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Pull battery into release branch
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / core / uverbs_cmd.c
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 * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
36 */
37
38 #include <linux/file.h>
39 #include <linux/fs.h>
40
41 #include <asm/uaccess.h>
42
43 #include "uverbs.h"
44
45 static struct lock_class_key pd_lock_key;
46 static struct lock_class_key mr_lock_key;
47 static struct lock_class_key cq_lock_key;
48 static struct lock_class_key qp_lock_key;
49 static struct lock_class_key ah_lock_key;
50 static struct lock_class_key srq_lock_key;
51
52 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
53 do { \
54 (udata)->inbuf = (void __user *) (ibuf); \
55 (udata)->outbuf = (void __user *) (obuf); \
56 (udata)->inlen = (ilen); \
57 (udata)->outlen = (olen); \
58 } while (0)
59
60 /*
61 * The ib_uobject locking scheme is as follows:
62 *
63 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
64 * needs to be held during all idr operations. When an object is
65 * looked up, a reference must be taken on the object's kref before
66 * dropping this lock.
67 *
68 * - Each object also has an rwsem. This rwsem must be held for
69 * reading while an operation that uses the object is performed.
70 * For example, while registering an MR, the associated PD's
71 * uobject.mutex must be held for reading. The rwsem must be held
72 * for writing while initializing or destroying an object.
73 *
74 * - In addition, each object has a "live" flag. If this flag is not
75 * set, then lookups of the object will fail even if it is found in
76 * the idr. This handles a reader that blocks and does not acquire
77 * the rwsem until after the object is destroyed. The destroy
78 * operation will set the live flag to 0 and then drop the rwsem;
79 * this will allow the reader to acquire the rwsem, see that the
80 * live flag is 0, and then drop the rwsem and its reference to
81 * object. The underlying storage will not be freed until the last
82 * reference to the object is dropped.
83 */
84
85 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
86 struct ib_ucontext *context, struct lock_class_key *key)
87 {
88 uobj->user_handle = user_handle;
89 uobj->context = context;
90 kref_init(&uobj->ref);
91 init_rwsem(&uobj->mutex);
92 lockdep_set_class(&uobj->mutex, key);
93 uobj->live = 0;
94 }
95
96 static void release_uobj(struct kref *kref)
97 {
98 kfree(container_of(kref, struct ib_uobject, ref));
99 }
100
101 static void put_uobj(struct ib_uobject *uobj)
102 {
103 kref_put(&uobj->ref, release_uobj);
104 }
105
106 static void put_uobj_read(struct ib_uobject *uobj)
107 {
108 up_read(&uobj->mutex);
109 put_uobj(uobj);
110 }
111
112 static void put_uobj_write(struct ib_uobject *uobj)
113 {
114 up_write(&uobj->mutex);
115 put_uobj(uobj);
116 }
117
118 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
119 {
120 int ret;
121
122 retry:
123 if (!idr_pre_get(idr, GFP_KERNEL))
124 return -ENOMEM;
125
126 spin_lock(&ib_uverbs_idr_lock);
127 ret = idr_get_new(idr, uobj, &uobj->id);
128 spin_unlock(&ib_uverbs_idr_lock);
129
130 if (ret == -EAGAIN)
131 goto retry;
132
133 return ret;
134 }
135
136 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
137 {
138 spin_lock(&ib_uverbs_idr_lock);
139 idr_remove(idr, uobj->id);
140 spin_unlock(&ib_uverbs_idr_lock);
141 }
142
143 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
144 struct ib_ucontext *context)
145 {
146 struct ib_uobject *uobj;
147
148 spin_lock(&ib_uverbs_idr_lock);
149 uobj = idr_find(idr, id);
150 if (uobj)
151 kref_get(&uobj->ref);
152 spin_unlock(&ib_uverbs_idr_lock);
153
154 return uobj;
155 }
156
157 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
158 struct ib_ucontext *context, int nested)
159 {
160 struct ib_uobject *uobj;
161
162 uobj = __idr_get_uobj(idr, id, context);
163 if (!uobj)
164 return NULL;
165
166 if (nested)
167 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
168 else
169 down_read(&uobj->mutex);
170 if (!uobj->live) {
171 put_uobj_read(uobj);
172 return NULL;
173 }
174
175 return uobj;
176 }
177
178 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
179 struct ib_ucontext *context)
180 {
181 struct ib_uobject *uobj;
182
183 uobj = __idr_get_uobj(idr, id, context);
184 if (!uobj)
185 return NULL;
186
187 down_write(&uobj->mutex);
188 if (!uobj->live) {
189 put_uobj_write(uobj);
190 return NULL;
191 }
192
193 return uobj;
194 }
195
196 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
197 int nested)
198 {
199 struct ib_uobject *uobj;
200
201 uobj = idr_read_uobj(idr, id, context, nested);
202 return uobj ? uobj->object : NULL;
203 }
204
205 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
206 {
207 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
208 }
209
210 static void put_pd_read(struct ib_pd *pd)
211 {
212 put_uobj_read(pd->uobject);
213 }
214
215 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
216 {
217 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
218 }
219
220 static void put_cq_read(struct ib_cq *cq)
221 {
222 put_uobj_read(cq->uobject);
223 }
224
225 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
226 {
227 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
228 }
229
230 static void put_ah_read(struct ib_ah *ah)
231 {
232 put_uobj_read(ah->uobject);
233 }
234
235 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
236 {
237 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
238 }
239
240 static void put_qp_read(struct ib_qp *qp)
241 {
242 put_uobj_read(qp->uobject);
243 }
244
245 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
246 {
247 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
248 }
249
250 static void put_srq_read(struct ib_srq *srq)
251 {
252 put_uobj_read(srq->uobject);
253 }
254
255 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
256 const char __user *buf,
257 int in_len, int out_len)
258 {
259 struct ib_uverbs_get_context cmd;
260 struct ib_uverbs_get_context_resp resp;
261 struct ib_udata udata;
262 struct ib_device *ibdev = file->device->ib_dev;
263 struct ib_ucontext *ucontext;
264 struct file *filp;
265 int ret;
266
267 if (out_len < sizeof resp)
268 return -ENOSPC;
269
270 if (copy_from_user(&cmd, buf, sizeof cmd))
271 return -EFAULT;
272
273 mutex_lock(&file->mutex);
274
275 if (file->ucontext) {
276 ret = -EINVAL;
277 goto err;
278 }
279
280 INIT_UDATA(&udata, buf + sizeof cmd,
281 (unsigned long) cmd.response + sizeof resp,
282 in_len - sizeof cmd, out_len - sizeof resp);
283
284 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
285 if (IS_ERR(ucontext)) {
286 ret = PTR_ERR(file->ucontext);
287 goto err;
288 }
289
290 ucontext->device = ibdev;
291 INIT_LIST_HEAD(&ucontext->pd_list);
292 INIT_LIST_HEAD(&ucontext->mr_list);
293 INIT_LIST_HEAD(&ucontext->mw_list);
294 INIT_LIST_HEAD(&ucontext->cq_list);
295 INIT_LIST_HEAD(&ucontext->qp_list);
296 INIT_LIST_HEAD(&ucontext->srq_list);
297 INIT_LIST_HEAD(&ucontext->ah_list);
298 ucontext->closing = 0;
299
300 resp.num_comp_vectors = file->device->num_comp_vectors;
301
302 filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
303 if (IS_ERR(filp)) {
304 ret = PTR_ERR(filp);
305 goto err_free;
306 }
307
308 if (copy_to_user((void __user *) (unsigned long) cmd.response,
309 &resp, sizeof resp)) {
310 ret = -EFAULT;
311 goto err_file;
312 }
313
314 file->async_file = filp->private_data;
315
316 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
317 ib_uverbs_event_handler);
318 ret = ib_register_event_handler(&file->event_handler);
319 if (ret)
320 goto err_file;
321
322 kref_get(&file->async_file->ref);
323 kref_get(&file->ref);
324 file->ucontext = ucontext;
325
326 fd_install(resp.async_fd, filp);
327
328 mutex_unlock(&file->mutex);
329
330 return in_len;
331
332 err_file:
333 put_unused_fd(resp.async_fd);
334 fput(filp);
335
336 err_free:
337 ibdev->dealloc_ucontext(ucontext);
338
339 err:
340 mutex_unlock(&file->mutex);
341 return ret;
342 }
343
344 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
345 const char __user *buf,
346 int in_len, int out_len)
347 {
348 struct ib_uverbs_query_device cmd;
349 struct ib_uverbs_query_device_resp resp;
350 struct ib_device_attr attr;
351 int ret;
352
353 if (out_len < sizeof resp)
354 return -ENOSPC;
355
356 if (copy_from_user(&cmd, buf, sizeof cmd))
357 return -EFAULT;
358
359 ret = ib_query_device(file->device->ib_dev, &attr);
360 if (ret)
361 return ret;
362
363 memset(&resp, 0, sizeof resp);
364
365 resp.fw_ver = attr.fw_ver;
366 resp.node_guid = file->device->ib_dev->node_guid;
367 resp.sys_image_guid = attr.sys_image_guid;
368 resp.max_mr_size = attr.max_mr_size;
369 resp.page_size_cap = attr.page_size_cap;
370 resp.vendor_id = attr.vendor_id;
371 resp.vendor_part_id = attr.vendor_part_id;
372 resp.hw_ver = attr.hw_ver;
373 resp.max_qp = attr.max_qp;
374 resp.max_qp_wr = attr.max_qp_wr;
375 resp.device_cap_flags = attr.device_cap_flags;
376 resp.max_sge = attr.max_sge;
377 resp.max_sge_rd = attr.max_sge_rd;
378 resp.max_cq = attr.max_cq;
379 resp.max_cqe = attr.max_cqe;
380 resp.max_mr = attr.max_mr;
381 resp.max_pd = attr.max_pd;
382 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
383 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
384 resp.max_res_rd_atom = attr.max_res_rd_atom;
385 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
386 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
387 resp.atomic_cap = attr.atomic_cap;
388 resp.max_ee = attr.max_ee;
389 resp.max_rdd = attr.max_rdd;
390 resp.max_mw = attr.max_mw;
391 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
392 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
393 resp.max_mcast_grp = attr.max_mcast_grp;
394 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
395 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
396 resp.max_ah = attr.max_ah;
397 resp.max_fmr = attr.max_fmr;
398 resp.max_map_per_fmr = attr.max_map_per_fmr;
399 resp.max_srq = attr.max_srq;
400 resp.max_srq_wr = attr.max_srq_wr;
401 resp.max_srq_sge = attr.max_srq_sge;
402 resp.max_pkeys = attr.max_pkeys;
403 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
404 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
405
406 if (copy_to_user((void __user *) (unsigned long) cmd.response,
407 &resp, sizeof resp))
408 return -EFAULT;
409
410 return in_len;
411 }
412
413 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
414 const char __user *buf,
415 int in_len, int out_len)
416 {
417 struct ib_uverbs_query_port cmd;
418 struct ib_uverbs_query_port_resp resp;
419 struct ib_port_attr attr;
420 int ret;
421
422 if (out_len < sizeof resp)
423 return -ENOSPC;
424
425 if (copy_from_user(&cmd, buf, sizeof cmd))
426 return -EFAULT;
427
428 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
429 if (ret)
430 return ret;
431
432 memset(&resp, 0, sizeof resp);
433
434 resp.state = attr.state;
435 resp.max_mtu = attr.max_mtu;
436 resp.active_mtu = attr.active_mtu;
437 resp.gid_tbl_len = attr.gid_tbl_len;
438 resp.port_cap_flags = attr.port_cap_flags;
439 resp.max_msg_sz = attr.max_msg_sz;
440 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
441 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
442 resp.pkey_tbl_len = attr.pkey_tbl_len;
443 resp.lid = attr.lid;
444 resp.sm_lid = attr.sm_lid;
445 resp.lmc = attr.lmc;
446 resp.max_vl_num = attr.max_vl_num;
447 resp.sm_sl = attr.sm_sl;
448 resp.subnet_timeout = attr.subnet_timeout;
449 resp.init_type_reply = attr.init_type_reply;
450 resp.active_width = attr.active_width;
451 resp.active_speed = attr.active_speed;
452 resp.phys_state = attr.phys_state;
453
454 if (copy_to_user((void __user *) (unsigned long) cmd.response,
455 &resp, sizeof resp))
456 return -EFAULT;
457
458 return in_len;
459 }
460
461 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
462 const char __user *buf,
463 int in_len, int out_len)
464 {
465 struct ib_uverbs_alloc_pd cmd;
466 struct ib_uverbs_alloc_pd_resp resp;
467 struct ib_udata udata;
468 struct ib_uobject *uobj;
469 struct ib_pd *pd;
470 int ret;
471
472 if (out_len < sizeof resp)
473 return -ENOSPC;
474
475 if (copy_from_user(&cmd, buf, sizeof cmd))
476 return -EFAULT;
477
478 INIT_UDATA(&udata, buf + sizeof cmd,
479 (unsigned long) cmd.response + sizeof resp,
480 in_len - sizeof cmd, out_len - sizeof resp);
481
482 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
483 if (!uobj)
484 return -ENOMEM;
485
486 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
487 down_write(&uobj->mutex);
488
489 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
490 file->ucontext, &udata);
491 if (IS_ERR(pd)) {
492 ret = PTR_ERR(pd);
493 goto err;
494 }
495
496 pd->device = file->device->ib_dev;
497 pd->uobject = uobj;
498 atomic_set(&pd->usecnt, 0);
499
500 uobj->object = pd;
501 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
502 if (ret)
503 goto err_idr;
504
505 memset(&resp, 0, sizeof resp);
506 resp.pd_handle = uobj->id;
507
508 if (copy_to_user((void __user *) (unsigned long) cmd.response,
509 &resp, sizeof resp)) {
510 ret = -EFAULT;
511 goto err_copy;
512 }
513
514 mutex_lock(&file->mutex);
515 list_add_tail(&uobj->list, &file->ucontext->pd_list);
516 mutex_unlock(&file->mutex);
517
518 uobj->live = 1;
519
520 up_write(&uobj->mutex);
521
522 return in_len;
523
524 err_copy:
525 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
526
527 err_idr:
528 ib_dealloc_pd(pd);
529
530 err:
531 put_uobj_write(uobj);
532 return ret;
533 }
534
535 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
536 const char __user *buf,
537 int in_len, int out_len)
538 {
539 struct ib_uverbs_dealloc_pd cmd;
540 struct ib_uobject *uobj;
541 int ret;
542
543 if (copy_from_user(&cmd, buf, sizeof cmd))
544 return -EFAULT;
545
546 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
547 if (!uobj)
548 return -EINVAL;
549
550 ret = ib_dealloc_pd(uobj->object);
551 if (!ret)
552 uobj->live = 0;
553
554 put_uobj_write(uobj);
555
556 if (ret)
557 return ret;
558
559 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
560
561 mutex_lock(&file->mutex);
562 list_del(&uobj->list);
563 mutex_unlock(&file->mutex);
564
565 put_uobj(uobj);
566
567 return in_len;
568 }
569
570 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
571 const char __user *buf, int in_len,
572 int out_len)
573 {
574 struct ib_uverbs_reg_mr cmd;
575 struct ib_uverbs_reg_mr_resp resp;
576 struct ib_udata udata;
577 struct ib_uobject *uobj;
578 struct ib_pd *pd;
579 struct ib_mr *mr;
580 int ret;
581
582 if (out_len < sizeof resp)
583 return -ENOSPC;
584
585 if (copy_from_user(&cmd, buf, sizeof cmd))
586 return -EFAULT;
587
588 INIT_UDATA(&udata, buf + sizeof cmd,
589 (unsigned long) cmd.response + sizeof resp,
590 in_len - sizeof cmd, out_len - sizeof resp);
591
592 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
593 return -EINVAL;
594
595 /*
596 * Local write permission is required if remote write or
597 * remote atomic permission is also requested.
598 */
599 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
600 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
601 return -EINVAL;
602
603 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
604 if (!uobj)
605 return -ENOMEM;
606
607 init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
608 down_write(&uobj->mutex);
609
610 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
611 if (!pd) {
612 ret = -EINVAL;
613 goto err_free;
614 }
615
616 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
617 cmd.access_flags, &udata);
618 if (IS_ERR(mr)) {
619 ret = PTR_ERR(mr);
620 goto err_put;
621 }
622
623 mr->device = pd->device;
624 mr->pd = pd;
625 mr->uobject = uobj;
626 atomic_inc(&pd->usecnt);
627 atomic_set(&mr->usecnt, 0);
628
629 uobj->object = mr;
630 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
631 if (ret)
632 goto err_unreg;
633
634 memset(&resp, 0, sizeof resp);
635 resp.lkey = mr->lkey;
636 resp.rkey = mr->rkey;
637 resp.mr_handle = uobj->id;
638
639 if (copy_to_user((void __user *) (unsigned long) cmd.response,
640 &resp, sizeof resp)) {
641 ret = -EFAULT;
642 goto err_copy;
643 }
644
645 put_pd_read(pd);
646
647 mutex_lock(&file->mutex);
648 list_add_tail(&uobj->list, &file->ucontext->mr_list);
649 mutex_unlock(&file->mutex);
650
651 uobj->live = 1;
652
653 up_write(&uobj->mutex);
654
655 return in_len;
656
657 err_copy:
658 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
659
660 err_unreg:
661 ib_dereg_mr(mr);
662
663 err_put:
664 put_pd_read(pd);
665
666 err_free:
667 put_uobj_write(uobj);
668 return ret;
669 }
670
671 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
672 const char __user *buf, int in_len,
673 int out_len)
674 {
675 struct ib_uverbs_dereg_mr cmd;
676 struct ib_mr *mr;
677 struct ib_uobject *uobj;
678 int ret = -EINVAL;
679
680 if (copy_from_user(&cmd, buf, sizeof cmd))
681 return -EFAULT;
682
683 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
684 if (!uobj)
685 return -EINVAL;
686
687 mr = uobj->object;
688
689 ret = ib_dereg_mr(mr);
690 if (!ret)
691 uobj->live = 0;
692
693 put_uobj_write(uobj);
694
695 if (ret)
696 return ret;
697
698 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
699
700 mutex_lock(&file->mutex);
701 list_del(&uobj->list);
702 mutex_unlock(&file->mutex);
703
704 put_uobj(uobj);
705
706 return in_len;
707 }
708
709 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
710 const char __user *buf, int in_len,
711 int out_len)
712 {
713 struct ib_uverbs_create_comp_channel cmd;
714 struct ib_uverbs_create_comp_channel_resp resp;
715 struct file *filp;
716
717 if (out_len < sizeof resp)
718 return -ENOSPC;
719
720 if (copy_from_user(&cmd, buf, sizeof cmd))
721 return -EFAULT;
722
723 filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
724 if (IS_ERR(filp))
725 return PTR_ERR(filp);
726
727 if (copy_to_user((void __user *) (unsigned long) cmd.response,
728 &resp, sizeof resp)) {
729 put_unused_fd(resp.fd);
730 fput(filp);
731 return -EFAULT;
732 }
733
734 fd_install(resp.fd, filp);
735 return in_len;
736 }
737
738 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
739 const char __user *buf, int in_len,
740 int out_len)
741 {
742 struct ib_uverbs_create_cq cmd;
743 struct ib_uverbs_create_cq_resp resp;
744 struct ib_udata udata;
745 struct ib_ucq_object *obj;
746 struct ib_uverbs_event_file *ev_file = NULL;
747 struct ib_cq *cq;
748 int ret;
749
750 if (out_len < sizeof resp)
751 return -ENOSPC;
752
753 if (copy_from_user(&cmd, buf, sizeof cmd))
754 return -EFAULT;
755
756 INIT_UDATA(&udata, buf + sizeof cmd,
757 (unsigned long) cmd.response + sizeof resp,
758 in_len - sizeof cmd, out_len - sizeof resp);
759
760 if (cmd.comp_vector >= file->device->num_comp_vectors)
761 return -EINVAL;
762
763 obj = kmalloc(sizeof *obj, GFP_KERNEL);
764 if (!obj)
765 return -ENOMEM;
766
767 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
768 down_write(&obj->uobject.mutex);
769
770 if (cmd.comp_channel >= 0) {
771 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
772 if (!ev_file) {
773 ret = -EINVAL;
774 goto err;
775 }
776 }
777
778 obj->uverbs_file = file;
779 obj->comp_events_reported = 0;
780 obj->async_events_reported = 0;
781 INIT_LIST_HEAD(&obj->comp_list);
782 INIT_LIST_HEAD(&obj->async_list);
783
784 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
785 cmd.comp_vector,
786 file->ucontext, &udata);
787 if (IS_ERR(cq)) {
788 ret = PTR_ERR(cq);
789 goto err_file;
790 }
791
792 cq->device = file->device->ib_dev;
793 cq->uobject = &obj->uobject;
794 cq->comp_handler = ib_uverbs_comp_handler;
795 cq->event_handler = ib_uverbs_cq_event_handler;
796 cq->cq_context = ev_file;
797 atomic_set(&cq->usecnt, 0);
798
799 obj->uobject.object = cq;
800 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
801 if (ret)
802 goto err_free;
803
804 memset(&resp, 0, sizeof resp);
805 resp.cq_handle = obj->uobject.id;
806 resp.cqe = cq->cqe;
807
808 if (copy_to_user((void __user *) (unsigned long) cmd.response,
809 &resp, sizeof resp)) {
810 ret = -EFAULT;
811 goto err_copy;
812 }
813
814 mutex_lock(&file->mutex);
815 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
816 mutex_unlock(&file->mutex);
817
818 obj->uobject.live = 1;
819
820 up_write(&obj->uobject.mutex);
821
822 return in_len;
823
824 err_copy:
825 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
826
827 err_free:
828 ib_destroy_cq(cq);
829
830 err_file:
831 if (ev_file)
832 ib_uverbs_release_ucq(file, ev_file, obj);
833
834 err:
835 put_uobj_write(&obj->uobject);
836 return ret;
837 }
838
839 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
840 const char __user *buf, int in_len,
841 int out_len)
842 {
843 struct ib_uverbs_resize_cq cmd;
844 struct ib_uverbs_resize_cq_resp resp;
845 struct ib_udata udata;
846 struct ib_cq *cq;
847 int ret = -EINVAL;
848
849 if (copy_from_user(&cmd, buf, sizeof cmd))
850 return -EFAULT;
851
852 INIT_UDATA(&udata, buf + sizeof cmd,
853 (unsigned long) cmd.response + sizeof resp,
854 in_len - sizeof cmd, out_len - sizeof resp);
855
856 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
857 if (!cq)
858 return -EINVAL;
859
860 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
861 if (ret)
862 goto out;
863
864 resp.cqe = cq->cqe;
865
866 if (copy_to_user((void __user *) (unsigned long) cmd.response,
867 &resp, sizeof resp.cqe))
868 ret = -EFAULT;
869
870 out:
871 put_cq_read(cq);
872
873 return ret ? ret : in_len;
874 }
875
876 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
877 const char __user *buf, int in_len,
878 int out_len)
879 {
880 struct ib_uverbs_poll_cq cmd;
881 struct ib_uverbs_poll_cq_resp *resp;
882 struct ib_cq *cq;
883 struct ib_wc *wc;
884 int ret = 0;
885 int i;
886 int rsize;
887
888 if (copy_from_user(&cmd, buf, sizeof cmd))
889 return -EFAULT;
890
891 wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
892 if (!wc)
893 return -ENOMEM;
894
895 rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
896 resp = kmalloc(rsize, GFP_KERNEL);
897 if (!resp) {
898 ret = -ENOMEM;
899 goto out_wc;
900 }
901
902 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
903 if (!cq) {
904 ret = -EINVAL;
905 goto out;
906 }
907
908 resp->count = ib_poll_cq(cq, cmd.ne, wc);
909
910 put_cq_read(cq);
911
912 for (i = 0; i < resp->count; i++) {
913 resp->wc[i].wr_id = wc[i].wr_id;
914 resp->wc[i].status = wc[i].status;
915 resp->wc[i].opcode = wc[i].opcode;
916 resp->wc[i].vendor_err = wc[i].vendor_err;
917 resp->wc[i].byte_len = wc[i].byte_len;
918 resp->wc[i].imm_data = (__u32 __force) wc[i].imm_data;
919 resp->wc[i].qp_num = wc[i].qp->qp_num;
920 resp->wc[i].src_qp = wc[i].src_qp;
921 resp->wc[i].wc_flags = wc[i].wc_flags;
922 resp->wc[i].pkey_index = wc[i].pkey_index;
923 resp->wc[i].slid = wc[i].slid;
924 resp->wc[i].sl = wc[i].sl;
925 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
926 resp->wc[i].port_num = wc[i].port_num;
927 }
928
929 if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
930 ret = -EFAULT;
931
932 out:
933 kfree(resp);
934
935 out_wc:
936 kfree(wc);
937 return ret ? ret : in_len;
938 }
939
940 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
941 const char __user *buf, int in_len,
942 int out_len)
943 {
944 struct ib_uverbs_req_notify_cq cmd;
945 struct ib_cq *cq;
946
947 if (copy_from_user(&cmd, buf, sizeof cmd))
948 return -EFAULT;
949
950 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
951 if (!cq)
952 return -EINVAL;
953
954 ib_req_notify_cq(cq, cmd.solicited_only ?
955 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
956
957 put_cq_read(cq);
958
959 return in_len;
960 }
961
962 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
963 const char __user *buf, int in_len,
964 int out_len)
965 {
966 struct ib_uverbs_destroy_cq cmd;
967 struct ib_uverbs_destroy_cq_resp resp;
968 struct ib_uobject *uobj;
969 struct ib_cq *cq;
970 struct ib_ucq_object *obj;
971 struct ib_uverbs_event_file *ev_file;
972 int ret = -EINVAL;
973
974 if (copy_from_user(&cmd, buf, sizeof cmd))
975 return -EFAULT;
976
977 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
978 if (!uobj)
979 return -EINVAL;
980 cq = uobj->object;
981 ev_file = cq->cq_context;
982 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
983
984 ret = ib_destroy_cq(cq);
985 if (!ret)
986 uobj->live = 0;
987
988 put_uobj_write(uobj);
989
990 if (ret)
991 return ret;
992
993 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
994
995 mutex_lock(&file->mutex);
996 list_del(&uobj->list);
997 mutex_unlock(&file->mutex);
998
999 ib_uverbs_release_ucq(file, ev_file, obj);
1000
1001 memset(&resp, 0, sizeof resp);
1002 resp.comp_events_reported = obj->comp_events_reported;
1003 resp.async_events_reported = obj->async_events_reported;
1004
1005 put_uobj(uobj);
1006
1007 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1008 &resp, sizeof resp))
1009 return -EFAULT;
1010
1011 return in_len;
1012 }
1013
1014 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1015 const char __user *buf, int in_len,
1016 int out_len)
1017 {
1018 struct ib_uverbs_create_qp cmd;
1019 struct ib_uverbs_create_qp_resp resp;
1020 struct ib_udata udata;
1021 struct ib_uqp_object *obj;
1022 struct ib_pd *pd;
1023 struct ib_cq *scq, *rcq;
1024 struct ib_srq *srq;
1025 struct ib_qp *qp;
1026 struct ib_qp_init_attr attr;
1027 int ret;
1028
1029 if (out_len < sizeof resp)
1030 return -ENOSPC;
1031
1032 if (copy_from_user(&cmd, buf, sizeof cmd))
1033 return -EFAULT;
1034
1035 INIT_UDATA(&udata, buf + sizeof cmd,
1036 (unsigned long) cmd.response + sizeof resp,
1037 in_len - sizeof cmd, out_len - sizeof resp);
1038
1039 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1040 if (!obj)
1041 return -ENOMEM;
1042
1043 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1044 down_write(&obj->uevent.uobject.mutex);
1045
1046 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1047 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1048 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1049 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1050 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1051
1052 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1053 ret = -EINVAL;
1054 goto err_put;
1055 }
1056
1057 attr.event_handler = ib_uverbs_qp_event_handler;
1058 attr.qp_context = file;
1059 attr.send_cq = scq;
1060 attr.recv_cq = rcq;
1061 attr.srq = srq;
1062 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1063 attr.qp_type = cmd.qp_type;
1064
1065 attr.cap.max_send_wr = cmd.max_send_wr;
1066 attr.cap.max_recv_wr = cmd.max_recv_wr;
1067 attr.cap.max_send_sge = cmd.max_send_sge;
1068 attr.cap.max_recv_sge = cmd.max_recv_sge;
1069 attr.cap.max_inline_data = cmd.max_inline_data;
1070
1071 obj->uevent.events_reported = 0;
1072 INIT_LIST_HEAD(&obj->uevent.event_list);
1073 INIT_LIST_HEAD(&obj->mcast_list);
1074
1075 qp = pd->device->create_qp(pd, &attr, &udata);
1076 if (IS_ERR(qp)) {
1077 ret = PTR_ERR(qp);
1078 goto err_put;
1079 }
1080
1081 qp->device = pd->device;
1082 qp->pd = pd;
1083 qp->send_cq = attr.send_cq;
1084 qp->recv_cq = attr.recv_cq;
1085 qp->srq = attr.srq;
1086 qp->uobject = &obj->uevent.uobject;
1087 qp->event_handler = attr.event_handler;
1088 qp->qp_context = attr.qp_context;
1089 qp->qp_type = attr.qp_type;
1090 atomic_inc(&pd->usecnt);
1091 atomic_inc(&attr.send_cq->usecnt);
1092 atomic_inc(&attr.recv_cq->usecnt);
1093 if (attr.srq)
1094 atomic_inc(&attr.srq->usecnt);
1095
1096 obj->uevent.uobject.object = qp;
1097 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1098 if (ret)
1099 goto err_destroy;
1100
1101 memset(&resp, 0, sizeof resp);
1102 resp.qpn = qp->qp_num;
1103 resp.qp_handle = obj->uevent.uobject.id;
1104 resp.max_recv_sge = attr.cap.max_recv_sge;
1105 resp.max_send_sge = attr.cap.max_send_sge;
1106 resp.max_recv_wr = attr.cap.max_recv_wr;
1107 resp.max_send_wr = attr.cap.max_send_wr;
1108 resp.max_inline_data = attr.cap.max_inline_data;
1109
1110 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1111 &resp, sizeof resp)) {
1112 ret = -EFAULT;
1113 goto err_copy;
1114 }
1115
1116 put_pd_read(pd);
1117 put_cq_read(scq);
1118 if (rcq != scq)
1119 put_cq_read(rcq);
1120 if (srq)
1121 put_srq_read(srq);
1122
1123 mutex_lock(&file->mutex);
1124 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1125 mutex_unlock(&file->mutex);
1126
1127 obj->uevent.uobject.live = 1;
1128
1129 up_write(&obj->uevent.uobject.mutex);
1130
1131 return in_len;
1132
1133 err_copy:
1134 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1135
1136 err_destroy:
1137 ib_destroy_qp(qp);
1138
1139 err_put:
1140 if (pd)
1141 put_pd_read(pd);
1142 if (scq)
1143 put_cq_read(scq);
1144 if (rcq && rcq != scq)
1145 put_cq_read(rcq);
1146 if (srq)
1147 put_srq_read(srq);
1148
1149 put_uobj_write(&obj->uevent.uobject);
1150 return ret;
1151 }
1152
1153 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1154 const char __user *buf, int in_len,
1155 int out_len)
1156 {
1157 struct ib_uverbs_query_qp cmd;
1158 struct ib_uverbs_query_qp_resp resp;
1159 struct ib_qp *qp;
1160 struct ib_qp_attr *attr;
1161 struct ib_qp_init_attr *init_attr;
1162 int ret;
1163
1164 if (copy_from_user(&cmd, buf, sizeof cmd))
1165 return -EFAULT;
1166
1167 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1168 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1169 if (!attr || !init_attr) {
1170 ret = -ENOMEM;
1171 goto out;
1172 }
1173
1174 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1175 if (!qp) {
1176 ret = -EINVAL;
1177 goto out;
1178 }
1179
1180 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1181
1182 put_qp_read(qp);
1183
1184 if (ret)
1185 goto out;
1186
1187 memset(&resp, 0, sizeof resp);
1188
1189 resp.qp_state = attr->qp_state;
1190 resp.cur_qp_state = attr->cur_qp_state;
1191 resp.path_mtu = attr->path_mtu;
1192 resp.path_mig_state = attr->path_mig_state;
1193 resp.qkey = attr->qkey;
1194 resp.rq_psn = attr->rq_psn;
1195 resp.sq_psn = attr->sq_psn;
1196 resp.dest_qp_num = attr->dest_qp_num;
1197 resp.qp_access_flags = attr->qp_access_flags;
1198 resp.pkey_index = attr->pkey_index;
1199 resp.alt_pkey_index = attr->alt_pkey_index;
1200 resp.sq_draining = attr->sq_draining;
1201 resp.max_rd_atomic = attr->max_rd_atomic;
1202 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1203 resp.min_rnr_timer = attr->min_rnr_timer;
1204 resp.port_num = attr->port_num;
1205 resp.timeout = attr->timeout;
1206 resp.retry_cnt = attr->retry_cnt;
1207 resp.rnr_retry = attr->rnr_retry;
1208 resp.alt_port_num = attr->alt_port_num;
1209 resp.alt_timeout = attr->alt_timeout;
1210
1211 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1212 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1213 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1214 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1215 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1216 resp.dest.dlid = attr->ah_attr.dlid;
1217 resp.dest.sl = attr->ah_attr.sl;
1218 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1219 resp.dest.static_rate = attr->ah_attr.static_rate;
1220 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1221 resp.dest.port_num = attr->ah_attr.port_num;
1222
1223 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1224 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1225 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1226 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1227 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1228 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1229 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1230 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1231 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1232 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1233 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1234
1235 resp.max_send_wr = init_attr->cap.max_send_wr;
1236 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1237 resp.max_send_sge = init_attr->cap.max_send_sge;
1238 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1239 resp.max_inline_data = init_attr->cap.max_inline_data;
1240 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1241
1242 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1243 &resp, sizeof resp))
1244 ret = -EFAULT;
1245
1246 out:
1247 kfree(attr);
1248 kfree(init_attr);
1249
1250 return ret ? ret : in_len;
1251 }
1252
1253 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1254 const char __user *buf, int in_len,
1255 int out_len)
1256 {
1257 struct ib_uverbs_modify_qp cmd;
1258 struct ib_udata udata;
1259 struct ib_qp *qp;
1260 struct ib_qp_attr *attr;
1261 int ret;
1262
1263 if (copy_from_user(&cmd, buf, sizeof cmd))
1264 return -EFAULT;
1265
1266 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1267 out_len);
1268
1269 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1270 if (!attr)
1271 return -ENOMEM;
1272
1273 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1274 if (!qp) {
1275 ret = -EINVAL;
1276 goto out;
1277 }
1278
1279 attr->qp_state = cmd.qp_state;
1280 attr->cur_qp_state = cmd.cur_qp_state;
1281 attr->path_mtu = cmd.path_mtu;
1282 attr->path_mig_state = cmd.path_mig_state;
1283 attr->qkey = cmd.qkey;
1284 attr->rq_psn = cmd.rq_psn;
1285 attr->sq_psn = cmd.sq_psn;
1286 attr->dest_qp_num = cmd.dest_qp_num;
1287 attr->qp_access_flags = cmd.qp_access_flags;
1288 attr->pkey_index = cmd.pkey_index;
1289 attr->alt_pkey_index = cmd.alt_pkey_index;
1290 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1291 attr->max_rd_atomic = cmd.max_rd_atomic;
1292 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1293 attr->min_rnr_timer = cmd.min_rnr_timer;
1294 attr->port_num = cmd.port_num;
1295 attr->timeout = cmd.timeout;
1296 attr->retry_cnt = cmd.retry_cnt;
1297 attr->rnr_retry = cmd.rnr_retry;
1298 attr->alt_port_num = cmd.alt_port_num;
1299 attr->alt_timeout = cmd.alt_timeout;
1300
1301 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1302 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1303 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1304 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1305 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1306 attr->ah_attr.dlid = cmd.dest.dlid;
1307 attr->ah_attr.sl = cmd.dest.sl;
1308 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1309 attr->ah_attr.static_rate = cmd.dest.static_rate;
1310 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1311 attr->ah_attr.port_num = cmd.dest.port_num;
1312
1313 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1314 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1315 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1316 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1317 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1318 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1319 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1320 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1321 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1322 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1323 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1324
1325 ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1326
1327 put_qp_read(qp);
1328
1329 if (ret)
1330 goto out;
1331
1332 ret = in_len;
1333
1334 out:
1335 kfree(attr);
1336
1337 return ret;
1338 }
1339
1340 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1341 const char __user *buf, int in_len,
1342 int out_len)
1343 {
1344 struct ib_uverbs_destroy_qp cmd;
1345 struct ib_uverbs_destroy_qp_resp resp;
1346 struct ib_uobject *uobj;
1347 struct ib_qp *qp;
1348 struct ib_uqp_object *obj;
1349 int ret = -EINVAL;
1350
1351 if (copy_from_user(&cmd, buf, sizeof cmd))
1352 return -EFAULT;
1353
1354 memset(&resp, 0, sizeof resp);
1355
1356 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1357 if (!uobj)
1358 return -EINVAL;
1359 qp = uobj->object;
1360 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1361
1362 if (!list_empty(&obj->mcast_list)) {
1363 put_uobj_write(uobj);
1364 return -EBUSY;
1365 }
1366
1367 ret = ib_destroy_qp(qp);
1368 if (!ret)
1369 uobj->live = 0;
1370
1371 put_uobj_write(uobj);
1372
1373 if (ret)
1374 return ret;
1375
1376 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1377
1378 mutex_lock(&file->mutex);
1379 list_del(&uobj->list);
1380 mutex_unlock(&file->mutex);
1381
1382 ib_uverbs_release_uevent(file, &obj->uevent);
1383
1384 resp.events_reported = obj->uevent.events_reported;
1385
1386 put_uobj(uobj);
1387
1388 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1389 &resp, sizeof resp))
1390 return -EFAULT;
1391
1392 return in_len;
1393 }
1394
1395 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1396 const char __user *buf, int in_len,
1397 int out_len)
1398 {
1399 struct ib_uverbs_post_send cmd;
1400 struct ib_uverbs_post_send_resp resp;
1401 struct ib_uverbs_send_wr *user_wr;
1402 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1403 struct ib_qp *qp;
1404 int i, sg_ind;
1405 int is_ud;
1406 ssize_t ret = -EINVAL;
1407
1408 if (copy_from_user(&cmd, buf, sizeof cmd))
1409 return -EFAULT;
1410
1411 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1412 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1413 return -EINVAL;
1414
1415 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1416 return -EINVAL;
1417
1418 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1419 if (!user_wr)
1420 return -ENOMEM;
1421
1422 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1423 if (!qp)
1424 goto out;
1425
1426 is_ud = qp->qp_type == IB_QPT_UD;
1427 sg_ind = 0;
1428 last = NULL;
1429 for (i = 0; i < cmd.wr_count; ++i) {
1430 if (copy_from_user(user_wr,
1431 buf + sizeof cmd + i * cmd.wqe_size,
1432 cmd.wqe_size)) {
1433 ret = -EFAULT;
1434 goto out_put;
1435 }
1436
1437 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1438 ret = -EINVAL;
1439 goto out_put;
1440 }
1441
1442 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1443 user_wr->num_sge * sizeof (struct ib_sge),
1444 GFP_KERNEL);
1445 if (!next) {
1446 ret = -ENOMEM;
1447 goto out_put;
1448 }
1449
1450 if (!last)
1451 wr = next;
1452 else
1453 last->next = next;
1454 last = next;
1455
1456 next->next = NULL;
1457 next->wr_id = user_wr->wr_id;
1458 next->num_sge = user_wr->num_sge;
1459 next->opcode = user_wr->opcode;
1460 next->send_flags = user_wr->send_flags;
1461 next->imm_data = (__be32 __force) user_wr->imm_data;
1462
1463 if (is_ud) {
1464 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1465 file->ucontext);
1466 if (!next->wr.ud.ah) {
1467 ret = -EINVAL;
1468 goto out_put;
1469 }
1470 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1471 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1472 } else {
1473 switch (next->opcode) {
1474 case IB_WR_RDMA_WRITE:
1475 case IB_WR_RDMA_WRITE_WITH_IMM:
1476 case IB_WR_RDMA_READ:
1477 next->wr.rdma.remote_addr =
1478 user_wr->wr.rdma.remote_addr;
1479 next->wr.rdma.rkey =
1480 user_wr->wr.rdma.rkey;
1481 break;
1482 case IB_WR_ATOMIC_CMP_AND_SWP:
1483 case IB_WR_ATOMIC_FETCH_AND_ADD:
1484 next->wr.atomic.remote_addr =
1485 user_wr->wr.atomic.remote_addr;
1486 next->wr.atomic.compare_add =
1487 user_wr->wr.atomic.compare_add;
1488 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1489 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1490 break;
1491 default:
1492 break;
1493 }
1494 }
1495
1496 if (next->num_sge) {
1497 next->sg_list = (void *) next +
1498 ALIGN(sizeof *next, sizeof (struct ib_sge));
1499 if (copy_from_user(next->sg_list,
1500 buf + sizeof cmd +
1501 cmd.wr_count * cmd.wqe_size +
1502 sg_ind * sizeof (struct ib_sge),
1503 next->num_sge * sizeof (struct ib_sge))) {
1504 ret = -EFAULT;
1505 goto out_put;
1506 }
1507 sg_ind += next->num_sge;
1508 } else
1509 next->sg_list = NULL;
1510 }
1511
1512 resp.bad_wr = 0;
1513 ret = qp->device->post_send(qp, wr, &bad_wr);
1514 if (ret)
1515 for (next = wr; next; next = next->next) {
1516 ++resp.bad_wr;
1517 if (next == bad_wr)
1518 break;
1519 }
1520
1521 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1522 &resp, sizeof resp))
1523 ret = -EFAULT;
1524
1525 out_put:
1526 put_qp_read(qp);
1527
1528 while (wr) {
1529 if (is_ud && wr->wr.ud.ah)
1530 put_ah_read(wr->wr.ud.ah);
1531 next = wr->next;
1532 kfree(wr);
1533 wr = next;
1534 }
1535
1536 out:
1537 kfree(user_wr);
1538
1539 return ret ? ret : in_len;
1540 }
1541
1542 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1543 int in_len,
1544 u32 wr_count,
1545 u32 sge_count,
1546 u32 wqe_size)
1547 {
1548 struct ib_uverbs_recv_wr *user_wr;
1549 struct ib_recv_wr *wr = NULL, *last, *next;
1550 int sg_ind;
1551 int i;
1552 int ret;
1553
1554 if (in_len < wqe_size * wr_count +
1555 sge_count * sizeof (struct ib_uverbs_sge))
1556 return ERR_PTR(-EINVAL);
1557
1558 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1559 return ERR_PTR(-EINVAL);
1560
1561 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1562 if (!user_wr)
1563 return ERR_PTR(-ENOMEM);
1564
1565 sg_ind = 0;
1566 last = NULL;
1567 for (i = 0; i < wr_count; ++i) {
1568 if (copy_from_user(user_wr, buf + i * wqe_size,
1569 wqe_size)) {
1570 ret = -EFAULT;
1571 goto err;
1572 }
1573
1574 if (user_wr->num_sge + sg_ind > sge_count) {
1575 ret = -EINVAL;
1576 goto err;
1577 }
1578
1579 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1580 user_wr->num_sge * sizeof (struct ib_sge),
1581 GFP_KERNEL);
1582 if (!next) {
1583 ret = -ENOMEM;
1584 goto err;
1585 }
1586
1587 if (!last)
1588 wr = next;
1589 else
1590 last->next = next;
1591 last = next;
1592
1593 next->next = NULL;
1594 next->wr_id = user_wr->wr_id;
1595 next->num_sge = user_wr->num_sge;
1596
1597 if (next->num_sge) {
1598 next->sg_list = (void *) next +
1599 ALIGN(sizeof *next, sizeof (struct ib_sge));
1600 if (copy_from_user(next->sg_list,
1601 buf + wr_count * wqe_size +
1602 sg_ind * sizeof (struct ib_sge),
1603 next->num_sge * sizeof (struct ib_sge))) {
1604 ret = -EFAULT;
1605 goto err;
1606 }
1607 sg_ind += next->num_sge;
1608 } else
1609 next->sg_list = NULL;
1610 }
1611
1612 kfree(user_wr);
1613 return wr;
1614
1615 err:
1616 kfree(user_wr);
1617
1618 while (wr) {
1619 next = wr->next;
1620 kfree(wr);
1621 wr = next;
1622 }
1623
1624 return ERR_PTR(ret);
1625 }
1626
1627 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1628 const char __user *buf, int in_len,
1629 int out_len)
1630 {
1631 struct ib_uverbs_post_recv cmd;
1632 struct ib_uverbs_post_recv_resp resp;
1633 struct ib_recv_wr *wr, *next, *bad_wr;
1634 struct ib_qp *qp;
1635 ssize_t ret = -EINVAL;
1636
1637 if (copy_from_user(&cmd, buf, sizeof cmd))
1638 return -EFAULT;
1639
1640 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1641 in_len - sizeof cmd, cmd.wr_count,
1642 cmd.sge_count, cmd.wqe_size);
1643 if (IS_ERR(wr))
1644 return PTR_ERR(wr);
1645
1646 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1647 if (!qp)
1648 goto out;
1649
1650 resp.bad_wr = 0;
1651 ret = qp->device->post_recv(qp, wr, &bad_wr);
1652
1653 put_qp_read(qp);
1654
1655 if (ret)
1656 for (next = wr; next; next = next->next) {
1657 ++resp.bad_wr;
1658 if (next == bad_wr)
1659 break;
1660 }
1661
1662 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1663 &resp, sizeof resp))
1664 ret = -EFAULT;
1665
1666 out:
1667 while (wr) {
1668 next = wr->next;
1669 kfree(wr);
1670 wr = next;
1671 }
1672
1673 return ret ? ret : in_len;
1674 }
1675
1676 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1677 const char __user *buf, int in_len,
1678 int out_len)
1679 {
1680 struct ib_uverbs_post_srq_recv cmd;
1681 struct ib_uverbs_post_srq_recv_resp resp;
1682 struct ib_recv_wr *wr, *next, *bad_wr;
1683 struct ib_srq *srq;
1684 ssize_t ret = -EINVAL;
1685
1686 if (copy_from_user(&cmd, buf, sizeof cmd))
1687 return -EFAULT;
1688
1689 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1690 in_len - sizeof cmd, cmd.wr_count,
1691 cmd.sge_count, cmd.wqe_size);
1692 if (IS_ERR(wr))
1693 return PTR_ERR(wr);
1694
1695 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1696 if (!srq)
1697 goto out;
1698
1699 resp.bad_wr = 0;
1700 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1701
1702 put_srq_read(srq);
1703
1704 if (ret)
1705 for (next = wr; next; next = next->next) {
1706 ++resp.bad_wr;
1707 if (next == bad_wr)
1708 break;
1709 }
1710
1711 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1712 &resp, sizeof resp))
1713 ret = -EFAULT;
1714
1715 out:
1716 while (wr) {
1717 next = wr->next;
1718 kfree(wr);
1719 wr = next;
1720 }
1721
1722 return ret ? ret : in_len;
1723 }
1724
1725 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1726 const char __user *buf, int in_len,
1727 int out_len)
1728 {
1729 struct ib_uverbs_create_ah cmd;
1730 struct ib_uverbs_create_ah_resp resp;
1731 struct ib_uobject *uobj;
1732 struct ib_pd *pd;
1733 struct ib_ah *ah;
1734 struct ib_ah_attr attr;
1735 int ret;
1736
1737 if (out_len < sizeof resp)
1738 return -ENOSPC;
1739
1740 if (copy_from_user(&cmd, buf, sizeof cmd))
1741 return -EFAULT;
1742
1743 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1744 if (!uobj)
1745 return -ENOMEM;
1746
1747 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1748 down_write(&uobj->mutex);
1749
1750 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1751 if (!pd) {
1752 ret = -EINVAL;
1753 goto err;
1754 }
1755
1756 attr.dlid = cmd.attr.dlid;
1757 attr.sl = cmd.attr.sl;
1758 attr.src_path_bits = cmd.attr.src_path_bits;
1759 attr.static_rate = cmd.attr.static_rate;
1760 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
1761 attr.port_num = cmd.attr.port_num;
1762 attr.grh.flow_label = cmd.attr.grh.flow_label;
1763 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1764 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1765 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1766 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1767
1768 ah = ib_create_ah(pd, &attr);
1769 if (IS_ERR(ah)) {
1770 ret = PTR_ERR(ah);
1771 goto err_put;
1772 }
1773
1774 ah->uobject = uobj;
1775 uobj->object = ah;
1776
1777 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1778 if (ret)
1779 goto err_destroy;
1780
1781 resp.ah_handle = uobj->id;
1782
1783 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1784 &resp, sizeof resp)) {
1785 ret = -EFAULT;
1786 goto err_copy;
1787 }
1788
1789 put_pd_read(pd);
1790
1791 mutex_lock(&file->mutex);
1792 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1793 mutex_unlock(&file->mutex);
1794
1795 uobj->live = 1;
1796
1797 up_write(&uobj->mutex);
1798
1799 return in_len;
1800
1801 err_copy:
1802 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1803
1804 err_destroy:
1805 ib_destroy_ah(ah);
1806
1807 err_put:
1808 put_pd_read(pd);
1809
1810 err:
1811 put_uobj_write(uobj);
1812 return ret;
1813 }
1814
1815 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1816 const char __user *buf, int in_len, int out_len)
1817 {
1818 struct ib_uverbs_destroy_ah cmd;
1819 struct ib_ah *ah;
1820 struct ib_uobject *uobj;
1821 int ret;
1822
1823 if (copy_from_user(&cmd, buf, sizeof cmd))
1824 return -EFAULT;
1825
1826 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1827 if (!uobj)
1828 return -EINVAL;
1829 ah = uobj->object;
1830
1831 ret = ib_destroy_ah(ah);
1832 if (!ret)
1833 uobj->live = 0;
1834
1835 put_uobj_write(uobj);
1836
1837 if (ret)
1838 return ret;
1839
1840 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1841
1842 mutex_lock(&file->mutex);
1843 list_del(&uobj->list);
1844 mutex_unlock(&file->mutex);
1845
1846 put_uobj(uobj);
1847
1848 return in_len;
1849 }
1850
1851 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1852 const char __user *buf, int in_len,
1853 int out_len)
1854 {
1855 struct ib_uverbs_attach_mcast cmd;
1856 struct ib_qp *qp;
1857 struct ib_uqp_object *obj;
1858 struct ib_uverbs_mcast_entry *mcast;
1859 int ret;
1860
1861 if (copy_from_user(&cmd, buf, sizeof cmd))
1862 return -EFAULT;
1863
1864 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1865 if (!qp)
1866 return -EINVAL;
1867
1868 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1869
1870 list_for_each_entry(mcast, &obj->mcast_list, list)
1871 if (cmd.mlid == mcast->lid &&
1872 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1873 ret = 0;
1874 goto out_put;
1875 }
1876
1877 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1878 if (!mcast) {
1879 ret = -ENOMEM;
1880 goto out_put;
1881 }
1882
1883 mcast->lid = cmd.mlid;
1884 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1885
1886 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1887 if (!ret)
1888 list_add_tail(&mcast->list, &obj->mcast_list);
1889 else
1890 kfree(mcast);
1891
1892 out_put:
1893 put_qp_read(qp);
1894
1895 return ret ? ret : in_len;
1896 }
1897
1898 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1899 const char __user *buf, int in_len,
1900 int out_len)
1901 {
1902 struct ib_uverbs_detach_mcast cmd;
1903 struct ib_uqp_object *obj;
1904 struct ib_qp *qp;
1905 struct ib_uverbs_mcast_entry *mcast;
1906 int ret = -EINVAL;
1907
1908 if (copy_from_user(&cmd, buf, sizeof cmd))
1909 return -EFAULT;
1910
1911 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1912 if (!qp)
1913 return -EINVAL;
1914
1915 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1916 if (ret)
1917 goto out_put;
1918
1919 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1920
1921 list_for_each_entry(mcast, &obj->mcast_list, list)
1922 if (cmd.mlid == mcast->lid &&
1923 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1924 list_del(&mcast->list);
1925 kfree(mcast);
1926 break;
1927 }
1928
1929 out_put:
1930 put_qp_read(qp);
1931
1932 return ret ? ret : in_len;
1933 }
1934
1935 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1936 const char __user *buf, int in_len,
1937 int out_len)
1938 {
1939 struct ib_uverbs_create_srq cmd;
1940 struct ib_uverbs_create_srq_resp resp;
1941 struct ib_udata udata;
1942 struct ib_uevent_object *obj;
1943 struct ib_pd *pd;
1944 struct ib_srq *srq;
1945 struct ib_srq_init_attr attr;
1946 int ret;
1947
1948 if (out_len < sizeof resp)
1949 return -ENOSPC;
1950
1951 if (copy_from_user(&cmd, buf, sizeof cmd))
1952 return -EFAULT;
1953
1954 INIT_UDATA(&udata, buf + sizeof cmd,
1955 (unsigned long) cmd.response + sizeof resp,
1956 in_len - sizeof cmd, out_len - sizeof resp);
1957
1958 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1959 if (!obj)
1960 return -ENOMEM;
1961
1962 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1963 down_write(&obj->uobject.mutex);
1964
1965 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1966 if (!pd) {
1967 ret = -EINVAL;
1968 goto err;
1969 }
1970
1971 attr.event_handler = ib_uverbs_srq_event_handler;
1972 attr.srq_context = file;
1973 attr.attr.max_wr = cmd.max_wr;
1974 attr.attr.max_sge = cmd.max_sge;
1975 attr.attr.srq_limit = cmd.srq_limit;
1976
1977 obj->events_reported = 0;
1978 INIT_LIST_HEAD(&obj->event_list);
1979
1980 srq = pd->device->create_srq(pd, &attr, &udata);
1981 if (IS_ERR(srq)) {
1982 ret = PTR_ERR(srq);
1983 goto err_put;
1984 }
1985
1986 srq->device = pd->device;
1987 srq->pd = pd;
1988 srq->uobject = &obj->uobject;
1989 srq->event_handler = attr.event_handler;
1990 srq->srq_context = attr.srq_context;
1991 atomic_inc(&pd->usecnt);
1992 atomic_set(&srq->usecnt, 0);
1993
1994 obj->uobject.object = srq;
1995 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
1996 if (ret)
1997 goto err_destroy;
1998
1999 memset(&resp, 0, sizeof resp);
2000 resp.srq_handle = obj->uobject.id;
2001 resp.max_wr = attr.attr.max_wr;
2002 resp.max_sge = attr.attr.max_sge;
2003
2004 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2005 &resp, sizeof resp)) {
2006 ret = -EFAULT;
2007 goto err_copy;
2008 }
2009
2010 put_pd_read(pd);
2011
2012 mutex_lock(&file->mutex);
2013 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2014 mutex_unlock(&file->mutex);
2015
2016 obj->uobject.live = 1;
2017
2018 up_write(&obj->uobject.mutex);
2019
2020 return in_len;
2021
2022 err_copy:
2023 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2024
2025 err_destroy:
2026 ib_destroy_srq(srq);
2027
2028 err_put:
2029 put_pd_read(pd);
2030
2031 err:
2032 put_uobj_write(&obj->uobject);
2033 return ret;
2034 }
2035
2036 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2037 const char __user *buf, int in_len,
2038 int out_len)
2039 {
2040 struct ib_uverbs_modify_srq cmd;
2041 struct ib_udata udata;
2042 struct ib_srq *srq;
2043 struct ib_srq_attr attr;
2044 int ret;
2045
2046 if (copy_from_user(&cmd, buf, sizeof cmd))
2047 return -EFAULT;
2048
2049 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2050 out_len);
2051
2052 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2053 if (!srq)
2054 return -EINVAL;
2055
2056 attr.max_wr = cmd.max_wr;
2057 attr.srq_limit = cmd.srq_limit;
2058
2059 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2060
2061 put_srq_read(srq);
2062
2063 return ret ? ret : in_len;
2064 }
2065
2066 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2067 const char __user *buf,
2068 int in_len, int out_len)
2069 {
2070 struct ib_uverbs_query_srq cmd;
2071 struct ib_uverbs_query_srq_resp resp;
2072 struct ib_srq_attr attr;
2073 struct ib_srq *srq;
2074 int ret;
2075
2076 if (out_len < sizeof resp)
2077 return -ENOSPC;
2078
2079 if (copy_from_user(&cmd, buf, sizeof cmd))
2080 return -EFAULT;
2081
2082 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2083 if (!srq)
2084 return -EINVAL;
2085
2086 ret = ib_query_srq(srq, &attr);
2087
2088 put_srq_read(srq);
2089
2090 if (ret)
2091 return ret;
2092
2093 memset(&resp, 0, sizeof resp);
2094
2095 resp.max_wr = attr.max_wr;
2096 resp.max_sge = attr.max_sge;
2097 resp.srq_limit = attr.srq_limit;
2098
2099 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2100 &resp, sizeof resp))
2101 return -EFAULT;
2102
2103 return in_len;
2104 }
2105
2106 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2107 const char __user *buf, int in_len,
2108 int out_len)
2109 {
2110 struct ib_uverbs_destroy_srq cmd;
2111 struct ib_uverbs_destroy_srq_resp resp;
2112 struct ib_uobject *uobj;
2113 struct ib_srq *srq;
2114 struct ib_uevent_object *obj;
2115 int ret = -EINVAL;
2116
2117 if (copy_from_user(&cmd, buf, sizeof cmd))
2118 return -EFAULT;
2119
2120 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2121 if (!uobj)
2122 return -EINVAL;
2123 srq = uobj->object;
2124 obj = container_of(uobj, struct ib_uevent_object, uobject);
2125
2126 ret = ib_destroy_srq(srq);
2127 if (!ret)
2128 uobj->live = 0;
2129
2130 put_uobj_write(uobj);
2131
2132 if (ret)
2133 return ret;
2134
2135 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2136
2137 mutex_lock(&file->mutex);
2138 list_del(&uobj->list);
2139 mutex_unlock(&file->mutex);
2140
2141 ib_uverbs_release_uevent(file, obj);
2142
2143 memset(&resp, 0, sizeof resp);
2144 resp.events_reported = obj->events_reported;
2145
2146 put_uobj(uobj);
2147
2148 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2149 &resp, sizeof resp))
2150 ret = -EFAULT;
2151
2152 return ret ? ret : in_len;
2153 }
kernel source for telekom puls (alcatel/mediatek)