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[mirror_ubuntu-disco-kernel.git] / drivers / infiniband / hw / vmw_pvrdma / pvrdma_qp.c
1 /*
2 * Copyright (c) 2012-2016 VMware, Inc. All rights reserved.
3 *
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.
12 *
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.
16 *
17 * The BSD 2-Clause License
18 *
19 * Redistribution and use in source and binary forms, with or
20 * without modification, are permitted provided that the following
21 * conditions are met:
22 *
23 * - Redistributions of source code must retain the above
24 * copyright notice, this list of conditions and the following
25 * disclaimer.
26 *
27 * - Redistributions in binary form must reproduce the above
28 * copyright notice, this list of conditions and the following
29 * disclaimer in the documentation and/or other materials
30 * provided with the distribution.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
35 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
36 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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.
44 */
45
46 #include <asm/page.h>
47 #include <linux/io.h>
48 #include <linux/wait.h>
49 #include <rdma/ib_addr.h>
50 #include <rdma/ib_smi.h>
51 #include <rdma/ib_user_verbs.h>
52
53 #include "pvrdma.h"
54
55 static inline void get_cqs(struct pvrdma_qp *qp, struct pvrdma_cq **send_cq,
56 struct pvrdma_cq **recv_cq)
57 {
58 *send_cq = to_vcq(qp->ibqp.send_cq);
59 *recv_cq = to_vcq(qp->ibqp.recv_cq);
60 }
61
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)
66 {
67 if (scq == rcq) {
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);
74 } else {
75 spin_lock_irqsave(&rcq->cq_lock, *rcq_flags);
76 spin_lock_irqsave_nested(&scq->cq_lock, *scq_flags,
77 SINGLE_DEPTH_NESTING);
78 }
79 }
80
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)
85 {
86 if (scq == rcq) {
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);
92 } else {
93 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
94 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
95 }
96 }
97
98 static void pvrdma_reset_qp(struct pvrdma_qp *qp)
99 {
100 struct pvrdma_cq *scq, *rcq;
101 unsigned long scq_flags, rcq_flags;
102
103 /* Clean up cqes */
104 get_cqs(qp, &scq, &rcq);
105 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
106
107 _pvrdma_flush_cqe(qp, scq);
108 if (scq != rcq)
109 _pvrdma_flush_cqe(qp, rcq);
110
111 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
112
113 /*
114 * Reset queuepair. The checks are because usermode queuepairs won't
115 * have kernel ringstates.
116 */
117 if (qp->rq.ring) {
118 atomic_set(&qp->rq.ring->cons_head, 0);
119 atomic_set(&qp->rq.ring->prod_tail, 0);
120 }
121 if (qp->sq.ring) {
122 atomic_set(&qp->sq.ring->cons_head, 0);
123 atomic_set(&qp->sq.ring->prod_tail, 0);
124 }
125 }
126
127 static int pvrdma_set_rq_size(struct pvrdma_dev *dev,
128 struct ib_qp_cap *req_cap,
129 struct pvrdma_qp *qp)
130 {
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");
134 return -EINVAL;
135 }
136
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));
139
140 /* Write back */
141 req_cap->max_recv_wr = qp->rq.wqe_cnt;
142 req_cap->max_recv_sge = qp->rq.max_sg;
143
144 qp->rq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_rq_wqe_hdr) +
145 sizeof(struct pvrdma_sge) *
146 qp->rq.max_sg);
147 qp->npages_recv = (qp->rq.wqe_cnt * qp->rq.wqe_size + PAGE_SIZE - 1) /
148 PAGE_SIZE;
149
150 return 0;
151 }
152
153 static int pvrdma_set_sq_size(struct pvrdma_dev *dev, struct ib_qp_cap *req_cap,
154 struct pvrdma_qp *qp)
155 {
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");
159 return -EINVAL;
160 }
161
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));
164
165 /* Write back */
166 req_cap->max_send_wr = qp->sq.wqe_cnt;
167 req_cap->max_send_sge = qp->sq.max_sg;
168
169 qp->sq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_sq_wqe_hdr) +
170 sizeof(struct pvrdma_sge) *
171 qp->sq.max_sg);
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) /
175 PAGE_SIZE;
176
177 return 0;
178 }
179
180 /**
181 * pvrdma_create_qp - create queue pair
182 * @pd: protection domain
183 * @init_attr: queue pair attributes
184 * @udata: user data
185 *
186 * @return: the ib_qp pointer on success, otherwise returns an errno.
187 */
188 struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
189 struct ib_qp_init_attr *init_attr,
190 struct ib_udata *udata)
191 {
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;
199 unsigned long flags;
200 int ret;
201 bool is_srq = !!init_attr->srq;
202
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);
208 }
209
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",
214 init_attr->qp_type);
215 return ERR_PTR(-EINVAL);
216 }
217
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);
222 }
223
224 if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp))
225 return ERR_PTR(-ENOMEM);
226
227 switch (init_attr->qp_type) {
228 case IB_QPT_GSI:
229 if (init_attr->port_num == 0 ||
230 init_attr->port_num > pd->device->phys_port_cnt ||
231 udata) {
232 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n");
233 ret = -EINVAL;
234 goto err_qp;
235 }
236 /* fall through */
237 case IB_QPT_RC:
238 case IB_QPT_UD:
239 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
240 if (!qp) {
241 ret = -ENOMEM;
242 goto err_qp;
243 }
244
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);
250
251 qp->state = IB_QPS_RESET;
252 qp->is_kernel = !udata;
253
254 if (!qp->is_kernel) {
255 dev_dbg(&dev->pdev->dev,
256 "create queuepair from user space\n");
257
258 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
259 ret = -EFAULT;
260 goto err_qp;
261 }
262
263 if (!is_srq) {
264 /* set qp->sq.wqe_cnt, shift, buf_size.. */
265 qp->rumem = ib_umem_get(pd->uobject->context,
266 ucmd.rbuf_addr,
267 ucmd.rbuf_size, 0, 0);
268 if (IS_ERR(qp->rumem)) {
269 ret = PTR_ERR(qp->rumem);
270 goto err_qp;
271 }
272 qp->srq = NULL;
273 } else {
274 qp->rumem = NULL;
275 qp->srq = to_vsrq(init_attr->srq);
276 }
277
278 qp->sumem = ib_umem_get(pd->uobject->context,
279 ucmd.sbuf_addr,
280 ucmd.sbuf_size, 0, 0);
281 if (IS_ERR(qp->sumem)) {
282 if (!is_srq)
283 ib_umem_release(qp->rumem);
284 ret = PTR_ERR(qp->sumem);
285 goto err_qp;
286 }
287
288 qp->npages_send = ib_umem_page_count(qp->sumem);
289 if (!is_srq)
290 qp->npages_recv = ib_umem_page_count(qp->rumem);
291 else
292 qp->npages_recv = 0;
293 qp->npages = qp->npages_send + qp->npages_recv;
294 } else {
295 ret = pvrdma_set_sq_size(to_vdev(pd->device),
296 &init_attr->cap, qp);
297 if (ret)
298 goto err_qp;
299
300 ret = pvrdma_set_rq_size(to_vdev(pd->device),
301 &init_attr->cap, qp);
302 if (ret)
303 goto err_qp;
304
305 qp->npages = qp->npages_send + qp->npages_recv;
306
307 /* Skip header page. */
308 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE;
309
310 /* Recv queue pages are after send pages. */
311 qp->rq.offset = qp->npages_send * PAGE_SIZE;
312 }
313
314 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
315 dev_warn(&dev->pdev->dev,
316 "overflow pages in queuepair\n");
317 ret = -EINVAL;
318 goto err_umem;
319 }
320
321 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages,
322 qp->is_kernel);
323 if (ret) {
324 dev_warn(&dev->pdev->dev,
325 "could not allocate page directory\n");
326 goto err_umem;
327 }
328
329 if (!qp->is_kernel) {
330 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0);
331 if (!is_srq)
332 pvrdma_page_dir_insert_umem(&qp->pdir,
333 qp->rumem,
334 qp->npages_send);
335 } else {
336 /* Ring state is always the first page. */
337 qp->sq.ring = qp->pdir.pages[0];
338 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1];
339 }
340 break;
341 default:
342 ret = -EINVAL;
343 goto err_qp;
344 }
345
346 /* Not supported */
347 init_attr->cap.max_inline_data = 0;
348
349 memset(cmd, 0, sizeof(*cmd));
350 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP;
351 cmd->pd_handle = to_vpd(pd)->pd_handle;
352 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle;
353 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle;
354 if (is_srq)
355 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle;
356 else
357 cmd->srq_handle = 0;
358 cmd->max_send_wr = init_attr->cap.max_send_wr;
359 cmd->max_recv_wr = init_attr->cap.max_recv_wr;
360 cmd->max_send_sge = init_attr->cap.max_send_sge;
361 cmd->max_recv_sge = init_attr->cap.max_recv_sge;
362 cmd->max_inline_data = init_attr->cap.max_inline_data;
363 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
364 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type);
365 cmd->is_srq = is_srq;
366 cmd->lkey = 0;
367 cmd->access_flags = IB_ACCESS_LOCAL_WRITE;
368 cmd->total_chunks = qp->npages;
369 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES;
370 cmd->pdir_dma = qp->pdir.dir_dma;
371
372 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n",
373 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge,
374 cmd->max_recv_sge);
375
376 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP);
377 if (ret < 0) {
378 dev_warn(&dev->pdev->dev,
379 "could not create queuepair, error: %d\n", ret);
380 goto err_pdir;
381 }
382
383 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */
384 qp->qp_handle = resp->qpn;
385 qp->port = init_attr->port_num;
386 qp->ibqp.qp_num = resp->qpn;
387 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
388 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp;
389 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
390
391 return &qp->ibqp;
392
393 err_pdir:
394 pvrdma_page_dir_cleanup(dev, &qp->pdir);
395 err_umem:
396 if (!qp->is_kernel) {
397 if (qp->rumem)
398 ib_umem_release(qp->rumem);
399 if (qp->sumem)
400 ib_umem_release(qp->sumem);
401 }
402 err_qp:
403 kfree(qp);
404 atomic_dec(&dev->num_qps);
405
406 return ERR_PTR(ret);
407 }
408
409 static void pvrdma_free_qp(struct pvrdma_qp *qp)
410 {
411 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device);
412 struct pvrdma_cq *scq;
413 struct pvrdma_cq *rcq;
414 unsigned long flags, scq_flags, rcq_flags;
415
416 /* In case cq is polling */
417 get_cqs(qp, &scq, &rcq);
418 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
419
420 _pvrdma_flush_cqe(qp, scq);
421 if (scq != rcq)
422 _pvrdma_flush_cqe(qp, rcq);
423
424 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
425 dev->qp_tbl[qp->qp_handle] = NULL;
426 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
427
428 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
429
430 if (refcount_dec_and_test(&qp->refcnt))
431 complete(&qp->free);
432 wait_for_completion(&qp->free);
433
434 if (!qp->is_kernel) {
435 if (qp->rumem)
436 ib_umem_release(qp->rumem);
437 if (qp->sumem)
438 ib_umem_release(qp->sumem);
439 }
440
441 pvrdma_page_dir_cleanup(dev, &qp->pdir);
442
443 kfree(qp);
444
445 atomic_dec(&dev->num_qps);
446 }
447
448 /**
449 * pvrdma_destroy_qp - destroy a queue pair
450 * @qp: the queue pair to destroy
451 *
452 * @return: 0 on success.
453 */
454 int pvrdma_destroy_qp(struct ib_qp *qp)
455 {
456 struct pvrdma_qp *vqp = to_vqp(qp);
457 union pvrdma_cmd_req req;
458 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp;
459 int ret;
460
461 memset(cmd, 0, sizeof(*cmd));
462 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP;
463 cmd->qp_handle = vqp->qp_handle;
464
465 ret = pvrdma_cmd_post(to_vdev(qp->device), &req, NULL, 0);
466 if (ret < 0)
467 dev_warn(&to_vdev(qp->device)->pdev->dev,
468 "destroy queuepair failed, error: %d\n", ret);
469
470 pvrdma_free_qp(vqp);
471
472 return 0;
473 }
474
475 /**
476 * pvrdma_modify_qp - modify queue pair attributes
477 * @ibqp: the queue pair
478 * @attr: the new queue pair's attributes
479 * @attr_mask: attributes mask
480 * @udata: user data
481 *
482 * @returns 0 on success, otherwise returns an errno.
483 */
484 int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
485 int attr_mask, struct ib_udata *udata)
486 {
487 struct pvrdma_dev *dev = to_vdev(ibqp->device);
488 struct pvrdma_qp *qp = to_vqp(ibqp);
489 union pvrdma_cmd_req req;
490 union pvrdma_cmd_resp rsp;
491 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp;
492 enum ib_qp_state cur_state, next_state;
493 int ret;
494
495 /* Sanity checking. Should need lock here */
496 mutex_lock(&qp->mutex);
497 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state :
498 qp->state;
499 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state;
500
501 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type,
502 attr_mask)) {
503 ret = -EINVAL;
504 goto out;
505 }
506
507 if (attr_mask & IB_QP_PORT) {
508 if (attr->port_num == 0 ||
509 attr->port_num > ibqp->device->phys_port_cnt) {
510 ret = -EINVAL;
511 goto out;
512 }
513 }
514
515 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
516 if (attr->min_rnr_timer > 31) {
517 ret = -EINVAL;
518 goto out;
519 }
520 }
521
522 if (attr_mask & IB_QP_PKEY_INDEX) {
523 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) {
524 ret = -EINVAL;
525 goto out;
526 }
527 }
528
529 if (attr_mask & IB_QP_QKEY)
530 qp->qkey = attr->qkey;
531
532 if (cur_state == next_state && cur_state == IB_QPS_RESET) {
533 ret = 0;
534 goto out;
535 }
536
537 qp->state = next_state;
538 memset(cmd, 0, sizeof(*cmd));
539 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP;
540 cmd->qp_handle = qp->qp_handle;
541 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
542 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state);
543 cmd->attrs.cur_qp_state =
544 ib_qp_state_to_pvrdma(attr->cur_qp_state);
545 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu);
546 cmd->attrs.path_mig_state =
547 ib_mig_state_to_pvrdma(attr->path_mig_state);
548 cmd->attrs.qkey = attr->qkey;
549 cmd->attrs.rq_psn = attr->rq_psn;
550 cmd->attrs.sq_psn = attr->sq_psn;
551 cmd->attrs.dest_qp_num = attr->dest_qp_num;
552 cmd->attrs.qp_access_flags =
553 ib_access_flags_to_pvrdma(attr->qp_access_flags);
554 cmd->attrs.pkey_index = attr->pkey_index;
555 cmd->attrs.alt_pkey_index = attr->alt_pkey_index;
556 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify;
557 cmd->attrs.sq_draining = attr->sq_draining;
558 cmd->attrs.max_rd_atomic = attr->max_rd_atomic;
559 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic;
560 cmd->attrs.min_rnr_timer = attr->min_rnr_timer;
561 cmd->attrs.port_num = attr->port_num;
562 cmd->attrs.timeout = attr->timeout;
563 cmd->attrs.retry_cnt = attr->retry_cnt;
564 cmd->attrs.rnr_retry = attr->rnr_retry;
565 cmd->attrs.alt_port_num = attr->alt_port_num;
566 cmd->attrs.alt_timeout = attr->alt_timeout;
567 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap);
568 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr);
569 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr);
570
571 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP);
572 if (ret < 0) {
573 dev_warn(&dev->pdev->dev,
574 "could not modify queuepair, error: %d\n", ret);
575 } else if (rsp.hdr.err > 0) {
576 dev_warn(&dev->pdev->dev,
577 "cannot modify queuepair, error: %d\n", rsp.hdr.err);
578 ret = -EINVAL;
579 }
580
581 if (ret == 0 && next_state == IB_QPS_RESET)
582 pvrdma_reset_qp(qp);
583
584 out:
585 mutex_unlock(&qp->mutex);
586
587 return ret;
588 }
589
590 static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n)
591 {
592 return pvrdma_page_dir_get_ptr(&qp->pdir,
593 qp->sq.offset + n * qp->sq.wqe_size);
594 }
595
596 static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n)
597 {
598 return pvrdma_page_dir_get_ptr(&qp->pdir,
599 qp->rq.offset + n * qp->rq.wqe_size);
600 }
601
602 static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr,
603 const struct ib_reg_wr *wr)
604 {
605 struct pvrdma_user_mr *mr = to_vmr(wr->mr);
606
607 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova;
608 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma;
609 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift;
610 wqe_hdr->wr.fast_reg.page_list_len = mr->npages;
611 wqe_hdr->wr.fast_reg.length = mr->ibmr.length;
612 wqe_hdr->wr.fast_reg.access_flags = wr->access;
613 wqe_hdr->wr.fast_reg.rkey = wr->key;
614
615 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages,
616 mr->npages);
617 }
618
619 /**
620 * pvrdma_post_send - post send work request entries on a QP
621 * @ibqp: the QP
622 * @wr: work request list to post
623 * @bad_wr: the first bad WR returned
624 *
625 * @return: 0 on success, otherwise errno returned.
626 */
627 int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
628 const struct ib_send_wr **bad_wr)
629 {
630 struct pvrdma_qp *qp = to_vqp(ibqp);
631 struct pvrdma_dev *dev = to_vdev(ibqp->device);
632 unsigned long flags;
633 struct pvrdma_sq_wqe_hdr *wqe_hdr;
634 struct pvrdma_sge *sge;
635 int i, ret;
636
637 /*
638 * In states lower than RTS, we can fail immediately. In other states,
639 * just post and let the device figure it out.
640 */
641 if (qp->state < IB_QPS_RTS) {
642 *bad_wr = wr;
643 return -EINVAL;
644 }
645
646 spin_lock_irqsave(&qp->sq.lock, flags);
647
648 while (wr) {
649 unsigned int tail = 0;
650
651 if (unlikely(!pvrdma_idx_ring_has_space(
652 qp->sq.ring, qp->sq.wqe_cnt, &tail))) {
653 dev_warn_ratelimited(&dev->pdev->dev,
654 "send queue is full\n");
655 *bad_wr = wr;
656 ret = -ENOMEM;
657 goto out;
658 }
659
660 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) {
661 dev_warn_ratelimited(&dev->pdev->dev,
662 "send SGE overflow\n");
663 *bad_wr = wr;
664 ret = -EINVAL;
665 goto out;
666 }
667
668 if (unlikely(wr->opcode < 0)) {
669 dev_warn_ratelimited(&dev->pdev->dev,
670 "invalid send opcode\n");
671 *bad_wr = wr;
672 ret = -EINVAL;
673 goto out;
674 }
675
676 /*
677 * Only support UD, RC.
678 * Need to check opcode table for thorough checking.
679 * opcode _UD _UC _RC
680 * _SEND x x x
681 * _SEND_WITH_IMM x x x
682 * _RDMA_WRITE x x
683 * _RDMA_WRITE_WITH_IMM x x
684 * _LOCAL_INV x x
685 * _SEND_WITH_INV x x
686 * _RDMA_READ x
687 * _ATOMIC_CMP_AND_SWP x
688 * _ATOMIC_FETCH_AND_ADD x
689 * _MASK_ATOMIC_CMP_AND_SWP x
690 * _MASK_ATOMIC_FETCH_AND_ADD x
691 * _REG_MR x
692 *
693 */
694 if (qp->ibqp.qp_type != IB_QPT_UD &&
695 qp->ibqp.qp_type != IB_QPT_RC &&
696 wr->opcode != IB_WR_SEND) {
697 dev_warn_ratelimited(&dev->pdev->dev,
698 "unsupported queuepair type\n");
699 *bad_wr = wr;
700 ret = -EINVAL;
701 goto out;
702 } else if (qp->ibqp.qp_type == IB_QPT_UD ||
703 qp->ibqp.qp_type == IB_QPT_GSI) {
704 if (wr->opcode != IB_WR_SEND &&
705 wr->opcode != IB_WR_SEND_WITH_IMM) {
706 dev_warn_ratelimited(&dev->pdev->dev,
707 "invalid send opcode\n");
708 *bad_wr = wr;
709 ret = -EINVAL;
710 goto out;
711 }
712 }
713
714 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail);
715 memset(wqe_hdr, 0, sizeof(*wqe_hdr));
716 wqe_hdr->wr_id = wr->wr_id;
717 wqe_hdr->num_sge = wr->num_sge;
718 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode);
719 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags);
720 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
721 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
722 wqe_hdr->ex.imm_data = wr->ex.imm_data;
723
724 switch (qp->ibqp.qp_type) {
725 case IB_QPT_GSI:
726 case IB_QPT_UD:
727 if (unlikely(!ud_wr(wr)->ah)) {
728 dev_warn_ratelimited(&dev->pdev->dev,
729 "invalid address handle\n");
730 *bad_wr = wr;
731 ret = -EINVAL;
732 goto out;
733 }
734
735 /*
736 * Use qkey from qp context if high order bit set,
737 * otherwise from work request.
738 */
739 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn;
740 wqe_hdr->wr.ud.remote_qkey =
741 ud_wr(wr)->remote_qkey & 0x80000000 ?
742 qp->qkey : ud_wr(wr)->remote_qkey;
743 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av;
744
745 break;
746 case IB_QPT_RC:
747 switch (wr->opcode) {
748 case IB_WR_RDMA_READ:
749 case IB_WR_RDMA_WRITE:
750 case IB_WR_RDMA_WRITE_WITH_IMM:
751 wqe_hdr->wr.rdma.remote_addr =
752 rdma_wr(wr)->remote_addr;
753 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey;
754 break;
755 case IB_WR_LOCAL_INV:
756 case IB_WR_SEND_WITH_INV:
757 wqe_hdr->ex.invalidate_rkey =
758 wr->ex.invalidate_rkey;
759 break;
760 case IB_WR_ATOMIC_CMP_AND_SWP:
761 case IB_WR_ATOMIC_FETCH_AND_ADD:
762 wqe_hdr->wr.atomic.remote_addr =
763 atomic_wr(wr)->remote_addr;
764 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey;
765 wqe_hdr->wr.atomic.compare_add =
766 atomic_wr(wr)->compare_add;
767 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP)
768 wqe_hdr->wr.atomic.swap =
769 atomic_wr(wr)->swap;
770 break;
771 case IB_WR_REG_MR:
772 ret = set_reg_seg(wqe_hdr, reg_wr(wr));
773 if (ret < 0) {
774 dev_warn_ratelimited(&dev->pdev->dev,
775 "Failed to set fast register work request\n");
776 *bad_wr = wr;
777 goto out;
778 }
779 break;
780 default:
781 break;
782 }
783
784 break;
785 default:
786 dev_warn_ratelimited(&dev->pdev->dev,
787 "invalid queuepair type\n");
788 ret = -EINVAL;
789 *bad_wr = wr;
790 goto out;
791 }
792
793 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
794 for (i = 0; i < wr->num_sge; i++) {
795 /* Need to check wqe_size 0 or max size */
796 sge->addr = wr->sg_list[i].addr;
797 sge->length = wr->sg_list[i].length;
798 sge->lkey = wr->sg_list[i].lkey;
799 sge++;
800 }
801
802 /* Make sure wqe is written before index update */
803 smp_wmb();
804
805 /* Update shared sq ring */
806 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail,
807 qp->sq.wqe_cnt);
808
809 wr = wr->next;
810 }
811
812 ret = 0;
813
814 out:
815 spin_unlock_irqrestore(&qp->sq.lock, flags);
816
817 if (!ret)
818 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle);
819
820 return ret;
821 }
822
823 /**
824 * pvrdma_post_receive - post receive work request entries on a QP
825 * @ibqp: the QP
826 * @wr: the work request list to post
827 * @bad_wr: the first bad WR returned
828 *
829 * @return: 0 on success, otherwise errno returned.
830 */
831 int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
832 const struct ib_recv_wr **bad_wr)
833 {
834 struct pvrdma_dev *dev = to_vdev(ibqp->device);
835 unsigned long flags;
836 struct pvrdma_qp *qp = to_vqp(ibqp);
837 struct pvrdma_rq_wqe_hdr *wqe_hdr;
838 struct pvrdma_sge *sge;
839 int ret = 0;
840 int i;
841
842 /*
843 * In the RESET state, we can fail immediately. For other states,
844 * just post and let the device figure it out.
845 */
846 if (qp->state == IB_QPS_RESET) {
847 *bad_wr = wr;
848 return -EINVAL;
849 }
850
851 if (qp->srq) {
852 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n");
853 *bad_wr = wr;
854 return -EINVAL;
855 }
856
857 spin_lock_irqsave(&qp->rq.lock, flags);
858
859 while (wr) {
860 unsigned int tail = 0;
861
862 if (unlikely(wr->num_sge > qp->rq.max_sg ||
863 wr->num_sge < 0)) {
864 ret = -EINVAL;
865 *bad_wr = wr;
866 dev_warn_ratelimited(&dev->pdev->dev,
867 "recv SGE overflow\n");
868 goto out;
869 }
870
871 if (unlikely(!pvrdma_idx_ring_has_space(
872 qp->rq.ring, qp->rq.wqe_cnt, &tail))) {
873 ret = -ENOMEM;
874 *bad_wr = wr;
875 dev_warn_ratelimited(&dev->pdev->dev,
876 "recv queue full\n");
877 goto out;
878 }
879
880 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail);
881 wqe_hdr->wr_id = wr->wr_id;
882 wqe_hdr->num_sge = wr->num_sge;
883 wqe_hdr->total_len = 0;
884
885 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
886 for (i = 0; i < wr->num_sge; i++) {
887 sge->addr = wr->sg_list[i].addr;
888 sge->length = wr->sg_list[i].length;
889 sge->lkey = wr->sg_list[i].lkey;
890 sge++;
891 }
892
893 /* Make sure wqe is written before index update */
894 smp_wmb();
895
896 /* Update shared rq ring */
897 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail,
898 qp->rq.wqe_cnt);
899
900 wr = wr->next;
901 }
902
903 spin_unlock_irqrestore(&qp->rq.lock, flags);
904
905 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle);
906
907 return ret;
908
909 out:
910 spin_unlock_irqrestore(&qp->rq.lock, flags);
911
912 return ret;
913 }
914
915 /**
916 * pvrdma_query_qp - query a queue pair's attributes
917 * @ibqp: the queue pair to query
918 * @attr: the queue pair's attributes
919 * @attr_mask: attributes mask
920 * @init_attr: initial queue pair attributes
921 *
922 * @returns 0 on success, otherwise returns an errno.
923 */
924 int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
925 int attr_mask, struct ib_qp_init_attr *init_attr)
926 {
927 struct pvrdma_dev *dev = to_vdev(ibqp->device);
928 struct pvrdma_qp *qp = to_vqp(ibqp);
929 union pvrdma_cmd_req req;
930 union pvrdma_cmd_resp rsp;
931 struct pvrdma_cmd_query_qp *cmd = &req.query_qp;
932 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp;
933 int ret = 0;
934
935 mutex_lock(&qp->mutex);
936
937 if (qp->state == IB_QPS_RESET) {
938 attr->qp_state = IB_QPS_RESET;
939 goto out;
940 }
941
942 memset(cmd, 0, sizeof(*cmd));
943 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP;
944 cmd->qp_handle = qp->qp_handle;
945 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
946
947 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP);
948 if (ret < 0) {
949 dev_warn(&dev->pdev->dev,
950 "could not query queuepair, error: %d\n", ret);
951 goto out;
952 }
953
954 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state);
955 attr->cur_qp_state =
956 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state);
957 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu);
958 attr->path_mig_state =
959 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state);
960 attr->qkey = resp->attrs.qkey;
961 attr->rq_psn = resp->attrs.rq_psn;
962 attr->sq_psn = resp->attrs.sq_psn;
963 attr->dest_qp_num = resp->attrs.dest_qp_num;
964 attr->qp_access_flags =
965 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags);
966 attr->pkey_index = resp->attrs.pkey_index;
967 attr->alt_pkey_index = resp->attrs.alt_pkey_index;
968 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify;
969 attr->sq_draining = resp->attrs.sq_draining;
970 attr->max_rd_atomic = resp->attrs.max_rd_atomic;
971 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic;
972 attr->min_rnr_timer = resp->attrs.min_rnr_timer;
973 attr->port_num = resp->attrs.port_num;
974 attr->timeout = resp->attrs.timeout;
975 attr->retry_cnt = resp->attrs.retry_cnt;
976 attr->rnr_retry = resp->attrs.rnr_retry;
977 attr->alt_port_num = resp->attrs.alt_port_num;
978 attr->alt_timeout = resp->attrs.alt_timeout;
979 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap);
980 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr);
981 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr);
982
983 qp->state = attr->qp_state;
984
985 ret = 0;
986
987 out:
988 attr->cur_qp_state = attr->qp_state;
989
990 init_attr->event_handler = qp->ibqp.event_handler;
991 init_attr->qp_context = qp->ibqp.qp_context;
992 init_attr->send_cq = qp->ibqp.send_cq;
993 init_attr->recv_cq = qp->ibqp.recv_cq;
994 init_attr->srq = qp->ibqp.srq;
995 init_attr->xrcd = NULL;
996 init_attr->cap = attr->cap;
997 init_attr->sq_sig_type = 0;
998 init_attr->qp_type = qp->ibqp.qp_type;
999 init_attr->create_flags = 0;
1000 init_attr->port_num = qp->port;
1001
1002 mutex_unlock(&qp->mutex);
1003 return ret;
1004 }
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