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IB/core: Add support for modify CQ
[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 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 ?
252 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
253 -ENOSYS;
254 }
255 EXPORT_SYMBOL(ib_modify_srq);
256
257 int ib_query_srq(struct ib_srq *srq,
258 struct ib_srq_attr *srq_attr)
259 {
260 return srq->device->query_srq ?
261 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
262 }
263 EXPORT_SYMBOL(ib_query_srq);
264
265 int ib_destroy_srq(struct ib_srq *srq)
266 {
267 struct ib_pd *pd;
268 int ret;
269
270 if (atomic_read(&srq->usecnt))
271 return -EBUSY;
272
273 pd = srq->pd;
274
275 ret = srq->device->destroy_srq(srq);
276 if (!ret)
277 atomic_dec(&pd->usecnt);
278
279 return ret;
280 }
281 EXPORT_SYMBOL(ib_destroy_srq);
282
283 /* Queue pairs */
284
285 struct ib_qp *ib_create_qp(struct ib_pd *pd,
286 struct ib_qp_init_attr *qp_init_attr)
287 {
288 struct ib_qp *qp;
289
290 qp = pd->device->create_qp(pd, qp_init_attr, NULL);
291
292 if (!IS_ERR(qp)) {
293 qp->device = pd->device;
294 qp->pd = pd;
295 qp->send_cq = qp_init_attr->send_cq;
296 qp->recv_cq = qp_init_attr->recv_cq;
297 qp->srq = qp_init_attr->srq;
298 qp->uobject = NULL;
299 qp->event_handler = qp_init_attr->event_handler;
300 qp->qp_context = qp_init_attr->qp_context;
301 qp->qp_type = qp_init_attr->qp_type;
302 atomic_inc(&pd->usecnt);
303 atomic_inc(&qp_init_attr->send_cq->usecnt);
304 atomic_inc(&qp_init_attr->recv_cq->usecnt);
305 if (qp_init_attr->srq)
306 atomic_inc(&qp_init_attr->srq->usecnt);
307 }
308
309 return qp;
310 }
311 EXPORT_SYMBOL(ib_create_qp);
312
313 static const struct {
314 int valid;
315 enum ib_qp_attr_mask req_param[IB_QPT_RAW_ETY + 1];
316 enum ib_qp_attr_mask opt_param[IB_QPT_RAW_ETY + 1];
317 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
318 [IB_QPS_RESET] = {
319 [IB_QPS_RESET] = { .valid = 1 },
320 [IB_QPS_ERR] = { .valid = 1 },
321 [IB_QPS_INIT] = {
322 .valid = 1,
323 .req_param = {
324 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
325 IB_QP_PORT |
326 IB_QP_QKEY),
327 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
328 IB_QP_PORT |
329 IB_QP_ACCESS_FLAGS),
330 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
331 IB_QP_PORT |
332 IB_QP_ACCESS_FLAGS),
333 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
334 IB_QP_QKEY),
335 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
336 IB_QP_QKEY),
337 }
338 },
339 },
340 [IB_QPS_INIT] = {
341 [IB_QPS_RESET] = { .valid = 1 },
342 [IB_QPS_ERR] = { .valid = 1 },
343 [IB_QPS_INIT] = {
344 .valid = 1,
345 .opt_param = {
346 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
347 IB_QP_PORT |
348 IB_QP_QKEY),
349 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
350 IB_QP_PORT |
351 IB_QP_ACCESS_FLAGS),
352 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
353 IB_QP_PORT |
354 IB_QP_ACCESS_FLAGS),
355 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
356 IB_QP_QKEY),
357 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
358 IB_QP_QKEY),
359 }
360 },
361 [IB_QPS_RTR] = {
362 .valid = 1,
363 .req_param = {
364 [IB_QPT_UC] = (IB_QP_AV |
365 IB_QP_PATH_MTU |
366 IB_QP_DEST_QPN |
367 IB_QP_RQ_PSN),
368 [IB_QPT_RC] = (IB_QP_AV |
369 IB_QP_PATH_MTU |
370 IB_QP_DEST_QPN |
371 IB_QP_RQ_PSN |
372 IB_QP_MAX_DEST_RD_ATOMIC |
373 IB_QP_MIN_RNR_TIMER),
374 },
375 .opt_param = {
376 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
377 IB_QP_QKEY),
378 [IB_QPT_UC] = (IB_QP_ALT_PATH |
379 IB_QP_ACCESS_FLAGS |
380 IB_QP_PKEY_INDEX),
381 [IB_QPT_RC] = (IB_QP_ALT_PATH |
382 IB_QP_ACCESS_FLAGS |
383 IB_QP_PKEY_INDEX),
384 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
385 IB_QP_QKEY),
386 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
387 IB_QP_QKEY),
388 }
389 }
390 },
391 [IB_QPS_RTR] = {
392 [IB_QPS_RESET] = { .valid = 1 },
393 [IB_QPS_ERR] = { .valid = 1 },
394 [IB_QPS_RTS] = {
395 .valid = 1,
396 .req_param = {
397 [IB_QPT_UD] = IB_QP_SQ_PSN,
398 [IB_QPT_UC] = IB_QP_SQ_PSN,
399 [IB_QPT_RC] = (IB_QP_TIMEOUT |
400 IB_QP_RETRY_CNT |
401 IB_QP_RNR_RETRY |
402 IB_QP_SQ_PSN |
403 IB_QP_MAX_QP_RD_ATOMIC),
404 [IB_QPT_SMI] = IB_QP_SQ_PSN,
405 [IB_QPT_GSI] = IB_QP_SQ_PSN,
406 },
407 .opt_param = {
408 [IB_QPT_UD] = (IB_QP_CUR_STATE |
409 IB_QP_QKEY),
410 [IB_QPT_UC] = (IB_QP_CUR_STATE |
411 IB_QP_ALT_PATH |
412 IB_QP_ACCESS_FLAGS |
413 IB_QP_PATH_MIG_STATE),
414 [IB_QPT_RC] = (IB_QP_CUR_STATE |
415 IB_QP_ALT_PATH |
416 IB_QP_ACCESS_FLAGS |
417 IB_QP_MIN_RNR_TIMER |
418 IB_QP_PATH_MIG_STATE),
419 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
420 IB_QP_QKEY),
421 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
422 IB_QP_QKEY),
423 }
424 }
425 },
426 [IB_QPS_RTS] = {
427 [IB_QPS_RESET] = { .valid = 1 },
428 [IB_QPS_ERR] = { .valid = 1 },
429 [IB_QPS_RTS] = {
430 .valid = 1,
431 .opt_param = {
432 [IB_QPT_UD] = (IB_QP_CUR_STATE |
433 IB_QP_QKEY),
434 [IB_QPT_UC] = (IB_QP_CUR_STATE |
435 IB_QP_ACCESS_FLAGS |
436 IB_QP_ALT_PATH |
437 IB_QP_PATH_MIG_STATE),
438 [IB_QPT_RC] = (IB_QP_CUR_STATE |
439 IB_QP_ACCESS_FLAGS |
440 IB_QP_ALT_PATH |
441 IB_QP_PATH_MIG_STATE |
442 IB_QP_MIN_RNR_TIMER),
443 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
444 IB_QP_QKEY),
445 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
446 IB_QP_QKEY),
447 }
448 },
449 [IB_QPS_SQD] = {
450 .valid = 1,
451 .opt_param = {
452 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
453 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
454 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
455 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
456 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
457 }
458 },
459 },
460 [IB_QPS_SQD] = {
461 [IB_QPS_RESET] = { .valid = 1 },
462 [IB_QPS_ERR] = { .valid = 1 },
463 [IB_QPS_RTS] = {
464 .valid = 1,
465 .opt_param = {
466 [IB_QPT_UD] = (IB_QP_CUR_STATE |
467 IB_QP_QKEY),
468 [IB_QPT_UC] = (IB_QP_CUR_STATE |
469 IB_QP_ALT_PATH |
470 IB_QP_ACCESS_FLAGS |
471 IB_QP_PATH_MIG_STATE),
472 [IB_QPT_RC] = (IB_QP_CUR_STATE |
473 IB_QP_ALT_PATH |
474 IB_QP_ACCESS_FLAGS |
475 IB_QP_MIN_RNR_TIMER |
476 IB_QP_PATH_MIG_STATE),
477 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
478 IB_QP_QKEY),
479 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
480 IB_QP_QKEY),
481 }
482 },
483 [IB_QPS_SQD] = {
484 .valid = 1,
485 .opt_param = {
486 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
487 IB_QP_QKEY),
488 [IB_QPT_UC] = (IB_QP_AV |
489 IB_QP_ALT_PATH |
490 IB_QP_ACCESS_FLAGS |
491 IB_QP_PKEY_INDEX |
492 IB_QP_PATH_MIG_STATE),
493 [IB_QPT_RC] = (IB_QP_PORT |
494 IB_QP_AV |
495 IB_QP_TIMEOUT |
496 IB_QP_RETRY_CNT |
497 IB_QP_RNR_RETRY |
498 IB_QP_MAX_QP_RD_ATOMIC |
499 IB_QP_MAX_DEST_RD_ATOMIC |
500 IB_QP_ALT_PATH |
501 IB_QP_ACCESS_FLAGS |
502 IB_QP_PKEY_INDEX |
503 IB_QP_MIN_RNR_TIMER |
504 IB_QP_PATH_MIG_STATE),
505 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
506 IB_QP_QKEY),
507 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
508 IB_QP_QKEY),
509 }
510 }
511 },
512 [IB_QPS_SQE] = {
513 [IB_QPS_RESET] = { .valid = 1 },
514 [IB_QPS_ERR] = { .valid = 1 },
515 [IB_QPS_RTS] = {
516 .valid = 1,
517 .opt_param = {
518 [IB_QPT_UD] = (IB_QP_CUR_STATE |
519 IB_QP_QKEY),
520 [IB_QPT_UC] = (IB_QP_CUR_STATE |
521 IB_QP_ACCESS_FLAGS),
522 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
523 IB_QP_QKEY),
524 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
525 IB_QP_QKEY),
526 }
527 }
528 },
529 [IB_QPS_ERR] = {
530 [IB_QPS_RESET] = { .valid = 1 },
531 [IB_QPS_ERR] = { .valid = 1 }
532 }
533 };
534
535 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
536 enum ib_qp_type type, enum ib_qp_attr_mask mask)
537 {
538 enum ib_qp_attr_mask req_param, opt_param;
539
540 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
541 next_state < 0 || next_state > IB_QPS_ERR)
542 return 0;
543
544 if (mask & IB_QP_CUR_STATE &&
545 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
546 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
547 return 0;
548
549 if (!qp_state_table[cur_state][next_state].valid)
550 return 0;
551
552 req_param = qp_state_table[cur_state][next_state].req_param[type];
553 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
554
555 if ((mask & req_param) != req_param)
556 return 0;
557
558 if (mask & ~(req_param | opt_param | IB_QP_STATE))
559 return 0;
560
561 return 1;
562 }
563 EXPORT_SYMBOL(ib_modify_qp_is_ok);
564
565 int ib_modify_qp(struct ib_qp *qp,
566 struct ib_qp_attr *qp_attr,
567 int qp_attr_mask)
568 {
569 return qp->device->modify_qp(qp, qp_attr, qp_attr_mask, NULL);
570 }
571 EXPORT_SYMBOL(ib_modify_qp);
572
573 int ib_query_qp(struct ib_qp *qp,
574 struct ib_qp_attr *qp_attr,
575 int qp_attr_mask,
576 struct ib_qp_init_attr *qp_init_attr)
577 {
578 return qp->device->query_qp ?
579 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) :
580 -ENOSYS;
581 }
582 EXPORT_SYMBOL(ib_query_qp);
583
584 int ib_destroy_qp(struct ib_qp *qp)
585 {
586 struct ib_pd *pd;
587 struct ib_cq *scq, *rcq;
588 struct ib_srq *srq;
589 int ret;
590
591 pd = qp->pd;
592 scq = qp->send_cq;
593 rcq = qp->recv_cq;
594 srq = qp->srq;
595
596 ret = qp->device->destroy_qp(qp);
597 if (!ret) {
598 atomic_dec(&pd->usecnt);
599 atomic_dec(&scq->usecnt);
600 atomic_dec(&rcq->usecnt);
601 if (srq)
602 atomic_dec(&srq->usecnt);
603 }
604
605 return ret;
606 }
607 EXPORT_SYMBOL(ib_destroy_qp);
608
609 /* Completion queues */
610
611 struct ib_cq *ib_create_cq(struct ib_device *device,
612 ib_comp_handler comp_handler,
613 void (*event_handler)(struct ib_event *, void *),
614 void *cq_context, int cqe, int comp_vector)
615 {
616 struct ib_cq *cq;
617
618 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
619
620 if (!IS_ERR(cq)) {
621 cq->device = device;
622 cq->uobject = NULL;
623 cq->comp_handler = comp_handler;
624 cq->event_handler = event_handler;
625 cq->cq_context = cq_context;
626 atomic_set(&cq->usecnt, 0);
627 }
628
629 return cq;
630 }
631 EXPORT_SYMBOL(ib_create_cq);
632
633 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
634 {
635 return cq->device->modify_cq ?
636 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
637 }
638 EXPORT_SYMBOL(ib_modify_cq);
639
640 int ib_destroy_cq(struct ib_cq *cq)
641 {
642 if (atomic_read(&cq->usecnt))
643 return -EBUSY;
644
645 return cq->device->destroy_cq(cq);
646 }
647 EXPORT_SYMBOL(ib_destroy_cq);
648
649 int ib_resize_cq(struct ib_cq *cq, int cqe)
650 {
651 return cq->device->resize_cq ?
652 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
653 }
654 EXPORT_SYMBOL(ib_resize_cq);
655
656 /* Memory regions */
657
658 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
659 {
660 struct ib_mr *mr;
661
662 mr = pd->device->get_dma_mr(pd, mr_access_flags);
663
664 if (!IS_ERR(mr)) {
665 mr->device = pd->device;
666 mr->pd = pd;
667 mr->uobject = NULL;
668 atomic_inc(&pd->usecnt);
669 atomic_set(&mr->usecnt, 0);
670 }
671
672 return mr;
673 }
674 EXPORT_SYMBOL(ib_get_dma_mr);
675
676 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
677 struct ib_phys_buf *phys_buf_array,
678 int num_phys_buf,
679 int mr_access_flags,
680 u64 *iova_start)
681 {
682 struct ib_mr *mr;
683
684 if (!pd->device->reg_phys_mr)
685 return ERR_PTR(-ENOSYS);
686
687 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
688 mr_access_flags, iova_start);
689
690 if (!IS_ERR(mr)) {
691 mr->device = pd->device;
692 mr->pd = pd;
693 mr->uobject = NULL;
694 atomic_inc(&pd->usecnt);
695 atomic_set(&mr->usecnt, 0);
696 }
697
698 return mr;
699 }
700 EXPORT_SYMBOL(ib_reg_phys_mr);
701
702 int ib_rereg_phys_mr(struct ib_mr *mr,
703 int mr_rereg_mask,
704 struct ib_pd *pd,
705 struct ib_phys_buf *phys_buf_array,
706 int num_phys_buf,
707 int mr_access_flags,
708 u64 *iova_start)
709 {
710 struct ib_pd *old_pd;
711 int ret;
712
713 if (!mr->device->rereg_phys_mr)
714 return -ENOSYS;
715
716 if (atomic_read(&mr->usecnt))
717 return -EBUSY;
718
719 old_pd = mr->pd;
720
721 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
722 phys_buf_array, num_phys_buf,
723 mr_access_flags, iova_start);
724
725 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
726 atomic_dec(&old_pd->usecnt);
727 atomic_inc(&pd->usecnt);
728 }
729
730 return ret;
731 }
732 EXPORT_SYMBOL(ib_rereg_phys_mr);
733
734 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
735 {
736 return mr->device->query_mr ?
737 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
738 }
739 EXPORT_SYMBOL(ib_query_mr);
740
741 int ib_dereg_mr(struct ib_mr *mr)
742 {
743 struct ib_pd *pd;
744 int ret;
745
746 if (atomic_read(&mr->usecnt))
747 return -EBUSY;
748
749 pd = mr->pd;
750 ret = mr->device->dereg_mr(mr);
751 if (!ret)
752 atomic_dec(&pd->usecnt);
753
754 return ret;
755 }
756 EXPORT_SYMBOL(ib_dereg_mr);
757
758 /* Memory windows */
759
760 struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
761 {
762 struct ib_mw *mw;
763
764 if (!pd->device->alloc_mw)
765 return ERR_PTR(-ENOSYS);
766
767 mw = pd->device->alloc_mw(pd);
768 if (!IS_ERR(mw)) {
769 mw->device = pd->device;
770 mw->pd = pd;
771 mw->uobject = NULL;
772 atomic_inc(&pd->usecnt);
773 }
774
775 return mw;
776 }
777 EXPORT_SYMBOL(ib_alloc_mw);
778
779 int ib_dealloc_mw(struct ib_mw *mw)
780 {
781 struct ib_pd *pd;
782 int ret;
783
784 pd = mw->pd;
785 ret = mw->device->dealloc_mw(mw);
786 if (!ret)
787 atomic_dec(&pd->usecnt);
788
789 return ret;
790 }
791 EXPORT_SYMBOL(ib_dealloc_mw);
792
793 /* "Fast" memory regions */
794
795 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
796 int mr_access_flags,
797 struct ib_fmr_attr *fmr_attr)
798 {
799 struct ib_fmr *fmr;
800
801 if (!pd->device->alloc_fmr)
802 return ERR_PTR(-ENOSYS);
803
804 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
805 if (!IS_ERR(fmr)) {
806 fmr->device = pd->device;
807 fmr->pd = pd;
808 atomic_inc(&pd->usecnt);
809 }
810
811 return fmr;
812 }
813 EXPORT_SYMBOL(ib_alloc_fmr);
814
815 int ib_unmap_fmr(struct list_head *fmr_list)
816 {
817 struct ib_fmr *fmr;
818
819 if (list_empty(fmr_list))
820 return 0;
821
822 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
823 return fmr->device->unmap_fmr(fmr_list);
824 }
825 EXPORT_SYMBOL(ib_unmap_fmr);
826
827 int ib_dealloc_fmr(struct ib_fmr *fmr)
828 {
829 struct ib_pd *pd;
830 int ret;
831
832 pd = fmr->pd;
833 ret = fmr->device->dealloc_fmr(fmr);
834 if (!ret)
835 atomic_dec(&pd->usecnt);
836
837 return ret;
838 }
839 EXPORT_SYMBOL(ib_dealloc_fmr);
840
841 /* Multicast groups */
842
843 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
844 {
845 if (!qp->device->attach_mcast)
846 return -ENOSYS;
847 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
848 return -EINVAL;
849
850 return qp->device->attach_mcast(qp, gid, lid);
851 }
852 EXPORT_SYMBOL(ib_attach_mcast);
853
854 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
855 {
856 if (!qp->device->detach_mcast)
857 return -ENOSYS;
858 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
859 return -EINVAL;
860
861 return qp->device->detach_mcast(qp, gid, lid);
862 }
863 EXPORT_SYMBOL(ib_detach_mcast);
Linux kernel - Deliverables
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