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
ib_rate_to_mult(enum ib_rate rate)46 int 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 }
61 EXPORT_SYMBOL(ib_rate_to_mult);
62
mult_to_ib_rate(int mult)63 enum 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 }
78 EXPORT_SYMBOL(mult_to_ib_rate);
79
80 enum rdma_transport_type
rdma_node_get_transport(enum rdma_node_type node_type)81 rdma_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 }
95 EXPORT_SYMBOL(rdma_node_get_transport);
96
rdma_port_get_link_layer(struct ib_device * device,u8 port_num)97 enum 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 }
111 EXPORT_SYMBOL(rdma_port_get_link_layer);
112
113 /* Protection domains */
114
ib_alloc_pd(struct ib_device * device)115 struct 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 }
129 EXPORT_SYMBOL(ib_alloc_pd);
130
ib_dealloc_pd(struct ib_pd * pd)131 int 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 }
138 EXPORT_SYMBOL(ib_dealloc_pd);
139
140 /* Address handles */
141
ib_create_ah(struct ib_pd * pd,struct ib_ah_attr * ah_attr)142 struct 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 }
157 EXPORT_SYMBOL(ib_create_ah);
158
ib_init_ah_from_wc(struct ib_device * device,u8 port_num,struct ib_wc * wc,struct ib_grh * grh,struct ib_ah_attr * ah_attr)159 int 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 }
189 EXPORT_SYMBOL(ib_init_ah_from_wc);
190
ib_create_ah_from_wc(struct ib_pd * pd,struct ib_wc * wc,struct ib_grh * grh,u8 port_num)191 struct 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 }
203 EXPORT_SYMBOL(ib_create_ah_from_wc);
204
ib_modify_ah(struct ib_ah * ah,struct ib_ah_attr * ah_attr)205 int 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 }
211 EXPORT_SYMBOL(ib_modify_ah);
212
ib_query_ah(struct ib_ah * ah,struct ib_ah_attr * ah_attr)213 int 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 }
219 EXPORT_SYMBOL(ib_query_ah);
220
ib_destroy_ah(struct ib_ah * ah)221 int 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 }
233 EXPORT_SYMBOL(ib_destroy_ah);
234
235 /* Shared receive queues */
236
ib_create_srq(struct ib_pd * pd,struct ib_srq_init_attr * srq_init_attr)237 struct 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 srq->ext.xrc.cq = NULL;
254 srq->ext.xrc.xrcd = NULL;
255 atomic_inc(&pd->usecnt);
256 atomic_set(&srq->usecnt, 0);
257 }
258
259 return srq;
260 }
261 EXPORT_SYMBOL(ib_create_srq);
262
ib_create_xrc_srq(struct ib_pd * pd,struct ib_cq * xrc_cq,struct ib_xrcd * xrcd,struct ib_srq_init_attr * srq_init_attr)263 struct ib_srq *ib_create_xrc_srq(struct ib_pd *pd,
264 struct ib_cq *xrc_cq,
265 struct ib_xrcd *xrcd,
266 struct ib_srq_init_attr *srq_init_attr)
267 {
268 struct ib_srq *srq;
269
270 if (!pd->device->create_xrc_srq)
271 return ERR_PTR(-ENOSYS);
272
273 srq = pd->device->create_xrc_srq(pd, xrc_cq, xrcd, srq_init_attr, NULL);
274
275 if (!IS_ERR(srq)) {
276 srq->device = pd->device;
277 srq->pd = pd;
278 srq->uobject = NULL;
279 srq->event_handler = srq_init_attr->event_handler;
280 srq->srq_context = srq_init_attr->srq_context;
281 srq->ext.xrc.cq = xrc_cq;
282 srq->ext.xrc.xrcd = xrcd;
283 atomic_inc(&pd->usecnt);
284 atomic_inc(&xrcd->usecnt);
285 atomic_inc(&xrc_cq->usecnt);
286 atomic_set(&srq->usecnt, 0);
287 }
288
289 return srq;
290 }
291 EXPORT_SYMBOL(ib_create_xrc_srq);
292
ib_modify_srq(struct ib_srq * srq,struct ib_srq_attr * srq_attr,enum ib_srq_attr_mask srq_attr_mask)293 int ib_modify_srq(struct ib_srq *srq,
294 struct ib_srq_attr *srq_attr,
295 enum ib_srq_attr_mask srq_attr_mask)
296 {
297 return srq->device->modify_srq ?
298 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
299 -ENOSYS;
300 }
301 EXPORT_SYMBOL(ib_modify_srq);
302
ib_query_srq(struct ib_srq * srq,struct ib_srq_attr * srq_attr)303 int ib_query_srq(struct ib_srq *srq,
304 struct ib_srq_attr *srq_attr)
305 {
306 return srq->device->query_srq ?
307 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
308 }
309 EXPORT_SYMBOL(ib_query_srq);
310
ib_destroy_srq(struct ib_srq * srq)311 int ib_destroy_srq(struct ib_srq *srq)
312 {
313 struct ib_pd *pd;
314 struct ib_cq *xrc_cq;
315 struct ib_xrcd *xrcd;
316 int ret;
317
318 if (atomic_read(&srq->usecnt))
319 return -EBUSY;
320
321 pd = srq->pd;
322 xrc_cq = srq->ext.xrc.cq;
323 xrcd = srq->ext.xrc.xrcd;
324
325 ret = srq->device->destroy_srq(srq);
326 if (!ret) {
327 atomic_dec(&pd->usecnt);
328 if (xrc_cq)
329 atomic_dec(&xrc_cq->usecnt);
330 if (xrcd)
331 atomic_dec(&xrcd->usecnt);
332 }
333
334 return ret;
335 }
336 EXPORT_SYMBOL(ib_destroy_srq);
337
338 /* Queue pairs */
339
ib_create_qp(struct ib_pd * pd,struct ib_qp_init_attr * qp_init_attr)340 struct ib_qp *ib_create_qp(struct ib_pd *pd,
341 struct ib_qp_init_attr *qp_init_attr)
342 {
343 struct ib_qp *qp;
344
345 qp = pd->device->create_qp(pd, qp_init_attr, NULL);
346
347 if (!IS_ERR(qp)) {
348 qp->device = pd->device;
349 qp->pd = pd;
350 qp->send_cq = qp_init_attr->send_cq;
351 qp->recv_cq = qp_init_attr->recv_cq;
352 qp->srq = qp_init_attr->srq;
353 qp->uobject = NULL;
354 qp->event_handler = qp_init_attr->event_handler;
355 qp->qp_context = qp_init_attr->qp_context;
356 qp->qp_type = qp_init_attr->qp_type;
357 qp->xrcd = qp->qp_type == IB_QPT_XRC ?
358 qp_init_attr->xrcd : NULL;
359 atomic_inc(&pd->usecnt);
360 atomic_inc(&qp_init_attr->send_cq->usecnt);
361 atomic_inc(&qp_init_attr->recv_cq->usecnt);
362 if (qp_init_attr->srq)
363 atomic_inc(&qp_init_attr->srq->usecnt);
364 if (qp->qp_type == IB_QPT_XRC)
365 atomic_inc(&qp->xrcd->usecnt);
366 }
367
368 return qp;
369 }
370 EXPORT_SYMBOL(ib_create_qp);
371
372 static const struct {
373 int valid;
374 enum ib_qp_attr_mask req_param[IB_QPT_RAW_PACKET + 1];
375 enum ib_qp_attr_mask opt_param[IB_QPT_RAW_PACKET + 1];
376 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
377 [IB_QPS_RESET] = {
378 [IB_QPS_RESET] = { .valid = 1 },
379 [IB_QPS_INIT] = {
380 .valid = 1,
381 .req_param = {
382 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
383 IB_QP_PORT |
384 IB_QP_QKEY),
385 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
386 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
387 IB_QP_PORT |
388 IB_QP_ACCESS_FLAGS),
389 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
390 IB_QP_PORT |
391 IB_QP_ACCESS_FLAGS),
392 [IB_QPT_XRC] = (IB_QP_PKEY_INDEX |
393 IB_QP_PORT |
394 IB_QP_ACCESS_FLAGS),
395 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
396 IB_QP_QKEY),
397 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
398 IB_QP_QKEY),
399 }
400 },
401 },
402 [IB_QPS_INIT] = {
403 [IB_QPS_RESET] = { .valid = 1 },
404 [IB_QPS_ERR] = { .valid = 1 },
405 [IB_QPS_INIT] = {
406 .valid = 1,
407 .opt_param = {
408 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
409 IB_QP_PORT |
410 IB_QP_QKEY),
411 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
412 IB_QP_PORT |
413 IB_QP_ACCESS_FLAGS),
414 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
415 IB_QP_PORT |
416 IB_QP_ACCESS_FLAGS),
417 [IB_QPT_XRC] = (IB_QP_PKEY_INDEX |
418 IB_QP_PORT |
419 IB_QP_ACCESS_FLAGS),
420 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
421 IB_QP_QKEY),
422 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
423 IB_QP_QKEY),
424 }
425 },
426 [IB_QPS_RTR] = {
427 .valid = 1,
428 .req_param = {
429 [IB_QPT_UC] = (IB_QP_AV |
430 IB_QP_PATH_MTU |
431 IB_QP_DEST_QPN |
432 IB_QP_RQ_PSN),
433 [IB_QPT_RC] = (IB_QP_AV |
434 IB_QP_PATH_MTU |
435 IB_QP_DEST_QPN |
436 IB_QP_RQ_PSN |
437 IB_QP_MAX_DEST_RD_ATOMIC |
438 IB_QP_MIN_RNR_TIMER),
439 [IB_QPT_XRC] = (IB_QP_AV |
440 IB_QP_PATH_MTU |
441 IB_QP_DEST_QPN |
442 IB_QP_RQ_PSN |
443 IB_QP_MAX_DEST_RD_ATOMIC |
444 IB_QP_MIN_RNR_TIMER),
445 },
446 .opt_param = {
447 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
448 IB_QP_QKEY),
449 [IB_QPT_UC] = (IB_QP_ALT_PATH |
450 IB_QP_ACCESS_FLAGS |
451 IB_QP_PKEY_INDEX),
452 [IB_QPT_RC] = (IB_QP_ALT_PATH |
453 IB_QP_ACCESS_FLAGS |
454 IB_QP_PKEY_INDEX),
455 [IB_QPT_XRC] = (IB_QP_ALT_PATH |
456 IB_QP_ACCESS_FLAGS |
457 IB_QP_PKEY_INDEX),
458 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
459 IB_QP_QKEY),
460 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
461 IB_QP_QKEY),
462 }
463 }
464 },
465 [IB_QPS_RTR] = {
466 [IB_QPS_RESET] = { .valid = 1 },
467 [IB_QPS_ERR] = { .valid = 1 },
468 [IB_QPS_RTS] = {
469 .valid = 1,
470 .req_param = {
471 [IB_QPT_UD] = IB_QP_SQ_PSN,
472 [IB_QPT_UC] = IB_QP_SQ_PSN,
473 [IB_QPT_RC] = (IB_QP_TIMEOUT |
474 IB_QP_RETRY_CNT |
475 IB_QP_RNR_RETRY |
476 IB_QP_SQ_PSN |
477 IB_QP_MAX_QP_RD_ATOMIC),
478 [IB_QPT_XRC] = (IB_QP_TIMEOUT |
479 IB_QP_RETRY_CNT |
480 IB_QP_RNR_RETRY |
481 IB_QP_SQ_PSN |
482 IB_QP_MAX_QP_RD_ATOMIC),
483 [IB_QPT_SMI] = IB_QP_SQ_PSN,
484 [IB_QPT_GSI] = IB_QP_SQ_PSN,
485 },
486 .opt_param = {
487 [IB_QPT_UD] = (IB_QP_CUR_STATE |
488 IB_QP_QKEY),
489 [IB_QPT_UC] = (IB_QP_CUR_STATE |
490 IB_QP_ALT_PATH |
491 IB_QP_ACCESS_FLAGS |
492 IB_QP_PATH_MIG_STATE),
493 [IB_QPT_RC] = (IB_QP_CUR_STATE |
494 IB_QP_ALT_PATH |
495 IB_QP_ACCESS_FLAGS |
496 IB_QP_MIN_RNR_TIMER |
497 IB_QP_PATH_MIG_STATE),
498 [IB_QPT_XRC] = (IB_QP_CUR_STATE |
499 IB_QP_ALT_PATH |
500 IB_QP_ACCESS_FLAGS |
501 IB_QP_MIN_RNR_TIMER |
502 IB_QP_PATH_MIG_STATE),
503 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
504 IB_QP_QKEY),
505 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
506 IB_QP_QKEY),
507 }
508 }
509 },
510 [IB_QPS_RTS] = {
511 [IB_QPS_RESET] = { .valid = 1 },
512 [IB_QPS_ERR] = { .valid = 1 },
513 [IB_QPS_RTS] = {
514 .valid = 1,
515 .opt_param = {
516 [IB_QPT_UD] = (IB_QP_CUR_STATE |
517 IB_QP_QKEY),
518 [IB_QPT_UC] = (IB_QP_CUR_STATE |
519 IB_QP_ACCESS_FLAGS |
520 IB_QP_ALT_PATH |
521 IB_QP_PATH_MIG_STATE),
522 [IB_QPT_RC] = (IB_QP_CUR_STATE |
523 IB_QP_ACCESS_FLAGS |
524 IB_QP_ALT_PATH |
525 IB_QP_PATH_MIG_STATE |
526 IB_QP_MIN_RNR_TIMER),
527 [IB_QPT_XRC] = (IB_QP_CUR_STATE |
528 IB_QP_ACCESS_FLAGS |
529 IB_QP_ALT_PATH |
530 IB_QP_PATH_MIG_STATE |
531 IB_QP_MIN_RNR_TIMER),
532 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
533 IB_QP_QKEY),
534 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
535 IB_QP_QKEY),
536 }
537 },
538 [IB_QPS_SQD] = {
539 .valid = 1,
540 .opt_param = {
541 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
542 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
543 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
544 [IB_QPT_XRC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
545 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
546 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
547 }
548 },
549 },
550 [IB_QPS_SQD] = {
551 [IB_QPS_RESET] = { .valid = 1 },
552 [IB_QPS_ERR] = { .valid = 1 },
553 [IB_QPS_RTS] = {
554 .valid = 1,
555 .opt_param = {
556 [IB_QPT_UD] = (IB_QP_CUR_STATE |
557 IB_QP_QKEY),
558 [IB_QPT_UC] = (IB_QP_CUR_STATE |
559 IB_QP_ALT_PATH |
560 IB_QP_ACCESS_FLAGS |
561 IB_QP_PATH_MIG_STATE),
562 [IB_QPT_RC] = (IB_QP_CUR_STATE |
563 IB_QP_ALT_PATH |
564 IB_QP_ACCESS_FLAGS |
565 IB_QP_MIN_RNR_TIMER |
566 IB_QP_PATH_MIG_STATE),
567 [IB_QPT_XRC] = (IB_QP_CUR_STATE |
568 IB_QP_ALT_PATH |
569 IB_QP_ACCESS_FLAGS |
570 IB_QP_MIN_RNR_TIMER |
571 IB_QP_PATH_MIG_STATE),
572 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
573 IB_QP_QKEY),
574 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
575 IB_QP_QKEY),
576 }
577 },
578 [IB_QPS_SQD] = {
579 .valid = 1,
580 .opt_param = {
581 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
582 IB_QP_QKEY),
583 [IB_QPT_UC] = (IB_QP_AV |
584 IB_QP_ALT_PATH |
585 IB_QP_ACCESS_FLAGS |
586 IB_QP_PKEY_INDEX |
587 IB_QP_PATH_MIG_STATE),
588 [IB_QPT_RC] = (IB_QP_PORT |
589 IB_QP_AV |
590 IB_QP_TIMEOUT |
591 IB_QP_RETRY_CNT |
592 IB_QP_RNR_RETRY |
593 IB_QP_MAX_QP_RD_ATOMIC |
594 IB_QP_MAX_DEST_RD_ATOMIC |
595 IB_QP_ALT_PATH |
596 IB_QP_ACCESS_FLAGS |
597 IB_QP_PKEY_INDEX |
598 IB_QP_MIN_RNR_TIMER |
599 IB_QP_PATH_MIG_STATE),
600 [IB_QPT_XRC] = (IB_QP_PORT |
601 IB_QP_AV |
602 IB_QP_TIMEOUT |
603 IB_QP_RETRY_CNT |
604 IB_QP_RNR_RETRY |
605 IB_QP_MAX_QP_RD_ATOMIC |
606 IB_QP_MAX_DEST_RD_ATOMIC |
607 IB_QP_ALT_PATH |
608 IB_QP_ACCESS_FLAGS |
609 IB_QP_PKEY_INDEX |
610 IB_QP_MIN_RNR_TIMER |
611 IB_QP_PATH_MIG_STATE),
612 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
613 IB_QP_QKEY),
614 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
615 IB_QP_QKEY),
616 }
617 }
618 },
619 [IB_QPS_SQE] = {
620 [IB_QPS_RESET] = { .valid = 1 },
621 [IB_QPS_ERR] = { .valid = 1 },
622 [IB_QPS_RTS] = {
623 .valid = 1,
624 .opt_param = {
625 [IB_QPT_UD] = (IB_QP_CUR_STATE |
626 IB_QP_QKEY),
627 [IB_QPT_UC] = (IB_QP_CUR_STATE |
628 IB_QP_ACCESS_FLAGS),
629 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
630 IB_QP_QKEY),
631 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
632 IB_QP_QKEY),
633 }
634 }
635 },
636 [IB_QPS_ERR] = {
637 [IB_QPS_RESET] = { .valid = 1 },
638 [IB_QPS_ERR] = { .valid = 1 }
639 }
640 };
641
ib_modify_qp_is_ok(enum ib_qp_state cur_state,enum ib_qp_state next_state,enum ib_qp_type type,enum ib_qp_attr_mask mask)642 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
643 enum ib_qp_type type, enum ib_qp_attr_mask mask)
644 {
645 enum ib_qp_attr_mask req_param, opt_param;
646
647 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
648 next_state < 0 || next_state > IB_QPS_ERR)
649 return 0;
650
651 if (mask & IB_QP_CUR_STATE &&
652 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
653 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
654 return 0;
655
656 if (!qp_state_table[cur_state][next_state].valid)
657 return 0;
658
659 req_param = qp_state_table[cur_state][next_state].req_param[type];
660 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
661
662 if ((mask & req_param) != req_param)
663 return 0;
664
665 if (mask & ~(req_param | opt_param | IB_QP_STATE))
666 return 0;
667
668 return 1;
669 }
670 EXPORT_SYMBOL(ib_modify_qp_is_ok);
671
ib_modify_qp(struct ib_qp * qp,struct ib_qp_attr * qp_attr,int qp_attr_mask)672 int ib_modify_qp(struct ib_qp *qp,
673 struct ib_qp_attr *qp_attr,
674 int qp_attr_mask)
675 {
676 return qp->device->modify_qp(qp, qp_attr, qp_attr_mask, NULL);
677 }
678 EXPORT_SYMBOL(ib_modify_qp);
679
ib_query_qp(struct ib_qp * qp,struct ib_qp_attr * qp_attr,int qp_attr_mask,struct ib_qp_init_attr * qp_init_attr)680 int ib_query_qp(struct ib_qp *qp,
681 struct ib_qp_attr *qp_attr,
682 int qp_attr_mask,
683 struct ib_qp_init_attr *qp_init_attr)
684 {
685 return qp->device->query_qp ?
686 qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) :
687 -ENOSYS;
688 }
689 EXPORT_SYMBOL(ib_query_qp);
690
ib_destroy_qp(struct ib_qp * qp)691 int ib_destroy_qp(struct ib_qp *qp)
692 {
693 struct ib_pd *pd;
694 struct ib_cq *scq, *rcq;
695 struct ib_srq *srq;
696 struct ib_xrcd *xrcd;
697 enum ib_qp_type qp_type = qp->qp_type;
698 int ret;
699
700 pd = qp->pd;
701 scq = qp->send_cq;
702 rcq = qp->recv_cq;
703 srq = qp->srq;
704 xrcd = qp->xrcd;
705
706 ret = qp->device->destroy_qp(qp);
707 if (!ret) {
708 atomic_dec(&pd->usecnt);
709 atomic_dec(&scq->usecnt);
710 atomic_dec(&rcq->usecnt);
711 if (srq)
712 atomic_dec(&srq->usecnt);
713 if (qp_type == IB_QPT_XRC)
714 atomic_dec(&xrcd->usecnt);
715 }
716
717 return ret;
718 }
719 EXPORT_SYMBOL(ib_destroy_qp);
720
721 /* Completion queues */
722
ib_create_cq(struct ib_device * device,ib_comp_handler comp_handler,void (* event_handler)(struct ib_event *,void *),void * cq_context,int cqe,int comp_vector)723 struct ib_cq *ib_create_cq(struct ib_device *device,
724 ib_comp_handler comp_handler,
725 void (*event_handler)(struct ib_event *, void *),
726 void *cq_context, int cqe, int comp_vector)
727 {
728 struct ib_cq *cq;
729
730 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
731
732 if (!IS_ERR(cq)) {
733 cq->device = device;
734 cq->uobject = NULL;
735 cq->comp_handler = comp_handler;
736 cq->event_handler = event_handler;
737 cq->cq_context = cq_context;
738 atomic_set(&cq->usecnt, 0);
739 }
740
741 return cq;
742 }
743 EXPORT_SYMBOL(ib_create_cq);
744
ib_modify_cq(struct ib_cq * cq,u16 cq_count,u16 cq_period)745 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
746 {
747 return cq->device->modify_cq ?
748 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
749 }
750 EXPORT_SYMBOL(ib_modify_cq);
751
ib_destroy_cq(struct ib_cq * cq)752 int ib_destroy_cq(struct ib_cq *cq)
753 {
754 if (atomic_read(&cq->usecnt))
755 return -EBUSY;
756
757 return cq->device->destroy_cq(cq);
758 }
759 EXPORT_SYMBOL(ib_destroy_cq);
760
ib_resize_cq(struct ib_cq * cq,int cqe)761 int ib_resize_cq(struct ib_cq *cq, int cqe)
762 {
763 return cq->device->resize_cq ?
764 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
765 }
766 EXPORT_SYMBOL(ib_resize_cq);
767
768 /* Memory regions */
769
ib_get_dma_mr(struct ib_pd * pd,int mr_access_flags)770 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
771 {
772 struct ib_mr *mr;
773
774 mr = pd->device->get_dma_mr(pd, mr_access_flags);
775
776 if (!IS_ERR(mr)) {
777 mr->device = pd->device;
778 mr->pd = pd;
779 mr->uobject = NULL;
780 atomic_inc(&pd->usecnt);
781 atomic_set(&mr->usecnt, 0);
782 }
783
784 return mr;
785 }
786 EXPORT_SYMBOL(ib_get_dma_mr);
787
ib_reg_phys_mr(struct ib_pd * pd,struct ib_phys_buf * phys_buf_array,int num_phys_buf,int mr_access_flags,u64 * iova_start)788 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
789 struct ib_phys_buf *phys_buf_array,
790 int num_phys_buf,
791 int mr_access_flags,
792 u64 *iova_start)
793 {
794 struct ib_mr *mr;
795
796 if (!pd->device->reg_phys_mr)
797 return ERR_PTR(-ENOSYS);
798
799 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
800 mr_access_flags, iova_start);
801
802 if (!IS_ERR(mr)) {
803 mr->device = pd->device;
804 mr->pd = pd;
805 mr->uobject = NULL;
806 atomic_inc(&pd->usecnt);
807 atomic_set(&mr->usecnt, 0);
808 }
809
810 return mr;
811 }
812 EXPORT_SYMBOL(ib_reg_phys_mr);
813
ib_rereg_phys_mr(struct ib_mr * mr,int mr_rereg_mask,struct ib_pd * pd,struct ib_phys_buf * phys_buf_array,int num_phys_buf,int mr_access_flags,u64 * iova_start)814 int ib_rereg_phys_mr(struct ib_mr *mr,
815 int mr_rereg_mask,
816 struct ib_pd *pd,
817 struct ib_phys_buf *phys_buf_array,
818 int num_phys_buf,
819 int mr_access_flags,
820 u64 *iova_start)
821 {
822 struct ib_pd *old_pd;
823 int ret;
824
825 if (!mr->device->rereg_phys_mr)
826 return -ENOSYS;
827
828 if (atomic_read(&mr->usecnt))
829 return -EBUSY;
830
831 old_pd = mr->pd;
832
833 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
834 phys_buf_array, num_phys_buf,
835 mr_access_flags, iova_start);
836
837 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
838 atomic_dec(&old_pd->usecnt);
839 atomic_inc(&pd->usecnt);
840 }
841
842 return ret;
843 }
844 EXPORT_SYMBOL(ib_rereg_phys_mr);
845
ib_query_mr(struct ib_mr * mr,struct ib_mr_attr * mr_attr)846 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
847 {
848 return mr->device->query_mr ?
849 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
850 }
851 EXPORT_SYMBOL(ib_query_mr);
852
ib_dereg_mr(struct ib_mr * mr)853 int ib_dereg_mr(struct ib_mr *mr)
854 {
855 struct ib_pd *pd;
856 int ret;
857
858 if (atomic_read(&mr->usecnt))
859 return -EBUSY;
860
861 pd = mr->pd;
862 ret = mr->device->dereg_mr(mr);
863 if (!ret)
864 atomic_dec(&pd->usecnt);
865
866 return ret;
867 }
868 EXPORT_SYMBOL(ib_dereg_mr);
869
ib_alloc_fast_reg_mr(struct ib_pd * pd,int max_page_list_len)870 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
871 {
872 struct ib_mr *mr;
873
874 if (!pd->device->alloc_fast_reg_mr)
875 return ERR_PTR(-ENOSYS);
876
877 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len);
878
879 if (!IS_ERR(mr)) {
880 mr->device = pd->device;
881 mr->pd = pd;
882 mr->uobject = NULL;
883 atomic_inc(&pd->usecnt);
884 atomic_set(&mr->usecnt, 0);
885 }
886
887 return mr;
888 }
889 EXPORT_SYMBOL(ib_alloc_fast_reg_mr);
890
ib_alloc_fast_reg_page_list(struct ib_device * device,int max_page_list_len)891 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
892 int max_page_list_len)
893 {
894 struct ib_fast_reg_page_list *page_list;
895
896 if (!device->alloc_fast_reg_page_list)
897 return ERR_PTR(-ENOSYS);
898
899 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
900
901 if (!IS_ERR(page_list)) {
902 page_list->device = device;
903 page_list->max_page_list_len = max_page_list_len;
904 }
905
906 return page_list;
907 }
908 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
909
ib_free_fast_reg_page_list(struct ib_fast_reg_page_list * page_list)910 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
911 {
912 page_list->device->free_fast_reg_page_list(page_list);
913 }
914 EXPORT_SYMBOL(ib_free_fast_reg_page_list);
915
916 /* Memory windows */
917
ib_alloc_mw(struct ib_pd * pd)918 struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
919 {
920 struct ib_mw *mw;
921
922 if (!pd->device->alloc_mw)
923 return ERR_PTR(-ENOSYS);
924
925 mw = pd->device->alloc_mw(pd);
926 if (!IS_ERR(mw)) {
927 mw->device = pd->device;
928 mw->pd = pd;
929 mw->uobject = NULL;
930 atomic_inc(&pd->usecnt);
931 }
932
933 return mw;
934 }
935 EXPORT_SYMBOL(ib_alloc_mw);
936
ib_dealloc_mw(struct ib_mw * mw)937 int ib_dealloc_mw(struct ib_mw *mw)
938 {
939 struct ib_pd *pd;
940 int ret;
941
942 pd = mw->pd;
943 ret = mw->device->dealloc_mw(mw);
944 if (!ret)
945 atomic_dec(&pd->usecnt);
946
947 return ret;
948 }
949 EXPORT_SYMBOL(ib_dealloc_mw);
950
951 /* "Fast" memory regions */
952
ib_alloc_fmr(struct ib_pd * pd,int mr_access_flags,struct ib_fmr_attr * fmr_attr)953 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
954 int mr_access_flags,
955 struct ib_fmr_attr *fmr_attr)
956 {
957 struct ib_fmr *fmr;
958
959 if (!pd->device->alloc_fmr)
960 return ERR_PTR(-ENOSYS);
961
962 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
963 if (!IS_ERR(fmr)) {
964 fmr->device = pd->device;
965 fmr->pd = pd;
966 atomic_inc(&pd->usecnt);
967 }
968
969 return fmr;
970 }
971 EXPORT_SYMBOL(ib_alloc_fmr);
972
ib_unmap_fmr(struct list_head * fmr_list)973 int ib_unmap_fmr(struct list_head *fmr_list)
974 {
975 struct ib_fmr *fmr;
976
977 if (list_empty(fmr_list))
978 return 0;
979
980 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
981 return fmr->device->unmap_fmr(fmr_list);
982 }
983 EXPORT_SYMBOL(ib_unmap_fmr);
984
ib_dealloc_fmr(struct ib_fmr * fmr)985 int ib_dealloc_fmr(struct ib_fmr *fmr)
986 {
987 struct ib_pd *pd;
988 int ret;
989
990 pd = fmr->pd;
991 ret = fmr->device->dealloc_fmr(fmr);
992 if (!ret)
993 atomic_dec(&pd->usecnt);
994
995 return ret;
996 }
997 EXPORT_SYMBOL(ib_dealloc_fmr);
998
999 /* Multicast groups */
1000
ib_attach_mcast(struct ib_qp * qp,union ib_gid * gid,u16 lid)1001 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1002 {
1003 if (!qp->device->attach_mcast)
1004 return -ENOSYS;
1005
1006 switch (rdma_node_get_transport(qp->device->node_type)) {
1007 case RDMA_TRANSPORT_IB:
1008 if (qp->qp_type == IB_QPT_RAW_PACKET) {
1009 /* In raw Etherent mgids the 63 msb's should be 0 */
1010 if (gid->global.subnet_prefix & cpu_to_be64(~1ULL))
1011 return -EINVAL;
1012 } else if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1013 return -EINVAL;
1014 break;
1015 case RDMA_TRANSPORT_IWARP:
1016 if (qp->qp_type != IB_QPT_RAW_PACKET)
1017 return -EINVAL;
1018 break;
1019 }
1020 return qp->device->attach_mcast(qp, gid, lid);
1021 }
1022 EXPORT_SYMBOL(ib_attach_mcast);
1023
ib_detach_mcast(struct ib_qp * qp,union ib_gid * gid,u16 lid)1024 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1025 {
1026 if (!qp->device->detach_mcast)
1027 return -ENOSYS;
1028
1029 switch (rdma_node_get_transport(qp->device->node_type)) {
1030 case RDMA_TRANSPORT_IB:
1031 if (qp->qp_type == IB_QPT_RAW_PACKET) {
1032 /* In raw Etherent mgids the 63 msb's should be 0 */
1033 if (gid->global.subnet_prefix & cpu_to_be64(~1ULL))
1034 return -EINVAL;
1035 } else if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1036 return -EINVAL;
1037 break;
1038 case RDMA_TRANSPORT_IWARP:
1039 if (qp->qp_type != IB_QPT_RAW_PACKET)
1040 return -EINVAL;
1041 break;
1042 }
1043 return qp->device->detach_mcast(qp, gid, lid);
1044 }
1045 EXPORT_SYMBOL(ib_detach_mcast);
1046
ib_dealloc_xrcd(struct ib_xrcd * xrcd)1047 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1048 {
1049 if (atomic_read(&xrcd->usecnt))
1050 return -EBUSY;
1051
1052 return xrcd->device->dealloc_xrcd(xrcd);
1053 }
1054 EXPORT_SYMBOL(ib_dealloc_xrcd);
1055
ib_alloc_xrcd(struct ib_device * device)1056 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1057 {
1058 struct ib_xrcd *xrcd;
1059
1060 if (!device->alloc_xrcd)
1061 return ERR_PTR(-ENOSYS);
1062
1063 xrcd = device->alloc_xrcd(device, NULL, NULL);
1064 if (!IS_ERR(xrcd)) {
1065 xrcd->device = device;
1066 xrcd->inode = NULL;
1067 xrcd->uobject = NULL;
1068 atomic_set(&xrcd->usecnt, 0);
1069 }
1070 return xrcd;
1071 }
1072 EXPORT_SYMBOL(ib_alloc_xrcd);
1073
1074