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IB: Whitespace cleanups
[deliverable/linux.git] / drivers / infiniband / core / verbs.c
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 /* Protection domains */
49
50 struct ib_pd *ib_alloc_pd(struct ib_device *device)
51 {
52 struct ib_pd *pd;
53
54 pd = device->alloc_pd(device, NULL, NULL);
55
56 if (!IS_ERR(pd)) {
57 pd->device = device;
58 pd->uobject = NULL;
59 atomic_set(&pd->usecnt, 0);
60 }
61
62 return pd;
63 }
64 EXPORT_SYMBOL(ib_alloc_pd);
65
66 int ib_dealloc_pd(struct ib_pd *pd)
67 {
68 if (atomic_read(&pd->usecnt))
69 return -EBUSY;
70
71 return pd->device->dealloc_pd(pd);
72 }
73 EXPORT_SYMBOL(ib_dealloc_pd);
74
75 /* Address handles */
76
77 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
78 {
79 struct ib_ah *ah;
80
81 ah = pd->device->create_ah(pd, ah_attr);
82
83 if (!IS_ERR(ah)) {
84 ah->device = pd->device;
85 ah->pd = pd;
86 ah->uobject = NULL;
87 atomic_inc(&pd->usecnt);
88 }
89
90 return ah;
91 }
92 EXPORT_SYMBOL(ib_create_ah);
93
94 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
95 struct ib_grh *grh, u8 port_num)
96 {
97 struct ib_ah_attr ah_attr;
98 u32 flow_class;
99 u16 gid_index;
100 int ret;
101
102 memset(&ah_attr, 0, sizeof ah_attr);
103 ah_attr.dlid = wc->slid;
104 ah_attr.sl = wc->sl;
105 ah_attr.src_path_bits = wc->dlid_path_bits;
106 ah_attr.port_num = port_num;
107
108 if (wc->wc_flags & IB_WC_GRH) {
109 ah_attr.ah_flags = IB_AH_GRH;
110 ah_attr.grh.dgid = grh->sgid;
111
112 ret = ib_find_cached_gid(pd->device, &grh->dgid, &port_num,
113 &gid_index);
114 if (ret)
115 return ERR_PTR(ret);
116
117 ah_attr.grh.sgid_index = (u8) gid_index;
118 flow_class = be32_to_cpu(grh->version_tclass_flow);
119 ah_attr.grh.flow_label = flow_class & 0xFFFFF;
120 ah_attr.grh.traffic_class = (flow_class >> 20) & 0xFF;
121 ah_attr.grh.hop_limit = grh->hop_limit;
122 }
123
124 return ib_create_ah(pd, &ah_attr);
125 }
126 EXPORT_SYMBOL(ib_create_ah_from_wc);
127
128 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
129 {
130 return ah->device->modify_ah ?
131 ah->device->modify_ah(ah, ah_attr) :
132 -ENOSYS;
133 }
134 EXPORT_SYMBOL(ib_modify_ah);
135
136 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
137 {
138 return ah->device->query_ah ?
139 ah->device->query_ah(ah, ah_attr) :
140 -ENOSYS;
141 }
142 EXPORT_SYMBOL(ib_query_ah);
143
144 int ib_destroy_ah(struct ib_ah *ah)
145 {
146 struct ib_pd *pd;
147 int ret;
148
149 pd = ah->pd;
150 ret = ah->device->destroy_ah(ah);
151 if (!ret)
152 atomic_dec(&pd->usecnt);
153
154 return ret;
155 }
156 EXPORT_SYMBOL(ib_destroy_ah);
157
158 /* Shared receive queues */
159
160 struct ib_srq *ib_create_srq(struct ib_pd *pd,
161 struct ib_srq_init_attr *srq_init_attr)
162 {
163 struct ib_srq *srq;
164
165 if (!pd->device->create_srq)
166 return ERR_PTR(-ENOSYS);
167
168 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
169
170 if (!IS_ERR(srq)) {
171 srq->device = pd->device;
172 srq->pd = pd;
173 srq->uobject = NULL;
174 srq->event_handler = srq_init_attr->event_handler;
175 srq->srq_context = srq_init_attr->srq_context;
176 atomic_inc(&pd->usecnt);
177 atomic_set(&srq->usecnt, 0);
178 }
179
180 return srq;
181 }
182 EXPORT_SYMBOL(ib_create_srq);
183
184 int ib_modify_srq(struct ib_srq *srq,
185 struct ib_srq_attr *srq_attr,
186 enum ib_srq_attr_mask srq_attr_mask)
187 {
188 return srq->device->modify_srq(srq, srq_attr, srq_attr_mask);
189 }
190 EXPORT_SYMBOL(ib_modify_srq);
191
192 int ib_query_srq(struct ib_srq *srq,
193 struct ib_srq_attr *srq_attr)
194 {
195 return srq->device->query_srq ?
196 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
197 }
198 EXPORT_SYMBOL(ib_query_srq);
199
200 int ib_destroy_srq(struct ib_srq *srq)
201 {
202 struct ib_pd *pd;
203 int ret;
204
205 if (atomic_read(&srq->usecnt))
206 return -EBUSY;
207
208 pd = srq->pd;
209
210 ret = srq->device->destroy_srq(srq);
211 if (!ret)
212 atomic_dec(&pd->usecnt);
213
214 return ret;
215 }
216 EXPORT_SYMBOL(ib_destroy_srq);
217
218 /* Queue pairs */
219
220 struct ib_qp *ib_create_qp(struct ib_pd *pd,
221 struct ib_qp_init_attr *qp_init_attr)
222 {
223 struct ib_qp *qp;
224
225 qp = pd->device->create_qp(pd, qp_init_attr, NULL);
226
227 if (!IS_ERR(qp)) {
228 qp->device = pd->device;
229 qp->pd = pd;
230 qp->send_cq = qp_init_attr->send_cq;
231 qp->recv_cq = qp_init_attr->recv_cq;
232 qp->srq = qp_init_attr->srq;
233 qp->uobject = NULL;
234 qp->event_handler = qp_init_attr->event_handler;
235 qp->qp_context = qp_init_attr->qp_context;
236 qp->qp_type = qp_init_attr->qp_type;
237 atomic_inc(&pd->usecnt);
238 atomic_inc(&qp_init_attr->send_cq->usecnt);
239 atomic_inc(&qp_init_attr->recv_cq->usecnt);
240 if (qp_init_attr->srq)
241 atomic_inc(&qp_init_attr->srq->usecnt);
242 }
243
244 return qp;
245 }
246 EXPORT_SYMBOL(ib_create_qp);
247
248 static const struct {
249 int valid;
250 enum ib_qp_attr_mask req_param[IB_QPT_RAW_ETY + 1];
251 enum ib_qp_attr_mask opt_param[IB_QPT_RAW_ETY + 1];
252 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
253 [IB_QPS_RESET] = {
254 [IB_QPS_RESET] = { .valid = 1 },
255 [IB_QPS_ERR] = { .valid = 1 },
256 [IB_QPS_INIT] = {
257 .valid = 1,
258 .req_param = {
259 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
260 IB_QP_PORT |
261 IB_QP_QKEY),
262 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
263 IB_QP_PORT |
264 IB_QP_ACCESS_FLAGS),
265 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
266 IB_QP_PORT |
267 IB_QP_ACCESS_FLAGS),
268 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
269 IB_QP_QKEY),
270 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
271 IB_QP_QKEY),
272 }
273 },
274 },
275 [IB_QPS_INIT] = {
276 [IB_QPS_RESET] = { .valid = 1 },
277 [IB_QPS_ERR] = { .valid = 1 },
278 [IB_QPS_INIT] = {
279 .valid = 1,
280 .opt_param = {
281 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
282 IB_QP_PORT |
283 IB_QP_QKEY),
284 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
285 IB_QP_PORT |
286 IB_QP_ACCESS_FLAGS),
287 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
288 IB_QP_PORT |
289 IB_QP_ACCESS_FLAGS),
290 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
291 IB_QP_QKEY),
292 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
293 IB_QP_QKEY),
294 }
295 },
296 [IB_QPS_RTR] = {
297 .valid = 1,
298 .req_param = {
299 [IB_QPT_UC] = (IB_QP_AV |
300 IB_QP_PATH_MTU |
301 IB_QP_DEST_QPN |
302 IB_QP_RQ_PSN),
303 [IB_QPT_RC] = (IB_QP_AV |
304 IB_QP_PATH_MTU |
305 IB_QP_DEST_QPN |
306 IB_QP_RQ_PSN |
307 IB_QP_MAX_DEST_RD_ATOMIC |
308 IB_QP_MIN_RNR_TIMER),
309 },
310 .opt_param = {
311 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
312 IB_QP_QKEY),
313 [IB_QPT_UC] = (IB_QP_ALT_PATH |
314 IB_QP_ACCESS_FLAGS |
315 IB_QP_PKEY_INDEX),
316 [IB_QPT_RC] = (IB_QP_ALT_PATH |
317 IB_QP_ACCESS_FLAGS |
318 IB_QP_PKEY_INDEX),
319 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
320 IB_QP_QKEY),
321 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
322 IB_QP_QKEY),
323 }
324 }
325 },
326 [IB_QPS_RTR] = {
327 [IB_QPS_RESET] = { .valid = 1 },
328 [IB_QPS_ERR] = { .valid = 1 },
329 [IB_QPS_RTS] = {
330 .valid = 1,
331 .req_param = {
332 [IB_QPT_UD] = IB_QP_SQ_PSN,
333 [IB_QPT_UC] = IB_QP_SQ_PSN,
334 [IB_QPT_RC] = (IB_QP_TIMEOUT |
335 IB_QP_RETRY_CNT |
336 IB_QP_RNR_RETRY |
337 IB_QP_SQ_PSN |
338 IB_QP_MAX_QP_RD_ATOMIC),
339 [IB_QPT_SMI] = IB_QP_SQ_PSN,
340 [IB_QPT_GSI] = IB_QP_SQ_PSN,
341 },
342 .opt_param = {
343 [IB_QPT_UD] = (IB_QP_CUR_STATE |
344 IB_QP_QKEY),
345 [IB_QPT_UC] = (IB_QP_CUR_STATE |
346 IB_QP_ALT_PATH |
347 IB_QP_ACCESS_FLAGS |
348 IB_QP_PATH_MIG_STATE),
349 [IB_QPT_RC] = (IB_QP_CUR_STATE |
350 IB_QP_ALT_PATH |
351 IB_QP_ACCESS_FLAGS |
352 IB_QP_MIN_RNR_TIMER |
353 IB_QP_PATH_MIG_STATE),
354 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
355 IB_QP_QKEY),
356 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
357 IB_QP_QKEY),
358 }
359 }
360 },
361 [IB_QPS_RTS] = {
362 [IB_QPS_RESET] = { .valid = 1 },
363 [IB_QPS_ERR] = { .valid = 1 },
364 [IB_QPS_RTS] = {
365 .valid = 1,
366 .opt_param = {
367 [IB_QPT_UD] = (IB_QP_CUR_STATE |
368 IB_QP_QKEY),
369 [IB_QPT_UC] = (IB_QP_ACCESS_FLAGS |
370 IB_QP_ALT_PATH |
371 IB_QP_PATH_MIG_STATE),
372 [IB_QPT_RC] = (IB_QP_ACCESS_FLAGS |
373 IB_QP_ALT_PATH |
374 IB_QP_PATH_MIG_STATE |
375 IB_QP_MIN_RNR_TIMER),
376 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
377 IB_QP_QKEY),
378 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
379 IB_QP_QKEY),
380 }
381 },
382 [IB_QPS_SQD] = {
383 .valid = 1,
384 .opt_param = {
385 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
386 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
387 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
388 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
389 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
390 }
391 },
392 },
393 [IB_QPS_SQD] = {
394 [IB_QPS_RESET] = { .valid = 1 },
395 [IB_QPS_ERR] = { .valid = 1 },
396 [IB_QPS_RTS] = {
397 .valid = 1,
398 .opt_param = {
399 [IB_QPT_UD] = (IB_QP_CUR_STATE |
400 IB_QP_QKEY),
401 [IB_QPT_UC] = (IB_QP_CUR_STATE |
402 IB_QP_ALT_PATH |
403 IB_QP_ACCESS_FLAGS |
404 IB_QP_PATH_MIG_STATE),
405 [IB_QPT_RC] = (IB_QP_CUR_STATE |
406 IB_QP_ALT_PATH |
407 IB_QP_ACCESS_FLAGS |
408 IB_QP_MIN_RNR_TIMER |
409 IB_QP_PATH_MIG_STATE),
410 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
411 IB_QP_QKEY),
412 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
413 IB_QP_QKEY),
414 }
415 },
416 [IB_QPS_SQD] = {
417 .valid = 1,
418 .opt_param = {
419 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
420 IB_QP_QKEY),
421 [IB_QPT_UC] = (IB_QP_AV |
422 IB_QP_CUR_STATE |
423 IB_QP_ALT_PATH |
424 IB_QP_ACCESS_FLAGS |
425 IB_QP_PKEY_INDEX |
426 IB_QP_PATH_MIG_STATE),
427 [IB_QPT_RC] = (IB_QP_PORT |
428 IB_QP_AV |
429 IB_QP_TIMEOUT |
430 IB_QP_RETRY_CNT |
431 IB_QP_RNR_RETRY |
432 IB_QP_MAX_QP_RD_ATOMIC |
433 IB_QP_MAX_DEST_RD_ATOMIC |
434 IB_QP_CUR_STATE |
435 IB_QP_ALT_PATH |
436 IB_QP_ACCESS_FLAGS |
437 IB_QP_PKEY_INDEX |
438 IB_QP_MIN_RNR_TIMER |
439 IB_QP_PATH_MIG_STATE),
440 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
441 IB_QP_QKEY),
442 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
443 IB_QP_QKEY),
444 }
445 }
446 },
447 [IB_QPS_SQE] = {
448 [IB_QPS_RESET] = { .valid = 1 },
449 [IB_QPS_ERR] = { .valid = 1 },
450 [IB_QPS_RTS] = {
451 .valid = 1,
452 .opt_param = {
453 [IB_QPT_UD] = (IB_QP_CUR_STATE |
454 IB_QP_QKEY),
455 [IB_QPT_UC] = (IB_QP_CUR_STATE |
456 IB_QP_ACCESS_FLAGS),
457 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
458 IB_QP_QKEY),
459 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
460 IB_QP_QKEY),
461 }
462 }
463 },
464 [IB_QPS_ERR] = {
465 [IB_QPS_RESET] = { .valid = 1 },
466 [IB_QPS_ERR] = { .valid = 1 }
467 }
468 };
469
470 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
471 enum ib_qp_type type, enum ib_qp_attr_mask mask)
472 {
473 enum ib_qp_attr_mask req_param, opt_param;
474
475 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
476 next_state < 0 || next_state > IB_QPS_ERR)
477 return 0;
478
479 if (mask & IB_QP_CUR_STATE &&
480 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
481 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
482 return 0;
483
484 if (!qp_state_table[cur_state][next_state].valid)
485 return 0;
486
487 req_param = qp_state_table[cur_state][next_state].req_param[type];
488 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
489
490 if ((mask & req_param) != req_param)
491 return 0;
492
493 if (mask & ~(req_param | opt_param | IB_QP_STATE))
494 return 0;
495
496 return 1;
497 }
498 EXPORT_SYMBOL(ib_modify_qp_is_ok);
499
500 int ib_modify_qp(struct ib_qp *qp,
501 struct ib_qp_attr *qp_attr,
502 int qp_attr_mask)
503 {
504 return qp->device->modify_qp(qp, qp_attr, qp_attr_mask);
505 }
506 EXPORT_SYMBOL(ib_modify_qp);
507
508 int ib_query_qp(struct ib_qp *qp,
509 struct ib_qp_attr *qp_attr,
510 int qp_attr_mask,
511 struct ib_qp_init_attr *qp_init_attr)
512 {
513 return qp->device->query_qp ?
514 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) :
515 -ENOSYS;
516 }
517 EXPORT_SYMBOL(ib_query_qp);
518
519 int ib_destroy_qp(struct ib_qp *qp)
520 {
521 struct ib_pd *pd;
522 struct ib_cq *scq, *rcq;
523 struct ib_srq *srq;
524 int ret;
525
526 pd = qp->pd;
527 scq = qp->send_cq;
528 rcq = qp->recv_cq;
529 srq = qp->srq;
530
531 ret = qp->device->destroy_qp(qp);
532 if (!ret) {
533 atomic_dec(&pd->usecnt);
534 atomic_dec(&scq->usecnt);
535 atomic_dec(&rcq->usecnt);
536 if (srq)
537 atomic_dec(&srq->usecnt);
538 }
539
540 return ret;
541 }
542 EXPORT_SYMBOL(ib_destroy_qp);
543
544 /* Completion queues */
545
546 struct ib_cq *ib_create_cq(struct ib_device *device,
547 ib_comp_handler comp_handler,
548 void (*event_handler)(struct ib_event *, void *),
549 void *cq_context, int cqe)
550 {
551 struct ib_cq *cq;
552
553 cq = device->create_cq(device, cqe, NULL, NULL);
554
555 if (!IS_ERR(cq)) {
556 cq->device = device;
557 cq->uobject = NULL;
558 cq->comp_handler = comp_handler;
559 cq->event_handler = event_handler;
560 cq->cq_context = cq_context;
561 atomic_set(&cq->usecnt, 0);
562 }
563
564 return cq;
565 }
566 EXPORT_SYMBOL(ib_create_cq);
567
568 int ib_destroy_cq(struct ib_cq *cq)
569 {
570 if (atomic_read(&cq->usecnt))
571 return -EBUSY;
572
573 return cq->device->destroy_cq(cq);
574 }
575 EXPORT_SYMBOL(ib_destroy_cq);
576
577 int ib_resize_cq(struct ib_cq *cq, int cqe)
578 {
579 return cq->device->resize_cq ?
580 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
581 }
582 EXPORT_SYMBOL(ib_resize_cq);
583
584 /* Memory regions */
585
586 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
587 {
588 struct ib_mr *mr;
589
590 mr = pd->device->get_dma_mr(pd, mr_access_flags);
591
592 if (!IS_ERR(mr)) {
593 mr->device = pd->device;
594 mr->pd = pd;
595 mr->uobject = NULL;
596 atomic_inc(&pd->usecnt);
597 atomic_set(&mr->usecnt, 0);
598 }
599
600 return mr;
601 }
602 EXPORT_SYMBOL(ib_get_dma_mr);
603
604 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
605 struct ib_phys_buf *phys_buf_array,
606 int num_phys_buf,
607 int mr_access_flags,
608 u64 *iova_start)
609 {
610 struct ib_mr *mr;
611
612 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
613 mr_access_flags, iova_start);
614
615 if (!IS_ERR(mr)) {
616 mr->device = pd->device;
617 mr->pd = pd;
618 mr->uobject = NULL;
619 atomic_inc(&pd->usecnt);
620 atomic_set(&mr->usecnt, 0);
621 }
622
623 return mr;
624 }
625 EXPORT_SYMBOL(ib_reg_phys_mr);
626
627 int ib_rereg_phys_mr(struct ib_mr *mr,
628 int mr_rereg_mask,
629 struct ib_pd *pd,
630 struct ib_phys_buf *phys_buf_array,
631 int num_phys_buf,
632 int mr_access_flags,
633 u64 *iova_start)
634 {
635 struct ib_pd *old_pd;
636 int ret;
637
638 if (!mr->device->rereg_phys_mr)
639 return -ENOSYS;
640
641 if (atomic_read(&mr->usecnt))
642 return -EBUSY;
643
644 old_pd = mr->pd;
645
646 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
647 phys_buf_array, num_phys_buf,
648 mr_access_flags, iova_start);
649
650 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
651 atomic_dec(&old_pd->usecnt);
652 atomic_inc(&pd->usecnt);
653 }
654
655 return ret;
656 }
657 EXPORT_SYMBOL(ib_rereg_phys_mr);
658
659 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
660 {
661 return mr->device->query_mr ?
662 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
663 }
664 EXPORT_SYMBOL(ib_query_mr);
665
666 int ib_dereg_mr(struct ib_mr *mr)
667 {
668 struct ib_pd *pd;
669 int ret;
670
671 if (atomic_read(&mr->usecnt))
672 return -EBUSY;
673
674 pd = mr->pd;
675 ret = mr->device->dereg_mr(mr);
676 if (!ret)
677 atomic_dec(&pd->usecnt);
678
679 return ret;
680 }
681 EXPORT_SYMBOL(ib_dereg_mr);
682
683 /* Memory windows */
684
685 struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
686 {
687 struct ib_mw *mw;
688
689 if (!pd->device->alloc_mw)
690 return ERR_PTR(-ENOSYS);
691
692 mw = pd->device->alloc_mw(pd);
693 if (!IS_ERR(mw)) {
694 mw->device = pd->device;
695 mw->pd = pd;
696 mw->uobject = NULL;
697 atomic_inc(&pd->usecnt);
698 }
699
700 return mw;
701 }
702 EXPORT_SYMBOL(ib_alloc_mw);
703
704 int ib_dealloc_mw(struct ib_mw *mw)
705 {
706 struct ib_pd *pd;
707 int ret;
708
709 pd = mw->pd;
710 ret = mw->device->dealloc_mw(mw);
711 if (!ret)
712 atomic_dec(&pd->usecnt);
713
714 return ret;
715 }
716 EXPORT_SYMBOL(ib_dealloc_mw);
717
718 /* "Fast" memory regions */
719
720 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
721 int mr_access_flags,
722 struct ib_fmr_attr *fmr_attr)
723 {
724 struct ib_fmr *fmr;
725
726 if (!pd->device->alloc_fmr)
727 return ERR_PTR(-ENOSYS);
728
729 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
730 if (!IS_ERR(fmr)) {
731 fmr->device = pd->device;
732 fmr->pd = pd;
733 atomic_inc(&pd->usecnt);
734 }
735
736 return fmr;
737 }
738 EXPORT_SYMBOL(ib_alloc_fmr);
739
740 int ib_unmap_fmr(struct list_head *fmr_list)
741 {
742 struct ib_fmr *fmr;
743
744 if (list_empty(fmr_list))
745 return 0;
746
747 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
748 return fmr->device->unmap_fmr(fmr_list);
749 }
750 EXPORT_SYMBOL(ib_unmap_fmr);
751
752 int ib_dealloc_fmr(struct ib_fmr *fmr)
753 {
754 struct ib_pd *pd;
755 int ret;
756
757 pd = fmr->pd;
758 ret = fmr->device->dealloc_fmr(fmr);
759 if (!ret)
760 atomic_dec(&pd->usecnt);
761
762 return ret;
763 }
764 EXPORT_SYMBOL(ib_dealloc_fmr);
765
766 /* Multicast groups */
767
768 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
769 {
770 if (!qp->device->attach_mcast)
771 return -ENOSYS;
772 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
773 return -EINVAL;
774
775 return qp->device->attach_mcast(qp, gid, lid);
776 }
777 EXPORT_SYMBOL(ib_attach_mcast);
778
779 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
780 {
781 if (!qp->device->detach_mcast)
782 return -ENOSYS;
783 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
784 return -EINVAL;
785
786 return qp->device->detach_mcast(qp, gid, lid);
787 }
788 EXPORT_SYMBOL(ib_detach_mcast);
Linux kernel - Deliverables
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