Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/infiniband/hw/mthca/mthca_eq.c b/drivers/infiniband/hw/mthca/mthca_eq.c
new file mode 100644
index 0000000..623daab
--- /dev/null
+++ b/drivers/infiniband/hw/mthca/mthca_eq.c
@@ -0,0 +1,964 @@
+/*
+ * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * $Id: mthca_eq.c 1382 2004-12-24 02:21:02Z roland $
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+
+#include "mthca_dev.h"
+#include "mthca_cmd.h"
+#include "mthca_config_reg.h"
+
+enum {
+ MTHCA_NUM_ASYNC_EQE = 0x80,
+ MTHCA_NUM_CMD_EQE = 0x80,
+ MTHCA_EQ_ENTRY_SIZE = 0x20
+};
+
+/*
+ * Must be packed because start is 64 bits but only aligned to 32 bits.
+ */
+struct mthca_eq_context {
+ u32 flags;
+ u64 start;
+ u32 logsize_usrpage;
+ u32 tavor_pd; /* reserved for Arbel */
+ u8 reserved1[3];
+ u8 intr;
+ u32 arbel_pd; /* lost_count for Tavor */
+ u32 lkey;
+ u32 reserved2[2];
+ u32 consumer_index;
+ u32 producer_index;
+ u32 reserved3[4];
+} __attribute__((packed));
+
+#define MTHCA_EQ_STATUS_OK ( 0 << 28)
+#define MTHCA_EQ_STATUS_OVERFLOW ( 9 << 28)
+#define MTHCA_EQ_STATUS_WRITE_FAIL (10 << 28)
+#define MTHCA_EQ_OWNER_SW ( 0 << 24)
+#define MTHCA_EQ_OWNER_HW ( 1 << 24)
+#define MTHCA_EQ_FLAG_TR ( 1 << 18)
+#define MTHCA_EQ_FLAG_OI ( 1 << 17)
+#define MTHCA_EQ_STATE_ARMED ( 1 << 8)
+#define MTHCA_EQ_STATE_FIRED ( 2 << 8)
+#define MTHCA_EQ_STATE_ALWAYS_ARMED ( 3 << 8)
+#define MTHCA_EQ_STATE_ARBEL ( 8 << 8)
+
+enum {
+ MTHCA_EVENT_TYPE_COMP = 0x00,
+ MTHCA_EVENT_TYPE_PATH_MIG = 0x01,
+ MTHCA_EVENT_TYPE_COMM_EST = 0x02,
+ MTHCA_EVENT_TYPE_SQ_DRAINED = 0x03,
+ MTHCA_EVENT_TYPE_SRQ_LAST_WQE = 0x13,
+ MTHCA_EVENT_TYPE_CQ_ERROR = 0x04,
+ MTHCA_EVENT_TYPE_WQ_CATAS_ERROR = 0x05,
+ MTHCA_EVENT_TYPE_EEC_CATAS_ERROR = 0x06,
+ MTHCA_EVENT_TYPE_PATH_MIG_FAILED = 0x07,
+ MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR = 0x10,
+ MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR = 0x11,
+ MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR = 0x12,
+ MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR = 0x08,
+ MTHCA_EVENT_TYPE_PORT_CHANGE = 0x09,
+ MTHCA_EVENT_TYPE_EQ_OVERFLOW = 0x0f,
+ MTHCA_EVENT_TYPE_ECC_DETECT = 0x0e,
+ MTHCA_EVENT_TYPE_CMD = 0x0a
+};
+
+#define MTHCA_ASYNC_EVENT_MASK ((1ULL << MTHCA_EVENT_TYPE_PATH_MIG) | \
+ (1ULL << MTHCA_EVENT_TYPE_COMM_EST) | \
+ (1ULL << MTHCA_EVENT_TYPE_SQ_DRAINED) | \
+ (1ULL << MTHCA_EVENT_TYPE_CQ_ERROR) | \
+ (1ULL << MTHCA_EVENT_TYPE_WQ_CATAS_ERROR) | \
+ (1ULL << MTHCA_EVENT_TYPE_EEC_CATAS_ERROR) | \
+ (1ULL << MTHCA_EVENT_TYPE_PATH_MIG_FAILED) | \
+ (1ULL << MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
+ (1ULL << MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR) | \
+ (1ULL << MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR) | \
+ (1ULL << MTHCA_EVENT_TYPE_PORT_CHANGE) | \
+ (1ULL << MTHCA_EVENT_TYPE_ECC_DETECT))
+#define MTHCA_SRQ_EVENT_MASK (1ULL << MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR) | \
+ (1ULL << MTHCA_EVENT_TYPE_SRQ_LAST_WQE)
+#define MTHCA_CMD_EVENT_MASK (1ULL << MTHCA_EVENT_TYPE_CMD)
+
+#define MTHCA_EQ_DB_INC_CI (1 << 24)
+#define MTHCA_EQ_DB_REQ_NOT (2 << 24)
+#define MTHCA_EQ_DB_DISARM_CQ (3 << 24)
+#define MTHCA_EQ_DB_SET_CI (4 << 24)
+#define MTHCA_EQ_DB_ALWAYS_ARM (5 << 24)
+
+struct mthca_eqe {
+ u8 reserved1;
+ u8 type;
+ u8 reserved2;
+ u8 subtype;
+ union {
+ u32 raw[6];
+ struct {
+ u32 cqn;
+ } __attribute__((packed)) comp;
+ struct {
+ u16 reserved1;
+ u16 token;
+ u32 reserved2;
+ u8 reserved3[3];
+ u8 status;
+ u64 out_param;
+ } __attribute__((packed)) cmd;
+ struct {
+ u32 qpn;
+ } __attribute__((packed)) qp;
+ struct {
+ u32 cqn;
+ u32 reserved1;
+ u8 reserved2[3];
+ u8 syndrome;
+ } __attribute__((packed)) cq_err;
+ struct {
+ u32 reserved1[2];
+ u32 port;
+ } __attribute__((packed)) port_change;
+ } event;
+ u8 reserved3[3];
+ u8 owner;
+} __attribute__((packed));
+
+#define MTHCA_EQ_ENTRY_OWNER_SW (0 << 7)
+#define MTHCA_EQ_ENTRY_OWNER_HW (1 << 7)
+
+static inline u64 async_mask(struct mthca_dev *dev)
+{
+ return dev->mthca_flags & MTHCA_FLAG_SRQ ?
+ MTHCA_ASYNC_EVENT_MASK | MTHCA_SRQ_EVENT_MASK :
+ MTHCA_ASYNC_EVENT_MASK;
+}
+
+static inline void tavor_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
+{
+ u32 doorbell[2];
+
+ doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_SET_CI | eq->eqn);
+ doorbell[1] = cpu_to_be32(ci & (eq->nent - 1));
+
+ /*
+ * This barrier makes sure that all updates to ownership bits
+ * done by set_eqe_hw() hit memory before the consumer index
+ * is updated. set_eq_ci() allows the HCA to possibly write
+ * more EQ entries, and we want to avoid the exceedingly
+ * unlikely possibility of the HCA writing an entry and then
+ * having set_eqe_hw() overwrite the owner field.
+ */
+ wmb();
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_EQ_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+}
+
+static inline void arbel_set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
+{
+ /* See comment in tavor_set_eq_ci() above. */
+ wmb();
+ __raw_writel(cpu_to_be32(ci), dev->eq_regs.arbel.eq_set_ci_base +
+ eq->eqn * 8);
+ /* We still want ordering, just not swabbing, so add a barrier */
+ mb();
+}
+
+static inline void set_eq_ci(struct mthca_dev *dev, struct mthca_eq *eq, u32 ci)
+{
+ if (dev->hca_type == ARBEL_NATIVE)
+ arbel_set_eq_ci(dev, eq, ci);
+ else
+ tavor_set_eq_ci(dev, eq, ci);
+}
+
+static inline void tavor_eq_req_not(struct mthca_dev *dev, int eqn)
+{
+ u32 doorbell[2];
+
+ doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_REQ_NOT | eqn);
+ doorbell[1] = 0;
+
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_EQ_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+}
+
+static inline void arbel_eq_req_not(struct mthca_dev *dev, u32 eqn_mask)
+{
+ writel(eqn_mask, dev->eq_regs.arbel.eq_arm);
+}
+
+static inline void disarm_cq(struct mthca_dev *dev, int eqn, int cqn)
+{
+ if (dev->hca_type != ARBEL_NATIVE) {
+ u32 doorbell[2];
+
+ doorbell[0] = cpu_to_be32(MTHCA_EQ_DB_DISARM_CQ | eqn);
+ doorbell[1] = cpu_to_be32(cqn);
+
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_EQ_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+ }
+}
+
+static inline struct mthca_eqe *get_eqe(struct mthca_eq *eq, u32 entry)
+{
+ unsigned long off = (entry & (eq->nent - 1)) * MTHCA_EQ_ENTRY_SIZE;
+ return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE;
+}
+
+static inline struct mthca_eqe* next_eqe_sw(struct mthca_eq *eq)
+{
+ struct mthca_eqe* eqe;
+ eqe = get_eqe(eq, eq->cons_index);
+ return (MTHCA_EQ_ENTRY_OWNER_HW & eqe->owner) ? NULL : eqe;
+}
+
+static inline void set_eqe_hw(struct mthca_eqe *eqe)
+{
+ eqe->owner = MTHCA_EQ_ENTRY_OWNER_HW;
+}
+
+static void port_change(struct mthca_dev *dev, int port, int active)
+{
+ struct ib_event record;
+
+ mthca_dbg(dev, "Port change to %s for port %d\n",
+ active ? "active" : "down", port);
+
+ record.device = &dev->ib_dev;
+ record.event = active ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
+ record.element.port_num = port;
+
+ ib_dispatch_event(&record);
+}
+
+static int mthca_eq_int(struct mthca_dev *dev, struct mthca_eq *eq)
+{
+ struct mthca_eqe *eqe;
+ int disarm_cqn;
+ int eqes_found = 0;
+
+ while ((eqe = next_eqe_sw(eq))) {
+ int set_ci = 0;
+
+ /*
+ * Make sure we read EQ entry contents after we've
+ * checked the ownership bit.
+ */
+ rmb();
+
+ switch (eqe->type) {
+ case MTHCA_EVENT_TYPE_COMP:
+ disarm_cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
+ disarm_cq(dev, eq->eqn, disarm_cqn);
+ mthca_cq_event(dev, disarm_cqn);
+ break;
+
+ case MTHCA_EVENT_TYPE_PATH_MIG:
+ mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
+ IB_EVENT_PATH_MIG);
+ break;
+
+ case MTHCA_EVENT_TYPE_COMM_EST:
+ mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
+ IB_EVENT_COMM_EST);
+ break;
+
+ case MTHCA_EVENT_TYPE_SQ_DRAINED:
+ mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
+ IB_EVENT_SQ_DRAINED);
+ break;
+
+ case MTHCA_EVENT_TYPE_WQ_CATAS_ERROR:
+ mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
+ IB_EVENT_QP_FATAL);
+ break;
+
+ case MTHCA_EVENT_TYPE_PATH_MIG_FAILED:
+ mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
+ IB_EVENT_PATH_MIG_ERR);
+ break;
+
+ case MTHCA_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
+ mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
+ IB_EVENT_QP_REQ_ERR);
+ break;
+
+ case MTHCA_EVENT_TYPE_WQ_ACCESS_ERROR:
+ mthca_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
+ IB_EVENT_QP_ACCESS_ERR);
+ break;
+
+ case MTHCA_EVENT_TYPE_CMD:
+ mthca_cmd_event(dev,
+ be16_to_cpu(eqe->event.cmd.token),
+ eqe->event.cmd.status,
+ be64_to_cpu(eqe->event.cmd.out_param));
+ /*
+ * cmd_event() may add more commands.
+ * The card will think the queue has overflowed if
+ * we don't tell it we've been processing events.
+ */
+ set_ci = 1;
+ break;
+
+ case MTHCA_EVENT_TYPE_PORT_CHANGE:
+ port_change(dev,
+ (be32_to_cpu(eqe->event.port_change.port) >> 28) & 3,
+ eqe->subtype == 0x4);
+ break;
+
+ case MTHCA_EVENT_TYPE_CQ_ERROR:
+ mthca_warn(dev, "CQ %s on CQN %08x\n",
+ eqe->event.cq_err.syndrome == 1 ?
+ "overrun" : "access violation",
+ be32_to_cpu(eqe->event.cq_err.cqn));
+ break;
+
+ case MTHCA_EVENT_TYPE_EQ_OVERFLOW:
+ mthca_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
+ break;
+
+ case MTHCA_EVENT_TYPE_EEC_CATAS_ERROR:
+ case MTHCA_EVENT_TYPE_SRQ_CATAS_ERROR:
+ case MTHCA_EVENT_TYPE_LOCAL_CATAS_ERROR:
+ case MTHCA_EVENT_TYPE_ECC_DETECT:
+ default:
+ mthca_warn(dev, "Unhandled event %02x(%02x) on EQ %d\n",
+ eqe->type, eqe->subtype, eq->eqn);
+ break;
+ };
+
+ set_eqe_hw(eqe);
+ ++eq->cons_index;
+ eqes_found = 1;
+
+ if (unlikely(set_ci)) {
+ /*
+ * Conditional on hca_type is OK here because
+ * this is a rare case, not the fast path.
+ */
+ set_eq_ci(dev, eq, eq->cons_index);
+ set_ci = 0;
+ }
+ }
+
+ /*
+ * Rely on caller to set consumer index so that we don't have
+ * to test hca_type in our interrupt handling fast path.
+ */
+ return eqes_found;
+}
+
+static irqreturn_t mthca_tavor_interrupt(int irq, void *dev_ptr, struct pt_regs *regs)
+{
+ struct mthca_dev *dev = dev_ptr;
+ u32 ecr;
+ int i;
+
+ if (dev->eq_table.clr_mask)
+ writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
+
+ ecr = readl(dev->eq_regs.tavor.ecr_base + 4);
+ if (ecr) {
+ writel(ecr, dev->eq_regs.tavor.ecr_base +
+ MTHCA_ECR_CLR_BASE - MTHCA_ECR_BASE + 4);
+
+ for (i = 0; i < MTHCA_NUM_EQ; ++i)
+ if (ecr & dev->eq_table.eq[i].eqn_mask &&
+ mthca_eq_int(dev, &dev->eq_table.eq[i])) {
+ tavor_set_eq_ci(dev, &dev->eq_table.eq[i],
+ dev->eq_table.eq[i].cons_index);
+ tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn);
+ }
+ }
+
+ return IRQ_RETVAL(ecr);
+}
+
+static irqreturn_t mthca_tavor_msi_x_interrupt(int irq, void *eq_ptr,
+ struct pt_regs *regs)
+{
+ struct mthca_eq *eq = eq_ptr;
+ struct mthca_dev *dev = eq->dev;
+
+ mthca_eq_int(dev, eq);
+ tavor_set_eq_ci(dev, eq, eq->cons_index);
+ tavor_eq_req_not(dev, eq->eqn);
+
+ /* MSI-X vectors always belong to us */
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mthca_arbel_interrupt(int irq, void *dev_ptr, struct pt_regs *regs)
+{
+ struct mthca_dev *dev = dev_ptr;
+ int work = 0;
+ int i;
+
+ if (dev->eq_table.clr_mask)
+ writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
+
+ for (i = 0; i < MTHCA_NUM_EQ; ++i)
+ if (mthca_eq_int(dev, &dev->eq_table.eq[i])) {
+ work = 1;
+ arbel_set_eq_ci(dev, &dev->eq_table.eq[i],
+ dev->eq_table.eq[i].cons_index);
+ }
+
+ arbel_eq_req_not(dev, dev->eq_table.arm_mask);
+
+ return IRQ_RETVAL(work);
+}
+
+static irqreturn_t mthca_arbel_msi_x_interrupt(int irq, void *eq_ptr,
+ struct pt_regs *regs)
+{
+ struct mthca_eq *eq = eq_ptr;
+ struct mthca_dev *dev = eq->dev;
+
+ mthca_eq_int(dev, eq);
+ arbel_set_eq_ci(dev, eq, eq->cons_index);
+ arbel_eq_req_not(dev, eq->eqn_mask);
+
+ /* MSI-X vectors always belong to us */
+ return IRQ_HANDLED;
+}
+
+static int __devinit mthca_create_eq(struct mthca_dev *dev,
+ int nent,
+ u8 intr,
+ struct mthca_eq *eq)
+{
+ int npages = (nent * MTHCA_EQ_ENTRY_SIZE + PAGE_SIZE - 1) /
+ PAGE_SIZE;
+ u64 *dma_list = NULL;
+ dma_addr_t t;
+ void *mailbox = NULL;
+ struct mthca_eq_context *eq_context;
+ int err = -ENOMEM;
+ int i;
+ u8 status;
+
+ /* Make sure EQ size is aligned to a power of 2 size. */
+ for (i = 1; i < nent; i <<= 1)
+ ; /* nothing */
+ nent = i;
+
+ eq->dev = dev;
+
+ eq->page_list = kmalloc(npages * sizeof *eq->page_list,
+ GFP_KERNEL);
+ if (!eq->page_list)
+ goto err_out;
+
+ for (i = 0; i < npages; ++i)
+ eq->page_list[i].buf = NULL;
+
+ dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
+ if (!dma_list)
+ goto err_out_free;
+
+ mailbox = kmalloc(sizeof *eq_context + MTHCA_CMD_MAILBOX_EXTRA,
+ GFP_KERNEL);
+ if (!mailbox)
+ goto err_out_free;
+ eq_context = MAILBOX_ALIGN(mailbox);
+
+ for (i = 0; i < npages; ++i) {
+ eq->page_list[i].buf = pci_alloc_consistent(dev->pdev,
+ PAGE_SIZE, &t);
+ if (!eq->page_list[i].buf)
+ goto err_out_free;
+
+ dma_list[i] = t;
+ pci_unmap_addr_set(&eq->page_list[i], mapping, t);
+
+ memset(eq->page_list[i].buf, 0, PAGE_SIZE);
+ }
+
+ for (i = 0; i < nent; ++i)
+ set_eqe_hw(get_eqe(eq, i));
+
+ eq->eqn = mthca_alloc(&dev->eq_table.alloc);
+ if (eq->eqn == -1)
+ goto err_out_free;
+
+ err = mthca_mr_alloc_phys(dev, dev->driver_pd.pd_num,
+ dma_list, PAGE_SHIFT, npages,
+ 0, npages * PAGE_SIZE,
+ MTHCA_MPT_FLAG_LOCAL_WRITE |
+ MTHCA_MPT_FLAG_LOCAL_READ,
+ &eq->mr);
+ if (err)
+ goto err_out_free_eq;
+
+ eq->nent = nent;
+
+ memset(eq_context, 0, sizeof *eq_context);
+ eq_context->flags = cpu_to_be32(MTHCA_EQ_STATUS_OK |
+ MTHCA_EQ_OWNER_HW |
+ MTHCA_EQ_STATE_ARMED |
+ MTHCA_EQ_FLAG_TR);
+ if (dev->hca_type == ARBEL_NATIVE)
+ eq_context->flags |= cpu_to_be32(MTHCA_EQ_STATE_ARBEL);
+
+ eq_context->logsize_usrpage = cpu_to_be32((ffs(nent) - 1) << 24);
+ if (dev->hca_type == ARBEL_NATIVE) {
+ eq_context->arbel_pd = cpu_to_be32(dev->driver_pd.pd_num);
+ } else {
+ eq_context->logsize_usrpage |= cpu_to_be32(dev->driver_uar.index);
+ eq_context->tavor_pd = cpu_to_be32(dev->driver_pd.pd_num);
+ }
+ eq_context->intr = intr;
+ eq_context->lkey = cpu_to_be32(eq->mr.ibmr.lkey);
+
+ err = mthca_SW2HW_EQ(dev, eq_context, eq->eqn, &status);
+ if (err) {
+ mthca_warn(dev, "SW2HW_EQ failed (%d)\n", err);
+ goto err_out_free_mr;
+ }
+ if (status) {
+ mthca_warn(dev, "SW2HW_EQ returned status 0x%02x\n",
+ status);
+ err = -EINVAL;
+ goto err_out_free_mr;
+ }
+
+ kfree(dma_list);
+ kfree(mailbox);
+
+ eq->eqn_mask = swab32(1 << eq->eqn);
+ eq->cons_index = 0;
+
+ dev->eq_table.arm_mask |= eq->eqn_mask;
+
+ mthca_dbg(dev, "Allocated EQ %d with %d entries\n",
+ eq->eqn, nent);
+
+ return err;
+
+ err_out_free_mr:
+ mthca_free_mr(dev, &eq->mr);
+
+ err_out_free_eq:
+ mthca_free(&dev->eq_table.alloc, eq->eqn);
+
+ err_out_free:
+ for (i = 0; i < npages; ++i)
+ if (eq->page_list[i].buf)
+ pci_free_consistent(dev->pdev, PAGE_SIZE,
+ eq->page_list[i].buf,
+ pci_unmap_addr(&eq->page_list[i],
+ mapping));
+
+ kfree(eq->page_list);
+ kfree(dma_list);
+ kfree(mailbox);
+
+ err_out:
+ return err;
+}
+
+static void mthca_free_eq(struct mthca_dev *dev,
+ struct mthca_eq *eq)
+{
+ void *mailbox = NULL;
+ int err;
+ u8 status;
+ int npages = (eq->nent * MTHCA_EQ_ENTRY_SIZE + PAGE_SIZE - 1) /
+ PAGE_SIZE;
+ int i;
+
+ mailbox = kmalloc(sizeof (struct mthca_eq_context) + MTHCA_CMD_MAILBOX_EXTRA,
+ GFP_KERNEL);
+ if (!mailbox)
+ return;
+
+ err = mthca_HW2SW_EQ(dev, MAILBOX_ALIGN(mailbox),
+ eq->eqn, &status);
+ if (err)
+ mthca_warn(dev, "HW2SW_EQ failed (%d)\n", err);
+ if (status)
+ mthca_warn(dev, "HW2SW_EQ returned status 0x%02x\n",
+ status);
+
+ dev->eq_table.arm_mask &= ~eq->eqn_mask;
+
+ if (0) {
+ mthca_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn);
+ for (i = 0; i < sizeof (struct mthca_eq_context) / 4; ++i) {
+ if (i % 4 == 0)
+ printk("[%02x] ", i * 4);
+ printk(" %08x", be32_to_cpup(MAILBOX_ALIGN(mailbox) + i * 4));
+ if ((i + 1) % 4 == 0)
+ printk("\n");
+ }
+ }
+
+ mthca_free_mr(dev, &eq->mr);
+ for (i = 0; i < npages; ++i)
+ pci_free_consistent(dev->pdev, PAGE_SIZE,
+ eq->page_list[i].buf,
+ pci_unmap_addr(&eq->page_list[i], mapping));
+
+ kfree(eq->page_list);
+ kfree(mailbox);
+}
+
+static void mthca_free_irqs(struct mthca_dev *dev)
+{
+ int i;
+
+ if (dev->eq_table.have_irq)
+ free_irq(dev->pdev->irq, dev);
+ for (i = 0; i < MTHCA_NUM_EQ; ++i)
+ if (dev->eq_table.eq[i].have_irq)
+ free_irq(dev->eq_table.eq[i].msi_x_vector,
+ dev->eq_table.eq + i);
+}
+
+static int __devinit mthca_map_reg(struct mthca_dev *dev,
+ unsigned long offset, unsigned long size,
+ void __iomem **map)
+{
+ unsigned long base = pci_resource_start(dev->pdev, 0);
+
+ if (!request_mem_region(base + offset, size, DRV_NAME))
+ return -EBUSY;
+
+ *map = ioremap(base + offset, size);
+ if (!*map) {
+ release_mem_region(base + offset, size);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void mthca_unmap_reg(struct mthca_dev *dev, unsigned long offset,
+ unsigned long size, void __iomem *map)
+{
+ unsigned long base = pci_resource_start(dev->pdev, 0);
+
+ release_mem_region(base + offset, size);
+ iounmap(map);
+}
+
+static int __devinit mthca_map_eq_regs(struct mthca_dev *dev)
+{
+ unsigned long mthca_base;
+
+ mthca_base = pci_resource_start(dev->pdev, 0);
+
+ if (dev->hca_type == ARBEL_NATIVE) {
+ /*
+ * We assume that the EQ arm and EQ set CI registers
+ * fall within the first BAR. We can't trust the
+ * values firmware gives us, since those addresses are
+ * valid on the HCA's side of the PCI bus but not
+ * necessarily the host side.
+ */
+ if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
+ dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
+ &dev->clr_base)) {
+ mthca_err(dev, "Couldn't map interrupt clear register, "
+ "aborting.\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * Add 4 because we limit ourselves to EQs 0 ... 31,
+ * so we only need the low word of the register.
+ */
+ if (mthca_map_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
+ dev->fw.arbel.eq_arm_base) + 4, 4,
+ &dev->eq_regs.arbel.eq_arm)) {
+ mthca_err(dev, "Couldn't map interrupt clear register, "
+ "aborting.\n");
+ mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
+ dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
+ dev->clr_base);
+ return -ENOMEM;
+ }
+
+ if (mthca_map_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
+ dev->fw.arbel.eq_set_ci_base,
+ MTHCA_EQ_SET_CI_SIZE,
+ &dev->eq_regs.arbel.eq_set_ci_base)) {
+ mthca_err(dev, "Couldn't map interrupt clear register, "
+ "aborting.\n");
+ mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
+ dev->fw.arbel.eq_arm_base) + 4, 4,
+ dev->eq_regs.arbel.eq_arm);
+ mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
+ dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
+ dev->clr_base);
+ return -ENOMEM;
+ }
+ } else {
+ if (mthca_map_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
+ &dev->clr_base)) {
+ mthca_err(dev, "Couldn't map interrupt clear register, "
+ "aborting.\n");
+ return -ENOMEM;
+ }
+
+ if (mthca_map_reg(dev, MTHCA_ECR_BASE,
+ MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE,
+ &dev->eq_regs.tavor.ecr_base)) {
+ mthca_err(dev, "Couldn't map ecr register, "
+ "aborting.\n");
+ mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
+ dev->clr_base);
+ return -ENOMEM;
+ }
+ }
+
+ return 0;
+
+}
+
+static void __devexit mthca_unmap_eq_regs(struct mthca_dev *dev)
+{
+ if (dev->hca_type == ARBEL_NATIVE) {
+ mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
+ dev->fw.arbel.eq_set_ci_base,
+ MTHCA_EQ_SET_CI_SIZE,
+ dev->eq_regs.arbel.eq_set_ci_base);
+ mthca_unmap_reg(dev, ((pci_resource_len(dev->pdev, 0) - 1) &
+ dev->fw.arbel.eq_arm_base) + 4, 4,
+ dev->eq_regs.arbel.eq_arm);
+ mthca_unmap_reg(dev, (pci_resource_len(dev->pdev, 0) - 1) &
+ dev->fw.arbel.clr_int_base, MTHCA_CLR_INT_SIZE,
+ dev->clr_base);
+ } else {
+ mthca_unmap_reg(dev, MTHCA_ECR_BASE,
+ MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE,
+ dev->eq_regs.tavor.ecr_base);
+ mthca_unmap_reg(dev, MTHCA_CLR_INT_BASE, MTHCA_CLR_INT_SIZE,
+ dev->clr_base);
+ }
+}
+
+int __devinit mthca_map_eq_icm(struct mthca_dev *dev, u64 icm_virt)
+{
+ int ret;
+ u8 status;
+
+ /*
+ * We assume that mapping one page is enough for the whole EQ
+ * context table. This is fine with all current HCAs, because
+ * we only use 32 EQs and each EQ uses 32 bytes of context
+ * memory, or 1 KB total.
+ */
+ dev->eq_table.icm_virt = icm_virt;
+ dev->eq_table.icm_page = alloc_page(GFP_HIGHUSER);
+ if (!dev->eq_table.icm_page)
+ return -ENOMEM;
+ dev->eq_table.icm_dma = pci_map_page(dev->pdev, dev->eq_table.icm_page, 0,
+ PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+ if (pci_dma_mapping_error(dev->eq_table.icm_dma)) {
+ __free_page(dev->eq_table.icm_page);
+ return -ENOMEM;
+ }
+
+ ret = mthca_MAP_ICM_page(dev, dev->eq_table.icm_dma, icm_virt, &status);
+ if (!ret && status)
+ ret = -EINVAL;
+ if (ret) {
+ pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
+ PCI_DMA_BIDIRECTIONAL);
+ __free_page(dev->eq_table.icm_page);
+ }
+
+ return ret;
+}
+
+void __devexit mthca_unmap_eq_icm(struct mthca_dev *dev)
+{
+ u8 status;
+
+ mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, PAGE_SIZE / 4096, &status);
+ pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
+ PCI_DMA_BIDIRECTIONAL);
+ __free_page(dev->eq_table.icm_page);
+}
+
+int __devinit mthca_init_eq_table(struct mthca_dev *dev)
+{
+ int err;
+ u8 status;
+ u8 intr;
+ int i;
+
+ err = mthca_alloc_init(&dev->eq_table.alloc,
+ dev->limits.num_eqs,
+ dev->limits.num_eqs - 1,
+ dev->limits.reserved_eqs);
+ if (err)
+ return err;
+
+ err = mthca_map_eq_regs(dev);
+ if (err)
+ goto err_out_free;
+
+ if (dev->mthca_flags & MTHCA_FLAG_MSI ||
+ dev->mthca_flags & MTHCA_FLAG_MSI_X) {
+ dev->eq_table.clr_mask = 0;
+ } else {
+ dev->eq_table.clr_mask =
+ swab32(1 << (dev->eq_table.inta_pin & 31));
+ dev->eq_table.clr_int = dev->clr_base +
+ (dev->eq_table.inta_pin < 31 ? 4 : 0);
+ }
+
+ dev->eq_table.arm_mask = 0;
+
+ intr = (dev->mthca_flags & MTHCA_FLAG_MSI) ?
+ 128 : dev->eq_table.inta_pin;
+
+ err = mthca_create_eq(dev, dev->limits.num_cqs,
+ (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 128 : intr,
+ &dev->eq_table.eq[MTHCA_EQ_COMP]);
+ if (err)
+ goto err_out_unmap;
+
+ err = mthca_create_eq(dev, MTHCA_NUM_ASYNC_EQE,
+ (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 129 : intr,
+ &dev->eq_table.eq[MTHCA_EQ_ASYNC]);
+ if (err)
+ goto err_out_comp;
+
+ err = mthca_create_eq(dev, MTHCA_NUM_CMD_EQE,
+ (dev->mthca_flags & MTHCA_FLAG_MSI_X) ? 130 : intr,
+ &dev->eq_table.eq[MTHCA_EQ_CMD]);
+ if (err)
+ goto err_out_async;
+
+ if (dev->mthca_flags & MTHCA_FLAG_MSI_X) {
+ static const char *eq_name[] = {
+ [MTHCA_EQ_COMP] = DRV_NAME " (comp)",
+ [MTHCA_EQ_ASYNC] = DRV_NAME " (async)",
+ [MTHCA_EQ_CMD] = DRV_NAME " (cmd)"
+ };
+
+ for (i = 0; i < MTHCA_NUM_EQ; ++i) {
+ err = request_irq(dev->eq_table.eq[i].msi_x_vector,
+ dev->hca_type == ARBEL_NATIVE ?
+ mthca_arbel_msi_x_interrupt :
+ mthca_tavor_msi_x_interrupt,
+ 0, eq_name[i], dev->eq_table.eq + i);
+ if (err)
+ goto err_out_cmd;
+ dev->eq_table.eq[i].have_irq = 1;
+ }
+ } else {
+ err = request_irq(dev->pdev->irq,
+ dev->hca_type == ARBEL_NATIVE ?
+ mthca_arbel_interrupt :
+ mthca_tavor_interrupt,
+ SA_SHIRQ, DRV_NAME, dev);
+ if (err)
+ goto err_out_cmd;
+ dev->eq_table.have_irq = 1;
+ }
+
+ err = mthca_MAP_EQ(dev, async_mask(dev),
+ 0, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status);
+ if (err)
+ mthca_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
+ dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, err);
+ if (status)
+ mthca_warn(dev, "MAP_EQ for async EQ %d returned status 0x%02x\n",
+ dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, status);
+
+ err = mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK,
+ 0, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status);
+ if (err)
+ mthca_warn(dev, "MAP_EQ for cmd EQ %d failed (%d)\n",
+ dev->eq_table.eq[MTHCA_EQ_CMD].eqn, err);
+ if (status)
+ mthca_warn(dev, "MAP_EQ for cmd EQ %d returned status 0x%02x\n",
+ dev->eq_table.eq[MTHCA_EQ_CMD].eqn, status);
+
+ for (i = 0; i < MTHCA_EQ_CMD; ++i)
+ if (dev->hca_type == ARBEL_NATIVE)
+ arbel_eq_req_not(dev, dev->eq_table.eq[i].eqn_mask);
+ else
+ tavor_eq_req_not(dev, dev->eq_table.eq[i].eqn);
+
+ return 0;
+
+err_out_cmd:
+ mthca_free_irqs(dev);
+ mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_CMD]);
+
+err_out_async:
+ mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_ASYNC]);
+
+err_out_comp:
+ mthca_free_eq(dev, &dev->eq_table.eq[MTHCA_EQ_COMP]);
+
+err_out_unmap:
+ mthca_unmap_eq_regs(dev);
+
+err_out_free:
+ mthca_alloc_cleanup(&dev->eq_table.alloc);
+ return err;
+}
+
+void __devexit mthca_cleanup_eq_table(struct mthca_dev *dev)
+{
+ u8 status;
+ int i;
+
+ mthca_free_irqs(dev);
+
+ mthca_MAP_EQ(dev, async_mask(dev),
+ 1, dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn, &status);
+ mthca_MAP_EQ(dev, MTHCA_CMD_EVENT_MASK,
+ 1, dev->eq_table.eq[MTHCA_EQ_CMD].eqn, &status);
+
+ for (i = 0; i < MTHCA_NUM_EQ; ++i)
+ mthca_free_eq(dev, &dev->eq_table.eq[i]);
+
+ mthca_unmap_eq_regs(dev);
+
+ mthca_alloc_cleanup(&dev->eq_table.alloc);
+}