Add support of Cavium Liquidio ethernet adapters
Following patch V8 adds support for Cavium Liquidio pci express
based 10Gig ethernet adapters.
1) Consolidated all debug macros to either call dev_* or
netdev_* macros directly, feedback from previous patch.
2) Changed soft commands to avoid crash when running
in interrupt context.
3) Fixed link status not reflecting correct status when NetworkManager
is running. Added MODULE_FIRMWARE declarations.
Following were the previous patches.
Patch V7:
1) Minor comments from v6 release regarding debug statements.
2) Fix for large multicast lists.
3) Fixed lockup issue if port initialization fails.
4) Enabled MSI by default.
https://patchwork.ozlabs.org/patch/464441/
Patch V6:
1) Addressed the uint64 vs u64 issue, feedback from previous patch.
2) Consolidated some receive processing routines.
3) Removed link status polling method.
https://patchwork.ozlabs.org/patch/459514/
Patch V5:
Based on the feedback from earlier patches with regards to
consolidation of common functions like device init, register
programming for cn66xx and cn68xx devices.
https://patchwork.ozlabs.org/patch/438979/
Patch V4:
Following were the changes based on the feedback from earlier patch:
1) Added mmiowb while synchronizing queue updates and other hw
interactions.
2) Statistics will now be incremented non-atomically per each ring.
liquidio_get_stats will add stats of each ring while reporting the
total statistics counts.
3) Modified liquidio_ioctl to return proper return codes.
4) Modified device naming to use standard Ethernet naming.
5) Global function names in the driver will have lio_/liquidio_/octeon_
prefix.
6) Ethtool related changes for:
Removed redundant stats and jiffies.
Use default ethtool handler of link status.
Speed setting will make use of ethtool_cmd_speed_set.
7) Added checks for pci_map_* return codes.
8) Check for signals while waiting in interruptible mode
https://patchwork.ozlabs.org/patch/435073/
Patch v3:
Implemented feedback from previous patch like:
Removed NAPI Config and DEBUG config options, added BQL and xmit_more
support.
https://patchwork.ozlabs.org/patch/422749/
Patch V2:
Implemented feedback from previous patch.
https://patchwork.ozlabs.org/patch/413539/
First Patch:
https://patchwork.ozlabs.org/patch/412946/
Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Robert Richter <Robert.Richter@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <Aleksey.Makarov@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_nic.h b/drivers/net/ethernet/cavium/liquidio/octeon_nic.h
new file mode 100644
index 0000000..0238857
--- /dev/null
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_nic.h
@@ -0,0 +1,227 @@
+/**********************************************************************
+ * Author: Cavium, Inc.
+ *
+ * Contact: support@cavium.com
+ * Please include "LiquidIO" in the subject.
+ *
+ * Copyright (c) 2003-2015 Cavium, Inc.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, Version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
+ * NONINFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * This file may also be available under a different license from Cavium.
+ * Contact Cavium, Inc. for more information
+ **********************************************************************/
+
+/*! \file octeon_nic.h
+ * \brief Host NIC Driver: Routine to send network data &
+ * control packet to Octeon.
+ */
+
+#ifndef __OCTEON_NIC_H__
+#define __OCTEON_NIC_H__
+
+/* Maximum number of 8-byte words can be sent in a NIC control message.
+ */
+#define MAX_NCTRL_UDD 32
+
+typedef void (*octnic_ctrl_pkt_cb_fn_t) (void *);
+
+/* Structure of control information passed by the NIC module to the OSI
+ * layer when sending control commands to Octeon device software.
+ */
+struct octnic_ctrl_pkt {
+ /** Command to be passed to the Octeon device software. */
+ union octnet_cmd ncmd;
+
+ /** Send buffer */
+ void *data;
+ u64 dmadata;
+
+ /** Response buffer */
+ void *rdata;
+ u64 dmardata;
+
+ /** Additional data that may be needed by some commands. */
+ u64 udd[MAX_NCTRL_UDD];
+
+ /** Time to wait for Octeon software to respond to this control command.
+ * If wait_time is 0, OSI assumes no response is expected.
+ */
+ size_t wait_time;
+
+ /** The network device that issued the control command. */
+ u64 netpndev;
+
+ /** Callback function called when the command has been fetched */
+ octnic_ctrl_pkt_cb_fn_t cb_fn;
+};
+
+#define MAX_UDD_SIZE(nctrl) (sizeof(nctrl->udd))
+
+/** Structure of data information passed by the NIC module to the OSI
+ * layer when forwarding data to Octeon device software.
+ */
+struct octnic_data_pkt {
+ /** Pointer to information maintained by NIC module for this packet. The
+ * OSI layer passes this as-is to the driver.
+ */
+ void *buf;
+
+ /** Type of buffer passed in "buf" above. */
+ u32 reqtype;
+
+ /** Total data bytes to be transferred in this command. */
+ u32 datasize;
+
+ /** Command to be passed to the Octeon device software. */
+ struct octeon_instr_64B cmd;
+
+ /** Input queue to use to send this command. */
+ u32 q_no;
+
+};
+
+/** Structure passed by NIC module to OSI layer to prepare a command to send
+ * network data to Octeon.
+ */
+union octnic_cmd_setup {
+ struct {
+ u32 ifidx:8;
+ u32 cksum_offset:7;
+ u32 gather:1;
+ u32 timestamp:1;
+ u32 ipv4opts_ipv6exthdr:2;
+ u32 ip_csum:1;
+ u32 tnl_csum:1;
+
+ u32 rsvd:11;
+ union {
+ u32 datasize;
+ u32 gatherptrs;
+ } u;
+ } s;
+
+ u64 u64;
+
+};
+
+struct octnic_ctrl_params {
+ u32 resp_order;
+};
+
+static inline int octnet_iq_is_full(struct octeon_device *oct, u32 q_no)
+{
+ return ((u32)atomic_read(&oct->instr_queue[q_no]->instr_pending)
+ >= (oct->instr_queue[q_no]->max_count - 2));
+}
+
+/** Utility function to prepare a 64B NIC instruction based on a setup command
+ * @param cmd - pointer to instruction to be filled in.
+ * @param setup - pointer to the setup structure
+ * @param q_no - which queue for back pressure
+ *
+ * Assumes the cmd instruction is pre-allocated, but no fields are filled in.
+ */
+static inline void
+octnet_prepare_pci_cmd(struct octeon_instr_64B *cmd,
+ union octnic_cmd_setup *setup, u32 tag)
+{
+ struct octeon_instr_ih *ih;
+ struct octeon_instr_irh *irh;
+ union octnic_packet_params packet_params;
+
+ memset(cmd, 0, sizeof(struct octeon_instr_64B));
+
+ ih = (struct octeon_instr_ih *)&cmd->ih;
+
+ /* assume that rflag is cleared so therefore front data will only have
+ * irh and ossp[1] and ossp[2] for a total of 24 bytes
+ */
+ ih->fsz = 24;
+
+ ih->tagtype = ORDERED_TAG;
+ ih->grp = DEFAULT_POW_GRP;
+
+ if (tag)
+ ih->tag = tag;
+ else
+ ih->tag = LIO_DATA(setup->s.ifidx);
+
+ ih->raw = 1;
+ ih->qos = (setup->s.ifidx & 3) + 4; /* map qos based on interface */
+
+ if (!setup->s.gather) {
+ ih->dlengsz = setup->s.u.datasize;
+ } else {
+ ih->gather = 1;
+ ih->dlengsz = setup->s.u.gatherptrs;
+ }
+
+ irh = (struct octeon_instr_irh *)&cmd->irh;
+
+ irh->opcode = OPCODE_NIC;
+ irh->subcode = OPCODE_NIC_NW_DATA;
+
+ packet_params.u32 = 0;
+
+ if (setup->s.cksum_offset) {
+ packet_params.s.csoffset = setup->s.cksum_offset;
+ packet_params.s.ipv4opts_ipv6exthdr =
+ setup->s.ipv4opts_ipv6exthdr;
+ }
+
+ packet_params.s.ip_csum = setup->s.ip_csum;
+ packet_params.s.tnl_csum = setup->s.tnl_csum;
+ packet_params.s.ifidx = setup->s.ifidx;
+ packet_params.s.tsflag = setup->s.timestamp;
+
+ irh->ossp = packet_params.u32;
+}
+
+/** Allocate and a soft command with space for a response immediately following
+ * the commnad.
+ * @param oct - octeon device pointer
+ * @param cmd - pointer to the command structure, pre-filled for everything
+ * except the response.
+ * @param rdatasize - size in bytes of the response.
+ *
+ * @returns pointer to allocated buffer with command copied into it, and
+ * response space immediately following.
+ */
+void *
+octeon_alloc_soft_command_resp(struct octeon_device *oct,
+ struct octeon_instr_64B *cmd,
+ size_t rdatasize);
+
+/** Send a NIC data packet to the device
+ * @param oct - octeon device pointer
+ * @param ndata - control structure with queueing, and buffer information
+ *
+ * @returns IQ_FAILED if it failed to add to the input queue. IQ_STOP if it the
+ * queue should be stopped, and IQ_SEND_OK if it sent okay.
+ */
+int octnet_send_nic_data_pkt(struct octeon_device *oct,
+ struct octnic_data_pkt *ndata, u32 xmit_more);
+
+/** Send a NIC control packet to the device
+ * @param oct - octeon device pointer
+ * @param nctrl - control structure with command, timout, and callback info
+ * @param nparams - response control structure
+ *
+ * @returns IQ_FAILED if it failed to add to the input queue. IQ_STOP if it the
+ * queue should be stopped, and IQ_SEND_OK if it sent okay.
+ */
+int
+octnet_send_nic_ctrl_pkt(struct octeon_device *oct,
+ struct octnic_ctrl_pkt *nctrl,
+ struct octnic_ctrl_params nparams);
+
+#endif