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[mirror_ubuntu-focal-kernel.git] / drivers / infiniband / hw / vmw_pvrdma / pvrdma_qp.c
CommitLineData
29c8d9eb
AR		 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
55static inline void get_cqs(struct pvrdma_qp *qp, struct pvrdma_cq **send_cq,
56 struct pvrdma_cq **recv_cq)
57{
58 *send_cq = to_vcq(qp->ibqp.send_cq);
59 *recv_cq = to_vcq(qp->ibqp.recv_cq);
60}
61
62static void pvrdma_lock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq,
63 unsigned long *scq_flags,
64 unsigned long *rcq_flags)
65 __acquires(scq->cq_lock) __acquires(rcq->cq_lock)
66{
67 if (scq == rcq) {
68 spin_lock_irqsave(&scq->cq_lock, *scq_flags);
69 __acquire(rcq->cq_lock);
70 } else if (scq->cq_handle < rcq->cq_handle) {
71 spin_lock_irqsave(&scq->cq_lock, *scq_flags);
72 spin_lock_irqsave_nested(&rcq->cq_lock, *rcq_flags,
73 SINGLE_DEPTH_NESTING);
74 } else {
75 spin_lock_irqsave(&rcq->cq_lock, *rcq_flags);
76 spin_lock_irqsave_nested(&scq->cq_lock, *scq_flags,
77 SINGLE_DEPTH_NESTING);
78 }
79}
80
81static void pvrdma_unlock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq,
82 unsigned long *scq_flags,
83 unsigned long *rcq_flags)
84 __releases(scq->cq_lock) __releases(rcq->cq_lock)
85{
86 if (scq == rcq) {
87 __release(rcq->cq_lock);
88 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
89 } else if (scq->cq_handle < rcq->cq_handle) {
90 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
91 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
92 } else {
93 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
94 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
95 }
96}
97
98static void pvrdma_reset_qp(struct pvrdma_qp *qp)
99{
100 struct pvrdma_cq *scq, *rcq;
101 unsigned long scq_flags, rcq_flags;
102
103 /* Clean up cqes */
104 get_cqs(qp, &scq, &rcq);
105 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
106
107 _pvrdma_flush_cqe(qp, scq);
108 if (scq != rcq)
109 _pvrdma_flush_cqe(qp, rcq);
110
111 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
112
113 /*
114 * Reset queuepair. The checks are because usermode queuepairs won't
115 * have kernel ringstates.
116 */
117 if (qp->rq.ring) {
118 atomic_set(&qp->rq.ring->cons_head, 0);
119 atomic_set(&qp->rq.ring->prod_tail, 0);
120 }
121 if (qp->sq.ring) {
122 atomic_set(&qp->sq.ring->cons_head, 0);
123 atomic_set(&qp->sq.ring->prod_tail, 0);
124 }
125}
126
127static int pvrdma_set_rq_size(struct pvrdma_dev *dev,
128 struct ib_qp_cap *req_cap,
129 struct pvrdma_qp *qp)
130{
131 if (req_cap->max_recv_wr > dev->dsr->caps.max_qp_wr ||
132 req_cap->max_recv_sge > dev->dsr->caps.max_sge) {
133 dev_warn(&dev->pdev->dev, "recv queue size invalid\n");
134 return -EINVAL;
135 }
136
137 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_recv_wr));
138 qp->rq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_recv_sge));
139
140 /* Write back */
141 req_cap->max_recv_wr = qp->rq.wqe_cnt;
142 req_cap->max_recv_sge = qp->rq.max_sg;
143
144 qp->rq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_rq_wqe_hdr) +
145 sizeof(struct pvrdma_sge) *
146 qp->rq.max_sg);
147 qp->npages_recv = (qp->rq.wqe_cnt * qp->rq.wqe_size + PAGE_SIZE - 1) /
148 PAGE_SIZE;
149
150 return 0;
151}
152
153static int pvrdma_set_sq_size(struct pvrdma_dev *dev, struct ib_qp_cap *req_cap,
1dd70ea3 154 struct pvrdma_qp *qp)
29c8d9eb
AR		 155{
156 if (req_cap->max_send_wr > dev->dsr->caps.max_qp_wr ||
157 req_cap->max_send_sge > dev->dsr->caps.max_sge) {
158 dev_warn(&dev->pdev->dev, "send queue size invalid\n");
159 return -EINVAL;
160 }
161
162 qp->sq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_send_wr));
163 qp->sq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_send_sge));
164
165 /* Write back */
166 req_cap->max_send_wr = qp->sq.wqe_cnt;
167 req_cap->max_send_sge = qp->sq.max_sg;
168
169 qp->sq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_sq_wqe_hdr) +
170 sizeof(struct pvrdma_sge) *
171 qp->sq.max_sg);
172 /* Note: one extra page for the header. */
e51c2fb0
AR		 173 qp->npages_send = PVRDMA_QP_NUM_HEADER_PAGES +
174 (qp->sq.wqe_cnt * qp->sq.wqe_size + PAGE_SIZE - 1) /
175 PAGE_SIZE;
29c8d9eb
AR		 176
177 return 0;
178}
179
180/**
181 * pvrdma_create_qp - create queue pair
182 * @pd: protection domain
183 * @init_attr: queue pair attributes
184 * @udata: user data
185 *
186 * @return: the ib_qp pointer on success, otherwise returns an errno.
187 */
188struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
189 struct ib_qp_init_attr *init_attr,
190 struct ib_udata *udata)
191{
192 struct pvrdma_qp *qp = NULL;
193 struct pvrdma_dev *dev = to_vdev(pd->device);
194 union pvrdma_cmd_req req;
195 union pvrdma_cmd_resp rsp;
196 struct pvrdma_cmd_create_qp *cmd = &req.create_qp;
197 struct pvrdma_cmd_create_qp_resp *resp = &rsp.create_qp_resp;
198 struct pvrdma_create_qp ucmd;
199 unsigned long flags;
200 int ret;
8b10ba78 201 bool is_srq = !!init_attr->srq;
29c8d9eb
AR		 202
203 if (init_attr->create_flags) {
204 dev_warn(&dev->pdev->dev,
205 "invalid create queuepair flags %#x\n",
206 init_attr->create_flags);
207 return ERR_PTR(-EINVAL);
208 }
209
210 if (init_attr->qp_type != IB_QPT_RC &&
211 init_attr->qp_type != IB_QPT_UD &&
212 init_attr->qp_type != IB_QPT_GSI) {
213 dev_warn(&dev->pdev->dev, "queuepair type %d not supported\n",
214 init_attr->qp_type);
215 return ERR_PTR(-EINVAL);
216 }
217
8b10ba78
BT		 218 if (is_srq && !dev->dsr->caps.max_srq) {
219 dev_warn(&dev->pdev->dev,
220 "SRQs not supported by device\n");
221 return ERR_PTR(-EINVAL);
222 }
223
29c8d9eb
AR		 224 if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp))
225 return ERR_PTR(-ENOMEM);
226
227 switch (init_attr->qp_type) {
228 case IB_QPT_GSI:
229 if (init_attr->port_num == 0 ||
230 init_attr->port_num > pd->device->phys_port_cnt ||
231 udata) {
232 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n");
233 ret = -EINVAL;
234 goto err_qp;
235 }
236 /* fall through */
237 case IB_QPT_RC:
238 case IB_QPT_UD:
239 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
240 if (!qp) {
241 ret = -ENOMEM;
242 goto err_qp;
243 }
244
245 spin_lock_init(&qp->sq.lock);
246 spin_lock_init(&qp->rq.lock);
247 mutex_init(&qp->mutex);
248 atomic_set(&qp->refcnt, 1);
e3524b26 249 init_completion(&qp->free);
29c8d9eb
AR		 250
251 qp->state = IB_QPS_RESET;
252
253 if (pd->uobject && udata) {
254 dev_dbg(&dev->pdev->dev,
255 "create queuepair from user space\n");
256
257 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
258 ret = -EFAULT;
259 goto err_qp;
260 }
261
8b10ba78
BT		 262 if (!is_srq) {
263 /* set qp->sq.wqe_cnt, shift, buf_size.. */
264 qp->rumem = ib_umem_get(pd->uobject->context,
265 ucmd.rbuf_addr,
266 ucmd.rbuf_size, 0, 0);
267 if (IS_ERR(qp->rumem)) {
268 ret = PTR_ERR(qp->rumem);
269 goto err_qp;
270 }
271 qp->srq = NULL;
272 } else {
273 qp->rumem = NULL;
274 qp->srq = to_vsrq(init_attr->srq);
29c8d9eb
AR		 275 }
276
277 qp->sumem = ib_umem_get(pd->uobject->context,
278 ucmd.sbuf_addr,
279 ucmd.sbuf_size, 0, 0);
280 if (IS_ERR(qp->sumem)) {
8b10ba78
BT		 281 if (!is_srq)
282 ib_umem_release(qp->rumem);
29c8d9eb
AR		 283 ret = PTR_ERR(qp->sumem);
284 goto err_qp;
285 }
286
287 qp->npages_send = ib_umem_page_count(qp->sumem);
8b10ba78
BT		 288 if (!is_srq)
289 qp->npages_recv = ib_umem_page_count(qp->rumem);
290 else
291 qp->npages_recv = 0;
29c8d9eb
AR		 292 qp->npages = qp->npages_send + qp->npages_recv;
293 } else {
294 qp->is_kernel = true;
295
296 ret = pvrdma_set_sq_size(to_vdev(pd->device),
1dd70ea3 297 &init_attr->cap, qp);
29c8d9eb
AR		 298 if (ret)
299 goto err_qp;
300
301 ret = pvrdma_set_rq_size(to_vdev(pd->device),
302 &init_attr->cap, qp);
303 if (ret)
304 goto err_qp;
305
306 qp->npages = qp->npages_send + qp->npages_recv;
307
308 /* Skip header page. */
e51c2fb0 309 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE;
29c8d9eb
AR		 310
311 /* Recv queue pages are after send pages. */
312 qp->rq.offset = qp->npages_send * PAGE_SIZE;
313 }
314
315 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
316 dev_warn(&dev->pdev->dev,
317 "overflow pages in queuepair\n");
318 ret = -EINVAL;
319 goto err_umem;
320 }
321
322 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages,
323 qp->is_kernel);
324 if (ret) {
325 dev_warn(&dev->pdev->dev,
326 "could not allocate page directory\n");
327 goto err_umem;
328 }
329
330 if (!qp->is_kernel) {
331 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0);
8b10ba78
BT		 332 if (!is_srq)
333 pvrdma_page_dir_insert_umem(&qp->pdir,
334 qp->rumem,
335 qp->npages_send);
29c8d9eb
AR		 336 } else {
337 /* Ring state is always the first page. */
338 qp->sq.ring = qp->pdir.pages[0];
8b10ba78 339 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1];
29c8d9eb
AR		 340 }
341 break;
342 default:
343 ret = -EINVAL;
344 goto err_qp;
345 }
346
347 /* Not supported */
348 init_attr->cap.max_inline_data = 0;
349
350 memset(cmd, 0, sizeof(*cmd));
351 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP;
352 cmd->pd_handle = to_vpd(pd)->pd_handle;
353 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle;
354 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle;
8b10ba78
BT		 355 if (is_srq)
356 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle;
357 else
358 cmd->srq_handle = 0;
29c8d9eb
AR		 359 cmd->max_send_wr = init_attr->cap.max_send_wr;
360 cmd->max_recv_wr = init_attr->cap.max_recv_wr;
361 cmd->max_send_sge = init_attr->cap.max_send_sge;
362 cmd->max_recv_sge = init_attr->cap.max_recv_sge;
363 cmd->max_inline_data = init_attr->cap.max_inline_data;
364 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
365 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type);
8b10ba78
BT		 366 cmd->is_srq = is_srq;
367 cmd->lkey = 0;
29c8d9eb
AR		 368 cmd->access_flags = IB_ACCESS_LOCAL_WRITE;
369 cmd->total_chunks = qp->npages;
e51c2fb0 370 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES;
29c8d9eb
AR		 371 cmd->pdir_dma = qp->pdir.dir_dma;
372
373 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n",
374 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge,
375 cmd->max_recv_sge);
376
377 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP);
378 if (ret < 0) {
379 dev_warn(&dev->pdev->dev,
380 "could not create queuepair, error: %d\n", ret);
381 goto err_pdir;
382 }
383
384 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */
385 qp->qp_handle = resp->qpn;
386 qp->port = init_attr->port_num;
387 qp->ibqp.qp_num = resp->qpn;
388 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
389 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp;
390 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
391
392 return &qp->ibqp;
393
394err_pdir:
395 pvrdma_page_dir_cleanup(dev, &qp->pdir);
396err_umem:
397 if (pd->uobject && udata) {
398 if (qp->rumem)
399 ib_umem_release(qp->rumem);
400 if (qp->sumem)
401 ib_umem_release(qp->sumem);
402 }
403err_qp:
404 kfree(qp);
405 atomic_dec(&dev->num_qps);
406
407 return ERR_PTR(ret);
408}
409
410static void pvrdma_free_qp(struct pvrdma_qp *qp)
411{
412 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device);
413 struct pvrdma_cq *scq;
414 struct pvrdma_cq *rcq;
415 unsigned long flags, scq_flags, rcq_flags;
416
417 /* In case cq is polling */
418 get_cqs(qp, &scq, &rcq);
419 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
420
421 _pvrdma_flush_cqe(qp, scq);
422 if (scq != rcq)
423 _pvrdma_flush_cqe(qp, rcq);
424
425 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
426 dev->qp_tbl[qp->qp_handle] = NULL;
427 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
428
429 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
430
e3524b26
BT		 431 if (atomic_dec_and_test(&qp->refcnt))
432 complete(&qp->free);
433 wait_for_completion(&qp->free);
29c8d9eb 434
17748056
BT		 435 if (!qp->is_kernel) {
436 if (qp->rumem)
437 ib_umem_release(qp->rumem);
438 if (qp->sumem)
439 ib_umem_release(qp->sumem);
440 }
441
29c8d9eb
AR		 442 pvrdma_page_dir_cleanup(dev, &qp->pdir);
443
444 kfree(qp);
445
446 atomic_dec(&dev->num_qps);
447}
448
449/**
450 * pvrdma_destroy_qp - destroy a queue pair
451 * @qp: the queue pair to destroy
452 *
453 * @return: 0 on success.
454 */
455int pvrdma_destroy_qp(struct ib_qp *qp)
456{
457 struct pvrdma_qp *vqp = to_vqp(qp);
458 union pvrdma_cmd_req req;
459 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp;
460 int ret;
461
462 memset(cmd, 0, sizeof(*cmd));
463 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP;
464 cmd->qp_handle = vqp->qp_handle;
465
466 ret = pvrdma_cmd_post(to_vdev(qp->device), &req, NULL, 0);
467 if (ret < 0)
468 dev_warn(&to_vdev(qp->device)->pdev->dev,
469 "destroy queuepair failed, error: %d\n", ret);
470
471 pvrdma_free_qp(vqp);
472
473 return 0;
474}
475
476/**
477 * pvrdma_modify_qp - modify queue pair attributes
478 * @ibqp: the queue pair
479 * @attr: the new queue pair's attributes
480 * @attr_mask: attributes mask
481 * @udata: user data
482 *
483 * @returns 0 on success, otherwise returns an errno.
484 */
485int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
486 int attr_mask, struct ib_udata *udata)
487{
488 struct pvrdma_dev *dev = to_vdev(ibqp->device);
489 struct pvrdma_qp *qp = to_vqp(ibqp);
490 union pvrdma_cmd_req req;
491 union pvrdma_cmd_resp rsp;
492 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp;
493 int cur_state, next_state;
494 int ret;
495
496 /* Sanity checking. Should need lock here */
497 mutex_lock(&qp->mutex);
498 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state :
499 qp->state;
500 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state;
501
502 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type,
503 attr_mask, IB_LINK_LAYER_ETHERNET)) {
504 ret = -EINVAL;
505 goto out;
506 }
507
508 if (attr_mask & IB_QP_PORT) {
509 if (attr->port_num == 0 ||
510 attr->port_num > ibqp->device->phys_port_cnt) {
511 ret = -EINVAL;
512 goto out;
513 }
514 }
515
516 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
517 if (attr->min_rnr_timer > 31) {
518 ret = -EINVAL;
519 goto out;
520 }
521 }
522
523 if (attr_mask & IB_QP_PKEY_INDEX) {
524 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) {
525 ret = -EINVAL;
526 goto out;
527 }
528 }
529
530 if (attr_mask & IB_QP_QKEY)
531 qp->qkey = attr->qkey;
532
533 if (cur_state == next_state && cur_state == IB_QPS_RESET) {
534 ret = 0;
535 goto out;
536 }
537
538 qp->state = next_state;
539 memset(cmd, 0, sizeof(*cmd));
540 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP;
541 cmd->qp_handle = qp->qp_handle;
542 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
543 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state);
544 cmd->attrs.cur_qp_state =
545 ib_qp_state_to_pvrdma(attr->cur_qp_state);
546 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu);
547 cmd->attrs.path_mig_state =
548 ib_mig_state_to_pvrdma(attr->path_mig_state);
549 cmd->attrs.qkey = attr->qkey;
550 cmd->attrs.rq_psn = attr->rq_psn;
551 cmd->attrs.sq_psn = attr->sq_psn;
552 cmd->attrs.dest_qp_num = attr->dest_qp_num;
553 cmd->attrs.qp_access_flags =
554 ib_access_flags_to_pvrdma(attr->qp_access_flags);
555 cmd->attrs.pkey_index = attr->pkey_index;
556 cmd->attrs.alt_pkey_index = attr->alt_pkey_index;
557 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify;
558 cmd->attrs.sq_draining = attr->sq_draining;
559 cmd->attrs.max_rd_atomic = attr->max_rd_atomic;
560 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic;
561 cmd->attrs.min_rnr_timer = attr->min_rnr_timer;
562 cmd->attrs.port_num = attr->port_num;
563 cmd->attrs.timeout = attr->timeout;
564 cmd->attrs.retry_cnt = attr->retry_cnt;
565 cmd->attrs.rnr_retry = attr->rnr_retry;
566 cmd->attrs.alt_port_num = attr->alt_port_num;
567 cmd->attrs.alt_timeout = attr->alt_timeout;
568 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap);
f988653a
DC		 569 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr);
570 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr);
29c8d9eb
AR		 571
572 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP);
573 if (ret < 0) {
574 dev_warn(&dev->pdev->dev,
575 "could not modify queuepair, error: %d\n", ret);
576 } else if (rsp.hdr.err > 0) {
577 dev_warn(&dev->pdev->dev,
578 "cannot modify queuepair, error: %d\n", rsp.hdr.err);
579 ret = -EINVAL;
580 }
581
582 if (ret == 0 && next_state == IB_QPS_RESET)
583 pvrdma_reset_qp(qp);
584
585out:
586 mutex_unlock(&qp->mutex);
587
588 return ret;
589}
590
6332dee8 591static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n)
29c8d9eb
AR		 592{
593 return pvrdma_page_dir_get_ptr(&qp->pdir,
594 qp->sq.offset + n * qp->sq.wqe_size);
595}
596
6332dee8 597static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n)
29c8d9eb
AR		 598{
599 return pvrdma_page_dir_get_ptr(&qp->pdir,
600 qp->rq.offset + n * qp->rq.wqe_size);
601}
602
603static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr, struct ib_reg_wr *wr)
604{
605 struct pvrdma_user_mr *mr = to_vmr(wr->mr);
606
607 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova;
608 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma;
609 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift;
610 wqe_hdr->wr.fast_reg.page_list_len = mr->npages;
611 wqe_hdr->wr.fast_reg.length = mr->ibmr.length;
612 wqe_hdr->wr.fast_reg.access_flags = wr->access;
613 wqe_hdr->wr.fast_reg.rkey = wr->key;
614
615 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages,
616 mr->npages);
617}
618
619/**
620 * pvrdma_post_send - post send work request entries on a QP
621 * @ibqp: the QP
622 * @wr: work request list to post
623 * @bad_wr: the first bad WR returned
624 *
625 * @return: 0 on success, otherwise errno returned.
626 */
627int pvrdma_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
628 struct ib_send_wr **bad_wr)
629{
630 struct pvrdma_qp *qp = to_vqp(ibqp);
631 struct pvrdma_dev *dev = to_vdev(ibqp->device);
632 unsigned long flags;
633 struct pvrdma_sq_wqe_hdr *wqe_hdr;
634 struct pvrdma_sge *sge;
6332dee8 635 int i, ret;
29c8d9eb
AR		 636
637 /*
638 * In states lower than RTS, we can fail immediately. In other states,
639 * just post and let the device figure it out.
640 */
641 if (qp->state < IB_QPS_RTS) {
642 *bad_wr = wr;
643 return -EINVAL;
644 }
645
646 spin_lock_irqsave(&qp->sq.lock, flags);
647
6332dee8
AR		 648 while (wr) {
649 unsigned int tail = 0;
29c8d9eb
AR		 650
651 if (unlikely(!pvrdma_idx_ring_has_space(
652 qp->sq.ring, qp->sq.wqe_cnt, &tail))) {
653 dev_warn_ratelimited(&dev->pdev->dev,
654 "send queue is full\n");
655 *bad_wr = wr;
656 ret = -ENOMEM;
657 goto out;
658 }
659
660 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) {
661 dev_warn_ratelimited(&dev->pdev->dev,
662 "send SGE overflow\n");
663 *bad_wr = wr;
664 ret = -EINVAL;
665 goto out;
666 }
667
668 if (unlikely(wr->opcode < 0)) {
669 dev_warn_ratelimited(&dev->pdev->dev,
670 "invalid send opcode\n");
671 *bad_wr = wr;
672 ret = -EINVAL;
673 goto out;
674 }
675
676 /*
677 * Only support UD, RC.
678 * Need to check opcode table for thorough checking.
679 * opcode _UD _UC _RC
680 * _SEND x x x
681 * _SEND_WITH_IMM x x x
682 * _RDMA_WRITE x x
683 * _RDMA_WRITE_WITH_IMM x x
684 * _LOCAL_INV x x
685 * _SEND_WITH_INV x x
686 * _RDMA_READ x
687 * _ATOMIC_CMP_AND_SWP x
688 * _ATOMIC_FETCH_AND_ADD x
689 * _MASK_ATOMIC_CMP_AND_SWP x
690 * _MASK_ATOMIC_FETCH_AND_ADD x
691 * _REG_MR x
692 *
693 */
694 if (qp->ibqp.qp_type != IB_QPT_UD &&
695 qp->ibqp.qp_type != IB_QPT_RC &&
696 wr->opcode != IB_WR_SEND) {
697 dev_warn_ratelimited(&dev->pdev->dev,
698 "unsupported queuepair type\n");
699 *bad_wr = wr;
700 ret = -EINVAL;
701 goto out;
702 } else if (qp->ibqp.qp_type == IB_QPT_UD ||
703 qp->ibqp.qp_type == IB_QPT_GSI) {
704 if (wr->opcode != IB_WR_SEND &&
705 wr->opcode != IB_WR_SEND_WITH_IMM) {
706 dev_warn_ratelimited(&dev->pdev->dev,
707 "invalid send opcode\n");
708 *bad_wr = wr;
709 ret = -EINVAL;
710 goto out;
711 }
712 }
713
6332dee8 714 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail);
29c8d9eb
AR		 715 memset(wqe_hdr, 0, sizeof(*wqe_hdr));
716 wqe_hdr->wr_id = wr->wr_id;
717 wqe_hdr->num_sge = wr->num_sge;
718 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode);
719 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags);
720 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
721 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
722 wqe_hdr->ex.imm_data = wr->ex.imm_data;
723
724 switch (qp->ibqp.qp_type) {
725 case IB_QPT_GSI:
726 case IB_QPT_UD:
727 if (unlikely(!ud_wr(wr)->ah)) {
728 dev_warn_ratelimited(&dev->pdev->dev,
729 "invalid address handle\n");
730 *bad_wr = wr;
731 ret = -EINVAL;
732 goto out;
733 }
734
735 /*
736 * Use qkey from qp context if high order bit set,
737 * otherwise from work request.
738 */
739 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn;
740 wqe_hdr->wr.ud.remote_qkey =
741 ud_wr(wr)->remote_qkey & 0x80000000 ?
742 qp->qkey : ud_wr(wr)->remote_qkey;
743 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av;
744
745 break;
746 case IB_QPT_RC:
747 switch (wr->opcode) {
748 case IB_WR_RDMA_READ:
749 case IB_WR_RDMA_WRITE:
750 case IB_WR_RDMA_WRITE_WITH_IMM:
751 wqe_hdr->wr.rdma.remote_addr =
752 rdma_wr(wr)->remote_addr;
753 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey;
754 break;
755 case IB_WR_LOCAL_INV:
756 case IB_WR_SEND_WITH_INV:
757 wqe_hdr->ex.invalidate_rkey =
758 wr->ex.invalidate_rkey;
759 break;
760 case IB_WR_ATOMIC_CMP_AND_SWP:
761 case IB_WR_ATOMIC_FETCH_AND_ADD:
762 wqe_hdr->wr.atomic.remote_addr =
763 atomic_wr(wr)->remote_addr;
764 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey;
765 wqe_hdr->wr.atomic.compare_add =
766 atomic_wr(wr)->compare_add;
767 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP)
768 wqe_hdr->wr.atomic.swap =
769 atomic_wr(wr)->swap;
770 break;
771 case IB_WR_REG_MR:
772 ret = set_reg_seg(wqe_hdr, reg_wr(wr));
773 if (ret < 0) {
774 dev_warn_ratelimited(&dev->pdev->dev,
775 "Failed to set fast register work request\n");
776 *bad_wr = wr;
777 goto out;
778 }
779 break;
780 default:
781 break;
782 }
783
784 break;
785 default:
786 dev_warn_ratelimited(&dev->pdev->dev,
787 "invalid queuepair type\n");
788 ret = -EINVAL;
789 *bad_wr = wr;
790 goto out;
791 }
792
793 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
794 for (i = 0; i < wr->num_sge; i++) {
795 /* Need to check wqe_size 0 or max size */
796 sge->addr = wr->sg_list[i].addr;
797 sge->length = wr->sg_list[i].length;
798 sge->lkey = wr->sg_list[i].lkey;
799 sge++;
800 }
801
802 /* Make sure wqe is written before index update */
803 smp_wmb();
804
29c8d9eb
AR		 805 /* Update shared sq ring */
806 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail,
807 qp->sq.wqe_cnt);
6332dee8
AR		 808
809 wr = wr->next;
29c8d9eb
AR		 810 }
811
812 ret = 0;
813
814out:
815 spin_unlock_irqrestore(&qp->sq.lock, flags);
816
817 if (!ret)
818 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle);
819
820 return ret;
821}
822
823/**
824 * pvrdma_post_receive - post receive work request entries on a QP
825 * @ibqp: the QP
826 * @wr: the work request list to post
827 * @bad_wr: the first bad WR returned
828 *
829 * @return: 0 on success, otherwise errno returned.
830 */
831int pvrdma_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
832 struct ib_recv_wr **bad_wr)
833{
834 struct pvrdma_dev *dev = to_vdev(ibqp->device);
835 unsigned long flags;
836 struct pvrdma_qp *qp = to_vqp(ibqp);
837 struct pvrdma_rq_wqe_hdr *wqe_hdr;
838 struct pvrdma_sge *sge;
29c8d9eb
AR		 839 int ret = 0;
840 int i;
841
842 /*
843 * In the RESET state, we can fail immediately. For other states,
844 * just post and let the device figure it out.
845 */
846 if (qp->state == IB_QPS_RESET) {
847 *bad_wr = wr;
848 return -EINVAL;
849 }
850
8b10ba78
BT		 851 if (qp->srq) {
852 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n");
853 *bad_wr = wr;
854 return -EINVAL;
855 }
856
29c8d9eb
AR		 857 spin_lock_irqsave(&qp->rq.lock, flags);
858
6332dee8
AR		 859 while (wr) {
860 unsigned int tail = 0;
29c8d9eb
AR		 861
862 if (unlikely(wr->num_sge > qp->rq.max_sg ||
863 wr->num_sge < 0)) {
864 ret = -EINVAL;
865 *bad_wr = wr;
866 dev_warn_ratelimited(&dev->pdev->dev,
867 "recv SGE overflow\n");
868 goto out;
869 }
870
871 if (unlikely(!pvrdma_idx_ring_has_space(
872 qp->rq.ring, qp->rq.wqe_cnt, &tail))) {
873 ret = -ENOMEM;
874 *bad_wr = wr;
875 dev_warn_ratelimited(&dev->pdev->dev,
876 "recv queue full\n");
877 goto out;
878 }
879
6332dee8 880 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail);
29c8d9eb
AR		 881 wqe_hdr->wr_id = wr->wr_id;
882 wqe_hdr->num_sge = wr->num_sge;
883 wqe_hdr->total_len = 0;
884
885 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
886 for (i = 0; i < wr->num_sge; i++) {
887 sge->addr = wr->sg_list[i].addr;
888 sge->length = wr->sg_list[i].length;
889 sge->lkey = wr->sg_list[i].lkey;
890 sge++;
891 }
892
893 /* Make sure wqe is written before index update */
894 smp_wmb();
895
29c8d9eb
AR		 896 /* Update shared rq ring */
897 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail,
898 qp->rq.wqe_cnt);
6332dee8
AR		 899
900 wr = wr->next;
29c8d9eb
AR		 901 }
902
903 spin_unlock_irqrestore(&qp->rq.lock, flags);
904
905 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle);
906
907 return ret;
908
909out:
910 spin_unlock_irqrestore(&qp->rq.lock, flags);
911
912 return ret;
913}
914
915/**
916 * pvrdma_query_qp - query a queue pair's attributes
917 * @ibqp: the queue pair to query
918 * @attr: the queue pair's attributes
919 * @attr_mask: attributes mask
920 * @init_attr: initial queue pair attributes
921 *
922 * @returns 0 on success, otherwise returns an errno.
923 */
924int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
925 int attr_mask, struct ib_qp_init_attr *init_attr)
926{
927 struct pvrdma_dev *dev = to_vdev(ibqp->device);
928 struct pvrdma_qp *qp = to_vqp(ibqp);
929 union pvrdma_cmd_req req;
930 union pvrdma_cmd_resp rsp;
931 struct pvrdma_cmd_query_qp *cmd = &req.query_qp;
932 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp;
933 int ret = 0;
934
935 mutex_lock(&qp->mutex);
936
937 if (qp->state == IB_QPS_RESET) {
938 attr->qp_state = IB_QPS_RESET;
939 goto out;
940 }
941
942 memset(cmd, 0, sizeof(*cmd));
943 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP;
944 cmd->qp_handle = qp->qp_handle;
945 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
946
947 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP);
948 if (ret < 0) {
949 dev_warn(&dev->pdev->dev,
950 "could not query queuepair, error: %d\n", ret);
951 goto out;
952 }
953
954 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state);
955 attr->cur_qp_state =
956 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state);
957 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu);
958 attr->path_mig_state =
959 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state);
960 attr->qkey = resp->attrs.qkey;
961 attr->rq_psn = resp->attrs.rq_psn;
962 attr->sq_psn = resp->attrs.sq_psn;
963 attr->dest_qp_num = resp->attrs.dest_qp_num;
964 attr->qp_access_flags =
965 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags);
966 attr->pkey_index = resp->attrs.pkey_index;
967 attr->alt_pkey_index = resp->attrs.alt_pkey_index;
968 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify;
969 attr->sq_draining = resp->attrs.sq_draining;
970 attr->max_rd_atomic = resp->attrs.max_rd_atomic;
971 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic;
972 attr->min_rnr_timer = resp->attrs.min_rnr_timer;
973 attr->port_num = resp->attrs.port_num;
974 attr->timeout = resp->attrs.timeout;
975 attr->retry_cnt = resp->attrs.retry_cnt;
976 attr->rnr_retry = resp->attrs.rnr_retry;
977 attr->alt_port_num = resp->attrs.alt_port_num;
978 attr->alt_timeout = resp->attrs.alt_timeout;
979 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap);
f988653a
DC		 980 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr);
981 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr);
29c8d9eb
AR		 982
983 qp->state = attr->qp_state;
984
985 ret = 0;
986
987out:
988 attr->cur_qp_state = attr->qp_state;
989
990 init_attr->event_handler = qp->ibqp.event_handler;
991 init_attr->qp_context = qp->ibqp.qp_context;
992 init_attr->send_cq = qp->ibqp.send_cq;
993 init_attr->recv_cq = qp->ibqp.recv_cq;
994 init_attr->srq = qp->ibqp.srq;
995 init_attr->xrcd = NULL;
996 init_attr->cap = attr->cap;
997 init_attr->sq_sig_type = 0;
998 init_attr->qp_type = qp->ibqp.qp_type;
999 init_attr->create_flags = 0;
1000 init_attr->port_num = qp->port;
1001
1002 mutex_unlock(&qp->mutex);
1003 return ret;
1004}
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