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Merge tag 'dma-mapping-5.14' of git://git.infradead.org/users/hch/dma-mapping
[mirror_ubuntu-jammy-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 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(-EOPNOTSUPP);
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(-EOPNOTSUPP);
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 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n");
237 ret = -EINVAL;
238 goto err_qp;
239 }
240 fallthrough;
241 case IB_QPT_RC:
242 case IB_QPT_UD:
243 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
244 if (!qp) {
245 ret = -ENOMEM;
246 goto err_qp;
247 }
248
249 spin_lock_init(&qp->sq.lock);
250 spin_lock_init(&qp->rq.lock);
251 mutex_init(&qp->mutex);
252 refcount_set(&qp->refcnt, 1);
253 init_completion(&qp->free);
254
255 qp->state = IB_QPS_RESET;
256 qp->is_kernel = !udata;
257
258 if (!qp->is_kernel) {
259 dev_dbg(&dev->pdev->dev,
260 "create queuepair from user space\n");
261
262 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
263 ret = -EFAULT;
264 goto err_qp;
265 }
266
267 /* Userspace supports qpn and qp handles? */
268 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION &&
269 udata->outlen < sizeof(qp_resp)) {
270 dev_warn(&dev->pdev->dev,
271 "create queuepair not supported\n");
272 ret = -EOPNOTSUPP;
273 goto err_qp;
274 }
275
276 if (!is_srq) {
277 /* set qp->sq.wqe_cnt, shift, buf_size.. */
278 qp->rumem =
279 ib_umem_get(pd->device, ucmd.rbuf_addr,
280 ucmd.rbuf_size, 0);
281 if (IS_ERR(qp->rumem)) {
282 ret = PTR_ERR(qp->rumem);
283 goto err_qp;
284 }
285 qp->srq = NULL;
286 } else {
287 qp->rumem = NULL;
288 qp->srq = to_vsrq(init_attr->srq);
289 }
290
291 qp->sumem = ib_umem_get(pd->device, ucmd.sbuf_addr,
292 ucmd.sbuf_size, 0);
293 if (IS_ERR(qp->sumem)) {
294 if (!is_srq)
295 ib_umem_release(qp->rumem);
296 ret = PTR_ERR(qp->sumem);
297 goto err_qp;
298 }
299
300 qp->npages_send =
301 ib_umem_num_dma_blocks(qp->sumem, PAGE_SIZE);
302 if (!is_srq)
303 qp->npages_recv = ib_umem_num_dma_blocks(
304 qp->rumem, PAGE_SIZE);
305 else
306 qp->npages_recv = 0;
307 qp->npages = qp->npages_send + qp->npages_recv;
308 } else {
309 ret = pvrdma_set_sq_size(to_vdev(pd->device),
310 &init_attr->cap, qp);
311 if (ret)
312 goto err_qp;
313
314 ret = pvrdma_set_rq_size(to_vdev(pd->device),
315 &init_attr->cap, qp);
316 if (ret)
317 goto err_qp;
318
319 qp->npages = qp->npages_send + qp->npages_recv;
320
321 /* Skip header page. */
322 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE;
323
324 /* Recv queue pages are after send pages. */
325 qp->rq.offset = qp->npages_send * PAGE_SIZE;
326 }
327
328 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
329 dev_warn(&dev->pdev->dev,
330 "overflow pages in queuepair\n");
331 ret = -EINVAL;
332 goto err_umem;
333 }
334
335 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages,
336 qp->is_kernel);
337 if (ret) {
338 dev_warn(&dev->pdev->dev,
339 "could not allocate page directory\n");
340 goto err_umem;
341 }
342
343 if (!qp->is_kernel) {
344 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0);
345 if (!is_srq)
346 pvrdma_page_dir_insert_umem(&qp->pdir,
347 qp->rumem,
348 qp->npages_send);
349 } else {
350 /* Ring state is always the first page. */
351 qp->sq.ring = qp->pdir.pages[0];
352 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1];
353 }
354 break;
355 default:
356 ret = -EINVAL;
357 goto err_qp;
358 }
359
360 /* Not supported */
361 init_attr->cap.max_inline_data = 0;
362
363 memset(cmd, 0, sizeof(*cmd));
364 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP;
365 cmd->pd_handle = to_vpd(pd)->pd_handle;
366 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle;
367 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle;
368 if (is_srq)
369 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle;
370 else
371 cmd->srq_handle = 0;
372 cmd->max_send_wr = init_attr->cap.max_send_wr;
373 cmd->max_recv_wr = init_attr->cap.max_recv_wr;
374 cmd->max_send_sge = init_attr->cap.max_send_sge;
375 cmd->max_recv_sge = init_attr->cap.max_recv_sge;
376 cmd->max_inline_data = init_attr->cap.max_inline_data;
377 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
378 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type);
379 cmd->is_srq = is_srq;
380 cmd->lkey = 0;
381 cmd->access_flags = IB_ACCESS_LOCAL_WRITE;
382 cmd->total_chunks = qp->npages;
383 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES;
384 cmd->pdir_dma = qp->pdir.dir_dma;
385
386 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n",
387 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge,
388 cmd->max_recv_sge);
389
390 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP);
391 if (ret < 0) {
392 dev_warn(&dev->pdev->dev,
393 "could not create queuepair, error: %d\n", ret);
394 goto err_pdir;
395 }
396
397 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */
398 qp->port = init_attr->port_num;
399
400 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION) {
401 qp->ibqp.qp_num = resp_v2->qpn;
402 qp->qp_handle = resp_v2->qp_handle;
403 } else {
404 qp->ibqp.qp_num = resp->qpn;
405 qp->qp_handle = resp->qpn;
406 }
407
408 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
409 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp;
410 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
411
412 if (udata) {
413 qp_resp.qpn = qp->ibqp.qp_num;
414 qp_resp.qp_handle = qp->qp_handle;
415
416 if (ib_copy_to_udata(udata, &qp_resp,
417 min(udata->outlen, sizeof(qp_resp)))) {
418 dev_warn(&dev->pdev->dev,
419 "failed to copy back udata\n");
420 __pvrdma_destroy_qp(dev, qp);
421 return ERR_PTR(-EINVAL);
422 }
423 }
424
425 return &qp->ibqp;
426
427 err_pdir:
428 pvrdma_page_dir_cleanup(dev, &qp->pdir);
429 err_umem:
430 ib_umem_release(qp->rumem);
431 ib_umem_release(qp->sumem);
432 err_qp:
433 kfree(qp);
434 atomic_dec(&dev->num_qps);
435
436 return ERR_PTR(ret);
437 }
438
439 static void _pvrdma_free_qp(struct pvrdma_qp *qp)
440 {
441 unsigned long flags;
442 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device);
443
444 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
445 dev->qp_tbl[qp->qp_handle] = NULL;
446 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
447
448 if (refcount_dec_and_test(&qp->refcnt))
449 complete(&qp->free);
450 wait_for_completion(&qp->free);
451
452 ib_umem_release(qp->rumem);
453 ib_umem_release(qp->sumem);
454
455 pvrdma_page_dir_cleanup(dev, &qp->pdir);
456
457 kfree(qp);
458
459 atomic_dec(&dev->num_qps);
460 }
461
462 static void pvrdma_free_qp(struct pvrdma_qp *qp)
463 {
464 struct pvrdma_cq *scq;
465 struct pvrdma_cq *rcq;
466 unsigned long scq_flags, rcq_flags;
467
468 /* In case cq is polling */
469 get_cqs(qp, &scq, &rcq);
470 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
471
472 _pvrdma_flush_cqe(qp, scq);
473 if (scq != rcq)
474 _pvrdma_flush_cqe(qp, rcq);
475
476 /*
477 * We're now unlocking the CQs before clearing out the qp handle this
478 * should still be safe. We have destroyed the backend QP and flushed
479 * the CQEs so there should be no other completions for this QP.
480 */
481 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
482
483 _pvrdma_free_qp(qp);
484 }
485
486 static inline void _pvrdma_destroy_qp_work(struct pvrdma_dev *dev,
487 u32 qp_handle)
488 {
489 union pvrdma_cmd_req req;
490 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp;
491 int ret;
492
493 memset(cmd, 0, sizeof(*cmd));
494 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP;
495 cmd->qp_handle = qp_handle;
496
497 ret = pvrdma_cmd_post(dev, &req, NULL, 0);
498 if (ret < 0)
499 dev_warn(&dev->pdev->dev,
500 "destroy queuepair failed, error: %d\n", ret);
501 }
502
503 /**
504 * pvrdma_destroy_qp - destroy a queue pair
505 * @qp: the queue pair to destroy
506 * @udata: user data or null for kernel object
507 *
508 * @return: always 0.
509 */
510 int pvrdma_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
511 {
512 struct pvrdma_qp *vqp = to_vqp(qp);
513
514 _pvrdma_destroy_qp_work(to_vdev(qp->device), vqp->qp_handle);
515 pvrdma_free_qp(vqp);
516
517 return 0;
518 }
519
520 static void __pvrdma_destroy_qp(struct pvrdma_dev *dev,
521 struct pvrdma_qp *qp)
522 {
523 _pvrdma_destroy_qp_work(dev, qp->qp_handle);
524 _pvrdma_free_qp(qp);
525 }
526
527 /**
528 * pvrdma_modify_qp - modify queue pair attributes
529 * @ibqp: the queue pair
530 * @attr: the new queue pair's attributes
531 * @attr_mask: attributes mask
532 * @udata: user data
533 *
534 * @returns 0 on success, otherwise returns an errno.
535 */
536 int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
537 int attr_mask, struct ib_udata *udata)
538 {
539 struct pvrdma_dev *dev = to_vdev(ibqp->device);
540 struct pvrdma_qp *qp = to_vqp(ibqp);
541 union pvrdma_cmd_req req;
542 union pvrdma_cmd_resp rsp;
543 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp;
544 enum ib_qp_state cur_state, next_state;
545 int ret;
546
547 if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
548 return -EOPNOTSUPP;
549
550 /* Sanity checking. Should need lock here */
551 mutex_lock(&qp->mutex);
552 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state :
553 qp->state;
554 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state;
555
556 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type,
557 attr_mask)) {
558 ret = -EINVAL;
559 goto out;
560 }
561
562 if (attr_mask & IB_QP_PORT) {
563 if (attr->port_num == 0 ||
564 attr->port_num > ibqp->device->phys_port_cnt) {
565 ret = -EINVAL;
566 goto out;
567 }
568 }
569
570 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
571 if (attr->min_rnr_timer > 31) {
572 ret = -EINVAL;
573 goto out;
574 }
575 }
576
577 if (attr_mask & IB_QP_PKEY_INDEX) {
578 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) {
579 ret = -EINVAL;
580 goto out;
581 }
582 }
583
584 if (attr_mask & IB_QP_QKEY)
585 qp->qkey = attr->qkey;
586
587 if (cur_state == next_state && cur_state == IB_QPS_RESET) {
588 ret = 0;
589 goto out;
590 }
591
592 qp->state = next_state;
593 memset(cmd, 0, sizeof(*cmd));
594 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP;
595 cmd->qp_handle = qp->qp_handle;
596 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
597 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state);
598 cmd->attrs.cur_qp_state =
599 ib_qp_state_to_pvrdma(attr->cur_qp_state);
600 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu);
601 cmd->attrs.path_mig_state =
602 ib_mig_state_to_pvrdma(attr->path_mig_state);
603 cmd->attrs.qkey = attr->qkey;
604 cmd->attrs.rq_psn = attr->rq_psn;
605 cmd->attrs.sq_psn = attr->sq_psn;
606 cmd->attrs.dest_qp_num = attr->dest_qp_num;
607 cmd->attrs.qp_access_flags =
608 ib_access_flags_to_pvrdma(attr->qp_access_flags);
609 cmd->attrs.pkey_index = attr->pkey_index;
610 cmd->attrs.alt_pkey_index = attr->alt_pkey_index;
611 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify;
612 cmd->attrs.sq_draining = attr->sq_draining;
613 cmd->attrs.max_rd_atomic = attr->max_rd_atomic;
614 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic;
615 cmd->attrs.min_rnr_timer = attr->min_rnr_timer;
616 cmd->attrs.port_num = attr->port_num;
617 cmd->attrs.timeout = attr->timeout;
618 cmd->attrs.retry_cnt = attr->retry_cnt;
619 cmd->attrs.rnr_retry = attr->rnr_retry;
620 cmd->attrs.alt_port_num = attr->alt_port_num;
621 cmd->attrs.alt_timeout = attr->alt_timeout;
622 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap);
623 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr);
624 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr);
625
626 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP);
627 if (ret < 0) {
628 dev_warn(&dev->pdev->dev,
629 "could not modify queuepair, error: %d\n", ret);
630 } else if (rsp.hdr.err > 0) {
631 dev_warn(&dev->pdev->dev,
632 "cannot modify queuepair, error: %d\n", rsp.hdr.err);
633 ret = -EINVAL;
634 }
635
636 if (ret == 0 && next_state == IB_QPS_RESET)
637 pvrdma_reset_qp(qp);
638
639 out:
640 mutex_unlock(&qp->mutex);
641
642 return ret;
643 }
644
645 static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n)
646 {
647 return pvrdma_page_dir_get_ptr(&qp->pdir,
648 qp->sq.offset + n * qp->sq.wqe_size);
649 }
650
651 static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n)
652 {
653 return pvrdma_page_dir_get_ptr(&qp->pdir,
654 qp->rq.offset + n * qp->rq.wqe_size);
655 }
656
657 static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr,
658 const struct ib_reg_wr *wr)
659 {
660 struct pvrdma_user_mr *mr = to_vmr(wr->mr);
661
662 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova;
663 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma;
664 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift;
665 wqe_hdr->wr.fast_reg.page_list_len = mr->npages;
666 wqe_hdr->wr.fast_reg.length = mr->ibmr.length;
667 wqe_hdr->wr.fast_reg.access_flags = wr->access;
668 wqe_hdr->wr.fast_reg.rkey = wr->key;
669
670 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages,
671 mr->npages);
672 }
673
674 /**
675 * pvrdma_post_send - post send work request entries on a QP
676 * @ibqp: the QP
677 * @wr: work request list to post
678 * @bad_wr: the first bad WR returned
679 *
680 * @return: 0 on success, otherwise errno returned.
681 */
682 int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
683 const struct ib_send_wr **bad_wr)
684 {
685 struct pvrdma_qp *qp = to_vqp(ibqp);
686 struct pvrdma_dev *dev = to_vdev(ibqp->device);
687 unsigned long flags;
688 struct pvrdma_sq_wqe_hdr *wqe_hdr;
689 struct pvrdma_sge *sge;
690 int i, ret;
691
692 /*
693 * In states lower than RTS, we can fail immediately. In other states,
694 * just post and let the device figure it out.
695 */
696 if (qp->state < IB_QPS_RTS) {
697 *bad_wr = wr;
698 return -EINVAL;
699 }
700
701 spin_lock_irqsave(&qp->sq.lock, flags);
702
703 while (wr) {
704 unsigned int tail = 0;
705
706 if (unlikely(!pvrdma_idx_ring_has_space(
707 qp->sq.ring, qp->sq.wqe_cnt, &tail))) {
708 dev_warn_ratelimited(&dev->pdev->dev,
709 "send queue is full\n");
710 *bad_wr = wr;
711 ret = -ENOMEM;
712 goto out;
713 }
714
715 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) {
716 dev_warn_ratelimited(&dev->pdev->dev,
717 "send SGE overflow\n");
718 *bad_wr = wr;
719 ret = -EINVAL;
720 goto out;
721 }
722
723 if (unlikely(wr->opcode < 0)) {
724 dev_warn_ratelimited(&dev->pdev->dev,
725 "invalid send opcode\n");
726 *bad_wr = wr;
727 ret = -EINVAL;
728 goto out;
729 }
730
731 /*
732 * Only support UD, RC.
733 * Need to check opcode table for thorough checking.
734 * opcode _UD _UC _RC
735 * _SEND x x x
736 * _SEND_WITH_IMM x x x
737 * _RDMA_WRITE x x
738 * _RDMA_WRITE_WITH_IMM x x
739 * _LOCAL_INV x x
740 * _SEND_WITH_INV x x
741 * _RDMA_READ x
742 * _ATOMIC_CMP_AND_SWP x
743 * _ATOMIC_FETCH_AND_ADD x
744 * _MASK_ATOMIC_CMP_AND_SWP x
745 * _MASK_ATOMIC_FETCH_AND_ADD x
746 * _REG_MR x
747 *
748 */
749 if (qp->ibqp.qp_type != IB_QPT_UD &&
750 qp->ibqp.qp_type != IB_QPT_RC &&
751 wr->opcode != IB_WR_SEND) {
752 dev_warn_ratelimited(&dev->pdev->dev,
753 "unsupported queuepair type\n");
754 *bad_wr = wr;
755 ret = -EINVAL;
756 goto out;
757 } else if (qp->ibqp.qp_type == IB_QPT_UD ||
758 qp->ibqp.qp_type == IB_QPT_GSI) {
759 if (wr->opcode != IB_WR_SEND &&
760 wr->opcode != IB_WR_SEND_WITH_IMM) {
761 dev_warn_ratelimited(&dev->pdev->dev,
762 "invalid send opcode\n");
763 *bad_wr = wr;
764 ret = -EINVAL;
765 goto out;
766 }
767 }
768
769 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail);
770 memset(wqe_hdr, 0, sizeof(*wqe_hdr));
771 wqe_hdr->wr_id = wr->wr_id;
772 wqe_hdr->num_sge = wr->num_sge;
773 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode);
774 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags);
775 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
776 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
777 wqe_hdr->ex.imm_data = wr->ex.imm_data;
778
779 if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) {
780 *bad_wr = wr;
781 ret = -EINVAL;
782 goto out;
783 }
784
785 switch (qp->ibqp.qp_type) {
786 case IB_QPT_GSI:
787 case IB_QPT_UD:
788 if (unlikely(!ud_wr(wr)->ah)) {
789 dev_warn_ratelimited(&dev->pdev->dev,
790 "invalid address handle\n");
791 *bad_wr = wr;
792 ret = -EINVAL;
793 goto out;
794 }
795
796 /*
797 * Use qkey from qp context if high order bit set,
798 * otherwise from work request.
799 */
800 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn;
801 wqe_hdr->wr.ud.remote_qkey =
802 ud_wr(wr)->remote_qkey & 0x80000000 ?
803 qp->qkey : ud_wr(wr)->remote_qkey;
804 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av;
805
806 break;
807 case IB_QPT_RC:
808 switch (wr->opcode) {
809 case IB_WR_RDMA_READ:
810 case IB_WR_RDMA_WRITE:
811 case IB_WR_RDMA_WRITE_WITH_IMM:
812 wqe_hdr->wr.rdma.remote_addr =
813 rdma_wr(wr)->remote_addr;
814 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey;
815 break;
816 case IB_WR_LOCAL_INV:
817 case IB_WR_SEND_WITH_INV:
818 wqe_hdr->ex.invalidate_rkey =
819 wr->ex.invalidate_rkey;
820 break;
821 case IB_WR_ATOMIC_CMP_AND_SWP:
822 case IB_WR_ATOMIC_FETCH_AND_ADD:
823 wqe_hdr->wr.atomic.remote_addr =
824 atomic_wr(wr)->remote_addr;
825 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey;
826 wqe_hdr->wr.atomic.compare_add =
827 atomic_wr(wr)->compare_add;
828 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP)
829 wqe_hdr->wr.atomic.swap =
830 atomic_wr(wr)->swap;
831 break;
832 case IB_WR_REG_MR:
833 ret = set_reg_seg(wqe_hdr, reg_wr(wr));
834 if (ret < 0) {
835 dev_warn_ratelimited(&dev->pdev->dev,
836 "Failed to set fast register work request\n");
837 *bad_wr = wr;
838 goto out;
839 }
840 break;
841 default:
842 break;
843 }
844
845 break;
846 default:
847 dev_warn_ratelimited(&dev->pdev->dev,
848 "invalid queuepair type\n");
849 ret = -EINVAL;
850 *bad_wr = wr;
851 goto out;
852 }
853
854 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
855 for (i = 0; i < wr->num_sge; i++) {
856 /* Need to check wqe_size 0 or max size */
857 sge->addr = wr->sg_list[i].addr;
858 sge->length = wr->sg_list[i].length;
859 sge->lkey = wr->sg_list[i].lkey;
860 sge++;
861 }
862
863 /* Make sure wqe is written before index update */
864 smp_wmb();
865
866 /* Update shared sq ring */
867 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail,
868 qp->sq.wqe_cnt);
869
870 wr = wr->next;
871 }
872
873 ret = 0;
874
875 out:
876 spin_unlock_irqrestore(&qp->sq.lock, flags);
877
878 if (!ret)
879 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle);
880
881 return ret;
882 }
883
884 /**
885 * pvrdma_post_recv - post receive work request entries on a QP
886 * @ibqp: the QP
887 * @wr: the work request list to post
888 * @bad_wr: the first bad WR returned
889 *
890 * @return: 0 on success, otherwise errno returned.
891 */
892 int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
893 const struct ib_recv_wr **bad_wr)
894 {
895 struct pvrdma_dev *dev = to_vdev(ibqp->device);
896 unsigned long flags;
897 struct pvrdma_qp *qp = to_vqp(ibqp);
898 struct pvrdma_rq_wqe_hdr *wqe_hdr;
899 struct pvrdma_sge *sge;
900 int ret = 0;
901 int i;
902
903 /*
904 * In the RESET state, we can fail immediately. For other states,
905 * just post and let the device figure it out.
906 */
907 if (qp->state == IB_QPS_RESET) {
908 *bad_wr = wr;
909 return -EINVAL;
910 }
911
912 if (qp->srq) {
913 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n");
914 *bad_wr = wr;
915 return -EINVAL;
916 }
917
918 spin_lock_irqsave(&qp->rq.lock, flags);
919
920 while (wr) {
921 unsigned int tail = 0;
922
923 if (unlikely(wr->num_sge > qp->rq.max_sg ||
924 wr->num_sge < 0)) {
925 ret = -EINVAL;
926 *bad_wr = wr;
927 dev_warn_ratelimited(&dev->pdev->dev,
928 "recv SGE overflow\n");
929 goto out;
930 }
931
932 if (unlikely(!pvrdma_idx_ring_has_space(
933 qp->rq.ring, qp->rq.wqe_cnt, &tail))) {
934 ret = -ENOMEM;
935 *bad_wr = wr;
936 dev_warn_ratelimited(&dev->pdev->dev,
937 "recv queue full\n");
938 goto out;
939 }
940
941 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail);
942 wqe_hdr->wr_id = wr->wr_id;
943 wqe_hdr->num_sge = wr->num_sge;
944 wqe_hdr->total_len = 0;
945
946 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
947 for (i = 0; i < wr->num_sge; i++) {
948 sge->addr = wr->sg_list[i].addr;
949 sge->length = wr->sg_list[i].length;
950 sge->lkey = wr->sg_list[i].lkey;
951 sge++;
952 }
953
954 /* Make sure wqe is written before index update */
955 smp_wmb();
956
957 /* Update shared rq ring */
958 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail,
959 qp->rq.wqe_cnt);
960
961 wr = wr->next;
962 }
963
964 spin_unlock_irqrestore(&qp->rq.lock, flags);
965
966 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle);
967
968 return ret;
969
970 out:
971 spin_unlock_irqrestore(&qp->rq.lock, flags);
972
973 return ret;
974 }
975
976 /**
977 * pvrdma_query_qp - query a queue pair's attributes
978 * @ibqp: the queue pair to query
979 * @attr: the queue pair's attributes
980 * @attr_mask: attributes mask
981 * @init_attr: initial queue pair attributes
982 *
983 * @returns 0 on success, otherwise returns an errno.
984 */
985 int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
986 int attr_mask, struct ib_qp_init_attr *init_attr)
987 {
988 struct pvrdma_dev *dev = to_vdev(ibqp->device);
989 struct pvrdma_qp *qp = to_vqp(ibqp);
990 union pvrdma_cmd_req req;
991 union pvrdma_cmd_resp rsp;
992 struct pvrdma_cmd_query_qp *cmd = &req.query_qp;
993 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp;
994 int ret = 0;
995
996 mutex_lock(&qp->mutex);
997
998 if (qp->state == IB_QPS_RESET) {
999 attr->qp_state = IB_QPS_RESET;
1000 goto out;
1001 }
1002
1003 memset(cmd, 0, sizeof(*cmd));
1004 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP;
1005 cmd->qp_handle = qp->qp_handle;
1006 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
1007
1008 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP);
1009 if (ret < 0) {
1010 dev_warn(&dev->pdev->dev,
1011 "could not query queuepair, error: %d\n", ret);
1012 goto out;
1013 }
1014
1015 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state);
1016 attr->cur_qp_state =
1017 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state);
1018 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu);
1019 attr->path_mig_state =
1020 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state);
1021 attr->qkey = resp->attrs.qkey;
1022 attr->rq_psn = resp->attrs.rq_psn;
1023 attr->sq_psn = resp->attrs.sq_psn;
1024 attr->dest_qp_num = resp->attrs.dest_qp_num;
1025 attr->qp_access_flags =
1026 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags);
1027 attr->pkey_index = resp->attrs.pkey_index;
1028 attr->alt_pkey_index = resp->attrs.alt_pkey_index;
1029 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify;
1030 attr->sq_draining = resp->attrs.sq_draining;
1031 attr->max_rd_atomic = resp->attrs.max_rd_atomic;
1032 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic;
1033 attr->min_rnr_timer = resp->attrs.min_rnr_timer;
1034 attr->port_num = resp->attrs.port_num;
1035 attr->timeout = resp->attrs.timeout;
1036 attr->retry_cnt = resp->attrs.retry_cnt;
1037 attr->rnr_retry = resp->attrs.rnr_retry;
1038 attr->alt_port_num = resp->attrs.alt_port_num;
1039 attr->alt_timeout = resp->attrs.alt_timeout;
1040 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap);
1041 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr);
1042 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr);
1043
1044 qp->state = attr->qp_state;
1045
1046 ret = 0;
1047
1048 out:
1049 attr->cur_qp_state = attr->qp_state;
1050
1051 init_attr->event_handler = qp->ibqp.event_handler;
1052 init_attr->qp_context = qp->ibqp.qp_context;
1053 init_attr->send_cq = qp->ibqp.send_cq;
1054 init_attr->recv_cq = qp->ibqp.recv_cq;
1055 init_attr->srq = qp->ibqp.srq;
1056 init_attr->xrcd = NULL;
1057 init_attr->cap = attr->cap;
1058 init_attr->sq_sig_type = 0;
1059 init_attr->qp_type = qp->ibqp.qp_type;
1060 init_attr->create_flags = 0;
1061 init_attr->port_num = qp->port;
1062
1063 mutex_unlock(&qp->mutex);
1064 return ret;
1065 }
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