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IB/core, cma: Nice log-friendly string helpers
[deliverable/linux.git] / drivers / infiniband / core / verbs.c
1 /*
2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
4 * Copyright (c) 2004 Intel Corporation. All rights reserved.
5 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.
7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
8 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
9 *
10 * This software is available to you under a choice of one of two
11 * licenses. You may choose to be licensed under the terms of the GNU
12 * General Public License (GPL) Version 2, available from the file
13 * COPYING in the main directory of this source tree, or the
14 * OpenIB.org BSD license below:
15 *
16 * Redistribution and use in source and binary forms, with or
17 * without modification, are permitted provided that the following
18 * conditions are met:
19 *
20 * - Redistributions of source code must retain the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer.
23 *
24 * - Redistributions in binary form must reproduce the above
25 * copyright notice, this list of conditions and the following
26 * disclaimer in the documentation and/or other materials
27 * provided with the distribution.
28 *
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 * SOFTWARE.
37 */
38
39 #include <linux/errno.h>
40 #include <linux/err.h>
41 #include <linux/export.h>
42 #include <linux/string.h>
43 #include <linux/slab.h>
44
45 #include <rdma/ib_verbs.h>
46 #include <rdma/ib_cache.h>
47 #include <rdma/ib_addr.h>
48
49 #include "core_priv.h"
50
51 static const char * const ib_events[] = {
52 [IB_EVENT_CQ_ERR] = "CQ error",
53 [IB_EVENT_QP_FATAL] = "QP fatal error",
54 [IB_EVENT_QP_REQ_ERR] = "QP request error",
55 [IB_EVENT_QP_ACCESS_ERR] = "QP access error",
56 [IB_EVENT_COMM_EST] = "communication established",
57 [IB_EVENT_SQ_DRAINED] = "send queue drained",
58 [IB_EVENT_PATH_MIG] = "path migration successful",
59 [IB_EVENT_PATH_MIG_ERR] = "path migration error",
60 [IB_EVENT_DEVICE_FATAL] = "device fatal error",
61 [IB_EVENT_PORT_ACTIVE] = "port active",
62 [IB_EVENT_PORT_ERR] = "port error",
63 [IB_EVENT_LID_CHANGE] = "LID change",
64 [IB_EVENT_PKEY_CHANGE] = "P_key change",
65 [IB_EVENT_SM_CHANGE] = "SM change",
66 [IB_EVENT_SRQ_ERR] = "SRQ error",
67 [IB_EVENT_SRQ_LIMIT_REACHED] = "SRQ limit reached",
68 [IB_EVENT_QP_LAST_WQE_REACHED] = "last WQE reached",
69 [IB_EVENT_CLIENT_REREGISTER] = "client reregister",
70 [IB_EVENT_GID_CHANGE] = "GID changed",
71 };
72
73 const char *ib_event_msg(enum ib_event_type event)
74 {
75 size_t index = event;
76
77 return (index < ARRAY_SIZE(ib_events) && ib_events[index]) ?
78 ib_events[index] : "unrecognized event";
79 }
80 EXPORT_SYMBOL(ib_event_msg);
81
82 static const char * const wc_statuses[] = {
83 [IB_WC_SUCCESS] = "success",
84 [IB_WC_LOC_LEN_ERR] = "local length error",
85 [IB_WC_LOC_QP_OP_ERR] = "local QP operation error",
86 [IB_WC_LOC_EEC_OP_ERR] = "local EE context operation error",
87 [IB_WC_LOC_PROT_ERR] = "local protection error",
88 [IB_WC_WR_FLUSH_ERR] = "WR flushed",
89 [IB_WC_MW_BIND_ERR] = "memory management operation error",
90 [IB_WC_BAD_RESP_ERR] = "bad response error",
91 [IB_WC_LOC_ACCESS_ERR] = "local access error",
92 [IB_WC_REM_INV_REQ_ERR] = "invalid request error",
93 [IB_WC_REM_ACCESS_ERR] = "remote access error",
94 [IB_WC_REM_OP_ERR] = "remote operation error",
95 [IB_WC_RETRY_EXC_ERR] = "transport retry counter exceeded",
96 [IB_WC_RNR_RETRY_EXC_ERR] = "RNR retry counter exceeded",
97 [IB_WC_LOC_RDD_VIOL_ERR] = "local RDD violation error",
98 [IB_WC_REM_INV_RD_REQ_ERR] = "remote invalid RD request",
99 [IB_WC_REM_ABORT_ERR] = "operation aborted",
100 [IB_WC_INV_EECN_ERR] = "invalid EE context number",
101 [IB_WC_INV_EEC_STATE_ERR] = "invalid EE context state",
102 [IB_WC_FATAL_ERR] = "fatal error",
103 [IB_WC_RESP_TIMEOUT_ERR] = "response timeout error",
104 [IB_WC_GENERAL_ERR] = "general error",
105 };
106
107 const char *ib_wc_status_msg(enum ib_wc_status status)
108 {
109 size_t index = status;
110
111 return (index < ARRAY_SIZE(wc_statuses) && wc_statuses[index]) ?
112 wc_statuses[index] : "unrecognized status";
113 }
114 EXPORT_SYMBOL(ib_wc_status_msg);
115
116 __attribute_const__ int ib_rate_to_mult(enum ib_rate rate)
117 {
118 switch (rate) {
119 case IB_RATE_2_5_GBPS: return 1;
120 case IB_RATE_5_GBPS: return 2;
121 case IB_RATE_10_GBPS: return 4;
122 case IB_RATE_20_GBPS: return 8;
123 case IB_RATE_30_GBPS: return 12;
124 case IB_RATE_40_GBPS: return 16;
125 case IB_RATE_60_GBPS: return 24;
126 case IB_RATE_80_GBPS: return 32;
127 case IB_RATE_120_GBPS: return 48;
128 default: return -1;
129 }
130 }
131 EXPORT_SYMBOL(ib_rate_to_mult);
132
133 __attribute_const__ enum ib_rate mult_to_ib_rate(int mult)
134 {
135 switch (mult) {
136 case 1: return IB_RATE_2_5_GBPS;
137 case 2: return IB_RATE_5_GBPS;
138 case 4: return IB_RATE_10_GBPS;
139 case 8: return IB_RATE_20_GBPS;
140 case 12: return IB_RATE_30_GBPS;
141 case 16: return IB_RATE_40_GBPS;
142 case 24: return IB_RATE_60_GBPS;
143 case 32: return IB_RATE_80_GBPS;
144 case 48: return IB_RATE_120_GBPS;
145 default: return IB_RATE_PORT_CURRENT;
146 }
147 }
148 EXPORT_SYMBOL(mult_to_ib_rate);
149
150 __attribute_const__ int ib_rate_to_mbps(enum ib_rate rate)
151 {
152 switch (rate) {
153 case IB_RATE_2_5_GBPS: return 2500;
154 case IB_RATE_5_GBPS: return 5000;
155 case IB_RATE_10_GBPS: return 10000;
156 case IB_RATE_20_GBPS: return 20000;
157 case IB_RATE_30_GBPS: return 30000;
158 case IB_RATE_40_GBPS: return 40000;
159 case IB_RATE_60_GBPS: return 60000;
160 case IB_RATE_80_GBPS: return 80000;
161 case IB_RATE_120_GBPS: return 120000;
162 case IB_RATE_14_GBPS: return 14062;
163 case IB_RATE_56_GBPS: return 56250;
164 case IB_RATE_112_GBPS: return 112500;
165 case IB_RATE_168_GBPS: return 168750;
166 case IB_RATE_25_GBPS: return 25781;
167 case IB_RATE_100_GBPS: return 103125;
168 case IB_RATE_200_GBPS: return 206250;
169 case IB_RATE_300_GBPS: return 309375;
170 default: return -1;
171 }
172 }
173 EXPORT_SYMBOL(ib_rate_to_mbps);
174
175 __attribute_const__ enum rdma_transport_type
176 rdma_node_get_transport(enum rdma_node_type node_type)
177 {
178 switch (node_type) {
179 case RDMA_NODE_IB_CA:
180 case RDMA_NODE_IB_SWITCH:
181 case RDMA_NODE_IB_ROUTER:
182 return RDMA_TRANSPORT_IB;
183 case RDMA_NODE_RNIC:
184 return RDMA_TRANSPORT_IWARP;
185 case RDMA_NODE_USNIC:
186 return RDMA_TRANSPORT_USNIC;
187 case RDMA_NODE_USNIC_UDP:
188 return RDMA_TRANSPORT_USNIC_UDP;
189 default:
190 BUG();
191 return 0;
192 }
193 }
194 EXPORT_SYMBOL(rdma_node_get_transport);
195
196 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
197 {
198 if (device->get_link_layer)
199 return device->get_link_layer(device, port_num);
200
201 switch (rdma_node_get_transport(device->node_type)) {
202 case RDMA_TRANSPORT_IB:
203 return IB_LINK_LAYER_INFINIBAND;
204 case RDMA_TRANSPORT_IWARP:
205 case RDMA_TRANSPORT_USNIC:
206 case RDMA_TRANSPORT_USNIC_UDP:
207 return IB_LINK_LAYER_ETHERNET;
208 default:
209 return IB_LINK_LAYER_UNSPECIFIED;
210 }
211 }
212 EXPORT_SYMBOL(rdma_port_get_link_layer);
213
214 /* Protection domains */
215
216 struct ib_pd *ib_alloc_pd(struct ib_device *device)
217 {
218 struct ib_pd *pd;
219
220 pd = device->alloc_pd(device, NULL, NULL);
221
222 if (!IS_ERR(pd)) {
223 pd->device = device;
224 pd->uobject = NULL;
225 atomic_set(&pd->usecnt, 0);
226 }
227
228 return pd;
229 }
230 EXPORT_SYMBOL(ib_alloc_pd);
231
232 int ib_dealloc_pd(struct ib_pd *pd)
233 {
234 if (atomic_read(&pd->usecnt))
235 return -EBUSY;
236
237 return pd->device->dealloc_pd(pd);
238 }
239 EXPORT_SYMBOL(ib_dealloc_pd);
240
241 /* Address handles */
242
243 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
244 {
245 struct ib_ah *ah;
246
247 ah = pd->device->create_ah(pd, ah_attr);
248
249 if (!IS_ERR(ah)) {
250 ah->device = pd->device;
251 ah->pd = pd;
252 ah->uobject = NULL;
253 atomic_inc(&pd->usecnt);
254 }
255
256 return ah;
257 }
258 EXPORT_SYMBOL(ib_create_ah);
259
260 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
261 struct ib_grh *grh, struct ib_ah_attr *ah_attr)
262 {
263 u32 flow_class;
264 u16 gid_index;
265 int ret;
266 int is_eth = (rdma_port_get_link_layer(device, port_num) ==
267 IB_LINK_LAYER_ETHERNET);
268
269 memset(ah_attr, 0, sizeof *ah_attr);
270 if (is_eth) {
271 if (!(wc->wc_flags & IB_WC_GRH))
272 return -EPROTOTYPE;
273
274 if (wc->wc_flags & IB_WC_WITH_SMAC &&
275 wc->wc_flags & IB_WC_WITH_VLAN) {
276 memcpy(ah_attr->dmac, wc->smac, ETH_ALEN);
277 ah_attr->vlan_id = wc->vlan_id;
278 } else {
279 ret = rdma_addr_find_dmac_by_grh(&grh->dgid, &grh->sgid,
280 ah_attr->dmac, &ah_attr->vlan_id);
281 if (ret)
282 return ret;
283 }
284 } else {
285 ah_attr->vlan_id = 0xffff;
286 }
287
288 ah_attr->dlid = wc->slid;
289 ah_attr->sl = wc->sl;
290 ah_attr->src_path_bits = wc->dlid_path_bits;
291 ah_attr->port_num = port_num;
292
293 if (wc->wc_flags & IB_WC_GRH) {
294 ah_attr->ah_flags = IB_AH_GRH;
295 ah_attr->grh.dgid = grh->sgid;
296
297 ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
298 &gid_index);
299 if (ret)
300 return ret;
301
302 ah_attr->grh.sgid_index = (u8) gid_index;
303 flow_class = be32_to_cpu(grh->version_tclass_flow);
304 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
305 ah_attr->grh.hop_limit = 0xFF;
306 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
307 }
308 return 0;
309 }
310 EXPORT_SYMBOL(ib_init_ah_from_wc);
311
312 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
313 struct ib_grh *grh, u8 port_num)
314 {
315 struct ib_ah_attr ah_attr;
316 int ret;
317
318 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
319 if (ret)
320 return ERR_PTR(ret);
321
322 return ib_create_ah(pd, &ah_attr);
323 }
324 EXPORT_SYMBOL(ib_create_ah_from_wc);
325
326 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
327 {
328 return ah->device->modify_ah ?
329 ah->device->modify_ah(ah, ah_attr) :
330 -ENOSYS;
331 }
332 EXPORT_SYMBOL(ib_modify_ah);
333
334 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
335 {
336 return ah->device->query_ah ?
337 ah->device->query_ah(ah, ah_attr) :
338 -ENOSYS;
339 }
340 EXPORT_SYMBOL(ib_query_ah);
341
342 int ib_destroy_ah(struct ib_ah *ah)
343 {
344 struct ib_pd *pd;
345 int ret;
346
347 pd = ah->pd;
348 ret = ah->device->destroy_ah(ah);
349 if (!ret)
350 atomic_dec(&pd->usecnt);
351
352 return ret;
353 }
354 EXPORT_SYMBOL(ib_destroy_ah);
355
356 /* Shared receive queues */
357
358 struct ib_srq *ib_create_srq(struct ib_pd *pd,
359 struct ib_srq_init_attr *srq_init_attr)
360 {
361 struct ib_srq *srq;
362
363 if (!pd->device->create_srq)
364 return ERR_PTR(-ENOSYS);
365
366 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
367
368 if (!IS_ERR(srq)) {
369 srq->device = pd->device;
370 srq->pd = pd;
371 srq->uobject = NULL;
372 srq->event_handler = srq_init_attr->event_handler;
373 srq->srq_context = srq_init_attr->srq_context;
374 srq->srq_type = srq_init_attr->srq_type;
375 if (srq->srq_type == IB_SRQT_XRC) {
376 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
377 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq;
378 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
379 atomic_inc(&srq->ext.xrc.cq->usecnt);
380 }
381 atomic_inc(&pd->usecnt);
382 atomic_set(&srq->usecnt, 0);
383 }
384
385 return srq;
386 }
387 EXPORT_SYMBOL(ib_create_srq);
388
389 int ib_modify_srq(struct ib_srq *srq,
390 struct ib_srq_attr *srq_attr,
391 enum ib_srq_attr_mask srq_attr_mask)
392 {
393 return srq->device->modify_srq ?
394 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
395 -ENOSYS;
396 }
397 EXPORT_SYMBOL(ib_modify_srq);
398
399 int ib_query_srq(struct ib_srq *srq,
400 struct ib_srq_attr *srq_attr)
401 {
402 return srq->device->query_srq ?
403 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
404 }
405 EXPORT_SYMBOL(ib_query_srq);
406
407 int ib_destroy_srq(struct ib_srq *srq)
408 {
409 struct ib_pd *pd;
410 enum ib_srq_type srq_type;
411 struct ib_xrcd *uninitialized_var(xrcd);
412 struct ib_cq *uninitialized_var(cq);
413 int ret;
414
415 if (atomic_read(&srq->usecnt))
416 return -EBUSY;
417
418 pd = srq->pd;
419 srq_type = srq->srq_type;
420 if (srq_type == IB_SRQT_XRC) {
421 xrcd = srq->ext.xrc.xrcd;
422 cq = srq->ext.xrc.cq;
423 }
424
425 ret = srq->device->destroy_srq(srq);
426 if (!ret) {
427 atomic_dec(&pd->usecnt);
428 if (srq_type == IB_SRQT_XRC) {
429 atomic_dec(&xrcd->usecnt);
430 atomic_dec(&cq->usecnt);
431 }
432 }
433
434 return ret;
435 }
436 EXPORT_SYMBOL(ib_destroy_srq);
437
438 /* Queue pairs */
439
440 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
441 {
442 struct ib_qp *qp = context;
443 unsigned long flags;
444
445 spin_lock_irqsave(&qp->device->event_handler_lock, flags);
446 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
447 if (event->element.qp->event_handler)
448 event->element.qp->event_handler(event, event->element.qp->qp_context);
449 spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
450 }
451
452 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
453 {
454 mutex_lock(&xrcd->tgt_qp_mutex);
455 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
456 mutex_unlock(&xrcd->tgt_qp_mutex);
457 }
458
459 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
460 void (*event_handler)(struct ib_event *, void *),
461 void *qp_context)
462 {
463 struct ib_qp *qp;
464 unsigned long flags;
465
466 qp = kzalloc(sizeof *qp, GFP_KERNEL);
467 if (!qp)
468 return ERR_PTR(-ENOMEM);
469
470 qp->real_qp = real_qp;
471 atomic_inc(&real_qp->usecnt);
472 qp->device = real_qp->device;
473 qp->event_handler = event_handler;
474 qp->qp_context = qp_context;
475 qp->qp_num = real_qp->qp_num;
476 qp->qp_type = real_qp->qp_type;
477
478 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
479 list_add(&qp->open_list, &real_qp->open_list);
480 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
481
482 return qp;
483 }
484
485 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
486 struct ib_qp_open_attr *qp_open_attr)
487 {
488 struct ib_qp *qp, *real_qp;
489
490 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
491 return ERR_PTR(-EINVAL);
492
493 qp = ERR_PTR(-EINVAL);
494 mutex_lock(&xrcd->tgt_qp_mutex);
495 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
496 if (real_qp->qp_num == qp_open_attr->qp_num) {
497 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
498 qp_open_attr->qp_context);
499 break;
500 }
501 }
502 mutex_unlock(&xrcd->tgt_qp_mutex);
503 return qp;
504 }
505 EXPORT_SYMBOL(ib_open_qp);
506
507 struct ib_qp *ib_create_qp(struct ib_pd *pd,
508 struct ib_qp_init_attr *qp_init_attr)
509 {
510 struct ib_qp *qp, *real_qp;
511 struct ib_device *device;
512
513 device = pd ? pd->device : qp_init_attr->xrcd->device;
514 qp = device->create_qp(pd, qp_init_attr, NULL);
515
516 if (!IS_ERR(qp)) {
517 qp->device = device;
518 qp->real_qp = qp;
519 qp->uobject = NULL;
520 qp->qp_type = qp_init_attr->qp_type;
521
522 atomic_set(&qp->usecnt, 0);
523 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
524 qp->event_handler = __ib_shared_qp_event_handler;
525 qp->qp_context = qp;
526 qp->pd = NULL;
527 qp->send_cq = qp->recv_cq = NULL;
528 qp->srq = NULL;
529 qp->xrcd = qp_init_attr->xrcd;
530 atomic_inc(&qp_init_attr->xrcd->usecnt);
531 INIT_LIST_HEAD(&qp->open_list);
532
533 real_qp = qp;
534 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
535 qp_init_attr->qp_context);
536 if (!IS_ERR(qp))
537 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
538 else
539 real_qp->device->destroy_qp(real_qp);
540 } else {
541 qp->event_handler = qp_init_attr->event_handler;
542 qp->qp_context = qp_init_attr->qp_context;
543 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
544 qp->recv_cq = NULL;
545 qp->srq = NULL;
546 } else {
547 qp->recv_cq = qp_init_attr->recv_cq;
548 atomic_inc(&qp_init_attr->recv_cq->usecnt);
549 qp->srq = qp_init_attr->srq;
550 if (qp->srq)
551 atomic_inc(&qp_init_attr->srq->usecnt);
552 }
553
554 qp->pd = pd;
555 qp->send_cq = qp_init_attr->send_cq;
556 qp->xrcd = NULL;
557
558 atomic_inc(&pd->usecnt);
559 atomic_inc(&qp_init_attr->send_cq->usecnt);
560 }
561 }
562
563 return qp;
564 }
565 EXPORT_SYMBOL(ib_create_qp);
566
567 static const struct {
568 int valid;
569 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
570 enum ib_qp_attr_mask req_param_add_eth[IB_QPT_MAX];
571 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
572 enum ib_qp_attr_mask opt_param_add_eth[IB_QPT_MAX];
573 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
574 [IB_QPS_RESET] = {
575 [IB_QPS_RESET] = { .valid = 1 },
576 [IB_QPS_INIT] = {
577 .valid = 1,
578 .req_param = {
579 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
580 IB_QP_PORT |
581 IB_QP_QKEY),
582 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
583 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
584 IB_QP_PORT |
585 IB_QP_ACCESS_FLAGS),
586 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
587 IB_QP_PORT |
588 IB_QP_ACCESS_FLAGS),
589 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
590 IB_QP_PORT |
591 IB_QP_ACCESS_FLAGS),
592 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
593 IB_QP_PORT |
594 IB_QP_ACCESS_FLAGS),
595 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
596 IB_QP_QKEY),
597 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
598 IB_QP_QKEY),
599 }
600 },
601 },
602 [IB_QPS_INIT] = {
603 [IB_QPS_RESET] = { .valid = 1 },
604 [IB_QPS_ERR] = { .valid = 1 },
605 [IB_QPS_INIT] = {
606 .valid = 1,
607 .opt_param = {
608 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
609 IB_QP_PORT |
610 IB_QP_QKEY),
611 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
612 IB_QP_PORT |
613 IB_QP_ACCESS_FLAGS),
614 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
615 IB_QP_PORT |
616 IB_QP_ACCESS_FLAGS),
617 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
618 IB_QP_PORT |
619 IB_QP_ACCESS_FLAGS),
620 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
621 IB_QP_PORT |
622 IB_QP_ACCESS_FLAGS),
623 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
624 IB_QP_QKEY),
625 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
626 IB_QP_QKEY),
627 }
628 },
629 [IB_QPS_RTR] = {
630 .valid = 1,
631 .req_param = {
632 [IB_QPT_UC] = (IB_QP_AV |
633 IB_QP_PATH_MTU |
634 IB_QP_DEST_QPN |
635 IB_QP_RQ_PSN),
636 [IB_QPT_RC] = (IB_QP_AV |
637 IB_QP_PATH_MTU |
638 IB_QP_DEST_QPN |
639 IB_QP_RQ_PSN |
640 IB_QP_MAX_DEST_RD_ATOMIC |
641 IB_QP_MIN_RNR_TIMER),
642 [IB_QPT_XRC_INI] = (IB_QP_AV |
643 IB_QP_PATH_MTU |
644 IB_QP_DEST_QPN |
645 IB_QP_RQ_PSN),
646 [IB_QPT_XRC_TGT] = (IB_QP_AV |
647 IB_QP_PATH_MTU |
648 IB_QP_DEST_QPN |
649 IB_QP_RQ_PSN |
650 IB_QP_MAX_DEST_RD_ATOMIC |
651 IB_QP_MIN_RNR_TIMER),
652 },
653 .req_param_add_eth = {
654 [IB_QPT_RC] = (IB_QP_SMAC),
655 [IB_QPT_UC] = (IB_QP_SMAC),
656 [IB_QPT_XRC_INI] = (IB_QP_SMAC),
657 [IB_QPT_XRC_TGT] = (IB_QP_SMAC)
658 },
659 .opt_param = {
660 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
661 IB_QP_QKEY),
662 [IB_QPT_UC] = (IB_QP_ALT_PATH |
663 IB_QP_ACCESS_FLAGS |
664 IB_QP_PKEY_INDEX),
665 [IB_QPT_RC] = (IB_QP_ALT_PATH |
666 IB_QP_ACCESS_FLAGS |
667 IB_QP_PKEY_INDEX),
668 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
669 IB_QP_ACCESS_FLAGS |
670 IB_QP_PKEY_INDEX),
671 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
672 IB_QP_ACCESS_FLAGS |
673 IB_QP_PKEY_INDEX),
674 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
675 IB_QP_QKEY),
676 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
677 IB_QP_QKEY),
678 },
679 .opt_param_add_eth = {
680 [IB_QPT_RC] = (IB_QP_ALT_SMAC |
681 IB_QP_VID |
682 IB_QP_ALT_VID),
683 [IB_QPT_UC] = (IB_QP_ALT_SMAC |
684 IB_QP_VID |
685 IB_QP_ALT_VID),
686 [IB_QPT_XRC_INI] = (IB_QP_ALT_SMAC |
687 IB_QP_VID |
688 IB_QP_ALT_VID),
689 [IB_QPT_XRC_TGT] = (IB_QP_ALT_SMAC |
690 IB_QP_VID |
691 IB_QP_ALT_VID)
692 }
693 }
694 },
695 [IB_QPS_RTR] = {
696 [IB_QPS_RESET] = { .valid = 1 },
697 [IB_QPS_ERR] = { .valid = 1 },
698 [IB_QPS_RTS] = {
699 .valid = 1,
700 .req_param = {
701 [IB_QPT_UD] = IB_QP_SQ_PSN,
702 [IB_QPT_UC] = IB_QP_SQ_PSN,
703 [IB_QPT_RC] = (IB_QP_TIMEOUT |
704 IB_QP_RETRY_CNT |
705 IB_QP_RNR_RETRY |
706 IB_QP_SQ_PSN |
707 IB_QP_MAX_QP_RD_ATOMIC),
708 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
709 IB_QP_RETRY_CNT |
710 IB_QP_RNR_RETRY |
711 IB_QP_SQ_PSN |
712 IB_QP_MAX_QP_RD_ATOMIC),
713 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
714 IB_QP_SQ_PSN),
715 [IB_QPT_SMI] = IB_QP_SQ_PSN,
716 [IB_QPT_GSI] = IB_QP_SQ_PSN,
717 },
718 .opt_param = {
719 [IB_QPT_UD] = (IB_QP_CUR_STATE |
720 IB_QP_QKEY),
721 [IB_QPT_UC] = (IB_QP_CUR_STATE |
722 IB_QP_ALT_PATH |
723 IB_QP_ACCESS_FLAGS |
724 IB_QP_PATH_MIG_STATE),
725 [IB_QPT_RC] = (IB_QP_CUR_STATE |
726 IB_QP_ALT_PATH |
727 IB_QP_ACCESS_FLAGS |
728 IB_QP_MIN_RNR_TIMER |
729 IB_QP_PATH_MIG_STATE),
730 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
731 IB_QP_ALT_PATH |
732 IB_QP_ACCESS_FLAGS |
733 IB_QP_PATH_MIG_STATE),
734 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
735 IB_QP_ALT_PATH |
736 IB_QP_ACCESS_FLAGS |
737 IB_QP_MIN_RNR_TIMER |
738 IB_QP_PATH_MIG_STATE),
739 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
740 IB_QP_QKEY),
741 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
742 IB_QP_QKEY),
743 }
744 }
745 },
746 [IB_QPS_RTS] = {
747 [IB_QPS_RESET] = { .valid = 1 },
748 [IB_QPS_ERR] = { .valid = 1 },
749 [IB_QPS_RTS] = {
750 .valid = 1,
751 .opt_param = {
752 [IB_QPT_UD] = (IB_QP_CUR_STATE |
753 IB_QP_QKEY),
754 [IB_QPT_UC] = (IB_QP_CUR_STATE |
755 IB_QP_ACCESS_FLAGS |
756 IB_QP_ALT_PATH |
757 IB_QP_PATH_MIG_STATE),
758 [IB_QPT_RC] = (IB_QP_CUR_STATE |
759 IB_QP_ACCESS_FLAGS |
760 IB_QP_ALT_PATH |
761 IB_QP_PATH_MIG_STATE |
762 IB_QP_MIN_RNR_TIMER),
763 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
764 IB_QP_ACCESS_FLAGS |
765 IB_QP_ALT_PATH |
766 IB_QP_PATH_MIG_STATE),
767 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
768 IB_QP_ACCESS_FLAGS |
769 IB_QP_ALT_PATH |
770 IB_QP_PATH_MIG_STATE |
771 IB_QP_MIN_RNR_TIMER),
772 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
773 IB_QP_QKEY),
774 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
775 IB_QP_QKEY),
776 }
777 },
778 [IB_QPS_SQD] = {
779 .valid = 1,
780 .opt_param = {
781 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
782 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
783 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
784 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
785 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
786 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
787 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
788 }
789 },
790 },
791 [IB_QPS_SQD] = {
792 [IB_QPS_RESET] = { .valid = 1 },
793 [IB_QPS_ERR] = { .valid = 1 },
794 [IB_QPS_RTS] = {
795 .valid = 1,
796 .opt_param = {
797 [IB_QPT_UD] = (IB_QP_CUR_STATE |
798 IB_QP_QKEY),
799 [IB_QPT_UC] = (IB_QP_CUR_STATE |
800 IB_QP_ALT_PATH |
801 IB_QP_ACCESS_FLAGS |
802 IB_QP_PATH_MIG_STATE),
803 [IB_QPT_RC] = (IB_QP_CUR_STATE |
804 IB_QP_ALT_PATH |
805 IB_QP_ACCESS_FLAGS |
806 IB_QP_MIN_RNR_TIMER |
807 IB_QP_PATH_MIG_STATE),
808 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
809 IB_QP_ALT_PATH |
810 IB_QP_ACCESS_FLAGS |
811 IB_QP_PATH_MIG_STATE),
812 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
813 IB_QP_ALT_PATH |
814 IB_QP_ACCESS_FLAGS |
815 IB_QP_MIN_RNR_TIMER |
816 IB_QP_PATH_MIG_STATE),
817 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
818 IB_QP_QKEY),
819 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
820 IB_QP_QKEY),
821 }
822 },
823 [IB_QPS_SQD] = {
824 .valid = 1,
825 .opt_param = {
826 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
827 IB_QP_QKEY),
828 [IB_QPT_UC] = (IB_QP_AV |
829 IB_QP_ALT_PATH |
830 IB_QP_ACCESS_FLAGS |
831 IB_QP_PKEY_INDEX |
832 IB_QP_PATH_MIG_STATE),
833 [IB_QPT_RC] = (IB_QP_PORT |
834 IB_QP_AV |
835 IB_QP_TIMEOUT |
836 IB_QP_RETRY_CNT |
837 IB_QP_RNR_RETRY |
838 IB_QP_MAX_QP_RD_ATOMIC |
839 IB_QP_MAX_DEST_RD_ATOMIC |
840 IB_QP_ALT_PATH |
841 IB_QP_ACCESS_FLAGS |
842 IB_QP_PKEY_INDEX |
843 IB_QP_MIN_RNR_TIMER |
844 IB_QP_PATH_MIG_STATE),
845 [IB_QPT_XRC_INI] = (IB_QP_PORT |
846 IB_QP_AV |
847 IB_QP_TIMEOUT |
848 IB_QP_RETRY_CNT |
849 IB_QP_RNR_RETRY |
850 IB_QP_MAX_QP_RD_ATOMIC |
851 IB_QP_ALT_PATH |
852 IB_QP_ACCESS_FLAGS |
853 IB_QP_PKEY_INDEX |
854 IB_QP_PATH_MIG_STATE),
855 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
856 IB_QP_AV |
857 IB_QP_TIMEOUT |
858 IB_QP_MAX_DEST_RD_ATOMIC |
859 IB_QP_ALT_PATH |
860 IB_QP_ACCESS_FLAGS |
861 IB_QP_PKEY_INDEX |
862 IB_QP_MIN_RNR_TIMER |
863 IB_QP_PATH_MIG_STATE),
864 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
865 IB_QP_QKEY),
866 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
867 IB_QP_QKEY),
868 }
869 }
870 },
871 [IB_QPS_SQE] = {
872 [IB_QPS_RESET] = { .valid = 1 },
873 [IB_QPS_ERR] = { .valid = 1 },
874 [IB_QPS_RTS] = {
875 .valid = 1,
876 .opt_param = {
877 [IB_QPT_UD] = (IB_QP_CUR_STATE |
878 IB_QP_QKEY),
879 [IB_QPT_UC] = (IB_QP_CUR_STATE |
880 IB_QP_ACCESS_FLAGS),
881 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
882 IB_QP_QKEY),
883 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
884 IB_QP_QKEY),
885 }
886 }
887 },
888 [IB_QPS_ERR] = {
889 [IB_QPS_RESET] = { .valid = 1 },
890 [IB_QPS_ERR] = { .valid = 1 }
891 }
892 };
893
894 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
895 enum ib_qp_type type, enum ib_qp_attr_mask mask,
896 enum rdma_link_layer ll)
897 {
898 enum ib_qp_attr_mask req_param, opt_param;
899
900 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
901 next_state < 0 || next_state > IB_QPS_ERR)
902 return 0;
903
904 if (mask & IB_QP_CUR_STATE &&
905 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
906 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
907 return 0;
908
909 if (!qp_state_table[cur_state][next_state].valid)
910 return 0;
911
912 req_param = qp_state_table[cur_state][next_state].req_param[type];
913 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
914
915 if (ll == IB_LINK_LAYER_ETHERNET) {
916 req_param |= qp_state_table[cur_state][next_state].
917 req_param_add_eth[type];
918 opt_param |= qp_state_table[cur_state][next_state].
919 opt_param_add_eth[type];
920 }
921
922 if ((mask & req_param) != req_param)
923 return 0;
924
925 if (mask & ~(req_param | opt_param | IB_QP_STATE))
926 return 0;
927
928 return 1;
929 }
930 EXPORT_SYMBOL(ib_modify_qp_is_ok);
931
932 int ib_resolve_eth_l2_attrs(struct ib_qp *qp,
933 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
934 {
935 int ret = 0;
936 union ib_gid sgid;
937
938 if ((*qp_attr_mask & IB_QP_AV) &&
939 (rdma_port_get_link_layer(qp->device, qp_attr->ah_attr.port_num) == IB_LINK_LAYER_ETHERNET)) {
940 ret = ib_query_gid(qp->device, qp_attr->ah_attr.port_num,
941 qp_attr->ah_attr.grh.sgid_index, &sgid);
942 if (ret)
943 goto out;
944 if (rdma_link_local_addr((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw)) {
945 rdma_get_ll_mac((struct in6_addr *)qp_attr->ah_attr.grh.dgid.raw, qp_attr->ah_attr.dmac);
946 rdma_get_ll_mac((struct in6_addr *)sgid.raw, qp_attr->smac);
947 if (!(*qp_attr_mask & IB_QP_VID))
948 qp_attr->vlan_id = rdma_get_vlan_id(&sgid);
949 } else {
950 ret = rdma_addr_find_dmac_by_grh(&sgid, &qp_attr->ah_attr.grh.dgid,
951 qp_attr->ah_attr.dmac, &qp_attr->vlan_id);
952 if (ret)
953 goto out;
954 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr->smac, NULL);
955 if (ret)
956 goto out;
957 }
958 *qp_attr_mask |= IB_QP_SMAC;
959 if (qp_attr->vlan_id < 0xFFFF)
960 *qp_attr_mask |= IB_QP_VID;
961 }
962 out:
963 return ret;
964 }
965 EXPORT_SYMBOL(ib_resolve_eth_l2_attrs);
966
967
968 int ib_modify_qp(struct ib_qp *qp,
969 struct ib_qp_attr *qp_attr,
970 int qp_attr_mask)
971 {
972 int ret;
973
974 ret = ib_resolve_eth_l2_attrs(qp, qp_attr, &qp_attr_mask);
975 if (ret)
976 return ret;
977
978 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
979 }
980 EXPORT_SYMBOL(ib_modify_qp);
981
982 int ib_query_qp(struct ib_qp *qp,
983 struct ib_qp_attr *qp_attr,
984 int qp_attr_mask,
985 struct ib_qp_init_attr *qp_init_attr)
986 {
987 return qp->device->query_qp ?
988 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
989 -ENOSYS;
990 }
991 EXPORT_SYMBOL(ib_query_qp);
992
993 int ib_close_qp(struct ib_qp *qp)
994 {
995 struct ib_qp *real_qp;
996 unsigned long flags;
997
998 real_qp = qp->real_qp;
999 if (real_qp == qp)
1000 return -EINVAL;
1001
1002 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
1003 list_del(&qp->open_list);
1004 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
1005
1006 atomic_dec(&real_qp->usecnt);
1007 kfree(qp);
1008
1009 return 0;
1010 }
1011 EXPORT_SYMBOL(ib_close_qp);
1012
1013 static int __ib_destroy_shared_qp(struct ib_qp *qp)
1014 {
1015 struct ib_xrcd *xrcd;
1016 struct ib_qp *real_qp;
1017 int ret;
1018
1019 real_qp = qp->real_qp;
1020 xrcd = real_qp->xrcd;
1021
1022 mutex_lock(&xrcd->tgt_qp_mutex);
1023 ib_close_qp(qp);
1024 if (atomic_read(&real_qp->usecnt) == 0)
1025 list_del(&real_qp->xrcd_list);
1026 else
1027 real_qp = NULL;
1028 mutex_unlock(&xrcd->tgt_qp_mutex);
1029
1030 if (real_qp) {
1031 ret = ib_destroy_qp(real_qp);
1032 if (!ret)
1033 atomic_dec(&xrcd->usecnt);
1034 else
1035 __ib_insert_xrcd_qp(xrcd, real_qp);
1036 }
1037
1038 return 0;
1039 }
1040
1041 int ib_destroy_qp(struct ib_qp *qp)
1042 {
1043 struct ib_pd *pd;
1044 struct ib_cq *scq, *rcq;
1045 struct ib_srq *srq;
1046 int ret;
1047
1048 if (atomic_read(&qp->usecnt))
1049 return -EBUSY;
1050
1051 if (qp->real_qp != qp)
1052 return __ib_destroy_shared_qp(qp);
1053
1054 pd = qp->pd;
1055 scq = qp->send_cq;
1056 rcq = qp->recv_cq;
1057 srq = qp->srq;
1058
1059 ret = qp->device->destroy_qp(qp);
1060 if (!ret) {
1061 if (pd)
1062 atomic_dec(&pd->usecnt);
1063 if (scq)
1064 atomic_dec(&scq->usecnt);
1065 if (rcq)
1066 atomic_dec(&rcq->usecnt);
1067 if (srq)
1068 atomic_dec(&srq->usecnt);
1069 }
1070
1071 return ret;
1072 }
1073 EXPORT_SYMBOL(ib_destroy_qp);
1074
1075 /* Completion queues */
1076
1077 struct ib_cq *ib_create_cq(struct ib_device *device,
1078 ib_comp_handler comp_handler,
1079 void (*event_handler)(struct ib_event *, void *),
1080 void *cq_context, int cqe, int comp_vector)
1081 {
1082 struct ib_cq *cq;
1083
1084 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
1085
1086 if (!IS_ERR(cq)) {
1087 cq->device = device;
1088 cq->uobject = NULL;
1089 cq->comp_handler = comp_handler;
1090 cq->event_handler = event_handler;
1091 cq->cq_context = cq_context;
1092 atomic_set(&cq->usecnt, 0);
1093 }
1094
1095 return cq;
1096 }
1097 EXPORT_SYMBOL(ib_create_cq);
1098
1099 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
1100 {
1101 return cq->device->modify_cq ?
1102 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
1103 }
1104 EXPORT_SYMBOL(ib_modify_cq);
1105
1106 int ib_destroy_cq(struct ib_cq *cq)
1107 {
1108 if (atomic_read(&cq->usecnt))
1109 return -EBUSY;
1110
1111 return cq->device->destroy_cq(cq);
1112 }
1113 EXPORT_SYMBOL(ib_destroy_cq);
1114
1115 int ib_resize_cq(struct ib_cq *cq, int cqe)
1116 {
1117 return cq->device->resize_cq ?
1118 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
1119 }
1120 EXPORT_SYMBOL(ib_resize_cq);
1121
1122 /* Memory regions */
1123
1124 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
1125 {
1126 struct ib_mr *mr;
1127 int err;
1128
1129 err = ib_check_mr_access(mr_access_flags);
1130 if (err)
1131 return ERR_PTR(err);
1132
1133 mr = pd->device->get_dma_mr(pd, mr_access_flags);
1134
1135 if (!IS_ERR(mr)) {
1136 mr->device = pd->device;
1137 mr->pd = pd;
1138 mr->uobject = NULL;
1139 atomic_inc(&pd->usecnt);
1140 atomic_set(&mr->usecnt, 0);
1141 }
1142
1143 return mr;
1144 }
1145 EXPORT_SYMBOL(ib_get_dma_mr);
1146
1147 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
1148 struct ib_phys_buf *phys_buf_array,
1149 int num_phys_buf,
1150 int mr_access_flags,
1151 u64 *iova_start)
1152 {
1153 struct ib_mr *mr;
1154 int err;
1155
1156 err = ib_check_mr_access(mr_access_flags);
1157 if (err)
1158 return ERR_PTR(err);
1159
1160 if (!pd->device->reg_phys_mr)
1161 return ERR_PTR(-ENOSYS);
1162
1163 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
1164 mr_access_flags, iova_start);
1165
1166 if (!IS_ERR(mr)) {
1167 mr->device = pd->device;
1168 mr->pd = pd;
1169 mr->uobject = NULL;
1170 atomic_inc(&pd->usecnt);
1171 atomic_set(&mr->usecnt, 0);
1172 }
1173
1174 return mr;
1175 }
1176 EXPORT_SYMBOL(ib_reg_phys_mr);
1177
1178 int ib_rereg_phys_mr(struct ib_mr *mr,
1179 int mr_rereg_mask,
1180 struct ib_pd *pd,
1181 struct ib_phys_buf *phys_buf_array,
1182 int num_phys_buf,
1183 int mr_access_flags,
1184 u64 *iova_start)
1185 {
1186 struct ib_pd *old_pd;
1187 int ret;
1188
1189 ret = ib_check_mr_access(mr_access_flags);
1190 if (ret)
1191 return ret;
1192
1193 if (!mr->device->rereg_phys_mr)
1194 return -ENOSYS;
1195
1196 if (atomic_read(&mr->usecnt))
1197 return -EBUSY;
1198
1199 old_pd = mr->pd;
1200
1201 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
1202 phys_buf_array, num_phys_buf,
1203 mr_access_flags, iova_start);
1204
1205 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
1206 atomic_dec(&old_pd->usecnt);
1207 atomic_inc(&pd->usecnt);
1208 }
1209
1210 return ret;
1211 }
1212 EXPORT_SYMBOL(ib_rereg_phys_mr);
1213
1214 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
1215 {
1216 return mr->device->query_mr ?
1217 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
1218 }
1219 EXPORT_SYMBOL(ib_query_mr);
1220
1221 int ib_dereg_mr(struct ib_mr *mr)
1222 {
1223 struct ib_pd *pd;
1224 int ret;
1225
1226 if (atomic_read(&mr->usecnt))
1227 return -EBUSY;
1228
1229 pd = mr->pd;
1230 ret = mr->device->dereg_mr(mr);
1231 if (!ret)
1232 atomic_dec(&pd->usecnt);
1233
1234 return ret;
1235 }
1236 EXPORT_SYMBOL(ib_dereg_mr);
1237
1238 struct ib_mr *ib_create_mr(struct ib_pd *pd,
1239 struct ib_mr_init_attr *mr_init_attr)
1240 {
1241 struct ib_mr *mr;
1242
1243 if (!pd->device->create_mr)
1244 return ERR_PTR(-ENOSYS);
1245
1246 mr = pd->device->create_mr(pd, mr_init_attr);
1247
1248 if (!IS_ERR(mr)) {
1249 mr->device = pd->device;
1250 mr->pd = pd;
1251 mr->uobject = NULL;
1252 atomic_inc(&pd->usecnt);
1253 atomic_set(&mr->usecnt, 0);
1254 }
1255
1256 return mr;
1257 }
1258 EXPORT_SYMBOL(ib_create_mr);
1259
1260 int ib_destroy_mr(struct ib_mr *mr)
1261 {
1262 struct ib_pd *pd;
1263 int ret;
1264
1265 if (atomic_read(&mr->usecnt))
1266 return -EBUSY;
1267
1268 pd = mr->pd;
1269 ret = mr->device->destroy_mr(mr);
1270 if (!ret)
1271 atomic_dec(&pd->usecnt);
1272
1273 return ret;
1274 }
1275 EXPORT_SYMBOL(ib_destroy_mr);
1276
1277 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
1278 {
1279 struct ib_mr *mr;
1280
1281 if (!pd->device->alloc_fast_reg_mr)
1282 return ERR_PTR(-ENOSYS);
1283
1284 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len);
1285
1286 if (!IS_ERR(mr)) {
1287 mr->device = pd->device;
1288 mr->pd = pd;
1289 mr->uobject = NULL;
1290 atomic_inc(&pd->usecnt);
1291 atomic_set(&mr->usecnt, 0);
1292 }
1293
1294 return mr;
1295 }
1296 EXPORT_SYMBOL(ib_alloc_fast_reg_mr);
1297
1298 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
1299 int max_page_list_len)
1300 {
1301 struct ib_fast_reg_page_list *page_list;
1302
1303 if (!device->alloc_fast_reg_page_list)
1304 return ERR_PTR(-ENOSYS);
1305
1306 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
1307
1308 if (!IS_ERR(page_list)) {
1309 page_list->device = device;
1310 page_list->max_page_list_len = max_page_list_len;
1311 }
1312
1313 return page_list;
1314 }
1315 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
1316
1317 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
1318 {
1319 page_list->device->free_fast_reg_page_list(page_list);
1320 }
1321 EXPORT_SYMBOL(ib_free_fast_reg_page_list);
1322
1323 /* Memory windows */
1324
1325 struct ib_mw *ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
1326 {
1327 struct ib_mw *mw;
1328
1329 if (!pd->device->alloc_mw)
1330 return ERR_PTR(-ENOSYS);
1331
1332 mw = pd->device->alloc_mw(pd, type);
1333 if (!IS_ERR(mw)) {
1334 mw->device = pd->device;
1335 mw->pd = pd;
1336 mw->uobject = NULL;
1337 mw->type = type;
1338 atomic_inc(&pd->usecnt);
1339 }
1340
1341 return mw;
1342 }
1343 EXPORT_SYMBOL(ib_alloc_mw);
1344
1345 int ib_dealloc_mw(struct ib_mw *mw)
1346 {
1347 struct ib_pd *pd;
1348 int ret;
1349
1350 pd = mw->pd;
1351 ret = mw->device->dealloc_mw(mw);
1352 if (!ret)
1353 atomic_dec(&pd->usecnt);
1354
1355 return ret;
1356 }
1357 EXPORT_SYMBOL(ib_dealloc_mw);
1358
1359 /* "Fast" memory regions */
1360
1361 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1362 int mr_access_flags,
1363 struct ib_fmr_attr *fmr_attr)
1364 {
1365 struct ib_fmr *fmr;
1366
1367 if (!pd->device->alloc_fmr)
1368 return ERR_PTR(-ENOSYS);
1369
1370 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1371 if (!IS_ERR(fmr)) {
1372 fmr->device = pd->device;
1373 fmr->pd = pd;
1374 atomic_inc(&pd->usecnt);
1375 }
1376
1377 return fmr;
1378 }
1379 EXPORT_SYMBOL(ib_alloc_fmr);
1380
1381 int ib_unmap_fmr(struct list_head *fmr_list)
1382 {
1383 struct ib_fmr *fmr;
1384
1385 if (list_empty(fmr_list))
1386 return 0;
1387
1388 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1389 return fmr->device->unmap_fmr(fmr_list);
1390 }
1391 EXPORT_SYMBOL(ib_unmap_fmr);
1392
1393 int ib_dealloc_fmr(struct ib_fmr *fmr)
1394 {
1395 struct ib_pd *pd;
1396 int ret;
1397
1398 pd = fmr->pd;
1399 ret = fmr->device->dealloc_fmr(fmr);
1400 if (!ret)
1401 atomic_dec(&pd->usecnt);
1402
1403 return ret;
1404 }
1405 EXPORT_SYMBOL(ib_dealloc_fmr);
1406
1407 /* Multicast groups */
1408
1409 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1410 {
1411 int ret;
1412
1413 if (!qp->device->attach_mcast)
1414 return -ENOSYS;
1415 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1416 return -EINVAL;
1417
1418 ret = qp->device->attach_mcast(qp, gid, lid);
1419 if (!ret)
1420 atomic_inc(&qp->usecnt);
1421 return ret;
1422 }
1423 EXPORT_SYMBOL(ib_attach_mcast);
1424
1425 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1426 {
1427 int ret;
1428
1429 if (!qp->device->detach_mcast)
1430 return -ENOSYS;
1431 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1432 return -EINVAL;
1433
1434 ret = qp->device->detach_mcast(qp, gid, lid);
1435 if (!ret)
1436 atomic_dec(&qp->usecnt);
1437 return ret;
1438 }
1439 EXPORT_SYMBOL(ib_detach_mcast);
1440
1441 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1442 {
1443 struct ib_xrcd *xrcd;
1444
1445 if (!device->alloc_xrcd)
1446 return ERR_PTR(-ENOSYS);
1447
1448 xrcd = device->alloc_xrcd(device, NULL, NULL);
1449 if (!IS_ERR(xrcd)) {
1450 xrcd->device = device;
1451 xrcd->inode = NULL;
1452 atomic_set(&xrcd->usecnt, 0);
1453 mutex_init(&xrcd->tgt_qp_mutex);
1454 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1455 }
1456
1457 return xrcd;
1458 }
1459 EXPORT_SYMBOL(ib_alloc_xrcd);
1460
1461 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1462 {
1463 struct ib_qp *qp;
1464 int ret;
1465
1466 if (atomic_read(&xrcd->usecnt))
1467 return -EBUSY;
1468
1469 while (!list_empty(&xrcd->tgt_qp_list)) {
1470 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1471 ret = ib_destroy_qp(qp);
1472 if (ret)
1473 return ret;
1474 }
1475
1476 return xrcd->device->dealloc_xrcd(xrcd);
1477 }
1478 EXPORT_SYMBOL(ib_dealloc_xrcd);
1479
1480 struct ib_flow *ib_create_flow(struct ib_qp *qp,
1481 struct ib_flow_attr *flow_attr,
1482 int domain)
1483 {
1484 struct ib_flow *flow_id;
1485 if (!qp->device->create_flow)
1486 return ERR_PTR(-ENOSYS);
1487
1488 flow_id = qp->device->create_flow(qp, flow_attr, domain);
1489 if (!IS_ERR(flow_id))
1490 atomic_inc(&qp->usecnt);
1491 return flow_id;
1492 }
1493 EXPORT_SYMBOL(ib_create_flow);
1494
1495 int ib_destroy_flow(struct ib_flow *flow_id)
1496 {
1497 int err;
1498 struct ib_qp *qp = flow_id->qp;
1499
1500 err = qp->device->destroy_flow(flow_id);
1501 if (!err)
1502 atomic_dec(&qp->usecnt);
1503 return err;
1504 }
1505 EXPORT_SYMBOL(ib_destroy_flow);
1506
1507 int ib_check_mr_status(struct ib_mr *mr, u32 check_mask,
1508 struct ib_mr_status *mr_status)
1509 {
1510 return mr->device->check_mr_status ?
1511 mr->device->check_mr_status(mr, check_mask, mr_status) : -ENOSYS;
1512 }
1513 EXPORT_SYMBOL(ib_check_mr_status);
Linux kernel - Deliverables
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