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powerpc/mm/4k: don't allocate larger pmd page table for 4k
[linux/fpc-iii.git] / drivers / infiniband / hw / vmw_pvrdma / pvrdma_qp.c
blobc8c01e558125b94ba62e7861f11102f35acd9b2e
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 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
62 static 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
81 static 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
98 static 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
127 static 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
153 static int pvrdma_set_sq_size(struct pvrdma_dev *dev, struct ib_qp_cap *req_cap,
154 enum ib_qp_type type, struct pvrdma_qp *qp)
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. */
173 qp->npages_send = 1 + (qp->sq.wqe_cnt * qp->sq.wqe_size +
174 PAGE_SIZE - 1) / PAGE_SIZE;
175
176 return 0;
177 }
178
179 /**
180 * pvrdma_create_qp - create queue pair
181 * @pd: protection domain
182 * @init_attr: queue pair attributes
183 * @udata: user data
184 *
185 * @return: the ib_qp pointer on success, otherwise returns an errno.
186 */
187 struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
188 struct ib_qp_init_attr *init_attr,
189 struct ib_udata *udata)
190 {
191 struct pvrdma_qp *qp = NULL;
192 struct pvrdma_dev *dev = to_vdev(pd->device);
193 union pvrdma_cmd_req req;
194 union pvrdma_cmd_resp rsp;
195 struct pvrdma_cmd_create_qp *cmd = &req.create_qp;
196 struct pvrdma_cmd_create_qp_resp *resp = &rsp.create_qp_resp;
197 struct pvrdma_create_qp ucmd;
198 unsigned long flags;
199 int ret;
200
201 if (init_attr->create_flags) {
202 dev_warn(&dev->pdev->dev,
203 "invalid create queuepair flags %#x\n",
204 init_attr->create_flags);
205 return ERR_PTR(-EINVAL);
206 }
207
208 if (init_attr->qp_type != IB_QPT_RC &&
209 init_attr->qp_type != IB_QPT_UD &&
210 init_attr->qp_type != IB_QPT_GSI) {
211 dev_warn(&dev->pdev->dev, "queuepair type %d not supported\n",
212 init_attr->qp_type);
213 return ERR_PTR(-EINVAL);
214 }
215
216 if (!atomic_add_unless(&dev->num_qps, 1, dev->dsr->caps.max_qp))
217 return ERR_PTR(-ENOMEM);
218
219 switch (init_attr->qp_type) {
220 case IB_QPT_GSI:
221 if (init_attr->port_num == 0 ||
222 init_attr->port_num > pd->device->phys_port_cnt ||
223 udata) {
224 dev_warn(&dev->pdev->dev, "invalid queuepair attrs\n");
225 ret = -EINVAL;
226 goto err_qp;
227 }
228 /* fall through */
229 case IB_QPT_RC:
230 case IB_QPT_UD:
231 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
232 if (!qp) {
233 ret = -ENOMEM;
234 goto err_qp;
235 }
236
237 spin_lock_init(&qp->sq.lock);
238 spin_lock_init(&qp->rq.lock);
239 mutex_init(&qp->mutex);
240 atomic_set(&qp->refcnt, 1);
241 init_waitqueue_head(&qp->wait);
242
243 qp->state = IB_QPS_RESET;
244
245 if (pd->uobject && udata) {
246 dev_dbg(&dev->pdev->dev,
247 "create queuepair from user space\n");
248
249 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {
250 ret = -EFAULT;
251 goto err_qp;
252 }
253
254 /* set qp->sq.wqe_cnt, shift, buf_size.. */
255 qp->rumem = ib_umem_get(pd->uobject->context,
256 ucmd.rbuf_addr,
257 ucmd.rbuf_size, 0, 0);
258 if (IS_ERR(qp->rumem)) {
259 ret = PTR_ERR(qp->rumem);
260 goto err_qp;
261 }
262
263 qp->sumem = ib_umem_get(pd->uobject->context,
264 ucmd.sbuf_addr,
265 ucmd.sbuf_size, 0, 0);
266 if (IS_ERR(qp->sumem)) {
267 ib_umem_release(qp->rumem);
268 ret = PTR_ERR(qp->sumem);
269 goto err_qp;
270 }
271
272 qp->npages_send = ib_umem_page_count(qp->sumem);
273 qp->npages_recv = ib_umem_page_count(qp->rumem);
274 qp->npages = qp->npages_send + qp->npages_recv;
275 } else {
276 qp->is_kernel = true;
277
278 ret = pvrdma_set_sq_size(to_vdev(pd->device),
279 &init_attr->cap,
280 init_attr->qp_type, qp);
281 if (ret)
282 goto err_qp;
283
284 ret = pvrdma_set_rq_size(to_vdev(pd->device),
285 &init_attr->cap, qp);
286 if (ret)
287 goto err_qp;
288
289 qp->npages = qp->npages_send + qp->npages_recv;
290
291 /* Skip header page. */
292 qp->sq.offset = PAGE_SIZE;
293
294 /* Recv queue pages are after send pages. */
295 qp->rq.offset = qp->npages_send * PAGE_SIZE;
296 }
297
298 if (qp->npages < 0 || qp->npages > PVRDMA_PAGE_DIR_MAX_PAGES) {
299 dev_warn(&dev->pdev->dev,
300 "overflow pages in queuepair\n");
301 ret = -EINVAL;
302 goto err_umem;
303 }
304
305 ret = pvrdma_page_dir_init(dev, &qp->pdir, qp->npages,
306 qp->is_kernel);
307 if (ret) {
308 dev_warn(&dev->pdev->dev,
309 "could not allocate page directory\n");
310 goto err_umem;
311 }
312
313 if (!qp->is_kernel) {
314 pvrdma_page_dir_insert_umem(&qp->pdir, qp->sumem, 0);
315 pvrdma_page_dir_insert_umem(&qp->pdir, qp->rumem,
316 qp->npages_send);
317 } else {
318 /* Ring state is always the first page. */
319 qp->sq.ring = qp->pdir.pages[0];
320 qp->rq.ring = &qp->sq.ring[1];
321 }
322 break;
323 default:
324 ret = -EINVAL;
325 goto err_qp;
326 }
327
328 /* Not supported */
329 init_attr->cap.max_inline_data = 0;
330
331 memset(cmd, 0, sizeof(*cmd));
332 cmd->hdr.cmd = PVRDMA_CMD_CREATE_QP;
333 cmd->pd_handle = to_vpd(pd)->pd_handle;
334 cmd->send_cq_handle = to_vcq(init_attr->send_cq)->cq_handle;
335 cmd->recv_cq_handle = to_vcq(init_attr->recv_cq)->cq_handle;
336 cmd->max_send_wr = init_attr->cap.max_send_wr;
337 cmd->max_recv_wr = init_attr->cap.max_recv_wr;
338 cmd->max_send_sge = init_attr->cap.max_send_sge;
339 cmd->max_recv_sge = init_attr->cap.max_recv_sge;
340 cmd->max_inline_data = init_attr->cap.max_inline_data;
341 cmd->sq_sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) ? 1 : 0;
342 cmd->qp_type = ib_qp_type_to_pvrdma(init_attr->qp_type);
343 cmd->access_flags = IB_ACCESS_LOCAL_WRITE;
344 cmd->total_chunks = qp->npages;
345 cmd->send_chunks = qp->npages_send - 1;
346 cmd->pdir_dma = qp->pdir.dir_dma;
347
348 dev_dbg(&dev->pdev->dev, "create queuepair with %d, %d, %d, %d\n",
349 cmd->max_send_wr, cmd->max_recv_wr, cmd->max_send_sge,
350 cmd->max_recv_sge);
351
352 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_CREATE_QP_RESP);
353 if (ret < 0) {
354 dev_warn(&dev->pdev->dev,
355 "could not create queuepair, error: %d\n", ret);
356 goto err_pdir;
357 }
358
359 /* max_send_wr/_recv_wr/_send_sge/_recv_sge/_inline_data */
360 qp->qp_handle = resp->qpn;
361 qp->port = init_attr->port_num;
362 qp->ibqp.qp_num = resp->qpn;
363 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
364 dev->qp_tbl[qp->qp_handle % dev->dsr->caps.max_qp] = qp;
365 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
366
367 return &qp->ibqp;
368
369 err_pdir:
370 pvrdma_page_dir_cleanup(dev, &qp->pdir);
371 err_umem:
372 if (pd->uobject && udata) {
373 if (qp->rumem)
374 ib_umem_release(qp->rumem);
375 if (qp->sumem)
376 ib_umem_release(qp->sumem);
377 }
378 err_qp:
379 kfree(qp);
380 atomic_dec(&dev->num_qps);
381
382 return ERR_PTR(ret);
383 }
384
385 static void pvrdma_free_qp(struct pvrdma_qp *qp)
386 {
387 struct pvrdma_dev *dev = to_vdev(qp->ibqp.device);
388 struct pvrdma_cq *scq;
389 struct pvrdma_cq *rcq;
390 unsigned long flags, scq_flags, rcq_flags;
391
392 /* In case cq is polling */
393 get_cqs(qp, &scq, &rcq);
394 pvrdma_lock_cqs(scq, rcq, &scq_flags, &rcq_flags);
395
396 _pvrdma_flush_cqe(qp, scq);
397 if (scq != rcq)
398 _pvrdma_flush_cqe(qp, rcq);
399
400 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
401 dev->qp_tbl[qp->qp_handle] = NULL;
402 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
403
404 pvrdma_unlock_cqs(scq, rcq, &scq_flags, &rcq_flags);
405
406 atomic_dec(&qp->refcnt);
407 wait_event(qp->wait, !atomic_read(&qp->refcnt));
408
409 pvrdma_page_dir_cleanup(dev, &qp->pdir);
410
411 kfree(qp);
412
413 atomic_dec(&dev->num_qps);
414 }
415
416 /**
417 * pvrdma_destroy_qp - destroy a queue pair
418 * @qp: the queue pair to destroy
419 *
420 * @return: 0 on success.
421 */
422 int pvrdma_destroy_qp(struct ib_qp *qp)
423 {
424 struct pvrdma_qp *vqp = to_vqp(qp);
425 union pvrdma_cmd_req req;
426 struct pvrdma_cmd_destroy_qp *cmd = &req.destroy_qp;
427 int ret;
428
429 memset(cmd, 0, sizeof(*cmd));
430 cmd->hdr.cmd = PVRDMA_CMD_DESTROY_QP;
431 cmd->qp_handle = vqp->qp_handle;
432
433 ret = pvrdma_cmd_post(to_vdev(qp->device), &req, NULL, 0);
434 if (ret < 0)
435 dev_warn(&to_vdev(qp->device)->pdev->dev,
436 "destroy queuepair failed, error: %d\n", ret);
437
438 pvrdma_free_qp(vqp);
439
440 return 0;
441 }
442
443 /**
444 * pvrdma_modify_qp - modify queue pair attributes
445 * @ibqp: the queue pair
446 * @attr: the new queue pair's attributes
447 * @attr_mask: attributes mask
448 * @udata: user data
449 *
450 * @returns 0 on success, otherwise returns an errno.
451 */
452 int pvrdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
453 int attr_mask, struct ib_udata *udata)
454 {
455 struct pvrdma_dev *dev = to_vdev(ibqp->device);
456 struct pvrdma_qp *qp = to_vqp(ibqp);
457 union pvrdma_cmd_req req;
458 union pvrdma_cmd_resp rsp;
459 struct pvrdma_cmd_modify_qp *cmd = &req.modify_qp;
460 int cur_state, next_state;
461 int ret;
462
463 /* Sanity checking. Should need lock here */
464 mutex_lock(&qp->mutex);
465 cur_state = (attr_mask & IB_QP_CUR_STATE) ? attr->cur_qp_state :
466 qp->state;
467 next_state = (attr_mask & IB_QP_STATE) ? attr->qp_state : cur_state;
468
469 if (!ib_modify_qp_is_ok(cur_state, next_state, ibqp->qp_type,
470 attr_mask, IB_LINK_LAYER_ETHERNET)) {
471 ret = -EINVAL;
472 goto out;
473 }
474
475 if (attr_mask & IB_QP_PORT) {
476 if (attr->port_num == 0 ||
477 attr->port_num > ibqp->device->phys_port_cnt) {
478 ret = -EINVAL;
479 goto out;
480 }
481 }
482
483 if (attr_mask & IB_QP_MIN_RNR_TIMER) {
484 if (attr->min_rnr_timer > 31) {
485 ret = -EINVAL;
486 goto out;
487 }
488 }
489
490 if (attr_mask & IB_QP_PKEY_INDEX) {
491 if (attr->pkey_index >= dev->dsr->caps.max_pkeys) {
492 ret = -EINVAL;
493 goto out;
494 }
495 }
496
497 if (attr_mask & IB_QP_QKEY)
498 qp->qkey = attr->qkey;
499
500 if (cur_state == next_state && cur_state == IB_QPS_RESET) {
501 ret = 0;
502 goto out;
503 }
504
505 qp->state = next_state;
506 memset(cmd, 0, sizeof(*cmd));
507 cmd->hdr.cmd = PVRDMA_CMD_MODIFY_QP;
508 cmd->qp_handle = qp->qp_handle;
509 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
510 cmd->attrs.qp_state = ib_qp_state_to_pvrdma(attr->qp_state);
511 cmd->attrs.cur_qp_state =
512 ib_qp_state_to_pvrdma(attr->cur_qp_state);
513 cmd->attrs.path_mtu = ib_mtu_to_pvrdma(attr->path_mtu);
514 cmd->attrs.path_mig_state =
515 ib_mig_state_to_pvrdma(attr->path_mig_state);
516 cmd->attrs.qkey = attr->qkey;
517 cmd->attrs.rq_psn = attr->rq_psn;
518 cmd->attrs.sq_psn = attr->sq_psn;
519 cmd->attrs.dest_qp_num = attr->dest_qp_num;
520 cmd->attrs.qp_access_flags =
521 ib_access_flags_to_pvrdma(attr->qp_access_flags);
522 cmd->attrs.pkey_index = attr->pkey_index;
523 cmd->attrs.alt_pkey_index = attr->alt_pkey_index;
524 cmd->attrs.en_sqd_async_notify = attr->en_sqd_async_notify;
525 cmd->attrs.sq_draining = attr->sq_draining;
526 cmd->attrs.max_rd_atomic = attr->max_rd_atomic;
527 cmd->attrs.max_dest_rd_atomic = attr->max_dest_rd_atomic;
528 cmd->attrs.min_rnr_timer = attr->min_rnr_timer;
529 cmd->attrs.port_num = attr->port_num;
530 cmd->attrs.timeout = attr->timeout;
531 cmd->attrs.retry_cnt = attr->retry_cnt;
532 cmd->attrs.rnr_retry = attr->rnr_retry;
533 cmd->attrs.alt_port_num = attr->alt_port_num;
534 cmd->attrs.alt_timeout = attr->alt_timeout;
535 ib_qp_cap_to_pvrdma(&cmd->attrs.cap, &attr->cap);
536 ib_ah_attr_to_pvrdma(&cmd->attrs.ah_attr, &attr->ah_attr);
537 ib_ah_attr_to_pvrdma(&cmd->attrs.alt_ah_attr, &attr->alt_ah_attr);
538
539 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_MODIFY_QP_RESP);
540 if (ret < 0) {
541 dev_warn(&dev->pdev->dev,
542 "could not modify queuepair, error: %d\n", ret);
543 } else if (rsp.hdr.err > 0) {
544 dev_warn(&dev->pdev->dev,
545 "cannot modify queuepair, error: %d\n", rsp.hdr.err);
546 ret = -EINVAL;
547 }
548
549 if (ret == 0 && next_state == IB_QPS_RESET)
550 pvrdma_reset_qp(qp);
551
552 out:
553 mutex_unlock(&qp->mutex);
554
555 return ret;
556 }
557
558 static inline void *get_sq_wqe(struct pvrdma_qp *qp, int n)
559 {
560 return pvrdma_page_dir_get_ptr(&qp->pdir,
561 qp->sq.offset + n * qp->sq.wqe_size);
562 }
563
564 static inline void *get_rq_wqe(struct pvrdma_qp *qp, int n)
565 {
566 return pvrdma_page_dir_get_ptr(&qp->pdir,
567 qp->rq.offset + n * qp->rq.wqe_size);
568 }
569
570 static int set_reg_seg(struct pvrdma_sq_wqe_hdr *wqe_hdr, struct ib_reg_wr *wr)
571 {
572 struct pvrdma_user_mr *mr = to_vmr(wr->mr);
573
574 wqe_hdr->wr.fast_reg.iova_start = mr->ibmr.iova;
575 wqe_hdr->wr.fast_reg.pl_pdir_dma = mr->pdir.dir_dma;
576 wqe_hdr->wr.fast_reg.page_shift = mr->page_shift;
577 wqe_hdr->wr.fast_reg.page_list_len = mr->npages;
578 wqe_hdr->wr.fast_reg.length = mr->ibmr.length;
579 wqe_hdr->wr.fast_reg.access_flags = wr->access;
580 wqe_hdr->wr.fast_reg.rkey = wr->key;
581
582 return pvrdma_page_dir_insert_page_list(&mr->pdir, mr->pages,
583 mr->npages);
584 }
585
586 /**
587 * pvrdma_post_send - post send work request entries on a QP
588 * @ibqp: the QP
589 * @wr: work request list to post
590 * @bad_wr: the first bad WR returned
591 *
592 * @return: 0 on success, otherwise errno returned.
593 */
594 int pvrdma_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
595 struct ib_send_wr **bad_wr)
596 {
597 struct pvrdma_qp *qp = to_vqp(ibqp);
598 struct pvrdma_dev *dev = to_vdev(ibqp->device);
599 unsigned long flags;
600 struct pvrdma_sq_wqe_hdr *wqe_hdr;
601 struct pvrdma_sge *sge;
602 int i, index;
603 int nreq;
604 int ret;
605
606 /*
607 * In states lower than RTS, we can fail immediately. In other states,
608 * just post and let the device figure it out.
609 */
610 if (qp->state < IB_QPS_RTS) {
611 *bad_wr = wr;
612 return -EINVAL;
613 }
614
615 spin_lock_irqsave(&qp->sq.lock, flags);
616
617 index = pvrdma_idx(&qp->sq.ring->prod_tail, qp->sq.wqe_cnt);
618 for (nreq = 0; wr; nreq++, wr = wr->next) {
619 unsigned int tail;
620
621 if (unlikely(!pvrdma_idx_ring_has_space(
622 qp->sq.ring, qp->sq.wqe_cnt, &tail))) {
623 dev_warn_ratelimited(&dev->pdev->dev,
624 "send queue is full\n");
625 *bad_wr = wr;
626 ret = -ENOMEM;
627 goto out;
628 }
629
630 if (unlikely(wr->num_sge > qp->sq.max_sg || wr->num_sge < 0)) {
631 dev_warn_ratelimited(&dev->pdev->dev,
632 "send SGE overflow\n");
633 *bad_wr = wr;
634 ret = -EINVAL;
635 goto out;
636 }
637
638 if (unlikely(wr->opcode < 0)) {
639 dev_warn_ratelimited(&dev->pdev->dev,
640 "invalid send opcode\n");
641 *bad_wr = wr;
642 ret = -EINVAL;
643 goto out;
644 }
645
646 /*
647 * Only support UD, RC.
648 * Need to check opcode table for thorough checking.
649 * opcode _UD _UC _RC
650 * _SEND x x x
651 * _SEND_WITH_IMM x x x
652 * _RDMA_WRITE x x
653 * _RDMA_WRITE_WITH_IMM x x
654 * _LOCAL_INV x x
655 * _SEND_WITH_INV x x
656 * _RDMA_READ x
657 * _ATOMIC_CMP_AND_SWP x
658 * _ATOMIC_FETCH_AND_ADD x
659 * _MASK_ATOMIC_CMP_AND_SWP x
660 * _MASK_ATOMIC_FETCH_AND_ADD x
661 * _REG_MR x
662 *
663 */
664 if (qp->ibqp.qp_type != IB_QPT_UD &&
665 qp->ibqp.qp_type != IB_QPT_RC &&
666 wr->opcode != IB_WR_SEND) {
667 dev_warn_ratelimited(&dev->pdev->dev,
668 "unsupported queuepair type\n");
669 *bad_wr = wr;
670 ret = -EINVAL;
671 goto out;
672 } else if (qp->ibqp.qp_type == IB_QPT_UD ||
673 qp->ibqp.qp_type == IB_QPT_GSI) {
674 if (wr->opcode != IB_WR_SEND &&
675 wr->opcode != IB_WR_SEND_WITH_IMM) {
676 dev_warn_ratelimited(&dev->pdev->dev,
677 "invalid send opcode\n");
678 *bad_wr = wr;
679 ret = -EINVAL;
680 goto out;
681 }
682 }
683
684 wqe_hdr = (struct pvrdma_sq_wqe_hdr *)get_sq_wqe(qp, index);
685 memset(wqe_hdr, 0, sizeof(*wqe_hdr));
686 wqe_hdr->wr_id = wr->wr_id;
687 wqe_hdr->num_sge = wr->num_sge;
688 wqe_hdr->opcode = ib_wr_opcode_to_pvrdma(wr->opcode);
689 wqe_hdr->send_flags = ib_send_flags_to_pvrdma(wr->send_flags);
690 if (wr->opcode == IB_WR_SEND_WITH_IMM ||
691 wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
692 wqe_hdr->ex.imm_data = wr->ex.imm_data;
693
694 switch (qp->ibqp.qp_type) {
695 case IB_QPT_GSI:
696 case IB_QPT_UD:
697 if (unlikely(!ud_wr(wr)->ah)) {
698 dev_warn_ratelimited(&dev->pdev->dev,
699 "invalid address handle\n");
700 *bad_wr = wr;
701 ret = -EINVAL;
702 goto out;
703 }
704
705 /*
706 * Use qkey from qp context if high order bit set,
707 * otherwise from work request.
708 */
709 wqe_hdr->wr.ud.remote_qpn = ud_wr(wr)->remote_qpn;
710 wqe_hdr->wr.ud.remote_qkey =
711 ud_wr(wr)->remote_qkey & 0x80000000 ?
712 qp->qkey : ud_wr(wr)->remote_qkey;
713 wqe_hdr->wr.ud.av = to_vah(ud_wr(wr)->ah)->av;
714
715 break;
716 case IB_QPT_RC:
717 switch (wr->opcode) {
718 case IB_WR_RDMA_READ:
719 case IB_WR_RDMA_WRITE:
720 case IB_WR_RDMA_WRITE_WITH_IMM:
721 wqe_hdr->wr.rdma.remote_addr =
722 rdma_wr(wr)->remote_addr;
723 wqe_hdr->wr.rdma.rkey = rdma_wr(wr)->rkey;
724 break;
725 case IB_WR_LOCAL_INV:
726 case IB_WR_SEND_WITH_INV:
727 wqe_hdr->ex.invalidate_rkey =
728 wr->ex.invalidate_rkey;
729 break;
730 case IB_WR_ATOMIC_CMP_AND_SWP:
731 case IB_WR_ATOMIC_FETCH_AND_ADD:
732 wqe_hdr->wr.atomic.remote_addr =
733 atomic_wr(wr)->remote_addr;
734 wqe_hdr->wr.atomic.rkey = atomic_wr(wr)->rkey;
735 wqe_hdr->wr.atomic.compare_add =
736 atomic_wr(wr)->compare_add;
737 if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP)
738 wqe_hdr->wr.atomic.swap =
739 atomic_wr(wr)->swap;
740 break;
741 case IB_WR_REG_MR:
742 ret = set_reg_seg(wqe_hdr, reg_wr(wr));
743 if (ret < 0) {
744 dev_warn_ratelimited(&dev->pdev->dev,
745 "Failed to set fast register work request\n");
746 *bad_wr = wr;
747 goto out;
748 }
749 break;
750 default:
751 break;
752 }
753
754 break;
755 default:
756 dev_warn_ratelimited(&dev->pdev->dev,
757 "invalid queuepair type\n");
758 ret = -EINVAL;
759 *bad_wr = wr;
760 goto out;
761 }
762
763 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
764 for (i = 0; i < wr->num_sge; i++) {
765 /* Need to check wqe_size 0 or max size */
766 sge->addr = wr->sg_list[i].addr;
767 sge->length = wr->sg_list[i].length;
768 sge->lkey = wr->sg_list[i].lkey;
769 sge++;
770 }
771
772 /* Make sure wqe is written before index update */
773 smp_wmb();
774
775 index++;
776 if (unlikely(index >= qp->sq.wqe_cnt))
777 index = 0;
778 /* Update shared sq ring */
779 pvrdma_idx_ring_inc(&qp->sq.ring->prod_tail,
780 qp->sq.wqe_cnt);
781 }
782
783 ret = 0;
784
785 out:
786 spin_unlock_irqrestore(&qp->sq.lock, flags);
787
788 if (!ret)
789 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_SEND | qp->qp_handle);
790
791 return ret;
792 }
793
794 /**
795 * pvrdma_post_receive - post receive work request entries on a QP
796 * @ibqp: the QP
797 * @wr: the work request list to post
798 * @bad_wr: the first bad WR returned
799 *
800 * @return: 0 on success, otherwise errno returned.
801 */
802 int pvrdma_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
803 struct ib_recv_wr **bad_wr)
804 {
805 struct pvrdma_dev *dev = to_vdev(ibqp->device);
806 unsigned long flags;
807 struct pvrdma_qp *qp = to_vqp(ibqp);
808 struct pvrdma_rq_wqe_hdr *wqe_hdr;
809 struct pvrdma_sge *sge;
810 int index, nreq;
811 int ret = 0;
812 int i;
813
814 /*
815 * In the RESET state, we can fail immediately. For other states,
816 * just post and let the device figure it out.
817 */
818 if (qp->state == IB_QPS_RESET) {
819 *bad_wr = wr;
820 return -EINVAL;
821 }
822
823 spin_lock_irqsave(&qp->rq.lock, flags);
824
825 index = pvrdma_idx(&qp->rq.ring->prod_tail, qp->rq.wqe_cnt);
826 for (nreq = 0; wr; nreq++, wr = wr->next) {
827 unsigned int tail;
828
829 if (unlikely(wr->num_sge > qp->rq.max_sg ||
830 wr->num_sge < 0)) {
831 ret = -EINVAL;
832 *bad_wr = wr;
833 dev_warn_ratelimited(&dev->pdev->dev,
834 "recv SGE overflow\n");
835 goto out;
836 }
837
838 if (unlikely(!pvrdma_idx_ring_has_space(
839 qp->rq.ring, qp->rq.wqe_cnt, &tail))) {
840 ret = -ENOMEM;
841 *bad_wr = wr;
842 dev_warn_ratelimited(&dev->pdev->dev,
843 "recv queue full\n");
844 goto out;
845 }
846
847 wqe_hdr = (struct pvrdma_rq_wqe_hdr *)get_rq_wqe(qp, index);
848 wqe_hdr->wr_id = wr->wr_id;
849 wqe_hdr->num_sge = wr->num_sge;
850 wqe_hdr->total_len = 0;
851
852 sge = (struct pvrdma_sge *)(wqe_hdr + 1);
853 for (i = 0; i < wr->num_sge; i++) {
854 sge->addr = wr->sg_list[i].addr;
855 sge->length = wr->sg_list[i].length;
856 sge->lkey = wr->sg_list[i].lkey;
857 sge++;
858 }
859
860 /* Make sure wqe is written before index update */
861 smp_wmb();
862
863 index++;
864 if (unlikely(index >= qp->rq.wqe_cnt))
865 index = 0;
866 /* Update shared rq ring */
867 pvrdma_idx_ring_inc(&qp->rq.ring->prod_tail,
868 qp->rq.wqe_cnt);
869 }
870
871 spin_unlock_irqrestore(&qp->rq.lock, flags);
872
873 pvrdma_write_uar_qp(dev, PVRDMA_UAR_QP_RECV | qp->qp_handle);
874
875 return ret;
876
877 out:
878 spin_unlock_irqrestore(&qp->rq.lock, flags);
879
880 return ret;
881 }
882
883 /**
884 * pvrdma_query_qp - query a queue pair's attributes
885 * @ibqp: the queue pair to query
886 * @attr: the queue pair's attributes
887 * @attr_mask: attributes mask
888 * @init_attr: initial queue pair attributes
889 *
890 * @returns 0 on success, otherwise returns an errno.
891 */
892 int pvrdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
893 int attr_mask, struct ib_qp_init_attr *init_attr)
894 {
895 struct pvrdma_dev *dev = to_vdev(ibqp->device);
896 struct pvrdma_qp *qp = to_vqp(ibqp);
897 union pvrdma_cmd_req req;
898 union pvrdma_cmd_resp rsp;
899 struct pvrdma_cmd_query_qp *cmd = &req.query_qp;
900 struct pvrdma_cmd_query_qp_resp *resp = &rsp.query_qp_resp;
901 int ret = 0;
902
903 mutex_lock(&qp->mutex);
904
905 if (qp->state == IB_QPS_RESET) {
906 attr->qp_state = IB_QPS_RESET;
907 goto out;
908 }
909
910 memset(cmd, 0, sizeof(*cmd));
911 cmd->hdr.cmd = PVRDMA_CMD_QUERY_QP;
912 cmd->qp_handle = qp->qp_handle;
913 cmd->attr_mask = ib_qp_attr_mask_to_pvrdma(attr_mask);
914
915 ret = pvrdma_cmd_post(dev, &req, &rsp, PVRDMA_CMD_QUERY_QP_RESP);
916 if (ret < 0) {
917 dev_warn(&dev->pdev->dev,
918 "could not query queuepair, error: %d\n", ret);
919 goto out;
920 }
921
922 attr->qp_state = pvrdma_qp_state_to_ib(resp->attrs.qp_state);
923 attr->cur_qp_state =
924 pvrdma_qp_state_to_ib(resp->attrs.cur_qp_state);
925 attr->path_mtu = pvrdma_mtu_to_ib(resp->attrs.path_mtu);
926 attr->path_mig_state =
927 pvrdma_mig_state_to_ib(resp->attrs.path_mig_state);
928 attr->qkey = resp->attrs.qkey;
929 attr->rq_psn = resp->attrs.rq_psn;
930 attr->sq_psn = resp->attrs.sq_psn;
931 attr->dest_qp_num = resp->attrs.dest_qp_num;
932 attr->qp_access_flags =
933 pvrdma_access_flags_to_ib(resp->attrs.qp_access_flags);
934 attr->pkey_index = resp->attrs.pkey_index;
935 attr->alt_pkey_index = resp->attrs.alt_pkey_index;
936 attr->en_sqd_async_notify = resp->attrs.en_sqd_async_notify;
937 attr->sq_draining = resp->attrs.sq_draining;
938 attr->max_rd_atomic = resp->attrs.max_rd_atomic;
939 attr->max_dest_rd_atomic = resp->attrs.max_dest_rd_atomic;
940 attr->min_rnr_timer = resp->attrs.min_rnr_timer;
941 attr->port_num = resp->attrs.port_num;
942 attr->timeout = resp->attrs.timeout;
943 attr->retry_cnt = resp->attrs.retry_cnt;
944 attr->rnr_retry = resp->attrs.rnr_retry;
945 attr->alt_port_num = resp->attrs.alt_port_num;
946 attr->alt_timeout = resp->attrs.alt_timeout;
947 pvrdma_qp_cap_to_ib(&attr->cap, &resp->attrs.cap);
948 pvrdma_ah_attr_to_ib(&attr->ah_attr, &resp->attrs.ah_attr);
949 pvrdma_ah_attr_to_ib(&attr->alt_ah_attr, &resp->attrs.alt_ah_attr);
950
951 qp->state = attr->qp_state;
952
953 ret = 0;
954
955 out:
956 attr->cur_qp_state = attr->qp_state;
957
958 init_attr->event_handler = qp->ibqp.event_handler;
959 init_attr->qp_context = qp->ibqp.qp_context;
960 init_attr->send_cq = qp->ibqp.send_cq;
961 init_attr->recv_cq = qp->ibqp.recv_cq;
962 init_attr->srq = qp->ibqp.srq;
963 init_attr->xrcd = NULL;
964 init_attr->cap = attr->cap;
965 init_attr->sq_sig_type = 0;
966 init_attr->qp_type = qp->ibqp.qp_type;
967 init_attr->create_flags = 0;
968 init_attr->port_num = qp->port;
969
970 mutex_unlock(&qp->mutex);
971 return ret;
972 }
Linux with added FPC-III support