| /* |
| * Copyright (c) 2012-2016 VMware, Inc. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of EITHER the GNU General Public License |
| * version 2 as published by the Free Software Foundation or the BSD |
| * 2-Clause License. This program is distributed in the hope that it |
| * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED |
| * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
| * See the GNU General Public License version 2 for more details at |
| * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program available in the file COPYING in the main |
| * directory of this source tree. |
| * |
| * The BSD 2-Clause License |
| * |
| * 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <asm/page.h> |
| #include <linux/io.h> |
| #include <linux/wait.h> |
| #include <rdma/ib_addr.h> |
| #include <rdma/ib_smi.h> |
| #include <rdma/ib_user_verbs.h> |
| |
| #include "pvrdma.h" |
| |
| static inline void get_cqs(struct pvrdma_qp *qp, struct pvrdma_cq **send_cq, |
| struct pvrdma_cq **recv_cq) |
| { |
| *send_cq = to_vcq(qp->ibqp.send_cq); |
| *recv_cq = to_vcq(qp->ibqp.recv_cq); |
| } |
| |
| static void pvrdma_lock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq, |
| unsigned long *scq_flags, |
| unsigned long *rcq_flags) |
| __acquires(scq->cq_lock) __acquires(rcq->cq_lock) |
| { |
| if (scq == rcq) { |
| spin_lock_irqsave(&scq->cq_lock, *scq_flags); |
| __acquire(rcq->cq_lock); |
| } else if (scq->cq_handle < rcq->cq_handle) { |
| spin_lock_irqsave(&scq->cq_lock, *scq_flags); |
| spin_lock_irqsave_nested(&rcq->cq_lock, *rcq_flags, |
| SINGLE_DEPTH_NESTING); |
| } else { |
| spin_lock_irqsave(&rcq->cq_lock, *rcq_flags); |
| spin_lock_irqsave_nested(&scq->cq_lock, *scq_flags, |
| SINGLE_DEPTH_NESTING); |
| } |
| } |
| |
| static void pvrdma_unlock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq, |
| unsigned long *scq_flags, |
| unsigned long *rcq_flags) |
| __releases(scq->cq_lock) __releases(rcq->cq_lock) |
| { |
| if (scq == rcq) { |
| __release(rcq->cq_lock); |
| spin_unlock_irqrestore(&scq->cq_lock, *scq_flags); |
| } else if (scq->cq_handle < rcq->cq_handle) { |
| spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags); |
| spin_unlock_irqrestore(&scq->cq_lock, *scq_flags); |
| } else { |
| spin_unlock_irqrestore(&scq->cq_lock, *scq_flags); |
| spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags); |
| } |
| } |
| |
| static void pvrdma_reset_qp(struct pvrdma_qp *qp) |
| { |
| struct pvrdma_cq *scq, *rcq; |
| unsigned long scq_flags, rcq_flags; |
| |
| /* Clean up cqes */ |
| get_cqs(qp, &scq, &rcq); |
| pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags); |
| |
| _pvrdma_flush_cqe(qp, scq); |
| if (scq != rcq) |
| _pvrdma_flush_cqe(qp, rcq); |
| |
| pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags); |
| |
| /* |
| * Reset queuepair. The checks are because usermode queuepairs won't |
| * have kernel ringstates. |
| */ |
| if (qp->rq.ring) { |
| atomic_set(&qp->rq.ring->cons_head, 0); |
| atomic_set(&qp->rq.ring->prod_tail, 0); |
| } |
| if (qp->sq.ring) { |
| atomic_set(&qp->sq.ring->cons_head, 0); |
| atomic_set(&qp->sq.ring->prod_tail, 0); |
| } |
| } |
| |
| static int pvrdma_set_rq_size(struct pvrdma_dev *dev, |
| struct ib_qp_cap *req_cap, |
| struct pvrdma_qp *qp) |
| { |
| if (req_cap->max_recv_wr > dev->dsr->caps.max_qp_wr || |
| req_cap->max_recv_sge > dev->dsr->caps.max_sge) { |
| dev_warn(&dev->pdev->dev, "recv queue size invalid\n"); |
| return -EINVAL; |
| } |
| |
| qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_recv_wr)); |
| qp->rq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_recv_sge)); |
| |
| /* Write back */ |
| req_cap->max_recv_wr = qp->rq.wqe_cnt; |
| req_cap->max_recv_sge = qp->rq.max_sg; |
| |
| qp->rq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_rq_wqe_hdr) + |
| sizeof(struct pvrdma_sge) * |
| qp->rq.max_sg); |
| qp->npages_recv = (qp->rq.wqe_cnt * qp->rq.wqe_size + PAGE_SIZE - 1) / |
| PAGE_SIZE; |
| |
| return 0; |
| } |
| |
| static int pvrdma_set_sq_size(struct pvrdma_dev *dev, struct ib_qp_cap *req_cap, |
| struct pvrdma_qp *qp) |
| { |
| if (req_cap->max_send_wr > dev->dsr->caps.max_qp_wr || |
| req_cap->max_send_sge > dev->dsr->caps.max_sge) { |
| dev_warn(&dev->pdev->dev, "send queue size invalid\n"); |
| return -EINVAL; |
| } |
| |
| qp->sq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_send_wr)); |
| qp->sq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_send_sge)); |
| |
| /* Write back */ |
| req_cap->max_send_wr = qp->sq.wqe_cnt; |
| req_cap->max_send_sge = qp->sq.max_sg; |
| |
| qp->sq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_sq_wqe_hdr) + |
| sizeof(struct pvrdma_sge) * |
| qp->sq.max_sg); |
| /* Note: one extra page for the header. */ |
| qp->npages_send = PVRDMA_QP_NUM_HEADER_PAGES + |
| (qp->sq.wqe_cnt * qp->sq.wqe_size + PAGE_SIZE - 1) / |
| PAGE_SIZE; |
| |
| return 0; |
| } |
| |
| /** |
| * pvrdma_create_qp - create queue pair |
| * @pd: protection domain |
| * @init_attr: queue pair attributes |
| * @udata: user data |
| * |
| * @return: the ib_qp pointer on success, otherwise returns an errno. |
| */ |
| struct ib_qp *pvrdma_create_qp(struct ib_pd *pd, |
| struct ib_qp_init_attr *init_attr, |
| struct ib_udata *udata) |
| { |
| struct pvrdma_qp *qp = NULL; |
| struct pvrdma_dev *dev = to_vdev(pd->device); |
| union pvrdma_cmd_req req; |
| union pvrdma_cmd_resp rsp; |
| struct pvrdma_cmd_create_qp *cmd = &req.create_qp; |
| struct pvrdma_cmd_create_qp_resp *resp = &rsp.create_qp_resp; |
| struct pvrdma_create_qp ucmd; |
| unsigned long flags; |
| int ret; |
| bool is_srq = !!init_attr->srq; |
| |
| if (init_attr->create_flags) { |
| dev_warn(&dev->pdev->dev, |
| "invalid create queuepair flags %#x\n", |
| init_attr->create_flags); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| if (init_attr->qp_type != IB_QPT_RC && |
| init_attr->qp_type != IB_QPT_UD && |
| init_attr->qp_type != IB_QPT_GSI) { |
| dev_warn(&dev->pdev->dev, "queuepair type %d not supported\n", |
| init_attr->qp_type); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| if (is_srq && !dev->dsr->caps.max_srq) { |
| dev_warn(&dev->pdev->dev, |
| "SRQs not supported by device\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp)) |
| return ERR_PTR(-ENOMEM); |
| |
| switch (init_attr->qp_type) { |
| case IB_QPT_GSI: |
| if (init_attr->port_num == 0 || |
| init_attr->port_num > pd->device->phys_port_cnt || |
| udata) { |
| dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n"); |
| ret = -EINVAL; |
| goto err_qp; |
| } |
| /* fall through */ |
| case IB_QPT_RC: |
| case IB_QPT_UD: |
| qp = kzalloc(sizeof(*qp), GFP_KERNEL); |
| if (!qp) { |
| ret = -ENOMEM; |
| goto err_qp; |
| } |
| |
| spin_lock_init(&qp->sq.lock); |
| spin_lock_init(&qp->rq.lock); |
| mutex_init(&qp->mutex); |
| refcount_set(&qp->refcnt, 1); |
| init_completion(&qp->free); |
| |
| qp->state = IB_QPS_RESET; |
| qp->is_kernel = !udata; |
| |
| if (!qp->is_kernel) { |
| dev_dbg(&dev->pdev->dev, |
| "create queuepair from user space\n"); |
| |
| if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) { |
| ret = -EFAULT; |
| goto err_qp; |
| } |
| |
| if (!is_srq) { |
| /* set qp->sq.wqe_cnt, shift, buf_size.. */ |
| qp->rumem = ib_umem_get(pd->uobject->context, |
| ucmd.rbuf_addr, |
| ucmd.rbuf_size, 0, 0); |
| if (IS_ERR(qp->rumem)) { |
| ret = PTR_ERR(qp->rumem); |
| goto err_qp; |
| } |
| qp->srq = NULL; |
| } else { |
| qp->rumem = NULL; |
| qp->srq = to_vsrq(init_attr->srq); |
| } |
| |
| qp->sumem = ib_umem_get(pd->uobject->context, |
| ucmd.sbuf_addr, |
| ucmd.sbuf_size, 0, 0); |
| if (IS_ERR(qp->sumem)) { |
| if (!is_srq) |
| ib_umem_release(qp->rumem); |
| ret = PTR_ERR(qp->sumem); |
| goto err_qp; |
| } |
| |
| qp->npages_send = ib_umem_page_count(qp->sumem); |
| if (!is_srq) |
| qp->npages_recv = ib_umem_page_count(qp->rumem); |
| else |
| qp->npages_recv = 0; |
| qp->npages = qp->npages_send + qp->npages_recv; |
| } else { |
| ret = pvrdma_set_sq_size(to_vdev(pd->device), |
| &init_attr->cap, qp); |
| if (ret) |
| goto err_qp; |
| |
| ret = pvrdma_set_rq_size(to_vdev(pd->device), |
| &init_attr->cap, qp); |
| if (ret) |
| goto err_qp; |
| |
| qp->npages = qp->npages_send + qp->npages_recv; |
| |
| /* Skip header page. */ |
| qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE; |
| |
| /* Recv queue pages are after send pages. */ |
| qp->rq.offset = qp->npages_send * PAGE_SIZE; |
| } |
| |
| if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) { |
| dev_warn(&dev->pdev->dev, |
| "overflow pages in queuepair\n"); |
| ret = -EINVAL; |
| goto err_umem; |
| } |
| |
| ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages, |
| qp->is_kernel); |
| if (ret) { |
| dev_warn(&dev->pdev->dev, |
| "could not allocate page directory\n"); |
| goto err_umem; |
| } |
| |
| if (!qp->is_kernel) { |
| pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0); |
| if (!is_srq) |
| pvrdma_page_dir_insert_umem(&qp->pdir, |
| qp->rumem, |
| qp->npages_send); |
| } else { |
| /* Ring state is always the first page. */ |
| qp->sq.ring = qp->pdir.pages[0]; |
| qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1]; |
| } |
| break; |
| default: |
| ret = -EINVAL; |
| goto err_qp; |
| } |
| |
| /* Not supported */ |
| init_attr->cap.max_inline_data = 0; |
| |
| memset(cmd, 0, sizeof(*cmd)); |
| cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP; |
| cmd->pd_handle = to_vpd(pd)->pd_handle; |
| cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle; |
| cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle; |
| if (is_srq) |
| cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle; |
| else |
| cmd->srq_handle = 0; |
| cmd->max_send_wr = init_attr->cap.max_send_wr; |
| cmd->max_recv_wr = init_attr->cap.max_recv_wr; |
| cmd->max_send_sge = init_attr->cap.max_send_sge; |
| cmd->max_recv_sge = init_attr->cap.max_recv_sge; |
| cmd->max_inline_data = init_attr->cap.max_inline_data; |
| cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0; |
| cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type); |
| cmd->is_srq = is_srq; |
| cmd->lkey = 0; |
| cmd->access_flags = IB_ACCESS_LOCAL_WRITE; |
| cmd->total_chunks = qp->npages; |
| cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES; |
| cmd->pdir_dma = qp->pdir.dir_dma; |
| |
| dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n", |
| cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge, |
| cmd->max_recv_sge); |
| |
| ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP); |
| if (ret < 0) { |
| dev_warn(&dev->pdev->dev, |
| "could not create queuepair, error: %d\n", ret); |
| goto err_pdir; |
| } |
| |
| /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */ |
| qp->qp_handle = resp->qpn; |
| qp->port = init_attr->port_num; |
| qp->ibqp.qp_num = resp->qpn; |
| spin_lock_irqsave(&dev->qp_tbl_lock, flags); |
| dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp; |
| spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); |
| |
| return &qp->ibqp; |
| |
| err_pdir: |
| pvrdma_page_dir_cleanup(dev, &qp->pdir); |
| err_umem: |
| if (!qp->is_kernel) { |
| if (qp->rumem) |
| ib_umem_release(qp->rumem); |
| if (qp->sumem) |
| ib_umem_release(qp->sumem); |
| } |
| err_qp: |
| kfree(qp); |
| atomic_dec(&dev->num_qps); |
| |
| return ERR_PTR(ret); |
| } |
| |
| static void pvrdma_free_qp(struct pvrdma_qp *qp) |
| { |
| struct pvrdma_dev *dev = to_vdev(qp->ibqp.device); |
| struct pvrdma_cq *scq; |
| struct pvrdma_cq *rcq; |
| unsigned long flags, scq_flags, rcq_flags; |
| |
| /* In case cq is polling */ |
| get_cqs(qp, &scq, &rcq); |
| pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags); |
| |
| _pvrdma_flush_cqe(qp, scq); |
| if (scq != rcq) |
| _pvrdma_flush_cqe(qp, rcq); |
| |
| spin_lock_irqsave(&dev->qp_tbl_lock, flags); |
| dev->qp_tbl[qp->qp_handle] = NULL; |
| spin_unlock_irqrestore(&dev->qp_tbl_lock, flags); |
| |
| pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags); |
| |
| if (refcount_dec_and_test(&qp->refcnt)) |
| complete(&qp->free); |
| wait_for_completion(&qp->free); |
| |
| if (!qp->is_kernel) { |
| if (qp->rumem) |
| ib_umem_release(qp->rumem); |
| if (qp->sumem) |
| ib_umem_release(qp->sumem); |
| } |
| |
| pvrdma_page_dir_cleanup(dev, &qp->pdir); |
| |
| kfree(qp); |
| |
| atomic_dec(&dev->num_qps); |
| } |
| |
| /** |
| * pvrdma_destroy_qp - destroy a queue pair |
| * @qp: the queue pair to destroy |
| * |
| * @return: 0 on success. |
| */ |
| int pvrdma_destroy_qp(struct ib_qp *qp) |
| { |
| struct pvrdma_qp *vqp = to_vqp(qp); |
| union pvrdma_cmd_req req; |
| struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp; |
| int ret; |
| |
| memset(cmd, 0, sizeof(*cmd)); |
| cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP; |
| cmd->qp_handle = vqp->qp_handle; |
| |
| ret = pvrdma_cmd_post(to_vdev(qp->device), &req, NULL, 0); |
| if (ret < 0) |
| dev_warn(&to_vdev(qp->device)->pdev->dev, |
| "destroy queuepair failed, error: %d\n", ret); |
| |
| pvrdma_free_qp(vqp); |
| |
| return 0; |
| } |
| |
| /** |
| * pvrdma_modify_qp - modify queue pair attributes |
| * @ibqp: the queue pair |
| * @attr: the new queue pair's attributes |
| * @attr_mask: attributes mask |
| * @udata: user data |
| * |
| * @returns 0 on success, otherwise returns an errno. |
| */ |
| int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, |
| int attr_mask, struct ib_udata *udata) |
| { |
| struct pvrdma_dev *dev = to_vdev(ibqp->device); |
| struct pvrdma_qp *qp = to_vqp(ibqp); |
| union pvrdma_cmd_req req; |
| union pvrdma_cmd_resp rsp; |
| struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp; |
| enum ib_qp_state cur_state, next_state; |
| int ret; |
| |
| /* Sanity checking. Should need lock here */ |
| mutex_lock(&qp->mutex); |
| cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state : |
| qp->state; |
| next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state; |
| |
| if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type, |
| attr_mask)) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (attr_mask & IB_QP_PORT) { |
| if (attr->port_num == 0 || |
| attr->port_num > ibqp->device->phys_port_cnt) { |
| ret = -EINVAL; |
| goto out; |
| } |
| } |
| |
| if (attr_mask & IB_QP_MIN_RNR_TIMER) { |
| if (attr->min_rnr_timer > 31) { |
| ret = -EINVAL; |
| goto out; |
| } |
| } |
| |
| if (attr_mask & IB_QP_PKEY_INDEX) { |
| if (attr->pkey_index >= dev->dsr->caps.max_pkeys) { |
| ret = -EINVAL; |
| goto out; |
| } |
| } |
| |
| if (attr_mask & IB_QP_QKEY) |
| qp->qkey = attr->qkey; |
| |
| if (cur_state == next_state && cur_state == IB_QPS_RESET) { |
| ret = 0; |
| goto out; |
| } |
| |
| qp->state = next_state; |
| memset(cmd, 0, sizeof(*cmd)); |
| cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP; |
| cmd->qp_handle = qp->qp_handle; |
| cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask); |
| cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state); |
| cmd->attrs.cur_qp_state = |
| ib_qp_state_to_pvrdma(attr->cur_qp_state); |
| cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu); |
| cmd->attrs.path_mig_state = |
| ib_mig_state_to_pvrdma(attr->path_mig_state); |
| cmd->attrs.qkey = attr->qkey; |
| cmd->attrs.rq_psn = attr->rq_psn; |
| cmd->attrs.sq_psn = attr->sq_psn; |
| cmd->attrs.dest_qp_num = attr->dest_qp_num; |
| cmd->attrs.qp_access_flags = |
| ib_access_flags_to_pvrdma(attr->qp_access_flags); |
| cmd->attrs.pkey_index = attr->pkey_index; |
| cmd->attrs.alt_pkey_index = attr->alt_pkey_index; |
| cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify; |
| cmd->attrs.sq_draining = attr->sq_draining; |
| cmd->attrs.max_rd_atomic = attr->max_rd_atomic; |
| cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic; |
| cmd->attrs.min_rnr_timer = attr->min_rnr_timer; |
| cmd->attrs.port_num = attr->port_num; |
| cmd->attrs.timeout = attr->timeout; |
| cmd->attrs.retry_cnt = attr->retry_cnt; |
| cmd->attrs.rnr_retry = attr->rnr_retry; |
| cmd->attrs.alt_port_num = attr->alt_port_num; |
| cmd->attrs.alt_timeout = attr->alt_timeout; |
| ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap); |
| rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr); |
| rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr); |
| |
| ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP); |
| if (ret < 0) { |
| dev_warn(&dev->pdev->dev, |
| "could not modify queuepair, error: %d\n", ret); |
| } else if (rsp.hdr.err > 0) { |
| dev_warn(&dev->pdev->dev, |
| "cannot modify queuepair, error: %d\n", rsp.hdr.err); |
| ret = -EINVAL; |
| } |
| |
| if (ret == 0 && next_state == IB_QPS_RESET) |
| pvrdma_reset_qp(qp); |
| |
| out: |
| mutex_unlock(&qp->mutex); |
| |
| return ret; |
| } |
| |
| static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n) |
| { |
| return pvrdma_page_dir_get_ptr(&qp->pdir, |
| qp->sq.offset + n * qp->sq.wqe_size); |
| } |
| |
| static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n) |
| { |
| return pvrdma_page_dir_get_ptr(&qp->pdir, |
| qp->rq.offset + n * qp->rq.wqe_size); |
| } |
| |
| static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr, |
| const struct ib_reg_wr *wr) |
| { |
| struct pvrdma_user_mr *mr = to_vmr(wr->mr); |
| |
| wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova; |
| wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma; |
| wqe_hdr->wr.fast_reg.page_shift = mr->page_shift; |
| wqe_hdr->wr.fast_reg.page_list_len = mr->npages; |
| wqe_hdr->wr.fast_reg.length = mr->ibmr.length; |
| wqe_hdr->wr.fast_reg.access_flags = wr->access; |
| wqe_hdr->wr.fast_reg.rkey = wr->key; |
| |
| return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages, |
| mr->npages); |
| } |
| |
| /** |
| * pvrdma_post_send - post send work request entries on a QP |
| * @ibqp: the QP |
| * @wr: work request list to post |
| * @bad_wr: the first bad WR returned |
| * |
| * @return: 0 on success, otherwise errno returned. |
| */ |
| int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, |
| const struct ib_send_wr **bad_wr) |
| { |
| struct pvrdma_qp *qp = to_vqp(ibqp); |
| struct pvrdma_dev *dev = to_vdev(ibqp->device); |
| unsigned long flags; |
| struct pvrdma_sq_wqe_hdr *wqe_hdr; |
| struct pvrdma_sge *sge; |
| int i, ret; |
| |
| /* |
| * In states lower than RTS, we can fail immediately. In other states, |
| * just post and let the device figure it out. |
| */ |
| if (qp->state < IB_QPS_RTS) { |
| *bad_wr = wr; |
| return -EINVAL; |
| } |
| |
| spin_lock_irqsave(&qp->sq.lock, flags); |
| |
| while (wr) { |
| unsigned int tail = 0; |
| |
| if (unlikely(!pvrdma_idx_ring_has_space( |
| qp->sq.ring, qp->sq.wqe_cnt, &tail))) { |
| dev_warn_ratelimited(&dev->pdev->dev, |
| "send queue is full\n"); |
| *bad_wr = wr; |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) { |
| dev_warn_ratelimited(&dev->pdev->dev, |
| "send SGE overflow\n"); |
| *bad_wr = wr; |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (unlikely(wr->opcode < 0)) { |
| dev_warn_ratelimited(&dev->pdev->dev, |
| "invalid send opcode\n"); |
| *bad_wr = wr; |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| /* |
| * Only support UD, RC. |
| * Need to check opcode table for thorough checking. |
| * opcode _UD _UC _RC |
| * _SEND x x x |
| * _SEND_WITH_IMM x x x |
| * _RDMA_WRITE x x |
| * _RDMA_WRITE_WITH_IMM x x |
| * _LOCAL_INV x x |
| * _SEND_WITH_INV x x |
| * _RDMA_READ x |
| * _ATOMIC_CMP_AND_SWP x |
| * _ATOMIC_FETCH_AND_ADD x |
| * _MASK_ATOMIC_CMP_AND_SWP x |
| * _MASK_ATOMIC_FETCH_AND_ADD x |
| * _REG_MR x |
| * |
| */ |
| if (qp->ibqp.qp_type != IB_QPT_UD && |
| qp->ibqp.qp_type != IB_QPT_RC && |
| wr->opcode != IB_WR_SEND) { |
| dev_warn_ratelimited(&dev->pdev->dev, |
| "unsupported queuepair type\n"); |
| *bad_wr = wr; |
| ret = -EINVAL; |
| goto out; |
| } else if (qp->ibqp.qp_type == IB_QPT_UD || |
| qp->ibqp.qp_type == IB_QPT_GSI) { |
| if (wr->opcode != IB_WR_SEND && |
| wr->opcode != IB_WR_SEND_WITH_IMM) { |
| dev_warn_ratelimited(&dev->pdev->dev, |
| "invalid send opcode\n"); |
| *bad_wr = wr; |
| ret = -EINVAL; |
| goto out; |
| } |
| } |
| |
| wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail); |
| memset(wqe_hdr, 0, sizeof(*wqe_hdr)); |
| wqe_hdr->wr_id = wr->wr_id; |
| wqe_hdr->num_sge = wr->num_sge; |
| wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode); |
| wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags); |
| if (wr->opcode == IB_WR_SEND_WITH_IMM || |
| wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) |
| wqe_hdr->ex.imm_data = wr->ex.imm_data; |
| |
| if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) { |
| *bad_wr = wr; |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| switch (qp->ibqp.qp_type) { |
| case IB_QPT_GSI: |
| case IB_QPT_UD: |
| if (unlikely(!ud_wr(wr)->ah)) { |
| dev_warn_ratelimited(&dev->pdev->dev, |
| "invalid address handle\n"); |
| *bad_wr = wr; |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| /* |
| * Use qkey from qp context if high order bit set, |
| * otherwise from work request. |
| */ |
| wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn; |
| wqe_hdr->wr.ud.remote_qkey = |
| ud_wr(wr)->remote_qkey & 0x80000000 ? |
| qp->qkey : ud_wr(wr)->remote_qkey; |
| wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av; |
| |
| break; |
| case IB_QPT_RC: |
| switch (wr->opcode) { |
| case IB_WR_RDMA_READ: |
| case IB_WR_RDMA_WRITE: |
| case IB_WR_RDMA_WRITE_WITH_IMM: |
| wqe_hdr->wr.rdma.remote_addr = |
| rdma_wr(wr)->remote_addr; |
| wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey; |
| break; |
| case IB_WR_LOCAL_INV: |
| case IB_WR_SEND_WITH_INV: |
| wqe_hdr->ex.invalidate_rkey = |
| wr->ex.invalidate_rkey; |
| break; |
| case IB_WR_ATOMIC_CMP_AND_SWP: |
| case IB_WR_ATOMIC_FETCH_AND_ADD: |
| wqe_hdr->wr.atomic.remote_addr = |
| atomic_wr(wr)->remote_addr; |
| wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey; |
| wqe_hdr->wr.atomic.compare_add = |
| atomic_wr(wr)->compare_add; |
| if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) |
| wqe_hdr->wr.atomic.swap = |
| atomic_wr(wr)->swap; |
| break; |
| case IB_WR_REG_MR: |
| ret = set_reg_seg(wqe_hdr, reg_wr(wr)); |
| if (ret < 0) { |
| dev_warn_ratelimited(&dev->pdev->dev, |
| "Failed to set fast register work request\n"); |
| *bad_wr = wr; |
| goto out; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| break; |
| default: |
| dev_warn_ratelimited(&dev->pdev->dev, |
| "invalid queuepair type\n"); |
| ret = -EINVAL; |
| *bad_wr = wr; |
| goto out; |
| } |
| |
| sge = (struct pvrdma_sge *)(wqe_hdr + 1); |
| for (i = 0; i < wr->num_sge; i++) { |
| /* Need to check wqe_size 0 or max size */ |
| sge->addr = wr->sg_list[i].addr; |
| sge->length = wr->sg_list[i].length; |
| sge->lkey = wr->sg_list[i].lkey; |
| sge++; |
| } |
| |
| /* Make sure wqe is written before index update */ |
| smp_wmb(); |
| |
| /* Update shared sq ring */ |
| pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail, |
| qp->sq.wqe_cnt); |
| |
| wr = wr->next; |
| } |
| |
| ret = 0; |
| |
| out: |
| spin_unlock_irqrestore(&qp->sq.lock, flags); |
| |
| if (!ret) |
| pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle); |
| |
| return ret; |
| } |
| |
| /** |
| * pvrdma_post_receive - post receive work request entries on a QP |
| * @ibqp: the QP |
| * @wr: the work request list to post |
| * @bad_wr: the first bad WR returned |
| * |
| * @return: 0 on success, otherwise errno returned. |
| */ |
| int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, |
| const struct ib_recv_wr **bad_wr) |
| { |
| struct pvrdma_dev *dev = to_vdev(ibqp->device); |
| unsigned long flags; |
| struct pvrdma_qp *qp = to_vqp(ibqp); |
| struct pvrdma_rq_wqe_hdr *wqe_hdr; |
| struct pvrdma_sge *sge; |
| int ret = 0; |
| int i; |
| |
| /* |
| * In the RESET state, we can fail immediately. For other states, |
| * just post and let the device figure it out. |
| */ |
| if (qp->state == IB_QPS_RESET) { |
| *bad_wr = wr; |
| return -EINVAL; |
| } |
| |
| if (qp->srq) { |
| dev_warn(&dev->pdev->dev, "QP associated with SRQ\n"); |
| *bad_wr = wr; |
| return -EINVAL; |
| } |
| |
| spin_lock_irqsave(&qp->rq.lock, flags); |
| |
| while (wr) { |
| unsigned int tail = 0; |
| |
| if (unlikely(wr->num_sge > qp->rq.max_sg || |
| wr->num_sge < 0)) { |
| ret = -EINVAL; |
| *bad_wr = wr; |
| dev_warn_ratelimited(&dev->pdev->dev, |
| "recv SGE overflow\n"); |
| goto out; |
| } |
| |
| if (unlikely(!pvrdma_idx_ring_has_space( |
| qp->rq.ring, qp->rq.wqe_cnt, &tail))) { |
| ret = -ENOMEM; |
| *bad_wr = wr; |
| dev_warn_ratelimited(&dev->pdev->dev, |
| "recv queue full\n"); |
| goto out; |
| } |
| |
| wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail); |
| wqe_hdr->wr_id = wr->wr_id; |
| wqe_hdr->num_sge = wr->num_sge; |
| wqe_hdr->total_len = 0; |
| |
| sge = (struct pvrdma_sge *)(wqe_hdr + 1); |
| for (i = 0; i < wr->num_sge; i++) { |
| sge->addr = wr->sg_list[i].addr; |
| sge->length = wr->sg_list[i].length; |
| sge->lkey = wr->sg_list[i].lkey; |
| sge++; |
| } |
| |
| /* Make sure wqe is written before index update */ |
| smp_wmb(); |
| |
| /* Update shared rq ring */ |
| pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail, |
| qp->rq.wqe_cnt); |
| |
| wr = wr->next; |
| } |
| |
| spin_unlock_irqrestore(&qp->rq.lock, flags); |
| |
| pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle); |
| |
| return ret; |
| |
| out: |
| spin_unlock_irqrestore(&qp->rq.lock, flags); |
| |
| return ret; |
| } |
| |
| /** |
| * pvrdma_query_qp - query a queue pair's attributes |
| * @ibqp: the queue pair to query |
| * @attr: the queue pair's attributes |
| * @attr_mask: attributes mask |
| * @init_attr: initial queue pair attributes |
| * |
| * @returns 0 on success, otherwise returns an errno. |
| */ |
| int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, |
| int attr_mask, struct ib_qp_init_attr *init_attr) |
| { |
| struct pvrdma_dev *dev = to_vdev(ibqp->device); |
| struct pvrdma_qp *qp = to_vqp(ibqp); |
| union pvrdma_cmd_req req; |
| union pvrdma_cmd_resp rsp; |
| struct pvrdma_cmd_query_qp *cmd = &req.query_qp; |
| struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp; |
| int ret = 0; |
| |
| mutex_lock(&qp->mutex); |
| |
| if (qp->state == IB_QPS_RESET) { |
| attr->qp_state = IB_QPS_RESET; |
| goto out; |
| } |
| |
| memset(cmd, 0, sizeof(*cmd)); |
| cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP; |
| cmd->qp_handle = qp->qp_handle; |
| cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask); |
| |
| ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP); |
| if (ret < 0) { |
| dev_warn(&dev->pdev->dev, |
| "could not query queuepair, error: %d\n", ret); |
| goto out; |
| } |
| |
| attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state); |
| attr->cur_qp_state = |
| pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state); |
| attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu); |
| attr->path_mig_state = |
| pvrdma_mig_state_to_ib(resp->attrs.path_mig_state); |
| attr->qkey = resp->attrs.qkey; |
| attr->rq_psn = resp->attrs.rq_psn; |
| attr->sq_psn = resp->attrs.sq_psn; |
| attr->dest_qp_num = resp->attrs.dest_qp_num; |
| attr->qp_access_flags = |
| pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags); |
| attr->pkey_index = resp->attrs.pkey_index; |
| attr->alt_pkey_index = resp->attrs.alt_pkey_index; |
| attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify; |
| attr->sq_draining = resp->attrs.sq_draining; |
| attr->max_rd_atomic = resp->attrs.max_rd_atomic; |
| attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic; |
| attr->min_rnr_timer = resp->attrs.min_rnr_timer; |
| attr->port_num = resp->attrs.port_num; |
| attr->timeout = resp->attrs.timeout; |
| attr->retry_cnt = resp->attrs.retry_cnt; |
| attr->rnr_retry = resp->attrs.rnr_retry; |
| attr->alt_port_num = resp->attrs.alt_port_num; |
| attr->alt_timeout = resp->attrs.alt_timeout; |
| pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap); |
| pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr); |
| pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr); |
| |
| qp->state = attr->qp_state; |
| |
| ret = 0; |
| |
| out: |
| attr->cur_qp_state = attr->qp_state; |
| |
| init_attr->event_handler = qp->ibqp.event_handler; |
| init_attr->qp_context = qp->ibqp.qp_context; |
| init_attr->send_cq = qp->ibqp.send_cq; |
| init_attr->recv_cq = qp->ibqp.recv_cq; |
| init_attr->srq = qp->ibqp.srq; |
| init_attr->xrcd = NULL; |
| init_attr->cap = attr->cap; |
| init_attr->sq_sig_type = 0; |
| init_attr->qp_type = qp->ibqp.qp_type; |
| init_attr->create_flags = 0; |
| init_attr->port_num = qp->port; |
| |
| mutex_unlock(&qp->mutex); |
| return ret; |
| } |