?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / infiniband / hw / vmw_pvrdma / pvrdma_qp.c
blob98b2a0090bf2a13f54eecf7277fdbc26f506eac0
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 * @ibqp: queue pair
186 * @init_attr: queue pair attributes
187 * @udata: user data
188 *
189 * @return: the 0 on success, otherwise returns an errno.
190 */
191 int pvrdma_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
192 struct ib_udata *udata)
193 {
194 struct pvrdma_qp *qp = to_vqp(ibqp);
195 struct pvrdma_dev *dev = to_vdev(ibqp->device);
196 union pvrdma_cmd_req req;
197 union pvrdma_cmd_resp rsp;
198 struct pvrdma_cmd_create_qp *cmd = &req.create_qp;
199 struct pvrdma_cmd_create_qp_resp *resp = &rsp.create_qp_resp;
200 struct pvrdma_cmd_create_qp_resp_v2 *resp_v2 = &rsp.create_qp_resp_v2;
201 struct pvrdma_create_qp ucmd;
202 struct pvrdma_create_qp_resp qp_resp = {};
203 unsigned long flags;
204 int ret;
205 bool is_srq = !!init_attr->srq;
206
207 if (init_attr->create_flags) {
208 dev_warn(&dev->pdev->dev,
209 "invalid create queuepair flags %#x\n",
210 init_attr->create_flags);
211 return -EOPNOTSUPP;
212 }
213
214 if (init_attr->qp_type != IB_QPT_RC &&
215 init_attr->qp_type != IB_QPT_UD &&
216 init_attr->qp_type != IB_QPT_GSI) {
217 dev_warn(&dev->pdev->dev, "queuepair type %d not supported\n",
218 init_attr->qp_type);
219 return -EOPNOTSUPP;
220 }
221
222 if (is_srq && !dev->dsr->caps.max_srq) {
223 dev_warn(&dev->pdev->dev,
224 "SRQs not supported by device\n");
225 return -EINVAL;
226 }
227
228 if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp))
229 return -ENOMEM;
230
231 switch (init_attr->qp_type) {
232 case IB_QPT_GSI:
233 if (init_attr->port_num == 0 ||
234 init_attr->port_num > ibqp->device->phys_port_cnt) {
235 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n");
236 ret = -EINVAL;
237 goto err_qp;
238 }
239 fallthrough;
240 case IB_QPT_RC:
241 case IB_QPT_UD:
242 spin_lock_init(&qp->sq.lock);
243 spin_lock_init(&qp->rq.lock);
244 mutex_init(&qp->mutex);
245 refcount_set(&qp->refcnt, 1);
246 init_completion(&qp->free);
247
248 qp->state = IB_QPS_RESET;
249 qp->is_kernel = !udata;
250
251 if (!qp->is_kernel) {
252 dev_dbg(&dev->pdev->dev,
253 "create queuepair from user space\n");
254
255 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
256 ret = -EFAULT;
257 goto err_qp;
258 }
259
260 /* Userspace supports qpn and qp handles? */
261 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION &&
262 udata->outlen < sizeof(qp_resp)) {
263 dev_warn(&dev->pdev->dev,
264 "create queuepair not supported\n");
265 ret = -EOPNOTSUPP;
266 goto err_qp;
267 }
268
269 if (!is_srq) {
270 /* set qp->sq.wqe_cnt, shift, buf_size.. */
271 qp->rumem = ib_umem_get(ibqp->device,
272 ucmd.rbuf_addr,
273 ucmd.rbuf_size, 0);
274 if (IS_ERR(qp->rumem)) {
275 ret = PTR_ERR(qp->rumem);
276 goto err_qp;
277 }
278 qp->srq = NULL;
279 } else {
280 qp->rumem = NULL;
281 qp->srq = to_vsrq(init_attr->srq);
282 }
283
284 qp->sumem = ib_umem_get(ibqp->device, ucmd.sbuf_addr,
285 ucmd.sbuf_size, 0);
286 if (IS_ERR(qp->sumem)) {
287 if (!is_srq)
288 ib_umem_release(qp->rumem);
289 ret = PTR_ERR(qp->sumem);
290 goto err_qp;
291 }
292
293 qp->npages_send =
294 ib_umem_num_dma_blocks(qp->sumem, PAGE_SIZE);
295 if (!is_srq)
296 qp->npages_recv = ib_umem_num_dma_blocks(
297 qp->rumem, PAGE_SIZE);
298 else
299 qp->npages_recv = 0;
300 qp->npages = qp->npages_send + qp->npages_recv;
301 } else {
302 ret = pvrdma_set_sq_size(to_vdev(ibqp->device),
303 &init_attr->cap, qp);
304 if (ret)
305 goto err_qp;
306
307 ret = pvrdma_set_rq_size(to_vdev(ibqp->device),
308 &init_attr->cap, qp);
309 if (ret)
310 goto err_qp;
311
312 qp->npages = qp->npages_send + qp->npages_recv;
313
314 /* Skip header page. */
315 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE;
316
317 /* Recv queue pages are after send pages. */
318 qp->rq.offset = qp->npages_send * PAGE_SIZE;
319 }
320
321 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
322 dev_warn(&dev->pdev->dev,
323 "overflow pages in queuepair\n");
324 ret = -EINVAL;
325 goto err_umem;
326 }
327
328 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages,
329 qp->is_kernel);
330 if (ret) {
331 dev_warn(&dev->pdev->dev,
332 "could not allocate page directory\n");
333 goto err_umem;
334 }
335
336 if (!qp->is_kernel) {
337 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0);
338 if (!is_srq)
339 pvrdma_page_dir_insert_umem(&qp->pdir,
340 qp->rumem,
341 qp->npages_send);
342 } else {
343 /* Ring state is always the first page. */
344 qp->sq.ring = qp->pdir.pages[0];
345 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1];
346 }
347 break;
348 default:
349 ret = -EINVAL;
350 goto err_qp;
351 }
352
353 /* Not supported */
354 init_attr->cap.max_inline_data = 0;
355
356 memset(cmd, 0, sizeof(*cmd));
357 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP;
358 cmd->pd_handle = to_vpd(ibqp->pd)->pd_handle;
359 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle;
360 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle;
361 if (is_srq)
362 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle;
363 else
364 cmd->srq_handle = 0;
365 cmd->max_send_wr = init_attr->cap.max_send_wr;
366 cmd->max_recv_wr = init_attr->cap.max_recv_wr;
367 cmd->max_send_sge = init_attr->cap.max_send_sge;
368 cmd->max_recv_sge = init_attr->cap.max_recv_sge;
369 cmd->max_inline_data = init_attr->cap.max_inline_data;
370 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
371 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type);
372 cmd->is_srq = is_srq;
373 cmd->lkey = 0;
374 cmd->access_flags = IB_ACCESS_LOCAL_WRITE;
375 cmd->total_chunks = qp->npages;
376 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES;
377 cmd->pdir_dma = qp->pdir.dir_dma;
378
379 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n",
380 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge,
381 cmd->max_recv_sge);
382
383 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP);
384 if (ret < 0) {
385 dev_warn(&dev->pdev->dev,
386 "could not create queuepair, error: %d\n", ret);
387 goto err_pdir;
388 }
389
390 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */
391 qp->port = init_attr->port_num;
392
393 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION) {
394 qp->ibqp.qp_num = resp_v2->qpn;
395 qp->qp_handle = resp_v2->qp_handle;
396 } else {
397 qp->ibqp.qp_num = resp->qpn;
398 qp->qp_handle = resp->qpn;
399 }
400
401 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
402 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp;
403 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
404
405 if (udata) {
406 qp_resp.qpn = qp->ibqp.qp_num;
407 qp_resp.qp_handle = qp->qp_handle;
408
409 if (ib_copy_to_udata(udata, &qp_resp,
410 min(udata->outlen, sizeof(qp_resp)))) {
411 dev_warn(&dev->pdev->dev,
412 "failed to copy back udata\n");
413 __pvrdma_destroy_qp(dev, qp);
414 return -EINVAL;
415 }
416 }
417
418 return 0;
419
420 err_pdir:
421 pvrdma_page_dir_cleanup(dev, &qp->pdir);
422 err_umem:
423 ib_umem_release(qp->rumem);
424 ib_umem_release(qp->sumem);
425 err_qp:
426 atomic_dec(&dev->num_qps);
427 return ret;
428 }
429
430 static void _pvrdma_free_qp(struct pvrdma_qp *qp)
431 {
432 unsigned long flags;
433 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device);
434
435 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
436 dev->qp_tbl[qp->qp_handle] = NULL;
437 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
438
439 if (refcount_dec_and_test(&qp->refcnt))
440 complete(&qp->free);
441 wait_for_completion(&qp->free);
442
443 ib_umem_release(qp->rumem);
444 ib_umem_release(qp->sumem);
445
446 pvrdma_page_dir_cleanup(dev, &qp->pdir);
447
448 atomic_dec(&dev->num_qps);
449 }
450
451 static void pvrdma_free_qp(struct pvrdma_qp *qp)
452 {
453 struct pvrdma_cq *scq;
454 struct pvrdma_cq *rcq;
455 unsigned long scq_flags, rcq_flags;
456
457 /* In case cq is polling */
458 get_cqs(qp, &scq, &rcq);
459 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
460
461 _pvrdma_flush_cqe(qp, scq);
462 if (scq != rcq)
463 _pvrdma_flush_cqe(qp, rcq);
464
465 /*
466 * We're now unlocking the CQs before clearing out the qp handle this
467 * should still be safe. We have destroyed the backend QP and flushed
468 * the CQEs so there should be no other completions for this QP.
469 */
470 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
471
472 _pvrdma_free_qp(qp);
473 }
474
475 static inline void _pvrdma_destroy_qp_work(struct pvrdma_dev *dev,
476 u32 qp_handle)
477 {
478 union pvrdma_cmd_req req;
479 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp;
480 int ret;
481
482 memset(cmd, 0, sizeof(*cmd));
483 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP;
484 cmd->qp_handle = qp_handle;
485
486 ret = pvrdma_cmd_post(dev, &req, NULL, 0);
487 if (ret < 0)
488 dev_warn(&dev->pdev->dev,
489 "destroy queuepair failed, error: %d\n", ret);
490 }
491
492 /**
493 * pvrdma_destroy_qp - destroy a queue pair
494 * @qp: the queue pair to destroy
495 * @udata: user data or null for kernel object
496 *
497 * @return: always 0.
498 */
499 int pvrdma_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
500 {
501 struct pvrdma_qp *vqp = to_vqp(qp);
502
503 _pvrdma_destroy_qp_work(to_vdev(qp->device), vqp->qp_handle);
504 pvrdma_free_qp(vqp);
505
506 return 0;
507 }
508
509 static void __pvrdma_destroy_qp(struct pvrdma_dev *dev,
510 struct pvrdma_qp *qp)
511 {
512 _pvrdma_destroy_qp_work(dev, qp->qp_handle);
513 _pvrdma_free_qp(qp);
514 }
515
516 /**
517 * pvrdma_modify_qp - modify queue pair attributes
518 * @ibqp: the queue pair
519 * @attr: the new queue pair's attributes
520 * @attr_mask: attributes mask
521 * @udata: user data
522 *
523 * @returns 0 on success, otherwise returns an errno.
524 */
525 int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
526 int attr_mask, struct ib_udata *udata)
527 {
528 struct pvrdma_dev *dev = to_vdev(ibqp->device);
529 struct pvrdma_qp *qp = to_vqp(ibqp);
530 union pvrdma_cmd_req req;
531 union pvrdma_cmd_resp rsp;
532 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp;
533 enum ib_qp_state cur_state, next_state;
534 int ret;
535
536 if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
537 return -EOPNOTSUPP;
538
539 /* Sanity checking. Should need lock here */
540 mutex_lock(&qp->mutex);
541 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state :
542 qp->state;
543 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state;
544
545 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type,
546 attr_mask)) {
547 ret = -EINVAL;
548 goto out;
549 }
550
551 if (attr_mask & IB_QP_PORT) {
552 if (attr->port_num == 0 ||
553 attr->port_num > ibqp->device->phys_port_cnt) {
554 ret = -EINVAL;
555 goto out;
556 }
557 }
558
559 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
560 if (attr->min_rnr_timer > 31) {
561 ret = -EINVAL;
562 goto out;
563 }
564 }
565
566 if (attr_mask & IB_QP_PKEY_INDEX) {
567 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) {
568 ret = -EINVAL;
569 goto out;
570 }
571 }
572
573 if (attr_mask & IB_QP_QKEY)
574 qp->qkey = attr->qkey;
575
576 if (cur_state == next_state && cur_state == IB_QPS_RESET) {
577 ret = 0;
578 goto out;
579 }
580
581 qp->state = next_state;
582 memset(cmd, 0, sizeof(*cmd));
583 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP;
584 cmd->qp_handle = qp->qp_handle;
585 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
586 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state);
587 cmd->attrs.cur_qp_state =
588 ib_qp_state_to_pvrdma(attr->cur_qp_state);
589 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu);
590 cmd->attrs.path_mig_state =
591 ib_mig_state_to_pvrdma(attr->path_mig_state);
592 cmd->attrs.qkey = attr->qkey;
593 cmd->attrs.rq_psn = attr->rq_psn;
594 cmd->attrs.sq_psn = attr->sq_psn;
595 cmd->attrs.dest_qp_num = attr->dest_qp_num;
596 cmd->attrs.qp_access_flags =
597 ib_access_flags_to_pvrdma(attr->qp_access_flags);
598 cmd->attrs.pkey_index = attr->pkey_index;
599 cmd->attrs.alt_pkey_index = attr->alt_pkey_index;
600 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify;
601 cmd->attrs.sq_draining = attr->sq_draining;
602 cmd->attrs.max_rd_atomic = attr->max_rd_atomic;
603 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic;
604 cmd->attrs.min_rnr_timer = attr->min_rnr_timer;
605 cmd->attrs.port_num = attr->port_num;
606 cmd->attrs.timeout = attr->timeout;
607 cmd->attrs.retry_cnt = attr->retry_cnt;
608 cmd->attrs.rnr_retry = attr->rnr_retry;
609 cmd->attrs.alt_port_num = attr->alt_port_num;
610 cmd->attrs.alt_timeout = attr->alt_timeout;
611 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap);
612 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr);
613 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr);
614
615 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP);
616 if (ret < 0) {
617 dev_warn(&dev->pdev->dev,
618 "could not modify queuepair, error: %d\n", ret);
619 } else if (rsp.hdr.err > 0) {
620 dev_warn(&dev->pdev->dev,
621 "cannot modify queuepair, error: %d\n", rsp.hdr.err);
622 ret = -EINVAL;
623 }
624
625 if (ret == 0 && next_state == IB_QPS_RESET)
626 pvrdma_reset_qp(qp);
627
628 out:
629 mutex_unlock(&qp->mutex);
630
631 return ret;
632 }
633
634 static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n)
635 {
636 return pvrdma_page_dir_get_ptr(&qp->pdir,
637 qp->sq.offset + n * qp->sq.wqe_size);
638 }
639
640 static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n)
641 {
642 return pvrdma_page_dir_get_ptr(&qp->pdir,
643 qp->rq.offset + n * qp->rq.wqe_size);
644 }
645
646 static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr,
647 const struct ib_reg_wr *wr)
648 {
649 struct pvrdma_user_mr *mr = to_vmr(wr->mr);
650
651 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova;
652 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma;
653 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift;
654 wqe_hdr->wr.fast_reg.page_list_len = mr->npages;
655 wqe_hdr->wr.fast_reg.length = mr->ibmr.length;
656 wqe_hdr->wr.fast_reg.access_flags = wr->access;
657 wqe_hdr->wr.fast_reg.rkey = wr->key;
658
659 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages,
660 mr->npages);
661 }
662
663 /**
664 * pvrdma_post_send - post send work request entries on a QP
665 * @ibqp: the QP
666 * @wr: work request list to post
667 * @bad_wr: the first bad WR returned
668 *
669 * @return: 0 on success, otherwise errno returned.
670 */
671 int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
672 const struct ib_send_wr **bad_wr)
673 {
674 struct pvrdma_qp *qp = to_vqp(ibqp);
675 struct pvrdma_dev *dev = to_vdev(ibqp->device);
676 unsigned long flags;
677 struct pvrdma_sq_wqe_hdr *wqe_hdr;
678 struct pvrdma_sge *sge;
679 int i, ret;
680
681 /*
682 * In states lower than RTS, we can fail immediately. In other states,
683 * just post and let the device figure it out.
684 */
685 if (qp->state < IB_QPS_RTS) {
686 *bad_wr = wr;
687 return -EINVAL;
688 }
689
690 spin_lock_irqsave(&qp->sq.lock, flags);
691
692 while (wr) {
693 unsigned int tail = 0;
694
695 if (unlikely(!pvrdma_idx_ring_has_space(
696 qp->sq.ring, qp->sq.wqe_cnt, &tail))) {
697 dev_warn_ratelimited(&dev->pdev->dev,
698 "send queue is full\n");
699 *bad_wr = wr;
700 ret = -ENOMEM;
701 goto out;
702 }
703
704 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) {
705 dev_warn_ratelimited(&dev->pdev->dev,
706 "send SGE overflow\n");
707 *bad_wr = wr;
708 ret = -EINVAL;
709 goto out;
710 }
711
712 /*
713 * Only support UD, RC.
714 * Need to check opcode table for thorough checking.
715 * opcode _UD _UC _RC
716 * _SEND x x x
717 * _SEND_WITH_IMM x x x
718 * _RDMA_WRITE x x
719 * _RDMA_WRITE_WITH_IMM x x
720 * _LOCAL_INV x x
721 * _SEND_WITH_INV x x
722 * _RDMA_READ x
723 * _ATOMIC_CMP_AND_SWP x
724 * _ATOMIC_FETCH_AND_ADD x
725 * _MASK_ATOMIC_CMP_AND_SWP x
726 * _MASK_ATOMIC_FETCH_AND_ADD x
727 * _REG_MR x
728 *
729 */
730 if (qp->ibqp.qp_type != IB_QPT_UD &&
731 qp->ibqp.qp_type != IB_QPT_RC &&
732 wr->opcode != IB_WR_SEND) {
733 dev_warn_ratelimited(&dev->pdev->dev,
734 "unsupported queuepair type\n");
735 *bad_wr = wr;
736 ret = -EINVAL;
737 goto out;
738 } else if (qp->ibqp.qp_type == IB_QPT_UD ||
739 qp->ibqp.qp_type == IB_QPT_GSI) {
740 if (wr->opcode != IB_WR_SEND &&
741 wr->opcode != IB_WR_SEND_WITH_IMM) {
742 dev_warn_ratelimited(&dev->pdev->dev,
743 "invalid send opcode\n");
744 *bad_wr = wr;
745 ret = -EINVAL;
746 goto out;
747 }
748 }
749
750 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail);
751 memset(wqe_hdr, 0, sizeof(*wqe_hdr));
752 wqe_hdr->wr_id = wr->wr_id;
753 wqe_hdr->num_sge = wr->num_sge;
754 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode);
755 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags);
756 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
757 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
758 wqe_hdr->ex.imm_data = wr->ex.imm_data;
759
760 if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) {
761 *bad_wr = wr;
762 ret = -EINVAL;
763 goto out;
764 }
765
766 switch (qp->ibqp.qp_type) {
767 case IB_QPT_GSI:
768 case IB_QPT_UD:
769 if (unlikely(!ud_wr(wr)->ah)) {
770 dev_warn_ratelimited(&dev->pdev->dev,
771 "invalid address handle\n");
772 *bad_wr = wr;
773 ret = -EINVAL;
774 goto out;
775 }
776
777 /*
778 * Use qkey from qp context if high order bit set,
779 * otherwise from work request.
780 */
781 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn;
782 wqe_hdr->wr.ud.remote_qkey =
783 ud_wr(wr)->remote_qkey & 0x80000000 ?
784 qp->qkey : ud_wr(wr)->remote_qkey;
785 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av;
786
787 break;
788 case IB_QPT_RC:
789 switch (wr->opcode) {
790 case IB_WR_RDMA_READ:
791 case IB_WR_RDMA_WRITE:
792 case IB_WR_RDMA_WRITE_WITH_IMM:
793 wqe_hdr->wr.rdma.remote_addr =
794 rdma_wr(wr)->remote_addr;
795 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey;
796 break;
797 case IB_WR_LOCAL_INV:
798 case IB_WR_SEND_WITH_INV:
799 wqe_hdr->ex.invalidate_rkey =
800 wr->ex.invalidate_rkey;
801 break;
802 case IB_WR_ATOMIC_CMP_AND_SWP:
803 case IB_WR_ATOMIC_FETCH_AND_ADD:
804 wqe_hdr->wr.atomic.remote_addr =
805 atomic_wr(wr)->remote_addr;
806 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey;
807 wqe_hdr->wr.atomic.compare_add =
808 atomic_wr(wr)->compare_add;
809 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP)
810 wqe_hdr->wr.atomic.swap =
811 atomic_wr(wr)->swap;
812 break;
813 case IB_WR_REG_MR:
814 ret = set_reg_seg(wqe_hdr, reg_wr(wr));
815 if (ret < 0) {
816 dev_warn_ratelimited(&dev->pdev->dev,
817 "Failed to set fast register work request\n");
818 *bad_wr = wr;
819 goto out;
820 }
821 break;
822 default:
823 break;
824 }
825
826 break;
827 default:
828 dev_warn_ratelimited(&dev->pdev->dev,
829 "invalid queuepair type\n");
830 ret = -EINVAL;
831 *bad_wr = wr;
832 goto out;
833 }
834
835 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
836 for (i = 0; i < wr->num_sge; i++) {
837 /* Need to check wqe_size 0 or max size */
838 sge->addr = wr->sg_list[i].addr;
839 sge->length = wr->sg_list[i].length;
840 sge->lkey = wr->sg_list[i].lkey;
841 sge++;
842 }
843
844 /* Make sure wqe is written before index update */
845 smp_wmb();
846
847 /* Update shared sq ring */
848 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail,
849 qp->sq.wqe_cnt);
850
851 wr = wr->next;
852 }
853
854 ret = 0;
855
856 out:
857 spin_unlock_irqrestore(&qp->sq.lock, flags);
858
859 if (!ret)
860 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle);
861
862 return ret;
863 }
864
865 /**
866 * pvrdma_post_recv - post receive work request entries on a QP
867 * @ibqp: the QP
868 * @wr: the work request list to post
869 * @bad_wr: the first bad WR returned
870 *
871 * @return: 0 on success, otherwise errno returned.
872 */
873 int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
874 const struct ib_recv_wr **bad_wr)
875 {
876 struct pvrdma_dev *dev = to_vdev(ibqp->device);
877 unsigned long flags;
878 struct pvrdma_qp *qp = to_vqp(ibqp);
879 struct pvrdma_rq_wqe_hdr *wqe_hdr;
880 struct pvrdma_sge *sge;
881 int ret = 0;
882 int i;
883
884 /*
885 * In the RESET state, we can fail immediately. For other states,
886 * just post and let the device figure it out.
887 */
888 if (qp->state == IB_QPS_RESET) {
889 *bad_wr = wr;
890 return -EINVAL;
891 }
892
893 if (qp->srq) {
894 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n");
895 *bad_wr = wr;
896 return -EINVAL;
897 }
898
899 spin_lock_irqsave(&qp->rq.lock, flags);
900
901 while (wr) {
902 unsigned int tail = 0;
903
904 if (unlikely(wr->num_sge > qp->rq.max_sg ||
905 wr->num_sge < 0)) {
906 ret = -EINVAL;
907 *bad_wr = wr;
908 dev_warn_ratelimited(&dev->pdev->dev,
909 "recv SGE overflow\n");
910 goto out;
911 }
912
913 if (unlikely(!pvrdma_idx_ring_has_space(
914 qp->rq.ring, qp->rq.wqe_cnt, &tail))) {
915 ret = -ENOMEM;
916 *bad_wr = wr;
917 dev_warn_ratelimited(&dev->pdev->dev,
918 "recv queue full\n");
919 goto out;
920 }
921
922 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail);
923 wqe_hdr->wr_id = wr->wr_id;
924 wqe_hdr->num_sge = wr->num_sge;
925 wqe_hdr->total_len = 0;
926
927 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
928 for (i = 0; i < wr->num_sge; i++) {
929 sge->addr = wr->sg_list[i].addr;
930 sge->length = wr->sg_list[i].length;
931 sge->lkey = wr->sg_list[i].lkey;
932 sge++;
933 }
934
935 /* Make sure wqe is written before index update */
936 smp_wmb();
937
938 /* Update shared rq ring */
939 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail,
940 qp->rq.wqe_cnt);
941
942 wr = wr->next;
943 }
944
945 spin_unlock_irqrestore(&qp->rq.lock, flags);
946
947 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle);
948
949 return ret;
950
951 out:
952 spin_unlock_irqrestore(&qp->rq.lock, flags);
953
954 return ret;
955 }
956
957 /**
958 * pvrdma_query_qp - query a queue pair's attributes
959 * @ibqp: the queue pair to query
960 * @attr: the queue pair's attributes
961 * @attr_mask: attributes mask
962 * @init_attr: initial queue pair attributes
963 *
964 * @returns 0 on success, otherwise returns an errno.
965 */
966 int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
967 int attr_mask, struct ib_qp_init_attr *init_attr)
968 {
969 struct pvrdma_dev *dev = to_vdev(ibqp->device);
970 struct pvrdma_qp *qp = to_vqp(ibqp);
971 union pvrdma_cmd_req req;
972 union pvrdma_cmd_resp rsp;
973 struct pvrdma_cmd_query_qp *cmd = &req.query_qp;
974 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp;
975 int ret = 0;
976
977 mutex_lock(&qp->mutex);
978
979 if (qp->state == IB_QPS_RESET) {
980 attr->qp_state = IB_QPS_RESET;
981 goto out;
982 }
983
984 memset(cmd, 0, sizeof(*cmd));
985 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP;
986 cmd->qp_handle = qp->qp_handle;
987 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
988
989 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP);
990 if (ret < 0) {
991 dev_warn(&dev->pdev->dev,
992 "could not query queuepair, error: %d\n", ret);
993 goto out;
994 }
995
996 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state);
997 attr->cur_qp_state =
998 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state);
999 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu);
1000 attr->path_mig_state =
1001 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state);
1002 attr->qkey = resp->attrs.qkey;
1003 attr->rq_psn = resp->attrs.rq_psn;
1004 attr->sq_psn = resp->attrs.sq_psn;
1005 attr->dest_qp_num = resp->attrs.dest_qp_num;
1006 attr->qp_access_flags =
1007 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags);
1008 attr->pkey_index = resp->attrs.pkey_index;
1009 attr->alt_pkey_index = resp->attrs.alt_pkey_index;
1010 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify;
1011 attr->sq_draining = resp->attrs.sq_draining;
1012 attr->max_rd_atomic = resp->attrs.max_rd_atomic;
1013 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic;
1014 attr->min_rnr_timer = resp->attrs.min_rnr_timer;
1015 attr->port_num = resp->attrs.port_num;
1016 attr->timeout = resp->attrs.timeout;
1017 attr->retry_cnt = resp->attrs.retry_cnt;
1018 attr->rnr_retry = resp->attrs.rnr_retry;
1019 attr->alt_port_num = resp->attrs.alt_port_num;
1020 attr->alt_timeout = resp->attrs.alt_timeout;
1021 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap);
1022 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr);
1023 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr);
1024
1025 qp->state = attr->qp_state;
1026
1027 ret = 0;
1028
1029 out:
1030 attr->cur_qp_state = attr->qp_state;
1031
1032 init_attr->event_handler = qp->ibqp.event_handler;
1033 init_attr->qp_context = qp->ibqp.qp_context;
1034 init_attr->send_cq = qp->ibqp.send_cq;
1035 init_attr->recv_cq = qp->ibqp.recv_cq;
1036 init_attr->srq = qp->ibqp.srq;
1037 init_attr->xrcd = NULL;
1038 init_attr->cap = attr->cap;
1039 init_attr->sq_sig_type = 0;
1040 init_attr->qp_type = qp->ibqp.qp_type;
1041 init_attr->create_flags = 0;
1042 init_attr->port_num = qp->port;
1043
1044 mutex_unlock(&qp->mutex);
1045 return ret;
1046 }
Kernel DRM miscellaneous fixes and cross-tree changes