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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / infiniband / hw / vmw_pvrdma / pvrdma_qp.c
blob9de1281f9a3babadfd80ffb2a93853d172931e9f
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 void __pvrdma_destroy_qp(struct pvrdma_dev *dev,
56 struct pvrdma_qp *qp);
57
58 static inline void get_cqs(struct pvrdma_qp *qp, struct pvrdma_cq **send_cq,
59 struct pvrdma_cq **recv_cq)
60 {
61 *send_cq = to_vcq(qp->ibqp.send_cq);
62 *recv_cq = to_vcq(qp->ibqp.recv_cq);
63 }
64
65 static void pvrdma_lock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq,
66 unsigned long *scq_flags,
67 unsigned long *rcq_flags)
68 __acquires(scq->cq_lock) __acquires(rcq->cq_lock)
69 {
70 if (scq == rcq) {
71 spin_lock_irqsave(&scq->cq_lock, *scq_flags);
72 __acquire(rcq->cq_lock);
73 } else if (scq->cq_handle < rcq->cq_handle) {
74 spin_lock_irqsave(&scq->cq_lock, *scq_flags);
75 spin_lock_irqsave_nested(&rcq->cq_lock, *rcq_flags,
76 SINGLE_DEPTH_NESTING);
77 } else {
78 spin_lock_irqsave(&rcq->cq_lock, *rcq_flags);
79 spin_lock_irqsave_nested(&scq->cq_lock, *scq_flags,
80 SINGLE_DEPTH_NESTING);
81 }
82 }
83
84 static void pvrdma_unlock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq,
85 unsigned long *scq_flags,
86 unsigned long *rcq_flags)
87 __releases(scq->cq_lock) __releases(rcq->cq_lock)
88 {
89 if (scq == rcq) {
90 __release(rcq->cq_lock);
91 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
92 } else if (scq->cq_handle < rcq->cq_handle) {
93 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
94 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
95 } else {
96 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
97 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
98 }
99 }
100
101 static void pvrdma_reset_qp(struct pvrdma_qp *qp)
102 {
103 struct pvrdma_cq *scq, *rcq;
104 unsigned long scq_flags, rcq_flags;
105
106 /* Clean up cqes */
107 get_cqs(qp, &scq, &rcq);
108 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
109
110 _pvrdma_flush_cqe(qp, scq);
111 if (scq != rcq)
112 _pvrdma_flush_cqe(qp, rcq);
113
114 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
115
116 /*
117 * Reset queuepair. The checks are because usermode queuepairs won't
118 * have kernel ringstates.
119 */
120 if (qp->rq.ring) {
121 atomic_set(&qp->rq.ring->cons_head, 0);
122 atomic_set(&qp->rq.ring->prod_tail, 0);
123 }
124 if (qp->sq.ring) {
125 atomic_set(&qp->sq.ring->cons_head, 0);
126 atomic_set(&qp->sq.ring->prod_tail, 0);
127 }
128 }
129
130 static int pvrdma_set_rq_size(struct pvrdma_dev *dev,
131 struct ib_qp_cap *req_cap,
132 struct pvrdma_qp *qp)
133 {
134 if (req_cap->max_recv_wr > dev->dsr->caps.max_qp_wr ||
135 req_cap->max_recv_sge > dev->dsr->caps.max_sge) {
136 dev_warn(&dev->pdev->dev, "recv queue size invalid\n");
137 return -EINVAL;
138 }
139
140 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_recv_wr));
141 qp->rq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_recv_sge));
142
143 /* Write back */
144 req_cap->max_recv_wr = qp->rq.wqe_cnt;
145 req_cap->max_recv_sge = qp->rq.max_sg;
146
147 qp->rq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_rq_wqe_hdr) +
148 sizeof(struct pvrdma_sge) *
149 qp->rq.max_sg);
150 qp->npages_recv = (qp->rq.wqe_cnt * qp->rq.wqe_size + PAGE_SIZE - 1) /
151 PAGE_SIZE;
152
153 return 0;
154 }
155
156 static int pvrdma_set_sq_size(struct pvrdma_dev *dev, struct ib_qp_cap *req_cap,
157 struct pvrdma_qp *qp)
158 {
159 if (req_cap->max_send_wr > dev->dsr->caps.max_qp_wr ||
160 req_cap->max_send_sge > dev->dsr->caps.max_sge) {
161 dev_warn(&dev->pdev->dev, "send queue size invalid\n");
162 return -EINVAL;
163 }
164
165 qp->sq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_send_wr));
166 qp->sq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_send_sge));
167
168 /* Write back */
169 req_cap->max_send_wr = qp->sq.wqe_cnt;
170 req_cap->max_send_sge = qp->sq.max_sg;
171
172 qp->sq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_sq_wqe_hdr) +
173 sizeof(struct pvrdma_sge) *
174 qp->sq.max_sg);
175 /* Note: one extra page for the header. */
176 qp->npages_send = PVRDMA_QP_NUM_HEADER_PAGES +
177 (qp->sq.wqe_cnt * qp->sq.wqe_size + PAGE_SIZE - 1) /
178 PAGE_SIZE;
179
180 return 0;
181 }
182
183 /**
184 * pvrdma_create_qp - create queue pair
185 * @pd: protection domain
186 * @init_attr: queue pair attributes
187 * @udata: user data
188 *
189 * @return: the ib_qp pointer on success, otherwise returns an errno.
190 */
191 struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
192 struct ib_qp_init_attr *init_attr,
193 struct ib_udata *udata)
194 {
195 struct pvrdma_qp *qp = NULL;
196 struct pvrdma_dev *dev = to_vdev(pd->device);
197 union pvrdma_cmd_req req;
198 union pvrdma_cmd_resp rsp;
199 struct pvrdma_cmd_create_qp *cmd = &req.create_qp;
200 struct pvrdma_cmd_create_qp_resp *resp = &rsp.create_qp_resp;
201 struct pvrdma_cmd_create_qp_resp_v2 *resp_v2 = &rsp.create_qp_resp_v2;
202 struct pvrdma_create_qp ucmd;
203 struct pvrdma_create_qp_resp qp_resp = {};
204 unsigned long flags;
205 int ret;
206 bool is_srq = !!init_attr->srq;
207
208 if (init_attr->create_flags) {
209 dev_warn(&dev->pdev->dev,
210 "invalid create queuepair flags %#x\n",
211 init_attr->create_flags);
212 return ERR_PTR(-EINVAL);
213 }
214
215 if (init_attr->qp_type != IB_QPT_RC &&
216 init_attr->qp_type != IB_QPT_UD &&
217 init_attr->qp_type != IB_QPT_GSI) {
218 dev_warn(&dev->pdev->dev, "queuepair type %d not supported\n",
219 init_attr->qp_type);
220 return ERR_PTR(-EINVAL);
221 }
222
223 if (is_srq && !dev->dsr->caps.max_srq) {
224 dev_warn(&dev->pdev->dev,
225 "SRQs not supported by device\n");
226 return ERR_PTR(-EINVAL);
227 }
228
229 if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp))
230 return ERR_PTR(-ENOMEM);
231
232 switch (init_attr->qp_type) {
233 case IB_QPT_GSI:
234 if (init_attr->port_num == 0 ||
235 init_attr->port_num > pd->device->phys_port_cnt ||
236 udata) {
237 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n");
238 ret = -EINVAL;
239 goto err_qp;
240 }
241 /* fall through */
242 case IB_QPT_RC:
243 case IB_QPT_UD:
244 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
245 if (!qp) {
246 ret = -ENOMEM;
247 goto err_qp;
248 }
249
250 spin_lock_init(&qp->sq.lock);
251 spin_lock_init(&qp->rq.lock);
252 mutex_init(&qp->mutex);
253 refcount_set(&qp->refcnt, 1);
254 init_completion(&qp->free);
255
256 qp->state = IB_QPS_RESET;
257 qp->is_kernel = !udata;
258
259 if (!qp->is_kernel) {
260 dev_dbg(&dev->pdev->dev,
261 "create queuepair from user space\n");
262
263 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
264 ret = -EFAULT;
265 goto err_qp;
266 }
267
268 /* Userspace supports qpn and qp handles? */
269 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION &&
270 udata->outlen < sizeof(qp_resp)) {
271 dev_warn(&dev->pdev->dev,
272 "create queuepair not supported\n");
273 ret = -EOPNOTSUPP;
274 goto err_qp;
275 }
276
277 if (!is_srq) {
278 /* set qp->sq.wqe_cnt, shift, buf_size.. */
279 qp->rumem =
280 ib_umem_get(pd->device, ucmd.rbuf_addr,
281 ucmd.rbuf_size, 0);
282 if (IS_ERR(qp->rumem)) {
283 ret = PTR_ERR(qp->rumem);
284 goto err_qp;
285 }
286 qp->srq = NULL;
287 } else {
288 qp->rumem = NULL;
289 qp->srq = to_vsrq(init_attr->srq);
290 }
291
292 qp->sumem = ib_umem_get(pd->device, ucmd.sbuf_addr,
293 ucmd.sbuf_size, 0);
294 if (IS_ERR(qp->sumem)) {
295 if (!is_srq)
296 ib_umem_release(qp->rumem);
297 ret = PTR_ERR(qp->sumem);
298 goto err_qp;
299 }
300
301 qp->npages_send = ib_umem_page_count(qp->sumem);
302 if (!is_srq)
303 qp->npages_recv = ib_umem_page_count(qp->rumem);
304 else
305 qp->npages_recv = 0;
306 qp->npages = qp->npages_send + qp->npages_recv;
307 } else {
308 ret = pvrdma_set_sq_size(to_vdev(pd->device),
309 &init_attr->cap, qp);
310 if (ret)
311 goto err_qp;
312
313 ret = pvrdma_set_rq_size(to_vdev(pd->device),
314 &init_attr->cap, qp);
315 if (ret)
316 goto err_qp;
317
318 qp->npages = qp->npages_send + qp->npages_recv;
319
320 /* Skip header page. */
321 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE;
322
323 /* Recv queue pages are after send pages. */
324 qp->rq.offset = qp->npages_send * PAGE_SIZE;
325 }
326
327 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
328 dev_warn(&dev->pdev->dev,
329 "overflow pages in queuepair\n");
330 ret = -EINVAL;
331 goto err_umem;
332 }
333
334 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages,
335 qp->is_kernel);
336 if (ret) {
337 dev_warn(&dev->pdev->dev,
338 "could not allocate page directory\n");
339 goto err_umem;
340 }
341
342 if (!qp->is_kernel) {
343 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0);
344 if (!is_srq)
345 pvrdma_page_dir_insert_umem(&qp->pdir,
346 qp->rumem,
347 qp->npages_send);
348 } else {
349 /* Ring state is always the first page. */
350 qp->sq.ring = qp->pdir.pages[0];
351 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1];
352 }
353 break;
354 default:
355 ret = -EINVAL;
356 goto err_qp;
357 }
358
359 /* Not supported */
360 init_attr->cap.max_inline_data = 0;
361
362 memset(cmd, 0, sizeof(*cmd));
363 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP;
364 cmd->pd_handle = to_vpd(pd)->pd_handle;
365 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle;
366 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle;
367 if (is_srq)
368 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle;
369 else
370 cmd->srq_handle = 0;
371 cmd->max_send_wr = init_attr->cap.max_send_wr;
372 cmd->max_recv_wr = init_attr->cap.max_recv_wr;
373 cmd->max_send_sge = init_attr->cap.max_send_sge;
374 cmd->max_recv_sge = init_attr->cap.max_recv_sge;
375 cmd->max_inline_data = init_attr->cap.max_inline_data;
376 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
377 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type);
378 cmd->is_srq = is_srq;
379 cmd->lkey = 0;
380 cmd->access_flags = IB_ACCESS_LOCAL_WRITE;
381 cmd->total_chunks = qp->npages;
382 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES;
383 cmd->pdir_dma = qp->pdir.dir_dma;
384
385 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n",
386 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge,
387 cmd->max_recv_sge);
388
389 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP);
390 if (ret < 0) {
391 dev_warn(&dev->pdev->dev,
392 "could not create queuepair, error: %d\n", ret);
393 goto err_pdir;
394 }
395
396 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */
397 qp->port = init_attr->port_num;
398
399 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION) {
400 qp->ibqp.qp_num = resp_v2->qpn;
401 qp->qp_handle = resp_v2->qp_handle;
402 } else {
403 qp->ibqp.qp_num = resp->qpn;
404 qp->qp_handle = resp->qpn;
405 }
406
407 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
408 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp;
409 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
410
411 if (udata) {
412 qp_resp.qpn = qp->ibqp.qp_num;
413 qp_resp.qp_handle = qp->qp_handle;
414
415 if (ib_copy_to_udata(udata, &qp_resp,
416 min(udata->outlen, sizeof(qp_resp)))) {
417 dev_warn(&dev->pdev->dev,
418 "failed to copy back udata\n");
419 __pvrdma_destroy_qp(dev, qp);
420 return ERR_PTR(-EINVAL);
421 }
422 }
423
424 return &qp->ibqp;
425
426 err_pdir:
427 pvrdma_page_dir_cleanup(dev, &qp->pdir);
428 err_umem:
429 ib_umem_release(qp->rumem);
430 ib_umem_release(qp->sumem);
431 err_qp:
432 kfree(qp);
433 atomic_dec(&dev->num_qps);
434
435 return ERR_PTR(ret);
436 }
437
438 static void _pvrdma_free_qp(struct pvrdma_qp *qp)
439 {
440 unsigned long flags;
441 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device);
442
443 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
444 dev->qp_tbl[qp->qp_handle] = NULL;
445 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
446
447 if (refcount_dec_and_test(&qp->refcnt))
448 complete(&qp->free);
449 wait_for_completion(&qp->free);
450
451 ib_umem_release(qp->rumem);
452 ib_umem_release(qp->sumem);
453
454 pvrdma_page_dir_cleanup(dev, &qp->pdir);
455
456 kfree(qp);
457
458 atomic_dec(&dev->num_qps);
459 }
460
461 static void pvrdma_free_qp(struct pvrdma_qp *qp)
462 {
463 struct pvrdma_cq *scq;
464 struct pvrdma_cq *rcq;
465 unsigned long scq_flags, rcq_flags;
466
467 /* In case cq is polling */
468 get_cqs(qp, &scq, &rcq);
469 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
470
471 _pvrdma_flush_cqe(qp, scq);
472 if (scq != rcq)
473 _pvrdma_flush_cqe(qp, rcq);
474
475 /*
476 * We're now unlocking the CQs before clearing out the qp handle this
477 * should still be safe. We have destroyed the backend QP and flushed
478 * the CQEs so there should be no other completions for this QP.
479 */
480 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
481
482 _pvrdma_free_qp(qp);
483 }
484
485 static inline void _pvrdma_destroy_qp_work(struct pvrdma_dev *dev,
486 u32 qp_handle)
487 {
488 union pvrdma_cmd_req req;
489 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp;
490 int ret;
491
492 memset(cmd, 0, sizeof(*cmd));
493 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP;
494 cmd->qp_handle = qp_handle;
495
496 ret = pvrdma_cmd_post(dev, &req, NULL, 0);
497 if (ret < 0)
498 dev_warn(&dev->pdev->dev,
499 "destroy queuepair failed, error: %d\n", ret);
500 }
501
502 /**
503 * pvrdma_destroy_qp - destroy a queue pair
504 * @qp: the queue pair to destroy
505 * @udata: user data or null for kernel object
506 *
507 * @return: always 0.
508 */
509 int pvrdma_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
510 {
511 struct pvrdma_qp *vqp = to_vqp(qp);
512
513 _pvrdma_destroy_qp_work(to_vdev(qp->device), vqp->qp_handle);
514 pvrdma_free_qp(vqp);
515
516 return 0;
517 }
518
519 static void __pvrdma_destroy_qp(struct pvrdma_dev *dev,
520 struct pvrdma_qp *qp)
521 {
522 _pvrdma_destroy_qp_work(dev, qp->qp_handle);
523 _pvrdma_free_qp(qp);
524 }
525
526 /**
527 * pvrdma_modify_qp - modify queue pair attributes
528 * @ibqp: the queue pair
529 * @attr: the new queue pair's attributes
530 * @attr_mask: attributes mask
531 * @udata: user data
532 *
533 * @returns 0 on success, otherwise returns an errno.
534 */
535 int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
536 int attr_mask, struct ib_udata *udata)
537 {
538 struct pvrdma_dev *dev = to_vdev(ibqp->device);
539 struct pvrdma_qp *qp = to_vqp(ibqp);
540 union pvrdma_cmd_req req;
541 union pvrdma_cmd_resp rsp;
542 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp;
543 enum ib_qp_state cur_state, next_state;
544 int ret;
545
546 /* Sanity checking. Should need lock here */
547 mutex_lock(&qp->mutex);
548 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state :
549 qp->state;
550 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state;
551
552 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type,
553 attr_mask)) {
554 ret = -EINVAL;
555 goto out;
556 }
557
558 if (attr_mask & IB_QP_PORT) {
559 if (attr->port_num == 0 ||
560 attr->port_num > ibqp->device->phys_port_cnt) {
561 ret = -EINVAL;
562 goto out;
563 }
564 }
565
566 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
567 if (attr->min_rnr_timer > 31) {
568 ret = -EINVAL;
569 goto out;
570 }
571 }
572
573 if (attr_mask & IB_QP_PKEY_INDEX) {
574 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) {
575 ret = -EINVAL;
576 goto out;
577 }
578 }
579
580 if (attr_mask & IB_QP_QKEY)
581 qp->qkey = attr->qkey;
582
583 if (cur_state == next_state && cur_state == IB_QPS_RESET) {
584 ret = 0;
585 goto out;
586 }
587
588 qp->state = next_state;
589 memset(cmd, 0, sizeof(*cmd));
590 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP;
591 cmd->qp_handle = qp->qp_handle;
592 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
593 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state);
594 cmd->attrs.cur_qp_state =
595 ib_qp_state_to_pvrdma(attr->cur_qp_state);
596 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu);
597 cmd->attrs.path_mig_state =
598 ib_mig_state_to_pvrdma(attr->path_mig_state);
599 cmd->attrs.qkey = attr->qkey;
600 cmd->attrs.rq_psn = attr->rq_psn;
601 cmd->attrs.sq_psn = attr->sq_psn;
602 cmd->attrs.dest_qp_num = attr->dest_qp_num;
603 cmd->attrs.qp_access_flags =
604 ib_access_flags_to_pvrdma(attr->qp_access_flags);
605 cmd->attrs.pkey_index = attr->pkey_index;
606 cmd->attrs.alt_pkey_index = attr->alt_pkey_index;
607 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify;
608 cmd->attrs.sq_draining = attr->sq_draining;
609 cmd->attrs.max_rd_atomic = attr->max_rd_atomic;
610 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic;
611 cmd->attrs.min_rnr_timer = attr->min_rnr_timer;
612 cmd->attrs.port_num = attr->port_num;
613 cmd->attrs.timeout = attr->timeout;
614 cmd->attrs.retry_cnt = attr->retry_cnt;
615 cmd->attrs.rnr_retry = attr->rnr_retry;
616 cmd->attrs.alt_port_num = attr->alt_port_num;
617 cmd->attrs.alt_timeout = attr->alt_timeout;
618 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap);
619 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr);
620 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr);
621
622 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP);
623 if (ret < 0) {
624 dev_warn(&dev->pdev->dev,
625 "could not modify queuepair, error: %d\n", ret);
626 } else if (rsp.hdr.err > 0) {
627 dev_warn(&dev->pdev->dev,
628 "cannot modify queuepair, error: %d\n", rsp.hdr.err);
629 ret = -EINVAL;
630 }
631
632 if (ret == 0 && next_state == IB_QPS_RESET)
633 pvrdma_reset_qp(qp);
634
635 out:
636 mutex_unlock(&qp->mutex);
637
638 return ret;
639 }
640
641 static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n)
642 {
643 return pvrdma_page_dir_get_ptr(&qp->pdir,
644 qp->sq.offset + n * qp->sq.wqe_size);
645 }
646
647 static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n)
648 {
649 return pvrdma_page_dir_get_ptr(&qp->pdir,
650 qp->rq.offset + n * qp->rq.wqe_size);
651 }
652
653 static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr,
654 const struct ib_reg_wr *wr)
655 {
656 struct pvrdma_user_mr *mr = to_vmr(wr->mr);
657
658 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova;
659 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma;
660 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift;
661 wqe_hdr->wr.fast_reg.page_list_len = mr->npages;
662 wqe_hdr->wr.fast_reg.length = mr->ibmr.length;
663 wqe_hdr->wr.fast_reg.access_flags = wr->access;
664 wqe_hdr->wr.fast_reg.rkey = wr->key;
665
666 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages,
667 mr->npages);
668 }
669
670 /**
671 * pvrdma_post_send - post send work request entries on a QP
672 * @ibqp: the QP
673 * @wr: work request list to post
674 * @bad_wr: the first bad WR returned
675 *
676 * @return: 0 on success, otherwise errno returned.
677 */
678 int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
679 const struct ib_send_wr **bad_wr)
680 {
681 struct pvrdma_qp *qp = to_vqp(ibqp);
682 struct pvrdma_dev *dev = to_vdev(ibqp->device);
683 unsigned long flags;
684 struct pvrdma_sq_wqe_hdr *wqe_hdr;
685 struct pvrdma_sge *sge;
686 int i, ret;
687
688 /*
689 * In states lower than RTS, we can fail immediately. In other states,
690 * just post and let the device figure it out.
691 */
692 if (qp->state < IB_QPS_RTS) {
693 *bad_wr = wr;
694 return -EINVAL;
695 }
696
697 spin_lock_irqsave(&qp->sq.lock, flags);
698
699 while (wr) {
700 unsigned int tail = 0;
701
702 if (unlikely(!pvrdma_idx_ring_has_space(
703 qp->sq.ring, qp->sq.wqe_cnt, &tail))) {
704 dev_warn_ratelimited(&dev->pdev->dev,
705 "send queue is full\n");
706 *bad_wr = wr;
707 ret = -ENOMEM;
708 goto out;
709 }
710
711 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) {
712 dev_warn_ratelimited(&dev->pdev->dev,
713 "send SGE overflow\n");
714 *bad_wr = wr;
715 ret = -EINVAL;
716 goto out;
717 }
718
719 if (unlikely(wr->opcode < 0)) {
720 dev_warn_ratelimited(&dev->pdev->dev,
721 "invalid send opcode\n");
722 *bad_wr = wr;
723 ret = -EINVAL;
724 goto out;
725 }
726
727 /*
728 * Only support UD, RC.
729 * Need to check opcode table for thorough checking.
730 * opcode _UD _UC _RC
731 * _SEND x x x
732 * _SEND_WITH_IMM x x x
733 * _RDMA_WRITE x x
734 * _RDMA_WRITE_WITH_IMM x x
735 * _LOCAL_INV x x
736 * _SEND_WITH_INV x x
737 * _RDMA_READ x
738 * _ATOMIC_CMP_AND_SWP x
739 * _ATOMIC_FETCH_AND_ADD x
740 * _MASK_ATOMIC_CMP_AND_SWP x
741 * _MASK_ATOMIC_FETCH_AND_ADD x
742 * _REG_MR x
743 *
744 */
745 if (qp->ibqp.qp_type != IB_QPT_UD &&
746 qp->ibqp.qp_type != IB_QPT_RC &&
747 wr->opcode != IB_WR_SEND) {
748 dev_warn_ratelimited(&dev->pdev->dev,
749 "unsupported queuepair type\n");
750 *bad_wr = wr;
751 ret = -EINVAL;
752 goto out;
753 } else if (qp->ibqp.qp_type == IB_QPT_UD ||
754 qp->ibqp.qp_type == IB_QPT_GSI) {
755 if (wr->opcode != IB_WR_SEND &&
756 wr->opcode != IB_WR_SEND_WITH_IMM) {
757 dev_warn_ratelimited(&dev->pdev->dev,
758 "invalid send opcode\n");
759 *bad_wr = wr;
760 ret = -EINVAL;
761 goto out;
762 }
763 }
764
765 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail);
766 memset(wqe_hdr, 0, sizeof(*wqe_hdr));
767 wqe_hdr->wr_id = wr->wr_id;
768 wqe_hdr->num_sge = wr->num_sge;
769 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode);
770 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags);
771 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
772 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
773 wqe_hdr->ex.imm_data = wr->ex.imm_data;
774
775 if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) {
776 *bad_wr = wr;
777 ret = -EINVAL;
778 goto out;
779 }
780
781 switch (qp->ibqp.qp_type) {
782 case IB_QPT_GSI:
783 case IB_QPT_UD:
784 if (unlikely(!ud_wr(wr)->ah)) {
785 dev_warn_ratelimited(&dev->pdev->dev,
786 "invalid address handle\n");
787 *bad_wr = wr;
788 ret = -EINVAL;
789 goto out;
790 }
791
792 /*
793 * Use qkey from qp context if high order bit set,
794 * otherwise from work request.
795 */
796 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn;
797 wqe_hdr->wr.ud.remote_qkey =
798 ud_wr(wr)->remote_qkey & 0x80000000 ?
799 qp->qkey : ud_wr(wr)->remote_qkey;
800 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av;
801
802 break;
803 case IB_QPT_RC:
804 switch (wr->opcode) {
805 case IB_WR_RDMA_READ:
806 case IB_WR_RDMA_WRITE:
807 case IB_WR_RDMA_WRITE_WITH_IMM:
808 wqe_hdr->wr.rdma.remote_addr =
809 rdma_wr(wr)->remote_addr;
810 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey;
811 break;
812 case IB_WR_LOCAL_INV:
813 case IB_WR_SEND_WITH_INV:
814 wqe_hdr->ex.invalidate_rkey =
815 wr->ex.invalidate_rkey;
816 break;
817 case IB_WR_ATOMIC_CMP_AND_SWP:
818 case IB_WR_ATOMIC_FETCH_AND_ADD:
819 wqe_hdr->wr.atomic.remote_addr =
820 atomic_wr(wr)->remote_addr;
821 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey;
822 wqe_hdr->wr.atomic.compare_add =
823 atomic_wr(wr)->compare_add;
824 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP)
825 wqe_hdr->wr.atomic.swap =
826 atomic_wr(wr)->swap;
827 break;
828 case IB_WR_REG_MR:
829 ret = set_reg_seg(wqe_hdr, reg_wr(wr));
830 if (ret < 0) {
831 dev_warn_ratelimited(&dev->pdev->dev,
832 "Failed to set fast register work request\n");
833 *bad_wr = wr;
834 goto out;
835 }
836 break;
837 default:
838 break;
839 }
840
841 break;
842 default:
843 dev_warn_ratelimited(&dev->pdev->dev,
844 "invalid queuepair type\n");
845 ret = -EINVAL;
846 *bad_wr = wr;
847 goto out;
848 }
849
850 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
851 for (i = 0; i < wr->num_sge; i++) {
852 /* Need to check wqe_size 0 or max size */
853 sge->addr = wr->sg_list[i].addr;
854 sge->length = wr->sg_list[i].length;
855 sge->lkey = wr->sg_list[i].lkey;
856 sge++;
857 }
858
859 /* Make sure wqe is written before index update */
860 smp_wmb();
861
862 /* Update shared sq ring */
863 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail,
864 qp->sq.wqe_cnt);
865
866 wr = wr->next;
867 }
868
869 ret = 0;
870
871 out:
872 spin_unlock_irqrestore(&qp->sq.lock, flags);
873
874 if (!ret)
875 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle);
876
877 return ret;
878 }
879
880 /**
881 * pvrdma_post_receive - post receive work request entries on a QP
882 * @ibqp: the QP
883 * @wr: the work request list to post
884 * @bad_wr: the first bad WR returned
885 *
886 * @return: 0 on success, otherwise errno returned.
887 */
888 int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
889 const struct ib_recv_wr **bad_wr)
890 {
891 struct pvrdma_dev *dev = to_vdev(ibqp->device);
892 unsigned long flags;
893 struct pvrdma_qp *qp = to_vqp(ibqp);
894 struct pvrdma_rq_wqe_hdr *wqe_hdr;
895 struct pvrdma_sge *sge;
896 int ret = 0;
897 int i;
898
899 /*
900 * In the RESET state, we can fail immediately. For other states,
901 * just post and let the device figure it out.
902 */
903 if (qp->state == IB_QPS_RESET) {
904 *bad_wr = wr;
905 return -EINVAL;
906 }
907
908 if (qp->srq) {
909 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n");
910 *bad_wr = wr;
911 return -EINVAL;
912 }
913
914 spin_lock_irqsave(&qp->rq.lock, flags);
915
916 while (wr) {
917 unsigned int tail = 0;
918
919 if (unlikely(wr->num_sge > qp->rq.max_sg ||
920 wr->num_sge < 0)) {
921 ret = -EINVAL;
922 *bad_wr = wr;
923 dev_warn_ratelimited(&dev->pdev->dev,
924 "recv SGE overflow\n");
925 goto out;
926 }
927
928 if (unlikely(!pvrdma_idx_ring_has_space(
929 qp->rq.ring, qp->rq.wqe_cnt, &tail))) {
930 ret = -ENOMEM;
931 *bad_wr = wr;
932 dev_warn_ratelimited(&dev->pdev->dev,
933 "recv queue full\n");
934 goto out;
935 }
936
937 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail);
938 wqe_hdr->wr_id = wr->wr_id;
939 wqe_hdr->num_sge = wr->num_sge;
940 wqe_hdr->total_len = 0;
941
942 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
943 for (i = 0; i < wr->num_sge; i++) {
944 sge->addr = wr->sg_list[i].addr;
945 sge->length = wr->sg_list[i].length;
946 sge->lkey = wr->sg_list[i].lkey;
947 sge++;
948 }
949
950 /* Make sure wqe is written before index update */
951 smp_wmb();
952
953 /* Update shared rq ring */
954 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail,
955 qp->rq.wqe_cnt);
956
957 wr = wr->next;
958 }
959
960 spin_unlock_irqrestore(&qp->rq.lock, flags);
961
962 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle);
963
964 return ret;
965
966 out:
967 spin_unlock_irqrestore(&qp->rq.lock, flags);
968
969 return ret;
970 }
971
972 /**
973 * pvrdma_query_qp - query a queue pair's attributes
974 * @ibqp: the queue pair to query
975 * @attr: the queue pair's attributes
976 * @attr_mask: attributes mask
977 * @init_attr: initial queue pair attributes
978 *
979 * @returns 0 on success, otherwise returns an errno.
980 */
981 int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
982 int attr_mask, struct ib_qp_init_attr *init_attr)
983 {
984 struct pvrdma_dev *dev = to_vdev(ibqp->device);
985 struct pvrdma_qp *qp = to_vqp(ibqp);
986 union pvrdma_cmd_req req;
987 union pvrdma_cmd_resp rsp;
988 struct pvrdma_cmd_query_qp *cmd = &req.query_qp;
989 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp;
990 int ret = 0;
991
992 mutex_lock(&qp->mutex);
993
994 if (qp->state == IB_QPS_RESET) {
995 attr->qp_state = IB_QPS_RESET;
996 goto out;
997 }
998
999 memset(cmd, 0, sizeof(*cmd));
1000 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP;
1001 cmd->qp_handle = qp->qp_handle;
1002 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
1003
1004 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP);
1005 if (ret < 0) {
1006 dev_warn(&dev->pdev->dev,
1007 "could not query queuepair, error: %d\n", ret);
1008 goto out;
1009 }
1010
1011 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state);
1012 attr->cur_qp_state =
1013 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state);
1014 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu);
1015 attr->path_mig_state =
1016 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state);
1017 attr->qkey = resp->attrs.qkey;
1018 attr->rq_psn = resp->attrs.rq_psn;
1019 attr->sq_psn = resp->attrs.sq_psn;
1020 attr->dest_qp_num = resp->attrs.dest_qp_num;
1021 attr->qp_access_flags =
1022 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags);
1023 attr->pkey_index = resp->attrs.pkey_index;
1024 attr->alt_pkey_index = resp->attrs.alt_pkey_index;
1025 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify;
1026 attr->sq_draining = resp->attrs.sq_draining;
1027 attr->max_rd_atomic = resp->attrs.max_rd_atomic;
1028 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic;
1029 attr->min_rnr_timer = resp->attrs.min_rnr_timer;
1030 attr->port_num = resp->attrs.port_num;
1031 attr->timeout = resp->attrs.timeout;
1032 attr->retry_cnt = resp->attrs.retry_cnt;
1033 attr->rnr_retry = resp->attrs.rnr_retry;
1034 attr->alt_port_num = resp->attrs.alt_port_num;
1035 attr->alt_timeout = resp->attrs.alt_timeout;
1036 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap);
1037 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr);
1038 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr);
1039
1040 qp->state = attr->qp_state;
1041
1042 ret = 0;
1043
1044 out:
1045 attr->cur_qp_state = attr->qp_state;
1046
1047 init_attr->event_handler = qp->ibqp.event_handler;
1048 init_attr->qp_context = qp->ibqp.qp_context;
1049 init_attr->send_cq = qp->ibqp.send_cq;
1050 init_attr->recv_cq = qp->ibqp.recv_cq;
1051 init_attr->srq = qp->ibqp.srq;
1052 init_attr->xrcd = NULL;
1053 init_attr->cap = attr->cap;
1054 init_attr->sq_sig_type = 0;
1055 init_attr->qp_type = qp->ibqp.qp_type;
1056 init_attr->create_flags = 0;
1057 init_attr->port_num = qp->port;
1058
1059 mutex_unlock(&qp->mutex);
1060 return ret;
1061 }
Linux with added FPC-III support