2 * Copyright (c) 2012-2016 VMware, Inc. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of EITHER the GNU General Public License
6 * version 2 as published by the Free Software Foundation or the BSD
7 * 2-Clause License. This program is distributed in the hope that it
8 * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED
9 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
10 * See the GNU General Public License version 2 for more details at
11 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
13 * You should have received a copy of the GNU General Public License
14 * along with this program available in the file COPYING in the main
15 * directory of this source tree.
17 * The BSD 2-Clause License
19 * Redistribution and use in source and binary forms, with or
20 * without modification, are permitted provided that the following
23 * - Redistributions of source code must retain the above
24 * copyright notice, this list of conditions and the following
27 * - Redistributions in binary form must reproduce the above
28 * copyright notice, this list of conditions and the following
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32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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39 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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41 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 #include <linux/wait.h>
49 #include <rdma/ib_addr.h>
50 #include <rdma/ib_smi.h>
51 #include <rdma/ib_user_verbs.h>
55 static inline void get_cqs(struct pvrdma_qp *qp, struct pvrdma_cq **send_cq,
56 struct pvrdma_cq **recv_cq)
58 *send_cq = to_vcq(qp->ibqp.send_cq);
59 *recv_cq = to_vcq(qp->ibqp.recv_cq);
62 static void pvrdma_lock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq,
63 unsigned long *scq_flags,
64 unsigned long *rcq_flags)
65 __acquires(scq->cq_lock) __acquires(rcq->cq_lock)
68 spin_lock_irqsave(&scq->cq_lock, *scq_flags);
69 __acquire(rcq->cq_lock);
70 } else if (scq->cq_handle < rcq->cq_handle) {
71 spin_lock_irqsave(&scq->cq_lock, *scq_flags);
72 spin_lock_irqsave_nested(&rcq->cq_lock, *rcq_flags,
73 SINGLE_DEPTH_NESTING);
75 spin_lock_irqsave(&rcq->cq_lock, *rcq_flags);
76 spin_lock_irqsave_nested(&scq->cq_lock, *scq_flags,
77 SINGLE_DEPTH_NESTING);
81 static void pvrdma_unlock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq,
82 unsigned long *scq_flags,
83 unsigned long *rcq_flags)
84 __releases(scq->cq_lock) __releases(rcq->cq_lock)
87 __release(rcq->cq_lock);
88 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
89 } else if (scq->cq_handle < rcq->cq_handle) {
90 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
91 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
93 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
94 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
98 static void pvrdma_reset_qp(struct pvrdma_qp *qp)
100 struct pvrdma_cq *scq, *rcq;
101 unsigned long scq_flags, rcq_flags;
104 get_cqs(qp, &scq, &rcq);
105 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
107 _pvrdma_flush_cqe(qp, scq);
109 _pvrdma_flush_cqe(qp, rcq);
111 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
114 * Reset queuepair. The checks are because usermode queuepairs won't
115 * have kernel ringstates.
118 atomic_set(&qp->rq.ring->cons_head, 0);
119 atomic_set(&qp->rq.ring->prod_tail, 0);
122 atomic_set(&qp->sq.ring->cons_head, 0);
123 atomic_set(&qp->sq.ring->prod_tail, 0);
127 static int pvrdma_set_rq_size(struct pvrdma_dev *dev,
128 struct ib_qp_cap *req_cap,
129 struct pvrdma_qp *qp)
131 if (req_cap->max_recv_wr > dev->dsr->caps.max_qp_wr ||
132 req_cap->max_recv_sge > dev->dsr->caps.max_sge) {
133 dev_warn(&dev->pdev->dev, "recv queue size invalid\n");
137 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_recv_wr));
138 qp->rq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_recv_sge));
141 req_cap->max_recv_wr = qp->rq.wqe_cnt;
142 req_cap->max_recv_sge = qp->rq.max_sg;
144 qp->rq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_rq_wqe_hdr) +
145 sizeof(struct pvrdma_sge) *
147 qp->npages_recv = (qp->rq.wqe_cnt * qp->rq.wqe_size + PAGE_SIZE - 1) /
153 static int pvrdma_set_sq_size(struct pvrdma_dev *dev, struct ib_qp_cap *req_cap,
154 struct pvrdma_qp *qp)
156 if (req_cap->max_send_wr > dev->dsr->caps.max_qp_wr ||
157 req_cap->max_send_sge > dev->dsr->caps.max_sge) {
158 dev_warn(&dev->pdev->dev, "send queue size invalid\n");
162 qp->sq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_send_wr));
163 qp->sq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_send_sge));
166 req_cap->max_send_wr = qp->sq.wqe_cnt;
167 req_cap->max_send_sge = qp->sq.max_sg;
169 qp->sq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_sq_wqe_hdr) +
170 sizeof(struct pvrdma_sge) *
172 /* Note: one extra page for the header. */
173 qp->npages_send = PVRDMA_QP_NUM_HEADER_PAGES +
174 (qp->sq.wqe_cnt * qp->sq.wqe_size + PAGE_SIZE - 1) /
181 * pvrdma_create_qp - create queue pair
182 * @pd: protection domain
183 * @init_attr: queue pair attributes
186 * @return: the ib_qp pointer on success, otherwise returns an errno.
188 struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
189 struct ib_qp_init_attr *init_attr,
190 struct ib_udata *udata)
192 struct pvrdma_qp *qp = NULL;
193 struct pvrdma_dev *dev = to_vdev(pd->device);
194 union pvrdma_cmd_req req;
195 union pvrdma_cmd_resp rsp;
196 struct pvrdma_cmd_create_qp *cmd = &req.create_qp;
197 struct pvrdma_cmd_create_qp_resp *resp = &rsp.create_qp_resp;
198 struct pvrdma_create_qp ucmd;
201 bool is_srq = !!init_attr->srq;
203 if (init_attr->create_flags) {
204 dev_warn(&dev->pdev->dev,
205 "invalid create queuepair flags %#x\n",
206 init_attr->create_flags);
207 return ERR_PTR(-EINVAL);
210 if (init_attr->qp_type != IB_QPT_RC &&
211 init_attr->qp_type != IB_QPT_UD &&
212 init_attr->qp_type != IB_QPT_GSI) {
213 dev_warn(&dev->pdev->dev, "queuepair type %d not supported\n",
215 return ERR_PTR(-EINVAL);
218 if (is_srq && !dev->dsr->caps.max_srq) {
219 dev_warn(&dev->pdev->dev,
220 "SRQs not supported by device\n");
221 return ERR_PTR(-EINVAL);
224 if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp))
225 return ERR_PTR(-ENOMEM);
227 switch (init_attr->qp_type) {
229 if (init_attr->port_num == 0 ||
230 init_attr->port_num > pd->device->phys_port_cnt ||
232 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n");
239 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
245 spin_lock_init(&qp->sq.lock);
246 spin_lock_init(&qp->rq.lock);
247 mutex_init(&qp->mutex);
248 refcount_set(&qp->refcnt, 1);
249 init_completion(&qp->free);
251 qp->state = IB_QPS_RESET;
252 qp->is_kernel = !udata;
254 if (!qp->is_kernel) {
255 dev_dbg(&dev->pdev->dev,
256 "create queuepair from user space\n");
258 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
264 /* set qp->sq.wqe_cnt, shift, buf_size.. */
265 qp->rumem = ib_umem_get(udata, ucmd.rbuf_addr,
266 ucmd.rbuf_size, 0, 0);
267 if (IS_ERR(qp->rumem)) {
268 ret = PTR_ERR(qp->rumem);
274 qp->srq = to_vsrq(init_attr->srq);
277 qp->sumem = ib_umem_get(udata, ucmd.sbuf_addr,
278 ucmd.sbuf_size, 0, 0);
279 if (IS_ERR(qp->sumem)) {
281 ib_umem_release(qp->rumem);
282 ret = PTR_ERR(qp->sumem);
286 qp->npages_send = ib_umem_page_count(qp->sumem);
288 qp->npages_recv = ib_umem_page_count(qp->rumem);
291 qp->npages = qp->npages_send + qp->npages_recv;
293 ret = pvrdma_set_sq_size(to_vdev(pd->device),
294 &init_attr->cap, qp);
298 ret = pvrdma_set_rq_size(to_vdev(pd->device),
299 &init_attr->cap, qp);
303 qp->npages = qp->npages_send + qp->npages_recv;
305 /* Skip header page. */
306 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE;
308 /* Recv queue pages are after send pages. */
309 qp->rq.offset = qp->npages_send * PAGE_SIZE;
312 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
313 dev_warn(&dev->pdev->dev,
314 "overflow pages in queuepair\n");
319 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages,
322 dev_warn(&dev->pdev->dev,
323 "could not allocate page directory\n");
327 if (!qp->is_kernel) {
328 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0);
330 pvrdma_page_dir_insert_umem(&qp->pdir,
334 /* Ring state is always the first page. */
335 qp->sq.ring = qp->pdir.pages[0];
336 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1];
345 init_attr->cap.max_inline_data = 0;
347 memset(cmd, 0, sizeof(*cmd));
348 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP;
349 cmd->pd_handle = to_vpd(pd)->pd_handle;
350 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle;
351 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle;
353 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle;
356 cmd->max_send_wr = init_attr->cap.max_send_wr;
357 cmd->max_recv_wr = init_attr->cap.max_recv_wr;
358 cmd->max_send_sge = init_attr->cap.max_send_sge;
359 cmd->max_recv_sge = init_attr->cap.max_recv_sge;
360 cmd->max_inline_data = init_attr->cap.max_inline_data;
361 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
362 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type);
363 cmd->is_srq = is_srq;
365 cmd->access_flags = IB_ACCESS_LOCAL_WRITE;
366 cmd->total_chunks = qp->npages;
367 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES;
368 cmd->pdir_dma = qp->pdir.dir_dma;
370 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n",
371 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge,
374 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP);
376 dev_warn(&dev->pdev->dev,
377 "could not create queuepair, error: %d\n", ret);
381 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */
382 qp->qp_handle = resp->qpn;
383 qp->port = init_attr->port_num;
384 qp->ibqp.qp_num = resp->qpn;
385 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
386 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp;
387 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
392 pvrdma_page_dir_cleanup(dev, &qp->pdir);
394 if (!qp->is_kernel) {
396 ib_umem_release(qp->rumem);
398 ib_umem_release(qp->sumem);
402 atomic_dec(&dev->num_qps);
407 static void pvrdma_free_qp(struct pvrdma_qp *qp)
409 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device);
410 struct pvrdma_cq *scq;
411 struct pvrdma_cq *rcq;
412 unsigned long flags, scq_flags, rcq_flags;
414 /* In case cq is polling */
415 get_cqs(qp, &scq, &rcq);
416 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
418 _pvrdma_flush_cqe(qp, scq);
420 _pvrdma_flush_cqe(qp, rcq);
422 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
423 dev->qp_tbl[qp->qp_handle] = NULL;
424 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
426 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
428 if (refcount_dec_and_test(&qp->refcnt))
430 wait_for_completion(&qp->free);
432 if (!qp->is_kernel) {
434 ib_umem_release(qp->rumem);
436 ib_umem_release(qp->sumem);
439 pvrdma_page_dir_cleanup(dev, &qp->pdir);
443 atomic_dec(&dev->num_qps);
447 * pvrdma_destroy_qp - destroy a queue pair
448 * @qp: the queue pair to destroy
449 * @udata: user data or null for kernel object
451 * @return: 0 on success.
453 int pvrdma_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
455 struct pvrdma_qp *vqp = to_vqp(qp);
456 union pvrdma_cmd_req req;
457 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp;
460 memset(cmd, 0, sizeof(*cmd));
461 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP;
462 cmd->qp_handle = vqp->qp_handle;
464 ret = pvrdma_cmd_post(to_vdev(qp->device), &req, NULL, 0);
466 dev_warn(&to_vdev(qp->device)->pdev->dev,
467 "destroy queuepair failed, error: %d\n", ret);
475 * pvrdma_modify_qp - modify queue pair attributes
476 * @ibqp: the queue pair
477 * @attr: the new queue pair's attributes
478 * @attr_mask: attributes mask
481 * @returns 0 on success, otherwise returns an errno.
483 int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
484 int attr_mask, struct ib_udata *udata)
486 struct pvrdma_dev *dev = to_vdev(ibqp->device);
487 struct pvrdma_qp *qp = to_vqp(ibqp);
488 union pvrdma_cmd_req req;
489 union pvrdma_cmd_resp rsp;
490 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp;
491 enum ib_qp_state cur_state, next_state;
494 /* Sanity checking. Should need lock here */
495 mutex_lock(&qp->mutex);
496 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state :
498 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state;
500 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type,
506 if (attr_mask & IB_QP_PORT) {
507 if (attr->port_num == 0 ||
508 attr->port_num > ibqp->device->phys_port_cnt) {
514 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
515 if (attr->min_rnr_timer > 31) {
521 if (attr_mask & IB_QP_PKEY_INDEX) {
522 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) {
528 if (attr_mask & IB_QP_QKEY)
529 qp->qkey = attr->qkey;
531 if (cur_state == next_state && cur_state == IB_QPS_RESET) {
536 qp->state = next_state;
537 memset(cmd, 0, sizeof(*cmd));
538 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP;
539 cmd->qp_handle = qp->qp_handle;
540 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
541 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state);
542 cmd->attrs.cur_qp_state =
543 ib_qp_state_to_pvrdma(attr->cur_qp_state);
544 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu);
545 cmd->attrs.path_mig_state =
546 ib_mig_state_to_pvrdma(attr->path_mig_state);
547 cmd->attrs.qkey = attr->qkey;
548 cmd->attrs.rq_psn = attr->rq_psn;
549 cmd->attrs.sq_psn = attr->sq_psn;
550 cmd->attrs.dest_qp_num = attr->dest_qp_num;
551 cmd->attrs.qp_access_flags =
552 ib_access_flags_to_pvrdma(attr->qp_access_flags);
553 cmd->attrs.pkey_index = attr->pkey_index;
554 cmd->attrs.alt_pkey_index = attr->alt_pkey_index;
555 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify;
556 cmd->attrs.sq_draining = attr->sq_draining;
557 cmd->attrs.max_rd_atomic = attr->max_rd_atomic;
558 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic;
559 cmd->attrs.min_rnr_timer = attr->min_rnr_timer;
560 cmd->attrs.port_num = attr->port_num;
561 cmd->attrs.timeout = attr->timeout;
562 cmd->attrs.retry_cnt = attr->retry_cnt;
563 cmd->attrs.rnr_retry = attr->rnr_retry;
564 cmd->attrs.alt_port_num = attr->alt_port_num;
565 cmd->attrs.alt_timeout = attr->alt_timeout;
566 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap);
567 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr);
568 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr);
570 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP);
572 dev_warn(&dev->pdev->dev,
573 "could not modify queuepair, error: %d\n", ret);
574 } else if (rsp.hdr.err > 0) {
575 dev_warn(&dev->pdev->dev,
576 "cannot modify queuepair, error: %d\n", rsp.hdr.err);
580 if (ret == 0 && next_state == IB_QPS_RESET)
584 mutex_unlock(&qp->mutex);
589 static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n)
591 return pvrdma_page_dir_get_ptr(&qp->pdir,
592 qp->sq.offset + n * qp->sq.wqe_size);
595 static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n)
597 return pvrdma_page_dir_get_ptr(&qp->pdir,
598 qp->rq.offset + n * qp->rq.wqe_size);
601 static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr,
602 const struct ib_reg_wr *wr)
604 struct pvrdma_user_mr *mr = to_vmr(wr->mr);
606 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova;
607 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma;
608 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift;
609 wqe_hdr->wr.fast_reg.page_list_len = mr->npages;
610 wqe_hdr->wr.fast_reg.length = mr->ibmr.length;
611 wqe_hdr->wr.fast_reg.access_flags = wr->access;
612 wqe_hdr->wr.fast_reg.rkey = wr->key;
614 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages,
619 * pvrdma_post_send - post send work request entries on a QP
621 * @wr: work request list to post
622 * @bad_wr: the first bad WR returned
624 * @return: 0 on success, otherwise errno returned.
626 int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
627 const struct ib_send_wr **bad_wr)
629 struct pvrdma_qp *qp = to_vqp(ibqp);
630 struct pvrdma_dev *dev = to_vdev(ibqp->device);
632 struct pvrdma_sq_wqe_hdr *wqe_hdr;
633 struct pvrdma_sge *sge;
637 * In states lower than RTS, we can fail immediately. In other states,
638 * just post and let the device figure it out.
640 if (qp->state < IB_QPS_RTS) {
645 spin_lock_irqsave(&qp->sq.lock, flags);
648 unsigned int tail = 0;
650 if (unlikely(!pvrdma_idx_ring_has_space(
651 qp->sq.ring, qp->sq.wqe_cnt, &tail))) {
652 dev_warn_ratelimited(&dev->pdev->dev,
653 "send queue is full\n");
659 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) {
660 dev_warn_ratelimited(&dev->pdev->dev,
661 "send SGE overflow\n");
667 if (unlikely(wr->opcode < 0)) {
668 dev_warn_ratelimited(&dev->pdev->dev,
669 "invalid send opcode\n");
676 * Only support UD, RC.
677 * Need to check opcode table for thorough checking.
680 * _SEND_WITH_IMM x x x
682 * _RDMA_WRITE_WITH_IMM x x
686 * _ATOMIC_CMP_AND_SWP x
687 * _ATOMIC_FETCH_AND_ADD x
688 * _MASK_ATOMIC_CMP_AND_SWP x
689 * _MASK_ATOMIC_FETCH_AND_ADD x
693 if (qp->ibqp.qp_type != IB_QPT_UD &&
694 qp->ibqp.qp_type != IB_QPT_RC &&
695 wr->opcode != IB_WR_SEND) {
696 dev_warn_ratelimited(&dev->pdev->dev,
697 "unsupported queuepair type\n");
701 } else if (qp->ibqp.qp_type == IB_QPT_UD ||
702 qp->ibqp.qp_type == IB_QPT_GSI) {
703 if (wr->opcode != IB_WR_SEND &&
704 wr->opcode != IB_WR_SEND_WITH_IMM) {
705 dev_warn_ratelimited(&dev->pdev->dev,
706 "invalid send opcode\n");
713 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail);
714 memset(wqe_hdr, 0, sizeof(*wqe_hdr));
715 wqe_hdr->wr_id = wr->wr_id;
716 wqe_hdr->num_sge = wr->num_sge;
717 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode);
718 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags);
719 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
720 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
721 wqe_hdr->ex.imm_data = wr->ex.imm_data;
723 if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) {
729 switch (qp->ibqp.qp_type) {
732 if (unlikely(!ud_wr(wr)->ah)) {
733 dev_warn_ratelimited(&dev->pdev->dev,
734 "invalid address handle\n");
741 * Use qkey from qp context if high order bit set,
742 * otherwise from work request.
744 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn;
745 wqe_hdr->wr.ud.remote_qkey =
746 ud_wr(wr)->remote_qkey & 0x80000000 ?
747 qp->qkey : ud_wr(wr)->remote_qkey;
748 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av;
752 switch (wr->opcode) {
753 case IB_WR_RDMA_READ:
754 case IB_WR_RDMA_WRITE:
755 case IB_WR_RDMA_WRITE_WITH_IMM:
756 wqe_hdr->wr.rdma.remote_addr =
757 rdma_wr(wr)->remote_addr;
758 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey;
760 case IB_WR_LOCAL_INV:
761 case IB_WR_SEND_WITH_INV:
762 wqe_hdr->ex.invalidate_rkey =
763 wr->ex.invalidate_rkey;
765 case IB_WR_ATOMIC_CMP_AND_SWP:
766 case IB_WR_ATOMIC_FETCH_AND_ADD:
767 wqe_hdr->wr.atomic.remote_addr =
768 atomic_wr(wr)->remote_addr;
769 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey;
770 wqe_hdr->wr.atomic.compare_add =
771 atomic_wr(wr)->compare_add;
772 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP)
773 wqe_hdr->wr.atomic.swap =
777 ret = set_reg_seg(wqe_hdr, reg_wr(wr));
779 dev_warn_ratelimited(&dev->pdev->dev,
780 "Failed to set fast register work request\n");
791 dev_warn_ratelimited(&dev->pdev->dev,
792 "invalid queuepair type\n");
798 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
799 for (i = 0; i < wr->num_sge; i++) {
800 /* Need to check wqe_size 0 or max size */
801 sge->addr = wr->sg_list[i].addr;
802 sge->length = wr->sg_list[i].length;
803 sge->lkey = wr->sg_list[i].lkey;
807 /* Make sure wqe is written before index update */
810 /* Update shared sq ring */
811 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail,
820 spin_unlock_irqrestore(&qp->sq.lock, flags);
823 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle);
829 * pvrdma_post_receive - post receive work request entries on a QP
831 * @wr: the work request list to post
832 * @bad_wr: the first bad WR returned
834 * @return: 0 on success, otherwise errno returned.
836 int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
837 const struct ib_recv_wr **bad_wr)
839 struct pvrdma_dev *dev = to_vdev(ibqp->device);
841 struct pvrdma_qp *qp = to_vqp(ibqp);
842 struct pvrdma_rq_wqe_hdr *wqe_hdr;
843 struct pvrdma_sge *sge;
848 * In the RESET state, we can fail immediately. For other states,
849 * just post and let the device figure it out.
851 if (qp->state == IB_QPS_RESET) {
857 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n");
862 spin_lock_irqsave(&qp->rq.lock, flags);
865 unsigned int tail = 0;
867 if (unlikely(wr->num_sge > qp->rq.max_sg ||
871 dev_warn_ratelimited(&dev->pdev->dev,
872 "recv SGE overflow\n");
876 if (unlikely(!pvrdma_idx_ring_has_space(
877 qp->rq.ring, qp->rq.wqe_cnt, &tail))) {
880 dev_warn_ratelimited(&dev->pdev->dev,
881 "recv queue full\n");
885 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail);
886 wqe_hdr->wr_id = wr->wr_id;
887 wqe_hdr->num_sge = wr->num_sge;
888 wqe_hdr->total_len = 0;
890 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
891 for (i = 0; i < wr->num_sge; i++) {
892 sge->addr = wr->sg_list[i].addr;
893 sge->length = wr->sg_list[i].length;
894 sge->lkey = wr->sg_list[i].lkey;
898 /* Make sure wqe is written before index update */
901 /* Update shared rq ring */
902 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail,
908 spin_unlock_irqrestore(&qp->rq.lock, flags);
910 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle);
915 spin_unlock_irqrestore(&qp->rq.lock, flags);
921 * pvrdma_query_qp - query a queue pair's attributes
922 * @ibqp: the queue pair to query
923 * @attr: the queue pair's attributes
924 * @attr_mask: attributes mask
925 * @init_attr: initial queue pair attributes
927 * @returns 0 on success, otherwise returns an errno.
929 int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
930 int attr_mask, struct ib_qp_init_attr *init_attr)
932 struct pvrdma_dev *dev = to_vdev(ibqp->device);
933 struct pvrdma_qp *qp = to_vqp(ibqp);
934 union pvrdma_cmd_req req;
935 union pvrdma_cmd_resp rsp;
936 struct pvrdma_cmd_query_qp *cmd = &req.query_qp;
937 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp;
940 mutex_lock(&qp->mutex);
942 if (qp->state == IB_QPS_RESET) {
943 attr->qp_state = IB_QPS_RESET;
947 memset(cmd, 0, sizeof(*cmd));
948 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP;
949 cmd->qp_handle = qp->qp_handle;
950 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
952 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP);
954 dev_warn(&dev->pdev->dev,
955 "could not query queuepair, error: %d\n", ret);
959 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state);
961 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state);
962 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu);
963 attr->path_mig_state =
964 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state);
965 attr->qkey = resp->attrs.qkey;
966 attr->rq_psn = resp->attrs.rq_psn;
967 attr->sq_psn = resp->attrs.sq_psn;
968 attr->dest_qp_num = resp->attrs.dest_qp_num;
969 attr->qp_access_flags =
970 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags);
971 attr->pkey_index = resp->attrs.pkey_index;
972 attr->alt_pkey_index = resp->attrs.alt_pkey_index;
973 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify;
974 attr->sq_draining = resp->attrs.sq_draining;
975 attr->max_rd_atomic = resp->attrs.max_rd_atomic;
976 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic;
977 attr->min_rnr_timer = resp->attrs.min_rnr_timer;
978 attr->port_num = resp->attrs.port_num;
979 attr->timeout = resp->attrs.timeout;
980 attr->retry_cnt = resp->attrs.retry_cnt;
981 attr->rnr_retry = resp->attrs.rnr_retry;
982 attr->alt_port_num = resp->attrs.alt_port_num;
983 attr->alt_timeout = resp->attrs.alt_timeout;
984 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap);
985 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr);
986 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr);
988 qp->state = attr->qp_state;
993 attr->cur_qp_state = attr->qp_state;
995 init_attr->event_handler = qp->ibqp.event_handler;
996 init_attr->qp_context = qp->ibqp.qp_context;
997 init_attr->send_cq = qp->ibqp.send_cq;
998 init_attr->recv_cq = qp->ibqp.recv_cq;
999 init_attr->srq = qp->ibqp.srq;
1000 init_attr->xrcd = NULL;
1001 init_attr->cap = attr->cap;
1002 init_attr->sq_sig_type = 0;
1003 init_attr->qp_type = qp->ibqp.qp_type;
1004 init_attr->create_flags = 0;
1005 init_attr->port_num = qp->port;
1007 mutex_unlock(&qp->mutex);