopback requests
+ * @sqp: the sending QP
+ *
+ * This is called from hfi1_do_send() to
+ * forward a WQE addressed to the same HFI.
+ * Note that although we are single threaded due to the tasklet, we still
+ * have to protect against post_send(). We don't have to worry about
+ * receive interrupts since this is a connected protocol and all packets
+ * will pass through here.
+ */
+static void ruc_loopback(struct hfi1_qp *sqp)
+{
+ struct hfi1_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num);
+ struct hfi1_qp *qp;
+ struct hfi1_swqe *wqe;
+ struct hfi1_sge *sge;
+ unsigned long flags;
+ struct ib_wc wc;
+ u64 sdata;
+ atomic64_t *maddr;
+ enum ib_wc_status send_status;
+ int release;
+ int ret;
+
+ rcu_read_lock();
+
+ /*
+ * Note that we check the responder QP state after
+ * checking the requester's state.
+ */
+ qp = hfi1_lookup_qpn(ibp, sqp->remote_qpn);
+
+ spin_lock_irqsave(&sqp->s_lock, flags);
+
+ /* Return if we are already busy processing a work request. */
+ if ((sqp->s_flags & (HFI1_S_BUSY | HFI1_S_ANY_WAIT)) ||
+ !(ib_hfi1_state_ops[sqp->state] & HFI1_PROCESS_OR_FLUSH_SEND))
+ goto unlock;
+
+ sqp->s_flags |= HFI1_S_BUSY;
+
+again:
+ if (sqp->s_last == sqp->s_head)
+ goto clr_busy;
+ wqe = get_swqe_ptr(sqp, sqp->s_last);
+
+ /* Return if it is not OK to start a new work request. */
+ if (!(ib_hfi1_state_ops[sqp->state] & HFI1_PROCESS_NEXT_SEND_OK)) {
+ if (!(ib_hfi1_state_ops[sqp->state] & HFI1_FLUSH_SEND))
+ goto clr_busy;
+ /* We are in the error state, flush the work request. */
+ send_status = IB_WC_WR_FLUSH_ERR;
+ goto flush_send;
+ }
+
+ /*
+ * We can rely on the entry not changing without the s_lock
+ * being held until we update s_last.
+ * We increment s_cur to indicate s_last is in progress.
+ */
+ if (sqp->s_last == sqp->s_cur) {
+ if (++sqp->s_cur >= sqp->s_size)
+ sqp->s_cur = 0;
+ }
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+
+ if (!qp || !(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK) ||
+ qp->ibqp.qp_type != sqp->ibqp.qp_type) {
+ ibp->n_pkt_drops++;
+ /*
+ * For RC, the requester would timeout and retry so
+ * shortcut the timeouts and just signal too many retries.
+ */
+ if (sqp->ibqp.qp_type == IB_QPT_RC)
+ send_status = IB_WC_RETRY_EXC_ERR;
+ else
+ send_status = IB_WC_SUCCESS;
+ goto serr;
+ }
+
+ memset(&wc, 0, sizeof(wc));
+ send_status = IB_WC_SUCCESS;
+
+ release = 1;
+ sqp->s_sge.sge = wqe->sg_list[0];
+ sqp->s_sge.sg_list = wqe->sg_list + 1;
+ sqp->s_sge.num_sge = wqe->wr.num_sge;
+ sqp->s_len = wqe->length;
+ switch (wqe->wr.opcode) {
+ case IB_WR_SEND_WITH_IMM:
+ wc.wc_flags = IB_WC_WITH_IMM;
+ wc.ex.imm_data = wqe->wr.ex.imm_data;
+ /* FALLTHROUGH */
+ case IB_WR_SEND:
+ ret = hfi1_get_rwqe(qp, 0);
+ if (ret < 0)
+ goto op_err;
+ if (!ret)
+ goto rnr_nak;
+ break;
+
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_WRITE)))
+ goto inv_err;
+ wc.wc_flags = IB_WC_WITH_IMM;
+ wc.ex.imm_data = wqe->wr.ex.imm_data;
+ ret = hfi1_get_rwqe(qp, 1);
+ if (ret < 0)
+ goto op_err;
+ if (!ret)
+ goto rnr_nak;
+ /* FALLTHROUGH */
+ case IB_WR_RDMA_WRITE:
+ if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_WRITE)))
+ goto inv_err;
+ if (wqe->length == 0)
+ break;
+ if (unlikely(!hfi1_rkey_ok(qp, &qp->r_sge.sge, wqe->length,
+ wqe->wr.wr.rdma.remote_addr,
+ wqe->wr.wr.rdma.rkey,
+ IB_ACCESS_REMOTE_WRITE)))
+ goto acc_err;
+ qp->r_sge.sg_list = NULL;
+ qp->r_sge.num_sge = 1;
+ qp->r_sge.total_len = wqe->length;
+ break;
+
+ case IB_WR_RDMA_READ:
+ if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_READ)))
+ goto inv_err;
+ if (unlikely(!hfi1_rkey_ok(qp, &sqp->s_sge.sge, wqe->length,
+ wqe->wr.wr.rdma.remote_addr,
+ wqe->wr.wr.rdma.rkey,
+ IB_ACCESS_REMOTE_READ)))
+ goto acc_err;
+ release = 0;
+ sqp->s_sge.sg_list = NULL;
+ sqp->s_sge.num_sge = 1;
+ qp->r_sge.sge = wqe->sg_list[0];
+ qp->r_sge.sg_list = wqe->sg_list + 1;
+ qp->r_sge.num_sge = wqe->wr.num_sge;
+ qp->r_sge.total_len = wqe->length;
+ break;
+
+ case IB_WR_ATOMIC_CMP_AND_SWP:
+ case IB_WR_ATOMIC_FETCH_AND_ADD:
+ if (unlikely(!(qp->qp_access_flags & IB_ACCESS_REMOTE_ATOMIC)))
+ goto inv_err;
+ if (unlikely(!hfi1_rkey_ok(qp, &qp->r_sge.sge, sizeof(u64),
+ wqe->wr.wr.atomic.remote_addr,
+ wqe->wr.wr.atomic.rkey,
+ IB_ACCESS_REMOTE_ATOMIC)))
+ goto acc_err;
+ /* Perform atomic OP and save result. */
+ maddr = (atomic64_t *) qp->r_sge.sge.vaddr;
+ sdata = wqe->wr.wr.atomic.compare_add;
+ *(u64 *) sqp->s_sge.sge.vaddr =
+ (wqe->wr.opcode == IB_WR_ATOMIC_FETCH_AND_ADD) ?
+ (u64) atomic64_add_return(sdata, maddr) - sdata :
+ (u64) cmpxchg((u64 *) qp->r_sge.sge.vaddr,
+ sdata, wqe->wr.wr.atomic.swap);
+ hfi1_put_mr(qp->r_sge.sge.mr);
+ qp->r_sge.num_sge = 0;
+ goto send_comp;
+
+ default:
+ send_status = IB_WC_LOC_QP_OP_ERR;
+ goto serr;
+ }
+
+ sge = &sqp->s_sge.sge;
+ while (sqp->s_len) {
+ u32 len = sqp->s_len;
+
+ if (len > sge->length)
+ len = sge->length;
+ if (len > sge->sge_length)
+ len = sge->sge_length;
+ WARN_ON_ONCE(len == 0);
+ hfi1_copy_sge(&qp->r_sge, sge->vaddr, len, release);
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (!release)
+ hfi1_put_mr(sge->mr);
+ if (--sqp->s_sge.num_sge)
+ *sge = *sqp->s_sge.sg_list++;
+ } else if (sge->length == 0 && sge->mr->lkey) {
+ if (++sge->n >= HFI1_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ sqp->s_len -= len;
+ }
+ if (release)
+ hfi1_put_ss(&qp->r_sge);
+
+ if (!test_and_clear_bit(HFI1_R_WRID_VALID, &qp->r_aflags))
+ goto send_comp;
+
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE_WITH_IMM)
+ wc.opcode = IB_WC_RECV_RDMA_WITH_IMM;
+ else
+ wc.opcode = IB_WC_RECV;
+ wc.wr_id = qp->r_wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.byte_len = wqe->length;
+ wc.qp = &qp->ibqp;
+ wc.src_qp = qp->remote_qpn;
+ wc.slid = qp->remote_ah_attr.dlid;
+ wc.sl = qp->remote_ah_attr.sl;
+ wc.port_num = 1;
+ /* Signal completion event if the solicited bit is set. */
+ hfi1_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
+ wqe->wr.send_flags & IB_SEND_SOLICITED);
+
+send_comp:
+ spin_lock_irqsave(&sqp->s_lock, flags);
+ ibp->n_loop_pkts++;
+flush_send:
+ sqp->s_rnr_retry = sqp->s_rnr_retry_cnt;
+ hfi1_send_complete(sqp, wqe, send_status);
+ goto again;
+
+rnr_nak:
+ /* Handle RNR NAK */
+ if (qp->ibqp.qp_type == IB_QPT_UC)
+ goto send_comp;
+ ibp->n_rnr_naks++;
+ /*
+ * Note: we don't need the s_lock held since the BUSY flag
+ * makes this single threaded.
+ */
+ if (sqp->s_rnr_retry == 0) {
+ send_status = IB_WC_RNR_RETRY_EXC_ERR;
+ goto serr;
+ }
+ if (sqp->s_rnr_retry_cnt < 7)
+ sqp->s_rnr_retry--;
+ spin_lock_irqsave(&sqp->s_lock, flags);
+ if (!(ib_hfi1_state_ops[sqp->state] & HFI1_PROCESS_RECV_OK))
+ goto clr_busy;
+ sqp->s_flags |= HFI1_S_WAIT_RNR;
+ sqp->s_timer.function = hfi1_rc_rnr_retry;
+ sqp->s_timer.expires = jiffies +
+ usecs_to_jiffies(ib_hfi1_rnr_table[qp->r_min_rnr_timer]);
+ add_timer(&sqp->s_timer);
+ goto clr_busy;
+
+op_err:
+ send_status = IB_WC_REM_OP_ERR;
+ wc.status = IB_WC_LOC_QP_OP_ERR;
+ goto err;
+
+inv_err:
+ send_status = IB_WC_REM_INV_REQ_ERR;
+ wc.status = IB_WC_LOC_QP_OP_ERR;
+ goto err;
+
+acc_err:
+ send_status = IB_WC_REM_ACCESS_ERR;
+ wc.status = IB_WC_LOC_PROT_ERR;
+err:
+ /* responder goes to error state */
+ hfi1_rc_error(qp, wc.status);
+
+serr:
+ spin_lock_irqsave(&sqp->s_lock, flags);
+ hfi1_send_complete(sqp, wqe, send_status);
+ if (sqp->ibqp.qp_type == IB_QPT_RC) {
+ int lastwqe = hfi1_error_qp(sqp, IB_WC_WR_FLUSH_ERR);
+
+ sqp->s_flags &= ~HFI1_S_BUSY;
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+ if (lastwqe) {
+ struct ib_event ev;
+
+ ev.device = sqp->ibqp.device;
+ ev.element.qp = &sqp->ibqp;
+ ev.event = IB_EVENT_QP_LAST_WQE_REACHED;
+ sqp->ibqp.event_handler(&ev, sqp->ibqp.qp_context);
+ }
+ goto done;
+ }
+clr_busy:
+ sqp->s_flags &= ~HFI1_S_BUSY;
+unlock:
+ spin_unlock_irqrestore(&sqp->s_lock, flags);
+done:
+ rcu_read_unlock();
+}
+
+/**
+ * hfi1_make_grh - construct a GRH header
+ * @ibp: a pointer to the IB port
+ * @hdr: a pointer to the GRH header being constructed
+ * @grh: the global route address to send to
+ * @hwords: the number of 32 bit words of header being sent
+ * @nwords: the number of 32 bit words of data being sent
+ *
+ * Return the size of the header in 32 bit words.
+ */
+u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
+ struct ib_global_route *grh, u32 hwords, u32 nwords)
+{
+ hdr->version_tclass_flow =
+ cpu_to_be32((IB_GRH_VERSION << IB_GRH_VERSION_SHIFT) |
+ (grh->traffic_class << IB_GRH_TCLASS_SHIFT) |
+ (grh->flow_label << IB_GRH_FLOW_SHIFT));
+ hdr->paylen = cpu_to_be16((hwords - 2 + nwords + SIZE_OF_CRC) << 2);
+ /* next_hdr is defined by C8-7 in ch. 8.4.1 */
+ hdr->next_hdr = IB_GRH_NEXT_HDR;
+ hdr->hop_limit = grh->hop_limit;
+ /* The SGID is 32-bit aligned. */
+ hdr->sgid.global.subnet_prefix = ibp->gid_prefix;
+ hdr->sgid.global.interface_id =
+ grh->sgid_index && grh->sgid_index < ARRAY_SIZE(ibp->guids) ?
+ ibp->guids[grh->sgid_index - 1] :
+ cpu_to_be64(ppd_from_ibp(ibp)->guid);
+ hdr->dgid = grh->dgid;
+
+ /* GRH header size in 32-bit words. */
+ return sizeof(struct ib_grh) / sizeof(u32);
+}
+
+/*
+ * free_ahg - clear ahg from QP
+ */
+void clear_ahg(struct hfi1_qp *qp)
+{
+ qp->s_hdr->ahgcount = 0;
+ qp->s_flags &= ~(HFI1_S_AHG_VALID | HFI1_S_AHG_CLEAR);
+ if (qp->s_sde)
+ sdma_ahg_free(qp->s_sde, qp->s_ahgidx);
+ qp->s_ahgidx = -1;
+ qp->s_sde = NULL;
+}
+
+#define BTH2_OFFSET (offsetof(struct hfi1_pio_header, hdr.u.oth.bth[2]) / 4)
+
+/**
+ * build_ahg - create ahg in s_hdr
+ * @qp: a pointer to QP
+ * @npsn: the next PSN for the request/response
+ *
+ * This routine handles the AHG by allocating an ahg entry and causing the
+ * copy of the first middle.
+ *
+ * Subsequent middles use the copied entry, editing the
+ * PSN with 1 or 2 edits.
+ */
+static inline void build_ahg(struct hfi1_qp *qp, u32 npsn)
+{
+ if (unlikely(qp->s_flags & HFI1_S_AHG_CLEAR))
+ clear_ahg(qp);
+ if (!(qp->s_flags & HFI1_S_AHG_VALID)) {
+ /* first middle that needs copy */
+ if (qp->s_ahgidx < 0) {
+ if (!qp->s_sde)
+ qp->s_sde = qp_to_sdma_engine(qp, qp->s_sc);
+ qp->s_ahgidx = sdma_ahg_alloc(qp->s_sde);
+ }
+ if (qp->s_ahgidx >= 0) {
+ qp->s_ahgpsn = npsn;
+ qp->s_hdr->tx_flags |= SDMA_TXREQ_F_AHG_COPY;
+ /* save to protect a change in another thread */
+ qp->s_hdr->sde = qp->s_sde;
+ qp->s_hdr->ahgidx = qp->s_ahgidx;
+ qp->s_flags |= HFI1_S_AHG_VALID;
+ }
+ } else {
+ /* subsequent middle after valid */
+ if (qp->s_ahgidx >= 0) {
+ qp->s_hdr->tx_flags |= SDMA_TXREQ_F_USE_AHG;
+ qp->s_hdr->ahgidx = qp->s_ahgidx;
+ qp->s_hdr->ahgcount++;
+ qp->s_hdr->ahgdesc[0] =
+ sdma_build_ahg_descriptor(
+ (__force u16)cpu_to_be16((u16)npsn),
+ BTH2_OFFSET,
+ 16,
+ 16);
+ if ((npsn & 0xffff0000) !=
+ (qp->s_ahgpsn & 0xffff0000)) {
+ qp->s_hdr->ahgcount++;
+ qp->s_hdr->ahgdesc[1] =
+ sdma_build_ahg_descriptor(
+ (__force u16)cpu_to_be16(
+ (u16)(npsn >> 16)),
+ BTH2_OFFSET,
+ 0,
+ 16);
+ }
+ }
+ }
+}
+
+void hfi1_make_ruc_header(struct hfi1_qp *qp, struct hfi1_other_headers *ohdr,
+ u32 bth0, u32 bth2, int middle)
+{
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ u16 lrh0;
+ u32 nwords;
+ u32 extra_bytes;
+ u8 sc5;
+ u32 bth1;
+
+ /* Construct the header. */
+ extra_bytes = -qp->s_cur_size & 3;
+ nwords = (qp->s_cur_size + extra_bytes) >> 2;
+ lrh0 = HFI1_LRH_BTH;
+ if (unlikely(qp->remote_ah_attr.ah_flags & IB_AH_GRH)) {
+ qp->s_hdrwords += hfi1_make_grh(ibp, &qp->s_hdr->ibh.u.l.grh,
+ &qp->remote_ah_attr.grh,
+ qp->s_hdrwords, nwords);
+ lrh0 = HFI1_LRH_GRH;
+ middle = 0;
+ }
+ sc5 = ibp->sl_to_sc[qp->remote_ah_attr.sl];
+ lrh0 |= (sc5 & 0xf) << 12 | (qp->remote_ah_attr.sl & 0xf) << 4;
+ qp->s_sc = sc5;
+ /*
+ * reset s_hdr/AHG fields
+ *
+ * This insures that the ahgentry/ahgcount
+ * are at a non-AHG default to protect
+ * build_verbs_tx_desc() from using
+ * an include ahgidx.
+ *
+ * build_ahg() will modify as appropriate
+ * to use the AHG feature.
+ */
+ qp->s_hdr->tx_flags = 0;
+ qp->s_hdr->ahgcount = 0;
+ qp->s_hdr->ahgidx = 0;
+ qp->s_hdr->sde = NULL;
+ if (qp->s_mig_state == IB_MIG_MIGRATED)
+ bth0 |= IB_BTH_MIG_REQ;
+ else
+ middle = 0;
+ if (middle)
+ build_ahg(qp, bth2);
+ else
+ qp->s_flags &= ~HFI1_S_AHG_VALID;
+ qp->s_hdr->ibh.lrh[0] = cpu_to_be16(lrh0);
+ qp->s_hdr->ibh.lrh[1] = cpu_to_be16(qp->remote_ah_attr.dlid);
+ qp->s_hdr->ibh.lrh[2] =
+ cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC);
+ qp->s_hdr->ibh.lrh[3] = cpu_to_be16(ppd_from_ibp(ibp)->lid |
+ qp->remote_ah_attr.src_path_bits);
+ bth0 |= hfi1_get_pkey(ibp, qp->s_pkey_index);
+ bth0 |= extra_bytes << 20;
+ ohdr->bth[0] = cpu_to_be32(bth0);
+ bth1 = qp->remote_qpn;
+ if (qp->s_flags & HFI1_S_ECN) {
+ qp->s_flags &= ~HFI1_S_ECN;
+ /* we recently received a FECN, so return a BECN */
+ bth1 |= (HFI1_BECN_MASK << HFI1_BECN_SHIFT);
+ }
+ ohdr->bth[1] = cpu_to_be32(bth1);
+ ohdr->bth[2] = cpu_to_be32(bth2);
+}
+
+/**
+ * hfi1_do_send - perform a send on a QP
+ * @work: contains a pointer to the QP
+ *
+ * Process entries in the send work queue until credit or queue is
+ * exhausted. Only allow one CPU to send a packet per QP (tasklet).
+ * Otherwise, two threads could send packets out of order.
+ */
+void hfi1_do_send(struct work_struct *work)
+{
+ struct iowait *wait = container_of(work, struct iowait, iowork);
+ struct hfi1_qp *qp = container_of(wait, struct hfi1_qp, s_iowait);
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ int (*make_req)(struct hfi1_qp *qp);
+ unsigned long flags;
+
+ if ((qp->ibqp.qp_type == IB_QPT_RC ||
+ qp->ibqp.qp_type == IB_QPT_UC) &&
+ !loopback &&
+ (qp->remote_ah_attr.dlid & ~((1 << ppd->lmc) - 1)) == ppd->lid) {
+ ruc_loopback(qp);
+ return;
+ }
+
+ if (qp->ibqp.qp_type == IB_QPT_RC)
+ make_req = hfi1_make_rc_req;
+ else if (qp->ibqp.qp_type == IB_QPT_UC)
+ make_req = hfi1_make_uc_req;
+ else
+ make_req = hfi1_make_ud_req;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ /* Return if we are already busy processing a work request. */
+ if (!hfi1_send_ok(qp)) {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return;
+ }
+
+ qp->s_flags |= HFI1_S_BUSY;
+
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+
+ do {
+ /* Check for a constructed packet to be sent. */
+ if (qp->s_hdrwords != 0) {
+ /*
+ * If the packet cannot be sent now, return and
+ * the send tasklet will be woken up later.
+ */
+ if (hfi1_verbs_send(qp, qp->s_hdr, qp->s_hdrwords,
+ qp->s_cur_sge, qp->s_cur_size))
+ break;
+ /* Record that s_hdr is empty. */
+ qp->s_hdrwords = 0;
+ }
+ } while (make_req(qp));
+}
+
+/*
+ * This should be called with s_lock held.
+ */
+void hfi1_send_complete(struct hfi1_qp *qp, struct hfi1_swqe *wqe,
+ enum ib_wc_status status)
+{
+ u32 old_last, last;
+ unsigned i;
+
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_OR_FLUSH_SEND))
+ return;
+
+ for (i = 0; i < wqe->wr.num_sge; i++) {
+ struct hfi1_sge *sge = &wqe->sg_list[i];
+
+ hfi1_put_mr(sge->mr);
+ }
+ if (qp->ibqp.qp_type == IB_QPT_UD ||
+ qp->ibqp.qp_type == IB_QPT_SMI ||
+ qp->ibqp.qp_type == IB_QPT_GSI)
+ atomic_dec(&to_iah(wqe->wr.wr.ud.ah)->refcount);
+
+ /* See ch. 11.2.4.1 and 10.7.3.1 */
+ if (!(qp->s_flags & HFI1_S_SIGNAL_REQ_WR) ||
+ (wqe->wr.send_flags & IB_SEND_SIGNALED) ||
+ status != IB_WC_SUCCESS) {
+ struct ib_wc wc;
+
+ memset(&wc, 0, sizeof(wc));
+ wc.wr_id = wqe->wr.wr_id;
+ wc.status = status;
+ wc.opcode = ib_hfi1_wc_opcode[wqe->wr.opcode];
+ wc.qp = &qp->ibqp;
+ if (status == IB_WC_SUCCESS)
+ wc.byte_len = wqe->length;
+ hfi1_cq_enter(to_icq(qp->ibqp.send_cq), &wc,
+ status != IB_WC_SUCCESS);
+ }
+
+ last = qp->s_last;
+ old_last = last;
+ if (++last >= qp->s_size)
+ last = 0;
+ qp->s_last = last;
+ if (qp->s_acked == old_last)
+ qp->s_acked = last;
+ if (qp->s_cur == old_last)
+ qp->s_cur = last;
+ if (qp->s_tail == old_last)
+ qp->s_tail = last;
+ if (qp->state == IB_QPS_SQD && last == qp->s_cur)
+ qp->s_draining = 0;
+}
diff --git a/drivers/staging/rdma/hfi1/sdma.c b/drivers/staging/rdma/hfi1/sdma.c
new file mode 100644
index 0000000..37bd767
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/sdma.c
@@ -0,0 +1,2962 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/spinlock.h>
+#include <linux/seqlock.h>
+#include <linux/netdevice.h>
+#include <linux/moduleparam.h>
+#include <linux/bitops.h>
+#include <linux/timer.h>
+#include <linux/vmalloc.h>
+
+#include "hfi.h"
+#include "common.h"
+#include "qp.h"
+#include "sdma.h"
+#include "iowait.h"
+#include "trace.h"
+
+/* must be a power of 2 >= 64 <= 32768 */
+#define SDMA_DESCQ_CNT 1024
+#define INVALID_TAIL 0xffff
+
+static uint sdma_descq_cnt = SDMA_DESCQ_CNT;
+module_param(sdma_descq_cnt, uint, S_IRUGO);
+MODULE_PARM_DESC(sdma_descq_cnt, "Number of SDMA descq entries");
+
+static uint sdma_idle_cnt = 250;
+module_param(sdma_idle_cnt, uint, S_IRUGO);
+MODULE_PARM_DESC(sdma_idle_cnt, "sdma interrupt idle delay (ns,default 250)");
+
+uint mod_num_sdma;
+module_param_named(num_sdma, mod_num_sdma, uint, S_IRUGO);
+MODULE_PARM_DESC(num_sdma, "Set max number SDMA engines to use");
+
+#define SDMA_WAIT_BATCH_SIZE 20
+/* max wait time for a SDMA engine to indicate it has halted */
+#define SDMA_ERR_HALT_TIMEOUT 10 /* ms */
+/* all SDMA engine errors that cause a halt */
+
+#define SD(name) SEND_DMA_##name
+#define ALL_SDMA_ENG_HALT_ERRS \
+ (SD(ENG_ERR_STATUS_SDMA_WRONG_DW_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_GEN_MISMATCH_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_TOO_LONG_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_TAIL_OUT_OF_BOUNDS_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_FIRST_DESC_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_MEM_READ_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_HALT_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_LENGTH_MISMATCH_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_PACKET_DESC_OVERFLOW_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_HEADER_SELECT_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_HEADER_ADDRESS_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_HEADER_LENGTH_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_TIMEOUT_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_DESC_TABLE_UNC_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_ASSEMBLY_UNC_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_PACKET_TRACKING_UNC_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_HEADER_STORAGE_UNC_ERR_SMASK) \
+ | SD(ENG_ERR_STATUS_SDMA_HEADER_REQUEST_FIFO_UNC_ERR_SMASK))
+
+/* sdma_sendctrl operations */
+#define SDMA_SENDCTRL_OP_ENABLE (1U << 0)
+#define SDMA_SENDCTRL_OP_INTENABLE (1U << 1)
+#define SDMA_SENDCTRL_OP_HALT (1U << 2)
+#define SDMA_SENDCTRL_OP_CLEANUP (1U << 3)
+
+/* handle long defines */
+#define SDMA_EGRESS_PACKET_OCCUPANCY_SMASK \
+SEND_EGRESS_SEND_DMA_STATUS_SDMA_EGRESS_PACKET_OCCUPANCY_SMASK
+#define SDMA_EGRESS_PACKET_OCCUPANCY_SHIFT \
+SEND_EGRESS_SEND_DMA_STATUS_SDMA_EGRESS_PACKET_OCCUPANCY_SHIFT
+
+static const char * const sdma_state_names[] = {
+ [sdma_state_s00_hw_down] = "s00_HwDown",
+ [sdma_state_s10_hw_start_up_halt_wait] = "s10_HwStartUpHaltWait",
+ [sdma_state_s15_hw_start_up_clean_wait] = "s15_HwStartUpCleanWait",
+ [sdma_state_s20_idle] = "s20_Idle",
+ [sdma_state_s30_sw_clean_up_wait] = "s30_SwCleanUpWait",
+ [sdma_state_s40_hw_clean_up_wait] = "s40_HwCleanUpWait",
+ [sdma_state_s50_hw_halt_wait] = "s50_HwHaltWait",
+ [sdma_state_s60_idle_halt_wait] = "s60_IdleHaltWait",
+ [sdma_state_s80_hw_freeze] = "s80_HwFreeze",
+ [sdma_state_s82_freeze_sw_clean] = "s82_FreezeSwClean",
+ [sdma_state_s99_running] = "s99_Running",
+};
+
+static const char * const sdma_event_names[] = {
+ [sdma_event_e00_go_hw_down] = "e00_GoHwDown",
+ [sdma_event_e10_go_hw_start] = "e10_GoHwStart",
+ [sdma_event_e15_hw_halt_done] = "e15_HwHaltDone",
+ [sdma_event_e25_hw_clean_up_done] = "e25_HwCleanUpDone",
+ [sdma_event_e30_go_running] = "e30_GoRunning",
+ [sdma_event_e40_sw_cleaned] = "e40_SwCleaned",
+ [sdma_event_e50_hw_cleaned] = "e50_HwCleaned",
+ [sdma_event_e60_hw_halted] = "e60_HwHalted",
+ [sdma_event_e70_go_idle] = "e70_GoIdle",
+ [sdma_event_e80_hw_freeze] = "e80_HwFreeze",
+ [sdma_event_e81_hw_frozen] = "e81_HwFrozen",
+ [sdma_event_e82_hw_unfreeze] = "e82_HwUnfreeze",
+ [sdma_event_e85_link_down] = "e85_LinkDown",
+ [sdma_event_e90_sw_halted] = "e90_SwHalted",
+};
+
+static const struct sdma_set_state_action sdma_action_table[] = {
+ [sdma_state_s00_hw_down] = {
+ .go_s99_running_tofalse = 1,
+ .op_enable = 0,
+ .op_intenable = 0,
+ .op_halt = 0,
+ .op_cleanup = 0,
+ },
+ [sdma_state_s10_hw_start_up_halt_wait] = {
+ .op_enable = 0,
+ .op_intenable = 0,
+ .op_halt = 1,
+ .op_cleanup = 0,
+ },
+ [sdma_state_s15_hw_start_up_clean_wait] = {
+ .op_enable = 0,
+ .op_intenable = 1,
+ .op_halt = 0,
+ .op_cleanup = 1,
+ },
+ [sdma_state_s20_idle] = {
+ .op_enable = 0,
+ .op_intenable = 1,
+ .op_halt = 0,
+ .op_cleanup = 0,
+ },
+ [sdma_state_s30_sw_clean_up_wait] = {
+ .op_enable = 0,
+ .op_intenable = 0,
+ .op_halt = 0,
+ .op_cleanup = 0,
+ },
+ [sdma_state_s40_hw_clean_up_wait] = {
+ .op_enable = 0,
+ .op_intenable = 0,
+ .op_halt = 0,
+ .op_cleanup = 1,
+ },
+ [sdma_state_s50_hw_halt_wait] = {
+ .op_enable = 0,
+ .op_intenable = 0,
+ .op_halt = 0,
+ .op_cleanup = 0,
+ },
+ [sdma_state_s60_idle_halt_wait] = {
+ .go_s99_running_tofalse = 1,
+ .op_enable = 0,
+ .op_intenable = 0,
+ .op_halt = 1,
+ .op_cleanup = 0,
+ },
+ [sdma_state_s80_hw_freeze] = {
+ .op_enable = 0,
+ .op_intenable = 0,
+ .op_halt = 0,
+ .op_cleanup = 0,
+ },
+ [sdma_state_s82_freeze_sw_clean] = {
+ .op_enable = 0,
+ .op_intenable = 0,
+ .op_halt = 0,
+ .op_cleanup = 0,
+ },
+ [sdma_state_s99_running] = {
+ .op_enable = 1,
+ .op_intenable = 1,
+ .op_halt = 0,
+ .op_cleanup = 0,
+ .go_s99_running_totrue = 1,
+ },
+};
+
+#define SDMA_TAIL_UPDATE_THRESH 0x1F
+
+/* declare all statics here rather than keep sorting */
+static void sdma_complete(struct kref *);
+static void sdma_finalput(struct sdma_state *);
+static void sdma_get(struct sdma_state *);
+static void sdma_hw_clean_up_task(unsigned long);
+static void sdma_put(struct sdma_state *);
+static void sdma_set_state(struct sdma_engine *, enum sdma_states);
+static void sdma_start_hw_clean_up(struct sdma_engine *);
+static void sdma_start_sw_clean_up(struct sdma_engine *);
+static void sdma_sw_clean_up_task(unsigned long);
+static void sdma_sendctrl(struct sdma_engine *, unsigned);
+static void init_sdma_regs(struct sdma_engine *, u32, uint);
+static void sdma_process_event(
+ struct sdma_engine *sde,
+ enum sdma_events event);
+static void __sdma_process_event(
+ struct sdma_engine *sde,
+ enum sdma_events event);
+static void dump_sdma_state(struct sdma_engine *sde);
+static void sdma_make_progress(struct sdma_engine *sde, u64 status);
+static void sdma_desc_avail(struct sdma_engine *sde, unsigned avail);
+static void sdma_flush_descq(struct sdma_engine *sde);
+
+/**
+ * sdma_state_name() - return state string from enum
+ * @state: state
+ */
+static const char *sdma_state_name(enum sdma_states state)
+{
+ return sdma_state_names[state];
+}
+
+static void sdma_get(struct sdma_state *ss)
+{
+ kref_get(&ss->kref);
+}
+
+static void sdma_complete(struct kref *kref)
+{
+ struct sdma_state *ss =
+ container_of(kref, struct sdma_state, kref);
+
+ complete(&ss->comp);
+}
+
+static void sdma_put(struct sdma_state *ss)
+{
+ kref_put(&ss->kref, sdma_complete);
+}
+
+static void sdma_finalput(struct sdma_state *ss)
+{
+ sdma_put(ss);
+ wait_for_completion(&ss->comp);
+}
+
+static inline void write_sde_csr(
+ struct sdma_engine *sde,
+ u32 offset0,
+ u64 value)
+{
+ write_kctxt_csr(sde->dd, sde->this_idx, offset0, value);
+}
+
+static inline u64 read_sde_csr(
+ struct sdma_engine *sde,
+ u32 offset0)
+{
+ return read_kctxt_csr(sde->dd, sde->this_idx, offset0);
+}
+
+/*
+ * sdma_wait_for_packet_egress() - wait for the VL FIFO occupancy for
+ * sdma engine 'sde' to drop to 0.
+ */
+static void sdma_wait_for_packet_egress(struct sdma_engine *sde,
+ int pause)
+{
+ u64 off = 8 * sde->this_idx;
+ struct hfi1_devdata *dd = sde->dd;
+ int lcnt = 0;
+
+ while (1) {
+ u64 reg = read_csr(dd, off + SEND_EGRESS_SEND_DMA_STATUS);
+
+ reg &= SDMA_EGRESS_PACKET_OCCUPANCY_SMASK;
+ reg >>= SDMA_EGRESS_PACKET_OCCUPANCY_SHIFT;
+ if (reg == 0)
+ break;
+ if (lcnt++ > 100) {
+ dd_dev_err(dd, "%s: engine %u timeout waiting for packets to egress, remaining count %u\n",
+ __func__, sde->this_idx, (u32)reg);
+ break;
+ }
+ udelay(1);
+ }
+}
+
+/*
+ * sdma_wait() - wait for packet egress to complete for all SDMA engines,
+ * and pause for credit return.
+ */
+void sdma_wait(struct hfi1_devdata *dd)
+{
+ int i;
+
+ for (i = 0; i < dd->num_sdma; i++) {
+ struct sdma_engine *sde = &dd->per_sdma[i];
+
+ sdma_wait_for_packet_egress(sde, 0);
+ }
+}
+
+static inline void sdma_set_desc_cnt(struct sdma_engine *sde, unsigned cnt)
+{
+ u64 reg;
+
+ if (!(sde->dd->flags & HFI1_HAS_SDMA_TIMEOUT))
+ return;
+ reg = cnt;
+ reg &= SD(DESC_CNT_CNT_MASK);
+ reg <<= SD(DESC_CNT_CNT_SHIFT);
+ write_sde_csr(sde, SD(DESC_CNT), reg);
+}
+
+/*
+ * Complete all the sdma requests with a SDMA_TXREQ_S_ABORTED status
+ *
+ * Depending on timing there can be txreqs in two places:
+ * - in the descq ring
+ * - in the flush list
+ *
+ * To avoid ordering issues the descq ring needs to be flushed
+ * first followed by the flush list.
+ *
+ * This routine is called from two places
+ * - From a work queue item
+ * - Directly from the state machine just before setting the
+ * state to running
+ *
+ * Must be called with head_lock held
+ *
+ */
+static void sdma_flush(struct sdma_engine *sde)
+{
+ struct sdma_txreq *txp, *txp_next;
+ LIST_HEAD(flushlist);
+
+ /* flush from head to tail */
+ sdma_flush_descq(sde);
+ spin_lock(&sde->flushlist_lock);
+ /* copy flush list */
+ list_for_each_entry_safe(txp, txp_next, &sde->flushlist, list) {
+ list_del_init(&txp->list);
+ list_add_tail(&txp->list, &flushlist);
+ }
+ spin_unlock(&sde->flushlist_lock);
+ /* flush from flush list */
+ list_for_each_entry_safe(txp, txp_next, &flushlist, list) {
+ int drained = 0;
+ /* protect against complete modifying */
+ struct iowait *wait = txp->wait;
+
+ list_del_init(&txp->list);
+#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
+ trace_hfi1_sdma_out_sn(sde, txp->sn);
+ if (WARN_ON_ONCE(sde->head_sn != txp->sn))
+ dd_dev_err(sde->dd, "expected %llu got %llu\n",
+ sde->head_sn, txp->sn);
+ sde->head_sn++;
+#endif
+ sdma_txclean(sde->dd, txp);
+ if (wait)
+ drained = atomic_dec_and_test(&wait->sdma_busy);
+ if (txp->complete)
+ (*txp->complete)(txp, SDMA_TXREQ_S_ABORTED, drained);
+ if (wait && drained)
+ iowait_drain_wakeup(wait);
+ }
+}
+
+/*
+ * Fields a work request for flushing the descq ring
+ * and the flush list
+ *
+ * If the engine has been brought to running during
+ * the scheduling delay, the flush is ignored, assuming
+ * that the process of bringing the engine to running
+ * would have done this flush prior to going to running.
+ *
+ */
+static void sdma_field_flush(struct work_struct *work)
+{
+ unsigned long flags;
+ struct sdma_engine *sde =
+ container_of(work, struct sdma_engine, flush_worker);
+
+ write_seqlock_irqsave(&sde->head_lock, flags);
+ if (!__sdma_running(sde))
+ sdma_flush(sde);
+ write_sequnlock_irqrestore(&sde->head_lock, flags);
+}
+
+static void sdma_err_halt_wait(struct work_struct *work)
+{
+ struct sdma_engine *sde = container_of(work, struct sdma_engine,
+ err_halt_worker);
+ u64 statuscsr;
+ unsigned long timeout;
+
+ timeout = jiffies + msecs_to_jiffies(SDMA_ERR_HALT_TIMEOUT);
+ while (1) {
+ statuscsr = read_sde_csr(sde, SD(STATUS));
+ statuscsr &= SD(STATUS_ENG_HALTED_SMASK);
+ if (statuscsr)
+ break;
+ if (time_after(jiffies, timeout)) {
+ dd_dev_err(sde->dd,
+ "SDMA engine %d - timeout waiting for engine to halt\n",
+ sde->this_idx);
+ /*
+ * Continue anyway. This could happen if there was
+ * an uncorrectable error in the wrong spot.
+ */
+ break;
+ }
+ usleep_range(80, 120);
+ }
+
+ sdma_process_event(sde, sdma_event_e15_hw_halt_done);
+}
+
+static void sdma_start_err_halt_wait(struct sdma_engine *sde)
+{
+ schedule_work(&sde->err_halt_worker);
+}
+
+
+static void sdma_err_progress_check_schedule(struct sdma_engine *sde)
+{
+ if (!is_bx(sde->dd) && HFI1_CAP_IS_KSET(SDMA_AHG)) {
+
+ unsigned index;
+ struct hfi1_devdata *dd = sde->dd;
+
+ for (index = 0; index < dd->num_sdma; index++) {
+ struct sdma_engine *curr_sdma = &dd->per_sdma[index];
+
+ if (curr_sdma != sde)
+ curr_sdma->progress_check_head =
+ curr_sdma->descq_head;
+ }
+ dd_dev_err(sde->dd,
+ "SDMA engine %d - check scheduled\n",
+ sde->this_idx);
+ mod_timer(&sde->err_progress_check_timer, jiffies + 10);
+ }
+}
+
+static void sdma_err_progress_check(unsigned long data)
+{
+ unsigned index;
+ struct sdma_engine *sde = (struct sdma_engine *)data;
+
+ dd_dev_err(sde->dd, "SDE progress check event\n");
+ for (index = 0; index < sde->dd->num_sdma; index++) {
+ struct sdma_engine *curr_sde = &sde->dd->per_sdma[index];
+ unsigned long flags;
+
+ /* check progress on each engine except the current one */
+ if (curr_sde == sde)
+ continue;
+ /*
+ * We must lock interrupts when acquiring sde->lock,
+ * to avoid a deadlock if interrupt triggers and spins on
+ * the same lock on same CPU
+ */
+ spin_lock_irqsave(&curr_sde->tail_lock, flags);
+ write_seqlock(&curr_sde->head_lock);
+
+ /* skip non-running queues */
+ if (curr_sde->state.current_state != sdma_state_s99_running) {
+ write_sequnlock(&curr_sde->head_lock);
+ spin_unlock_irqrestore(&curr_sde->tail_lock, flags);
+ continue;
+ }
+
+ if ((curr_sde->descq_head != curr_sde->descq_tail) &&
+ (curr_sde->descq_head ==
+ curr_sde->progress_check_head))
+ __sdma_process_event(curr_sde,
+ sdma_event_e90_sw_halted);
+ write_sequnlock(&curr_sde->head_lock);
+ spin_unlock_irqrestore(&curr_sde->tail_lock, flags);
+ }
+ schedule_work(&sde->err_halt_worker);
+}
+
+static void sdma_hw_clean_up_task(unsigned long opaque)
+{
+ struct sdma_engine *sde = (struct sdma_engine *) opaque;
+ u64 statuscsr;
+
+ while (1) {
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(sde->dd, "CONFIG SDMA(%u) %s:%d %s()\n",
+ sde->this_idx, slashstrip(__FILE__), __LINE__,
+ __func__);
+#endif
+ statuscsr = read_sde_csr(sde, SD(STATUS));
+ statuscsr &= SD(STATUS_ENG_CLEANED_UP_SMASK);
+ if (statuscsr)
+ break;
+ udelay(10);
+ }
+
+ sdma_process_event(sde, sdma_event_e25_hw_clean_up_done);
+}
+
+static inline struct sdma_txreq *get_txhead(struct sdma_engine *sde)
+{
+ smp_read_barrier_depends(); /* see sdma_update_tail() */
+ return sde->tx_ring[sde->tx_head & sde->sdma_mask];
+}
+
+/*
+ * flush ring for recovery
+ */
+static void sdma_flush_descq(struct sdma_engine *sde)
+{
+ u16 head, tail;
+ int progress = 0;
+ struct sdma_txreq *txp = get_txhead(sde);
+
+ /* The reason for some of the complexity of this code is that
+ * not all descriptors have corresponding txps. So, we have to
+ * be able to skip over descs until we wander into the range of
+ * the next txp on the list.
+ */
+ head = sde->descq_head & sde->sdma_mask;
+ tail = sde->descq_tail & sde->sdma_mask;
+ while (head != tail) {
+ /* advance head, wrap if needed */
+ head = ++sde->descq_head & sde->sdma_mask;
+ /* if now past this txp's descs, do the callback */
+ if (txp && txp->next_descq_idx == head) {
+ int drained = 0;
+ /* protect against complete modifying */
+ struct iowait *wait = txp->wait;
+
+ /* remove from list */
+ sde->tx_ring[sde->tx_head++ & sde->sdma_mask] = NULL;
+ if (wait)
+ drained = atomic_dec_and_test(&wait->sdma_busy);
+#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
+ trace_hfi1_sdma_out_sn(sde, txp->sn);
+ if (WARN_ON_ONCE(sde->head_sn != txp->sn))
+ dd_dev_err(sde->dd, "expected %llu got %llu\n",
+ sde->head_sn, txp->sn);
+ sde->head_sn++;
+#endif
+ sdma_txclean(sde->dd, txp);
+ trace_hfi1_sdma_progress(sde, head, tail, txp);
+ if (txp->complete)
+ (*txp->complete)(
+ txp,
+ SDMA_TXREQ_S_ABORTED,
+ drained);
+ if (wait && drained)
+ iowait_drain_wakeup(wait);
+ /* see if there is another txp */
+ txp = get_txhead(sde);
+ }
+ progress++;
+ }
+ if (progress)
+ sdma_desc_avail(sde, sdma_descq_freecnt(sde));
+}
+
+static void sdma_sw_clean_up_task(unsigned long opaque)
+{
+ struct sdma_engine *sde = (struct sdma_engine *) opaque;
+ unsigned long flags;
+
+ spin_lock_irqsave(&sde->tail_lock, flags);
+ write_seqlock(&sde->head_lock);
+
+ /*
+ * At this point, the following should always be true:
+ * - We are halted, so no more descriptors are getting retired.
+ * - We are not running, so no one is submitting new work.
+ * - Only we can send the e40_sw_cleaned, so we can't start
+ * running again until we say so. So, the active list and
+ * descq are ours to play with.
+ */
+
+
+ /*
+ * In the error clean up sequence, software clean must be called
+ * before the hardware clean so we can use the hardware head in
+ * the progress routine. A hardware clean or SPC unfreeze will
+ * reset the hardware head.
+ *
+ * Process all retired requests. The progress routine will use the
+ * latest physical hardware head - we are not running so speed does
+ * not matter.
+ */
+ sdma_make_progress(sde, 0);
+
+ sdma_flush(sde);
+
+ /*
+ * Reset our notion of head and tail.
+ * Note that the HW registers have been reset via an earlier
+ * clean up.
+ */
+ sde->descq_tail = 0;
+ sde->descq_head = 0;
+ sde->desc_avail = sdma_descq_freecnt(sde);
+ *sde->head_dma = 0;
+
+ __sdma_process_event(sde, sdma_event_e40_sw_cleaned);
+
+ write_sequnlock(&sde->head_lock);
+ spin_unlock_irqrestore(&sde->tail_lock, flags);
+}
+
+static void sdma_sw_tear_down(struct sdma_engine *sde)
+{
+ struct sdma_state *ss = &sde->state;
+
+ /* Releasing this reference means the state machine has stopped. */
+ sdma_put(ss);
+
+ /* stop waiting for all unfreeze events to complete */
+ atomic_set(&sde->dd->sdma_unfreeze_count, -1);
+ wake_up_interruptible(&sde->dd->sdma_unfreeze_wq);
+}
+
+static void sdma_start_hw_clean_up(struct sdma_engine *sde)
+{
+ tasklet_hi_schedule(&sde->sdma_hw_clean_up_task);
+}
+
+static void sdma_start_sw_clean_up(struct sdma_engine *sde)
+{
+ tasklet_hi_schedule(&sde->sdma_sw_clean_up_task);
+}
+
+static void sdma_set_state(struct sdma_engine *sde,
+ enum sdma_states next_state)
+{
+ struct sdma_state *ss = &sde->state;
+ const struct sdma_set_state_action *action = sdma_action_table;
+ unsigned op = 0;
+
+ trace_hfi1_sdma_state(
+ sde,
+ sdma_state_names[ss->current_state],
+ sdma_state_names[next_state]);
+
+ /* debugging bookkeeping */
+ ss->previous_state = ss->current_state;
+ ss->previous_op = ss->current_op;
+ ss->current_state = next_state;
+
+ if (ss->previous_state != sdma_state_s99_running
+ && next_state == sdma_state_s99_running)
+ sdma_flush(sde);
+
+ if (action[next_state].op_enable)
+ op |= SDMA_SENDCTRL_OP_ENABLE;
+
+ if (action[next_state].op_intenable)
+ op |= SDMA_SENDCTRL_OP_INTENABLE;
+
+ if (action[next_state].op_halt)
+ op |= SDMA_SENDCTRL_OP_HALT;
+
+ if (action[next_state].op_cleanup)
+ op |= SDMA_SENDCTRL_OP_CLEANUP;
+
+ if (action[next_state].go_s99_running_tofalse)
+ ss->go_s99_running = 0;
+
+ if (action[next_state].go_s99_running_totrue)
+ ss->go_s99_running = 1;
+
+ ss->current_op = op;
+ sdma_sendctrl(sde, ss->current_op);
+}
+
+/**
+ * sdma_get_descq_cnt() - called when device probed
+ *
+ * Return a validated descq count.
+ *
+ * This is currently only used in the verbs initialization to build the tx
+ * list.
+ *
+ * This will probably be deleted in favor of a more scalable approach to
+ * alloc tx's.
+ *
+ */
+u16 sdma_get_descq_cnt(void)
+{
+ u16 count = sdma_descq_cnt;
+
+ if (!count)
+ return SDMA_DESCQ_CNT;
+ /* count must be a power of 2 greater than 64 and less than
+ * 32768. Otherwise return default.
+ */
+ if (!is_power_of_2(count))
+ return SDMA_DESCQ_CNT;
+ if (count < 64 && count > 32768)
+ return SDMA_DESCQ_CNT;
+ return count;
+}
+/**
+ * sdma_select_engine_vl() - select sdma engine
+ * @dd: devdata
+ * @selector: a spreading factor
+ * @vl: this vl
+ *
+ *
+ * This function returns an engine based on the selector and a vl. The
+ * mapping fields are protected by RCU.
+ */
+struct sdma_engine *sdma_select_engine_vl(
+ struct hfi1_devdata *dd,
+ u32 selector,
+ u8 vl)
+{
+ struct sdma_vl_map *m;
+ struct sdma_map_elem *e;
+ struct sdma_engine *rval;
+
+ if (WARN_ON(vl > 8))
+ return NULL;
+
+ rcu_read_lock();
+ m = rcu_dereference(dd->sdma_map);
+ if (unlikely(!m)) {
+ rcu_read_unlock();
+ return NULL;
+ }
+ e = m->map[vl & m->mask];
+ rval = e->sde[selector & e->mask];
+ rcu_read_unlock();
+
+ trace_hfi1_sdma_engine_select(dd, selector, vl, rval->this_idx);
+ return rval;
+}
+
+/**
+ * sdma_select_engine_sc() - select sdma engine
+ * @dd: devdata
+ * @selector: a spreading factor
+ * @sc5: the 5 bit sc
+ *
+ *
+ * This function returns an engine based on the selector and an sc.
+ */
+struct sdma_engine *sdma_select_engine_sc(
+ struct hfi1_devdata *dd,
+ u32 selector,
+ u8 sc5)
+{
+ u8 vl = sc_to_vlt(dd, sc5);
+
+ return sdma_select_engine_vl(dd, selector, vl);
+}
+
+/*
+ * Free the indicated map struct
+ */
+static void sdma_map_free(struct sdma_vl_map *m)
+{
+ int i;
+
+ for (i = 0; m && i < m->actual_vls; i++)
+ kfree(m->map[i]);
+ kfree(m);
+}
+
+/*
+ * Handle RCU callback
+ */
+static void sdma_map_rcu_callback(struct rcu_head *list)
+{
+ struct sdma_vl_map *m = container_of(list, struct sdma_vl_map, list);
+
+ sdma_map_free(m);
+}
+
+/**
+ * sdma_map_init - called when # vls change
+ * @dd: hfi1_devdata
+ * @port: port number
+ * @num_vls: number of vls
+ * @vl_engines: per vl engine mapping (optional)
+ *
+ * This routine changes the mapping based on the number of vls.
+ *
+ * vl_engines is used to specify a non-uniform vl/engine loading. NULL
+ * implies auto computing the loading and giving each VLs a uniform
+ * distribution of engines per VL.
+ *
+ * The auto algorithm computes the sde_per_vl and the number of extra
+ * engines. Any extra engines are added from the last VL on down.
+ *
+ * rcu locking is used here to control access to the mapping fields.
+ *
+ * If either the num_vls or num_sdma are non-power of 2, the array sizes
+ * in the struct sdma_vl_map and the struct sdma_map_elem are rounded
+ * up to the next highest power of 2 and the first entry is reused
+ * in a round robin fashion.
+ *
+ * If an error occurs the map change is not done and the mapping is
+ * not changed.
+ *
+ */
+int sdma_map_init(struct hfi1_devdata *dd, u8 port, u8 num_vls, u8 *vl_engines)
+{
+ int i, j;
+ int extra, sde_per_vl;
+ int engine = 0;
+ u8 lvl_engines[OPA_MAX_VLS];
+ struct sdma_vl_map *oldmap, *newmap;
+
+ if (!(dd->flags & HFI1_HAS_SEND_DMA))
+ return 0;
+
+ if (!vl_engines) {
+ /* truncate divide */
+ sde_per_vl = dd->num_sdma / num_vls;
+ /* extras */
+ extra = dd->num_sdma % num_vls;
+ vl_engines = lvl_engines;
+ /* add extras from last vl down */
+ for (i = num_vls - 1; i >= 0; i--, extra--)
+ vl_engines[i] = sde_per_vl + (extra > 0 ? 1 : 0);
+ }
+ /* build new map */
+ newmap = kzalloc(
+ sizeof(struct sdma_vl_map) +
+ roundup_pow_of_two(num_vls) *
+ sizeof(struct sdma_map_elem *),
+ GFP_KERNEL);
+ if (!newmap)
+ goto bail;
+ newmap->actual_vls = num_vls;
+ newmap->vls = roundup_pow_of_two(num_vls);
+ newmap->mask = (1 << ilog2(newmap->vls)) - 1;
+ for (i = 0; i < newmap->vls; i++) {
+ /* save for wrap around */
+ int first_engine = engine;
+
+ if (i < newmap->actual_vls) {
+ int sz = roundup_pow_of_two(vl_engines[i]);
+
+ /* only allocate once */
+ newmap->map[i] = kzalloc(
+ sizeof(struct sdma_map_elem) +
+ sz * sizeof(struct sdma_engine *),
+ GFP_KERNEL);
+ if (!newmap->map[i])
+ goto bail;
+ newmap->map[i]->mask = (1 << ilog2(sz)) - 1;
+ /* assign engines */
+ for (j = 0; j < sz; j++) {
+ newmap->map[i]->sde[j] =
+ &dd->per_sdma[engine];
+ if (++engine >= first_engine + vl_engines[i])
+ /* wrap back to first engine */
+ engine = first_engine;
+ }
+ } else {
+ /* just re-use entry without allocating */
+ newmap->map[i] = newmap->map[i % num_vls];
+ }
+ engine = first_engine + vl_engines[i];
+ }
+ /* newmap in hand, save old map */
+ spin_lock_irq(&dd->sde_map_lock);
+ oldmap = rcu_dereference_protected(dd->sdma_map,
+ lockdep_is_held(&dd->sde_map_lock));
+
+ /* publish newmap */
+ rcu_assign_pointer(dd->sdma_map, newmap);
+
+ spin_unlock_irq(&dd->sde_map_lock);
+ /* success, free any old map after grace period */
+ if (oldmap)
+ call_rcu(&oldmap->list, sdma_map_rcu_callback);
+ return 0;
+bail:
+ /* free any partial allocation */
+ sdma_map_free(newmap);
+ return -ENOMEM;
+}
+
+/*
+ * Clean up allocated memory.
+ *
+ * This routine is can be called regardless of the success of sdma_init()
+ *
+ */
+static void sdma_clean(struct hfi1_devdata *dd, size_t num_engines)
+{
+ size_t i;
+ struct sdma_engine *sde;
+
+ if (dd->sdma_pad_dma) {
+ dma_free_coherent(&dd->pcidev->dev, 4,
+ (void *)dd->sdma_pad_dma,
+ dd->sdma_pad_phys);
+ dd->sdma_pad_dma = NULL;
+ dd->sdma_pad_phys = 0;
+ }
+ if (dd->sdma_heads_dma) {
+ dma_free_coherent(&dd->pcidev->dev, dd->sdma_heads_size,
+ (void *)dd->sdma_heads_dma,
+ dd->sdma_heads_phys);
+ dd->sdma_heads_dma = NULL;
+ dd->sdma_heads_phys = 0;
+ }
+ for (i = 0; dd->per_sdma && i < num_engines; ++i) {
+ sde = &dd->per_sdma[i];
+
+ sde->head_dma = NULL;
+ sde->head_phys = 0;
+
+ if (sde->descq) {
+ dma_free_coherent(
+ &dd->pcidev->dev,
+ sde->descq_cnt * sizeof(u64[2]),
+ sde->descq,
+ sde->descq_phys
+ );
+ sde->descq = NULL;
+ sde->descq_phys = 0;
+ }
+ if (is_vmalloc_addr(sde->tx_ring))
+ vfree(sde->tx_ring);
+ else
+ kfree(sde->tx_ring);
+ sde->tx_ring = NULL;
+ }
+ spin_lock_irq(&dd->sde_map_lock);
+ kfree(rcu_access_pointer(dd->sdma_map));
+ RCU_INIT_POINTER(dd->sdma_map, NULL);
+ spin_unlock_irq(&dd->sde_map_lock);
+ synchronize_rcu();
+ kfree(dd->per_sdma);
+ dd->per_sdma = NULL;
+}
+
+/**
+ * sdma_init() - called when device probed
+ * @dd: hfi1_devdata
+ * @port: port number (currently only zero)
+ *
+ * sdma_init initializes the specified number of engines.
+ *
+ * The code initializes each sde, its csrs. Interrupts
+ * are not required to be enabled.
+ *
+ * Returns:
+ * 0 - success, -errno on failure
+ */
+int sdma_init(struct hfi1_devdata *dd, u8 port)
+{
+ unsigned this_idx;
+ struct sdma_engine *sde;
+ u16 descq_cnt;
+ void *curr_head;
+ struct hfi1_pportdata *ppd = dd->pport + port;
+ u32 per_sdma_credits;
+ uint idle_cnt = sdma_idle_cnt;
+ size_t num_engines = dd->chip_sdma_engines;
+
+ if (!HFI1_CAP_IS_KSET(SDMA)) {
+ HFI1_CAP_CLEAR(SDMA_AHG);
+ return 0;
+ }
+ if (mod_num_sdma &&
+ /* can't exceed chip support */
+ mod_num_sdma <= dd->chip_sdma_engines &&
+ /* count must be >= vls */
+ mod_num_sdma >= num_vls)
+ num_engines = mod_num_sdma;
+
+ dd_dev_info(dd, "SDMA mod_num_sdma: %u\n", mod_num_sdma);
+ dd_dev_info(dd, "SDMA chip_sdma_engines: %u\n", dd->chip_sdma_engines);
+ dd_dev_info(dd, "SDMA chip_sdma_mem_size: %u\n",
+ dd->chip_sdma_mem_size);
+
+ per_sdma_credits =
+ dd->chip_sdma_mem_size/(num_engines * SDMA_BLOCK_SIZE);
+
+ /* set up freeze waitqueue */
+ init_waitqueue_head(&dd->sdma_unfreeze_wq);
+ atomic_set(&dd->sdma_unfreeze_count, 0);
+
+ descq_cnt = sdma_get_descq_cnt();
+ dd_dev_info(dd, "SDMA engines %zu descq_cnt %u\n",
+ num_engines, descq_cnt);
+
+ /* alloc memory for array of send engines */
+ dd->per_sdma = kcalloc(num_engines, sizeof(*dd->per_sdma), GFP_KERNEL);
+ if (!dd->per_sdma)
+ return -ENOMEM;
+
+ idle_cnt = ns_to_cclock(dd, idle_cnt);
+ /* Allocate memory for SendDMA descriptor FIFOs */
+ for (this_idx = 0; this_idx < num_engines; ++this_idx) {
+ sde = &dd->per_sdma[this_idx];
+ sde->dd = dd;
+ sde->ppd = ppd;
+ sde->this_idx = this_idx;
+ sde->descq_cnt = descq_cnt;
+ sde->desc_avail = sdma_descq_freecnt(sde);
+ sde->sdma_shift = ilog2(descq_cnt);
+ sde->sdma_mask = (1 << sde->sdma_shift) - 1;
+ sde->descq_full_count = 0;
+
+ /* Create a mask for all 3 chip interrupt sources */
+ sde->imask = (u64)1 << (0*TXE_NUM_SDMA_ENGINES + this_idx)
+ | (u64)1 << (1*TXE_NUM_SDMA_ENGINES + this_idx)
+ | (u64)1 << (2*TXE_NUM_SDMA_ENGINES + this_idx);
+ /* Create a mask specifically for sdma_idle */
+ sde->idle_mask =
+ (u64)1 << (2*TXE_NUM_SDMA_ENGINES + this_idx);
+ /* Create a mask specifically for sdma_progress */
+ sde->progress_mask =
+ (u64)1 << (TXE_NUM_SDMA_ENGINES + this_idx);
+ spin_lock_init(&sde->tail_lock);
+ seqlock_init(&sde->head_lock);
+ spin_lock_init(&sde->senddmactrl_lock);
+ spin_lock_init(&sde->flushlist_lock);
+ /* insure there is always a zero bit */
+ sde->ahg_bits = 0xfffffffe00000000ULL;
+
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+
+ /* set up reference counting */
+ kref_init(&sde->state.kref);
+ init_completion(&sde->state.comp);
+
+ INIT_LIST_HEAD(&sde->flushlist);
+ INIT_LIST_HEAD(&sde->dmawait);
+
+ sde->tail_csr =
+ get_kctxt_csr_addr(dd, this_idx, SD(TAIL));
+
+ if (idle_cnt)
+ dd->default_desc1 =
+ SDMA_DESC1_HEAD_TO_HOST_FLAG;
+ else
+ dd->default_desc1 =
+ SDMA_DESC1_INT_REQ_FLAG;
+
+ tasklet_init(&sde->sdma_hw_clean_up_task, sdma_hw_clean_up_task,
+ (unsigned long)sde);
+
+ tasklet_init(&sde->sdma_sw_clean_up_task, sdma_sw_clean_up_task,
+ (unsigned long)sde);
+ INIT_WORK(&sde->err_halt_worker, sdma_err_halt_wait);
+ INIT_WORK(&sde->flush_worker, sdma_field_flush);
+
+ sde->progress_check_head = 0;
+
+ init_timer(&sde->err_progress_check_timer);
+ sde->err_progress_check_timer.function =
+ sdma_err_progress_check;
+ sde->err_progress_check_timer.data = (unsigned long)sde;
+
+ sde->descq = dma_zalloc_coherent(
+ &dd->pcidev->dev,
+ descq_cnt * sizeof(u64[2]),
+ &sde->descq_phys,
+ GFP_KERNEL
+ );
+ if (!sde->descq)
+ goto bail;
+ sde->tx_ring =
+ kcalloc(descq_cnt, sizeof(struct sdma_txreq *),
+ GFP_KERNEL);
+ if (!sde->tx_ring)
+ sde->tx_ring =
+ vzalloc(
+ sizeof(struct sdma_txreq *) *
+ descq_cnt);
+ if (!sde->tx_ring)
+ goto bail;
+ }
+
+ dd->sdma_heads_size = L1_CACHE_BYTES * num_engines;
+ /* Allocate memory for DMA of head registers to memory */
+ dd->sdma_heads_dma = dma_zalloc_coherent(
+ &dd->pcidev->dev,
+ dd->sdma_heads_size,
+ &dd->sdma_heads_phys,
+ GFP_KERNEL
+ );
+ if (!dd->sdma_heads_dma) {
+ dd_dev_err(dd, "failed to allocate SendDMA head memory\n");
+ goto bail;
+ }
+
+ /* Allocate memory for pad */
+ dd->sdma_pad_dma = dma_zalloc_coherent(
+ &dd->pcidev->dev,
+ sizeof(u32),
+ &dd->sdma_pad_phys,
+ GFP_KERNEL
+ );
+ if (!dd->sdma_pad_dma) {
+ dd_dev_err(dd, "failed to allocate SendDMA pad memory\n");
+ goto bail;
+ }
+
+ /* assign each engine to different cacheline and init registers */
+ curr_head = (void *)dd->sdma_heads_dma;
+ for (this_idx = 0; this_idx < num_engines; ++this_idx) {
+ unsigned long phys_offset;
+
+ sde = &dd->per_sdma[this_idx];
+
+ sde->head_dma = curr_head;
+ curr_head += L1_CACHE_BYTES;
+ phys_offset = (unsigned long)sde->head_dma -
+ (unsigned long)dd->sdma_heads_dma;
+ sde->head_phys = dd->sdma_heads_phys + phys_offset;
+ init_sdma_regs(sde, per_sdma_credits, idle_cnt);
+ }
+ dd->flags |= HFI1_HAS_SEND_DMA;
+ dd->flags |= idle_cnt ? HFI1_HAS_SDMA_TIMEOUT : 0;
+ dd->num_sdma = num_engines;
+ if (sdma_map_init(dd, port, ppd->vls_operational, NULL))
+ goto bail;
+ dd_dev_info(dd, "SDMA num_sdma: %u\n", dd->num_sdma);
+ return 0;
+
+bail:
+ sdma_clean(dd, num_engines);
+ return -ENOMEM;
+}
+
+/**
+ * sdma_all_running() - called when the link goes up
+ * @dd: hfi1_devdata
+ *
+ * This routine moves all engines to the running state.
+ */
+void sdma_all_running(struct hfi1_devdata *dd)
+{
+ struct sdma_engine *sde;
+ unsigned int i;
+
+ /* move all engines to running */
+ for (i = 0; i < dd->num_sdma; ++i) {
+ sde = &dd->per_sdma[i];
+ sdma_process_event(sde, sdma_event_e30_go_running);
+ }
+}
+
+/**
+ * sdma_all_idle() - called when the link goes down
+ * @dd: hfi1_devdata
+ *
+ * This routine moves all engines to the idle state.
+ */
+void sdma_all_idle(struct hfi1_devdata *dd)
+{
+ struct sdma_engine *sde;
+ unsigned int i;
+
+ /* idle all engines */
+ for (i = 0; i < dd->num_sdma; ++i) {
+ sde = &dd->per_sdma[i];
+ sdma_process_event(sde, sdma_event_e70_go_idle);
+ }
+}
+
+/**
+ * sdma_start() - called to kick off state processing for all engines
+ * @dd: hfi1_devdata
+ *
+ * This routine is for kicking off the state processing for all required
+ * sdma engines. Interrupts need to be working at this point.
+ *
+ */
+void sdma_start(struct hfi1_devdata *dd)
+{
+ unsigned i;
+ struct sdma_engine *sde;
+
+ /* kick off the engines state processing */
+ for (i = 0; i < dd->num_sdma; ++i) {
+ sde = &dd->per_sdma[i];
+ sdma_process_event(sde, sdma_event_e10_go_hw_start);
+ }
+}
+
+/**
+ * sdma_exit() - used when module is removed
+ * @dd: hfi1_devdata
+ */
+void sdma_exit(struct hfi1_devdata *dd)
+{
+ unsigned this_idx;
+ struct sdma_engine *sde;
+
+ for (this_idx = 0; dd->per_sdma && this_idx < dd->num_sdma;
+ ++this_idx) {
+
+ sde = &dd->per_sdma[this_idx];
+ if (!list_empty(&sde->dmawait))
+ dd_dev_err(dd, "sde %u: dmawait list not empty!\n",
+ sde->this_idx);
+ sdma_process_event(sde, sdma_event_e00_go_hw_down);
+
+ del_timer_sync(&sde->err_progress_check_timer);
+
+ /*
+ * This waits for the state machine to exit so it is not
+ * necessary to kill the sdma_sw_clean_up_task to make sure
+ * it is not running.
+ */
+ sdma_finalput(&sde->state);
+ }
+ sdma_clean(dd, dd->num_sdma);
+}
+
+/*
+ * unmap the indicated descriptor
+ */
+static inline void sdma_unmap_desc(
+ struct hfi1_devdata *dd,
+ struct sdma_desc *descp)
+{
+ switch (sdma_mapping_type(descp)) {
+ case SDMA_MAP_SINGLE:
+ dma_unmap_single(
+ &dd->pcidev->dev,
+ sdma_mapping_addr(descp),
+ sdma_mapping_len(descp),
+ DMA_TO_DEVICE);
+ break;
+ case SDMA_MAP_PAGE:
+ dma_unmap_page(
+ &dd->pcidev->dev,
+ sdma_mapping_addr(descp),
+ sdma_mapping_len(descp),
+ DMA_TO_DEVICE);
+ break;
+ }
+}
+
+/*
+ * return the mode as indicated by the first
+ * descriptor in the tx.
+ */
+static inline u8 ahg_mode(struct sdma_txreq *tx)
+{
+ return (tx->descp[0].qw[1] & SDMA_DESC1_HEADER_MODE_SMASK)
+ >> SDMA_DESC1_HEADER_MODE_SHIFT;
+}
+
+/**
+ * sdma_txclean() - clean tx of mappings, descp *kmalloc's
+ * @dd: hfi1_devdata for unmapping
+ * @tx: tx request to clean
+ *
+ * This is used in the progress routine to clean the tx or
+ * by the ULP to toss an in-process tx build.
+ *
+ * The code can be called multiple times without issue.
+ *
+ */
+void sdma_txclean(
+ struct hfi1_devdata *dd,
+ struct sdma_txreq *tx)
+{
+ u16 i;
+
+ if (tx->num_desc) {
+ u8 skip = 0, mode = ahg_mode(tx);
+
+ /* unmap first */
+ sdma_unmap_desc(dd, &tx->descp[0]);
+ /* determine number of AHG descriptors to skip */
+ if (mode > SDMA_AHG_APPLY_UPDATE1)
+ skip = mode >> 1;
+ for (i = 1 + skip; i < tx->num_desc; i++)
+ sdma_unmap_desc(dd, &tx->descp[i]);
+ tx->num_desc = 0;
+ }
+ kfree(tx->coalesce_buf);
+ tx->coalesce_buf = NULL;
+ /* kmalloc'ed descp */
+ if (unlikely(tx->desc_limit > ARRAY_SIZE(tx->descs))) {
+ tx->desc_limit = ARRAY_SIZE(tx->descs);
+ kfree(tx->descp);
+ }
+}
+
+static inline u16 sdma_gethead(struct sdma_engine *sde)
+{
+ struct hfi1_devdata *dd = sde->dd;
+ int use_dmahead;
+ u16 hwhead;
+
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(sde->dd, "CONFIG SDMA(%u) %s:%d %s()\n",
+ sde->this_idx, slashstrip(__FILE__), __LINE__, __func__);
+#endif
+
+retry:
+ use_dmahead = HFI1_CAP_IS_KSET(USE_SDMA_HEAD) && __sdma_running(sde) &&
+ (dd->flags & HFI1_HAS_SDMA_TIMEOUT);
+ hwhead = use_dmahead ?
+ (u16) le64_to_cpu(*sde->head_dma) :
+ (u16) read_sde_csr(sde, SD(HEAD));
+
+ if (unlikely(HFI1_CAP_IS_KSET(SDMA_HEAD_CHECK))) {
+ u16 cnt;
+ u16 swtail;
+ u16 swhead;
+ int sane;
+
+ swhead = sde->descq_head & sde->sdma_mask;
+ /* this code is really bad for cache line trading */
+ swtail = ACCESS_ONCE(sde->descq_tail) & sde->sdma_mask;
+ cnt = sde->descq_cnt;
+
+ if (swhead < swtail)
+ /* not wrapped */
+ sane = (hwhead >= swhead) & (hwhead <= swtail);
+ else if (swhead > swtail)
+ /* wrapped around */
+ sane = ((hwhead >= swhead) && (hwhead < cnt)) ||
+ (hwhead <= swtail);
+ else
+ /* empty */
+ sane = (hwhead == swhead);
+
+ if (unlikely(!sane)) {
+ dd_dev_err(dd, "SDMA(%u) bad head (%s) hwhd=%hu swhd=%hu swtl=%hu cnt=%hu\n",
+ sde->this_idx,
+ use_dmahead ? "dma" : "kreg",
+ hwhead, swhead, swtail, cnt);
+ if (use_dmahead) {
+ /* try one more time, using csr */
+ use_dmahead = 0;
+ goto retry;
+ }
+ /* proceed as if no progress */
+ hwhead = swhead;
+ }
+ }
+ return hwhead;
+}
+
+/*
+ * This is called when there are send DMA descriptors that might be
+ * available.
+ *
+ * This is called with head_lock held.
+ */
+static void sdma_desc_avail(struct sdma_engine *sde, unsigned avail)
+{
+ struct iowait *wait, *nw;
+ struct iowait *waits[SDMA_WAIT_BATCH_SIZE];
+ unsigned i, n = 0, seq;
+ struct sdma_txreq *stx;
+ struct hfi1_ibdev *dev = &sde->dd->verbs_dev;
+
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(sde->dd, "CONFIG SDMA(%u) %s:%d %s()\n", sde->this_idx,
+ slashstrip(__FILE__), __LINE__, __func__);
+ dd_dev_err(sde->dd, "avail: %u\n", avail);
+#endif
+
+ do {
+ seq = read_seqbegin(&dev->iowait_lock);
+ if (!list_empty(&sde->dmawait)) {
+ /* at least one item */
+ write_seqlock(&dev->iowait_lock);
+ /* Harvest waiters wanting DMA descriptors */
+ list_for_each_entry_safe(
+ wait,
+ nw,
+ &sde->dmawait,
+ list) {
+ u16 num_desc = 0;
+
+ if (!wait->wakeup)
+ continue;
+ if (n == ARRAY_SIZE(waits))
+ break;
+ if (!list_empty(&wait->tx_head)) {
+ stx = list_first_entry(
+ &wait->tx_head,
+ struct sdma_txreq,
+ list);
+ num_desc = stx->num_desc;
+ }
+ if (num_desc > avail)
+ break;
+ avail -= num_desc;
+ list_del_init(&wait->list);
+ waits[n++] = wait;
+ }
+ write_sequnlock(&dev->iowait_lock);
+ break;
+ }
+ } while (read_seqretry(&dev->iowait_lock, seq));
+
+ for (i = 0; i < n; i++)
+ waits[i]->wakeup(waits[i], SDMA_AVAIL_REASON);
+}
+
+/* head_lock must be held */
+static void sdma_make_progress(struct sdma_engine *sde, u64 status)
+{
+ struct sdma_txreq *txp = NULL;
+ int progress = 0;
+ u16 hwhead, swhead, swtail;
+ int idle_check_done = 0;
+
+ hwhead = sdma_gethead(sde);
+
+ /* The reason for some of the complexity of this code is that
+ * not all descriptors have corresponding txps. So, we have to
+ * be able to skip over descs until we wander into the range of
+ * the next txp on the list.
+ */
+
+retry:
+ txp = get_txhead(sde);
+ swhead = sde->descq_head & sde->sdma_mask;
+ trace_hfi1_sdma_progress(sde, hwhead, swhead, txp);
+ while (swhead != hwhead) {
+ /* advance head, wrap if needed */
+ swhead = ++sde->descq_head & sde->sdma_mask;
+
+ /* if now past this txp's descs, do the callback */
+ if (txp && txp->next_descq_idx == swhead) {
+ int drained = 0;
+ /* protect against complete modifying */
+ struct iowait *wait = txp->wait;
+
+ /* remove from list */
+ sde->tx_ring[sde->tx_head++ & sde->sdma_mask] = NULL;
+ if (wait)
+ drained = atomic_dec_and_test(&wait->sdma_busy);
+#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
+ trace_hfi1_sdma_out_sn(sde, txp->sn);
+ if (WARN_ON_ONCE(sde->head_sn != txp->sn))
+ dd_dev_err(sde->dd, "expected %llu got %llu\n",
+ sde->head_sn, txp->sn);
+ sde->head_sn++;
+#endif
+ sdma_txclean(sde->dd, txp);
+ if (txp->complete)
+ (*txp->complete)(
+ txp,
+ SDMA_TXREQ_S_OK,
+ drained);
+ if (wait && drained)
+ iowait_drain_wakeup(wait);
+ /* see if there is another txp */
+ txp = get_txhead(sde);
+ }
+ trace_hfi1_sdma_progress(sde, hwhead, swhead, txp);
+ progress++;
+ }
+
+ /*
+ * The SDMA idle interrupt is not guaranteed to be ordered with respect
+ * to updates to the the dma_head location in host memory. The head
+ * value read might not be fully up to date. If there are pending
+ * descriptors and the SDMA idle interrupt fired then read from the
+ * CSR SDMA head instead to get the latest value from the hardware.
+ * The hardware SDMA head should be read at most once in this invocation
+ * of sdma_make_progress(..) which is ensured by idle_check_done flag
+ */
+ if ((status & sde->idle_mask) && !idle_check_done) {
+ swtail = ACCESS_ONCE(sde->descq_tail) & sde->sdma_mask;
+ if (swtail != hwhead) {
+ hwhead = (u16)read_sde_csr(sde, SD(HEAD));
+ idle_check_done = 1;
+ goto retry;
+ }
+ }
+
+ sde->last_status = status;
+ if (progress)
+ sdma_desc_avail(sde, sdma_descq_freecnt(sde));
+}
+
+/*
+ * sdma_engine_interrupt() - interrupt handler for engine
+ * @sde: sdma engine
+ * @status: sdma interrupt reason
+ *
+ * Status is a mask of the 3 possible interrupts for this engine. It will
+ * contain bits _only_ for this SDMA engine. It will contain at least one
+ * bit, it may contain more.
+ */
+void sdma_engine_interrupt(struct sdma_engine *sde, u64 status)
+{
+ trace_hfi1_sdma_engine_interrupt(sde, status);
+ write_seqlock(&sde->head_lock);
+ sdma_set_desc_cnt(sde, sde->descq_cnt / 2);
+ sdma_make_progress(sde, status);
+ write_sequnlock(&sde->head_lock);
+}
+
+/**
+ * sdma_engine_error() - error handler for engine
+ * @sde: sdma engine
+ * @status: sdma interrupt reason
+ */
+void sdma_engine_error(struct sdma_engine *sde, u64 status)
+{
+ unsigned long flags;
+
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(sde->dd, "CONFIG SDMA(%u) error status 0x%llx state %s\n",
+ sde->this_idx,
+ (unsigned long long)status,
+ sdma_state_names[sde->state.current_state]);
+#endif
+ spin_lock_irqsave(&sde->tail_lock, flags);
+ write_seqlock(&sde->head_lock);
+ if (status & ALL_SDMA_ENG_HALT_ERRS)
+ __sdma_process_event(sde, sdma_event_e60_hw_halted);
+ if (status & ~SD(ENG_ERR_STATUS_SDMA_HALT_ERR_SMASK)) {
+ dd_dev_err(sde->dd,
+ "SDMA (%u) engine error: 0x%llx state %s\n",
+ sde->this_idx,
+ (unsigned long long)status,
+ sdma_state_names[sde->state.current_state]);
+ dump_sdma_state(sde);
+ }
+ write_sequnlock(&sde->head_lock);
+ spin_unlock_irqrestore(&sde->tail_lock, flags);
+}
+
+static void sdma_sendctrl(struct sdma_engine *sde, unsigned op)
+{
+ u64 set_senddmactrl = 0;
+ u64 clr_senddmactrl = 0;
+ unsigned long flags;
+
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(sde->dd, "CONFIG SDMA(%u) senddmactrl E=%d I=%d H=%d C=%d\n",
+ sde->this_idx,
+ (op & SDMA_SENDCTRL_OP_ENABLE) ? 1 : 0,
+ (op & SDMA_SENDCTRL_OP_INTENABLE) ? 1 : 0,
+ (op & SDMA_SENDCTRL_OP_HALT) ? 1 : 0,
+ (op & SDMA_SENDCTRL_OP_CLEANUP) ? 1 : 0);
+#endif
+
+ if (op & SDMA_SENDCTRL_OP_ENABLE)
+ set_senddmactrl |= SD(CTRL_SDMA_ENABLE_SMASK);
+ else
+ clr_senddmactrl |= SD(CTRL_SDMA_ENABLE_SMASK);
+
+ if (op & SDMA_SENDCTRL_OP_INTENABLE)
+ set_senddmactrl |= SD(CTRL_SDMA_INT_ENABLE_SMASK);
+ else
+ clr_senddmactrl |= SD(CTRL_SDMA_INT_ENABLE_SMASK);
+
+ if (op & SDMA_SENDCTRL_OP_HALT)
+ set_senddmactrl |= SD(CTRL_SDMA_HALT_SMASK);
+ else
+ clr_senddmactrl |= SD(CTRL_SDMA_HALT_SMASK);
+
+ spin_lock_irqsave(&sde->senddmactrl_lock, flags);
+
+ sde->p_senddmactrl |= set_senddmactrl;
+ sde->p_senddmactrl &= ~clr_senddmactrl;
+
+ if (op & SDMA_SENDCTRL_OP_CLEANUP)
+ write_sde_csr(sde, SD(CTRL),
+ sde->p_senddmactrl |
+ SD(CTRL_SDMA_CLEANUP_SMASK));
+ else
+ write_sde_csr(sde, SD(CTRL), sde->p_senddmactrl);
+
+ spin_unlock_irqrestore(&sde->senddmactrl_lock, flags);
+
+#ifdef CONFIG_SDMA_VERBOSITY
+ sdma_dumpstate(sde);
+#endif
+}
+
+static void sdma_setlengen(struct sdma_engine *sde)
+{
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(sde->dd, "CONFIG SDMA(%u) %s:%d %s()\n",
+ sde->this_idx, slashstrip(__FILE__), __LINE__, __func__);
+#endif
+
+ /*
+ * Set SendDmaLenGen and clear-then-set the MSB of the generation
+ * count to enable generation checking and load the internal
+ * generation counter.
+ */
+ write_sde_csr(sde, SD(LEN_GEN),
+ (sde->descq_cnt/64) << SD(LEN_GEN_LENGTH_SHIFT)
+ );
+ write_sde_csr(sde, SD(LEN_GEN),
+ ((sde->descq_cnt/64) << SD(LEN_GEN_LENGTH_SHIFT))
+ | (4ULL << SD(LEN_GEN_GENERATION_SHIFT))
+ );
+}
+
+static inline void sdma_update_tail(struct sdma_engine *sde, u16 tail)
+{
+ /* Commit writes to memory and advance the tail on the chip */
+ smp_wmb(); /* see get_txhead() */
+ writeq(tail, sde->tail_csr);
+}
+
+/*
+ * This is called when changing to state s10_hw_start_up_halt_wait as
+ * a result of send buffer errors or send DMA descriptor errors.
+ */
+static void sdma_hw_start_up(struct sdma_engine *sde)
+{
+ u64 reg;
+
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(sde->dd, "CONFIG SDMA(%u) %s:%d %s()\n",
+ sde->this_idx, slashstrip(__FILE__), __LINE__, __func__);
+#endif
+
+ sdma_setlengen(sde);
+ sdma_update_tail(sde, 0); /* Set SendDmaTail */
+ *sde->head_dma = 0;
+
+ reg = SD(ENG_ERR_CLEAR_SDMA_HEADER_REQUEST_FIFO_UNC_ERR_MASK) <<
+ SD(ENG_ERR_CLEAR_SDMA_HEADER_REQUEST_FIFO_UNC_ERR_SHIFT);
+ write_sde_csr(sde, SD(ENG_ERR_CLEAR), reg);
+}
+
+#define CLEAR_STATIC_RATE_CONTROL_SMASK(r) \
+(r &= ~SEND_DMA_CHECK_ENABLE_DISALLOW_PBC_STATIC_RATE_CONTROL_SMASK)
+
+#define SET_STATIC_RATE_CONTROL_SMASK(r) \
+(r |= SEND_DMA_CHECK_ENABLE_DISALLOW_PBC_STATIC_RATE_CONTROL_SMASK)
+/*
+ * set_sdma_integrity
+ *
+ * Set the SEND_DMA_CHECK_ENABLE register for send DMA engine 'sde'.
+ */
+static void set_sdma_integrity(struct sdma_engine *sde)
+{
+ struct hfi1_devdata *dd = sde->dd;
+ u64 reg;
+
+ if (unlikely(HFI1_CAP_IS_KSET(NO_INTEGRITY)))
+ return;
+
+ reg = hfi1_pkt_base_sdma_integrity(dd);
+
+ if (HFI1_CAP_IS_KSET(STATIC_RATE_CTRL))
+ CLEAR_STATIC_RATE_CONTROL_SMASK(reg);
+ else
+ SET_STATIC_RATE_CONTROL_SMASK(reg);
+
+ write_sde_csr(sde, SD(CHECK_ENABLE), reg);
+}
+
+
+static void init_sdma_regs(
+ struct sdma_engine *sde,
+ u32 credits,
+ uint idle_cnt)
+{
+ u8 opval, opmask;
+#ifdef CONFIG_SDMA_VERBOSITY
+ struct hfi1_devdata *dd = sde->dd;
+
+ dd_dev_err(dd, "CONFIG SDMA(%u) %s:%d %s()\n",
+ sde->this_idx, slashstrip(__FILE__), __LINE__, __func__);
+#endif
+
+ write_sde_csr(sde, SD(BASE_ADDR), sde->descq_phys);
+ sdma_setlengen(sde);
+ sdma_update_tail(sde, 0); /* Set SendDmaTail */
+ write_sde_csr(sde, SD(RELOAD_CNT), idle_cnt);
+ write_sde_csr(sde, SD(DESC_CNT), 0);
+ write_sde_csr(sde, SD(HEAD_ADDR), sde->head_phys);
+ write_sde_csr(sde, SD(MEMORY),
+ ((u64)credits <<
+ SD(MEMORY_SDMA_MEMORY_CNT_SHIFT)) |
+ ((u64)(credits * sde->this_idx) <<
+ SD(MEMORY_SDMA_MEMORY_INDEX_SHIFT)));
+ write_sde_csr(sde, SD(ENG_ERR_MASK), ~0ull);
+ set_sdma_integrity(sde);
+ opmask = OPCODE_CHECK_MASK_DISABLED;
+ opval = OPCODE_CHECK_VAL_DISABLED;
+ write_sde_csr(sde, SD(CHECK_OPCODE),
+ (opmask << SEND_CTXT_CHECK_OPCODE_MASK_SHIFT) |
+ (opval << SEND_CTXT_CHECK_OPCODE_VALUE_SHIFT));
+}
+
+#ifdef CONFIG_SDMA_VERBOSITY
+
+#define sdma_dumpstate_helper0(reg) do { \
+ csr = read_csr(sde->dd, reg); \
+ dd_dev_err(sde->dd, "%36s 0x%016llx\n", #reg, csr); \
+ } while (0)
+
+#define sdma_dumpstate_helper(reg) do { \
+ csr = read_sde_csr(sde, reg); \
+ dd_dev_err(sde->dd, "%36s[%02u] 0x%016llx\n", \
+ #reg, sde->this_idx, csr); \
+ } while (0)
+
+#define sdma_dumpstate_helper2(reg) do { \
+ csr = read_csr(sde->dd, reg + (8 * i)); \
+ dd_dev_err(sde->dd, "%33s_%02u 0x%016llx\n", \
+ #reg, i, csr); \
+ } while (0)
+
+void sdma_dumpstate(struct sdma_engine *sde)
+{
+ u64 csr;
+ unsigned i;
+
+ sdma_dumpstate_helper(SD(CTRL));
+ sdma_dumpstate_helper(SD(STATUS));
+ sdma_dumpstate_helper0(SD(ERR_STATUS));
+ sdma_dumpstate_helper0(SD(ERR_MASK));
+ sdma_dumpstate_helper(SD(ENG_ERR_STATUS));
+ sdma_dumpstate_helper(SD(ENG_ERR_MASK));
+
+ for (i = 0; i < CCE_NUM_INT_CSRS; ++i) {
+ sdma_dumpstate_helper2(CCE_INT_STATUS));
+ sdma_dumpstate_helper2(CCE_INT_MASK);
+ sdma_dumpstate_helper2(CCE_INT_BLOCKED);
+ }
+
+ sdma_dumpstate_helper(SD(TAIL));
+ sdma_dumpstate_helper(SD(HEAD));
+ sdma_dumpstate_helper(SD(PRIORITY_THLD));
+ sdma_dumpstate_helper(SD(IDLE_CNT);
+ sdma_dumpstate_helper(SD(RELOAD_CNT));
+ sdma_dumpstate_helper(SD(DESC_CNT));
+ sdma_dumpstate_helper(SD(DESC_FETCHED_CNT));
+ sdma_dumpstate_helper(SD(MEMORY));
+ sdma_dumpstate_helper0(SD(ENGINES));
+ sdma_dumpstate_helper0(SD(MEM_SIZE));
+ /* sdma_dumpstate_helper(SEND_EGRESS_SEND_DMA_STATUS); */
+ sdma_dumpstate_helper(SD(BASE_ADDR));
+ sdma_dumpstate_helper(SD(LEN_GEN));
+ sdma_dumpstate_helper(SD(HEAD_ADDR));
+ sdma_dumpstate_helper(SD(CHECK_ENABLE));
+ sdma_dumpstate_helper(SD(CHECK_VL));
+ sdma_dumpstate_helper(SD(CHECK_JOB_KEY));
+ sdma_dumpstate_helper(SD(CHECK_PARTITION_KEY));
+ sdma_dumpstate_helper(SD(CHECK_SLID));
+ sdma_dumpstate_helper(SD(CHECK_OPCODE));
+}
+#endif
+
+static void dump_sdma_state(struct sdma_engine *sde)
+{
+ struct hw_sdma_desc *descq;
+ struct hw_sdma_desc *descqp;
+ u64 desc[2];
+ u64 addr;
+ u8 gen;
+ u16 len;
+ u16 head, tail, cnt;
+
+ head = sde->descq_head & sde->sdma_mask;
+ tail = sde->descq_tail & sde->sdma_mask;
+ cnt = sdma_descq_freecnt(sde);
+ descq = sde->descq;
+
+ dd_dev_err(sde->dd,
+ "SDMA (%u) descq_head: %u descq_tail: %u freecnt: %u FLE %d\n",
+ sde->this_idx,
+ head,
+ tail,
+ cnt,
+ !list_empty(&sde->flushlist));
+
+ /* print info for each entry in the descriptor queue */
+ while (head != tail) {
+ char flags[6] = { 'x', 'x', 'x', 'x', 0 };
+
+ descqp = &sde->descq[head];
+ desc[0] = le64_to_cpu(descqp->qw[0]);
+ desc[1] = le64_to_cpu(descqp->qw[1]);
+ flags[0] = (desc[1] & SDMA_DESC1_INT_REQ_FLAG) ? 'I' : '-';
+ flags[1] = (desc[1] & SDMA_DESC1_HEAD_TO_HOST_FLAG) ?
+ 'H' : '-';
+ flags[2] = (desc[0] & SDMA_DESC0_FIRST_DESC_FLAG) ? 'F' : '-';
+ flags[3] = (desc[0] & SDMA_DESC0_LAST_DESC_FLAG) ? 'L' : '-';
+ addr = (desc[0] >> SDMA_DESC0_PHY_ADDR_SHIFT)
+ & SDMA_DESC0_PHY_ADDR_MASK;
+ gen = (desc[1] >> SDMA_DESC1_GENERATION_SHIFT)
+ & SDMA_DESC1_GENERATION_MASK;
+ len = (desc[0] >> SDMA_DESC0_BYTE_COUNT_SHIFT)
+ & SDMA_DESC0_BYTE_COUNT_MASK;
+ dd_dev_err(sde->dd,
+ "SDMA sdmadesc[%u]: flags:%s addr:0x%016llx gen:%u len:%u bytes\n",
+ head, flags, addr, gen, len);
+ dd_dev_err(sde->dd,
+ "\tdesc0:0x%016llx desc1 0x%016llx\n",
+ desc[0], desc[1]);
+ if (desc[0] & SDMA_DESC0_FIRST_DESC_FLAG)
+ dd_dev_err(sde->dd,
+ "\taidx: %u amode: %u alen: %u\n",
+ (u8)((desc[1] & SDMA_DESC1_HEADER_INDEX_SMASK)
+ >> SDMA_DESC1_HEADER_INDEX_MASK),
+ (u8)((desc[1] & SDMA_DESC1_HEADER_MODE_SMASK)
+ >> SDMA_DESC1_HEADER_MODE_SHIFT),
+ (u8)((desc[1] & SDMA_DESC1_HEADER_DWS_SMASK)
+ >> SDMA_DESC1_HEADER_DWS_SHIFT));
+ head++;
+ head &= sde->sdma_mask;
+ }
+}
+
+#define SDE_FMT \
+ "SDE %u STE %s C 0x%llx S 0x%016llx E 0x%llx T(HW) 0x%llx T(SW) 0x%x H(HW) 0x%llx H(SW) 0x%x H(D) 0x%llx DM 0x%llx GL 0x%llx R 0x%llx LIS 0x%llx AHGI 0x%llx TXT %u TXH %u DT %u DH %u FLNE %d DQF %u SLC 0x%llx\n"
+/**
+ * sdma_seqfile_dump_sde() - debugfs dump of sde
+ * @s: seq file
+ * @sde: send dma engine to dump
+ *
+ * This routine dumps the sde to the indicated seq file.
+ */
+void sdma_seqfile_dump_sde(struct seq_file *s, struct sdma_engine *sde)
+{
+ u16 head, tail;
+ struct hw_sdma_desc *descqp;
+ u64 desc[2];
+ u64 addr;
+ u8 gen;
+ u16 len;
+
+ head = sde->descq_head & sde->sdma_mask;
+ tail = ACCESS_ONCE(sde->descq_tail) & sde->sdma_mask;
+ seq_printf(s, SDE_FMT, sde->this_idx,
+ sdma_state_name(sde->state.current_state),
+ (unsigned long long)read_sde_csr(sde, SD(CTRL)),
+ (unsigned long long)read_sde_csr(sde, SD(STATUS)),
+ (unsigned long long)read_sde_csr(sde,
+ SD(ENG_ERR_STATUS)),
+ (unsigned long long)read_sde_csr(sde, SD(TAIL)),
+ tail,
+ (unsigned long long)read_sde_csr(sde, SD(HEAD)),
+ head,
+ (unsigned long long)le64_to_cpu(*sde->head_dma),
+ (unsigned long long)read_sde_csr(sde, SD(MEMORY)),
+ (unsigned long long)read_sde_csr(sde, SD(LEN_GEN)),
+ (unsigned long long)read_sde_csr(sde, SD(RELOAD_CNT)),
+ (unsigned long long)sde->last_status,
+ (unsigned long long)sde->ahg_bits,
+ sde->tx_tail,
+ sde->tx_head,
+ sde->descq_tail,
+ sde->descq_head,
+ !list_empty(&sde->flushlist),
+ sde->descq_full_count,
+ (unsigned long long)read_sde_csr(sde, SEND_DMA_CHECK_SLID));
+
+ /* print info for each entry in the descriptor queue */
+ while (head != tail) {
+ char flags[6] = { 'x', 'x', 'x', 'x', 0 };
+
+ descqp = &sde->descq[head];
+ desc[0] = le64_to_cpu(descqp->qw[0]);
+ desc[1] = le64_to_cpu(descqp->qw[1]);
+ flags[0] = (desc[1] & SDMA_DESC1_INT_REQ_FLAG) ? 'I' : '-';
+ flags[1] = (desc[1] & SDMA_DESC1_HEAD_TO_HOST_FLAG) ?
+ 'H' : '-';
+ flags[2] = (desc[0] & SDMA_DESC0_FIRST_DESC_FLAG) ? 'F' : '-';
+ flags[3] = (desc[0] & SDMA_DESC0_LAST_DESC_FLAG) ? 'L' : '-';
+ addr = (desc[0] >> SDMA_DESC0_PHY_ADDR_SHIFT)
+ & SDMA_DESC0_PHY_ADDR_MASK;
+ gen = (desc[1] >> SDMA_DESC1_GENERATION_SHIFT)
+ & SDMA_DESC1_GENERATION_MASK;
+ len = (desc[0] >> SDMA_DESC0_BYTE_COUNT_SHIFT)
+ & SDMA_DESC0_BYTE_COUNT_MASK;
+ seq_printf(s,
+ "\tdesc[%u]: flags:%s addr:0x%016llx gen:%u len:%u bytes\n",
+ head, flags, addr, gen, len);
+ if (desc[0] & SDMA_DESC0_FIRST_DESC_FLAG)
+ seq_printf(s, "\t\tahgidx: %u ahgmode: %u\n",
+ (u8)((desc[1] & SDMA_DESC1_HEADER_INDEX_SMASK)
+ >> SDMA_DESC1_HEADER_INDEX_MASK),
+ (u8)((desc[1] & SDMA_DESC1_HEADER_MODE_SMASK)
+ >> SDMA_DESC1_HEADER_MODE_SHIFT));
+ head = (head + 1) & sde->sdma_mask;
+ }
+}
+
+/*
+ * add the generation number into
+ * the qw1 and return
+ */
+static inline u64 add_gen(struct sdma_engine *sde, u64 qw1)
+{
+ u8 generation = (sde->descq_tail >> sde->sdma_shift) & 3;
+
+ qw1 &= ~SDMA_DESC1_GENERATION_SMASK;
+ qw1 |= ((u64)generation & SDMA_DESC1_GENERATION_MASK)
+ << SDMA_DESC1_GENERATION_SHIFT;
+ return qw1;
+}
+
+/*
+ * This routine submits the indicated tx
+ *
+ * Space has already been guaranteed and
+ * tail side of ring is locked.
+ *
+ * The hardware tail update is done
+ * in the caller and that is facilitated
+ * by returning the new tail.
+ *
+ * There is special case logic for ahg
+ * to not add the generation number for
+ * up to 2 descriptors that follow the
+ * first descriptor.
+ *
+ */
+static inline u16 submit_tx(struct sdma_engine *sde, struct sdma_txreq *tx)
+{
+ int i;
+ u16 tail;
+ struct sdma_desc *descp = tx->descp;
+ u8 skip = 0, mode = ahg_mode(tx);
+
+ tail = sde->descq_tail & sde->sdma_mask;
+ sde->descq[tail].qw[0] = cpu_to_le64(descp->qw[0]);
+ sde->descq[tail].qw[1] = cpu_to_le64(add_gen(sde, descp->qw[1]));
+ trace_hfi1_sdma_descriptor(sde, descp->qw[0], descp->qw[1],
+ tail, &sde->descq[tail]);
+ tail = ++sde->descq_tail & sde->sdma_mask;
+ descp++;
+ if (mode > SDMA_AHG_APPLY_UPDATE1)
+ skip = mode >> 1;
+ for (i = 1; i < tx->num_desc; i++, descp++) {
+ u64 qw1;
+
+ sde->descq[tail].qw[0] = cpu_to_le64(descp->qw[0]);
+ if (skip) {
+ /* edits don't have generation */
+ qw1 = descp->qw[1];
+ skip--;
+ } else {
+ /* replace generation with real one for non-edits */
+ qw1 = add_gen(sde, descp->qw[1]);
+ }
+ sde->descq[tail].qw[1] = cpu_to_le64(qw1);
+ trace_hfi1_sdma_descriptor(sde, descp->qw[0], qw1,
+ tail, &sde->descq[tail]);
+ tail = ++sde->descq_tail & sde->sdma_mask;
+ }
+ tx->next_descq_idx = tail;
+#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
+ tx->sn = sde->tail_sn++;
+ trace_hfi1_sdma_in_sn(sde, tx->sn);
+ WARN_ON_ONCE(sde->tx_ring[sde->tx_tail & sde->sdma_mask]);
+#endif
+ sde->tx_ring[sde->tx_tail++ & sde->sdma_mask] = tx;
+ sde->desc_avail -= tx->num_desc;
+ return tail;
+}
+
+/*
+ * Check for progress
+ */
+static int sdma_check_progress(
+ struct sdma_engine *sde,
+ struct iowait *wait,
+ struct sdma_txreq *tx)
+{
+ int ret;
+
+ sde->desc_avail = sdma_descq_freecnt(sde);
+ if (tx->num_desc <= sde->desc_avail)
+ return -EAGAIN;
+ /* pulse the head_lock */
+ if (wait && wait->sleep) {
+ unsigned seq;
+
+ seq = raw_seqcount_begin(
+ (const seqcount_t *)&sde->head_lock.seqcount);
+ ret = wait->sleep(sde, wait, tx, seq);
+ if (ret == -EAGAIN)
+ sde->desc_avail = sdma_descq_freecnt(sde);
+ } else
+ ret = -EBUSY;
+ return ret;
+}
+
+/**
+ * sdma_send_txreq() - submit a tx req to ring
+ * @sde: sdma engine to use
+ * @wait: wait structure to use when full (may be NULL)
+ * @tx: sdma_txreq to submit
+ *
+ * The call submits the tx into the ring. If a iowait structure is non-NULL
+ * the packet will be queued to the list in wait.
+ *
+ * Return:
+ * 0 - Success, -EINVAL - sdma_txreq incomplete, -EBUSY - no space in
+ * ring (wait == NULL)
+ * -EIOCBQUEUED - tx queued to iowait, -ECOMM bad sdma state
+ */
+int sdma_send_txreq(struct sdma_engine *sde,
+ struct iowait *wait,
+ struct sdma_txreq *tx)
+{
+ int ret = 0;
+ u16 tail;
+ unsigned long flags;
+
+ /* user should have supplied entire packet */
+ if (unlikely(tx->tlen))
+ return -EINVAL;
+ tx->wait = wait;
+ spin_lock_irqsave(&sde->tail_lock, flags);
+retry:
+ if (unlikely(!__sdma_running(sde)))
+ goto unlock_noconn;
+ if (unlikely(tx->num_desc > sde->desc_avail))
+ goto nodesc;
+ tail = submit_tx(sde, tx);
+ if (wait)
+ atomic_inc(&wait->sdma_busy);
+ sdma_update_tail(sde, tail);
+unlock:
+ spin_unlock_irqrestore(&sde->tail_lock, flags);
+ return ret;
+unlock_noconn:
+ if (wait)
+ atomic_inc(&wait->sdma_busy);
+ tx->next_descq_idx = 0;
+#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
+ tx->sn = sde->tail_sn++;
+ trace_hfi1_sdma_in_sn(sde, tx->sn);
+#endif
+ spin_lock(&sde->flushlist_lock);
+ list_add_tail(&tx->list, &sde->flushlist);
+ spin_unlock(&sde->flushlist_lock);
+ if (wait) {
+ wait->tx_count++;
+ wait->count += tx->num_desc;
+ }
+ schedule_work(&sde->flush_worker);
+ ret = -ECOMM;
+ goto unlock;
+nodesc:
+ ret = sdma_check_progress(sde, wait, tx);
+ if (ret == -EAGAIN) {
+ ret = 0;
+ goto retry;
+ }
+ sde->descq_full_count++;
+ goto unlock;
+}
+
+/**
+ * sdma_send_txlist() - submit a list of tx req to ring
+ * @sde: sdma engine to use
+ * @wait: wait structure to use when full (may be NULL)
+ * @tx_list: list of sdma_txreqs to submit
+ *
+ * The call submits the list into the ring.
+ *
+ * If the iowait structure is non-NULL and not equal to the iowait list
+ * the unprocessed part of the list will be appended to the list in wait.
+ *
+ * In all cases, the tx_list will be updated so the head of the tx_list is
+ * the list of descriptors that have yet to be transmitted.
+ *
+ * The intent of this call is to provide a more efficient
+ * way of submitting multiple packets to SDMA while holding the tail
+ * side locking.
+ *
+ * Return:
+ * 0 - Success, -EINVAL - sdma_txreq incomplete, -EBUSY - no space in ring
+ * (wait == NULL)
+ * -EIOCBQUEUED - tx queued to iowait, -ECOMM bad sdma state
+ */
+int sdma_send_txlist(struct sdma_engine *sde,
+ struct iowait *wait,
+ struct list_head *tx_list)
+{
+ struct sdma_txreq *tx, *tx_next;
+ int ret = 0;
+ unsigned long flags;
+ u16 tail = INVALID_TAIL;
+ int count = 0;
+
+ spin_lock_irqsave(&sde->tail_lock, flags);
+retry:
+ list_for_each_entry_safe(tx, tx_next, tx_list, list) {
+ tx->wait = wait;
+ if (unlikely(!__sdma_running(sde)))
+ goto unlock_noconn;
+ if (unlikely(tx->num_desc > sde->desc_avail))
+ goto nodesc;
+ if (unlikely(tx->tlen)) {
+ ret = -EINVAL;
+ goto update_tail;
+ }
+ list_del_init(&tx->list);
+ tail = submit_tx(sde, tx);
+ count++;
+ if (tail != INVALID_TAIL &&
+ (count & SDMA_TAIL_UPDATE_THRESH) == 0) {
+ sdma_update_tail(sde, tail);
+ tail = INVALID_TAIL;
+ }
+ }
+update_tail:
+ if (wait)
+ atomic_add(count, &wait->sdma_busy);
+ if (tail != INVALID_TAIL)
+ sdma_update_tail(sde, tail);
+ spin_unlock_irqrestore(&sde->tail_lock, flags);
+ return ret;
+unlock_noconn:
+ spin_lock(&sde->flushlist_lock);
+ list_for_each_entry_safe(tx, tx_next, tx_list, list) {
+ tx->wait = wait;
+ list_del_init(&tx->list);
+ if (wait)
+ atomic_inc(&wait->sdma_busy);
+ tx->next_descq_idx = 0;
+#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
+ tx->sn = sde->tail_sn++;
+ trace_hfi1_sdma_in_sn(sde, tx->sn);
+#endif
+ list_add_tail(&tx->list, &sde->flushlist);
+ if (wait) {
+ wait->tx_count++;
+ wait->count += tx->num_desc;
+ }
+ }
+ spin_unlock(&sde->flushlist_lock);
+ schedule_work(&sde->flush_worker);
+ ret = -ECOMM;
+ goto update_tail;
+nodesc:
+ ret = sdma_check_progress(sde, wait, tx);
+ if (ret == -EAGAIN) {
+ ret = 0;
+ goto retry;
+ }
+ sde->descq_full_count++;
+ goto update_tail;
+}
+
+static void sdma_process_event(struct sdma_engine *sde,
+ enum sdma_events event)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&sde->tail_lock, flags);
+ write_seqlock(&sde->head_lock);
+
+ __sdma_process_event(sde, event);
+
+ if (sde->state.current_state == sdma_state_s99_running)
+ sdma_desc_avail(sde, sdma_descq_freecnt(sde));
+
+ write_sequnlock(&sde->head_lock);
+ spin_unlock_irqrestore(&sde->tail_lock, flags);
+}
+
+static void __sdma_process_event(struct sdma_engine *sde,
+ enum sdma_events event)
+{
+ struct sdma_state *ss = &sde->state;
+ int need_progress = 0;
+
+ /* CONFIG SDMA temporary */
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(sde->dd, "CONFIG SDMA(%u) [%s] %s\n", sde->this_idx,
+ sdma_state_names[ss->current_state],
+ sdma_event_names[event]);
+#endif
+
+ switch (ss->current_state) {
+ case sdma_state_s00_hw_down:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ break;
+ case sdma_event_e30_go_running:
+ /*
+ * If down, but running requested (usually result
+ * of link up, then we need to start up.
+ * This can happen when hw down is requested while
+ * bringing the link up with traffic active on
+ * 7220, e.g. */
+ ss->go_s99_running = 1;
+ /* fall through and start dma engine */
+ case sdma_event_e10_go_hw_start:
+ /* This reference means the state machine is started */
+ sdma_get(&sde->state);
+ sdma_set_state(sde,
+ sdma_state_s10_hw_start_up_halt_wait);
+ break;
+ case sdma_event_e15_hw_halt_done:
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ break;
+ case sdma_event_e40_sw_cleaned:
+ sdma_sw_tear_down(sde);
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ break;
+ case sdma_event_e70_go_idle:
+ break;
+ case sdma_event_e80_hw_freeze:
+ break;
+ case sdma_event_e81_hw_frozen:
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ break;
+ case sdma_event_e85_link_down:
+ break;
+ case sdma_event_e90_sw_halted:
+ break;
+ }
+ break;
+
+ case sdma_state_s10_hw_start_up_halt_wait:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+ sdma_sw_tear_down(sde);
+ break;
+ case sdma_event_e10_go_hw_start:
+ break;
+ case sdma_event_e15_hw_halt_done:
+ sdma_set_state(sde,
+ sdma_state_s15_hw_start_up_clean_wait);
+ sdma_start_hw_clean_up(sde);
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ break;
+ case sdma_event_e30_go_running:
+ ss->go_s99_running = 1;
+ break;
+ case sdma_event_e40_sw_cleaned:
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ sdma_start_err_halt_wait(sde);
+ break;
+ case sdma_event_e70_go_idle:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e80_hw_freeze:
+ break;
+ case sdma_event_e81_hw_frozen:
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ break;
+ case sdma_event_e85_link_down:
+ break;
+ case sdma_event_e90_sw_halted:
+ break;
+ }
+ break;
+
+ case sdma_state_s15_hw_start_up_clean_wait:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+ sdma_sw_tear_down(sde);
+ break;
+ case sdma_event_e10_go_hw_start:
+ break;
+ case sdma_event_e15_hw_halt_done:
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ sdma_hw_start_up(sde);
+ sdma_set_state(sde, ss->go_s99_running ?
+ sdma_state_s99_running :
+ sdma_state_s20_idle);
+ break;
+ case sdma_event_e30_go_running:
+ ss->go_s99_running = 1;
+ break;
+ case sdma_event_e40_sw_cleaned:
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ break;
+ case sdma_event_e70_go_idle:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e80_hw_freeze:
+ break;
+ case sdma_event_e81_hw_frozen:
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ break;
+ case sdma_event_e85_link_down:
+ break;
+ case sdma_event_e90_sw_halted:
+ break;
+ }
+ break;
+
+ case sdma_state_s20_idle:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+ sdma_sw_tear_down(sde);
+ break;
+ case sdma_event_e10_go_hw_start:
+ break;
+ case sdma_event_e15_hw_halt_done:
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ break;
+ case sdma_event_e30_go_running:
+ sdma_set_state(sde, sdma_state_s99_running);
+ ss->go_s99_running = 1;
+ break;
+ case sdma_event_e40_sw_cleaned:
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ sdma_set_state(sde, sdma_state_s50_hw_halt_wait);
+ sdma_start_err_halt_wait(sde);
+ break;
+ case sdma_event_e70_go_idle:
+ break;
+ case sdma_event_e85_link_down:
+ /* fall through */
+ case sdma_event_e80_hw_freeze:
+ sdma_set_state(sde, sdma_state_s80_hw_freeze);
+ atomic_dec(&sde->dd->sdma_unfreeze_count);
+ wake_up_interruptible(&sde->dd->sdma_unfreeze_wq);
+ break;
+ case sdma_event_e81_hw_frozen:
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ break;
+ case sdma_event_e90_sw_halted:
+ break;
+ }
+ break;
+
+ case sdma_state_s30_sw_clean_up_wait:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+ break;
+ case sdma_event_e10_go_hw_start:
+ break;
+ case sdma_event_e15_hw_halt_done:
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ break;
+ case sdma_event_e30_go_running:
+ ss->go_s99_running = 1;
+ break;
+ case sdma_event_e40_sw_cleaned:
+ sdma_set_state(sde, sdma_state_s40_hw_clean_up_wait);
+ sdma_start_hw_clean_up(sde);
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ break;
+ case sdma_event_e70_go_idle:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e80_hw_freeze:
+ break;
+ case sdma_event_e81_hw_frozen:
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ break;
+ case sdma_event_e85_link_down:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e90_sw_halted:
+ break;
+ }
+ break;
+
+ case sdma_state_s40_hw_clean_up_wait:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+ sdma_start_sw_clean_up(sde);
+ break;
+ case sdma_event_e10_go_hw_start:
+ break;
+ case sdma_event_e15_hw_halt_done:
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ sdma_hw_start_up(sde);
+ sdma_set_state(sde, ss->go_s99_running ?
+ sdma_state_s99_running :
+ sdma_state_s20_idle);
+ break;
+ case sdma_event_e30_go_running:
+ ss->go_s99_running = 1;
+ break;
+ case sdma_event_e40_sw_cleaned:
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ break;
+ case sdma_event_e70_go_idle:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e80_hw_freeze:
+ break;
+ case sdma_event_e81_hw_frozen:
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ break;
+ case sdma_event_e85_link_down:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e90_sw_halted:
+ break;
+ }
+ break;
+
+ case sdma_state_s50_hw_halt_wait:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+ sdma_start_sw_clean_up(sde);
+ break;
+ case sdma_event_e10_go_hw_start:
+ break;
+ case sdma_event_e15_hw_halt_done:
+ sdma_set_state(sde, sdma_state_s30_sw_clean_up_wait);
+ sdma_start_sw_clean_up(sde);
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ break;
+ case sdma_event_e30_go_running:
+ ss->go_s99_running = 1;
+ break;
+ case sdma_event_e40_sw_cleaned:
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ sdma_start_err_halt_wait(sde);
+ break;
+ case sdma_event_e70_go_idle:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e80_hw_freeze:
+ break;
+ case sdma_event_e81_hw_frozen:
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ break;
+ case sdma_event_e85_link_down:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e90_sw_halted:
+ break;
+ }
+ break;
+
+ case sdma_state_s60_idle_halt_wait:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+ sdma_start_sw_clean_up(sde);
+ break;
+ case sdma_event_e10_go_hw_start:
+ break;
+ case sdma_event_e15_hw_halt_done:
+ sdma_set_state(sde, sdma_state_s30_sw_clean_up_wait);
+ sdma_start_sw_clean_up(sde);
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ break;
+ case sdma_event_e30_go_running:
+ ss->go_s99_running = 1;
+ break;
+ case sdma_event_e40_sw_cleaned:
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ sdma_start_err_halt_wait(sde);
+ break;
+ case sdma_event_e70_go_idle:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e80_hw_freeze:
+ break;
+ case sdma_event_e81_hw_frozen:
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ break;
+ case sdma_event_e85_link_down:
+ break;
+ case sdma_event_e90_sw_halted:
+ break;
+ }
+ break;
+
+ case sdma_state_s80_hw_freeze:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+ sdma_start_sw_clean_up(sde);
+ break;
+ case sdma_event_e10_go_hw_start:
+ break;
+ case sdma_event_e15_hw_halt_done:
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ break;
+ case sdma_event_e30_go_running:
+ ss->go_s99_running = 1;
+ break;
+ case sdma_event_e40_sw_cleaned:
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ break;
+ case sdma_event_e70_go_idle:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e80_hw_freeze:
+ break;
+ case sdma_event_e81_hw_frozen:
+ sdma_set_state(sde, sdma_state_s82_freeze_sw_clean);
+ sdma_start_sw_clean_up(sde);
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ break;
+ case sdma_event_e85_link_down:
+ break;
+ case sdma_event_e90_sw_halted:
+ break;
+ }
+ break;
+
+ case sdma_state_s82_freeze_sw_clean:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+ sdma_start_sw_clean_up(sde);
+ break;
+ case sdma_event_e10_go_hw_start:
+ break;
+ case sdma_event_e15_hw_halt_done:
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ break;
+ case sdma_event_e30_go_running:
+ ss->go_s99_running = 1;
+ break;
+ case sdma_event_e40_sw_cleaned:
+ /* notify caller this engine is done cleaning */
+ atomic_dec(&sde->dd->sdma_unfreeze_count);
+ wake_up_interruptible(&sde->dd->sdma_unfreeze_wq);
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ break;
+ case sdma_event_e70_go_idle:
+ ss->go_s99_running = 0;
+ break;
+ case sdma_event_e80_hw_freeze:
+ break;
+ case sdma_event_e81_hw_frozen:
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ sdma_hw_start_up(sde);
+ sdma_set_state(sde, ss->go_s99_running ?
+ sdma_state_s99_running :
+ sdma_state_s20_idle);
+ break;
+ case sdma_event_e85_link_down:
+ break;
+ case sdma_event_e90_sw_halted:
+ break;
+ }
+ break;
+
+ case sdma_state_s99_running:
+ switch (event) {
+ case sdma_event_e00_go_hw_down:
+ sdma_set_state(sde, sdma_state_s00_hw_down);
+ sdma_start_sw_clean_up(sde);
+ break;
+ case sdma_event_e10_go_hw_start:
+ break;
+ case sdma_event_e15_hw_halt_done:
+ break;
+ case sdma_event_e25_hw_clean_up_done:
+ break;
+ case sdma_event_e30_go_running:
+ break;
+ case sdma_event_e40_sw_cleaned:
+ break;
+ case sdma_event_e50_hw_cleaned:
+ break;
+ case sdma_event_e60_hw_halted:
+ need_progress = 1;
+ sdma_err_progress_check_schedule(sde);
+ case sdma_event_e90_sw_halted:
+ /*
+ * SW initiated halt does not perform engines
+ * progress check
+ */
+ sdma_set_state(sde, sdma_state_s50_hw_halt_wait);
+ sdma_start_err_halt_wait(sde);
+ break;
+ case sdma_event_e70_go_idle:
+ sdma_set_state(sde, sdma_state_s60_idle_halt_wait);
+ break;
+ case sdma_event_e85_link_down:
+ ss->go_s99_running = 0;
+ /* fall through */
+ case sdma_event_e80_hw_freeze:
+ sdma_set_state(sde, sdma_state_s80_hw_freeze);
+ atomic_dec(&sde->dd->sdma_unfreeze_count);
+ wake_up_interruptible(&sde->dd->sdma_unfreeze_wq);
+ break;
+ case sdma_event_e81_hw_frozen:
+ break;
+ case sdma_event_e82_hw_unfreeze:
+ break;
+ }
+ break;
+ }
+
+ ss->last_event = event;
+ if (need_progress)
+ sdma_make_progress(sde, 0);
+}
+
+/*
+ * _extend_sdma_tx_descs() - helper to extend txreq
+ *
+ * This is called once the initial nominal allocation
+ * of descriptors in the sdma_txreq is exhausted.
+ *
+ * The code will bump the allocation up to the max
+ * of MAX_DESC (64) descriptors. There doesn't seem
+ * much point in an interim step.
+ *
+ */
+int _extend_sdma_tx_descs(struct hfi1_devdata *dd, struct sdma_txreq *tx)
+{
+ int i;
+
+ tx->descp = kmalloc_array(
+ MAX_DESC,
+ sizeof(struct sdma_desc),
+ GFP_ATOMIC);
+ if (!tx->descp)
+ return -ENOMEM;
+ tx->desc_limit = MAX_DESC;
+ /* copy ones already built */
+ for (i = 0; i < tx->num_desc; i++)
+ tx->descp[i] = tx->descs[i];
+ return 0;
+}
+
+/* Update sdes when the lmc changes */
+void sdma_update_lmc(struct hfi1_devdata *dd, u64 mask, u32 lid)
+{
+ struct sdma_engine *sde;
+ int i;
+ u64 sreg;
+
+ sreg = ((mask & SD(CHECK_SLID_MASK_MASK)) <<
+ SD(CHECK_SLID_MASK_SHIFT)) |
+ (((lid & mask) & SD(CHECK_SLID_VALUE_MASK)) <<
+ SD(CHECK_SLID_VALUE_SHIFT));
+
+ for (i = 0; i < dd->num_sdma; i++) {
+ hfi1_cdbg(LINKVERB, "SendDmaEngine[%d].SLID_CHECK = 0x%x",
+ i, (u32)sreg);
+ sde = &dd->per_sdma[i];
+ write_sde_csr(sde, SD(CHECK_SLID), sreg);
+ }
+}
+
+/* tx not dword sized - pad */
+int _pad_sdma_tx_descs(struct hfi1_devdata *dd, struct sdma_txreq *tx)
+{
+ int rval = 0;
+
+ if ((unlikely(tx->num_desc == tx->desc_limit))) {
+ rval = _extend_sdma_tx_descs(dd, tx);
+ if (rval)
+ return rval;
+ }
+ /* finish the one just added */
+ tx->num_desc++;
+ make_tx_sdma_desc(
+ tx,
+ SDMA_MAP_NONE,
+ dd->sdma_pad_phys,
+ sizeof(u32) - (tx->packet_len & (sizeof(u32) - 1)));
+ _sdma_close_tx(dd, tx);
+ return rval;
+}
+
+/*
+ * Add ahg to the sdma_txreq
+ *
+ * The logic will consume up to 3
+ * descriptors at the beginning of
+ * sdma_txreq.
+ */
+void _sdma_txreq_ahgadd(
+ struct sdma_txreq *tx,
+ u8 num_ahg,
+ u8 ahg_entry,
+ u32 *ahg,
+ u8 ahg_hlen)
+{
+ u32 i, shift = 0, desc = 0;
+ u8 mode;
+
+ WARN_ON_ONCE(num_ahg > 9 || (ahg_hlen & 3) || ahg_hlen == 4);
+ /* compute mode */
+ if (num_ahg == 1)
+ mode = SDMA_AHG_APPLY_UPDATE1;
+ else if (num_ahg <= 5)
+ mode = SDMA_AHG_APPLY_UPDATE2;
+ else
+ mode = SDMA_AHG_APPLY_UPDATE3;
+ tx->num_desc++;
+ /* initialize to consumed descriptors to zero */
+ switch (mode) {
+ case SDMA_AHG_APPLY_UPDATE3:
+ tx->num_desc++;
+ tx->descs[2].qw[0] = 0;
+ tx->descs[2].qw[1] = 0;
+ /* FALLTHROUGH */
+ case SDMA_AHG_APPLY_UPDATE2:
+ tx->num_desc++;
+ tx->descs[1].qw[0] = 0;
+ tx->descs[1].qw[1] = 0;
+ break;
+ }
+ ahg_hlen >>= 2;
+ tx->descs[0].qw[1] |=
+ (((u64)ahg_entry & SDMA_DESC1_HEADER_INDEX_MASK)
+ << SDMA_DESC1_HEADER_INDEX_SHIFT) |
+ (((u64)ahg_hlen & SDMA_DESC1_HEADER_DWS_MASK)
+ << SDMA_DESC1_HEADER_DWS_SHIFT) |
+ (((u64)mode & SDMA_DESC1_HEADER_MODE_MASK)
+ << SDMA_DESC1_HEADER_MODE_SHIFT) |
+ (((u64)ahg[0] & SDMA_DESC1_HEADER_UPDATE1_MASK)
+ << SDMA_DESC1_HEADER_UPDATE1_SHIFT);
+ for (i = 0; i < (num_ahg - 1); i++) {
+ if (!shift && !(i & 2))
+ desc++;
+ tx->descs[desc].qw[!!(i & 2)] |=
+ (((u64)ahg[i + 1])
+ << shift);
+ shift = (shift + 32) & 63;
+ }
+}
+
+/**
+ * sdma_ahg_alloc - allocate an AHG entry
+ * @sde: engine to allocate from
+ *
+ * Return:
+ * 0-31 when successful, -EOPNOTSUPP if AHG is not enabled,
+ * -ENOSPC if an entry is not available
+ */
+int sdma_ahg_alloc(struct sdma_engine *sde)
+{
+ int nr;
+ int oldbit;
+
+ if (!sde) {
+ trace_hfi1_ahg_allocate(sde, -EINVAL);
+ return -EINVAL;
+ }
+ while (1) {
+ nr = ffz(ACCESS_ONCE(sde->ahg_bits));
+ if (nr > 31) {
+ trace_hfi1_ahg_allocate(sde, -ENOSPC);
+ return -ENOSPC;
+ }
+ oldbit = test_and_set_bit(nr, &sde->ahg_bits);
+ if (!oldbit)
+ break;
+ cpu_relax();
+ }
+ trace_hfi1_ahg_allocate(sde, nr);
+ return nr;
+}
+
+/**
+ * sdma_ahg_free - free an AHG entry
+ * @sde: engine to return AHG entry
+ * @ahg_index: index to free
+ *
+ * This routine frees the indicate AHG entry.
+ */
+void sdma_ahg_free(struct sdma_engine *sde, int ahg_index)
+{
+ if (!sde)
+ return;
+ trace_hfi1_ahg_deallocate(sde, ahg_index);
+ if (ahg_index < 0 || ahg_index > 31)
+ return;
+ clear_bit(ahg_index, &sde->ahg_bits);
+}
+
+/*
+ * SPC freeze handling for SDMA engines. Called when the driver knows
+ * the SPC is going into a freeze but before the freeze is fully
+ * settled. Generally an error interrupt.
+ *
+ * This event will pull the engine out of running so no more entries can be
+ * added to the engine's queue.
+ */
+void sdma_freeze_notify(struct hfi1_devdata *dd, int link_down)
+{
+ int i;
+ enum sdma_events event = link_down ? sdma_event_e85_link_down :
+ sdma_event_e80_hw_freeze;
+
+ /* set up the wait but do not wait here */
+ atomic_set(&dd->sdma_unfreeze_count, dd->num_sdma);
+
+ /* tell all engines to stop running and wait */
+ for (i = 0; i < dd->num_sdma; i++)
+ sdma_process_event(&dd->per_sdma[i], event);
+
+ /* sdma_freeze() will wait for all engines to have stopped */
+}
+
+/*
+ * SPC freeze handling for SDMA engines. Called when the driver knows
+ * the SPC is fully frozen.
+ */
+void sdma_freeze(struct hfi1_devdata *dd)
+{
+ int i;
+ int ret;
+
+ /*
+ * Make sure all engines have moved out of the running state before
+ * continuing.
+ */
+ ret = wait_event_interruptible(dd->sdma_unfreeze_wq,
+ atomic_read(&dd->sdma_unfreeze_count) <= 0);
+ /* interrupted or count is negative, then unloading - just exit */
+ if (ret || atomic_read(&dd->sdma_unfreeze_count) < 0)
+ return;
+
+ /* set up the count for the next wait */
+ atomic_set(&dd->sdma_unfreeze_count, dd->num_sdma);
+
+ /* tell all engines that the SPC is frozen, they can start cleaning */
+ for (i = 0; i < dd->num_sdma; i++)
+ sdma_process_event(&dd->per_sdma[i], sdma_event_e81_hw_frozen);
+
+ /*
+ * Wait for everyone to finish software clean before exiting. The
+ * software clean will read engine CSRs, so must be completed before
+ * the next step, which will clear the engine CSRs.
+ */
+ (void) wait_event_interruptible(dd->sdma_unfreeze_wq,
+ atomic_read(&dd->sdma_unfreeze_count) <= 0);
+ /* no need to check results - done no matter what */
+}
+
+/*
+ * SPC freeze handling for the SDMA engines. Called after the SPC is unfrozen.
+ *
+ * The SPC freeze acts like a SDMA halt and a hardware clean combined. All
+ * that is left is a software clean. We could do it after the SPC is fully
+ * frozen, but then we'd have to add another state to wait for the unfreeze.
+ * Instead, just defer the software clean until the unfreeze step.
+ */
+void sdma_unfreeze(struct hfi1_devdata *dd)
+{
+ int i;
+
+ /* tell all engines start freeze clean up */
+ for (i = 0; i < dd->num_sdma; i++)
+ sdma_process_event(&dd->per_sdma[i],
+ sdma_event_e82_hw_unfreeze);
+}
+
+/**
+ * _sdma_engine_progress_schedule() - schedule progress on engine
+ * @sde: sdma_engine to schedule progress
+ *
+ */
+void _sdma_engine_progress_schedule(
+ struct sdma_engine *sde)
+{
+ trace_hfi1_sdma_engine_progress(sde, sde->progress_mask);
+ /* assume we have selected a good cpu */
+ write_csr(sde->dd,
+ CCE_INT_FORCE + (8*(IS_SDMA_START/64)), sde->progress_mask);
+}
diff --git a/drivers/staging/rdma/hfi1/sdma.h b/drivers/staging/rdma/hfi1/sdma.h
new file mode 100644
index 0000000..1e613fc
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/sdma.h
@@ -0,0 +1,1123 @@
+#ifndef _HFI1_SDMA_H
+#define _HFI1_SDMA_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <asm/byteorder.h>
+#include <linux/workqueue.h>
+#include <linux/rculist.h>
+
+#include "hfi.h"
+#include "verbs.h"
+
+/* increased for AHG */
+#define NUM_DESC 6
+/* Hardware limit */
+#define MAX_DESC 64
+/* Hardware limit for SDMA packet size */
+#define MAX_SDMA_PKT_SIZE ((16 * 1024) - 1)
+
+
+#define SDMA_TXREQ_S_OK 0
+#define SDMA_TXREQ_S_SENDERROR 1
+#define SDMA_TXREQ_S_ABORTED 2
+#define SDMA_TXREQ_S_SHUTDOWN 3
+
+/* flags bits */
+#define SDMA_TXREQ_F_URGENT 0x0001
+#define SDMA_TXREQ_F_AHG_COPY 0x0002
+#define SDMA_TXREQ_F_USE_AHG 0x0004
+
+#define SDMA_MAP_NONE 0
+#define SDMA_MAP_SINGLE 1
+#define SDMA_MAP_PAGE 2
+
+#define SDMA_AHG_VALUE_MASK 0xffff
+#define SDMA_AHG_VALUE_SHIFT 0
+#define SDMA_AHG_INDEX_MASK 0xf
+#define SDMA_AHG_INDEX_SHIFT 16
+#define SDMA_AHG_FIELD_LEN_MASK 0xf
+#define SDMA_AHG_FIELD_LEN_SHIFT 20
+#define SDMA_AHG_FIELD_START_MASK 0x1f
+#define SDMA_AHG_FIELD_START_SHIFT 24
+#define SDMA_AHG_UPDATE_ENABLE_MASK 0x1
+#define SDMA_AHG_UPDATE_ENABLE_SHIFT 31
+
+/* AHG modes */
+
+/*
+ * Be aware the ordering and values
+ * for SDMA_AHG_APPLY_UPDATE[123]
+ * are assumed in generating a skip
+ * count in submit_tx() in sdma.c
+ */
+#define SDMA_AHG_NO_AHG 0
+#define SDMA_AHG_COPY 1
+#define SDMA_AHG_APPLY_UPDATE1 2
+#define SDMA_AHG_APPLY_UPDATE2 3
+#define SDMA_AHG_APPLY_UPDATE3 4
+
+/*
+ * Bits defined in the send DMA descriptor.
+ */
+#define SDMA_DESC0_FIRST_DESC_FLAG (1ULL<<63)
+#define SDMA_DESC0_LAST_DESC_FLAG (1ULL<<62)
+#define SDMA_DESC0_BYTE_COUNT_SHIFT 48
+#define SDMA_DESC0_BYTE_COUNT_WIDTH 14
+#define SDMA_DESC0_BYTE_COUNT_MASK \
+ ((1ULL<<SDMA_DESC0_BYTE_COUNT_WIDTH)-1ULL)
+#define SDMA_DESC0_BYTE_COUNT_SMASK \
+ (SDMA_DESC0_BYTE_COUNT_MASK<<SDMA_DESC0_BYTE_COUNT_SHIFT)
+#define SDMA_DESC0_PHY_ADDR_SHIFT 0
+#define SDMA_DESC0_PHY_ADDR_WIDTH 48
+#define SDMA_DESC0_PHY_ADDR_MASK \
+ ((1ULL<<SDMA_DESC0_PHY_ADDR_WIDTH)-1ULL)
+#define SDMA_DESC0_PHY_ADDR_SMASK \
+ (SDMA_DESC0_PHY_ADDR_MASK<<SDMA_DESC0_PHY_ADDR_SHIFT)
+
+#define SDMA_DESC1_HEADER_UPDATE1_SHIFT 32
+#define SDMA_DESC1_HEADER_UPDATE1_WIDTH 32
+#define SDMA_DESC1_HEADER_UPDATE1_MASK \
+ ((1ULL<<SDMA_DESC1_HEADER_UPDATE1_WIDTH)-1ULL)
+#define SDMA_DESC1_HEADER_UPDATE1_SMASK \
+ (SDMA_DESC1_HEADER_UPDATE1_MASK<<SDMA_DESC1_HEADER_UPDATE1_SHIFT)
+#define SDMA_DESC1_HEADER_MODE_SHIFT 13
+#define SDMA_DESC1_HEADER_MODE_WIDTH 3
+#define SDMA_DESC1_HEADER_MODE_MASK \
+ ((1ULL<<SDMA_DESC1_HEADER_MODE_WIDTH)-1ULL)
+#define SDMA_DESC1_HEADER_MODE_SMASK \
+ (SDMA_DESC1_HEADER_MODE_MASK<<SDMA_DESC1_HEADER_MODE_SHIFT)
+#define SDMA_DESC1_HEADER_INDEX_SHIFT 8
+#define SDMA_DESC1_HEADER_INDEX_WIDTH 5
+#define SDMA_DESC1_HEADER_INDEX_MASK \
+ ((1ULL<<SDMA_DESC1_HEADER_INDEX_WIDTH)-1ULL)
+#define SDMA_DESC1_HEADER_INDEX_SMASK \
+ (SDMA_DESC1_HEADER_INDEX_MASK<<SDMA_DESC1_HEADER_INDEX_SHIFT)
+#define SDMA_DESC1_HEADER_DWS_SHIFT 4
+#define SDMA_DESC1_HEADER_DWS_WIDTH 4
+#define SDMA_DESC1_HEADER_DWS_MASK \
+ ((1ULL<<SDMA_DESC1_HEADER_DWS_WIDTH)-1ULL)
+#define SDMA_DESC1_HEADER_DWS_SMASK \
+ (SDMA_DESC1_HEADER_DWS_MASK<<SDMA_DESC1_HEADER_DWS_SHIFT)
+#define SDMA_DESC1_GENERATION_SHIFT 2
+#define SDMA_DESC1_GENERATION_WIDTH 2
+#define SDMA_DESC1_GENERATION_MASK \
+ ((1ULL<<SDMA_DESC1_GENERATION_WIDTH)-1ULL)
+#define SDMA_DESC1_GENERATION_SMASK \
+ (SDMA_DESC1_GENERATION_MASK<<SDMA_DESC1_GENERATION_SHIFT)
+#define SDMA_DESC1_INT_REQ_FLAG (1ULL<<1)
+#define SDMA_DESC1_HEAD_TO_HOST_FLAG (1ULL<<0)
+
+enum sdma_states {
+ sdma_state_s00_hw_down,
+ sdma_state_s10_hw_start_up_halt_wait,
+ sdma_state_s15_hw_start_up_clean_wait,
+ sdma_state_s20_idle,
+ sdma_state_s30_sw_clean_up_wait,
+ sdma_state_s40_hw_clean_up_wait,
+ sdma_state_s50_hw_halt_wait,
+ sdma_state_s60_idle_halt_wait,
+ sdma_state_s80_hw_freeze,
+ sdma_state_s82_freeze_sw_clean,
+ sdma_state_s99_running,
+};
+
+enum sdma_events {
+ sdma_event_e00_go_hw_down,
+ sdma_event_e10_go_hw_start,
+ sdma_event_e15_hw_halt_done,
+ sdma_event_e25_hw_clean_up_done,
+ sdma_event_e30_go_running,
+ sdma_event_e40_sw_cleaned,
+ sdma_event_e50_hw_cleaned,
+ sdma_event_e60_hw_halted,
+ sdma_event_e70_go_idle,
+ sdma_event_e80_hw_freeze,
+ sdma_event_e81_hw_frozen,
+ sdma_event_e82_hw_unfreeze,
+ sdma_event_e85_link_down,
+ sdma_event_e90_sw_halted,
+};
+
+struct sdma_set_state_action {
+ unsigned op_enable:1;
+ unsigned op_intenable:1;
+ unsigned op_halt:1;
+ unsigned op_cleanup:1;
+ unsigned go_s99_running_tofalse:1;
+ unsigned go_s99_running_totrue:1;
+};
+
+struct sdma_state {
+ struct kref kref;
+ struct completion comp;
+ enum sdma_states current_state;
+ unsigned current_op;
+ unsigned go_s99_running;
+ /* debugging/development */
+ enum sdma_states previous_state;
+ unsigned previous_op;
+ enum sdma_events last_event;
+};
+
+/**
+ * DOC: sdma exported routines
+ *
+ * These sdma routines fit into three categories:
+ * - The SDMA API for building and submitting packets
+ * to the ring
+ *
+ * - Initialization and tear down routines to buildup
+ * and tear down SDMA
+ *
+ * - ISR entrances to handle interrupts, state changes
+ * and errors
+ */
+
+/**
+ * DOC: sdma PSM/verbs API
+ *
+ * The sdma API is designed to be used by both PSM
+ * and verbs to supply packets to the SDMA ring.
+ *
+ * The usage of the API is as follows:
+ *
+ * Embed a struct iowait in the QP or
+ * PQ. The iowait should be initialized with a
+ * call to iowait_init().
+ *
+ * The user of the API should create an allocation method
+ * for their version of the txreq. slabs, pre-allocated lists,
+ * and dma pools can be used. Once the user's overload of
+ * the sdma_txreq has been allocated, the sdma_txreq member
+ * must be initialized with sdma_txinit() or sdma_txinit_ahg().
+ *
+ * The txreq must be declared with the sdma_txreq first.
+ *
+ * The tx request, once initialized, is manipulated with calls to
+ * sdma_txadd_daddr(), sdma_txadd_page(), or sdma_txadd_kvaddr()
+ * for each disjoint memory location. It is the user's responsibility
+ * to understand the packet boundaries and page boundaries to do the
+ * appropriate number of sdma_txadd_* calls.. The user
+ * must be prepared to deal with failures from these routines due to
+ * either memory allocation or dma_mapping failures.
+ *
+ * The mapping specifics for each memory location are recorded
+ * in the tx. Memory locations added with sdma_txadd_page()
+ * and sdma_txadd_kvaddr() are automatically mapped when added
+ * to the tx and nmapped as part of the progress processing in the
+ * SDMA interrupt handling.
+ *
+ * sdma_txadd_daddr() is used to add an dma_addr_t memory to the
+ * tx. An example of a use case would be a pre-allocated
+ * set of headers allocated via dma_pool_alloc() or
+ * dma_alloc_coherent(). For these memory locations, it
+ * is the responsibility of the user to handle that unmapping.
+ * (This would usually be at an unload or job termination.)
+ *
+ * The routine sdma_send_txreq() is used to submit
+ * a tx to the ring after the appropriate number of
+ * sdma_txadd_* have been done.
+ *
+ * If it is desired to send a burst of sdma_txreqs, sdma_send_txlist()
+ * can be used to submit a list of packets.
+ *
+ * The user is free to use the link overhead in the struct sdma_txreq as
+ * long as the tx isn't in flight.
+ *
+ * The extreme degenerate case of the number of descriptors
+ * exceeding the ring size is automatically handled as
+ * memory locations are added. An overflow of the descriptor
+ * array that is part of the sdma_txreq is also automatically
+ * handled.
+ *
+ */
+
+/**
+ * DOC: Infrastructure calls
+ *
+ * sdma_init() is used to initialize data structures and
+ * CSRs for the desired number of SDMA engines.
+ *
+ * sdma_start() is used to kick the SDMA engines initialized
+ * with sdma_init(). Interrupts must be enabled at this
+ * point since aspects of the state machine are interrupt
+ * driven.
+ *
+ * sdma_engine_error() and sdma_engine_interrupt() are
+ * entrances for interrupts.
+ *
+ * sdma_map_init() is for the management of the mapping
+ * table when the number of vls is changed.
+ *
+ */
+
+/*
+ * struct hw_sdma_desc - raw 128 bit SDMA descriptor
+ *
+ * This is the raw descriptor in the SDMA ring
+ */
+struct hw_sdma_desc {
+ /* private: don't use directly */
+ __le64 qw[2];
+};
+
+/*
+ * struct sdma_desc - canonical fragment descriptor
+ *
+ * This is the descriptor carried in the tx request
+ * corresponding to each fragment.
+ *
+ */
+struct sdma_desc {
+ /* private: don't use directly */
+ u64 qw[2];
+};
+
+struct sdma_txreq;
+typedef void (*callback_t)(struct sdma_txreq *, int, int);
+
+/**
+ * struct sdma_txreq - the sdma_txreq structure (one per packet)
+ * @list: for use by user and by queuing for wait
+ *
+ * This is the representation of a packet which consists of some
+ * number of fragments. Storage is provided to within the structure.
+ * for all fragments.
+ *
+ * The storage for the descriptors are automatically extended as needed
+ * when the currently allocation is exceeded.
+ *
+ * The user (Verbs or PSM) may overload this structure with fields
+ * specific to their use by putting this struct first in their struct.
+ * The method of allocation of the overloaded structure is user dependent
+ *
+ * The list is the only public field in the structure.
+ *
+ */
+
+struct sdma_txreq {
+ struct list_head list;
+ /* private: */
+ struct sdma_desc *descp;
+ /* private: */
+ void *coalesce_buf;
+ /* private: */
+ struct iowait *wait;
+ /* private: */
+ callback_t complete;
+#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
+ u64 sn;
+#endif
+ /* private: - used in coalesce/pad processing */
+ u16 packet_len;
+ /* private: - down-counted to trigger last */
+ u16 tlen;
+ /* private: flags */
+ u16 flags;
+ /* private: */
+ u16 num_desc;
+ /* private: */
+ u16 desc_limit;
+ /* private: */
+ u16 next_descq_idx;
+ /* private: */
+ struct sdma_desc descs[NUM_DESC];
+};
+
+struct verbs_txreq {
+ struct hfi1_pio_header phdr;
+ struct sdma_txreq txreq;
+ struct hfi1_qp *qp;
+ struct hfi1_swqe *wqe;
+ struct hfi1_mregion *mr;
+ struct hfi1_sge_state *ss;
+ struct sdma_engine *sde;
+ u16 hdr_dwords;
+ u16 hdr_inx;
+};
+
+/**
+ * struct sdma_engine - Data pertaining to each SDMA engine.
+ * @dd: a back-pointer to the device data
+ * @ppd: per port back-pointer
+ * @imask: mask for irq manipulation
+ * @idle_mask: mask for determining if an interrupt is due to sdma_idle
+ *
+ * This structure has the state for each sdma_engine.
+ *
+ * Accessing to non public fields are not supported
+ * since the private members are subject to change.
+ */
+struct sdma_engine {
+ /* read mostly */
+ struct hfi1_devdata *dd;
+ struct hfi1_pportdata *ppd;
+ /* private: */
+ void __iomem *tail_csr;
+ u64 imask; /* clear interrupt mask */
+ u64 idle_mask;
+ u64 progress_mask;
+ /* private: */
+ struct workqueue_struct *wq;
+ /* private: */
+ volatile __le64 *head_dma; /* DMA'ed by chip */
+ /* private: */
+ dma_addr_t head_phys;
+ /* private: */
+ struct hw_sdma_desc *descq;
+ /* private: */
+ unsigned descq_full_count;
+ struct sdma_txreq **tx_ring;
+ /* private: */
+ dma_addr_t descq_phys;
+ /* private */
+ u32 sdma_mask;
+ /* private */
+ struct sdma_state state;
+ /* private: */
+ u8 sdma_shift;
+ /* private: */
+ u8 this_idx; /* zero relative engine */
+ /* protect changes to senddmactrl shadow */
+ spinlock_t senddmactrl_lock;
+ /* private: */
+ u64 p_senddmactrl; /* shadow per-engine SendDmaCtrl */
+
+ /* read/write using tail_lock */
+ spinlock_t tail_lock ____cacheline_aligned_in_smp;
+#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
+ /* private: */
+ u64 tail_sn;
+#endif
+ /* private: */
+ u32 descq_tail;
+ /* private: */
+ unsigned long ahg_bits;
+ /* private: */
+ u16 desc_avail;
+ /* private: */
+ u16 tx_tail;
+ /* private: */
+ u16 descq_cnt;
+
+ /* read/write using head_lock */
+ /* private: */
+ seqlock_t head_lock ____cacheline_aligned_in_smp;
+#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
+ /* private: */
+ u64 head_sn;
+#endif
+ /* private: */
+ u32 descq_head;
+ /* private: */
+ u16 tx_head;
+ /* private: */
+ u64 last_status;
+
+ /* private: */
+ struct list_head dmawait;
+
+ /* CONFIG SDMA for now, just blindly duplicate */
+ /* private: */
+ struct tasklet_struct sdma_hw_clean_up_task
+ ____cacheline_aligned_in_smp;
+
+ /* private: */
+ struct tasklet_struct sdma_sw_clean_up_task
+ ____cacheline_aligned_in_smp;
+ /* private: */
+ struct work_struct err_halt_worker;
+ /* private */
+ struct timer_list err_progress_check_timer;
+ u32 progress_check_head;
+ /* private: */
+ struct work_struct flush_worker;
+ spinlock_t flushlist_lock;
+ /* private: */
+ struct list_head flushlist;
+};
+
+
+int sdma_init(struct hfi1_devdata *dd, u8 port);
+void sdma_start(struct hfi1_devdata *dd);
+void sdma_exit(struct hfi1_devdata *dd);
+void sdma_all_running(struct hfi1_devdata *dd);
+void sdma_all_idle(struct hfi1_devdata *dd);
+void sdma_freeze_notify(struct hfi1_devdata *dd, int go_idle);
+void sdma_freeze(struct hfi1_devdata *dd);
+void sdma_unfreeze(struct hfi1_devdata *dd);
+void sdma_wait(struct hfi1_devdata *dd);
+
+/**
+ * sdma_empty() - idle engine test
+ * @engine: sdma engine
+ *
+ * Currently used by verbs as a latency optimization.
+ *
+ * Return:
+ * 1 - empty, 0 - non-empty
+ */
+static inline int sdma_empty(struct sdma_engine *sde)
+{
+ return sde->descq_tail == sde->descq_head;
+}
+
+static inline u16 sdma_descq_freecnt(struct sdma_engine *sde)
+{
+ return sde->descq_cnt -
+ (sde->descq_tail -
+ ACCESS_ONCE(sde->descq_head)) - 1;
+}
+
+static inline u16 sdma_descq_inprocess(struct sdma_engine *sde)
+{
+ return sde->descq_cnt - sdma_descq_freecnt(sde);
+}
+
+/*
+ * Either head_lock or tail lock required to see
+ * a steady state.
+ */
+static inline int __sdma_running(struct sdma_engine *engine)
+{
+ return engine->state.current_state == sdma_state_s99_running;
+}
+
+
+/**
+ * sdma_running() - state suitability test
+ * @engine: sdma engine
+ *
+ * sdma_running probes the internal state to determine if it is suitable
+ * for submitting packets.
+ *
+ * Return:
+ * 1 - ok to submit, 0 - not ok to submit
+ *
+ */
+static inline int sdma_running(struct sdma_engine *engine)
+{
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&engine->tail_lock, flags);
+ ret = __sdma_running(engine);
+ spin_unlock_irqrestore(&engine->tail_lock, flags);
+ return ret;
+}
+
+void _sdma_txreq_ahgadd(
+ struct sdma_txreq *tx,
+ u8 num_ahg,
+ u8 ahg_entry,
+ u32 *ahg,
+ u8 ahg_hlen);
+
+
+/**
+ * sdma_txinit_ahg() - initialize an sdma_txreq struct with AHG
+ * @tx: tx request to initialize
+ * @flags: flags to key last descriptor additions
+ * @tlen: total packet length (pbc + headers + data)
+ * @ahg_entry: ahg entry to use (0 - 31)
+ * @num_ahg: ahg descriptor for first descriptor (0 - 9)
+ * @ahg: array of AHG descriptors (up to 9 entries)
+ * @ahg_hlen: number of bytes from ASIC entry to use
+ * @cb: callback
+ *
+ * The allocation of the sdma_txreq and it enclosing structure is user
+ * dependent. This routine must be called to initialize the user independent
+ * fields.
+ *
+ * The currently supported flags are SDMA_TXREQ_F_URGENT,
+ * SDMA_TXREQ_F_AHG_COPY, and SDMA_TXREQ_F_USE_AHG.
+ *
+ * SDMA_TXREQ_F_URGENT is used for latency sensitive situations where the
+ * completion is desired as soon as possible.
+ *
+ * SDMA_TXREQ_F_AHG_COPY causes the header in the first descriptor to be
+ * copied to chip entry. SDMA_TXREQ_F_USE_AHG causes the code to add in
+ * the AHG descriptors into the first 1 to 3 descriptors.
+ *
+ * Completions of submitted requests can be gotten on selected
+ * txreqs by giving a completion routine callback to sdma_txinit() or
+ * sdma_txinit_ahg(). The environment in which the callback runs
+ * can be from an ISR, a tasklet, or a thread, so no sleeping
+ * kernel routines can be used. Aspects of the sdma ring may
+ * be locked so care should be taken with locking.
+ *
+ * The callback pointer can be NULL to avoid any callback for the packet
+ * being submitted. The callback will be provided this tx, a status, and a flag.
+ *
+ * The status will be one of SDMA_TXREQ_S_OK, SDMA_TXREQ_S_SENDERROR,
+ * SDMA_TXREQ_S_ABORTED, or SDMA_TXREQ_S_SHUTDOWN.
+ *
+ * The flag, if the is the iowait had been used, indicates the iowait
+ * sdma_busy count has reached zero.
+ *
+ * user data portion of tlen should be precise. The sdma_txadd_* entrances
+ * will pad with a descriptor references 1 - 3 bytes when the number of bytes
+ * specified in tlen have been supplied to the sdma_txreq.
+ *
+ * ahg_hlen is used to determine the number of on-chip entry bytes to
+ * use as the header. This is for cases where the stored header is
+ * larger than the header to be used in a packet. This is typical
+ * for verbs where an RDMA_WRITE_FIRST is larger than the packet in
+ * and RDMA_WRITE_MIDDLE.
+ *
+ */
+static inline int sdma_txinit_ahg(
+ struct sdma_txreq *tx,
+ u16 flags,
+ u16 tlen,
+ u8 ahg_entry,
+ u8 num_ahg,
+ u32 *ahg,
+ u8 ahg_hlen,
+ void (*cb)(struct sdma_txreq *, int, int))
+{
+ if (tlen == 0)
+ return -ENODATA;
+ if (tlen > MAX_SDMA_PKT_SIZE)
+ return -EMSGSIZE;
+ tx->desc_limit = ARRAY_SIZE(tx->descs);
+ tx->descp = &tx->descs[0];
+ INIT_LIST_HEAD(&tx->list);
+ tx->num_desc = 0;
+ tx->flags = flags;
+ tx->complete = cb;
+ tx->coalesce_buf = NULL;
+ tx->wait = NULL;
+ tx->tlen = tx->packet_len = tlen;
+ tx->descs[0].qw[0] = SDMA_DESC0_FIRST_DESC_FLAG;
+ tx->descs[0].qw[1] = 0;
+ if (flags & SDMA_TXREQ_F_AHG_COPY)
+ tx->descs[0].qw[1] |=
+ (((u64)ahg_entry & SDMA_DESC1_HEADER_INDEX_MASK)
+ << SDMA_DESC1_HEADER_INDEX_SHIFT) |
+ (((u64)SDMA_AHG_COPY & SDMA_DESC1_HEADER_MODE_MASK)
+ << SDMA_DESC1_HEADER_MODE_SHIFT);
+ else if (flags & SDMA_TXREQ_F_USE_AHG && num_ahg)
+ _sdma_txreq_ahgadd(tx, num_ahg, ahg_entry, ahg, ahg_hlen);
+ return 0;
+}
+
+/**
+ * sdma_txinit() - initialize an sdma_txreq struct (no AHG)
+ * @tx: tx request to initialize
+ * @flags: flags to key last descriptor additions
+ * @tlen: total packet length (pbc + headers + data)
+ * @cb: callback pointer
+ *
+ * The allocation of the sdma_txreq and it enclosing structure is user
+ * dependent. This routine must be called to initialize the user
+ * independent fields.
+ *
+ * The currently supported flags is SDMA_TXREQ_F_URGENT.
+ *
+ * SDMA_TXREQ_F_URGENT is used for latency sensitive situations where the
+ * completion is desired as soon as possible.
+ *
+ * Completions of submitted requests can be gotten on selected
+ * txreqs by giving a completion routine callback to sdma_txinit() or
+ * sdma_txinit_ahg(). The environment in which the callback runs
+ * can be from an ISR, a tasklet, or a thread, so no sleeping
+ * kernel routines can be used. The head size of the sdma ring may
+ * be locked so care should be taken with locking.
+ *
+ * The callback pointer can be NULL to avoid any callback for the packet
+ * being submitted.
+ *
+ * The callback, if non-NULL, will be provided this tx and a status. The
+ * status will be one of SDMA_TXREQ_S_OK, SDMA_TXREQ_S_SENDERROR,
+ * SDMA_TXREQ_S_ABORTED, or SDMA_TXREQ_S_SHUTDOWN.
+ *
+ */
+static inline int sdma_txinit(
+ struct sdma_txreq *tx,
+ u16 flags,
+ u16 tlen,
+ void (*cb)(struct sdma_txreq *, int, int))
+{
+ return sdma_txinit_ahg(tx, flags, tlen, 0, 0, NULL, 0, cb);
+}
+
+/* helpers - don't use */
+static inline int sdma_mapping_type(struct sdma_desc *d)
+{
+ return (d->qw[1] & SDMA_DESC1_GENERATION_SMASK)
+ >> SDMA_DESC1_GENERATION_SHIFT;
+}
+
+static inline size_t sdma_mapping_len(struct sdma_desc *d)
+{
+ return (d->qw[0] & SDMA_DESC0_BYTE_COUNT_SMASK)
+ >> SDMA_DESC0_BYTE_COUNT_SHIFT;
+}
+
+static inline dma_addr_t sdma_mapping_addr(struct sdma_desc *d)
+{
+ return (d->qw[0] & SDMA_DESC0_PHY_ADDR_SMASK)
+ >> SDMA_DESC0_PHY_ADDR_SHIFT;
+}
+
+static inline void make_tx_sdma_desc(
+ struct sdma_txreq *tx,
+ int type,
+ dma_addr_t addr,
+ size_t len)
+{
+ struct sdma_desc *desc = &tx->descp[tx->num_desc];
+
+ if (!tx->num_desc) {
+ /* qw[0] zero; qw[1] first, ahg mode already in from init */
+ desc->qw[1] |= ((u64)type & SDMA_DESC1_GENERATION_MASK)
+ << SDMA_DESC1_GENERATION_SHIFT;
+ } else {
+ desc->qw[0] = 0;
+ desc->qw[1] = ((u64)type & SDMA_DESC1_GENERATION_MASK)
+ << SDMA_DESC1_GENERATION_SHIFT;
+ }
+ desc->qw[0] |= (((u64)addr & SDMA_DESC0_PHY_ADDR_MASK)
+ << SDMA_DESC0_PHY_ADDR_SHIFT) |
+ (((u64)len & SDMA_DESC0_BYTE_COUNT_MASK)
+ << SDMA_DESC0_BYTE_COUNT_SHIFT);
+}
+
+/* helper to extend txreq */
+int _extend_sdma_tx_descs(struct hfi1_devdata *, struct sdma_txreq *);
+int _pad_sdma_tx_descs(struct hfi1_devdata *, struct sdma_txreq *);
+void sdma_txclean(struct hfi1_devdata *, struct sdma_txreq *);
+
+/* helpers used by public routines */
+static inline void _sdma_close_tx(struct hfi1_devdata *dd,
+ struct sdma_txreq *tx)
+{
+ tx->descp[tx->num_desc].qw[0] |=
+ SDMA_DESC0_LAST_DESC_FLAG;
+ tx->descp[tx->num_desc].qw[1] |=
+ dd->default_desc1;
+ if (tx->flags & SDMA_TXREQ_F_URGENT)
+ tx->descp[tx->num_desc].qw[1] |=
+ (SDMA_DESC1_HEAD_TO_HOST_FLAG|
+ SDMA_DESC1_INT_REQ_FLAG);
+}
+
+static inline int _sdma_txadd_daddr(
+ struct hfi1_devdata *dd,
+ int type,
+ struct sdma_txreq *tx,
+ dma_addr_t addr,
+ u16 len)
+{
+ int rval = 0;
+
+ if ((unlikely(tx->num_desc == tx->desc_limit))) {
+ rval = _extend_sdma_tx_descs(dd, tx);
+ if (rval)
+ return rval;
+ }
+ make_tx_sdma_desc(
+ tx,
+ type,
+ addr, len);
+ WARN_ON(len > tx->tlen);
+ tx->tlen -= len;
+ /* special cases for last */
+ if (!tx->tlen) {
+ if (tx->packet_len & (sizeof(u32) - 1))
+ rval = _pad_sdma_tx_descs(dd, tx);
+ else
+ _sdma_close_tx(dd, tx);
+ }
+ tx->num_desc++;
+ return rval;
+}
+
+/**
+ * sdma_txadd_page() - add a page to the sdma_txreq
+ * @dd: the device to use for mapping
+ * @tx: tx request to which the page is added
+ * @page: page to map
+ * @offset: offset within the page
+ * @len: length in bytes
+ *
+ * This is used to add a page/offset/length descriptor.
+ *
+ * The mapping/unmapping of the page/offset/len is automatically handled.
+ *
+ * Return:
+ * 0 - success, -ENOSPC - mapping fail, -ENOMEM - couldn't
+ * extend descriptor array or couldn't allocate coalesce
+ * buffer.
+ *
+ */
+static inline int sdma_txadd_page(
+ struct hfi1_devdata *dd,
+ struct sdma_txreq *tx,
+ struct page *page,
+ unsigned long offset,
+ u16 len)
+{
+ dma_addr_t addr =
+ dma_map_page(
+ &dd->pcidev->dev,
+ page,
+ offset,
+ len,
+ DMA_TO_DEVICE);
+ if (unlikely(dma_mapping_error(&dd->pcidev->dev, addr))) {
+ sdma_txclean(dd, tx);
+ return -ENOSPC;
+ }
+ return _sdma_txadd_daddr(
+ dd, SDMA_MAP_PAGE, tx, addr, len);
+}
+
+/**
+ * sdma_txadd_daddr() - add a dma address to the sdma_txreq
+ * @dd: the device to use for mapping
+ * @tx: sdma_txreq to which the page is added
+ * @addr: dma address mapped by caller
+ * @len: length in bytes
+ *
+ * This is used to add a descriptor for memory that is already dma mapped.
+ *
+ * In this case, there is no unmapping as part of the progress processing for
+ * this memory location.
+ *
+ * Return:
+ * 0 - success, -ENOMEM - couldn't extend descriptor array
+ */
+
+static inline int sdma_txadd_daddr(
+ struct hfi1_devdata *dd,
+ struct sdma_txreq *tx,
+ dma_addr_t addr,
+ u16 len)
+{
+ return _sdma_txadd_daddr(dd, SDMA_MAP_NONE, tx, addr, len);
+}
+
+/**
+ * sdma_txadd_kvaddr() - add a kernel virtual address to sdma_txreq
+ * @dd: the device to use for mapping
+ * @tx: sdma_txreq to which the page is added
+ * @kvaddr: the kernel virtual address
+ * @len: length in bytes
+ *
+ * This is used to add a descriptor referenced by the indicated kvaddr and
+ * len.
+ *
+ * The mapping/unmapping of the kvaddr and len is automatically handled.
+ *
+ * Return:
+ * 0 - success, -ENOSPC - mapping fail, -ENOMEM - couldn't extend
+ * descriptor array
+ */
+static inline int sdma_txadd_kvaddr(
+ struct hfi1_devdata *dd,
+ struct sdma_txreq *tx,
+ void *kvaddr,
+ u16 len)
+{
+ dma_addr_t addr =
+ dma_map_single(
+ &dd->pcidev->dev,
+ kvaddr,
+ len,
+ DMA_TO_DEVICE);
+ if (unlikely(dma_mapping_error(&dd->pcidev->dev, addr))) {
+ sdma_txclean(dd, tx);
+ return -ENOSPC;
+ }
+ return _sdma_txadd_daddr(
+ dd, SDMA_MAP_SINGLE, tx, addr, len);
+}
+
+struct iowait;
+
+int sdma_send_txreq(struct sdma_engine *sde,
+ struct iowait *wait,
+ struct sdma_txreq *tx);
+int sdma_send_txlist(struct sdma_engine *sde,
+ struct iowait *wait,
+ struct list_head *tx_list);
+
+int sdma_ahg_alloc(struct sdma_engine *sde);
+void sdma_ahg_free(struct sdma_engine *sde, int ahg_index);
+
+/**
+ * sdma_build_ahg - build ahg descriptor
+ * @data
+ * @dwindex
+ * @startbit
+ * @bits
+ *
+ * Build and return a 32 bit descriptor.
+ */
+static inline u32 sdma_build_ahg_descriptor(
+ u16 data,
+ u8 dwindex,
+ u8 startbit,
+ u8 bits)
+{
+ return (u32)(1UL << SDMA_AHG_UPDATE_ENABLE_SHIFT |
+ ((startbit & SDMA_AHG_FIELD_START_MASK) <<
+ SDMA_AHG_FIELD_START_SHIFT) |
+ ((bits & SDMA_AHG_FIELD_LEN_MASK) <<
+ SDMA_AHG_FIELD_LEN_SHIFT) |
+ ((dwindex & SDMA_AHG_INDEX_MASK) <<
+ SDMA_AHG_INDEX_SHIFT) |
+ ((data & SDMA_AHG_VALUE_MASK) <<
+ SDMA_AHG_VALUE_SHIFT));
+}
+
+/**
+ * sdma_progress - use seq number of detect head progress
+ * @sde: sdma_engine to check
+ * @seq: base seq count
+ * @tx: txreq for which we need to check descriptor availability
+ *
+ * This is used in the appropriate spot in the sleep routine
+ * to check for potential ring progress. This routine gets the
+ * seqcount before queuing the iowait structure for progress.
+ *
+ * If the seqcount indicates that progress needs to be checked,
+ * re-submission is detected by checking whether the descriptor
+ * queue has enough descriptor for the txreq.
+ */
+static inline unsigned sdma_progress(struct sdma_engine *sde, unsigned seq,
+ struct sdma_txreq *tx)
+{
+ if (read_seqretry(&sde->head_lock, seq)) {
+ sde->desc_avail = sdma_descq_freecnt(sde);
+ if (tx->num_desc > sde->desc_avail)
+ return 0;
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * sdma_iowait_schedule() - initialize wait structure
+ * @sde: sdma_engine to schedule
+ * @wait: wait struct to schedule
+ *
+ * This function initializes the iowait
+ * structure embedded in the QP or PQ.
+ *
+ */
+static inline void sdma_iowait_schedule(
+ struct sdma_engine *sde,
+ struct iowait *wait)
+{
+ iowait_schedule(wait, sde->wq);
+}
+
+/* for use by interrupt handling */
+void sdma_engine_error(struct sdma_engine *sde, u64 status);
+void sdma_engine_interrupt(struct sdma_engine *sde, u64 status);
+
+/*
+ *
+ * The diagram below details the relationship of the mapping structures
+ *
+ * Since the mapping now allows for non-uniform engines per vl, the
+ * number of engines for a vl is either the vl_engines[vl] or
+ * a computation based on num_sdma/num_vls:
+ *
+ * For example:
+ * nactual = vl_engines ? vl_engines[vl] : num_sdma/num_vls
+ *
+ * n = roundup to next highest power of 2 using nactual
+ *
+ * In the case where there are num_sdma/num_vls doesn't divide
+ * evenly, the extras are added from the last vl downward.
+ *
+ * For the case where n > nactual, the engines are assigned
+ * in a round robin fashion wrapping back to the first engine
+ * for a particular vl.
+ *
+ * dd->sdma_map
+ * | sdma_map_elem[0]
+ * | +--------------------+
+ * v | mask |
+ * sdma_vl_map |--------------------|
+ * +--------------------------+ | sde[0] -> eng 1 |
+ * | list (RCU) | |--------------------|
+ * |--------------------------| ->| sde[1] -> eng 2 |
+ * | mask | --/ |--------------------|
+ * |--------------------------| -/ | * |
+ * | actual_vls (max 8) | -/ |--------------------|
+ * |--------------------------| --/ | sde[n] -> eng n |
+ * | vls (max 8) | -/ +--------------------+
+ * |--------------------------| --/
+ * | map[0] |-/
+ * |--------------------------| +--------------------+
+ * | map[1] |--- | mask |
+ * |--------------------------| \---- |--------------------|
+ * | * | \-- | sde[0] -> eng 1+n |
+ * | * | \---- |--------------------|
+ * | * | \->| sde[1] -> eng 2+n |
+ * |--------------------------| |--------------------|
+ * | map[vls - 1] |- | * |
+ * +--------------------------+ \- |--------------------|
+ * \- | sde[m] -> eng m+n |
+ * \ +--------------------+
+ * \-
+ * \
+ * \- +--------------------+
+ * \- | mask |
+ * \ |--------------------|
+ * \- | sde[0] -> eng 1+m+n|
+ * \- |--------------------|
+ * >| sde[1] -> eng 2+m+n|
+ * |--------------------|
+ * | * |
+ * |--------------------|
+ * | sde[o] -> eng o+m+n|
+ * +--------------------+
+ *
+ */
+
+/**
+ * struct sdma_map_elem - mapping for a vl
+ * @mask - selector mask
+ * @sde - array of engines for this vl
+ *
+ * The mask is used to "mod" the selector
+ * to produce index into the trailing
+ * array of sdes.
+ */
+struct sdma_map_elem {
+ u32 mask;
+ struct sdma_engine *sde[0];
+};
+
+/**
+ * struct sdma_map_el - mapping for a vl
+ * @list - rcu head for free callback
+ * @mask - vl mask to "mod" the vl to produce an index to map array
+ * @actual_vls - number of vls
+ * @vls - number of vls rounded to next power of 2
+ * @map - array of sdma_map_elem entries
+ *
+ * This is the parent mapping structure. The trailing
+ * members of the struct point to sdma_map_elem entries, which
+ * in turn point to an array of sde's for that vl.
+ */
+struct sdma_vl_map {
+ struct rcu_head list;
+ u32 mask;
+ u8 actual_vls;
+ u8 vls;
+ struct sdma_map_elem *map[0];
+};
+
+int sdma_map_init(
+ struct hfi1_devdata *dd,
+ u8 port,
+ u8 num_vls,
+ u8 *vl_engines);
+
+/* slow path */
+void _sdma_engine_progress_schedule(struct sdma_engine *sde);
+
+/**
+ * sdma_engine_progress_schedule() - schedule progress on engine
+ * @sde: sdma_engine to schedule progress
+ *
+ * This is the fast path.
+ *
+ */
+static inline void sdma_engine_progress_schedule(
+ struct sdma_engine *sde)
+{
+ if (!sde || sdma_descq_inprocess(sde) < (sde->descq_cnt / 8))
+ return;
+ _sdma_engine_progress_schedule(sde);
+}
+
+struct sdma_engine *sdma_select_engine_sc(
+ struct hfi1_devdata *dd,
+ u32 selector,
+ u8 sc5);
+
+struct sdma_engine *sdma_select_engine_vl(
+ struct hfi1_devdata *dd,
+ u32 selector,
+ u8 vl);
+
+void sdma_seqfile_dump_sde(struct seq_file *s, struct sdma_engine *);
+
+#ifdef CONFIG_SDMA_VERBOSITY
+void sdma_dumpstate(struct sdma_engine *);
+#endif
+static inline char *slashstrip(char *s)
+{
+ char *r = s;
+
+ while (*s)
+ if (*s++ == '/')
+ r = s;
+ return r;
+}
+
+u16 sdma_get_descq_cnt(void);
+
+extern uint mod_num_sdma;
+
+void sdma_update_lmc(struct hfi1_devdata *dd, u64 mask, u32 lid);
+
+#endif
diff --git a/drivers/staging/rdma/hfi1/srq.c b/drivers/staging/rdma/hfi1/srq.c
new file mode 100644
index 0000000..67786d4
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/srq.c
@@ -0,0 +1,397 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include "verbs.h"
+
+/**
+ * hfi1_post_srq_receive - post a receive on a shared receive queue
+ * @ibsrq: the SRQ to post the receive on
+ * @wr: the list of work requests to post
+ * @bad_wr: A pointer to the first WR to cause a problem is put here
+ *
+ * This may be called from interrupt context.
+ */
+int hfi1_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct hfi1_srq *srq = to_isrq(ibsrq);
+ struct hfi1_rwq *wq;
+ unsigned long flags;
+ int ret;
+
+ for (; wr; wr = wr->next) {
+ struct hfi1_rwqe *wqe;
+ u32 next;
+ int i;
+
+ if ((unsigned) wr->num_sge > srq->rq.max_sge) {
+ *bad_wr = wr;
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ spin_lock_irqsave(&srq->rq.lock, flags);
+ wq = srq->rq.wq;
+ next = wq->head + 1;
+ if (next >= srq->rq.size)
+ next = 0;
+ if (next == wq->tail) {
+ spin_unlock_irqrestore(&srq->rq.lock, flags);
+ *bad_wr = wr;
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ wqe = get_rwqe_ptr(&srq->rq, wq->head);
+ wqe->wr_id = wr->wr_id;
+ wqe->num_sge = wr->num_sge;
+ for (i = 0; i < wr->num_sge; i++)
+ wqe->sg_list[i] = wr->sg_list[i];
+ /* Make sure queue entry is written before the head index. */
+ smp_wmb();
+ wq->head = next;
+ spin_unlock_irqrestore(&srq->rq.lock, flags);
+ }
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+/**
+ * hfi1_create_srq - create a shared receive queue
+ * @ibpd: the protection domain of the SRQ to create
+ * @srq_init_attr: the attributes of the SRQ
+ * @udata: data from libibverbs when creating a user SRQ
+ */
+struct ib_srq *hfi1_create_srq(struct ib_pd *ibpd,
+ struct ib_srq_init_attr *srq_init_attr,
+ struct ib_udata *udata)
+{
+ struct hfi1_ibdev *dev = to_idev(ibpd->device);
+ struct hfi1_srq *srq;
+ u32 sz;
+ struct ib_srq *ret;
+
+ if (srq_init_attr->srq_type != IB_SRQT_BASIC) {
+ ret = ERR_PTR(-ENOSYS);
+ goto done;
+ }
+
+ if (srq_init_attr->attr.max_sge == 0 ||
+ srq_init_attr->attr.max_sge > hfi1_max_srq_sges ||
+ srq_init_attr->attr.max_wr == 0 ||
+ srq_init_attr->attr.max_wr > hfi1_max_srq_wrs) {
+ ret = ERR_PTR(-EINVAL);
+ goto done;
+ }
+
+ srq = kmalloc(sizeof(*srq), GFP_KERNEL);
+ if (!srq) {
+ ret = ERR_PTR(-ENOMEM);
+ goto done;
+ }
+
+ /*
+ * Need to use vmalloc() if we want to support large #s of entries.
+ */
+ srq->rq.size = srq_init_attr->attr.max_wr + 1;
+ srq->rq.max_sge = srq_init_attr->attr.max_sge;
+ sz = sizeof(struct ib_sge) * srq->rq.max_sge +
+ sizeof(struct hfi1_rwqe);
+ srq->rq.wq = vmalloc_user(sizeof(struct hfi1_rwq) + srq->rq.size * sz);
+ if (!srq->rq.wq) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_srq;
+ }
+
+ /*
+ * Return the address of the RWQ as the offset to mmap.
+ * See hfi1_mmap() for details.
+ */
+ if (udata && udata->outlen >= sizeof(__u64)) {
+ int err;
+ u32 s = sizeof(struct hfi1_rwq) + srq->rq.size * sz;
+
+ srq->ip =
+ hfi1_create_mmap_info(dev, s, ibpd->uobject->context,
+ srq->rq.wq);
+ if (!srq->ip) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_wq;
+ }
+
+ err = ib_copy_to_udata(udata, &srq->ip->offset,
+ sizeof(srq->ip->offset));
+ if (err) {
+ ret = ERR_PTR(err);
+ goto bail_ip;
+ }
+ } else
+ srq->ip = NULL;
+
+ /*
+ * ib_create_srq() will initialize srq->ibsrq.
+ */
+ spin_lock_init(&srq->rq.lock);
+ srq->rq.wq->head = 0;
+ srq->rq.wq->tail = 0;
+ srq->limit = srq_init_attr->attr.srq_limit;
+
+ spin_lock(&dev->n_srqs_lock);
+ if (dev->n_srqs_allocated == hfi1_max_srqs) {
+ spin_unlock(&dev->n_srqs_lock);
+ ret = ERR_PTR(-ENOMEM);
+ goto bail_ip;
+ }
+
+ dev->n_srqs_allocated++;
+ spin_unlock(&dev->n_srqs_lock);
+
+ if (srq->ip) {
+ spin_lock_irq(&dev->pending_lock);
+ list_add(&srq->ip->pending_mmaps, &dev->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+ }
+
+ ret = &srq->ibsrq;
+ goto done;
+
+bail_ip:
+ kfree(srq->ip);
+bail_wq:
+ vfree(srq->rq.wq);
+bail_srq:
+ kfree(srq);
+done:
+ return ret;
+}
+
+/**
+ * hfi1_modify_srq - modify a shared receive queue
+ * @ibsrq: the SRQ to modify
+ * @attr: the new attributes of the SRQ
+ * @attr_mask: indicates which attributes to modify
+ * @udata: user data for libibverbs.so
+ */
+int hfi1_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
+ enum ib_srq_attr_mask attr_mask,
+ struct ib_udata *udata)
+{
+ struct hfi1_srq *srq = to_isrq(ibsrq);
+ struct hfi1_rwq *wq;
+ int ret = 0;
+
+ if (attr_mask & IB_SRQ_MAX_WR) {
+ struct hfi1_rwq *owq;
+ struct hfi1_rwqe *p;
+ u32 sz, size, n, head, tail;
+
+ /* Check that the requested sizes are below the limits. */
+ if ((attr->max_wr > hfi1_max_srq_wrs) ||
+ ((attr_mask & IB_SRQ_LIMIT) ?
+ attr->srq_limit : srq->limit) > attr->max_wr) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ sz = sizeof(struct hfi1_rwqe) +
+ srq->rq.max_sge * sizeof(struct ib_sge);
+ size = attr->max_wr + 1;
+ wq = vmalloc_user(sizeof(struct hfi1_rwq) + size * sz);
+ if (!wq) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ /* Check that we can write the offset to mmap. */
+ if (udata && udata->inlen >= sizeof(__u64)) {
+ __u64 offset_addr;
+ __u64 offset = 0;
+
+ ret = ib_copy_from_udata(&offset_addr, udata,
+ sizeof(offset_addr));
+ if (ret)
+ goto bail_free;
+ udata->outbuf =
+ (void __user *) (unsigned long) offset_addr;
+ ret = ib_copy_to_udata(udata, &offset,
+ sizeof(offset));
+ if (ret)
+ goto bail_free;
+ }
+
+ spin_lock_irq(&srq->rq.lock);
+ /*
+ * validate head and tail pointer values and compute
+ * the number of remaining WQEs.
+ */
+ owq = srq->rq.wq;
+ head = owq->head;
+ tail = owq->tail;
+ if (head >= srq->rq.size || tail >= srq->rq.size) {
+ ret = -EINVAL;
+ goto bail_unlock;
+ }
+ n = head;
+ if (n < tail)
+ n += srq->rq.size - tail;
+ else
+ n -= tail;
+ if (size <= n) {
+ ret = -EINVAL;
+ goto bail_unlock;
+ }
+ n = 0;
+ p = wq->wq;
+ while (tail != head) {
+ struct hfi1_rwqe *wqe;
+ int i;
+
+ wqe = get_rwqe_ptr(&srq->rq, tail);
+ p->wr_id = wqe->wr_id;
+ p->num_sge = wqe->num_sge;
+ for (i = 0; i < wqe->num_sge; i++)
+ p->sg_list[i] = wqe->sg_list[i];
+ n++;
+ p = (struct hfi1_rwqe *)((char *)p + sz);
+ if (++tail >= srq->rq.size)
+ tail = 0;
+ }
+ srq->rq.wq = wq;
+ srq->rq.size = size;
+ wq->head = n;
+ wq->tail = 0;
+ if (attr_mask & IB_SRQ_LIMIT)
+ srq->limit = attr->srq_limit;
+ spin_unlock_irq(&srq->rq.lock);
+
+ vfree(owq);
+
+ if (srq->ip) {
+ struct hfi1_mmap_info *ip = srq->ip;
+ struct hfi1_ibdev *dev = to_idev(srq->ibsrq.device);
+ u32 s = sizeof(struct hfi1_rwq) + size * sz;
+
+ hfi1_update_mmap_info(dev, ip, s, wq);
+
+ /*
+ * Return the offset to mmap.
+ * See hfi1_mmap() for details.
+ */
+ if (udata && udata->inlen >= sizeof(__u64)) {
+ ret = ib_copy_to_udata(udata, &ip->offset,
+ sizeof(ip->offset));
+ if (ret)
+ goto bail;
+ }
+
+ /*
+ * Put user mapping info onto the pending list
+ * unless it already is on the list.
+ */
+ spin_lock_irq(&dev->pending_lock);
+ if (list_empty(&ip->pending_mmaps))
+ list_add(&ip->pending_mmaps,
+ &dev->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+ }
+ } else if (attr_mask & IB_SRQ_LIMIT) {
+ spin_lock_irq(&srq->rq.lock);
+ if (attr->srq_limit >= srq->rq.size)
+ ret = -EINVAL;
+ else
+ srq->limit = attr->srq_limit;
+ spin_unlock_irq(&srq->rq.lock);
+ }
+ goto bail;
+
+bail_unlock:
+ spin_unlock_irq(&srq->rq.lock);
+bail_free:
+ vfree(wq);
+bail:
+ return ret;
+}
+
+int hfi1_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
+{
+ struct hfi1_srq *srq = to_isrq(ibsrq);
+
+ attr->max_wr = srq->rq.size - 1;
+ attr->max_sge = srq->rq.max_sge;
+ attr->srq_limit = srq->limit;
+ return 0;
+}
+
+/**
+ * hfi1_destroy_srq - destroy a shared receive queue
+ * @ibsrq: the SRQ to destroy
+ */
+int hfi1_destroy_srq(struct ib_srq *ibsrq)
+{
+ struct hfi1_srq *srq = to_isrq(ibsrq);
+ struct hfi1_ibdev *dev = to_idev(ibsrq->device);
+
+ spin_lock(&dev->n_srqs_lock);
+ dev->n_srqs_allocated--;
+ spin_unlock(&dev->n_srqs_lock);
+ if (srq->ip)
+ kref_put(&srq->ip->ref, hfi1_release_mmap_info);
+ else
+ vfree(srq->rq.wq);
+ kfree(srq);
+
+ return 0;
+}
diff --git a/drivers/staging/rdma/hfi1/sysfs.c b/drivers/staging/rdma/hfi1/sysfs.c
new file mode 100644
index 0000000..b78c728
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/sysfs.c
@@ -0,0 +1,739 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <linux/ctype.h>
+
+#include "hfi.h"
+#include "mad.h"
+#include "trace.h"
+
+
+/*
+ * Start of per-port congestion control structures and support code
+ */
+
+/*
+ * Congestion control table size followed by table entries
+ */
+static ssize_t read_cc_table_bin(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t count)
+{
+ int ret;
+ struct hfi1_pportdata *ppd =
+ container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
+ struct cc_state *cc_state;
+
+ ret = ppd->total_cct_entry * sizeof(struct ib_cc_table_entry_shadow)
+ + sizeof(__be16);
+
+ if (pos > ret)
+ return -EINVAL;
+
+ if (count > ret - pos)
+ count = ret - pos;
+
+ if (!count)
+ return count;
+
+ rcu_read_lock();
+ cc_state = get_cc_state(ppd);
+ if (cc_state == NULL) {
+ rcu_read_unlock();
+ return -EINVAL;
+ }
+ memcpy(buf, &cc_state->cct, count);
+ rcu_read_unlock();
+
+ return count;
+}
+
+static void port_release(struct kobject *kobj)
+{
+ /* nothing to do since memory is freed by hfi1_free_devdata() */
+}
+
+static struct kobj_type port_cc_ktype = {
+ .release = port_release,
+};
+
+static struct bin_attribute cc_table_bin_attr = {
+ .attr = {.name = "cc_table_bin", .mode = 0444},
+ .read = read_cc_table_bin,
+ .size = PAGE_SIZE,
+};
+
+/*
+ * Congestion settings: port control, control map and an array of 16
+ * entries for the congestion entries - increase, timer, event log
+ * trigger threshold and the minimum injection rate delay.
+ */
+static ssize_t read_cc_setting_bin(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t count)
+{
+ int ret;
+ struct hfi1_pportdata *ppd =
+ container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
+ struct cc_state *cc_state;
+
+ ret = sizeof(struct opa_congestion_setting_attr_shadow);
+
+ if (pos > ret)
+ return -EINVAL;
+ if (count > ret - pos)
+ count = ret - pos;
+
+ if (!count)
+ return count;
+
+ rcu_read_lock();
+ cc_state = get_cc_state(ppd);
+ if (cc_state == NULL) {
+ rcu_read_unlock();
+ return -EINVAL;
+ }
+ memcpy(buf, &cc_state->cong_setting, count);
+ rcu_read_unlock();
+
+ return count;
+}
+
+static struct bin_attribute cc_setting_bin_attr = {
+ .attr = {.name = "cc_settings_bin", .mode = 0444},
+ .read = read_cc_setting_bin,
+ .size = PAGE_SIZE,
+};
+
+/* Start sc2vl */
+#define HFI1_SC2VL_ATTR(N) \
+ static struct hfi1_sc2vl_attr hfi1_sc2vl_attr_##N = { \
+ .attr = { .name = __stringify(N), .mode = 0444 }, \
+ .sc = N \
+ }
+
+struct hfi1_sc2vl_attr {
+ struct attribute attr;
+ int sc;
+};
+
+HFI1_SC2VL_ATTR(0);
+HFI1_SC2VL_ATTR(1);
+HFI1_SC2VL_ATTR(2);
+HFI1_SC2VL_ATTR(3);
+HFI1_SC2VL_ATTR(4);
+HFI1_SC2VL_ATTR(5);
+HFI1_SC2VL_ATTR(6);
+HFI1_SC2VL_ATTR(7);
+HFI1_SC2VL_ATTR(8);
+HFI1_SC2VL_ATTR(9);
+HFI1_SC2VL_ATTR(10);
+HFI1_SC2VL_ATTR(11);
+HFI1_SC2VL_ATTR(12);
+HFI1_SC2VL_ATTR(13);
+HFI1_SC2VL_ATTR(14);
+HFI1_SC2VL_ATTR(15);
+HFI1_SC2VL_ATTR(16);
+HFI1_SC2VL_ATTR(17);
+HFI1_SC2VL_ATTR(18);
+HFI1_SC2VL_ATTR(19);
+HFI1_SC2VL_ATTR(20);
+HFI1_SC2VL_ATTR(21);
+HFI1_SC2VL_ATTR(22);
+HFI1_SC2VL_ATTR(23);
+HFI1_SC2VL_ATTR(24);
+HFI1_SC2VL_ATTR(25);
+HFI1_SC2VL_ATTR(26);
+HFI1_SC2VL_ATTR(27);
+HFI1_SC2VL_ATTR(28);
+HFI1_SC2VL_ATTR(29);
+HFI1_SC2VL_ATTR(30);
+HFI1_SC2VL_ATTR(31);
+
+
+static struct attribute *sc2vl_default_attributes[] = {
+ &hfi1_sc2vl_attr_0.attr,
+ &hfi1_sc2vl_attr_1.attr,
+ &hfi1_sc2vl_attr_2.attr,
+ &hfi1_sc2vl_attr_3.attr,
+ &hfi1_sc2vl_attr_4.attr,
+ &hfi1_sc2vl_attr_5.attr,
+ &hfi1_sc2vl_attr_6.attr,
+ &hfi1_sc2vl_attr_7.attr,
+ &hfi1_sc2vl_attr_8.attr,
+ &hfi1_sc2vl_attr_9.attr,
+ &hfi1_sc2vl_attr_10.attr,
+ &hfi1_sc2vl_attr_11.attr,
+ &hfi1_sc2vl_attr_12.attr,
+ &hfi1_sc2vl_attr_13.attr,
+ &hfi1_sc2vl_attr_14.attr,
+ &hfi1_sc2vl_attr_15.attr,
+ &hfi1_sc2vl_attr_16.attr,
+ &hfi1_sc2vl_attr_17.attr,
+ &hfi1_sc2vl_attr_18.attr,
+ &hfi1_sc2vl_attr_19.attr,
+ &hfi1_sc2vl_attr_20.attr,
+ &hfi1_sc2vl_attr_21.attr,
+ &hfi1_sc2vl_attr_22.attr,
+ &hfi1_sc2vl_attr_23.attr,
+ &hfi1_sc2vl_attr_24.attr,
+ &hfi1_sc2vl_attr_25.attr,
+ &hfi1_sc2vl_attr_26.attr,
+ &hfi1_sc2vl_attr_27.attr,
+ &hfi1_sc2vl_attr_28.attr,
+ &hfi1_sc2vl_attr_29.attr,
+ &hfi1_sc2vl_attr_30.attr,
+ &hfi1_sc2vl_attr_31.attr,
+ NULL
+};
+
+static ssize_t sc2vl_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct hfi1_sc2vl_attr *sattr =
+ container_of(attr, struct hfi1_sc2vl_attr, attr);
+ struct hfi1_pportdata *ppd =
+ container_of(kobj, struct hfi1_pportdata, sc2vl_kobj);
+ struct hfi1_devdata *dd = ppd->dd;
+
+ return sprintf(buf, "%u\n", *((u8 *)dd->sc2vl + sattr->sc));
+}
+
+static const struct sysfs_ops hfi1_sc2vl_ops = {
+ .show = sc2vl_attr_show,
+};
+
+static struct kobj_type hfi1_sc2vl_ktype = {
+ .release = port_release,
+ .sysfs_ops = &hfi1_sc2vl_ops,
+ .default_attrs = sc2vl_default_attributes
+};
+
+/* End sc2vl */
+
+/* Start sl2sc */
+#define HFI1_SL2SC_ATTR(N) \
+ static struct hfi1_sl2sc_attr hfi1_sl2sc_attr_##N = { \
+ .attr = { .name = __stringify(N), .mode = 0444 }, \
+ .sl = N \
+ }
+
+struct hfi1_sl2sc_attr {
+ struct attribute attr;
+ int sl;
+};
+
+HFI1_SL2SC_ATTR(0);
+HFI1_SL2SC_ATTR(1);
+HFI1_SL2SC_ATTR(2);
+HFI1_SL2SC_ATTR(3);
+HFI1_SL2SC_ATTR(4);
+HFI1_SL2SC_ATTR(5);
+HFI1_SL2SC_ATTR(6);
+HFI1_SL2SC_ATTR(7);
+HFI1_SL2SC_ATTR(8);
+HFI1_SL2SC_ATTR(9);
+HFI1_SL2SC_ATTR(10);
+HFI1_SL2SC_ATTR(11);
+HFI1_SL2SC_ATTR(12);
+HFI1_SL2SC_ATTR(13);
+HFI1_SL2SC_ATTR(14);
+HFI1_SL2SC_ATTR(15);
+HFI1_SL2SC_ATTR(16);
+HFI1_SL2SC_ATTR(17);
+HFI1_SL2SC_ATTR(18);
+HFI1_SL2SC_ATTR(19);
+HFI1_SL2SC_ATTR(20);
+HFI1_SL2SC_ATTR(21);
+HFI1_SL2SC_ATTR(22);
+HFI1_SL2SC_ATTR(23);
+HFI1_SL2SC_ATTR(24);
+HFI1_SL2SC_ATTR(25);
+HFI1_SL2SC_ATTR(26);
+HFI1_SL2SC_ATTR(27);
+HFI1_SL2SC_ATTR(28);
+HFI1_SL2SC_ATTR(29);
+HFI1_SL2SC_ATTR(30);
+HFI1_SL2SC_ATTR(31);
+
+
+static struct attribute *sl2sc_default_attributes[] = {
+ &hfi1_sl2sc_attr_0.attr,
+ &hfi1_sl2sc_attr_1.attr,
+ &hfi1_sl2sc_attr_2.attr,
+ &hfi1_sl2sc_attr_3.attr,
+ &hfi1_sl2sc_attr_4.attr,
+ &hfi1_sl2sc_attr_5.attr,
+ &hfi1_sl2sc_attr_6.attr,
+ &hfi1_sl2sc_attr_7.attr,
+ &hfi1_sl2sc_attr_8.attr,
+ &hfi1_sl2sc_attr_9.attr,
+ &hfi1_sl2sc_attr_10.attr,
+ &hfi1_sl2sc_attr_11.attr,
+ &hfi1_sl2sc_attr_12.attr,
+ &hfi1_sl2sc_attr_13.attr,
+ &hfi1_sl2sc_attr_14.attr,
+ &hfi1_sl2sc_attr_15.attr,
+ &hfi1_sl2sc_attr_16.attr,
+ &hfi1_sl2sc_attr_17.attr,
+ &hfi1_sl2sc_attr_18.attr,
+ &hfi1_sl2sc_attr_19.attr,
+ &hfi1_sl2sc_attr_20.attr,
+ &hfi1_sl2sc_attr_21.attr,
+ &hfi1_sl2sc_attr_22.attr,
+ &hfi1_sl2sc_attr_23.attr,
+ &hfi1_sl2sc_attr_24.attr,
+ &hfi1_sl2sc_attr_25.attr,
+ &hfi1_sl2sc_attr_26.attr,
+ &hfi1_sl2sc_attr_27.attr,
+ &hfi1_sl2sc_attr_28.attr,
+ &hfi1_sl2sc_attr_29.attr,
+ &hfi1_sl2sc_attr_30.attr,
+ &hfi1_sl2sc_attr_31.attr,
+ NULL
+};
+
+static ssize_t sl2sc_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct hfi1_sl2sc_attr *sattr =
+ container_of(attr, struct hfi1_sl2sc_attr, attr);
+ struct hfi1_pportdata *ppd =
+ container_of(kobj, struct hfi1_pportdata, sl2sc_kobj);
+ struct hfi1_ibport *ibp = &ppd->ibport_data;
+
+ return sprintf(buf, "%u\n", ibp->sl_to_sc[sattr->sl]);
+}
+
+static const struct sysfs_ops hfi1_sl2sc_ops = {
+ .show = sl2sc_attr_show,
+};
+
+static struct kobj_type hfi1_sl2sc_ktype = {
+ .release = port_release,
+ .sysfs_ops = &hfi1_sl2sc_ops,
+ .default_attrs = sl2sc_default_attributes
+};
+
+/* End sl2sc */
+
+/* Start vl2mtu */
+
+#define HFI1_VL2MTU_ATTR(N) \
+ static struct hfi1_vl2mtu_attr hfi1_vl2mtu_attr_##N = { \
+ .attr = { .name = __stringify(N), .mode = 0444 }, \
+ .vl = N \
+ }
+
+struct hfi1_vl2mtu_attr {
+ struct attribute attr;
+ int vl;
+};
+
+HFI1_VL2MTU_ATTR(0);
+HFI1_VL2MTU_ATTR(1);
+HFI1_VL2MTU_ATTR(2);
+HFI1_VL2MTU_ATTR(3);
+HFI1_VL2MTU_ATTR(4);
+HFI1_VL2MTU_ATTR(5);
+HFI1_VL2MTU_ATTR(6);
+HFI1_VL2MTU_ATTR(7);
+HFI1_VL2MTU_ATTR(8);
+HFI1_VL2MTU_ATTR(9);
+HFI1_VL2MTU_ATTR(10);
+HFI1_VL2MTU_ATTR(11);
+HFI1_VL2MTU_ATTR(12);
+HFI1_VL2MTU_ATTR(13);
+HFI1_VL2MTU_ATTR(14);
+HFI1_VL2MTU_ATTR(15);
+
+static struct attribute *vl2mtu_default_attributes[] = {
+ &hfi1_vl2mtu_attr_0.attr,
+ &hfi1_vl2mtu_attr_1.attr,
+ &hfi1_vl2mtu_attr_2.attr,
+ &hfi1_vl2mtu_attr_3.attr,
+ &hfi1_vl2mtu_attr_4.attr,
+ &hfi1_vl2mtu_attr_5.attr,
+ &hfi1_vl2mtu_attr_6.attr,
+ &hfi1_vl2mtu_attr_7.attr,
+ &hfi1_vl2mtu_attr_8.attr,
+ &hfi1_vl2mtu_attr_9.attr,
+ &hfi1_vl2mtu_attr_10.attr,
+ &hfi1_vl2mtu_attr_11.attr,
+ &hfi1_vl2mtu_attr_12.attr,
+ &hfi1_vl2mtu_attr_13.attr,
+ &hfi1_vl2mtu_attr_14.attr,
+ &hfi1_vl2mtu_attr_15.attr,
+ NULL
+};
+
+static ssize_t vl2mtu_attr_show(struct kobject *kobj, struct attribute *attr,
+ char *buf)
+{
+ struct hfi1_vl2mtu_attr *vlattr =
+ container_of(attr, struct hfi1_vl2mtu_attr, attr);
+ struct hfi1_pportdata *ppd =
+ container_of(kobj, struct hfi1_pportdata, vl2mtu_kobj);
+ struct hfi1_devdata *dd = ppd->dd;
+
+ return sprintf(buf, "%u\n", dd->vld[vlattr->vl].mtu);
+}
+
+static const struct sysfs_ops hfi1_vl2mtu_ops = {
+ .show = vl2mtu_attr_show,
+};
+
+static struct kobj_type hfi1_vl2mtu_ktype = {
+ .release = port_release,
+ .sysfs_ops = &hfi1_vl2mtu_ops,
+ .default_attrs = vl2mtu_default_attributes
+};
+
+
+/* end of per-port file structures and support code */
+
+/*
+ * Start of per-unit (or driver, in some cases, but replicated
+ * per unit) functions (these get a device *)
+ */
+static ssize_t show_rev(struct device *device, struct device_attribute *attr,
+ char *buf)
+{
+ struct hfi1_ibdev *dev =
+ container_of(device, struct hfi1_ibdev, ibdev.dev);
+
+ return sprintf(buf, "%x\n", dd_from_dev(dev)->minrev);
+}
+
+static ssize_t show_hfi(struct device *device, struct device_attribute *attr,
+ char *buf)
+{
+ struct hfi1_ibdev *dev =
+ container_of(device, struct hfi1_ibdev, ibdev.dev);
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+ int ret;
+
+ if (!dd->boardname)
+ ret = -EINVAL;
+ else
+ ret = scnprintf(buf, PAGE_SIZE, "%s\n", dd->boardname);
+ return ret;
+}
+
+static ssize_t show_boardversion(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct hfi1_ibdev *dev =
+ container_of(device, struct hfi1_ibdev, ibdev.dev);
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+
+ /* The string printed here is already newline-terminated. */
+ return scnprintf(buf, PAGE_SIZE, "%s", dd->boardversion);
+}
+
+
+static ssize_t show_nctxts(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct hfi1_ibdev *dev =
+ container_of(device, struct hfi1_ibdev, ibdev.dev);
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+
+ /*
+ * Return the smaller of send and receive contexts.
+ * Normally, user level applications would require both a send
+ * and a receive context, so returning the smaller of the two counts
+ * give a more accurate picture of total contexts available.
+ */
+ return scnprintf(buf, PAGE_SIZE, "%u\n",
+ min(dd->num_rcv_contexts - dd->first_user_ctxt,
+ (u32)dd->sc_sizes[SC_USER].count));
+}
+
+static ssize_t show_nfreectxts(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct hfi1_ibdev *dev =
+ container_of(device, struct hfi1_ibdev, ibdev.dev);
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+
+ /* Return the number of free user ports (contexts) available. */
+ return scnprintf(buf, PAGE_SIZE, "%u\n", dd->freectxts);
+}
+
+static ssize_t show_serial(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct hfi1_ibdev *dev =
+ container_of(device, struct hfi1_ibdev, ibdev.dev);
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+
+ return scnprintf(buf, PAGE_SIZE, "%s", dd->serial);
+
+}
+
+static ssize_t store_chip_reset(struct device *device,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct hfi1_ibdev *dev =
+ container_of(device, struct hfi1_ibdev, ibdev.dev);
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+ int ret;
+
+ if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ ret = hfi1_reset_device(dd->unit);
+bail:
+ return ret < 0 ? ret : count;
+}
+
+/*
+ * Convert the reported temperature from an integer (reported in
+ * units of 0.25C) to a floating point number.
+ */
+#define temp2str(temp, buf, size, idx) \
+ scnprintf((buf) + (idx), (size) - (idx), "%u.%02u ", \
+ ((temp) >> 2), ((temp) & 0x3) * 25)
+
+/*
+ * Dump tempsense values, in decimal, to ease shell-scripts.
+ */
+static ssize_t show_tempsense(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct hfi1_ibdev *dev =
+ container_of(device, struct hfi1_ibdev, ibdev.dev);
+ struct hfi1_devdata *dd = dd_from_dev(dev);
+ struct hfi1_temp temp;
+ int ret = -ENXIO;
+
+ ret = hfi1_tempsense_rd(dd, &temp);
+ if (!ret) {
+ int idx = 0;
+
+ idx += temp2str(temp.curr, buf, PAGE_SIZE, idx);
+ idx += temp2str(temp.lo_lim, buf, PAGE_SIZE, idx);
+ idx += temp2str(temp.hi_lim, buf, PAGE_SIZE, idx);
+ idx += temp2str(temp.crit_lim, buf, PAGE_SIZE, idx);
+ idx += scnprintf(buf + idx, PAGE_SIZE - idx,
+ "%u %u %u\n", temp.triggers & 0x1,
+ temp.triggers & 0x2, temp.triggers & 0x4);
+ ret = idx;
+ }
+ return ret;
+}
+
+/*
+ * end of per-unit (or driver, in some cases, but replicated
+ * per unit) functions
+ */
+
+/* start of per-unit file structures and support code */
+static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
+static DEVICE_ATTR(board_id, S_IRUGO, show_hfi, NULL);
+static DEVICE_ATTR(nctxts, S_IRUGO, show_nctxts, NULL);
+static DEVICE_ATTR(nfreectxts, S_IRUGO, show_nfreectxts, NULL);
+static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
+static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
+static DEVICE_ATTR(tempsense, S_IRUGO, show_tempsense, NULL);
+static DEVICE_ATTR(chip_reset, S_IWUSR, NULL, store_chip_reset);
+
+static struct device_attribute *hfi1_attributes[] = {
+ &dev_attr_hw_rev,
+ &dev_attr_board_id,
+ &dev_attr_nctxts,
+ &dev_attr_nfreectxts,
+ &dev_attr_serial,
+ &dev_attr_boardversion,
+ &dev_attr_tempsense,
+ &dev_attr_chip_reset,
+};
+
+int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
+ struct kobject *kobj)
+{
+ struct hfi1_pportdata *ppd;
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ int ret;
+
+ if (!port_num || port_num > dd->num_pports) {
+ dd_dev_err(dd,
+ "Skipping infiniband class with invalid port %u\n",
+ port_num);
+ return -ENODEV;
+ }
+ ppd = &dd->pport[port_num - 1];
+
+ ret = kobject_init_and_add(&ppd->sc2vl_kobj, &hfi1_sc2vl_ktype, kobj,
+ "sc2vl");
+ if (ret) {
+ dd_dev_err(dd,
+ "Skipping sc2vl sysfs info, (err %d) port %u\n",
+ ret, port_num);
+ goto bail;
+ }
+ kobject_uevent(&ppd->sc2vl_kobj, KOBJ_ADD);
+
+ ret = kobject_init_and_add(&ppd->sl2sc_kobj, &hfi1_sl2sc_ktype, kobj,
+ "sl2sc");
+ if (ret) {
+ dd_dev_err(dd,
+ "Skipping sl2sc sysfs info, (err %d) port %u\n",
+ ret, port_num);
+ goto bail_sc2vl;
+ }
+ kobject_uevent(&ppd->sl2sc_kobj, KOBJ_ADD);
+
+ ret = kobject_init_and_add(&ppd->vl2mtu_kobj, &hfi1_vl2mtu_ktype, kobj,
+ "vl2mtu");
+ if (ret) {
+ dd_dev_err(dd,
+ "Skipping vl2mtu sysfs info, (err %d) port %u\n",
+ ret, port_num);
+ goto bail_sl2sc;
+ }
+ kobject_uevent(&ppd->vl2mtu_kobj, KOBJ_ADD);
+
+
+ ret = kobject_init_and_add(&ppd->pport_cc_kobj, &port_cc_ktype,
+ kobj, "CCMgtA");
+ if (ret) {
+ dd_dev_err(dd,
+ "Skipping Congestion Control sysfs info, (err %d) port %u\n",
+ ret, port_num);
+ goto bail_vl2mtu;
+ }
+
+ kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);
+
+ ret = sysfs_create_bin_file(&ppd->pport_cc_kobj,
+ &cc_setting_bin_attr);
+ if (ret) {
+ dd_dev_err(dd,
+ "Skipping Congestion Control setting sysfs info, (err %d) port %u\n",
+ ret, port_num);
+ goto bail_cc;
+ }
+
+ ret = sysfs_create_bin_file(&ppd->pport_cc_kobj,
+ &cc_table_bin_attr);
+ if (ret) {
+ dd_dev_err(dd,
+ "Skipping Congestion Control table sysfs info, (err %d) port %u\n",
+ ret, port_num);
+ goto bail_cc_entry_bin;
+ }
+
+ dd_dev_info(dd,
+ "IB%u: Congestion Control Agent enabled for port %d\n",
+ dd->unit, port_num);
+
+ return 0;
+
+bail_cc_entry_bin:
+ sysfs_remove_bin_file(&ppd->pport_cc_kobj,
+ &cc_setting_bin_attr);
+bail_cc:
+ kobject_put(&ppd->pport_cc_kobj);
+bail_vl2mtu:
+ kobject_put(&ppd->vl2mtu_kobj);
+bail_sl2sc:
+ kobject_put(&ppd->sl2sc_kobj);
+bail_sc2vl:
+ kobject_put(&ppd->sc2vl_kobj);
+bail:
+ return ret;
+}
+
+/*
+ * Register and create our files in /sys/class/infiniband.
+ */
+int hfi1_verbs_register_sysfs(struct hfi1_devdata *dd)
+{
+ struct ib_device *dev = &dd->verbs_dev.ibdev;
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(hfi1_attributes); ++i) {
+ ret = device_create_file(&dev->dev, hfi1_attributes[i]);
+ if (ret)
+ goto bail;
+ }
+
+ return 0;
+bail:
+ for (i = 0; i < ARRAY_SIZE(hfi1_attributes); ++i)
+ device_remove_file(&dev->dev, hfi1_attributes[i]);
+ return ret;
+}
+
+/*
+ * Unregister and remove our files in /sys/class/infiniband.
+ */
+void hfi1_verbs_unregister_sysfs(struct hfi1_devdata *dd)
+{
+ struct hfi1_pportdata *ppd;
+ int i;
+
+ for (i = 0; i < dd->num_pports; i++) {
+ ppd = &dd->pport[i];
+
+ sysfs_remove_bin_file(&ppd->pport_cc_kobj,
+ &cc_setting_bin_attr);
+ sysfs_remove_bin_file(&ppd->pport_cc_kobj,
+ &cc_table_bin_attr);
+ kobject_put(&ppd->pport_cc_kobj);
+ kobject_put(&ppd->vl2mtu_kobj);
+ kobject_put(&ppd->sl2sc_kobj);
+ kobject_put(&ppd->sc2vl_kobj);
+ }
+}
diff --git a/drivers/staging/rdma/hfi1/trace.c b/drivers/staging/rdma/hfi1/trace.c
new file mode 100644
index 0000000..70ad7b9
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/trace.c
@@ -0,0 +1,221 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#define CREATE_TRACE_POINTS
+#include "trace.h"
+
+u8 ibhdr_exhdr_len(struct hfi1_ib_header *hdr)
+{
+ struct hfi1_other_headers *ohdr;
+ u8 opcode;
+ u8 lnh = (u8)(be16_to_cpu(hdr->lrh[0]) & 3);
+
+ if (lnh == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth;
+ else
+ ohdr = &hdr->u.l.oth;
+ opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+ return hdr_len_by_opcode[opcode] == 0 ?
+ 0 : hdr_len_by_opcode[opcode] - (12 + 8);
+}
+
+#define IMM_PRN "imm %d"
+#define RETH_PRN "reth vaddr 0x%.16llx rkey 0x%.8x dlen 0x%.8x"
+#define AETH_PRN "aeth syn 0x%.2x msn 0x%.8x"
+#define DETH_PRN "deth qkey 0x%.8x sqpn 0x%.6x"
+#define ATOMICACKETH_PRN "origdata %lld"
+#define ATOMICETH_PRN "vaddr 0x%llx rkey 0x%.8x sdata %lld cdata %lld"
+
+#define OP(transport, op) IB_OPCODE_## transport ## _ ## op
+
+static u64 ib_u64_get(__be32 *p)
+{
+ return ((u64)be32_to_cpu(p[0]) << 32) | be32_to_cpu(p[1]);
+}
+
+const char *parse_everbs_hdrs(
+ struct trace_seq *p,
+ u8 opcode,
+ void *ehdrs)
+{
+ union ib_ehdrs *eh = ehdrs;
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ switch (opcode) {
+ /* imm */
+ case OP(RC, SEND_LAST_WITH_IMMEDIATE):
+ case OP(UC, SEND_LAST_WITH_IMMEDIATE):
+ case OP(RC, SEND_ONLY_WITH_IMMEDIATE):
+ case OP(UC, SEND_ONLY_WITH_IMMEDIATE):
+ case OP(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE):
+ case OP(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE):
+ trace_seq_printf(p, IMM_PRN,
+ be32_to_cpu(eh->imm_data));
+ break;
+ /* reth + imm */
+ case OP(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE):
+ case OP(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE):
+ trace_seq_printf(p, RETH_PRN " " IMM_PRN,
+ (unsigned long long)ib_u64_get(
+ (__be32 *)&eh->rc.reth.vaddr),
+ be32_to_cpu(eh->rc.reth.rkey),
+ be32_to_cpu(eh->rc.reth.length),
+ be32_to_cpu(eh->rc.imm_data));
+ break;
+ /* reth */
+ case OP(RC, RDMA_READ_REQUEST):
+ case OP(RC, RDMA_WRITE_FIRST):
+ case OP(UC, RDMA_WRITE_FIRST):
+ case OP(RC, RDMA_WRITE_ONLY):
+ case OP(UC, RDMA_WRITE_ONLY):
+ trace_seq_printf(p, RETH_PRN,
+ (unsigned long long)ib_u64_get(
+ (__be32 *)&eh->rc.reth.vaddr),
+ be32_to_cpu(eh->rc.reth.rkey),
+ be32_to_cpu(eh->rc.reth.length));
+ break;
+ case OP(RC, RDMA_READ_RESPONSE_FIRST):
+ case OP(RC, RDMA_READ_RESPONSE_LAST):
+ case OP(RC, RDMA_READ_RESPONSE_ONLY):
+ case OP(RC, ACKNOWLEDGE):
+ trace_seq_printf(p, AETH_PRN,
+ be32_to_cpu(eh->aeth) >> 24,
+ be32_to_cpu(eh->aeth) & HFI1_QPN_MASK);
+ break;
+ /* aeth + atomicacketh */
+ case OP(RC, ATOMIC_ACKNOWLEDGE):
+ trace_seq_printf(p, AETH_PRN " " ATOMICACKETH_PRN,
+ (be32_to_cpu(eh->at.aeth) >> 24) & 0xff,
+ be32_to_cpu(eh->at.aeth) & HFI1_QPN_MASK,
+ (unsigned long long)ib_u64_get(eh->at.atomic_ack_eth));
+ break;
+ /* atomiceth */
+ case OP(RC, COMPARE_SWAP):
+ case OP(RC, FETCH_ADD):
+ trace_seq_printf(p, ATOMICETH_PRN,
+ (unsigned long long)ib_u64_get(eh->atomic_eth.vaddr),
+ eh->atomic_eth.rkey,
+ (unsigned long long)ib_u64_get(
+ (__be32 *)&eh->atomic_eth.swap_data),
+ (unsigned long long) ib_u64_get(
+ (__be32 *)&eh->atomic_eth.compare_data));
+ break;
+ /* deth */
+ case OP(UD, SEND_ONLY):
+ case OP(UD, SEND_ONLY_WITH_IMMEDIATE):
+ trace_seq_printf(p, DETH_PRN,
+ be32_to_cpu(eh->ud.deth[0]),
+ be32_to_cpu(eh->ud.deth[1]) & HFI1_QPN_MASK);
+ break;
+ }
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+const char *parse_sdma_flags(
+ struct trace_seq *p,
+ u64 desc0, u64 desc1)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+ char flags[5] = { 'x', 'x', 'x', 'x', 0 };
+
+ flags[0] = (desc1 & SDMA_DESC1_INT_REQ_FLAG) ? 'I' : '-';
+ flags[1] = (desc1 & SDMA_DESC1_HEAD_TO_HOST_FLAG) ? 'H' : '-';
+ flags[2] = (desc0 & SDMA_DESC0_FIRST_DESC_FLAG) ? 'F' : '-';
+ flags[3] = (desc0 & SDMA_DESC0_LAST_DESC_FLAG) ? 'L' : '-';
+ trace_seq_printf(p, "%s", flags);
+ if (desc0 & SDMA_DESC0_FIRST_DESC_FLAG)
+ trace_seq_printf(p, " amode:%u aidx:%u alen:%u",
+ (u8)((desc1 >> SDMA_DESC1_HEADER_MODE_SHIFT)
+ & SDMA_DESC1_HEADER_MODE_MASK),
+ (u8)((desc1 >> SDMA_DESC1_HEADER_INDEX_SHIFT)
+ & SDMA_DESC1_HEADER_INDEX_MASK),
+ (u8)((desc1 >> SDMA_DESC1_HEADER_DWS_SHIFT)
+ & SDMA_DESC1_HEADER_DWS_MASK));
+ return ret;
+}
+
+const char *print_u32_array(
+ struct trace_seq *p,
+ u32 *arr, int len)
+{
+ int i;
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ for (i = 0; i < len ; i++)
+ trace_seq_printf(p, "%s%#x", i == 0 ? "" : " ", arr[i]);
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+const char *print_u64_array(
+ struct trace_seq *p,
+ u64 *arr, int len)
+{
+ int i;
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ for (i = 0; i < len; i++)
+ trace_seq_printf(p, "%s0x%016llx", i == 0 ? "" : " ", arr[i]);
+ trace_seq_putc(p, 0);
+ return ret;
+}
+
+__hfi1_trace_fn(PKT);
+__hfi1_trace_fn(PROC);
+__hfi1_trace_fn(SDMA);
+__hfi1_trace_fn(LINKVERB);
+__hfi1_trace_fn(DEBUG);
+__hfi1_trace_fn(SNOOP);
+__hfi1_trace_fn(CNTR);
+__hfi1_trace_fn(PIO);
+__hfi1_trace_fn(DC8051);
+__hfi1_trace_fn(FIRMWARE);
+__hfi1_trace_fn(RCVCTRL);
+__hfi1_trace_fn(TID);
diff --git a/drivers/staging/rdma/hfi1/trace.h b/drivers/staging/rdma/hfi1/trace.h
new file mode 100644
index 0000000..d7851c0
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/trace.h
@@ -0,0 +1,1409 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#undef TRACE_SYSTEM_VAR
+#define TRACE_SYSTEM_VAR hfi1
+
+#if !defined(__HFI1_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define __HFI1_TRACE_H
+
+#include <linux/tracepoint.h>
+#include <linux/trace_seq.h>
+
+#include "hfi.h"
+#include "mad.h"
+#include "sdma.h"
+
+#define DD_DEV_ENTRY(dd) __string(dev, dev_name(&(dd)->pcidev->dev))
+#define DD_DEV_ASSIGN(dd) __assign_str(dev, dev_name(&(dd)->pcidev->dev))
+
+#define packettype_name(etype) { RHF_RCV_TYPE_##etype, #etype }
+#define show_packettype(etype) \
+__print_symbolic(etype, \
+ packettype_name(EXPECTED), \
+ packettype_name(EAGER), \
+ packettype_name(IB), \
+ packettype_name(ERROR), \
+ packettype_name(BYPASS))
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_rx
+
+TRACE_EVENT(hfi1_rcvhdr,
+ TP_PROTO(struct hfi1_devdata *dd,
+ u64 eflags,
+ u32 ctxt,
+ u32 etype,
+ u32 hlen,
+ u32 tlen,
+ u32 updegr,
+ u32 etail),
+ TP_ARGS(dd, ctxt, eflags, etype, hlen, tlen, updegr, etail),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __field(u64, eflags)
+ __field(u32, ctxt)
+ __field(u32, etype)
+ __field(u32, hlen)
+ __field(u32, tlen)
+ __field(u32, updegr)
+ __field(u32, etail)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd);
+ __entry->eflags = eflags;
+ __entry->ctxt = ctxt;
+ __entry->etype = etype;
+ __entry->hlen = hlen;
+ __entry->tlen = tlen;
+ __entry->updegr = updegr;
+ __entry->etail = etail;
+ ),
+ TP_printk(
+"[%s] ctxt %d eflags 0x%llx etype %d,%s hlen %d tlen %d updegr %d etail %d",
+ __get_str(dev),
+ __entry->ctxt,
+ __entry->eflags,
+ __entry->etype, show_packettype(__entry->etype),
+ __entry->hlen,
+ __entry->tlen,
+ __entry->updegr,
+ __entry->etail
+ )
+);
+
+TRACE_EVENT(hfi1_receive_interrupt,
+ TP_PROTO(struct hfi1_devdata *dd, u32 ctxt),
+ TP_ARGS(dd, ctxt),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __field(u32, ctxt)
+ __field(u8, slow_path)
+ __field(u8, dma_rtail)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd);
+ __entry->ctxt = ctxt;
+ if (dd->rcd[ctxt]->do_interrupt ==
+ &handle_receive_interrupt) {
+ __entry->slow_path = 1;
+ __entry->dma_rtail = 0xFF;
+ } else if (dd->rcd[ctxt]->do_interrupt ==
+ &handle_receive_interrupt_dma_rtail){
+ __entry->dma_rtail = 1;
+ __entry->slow_path = 0;
+ } else if (dd->rcd[ctxt]->do_interrupt ==
+ &handle_receive_interrupt_nodma_rtail) {
+ __entry->dma_rtail = 0;
+ __entry->slow_path = 0;
+ }
+ ),
+ TP_printk(
+ "[%s] ctxt %d SlowPath: %d DmaRtail: %d",
+ __get_str(dev),
+ __entry->ctxt,
+ __entry->slow_path,
+ __entry->dma_rtail
+ )
+);
+
+const char *print_u64_array(struct trace_seq *, u64 *, int);
+
+TRACE_EVENT(hfi1_exp_tid_map,
+ TP_PROTO(unsigned ctxt, u16 subctxt, int dir,
+ unsigned long *maps, u16 count),
+ TP_ARGS(ctxt, subctxt, dir, maps, count),
+ TP_STRUCT__entry(
+ __field(unsigned, ctxt)
+ __field(u16, subctxt)
+ __field(int, dir)
+ __field(u16, count)
+ __dynamic_array(unsigned long, maps, sizeof(*maps) * count)
+ ),
+ TP_fast_assign(
+ __entry->ctxt = ctxt;
+ __entry->subctxt = subctxt;
+ __entry->dir = dir;
+ __entry->count = count;
+ memcpy(__get_dynamic_array(maps), maps,
+ sizeof(*maps) * count);
+ ),
+ TP_printk("[%3u:%02u] %s tidmaps %s",
+ __entry->ctxt,
+ __entry->subctxt,
+ (__entry->dir ? ">" : "<"),
+ print_u64_array(p, __get_dynamic_array(maps),
+ __entry->count)
+ )
+ );
+
+TRACE_EVENT(hfi1_exp_rcv_set,
+ TP_PROTO(unsigned ctxt, u16 subctxt, u32 tid,
+ unsigned long vaddr, u64 phys_addr, void *page),
+ TP_ARGS(ctxt, subctxt, tid, vaddr, phys_addr, page),
+ TP_STRUCT__entry(
+ __field(unsigned, ctxt)
+ __field(u16, subctxt)
+ __field(u32, tid)
+ __field(unsigned long, vaddr)
+ __field(u64, phys_addr)
+ __field(void *, page)
+ ),
+ TP_fast_assign(
+ __entry->ctxt = ctxt;
+ __entry->subctxt = subctxt;
+ __entry->tid = tid;
+ __entry->vaddr = vaddr;
+ __entry->phys_addr = phys_addr;
+ __entry->page = page;
+ ),
+ TP_printk("[%u:%u] TID %u, vaddrs 0x%lx, physaddr 0x%llx, pgp %p",
+ __entry->ctxt,
+ __entry->subctxt,
+ __entry->tid,
+ __entry->vaddr,
+ __entry->phys_addr,
+ __entry->page
+ )
+ );
+
+TRACE_EVENT(hfi1_exp_rcv_free,
+ TP_PROTO(unsigned ctxt, u16 subctxt, u32 tid,
+ unsigned long phys, void *page),
+ TP_ARGS(ctxt, subctxt, tid, phys, page),
+ TP_STRUCT__entry(
+ __field(unsigned, ctxt)
+ __field(u16, subctxt)
+ __field(u32, tid)
+ __field(unsigned long, phys)
+ __field(void *, page)
+ ),
+ TP_fast_assign(
+ __entry->ctxt = ctxt;
+ __entry->subctxt = subctxt;
+ __entry->tid = tid;
+ __entry->phys = phys;
+ __entry->page = page;
+ ),
+ TP_printk("[%u:%u] freeing TID %u, 0x%lx, pgp %p",
+ __entry->ctxt,
+ __entry->subctxt,
+ __entry->tid,
+ __entry->phys,
+ __entry->page
+ )
+ );
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_tx
+
+TRACE_EVENT(hfi1_piofree,
+ TP_PROTO(struct send_context *sc, int extra),
+ TP_ARGS(sc, extra),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(sc->dd)
+ __field(u32, sw_index)
+ __field(u32, hw_context)
+ __field(int, extra)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(sc->dd);
+ __entry->sw_index = sc->sw_index;
+ __entry->hw_context = sc->hw_context;
+ __entry->extra = extra;
+ ),
+ TP_printk(
+ "[%s] ctxt %u(%u) extra %d",
+ __get_str(dev),
+ __entry->sw_index,
+ __entry->hw_context,
+ __entry->extra
+ )
+);
+
+TRACE_EVENT(hfi1_wantpiointr,
+ TP_PROTO(struct send_context *sc, u32 needint, u64 credit_ctrl),
+ TP_ARGS(sc, needint, credit_ctrl),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(sc->dd)
+ __field(u32, sw_index)
+ __field(u32, hw_context)
+ __field(u32, needint)
+ __field(u64, credit_ctrl)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(sc->dd);
+ __entry->sw_index = sc->sw_index;
+ __entry->hw_context = sc->hw_context;
+ __entry->needint = needint;
+ __entry->credit_ctrl = credit_ctrl;
+ ),
+ TP_printk(
+ "[%s] ctxt %u(%u) on %d credit_ctrl 0x%llx",
+ __get_str(dev),
+ __entry->sw_index,
+ __entry->hw_context,
+ __entry->needint,
+ (unsigned long long)__entry->credit_ctrl
+ )
+);
+
+DECLARE_EVENT_CLASS(hfi1_qpsleepwakeup_template,
+ TP_PROTO(struct hfi1_qp *qp, u32 flags),
+ TP_ARGS(qp, flags),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd_from_ibdev(qp->ibqp.device))
+ __field(u32, qpn)
+ __field(u32, flags)
+ __field(u32, s_flags)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd_from_ibdev(qp->ibqp.device))
+ __entry->flags = flags;
+ __entry->qpn = qp->ibqp.qp_num;
+ __entry->s_flags = qp->s_flags;
+ ),
+ TP_printk(
+ "[%s] qpn 0x%x flags 0x%x s_flags 0x%x",
+ __get_str(dev),
+ __entry->qpn,
+ __entry->flags,
+ __entry->s_flags
+ )
+);
+
+DEFINE_EVENT(hfi1_qpsleepwakeup_template, hfi1_qpwakeup,
+ TP_PROTO(struct hfi1_qp *qp, u32 flags),
+ TP_ARGS(qp, flags));
+
+DEFINE_EVENT(hfi1_qpsleepwakeup_template, hfi1_qpsleep,
+ TP_PROTO(struct hfi1_qp *qp, u32 flags),
+ TP_ARGS(qp, flags));
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_qphash
+DECLARE_EVENT_CLASS(hfi1_qphash_template,
+ TP_PROTO(struct hfi1_qp *qp, u32 bucket),
+ TP_ARGS(qp, bucket),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd_from_ibdev(qp->ibqp.device))
+ __field(u32, qpn)
+ __field(u32, bucket)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd_from_ibdev(qp->ibqp.device))
+ __entry->qpn = qp->ibqp.qp_num;
+ __entry->bucket = bucket;
+ ),
+ TP_printk(
+ "[%s] qpn 0x%x bucket %u",
+ __get_str(dev),
+ __entry->qpn,
+ __entry->bucket
+ )
+);
+
+DEFINE_EVENT(hfi1_qphash_template, hfi1_qpinsert,
+ TP_PROTO(struct hfi1_qp *qp, u32 bucket),
+ TP_ARGS(qp, bucket));
+
+DEFINE_EVENT(hfi1_qphash_template, hfi1_qpremove,
+ TP_PROTO(struct hfi1_qp *qp, u32 bucket),
+ TP_ARGS(qp, bucket));
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_ibhdrs
+
+u8 ibhdr_exhdr_len(struct hfi1_ib_header *hdr);
+const char *parse_everbs_hdrs(
+ struct trace_seq *p,
+ u8 opcode,
+ void *ehdrs);
+
+#define __parse_ib_ehdrs(op, ehdrs) parse_everbs_hdrs(p, op, ehdrs)
+
+const char *parse_sdma_flags(
+ struct trace_seq *p,
+ u64 desc0, u64 desc1);
+
+#define __parse_sdma_flags(desc0, desc1) parse_sdma_flags(p, desc0, desc1)
+
+
+#define lrh_name(lrh) { HFI1_##lrh, #lrh }
+#define show_lnh(lrh) \
+__print_symbolic(lrh, \
+ lrh_name(LRH_BTH), \
+ lrh_name(LRH_GRH))
+
+#define ib_opcode_name(opcode) { IB_OPCODE_##opcode, #opcode }
+#define show_ib_opcode(opcode) \
+__print_symbolic(opcode, \
+ ib_opcode_name(RC_SEND_FIRST), \
+ ib_opcode_name(RC_SEND_MIDDLE), \
+ ib_opcode_name(RC_SEND_LAST), \
+ ib_opcode_name(RC_SEND_LAST_WITH_IMMEDIATE), \
+ ib_opcode_name(RC_SEND_ONLY), \
+ ib_opcode_name(RC_SEND_ONLY_WITH_IMMEDIATE), \
+ ib_opcode_name(RC_RDMA_WRITE_FIRST), \
+ ib_opcode_name(RC_RDMA_WRITE_MIDDLE), \
+ ib_opcode_name(RC_RDMA_WRITE_LAST), \
+ ib_opcode_name(RC_RDMA_WRITE_LAST_WITH_IMMEDIATE), \
+ ib_opcode_name(RC_RDMA_WRITE_ONLY), \
+ ib_opcode_name(RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE), \
+ ib_opcode_name(RC_RDMA_READ_REQUEST), \
+ ib_opcode_name(RC_RDMA_READ_RESPONSE_FIRST), \
+ ib_opcode_name(RC_RDMA_READ_RESPONSE_MIDDLE), \
+ ib_opcode_name(RC_RDMA_READ_RESPONSE_LAST), \
+ ib_opcode_name(RC_RDMA_READ_RESPONSE_ONLY), \
+ ib_opcode_name(RC_ACKNOWLEDGE), \
+ ib_opcode_name(RC_ATOMIC_ACKNOWLEDGE), \
+ ib_opcode_name(RC_COMPARE_SWAP), \
+ ib_opcode_name(RC_FETCH_ADD), \
+ ib_opcode_name(UC_SEND_FIRST), \
+ ib_opcode_name(UC_SEND_MIDDLE), \
+ ib_opcode_name(UC_SEND_LAST), \
+ ib_opcode_name(UC_SEND_LAST_WITH_IMMEDIATE), \
+ ib_opcode_name(UC_SEND_ONLY), \
+ ib_opcode_name(UC_SEND_ONLY_WITH_IMMEDIATE), \
+ ib_opcode_name(UC_RDMA_WRITE_FIRST), \
+ ib_opcode_name(UC_RDMA_WRITE_MIDDLE), \
+ ib_opcode_name(UC_RDMA_WRITE_LAST), \
+ ib_opcode_name(UC_RDMA_WRITE_LAST_WITH_IMMEDIATE), \
+ ib_opcode_name(UC_RDMA_WRITE_ONLY), \
+ ib_opcode_name(UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE), \
+ ib_opcode_name(UD_SEND_ONLY), \
+ ib_opcode_name(UD_SEND_ONLY_WITH_IMMEDIATE))
+
+
+#define LRH_PRN "vl %d lver %d sl %d lnh %d,%s dlid %.4x len %d slid %.4x"
+#define BTH_PRN \
+ "op 0x%.2x,%s se %d m %d pad %d tver %d pkey 0x%.4x " \
+ "f %d b %d qpn 0x%.6x a %d psn 0x%.8x"
+#define EHDR_PRN "%s"
+
+DECLARE_EVENT_CLASS(hfi1_ibhdr_template,
+ TP_PROTO(struct hfi1_devdata *dd,
+ struct hfi1_ib_header *hdr),
+ TP_ARGS(dd, hdr),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ /* LRH */
+ __field(u8, vl)
+ __field(u8, lver)
+ __field(u8, sl)
+ __field(u8, lnh)
+ __field(u16, dlid)
+ __field(u16, len)
+ __field(u16, slid)
+ /* BTH */
+ __field(u8, opcode)
+ __field(u8, se)
+ __field(u8, m)
+ __field(u8, pad)
+ __field(u8, tver)
+ __field(u16, pkey)
+ __field(u8, f)
+ __field(u8, b)
+ __field(u32, qpn)
+ __field(u8, a)
+ __field(u32, psn)
+ /* extended headers */
+ __dynamic_array(u8, ehdrs, ibhdr_exhdr_len(hdr))
+ ),
+ TP_fast_assign(
+ struct hfi1_other_headers *ohdr;
+
+ DD_DEV_ASSIGN(dd);
+ /* LRH */
+ __entry->vl =
+ (u8)(be16_to_cpu(hdr->lrh[0]) >> 12);
+ __entry->lver =
+ (u8)(be16_to_cpu(hdr->lrh[0]) >> 8) & 0xf;
+ __entry->sl =
+ (u8)(be16_to_cpu(hdr->lrh[0]) >> 4) & 0xf;
+ __entry->lnh =
+ (u8)(be16_to_cpu(hdr->lrh[0]) & 3);
+ __entry->dlid =
+ be16_to_cpu(hdr->lrh[1]);
+ /* allow for larger len */
+ __entry->len =
+ be16_to_cpu(hdr->lrh[2]);
+ __entry->slid =
+ be16_to_cpu(hdr->lrh[3]);
+ /* BTH */
+ if (__entry->lnh == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth;
+ else
+ ohdr = &hdr->u.l.oth;
+ __entry->opcode =
+ (be32_to_cpu(ohdr->bth[0]) >> 24) & 0xff;
+ __entry->se =
+ (be32_to_cpu(ohdr->bth[0]) >> 23) & 1;
+ __entry->m =
+ (be32_to_cpu(ohdr->bth[0]) >> 22) & 1;
+ __entry->pad =
+ (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ __entry->tver =
+ (be32_to_cpu(ohdr->bth[0]) >> 16) & 0xf;
+ __entry->pkey =
+ be32_to_cpu(ohdr->bth[0]) & 0xffff;
+ __entry->f =
+ (be32_to_cpu(ohdr->bth[1]) >> HFI1_FECN_SHIFT)
+ & HFI1_FECN_MASK;
+ __entry->b =
+ (be32_to_cpu(ohdr->bth[1]) >> HFI1_BECN_SHIFT)
+ & HFI1_BECN_MASK;
+ __entry->qpn =
+ be32_to_cpu(ohdr->bth[1]) & HFI1_QPN_MASK;
+ __entry->a =
+ (be32_to_cpu(ohdr->bth[2]) >> 31) & 1;
+ /* allow for larger PSN */
+ __entry->psn =
+ be32_to_cpu(ohdr->bth[2]) & 0x7fffffff;
+ /* extended headers */
+ memcpy(
+ __get_dynamic_array(ehdrs),
+ &ohdr->u,
+ ibhdr_exhdr_len(hdr));
+ ),
+ TP_printk("[%s] " LRH_PRN " " BTH_PRN " " EHDR_PRN,
+ __get_str(dev),
+ /* LRH */
+ __entry->vl,
+ __entry->lver,
+ __entry->sl,
+ __entry->lnh, show_lnh(__entry->lnh),
+ __entry->dlid,
+ __entry->len,
+ __entry->slid,
+ /* BTH */
+ __entry->opcode, show_ib_opcode(__entry->opcode),
+ __entry->se,
+ __entry->m,
+ __entry->pad,
+ __entry->tver,
+ __entry->pkey,
+ __entry->f,
+ __entry->b,
+ __entry->qpn,
+ __entry->a,
+ __entry->psn,
+ /* extended headers */
+ __parse_ib_ehdrs(
+ __entry->opcode,
+ (void *)__get_dynamic_array(ehdrs))
+ )
+);
+
+DEFINE_EVENT(hfi1_ibhdr_template, input_ibhdr,
+ TP_PROTO(struct hfi1_devdata *dd, struct hfi1_ib_header *hdr),
+ TP_ARGS(dd, hdr));
+
+DEFINE_EVENT(hfi1_ibhdr_template, output_ibhdr,
+ TP_PROTO(struct hfi1_devdata *dd, struct hfi1_ib_header *hdr),
+ TP_ARGS(dd, hdr));
+
+#define SNOOP_PRN \
+ "slid %.4x dlid %.4x qpn 0x%.6x opcode 0x%.2x,%s " \
+ "svc lvl %d pkey 0x%.4x [header = %d bytes] [data = %d bytes]"
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_snoop
+
+
+TRACE_EVENT(snoop_capture,
+ TP_PROTO(struct hfi1_devdata *dd,
+ int hdr_len,
+ struct hfi1_ib_header *hdr,
+ int data_len,
+ void *data),
+ TP_ARGS(dd, hdr_len, hdr, data_len, data),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __field(u16, slid)
+ __field(u16, dlid)
+ __field(u32, qpn)
+ __field(u8, opcode)
+ __field(u8, sl)
+ __field(u16, pkey)
+ __field(u32, hdr_len)
+ __field(u32, data_len)
+ __field(u8, lnh)
+ __dynamic_array(u8, raw_hdr, hdr_len)
+ __dynamic_array(u8, raw_pkt, data_len)
+ ),
+ TP_fast_assign(
+ struct hfi1_other_headers *ohdr;
+
+ __entry->lnh = (u8)(be16_to_cpu(hdr->lrh[0]) & 3);
+ if (__entry->lnh == HFI1_LRH_BTH)
+ ohdr = &hdr->u.oth;
+ else
+ ohdr = &hdr->u.l.oth;
+ DD_DEV_ASSIGN(dd);
+ __entry->slid = be16_to_cpu(hdr->lrh[3]);
+ __entry->dlid = be16_to_cpu(hdr->lrh[1]);
+ __entry->qpn = be32_to_cpu(ohdr->bth[1]) & HFI1_QPN_MASK;
+ __entry->opcode = (be32_to_cpu(ohdr->bth[0]) >> 24) & 0xff;
+ __entry->sl = (u8)(be16_to_cpu(hdr->lrh[0]) >> 4) & 0xf;
+ __entry->pkey = be32_to_cpu(ohdr->bth[0]) & 0xffff;
+ __entry->hdr_len = hdr_len;
+ __entry->data_len = data_len;
+ memcpy(__get_dynamic_array(raw_hdr), hdr, hdr_len);
+ memcpy(__get_dynamic_array(raw_pkt), data, data_len);
+ ),
+ TP_printk("[%s] " SNOOP_PRN,
+ __get_str(dev),
+ __entry->slid,
+ __entry->dlid,
+ __entry->qpn,
+ __entry->opcode,
+ show_ib_opcode(__entry->opcode),
+ __entry->sl,
+ __entry->pkey,
+ __entry->hdr_len,
+ __entry->data_len
+ )
+);
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_ctxts
+
+#define UCTXT_FMT \
+ "cred:%u, credaddr:0x%llx, piobase:0x%llx, rcvhdr_cnt:%u, " \
+ "rcvbase:0x%llx, rcvegrc:%u, rcvegrb:0x%llx"
+TRACE_EVENT(hfi1_uctxtdata,
+ TP_PROTO(struct hfi1_devdata *dd, struct hfi1_ctxtdata *uctxt),
+ TP_ARGS(dd, uctxt),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __field(unsigned, ctxt)
+ __field(u32, credits)
+ __field(u64, hw_free)
+ __field(u64, piobase)
+ __field(u16, rcvhdrq_cnt)
+ __field(u64, rcvhdrq_phys)
+ __field(u32, eager_cnt)
+ __field(u64, rcvegr_phys)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd);
+ __entry->ctxt = uctxt->ctxt;
+ __entry->credits = uctxt->sc->credits;
+ __entry->hw_free = (u64)uctxt->sc->hw_free;
+ __entry->piobase = (u64)uctxt->sc->base_addr;
+ __entry->rcvhdrq_cnt = uctxt->rcvhdrq_cnt;
+ __entry->rcvhdrq_phys = uctxt->rcvhdrq_phys;
+ __entry->eager_cnt = uctxt->egrbufs.alloced;
+ __entry->rcvegr_phys = uctxt->egrbufs.rcvtids[0].phys;
+ ),
+ TP_printk(
+ "[%s] ctxt %u " UCTXT_FMT,
+ __get_str(dev),
+ __entry->ctxt,
+ __entry->credits,
+ __entry->hw_free,
+ __entry->piobase,
+ __entry->rcvhdrq_cnt,
+ __entry->rcvhdrq_phys,
+ __entry->eager_cnt,
+ __entry->rcvegr_phys
+ )
+ );
+
+#define CINFO_FMT \
+ "egrtids:%u, egr_size:%u, hdrq_cnt:%u, hdrq_size:%u, sdma_ring_size:%u"
+TRACE_EVENT(hfi1_ctxt_info,
+ TP_PROTO(struct hfi1_devdata *dd, unsigned ctxt, unsigned subctxt,
+ struct hfi1_ctxt_info cinfo),
+ TP_ARGS(dd, ctxt, subctxt, cinfo),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __field(unsigned, ctxt)
+ __field(unsigned, subctxt)
+ __field(u16, egrtids)
+ __field(u16, rcvhdrq_cnt)
+ __field(u16, rcvhdrq_size)
+ __field(u16, sdma_ring_size)
+ __field(u32, rcvegr_size)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd);
+ __entry->ctxt = ctxt;
+ __entry->subctxt = subctxt;
+ __entry->egrtids = cinfo.egrtids;
+ __entry->rcvhdrq_cnt = cinfo.rcvhdrq_cnt;
+ __entry->rcvhdrq_size = cinfo.rcvhdrq_entsize;
+ __entry->sdma_ring_size = cinfo.sdma_ring_size;
+ __entry->rcvegr_size = cinfo.rcvegr_size;
+ ),
+ TP_printk(
+ "[%s] ctxt %u:%u " CINFO_FMT,
+ __get_str(dev),
+ __entry->ctxt,
+ __entry->subctxt,
+ __entry->egrtids,
+ __entry->rcvegr_size,
+ __entry->rcvhdrq_cnt,
+ __entry->rcvhdrq_size,
+ __entry->sdma_ring_size
+ )
+ );
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_sma
+
+#define BCT_FORMAT \
+ "shared_limit %x vls 0-7 [%x,%x][%x,%x][%x,%x][%x,%x][%x,%x][%x,%x][%x,%x][%x,%x] 15 [%x,%x]"
+
+#define BCT(field) \
+ be16_to_cpu( \
+ ((struct buffer_control *)__get_dynamic_array(bct))->field \
+ )
+
+DECLARE_EVENT_CLASS(hfi1_bct_template,
+ TP_PROTO(struct hfi1_devdata *dd, struct buffer_control *bc),
+ TP_ARGS(dd, bc),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __dynamic_array(u8, bct, sizeof(*bc))
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd);
+ memcpy(
+ __get_dynamic_array(bct),
+ bc,
+ sizeof(*bc));
+ ),
+ TP_printk(BCT_FORMAT,
+ BCT(overall_shared_limit),
+
+ BCT(vl[0].dedicated),
+ BCT(vl[0].shared),
+
+ BCT(vl[1].dedicated),
+ BCT(vl[1].shared),
+
+ BCT(vl[2].dedicated),
+ BCT(vl[2].shared),
+
+ BCT(vl[3].dedicated),
+ BCT(vl[3].shared),
+
+ BCT(vl[4].dedicated),
+ BCT(vl[4].shared),
+
+ BCT(vl[5].dedicated),
+ BCT(vl[5].shared),
+
+ BCT(vl[6].dedicated),
+ BCT(vl[6].shared),
+
+ BCT(vl[7].dedicated),
+ BCT(vl[7].shared),
+
+ BCT(vl[15].dedicated),
+ BCT(vl[15].shared)
+ )
+);
+
+
+DEFINE_EVENT(hfi1_bct_template, bct_set,
+ TP_PROTO(struct hfi1_devdata *dd, struct buffer_control *bc),
+ TP_ARGS(dd, bc));
+
+DEFINE_EVENT(hfi1_bct_template, bct_get,
+ TP_PROTO(struct hfi1_devdata *dd, struct buffer_control *bc),
+ TP_ARGS(dd, bc));
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_sdma
+
+TRACE_EVENT(hfi1_sdma_descriptor,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ u64 desc0,
+ u64 desc1,
+ u16 e,
+ void *descp),
+ TP_ARGS(sde, desc0, desc1, e, descp),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(sde->dd)
+ __field(void *, descp)
+ __field(u64, desc0)
+ __field(u64, desc1)
+ __field(u16, e)
+ __field(u8, idx)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(sde->dd);
+ __entry->desc0 = desc0;
+ __entry->desc1 = desc1;
+ __entry->idx = sde->this_idx;
+ __entry->descp = descp;
+ __entry->e = e;
+ ),
+ TP_printk(
+ "[%s] SDE(%u) flags:%s addr:0x%016llx gen:%u len:%u d0:%016llx d1:%016llx to %p,%u",
+ __get_str(dev),
+ __entry->idx,
+ __parse_sdma_flags(__entry->desc0, __entry->desc1),
+ (__entry->desc0 >> SDMA_DESC0_PHY_ADDR_SHIFT)
+ & SDMA_DESC0_PHY_ADDR_MASK,
+ (u8)((__entry->desc1 >> SDMA_DESC1_GENERATION_SHIFT)
+ & SDMA_DESC1_GENERATION_MASK),
+ (u16)((__entry->desc0 >> SDMA_DESC0_BYTE_COUNT_SHIFT)
+ & SDMA_DESC0_BYTE_COUNT_MASK),
+ __entry->desc0,
+ __entry->desc1,
+ __entry->descp,
+ __entry->e
+ )
+);
+
+TRACE_EVENT(hfi1_sdma_engine_select,
+ TP_PROTO(struct hfi1_devdata *dd, u32 sel, u8 vl, u8 idx),
+ TP_ARGS(dd, sel, vl, idx),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __field(u32, sel)
+ __field(u8, vl)
+ __field(u8, idx)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd);
+ __entry->sel = sel;
+ __entry->vl = vl;
+ __entry->idx = idx;
+ ),
+ TP_printk(
+ "[%s] selecting SDE %u sel 0x%x vl %u",
+ __get_str(dev),
+ __entry->idx,
+ __entry->sel,
+ __entry->vl
+ )
+);
+
+DECLARE_EVENT_CLASS(hfi1_sdma_engine_class,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ u64 status
+ ),
+ TP_ARGS(sde, status),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(sde->dd)
+ __field(u64, status)
+ __field(u8, idx)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(sde->dd);
+ __entry->status = status;
+ __entry->idx = sde->this_idx;
+ ),
+ TP_printk(
+ "[%s] SDE(%u) status %llx",
+ __get_str(dev),
+ __entry->idx,
+ (unsigned long long)__entry->status
+ )
+);
+
+DEFINE_EVENT(hfi1_sdma_engine_class, hfi1_sdma_engine_interrupt,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ u64 status
+ ),
+ TP_ARGS(sde, status)
+);
+
+DEFINE_EVENT(hfi1_sdma_engine_class, hfi1_sdma_engine_progress,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ u64 status
+ ),
+ TP_ARGS(sde, status)
+);
+
+DECLARE_EVENT_CLASS(hfi1_sdma_ahg_ad,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ int aidx
+ ),
+ TP_ARGS(sde, aidx),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(sde->dd)
+ __field(int, aidx)
+ __field(u8, idx)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(sde->dd);
+ __entry->idx = sde->this_idx;
+ __entry->aidx = aidx;
+ ),
+ TP_printk(
+ "[%s] SDE(%u) aidx %d",
+ __get_str(dev),
+ __entry->idx,
+ __entry->aidx
+ )
+);
+
+DEFINE_EVENT(hfi1_sdma_ahg_ad, hfi1_ahg_allocate,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ int aidx
+ ),
+ TP_ARGS(sde, aidx));
+
+DEFINE_EVENT(hfi1_sdma_ahg_ad, hfi1_ahg_deallocate,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ int aidx
+ ),
+ TP_ARGS(sde, aidx));
+
+#ifdef CONFIG_HFI1_DEBUG_SDMA_ORDER
+TRACE_EVENT(hfi1_sdma_progress,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ u16 hwhead,
+ u16 swhead,
+ struct sdma_txreq *txp
+ ),
+ TP_ARGS(sde, hwhead, swhead, txp),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(sde->dd)
+ __field(u64, sn)
+ __field(u16, hwhead)
+ __field(u16, swhead)
+ __field(u16, txnext)
+ __field(u16, tx_tail)
+ __field(u16, tx_head)
+ __field(u8, idx)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(sde->dd);
+ __entry->hwhead = hwhead;
+ __entry->swhead = swhead;
+ __entry->tx_tail = sde->tx_tail;
+ __entry->tx_head = sde->tx_head;
+ __entry->txnext = txp ? txp->next_descq_idx : ~0;
+ __entry->idx = sde->this_idx;
+ __entry->sn = txp ? txp->sn : ~0;
+ ),
+ TP_printk(
+ "[%s] SDE(%u) sn %llu hwhead %u swhead %u next_descq_idx %u tx_head %u tx_tail %u",
+ __get_str(dev),
+ __entry->idx,
+ __entry->sn,
+ __entry->hwhead,
+ __entry->swhead,
+ __entry->txnext,
+ __entry->tx_head,
+ __entry->tx_tail
+ )
+);
+#else
+TRACE_EVENT(hfi1_sdma_progress,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ u16 hwhead,
+ u16 swhead,
+ struct sdma_txreq *txp
+ ),
+ TP_ARGS(sde, hwhead, swhead, txp),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(sde->dd)
+ __field(u16, hwhead)
+ __field(u16, swhead)
+ __field(u16, txnext)
+ __field(u16, tx_tail)
+ __field(u16, tx_head)
+ __field(u8, idx)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(sde->dd);
+ __entry->hwhead = hwhead;
+ __entry->swhead = swhead;
+ __entry->tx_tail = sde->tx_tail;
+ __entry->tx_head = sde->tx_head;
+ __entry->txnext = txp ? txp->next_descq_idx : ~0;
+ __entry->idx = sde->this_idx;
+ ),
+ TP_printk(
+ "[%s] SDE(%u) hwhead %u swhead %u next_descq_idx %u tx_head %u tx_tail %u",
+ __get_str(dev),
+ __entry->idx,
+ __entry->hwhead,
+ __entry->swhead,
+ __entry->txnext,
+ __entry->tx_head,
+ __entry->tx_tail
+ )
+);
+#endif
+
+DECLARE_EVENT_CLASS(hfi1_sdma_sn,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ u64 sn
+ ),
+ TP_ARGS(sde, sn),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(sde->dd)
+ __field(u64, sn)
+ __field(u8, idx)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(sde->dd);
+ __entry->sn = sn;
+ __entry->idx = sde->this_idx;
+ ),
+ TP_printk(
+ "[%s] SDE(%u) sn %llu",
+ __get_str(dev),
+ __entry->idx,
+ __entry->sn
+ )
+);
+
+DEFINE_EVENT(hfi1_sdma_sn, hfi1_sdma_out_sn,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ u64 sn
+ ),
+ TP_ARGS(sde, sn)
+);
+
+DEFINE_EVENT(hfi1_sdma_sn, hfi1_sdma_in_sn,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ u64 sn
+ ),
+ TP_ARGS(sde, sn)
+);
+
+#define USDMA_HDR_FORMAT \
+ "[%s:%u:%u:%u] PBC=(0x%x 0x%x) LRH=(0x%x 0x%x) BTH=(0x%x 0x%x 0x%x) KDETH=(0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x) TIDVal=0x%x"
+
+TRACE_EVENT(hfi1_sdma_user_header,
+ TP_PROTO(struct hfi1_devdata *dd, u16 ctxt, u8 subctxt, u16 req,
+ struct hfi1_pkt_header *hdr, u32 tidval),
+ TP_ARGS(dd, ctxt, subctxt, req, hdr, tidval),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __field(u16, ctxt)
+ __field(u8, subctxt)
+ __field(u16, req)
+ __field(__le32, pbc0)
+ __field(__le32, pbc1)
+ __field(__be32, lrh0)
+ __field(__be32, lrh1)
+ __field(__be32, bth0)
+ __field(__be32, bth1)
+ __field(__be32, bth2)
+ __field(__le32, kdeth0)
+ __field(__le32, kdeth1)
+ __field(__le32, kdeth2)
+ __field(__le32, kdeth3)
+ __field(__le32, kdeth4)
+ __field(__le32, kdeth5)
+ __field(__le32, kdeth6)
+ __field(__le32, kdeth7)
+ __field(__le32, kdeth8)
+ __field(u32, tidval)
+ ),
+ TP_fast_assign(
+ __le32 *pbc = (__le32 *)hdr->pbc;
+ __be32 *lrh = (__be32 *)hdr->lrh;
+ __be32 *bth = (__be32 *)hdr->bth;
+ __le32 *kdeth = (__le32 *)&hdr->kdeth;
+
+ DD_DEV_ASSIGN(dd);
+ __entry->ctxt = ctxt;
+ __entry->subctxt = subctxt;
+ __entry->req = req;
+ __entry->pbc0 = pbc[0];
+ __entry->pbc1 = pbc[1];
+ __entry->lrh0 = be32_to_cpu(lrh[0]);
+ __entry->lrh1 = be32_to_cpu(lrh[1]);
+ __entry->bth0 = be32_to_cpu(bth[0]);
+ __entry->bth1 = be32_to_cpu(bth[1]);
+ __entry->bth2 = be32_to_cpu(bth[2]);
+ __entry->kdeth0 = kdeth[0];
+ __entry->kdeth1 = kdeth[1];
+ __entry->kdeth2 = kdeth[2];
+ __entry->kdeth3 = kdeth[3];
+ __entry->kdeth4 = kdeth[4];
+ __entry->kdeth5 = kdeth[5];
+ __entry->kdeth6 = kdeth[6];
+ __entry->kdeth7 = kdeth[7];
+ __entry->kdeth8 = kdeth[8];
+ __entry->tidval = tidval;
+ ),
+ TP_printk(USDMA_HDR_FORMAT,
+ __get_str(dev),
+ __entry->ctxt,
+ __entry->subctxt,
+ __entry->req,
+ __entry->pbc1,
+ __entry->pbc0,
+ __entry->lrh0,
+ __entry->lrh1,
+ __entry->bth0,
+ __entry->bth1,
+ __entry->bth2,
+ __entry->kdeth0,
+ __entry->kdeth1,
+ __entry->kdeth2,
+ __entry->kdeth3,
+ __entry->kdeth4,
+ __entry->kdeth5,
+ __entry->kdeth6,
+ __entry->kdeth7,
+ __entry->kdeth8,
+ __entry->tidval
+ )
+ );
+
+#define SDMA_UREQ_FMT \
+ "[%s:%u:%u] ver/op=0x%x, iovcnt=%u, npkts=%u, frag=%u, idx=%u"
+TRACE_EVENT(hfi1_sdma_user_reqinfo,
+ TP_PROTO(struct hfi1_devdata *dd, u16 ctxt, u8 subctxt, u16 *i),
+ TP_ARGS(dd, ctxt, subctxt, i),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd);
+ __field(u16, ctxt)
+ __field(u8, subctxt)
+ __field(u8, ver_opcode)
+ __field(u8, iovcnt)
+ __field(u16, npkts)
+ __field(u16, fragsize)
+ __field(u16, comp_idx)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd);
+ __entry->ctxt = ctxt;
+ __entry->subctxt = subctxt;
+ __entry->ver_opcode = i[0] & 0xff;
+ __entry->iovcnt = (i[0] >> 8) & 0xff;
+ __entry->npkts = i[1];
+ __entry->fragsize = i[2];
+ __entry->comp_idx = i[3];
+ ),
+ TP_printk(SDMA_UREQ_FMT,
+ __get_str(dev),
+ __entry->ctxt,
+ __entry->subctxt,
+ __entry->ver_opcode,
+ __entry->iovcnt,
+ __entry->npkts,
+ __entry->fragsize,
+ __entry->comp_idx
+ )
+ );
+
+#define usdma_complete_name(st) { st, #st }
+#define show_usdma_complete_state(st) \
+ __print_symbolic(st, \
+ usdma_complete_name(FREE), \
+ usdma_complete_name(QUEUED), \
+ usdma_complete_name(COMPLETE), \
+ usdma_complete_name(ERROR))
+
+TRACE_EVENT(hfi1_sdma_user_completion,
+ TP_PROTO(struct hfi1_devdata *dd, u16 ctxt, u8 subctxt, u16 idx,
+ u8 state, int code),
+ TP_ARGS(dd, ctxt, subctxt, idx, state, code),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __field(u16, ctxt)
+ __field(u8, subctxt)
+ __field(u16, idx)
+ __field(u8, state)
+ __field(int, code)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd);
+ __entry->ctxt = ctxt;
+ __entry->subctxt = subctxt;
+ __entry->idx = idx;
+ __entry->state = state;
+ __entry->code = code;
+ ),
+ TP_printk("[%s:%u:%u:%u] SDMA completion state %s (%d)",
+ __get_str(dev), __entry->ctxt, __entry->subctxt,
+ __entry->idx, show_usdma_complete_state(__entry->state),
+ __entry->code)
+ );
+
+const char *print_u32_array(struct trace_seq *, u32 *, int);
+#define __print_u32_hex(arr, len) print_u32_array(p, arr, len)
+
+TRACE_EVENT(hfi1_sdma_user_header_ahg,
+ TP_PROTO(struct hfi1_devdata *dd, u16 ctxt, u8 subctxt, u16 req,
+ u8 sde, u8 ahgidx, u32 *ahg, int len, u32 tidval),
+ TP_ARGS(dd, ctxt, subctxt, req, sde, ahgidx, ahg, len, tidval),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __field(u16, ctxt)
+ __field(u8, subctxt)
+ __field(u16, req)
+ __field(u8, sde)
+ __field(u8, idx)
+ __field(int, len)
+ __field(u32, tidval)
+ __array(u32, ahg, 10)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd);
+ __entry->ctxt = ctxt;
+ __entry->subctxt = subctxt;
+ __entry->req = req;
+ __entry->sde = sde;
+ __entry->idx = ahgidx;
+ __entry->len = len;
+ __entry->tidval = tidval;
+ memcpy(__entry->ahg, ahg, len * sizeof(u32));
+ ),
+ TP_printk("[%s:%u:%u:%u] (SDE%u/AHG%u) ahg[0-%d]=(%s) TIDVal=0x%x",
+ __get_str(dev),
+ __entry->ctxt,
+ __entry->subctxt,
+ __entry->req,
+ __entry->sde,
+ __entry->idx,
+ __entry->len - 1,
+ __print_u32_hex(__entry->ahg, __entry->len),
+ __entry->tidval
+ )
+ );
+
+TRACE_EVENT(hfi1_sdma_state,
+ TP_PROTO(
+ struct sdma_engine *sde,
+ const char *cstate,
+ const char *nstate
+ ),
+ TP_ARGS(sde, cstate, nstate),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(sde->dd)
+ __string(curstate, cstate)
+ __string(newstate, nstate)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(sde->dd);
+ __assign_str(curstate, cstate);
+ __assign_str(newstate, nstate);
+ ),
+ TP_printk("[%s] current state %s new state %s",
+ __get_str(dev),
+ __get_str(curstate),
+ __get_str(newstate)
+ )
+);
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_rc
+
+DECLARE_EVENT_CLASS(hfi1_sdma_rc,
+ TP_PROTO(struct hfi1_qp *qp, u32 psn),
+ TP_ARGS(qp, psn),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd_from_ibdev(qp->ibqp.device))
+ __field(u32, qpn)
+ __field(u32, flags)
+ __field(u32, psn)
+ __field(u32, sending_psn)
+ __field(u32, sending_hpsn)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd_from_ibdev(qp->ibqp.device))
+ __entry->qpn = qp->ibqp.qp_num;
+ __entry->flags = qp->s_flags;
+ __entry->psn = psn;
+ __entry->sending_psn = qp->s_sending_psn;
+ __entry->sending_hpsn = qp->s_sending_hpsn;
+ ),
+ TP_printk(
+ "[%s] qpn 0x%x flags 0x%x psn 0x%x sending_psn 0x%x sending_hpsn 0x%x",
+ __get_str(dev),
+ __entry->qpn,
+ __entry->flags,
+ __entry->psn,
+ __entry->sending_psn,
+ __entry->sending_psn
+ )
+);
+
+DEFINE_EVENT(hfi1_sdma_rc, hfi1_rc_sendcomplete,
+ TP_PROTO(struct hfi1_qp *qp, u32 psn),
+ TP_ARGS(qp, psn)
+);
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_misc
+
+TRACE_EVENT(hfi1_interrupt,
+ TP_PROTO(struct hfi1_devdata *dd, const struct is_table *is_entry,
+ int src),
+ TP_ARGS(dd, is_entry, src),
+ TP_STRUCT__entry(
+ DD_DEV_ENTRY(dd)
+ __array(char, buf, 64)
+ __field(int, src)
+ ),
+ TP_fast_assign(
+ DD_DEV_ASSIGN(dd)
+ is_entry->is_name(__entry->buf, 64, src - is_entry->start);
+ __entry->src = src;
+ ),
+ TP_printk("[%s] source: %s [%d]", __get_str(dev), __entry->buf,
+ __entry->src)
+);
+
+/*
+ * Note:
+ * This produces a REALLY ugly trace in the console output when the string is
+ * too long.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hfi1_trace
+
+#define MAX_MSG_LEN 512
+
+DECLARE_EVENT_CLASS(hfi1_trace_template,
+ TP_PROTO(const char *function, struct va_format *vaf),
+ TP_ARGS(function, vaf),
+ TP_STRUCT__entry(
+ __string(function, function)
+ __dynamic_array(char, msg, MAX_MSG_LEN)
+ ),
+ TP_fast_assign(
+ __assign_str(function, function);
+ WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
+ MAX_MSG_LEN, vaf->fmt,
+ *vaf->va) >= MAX_MSG_LEN);
+ ),
+ TP_printk("(%s) %s",
+ __get_str(function),
+ __get_str(msg))
+);
+
+/*
+ * It may be nice to macroize the __hfi1_trace but the va_* stuff requires an
+ * actual function to work and can not be in a macro.
+ */
+#define __hfi1_trace_def(lvl) \
+void __hfi1_trace_##lvl(const char *funct, char *fmt, ...); \
+ \
+DEFINE_EVENT(hfi1_trace_template, hfi1_ ##lvl, \
+ TP_PROTO(const char *function, struct va_format *vaf), \
+ TP_ARGS(function, vaf))
+
+#define __hfi1_trace_fn(lvl) \
+void __hfi1_trace_##lvl(const char *func, char *fmt, ...) \
+{ \
+ struct va_format vaf = { \
+ .fmt = fmt, \
+ }; \
+ va_list args; \
+ \
+ va_start(args, fmt); \
+ vaf.va = &args; \
+ trace_hfi1_ ##lvl(func, &vaf); \
+ va_end(args); \
+ return; \
+}
+
+/*
+ * To create a new trace level simply define it below and as a __hfi1_trace_fn
+ * in trace.c. This will create all the hooks for calling
+ * hfi1_cdbg(LVL, fmt, ...); as well as take care of all
+ * the debugfs stuff.
+ */
+__hfi1_trace_def(PKT);
+__hfi1_trace_def(PROC);
+__hfi1_trace_def(SDMA);
+__hfi1_trace_def(LINKVERB);
+__hfi1_trace_def(DEBUG);
+__hfi1_trace_def(SNOOP);
+__hfi1_trace_def(CNTR);
+__hfi1_trace_def(PIO);
+__hfi1_trace_def(DC8051);
+__hfi1_trace_def(FIRMWARE);
+__hfi1_trace_def(RCVCTRL);
+__hfi1_trace_def(TID);
+
+#define hfi1_cdbg(which, fmt, ...) \
+ __hfi1_trace_##which(__func__, fmt, ##__VA_ARGS__)
+
+#define hfi1_dbg(fmt, ...) \
+ hfi1_cdbg(DEBUG, fmt, ##__VA_ARGS__)
+
+/*
+ * Define HFI1_EARLY_DBG at compile time or here to enable early trace
+ * messages. Do not check in an enablement for this.
+ */
+
+#ifdef HFI1_EARLY_DBG
+#define hfi1_dbg_early(fmt, ...) \
+ trace_printk(fmt, ##__VA_ARGS__)
+#else
+#define hfi1_dbg_early(fmt, ...)
+#endif
+
+#endif /* __HFI1_TRACE_H */
+
+#undef TRACE_INCLUDE_PATH
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_FILE trace
+#include <trace/define_trace.h>
diff --git a/drivers/staging/rdma/hfi1/twsi.c b/drivers/staging/rdma/hfi1/twsi.c
new file mode 100644
index 0000000..ea54fd2
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/twsi.c
@@ -0,0 +1,518 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/vmalloc.h>
+
+#include "hfi.h"
+#include "twsi.h"
+
+/*
+ * "Two Wire Serial Interface" support.
+ *
+ * Originally written for a not-quite-i2c serial eeprom, which is
+ * still used on some supported boards. Later boards have added a
+ * variety of other uses, most board-specific, so the bit-boffing
+ * part has been split off to this file, while the other parts
+ * have been moved to chip-specific files.
+ *
+ * We have also dropped all pretense of fully generic (e.g. pretend
+ * we don't know whether '1' is the higher voltage) interface, as
+ * the restrictions of the generic i2c interface (e.g. no access from
+ * driver itself) make it unsuitable for this use.
+ */
+
+#define READ_CMD 1
+#define WRITE_CMD 0
+
+/**
+ * i2c_wait_for_writes - wait for a write
+ * @dd: the hfi1_ib device
+ *
+ * We use this instead of udelay directly, so we can make sure
+ * that previous register writes have been flushed all the way
+ * to the chip. Since we are delaying anyway, the cost doesn't
+ * hurt, and makes the bit twiddling more regular
+ */
+static void i2c_wait_for_writes(struct hfi1_devdata *dd, u32 target)
+{
+ /*
+ * implicit read of EXTStatus is as good as explicit
+ * read of scratch, if all we want to do is flush
+ * writes.
+ */
+ hfi1_gpio_mod(dd, target, 0, 0, 0);
+ rmb(); /* inlined, so prevent compiler reordering */
+}
+
+/*
+ * QSFP modules are allowed to hold SCL low for 500uSec. Allow twice that
+ * for "almost compliant" modules
+ */
+#define SCL_WAIT_USEC 1000
+
+/* BUF_WAIT is time bus must be free between STOP or ACK and to next START.
+ * Should be 20, but some chips need more.
+ */
+#define TWSI_BUF_WAIT_USEC 60
+
+static void scl_out(struct hfi1_devdata *dd, u32 target, u8 bit)
+{
+ u32 mask;
+
+ udelay(1);
+
+ mask = QSFP_HFI0_I2CCLK;
+
+ /* SCL is meant to be bare-drain, so never set "OUT", just DIR */
+ hfi1_gpio_mod(dd, target, 0, bit ? 0 : mask, mask);
+
+ /*
+ * Allow for slow slaves by simple
+ * delay for falling edge, sampling on rise.
+ */
+ if (!bit)
+ udelay(2);
+ else {
+ int rise_usec;
+
+ for (rise_usec = SCL_WAIT_USEC; rise_usec > 0; rise_usec -= 2) {
+ if (mask & hfi1_gpio_mod(dd, target, 0, 0, 0))
+ break;
+ udelay(2);
+ }
+ if (rise_usec <= 0)
+ dd_dev_err(dd, "SCL interface stuck low > %d uSec\n",
+ SCL_WAIT_USEC);
+ }
+ i2c_wait_for_writes(dd, target);
+}
+
+static void sda_out(struct hfi1_devdata *dd, u32 target, u8 bit)
+{
+ u32 mask;
+
+ mask = QSFP_HFI0_I2CDAT;
+
+ /* SDA is meant to be bare-drain, so never set "OUT", just DIR */
+ hfi1_gpio_mod(dd, target, 0, bit ? 0 : mask, mask);
+
+ i2c_wait_for_writes(dd, target);
+ udelay(2);
+}
+
+static u8 sda_in(struct hfi1_devdata *dd, u32 target, int wait)
+{
+ u32 read_val, mask;
+
+ mask = QSFP_HFI0_I2CDAT;
+ /* SDA is meant to be bare-drain, so never set "OUT", just DIR */
+ hfi1_gpio_mod(dd, target, 0, 0, mask);
+ read_val = hfi1_gpio_mod(dd, target, 0, 0, 0);
+ if (wait)
+ i2c_wait_for_writes(dd, target);
+ return (read_val & mask) >> GPIO_SDA_NUM;
+}
+
+/**
+ * i2c_ackrcv - see if ack following write is true
+ * @dd: the hfi1_ib device
+ */
+static int i2c_ackrcv(struct hfi1_devdata *dd, u32 target)
+{
+ u8 ack_received;
+
+ /* AT ENTRY SCL = LOW */
+ /* change direction, ignore data */
+ ack_received = sda_in(dd, target, 1);
+ scl_out(dd, target, 1);
+ ack_received = sda_in(dd, target, 1) == 0;
+ scl_out(dd, target, 0);
+ return ack_received;
+}
+
+static void stop_cmd(struct hfi1_devdata *dd, u32 target);
+
+/**
+ * rd_byte - read a byte, sending STOP on last, else ACK
+ * @dd: the hfi1_ib device
+ *
+ * Returns byte shifted out of device
+ */
+static int rd_byte(struct hfi1_devdata *dd, u32 target, int last)
+{
+ int bit_cntr, data;
+
+ data = 0;
+
+ for (bit_cntr = 7; bit_cntr >= 0; --bit_cntr) {
+ data <<= 1;
+ scl_out(dd, target, 1);
+ data |= sda_in(dd, target, 0);
+ scl_out(dd, target, 0);
+ }
+ if (last) {
+ scl_out(dd, target, 1);
+ stop_cmd(dd, target);
+ } else {
+ sda_out(dd, target, 0);
+ scl_out(dd, target, 1);
+ scl_out(dd, target, 0);
+ sda_out(dd, target, 1);
+ }
+ return data;
+}
+
+/**
+ * wr_byte - write a byte, one bit at a time
+ * @dd: the hfi1_ib device
+ * @data: the byte to write
+ *
+ * Returns 0 if we got the following ack, otherwise 1
+ */
+static int wr_byte(struct hfi1_devdata *dd, u32 target, u8 data)
+{
+ int bit_cntr;
+ u8 bit;
+
+ for (bit_cntr = 7; bit_cntr >= 0; bit_cntr--) {
+ bit = (data >> bit_cntr) & 1;
+ sda_out(dd, target, bit);
+ scl_out(dd, target, 1);
+ scl_out(dd, target, 0);
+ }
+ return (!i2c_ackrcv(dd, target)) ? 1 : 0;
+}
+
+/*
+ * issue TWSI start sequence:
+ * (both clock/data high, clock high, data low while clock is high)
+ */
+static void start_seq(struct hfi1_devdata *dd, u32 target)
+{
+ sda_out(dd, target, 1);
+ scl_out(dd, target, 1);
+ sda_out(dd, target, 0);
+ udelay(1);
+ scl_out(dd, target, 0);
+}
+
+/**
+ * stop_seq - transmit the stop sequence
+ * @dd: the hfi1_ib device
+ *
+ * (both clock/data low, clock high, data high while clock is high)
+ */
+static void stop_seq(struct hfi1_devdata *dd, u32 target)
+{
+ scl_out(dd, target, 0);
+ sda_out(dd, target, 0);
+ scl_out(dd, target, 1);
+ sda_out(dd, target, 1);
+}
+
+/**
+ * stop_cmd - transmit the stop condition
+ * @dd: the hfi1_ib device
+ *
+ * (both clock/data low, clock high, data high while clock is high)
+ */
+static void stop_cmd(struct hfi1_devdata *dd, u32 target)
+{
+ stop_seq(dd, target);
+ udelay(TWSI_BUF_WAIT_USEC);
+}
+
+/**
+ * hfi1_twsi_reset - reset I2C communication
+ * @dd: the hfi1_ib device
+ */
+
+int hfi1_twsi_reset(struct hfi1_devdata *dd, u32 target)
+{
+ int clock_cycles_left = 9;
+ int was_high = 0;
+ u32 pins, mask;
+
+ /* Both SCL and SDA should be high. If not, there
+ * is something wrong.
+ */
+ mask = QSFP_HFI0_I2CCLK | QSFP_HFI0_I2CDAT;
+
+ /*
+ * Force pins to desired innocuous state.
+ * This is the default power-on state with out=0 and dir=0,
+ * So tri-stated and should be floating high (barring HW problems)
+ */
+ hfi1_gpio_mod(dd, target, 0, 0, mask);
+
+ /*
+ * Clock nine times to get all listeners into a sane state.
+ * If SDA does not go high at any point, we are wedged.
+ * One vendor recommends then issuing START followed by STOP.
+ * we cannot use our "normal" functions to do that, because
+ * if SCL drops between them, another vendor's part will
+ * wedge, dropping SDA and keeping it low forever, at the end of
+ * the next transaction (even if it was not the device addressed).
+ * So our START and STOP take place with SCL held high.
+ */
+ while (clock_cycles_left--) {
+ scl_out(dd, target, 0);
+ scl_out(dd, target, 1);
+ /* Note if SDA is high, but keep clocking to sync slave */
+ was_high |= sda_in(dd, target, 0);
+ }
+
+ if (was_high) {
+ /*
+ * We saw a high, which we hope means the slave is sync'd.
+ * Issue START, STOP, pause for T_BUF.
+ */
+
+ pins = hfi1_gpio_mod(dd, target, 0, 0, 0);
+ if ((pins & mask) != mask)
+ dd_dev_err(dd, "GPIO pins not at rest: %d\n",
+ pins & mask);
+ /* Drop SDA to issue START */
+ udelay(1); /* Guarantee .6 uSec setup */
+ sda_out(dd, target, 0);
+ udelay(1); /* Guarantee .6 uSec hold */
+ /* At this point, SCL is high, SDA low. Raise SDA for STOP */
+ sda_out(dd, target, 1);
+ udelay(TWSI_BUF_WAIT_USEC);
+ }
+
+ return !was_high;
+}
+
+#define HFI1_TWSI_START 0x100
+#define HFI1_TWSI_STOP 0x200
+
+/* Write byte to TWSI, optionally prefixed with START or suffixed with
+ * STOP.
+ * returns 0 if OK (ACK received), else != 0
+ */
+static int twsi_wr(struct hfi1_devdata *dd, u32 target, int data, int flags)
+{
+ int ret = 1;
+
+ if (flags & HFI1_TWSI_START)
+ start_seq(dd, target);
+
+ /* Leaves SCL low (from i2c_ackrcv()) */
+ ret = wr_byte(dd, target, data);
+
+ if (flags & HFI1_TWSI_STOP)
+ stop_cmd(dd, target);
+ return ret;
+}
+
+/* Added functionality for IBA7220-based cards */
+#define HFI1_TEMP_DEV 0x98
+
+/*
+ * hfi1_twsi_blk_rd
+ * General interface for data transfer from twsi devices.
+ * One vestige of its former role is that it recognizes a device
+ * HFI1_TWSI_NO_DEV and does the correct operation for the legacy part,
+ * which responded to all TWSI device codes, interpreting them as
+ * address within device. On all other devices found on board handled by
+ * this driver, the device is followed by a one-byte "address" which selects
+ * the "register" or "offset" within the device from which data should
+ * be read.
+ */
+int hfi1_twsi_blk_rd(struct hfi1_devdata *dd, u32 target, int dev, int addr,
+ void *buffer, int len)
+{
+ int ret;
+ u8 *bp = buffer;
+
+ ret = 1;
+
+ if (dev == HFI1_TWSI_NO_DEV) {
+ /* legacy not-really-I2C */
+ addr = (addr << 1) | READ_CMD;
+ ret = twsi_wr(dd, target, addr, HFI1_TWSI_START);
+ } else {
+ /* Actual I2C */
+ ret = twsi_wr(dd, target, dev | WRITE_CMD, HFI1_TWSI_START);
+ if (ret) {
+ stop_cmd(dd, target);
+ ret = 1;
+ goto bail;
+ }
+ /*
+ * SFF spec claims we do _not_ stop after the addr
+ * but simply issue a start with the "read" dev-addr.
+ * Since we are implicitly waiting for ACK here,
+ * we need t_buf (nominally 20uSec) before that start,
+ * and cannot rely on the delay built in to the STOP
+ */
+ ret = twsi_wr(dd, target, addr, 0);
+ udelay(TWSI_BUF_WAIT_USEC);
+
+ if (ret) {
+ dd_dev_err(dd,
+ "Failed to write interface read addr %02X\n",
+ addr);
+ ret = 1;
+ goto bail;
+ }
+ ret = twsi_wr(dd, target, dev | READ_CMD, HFI1_TWSI_START);
+ }
+ if (ret) {
+ stop_cmd(dd, target);
+ ret = 1;
+ goto bail;
+ }
+
+ /*
+ * block devices keeps clocking data out as long as we ack,
+ * automatically incrementing the address. Some have "pages"
+ * whose boundaries will not be crossed, but the handling
+ * of these is left to the caller, who is in a better
+ * position to know.
+ */
+ while (len-- > 0) {
+ /*
+ * Get and store data, sending ACK if length remaining,
+ * else STOP
+ */
+ *bp++ = rd_byte(dd, target, !len);
+ }
+
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+/*
+ * hfi1_twsi_blk_wr
+ * General interface for data transfer to twsi devices.
+ * One vestige of its former role is that it recognizes a device
+ * HFI1_TWSI_NO_DEV and does the correct operation for the legacy part,
+ * which responded to all TWSI device codes, interpreting them as
+ * address within device. On all other devices found on board handled by
+ * this driver, the device is followed by a one-byte "address" which selects
+ * the "register" or "offset" within the device to which data should
+ * be written.
+ */
+int hfi1_twsi_blk_wr(struct hfi1_devdata *dd, u32 target, int dev, int addr,
+ const void *buffer, int len)
+{
+ int sub_len;
+ const u8 *bp = buffer;
+ int max_wait_time, i;
+ int ret = 1;
+
+ while (len > 0) {
+ if (dev == HFI1_TWSI_NO_DEV) {
+ if (twsi_wr(dd, target, (addr << 1) | WRITE_CMD,
+ HFI1_TWSI_START)) {
+ goto failed_write;
+ }
+ } else {
+ /* Real I2C */
+ if (twsi_wr(dd, target,
+ dev | WRITE_CMD, HFI1_TWSI_START))
+ goto failed_write;
+ ret = twsi_wr(dd, target, addr, 0);
+ if (ret) {
+ dd_dev_err(dd,
+ "Failed to write interface write addr %02X\n",
+ addr);
+ goto failed_write;
+ }
+ }
+
+ sub_len = min(len, 4);
+ addr += sub_len;
+ len -= sub_len;
+
+ for (i = 0; i < sub_len; i++)
+ if (twsi_wr(dd, target, *bp++, 0))
+ goto failed_write;
+
+ stop_cmd(dd, target);
+
+ /*
+ * Wait for write complete by waiting for a successful
+ * read (the chip replies with a zero after the write
+ * cmd completes, and before it writes to the eeprom.
+ * The startcmd for the read will fail the ack until
+ * the writes have completed. We do this inline to avoid
+ * the debug prints that are in the real read routine
+ * if the startcmd fails.
+ * We also use the proper device address, so it doesn't matter
+ * whether we have real eeprom_dev. Legacy likes any address.
+ */
+ max_wait_time = 100;
+ while (twsi_wr(dd, target,
+ dev | READ_CMD, HFI1_TWSI_START)) {
+ stop_cmd(dd, target);
+ if (!--max_wait_time)
+ goto failed_write;
+ }
+ /* now read (and ignore) the resulting byte */
+ rd_byte(dd, target, 1);
+ }
+
+ ret = 0;
+ goto bail;
+
+failed_write:
+ stop_cmd(dd, target);
+ ret = 1;
+
+bail:
+ return ret;
+}
diff --git a/drivers/staging/rdma/hfi1/twsi.h b/drivers/staging/rdma/hfi1/twsi.h
new file mode 100644
index 0000000..5907e02
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/twsi.h
@@ -0,0 +1,68 @@
+#ifndef _TWSI_H
+#define _TWSI_H
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#define HFI1_TWSI_NO_DEV 0xFF
+
+struct hfi1_devdata;
+
+/* Bit position of SDA pin in ASIC_QSFP* registers */
+#define GPIO_SDA_NUM 1
+
+/* these functions must be called with qsfp_lock held */
+int hfi1_twsi_reset(struct hfi1_devdata *dd, u32 target);
+int hfi1_twsi_blk_rd(struct hfi1_devdata *dd, u32 target, int dev, int addr,
+ void *buffer, int len);
+int hfi1_twsi_blk_wr(struct hfi1_devdata *dd, u32 target, int dev, int addr,
+ const void *buffer, int len);
+
+
+#endif /* _TWSI_H */
diff --git a/drivers/staging/rdma/hfi1/uc.c b/drivers/staging/rdma/hfi1/uc.c
new file mode 100644
index 0000000..b536f39
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/uc.c
@@ -0,0 +1,585 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "hfi.h"
+#include "sdma.h"
+#include "qp.h"
+
+/* cut down ridiculously long IB macro names */
+#define OP(x) IB_OPCODE_UC_##x
+
+/**
+ * hfi1_make_uc_req - construct a request packet (SEND, RDMA write)
+ * @qp: a pointer to the QP
+ *
+ * Return 1 if constructed; otherwise, return 0.
+ */
+int hfi1_make_uc_req(struct hfi1_qp *qp)
+{
+ struct hfi1_other_headers *ohdr;
+ struct hfi1_swqe *wqe;
+ unsigned long flags;
+ u32 hwords = 5;
+ u32 bth0 = 0;
+ u32 len;
+ u32 pmtu = qp->pmtu;
+ int ret = 0;
+ int middle = 0;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_SEND_OK)) {
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_FLUSH_SEND))
+ goto bail;
+ /* We are in the error state, flush the work request. */
+ if (qp->s_last == qp->s_head)
+ goto bail;
+ /* If DMAs are in progress, we can't flush immediately. */
+ if (atomic_read(&qp->s_iowait.sdma_busy)) {
+ qp->s_flags |= HFI1_S_WAIT_DMA;
+ goto bail;
+ }
+ clear_ahg(qp);
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ hfi1_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR);
+ goto done;
+ }
+
+ ohdr = &qp->s_hdr->ibh.u.oth;
+ if (qp->remote_ah_attr.ah_flags & IB_AH_GRH)
+ ohdr = &qp->s_hdr->ibh.u.l.oth;
+
+ /* Get the next send request. */
+ wqe = get_swqe_ptr(qp, qp->s_cur);
+ qp->s_wqe = NULL;
+ switch (qp->s_state) {
+ default:
+ if (!(ib_hfi1_state_ops[qp->state] &
+ HFI1_PROCESS_NEXT_SEND_OK))
+ goto bail;
+ /* Check if send work queue is empty. */
+ if (qp->s_cur == qp->s_head) {
+ clear_ahg(qp);
+ goto bail;
+ }
+ /*
+ * Start a new request.
+ */
+ wqe->psn = qp->s_next_psn;
+ qp->s_psn = qp->s_next_psn;
+ qp->s_sge.sge = wqe->sg_list[0];
+ qp->s_sge.sg_list = wqe->sg_list + 1;
+ qp->s_sge.num_sge = wqe->wr.num_sge;
+ qp->s_sge.total_len = wqe->length;
+ len = wqe->length;
+ qp->s_len = len;
+ switch (wqe->wr.opcode) {
+ case IB_WR_SEND:
+ case IB_WR_SEND_WITH_IMM:
+ if (len > pmtu) {
+ qp->s_state = OP(SEND_FIRST);
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_SEND)
+ qp->s_state = OP(SEND_ONLY);
+ else {
+ qp->s_state =
+ OP(SEND_ONLY_WITH_IMMEDIATE);
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.ex.imm_data;
+ hwords += 1;
+ }
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= IB_BTH_SOLICITED;
+ qp->s_wqe = wqe;
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case IB_WR_RDMA_WRITE:
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ ohdr->u.rc.reth.vaddr =
+ cpu_to_be64(wqe->wr.wr.rdma.remote_addr);
+ ohdr->u.rc.reth.rkey =
+ cpu_to_be32(wqe->wr.wr.rdma.rkey);
+ ohdr->u.rc.reth.length = cpu_to_be32(len);
+ hwords += sizeof(struct ib_reth) / 4;
+ if (len > pmtu) {
+ qp->s_state = OP(RDMA_WRITE_FIRST);
+ len = pmtu;
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE)
+ qp->s_state = OP(RDMA_WRITE_ONLY);
+ else {
+ qp->s_state =
+ OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE);
+ /* Immediate data comes after the RETH */
+ ohdr->u.rc.imm_data = wqe->wr.ex.imm_data;
+ hwords += 1;
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= IB_BTH_SOLICITED;
+ }
+ qp->s_wqe = wqe;
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ default:
+ goto bail;
+ }
+ break;
+
+ case OP(SEND_FIRST):
+ qp->s_state = OP(SEND_MIDDLE);
+ /* FALLTHROUGH */
+ case OP(SEND_MIDDLE):
+ len = qp->s_len;
+ if (len > pmtu) {
+ len = pmtu;
+ middle = HFI1_CAP_IS_KSET(SDMA_AHG);
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_SEND)
+ qp->s_state = OP(SEND_LAST);
+ else {
+ qp->s_state = OP(SEND_LAST_WITH_IMMEDIATE);
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.ex.imm_data;
+ hwords += 1;
+ }
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= IB_BTH_SOLICITED;
+ qp->s_wqe = wqe;
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ break;
+
+ case OP(RDMA_WRITE_FIRST):
+ qp->s_state = OP(RDMA_WRITE_MIDDLE);
+ /* FALLTHROUGH */
+ case OP(RDMA_WRITE_MIDDLE):
+ len = qp->s_len;
+ if (len > pmtu) {
+ len = pmtu;
+ middle = HFI1_CAP_IS_KSET(SDMA_AHG);
+ break;
+ }
+ if (wqe->wr.opcode == IB_WR_RDMA_WRITE)
+ qp->s_state = OP(RDMA_WRITE_LAST);
+ else {
+ qp->s_state =
+ OP(RDMA_WRITE_LAST_WITH_IMMEDIATE);
+ /* Immediate data comes after the BTH */
+ ohdr->u.imm_data = wqe->wr.ex.imm_data;
+ hwords += 1;
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= IB_BTH_SOLICITED;
+ }
+ qp->s_wqe = wqe;
+ if (++qp->s_cur >= qp->s_size)
+ qp->s_cur = 0;
+ break;
+ }
+ qp->s_len -= len;
+ qp->s_hdrwords = hwords;
+ qp->s_cur_sge = &qp->s_sge;
+ qp->s_cur_size = len;
+ hfi1_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24),
+ mask_psn(qp->s_next_psn++), middle);
+done:
+ ret = 1;
+ goto unlock;
+
+bail:
+ qp->s_flags &= ~HFI1_S_BUSY;
+unlock:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return ret;
+}
+
+/**
+ * hfi1_uc_rcv - handle an incoming UC packet
+ * @ibp: the port the packet came in on
+ * @hdr: the header of the packet
+ * @rcv_flags: flags relevant to rcv processing
+ * @data: the packet data
+ * @tlen: the length of the packet
+ * @qp: the QP for this packet.
+ *
+ * This is called from qp_rcv() to process an incoming UC packet
+ * for the given QP.
+ * Called at interrupt level.
+ */
+void hfi1_uc_rcv(struct hfi1_packet *packet)
+{
+ struct hfi1_ibport *ibp = &packet->rcd->ppd->ibport_data;
+ struct hfi1_ib_header *hdr = packet->hdr;
+ u32 rcv_flags = packet->rcv_flags;
+ void *data = packet->ebuf;
+ u32 tlen = packet->tlen;
+ struct hfi1_qp *qp = packet->qp;
+ struct hfi1_other_headers *ohdr = packet->ohdr;
+ u32 opcode;
+ u32 hdrsize = packet->hlen;
+ u32 psn;
+ u32 pad;
+ struct ib_wc wc;
+ u32 pmtu = qp->pmtu;
+ struct ib_reth *reth;
+ int has_grh = rcv_flags & HFI1_HAS_GRH;
+ int ret;
+ u32 bth1;
+ struct ib_grh *grh = NULL;
+
+ opcode = be32_to_cpu(ohdr->bth[0]);
+ if (hfi1_ruc_check_hdr(ibp, hdr, has_grh, qp, opcode))
+ return;
+
+ bth1 = be32_to_cpu(ohdr->bth[1]);
+ if (unlikely(bth1 & (HFI1_BECN_SMASK | HFI1_FECN_SMASK))) {
+ if (bth1 & HFI1_BECN_SMASK) {
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u32 rqpn, lqpn;
+ u16 rlid = be16_to_cpu(hdr->lrh[3]);
+ u8 sl, sc5;
+
+ lqpn = bth1 & HFI1_QPN_MASK;
+ rqpn = qp->remote_qpn;
+
+ sc5 = ibp->sl_to_sc[qp->remote_ah_attr.sl];
+ sl = ibp->sc_to_sl[sc5];
+
+ process_becn(ppd, sl, rlid, lqpn, rqpn,
+ IB_CC_SVCTYPE_UC);
+ }
+
+ if (bth1 & HFI1_FECN_SMASK) {
+ u16 pkey = (u16)be32_to_cpu(ohdr->bth[0]);
+ u16 slid = be16_to_cpu(hdr->lrh[3]);
+ u16 dlid = be16_to_cpu(hdr->lrh[1]);
+ u32 src_qp = qp->remote_qpn;
+ u8 sc5;
+
+ sc5 = ibp->sl_to_sc[qp->remote_ah_attr.sl];
+
+ return_cnp(ibp, qp, src_qp, pkey, dlid, slid, sc5, grh);
+ }
+ }
+
+ psn = be32_to_cpu(ohdr->bth[2]);
+ opcode >>= 24;
+
+ /* Compare the PSN verses the expected PSN. */
+ if (unlikely(cmp_psn(psn, qp->r_psn) != 0)) {
+ /*
+ * Handle a sequence error.
+ * Silently drop any current message.
+ */
+ qp->r_psn = psn;
+inv:
+ if (qp->r_state == OP(SEND_FIRST) ||
+ qp->r_state == OP(SEND_MIDDLE)) {
+ set_bit(HFI1_R_REWIND_SGE, &qp->r_aflags);
+ qp->r_sge.num_sge = 0;
+ } else
+ hfi1_put_ss(&qp->r_sge);
+ qp->r_state = OP(SEND_LAST);
+ switch (opcode) {
+ case OP(SEND_FIRST):
+ case OP(SEND_ONLY):
+ case OP(SEND_ONLY_WITH_IMMEDIATE):
+ goto send_first;
+
+ case OP(RDMA_WRITE_FIRST):
+ case OP(RDMA_WRITE_ONLY):
+ case OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE):
+ goto rdma_first;
+
+ default:
+ goto drop;
+ }
+ }
+
+ /* Check for opcode sequence errors. */
+ switch (qp->r_state) {
+ case OP(SEND_FIRST):
+ case OP(SEND_MIDDLE):
+ if (opcode == OP(SEND_MIDDLE) ||
+ opcode == OP(SEND_LAST) ||
+ opcode == OP(SEND_LAST_WITH_IMMEDIATE))
+ break;
+ goto inv;
+
+ case OP(RDMA_WRITE_FIRST):
+ case OP(RDMA_WRITE_MIDDLE):
+ if (opcode == OP(RDMA_WRITE_MIDDLE) ||
+ opcode == OP(RDMA_WRITE_LAST) ||
+ opcode == OP(RDMA_WRITE_LAST_WITH_IMMEDIATE))
+ break;
+ goto inv;
+
+ default:
+ if (opcode == OP(SEND_FIRST) ||
+ opcode == OP(SEND_ONLY) ||
+ opcode == OP(SEND_ONLY_WITH_IMMEDIATE) ||
+ opcode == OP(RDMA_WRITE_FIRST) ||
+ opcode == OP(RDMA_WRITE_ONLY) ||
+ opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE))
+ break;
+ goto inv;
+ }
+
+ if (qp->state == IB_QPS_RTR && !(qp->r_flags & HFI1_R_COMM_EST))
+ qp_comm_est(qp);
+
+ /* OK, process the packet. */
+ switch (opcode) {
+ case OP(SEND_FIRST):
+ case OP(SEND_ONLY):
+ case OP(SEND_ONLY_WITH_IMMEDIATE):
+send_first:
+ if (test_and_clear_bit(HFI1_R_REWIND_SGE, &qp->r_aflags))
+ qp->r_sge = qp->s_rdma_read_sge;
+ else {
+ ret = hfi1_get_rwqe(qp, 0);
+ if (ret < 0)
+ goto op_err;
+ if (!ret)
+ goto drop;
+ /*
+ * qp->s_rdma_read_sge will be the owner
+ * of the mr references.
+ */
+ qp->s_rdma_read_sge = qp->r_sge;
+ }
+ qp->r_rcv_len = 0;
+ if (opcode == OP(SEND_ONLY))
+ goto no_immediate_data;
+ else if (opcode == OP(SEND_ONLY_WITH_IMMEDIATE))
+ goto send_last_imm;
+ /* FALLTHROUGH */
+ case OP(SEND_MIDDLE):
+ /* Check for invalid length PMTU or posted rwqe len. */
+ if (unlikely(tlen != (hdrsize + pmtu + 4)))
+ goto rewind;
+ qp->r_rcv_len += pmtu;
+ if (unlikely(qp->r_rcv_len > qp->r_len))
+ goto rewind;
+ hfi1_copy_sge(&qp->r_sge, data, pmtu, 0);
+ break;
+
+ case OP(SEND_LAST_WITH_IMMEDIATE):
+send_last_imm:
+ wc.ex.imm_data = ohdr->u.imm_data;
+ wc.wc_flags = IB_WC_WITH_IMM;
+ goto send_last;
+ case OP(SEND_LAST):
+no_immediate_data:
+ wc.ex.imm_data = 0;
+ wc.wc_flags = 0;
+send_last:
+ /* Get the number of bytes the message was padded by. */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ /* Check for invalid length. */
+ /* LAST len should be >= 1 */
+ if (unlikely(tlen < (hdrsize + pad + 4)))
+ goto rewind;
+ /* Don't count the CRC. */
+ tlen -= (hdrsize + pad + 4);
+ wc.byte_len = tlen + qp->r_rcv_len;
+ if (unlikely(wc.byte_len > qp->r_len))
+ goto rewind;
+ wc.opcode = IB_WC_RECV;
+ hfi1_copy_sge(&qp->r_sge, data, tlen, 0);
+ hfi1_put_ss(&qp->s_rdma_read_sge);
+last_imm:
+ wc.wr_id = qp->r_wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.qp = &qp->ibqp;
+ wc.src_qp = qp->remote_qpn;
+ wc.slid = qp->remote_ah_attr.dlid;
+ /*
+ * It seems that IB mandates the presence of an SL in a
+ * work completion only for the UD transport (see section
+ * 11.4.2 of IBTA Vol. 1).
+ *
+ * However, the way the SL is chosen below is consistent
+ * with the way that IB/qib works and is trying avoid
+ * introducing incompatibilities.
+ *
+ * See also OPA Vol. 1, section 9.7.6, and table 9-17.
+ */
+ wc.sl = qp->remote_ah_attr.sl;
+ /* zero fields that are N/A */
+ wc.vendor_err = 0;
+ wc.pkey_index = 0;
+ wc.dlid_path_bits = 0;
+ wc.port_num = 0;
+ /* Signal completion event if the solicited bit is set. */
+ hfi1_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
+ (ohdr->bth[0] &
+ cpu_to_be32(IB_BTH_SOLICITED)) != 0);
+ break;
+
+ case OP(RDMA_WRITE_FIRST):
+ case OP(RDMA_WRITE_ONLY):
+ case OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE): /* consume RWQE */
+rdma_first:
+ if (unlikely(!(qp->qp_access_flags &
+ IB_ACCESS_REMOTE_WRITE))) {
+ goto drop;
+ }
+ reth = &ohdr->u.rc.reth;
+ qp->r_len = be32_to_cpu(reth->length);
+ qp->r_rcv_len = 0;
+ qp->r_sge.sg_list = NULL;
+ if (qp->r_len != 0) {
+ u32 rkey = be32_to_cpu(reth->rkey);
+ u64 vaddr = be64_to_cpu(reth->vaddr);
+ int ok;
+
+ /* Check rkey */
+ ok = hfi1_rkey_ok(qp, &qp->r_sge.sge, qp->r_len,
+ vaddr, rkey, IB_ACCESS_REMOTE_WRITE);
+ if (unlikely(!ok))
+ goto drop;
+ qp->r_sge.num_sge = 1;
+ } else {
+ qp->r_sge.num_sge = 0;
+ qp->r_sge.sge.mr = NULL;
+ qp->r_sge.sge.vaddr = NULL;
+ qp->r_sge.sge.length = 0;
+ qp->r_sge.sge.sge_length = 0;
+ }
+ if (opcode == OP(RDMA_WRITE_ONLY))
+ goto rdma_last;
+ else if (opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE)) {
+ wc.ex.imm_data = ohdr->u.rc.imm_data;
+ goto rdma_last_imm;
+ }
+ /* FALLTHROUGH */
+ case OP(RDMA_WRITE_MIDDLE):
+ /* Check for invalid length PMTU or posted rwqe len. */
+ if (unlikely(tlen != (hdrsize + pmtu + 4)))
+ goto drop;
+ qp->r_rcv_len += pmtu;
+ if (unlikely(qp->r_rcv_len > qp->r_len))
+ goto drop;
+ hfi1_copy_sge(&qp->r_sge, data, pmtu, 1);
+ break;
+
+ case OP(RDMA_WRITE_LAST_WITH_IMMEDIATE):
+ wc.ex.imm_data = ohdr->u.imm_data;
+rdma_last_imm:
+ wc.wc_flags = IB_WC_WITH_IMM;
+
+ /* Get the number of bytes the message was padded by. */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ /* Check for invalid length. */
+ /* LAST len should be >= 1 */
+ if (unlikely(tlen < (hdrsize + pad + 4)))
+ goto drop;
+ /* Don't count the CRC. */
+ tlen -= (hdrsize + pad + 4);
+ if (unlikely(tlen + qp->r_rcv_len != qp->r_len))
+ goto drop;
+ if (test_and_clear_bit(HFI1_R_REWIND_SGE, &qp->r_aflags))
+ hfi1_put_ss(&qp->s_rdma_read_sge);
+ else {
+ ret = hfi1_get_rwqe(qp, 1);
+ if (ret < 0)
+ goto op_err;
+ if (!ret)
+ goto drop;
+ }
+ wc.byte_len = qp->r_len;
+ wc.opcode = IB_WC_RECV_RDMA_WITH_IMM;
+ hfi1_copy_sge(&qp->r_sge, data, tlen, 1);
+ hfi1_put_ss(&qp->r_sge);
+ goto last_imm;
+
+ case OP(RDMA_WRITE_LAST):
+rdma_last:
+ /* Get the number of bytes the message was padded by. */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ /* Check for invalid length. */
+ /* LAST len should be >= 1 */
+ if (unlikely(tlen < (hdrsize + pad + 4)))
+ goto drop;
+ /* Don't count the CRC. */
+ tlen -= (hdrsize + pad + 4);
+ if (unlikely(tlen + qp->r_rcv_len != qp->r_len))
+ goto drop;
+ hfi1_copy_sge(&qp->r_sge, data, tlen, 1);
+ hfi1_put_ss(&qp->r_sge);
+ break;
+
+ default:
+ /* Drop packet for unknown opcodes. */
+ goto drop;
+ }
+ qp->r_psn++;
+ qp->r_state = opcode;
+ return;
+
+rewind:
+ set_bit(HFI1_R_REWIND_SGE, &qp->r_aflags);
+ qp->r_sge.num_sge = 0;
+drop:
+ ibp->n_pkt_drops++;
+ return;
+
+op_err:
+ hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
+ return;
+
+}
diff --git a/drivers/staging/rdma/hfi1/ud.c b/drivers/staging/rdma/hfi1/ud.c
new file mode 100644
index 0000000..d40d1a1
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/ud.c
@@ -0,0 +1,885 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/net.h>
+#include <rdma/ib_smi.h>
+
+#include "hfi.h"
+#include "mad.h"
+#include "qp.h"
+
+/**
+ * ud_loopback - handle send on loopback QPs
+ * @sqp: the sending QP
+ * @swqe: the send work request
+ *
+ * This is called from hfi1_make_ud_req() to forward a WQE addressed
+ * to the same HFI.
+ * Note that the receive interrupt handler may be calling hfi1_ud_rcv()
+ * while this is being called.
+ */
+static void ud_loopback(struct hfi1_qp *sqp, struct hfi1_swqe *swqe)
+{
+ struct hfi1_ibport *ibp = to_iport(sqp->ibqp.device, sqp->port_num);
+ struct hfi1_pportdata *ppd;
+ struct hfi1_qp *qp;
+ struct ib_ah_attr *ah_attr;
+ unsigned long flags;
+ struct hfi1_sge_state ssge;
+ struct hfi1_sge *sge;
+ struct ib_wc wc;
+ u32 length;
+ enum ib_qp_type sqptype, dqptype;
+
+ rcu_read_lock();
+
+ qp = hfi1_lookup_qpn(ibp, swqe->wr.wr.ud.remote_qpn);
+ if (!qp) {
+ ibp->n_pkt_drops++;
+ rcu_read_unlock();
+ return;
+ }
+
+ sqptype = sqp->ibqp.qp_type == IB_QPT_GSI ?
+ IB_QPT_UD : sqp->ibqp.qp_type;
+ dqptype = qp->ibqp.qp_type == IB_QPT_GSI ?
+ IB_QPT_UD : qp->ibqp.qp_type;
+
+ if (dqptype != sqptype ||
+ !(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK)) {
+ ibp->n_pkt_drops++;
+ goto drop;
+ }
+
+ ah_attr = &to_iah(swqe->wr.wr.ud.ah)->attr;
+ ppd = ppd_from_ibp(ibp);
+
+ if (qp->ibqp.qp_num > 1) {
+ u16 pkey;
+ u16 slid;
+ u8 sc5 = ibp->sl_to_sc[ah_attr->sl];
+
+ pkey = hfi1_get_pkey(ibp, sqp->s_pkey_index);
+ slid = ppd->lid | (ah_attr->src_path_bits &
+ ((1 << ppd->lmc) - 1));
+ if (unlikely(ingress_pkey_check(ppd, pkey, sc5,
+ qp->s_pkey_index, slid))) {
+ hfi1_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_PKEY, pkey,
+ ah_attr->sl,
+ sqp->ibqp.qp_num, qp->ibqp.qp_num,
+ cpu_to_be16(slid),
+ cpu_to_be16(ah_attr->dlid));
+ goto drop;
+ }
+ }
+
+ /*
+ * Check that the qkey matches (except for QP0, see 9.6.1.4.1).
+ * Qkeys with the high order bit set mean use the
+ * qkey from the QP context instead of the WR (see 10.2.5).
+ */
+ if (qp->ibqp.qp_num) {
+ u32 qkey;
+
+ qkey = (int)swqe->wr.wr.ud.remote_qkey < 0 ?
+ sqp->qkey : swqe->wr.wr.ud.remote_qkey;
+ if (unlikely(qkey != qp->qkey)) {
+ u16 lid;
+
+ lid = ppd->lid | (ah_attr->src_path_bits &
+ ((1 << ppd->lmc) - 1));
+ hfi1_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_QKEY, qkey,
+ ah_attr->sl,
+ sqp->ibqp.qp_num, qp->ibqp.qp_num,
+ cpu_to_be16(lid),
+ cpu_to_be16(ah_attr->dlid));
+ goto drop;
+ }
+ }
+
+ /*
+ * A GRH is expected to precede the data even if not
+ * present on the wire.
+ */
+ length = swqe->length;
+ memset(&wc, 0, sizeof(wc));
+ wc.byte_len = length + sizeof(struct ib_grh);
+
+ if (swqe->wr.opcode == IB_WR_SEND_WITH_IMM) {
+ wc.wc_flags = IB_WC_WITH_IMM;
+ wc.ex.imm_data = swqe->wr.ex.imm_data;
+ }
+
+ spin_lock_irqsave(&qp->r_lock, flags);
+
+ /*
+ * Get the next work request entry to find where to put the data.
+ */
+ if (qp->r_flags & HFI1_R_REUSE_SGE)
+ qp->r_flags &= ~HFI1_R_REUSE_SGE;
+ else {
+ int ret;
+
+ ret = hfi1_get_rwqe(qp, 0);
+ if (ret < 0) {
+ hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
+ goto bail_unlock;
+ }
+ if (!ret) {
+ if (qp->ibqp.qp_num == 0)
+ ibp->n_vl15_dropped++;
+ goto bail_unlock;
+ }
+ }
+ /* Silently drop packets which are too big. */
+ if (unlikely(wc.byte_len > qp->r_len)) {
+ qp->r_flags |= HFI1_R_REUSE_SGE;
+ ibp->n_pkt_drops++;
+ goto bail_unlock;
+ }
+
+ if (ah_attr->ah_flags & IB_AH_GRH) {
+ hfi1_copy_sge(&qp->r_sge, &ah_attr->grh,
+ sizeof(struct ib_grh), 1);
+ wc.wc_flags |= IB_WC_GRH;
+ } else
+ hfi1_skip_sge(&qp->r_sge, sizeof(struct ib_grh), 1);
+ ssge.sg_list = swqe->sg_list + 1;
+ ssge.sge = *swqe->sg_list;
+ ssge.num_sge = swqe->wr.num_sge;
+ sge = &ssge.sge;
+ while (length) {
+ u32 len = sge->length;
+
+ if (len > length)
+ len = length;
+ if (len > sge->sge_length)
+ len = sge->sge_length;
+ WARN_ON_ONCE(len == 0);
+ hfi1_copy_sge(&qp->r_sge, sge->vaddr, len, 1);
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (--ssge.num_sge)
+ *sge = *ssge.sg_list++;
+ } else if (sge->length == 0 && sge->mr->lkey) {
+ if (++sge->n >= HFI1_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ length -= len;
+ }
+ hfi1_put_ss(&qp->r_sge);
+ if (!test_and_clear_bit(HFI1_R_WRID_VALID, &qp->r_aflags))
+ goto bail_unlock;
+ wc.wr_id = qp->r_wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = IB_WC_RECV;
+ wc.qp = &qp->ibqp;
+ wc.src_qp = sqp->ibqp.qp_num;
+ if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_SMI) {
+ if (sqp->ibqp.qp_type == IB_QPT_GSI ||
+ sqp->ibqp.qp_type == IB_QPT_SMI)
+ wc.pkey_index = swqe->wr.wr.ud.pkey_index;
+ else
+ wc.pkey_index = sqp->s_pkey_index;
+ } else {
+ wc.pkey_index = 0;
+ }
+ wc.slid = ppd->lid | (ah_attr->src_path_bits & ((1 << ppd->lmc) - 1));
+ /* Check for loopback when the port lid is not set */
+ if (wc.slid == 0 && sqp->ibqp.qp_type == IB_QPT_GSI)
+ wc.slid = HFI1_PERMISSIVE_LID;
+ wc.sl = ah_attr->sl;
+ wc.dlid_path_bits = ah_attr->dlid & ((1 << ppd->lmc) - 1);
+ wc.port_num = qp->port_num;
+ /* Signal completion event if the solicited bit is set. */
+ hfi1_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
+ swqe->wr.send_flags & IB_SEND_SOLICITED);
+ ibp->n_loop_pkts++;
+bail_unlock:
+ spin_unlock_irqrestore(&qp->r_lock, flags);
+drop:
+ rcu_read_unlock();
+}
+
+/**
+ * hfi1_make_ud_req - construct a UD request packet
+ * @qp: the QP
+ *
+ * Return 1 if constructed; otherwise, return 0.
+ */
+int hfi1_make_ud_req(struct hfi1_qp *qp)
+{
+ struct hfi1_other_headers *ohdr;
+ struct ib_ah_attr *ah_attr;
+ struct hfi1_pportdata *ppd;
+ struct hfi1_ibport *ibp;
+ struct hfi1_swqe *wqe;
+ unsigned long flags;
+ u32 nwords;
+ u32 extra_bytes;
+ u32 bth0;
+ u16 lrh0;
+ u16 lid;
+ int ret = 0;
+ int next_cur;
+ u8 sc5;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_NEXT_SEND_OK)) {
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_FLUSH_SEND))
+ goto bail;
+ /* We are in the error state, flush the work request. */
+ if (qp->s_last == qp->s_head)
+ goto bail;
+ /* If DMAs are in progress, we can't flush immediately. */
+ if (atomic_read(&qp->s_iowait.sdma_busy)) {
+ qp->s_flags |= HFI1_S_WAIT_DMA;
+ goto bail;
+ }
+ wqe = get_swqe_ptr(qp, qp->s_last);
+ hfi1_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR);
+ goto done;
+ }
+
+ if (qp->s_cur == qp->s_head)
+ goto bail;
+
+ wqe = get_swqe_ptr(qp, qp->s_cur);
+ next_cur = qp->s_cur + 1;
+ if (next_cur >= qp->s_size)
+ next_cur = 0;
+
+ /* Construct the header. */
+ ibp = to_iport(qp->ibqp.device, qp->port_num);
+ ppd = ppd_from_ibp(ibp);
+ ah_attr = &to_iah(wqe->wr.wr.ud.ah)->attr;
+ if (ah_attr->dlid < HFI1_MULTICAST_LID_BASE ||
+ ah_attr->dlid == HFI1_PERMISSIVE_LID) {
+ lid = ah_attr->dlid & ~((1 << ppd->lmc) - 1);
+ if (unlikely(!loopback && (lid == ppd->lid ||
+ (lid == HFI1_PERMISSIVE_LID &&
+ qp->ibqp.qp_type == IB_QPT_GSI)))) {
+ /*
+ * If DMAs are in progress, we can't generate
+ * a completion for the loopback packet since
+ * it would be out of order.
+ * Instead of waiting, we could queue a
+ * zero length descriptor so we get a callback.
+ */
+ if (atomic_read(&qp->s_iowait.sdma_busy)) {
+ qp->s_flags |= HFI1_S_WAIT_DMA;
+ goto bail;
+ }
+ qp->s_cur = next_cur;
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ ud_loopback(qp, wqe);
+ spin_lock_irqsave(&qp->s_lock, flags);
+ hfi1_send_complete(qp, wqe, IB_WC_SUCCESS);
+ goto done;
+ }
+ }
+
+ qp->s_cur = next_cur;
+ extra_bytes = -wqe->length & 3;
+ nwords = (wqe->length + extra_bytes) >> 2;
+
+ /* header size in 32-bit words LRH+BTH+DETH = (8+12+8)/4. */
+ qp->s_hdrwords = 7;
+ qp->s_cur_size = wqe->length;
+ qp->s_cur_sge = &qp->s_sge;
+ qp->s_srate = ah_attr->static_rate;
+ qp->srate_mbps = ib_rate_to_mbps(qp->s_srate);
+ qp->s_wqe = wqe;
+ qp->s_sge.sge = wqe->sg_list[0];
+ qp->s_sge.sg_list = wqe->sg_list + 1;
+ qp->s_sge.num_sge = wqe->wr.num_sge;
+ qp->s_sge.total_len = wqe->length;
+
+ if (ah_attr->ah_flags & IB_AH_GRH) {
+ /* Header size in 32-bit words. */
+ qp->s_hdrwords += hfi1_make_grh(ibp, &qp->s_hdr->ibh.u.l.grh,
+ &ah_attr->grh,
+ qp->s_hdrwords, nwords);
+ lrh0 = HFI1_LRH_GRH;
+ ohdr = &qp->s_hdr->ibh.u.l.oth;
+ /*
+ * Don't worry about sending to locally attached multicast
+ * QPs. It is unspecified by the spec. what happens.
+ */
+ } else {
+ /* Header size in 32-bit words. */
+ lrh0 = HFI1_LRH_BTH;
+ ohdr = &qp->s_hdr->ibh.u.oth;
+ }
+ if (wqe->wr.opcode == IB_WR_SEND_WITH_IMM) {
+ qp->s_hdrwords++;
+ ohdr->u.ud.imm_data = wqe->wr.ex.imm_data;
+ bth0 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE << 24;
+ } else
+ bth0 = IB_OPCODE_UD_SEND_ONLY << 24;
+ sc5 = ibp->sl_to_sc[ah_attr->sl];
+ lrh0 |= (ah_attr->sl & 0xf) << 4;
+ if (qp->ibqp.qp_type == IB_QPT_SMI) {
+ lrh0 |= 0xF000; /* Set VL (see ch. 13.5.3.1) */
+ qp->s_sc = 0xf;
+ } else {
+ lrh0 |= (sc5 & 0xf) << 12;
+ qp->s_sc = sc5;
+ }
+ qp->s_hdr->ibh.lrh[0] = cpu_to_be16(lrh0);
+ qp->s_hdr->ibh.lrh[1] = cpu_to_be16(ah_attr->dlid); /* DEST LID */
+ qp->s_hdr->ibh.lrh[2] =
+ cpu_to_be16(qp->s_hdrwords + nwords + SIZE_OF_CRC);
+ if (ah_attr->dlid == be16_to_cpu(IB_LID_PERMISSIVE))
+ qp->s_hdr->ibh.lrh[3] = IB_LID_PERMISSIVE;
+ else {
+ lid = ppd->lid;
+ if (lid) {
+ lid |= ah_attr->src_path_bits & ((1 << ppd->lmc) - 1);
+ qp->s_hdr->ibh.lrh[3] = cpu_to_be16(lid);
+ } else
+ qp->s_hdr->ibh.lrh[3] = IB_LID_PERMISSIVE;
+ }
+ if (wqe->wr.send_flags & IB_SEND_SOLICITED)
+ bth0 |= IB_BTH_SOLICITED;
+ bth0 |= extra_bytes << 20;
+ if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_SMI)
+ bth0 |= hfi1_get_pkey(ibp, wqe->wr.wr.ud.pkey_index);
+ else
+ bth0 |= hfi1_get_pkey(ibp, qp->s_pkey_index);
+ ohdr->bth[0] = cpu_to_be32(bth0);
+ ohdr->bth[1] = cpu_to_be32(wqe->wr.wr.ud.remote_qpn);
+ ohdr->bth[2] = cpu_to_be32(mask_psn(qp->s_next_psn++));
+ /*
+ * Qkeys with the high order bit set mean use the
+ * qkey from the QP context instead of the WR (see 10.2.5).
+ */
+ ohdr->u.ud.deth[0] = cpu_to_be32((int)wqe->wr.wr.ud.remote_qkey < 0 ?
+ qp->qkey : wqe->wr.wr.ud.remote_qkey);
+ ohdr->u.ud.deth[1] = cpu_to_be32(qp->ibqp.qp_num);
+ /* disarm any ahg */
+ qp->s_hdr->ahgcount = 0;
+ qp->s_hdr->ahgidx = 0;
+ qp->s_hdr->tx_flags = 0;
+ qp->s_hdr->sde = NULL;
+
+done:
+ ret = 1;
+ goto unlock;
+
+bail:
+ qp->s_flags &= ~HFI1_S_BUSY;
+unlock:
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return ret;
+}
+
+/*
+ * Hardware can't check this so we do it here.
+ *
+ * This is a slightly different algorithm than the standard pkey check. It
+ * special cases the management keys and allows for 0x7fff and 0xffff to be in
+ * the table at the same time.
+ *
+ * @returns the index found or -1 if not found
+ */
+int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey)
+{
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ unsigned i;
+
+ if (pkey == FULL_MGMT_P_KEY || pkey == LIM_MGMT_P_KEY) {
+ unsigned lim_idx = -1;
+
+ for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i) {
+ /* here we look for an exact match */
+ if (ppd->pkeys[i] == pkey)
+ return i;
+ if (ppd->pkeys[i] == LIM_MGMT_P_KEY)
+ lim_idx = i;
+ }
+
+ /* did not find 0xffff return 0x7fff idx if found */
+ if (pkey == FULL_MGMT_P_KEY)
+ return lim_idx;
+
+ /* no match... */
+ return -1;
+ }
+
+ pkey &= 0x7fff; /* remove limited/full membership bit */
+
+ for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i)
+ if ((ppd->pkeys[i] & 0x7fff) == pkey)
+ return i;
+
+ /*
+ * Should not get here, this means hardware failed to validate pkeys.
+ */
+ return -1;
+}
+
+void return_cnp(struct hfi1_ibport *ibp, struct hfi1_qp *qp, u32 remote_qpn,
+ u32 pkey, u32 slid, u32 dlid, u8 sc5,
+ const struct ib_grh *old_grh)
+{
+ u64 pbc, pbc_flags = 0;
+ u32 bth0, plen, vl, hwords = 5;
+ u16 lrh0;
+ u8 sl = ibp->sc_to_sl[sc5];
+ struct hfi1_ib_header hdr;
+ struct hfi1_other_headers *ohdr;
+ struct pio_buf *pbuf;
+ struct send_context *ctxt = qp_to_send_context(qp, sc5);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+
+ if (old_grh) {
+ struct ib_grh *grh = &hdr.u.l.grh;
+
+ grh->version_tclass_flow = old_grh->version_tclass_flow;
+ grh->paylen = cpu_to_be16((hwords - 2 + SIZE_OF_CRC) << 2);
+ grh->hop_limit = 0xff;
+ grh->sgid = old_grh->dgid;
+ grh->dgid = old_grh->sgid;
+ ohdr = &hdr.u.l.oth;
+ lrh0 = HFI1_LRH_GRH;
+ hwords += sizeof(struct ib_grh) / sizeof(u32);
+ } else {
+ ohdr = &hdr.u.oth;
+ lrh0 = HFI1_LRH_BTH;
+ }
+
+ lrh0 |= (sc5 & 0xf) << 12 | sl << 4;
+
+ bth0 = pkey | (IB_OPCODE_CNP << 24);
+ ohdr->bth[0] = cpu_to_be32(bth0);
+
+ ohdr->bth[1] = cpu_to_be32(remote_qpn | (1 << HFI1_BECN_SHIFT));
+ ohdr->bth[2] = 0; /* PSN 0 */
+
+ hdr.lrh[0] = cpu_to_be16(lrh0);
+ hdr.lrh[1] = cpu_to_be16(dlid);
+ hdr.lrh[2] = cpu_to_be16(hwords + SIZE_OF_CRC);
+ hdr.lrh[3] = cpu_to_be16(slid);
+
+ plen = 2 /* PBC */ + hwords;
+ pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT;
+ vl = sc_to_vlt(ppd->dd, sc5);
+ pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen);
+ if (ctxt) {
+ pbuf = sc_buffer_alloc(ctxt, plen, NULL, NULL);
+ if (pbuf)
+ ppd->dd->pio_inline_send(ppd->dd, pbuf, pbc,
+ &hdr, hwords);
+ }
+}
+
+/*
+ * opa_smp_check() - Do the regular pkey checking, and the additional
+ * checks for SMPs specified in OPAv1 rev 0.90, section 9.10.26
+ * ("SMA Packet Checks").
+ *
+ * Note that:
+ * - Checks are done using the pkey directly from the packet's BTH,
+ * and specifically _not_ the pkey that we attach to the completion,
+ * which may be different.
+ * - These checks are specifically for "non-local" SMPs (i.e., SMPs
+ * which originated on another node). SMPs which are sent from, and
+ * destined to this node are checked in opa_local_smp_check().
+ *
+ * At the point where opa_smp_check() is called, we know:
+ * - destination QP is QP0
+ *
+ * opa_smp_check() returns 0 if all checks succeed, 1 otherwise.
+ */
+static int opa_smp_check(struct hfi1_ibport *ibp, u16 pkey, u8 sc5,
+ struct hfi1_qp *qp, u16 slid, struct opa_smp *smp)
+{
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+
+ /*
+ * I don't think it's possible for us to get here with sc != 0xf,
+ * but check it to be certain.
+ */
+ if (sc5 != 0xf)
+ return 1;
+
+ if (rcv_pkey_check(ppd, pkey, sc5, slid))
+ return 1;
+
+ /*
+ * At this point we know (and so don't need to check again) that
+ * the pkey is either LIM_MGMT_P_KEY, or FULL_MGMT_P_KEY
+ * (see ingress_pkey_check).
+ */
+ if (smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE &&
+ smp->mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED) {
+ ingress_pkey_table_fail(ppd, pkey, slid);
+ return 1;
+ }
+
+ /*
+ * SMPs fall into one of four (disjoint) categories:
+ * SMA request, SMA response, trap, or trap repress.
+ * Our response depends, in part, on which type of
+ * SMP we're processing.
+ *
+ * If this is not an SMA request, or trap repress:
+ * - accept MAD if the port is running an SM
+ * - pkey == FULL_MGMT_P_KEY =>
+ * reply with unsupported method (i.e., just mark
+ * the smp's status field here, and let it be
+ * processed normally)
+ * - pkey != LIM_MGMT_P_KEY =>
+ * increment port recv constraint errors, drop MAD
+ * If this is an SMA request or trap repress:
+ * - pkey != FULL_MGMT_P_KEY =>
+ * increment port recv constraint errors, drop MAD
+ */
+ switch (smp->method) {
+ case IB_MGMT_METHOD_GET:
+ case IB_MGMT_METHOD_SET:
+ case IB_MGMT_METHOD_REPORT:
+ case IB_MGMT_METHOD_TRAP_REPRESS:
+ if (pkey != FULL_MGMT_P_KEY) {
+ ingress_pkey_table_fail(ppd, pkey, slid);
+ return 1;
+ }
+ break;
+ case IB_MGMT_METHOD_SEND:
+ case IB_MGMT_METHOD_TRAP:
+ case IB_MGMT_METHOD_GET_RESP:
+ case IB_MGMT_METHOD_REPORT_RESP:
+ if (ibp->port_cap_flags & IB_PORT_SM)
+ return 0;
+ if (pkey == FULL_MGMT_P_KEY) {
+ smp->status |= IB_SMP_UNSUP_METHOD;
+ return 0;
+ }
+ if (pkey != LIM_MGMT_P_KEY) {
+ ingress_pkey_table_fail(ppd, pkey, slid);
+ return 1;
+ }
+ break;
+ default:
+ break;
+ }
+ return 0;
+}
+
+
+/**
+ * hfi1_ud_rcv - receive an incoming UD packet
+ * @ibp: the port the packet came in on
+ * @hdr: the packet header
+ * @rcv_flags: flags relevant to rcv processing
+ * @data: the packet data
+ * @tlen: the packet length
+ * @qp: the QP the packet came on
+ *
+ * This is called from qp_rcv() to process an incoming UD packet
+ * for the given QP.
+ * Called at interrupt level.
+ */
+void hfi1_ud_rcv(struct hfi1_packet *packet)
+{
+ struct hfi1_other_headers *ohdr = packet->ohdr;
+ int opcode;
+ u32 hdrsize = packet->hlen;
+ u32 pad;
+ struct ib_wc wc;
+ u32 qkey;
+ u32 src_qp;
+ u16 dlid, pkey;
+ int mgmt_pkey_idx = -1;
+ struct hfi1_ibport *ibp = &packet->rcd->ppd->ibport_data;
+ struct hfi1_ib_header *hdr = packet->hdr;
+ u32 rcv_flags = packet->rcv_flags;
+ void *data = packet->ebuf;
+ u32 tlen = packet->tlen;
+ struct hfi1_qp *qp = packet->qp;
+ bool has_grh = rcv_flags & HFI1_HAS_GRH;
+ bool sc4_bit = has_sc4_bit(packet);
+ u8 sc;
+ u32 bth1;
+ int is_mcast;
+ struct ib_grh *grh = NULL;
+
+ qkey = be32_to_cpu(ohdr->u.ud.deth[0]);
+ src_qp = be32_to_cpu(ohdr->u.ud.deth[1]) & HFI1_QPN_MASK;
+ dlid = be16_to_cpu(hdr->lrh[1]);
+ is_mcast = (dlid > HFI1_MULTICAST_LID_BASE) &&
+ (dlid != HFI1_PERMISSIVE_LID);
+ bth1 = be32_to_cpu(ohdr->bth[1]);
+ if (unlikely(bth1 & HFI1_BECN_SMASK)) {
+ /*
+ * In pre-B0 h/w the CNP_OPCODE is handled via an
+ * error path (errata 291394).
+ */
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u32 lqpn = be32_to_cpu(ohdr->bth[1]) & HFI1_QPN_MASK;
+ u8 sl, sc5;
+
+ sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf;
+ sc5 |= sc4_bit;
+ sl = ibp->sc_to_sl[sc5];
+
+ process_becn(ppd, sl, 0, lqpn, 0, IB_CC_SVCTYPE_UD);
+ }
+
+ /*
+ * The opcode is in the low byte when its in network order
+ * (top byte when in host order).
+ */
+ opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+ opcode &= 0xff;
+
+ pkey = (u16)be32_to_cpu(ohdr->bth[0]);
+
+ if (!is_mcast && (opcode != IB_OPCODE_CNP) && bth1 & HFI1_FECN_SMASK) {
+ u16 slid = be16_to_cpu(hdr->lrh[3]);
+ u8 sc5;
+
+ sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf;
+ sc5 |= sc4_bit;
+
+ return_cnp(ibp, qp, src_qp, pkey, dlid, slid, sc5, grh);
+ }
+ /*
+ * Get the number of bytes the message was padded by
+ * and drop incomplete packets.
+ */
+ pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+ if (unlikely(tlen < (hdrsize + pad + 4)))
+ goto drop;
+
+ tlen -= hdrsize + pad + 4;
+
+ /*
+ * Check that the permissive LID is only used on QP0
+ * and the QKEY matches (see 9.6.1.4.1 and 9.6.1.5.1).
+ */
+ if (qp->ibqp.qp_num) {
+ if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE ||
+ hdr->lrh[3] == IB_LID_PERMISSIVE))
+ goto drop;
+ if (qp->ibqp.qp_num > 1) {
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u16 slid;
+ u8 sc5;
+
+ sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf;
+ sc5 |= sc4_bit;
+
+ slid = be16_to_cpu(hdr->lrh[3]);
+ if (unlikely(rcv_pkey_check(ppd, pkey, sc5, slid))) {
+ /*
+ * Traps will not be sent for packets dropped
+ * by the HW. This is fine, as sending trap
+ * for invalid pkeys is optional according to
+ * IB spec (release 1.3, section 10.9.4)
+ */
+ hfi1_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_PKEY,
+ pkey,
+ (be16_to_cpu(hdr->lrh[0]) >> 4) &
+ 0xF,
+ src_qp, qp->ibqp.qp_num,
+ hdr->lrh[3], hdr->lrh[1]);
+ return;
+ }
+ } else {
+ /* GSI packet */
+ mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey);
+ if (mgmt_pkey_idx < 0)
+ goto drop;
+
+ }
+ if (unlikely(qkey != qp->qkey)) {
+ hfi1_bad_pqkey(ibp, IB_NOTICE_TRAP_BAD_QKEY, qkey,
+ (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF,
+ src_qp, qp->ibqp.qp_num,
+ hdr->lrh[3], hdr->lrh[1]);
+ return;
+ }
+ /* Drop invalid MAD packets (see 13.5.3.1). */
+ if (unlikely(qp->ibqp.qp_num == 1 &&
+ (tlen > 2048 ||
+ (be16_to_cpu(hdr->lrh[0]) >> 12) == 15)))
+ goto drop;
+ } else {
+ /* Received on QP0, and so by definition, this is an SMP */
+ struct opa_smp *smp = (struct opa_smp *)data;
+ u16 slid = be16_to_cpu(hdr->lrh[3]);
+ u8 sc5;
+
+ sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf;
+ sc5 |= sc4_bit;
+
+ if (opa_smp_check(ibp, pkey, sc5, qp, slid, smp))
+ goto drop;
+
+ if (tlen > 2048)
+ goto drop;
+ if ((hdr->lrh[1] == IB_LID_PERMISSIVE ||
+ hdr->lrh[3] == IB_LID_PERMISSIVE) &&
+ smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
+ goto drop;
+
+ /* look up SMI pkey */
+ mgmt_pkey_idx = hfi1_lookup_pkey_idx(ibp, pkey);
+ if (mgmt_pkey_idx < 0)
+ goto drop;
+
+ }
+
+ if (qp->ibqp.qp_num > 1 &&
+ opcode == IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE) {
+ wc.ex.imm_data = ohdr->u.ud.imm_data;
+ wc.wc_flags = IB_WC_WITH_IMM;
+ tlen -= sizeof(u32);
+ } else if (opcode == IB_OPCODE_UD_SEND_ONLY) {
+ wc.ex.imm_data = 0;
+ wc.wc_flags = 0;
+ } else
+ goto drop;
+
+ /*
+ * A GRH is expected to precede the data even if not
+ * present on the wire.
+ */
+ wc.byte_len = tlen + sizeof(struct ib_grh);
+
+ /*
+ * Get the next work request entry to find where to put the data.
+ */
+ if (qp->r_flags & HFI1_R_REUSE_SGE)
+ qp->r_flags &= ~HFI1_R_REUSE_SGE;
+ else {
+ int ret;
+
+ ret = hfi1_get_rwqe(qp, 0);
+ if (ret < 0) {
+ hfi1_rc_error(qp, IB_WC_LOC_QP_OP_ERR);
+ return;
+ }
+ if (!ret) {
+ if (qp->ibqp.qp_num == 0)
+ ibp->n_vl15_dropped++;
+ return;
+ }
+ }
+ /* Silently drop packets which are too big. */
+ if (unlikely(wc.byte_len > qp->r_len)) {
+ qp->r_flags |= HFI1_R_REUSE_SGE;
+ goto drop;
+ }
+ if (has_grh) {
+ hfi1_copy_sge(&qp->r_sge, &hdr->u.l.grh,
+ sizeof(struct ib_grh), 1);
+ wc.wc_flags |= IB_WC_GRH;
+ } else
+ hfi1_skip_sge(&qp->r_sge, sizeof(struct ib_grh), 1);
+ hfi1_copy_sge(&qp->r_sge, data, wc.byte_len - sizeof(struct ib_grh), 1);
+ hfi1_put_ss(&qp->r_sge);
+ if (!test_and_clear_bit(HFI1_R_WRID_VALID, &qp->r_aflags))
+ return;
+ wc.wr_id = qp->r_wr_id;
+ wc.status = IB_WC_SUCCESS;
+ wc.opcode = IB_WC_RECV;
+ wc.vendor_err = 0;
+ wc.qp = &qp->ibqp;
+ wc.src_qp = src_qp;
+
+ if (qp->ibqp.qp_type == IB_QPT_GSI ||
+ qp->ibqp.qp_type == IB_QPT_SMI) {
+ if (mgmt_pkey_idx < 0) {
+ if (net_ratelimit()) {
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ struct hfi1_devdata *dd = ppd->dd;
+
+ dd_dev_err(dd, "QP type %d mgmt_pkey_idx < 0 and packet not dropped???\n",
+ qp->ibqp.qp_type);
+ mgmt_pkey_idx = 0;
+ }
+ }
+ wc.pkey_index = (unsigned)mgmt_pkey_idx;
+ } else
+ wc.pkey_index = 0;
+
+ wc.slid = be16_to_cpu(hdr->lrh[3]);
+ sc = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf;
+ sc |= sc4_bit;
+ wc.sl = ibp->sc_to_sl[sc];
+
+ /*
+ * Save the LMC lower bits if the destination LID is a unicast LID.
+ */
+ wc.dlid_path_bits = dlid >= HFI1_MULTICAST_LID_BASE ? 0 :
+ dlid & ((1 << ppd_from_ibp(ibp)->lmc) - 1);
+ wc.port_num = qp->port_num;
+ /* Signal completion event if the solicited bit is set. */
+ hfi1_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
+ (ohdr->bth[0] &
+ cpu_to_be32(IB_BTH_SOLICITED)) != 0);
+ return;
+
+drop:
+ ibp->n_pkt_drops++;
+}
diff --git a/drivers/staging/rdma/hfi1/user_pages.c b/drivers/staging/rdma/hfi1/user_pages.c
new file mode 100644
index 0000000..9071afb
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/user_pages.c
@@ -0,0 +1,156 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/mm.h>
+#include <linux/device.h>
+
+#include "hfi.h"
+
+static void __hfi1_release_user_pages(struct page **p, size_t num_pages,
+ int dirty)
+{
+ size_t i;
+
+ for (i = 0; i < num_pages; i++) {
+ if (dirty)
+ set_page_dirty_lock(p[i]);
+ put_page(p[i]);
+ }
+}
+
+/*
+ * Call with current->mm->mmap_sem held.
+ */
+static int __hfi1_get_user_pages(unsigned long start_page, size_t num_pages,
+ struct page **p)
+{
+ unsigned long lock_limit;
+ size_t got;
+ int ret;
+
+ lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
+
+ if (num_pages > lock_limit && !capable(CAP_IPC_LOCK)) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ for (got = 0; got < num_pages; got += ret) {
+ ret = get_user_pages(current, current->mm,
+ start_page + got * PAGE_SIZE,
+ num_pages - got, 1, 1,
+ p + got, NULL);
+ if (ret < 0)
+ goto bail_release;
+ }
+
+ current->mm->pinned_vm += num_pages;
+
+ ret = 0;
+ goto bail;
+
+bail_release:
+ __hfi1_release_user_pages(p, got, 0);
+bail:
+ return ret;
+}
+
+/**
+ * hfi1_map_page - a safety wrapper around pci_map_page()
+ *
+ */
+dma_addr_t hfi1_map_page(struct pci_dev *hwdev, struct page *page,
+ unsigned long offset, size_t size, int direction)
+{
+ dma_addr_t phys;
+
+ phys = pci_map_page(hwdev, page, offset, size, direction);
+
+ return phys;
+}
+
+/**
+ * hfi1_get_user_pages - lock user pages into memory
+ * @start_page: the start page
+ * @num_pages: the number of pages
+ * @p: the output page structures
+ *
+ * This function takes a given start page (page aligned user virtual
+ * address) and pins it and the following specified number of pages. For
+ * now, num_pages is always 1, but that will probably change at some point
+ * (because caller is doing expected sends on a single virtually contiguous
+ * buffer, so we can do all pages at once).
+ */
+int hfi1_get_user_pages(unsigned long start_page, size_t num_pages,
+ struct page **p)
+{
+ int ret;
+
+ down_write(¤t->mm->mmap_sem);
+
+ ret = __hfi1_get_user_pages(start_page, num_pages, p);
+
+ up_write(¤t->mm->mmap_sem);
+
+ return ret;
+}
+
+void hfi1_release_user_pages(struct page **p, size_t num_pages)
+{
+ if (current->mm) /* during close after signal, mm can be NULL */
+ down_write(¤t->mm->mmap_sem);
+
+ __hfi1_release_user_pages(p, num_pages, 1);
+
+ if (current->mm) {
+ current->mm->pinned_vm -= num_pages;
+ up_write(¤t->mm->mmap_sem);
+ }
+}
diff --git a/drivers/staging/rdma/hfi1/user_sdma.c b/drivers/staging/rdma/hfi1/user_sdma.c
new file mode 100644
index 0000000..5552661
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/user_sdma.c
@@ -0,0 +1,1444 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/dmapool.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/highmem.h>
+#include <linux/io.h>
+#include <linux/uio.h>
+#include <linux/rbtree.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/mmu_context.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+
+#include "hfi.h"
+#include "sdma.h"
+#include "user_sdma.h"
+#include "sdma.h"
+#include "verbs.h" /* for the headers */
+#include "common.h" /* for struct hfi1_tid_info */
+#include "trace.h"
+
+static uint hfi1_sdma_comp_ring_size = 128;
+module_param_named(sdma_comp_size, hfi1_sdma_comp_ring_size, uint, S_IRUGO);
+MODULE_PARM_DESC(sdma_comp_size, "Size of User SDMA completion ring. Default: 128");
+
+/* The maximum number of Data io vectors per message/request */
+#define MAX_VECTORS_PER_REQ 8
+/*
+ * Maximum number of packet to send from each message/request
+ * before moving to the next one.
+ */
+#define MAX_PKTS_PER_QUEUE 16
+
+#define num_pages(x) (1 + ((((x) - 1) & PAGE_MASK) >> PAGE_SHIFT))
+
+#define req_opcode(x) \
+ (((x) >> HFI1_SDMA_REQ_OPCODE_SHIFT) & HFI1_SDMA_REQ_OPCODE_MASK)
+#define req_version(x) \
+ (((x) >> HFI1_SDMA_REQ_VERSION_SHIFT) & HFI1_SDMA_REQ_OPCODE_MASK)
+#define req_iovcnt(x) \
+ (((x) >> HFI1_SDMA_REQ_IOVCNT_SHIFT) & HFI1_SDMA_REQ_IOVCNT_MASK)
+
+/* Number of BTH.PSN bits used for sequence number in expected rcvs */
+#define BTH_SEQ_MASK 0x7ffull
+
+/*
+ * Define fields in the KDETH header so we can update the header
+ * template.
+ */
+#define KDETH_OFFSET_SHIFT 0
+#define KDETH_OFFSET_MASK 0x7fff
+#define KDETH_OM_SHIFT 15
+#define KDETH_OM_MASK 0x1
+#define KDETH_TID_SHIFT 16
+#define KDETH_TID_MASK 0x3ff
+#define KDETH_TIDCTRL_SHIFT 26
+#define KDETH_TIDCTRL_MASK 0x3
+#define KDETH_INTR_SHIFT 28
+#define KDETH_INTR_MASK 0x1
+#define KDETH_SH_SHIFT 29
+#define KDETH_SH_MASK 0x1
+#define KDETH_HCRC_UPPER_SHIFT 16
+#define KDETH_HCRC_UPPER_MASK 0xff
+#define KDETH_HCRC_LOWER_SHIFT 24
+#define KDETH_HCRC_LOWER_MASK 0xff
+
+#define PBC2LRH(x) ((((x) & 0xfff) << 2) - 4)
+#define LRH2PBC(x) ((((x) >> 2) + 1) & 0xfff)
+
+#define KDETH_GET(val, field) \
+ (((le32_to_cpu((val))) >> KDETH_##field##_SHIFT) & KDETH_##field##_MASK)
+#define KDETH_SET(dw, field, val) do { \
+ u32 dwval = le32_to_cpu(dw); \
+ dwval &= ~(KDETH_##field##_MASK << KDETH_##field##_SHIFT); \
+ dwval |= (((val) & KDETH_##field##_MASK) << \
+ KDETH_##field##_SHIFT); \
+ dw = cpu_to_le32(dwval); \
+ } while (0)
+
+#define AHG_HEADER_SET(arr, idx, dw, bit, width, value) \
+ do { \
+ if ((idx) < ARRAY_SIZE((arr))) \
+ (arr)[(idx++)] = sdma_build_ahg_descriptor( \
+ (__force u16)(value), (dw), (bit), \
+ (width)); \
+ else \
+ return -ERANGE; \
+ } while (0)
+
+/* KDETH OM multipliers and switch over point */
+#define KDETH_OM_SMALL 4
+#define KDETH_OM_LARGE 64
+#define KDETH_OM_MAX_SIZE (1 << ((KDETH_OM_LARGE / KDETH_OM_SMALL) + 1))
+
+/* Last packet in the request */
+#define USER_SDMA_TXREQ_FLAGS_LAST_PKT (1 << 0)
+
+#define SDMA_REQ_IN_USE 0
+#define SDMA_REQ_FOR_THREAD 1
+#define SDMA_REQ_SEND_DONE 2
+#define SDMA_REQ_HAVE_AHG 3
+#define SDMA_REQ_HAS_ERROR 4
+#define SDMA_REQ_DONE_ERROR 5
+
+#define SDMA_PKT_Q_INACTIVE (1 << 0)
+#define SDMA_PKT_Q_ACTIVE (1 << 1)
+#define SDMA_PKT_Q_DEFERRED (1 << 2)
+
+/*
+ * Maximum retry attempts to submit a TX request
+ * before putting the process to sleep.
+ */
+#define MAX_DEFER_RETRY_COUNT 1
+
+static unsigned initial_pkt_count = 8;
+
+#define SDMA_IOWAIT_TIMEOUT 1000 /* in milliseconds */
+
+struct user_sdma_iovec {
+ struct iovec iov;
+ /* number of pages in this vector */
+ unsigned npages;
+ /* array of pinned pages for this vector */
+ struct page **pages;
+ /* offset into the virtual address space of the vector at
+ * which we last left off. */
+ u64 offset;
+};
+
+struct user_sdma_request {
+ struct sdma_req_info info;
+ struct hfi1_user_sdma_pkt_q *pq;
+ struct hfi1_user_sdma_comp_q *cq;
+ /* This is the original header from user space */
+ struct hfi1_pkt_header hdr;
+ /*
+ * Pointer to the SDMA engine for this request.
+ * Since different request could be on different VLs,
+ * each request will need it's own engine pointer.
+ */
+ struct sdma_engine *sde;
+ u8 ahg_idx;
+ u32 ahg[9];
+ /*
+ * KDETH.Offset (Eager) field
+ * We need to remember the initial value so the headers
+ * can be updated properly.
+ */
+ u32 koffset;
+ /*
+ * KDETH.OFFSET (TID) field
+ * The offset can cover multiple packets, depending on the
+ * size of the TID entry.
+ */
+ u32 tidoffset;
+ /*
+ * KDETH.OM
+ * Remember this because the header template always sets it
+ * to 0.
+ */
+ u8 omfactor;
+ /*
+ * pointer to the user's task_struct. We are going to
+ * get a reference to it so we can process io vectors
+ * at a later time.
+ */
+ struct task_struct *user_proc;
+ /*
+ * pointer to the user's mm_struct. We are going to
+ * get a reference to it so it doesn't get freed
+ * since we might not be in process context when we
+ * are processing the iov's.
+ * Using this mm_struct, we can get vma based on the
+ * iov's address (find_vma()).
+ */
+ struct mm_struct *user_mm;
+ /*
+ * We copy the iovs for this request (based on
+ * info.iovcnt). These are only the data vectors
+ */
+ unsigned data_iovs;
+ /* total length of the data in the request */
+ u32 data_len;
+ /* progress index moving along the iovs array */
+ unsigned iov_idx;
+ struct user_sdma_iovec iovs[MAX_VECTORS_PER_REQ];
+ /* number of elements copied to the tids array */
+ u16 n_tids;
+ /* TID array values copied from the tid_iov vector */
+ u32 *tids;
+ u16 tididx;
+ u32 sent;
+ u64 seqnum;
+ spinlock_t list_lock;
+ struct list_head txps;
+ unsigned long flags;
+};
+
+struct user_sdma_txreq {
+ /* Packet header for the txreq */
+ struct hfi1_pkt_header hdr;
+ struct sdma_txreq txreq;
+ struct user_sdma_request *req;
+ struct user_sdma_iovec *iovec1;
+ struct user_sdma_iovec *iovec2;
+ u16 flags;
+ unsigned busycount;
+ u64 seqnum;
+};
+
+#define SDMA_DBG(req, fmt, ...) \
+ hfi1_cdbg(SDMA, "[%u:%u:%u:%u] " fmt, (req)->pq->dd->unit, \
+ (req)->pq->ctxt, (req)->pq->subctxt, (req)->info.comp_idx, \
+ ##__VA_ARGS__)
+#define SDMA_Q_DBG(pq, fmt, ...) \
+ hfi1_cdbg(SDMA, "[%u:%u:%u] " fmt, (pq)->dd->unit, (pq)->ctxt, \
+ (pq)->subctxt, ##__VA_ARGS__)
+
+static int user_sdma_send_pkts(struct user_sdma_request *, unsigned);
+static int num_user_pages(const struct iovec *);
+static void user_sdma_txreq_cb(struct sdma_txreq *, int, int);
+static void user_sdma_free_request(struct user_sdma_request *);
+static int pin_vector_pages(struct user_sdma_request *,
+ struct user_sdma_iovec *);
+static void unpin_vector_pages(struct user_sdma_iovec *);
+static int check_header_template(struct user_sdma_request *,
+ struct hfi1_pkt_header *, u32, u32);
+static int set_txreq_header(struct user_sdma_request *,
+ struct user_sdma_txreq *, u32);
+static int set_txreq_header_ahg(struct user_sdma_request *,
+ struct user_sdma_txreq *, u32);
+static inline void set_comp_state(struct user_sdma_request *,
+ enum hfi1_sdma_comp_state, int);
+static inline u32 set_pkt_bth_psn(__be32, u8, u32);
+static inline u32 get_lrh_len(struct hfi1_pkt_header, u32 len);
+
+static int defer_packet_queue(
+ struct sdma_engine *,
+ struct iowait *,
+ struct sdma_txreq *,
+ unsigned seq);
+static void activate_packet_queue(struct iowait *, int);
+
+static inline int iovec_may_free(struct user_sdma_iovec *iovec,
+ void (*free)(struct user_sdma_iovec *))
+{
+ if (ACCESS_ONCE(iovec->offset) == iovec->iov.iov_len) {
+ free(iovec);
+ return 1;
+ }
+ return 0;
+}
+
+static inline void iovec_set_complete(struct user_sdma_iovec *iovec)
+{
+ iovec->offset = iovec->iov.iov_len;
+}
+
+static int defer_packet_queue(
+ struct sdma_engine *sde,
+ struct iowait *wait,
+ struct sdma_txreq *txreq,
+ unsigned seq)
+{
+ struct hfi1_user_sdma_pkt_q *pq =
+ container_of(wait, struct hfi1_user_sdma_pkt_q, busy);
+ struct hfi1_ibdev *dev = &pq->dd->verbs_dev;
+ struct user_sdma_txreq *tx =
+ container_of(txreq, struct user_sdma_txreq, txreq);
+
+ if (sdma_progress(sde, seq, txreq)) {
+ if (tx->busycount++ < MAX_DEFER_RETRY_COUNT)
+ goto eagain;
+ }
+ /*
+ * We are assuming that if the list is enqueued somewhere, it
+ * is to the dmawait list since that is the only place where
+ * it is supposed to be enqueued.
+ */
+ xchg(&pq->state, SDMA_PKT_Q_DEFERRED);
+ write_seqlock(&dev->iowait_lock);
+ if (list_empty(&pq->busy.list))
+ list_add_tail(&pq->busy.list, &sde->dmawait);
+ write_sequnlock(&dev->iowait_lock);
+ return -EBUSY;
+eagain:
+ return -EAGAIN;
+}
+
+static void activate_packet_queue(struct iowait *wait, int reason)
+{
+ struct hfi1_user_sdma_pkt_q *pq =
+ container_of(wait, struct hfi1_user_sdma_pkt_q, busy);
+ xchg(&pq->state, SDMA_PKT_Q_ACTIVE);
+ wake_up(&wait->wait_dma);
+};
+
+static void sdma_kmem_cache_ctor(void *obj)
+{
+ struct user_sdma_txreq *tx = (struct user_sdma_txreq *)obj;
+
+ memset(tx, 0, sizeof(*tx));
+}
+
+int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *uctxt, struct file *fp)
+{
+ int ret = 0;
+ unsigned memsize;
+ char buf[64];
+ struct hfi1_devdata *dd;
+ struct hfi1_user_sdma_comp_q *cq;
+ struct hfi1_user_sdma_pkt_q *pq;
+ unsigned long flags;
+
+ if (!uctxt || !fp) {
+ ret = -EBADF;
+ goto done;
+ }
+
+ if (!hfi1_sdma_comp_ring_size) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ dd = uctxt->dd;
+
+ pq = kzalloc(sizeof(*pq), GFP_KERNEL);
+ if (!pq) {
+ dd_dev_err(dd,
+ "[%u:%u] Failed to allocate SDMA request struct\n",
+ uctxt->ctxt, subctxt_fp(fp));
+ goto pq_nomem;
+ }
+ memsize = sizeof(*pq->reqs) * hfi1_sdma_comp_ring_size;
+ pq->reqs = kmalloc(memsize, GFP_KERNEL);
+ if (!pq->reqs) {
+ dd_dev_err(dd,
+ "[%u:%u] Failed to allocate SDMA request queue (%u)\n",
+ uctxt->ctxt, subctxt_fp(fp), memsize);
+ goto pq_reqs_nomem;
+ }
+ INIT_LIST_HEAD(&pq->list);
+ pq->dd = dd;
+ pq->ctxt = uctxt->ctxt;
+ pq->subctxt = subctxt_fp(fp);
+ pq->n_max_reqs = hfi1_sdma_comp_ring_size;
+ pq->state = SDMA_PKT_Q_INACTIVE;
+ atomic_set(&pq->n_reqs, 0);
+
+ iowait_init(&pq->busy, 0, NULL, defer_packet_queue,
+ activate_packet_queue);
+ pq->reqidx = 0;
+ snprintf(buf, 64, "txreq-kmem-cache-%u-%u-%u", dd->unit, uctxt->ctxt,
+ subctxt_fp(fp));
+ pq->txreq_cache = kmem_cache_create(buf,
+ sizeof(struct user_sdma_txreq),
+ L1_CACHE_BYTES,
+ SLAB_HWCACHE_ALIGN,
+ sdma_kmem_cache_ctor);
+ if (!pq->txreq_cache) {
+ dd_dev_err(dd, "[%u] Failed to allocate TxReq cache\n",
+ uctxt->ctxt);
+ goto pq_txreq_nomem;
+ }
+ user_sdma_pkt_fp(fp) = pq;
+ cq = kzalloc(sizeof(*cq), GFP_KERNEL);
+ if (!cq) {
+ dd_dev_err(dd,
+ "[%u:%u] Failed to allocate SDMA completion queue\n",
+ uctxt->ctxt, subctxt_fp(fp));
+ goto cq_nomem;
+ }
+
+ memsize = ALIGN(sizeof(*cq->comps) * hfi1_sdma_comp_ring_size,
+ PAGE_SIZE);
+ cq->comps = vmalloc_user(memsize);
+ if (!cq->comps) {
+ dd_dev_err(dd,
+ "[%u:%u] Failed to allocate SDMA completion queue entries\n",
+ uctxt->ctxt, subctxt_fp(fp));
+ goto cq_comps_nomem;
+ }
+ cq->nentries = hfi1_sdma_comp_ring_size;
+ user_sdma_comp_fp(fp) = cq;
+
+ spin_lock_irqsave(&uctxt->sdma_qlock, flags);
+ list_add(&pq->list, &uctxt->sdma_queues);
+ spin_unlock_irqrestore(&uctxt->sdma_qlock, flags);
+ goto done;
+
+cq_comps_nomem:
+ kfree(cq);
+cq_nomem:
+ kmem_cache_destroy(pq->txreq_cache);
+pq_txreq_nomem:
+ kfree(pq->reqs);
+pq_reqs_nomem:
+ kfree(pq);
+ user_sdma_pkt_fp(fp) = NULL;
+pq_nomem:
+ ret = -ENOMEM;
+done:
+ return ret;
+}
+
+int hfi1_user_sdma_free_queues(struct hfi1_filedata *fd)
+{
+ struct hfi1_ctxtdata *uctxt = fd->uctxt;
+ struct hfi1_user_sdma_pkt_q *pq;
+ unsigned long flags;
+
+ hfi1_cdbg(SDMA, "[%u:%u:%u] Freeing user SDMA queues", uctxt->dd->unit,
+ uctxt->ctxt, fd->subctxt);
+ pq = fd->pq;
+ if (pq) {
+ u16 i, j;
+
+ spin_lock_irqsave(&uctxt->sdma_qlock, flags);
+ if (!list_empty(&pq->list))
+ list_del_init(&pq->list);
+ spin_unlock_irqrestore(&uctxt->sdma_qlock, flags);
+ iowait_sdma_drain(&pq->busy);
+ if (pq->reqs) {
+ for (i = 0, j = 0; i < atomic_read(&pq->n_reqs) &&
+ j < pq->n_max_reqs; j++) {
+ struct user_sdma_request *req = &pq->reqs[j];
+
+ if (test_bit(SDMA_REQ_IN_USE, &req->flags)) {
+ set_comp_state(req, ERROR, -ECOMM);
+ user_sdma_free_request(req);
+ i++;
+ }
+ }
+ kfree(pq->reqs);
+ }
+ if (pq->txreq_cache)
+ kmem_cache_destroy(pq->txreq_cache);
+ kfree(pq);
+ fd->pq = NULL;
+ }
+ if (fd->cq) {
+ if (fd->cq->comps)
+ vfree(fd->cq->comps);
+ kfree(fd->cq);
+ fd->cq = NULL;
+ }
+ return 0;
+}
+
+int hfi1_user_sdma_process_request(struct file *fp, struct iovec *iovec,
+ unsigned long dim, unsigned long *count)
+{
+ int ret = 0, i = 0, sent;
+ struct hfi1_ctxtdata *uctxt = ctxt_fp(fp);
+ struct hfi1_user_sdma_pkt_q *pq = user_sdma_pkt_fp(fp);
+ struct hfi1_user_sdma_comp_q *cq = user_sdma_comp_fp(fp);
+ struct hfi1_devdata *dd = pq->dd;
+ unsigned long idx = 0;
+ u8 pcount = initial_pkt_count;
+ struct sdma_req_info info;
+ struct user_sdma_request *req;
+ u8 opcode, sc, vl;
+
+ if (iovec[idx].iov_len < sizeof(info) + sizeof(req->hdr)) {
+ hfi1_cdbg(
+ SDMA,
+ "[%u:%u:%u] First vector not big enough for header %lu/%lu",
+ dd->unit, uctxt->ctxt, subctxt_fp(fp),
+ iovec[idx].iov_len, sizeof(info) + sizeof(req->hdr));
+ ret = -EINVAL;
+ goto done;
+ }
+ ret = copy_from_user(&info, iovec[idx].iov_base, sizeof(info));
+ if (ret) {
+ hfi1_cdbg(SDMA, "[%u:%u:%u] Failed to copy info QW (%d)",
+ dd->unit, uctxt->ctxt, subctxt_fp(fp), ret);
+ ret = -EFAULT;
+ goto done;
+ }
+ trace_hfi1_sdma_user_reqinfo(dd, uctxt->ctxt, subctxt_fp(fp),
+ (u16 *)&info);
+ if (cq->comps[info.comp_idx].status == QUEUED) {
+ hfi1_cdbg(SDMA, "[%u:%u:%u] Entry %u is in QUEUED state",
+ dd->unit, uctxt->ctxt, subctxt_fp(fp),
+ info.comp_idx);
+ ret = -EBADSLT;
+ goto done;
+ }
+ if (!info.fragsize) {
+ hfi1_cdbg(SDMA,
+ "[%u:%u:%u:%u] Request does not specify fragsize",
+ dd->unit, uctxt->ctxt, subctxt_fp(fp), info.comp_idx);
+ ret = -EINVAL;
+ goto done;
+ }
+ /*
+ * We've done all the safety checks that we can up to this point,
+ * "allocate" the request entry.
+ */
+ hfi1_cdbg(SDMA, "[%u:%u:%u] Using req/comp entry %u\n", dd->unit,
+ uctxt->ctxt, subctxt_fp(fp), info.comp_idx);
+ req = pq->reqs + info.comp_idx;
+ memset(req, 0, sizeof(*req));
+ /* Mark the request as IN_USE before we start filling it in. */
+ set_bit(SDMA_REQ_IN_USE, &req->flags);
+ req->data_iovs = req_iovcnt(info.ctrl) - 1;
+ req->pq = pq;
+ req->cq = cq;
+ INIT_LIST_HEAD(&req->txps);
+ spin_lock_init(&req->list_lock);
+ memcpy(&req->info, &info, sizeof(info));
+
+ if (req_opcode(info.ctrl) == EXPECTED)
+ req->data_iovs--;
+
+ if (!info.npkts || req->data_iovs > MAX_VECTORS_PER_REQ) {
+ SDMA_DBG(req, "Too many vectors (%u/%u)", req->data_iovs,
+ MAX_VECTORS_PER_REQ);
+ ret = -EINVAL;
+ goto done;
+ }
+ /* Copy the header from the user buffer */
+ ret = copy_from_user(&req->hdr, iovec[idx].iov_base + sizeof(info),
+ sizeof(req->hdr));
+ if (ret) {
+ SDMA_DBG(req, "Failed to copy header template (%d)", ret);
+ ret = -EFAULT;
+ goto free_req;
+ }
+
+ /* If Static rate control is not enabled, sanitize the header. */
+ if (!HFI1_CAP_IS_USET(STATIC_RATE_CTRL))
+ req->hdr.pbc[2] = 0;
+
+ /* Validate the opcode. Do not trust packets from user space blindly. */
+ opcode = (be32_to_cpu(req->hdr.bth[0]) >> 24) & 0xff;
+ if ((opcode & USER_OPCODE_CHECK_MASK) !=
+ USER_OPCODE_CHECK_VAL) {
+ SDMA_DBG(req, "Invalid opcode (%d)", opcode);
+ ret = -EINVAL;
+ goto free_req;
+ }
+ /*
+ * Validate the vl. Do not trust packets from user space blindly.
+ * VL comes from PBC, SC comes from LRH, and the VL needs to
+ * match the SC look up.
+ */
+ vl = (le16_to_cpu(req->hdr.pbc[0]) >> 12) & 0xF;
+ sc = (((be16_to_cpu(req->hdr.lrh[0]) >> 12) & 0xF) |
+ (((le16_to_cpu(req->hdr.pbc[1]) >> 14) & 0x1) << 4));
+ if (vl >= dd->pport->vls_operational ||
+ vl != sc_to_vlt(dd, sc)) {
+ SDMA_DBG(req, "Invalid SC(%u)/VL(%u)", sc, vl);
+ ret = -EINVAL;
+ goto free_req;
+ }
+
+ /*
+ * Also should check the BTH.lnh. If it says the next header is GRH then
+ * the RXE parsing will be off and will land in the middle of the KDETH
+ * or miss it entirely.
+ */
+ if ((be16_to_cpu(req->hdr.lrh[0]) & 0x3) == HFI1_LRH_GRH) {
+ SDMA_DBG(req, "User tried to pass in a GRH");
+ ret = -EINVAL;
+ goto free_req;
+ }
+
+ req->koffset = le32_to_cpu(req->hdr.kdeth.swdata[6]);
+ /* Calculate the initial TID offset based on the values of
+ KDETH.OFFSET and KDETH.OM that are passed in. */
+ req->tidoffset = KDETH_GET(req->hdr.kdeth.ver_tid_offset, OFFSET) *
+ (KDETH_GET(req->hdr.kdeth.ver_tid_offset, OM) ?
+ KDETH_OM_LARGE : KDETH_OM_SMALL);
+ SDMA_DBG(req, "Initial TID offset %u", req->tidoffset);
+ idx++;
+
+ /* Save all the IO vector structures */
+ while (i < req->data_iovs) {
+ memcpy(&req->iovs[i].iov, iovec + idx++, sizeof(struct iovec));
+ req->iovs[i].offset = 0;
+ req->data_len += req->iovs[i++].iov.iov_len;
+ }
+ SDMA_DBG(req, "total data length %u", req->data_len);
+
+ if (pcount > req->info.npkts)
+ pcount = req->info.npkts;
+ /*
+ * Copy any TID info
+ * User space will provide the TID info only when the
+ * request type is EXPECTED. This is true even if there is
+ * only one packet in the request and the header is already
+ * setup. The reason for the singular TID case is that the
+ * driver needs to perform safety checks.
+ */
+ if (req_opcode(req->info.ctrl) == EXPECTED) {
+ u16 ntids = iovec[idx].iov_len / sizeof(*req->tids);
+
+ if (!ntids || ntids > MAX_TID_PAIR_ENTRIES) {
+ ret = -EINVAL;
+ goto free_req;
+ }
+ req->tids = kcalloc(ntids, sizeof(*req->tids), GFP_KERNEL);
+ if (!req->tids) {
+ ret = -ENOMEM;
+ goto free_req;
+ }
+ /*
+ * We have to copy all of the tids because they may vary
+ * in size and, therefore, the TID count might not be
+ * equal to the pkt count. However, there is no way to
+ * tell at this point.
+ */
+ ret = copy_from_user(req->tids, iovec[idx].iov_base,
+ ntids * sizeof(*req->tids));
+ if (ret) {
+ SDMA_DBG(req, "Failed to copy %d TIDs (%d)",
+ ntids, ret);
+ ret = -EFAULT;
+ goto free_req;
+ }
+ req->n_tids = ntids;
+ idx++;
+ }
+
+ /* Have to select the engine */
+ req->sde = sdma_select_engine_vl(dd,
+ (u32)(uctxt->ctxt + subctxt_fp(fp)),
+ vl);
+ if (!req->sde || !sdma_running(req->sde)) {
+ ret = -ECOMM;
+ goto free_req;
+ }
+
+ /* We don't need an AHG entry if the request contains only one packet */
+ if (req->info.npkts > 1 && HFI1_CAP_IS_USET(SDMA_AHG)) {
+ int ahg = sdma_ahg_alloc(req->sde);
+
+ if (likely(ahg >= 0)) {
+ req->ahg_idx = (u8)ahg;
+ set_bit(SDMA_REQ_HAVE_AHG, &req->flags);
+ }
+ }
+
+ set_comp_state(req, QUEUED, 0);
+ /* Send the first N packets in the request to buy us some time */
+ sent = user_sdma_send_pkts(req, pcount);
+ if (unlikely(sent < 0)) {
+ if (sent != -EBUSY) {
+ ret = sent;
+ goto send_err;
+ } else
+ sent = 0;
+ }
+ atomic_inc(&pq->n_reqs);
+
+ if (sent < req->info.npkts) {
+ /* Take the references to the user's task and mm_struct */
+ get_task_struct(current);
+ req->user_proc = current;
+
+ /*
+ * This is a somewhat blocking send implementation.
+ * The driver will block the caller until all packets of the
+ * request have been submitted to the SDMA engine. However, it
+ * will not wait for send completions.
+ */
+ while (!test_bit(SDMA_REQ_SEND_DONE, &req->flags)) {
+ ret = user_sdma_send_pkts(req, pcount);
+ if (ret < 0) {
+ if (ret != -EBUSY)
+ goto send_err;
+ wait_event_interruptible_timeout(
+ pq->busy.wait_dma,
+ (pq->state == SDMA_PKT_Q_ACTIVE),
+ msecs_to_jiffies(
+ SDMA_IOWAIT_TIMEOUT));
+ }
+ }
+
+ }
+ ret = 0;
+ *count += idx;
+ goto done;
+send_err:
+ set_comp_state(req, ERROR, ret);
+free_req:
+ user_sdma_free_request(req);
+done:
+ return ret;
+}
+
+static inline u32 compute_data_length(struct user_sdma_request *req,
+ struct user_sdma_txreq *tx)
+{
+ /*
+ * Determine the proper size of the packet data.
+ * The size of the data of the first packet is in the header
+ * template. However, it includes the header and ICRC, which need
+ * to be subtracted.
+ * The size of the remaining packets is the minimum of the frag
+ * size (MTU) or remaining data in the request.
+ */
+ u32 len;
+
+ if (!req->seqnum) {
+ len = ((be16_to_cpu(req->hdr.lrh[2]) << 2) -
+ (sizeof(tx->hdr) - 4));
+ } else if (req_opcode(req->info.ctrl) == EXPECTED) {
+ u32 tidlen = EXP_TID_GET(req->tids[req->tididx], LEN) *
+ PAGE_SIZE;
+ /* Get the data length based on the remaining space in the
+ * TID pair. */
+ len = min(tidlen - req->tidoffset, (u32)req->info.fragsize);
+ /* If we've filled up the TID pair, move to the next one. */
+ if (unlikely(!len) && ++req->tididx < req->n_tids &&
+ req->tids[req->tididx]) {
+ tidlen = EXP_TID_GET(req->tids[req->tididx],
+ LEN) * PAGE_SIZE;
+ req->tidoffset = 0;
+ len = min_t(u32, tidlen, req->info.fragsize);
+ }
+ /* Since the TID pairs map entire pages, make sure that we
+ * are not going to try to send more data that we have
+ * remaining. */
+ len = min(len, req->data_len - req->sent);
+ } else
+ len = min(req->data_len - req->sent, (u32)req->info.fragsize);
+ SDMA_DBG(req, "Data Length = %u", len);
+ return len;
+}
+
+static inline u32 get_lrh_len(struct hfi1_pkt_header hdr, u32 len)
+{
+ /* (Size of complete header - size of PBC) + 4B ICRC + data length */
+ return ((sizeof(hdr) - sizeof(hdr.pbc)) + 4 + len);
+}
+
+static int user_sdma_send_pkts(struct user_sdma_request *req, unsigned maxpkts)
+{
+ int ret = 0;
+ unsigned npkts = 0;
+ struct user_sdma_txreq *tx = NULL;
+ struct hfi1_user_sdma_pkt_q *pq = NULL;
+ struct user_sdma_iovec *iovec = NULL;
+
+ if (!req->pq) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ pq = req->pq;
+
+ /*
+ * Check if we might have sent the entire request already
+ */
+ if (unlikely(req->seqnum == req->info.npkts)) {
+ if (!list_empty(&req->txps))
+ goto dosend;
+ goto done;
+ }
+
+ if (!maxpkts || maxpkts > req->info.npkts - req->seqnum)
+ maxpkts = req->info.npkts - req->seqnum;
+
+ while (npkts < maxpkts) {
+ u32 datalen = 0, queued = 0, data_sent = 0;
+ u64 iov_offset = 0;
+
+ /*
+ * Check whether any of the completions have come back
+ * with errors. If so, we are not going to process any
+ * more packets from this request.
+ */
+ if (test_bit(SDMA_REQ_HAS_ERROR, &req->flags)) {
+ set_bit(SDMA_REQ_DONE_ERROR, &req->flags);
+ ret = -EFAULT;
+ goto done;
+ }
+
+ tx = kmem_cache_alloc(pq->txreq_cache, GFP_KERNEL);
+ if (!tx) {
+ ret = -ENOMEM;
+ goto done;
+ }
+ tx->flags = 0;
+ tx->req = req;
+ tx->busycount = 0;
+ tx->iovec1 = NULL;
+ tx->iovec2 = NULL;
+
+ if (req->seqnum == req->info.npkts - 1)
+ tx->flags |= USER_SDMA_TXREQ_FLAGS_LAST_PKT;
+
+ /*
+ * Calculate the payload size - this is min of the fragment
+ * (MTU) size or the remaining bytes in the request but only
+ * if we have payload data.
+ */
+ if (req->data_len) {
+ iovec = &req->iovs[req->iov_idx];
+ if (ACCESS_ONCE(iovec->offset) == iovec->iov.iov_len) {
+ if (++req->iov_idx == req->data_iovs) {
+ ret = -EFAULT;
+ goto free_txreq;
+ }
+ iovec = &req->iovs[req->iov_idx];
+ WARN_ON(iovec->offset);
+ }
+
+ /*
+ * This request might include only a header and no user
+ * data, so pin pages only if there is data and it the
+ * pages have not been pinned already.
+ */
+ if (unlikely(!iovec->pages && iovec->iov.iov_len)) {
+ ret = pin_vector_pages(req, iovec);
+ if (ret)
+ goto free_tx;
+ }
+
+ tx->iovec1 = iovec;
+ datalen = compute_data_length(req, tx);
+ if (!datalen) {
+ SDMA_DBG(req,
+ "Request has data but pkt len is 0");
+ ret = -EFAULT;
+ goto free_tx;
+ }
+ }
+
+ if (test_bit(SDMA_REQ_HAVE_AHG, &req->flags)) {
+ if (!req->seqnum) {
+ u16 pbclen = le16_to_cpu(req->hdr.pbc[0]);
+ u32 lrhlen = get_lrh_len(req->hdr, datalen);
+ /*
+ * Copy the request header into the tx header
+ * because the HW needs a cacheline-aligned
+ * address.
+ * This copy can be optimized out if the hdr
+ * member of user_sdma_request were also
+ * cacheline aligned.
+ */
+ memcpy(&tx->hdr, &req->hdr, sizeof(tx->hdr));
+ if (PBC2LRH(pbclen) != lrhlen) {
+ pbclen = (pbclen & 0xf000) |
+ LRH2PBC(lrhlen);
+ tx->hdr.pbc[0] = cpu_to_le16(pbclen);
+ }
+ ret = sdma_txinit_ahg(&tx->txreq,
+ SDMA_TXREQ_F_AHG_COPY,
+ sizeof(tx->hdr) + datalen,
+ req->ahg_idx, 0, NULL, 0,
+ user_sdma_txreq_cb);
+ if (ret)
+ goto free_tx;
+ ret = sdma_txadd_kvaddr(pq->dd, &tx->txreq,
+ &tx->hdr,
+ sizeof(tx->hdr));
+ if (ret)
+ goto free_txreq;
+ } else {
+ int changes;
+
+ changes = set_txreq_header_ahg(req, tx,
+ datalen);
+ if (changes < 0)
+ goto free_tx;
+ sdma_txinit_ahg(&tx->txreq,
+ SDMA_TXREQ_F_USE_AHG,
+ datalen, req->ahg_idx, changes,
+ req->ahg, sizeof(req->hdr),
+ user_sdma_txreq_cb);
+ }
+ } else {
+ ret = sdma_txinit(&tx->txreq, 0, sizeof(req->hdr) +
+ datalen, user_sdma_txreq_cb);
+ if (ret)
+ goto free_tx;
+ /*
+ * Modify the header for this packet. This only needs
+ * to be done if we are not going to use AHG. Otherwise,
+ * the HW will do it based on the changes we gave it
+ * during sdma_txinit_ahg().
+ */
+ ret = set_txreq_header(req, tx, datalen);
+ if (ret)
+ goto free_txreq;
+ }
+
+ /*
+ * If the request contains any data vectors, add up to
+ * fragsize bytes to the descriptor.
+ */
+ while (queued < datalen &&
+ (req->sent + data_sent) < req->data_len) {
+ unsigned long base, offset;
+ unsigned pageidx, len;
+
+ base = (unsigned long)iovec->iov.iov_base;
+ offset = ((base + iovec->offset + iov_offset) &
+ ~PAGE_MASK);
+ pageidx = (((iovec->offset + iov_offset +
+ base) - (base & PAGE_MASK)) >> PAGE_SHIFT);
+ len = offset + req->info.fragsize > PAGE_SIZE ?
+ PAGE_SIZE - offset : req->info.fragsize;
+ len = min((datalen - queued), len);
+ ret = sdma_txadd_page(pq->dd, &tx->txreq,
+ iovec->pages[pageidx],
+ offset, len);
+ if (ret) {
+ dd_dev_err(pq->dd,
+ "SDMA txreq add page failed %d\n",
+ ret);
+ iovec_set_complete(iovec);
+ goto free_txreq;
+ }
+ iov_offset += len;
+ queued += len;
+ data_sent += len;
+ if (unlikely(queued < datalen &&
+ pageidx == iovec->npages &&
+ req->iov_idx < req->data_iovs - 1)) {
+ iovec->offset += iov_offset;
+ iovec = &req->iovs[++req->iov_idx];
+ if (!iovec->pages) {
+ ret = pin_vector_pages(req, iovec);
+ if (ret)
+ goto free_txreq;
+ }
+ iov_offset = 0;
+ tx->iovec2 = iovec;
+
+ }
+ }
+ /*
+ * The txreq was submitted successfully so we can update
+ * the counters.
+ */
+ req->koffset += datalen;
+ if (req_opcode(req->info.ctrl) == EXPECTED)
+ req->tidoffset += datalen;
+ req->sent += data_sent;
+ if (req->data_len) {
+ if (tx->iovec1 && !tx->iovec2)
+ tx->iovec1->offset += iov_offset;
+ else if (tx->iovec2)
+ tx->iovec2->offset += iov_offset;
+ }
+ /*
+ * It is important to increment this here as it is used to
+ * generate the BTH.PSN and, therefore, can't be bulk-updated
+ * outside of the loop.
+ */
+ tx->seqnum = req->seqnum++;
+ list_add_tail(&tx->txreq.list, &req->txps);
+ npkts++;
+ }
+dosend:
+ ret = sdma_send_txlist(req->sde, &pq->busy, &req->txps);
+ if (list_empty(&req->txps))
+ if (req->seqnum == req->info.npkts) {
+ set_bit(SDMA_REQ_SEND_DONE, &req->flags);
+ /*
+ * The txreq has already been submitted to the HW queue
+ * so we can free the AHG entry now. Corruption will not
+ * happen due to the sequential manner in which
+ * descriptors are processed.
+ */
+ if (test_bit(SDMA_REQ_HAVE_AHG, &req->flags))
+ sdma_ahg_free(req->sde, req->ahg_idx);
+ }
+ goto done;
+free_txreq:
+ sdma_txclean(pq->dd, &tx->txreq);
+free_tx:
+ kmem_cache_free(pq->txreq_cache, tx);
+done:
+ return ret;
+}
+
+/*
+ * How many pages in this iovec element?
+ */
+static inline int num_user_pages(const struct iovec *iov)
+{
+ const unsigned long addr = (unsigned long) iov->iov_base;
+ const unsigned long len = iov->iov_len;
+ const unsigned long spage = addr & PAGE_MASK;
+ const unsigned long epage = (addr + len - 1) & PAGE_MASK;
+
+ return 1 + ((epage - spage) >> PAGE_SHIFT);
+}
+
+static int pin_vector_pages(struct user_sdma_request *req,
+ struct user_sdma_iovec *iovec) {
+ int ret = 0;
+ unsigned pinned;
+
+ iovec->npages = num_user_pages(&iovec->iov);
+ iovec->pages = kzalloc(sizeof(*iovec->pages) *
+ iovec->npages, GFP_KERNEL);
+ if (!iovec->pages) {
+ SDMA_DBG(req, "Failed page array alloc");
+ ret = -ENOMEM;
+ goto done;
+ }
+ /* If called by the kernel thread, use the user's mm */
+ if (current->flags & PF_KTHREAD)
+ use_mm(req->user_proc->mm);
+ pinned = get_user_pages_fast(
+ (unsigned long)iovec->iov.iov_base,
+ iovec->npages, 0, iovec->pages);
+ /* If called by the kernel thread, unuse the user's mm */
+ if (current->flags & PF_KTHREAD)
+ unuse_mm(req->user_proc->mm);
+ if (pinned != iovec->npages) {
+ SDMA_DBG(req, "Failed to pin pages (%u/%u)", pinned,
+ iovec->npages);
+ ret = -EFAULT;
+ goto pfree;
+ }
+ goto done;
+pfree:
+ unpin_vector_pages(iovec);
+done:
+ return ret;
+}
+
+static void unpin_vector_pages(struct user_sdma_iovec *iovec)
+{
+ unsigned i;
+
+ if (ACCESS_ONCE(iovec->offset) != iovec->iov.iov_len) {
+ hfi1_cdbg(SDMA,
+ "the complete vector has not been sent yet %llu %zu",
+ iovec->offset, iovec->iov.iov_len);
+ return;
+ }
+ for (i = 0; i < iovec->npages; i++)
+ if (iovec->pages[i])
+ put_page(iovec->pages[i]);
+ kfree(iovec->pages);
+ iovec->pages = NULL;
+ iovec->npages = 0;
+ iovec->offset = 0;
+}
+
+static int check_header_template(struct user_sdma_request *req,
+ struct hfi1_pkt_header *hdr, u32 lrhlen,
+ u32 datalen)
+{
+ /*
+ * Perform safety checks for any type of packet:
+ * - transfer size is multiple of 64bytes
+ * - packet length is multiple of 4bytes
+ * - entire request length is multiple of 4bytes
+ * - packet length is not larger than MTU size
+ *
+ * These checks are only done for the first packet of the
+ * transfer since the header is "given" to us by user space.
+ * For the remainder of the packets we compute the values.
+ */
+ if (req->info.fragsize % PIO_BLOCK_SIZE ||
+ lrhlen & 0x3 || req->data_len & 0x3 ||
+ lrhlen > get_lrh_len(*hdr, req->info.fragsize))
+ return -EINVAL;
+
+ if (req_opcode(req->info.ctrl) == EXPECTED) {
+ /*
+ * The header is checked only on the first packet. Furthermore,
+ * we ensure that at least one TID entry is copied when the
+ * request is submitted. Therefore, we don't have to verify that
+ * tididx points to something sane.
+ */
+ u32 tidval = req->tids[req->tididx],
+ tidlen = EXP_TID_GET(tidval, LEN) * PAGE_SIZE,
+ tididx = EXP_TID_GET(tidval, IDX),
+ tidctrl = EXP_TID_GET(tidval, CTRL),
+ tidoff;
+ __le32 kval = hdr->kdeth.ver_tid_offset;
+
+ tidoff = KDETH_GET(kval, OFFSET) *
+ (KDETH_GET(req->hdr.kdeth.ver_tid_offset, OM) ?
+ KDETH_OM_LARGE : KDETH_OM_SMALL);
+ /*
+ * Expected receive packets have the following
+ * additional checks:
+ * - offset is not larger than the TID size
+ * - TIDCtrl values match between header and TID array
+ * - TID indexes match between header and TID array
+ */
+ if ((tidoff + datalen > tidlen) ||
+ KDETH_GET(kval, TIDCTRL) != tidctrl ||
+ KDETH_GET(kval, TID) != tididx)
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * Correctly set the BTH.PSN field based on type of
+ * transfer - eager packets can just increment the PSN but
+ * expected packets encode generation and sequence in the
+ * BTH.PSN field so just incrementing will result in errors.
+ */
+static inline u32 set_pkt_bth_psn(__be32 bthpsn, u8 expct, u32 frags)
+{
+ u32 val = be32_to_cpu(bthpsn),
+ mask = (HFI1_CAP_IS_KSET(EXTENDED_PSN) ? 0x7fffffffull :
+ 0xffffffull),
+ psn = val & mask;
+ if (expct)
+ psn = (psn & ~BTH_SEQ_MASK) | ((psn + frags) & BTH_SEQ_MASK);
+ else
+ psn = psn + frags;
+ return psn & mask;
+}
+
+static int set_txreq_header(struct user_sdma_request *req,
+ struct user_sdma_txreq *tx, u32 datalen)
+{
+ struct hfi1_user_sdma_pkt_q *pq = req->pq;
+ struct hfi1_pkt_header *hdr = &tx->hdr;
+ u16 pbclen;
+ int ret;
+ u32 tidval = 0, lrhlen = get_lrh_len(*hdr, datalen);
+
+ /* Copy the header template to the request before modification */
+ memcpy(hdr, &req->hdr, sizeof(*hdr));
+
+ /*
+ * Check if the PBC and LRH length are mismatched. If so
+ * adjust both in the header.
+ */
+ pbclen = le16_to_cpu(hdr->pbc[0]);
+ if (PBC2LRH(pbclen) != lrhlen) {
+ pbclen = (pbclen & 0xf000) | LRH2PBC(lrhlen);
+ hdr->pbc[0] = cpu_to_le16(pbclen);
+ hdr->lrh[2] = cpu_to_be16(lrhlen >> 2);
+ /*
+ * Third packet
+ * This is the first packet in the sequence that has
+ * a "static" size that can be used for the rest of
+ * the packets (besides the last one).
+ */
+ if (unlikely(req->seqnum == 2)) {
+ /*
+ * From this point on the lengths in both the
+ * PBC and LRH are the same until the last
+ * packet.
+ * Adjust the template so we don't have to update
+ * every packet
+ */
+ req->hdr.pbc[0] = hdr->pbc[0];
+ req->hdr.lrh[2] = hdr->lrh[2];
+ }
+ }
+ /*
+ * We only have to modify the header if this is not the
+ * first packet in the request. Otherwise, we use the
+ * header given to us.
+ */
+ if (unlikely(!req->seqnum)) {
+ ret = check_header_template(req, hdr, lrhlen, datalen);
+ if (ret)
+ return ret;
+ goto done;
+
+ }
+
+ hdr->bth[2] = cpu_to_be32(
+ set_pkt_bth_psn(hdr->bth[2],
+ (req_opcode(req->info.ctrl) == EXPECTED),
+ req->seqnum));
+
+ /* Set ACK request on last packet */
+ if (unlikely(tx->flags & USER_SDMA_TXREQ_FLAGS_LAST_PKT))
+ hdr->bth[2] |= cpu_to_be32(1UL<<31);
+
+ /* Set the new offset */
+ hdr->kdeth.swdata[6] = cpu_to_le32(req->koffset);
+ /* Expected packets have to fill in the new TID information */
+ if (req_opcode(req->info.ctrl) == EXPECTED) {
+ tidval = req->tids[req->tididx];
+ /*
+ * If the offset puts us at the end of the current TID,
+ * advance everything.
+ */
+ if ((req->tidoffset) == (EXP_TID_GET(tidval, LEN) *
+ PAGE_SIZE)) {
+ req->tidoffset = 0;
+ /* Since we don't copy all the TIDs, all at once,
+ * we have to check again. */
+ if (++req->tididx > req->n_tids - 1 ||
+ !req->tids[req->tididx]) {
+ return -EINVAL;
+ }
+ tidval = req->tids[req->tididx];
+ }
+ req->omfactor = EXP_TID_GET(tidval, LEN) * PAGE_SIZE >=
+ KDETH_OM_MAX_SIZE ? KDETH_OM_LARGE : KDETH_OM_SMALL;
+ /* Set KDETH.TIDCtrl based on value for this TID. */
+ KDETH_SET(hdr->kdeth.ver_tid_offset, TIDCTRL,
+ EXP_TID_GET(tidval, CTRL));
+ /* Set KDETH.TID based on value for this TID */
+ KDETH_SET(hdr->kdeth.ver_tid_offset, TID,
+ EXP_TID_GET(tidval, IDX));
+ /* Clear KDETH.SH only on the last packet */
+ if (unlikely(tx->flags & USER_SDMA_TXREQ_FLAGS_LAST_PKT))
+ KDETH_SET(hdr->kdeth.ver_tid_offset, SH, 0);
+ /*
+ * Set the KDETH.OFFSET and KDETH.OM based on size of
+ * transfer.
+ */
+ SDMA_DBG(req, "TID offset %ubytes %uunits om%u",
+ req->tidoffset, req->tidoffset / req->omfactor,
+ !!(req->omfactor - KDETH_OM_SMALL));
+ KDETH_SET(hdr->kdeth.ver_tid_offset, OFFSET,
+ req->tidoffset / req->omfactor);
+ KDETH_SET(hdr->kdeth.ver_tid_offset, OM,
+ !!(req->omfactor - KDETH_OM_SMALL));
+ }
+done:
+ trace_hfi1_sdma_user_header(pq->dd, pq->ctxt, pq->subctxt,
+ req->info.comp_idx, hdr, tidval);
+ return sdma_txadd_kvaddr(pq->dd, &tx->txreq, hdr, sizeof(*hdr));
+}
+
+static int set_txreq_header_ahg(struct user_sdma_request *req,
+ struct user_sdma_txreq *tx, u32 len)
+{
+ int diff = 0;
+ struct hfi1_user_sdma_pkt_q *pq = req->pq;
+ struct hfi1_pkt_header *hdr = &req->hdr;
+ u16 pbclen = le16_to_cpu(hdr->pbc[0]);
+ u32 val32, tidval = 0, lrhlen = get_lrh_len(*hdr, len);
+
+ if (PBC2LRH(pbclen) != lrhlen) {
+ /* PBC.PbcLengthDWs */
+ AHG_HEADER_SET(req->ahg, diff, 0, 0, 12,
+ cpu_to_le16(LRH2PBC(lrhlen)));
+ /* LRH.PktLen (we need the full 16 bits due to byte swap) */
+ AHG_HEADER_SET(req->ahg, diff, 3, 0, 16,
+ cpu_to_be16(lrhlen >> 2));
+ }
+
+ /*
+ * Do the common updates
+ */
+ /* BTH.PSN and BTH.A */
+ val32 = (be32_to_cpu(hdr->bth[2]) + req->seqnum) &
+ (HFI1_CAP_IS_KSET(EXTENDED_PSN) ? 0x7fffffff : 0xffffff);
+ if (unlikely(tx->flags & USER_SDMA_TXREQ_FLAGS_LAST_PKT))
+ val32 |= 1UL << 31;
+ AHG_HEADER_SET(req->ahg, diff, 6, 0, 16, cpu_to_be16(val32 >> 16));
+ AHG_HEADER_SET(req->ahg, diff, 6, 16, 16, cpu_to_be16(val32 & 0xffff));
+ /* KDETH.Offset */
+ AHG_HEADER_SET(req->ahg, diff, 15, 0, 16,
+ cpu_to_le16(req->koffset & 0xffff));
+ AHG_HEADER_SET(req->ahg, diff, 15, 16, 16,
+ cpu_to_le16(req->koffset >> 16));
+ if (req_opcode(req->info.ctrl) == EXPECTED) {
+ __le16 val;
+
+ tidval = req->tids[req->tididx];
+
+ /*
+ * If the offset puts us at the end of the current TID,
+ * advance everything.
+ */
+ if ((req->tidoffset) == (EXP_TID_GET(tidval, LEN) *
+ PAGE_SIZE)) {
+ req->tidoffset = 0;
+ /* Since we don't copy all the TIDs, all at once,
+ * we have to check again. */
+ if (++req->tididx > req->n_tids - 1 ||
+ !req->tids[req->tididx]) {
+ return -EINVAL;
+ }
+ tidval = req->tids[req->tididx];
+ }
+ req->omfactor = ((EXP_TID_GET(tidval, LEN) *
+ PAGE_SIZE) >=
+ KDETH_OM_MAX_SIZE) ? KDETH_OM_LARGE :
+ KDETH_OM_SMALL;
+ /* KDETH.OM and KDETH.OFFSET (TID) */
+ AHG_HEADER_SET(req->ahg, diff, 7, 0, 16,
+ ((!!(req->omfactor - KDETH_OM_SMALL)) << 15 |
+ ((req->tidoffset / req->omfactor) & 0x7fff)));
+ /* KDETH.TIDCtrl, KDETH.TID */
+ val = cpu_to_le16(((EXP_TID_GET(tidval, CTRL) & 0x3) << 10) |
+ (EXP_TID_GET(tidval, IDX) & 0x3ff));
+ /* Clear KDETH.SH on last packet */
+ if (unlikely(tx->flags & USER_SDMA_TXREQ_FLAGS_LAST_PKT)) {
+ val |= cpu_to_le16(KDETH_GET(hdr->kdeth.ver_tid_offset,
+ INTR) >> 16);
+ val &= cpu_to_le16(~(1U << 13));
+ AHG_HEADER_SET(req->ahg, diff, 7, 16, 14, val);
+ } else
+ AHG_HEADER_SET(req->ahg, diff, 7, 16, 12, val);
+ }
+
+ trace_hfi1_sdma_user_header_ahg(pq->dd, pq->ctxt, pq->subctxt,
+ req->info.comp_idx, req->sde->this_idx,
+ req->ahg_idx, req->ahg, diff, tidval);
+ return diff;
+}
+
+static void user_sdma_txreq_cb(struct sdma_txreq *txreq, int status,
+ int drain)
+{
+ struct user_sdma_txreq *tx =
+ container_of(txreq, struct user_sdma_txreq, txreq);
+ struct user_sdma_request *req = tx->req;
+ struct hfi1_user_sdma_pkt_q *pq = req ? req->pq : NULL;
+ u64 tx_seqnum;
+
+ if (unlikely(!req || !pq))
+ return;
+
+ if (tx->iovec1)
+ iovec_may_free(tx->iovec1, unpin_vector_pages);
+ if (tx->iovec2)
+ iovec_may_free(tx->iovec2, unpin_vector_pages);
+
+ tx_seqnum = tx->seqnum;
+ kmem_cache_free(pq->txreq_cache, tx);
+
+ if (status != SDMA_TXREQ_S_OK) {
+ dd_dev_err(pq->dd, "SDMA completion with error %d", status);
+ set_comp_state(req, ERROR, status);
+ set_bit(SDMA_REQ_HAS_ERROR, &req->flags);
+ /* Do not free the request until the sender loop has ack'ed
+ * the error and we've seen all txreqs. */
+ if (tx_seqnum == ACCESS_ONCE(req->seqnum) &&
+ test_bit(SDMA_REQ_DONE_ERROR, &req->flags)) {
+ atomic_dec(&pq->n_reqs);
+ user_sdma_free_request(req);
+ }
+ } else {
+ if (tx_seqnum == req->info.npkts - 1) {
+ /* We've sent and completed all packets in this
+ * request. Signal completion to the user */
+ atomic_dec(&pq->n_reqs);
+ set_comp_state(req, COMPLETE, 0);
+ user_sdma_free_request(req);
+ }
+ }
+ if (!atomic_read(&pq->n_reqs))
+ xchg(&pq->state, SDMA_PKT_Q_INACTIVE);
+}
+
+static void user_sdma_free_request(struct user_sdma_request *req)
+{
+ if (!list_empty(&req->txps)) {
+ struct sdma_txreq *t, *p;
+
+ list_for_each_entry_safe(t, p, &req->txps, list) {
+ struct user_sdma_txreq *tx =
+ container_of(t, struct user_sdma_txreq, txreq);
+ list_del_init(&t->list);
+ sdma_txclean(req->pq->dd, t);
+ kmem_cache_free(req->pq->txreq_cache, tx);
+ }
+ }
+ if (req->data_iovs) {
+ int i;
+
+ for (i = 0; i < req->data_iovs; i++)
+ if (req->iovs[i].npages && req->iovs[i].pages)
+ unpin_vector_pages(&req->iovs[i]);
+ }
+ if (req->user_proc)
+ put_task_struct(req->user_proc);
+ kfree(req->tids);
+ clear_bit(SDMA_REQ_IN_USE, &req->flags);
+}
+
+static inline void set_comp_state(struct user_sdma_request *req,
+ enum hfi1_sdma_comp_state state,
+ int ret)
+{
+ SDMA_DBG(req, "Setting completion status %u %d", state, ret);
+ req->cq->comps[req->info.comp_idx].status = state;
+ if (state == ERROR)
+ req->cq->comps[req->info.comp_idx].errcode = -ret;
+ trace_hfi1_sdma_user_completion(req->pq->dd, req->pq->ctxt,
+ req->pq->subctxt, req->info.comp_idx,
+ state, ret);
+}
diff --git a/drivers/staging/rdma/hfi1/user_sdma.h b/drivers/staging/rdma/hfi1/user_sdma.h
new file mode 100644
index 0000000..fa44225
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/user_sdma.h
@@ -0,0 +1,89 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <linux/device.h>
+#include <linux/wait.h>
+
+#include "common.h"
+#include "iowait.h"
+
+#define EXP_TID_TIDLEN_MASK 0x7FFULL
+#define EXP_TID_TIDLEN_SHIFT 0
+#define EXP_TID_TIDCTRL_MASK 0x3ULL
+#define EXP_TID_TIDCTRL_SHIFT 20
+#define EXP_TID_TIDIDX_MASK 0x7FFULL
+#define EXP_TID_TIDIDX_SHIFT 22
+#define EXP_TID_GET(tid, field) \
+ (((tid) >> EXP_TID_TID##field##_SHIFT) & EXP_TID_TID##field##_MASK)
+
+extern uint extended_psn;
+
+struct hfi1_user_sdma_pkt_q {
+ struct list_head list;
+ unsigned ctxt;
+ unsigned subctxt;
+ u16 n_max_reqs;
+ atomic_t n_reqs;
+ u16 reqidx;
+ struct hfi1_devdata *dd;
+ struct kmem_cache *txreq_cache;
+ struct user_sdma_request *reqs;
+ struct iowait busy;
+ unsigned state;
+};
+
+struct hfi1_user_sdma_comp_q {
+ u16 nentries;
+ struct hfi1_sdma_comp_entry *comps;
+};
+
+int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *, struct file *);
+int hfi1_user_sdma_free_queues(struct hfi1_filedata *);
+int hfi1_user_sdma_process_request(struct file *, struct iovec *, unsigned long,
+ unsigned long *);
diff --git a/drivers/staging/rdma/hfi1/verbs.c b/drivers/staging/rdma/hfi1/verbs.c
new file mode 100644
index 0000000..5f4b661
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/verbs.c
@@ -0,0 +1,2142 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <rdma/ib_mad.h>
+#include <rdma/ib_user_verbs.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/utsname.h>
+#include <linux/rculist.h>
+#include <linux/mm.h>
+#include <linux/random.h>
+#include <linux/vmalloc.h>
+
+#include "hfi.h"
+#include "common.h"
+#include "device.h"
+#include "trace.h"
+#include "qp.h"
+#include "sdma.h"
+
+unsigned int hfi1_lkey_table_size = 16;
+module_param_named(lkey_table_size, hfi1_lkey_table_size, uint,
+ S_IRUGO);
+MODULE_PARM_DESC(lkey_table_size,
+ "LKEY table size in bits (2^n, 1 <= n <= 23)");
+
+static unsigned int hfi1_max_pds = 0xFFFF;
+module_param_named(max_pds, hfi1_max_pds, uint, S_IRUGO);
+MODULE_PARM_DESC(max_pds,
+ "Maximum number of protection domains to support");
+
+static unsigned int hfi1_max_ahs = 0xFFFF;
+module_param_named(max_ahs, hfi1_max_ahs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
+
+unsigned int hfi1_max_cqes = 0x2FFFF;
+module_param_named(max_cqes, hfi1_max_cqes, uint, S_IRUGO);
+MODULE_PARM_DESC(max_cqes,
+ "Maximum number of completion queue entries to support");
+
+unsigned int hfi1_max_cqs = 0x1FFFF;
+module_param_named(max_cqs, hfi1_max_cqs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
+
+unsigned int hfi1_max_qp_wrs = 0x3FFF;
+module_param_named(max_qp_wrs, hfi1_max_qp_wrs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
+
+unsigned int hfi1_max_qps = 16384;
+module_param_named(max_qps, hfi1_max_qps, uint, S_IRUGO);
+MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support");
+
+unsigned int hfi1_max_sges = 0x60;
+module_param_named(max_sges, hfi1_max_sges, uint, S_IRUGO);
+MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
+
+unsigned int hfi1_max_mcast_grps = 16384;
+module_param_named(max_mcast_grps, hfi1_max_mcast_grps, uint, S_IRUGO);
+MODULE_PARM_DESC(max_mcast_grps,
+ "Maximum number of multicast groups to support");
+
+unsigned int hfi1_max_mcast_qp_attached = 16;
+module_param_named(max_mcast_qp_attached, hfi1_max_mcast_qp_attached,
+ uint, S_IRUGO);
+MODULE_PARM_DESC(max_mcast_qp_attached,
+ "Maximum number of attached QPs to support");
+
+unsigned int hfi1_max_srqs = 1024;
+module_param_named(max_srqs, hfi1_max_srqs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
+
+unsigned int hfi1_max_srq_sges = 128;
+module_param_named(max_srq_sges, hfi1_max_srq_sges, uint, S_IRUGO);
+MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
+
+unsigned int hfi1_max_srq_wrs = 0x1FFFF;
+module_param_named(max_srq_wrs, hfi1_max_srq_wrs, uint, S_IRUGO);
+MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
+
+static void verbs_sdma_complete(
+ struct sdma_txreq *cookie,
+ int status,
+ int drained);
+
+/*
+ * Note that it is OK to post send work requests in the SQE and ERR
+ * states; hfi1_do_send() will process them and generate error
+ * completions as per IB 1.2 C10-96.
+ */
+const int ib_hfi1_state_ops[IB_QPS_ERR + 1] = {
+ [IB_QPS_RESET] = 0,
+ [IB_QPS_INIT] = HFI1_POST_RECV_OK,
+ [IB_QPS_RTR] = HFI1_POST_RECV_OK | HFI1_PROCESS_RECV_OK,
+ [IB_QPS_RTS] = HFI1_POST_RECV_OK | HFI1_PROCESS_RECV_OK |
+ HFI1_POST_SEND_OK | HFI1_PROCESS_SEND_OK |
+ HFI1_PROCESS_NEXT_SEND_OK,
+ [IB_QPS_SQD] = HFI1_POST_RECV_OK | HFI1_PROCESS_RECV_OK |
+ HFI1_POST_SEND_OK | HFI1_PROCESS_SEND_OK,
+ [IB_QPS_SQE] = HFI1_POST_RECV_OK | HFI1_PROCESS_RECV_OK |
+ HFI1_POST_SEND_OK | HFI1_FLUSH_SEND,
+ [IB_QPS_ERR] = HFI1_POST_RECV_OK | HFI1_FLUSH_RECV |
+ HFI1_POST_SEND_OK | HFI1_FLUSH_SEND,
+};
+
+struct hfi1_ucontext {
+ struct ib_ucontext ibucontext;
+};
+
+static inline struct hfi1_ucontext *to_iucontext(struct ib_ucontext
+ *ibucontext)
+{
+ return container_of(ibucontext, struct hfi1_ucontext, ibucontext);
+}
+
+/*
+ * Translate ib_wr_opcode into ib_wc_opcode.
+ */
+const enum ib_wc_opcode ib_hfi1_wc_opcode[] = {
+ [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
+ [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
+ [IB_WR_SEND] = IB_WC_SEND,
+ [IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
+ [IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
+ [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
+ [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD
+};
+
+/*
+ * Length of header by opcode, 0 --> not supported
+ */
+const u8 hdr_len_by_opcode[256] = {
+ /* RC */
+ [IB_OPCODE_RC_SEND_FIRST] = 12 + 8,
+ [IB_OPCODE_RC_SEND_MIDDLE] = 12 + 8,
+ [IB_OPCODE_RC_SEND_LAST] = 12 + 8,
+ [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_RC_SEND_ONLY] = 12 + 8,
+ [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_RC_RDMA_WRITE_FIRST] = 12 + 8 + 16,
+ [IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = 12 + 8,
+ [IB_OPCODE_RC_RDMA_WRITE_LAST] = 12 + 8,
+ [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_RC_RDMA_WRITE_ONLY] = 12 + 8 + 16,
+ [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
+ [IB_OPCODE_RC_RDMA_READ_REQUEST] = 12 + 8 + 16,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = 12 + 8 + 4,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = 12 + 8,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = 12 + 8 + 4,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = 12 + 8 + 4,
+ [IB_OPCODE_RC_ACKNOWLEDGE] = 12 + 8 + 4,
+ [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = 12 + 8 + 4,
+ [IB_OPCODE_RC_COMPARE_SWAP] = 12 + 8 + 28,
+ [IB_OPCODE_RC_FETCH_ADD] = 12 + 8 + 28,
+ /* UC */
+ [IB_OPCODE_UC_SEND_FIRST] = 12 + 8,
+ [IB_OPCODE_UC_SEND_MIDDLE] = 12 + 8,
+ [IB_OPCODE_UC_SEND_LAST] = 12 + 8,
+ [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_UC_SEND_ONLY] = 12 + 8,
+ [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_UC_RDMA_WRITE_FIRST] = 12 + 8 + 16,
+ [IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = 12 + 8,
+ [IB_OPCODE_UC_RDMA_WRITE_LAST] = 12 + 8,
+ [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = 12 + 8 + 4,
+ [IB_OPCODE_UC_RDMA_WRITE_ONLY] = 12 + 8 + 16,
+ [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = 12 + 8 + 20,
+ /* UD */
+ [IB_OPCODE_UD_SEND_ONLY] = 12 + 8 + 8,
+ [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = 12 + 8 + 12
+};
+
+static const opcode_handler opcode_handler_tbl[256] = {
+ /* RC */
+ [IB_OPCODE_RC_SEND_FIRST] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_SEND_MIDDLE] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_SEND_LAST] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_SEND_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_SEND_ONLY] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_WRITE_FIRST] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_WRITE_MIDDLE] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_WRITE_LAST] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_WRITE_ONLY] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_READ_REQUEST] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_ACKNOWLEDGE] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_COMPARE_SWAP] = &hfi1_rc_rcv,
+ [IB_OPCODE_RC_FETCH_ADD] = &hfi1_rc_rcv,
+ /* UC */
+ [IB_OPCODE_UC_SEND_FIRST] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_SEND_MIDDLE] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_SEND_LAST] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_SEND_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_SEND_ONLY] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_RDMA_WRITE_FIRST] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_RDMA_WRITE_MIDDLE] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_RDMA_WRITE_LAST] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_RDMA_WRITE_LAST_WITH_IMMEDIATE] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_RDMA_WRITE_ONLY] = &hfi1_uc_rcv,
+ [IB_OPCODE_UC_RDMA_WRITE_ONLY_WITH_IMMEDIATE] = &hfi1_uc_rcv,
+ /* UD */
+ [IB_OPCODE_UD_SEND_ONLY] = &hfi1_ud_rcv,
+ [IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE] = &hfi1_ud_rcv,
+ /* CNP */
+ [IB_OPCODE_CNP] = &hfi1_cnp_rcv
+};
+
+/*
+ * System image GUID.
+ */
+__be64 ib_hfi1_sys_image_guid;
+
+/**
+ * hfi1_copy_sge - copy data to SGE memory
+ * @ss: the SGE state
+ * @data: the data to copy
+ * @length: the length of the data
+ */
+void hfi1_copy_sge(
+ struct hfi1_sge_state *ss,
+ void *data, u32 length,
+ int release)
+{
+ struct hfi1_sge *sge = &ss->sge;
+
+ while (length) {
+ u32 len = sge->length;
+
+ if (len > length)
+ len = length;
+ if (len > sge->sge_length)
+ len = sge->sge_length;
+ WARN_ON_ONCE(len == 0);
+ memcpy(sge->vaddr, data, len);
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (release)
+ hfi1_put_mr(sge->mr);
+ if (--ss->num_sge)
+ *sge = *ss->sg_list++;
+ } else if (sge->length == 0 && sge->mr->lkey) {
+ if (++sge->n >= HFI1_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ data += len;
+ length -= len;
+ }
+}
+
+/**
+ * hfi1_skip_sge - skip over SGE memory
+ * @ss: the SGE state
+ * @length: the number of bytes to skip
+ */
+void hfi1_skip_sge(struct hfi1_sge_state *ss, u32 length, int release)
+{
+ struct hfi1_sge *sge = &ss->sge;
+
+ while (length) {
+ u32 len = sge->length;
+
+ if (len > length)
+ len = length;
+ if (len > sge->sge_length)
+ len = sge->sge_length;
+ WARN_ON_ONCE(len == 0);
+ sge->vaddr += len;
+ sge->length -= len;
+ sge->sge_length -= len;
+ if (sge->sge_length == 0) {
+ if (release)
+ hfi1_put_mr(sge->mr);
+ if (--ss->num_sge)
+ *sge = *ss->sg_list++;
+ } else if (sge->length == 0 && sge->mr->lkey) {
+ if (++sge->n >= HFI1_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ break;
+ sge->n = 0;
+ }
+ sge->vaddr =
+ sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length =
+ sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+ length -= len;
+ }
+}
+
+/**
+ * post_one_send - post one RC, UC, or UD send work request
+ * @qp: the QP to post on
+ * @wr: the work request to send
+ */
+static int post_one_send(struct hfi1_qp *qp, struct ib_send_wr *wr)
+{
+ struct hfi1_swqe *wqe;
+ u32 next;
+ int i;
+ int j;
+ int acc;
+ struct hfi1_lkey_table *rkt;
+ struct hfi1_pd *pd;
+ struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
+ struct hfi1_pportdata *ppd;
+ struct hfi1_ibport *ibp;
+
+ /* IB spec says that num_sge == 0 is OK. */
+ if (unlikely(wr->num_sge > qp->s_max_sge))
+ return -EINVAL;
+
+ ppd = &dd->pport[qp->port_num - 1];
+ ibp = &ppd->ibport_data;
+
+ /*
+ * Don't allow RDMA reads or atomic operations on UC or
+ * undefined operations.
+ * Make sure buffer is large enough to hold the result for atomics.
+ */
+ if (wr->opcode == IB_WR_FAST_REG_MR) {
+ return -EINVAL;
+ } else if (qp->ibqp.qp_type == IB_QPT_UC) {
+ if ((unsigned) wr->opcode >= IB_WR_RDMA_READ)
+ return -EINVAL;
+ } else if (qp->ibqp.qp_type != IB_QPT_RC) {
+ /* Check IB_QPT_SMI, IB_QPT_GSI, IB_QPT_UD opcode */
+ if (wr->opcode != IB_WR_SEND &&
+ wr->opcode != IB_WR_SEND_WITH_IMM)
+ return -EINVAL;
+ /* Check UD destination address PD */
+ if (qp->ibqp.pd != wr->wr.ud.ah->pd)
+ return -EINVAL;
+ } else if ((unsigned) wr->opcode > IB_WR_ATOMIC_FETCH_AND_ADD)
+ return -EINVAL;
+ else if (wr->opcode >= IB_WR_ATOMIC_CMP_AND_SWP &&
+ (wr->num_sge == 0 ||
+ wr->sg_list[0].length < sizeof(u64) ||
+ wr->sg_list[0].addr & (sizeof(u64) - 1)))
+ return -EINVAL;
+ else if (wr->opcode >= IB_WR_RDMA_READ && !qp->s_max_rd_atomic)
+ return -EINVAL;
+
+ next = qp->s_head + 1;
+ if (next >= qp->s_size)
+ next = 0;
+ if (next == qp->s_last)
+ return -ENOMEM;
+
+ rkt = &to_idev(qp->ibqp.device)->lk_table;
+ pd = to_ipd(qp->ibqp.pd);
+ wqe = get_swqe_ptr(qp, qp->s_head);
+ wqe->wr = *wr;
+ wqe->length = 0;
+ j = 0;
+ if (wr->num_sge) {
+ acc = wr->opcode >= IB_WR_RDMA_READ ?
+ IB_ACCESS_LOCAL_WRITE : 0;
+ for (i = 0; i < wr->num_sge; i++) {
+ u32 length = wr->sg_list[i].length;
+ int ok;
+
+ if (length == 0)
+ continue;
+ ok = hfi1_lkey_ok(rkt, pd, &wqe->sg_list[j],
+ &wr->sg_list[i], acc);
+ if (!ok)
+ goto bail_inval_free;
+ wqe->length += length;
+ j++;
+ }
+ wqe->wr.num_sge = j;
+ }
+ if (qp->ibqp.qp_type == IB_QPT_UC ||
+ qp->ibqp.qp_type == IB_QPT_RC) {
+ if (wqe->length > 0x80000000U)
+ goto bail_inval_free;
+ } else {
+ struct hfi1_ah *ah = to_iah(wr->wr.ud.ah);
+
+ atomic_inc(&ah->refcount);
+ }
+ wqe->ssn = qp->s_ssn++;
+ qp->s_head = next;
+
+ return 0;
+
+bail_inval_free:
+ /* release mr holds */
+ while (j) {
+ struct hfi1_sge *sge = &wqe->sg_list[--j];
+
+ hfi1_put_mr(sge->mr);
+ }
+ return -EINVAL;
+}
+
+/**
+ * post_send - post a send on a QP
+ * @ibqp: the QP to post the send on
+ * @wr: the list of work requests to post
+ * @bad_wr: the first bad WR is put here
+ *
+ * This may be called from interrupt context.
+ */
+static int post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
+{
+ struct hfi1_qp *qp = to_iqp(ibqp);
+ int err = 0;
+ int call_send;
+ unsigned long flags;
+ unsigned nreq = 0;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+
+ /* Check that state is OK to post send. */
+ if (unlikely(!(ib_hfi1_state_ops[qp->state] & HFI1_POST_SEND_OK))) {
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return -EINVAL;
+ }
+
+ /* sq empty and not list -> call send */
+ call_send = qp->s_head == qp->s_last && !wr->next;
+
+ for (; wr; wr = wr->next) {
+ err = post_one_send(qp, wr);
+ if (unlikely(err)) {
+ *bad_wr = wr;
+ goto bail;
+ }
+ nreq++;
+ }
+bail:
+ if (nreq && !call_send)
+ hfi1_schedule_send(qp);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ if (nreq && call_send)
+ hfi1_do_send(&qp->s_iowait.iowork);
+ return err;
+}
+
+/**
+ * post_receive - post a receive on a QP
+ * @ibqp: the QP to post the receive on
+ * @wr: the WR to post
+ * @bad_wr: the first bad WR is put here
+ *
+ * This may be called from interrupt context.
+ */
+static int post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct hfi1_qp *qp = to_iqp(ibqp);
+ struct hfi1_rwq *wq = qp->r_rq.wq;
+ unsigned long flags;
+ int ret;
+
+ /* Check that state is OK to post receive. */
+ if (!(ib_hfi1_state_ops[qp->state] & HFI1_POST_RECV_OK) || !wq) {
+ *bad_wr = wr;
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ for (; wr; wr = wr->next) {
+ struct hfi1_rwqe *wqe;
+ u32 next;
+ int i;
+
+ if ((unsigned) wr->num_sge > qp->r_rq.max_sge) {
+ *bad_wr = wr;
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ spin_lock_irqsave(&qp->r_rq.lock, flags);
+ next = wq->head + 1;
+ if (next >= qp->r_rq.size)
+ next = 0;
+ if (next == wq->tail) {
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ *bad_wr = wr;
+ ret = -ENOMEM;
+ goto bail;
+ }
+
+ wqe = get_rwqe_ptr(&qp->r_rq, wq->head);
+ wqe->wr_id = wr->wr_id;
+ wqe->num_sge = wr->num_sge;
+ for (i = 0; i < wr->num_sge; i++)
+ wqe->sg_list[i] = wr->sg_list[i];
+ /* Make sure queue entry is written before the head index. */
+ smp_wmb();
+ wq->head = next;
+ spin_unlock_irqrestore(&qp->r_rq.lock, flags);
+ }
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+/*
+ * Make sure the QP is ready and able to accept the given opcode.
+ */
+static inline int qp_ok(int opcode, struct hfi1_packet *packet)
+{
+ struct hfi1_ibport *ibp;
+
+ if (!(ib_hfi1_state_ops[packet->qp->state] & HFI1_PROCESS_RECV_OK))
+ goto dropit;
+ if (((opcode & OPCODE_QP_MASK) == packet->qp->allowed_ops) ||
+ (opcode == IB_OPCODE_CNP))
+ return 1;
+dropit:
+ ibp = &packet->rcd->ppd->ibport_data;
+ ibp->n_pkt_drops++;
+ return 0;
+}
+
+
+/**
+ * hfi1_ib_rcv - process an incoming packet
+ * @packet: data packet information
+ *
+ * This is called to process an incoming packet at interrupt level.
+ *
+ * Tlen is the length of the header + data + CRC in bytes.
+ */
+void hfi1_ib_rcv(struct hfi1_packet *packet)
+{
+ struct hfi1_ctxtdata *rcd = packet->rcd;
+ struct hfi1_ib_header *hdr = packet->hdr;
+ u32 tlen = packet->tlen;
+ struct hfi1_pportdata *ppd = rcd->ppd;
+ struct hfi1_ibport *ibp = &ppd->ibport_data;
+ u32 qp_num;
+ int lnh;
+ u8 opcode;
+ u16 lid;
+
+ /* Check for GRH */
+ lnh = be16_to_cpu(hdr->lrh[0]) & 3;
+ if (lnh == HFI1_LRH_BTH)
+ packet->ohdr = &hdr->u.oth;
+ else if (lnh == HFI1_LRH_GRH) {
+ u32 vtf;
+
+ packet->ohdr = &hdr->u.l.oth;
+ if (hdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR)
+ goto drop;
+ vtf = be32_to_cpu(hdr->u.l.grh.version_tclass_flow);
+ if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
+ goto drop;
+ packet->rcv_flags |= HFI1_HAS_GRH;
+ } else
+ goto drop;
+
+ trace_input_ibhdr(rcd->dd, hdr);
+
+ opcode = (be32_to_cpu(packet->ohdr->bth[0]) >> 24);
+ inc_opstats(tlen, &rcd->opstats->stats[opcode]);
+
+ /* Get the destination QP number. */
+ qp_num = be32_to_cpu(packet->ohdr->bth[1]) & HFI1_QPN_MASK;
+ lid = be16_to_cpu(hdr->lrh[1]);
+ if (unlikely((lid >= HFI1_MULTICAST_LID_BASE) &&
+ (lid != HFI1_PERMISSIVE_LID))) {
+ struct hfi1_mcast *mcast;
+ struct hfi1_mcast_qp *p;
+
+ if (lnh != HFI1_LRH_GRH)
+ goto drop;
+ mcast = hfi1_mcast_find(ibp, &hdr->u.l.grh.dgid);
+ if (mcast == NULL)
+ goto drop;
+ list_for_each_entry_rcu(p, &mcast->qp_list, list) {
+ packet->qp = p->qp;
+ spin_lock(&packet->qp->r_lock);
+ if (likely((qp_ok(opcode, packet))))
+ opcode_handler_tbl[opcode](packet);
+ spin_unlock(&packet->qp->r_lock);
+ }
+ /*
+ * Notify hfi1_multicast_detach() if it is waiting for us
+ * to finish.
+ */
+ if (atomic_dec_return(&mcast->refcount) <= 1)
+ wake_up(&mcast->wait);
+ } else {
+ rcu_read_lock();
+ packet->qp = hfi1_lookup_qpn(ibp, qp_num);
+ if (!packet->qp) {
+ rcu_read_unlock();
+ goto drop;
+ }
+ spin_lock(&packet->qp->r_lock);
+ if (likely((qp_ok(opcode, packet))))
+ opcode_handler_tbl[opcode](packet);
+ spin_unlock(&packet->qp->r_lock);
+ rcu_read_unlock();
+ }
+ return;
+
+drop:
+ ibp->n_pkt_drops++;
+}
+
+/*
+ * This is called from a timer to check for QPs
+ * which need kernel memory in order to send a packet.
+ */
+static void mem_timer(unsigned long data)
+{
+ struct hfi1_ibdev *dev = (struct hfi1_ibdev *)data;
+ struct list_head *list = &dev->memwait;
+ struct hfi1_qp *qp = NULL;
+ struct iowait *wait;
+ unsigned long flags;
+
+ write_seqlock_irqsave(&dev->iowait_lock, flags);
+ if (!list_empty(list)) {
+ wait = list_first_entry(list, struct iowait, list);
+ qp = container_of(wait, struct hfi1_qp, s_iowait);
+ list_del_init(&qp->s_iowait.list);
+ /* refcount held until actual wake up */
+ if (!list_empty(list))
+ mod_timer(&dev->mem_timer, jiffies + 1);
+ }
+ write_sequnlock_irqrestore(&dev->iowait_lock, flags);
+
+ if (qp)
+ hfi1_qp_wakeup(qp, HFI1_S_WAIT_KMEM);
+}
+
+void update_sge(struct hfi1_sge_state *ss, u32 length)
+{
+ struct hfi1_sge *sge = &ss->sge;
+
+ sge->vaddr += length;
+ sge->length -= length;
+ sge->sge_length -= length;
+ if (sge->sge_length == 0) {
+ if (--ss->num_sge)
+ *sge = *ss->sg_list++;
+ } else if (sge->length == 0 && sge->mr->lkey) {
+ if (++sge->n >= HFI1_SEGSZ) {
+ if (++sge->m >= sge->mr->mapsz)
+ return;
+ sge->n = 0;
+ }
+ sge->vaddr = sge->mr->map[sge->m]->segs[sge->n].vaddr;
+ sge->length = sge->mr->map[sge->m]->segs[sge->n].length;
+ }
+}
+
+static noinline struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
+ struct hfi1_qp *qp)
+{
+ struct verbs_txreq *tx;
+ unsigned long flags;
+
+ tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC);
+ if (!tx) {
+ spin_lock_irqsave(&qp->s_lock, flags);
+ write_seqlock(&dev->iowait_lock);
+ if (ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK &&
+ list_empty(&qp->s_iowait.list)) {
+ dev->n_txwait++;
+ qp->s_flags |= HFI1_S_WAIT_TX;
+ list_add_tail(&qp->s_iowait.list, &dev->txwait);
+ trace_hfi1_qpsleep(qp, HFI1_S_WAIT_TX);
+ atomic_inc(&qp->refcount);
+ }
+ qp->s_flags &= ~HFI1_S_BUSY;
+ write_sequnlock(&dev->iowait_lock);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ tx = ERR_PTR(-EBUSY);
+ }
+ return tx;
+}
+
+static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev,
+ struct hfi1_qp *qp)
+{
+ struct verbs_txreq *tx;
+
+ tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC);
+ if (!tx)
+ /* call slow path to get the lock */
+ tx = __get_txreq(dev, qp);
+ if (tx)
+ tx->qp = qp;
+ return tx;
+}
+
+void hfi1_put_txreq(struct verbs_txreq *tx)
+{
+ struct hfi1_ibdev *dev;
+ struct hfi1_qp *qp;
+ unsigned long flags;
+ unsigned int seq;
+
+ qp = tx->qp;
+ dev = to_idev(qp->ibqp.device);
+
+ if (tx->mr) {
+ hfi1_put_mr(tx->mr);
+ tx->mr = NULL;
+ }
+ sdma_txclean(dd_from_dev(dev), &tx->txreq);
+
+ /* Free verbs_txreq and return to slab cache */
+ kmem_cache_free(dev->verbs_txreq_cache, tx);
+
+ do {
+ seq = read_seqbegin(&dev->iowait_lock);
+ if (!list_empty(&dev->txwait)) {
+ struct iowait *wait;
+
+ write_seqlock_irqsave(&dev->iowait_lock, flags);
+ /* Wake up first QP wanting a free struct */
+ wait = list_first_entry(&dev->txwait, struct iowait,
+ list);
+ qp = container_of(wait, struct hfi1_qp, s_iowait);
+ list_del_init(&qp->s_iowait.list);
+ /* refcount held until actual wake up */
+ write_sequnlock_irqrestore(&dev->iowait_lock, flags);
+ hfi1_qp_wakeup(qp, HFI1_S_WAIT_TX);
+ break;
+ }
+ } while (read_seqretry(&dev->iowait_lock, seq));
+}
+
+/*
+ * This is called with progress side lock held.
+ */
+/* New API */
+static void verbs_sdma_complete(
+ struct sdma_txreq *cookie,
+ int status,
+ int drained)
+{
+ struct verbs_txreq *tx =
+ container_of(cookie, struct verbs_txreq, txreq);
+ struct hfi1_qp *qp = tx->qp;
+
+ spin_lock(&qp->s_lock);
+ if (tx->wqe)
+ hfi1_send_complete(qp, tx->wqe, IB_WC_SUCCESS);
+ else if (qp->ibqp.qp_type == IB_QPT_RC) {
+ struct hfi1_ib_header *hdr;
+
+ hdr = &tx->phdr.hdr;
+ hfi1_rc_send_complete(qp, hdr);
+ }
+ if (drained) {
+ /*
+ * This happens when the send engine notes
+ * a QP in the error state and cannot
+ * do the flush work until that QP's
+ * sdma work has finished.
+ */
+ if (qp->s_flags & HFI1_S_WAIT_DMA) {
+ qp->s_flags &= ~HFI1_S_WAIT_DMA;
+ hfi1_schedule_send(qp);
+ }
+ }
+ spin_unlock(&qp->s_lock);
+
+ hfi1_put_txreq(tx);
+}
+
+static int wait_kmem(struct hfi1_ibdev *dev, struct hfi1_qp *qp)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK) {
+ write_seqlock(&dev->iowait_lock);
+ if (list_empty(&qp->s_iowait.list)) {
+ if (list_empty(&dev->memwait))
+ mod_timer(&dev->mem_timer, jiffies + 1);
+ qp->s_flags |= HFI1_S_WAIT_KMEM;
+ list_add_tail(&qp->s_iowait.list, &dev->memwait);
+ trace_hfi1_qpsleep(qp, HFI1_S_WAIT_KMEM);
+ atomic_inc(&qp->refcount);
+ }
+ write_sequnlock(&dev->iowait_lock);
+ qp->s_flags &= ~HFI1_S_BUSY;
+ ret = -EBUSY;
+ }
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+
+ return ret;
+}
+
+/*
+ * This routine calls txadds for each sg entry.
+ *
+ * Add failures will revert the sge cursor
+ */
+static int build_verbs_ulp_payload(
+ struct sdma_engine *sde,
+ struct hfi1_sge_state *ss,
+ u32 length,
+ struct verbs_txreq *tx)
+{
+ struct hfi1_sge *sg_list = ss->sg_list;
+ struct hfi1_sge sge = ss->sge;
+ u8 num_sge = ss->num_sge;
+ u32 len;
+ int ret = 0;
+
+ while (length) {
+ len = ss->sge.length;
+ if (len > length)
+ len = length;
+ if (len > ss->sge.sge_length)
+ len = ss->sge.sge_length;
+ WARN_ON_ONCE(len == 0);
+ ret = sdma_txadd_kvaddr(
+ sde->dd,
+ &tx->txreq,
+ ss->sge.vaddr,
+ len);
+ if (ret)
+ goto bail_txadd;
+ update_sge(ss, len);
+ length -= len;
+ }
+ return ret;
+bail_txadd:
+ /* unwind cursor */
+ ss->sge = sge;
+ ss->num_sge = num_sge;
+ ss->sg_list = sg_list;
+ return ret;
+}
+
+/*
+ * Build the number of DMA descriptors needed to send length bytes of data.
+ *
+ * NOTE: DMA mapping is held in the tx until completed in the ring or
+ * the tx desc is freed without having been submitted to the ring
+ *
+ * This routine insures the following all the helper routine
+ * calls succeed.
+ */
+/* New API */
+static int build_verbs_tx_desc(
+ struct sdma_engine *sde,
+ struct hfi1_sge_state *ss,
+ u32 length,
+ struct verbs_txreq *tx,
+ struct ahg_ib_header *ahdr,
+ u64 pbc)
+{
+ int ret = 0;
+ struct hfi1_pio_header *phdr;
+ u16 hdrbytes = tx->hdr_dwords << 2;
+
+ phdr = &tx->phdr;
+ if (!ahdr->ahgcount) {
+ ret = sdma_txinit_ahg(
+ &tx->txreq,
+ ahdr->tx_flags,
+ hdrbytes + length,
+ ahdr->ahgidx,
+ 0,
+ NULL,
+ 0,
+ verbs_sdma_complete);
+ if (ret)
+ goto bail_txadd;
+ phdr->pbc = cpu_to_le64(pbc);
+ memcpy(&phdr->hdr, &ahdr->ibh, hdrbytes - sizeof(phdr->pbc));
+ /* add the header */
+ ret = sdma_txadd_kvaddr(
+ sde->dd,
+ &tx->txreq,
+ &tx->phdr,
+ tx->hdr_dwords << 2);
+ if (ret)
+ goto bail_txadd;
+ } else {
+ struct hfi1_other_headers *sohdr = &ahdr->ibh.u.oth;
+ struct hfi1_other_headers *dohdr = &phdr->hdr.u.oth;
+
+ /* needed in rc_send_complete() */
+ phdr->hdr.lrh[0] = ahdr->ibh.lrh[0];
+ if ((be16_to_cpu(phdr->hdr.lrh[0]) & 3) == HFI1_LRH_GRH) {
+ sohdr = &ahdr->ibh.u.l.oth;
+ dohdr = &phdr->hdr.u.l.oth;
+ }
+ /* opcode */
+ dohdr->bth[0] = sohdr->bth[0];
+ /* PSN/ACK */
+ dohdr->bth[2] = sohdr->bth[2];
+ ret = sdma_txinit_ahg(
+ &tx->txreq,
+ ahdr->tx_flags,
+ length,
+ ahdr->ahgidx,
+ ahdr->ahgcount,
+ ahdr->ahgdesc,
+ hdrbytes,
+ verbs_sdma_complete);
+ if (ret)
+ goto bail_txadd;
+ }
+
+ /* add the ulp payload - if any. ss can be NULL for acks */
+ if (ss)
+ ret = build_verbs_ulp_payload(sde, ss, length, tx);
+bail_txadd:
+ return ret;
+}
+
+int hfi1_verbs_send_dma(struct hfi1_qp *qp, struct ahg_ib_header *ahdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc)
+{
+ struct hfi1_ibdev *dev = to_idev(qp->ibqp.device);
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ struct verbs_txreq *tx;
+ struct sdma_txreq *stx;
+ u64 pbc_flags = 0;
+ struct sdma_engine *sde;
+ u8 sc5 = qp->s_sc;
+ int ret;
+
+ if (!list_empty(&qp->s_iowait.tx_head)) {
+ stx = list_first_entry(
+ &qp->s_iowait.tx_head,
+ struct sdma_txreq,
+ list);
+ list_del_init(&stx->list);
+ tx = container_of(stx, struct verbs_txreq, txreq);
+ ret = sdma_send_txreq(tx->sde, &qp->s_iowait, stx);
+ if (unlikely(ret == -ECOMM))
+ goto bail_ecomm;
+ return ret;
+ }
+
+ tx = get_txreq(dev, qp);
+ if (IS_ERR(tx))
+ goto bail_tx;
+
+ if (!qp->s_hdr->sde) {
+ tx->sde = sde = qp_to_sdma_engine(qp, sc5);
+ if (!sde)
+ goto bail_no_sde;
+ } else
+ tx->sde = sde = qp->s_hdr->sde;
+
+ if (likely(pbc == 0)) {
+ u32 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
+ /* No vl15 here */
+ /* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
+ pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT;
+
+ pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen);
+ }
+ tx->wqe = qp->s_wqe;
+ tx->mr = qp->s_rdma_mr;
+ if (qp->s_rdma_mr)
+ qp->s_rdma_mr = NULL;
+ tx->hdr_dwords = hdrwords + 2;
+ ret = build_verbs_tx_desc(sde, ss, len, tx, ahdr, pbc);
+ if (unlikely(ret))
+ goto bail_build;
+ trace_output_ibhdr(dd_from_ibdev(qp->ibqp.device), &ahdr->ibh);
+ ret = sdma_send_txreq(sde, &qp->s_iowait, &tx->txreq);
+ if (unlikely(ret == -ECOMM))
+ goto bail_ecomm;
+ return ret;
+
+bail_no_sde:
+ hfi1_put_txreq(tx);
+bail_ecomm:
+ /* The current one got "sent" */
+ return 0;
+bail_build:
+ /* kmalloc or mapping fail */
+ hfi1_put_txreq(tx);
+ return wait_kmem(dev, qp);
+bail_tx:
+ return PTR_ERR(tx);
+}
+
+/*
+ * If we are now in the error state, return zero to flush the
+ * send work request.
+ */
+static int no_bufs_available(struct hfi1_qp *qp, struct send_context *sc)
+{
+ struct hfi1_devdata *dd = sc->dd;
+ struct hfi1_ibdev *dev = &dd->verbs_dev;
+ unsigned long flags;
+ int ret = 0;
+
+ /*
+ * Note that as soon as want_buffer() is called and
+ * possibly before it returns, sc_piobufavail()
+ * could be called. Therefore, put QP on the I/O wait list before
+ * enabling the PIO avail interrupt.
+ */
+ spin_lock_irqsave(&qp->s_lock, flags);
+ if (ib_hfi1_state_ops[qp->state] & HFI1_PROCESS_RECV_OK) {
+ write_seqlock(&dev->iowait_lock);
+ if (list_empty(&qp->s_iowait.list)) {
+ struct hfi1_ibdev *dev = &dd->verbs_dev;
+ int was_empty;
+
+ dev->n_piowait++;
+ qp->s_flags |= HFI1_S_WAIT_PIO;
+ was_empty = list_empty(&sc->piowait);
+ list_add_tail(&qp->s_iowait.list, &sc->piowait);
+ trace_hfi1_qpsleep(qp, HFI1_S_WAIT_PIO);
+ atomic_inc(&qp->refcount);
+ /* counting: only call wantpiobuf_intr if first user */
+ if (was_empty)
+ hfi1_sc_wantpiobuf_intr(sc, 1);
+ }
+ write_sequnlock(&dev->iowait_lock);
+ qp->s_flags &= ~HFI1_S_BUSY;
+ ret = -EBUSY;
+ }
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ return ret;
+}
+
+struct send_context *qp_to_send_context(struct hfi1_qp *qp, u8 sc5)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
+ struct hfi1_pportdata *ppd = dd->pport + (qp->port_num - 1);
+ u8 vl;
+
+ vl = sc_to_vlt(dd, sc5);
+ if (vl >= ppd->vls_supported && vl != 15)
+ return NULL;
+ return dd->vld[vl].sc;
+}
+
+int hfi1_verbs_send_pio(struct hfi1_qp *qp, struct ahg_ib_header *ahdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc)
+{
+ struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u32 *hdr = (u32 *)&ahdr->ibh;
+ u64 pbc_flags = 0;
+ u32 sc5;
+ unsigned long flags = 0;
+ struct send_context *sc;
+ struct pio_buf *pbuf;
+ int wc_status = IB_WC_SUCCESS;
+
+ /* vl15 special case taken care of in ud.c */
+ sc5 = qp->s_sc;
+ sc = qp_to_send_context(qp, sc5);
+
+ if (!sc)
+ return -EINVAL;
+ if (likely(pbc == 0)) {
+ u32 vl = sc_to_vlt(dd_from_ibdev(qp->ibqp.device), sc5);
+ /* set PBC_DC_INFO bit (aka SC[4]) in pbc_flags */
+ pbc_flags |= (!!(sc5 & 0x10)) << PBC_DC_INFO_SHIFT;
+ pbc = create_pbc(ppd, pbc_flags, qp->srate_mbps, vl, plen);
+ }
+ pbuf = sc_buffer_alloc(sc, plen, NULL, NULL);
+ if (unlikely(pbuf == NULL)) {
+ if (ppd->host_link_state != HLS_UP_ACTIVE) {
+ /*
+ * If we have filled the PIO buffers to capacity and are
+ * not in an active state this request is not going to
+ * go out to so just complete it with an error or else a
+ * ULP or the core may be stuck waiting.
+ */
+ hfi1_cdbg(
+ PIO,
+ "alloc failed. state not active, completing");
+ wc_status = IB_WC_GENERAL_ERR;
+ goto pio_bail;
+ } else {
+ /*
+ * This is a normal occurrence. The PIO buffs are full
+ * up but we are still happily sending, well we could be
+ * so lets continue to queue the request.
+ */
+ hfi1_cdbg(PIO, "alloc failed. state active, queuing");
+ return no_bufs_available(qp, sc);
+ }
+ }
+
+ if (len == 0) {
+ pio_copy(ppd->dd, pbuf, pbc, hdr, hdrwords);
+ } else {
+ if (ss) {
+ seg_pio_copy_start(pbuf, pbc, hdr, hdrwords*4);
+ while (len) {
+ void *addr = ss->sge.vaddr;
+ u32 slen = ss->sge.length;
+
+ if (slen > len)
+ slen = len;
+ update_sge(ss, slen);
+ seg_pio_copy_mid(pbuf, addr, slen);
+ len -= slen;
+ }
+ seg_pio_copy_end(pbuf);
+ }
+ }
+
+ trace_output_ibhdr(dd_from_ibdev(qp->ibqp.device), &ahdr->ibh);
+
+ if (qp->s_rdma_mr) {
+ hfi1_put_mr(qp->s_rdma_mr);
+ qp->s_rdma_mr = NULL;
+ }
+
+pio_bail:
+ if (qp->s_wqe) {
+ spin_lock_irqsave(&qp->s_lock, flags);
+ hfi1_send_complete(qp, qp->s_wqe, wc_status);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ } else if (qp->ibqp.qp_type == IB_QPT_RC) {
+ spin_lock_irqsave(&qp->s_lock, flags);
+ hfi1_rc_send_complete(qp, &ahdr->ibh);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ }
+ return 0;
+}
+/*
+ * egress_pkey_matches_entry - return 1 if the pkey matches ent (ent
+ * being an entry from the ingress partition key table), return 0
+ * otherwise. Use the matching criteria for egress partition keys
+ * specified in the OPAv1 spec., section 9.1l.7.
+ */
+static inline int egress_pkey_matches_entry(u16 pkey, u16 ent)
+{
+ u16 mkey = pkey & PKEY_LOW_15_MASK;
+ u16 ment = ent & PKEY_LOW_15_MASK;
+
+ if (mkey == ment) {
+ /*
+ * If pkey[15] is set (full partition member),
+ * is bit 15 in the corresponding table element
+ * clear (limited member)?
+ */
+ if (pkey & PKEY_MEMBER_MASK)
+ return !!(ent & PKEY_MEMBER_MASK);
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * egress_pkey_check - return 0 if hdr's pkey matches according to the
+ * criteria in the OPAv1 spec., section 9.11.7.
+ */
+static inline int egress_pkey_check(struct hfi1_pportdata *ppd,
+ struct hfi1_ib_header *hdr,
+ struct hfi1_qp *qp)
+{
+ struct hfi1_other_headers *ohdr;
+ struct hfi1_devdata *dd;
+ int i = 0;
+ u16 pkey;
+ u8 lnh, sc5 = qp->s_sc;
+
+ if (!(ppd->part_enforce & HFI1_PART_ENFORCE_OUT))
+ return 0;
+
+ /* locate the pkey within the headers */
+ lnh = be16_to_cpu(hdr->lrh[0]) & 3;
+ if (lnh == HFI1_LRH_GRH)
+ ohdr = &hdr->u.l.oth;
+ else
+ ohdr = &hdr->u.oth;
+
+ pkey = (u16)be32_to_cpu(ohdr->bth[0]);
+
+ /* If SC15, pkey[0:14] must be 0x7fff */
+ if ((sc5 == 0xf) && ((pkey & PKEY_LOW_15_MASK) != PKEY_LOW_15_MASK))
+ goto bad;
+
+
+ /* Is the pkey = 0x0, or 0x8000? */
+ if ((pkey & PKEY_LOW_15_MASK) == 0)
+ goto bad;
+
+ /* The most likely matching pkey has index qp->s_pkey_index */
+ if (unlikely(!egress_pkey_matches_entry(pkey,
+ ppd->pkeys[qp->s_pkey_index]))) {
+ /* no match - try the entire table */
+ for (; i < MAX_PKEY_VALUES; i++) {
+ if (egress_pkey_matches_entry(pkey, ppd->pkeys[i]))
+ break;
+ }
+ }
+
+ if (i < MAX_PKEY_VALUES)
+ return 0;
+bad:
+ incr_cntr64(&ppd->port_xmit_constraint_errors);
+ dd = ppd->dd;
+ if (!(dd->err_info_xmit_constraint.status & OPA_EI_STATUS_SMASK)) {
+ u16 slid = be16_to_cpu(hdr->lrh[3]);
+
+ dd->err_info_xmit_constraint.status |= OPA_EI_STATUS_SMASK;
+ dd->err_info_xmit_constraint.slid = slid;
+ dd->err_info_xmit_constraint.pkey = pkey;
+ }
+ return 1;
+}
+
+/**
+ * hfi1_verbs_send - send a packet
+ * @qp: the QP to send on
+ * @ahdr: the packet header
+ * @hdrwords: the number of 32-bit words in the header
+ * @ss: the SGE to send
+ * @len: the length of the packet in bytes
+ *
+ * Return zero if packet is sent or queued OK.
+ * Return non-zero and clear qp->s_flags HFI1_S_BUSY otherwise.
+ */
+int hfi1_verbs_send(struct hfi1_qp *qp, struct ahg_ib_header *ahdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device);
+ u32 plen;
+ int ret;
+ int pio = 0;
+ unsigned long flags = 0;
+ u32 dwords = (len + 3) >> 2;
+
+ /*
+ * VL15 packets (IB_QPT_SMI) will always use PIO, so we
+ * can defer SDMA restart until link goes ACTIVE without
+ * worrying about just how we got there.
+ */
+ if ((qp->ibqp.qp_type == IB_QPT_SMI) ||
+ !(dd->flags & HFI1_HAS_SEND_DMA))
+ pio = 1;
+
+ ret = egress_pkey_check(dd->pport, &ahdr->ibh, qp);
+ if (unlikely(ret)) {
+ /*
+ * The value we are returning here does not get propagated to
+ * the verbs caller. Thus we need to complete the request with
+ * error otherwise the caller could be sitting waiting on the
+ * completion event. Only do this for PIO. SDMA has its own
+ * mechanism for handling the errors. So for SDMA we can just
+ * return.
+ */
+ if (pio) {
+ hfi1_cdbg(PIO, "%s() Failed. Completing with err",
+ __func__);
+ spin_lock_irqsave(&qp->s_lock, flags);
+ hfi1_send_complete(qp, qp->s_wqe, IB_WC_GENERAL_ERR);
+ spin_unlock_irqrestore(&qp->s_lock, flags);
+ }
+ return -EINVAL;
+ }
+
+ /*
+ * Calculate the send buffer trigger address.
+ * The +2 counts for the pbc control qword
+ */
+ plen = hdrwords + dwords + 2;
+
+ if (pio) {
+ ret = dd->process_pio_send(
+ qp, ahdr, hdrwords, ss, len, plen, dwords, 0);
+ } else {
+#ifdef CONFIG_SDMA_VERBOSITY
+ dd_dev_err(dd, "CONFIG SDMA %s:%d %s()\n",
+ slashstrip(__FILE__), __LINE__, __func__);
+ dd_dev_err(dd, "SDMA hdrwords = %u, len = %u\n", hdrwords, len);
+#endif
+ ret = dd->process_dma_send(
+ qp, ahdr, hdrwords, ss, len, plen, dwords, 0);
+ }
+
+ return ret;
+}
+
+static int query_device(struct ib_device *ibdev,
+ struct ib_device_attr *props,
+ struct ib_udata *uhw)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_ibdev *dev = to_idev(ibdev);
+
+ if (uhw->inlen || uhw->outlen)
+ return -EINVAL;
+ memset(props, 0, sizeof(*props));
+
+ props->device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
+ IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
+ IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN |
+ IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE;
+
+ props->page_size_cap = PAGE_SIZE;
+ props->vendor_id =
+ dd->oui1 << 16 | dd->oui2 << 8 | dd->oui3;
+ props->vendor_part_id = dd->pcidev->device;
+ props->hw_ver = dd->minrev;
+ props->sys_image_guid = ib_hfi1_sys_image_guid;
+ props->max_mr_size = ~0ULL;
+ props->max_qp = hfi1_max_qps;
+ props->max_qp_wr = hfi1_max_qp_wrs;
+ props->max_sge = hfi1_max_sges;
+ props->max_sge_rd = hfi1_max_sges;
+ props->max_cq = hfi1_max_cqs;
+ props->max_ah = hfi1_max_ahs;
+ props->max_cqe = hfi1_max_cqes;
+ props->max_mr = dev->lk_table.max;
+ props->max_fmr = dev->lk_table.max;
+ props->max_map_per_fmr = 32767;
+ props->max_pd = hfi1_max_pds;
+ props->max_qp_rd_atom = HFI1_MAX_RDMA_ATOMIC;
+ props->max_qp_init_rd_atom = 255;
+ /* props->max_res_rd_atom */
+ props->max_srq = hfi1_max_srqs;
+ props->max_srq_wr = hfi1_max_srq_wrs;
+ props->max_srq_sge = hfi1_max_srq_sges;
+ /* props->local_ca_ack_delay */
+ props->atomic_cap = IB_ATOMIC_GLOB;
+ props->max_pkeys = hfi1_get_npkeys(dd);
+ props->max_mcast_grp = hfi1_max_mcast_grps;
+ props->max_mcast_qp_attach = hfi1_max_mcast_qp_attached;
+ props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
+ props->max_mcast_grp;
+
+ return 0;
+}
+
+static inline u16 opa_speed_to_ib(u16 in)
+{
+ u16 out = 0;
+
+ if (in & OPA_LINK_SPEED_25G)
+ out |= IB_SPEED_EDR;
+ if (in & OPA_LINK_SPEED_12_5G)
+ out |= IB_SPEED_FDR;
+
+ return out;
+}
+
+/*
+ * Convert a single OPA link width (no multiple flags) to an IB value.
+ * A zero OPA link width means link down, which means the IB width value
+ * is a don't care.
+ */
+static inline u16 opa_width_to_ib(u16 in)
+{
+ switch (in) {
+ case OPA_LINK_WIDTH_1X:
+ /* map 2x and 3x to 1x as they don't exist in IB */
+ case OPA_LINK_WIDTH_2X:
+ case OPA_LINK_WIDTH_3X:
+ return IB_WIDTH_1X;
+ default: /* link down or unknown, return our largest width */
+ case OPA_LINK_WIDTH_4X:
+ return IB_WIDTH_4X;
+ }
+}
+
+static int query_port(struct ib_device *ibdev, u8 port,
+ struct ib_port_attr *props)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ u16 lid = ppd->lid;
+
+ memset(props, 0, sizeof(*props));
+ props->lid = lid ? lid : 0;
+ props->lmc = ppd->lmc;
+ props->sm_lid = ibp->sm_lid;
+ props->sm_sl = ibp->sm_sl;
+ /* OPA logical states match IB logical states */
+ props->state = driver_lstate(ppd);
+ props->phys_state = hfi1_ibphys_portstate(ppd);
+ props->port_cap_flags = ibp->port_cap_flags;
+ props->gid_tbl_len = HFI1_GUIDS_PER_PORT;
+ props->max_msg_sz = 0x80000000;
+ props->pkey_tbl_len = hfi1_get_npkeys(dd);
+ props->bad_pkey_cntr = ibp->pkey_violations;
+ props->qkey_viol_cntr = ibp->qkey_violations;
+ props->active_width = (u8)opa_width_to_ib(ppd->link_width_active);
+ /* see rate_show() in ib core/sysfs.c */
+ props->active_speed = (u8)opa_speed_to_ib(ppd->link_speed_active);
+ props->max_vl_num = ppd->vls_supported;
+ props->init_type_reply = 0;
+
+ /* Once we are a "first class" citizen and have added the OPA MTUs to
+ * the core we can advertise the larger MTU enum to the ULPs, for now
+ * advertise only 4K.
+ *
+ * Those applications which are either OPA aware or pass the MTU enum
+ * from the Path Records to us will get the new 8k MTU. Those that
+ * attempt to process the MTU enum may fail in various ways.
+ */
+ props->max_mtu = mtu_to_enum((!valid_ib_mtu(hfi1_max_mtu) ?
+ 4096 : hfi1_max_mtu), IB_MTU_4096);
+ props->active_mtu = !valid_ib_mtu(ppd->ibmtu) ? props->max_mtu :
+ mtu_to_enum(ppd->ibmtu, IB_MTU_2048);
+ props->subnet_timeout = ibp->subnet_timeout;
+
+ return 0;
+}
+
+static int port_immutable(struct ib_device *ibdev, u8 port_num,
+ struct ib_port_immutable *immutable)
+{
+ struct ib_port_attr attr;
+ int err;
+
+ err = query_port(ibdev, port_num, &attr);
+ if (err)
+ return err;
+
+ memset(immutable, 0, sizeof(*immutable));
+
+ immutable->pkey_tbl_len = attr.pkey_tbl_len;
+ immutable->gid_tbl_len = attr.gid_tbl_len;
+ immutable->core_cap_flags = RDMA_CORE_PORT_INTEL_OPA;
+ immutable->max_mad_size = OPA_MGMT_MAD_SIZE;
+
+ return 0;
+}
+
+static int modify_device(struct ib_device *device,
+ int device_modify_mask,
+ struct ib_device_modify *device_modify)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(device);
+ unsigned i;
+ int ret;
+
+ if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
+ IB_DEVICE_MODIFY_NODE_DESC)) {
+ ret = -EOPNOTSUPP;
+ goto bail;
+ }
+
+ if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) {
+ memcpy(device->node_desc, device_modify->node_desc, 64);
+ for (i = 0; i < dd->num_pports; i++) {
+ struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
+
+ hfi1_node_desc_chg(ibp);
+ }
+ }
+
+ if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) {
+ ib_hfi1_sys_image_guid =
+ cpu_to_be64(device_modify->sys_image_guid);
+ for (i = 0; i < dd->num_pports; i++) {
+ struct hfi1_ibport *ibp = &dd->pport[i].ibport_data;
+
+ hfi1_sys_guid_chg(ibp);
+ }
+ }
+
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+static int modify_port(struct ib_device *ibdev, u8 port,
+ int port_modify_mask, struct ib_port_modify *props)
+{
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+ int ret = 0;
+
+ ibp->port_cap_flags |= props->set_port_cap_mask;
+ ibp->port_cap_flags &= ~props->clr_port_cap_mask;
+ if (props->set_port_cap_mask || props->clr_port_cap_mask)
+ hfi1_cap_mask_chg(ibp);
+ if (port_modify_mask & IB_PORT_SHUTDOWN) {
+ set_link_down_reason(ppd, OPA_LINKDOWN_REASON_UNKNOWN, 0,
+ OPA_LINKDOWN_REASON_UNKNOWN);
+ ret = set_link_state(ppd, HLS_DN_DOWNDEF);
+ }
+ if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
+ ibp->qkey_violations = 0;
+ return ret;
+}
+
+static int query_gid(struct ib_device *ibdev, u8 port,
+ int index, union ib_gid *gid)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ int ret = 0;
+
+ if (!port || port > dd->num_pports)
+ ret = -EINVAL;
+ else {
+ struct hfi1_ibport *ibp = to_iport(ibdev, port);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+
+ gid->global.subnet_prefix = ibp->gid_prefix;
+ if (index == 0)
+ gid->global.interface_id = cpu_to_be64(ppd->guid);
+ else if (index < HFI1_GUIDS_PER_PORT)
+ gid->global.interface_id = ibp->guids[index - 1];
+ else
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static struct ib_pd *alloc_pd(struct ib_device *ibdev,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct hfi1_ibdev *dev = to_idev(ibdev);
+ struct hfi1_pd *pd;
+ struct ib_pd *ret;
+
+ /*
+ * This is actually totally arbitrary. Some correctness tests
+ * assume there's a maximum number of PDs that can be allocated.
+ * We don't actually have this limit, but we fail the test if
+ * we allow allocations of more than we report for this value.
+ */
+
+ pd = kmalloc(sizeof(*pd), GFP_KERNEL);
+ if (!pd) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ spin_lock(&dev->n_pds_lock);
+ if (dev->n_pds_allocated == hfi1_max_pds) {
+ spin_unlock(&dev->n_pds_lock);
+ kfree(pd);
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ dev->n_pds_allocated++;
+ spin_unlock(&dev->n_pds_lock);
+
+ /* ib_alloc_pd() will initialize pd->ibpd. */
+ pd->user = udata != NULL;
+
+ ret = &pd->ibpd;
+
+bail:
+ return ret;
+}
+
+static int dealloc_pd(struct ib_pd *ibpd)
+{
+ struct hfi1_pd *pd = to_ipd(ibpd);
+ struct hfi1_ibdev *dev = to_idev(ibpd->device);
+
+ spin_lock(&dev->n_pds_lock);
+ dev->n_pds_allocated--;
+ spin_unlock(&dev->n_pds_lock);
+
+ kfree(pd);
+
+ return 0;
+}
+
+/*
+ * convert ah port,sl to sc
+ */
+u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah)
+{
+ struct hfi1_ibport *ibp = to_iport(ibdev, ah->port_num);
+
+ return ibp->sl_to_sc[ah->sl];
+}
+
+int hfi1_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr)
+{
+ struct hfi1_ibport *ibp;
+ struct hfi1_pportdata *ppd;
+ struct hfi1_devdata *dd;
+ u8 sc5;
+
+ /* A multicast address requires a GRH (see ch. 8.4.1). */
+ if (ah_attr->dlid >= HFI1_MULTICAST_LID_BASE &&
+ ah_attr->dlid != HFI1_PERMISSIVE_LID &&
+ !(ah_attr->ah_flags & IB_AH_GRH))
+ goto bail;
+ if ((ah_attr->ah_flags & IB_AH_GRH) &&
+ ah_attr->grh.sgid_index >= HFI1_GUIDS_PER_PORT)
+ goto bail;
+ if (ah_attr->dlid == 0)
+ goto bail;
+ if (ah_attr->port_num < 1 ||
+ ah_attr->port_num > ibdev->phys_port_cnt)
+ goto bail;
+ if (ah_attr->static_rate != IB_RATE_PORT_CURRENT &&
+ ib_rate_to_mbps(ah_attr->static_rate) < 0)
+ goto bail;
+ if (ah_attr->sl >= OPA_MAX_SLS)
+ goto bail;
+ /* test the mapping for validity */
+ ibp = to_iport(ibdev, ah_attr->port_num);
+ ppd = ppd_from_ibp(ibp);
+ sc5 = ibp->sl_to_sc[ah_attr->sl];
+ dd = dd_from_ppd(ppd);
+ if (sc_to_vlt(dd, sc5) > num_vls && sc_to_vlt(dd, sc5) != 0xf)
+ goto bail;
+ return 0;
+bail:
+ return -EINVAL;
+}
+
+/**
+ * create_ah - create an address handle
+ * @pd: the protection domain
+ * @ah_attr: the attributes of the AH
+ *
+ * This may be called from interrupt context.
+ */
+static struct ib_ah *create_ah(struct ib_pd *pd,
+ struct ib_ah_attr *ah_attr)
+{
+ struct hfi1_ah *ah;
+ struct ib_ah *ret;
+ struct hfi1_ibdev *dev = to_idev(pd->device);
+ unsigned long flags;
+
+ if (hfi1_check_ah(pd->device, ah_attr)) {
+ ret = ERR_PTR(-EINVAL);
+ goto bail;
+ }
+
+ ah = kmalloc(sizeof(*ah), GFP_ATOMIC);
+ if (!ah) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ spin_lock_irqsave(&dev->n_ahs_lock, flags);
+ if (dev->n_ahs_allocated == hfi1_max_ahs) {
+ spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
+ kfree(ah);
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ dev->n_ahs_allocated++;
+ spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
+
+ /* ib_create_ah() will initialize ah->ibah. */
+ ah->attr = *ah_attr;
+ atomic_set(&ah->refcount, 0);
+
+ ret = &ah->ibah;
+
+bail:
+ return ret;
+}
+
+struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid)
+{
+ struct ib_ah_attr attr;
+ struct ib_ah *ah = ERR_PTR(-EINVAL);
+ struct hfi1_qp *qp0;
+
+ memset(&attr, 0, sizeof(attr));
+ attr.dlid = dlid;
+ attr.port_num = ppd_from_ibp(ibp)->port;
+ rcu_read_lock();
+ qp0 = rcu_dereference(ibp->qp[0]);
+ if (qp0)
+ ah = ib_create_ah(qp0->ibqp.pd, &attr);
+ rcu_read_unlock();
+ return ah;
+}
+
+/**
+ * destroy_ah - destroy an address handle
+ * @ibah: the AH to destroy
+ *
+ * This may be called from interrupt context.
+ */
+static int destroy_ah(struct ib_ah *ibah)
+{
+ struct hfi1_ibdev *dev = to_idev(ibah->device);
+ struct hfi1_ah *ah = to_iah(ibah);
+ unsigned long flags;
+
+ if (atomic_read(&ah->refcount) != 0)
+ return -EBUSY;
+
+ spin_lock_irqsave(&dev->n_ahs_lock, flags);
+ dev->n_ahs_allocated--;
+ spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
+
+ kfree(ah);
+
+ return 0;
+}
+
+static int modify_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
+{
+ struct hfi1_ah *ah = to_iah(ibah);
+
+ if (hfi1_check_ah(ibah->device, ah_attr))
+ return -EINVAL;
+
+ ah->attr = *ah_attr;
+
+ return 0;
+}
+
+static int query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
+{
+ struct hfi1_ah *ah = to_iah(ibah);
+
+ *ah_attr = ah->attr;
+
+ return 0;
+}
+
+/**
+ * hfi1_get_npkeys - return the size of the PKEY table for context 0
+ * @dd: the hfi1_ib device
+ */
+unsigned hfi1_get_npkeys(struct hfi1_devdata *dd)
+{
+ return ARRAY_SIZE(dd->pport[0].pkeys);
+}
+
+static int query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+ u16 *pkey)
+{
+ struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
+ int ret;
+
+ if (index >= hfi1_get_npkeys(dd)) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ *pkey = hfi1_get_pkey(to_iport(ibdev, port), index);
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+/**
+ * alloc_ucontext - allocate a ucontest
+ * @ibdev: the infiniband device
+ * @udata: not used by the driver
+ */
+
+static struct ib_ucontext *alloc_ucontext(struct ib_device *ibdev,
+ struct ib_udata *udata)
+{
+ struct hfi1_ucontext *context;
+ struct ib_ucontext *ret;
+
+ context = kmalloc(sizeof(*context), GFP_KERNEL);
+ if (!context) {
+ ret = ERR_PTR(-ENOMEM);
+ goto bail;
+ }
+
+ ret = &context->ibucontext;
+
+bail:
+ return ret;
+}
+
+static int dealloc_ucontext(struct ib_ucontext *context)
+{
+ kfree(to_iucontext(context));
+ return 0;
+}
+
+static void init_ibport(struct hfi1_pportdata *ppd)
+{
+ struct hfi1_ibport *ibp = &ppd->ibport_data;
+ size_t sz = ARRAY_SIZE(ibp->sl_to_sc);
+ int i;
+
+ for (i = 0; i < sz; i++) {
+ ibp->sl_to_sc[i] = i;
+ ibp->sc_to_sl[i] = i;
+ }
+
+ spin_lock_init(&ibp->lock);
+ /* Set the prefix to the default value (see ch. 4.1.1) */
+ ibp->gid_prefix = IB_DEFAULT_GID_PREFIX;
+ ibp->sm_lid = 0;
+ /* Below should only set bits defined in OPA PortInfo.CapabilityMask */
+ ibp->port_cap_flags = IB_PORT_AUTO_MIGR_SUP |
+ IB_PORT_CAP_MASK_NOTICE_SUP;
+ ibp->pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
+ ibp->pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
+ ibp->pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
+ ibp->pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
+ ibp->pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT;
+
+ RCU_INIT_POINTER(ibp->qp[0], NULL);
+ RCU_INIT_POINTER(ibp->qp[1], NULL);
+}
+
+static void verbs_txreq_kmem_cache_ctor(void *obj)
+{
+ struct verbs_txreq *tx = (struct verbs_txreq *)obj;
+
+ memset(tx, 0, sizeof(*tx));
+}
+
+/**
+ * hfi1_register_ib_device - register our device with the infiniband core
+ * @dd: the device data structure
+ * Return 0 if successful, errno if unsuccessful.
+ */
+int hfi1_register_ib_device(struct hfi1_devdata *dd)
+{
+ struct hfi1_ibdev *dev = &dd->verbs_dev;
+ struct ib_device *ibdev = &dev->ibdev;
+ struct hfi1_pportdata *ppd = dd->pport;
+ unsigned i, lk_tab_size;
+ int ret;
+ size_t lcpysz = IB_DEVICE_NAME_MAX;
+ u16 descq_cnt;
+
+ ret = hfi1_qp_init(dev);
+ if (ret)
+ goto err_qp_init;
+
+
+ for (i = 0; i < dd->num_pports; i++)
+ init_ibport(ppd + i);
+
+ /* Only need to initialize non-zero fields. */
+ spin_lock_init(&dev->n_pds_lock);
+ spin_lock_init(&dev->n_ahs_lock);
+ spin_lock_init(&dev->n_cqs_lock);
+ spin_lock_init(&dev->n_qps_lock);
+ spin_lock_init(&dev->n_srqs_lock);
+ spin_lock_init(&dev->n_mcast_grps_lock);
+ init_timer(&dev->mem_timer);
+ dev->mem_timer.function = mem_timer;
+ dev->mem_timer.data = (unsigned long) dev;
+
+ /*
+ * The top hfi1_lkey_table_size bits are used to index the
+ * table. The lower 8 bits can be owned by the user (copied from
+ * the LKEY). The remaining bits act as a generation number or tag.
+ */
+ spin_lock_init(&dev->lk_table.lock);
+ dev->lk_table.max = 1 << hfi1_lkey_table_size;
+ /* ensure generation is at least 4 bits (keys.c) */
+ if (hfi1_lkey_table_size > MAX_LKEY_TABLE_BITS) {
+ dd_dev_warn(dd, "lkey bits %u too large, reduced to %u\n",
+ hfi1_lkey_table_size, MAX_LKEY_TABLE_BITS);
+ hfi1_lkey_table_size = MAX_LKEY_TABLE_BITS;
+ }
+ lk_tab_size = dev->lk_table.max * sizeof(*dev->lk_table.table);
+ dev->lk_table.table = (struct hfi1_mregion __rcu **)
+ vmalloc(lk_tab_size);
+ if (dev->lk_table.table == NULL) {
+ ret = -ENOMEM;
+ goto err_lk;
+ }
+ RCU_INIT_POINTER(dev->dma_mr, NULL);
+ for (i = 0; i < dev->lk_table.max; i++)
+ RCU_INIT_POINTER(dev->lk_table.table[i], NULL);
+ INIT_LIST_HEAD(&dev->pending_mmaps);
+ spin_lock_init(&dev->pending_lock);
+ seqlock_init(&dev->iowait_lock);
+ dev->mmap_offset = PAGE_SIZE;
+ spin_lock_init(&dev->mmap_offset_lock);
+ INIT_LIST_HEAD(&dev->txwait);
+ INIT_LIST_HEAD(&dev->memwait);
+
+ descq_cnt = sdma_get_descq_cnt();
+
+ /* SLAB_HWCACHE_ALIGN for AHG */
+ dev->verbs_txreq_cache = kmem_cache_create("hfi1_vtxreq_cache",
+ sizeof(struct verbs_txreq),
+ 0, SLAB_HWCACHE_ALIGN,
+ verbs_txreq_kmem_cache_ctor);
+ if (!dev->verbs_txreq_cache) {
+ ret = -ENOMEM;
+ goto err_verbs_txreq;
+ }
+
+ /*
+ * The system image GUID is supposed to be the same for all
+ * HFIs in a single system but since there can be other
+ * device types in the system, we can't be sure this is unique.
+ */
+ if (!ib_hfi1_sys_image_guid)
+ ib_hfi1_sys_image_guid = cpu_to_be64(ppd->guid);
+ lcpysz = strlcpy(ibdev->name, class_name(), lcpysz);
+ strlcpy(ibdev->name + lcpysz, "_%d", IB_DEVICE_NAME_MAX - lcpysz);
+ ibdev->owner = THIS_MODULE;
+ ibdev->node_guid = cpu_to_be64(ppd->guid);
+ ibdev->uverbs_abi_ver = HFI1_UVERBS_ABI_VERSION;
+ ibdev->uverbs_cmd_mask =
+ (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
+ (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_AH) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_AH) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
+ (1ull << IB_USER_VERBS_CMD_REG_MR) |
+ (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
+ (1ull << IB_USER_VERBS_CMD_RESIZE_CQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
+ (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
+ (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
+ (1ull << IB_USER_VERBS_CMD_POST_SEND) |
+ (1ull << IB_USER_VERBS_CMD_POST_RECV) |
+ (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST) |
+ (1ull << IB_USER_VERBS_CMD_DETACH_MCAST) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
+ (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
+ ibdev->node_type = RDMA_NODE_IB_CA;
+ ibdev->phys_port_cnt = dd->num_pports;
+ ibdev->num_comp_vectors = 1;
+ ibdev->dma_device = &dd->pcidev->dev;
+ ibdev->query_device = query_device;
+ ibdev->modify_device = modify_device;
+ ibdev->query_port = query_port;
+ ibdev->modify_port = modify_port;
+ ibdev->query_pkey = query_pkey;
+ ibdev->query_gid = query_gid;
+ ibdev->alloc_ucontext = alloc_ucontext;
+ ibdev->dealloc_ucontext = dealloc_ucontext;
+ ibdev->alloc_pd = alloc_pd;
+ ibdev->dealloc_pd = dealloc_pd;
+ ibdev->create_ah = create_ah;
+ ibdev->destroy_ah = destroy_ah;
+ ibdev->modify_ah = modify_ah;
+ ibdev->query_ah = query_ah;
+ ibdev->create_srq = hfi1_create_srq;
+ ibdev->modify_srq = hfi1_modify_srq;
+ ibdev->query_srq = hfi1_query_srq;
+ ibdev->destroy_srq = hfi1_destroy_srq;
+ ibdev->create_qp = hfi1_create_qp;
+ ibdev->modify_qp = hfi1_modify_qp;
+ ibdev->query_qp = hfi1_query_qp;
+ ibdev->destroy_qp = hfi1_destroy_qp;
+ ibdev->post_send = post_send;
+ ibdev->post_recv = post_receive;
+ ibdev->post_srq_recv = hfi1_post_srq_receive;
+ ibdev->create_cq = hfi1_create_cq;
+ ibdev->destroy_cq = hfi1_destroy_cq;
+ ibdev->resize_cq = hfi1_resize_cq;
+ ibdev->poll_cq = hfi1_poll_cq;
+ ibdev->req_notify_cq = hfi1_req_notify_cq;
+ ibdev->get_dma_mr = hfi1_get_dma_mr;
+ ibdev->reg_phys_mr = hfi1_reg_phys_mr;
+ ibdev->reg_user_mr = hfi1_reg_user_mr;
+ ibdev->dereg_mr = hfi1_dereg_mr;
+ ibdev->alloc_fast_reg_page_list = hfi1_alloc_fast_reg_page_list;
+ ibdev->free_fast_reg_page_list = hfi1_free_fast_reg_page_list;
+ ibdev->alloc_fmr = hfi1_alloc_fmr;
+ ibdev->map_phys_fmr = hfi1_map_phys_fmr;
+ ibdev->unmap_fmr = hfi1_unmap_fmr;
+ ibdev->dealloc_fmr = hfi1_dealloc_fmr;
+ ibdev->attach_mcast = hfi1_multicast_attach;
+ ibdev->detach_mcast = hfi1_multicast_detach;
+ ibdev->process_mad = hfi1_process_mad;
+ ibdev->mmap = hfi1_mmap;
+ ibdev->dma_ops = &hfi1_dma_mapping_ops;
+ ibdev->get_port_immutable = port_immutable;
+
+ strncpy(ibdev->node_desc, init_utsname()->nodename,
+ sizeof(ibdev->node_desc));
+
+ ret = ib_register_device(ibdev, hfi1_create_port_files);
+ if (ret)
+ goto err_reg;
+
+ ret = hfi1_create_agents(dev);
+ if (ret)
+ goto err_agents;
+
+ ret = hfi1_verbs_register_sysfs(dd);
+ if (ret)
+ goto err_class;
+
+ goto bail;
+
+err_class:
+ hfi1_free_agents(dev);
+err_agents:
+ ib_unregister_device(ibdev);
+err_reg:
+err_verbs_txreq:
+ kmem_cache_destroy(dev->verbs_txreq_cache);
+ vfree(dev->lk_table.table);
+err_lk:
+ hfi1_qp_exit(dev);
+err_qp_init:
+ dd_dev_err(dd, "cannot register verbs: %d!\n", -ret);
+bail:
+ return ret;
+}
+
+void hfi1_unregister_ib_device(struct hfi1_devdata *dd)
+{
+ struct hfi1_ibdev *dev = &dd->verbs_dev;
+ struct ib_device *ibdev = &dev->ibdev;
+
+ hfi1_verbs_unregister_sysfs(dd);
+
+ hfi1_free_agents(dev);
+
+ ib_unregister_device(ibdev);
+
+ if (!list_empty(&dev->txwait))
+ dd_dev_err(dd, "txwait list not empty!\n");
+ if (!list_empty(&dev->memwait))
+ dd_dev_err(dd, "memwait list not empty!\n");
+ if (dev->dma_mr)
+ dd_dev_err(dd, "DMA MR not NULL!\n");
+
+ hfi1_qp_exit(dev);
+ del_timer_sync(&dev->mem_timer);
+ kmem_cache_destroy(dev->verbs_txreq_cache);
+ vfree(dev->lk_table.table);
+}
+
+/*
+ * This must be called with s_lock held.
+ */
+void hfi1_schedule_send(struct hfi1_qp *qp)
+{
+ if (hfi1_send_ok(qp)) {
+ struct hfi1_ibport *ibp =
+ to_iport(qp->ibqp.device, qp->port_num);
+ struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
+
+ iowait_schedule(&qp->s_iowait, ppd->hfi1_wq);
+ }
+}
+
+void hfi1_cnp_rcv(struct hfi1_packet *packet)
+{
+ struct hfi1_ibport *ibp = &packet->rcd->ppd->ibport_data;
+
+ if (packet->qp->ibqp.qp_type == IB_QPT_UC)
+ hfi1_uc_rcv(packet);
+ else if (packet->qp->ibqp.qp_type == IB_QPT_UD)
+ hfi1_ud_rcv(packet);
+ else
+ ibp->n_pkt_drops++;
+}
diff --git a/drivers/staging/rdma/hfi1/verbs.h b/drivers/staging/rdma/hfi1/verbs.h
new file mode 100644
index 0000000..8125361
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/verbs.h
@@ -0,0 +1,1149 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef HFI1_VERBS_H
+#define HFI1_VERBS_H
+
+#include <linux/types.h>
+#include <linux/seqlock.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/kref.h>
+#include <linux/workqueue.h>
+#include <linux/kthread.h>
+#include <linux/completion.h>
+#include <rdma/ib_pack.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_mad.h>
+
+struct hfi1_ctxtdata;
+struct hfi1_pportdata;
+struct hfi1_devdata;
+struct hfi1_packet;
+
+#include "iowait.h"
+
+#define HFI1_MAX_RDMA_ATOMIC 16
+#define HFI1_GUIDS_PER_PORT 5
+
+/*
+ * Increment this value if any changes that break userspace ABI
+ * compatibility are made.
+ */
+#define HFI1_UVERBS_ABI_VERSION 2
+
+/*
+ * Define an ib_cq_notify value that is not valid so we know when CQ
+ * notifications are armed.
+ */
+#define IB_CQ_NONE (IB_CQ_NEXT_COMP + 1)
+
+#define IB_SEQ_NAK (3 << 29)
+
+/* AETH NAK opcode values */
+#define IB_RNR_NAK 0x20
+#define IB_NAK_PSN_ERROR 0x60
+#define IB_NAK_INVALID_REQUEST 0x61
+#define IB_NAK_REMOTE_ACCESS_ERROR 0x62
+#define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
+#define IB_NAK_INVALID_RD_REQUEST 0x64
+
+/* Flags for checking QP state (see ib_hfi1_state_ops[]) */
+#define HFI1_POST_SEND_OK 0x01
+#define HFI1_POST_RECV_OK 0x02
+#define HFI1_PROCESS_RECV_OK 0x04
+#define HFI1_PROCESS_SEND_OK 0x08
+#define HFI1_PROCESS_NEXT_SEND_OK 0x10
+#define HFI1_FLUSH_SEND 0x20
+#define HFI1_FLUSH_RECV 0x40
+#define HFI1_PROCESS_OR_FLUSH_SEND \
+ (HFI1_PROCESS_SEND_OK | HFI1_FLUSH_SEND)
+
+/* IB Performance Manager status values */
+#define IB_PMA_SAMPLE_STATUS_DONE 0x00
+#define IB_PMA_SAMPLE_STATUS_STARTED 0x01
+#define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
+
+/* Mandatory IB performance counter select values. */
+#define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
+#define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
+#define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
+#define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
+#define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
+
+#define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
+
+#define IB_BTH_REQ_ACK (1 << 31)
+#define IB_BTH_SOLICITED (1 << 23)
+#define IB_BTH_MIG_REQ (1 << 22)
+
+#define IB_GRH_VERSION 6
+#define IB_GRH_VERSION_MASK 0xF
+#define IB_GRH_VERSION_SHIFT 28
+#define IB_GRH_TCLASS_MASK 0xFF
+#define IB_GRH_TCLASS_SHIFT 20
+#define IB_GRH_FLOW_MASK 0xFFFFF
+#define IB_GRH_FLOW_SHIFT 0
+#define IB_GRH_NEXT_HDR 0x1B
+
+#define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
+
+/* flags passed by hfi1_ib_rcv() */
+enum {
+ HFI1_HAS_GRH = (1 << 0),
+};
+
+struct ib_reth {
+ __be64 vaddr;
+ __be32 rkey;
+ __be32 length;
+} __packed;
+
+struct ib_atomic_eth {
+ __be32 vaddr[2]; /* unaligned so access as 2 32-bit words */
+ __be32 rkey;
+ __be64 swap_data;
+ __be64 compare_data;
+} __packed;
+
+union ib_ehdrs {
+ struct {
+ __be32 deth[2];
+ __be32 imm_data;
+ } ud;
+ struct {
+ struct ib_reth reth;
+ __be32 imm_data;
+ } rc;
+ struct {
+ __be32 aeth;
+ __be32 atomic_ack_eth[2];
+ } at;
+ __be32 imm_data;
+ __be32 aeth;
+ struct ib_atomic_eth atomic_eth;
+} __packed;
+
+struct hfi1_other_headers {
+ __be32 bth[3];
+ union ib_ehdrs u;
+} __packed;
+
+/*
+ * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes
+ * long (72 w/ imm_data). Only the first 56 bytes of the IB header
+ * will be in the eager header buffer. The remaining 12 or 16 bytes
+ * are in the data buffer.
+ */
+struct hfi1_ib_header {
+ __be16 lrh[4];
+ union {
+ struct {
+ struct ib_grh grh;
+ struct hfi1_other_headers oth;
+ } l;
+ struct hfi1_other_headers oth;
+ } u;
+} __packed;
+
+struct ahg_ib_header {
+ struct sdma_engine *sde;
+ u32 ahgdesc[2];
+ u16 tx_flags;
+ u8 ahgcount;
+ u8 ahgidx;
+ struct hfi1_ib_header ibh;
+};
+
+struct hfi1_pio_header {
+ __le64 pbc;
+ struct hfi1_ib_header hdr;
+} __packed;
+
+/*
+ * used for force cacheline alignment for AHG
+ */
+struct tx_pio_header {
+ struct hfi1_pio_header phdr;
+} ____cacheline_aligned;
+
+/*
+ * There is one struct hfi1_mcast for each multicast GID.
+ * All attached QPs are then stored as a list of
+ * struct hfi1_mcast_qp.
+ */
+struct hfi1_mcast_qp {
+ struct list_head list;
+ struct hfi1_qp *qp;
+};
+
+struct hfi1_mcast {
+ struct rb_node rb_node;
+ union ib_gid mgid;
+ struct list_head qp_list;
+ wait_queue_head_t wait;
+ atomic_t refcount;
+ int n_attached;
+};
+
+/* Protection domain */
+struct hfi1_pd {
+ struct ib_pd ibpd;
+ int user; /* non-zero if created from user space */
+};
+
+/* Address Handle */
+struct hfi1_ah {
+ struct ib_ah ibah;
+ struct ib_ah_attr attr;
+ atomic_t refcount;
+};
+
+/*
+ * This structure is used by hfi1_mmap() to validate an offset
+ * when an mmap() request is made. The vm_area_struct then uses
+ * this as its vm_private_data.
+ */
+struct hfi1_mmap_info {
+ struct list_head pending_mmaps;
+ struct ib_ucontext *context;
+ void *obj;
+ __u64 offset;
+ struct kref ref;
+ unsigned size;
+};
+
+/*
+ * This structure is used to contain the head pointer, tail pointer,
+ * and completion queue entries as a single memory allocation so
+ * it can be mmap'ed into user space.
+ */
+struct hfi1_cq_wc {
+ u32 head; /* index of next entry to fill */
+ u32 tail; /* index of next ib_poll_cq() entry */
+ union {
+ /* these are actually size ibcq.cqe + 1 */
+ struct ib_uverbs_wc uqueue[0];
+ struct ib_wc kqueue[0];
+ };
+};
+
+/*
+ * The completion queue structure.
+ */
+struct hfi1_cq {
+ struct ib_cq ibcq;
+ struct kthread_work comptask;
+ struct hfi1_devdata *dd;
+ spinlock_t lock; /* protect changes in this struct */
+ u8 notify;
+ u8 triggered;
+ struct hfi1_cq_wc *queue;
+ struct hfi1_mmap_info *ip;
+};
+
+/*
+ * A segment is a linear region of low physical memory.
+ * Used by the verbs layer.
+ */
+struct hfi1_seg {
+ void *vaddr;
+ size_t length;
+};
+
+/* The number of hfi1_segs that fit in a page. */
+#define HFI1_SEGSZ (PAGE_SIZE / sizeof(struct hfi1_seg))
+
+struct hfi1_segarray {
+ struct hfi1_seg segs[HFI1_SEGSZ];
+};
+
+struct hfi1_mregion {
+ struct ib_pd *pd; /* shares refcnt of ibmr.pd */
+ u64 user_base; /* User's address for this region */
+ u64 iova; /* IB start address of this region */
+ size_t length;
+ u32 lkey;
+ u32 offset; /* offset (bytes) to start of region */
+ int access_flags;
+ u32 max_segs; /* number of hfi1_segs in all the arrays */
+ u32 mapsz; /* size of the map array */
+ u8 page_shift; /* 0 - non unform/non powerof2 sizes */
+ u8 lkey_published; /* in global table */
+ struct completion comp; /* complete when refcount goes to zero */
+ atomic_t refcount;
+ struct hfi1_segarray *map[0]; /* the segments */
+};
+
+/*
+ * These keep track of the copy progress within a memory region.
+ * Used by the verbs layer.
+ */
+struct hfi1_sge {
+ struct hfi1_mregion *mr;
+ void *vaddr; /* kernel virtual address of segment */
+ u32 sge_length; /* length of the SGE */
+ u32 length; /* remaining length of the segment */
+ u16 m; /* current index: mr->map[m] */
+ u16 n; /* current index: mr->map[m]->segs[n] */
+};
+
+/* Memory region */
+struct hfi1_mr {
+ struct ib_mr ibmr;
+ struct ib_umem *umem;
+ struct hfi1_mregion mr; /* must be last */
+};
+
+/*
+ * Send work request queue entry.
+ * The size of the sg_list is determined when the QP is created and stored
+ * in qp->s_max_sge.
+ */
+struct hfi1_swqe {
+ struct ib_send_wr wr; /* don't use wr.sg_list */
+ u32 psn; /* first packet sequence number */
+ u32 lpsn; /* last packet sequence number */
+ u32 ssn; /* send sequence number */
+ u32 length; /* total length of data in sg_list */
+ struct hfi1_sge sg_list[0];
+};
+
+/*
+ * Receive work request queue entry.
+ * The size of the sg_list is determined when the QP (or SRQ) is created
+ * and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
+ */
+struct hfi1_rwqe {
+ u64 wr_id;
+ u8 num_sge;
+ struct ib_sge sg_list[0];
+};
+
+/*
+ * This structure is used to contain the head pointer, tail pointer,
+ * and receive work queue entries as a single memory allocation so
+ * it can be mmap'ed into user space.
+ * Note that the wq array elements are variable size so you can't
+ * just index into the array to get the N'th element;
+ * use get_rwqe_ptr() instead.
+ */
+struct hfi1_rwq {
+ u32 head; /* new work requests posted to the head */
+ u32 tail; /* receives pull requests from here. */
+ struct hfi1_rwqe wq[0];
+};
+
+struct hfi1_rq {
+ struct hfi1_rwq *wq;
+ u32 size; /* size of RWQE array */
+ u8 max_sge;
+ /* protect changes in this struct */
+ spinlock_t lock ____cacheline_aligned_in_smp;
+};
+
+struct hfi1_srq {
+ struct ib_srq ibsrq;
+ struct hfi1_rq rq;
+ struct hfi1_mmap_info *ip;
+ /* send signal when number of RWQEs < limit */
+ u32 limit;
+};
+
+struct hfi1_sge_state {
+ struct hfi1_sge *sg_list; /* next SGE to be used if any */
+ struct hfi1_sge sge; /* progress state for the current SGE */
+ u32 total_len;
+ u8 num_sge;
+};
+
+/*
+ * This structure holds the information that the send tasklet needs
+ * to send a RDMA read response or atomic operation.
+ */
+struct hfi1_ack_entry {
+ u8 opcode;
+ u8 sent;
+ u32 psn;
+ u32 lpsn;
+ union {
+ struct hfi1_sge rdma_sge;
+ u64 atomic_data;
+ };
+};
+
+/*
+ * Variables prefixed with s_ are for the requester (sender).
+ * Variables prefixed with r_ are for the responder (receiver).
+ * Variables prefixed with ack_ are for responder replies.
+ *
+ * Common variables are protected by both r_rq.lock and s_lock in that order
+ * which only happens in modify_qp() or changing the QP 'state'.
+ */
+struct hfi1_qp {
+ struct ib_qp ibqp;
+ /* read mostly fields above and below */
+ struct ib_ah_attr remote_ah_attr;
+ struct ib_ah_attr alt_ah_attr;
+ struct hfi1_qp __rcu *next; /* link list for QPN hash table */
+ struct hfi1_swqe *s_wq; /* send work queue */
+ struct hfi1_mmap_info *ip;
+ struct ahg_ib_header *s_hdr; /* next packet header to send */
+ u8 s_sc; /* SC[0..4] for next packet */
+ unsigned long timeout_jiffies; /* computed from timeout */
+
+ enum ib_mtu path_mtu;
+ int srate_mbps; /* s_srate (below) converted to Mbit/s */
+ u32 remote_qpn;
+ u32 pmtu; /* decoded from path_mtu */
+ u32 qkey; /* QKEY for this QP (for UD or RD) */
+ u32 s_size; /* send work queue size */
+ u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */
+ u32 s_ahgpsn; /* set to the psn in the copy of the header */
+
+ u8 state; /* QP state */
+ u8 allowed_ops; /* high order bits of allowed opcodes */
+ u8 qp_access_flags;
+ u8 alt_timeout; /* Alternate path timeout for this QP */
+ u8 timeout; /* Timeout for this QP */
+ u8 s_srate;
+ u8 s_mig_state;
+ u8 port_num;
+ u8 s_pkey_index; /* PKEY index to use */
+ u8 s_alt_pkey_index; /* Alternate path PKEY index to use */
+ u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */
+ u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */
+ u8 s_retry_cnt; /* number of times to retry */
+ u8 s_rnr_retry_cnt;
+ u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */
+ u8 s_max_sge; /* size of s_wq->sg_list */
+ u8 s_draining;
+
+ /* start of read/write fields */
+ atomic_t refcount ____cacheline_aligned_in_smp;
+ wait_queue_head_t wait;
+
+
+ struct hfi1_ack_entry s_ack_queue[HFI1_MAX_RDMA_ATOMIC + 1]
+ ____cacheline_aligned_in_smp;
+ struct hfi1_sge_state s_rdma_read_sge;
+
+ spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */
+ unsigned long r_aflags;
+ u64 r_wr_id; /* ID for current receive WQE */
+ u32 r_ack_psn; /* PSN for next ACK or atomic ACK */
+ u32 r_len; /* total length of r_sge */
+ u32 r_rcv_len; /* receive data len processed */
+ u32 r_psn; /* expected rcv packet sequence number */
+ u32 r_msn; /* message sequence number */
+
+ u8 r_state; /* opcode of last packet received */
+ u8 r_flags;
+ u8 r_head_ack_queue; /* index into s_ack_queue[] */
+
+ struct list_head rspwait; /* link for waiting to respond */
+
+ struct hfi1_sge_state r_sge; /* current receive data */
+ struct hfi1_rq r_rq; /* receive work queue */
+
+ spinlock_t s_lock ____cacheline_aligned_in_smp;
+ struct hfi1_sge_state *s_cur_sge;
+ u32 s_flags;
+ struct hfi1_swqe *s_wqe;
+ struct hfi1_sge_state s_sge; /* current send request data */
+ struct hfi1_mregion *s_rdma_mr;
+ struct sdma_engine *s_sde; /* current sde */
+ u32 s_cur_size; /* size of send packet in bytes */
+ u32 s_len; /* total length of s_sge */
+ u32 s_rdma_read_len; /* total length of s_rdma_read_sge */
+ u32 s_next_psn; /* PSN for next request */
+ u32 s_last_psn; /* last response PSN processed */
+ u32 s_sending_psn; /* lowest PSN that is being sent */
+ u32 s_sending_hpsn; /* highest PSN that is being sent */
+ u32 s_psn; /* current packet sequence number */
+ u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */
+ u32 s_ack_psn; /* PSN for acking sends and RDMA writes */
+ u32 s_head; /* new entries added here */
+ u32 s_tail; /* next entry to process */
+ u32 s_cur; /* current work queue entry */
+ u32 s_acked; /* last un-ACK'ed entry */
+ u32 s_last; /* last completed entry */
+ u32 s_ssn; /* SSN of tail entry */
+ u32 s_lsn; /* limit sequence number (credit) */
+ u16 s_hdrwords; /* size of s_hdr in 32 bit words */
+ u16 s_rdma_ack_cnt;
+ s8 s_ahgidx;
+ u8 s_state; /* opcode of last packet sent */
+ u8 s_ack_state; /* opcode of packet to ACK */
+ u8 s_nak_state; /* non-zero if NAK is pending */
+ u8 r_nak_state; /* non-zero if NAK is pending */
+ u8 s_retry; /* requester retry counter */
+ u8 s_rnr_retry; /* requester RNR retry counter */
+ u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */
+ u8 s_tail_ack_queue; /* index into s_ack_queue[] */
+
+ struct hfi1_sge_state s_ack_rdma_sge;
+ struct timer_list s_timer;
+
+ struct iowait s_iowait;
+
+ struct hfi1_sge r_sg_list[0] /* verified SGEs */
+ ____cacheline_aligned_in_smp;
+};
+
+/*
+ * Atomic bit definitions for r_aflags.
+ */
+#define HFI1_R_WRID_VALID 0
+#define HFI1_R_REWIND_SGE 1
+
+/*
+ * Bit definitions for r_flags.
+ */
+#define HFI1_R_REUSE_SGE 0x01
+#define HFI1_R_RDMAR_SEQ 0x02
+#define HFI1_R_RSP_NAK 0x04
+#define HFI1_R_RSP_SEND 0x08
+#define HFI1_R_COMM_EST 0x10
+
+/*
+ * Bit definitions for s_flags.
+ *
+ * HFI1_S_SIGNAL_REQ_WR - set if QP send WRs contain completion signaled
+ * HFI1_S_BUSY - send tasklet is processing the QP
+ * HFI1_S_TIMER - the RC retry timer is active
+ * HFI1_S_ACK_PENDING - an ACK is waiting to be sent after RDMA read/atomics
+ * HFI1_S_WAIT_FENCE - waiting for all prior RDMA read or atomic SWQEs
+ * before processing the next SWQE
+ * HFI1_S_WAIT_RDMAR - waiting for a RDMA read or atomic SWQE to complete
+ * before processing the next SWQE
+ * HFI1_S_WAIT_RNR - waiting for RNR timeout
+ * HFI1_S_WAIT_SSN_CREDIT - waiting for RC credits to process next SWQE
+ * HFI1_S_WAIT_DMA - waiting for send DMA queue to drain before generating
+ * next send completion entry not via send DMA
+ * HFI1_S_WAIT_PIO - waiting for a send buffer to be available
+ * HFI1_S_WAIT_TX - waiting for a struct verbs_txreq to be available
+ * HFI1_S_WAIT_DMA_DESC - waiting for DMA descriptors to be available
+ * HFI1_S_WAIT_KMEM - waiting for kernel memory to be available
+ * HFI1_S_WAIT_PSN - waiting for a packet to exit the send DMA queue
+ * HFI1_S_WAIT_ACK - waiting for an ACK packet before sending more requests
+ * HFI1_S_SEND_ONE - send one packet, request ACK, then wait for ACK
+ * HFI1_S_ECN - a BECN was queued to the send engine
+ */
+#define HFI1_S_SIGNAL_REQ_WR 0x0001
+#define HFI1_S_BUSY 0x0002
+#define HFI1_S_TIMER 0x0004
+#define HFI1_S_RESP_PENDING 0x0008
+#define HFI1_S_ACK_PENDING 0x0010
+#define HFI1_S_WAIT_FENCE 0x0020
+#define HFI1_S_WAIT_RDMAR 0x0040
+#define HFI1_S_WAIT_RNR 0x0080
+#define HFI1_S_WAIT_SSN_CREDIT 0x0100
+#define HFI1_S_WAIT_DMA 0x0200
+#define HFI1_S_WAIT_PIO 0x0400
+#define HFI1_S_WAIT_TX 0x0800
+#define HFI1_S_WAIT_DMA_DESC 0x1000
+#define HFI1_S_WAIT_KMEM 0x2000
+#define HFI1_S_WAIT_PSN 0x4000
+#define HFI1_S_WAIT_ACK 0x8000
+#define HFI1_S_SEND_ONE 0x10000
+#define HFI1_S_UNLIMITED_CREDIT 0x20000
+#define HFI1_S_AHG_VALID 0x40000
+#define HFI1_S_AHG_CLEAR 0x80000
+#define HFI1_S_ECN 0x100000
+
+/*
+ * Wait flags that would prevent any packet type from being sent.
+ */
+#define HFI1_S_ANY_WAIT_IO (HFI1_S_WAIT_PIO | HFI1_S_WAIT_TX | \
+ HFI1_S_WAIT_DMA_DESC | HFI1_S_WAIT_KMEM)
+
+/*
+ * Wait flags that would prevent send work requests from making progress.
+ */
+#define HFI1_S_ANY_WAIT_SEND (HFI1_S_WAIT_FENCE | HFI1_S_WAIT_RDMAR | \
+ HFI1_S_WAIT_RNR | HFI1_S_WAIT_SSN_CREDIT | HFI1_S_WAIT_DMA | \
+ HFI1_S_WAIT_PSN | HFI1_S_WAIT_ACK)
+
+#define HFI1_S_ANY_WAIT (HFI1_S_ANY_WAIT_IO | HFI1_S_ANY_WAIT_SEND)
+
+#define HFI1_PSN_CREDIT 16
+
+/*
+ * Since struct hfi1_swqe is not a fixed size, we can't simply index into
+ * struct hfi1_qp.s_wq. This function does the array index computation.
+ */
+static inline struct hfi1_swqe *get_swqe_ptr(struct hfi1_qp *qp,
+ unsigned n)
+{
+ return (struct hfi1_swqe *)((char *)qp->s_wq +
+ (sizeof(struct hfi1_swqe) +
+ qp->s_max_sge *
+ sizeof(struct hfi1_sge)) * n);
+}
+
+/*
+ * Since struct hfi1_rwqe is not a fixed size, we can't simply index into
+ * struct hfi1_rwq.wq. This function does the array index computation.
+ */
+static inline struct hfi1_rwqe *get_rwqe_ptr(struct hfi1_rq *rq, unsigned n)
+{
+ return (struct hfi1_rwqe *)
+ ((char *) rq->wq->wq +
+ (sizeof(struct hfi1_rwqe) +
+ rq->max_sge * sizeof(struct ib_sge)) * n);
+}
+
+#define MAX_LKEY_TABLE_BITS 23
+
+struct hfi1_lkey_table {
+ spinlock_t lock; /* protect changes in this struct */
+ u32 next; /* next unused index (speeds search) */
+ u32 gen; /* generation count */
+ u32 max; /* size of the table */
+ struct hfi1_mregion __rcu **table;
+};
+
+struct hfi1_opcode_stats {
+ u64 n_packets; /* number of packets */
+ u64 n_bytes; /* total number of bytes */
+};
+
+struct hfi1_opcode_stats_perctx {
+ struct hfi1_opcode_stats stats[256];
+};
+
+static inline void inc_opstats(
+ u32 tlen,
+ struct hfi1_opcode_stats *stats)
+{
+#ifdef CONFIG_DEBUG_FS
+ stats->n_bytes += tlen;
+ stats->n_packets++;
+#endif
+}
+
+struct hfi1_ibport {
+ struct hfi1_qp __rcu *qp[2];
+ struct ib_mad_agent *send_agent; /* agent for SMI (traps) */
+ struct hfi1_ah *sm_ah;
+ struct hfi1_ah *smi_ah;
+ struct rb_root mcast_tree;
+ spinlock_t lock; /* protect changes in this struct */
+
+ /* non-zero when timer is set */
+ unsigned long mkey_lease_timeout;
+ unsigned long trap_timeout;
+ __be64 gid_prefix; /* in network order */
+ __be64 mkey;
+ __be64 guids[HFI1_GUIDS_PER_PORT - 1]; /* writable GUIDs */
+ u64 tid; /* TID for traps */
+ u64 n_rc_resends;
+ u64 n_seq_naks;
+ u64 n_rdma_seq;
+ u64 n_rnr_naks;
+ u64 n_other_naks;
+ u64 n_loop_pkts;
+ u64 n_pkt_drops;
+ u64 n_vl15_dropped;
+ u64 n_rc_timeouts;
+ u64 n_dmawait;
+ u64 n_unaligned;
+ u64 n_rc_dupreq;
+ u64 n_rc_seqnak;
+
+ /* Hot-path per CPU counters to avoid cacheline trading to update */
+ u64 z_rc_acks;
+ u64 z_rc_qacks;
+ u64 z_rc_delayed_comp;
+ u64 __percpu *rc_acks;
+ u64 __percpu *rc_qacks;
+ u64 __percpu *rc_delayed_comp;
+
+ u32 port_cap_flags;
+ u32 pma_sample_start;
+ u32 pma_sample_interval;
+ __be16 pma_counter_select[5];
+ u16 pma_tag;
+ u16 pkey_violations;
+ u16 qkey_violations;
+ u16 mkey_violations;
+ u16 mkey_lease_period;
+ u16 sm_lid;
+ u16 repress_traps;
+ u8 sm_sl;
+ u8 mkeyprot;
+ u8 subnet_timeout;
+ u8 vl_high_limit;
+ /* the first 16 entries are sl_to_vl for !OPA */
+ u8 sl_to_sc[32];
+ u8 sc_to_sl[32];
+};
+
+
+struct hfi1_qp_ibdev;
+struct hfi1_ibdev {
+ struct ib_device ibdev;
+ struct list_head pending_mmaps;
+ spinlock_t mmap_offset_lock; /* protect mmap_offset */
+ u32 mmap_offset;
+ struct hfi1_mregion __rcu *dma_mr;
+
+ struct hfi1_qp_ibdev *qp_dev;
+
+ /* QP numbers are shared by all IB ports */
+ struct hfi1_lkey_table lk_table;
+ /* protect wait lists */
+ seqlock_t iowait_lock;
+ struct list_head txwait; /* list for wait verbs_txreq */
+ struct list_head memwait; /* list for wait kernel memory */
+ struct list_head txreq_free;
+ struct kmem_cache *verbs_txreq_cache;
+ struct timer_list mem_timer;
+
+ /* other waiters */
+ spinlock_t pending_lock;
+
+ u64 n_piowait;
+ u64 n_txwait;
+ u64 n_kmem_wait;
+
+ u32 n_pds_allocated; /* number of PDs allocated for device */
+ spinlock_t n_pds_lock;
+ u32 n_ahs_allocated; /* number of AHs allocated for device */
+ spinlock_t n_ahs_lock;
+ u32 n_cqs_allocated; /* number of CQs allocated for device */
+ spinlock_t n_cqs_lock;
+ u32 n_qps_allocated; /* number of QPs allocated for device */
+ spinlock_t n_qps_lock;
+ u32 n_srqs_allocated; /* number of SRQs allocated for device */
+ spinlock_t n_srqs_lock;
+ u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
+ spinlock_t n_mcast_grps_lock;
+#ifdef CONFIG_DEBUG_FS
+ /* per HFI debugfs */
+ struct dentry *hfi1_ibdev_dbg;
+ /* per HFI symlinks to above */
+ struct dentry *hfi1_ibdev_link;
+#endif
+};
+
+struct hfi1_verbs_counters {
+ u64 symbol_error_counter;
+ u64 link_error_recovery_counter;
+ u64 link_downed_counter;
+ u64 port_rcv_errors;
+ u64 port_rcv_remphys_errors;
+ u64 port_xmit_discards;
+ u64 port_xmit_data;
+ u64 port_rcv_data;
+ u64 port_xmit_packets;
+ u64 port_rcv_packets;
+ u32 local_link_integrity_errors;
+ u32 excessive_buffer_overrun_errors;
+ u32 vl15_dropped;
+};
+
+static inline struct hfi1_mr *to_imr(struct ib_mr *ibmr)
+{
+ return container_of(ibmr, struct hfi1_mr, ibmr);
+}
+
+static inline struct hfi1_pd *to_ipd(struct ib_pd *ibpd)
+{
+ return container_of(ibpd, struct hfi1_pd, ibpd);
+}
+
+static inline struct hfi1_ah *to_iah(struct ib_ah *ibah)
+{
+ return container_of(ibah, struct hfi1_ah, ibah);
+}
+
+static inline struct hfi1_cq *to_icq(struct ib_cq *ibcq)
+{
+ return container_of(ibcq, struct hfi1_cq, ibcq);
+}
+
+static inline struct hfi1_srq *to_isrq(struct ib_srq *ibsrq)
+{
+ return container_of(ibsrq, struct hfi1_srq, ibsrq);
+}
+
+static inline struct hfi1_qp *to_iqp(struct ib_qp *ibqp)
+{
+ return container_of(ibqp, struct hfi1_qp, ibqp);
+}
+
+static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
+{
+ return container_of(ibdev, struct hfi1_ibdev, ibdev);
+}
+
+/*
+ * Send if not busy or waiting for I/O and either
+ * a RC response is pending or we can process send work requests.
+ */
+static inline int hfi1_send_ok(struct hfi1_qp *qp)
+{
+ return !(qp->s_flags & (HFI1_S_BUSY | HFI1_S_ANY_WAIT_IO)) &&
+ (qp->s_hdrwords || (qp->s_flags & HFI1_S_RESP_PENDING) ||
+ !(qp->s_flags & HFI1_S_ANY_WAIT_SEND));
+}
+
+/*
+ * This must be called with s_lock held.
+ */
+void hfi1_schedule_send(struct hfi1_qp *qp);
+void hfi1_bad_pqkey(struct hfi1_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
+ u32 qp1, u32 qp2, __be16 lid1, __be16 lid2);
+void hfi1_cap_mask_chg(struct hfi1_ibport *ibp);
+void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
+void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
+int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
+ const struct ib_wc *in_wc, const struct ib_grh *in_grh,
+ const struct ib_mad_hdr *in_mad, size_t in_mad_size,
+ struct ib_mad_hdr *out_mad, size_t *out_mad_size,
+ u16 *out_mad_pkey_index);
+int hfi1_create_agents(struct hfi1_ibdev *dev);
+void hfi1_free_agents(struct hfi1_ibdev *dev);
+
+/*
+ * The PSN_MASK and PSN_SHIFT allow for
+ * 1) comparing two PSNs
+ * 2) returning the PSN with any upper bits masked
+ * 3) returning the difference between to PSNs
+ *
+ * The number of significant bits in the PSN must
+ * necessarily be at least one bit less than
+ * the container holding the PSN.
+ */
+#ifndef CONFIG_HFI1_VERBS_31BIT_PSN
+#define PSN_MASK 0xFFFFFF
+#define PSN_SHIFT 8
+#else
+#define PSN_MASK 0x7FFFFFFF
+#define PSN_SHIFT 1
+#endif
+#define PSN_MODIFY_MASK 0xFFFFFF
+
+/* Number of bits to pay attention to in the opcode for checking qp type */
+#define OPCODE_QP_MASK 0xE0
+
+/*
+ * Compare the lower 24 bits of the msn values.
+ * Returns an integer <, ==, or > than zero.
+ */
+static inline int cmp_msn(u32 a, u32 b)
+{
+ return (((int) a) - ((int) b)) << 8;
+}
+
+/*
+ * Compare two PSNs
+ * Returns an integer <, ==, or > than zero.
+ */
+static inline int cmp_psn(u32 a, u32 b)
+{
+ return (((int) a) - ((int) b)) << PSN_SHIFT;
+}
+
+/*
+ * Return masked PSN
+ */
+static inline u32 mask_psn(u32 a)
+{
+ return a & PSN_MASK;
+}
+
+/*
+ * Return delta between two PSNs
+ */
+static inline u32 delta_psn(u32 a, u32 b)
+{
+ return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
+}
+
+struct hfi1_mcast *hfi1_mcast_find(struct hfi1_ibport *ibp, union ib_gid *mgid);
+
+int hfi1_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
+
+int hfi1_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
+
+int hfi1_mcast_tree_empty(struct hfi1_ibport *ibp);
+
+struct verbs_txreq;
+void hfi1_put_txreq(struct verbs_txreq *tx);
+
+int hfi1_verbs_send(struct hfi1_qp *qp, struct ahg_ib_header *ahdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len);
+
+void hfi1_copy_sge(struct hfi1_sge_state *ss, void *data, u32 length,
+ int release);
+
+void hfi1_skip_sge(struct hfi1_sge_state *ss, u32 length, int release);
+
+void hfi1_cnp_rcv(struct hfi1_packet *packet);
+
+void hfi1_uc_rcv(struct hfi1_packet *packet);
+
+void hfi1_rc_rcv(struct hfi1_packet *packet);
+
+void hfi1_rc_hdrerr(
+ struct hfi1_ctxtdata *rcd,
+ struct hfi1_ib_header *hdr,
+ u32 rcv_flags,
+ struct hfi1_qp *qp);
+
+u8 ah_to_sc(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
+
+int hfi1_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
+
+struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u16 dlid);
+
+void hfi1_rc_rnr_retry(unsigned long arg);
+
+void hfi1_rc_send_complete(struct hfi1_qp *qp, struct hfi1_ib_header *hdr);
+
+void hfi1_rc_error(struct hfi1_qp *qp, enum ib_wc_status err);
+
+void hfi1_ud_rcv(struct hfi1_packet *packet);
+
+int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
+
+int hfi1_alloc_lkey(struct hfi1_mregion *mr, int dma_region);
+
+void hfi1_free_lkey(struct hfi1_mregion *mr);
+
+int hfi1_lkey_ok(struct hfi1_lkey_table *rkt, struct hfi1_pd *pd,
+ struct hfi1_sge *isge, struct ib_sge *sge, int acc);
+
+int hfi1_rkey_ok(struct hfi1_qp *qp, struct hfi1_sge *sge,
+ u32 len, u64 vaddr, u32 rkey, int acc);
+
+int hfi1_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr);
+
+struct ib_srq *hfi1_create_srq(struct ib_pd *ibpd,
+ struct ib_srq_init_attr *srq_init_attr,
+ struct ib_udata *udata);
+
+int hfi1_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
+ enum ib_srq_attr_mask attr_mask,
+ struct ib_udata *udata);
+
+int hfi1_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr);
+
+int hfi1_destroy_srq(struct ib_srq *ibsrq);
+
+int hfi1_cq_init(struct hfi1_devdata *dd);
+
+void hfi1_cq_exit(struct hfi1_devdata *dd);
+
+void hfi1_cq_enter(struct hfi1_cq *cq, struct ib_wc *entry, int sig);
+
+int hfi1_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
+
+struct ib_cq *hfi1_create_cq(
+ struct ib_device *ibdev,
+ const struct ib_cq_init_attr *attr,
+ struct ib_ucontext *context,
+ struct ib_udata *udata);
+
+int hfi1_destroy_cq(struct ib_cq *ibcq);
+
+int hfi1_req_notify_cq(
+ struct ib_cq *ibcq,
+ enum ib_cq_notify_flags notify_flags);
+
+int hfi1_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
+
+struct ib_mr *hfi1_get_dma_mr(struct ib_pd *pd, int acc);
+
+struct ib_mr *hfi1_reg_phys_mr(struct ib_pd *pd,
+ struct ib_phys_buf *buffer_list,
+ int num_phys_buf, int acc, u64 *iova_start);
+
+struct ib_mr *hfi1_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+ u64 virt_addr, int mr_access_flags,
+ struct ib_udata *udata);
+
+int hfi1_dereg_mr(struct ib_mr *ibmr);
+
+struct ib_mr *hfi1_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len);
+
+struct ib_fast_reg_page_list *hfi1_alloc_fast_reg_page_list(
+ struct ib_device *ibdev, int page_list_len);
+
+void hfi1_free_fast_reg_page_list(struct ib_fast_reg_page_list *pl);
+
+int hfi1_fast_reg_mr(struct hfi1_qp *qp, struct ib_send_wr *wr);
+
+struct ib_fmr *hfi1_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
+ struct ib_fmr_attr *fmr_attr);
+
+int hfi1_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
+ int list_len, u64 iova);
+
+int hfi1_unmap_fmr(struct list_head *fmr_list);
+
+int hfi1_dealloc_fmr(struct ib_fmr *ibfmr);
+
+static inline void hfi1_get_mr(struct hfi1_mregion *mr)
+{
+ atomic_inc(&mr->refcount);
+}
+
+static inline void hfi1_put_mr(struct hfi1_mregion *mr)
+{
+ if (unlikely(atomic_dec_and_test(&mr->refcount)))
+ complete(&mr->comp);
+}
+
+static inline void hfi1_put_ss(struct hfi1_sge_state *ss)
+{
+ while (ss->num_sge) {
+ hfi1_put_mr(ss->sge.mr);
+ if (--ss->num_sge)
+ ss->sge = *ss->sg_list++;
+ }
+}
+
+void hfi1_release_mmap_info(struct kref *ref);
+
+struct hfi1_mmap_info *hfi1_create_mmap_info(struct hfi1_ibdev *dev, u32 size,
+ struct ib_ucontext *context,
+ void *obj);
+
+void hfi1_update_mmap_info(struct hfi1_ibdev *dev, struct hfi1_mmap_info *ip,
+ u32 size, void *obj);
+
+int hfi1_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
+
+int hfi1_get_rwqe(struct hfi1_qp *qp, int wr_id_only);
+
+void hfi1_migrate_qp(struct hfi1_qp *qp);
+
+int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_ib_header *hdr,
+ int has_grh, struct hfi1_qp *qp, u32 bth0);
+
+u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
+ struct ib_global_route *grh, u32 hwords, u32 nwords);
+
+void clear_ahg(struct hfi1_qp *qp);
+
+void hfi1_make_ruc_header(struct hfi1_qp *qp, struct hfi1_other_headers *ohdr,
+ u32 bth0, u32 bth2, int middle);
+
+void hfi1_do_send(struct work_struct *work);
+
+void hfi1_send_complete(struct hfi1_qp *qp, struct hfi1_swqe *wqe,
+ enum ib_wc_status status);
+
+void hfi1_send_rc_ack(struct hfi1_ctxtdata *, struct hfi1_qp *qp, int is_fecn);
+
+int hfi1_make_rc_req(struct hfi1_qp *qp);
+
+int hfi1_make_uc_req(struct hfi1_qp *qp);
+
+int hfi1_make_ud_req(struct hfi1_qp *qp);
+
+int hfi1_register_ib_device(struct hfi1_devdata *);
+
+void hfi1_unregister_ib_device(struct hfi1_devdata *);
+
+void hfi1_ib_rcv(struct hfi1_packet *packet);
+
+unsigned hfi1_get_npkeys(struct hfi1_devdata *);
+
+int hfi1_verbs_send_dma(struct hfi1_qp *qp, struct ahg_ib_header *hdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc);
+
+int hfi1_verbs_send_pio(struct hfi1_qp *qp, struct ahg_ib_header *hdr,
+ u32 hdrwords, struct hfi1_sge_state *ss, u32 len,
+ u32 plen, u32 dwords, u64 pbc);
+
+struct send_context *qp_to_send_context(struct hfi1_qp *qp, u8 sc5);
+
+extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
+
+extern const u8 hdr_len_by_opcode[];
+
+extern const int ib_hfi1_state_ops[];
+
+extern __be64 ib_hfi1_sys_image_guid; /* in network order */
+
+extern unsigned int hfi1_lkey_table_size;
+
+extern unsigned int hfi1_max_cqes;
+
+extern unsigned int hfi1_max_cqs;
+
+extern unsigned int hfi1_max_qp_wrs;
+
+extern unsigned int hfi1_max_qps;
+
+extern unsigned int hfi1_max_sges;
+
+extern unsigned int hfi1_max_mcast_grps;
+
+extern unsigned int hfi1_max_mcast_qp_attached;
+
+extern unsigned int hfi1_max_srqs;
+
+extern unsigned int hfi1_max_srq_sges;
+
+extern unsigned int hfi1_max_srq_wrs;
+
+extern const u32 ib_hfi1_rnr_table[];
+
+extern struct ib_dma_mapping_ops hfi1_dma_mapping_ops;
+
+#endif /* HFI1_VERBS_H */
diff --git a/drivers/staging/rdma/hfi1/verbs_mcast.c b/drivers/staging/rdma/hfi1/verbs_mcast.c
new file mode 100644
index 0000000..afc6b4c
--- /dev/null
+++ b/drivers/staging/rdma/hfi1/verbs_mcast.c
@@ -0,0 +1,385 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/rculist.h>
+
+#include "hfi.h"
+
+/**
+ * mcast_qp_alloc - alloc a struct to link a QP to mcast GID struct
+ * @qp: the QP to link
+ */
+static struct hfi1_mcast_qp *mcast_qp_alloc(struct hfi1_qp *qp)
+{
+ struct hfi1_mcast_qp *mqp;
+
+ mqp = kmalloc(sizeof(*mqp), GFP_KERNEL);
+ if (!mqp)
+ goto bail;
+
+ mqp->qp = qp;
+ atomic_inc(&qp->refcount);
+
+bail:
+ return mqp;
+}
+
+static void mcast_qp_free(struct hfi1_mcast_qp *mqp)
+{
+ struct hfi1_qp *qp = mqp->qp;
+
+ /* Notify hfi1_destroy_qp() if it is waiting. */
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+
+ kfree(mqp);
+}
+
+/**
+ * mcast_alloc - allocate the multicast GID structure
+ * @mgid: the multicast GID
+ *
+ * A list of QPs will be attached to this structure.
+ */
+static struct hfi1_mcast *mcast_alloc(union ib_gid *mgid)
+{
+ struct hfi1_mcast *mcast;
+
+ mcast = kmalloc(sizeof(*mcast), GFP_KERNEL);
+ if (!mcast)
+ goto bail;
+
+ mcast->mgid = *mgid;
+ INIT_LIST_HEAD(&mcast->qp_list);
+ init_waitqueue_head(&mcast->wait);
+ atomic_set(&mcast->refcount, 0);
+ mcast->n_attached = 0;
+
+bail:
+ return mcast;
+}
+
+static void mcast_free(struct hfi1_mcast *mcast)
+{
+ struct hfi1_mcast_qp *p, *tmp;
+
+ list_for_each_entry_safe(p, tmp, &mcast->qp_list, list)
+ mcast_qp_free(p);
+
+ kfree(mcast);
+}
+
+/**
+ * hfi1_mcast_find - search the global table for the given multicast GID
+ * @ibp: the IB port structure
+ * @mgid: the multicast GID to search for
+ *
+ * Returns NULL if not found.
+ *
+ * The caller is responsible for decrementing the reference count if found.
+ */
+struct hfi1_mcast *hfi1_mcast_find(struct hfi1_ibport *ibp, union ib_gid *mgid)
+{
+ struct rb_node *n;
+ unsigned long flags;
+ struct hfi1_mcast *mcast;
+
+ spin_lock_irqsave(&ibp->lock, flags);
+ n = ibp->mcast_tree.rb_node;
+ while (n) {
+ int ret;
+
+ mcast = rb_entry(n, struct hfi1_mcast, rb_node);
+
+ ret = memcmp(mgid->raw, mcast->mgid.raw,
+ sizeof(union ib_gid));
+ if (ret < 0)
+ n = n->rb_left;
+ else if (ret > 0)
+ n = n->rb_right;
+ else {
+ atomic_inc(&mcast->refcount);
+ spin_unlock_irqrestore(&ibp->lock, flags);
+ goto bail;
+ }
+ }
+ spin_unlock_irqrestore(&ibp->lock, flags);
+
+ mcast = NULL;
+
+bail:
+ return mcast;
+}
+
+/**
+ * mcast_add - insert mcast GID into table and attach QP struct
+ * @mcast: the mcast GID table
+ * @mqp: the QP to attach
+ *
+ * Return zero if both were added. Return EEXIST if the GID was already in
+ * the table but the QP was added. Return ESRCH if the QP was already
+ * attached and neither structure was added.
+ */
+static int mcast_add(struct hfi1_ibdev *dev, struct hfi1_ibport *ibp,
+ struct hfi1_mcast *mcast, struct hfi1_mcast_qp *mqp)
+{
+ struct rb_node **n = &ibp->mcast_tree.rb_node;
+ struct rb_node *pn = NULL;
+ int ret;
+
+ spin_lock_irq(&ibp->lock);
+
+ while (*n) {
+ struct hfi1_mcast *tmcast;
+ struct hfi1_mcast_qp *p;
+
+ pn = *n;
+ tmcast = rb_entry(pn, struct hfi1_mcast, rb_node);
+
+ ret = memcmp(mcast->mgid.raw, tmcast->mgid.raw,
+ sizeof(union ib_gid));
+ if (ret < 0) {
+ n = &pn->rb_left;
+ continue;
+ }
+ if (ret > 0) {
+ n = &pn->rb_right;
+ continue;
+ }
+
+ /* Search the QP list to see if this is already there. */
+ list_for_each_entry_rcu(p, &tmcast->qp_list, list) {
+ if (p->qp == mqp->qp) {
+ ret = ESRCH;
+ goto bail;
+ }
+ }
+ if (tmcast->n_attached == hfi1_max_mcast_qp_attached) {
+ ret = ENOMEM;
+ goto bail;
+ }
+
+ tmcast->n_attached++;
+
+ list_add_tail_rcu(&mqp->list, &tmcast->qp_list);
+ ret = EEXIST;
+ goto bail;
+ }
+
+ spin_lock(&dev->n_mcast_grps_lock);
+ if (dev->n_mcast_grps_allocated == hfi1_max_mcast_grps) {
+ spin_unlock(&dev->n_mcast_grps_lock);
+ ret = ENOMEM;
+ goto bail;
+ }
+
+ dev->n_mcast_grps_allocated++;
+ spin_unlock(&dev->n_mcast_grps_lock);
+
+ mcast->n_attached++;
+
+ list_add_tail_rcu(&mqp->list, &mcast->qp_list);
+
+ atomic_inc(&mcast->refcount);
+ rb_link_node(&mcast->rb_node, pn, n);
+ rb_insert_color(&mcast->rb_node, &ibp->mcast_tree);
+
+ ret = 0;
+
+bail:
+ spin_unlock_irq(&ibp->lock);
+
+ return ret;
+}
+
+int hfi1_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+ struct hfi1_qp *qp = to_iqp(ibqp);
+ struct hfi1_ibdev *dev = to_idev(ibqp->device);
+ struct hfi1_ibport *ibp;
+ struct hfi1_mcast *mcast;
+ struct hfi1_mcast_qp *mqp;
+ int ret;
+
+ if (ibqp->qp_num <= 1 || qp->state == IB_QPS_RESET) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ /*
+ * Allocate data structures since its better to do this outside of
+ * spin locks and it will most likely be needed.
+ */
+ mcast = mcast_alloc(gid);
+ if (mcast == NULL) {
+ ret = -ENOMEM;
+ goto bail;
+ }
+ mqp = mcast_qp_alloc(qp);
+ if (mqp == NULL) {
+ mcast_free(mcast);
+ ret = -ENOMEM;
+ goto bail;
+ }
+ ibp = to_iport(ibqp->device, qp->port_num);
+ switch (mcast_add(dev, ibp, mcast, mqp)) {
+ case ESRCH:
+ /* Neither was used: OK to attach the same QP twice. */
+ mcast_qp_free(mqp);
+ mcast_free(mcast);
+ break;
+
+ case EEXIST: /* The mcast wasn't used */
+ mcast_free(mcast);
+ break;
+
+ case ENOMEM:
+ /* Exceeded the maximum number of mcast groups. */
+ mcast_qp_free(mqp);
+ mcast_free(mcast);
+ ret = -ENOMEM;
+ goto bail;
+
+ default:
+ break;
+ }
+
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+int hfi1_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+ struct hfi1_qp *qp = to_iqp(ibqp);
+ struct hfi1_ibdev *dev = to_idev(ibqp->device);
+ struct hfi1_ibport *ibp = to_iport(ibqp->device, qp->port_num);
+ struct hfi1_mcast *mcast = NULL;
+ struct hfi1_mcast_qp *p, *tmp;
+ struct rb_node *n;
+ int last = 0;
+ int ret;
+
+ if (ibqp->qp_num <= 1 || qp->state == IB_QPS_RESET) {
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ spin_lock_irq(&ibp->lock);
+
+ /* Find the GID in the mcast table. */
+ n = ibp->mcast_tree.rb_node;
+ while (1) {
+ if (n == NULL) {
+ spin_unlock_irq(&ibp->lock);
+ ret = -EINVAL;
+ goto bail;
+ }
+
+ mcast = rb_entry(n, struct hfi1_mcast, rb_node);
+ ret = memcmp(gid->raw, mcast->mgid.raw,
+ sizeof(union ib_gid));
+ if (ret < 0)
+ n = n->rb_left;
+ else if (ret > 0)
+ n = n->rb_right;
+ else
+ break;
+ }
+
+ /* Search the QP list. */
+ list_for_each_entry_safe(p, tmp, &mcast->qp_list, list) {
+ if (p->qp != qp)
+ continue;
+ /*
+ * We found it, so remove it, but don't poison the forward
+ * link until we are sure there are no list walkers.
+ */
+ list_del_rcu(&p->list);
+ mcast->n_attached--;
+
+ /* If this was the last attached QP, remove the GID too. */
+ if (list_empty(&mcast->qp_list)) {
+ rb_erase(&mcast->rb_node, &ibp->mcast_tree);
+ last = 1;
+ }
+ break;
+ }
+
+ spin_unlock_irq(&ibp->lock);
+
+ if (p) {
+ /*
+ * Wait for any list walkers to finish before freeing the
+ * list element.
+ */
+ wait_event(mcast->wait, atomic_read(&mcast->refcount) <= 1);
+ mcast_qp_free(p);
+ }
+ if (last) {
+ atomic_dec(&mcast->refcount);
+ wait_event(mcast->wait, !atomic_read(&mcast->refcount));
+ mcast_free(mcast);
+ spin_lock_irq(&dev->n_mcast_grps_lock);
+ dev->n_mcast_grps_allocated--;
+ spin_unlock_irq(&dev->n_mcast_grps_lock);
+ }
+
+ ret = 0;
+
+bail:
+ return ret;
+}
+
+int hfi1_mcast_tree_empty(struct hfi1_ibport *ibp)
+{
+ return ibp->mcast_tree.rb_node == NULL;
+}