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This client driver allows you to use a GPIO pin as a source for PPS
[linux-2.6/next.git] / drivers / infiniband / core / uverbs_cmd.c
blobc42699285f8eb0d67745c359afadc6e125e7815d
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 #include <linux/slab.h>
39
40 #include <asm/uaccess.h>
41
42 #include "uverbs.h"
43
44 static struct lock_class_key pd_lock_key;
45 static struct lock_class_key mr_lock_key;
46 static struct lock_class_key cq_lock_key;
47 static struct lock_class_key qp_lock_key;
48 static struct lock_class_key ah_lock_key;
49 static struct lock_class_key srq_lock_key;
50
51 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
52 do { \
53 (udata)->inbuf = (void __user *) (ibuf); \
54 (udata)->outbuf = (void __user *) (obuf); \
55 (udata)->inlen = (ilen); \
56 (udata)->outlen = (olen); \
57 } while (0)
58
59 /*
60 * The ib_uobject locking scheme is as follows:
61 *
62 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
63 * needs to be held during all idr operations. When an object is
64 * looked up, a reference must be taken on the object's kref before
65 * dropping this lock.
66 *
67 * - Each object also has an rwsem. This rwsem must be held for
68 * reading while an operation that uses the object is performed.
69 * For example, while registering an MR, the associated PD's
70 * uobject.mutex must be held for reading. The rwsem must be held
71 * for writing while initializing or destroying an object.
72 *
73 * - In addition, each object has a "live" flag. If this flag is not
74 * set, then lookups of the object will fail even if it is found in
75 * the idr. This handles a reader that blocks and does not acquire
76 * the rwsem until after the object is destroyed. The destroy
77 * operation will set the live flag to 0 and then drop the rwsem;
78 * this will allow the reader to acquire the rwsem, see that the
79 * live flag is 0, and then drop the rwsem and its reference to
80 * object. The underlying storage will not be freed until the last
81 * reference to the object is dropped.
82 */
83
84 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
85 struct ib_ucontext *context, struct lock_class_key *key)
86 {
87 uobj->user_handle = user_handle;
88 uobj->context = context;
89 kref_init(&uobj->ref);
90 init_rwsem(&uobj->mutex);
91 lockdep_set_class(&uobj->mutex, key);
92 uobj->live = 0;
93 }
94
95 static void release_uobj(struct kref *kref)
96 {
97 kfree(container_of(kref, struct ib_uobject, ref));
98 }
99
100 static void put_uobj(struct ib_uobject *uobj)
101 {
102 kref_put(&uobj->ref, release_uobj);
103 }
104
105 static void put_uobj_read(struct ib_uobject *uobj)
106 {
107 up_read(&uobj->mutex);
108 put_uobj(uobj);
109 }
110
111 static void put_uobj_write(struct ib_uobject *uobj)
112 {
113 up_write(&uobj->mutex);
114 put_uobj(uobj);
115 }
116
117 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
118 {
119 int ret;
120
121 retry:
122 if (!idr_pre_get(idr, GFP_KERNEL))
123 return -ENOMEM;
124
125 spin_lock(&ib_uverbs_idr_lock);
126 ret = idr_get_new(idr, uobj, &uobj->id);
127 spin_unlock(&ib_uverbs_idr_lock);
128
129 if (ret == -EAGAIN)
130 goto retry;
131
132 return ret;
133 }
134
135 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
136 {
137 spin_lock(&ib_uverbs_idr_lock);
138 idr_remove(idr, uobj->id);
139 spin_unlock(&ib_uverbs_idr_lock);
140 }
141
142 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
143 struct ib_ucontext *context)
144 {
145 struct ib_uobject *uobj;
146
147 spin_lock(&ib_uverbs_idr_lock);
148 uobj = idr_find(idr, id);
149 if (uobj) {
150 if (uobj->context == context)
151 kref_get(&uobj->ref);
152 else
153 uobj = NULL;
154 }
155 spin_unlock(&ib_uverbs_idr_lock);
156
157 return uobj;
158 }
159
160 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
161 struct ib_ucontext *context, int nested)
162 {
163 struct ib_uobject *uobj;
164
165 uobj = __idr_get_uobj(idr, id, context);
166 if (!uobj)
167 return NULL;
168
169 if (nested)
170 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
171 else
172 down_read(&uobj->mutex);
173 if (!uobj->live) {
174 put_uobj_read(uobj);
175 return NULL;
176 }
177
178 return uobj;
179 }
180
181 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
182 struct ib_ucontext *context)
183 {
184 struct ib_uobject *uobj;
185
186 uobj = __idr_get_uobj(idr, id, context);
187 if (!uobj)
188 return NULL;
189
190 down_write(&uobj->mutex);
191 if (!uobj->live) {
192 put_uobj_write(uobj);
193 return NULL;
194 }
195
196 return uobj;
197 }
198
199 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
200 int nested)
201 {
202 struct ib_uobject *uobj;
203
204 uobj = idr_read_uobj(idr, id, context, nested);
205 return uobj ? uobj->object : NULL;
206 }
207
208 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
209 {
210 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
211 }
212
213 static void put_pd_read(struct ib_pd *pd)
214 {
215 put_uobj_read(pd->uobject);
216 }
217
218 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
219 {
220 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
221 }
222
223 static void put_cq_read(struct ib_cq *cq)
224 {
225 put_uobj_read(cq->uobject);
226 }
227
228 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
229 {
230 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
231 }
232
233 static void put_ah_read(struct ib_ah *ah)
234 {
235 put_uobj_read(ah->uobject);
236 }
237
238 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
239 {
240 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
241 }
242
243 static void put_qp_read(struct ib_qp *qp)
244 {
245 put_uobj_read(qp->uobject);
246 }
247
248 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
249 {
250 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
251 }
252
253 static void put_srq_read(struct ib_srq *srq)
254 {
255 put_uobj_read(srq->uobject);
256 }
257
258 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
259 const char __user *buf,
260 int in_len, int out_len)
261 {
262 struct ib_uverbs_get_context cmd;
263 struct ib_uverbs_get_context_resp resp;
264 struct ib_udata udata;
265 struct ib_device *ibdev = file->device->ib_dev;
266 struct ib_ucontext *ucontext;
267 struct file *filp;
268 int ret;
269
270 if (out_len < sizeof resp)
271 return -ENOSPC;
272
273 if (copy_from_user(&cmd, buf, sizeof cmd))
274 return -EFAULT;
275
276 mutex_lock(&file->mutex);
277
278 if (file->ucontext) {
279 ret = -EINVAL;
280 goto err;
281 }
282
283 INIT_UDATA(&udata, buf + sizeof cmd,
284 (unsigned long) cmd.response + sizeof resp,
285 in_len - sizeof cmd, out_len - sizeof resp);
286
287 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
288 if (IS_ERR(ucontext)) {
289 ret = PTR_ERR(ucontext);
290 goto err;
291 }
292
293 ucontext->device = ibdev;
294 INIT_LIST_HEAD(&ucontext->pd_list);
295 INIT_LIST_HEAD(&ucontext->mr_list);
296 INIT_LIST_HEAD(&ucontext->mw_list);
297 INIT_LIST_HEAD(&ucontext->cq_list);
298 INIT_LIST_HEAD(&ucontext->qp_list);
299 INIT_LIST_HEAD(&ucontext->srq_list);
300 INIT_LIST_HEAD(&ucontext->ah_list);
301 ucontext->closing = 0;
302
303 resp.num_comp_vectors = file->device->num_comp_vectors;
304
305 ret = get_unused_fd();
306 if (ret < 0)
307 goto err_free;
308 resp.async_fd = ret;
309
310 filp = ib_uverbs_alloc_event_file(file, 1);
311 if (IS_ERR(filp)) {
312 ret = PTR_ERR(filp);
313 goto err_fd;
314 }
315
316 if (copy_to_user((void __user *) (unsigned long) cmd.response,
317 &resp, sizeof resp)) {
318 ret = -EFAULT;
319 goto err_file;
320 }
321
322 file->async_file = filp->private_data;
323
324 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
325 ib_uverbs_event_handler);
326 ret = ib_register_event_handler(&file->event_handler);
327 if (ret)
328 goto err_file;
329
330 kref_get(&file->async_file->ref);
331 kref_get(&file->ref);
332 file->ucontext = ucontext;
333
334 fd_install(resp.async_fd, filp);
335
336 mutex_unlock(&file->mutex);
337
338 return in_len;
339
340 err_file:
341 fput(filp);
342
343 err_fd:
344 put_unused_fd(resp.async_fd);
345
346 err_free:
347 ibdev->dealloc_ucontext(ucontext);
348
349 err:
350 mutex_unlock(&file->mutex);
351 return ret;
352 }
353
354 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
355 const char __user *buf,
356 int in_len, int out_len)
357 {
358 struct ib_uverbs_query_device cmd;
359 struct ib_uverbs_query_device_resp resp;
360 struct ib_device_attr attr;
361 int ret;
362
363 if (out_len < sizeof resp)
364 return -ENOSPC;
365
366 if (copy_from_user(&cmd, buf, sizeof cmd))
367 return -EFAULT;
368
369 ret = ib_query_device(file->device->ib_dev, &attr);
370 if (ret)
371 return ret;
372
373 memset(&resp, 0, sizeof resp);
374
375 resp.fw_ver = attr.fw_ver;
376 resp.node_guid = file->device->ib_dev->node_guid;
377 resp.sys_image_guid = attr.sys_image_guid;
378 resp.max_mr_size = attr.max_mr_size;
379 resp.page_size_cap = attr.page_size_cap;
380 resp.vendor_id = attr.vendor_id;
381 resp.vendor_part_id = attr.vendor_part_id;
382 resp.hw_ver = attr.hw_ver;
383 resp.max_qp = attr.max_qp;
384 resp.max_qp_wr = attr.max_qp_wr;
385 resp.device_cap_flags = attr.device_cap_flags;
386 resp.max_sge = attr.max_sge;
387 resp.max_sge_rd = attr.max_sge_rd;
388 resp.max_cq = attr.max_cq;
389 resp.max_cqe = attr.max_cqe;
390 resp.max_mr = attr.max_mr;
391 resp.max_pd = attr.max_pd;
392 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
393 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
394 resp.max_res_rd_atom = attr.max_res_rd_atom;
395 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
396 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
397 resp.atomic_cap = attr.atomic_cap;
398 resp.max_ee = attr.max_ee;
399 resp.max_rdd = attr.max_rdd;
400 resp.max_mw = attr.max_mw;
401 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
402 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
403 resp.max_mcast_grp = attr.max_mcast_grp;
404 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
405 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
406 resp.max_ah = attr.max_ah;
407 resp.max_fmr = attr.max_fmr;
408 resp.max_map_per_fmr = attr.max_map_per_fmr;
409 resp.max_srq = attr.max_srq;
410 resp.max_srq_wr = attr.max_srq_wr;
411 resp.max_srq_sge = attr.max_srq_sge;
412 resp.max_pkeys = attr.max_pkeys;
413 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
414 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
415
416 if (copy_to_user((void __user *) (unsigned long) cmd.response,
417 &resp, sizeof resp))
418 return -EFAULT;
419
420 return in_len;
421 }
422
423 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
424 const char __user *buf,
425 int in_len, int out_len)
426 {
427 struct ib_uverbs_query_port cmd;
428 struct ib_uverbs_query_port_resp resp;
429 struct ib_port_attr attr;
430 int ret;
431
432 if (out_len < sizeof resp)
433 return -ENOSPC;
434
435 if (copy_from_user(&cmd, buf, sizeof cmd))
436 return -EFAULT;
437
438 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
439 if (ret)
440 return ret;
441
442 memset(&resp, 0, sizeof resp);
443
444 resp.state = attr.state;
445 resp.max_mtu = attr.max_mtu;
446 resp.active_mtu = attr.active_mtu;
447 resp.gid_tbl_len = attr.gid_tbl_len;
448 resp.port_cap_flags = attr.port_cap_flags;
449 resp.max_msg_sz = attr.max_msg_sz;
450 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
451 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
452 resp.pkey_tbl_len = attr.pkey_tbl_len;
453 resp.lid = attr.lid;
454 resp.sm_lid = attr.sm_lid;
455 resp.lmc = attr.lmc;
456 resp.max_vl_num = attr.max_vl_num;
457 resp.sm_sl = attr.sm_sl;
458 resp.subnet_timeout = attr.subnet_timeout;
459 resp.init_type_reply = attr.init_type_reply;
460 resp.active_width = attr.active_width;
461 resp.active_speed = attr.active_speed;
462 resp.phys_state = attr.phys_state;
463 resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev,
464 cmd.port_num);
465
466 if (copy_to_user((void __user *) (unsigned long) cmd.response,
467 &resp, sizeof resp))
468 return -EFAULT;
469
470 return in_len;
471 }
472
473 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
474 const char __user *buf,
475 int in_len, int out_len)
476 {
477 struct ib_uverbs_alloc_pd cmd;
478 struct ib_uverbs_alloc_pd_resp resp;
479 struct ib_udata udata;
480 struct ib_uobject *uobj;
481 struct ib_pd *pd;
482 int ret;
483
484 if (out_len < sizeof resp)
485 return -ENOSPC;
486
487 if (copy_from_user(&cmd, buf, sizeof cmd))
488 return -EFAULT;
489
490 INIT_UDATA(&udata, buf + sizeof cmd,
491 (unsigned long) cmd.response + sizeof resp,
492 in_len - sizeof cmd, out_len - sizeof resp);
493
494 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
495 if (!uobj)
496 return -ENOMEM;
497
498 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
499 down_write(&uobj->mutex);
500
501 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
502 file->ucontext, &udata);
503 if (IS_ERR(pd)) {
504 ret = PTR_ERR(pd);
505 goto err;
506 }
507
508 pd->device = file->device->ib_dev;
509 pd->uobject = uobj;
510 atomic_set(&pd->usecnt, 0);
511
512 uobj->object = pd;
513 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
514 if (ret)
515 goto err_idr;
516
517 memset(&resp, 0, sizeof resp);
518 resp.pd_handle = uobj->id;
519
520 if (copy_to_user((void __user *) (unsigned long) cmd.response,
521 &resp, sizeof resp)) {
522 ret = -EFAULT;
523 goto err_copy;
524 }
525
526 mutex_lock(&file->mutex);
527 list_add_tail(&uobj->list, &file->ucontext->pd_list);
528 mutex_unlock(&file->mutex);
529
530 uobj->live = 1;
531
532 up_write(&uobj->mutex);
533
534 return in_len;
535
536 err_copy:
537 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
538
539 err_idr:
540 ib_dealloc_pd(pd);
541
542 err:
543 put_uobj_write(uobj);
544 return ret;
545 }
546
547 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
548 const char __user *buf,
549 int in_len, int out_len)
550 {
551 struct ib_uverbs_dealloc_pd cmd;
552 struct ib_uobject *uobj;
553 int ret;
554
555 if (copy_from_user(&cmd, buf, sizeof cmd))
556 return -EFAULT;
557
558 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
559 if (!uobj)
560 return -EINVAL;
561
562 ret = ib_dealloc_pd(uobj->object);
563 if (!ret)
564 uobj->live = 0;
565
566 put_uobj_write(uobj);
567
568 if (ret)
569 return ret;
570
571 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
572
573 mutex_lock(&file->mutex);
574 list_del(&uobj->list);
575 mutex_unlock(&file->mutex);
576
577 put_uobj(uobj);
578
579 return in_len;
580 }
581
582 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
583 const char __user *buf, int in_len,
584 int out_len)
585 {
586 struct ib_uverbs_reg_mr cmd;
587 struct ib_uverbs_reg_mr_resp resp;
588 struct ib_udata udata;
589 struct ib_uobject *uobj;
590 struct ib_pd *pd;
591 struct ib_mr *mr;
592 int ret;
593
594 if (out_len < sizeof resp)
595 return -ENOSPC;
596
597 if (copy_from_user(&cmd, buf, sizeof cmd))
598 return -EFAULT;
599
600 INIT_UDATA(&udata, buf + sizeof cmd,
601 (unsigned long) cmd.response + sizeof resp,
602 in_len - sizeof cmd, out_len - sizeof resp);
603
604 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
605 return -EINVAL;
606
607 /*
608 * Local write permission is required if remote write or
609 * remote atomic permission is also requested.
610 */
611 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
612 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
613 return -EINVAL;
614
615 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
616 if (!uobj)
617 return -ENOMEM;
618
619 init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
620 down_write(&uobj->mutex);
621
622 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
623 if (!pd) {
624 ret = -EINVAL;
625 goto err_free;
626 }
627
628 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
629 cmd.access_flags, &udata);
630 if (IS_ERR(mr)) {
631 ret = PTR_ERR(mr);
632 goto err_put;
633 }
634
635 mr->device = pd->device;
636 mr->pd = pd;
637 mr->uobject = uobj;
638 atomic_inc(&pd->usecnt);
639 atomic_set(&mr->usecnt, 0);
640
641 uobj->object = mr;
642 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
643 if (ret)
644 goto err_unreg;
645
646 memset(&resp, 0, sizeof resp);
647 resp.lkey = mr->lkey;
648 resp.rkey = mr->rkey;
649 resp.mr_handle = uobj->id;
650
651 if (copy_to_user((void __user *) (unsigned long) cmd.response,
652 &resp, sizeof resp)) {
653 ret = -EFAULT;
654 goto err_copy;
655 }
656
657 put_pd_read(pd);
658
659 mutex_lock(&file->mutex);
660 list_add_tail(&uobj->list, &file->ucontext->mr_list);
661 mutex_unlock(&file->mutex);
662
663 uobj->live = 1;
664
665 up_write(&uobj->mutex);
666
667 return in_len;
668
669 err_copy:
670 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
671
672 err_unreg:
673 ib_dereg_mr(mr);
674
675 err_put:
676 put_pd_read(pd);
677
678 err_free:
679 put_uobj_write(uobj);
680 return ret;
681 }
682
683 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
684 const char __user *buf, int in_len,
685 int out_len)
686 {
687 struct ib_uverbs_dereg_mr cmd;
688 struct ib_mr *mr;
689 struct ib_uobject *uobj;
690 int ret = -EINVAL;
691
692 if (copy_from_user(&cmd, buf, sizeof cmd))
693 return -EFAULT;
694
695 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
696 if (!uobj)
697 return -EINVAL;
698
699 mr = uobj->object;
700
701 ret = ib_dereg_mr(mr);
702 if (!ret)
703 uobj->live = 0;
704
705 put_uobj_write(uobj);
706
707 if (ret)
708 return ret;
709
710 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
711
712 mutex_lock(&file->mutex);
713 list_del(&uobj->list);
714 mutex_unlock(&file->mutex);
715
716 put_uobj(uobj);
717
718 return in_len;
719 }
720
721 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
722 const char __user *buf, int in_len,
723 int out_len)
724 {
725 struct ib_uverbs_create_comp_channel cmd;
726 struct ib_uverbs_create_comp_channel_resp resp;
727 struct file *filp;
728 int ret;
729
730 if (out_len < sizeof resp)
731 return -ENOSPC;
732
733 if (copy_from_user(&cmd, buf, sizeof cmd))
734 return -EFAULT;
735
736 ret = get_unused_fd();
737 if (ret < 0)
738 return ret;
739 resp.fd = ret;
740
741 filp = ib_uverbs_alloc_event_file(file, 0);
742 if (IS_ERR(filp)) {
743 put_unused_fd(resp.fd);
744 return PTR_ERR(filp);
745 }
746
747 if (copy_to_user((void __user *) (unsigned long) cmd.response,
748 &resp, sizeof resp)) {
749 put_unused_fd(resp.fd);
750 fput(filp);
751 return -EFAULT;
752 }
753
754 fd_install(resp.fd, filp);
755 return in_len;
756 }
757
758 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
759 const char __user *buf, int in_len,
760 int out_len)
761 {
762 struct ib_uverbs_create_cq cmd;
763 struct ib_uverbs_create_cq_resp resp;
764 struct ib_udata udata;
765 struct ib_ucq_object *obj;
766 struct ib_uverbs_event_file *ev_file = NULL;
767 struct ib_cq *cq;
768 int ret;
769
770 if (out_len < sizeof resp)
771 return -ENOSPC;
772
773 if (copy_from_user(&cmd, buf, sizeof cmd))
774 return -EFAULT;
775
776 INIT_UDATA(&udata, buf + sizeof cmd,
777 (unsigned long) cmd.response + sizeof resp,
778 in_len - sizeof cmd, out_len - sizeof resp);
779
780 if (cmd.comp_vector >= file->device->num_comp_vectors)
781 return -EINVAL;
782
783 obj = kmalloc(sizeof *obj, GFP_KERNEL);
784 if (!obj)
785 return -ENOMEM;
786
787 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
788 down_write(&obj->uobject.mutex);
789
790 if (cmd.comp_channel >= 0) {
791 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
792 if (!ev_file) {
793 ret = -EINVAL;
794 goto err;
795 }
796 }
797
798 obj->uverbs_file = file;
799 obj->comp_events_reported = 0;
800 obj->async_events_reported = 0;
801 INIT_LIST_HEAD(&obj->comp_list);
802 INIT_LIST_HEAD(&obj->async_list);
803
804 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
805 cmd.comp_vector,
806 file->ucontext, &udata);
807 if (IS_ERR(cq)) {
808 ret = PTR_ERR(cq);
809 goto err_file;
810 }
811
812 cq->device = file->device->ib_dev;
813 cq->uobject = &obj->uobject;
814 cq->comp_handler = ib_uverbs_comp_handler;
815 cq->event_handler = ib_uverbs_cq_event_handler;
816 cq->cq_context = ev_file;
817 atomic_set(&cq->usecnt, 0);
818
819 obj->uobject.object = cq;
820 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
821 if (ret)
822 goto err_free;
823
824 memset(&resp, 0, sizeof resp);
825 resp.cq_handle = obj->uobject.id;
826 resp.cqe = cq->cqe;
827
828 if (copy_to_user((void __user *) (unsigned long) cmd.response,
829 &resp, sizeof resp)) {
830 ret = -EFAULT;
831 goto err_copy;
832 }
833
834 mutex_lock(&file->mutex);
835 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
836 mutex_unlock(&file->mutex);
837
838 obj->uobject.live = 1;
839
840 up_write(&obj->uobject.mutex);
841
842 return in_len;
843
844 err_copy:
845 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
846
847 err_free:
848 ib_destroy_cq(cq);
849
850 err_file:
851 if (ev_file)
852 ib_uverbs_release_ucq(file, ev_file, obj);
853
854 err:
855 put_uobj_write(&obj->uobject);
856 return ret;
857 }
858
859 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
860 const char __user *buf, int in_len,
861 int out_len)
862 {
863 struct ib_uverbs_resize_cq cmd;
864 struct ib_uverbs_resize_cq_resp resp;
865 struct ib_udata udata;
866 struct ib_cq *cq;
867 int ret = -EINVAL;
868
869 if (copy_from_user(&cmd, buf, sizeof cmd))
870 return -EFAULT;
871
872 INIT_UDATA(&udata, buf + sizeof cmd,
873 (unsigned long) cmd.response + sizeof resp,
874 in_len - sizeof cmd, out_len - sizeof resp);
875
876 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
877 if (!cq)
878 return -EINVAL;
879
880 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
881 if (ret)
882 goto out;
883
884 resp.cqe = cq->cqe;
885
886 if (copy_to_user((void __user *) (unsigned long) cmd.response,
887 &resp, sizeof resp.cqe))
888 ret = -EFAULT;
889
890 out:
891 put_cq_read(cq);
892
893 return ret ? ret : in_len;
894 }
895
896 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
897 {
898 struct ib_uverbs_wc tmp;
899
900 tmp.wr_id = wc->wr_id;
901 tmp.status = wc->status;
902 tmp.opcode = wc->opcode;
903 tmp.vendor_err = wc->vendor_err;
904 tmp.byte_len = wc->byte_len;
905 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
906 tmp.qp_num = wc->qp->qp_num;
907 tmp.src_qp = wc->src_qp;
908 tmp.wc_flags = wc->wc_flags;
909 tmp.pkey_index = wc->pkey_index;
910 tmp.slid = wc->slid;
911 tmp.sl = wc->sl;
912 tmp.dlid_path_bits = wc->dlid_path_bits;
913 tmp.port_num = wc->port_num;
914 tmp.reserved = 0;
915
916 if (copy_to_user(dest, &tmp, sizeof tmp))
917 return -EFAULT;
918
919 return 0;
920 }
921
922 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
923 const char __user *buf, int in_len,
924 int out_len)
925 {
926 struct ib_uverbs_poll_cq cmd;
927 struct ib_uverbs_poll_cq_resp resp;
928 u8 __user *header_ptr;
929 u8 __user *data_ptr;
930 struct ib_cq *cq;
931 struct ib_wc wc;
932 int ret;
933
934 if (copy_from_user(&cmd, buf, sizeof cmd))
935 return -EFAULT;
936
937 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
938 if (!cq)
939 return -EINVAL;
940
941 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
942 header_ptr = (void __user *)(unsigned long) cmd.response;
943 data_ptr = header_ptr + sizeof resp;
944
945 memset(&resp, 0, sizeof resp);
946 while (resp.count < cmd.ne) {
947 ret = ib_poll_cq(cq, 1, &wc);
948 if (ret < 0)
949 goto out_put;
950 if (!ret)
951 break;
952
953 ret = copy_wc_to_user(data_ptr, &wc);
954 if (ret)
955 goto out_put;
956
957 data_ptr += sizeof(struct ib_uverbs_wc);
958 ++resp.count;
959 }
960
961 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
962 ret = -EFAULT;
963 goto out_put;
964 }
965
966 ret = in_len;
967
968 out_put:
969 put_cq_read(cq);
970 return ret;
971 }
972
973 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
974 const char __user *buf, int in_len,
975 int out_len)
976 {
977 struct ib_uverbs_req_notify_cq cmd;
978 struct ib_cq *cq;
979
980 if (copy_from_user(&cmd, buf, sizeof cmd))
981 return -EFAULT;
982
983 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
984 if (!cq)
985 return -EINVAL;
986
987 ib_req_notify_cq(cq, cmd.solicited_only ?
988 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
989
990 put_cq_read(cq);
991
992 return in_len;
993 }
994
995 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
996 const char __user *buf, int in_len,
997 int out_len)
998 {
999 struct ib_uverbs_destroy_cq cmd;
1000 struct ib_uverbs_destroy_cq_resp resp;
1001 struct ib_uobject *uobj;
1002 struct ib_cq *cq;
1003 struct ib_ucq_object *obj;
1004 struct ib_uverbs_event_file *ev_file;
1005 int ret = -EINVAL;
1006
1007 if (copy_from_user(&cmd, buf, sizeof cmd))
1008 return -EFAULT;
1009
1010 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1011 if (!uobj)
1012 return -EINVAL;
1013 cq = uobj->object;
1014 ev_file = cq->cq_context;
1015 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1016
1017 ret = ib_destroy_cq(cq);
1018 if (!ret)
1019 uobj->live = 0;
1020
1021 put_uobj_write(uobj);
1022
1023 if (ret)
1024 return ret;
1025
1026 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1027
1028 mutex_lock(&file->mutex);
1029 list_del(&uobj->list);
1030 mutex_unlock(&file->mutex);
1031
1032 ib_uverbs_release_ucq(file, ev_file, obj);
1033
1034 memset(&resp, 0, sizeof resp);
1035 resp.comp_events_reported = obj->comp_events_reported;
1036 resp.async_events_reported = obj->async_events_reported;
1037
1038 put_uobj(uobj);
1039
1040 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1041 &resp, sizeof resp))
1042 return -EFAULT;
1043
1044 return in_len;
1045 }
1046
1047 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1048 const char __user *buf, int in_len,
1049 int out_len)
1050 {
1051 struct ib_uverbs_create_qp cmd;
1052 struct ib_uverbs_create_qp_resp resp;
1053 struct ib_udata udata;
1054 struct ib_uqp_object *obj;
1055 struct ib_pd *pd;
1056 struct ib_cq *scq, *rcq;
1057 struct ib_srq *srq;
1058 struct ib_qp *qp;
1059 struct ib_qp_init_attr attr;
1060 int ret;
1061
1062 if (out_len < sizeof resp)
1063 return -ENOSPC;
1064
1065 if (copy_from_user(&cmd, buf, sizeof cmd))
1066 return -EFAULT;
1067
1068 INIT_UDATA(&udata, buf + sizeof cmd,
1069 (unsigned long) cmd.response + sizeof resp,
1070 in_len - sizeof cmd, out_len - sizeof resp);
1071
1072 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1073 if (!obj)
1074 return -ENOMEM;
1075
1076 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1077 down_write(&obj->uevent.uobject.mutex);
1078
1079 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1080 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1081 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1082 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1083 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1084
1085 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1086 ret = -EINVAL;
1087 goto err_put;
1088 }
1089
1090 attr.event_handler = ib_uverbs_qp_event_handler;
1091 attr.qp_context = file;
1092 attr.send_cq = scq;
1093 attr.recv_cq = rcq;
1094 attr.srq = srq;
1095 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1096 attr.qp_type = cmd.qp_type;
1097 attr.create_flags = 0;
1098
1099 attr.cap.max_send_wr = cmd.max_send_wr;
1100 attr.cap.max_recv_wr = cmd.max_recv_wr;
1101 attr.cap.max_send_sge = cmd.max_send_sge;
1102 attr.cap.max_recv_sge = cmd.max_recv_sge;
1103 attr.cap.max_inline_data = cmd.max_inline_data;
1104
1105 obj->uevent.events_reported = 0;
1106 INIT_LIST_HEAD(&obj->uevent.event_list);
1107 INIT_LIST_HEAD(&obj->mcast_list);
1108
1109 qp = pd->device->create_qp(pd, &attr, &udata);
1110 if (IS_ERR(qp)) {
1111 ret = PTR_ERR(qp);
1112 goto err_put;
1113 }
1114
1115 qp->device = pd->device;
1116 qp->pd = pd;
1117 qp->send_cq = attr.send_cq;
1118 qp->recv_cq = attr.recv_cq;
1119 qp->srq = attr.srq;
1120 qp->uobject = &obj->uevent.uobject;
1121 qp->event_handler = attr.event_handler;
1122 qp->qp_context = attr.qp_context;
1123 qp->qp_type = attr.qp_type;
1124 atomic_inc(&pd->usecnt);
1125 atomic_inc(&attr.send_cq->usecnt);
1126 atomic_inc(&attr.recv_cq->usecnt);
1127 if (attr.srq)
1128 atomic_inc(&attr.srq->usecnt);
1129
1130 obj->uevent.uobject.object = qp;
1131 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1132 if (ret)
1133 goto err_destroy;
1134
1135 memset(&resp, 0, sizeof resp);
1136 resp.qpn = qp->qp_num;
1137 resp.qp_handle = obj->uevent.uobject.id;
1138 resp.max_recv_sge = attr.cap.max_recv_sge;
1139 resp.max_send_sge = attr.cap.max_send_sge;
1140 resp.max_recv_wr = attr.cap.max_recv_wr;
1141 resp.max_send_wr = attr.cap.max_send_wr;
1142 resp.max_inline_data = attr.cap.max_inline_data;
1143
1144 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1145 &resp, sizeof resp)) {
1146 ret = -EFAULT;
1147 goto err_copy;
1148 }
1149
1150 put_pd_read(pd);
1151 put_cq_read(scq);
1152 if (rcq != scq)
1153 put_cq_read(rcq);
1154 if (srq)
1155 put_srq_read(srq);
1156
1157 mutex_lock(&file->mutex);
1158 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1159 mutex_unlock(&file->mutex);
1160
1161 obj->uevent.uobject.live = 1;
1162
1163 up_write(&obj->uevent.uobject.mutex);
1164
1165 return in_len;
1166
1167 err_copy:
1168 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1169
1170 err_destroy:
1171 ib_destroy_qp(qp);
1172
1173 err_put:
1174 if (pd)
1175 put_pd_read(pd);
1176 if (scq)
1177 put_cq_read(scq);
1178 if (rcq && rcq != scq)
1179 put_cq_read(rcq);
1180 if (srq)
1181 put_srq_read(srq);
1182
1183 put_uobj_write(&obj->uevent.uobject);
1184 return ret;
1185 }
1186
1187 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1188 const char __user *buf, int in_len,
1189 int out_len)
1190 {
1191 struct ib_uverbs_query_qp cmd;
1192 struct ib_uverbs_query_qp_resp resp;
1193 struct ib_qp *qp;
1194 struct ib_qp_attr *attr;
1195 struct ib_qp_init_attr *init_attr;
1196 int ret;
1197
1198 if (copy_from_user(&cmd, buf, sizeof cmd))
1199 return -EFAULT;
1200
1201 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1202 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1203 if (!attr || !init_attr) {
1204 ret = -ENOMEM;
1205 goto out;
1206 }
1207
1208 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1209 if (!qp) {
1210 ret = -EINVAL;
1211 goto out;
1212 }
1213
1214 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1215
1216 put_qp_read(qp);
1217
1218 if (ret)
1219 goto out;
1220
1221 memset(&resp, 0, sizeof resp);
1222
1223 resp.qp_state = attr->qp_state;
1224 resp.cur_qp_state = attr->cur_qp_state;
1225 resp.path_mtu = attr->path_mtu;
1226 resp.path_mig_state = attr->path_mig_state;
1227 resp.qkey = attr->qkey;
1228 resp.rq_psn = attr->rq_psn;
1229 resp.sq_psn = attr->sq_psn;
1230 resp.dest_qp_num = attr->dest_qp_num;
1231 resp.qp_access_flags = attr->qp_access_flags;
1232 resp.pkey_index = attr->pkey_index;
1233 resp.alt_pkey_index = attr->alt_pkey_index;
1234 resp.sq_draining = attr->sq_draining;
1235 resp.max_rd_atomic = attr->max_rd_atomic;
1236 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1237 resp.min_rnr_timer = attr->min_rnr_timer;
1238 resp.port_num = attr->port_num;
1239 resp.timeout = attr->timeout;
1240 resp.retry_cnt = attr->retry_cnt;
1241 resp.rnr_retry = attr->rnr_retry;
1242 resp.alt_port_num = attr->alt_port_num;
1243 resp.alt_timeout = attr->alt_timeout;
1244
1245 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1246 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1247 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1248 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1249 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1250 resp.dest.dlid = attr->ah_attr.dlid;
1251 resp.dest.sl = attr->ah_attr.sl;
1252 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1253 resp.dest.static_rate = attr->ah_attr.static_rate;
1254 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1255 resp.dest.port_num = attr->ah_attr.port_num;
1256
1257 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1258 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1259 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1260 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1261 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1262 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1263 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1264 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1265 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1266 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1267 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1268
1269 resp.max_send_wr = init_attr->cap.max_send_wr;
1270 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1271 resp.max_send_sge = init_attr->cap.max_send_sge;
1272 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1273 resp.max_inline_data = init_attr->cap.max_inline_data;
1274 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1275
1276 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1277 &resp, sizeof resp))
1278 ret = -EFAULT;
1279
1280 out:
1281 kfree(attr);
1282 kfree(init_attr);
1283
1284 return ret ? ret : in_len;
1285 }
1286
1287 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1288 const char __user *buf, int in_len,
1289 int out_len)
1290 {
1291 struct ib_uverbs_modify_qp cmd;
1292 struct ib_udata udata;
1293 struct ib_qp *qp;
1294 struct ib_qp_attr *attr;
1295 int ret;
1296
1297 if (copy_from_user(&cmd, buf, sizeof cmd))
1298 return -EFAULT;
1299
1300 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1301 out_len);
1302
1303 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1304 if (!attr)
1305 return -ENOMEM;
1306
1307 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1308 if (!qp) {
1309 ret = -EINVAL;
1310 goto out;
1311 }
1312
1313 attr->qp_state = cmd.qp_state;
1314 attr->cur_qp_state = cmd.cur_qp_state;
1315 attr->path_mtu = cmd.path_mtu;
1316 attr->path_mig_state = cmd.path_mig_state;
1317 attr->qkey = cmd.qkey;
1318 attr->rq_psn = cmd.rq_psn;
1319 attr->sq_psn = cmd.sq_psn;
1320 attr->dest_qp_num = cmd.dest_qp_num;
1321 attr->qp_access_flags = cmd.qp_access_flags;
1322 attr->pkey_index = cmd.pkey_index;
1323 attr->alt_pkey_index = cmd.alt_pkey_index;
1324 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1325 attr->max_rd_atomic = cmd.max_rd_atomic;
1326 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1327 attr->min_rnr_timer = cmd.min_rnr_timer;
1328 attr->port_num = cmd.port_num;
1329 attr->timeout = cmd.timeout;
1330 attr->retry_cnt = cmd.retry_cnt;
1331 attr->rnr_retry = cmd.rnr_retry;
1332 attr->alt_port_num = cmd.alt_port_num;
1333 attr->alt_timeout = cmd.alt_timeout;
1334
1335 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1336 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1337 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1338 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1339 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1340 attr->ah_attr.dlid = cmd.dest.dlid;
1341 attr->ah_attr.sl = cmd.dest.sl;
1342 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1343 attr->ah_attr.static_rate = cmd.dest.static_rate;
1344 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1345 attr->ah_attr.port_num = cmd.dest.port_num;
1346
1347 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1348 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1349 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1350 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1351 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1352 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1353 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1354 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1355 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1356 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1357 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1358
1359 ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1360
1361 put_qp_read(qp);
1362
1363 if (ret)
1364 goto out;
1365
1366 ret = in_len;
1367
1368 out:
1369 kfree(attr);
1370
1371 return ret;
1372 }
1373
1374 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1375 const char __user *buf, int in_len,
1376 int out_len)
1377 {
1378 struct ib_uverbs_destroy_qp cmd;
1379 struct ib_uverbs_destroy_qp_resp resp;
1380 struct ib_uobject *uobj;
1381 struct ib_qp *qp;
1382 struct ib_uqp_object *obj;
1383 int ret = -EINVAL;
1384
1385 if (copy_from_user(&cmd, buf, sizeof cmd))
1386 return -EFAULT;
1387
1388 memset(&resp, 0, sizeof resp);
1389
1390 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1391 if (!uobj)
1392 return -EINVAL;
1393 qp = uobj->object;
1394 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1395
1396 if (!list_empty(&obj->mcast_list)) {
1397 put_uobj_write(uobj);
1398 return -EBUSY;
1399 }
1400
1401 ret = ib_destroy_qp(qp);
1402 if (!ret)
1403 uobj->live = 0;
1404
1405 put_uobj_write(uobj);
1406
1407 if (ret)
1408 return ret;
1409
1410 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1411
1412 mutex_lock(&file->mutex);
1413 list_del(&uobj->list);
1414 mutex_unlock(&file->mutex);
1415
1416 ib_uverbs_release_uevent(file, &obj->uevent);
1417
1418 resp.events_reported = obj->uevent.events_reported;
1419
1420 put_uobj(uobj);
1421
1422 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1423 &resp, sizeof resp))
1424 return -EFAULT;
1425
1426 return in_len;
1427 }
1428
1429 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1430 const char __user *buf, int in_len,
1431 int out_len)
1432 {
1433 struct ib_uverbs_post_send cmd;
1434 struct ib_uverbs_post_send_resp resp;
1435 struct ib_uverbs_send_wr *user_wr;
1436 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1437 struct ib_qp *qp;
1438 int i, sg_ind;
1439 int is_ud;
1440 ssize_t ret = -EINVAL;
1441
1442 if (copy_from_user(&cmd, buf, sizeof cmd))
1443 return -EFAULT;
1444
1445 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1446 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1447 return -EINVAL;
1448
1449 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1450 return -EINVAL;
1451
1452 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1453 if (!user_wr)
1454 return -ENOMEM;
1455
1456 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1457 if (!qp)
1458 goto out;
1459
1460 is_ud = qp->qp_type == IB_QPT_UD;
1461 sg_ind = 0;
1462 last = NULL;
1463 for (i = 0; i < cmd.wr_count; ++i) {
1464 if (copy_from_user(user_wr,
1465 buf + sizeof cmd + i * cmd.wqe_size,
1466 cmd.wqe_size)) {
1467 ret = -EFAULT;
1468 goto out_put;
1469 }
1470
1471 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1472 ret = -EINVAL;
1473 goto out_put;
1474 }
1475
1476 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1477 user_wr->num_sge * sizeof (struct ib_sge),
1478 GFP_KERNEL);
1479 if (!next) {
1480 ret = -ENOMEM;
1481 goto out_put;
1482 }
1483
1484 if (!last)
1485 wr = next;
1486 else
1487 last->next = next;
1488 last = next;
1489
1490 next->next = NULL;
1491 next->wr_id = user_wr->wr_id;
1492 next->num_sge = user_wr->num_sge;
1493 next->opcode = user_wr->opcode;
1494 next->send_flags = user_wr->send_flags;
1495
1496 if (is_ud) {
1497 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1498 file->ucontext);
1499 if (!next->wr.ud.ah) {
1500 ret = -EINVAL;
1501 goto out_put;
1502 }
1503 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1504 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1505 } else {
1506 switch (next->opcode) {
1507 case IB_WR_RDMA_WRITE_WITH_IMM:
1508 next->ex.imm_data =
1509 (__be32 __force) user_wr->ex.imm_data;
1510 case IB_WR_RDMA_WRITE:
1511 case IB_WR_RDMA_READ:
1512 next->wr.rdma.remote_addr =
1513 user_wr->wr.rdma.remote_addr;
1514 next->wr.rdma.rkey =
1515 user_wr->wr.rdma.rkey;
1516 break;
1517 case IB_WR_SEND_WITH_IMM:
1518 next->ex.imm_data =
1519 (__be32 __force) user_wr->ex.imm_data;
1520 break;
1521 case IB_WR_SEND_WITH_INV:
1522 next->ex.invalidate_rkey =
1523 user_wr->ex.invalidate_rkey;
1524 break;
1525 case IB_WR_ATOMIC_CMP_AND_SWP:
1526 case IB_WR_ATOMIC_FETCH_AND_ADD:
1527 next->wr.atomic.remote_addr =
1528 user_wr->wr.atomic.remote_addr;
1529 next->wr.atomic.compare_add =
1530 user_wr->wr.atomic.compare_add;
1531 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1532 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1533 break;
1534 default:
1535 break;
1536 }
1537 }
1538
1539 if (next->num_sge) {
1540 next->sg_list = (void *) next +
1541 ALIGN(sizeof *next, sizeof (struct ib_sge));
1542 if (copy_from_user(next->sg_list,
1543 buf + sizeof cmd +
1544 cmd.wr_count * cmd.wqe_size +
1545 sg_ind * sizeof (struct ib_sge),
1546 next->num_sge * sizeof (struct ib_sge))) {
1547 ret = -EFAULT;
1548 goto out_put;
1549 }
1550 sg_ind += next->num_sge;
1551 } else
1552 next->sg_list = NULL;
1553 }
1554
1555 resp.bad_wr = 0;
1556 ret = qp->device->post_send(qp, wr, &bad_wr);
1557 if (ret)
1558 for (next = wr; next; next = next->next) {
1559 ++resp.bad_wr;
1560 if (next == bad_wr)
1561 break;
1562 }
1563
1564 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1565 &resp, sizeof resp))
1566 ret = -EFAULT;
1567
1568 out_put:
1569 put_qp_read(qp);
1570
1571 while (wr) {
1572 if (is_ud && wr->wr.ud.ah)
1573 put_ah_read(wr->wr.ud.ah);
1574 next = wr->next;
1575 kfree(wr);
1576 wr = next;
1577 }
1578
1579 out:
1580 kfree(user_wr);
1581
1582 return ret ? ret : in_len;
1583 }
1584
1585 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1586 int in_len,
1587 u32 wr_count,
1588 u32 sge_count,
1589 u32 wqe_size)
1590 {
1591 struct ib_uverbs_recv_wr *user_wr;
1592 struct ib_recv_wr *wr = NULL, *last, *next;
1593 int sg_ind;
1594 int i;
1595 int ret;
1596
1597 if (in_len < wqe_size * wr_count +
1598 sge_count * sizeof (struct ib_uverbs_sge))
1599 return ERR_PTR(-EINVAL);
1600
1601 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1602 return ERR_PTR(-EINVAL);
1603
1604 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1605 if (!user_wr)
1606 return ERR_PTR(-ENOMEM);
1607
1608 sg_ind = 0;
1609 last = NULL;
1610 for (i = 0; i < wr_count; ++i) {
1611 if (copy_from_user(user_wr, buf + i * wqe_size,
1612 wqe_size)) {
1613 ret = -EFAULT;
1614 goto err;
1615 }
1616
1617 if (user_wr->num_sge + sg_ind > sge_count) {
1618 ret = -EINVAL;
1619 goto err;
1620 }
1621
1622 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1623 user_wr->num_sge * sizeof (struct ib_sge),
1624 GFP_KERNEL);
1625 if (!next) {
1626 ret = -ENOMEM;
1627 goto err;
1628 }
1629
1630 if (!last)
1631 wr = next;
1632 else
1633 last->next = next;
1634 last = next;
1635
1636 next->next = NULL;
1637 next->wr_id = user_wr->wr_id;
1638 next->num_sge = user_wr->num_sge;
1639
1640 if (next->num_sge) {
1641 next->sg_list = (void *) next +
1642 ALIGN(sizeof *next, sizeof (struct ib_sge));
1643 if (copy_from_user(next->sg_list,
1644 buf + wr_count * wqe_size +
1645 sg_ind * sizeof (struct ib_sge),
1646 next->num_sge * sizeof (struct ib_sge))) {
1647 ret = -EFAULT;
1648 goto err;
1649 }
1650 sg_ind += next->num_sge;
1651 } else
1652 next->sg_list = NULL;
1653 }
1654
1655 kfree(user_wr);
1656 return wr;
1657
1658 err:
1659 kfree(user_wr);
1660
1661 while (wr) {
1662 next = wr->next;
1663 kfree(wr);
1664 wr = next;
1665 }
1666
1667 return ERR_PTR(ret);
1668 }
1669
1670 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1671 const char __user *buf, int in_len,
1672 int out_len)
1673 {
1674 struct ib_uverbs_post_recv cmd;
1675 struct ib_uverbs_post_recv_resp resp;
1676 struct ib_recv_wr *wr, *next, *bad_wr;
1677 struct ib_qp *qp;
1678 ssize_t ret = -EINVAL;
1679
1680 if (copy_from_user(&cmd, buf, sizeof cmd))
1681 return -EFAULT;
1682
1683 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1684 in_len - sizeof cmd, cmd.wr_count,
1685 cmd.sge_count, cmd.wqe_size);
1686 if (IS_ERR(wr))
1687 return PTR_ERR(wr);
1688
1689 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1690 if (!qp)
1691 goto out;
1692
1693 resp.bad_wr = 0;
1694 ret = qp->device->post_recv(qp, wr, &bad_wr);
1695
1696 put_qp_read(qp);
1697
1698 if (ret)
1699 for (next = wr; next; next = next->next) {
1700 ++resp.bad_wr;
1701 if (next == bad_wr)
1702 break;
1703 }
1704
1705 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1706 &resp, sizeof resp))
1707 ret = -EFAULT;
1708
1709 out:
1710 while (wr) {
1711 next = wr->next;
1712 kfree(wr);
1713 wr = next;
1714 }
1715
1716 return ret ? ret : in_len;
1717 }
1718
1719 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1720 const char __user *buf, int in_len,
1721 int out_len)
1722 {
1723 struct ib_uverbs_post_srq_recv cmd;
1724 struct ib_uverbs_post_srq_recv_resp resp;
1725 struct ib_recv_wr *wr, *next, *bad_wr;
1726 struct ib_srq *srq;
1727 ssize_t ret = -EINVAL;
1728
1729 if (copy_from_user(&cmd, buf, sizeof cmd))
1730 return -EFAULT;
1731
1732 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1733 in_len - sizeof cmd, cmd.wr_count,
1734 cmd.sge_count, cmd.wqe_size);
1735 if (IS_ERR(wr))
1736 return PTR_ERR(wr);
1737
1738 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1739 if (!srq)
1740 goto out;
1741
1742 resp.bad_wr = 0;
1743 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1744
1745 put_srq_read(srq);
1746
1747 if (ret)
1748 for (next = wr; next; next = next->next) {
1749 ++resp.bad_wr;
1750 if (next == bad_wr)
1751 break;
1752 }
1753
1754 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1755 &resp, sizeof resp))
1756 ret = -EFAULT;
1757
1758 out:
1759 while (wr) {
1760 next = wr->next;
1761 kfree(wr);
1762 wr = next;
1763 }
1764
1765 return ret ? ret : in_len;
1766 }
1767
1768 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1769 const char __user *buf, int in_len,
1770 int out_len)
1771 {
1772 struct ib_uverbs_create_ah cmd;
1773 struct ib_uverbs_create_ah_resp resp;
1774 struct ib_uobject *uobj;
1775 struct ib_pd *pd;
1776 struct ib_ah *ah;
1777 struct ib_ah_attr attr;
1778 int ret;
1779
1780 if (out_len < sizeof resp)
1781 return -ENOSPC;
1782
1783 if (copy_from_user(&cmd, buf, sizeof cmd))
1784 return -EFAULT;
1785
1786 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1787 if (!uobj)
1788 return -ENOMEM;
1789
1790 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1791 down_write(&uobj->mutex);
1792
1793 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1794 if (!pd) {
1795 ret = -EINVAL;
1796 goto err;
1797 }
1798
1799 attr.dlid = cmd.attr.dlid;
1800 attr.sl = cmd.attr.sl;
1801 attr.src_path_bits = cmd.attr.src_path_bits;
1802 attr.static_rate = cmd.attr.static_rate;
1803 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
1804 attr.port_num = cmd.attr.port_num;
1805 attr.grh.flow_label = cmd.attr.grh.flow_label;
1806 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1807 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1808 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1809 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1810
1811 ah = ib_create_ah(pd, &attr);
1812 if (IS_ERR(ah)) {
1813 ret = PTR_ERR(ah);
1814 goto err_put;
1815 }
1816
1817 ah->uobject = uobj;
1818 uobj->object = ah;
1819
1820 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1821 if (ret)
1822 goto err_destroy;
1823
1824 resp.ah_handle = uobj->id;
1825
1826 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1827 &resp, sizeof resp)) {
1828 ret = -EFAULT;
1829 goto err_copy;
1830 }
1831
1832 put_pd_read(pd);
1833
1834 mutex_lock(&file->mutex);
1835 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1836 mutex_unlock(&file->mutex);
1837
1838 uobj->live = 1;
1839
1840 up_write(&uobj->mutex);
1841
1842 return in_len;
1843
1844 err_copy:
1845 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1846
1847 err_destroy:
1848 ib_destroy_ah(ah);
1849
1850 err_put:
1851 put_pd_read(pd);
1852
1853 err:
1854 put_uobj_write(uobj);
1855 return ret;
1856 }
1857
1858 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1859 const char __user *buf, int in_len, int out_len)
1860 {
1861 struct ib_uverbs_destroy_ah cmd;
1862 struct ib_ah *ah;
1863 struct ib_uobject *uobj;
1864 int ret;
1865
1866 if (copy_from_user(&cmd, buf, sizeof cmd))
1867 return -EFAULT;
1868
1869 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1870 if (!uobj)
1871 return -EINVAL;
1872 ah = uobj->object;
1873
1874 ret = ib_destroy_ah(ah);
1875 if (!ret)
1876 uobj->live = 0;
1877
1878 put_uobj_write(uobj);
1879
1880 if (ret)
1881 return ret;
1882
1883 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1884
1885 mutex_lock(&file->mutex);
1886 list_del(&uobj->list);
1887 mutex_unlock(&file->mutex);
1888
1889 put_uobj(uobj);
1890
1891 return in_len;
1892 }
1893
1894 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1895 const char __user *buf, int in_len,
1896 int out_len)
1897 {
1898 struct ib_uverbs_attach_mcast cmd;
1899 struct ib_qp *qp;
1900 struct ib_uqp_object *obj;
1901 struct ib_uverbs_mcast_entry *mcast;
1902 int ret;
1903
1904 if (copy_from_user(&cmd, buf, sizeof cmd))
1905 return -EFAULT;
1906
1907 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1908 if (!qp)
1909 return -EINVAL;
1910
1911 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1912
1913 list_for_each_entry(mcast, &obj->mcast_list, list)
1914 if (cmd.mlid == mcast->lid &&
1915 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1916 ret = 0;
1917 goto out_put;
1918 }
1919
1920 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1921 if (!mcast) {
1922 ret = -ENOMEM;
1923 goto out_put;
1924 }
1925
1926 mcast->lid = cmd.mlid;
1927 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1928
1929 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1930 if (!ret)
1931 list_add_tail(&mcast->list, &obj->mcast_list);
1932 else
1933 kfree(mcast);
1934
1935 out_put:
1936 put_qp_read(qp);
1937
1938 return ret ? ret : in_len;
1939 }
1940
1941 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1942 const char __user *buf, int in_len,
1943 int out_len)
1944 {
1945 struct ib_uverbs_detach_mcast cmd;
1946 struct ib_uqp_object *obj;
1947 struct ib_qp *qp;
1948 struct ib_uverbs_mcast_entry *mcast;
1949 int ret = -EINVAL;
1950
1951 if (copy_from_user(&cmd, buf, sizeof cmd))
1952 return -EFAULT;
1953
1954 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1955 if (!qp)
1956 return -EINVAL;
1957
1958 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1959 if (ret)
1960 goto out_put;
1961
1962 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1963
1964 list_for_each_entry(mcast, &obj->mcast_list, list)
1965 if (cmd.mlid == mcast->lid &&
1966 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1967 list_del(&mcast->list);
1968 kfree(mcast);
1969 break;
1970 }
1971
1972 out_put:
1973 put_qp_read(qp);
1974
1975 return ret ? ret : in_len;
1976 }
1977
1978 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1979 const char __user *buf, int in_len,
1980 int out_len)
1981 {
1982 struct ib_uverbs_create_srq cmd;
1983 struct ib_uverbs_create_srq_resp resp;
1984 struct ib_udata udata;
1985 struct ib_uevent_object *obj;
1986 struct ib_pd *pd;
1987 struct ib_srq *srq;
1988 struct ib_srq_init_attr attr;
1989 int ret;
1990
1991 if (out_len < sizeof resp)
1992 return -ENOSPC;
1993
1994 if (copy_from_user(&cmd, buf, sizeof cmd))
1995 return -EFAULT;
1996
1997 INIT_UDATA(&udata, buf + sizeof cmd,
1998 (unsigned long) cmd.response + sizeof resp,
1999 in_len - sizeof cmd, out_len - sizeof resp);
2000
2001 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2002 if (!obj)
2003 return -ENOMEM;
2004
2005 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
2006 down_write(&obj->uobject.mutex);
2007
2008 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2009 if (!pd) {
2010 ret = -EINVAL;
2011 goto err;
2012 }
2013
2014 attr.event_handler = ib_uverbs_srq_event_handler;
2015 attr.srq_context = file;
2016 attr.attr.max_wr = cmd.max_wr;
2017 attr.attr.max_sge = cmd.max_sge;
2018 attr.attr.srq_limit = cmd.srq_limit;
2019
2020 obj->events_reported = 0;
2021 INIT_LIST_HEAD(&obj->event_list);
2022
2023 srq = pd->device->create_srq(pd, &attr, &udata);
2024 if (IS_ERR(srq)) {
2025 ret = PTR_ERR(srq);
2026 goto err_put;
2027 }
2028
2029 srq->device = pd->device;
2030 srq->pd = pd;
2031 srq->uobject = &obj->uobject;
2032 srq->event_handler = attr.event_handler;
2033 srq->srq_context = attr.srq_context;
2034 atomic_inc(&pd->usecnt);
2035 atomic_set(&srq->usecnt, 0);
2036
2037 obj->uobject.object = srq;
2038 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2039 if (ret)
2040 goto err_destroy;
2041
2042 memset(&resp, 0, sizeof resp);
2043 resp.srq_handle = obj->uobject.id;
2044 resp.max_wr = attr.attr.max_wr;
2045 resp.max_sge = attr.attr.max_sge;
2046
2047 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2048 &resp, sizeof resp)) {
2049 ret = -EFAULT;
2050 goto err_copy;
2051 }
2052
2053 put_pd_read(pd);
2054
2055 mutex_lock(&file->mutex);
2056 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2057 mutex_unlock(&file->mutex);
2058
2059 obj->uobject.live = 1;
2060
2061 up_write(&obj->uobject.mutex);
2062
2063 return in_len;
2064
2065 err_copy:
2066 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2067
2068 err_destroy:
2069 ib_destroy_srq(srq);
2070
2071 err_put:
2072 put_pd_read(pd);
2073
2074 err:
2075 put_uobj_write(&obj->uobject);
2076 return ret;
2077 }
2078
2079 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2080 const char __user *buf, int in_len,
2081 int out_len)
2082 {
2083 struct ib_uverbs_modify_srq cmd;
2084 struct ib_udata udata;
2085 struct ib_srq *srq;
2086 struct ib_srq_attr attr;
2087 int ret;
2088
2089 if (copy_from_user(&cmd, buf, sizeof cmd))
2090 return -EFAULT;
2091
2092 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2093 out_len);
2094
2095 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2096 if (!srq)
2097 return -EINVAL;
2098
2099 attr.max_wr = cmd.max_wr;
2100 attr.srq_limit = cmd.srq_limit;
2101
2102 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2103
2104 put_srq_read(srq);
2105
2106 return ret ? ret : in_len;
2107 }
2108
2109 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2110 const char __user *buf,
2111 int in_len, int out_len)
2112 {
2113 struct ib_uverbs_query_srq cmd;
2114 struct ib_uverbs_query_srq_resp resp;
2115 struct ib_srq_attr attr;
2116 struct ib_srq *srq;
2117 int ret;
2118
2119 if (out_len < sizeof resp)
2120 return -ENOSPC;
2121
2122 if (copy_from_user(&cmd, buf, sizeof cmd))
2123 return -EFAULT;
2124
2125 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2126 if (!srq)
2127 return -EINVAL;
2128
2129 ret = ib_query_srq(srq, &attr);
2130
2131 put_srq_read(srq);
2132
2133 if (ret)
2134 return ret;
2135
2136 memset(&resp, 0, sizeof resp);
2137
2138 resp.max_wr = attr.max_wr;
2139 resp.max_sge = attr.max_sge;
2140 resp.srq_limit = attr.srq_limit;
2141
2142 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2143 &resp, sizeof resp))
2144 return -EFAULT;
2145
2146 return in_len;
2147 }
2148
2149 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2150 const char __user *buf, int in_len,
2151 int out_len)
2152 {
2153 struct ib_uverbs_destroy_srq cmd;
2154 struct ib_uverbs_destroy_srq_resp resp;
2155 struct ib_uobject *uobj;
2156 struct ib_srq *srq;
2157 struct ib_uevent_object *obj;
2158 int ret = -EINVAL;
2159
2160 if (copy_from_user(&cmd, buf, sizeof cmd))
2161 return -EFAULT;
2162
2163 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2164 if (!uobj)
2165 return -EINVAL;
2166 srq = uobj->object;
2167 obj = container_of(uobj, struct ib_uevent_object, uobject);
2168
2169 ret = ib_destroy_srq(srq);
2170 if (!ret)
2171 uobj->live = 0;
2172
2173 put_uobj_write(uobj);
2174
2175 if (ret)
2176 return ret;
2177
2178 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2179
2180 mutex_lock(&file->mutex);
2181 list_del(&uobj->list);
2182 mutex_unlock(&file->mutex);
2183
2184 ib_uverbs_release_uevent(file, obj);
2185
2186 memset(&resp, 0, sizeof resp);
2187 resp.events_reported = obj->events_reported;
2188
2189 put_uobj(uobj);
2190
2191 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2192 &resp, sizeof resp))
2193 ret = -EFAULT;
2194
2195 return ret ? ret : in_len;
2196 }
linux-next