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IB: simplify static rate encoding
[linux-2.6/verdex.git] / drivers / infiniband / core / verbs.c
blobb78e7dc6933072c21f4bd943960a9b79f6e3393f
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 /* Protection domains */
83
84 struct ib_pd *ib_alloc_pd(struct ib_device *device)
85 {
86 struct ib_pd *pd;
87
88 pd = device->alloc_pd(device, NULL, NULL);
89
90 if (!IS_ERR(pd)) {
91 pd->device = device;
92 pd->uobject = NULL;
93 atomic_set(&pd->usecnt, 0);
94 }
95
96 return pd;
97 }
98 EXPORT_SYMBOL(ib_alloc_pd);
99
100 int ib_dealloc_pd(struct ib_pd *pd)
101 {
102 if (atomic_read(&pd->usecnt))
103 return -EBUSY;
104
105 return pd->device->dealloc_pd(pd);
106 }
107 EXPORT_SYMBOL(ib_dealloc_pd);
108
109 /* Address handles */
110
111 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
112 {
113 struct ib_ah *ah;
114
115 ah = pd->device->create_ah(pd, ah_attr);
116
117 if (!IS_ERR(ah)) {
118 ah->device = pd->device;
119 ah->pd = pd;
120 ah->uobject = NULL;
121 atomic_inc(&pd->usecnt);
122 }
123
124 return ah;
125 }
126 EXPORT_SYMBOL(ib_create_ah);
127
128 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
129 struct ib_grh *grh, u8 port_num)
130 {
131 struct ib_ah_attr ah_attr;
132 u32 flow_class;
133 u16 gid_index;
134 int ret;
135
136 memset(&ah_attr, 0, sizeof ah_attr);
137 ah_attr.dlid = wc->slid;
138 ah_attr.sl = wc->sl;
139 ah_attr.src_path_bits = wc->dlid_path_bits;
140 ah_attr.port_num = port_num;
141
142 if (wc->wc_flags & IB_WC_GRH) {
143 ah_attr.ah_flags = IB_AH_GRH;
144 ah_attr.grh.dgid = grh->sgid;
145
146 ret = ib_find_cached_gid(pd->device, &grh->dgid, &port_num,
147 &gid_index);
148 if (ret)
149 return ERR_PTR(ret);
150
151 ah_attr.grh.sgid_index = (u8) gid_index;
152 flow_class = be32_to_cpu(grh->version_tclass_flow);
153 ah_attr.grh.flow_label = flow_class & 0xFFFFF;
154 ah_attr.grh.traffic_class = (flow_class >> 20) & 0xFF;
155 ah_attr.grh.hop_limit = grh->hop_limit;
156 }
157
158 return ib_create_ah(pd, &ah_attr);
159 }
160 EXPORT_SYMBOL(ib_create_ah_from_wc);
161
162 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
163 {
164 return ah->device->modify_ah ?
165 ah->device->modify_ah(ah, ah_attr) :
166 -ENOSYS;
167 }
168 EXPORT_SYMBOL(ib_modify_ah);
169
170 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
171 {
172 return ah->device->query_ah ?
173 ah->device->query_ah(ah, ah_attr) :
174 -ENOSYS;
175 }
176 EXPORT_SYMBOL(ib_query_ah);
177
178 int ib_destroy_ah(struct ib_ah *ah)
179 {
180 struct ib_pd *pd;
181 int ret;
182
183 pd = ah->pd;
184 ret = ah->device->destroy_ah(ah);
185 if (!ret)
186 atomic_dec(&pd->usecnt);
187
188 return ret;
189 }
190 EXPORT_SYMBOL(ib_destroy_ah);
191
192 /* Shared receive queues */
193
194 struct ib_srq *ib_create_srq(struct ib_pd *pd,
195 struct ib_srq_init_attr *srq_init_attr)
196 {
197 struct ib_srq *srq;
198
199 if (!pd->device->create_srq)
200 return ERR_PTR(-ENOSYS);
201
202 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
203
204 if (!IS_ERR(srq)) {
205 srq->device = pd->device;
206 srq->pd = pd;
207 srq->uobject = NULL;
208 srq->event_handler = srq_init_attr->event_handler;
209 srq->srq_context = srq_init_attr->srq_context;
210 atomic_inc(&pd->usecnt);
211 atomic_set(&srq->usecnt, 0);
212 }
213
214 return srq;
215 }
216 EXPORT_SYMBOL(ib_create_srq);
217
218 int ib_modify_srq(struct ib_srq *srq,
219 struct ib_srq_attr *srq_attr,
220 enum ib_srq_attr_mask srq_attr_mask)
221 {
222 return srq->device->modify_srq(srq, srq_attr, srq_attr_mask);
223 }
224 EXPORT_SYMBOL(ib_modify_srq);
225
226 int ib_query_srq(struct ib_srq *srq,
227 struct ib_srq_attr *srq_attr)
228 {
229 return srq->device->query_srq ?
230 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
231 }
232 EXPORT_SYMBOL(ib_query_srq);
233
234 int ib_destroy_srq(struct ib_srq *srq)
235 {
236 struct ib_pd *pd;
237 int ret;
238
239 if (atomic_read(&srq->usecnt))
240 return -EBUSY;
241
242 pd = srq->pd;
243
244 ret = srq->device->destroy_srq(srq);
245 if (!ret)
246 atomic_dec(&pd->usecnt);
247
248 return ret;
249 }
250 EXPORT_SYMBOL(ib_destroy_srq);
251
252 /* Queue pairs */
253
254 struct ib_qp *ib_create_qp(struct ib_pd *pd,
255 struct ib_qp_init_attr *qp_init_attr)
256 {
257 struct ib_qp *qp;
258
259 qp = pd->device->create_qp(pd, qp_init_attr, NULL);
260
261 if (!IS_ERR(qp)) {
262 qp->device = pd->device;
263 qp->pd = pd;
264 qp->send_cq = qp_init_attr->send_cq;
265 qp->recv_cq = qp_init_attr->recv_cq;
266 qp->srq = qp_init_attr->srq;
267 qp->uobject = NULL;
268 qp->event_handler = qp_init_attr->event_handler;
269 qp->qp_context = qp_init_attr->qp_context;
270 qp->qp_type = qp_init_attr->qp_type;
271 atomic_inc(&pd->usecnt);
272 atomic_inc(&qp_init_attr->send_cq->usecnt);
273 atomic_inc(&qp_init_attr->recv_cq->usecnt);
274 if (qp_init_attr->srq)
275 atomic_inc(&qp_init_attr->srq->usecnt);
276 }
277
278 return qp;
279 }
280 EXPORT_SYMBOL(ib_create_qp);
281
282 static const struct {
283 int valid;
284 enum ib_qp_attr_mask req_param[IB_QPT_RAW_ETY + 1];
285 enum ib_qp_attr_mask opt_param[IB_QPT_RAW_ETY + 1];
286 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
287 [IB_QPS_RESET] = {
288 [IB_QPS_RESET] = { .valid = 1 },
289 [IB_QPS_ERR] = { .valid = 1 },
290 [IB_QPS_INIT] = {
291 .valid = 1,
292 .req_param = {
293 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
294 IB_QP_PORT |
295 IB_QP_QKEY),
296 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
297 IB_QP_PORT |
298 IB_QP_ACCESS_FLAGS),
299 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
300 IB_QP_PORT |
301 IB_QP_ACCESS_FLAGS),
302 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
303 IB_QP_QKEY),
304 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
305 IB_QP_QKEY),
306 }
307 },
308 },
309 [IB_QPS_INIT] = {
310 [IB_QPS_RESET] = { .valid = 1 },
311 [IB_QPS_ERR] = { .valid = 1 },
312 [IB_QPS_INIT] = {
313 .valid = 1,
314 .opt_param = {
315 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
316 IB_QP_PORT |
317 IB_QP_QKEY),
318 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
319 IB_QP_PORT |
320 IB_QP_ACCESS_FLAGS),
321 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
322 IB_QP_PORT |
323 IB_QP_ACCESS_FLAGS),
324 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
325 IB_QP_QKEY),
326 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
327 IB_QP_QKEY),
328 }
329 },
330 [IB_QPS_RTR] = {
331 .valid = 1,
332 .req_param = {
333 [IB_QPT_UC] = (IB_QP_AV |
334 IB_QP_PATH_MTU |
335 IB_QP_DEST_QPN |
336 IB_QP_RQ_PSN),
337 [IB_QPT_RC] = (IB_QP_AV |
338 IB_QP_PATH_MTU |
339 IB_QP_DEST_QPN |
340 IB_QP_RQ_PSN |
341 IB_QP_MAX_DEST_RD_ATOMIC |
342 IB_QP_MIN_RNR_TIMER),
343 },
344 .opt_param = {
345 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
346 IB_QP_QKEY),
347 [IB_QPT_UC] = (IB_QP_ALT_PATH |
348 IB_QP_ACCESS_FLAGS |
349 IB_QP_PKEY_INDEX),
350 [IB_QPT_RC] = (IB_QP_ALT_PATH |
351 IB_QP_ACCESS_FLAGS |
352 IB_QP_PKEY_INDEX),
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 },
360 [IB_QPS_RTR] = {
361 [IB_QPS_RESET] = { .valid = 1 },
362 [IB_QPS_ERR] = { .valid = 1 },
363 [IB_QPS_RTS] = {
364 .valid = 1,
365 .req_param = {
366 [IB_QPT_UD] = IB_QP_SQ_PSN,
367 [IB_QPT_UC] = IB_QP_SQ_PSN,
368 [IB_QPT_RC] = (IB_QP_TIMEOUT |
369 IB_QP_RETRY_CNT |
370 IB_QP_RNR_RETRY |
371 IB_QP_SQ_PSN |
372 IB_QP_MAX_QP_RD_ATOMIC),
373 [IB_QPT_SMI] = IB_QP_SQ_PSN,
374 [IB_QPT_GSI] = IB_QP_SQ_PSN,
375 },
376 .opt_param = {
377 [IB_QPT_UD] = (IB_QP_CUR_STATE |
378 IB_QP_QKEY),
379 [IB_QPT_UC] = (IB_QP_CUR_STATE |
380 IB_QP_ALT_PATH |
381 IB_QP_ACCESS_FLAGS |
382 IB_QP_PATH_MIG_STATE),
383 [IB_QPT_RC] = (IB_QP_CUR_STATE |
384 IB_QP_ALT_PATH |
385 IB_QP_ACCESS_FLAGS |
386 IB_QP_MIN_RNR_TIMER |
387 IB_QP_PATH_MIG_STATE),
388 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
389 IB_QP_QKEY),
390 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
391 IB_QP_QKEY),
392 }
393 }
394 },
395 [IB_QPS_RTS] = {
396 [IB_QPS_RESET] = { .valid = 1 },
397 [IB_QPS_ERR] = { .valid = 1 },
398 [IB_QPS_RTS] = {
399 .valid = 1,
400 .opt_param = {
401 [IB_QPT_UD] = (IB_QP_CUR_STATE |
402 IB_QP_QKEY),
403 [IB_QPT_UC] = (IB_QP_CUR_STATE |
404 IB_QP_ACCESS_FLAGS |
405 IB_QP_ALT_PATH |
406 IB_QP_PATH_MIG_STATE),
407 [IB_QPT_RC] = (IB_QP_CUR_STATE |
408 IB_QP_ACCESS_FLAGS |
409 IB_QP_ALT_PATH |
410 IB_QP_PATH_MIG_STATE |
411 IB_QP_MIN_RNR_TIMER),
412 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
413 IB_QP_QKEY),
414 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
415 IB_QP_QKEY),
416 }
417 },
418 [IB_QPS_SQD] = {
419 .valid = 1,
420 .opt_param = {
421 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
422 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
423 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
424 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
425 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
426 }
427 },
428 },
429 [IB_QPS_SQD] = {
430 [IB_QPS_RESET] = { .valid = 1 },
431 [IB_QPS_ERR] = { .valid = 1 },
432 [IB_QPS_RTS] = {
433 .valid = 1,
434 .opt_param = {
435 [IB_QPT_UD] = (IB_QP_CUR_STATE |
436 IB_QP_QKEY),
437 [IB_QPT_UC] = (IB_QP_CUR_STATE |
438 IB_QP_ALT_PATH |
439 IB_QP_ACCESS_FLAGS |
440 IB_QP_PATH_MIG_STATE),
441 [IB_QPT_RC] = (IB_QP_CUR_STATE |
442 IB_QP_ALT_PATH |
443 IB_QP_ACCESS_FLAGS |
444 IB_QP_MIN_RNR_TIMER |
445 IB_QP_PATH_MIG_STATE),
446 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
447 IB_QP_QKEY),
448 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
449 IB_QP_QKEY),
450 }
451 },
452 [IB_QPS_SQD] = {
453 .valid = 1,
454 .opt_param = {
455 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
456 IB_QP_QKEY),
457 [IB_QPT_UC] = (IB_QP_AV |
458 IB_QP_ALT_PATH |
459 IB_QP_ACCESS_FLAGS |
460 IB_QP_PKEY_INDEX |
461 IB_QP_PATH_MIG_STATE),
462 [IB_QPT_RC] = (IB_QP_PORT |
463 IB_QP_AV |
464 IB_QP_TIMEOUT |
465 IB_QP_RETRY_CNT |
466 IB_QP_RNR_RETRY |
467 IB_QP_MAX_QP_RD_ATOMIC |
468 IB_QP_MAX_DEST_RD_ATOMIC |
469 IB_QP_ALT_PATH |
470 IB_QP_ACCESS_FLAGS |
471 IB_QP_PKEY_INDEX |
472 IB_QP_MIN_RNR_TIMER |
473 IB_QP_PATH_MIG_STATE),
474 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
475 IB_QP_QKEY),
476 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
477 IB_QP_QKEY),
478 }
479 }
480 },
481 [IB_QPS_SQE] = {
482 [IB_QPS_RESET] = { .valid = 1 },
483 [IB_QPS_ERR] = { .valid = 1 },
484 [IB_QPS_RTS] = {
485 .valid = 1,
486 .opt_param = {
487 [IB_QPT_UD] = (IB_QP_CUR_STATE |
488 IB_QP_QKEY),
489 [IB_QPT_UC] = (IB_QP_CUR_STATE |
490 IB_QP_ACCESS_FLAGS),
491 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
492 IB_QP_QKEY),
493 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
494 IB_QP_QKEY),
495 }
496 }
497 },
498 [IB_QPS_ERR] = {
499 [IB_QPS_RESET] = { .valid = 1 },
500 [IB_QPS_ERR] = { .valid = 1 }
501 }
502 };
503
504 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
505 enum ib_qp_type type, enum ib_qp_attr_mask mask)
506 {
507 enum ib_qp_attr_mask req_param, opt_param;
508
509 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
510 next_state < 0 || next_state > IB_QPS_ERR)
511 return 0;
512
513 if (mask & IB_QP_CUR_STATE &&
514 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
515 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
516 return 0;
517
518 if (!qp_state_table[cur_state][next_state].valid)
519 return 0;
520
521 req_param = qp_state_table[cur_state][next_state].req_param[type];
522 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
523
524 if ((mask & req_param) != req_param)
525 return 0;
526
527 if (mask & ~(req_param | opt_param | IB_QP_STATE))
528 return 0;
529
530 return 1;
531 }
532 EXPORT_SYMBOL(ib_modify_qp_is_ok);
533
534 int ib_modify_qp(struct ib_qp *qp,
535 struct ib_qp_attr *qp_attr,
536 int qp_attr_mask)
537 {
538 return qp->device->modify_qp(qp, qp_attr, qp_attr_mask);
539 }
540 EXPORT_SYMBOL(ib_modify_qp);
541
542 int ib_query_qp(struct ib_qp *qp,
543 struct ib_qp_attr *qp_attr,
544 int qp_attr_mask,
545 struct ib_qp_init_attr *qp_init_attr)
546 {
547 return qp->device->query_qp ?
548 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) :
549 -ENOSYS;
550 }
551 EXPORT_SYMBOL(ib_query_qp);
552
553 int ib_destroy_qp(struct ib_qp *qp)
554 {
555 struct ib_pd *pd;
556 struct ib_cq *scq, *rcq;
557 struct ib_srq *srq;
558 int ret;
559
560 pd = qp->pd;
561 scq = qp->send_cq;
562 rcq = qp->recv_cq;
563 srq = qp->srq;
564
565 ret = qp->device->destroy_qp(qp);
566 if (!ret) {
567 atomic_dec(&pd->usecnt);
568 atomic_dec(&scq->usecnt);
569 atomic_dec(&rcq->usecnt);
570 if (srq)
571 atomic_dec(&srq->usecnt);
572 }
573
574 return ret;
575 }
576 EXPORT_SYMBOL(ib_destroy_qp);
577
578 /* Completion queues */
579
580 struct ib_cq *ib_create_cq(struct ib_device *device,
581 ib_comp_handler comp_handler,
582 void (*event_handler)(struct ib_event *, void *),
583 void *cq_context, int cqe)
584 {
585 struct ib_cq *cq;
586
587 cq = device->create_cq(device, cqe, NULL, NULL);
588
589 if (!IS_ERR(cq)) {
590 cq->device = device;
591 cq->uobject = NULL;
592 cq->comp_handler = comp_handler;
593 cq->event_handler = event_handler;
594 cq->cq_context = cq_context;
595 atomic_set(&cq->usecnt, 0);
596 }
597
598 return cq;
599 }
600 EXPORT_SYMBOL(ib_create_cq);
601
602 int ib_destroy_cq(struct ib_cq *cq)
603 {
604 if (atomic_read(&cq->usecnt))
605 return -EBUSY;
606
607 return cq->device->destroy_cq(cq);
608 }
609 EXPORT_SYMBOL(ib_destroy_cq);
610
611 int ib_resize_cq(struct ib_cq *cq, int cqe)
612 {
613 return cq->device->resize_cq ?
614 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
615 }
616 EXPORT_SYMBOL(ib_resize_cq);
617
618 /* Memory regions */
619
620 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
621 {
622 struct ib_mr *mr;
623
624 mr = pd->device->get_dma_mr(pd, mr_access_flags);
625
626 if (!IS_ERR(mr)) {
627 mr->device = pd->device;
628 mr->pd = pd;
629 mr->uobject = NULL;
630 atomic_inc(&pd->usecnt);
631 atomic_set(&mr->usecnt, 0);
632 }
633
634 return mr;
635 }
636 EXPORT_SYMBOL(ib_get_dma_mr);
637
638 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
639 struct ib_phys_buf *phys_buf_array,
640 int num_phys_buf,
641 int mr_access_flags,
642 u64 *iova_start)
643 {
644 struct ib_mr *mr;
645
646 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
647 mr_access_flags, iova_start);
648
649 if (!IS_ERR(mr)) {
650 mr->device = pd->device;
651 mr->pd = pd;
652 mr->uobject = NULL;
653 atomic_inc(&pd->usecnt);
654 atomic_set(&mr->usecnt, 0);
655 }
656
657 return mr;
658 }
659 EXPORT_SYMBOL(ib_reg_phys_mr);
660
661 int ib_rereg_phys_mr(struct ib_mr *mr,
662 int mr_rereg_mask,
663 struct ib_pd *pd,
664 struct ib_phys_buf *phys_buf_array,
665 int num_phys_buf,
666 int mr_access_flags,
667 u64 *iova_start)
668 {
669 struct ib_pd *old_pd;
670 int ret;
671
672 if (!mr->device->rereg_phys_mr)
673 return -ENOSYS;
674
675 if (atomic_read(&mr->usecnt))
676 return -EBUSY;
677
678 old_pd = mr->pd;
679
680 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
681 phys_buf_array, num_phys_buf,
682 mr_access_flags, iova_start);
683
684 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
685 atomic_dec(&old_pd->usecnt);
686 atomic_inc(&pd->usecnt);
687 }
688
689 return ret;
690 }
691 EXPORT_SYMBOL(ib_rereg_phys_mr);
692
693 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
694 {
695 return mr->device->query_mr ?
696 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
697 }
698 EXPORT_SYMBOL(ib_query_mr);
699
700 int ib_dereg_mr(struct ib_mr *mr)
701 {
702 struct ib_pd *pd;
703 int ret;
704
705 if (atomic_read(&mr->usecnt))
706 return -EBUSY;
707
708 pd = mr->pd;
709 ret = mr->device->dereg_mr(mr);
710 if (!ret)
711 atomic_dec(&pd->usecnt);
712
713 return ret;
714 }
715 EXPORT_SYMBOL(ib_dereg_mr);
716
717 /* Memory windows */
718
719 struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
720 {
721 struct ib_mw *mw;
722
723 if (!pd->device->alloc_mw)
724 return ERR_PTR(-ENOSYS);
725
726 mw = pd->device->alloc_mw(pd);
727 if (!IS_ERR(mw)) {
728 mw->device = pd->device;
729 mw->pd = pd;
730 mw->uobject = NULL;
731 atomic_inc(&pd->usecnt);
732 }
733
734 return mw;
735 }
736 EXPORT_SYMBOL(ib_alloc_mw);
737
738 int ib_dealloc_mw(struct ib_mw *mw)
739 {
740 struct ib_pd *pd;
741 int ret;
742
743 pd = mw->pd;
744 ret = mw->device->dealloc_mw(mw);
745 if (!ret)
746 atomic_dec(&pd->usecnt);
747
748 return ret;
749 }
750 EXPORT_SYMBOL(ib_dealloc_mw);
751
752 /* "Fast" memory regions */
753
754 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
755 int mr_access_flags,
756 struct ib_fmr_attr *fmr_attr)
757 {
758 struct ib_fmr *fmr;
759
760 if (!pd->device->alloc_fmr)
761 return ERR_PTR(-ENOSYS);
762
763 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
764 if (!IS_ERR(fmr)) {
765 fmr->device = pd->device;
766 fmr->pd = pd;
767 atomic_inc(&pd->usecnt);
768 }
769
770 return fmr;
771 }
772 EXPORT_SYMBOL(ib_alloc_fmr);
773
774 int ib_unmap_fmr(struct list_head *fmr_list)
775 {
776 struct ib_fmr *fmr;
777
778 if (list_empty(fmr_list))
779 return 0;
780
781 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
782 return fmr->device->unmap_fmr(fmr_list);
783 }
784 EXPORT_SYMBOL(ib_unmap_fmr);
785
786 int ib_dealloc_fmr(struct ib_fmr *fmr)
787 {
788 struct ib_pd *pd;
789 int ret;
790
791 pd = fmr->pd;
792 ret = fmr->device->dealloc_fmr(fmr);
793 if (!ret)
794 atomic_dec(&pd->usecnt);
795
796 return ret;
797 }
798 EXPORT_SYMBOL(ib_dealloc_fmr);
799
800 /* Multicast groups */
801
802 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
803 {
804 if (!qp->device->attach_mcast)
805 return -ENOSYS;
806 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
807 return -EINVAL;
808
809 return qp->device->attach_mcast(qp, gid, lid);
810 }
811 EXPORT_SYMBOL(ib_attach_mcast);
812
813 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
814 {
815 if (!qp->device->detach_mcast)
816 return -ENOSYS;
817 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
818 return -EINVAL;
819
820 return qp->device->detach_mcast(qp, gid, lid);
821 }
822 EXPORT_SYMBOL(ib_detach_mcast);
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