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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / infiniband / core / verbs.c
bloba321df28bab2696404e76a365c861637867b68d2
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
39 #include <linux/errno.h>
40 #include <linux/err.h>
41 #include <linux/export.h>
42 #include <linux/string.h>
43 #include <linux/slab.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 int ib_rate_to_mbps(enum ib_rate rate)
83 {
84 switch (rate) {
85 case IB_RATE_2_5_GBPS: return 2500;
86 case IB_RATE_5_GBPS: return 5000;
87 case IB_RATE_10_GBPS: return 10000;
88 case IB_RATE_20_GBPS: return 20000;
89 case IB_RATE_30_GBPS: return 30000;
90 case IB_RATE_40_GBPS: return 40000;
91 case IB_RATE_60_GBPS: return 60000;
92 case IB_RATE_80_GBPS: return 80000;
93 case IB_RATE_120_GBPS: return 120000;
94 case IB_RATE_14_GBPS: return 14062;
95 case IB_RATE_56_GBPS: return 56250;
96 case IB_RATE_112_GBPS: return 112500;
97 case IB_RATE_168_GBPS: return 168750;
98 case IB_RATE_25_GBPS: return 25781;
99 case IB_RATE_100_GBPS: return 103125;
100 case IB_RATE_200_GBPS: return 206250;
101 case IB_RATE_300_GBPS: return 309375;
102 default: return -1;
103 }
104 }
105 EXPORT_SYMBOL(ib_rate_to_mbps);
106
107 enum rdma_transport_type
108 rdma_node_get_transport(enum rdma_node_type node_type)
109 {
110 switch (node_type) {
111 case RDMA_NODE_IB_CA:
112 case RDMA_NODE_IB_SWITCH:
113 case RDMA_NODE_IB_ROUTER:
114 return RDMA_TRANSPORT_IB;
115 case RDMA_NODE_RNIC:
116 return RDMA_TRANSPORT_IWARP;
117 default:
118 BUG();
119 return 0;
120 }
121 }
122 EXPORT_SYMBOL(rdma_node_get_transport);
123
124 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
125 {
126 if (device->get_link_layer)
127 return device->get_link_layer(device, port_num);
128
129 switch (rdma_node_get_transport(device->node_type)) {
130 case RDMA_TRANSPORT_IB:
131 return IB_LINK_LAYER_INFINIBAND;
132 case RDMA_TRANSPORT_IWARP:
133 return IB_LINK_LAYER_ETHERNET;
134 default:
135 return IB_LINK_LAYER_UNSPECIFIED;
136 }
137 }
138 EXPORT_SYMBOL(rdma_port_get_link_layer);
139
140 /* Protection domains */
141
142 struct ib_pd *ib_alloc_pd(struct ib_device *device)
143 {
144 struct ib_pd *pd;
145
146 pd = device->alloc_pd(device, NULL, NULL);
147
148 if (!IS_ERR(pd)) {
149 pd->device = device;
150 pd->uobject = NULL;
151 atomic_set(&pd->usecnt, 0);
152 }
153
154 return pd;
155 }
156 EXPORT_SYMBOL(ib_alloc_pd);
157
158 int ib_dealloc_pd(struct ib_pd *pd)
159 {
160 if (atomic_read(&pd->usecnt))
161 return -EBUSY;
162
163 return pd->device->dealloc_pd(pd);
164 }
165 EXPORT_SYMBOL(ib_dealloc_pd);
166
167 /* Address handles */
168
169 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
170 {
171 struct ib_ah *ah;
172
173 ah = pd->device->create_ah(pd, ah_attr);
174
175 if (!IS_ERR(ah)) {
176 ah->device = pd->device;
177 ah->pd = pd;
178 ah->uobject = NULL;
179 atomic_inc(&pd->usecnt);
180 }
181
182 return ah;
183 }
184 EXPORT_SYMBOL(ib_create_ah);
185
186 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
187 struct ib_grh *grh, struct ib_ah_attr *ah_attr)
188 {
189 u32 flow_class;
190 u16 gid_index;
191 int ret;
192
193 memset(ah_attr, 0, sizeof *ah_attr);
194 ah_attr->dlid = wc->slid;
195 ah_attr->sl = wc->sl;
196 ah_attr->src_path_bits = wc->dlid_path_bits;
197 ah_attr->port_num = port_num;
198
199 if (wc->wc_flags & IB_WC_GRH) {
200 ah_attr->ah_flags = IB_AH_GRH;
201 ah_attr->grh.dgid = grh->sgid;
202
203 ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
204 &gid_index);
205 if (ret)
206 return ret;
207
208 ah_attr->grh.sgid_index = (u8) gid_index;
209 flow_class = be32_to_cpu(grh->version_tclass_flow);
210 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
211 ah_attr->grh.hop_limit = 0xFF;
212 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
213 }
214 return 0;
215 }
216 EXPORT_SYMBOL(ib_init_ah_from_wc);
217
218 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
219 struct ib_grh *grh, u8 port_num)
220 {
221 struct ib_ah_attr ah_attr;
222 int ret;
223
224 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
225 if (ret)
226 return ERR_PTR(ret);
227
228 return ib_create_ah(pd, &ah_attr);
229 }
230 EXPORT_SYMBOL(ib_create_ah_from_wc);
231
232 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
233 {
234 return ah->device->modify_ah ?
235 ah->device->modify_ah(ah, ah_attr) :
236 -ENOSYS;
237 }
238 EXPORT_SYMBOL(ib_modify_ah);
239
240 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
241 {
242 return ah->device->query_ah ?
243 ah->device->query_ah(ah, ah_attr) :
244 -ENOSYS;
245 }
246 EXPORT_SYMBOL(ib_query_ah);
247
248 int ib_destroy_ah(struct ib_ah *ah)
249 {
250 struct ib_pd *pd;
251 int ret;
252
253 pd = ah->pd;
254 ret = ah->device->destroy_ah(ah);
255 if (!ret)
256 atomic_dec(&pd->usecnt);
257
258 return ret;
259 }
260 EXPORT_SYMBOL(ib_destroy_ah);
261
262 /* Shared receive queues */
263
264 struct ib_srq *ib_create_srq(struct ib_pd *pd,
265 struct ib_srq_init_attr *srq_init_attr)
266 {
267 struct ib_srq *srq;
268
269 if (!pd->device->create_srq)
270 return ERR_PTR(-ENOSYS);
271
272 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
273
274 if (!IS_ERR(srq)) {
275 srq->device = pd->device;
276 srq->pd = pd;
277 srq->uobject = NULL;
278 srq->event_handler = srq_init_attr->event_handler;
279 srq->srq_context = srq_init_attr->srq_context;
280 srq->srq_type = srq_init_attr->srq_type;
281 if (srq->srq_type == IB_SRQT_XRC) {
282 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
283 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq;
284 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
285 atomic_inc(&srq->ext.xrc.cq->usecnt);
286 }
287 atomic_inc(&pd->usecnt);
288 atomic_set(&srq->usecnt, 0);
289 }
290
291 return srq;
292 }
293 EXPORT_SYMBOL(ib_create_srq);
294
295 int ib_modify_srq(struct ib_srq *srq,
296 struct ib_srq_attr *srq_attr,
297 enum ib_srq_attr_mask srq_attr_mask)
298 {
299 return srq->device->modify_srq ?
300 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
301 -ENOSYS;
302 }
303 EXPORT_SYMBOL(ib_modify_srq);
304
305 int ib_query_srq(struct ib_srq *srq,
306 struct ib_srq_attr *srq_attr)
307 {
308 return srq->device->query_srq ?
309 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
310 }
311 EXPORT_SYMBOL(ib_query_srq);
312
313 int ib_destroy_srq(struct ib_srq *srq)
314 {
315 struct ib_pd *pd;
316 enum ib_srq_type srq_type;
317 struct ib_xrcd *uninitialized_var(xrcd);
318 struct ib_cq *uninitialized_var(cq);
319 int ret;
320
321 if (atomic_read(&srq->usecnt))
322 return -EBUSY;
323
324 pd = srq->pd;
325 srq_type = srq->srq_type;
326 if (srq_type == IB_SRQT_XRC) {
327 xrcd = srq->ext.xrc.xrcd;
328 cq = srq->ext.xrc.cq;
329 }
330
331 ret = srq->device->destroy_srq(srq);
332 if (!ret) {
333 atomic_dec(&pd->usecnt);
334 if (srq_type == IB_SRQT_XRC) {
335 atomic_dec(&xrcd->usecnt);
336 atomic_dec(&cq->usecnt);
337 }
338 }
339
340 return ret;
341 }
342 EXPORT_SYMBOL(ib_destroy_srq);
343
344 /* Queue pairs */
345
346 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
347 {
348 struct ib_qp *qp = context;
349 unsigned long flags;
350
351 spin_lock_irqsave(&qp->device->event_handler_lock, flags);
352 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
353 if (event->element.qp->event_handler)
354 event->element.qp->event_handler(event, event->element.qp->qp_context);
355 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
356 }
357
358 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
359 {
360 mutex_lock(&xrcd->tgt_qp_mutex);
361 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
362 mutex_unlock(&xrcd->tgt_qp_mutex);
363 }
364
365 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
366 void (*event_handler)(struct ib_event *, void *),
367 void *qp_context)
368 {
369 struct ib_qp *qp;
370 unsigned long flags;
371
372 qp = kzalloc(sizeof *qp, GFP_KERNEL);
373 if (!qp)
374 return ERR_PTR(-ENOMEM);
375
376 qp->real_qp = real_qp;
377 atomic_inc(&real_qp->usecnt);
378 qp->device = real_qp->device;
379 qp->event_handler = event_handler;
380 qp->qp_context = qp_context;
381 qp->qp_num = real_qp->qp_num;
382 qp->qp_type = real_qp->qp_type;
383
384 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
385 list_add(&qp->open_list, &real_qp->open_list);
386 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
387
388 return qp;
389 }
390
391 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
392 struct ib_qp_open_attr *qp_open_attr)
393 {
394 struct ib_qp *qp, *real_qp;
395
396 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
397 return ERR_PTR(-EINVAL);
398
399 qp = ERR_PTR(-EINVAL);
400 mutex_lock(&xrcd->tgt_qp_mutex);
401 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
402 if (real_qp->qp_num == qp_open_attr->qp_num) {
403 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
404 qp_open_attr->qp_context);
405 break;
406 }
407 }
408 mutex_unlock(&xrcd->tgt_qp_mutex);
409 return qp;
410 }
411 EXPORT_SYMBOL(ib_open_qp);
412
413 struct ib_qp *ib_create_qp(struct ib_pd *pd,
414 struct ib_qp_init_attr *qp_init_attr)
415 {
416 struct ib_qp *qp, *real_qp;
417 struct ib_device *device;
418
419 device = pd ? pd->device : qp_init_attr->xrcd->device;
420 qp = device->create_qp(pd, qp_init_attr, NULL);
421
422 if (!IS_ERR(qp)) {
423 qp->device = device;
424 qp->real_qp = qp;
425 qp->uobject = NULL;
426 qp->qp_type = qp_init_attr->qp_type;
427
428 atomic_set(&qp->usecnt, 0);
429 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
430 qp->event_handler = __ib_shared_qp_event_handler;
431 qp->qp_context = qp;
432 qp->pd = NULL;
433 qp->send_cq = qp->recv_cq = NULL;
434 qp->srq = NULL;
435 qp->xrcd = qp_init_attr->xrcd;
436 atomic_inc(&qp_init_attr->xrcd->usecnt);
437 INIT_LIST_HEAD(&qp->open_list);
438
439 real_qp = qp;
440 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
441 qp_init_attr->qp_context);
442 if (!IS_ERR(qp))
443 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
444 else
445 real_qp->device->destroy_qp(real_qp);
446 } else {
447 qp->event_handler = qp_init_attr->event_handler;
448 qp->qp_context = qp_init_attr->qp_context;
449 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
450 qp->recv_cq = NULL;
451 qp->srq = NULL;
452 } else {
453 qp->recv_cq = qp_init_attr->recv_cq;
454 atomic_inc(&qp_init_attr->recv_cq->usecnt);
455 qp->srq = qp_init_attr->srq;
456 if (qp->srq)
457 atomic_inc(&qp_init_attr->srq->usecnt);
458 }
459
460 qp->pd = pd;
461 qp->send_cq = qp_init_attr->send_cq;
462 qp->xrcd = NULL;
463
464 atomic_inc(&pd->usecnt);
465 atomic_inc(&qp_init_attr->send_cq->usecnt);
466 }
467 }
468
469 return qp;
470 }
471 EXPORT_SYMBOL(ib_create_qp);
472
473 static const struct {
474 int valid;
475 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
476 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
477 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
478 [IB_QPS_RESET] = {
479 [IB_QPS_RESET] = { .valid = 1 },
480 [IB_QPS_INIT] = {
481 .valid = 1,
482 .req_param = {
483 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
484 IB_QP_PORT |
485 IB_QP_QKEY),
486 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
487 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
488 IB_QP_PORT |
489 IB_QP_ACCESS_FLAGS),
490 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
491 IB_QP_PORT |
492 IB_QP_ACCESS_FLAGS),
493 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
494 IB_QP_PORT |
495 IB_QP_ACCESS_FLAGS),
496 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
497 IB_QP_PORT |
498 IB_QP_ACCESS_FLAGS),
499 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
500 IB_QP_QKEY),
501 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
502 IB_QP_QKEY),
503 }
504 },
505 },
506 [IB_QPS_INIT] = {
507 [IB_QPS_RESET] = { .valid = 1 },
508 [IB_QPS_ERR] = { .valid = 1 },
509 [IB_QPS_INIT] = {
510 .valid = 1,
511 .opt_param = {
512 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
513 IB_QP_PORT |
514 IB_QP_QKEY),
515 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
516 IB_QP_PORT |
517 IB_QP_ACCESS_FLAGS),
518 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
519 IB_QP_PORT |
520 IB_QP_ACCESS_FLAGS),
521 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
522 IB_QP_PORT |
523 IB_QP_ACCESS_FLAGS),
524 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
525 IB_QP_PORT |
526 IB_QP_ACCESS_FLAGS),
527 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
528 IB_QP_QKEY),
529 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
530 IB_QP_QKEY),
531 }
532 },
533 [IB_QPS_RTR] = {
534 .valid = 1,
535 .req_param = {
536 [IB_QPT_UC] = (IB_QP_AV |
537 IB_QP_PATH_MTU |
538 IB_QP_DEST_QPN |
539 IB_QP_RQ_PSN),
540 [IB_QPT_RC] = (IB_QP_AV |
541 IB_QP_PATH_MTU |
542 IB_QP_DEST_QPN |
543 IB_QP_RQ_PSN |
544 IB_QP_MAX_DEST_RD_ATOMIC |
545 IB_QP_MIN_RNR_TIMER),
546 [IB_QPT_XRC_INI] = (IB_QP_AV |
547 IB_QP_PATH_MTU |
548 IB_QP_DEST_QPN |
549 IB_QP_RQ_PSN),
550 [IB_QPT_XRC_TGT] = (IB_QP_AV |
551 IB_QP_PATH_MTU |
552 IB_QP_DEST_QPN |
553 IB_QP_RQ_PSN |
554 IB_QP_MAX_DEST_RD_ATOMIC |
555 IB_QP_MIN_RNR_TIMER),
556 },
557 .opt_param = {
558 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
559 IB_QP_QKEY),
560 [IB_QPT_UC] = (IB_QP_ALT_PATH |
561 IB_QP_ACCESS_FLAGS |
562 IB_QP_PKEY_INDEX),
563 [IB_QPT_RC] = (IB_QP_ALT_PATH |
564 IB_QP_ACCESS_FLAGS |
565 IB_QP_PKEY_INDEX),
566 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
567 IB_QP_ACCESS_FLAGS |
568 IB_QP_PKEY_INDEX),
569 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
570 IB_QP_ACCESS_FLAGS |
571 IB_QP_PKEY_INDEX),
572 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
573 IB_QP_QKEY),
574 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
575 IB_QP_QKEY),
576 }
577 }
578 },
579 [IB_QPS_RTR] = {
580 [IB_QPS_RESET] = { .valid = 1 },
581 [IB_QPS_ERR] = { .valid = 1 },
582 [IB_QPS_RTS] = {
583 .valid = 1,
584 .req_param = {
585 [IB_QPT_UD] = IB_QP_SQ_PSN,
586 [IB_QPT_UC] = IB_QP_SQ_PSN,
587 [IB_QPT_RC] = (IB_QP_TIMEOUT |
588 IB_QP_RETRY_CNT |
589 IB_QP_RNR_RETRY |
590 IB_QP_SQ_PSN |
591 IB_QP_MAX_QP_RD_ATOMIC),
592 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
593 IB_QP_RETRY_CNT |
594 IB_QP_RNR_RETRY |
595 IB_QP_SQ_PSN |
596 IB_QP_MAX_QP_RD_ATOMIC),
597 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
598 IB_QP_SQ_PSN),
599 [IB_QPT_SMI] = IB_QP_SQ_PSN,
600 [IB_QPT_GSI] = IB_QP_SQ_PSN,
601 },
602 .opt_param = {
603 [IB_QPT_UD] = (IB_QP_CUR_STATE |
604 IB_QP_QKEY),
605 [IB_QPT_UC] = (IB_QP_CUR_STATE |
606 IB_QP_ALT_PATH |
607 IB_QP_ACCESS_FLAGS |
608 IB_QP_PATH_MIG_STATE),
609 [IB_QPT_RC] = (IB_QP_CUR_STATE |
610 IB_QP_ALT_PATH |
611 IB_QP_ACCESS_FLAGS |
612 IB_QP_MIN_RNR_TIMER |
613 IB_QP_PATH_MIG_STATE),
614 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
615 IB_QP_ALT_PATH |
616 IB_QP_ACCESS_FLAGS |
617 IB_QP_PATH_MIG_STATE),
618 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
619 IB_QP_ALT_PATH |
620 IB_QP_ACCESS_FLAGS |
621 IB_QP_MIN_RNR_TIMER |
622 IB_QP_PATH_MIG_STATE),
623 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
624 IB_QP_QKEY),
625 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
626 IB_QP_QKEY),
627 }
628 }
629 },
630 [IB_QPS_RTS] = {
631 [IB_QPS_RESET] = { .valid = 1 },
632 [IB_QPS_ERR] = { .valid = 1 },
633 [IB_QPS_RTS] = {
634 .valid = 1,
635 .opt_param = {
636 [IB_QPT_UD] = (IB_QP_CUR_STATE |
637 IB_QP_QKEY),
638 [IB_QPT_UC] = (IB_QP_CUR_STATE |
639 IB_QP_ACCESS_FLAGS |
640 IB_QP_ALT_PATH |
641 IB_QP_PATH_MIG_STATE),
642 [IB_QPT_RC] = (IB_QP_CUR_STATE |
643 IB_QP_ACCESS_FLAGS |
644 IB_QP_ALT_PATH |
645 IB_QP_PATH_MIG_STATE |
646 IB_QP_MIN_RNR_TIMER),
647 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
648 IB_QP_ACCESS_FLAGS |
649 IB_QP_ALT_PATH |
650 IB_QP_PATH_MIG_STATE),
651 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
652 IB_QP_ACCESS_FLAGS |
653 IB_QP_ALT_PATH |
654 IB_QP_PATH_MIG_STATE |
655 IB_QP_MIN_RNR_TIMER),
656 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
657 IB_QP_QKEY),
658 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
659 IB_QP_QKEY),
660 }
661 },
662 [IB_QPS_SQD] = {
663 .valid = 1,
664 .opt_param = {
665 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
666 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
667 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
668 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
669 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
670 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
671 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
672 }
673 },
674 },
675 [IB_QPS_SQD] = {
676 [IB_QPS_RESET] = { .valid = 1 },
677 [IB_QPS_ERR] = { .valid = 1 },
678 [IB_QPS_RTS] = {
679 .valid = 1,
680 .opt_param = {
681 [IB_QPT_UD] = (IB_QP_CUR_STATE |
682 IB_QP_QKEY),
683 [IB_QPT_UC] = (IB_QP_CUR_STATE |
684 IB_QP_ALT_PATH |
685 IB_QP_ACCESS_FLAGS |
686 IB_QP_PATH_MIG_STATE),
687 [IB_QPT_RC] = (IB_QP_CUR_STATE |
688 IB_QP_ALT_PATH |
689 IB_QP_ACCESS_FLAGS |
690 IB_QP_MIN_RNR_TIMER |
691 IB_QP_PATH_MIG_STATE),
692 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
693 IB_QP_ALT_PATH |
694 IB_QP_ACCESS_FLAGS |
695 IB_QP_PATH_MIG_STATE),
696 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
697 IB_QP_ALT_PATH |
698 IB_QP_ACCESS_FLAGS |
699 IB_QP_MIN_RNR_TIMER |
700 IB_QP_PATH_MIG_STATE),
701 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
702 IB_QP_QKEY),
703 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
704 IB_QP_QKEY),
705 }
706 },
707 [IB_QPS_SQD] = {
708 .valid = 1,
709 .opt_param = {
710 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
711 IB_QP_QKEY),
712 [IB_QPT_UC] = (IB_QP_AV |
713 IB_QP_ALT_PATH |
714 IB_QP_ACCESS_FLAGS |
715 IB_QP_PKEY_INDEX |
716 IB_QP_PATH_MIG_STATE),
717 [IB_QPT_RC] = (IB_QP_PORT |
718 IB_QP_AV |
719 IB_QP_TIMEOUT |
720 IB_QP_RETRY_CNT |
721 IB_QP_RNR_RETRY |
722 IB_QP_MAX_QP_RD_ATOMIC |
723 IB_QP_MAX_DEST_RD_ATOMIC |
724 IB_QP_ALT_PATH |
725 IB_QP_ACCESS_FLAGS |
726 IB_QP_PKEY_INDEX |
727 IB_QP_MIN_RNR_TIMER |
728 IB_QP_PATH_MIG_STATE),
729 [IB_QPT_XRC_INI] = (IB_QP_PORT |
730 IB_QP_AV |
731 IB_QP_TIMEOUT |
732 IB_QP_RETRY_CNT |
733 IB_QP_RNR_RETRY |
734 IB_QP_MAX_QP_RD_ATOMIC |
735 IB_QP_ALT_PATH |
736 IB_QP_ACCESS_FLAGS |
737 IB_QP_PKEY_INDEX |
738 IB_QP_PATH_MIG_STATE),
739 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
740 IB_QP_AV |
741 IB_QP_TIMEOUT |
742 IB_QP_MAX_DEST_RD_ATOMIC |
743 IB_QP_ALT_PATH |
744 IB_QP_ACCESS_FLAGS |
745 IB_QP_PKEY_INDEX |
746 IB_QP_MIN_RNR_TIMER |
747 IB_QP_PATH_MIG_STATE),
748 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
749 IB_QP_QKEY),
750 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
751 IB_QP_QKEY),
752 }
753 }
754 },
755 [IB_QPS_SQE] = {
756 [IB_QPS_RESET] = { .valid = 1 },
757 [IB_QPS_ERR] = { .valid = 1 },
758 [IB_QPS_RTS] = {
759 .valid = 1,
760 .opt_param = {
761 [IB_QPT_UD] = (IB_QP_CUR_STATE |
762 IB_QP_QKEY),
763 [IB_QPT_UC] = (IB_QP_CUR_STATE |
764 IB_QP_ACCESS_FLAGS),
765 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
766 IB_QP_QKEY),
767 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
768 IB_QP_QKEY),
769 }
770 }
771 },
772 [IB_QPS_ERR] = {
773 [IB_QPS_RESET] = { .valid = 1 },
774 [IB_QPS_ERR] = { .valid = 1 }
775 }
776 };
777
778 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
779 enum ib_qp_type type, enum ib_qp_attr_mask mask)
780 {
781 enum ib_qp_attr_mask req_param, opt_param;
782
783 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
784 next_state < 0 || next_state > IB_QPS_ERR)
785 return 0;
786
787 if (mask & IB_QP_CUR_STATE &&
788 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
789 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
790 return 0;
791
792 if (!qp_state_table[cur_state][next_state].valid)
793 return 0;
794
795 req_param = qp_state_table[cur_state][next_state].req_param[type];
796 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
797
798 if ((mask & req_param) != req_param)
799 return 0;
800
801 if (mask & ~(req_param | opt_param | IB_QP_STATE))
802 return 0;
803
804 return 1;
805 }
806 EXPORT_SYMBOL(ib_modify_qp_is_ok);
807
808 int ib_modify_qp(struct ib_qp *qp,
809 struct ib_qp_attr *qp_attr,
810 int qp_attr_mask)
811 {
812 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
813 }
814 EXPORT_SYMBOL(ib_modify_qp);
815
816 int ib_query_qp(struct ib_qp *qp,
817 struct ib_qp_attr *qp_attr,
818 int qp_attr_mask,
819 struct ib_qp_init_attr *qp_init_attr)
820 {
821 return qp->device->query_qp ?
822 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
823 -ENOSYS;
824 }
825 EXPORT_SYMBOL(ib_query_qp);
826
827 int ib_close_qp(struct ib_qp *qp)
828 {
829 struct ib_qp *real_qp;
830 unsigned long flags;
831
832 real_qp = qp->real_qp;
833 if (real_qp == qp)
834 return -EINVAL;
835
836 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
837 list_del(&qp->open_list);
838 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
839
840 atomic_dec(&real_qp->usecnt);
841 kfree(qp);
842
843 return 0;
844 }
845 EXPORT_SYMBOL(ib_close_qp);
846
847 static int __ib_destroy_shared_qp(struct ib_qp *qp)
848 {
849 struct ib_xrcd *xrcd;
850 struct ib_qp *real_qp;
851 int ret;
852
853 real_qp = qp->real_qp;
854 xrcd = real_qp->xrcd;
855
856 mutex_lock(&xrcd->tgt_qp_mutex);
857 ib_close_qp(qp);
858 if (atomic_read(&real_qp->usecnt) == 0)
859 list_del(&real_qp->xrcd_list);
860 else
861 real_qp = NULL;
862 mutex_unlock(&xrcd->tgt_qp_mutex);
863
864 if (real_qp) {
865 ret = ib_destroy_qp(real_qp);
866 if (!ret)
867 atomic_dec(&xrcd->usecnt);
868 else
869 __ib_insert_xrcd_qp(xrcd, real_qp);
870 }
871
872 return 0;
873 }
874
875 int ib_destroy_qp(struct ib_qp *qp)
876 {
877 struct ib_pd *pd;
878 struct ib_cq *scq, *rcq;
879 struct ib_srq *srq;
880 int ret;
881
882 if (atomic_read(&qp->usecnt))
883 return -EBUSY;
884
885 if (qp->real_qp != qp)
886 return __ib_destroy_shared_qp(qp);
887
888 pd = qp->pd;
889 scq = qp->send_cq;
890 rcq = qp->recv_cq;
891 srq = qp->srq;
892
893 ret = qp->device->destroy_qp(qp);
894 if (!ret) {
895 if (pd)
896 atomic_dec(&pd->usecnt);
897 if (scq)
898 atomic_dec(&scq->usecnt);
899 if (rcq)
900 atomic_dec(&rcq->usecnt);
901 if (srq)
902 atomic_dec(&srq->usecnt);
903 }
904
905 return ret;
906 }
907 EXPORT_SYMBOL(ib_destroy_qp);
908
909 /* Completion queues */
910
911 struct ib_cq *ib_create_cq(struct ib_device *device,
912 ib_comp_handler comp_handler,
913 void (*event_handler)(struct ib_event *, void *),
914 void *cq_context, int cqe, int comp_vector)
915 {
916 struct ib_cq *cq;
917
918 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
919
920 if (!IS_ERR(cq)) {
921 cq->device = device;
922 cq->uobject = NULL;
923 cq->comp_handler = comp_handler;
924 cq->event_handler = event_handler;
925 cq->cq_context = cq_context;
926 atomic_set(&cq->usecnt, 0);
927 }
928
929 return cq;
930 }
931 EXPORT_SYMBOL(ib_create_cq);
932
933 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
934 {
935 return cq->device->modify_cq ?
936 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
937 }
938 EXPORT_SYMBOL(ib_modify_cq);
939
940 int ib_destroy_cq(struct ib_cq *cq)
941 {
942 if (atomic_read(&cq->usecnt))
943 return -EBUSY;
944
945 return cq->device->destroy_cq(cq);
946 }
947 EXPORT_SYMBOL(ib_destroy_cq);
948
949 int ib_resize_cq(struct ib_cq *cq, int cqe)
950 {
951 return cq->device->resize_cq ?
952 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
953 }
954 EXPORT_SYMBOL(ib_resize_cq);
955
956 /* Memory regions */
957
958 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
959 {
960 struct ib_mr *mr;
961
962 mr = pd->device->get_dma_mr(pd, mr_access_flags);
963
964 if (!IS_ERR(mr)) {
965 mr->device = pd->device;
966 mr->pd = pd;
967 mr->uobject = NULL;
968 atomic_inc(&pd->usecnt);
969 atomic_set(&mr->usecnt, 0);
970 }
971
972 return mr;
973 }
974 EXPORT_SYMBOL(ib_get_dma_mr);
975
976 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
977 struct ib_phys_buf *phys_buf_array,
978 int num_phys_buf,
979 int mr_access_flags,
980 u64 *iova_start)
981 {
982 struct ib_mr *mr;
983
984 if (!pd->device->reg_phys_mr)
985 return ERR_PTR(-ENOSYS);
986
987 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
988 mr_access_flags, iova_start);
989
990 if (!IS_ERR(mr)) {
991 mr->device = pd->device;
992 mr->pd = pd;
993 mr->uobject = NULL;
994 atomic_inc(&pd->usecnt);
995 atomic_set(&mr->usecnt, 0);
996 }
997
998 return mr;
999 }
1000 EXPORT_SYMBOL(ib_reg_phys_mr);
1001
1002 int ib_rereg_phys_mr(struct ib_mr *mr,
1003 int mr_rereg_mask,
1004 struct ib_pd *pd,
1005 struct ib_phys_buf *phys_buf_array,
1006 int num_phys_buf,
1007 int mr_access_flags,
1008 u64 *iova_start)
1009 {
1010 struct ib_pd *old_pd;
1011 int ret;
1012
1013 if (!mr->device->rereg_phys_mr)
1014 return -ENOSYS;
1015
1016 if (atomic_read(&mr->usecnt))
1017 return -EBUSY;
1018
1019 old_pd = mr->pd;
1020
1021 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
1022 phys_buf_array, num_phys_buf,
1023 mr_access_flags, iova_start);
1024
1025 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
1026 atomic_dec(&old_pd->usecnt);
1027 atomic_inc(&pd->usecnt);
1028 }
1029
1030 return ret;
1031 }
1032 EXPORT_SYMBOL(ib_rereg_phys_mr);
1033
1034 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
1035 {
1036 return mr->device->query_mr ?
1037 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
1038 }
1039 EXPORT_SYMBOL(ib_query_mr);
1040
1041 int ib_dereg_mr(struct ib_mr *mr)
1042 {
1043 struct ib_pd *pd;
1044 int ret;
1045
1046 if (atomic_read(&mr->usecnt))
1047 return -EBUSY;
1048
1049 pd = mr->pd;
1050 ret = mr->device->dereg_mr(mr);
1051 if (!ret)
1052 atomic_dec(&pd->usecnt);
1053
1054 return ret;
1055 }
1056 EXPORT_SYMBOL(ib_dereg_mr);
1057
1058 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
1059 {
1060 struct ib_mr *mr;
1061
1062 if (!pd->device->alloc_fast_reg_mr)
1063 return ERR_PTR(-ENOSYS);
1064
1065 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len);
1066
1067 if (!IS_ERR(mr)) {
1068 mr->device = pd->device;
1069 mr->pd = pd;
1070 mr->uobject = NULL;
1071 atomic_inc(&pd->usecnt);
1072 atomic_set(&mr->usecnt, 0);
1073 }
1074
1075 return mr;
1076 }
1077 EXPORT_SYMBOL(ib_alloc_fast_reg_mr);
1078
1079 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
1080 int max_page_list_len)
1081 {
1082 struct ib_fast_reg_page_list *page_list;
1083
1084 if (!device->alloc_fast_reg_page_list)
1085 return ERR_PTR(-ENOSYS);
1086
1087 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
1088
1089 if (!IS_ERR(page_list)) {
1090 page_list->device = device;
1091 page_list->max_page_list_len = max_page_list_len;
1092 }
1093
1094 return page_list;
1095 }
1096 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
1097
1098 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
1099 {
1100 page_list->device->free_fast_reg_page_list(page_list);
1101 }
1102 EXPORT_SYMBOL(ib_free_fast_reg_page_list);
1103
1104 /* Memory windows */
1105
1106 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
1107 {
1108 struct ib_mw *mw;
1109
1110 if (!pd->device->alloc_mw)
1111 return ERR_PTR(-ENOSYS);
1112
1113 mw = pd->device->alloc_mw(pd, type);
1114 if (!IS_ERR(mw)) {
1115 mw->device = pd->device;
1116 mw->pd = pd;
1117 mw->uobject = NULL;
1118 mw->type = type;
1119 atomic_inc(&pd->usecnt);
1120 }
1121
1122 return mw;
1123 }
1124 EXPORT_SYMBOL(ib_alloc_mw);
1125
1126 int ib_dealloc_mw(struct ib_mw *mw)
1127 {
1128 struct ib_pd *pd;
1129 int ret;
1130
1131 pd = mw->pd;
1132 ret = mw->device->dealloc_mw(mw);
1133 if (!ret)
1134 atomic_dec(&pd->usecnt);
1135
1136 return ret;
1137 }
1138 EXPORT_SYMBOL(ib_dealloc_mw);
1139
1140 /* "Fast" memory regions */
1141
1142 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1143 int mr_access_flags,
1144 struct ib_fmr_attr *fmr_attr)
1145 {
1146 struct ib_fmr *fmr;
1147
1148 if (!pd->device->alloc_fmr)
1149 return ERR_PTR(-ENOSYS);
1150
1151 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1152 if (!IS_ERR(fmr)) {
1153 fmr->device = pd->device;
1154 fmr->pd = pd;
1155 atomic_inc(&pd->usecnt);
1156 }
1157
1158 return fmr;
1159 }
1160 EXPORT_SYMBOL(ib_alloc_fmr);
1161
1162 int ib_unmap_fmr(struct list_head *fmr_list)
1163 {
1164 struct ib_fmr *fmr;
1165
1166 if (list_empty(fmr_list))
1167 return 0;
1168
1169 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1170 return fmr->device->unmap_fmr(fmr_list);
1171 }
1172 EXPORT_SYMBOL(ib_unmap_fmr);
1173
1174 int ib_dealloc_fmr(struct ib_fmr *fmr)
1175 {
1176 struct ib_pd *pd;
1177 int ret;
1178
1179 pd = fmr->pd;
1180 ret = fmr->device->dealloc_fmr(fmr);
1181 if (!ret)
1182 atomic_dec(&pd->usecnt);
1183
1184 return ret;
1185 }
1186 EXPORT_SYMBOL(ib_dealloc_fmr);
1187
1188 /* Multicast groups */
1189
1190 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1191 {
1192 int ret;
1193
1194 if (!qp->device->attach_mcast)
1195 return -ENOSYS;
1196 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1197 return -EINVAL;
1198
1199 ret = qp->device->attach_mcast(qp, gid, lid);
1200 if (!ret)
1201 atomic_inc(&qp->usecnt);
1202 return ret;
1203 }
1204 EXPORT_SYMBOL(ib_attach_mcast);
1205
1206 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1207 {
1208 int ret;
1209
1210 if (!qp->device->detach_mcast)
1211 return -ENOSYS;
1212 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1213 return -EINVAL;
1214
1215 ret = qp->device->detach_mcast(qp, gid, lid);
1216 if (!ret)
1217 atomic_dec(&qp->usecnt);
1218 return ret;
1219 }
1220 EXPORT_SYMBOL(ib_detach_mcast);
1221
1222 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1223 {
1224 struct ib_xrcd *xrcd;
1225
1226 if (!device->alloc_xrcd)
1227 return ERR_PTR(-ENOSYS);
1228
1229 xrcd = device->alloc_xrcd(device, NULL, NULL);
1230 if (!IS_ERR(xrcd)) {
1231 xrcd->device = device;
1232 xrcd->inode = NULL;
1233 atomic_set(&xrcd->usecnt, 0);
1234 mutex_init(&xrcd->tgt_qp_mutex);
1235 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1236 }
1237
1238 return xrcd;
1239 }
1240 EXPORT_SYMBOL(ib_alloc_xrcd);
1241
1242 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1243 {
1244 struct ib_qp *qp;
1245 int ret;
1246
1247 if (atomic_read(&xrcd->usecnt))
1248 return -EBUSY;
1249
1250 while (!list_empty(&xrcd->tgt_qp_list)) {
1251 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1252 ret = ib_destroy_qp(qp);
1253 if (ret)
1254 return ret;
1255 }
1256
1257 return xrcd->device->dealloc_xrcd(xrcd);
1258 }
1259 EXPORT_SYMBOL(ib_dealloc_xrcd);
1260
1261 struct ib_flow *ib_create_flow(struct ib_qp *qp,
1262 struct ib_flow_attr *flow_attr,
1263 int domain)
1264 {
1265 struct ib_flow *flow_id;
1266 if (!qp->device->create_flow)
1267 return ERR_PTR(-ENOSYS);
1268
1269 flow_id = qp->device->create_flow(qp, flow_attr, domain);
1270 if (!IS_ERR(flow_id))
1271 atomic_inc(&qp->usecnt);
1272 return flow_id;
1273 }
1274 EXPORT_SYMBOL(ib_create_flow);
1275
1276 int ib_destroy_flow(struct ib_flow *flow_id)
1277 {
1278 int err;
1279 struct ib_qp *qp = flow_id->qp;
1280
1281 err = qp->device->destroy_flow(flow_id);
1282 if (!err)
1283 atomic_dec(&qp->usecnt);
1284 return err;
1285 }
1286 EXPORT_SYMBOL(ib_destroy_flow);
Linux with added FPC-III support