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interconnect: qcom: Fix Kconfig indentation
[linux/fpc-iii.git] / drivers / infiniband / hw / vmw_pvrdma / pvrdma_qp.c
blobf15809c28f67342048550a730a4d86e85ec44bc7
1 /*
2 * Copyright (c) 2012-2016 VMware, Inc. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of EITHER the GNU General Public License
6 * version 2 as published by the Free Software Foundation or the BSD
7 * 2-Clause License. This program is distributed in the hope that it
8 * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED
9 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
10 * See the GNU General Public License version 2 for more details at
11 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program available in the file COPYING in the main
15 * directory of this source tree.
16 *
17 * The BSD 2-Clause License
18 *
19 * Redistribution and use in source and binary forms, with or
20 * without modification, are permitted provided that the following
21 * conditions are met:
22 *
23 * - Redistributions of source code must retain the above
24 * copyright notice, this list of conditions and the following
25 * disclaimer.
26 *
27 * - Redistributions in binary form must reproduce the above
28 * copyright notice, this list of conditions and the following
29 * disclaimer in the documentation and/or other materials
30 * provided with the distribution.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
35 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
36 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43 * OF THE POSSIBILITY OF SUCH DAMAGE.
44 */
45
46 #include <asm/page.h>
47 #include <linux/io.h>
48 #include <linux/wait.h>
49 #include <rdma/ib_addr.h>
50 #include <rdma/ib_smi.h>
51 #include <rdma/ib_user_verbs.h>
52
53 #include "pvrdma.h"
54
55 static void __pvrdma_destroy_qp(struct pvrdma_dev *dev,
56 struct pvrdma_qp *qp);
57
58 static inline void get_cqs(struct pvrdma_qp *qp, struct pvrdma_cq **send_cq,
59 struct pvrdma_cq **recv_cq)
60 {
61 *send_cq = to_vcq(qp->ibqp.send_cq);
62 *recv_cq = to_vcq(qp->ibqp.recv_cq);
63 }
64
65 static void pvrdma_lock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq,
66 unsigned long *scq_flags,
67 unsigned long *rcq_flags)
68 __acquires(scq->cq_lock) __acquires(rcq->cq_lock)
69 {
70 if (scq == rcq) {
71 spin_lock_irqsave(&scq->cq_lock, *scq_flags);
72 __acquire(rcq->cq_lock);
73 } else if (scq->cq_handle < rcq->cq_handle) {
74 spin_lock_irqsave(&scq->cq_lock, *scq_flags);
75 spin_lock_irqsave_nested(&rcq->cq_lock, *rcq_flags,
76 SINGLE_DEPTH_NESTING);
77 } else {
78 spin_lock_irqsave(&rcq->cq_lock, *rcq_flags);
79 spin_lock_irqsave_nested(&scq->cq_lock, *scq_flags,
80 SINGLE_DEPTH_NESTING);
81 }
82 }
83
84 static void pvrdma_unlock_cqs(struct pvrdma_cq *scq, struct pvrdma_cq *rcq,
85 unsigned long *scq_flags,
86 unsigned long *rcq_flags)
87 __releases(scq->cq_lock) __releases(rcq->cq_lock)
88 {
89 if (scq == rcq) {
90 __release(rcq->cq_lock);
91 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
92 } else if (scq->cq_handle < rcq->cq_handle) {
93 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
94 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
95 } else {
96 spin_unlock_irqrestore(&scq->cq_lock, *scq_flags);
97 spin_unlock_irqrestore(&rcq->cq_lock, *rcq_flags);
98 }
99 }
100
101 static void pvrdma_reset_qp(struct pvrdma_qp *qp)
102 {
103 struct pvrdma_cq *scq, *rcq;
104 unsigned long scq_flags, rcq_flags;
105
106 /* Clean up cqes */
107 get_cqs(qp, &scq, &rcq);
108 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
109
110 _pvrdma_flush_cqe(qp, scq);
111 if (scq != rcq)
112 _pvrdma_flush_cqe(qp, rcq);
113
114 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
115
116 /*
117 * Reset queuepair. The checks are because usermode queuepairs won't
118 * have kernel ringstates.
119 */
120 if (qp->rq.ring) {
121 atomic_set(&qp->rq.ring->cons_head, 0);
122 atomic_set(&qp->rq.ring->prod_tail, 0);
123 }
124 if (qp->sq.ring) {
125 atomic_set(&qp->sq.ring->cons_head, 0);
126 atomic_set(&qp->sq.ring->prod_tail, 0);
127 }
128 }
129
130 static int pvrdma_set_rq_size(struct pvrdma_dev *dev,
131 struct ib_qp_cap *req_cap,
132 struct pvrdma_qp *qp)
133 {
134 if (req_cap->max_recv_wr > dev->dsr->caps.max_qp_wr ||
135 req_cap->max_recv_sge > dev->dsr->caps.max_sge) {
136 dev_warn(&dev->pdev->dev, "recv queue size invalid\n");
137 return -EINVAL;
138 }
139
140 qp->rq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_recv_wr));
141 qp->rq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_recv_sge));
142
143 /* Write back */
144 req_cap->max_recv_wr = qp->rq.wqe_cnt;
145 req_cap->max_recv_sge = qp->rq.max_sg;
146
147 qp->rq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_rq_wqe_hdr) +
148 sizeof(struct pvrdma_sge) *
149 qp->rq.max_sg);
150 qp->npages_recv = (qp->rq.wqe_cnt * qp->rq.wqe_size + PAGE_SIZE - 1) /
151 PAGE_SIZE;
152
153 return 0;
154 }
155
156 static int pvrdma_set_sq_size(struct pvrdma_dev *dev, struct ib_qp_cap *req_cap,
157 struct pvrdma_qp *qp)
158 {
159 if (req_cap->max_send_wr > dev->dsr->caps.max_qp_wr ||
160 req_cap->max_send_sge > dev->dsr->caps.max_sge) {
161 dev_warn(&dev->pdev->dev, "send queue size invalid\n");
162 return -EINVAL;
163 }
164
165 qp->sq.wqe_cnt = roundup_pow_of_two(max(1U, req_cap->max_send_wr));
166 qp->sq.max_sg = roundup_pow_of_two(max(1U, req_cap->max_send_sge));
167
168 /* Write back */
169 req_cap->max_send_wr = qp->sq.wqe_cnt;
170 req_cap->max_send_sge = qp->sq.max_sg;
171
172 qp->sq.wqe_size = roundup_pow_of_two(sizeof(struct pvrdma_sq_wqe_hdr) +
173 sizeof(struct pvrdma_sge) *
174 qp->sq.max_sg);
175 /* Note: one extra page for the header. */
176 qp->npages_send = PVRDMA_QP_NUM_HEADER_PAGES +
177 (qp->sq.wqe_cnt * qp->sq.wqe_size + PAGE_SIZE - 1) /
178 PAGE_SIZE;
179
180 return 0;
181 }
182
183 /**
184 * pvrdma_create_qp - create queue pair
185 * @pd: protection domain
186 * @init_attr: queue pair attributes
187 * @udata: user data
188 *
189 * @return: the ib_qp pointer on success, otherwise returns an errno.
190 */
191 struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
192 struct ib_qp_init_attr *init_attr,
193 struct ib_udata *udata)
194 {
195 struct pvrdma_qp *qp = NULL;
196 struct pvrdma_dev *dev = to_vdev(pd->device);
197 union pvrdma_cmd_req req;
198 union pvrdma_cmd_resp rsp;
199 struct pvrdma_cmd_create_qp *cmd = &req.create_qp;
200 struct pvrdma_cmd_create_qp_resp *resp = &rsp.create_qp_resp;
201 struct pvrdma_cmd_create_qp_resp_v2 *resp_v2 = &rsp.create_qp_resp_v2;
202 struct pvrdma_create_qp ucmd;
203 struct pvrdma_create_qp_resp qp_resp = {};
204 unsigned long flags;
205 int ret;
206 bool is_srq = !!init_attr->srq;
207
208 if (init_attr->create_flags) {
209 dev_warn(&dev->pdev->dev,
210 "invalid create queuepair flags %#x\n",
211 init_attr->create_flags);
212 return ERR_PTR(-EINVAL);
213 }
214
215 if (init_attr->qp_type != IB_QPT_RC &&
216 init_attr->qp_type != IB_QPT_UD &&
217 init_attr->qp_type != IB_QPT_GSI) {
218 dev_warn(&dev->pdev->dev, "queuepair type %d not supported\n",
219 init_attr->qp_type);
220 return ERR_PTR(-EINVAL);
221 }
222
223 if (is_srq && !dev->dsr->caps.max_srq) {
224 dev_warn(&dev->pdev->dev,
225 "SRQs not supported by device\n");
226 return ERR_PTR(-EINVAL);
227 }
228
229 if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp))
230 return ERR_PTR(-ENOMEM);
231
232 switch (init_attr->qp_type) {
233 case IB_QPT_GSI:
234 if (init_attr->port_num == 0 ||
235 init_attr->port_num > pd->device->phys_port_cnt ||
236 udata) {
237 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n");
238 ret = -EINVAL;
239 goto err_qp;
240 }
241 /* fall through */
242 case IB_QPT_RC:
243 case IB_QPT_UD:
244 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
245 if (!qp) {
246 ret = -ENOMEM;
247 goto err_qp;
248 }
249
250 spin_lock_init(&qp->sq.lock);
251 spin_lock_init(&qp->rq.lock);
252 mutex_init(&qp->mutex);
253 refcount_set(&qp->refcnt, 1);
254 init_completion(&qp->free);
255
256 qp->state = IB_QPS_RESET;
257 qp->is_kernel = !udata;
258
259 if (!qp->is_kernel) {
260 dev_dbg(&dev->pdev->dev,
261 "create queuepair from user space\n");
262
263 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
264 ret = -EFAULT;
265 goto err_qp;
266 }
267
268 /* Userspace supports qpn and qp handles? */
269 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION &&
270 udata->outlen < sizeof(qp_resp)) {
271 dev_warn(&dev->pdev->dev,
272 "create queuepair not supported\n");
273 ret = -EOPNOTSUPP;
274 goto err_qp;
275 }
276
277 if (!is_srq) {
278 /* set qp->sq.wqe_cnt, shift, buf_size.. */
279 qp->rumem = ib_umem_get(udata, 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(udata, 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 = ib_umem_page_count(qp->sumem);
301 if (!is_srq)
302 qp->npages_recv = ib_umem_page_count(qp->rumem);
303 else
304 qp->npages_recv = 0;
305 qp->npages = qp->npages_send + qp->npages_recv;
306 } else {
307 ret = pvrdma_set_sq_size(to_vdev(pd->device),
308 &init_attr->cap, qp);
309 if (ret)
310 goto err_qp;
311
312 ret = pvrdma_set_rq_size(to_vdev(pd->device),
313 &init_attr->cap, qp);
314 if (ret)
315 goto err_qp;
316
317 qp->npages = qp->npages_send + qp->npages_recv;
318
319 /* Skip header page. */
320 qp->sq.offset = PVRDMA_QP_NUM_HEADER_PAGES * PAGE_SIZE;
321
322 /* Recv queue pages are after send pages. */
323 qp->rq.offset = qp->npages_send * PAGE_SIZE;
324 }
325
326 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
327 dev_warn(&dev->pdev->dev,
328 "overflow pages in queuepair\n");
329 ret = -EINVAL;
330 goto err_umem;
331 }
332
333 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages,
334 qp->is_kernel);
335 if (ret) {
336 dev_warn(&dev->pdev->dev,
337 "could not allocate page directory\n");
338 goto err_umem;
339 }
340
341 if (!qp->is_kernel) {
342 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0);
343 if (!is_srq)
344 pvrdma_page_dir_insert_umem(&qp->pdir,
345 qp->rumem,
346 qp->npages_send);
347 } else {
348 /* Ring state is always the first page. */
349 qp->sq.ring = qp->pdir.pages[0];
350 qp->rq.ring = is_srq ? NULL : &qp->sq.ring[1];
351 }
352 break;
353 default:
354 ret = -EINVAL;
355 goto err_qp;
356 }
357
358 /* Not supported */
359 init_attr->cap.max_inline_data = 0;
360
361 memset(cmd, 0, sizeof(*cmd));
362 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP;
363 cmd->pd_handle = to_vpd(pd)->pd_handle;
364 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle;
365 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle;
366 if (is_srq)
367 cmd->srq_handle = to_vsrq(init_attr->srq)->srq_handle;
368 else
369 cmd->srq_handle = 0;
370 cmd->max_send_wr = init_attr->cap.max_send_wr;
371 cmd->max_recv_wr = init_attr->cap.max_recv_wr;
372 cmd->max_send_sge = init_attr->cap.max_send_sge;
373 cmd->max_recv_sge = init_attr->cap.max_recv_sge;
374 cmd->max_inline_data = init_attr->cap.max_inline_data;
375 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
376 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type);
377 cmd->is_srq = is_srq;
378 cmd->lkey = 0;
379 cmd->access_flags = IB_ACCESS_LOCAL_WRITE;
380 cmd->total_chunks = qp->npages;
381 cmd->send_chunks = qp->npages_send - PVRDMA_QP_NUM_HEADER_PAGES;
382 cmd->pdir_dma = qp->pdir.dir_dma;
383
384 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n",
385 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge,
386 cmd->max_recv_sge);
387
388 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP);
389 if (ret < 0) {
390 dev_warn(&dev->pdev->dev,
391 "could not create queuepair, error: %d\n", ret);
392 goto err_pdir;
393 }
394
395 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */
396 qp->port = init_attr->port_num;
397
398 if (dev->dsr_version >= PVRDMA_QPHANDLE_VERSION) {
399 qp->ibqp.qp_num = resp_v2->qpn;
400 qp->qp_handle = resp_v2->qp_handle;
401 } else {
402 qp->ibqp.qp_num = resp->qpn;
403 qp->qp_handle = resp->qpn;
404 }
405
406 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
407 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp;
408 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
409
410 if (udata) {
411 qp_resp.qpn = qp->ibqp.qp_num;
412 qp_resp.qp_handle = qp->qp_handle;
413
414 if (ib_copy_to_udata(udata, &qp_resp,
415 min(udata->outlen, sizeof(qp_resp)))) {
416 dev_warn(&dev->pdev->dev,
417 "failed to copy back udata\n");
418 __pvrdma_destroy_qp(dev, qp);
419 return ERR_PTR(-EINVAL);
420 }
421 }
422
423 return &qp->ibqp;
424
425 err_pdir:
426 pvrdma_page_dir_cleanup(dev, &qp->pdir);
427 err_umem:
428 ib_umem_release(qp->rumem);
429 ib_umem_release(qp->sumem);
430 err_qp:
431 kfree(qp);
432 atomic_dec(&dev->num_qps);
433
434 return ERR_PTR(ret);
435 }
436
437 static void _pvrdma_free_qp(struct pvrdma_qp *qp)
438 {
439 unsigned long flags;
440 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device);
441
442 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
443 dev->qp_tbl[qp->qp_handle] = NULL;
444 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
445
446 if (refcount_dec_and_test(&qp->refcnt))
447 complete(&qp->free);
448 wait_for_completion(&qp->free);
449
450 ib_umem_release(qp->rumem);
451 ib_umem_release(qp->sumem);
452
453 pvrdma_page_dir_cleanup(dev, &qp->pdir);
454
455 kfree(qp);
456
457 atomic_dec(&dev->num_qps);
458 }
459
460 static void pvrdma_free_qp(struct pvrdma_qp *qp)
461 {
462 struct pvrdma_cq *scq;
463 struct pvrdma_cq *rcq;
464 unsigned long scq_flags, rcq_flags;
465
466 /* In case cq is polling */
467 get_cqs(qp, &scq, &rcq);
468 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
469
470 _pvrdma_flush_cqe(qp, scq);
471 if (scq != rcq)
472 _pvrdma_flush_cqe(qp, rcq);
473
474 /*
475 * We're now unlocking the CQs before clearing out the qp handle this
476 * should still be safe. We have destroyed the backend QP and flushed
477 * the CQEs so there should be no other completions for this QP.
478 */
479 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
480
481 _pvrdma_free_qp(qp);
482 }
483
484 static inline void _pvrdma_destroy_qp_work(struct pvrdma_dev *dev,
485 u32 qp_handle)
486 {
487 union pvrdma_cmd_req req;
488 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp;
489 int ret;
490
491 memset(cmd, 0, sizeof(*cmd));
492 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP;
493 cmd->qp_handle = qp_handle;
494
495 ret = pvrdma_cmd_post(dev, &req, NULL, 0);
496 if (ret < 0)
497 dev_warn(&dev->pdev->dev,
498 "destroy queuepair failed, error: %d\n", ret);
499 }
500
501 /**
502 * pvrdma_destroy_qp - destroy a queue pair
503 * @qp: the queue pair to destroy
504 * @udata: user data or null for kernel object
505 *
506 * @return: always 0.
507 */
508 int pvrdma_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
509 {
510 struct pvrdma_qp *vqp = to_vqp(qp);
511
512 _pvrdma_destroy_qp_work(to_vdev(qp->device), vqp->qp_handle);
513 pvrdma_free_qp(vqp);
514
515 return 0;
516 }
517
518 static void __pvrdma_destroy_qp(struct pvrdma_dev *dev,
519 struct pvrdma_qp *qp)
520 {
521 _pvrdma_destroy_qp_work(dev, qp->qp_handle);
522 _pvrdma_free_qp(qp);
523 }
524
525 /**
526 * pvrdma_modify_qp - modify queue pair attributes
527 * @ibqp: the queue pair
528 * @attr: the new queue pair's attributes
529 * @attr_mask: attributes mask
530 * @udata: user data
531 *
532 * @returns 0 on success, otherwise returns an errno.
533 */
534 int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
535 int attr_mask, struct ib_udata *udata)
536 {
537 struct pvrdma_dev *dev = to_vdev(ibqp->device);
538 struct pvrdma_qp *qp = to_vqp(ibqp);
539 union pvrdma_cmd_req req;
540 union pvrdma_cmd_resp rsp;
541 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp;
542 enum ib_qp_state cur_state, next_state;
543 int ret;
544
545 /* Sanity checking. Should need lock here */
546 mutex_lock(&qp->mutex);
547 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state :
548 qp->state;
549 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state;
550
551 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type,
552 attr_mask)) {
553 ret = -EINVAL;
554 goto out;
555 }
556
557 if (attr_mask & IB_QP_PORT) {
558 if (attr->port_num == 0 ||
559 attr->port_num > ibqp->device->phys_port_cnt) {
560 ret = -EINVAL;
561 goto out;
562 }
563 }
564
565 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
566 if (attr->min_rnr_timer > 31) {
567 ret = -EINVAL;
568 goto out;
569 }
570 }
571
572 if (attr_mask & IB_QP_PKEY_INDEX) {
573 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) {
574 ret = -EINVAL;
575 goto out;
576 }
577 }
578
579 if (attr_mask & IB_QP_QKEY)
580 qp->qkey = attr->qkey;
581
582 if (cur_state == next_state && cur_state == IB_QPS_RESET) {
583 ret = 0;
584 goto out;
585 }
586
587 qp->state = next_state;
588 memset(cmd, 0, sizeof(*cmd));
589 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP;
590 cmd->qp_handle = qp->qp_handle;
591 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
592 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state);
593 cmd->attrs.cur_qp_state =
594 ib_qp_state_to_pvrdma(attr->cur_qp_state);
595 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu);
596 cmd->attrs.path_mig_state =
597 ib_mig_state_to_pvrdma(attr->path_mig_state);
598 cmd->attrs.qkey = attr->qkey;
599 cmd->attrs.rq_psn = attr->rq_psn;
600 cmd->attrs.sq_psn = attr->sq_psn;
601 cmd->attrs.dest_qp_num = attr->dest_qp_num;
602 cmd->attrs.qp_access_flags =
603 ib_access_flags_to_pvrdma(attr->qp_access_flags);
604 cmd->attrs.pkey_index = attr->pkey_index;
605 cmd->attrs.alt_pkey_index = attr->alt_pkey_index;
606 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify;
607 cmd->attrs.sq_draining = attr->sq_draining;
608 cmd->attrs.max_rd_atomic = attr->max_rd_atomic;
609 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic;
610 cmd->attrs.min_rnr_timer = attr->min_rnr_timer;
611 cmd->attrs.port_num = attr->port_num;
612 cmd->attrs.timeout = attr->timeout;
613 cmd->attrs.retry_cnt = attr->retry_cnt;
614 cmd->attrs.rnr_retry = attr->rnr_retry;
615 cmd->attrs.alt_port_num = attr->alt_port_num;
616 cmd->attrs.alt_timeout = attr->alt_timeout;
617 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap);
618 rdma_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr);
619 rdma_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr);
620
621 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP);
622 if (ret < 0) {
623 dev_warn(&dev->pdev->dev,
624 "could not modify queuepair, error: %d\n", ret);
625 } else if (rsp.hdr.err > 0) {
626 dev_warn(&dev->pdev->dev,
627 "cannot modify queuepair, error: %d\n", rsp.hdr.err);
628 ret = -EINVAL;
629 }
630
631 if (ret == 0 && next_state == IB_QPS_RESET)
632 pvrdma_reset_qp(qp);
633
634 out:
635 mutex_unlock(&qp->mutex);
636
637 return ret;
638 }
639
640 static inline void *get_sq_wqe(struct pvrdma_qp *qp, unsigned int n)
641 {
642 return pvrdma_page_dir_get_ptr(&qp->pdir,
643 qp->sq.offset + n * qp->sq.wqe_size);
644 }
645
646 static inline void *get_rq_wqe(struct pvrdma_qp *qp, unsigned int n)
647 {
648 return pvrdma_page_dir_get_ptr(&qp->pdir,
649 qp->rq.offset + n * qp->rq.wqe_size);
650 }
651
652 static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr,
653 const struct ib_reg_wr *wr)
654 {
655 struct pvrdma_user_mr *mr = to_vmr(wr->mr);
656
657 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova;
658 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma;
659 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift;
660 wqe_hdr->wr.fast_reg.page_list_len = mr->npages;
661 wqe_hdr->wr.fast_reg.length = mr->ibmr.length;
662 wqe_hdr->wr.fast_reg.access_flags = wr->access;
663 wqe_hdr->wr.fast_reg.rkey = wr->key;
664
665 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages,
666 mr->npages);
667 }
668
669 /**
670 * pvrdma_post_send - post send work request entries on a QP
671 * @ibqp: the QP
672 * @wr: work request list to post
673 * @bad_wr: the first bad WR returned
674 *
675 * @return: 0 on success, otherwise errno returned.
676 */
677 int pvrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
678 const struct ib_send_wr **bad_wr)
679 {
680 struct pvrdma_qp *qp = to_vqp(ibqp);
681 struct pvrdma_dev *dev = to_vdev(ibqp->device);
682 unsigned long flags;
683 struct pvrdma_sq_wqe_hdr *wqe_hdr;
684 struct pvrdma_sge *sge;
685 int i, ret;
686
687 /*
688 * In states lower than RTS, we can fail immediately. In other states,
689 * just post and let the device figure it out.
690 */
691 if (qp->state < IB_QPS_RTS) {
692 *bad_wr = wr;
693 return -EINVAL;
694 }
695
696 spin_lock_irqsave(&qp->sq.lock, flags);
697
698 while (wr) {
699 unsigned int tail = 0;
700
701 if (unlikely(!pvrdma_idx_ring_has_space(
702 qp->sq.ring, qp->sq.wqe_cnt, &tail))) {
703 dev_warn_ratelimited(&dev->pdev->dev,
704 "send queue is full\n");
705 *bad_wr = wr;
706 ret = -ENOMEM;
707 goto out;
708 }
709
710 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) {
711 dev_warn_ratelimited(&dev->pdev->dev,
712 "send SGE overflow\n");
713 *bad_wr = wr;
714 ret = -EINVAL;
715 goto out;
716 }
717
718 if (unlikely(wr->opcode < 0)) {
719 dev_warn_ratelimited(&dev->pdev->dev,
720 "invalid send opcode\n");
721 *bad_wr = wr;
722 ret = -EINVAL;
723 goto out;
724 }
725
726 /*
727 * Only support UD, RC.
728 * Need to check opcode table for thorough checking.
729 * opcode _UD _UC _RC
730 * _SEND x x x
731 * _SEND_WITH_IMM x x x
732 * _RDMA_WRITE x x
733 * _RDMA_WRITE_WITH_IMM x x
734 * _LOCAL_INV x x
735 * _SEND_WITH_INV x x
736 * _RDMA_READ x
737 * _ATOMIC_CMP_AND_SWP x
738 * _ATOMIC_FETCH_AND_ADD x
739 * _MASK_ATOMIC_CMP_AND_SWP x
740 * _MASK_ATOMIC_FETCH_AND_ADD x
741 * _REG_MR x
742 *
743 */
744 if (qp->ibqp.qp_type != IB_QPT_UD &&
745 qp->ibqp.qp_type != IB_QPT_RC &&
746 wr->opcode != IB_WR_SEND) {
747 dev_warn_ratelimited(&dev->pdev->dev,
748 "unsupported queuepair type\n");
749 *bad_wr = wr;
750 ret = -EINVAL;
751 goto out;
752 } else if (qp->ibqp.qp_type == IB_QPT_UD ||
753 qp->ibqp.qp_type == IB_QPT_GSI) {
754 if (wr->opcode != IB_WR_SEND &&
755 wr->opcode != IB_WR_SEND_WITH_IMM) {
756 dev_warn_ratelimited(&dev->pdev->dev,
757 "invalid send opcode\n");
758 *bad_wr = wr;
759 ret = -EINVAL;
760 goto out;
761 }
762 }
763
764 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, tail);
765 memset(wqe_hdr, 0, sizeof(*wqe_hdr));
766 wqe_hdr->wr_id = wr->wr_id;
767 wqe_hdr->num_sge = wr->num_sge;
768 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode);
769 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags);
770 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
771 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
772 wqe_hdr->ex.imm_data = wr->ex.imm_data;
773
774 if (unlikely(wqe_hdr->opcode == PVRDMA_WR_ERROR)) {
775 *bad_wr = wr;
776 ret = -EINVAL;
777 goto out;
778 }
779
780 switch (qp->ibqp.qp_type) {
781 case IB_QPT_GSI:
782 case IB_QPT_UD:
783 if (unlikely(!ud_wr(wr)->ah)) {
784 dev_warn_ratelimited(&dev->pdev->dev,
785 "invalid address handle\n");
786 *bad_wr = wr;
787 ret = -EINVAL;
788 goto out;
789 }
790
791 /*
792 * Use qkey from qp context if high order bit set,
793 * otherwise from work request.
794 */
795 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn;
796 wqe_hdr->wr.ud.remote_qkey =
797 ud_wr(wr)->remote_qkey & 0x80000000 ?
798 qp->qkey : ud_wr(wr)->remote_qkey;
799 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av;
800
801 break;
802 case IB_QPT_RC:
803 switch (wr->opcode) {
804 case IB_WR_RDMA_READ:
805 case IB_WR_RDMA_WRITE:
806 case IB_WR_RDMA_WRITE_WITH_IMM:
807 wqe_hdr->wr.rdma.remote_addr =
808 rdma_wr(wr)->remote_addr;
809 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey;
810 break;
811 case IB_WR_LOCAL_INV:
812 case IB_WR_SEND_WITH_INV:
813 wqe_hdr->ex.invalidate_rkey =
814 wr->ex.invalidate_rkey;
815 break;
816 case IB_WR_ATOMIC_CMP_AND_SWP:
817 case IB_WR_ATOMIC_FETCH_AND_ADD:
818 wqe_hdr->wr.atomic.remote_addr =
819 atomic_wr(wr)->remote_addr;
820 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey;
821 wqe_hdr->wr.atomic.compare_add =
822 atomic_wr(wr)->compare_add;
823 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP)
824 wqe_hdr->wr.atomic.swap =
825 atomic_wr(wr)->swap;
826 break;
827 case IB_WR_REG_MR:
828 ret = set_reg_seg(wqe_hdr, reg_wr(wr));
829 if (ret < 0) {
830 dev_warn_ratelimited(&dev->pdev->dev,
831 "Failed to set fast register work request\n");
832 *bad_wr = wr;
833 goto out;
834 }
835 break;
836 default:
837 break;
838 }
839
840 break;
841 default:
842 dev_warn_ratelimited(&dev->pdev->dev,
843 "invalid queuepair type\n");
844 ret = -EINVAL;
845 *bad_wr = wr;
846 goto out;
847 }
848
849 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
850 for (i = 0; i < wr->num_sge; i++) {
851 /* Need to check wqe_size 0 or max size */
852 sge->addr = wr->sg_list[i].addr;
853 sge->length = wr->sg_list[i].length;
854 sge->lkey = wr->sg_list[i].lkey;
855 sge++;
856 }
857
858 /* Make sure wqe is written before index update */
859 smp_wmb();
860
861 /* Update shared sq ring */
862 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail,
863 qp->sq.wqe_cnt);
864
865 wr = wr->next;
866 }
867
868 ret = 0;
869
870 out:
871 spin_unlock_irqrestore(&qp->sq.lock, flags);
872
873 if (!ret)
874 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle);
875
876 return ret;
877 }
878
879 /**
880 * pvrdma_post_receive - post receive work request entries on a QP
881 * @ibqp: the QP
882 * @wr: the work request list to post
883 * @bad_wr: the first bad WR returned
884 *
885 * @return: 0 on success, otherwise errno returned.
886 */
887 int pvrdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
888 const struct ib_recv_wr **bad_wr)
889 {
890 struct pvrdma_dev *dev = to_vdev(ibqp->device);
891 unsigned long flags;
892 struct pvrdma_qp *qp = to_vqp(ibqp);
893 struct pvrdma_rq_wqe_hdr *wqe_hdr;
894 struct pvrdma_sge *sge;
895 int ret = 0;
896 int i;
897
898 /*
899 * In the RESET state, we can fail immediately. For other states,
900 * just post and let the device figure it out.
901 */
902 if (qp->state == IB_QPS_RESET) {
903 *bad_wr = wr;
904 return -EINVAL;
905 }
906
907 if (qp->srq) {
908 dev_warn(&dev->pdev->dev, "QP associated with SRQ\n");
909 *bad_wr = wr;
910 return -EINVAL;
911 }
912
913 spin_lock_irqsave(&qp->rq.lock, flags);
914
915 while (wr) {
916 unsigned int tail = 0;
917
918 if (unlikely(wr->num_sge > qp->rq.max_sg ||
919 wr->num_sge < 0)) {
920 ret = -EINVAL;
921 *bad_wr = wr;
922 dev_warn_ratelimited(&dev->pdev->dev,
923 "recv SGE overflow\n");
924 goto out;
925 }
926
927 if (unlikely(!pvrdma_idx_ring_has_space(
928 qp->rq.ring, qp->rq.wqe_cnt, &tail))) {
929 ret = -ENOMEM;
930 *bad_wr = wr;
931 dev_warn_ratelimited(&dev->pdev->dev,
932 "recv queue full\n");
933 goto out;
934 }
935
936 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, tail);
937 wqe_hdr->wr_id = wr->wr_id;
938 wqe_hdr->num_sge = wr->num_sge;
939 wqe_hdr->total_len = 0;
940
941 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
942 for (i = 0; i < wr->num_sge; i++) {
943 sge->addr = wr->sg_list[i].addr;
944 sge->length = wr->sg_list[i].length;
945 sge->lkey = wr->sg_list[i].lkey;
946 sge++;
947 }
948
949 /* Make sure wqe is written before index update */
950 smp_wmb();
951
952 /* Update shared rq ring */
953 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail,
954 qp->rq.wqe_cnt);
955
956 wr = wr->next;
957 }
958
959 spin_unlock_irqrestore(&qp->rq.lock, flags);
960
961 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle);
962
963 return ret;
964
965 out:
966 spin_unlock_irqrestore(&qp->rq.lock, flags);
967
968 return ret;
969 }
970
971 /**
972 * pvrdma_query_qp - query a queue pair's attributes
973 * @ibqp: the queue pair to query
974 * @attr: the queue pair's attributes
975 * @attr_mask: attributes mask
976 * @init_attr: initial queue pair attributes
977 *
978 * @returns 0 on success, otherwise returns an errno.
979 */
980 int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
981 int attr_mask, struct ib_qp_init_attr *init_attr)
982 {
983 struct pvrdma_dev *dev = to_vdev(ibqp->device);
984 struct pvrdma_qp *qp = to_vqp(ibqp);
985 union pvrdma_cmd_req req;
986 union pvrdma_cmd_resp rsp;
987 struct pvrdma_cmd_query_qp *cmd = &req.query_qp;
988 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp;
989 int ret = 0;
990
991 mutex_lock(&qp->mutex);
992
993 if (qp->state == IB_QPS_RESET) {
994 attr->qp_state = IB_QPS_RESET;
995 goto out;
996 }
997
998 memset(cmd, 0, sizeof(*cmd));
999 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP;
1000 cmd->qp_handle = qp->qp_handle;
1001 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
1002
1003 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP);
1004 if (ret < 0) {
1005 dev_warn(&dev->pdev->dev,
1006 "could not query queuepair, error: %d\n", ret);
1007 goto out;
1008 }
1009
1010 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state);
1011 attr->cur_qp_state =
1012 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state);
1013 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu);
1014 attr->path_mig_state =
1015 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state);
1016 attr->qkey = resp->attrs.qkey;
1017 attr->rq_psn = resp->attrs.rq_psn;
1018 attr->sq_psn = resp->attrs.sq_psn;
1019 attr->dest_qp_num = resp->attrs.dest_qp_num;
1020 attr->qp_access_flags =
1021 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags);
1022 attr->pkey_index = resp->attrs.pkey_index;
1023 attr->alt_pkey_index = resp->attrs.alt_pkey_index;
1024 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify;
1025 attr->sq_draining = resp->attrs.sq_draining;
1026 attr->max_rd_atomic = resp->attrs.max_rd_atomic;
1027 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic;
1028 attr->min_rnr_timer = resp->attrs.min_rnr_timer;
1029 attr->port_num = resp->attrs.port_num;
1030 attr->timeout = resp->attrs.timeout;
1031 attr->retry_cnt = resp->attrs.retry_cnt;
1032 attr->rnr_retry = resp->attrs.rnr_retry;
1033 attr->alt_port_num = resp->attrs.alt_port_num;
1034 attr->alt_timeout = resp->attrs.alt_timeout;
1035 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap);
1036 pvrdma_ah_attr_to_rdma(&attr->ah_attr, &resp->attrs.ah_attr);
1037 pvrdma_ah_attr_to_rdma(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr);
1038
1039 qp->state = attr->qp_state;
1040
1041 ret = 0;
1042
1043 out:
1044 attr->cur_qp_state = attr->qp_state;
1045
1046 init_attr->event_handler = qp->ibqp.event_handler;
1047 init_attr->qp_context = qp->ibqp.qp_context;
1048 init_attr->send_cq = qp->ibqp.send_cq;
1049 init_attr->recv_cq = qp->ibqp.recv_cq;
1050 init_attr->srq = qp->ibqp.srq;
1051 init_attr->xrcd = NULL;
1052 init_attr->cap = attr->cap;
1053 init_attr->sq_sig_type = 0;
1054 init_attr->qp_type = qp->ibqp.qp_type;
1055 init_attr->create_flags = 0;
1056 init_attr->port_num = qp->port;
1057
1058 mutex_unlock(&qp->mutex);
1059 return ret;
1060 }
Linux with added FPC-III support