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Merge branch 'upstream-fixes'
[deliverable/linux.git] / drivers / infiniband / core / uverbs_cmd.c
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
34 * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
35 */
36
37 #include <linux/file.h>
38 #include <linux/fs.h>
39
40 #include <asm/uaccess.h>
41
42 #include "uverbs.h"
43
44 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
45 do { \
46 (udata)->inbuf = (void __user *) (ibuf); \
47 (udata)->outbuf = (void __user *) (obuf); \
48 (udata)->inlen = (ilen); \
49 (udata)->outlen = (olen); \
50 } while (0)
51
52 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
53 const char __user *buf,
54 int in_len, int out_len)
55 {
56 struct ib_uverbs_get_context cmd;
57 struct ib_uverbs_get_context_resp resp;
58 struct ib_udata udata;
59 struct ib_device *ibdev = file->device->ib_dev;
60 struct ib_ucontext *ucontext;
61 struct file *filp;
62 int ret;
63
64 if (out_len < sizeof resp)
65 return -ENOSPC;
66
67 if (copy_from_user(&cmd, buf, sizeof cmd))
68 return -EFAULT;
69
70 down(&file->mutex);
71
72 if (file->ucontext) {
73 ret = -EINVAL;
74 goto err;
75 }
76
77 INIT_UDATA(&udata, buf + sizeof cmd,
78 (unsigned long) cmd.response + sizeof resp,
79 in_len - sizeof cmd, out_len - sizeof resp);
80
81 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
82 if (IS_ERR(ucontext))
83 return PTR_ERR(file->ucontext);
84
85 ucontext->device = ibdev;
86 INIT_LIST_HEAD(&ucontext->pd_list);
87 INIT_LIST_HEAD(&ucontext->mr_list);
88 INIT_LIST_HEAD(&ucontext->mw_list);
89 INIT_LIST_HEAD(&ucontext->cq_list);
90 INIT_LIST_HEAD(&ucontext->qp_list);
91 INIT_LIST_HEAD(&ucontext->srq_list);
92 INIT_LIST_HEAD(&ucontext->ah_list);
93
94 resp.num_comp_vectors = file->device->num_comp_vectors;
95
96 filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
97 if (IS_ERR(filp)) {
98 ret = PTR_ERR(filp);
99 goto err_free;
100 }
101
102 if (copy_to_user((void __user *) (unsigned long) cmd.response,
103 &resp, sizeof resp)) {
104 ret = -EFAULT;
105 goto err_file;
106 }
107
108 file->async_file = filp->private_data;
109
110 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
111 ib_uverbs_event_handler);
112 ret = ib_register_event_handler(&file->event_handler);
113 if (ret)
114 goto err_file;
115
116 kref_get(&file->async_file->ref);
117 kref_get(&file->ref);
118 file->ucontext = ucontext;
119
120 fd_install(resp.async_fd, filp);
121
122 up(&file->mutex);
123
124 return in_len;
125
126 err_file:
127 put_unused_fd(resp.async_fd);
128 fput(filp);
129
130 err_free:
131 ibdev->dealloc_ucontext(ucontext);
132
133 err:
134 up(&file->mutex);
135 return ret;
136 }
137
138 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
139 const char __user *buf,
140 int in_len, int out_len)
141 {
142 struct ib_uverbs_query_device cmd;
143 struct ib_uverbs_query_device_resp resp;
144 struct ib_device_attr attr;
145 int ret;
146
147 if (out_len < sizeof resp)
148 return -ENOSPC;
149
150 if (copy_from_user(&cmd, buf, sizeof cmd))
151 return -EFAULT;
152
153 ret = ib_query_device(file->device->ib_dev, &attr);
154 if (ret)
155 return ret;
156
157 memset(&resp, 0, sizeof resp);
158
159 resp.fw_ver = attr.fw_ver;
160 resp.node_guid = attr.node_guid;
161 resp.sys_image_guid = attr.sys_image_guid;
162 resp.max_mr_size = attr.max_mr_size;
163 resp.page_size_cap = attr.page_size_cap;
164 resp.vendor_id = attr.vendor_id;
165 resp.vendor_part_id = attr.vendor_part_id;
166 resp.hw_ver = attr.hw_ver;
167 resp.max_qp = attr.max_qp;
168 resp.max_qp_wr = attr.max_qp_wr;
169 resp.device_cap_flags = attr.device_cap_flags;
170 resp.max_sge = attr.max_sge;
171 resp.max_sge_rd = attr.max_sge_rd;
172 resp.max_cq = attr.max_cq;
173 resp.max_cqe = attr.max_cqe;
174 resp.max_mr = attr.max_mr;
175 resp.max_pd = attr.max_pd;
176 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
177 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
178 resp.max_res_rd_atom = attr.max_res_rd_atom;
179 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
180 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
181 resp.atomic_cap = attr.atomic_cap;
182 resp.max_ee = attr.max_ee;
183 resp.max_rdd = attr.max_rdd;
184 resp.max_mw = attr.max_mw;
185 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
186 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
187 resp.max_mcast_grp = attr.max_mcast_grp;
188 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
189 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
190 resp.max_ah = attr.max_ah;
191 resp.max_fmr = attr.max_fmr;
192 resp.max_map_per_fmr = attr.max_map_per_fmr;
193 resp.max_srq = attr.max_srq;
194 resp.max_srq_wr = attr.max_srq_wr;
195 resp.max_srq_sge = attr.max_srq_sge;
196 resp.max_pkeys = attr.max_pkeys;
197 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
198 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
199
200 if (copy_to_user((void __user *) (unsigned long) cmd.response,
201 &resp, sizeof resp))
202 return -EFAULT;
203
204 return in_len;
205 }
206
207 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
208 const char __user *buf,
209 int in_len, int out_len)
210 {
211 struct ib_uverbs_query_port cmd;
212 struct ib_uverbs_query_port_resp resp;
213 struct ib_port_attr attr;
214 int ret;
215
216 if (out_len < sizeof resp)
217 return -ENOSPC;
218
219 if (copy_from_user(&cmd, buf, sizeof cmd))
220 return -EFAULT;
221
222 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
223 if (ret)
224 return ret;
225
226 memset(&resp, 0, sizeof resp);
227
228 resp.state = attr.state;
229 resp.max_mtu = attr.max_mtu;
230 resp.active_mtu = attr.active_mtu;
231 resp.gid_tbl_len = attr.gid_tbl_len;
232 resp.port_cap_flags = attr.port_cap_flags;
233 resp.max_msg_sz = attr.max_msg_sz;
234 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
235 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
236 resp.pkey_tbl_len = attr.pkey_tbl_len;
237 resp.lid = attr.lid;
238 resp.sm_lid = attr.sm_lid;
239 resp.lmc = attr.lmc;
240 resp.max_vl_num = attr.max_vl_num;
241 resp.sm_sl = attr.sm_sl;
242 resp.subnet_timeout = attr.subnet_timeout;
243 resp.init_type_reply = attr.init_type_reply;
244 resp.active_width = attr.active_width;
245 resp.active_speed = attr.active_speed;
246 resp.phys_state = attr.phys_state;
247
248 if (copy_to_user((void __user *) (unsigned long) cmd.response,
249 &resp, sizeof resp))
250 return -EFAULT;
251
252 return in_len;
253 }
254
255 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
256 const char __user *buf,
257 int in_len, int out_len)
258 {
259 struct ib_uverbs_alloc_pd cmd;
260 struct ib_uverbs_alloc_pd_resp resp;
261 struct ib_udata udata;
262 struct ib_uobject *uobj;
263 struct ib_pd *pd;
264 int ret;
265
266 if (out_len < sizeof resp)
267 return -ENOSPC;
268
269 if (copy_from_user(&cmd, buf, sizeof cmd))
270 return -EFAULT;
271
272 INIT_UDATA(&udata, buf + sizeof cmd,
273 (unsigned long) cmd.response + sizeof resp,
274 in_len - sizeof cmd, out_len - sizeof resp);
275
276 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
277 if (!uobj)
278 return -ENOMEM;
279
280 uobj->context = file->ucontext;
281
282 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
283 file->ucontext, &udata);
284 if (IS_ERR(pd)) {
285 ret = PTR_ERR(pd);
286 goto err;
287 }
288
289 pd->device = file->device->ib_dev;
290 pd->uobject = uobj;
291 atomic_set(&pd->usecnt, 0);
292
293 down(&ib_uverbs_idr_mutex);
294
295 retry:
296 if (!idr_pre_get(&ib_uverbs_pd_idr, GFP_KERNEL)) {
297 ret = -ENOMEM;
298 goto err_up;
299 }
300
301 ret = idr_get_new(&ib_uverbs_pd_idr, pd, &uobj->id);
302
303 if (ret == -EAGAIN)
304 goto retry;
305 if (ret)
306 goto err_up;
307
308 memset(&resp, 0, sizeof resp);
309 resp.pd_handle = uobj->id;
310
311 if (copy_to_user((void __user *) (unsigned long) cmd.response,
312 &resp, sizeof resp)) {
313 ret = -EFAULT;
314 goto err_idr;
315 }
316
317 down(&file->mutex);
318 list_add_tail(&uobj->list, &file->ucontext->pd_list);
319 up(&file->mutex);
320
321 up(&ib_uverbs_idr_mutex);
322
323 return in_len;
324
325 err_idr:
326 idr_remove(&ib_uverbs_pd_idr, uobj->id);
327
328 err_up:
329 up(&ib_uverbs_idr_mutex);
330 ib_dealloc_pd(pd);
331
332 err:
333 kfree(uobj);
334 return ret;
335 }
336
337 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
338 const char __user *buf,
339 int in_len, int out_len)
340 {
341 struct ib_uverbs_dealloc_pd cmd;
342 struct ib_pd *pd;
343 struct ib_uobject *uobj;
344 int ret = -EINVAL;
345
346 if (copy_from_user(&cmd, buf, sizeof cmd))
347 return -EFAULT;
348
349 down(&ib_uverbs_idr_mutex);
350
351 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
352 if (!pd || pd->uobject->context != file->ucontext)
353 goto out;
354
355 uobj = pd->uobject;
356
357 ret = ib_dealloc_pd(pd);
358 if (ret)
359 goto out;
360
361 idr_remove(&ib_uverbs_pd_idr, cmd.pd_handle);
362
363 down(&file->mutex);
364 list_del(&uobj->list);
365 up(&file->mutex);
366
367 kfree(uobj);
368
369 out:
370 up(&ib_uverbs_idr_mutex);
371
372 return ret ? ret : in_len;
373 }
374
375 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
376 const char __user *buf, int in_len,
377 int out_len)
378 {
379 struct ib_uverbs_reg_mr cmd;
380 struct ib_uverbs_reg_mr_resp resp;
381 struct ib_udata udata;
382 struct ib_umem_object *obj;
383 struct ib_pd *pd;
384 struct ib_mr *mr;
385 int ret;
386
387 if (out_len < sizeof resp)
388 return -ENOSPC;
389
390 if (copy_from_user(&cmd, buf, sizeof cmd))
391 return -EFAULT;
392
393 INIT_UDATA(&udata, buf + sizeof cmd,
394 (unsigned long) cmd.response + sizeof resp,
395 in_len - sizeof cmd, out_len - sizeof resp);
396
397 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
398 return -EINVAL;
399
400 /*
401 * Local write permission is required if remote write or
402 * remote atomic permission is also requested.
403 */
404 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
405 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
406 return -EINVAL;
407
408 obj = kmalloc(sizeof *obj, GFP_KERNEL);
409 if (!obj)
410 return -ENOMEM;
411
412 obj->uobject.context = file->ucontext;
413
414 /*
415 * We ask for writable memory if any access flags other than
416 * "remote read" are set. "Local write" and "remote write"
417 * obviously require write access. "Remote atomic" can do
418 * things like fetch and add, which will modify memory, and
419 * "MW bind" can change permissions by binding a window.
420 */
421 ret = ib_umem_get(file->device->ib_dev, &obj->umem,
422 (void *) (unsigned long) cmd.start, cmd.length,
423 !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ));
424 if (ret)
425 goto err_free;
426
427 obj->umem.virt_base = cmd.hca_va;
428
429 down(&ib_uverbs_idr_mutex);
430
431 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
432 if (!pd || pd->uobject->context != file->ucontext) {
433 ret = -EINVAL;
434 goto err_up;
435 }
436
437 if (!pd->device->reg_user_mr) {
438 ret = -ENOSYS;
439 goto err_up;
440 }
441
442 mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata);
443 if (IS_ERR(mr)) {
444 ret = PTR_ERR(mr);
445 goto err_up;
446 }
447
448 mr->device = pd->device;
449 mr->pd = pd;
450 mr->uobject = &obj->uobject;
451 atomic_inc(&pd->usecnt);
452 atomic_set(&mr->usecnt, 0);
453
454 memset(&resp, 0, sizeof resp);
455 resp.lkey = mr->lkey;
456 resp.rkey = mr->rkey;
457
458 retry:
459 if (!idr_pre_get(&ib_uverbs_mr_idr, GFP_KERNEL)) {
460 ret = -ENOMEM;
461 goto err_unreg;
462 }
463
464 ret = idr_get_new(&ib_uverbs_mr_idr, mr, &obj->uobject.id);
465
466 if (ret == -EAGAIN)
467 goto retry;
468 if (ret)
469 goto err_unreg;
470
471 resp.mr_handle = obj->uobject.id;
472
473 if (copy_to_user((void __user *) (unsigned long) cmd.response,
474 &resp, sizeof resp)) {
475 ret = -EFAULT;
476 goto err_idr;
477 }
478
479 down(&file->mutex);
480 list_add_tail(&obj->uobject.list, &file->ucontext->mr_list);
481 up(&file->mutex);
482
483 up(&ib_uverbs_idr_mutex);
484
485 return in_len;
486
487 err_idr:
488 idr_remove(&ib_uverbs_mr_idr, obj->uobject.id);
489
490 err_unreg:
491 ib_dereg_mr(mr);
492
493 err_up:
494 up(&ib_uverbs_idr_mutex);
495
496 ib_umem_release(file->device->ib_dev, &obj->umem);
497
498 err_free:
499 kfree(obj);
500 return ret;
501 }
502
503 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
504 const char __user *buf, int in_len,
505 int out_len)
506 {
507 struct ib_uverbs_dereg_mr cmd;
508 struct ib_mr *mr;
509 struct ib_umem_object *memobj;
510 int ret = -EINVAL;
511
512 if (copy_from_user(&cmd, buf, sizeof cmd))
513 return -EFAULT;
514
515 down(&ib_uverbs_idr_mutex);
516
517 mr = idr_find(&ib_uverbs_mr_idr, cmd.mr_handle);
518 if (!mr || mr->uobject->context != file->ucontext)
519 goto out;
520
521 memobj = container_of(mr->uobject, struct ib_umem_object, uobject);
522
523 ret = ib_dereg_mr(mr);
524 if (ret)
525 goto out;
526
527 idr_remove(&ib_uverbs_mr_idr, cmd.mr_handle);
528
529 down(&file->mutex);
530 list_del(&memobj->uobject.list);
531 up(&file->mutex);
532
533 ib_umem_release(file->device->ib_dev, &memobj->umem);
534 kfree(memobj);
535
536 out:
537 up(&ib_uverbs_idr_mutex);
538
539 return ret ? ret : in_len;
540 }
541
542 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
543 const char __user *buf, int in_len,
544 int out_len)
545 {
546 struct ib_uverbs_create_comp_channel cmd;
547 struct ib_uverbs_create_comp_channel_resp resp;
548 struct file *filp;
549
550 if (out_len < sizeof resp)
551 return -ENOSPC;
552
553 if (copy_from_user(&cmd, buf, sizeof cmd))
554 return -EFAULT;
555
556 filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
557 if (IS_ERR(filp))
558 return PTR_ERR(filp);
559
560 if (copy_to_user((void __user *) (unsigned long) cmd.response,
561 &resp, sizeof resp)) {
562 put_unused_fd(resp.fd);
563 fput(filp);
564 return -EFAULT;
565 }
566
567 fd_install(resp.fd, filp);
568 return in_len;
569 }
570
571 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
572 const char __user *buf, int in_len,
573 int out_len)
574 {
575 struct ib_uverbs_create_cq cmd;
576 struct ib_uverbs_create_cq_resp resp;
577 struct ib_udata udata;
578 struct ib_ucq_object *uobj;
579 struct ib_uverbs_event_file *ev_file = NULL;
580 struct ib_cq *cq;
581 int ret;
582
583 if (out_len < sizeof resp)
584 return -ENOSPC;
585
586 if (copy_from_user(&cmd, buf, sizeof cmd))
587 return -EFAULT;
588
589 INIT_UDATA(&udata, buf + sizeof cmd,
590 (unsigned long) cmd.response + sizeof resp,
591 in_len - sizeof cmd, out_len - sizeof resp);
592
593 if (cmd.comp_vector >= file->device->num_comp_vectors)
594 return -EINVAL;
595
596 if (cmd.comp_channel >= 0)
597 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
598
599 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
600 if (!uobj)
601 return -ENOMEM;
602
603 uobj->uobject.user_handle = cmd.user_handle;
604 uobj->uobject.context = file->ucontext;
605 uobj->uverbs_file = file;
606 uobj->comp_events_reported = 0;
607 uobj->async_events_reported = 0;
608 INIT_LIST_HEAD(&uobj->comp_list);
609 INIT_LIST_HEAD(&uobj->async_list);
610
611 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
612 file->ucontext, &udata);
613 if (IS_ERR(cq)) {
614 ret = PTR_ERR(cq);
615 goto err;
616 }
617
618 cq->device = file->device->ib_dev;
619 cq->uobject = &uobj->uobject;
620 cq->comp_handler = ib_uverbs_comp_handler;
621 cq->event_handler = ib_uverbs_cq_event_handler;
622 cq->cq_context = ev_file;
623 atomic_set(&cq->usecnt, 0);
624
625 down(&ib_uverbs_idr_mutex);
626
627 retry:
628 if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) {
629 ret = -ENOMEM;
630 goto err_up;
631 }
632
633 ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->uobject.id);
634
635 if (ret == -EAGAIN)
636 goto retry;
637 if (ret)
638 goto err_up;
639
640 memset(&resp, 0, sizeof resp);
641 resp.cq_handle = uobj->uobject.id;
642 resp.cqe = cq->cqe;
643
644 if (copy_to_user((void __user *) (unsigned long) cmd.response,
645 &resp, sizeof resp)) {
646 ret = -EFAULT;
647 goto err_idr;
648 }
649
650 down(&file->mutex);
651 list_add_tail(&uobj->uobject.list, &file->ucontext->cq_list);
652 up(&file->mutex);
653
654 up(&ib_uverbs_idr_mutex);
655
656 return in_len;
657
658 err_idr:
659 idr_remove(&ib_uverbs_cq_idr, uobj->uobject.id);
660
661 err_up:
662 up(&ib_uverbs_idr_mutex);
663 ib_destroy_cq(cq);
664
665 err:
666 kfree(uobj);
667 return ret;
668 }
669
670 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
671 const char __user *buf, int in_len,
672 int out_len)
673 {
674 struct ib_uverbs_poll_cq cmd;
675 struct ib_uverbs_poll_cq_resp *resp;
676 struct ib_cq *cq;
677 struct ib_wc *wc;
678 int ret = 0;
679 int i;
680 int rsize;
681
682 if (copy_from_user(&cmd, buf, sizeof cmd))
683 return -EFAULT;
684
685 wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
686 if (!wc)
687 return -ENOMEM;
688
689 rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
690 resp = kmalloc(rsize, GFP_KERNEL);
691 if (!resp) {
692 ret = -ENOMEM;
693 goto out_wc;
694 }
695
696 down(&ib_uverbs_idr_mutex);
697 cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
698 if (!cq || cq->uobject->context != file->ucontext) {
699 ret = -EINVAL;
700 goto out;
701 }
702
703 resp->count = ib_poll_cq(cq, cmd.ne, wc);
704
705 for (i = 0; i < resp->count; i++) {
706 resp->wc[i].wr_id = wc[i].wr_id;
707 resp->wc[i].status = wc[i].status;
708 resp->wc[i].opcode = wc[i].opcode;
709 resp->wc[i].vendor_err = wc[i].vendor_err;
710 resp->wc[i].byte_len = wc[i].byte_len;
711 resp->wc[i].imm_data = (__u32 __force) wc[i].imm_data;
712 resp->wc[i].qp_num = wc[i].qp_num;
713 resp->wc[i].src_qp = wc[i].src_qp;
714 resp->wc[i].wc_flags = wc[i].wc_flags;
715 resp->wc[i].pkey_index = wc[i].pkey_index;
716 resp->wc[i].slid = wc[i].slid;
717 resp->wc[i].sl = wc[i].sl;
718 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
719 resp->wc[i].port_num = wc[i].port_num;
720 }
721
722 if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
723 ret = -EFAULT;
724
725 out:
726 up(&ib_uverbs_idr_mutex);
727 kfree(resp);
728
729 out_wc:
730 kfree(wc);
731 return ret ? ret : in_len;
732 }
733
734 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
735 const char __user *buf, int in_len,
736 int out_len)
737 {
738 struct ib_uverbs_req_notify_cq cmd;
739 struct ib_cq *cq;
740 int ret = -EINVAL;
741
742 if (copy_from_user(&cmd, buf, sizeof cmd))
743 return -EFAULT;
744
745 down(&ib_uverbs_idr_mutex);
746 cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
747 if (cq && cq->uobject->context == file->ucontext) {
748 ib_req_notify_cq(cq, cmd.solicited_only ?
749 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
750 ret = in_len;
751 }
752 up(&ib_uverbs_idr_mutex);
753
754 return ret;
755 }
756
757 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
758 const char __user *buf, int in_len,
759 int out_len)
760 {
761 struct ib_uverbs_destroy_cq cmd;
762 struct ib_uverbs_destroy_cq_resp resp;
763 struct ib_cq *cq;
764 struct ib_ucq_object *uobj;
765 struct ib_uverbs_event_file *ev_file;
766 u64 user_handle;
767 int ret = -EINVAL;
768
769 if (copy_from_user(&cmd, buf, sizeof cmd))
770 return -EFAULT;
771
772 memset(&resp, 0, sizeof resp);
773
774 down(&ib_uverbs_idr_mutex);
775
776 cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
777 if (!cq || cq->uobject->context != file->ucontext)
778 goto out;
779
780 user_handle = cq->uobject->user_handle;
781 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
782 ev_file = cq->cq_context;
783
784 ret = ib_destroy_cq(cq);
785 if (ret)
786 goto out;
787
788 idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle);
789
790 down(&file->mutex);
791 list_del(&uobj->uobject.list);
792 up(&file->mutex);
793
794 ib_uverbs_release_ucq(file, ev_file, uobj);
795
796 resp.comp_events_reported = uobj->comp_events_reported;
797 resp.async_events_reported = uobj->async_events_reported;
798
799 kfree(uobj);
800
801 if (copy_to_user((void __user *) (unsigned long) cmd.response,
802 &resp, sizeof resp))
803 ret = -EFAULT;
804
805 out:
806 up(&ib_uverbs_idr_mutex);
807
808 return ret ? ret : in_len;
809 }
810
811 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
812 const char __user *buf, int in_len,
813 int out_len)
814 {
815 struct ib_uverbs_create_qp cmd;
816 struct ib_uverbs_create_qp_resp resp;
817 struct ib_udata udata;
818 struct ib_uqp_object *uobj;
819 struct ib_pd *pd;
820 struct ib_cq *scq, *rcq;
821 struct ib_srq *srq;
822 struct ib_qp *qp;
823 struct ib_qp_init_attr attr;
824 int ret;
825
826 if (out_len < sizeof resp)
827 return -ENOSPC;
828
829 if (copy_from_user(&cmd, buf, sizeof cmd))
830 return -EFAULT;
831
832 INIT_UDATA(&udata, buf + sizeof cmd,
833 (unsigned long) cmd.response + sizeof resp,
834 in_len - sizeof cmd, out_len - sizeof resp);
835
836 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
837 if (!uobj)
838 return -ENOMEM;
839
840 down(&ib_uverbs_idr_mutex);
841
842 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
843 scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle);
844 rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle);
845 srq = cmd.is_srq ? idr_find(&ib_uverbs_srq_idr, cmd.srq_handle) : NULL;
846
847 if (!pd || pd->uobject->context != file->ucontext ||
848 !scq || scq->uobject->context != file->ucontext ||
849 !rcq || rcq->uobject->context != file->ucontext ||
850 (cmd.is_srq && (!srq || srq->uobject->context != file->ucontext))) {
851 ret = -EINVAL;
852 goto err_up;
853 }
854
855 attr.event_handler = ib_uverbs_qp_event_handler;
856 attr.qp_context = file;
857 attr.send_cq = scq;
858 attr.recv_cq = rcq;
859 attr.srq = srq;
860 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
861 attr.qp_type = cmd.qp_type;
862
863 attr.cap.max_send_wr = cmd.max_send_wr;
864 attr.cap.max_recv_wr = cmd.max_recv_wr;
865 attr.cap.max_send_sge = cmd.max_send_sge;
866 attr.cap.max_recv_sge = cmd.max_recv_sge;
867 attr.cap.max_inline_data = cmd.max_inline_data;
868
869 uobj->uevent.uobject.user_handle = cmd.user_handle;
870 uobj->uevent.uobject.context = file->ucontext;
871 uobj->uevent.events_reported = 0;
872 INIT_LIST_HEAD(&uobj->uevent.event_list);
873 INIT_LIST_HEAD(&uobj->mcast_list);
874
875 qp = pd->device->create_qp(pd, &attr, &udata);
876 if (IS_ERR(qp)) {
877 ret = PTR_ERR(qp);
878 goto err_up;
879 }
880
881 qp->device = pd->device;
882 qp->pd = pd;
883 qp->send_cq = attr.send_cq;
884 qp->recv_cq = attr.recv_cq;
885 qp->srq = attr.srq;
886 qp->uobject = &uobj->uevent.uobject;
887 qp->event_handler = attr.event_handler;
888 qp->qp_context = attr.qp_context;
889 qp->qp_type = attr.qp_type;
890 atomic_inc(&pd->usecnt);
891 atomic_inc(&attr.send_cq->usecnt);
892 atomic_inc(&attr.recv_cq->usecnt);
893 if (attr.srq)
894 atomic_inc(&attr.srq->usecnt);
895
896 memset(&resp, 0, sizeof resp);
897 resp.qpn = qp->qp_num;
898
899 retry:
900 if (!idr_pre_get(&ib_uverbs_qp_idr, GFP_KERNEL)) {
901 ret = -ENOMEM;
902 goto err_destroy;
903 }
904
905 ret = idr_get_new(&ib_uverbs_qp_idr, qp, &uobj->uevent.uobject.id);
906
907 if (ret == -EAGAIN)
908 goto retry;
909 if (ret)
910 goto err_destroy;
911
912 resp.qp_handle = uobj->uevent.uobject.id;
913 resp.max_recv_sge = attr.cap.max_recv_sge;
914 resp.max_send_sge = attr.cap.max_send_sge;
915 resp.max_recv_wr = attr.cap.max_recv_wr;
916 resp.max_send_wr = attr.cap.max_send_wr;
917 resp.max_inline_data = attr.cap.max_inline_data;
918
919 if (copy_to_user((void __user *) (unsigned long) cmd.response,
920 &resp, sizeof resp)) {
921 ret = -EFAULT;
922 goto err_idr;
923 }
924
925 down(&file->mutex);
926 list_add_tail(&uobj->uevent.uobject.list, &file->ucontext->qp_list);
927 up(&file->mutex);
928
929 up(&ib_uverbs_idr_mutex);
930
931 return in_len;
932
933 err_idr:
934 idr_remove(&ib_uverbs_qp_idr, uobj->uevent.uobject.id);
935
936 err_destroy:
937 ib_destroy_qp(qp);
938
939 err_up:
940 up(&ib_uverbs_idr_mutex);
941
942 kfree(uobj);
943 return ret;
944 }
945
946 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
947 const char __user *buf, int in_len,
948 int out_len)
949 {
950 struct ib_uverbs_modify_qp cmd;
951 struct ib_qp *qp;
952 struct ib_qp_attr *attr;
953 int ret;
954
955 if (copy_from_user(&cmd, buf, sizeof cmd))
956 return -EFAULT;
957
958 attr = kmalloc(sizeof *attr, GFP_KERNEL);
959 if (!attr)
960 return -ENOMEM;
961
962 down(&ib_uverbs_idr_mutex);
963
964 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
965 if (!qp || qp->uobject->context != file->ucontext) {
966 ret = -EINVAL;
967 goto out;
968 }
969
970 attr->qp_state = cmd.qp_state;
971 attr->cur_qp_state = cmd.cur_qp_state;
972 attr->path_mtu = cmd.path_mtu;
973 attr->path_mig_state = cmd.path_mig_state;
974 attr->qkey = cmd.qkey;
975 attr->rq_psn = cmd.rq_psn;
976 attr->sq_psn = cmd.sq_psn;
977 attr->dest_qp_num = cmd.dest_qp_num;
978 attr->qp_access_flags = cmd.qp_access_flags;
979 attr->pkey_index = cmd.pkey_index;
980 attr->alt_pkey_index = cmd.pkey_index;
981 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
982 attr->max_rd_atomic = cmd.max_rd_atomic;
983 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
984 attr->min_rnr_timer = cmd.min_rnr_timer;
985 attr->port_num = cmd.port_num;
986 attr->timeout = cmd.timeout;
987 attr->retry_cnt = cmd.retry_cnt;
988 attr->rnr_retry = cmd.rnr_retry;
989 attr->alt_port_num = cmd.alt_port_num;
990 attr->alt_timeout = cmd.alt_timeout;
991
992 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
993 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
994 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
995 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
996 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
997 attr->ah_attr.dlid = cmd.dest.dlid;
998 attr->ah_attr.sl = cmd.dest.sl;
999 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1000 attr->ah_attr.static_rate = cmd.dest.static_rate;
1001 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1002 attr->ah_attr.port_num = cmd.dest.port_num;
1003
1004 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1005 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1006 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1007 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1008 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1009 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1010 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1011 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1012 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1013 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1014 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1015
1016 ret = ib_modify_qp(qp, attr, cmd.attr_mask);
1017 if (ret)
1018 goto out;
1019
1020 ret = in_len;
1021
1022 out:
1023 up(&ib_uverbs_idr_mutex);
1024 kfree(attr);
1025
1026 return ret;
1027 }
1028
1029 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1030 const char __user *buf, int in_len,
1031 int out_len)
1032 {
1033 struct ib_uverbs_destroy_qp cmd;
1034 struct ib_uverbs_destroy_qp_resp resp;
1035 struct ib_qp *qp;
1036 struct ib_uqp_object *uobj;
1037 int ret = -EINVAL;
1038
1039 if (copy_from_user(&cmd, buf, sizeof cmd))
1040 return -EFAULT;
1041
1042 memset(&resp, 0, sizeof resp);
1043
1044 down(&ib_uverbs_idr_mutex);
1045
1046 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1047 if (!qp || qp->uobject->context != file->ucontext)
1048 goto out;
1049
1050 uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1051
1052 if (!list_empty(&uobj->mcast_list)) {
1053 ret = -EBUSY;
1054 goto out;
1055 }
1056
1057 ret = ib_destroy_qp(qp);
1058 if (ret)
1059 goto out;
1060
1061 idr_remove(&ib_uverbs_qp_idr, cmd.qp_handle);
1062
1063 down(&file->mutex);
1064 list_del(&uobj->uevent.uobject.list);
1065 up(&file->mutex);
1066
1067 ib_uverbs_release_uevent(file, &uobj->uevent);
1068
1069 resp.events_reported = uobj->uevent.events_reported;
1070
1071 kfree(uobj);
1072
1073 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1074 &resp, sizeof resp))
1075 ret = -EFAULT;
1076
1077 out:
1078 up(&ib_uverbs_idr_mutex);
1079
1080 return ret ? ret : in_len;
1081 }
1082
1083 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1084 const char __user *buf, int in_len,
1085 int out_len)
1086 {
1087 struct ib_uverbs_post_send cmd;
1088 struct ib_uverbs_post_send_resp resp;
1089 struct ib_uverbs_send_wr *user_wr;
1090 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1091 struct ib_qp *qp;
1092 int i, sg_ind;
1093 ssize_t ret = -EINVAL;
1094
1095 if (copy_from_user(&cmd, buf, sizeof cmd))
1096 return -EFAULT;
1097
1098 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1099 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1100 return -EINVAL;
1101
1102 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1103 return -EINVAL;
1104
1105 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1106 if (!user_wr)
1107 return -ENOMEM;
1108
1109 down(&ib_uverbs_idr_mutex);
1110
1111 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1112 if (!qp || qp->uobject->context != file->ucontext)
1113 goto out;
1114
1115 sg_ind = 0;
1116 last = NULL;
1117 for (i = 0; i < cmd.wr_count; ++i) {
1118 if (copy_from_user(user_wr,
1119 buf + sizeof cmd + i * cmd.wqe_size,
1120 cmd.wqe_size)) {
1121 ret = -EFAULT;
1122 goto out;
1123 }
1124
1125 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1126 ret = -EINVAL;
1127 goto out;
1128 }
1129
1130 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1131 user_wr->num_sge * sizeof (struct ib_sge),
1132 GFP_KERNEL);
1133 if (!next) {
1134 ret = -ENOMEM;
1135 goto out;
1136 }
1137
1138 if (!last)
1139 wr = next;
1140 else
1141 last->next = next;
1142 last = next;
1143
1144 next->next = NULL;
1145 next->wr_id = user_wr->wr_id;
1146 next->num_sge = user_wr->num_sge;
1147 next->opcode = user_wr->opcode;
1148 next->send_flags = user_wr->send_flags;
1149 next->imm_data = (__be32 __force) user_wr->imm_data;
1150
1151 if (qp->qp_type == IB_QPT_UD) {
1152 next->wr.ud.ah = idr_find(&ib_uverbs_ah_idr,
1153 user_wr->wr.ud.ah);
1154 if (!next->wr.ud.ah) {
1155 ret = -EINVAL;
1156 goto out;
1157 }
1158 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1159 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1160 } else {
1161 switch (next->opcode) {
1162 case IB_WR_RDMA_WRITE:
1163 case IB_WR_RDMA_WRITE_WITH_IMM:
1164 case IB_WR_RDMA_READ:
1165 next->wr.rdma.remote_addr =
1166 user_wr->wr.rdma.remote_addr;
1167 next->wr.rdma.rkey =
1168 user_wr->wr.rdma.rkey;
1169 break;
1170 case IB_WR_ATOMIC_CMP_AND_SWP:
1171 case IB_WR_ATOMIC_FETCH_AND_ADD:
1172 next->wr.atomic.remote_addr =
1173 user_wr->wr.atomic.remote_addr;
1174 next->wr.atomic.compare_add =
1175 user_wr->wr.atomic.compare_add;
1176 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1177 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1178 break;
1179 default:
1180 break;
1181 }
1182 }
1183
1184 if (next->num_sge) {
1185 next->sg_list = (void *) next +
1186 ALIGN(sizeof *next, sizeof (struct ib_sge));
1187 if (copy_from_user(next->sg_list,
1188 buf + sizeof cmd +
1189 cmd.wr_count * cmd.wqe_size +
1190 sg_ind * sizeof (struct ib_sge),
1191 next->num_sge * sizeof (struct ib_sge))) {
1192 ret = -EFAULT;
1193 goto out;
1194 }
1195 sg_ind += next->num_sge;
1196 } else
1197 next->sg_list = NULL;
1198 }
1199
1200 resp.bad_wr = 0;
1201 ret = qp->device->post_send(qp, wr, &bad_wr);
1202 if (ret)
1203 for (next = wr; next; next = next->next) {
1204 ++resp.bad_wr;
1205 if (next == bad_wr)
1206 break;
1207 }
1208
1209 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1210 &resp, sizeof resp))
1211 ret = -EFAULT;
1212
1213 out:
1214 up(&ib_uverbs_idr_mutex);
1215
1216 while (wr) {
1217 next = wr->next;
1218 kfree(wr);
1219 wr = next;
1220 }
1221
1222 kfree(user_wr);
1223
1224 return ret ? ret : in_len;
1225 }
1226
1227 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1228 int in_len,
1229 u32 wr_count,
1230 u32 sge_count,
1231 u32 wqe_size)
1232 {
1233 struct ib_uverbs_recv_wr *user_wr;
1234 struct ib_recv_wr *wr = NULL, *last, *next;
1235 int sg_ind;
1236 int i;
1237 int ret;
1238
1239 if (in_len < wqe_size * wr_count +
1240 sge_count * sizeof (struct ib_uverbs_sge))
1241 return ERR_PTR(-EINVAL);
1242
1243 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1244 return ERR_PTR(-EINVAL);
1245
1246 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1247 if (!user_wr)
1248 return ERR_PTR(-ENOMEM);
1249
1250 sg_ind = 0;
1251 last = NULL;
1252 for (i = 0; i < wr_count; ++i) {
1253 if (copy_from_user(user_wr, buf + i * wqe_size,
1254 wqe_size)) {
1255 ret = -EFAULT;
1256 goto err;
1257 }
1258
1259 if (user_wr->num_sge + sg_ind > sge_count) {
1260 ret = -EINVAL;
1261 goto err;
1262 }
1263
1264 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1265 user_wr->num_sge * sizeof (struct ib_sge),
1266 GFP_KERNEL);
1267 if (!next) {
1268 ret = -ENOMEM;
1269 goto err;
1270 }
1271
1272 if (!last)
1273 wr = next;
1274 else
1275 last->next = next;
1276 last = next;
1277
1278 next->next = NULL;
1279 next->wr_id = user_wr->wr_id;
1280 next->num_sge = user_wr->num_sge;
1281
1282 if (next->num_sge) {
1283 next->sg_list = (void *) next +
1284 ALIGN(sizeof *next, sizeof (struct ib_sge));
1285 if (copy_from_user(next->sg_list,
1286 buf + wr_count * wqe_size +
1287 sg_ind * sizeof (struct ib_sge),
1288 next->num_sge * sizeof (struct ib_sge))) {
1289 ret = -EFAULT;
1290 goto err;
1291 }
1292 sg_ind += next->num_sge;
1293 } else
1294 next->sg_list = NULL;
1295 }
1296
1297 kfree(user_wr);
1298 return wr;
1299
1300 err:
1301 kfree(user_wr);
1302
1303 while (wr) {
1304 next = wr->next;
1305 kfree(wr);
1306 wr = next;
1307 }
1308
1309 return ERR_PTR(ret);
1310 }
1311
1312 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1313 const char __user *buf, int in_len,
1314 int out_len)
1315 {
1316 struct ib_uverbs_post_recv cmd;
1317 struct ib_uverbs_post_recv_resp resp;
1318 struct ib_recv_wr *wr, *next, *bad_wr;
1319 struct ib_qp *qp;
1320 ssize_t ret = -EINVAL;
1321
1322 if (copy_from_user(&cmd, buf, sizeof cmd))
1323 return -EFAULT;
1324
1325 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1326 in_len - sizeof cmd, cmd.wr_count,
1327 cmd.sge_count, cmd.wqe_size);
1328 if (IS_ERR(wr))
1329 return PTR_ERR(wr);
1330
1331 down(&ib_uverbs_idr_mutex);
1332
1333 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1334 if (!qp || qp->uobject->context != file->ucontext)
1335 goto out;
1336
1337 resp.bad_wr = 0;
1338 ret = qp->device->post_recv(qp, wr, &bad_wr);
1339 if (ret)
1340 for (next = wr; next; next = next->next) {
1341 ++resp.bad_wr;
1342 if (next == bad_wr)
1343 break;
1344 }
1345
1346
1347 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1348 &resp, sizeof resp))
1349 ret = -EFAULT;
1350
1351 out:
1352 up(&ib_uverbs_idr_mutex);
1353
1354 while (wr) {
1355 next = wr->next;
1356 kfree(wr);
1357 wr = next;
1358 }
1359
1360 return ret ? ret : in_len;
1361 }
1362
1363 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1364 const char __user *buf, int in_len,
1365 int out_len)
1366 {
1367 struct ib_uverbs_post_srq_recv cmd;
1368 struct ib_uverbs_post_srq_recv_resp resp;
1369 struct ib_recv_wr *wr, *next, *bad_wr;
1370 struct ib_srq *srq;
1371 ssize_t ret = -EINVAL;
1372
1373 if (copy_from_user(&cmd, buf, sizeof cmd))
1374 return -EFAULT;
1375
1376 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1377 in_len - sizeof cmd, cmd.wr_count,
1378 cmd.sge_count, cmd.wqe_size);
1379 if (IS_ERR(wr))
1380 return PTR_ERR(wr);
1381
1382 down(&ib_uverbs_idr_mutex);
1383
1384 srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1385 if (!srq || srq->uobject->context != file->ucontext)
1386 goto out;
1387
1388 resp.bad_wr = 0;
1389 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1390 if (ret)
1391 for (next = wr; next; next = next->next) {
1392 ++resp.bad_wr;
1393 if (next == bad_wr)
1394 break;
1395 }
1396
1397
1398 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1399 &resp, sizeof resp))
1400 ret = -EFAULT;
1401
1402 out:
1403 up(&ib_uverbs_idr_mutex);
1404
1405 while (wr) {
1406 next = wr->next;
1407 kfree(wr);
1408 wr = next;
1409 }
1410
1411 return ret ? ret : in_len;
1412 }
1413
1414 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1415 const char __user *buf, int in_len,
1416 int out_len)
1417 {
1418 struct ib_uverbs_create_ah cmd;
1419 struct ib_uverbs_create_ah_resp resp;
1420 struct ib_uobject *uobj;
1421 struct ib_pd *pd;
1422 struct ib_ah *ah;
1423 struct ib_ah_attr attr;
1424 int ret;
1425
1426 if (out_len < sizeof resp)
1427 return -ENOSPC;
1428
1429 if (copy_from_user(&cmd, buf, sizeof cmd))
1430 return -EFAULT;
1431
1432 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1433 if (!uobj)
1434 return -ENOMEM;
1435
1436 down(&ib_uverbs_idr_mutex);
1437
1438 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
1439 if (!pd || pd->uobject->context != file->ucontext) {
1440 ret = -EINVAL;
1441 goto err_up;
1442 }
1443
1444 uobj->user_handle = cmd.user_handle;
1445 uobj->context = file->ucontext;
1446
1447 attr.dlid = cmd.attr.dlid;
1448 attr.sl = cmd.attr.sl;
1449 attr.src_path_bits = cmd.attr.src_path_bits;
1450 attr.static_rate = cmd.attr.static_rate;
1451 attr.port_num = cmd.attr.port_num;
1452 attr.grh.flow_label = cmd.attr.grh.flow_label;
1453 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1454 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1455 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1456 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1457
1458 ah = ib_create_ah(pd, &attr);
1459 if (IS_ERR(ah)) {
1460 ret = PTR_ERR(ah);
1461 goto err_up;
1462 }
1463
1464 ah->uobject = uobj;
1465
1466 retry:
1467 if (!idr_pre_get(&ib_uverbs_ah_idr, GFP_KERNEL)) {
1468 ret = -ENOMEM;
1469 goto err_destroy;
1470 }
1471
1472 ret = idr_get_new(&ib_uverbs_ah_idr, ah, &uobj->id);
1473
1474 if (ret == -EAGAIN)
1475 goto retry;
1476 if (ret)
1477 goto err_destroy;
1478
1479 resp.ah_handle = uobj->id;
1480
1481 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1482 &resp, sizeof resp)) {
1483 ret = -EFAULT;
1484 goto err_idr;
1485 }
1486
1487 down(&file->mutex);
1488 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1489 up(&file->mutex);
1490
1491 up(&ib_uverbs_idr_mutex);
1492
1493 return in_len;
1494
1495 err_idr:
1496 idr_remove(&ib_uverbs_ah_idr, uobj->id);
1497
1498 err_destroy:
1499 ib_destroy_ah(ah);
1500
1501 err_up:
1502 up(&ib_uverbs_idr_mutex);
1503
1504 kfree(uobj);
1505 return ret;
1506 }
1507
1508 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1509 const char __user *buf, int in_len, int out_len)
1510 {
1511 struct ib_uverbs_destroy_ah cmd;
1512 struct ib_ah *ah;
1513 struct ib_uobject *uobj;
1514 int ret = -EINVAL;
1515
1516 if (copy_from_user(&cmd, buf, sizeof cmd))
1517 return -EFAULT;
1518
1519 down(&ib_uverbs_idr_mutex);
1520
1521 ah = idr_find(&ib_uverbs_ah_idr, cmd.ah_handle);
1522 if (!ah || ah->uobject->context != file->ucontext)
1523 goto out;
1524
1525 uobj = ah->uobject;
1526
1527 ret = ib_destroy_ah(ah);
1528 if (ret)
1529 goto out;
1530
1531 idr_remove(&ib_uverbs_ah_idr, cmd.ah_handle);
1532
1533 down(&file->mutex);
1534 list_del(&uobj->list);
1535 up(&file->mutex);
1536
1537 kfree(uobj);
1538
1539 out:
1540 up(&ib_uverbs_idr_mutex);
1541
1542 return ret ? ret : in_len;
1543 }
1544
1545 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1546 const char __user *buf, int in_len,
1547 int out_len)
1548 {
1549 struct ib_uverbs_attach_mcast cmd;
1550 struct ib_qp *qp;
1551 struct ib_uqp_object *uobj;
1552 struct ib_uverbs_mcast_entry *mcast;
1553 int ret = -EINVAL;
1554
1555 if (copy_from_user(&cmd, buf, sizeof cmd))
1556 return -EFAULT;
1557
1558 down(&ib_uverbs_idr_mutex);
1559
1560 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1561 if (!qp || qp->uobject->context != file->ucontext)
1562 goto out;
1563
1564 uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1565
1566 list_for_each_entry(mcast, &uobj->mcast_list, list)
1567 if (cmd.mlid == mcast->lid &&
1568 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1569 ret = 0;
1570 goto out;
1571 }
1572
1573 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1574 if (!mcast) {
1575 ret = -ENOMEM;
1576 goto out;
1577 }
1578
1579 mcast->lid = cmd.mlid;
1580 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1581
1582 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1583 if (!ret) {
1584 uobj = container_of(qp->uobject, struct ib_uqp_object,
1585 uevent.uobject);
1586 list_add_tail(&mcast->list, &uobj->mcast_list);
1587 } else
1588 kfree(mcast);
1589
1590 out:
1591 up(&ib_uverbs_idr_mutex);
1592
1593 return ret ? ret : in_len;
1594 }
1595
1596 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1597 const char __user *buf, int in_len,
1598 int out_len)
1599 {
1600 struct ib_uverbs_detach_mcast cmd;
1601 struct ib_uqp_object *uobj;
1602 struct ib_qp *qp;
1603 struct ib_uverbs_mcast_entry *mcast;
1604 int ret = -EINVAL;
1605
1606 if (copy_from_user(&cmd, buf, sizeof cmd))
1607 return -EFAULT;
1608
1609 down(&ib_uverbs_idr_mutex);
1610
1611 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1612 if (!qp || qp->uobject->context != file->ucontext)
1613 goto out;
1614
1615 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1616 if (ret)
1617 goto out;
1618
1619 uobj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1620
1621 list_for_each_entry(mcast, &uobj->mcast_list, list)
1622 if (cmd.mlid == mcast->lid &&
1623 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1624 list_del(&mcast->list);
1625 kfree(mcast);
1626 break;
1627 }
1628
1629 out:
1630 up(&ib_uverbs_idr_mutex);
1631
1632 return ret ? ret : in_len;
1633 }
1634
1635 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1636 const char __user *buf, int in_len,
1637 int out_len)
1638 {
1639 struct ib_uverbs_create_srq cmd;
1640 struct ib_uverbs_create_srq_resp resp;
1641 struct ib_udata udata;
1642 struct ib_uevent_object *uobj;
1643 struct ib_pd *pd;
1644 struct ib_srq *srq;
1645 struct ib_srq_init_attr attr;
1646 int ret;
1647
1648 if (out_len < sizeof resp)
1649 return -ENOSPC;
1650
1651 if (copy_from_user(&cmd, buf, sizeof cmd))
1652 return -EFAULT;
1653
1654 INIT_UDATA(&udata, buf + sizeof cmd,
1655 (unsigned long) cmd.response + sizeof resp,
1656 in_len - sizeof cmd, out_len - sizeof resp);
1657
1658 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1659 if (!uobj)
1660 return -ENOMEM;
1661
1662 down(&ib_uverbs_idr_mutex);
1663
1664 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
1665
1666 if (!pd || pd->uobject->context != file->ucontext) {
1667 ret = -EINVAL;
1668 goto err_up;
1669 }
1670
1671 attr.event_handler = ib_uverbs_srq_event_handler;
1672 attr.srq_context = file;
1673 attr.attr.max_wr = cmd.max_wr;
1674 attr.attr.max_sge = cmd.max_sge;
1675 attr.attr.srq_limit = cmd.srq_limit;
1676
1677 uobj->uobject.user_handle = cmd.user_handle;
1678 uobj->uobject.context = file->ucontext;
1679 uobj->events_reported = 0;
1680 INIT_LIST_HEAD(&uobj->event_list);
1681
1682 srq = pd->device->create_srq(pd, &attr, &udata);
1683 if (IS_ERR(srq)) {
1684 ret = PTR_ERR(srq);
1685 goto err_up;
1686 }
1687
1688 srq->device = pd->device;
1689 srq->pd = pd;
1690 srq->uobject = &uobj->uobject;
1691 srq->event_handler = attr.event_handler;
1692 srq->srq_context = attr.srq_context;
1693 atomic_inc(&pd->usecnt);
1694 atomic_set(&srq->usecnt, 0);
1695
1696 memset(&resp, 0, sizeof resp);
1697
1698 retry:
1699 if (!idr_pre_get(&ib_uverbs_srq_idr, GFP_KERNEL)) {
1700 ret = -ENOMEM;
1701 goto err_destroy;
1702 }
1703
1704 ret = idr_get_new(&ib_uverbs_srq_idr, srq, &uobj->uobject.id);
1705
1706 if (ret == -EAGAIN)
1707 goto retry;
1708 if (ret)
1709 goto err_destroy;
1710
1711 resp.srq_handle = uobj->uobject.id;
1712
1713 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1714 &resp, sizeof resp)) {
1715 ret = -EFAULT;
1716 goto err_idr;
1717 }
1718
1719 down(&file->mutex);
1720 list_add_tail(&uobj->uobject.list, &file->ucontext->srq_list);
1721 up(&file->mutex);
1722
1723 up(&ib_uverbs_idr_mutex);
1724
1725 return in_len;
1726
1727 err_idr:
1728 idr_remove(&ib_uverbs_srq_idr, uobj->uobject.id);
1729
1730 err_destroy:
1731 ib_destroy_srq(srq);
1732
1733 err_up:
1734 up(&ib_uverbs_idr_mutex);
1735
1736 kfree(uobj);
1737 return ret;
1738 }
1739
1740 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
1741 const char __user *buf, int in_len,
1742 int out_len)
1743 {
1744 struct ib_uverbs_modify_srq cmd;
1745 struct ib_srq *srq;
1746 struct ib_srq_attr attr;
1747 int ret;
1748
1749 if (copy_from_user(&cmd, buf, sizeof cmd))
1750 return -EFAULT;
1751
1752 down(&ib_uverbs_idr_mutex);
1753
1754 srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1755 if (!srq || srq->uobject->context != file->ucontext) {
1756 ret = -EINVAL;
1757 goto out;
1758 }
1759
1760 attr.max_wr = cmd.max_wr;
1761 attr.srq_limit = cmd.srq_limit;
1762
1763 ret = ib_modify_srq(srq, &attr, cmd.attr_mask);
1764
1765 out:
1766 up(&ib_uverbs_idr_mutex);
1767
1768 return ret ? ret : in_len;
1769 }
1770
1771 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
1772 const char __user *buf, int in_len,
1773 int out_len)
1774 {
1775 struct ib_uverbs_destroy_srq cmd;
1776 struct ib_uverbs_destroy_srq_resp resp;
1777 struct ib_srq *srq;
1778 struct ib_uevent_object *uobj;
1779 int ret = -EINVAL;
1780
1781 if (copy_from_user(&cmd, buf, sizeof cmd))
1782 return -EFAULT;
1783
1784 down(&ib_uverbs_idr_mutex);
1785
1786 memset(&resp, 0, sizeof resp);
1787
1788 srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1789 if (!srq || srq->uobject->context != file->ucontext)
1790 goto out;
1791
1792 uobj = container_of(srq->uobject, struct ib_uevent_object, uobject);
1793
1794 ret = ib_destroy_srq(srq);
1795 if (ret)
1796 goto out;
1797
1798 idr_remove(&ib_uverbs_srq_idr, cmd.srq_handle);
1799
1800 down(&file->mutex);
1801 list_del(&uobj->uobject.list);
1802 up(&file->mutex);
1803
1804 ib_uverbs_release_uevent(file, uobj);
1805
1806 resp.events_reported = uobj->events_reported;
1807
1808 kfree(uobj);
1809
1810 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1811 &resp, sizeof resp))
1812 ret = -EFAULT;
1813
1814 out:
1815 up(&ib_uverbs_idr_mutex);
1816
1817 return ret ? ret : in_len;
1818 }
Linux kernel - Deliverables
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