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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/string.h>
42
43#include <rdma/ib_verbs.h>
44#include <rdma/ib_cache.h>
45
46int ib_rate_to_mult(enum ib_rate rate)
47{
48 switch (rate) {
49 case IB_RATE_2_5_GBPS: return 1;
50 case IB_RATE_5_GBPS: return 2;
51 case IB_RATE_10_GBPS: return 4;
52 case IB_RATE_20_GBPS: return 8;
53 case IB_RATE_30_GBPS: return 12;
54 case IB_RATE_40_GBPS: return 16;
55 case IB_RATE_60_GBPS: return 24;
56 case IB_RATE_80_GBPS: return 32;
57 case IB_RATE_120_GBPS: return 48;
58 default: return -1;
59 }
60}
61EXPORT_SYMBOL(ib_rate_to_mult);
62
63enum ib_rate mult_to_ib_rate(int mult)
64{
65 switch (mult) {
66 case 1: return IB_RATE_2_5_GBPS;
67 case 2: return IB_RATE_5_GBPS;
68 case 4: return IB_RATE_10_GBPS;
69 case 8: return IB_RATE_20_GBPS;
70 case 12: return IB_RATE_30_GBPS;
71 case 16: return IB_RATE_40_GBPS;
72 case 24: return IB_RATE_60_GBPS;
73 case 32: return IB_RATE_80_GBPS;
74 case 48: return IB_RATE_120_GBPS;
75 default: return IB_RATE_PORT_CURRENT;
76 }
77}
78EXPORT_SYMBOL(mult_to_ib_rate);
79
80enum rdma_transport_type
81rdma_node_get_transport(enum rdma_node_type node_type)
82{
83 switch (node_type) {
84 case RDMA_NODE_IB_CA:
85 case RDMA_NODE_IB_SWITCH:
86 case RDMA_NODE_IB_ROUTER:
87 return RDMA_TRANSPORT_IB;
88 case RDMA_NODE_RNIC:
89 return RDMA_TRANSPORT_IWARP;
90 default:
91 BUG();
92 return 0;
93 }
94}
95EXPORT_SYMBOL(rdma_node_get_transport);
96
97enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
98{
99 if (device->get_link_layer)
100 return device->get_link_layer(device, port_num);
101
102 switch (rdma_node_get_transport(device->node_type)) {
103 case RDMA_TRANSPORT_IB:
104 return IB_LINK_LAYER_INFINIBAND;
105 case RDMA_TRANSPORT_IWARP:
106 return IB_LINK_LAYER_ETHERNET;
107 default:
108 return IB_LINK_LAYER_UNSPECIFIED;
109 }
110}
111EXPORT_SYMBOL(rdma_port_get_link_layer);
112
113/* Protection domains */
114
115struct ib_pd *ib_alloc_pd(struct ib_device *device)
116{
117 struct ib_pd *pd;
118
119 pd = device->alloc_pd(device, NULL, NULL);
120
121 if (!IS_ERR(pd)) {
122 pd->device = device;
123 pd->uobject = NULL;
124 atomic_set(&pd->usecnt, 0);
125 }
126
127 return pd;
128}
129EXPORT_SYMBOL(ib_alloc_pd);
130
131int ib_dealloc_pd(struct ib_pd *pd)
132{
133 if (atomic_read(&pd->usecnt))
134 return -EBUSY;
135
136 return pd->device->dealloc_pd(pd);
137}
138EXPORT_SYMBOL(ib_dealloc_pd);
139
140/* Address handles */
141
142struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
143{
144 struct ib_ah *ah;
145
146 ah = pd->device->create_ah(pd, ah_attr);
147
148 if (!IS_ERR(ah)) {
149 ah->device = pd->device;
150 ah->pd = pd;
151 ah->uobject = NULL;
152 atomic_inc(&pd->usecnt);
153 }
154
155 return ah;
156}
157EXPORT_SYMBOL(ib_create_ah);
158
159int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
160 struct ib_grh *grh, struct ib_ah_attr *ah_attr)
161{
162 u32 flow_class;
163 u16 gid_index;
164 int ret;
165
166 memset(ah_attr, 0, sizeof *ah_attr);
167 ah_attr->dlid = wc->slid;
168 ah_attr->sl = wc->sl;
169 ah_attr->src_path_bits = wc->dlid_path_bits;
170 ah_attr->port_num = port_num;
171
172 if (wc->wc_flags & IB_WC_GRH) {
173 ah_attr->ah_flags = IB_AH_GRH;
174 ah_attr->grh.dgid = grh->sgid;
175
176 ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
177 &gid_index);
178 if (ret)
179 return ret;
180
181 ah_attr->grh.sgid_index = (u8) gid_index;
182 flow_class = be32_to_cpu(grh->version_tclass_flow);
183 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
184 ah_attr->grh.hop_limit = 0xFF;
185 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
186 }
187 return 0;
188}
189EXPORT_SYMBOL(ib_init_ah_from_wc);
190
191struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
192 struct ib_grh *grh, u8 port_num)
193{
194 struct ib_ah_attr ah_attr;
195 int ret;
196
197 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
198 if (ret)
199 return ERR_PTR(ret);
200
201 return ib_create_ah(pd, &ah_attr);
202}
203EXPORT_SYMBOL(ib_create_ah_from_wc);
204
205int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
206{
207 return ah->device->modify_ah ?
208 ah->device->modify_ah(ah, ah_attr) :
209 -ENOSYS;
210}
211EXPORT_SYMBOL(ib_modify_ah);
212
213int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
214{
215 return ah->device->query_ah ?
216 ah->device->query_ah(ah, ah_attr) :
217 -ENOSYS;
218}
219EXPORT_SYMBOL(ib_query_ah);
220
221int ib_destroy_ah(struct ib_ah *ah)
222{
223 struct ib_pd *pd;
224 int ret;
225
226 pd = ah->pd;
227 ret = ah->device->destroy_ah(ah);
228 if (!ret)
229 atomic_dec(&pd->usecnt);
230
231 return ret;
232}
233EXPORT_SYMBOL(ib_destroy_ah);
234
235/* Shared receive queues */
236
237struct ib_srq *ib_create_srq(struct ib_pd *pd,
238 struct ib_srq_init_attr *srq_init_attr)
239{
240 struct ib_srq *srq;
241
242 if (!pd->device->create_srq)
243 return ERR_PTR(-ENOSYS);
244
245 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
246
247 if (!IS_ERR(srq)) {
248 srq->device = pd->device;
249 srq->pd = pd;
250 srq->uobject = NULL;
251 srq->event_handler = srq_init_attr->event_handler;
252 srq->srq_context = srq_init_attr->srq_context;
253 atomic_inc(&pd->usecnt);
254 atomic_set(&srq->usecnt, 0);
255 }
256
257 return srq;
258}
259EXPORT_SYMBOL(ib_create_srq);
260
261int ib_modify_srq(struct ib_srq *srq,
262 struct ib_srq_attr *srq_attr,
263 enum ib_srq_attr_mask srq_attr_mask)
264{
265 return srq->device->modify_srq ?
266 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
267 -ENOSYS;
268}
269EXPORT_SYMBOL(ib_modify_srq);
270
271int ib_query_srq(struct ib_srq *srq,
272 struct ib_srq_attr *srq_attr)
273{
274 return srq->device->query_srq ?
275 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
276}
277EXPORT_SYMBOL(ib_query_srq);
278
279int ib_destroy_srq(struct ib_srq *srq)
280{
281 struct ib_pd *pd;
282 int ret;
283
284 if (atomic_read(&srq->usecnt))
285 return -EBUSY;
286
287 pd = srq->pd;
288
289 ret = srq->device->destroy_srq(srq);
290 if (!ret)
291 atomic_dec(&pd->usecnt);
292
293 return ret;
294}
295EXPORT_SYMBOL(ib_destroy_srq);
296
297/* Queue pairs */
298
299struct ib_qp *ib_create_qp(struct ib_pd *pd,
300 struct ib_qp_init_attr *qp_init_attr)
301{
302 struct ib_qp *qp;
303
304 qp = pd->device->create_qp(pd, qp_init_attr, NULL);
305
306 if (!IS_ERR(qp)) {
307 qp->device = pd->device;
308 qp->pd = pd;
309 qp->send_cq = qp_init_attr->send_cq;
310 qp->recv_cq = qp_init_attr->recv_cq;
311 qp->srq = qp_init_attr->srq;
312 qp->uobject = NULL;
313 qp->event_handler = qp_init_attr->event_handler;
314 qp->qp_context = qp_init_attr->qp_context;
315 qp->qp_type = qp_init_attr->qp_type;
316 atomic_inc(&pd->usecnt);
317 atomic_inc(&qp_init_attr->send_cq->usecnt);
318 atomic_inc(&qp_init_attr->recv_cq->usecnt);
319 if (qp_init_attr->srq)
320 atomic_inc(&qp_init_attr->srq->usecnt);
321 }
322
323 return qp;
324}
325EXPORT_SYMBOL(ib_create_qp);
326
327static const struct {
328 int valid;
329 enum ib_qp_attr_mask req_param[IB_QPT_RAW_ETHERTYPE + 1];
330 enum ib_qp_attr_mask opt_param[IB_QPT_RAW_ETHERTYPE + 1];
331} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
332 [IB_QPS_RESET] = {
333 [IB_QPS_RESET] = { .valid = 1 },
334 [IB_QPS_INIT] = {
335 .valid = 1,
336 .req_param = {
337 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
338 IB_QP_PORT |
339 IB_QP_QKEY),
340 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
341 IB_QP_PORT |
342 IB_QP_ACCESS_FLAGS),
343 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
344 IB_QP_PORT |
345 IB_QP_ACCESS_FLAGS),
346 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
347 IB_QP_QKEY),
348 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
349 IB_QP_QKEY),
350 }
351 },
352 },
353 [IB_QPS_INIT] = {
354 [IB_QPS_RESET] = { .valid = 1 },
355 [IB_QPS_ERR] = { .valid = 1 },
356 [IB_QPS_INIT] = {
357 .valid = 1,
358 .opt_param = {
359 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
360 IB_QP_PORT |
361 IB_QP_QKEY),
362 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
363 IB_QP_PORT |
364 IB_QP_ACCESS_FLAGS),
365 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
366 IB_QP_PORT |
367 IB_QP_ACCESS_FLAGS),
368 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
369 IB_QP_QKEY),
370 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
371 IB_QP_QKEY),
372 }
373 },
374 [IB_QPS_RTR] = {
375 .valid = 1,
376 .req_param = {
377 [IB_QPT_UC] = (IB_QP_AV |
378 IB_QP_PATH_MTU |
379 IB_QP_DEST_QPN |
380 IB_QP_RQ_PSN),
381 [IB_QPT_RC] = (IB_QP_AV |
382 IB_QP_PATH_MTU |
383 IB_QP_DEST_QPN |
384 IB_QP_RQ_PSN |
385 IB_QP_MAX_DEST_RD_ATOMIC |
386 IB_QP_MIN_RNR_TIMER),
387 },
388 .opt_param = {
389 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
390 IB_QP_QKEY),
391 [IB_QPT_UC] = (IB_QP_ALT_PATH |
392 IB_QP_ACCESS_FLAGS |
393 IB_QP_PKEY_INDEX),
394 [IB_QPT_RC] = (IB_QP_ALT_PATH |
395 IB_QP_ACCESS_FLAGS |
396 IB_QP_PKEY_INDEX),
397 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
398 IB_QP_QKEY),
399 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
400 IB_QP_QKEY),
401 }
402 }
403 },
404 [IB_QPS_RTR] = {
405 [IB_QPS_RESET] = { .valid = 1 },
406 [IB_QPS_ERR] = { .valid = 1 },
407 [IB_QPS_RTS] = {
408 .valid = 1,
409 .req_param = {
410 [IB_QPT_UD] = IB_QP_SQ_PSN,
411 [IB_QPT_UC] = IB_QP_SQ_PSN,
412 [IB_QPT_RC] = (IB_QP_TIMEOUT |
413 IB_QP_RETRY_CNT |
414 IB_QP_RNR_RETRY |
415 IB_QP_SQ_PSN |
416 IB_QP_MAX_QP_RD_ATOMIC),
417 [IB_QPT_SMI] = IB_QP_SQ_PSN,
418 [IB_QPT_GSI] = IB_QP_SQ_PSN,
419 },
420 .opt_param = {
421 [IB_QPT_UD] = (IB_QP_CUR_STATE |
422 IB_QP_QKEY),
423 [IB_QPT_UC] = (IB_QP_CUR_STATE |
424 IB_QP_ALT_PATH |
425 IB_QP_ACCESS_FLAGS |
426 IB_QP_PATH_MIG_STATE),
427 [IB_QPT_RC] = (IB_QP_CUR_STATE |
428 IB_QP_ALT_PATH |
429 IB_QP_ACCESS_FLAGS |
430 IB_QP_MIN_RNR_TIMER |
431 IB_QP_PATH_MIG_STATE),
432 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
433 IB_QP_QKEY),
434 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
435 IB_QP_QKEY),
436 }
437 }
438 },
439 [IB_QPS_RTS] = {
440 [IB_QPS_RESET] = { .valid = 1 },
441 [IB_QPS_ERR] = { .valid = 1 },
442 [IB_QPS_RTS] = {
443 .valid = 1,
444 .opt_param = {
445 [IB_QPT_UD] = (IB_QP_CUR_STATE |
446 IB_QP_QKEY),
447 [IB_QPT_UC] = (IB_QP_CUR_STATE |
448 IB_QP_ACCESS_FLAGS |
449 IB_QP_ALT_PATH |
450 IB_QP_PATH_MIG_STATE),
451 [IB_QPT_RC] = (IB_QP_CUR_STATE |
452 IB_QP_ACCESS_FLAGS |
453 IB_QP_ALT_PATH |
454 IB_QP_PATH_MIG_STATE |
455 IB_QP_MIN_RNR_TIMER),
456 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
457 IB_QP_QKEY),
458 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
459 IB_QP_QKEY),
460 }
461 },
462 [IB_QPS_SQD] = {
463 .valid = 1,
464 .opt_param = {
465 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
466 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
467 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
468 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
469 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
470 }
471 },
472 },
473 [IB_QPS_SQD] = {
474 [IB_QPS_RESET] = { .valid = 1 },
475 [IB_QPS_ERR] = { .valid = 1 },
476 [IB_QPS_RTS] = {
477 .valid = 1,
478 .opt_param = {
479 [IB_QPT_UD] = (IB_QP_CUR_STATE |
480 IB_QP_QKEY),
481 [IB_QPT_UC] = (IB_QP_CUR_STATE |
482 IB_QP_ALT_PATH |
483 IB_QP_ACCESS_FLAGS |
484 IB_QP_PATH_MIG_STATE),
485 [IB_QPT_RC] = (IB_QP_CUR_STATE |
486 IB_QP_ALT_PATH |
487 IB_QP_ACCESS_FLAGS |
488 IB_QP_MIN_RNR_TIMER |
489 IB_QP_PATH_MIG_STATE),
490 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
491 IB_QP_QKEY),
492 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
493 IB_QP_QKEY),
494 }
495 },
496 [IB_QPS_SQD] = {
497 .valid = 1,
498 .opt_param = {
499 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
500 IB_QP_QKEY),
501 [IB_QPT_UC] = (IB_QP_AV |
502 IB_QP_ALT_PATH |
503 IB_QP_ACCESS_FLAGS |
504 IB_QP_PKEY_INDEX |
505 IB_QP_PATH_MIG_STATE),
506 [IB_QPT_RC] = (IB_QP_PORT |
507 IB_QP_AV |
508 IB_QP_TIMEOUT |
509 IB_QP_RETRY_CNT |
510 IB_QP_RNR_RETRY |
511 IB_QP_MAX_QP_RD_ATOMIC |
512 IB_QP_MAX_DEST_RD_ATOMIC |
513 IB_QP_ALT_PATH |
514 IB_QP_ACCESS_FLAGS |
515 IB_QP_PKEY_INDEX |
516 IB_QP_MIN_RNR_TIMER |
517 IB_QP_PATH_MIG_STATE),
518 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
519 IB_QP_QKEY),
520 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
521 IB_QP_QKEY),
522 }
523 }
524 },
525 [IB_QPS_SQE] = {
526 [IB_QPS_RESET] = { .valid = 1 },
527 [IB_QPS_ERR] = { .valid = 1 },
528 [IB_QPS_RTS] = {
529 .valid = 1,
530 .opt_param = {
531 [IB_QPT_UD] = (IB_QP_CUR_STATE |
532 IB_QP_QKEY),
533 [IB_QPT_UC] = (IB_QP_CUR_STATE |
534 IB_QP_ACCESS_FLAGS),
535 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
536 IB_QP_QKEY),
537 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
538 IB_QP_QKEY),
539 }
540 }
541 },
542 [IB_QPS_ERR] = {
543 [IB_QPS_RESET] = { .valid = 1 },
544 [IB_QPS_ERR] = { .valid = 1 }
545 }
546};
547
548int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
549 enum ib_qp_type type, enum ib_qp_attr_mask mask)
550{
551 enum ib_qp_attr_mask req_param, opt_param;
552
553 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
554 next_state < 0 || next_state > IB_QPS_ERR)
555 return 0;
556
557 if (mask & IB_QP_CUR_STATE &&
558 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
559 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
560 return 0;
561
562 if (!qp_state_table[cur_state][next_state].valid)
563 return 0;
564
565 req_param = qp_state_table[cur_state][next_state].req_param[type];
566 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
567
568 if ((mask & req_param) != req_param)
569 return 0;
570
571 if (mask & ~(req_param | opt_param | IB_QP_STATE))
572 return 0;
573
574 return 1;
575}
576EXPORT_SYMBOL(ib_modify_qp_is_ok);
577
578int ib_modify_qp(struct ib_qp *qp,
579 struct ib_qp_attr *qp_attr,
580 int qp_attr_mask)
581{
582 return qp->device->modify_qp(qp, qp_attr, qp_attr_mask, NULL);
583}
584EXPORT_SYMBOL(ib_modify_qp);
585
586int ib_query_qp(struct ib_qp *qp,
587 struct ib_qp_attr *qp_attr,
588 int qp_attr_mask,
589 struct ib_qp_init_attr *qp_init_attr)
590{
591 return qp->device->query_qp ?
592 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) :
593 -ENOSYS;
594}
595EXPORT_SYMBOL(ib_query_qp);
596
597int ib_destroy_qp(struct ib_qp *qp)
598{
599 struct ib_pd *pd;
600 struct ib_cq *scq, *rcq;
601 struct ib_srq *srq;
602 int ret;
603
604 pd = qp->pd;
605 scq = qp->send_cq;
606 rcq = qp->recv_cq;
607 srq = qp->srq;
608
609 ret = qp->device->destroy_qp(qp);
610 if (!ret) {
611 atomic_dec(&pd->usecnt);
612 atomic_dec(&scq->usecnt);
613 atomic_dec(&rcq->usecnt);
614 if (srq)
615 atomic_dec(&srq->usecnt);
616 }
617
618 return ret;
619}
620EXPORT_SYMBOL(ib_destroy_qp);
621
622/* Completion queues */
623
624struct ib_cq *ib_create_cq(struct ib_device *device,
625 ib_comp_handler comp_handler,
626 void (*event_handler)(struct ib_event *, void *),
627 void *cq_context, int cqe, int comp_vector)
628{
629 struct ib_cq *cq;
630
631 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
632
633 if (!IS_ERR(cq)) {
634 cq->device = device;
635 cq->uobject = NULL;
636 cq->comp_handler = comp_handler;
637 cq->event_handler = event_handler;
638 cq->cq_context = cq_context;
639 atomic_set(&cq->usecnt, 0);
640 }
641
642 return cq;
643}
644EXPORT_SYMBOL(ib_create_cq);
645
646int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
647{
648 return cq->device->modify_cq ?
649 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
650}
651EXPORT_SYMBOL(ib_modify_cq);
652
653int ib_destroy_cq(struct ib_cq *cq)
654{
655 if (atomic_read(&cq->usecnt))
656 return -EBUSY;
657
658 return cq->device->destroy_cq(cq);
659}
660EXPORT_SYMBOL(ib_destroy_cq);
661
662int ib_resize_cq(struct ib_cq *cq, int cqe)
663{
664 return cq->device->resize_cq ?
665 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
666}
667EXPORT_SYMBOL(ib_resize_cq);
668
669/* Memory regions */
670
671struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
672{
673 struct ib_mr *mr;
674
675 mr = pd->device->get_dma_mr(pd, mr_access_flags);
676
677 if (!IS_ERR(mr)) {
678 mr->device = pd->device;
679 mr->pd = pd;
680 mr->uobject = NULL;
681 atomic_inc(&pd->usecnt);
682 atomic_set(&mr->usecnt, 0);
683 }
684
685 return mr;
686}
687EXPORT_SYMBOL(ib_get_dma_mr);
688
689struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
690 struct ib_phys_buf *phys_buf_array,
691 int num_phys_buf,
692 int mr_access_flags,
693 u64 *iova_start)
694{
695 struct ib_mr *mr;
696
697 if (!pd->device->reg_phys_mr)
698 return ERR_PTR(-ENOSYS);
699
700 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
701 mr_access_flags, iova_start);
702
703 if (!IS_ERR(mr)) {
704 mr->device = pd->device;
705 mr->pd = pd;
706 mr->uobject = NULL;
707 atomic_inc(&pd->usecnt);
708 atomic_set(&mr->usecnt, 0);
709 }
710
711 return mr;
712}
713EXPORT_SYMBOL(ib_reg_phys_mr);
714
715int ib_rereg_phys_mr(struct ib_mr *mr,
716 int mr_rereg_mask,
717 struct ib_pd *pd,
718 struct ib_phys_buf *phys_buf_array,
719 int num_phys_buf,
720 int mr_access_flags,
721 u64 *iova_start)
722{
723 struct ib_pd *old_pd;
724 int ret;
725
726 if (!mr->device->rereg_phys_mr)
727 return -ENOSYS;
728
729 if (atomic_read(&mr->usecnt))
730 return -EBUSY;
731
732 old_pd = mr->pd;
733
734 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
735 phys_buf_array, num_phys_buf,
736 mr_access_flags, iova_start);
737
738 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
739 atomic_dec(&old_pd->usecnt);
740 atomic_inc(&pd->usecnt);
741 }
742
743 return ret;
744}
745EXPORT_SYMBOL(ib_rereg_phys_mr);
746
747int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
748{
749 return mr->device->query_mr ?
750 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
751}
752EXPORT_SYMBOL(ib_query_mr);
753
754int ib_dereg_mr(struct ib_mr *mr)
755{
756 struct ib_pd *pd;
757 int ret;
758
759 if (atomic_read(&mr->usecnt))
760 return -EBUSY;
761
762 pd = mr->pd;
763 ret = mr->device->dereg_mr(mr);
764 if (!ret)
765 atomic_dec(&pd->usecnt);
766
767 return ret;
768}
769EXPORT_SYMBOL(ib_dereg_mr);
770
771struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
772{
773 struct ib_mr *mr;
774
775 if (!pd->device->alloc_fast_reg_mr)
776 return ERR_PTR(-ENOSYS);
777
778 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len);
779
780 if (!IS_ERR(mr)) {
781 mr->device = pd->device;
782 mr->pd = pd;
783 mr->uobject = NULL;
784 atomic_inc(&pd->usecnt);
785 atomic_set(&mr->usecnt, 0);
786 }
787
788 return mr;
789}
790EXPORT_SYMBOL(ib_alloc_fast_reg_mr);
791
792struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
793 int max_page_list_len)
794{
795 struct ib_fast_reg_page_list *page_list;
796
797 if (!device->alloc_fast_reg_page_list)
798 return ERR_PTR(-ENOSYS);
799
800 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
801
802 if (!IS_ERR(page_list)) {
803 page_list->device = device;
804 page_list->max_page_list_len = max_page_list_len;
805 }
806
807 return page_list;
808}
809EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
810
811void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
812{
813 page_list->device->free_fast_reg_page_list(page_list);
814}
815EXPORT_SYMBOL(ib_free_fast_reg_page_list);
816
817/* Memory windows */
818
819struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
820{
821 struct ib_mw *mw;
822
823 if (!pd->device->alloc_mw)
824 return ERR_PTR(-ENOSYS);
825
826 mw = pd->device->alloc_mw(pd);
827 if (!IS_ERR(mw)) {
828 mw->device = pd->device;
829 mw->pd = pd;
830 mw->uobject = NULL;
831 atomic_inc(&pd->usecnt);
832 }
833
834 return mw;
835}
836EXPORT_SYMBOL(ib_alloc_mw);
837
838int ib_dealloc_mw(struct ib_mw *mw)
839{
840 struct ib_pd *pd;
841 int ret;
842
843 pd = mw->pd;
844 ret = mw->device->dealloc_mw(mw);
845 if (!ret)
846 atomic_dec(&pd->usecnt);
847
848 return ret;
849}
850EXPORT_SYMBOL(ib_dealloc_mw);
851
852/* "Fast" memory regions */
853
854struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
855 int mr_access_flags,
856 struct ib_fmr_attr *fmr_attr)
857{
858 struct ib_fmr *fmr;
859
860 if (!pd->device->alloc_fmr)
861 return ERR_PTR(-ENOSYS);
862
863 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
864 if (!IS_ERR(fmr)) {
865 fmr->device = pd->device;
866 fmr->pd = pd;
867 atomic_inc(&pd->usecnt);
868 }
869
870 return fmr;
871}
872EXPORT_SYMBOL(ib_alloc_fmr);
873
874int ib_unmap_fmr(struct list_head *fmr_list)
875{
876 struct ib_fmr *fmr;
877
878 if (list_empty(fmr_list))
879 return 0;
880
881 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
882 return fmr->device->unmap_fmr(fmr_list);
883}
884EXPORT_SYMBOL(ib_unmap_fmr);
885
886int ib_dealloc_fmr(struct ib_fmr *fmr)
887{
888 struct ib_pd *pd;
889 int ret;
890
891 pd = fmr->pd;
892 ret = fmr->device->dealloc_fmr(fmr);
893 if (!ret)
894 atomic_dec(&pd->usecnt);
895
896 return ret;
897}
898EXPORT_SYMBOL(ib_dealloc_fmr);
899
900/* Multicast groups */
901
902int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
903{
904 if (!qp->device->attach_mcast)
905 return -ENOSYS;
906 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
907 return -EINVAL;
908
909 return qp->device->attach_mcast(qp, gid, lid);
910}
911EXPORT_SYMBOL(ib_attach_mcast);
912
913int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
914{
915 if (!qp->device->detach_mcast)
916 return -ENOSYS;
917 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
918 return -EINVAL;
919
920 return qp->device->detach_mcast(qp, gid, lid);
921}
922EXPORT_SYMBOL(ib_detach_mcast);
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#include <linux/in.h>
45#include <linux/in6.h>
46#include <net/addrconf.h>
47#include <linux/security.h>
48
49#include <rdma/ib_verbs.h>
50#include <rdma/ib_cache.h>
51#include <rdma/ib_addr.h>
52#include <rdma/rw.h>
53#include <rdma/lag.h>
54
55#include "core_priv.h"
56#include <trace/events/rdma_core.h>
57
58static int ib_resolve_eth_dmac(struct ib_device *device,
59 struct rdma_ah_attr *ah_attr);
60
61static const char * const ib_events[] = {
62 [IB_EVENT_CQ_ERR] = "CQ error",
63 [IB_EVENT_QP_FATAL] = "QP fatal error",
64 [IB_EVENT_QP_REQ_ERR] = "QP request error",
65 [IB_EVENT_QP_ACCESS_ERR] = "QP access error",
66 [IB_EVENT_COMM_EST] = "communication established",
67 [IB_EVENT_SQ_DRAINED] = "send queue drained",
68 [IB_EVENT_PATH_MIG] = "path migration successful",
69 [IB_EVENT_PATH_MIG_ERR] = "path migration error",
70 [IB_EVENT_DEVICE_FATAL] = "device fatal error",
71 [IB_EVENT_PORT_ACTIVE] = "port active",
72 [IB_EVENT_PORT_ERR] = "port error",
73 [IB_EVENT_LID_CHANGE] = "LID change",
74 [IB_EVENT_PKEY_CHANGE] = "P_key change",
75 [IB_EVENT_SM_CHANGE] = "SM change",
76 [IB_EVENT_SRQ_ERR] = "SRQ error",
77 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",
78 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",
79 [IB_EVENT_CLIENT_REREGISTER] = "client reregister",
80 [IB_EVENT_GID_CHANGE] = "GID changed",
81};
82
83const char *__attribute_const__ ib_event_msg(enum ib_event_type event)
84{
85 size_t index = event;
86
87 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
88 ib_events[index] : "unrecognized event";
89}
90EXPORT_SYMBOL(ib_event_msg);
91
92static const char * const wc_statuses[] = {
93 [IB_WC_SUCCESS] = "success",
94 [IB_WC_LOC_LEN_ERR] = "local length error",
95 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error",
96 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",
97 [IB_WC_LOC_PROT_ERR] = "local protection error",
98 [IB_WC_WR_FLUSH_ERR] = "WR flushed",
99 [IB_WC_MW_BIND_ERR] = "memory bind operation error",
100 [IB_WC_BAD_RESP_ERR] = "bad response error",
101 [IB_WC_LOC_ACCESS_ERR] = "local access error",
102 [IB_WC_REM_INV_REQ_ERR] = "remote invalid request error",
103 [IB_WC_REM_ACCESS_ERR] = "remote access error",
104 [IB_WC_REM_OP_ERR] = "remote operation error",
105 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",
106 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",
107 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",
108 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",
109 [IB_WC_REM_ABORT_ERR] = "operation aborted",
110 [IB_WC_INV_EECN_ERR] = "invalid EE context number",
111 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",
112 [IB_WC_FATAL_ERR] = "fatal error",
113 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",
114 [IB_WC_GENERAL_ERR] = "general error",
115};
116
117const char *__attribute_const__ ib_wc_status_msg(enum ib_wc_status status)
118{
119 size_t index = status;
120
121 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
122 wc_statuses[index] : "unrecognized status";
123}
124EXPORT_SYMBOL(ib_wc_status_msg);
125
126__attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
127{
128 switch (rate) {
129 case IB_RATE_2_5_GBPS: return 1;
130 case IB_RATE_5_GBPS: return 2;
131 case IB_RATE_10_GBPS: return 4;
132 case IB_RATE_20_GBPS: return 8;
133 case IB_RATE_30_GBPS: return 12;
134 case IB_RATE_40_GBPS: return 16;
135 case IB_RATE_60_GBPS: return 24;
136 case IB_RATE_80_GBPS: return 32;
137 case IB_RATE_120_GBPS: return 48;
138 case IB_RATE_14_GBPS: return 6;
139 case IB_RATE_56_GBPS: return 22;
140 case IB_RATE_112_GBPS: return 45;
141 case IB_RATE_168_GBPS: return 67;
142 case IB_RATE_25_GBPS: return 10;
143 case IB_RATE_100_GBPS: return 40;
144 case IB_RATE_200_GBPS: return 80;
145 case IB_RATE_300_GBPS: return 120;
146 case IB_RATE_28_GBPS: return 11;
147 case IB_RATE_50_GBPS: return 20;
148 case IB_RATE_400_GBPS: return 160;
149 case IB_RATE_600_GBPS: return 240;
150 default: return -1;
151 }
152}
153EXPORT_SYMBOL(ib_rate_to_mult);
154
155__attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
156{
157 switch (mult) {
158 case 1: return IB_RATE_2_5_GBPS;
159 case 2: return IB_RATE_5_GBPS;
160 case 4: return IB_RATE_10_GBPS;
161 case 8: return IB_RATE_20_GBPS;
162 case 12: return IB_RATE_30_GBPS;
163 case 16: return IB_RATE_40_GBPS;
164 case 24: return IB_RATE_60_GBPS;
165 case 32: return IB_RATE_80_GBPS;
166 case 48: return IB_RATE_120_GBPS;
167 case 6: return IB_RATE_14_GBPS;
168 case 22: return IB_RATE_56_GBPS;
169 case 45: return IB_RATE_112_GBPS;
170 case 67: return IB_RATE_168_GBPS;
171 case 10: return IB_RATE_25_GBPS;
172 case 40: return IB_RATE_100_GBPS;
173 case 80: return IB_RATE_200_GBPS;
174 case 120: return IB_RATE_300_GBPS;
175 case 11: return IB_RATE_28_GBPS;
176 case 20: return IB_RATE_50_GBPS;
177 case 160: return IB_RATE_400_GBPS;
178 case 240: return IB_RATE_600_GBPS;
179 default: return IB_RATE_PORT_CURRENT;
180 }
181}
182EXPORT_SYMBOL(mult_to_ib_rate);
183
184__attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
185{
186 switch (rate) {
187 case IB_RATE_2_5_GBPS: return 2500;
188 case IB_RATE_5_GBPS: return 5000;
189 case IB_RATE_10_GBPS: return 10000;
190 case IB_RATE_20_GBPS: return 20000;
191 case IB_RATE_30_GBPS: return 30000;
192 case IB_RATE_40_GBPS: return 40000;
193 case IB_RATE_60_GBPS: return 60000;
194 case IB_RATE_80_GBPS: return 80000;
195 case IB_RATE_120_GBPS: return 120000;
196 case IB_RATE_14_GBPS: return 14062;
197 case IB_RATE_56_GBPS: return 56250;
198 case IB_RATE_112_GBPS: return 112500;
199 case IB_RATE_168_GBPS: return 168750;
200 case IB_RATE_25_GBPS: return 25781;
201 case IB_RATE_100_GBPS: return 103125;
202 case IB_RATE_200_GBPS: return 206250;
203 case IB_RATE_300_GBPS: return 309375;
204 case IB_RATE_28_GBPS: return 28125;
205 case IB_RATE_50_GBPS: return 53125;
206 case IB_RATE_400_GBPS: return 425000;
207 case IB_RATE_600_GBPS: return 637500;
208 default: return -1;
209 }
210}
211EXPORT_SYMBOL(ib_rate_to_mbps);
212
213__attribute_const__ enum rdma_transport_type
214rdma_node_get_transport(unsigned int node_type)
215{
216
217 if (node_type == RDMA_NODE_USNIC)
218 return RDMA_TRANSPORT_USNIC;
219 if (node_type == RDMA_NODE_USNIC_UDP)
220 return RDMA_TRANSPORT_USNIC_UDP;
221 if (node_type == RDMA_NODE_RNIC)
222 return RDMA_TRANSPORT_IWARP;
223 if (node_type == RDMA_NODE_UNSPECIFIED)
224 return RDMA_TRANSPORT_UNSPECIFIED;
225
226 return RDMA_TRANSPORT_IB;
227}
228EXPORT_SYMBOL(rdma_node_get_transport);
229
230enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
231 u32 port_num)
232{
233 enum rdma_transport_type lt;
234 if (device->ops.get_link_layer)
235 return device->ops.get_link_layer(device, port_num);
236
237 lt = rdma_node_get_transport(device->node_type);
238 if (lt == RDMA_TRANSPORT_IB)
239 return IB_LINK_LAYER_INFINIBAND;
240
241 return IB_LINK_LAYER_ETHERNET;
242}
243EXPORT_SYMBOL(rdma_port_get_link_layer);
244
245/* Protection domains */
246
247/**
248 * __ib_alloc_pd - Allocates an unused protection domain.
249 * @device: The device on which to allocate the protection domain.
250 * @flags: protection domain flags
251 * @caller: caller's build-time module name
252 *
253 * A protection domain object provides an association between QPs, shared
254 * receive queues, address handles, memory regions, and memory windows.
255 *
256 * Every PD has a local_dma_lkey which can be used as the lkey value for local
257 * memory operations.
258 */
259struct ib_pd *__ib_alloc_pd(struct ib_device *device, unsigned int flags,
260 const char *caller)
261{
262 struct ib_pd *pd;
263 int mr_access_flags = 0;
264 int ret;
265
266 pd = rdma_zalloc_drv_obj(device, ib_pd);
267 if (!pd)
268 return ERR_PTR(-ENOMEM);
269
270 pd->device = device;
271 pd->uobject = NULL;
272 pd->__internal_mr = NULL;
273 atomic_set(&pd->usecnt, 0);
274 pd->flags = flags;
275
276 rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD);
277 rdma_restrack_set_name(&pd->res, caller);
278
279 ret = device->ops.alloc_pd(pd, NULL);
280 if (ret) {
281 rdma_restrack_put(&pd->res);
282 kfree(pd);
283 return ERR_PTR(ret);
284 }
285 rdma_restrack_add(&pd->res);
286
287 if (device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)
288 pd->local_dma_lkey = device->local_dma_lkey;
289 else
290 mr_access_flags |= IB_ACCESS_LOCAL_WRITE;
291
292 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY) {
293 pr_warn("%s: enabling unsafe global rkey\n", caller);
294 mr_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE;
295 }
296
297 if (mr_access_flags) {
298 struct ib_mr *mr;
299
300 mr = pd->device->ops.get_dma_mr(pd, mr_access_flags);
301 if (IS_ERR(mr)) {
302 ib_dealloc_pd(pd);
303 return ERR_CAST(mr);
304 }
305
306 mr->device = pd->device;
307 mr->pd = pd;
308 mr->type = IB_MR_TYPE_DMA;
309 mr->uobject = NULL;
310 mr->need_inval = false;
311
312 pd->__internal_mr = mr;
313
314 if (!(device->attrs.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY))
315 pd->local_dma_lkey = pd->__internal_mr->lkey;
316
317 if (flags & IB_PD_UNSAFE_GLOBAL_RKEY)
318 pd->unsafe_global_rkey = pd->__internal_mr->rkey;
319 }
320
321 return pd;
322}
323EXPORT_SYMBOL(__ib_alloc_pd);
324
325/**
326 * ib_dealloc_pd_user - Deallocates a protection domain.
327 * @pd: The protection domain to deallocate.
328 * @udata: Valid user data or NULL for kernel object
329 *
330 * It is an error to call this function while any resources in the pd still
331 * exist. The caller is responsible to synchronously destroy them and
332 * guarantee no new allocations will happen.
333 */
334int ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata)
335{
336 int ret;
337
338 if (pd->__internal_mr) {
339 ret = pd->device->ops.dereg_mr(pd->__internal_mr, NULL);
340 WARN_ON(ret);
341 pd->__internal_mr = NULL;
342 }
343
344 /* uverbs manipulates usecnt with proper locking, while the kabi
345 * requires the caller to guarantee we can't race here.
346 */
347 WARN_ON(atomic_read(&pd->usecnt));
348
349 ret = pd->device->ops.dealloc_pd(pd, udata);
350 if (ret)
351 return ret;
352
353 rdma_restrack_del(&pd->res);
354 kfree(pd);
355 return ret;
356}
357EXPORT_SYMBOL(ib_dealloc_pd_user);
358
359/* Address handles */
360
361/**
362 * rdma_copy_ah_attr - Copy rdma ah attribute from source to destination.
363 * @dest: Pointer to destination ah_attr. Contents of the destination
364 * pointer is assumed to be invalid and attribute are overwritten.
365 * @src: Pointer to source ah_attr.
366 */
367void rdma_copy_ah_attr(struct rdma_ah_attr *dest,
368 const struct rdma_ah_attr *src)
369{
370 *dest = *src;
371 if (dest->grh.sgid_attr)
372 rdma_hold_gid_attr(dest->grh.sgid_attr);
373}
374EXPORT_SYMBOL(rdma_copy_ah_attr);
375
376/**
377 * rdma_replace_ah_attr - Replace valid ah_attr with new new one.
378 * @old: Pointer to existing ah_attr which needs to be replaced.
379 * old is assumed to be valid or zero'd
380 * @new: Pointer to the new ah_attr.
381 *
382 * rdma_replace_ah_attr() first releases any reference in the old ah_attr if
383 * old the ah_attr is valid; after that it copies the new attribute and holds
384 * the reference to the replaced ah_attr.
385 */
386void rdma_replace_ah_attr(struct rdma_ah_attr *old,
387 const struct rdma_ah_attr *new)
388{
389 rdma_destroy_ah_attr(old);
390 *old = *new;
391 if (old->grh.sgid_attr)
392 rdma_hold_gid_attr(old->grh.sgid_attr);
393}
394EXPORT_SYMBOL(rdma_replace_ah_attr);
395
396/**
397 * rdma_move_ah_attr - Move ah_attr pointed by source to destination.
398 * @dest: Pointer to destination ah_attr to copy to.
399 * dest is assumed to be valid or zero'd
400 * @src: Pointer to the new ah_attr.
401 *
402 * rdma_move_ah_attr() first releases any reference in the destination ah_attr
403 * if it is valid. This also transfers ownership of internal references from
404 * src to dest, making src invalid in the process. No new reference of the src
405 * ah_attr is taken.
406 */
407void rdma_move_ah_attr(struct rdma_ah_attr *dest, struct rdma_ah_attr *src)
408{
409 rdma_destroy_ah_attr(dest);
410 *dest = *src;
411 src->grh.sgid_attr = NULL;
412}
413EXPORT_SYMBOL(rdma_move_ah_attr);
414
415/*
416 * Validate that the rdma_ah_attr is valid for the device before passing it
417 * off to the driver.
418 */
419static int rdma_check_ah_attr(struct ib_device *device,
420 struct rdma_ah_attr *ah_attr)
421{
422 if (!rdma_is_port_valid(device, ah_attr->port_num))
423 return -EINVAL;
424
425 if ((rdma_is_grh_required(device, ah_attr->port_num) ||
426 ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) &&
427 !(ah_attr->ah_flags & IB_AH_GRH))
428 return -EINVAL;
429
430 if (ah_attr->grh.sgid_attr) {
431 /*
432 * Make sure the passed sgid_attr is consistent with the
433 * parameters
434 */
435 if (ah_attr->grh.sgid_attr->index != ah_attr->grh.sgid_index ||
436 ah_attr->grh.sgid_attr->port_num != ah_attr->port_num)
437 return -EINVAL;
438 }
439 return 0;
440}
441
442/*
443 * If the ah requires a GRH then ensure that sgid_attr pointer is filled in.
444 * On success the caller is responsible to call rdma_unfill_sgid_attr().
445 */
446static int rdma_fill_sgid_attr(struct ib_device *device,
447 struct rdma_ah_attr *ah_attr,
448 const struct ib_gid_attr **old_sgid_attr)
449{
450 const struct ib_gid_attr *sgid_attr;
451 struct ib_global_route *grh;
452 int ret;
453
454 *old_sgid_attr = ah_attr->grh.sgid_attr;
455
456 ret = rdma_check_ah_attr(device, ah_attr);
457 if (ret)
458 return ret;
459
460 if (!(ah_attr->ah_flags & IB_AH_GRH))
461 return 0;
462
463 grh = rdma_ah_retrieve_grh(ah_attr);
464 if (grh->sgid_attr)
465 return 0;
466
467 sgid_attr =
468 rdma_get_gid_attr(device, ah_attr->port_num, grh->sgid_index);
469 if (IS_ERR(sgid_attr))
470 return PTR_ERR(sgid_attr);
471
472 /* Move ownerhip of the kref into the ah_attr */
473 grh->sgid_attr = sgid_attr;
474 return 0;
475}
476
477static void rdma_unfill_sgid_attr(struct rdma_ah_attr *ah_attr,
478 const struct ib_gid_attr *old_sgid_attr)
479{
480 /*
481 * Fill didn't change anything, the caller retains ownership of
482 * whatever it passed
483 */
484 if (ah_attr->grh.sgid_attr == old_sgid_attr)
485 return;
486
487 /*
488 * Otherwise, we need to undo what rdma_fill_sgid_attr so the caller
489 * doesn't see any change in the rdma_ah_attr. If we get here
490 * old_sgid_attr is NULL.
491 */
492 rdma_destroy_ah_attr(ah_attr);
493}
494
495static const struct ib_gid_attr *
496rdma_update_sgid_attr(struct rdma_ah_attr *ah_attr,
497 const struct ib_gid_attr *old_attr)
498{
499 if (old_attr)
500 rdma_put_gid_attr(old_attr);
501 if (ah_attr->ah_flags & IB_AH_GRH) {
502 rdma_hold_gid_attr(ah_attr->grh.sgid_attr);
503 return ah_attr->grh.sgid_attr;
504 }
505 return NULL;
506}
507
508static struct ib_ah *_rdma_create_ah(struct ib_pd *pd,
509 struct rdma_ah_attr *ah_attr,
510 u32 flags,
511 struct ib_udata *udata,
512 struct net_device *xmit_slave)
513{
514 struct rdma_ah_init_attr init_attr = {};
515 struct ib_device *device = pd->device;
516 struct ib_ah *ah;
517 int ret;
518
519 might_sleep_if(flags & RDMA_CREATE_AH_SLEEPABLE);
520
521 if (!udata && !device->ops.create_ah)
522 return ERR_PTR(-EOPNOTSUPP);
523
524 ah = rdma_zalloc_drv_obj_gfp(
525 device, ib_ah,
526 (flags & RDMA_CREATE_AH_SLEEPABLE) ? GFP_KERNEL : GFP_ATOMIC);
527 if (!ah)
528 return ERR_PTR(-ENOMEM);
529
530 ah->device = device;
531 ah->pd = pd;
532 ah->type = ah_attr->type;
533 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, NULL);
534 init_attr.ah_attr = ah_attr;
535 init_attr.flags = flags;
536 init_attr.xmit_slave = xmit_slave;
537
538 if (udata)
539 ret = device->ops.create_user_ah(ah, &init_attr, udata);
540 else
541 ret = device->ops.create_ah(ah, &init_attr, NULL);
542 if (ret) {
543 kfree(ah);
544 return ERR_PTR(ret);
545 }
546
547 atomic_inc(&pd->usecnt);
548 return ah;
549}
550
551/**
552 * rdma_create_ah - Creates an address handle for the
553 * given address vector.
554 * @pd: The protection domain associated with the address handle.
555 * @ah_attr: The attributes of the address vector.
556 * @flags: Create address handle flags (see enum rdma_create_ah_flags).
557 *
558 * It returns 0 on success and returns appropriate error code on error.
559 * The address handle is used to reference a local or global destination
560 * in all UD QP post sends.
561 */
562struct ib_ah *rdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
563 u32 flags)
564{
565 const struct ib_gid_attr *old_sgid_attr;
566 struct net_device *slave;
567 struct ib_ah *ah;
568 int ret;
569
570 ret = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
571 if (ret)
572 return ERR_PTR(ret);
573 slave = rdma_lag_get_ah_roce_slave(pd->device, ah_attr,
574 (flags & RDMA_CREATE_AH_SLEEPABLE) ?
575 GFP_KERNEL : GFP_ATOMIC);
576 if (IS_ERR(slave)) {
577 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
578 return (void *)slave;
579 }
580 ah = _rdma_create_ah(pd, ah_attr, flags, NULL, slave);
581 rdma_lag_put_ah_roce_slave(slave);
582 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
583 return ah;
584}
585EXPORT_SYMBOL(rdma_create_ah);
586
587/**
588 * rdma_create_user_ah - Creates an address handle for the
589 * given address vector.
590 * It resolves destination mac address for ah attribute of RoCE type.
591 * @pd: The protection domain associated with the address handle.
592 * @ah_attr: The attributes of the address vector.
593 * @udata: pointer to user's input output buffer information need by
594 * provider driver.
595 *
596 * It returns 0 on success and returns appropriate error code on error.
597 * The address handle is used to reference a local or global destination
598 * in all UD QP post sends.
599 */
600struct ib_ah *rdma_create_user_ah(struct ib_pd *pd,
601 struct rdma_ah_attr *ah_attr,
602 struct ib_udata *udata)
603{
604 const struct ib_gid_attr *old_sgid_attr;
605 struct ib_ah *ah;
606 int err;
607
608 err = rdma_fill_sgid_attr(pd->device, ah_attr, &old_sgid_attr);
609 if (err)
610 return ERR_PTR(err);
611
612 if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
613 err = ib_resolve_eth_dmac(pd->device, ah_attr);
614 if (err) {
615 ah = ERR_PTR(err);
616 goto out;
617 }
618 }
619
620 ah = _rdma_create_ah(pd, ah_attr, RDMA_CREATE_AH_SLEEPABLE,
621 udata, NULL);
622
623out:
624 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
625 return ah;
626}
627EXPORT_SYMBOL(rdma_create_user_ah);
628
629int ib_get_rdma_header_version(const union rdma_network_hdr *hdr)
630{
631 const struct iphdr *ip4h = (struct iphdr *)&hdr->roce4grh;
632 struct iphdr ip4h_checked;
633 const struct ipv6hdr *ip6h = (struct ipv6hdr *)&hdr->ibgrh;
634
635 /* If it's IPv6, the version must be 6, otherwise, the first
636 * 20 bytes (before the IPv4 header) are garbled.
637 */
638 if (ip6h->version != 6)
639 return (ip4h->version == 4) ? 4 : 0;
640 /* version may be 6 or 4 because the first 20 bytes could be garbled */
641
642 /* RoCE v2 requires no options, thus header length
643 * must be 5 words
644 */
645 if (ip4h->ihl != 5)
646 return 6;
647
648 /* Verify checksum.
649 * We can't write on scattered buffers so we need to copy to
650 * temp buffer.
651 */
652 memcpy(&ip4h_checked, ip4h, sizeof(ip4h_checked));
653 ip4h_checked.check = 0;
654 ip4h_checked.check = ip_fast_csum((u8 *)&ip4h_checked, 5);
655 /* if IPv4 header checksum is OK, believe it */
656 if (ip4h->check == ip4h_checked.check)
657 return 4;
658 return 6;
659}
660EXPORT_SYMBOL(ib_get_rdma_header_version);
661
662static enum rdma_network_type ib_get_net_type_by_grh(struct ib_device *device,
663 u32 port_num,
664 const struct ib_grh *grh)
665{
666 int grh_version;
667
668 if (rdma_protocol_ib(device, port_num))
669 return RDMA_NETWORK_IB;
670
671 grh_version = ib_get_rdma_header_version((union rdma_network_hdr *)grh);
672
673 if (grh_version == 4)
674 return RDMA_NETWORK_IPV4;
675
676 if (grh->next_hdr == IPPROTO_UDP)
677 return RDMA_NETWORK_IPV6;
678
679 return RDMA_NETWORK_ROCE_V1;
680}
681
682struct find_gid_index_context {
683 u16 vlan_id;
684 enum ib_gid_type gid_type;
685};
686
687static bool find_gid_index(const union ib_gid *gid,
688 const struct ib_gid_attr *gid_attr,
689 void *context)
690{
691 struct find_gid_index_context *ctx = context;
692 u16 vlan_id = 0xffff;
693 int ret;
694
695 if (ctx->gid_type != gid_attr->gid_type)
696 return false;
697
698 ret = rdma_read_gid_l2_fields(gid_attr, &vlan_id, NULL);
699 if (ret)
700 return false;
701
702 return ctx->vlan_id == vlan_id;
703}
704
705static const struct ib_gid_attr *
706get_sgid_attr_from_eth(struct ib_device *device, u32 port_num,
707 u16 vlan_id, const union ib_gid *sgid,
708 enum ib_gid_type gid_type)
709{
710 struct find_gid_index_context context = {.vlan_id = vlan_id,
711 .gid_type = gid_type};
712
713 return rdma_find_gid_by_filter(device, sgid, port_num, find_gid_index,
714 &context);
715}
716
717int ib_get_gids_from_rdma_hdr(const union rdma_network_hdr *hdr,
718 enum rdma_network_type net_type,
719 union ib_gid *sgid, union ib_gid *dgid)
720{
721 struct sockaddr_in src_in;
722 struct sockaddr_in dst_in;
723 __be32 src_saddr, dst_saddr;
724
725 if (!sgid || !dgid)
726 return -EINVAL;
727
728 if (net_type == RDMA_NETWORK_IPV4) {
729 memcpy(&src_in.sin_addr.s_addr,
730 &hdr->roce4grh.saddr, 4);
731 memcpy(&dst_in.sin_addr.s_addr,
732 &hdr->roce4grh.daddr, 4);
733 src_saddr = src_in.sin_addr.s_addr;
734 dst_saddr = dst_in.sin_addr.s_addr;
735 ipv6_addr_set_v4mapped(src_saddr,
736 (struct in6_addr *)sgid);
737 ipv6_addr_set_v4mapped(dst_saddr,
738 (struct in6_addr *)dgid);
739 return 0;
740 } else if (net_type == RDMA_NETWORK_IPV6 ||
741 net_type == RDMA_NETWORK_IB || RDMA_NETWORK_ROCE_V1) {
742 *dgid = hdr->ibgrh.dgid;
743 *sgid = hdr->ibgrh.sgid;
744 return 0;
745 } else {
746 return -EINVAL;
747 }
748}
749EXPORT_SYMBOL(ib_get_gids_from_rdma_hdr);
750
751/* Resolve destination mac address and hop limit for unicast destination
752 * GID entry, considering the source GID entry as well.
753 * ah_attribute must have have valid port_num, sgid_index.
754 */
755static int ib_resolve_unicast_gid_dmac(struct ib_device *device,
756 struct rdma_ah_attr *ah_attr)
757{
758 struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr);
759 const struct ib_gid_attr *sgid_attr = grh->sgid_attr;
760 int hop_limit = 0xff;
761 int ret = 0;
762
763 /* If destination is link local and source GID is RoCEv1,
764 * IP stack is not used.
765 */
766 if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw) &&
767 sgid_attr->gid_type == IB_GID_TYPE_ROCE) {
768 rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw,
769 ah_attr->roce.dmac);
770 return ret;
771 }
772
773 ret = rdma_addr_find_l2_eth_by_grh(&sgid_attr->gid, &grh->dgid,
774 ah_attr->roce.dmac,
775 sgid_attr, &hop_limit);
776
777 grh->hop_limit = hop_limit;
778 return ret;
779}
780
781/*
782 * This function initializes address handle attributes from the incoming packet.
783 * Incoming packet has dgid of the receiver node on which this code is
784 * getting executed and, sgid contains the GID of the sender.
785 *
786 * When resolving mac address of destination, the arrived dgid is used
787 * as sgid and, sgid is used as dgid because sgid contains destinations
788 * GID whom to respond to.
789 *
790 * On success the caller is responsible to call rdma_destroy_ah_attr on the
791 * attr.
792 */
793int ib_init_ah_attr_from_wc(struct ib_device *device, u32 port_num,
794 const struct ib_wc *wc, const struct ib_grh *grh,
795 struct rdma_ah_attr *ah_attr)
796{
797 u32 flow_class;
798 int ret;
799 enum rdma_network_type net_type = RDMA_NETWORK_IB;
800 enum ib_gid_type gid_type = IB_GID_TYPE_IB;
801 const struct ib_gid_attr *sgid_attr;
802 int hoplimit = 0xff;
803 union ib_gid dgid;
804 union ib_gid sgid;
805
806 might_sleep();
807
808 memset(ah_attr, 0, sizeof *ah_attr);
809 ah_attr->type = rdma_ah_find_type(device, port_num);
810 if (rdma_cap_eth_ah(device, port_num)) {
811 if (wc->wc_flags & IB_WC_WITH_NETWORK_HDR_TYPE)
812 net_type = wc->network_hdr_type;
813 else
814 net_type = ib_get_net_type_by_grh(device, port_num, grh);
815 gid_type = ib_network_to_gid_type(net_type);
816 }
817 ret = ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
818 &sgid, &dgid);
819 if (ret)
820 return ret;
821
822 rdma_ah_set_sl(ah_attr, wc->sl);
823 rdma_ah_set_port_num(ah_attr, port_num);
824
825 if (rdma_protocol_roce(device, port_num)) {
826 u16 vlan_id = wc->wc_flags & IB_WC_WITH_VLAN ?
827 wc->vlan_id : 0xffff;
828
829 if (!(wc->wc_flags & IB_WC_GRH))
830 return -EPROTOTYPE;
831
832 sgid_attr = get_sgid_attr_from_eth(device, port_num,
833 vlan_id, &dgid,
834 gid_type);
835 if (IS_ERR(sgid_attr))
836 return PTR_ERR(sgid_attr);
837
838 flow_class = be32_to_cpu(grh->version_tclass_flow);
839 rdma_move_grh_sgid_attr(ah_attr,
840 &sgid,
841 flow_class & 0xFFFFF,
842 hoplimit,
843 (flow_class >> 20) & 0xFF,
844 sgid_attr);
845
846 ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
847 if (ret)
848 rdma_destroy_ah_attr(ah_attr);
849
850 return ret;
851 } else {
852 rdma_ah_set_dlid(ah_attr, wc->slid);
853 rdma_ah_set_path_bits(ah_attr, wc->dlid_path_bits);
854
855 if ((wc->wc_flags & IB_WC_GRH) == 0)
856 return 0;
857
858 if (dgid.global.interface_id !=
859 cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) {
860 sgid_attr = rdma_find_gid_by_port(
861 device, &dgid, IB_GID_TYPE_IB, port_num, NULL);
862 } else
863 sgid_attr = rdma_get_gid_attr(device, port_num, 0);
864
865 if (IS_ERR(sgid_attr))
866 return PTR_ERR(sgid_attr);
867 flow_class = be32_to_cpu(grh->version_tclass_flow);
868 rdma_move_grh_sgid_attr(ah_attr,
869 &sgid,
870 flow_class & 0xFFFFF,
871 hoplimit,
872 (flow_class >> 20) & 0xFF,
873 sgid_attr);
874
875 return 0;
876 }
877}
878EXPORT_SYMBOL(ib_init_ah_attr_from_wc);
879
880/**
881 * rdma_move_grh_sgid_attr - Sets the sgid attribute of GRH, taking ownership
882 * of the reference
883 *
884 * @attr: Pointer to AH attribute structure
885 * @dgid: Destination GID
886 * @flow_label: Flow label
887 * @hop_limit: Hop limit
888 * @traffic_class: traffic class
889 * @sgid_attr: Pointer to SGID attribute
890 *
891 * This takes ownership of the sgid_attr reference. The caller must ensure
892 * rdma_destroy_ah_attr() is called before destroying the rdma_ah_attr after
893 * calling this function.
894 */
895void rdma_move_grh_sgid_attr(struct rdma_ah_attr *attr, union ib_gid *dgid,
896 u32 flow_label, u8 hop_limit, u8 traffic_class,
897 const struct ib_gid_attr *sgid_attr)
898{
899 rdma_ah_set_grh(attr, dgid, flow_label, sgid_attr->index, hop_limit,
900 traffic_class);
901 attr->grh.sgid_attr = sgid_attr;
902}
903EXPORT_SYMBOL(rdma_move_grh_sgid_attr);
904
905/**
906 * rdma_destroy_ah_attr - Release reference to SGID attribute of
907 * ah attribute.
908 * @ah_attr: Pointer to ah attribute
909 *
910 * Release reference to the SGID attribute of the ah attribute if it is
911 * non NULL. It is safe to call this multiple times, and safe to call it on
912 * a zero initialized ah_attr.
913 */
914void rdma_destroy_ah_attr(struct rdma_ah_attr *ah_attr)
915{
916 if (ah_attr->grh.sgid_attr) {
917 rdma_put_gid_attr(ah_attr->grh.sgid_attr);
918 ah_attr->grh.sgid_attr = NULL;
919 }
920}
921EXPORT_SYMBOL(rdma_destroy_ah_attr);
922
923struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, const struct ib_wc *wc,
924 const struct ib_grh *grh, u32 port_num)
925{
926 struct rdma_ah_attr ah_attr;
927 struct ib_ah *ah;
928 int ret;
929
930 ret = ib_init_ah_attr_from_wc(pd->device, port_num, wc, grh, &ah_attr);
931 if (ret)
932 return ERR_PTR(ret);
933
934 ah = rdma_create_ah(pd, &ah_attr, RDMA_CREATE_AH_SLEEPABLE);
935
936 rdma_destroy_ah_attr(&ah_attr);
937 return ah;
938}
939EXPORT_SYMBOL(ib_create_ah_from_wc);
940
941int rdma_modify_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
942{
943 const struct ib_gid_attr *old_sgid_attr;
944 int ret;
945
946 if (ah->type != ah_attr->type)
947 return -EINVAL;
948
949 ret = rdma_fill_sgid_attr(ah->device, ah_attr, &old_sgid_attr);
950 if (ret)
951 return ret;
952
953 ret = ah->device->ops.modify_ah ?
954 ah->device->ops.modify_ah(ah, ah_attr) :
955 -EOPNOTSUPP;
956
957 ah->sgid_attr = rdma_update_sgid_attr(ah_attr, ah->sgid_attr);
958 rdma_unfill_sgid_attr(ah_attr, old_sgid_attr);
959 return ret;
960}
961EXPORT_SYMBOL(rdma_modify_ah);
962
963int rdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr)
964{
965 ah_attr->grh.sgid_attr = NULL;
966
967 return ah->device->ops.query_ah ?
968 ah->device->ops.query_ah(ah, ah_attr) :
969 -EOPNOTSUPP;
970}
971EXPORT_SYMBOL(rdma_query_ah);
972
973int rdma_destroy_ah_user(struct ib_ah *ah, u32 flags, struct ib_udata *udata)
974{
975 const struct ib_gid_attr *sgid_attr = ah->sgid_attr;
976 struct ib_pd *pd;
977 int ret;
978
979 might_sleep_if(flags & RDMA_DESTROY_AH_SLEEPABLE);
980
981 pd = ah->pd;
982
983 ret = ah->device->ops.destroy_ah(ah, flags);
984 if (ret)
985 return ret;
986
987 atomic_dec(&pd->usecnt);
988 if (sgid_attr)
989 rdma_put_gid_attr(sgid_attr);
990
991 kfree(ah);
992 return ret;
993}
994EXPORT_SYMBOL(rdma_destroy_ah_user);
995
996/* Shared receive queues */
997
998/**
999 * ib_create_srq_user - Creates a SRQ associated with the specified protection
1000 * domain.
1001 * @pd: The protection domain associated with the SRQ.
1002 * @srq_init_attr: A list of initial attributes required to create the
1003 * SRQ. If SRQ creation succeeds, then the attributes are updated to
1004 * the actual capabilities of the created SRQ.
1005 * @uobject: uobject pointer if this is not a kernel SRQ
1006 * @udata: udata pointer if this is not a kernel SRQ
1007 *
1008 * srq_attr->max_wr and srq_attr->max_sge are read the determine the
1009 * requested size of the SRQ, and set to the actual values allocated
1010 * on return. If ib_create_srq() succeeds, then max_wr and max_sge
1011 * will always be at least as large as the requested values.
1012 */
1013struct ib_srq *ib_create_srq_user(struct ib_pd *pd,
1014 struct ib_srq_init_attr *srq_init_attr,
1015 struct ib_usrq_object *uobject,
1016 struct ib_udata *udata)
1017{
1018 struct ib_srq *srq;
1019 int ret;
1020
1021 srq = rdma_zalloc_drv_obj(pd->device, ib_srq);
1022 if (!srq)
1023 return ERR_PTR(-ENOMEM);
1024
1025 srq->device = pd->device;
1026 srq->pd = pd;
1027 srq->event_handler = srq_init_attr->event_handler;
1028 srq->srq_context = srq_init_attr->srq_context;
1029 srq->srq_type = srq_init_attr->srq_type;
1030 srq->uobject = uobject;
1031
1032 if (ib_srq_has_cq(srq->srq_type)) {
1033 srq->ext.cq = srq_init_attr->ext.cq;
1034 atomic_inc(&srq->ext.cq->usecnt);
1035 }
1036 if (srq->srq_type == IB_SRQT_XRC) {
1037 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
1038 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
1039 }
1040 atomic_inc(&pd->usecnt);
1041
1042 rdma_restrack_new(&srq->res, RDMA_RESTRACK_SRQ);
1043 rdma_restrack_parent_name(&srq->res, &pd->res);
1044
1045 ret = pd->device->ops.create_srq(srq, srq_init_attr, udata);
1046 if (ret) {
1047 rdma_restrack_put(&srq->res);
1048 atomic_dec(&srq->pd->usecnt);
1049 if (srq->srq_type == IB_SRQT_XRC)
1050 atomic_dec(&srq->ext.xrc.xrcd->usecnt);
1051 if (ib_srq_has_cq(srq->srq_type))
1052 atomic_dec(&srq->ext.cq->usecnt);
1053 kfree(srq);
1054 return ERR_PTR(ret);
1055 }
1056
1057 rdma_restrack_add(&srq->res);
1058
1059 return srq;
1060}
1061EXPORT_SYMBOL(ib_create_srq_user);
1062
1063int ib_modify_srq(struct ib_srq *srq,
1064 struct ib_srq_attr *srq_attr,
1065 enum ib_srq_attr_mask srq_attr_mask)
1066{
1067 return srq->device->ops.modify_srq ?
1068 srq->device->ops.modify_srq(srq, srq_attr, srq_attr_mask,
1069 NULL) : -EOPNOTSUPP;
1070}
1071EXPORT_SYMBOL(ib_modify_srq);
1072
1073int ib_query_srq(struct ib_srq *srq,
1074 struct ib_srq_attr *srq_attr)
1075{
1076 return srq->device->ops.query_srq ?
1077 srq->device->ops.query_srq(srq, srq_attr) : -EOPNOTSUPP;
1078}
1079EXPORT_SYMBOL(ib_query_srq);
1080
1081int ib_destroy_srq_user(struct ib_srq *srq, struct ib_udata *udata)
1082{
1083 int ret;
1084
1085 if (atomic_read(&srq->usecnt))
1086 return -EBUSY;
1087
1088 ret = srq->device->ops.destroy_srq(srq, udata);
1089 if (ret)
1090 return ret;
1091
1092 atomic_dec(&srq->pd->usecnt);
1093 if (srq->srq_type == IB_SRQT_XRC)
1094 atomic_dec(&srq->ext.xrc.xrcd->usecnt);
1095 if (ib_srq_has_cq(srq->srq_type))
1096 atomic_dec(&srq->ext.cq->usecnt);
1097 rdma_restrack_del(&srq->res);
1098 kfree(srq);
1099
1100 return ret;
1101}
1102EXPORT_SYMBOL(ib_destroy_srq_user);
1103
1104/* Queue pairs */
1105
1106static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
1107{
1108 struct ib_qp *qp = context;
1109 unsigned long flags;
1110
1111 spin_lock_irqsave(&qp->device->qp_open_list_lock, flags);
1112 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
1113 if (event->element.qp->event_handler)
1114 event->element.qp->event_handler(event, event->element.qp->qp_context);
1115 spin_unlock_irqrestore(&qp->device->qp_open_list_lock, flags);
1116}
1117
1118static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
1119 void (*event_handler)(struct ib_event *, void *),
1120 void *qp_context)
1121{
1122 struct ib_qp *qp;
1123 unsigned long flags;
1124 int err;
1125
1126 qp = kzalloc(sizeof *qp, GFP_KERNEL);
1127 if (!qp)
1128 return ERR_PTR(-ENOMEM);
1129
1130 qp->real_qp = real_qp;
1131 err = ib_open_shared_qp_security(qp, real_qp->device);
1132 if (err) {
1133 kfree(qp);
1134 return ERR_PTR(err);
1135 }
1136
1137 qp->real_qp = real_qp;
1138 atomic_inc(&real_qp->usecnt);
1139 qp->device = real_qp->device;
1140 qp->event_handler = event_handler;
1141 qp->qp_context = qp_context;
1142 qp->qp_num = real_qp->qp_num;
1143 qp->qp_type = real_qp->qp_type;
1144
1145 spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags);
1146 list_add(&qp->open_list, &real_qp->open_list);
1147 spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags);
1148
1149 return qp;
1150}
1151
1152struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
1153 struct ib_qp_open_attr *qp_open_attr)
1154{
1155 struct ib_qp *qp, *real_qp;
1156
1157 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
1158 return ERR_PTR(-EINVAL);
1159
1160 down_read(&xrcd->tgt_qps_rwsem);
1161 real_qp = xa_load(&xrcd->tgt_qps, qp_open_attr->qp_num);
1162 if (!real_qp) {
1163 up_read(&xrcd->tgt_qps_rwsem);
1164 return ERR_PTR(-EINVAL);
1165 }
1166 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
1167 qp_open_attr->qp_context);
1168 up_read(&xrcd->tgt_qps_rwsem);
1169 return qp;
1170}
1171EXPORT_SYMBOL(ib_open_qp);
1172
1173static struct ib_qp *create_xrc_qp_user(struct ib_qp *qp,
1174 struct ib_qp_init_attr *qp_init_attr)
1175{
1176 struct ib_qp *real_qp = qp;
1177 int err;
1178
1179 qp->event_handler = __ib_shared_qp_event_handler;
1180 qp->qp_context = qp;
1181 qp->pd = NULL;
1182 qp->send_cq = qp->recv_cq = NULL;
1183 qp->srq = NULL;
1184 qp->xrcd = qp_init_attr->xrcd;
1185 atomic_inc(&qp_init_attr->xrcd->usecnt);
1186 INIT_LIST_HEAD(&qp->open_list);
1187
1188 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
1189 qp_init_attr->qp_context);
1190 if (IS_ERR(qp))
1191 return qp;
1192
1193 err = xa_err(xa_store(&qp_init_attr->xrcd->tgt_qps, real_qp->qp_num,
1194 real_qp, GFP_KERNEL));
1195 if (err) {
1196 ib_close_qp(qp);
1197 return ERR_PTR(err);
1198 }
1199 return qp;
1200}
1201
1202/**
1203 * ib_create_named_qp - Creates a kernel QP associated with the specified protection
1204 * domain.
1205 * @pd: The protection domain associated with the QP.
1206 * @qp_init_attr: A list of initial attributes required to create the
1207 * QP. If QP creation succeeds, then the attributes are updated to
1208 * the actual capabilities of the created QP.
1209 * @caller: caller's build-time module name
1210 *
1211 * NOTE: for user qp use ib_create_qp_user with valid udata!
1212 */
1213struct ib_qp *ib_create_named_qp(struct ib_pd *pd,
1214 struct ib_qp_init_attr *qp_init_attr,
1215 const char *caller)
1216{
1217 struct ib_device *device = pd ? pd->device : qp_init_attr->xrcd->device;
1218 struct ib_qp *qp;
1219 int ret;
1220
1221 if (qp_init_attr->rwq_ind_tbl &&
1222 (qp_init_attr->recv_cq ||
1223 qp_init_attr->srq || qp_init_attr->cap.max_recv_wr ||
1224 qp_init_attr->cap.max_recv_sge))
1225 return ERR_PTR(-EINVAL);
1226
1227 if ((qp_init_attr->create_flags & IB_QP_CREATE_INTEGRITY_EN) &&
1228 !(device->attrs.device_cap_flags & IB_DEVICE_INTEGRITY_HANDOVER))
1229 return ERR_PTR(-EINVAL);
1230
1231 /*
1232 * If the callers is using the RDMA API calculate the resources
1233 * needed for the RDMA READ/WRITE operations.
1234 *
1235 * Note that these callers need to pass in a port number.
1236 */
1237 if (qp_init_attr->cap.max_rdma_ctxs)
1238 rdma_rw_init_qp(device, qp_init_attr);
1239
1240 qp = _ib_create_qp(device, pd, qp_init_attr, NULL, NULL, caller);
1241 if (IS_ERR(qp))
1242 return qp;
1243
1244 ret = ib_create_qp_security(qp, device);
1245 if (ret)
1246 goto err;
1247
1248 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
1249 struct ib_qp *xrc_qp =
1250 create_xrc_qp_user(qp, qp_init_attr);
1251
1252 if (IS_ERR(xrc_qp)) {
1253 ret = PTR_ERR(xrc_qp);
1254 goto err;
1255 }
1256 return xrc_qp;
1257 }
1258
1259 qp->event_handler = qp_init_attr->event_handler;
1260 qp->qp_context = qp_init_attr->qp_context;
1261 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
1262 qp->recv_cq = NULL;
1263 qp->srq = NULL;
1264 } else {
1265 qp->recv_cq = qp_init_attr->recv_cq;
1266 if (qp_init_attr->recv_cq)
1267 atomic_inc(&qp_init_attr->recv_cq->usecnt);
1268 qp->srq = qp_init_attr->srq;
1269 if (qp->srq)
1270 atomic_inc(&qp_init_attr->srq->usecnt);
1271 }
1272
1273 qp->send_cq = qp_init_attr->send_cq;
1274 qp->xrcd = NULL;
1275
1276 atomic_inc(&pd->usecnt);
1277 if (qp_init_attr->send_cq)
1278 atomic_inc(&qp_init_attr->send_cq->usecnt);
1279 if (qp_init_attr->rwq_ind_tbl)
1280 atomic_inc(&qp->rwq_ind_tbl->usecnt);
1281
1282 if (qp_init_attr->cap.max_rdma_ctxs) {
1283 ret = rdma_rw_init_mrs(qp, qp_init_attr);
1284 if (ret)
1285 goto err;
1286 }
1287
1288 /*
1289 * Note: all hw drivers guarantee that max_send_sge is lower than
1290 * the device RDMA WRITE SGE limit but not all hw drivers ensure that
1291 * max_send_sge <= max_sge_rd.
1292 */
1293 qp->max_write_sge = qp_init_attr->cap.max_send_sge;
1294 qp->max_read_sge = min_t(u32, qp_init_attr->cap.max_send_sge,
1295 device->attrs.max_sge_rd);
1296 if (qp_init_attr->create_flags & IB_QP_CREATE_INTEGRITY_EN)
1297 qp->integrity_en = true;
1298
1299 return qp;
1300
1301err:
1302 ib_destroy_qp(qp);
1303 return ERR_PTR(ret);
1304
1305}
1306EXPORT_SYMBOL(ib_create_named_qp);
1307
1308static const struct {
1309 int valid;
1310 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
1311 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
1312} qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
1313 [IB_QPS_RESET] = {
1314 [IB_QPS_RESET] = { .valid = 1 },
1315 [IB_QPS_INIT] = {
1316 .valid = 1,
1317 .req_param = {
1318 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1319 IB_QP_PORT |
1320 IB_QP_QKEY),
1321 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
1322 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
1323 IB_QP_PORT |
1324 IB_QP_ACCESS_FLAGS),
1325 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
1326 IB_QP_PORT |
1327 IB_QP_ACCESS_FLAGS),
1328 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
1329 IB_QP_PORT |
1330 IB_QP_ACCESS_FLAGS),
1331 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
1332 IB_QP_PORT |
1333 IB_QP_ACCESS_FLAGS),
1334 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1335 IB_QP_QKEY),
1336 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1337 IB_QP_QKEY),
1338 }
1339 },
1340 },
1341 [IB_QPS_INIT] = {
1342 [IB_QPS_RESET] = { .valid = 1 },
1343 [IB_QPS_ERR] = { .valid = 1 },
1344 [IB_QPS_INIT] = {
1345 .valid = 1,
1346 .opt_param = {
1347 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1348 IB_QP_PORT |
1349 IB_QP_QKEY),
1350 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
1351 IB_QP_PORT |
1352 IB_QP_ACCESS_FLAGS),
1353 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
1354 IB_QP_PORT |
1355 IB_QP_ACCESS_FLAGS),
1356 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
1357 IB_QP_PORT |
1358 IB_QP_ACCESS_FLAGS),
1359 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
1360 IB_QP_PORT |
1361 IB_QP_ACCESS_FLAGS),
1362 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1363 IB_QP_QKEY),
1364 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1365 IB_QP_QKEY),
1366 }
1367 },
1368 [IB_QPS_RTR] = {
1369 .valid = 1,
1370 .req_param = {
1371 [IB_QPT_UC] = (IB_QP_AV |
1372 IB_QP_PATH_MTU |
1373 IB_QP_DEST_QPN |
1374 IB_QP_RQ_PSN),
1375 [IB_QPT_RC] = (IB_QP_AV |
1376 IB_QP_PATH_MTU |
1377 IB_QP_DEST_QPN |
1378 IB_QP_RQ_PSN |
1379 IB_QP_MAX_DEST_RD_ATOMIC |
1380 IB_QP_MIN_RNR_TIMER),
1381 [IB_QPT_XRC_INI] = (IB_QP_AV |
1382 IB_QP_PATH_MTU |
1383 IB_QP_DEST_QPN |
1384 IB_QP_RQ_PSN),
1385 [IB_QPT_XRC_TGT] = (IB_QP_AV |
1386 IB_QP_PATH_MTU |
1387 IB_QP_DEST_QPN |
1388 IB_QP_RQ_PSN |
1389 IB_QP_MAX_DEST_RD_ATOMIC |
1390 IB_QP_MIN_RNR_TIMER),
1391 },
1392 .opt_param = {
1393 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1394 IB_QP_QKEY),
1395 [IB_QPT_UC] = (IB_QP_ALT_PATH |
1396 IB_QP_ACCESS_FLAGS |
1397 IB_QP_PKEY_INDEX),
1398 [IB_QPT_RC] = (IB_QP_ALT_PATH |
1399 IB_QP_ACCESS_FLAGS |
1400 IB_QP_PKEY_INDEX),
1401 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
1402 IB_QP_ACCESS_FLAGS |
1403 IB_QP_PKEY_INDEX),
1404 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
1405 IB_QP_ACCESS_FLAGS |
1406 IB_QP_PKEY_INDEX),
1407 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1408 IB_QP_QKEY),
1409 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1410 IB_QP_QKEY),
1411 },
1412 },
1413 },
1414 [IB_QPS_RTR] = {
1415 [IB_QPS_RESET] = { .valid = 1 },
1416 [IB_QPS_ERR] = { .valid = 1 },
1417 [IB_QPS_RTS] = {
1418 .valid = 1,
1419 .req_param = {
1420 [IB_QPT_UD] = IB_QP_SQ_PSN,
1421 [IB_QPT_UC] = IB_QP_SQ_PSN,
1422 [IB_QPT_RC] = (IB_QP_TIMEOUT |
1423 IB_QP_RETRY_CNT |
1424 IB_QP_RNR_RETRY |
1425 IB_QP_SQ_PSN |
1426 IB_QP_MAX_QP_RD_ATOMIC),
1427 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
1428 IB_QP_RETRY_CNT |
1429 IB_QP_RNR_RETRY |
1430 IB_QP_SQ_PSN |
1431 IB_QP_MAX_QP_RD_ATOMIC),
1432 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
1433 IB_QP_SQ_PSN),
1434 [IB_QPT_SMI] = IB_QP_SQ_PSN,
1435 [IB_QPT_GSI] = IB_QP_SQ_PSN,
1436 },
1437 .opt_param = {
1438 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1439 IB_QP_QKEY),
1440 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1441 IB_QP_ALT_PATH |
1442 IB_QP_ACCESS_FLAGS |
1443 IB_QP_PATH_MIG_STATE),
1444 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1445 IB_QP_ALT_PATH |
1446 IB_QP_ACCESS_FLAGS |
1447 IB_QP_MIN_RNR_TIMER |
1448 IB_QP_PATH_MIG_STATE),
1449 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1450 IB_QP_ALT_PATH |
1451 IB_QP_ACCESS_FLAGS |
1452 IB_QP_PATH_MIG_STATE),
1453 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1454 IB_QP_ALT_PATH |
1455 IB_QP_ACCESS_FLAGS |
1456 IB_QP_MIN_RNR_TIMER |
1457 IB_QP_PATH_MIG_STATE),
1458 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1459 IB_QP_QKEY),
1460 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1461 IB_QP_QKEY),
1462 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1463 }
1464 }
1465 },
1466 [IB_QPS_RTS] = {
1467 [IB_QPS_RESET] = { .valid = 1 },
1468 [IB_QPS_ERR] = { .valid = 1 },
1469 [IB_QPS_RTS] = {
1470 .valid = 1,
1471 .opt_param = {
1472 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1473 IB_QP_QKEY),
1474 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1475 IB_QP_ACCESS_FLAGS |
1476 IB_QP_ALT_PATH |
1477 IB_QP_PATH_MIG_STATE),
1478 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1479 IB_QP_ACCESS_FLAGS |
1480 IB_QP_ALT_PATH |
1481 IB_QP_PATH_MIG_STATE |
1482 IB_QP_MIN_RNR_TIMER),
1483 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1484 IB_QP_ACCESS_FLAGS |
1485 IB_QP_ALT_PATH |
1486 IB_QP_PATH_MIG_STATE),
1487 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1488 IB_QP_ACCESS_FLAGS |
1489 IB_QP_ALT_PATH |
1490 IB_QP_PATH_MIG_STATE |
1491 IB_QP_MIN_RNR_TIMER),
1492 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1493 IB_QP_QKEY),
1494 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1495 IB_QP_QKEY),
1496 [IB_QPT_RAW_PACKET] = IB_QP_RATE_LIMIT,
1497 }
1498 },
1499 [IB_QPS_SQD] = {
1500 .valid = 1,
1501 .opt_param = {
1502 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1503 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1504 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1505 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1506 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
1507 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
1508 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
1509 }
1510 },
1511 },
1512 [IB_QPS_SQD] = {
1513 [IB_QPS_RESET] = { .valid = 1 },
1514 [IB_QPS_ERR] = { .valid = 1 },
1515 [IB_QPS_RTS] = {
1516 .valid = 1,
1517 .opt_param = {
1518 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1519 IB_QP_QKEY),
1520 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1521 IB_QP_ALT_PATH |
1522 IB_QP_ACCESS_FLAGS |
1523 IB_QP_PATH_MIG_STATE),
1524 [IB_QPT_RC] = (IB_QP_CUR_STATE |
1525 IB_QP_ALT_PATH |
1526 IB_QP_ACCESS_FLAGS |
1527 IB_QP_MIN_RNR_TIMER |
1528 IB_QP_PATH_MIG_STATE),
1529 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
1530 IB_QP_ALT_PATH |
1531 IB_QP_ACCESS_FLAGS |
1532 IB_QP_PATH_MIG_STATE),
1533 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
1534 IB_QP_ALT_PATH |
1535 IB_QP_ACCESS_FLAGS |
1536 IB_QP_MIN_RNR_TIMER |
1537 IB_QP_PATH_MIG_STATE),
1538 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1539 IB_QP_QKEY),
1540 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1541 IB_QP_QKEY),
1542 }
1543 },
1544 [IB_QPS_SQD] = {
1545 .valid = 1,
1546 .opt_param = {
1547 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
1548 IB_QP_QKEY),
1549 [IB_QPT_UC] = (IB_QP_AV |
1550 IB_QP_ALT_PATH |
1551 IB_QP_ACCESS_FLAGS |
1552 IB_QP_PKEY_INDEX |
1553 IB_QP_PATH_MIG_STATE),
1554 [IB_QPT_RC] = (IB_QP_PORT |
1555 IB_QP_AV |
1556 IB_QP_TIMEOUT |
1557 IB_QP_RETRY_CNT |
1558 IB_QP_RNR_RETRY |
1559 IB_QP_MAX_QP_RD_ATOMIC |
1560 IB_QP_MAX_DEST_RD_ATOMIC |
1561 IB_QP_ALT_PATH |
1562 IB_QP_ACCESS_FLAGS |
1563 IB_QP_PKEY_INDEX |
1564 IB_QP_MIN_RNR_TIMER |
1565 IB_QP_PATH_MIG_STATE),
1566 [IB_QPT_XRC_INI] = (IB_QP_PORT |
1567 IB_QP_AV |
1568 IB_QP_TIMEOUT |
1569 IB_QP_RETRY_CNT |
1570 IB_QP_RNR_RETRY |
1571 IB_QP_MAX_QP_RD_ATOMIC |
1572 IB_QP_ALT_PATH |
1573 IB_QP_ACCESS_FLAGS |
1574 IB_QP_PKEY_INDEX |
1575 IB_QP_PATH_MIG_STATE),
1576 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
1577 IB_QP_AV |
1578 IB_QP_TIMEOUT |
1579 IB_QP_MAX_DEST_RD_ATOMIC |
1580 IB_QP_ALT_PATH |
1581 IB_QP_ACCESS_FLAGS |
1582 IB_QP_PKEY_INDEX |
1583 IB_QP_MIN_RNR_TIMER |
1584 IB_QP_PATH_MIG_STATE),
1585 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
1586 IB_QP_QKEY),
1587 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
1588 IB_QP_QKEY),
1589 }
1590 }
1591 },
1592 [IB_QPS_SQE] = {
1593 [IB_QPS_RESET] = { .valid = 1 },
1594 [IB_QPS_ERR] = { .valid = 1 },
1595 [IB_QPS_RTS] = {
1596 .valid = 1,
1597 .opt_param = {
1598 [IB_QPT_UD] = (IB_QP_CUR_STATE |
1599 IB_QP_QKEY),
1600 [IB_QPT_UC] = (IB_QP_CUR_STATE |
1601 IB_QP_ACCESS_FLAGS),
1602 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
1603 IB_QP_QKEY),
1604 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
1605 IB_QP_QKEY),
1606 }
1607 }
1608 },
1609 [IB_QPS_ERR] = {
1610 [IB_QPS_RESET] = { .valid = 1 },
1611 [IB_QPS_ERR] = { .valid = 1 }
1612 }
1613};
1614
1615bool ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
1616 enum ib_qp_type type, enum ib_qp_attr_mask mask)
1617{
1618 enum ib_qp_attr_mask req_param, opt_param;
1619
1620 if (mask & IB_QP_CUR_STATE &&
1621 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
1622 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
1623 return false;
1624
1625 if (!qp_state_table[cur_state][next_state].valid)
1626 return false;
1627
1628 req_param = qp_state_table[cur_state][next_state].req_param[type];
1629 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
1630
1631 if ((mask & req_param) != req_param)
1632 return false;
1633
1634 if (mask & ~(req_param | opt_param | IB_QP_STATE))
1635 return false;
1636
1637 return true;
1638}
1639EXPORT_SYMBOL(ib_modify_qp_is_ok);
1640
1641/**
1642 * ib_resolve_eth_dmac - Resolve destination mac address
1643 * @device: Device to consider
1644 * @ah_attr: address handle attribute which describes the
1645 * source and destination parameters
1646 * ib_resolve_eth_dmac() resolves destination mac address and L3 hop limit It
1647 * returns 0 on success or appropriate error code. It initializes the
1648 * necessary ah_attr fields when call is successful.
1649 */
1650static int ib_resolve_eth_dmac(struct ib_device *device,
1651 struct rdma_ah_attr *ah_attr)
1652{
1653 int ret = 0;
1654
1655 if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {
1656 if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) {
1657 __be32 addr = 0;
1658
1659 memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4);
1660 ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac);
1661 } else {
1662 ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw,
1663 (char *)ah_attr->roce.dmac);
1664 }
1665 } else {
1666 ret = ib_resolve_unicast_gid_dmac(device, ah_attr);
1667 }
1668 return ret;
1669}
1670
1671static bool is_qp_type_connected(const struct ib_qp *qp)
1672{
1673 return (qp->qp_type == IB_QPT_UC ||
1674 qp->qp_type == IB_QPT_RC ||
1675 qp->qp_type == IB_QPT_XRC_INI ||
1676 qp->qp_type == IB_QPT_XRC_TGT);
1677}
1678
1679/*
1680 * IB core internal function to perform QP attributes modification.
1681 */
1682static int _ib_modify_qp(struct ib_qp *qp, struct ib_qp_attr *attr,
1683 int attr_mask, struct ib_udata *udata)
1684{
1685 u32 port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
1686 const struct ib_gid_attr *old_sgid_attr_av;
1687 const struct ib_gid_attr *old_sgid_attr_alt_av;
1688 int ret;
1689
1690 attr->xmit_slave = NULL;
1691 if (attr_mask & IB_QP_AV) {
1692 ret = rdma_fill_sgid_attr(qp->device, &attr->ah_attr,
1693 &old_sgid_attr_av);
1694 if (ret)
1695 return ret;
1696
1697 if (attr->ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE &&
1698 is_qp_type_connected(qp)) {
1699 struct net_device *slave;
1700
1701 /*
1702 * If the user provided the qp_attr then we have to
1703 * resolve it. Kerne users have to provide already
1704 * resolved rdma_ah_attr's.
1705 */
1706 if (udata) {
1707 ret = ib_resolve_eth_dmac(qp->device,
1708 &attr->ah_attr);
1709 if (ret)
1710 goto out_av;
1711 }
1712 slave = rdma_lag_get_ah_roce_slave(qp->device,
1713 &attr->ah_attr,
1714 GFP_KERNEL);
1715 if (IS_ERR(slave)) {
1716 ret = PTR_ERR(slave);
1717 goto out_av;
1718 }
1719 attr->xmit_slave = slave;
1720 }
1721 }
1722 if (attr_mask & IB_QP_ALT_PATH) {
1723 /*
1724 * FIXME: This does not track the migration state, so if the
1725 * user loads a new alternate path after the HW has migrated
1726 * from primary->alternate we will keep the wrong
1727 * references. This is OK for IB because the reference
1728 * counting does not serve any functional purpose.
1729 */
1730 ret = rdma_fill_sgid_attr(qp->device, &attr->alt_ah_attr,
1731 &old_sgid_attr_alt_av);
1732 if (ret)
1733 goto out_av;
1734
1735 /*
1736 * Today the core code can only handle alternate paths and APM
1737 * for IB. Ban them in roce mode.
1738 */
1739 if (!(rdma_protocol_ib(qp->device,
1740 attr->alt_ah_attr.port_num) &&
1741 rdma_protocol_ib(qp->device, port))) {
1742 ret = -EINVAL;
1743 goto out;
1744 }
1745 }
1746
1747 if (rdma_ib_or_roce(qp->device, port)) {
1748 if (attr_mask & IB_QP_RQ_PSN && attr->rq_psn & ~0xffffff) {
1749 dev_warn(&qp->device->dev,
1750 "%s rq_psn overflow, masking to 24 bits\n",
1751 __func__);
1752 attr->rq_psn &= 0xffffff;
1753 }
1754
1755 if (attr_mask & IB_QP_SQ_PSN && attr->sq_psn & ~0xffffff) {
1756 dev_warn(&qp->device->dev,
1757 " %s sq_psn overflow, masking to 24 bits\n",
1758 __func__);
1759 attr->sq_psn &= 0xffffff;
1760 }
1761 }
1762
1763 /*
1764 * Bind this qp to a counter automatically based on the rdma counter
1765 * rules. This only set in RST2INIT with port specified
1766 */
1767 if (!qp->counter && (attr_mask & IB_QP_PORT) &&
1768 ((attr_mask & IB_QP_STATE) && attr->qp_state == IB_QPS_INIT))
1769 rdma_counter_bind_qp_auto(qp, attr->port_num);
1770
1771 ret = ib_security_modify_qp(qp, attr, attr_mask, udata);
1772 if (ret)
1773 goto out;
1774
1775 if (attr_mask & IB_QP_PORT)
1776 qp->port = attr->port_num;
1777 if (attr_mask & IB_QP_AV)
1778 qp->av_sgid_attr =
1779 rdma_update_sgid_attr(&attr->ah_attr, qp->av_sgid_attr);
1780 if (attr_mask & IB_QP_ALT_PATH)
1781 qp->alt_path_sgid_attr = rdma_update_sgid_attr(
1782 &attr->alt_ah_attr, qp->alt_path_sgid_attr);
1783
1784out:
1785 if (attr_mask & IB_QP_ALT_PATH)
1786 rdma_unfill_sgid_attr(&attr->alt_ah_attr, old_sgid_attr_alt_av);
1787out_av:
1788 if (attr_mask & IB_QP_AV) {
1789 rdma_lag_put_ah_roce_slave(attr->xmit_slave);
1790 rdma_unfill_sgid_attr(&attr->ah_attr, old_sgid_attr_av);
1791 }
1792 return ret;
1793}
1794
1795/**
1796 * ib_modify_qp_with_udata - Modifies the attributes for the specified QP.
1797 * @ib_qp: The QP to modify.
1798 * @attr: On input, specifies the QP attributes to modify. On output,
1799 * the current values of selected QP attributes are returned.
1800 * @attr_mask: A bit-mask used to specify which attributes of the QP
1801 * are being modified.
1802 * @udata: pointer to user's input output buffer information
1803 * are being modified.
1804 * It returns 0 on success and returns appropriate error code on error.
1805 */
1806int ib_modify_qp_with_udata(struct ib_qp *ib_qp, struct ib_qp_attr *attr,
1807 int attr_mask, struct ib_udata *udata)
1808{
1809 return _ib_modify_qp(ib_qp->real_qp, attr, attr_mask, udata);
1810}
1811EXPORT_SYMBOL(ib_modify_qp_with_udata);
1812
1813int ib_get_eth_speed(struct ib_device *dev, u32 port_num, u16 *speed, u8 *width)
1814{
1815 int rc;
1816 u32 netdev_speed;
1817 struct net_device *netdev;
1818 struct ethtool_link_ksettings lksettings;
1819
1820 if (rdma_port_get_link_layer(dev, port_num) != IB_LINK_LAYER_ETHERNET)
1821 return -EINVAL;
1822
1823 netdev = ib_device_get_netdev(dev, port_num);
1824 if (!netdev)
1825 return -ENODEV;
1826
1827 rtnl_lock();
1828 rc = __ethtool_get_link_ksettings(netdev, &lksettings);
1829 rtnl_unlock();
1830
1831 dev_put(netdev);
1832
1833 if (!rc && lksettings.base.speed != (u32)SPEED_UNKNOWN) {
1834 netdev_speed = lksettings.base.speed;
1835 } else {
1836 netdev_speed = SPEED_1000;
1837 pr_warn("%s speed is unknown, defaulting to %u\n", netdev->name,
1838 netdev_speed);
1839 }
1840
1841 if (netdev_speed <= SPEED_1000) {
1842 *width = IB_WIDTH_1X;
1843 *speed = IB_SPEED_SDR;
1844 } else if (netdev_speed <= SPEED_10000) {
1845 *width = IB_WIDTH_1X;
1846 *speed = IB_SPEED_FDR10;
1847 } else if (netdev_speed <= SPEED_20000) {
1848 *width = IB_WIDTH_4X;
1849 *speed = IB_SPEED_DDR;
1850 } else if (netdev_speed <= SPEED_25000) {
1851 *width = IB_WIDTH_1X;
1852 *speed = IB_SPEED_EDR;
1853 } else if (netdev_speed <= SPEED_40000) {
1854 *width = IB_WIDTH_4X;
1855 *speed = IB_SPEED_FDR10;
1856 } else {
1857 *width = IB_WIDTH_4X;
1858 *speed = IB_SPEED_EDR;
1859 }
1860
1861 return 0;
1862}
1863EXPORT_SYMBOL(ib_get_eth_speed);
1864
1865int ib_modify_qp(struct ib_qp *qp,
1866 struct ib_qp_attr *qp_attr,
1867 int qp_attr_mask)
1868{
1869 return _ib_modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
1870}
1871EXPORT_SYMBOL(ib_modify_qp);
1872
1873int ib_query_qp(struct ib_qp *qp,
1874 struct ib_qp_attr *qp_attr,
1875 int qp_attr_mask,
1876 struct ib_qp_init_attr *qp_init_attr)
1877{
1878 qp_attr->ah_attr.grh.sgid_attr = NULL;
1879 qp_attr->alt_ah_attr.grh.sgid_attr = NULL;
1880
1881 return qp->device->ops.query_qp ?
1882 qp->device->ops.query_qp(qp->real_qp, qp_attr, qp_attr_mask,
1883 qp_init_attr) : -EOPNOTSUPP;
1884}
1885EXPORT_SYMBOL(ib_query_qp);
1886
1887int ib_close_qp(struct ib_qp *qp)
1888{
1889 struct ib_qp *real_qp;
1890 unsigned long flags;
1891
1892 real_qp = qp->real_qp;
1893 if (real_qp == qp)
1894 return -EINVAL;
1895
1896 spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags);
1897 list_del(&qp->open_list);
1898 spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags);
1899
1900 atomic_dec(&real_qp->usecnt);
1901 if (qp->qp_sec)
1902 ib_close_shared_qp_security(qp->qp_sec);
1903 kfree(qp);
1904
1905 return 0;
1906}
1907EXPORT_SYMBOL(ib_close_qp);
1908
1909static int __ib_destroy_shared_qp(struct ib_qp *qp)
1910{
1911 struct ib_xrcd *xrcd;
1912 struct ib_qp *real_qp;
1913 int ret;
1914
1915 real_qp = qp->real_qp;
1916 xrcd = real_qp->xrcd;
1917 down_write(&xrcd->tgt_qps_rwsem);
1918 ib_close_qp(qp);
1919 if (atomic_read(&real_qp->usecnt) == 0)
1920 xa_erase(&xrcd->tgt_qps, real_qp->qp_num);
1921 else
1922 real_qp = NULL;
1923 up_write(&xrcd->tgt_qps_rwsem);
1924
1925 if (real_qp) {
1926 ret = ib_destroy_qp(real_qp);
1927 if (!ret)
1928 atomic_dec(&xrcd->usecnt);
1929 }
1930
1931 return 0;
1932}
1933
1934int ib_destroy_qp_user(struct ib_qp *qp, struct ib_udata *udata)
1935{
1936 const struct ib_gid_attr *alt_path_sgid_attr = qp->alt_path_sgid_attr;
1937 const struct ib_gid_attr *av_sgid_attr = qp->av_sgid_attr;
1938 struct ib_pd *pd;
1939 struct ib_cq *scq, *rcq;
1940 struct ib_srq *srq;
1941 struct ib_rwq_ind_table *ind_tbl;
1942 struct ib_qp_security *sec;
1943 int ret;
1944
1945 WARN_ON_ONCE(qp->mrs_used > 0);
1946
1947 if (atomic_read(&qp->usecnt))
1948 return -EBUSY;
1949
1950 if (qp->real_qp != qp)
1951 return __ib_destroy_shared_qp(qp);
1952
1953 pd = qp->pd;
1954 scq = qp->send_cq;
1955 rcq = qp->recv_cq;
1956 srq = qp->srq;
1957 ind_tbl = qp->rwq_ind_tbl;
1958 sec = qp->qp_sec;
1959 if (sec)
1960 ib_destroy_qp_security_begin(sec);
1961
1962 if (!qp->uobject)
1963 rdma_rw_cleanup_mrs(qp);
1964
1965 rdma_counter_unbind_qp(qp, true);
1966 rdma_restrack_del(&qp->res);
1967 ret = qp->device->ops.destroy_qp(qp, udata);
1968 if (!ret) {
1969 if (alt_path_sgid_attr)
1970 rdma_put_gid_attr(alt_path_sgid_attr);
1971 if (av_sgid_attr)
1972 rdma_put_gid_attr(av_sgid_attr);
1973 if (pd)
1974 atomic_dec(&pd->usecnt);
1975 if (scq)
1976 atomic_dec(&scq->usecnt);
1977 if (rcq)
1978 atomic_dec(&rcq->usecnt);
1979 if (srq)
1980 atomic_dec(&srq->usecnt);
1981 if (ind_tbl)
1982 atomic_dec(&ind_tbl->usecnt);
1983 if (sec)
1984 ib_destroy_qp_security_end(sec);
1985 } else {
1986 if (sec)
1987 ib_destroy_qp_security_abort(sec);
1988 }
1989
1990 return ret;
1991}
1992EXPORT_SYMBOL(ib_destroy_qp_user);
1993
1994/* Completion queues */
1995
1996struct ib_cq *__ib_create_cq(struct ib_device *device,
1997 ib_comp_handler comp_handler,
1998 void (*event_handler)(struct ib_event *, void *),
1999 void *cq_context,
2000 const struct ib_cq_init_attr *cq_attr,
2001 const char *caller)
2002{
2003 struct ib_cq *cq;
2004 int ret;
2005
2006 cq = rdma_zalloc_drv_obj(device, ib_cq);
2007 if (!cq)
2008 return ERR_PTR(-ENOMEM);
2009
2010 cq->device = device;
2011 cq->uobject = NULL;
2012 cq->comp_handler = comp_handler;
2013 cq->event_handler = event_handler;
2014 cq->cq_context = cq_context;
2015 atomic_set(&cq->usecnt, 0);
2016
2017 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);
2018 rdma_restrack_set_name(&cq->res, caller);
2019
2020 ret = device->ops.create_cq(cq, cq_attr, NULL);
2021 if (ret) {
2022 rdma_restrack_put(&cq->res);
2023 kfree(cq);
2024 return ERR_PTR(ret);
2025 }
2026
2027 rdma_restrack_add(&cq->res);
2028 return cq;
2029}
2030EXPORT_SYMBOL(__ib_create_cq);
2031
2032int rdma_set_cq_moderation(struct ib_cq *cq, u16 cq_count, u16 cq_period)
2033{
2034 if (cq->shared)
2035 return -EOPNOTSUPP;
2036
2037 return cq->device->ops.modify_cq ?
2038 cq->device->ops.modify_cq(cq, cq_count,
2039 cq_period) : -EOPNOTSUPP;
2040}
2041EXPORT_SYMBOL(rdma_set_cq_moderation);
2042
2043int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata)
2044{
2045 int ret;
2046
2047 if (WARN_ON_ONCE(cq->shared))
2048 return -EOPNOTSUPP;
2049
2050 if (atomic_read(&cq->usecnt))
2051 return -EBUSY;
2052
2053 ret = cq->device->ops.destroy_cq(cq, udata);
2054 if (ret)
2055 return ret;
2056
2057 rdma_restrack_del(&cq->res);
2058 kfree(cq);
2059 return ret;
2060}
2061EXPORT_SYMBOL(ib_destroy_cq_user);
2062
2063int ib_resize_cq(struct ib_cq *cq, int cqe)
2064{
2065 if (cq->shared)
2066 return -EOPNOTSUPP;
2067
2068 return cq->device->ops.resize_cq ?
2069 cq->device->ops.resize_cq(cq, cqe, NULL) : -EOPNOTSUPP;
2070}
2071EXPORT_SYMBOL(ib_resize_cq);
2072
2073/* Memory regions */
2074
2075struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
2076 u64 virt_addr, int access_flags)
2077{
2078 struct ib_mr *mr;
2079
2080 if (access_flags & IB_ACCESS_ON_DEMAND) {
2081 if (!(pd->device->attrs.device_cap_flags &
2082 IB_DEVICE_ON_DEMAND_PAGING)) {
2083 pr_debug("ODP support not available\n");
2084 return ERR_PTR(-EINVAL);
2085 }
2086 }
2087
2088 mr = pd->device->ops.reg_user_mr(pd, start, length, virt_addr,
2089 access_flags, NULL);
2090
2091 if (IS_ERR(mr))
2092 return mr;
2093
2094 mr->device = pd->device;
2095 mr->pd = pd;
2096 mr->dm = NULL;
2097 atomic_inc(&pd->usecnt);
2098
2099 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
2100 rdma_restrack_parent_name(&mr->res, &pd->res);
2101 rdma_restrack_add(&mr->res);
2102
2103 return mr;
2104}
2105EXPORT_SYMBOL(ib_reg_user_mr);
2106
2107int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice,
2108 u32 flags, struct ib_sge *sg_list, u32 num_sge)
2109{
2110 if (!pd->device->ops.advise_mr)
2111 return -EOPNOTSUPP;
2112
2113 if (!num_sge)
2114 return 0;
2115
2116 return pd->device->ops.advise_mr(pd, advice, flags, sg_list, num_sge,
2117 NULL);
2118}
2119EXPORT_SYMBOL(ib_advise_mr);
2120
2121int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata)
2122{
2123 struct ib_pd *pd = mr->pd;
2124 struct ib_dm *dm = mr->dm;
2125 struct ib_sig_attrs *sig_attrs = mr->sig_attrs;
2126 int ret;
2127
2128 trace_mr_dereg(mr);
2129 rdma_restrack_del(&mr->res);
2130 ret = mr->device->ops.dereg_mr(mr, udata);
2131 if (!ret) {
2132 atomic_dec(&pd->usecnt);
2133 if (dm)
2134 atomic_dec(&dm->usecnt);
2135 kfree(sig_attrs);
2136 }
2137
2138 return ret;
2139}
2140EXPORT_SYMBOL(ib_dereg_mr_user);
2141
2142/**
2143 * ib_alloc_mr() - Allocates a memory region
2144 * @pd: protection domain associated with the region
2145 * @mr_type: memory region type
2146 * @max_num_sg: maximum sg entries available for registration.
2147 *
2148 * Notes:
2149 * Memory registeration page/sg lists must not exceed max_num_sg.
2150 * For mr_type IB_MR_TYPE_MEM_REG, the total length cannot exceed
2151 * max_num_sg * used_page_size.
2152 *
2153 */
2154struct ib_mr *ib_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
2155 u32 max_num_sg)
2156{
2157 struct ib_mr *mr;
2158
2159 if (!pd->device->ops.alloc_mr) {
2160 mr = ERR_PTR(-EOPNOTSUPP);
2161 goto out;
2162 }
2163
2164 if (mr_type == IB_MR_TYPE_INTEGRITY) {
2165 WARN_ON_ONCE(1);
2166 mr = ERR_PTR(-EINVAL);
2167 goto out;
2168 }
2169
2170 mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg);
2171 if (IS_ERR(mr))
2172 goto out;
2173
2174 mr->device = pd->device;
2175 mr->pd = pd;
2176 mr->dm = NULL;
2177 mr->uobject = NULL;
2178 atomic_inc(&pd->usecnt);
2179 mr->need_inval = false;
2180 mr->type = mr_type;
2181 mr->sig_attrs = NULL;
2182
2183 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
2184 rdma_restrack_parent_name(&mr->res, &pd->res);
2185 rdma_restrack_add(&mr->res);
2186out:
2187 trace_mr_alloc(pd, mr_type, max_num_sg, mr);
2188 return mr;
2189}
2190EXPORT_SYMBOL(ib_alloc_mr);
2191
2192/**
2193 * ib_alloc_mr_integrity() - Allocates an integrity memory region
2194 * @pd: protection domain associated with the region
2195 * @max_num_data_sg: maximum data sg entries available for registration
2196 * @max_num_meta_sg: maximum metadata sg entries available for
2197 * registration
2198 *
2199 * Notes:
2200 * Memory registration page/sg lists must not exceed max_num_sg,
2201 * also the integrity page/sg lists must not exceed max_num_meta_sg.
2202 *
2203 */
2204struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
2205 u32 max_num_data_sg,
2206 u32 max_num_meta_sg)
2207{
2208 struct ib_mr *mr;
2209 struct ib_sig_attrs *sig_attrs;
2210
2211 if (!pd->device->ops.alloc_mr_integrity ||
2212 !pd->device->ops.map_mr_sg_pi) {
2213 mr = ERR_PTR(-EOPNOTSUPP);
2214 goto out;
2215 }
2216
2217 if (!max_num_meta_sg) {
2218 mr = ERR_PTR(-EINVAL);
2219 goto out;
2220 }
2221
2222 sig_attrs = kzalloc(sizeof(struct ib_sig_attrs), GFP_KERNEL);
2223 if (!sig_attrs) {
2224 mr = ERR_PTR(-ENOMEM);
2225 goto out;
2226 }
2227
2228 mr = pd->device->ops.alloc_mr_integrity(pd, max_num_data_sg,
2229 max_num_meta_sg);
2230 if (IS_ERR(mr)) {
2231 kfree(sig_attrs);
2232 goto out;
2233 }
2234
2235 mr->device = pd->device;
2236 mr->pd = pd;
2237 mr->dm = NULL;
2238 mr->uobject = NULL;
2239 atomic_inc(&pd->usecnt);
2240 mr->need_inval = false;
2241 mr->type = IB_MR_TYPE_INTEGRITY;
2242 mr->sig_attrs = sig_attrs;
2243
2244 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
2245 rdma_restrack_parent_name(&mr->res, &pd->res);
2246 rdma_restrack_add(&mr->res);
2247out:
2248 trace_mr_integ_alloc(pd, max_num_data_sg, max_num_meta_sg, mr);
2249 return mr;
2250}
2251EXPORT_SYMBOL(ib_alloc_mr_integrity);
2252
2253/* Multicast groups */
2254
2255static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid)
2256{
2257 struct ib_qp_init_attr init_attr = {};
2258 struct ib_qp_attr attr = {};
2259 int num_eth_ports = 0;
2260 unsigned int port;
2261
2262 /* If QP state >= init, it is assigned to a port and we can check this
2263 * port only.
2264 */
2265 if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) {
2266 if (attr.qp_state >= IB_QPS_INIT) {
2267 if (rdma_port_get_link_layer(qp->device, attr.port_num) !=
2268 IB_LINK_LAYER_INFINIBAND)
2269 return true;
2270 goto lid_check;
2271 }
2272 }
2273
2274 /* Can't get a quick answer, iterate over all ports */
2275 rdma_for_each_port(qp->device, port)
2276 if (rdma_port_get_link_layer(qp->device, port) !=
2277 IB_LINK_LAYER_INFINIBAND)
2278 num_eth_ports++;
2279
2280 /* If we have at lease one Ethernet port, RoCE annex declares that
2281 * multicast LID should be ignored. We can't tell at this step if the
2282 * QP belongs to an IB or Ethernet port.
2283 */
2284 if (num_eth_ports)
2285 return true;
2286
2287 /* If all the ports are IB, we can check according to IB spec. */
2288lid_check:
2289 return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
2290 lid == be16_to_cpu(IB_LID_PERMISSIVE));
2291}
2292
2293int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
2294{
2295 int ret;
2296
2297 if (!qp->device->ops.attach_mcast)
2298 return -EOPNOTSUPP;
2299
2300 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
2301 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
2302 return -EINVAL;
2303
2304 ret = qp->device->ops.attach_mcast(qp, gid, lid);
2305 if (!ret)
2306 atomic_inc(&qp->usecnt);
2307 return ret;
2308}
2309EXPORT_SYMBOL(ib_attach_mcast);
2310
2311int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
2312{
2313 int ret;
2314
2315 if (!qp->device->ops.detach_mcast)
2316 return -EOPNOTSUPP;
2317
2318 if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) ||
2319 qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid))
2320 return -EINVAL;
2321
2322 ret = qp->device->ops.detach_mcast(qp, gid, lid);
2323 if (!ret)
2324 atomic_dec(&qp->usecnt);
2325 return ret;
2326}
2327EXPORT_SYMBOL(ib_detach_mcast);
2328
2329/**
2330 * ib_alloc_xrcd_user - Allocates an XRC domain.
2331 * @device: The device on which to allocate the XRC domain.
2332 * @inode: inode to connect XRCD
2333 * @udata: Valid user data or NULL for kernel object
2334 */
2335struct ib_xrcd *ib_alloc_xrcd_user(struct ib_device *device,
2336 struct inode *inode, struct ib_udata *udata)
2337{
2338 struct ib_xrcd *xrcd;
2339 int ret;
2340
2341 if (!device->ops.alloc_xrcd)
2342 return ERR_PTR(-EOPNOTSUPP);
2343
2344 xrcd = rdma_zalloc_drv_obj(device, ib_xrcd);
2345 if (!xrcd)
2346 return ERR_PTR(-ENOMEM);
2347
2348 xrcd->device = device;
2349 xrcd->inode = inode;
2350 atomic_set(&xrcd->usecnt, 0);
2351 init_rwsem(&xrcd->tgt_qps_rwsem);
2352 xa_init(&xrcd->tgt_qps);
2353
2354 ret = device->ops.alloc_xrcd(xrcd, udata);
2355 if (ret)
2356 goto err;
2357 return xrcd;
2358err:
2359 kfree(xrcd);
2360 return ERR_PTR(ret);
2361}
2362EXPORT_SYMBOL(ib_alloc_xrcd_user);
2363
2364/**
2365 * ib_dealloc_xrcd_user - Deallocates an XRC domain.
2366 * @xrcd: The XRC domain to deallocate.
2367 * @udata: Valid user data or NULL for kernel object
2368 */
2369int ib_dealloc_xrcd_user(struct ib_xrcd *xrcd, struct ib_udata *udata)
2370{
2371 int ret;
2372
2373 if (atomic_read(&xrcd->usecnt))
2374 return -EBUSY;
2375
2376 WARN_ON(!xa_empty(&xrcd->tgt_qps));
2377 ret = xrcd->device->ops.dealloc_xrcd(xrcd, udata);
2378 if (ret)
2379 return ret;
2380 kfree(xrcd);
2381 return ret;
2382}
2383EXPORT_SYMBOL(ib_dealloc_xrcd_user);
2384
2385/**
2386 * ib_create_wq - Creates a WQ associated with the specified protection
2387 * domain.
2388 * @pd: The protection domain associated with the WQ.
2389 * @wq_attr: A list of initial attributes required to create the
2390 * WQ. If WQ creation succeeds, then the attributes are updated to
2391 * the actual capabilities of the created WQ.
2392 *
2393 * wq_attr->max_wr and wq_attr->max_sge determine
2394 * the requested size of the WQ, and set to the actual values allocated
2395 * on return.
2396 * If ib_create_wq() succeeds, then max_wr and max_sge will always be
2397 * at least as large as the requested values.
2398 */
2399struct ib_wq *ib_create_wq(struct ib_pd *pd,
2400 struct ib_wq_init_attr *wq_attr)
2401{
2402 struct ib_wq *wq;
2403
2404 if (!pd->device->ops.create_wq)
2405 return ERR_PTR(-EOPNOTSUPP);
2406
2407 wq = pd->device->ops.create_wq(pd, wq_attr, NULL);
2408 if (!IS_ERR(wq)) {
2409 wq->event_handler = wq_attr->event_handler;
2410 wq->wq_context = wq_attr->wq_context;
2411 wq->wq_type = wq_attr->wq_type;
2412 wq->cq = wq_attr->cq;
2413 wq->device = pd->device;
2414 wq->pd = pd;
2415 wq->uobject = NULL;
2416 atomic_inc(&pd->usecnt);
2417 atomic_inc(&wq_attr->cq->usecnt);
2418 atomic_set(&wq->usecnt, 0);
2419 }
2420 return wq;
2421}
2422EXPORT_SYMBOL(ib_create_wq);
2423
2424/**
2425 * ib_destroy_wq_user - Destroys the specified user WQ.
2426 * @wq: The WQ to destroy.
2427 * @udata: Valid user data
2428 */
2429int ib_destroy_wq_user(struct ib_wq *wq, struct ib_udata *udata)
2430{
2431 struct ib_cq *cq = wq->cq;
2432 struct ib_pd *pd = wq->pd;
2433 int ret;
2434
2435 if (atomic_read(&wq->usecnt))
2436 return -EBUSY;
2437
2438 ret = wq->device->ops.destroy_wq(wq, udata);
2439 if (ret)
2440 return ret;
2441
2442 atomic_dec(&pd->usecnt);
2443 atomic_dec(&cq->usecnt);
2444 return ret;
2445}
2446EXPORT_SYMBOL(ib_destroy_wq_user);
2447
2448int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
2449 struct ib_mr_status *mr_status)
2450{
2451 if (!mr->device->ops.check_mr_status)
2452 return -EOPNOTSUPP;
2453
2454 return mr->device->ops.check_mr_status(mr, check_mask, mr_status);
2455}
2456EXPORT_SYMBOL(ib_check_mr_status);
2457
2458int ib_set_vf_link_state(struct ib_device *device, int vf, u32 port,
2459 int state)
2460{
2461 if (!device->ops.set_vf_link_state)
2462 return -EOPNOTSUPP;
2463
2464 return device->ops.set_vf_link_state(device, vf, port, state);
2465}
2466EXPORT_SYMBOL(ib_set_vf_link_state);
2467
2468int ib_get_vf_config(struct ib_device *device, int vf, u32 port,
2469 struct ifla_vf_info *info)
2470{
2471 if (!device->ops.get_vf_config)
2472 return -EOPNOTSUPP;
2473
2474 return device->ops.get_vf_config(device, vf, port, info);
2475}
2476EXPORT_SYMBOL(ib_get_vf_config);
2477
2478int ib_get_vf_stats(struct ib_device *device, int vf, u32 port,
2479 struct ifla_vf_stats *stats)
2480{
2481 if (!device->ops.get_vf_stats)
2482 return -EOPNOTSUPP;
2483
2484 return device->ops.get_vf_stats(device, vf, port, stats);
2485}
2486EXPORT_SYMBOL(ib_get_vf_stats);
2487
2488int ib_set_vf_guid(struct ib_device *device, int vf, u32 port, u64 guid,
2489 int type)
2490{
2491 if (!device->ops.set_vf_guid)
2492 return -EOPNOTSUPP;
2493
2494 return device->ops.set_vf_guid(device, vf, port, guid, type);
2495}
2496EXPORT_SYMBOL(ib_set_vf_guid);
2497
2498int ib_get_vf_guid(struct ib_device *device, int vf, u32 port,
2499 struct ifla_vf_guid *node_guid,
2500 struct ifla_vf_guid *port_guid)
2501{
2502 if (!device->ops.get_vf_guid)
2503 return -EOPNOTSUPP;
2504
2505 return device->ops.get_vf_guid(device, vf, port, node_guid, port_guid);
2506}
2507EXPORT_SYMBOL(ib_get_vf_guid);
2508/**
2509 * ib_map_mr_sg_pi() - Map the dma mapped SG lists for PI (protection
2510 * information) and set an appropriate memory region for registration.
2511 * @mr: memory region
2512 * @data_sg: dma mapped scatterlist for data
2513 * @data_sg_nents: number of entries in data_sg
2514 * @data_sg_offset: offset in bytes into data_sg
2515 * @meta_sg: dma mapped scatterlist for metadata
2516 * @meta_sg_nents: number of entries in meta_sg
2517 * @meta_sg_offset: offset in bytes into meta_sg
2518 * @page_size: page vector desired page size
2519 *
2520 * Constraints:
2521 * - The MR must be allocated with type IB_MR_TYPE_INTEGRITY.
2522 *
2523 * Return: 0 on success.
2524 *
2525 * After this completes successfully, the memory region
2526 * is ready for registration.
2527 */
2528int ib_map_mr_sg_pi(struct ib_mr *mr, struct scatterlist *data_sg,
2529 int data_sg_nents, unsigned int *data_sg_offset,
2530 struct scatterlist *meta_sg, int meta_sg_nents,
2531 unsigned int *meta_sg_offset, unsigned int page_size)
2532{
2533 if (unlikely(!mr->device->ops.map_mr_sg_pi ||
2534 WARN_ON_ONCE(mr->type != IB_MR_TYPE_INTEGRITY)))
2535 return -EOPNOTSUPP;
2536
2537 mr->page_size = page_size;
2538
2539 return mr->device->ops.map_mr_sg_pi(mr, data_sg, data_sg_nents,
2540 data_sg_offset, meta_sg,
2541 meta_sg_nents, meta_sg_offset);
2542}
2543EXPORT_SYMBOL(ib_map_mr_sg_pi);
2544
2545/**
2546 * ib_map_mr_sg() - Map the largest prefix of a dma mapped SG list
2547 * and set it the memory region.
2548 * @mr: memory region
2549 * @sg: dma mapped scatterlist
2550 * @sg_nents: number of entries in sg
2551 * @sg_offset: offset in bytes into sg
2552 * @page_size: page vector desired page size
2553 *
2554 * Constraints:
2555 *
2556 * - The first sg element is allowed to have an offset.
2557 * - Each sg element must either be aligned to page_size or virtually
2558 * contiguous to the previous element. In case an sg element has a
2559 * non-contiguous offset, the mapping prefix will not include it.
2560 * - The last sg element is allowed to have length less than page_size.
2561 * - If sg_nents total byte length exceeds the mr max_num_sge * page_size
2562 * then only max_num_sg entries will be mapped.
2563 * - If the MR was allocated with type IB_MR_TYPE_SG_GAPS, none of these
2564 * constraints holds and the page_size argument is ignored.
2565 *
2566 * Returns the number of sg elements that were mapped to the memory region.
2567 *
2568 * After this completes successfully, the memory region
2569 * is ready for registration.
2570 */
2571int ib_map_mr_sg(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
2572 unsigned int *sg_offset, unsigned int page_size)
2573{
2574 if (unlikely(!mr->device->ops.map_mr_sg))
2575 return -EOPNOTSUPP;
2576
2577 mr->page_size = page_size;
2578
2579 return mr->device->ops.map_mr_sg(mr, sg, sg_nents, sg_offset);
2580}
2581EXPORT_SYMBOL(ib_map_mr_sg);
2582
2583/**
2584 * ib_sg_to_pages() - Convert the largest prefix of a sg list
2585 * to a page vector
2586 * @mr: memory region
2587 * @sgl: dma mapped scatterlist
2588 * @sg_nents: number of entries in sg
2589 * @sg_offset_p: ==== =======================================================
2590 * IN start offset in bytes into sg
2591 * OUT offset in bytes for element n of the sg of the first
2592 * byte that has not been processed where n is the return
2593 * value of this function.
2594 * ==== =======================================================
2595 * @set_page: driver page assignment function pointer
2596 *
2597 * Core service helper for drivers to convert the largest
2598 * prefix of given sg list to a page vector. The sg list
2599 * prefix converted is the prefix that meet the requirements
2600 * of ib_map_mr_sg.
2601 *
2602 * Returns the number of sg elements that were assigned to
2603 * a page vector.
2604 */
2605int ib_sg_to_pages(struct ib_mr *mr, struct scatterlist *sgl, int sg_nents,
2606 unsigned int *sg_offset_p, int (*set_page)(struct ib_mr *, u64))
2607{
2608 struct scatterlist *sg;
2609 u64 last_end_dma_addr = 0;
2610 unsigned int sg_offset = sg_offset_p ? *sg_offset_p : 0;
2611 unsigned int last_page_off = 0;
2612 u64 page_mask = ~((u64)mr->page_size - 1);
2613 int i, ret;
2614
2615 if (unlikely(sg_nents <= 0 || sg_offset > sg_dma_len(&sgl[0])))
2616 return -EINVAL;
2617
2618 mr->iova = sg_dma_address(&sgl[0]) + sg_offset;
2619 mr->length = 0;
2620
2621 for_each_sg(sgl, sg, sg_nents, i) {
2622 u64 dma_addr = sg_dma_address(sg) + sg_offset;
2623 u64 prev_addr = dma_addr;
2624 unsigned int dma_len = sg_dma_len(sg) - sg_offset;
2625 u64 end_dma_addr = dma_addr + dma_len;
2626 u64 page_addr = dma_addr & page_mask;
2627
2628 /*
2629 * For the second and later elements, check whether either the
2630 * end of element i-1 or the start of element i is not aligned
2631 * on a page boundary.
2632 */
2633 if (i && (last_page_off != 0 || page_addr != dma_addr)) {
2634 /* Stop mapping if there is a gap. */
2635 if (last_end_dma_addr != dma_addr)
2636 break;
2637
2638 /*
2639 * Coalesce this element with the last. If it is small
2640 * enough just update mr->length. Otherwise start
2641 * mapping from the next page.
2642 */
2643 goto next_page;
2644 }
2645
2646 do {
2647 ret = set_page(mr, page_addr);
2648 if (unlikely(ret < 0)) {
2649 sg_offset = prev_addr - sg_dma_address(sg);
2650 mr->length += prev_addr - dma_addr;
2651 if (sg_offset_p)
2652 *sg_offset_p = sg_offset;
2653 return i || sg_offset ? i : ret;
2654 }
2655 prev_addr = page_addr;
2656next_page:
2657 page_addr += mr->page_size;
2658 } while (page_addr < end_dma_addr);
2659
2660 mr->length += dma_len;
2661 last_end_dma_addr = end_dma_addr;
2662 last_page_off = end_dma_addr & ~page_mask;
2663
2664 sg_offset = 0;
2665 }
2666
2667 if (sg_offset_p)
2668 *sg_offset_p = 0;
2669 return i;
2670}
2671EXPORT_SYMBOL(ib_sg_to_pages);
2672
2673struct ib_drain_cqe {
2674 struct ib_cqe cqe;
2675 struct completion done;
2676};
2677
2678static void ib_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc)
2679{
2680 struct ib_drain_cqe *cqe = container_of(wc->wr_cqe, struct ib_drain_cqe,
2681 cqe);
2682
2683 complete(&cqe->done);
2684}
2685
2686/*
2687 * Post a WR and block until its completion is reaped for the SQ.
2688 */
2689static void __ib_drain_sq(struct ib_qp *qp)
2690{
2691 struct ib_cq *cq = qp->send_cq;
2692 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
2693 struct ib_drain_cqe sdrain;
2694 struct ib_rdma_wr swr = {
2695 .wr = {
2696 .next = NULL,
2697 { .wr_cqe = &sdrain.cqe, },
2698 .opcode = IB_WR_RDMA_WRITE,
2699 },
2700 };
2701 int ret;
2702
2703 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2704 if (ret) {
2705 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
2706 return;
2707 }
2708
2709 sdrain.cqe.done = ib_drain_qp_done;
2710 init_completion(&sdrain.done);
2711
2712 ret = ib_post_send(qp, &swr.wr, NULL);
2713 if (ret) {
2714 WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
2715 return;
2716 }
2717
2718 if (cq->poll_ctx == IB_POLL_DIRECT)
2719 while (wait_for_completion_timeout(&sdrain.done, HZ / 10) <= 0)
2720 ib_process_cq_direct(cq, -1);
2721 else
2722 wait_for_completion(&sdrain.done);
2723}
2724
2725/*
2726 * Post a WR and block until its completion is reaped for the RQ.
2727 */
2728static void __ib_drain_rq(struct ib_qp *qp)
2729{
2730 struct ib_cq *cq = qp->recv_cq;
2731 struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
2732 struct ib_drain_cqe rdrain;
2733 struct ib_recv_wr rwr = {};
2734 int ret;
2735
2736 ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
2737 if (ret) {
2738 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2739 return;
2740 }
2741
2742 rwr.wr_cqe = &rdrain.cqe;
2743 rdrain.cqe.done = ib_drain_qp_done;
2744 init_completion(&rdrain.done);
2745
2746 ret = ib_post_recv(qp, &rwr, NULL);
2747 if (ret) {
2748 WARN_ONCE(ret, "failed to drain recv queue: %d\n", ret);
2749 return;
2750 }
2751
2752 if (cq->poll_ctx == IB_POLL_DIRECT)
2753 while (wait_for_completion_timeout(&rdrain.done, HZ / 10) <= 0)
2754 ib_process_cq_direct(cq, -1);
2755 else
2756 wait_for_completion(&rdrain.done);
2757}
2758
2759/**
2760 * ib_drain_sq() - Block until all SQ CQEs have been consumed by the
2761 * application.
2762 * @qp: queue pair to drain
2763 *
2764 * If the device has a provider-specific drain function, then
2765 * call that. Otherwise call the generic drain function
2766 * __ib_drain_sq().
2767 *
2768 * The caller must:
2769 *
2770 * ensure there is room in the CQ and SQ for the drain work request and
2771 * completion.
2772 *
2773 * allocate the CQ using ib_alloc_cq().
2774 *
2775 * ensure that there are no other contexts that are posting WRs concurrently.
2776 * Otherwise the drain is not guaranteed.
2777 */
2778void ib_drain_sq(struct ib_qp *qp)
2779{
2780 if (qp->device->ops.drain_sq)
2781 qp->device->ops.drain_sq(qp);
2782 else
2783 __ib_drain_sq(qp);
2784 trace_cq_drain_complete(qp->send_cq);
2785}
2786EXPORT_SYMBOL(ib_drain_sq);
2787
2788/**
2789 * ib_drain_rq() - Block until all RQ CQEs have been consumed by the
2790 * application.
2791 * @qp: queue pair to drain
2792 *
2793 * If the device has a provider-specific drain function, then
2794 * call that. Otherwise call the generic drain function
2795 * __ib_drain_rq().
2796 *
2797 * The caller must:
2798 *
2799 * ensure there is room in the CQ and RQ for the drain work request and
2800 * completion.
2801 *
2802 * allocate the CQ using ib_alloc_cq().
2803 *
2804 * ensure that there are no other contexts that are posting WRs concurrently.
2805 * Otherwise the drain is not guaranteed.
2806 */
2807void ib_drain_rq(struct ib_qp *qp)
2808{
2809 if (qp->device->ops.drain_rq)
2810 qp->device->ops.drain_rq(qp);
2811 else
2812 __ib_drain_rq(qp);
2813 trace_cq_drain_complete(qp->recv_cq);
2814}
2815EXPORT_SYMBOL(ib_drain_rq);
2816
2817/**
2818 * ib_drain_qp() - Block until all CQEs have been consumed by the
2819 * application on both the RQ and SQ.
2820 * @qp: queue pair to drain
2821 *
2822 * The caller must:
2823 *
2824 * ensure there is room in the CQ(s), SQ, and RQ for drain work requests
2825 * and completions.
2826 *
2827 * allocate the CQs using ib_alloc_cq().
2828 *
2829 * ensure that there are no other contexts that are posting WRs concurrently.
2830 * Otherwise the drain is not guaranteed.
2831 */
2832void ib_drain_qp(struct ib_qp *qp)
2833{
2834 ib_drain_sq(qp);
2835 if (!qp->srq)
2836 ib_drain_rq(qp);
2837}
2838EXPORT_SYMBOL(ib_drain_qp);
2839
2840struct net_device *rdma_alloc_netdev(struct ib_device *device, u32 port_num,
2841 enum rdma_netdev_t type, const char *name,
2842 unsigned char name_assign_type,
2843 void (*setup)(struct net_device *))
2844{
2845 struct rdma_netdev_alloc_params params;
2846 struct net_device *netdev;
2847 int rc;
2848
2849 if (!device->ops.rdma_netdev_get_params)
2850 return ERR_PTR(-EOPNOTSUPP);
2851
2852 rc = device->ops.rdma_netdev_get_params(device, port_num, type,
2853 ¶ms);
2854 if (rc)
2855 return ERR_PTR(rc);
2856
2857 netdev = alloc_netdev_mqs(params.sizeof_priv, name, name_assign_type,
2858 setup, params.txqs, params.rxqs);
2859 if (!netdev)
2860 return ERR_PTR(-ENOMEM);
2861
2862 return netdev;
2863}
2864EXPORT_SYMBOL(rdma_alloc_netdev);
2865
2866int rdma_init_netdev(struct ib_device *device, u32 port_num,
2867 enum rdma_netdev_t type, const char *name,
2868 unsigned char name_assign_type,
2869 void (*setup)(struct net_device *),
2870 struct net_device *netdev)
2871{
2872 struct rdma_netdev_alloc_params params;
2873 int rc;
2874
2875 if (!device->ops.rdma_netdev_get_params)
2876 return -EOPNOTSUPP;
2877
2878 rc = device->ops.rdma_netdev_get_params(device, port_num, type,
2879 ¶ms);
2880 if (rc)
2881 return rc;
2882
2883 return params.initialize_rdma_netdev(device, port_num,
2884 netdev, params.param);
2885}
2886EXPORT_SYMBOL(rdma_init_netdev);
2887
2888void __rdma_block_iter_start(struct ib_block_iter *biter,
2889 struct scatterlist *sglist, unsigned int nents,
2890 unsigned long pgsz)
2891{
2892 memset(biter, 0, sizeof(struct ib_block_iter));
2893 biter->__sg = sglist;
2894 biter->__sg_nents = nents;
2895
2896 /* Driver provides best block size to use */
2897 biter->__pg_bit = __fls(pgsz);
2898}
2899EXPORT_SYMBOL(__rdma_block_iter_start);
2900
2901bool __rdma_block_iter_next(struct ib_block_iter *biter)
2902{
2903 unsigned int block_offset;
2904
2905 if (!biter->__sg_nents || !biter->__sg)
2906 return false;
2907
2908 biter->__dma_addr = sg_dma_address(biter->__sg) + biter->__sg_advance;
2909 block_offset = biter->__dma_addr & (BIT_ULL(biter->__pg_bit) - 1);
2910 biter->__sg_advance += BIT_ULL(biter->__pg_bit) - block_offset;
2911
2912 if (biter->__sg_advance >= sg_dma_len(biter->__sg)) {
2913 biter->__sg_advance = 0;
2914 biter->__sg = sg_next(biter->__sg);
2915 biter->__sg_nents--;
2916 }
2917
2918 return true;
2919}
2920EXPORT_SYMBOL(__rdma_block_iter_next);