/* * 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 #include #include #include #include #include #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 = !(pd->uobject && 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, IB_LINK_LAYER_ETHERNET)) { 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; }