1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36 #include <linux/file.h>
37 #include <linux/fs.h>
38
39 #include <asm/uaccess.h>
40
41 #include "uverbs.h"
42
43 static struct lock_class_key pd_lock_key;
44 static struct lock_class_key mr_lock_key;
45 static struct lock_class_key cq_lock_key;
46 static struct lock_class_key qp_lock_key;
47 static struct lock_class_key ah_lock_key;
48 static struct lock_class_key srq_lock_key;
49
50 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
51 do { \
52 (udata)->inbuf = (void __user *) (ibuf); \
53 (udata)->outbuf = (void __user *) (obuf); \
54 (udata)->inlen = (ilen); \
55 (udata)->outlen = (olen); \
56 } while (0)
57
58 /*
59 * The ib_uobject locking scheme is as follows:
60 *
61 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
62 * needs to be held during all idr operations. When an object is
63 * looked up, a reference must be taken on the object's kref before
64 * dropping this lock.
65 *
66 * - Each object also has an rwsem. This rwsem must be held for
67 * reading while an operation that uses the object is performed.
68 * For example, while registering an MR, the associated PD's
69 * uobject.mutex must be held for reading. The rwsem must be held
70 * for writing while initializing or destroying an object.
71 *
72 * - In addition, each object has a "live" flag. If this flag is not
73 * set, then lookups of the object will fail even if it is found in
74 * the idr. This handles a reader that blocks and does not acquire
75 * the rwsem until after the object is destroyed. The destroy
76 * operation will set the live flag to 0 and then drop the rwsem;
77 * this will allow the reader to acquire the rwsem, see that the
78 * live flag is 0, and then drop the rwsem and its reference to
79 * object. The underlying storage will not be freed until the last
80 * reference to the object is dropped.
81 */
82
83 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
84 struct ib_ucontext *context, struct lock_class_key *key)
85 {
86 uobj->user_handle = user_handle;
87 uobj->context = context;
88 kref_init(&uobj->ref);
89 init_rwsem(&uobj->mutex);
90 lockdep_set_class(&uobj->mutex, key);
91 uobj->live = 0;
92 }
93
94 static void release_uobj(struct kref *kref)
95 {
96 kfree(container_of(kref, struct ib_uobject, ref));
97 }
98
99 static void put_uobj(struct ib_uobject *uobj)
100 {
101 kref_put(&uobj->ref, release_uobj);
102 }
103
104 static void put_uobj_read(struct ib_uobject *uobj)
105 {
106 up_read(&uobj->mutex);
107 put_uobj(uobj);
108 }
109
110 static void put_uobj_write(struct ib_uobject *uobj)
111 {
112 up_write(&uobj->mutex);
113 put_uobj(uobj);
114 }
115
116 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
117 {
118 int ret;
119
120 retry:
121 if (!idr_pre_get(idr, GFP_KERNEL))
122 return -ENOMEM;
123
124 spin_lock(&ib_uverbs_idr_lock);
125 ret = idr_get_new(idr, uobj, &uobj->id);
126 spin_unlock(&ib_uverbs_idr_lock);
127
128 if (ret == -EAGAIN)
129 goto retry;
130
131 return ret;
132 }
133
134 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
135 {
136 spin_lock(&ib_uverbs_idr_lock);
137 idr_remove(idr, uobj->id);
138 spin_unlock(&ib_uverbs_idr_lock);
139 }
140
141 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
142 struct ib_ucontext *context)
143 {
144 struct ib_uobject *uobj;
145
146 spin_lock(&ib_uverbs_idr_lock);
147 uobj = idr_find(idr, id);
148 if (uobj) {
149 if (uobj->context == context)
150 kref_get(&uobj->ref);
151 else
152 uobj = NULL;
153 }
154 spin_unlock(&ib_uverbs_idr_lock);
155
156 return uobj;
157 }
158
159 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
160 struct ib_ucontext *context, int nested)
161 {
162 struct ib_uobject *uobj;
163
164 uobj = __idr_get_uobj(idr, id, context);
165 if (!uobj)
166 return NULL;
167
168 if (nested)
169 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
170 else
171 down_read(&uobj->mutex);
172 if (!uobj->live) {
173 put_uobj_read(uobj);
174 return NULL;
175 }
176
177 return uobj;
178 }
179
180 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
181 struct ib_ucontext *context)
182 {
183 struct ib_uobject *uobj;
184
185 uobj = __idr_get_uobj(idr, id, context);
186 if (!uobj)
187 return NULL;
188
189 down_write(&uobj->mutex);
190 if (!uobj->live) {
191 put_uobj_write(uobj);
192 return NULL;
193 }
194
195 return uobj;
196 }
197
198 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
199 int nested)
200 {
201 struct ib_uobject *uobj;
202
203 uobj = idr_read_uobj(idr, id, context, nested);
204 return uobj ? uobj->object : NULL;
205 }
206
207 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
208 {
209 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
210 }
211
212 static void put_pd_read(struct ib_pd *pd)
213 {
214 put_uobj_read(pd->uobject);
215 }
216
217 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
218 {
219 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
220 }
221
222 static void put_cq_read(struct ib_cq *cq)
223 {
224 put_uobj_read(cq->uobject);
225 }
226
227 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
228 {
229 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
230 }
231
232 static void put_ah_read(struct ib_ah *ah)
233 {
234 put_uobj_read(ah->uobject);
235 }
236
237 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
238 {
239 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
240 }
241
242 static void put_qp_read(struct ib_qp *qp)
243 {
244 put_uobj_read(qp->uobject);
245 }
246
247 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
248 {
249 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
250 }
251
252 static void put_srq_read(struct ib_srq *srq)
253 {
254 put_uobj_read(srq->uobject);
255 }
256
257 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
258 const char __user *buf,
259 int in_len, int out_len)
260 {
261 struct ib_uverbs_get_context cmd;
262 struct ib_uverbs_get_context_resp resp;
263 struct ib_udata udata;
264 struct ib_device *ibdev = file->device->ib_dev;
265 struct ib_ucontext *ucontext;
266 struct file *filp;
267 int ret;
268
269 if (out_len < sizeof resp)
270 return -ENOSPC;
271
272 if (copy_from_user(&cmd, buf, sizeof cmd))
273 return -EFAULT;
274
275 mutex_lock(&file->mutex);
276
277 if (file->ucontext) {
278 ret = -EINVAL;
279 goto err;
280 }
281
282 INIT_UDATA(&udata, buf + sizeof cmd,
283 (unsigned long) cmd.response + sizeof resp,
284 in_len - sizeof cmd, out_len - sizeof resp);
285
286 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
287 if (IS_ERR(ucontext)) {
288 ret = PTR_ERR(file->ucontext);
289 goto err;
290 }
291
292 ucontext->device = ibdev;
293 INIT_LIST_HEAD(&ucontext->pd_list);
294 INIT_LIST_HEAD(&ucontext->mr_list);
295 INIT_LIST_HEAD(&ucontext->mw_list);
296 INIT_LIST_HEAD(&ucontext->cq_list);
297 INIT_LIST_HEAD(&ucontext->qp_list);
298 INIT_LIST_HEAD(&ucontext->srq_list);
299 INIT_LIST_HEAD(&ucontext->ah_list);
300 ucontext->closing = 0;
301
302 resp.num_comp_vectors = file->device->num_comp_vectors;
303
304 filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
305 if (IS_ERR(filp)) {
306 ret = PTR_ERR(filp);
307 goto err_free;
308 }
309
310 if (copy_to_user((void __user *) (unsigned long) cmd.response,
311 &resp, sizeof resp)) {
312 ret = -EFAULT;
313 goto err_file;
314 }
315
316 file->async_file = filp->private_data;
317
318 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
319 ib_uverbs_event_handler);
320 ret = ib_register_event_handler(&file->event_handler);
321 if (ret)
322 goto err_file;
323
324 kref_get(&file->async_file->ref);
325 kref_get(&file->ref);
326 file->ucontext = ucontext;
327
328 fd_install(resp.async_fd, filp);
329
330 mutex_unlock(&file->mutex);
331
332 return in_len;
333
334 err_file:
335 put_unused_fd(resp.async_fd);
336 fput(filp);
337
338 err_free:
339 ibdev->dealloc_ucontext(ucontext);
340
341 err:
342 mutex_unlock(&file->mutex);
343 return ret;
344 }
345
346 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
347 const char __user *buf,
348 int in_len, int out_len)
349 {
350 struct ib_uverbs_query_device cmd;
351 struct ib_uverbs_query_device_resp resp;
352 struct ib_device_attr attr;
353 int ret;
354
355 if (out_len < sizeof resp)
356 return -ENOSPC;
357
358 if (copy_from_user(&cmd, buf, sizeof cmd))
359 return -EFAULT;
360
361 ret = ib_query_device(file->device->ib_dev, &attr);
362 if (ret)
363 return ret;
364
365 memset(&resp, 0, sizeof resp);
366
367 resp.fw_ver = attr.fw_ver;
368 resp.node_guid = file->device->ib_dev->node_guid;
369 resp.sys_image_guid = attr.sys_image_guid;
370 resp.max_mr_size = attr.max_mr_size;
371 resp.page_size_cap = attr.page_size_cap;
372 resp.vendor_id = attr.vendor_id;
373 resp.vendor_part_id = attr.vendor_part_id;
374 resp.hw_ver = attr.hw_ver;
375 resp.max_qp = attr.max_qp;
376 resp.max_qp_wr = attr.max_qp_wr;
377 resp.device_cap_flags = attr.device_cap_flags;
378 resp.max_sge = attr.max_sge;
379 resp.max_sge_rd = attr.max_sge_rd;
380 resp.max_cq = attr.max_cq;
381 resp.max_cqe = attr.max_cqe;
382 resp.max_mr = attr.max_mr;
383 resp.max_pd = attr.max_pd;
384 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
385 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
386 resp.max_res_rd_atom = attr.max_res_rd_atom;
387 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
388 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
389 resp.atomic_cap = attr.atomic_cap;
390 resp.max_ee = attr.max_ee;
391 resp.max_rdd = attr.max_rdd;
392 resp.max_mw = attr.max_mw;
393 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
394 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
395 resp.max_mcast_grp = attr.max_mcast_grp;
396 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
397 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
398 resp.max_ah = attr.max_ah;
399 resp.max_fmr = attr.max_fmr;
400 resp.max_map_per_fmr = attr.max_map_per_fmr;
401 resp.max_srq = attr.max_srq;
402 resp.max_srq_wr = attr.max_srq_wr;
403 resp.max_srq_sge = attr.max_srq_sge;
404 resp.max_pkeys = attr.max_pkeys;
405 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
406 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
407
408 if (copy_to_user((void __user *) (unsigned long) cmd.response,
409 &resp, sizeof resp))
410 return -EFAULT;
411
412 return in_len;
413 }
414
415 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
416 const char __user *buf,
417 int in_len, int out_len)
418 {
419 struct ib_uverbs_query_port cmd;
420 struct ib_uverbs_query_port_resp resp;
421 struct ib_port_attr attr;
422 int ret;
423
424 if (out_len < sizeof resp)
425 return -ENOSPC;
426
427 if (copy_from_user(&cmd, buf, sizeof cmd))
428 return -EFAULT;
429
430 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
431 if (ret)
432 return ret;
433
434 memset(&resp, 0, sizeof resp);
435
436 resp.state = attr.state;
437 resp.max_mtu = attr.max_mtu;
438 resp.active_mtu = attr.active_mtu;
439 resp.gid_tbl_len = attr.gid_tbl_len;
440 resp.port_cap_flags = attr.port_cap_flags;
441 resp.max_msg_sz = attr.max_msg_sz;
442 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
443 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
444 resp.pkey_tbl_len = attr.pkey_tbl_len;
445 resp.lid = attr.lid;
446 resp.sm_lid = attr.sm_lid;
447 resp.lmc = attr.lmc;
448 resp.max_vl_num = attr.max_vl_num;
449 resp.sm_sl = attr.sm_sl;
450 resp.subnet_timeout = attr.subnet_timeout;
451 resp.init_type_reply = attr.init_type_reply;
452 resp.active_width = attr.active_width;
453 resp.active_speed = attr.active_speed;
454 resp.phys_state = attr.phys_state;
455
456 if (copy_to_user((void __user *) (unsigned long) cmd.response,
457 &resp, sizeof resp))
458 return -EFAULT;
459
460 return in_len;
461 }
462
463 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
464 const char __user *buf,
465 int in_len, int out_len)
466 {
467 struct ib_uverbs_alloc_pd cmd;
468 struct ib_uverbs_alloc_pd_resp resp;
469 struct ib_udata udata;
470 struct ib_uobject *uobj;
471 struct ib_pd *pd;
472 int ret;
473
474 if (out_len < sizeof resp)
475 return -ENOSPC;
476
477 if (copy_from_user(&cmd, buf, sizeof cmd))
478 return -EFAULT;
479
480 INIT_UDATA(&udata, buf + sizeof cmd,
481 (unsigned long) cmd.response + sizeof resp,
482 in_len - sizeof cmd, out_len - sizeof resp);
483
484 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
485 if (!uobj)
486 return -ENOMEM;
487
488 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
489 down_write(&uobj->mutex);
490
491 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
492 file->ucontext, &udata);
493 if (IS_ERR(pd)) {
494 ret = PTR_ERR(pd);
495 goto err;
496 }
497
498 pd->device = file->device->ib_dev;
499 pd->uobject = uobj;
500 atomic_set(&pd->usecnt, 0);
501
502 uobj->object = pd;
503 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
504 if (ret)
505 goto err_idr;
506
507 memset(&resp, 0, sizeof resp);
508 resp.pd_handle = uobj->id;
509
510 if (copy_to_user((void __user *) (unsigned long) cmd.response,
511 &resp, sizeof resp)) {
512 ret = -EFAULT;
513 goto err_copy;
514 }
515
516 mutex_lock(&file->mutex);
517 list_add_tail(&uobj->list, &file->ucontext->pd_list);
518 mutex_unlock(&file->mutex);
519
520 uobj->live = 1;
521
522 up_write(&uobj->mutex);
523
524 return in_len;
525
526 err_copy:
527 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
528
529 err_idr:
530 ib_dealloc_pd(pd);
531
532 err:
533 put_uobj_write(uobj);
534 return ret;
535 }
536
537 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
538 const char __user *buf,
539 int in_len, int out_len)
540 {
541 struct ib_uverbs_dealloc_pd cmd;
542 struct ib_uobject *uobj;
543 int ret;
544
545 if (copy_from_user(&cmd, buf, sizeof cmd))
546 return -EFAULT;
547
548 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
549 if (!uobj)
550 return -EINVAL;
551
552 ret = ib_dealloc_pd(uobj->object);
553 if (!ret)
554 uobj->live = 0;
555
556 put_uobj_write(uobj);
557
558 if (ret)
559 return ret;
560
561 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
562
563 mutex_lock(&file->mutex);
564 list_del(&uobj->list);
565 mutex_unlock(&file->mutex);
566
567 put_uobj(uobj);
568
569 return in_len;
570 }
571
572 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
573 const char __user *buf, int in_len,
574 int out_len)
575 {
576 struct ib_uverbs_reg_mr cmd;
577 struct ib_uverbs_reg_mr_resp resp;
578 struct ib_udata udata;
579 struct ib_uobject *uobj;
580 struct ib_pd *pd;
581 struct ib_mr *mr;
582 int ret;
583
584 if (out_len < sizeof resp)
585 return -ENOSPC;
586
587 if (copy_from_user(&cmd, buf, sizeof cmd))
588 return -EFAULT;
589
590 INIT_UDATA(&udata, buf + sizeof cmd,
591 (unsigned long) cmd.response + sizeof resp,
592 in_len - sizeof cmd, out_len - sizeof resp);
593
594 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
595 return -EINVAL;
596
597 /*
598 * Local write permission is required if remote write or
599 * remote atomic permission is also requested.
600 */
601 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
602 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
603 return -EINVAL;
604
605 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
606 if (!uobj)
607 return -ENOMEM;
608
609 init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
610 down_write(&uobj->mutex);
611
612 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
613 if (!pd) {
614 ret = -EINVAL;
615 goto err_free;
616 }
617
618 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
619 cmd.access_flags, &udata);
620 if (IS_ERR(mr)) {
621 ret = PTR_ERR(mr);
622 goto err_put;
623 }
624
625 mr->device = pd->device;
626 mr->pd = pd;
627 mr->uobject = uobj;
628 atomic_inc(&pd->usecnt);
629 atomic_set(&mr->usecnt, 0);
630
631 uobj->object = mr;
632 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
633 if (ret)
634 goto err_unreg;
635
636 memset(&resp, 0, sizeof resp);
637 resp.lkey = mr->lkey;
638 resp.rkey = mr->rkey;
639 resp.mr_handle = uobj->id;
640
641 if (copy_to_user((void __user *) (unsigned long) cmd.response,
642 &resp, sizeof resp)) {
643 ret = -EFAULT;
644 goto err_copy;
645 }
646
647 put_pd_read(pd);
648
649 mutex_lock(&file->mutex);
650 list_add_tail(&uobj->list, &file->ucontext->mr_list);
651 mutex_unlock(&file->mutex);
652
653 uobj->live = 1;
654
655 up_write(&uobj->mutex);
656
657 return in_len;
658
659 err_copy:
660 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
661
662 err_unreg:
663 ib_dereg_mr(mr);
664
665 err_put:
666 put_pd_read(pd);
667
668 err_free:
669 put_uobj_write(uobj);
670 return ret;
671 }
672
673 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
674 const char __user *buf, int in_len,
675 int out_len)
676 {
677 struct ib_uverbs_dereg_mr cmd;
678 struct ib_mr *mr;
679 struct ib_uobject *uobj;
680 int ret = -EINVAL;
681
682 if (copy_from_user(&cmd, buf, sizeof cmd))
683 return -EFAULT;
684
685 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
686 if (!uobj)
687 return -EINVAL;
688
689 mr = uobj->object;
690
691 ret = ib_dereg_mr(mr);
692 if (!ret)
693 uobj->live = 0;
694
695 put_uobj_write(uobj);
696
697 if (ret)
698 return ret;
699
700 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
701
702 mutex_lock(&file->mutex);
703 list_del(&uobj->list);
704 mutex_unlock(&file->mutex);
705
706 put_uobj(uobj);
707
708 return in_len;
709 }
710
711 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
712 const char __user *buf, int in_len,
713 int out_len)
714 {
715 struct ib_uverbs_create_comp_channel cmd;
716 struct ib_uverbs_create_comp_channel_resp resp;
717 struct file *filp;
718
719 if (out_len < sizeof resp)
720 return -ENOSPC;
721
722 if (copy_from_user(&cmd, buf, sizeof cmd))
723 return -EFAULT;
724
725 filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
726 if (IS_ERR(filp))
727 return PTR_ERR(filp);
728
729 if (copy_to_user((void __user *) (unsigned long) cmd.response,
730 &resp, sizeof resp)) {
731 put_unused_fd(resp.fd);
732 fput(filp);
733 return -EFAULT;
734 }
735
736 fd_install(resp.fd, filp);
737 return in_len;
738 }
739
740 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
741 const char __user *buf, int in_len,
742 int out_len)
743 {
744 struct ib_uverbs_create_cq cmd;
745 struct ib_uverbs_create_cq_resp resp;
746 struct ib_udata udata;
747 struct ib_ucq_object *obj;
748 struct ib_uverbs_event_file *ev_file = NULL;
749 struct ib_cq *cq;
750 int ret;
751
752 if (out_len < sizeof resp)
753 return -ENOSPC;
754
755 if (copy_from_user(&cmd, buf, sizeof cmd))
756 return -EFAULT;
757
758 INIT_UDATA(&udata, buf + sizeof cmd,
759 (unsigned long) cmd.response + sizeof resp,
760 in_len - sizeof cmd, out_len - sizeof resp);
761
762 if (cmd.comp_vector >= file->device->num_comp_vectors)
763 return -EINVAL;
764
765 obj = kmalloc(sizeof *obj, GFP_KERNEL);
766 if (!obj)
767 return -ENOMEM;
768
769 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
770 down_write(&obj->uobject.mutex);
771
772 if (cmd.comp_channel >= 0) {
773 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
774 if (!ev_file) {
775 ret = -EINVAL;
776 goto err;
777 }
778 }
779
780 obj->uverbs_file = file;
781 obj->comp_events_reported = 0;
782 obj->async_events_reported = 0;
783 INIT_LIST_HEAD(&obj->comp_list);
784 INIT_LIST_HEAD(&obj->async_list);
785
786 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
787 cmd.comp_vector,
788 file->ucontext, &udata);
789 if (IS_ERR(cq)) {
790 ret = PTR_ERR(cq);
791 goto err_file;
792 }
793
794 cq->device = file->device->ib_dev;
795 cq->uobject = &obj->uobject;
796 cq->comp_handler = ib_uverbs_comp_handler;
797 cq->event_handler = ib_uverbs_cq_event_handler;
798 cq->cq_context = ev_file;
799 atomic_set(&cq->usecnt, 0);
800
801 obj->uobject.object = cq;
802 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
803 if (ret)
804 goto err_free;
805
806 memset(&resp, 0, sizeof resp);
807 resp.cq_handle = obj->uobject.id;
808 resp.cqe = cq->cqe;
809
810 if (copy_to_user((void __user *) (unsigned long) cmd.response,
811 &resp, sizeof resp)) {
812 ret = -EFAULT;
813 goto err_copy;
814 }
815
816 mutex_lock(&file->mutex);
817 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
818 mutex_unlock(&file->mutex);
819
820 obj->uobject.live = 1;
821
822 up_write(&obj->uobject.mutex);
823
824 return in_len;
825
826 err_copy:
827 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
828
829 err_free:
830 ib_destroy_cq(cq);
831
832 err_file:
833 if (ev_file)
834 ib_uverbs_release_ucq(file, ev_file, obj);
835
836 err:
837 put_uobj_write(&obj->uobject);
838 return ret;
839 }
840
841 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
842 const char __user *buf, int in_len,
843 int out_len)
844 {
845 struct ib_uverbs_resize_cq cmd;
846 struct ib_uverbs_resize_cq_resp resp;
847 struct ib_udata udata;
848 struct ib_cq *cq;
849 int ret = -EINVAL;
850
851 if (copy_from_user(&cmd, buf, sizeof cmd))
852 return -EFAULT;
853
854 INIT_UDATA(&udata, buf + sizeof cmd,
855 (unsigned long) cmd.response + sizeof resp,
856 in_len - sizeof cmd, out_len - sizeof resp);
857
858 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
859 if (!cq)
860 return -EINVAL;
861
862 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
863 if (ret)
864 goto out;
865
866 resp.cqe = cq->cqe;
867
868 if (copy_to_user((void __user *) (unsigned long) cmd.response,
869 &resp, sizeof resp.cqe))
870 ret = -EFAULT;
871
872 out:
873 put_cq_read(cq);
874
875 return ret ? ret : in_len;
876 }
877
878 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
879 const char __user *buf, int in_len,
880 int out_len)
881 {
882 struct ib_uverbs_poll_cq cmd;
883 struct ib_uverbs_poll_cq_resp *resp;
884 struct ib_cq *cq;
885 struct ib_wc *wc;
886 int ret = 0;
887 int i;
888 int rsize;
889
890 if (copy_from_user(&cmd, buf, sizeof cmd))
891 return -EFAULT;
892
893 wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
894 if (!wc)
895 return -ENOMEM;
896
897 rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
898 resp = kmalloc(rsize, GFP_KERNEL);
899 if (!resp) {
900 ret = -ENOMEM;
901 goto out_wc;
902 }
903
904 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
905 if (!cq) {
906 ret = -EINVAL;
907 goto out;
908 }
909
910 resp->count = ib_poll_cq(cq, cmd.ne, wc);
911
912 put_cq_read(cq);
913
914 for (i = 0; i < resp->count; i++) {
915 resp->wc[i].wr_id = wc[i].wr_id;
916 resp->wc[i].status = wc[i].status;
917 resp->wc[i].opcode = wc[i].opcode;
918 resp->wc[i].vendor_err = wc[i].vendor_err;
919 resp->wc[i].byte_len = wc[i].byte_len;
920 resp->wc[i].ex.imm_data = (__u32 __force) wc[i].ex.imm_data;
921 resp->wc[i].qp_num = wc[i].qp->qp_num;
922 resp->wc[i].src_qp = wc[i].src_qp;
923 resp->wc[i].wc_flags = wc[i].wc_flags;
924 resp->wc[i].pkey_index = wc[i].pkey_index;
925 resp->wc[i].slid = wc[i].slid;
926 resp->wc[i].sl = wc[i].sl;
927 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
928 resp->wc[i].port_num = wc[i].port_num;
929 }
930
931 if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
932 ret = -EFAULT;
933
934 out:
935 kfree(resp);
936
937 out_wc:
938 kfree(wc);
939 return ret ? ret : in_len;
940 }
941
942 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
943 const char __user *buf, int in_len,
944 int out_len)
945 {
946 struct ib_uverbs_req_notify_cq cmd;
947 struct ib_cq *cq;
948
949 if (copy_from_user(&cmd, buf, sizeof cmd))
950 return -EFAULT;
951
952 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
953 if (!cq)
954 return -EINVAL;
955
956 ib_req_notify_cq(cq, cmd.solicited_only ?
957 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
958
959 put_cq_read(cq);
960
961 return in_len;
962 }
963
964 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
965 const char __user *buf, int in_len,
966 int out_len)
967 {
968 struct ib_uverbs_destroy_cq cmd;
969 struct ib_uverbs_destroy_cq_resp resp;
970 struct ib_uobject *uobj;
971 struct ib_cq *cq;
972 struct ib_ucq_object *obj;
973 struct ib_uverbs_event_file *ev_file;
974 int ret = -EINVAL;
975
976 if (copy_from_user(&cmd, buf, sizeof cmd))
977 return -EFAULT;
978
979 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
980 if (!uobj)
981 return -EINVAL;
982 cq = uobj->object;
983 ev_file = cq->cq_context;
984 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
985
986 ret = ib_destroy_cq(cq);
987 if (!ret)
988 uobj->live = 0;
989
990 put_uobj_write(uobj);
991
992 if (ret)
993 return ret;
994
995 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
996
997 mutex_lock(&file->mutex);
998 list_del(&uobj->list);
999 mutex_unlock(&file->mutex);
1000
1001 ib_uverbs_release_ucq(file, ev_file, obj);
1002
1003 memset(&resp, 0, sizeof resp);
1004 resp.comp_events_reported = obj->comp_events_reported;
1005 resp.async_events_reported = obj->async_events_reported;
1006
1007 put_uobj(uobj);
1008
1009 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1010 &resp, sizeof resp))
1011 return -EFAULT;
1012
1013 return in_len;
1014 }
1015
1016 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1017 const char __user *buf, int in_len,
1018 int out_len)
1019 {
1020 struct ib_uverbs_create_qp cmd;
1021 struct ib_uverbs_create_qp_resp resp;
1022 struct ib_udata udata;
1023 struct ib_uqp_object *obj;
1024 struct ib_pd *pd;
1025 struct ib_cq *scq, *rcq;
1026 struct ib_srq *srq;
1027 struct ib_qp *qp;
1028 struct ib_qp_init_attr attr;
1029 int ret;
1030
1031 if (out_len < sizeof resp)
1032 return -ENOSPC;
1033
1034 if (copy_from_user(&cmd, buf, sizeof cmd))
1035 return -EFAULT;
1036
1037 INIT_UDATA(&udata, buf + sizeof cmd,
1038 (unsigned long) cmd.response + sizeof resp,
1039 in_len - sizeof cmd, out_len - sizeof resp);
1040
1041 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1042 if (!obj)
1043 return -ENOMEM;
1044
1045 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1046 down_write(&obj->uevent.uobject.mutex);
1047
1048 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1049 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1050 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1051 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1052 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1053
1054 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1055 ret = -EINVAL;
1056 goto err_put;
1057 }
1058
1059 attr.event_handler = ib_uverbs_qp_event_handler;
1060 attr.qp_context = file;
1061 attr.send_cq = scq;
1062 attr.recv_cq = rcq;
1063 attr.srq = srq;
1064 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1065 attr.qp_type = cmd.qp_type;
1066 attr.create_flags = 0;
1067
1068 attr.cap.max_send_wr = cmd.max_send_wr;
1069 attr.cap.max_recv_wr = cmd.max_recv_wr;
1070 attr.cap.max_send_sge = cmd.max_send_sge;
1071 attr.cap.max_recv_sge = cmd.max_recv_sge;
1072 attr.cap.max_inline_data = cmd.max_inline_data;
1073
1074 obj->uevent.events_reported = 0;
1075 INIT_LIST_HEAD(&obj->uevent.event_list);
1076 INIT_LIST_HEAD(&obj->mcast_list);
1077
1078 qp = pd->device->create_qp(pd, &attr, &udata);
1079 if (IS_ERR(qp)) {
1080 ret = PTR_ERR(qp);
1081 goto err_put;
1082 }
1083
1084 qp->device = pd->device;
1085 qp->pd = pd;
1086 qp->send_cq = attr.send_cq;
1087 qp->recv_cq = attr.recv_cq;
1088 qp->srq = attr.srq;
1089 qp->uobject = &obj->uevent.uobject;
1090 qp->event_handler = attr.event_handler;
1091 qp->qp_context = attr.qp_context;
1092 qp->qp_type = attr.qp_type;
1093 atomic_inc(&pd->usecnt);
1094 atomic_inc(&attr.send_cq->usecnt);
1095 atomic_inc(&attr.recv_cq->usecnt);
1096 if (attr.srq)
1097 atomic_inc(&attr.srq->usecnt);
1098
1099 obj->uevent.uobject.object = qp;
1100 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1101 if (ret)
1102 goto err_destroy;
1103
1104 memset(&resp, 0, sizeof resp);
1105 resp.qpn = qp->qp_num;
1106 resp.qp_handle = obj->uevent.uobject.id;
1107 resp.max_recv_sge = attr.cap.max_recv_sge;
1108 resp.max_send_sge = attr.cap.max_send_sge;
1109 resp.max_recv_wr = attr.cap.max_recv_wr;
1110 resp.max_send_wr = attr.cap.max_send_wr;
1111 resp.max_inline_data = attr.cap.max_inline_data;
1112
1113 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1114 &resp, sizeof resp)) {
1115 ret = -EFAULT;
1116 goto err_copy;
1117 }
1118
1119 put_pd_read(pd);
1120 put_cq_read(scq);
1121 if (rcq != scq)
1122 put_cq_read(rcq);
1123 if (srq)
1124 put_srq_read(srq);
1125
1126 mutex_lock(&file->mutex);
1127 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1128 mutex_unlock(&file->mutex);
1129
1130 obj->uevent.uobject.live = 1;
1131
1132 up_write(&obj->uevent.uobject.mutex);
1133
1134 return in_len;
1135
1136 err_copy:
1137 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1138
1139 err_destroy:
1140 ib_destroy_qp(qp);
1141
1142 err_put:
1143 if (pd)
1144 put_pd_read(pd);
1145 if (scq)
1146 put_cq_read(scq);
1147 if (rcq && rcq != scq)
1148 put_cq_read(rcq);
1149 if (srq)
1150 put_srq_read(srq);
1151
1152 put_uobj_write(&obj->uevent.uobject);
1153 return ret;
1154 }
1155
1156 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1157 const char __user *buf, int in_len,
1158 int out_len)
1159 {
1160 struct ib_uverbs_query_qp cmd;
1161 struct ib_uverbs_query_qp_resp resp;
1162 struct ib_qp *qp;
1163 struct ib_qp_attr *attr;
1164 struct ib_qp_init_attr *init_attr;
1165 int ret;
1166
1167 if (copy_from_user(&cmd, buf, sizeof cmd))
1168 return -EFAULT;
1169
1170 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1171 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1172 if (!attr || !init_attr) {
1173 ret = -ENOMEM;
1174 goto out;
1175 }
1176
1177 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1178 if (!qp) {
1179 ret = -EINVAL;
1180 goto out;
1181 }
1182
1183 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1184
1185 put_qp_read(qp);
1186
1187 if (ret)
1188 goto out;
1189
1190 memset(&resp, 0, sizeof resp);
1191
1192 resp.qp_state = attr->qp_state;
1193 resp.cur_qp_state = attr->cur_qp_state;
1194 resp.path_mtu = attr->path_mtu;
1195 resp.path_mig_state = attr->path_mig_state;
1196 resp.qkey = attr->qkey;
1197 resp.rq_psn = attr->rq_psn;
1198 resp.sq_psn = attr->sq_psn;
1199 resp.dest_qp_num = attr->dest_qp_num;
1200 resp.qp_access_flags = attr->qp_access_flags;
1201 resp.pkey_index = attr->pkey_index;
1202 resp.alt_pkey_index = attr->alt_pkey_index;
1203 resp.sq_draining = attr->sq_draining;
1204 resp.max_rd_atomic = attr->max_rd_atomic;
1205 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1206 resp.min_rnr_timer = attr->min_rnr_timer;
1207 resp.port_num = attr->port_num;
1208 resp.timeout = attr->timeout;
1209 resp.retry_cnt = attr->retry_cnt;
1210 resp.rnr_retry = attr->rnr_retry;
1211 resp.alt_port_num = attr->alt_port_num;
1212 resp.alt_timeout = attr->alt_timeout;
1213
1214 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1215 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1216 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1217 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1218 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1219 resp.dest.dlid = attr->ah_attr.dlid;
1220 resp.dest.sl = attr->ah_attr.sl;
1221 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1222 resp.dest.static_rate = attr->ah_attr.static_rate;
1223 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1224 resp.dest.port_num = attr->ah_attr.port_num;
1225
1226 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1227 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1228 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1229 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1230 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1231 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1232 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1233 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1234 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1235 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1236 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1237
1238 resp.max_send_wr = init_attr->cap.max_send_wr;
1239 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1240 resp.max_send_sge = init_attr->cap.max_send_sge;
1241 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1242 resp.max_inline_data = init_attr->cap.max_inline_data;
1243 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1244
1245 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1246 &resp, sizeof resp))
1247 ret = -EFAULT;
1248
1249 out:
1250 kfree(attr);
1251 kfree(init_attr);
1252
1253 return ret ? ret : in_len;
1254 }
1255
1256 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1257 const char __user *buf, int in_len,
1258 int out_len)
1259 {
1260 struct ib_uverbs_modify_qp cmd;
1261 struct ib_udata udata;
1262 struct ib_qp *qp;
1263 struct ib_qp_attr *attr;
1264 int ret;
1265
1266 if (copy_from_user(&cmd, buf, sizeof cmd))
1267 return -EFAULT;
1268
1269 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1270 out_len);
1271
1272 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1273 if (!attr)
1274 return -ENOMEM;
1275
1276 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1277 if (!qp) {
1278 ret = -EINVAL;
1279 goto out;
1280 }
1281
1282 attr->qp_state = cmd.qp_state;
1283 attr->cur_qp_state = cmd.cur_qp_state;
1284 attr->path_mtu = cmd.path_mtu;
1285 attr->path_mig_state = cmd.path_mig_state;
1286 attr->qkey = cmd.qkey;
1287 attr->rq_psn = cmd.rq_psn;
1288 attr->sq_psn = cmd.sq_psn;
1289 attr->dest_qp_num = cmd.dest_qp_num;
1290 attr->qp_access_flags = cmd.qp_access_flags;
1291 attr->pkey_index = cmd.pkey_index;
1292 attr->alt_pkey_index = cmd.alt_pkey_index;
1293 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1294 attr->max_rd_atomic = cmd.max_rd_atomic;
1295 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1296 attr->min_rnr_timer = cmd.min_rnr_timer;
1297 attr->port_num = cmd.port_num;
1298 attr->timeout = cmd.timeout;
1299 attr->retry_cnt = cmd.retry_cnt;
1300 attr->rnr_retry = cmd.rnr_retry;
1301 attr->alt_port_num = cmd.alt_port_num;
1302 attr->alt_timeout = cmd.alt_timeout;
1303
1304 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1305 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1306 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1307 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1308 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1309 attr->ah_attr.dlid = cmd.dest.dlid;
1310 attr->ah_attr.sl = cmd.dest.sl;
1311 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1312 attr->ah_attr.static_rate = cmd.dest.static_rate;
1313 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1314 attr->ah_attr.port_num = cmd.dest.port_num;
1315
1316 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1317 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1318 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1319 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1320 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1321 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1322 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1323 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1324 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1325 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1326 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1327
1328 ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1329
1330 put_qp_read(qp);
1331
1332 if (ret)
1333 goto out;
1334
1335 ret = in_len;
1336
1337 out:
1338 kfree(attr);
1339
1340 return ret;
1341 }
1342
1343 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1344 const char __user *buf, int in_len,
1345 int out_len)
1346 {
1347 struct ib_uverbs_destroy_qp cmd;
1348 struct ib_uverbs_destroy_qp_resp resp;
1349 struct ib_uobject *uobj;
1350 struct ib_qp *qp;
1351 struct ib_uqp_object *obj;
1352 int ret = -EINVAL;
1353
1354 if (copy_from_user(&cmd, buf, sizeof cmd))
1355 return -EFAULT;
1356
1357 memset(&resp, 0, sizeof resp);
1358
1359 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1360 if (!uobj)
1361 return -EINVAL;
1362 qp = uobj->object;
1363 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1364
1365 if (!list_empty(&obj->mcast_list)) {
1366 put_uobj_write(uobj);
1367 return -EBUSY;
1368 }
1369
1370 ret = ib_destroy_qp(qp);
1371 if (!ret)
1372 uobj->live = 0;
1373
1374 put_uobj_write(uobj);
1375
1376 if (ret)
1377 return ret;
1378
1379 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1380
1381 mutex_lock(&file->mutex);
1382 list_del(&uobj->list);
1383 mutex_unlock(&file->mutex);
1384
1385 ib_uverbs_release_uevent(file, &obj->uevent);
1386
1387 resp.events_reported = obj->uevent.events_reported;
1388
1389 put_uobj(uobj);
1390
1391 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1392 &resp, sizeof resp))
1393 return -EFAULT;
1394
1395 return in_len;
1396 }
1397
1398 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1399 const char __user *buf, int in_len,
1400 int out_len)
1401 {
1402 struct ib_uverbs_post_send cmd;
1403 struct ib_uverbs_post_send_resp resp;
1404 struct ib_uverbs_send_wr *user_wr;
1405 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1406 struct ib_qp *qp;
1407 int i, sg_ind;
1408 int is_ud;
1409 ssize_t ret = -EINVAL;
1410
1411 if (copy_from_user(&cmd, buf, sizeof cmd))
1412 return -EFAULT;
1413
1414 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1415 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1416 return -EINVAL;
1417
1418 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1419 return -EINVAL;
1420
1421 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1422 if (!user_wr)
1423 return -ENOMEM;
1424
1425 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1426 if (!qp)
1427 goto out;
1428
1429 is_ud = qp->qp_type == IB_QPT_UD;
1430 sg_ind = 0;
1431 last = NULL;
1432 for (i = 0; i < cmd.wr_count; ++i) {
1433 if (copy_from_user(user_wr,
1434 buf + sizeof cmd + i * cmd.wqe_size,
1435 cmd.wqe_size)) {
1436 ret = -EFAULT;
1437 goto out_put;
1438 }
1439
1440 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1441 ret = -EINVAL;
1442 goto out_put;
1443 }
1444
1445 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1446 user_wr->num_sge * sizeof (struct ib_sge),
1447 GFP_KERNEL);
1448 if (!next) {
1449 ret = -ENOMEM;
1450 goto out_put;
1451 }
1452
1453 if (!last)
1454 wr = next;
1455 else
1456 last->next = next;
1457 last = next;
1458
1459 next->next = NULL;
1460 next->wr_id = user_wr->wr_id;
1461 next->num_sge = user_wr->num_sge;
1462 next->opcode = user_wr->opcode;
1463 next->send_flags = user_wr->send_flags;
1464
1465 if (is_ud) {
1466 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1467 file->ucontext);
1468 if (!next->wr.ud.ah) {
1469 ret = -EINVAL;
1470 goto out_put;
1471 }
1472 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1473 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1474 } else {
1475 switch (next->opcode) {
1476 case IB_WR_RDMA_WRITE_WITH_IMM:
1477 next->ex.imm_data =
1478 (__be32 __force) user_wr->ex.imm_data;
1479 case IB_WR_RDMA_WRITE:
1480 case IB_WR_RDMA_READ:
1481 next->wr.rdma.remote_addr =
1482 user_wr->wr.rdma.remote_addr;
1483 next->wr.rdma.rkey =
1484 user_wr->wr.rdma.rkey;
1485 break;
1486 case IB_WR_SEND_WITH_IMM:
1487 next->ex.imm_data =
1488 (__be32 __force) user_wr->ex.imm_data;
1489 break;
1490 case IB_WR_SEND_WITH_INV:
1491 next->ex.invalidate_rkey =
1492 user_wr->ex.invalidate_rkey;
1493 break;
1494 case IB_WR_ATOMIC_CMP_AND_SWP:
1495 case IB_WR_ATOMIC_FETCH_AND_ADD:
1496 next->wr.atomic.remote_addr =
1497 user_wr->wr.atomic.remote_addr;
1498 next->wr.atomic.compare_add =
1499 user_wr->wr.atomic.compare_add;
1500 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1501 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1502 break;
1503 default:
1504 break;
1505 }
1506 }
1507
1508 if (next->num_sge) {
1509 next->sg_list = (void *) next +
1510 ALIGN(sizeof *next, sizeof (struct ib_sge));
1511 if (copy_from_user(next->sg_list,
1512 buf + sizeof cmd +
1513 cmd.wr_count * cmd.wqe_size +
1514 sg_ind * sizeof (struct ib_sge),
1515 next->num_sge * sizeof (struct ib_sge))) {
1516 ret = -EFAULT;
1517 goto out_put;
1518 }
1519 sg_ind += next->num_sge;
1520 } else
1521 next->sg_list = NULL;
1522 }
1523
1524 resp.bad_wr = 0;
1525 ret = qp->device->post_send(qp, wr, &bad_wr);
1526 if (ret)
1527 for (next = wr; next; next = next->next) {
1528 ++resp.bad_wr;
1529 if (next == bad_wr)
1530 break;
1531 }
1532
1533 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1534 &resp, sizeof resp))
1535 ret = -EFAULT;
1536
1537 out_put:
1538 put_qp_read(qp);
1539
1540 while (wr) {
1541 if (is_ud && wr->wr.ud.ah)
1542 put_ah_read(wr->wr.ud.ah);
1543 next = wr->next;
1544 kfree(wr);
1545 wr = next;
1546 }
1547
1548 out:
1549 kfree(user_wr);
1550
1551 return ret ? ret : in_len;
1552 }
1553
1554 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1555 int in_len,
1556 u32 wr_count,
1557 u32 sge_count,
1558 u32 wqe_size)
1559 {
1560 struct ib_uverbs_recv_wr *user_wr;
1561 struct ib_recv_wr *wr = NULL, *last, *next;
1562 int sg_ind;
1563 int i;
1564 int ret;
1565
1566 if (in_len < wqe_size * wr_count +
1567 sge_count * sizeof (struct ib_uverbs_sge))
1568 return ERR_PTR(-EINVAL);
1569
1570 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1571 return ERR_PTR(-EINVAL);
1572
1573 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1574 if (!user_wr)
1575 return ERR_PTR(-ENOMEM);
1576
1577 sg_ind = 0;
1578 last = NULL;
1579 for (i = 0; i < wr_count; ++i) {
1580 if (copy_from_user(user_wr, buf + i * wqe_size,
1581 wqe_size)) {
1582 ret = -EFAULT;
1583 goto err;
1584 }
1585
1586 if (user_wr->num_sge + sg_ind > sge_count) {
1587 ret = -EINVAL;
1588 goto err;
1589 }
1590
1591 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1592 user_wr->num_sge * sizeof (struct ib_sge),
1593 GFP_KERNEL);
1594 if (!next) {
1595 ret = -ENOMEM;
1596 goto err;
1597 }
1598
1599 if (!last)
1600 wr = next;
1601 else
1602 last->next = next;
1603 last = next;
1604
1605 next->next = NULL;
1606 next->wr_id = user_wr->wr_id;
1607 next->num_sge = user_wr->num_sge;
1608
1609 if (next->num_sge) {
1610 next->sg_list = (void *) next +
1611 ALIGN(sizeof *next, sizeof (struct ib_sge));
1612 if (copy_from_user(next->sg_list,
1613 buf + wr_count * wqe_size +
1614 sg_ind * sizeof (struct ib_sge),
1615 next->num_sge * sizeof (struct ib_sge))) {
1616 ret = -EFAULT;
1617 goto err;
1618 }
1619 sg_ind += next->num_sge;
1620 } else
1621 next->sg_list = NULL;
1622 }
1623
1624 kfree(user_wr);
1625 return wr;
1626
1627 err:
1628 kfree(user_wr);
1629
1630 while (wr) {
1631 next = wr->next;
1632 kfree(wr);
1633 wr = next;
1634 }
1635
1636 return ERR_PTR(ret);
1637 }
1638
1639 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1640 const char __user *buf, int in_len,
1641 int out_len)
1642 {
1643 struct ib_uverbs_post_recv cmd;
1644 struct ib_uverbs_post_recv_resp resp;
1645 struct ib_recv_wr *wr, *next, *bad_wr;
1646 struct ib_qp *qp;
1647 ssize_t ret = -EINVAL;
1648
1649 if (copy_from_user(&cmd, buf, sizeof cmd))
1650 return -EFAULT;
1651
1652 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1653 in_len - sizeof cmd, cmd.wr_count,
1654 cmd.sge_count, cmd.wqe_size);
1655 if (IS_ERR(wr))
1656 return PTR_ERR(wr);
1657
1658 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1659 if (!qp)
1660 goto out;
1661
1662 resp.bad_wr = 0;
1663 ret = qp->device->post_recv(qp, wr, &bad_wr);
1664
1665 put_qp_read(qp);
1666
1667 if (ret)
1668 for (next = wr; next; next = next->next) {
1669 ++resp.bad_wr;
1670 if (next == bad_wr)
1671 break;
1672 }
1673
1674 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1675 &resp, sizeof resp))
1676 ret = -EFAULT;
1677
1678 out:
1679 while (wr) {
1680 next = wr->next;
1681 kfree(wr);
1682 wr = next;
1683 }
1684
1685 return ret ? ret : in_len;
1686 }
1687
1688 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1689 const char __user *buf, int in_len,
1690 int out_len)
1691 {
1692 struct ib_uverbs_post_srq_recv cmd;
1693 struct ib_uverbs_post_srq_recv_resp resp;
1694 struct ib_recv_wr *wr, *next, *bad_wr;
1695 struct ib_srq *srq;
1696 ssize_t ret = -EINVAL;
1697
1698 if (copy_from_user(&cmd, buf, sizeof cmd))
1699 return -EFAULT;
1700
1701 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1702 in_len - sizeof cmd, cmd.wr_count,
1703 cmd.sge_count, cmd.wqe_size);
1704 if (IS_ERR(wr))
1705 return PTR_ERR(wr);
1706
1707 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1708 if (!srq)
1709 goto out;
1710
1711 resp.bad_wr = 0;
1712 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1713
1714 put_srq_read(srq);
1715
1716 if (ret)
1717 for (next = wr; next; next = next->next) {
1718 ++resp.bad_wr;
1719 if (next == bad_wr)
1720 break;
1721 }
1722
1723 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1724 &resp, sizeof resp))
1725 ret = -EFAULT;
1726
1727 out:
1728 while (wr) {
1729 next = wr->next;
1730 kfree(wr);
1731 wr = next;
1732 }
1733
1734 return ret ? ret : in_len;
1735 }
1736
1737 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1738 const char __user *buf, int in_len,
1739 int out_len)
1740 {
1741 struct ib_uverbs_create_ah cmd;
1742 struct ib_uverbs_create_ah_resp resp;
1743 struct ib_uobject *uobj;
1744 struct ib_pd *pd;
1745 struct ib_ah *ah;
1746 struct ib_ah_attr attr;
1747 int ret;
1748
1749 if (out_len < sizeof resp)
1750 return -ENOSPC;
1751
1752 if (copy_from_user(&cmd, buf, sizeof cmd))
1753 return -EFAULT;
1754
1755 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1756 if (!uobj)
1757 return -ENOMEM;
1758
1759 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1760 down_write(&uobj->mutex);
1761
1762 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1763 if (!pd) {
1764 ret = -EINVAL;
1765 goto err;
1766 }
1767
1768 attr.dlid = cmd.attr.dlid;
1769 attr.sl = cmd.attr.sl;
1770 attr.src_path_bits = cmd.attr.src_path_bits;
1771 attr.static_rate = cmd.attr.static_rate;
1772 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
1773 attr.port_num = cmd.attr.port_num;
1774 attr.grh.flow_label = cmd.attr.grh.flow_label;
1775 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1776 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1777 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1778 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1779
1780 ah = ib_create_ah(pd, &attr);
1781 if (IS_ERR(ah)) {
1782 ret = PTR_ERR(ah);
1783 goto err_put;
1784 }
1785
1786 ah->uobject = uobj;
1787 uobj->object = ah;
1788
1789 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1790 if (ret)
1791 goto err_destroy;
1792
1793 resp.ah_handle = uobj->id;
1794
1795 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1796 &resp, sizeof resp)) {
1797 ret = -EFAULT;
1798 goto err_copy;
1799 }
1800
1801 put_pd_read(pd);
1802
1803 mutex_lock(&file->mutex);
1804 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1805 mutex_unlock(&file->mutex);
1806
1807 uobj->live = 1;
1808
1809 up_write(&uobj->mutex);
1810
1811 return in_len;
1812
1813 err_copy:
1814 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1815
1816 err_destroy:
1817 ib_destroy_ah(ah);
1818
1819 err_put:
1820 put_pd_read(pd);
1821
1822 err:
1823 put_uobj_write(uobj);
1824 return ret;
1825 }
1826
1827 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1828 const char __user *buf, int in_len, int out_len)
1829 {
1830 struct ib_uverbs_destroy_ah cmd;
1831 struct ib_ah *ah;
1832 struct ib_uobject *uobj;
1833 int ret;
1834
1835 if (copy_from_user(&cmd, buf, sizeof cmd))
1836 return -EFAULT;
1837
1838 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1839 if (!uobj)
1840 return -EINVAL;
1841 ah = uobj->object;
1842
1843 ret = ib_destroy_ah(ah);
1844 if (!ret)
1845 uobj->live = 0;
1846
1847 put_uobj_write(uobj);
1848
1849 if (ret)
1850 return ret;
1851
1852 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1853
1854 mutex_lock(&file->mutex);
1855 list_del(&uobj->list);
1856 mutex_unlock(&file->mutex);
1857
1858 put_uobj(uobj);
1859
1860 return in_len;
1861 }
1862
1863 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1864 const char __user *buf, int in_len,
1865 int out_len)
1866 {
1867 struct ib_uverbs_attach_mcast cmd;
1868 struct ib_qp *qp;
1869 struct ib_uqp_object *obj;
1870 struct ib_uverbs_mcast_entry *mcast;
1871 int ret;
1872
1873 if (copy_from_user(&cmd, buf, sizeof cmd))
1874 return -EFAULT;
1875
1876 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1877 if (!qp)
1878 return -EINVAL;
1879
1880 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1881
1882 list_for_each_entry(mcast, &obj->mcast_list, list)
1883 if (cmd.mlid == mcast->lid &&
1884 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1885 ret = 0;
1886 goto out_put;
1887 }
1888
1889 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1890 if (!mcast) {
1891 ret = -ENOMEM;
1892 goto out_put;
1893 }
1894
1895 mcast->lid = cmd.mlid;
1896 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1897
1898 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1899 if (!ret)
1900 list_add_tail(&mcast->list, &obj->mcast_list);
1901 else
1902 kfree(mcast);
1903
1904 out_put:
1905 put_qp_read(qp);
1906
1907 return ret ? ret : in_len;
1908 }
1909
1910 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1911 const char __user *buf, int in_len,
1912 int out_len)
1913 {
1914 struct ib_uverbs_detach_mcast cmd;
1915 struct ib_uqp_object *obj;
1916 struct ib_qp *qp;
1917 struct ib_uverbs_mcast_entry *mcast;
1918 int ret = -EINVAL;
1919
1920 if (copy_from_user(&cmd, buf, sizeof cmd))
1921 return -EFAULT;
1922
1923 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1924 if (!qp)
1925 return -EINVAL;
1926
1927 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1928 if (ret)
1929 goto out_put;
1930
1931 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1932
1933 list_for_each_entry(mcast, &obj->mcast_list, list)
1934 if (cmd.mlid == mcast->lid &&
1935 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1936 list_del(&mcast->list);
1937 kfree(mcast);
1938 break;
1939 }
1940
1941 out_put:
1942 put_qp_read(qp);
1943
1944 return ret ? ret : in_len;
1945 }
1946
1947 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1948 const char __user *buf, int in_len,
1949 int out_len)
1950 {
1951 struct ib_uverbs_create_srq cmd;
1952 struct ib_uverbs_create_srq_resp resp;
1953 struct ib_udata udata;
1954 struct ib_uevent_object *obj;
1955 struct ib_pd *pd;
1956 struct ib_srq *srq;
1957 struct ib_srq_init_attr attr;
1958 int ret;
1959
1960 if (out_len < sizeof resp)
1961 return -ENOSPC;
1962
1963 if (copy_from_user(&cmd, buf, sizeof cmd))
1964 return -EFAULT;
1965
1966 INIT_UDATA(&udata, buf + sizeof cmd,
1967 (unsigned long) cmd.response + sizeof resp,
1968 in_len - sizeof cmd, out_len - sizeof resp);
1969
1970 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1971 if (!obj)
1972 return -ENOMEM;
1973
1974 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1975 down_write(&obj->uobject.mutex);
1976
1977 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1978 if (!pd) {
1979 ret = -EINVAL;
1980 goto err;
1981 }
1982
1983 attr.event_handler = ib_uverbs_srq_event_handler;
1984 attr.srq_context = file;
1985 attr.attr.max_wr = cmd.max_wr;
1986 attr.attr.max_sge = cmd.max_sge;
1987 attr.attr.srq_limit = cmd.srq_limit;
1988
1989 obj->events_reported = 0;
1990 INIT_LIST_HEAD(&obj->event_list);
1991
1992 srq = pd->device->create_srq(pd, &attr, &udata);
1993 if (IS_ERR(srq)) {
1994 ret = PTR_ERR(srq);
1995 goto err_put;
1996 }
1997
1998 srq->device = pd->device;
1999 srq->pd = pd;
2000 srq->uobject = &obj->uobject;
2001 srq->event_handler = attr.event_handler;
2002 srq->srq_context = attr.srq_context;
2003 atomic_inc(&pd->usecnt);
2004 atomic_set(&srq->usecnt, 0);
2005
2006 obj->uobject.object = srq;
2007 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2008 if (ret)
2009 goto err_destroy;
2010
2011 memset(&resp, 0, sizeof resp);
2012 resp.srq_handle = obj->uobject.id;
2013 resp.max_wr = attr.attr.max_wr;
2014 resp.max_sge = attr.attr.max_sge;
2015
2016 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2017 &resp, sizeof resp)) {
2018 ret = -EFAULT;
2019 goto err_copy;
2020 }
2021
2022 put_pd_read(pd);
2023
2024 mutex_lock(&file->mutex);
2025 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2026 mutex_unlock(&file->mutex);
2027
2028 obj->uobject.live = 1;
2029
2030 up_write(&obj->uobject.mutex);
2031
2032 return in_len;
2033
2034 err_copy:
2035 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2036
2037 err_destroy:
2038 ib_destroy_srq(srq);
2039
2040 err_put:
2041 put_pd_read(pd);
2042
2043 err:
2044 put_uobj_write(&obj->uobject);
2045 return ret;
2046 }
2047
2048 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2049 const char __user *buf, int in_len,
2050 int out_len)
2051 {
2052 struct ib_uverbs_modify_srq cmd;
2053 struct ib_udata udata;
2054 struct ib_srq *srq;
2055 struct ib_srq_attr attr;
2056 int ret;
2057
2058 if (copy_from_user(&cmd, buf, sizeof cmd))
2059 return -EFAULT;
2060
2061 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2062 out_len);
2063
2064 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2065 if (!srq)
2066 return -EINVAL;
2067
2068 attr.max_wr = cmd.max_wr;
2069 attr.srq_limit = cmd.srq_limit;
2070
2071 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2072
2073 put_srq_read(srq);
2074
2075 return ret ? ret : in_len;
2076 }
2077
2078 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2079 const char __user *buf,
2080 int in_len, int out_len)
2081 {
2082 struct ib_uverbs_query_srq cmd;
2083 struct ib_uverbs_query_srq_resp resp;
2084 struct ib_srq_attr attr;
2085 struct ib_srq *srq;
2086 int ret;
2087
2088 if (out_len < sizeof resp)
2089 return -ENOSPC;
2090
2091 if (copy_from_user(&cmd, buf, sizeof cmd))
2092 return -EFAULT;
2093
2094 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2095 if (!srq)
2096 return -EINVAL;
2097
2098 ret = ib_query_srq(srq, &attr);
2099
2100 put_srq_read(srq);
2101
2102 if (ret)
2103 return ret;
2104
2105 memset(&resp, 0, sizeof resp);
2106
2107 resp.max_wr = attr.max_wr;
2108 resp.max_sge = attr.max_sge;
2109 resp.srq_limit = attr.srq_limit;
2110
2111 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2112 &resp, sizeof resp))
2113 return -EFAULT;
2114
2115 return in_len;
2116 }
2117
2118 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2119 const char __user *buf, int in_len,
2120 int out_len)
2121 {
2122 struct ib_uverbs_destroy_srq cmd;
2123 struct ib_uverbs_destroy_srq_resp resp;
2124 struct ib_uobject *uobj;
2125 struct ib_srq *srq;
2126 struct ib_uevent_object *obj;
2127 int ret = -EINVAL;
2128
2129 if (copy_from_user(&cmd, buf, sizeof cmd))
2130 return -EFAULT;
2131
2132 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2133 if (!uobj)
2134 return -EINVAL;
2135 srq = uobj->object;
2136 obj = container_of(uobj, struct ib_uevent_object, uobject);
2137
2138 ret = ib_destroy_srq(srq);
2139 if (!ret)
2140 uobj->live = 0;
2141
2142 put_uobj_write(uobj);
2143
2144 if (ret)
2145 return ret;
2146
2147 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2148
2149 mutex_lock(&file->mutex);
2150 list_del(&uobj->list);
2151 mutex_unlock(&file->mutex);
2152
2153 ib_uverbs_release_uevent(file, obj);
2154
2155 memset(&resp, 0, sizeof resp);
2156 resp.events_reported = obj->events_reported;
2157
2158 put_uobj(uobj);
2159
2160 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2161 &resp, sizeof resp))
2162 ret = -EFAULT;
2163
2164 return ret ? ret : in_len;
2165 }
2166
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