1 /*
2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
4 * Copyright (c) 2004 Intel Corporation. All rights reserved.
5 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.
7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
8 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
9 *
10 * This software is available to you under a choice of one of two
11 * licenses. You may choose to be licensed under the terms of the GNU
12 * General Public License (GPL) Version 2, available from the file
13 * COPYING in the main directory of this source tree, or the
14 * OpenIB.org BSD license below:
15 *
16 * Redistribution and use in source and binary forms, with or
17 * without modification, are permitted provided that the following
18 * conditions are met:
19 *
20 * - Redistributions of source code must retain the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer.
23 *
24 * - Redistributions in binary form must reproduce the above
25 * copyright notice, this list of conditions and the following
26 * disclaimer in the documentation and/or other materials
27 * provided with the distribution.
28 *
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 * SOFTWARE.
37 *
38 * $Id: verbs.c 1349 2004-12-16 21:09:43Z roland $
39 */
40
41 #include <linux/errno.h>
42 #include <linux/err.h>
43 #include <linux/string.h>
44
45 #include <rdma/ib_verbs.h>
46 #include <rdma/ib_cache.h>
47
48 int ib_rate_to_mult(enum ib_rate rate)
49 {
50 switch (rate) {
51 case IB_RATE_2_5_GBPS: return 1;
52 case IB_RATE_5_GBPS: return 2;
53 case IB_RATE_10_GBPS: return 4;
54 case IB_RATE_20_GBPS: return 8;
55 case IB_RATE_30_GBPS: return 12;
56 case IB_RATE_40_GBPS: return 16;
57 case IB_RATE_60_GBPS: return 24;
58 case IB_RATE_80_GBPS: return 32;
59 case IB_RATE_120_GBPS: return 48;
60 default: return -1;
61 }
62 }
63 EXPORT_SYMBOL(ib_rate_to_mult);
64
65 enum ib_rate mult_to_ib_rate(int mult)
66 {
67 switch (mult) {
68 case 1: return IB_RATE_2_5_GBPS;
69 case 2: return IB_RATE_5_GBPS;
70 case 4: return IB_RATE_10_GBPS;
71 case 8: return IB_RATE_20_GBPS;
72 case 12: return IB_RATE_30_GBPS;
73 case 16: return IB_RATE_40_GBPS;
74 case 24: return IB_RATE_60_GBPS;
75 case 32: return IB_RATE_80_GBPS;
76 case 48: return IB_RATE_120_GBPS;
77 default: return IB_RATE_PORT_CURRENT;
78 }
79 }
80 EXPORT_SYMBOL(mult_to_ib_rate);
81
82 enum rdma_transport_type
83 rdma_node_get_transport(enum rdma_node_type node_type)
84 {
85 switch (node_type) {
86 case RDMA_NODE_IB_CA:
87 case RDMA_NODE_IB_SWITCH:
88 case RDMA_NODE_IB_ROUTER:
89 return RDMA_TRANSPORT_IB;
90 case RDMA_NODE_RNIC:
91 return RDMA_TRANSPORT_IWARP;
92 default:
93 BUG();
94 return 0;
95 }
96 }
97 EXPORT_SYMBOL(rdma_node_get_transport);
98
99 /* Protection domains */
100
101 struct ib_pd *ib_alloc_pd(struct ib_device *device)
102 {
103 struct ib_pd *pd;
104
105 pd = device->alloc_pd(device, NULL, NULL);
106
107 if (!IS_ERR(pd)) {
108 pd->device = device;
109 pd->uobject = NULL;
110 atomic_set(&pd->usecnt, 0);
111 }
112
113 return pd;
114 }
115 EXPORT_SYMBOL(ib_alloc_pd);
116
117 int ib_dealloc_pd(struct ib_pd *pd)
118 {
119 if (atomic_read(&pd->usecnt))
120 return -EBUSY;
121
122 return pd->device->dealloc_pd(pd);
123 }
124 EXPORT_SYMBOL(ib_dealloc_pd);
125
126 /* Address handles */
127
128 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
129 {
130 struct ib_ah *ah;
131
132 ah = pd->device->create_ah(pd, ah_attr);
133
134 if (!IS_ERR(ah)) {
135 ah->device = pd->device;
136 ah->pd = pd;
137 ah->uobject = NULL;
138 atomic_inc(&pd->usecnt);
139 }
140
141 return ah;
142 }
143 EXPORT_SYMBOL(ib_create_ah);
144
145 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
146 struct ib_grh *grh, struct ib_ah_attr *ah_attr)
147 {
148 u32 flow_class;
149 u16 gid_index;
150 int ret;
151
152 memset(ah_attr, 0, sizeof *ah_attr);
153 ah_attr->dlid = wc->slid;
154 ah_attr->sl = wc->sl;
155 ah_attr->src_path_bits = wc->dlid_path_bits;
156 ah_attr->port_num = port_num;
157
158 if (wc->wc_flags & IB_WC_GRH) {
159 ah_attr->ah_flags = IB_AH_GRH;
160 ah_attr->grh.dgid = grh->sgid;
161
162 ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
163 &gid_index);
164 if (ret)
165 return ret;
166
167 ah_attr->grh.sgid_index = (u8) gid_index;
168 flow_class = be32_to_cpu(grh->version_tclass_flow);
169 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
170 ah_attr->grh.hop_limit = 0xFF;
171 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
172 }
173 return 0;
174 }
175 EXPORT_SYMBOL(ib_init_ah_from_wc);
176
177 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
178 struct ib_grh *grh, u8 port_num)
179 {
180 struct ib_ah_attr ah_attr;
181 int ret;
182
183 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
184 if (ret)
185 return ERR_PTR(ret);
186
187 return ib_create_ah(pd, &ah_attr);
188 }
189 EXPORT_SYMBOL(ib_create_ah_from_wc);
190
191 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
192 {
193 return ah->device->modify_ah ?
194 ah->device->modify_ah(ah, ah_attr) :
195 -ENOSYS;
196 }
197 EXPORT_SYMBOL(ib_modify_ah);
198
199 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
200 {
201 return ah->device->query_ah ?
202 ah->device->query_ah(ah, ah_attr) :
203 -ENOSYS;
204 }
205 EXPORT_SYMBOL(ib_query_ah);
206
207 int ib_destroy_ah(struct ib_ah *ah)
208 {
209 struct ib_pd *pd;
210 int ret;
211
212 pd = ah->pd;
213 ret = ah->device->destroy_ah(ah);
214 if (!ret)
215 atomic_dec(&pd->usecnt);
216
217 return ret;
218 }
219 EXPORT_SYMBOL(ib_destroy_ah);
220
221 /* Shared receive queues */
222
223 struct ib_srq *ib_create_srq(struct ib_pd *pd,
224 struct ib_srq_init_attr *srq_init_attr)
225 {
226 struct ib_srq *srq;
227
228 if (!pd->device->create_srq)
229 return ERR_PTR(-ENOSYS);
230
231 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
232
233 if (!IS_ERR(srq)) {
234 srq->device = pd->device;
235 srq->pd = pd;
236 srq->uobject = NULL;
237 srq->event_handler = srq_init_attr->event_handler;
238 srq->srq_context = srq_init_attr->srq_context;
239 atomic_inc(&pd->usecnt);
240 atomic_set(&srq->usecnt, 0);
241 }
242
243 return srq;
244 }
245 EXPORT_SYMBOL(ib_create_srq);
246
247 int ib_modify_srq(struct ib_srq *srq,
248 struct ib_srq_attr *srq_attr,
249 enum ib_srq_attr_mask srq_attr_mask)
250 {
251 return srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL);
252 }
253 EXPORT_SYMBOL(ib_modify_srq);
254
255 int ib_query_srq(struct ib_srq *srq,
256 struct ib_srq_attr *srq_attr)
257 {
258 return srq->device->query_srq ?
259 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
260 }
261 EXPORT_SYMBOL(ib_query_srq);
262
263 int ib_destroy_srq(struct ib_srq *srq)
264 {
265 struct ib_pd *pd;
266 int ret;
267
268 if (atomic_read(&srq->usecnt))
269 return -EBUSY;
270
271 pd = srq->pd;
272
273 ret = srq->device->destroy_srq(srq);
274 if (!ret)
275 atomic_dec(&pd->usecnt);
276
277 return ret;
278 }
279 EXPORT_SYMBOL(ib_destroy_srq);
280
281 /* Queue pairs */
282
283 struct ib_qp *ib_create_qp(struct ib_pd *pd,
284 struct ib_qp_init_attr *qp_init_attr)
285 {
286 struct ib_qp *qp;
287
288 qp = pd->device->create_qp(pd, qp_init_attr, NULL);
289
290 if (!IS_ERR(qp)) {
291 qp->device = pd->device;
292 qp->pd = pd;
293 qp->send_cq = qp_init_attr->send_cq;
294 qp->recv_cq = qp_init_attr->recv_cq;
295 qp->srq = qp_init_attr->srq;
296 qp->uobject = NULL;
297 qp->event_handler = qp_init_attr->event_handler;
298 qp->qp_context = qp_init_attr->qp_context;
299 qp->qp_type = qp_init_attr->qp_type;
300 atomic_inc(&pd->usecnt);
301 atomic_inc(&qp_init_attr->send_cq->usecnt);
302 atomic_inc(&qp_init_attr->recv_cq->usecnt);
303 if (qp_init_attr->srq)
304 atomic_inc(&qp_init_attr->srq->usecnt);
305 }
306
307 return qp;
308 }
309 EXPORT_SYMBOL(ib_create_qp);
310
311 static const struct {
312 int valid;
313 enum ib_qp_attr_mask req_param[IB_QPT_RAW_ETY + 1];
314 enum ib_qp_attr_mask opt_param[IB_QPT_RAW_ETY + 1];
315 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
316 [IB_QPS_RESET] = {
317 [IB_QPS_RESET] = { .valid = 1 },
318 [IB_QPS_ERR] = { .valid = 1 },
319 [IB_QPS_INIT] = {
320 .valid = 1,
321 .req_param = {
322 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
323 IB_QP_PORT |
324 IB_QP_QKEY),
325 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
326 IB_QP_PORT |
327 IB_QP_ACCESS_FLAGS),
328 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
329 IB_QP_PORT |
330 IB_QP_ACCESS_FLAGS),
331 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
332 IB_QP_QKEY),
333 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
334 IB_QP_QKEY),
335 }
336 },
337 },
338 [IB_QPS_INIT] = {
339 [IB_QPS_RESET] = { .valid = 1 },
340 [IB_QPS_ERR] = { .valid = 1 },
341 [IB_QPS_INIT] = {
342 .valid = 1,
343 .opt_param = {
344 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
345 IB_QP_PORT |
346 IB_QP_QKEY),
347 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
348 IB_QP_PORT |
349 IB_QP_ACCESS_FLAGS),
350 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
351 IB_QP_PORT |
352 IB_QP_ACCESS_FLAGS),
353 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
354 IB_QP_QKEY),
355 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
356 IB_QP_QKEY),
357 }
358 },
359 [IB_QPS_RTR] = {
360 .valid = 1,
361 .req_param = {
362 [IB_QPT_UC] = (IB_QP_AV |
363 IB_QP_PATH_MTU |
364 IB_QP_DEST_QPN |
365 IB_QP_RQ_PSN),
366 [IB_QPT_RC] = (IB_QP_AV |
367 IB_QP_PATH_MTU |
368 IB_QP_DEST_QPN |
369 IB_QP_RQ_PSN |
370 IB_QP_MAX_DEST_RD_ATOMIC |
371 IB_QP_MIN_RNR_TIMER),
372 },
373 .opt_param = {
374 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
375 IB_QP_QKEY),
376 [IB_QPT_UC] = (IB_QP_ALT_PATH |
377 IB_QP_ACCESS_FLAGS |
378 IB_QP_PKEY_INDEX),
379 [IB_QPT_RC] = (IB_QP_ALT_PATH |
380 IB_QP_ACCESS_FLAGS |
381 IB_QP_PKEY_INDEX),
382 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
383 IB_QP_QKEY),
384 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
385 IB_QP_QKEY),
386 }
387 }
388 },
389 [IB_QPS_RTR] = {
390 [IB_QPS_RESET] = { .valid = 1 },
391 [IB_QPS_ERR] = { .valid = 1 },
392 [IB_QPS_RTS] = {
393 .valid = 1,
394 .req_param = {
395 [IB_QPT_UD] = IB_QP_SQ_PSN,
396 [IB_QPT_UC] = IB_QP_SQ_PSN,
397 [IB_QPT_RC] = (IB_QP_TIMEOUT |
398 IB_QP_RETRY_CNT |
399 IB_QP_RNR_RETRY |
400 IB_QP_SQ_PSN |
401 IB_QP_MAX_QP_RD_ATOMIC),
402 [IB_QPT_SMI] = IB_QP_SQ_PSN,
403 [IB_QPT_GSI] = IB_QP_SQ_PSN,
404 },
405 .opt_param = {
406 [IB_QPT_UD] = (IB_QP_CUR_STATE |
407 IB_QP_QKEY),
408 [IB_QPT_UC] = (IB_QP_CUR_STATE |
409 IB_QP_ALT_PATH |
410 IB_QP_ACCESS_FLAGS |
411 IB_QP_PATH_MIG_STATE),
412 [IB_QPT_RC] = (IB_QP_CUR_STATE |
413 IB_QP_ALT_PATH |
414 IB_QP_ACCESS_FLAGS |
415 IB_QP_MIN_RNR_TIMER |
416 IB_QP_PATH_MIG_STATE),
417 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
418 IB_QP_QKEY),
419 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
420 IB_QP_QKEY),
421 }
422 }
423 },
424 [IB_QPS_RTS] = {
425 [IB_QPS_RESET] = { .valid = 1 },
426 [IB_QPS_ERR] = { .valid = 1 },
427 [IB_QPS_RTS] = {
428 .valid = 1,
429 .opt_param = {
430 [IB_QPT_UD] = (IB_QP_CUR_STATE |
431 IB_QP_QKEY),
432 [IB_QPT_UC] = (IB_QP_CUR_STATE |
433 IB_QP_ACCESS_FLAGS |
434 IB_QP_ALT_PATH |
435 IB_QP_PATH_MIG_STATE),
436 [IB_QPT_RC] = (IB_QP_CUR_STATE |
437 IB_QP_ACCESS_FLAGS |
438 IB_QP_ALT_PATH |
439 IB_QP_PATH_MIG_STATE |
440 IB_QP_MIN_RNR_TIMER),
441 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
442 IB_QP_QKEY),
443 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
444 IB_QP_QKEY),
445 }
446 },
447 [IB_QPS_SQD] = {
448 .valid = 1,
449 .opt_param = {
450 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
451 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
452 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
453 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
454 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
455 }
456 },
457 },
458 [IB_QPS_SQD] = {
459 [IB_QPS_RESET] = { .valid = 1 },
460 [IB_QPS_ERR] = { .valid = 1 },
461 [IB_QPS_RTS] = {
462 .valid = 1,
463 .opt_param = {
464 [IB_QPT_UD] = (IB_QP_CUR_STATE |
465 IB_QP_QKEY),
466 [IB_QPT_UC] = (IB_QP_CUR_STATE |
467 IB_QP_ALT_PATH |
468 IB_QP_ACCESS_FLAGS |
469 IB_QP_PATH_MIG_STATE),
470 [IB_QPT_RC] = (IB_QP_CUR_STATE |
471 IB_QP_ALT_PATH |
472 IB_QP_ACCESS_FLAGS |
473 IB_QP_MIN_RNR_TIMER |
474 IB_QP_PATH_MIG_STATE),
475 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
476 IB_QP_QKEY),
477 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
478 IB_QP_QKEY),
479 }
480 },
481 [IB_QPS_SQD] = {
482 .valid = 1,
483 .opt_param = {
484 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
485 IB_QP_QKEY),
486 [IB_QPT_UC] = (IB_QP_AV |
487 IB_QP_ALT_PATH |
488 IB_QP_ACCESS_FLAGS |
489 IB_QP_PKEY_INDEX |
490 IB_QP_PATH_MIG_STATE),
491 [IB_QPT_RC] = (IB_QP_PORT |
492 IB_QP_AV |
493 IB_QP_TIMEOUT |
494 IB_QP_RETRY_CNT |
495 IB_QP_RNR_RETRY |
496 IB_QP_MAX_QP_RD_ATOMIC |
497 IB_QP_MAX_DEST_RD_ATOMIC |
498 IB_QP_ALT_PATH |
499 IB_QP_ACCESS_FLAGS |
500 IB_QP_PKEY_INDEX |
501 IB_QP_MIN_RNR_TIMER |
502 IB_QP_PATH_MIG_STATE),
503 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
504 IB_QP_QKEY),
505 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
506 IB_QP_QKEY),
507 }
508 }
509 },
510 [IB_QPS_SQE] = {
511 [IB_QPS_RESET] = { .valid = 1 },
512 [IB_QPS_ERR] = { .valid = 1 },
513 [IB_QPS_RTS] = {
514 .valid = 1,
515 .opt_param = {
516 [IB_QPT_UD] = (IB_QP_CUR_STATE |
517 IB_QP_QKEY),
518 [IB_QPT_UC] = (IB_QP_CUR_STATE |
519 IB_QP_ACCESS_FLAGS),
520 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
521 IB_QP_QKEY),
522 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
523 IB_QP_QKEY),
524 }
525 }
526 },
527 [IB_QPS_ERR] = {
528 [IB_QPS_RESET] = { .valid = 1 },
529 [IB_QPS_ERR] = { .valid = 1 }
530 }
531 };
532
533 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
534 enum ib_qp_type type, enum ib_qp_attr_mask mask)
535 {
536 enum ib_qp_attr_mask req_param, opt_param;
537
538 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
539 next_state < 0 || next_state > IB_QPS_ERR)
540 return 0;
541
542 if (mask & IB_QP_CUR_STATE &&
543 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
544 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
545 return 0;
546
547 if (!qp_state_table[cur_state][next_state].valid)
548 return 0;
549
550 req_param = qp_state_table[cur_state][next_state].req_param[type];
551 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
552
553 if ((mask & req_param) != req_param)
554 return 0;
555
556 if (mask & ~(req_param | opt_param | IB_QP_STATE))
557 return 0;
558
559 return 1;
560 }
561 EXPORT_SYMBOL(ib_modify_qp_is_ok);
562
563 int ib_modify_qp(struct ib_qp *qp,
564 struct ib_qp_attr *qp_attr,
565 int qp_attr_mask)
566 {
567 return qp->device->modify_qp(qp, qp_attr, qp_attr_mask, NULL);
568 }
569 EXPORT_SYMBOL(ib_modify_qp);
570
571 int ib_query_qp(struct ib_qp *qp,
572 struct ib_qp_attr *qp_attr,
573 int qp_attr_mask,
574 struct ib_qp_init_attr *qp_init_attr)
575 {
576 return qp->device->query_qp ?
577 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) :
578 -ENOSYS;
579 }
580 EXPORT_SYMBOL(ib_query_qp);
581
582 int ib_destroy_qp(struct ib_qp *qp)
583 {
584 struct ib_pd *pd;
585 struct ib_cq *scq, *rcq;
586 struct ib_srq *srq;
587 int ret;
588
589 pd = qp->pd;
590 scq = qp->send_cq;
591 rcq = qp->recv_cq;
592 srq = qp->srq;
593
594 ret = qp->device->destroy_qp(qp);
595 if (!ret) {
596 atomic_dec(&pd->usecnt);
597 atomic_dec(&scq->usecnt);
598 atomic_dec(&rcq->usecnt);
599 if (srq)
600 atomic_dec(&srq->usecnt);
601 }
602
603 return ret;
604 }
605 EXPORT_SYMBOL(ib_destroy_qp);
606
607 /* Completion queues */
608
609 struct ib_cq *ib_create_cq(struct ib_device *device,
610 ib_comp_handler comp_handler,
611 void (*event_handler)(struct ib_event *, void *),
612 void *cq_context, int cqe, int comp_vector)
613 {
614 struct ib_cq *cq;
615
616 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
617
618 if (!IS_ERR(cq)) {
619 cq->device = device;
620 cq->uobject = NULL;
621 cq->comp_handler = comp_handler;
622 cq->event_handler = event_handler;
623 cq->cq_context = cq_context;
624 atomic_set(&cq->usecnt, 0);
625 }
626
627 return cq;
628 }
629 EXPORT_SYMBOL(ib_create_cq);
630
631 int ib_destroy_cq(struct ib_cq *cq)
632 {
633 if (atomic_read(&cq->usecnt))
634 return -EBUSY;
635
636 return cq->device->destroy_cq(cq);
637 }
638 EXPORT_SYMBOL(ib_destroy_cq);
639
640 int ib_resize_cq(struct ib_cq *cq, int cqe)
641 {
642 return cq->device->resize_cq ?
643 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
644 }
645 EXPORT_SYMBOL(ib_resize_cq);
646
647 /* Memory regions */
648
649 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
650 {
651 struct ib_mr *mr;
652
653 mr = pd->device->get_dma_mr(pd, mr_access_flags);
654
655 if (!IS_ERR(mr)) {
656 mr->device = pd->device;
657 mr->pd = pd;
658 mr->uobject = NULL;
659 atomic_inc(&pd->usecnt);
660 atomic_set(&mr->usecnt, 0);
661 }
662
663 return mr;
664 }
665 EXPORT_SYMBOL(ib_get_dma_mr);
666
667 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
668 struct ib_phys_buf *phys_buf_array,
669 int num_phys_buf,
670 int mr_access_flags,
671 u64 *iova_start)
672 {
673 struct ib_mr *mr;
674
675 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
676 mr_access_flags, iova_start);
677
678 if (!IS_ERR(mr)) {
679 mr->device = pd->device;
680 mr->pd = pd;
681 mr->uobject = NULL;
682 atomic_inc(&pd->usecnt);
683 atomic_set(&mr->usecnt, 0);
684 }
685
686 return mr;
687 }
688 EXPORT_SYMBOL(ib_reg_phys_mr);
689
690 int ib_rereg_phys_mr(struct ib_mr *mr,
691 int mr_rereg_mask,
692 struct ib_pd *pd,
693 struct ib_phys_buf *phys_buf_array,
694 int num_phys_buf,
695 int mr_access_flags,
696 u64 *iova_start)
697 {
698 struct ib_pd *old_pd;
699 int ret;
700
701 if (!mr->device->rereg_phys_mr)
702 return -ENOSYS;
703
704 if (atomic_read(&mr->usecnt))
705 return -EBUSY;
706
707 old_pd = mr->pd;
708
709 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
710 phys_buf_array, num_phys_buf,
711 mr_access_flags, iova_start);
712
713 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
714 atomic_dec(&old_pd->usecnt);
715 atomic_inc(&pd->usecnt);
716 }
717
718 return ret;
719 }
720 EXPORT_SYMBOL(ib_rereg_phys_mr);
721
722 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
723 {
724 return mr->device->query_mr ?
725 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
726 }
727 EXPORT_SYMBOL(ib_query_mr);
728
729 int ib_dereg_mr(struct ib_mr *mr)
730 {
731 struct ib_pd *pd;
732 int ret;
733
734 if (atomic_read(&mr->usecnt))
735 return -EBUSY;
736
737 pd = mr->pd;
738 ret = mr->device->dereg_mr(mr);
739 if (!ret)
740 atomic_dec(&pd->usecnt);
741
742 return ret;
743 }
744 EXPORT_SYMBOL(ib_dereg_mr);
745
746 /* Memory windows */
747
748 struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
749 {
750 struct ib_mw *mw;
751
752 if (!pd->device->alloc_mw)
753 return ERR_PTR(-ENOSYS);
754
755 mw = pd->device->alloc_mw(pd);
756 if (!IS_ERR(mw)) {
757 mw->device = pd->device;
758 mw->pd = pd;
759 mw->uobject = NULL;
760 atomic_inc(&pd->usecnt);
761 }
762
763 return mw;
764 }
765 EXPORT_SYMBOL(ib_alloc_mw);
766
767 int ib_dealloc_mw(struct ib_mw *mw)
768 {
769 struct ib_pd *pd;
770 int ret;
771
772 pd = mw->pd;
773 ret = mw->device->dealloc_mw(mw);
774 if (!ret)
775 atomic_dec(&pd->usecnt);
776
777 return ret;
778 }
779 EXPORT_SYMBOL(ib_dealloc_mw);
780
781 /* "Fast" memory regions */
782
783 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
784 int mr_access_flags,
785 struct ib_fmr_attr *fmr_attr)
786 {
787 struct ib_fmr *fmr;
788
789 if (!pd->device->alloc_fmr)
790 return ERR_PTR(-ENOSYS);
791
792 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
793 if (!IS_ERR(fmr)) {
794 fmr->device = pd->device;
795 fmr->pd = pd;
796 atomic_inc(&pd->usecnt);
797 }
798
799 return fmr;
800 }
801 EXPORT_SYMBOL(ib_alloc_fmr);
802
803 int ib_unmap_fmr(struct list_head *fmr_list)
804 {
805 struct ib_fmr *fmr;
806
807 if (list_empty(fmr_list))
808 return 0;
809
810 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
811 return fmr->device->unmap_fmr(fmr_list);
812 }
813 EXPORT_SYMBOL(ib_unmap_fmr);
814
815 int ib_dealloc_fmr(struct ib_fmr *fmr)
816 {
817 struct ib_pd *pd;
818 int ret;
819
820 pd = fmr->pd;
821 ret = fmr->device->dealloc_fmr(fmr);
822 if (!ret)
823 atomic_dec(&pd->usecnt);
824
825 return ret;
826 }
827 EXPORT_SYMBOL(ib_dealloc_fmr);
828
829 /* Multicast groups */
830
831 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
832 {
833 if (!qp->device->attach_mcast)
834 return -ENOSYS;
835 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
836 return -EINVAL;
837
838 return qp->device->attach_mcast(qp, gid, lid);
839 }
840 EXPORT_SYMBOL(ib_attach_mcast);
841
842 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
843 {
844 if (!qp->device->detach_mcast)
845 return -ENOSYS;
846 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
847 return -EINVAL;
848
849 return qp->device->detach_mcast(qp, gid, lid);
850 }
851 EXPORT_SYMBOL(ib_detach_mcast);
852
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