[PATCH][v3][12/21] Add Mellanox HCA low-level driver (QP/CQ)

From: Roland Dreier
Date: Mon Dec 13 2004 - 14:04:25 EST

Add CQ (completion queue) and QP (queue pair) code for Mellanox HCA driver.

Signed-off-by: Roland Dreier <roland@xxxxxxxxxxx>


--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_cq.c 2004-12-13 09:44:45.891964666 -0800
@@ -0,0 +1,817 @@
+/*
+ * 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 at
+ * <http://www.fsf.org/copyleft/gpl.html>, or the OpenIB.org BSD
+ * license, available in the LICENSE.TXT file accompanying this
+ * software. These details are also available at
+ * <http://openib.org/license.html>.
+ *
+ * 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.
+ *
+ * Copyright (c) 2004 Topspin Communications. All rights reserved.
+ *
+ * $Id: mthca_cq.c 1298 2004-11-29 03:26:10Z roland $
+ */
+
+#include <linux/init.h>
+
+#include <ib_pack.h>
+
+#include "mthca_dev.h"
+#include "mthca_cmd.h"
+
+enum {
+ MTHCA_MAX_DIRECT_CQ_SIZE = 4 * PAGE_SIZE
+};
+
+enum {
+ MTHCA_CQ_ENTRY_SIZE = 0x20
+};
+
+/*
+ * Must be packed because start is 64 bits but only aligned to 32 bits.
+ */
+struct mthca_cq_context {
+ u32 flags;
+ u64 start;
+ u32 logsize_usrpage;
+ u32 error_eqn;
+ u32 comp_eqn;
+ u32 pd;
+ u32 lkey;
+ u32 last_notified_index;
+ u32 solicit_producer_index;
+ u32 consumer_index;
+ u32 producer_index;
+ u32 cqn;
+ u32 reserved[3];
+} __attribute__((packed));
+
+#define MTHCA_CQ_STATUS_OK ( 0 << 28)
+#define MTHCA_CQ_STATUS_OVERFLOW ( 9 << 28)
+#define MTHCA_CQ_STATUS_WRITE_FAIL (10 << 28)
+#define MTHCA_CQ_FLAG_TR ( 1 << 18)
+#define MTHCA_CQ_FLAG_OI ( 1 << 17)
+#define MTHCA_CQ_STATE_DISARMED ( 0 << 8)
+#define MTHCA_CQ_STATE_ARMED ( 1 << 8)
+#define MTHCA_CQ_STATE_ARMED_SOL ( 4 << 8)
+#define MTHCA_EQ_STATE_FIRED (10 << 8)
+
+enum {
+ MTHCA_ERROR_CQE_OPCODE_MASK = 0xfe
+};
+
+enum {
+ SYNDROME_LOCAL_LENGTH_ERR = 0x01,
+ SYNDROME_LOCAL_QP_OP_ERR = 0x02,
+ SYNDROME_LOCAL_EEC_OP_ERR = 0x03,
+ SYNDROME_LOCAL_PROT_ERR = 0x04,
+ SYNDROME_WR_FLUSH_ERR = 0x05,
+ SYNDROME_MW_BIND_ERR = 0x06,
+ SYNDROME_BAD_RESP_ERR = 0x10,
+ SYNDROME_LOCAL_ACCESS_ERR = 0x11,
+ SYNDROME_REMOTE_INVAL_REQ_ERR = 0x12,
+ SYNDROME_REMOTE_ACCESS_ERR = 0x13,
+ SYNDROME_REMOTE_OP_ERR = 0x14,
+ SYNDROME_RETRY_EXC_ERR = 0x15,
+ SYNDROME_RNR_RETRY_EXC_ERR = 0x16,
+ SYNDROME_LOCAL_RDD_VIOL_ERR = 0x20,
+ SYNDROME_REMOTE_INVAL_RD_REQ_ERR = 0x21,
+ SYNDROME_REMOTE_ABORTED_ERR = 0x22,
+ SYNDROME_INVAL_EECN_ERR = 0x23,
+ SYNDROME_INVAL_EEC_STATE_ERR = 0x24
+};
+
+struct mthca_cqe {
+ u32 my_qpn;
+ u32 my_ee;
+ u32 rqpn;
+ u16 sl_g_mlpath;
+ u16 rlid;
+ u32 imm_etype_pkey_eec;
+ u32 byte_cnt;
+ u32 wqe;
+ u8 opcode;
+ u8 is_send;
+ u8 reserved;
+ u8 owner;
+};
+
+struct mthca_err_cqe {
+ u32 my_qpn;
+ u32 reserved1[3];
+ u8 syndrome;
+ u8 reserved2;
+ u16 db_cnt;
+ u32 reserved3;
+ u32 wqe;
+ u8 opcode;
+ u8 reserved4[2];
+ u8 owner;
+};
+
+#define MTHCA_CQ_ENTRY_OWNER_SW (0 << 7)
+#define MTHCA_CQ_ENTRY_OWNER_HW (1 << 7)
+
+#define MTHCA_CQ_DB_INC_CI (1 << 24)
+#define MTHCA_CQ_DB_REQ_NOT (2 << 24)
+#define MTHCA_CQ_DB_REQ_NOT_SOL (3 << 24)
+#define MTHCA_CQ_DB_SET_CI (4 << 24)
+#define MTHCA_CQ_DB_REQ_NOT_MULT (5 << 24)
+
+static inline struct mthca_cqe *get_cqe(struct mthca_cq *cq, int entry)
+{
+ if (cq->is_direct)
+ return cq->queue.direct.buf + (entry * MTHCA_CQ_ENTRY_SIZE);
+ else
+ return cq->queue.page_list[entry * MTHCA_CQ_ENTRY_SIZE / PAGE_SIZE].buf
+ + (entry * MTHCA_CQ_ENTRY_SIZE) % PAGE_SIZE;
+}
+
+static inline int cqe_sw(struct mthca_cq *cq, int i)
+{
+ return !(MTHCA_CQ_ENTRY_OWNER_HW &
+ get_cqe(cq, i)->owner);
+}
+
+static inline int next_cqe_sw(struct mthca_cq *cq)
+{
+ return cqe_sw(cq, cq->cons_index);
+}
+
+static inline void set_cqe_hw(struct mthca_cq *cq, int entry)
+{
+ get_cqe(cq, entry)->owner = MTHCA_CQ_ENTRY_OWNER_HW;
+}
+
+static inline void inc_cons_index(struct mthca_dev *dev, struct mthca_cq *cq,
+ int nent)
+{
+ u32 doorbell[2];
+
+ doorbell[0] = cpu_to_be32(MTHCA_CQ_DB_INC_CI | cq->cqn);
+ doorbell[1] = cpu_to_be32(nent - 1);
+
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_CQ_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+}
+
+void mthca_cq_event(struct mthca_dev *dev, u32 cqn)
+{
+ struct mthca_cq *cq;
+
+ spin_lock(&dev->cq_table.lock);
+ cq = mthca_array_get(&dev->cq_table.cq, cqn & (dev->limits.num_cqs - 1));
+ if (cq)
+ atomic_inc(&cq->refcount);
+ spin_unlock(&dev->cq_table.lock);
+
+ if (!cq) {
+ mthca_warn(dev, "Completion event for bogus CQ %08x\n", cqn);
+ return;
+ }
+
+ cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
+
+ if (atomic_dec_and_test(&cq->refcount))
+ wake_up(&cq->wait);
+}
+
+void mthca_cq_clean(struct mthca_dev *dev, u32 cqn, u32 qpn)
+{
+ struct mthca_cq *cq;
+ struct mthca_cqe *cqe;
+ int prod_index;
+ int nfreed = 0;
+
+ spin_lock_irq(&dev->cq_table.lock);
+ cq = mthca_array_get(&dev->cq_table.cq, cqn & (dev->limits.num_cqs - 1));
+ if (cq)
+ atomic_inc(&cq->refcount);
+ spin_unlock_irq(&dev->cq_table.lock);
+
+ if (!cq)
+ return;
+
+ spin_lock_irq(&cq->lock);
+
+ /*
+ * First we need to find the current producer index, so we
+ * know where to start cleaning from. It doesn't matter if HW
+ * adds new entries after this loop -- the QP we're worried
+ * about is already in RESET, so the new entries won't come
+ * from our QP and therefore don't need to be checked.
+ */
+ for (prod_index = cq->cons_index;
+ cqe_sw(cq, prod_index & (cq->ibcq.cqe - 1));
+ ++prod_index)
+ if (prod_index == cq->cons_index + cq->ibcq.cqe - 1)
+ break;
+
+ if (0)
+ mthca_dbg(dev, "Cleaning QPN %06x from CQN %06x; ci %d, pi %d\n",
+ qpn, cqn, cq->cons_index, prod_index);
+
+ /*
+ * Now sweep backwards through the CQ, removing CQ entries
+ * that match our QP by copying older entries on top of them.
+ */
+ while (prod_index > cq->cons_index) {
+ cqe = get_cqe(cq, (prod_index - 1) & (cq->ibcq.cqe - 1));
+ if (cqe->my_qpn == cpu_to_be32(qpn))
+ ++nfreed;
+ else if (nfreed)
+ memcpy(get_cqe(cq, (prod_index - 1 + nfreed) &
+ (cq->ibcq.cqe - 1)),
+ cqe,
+ MTHCA_CQ_ENTRY_SIZE);
+ --prod_index;
+ }
+
+ if (nfreed) {
+ wmb();
+ inc_cons_index(dev, cq, nfreed);
+ cq->cons_index = (cq->cons_index + nfreed) & (cq->ibcq.cqe - 1);
+ }
+
+ spin_unlock_irq(&cq->lock);
+ if (atomic_dec_and_test(&cq->refcount))
+ wake_up(&cq->wait);
+}
+
+static int handle_error_cqe(struct mthca_dev *dev, struct mthca_cq *cq,
+ struct mthca_qp *qp, int wqe_index, int is_send,
+ struct mthca_err_cqe *cqe,
+ struct ib_wc *entry, int *free_cqe)
+{
+ int err;
+ int dbd;
+ u32 new_wqe;
+
+ if (1 && cqe->syndrome != SYNDROME_WR_FLUSH_ERR) {
+ int j;
+
+ mthca_dbg(dev, "%x/%d: error CQE -> QPN %06x, WQE @ %08x\n",
+ cq->cqn, cq->cons_index, be32_to_cpu(cqe->my_qpn),
+ be32_to_cpu(cqe->wqe));
+
+ for (j = 0; j < 8; ++j)
+ printk(KERN_DEBUG " [%2x] %08x\n",
+ j * 4, be32_to_cpu(((u32 *) cqe)[j]));
+ }
+
+ /*
+ * For completions in error, only work request ID, status (and
+ * freed resource count for RD) have to be set.
+ */
+ switch (cqe->syndrome) {
+ case SYNDROME_LOCAL_LENGTH_ERR:
+ entry->status = IB_WC_LOC_LEN_ERR;
+ break;
+ case SYNDROME_LOCAL_QP_OP_ERR:
+ entry->status = IB_WC_LOC_QP_OP_ERR;
+ break;
+ case SYNDROME_LOCAL_EEC_OP_ERR:
+ entry->status = IB_WC_LOC_EEC_OP_ERR;
+ break;
+ case SYNDROME_LOCAL_PROT_ERR:
+ entry->status = IB_WC_LOC_PROT_ERR;
+ break;
+ case SYNDROME_WR_FLUSH_ERR:
+ entry->status = IB_WC_WR_FLUSH_ERR;
+ break;
+ case SYNDROME_MW_BIND_ERR:
+ entry->status = IB_WC_MW_BIND_ERR;
+ break;
+ case SYNDROME_BAD_RESP_ERR:
+ entry->status = IB_WC_BAD_RESP_ERR;
+ break;
+ case SYNDROME_LOCAL_ACCESS_ERR:
+ entry->status = IB_WC_LOC_ACCESS_ERR;
+ break;
+ case SYNDROME_REMOTE_INVAL_REQ_ERR:
+ entry->status = IB_WC_REM_INV_REQ_ERR;
+ break;
+ case SYNDROME_REMOTE_ACCESS_ERR:
+ entry->status = IB_WC_REM_ACCESS_ERR;
+ break;
+ case SYNDROME_REMOTE_OP_ERR:
+ entry->status = IB_WC_REM_OP_ERR;
+ break;
+ case SYNDROME_RETRY_EXC_ERR:
+ entry->status = IB_WC_RETRY_EXC_ERR;
+ break;
+ case SYNDROME_RNR_RETRY_EXC_ERR:
+ entry->status = IB_WC_RNR_RETRY_EXC_ERR;
+ break;
+ case SYNDROME_LOCAL_RDD_VIOL_ERR:
+ entry->status = IB_WC_LOC_RDD_VIOL_ERR;
+ break;
+ case SYNDROME_REMOTE_INVAL_RD_REQ_ERR:
+ entry->status = IB_WC_REM_INV_RD_REQ_ERR;
+ break;
+ case SYNDROME_REMOTE_ABORTED_ERR:
+ entry->status = IB_WC_REM_ABORT_ERR;
+ break;
+ case SYNDROME_INVAL_EECN_ERR:
+ entry->status = IB_WC_INV_EECN_ERR;
+ break;
+ case SYNDROME_INVAL_EEC_STATE_ERR:
+ entry->status = IB_WC_INV_EEC_STATE_ERR;
+ break;
+ default:
+ entry->status = IB_WC_GENERAL_ERR;
+ break;
+ }
+
+ err = mthca_free_err_wqe(qp, is_send, wqe_index, &dbd, &new_wqe);
+ if (err)
+ return err;
+
+ /*
+ * If we're at the end of the WQE chain, or we've used up our
+ * doorbell count, free the CQE. Otherwise just update it for
+ * the next poll operation.
+ */
+ if (!(new_wqe & cpu_to_be32(0x3f)) || (!cqe->db_cnt && dbd))
+ return 0;
+
+ cqe->db_cnt = cpu_to_be16(be16_to_cpu(cqe->db_cnt) - dbd);
+ cqe->wqe = new_wqe;
+ cqe->syndrome = SYNDROME_WR_FLUSH_ERR;
+
+ *free_cqe = 0;
+
+ return 0;
+}
+
+static void dump_cqe(struct mthca_cqe *cqe)
+{
+ int j;
+
+ for (j = 0; j < 8; ++j)
+ printk(KERN_DEBUG " [%2x] %08x\n",
+ j * 4, be32_to_cpu(((u32 *) cqe)[j]));
+}
+
+static inline int mthca_poll_one(struct mthca_dev *dev,
+ struct mthca_cq *cq,
+ struct mthca_qp **cur_qp,
+ int *freed,
+ struct ib_wc *entry)
+{
+ struct mthca_wq *wq;
+ struct mthca_cqe *cqe;
+ int wqe_index;
+ int is_error = 0;
+ int is_send;
+ int free_cqe = 1;
+ int err = 0;
+
+ if (!next_cqe_sw(cq))
+ return -EAGAIN;
+
+ rmb();
+
+ cqe = get_cqe(cq, cq->cons_index);
+
+ if (0) {
+ mthca_dbg(dev, "%x/%d: CQE -> QPN %06x, WQE @ %08x\n",
+ cq->cqn, cq->cons_index, be32_to_cpu(cqe->my_qpn),
+ be32_to_cpu(cqe->wqe));
+
+ dump_cqe(cqe);
+ }
+
+ if ((cqe->opcode & MTHCA_ERROR_CQE_OPCODE_MASK) ==
+ MTHCA_ERROR_CQE_OPCODE_MASK) {
+ is_error = 1;
+ is_send = cqe->opcode & 1;
+ } else
+ is_send = cqe->is_send & 0x80;
+
+ if (!*cur_qp || be32_to_cpu(cqe->my_qpn) != (*cur_qp)->qpn) {
+ if (*cur_qp) {
+ spin_unlock(&(*cur_qp)->lock);
+ if (atomic_dec_and_test(&(*cur_qp)->refcount))
+ wake_up(&(*cur_qp)->wait);
+ }
+
+ spin_lock(&dev->qp_table.lock);
+ *cur_qp = mthca_array_get(&dev->qp_table.qp,
+ be32_to_cpu(cqe->my_qpn) &
+ (dev->limits.num_qps - 1));
+ if (*cur_qp)
+ atomic_inc(&(*cur_qp)->refcount);
+ spin_unlock(&dev->qp_table.lock);
+
+ if (!*cur_qp) {
+ mthca_warn(dev, "CQ entry for unknown QP %06x\n",
+ be32_to_cpu(cqe->my_qpn) & 0xffffff);
+ err = -EINVAL;
+ goto out;
+ }
+
+ spin_lock(&(*cur_qp)->lock);
+ }
+
+ if (is_send) {
+ wq = &(*cur_qp)->sq;
+ wqe_index = ((be32_to_cpu(cqe->wqe) - (*cur_qp)->send_wqe_offset)
+ >> wq->wqe_shift);
+ entry->wr_id = (*cur_qp)->wrid[wqe_index +
+ (*cur_qp)->rq.max];
+ } else {
+ wq = &(*cur_qp)->rq;
+ wqe_index = be32_to_cpu(cqe->wqe) >> wq->wqe_shift;
+ entry->wr_id = (*cur_qp)->wrid[wqe_index];
+ }
+
+ if (wq->last_comp < wqe_index)
+ wq->cur -= wqe_index - wq->last_comp;
+ else
+ wq->cur -= wq->max - wq->last_comp + wqe_index;
+
+ wq->last_comp = wqe_index;
+
+ if (0)
+ mthca_dbg(dev, "%s completion for QP %06x, index %d (nr %d)\n",
+ is_send ? "Send" : "Receive",
+ (*cur_qp)->qpn, wqe_index, wq->max);
+
+ if (is_error) {
+ err = handle_error_cqe(dev, cq, *cur_qp, wqe_index, is_send,
+ (struct mthca_err_cqe *) cqe,
+ entry, &free_cqe);
+ goto out;
+ }
+
+ if (is_send) {
+ entry->opcode = IB_WC_SEND; /* XXX */
+ } else {
+ entry->byte_len = be32_to_cpu(cqe->byte_cnt);
+ switch (cqe->opcode & 0x1f) {
+ case IB_OPCODE_SEND_LAST_WITH_IMMEDIATE:
+ case IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE:
+ entry->wc_flags = IB_WC_WITH_IMM;
+ entry->imm_data = cqe->imm_etype_pkey_eec;
+ entry->opcode = IB_WC_RECV;
+ break;
+ case IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE:
+ case IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE:
+ entry->wc_flags = IB_WC_WITH_IMM;
+ entry->imm_data = cqe->imm_etype_pkey_eec;
+ entry->opcode = IB_WC_RECV_RDMA_WITH_IMM;
+ break;
+ default:
+ entry->wc_flags = 0;
+ entry->opcode = IB_WC_RECV;
+ break;
+ }
+ entry->slid = be16_to_cpu(cqe->rlid);
+ entry->sl = be16_to_cpu(cqe->sl_g_mlpath) >> 12;
+ entry->src_qp = be32_to_cpu(cqe->rqpn) & 0xffffff;
+ entry->dlid_path_bits = be16_to_cpu(cqe->sl_g_mlpath) & 0x7f;
+ entry->pkey_index = be32_to_cpu(cqe->imm_etype_pkey_eec) >> 16;
+ entry->wc_flags |= be16_to_cpu(cqe->sl_g_mlpath) & 0x80 ?
+ IB_WC_GRH : 0;
+ }
+
+ entry->status = IB_WC_SUCCESS;
+
+ out:
+ if (free_cqe) {
+ set_cqe_hw(cq, cq->cons_index);
+ ++(*freed);
+ cq->cons_index = (cq->cons_index + 1) & (cq->ibcq.cqe - 1);
+ }
+
+ return err;
+}
+
+int mthca_poll_cq(struct ib_cq *ibcq, int num_entries,
+ struct ib_wc *entry)
+{
+ struct mthca_dev *dev = to_mdev(ibcq->device);
+ struct mthca_cq *cq = to_mcq(ibcq);
+ struct mthca_qp *qp = NULL;
+ unsigned long flags;
+ int err = 0;
+ int freed = 0;
+ int npolled;
+
+ spin_lock_irqsave(&cq->lock, flags);
+
+ for (npolled = 0; npolled < num_entries; ++npolled) {
+ err = mthca_poll_one(dev, cq, &qp,
+ &freed, entry + npolled);
+ if (err)
+ break;
+ }
+
+ if (qp) {
+ spin_unlock(&qp->lock);
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+ }
+
+ wmb();
+ inc_cons_index(dev, cq, freed);
+
+ spin_unlock_irqrestore(&cq->lock, flags);
+
+ return err == 0 || err == -EAGAIN ? npolled : err;
+}
+
+void mthca_arm_cq(struct mthca_dev *dev, struct mthca_cq *cq,
+ int solicited)
+{
+ u32 doorbell[2];
+
+ doorbell[0] = cpu_to_be32((solicited ?
+ MTHCA_CQ_DB_REQ_NOT_SOL :
+ MTHCA_CQ_DB_REQ_NOT) |
+ cq->cqn);
+ doorbell[1] = 0xffffffff;
+
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_CQ_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+}
+
+int mthca_init_cq(struct mthca_dev *dev, int nent,
+ struct mthca_cq *cq)
+{
+ int size = nent * MTHCA_CQ_ENTRY_SIZE;
+ dma_addr_t t;
+ void *mailbox = NULL;
+ int npages, shift;
+ u64 *dma_list = NULL;
+ struct mthca_cq_context *cq_context;
+ int err = -ENOMEM;
+ u8 status;
+ int i;
+
+ might_sleep();
+
+ mailbox = kmalloc(sizeof (struct mthca_cq_context) + MTHCA_CMD_MAILBOX_EXTRA,
+ GFP_KERNEL);
+ if (!mailbox)
+ goto err_out;
+
+ cq_context = MAILBOX_ALIGN(mailbox);
+
+ if (size <= MTHCA_MAX_DIRECT_CQ_SIZE) {
+ if (0)
+ mthca_dbg(dev, "Creating direct CQ of size %d\n", size);
+
+ cq->is_direct = 1;
+ npages = 1;
+ shift = get_order(size) + PAGE_SHIFT;
+
+ cq->queue.direct.buf = pci_alloc_consistent(dev->pdev,
+ size, &t);
+ if (!cq->queue.direct.buf)
+ goto err_out;
+
+ pci_unmap_addr_set(&cq->queue.direct, mapping, t);
+
+ memset(cq->queue.direct.buf, 0, size);
+
+ while (t & ((1 << shift) - 1)) {
+ --shift;
+ npages *= 2;
+ }
+
+ dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
+ if (!dma_list)
+ goto err_out_free;
+
+ for (i = 0; i < npages; ++i)
+ dma_list[i] = t + i * (1 << shift);
+ } else {
+ cq->is_direct = 0;
+ npages = (size + PAGE_SIZE - 1) / PAGE_SIZE;
+ shift = PAGE_SHIFT;
+
+ if (0)
+ mthca_dbg(dev, "Creating indirect CQ with %d pages\n", npages);
+
+ dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
+ if (!dma_list)
+ goto err_out;
+
+ cq->queue.page_list = kmalloc(npages * sizeof *cq->queue.page_list,
+ GFP_KERNEL);
+ if (!cq->queue.page_list)
+ goto err_out;
+
+ for (i = 0; i < npages; ++i)
+ cq->queue.page_list[i].buf = NULL;
+
+ for (i = 0; i < npages; ++i) {
+ cq->queue.page_list[i].buf =
+ pci_alloc_consistent(dev->pdev, PAGE_SIZE, &t);
+ if (!cq->queue.page_list[i].buf)
+ goto err_out_free;
+
+ dma_list[i] = t;
+ pci_unmap_addr_set(&cq->queue.page_list[i], mapping, t);
+
+ memset(cq->queue.page_list[i].buf, 0, PAGE_SIZE);
+ }
+ }
+
+ for (i = 0; i < nent; ++i)
+ set_cqe_hw(cq, i);
+
+ cq->cqn = mthca_alloc(&dev->cq_table.alloc);
+ if (cq->cqn == -1)
+ goto err_out_free;
+
+ err = mthca_mr_alloc_phys(dev, dev->driver_pd.pd_num,
+ dma_list, shift, npages,
+ 0, size,
+ MTHCA_MPT_FLAG_LOCAL_WRITE |
+ MTHCA_MPT_FLAG_LOCAL_READ,
+ &cq->mr);
+ if (err)
+ goto err_out_free_cq;
+
+ spin_lock_init(&cq->lock);
+ atomic_set(&cq->refcount, 1);
+ init_waitqueue_head(&cq->wait);
+
+ memset(cq_context, 0, sizeof *cq_context);
+ cq_context->flags = cpu_to_be32(MTHCA_CQ_STATUS_OK |
+ MTHCA_CQ_STATE_DISARMED |
+ MTHCA_CQ_FLAG_TR);
+ cq_context->start = cpu_to_be64(0);
+ cq_context->logsize_usrpage = cpu_to_be32((ffs(nent) - 1) << 24 |
+ MTHCA_KAR_PAGE);
+ cq_context->error_eqn = cpu_to_be32(dev->eq_table.eq[MTHCA_EQ_ASYNC].eqn);
+ cq_context->comp_eqn = cpu_to_be32(dev->eq_table.eq[MTHCA_EQ_COMP].eqn);
+ cq_context->pd = cpu_to_be32(dev->driver_pd.pd_num);
+ cq_context->lkey = cpu_to_be32(cq->mr.ibmr.lkey);
+ cq_context->cqn = cpu_to_be32(cq->cqn);
+
+ err = mthca_SW2HW_CQ(dev, cq_context, cq->cqn, &status);
+ if (err) {
+ mthca_warn(dev, "SW2HW_CQ failed (%d)\n", err);
+ goto err_out_free_mr;
+ }
+
+ if (status) {
+ mthca_warn(dev, "SW2HW_CQ returned status 0x%02x\n",
+ status);
+ err = -EINVAL;
+ goto err_out_free_mr;
+ }
+
+ spin_lock_irq(&dev->cq_table.lock);
+ if (mthca_array_set(&dev->cq_table.cq,
+ cq->cqn & (dev->limits.num_cqs - 1),
+ cq)) {
+ spin_unlock_irq(&dev->cq_table.lock);
+ goto err_out_free_mr;
+ }
+ spin_unlock_irq(&dev->cq_table.lock);
+
+ cq->cons_index = 0;
+
+ kfree(dma_list);
+ kfree(mailbox);
+
+ return 0;
+
+ err_out_free_mr:
+ mthca_free_mr(dev, &cq->mr);
+
+ err_out_free_cq:
+ mthca_free(&dev->cq_table.alloc, cq->cqn);
+
+ err_out_free:
+ if (cq->is_direct)
+ pci_free_consistent(dev->pdev, size,
+ cq->queue.direct.buf,
+ pci_unmap_addr(&cq->queue.direct, mapping));
+ else {
+ for (i = 0; i < npages; ++i)
+ if (cq->queue.page_list[i].buf)
+ pci_free_consistent(dev->pdev, PAGE_SIZE,
+ cq->queue.page_list[i].buf,
+ pci_unmap_addr(&cq->queue.page_list[i],
+ mapping));
+
+ kfree(cq->queue.page_list);
+ }
+
+ err_out:
+ kfree(dma_list);
+ kfree(mailbox);
+
+ return err;
+}
+
+void mthca_free_cq(struct mthca_dev *dev,
+ struct mthca_cq *cq)
+{
+ void *mailbox;
+ int err;
+ u8 status;
+
+ might_sleep();
+
+ mailbox = kmalloc(sizeof (struct mthca_cq_context) + MTHCA_CMD_MAILBOX_EXTRA,
+ GFP_KERNEL);
+ if (!mailbox) {
+ mthca_warn(dev, "No memory for mailbox to free CQ.\n");
+ return;
+ }
+
+ err = mthca_HW2SW_CQ(dev, MAILBOX_ALIGN(mailbox), cq->cqn, &status);
+ if (err)
+ mthca_warn(dev, "HW2SW_CQ failed (%d)\n", err);
+ else if (status)
+ mthca_warn(dev, "HW2SW_CQ returned status 0x%02x\n",
+ status);
+
+ if (0) {
+ u32 *ctx = MAILBOX_ALIGN(mailbox);
+ int j;
+
+ printk(KERN_ERR "context for CQN %x\n", cq->cqn);
+ for (j = 0; j < 16; ++j)
+ printk(KERN_ERR "[%2x] %08x\n", j * 4, be32_to_cpu(ctx[j]));
+ }
+
+ spin_lock_irq(&dev->cq_table.lock);
+ mthca_array_clear(&dev->cq_table.cq,
+ cq->cqn & (dev->limits.num_cqs - 1));
+ spin_unlock_irq(&dev->cq_table.lock);
+
+ atomic_dec(&cq->refcount);
+ wait_event(cq->wait, !atomic_read(&cq->refcount));
+
+ mthca_free_mr(dev, &cq->mr);
+
+ if (cq->is_direct)
+ pci_free_consistent(dev->pdev,
+ cq->ibcq.cqe * MTHCA_CQ_ENTRY_SIZE,
+ cq->queue.direct.buf,
+ pci_unmap_addr(&cq->queue.direct,
+ mapping));
+ else {
+ int i;
+
+ for (i = 0;
+ i < (cq->ibcq.cqe * MTHCA_CQ_ENTRY_SIZE + PAGE_SIZE - 1) /
+ PAGE_SIZE;
+ ++i)
+ pci_free_consistent(dev->pdev, PAGE_SIZE,
+ cq->queue.page_list[i].buf,
+ pci_unmap_addr(&cq->queue.page_list[i],
+ mapping));
+
+ kfree(cq->queue.page_list);
+ }
+
+ mthca_free(&dev->cq_table.alloc, cq->cqn);
+ kfree(mailbox);
+}
+
+int __devinit mthca_init_cq_table(struct mthca_dev *dev)
+{
+ int err;
+
+ spin_lock_init(&dev->cq_table.lock);
+
+ err = mthca_alloc_init(&dev->cq_table.alloc,
+ dev->limits.num_cqs,
+ (1 << 24) - 1,
+ dev->limits.reserved_cqs);
+ if (err)
+ return err;
+
+ err = mthca_array_init(&dev->cq_table.cq,
+ dev->limits.num_cqs);
+ if (err)
+ mthca_alloc_cleanup(&dev->cq_table.alloc);
+
+ return err;
+}
+
+void __devexit mthca_cleanup_cq_table(struct mthca_dev *dev)
+{
+ mthca_array_cleanup(&dev->cq_table.cq, dev->limits.num_cqs);
+ mthca_alloc_cleanup(&dev->cq_table.alloc);
+}
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_qp.c 2004-12-13 09:44:45.916960983 -0800
@@ -0,0 +1,1479 @@
+/*
+ * 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 at
+ * <http://www.fsf.org/copyleft/gpl.html>, or the OpenIB.org BSD
+ * license, available in the LICENSE.TXT file accompanying this
+ * software. These details are also available at
+ * <http://openib.org/license.html>.
+ *
+ * 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.
+ *
+ * Copyright (c) 2004 Topspin Communications. All rights reserved.
+ *
+ * $Id: mthca_qp.c 1324 2004-12-13 17:55:08Z roland $
+ */
+
+#include <linux/init.h>
+
+#include <ib_verbs.h>
+#include <ib_cache.h>
+#include <ib_pack.h>
+
+#include "mthca_dev.h"
+#include "mthca_cmd.h"
+
+enum {
+ MTHCA_MAX_DIRECT_QP_SIZE = 4 * PAGE_SIZE,
+ MTHCA_ACK_REQ_FREQ = 10,
+ MTHCA_FLIGHT_LIMIT = 9,
+ MTHCA_UD_HEADER_SIZE = 72 /* largest UD header possible */
+};
+
+enum {
+ MTHCA_QP_STATE_RST = 0,
+ MTHCA_QP_STATE_INIT = 1,
+ MTHCA_QP_STATE_RTR = 2,
+ MTHCA_QP_STATE_RTS = 3,
+ MTHCA_QP_STATE_SQE = 4,
+ MTHCA_QP_STATE_SQD = 5,
+ MTHCA_QP_STATE_ERR = 6,
+ MTHCA_QP_STATE_DRAINING = 7
+};
+
+enum {
+ MTHCA_QP_ST_RC = 0x0,
+ MTHCA_QP_ST_UC = 0x1,
+ MTHCA_QP_ST_RD = 0x2,
+ MTHCA_QP_ST_UD = 0x3,
+ MTHCA_QP_ST_MLX = 0x7
+};
+
+enum {
+ MTHCA_QP_PM_MIGRATED = 0x3,
+ MTHCA_QP_PM_ARMED = 0x0,
+ MTHCA_QP_PM_REARM = 0x1
+};
+
+enum {
+ /* qp_context flags */
+ MTHCA_QP_BIT_DE = 1 << 8,
+ /* params1 */
+ MTHCA_QP_BIT_SRE = 1 << 15,
+ MTHCA_QP_BIT_SWE = 1 << 14,
+ MTHCA_QP_BIT_SAE = 1 << 13,
+ MTHCA_QP_BIT_SIC = 1 << 4,
+ MTHCA_QP_BIT_SSC = 1 << 3,
+ /* params2 */
+ MTHCA_QP_BIT_RRE = 1 << 15,
+ MTHCA_QP_BIT_RWE = 1 << 14,
+ MTHCA_QP_BIT_RAE = 1 << 13,
+ MTHCA_QP_BIT_RIC = 1 << 4,
+ MTHCA_QP_BIT_RSC = 1 << 3
+};
+
+struct mthca_qp_path {
+ u32 port_pkey;
+ u8 rnr_retry;
+ u8 g_mylmc;
+ u16 rlid;
+ u8 ackto;
+ u8 mgid_index;
+ u8 static_rate;
+ u8 hop_limit;
+ u32 sl_tclass_flowlabel;
+ u8 rgid[16];
+} __attribute__((packed));
+
+struct mthca_qp_context {
+ u32 flags;
+ u32 sched_queue;
+ u32 mtu_msgmax;
+ u32 usr_page;
+ u32 local_qpn;
+ u32 remote_qpn;
+ u32 reserved1[2];
+ struct mthca_qp_path pri_path;
+ struct mthca_qp_path alt_path;
+ u32 rdd;
+ u32 pd;
+ u32 wqe_base;
+ u32 wqe_lkey;
+ u32 params1;
+ u32 reserved2;
+ u32 next_send_psn;
+ u32 cqn_snd;
+ u32 next_snd_wqe[2];
+ u32 last_acked_psn;
+ u32 ssn;
+ u32 params2;
+ u32 rnr_nextrecvpsn;
+ u32 ra_buff_indx;
+ u32 cqn_rcv;
+ u32 next_rcv_wqe[2];
+ u32 qkey;
+ u32 srqn;
+ u32 rmsn;
+ u32 reserved3[19];
+} __attribute__((packed));
+
+struct mthca_qp_param {
+ u32 opt_param_mask;
+ u32 reserved1;
+ struct mthca_qp_context context;
+ u32 reserved2[62];
+} __attribute__((packed));
+
+enum {
+ MTHCA_QP_OPTPAR_ALT_ADDR_PATH = 1 << 0,
+ MTHCA_QP_OPTPAR_RRE = 1 << 1,
+ MTHCA_QP_OPTPAR_RAE = 1 << 2,
+ MTHCA_QP_OPTPAR_REW = 1 << 3,
+ MTHCA_QP_OPTPAR_PKEY_INDEX = 1 << 4,
+ MTHCA_QP_OPTPAR_Q_KEY = 1 << 5,
+ MTHCA_QP_OPTPAR_RNR_TIMEOUT = 1 << 6,
+ MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH = 1 << 7,
+ MTHCA_QP_OPTPAR_SRA_MAX = 1 << 8,
+ MTHCA_QP_OPTPAR_RRA_MAX = 1 << 9,
+ MTHCA_QP_OPTPAR_PM_STATE = 1 << 10,
+ MTHCA_QP_OPTPAR_PORT_NUM = 1 << 11,
+ MTHCA_QP_OPTPAR_RETRY_COUNT = 1 << 12,
+ MTHCA_QP_OPTPAR_ALT_RNR_RETRY = 1 << 13,
+ MTHCA_QP_OPTPAR_ACK_TIMEOUT = 1 << 14,
+ MTHCA_QP_OPTPAR_RNR_RETRY = 1 << 15,
+ MTHCA_QP_OPTPAR_SCHED_QUEUE = 1 << 16
+};
+
+enum {
+ MTHCA_OPCODE_NOP = 0x00,
+ MTHCA_OPCODE_RDMA_WRITE = 0x08,
+ MTHCA_OPCODE_RDMA_WRITE_IMM = 0x09,
+ MTHCA_OPCODE_SEND = 0x0a,
+ MTHCA_OPCODE_SEND_IMM = 0x0b,
+ MTHCA_OPCODE_RDMA_READ = 0x10,
+ MTHCA_OPCODE_ATOMIC_CS = 0x11,
+ MTHCA_OPCODE_ATOMIC_FA = 0x12,
+ MTHCA_OPCODE_BIND_MW = 0x18,
+ MTHCA_OPCODE_INVALID = 0xff
+};
+
+enum {
+ MTHCA_NEXT_DBD = 1 << 7,
+ MTHCA_NEXT_FENCE = 1 << 6,
+ MTHCA_NEXT_CQ_UPDATE = 1 << 3,
+ MTHCA_NEXT_EVENT_GEN = 1 << 2,
+ MTHCA_NEXT_SOLICIT = 1 << 1,
+
+ MTHCA_MLX_VL15 = 1 << 17,
+ MTHCA_MLX_SLR = 1 << 16
+};
+
+struct mthca_next_seg {
+ u32 nda_op; /* [31:6] next WQE [4:0] next opcode */
+ u32 ee_nds; /* [31:8] next EE [7] DBD [6] F [5:0] next WQE size */
+ u32 flags; /* [3] CQ [2] Event [1] Solicit */
+ u32 imm; /* immediate data */
+} __attribute__((packed));
+
+struct mthca_ud_seg {
+ u32 reserved1;
+ u32 lkey;
+ u64 av_addr;
+ u32 reserved2[4];
+ u32 dqpn;
+ u32 qkey;
+ u32 reserved3[2];
+} __attribute__((packed));
+
+struct mthca_bind_seg {
+ u32 flags; /* [31] Atomic [30] rem write [29] rem read */
+ u32 reserved;
+ u32 new_rkey;
+ u32 lkey;
+ u64 addr;
+ u64 length;
+} __attribute__((packed));
+
+struct mthca_raddr_seg {
+ u64 raddr;
+ u32 rkey;
+ u32 reserved;
+} __attribute__((packed));
+
+struct mthca_atomic_seg {
+ u64 swap_add;
+ u64 compare;
+} __attribute__((packed));
+
+struct mthca_data_seg {
+ u32 byte_count;
+ u32 lkey;
+ u64 addr;
+} __attribute__((packed));
+
+struct mthca_mlx_seg {
+ u32 nda_op;
+ u32 nds;
+ u32 flags; /* [17] VL15 [16] SLR [14:12] static rate
+ [11:8] SL [3] C [2] E */
+ u16 rlid;
+ u16 vcrc;
+} __attribute__((packed));
+
+static int is_sqp(struct mthca_dev *dev, struct mthca_qp *qp)
+{
+ return qp->qpn >= dev->qp_table.sqp_start &&
+ qp->qpn <= dev->qp_table.sqp_start + 3;
+}
+
+static int is_qp0(struct mthca_dev *dev, struct mthca_qp *qp)
+{
+ return qp->qpn >= dev->qp_table.sqp_start &&
+ qp->qpn <= dev->qp_table.sqp_start + 1;
+}
+
+static void *get_recv_wqe(struct mthca_qp *qp, int n)
+{
+ if (qp->is_direct)
+ return qp->queue.direct.buf + (n << qp->rq.wqe_shift);
+ else
+ return qp->queue.page_list[(n << qp->rq.wqe_shift) >> PAGE_SHIFT].buf +
+ ((n << qp->rq.wqe_shift) & (PAGE_SIZE - 1));
+}
+
+static void *get_send_wqe(struct mthca_qp *qp, int n)
+{
+ if (qp->is_direct)
+ return qp->queue.direct.buf + qp->send_wqe_offset +
+ (n << qp->sq.wqe_shift);
+ else
+ return qp->queue.page_list[(qp->send_wqe_offset +
+ (n << qp->sq.wqe_shift)) >>
+ PAGE_SHIFT].buf +
+ ((qp->send_wqe_offset + (n << qp->sq.wqe_shift)) &
+ (PAGE_SIZE - 1));
+}
+
+void mthca_qp_event(struct mthca_dev *dev, u32 qpn,
+ enum ib_event_type event_type)
+{
+ struct mthca_qp *qp;
+ struct ib_event event;
+
+ spin_lock(&dev->qp_table.lock);
+ qp = mthca_array_get(&dev->qp_table.qp, qpn & (dev->limits.num_qps - 1));
+ if (qp)
+ atomic_inc(&qp->refcount);
+ spin_unlock(&dev->qp_table.lock);
+
+ if (!qp) {
+ mthca_warn(dev, "Async event for bogus QP %08x\n", qpn);
+ return;
+ }
+
+ event.device = &dev->ib_dev;
+ event.event = event_type;
+ event.element.qp = &qp->ibqp;
+ if (qp->ibqp.event_handler)
+ qp->ibqp.event_handler(&event, qp->ibqp.qp_context);
+
+ if (atomic_dec_and_test(&qp->refcount))
+ wake_up(&qp->wait);
+}
+
+static int to_mthca_state(enum ib_qp_state ib_state)
+{
+ switch (ib_state) {
+ case IB_QPS_RESET: return MTHCA_QP_STATE_RST;
+ case IB_QPS_INIT: return MTHCA_QP_STATE_INIT;
+ case IB_QPS_RTR: return MTHCA_QP_STATE_RTR;
+ case IB_QPS_RTS: return MTHCA_QP_STATE_RTS;
+ case IB_QPS_SQD: return MTHCA_QP_STATE_SQD;
+ case IB_QPS_SQE: return MTHCA_QP_STATE_SQE;
+ case IB_QPS_ERR: return MTHCA_QP_STATE_ERR;
+ default: return -1;
+ }
+}
+
+enum { RC, UC, UD, RD, RDEE, MLX, NUM_TRANS };
+
+static int to_mthca_st(int transport)
+{
+ switch (transport) {
+ case RC: return MTHCA_QP_ST_RC;
+ case UC: return MTHCA_QP_ST_UC;
+ case UD: return MTHCA_QP_ST_UD;
+ case RD: return MTHCA_QP_ST_RD;
+ case MLX: return MTHCA_QP_ST_MLX;
+ default: return -1;
+ }
+}
+
+static const struct {
+ int trans;
+ u32 req_param[NUM_TRANS];
+ u32 opt_param[NUM_TRANS];
+} state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
+ [IB_QPS_RESET] = {
+ [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
+ [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
+ [IB_QPS_INIT] = {
+ .trans = MTHCA_TRANS_RST2INIT,
+ .req_param = {
+ [UD] = (IB_QP_PKEY_INDEX |
+ IB_QP_PORT |
+ IB_QP_QKEY),
+ [RC] = (IB_QP_PKEY_INDEX |
+ IB_QP_PORT |
+ IB_QP_ACCESS_FLAGS),
+ [MLX] = (IB_QP_PKEY_INDEX |
+ IB_QP_QKEY),
+ },
+ /* bug-for-bug compatibility with VAPI: */
+ .opt_param = {
+ [MLX] = IB_QP_PORT
+ }
+ },
+ },
+ [IB_QPS_INIT] = {
+ [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
+ [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
+ [IB_QPS_INIT] = {
+ .trans = MTHCA_TRANS_INIT2INIT,
+ .opt_param = {
+ [UD] = (IB_QP_PKEY_INDEX |
+ IB_QP_PORT |
+ IB_QP_QKEY),
+ [RC] = (IB_QP_PKEY_INDEX |
+ IB_QP_PORT |
+ IB_QP_ACCESS_FLAGS),
+ [MLX] = (IB_QP_PKEY_INDEX |
+ IB_QP_QKEY),
+ }
+ },
+ [IB_QPS_RTR] = {
+ .trans = MTHCA_TRANS_INIT2RTR,
+ .req_param = {
+ [RC] = (IB_QP_AV |
+ IB_QP_PATH_MTU |
+ IB_QP_DEST_QPN |
+ IB_QP_RQ_PSN |
+ IB_QP_MAX_DEST_RD_ATOMIC |
+ IB_QP_MIN_RNR_TIMER),
+ },
+ .opt_param = {
+ [UD] = (IB_QP_PKEY_INDEX |
+ IB_QP_QKEY),
+ [RC] = (IB_QP_ALT_PATH |
+ IB_QP_ACCESS_FLAGS |
+ IB_QP_PKEY_INDEX),
+ [MLX] = (IB_QP_PKEY_INDEX |
+ IB_QP_QKEY),
+ }
+ }
+ },
+ [IB_QPS_RTR] = {
+ [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
+ [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
+ [IB_QPS_RTS] = {
+ .trans = MTHCA_TRANS_RTR2RTS,
+ .req_param = {
+ [UD] = IB_QP_SQ_PSN,
+ [RC] = (IB_QP_TIMEOUT |
+ IB_QP_RETRY_CNT |
+ IB_QP_RNR_RETRY |
+ IB_QP_SQ_PSN |
+ IB_QP_MAX_QP_RD_ATOMIC),
+ [MLX] = IB_QP_SQ_PSN,
+ },
+ .opt_param = {
+ [UD] = (IB_QP_CUR_STATE |
+ IB_QP_QKEY),
+ [RC] = (IB_QP_CUR_STATE |
+ IB_QP_ALT_PATH |
+ IB_QP_ACCESS_FLAGS |
+ IB_QP_PKEY_INDEX |
+ IB_QP_MIN_RNR_TIMER |
+ IB_QP_PATH_MIG_STATE),
+ [MLX] = (IB_QP_CUR_STATE |
+ IB_QP_QKEY),
+ }
+ }
+ },
+ [IB_QPS_RTS] = {
+ [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
+ [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
+ [IB_QPS_RTS] = {
+ .trans = MTHCA_TRANS_RTS2RTS,
+ .opt_param = {
+ [UD] = (IB_QP_CUR_STATE |
+ IB_QP_QKEY),
+ [RC] = (IB_QP_ACCESS_FLAGS |
+ IB_QP_ALT_PATH |
+ IB_QP_PATH_MIG_STATE |
+ IB_QP_MIN_RNR_TIMER),
+ [MLX] = (IB_QP_CUR_STATE |
+ IB_QP_QKEY),
+ }
+ },
+ [IB_QPS_SQD] = {
+ .trans = MTHCA_TRANS_RTS2SQD,
+ },
+ },
+ [IB_QPS_SQD] = {
+ [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
+ [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
+ [IB_QPS_RTS] = {
+ .trans = MTHCA_TRANS_SQD2RTS,
+ .opt_param = {
+ [UD] = (IB_QP_CUR_STATE |
+ IB_QP_QKEY),
+ [RC] = (IB_QP_CUR_STATE |
+ IB_QP_ALT_PATH |
+ IB_QP_ACCESS_FLAGS |
+ IB_QP_MIN_RNR_TIMER |
+ IB_QP_PATH_MIG_STATE),
+ [MLX] = (IB_QP_CUR_STATE |
+ IB_QP_QKEY),
+ }
+ },
+ [IB_QPS_SQD] = {
+ .trans = MTHCA_TRANS_SQD2SQD,
+ .opt_param = {
+ [UD] = (IB_QP_PKEY_INDEX |
+ IB_QP_QKEY),
+ [RC] = (IB_QP_AV |
+ IB_QP_TIMEOUT |
+ IB_QP_RETRY_CNT |
+ IB_QP_RNR_RETRY |
+ IB_QP_MAX_QP_RD_ATOMIC |
+ IB_QP_MAX_DEST_RD_ATOMIC |
+ IB_QP_CUR_STATE |
+ IB_QP_ALT_PATH |
+ IB_QP_ACCESS_FLAGS |
+ IB_QP_PKEY_INDEX |
+ IB_QP_MIN_RNR_TIMER |
+ IB_QP_PATH_MIG_STATE),
+ [MLX] = (IB_QP_PKEY_INDEX |
+ IB_QP_QKEY),
+ }
+ }
+ },
+ [IB_QPS_SQE] = {
+ [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
+ [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR },
+ [IB_QPS_RTS] = {
+ .trans = MTHCA_TRANS_SQERR2RTS,
+ .opt_param = {
+ [UD] = (IB_QP_CUR_STATE |
+ IB_QP_QKEY),
+ [RC] = (IB_QP_CUR_STATE |
+ IB_QP_MIN_RNR_TIMER),
+ [MLX] = (IB_QP_CUR_STATE |
+ IB_QP_QKEY),
+ }
+ }
+ },
+ [IB_QPS_ERR] = {
+ [IB_QPS_RESET] = { .trans = MTHCA_TRANS_ANY2RST },
+ [IB_QPS_ERR] = { .trans = MTHCA_TRANS_ANY2ERR }
+ }
+};
+
+static void store_attrs(struct mthca_sqp *sqp, struct ib_qp_attr *attr,
+ int attr_mask)
+{
+ if (attr_mask & IB_QP_PKEY_INDEX)
+ sqp->pkey_index = attr->pkey_index;
+ if (attr_mask & IB_QP_QKEY)
+ sqp->qkey = attr->qkey;
+ if (attr_mask & IB_QP_SQ_PSN)
+ sqp->send_psn = attr->sq_psn;
+}
+
+static void init_port(struct mthca_dev *dev, int port)
+{
+ int err;
+ u8 status;
+ struct mthca_init_ib_param param;
+
+ memset(&param, 0, sizeof param);
+
+ param.enable_1x = 1;
+ param.enable_4x = 1;
+ param.vl_cap = dev->limits.vl_cap;
+ param.mtu_cap = dev->limits.mtu_cap;
+ param.gid_cap = dev->limits.gid_table_len;
+ param.pkey_cap = dev->limits.pkey_table_len;
+
+ err = mthca_INIT_IB(dev, &param, port, &status);
+ if (err)
+ mthca_warn(dev, "INIT_IB failed, return code %d.\n", err);
+ if (status)
+ mthca_warn(dev, "INIT_IB returned status %02x.\n", status);
+}
+
+int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask)
+{
+ struct mthca_dev *dev = to_mdev(ibqp->device);
+ struct mthca_qp *qp = to_mqp(ibqp);
+ enum ib_qp_state cur_state, new_state;
+ void *mailbox = NULL;
+ struct mthca_qp_param *qp_param;
+ struct mthca_qp_context *qp_context;
+ u32 req_param, opt_param;
+ u8 status;
+ int err;
+
+ if (attr_mask & IB_QP_CUR_STATE) {
+ if (attr->cur_qp_state != IB_QPS_RTR &&
+ attr->cur_qp_state != IB_QPS_RTS &&
+ attr->cur_qp_state != IB_QPS_SQD &&
+ attr->cur_qp_state != IB_QPS_SQE)
+ return -EINVAL;
+ else
+ cur_state = attr->cur_qp_state;
+ } else {
+ spin_lock_irq(&qp->lock);
+ cur_state = qp->state;
+ spin_unlock_irq(&qp->lock);
+ }
+
+ if (attr_mask & IB_QP_STATE) {
+ if (attr->qp_state < 0 || attr->qp_state > IB_QPS_ERR)
+ return -EINVAL;
+ new_state = attr->qp_state;
+ } else
+ new_state = cur_state;
+
+ if (state_table[cur_state][new_state].trans == MTHCA_TRANS_INVALID) {
+ mthca_dbg(dev, "Illegal QP transition "
+ "%d->%d\n", cur_state, new_state);
+ return -EINVAL;
+ }
+
+ req_param = state_table[cur_state][new_state].req_param[qp->transport];
+ opt_param = state_table[cur_state][new_state].opt_param[qp->transport];
+
+ if ((req_param & attr_mask) != req_param) {
+ mthca_dbg(dev, "QP transition "
+ "%d->%d missing req attr 0x%08x\n",
+ cur_state, new_state,
+ req_param & ~attr_mask);
+ return -EINVAL;
+ }
+
+ if (attr_mask & ~(req_param | opt_param | IB_QP_STATE)) {
+ mthca_dbg(dev, "QP transition (transport %d) "
+ "%d->%d has extra attr 0x%08x\n",
+ qp->transport,
+ cur_state, new_state,
+ attr_mask & ~(req_param | opt_param |
+ IB_QP_STATE));
+ return -EINVAL;
+ }
+
+ mailbox = kmalloc(sizeof (*qp_param) + MTHCA_CMD_MAILBOX_EXTRA, GFP_KERNEL);
+ if (!mailbox)
+ return -ENOMEM;
+ qp_param = MAILBOX_ALIGN(mailbox);
+ qp_context = &qp_param->context;
+ memset(qp_param, 0, sizeof *qp_param);
+
+ qp_context->flags = cpu_to_be32((to_mthca_state(new_state) << 28) |
+ (to_mthca_st(qp->transport) << 16));
+ qp_context->flags |= cpu_to_be32(MTHCA_QP_BIT_DE);
+ if (!(attr_mask & IB_QP_PATH_MIG_STATE))
+ qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_MIGRATED << 11);
+ else {
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PM_STATE);
+ switch (attr->path_mig_state) {
+ case IB_MIG_MIGRATED:
+ qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_MIGRATED << 11);
+ break;
+ case IB_MIG_REARM:
+ qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_REARM << 11);
+ break;
+ case IB_MIG_ARMED:
+ qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_ARMED << 11);
+ break;
+ }
+ }
+ /* leave sched_queue as 0 */
+ if (qp->transport == MLX || qp->transport == UD)
+ qp_context->mtu_msgmax = cpu_to_be32((IB_MTU_2048 << 29) |
+ (11 << 24));
+ else if (attr_mask & IB_QP_PATH_MTU) {
+ qp_context->mtu_msgmax = cpu_to_be32((attr->path_mtu << 29) |
+ (31 << 24));
+ }
+ qp_context->usr_page = cpu_to_be32(MTHCA_KAR_PAGE);
+ qp_context->local_qpn = cpu_to_be32(qp->qpn);
+ if (attr_mask & IB_QP_DEST_QPN) {
+ qp_context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
+ }
+
+ if (qp->transport == MLX)
+ qp_context->pri_path.port_pkey |=
+ cpu_to_be32(to_msqp(qp)->port << 24);
+ else {
+ if (attr_mask & IB_QP_PORT) {
+ qp_context->pri_path.port_pkey |=
+ cpu_to_be32(attr->port_num << 24);
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PORT_NUM);
+ }
+ }
+
+ if (attr_mask & IB_QP_PKEY_INDEX) {
+ qp_context->pri_path.port_pkey |=
+ cpu_to_be32(attr->pkey_index);
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PKEY_INDEX);
+ }
+
+ if (attr_mask & IB_QP_RNR_RETRY) {
+ qp_context->pri_path.rnr_retry = attr->rnr_retry << 5;
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_RETRY);
+ }
+
+ if (attr_mask & IB_QP_AV) {
+ qp_context->pri_path.g_mylmc = attr->ah_attr.src_path_bits & 0x7f;
+ qp_context->pri_path.rlid = cpu_to_be16(attr->ah_attr.dlid);
+ qp_context->pri_path.static_rate = (!!attr->ah_attr.static_rate) << 3;
+ if (attr->ah_attr.ah_flags & IB_AH_GRH) {
+ qp_context->pri_path.g_mylmc |= 1 << 7;
+ qp_context->pri_path.mgid_index = attr->ah_attr.grh.sgid_index;
+ qp_context->pri_path.hop_limit = attr->ah_attr.grh.hop_limit;
+ qp_context->pri_path.sl_tclass_flowlabel =
+ cpu_to_be32((attr->ah_attr.sl << 28) |
+ (attr->ah_attr.grh.traffic_class << 20) |
+ (attr->ah_attr.grh.flow_label));
+ memcpy(qp_context->pri_path.rgid,
+ attr->ah_attr.grh.dgid.raw, 16);
+ } else {
+ qp_context->pri_path.sl_tclass_flowlabel =
+ cpu_to_be32(attr->ah_attr.sl << 28);
+ }
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH);
+ }
+
+ if (attr_mask & IB_QP_TIMEOUT) {
+ qp_context->pri_path.ackto = attr->timeout;
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ACK_TIMEOUT);
+ }
+
+ /* XXX alt_path */
+
+ /* leave rdd as 0 */
+ qp_context->pd = cpu_to_be32(to_mpd(ibqp->pd)->pd_num);
+ /* leave wqe_base as 0 (we always create an MR based at 0 for WQs) */
+ qp_context->wqe_lkey = cpu_to_be32(qp->mr.ibmr.lkey);
+ qp_context->params1 = cpu_to_be32((MTHCA_ACK_REQ_FREQ << 28) |
+ (MTHCA_FLIGHT_LIMIT << 24) |
+ MTHCA_QP_BIT_SRE |
+ MTHCA_QP_BIT_SWE |
+ MTHCA_QP_BIT_SAE);
+ if (qp->sq.policy == IB_SIGNAL_ALL_WR)
+ qp_context->params1 |= cpu_to_be32(MTHCA_QP_BIT_SSC);
+ if (attr_mask & IB_QP_RETRY_CNT) {
+ qp_context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RETRY_COUNT);
+ }
+
+ /* XXX initiator resources */
+ if (attr_mask & IB_QP_SQ_PSN)
+ qp_context->next_send_psn = cpu_to_be32(attr->sq_psn);
+ qp_context->cqn_snd = cpu_to_be32(to_mcq(ibqp->send_cq)->cqn);
+
+ /* XXX RDMA/atomic enable, responder resources */
+
+ if (qp->rq.policy == IB_SIGNAL_ALL_WR)
+ qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RSC);
+ if (attr_mask & IB_QP_MIN_RNR_TIMER) {
+ qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_TIMEOUT);
+ }
+ if (attr_mask & IB_QP_RQ_PSN)
+ qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
+
+ /* XXX ra_buff_indx */
+
+ qp_context->cqn_rcv = cpu_to_be32(to_mcq(ibqp->recv_cq)->cqn);
+
+ if (attr_mask & IB_QP_QKEY) {
+ qp_context->qkey = cpu_to_be32(attr->qkey);
+ qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_Q_KEY);
+ }
+
+ err = mthca_MODIFY_QP(dev, state_table[cur_state][new_state].trans,
+ qp->qpn, 0, qp_param, 0, &status);
+ if (status) {
+ mthca_warn(dev, "modify QP %d returned status %02x.\n",
+ state_table[cur_state][new_state].trans, status);
+ err = -EINVAL;
+ }
+
+ if (!err) {
+ spin_lock_irq(&qp->lock);
+ /* XXX deal with async transitions to ERROR */
+ qp->state = new_state;
+ spin_unlock_irq(&qp->lock);
+ }
+
+ kfree(mailbox);
+
+ if (is_sqp(dev, qp))
+ store_attrs(to_msqp(qp), attr, attr_mask);
+
+ /*
+ * If we are moving QP0 to RTR, bring the IB link up; if we
+ * are moving QP0 to RESET or ERROR, bring the link back down.
+ */
+ if (is_qp0(dev, qp)) {
+ if (cur_state != IB_QPS_RTR &&
+ new_state == IB_QPS_RTR)
+ init_port(dev, to_msqp(qp)->port);
+
+ if (cur_state != IB_QPS_RESET &&
+ cur_state != IB_QPS_ERR &&
+ (new_state == IB_QPS_RESET ||
+ new_state == IB_QPS_ERR))
+ mthca_CLOSE_IB(dev, to_msqp(qp)->port, &status);
+ }
+
+ return err;
+}
+
+/*
+ * Allocate and register buffer for WQEs. qp->rq.max, sq.max,
+ * rq.max_gs and sq.max_gs must all be assigned.
+ * mthca_alloc_wqe_buf will calculate rq.wqe_shift and
+ * sq.wqe_shift (as well as send_wqe_offset, is_direct, and
+ * queue)
+ */
+static int mthca_alloc_wqe_buf(struct mthca_dev *dev,
+ struct mthca_pd *pd,
+ struct mthca_qp *qp)
+{
+ int size;
+ int i;
+ int npages, shift;
+ dma_addr_t t;
+ u64 *dma_list = NULL;
+ int err = -ENOMEM;
+
+ size = sizeof (struct mthca_next_seg) +
+ qp->rq.max_gs * sizeof (struct mthca_data_seg);
+
+ for (qp->rq.wqe_shift = 6; 1 << qp->rq.wqe_shift < size;
+ qp->rq.wqe_shift++)
+ ; /* nothing */
+
+ size = sizeof (struct mthca_next_seg) +
+ qp->sq.max_gs * sizeof (struct mthca_data_seg);
+ if (qp->transport == MLX)
+ size += 2 * sizeof (struct mthca_data_seg);
+ else if (qp->transport == UD)
+ size += sizeof (struct mthca_ud_seg);
+ else /* bind seg is as big as atomic + raddr segs */
+ size += sizeof (struct mthca_bind_seg);
+
+ for (qp->sq.wqe_shift = 6; 1 << qp->sq.wqe_shift < size;
+ qp->sq.wqe_shift++)
+ ; /* nothing */
+
+ qp->send_wqe_offset = ALIGN(qp->rq.max << qp->rq.wqe_shift,
+ 1 << qp->sq.wqe_shift);
+ size = PAGE_ALIGN(qp->send_wqe_offset +
+ (qp->sq.max << qp->sq.wqe_shift));
+
+ qp->wrid = kmalloc((qp->rq.max + qp->sq.max) * sizeof (u64),
+ GFP_KERNEL);
+ if (!qp->wrid)
+ goto err_out;
+
+ if (size <= MTHCA_MAX_DIRECT_QP_SIZE) {
+ qp->is_direct = 1;
+ npages = 1;
+ shift = get_order(size) + PAGE_SHIFT;
+
+ if (0)
+ mthca_dbg(dev, "Creating direct QP of size %d (shift %d)\n",
+ size, shift);
+
+ qp->queue.direct.buf = pci_alloc_consistent(dev->pdev, size, &t);
+ if (!qp->queue.direct.buf)
+ goto err_out;
+
+ pci_unmap_addr_set(&qp->queue.direct, mapping, t);
+
+ memset(qp->queue.direct.buf, 0, size);
+
+ while (t & ((1 << shift) - 1)) {
+ --shift;
+ npages *= 2;
+ }
+
+ dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
+ if (!dma_list)
+ goto err_out_free;
+
+ for (i = 0; i < npages; ++i)
+ dma_list[i] = t + i * (1 << shift);
+ } else {
+ qp->is_direct = 0;
+ npages = size / PAGE_SIZE;
+ shift = PAGE_SHIFT;
+
+ if (0)
+ mthca_dbg(dev, "Creating indirect QP with %d pages\n", npages);
+
+ dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
+ if (!dma_list)
+ goto err_out;
+
+ qp->queue.page_list = kmalloc(npages *
+ sizeof *qp->queue.page_list,
+ GFP_KERNEL);
+ if (!qp->queue.page_list)
+ goto err_out;
+
+ for (i = 0; i < npages; ++i) {
+ qp->queue.page_list[i].buf =
+ pci_alloc_consistent(dev->pdev, PAGE_SIZE, &t);
+ if (!qp->queue.page_list[i].buf)
+ goto err_out_free;
+
+ memset(qp->queue.page_list[i].buf, 0, PAGE_SIZE);
+
+ pci_unmap_addr_set(&qp->queue.page_list[i], mapping, t);
+ dma_list[i] = t;
+ }
+ }
+
+ err = mthca_mr_alloc_phys(dev, pd->pd_num, dma_list, shift,
+ npages, 0, size,
+ MTHCA_MPT_FLAG_LOCAL_WRITE |
+ MTHCA_MPT_FLAG_LOCAL_READ,
+ &qp->mr);
+ if (err)
+ goto err_out_free;
+
+ kfree(dma_list);
+ return 0;
+
+ err_out_free:
+ if (qp->is_direct) {
+ pci_free_consistent(dev->pdev, size,
+ qp->queue.direct.buf,
+ pci_unmap_addr(&qp->queue.direct, mapping));
+ } else
+ for (i = 0; i < npages; ++i) {
+ if (qp->queue.page_list[i].buf)
+ pci_free_consistent(dev->pdev, PAGE_SIZE,
+ qp->queue.page_list[i].buf,
+ pci_unmap_addr(&qp->queue.page_list[i],
+ mapping));
+
+ }
+
+ err_out:
+ kfree(qp->wrid);
+ kfree(dma_list);
+ return err;
+}
+
+static int mthca_alloc_qp_common(struct mthca_dev *dev,
+ struct mthca_pd *pd,
+ struct mthca_cq *send_cq,
+ struct mthca_cq *recv_cq,
+ enum ib_sig_type send_policy,
+ enum ib_sig_type recv_policy,
+ struct mthca_qp *qp)
+{
+ int err;
+
+ spin_lock_init(&qp->lock);
+ atomic_set(&qp->refcount, 1);
+ qp->state = IB_QPS_RESET;
+ qp->sq.policy = send_policy;
+ qp->rq.policy = recv_policy;
+ qp->rq.cur = 0;
+ qp->sq.cur = 0;
+ qp->rq.next = 0;
+ qp->sq.next = 0;
+ qp->rq.last_comp = qp->rq.max - 1;
+ qp->sq.last_comp = qp->sq.max - 1;
+ qp->rq.last = NULL;
+ qp->sq.last = NULL;
+
+ err = mthca_alloc_wqe_buf(dev, pd, qp);
+ return err;
+}
+
+int mthca_alloc_qp(struct mthca_dev *dev,
+ struct mthca_pd *pd,
+ struct mthca_cq *send_cq,
+ struct mthca_cq *recv_cq,
+ enum ib_qp_type type,
+ enum ib_sig_type send_policy,
+ enum ib_sig_type recv_policy,
+ struct mthca_qp *qp)
+{
+ int err;
+
+ switch (type) {
+ case IB_QPT_RC: qp->transport = RC; break;
+ case IB_QPT_UC: qp->transport = UC; break;
+ case IB_QPT_UD: qp->transport = UD; break;
+ default: return -EINVAL;
+ }
+
+ qp->qpn = mthca_alloc(&dev->qp_table.alloc);
+ if (qp->qpn == -1)
+ return -ENOMEM;
+
+ err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq,
+ send_policy, recv_policy, qp);
+ if (err) {
+ mthca_free(&dev->qp_table.alloc, qp->qpn);
+ return err;
+ }
+
+ spin_lock_irq(&dev->qp_table.lock);
+ mthca_array_set(&dev->qp_table.qp,
+ qp->qpn & (dev->limits.num_qps - 1), qp);
+ spin_unlock_irq(&dev->qp_table.lock);
+
+ return 0;
+}
+
+int mthca_alloc_sqp(struct mthca_dev *dev,
+ struct mthca_pd *pd,
+ struct mthca_cq *send_cq,
+ struct mthca_cq *recv_cq,
+ enum ib_sig_type send_policy,
+ enum ib_sig_type recv_policy,
+ int qpn,
+ int port,
+ struct mthca_sqp *sqp)
+{
+ int err = 0;
+ u32 mqpn = qpn * 2 + dev->qp_table.sqp_start + port - 1;
+
+ sqp->header_buf_size = sqp->qp.sq.max * MTHCA_UD_HEADER_SIZE;
+ sqp->header_buf = dma_alloc_coherent(&dev->pdev->dev, sqp->header_buf_size,
+ &sqp->header_dma, GFP_KERNEL);
+ if (!sqp->header_buf)
+ return -ENOMEM;
+
+ spin_lock_irq(&dev->qp_table.lock);
+ if (mthca_array_get(&dev->qp_table.qp, mqpn))
+ err = -EBUSY;
+ else
+ mthca_array_set(&dev->qp_table.qp, mqpn, sqp);
+ spin_unlock_irq(&dev->qp_table.lock);
+
+ if (err)
+ goto err_out;
+
+ sqp->port = port;
+ sqp->qp.qpn = mqpn;
+ sqp->qp.transport = MLX;
+
+ err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq,
+ send_policy, recv_policy,
+ &sqp->qp);
+ if (err)
+ goto err_out_free;
+
+ atomic_inc(&pd->sqp_count);
+
+ return 0;
+
+ err_out_free:
+ spin_lock_irq(&dev->qp_table.lock);
+ mthca_array_clear(&dev->qp_table.qp, mqpn);
+ spin_unlock_irq(&dev->qp_table.lock);
+
+ err_out:
+ dma_free_coherent(&dev->pdev->dev, sqp->header_buf_size,
+ sqp->header_buf, sqp->header_dma);
+
+ return err;
+}
+
+void mthca_free_qp(struct mthca_dev *dev,
+ struct mthca_qp *qp)
+{
+ u8 status;
+ int size;
+ int i;
+
+ spin_lock_irq(&dev->qp_table.lock);
+ mthca_array_clear(&dev->qp_table.qp,
+ qp->qpn & (dev->limits.num_qps - 1));
+ spin_unlock_irq(&dev->qp_table.lock);
+
+ atomic_dec(&qp->refcount);
+ wait_event(qp->wait, !atomic_read(&qp->refcount));
+
+ if (qp->state != IB_QPS_RESET)
+ mthca_MODIFY_QP(dev, MTHCA_TRANS_ANY2RST, qp->qpn, 0, NULL, 0, &status);
+
+ mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq)->cqn, qp->qpn);
+ if (qp->ibqp.send_cq != qp->ibqp.recv_cq)
+ mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq)->cqn, qp->qpn);
+
+ mthca_free_mr(dev, &qp->mr);
+
+ size = PAGE_ALIGN(qp->send_wqe_offset +
+ (qp->sq.max << qp->sq.wqe_shift));
+
+ if (qp->is_direct) {
+ pci_free_consistent(dev->pdev, size,
+ qp->queue.direct.buf,
+ pci_unmap_addr(&qp->queue.direct, mapping));
+ } else {
+ for (i = 0; i < size / PAGE_SIZE; ++i) {
+ pci_free_consistent(dev->pdev, PAGE_SIZE,
+ qp->queue.page_list[i].buf,
+ pci_unmap_addr(&qp->queue.page_list[i],
+ mapping));
+ }
+ }
+
+ kfree(qp->wrid);
+
+ if (is_sqp(dev, qp)) {
+ atomic_dec(&(to_mpd(qp->ibqp.pd)->sqp_count));
+ dma_free_coherent(&dev->pdev->dev,
+ to_msqp(qp)->header_buf_size,
+ to_msqp(qp)->header_buf,
+ to_msqp(qp)->header_dma);
+ }
+ else
+ mthca_free(&dev->qp_table.alloc, qp->qpn);
+}
+
+/* Create UD header for an MLX send and build a data segment for it */
+static int build_mlx_header(struct mthca_dev *dev, struct mthca_sqp *sqp,
+ int ind, struct ib_send_wr *wr,
+ struct mthca_mlx_seg *mlx,
+ struct mthca_data_seg *data)
+{
+ int header_size;
+ int err;
+
+ ib_ud_header_init(256, /* assume a MAD */
+ sqp->ud_header.grh_present,
+ &sqp->ud_header);
+
+ err = mthca_read_ah(dev, to_mah(wr->wr.ud.ah), &sqp->ud_header);
+ if (err)
+ return err;
+ mlx->flags &= ~cpu_to_be32(MTHCA_NEXT_SOLICIT | 1);
+ mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MTHCA_MLX_VL15 : 0) |
+ (sqp->ud_header.lrh.destination_lid == 0xffff ?
+ MTHCA_MLX_SLR : 0) |
+ (sqp->ud_header.lrh.service_level << 8));
+ mlx->rlid = sqp->ud_header.lrh.destination_lid;
+ mlx->vcrc = 0;
+
+ switch (wr->opcode) {
+ case IB_WR_SEND:
+ sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
+ sqp->ud_header.immediate_present = 0;
+ break;
+ case IB_WR_SEND_WITH_IMM:
+ sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
+ sqp->ud_header.immediate_present = 1;
+ sqp->ud_header.immediate_data = wr->imm_data;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
+ if (sqp->ud_header.lrh.destination_lid == 0xffff)
+ sqp->ud_header.lrh.source_lid = 0xffff;
+ sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
+ if (!sqp->qp.ibqp.qp_num)
+ ib_cached_pkey_get(&dev->ib_dev, sqp->port,
+ sqp->pkey_index,
+ &sqp->ud_header.bth.pkey);
+ else
+ ib_cached_pkey_get(&dev->ib_dev, sqp->port,
+ wr->wr.ud.pkey_index,
+ &sqp->ud_header.bth.pkey);
+ cpu_to_be16s(&sqp->ud_header.bth.pkey);
+ sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
+ sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
+ sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
+ sqp->qkey : wr->wr.ud.remote_qkey);
+ sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
+
+ header_size = ib_ud_header_pack(&sqp->ud_header,
+ sqp->header_buf +
+ ind * MTHCA_UD_HEADER_SIZE);
+
+ data->byte_count = cpu_to_be32(header_size);
+ data->lkey = cpu_to_be32(to_mpd(sqp->qp.ibqp.pd)->ntmr.ibmr.lkey);
+ data->addr = cpu_to_be64(sqp->header_dma +
+ ind * MTHCA_UD_HEADER_SIZE);
+
+ return 0;
+}
+
+int mthca_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
+{
+ struct mthca_dev *dev = to_mdev(ibqp->device);
+ struct mthca_qp *qp = to_mqp(ibqp);
+ void *wqe;
+ void *prev_wqe;
+ unsigned long flags;
+ int err = 0;
+ int nreq;
+ int i;
+ int size;
+ int size0 = 0;
+ u32 f0 = 0;
+ int ind;
+ u8 op0 = 0;
+
+ static const u8 opcode[] = {
+ [IB_WR_SEND] = MTHCA_OPCODE_SEND,
+ [IB_WR_SEND_WITH_IMM] = MTHCA_OPCODE_SEND_IMM,
+ [IB_WR_RDMA_WRITE] = MTHCA_OPCODE_RDMA_WRITE,
+ [IB_WR_RDMA_WRITE_WITH_IMM] = MTHCA_OPCODE_RDMA_WRITE_IMM,
+ [IB_WR_RDMA_READ] = MTHCA_OPCODE_RDMA_READ,
+ [IB_WR_ATOMIC_CMP_AND_SWP] = MTHCA_OPCODE_ATOMIC_CS,
+ [IB_WR_ATOMIC_FETCH_AND_ADD] = MTHCA_OPCODE_ATOMIC_FA,
+ };
+
+ spin_lock_irqsave(&qp->lock, flags);
+
+ /* XXX check that state is OK to post send */
+
+ ind = qp->sq.next;
+
+ for (nreq = 0; wr; ++nreq, wr = wr->next) {
+ if (qp->sq.cur + nreq >= qp->sq.max) {
+ mthca_err(dev, "SQ full (%d posted, %d max, %d nreq)\n",
+ qp->sq.cur, qp->sq.max, nreq);
+ err = -ENOMEM;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ wqe = get_send_wqe(qp, ind);
+ prev_wqe = qp->sq.last;
+ qp->sq.last = wqe;
+
+ ((struct mthca_next_seg *) wqe)->nda_op = 0;
+ ((struct mthca_next_seg *) wqe)->ee_nds = 0;
+ ((struct mthca_next_seg *) wqe)->flags =
+ ((wr->send_flags & IB_SEND_SIGNALED) ?
+ cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) |
+ ((wr->send_flags & IB_SEND_SOLICITED) ?
+ cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0) |
+ cpu_to_be32(1);
+ if (wr->opcode == IB_WR_SEND_WITH_IMM ||
+ wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
+ ((struct mthca_next_seg *) wqe)->flags = wr->imm_data;
+
+ wqe += sizeof (struct mthca_next_seg);
+ size = sizeof (struct mthca_next_seg) / 16;
+
+ if (qp->transport == UD) {
+ ((struct mthca_ud_seg *) wqe)->lkey =
+ cpu_to_be32(to_mah(wr->wr.ud.ah)->key);
+ ((struct mthca_ud_seg *) wqe)->av_addr =
+ cpu_to_be64(to_mah(wr->wr.ud.ah)->avdma);
+ ((struct mthca_ud_seg *) wqe)->dqpn =
+ cpu_to_be32(wr->wr.ud.remote_qpn);
+ ((struct mthca_ud_seg *) wqe)->qkey =
+ cpu_to_be32(wr->wr.ud.remote_qkey);
+
+ wqe += sizeof (struct mthca_ud_seg);
+ size += sizeof (struct mthca_ud_seg) / 16;
+ } else if (qp->transport == MLX) {
+ err = build_mlx_header(dev, to_msqp(qp), ind, wr,
+ wqe - sizeof (struct mthca_next_seg),
+ wqe);
+ if (err) {
+ *bad_wr = wr;
+ goto out;
+ }
+ wqe += sizeof (struct mthca_data_seg);
+ size += sizeof (struct mthca_data_seg) / 16;
+ }
+
+ if (wr->num_sge > qp->sq.max_gs) {
+ mthca_err(dev, "too many gathers\n");
+ err = -EINVAL;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ for (i = 0; i < wr->num_sge; ++i) {
+ ((struct mthca_data_seg *) wqe)->byte_count =
+ cpu_to_be32(wr->sg_list[i].length);
+ ((struct mthca_data_seg *) wqe)->lkey =
+ cpu_to_be32(wr->sg_list[i].lkey);
+ ((struct mthca_data_seg *) wqe)->addr =
+ cpu_to_be64(wr->sg_list[i].addr);
+ wqe += sizeof (struct mthca_data_seg);
+ size += sizeof (struct mthca_data_seg) / 16;
+ }
+
+ /* Add one more inline data segment for ICRC */
+ if (qp->transport == MLX) {
+ ((struct mthca_data_seg *) wqe)->byte_count =
+ cpu_to_be32((1 << 31) | 4);
+ ((u32 *) wqe)[1] = 0;
+ wqe += sizeof (struct mthca_data_seg);
+ size += sizeof (struct mthca_data_seg) / 16;
+ }
+
+ qp->wrid[ind + qp->rq.max] = wr->wr_id;
+
+ if (wr->opcode >= ARRAY_SIZE(opcode)) {
+ mthca_err(dev, "opcode invalid\n");
+ err = -EINVAL;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ if (prev_wqe) {
+ ((struct mthca_next_seg *) prev_wqe)->nda_op =
+ cpu_to_be32(((ind << qp->sq.wqe_shift) +
+ qp->send_wqe_offset) |
+ opcode[wr->opcode]);
+ smp_wmb();
+ ((struct mthca_next_seg *) prev_wqe)->ee_nds =
+ cpu_to_be32((size0 ? 0 : MTHCA_NEXT_DBD) | size);
+ }
+
+ if (!size0) {
+ size0 = size;
+ op0 = opcode[wr->opcode];
+ }
+
+ ++ind;
+ if (unlikely(ind >= qp->sq.max))
+ ind -= qp->sq.max;
+ }
+
+out:
+ if (nreq) {
+ u32 doorbell[2];
+
+ doorbell[0] = cpu_to_be32(((qp->sq.next << qp->sq.wqe_shift) +
+ qp->send_wqe_offset) | f0 | op0);
+ doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0);
+
+ wmb();
+
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_SEND_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+ }
+
+ qp->sq.cur += nreq;
+ qp->sq.next = ind;
+
+ spin_unlock_irqrestore(&qp->lock, flags);
+ return err;
+}
+
+int mthca_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct mthca_dev *dev = to_mdev(ibqp->device);
+ struct mthca_qp *qp = to_mqp(ibqp);
+ unsigned long flags;
+ int err = 0;
+ int nreq;
+ int i;
+ int size;
+ int size0 = 0;
+ int ind;
+ void *wqe;
+ void *prev_wqe;
+
+ spin_lock_irqsave(&qp->lock, flags);
+
+ /* XXX check that state is OK to post receive */
+
+ ind = qp->rq.next;
+
+ for (nreq = 0; wr; ++nreq, wr = wr->next) {
+ if (qp->rq.cur + nreq >= qp->rq.max) {
+ mthca_err(dev, "RQ %06x full\n", qp->qpn);
+ err = -ENOMEM;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ wqe = get_recv_wqe(qp, ind);
+ prev_wqe = qp->rq.last;
+ qp->rq.last = wqe;
+
+ ((struct mthca_next_seg *) wqe)->nda_op = 0;
+ ((struct mthca_next_seg *) wqe)->ee_nds =
+ cpu_to_be32(MTHCA_NEXT_DBD);
+ ((struct mthca_next_seg *) wqe)->flags =
+ (wr->recv_flags & IB_RECV_SIGNALED) ?
+ cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0;
+
+ wqe += sizeof (struct mthca_next_seg);
+ size = sizeof (struct mthca_next_seg) / 16;
+
+ if (wr->num_sge > qp->rq.max_gs) {
+ err = -EINVAL;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ for (i = 0; i < wr->num_sge; ++i) {
+ ((struct mthca_data_seg *) wqe)->byte_count =
+ cpu_to_be32(wr->sg_list[i].length);
+ ((struct mthca_data_seg *) wqe)->lkey =
+ cpu_to_be32(wr->sg_list[i].lkey);
+ ((struct mthca_data_seg *) wqe)->addr =
+ cpu_to_be64(wr->sg_list[i].addr);
+ wqe += sizeof (struct mthca_data_seg);
+ size += sizeof (struct mthca_data_seg) / 16;
+ }
+
+ qp->wrid[ind] = wr->wr_id;
+
+ if (prev_wqe) {
+ ((struct mthca_next_seg *) prev_wqe)->nda_op =
+ cpu_to_be32((ind << qp->rq.wqe_shift) | 1);
+ smp_wmb();
+ ((struct mthca_next_seg *) prev_wqe)->ee_nds =
+ cpu_to_be32(MTHCA_NEXT_DBD | size);
+ }
+
+ if (!size0)
+ size0 = size;
+
+ ++ind;
+ if (unlikely(ind >= qp->rq.max))
+ ind -= qp->rq.max;
+ }
+
+out:
+ if (nreq) {
+ u32 doorbell[2];
+
+ doorbell[0] = cpu_to_be32((qp->rq.next << qp->rq.wqe_shift) | size0);
+ doorbell[1] = cpu_to_be32((qp->qpn << 8) | nreq);
+
+ wmb();
+
+ mthca_write64(doorbell,
+ dev->kar + MTHCA_RECEIVE_DOORBELL,
+ MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock));
+ }
+
+ qp->rq.cur += nreq;
+ qp->rq.next = ind;
+
+ spin_unlock_irqrestore(&qp->lock, flags);
+ return err;
+}
+
+int mthca_free_err_wqe(struct mthca_qp *qp, int is_send,
+ int index, int *dbd, u32 *new_wqe)
+{
+ struct mthca_next_seg *next;
+
+ if (is_send)
+ next = get_send_wqe(qp, index);
+ else
+ next = get_recv_wqe(qp, index);
+
+ *dbd = !!(next->ee_nds & cpu_to_be32(MTHCA_NEXT_DBD));
+ if (next->ee_nds & cpu_to_be32(0x3f))
+ *new_wqe = (next->nda_op & cpu_to_be32(~0x3f)) |
+ (next->ee_nds & cpu_to_be32(0x3f));
+ else
+ *new_wqe = 0;
+
+ return 0;
+}
+
+int __devinit mthca_init_qp_table(struct mthca_dev *dev)
+{
+ int err;
+ u8 status;
+ int i;
+
+ spin_lock_init(&dev->qp_table.lock);
+
+ /*
+ * We reserve 2 extra QPs per port for the special QPs. The
+ * special QP for port 1 has to be even, so round up.
+ */
+ dev->qp_table.sqp_start = (dev->limits.reserved_qps + 1) & ~1UL;
+ err = mthca_alloc_init(&dev->qp_table.alloc,
+ dev->limits.num_qps,
+ (1 << 24) - 1,
+ dev->qp_table.sqp_start +
+ MTHCA_MAX_PORTS * 2);
+ if (err)
+ return err;
+
+ err = mthca_array_init(&dev->qp_table.qp,
+ dev->limits.num_qps);
+ if (err) {
+ mthca_alloc_cleanup(&dev->qp_table.alloc);
+ return err;
+ }
+
+ for (i = 0; i < 2; ++i) {
+ err = mthca_CONF_SPECIAL_QP(dev, i ? IB_QPT_GSI : IB_QPT_SMI,
+ dev->qp_table.sqp_start + i * 2,
+ &status);
+ if (err)
+ goto err_out;
+ if (status) {
+ mthca_warn(dev, "CONF_SPECIAL_QP returned "
+ "status %02x, aborting.\n",
+ status);
+ err = -EINVAL;
+ goto err_out;
+ }
+ }
+ return 0;
+
+ err_out:
+ for (i = 0; i < 2; ++i)
+ mthca_CONF_SPECIAL_QP(dev, i, 0, &status);
+
+ mthca_array_cleanup(&dev->qp_table.qp, dev->limits.num_qps);
+ mthca_alloc_cleanup(&dev->qp_table.alloc);
+
+ return err;
+}
+
+void __devexit mthca_cleanup_qp_table(struct mthca_dev *dev)
+{
+ int i;
+ u8 status;
+
+ for (i = 0; i < 2; ++i)
+ mthca_CONF_SPECIAL_QP(dev, i, 0, &status);
+
+ mthca_alloc_cleanup(&dev->qp_table.alloc);
+}

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