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- /*
- * 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 = !(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;
- }
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