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1da177e4 LT |
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. | |
2a1d9b7f | 7 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
33b9b3ee | 8 | * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved. |
1da177e4 LT |
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 | * $Id: verbs.c 1349 2004-12-16 21:09:43Z roland $ | |
39 | */ | |
40 | ||
41 | #include <linux/errno.h> | |
42 | #include <linux/err.h> | |
8c65b4a6 | 43 | #include <linux/string.h> |
1da177e4 | 44 | |
a4d61e84 RD |
45 | #include <rdma/ib_verbs.h> |
46 | #include <rdma/ib_cache.h> | |
1da177e4 LT |
47 | |
48 | /* Protection domains */ | |
49 | ||
50 | struct ib_pd *ib_alloc_pd(struct ib_device *device) | |
51 | { | |
52 | struct ib_pd *pd; | |
53 | ||
b5e81bf5 | 54 | pd = device->alloc_pd(device, NULL, NULL); |
1da177e4 LT |
55 | |
56 | if (!IS_ERR(pd)) { | |
b5e81bf5 RD |
57 | pd->device = device; |
58 | pd->uobject = NULL; | |
1da177e4 LT |
59 | atomic_set(&pd->usecnt, 0); |
60 | } | |
61 | ||
62 | return pd; | |
63 | } | |
64 | EXPORT_SYMBOL(ib_alloc_pd); | |
65 | ||
66 | int ib_dealloc_pd(struct ib_pd *pd) | |
67 | { | |
68 | if (atomic_read(&pd->usecnt)) | |
69 | return -EBUSY; | |
70 | ||
71 | return pd->device->dealloc_pd(pd); | |
72 | } | |
73 | EXPORT_SYMBOL(ib_dealloc_pd); | |
74 | ||
75 | /* Address handles */ | |
76 | ||
77 | struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) | |
78 | { | |
79 | struct ib_ah *ah; | |
80 | ||
81 | ah = pd->device->create_ah(pd, ah_attr); | |
82 | ||
83 | if (!IS_ERR(ah)) { | |
b5e81bf5 RD |
84 | ah->device = pd->device; |
85 | ah->pd = pd; | |
86 | ah->uobject = NULL; | |
1da177e4 LT |
87 | atomic_inc(&pd->usecnt); |
88 | } | |
89 | ||
90 | return ah; | |
91 | } | |
92 | EXPORT_SYMBOL(ib_create_ah); | |
93 | ||
513789ed HR |
94 | struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc, |
95 | struct ib_grh *grh, u8 port_num) | |
96 | { | |
97 | struct ib_ah_attr ah_attr; | |
98 | u32 flow_class; | |
99 | u16 gid_index; | |
100 | int ret; | |
101 | ||
102 | memset(&ah_attr, 0, sizeof ah_attr); | |
103 | ah_attr.dlid = wc->slid; | |
104 | ah_attr.sl = wc->sl; | |
105 | ah_attr.src_path_bits = wc->dlid_path_bits; | |
106 | ah_attr.port_num = port_num; | |
107 | ||
108 | if (wc->wc_flags & IB_WC_GRH) { | |
109 | ah_attr.ah_flags = IB_AH_GRH; | |
4f8448df | 110 | ah_attr.grh.dgid = grh->sgid; |
513789ed | 111 | |
4f8448df | 112 | ret = ib_find_cached_gid(pd->device, &grh->dgid, &port_num, |
513789ed HR |
113 | &gid_index); |
114 | if (ret) | |
115 | return ERR_PTR(ret); | |
116 | ||
117 | ah_attr.grh.sgid_index = (u8) gid_index; | |
497677ab | 118 | flow_class = be32_to_cpu(grh->version_tclass_flow); |
513789ed HR |
119 | ah_attr.grh.flow_label = flow_class & 0xFFFFF; |
120 | ah_attr.grh.traffic_class = (flow_class >> 20) & 0xFF; | |
121 | ah_attr.grh.hop_limit = grh->hop_limit; | |
122 | } | |
123 | ||
124 | return ib_create_ah(pd, &ah_attr); | |
125 | } | |
126 | EXPORT_SYMBOL(ib_create_ah_from_wc); | |
127 | ||
1da177e4 LT |
128 | int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) |
129 | { | |
130 | return ah->device->modify_ah ? | |
131 | ah->device->modify_ah(ah, ah_attr) : | |
132 | -ENOSYS; | |
133 | } | |
134 | EXPORT_SYMBOL(ib_modify_ah); | |
135 | ||
136 | int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr) | |
137 | { | |
138 | return ah->device->query_ah ? | |
139 | ah->device->query_ah(ah, ah_attr) : | |
140 | -ENOSYS; | |
141 | } | |
142 | EXPORT_SYMBOL(ib_query_ah); | |
143 | ||
144 | int ib_destroy_ah(struct ib_ah *ah) | |
145 | { | |
146 | struct ib_pd *pd; | |
147 | int ret; | |
148 | ||
149 | pd = ah->pd; | |
150 | ret = ah->device->destroy_ah(ah); | |
151 | if (!ret) | |
152 | atomic_dec(&pd->usecnt); | |
153 | ||
154 | return ret; | |
155 | } | |
156 | EXPORT_SYMBOL(ib_destroy_ah); | |
157 | ||
d41fcc67 RD |
158 | /* Shared receive queues */ |
159 | ||
160 | struct ib_srq *ib_create_srq(struct ib_pd *pd, | |
161 | struct ib_srq_init_attr *srq_init_attr) | |
162 | { | |
163 | struct ib_srq *srq; | |
164 | ||
165 | if (!pd->device->create_srq) | |
166 | return ERR_PTR(-ENOSYS); | |
167 | ||
168 | srq = pd->device->create_srq(pd, srq_init_attr, NULL); | |
169 | ||
170 | if (!IS_ERR(srq)) { | |
171 | srq->device = pd->device; | |
172 | srq->pd = pd; | |
173 | srq->uobject = NULL; | |
174 | srq->event_handler = srq_init_attr->event_handler; | |
175 | srq->srq_context = srq_init_attr->srq_context; | |
176 | atomic_inc(&pd->usecnt); | |
177 | atomic_set(&srq->usecnt, 0); | |
178 | } | |
179 | ||
180 | return srq; | |
181 | } | |
182 | EXPORT_SYMBOL(ib_create_srq); | |
183 | ||
184 | int ib_modify_srq(struct ib_srq *srq, | |
185 | struct ib_srq_attr *srq_attr, | |
186 | enum ib_srq_attr_mask srq_attr_mask) | |
187 | { | |
188 | return srq->device->modify_srq(srq, srq_attr, srq_attr_mask); | |
189 | } | |
190 | EXPORT_SYMBOL(ib_modify_srq); | |
191 | ||
192 | int ib_query_srq(struct ib_srq *srq, | |
193 | struct ib_srq_attr *srq_attr) | |
194 | { | |
195 | return srq->device->query_srq ? | |
196 | srq->device->query_srq(srq, srq_attr) : -ENOSYS; | |
197 | } | |
198 | EXPORT_SYMBOL(ib_query_srq); | |
199 | ||
200 | int ib_destroy_srq(struct ib_srq *srq) | |
201 | { | |
202 | struct ib_pd *pd; | |
203 | int ret; | |
204 | ||
205 | if (atomic_read(&srq->usecnt)) | |
206 | return -EBUSY; | |
207 | ||
208 | pd = srq->pd; | |
209 | ||
210 | ret = srq->device->destroy_srq(srq); | |
211 | if (!ret) | |
212 | atomic_dec(&pd->usecnt); | |
213 | ||
214 | return ret; | |
215 | } | |
216 | EXPORT_SYMBOL(ib_destroy_srq); | |
217 | ||
1da177e4 LT |
218 | /* Queue pairs */ |
219 | ||
220 | struct ib_qp *ib_create_qp(struct ib_pd *pd, | |
221 | struct ib_qp_init_attr *qp_init_attr) | |
222 | { | |
223 | struct ib_qp *qp; | |
224 | ||
b5e81bf5 | 225 | qp = pd->device->create_qp(pd, qp_init_attr, NULL); |
1da177e4 LT |
226 | |
227 | if (!IS_ERR(qp)) { | |
228 | qp->device = pd->device; | |
229 | qp->pd = pd; | |
230 | qp->send_cq = qp_init_attr->send_cq; | |
231 | qp->recv_cq = qp_init_attr->recv_cq; | |
232 | qp->srq = qp_init_attr->srq; | |
b5e81bf5 | 233 | qp->uobject = NULL; |
1da177e4 LT |
234 | qp->event_handler = qp_init_attr->event_handler; |
235 | qp->qp_context = qp_init_attr->qp_context; | |
236 | qp->qp_type = qp_init_attr->qp_type; | |
237 | atomic_inc(&pd->usecnt); | |
238 | atomic_inc(&qp_init_attr->send_cq->usecnt); | |
239 | atomic_inc(&qp_init_attr->recv_cq->usecnt); | |
240 | if (qp_init_attr->srq) | |
241 | atomic_inc(&qp_init_attr->srq->usecnt); | |
242 | } | |
243 | ||
244 | return qp; | |
245 | } | |
246 | EXPORT_SYMBOL(ib_create_qp); | |
247 | ||
248 | int ib_modify_qp(struct ib_qp *qp, | |
249 | struct ib_qp_attr *qp_attr, | |
250 | int qp_attr_mask) | |
251 | { | |
252 | return qp->device->modify_qp(qp, qp_attr, qp_attr_mask); | |
253 | } | |
254 | EXPORT_SYMBOL(ib_modify_qp); | |
255 | ||
256 | int ib_query_qp(struct ib_qp *qp, | |
257 | struct ib_qp_attr *qp_attr, | |
258 | int qp_attr_mask, | |
259 | struct ib_qp_init_attr *qp_init_attr) | |
260 | { | |
261 | return qp->device->query_qp ? | |
262 | qp->device->query_qp(qp, qp_attr, qp_attr_mask, qp_init_attr) : | |
263 | -ENOSYS; | |
264 | } | |
265 | EXPORT_SYMBOL(ib_query_qp); | |
266 | ||
267 | int ib_destroy_qp(struct ib_qp *qp) | |
268 | { | |
269 | struct ib_pd *pd; | |
270 | struct ib_cq *scq, *rcq; | |
271 | struct ib_srq *srq; | |
272 | int ret; | |
273 | ||
274 | pd = qp->pd; | |
275 | scq = qp->send_cq; | |
276 | rcq = qp->recv_cq; | |
277 | srq = qp->srq; | |
278 | ||
279 | ret = qp->device->destroy_qp(qp); | |
280 | if (!ret) { | |
281 | atomic_dec(&pd->usecnt); | |
282 | atomic_dec(&scq->usecnt); | |
283 | atomic_dec(&rcq->usecnt); | |
284 | if (srq) | |
285 | atomic_dec(&srq->usecnt); | |
286 | } | |
287 | ||
288 | return ret; | |
289 | } | |
290 | EXPORT_SYMBOL(ib_destroy_qp); | |
291 | ||
292 | /* Completion queues */ | |
293 | ||
294 | struct ib_cq *ib_create_cq(struct ib_device *device, | |
295 | ib_comp_handler comp_handler, | |
296 | void (*event_handler)(struct ib_event *, void *), | |
297 | void *cq_context, int cqe) | |
298 | { | |
299 | struct ib_cq *cq; | |
300 | ||
b5e81bf5 | 301 | cq = device->create_cq(device, cqe, NULL, NULL); |
1da177e4 LT |
302 | |
303 | if (!IS_ERR(cq)) { | |
304 | cq->device = device; | |
b5e81bf5 | 305 | cq->uobject = NULL; |
1da177e4 LT |
306 | cq->comp_handler = comp_handler; |
307 | cq->event_handler = event_handler; | |
308 | cq->cq_context = cq_context; | |
309 | atomic_set(&cq->usecnt, 0); | |
310 | } | |
311 | ||
312 | return cq; | |
313 | } | |
314 | EXPORT_SYMBOL(ib_create_cq); | |
315 | ||
316 | int ib_destroy_cq(struct ib_cq *cq) | |
317 | { | |
318 | if (atomic_read(&cq->usecnt)) | |
319 | return -EBUSY; | |
320 | ||
321 | return cq->device->destroy_cq(cq); | |
322 | } | |
323 | EXPORT_SYMBOL(ib_destroy_cq); | |
324 | ||
325 | int ib_resize_cq(struct ib_cq *cq, | |
326 | int cqe) | |
327 | { | |
40de2e54 | 328 | return cq->device->resize_cq ? |
33b9b3ee | 329 | cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS; |
1da177e4 LT |
330 | } |
331 | EXPORT_SYMBOL(ib_resize_cq); | |
332 | ||
333 | /* Memory regions */ | |
334 | ||
335 | struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags) | |
336 | { | |
337 | struct ib_mr *mr; | |
338 | ||
339 | mr = pd->device->get_dma_mr(pd, mr_access_flags); | |
340 | ||
341 | if (!IS_ERR(mr)) { | |
b5e81bf5 RD |
342 | mr->device = pd->device; |
343 | mr->pd = pd; | |
344 | mr->uobject = NULL; | |
1da177e4 LT |
345 | atomic_inc(&pd->usecnt); |
346 | atomic_set(&mr->usecnt, 0); | |
347 | } | |
348 | ||
349 | return mr; | |
350 | } | |
351 | EXPORT_SYMBOL(ib_get_dma_mr); | |
352 | ||
353 | struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd, | |
354 | struct ib_phys_buf *phys_buf_array, | |
355 | int num_phys_buf, | |
356 | int mr_access_flags, | |
357 | u64 *iova_start) | |
358 | { | |
359 | struct ib_mr *mr; | |
360 | ||
361 | mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf, | |
362 | mr_access_flags, iova_start); | |
363 | ||
364 | if (!IS_ERR(mr)) { | |
b5e81bf5 RD |
365 | mr->device = pd->device; |
366 | mr->pd = pd; | |
367 | mr->uobject = NULL; | |
1da177e4 LT |
368 | atomic_inc(&pd->usecnt); |
369 | atomic_set(&mr->usecnt, 0); | |
370 | } | |
371 | ||
372 | return mr; | |
373 | } | |
374 | EXPORT_SYMBOL(ib_reg_phys_mr); | |
375 | ||
376 | int ib_rereg_phys_mr(struct ib_mr *mr, | |
377 | int mr_rereg_mask, | |
378 | struct ib_pd *pd, | |
379 | struct ib_phys_buf *phys_buf_array, | |
380 | int num_phys_buf, | |
381 | int mr_access_flags, | |
382 | u64 *iova_start) | |
383 | { | |
384 | struct ib_pd *old_pd; | |
385 | int ret; | |
386 | ||
387 | if (!mr->device->rereg_phys_mr) | |
388 | return -ENOSYS; | |
389 | ||
390 | if (atomic_read(&mr->usecnt)) | |
391 | return -EBUSY; | |
392 | ||
393 | old_pd = mr->pd; | |
394 | ||
395 | ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd, | |
396 | phys_buf_array, num_phys_buf, | |
397 | mr_access_flags, iova_start); | |
398 | ||
399 | if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) { | |
400 | atomic_dec(&old_pd->usecnt); | |
401 | atomic_inc(&pd->usecnt); | |
402 | } | |
403 | ||
404 | return ret; | |
405 | } | |
406 | EXPORT_SYMBOL(ib_rereg_phys_mr); | |
407 | ||
408 | int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr) | |
409 | { | |
410 | return mr->device->query_mr ? | |
411 | mr->device->query_mr(mr, mr_attr) : -ENOSYS; | |
412 | } | |
413 | EXPORT_SYMBOL(ib_query_mr); | |
414 | ||
415 | int ib_dereg_mr(struct ib_mr *mr) | |
416 | { | |
417 | struct ib_pd *pd; | |
418 | int ret; | |
419 | ||
420 | if (atomic_read(&mr->usecnt)) | |
421 | return -EBUSY; | |
422 | ||
423 | pd = mr->pd; | |
424 | ret = mr->device->dereg_mr(mr); | |
425 | if (!ret) | |
426 | atomic_dec(&pd->usecnt); | |
427 | ||
428 | return ret; | |
429 | } | |
430 | EXPORT_SYMBOL(ib_dereg_mr); | |
431 | ||
432 | /* Memory windows */ | |
433 | ||
434 | struct ib_mw *ib_alloc_mw(struct ib_pd *pd) | |
435 | { | |
436 | struct ib_mw *mw; | |
437 | ||
438 | if (!pd->device->alloc_mw) | |
439 | return ERR_PTR(-ENOSYS); | |
440 | ||
441 | mw = pd->device->alloc_mw(pd); | |
442 | if (!IS_ERR(mw)) { | |
b5e81bf5 RD |
443 | mw->device = pd->device; |
444 | mw->pd = pd; | |
445 | mw->uobject = NULL; | |
1da177e4 LT |
446 | atomic_inc(&pd->usecnt); |
447 | } | |
448 | ||
449 | return mw; | |
450 | } | |
451 | EXPORT_SYMBOL(ib_alloc_mw); | |
452 | ||
453 | int ib_dealloc_mw(struct ib_mw *mw) | |
454 | { | |
455 | struct ib_pd *pd; | |
456 | int ret; | |
457 | ||
458 | pd = mw->pd; | |
459 | ret = mw->device->dealloc_mw(mw); | |
460 | if (!ret) | |
461 | atomic_dec(&pd->usecnt); | |
462 | ||
463 | return ret; | |
464 | } | |
465 | EXPORT_SYMBOL(ib_dealloc_mw); | |
466 | ||
467 | /* "Fast" memory regions */ | |
468 | ||
469 | struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd, | |
470 | int mr_access_flags, | |
471 | struct ib_fmr_attr *fmr_attr) | |
472 | { | |
473 | struct ib_fmr *fmr; | |
474 | ||
475 | if (!pd->device->alloc_fmr) | |
476 | return ERR_PTR(-ENOSYS); | |
477 | ||
478 | fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr); | |
479 | if (!IS_ERR(fmr)) { | |
480 | fmr->device = pd->device; | |
481 | fmr->pd = pd; | |
482 | atomic_inc(&pd->usecnt); | |
483 | } | |
484 | ||
485 | return fmr; | |
486 | } | |
487 | EXPORT_SYMBOL(ib_alloc_fmr); | |
488 | ||
489 | int ib_unmap_fmr(struct list_head *fmr_list) | |
490 | { | |
491 | struct ib_fmr *fmr; | |
492 | ||
493 | if (list_empty(fmr_list)) | |
494 | return 0; | |
495 | ||
496 | fmr = list_entry(fmr_list->next, struct ib_fmr, list); | |
497 | return fmr->device->unmap_fmr(fmr_list); | |
498 | } | |
499 | EXPORT_SYMBOL(ib_unmap_fmr); | |
500 | ||
501 | int ib_dealloc_fmr(struct ib_fmr *fmr) | |
502 | { | |
503 | struct ib_pd *pd; | |
504 | int ret; | |
505 | ||
506 | pd = fmr->pd; | |
507 | ret = fmr->device->dealloc_fmr(fmr); | |
508 | if (!ret) | |
509 | atomic_dec(&pd->usecnt); | |
510 | ||
511 | return ret; | |
512 | } | |
513 | EXPORT_SYMBOL(ib_dealloc_fmr); | |
514 | ||
515 | /* Multicast groups */ | |
516 | ||
517 | int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) | |
518 | { | |
0c33aeed JM |
519 | if (!qp->device->attach_mcast) |
520 | return -ENOSYS; | |
521 | if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) | |
522 | return -EINVAL; | |
523 | ||
524 | return qp->device->attach_mcast(qp, gid, lid); | |
1da177e4 LT |
525 | } |
526 | EXPORT_SYMBOL(ib_attach_mcast); | |
527 | ||
528 | int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) | |
529 | { | |
0c33aeed JM |
530 | if (!qp->device->detach_mcast) |
531 | return -ENOSYS; | |
532 | if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD) | |
533 | return -EINVAL; | |
534 | ||
535 | return qp->device->detach_mcast(qp, gid, lid); | |
1da177e4 LT |
536 | } |
537 | EXPORT_SYMBOL(ib_detach_mcast); |