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Message-Id: <20074201532.Rlzy7s6yc7iv5IXX@cisco.com>
Date: Fri, 20 Apr 2007 15:32:36 -0700
From: Roland Dreier <rolandd@...co.com>
To: general@...ts.openfabrics.org, linux-kernel@...r.kernel.org
Subject: [PATCH 5/6] [RFC]mlx4_ib rest of files
Rest of mlx4_ib code.
Signed-off-by: Roland Dreier <rolandd@...co.com>
---
ah.c | 100 ++++
cq.c | 525 +++++++++++++++++++++++++
doorbell.c | 215 ++++++++++
mad.c | 339 ++++++++++++++++
mr.c | 184 ++++++++
qp.c | 1263 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
srq.c | 334 ++++++++++++++++
user.h | 91 ++++
8 files changed, 3051 insertions(+)
diff --git a/drivers/infiniband/hw/mlx4/ah.c b/drivers/infiniband/hw/mlx4/ah.c
new file mode 100644
index 0000000..c75ac94
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/ah.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. 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.
+ */
+
+#include "mlx4_ib.h"
+
+struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
+{
+ struct mlx4_dev *dev = to_mdev(pd->device)->dev;
+ struct mlx4_ib_ah *ah;
+
+ ah = kmalloc(sizeof *ah, GFP_ATOMIC);
+ if (!ah)
+ return ERR_PTR(-ENOMEM);
+
+ memset(&ah->av, 0, sizeof ah->av);
+
+ ah->av.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
+ ah->av.g_slid = ah_attr->src_path_bits;
+ ah->av.dlid = cpu_to_be16(ah_attr->dlid);
+ if (ah_attr->static_rate) {
+ ah->av.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
+ while (ah->av.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
+ !(1 << ah->av.stat_rate & dev->caps.stat_rate_support))
+ --ah->av.stat_rate;
+ }
+ ah->av.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
+ if (ah_attr->ah_flags & IB_AH_GRH) {
+ ah->av.g_slid |= 0x80;
+ ah->av.gid_index = ah_attr->grh.sgid_index;
+ ah->av.hop_limit = ah_attr->grh.hop_limit;
+ ah->av.sl_tclass_flowlabel |=
+ cpu_to_be32((ah_attr->grh.traffic_class << 20) |
+ ah_attr->grh.flow_label);
+ memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, 16);
+ }
+
+ return &ah->ibah;
+}
+
+int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
+{
+ struct mlx4_ib_ah *ah = to_mah(ibah);
+
+ memset(ah_attr, 0, sizeof *ah_attr);
+ ah_attr->dlid = be16_to_cpu(ah->av.dlid);
+ ah_attr->sl = be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28;
+ ah_attr->port_num = be32_to_cpu(ah->av.port_pd) >> 24;
+ if (ah->av.stat_rate)
+ ah_attr->static_rate = ah->av.stat_rate - MLX4_STAT_RATE_OFFSET;
+ ah_attr->src_path_bits = ah->av.g_slid & 0x7F;
+
+ if (mlx4_ib_ah_grh_present(ah)) {
+ ah_attr->ah_flags = IB_AH_GRH;
+
+ ah_attr->grh.traffic_class =
+ be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20;
+ ah_attr->grh.flow_label =
+ be32_to_cpu(ah->av.sl_tclass_flowlabel) & 0xfffff;
+ ah_attr->grh.hop_limit = ah->av.hop_limit;
+ ah_attr->grh.sgid_index = ah->av.gid_index;
+ memcpy(ah_attr->grh.dgid.raw, ah->av.dgid, 16);
+ }
+
+ return 0;
+}
+
+int mlx4_ib_destroy_ah(struct ib_ah *ah)
+{
+ kfree(to_mah(ah));
+ return 0;
+}
diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
new file mode 100644
index 0000000..7884f6d
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -0,0 +1,525 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. 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.
+ */
+
+#include <linux/mlx4/cq.h>
+#include <linux/mlx4/qp.h>
+
+#include "mlx4_ib.h"
+#include "user.h"
+
+static void mlx4_ib_cq_comp(struct mlx4_cq *cq)
+{
+ struct ib_cq *ibcq = &to_mibcq(cq)->ibcq;
+ ibcq->comp_handler(ibcq, ibcq->cq_context);
+}
+
+static void mlx4_ib_cq_event(struct mlx4_cq *cq, enum mlx4_event type)
+{
+ struct ib_event event;
+ struct ib_cq *ibcq;
+
+ if (type != MLX4_EVENT_TYPE_CQ_ERROR) {
+ printk(KERN_WARNING "mlx4_ib: Unexpected event type %d "
+ "on CQ %06x\n", type, cq->cqn);
+ return;
+ }
+
+ ibcq = &to_mibcq(cq)->ibcq;
+ if (ibcq->event_handler) {
+ event.device = ibcq->device;
+ event.event = IB_EVENT_CQ_ERR;
+ event.element.cq = ibcq;
+ ibcq->event_handler(&event, ibcq->cq_context);
+ }
+}
+
+static void *get_cqe_from_buf(struct mlx4_ib_cq_buf *buf, int n)
+{
+ int offset = n * sizeof (struct mlx4_cqe);
+
+ if (buf->buf.nbufs == 1)
+ return buf->buf.u.direct.buf + offset;
+ else
+ return buf->buf.u.page_list[offset >> PAGE_SHIFT].buf +
+ (offset & (PAGE_SIZE - 1));
+}
+
+static void *get_cqe(struct mlx4_ib_cq *cq, int n)
+{
+ return get_cqe_from_buf(&cq->buf, n);
+}
+
+static void *get_sw_cqe(struct mlx4_ib_cq *cq, int n)
+{
+ struct mlx4_cqe *cqe = get_cqe(cq, n & cq->ibcq.cqe);
+
+ return (!!(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK) ^
+ !!(n & (cq->ibcq.cqe + 1))) ? NULL : cqe;
+}
+
+static struct mlx4_cqe *next_cqe_sw(struct mlx4_ib_cq *cq)
+{
+ return get_sw_cqe(cq, cq->mcq.cons_index);
+}
+
+struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct mlx4_ib_dev *dev = to_mdev(ibdev);
+ struct mlx4_ib_cq *cq;
+ struct mlx4_uar *uar;
+ int buf_size;
+ int err;
+
+ if (entries < 1 || entries > dev->dev->caps.max_cqes)
+ return ERR_PTR(-EINVAL);
+
+ cq = kmalloc(sizeof *cq, GFP_KERNEL);
+ if (!cq)
+ return ERR_PTR(-ENOMEM);
+
+ entries = roundup_pow_of_two(entries + 1);
+ cq->ibcq.cqe = entries - 1;
+ buf_size = entries * sizeof (struct mlx4_cqe);
+ spin_lock_init(&cq->lock);
+
+ if (context) {
+ struct mlx4_ib_create_cq ucmd;
+
+ if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
+ err = -EFAULT;
+ goto err_cq;
+ }
+
+ cq->umem = ib_umem_get(context, ucmd.buf_addr, buf_size,
+ IB_ACCESS_LOCAL_WRITE);
+ if (IS_ERR(cq->umem)) {
+ err = PTR_ERR(cq->umem);
+ goto err_cq;
+ }
+
+ err = mlx4_mtt_init(dev->dev, ib_umem_page_count(cq->umem),
+ ilog2(cq->umem->page_size), &cq->buf.mtt);
+ if (err)
+ goto err_buf;
+
+ err = mlx4_ib_umem_write_mtt(dev, &cq->buf.mtt, cq->umem);
+ if (err)
+ goto err_mtt;
+
+ err = mlx4_ib_db_map_user(to_mucontext(context), ucmd.db_addr,
+ &cq->db);
+ if (err)
+ goto err_mtt;
+
+ uar = &to_mucontext(context)->uar;
+ } else {
+ err = mlx4_ib_db_alloc(dev, &cq->db, 1);
+ if (err)
+ goto err_cq;
+
+ cq->mcq.set_ci_db = cq->db.db;
+ cq->mcq.arm_db = cq->db.db + 1;
+ *cq->mcq.set_ci_db = 0;
+ *cq->mcq.arm_db = 0;
+
+ if (mlx4_buf_alloc(dev->dev, buf_size, PAGE_SIZE * 2, &cq->buf.buf)) {
+ err = -ENOMEM;
+ goto err_db;
+ }
+
+ err = mlx4_mtt_init(dev->dev, cq->buf.buf.npages, cq->buf.buf.page_shift,
+ &cq->buf.mtt);
+ if (err)
+ goto err_buf;
+
+ err = mlx4_buf_write_mtt(dev->dev, &cq->buf.mtt, &cq->buf.buf);
+ if (err)
+ goto err_mtt;
+
+ uar = &dev->priv_uar;
+ }
+
+ err = mlx4_cq_alloc(dev->dev, entries, &cq->buf.mtt, uar,
+ cq->db.dma, &cq->mcq);
+ if (err)
+ goto err_dbmap;
+
+ cq->mcq.comp = mlx4_ib_cq_comp;
+ cq->mcq.event = mlx4_ib_cq_event;
+
+ if (context)
+ if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof (__u32))) {
+ err = -EFAULT;
+ goto err_dbmap;
+ }
+
+ return &cq->ibcq;
+
+err_dbmap:
+ if (context)
+ mlx4_ib_db_unmap_user(to_mucontext(context), &cq->db);
+
+err_mtt:
+ mlx4_mtt_cleanup(dev->dev, &cq->buf.mtt);
+
+err_buf:
+ if (context)
+ ib_umem_release(cq->umem);
+ else
+ mlx4_buf_free(dev->dev, entries * sizeof (struct mlx4_cqe),
+ &cq->buf.buf);
+
+err_db:
+ if (!context)
+ mlx4_ib_db_free(dev, &cq->db);
+
+err_cq:
+ kfree(cq);
+
+ return ERR_PTR(err);
+}
+
+int mlx4_ib_destroy_cq(struct ib_cq *cq)
+{
+ struct mlx4_ib_dev *dev = to_mdev(cq->device);
+ struct mlx4_ib_cq *mcq = to_mcq(cq);
+
+ mlx4_cq_free(dev->dev, &mcq->mcq);
+ mlx4_mtt_cleanup(dev->dev, &mcq->buf.mtt);
+
+ if (cq->uobject) {
+ mlx4_ib_db_unmap_user(to_mucontext(cq->uobject->context), &mcq->db);
+ ib_umem_release(mcq->umem);
+ } else {
+ mlx4_buf_free(dev->dev, (cq->cqe + 1) * sizeof (struct mlx4_cqe),
+ &mcq->buf.buf);
+ mlx4_ib_db_free(dev, &mcq->db);
+ }
+
+ kfree(mcq);
+
+ return 0;
+}
+
+static void dump_cqe(void *cqe)
+{
+ __be32 *buf = cqe;
+
+ printk(KERN_DEBUG "CQE contents %08x %08x %08x %08x %08x %08x %08x %08x\n",
+ be32_to_cpu(buf[0]), be32_to_cpu(buf[1]), be32_to_cpu(buf[2]),
+ be32_to_cpu(buf[3]), be32_to_cpu(buf[4]), be32_to_cpu(buf[5]),
+ be32_to_cpu(buf[6]), be32_to_cpu(buf[7]));
+}
+
+static void mlx4_ib_handle_error_cqe(struct mlx4_err_cqe *cqe,
+ struct ib_wc *wc)
+{
+ if (cqe->syndrome == MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR) {
+ printk(KERN_DEBUG "local QP operation err "
+ "(QPN %06x, WQE index %x, vendor syndrome %02x, "
+ "opcode = %02x)\n",
+ be32_to_cpu(cqe->my_qpn), be16_to_cpu(cqe->wqe_index),
+ cqe->vendor_err_syndrome,
+ cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK);
+ dump_cqe(cqe);
+ }
+
+ switch (cqe->syndrome) {
+ case MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR:
+ wc->status = IB_WC_LOC_LEN_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR:
+ wc->status = IB_WC_LOC_QP_OP_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_LOCAL_PROT_ERR:
+ wc->status = IB_WC_LOC_PROT_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_WR_FLUSH_ERR:
+ wc->status = IB_WC_WR_FLUSH_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_MW_BIND_ERR:
+ wc->status = IB_WC_MW_BIND_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_BAD_RESP_ERR:
+ wc->status = IB_WC_BAD_RESP_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR:
+ wc->status = IB_WC_LOC_ACCESS_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR:
+ wc->status = IB_WC_REM_INV_REQ_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR:
+ wc->status = IB_WC_REM_ACCESS_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_REMOTE_OP_ERR:
+ wc->status = IB_WC_REM_OP_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR:
+ wc->status = IB_WC_RETRY_EXC_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR:
+ wc->status = IB_WC_RNR_RETRY_EXC_ERR;
+ break;
+ case MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR:
+ wc->status = IB_WC_REM_ABORT_ERR;
+ break;
+ default:
+ wc->status = IB_WC_GENERAL_ERR;
+ break;
+ }
+
+ wc->vendor_err = cqe->vendor_err_syndrome;
+}
+
+static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
+ struct mlx4_ib_qp **cur_qp,
+ struct ib_wc *wc)
+{
+ struct mlx4_cqe *cqe;
+ struct mlx4_qp *mqp;
+ struct mlx4_ib_wq *wq;
+ struct mlx4_ib_srq *srq;
+ int is_send;
+ int is_error;
+ u16 wqe_ctr;
+
+ cqe = next_cqe_sw(cq);
+ if (!cqe)
+ return -EAGAIN;
+
+ ++cq->mcq.cons_index;
+
+ /*
+ * Make sure we read CQ entry contents after we've checked the
+ * ownership bit.
+ */
+ rmb();
+
+ is_send = cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK;
+ is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
+ MLX4_CQE_OPCODE_ERROR;
+
+ if (!*cur_qp ||
+ (be32_to_cpu(cqe->my_qpn) & 0xffffff) != (*cur_qp)->mqp.qpn) {
+ /*
+ * We do not have to take the QP table lock here,
+ * because CQs will be locked while QPs are removed
+ * from the table.
+ */
+ mqp = __mlx4_qp_lookup(to_mdev(cq->ibcq.device)->dev,
+ be32_to_cpu(cqe->my_qpn));
+ if (unlikely(!mqp)) {
+ printk(KERN_WARNING "CQ %06x with entry for unknown QPN %06x\n",
+ cq->mcq.cqn, be32_to_cpu(cqe->my_qpn) & 0xffffff);
+ return -EINVAL;
+ }
+
+ *cur_qp = to_mibqp(mqp);
+ }
+
+ wc->qp = &(*cur_qp)->ibqp;
+
+ if (is_send) {
+ wq = &(*cur_qp)->sq;
+ wqe_ctr = be16_to_cpu(cqe->wqe_index);
+ wq->tail += wqe_ctr - (u16) wq->tail;
+ wc->wr_id = wq->wrid[wq->tail & (wq->max - 1)];
+ ++wq->tail;
+ } else if ((*cur_qp)->ibqp.srq) {
+ srq = to_msrq((*cur_qp)->ibqp.srq);
+ wqe_ctr = be16_to_cpu(cqe->wqe_index);
+ wc->wr_id = srq->wrid[wqe_ctr];
+ mlx4_ib_free_srq_wqe(srq, wqe_ctr);
+ } else {
+ wq = &(*cur_qp)->rq;
+ wc->wr_id = wq->wrid[wq->tail & (wq->max - 1)];
+ ++wq->tail;
+ }
+
+ if (unlikely(is_error)) {
+ mlx4_ib_handle_error_cqe((struct mlx4_err_cqe *) cqe, wc);
+ return 0;
+ }
+
+ wc->status = IB_WC_SUCCESS;
+
+ if (is_send) {
+ wc->wc_flags = 0;
+ switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
+ case MLX4_OPCODE_RDMA_WRITE_IMM:
+ wc->wc_flags |= IB_WC_WITH_IMM;
+ case MLX4_OPCODE_RDMA_WRITE:
+ wc->opcode = IB_WC_RDMA_WRITE;
+ break;
+ case MLX4_OPCODE_SEND_IMM:
+ wc->wc_flags |= IB_WC_WITH_IMM;
+ case MLX4_OPCODE_SEND:
+ wc->opcode = IB_WC_SEND;
+ break;
+ case MLX4_OPCODE_RDMA_READ:
+ wc->opcode = IB_WC_SEND;
+ wc->byte_len = be32_to_cpu(cqe->byte_cnt);
+ break;
+ case MLX4_OPCODE_ATOMIC_CS:
+ wc->opcode = IB_WC_COMP_SWAP;
+ wc->byte_len = 8;
+ break;
+ case MLX4_OPCODE_ATOMIC_FA:
+ wc->opcode = IB_WC_FETCH_ADD;
+ wc->byte_len = 8;
+ break;
+ case MLX4_OPCODE_BIND_MW:
+ wc->opcode = IB_WC_BIND_MW;
+ break;
+ }
+ } else {
+ wc->byte_len = be32_to_cpu(cqe->byte_cnt);
+
+ switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
+ case MLX4_RECV_OPCODE_RDMA_WRITE_IMM:
+ wc->opcode = IB_WC_RECV_RDMA_WITH_IMM;
+ wc->wc_flags = IB_WC_WITH_IMM;
+ wc->imm_data = cqe->immed_rss_invalid;
+ break;
+ case MLX4_RECV_OPCODE_SEND:
+ wc->opcode = IB_WC_RECV;
+ wc->wc_flags = 0;
+ break;
+ case MLX4_RECV_OPCODE_SEND_IMM:
+ wc->opcode = IB_WC_RECV;
+ wc->wc_flags = IB_WC_WITH_IMM;
+ wc->imm_data = cqe->immed_rss_invalid;
+ break;
+ }
+
+ wc->slid = be16_to_cpu(cqe->rlid);
+ wc->sl = cqe->sl >> 4;
+ wc->src_qp = be32_to_cpu(cqe->g_mlpath_rqpn) & 0xffffff;
+ wc->dlid_path_bits = (be32_to_cpu(cqe->g_mlpath_rqpn) >> 24) & 0x7f;
+ wc->wc_flags |= be32_to_cpu(cqe->g_mlpath_rqpn) & 0x80000000 ?
+ IB_WC_GRH : 0;
+ wc->pkey_index = be32_to_cpu(cqe->immed_rss_invalid) >> 16;
+ }
+
+ return 0;
+}
+
+int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
+{
+ struct mlx4_ib_cq *cq = to_mcq(ibcq);
+ struct mlx4_ib_qp *cur_qp = NULL;
+ unsigned long flags;
+ int npolled;
+ int err = 0;
+
+ spin_lock_irqsave(&cq->lock, flags);
+
+ for (npolled = 0; npolled < num_entries; ++npolled) {
+ err = mlx4_ib_poll_one(cq, &cur_qp, wc + npolled);
+ if (err)
+ break;
+ }
+
+ if (npolled)
+ mlx4_cq_set_ci(&cq->mcq);
+
+ spin_unlock_irqrestore(&cq->lock, flags);
+
+ if (err == 0 || err == -EAGAIN)
+ return npolled;
+ else
+ return err;
+}
+
+int mlx4_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify notify)
+{
+ mlx4_cq_arm(&to_mcq(ibcq)->mcq,
+ notify == IB_CQ_SOLICITED ? MLX4_CQ_DB_REQ_NOT_SOL :
+ MLX4_CQ_DB_REQ_NOT,
+ to_mdev(ibcq->device)->uar_map,
+ MLX4_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->uar_lock));
+
+ return 0;
+}
+
+void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
+{
+ u32 prod_index;
+ int nfreed = 0;
+ struct mlx4_cqe *cqe;
+
+ /*
+ * 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->mcq.cons_index; get_sw_cqe(cq, prod_index); ++prod_index)
+ if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe)
+ break;
+
+ /*
+ * Now sweep backwards through the CQ, removing CQ entries
+ * that match our QP by copying older entries on top of them.
+ */
+ while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) {
+ cqe = get_cqe(cq, prod_index & cq->ibcq.cqe);
+ if ((be32_to_cpu(cqe->my_qpn) & 0xffffff) == qpn) {
+ if (srq && !(cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK))
+ mlx4_ib_free_srq_wqe(srq, be16_to_cpu(cqe->wqe_index));
+ ++nfreed;
+ } else if (nfreed)
+ memcpy(get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe),
+ cqe, sizeof *cqe);
+ }
+
+ if (nfreed) {
+ cq->mcq.cons_index += nfreed;
+ /*
+ * Make sure update of buffer contents is done before
+ * updating consumer index.
+ */
+ wmb();
+ mlx4_cq_set_ci(&cq->mcq);
+ }
+}
+
+void mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
+{
+ spin_lock_irq(&cq->lock);
+ __mlx4_ib_cq_clean(cq, qpn, srq);
+ spin_unlock_irq(&cq->lock);
+}
diff --git a/drivers/infiniband/hw/mlx4/doorbell.c b/drivers/infiniband/hw/mlx4/doorbell.c
new file mode 100644
index 0000000..c3398a3
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/doorbell.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. 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.
+ */
+
+#include <linux/slab.h>
+
+#include "mlx4_ib.h"
+
+struct mlx4_ib_db_pgdir {
+ struct list_head list;
+ DECLARE_BITMAP(order0, MLX4_IB_DB_PER_PAGE);
+ DECLARE_BITMAP(order1, MLX4_IB_DB_PER_PAGE / 2);
+ unsigned long *bits[2];
+ __be32 *db_page;
+ dma_addr_t db_dma;
+};
+
+static struct mlx4_ib_db_pgdir *mlx4_ib_alloc_db_pgdir(struct mlx4_ib_dev *dev)
+{
+ struct mlx4_ib_db_pgdir *pgdir;
+
+ pgdir = kzalloc(sizeof *pgdir, GFP_KERNEL);
+ if (!pgdir)
+ return NULL;
+
+ bitmap_fill(pgdir->order1, MLX4_IB_DB_PER_PAGE / 2);
+ pgdir->bits[0] = pgdir->order0;
+ pgdir->bits[1] = pgdir->order1;
+ pgdir->db_page = dma_alloc_coherent(dev->ib_dev.dma_device,
+ PAGE_SIZE, &pgdir->db_dma,
+ GFP_KERNEL);
+ if (!pgdir->db_page) {
+ kfree(pgdir);
+ return NULL;
+ }
+
+ return pgdir;
+}
+
+static int mlx4_ib_alloc_db_from_pgdir(struct mlx4_ib_db_pgdir *pgdir,
+ struct mlx4_ib_db *db, int order)
+{
+ int o;
+ int i;
+
+ for (o = order; o <= 1; ++o) {
+ i = find_first_bit(pgdir->bits[o], MLX4_IB_DB_PER_PAGE >> o);
+ if (i < MLX4_IB_DB_PER_PAGE >> o)
+ goto found;
+ }
+
+ return -ENOMEM;
+
+found:
+ clear_bit(i, pgdir->bits[o]);
+
+ i <<= o;
+
+ if (o > order)
+ set_bit(i ^ 1, pgdir->bits[order]);
+
+ db->u.pgdir = pgdir;
+ db->index = i;
+ db->db = pgdir->db_page + db->index;
+ db->dma = pgdir->db_dma + db->index * 4;
+ db->order = order;
+
+ return 0;
+}
+
+int mlx4_ib_db_alloc(struct mlx4_ib_dev *dev, struct mlx4_ib_db *db, int order)
+{
+ struct mlx4_ib_db_pgdir *pgdir;
+ int ret = 0;
+
+ spin_lock(&dev->pgdir_lock);
+
+ list_for_each_entry(pgdir, &dev->pgdir_list, list)
+ if (!mlx4_ib_alloc_db_from_pgdir(pgdir, db, order))
+ goto out;
+
+ pgdir = mlx4_ib_alloc_db_pgdir(dev);
+ if (!pgdir) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ list_add(&pgdir->list, &dev->pgdir_list);
+
+ BUG_ON(mlx4_ib_alloc_db_from_pgdir(pgdir, db, order));
+
+out:
+ spin_unlock(&dev->pgdir_lock);
+
+ return ret;
+}
+
+void mlx4_ib_db_free(struct mlx4_ib_dev *dev, struct mlx4_ib_db *db)
+{
+ int o;
+ int i;
+
+ spin_lock(&dev->pgdir_lock);
+
+ o = db->order;
+ i = db->index >> db->order;
+
+ if (db->order == 0 && test_bit(i ^ 1, db->u.pgdir->order0)) {
+ clear_bit(i ^ 1, db->u.pgdir->order0);
+ ++o;
+ }
+
+ i >>= o;
+ set_bit(i, db->u.pgdir->bits[o]);
+
+ if (bitmap_full(db->u.pgdir->order1, MLX4_IB_DB_PER_PAGE / 2)) {
+ dma_free_coherent(dev->ib_dev.dma_device, PAGE_SIZE,
+ db->u.pgdir->db_page, db->u.pgdir->db_dma);
+ list_del(&db->u.pgdir->list);
+ kfree(db->u.pgdir);
+ }
+
+ spin_unlock(&dev->pgdir_lock);
+}
+
+struct mlx4_ib_user_db_page {
+ struct list_head list;
+ struct ib_umem *umem;
+ unsigned long user_virt;
+ int refcnt;
+};
+
+int mlx4_ib_db_map_user(struct mlx4_ib_ucontext *context, unsigned long virt,
+ struct mlx4_ib_db *db)
+{
+ struct mlx4_ib_user_db_page *page;
+ struct ib_umem_chunk *chunk;
+ int err = 0;
+
+ mutex_lock(&context->db_page_mutex);
+
+ list_for_each_entry(page, &context->db_page_list, list)
+ if (page->user_virt == (virt & PAGE_MASK))
+ goto found;
+
+ page = kmalloc(sizeof *page, GFP_KERNEL);
+ if (!page) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ page->user_virt = (virt & PAGE_MASK);
+ page->refcnt = 0;
+ page->umem = ib_umem_get(&context->ibucontext, virt & PAGE_MASK,
+ PAGE_SIZE, 0);
+ if (IS_ERR(page->umem)) {
+ err = PTR_ERR(page->umem);
+ kfree(page);
+ goto out;
+ }
+
+ list_add(&page->list, &context->db_page_list);
+
+found:
+ chunk = list_entry(page->umem->chunk_list.next, struct ib_umem_chunk, list);
+ db->dma = sg_dma_address(chunk->page_list) + (virt & ~PAGE_MASK);
+ db->u.user_page = page;
+ ++page->refcnt;
+
+out:
+ mutex_unlock(&context->db_page_mutex);
+
+ return err;
+}
+
+void mlx4_ib_db_unmap_user(struct mlx4_ib_ucontext *context, struct mlx4_ib_db *db)
+{
+ mutex_lock(&context->db_page_mutex);
+
+ if (!--db->u.user_page->refcnt) {
+ list_del(&db->u.user_page->list);
+ ib_umem_release(db->u.user_page->umem);
+ kfree(db->u.user_page);
+ }
+
+ mutex_unlock(&context->db_page_mutex);
+}
diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
new file mode 100644
index 0000000..3330917
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -0,0 +1,339 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. 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.
+ */
+
+#include <rdma/ib_mad.h>
+#include <rdma/ib_smi.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4_ib.h"
+
+enum {
+ MLX4_IB_VENDOR_CLASS1 = 0x9,
+ MLX4_IB_VENDOR_CLASS2 = 0xa
+};
+
+int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey,
+ int port, struct ib_wc *in_wc, struct ib_grh *in_grh,
+ void *in_mad, void *response_mad)
+{
+ struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
+ void *inbox;
+ int err;
+ u32 in_modifier = port;
+ u8 op_modifier = 0;
+
+ inmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
+ if (IS_ERR(inmailbox))
+ return PTR_ERR(inmailbox);
+ inbox = inmailbox->buf;
+
+ outmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
+ if (IS_ERR(outmailbox)) {
+ mlx4_free_cmd_mailbox(dev->dev, inmailbox);
+ return PTR_ERR(outmailbox);
+ }
+
+ memcpy(inbox, in_mad, 256);
+
+ /*
+ * Key check traps can't be generated unless we have in_wc to
+ * tell us where to send the trap.
+ */
+ if (ignore_mkey || !in_wc)
+ op_modifier |= 0x1;
+ if (ignore_bkey || !in_wc)
+ op_modifier |= 0x2;
+
+ if (in_wc) {
+ struct {
+ __be32 my_qpn;
+ u32 reserved1;
+ __be32 rqpn;
+ u8 sl;
+ u8 g_path;
+ u16 reserved2[2];
+ __be16 pkey;
+ u32 reserved3[11];
+ u8 grh[40];
+ } *ext_info;
+
+ memset(inbox + 256, 0, 256);
+ ext_info = inbox + 256;
+
+ ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num);
+ ext_info->rqpn = cpu_to_be32(in_wc->src_qp);
+ ext_info->sl = in_wc->sl << 4;
+ ext_info->g_path = in_wc->dlid_path_bits |
+ (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
+ ext_info->pkey = cpu_to_be16(in_wc->pkey_index);
+
+ if (in_grh)
+ memcpy(ext_info->grh, in_grh, 40);
+
+ op_modifier |= 0x4;
+
+ in_modifier |= in_wc->slid << 16;
+ }
+
+ err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma,
+ in_modifier, op_modifier,
+ MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
+
+ if (!err);
+ memcpy(response_mad, outmailbox->buf, 256);
+
+ mlx4_free_cmd_mailbox(dev->dev, inmailbox);
+ mlx4_free_cmd_mailbox(dev->dev, outmailbox);
+
+ return err;
+}
+
+static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl)
+{
+ struct ib_ah *new_ah;
+ struct ib_ah_attr ah_attr;
+
+ if (!dev->send_agent[port_num - 1][0])
+ return;
+
+ memset(&ah_attr, 0, sizeof ah_attr);
+ ah_attr.dlid = lid;
+ ah_attr.sl = sl;
+ ah_attr.port_num = port_num;
+
+ new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
+ &ah_attr);
+ if (IS_ERR(new_ah))
+ return;
+
+ spin_lock(&dev->sm_lock);
+ if (dev->sm_ah[port_num - 1])
+ ib_destroy_ah(dev->sm_ah[port_num - 1]);
+ dev->sm_ah[port_num - 1] = new_ah;
+ spin_unlock(&dev->sm_lock);
+}
+
+/*
+ * Snoop SM MADs for port info and P_Key table sets, so we can
+ * synthesize LID change and P_Key change events.
+ */
+static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad)
+{
+ struct ib_event event;
+
+ if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
+ mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
+ mad->mad_hdr.method == IB_MGMT_METHOD_SET) {
+ if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
+ struct ib_port_info *pinfo =
+ (struct ib_port_info *) ((struct ib_smp *) mad)->data;
+
+ update_sm_ah(to_mdev(ibdev), port_num,
+ be16_to_cpu(pinfo->sm_lid),
+ pinfo->neighbormtu_mastersmsl & 0xf);
+
+ event.device = ibdev;
+ event.element.port_num = port_num;
+
+ if(pinfo->clientrereg_resv_subnetto & 0x80)
+ event.event = IB_EVENT_CLIENT_REREGISTER;
+ else
+ event.event = IB_EVENT_LID_CHANGE;
+
+ ib_dispatch_event(&event);
+ }
+
+ if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
+ event.device = ibdev;
+ event.event = IB_EVENT_PKEY_CHANGE;
+ event.element.port_num = port_num;
+ ib_dispatch_event(&event);
+ }
+ }
+}
+
+static void node_desc_override(struct ib_device *dev,
+ struct ib_mad *mad)
+{
+ if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
+ mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
+ mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
+ mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
+ spin_lock(&to_mdev(dev)->sm_lock);
+ memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
+ spin_unlock(&to_mdev(dev)->sm_lock);
+ }
+}
+
+static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad)
+{
+ int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
+ struct ib_mad_send_buf *send_buf;
+ struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
+ int ret;
+
+ if (agent) {
+ send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
+ IB_MGMT_MAD_DATA, GFP_ATOMIC);
+ /*
+ * We rely here on the fact that MLX QPs don't use the
+ * address handle after the send is posted (this is
+ * wrong following the IB spec strictly, but we know
+ * it's OK for our devices).
+ */
+ spin_lock(&dev->sm_lock);
+ memcpy(send_buf->mad, mad, sizeof *mad);
+ if ((send_buf->ah = dev->sm_ah[port_num - 1]))
+ ret = ib_post_send_mad(send_buf, NULL);
+ else
+ ret = -EINVAL;
+ spin_unlock(&dev->sm_lock);
+
+ if (ret)
+ ib_free_send_mad(send_buf);
+ }
+}
+
+int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
+ struct ib_wc *in_wc, struct ib_grh *in_grh,
+ struct ib_mad *in_mad, struct ib_mad *out_mad)
+{
+ u16 slid;
+ int err;
+
+ slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
+
+ if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
+ forward_trap(to_mdev(ibdev), port_num, in_mad);
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
+ }
+
+ if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
+ in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
+ if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
+ in_mad->mad_hdr.method != IB_MGMT_METHOD_SET &&
+ in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS)
+ return IB_MAD_RESULT_SUCCESS;
+
+ /*
+ * Don't process SMInfo queries or vendor-specific
+ * MADs -- the SMA can't handle them.
+ */
+ if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO ||
+ ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) ==
+ IB_SMP_ATTR_VENDOR_MASK))
+ return IB_MAD_RESULT_SUCCESS;
+ } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
+ in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 ||
+ in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2) {
+ if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
+ in_mad->mad_hdr.method != IB_MGMT_METHOD_SET)
+ return IB_MAD_RESULT_SUCCESS;
+ } else
+ return IB_MAD_RESULT_SUCCESS;
+
+ err = mlx4_MAD_IFC(to_mdev(ibdev),
+ mad_flags & IB_MAD_IGNORE_MKEY,
+ mad_flags & IB_MAD_IGNORE_BKEY,
+ port_num, in_wc, in_grh, in_mad, out_mad);
+ if (err)
+ return IB_MAD_RESULT_FAILURE;
+
+ if (!out_mad->mad_hdr.status) {
+ smp_snoop(ibdev, port_num, in_mad);
+ node_desc_override(ibdev, out_mad);
+ }
+
+ /* set return bit in status of directed route responses */
+ if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
+ out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
+
+ if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
+ /* no response for trap repress */
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
+
+ return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
+}
+
+static void send_handler(struct ib_mad_agent *agent,
+ struct ib_mad_send_wc *mad_send_wc)
+{
+ ib_free_send_mad(mad_send_wc->send_buf);
+}
+
+int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
+{
+ struct ib_mad_agent *agent;
+ int p, q;
+ int ret;
+
+ for (p = 0; p < dev->dev->caps.num_ports; ++p)
+ for (q = 0; q <= 1; ++q) {
+ agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
+ q ? IB_QPT_GSI : IB_QPT_SMI,
+ NULL, 0, send_handler,
+ NULL, NULL);
+ if (IS_ERR(agent)) {
+ ret = PTR_ERR(agent);
+ goto err;
+ }
+ dev->send_agent[p][q] = agent;
+ }
+
+ return 0;
+
+err:
+ for (p = 0; p < dev->dev->caps.num_ports; ++p)
+ for (q = 0; q <= 1; ++q)
+ if (dev->send_agent[p][q])
+ ib_unregister_mad_agent(dev->send_agent[p][q]);
+
+ return ret;
+}
+
+void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
+{
+ struct ib_mad_agent *agent;
+ int p, q;
+
+ for (p = 0; p < dev->dev->caps.num_ports; ++p) {
+ for (q = 0; q <= 1; ++q) {
+ agent = dev->send_agent[p][q];
+ dev->send_agent[p][q] = NULL;
+ ib_unregister_mad_agent(agent);
+ }
+
+ if (dev->sm_ah[p])
+ ib_destroy_ah(dev->sm_ah[p]);
+ }
+}
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
new file mode 100644
index 0000000..85ae906
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -0,0 +1,184 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. 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.
+ */
+
+#include "mlx4_ib.h"
+
+static u32 convert_access(int acc)
+{
+ return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC : 0) |
+ (acc & IB_ACCESS_REMOTE_WRITE ? MLX4_PERM_REMOTE_WRITE : 0) |
+ (acc & IB_ACCESS_REMOTE_READ ? MLX4_PERM_REMOTE_READ : 0) |
+ (acc & IB_ACCESS_LOCAL_WRITE ? MLX4_PERM_LOCAL_WRITE : 0) |
+ MLX4_PERM_LOCAL_READ;
+}
+
+struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
+{
+ struct mlx4_ib_mr *mr;
+ int err;
+
+ mr = kmalloc(sizeof *mr, GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
+ ~0ull, convert_access(acc), 0, 0, &mr->mmr);
+ if (err)
+ goto err_free;
+
+ err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
+ if (err)
+ goto err_mr;
+
+ mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
+ mr->umem = NULL;
+
+ return &mr->ibmr;
+
+err_mr:
+ mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
+
+err_free:
+ kfree(mr);
+
+ return ERR_PTR(err);
+}
+
+int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
+ struct ib_umem *umem)
+{
+ u64 *pages;
+ struct ib_umem_chunk *chunk;
+ int i, j, k;
+ int n;
+ int len;
+ int err = 0;
+
+ pages = (u64 *) __get_free_page(GFP_KERNEL);
+ if (!pages)
+ return -ENOMEM;
+
+ i = n = 0;
+
+ list_for_each_entry(chunk, &umem->chunk_list, list)
+ for (j = 0; j < chunk->nmap; ++j) {
+ len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
+ for (k = 0; k < len; ++k) {
+ pages[i++] = sg_dma_address(&chunk->page_list[j]) +
+ umem->page_size * k;
+ /*
+ * Be friendly to WRITE_MTT firmware
+ * command, and pass it chunks of
+ * appropriate size.
+ */
+ if (i == PAGE_SIZE / sizeof (u64) - 2) {
+ err = mlx4_write_mtt(dev->dev, mtt, n,
+ i, pages);
+ if (err)
+ goto out;
+ n += i;
+ i = 0;
+ }
+ }
+ }
+
+ if (i)
+ err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
+
+out:
+ free_page((unsigned long) pages);
+ return err;
+}
+
+struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+ u64 virt_addr, int access_flags,
+ struct ib_udata *udata)
+{
+ struct mlx4_ib_dev *dev = to_mdev(pd->device);
+ struct mlx4_ib_mr *mr;
+ int shift;
+ int err;
+ int n;
+
+ mr = kmalloc(sizeof *mr, GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ mr->umem = ib_umem_get(pd->uobject->context, start, length, access_flags);
+ if (IS_ERR(mr->umem)) {
+ err = PTR_ERR(mr->umem);
+ goto err_free;
+ }
+
+ n = ib_umem_page_count(mr->umem);
+ shift = ilog2(mr->umem->page_size);
+
+ err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
+ convert_access(access_flags), n, shift, &mr->mmr);
+ if (err)
+ goto err_umem;
+
+ err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
+ if (err)
+ goto err_mr;
+
+ err = mlx4_mr_enable(dev->dev, &mr->mmr);
+ if (err)
+ goto err_mr;
+
+ mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
+
+ return &mr->ibmr;
+
+err_mr:
+ mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
+
+err_umem:
+ ib_umem_release(mr->umem);
+
+err_free:
+ kfree(mr);
+
+ return ERR_PTR(err);
+}
+
+int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
+{
+ struct mlx4_ib_mr *mr = to_mmr(ibmr);
+
+ mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
+ if (mr->umem)
+ ib_umem_release(mr->umem);
+ kfree(mr);
+
+ return 0;
+}
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
new file mode 100644
index 0000000..1f51bfd
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -0,0 +1,1263 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. 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.
+ */
+
+#include <rdma/ib_cache.h>
+#include <rdma/ib_pack.h>
+
+#include <linux/mlx4/qp.h>
+
+#include "mlx4_ib.h"
+#include "user.h"
+
+enum {
+ MLX4_IB_ACK_REQ_FREQ = 8,
+};
+
+enum {
+ MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83,
+ MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f
+};
+
+enum {
+ /*
+ * Largest possible UD header: send with GRH and immediate data.
+ */
+ MLX4_IB_UD_HEADER_SIZE = 72
+};
+
+struct mlx4_ib_sqp {
+ struct mlx4_ib_qp qp;
+ int pkey_index;
+ u32 qkey;
+ u32 send_psn;
+ struct ib_ud_header ud_header;
+ u8 header_buf[MLX4_IB_UD_HEADER_SIZE];
+};
+
+static const __be32 mlx4_ib_opcode[] = {
+ [IB_WR_SEND] = __constant_cpu_to_be32(MLX4_OPCODE_SEND),
+ [IB_WR_SEND_WITH_IMM] = __constant_cpu_to_be32(MLX4_OPCODE_SEND_IMM),
+ [IB_WR_RDMA_WRITE] = __constant_cpu_to_be32(MLX4_OPCODE_RDMA_WRITE),
+ [IB_WR_RDMA_WRITE_WITH_IMM] = __constant_cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM),
+ [IB_WR_RDMA_READ] = __constant_cpu_to_be32(MLX4_OPCODE_RDMA_READ),
+ [IB_WR_ATOMIC_CMP_AND_SWP] = __constant_cpu_to_be32(MLX4_OPCODE_ATOMIC_CS),
+ [IB_WR_ATOMIC_FETCH_AND_ADD] = __constant_cpu_to_be32(MLX4_OPCODE_ATOMIC_FA),
+};
+
+static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp)
+{
+ return container_of(mqp, struct mlx4_ib_sqp, qp);
+}
+
+static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
+{
+ return qp->mqp.qpn >= dev->dev->caps.sqp_start &&
+ qp->mqp.qpn <= dev->dev->caps.sqp_start + 3;
+}
+
+static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
+{
+ return qp->mqp.qpn >= dev->dev->caps.sqp_start &&
+ qp->mqp.qpn <= dev->dev->caps.sqp_start + 1;
+}
+
+static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
+{
+ if (qp->buf.nbufs == 1)
+ return qp->buf.u.direct.buf + offset;
+ else
+ return qp->buf.u.page_list[offset >> PAGE_SHIFT].buf +
+ (offset & (PAGE_SIZE - 1));
+}
+
+static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
+{
+ return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
+}
+
+static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
+{
+ return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift));
+}
+
+static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
+{
+ struct ib_event event;
+ struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
+
+ if (type == MLX4_EVENT_TYPE_PATH_MIG)
+ to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
+
+ if (ibqp->event_handler) {
+ event.device = ibqp->device;
+ event.element.qp = ibqp;
+ switch (type) {
+ case MLX4_EVENT_TYPE_PATH_MIG:
+ event.event = IB_EVENT_PATH_MIG;
+ break;
+ case MLX4_EVENT_TYPE_COMM_EST:
+ event.event = IB_EVENT_COMM_EST;
+ break;
+ case MLX4_EVENT_TYPE_SQ_DRAINED:
+ event.event = IB_EVENT_SQ_DRAINED;
+ break;
+ case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
+ event.event = IB_EVENT_QP_LAST_WQE_REACHED;
+ break;
+ case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
+ event.event = IB_EVENT_QP_FATAL;
+ break;
+ case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
+ event.event = IB_EVENT_PATH_MIG_ERR;
+ break;
+ case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
+ event.event = IB_EVENT_QP_REQ_ERR;
+ break;
+ case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
+ event.event = IB_EVENT_QP_ACCESS_ERR;
+ break;
+ default:
+ printk(KERN_WARNING "mlx4_ib: Unexpected event type %d "
+ "on QP %06x\n", type, qp->qpn);
+ return;
+ }
+
+ ibqp->event_handler(&event, ibqp->qp_context);
+ }
+}
+
+static int send_wqe_overhead(enum ib_qp_type type)
+{
+ /*
+ * UD WQEs must have a datagram segment.
+ * RC and UC WQEs might have a remote address segment.
+ * MLX WQEs need two extra inline data segments (for the UD
+ * header and space for the ICRC).
+ */
+ switch (type) {
+ case IB_QPT_UD:
+ return sizeof (struct mlx4_wqe_ctrl_seg) +
+ sizeof (struct mlx4_wqe_datagram_seg);
+ case IB_QPT_UC:
+ return sizeof (struct mlx4_wqe_ctrl_seg) +
+ sizeof (struct mlx4_wqe_raddr_seg);
+ case IB_QPT_RC:
+ return sizeof (struct mlx4_wqe_ctrl_seg) +
+ sizeof (struct mlx4_wqe_atomic_seg) +
+ sizeof (struct mlx4_wqe_raddr_seg);
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
+ return sizeof (struct mlx4_wqe_ctrl_seg) +
+ ALIGN(MLX4_IB_UD_HEADER_SIZE +
+ sizeof (struct mlx4_wqe_inline_seg),
+ sizeof (struct mlx4_wqe_data_seg)) +
+ ALIGN(4 +
+ sizeof (struct mlx4_wqe_inline_seg),
+ sizeof (struct mlx4_wqe_data_seg));
+ default:
+ return sizeof (struct mlx4_wqe_ctrl_seg);
+ }
+}
+
+static int set_qp_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
+ enum ib_qp_type type, struct mlx4_ib_qp *qp)
+{
+ /* Sanity check QP size before proceeding */
+ if (cap->max_send_wr > dev->dev->caps.max_wqes ||
+ cap->max_recv_wr > dev->dev->caps.max_wqes ||
+ cap->max_send_sge > dev->dev->caps.max_sq_sg ||
+ cap->max_recv_sge > dev->dev->caps.max_rq_sg ||
+ cap->max_inline_data + send_wqe_overhead(type) +
+ sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz)
+ return -EINVAL;
+
+ /*
+ * For MLX transport we need 2 extra S/G entries:
+ * one for the header and one for the checksum at the end
+ */
+ if ((type == IB_QPT_SMI || type == IB_QPT_GSI) &&
+ cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
+ return -EINVAL;
+
+ qp->rq.max = cap->max_recv_wr ? roundup_pow_of_two(cap->max_recv_wr) : 0;
+ qp->sq.max = cap->max_send_wr ? roundup_pow_of_two(cap->max_send_wr) : 0;
+
+ qp->rq.wqe_shift = ilog2(roundup_pow_of_two(cap->max_recv_sge *
+ sizeof (struct mlx4_wqe_data_seg)));
+ qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof (struct mlx4_wqe_data_seg);
+
+ qp->sq.wqe_shift = ilog2(roundup_pow_of_two(max(cap->max_send_sge *
+ sizeof (struct mlx4_wqe_data_seg),
+ cap->max_inline_data +
+ sizeof (struct mlx4_wqe_inline_seg)) +
+ send_wqe_overhead(type)));
+ qp->sq.max_gs = ((1 << qp->sq.wqe_shift) - send_wqe_overhead(type)) /
+ sizeof (struct mlx4_wqe_data_seg);
+
+ qp->buf_size = (qp->rq.max << qp->rq.wqe_shift) +
+ (qp->sq.max << qp->sq.wqe_shift);
+ if (qp->rq.wqe_shift > qp->sq.wqe_shift) {
+ qp->rq.offset = 0;
+ qp->sq.offset = qp->rq.max << qp->rq.wqe_shift;
+ } else {
+ qp->rq.offset = qp->sq.max << qp->sq.wqe_shift;
+ qp->sq.offset = 0;
+ }
+
+ cap->max_send_wr = qp->sq.max;
+ cap->max_recv_wr = qp->rq.max;
+ cap->max_send_sge = qp->sq.max_gs;
+ cap->max_recv_sge = qp->sq.max_gs;
+
+ return 0;
+}
+
+static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata, int sqpn, struct mlx4_ib_qp *qp)
+{
+ struct mlx4_wqe_ctrl_seg *ctrl;
+ int err;
+ int i;
+
+ mutex_init(&qp->mutex);
+ spin_lock_init(&qp->sq.lock);
+ spin_lock_init(&qp->rq.lock);
+
+ qp->state = IB_QPS_RESET;
+ qp->atomic_rd_en = 0;
+ qp->resp_depth = 0;
+
+ qp->rq.head = 0;
+ qp->rq.tail = 0;
+ qp->sq.head = 0;
+ qp->sq.tail = 0;
+
+ err = set_qp_size(dev, &init_attr->cap, init_attr->qp_type, qp);
+ if (err)
+ goto err;
+
+ if (pd->uobject) {
+ struct mlx4_ib_create_qp ucmd;
+
+ if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
+ err = -EFAULT;
+ goto err;
+ }
+
+ qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
+ qp->buf_size, 0);
+ if (IS_ERR(qp->umem)) {
+ err = PTR_ERR(qp->umem);
+ goto err;
+ }
+
+ err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
+ ilog2(qp->umem->page_size), &qp->mtt);
+ if (err)
+ goto err_buf;
+
+ err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
+ if (err)
+ goto err_mtt;
+
+ err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
+ ucmd.db_addr, &qp->db);
+ if (err)
+ goto err_mtt;
+ } else {
+ err = mlx4_ib_db_alloc(dev, &qp->db, 0);
+ if (err)
+ goto err;
+
+ *qp->db.db = 0;
+
+ if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf)) {
+ err = -ENOMEM;
+ goto err_db;
+ }
+
+ err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
+ &qp->mtt);
+ if (err)
+ goto err_buf;
+
+ err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf);
+ if (err)
+ goto err_mtt;
+
+ for (i = 0; i < qp->sq.max; ++i) {
+ ctrl = get_send_wqe(qp, i);
+ ctrl->owner_opcode = cpu_to_be32(1 << 31);
+ }
+
+ qp->sq.wrid = kmalloc(qp->sq.max * sizeof (u64), GFP_KERNEL);
+ qp->rq.wrid = kmalloc(qp->rq.max * sizeof (u64), GFP_KERNEL);
+
+ if (!qp->sq.wrid || !qp->rq.wrid) {
+ err = -ENOMEM;
+ goto err_wrid;
+ }
+ }
+
+ err = mlx4_qp_alloc(dev->dev, sqpn, &qp->mqp);
+ if (err)
+ goto err_wrid;
+
+ /*
+ * Hardware wants QPN written in big-endian order (after
+ * shifting) for send doorbell. Precompute this value to save
+ * a little bit when posting sends.
+ */
+ qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
+
+ if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
+ qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
+ else
+ qp->sq_signal_bits = 0;
+
+ qp->mqp.event = mlx4_ib_qp_event;
+
+ return 0;
+
+err_wrid:
+ if (pd->uobject)
+ mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
+ else {
+ kfree(qp->sq.wrid);
+ kfree(qp->rq.wrid);
+ }
+
+err_mtt:
+ mlx4_mtt_cleanup(dev->dev, &qp->mtt);
+
+err_buf:
+ if (pd->uobject)
+ ib_umem_release(qp->umem);
+ else
+ mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
+
+err_db:
+ if (!pd->uobject)
+ mlx4_ib_db_free(dev, &qp->db);
+
+err:
+ return err;
+}
+
+static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
+{
+ switch (state) {
+ case IB_QPS_RESET: return MLX4_QP_STATE_RST;
+ case IB_QPS_INIT: return MLX4_QP_STATE_INIT;
+ case IB_QPS_RTR: return MLX4_QP_STATE_RTR;
+ case IB_QPS_RTS: return MLX4_QP_STATE_RTS;
+ case IB_QPS_SQD: return MLX4_QP_STATE_SQD;
+ case IB_QPS_SQE: return MLX4_QP_STATE_SQER;
+ case IB_QPS_ERR: return MLX4_QP_STATE_ERR;
+ default: return -1;
+ }
+}
+
+static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
+{
+ if (send_cq == recv_cq)
+ spin_lock_irq(&send_cq->lock);
+ else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
+ spin_lock_irq(&send_cq->lock);
+ spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
+ } else {
+ spin_lock_irq(&recv_cq->lock);
+ spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
+ }
+}
+
+static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
+{
+ if (send_cq == recv_cq)
+ spin_unlock_irq(&send_cq->lock);
+ else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
+ spin_unlock(&recv_cq->lock);
+ spin_unlock_irq(&send_cq->lock);
+ } else {
+ spin_unlock(&send_cq->lock);
+ spin_unlock_irq(&recv_cq->lock);
+ }
+}
+
+static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
+ int is_user)
+{
+ struct mlx4_ib_cq *send_cq, *recv_cq;
+
+ if (qp->state != IB_QPS_RESET)
+ if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
+ MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
+ printk(KERN_WARNING "mlx4_ib: modify QP %06x to RESET failed.\n",
+ qp->mqp.qpn);
+
+ send_cq = to_mcq(qp->ibqp.send_cq);
+ recv_cq = to_mcq(qp->ibqp.recv_cq);
+
+ mlx4_ib_lock_cqs(send_cq, recv_cq);
+
+ if (!is_user) {
+ mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
+ qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
+ if (send_cq != recv_cq)
+ mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
+ }
+
+ mlx4_qp_remove(dev->dev, &qp->mqp);
+
+ mlx4_ib_unlock_cqs(send_cq, recv_cq);
+
+ mlx4_qp_free(dev->dev, &qp->mqp);
+ mlx4_mtt_cleanup(dev->dev, &qp->mtt);
+
+ if (is_user) {
+ mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context),
+ &qp->db);
+ ib_umem_release(qp->umem);
+ } else {
+ kfree(qp->sq.wrid);
+ kfree(qp->rq.wrid);
+ mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
+ mlx4_ib_db_free(dev, &qp->db);
+ }
+}
+
+struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata)
+{
+ struct mlx4_ib_dev *dev = to_mdev(pd->device);
+ struct mlx4_ib_sqp *sqp;
+ struct mlx4_ib_qp *qp;
+ int err;
+
+ switch (init_attr->qp_type) {
+ case IB_QPT_RC:
+ case IB_QPT_UC:
+ case IB_QPT_UD:
+ {
+ qp = kmalloc(sizeof *qp, GFP_KERNEL);
+ if (!qp)
+ return ERR_PTR(-ENOMEM);
+
+ err = create_qp_common(dev, pd, init_attr, udata, 0, qp);
+ if (err) {
+ kfree(qp);
+ return ERR_PTR(err);
+ }
+
+ qp->ibqp.qp_num = qp->mqp.qpn;
+
+ break;
+ }
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
+ {
+ /* Userspace is not allowed to create special QPs: */
+ if (pd->uobject)
+ return ERR_PTR(-EINVAL);
+
+ sqp = kmalloc(sizeof *sqp, GFP_KERNEL);
+ if (!sqp)
+ return ERR_PTR(-ENOMEM);
+
+ qp = &sqp->qp;
+
+ err = create_qp_common(dev, pd, init_attr, udata,
+ dev->dev->caps.sqp_start +
+ (init_attr->qp_type == IB_QPT_SMI ? 0 : 2) +
+ init_attr->port_num - 1,
+ qp);
+ if (err) {
+ kfree(sqp);
+ return ERR_PTR(err);
+ }
+
+ qp->port = init_attr->port_num;
+ qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
+
+ break;
+ }
+ default:
+ /* Don't support raw QPs */
+ return ERR_PTR(-EINVAL);
+ }
+
+ return &qp->ibqp;
+}
+
+int mlx4_ib_destroy_qp(struct ib_qp *qp)
+{
+ struct mlx4_ib_dev *dev = to_mdev(qp->device);
+ struct mlx4_ib_qp *mqp = to_mqp(qp);
+
+ if (is_qp0(dev, mqp))
+ mlx4_CLOSE_PORT(dev->dev, mqp->port);
+
+ destroy_qp_common(dev, mqp, !!qp->pd->uobject);
+
+ if (is_sqp(dev, mqp))
+ kfree(to_msqp(mqp));
+ else
+ kfree(mqp);
+
+ return 0;
+}
+
+static void init_port(struct mlx4_ib_dev *dev, int port)
+{
+ struct mlx4_init_port_param param;
+ int err;
+
+ memset(¶m, 0, sizeof param);
+
+ param.port_width_cap = dev->dev->caps.port_width_cap;
+ param.vl_cap = dev->dev->caps.vl_cap;
+ param.mtu = ib_mtu_enum_to_int(dev->dev->caps.mtu_cap);
+ param.max_gid = dev->dev->caps.gid_table_len;
+ param.max_pkey = dev->dev->caps.pkey_table_len;
+
+ err = mlx4_INIT_PORT(dev->dev, ¶m, port);
+ if (err)
+ printk(KERN_WARNING "INIT_PORT failed, return code %d.\n", err);
+}
+
+static int to_mlx4_st(enum ib_qp_type type)
+{
+ switch (type) {
+ case IB_QPT_RC: return MLX4_QP_ST_RC;
+ case IB_QPT_UC: return MLX4_QP_ST_UC;
+ case IB_QPT_UD: return MLX4_QP_ST_UD;
+ case IB_QPT_SMI:
+ case IB_QPT_GSI: return MLX4_QP_ST_MLX;
+ default: return -1;
+ }
+}
+
+static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, struct ib_qp_attr *attr,
+ int attr_mask)
+{
+ u8 dest_rd_atomic;
+ u32 access_flags;
+ u32 hw_access_flags = 0;
+
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
+ dest_rd_atomic = attr->max_dest_rd_atomic;
+ else
+ dest_rd_atomic = qp->resp_depth;
+
+ if (attr_mask & IB_QP_ACCESS_FLAGS)
+ access_flags = attr->qp_access_flags;
+ else
+ access_flags = qp->atomic_rd_en;
+
+ if (!dest_rd_atomic)
+ access_flags &= IB_ACCESS_REMOTE_WRITE;
+
+ if (access_flags & IB_ACCESS_REMOTE_READ)
+ hw_access_flags |= MLX4_QP_BIT_RRE;
+ if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
+ hw_access_flags |= MLX4_QP_BIT_RAE;
+ if (access_flags & IB_ACCESS_REMOTE_WRITE)
+ hw_access_flags |= MLX4_QP_BIT_RWE;
+
+ return cpu_to_be32(hw_access_flags);
+}
+
+static void store_sqp_attrs(struct mlx4_ib_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 mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
+{
+ path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
+}
+
+static int mlx4_set_path(struct mlx4_ib_dev *dev, struct ib_ah_attr *ah,
+ struct mlx4_qp_path *path, u8 port)
+{
+ path->grh_mylmc = ah->src_path_bits & 0x7f;
+ path->rlid = cpu_to_be16(ah->dlid);
+ if (ah->static_rate) {
+ path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET;
+ while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
+ !(1 << path->static_rate & dev->dev->caps.stat_rate_support))
+ --path->static_rate;
+ } else
+ path->static_rate = 0;
+ path->counter_index = 0xff;
+
+ if (ah->ah_flags & IB_AH_GRH) {
+ if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len) {
+ printk(KERN_ERR "sgid_index (%u) too large. max is %d\n",
+ ah->grh.sgid_index, dev->dev->caps.gid_table_len - 1);
+ return -1;
+ }
+
+ path->grh_mylmc |= 1 << 7;
+ path->mgid_index = ah->grh.sgid_index;
+ path->hop_limit = ah->grh.hop_limit;
+ path->tclass_flowlabel =
+ cpu_to_be32((ah->grh.traffic_class << 20) |
+ (ah->grh.flow_label));
+ memcpy(path->rgid, ah->grh.dgid.raw, 16);
+ }
+
+ path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
+ ((port - 1) << 6) | ((ah->sl & 0xf) << 2);
+
+ return 0;
+}
+
+int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_udata *udata)
+{
+ struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
+ struct mlx4_ib_qp *qp = to_mqp(ibqp);
+ struct mlx4_qp_context *context;
+ enum mlx4_qp_optpar optpar = 0;
+ enum ib_qp_state cur_state, new_state;
+ int sqd_event;
+ int err = -EINVAL;
+
+ context = kzalloc(sizeof *context, GFP_KERNEL);
+ if (!context)
+ return -ENOMEM;
+
+ mutex_lock(&qp->mutex);
+
+ cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
+ new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
+
+ if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask))
+ goto out;
+
+ if ((attr_mask & IB_QP_PKEY_INDEX) &&
+ attr->pkey_index >= dev->dev->caps.pkey_table_len) {
+ goto out;
+ }
+
+ if ((attr_mask & IB_QP_PORT) &&
+ (attr->port_num == 0 || attr->port_num > dev->dev->caps.num_ports)) {
+ goto out;
+ }
+
+ if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
+ attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
+ goto out;
+ }
+
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
+ attr->max_dest_rd_atomic > 1 << dev->dev->caps.max_qp_dest_rdma) {
+ goto out;
+ }
+
+ context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
+ (to_mlx4_st(ibqp->qp_type) << 16));
+ context->flags |= cpu_to_be32(1 << 8); /* DE? */
+
+ if (!(attr_mask & IB_QP_PATH_MIG_STATE))
+ context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
+ else {
+ optpar |= MLX4_QP_OPTPAR_PM_STATE;
+ switch (attr->path_mig_state) {
+ case IB_MIG_MIGRATED:
+ context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
+ break;
+ case IB_MIG_REARM:
+ context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
+ break;
+ case IB_MIG_ARMED:
+ context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
+ break;
+ }
+ }
+
+ if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
+ ibqp->qp_type == IB_QPT_UD)
+ context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
+ else if (attr_mask & IB_QP_PATH_MTU) {
+ if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
+ printk(KERN_ERR "path MTU (%u) is invalid\n",
+ attr->path_mtu);
+ return -EINVAL;
+ }
+ context->mtu_msgmax = (attr->path_mtu << 5) | 31;
+ }
+
+ if (qp->rq.max)
+ context->rq_size_stride = ilog2(qp->rq.max) << 3;
+ context->rq_size_stride |= qp->rq.wqe_shift - 4;
+
+ if (qp->sq.max)
+ context->sq_size_stride = ilog2(qp->sq.max) << 3;
+ context->sq_size_stride |= qp->sq.wqe_shift - 4;
+
+ /*FIXME monkeying with UAR internals?*/
+ if (qp->ibqp.uobject)
+ context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
+ else
+ context->usr_page = cpu_to_be32(dev->priv_uar.index);
+ /*FIXME looking at mqp.qpn? */
+ context->local_qpn = cpu_to_be32(qp->mqp.qpn);
+ if (attr_mask & IB_QP_DEST_QPN)
+ context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
+
+ if (attr_mask & IB_QP_PORT) {
+ if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
+ !(attr_mask & IB_QP_AV)) {
+ mlx4_set_sched(&context->pri_path, attr->port_num);
+ optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
+ }
+ }
+
+ if (attr_mask & IB_QP_PKEY_INDEX) {
+ context->pri_path.pkey_index = attr->pkey_index;
+ optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
+ }
+
+ if (attr_mask & IB_QP_RNR_RETRY) {
+ context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
+ optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
+ }
+
+ if (attr_mask & IB_QP_AV) {
+ if (mlx4_set_path(dev, &attr->ah_attr, &context->pri_path,
+ attr_mask & IB_QP_PORT ? attr->port_num : qp->port)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
+ MLX4_QP_OPTPAR_SCHED_QUEUE);
+ }
+
+ if (attr_mask & IB_QP_TIMEOUT) {
+ context->pri_path.ackto = attr->timeout << 3;
+ optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
+ }
+
+ if (attr_mask & IB_QP_ALT_PATH) {
+ if (attr->alt_pkey_index >= dev->dev->caps.pkey_table_len)
+ return -EINVAL;
+
+ if (attr->alt_port_num == 0 ||
+ attr->alt_port_num > dev->dev->caps.num_ports)
+ return -EINVAL;
+
+ if (mlx4_set_path(dev, &attr->alt_ah_attr, &context->alt_path,
+ attr->alt_port_num))
+ return -EINVAL;
+
+ context->alt_path.pkey_index = attr->alt_pkey_index;
+ context->alt_path.ackto = attr->alt_timeout << 3;
+ optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
+ }
+
+ context->pd = cpu_to_be32(to_mpd(ibqp->pd)->pdn);
+ context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
+ if (attr_mask & IB_QP_RETRY_CNT) {
+ context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
+ optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
+ }
+
+ if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
+ if (attr->max_rd_atomic)
+ context->params1 |=
+ cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
+ optpar |= MLX4_QP_OPTPAR_SRA_MAX;
+ }
+
+ if (attr_mask & IB_QP_SQ_PSN)
+ context->next_send_psn = cpu_to_be32(attr->sq_psn);
+ /*FIXME poking into CQ for cqn?*/
+ context->cqn_send = cpu_to_be32(to_mcq(ibqp->send_cq)->mcq.cqn);
+
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
+ if (attr->max_dest_rd_atomic)
+ context->params2 |=
+ cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
+ optpar |= MLX4_QP_OPTPAR_RRA_MAX;
+ }
+
+ if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
+ context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
+ optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
+ }
+
+ if (ibqp->srq)
+ context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
+
+ if (attr_mask & IB_QP_MIN_RNR_TIMER) {
+ context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
+ optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
+ }
+ if (attr_mask & IB_QP_RQ_PSN)
+ context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
+
+ /*FIXME poking into CQ for cqn?*/
+ context->cqn_recv = cpu_to_be32(to_mcq(ibqp->recv_cq)->mcq.cqn);
+
+ if (attr_mask & IB_QP_QKEY) {
+ context->qkey = cpu_to_be32(attr->qkey);
+ optpar |= MLX4_QP_OPTPAR_Q_KEY;
+ }
+
+ if (ibqp->srq)
+ context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
+
+ if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
+ context->db_rec_addr = cpu_to_be64(qp->db.dma);
+
+ if (cur_state == IB_QPS_INIT &&
+ new_state == IB_QPS_RTR &&
+ (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
+ ibqp->qp_type == IB_QPT_UD)) {
+ context->pri_path.sched_queue = (qp->port - 1) << 6;
+ if (is_qp0(dev, qp))
+ context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
+ else
+ context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
+ }
+
+ if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD &&
+ attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
+ sqd_event = 1;
+ else
+ sqd_event = 0;
+
+ err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
+ to_mlx4_state(new_state), context, optpar,
+ sqd_event, &qp->mqp);
+ if (err)
+ goto out;
+
+ qp->state = new_state;
+
+ if (attr_mask & IB_QP_ACCESS_FLAGS)
+ qp->atomic_rd_en = attr->qp_access_flags;
+ if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
+ qp->resp_depth = attr->max_dest_rd_atomic;
+ if (attr_mask & IB_QP_PORT)
+ qp->port = attr->port_num;
+ if (attr_mask & IB_QP_ALT_PATH)
+ qp->alt_port = attr->alt_port_num;
+
+ if (is_sqp(dev, qp))
+ store_sqp_attrs(to_msqp(qp), attr, attr_mask);
+
+ /*
+ * If we moved QP0 to RTR, bring the IB link up; if we moved
+ * 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, qp->port);
+
+ if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
+ (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
+ mlx4_CLOSE_PORT(dev->dev, qp->port);
+ }
+
+ /*
+ * If we moved a kernel QP to RESET, clean up all old CQ
+ * entries and reinitialize the QP.
+ */
+ if (new_state == IB_QPS_RESET && !ibqp->uobject) {
+ mlx4_ib_cq_clean(to_mcq(ibqp->recv_cq), qp->mqp.qpn,
+ ibqp->srq ? to_msrq(ibqp->srq): NULL);
+ if (ibqp->send_cq != ibqp->recv_cq)
+ mlx4_ib_cq_clean(to_mcq(ibqp->send_cq), qp->mqp.qpn, NULL);
+
+ qp->rq.head = 0;
+ qp->rq.tail = 0;
+ qp->sq.head = 0;
+ qp->sq.tail = 0;
+ *qp->db.db = 0;
+ }
+
+out:
+ mutex_unlock(&qp->mutex);
+ kfree(context);
+ return err;
+}
+
+static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
+ void *wqe)
+{
+ struct ib_device *ib_dev = &to_mdev(sqp->qp.ibqp.device)->ib_dev;
+ struct mlx4_wqe_mlx_seg *mlx = wqe;
+ struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
+ struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
+ u16 pkey;
+ int send_size;
+ int header_size;
+ int i;
+
+ send_size = 0;
+ for (i = 0; i < wr->num_sge; ++i)
+ send_size += wr->sg_list[i].length;
+
+ ib_ud_header_init(send_size, mlx4_ib_ah_grh_present(ah), &sqp->ud_header);
+
+ sqp->ud_header.lrh.service_level =
+ be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28;
+ sqp->ud_header.lrh.destination_lid = ah->av.dlid;
+ sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.g_slid & 0x7f);
+ if (mlx4_ib_ah_grh_present(ah)) {
+ sqp->ud_header.grh.traffic_class =
+ (be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20) & 0xff;
+ sqp->ud_header.grh.flow_label =
+ ah->av.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
+ ib_get_cached_gid(ib_dev, be32_to_cpu(ah->av.port_pd) >> 24,
+ ah->av.gid_index, &sqp->ud_header.grh.source_gid);
+ memcpy(sqp->ud_header.grh.destination_gid.raw,
+ ah->av.dgid, 16);
+ }
+
+ mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
+ mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
+ (sqp->ud_header.lrh.destination_lid ==
+ IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
+ (sqp->ud_header.lrh.service_level << 8));
+ mlx->rlid = sqp->ud_header.lrh.destination_lid;
+
+ 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 == IB_LID_PERMISSIVE)
+ sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
+ sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
+ if (!sqp->qp.ibqp.qp_num)
+ ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
+ else
+ ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
+ sqp->ud_header.bth.pkey = cpu_to_be16(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);
+
+ if (0) {
+ printk(KERN_ERR "built UD header of size %d:\n", header_size);
+ for (i = 0; i < header_size / 4; ++i) {
+ if (i % 8 == 0)
+ printk(" [%02x] ", i * 4);
+ printk(" %08x",
+ be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
+ if ((i + 1) % 8 == 0)
+ printk("\n");
+ }
+ printk("\n");
+ }
+
+ inl->byte_count = cpu_to_be32(1 << 31 | header_size);
+ memcpy(inl + 1, sqp->header_buf, header_size);
+
+ return ALIGN(sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
+}
+
+int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+ struct ib_send_wr **bad_wr)
+{
+ struct mlx4_ib_qp *qp = to_mqp(ibqp);
+ void *wqe;
+ struct mlx4_wqe_ctrl_seg *ctrl;
+ unsigned long flags;
+ int nreq;
+ int err = 0;
+ int ind;
+ int size;
+ int i;
+
+ spin_lock_irqsave(&qp->rq.lock, flags);
+
+ ind = qp->sq.head;
+
+ for (nreq = 0; wr; ++nreq, wr = wr->next) {
+ /* FIXME check overflow */
+
+ if (unlikely(wr->num_sge > qp->sq.max_gs)) {
+ err = -EINVAL;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.max - 1));
+ qp->sq.wrid[ind & (qp->sq.max - 1)] = wr->wr_id;
+
+ ctrl->srcrb_flags =
+ (wr->send_flags & IB_SEND_SIGNALED ?
+ cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
+ (wr->send_flags & IB_SEND_SOLICITED ?
+ cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
+ qp->sq_signal_bits;
+
+ if (wr->opcode == IB_WR_SEND_WITH_IMM ||
+ wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
+ ctrl->imm = wr->imm_data;
+ else
+ ctrl->imm = 0;
+
+ wqe += sizeof *ctrl;
+ size = sizeof *ctrl / 16;
+
+ switch (ibqp->qp_type) {
+ case IB_QPT_RC:
+ case IB_QPT_UC:
+ switch (wr->opcode) {
+ case IB_WR_ATOMIC_CMP_AND_SWP:
+ case IB_WR_ATOMIC_FETCH_AND_ADD:
+ ((struct mlx4_wqe_raddr_seg *) wqe)->raddr =
+ cpu_to_be64(wr->wr.atomic.remote_addr);
+ ((struct mlx4_wqe_raddr_seg *) wqe)->rkey =
+ cpu_to_be32(wr->wr.atomic.rkey);
+ ((struct mlx4_wqe_raddr_seg *) wqe)->reserved = 0;
+
+ wqe += sizeof (struct mlx4_wqe_raddr_seg);
+
+ if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
+ ((struct mlx4_wqe_atomic_seg *) wqe)->swap_add =
+ cpu_to_be64(wr->wr.atomic.swap);
+ ((struct mlx4_wqe_atomic_seg *) wqe)->compare =
+ cpu_to_be64(wr->wr.atomic.compare_add);
+ } else {
+ ((struct mlx4_wqe_atomic_seg *) wqe)->swap_add =
+ cpu_to_be64(wr->wr.atomic.compare_add);
+ ((struct mlx4_wqe_atomic_seg *) wqe)->compare = 0;
+ }
+
+ wqe += sizeof (struct mlx4_wqe_atomic_seg);
+ size += (sizeof (struct mlx4_wqe_raddr_seg) +
+ sizeof (struct mlx4_wqe_atomic_seg)) / 16;
+
+ break;
+
+ case IB_WR_RDMA_READ:
+ case IB_WR_RDMA_WRITE:
+ case IB_WR_RDMA_WRITE_WITH_IMM:
+ ((struct mlx4_wqe_raddr_seg *) wqe)->raddr =
+ cpu_to_be64(wr->wr.rdma.remote_addr);
+ ((struct mlx4_wqe_raddr_seg *) wqe)->rkey =
+ cpu_to_be32(wr->wr.rdma.rkey);
+ ((struct mlx4_wqe_raddr_seg *) wqe)->reserved = 0;
+
+ wqe += sizeof (struct mlx4_wqe_raddr_seg);
+ size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
+
+ break;
+
+ default:
+ /* No extra segments required for sends */
+ break;
+ }
+ break;
+
+ case IB_QPT_UD:
+ memcpy(((struct mlx4_wqe_datagram_seg *) wqe)->av,
+ &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
+ ((struct mlx4_wqe_datagram_seg *) wqe)->dqpn =
+ cpu_to_be32(wr->wr.ud.remote_qpn);
+ ((struct mlx4_wqe_datagram_seg *) wqe)->qkey =
+ cpu_to_be32(wr->wr.ud.remote_qkey);
+
+ wqe += sizeof (struct mlx4_wqe_datagram_seg);
+ size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
+ break;
+
+ case IB_QPT_SMI:
+ case IB_QPT_GSI:
+ err = build_mlx_header(to_msqp(qp), wr, ctrl);
+ if (err < 0) {
+ *bad_wr = wr;
+ goto out;
+ }
+ wqe += err;
+ size += err / 16;
+
+ err = 0;
+ break;
+
+ default:
+ break;
+ }
+
+ for (i = 0; i < wr->num_sge; ++i) {
+ ((struct mlx4_wqe_data_seg *) wqe)->byte_count =
+ cpu_to_be32(wr->sg_list[i].length);
+ ((struct mlx4_wqe_data_seg *) wqe)->lkey =
+ cpu_to_be32(wr->sg_list[i].lkey);
+ ((struct mlx4_wqe_data_seg *) wqe)->addr =
+ cpu_to_be64(wr->sg_list[i].addr);
+
+ wqe += sizeof (struct mlx4_wqe_data_seg);
+ size += sizeof (struct mlx4_wqe_data_seg) / 16;
+ }
+
+ /* Add one more inline data segment for ICRC for MLX sends */
+ if (qp->ibqp.qp_type == IB_QPT_SMI || qp->ibqp.qp_type == IB_QPT_GSI) {
+ ((struct mlx4_wqe_inline_seg *) wqe)->byte_count =
+ cpu_to_be32((1 << 31) | 4);
+ ((u32 *) wqe)[1] = 0;
+ wqe += sizeof (struct mlx4_wqe_data_seg);
+ size += sizeof (struct mlx4_wqe_data_seg) / 16;
+ }
+
+ ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
+ MLX4_WQE_CTRL_FENCE : 0) | size;
+
+ /*
+ * Make sure descriptor is fully written before
+ * setting ownership bit (because HW can start
+ * executing as soon as we do).
+ */
+ wmb();
+
+ /*FIXME check opcode validity? */
+ ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
+ (ind & qp->sq.max ? cpu_to_be32(1 << 31) : 0);
+
+ ++ind;
+ }
+
+out:
+ if (likely(nreq)) {
+ qp->sq.head += nreq;
+
+ /*
+ * Make sure that descriptors are written before
+ * doorbell record.
+ */
+ wmb();
+
+ writel(qp->doorbell_qpn,
+ to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
+
+ /*
+ * Make sure doorbells don't leak out of SQ spinlock
+ * and reach the HCA out of order.
+ */
+ mmiowb();
+ }
+
+ spin_unlock_irqrestore(&qp->rq.lock, flags);
+
+ return err;
+}
+
+int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct mlx4_ib_qp *qp = to_mqp(ibqp);
+ struct mlx4_wqe_data_seg *scat;
+ unsigned long flags;
+ int err = 0;
+ int nreq;
+ int ind;
+ int i;
+
+ spin_lock_irqsave(&qp->rq.lock, flags);
+
+ ind = qp->rq.head & (qp->rq.max - 1);
+
+ for (nreq = 0; wr; ++nreq, wr = wr->next) {
+ /* FIXME check overflow */
+
+ if (unlikely(wr->num_sge > qp->rq.max_gs)) {
+ err = -EINVAL;
+ *bad_wr = wr;
+ goto out;
+ }
+
+ scat = get_recv_wqe(qp, ind);
+
+ for (i = 0; i < wr->num_sge; ++i) {
+ scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length);
+ scat[i].lkey = cpu_to_be32(wr->sg_list[i].lkey);
+ scat[i].addr = cpu_to_be64(wr->sg_list[i].addr);
+ }
+
+ if (i < qp->rq.max_gs) {
+ scat[i].byte_count = 0;
+ scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
+ scat[i].addr = 0;
+ }
+
+ qp->rq.wrid[ind] = wr->wr_id;
+
+ ind = (ind + 1) & (qp->rq.max - 1);
+ }
+
+out:
+ if (likely(nreq)) {
+ qp->rq.head += nreq;
+
+ /*
+ * Make sure that descriptors are written before
+ * doorbell record.
+ */
+ wmb();
+
+ *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
+ }
+
+ spin_unlock_irqrestore(&qp->rq.lock, flags);
+
+ return err;
+}
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
new file mode 100644
index 0000000..42ab4a8
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -0,0 +1,334 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. 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.
+ */
+
+#include <linux/mlx4/qp.h>
+#include <linux/mlx4/srq.h>
+
+#include "mlx4_ib.h"
+#include "user.h"
+
+static void *get_wqe(struct mlx4_ib_srq *srq, int n)
+{
+ int offset = n << srq->msrq.wqe_shift;
+
+ if (srq->buf.nbufs == 1)
+ return srq->buf.u.direct.buf + offset;
+ else
+ return srq->buf.u.page_list[offset >> PAGE_SHIFT].buf +
+ (offset & (PAGE_SIZE - 1));
+}
+
+static void mlx4_ib_srq_event(struct mlx4_srq *srq, enum mlx4_event type)
+{
+ struct ib_event event;
+ struct ib_srq *ibsrq = &to_mibsrq(srq)->ibsrq;
+
+ if (ibsrq->event_handler) {
+ event.device = ibsrq->device;
+ event.element.srq = ibsrq;
+ switch (type) {
+ case MLX4_EVENT_TYPE_SRQ_LIMIT:
+ event.event = IB_EVENT_SRQ_LIMIT_REACHED;
+ break;
+ case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR:
+ event.event = IB_EVENT_SRQ_ERR;
+ break;
+ default:
+ printk(KERN_WARNING "mlx4_ib: Unexpected event type %d "
+ "on SRQ %06x\n", type, srq->srqn);
+ return;
+ }
+
+ ibsrq->event_handler(&event, ibsrq->srq_context);
+ }
+}
+
+struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
+ struct ib_srq_init_attr *init_attr,
+ struct ib_udata *udata)
+{
+ struct mlx4_ib_dev *dev = to_mdev(pd->device);
+ struct mlx4_ib_srq *srq;
+ struct mlx4_wqe_srq_next_seg *next;
+ int desc_size;
+ int buf_size;
+ int err;
+ int i;
+
+ /* Sanity check SRQ size before proceeding */
+ if (init_attr->attr.max_wr >= dev->dev->caps.max_srq_wqes ||
+ init_attr->attr.max_sge > dev->dev->caps.max_srq_sge)
+ return ERR_PTR(-EINVAL);
+
+ srq = kmalloc(sizeof *srq, GFP_KERNEL);
+ if (!srq)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&srq->mutex);
+ spin_lock_init(&srq->lock);
+ srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
+ srq->msrq.max_gs = init_attr->attr.max_sge;
+
+ desc_size = max(32UL,
+ roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
+ srq->msrq.max_gs *
+ sizeof (struct mlx4_wqe_data_seg)));
+ srq->msrq.wqe_shift = ilog2(desc_size);
+
+ buf_size = srq->msrq.max * desc_size;
+
+ if (pd->uobject) {
+ struct mlx4_ib_create_srq ucmd;
+
+ if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
+ err = -EFAULT;
+ goto err_srq;
+ }
+
+ srq->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
+ buf_size, 0);
+ if (IS_ERR(srq->umem)) {
+ err = PTR_ERR(srq->umem);
+ goto err_srq;
+ }
+
+ err = mlx4_mtt_init(dev->dev, ib_umem_page_count(srq->umem),
+ ilog2(srq->umem->page_size), &srq->mtt);
+ if (err)
+ goto err_buf;
+
+ err = mlx4_ib_umem_write_mtt(dev, &srq->mtt, srq->umem);
+ if (err)
+ goto err_mtt;
+
+ err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
+ ucmd.db_addr, &srq->db);
+ if (err)
+ goto err_mtt;
+ } else {
+ err = mlx4_ib_db_alloc(dev, &srq->db, 0);
+ if (err)
+ goto err_srq;
+
+ *srq->db.db = 0;
+
+ if (mlx4_buf_alloc(dev->dev, buf_size, PAGE_SIZE * 2, &srq->buf)) {
+ err = -ENOMEM;
+ goto err_db;
+ }
+
+ srq->head = 0;
+ srq->tail = srq->msrq.max - 1;
+ srq->wqe_ctr = 0;
+
+ for (i = 0; i < srq->msrq.max; ++i) {
+ next = get_wqe(srq, i);
+ next->next_wqe_index =
+ cpu_to_be16((i + 1) & (srq->msrq.max - 1));
+ }
+
+ err = mlx4_mtt_init(dev->dev, srq->buf.npages, srq->buf.page_shift,
+ &srq->mtt);
+ if (err)
+ goto err_buf;
+
+ err = mlx4_buf_write_mtt(dev->dev, &srq->mtt, &srq->buf);
+ if (err)
+ goto err_mtt;
+
+ srq->wrid = kmalloc(srq->msrq.max * sizeof (u64), GFP_KERNEL);
+ if (!srq->wrid) {
+ err = -ENOMEM;
+ goto err_mtt;
+ }
+ }
+
+ err = mlx4_srq_alloc(dev->dev, to_mpd(pd)->pdn, &srq->mtt,
+ srq->db.dma, &srq->msrq);
+ if (err)
+ goto err_wrid;
+
+ srq->msrq.event = mlx4_ib_srq_event;
+
+ if (pd->uobject)
+ if (ib_copy_to_udata(udata, &srq->msrq.srqn, sizeof (__u32))) {
+ err = -EFAULT;
+ goto err_wrid;
+ }
+
+ init_attr->attr.max_wr = srq->msrq.max - 1;
+
+ return &srq->ibsrq;
+
+err_wrid:
+ if (pd->uobject)
+ mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &srq->db);
+ else
+ kfree(srq->wrid);
+
+err_mtt:
+ mlx4_mtt_cleanup(dev->dev, &srq->mtt);
+
+err_buf:
+ if (pd->uobject)
+ ib_umem_release(srq->umem);
+ else
+ mlx4_buf_free(dev->dev, buf_size, &srq->buf);
+
+err_db:
+ if (!pd->uobject)
+ mlx4_ib_db_free(dev, &srq->db);
+
+err_srq:
+ kfree(srq);
+
+ return ERR_PTR(err);
+}
+
+int mlx4_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
+ enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
+{
+ struct mlx4_ib_dev *dev = to_mdev(ibsrq->device);
+ struct mlx4_ib_srq *srq = to_msrq(ibsrq);
+ int ret;
+
+ /* We don't support resizing SRQs (yet?) */
+ if (attr_mask & IB_SRQ_MAX_WR)
+ return -EINVAL;
+
+ if (attr_mask & IB_SRQ_LIMIT) {
+ if (attr->srq_limit >= srq->msrq.max)
+ return -EINVAL;
+
+ mutex_lock(&srq->mutex);
+ ret = mlx4_srq_arm(dev->dev, &srq->msrq, attr->srq_limit);
+ mutex_unlock(&srq->mutex);
+
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+int mlx4_ib_destroy_srq(struct ib_srq *srq)
+{
+ struct mlx4_ib_dev *dev = to_mdev(srq->device);
+ struct mlx4_ib_srq *msrq = to_msrq(srq);
+
+ mlx4_srq_free(dev->dev, &msrq->msrq);
+ mlx4_mtt_cleanup(dev->dev, &msrq->mtt);
+
+ if (srq->uobject) {
+ mlx4_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db);
+ ib_umem_release(msrq->umem);
+ } else {
+ kfree(msrq->wrid);
+ mlx4_buf_free(dev->dev, msrq->msrq.max << msrq->msrq.wqe_shift,
+ &msrq->buf);
+ mlx4_ib_db_free(dev, &msrq->db);
+ }
+
+ kfree(msrq);
+
+ return 0;
+}
+
+void mlx4_ib_free_srq_wqe(struct mlx4_ib_srq *srq, int wqe_index)
+{
+ struct mlx4_wqe_srq_next_seg *next;
+
+ /* always called with interrupts disabled. */
+ spin_lock(&srq->lock);
+
+ next = get_wqe(srq, srq->tail);
+ next->next_wqe_index = cpu_to_be16(wqe_index);
+ srq->tail = wqe_index;
+
+ spin_unlock(&srq->lock);
+}
+
+int mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+ struct ib_recv_wr **bad_wr)
+{
+ struct mlx4_ib_srq *srq = to_msrq(ibsrq);
+ struct mlx4_wqe_srq_next_seg *next;
+ struct mlx4_wqe_data_seg *scat;
+ unsigned long flags;
+ int err = 0;
+ int nreq;
+ int i;
+
+ spin_lock_irqsave(&srq->lock, flags);
+
+ for (nreq = 0; wr; ++nreq, wr = wr->next) {
+ if (unlikely(wr->num_sge > srq->msrq.max_gs)) {
+ err = -EINVAL;
+ *bad_wr = wr;
+ break;
+ }
+
+ srq->wrid[srq->head] = wr->wr_id;
+
+ next = get_wqe(srq, srq->head);
+ srq->head = be16_to_cpu(next->next_wqe_index);
+ scat = (struct mlx4_wqe_data_seg *) (next + 1);
+
+ for (i = 0; i < wr->num_sge; ++i) {
+ scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length);
+ scat[i].lkey = cpu_to_be32(wr->sg_list[i].lkey);
+ scat[i].addr = cpu_to_be64(wr->sg_list[i].addr);
+ }
+
+ if (i < srq->msrq.max_gs) {
+ scat[i].byte_count = 0;
+ scat[i].lkey = cpu_to_be32(MLX4_INVALID_LKEY);
+ scat[i].addr = 0;
+ }
+ }
+
+ if (likely(nreq)) {
+ srq->wqe_ctr += nreq;
+
+ /*
+ * Make sure that descriptors are written before
+ * doorbell record.
+ */
+ wmb();
+
+ *srq->db.db = cpu_to_be32(srq->wqe_ctr);
+ }
+
+ spin_unlock_irqrestore(&srq->lock, flags);
+
+ return err;
+}
diff --git a/drivers/infiniband/hw/mlx4/user.h b/drivers/infiniband/hw/mlx4/user.h
new file mode 100644
index 0000000..2f382d2
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/user.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. 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.
+ */
+
+#ifndef MLX4_IB_USER_H
+#define MLX4_IB_USER_H
+
+#include <linux/types.h>
+
+/*
+ * Increment this value if any changes that break userspace ABI
+ * compatibility are made.
+ */
+#define MLX4_IB_UVERBS_ABI_VERSION 1
+
+/*
+ * Make sure that all structs defined in this file remain laid out so
+ * that they pack the same way on 32-bit and 64-bit architectures (to
+ * avoid incompatibility between 32-bit userspace and 64-bit kernels).
+ * In particular do not use pointer types -- pass pointers in __u64
+ * instead.
+ */
+
+struct mlx4_ib_alloc_ucontext_resp {
+ __u32 qp_tab_size;
+ __u32 bf_reg_size;
+};
+
+struct mlx4_ib_alloc_pd_resp {
+ __u32 pdn;
+ __u32 reserved;
+};
+
+struct mlx4_ib_create_cq {
+ __u64 buf_addr;
+ __u64 db_addr;
+};
+
+struct mlx4_ib_create_cq_resp {
+ __u32 cqn;
+ __u32 reserved;
+};
+
+struct mlx4_ib_resize_cq {
+ __u64 buf_addr;
+};
+
+struct mlx4_ib_create_srq {
+ __u64 buf_addr;
+ __u64 db_addr;
+};
+
+struct mlx4_ib_create_srq_resp {
+ __u32 srqn;
+ __u32 reserved;
+};
+
+struct mlx4_ib_create_qp {
+ __u64 buf_addr;
+ __u64 db_addr;
+};
+
+#endif /* MLX4_IB_USER_H */
-
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