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
ib_rate_to_mult(enum ib_rate rate)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
mult_to_ib_rate(int mult)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
ib_rate_to_mbps(enum ib_rate rate)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
rdma_node_get_transport(enum rdma_node_type node_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
rdma_port_get_link_layer(struct ib_device * device,u8 port_num)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
ib_alloc_pd(struct ib_device * device)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
ib_dealloc_pd(struct ib_pd * pd)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
ib_create_ah(struct ib_pd * pd,struct ib_ah_attr * ah_attr)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
ib_init_ah_from_wc(struct ib_device * device,u8 port_num,struct ib_wc * wc,struct ib_grh * grh,struct ib_ah_attr * ah_attr)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
ib_create_ah_from_wc(struct ib_pd * pd,struct ib_wc * wc,struct ib_grh * grh,u8 port_num)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
ib_modify_ah(struct ib_ah * ah,struct ib_ah_attr * ah_attr)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
ib_query_ah(struct ib_ah * ah,struct ib_ah_attr * ah_attr)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
ib_destroy_ah(struct ib_ah * ah)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
ib_create_srq(struct ib_pd * pd,struct ib_srq_init_attr * srq_init_attr)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
ib_modify_srq(struct ib_srq * srq,struct ib_srq_attr * srq_attr,enum ib_srq_attr_mask srq_attr_mask)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
ib_query_srq(struct ib_srq * srq,struct ib_srq_attr * srq_attr)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
ib_destroy_srq(struct ib_srq * srq)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
__ib_shared_qp_event_handler(struct ib_event * event,void * context)346 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
347 {
348 struct ib_qp *qp = context;
349
350 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
351 if (event->element.qp->event_handler)
352 event->element.qp->event_handler(event, event->element.qp->qp_context);
353 }
354
__ib_insert_xrcd_qp(struct ib_xrcd * xrcd,struct ib_qp * qp)355 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
356 {
357 mutex_lock(&xrcd->tgt_qp_mutex);
358 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
359 mutex_unlock(&xrcd->tgt_qp_mutex);
360 }
361
__ib_open_qp(struct ib_qp * real_qp,void (* event_handler)(struct ib_event *,void *),void * qp_context)362 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
363 void (*event_handler)(struct ib_event *, void *),
364 void *qp_context)
365 {
366 struct ib_qp *qp;
367 unsigned long flags;
368
369 qp = kzalloc(sizeof *qp, GFP_KERNEL);
370 if (!qp)
371 return ERR_PTR(-ENOMEM);
372
373 qp->real_qp = real_qp;
374 atomic_inc(&real_qp->usecnt);
375 qp->device = real_qp->device;
376 qp->event_handler = event_handler;
377 qp->qp_context = qp_context;
378 qp->qp_num = real_qp->qp_num;
379 qp->qp_type = real_qp->qp_type;
380
381 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
382 list_add(&qp->open_list, &real_qp->open_list);
383 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
384
385 return qp;
386 }
387
ib_open_qp(struct ib_xrcd * xrcd,struct ib_qp_open_attr * qp_open_attr)388 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
389 struct ib_qp_open_attr *qp_open_attr)
390 {
391 struct ib_qp *qp, *real_qp;
392
393 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
394 return ERR_PTR(-EINVAL);
395
396 qp = ERR_PTR(-EINVAL);
397 mutex_lock(&xrcd->tgt_qp_mutex);
398 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
399 if (real_qp->qp_num == qp_open_attr->qp_num) {
400 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
401 qp_open_attr->qp_context);
402 break;
403 }
404 }
405 mutex_unlock(&xrcd->tgt_qp_mutex);
406 return qp;
407 }
408 EXPORT_SYMBOL(ib_open_qp);
409
ib_create_qp(struct ib_pd * pd,struct ib_qp_init_attr * qp_init_attr)410 struct ib_qp *ib_create_qp(struct ib_pd *pd,
411 struct ib_qp_init_attr *qp_init_attr)
412 {
413 struct ib_qp *qp, *real_qp;
414 struct ib_device *device;
415
416 device = pd ? pd->device : qp_init_attr->xrcd->device;
417 qp = device->create_qp(pd, qp_init_attr, NULL);
418
419 if (!IS_ERR(qp)) {
420 qp->device = device;
421 qp->real_qp = qp;
422 qp->uobject = NULL;
423 qp->qp_type = qp_init_attr->qp_type;
424
425 atomic_set(&qp->usecnt, 0);
426 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
427 qp->event_handler = __ib_shared_qp_event_handler;
428 qp->qp_context = qp;
429 qp->pd = NULL;
430 qp->send_cq = qp->recv_cq = NULL;
431 qp->srq = NULL;
432 qp->xrcd = qp_init_attr->xrcd;
433 atomic_inc(&qp_init_attr->xrcd->usecnt);
434 INIT_LIST_HEAD(&qp->open_list);
435
436 real_qp = qp;
437 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
438 qp_init_attr->qp_context);
439 if (!IS_ERR(qp))
440 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
441 else
442 real_qp->device->destroy_qp(real_qp);
443 } else {
444 qp->event_handler = qp_init_attr->event_handler;
445 qp->qp_context = qp_init_attr->qp_context;
446 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
447 qp->recv_cq = NULL;
448 qp->srq = NULL;
449 } else {
450 qp->recv_cq = qp_init_attr->recv_cq;
451 atomic_inc(&qp_init_attr->recv_cq->usecnt);
452 qp->srq = qp_init_attr->srq;
453 if (qp->srq)
454 atomic_inc(&qp_init_attr->srq->usecnt);
455 }
456
457 qp->pd = pd;
458 qp->send_cq = qp_init_attr->send_cq;
459 qp->xrcd = NULL;
460
461 atomic_inc(&pd->usecnt);
462 atomic_inc(&qp_init_attr->send_cq->usecnt);
463 }
464 }
465
466 return qp;
467 }
468 EXPORT_SYMBOL(ib_create_qp);
469
470 static const struct {
471 int valid;
472 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
473 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
474 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
475 [IB_QPS_RESET] = {
476 [IB_QPS_RESET] = { .valid = 1 },
477 [IB_QPS_INIT] = {
478 .valid = 1,
479 .req_param = {
480 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
481 IB_QP_PORT |
482 IB_QP_QKEY),
483 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
484 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
485 IB_QP_PORT |
486 IB_QP_ACCESS_FLAGS),
487 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
488 IB_QP_PORT |
489 IB_QP_ACCESS_FLAGS),
490 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
491 IB_QP_PORT |
492 IB_QP_ACCESS_FLAGS),
493 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
494 IB_QP_PORT |
495 IB_QP_ACCESS_FLAGS),
496 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
497 IB_QP_QKEY),
498 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
499 IB_QP_QKEY),
500 }
501 },
502 },
503 [IB_QPS_INIT] = {
504 [IB_QPS_RESET] = { .valid = 1 },
505 [IB_QPS_ERR] = { .valid = 1 },
506 [IB_QPS_INIT] = {
507 .valid = 1,
508 .opt_param = {
509 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
510 IB_QP_PORT |
511 IB_QP_QKEY),
512 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
513 IB_QP_PORT |
514 IB_QP_ACCESS_FLAGS),
515 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
516 IB_QP_PORT |
517 IB_QP_ACCESS_FLAGS),
518 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
519 IB_QP_PORT |
520 IB_QP_ACCESS_FLAGS),
521 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
522 IB_QP_PORT |
523 IB_QP_ACCESS_FLAGS),
524 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
525 IB_QP_QKEY),
526 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
527 IB_QP_QKEY),
528 }
529 },
530 [IB_QPS_RTR] = {
531 .valid = 1,
532 .req_param = {
533 [IB_QPT_UC] = (IB_QP_AV |
534 IB_QP_PATH_MTU |
535 IB_QP_DEST_QPN |
536 IB_QP_RQ_PSN),
537 [IB_QPT_RC] = (IB_QP_AV |
538 IB_QP_PATH_MTU |
539 IB_QP_DEST_QPN |
540 IB_QP_RQ_PSN |
541 IB_QP_MAX_DEST_RD_ATOMIC |
542 IB_QP_MIN_RNR_TIMER),
543 [IB_QPT_XRC_INI] = (IB_QP_AV |
544 IB_QP_PATH_MTU |
545 IB_QP_DEST_QPN |
546 IB_QP_RQ_PSN),
547 [IB_QPT_XRC_TGT] = (IB_QP_AV |
548 IB_QP_PATH_MTU |
549 IB_QP_DEST_QPN |
550 IB_QP_RQ_PSN |
551 IB_QP_MAX_DEST_RD_ATOMIC |
552 IB_QP_MIN_RNR_TIMER),
553 },
554 .opt_param = {
555 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
556 IB_QP_QKEY),
557 [IB_QPT_UC] = (IB_QP_ALT_PATH |
558 IB_QP_ACCESS_FLAGS |
559 IB_QP_PKEY_INDEX),
560 [IB_QPT_RC] = (IB_QP_ALT_PATH |
561 IB_QP_ACCESS_FLAGS |
562 IB_QP_PKEY_INDEX),
563 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
564 IB_QP_ACCESS_FLAGS |
565 IB_QP_PKEY_INDEX),
566 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
567 IB_QP_ACCESS_FLAGS |
568 IB_QP_PKEY_INDEX),
569 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
570 IB_QP_QKEY),
571 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
572 IB_QP_QKEY),
573 }
574 }
575 },
576 [IB_QPS_RTR] = {
577 [IB_QPS_RESET] = { .valid = 1 },
578 [IB_QPS_ERR] = { .valid = 1 },
579 [IB_QPS_RTS] = {
580 .valid = 1,
581 .req_param = {
582 [IB_QPT_UD] = IB_QP_SQ_PSN,
583 [IB_QPT_UC] = IB_QP_SQ_PSN,
584 [IB_QPT_RC] = (IB_QP_TIMEOUT |
585 IB_QP_RETRY_CNT |
586 IB_QP_RNR_RETRY |
587 IB_QP_SQ_PSN |
588 IB_QP_MAX_QP_RD_ATOMIC),
589 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
590 IB_QP_RETRY_CNT |
591 IB_QP_RNR_RETRY |
592 IB_QP_SQ_PSN |
593 IB_QP_MAX_QP_RD_ATOMIC),
594 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
595 IB_QP_SQ_PSN),
596 [IB_QPT_SMI] = IB_QP_SQ_PSN,
597 [IB_QPT_GSI] = IB_QP_SQ_PSN,
598 },
599 .opt_param = {
600 [IB_QPT_UD] = (IB_QP_CUR_STATE |
601 IB_QP_QKEY),
602 [IB_QPT_UC] = (IB_QP_CUR_STATE |
603 IB_QP_ALT_PATH |
604 IB_QP_ACCESS_FLAGS |
605 IB_QP_PATH_MIG_STATE),
606 [IB_QPT_RC] = (IB_QP_CUR_STATE |
607 IB_QP_ALT_PATH |
608 IB_QP_ACCESS_FLAGS |
609 IB_QP_MIN_RNR_TIMER |
610 IB_QP_PATH_MIG_STATE),
611 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
612 IB_QP_ALT_PATH |
613 IB_QP_ACCESS_FLAGS |
614 IB_QP_PATH_MIG_STATE),
615 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
616 IB_QP_ALT_PATH |
617 IB_QP_ACCESS_FLAGS |
618 IB_QP_MIN_RNR_TIMER |
619 IB_QP_PATH_MIG_STATE),
620 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
621 IB_QP_QKEY),
622 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
623 IB_QP_QKEY),
624 }
625 }
626 },
627 [IB_QPS_RTS] = {
628 [IB_QPS_RESET] = { .valid = 1 },
629 [IB_QPS_ERR] = { .valid = 1 },
630 [IB_QPS_RTS] = {
631 .valid = 1,
632 .opt_param = {
633 [IB_QPT_UD] = (IB_QP_CUR_STATE |
634 IB_QP_QKEY),
635 [IB_QPT_UC] = (IB_QP_CUR_STATE |
636 IB_QP_ACCESS_FLAGS |
637 IB_QP_ALT_PATH |
638 IB_QP_PATH_MIG_STATE),
639 [IB_QPT_RC] = (IB_QP_CUR_STATE |
640 IB_QP_ACCESS_FLAGS |
641 IB_QP_ALT_PATH |
642 IB_QP_PATH_MIG_STATE |
643 IB_QP_MIN_RNR_TIMER),
644 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
645 IB_QP_ACCESS_FLAGS |
646 IB_QP_ALT_PATH |
647 IB_QP_PATH_MIG_STATE),
648 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
649 IB_QP_ACCESS_FLAGS |
650 IB_QP_ALT_PATH |
651 IB_QP_PATH_MIG_STATE |
652 IB_QP_MIN_RNR_TIMER),
653 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
654 IB_QP_QKEY),
655 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
656 IB_QP_QKEY),
657 }
658 },
659 [IB_QPS_SQD] = {
660 .valid = 1,
661 .opt_param = {
662 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
663 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
664 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
665 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
666 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
667 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
668 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
669 }
670 },
671 },
672 [IB_QPS_SQD] = {
673 [IB_QPS_RESET] = { .valid = 1 },
674 [IB_QPS_ERR] = { .valid = 1 },
675 [IB_QPS_RTS] = {
676 .valid = 1,
677 .opt_param = {
678 [IB_QPT_UD] = (IB_QP_CUR_STATE |
679 IB_QP_QKEY),
680 [IB_QPT_UC] = (IB_QP_CUR_STATE |
681 IB_QP_ALT_PATH |
682 IB_QP_ACCESS_FLAGS |
683 IB_QP_PATH_MIG_STATE),
684 [IB_QPT_RC] = (IB_QP_CUR_STATE |
685 IB_QP_ALT_PATH |
686 IB_QP_ACCESS_FLAGS |
687 IB_QP_MIN_RNR_TIMER |
688 IB_QP_PATH_MIG_STATE),
689 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
690 IB_QP_ALT_PATH |
691 IB_QP_ACCESS_FLAGS |
692 IB_QP_PATH_MIG_STATE),
693 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
694 IB_QP_ALT_PATH |
695 IB_QP_ACCESS_FLAGS |
696 IB_QP_MIN_RNR_TIMER |
697 IB_QP_PATH_MIG_STATE),
698 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
699 IB_QP_QKEY),
700 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
701 IB_QP_QKEY),
702 }
703 },
704 [IB_QPS_SQD] = {
705 .valid = 1,
706 .opt_param = {
707 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
708 IB_QP_QKEY),
709 [IB_QPT_UC] = (IB_QP_AV |
710 IB_QP_ALT_PATH |
711 IB_QP_ACCESS_FLAGS |
712 IB_QP_PKEY_INDEX |
713 IB_QP_PATH_MIG_STATE),
714 [IB_QPT_RC] = (IB_QP_PORT |
715 IB_QP_AV |
716 IB_QP_TIMEOUT |
717 IB_QP_RETRY_CNT |
718 IB_QP_RNR_RETRY |
719 IB_QP_MAX_QP_RD_ATOMIC |
720 IB_QP_MAX_DEST_RD_ATOMIC |
721 IB_QP_ALT_PATH |
722 IB_QP_ACCESS_FLAGS |
723 IB_QP_PKEY_INDEX |
724 IB_QP_MIN_RNR_TIMER |
725 IB_QP_PATH_MIG_STATE),
726 [IB_QPT_XRC_INI] = (IB_QP_PORT |
727 IB_QP_AV |
728 IB_QP_TIMEOUT |
729 IB_QP_RETRY_CNT |
730 IB_QP_RNR_RETRY |
731 IB_QP_MAX_QP_RD_ATOMIC |
732 IB_QP_ALT_PATH |
733 IB_QP_ACCESS_FLAGS |
734 IB_QP_PKEY_INDEX |
735 IB_QP_PATH_MIG_STATE),
736 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
737 IB_QP_AV |
738 IB_QP_TIMEOUT |
739 IB_QP_MAX_DEST_RD_ATOMIC |
740 IB_QP_ALT_PATH |
741 IB_QP_ACCESS_FLAGS |
742 IB_QP_PKEY_INDEX |
743 IB_QP_MIN_RNR_TIMER |
744 IB_QP_PATH_MIG_STATE),
745 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
746 IB_QP_QKEY),
747 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
748 IB_QP_QKEY),
749 }
750 }
751 },
752 [IB_QPS_SQE] = {
753 [IB_QPS_RESET] = { .valid = 1 },
754 [IB_QPS_ERR] = { .valid = 1 },
755 [IB_QPS_RTS] = {
756 .valid = 1,
757 .opt_param = {
758 [IB_QPT_UD] = (IB_QP_CUR_STATE |
759 IB_QP_QKEY),
760 [IB_QPT_UC] = (IB_QP_CUR_STATE |
761 IB_QP_ACCESS_FLAGS),
762 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
763 IB_QP_QKEY),
764 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
765 IB_QP_QKEY),
766 }
767 }
768 },
769 [IB_QPS_ERR] = {
770 [IB_QPS_RESET] = { .valid = 1 },
771 [IB_QPS_ERR] = { .valid = 1 }
772 }
773 };
774
ib_modify_qp_is_ok(enum ib_qp_state cur_state,enum ib_qp_state next_state,enum ib_qp_type type,enum ib_qp_attr_mask mask)775 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
776 enum ib_qp_type type, enum ib_qp_attr_mask mask)
777 {
778 enum ib_qp_attr_mask req_param, opt_param;
779
780 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
781 next_state < 0 || next_state > IB_QPS_ERR)
782 return 0;
783
784 if (mask & IB_QP_CUR_STATE &&
785 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
786 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
787 return 0;
788
789 if (!qp_state_table[cur_state][next_state].valid)
790 return 0;
791
792 req_param = qp_state_table[cur_state][next_state].req_param[type];
793 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
794
795 if ((mask & req_param) != req_param)
796 return 0;
797
798 if (mask & ~(req_param | opt_param | IB_QP_STATE))
799 return 0;
800
801 return 1;
802 }
803 EXPORT_SYMBOL(ib_modify_qp_is_ok);
804
ib_modify_qp(struct ib_qp * qp,struct ib_qp_attr * qp_attr,int qp_attr_mask)805 int ib_modify_qp(struct ib_qp *qp,
806 struct ib_qp_attr *qp_attr,
807 int qp_attr_mask)
808 {
809 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
810 }
811 EXPORT_SYMBOL(ib_modify_qp);
812
ib_query_qp(struct ib_qp * qp,struct ib_qp_attr * qp_attr,int qp_attr_mask,struct ib_qp_init_attr * qp_init_attr)813 int ib_query_qp(struct ib_qp *qp,
814 struct ib_qp_attr *qp_attr,
815 int qp_attr_mask,
816 struct ib_qp_init_attr *qp_init_attr)
817 {
818 return qp->device->query_qp ?
819 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
820 -ENOSYS;
821 }
822 EXPORT_SYMBOL(ib_query_qp);
823
ib_close_qp(struct ib_qp * qp)824 int ib_close_qp(struct ib_qp *qp)
825 {
826 struct ib_qp *real_qp;
827 unsigned long flags;
828
829 real_qp = qp->real_qp;
830 if (real_qp == qp)
831 return -EINVAL;
832
833 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
834 list_del(&qp->open_list);
835 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
836
837 atomic_dec(&real_qp->usecnt);
838 kfree(qp);
839
840 return 0;
841 }
842 EXPORT_SYMBOL(ib_close_qp);
843
__ib_destroy_shared_qp(struct ib_qp * qp)844 static int __ib_destroy_shared_qp(struct ib_qp *qp)
845 {
846 struct ib_xrcd *xrcd;
847 struct ib_qp *real_qp;
848 int ret;
849
850 real_qp = qp->real_qp;
851 xrcd = real_qp->xrcd;
852
853 mutex_lock(&xrcd->tgt_qp_mutex);
854 ib_close_qp(qp);
855 if (atomic_read(&real_qp->usecnt) == 0)
856 list_del(&real_qp->xrcd_list);
857 else
858 real_qp = NULL;
859 mutex_unlock(&xrcd->tgt_qp_mutex);
860
861 if (real_qp) {
862 ret = ib_destroy_qp(real_qp);
863 if (!ret)
864 atomic_dec(&xrcd->usecnt);
865 else
866 __ib_insert_xrcd_qp(xrcd, real_qp);
867 }
868
869 return 0;
870 }
871
ib_destroy_qp(struct ib_qp * qp)872 int ib_destroy_qp(struct ib_qp *qp)
873 {
874 struct ib_pd *pd;
875 struct ib_cq *scq, *rcq;
876 struct ib_srq *srq;
877 int ret;
878
879 if (atomic_read(&qp->usecnt))
880 return -EBUSY;
881
882 if (qp->real_qp != qp)
883 return __ib_destroy_shared_qp(qp);
884
885 pd = qp->pd;
886 scq = qp->send_cq;
887 rcq = qp->recv_cq;
888 srq = qp->srq;
889
890 ret = qp->device->destroy_qp(qp);
891 if (!ret) {
892 if (pd)
893 atomic_dec(&pd->usecnt);
894 if (scq)
895 atomic_dec(&scq->usecnt);
896 if (rcq)
897 atomic_dec(&rcq->usecnt);
898 if (srq)
899 atomic_dec(&srq->usecnt);
900 }
901
902 return ret;
903 }
904 EXPORT_SYMBOL(ib_destroy_qp);
905
906 /* Completion queues */
907
ib_create_cq(struct ib_device * device,ib_comp_handler comp_handler,void (* event_handler)(struct ib_event *,void *),void * cq_context,int cqe,int comp_vector)908 struct ib_cq *ib_create_cq(struct ib_device *device,
909 ib_comp_handler comp_handler,
910 void (*event_handler)(struct ib_event *, void *),
911 void *cq_context, int cqe, int comp_vector)
912 {
913 struct ib_cq *cq;
914
915 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
916
917 if (!IS_ERR(cq)) {
918 cq->device = device;
919 cq->uobject = NULL;
920 cq->comp_handler = comp_handler;
921 cq->event_handler = event_handler;
922 cq->cq_context = cq_context;
923 atomic_set(&cq->usecnt, 0);
924 }
925
926 return cq;
927 }
928 EXPORT_SYMBOL(ib_create_cq);
929
ib_modify_cq(struct ib_cq * cq,u16 cq_count,u16 cq_period)930 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
931 {
932 return cq->device->modify_cq ?
933 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
934 }
935 EXPORT_SYMBOL(ib_modify_cq);
936
ib_destroy_cq(struct ib_cq * cq)937 int ib_destroy_cq(struct ib_cq *cq)
938 {
939 if (atomic_read(&cq->usecnt))
940 return -EBUSY;
941
942 return cq->device->destroy_cq(cq);
943 }
944 EXPORT_SYMBOL(ib_destroy_cq);
945
ib_resize_cq(struct ib_cq * cq,int cqe)946 int ib_resize_cq(struct ib_cq *cq, int cqe)
947 {
948 return cq->device->resize_cq ?
949 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
950 }
951 EXPORT_SYMBOL(ib_resize_cq);
952
953 /* Memory regions */
954
ib_get_dma_mr(struct ib_pd * pd,int mr_access_flags)955 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
956 {
957 struct ib_mr *mr;
958
959 mr = pd->device->get_dma_mr(pd, mr_access_flags);
960
961 if (!IS_ERR(mr)) {
962 mr->device = pd->device;
963 mr->pd = pd;
964 mr->uobject = NULL;
965 atomic_inc(&pd->usecnt);
966 atomic_set(&mr->usecnt, 0);
967 }
968
969 return mr;
970 }
971 EXPORT_SYMBOL(ib_get_dma_mr);
972
ib_reg_phys_mr(struct ib_pd * pd,struct ib_phys_buf * phys_buf_array,int num_phys_buf,int mr_access_flags,u64 * iova_start)973 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
974 struct ib_phys_buf *phys_buf_array,
975 int num_phys_buf,
976 int mr_access_flags,
977 u64 *iova_start)
978 {
979 struct ib_mr *mr;
980
981 if (!pd->device->reg_phys_mr)
982 return ERR_PTR(-ENOSYS);
983
984 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
985 mr_access_flags, iova_start);
986
987 if (!IS_ERR(mr)) {
988 mr->device = pd->device;
989 mr->pd = pd;
990 mr->uobject = NULL;
991 atomic_inc(&pd->usecnt);
992 atomic_set(&mr->usecnt, 0);
993 }
994
995 return mr;
996 }
997 EXPORT_SYMBOL(ib_reg_phys_mr);
998
ib_rereg_phys_mr(struct ib_mr * mr,int mr_rereg_mask,struct ib_pd * pd,struct ib_phys_buf * phys_buf_array,int num_phys_buf,int mr_access_flags,u64 * iova_start)999 int ib_rereg_phys_mr(struct ib_mr *mr,
1000 int mr_rereg_mask,
1001 struct ib_pd *pd,
1002 struct ib_phys_buf *phys_buf_array,
1003 int num_phys_buf,
1004 int mr_access_flags,
1005 u64 *iova_start)
1006 {
1007 struct ib_pd *old_pd;
1008 int ret;
1009
1010 if (!mr->device->rereg_phys_mr)
1011 return -ENOSYS;
1012
1013 if (atomic_read(&mr->usecnt))
1014 return -EBUSY;
1015
1016 old_pd = mr->pd;
1017
1018 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
1019 phys_buf_array, num_phys_buf,
1020 mr_access_flags, iova_start);
1021
1022 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
1023 atomic_dec(&old_pd->usecnt);
1024 atomic_inc(&pd->usecnt);
1025 }
1026
1027 return ret;
1028 }
1029 EXPORT_SYMBOL(ib_rereg_phys_mr);
1030
ib_query_mr(struct ib_mr * mr,struct ib_mr_attr * mr_attr)1031 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
1032 {
1033 return mr->device->query_mr ?
1034 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
1035 }
1036 EXPORT_SYMBOL(ib_query_mr);
1037
ib_dereg_mr(struct ib_mr * mr)1038 int ib_dereg_mr(struct ib_mr *mr)
1039 {
1040 struct ib_pd *pd;
1041 int ret;
1042
1043 if (atomic_read(&mr->usecnt))
1044 return -EBUSY;
1045
1046 pd = mr->pd;
1047 ret = mr->device->dereg_mr(mr);
1048 if (!ret)
1049 atomic_dec(&pd->usecnt);
1050
1051 return ret;
1052 }
1053 EXPORT_SYMBOL(ib_dereg_mr);
1054
ib_alloc_fast_reg_mr(struct ib_pd * pd,int max_page_list_len)1055 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
1056 {
1057 struct ib_mr *mr;
1058
1059 if (!pd->device->alloc_fast_reg_mr)
1060 return ERR_PTR(-ENOSYS);
1061
1062 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len);
1063
1064 if (!IS_ERR(mr)) {
1065 mr->device = pd->device;
1066 mr->pd = pd;
1067 mr->uobject = NULL;
1068 atomic_inc(&pd->usecnt);
1069 atomic_set(&mr->usecnt, 0);
1070 }
1071
1072 return mr;
1073 }
1074 EXPORT_SYMBOL(ib_alloc_fast_reg_mr);
1075
ib_alloc_fast_reg_page_list(struct ib_device * device,int max_page_list_len)1076 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
1077 int max_page_list_len)
1078 {
1079 struct ib_fast_reg_page_list *page_list;
1080
1081 if (!device->alloc_fast_reg_page_list)
1082 return ERR_PTR(-ENOSYS);
1083
1084 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
1085
1086 if (!IS_ERR(page_list)) {
1087 page_list->device = device;
1088 page_list->max_page_list_len = max_page_list_len;
1089 }
1090
1091 return page_list;
1092 }
1093 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
1094
ib_free_fast_reg_page_list(struct ib_fast_reg_page_list * page_list)1095 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
1096 {
1097 page_list->device->free_fast_reg_page_list(page_list);
1098 }
1099 EXPORT_SYMBOL(ib_free_fast_reg_page_list);
1100
1101 /* Memory windows */
1102
ib_alloc_mw(struct ib_pd * pd,enum ib_mw_type type)1103 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
1104 {
1105 struct ib_mw *mw;
1106
1107 if (!pd->device->alloc_mw)
1108 return ERR_PTR(-ENOSYS);
1109
1110 mw = pd->device->alloc_mw(pd, type);
1111 if (!IS_ERR(mw)) {
1112 mw->device = pd->device;
1113 mw->pd = pd;
1114 mw->uobject = NULL;
1115 mw->type = type;
1116 atomic_inc(&pd->usecnt);
1117 }
1118
1119 return mw;
1120 }
1121 EXPORT_SYMBOL(ib_alloc_mw);
1122
ib_dealloc_mw(struct ib_mw * mw)1123 int ib_dealloc_mw(struct ib_mw *mw)
1124 {
1125 struct ib_pd *pd;
1126 int ret;
1127
1128 pd = mw->pd;
1129 ret = mw->device->dealloc_mw(mw);
1130 if (!ret)
1131 atomic_dec(&pd->usecnt);
1132
1133 return ret;
1134 }
1135 EXPORT_SYMBOL(ib_dealloc_mw);
1136
1137 /* "Fast" memory regions */
1138
ib_alloc_fmr(struct ib_pd * pd,int mr_access_flags,struct ib_fmr_attr * fmr_attr)1139 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1140 int mr_access_flags,
1141 struct ib_fmr_attr *fmr_attr)
1142 {
1143 struct ib_fmr *fmr;
1144
1145 if (!pd->device->alloc_fmr)
1146 return ERR_PTR(-ENOSYS);
1147
1148 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1149 if (!IS_ERR(fmr)) {
1150 fmr->device = pd->device;
1151 fmr->pd = pd;
1152 atomic_inc(&pd->usecnt);
1153 }
1154
1155 return fmr;
1156 }
1157 EXPORT_SYMBOL(ib_alloc_fmr);
1158
ib_unmap_fmr(struct list_head * fmr_list)1159 int ib_unmap_fmr(struct list_head *fmr_list)
1160 {
1161 struct ib_fmr *fmr;
1162
1163 if (list_empty(fmr_list))
1164 return 0;
1165
1166 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1167 return fmr->device->unmap_fmr(fmr_list);
1168 }
1169 EXPORT_SYMBOL(ib_unmap_fmr);
1170
ib_dealloc_fmr(struct ib_fmr * fmr)1171 int ib_dealloc_fmr(struct ib_fmr *fmr)
1172 {
1173 struct ib_pd *pd;
1174 int ret;
1175
1176 pd = fmr->pd;
1177 ret = fmr->device->dealloc_fmr(fmr);
1178 if (!ret)
1179 atomic_dec(&pd->usecnt);
1180
1181 return ret;
1182 }
1183 EXPORT_SYMBOL(ib_dealloc_fmr);
1184
1185 /* Multicast groups */
1186
ib_attach_mcast(struct ib_qp * qp,union ib_gid * gid,u16 lid)1187 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1188 {
1189 int ret;
1190
1191 if (!qp->device->attach_mcast)
1192 return -ENOSYS;
1193 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1194 return -EINVAL;
1195
1196 ret = qp->device->attach_mcast(qp, gid, lid);
1197 if (!ret)
1198 atomic_inc(&qp->usecnt);
1199 return ret;
1200 }
1201 EXPORT_SYMBOL(ib_attach_mcast);
1202
ib_detach_mcast(struct ib_qp * qp,union ib_gid * gid,u16 lid)1203 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1204 {
1205 int ret;
1206
1207 if (!qp->device->detach_mcast)
1208 return -ENOSYS;
1209 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1210 return -EINVAL;
1211
1212 ret = qp->device->detach_mcast(qp, gid, lid);
1213 if (!ret)
1214 atomic_dec(&qp->usecnt);
1215 return ret;
1216 }
1217 EXPORT_SYMBOL(ib_detach_mcast);
1218
ib_alloc_xrcd(struct ib_device * device)1219 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1220 {
1221 struct ib_xrcd *xrcd;
1222
1223 if (!device->alloc_xrcd)
1224 return ERR_PTR(-ENOSYS);
1225
1226 xrcd = device->alloc_xrcd(device, NULL, NULL);
1227 if (!IS_ERR(xrcd)) {
1228 xrcd->device = device;
1229 xrcd->inode = NULL;
1230 atomic_set(&xrcd->usecnt, 0);
1231 mutex_init(&xrcd->tgt_qp_mutex);
1232 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1233 }
1234
1235 return xrcd;
1236 }
1237 EXPORT_SYMBOL(ib_alloc_xrcd);
1238
ib_dealloc_xrcd(struct ib_xrcd * xrcd)1239 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1240 {
1241 struct ib_qp *qp;
1242 int ret;
1243
1244 if (atomic_read(&xrcd->usecnt))
1245 return -EBUSY;
1246
1247 while (!list_empty(&xrcd->tgt_qp_list)) {
1248 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1249 ret = ib_destroy_qp(qp);
1250 if (ret)
1251 return ret;
1252 }
1253
1254 return xrcd->device->dealloc_xrcd(xrcd);
1255 }
1256 EXPORT_SYMBOL(ib_dealloc_xrcd);
1257