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IB/uverbs: Fix lockdep warning when QP is created with 2 CQs
[deliverable/linux.git] / drivers / infiniband / core / uverbs_cmd.c
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006 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
299 resp.num_comp_vectors = file->device->num_comp_vectors;
300
301 filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
302 if (IS_ERR(filp)) {
303 ret = PTR_ERR(filp);
304 goto err_free;
305 }
306
307 if (copy_to_user((void __user *) (unsigned long) cmd.response,
308 &resp, sizeof resp)) {
309 ret = -EFAULT;
310 goto err_file;
311 }
312
313 file->async_file = filp->private_data;
314
315 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
316 ib_uverbs_event_handler);
317 ret = ib_register_event_handler(&file->event_handler);
318 if (ret)
319 goto err_file;
320
321 kref_get(&file->async_file->ref);
322 kref_get(&file->ref);
323 file->ucontext = ucontext;
324
325 fd_install(resp.async_fd, filp);
326
327 mutex_unlock(&file->mutex);
328
329 return in_len;
330
331 err_file:
332 put_unused_fd(resp.async_fd);
333 fput(filp);
334
335 err_free:
336 ibdev->dealloc_ucontext(ucontext);
337
338 err:
339 mutex_unlock(&file->mutex);
340 return ret;
341 }
342
343 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
344 const char __user *buf,
345 int in_len, int out_len)
346 {
347 struct ib_uverbs_query_device cmd;
348 struct ib_uverbs_query_device_resp resp;
349 struct ib_device_attr attr;
350 int ret;
351
352 if (out_len < sizeof resp)
353 return -ENOSPC;
354
355 if (copy_from_user(&cmd, buf, sizeof cmd))
356 return -EFAULT;
357
358 ret = ib_query_device(file->device->ib_dev, &attr);
359 if (ret)
360 return ret;
361
362 memset(&resp, 0, sizeof resp);
363
364 resp.fw_ver = attr.fw_ver;
365 resp.node_guid = file->device->ib_dev->node_guid;
366 resp.sys_image_guid = attr.sys_image_guid;
367 resp.max_mr_size = attr.max_mr_size;
368 resp.page_size_cap = attr.page_size_cap;
369 resp.vendor_id = attr.vendor_id;
370 resp.vendor_part_id = attr.vendor_part_id;
371 resp.hw_ver = attr.hw_ver;
372 resp.max_qp = attr.max_qp;
373 resp.max_qp_wr = attr.max_qp_wr;
374 resp.device_cap_flags = attr.device_cap_flags;
375 resp.max_sge = attr.max_sge;
376 resp.max_sge_rd = attr.max_sge_rd;
377 resp.max_cq = attr.max_cq;
378 resp.max_cqe = attr.max_cqe;
379 resp.max_mr = attr.max_mr;
380 resp.max_pd = attr.max_pd;
381 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
382 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
383 resp.max_res_rd_atom = attr.max_res_rd_atom;
384 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
385 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
386 resp.atomic_cap = attr.atomic_cap;
387 resp.max_ee = attr.max_ee;
388 resp.max_rdd = attr.max_rdd;
389 resp.max_mw = attr.max_mw;
390 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
391 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
392 resp.max_mcast_grp = attr.max_mcast_grp;
393 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
394 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
395 resp.max_ah = attr.max_ah;
396 resp.max_fmr = attr.max_fmr;
397 resp.max_map_per_fmr = attr.max_map_per_fmr;
398 resp.max_srq = attr.max_srq;
399 resp.max_srq_wr = attr.max_srq_wr;
400 resp.max_srq_sge = attr.max_srq_sge;
401 resp.max_pkeys = attr.max_pkeys;
402 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
403 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
404
405 if (copy_to_user((void __user *) (unsigned long) cmd.response,
406 &resp, sizeof resp))
407 return -EFAULT;
408
409 return in_len;
410 }
411
412 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
413 const char __user *buf,
414 int in_len, int out_len)
415 {
416 struct ib_uverbs_query_port cmd;
417 struct ib_uverbs_query_port_resp resp;
418 struct ib_port_attr attr;
419 int ret;
420
421 if (out_len < sizeof resp)
422 return -ENOSPC;
423
424 if (copy_from_user(&cmd, buf, sizeof cmd))
425 return -EFAULT;
426
427 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
428 if (ret)
429 return ret;
430
431 memset(&resp, 0, sizeof resp);
432
433 resp.state = attr.state;
434 resp.max_mtu = attr.max_mtu;
435 resp.active_mtu = attr.active_mtu;
436 resp.gid_tbl_len = attr.gid_tbl_len;
437 resp.port_cap_flags = attr.port_cap_flags;
438 resp.max_msg_sz = attr.max_msg_sz;
439 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
440 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
441 resp.pkey_tbl_len = attr.pkey_tbl_len;
442 resp.lid = attr.lid;
443 resp.sm_lid = attr.sm_lid;
444 resp.lmc = attr.lmc;
445 resp.max_vl_num = attr.max_vl_num;
446 resp.sm_sl = attr.sm_sl;
447 resp.subnet_timeout = attr.subnet_timeout;
448 resp.init_type_reply = attr.init_type_reply;
449 resp.active_width = attr.active_width;
450 resp.active_speed = attr.active_speed;
451 resp.phys_state = attr.phys_state;
452
453 if (copy_to_user((void __user *) (unsigned long) cmd.response,
454 &resp, sizeof resp))
455 return -EFAULT;
456
457 return in_len;
458 }
459
460 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
461 const char __user *buf,
462 int in_len, int out_len)
463 {
464 struct ib_uverbs_alloc_pd cmd;
465 struct ib_uverbs_alloc_pd_resp resp;
466 struct ib_udata udata;
467 struct ib_uobject *uobj;
468 struct ib_pd *pd;
469 int ret;
470
471 if (out_len < sizeof resp)
472 return -ENOSPC;
473
474 if (copy_from_user(&cmd, buf, sizeof cmd))
475 return -EFAULT;
476
477 INIT_UDATA(&udata, buf + sizeof cmd,
478 (unsigned long) cmd.response + sizeof resp,
479 in_len - sizeof cmd, out_len - sizeof resp);
480
481 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
482 if (!uobj)
483 return -ENOMEM;
484
485 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
486 down_write(&uobj->mutex);
487
488 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
489 file->ucontext, &udata);
490 if (IS_ERR(pd)) {
491 ret = PTR_ERR(pd);
492 goto err;
493 }
494
495 pd->device = file->device->ib_dev;
496 pd->uobject = uobj;
497 atomic_set(&pd->usecnt, 0);
498
499 uobj->object = pd;
500 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
501 if (ret)
502 goto err_idr;
503
504 memset(&resp, 0, sizeof resp);
505 resp.pd_handle = uobj->id;
506
507 if (copy_to_user((void __user *) (unsigned long) cmd.response,
508 &resp, sizeof resp)) {
509 ret = -EFAULT;
510 goto err_copy;
511 }
512
513 mutex_lock(&file->mutex);
514 list_add_tail(&uobj->list, &file->ucontext->pd_list);
515 mutex_unlock(&file->mutex);
516
517 uobj->live = 1;
518
519 up_write(&uobj->mutex);
520
521 return in_len;
522
523 err_copy:
524 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
525
526 err_idr:
527 ib_dealloc_pd(pd);
528
529 err:
530 put_uobj_write(uobj);
531 return ret;
532 }
533
534 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
535 const char __user *buf,
536 int in_len, int out_len)
537 {
538 struct ib_uverbs_dealloc_pd cmd;
539 struct ib_uobject *uobj;
540 int ret;
541
542 if (copy_from_user(&cmd, buf, sizeof cmd))
543 return -EFAULT;
544
545 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
546 if (!uobj)
547 return -EINVAL;
548
549 ret = ib_dealloc_pd(uobj->object);
550 if (!ret)
551 uobj->live = 0;
552
553 put_uobj_write(uobj);
554
555 if (ret)
556 return ret;
557
558 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
559
560 mutex_lock(&file->mutex);
561 list_del(&uobj->list);
562 mutex_unlock(&file->mutex);
563
564 put_uobj(uobj);
565
566 return in_len;
567 }
568
569 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
570 const char __user *buf, int in_len,
571 int out_len)
572 {
573 struct ib_uverbs_reg_mr cmd;
574 struct ib_uverbs_reg_mr_resp resp;
575 struct ib_udata udata;
576 struct ib_umem_object *obj;
577 struct ib_pd *pd;
578 struct ib_mr *mr;
579 int ret;
580
581 if (out_len < sizeof resp)
582 return -ENOSPC;
583
584 if (copy_from_user(&cmd, buf, sizeof cmd))
585 return -EFAULT;
586
587 INIT_UDATA(&udata, buf + sizeof cmd,
588 (unsigned long) cmd.response + sizeof resp,
589 in_len - sizeof cmd, out_len - sizeof resp);
590
591 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
592 return -EINVAL;
593
594 /*
595 * Local write permission is required if remote write or
596 * remote atomic permission is also requested.
597 */
598 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
599 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
600 return -EINVAL;
601
602 obj = kmalloc(sizeof *obj, GFP_KERNEL);
603 if (!obj)
604 return -ENOMEM;
605
606 init_uobj(&obj->uobject, 0, file->ucontext, &mr_lock_key);
607 down_write(&obj->uobject.mutex);
608
609 /*
610 * We ask for writable memory if any access flags other than
611 * "remote read" are set. "Local write" and "remote write"
612 * obviously require write access. "Remote atomic" can do
613 * things like fetch and add, which will modify memory, and
614 * "MW bind" can change permissions by binding a window.
615 */
616 ret = ib_umem_get(file->device->ib_dev, &obj->umem,
617 (void *) (unsigned long) cmd.start, cmd.length,
618 !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ));
619 if (ret)
620 goto err_free;
621
622 obj->umem.virt_base = cmd.hca_va;
623
624 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
625 if (!pd)
626 goto err_release;
627
628 mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata);
629 if (IS_ERR(mr)) {
630 ret = PTR_ERR(mr);
631 goto err_put;
632 }
633
634 mr->device = pd->device;
635 mr->pd = pd;
636 mr->uobject = &obj->uobject;
637 atomic_inc(&pd->usecnt);
638 atomic_set(&mr->usecnt, 0);
639
640 obj->uobject.object = mr;
641 ret = idr_add_uobj(&ib_uverbs_mr_idr, &obj->uobject);
642 if (ret)
643 goto err_unreg;
644
645 memset(&resp, 0, sizeof resp);
646 resp.lkey = mr->lkey;
647 resp.rkey = mr->rkey;
648 resp.mr_handle = obj->uobject.id;
649
650 if (copy_to_user((void __user *) (unsigned long) cmd.response,
651 &resp, sizeof resp)) {
652 ret = -EFAULT;
653 goto err_copy;
654 }
655
656 put_pd_read(pd);
657
658 mutex_lock(&file->mutex);
659 list_add_tail(&obj->uobject.list, &file->ucontext->mr_list);
660 mutex_unlock(&file->mutex);
661
662 obj->uobject.live = 1;
663
664 up_write(&obj->uobject.mutex);
665
666 return in_len;
667
668 err_copy:
669 idr_remove_uobj(&ib_uverbs_mr_idr, &obj->uobject);
670
671 err_unreg:
672 ib_dereg_mr(mr);
673
674 err_put:
675 put_pd_read(pd);
676
677 err_release:
678 ib_umem_release(file->device->ib_dev, &obj->umem);
679
680 err_free:
681 put_uobj_write(&obj->uobject);
682 return ret;
683 }
684
685 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
686 const char __user *buf, int in_len,
687 int out_len)
688 {
689 struct ib_uverbs_dereg_mr cmd;
690 struct ib_mr *mr;
691 struct ib_uobject *uobj;
692 struct ib_umem_object *memobj;
693 int ret = -EINVAL;
694
695 if (copy_from_user(&cmd, buf, sizeof cmd))
696 return -EFAULT;
697
698 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
699 if (!uobj)
700 return -EINVAL;
701
702 memobj = container_of(uobj, struct ib_umem_object, uobject);
703 mr = uobj->object;
704
705 ret = ib_dereg_mr(mr);
706 if (!ret)
707 uobj->live = 0;
708
709 put_uobj_write(uobj);
710
711 if (ret)
712 return ret;
713
714 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
715
716 mutex_lock(&file->mutex);
717 list_del(&uobj->list);
718 mutex_unlock(&file->mutex);
719
720 ib_umem_release(file->device->ib_dev, &memobj->umem);
721
722 put_uobj(uobj);
723
724 return in_len;
725 }
726
727 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
728 const char __user *buf, int in_len,
729 int out_len)
730 {
731 struct ib_uverbs_create_comp_channel cmd;
732 struct ib_uverbs_create_comp_channel_resp resp;
733 struct file *filp;
734
735 if (out_len < sizeof resp)
736 return -ENOSPC;
737
738 if (copy_from_user(&cmd, buf, sizeof cmd))
739 return -EFAULT;
740
741 filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
742 if (IS_ERR(filp))
743 return PTR_ERR(filp);
744
745 if (copy_to_user((void __user *) (unsigned long) cmd.response,
746 &resp, sizeof resp)) {
747 put_unused_fd(resp.fd);
748 fput(filp);
749 return -EFAULT;
750 }
751
752 fd_install(resp.fd, filp);
753 return in_len;
754 }
755
756 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
757 const char __user *buf, int in_len,
758 int out_len)
759 {
760 struct ib_uverbs_create_cq cmd;
761 struct ib_uverbs_create_cq_resp resp;
762 struct ib_udata udata;
763 struct ib_ucq_object *obj;
764 struct ib_uverbs_event_file *ev_file = NULL;
765 struct ib_cq *cq;
766 int ret;
767
768 if (out_len < sizeof resp)
769 return -ENOSPC;
770
771 if (copy_from_user(&cmd, buf, sizeof cmd))
772 return -EFAULT;
773
774 INIT_UDATA(&udata, buf + sizeof cmd,
775 (unsigned long) cmd.response + sizeof resp,
776 in_len - sizeof cmd, out_len - sizeof resp);
777
778 if (cmd.comp_vector >= file->device->num_comp_vectors)
779 return -EINVAL;
780
781 obj = kmalloc(sizeof *obj, GFP_KERNEL);
782 if (!obj)
783 return -ENOMEM;
784
785 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
786 down_write(&obj->uobject.mutex);
787
788 if (cmd.comp_channel >= 0) {
789 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
790 if (!ev_file) {
791 ret = -EINVAL;
792 goto err;
793 }
794 }
795
796 obj->uverbs_file = file;
797 obj->comp_events_reported = 0;
798 obj->async_events_reported = 0;
799 INIT_LIST_HEAD(&obj->comp_list);
800 INIT_LIST_HEAD(&obj->async_list);
801
802 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
803 file->ucontext, &udata);
804 if (IS_ERR(cq)) {
805 ret = PTR_ERR(cq);
806 goto err_file;
807 }
808
809 cq->device = file->device->ib_dev;
810 cq->uobject = &obj->uobject;
811 cq->comp_handler = ib_uverbs_comp_handler;
812 cq->event_handler = ib_uverbs_cq_event_handler;
813 cq->cq_context = ev_file;
814 atomic_set(&cq->usecnt, 0);
815
816 obj->uobject.object = cq;
817 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
818 if (ret)
819 goto err_free;
820
821 memset(&resp, 0, sizeof resp);
822 resp.cq_handle = obj->uobject.id;
823 resp.cqe = cq->cqe;
824
825 if (copy_to_user((void __user *) (unsigned long) cmd.response,
826 &resp, sizeof resp)) {
827 ret = -EFAULT;
828 goto err_copy;
829 }
830
831 mutex_lock(&file->mutex);
832 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
833 mutex_unlock(&file->mutex);
834
835 obj->uobject.live = 1;
836
837 up_write(&obj->uobject.mutex);
838
839 return in_len;
840
841 err_copy:
842 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
843
844
845 err_free:
846 ib_destroy_cq(cq);
847
848 err_file:
849 if (ev_file)
850 ib_uverbs_release_ucq(file, ev_file, obj);
851
852 err:
853 put_uobj_write(&obj->uobject);
854 return ret;
855 }
856
857 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
858 const char __user *buf, int in_len,
859 int out_len)
860 {
861 struct ib_uverbs_resize_cq cmd;
862 struct ib_uverbs_resize_cq_resp resp;
863 struct ib_udata udata;
864 struct ib_cq *cq;
865 int ret = -EINVAL;
866
867 if (copy_from_user(&cmd, buf, sizeof cmd))
868 return -EFAULT;
869
870 INIT_UDATA(&udata, buf + sizeof cmd,
871 (unsigned long) cmd.response + sizeof resp,
872 in_len - sizeof cmd, out_len - sizeof resp);
873
874 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
875 if (!cq)
876 return -EINVAL;
877
878 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
879 if (ret)
880 goto out;
881
882 memset(&resp, 0, sizeof resp);
883 resp.cqe = cq->cqe;
884
885 if (copy_to_user((void __user *) (unsigned long) cmd.response,
886 &resp, sizeof resp))
887 ret = -EFAULT;
888
889 out:
890 put_cq_read(cq);
891
892 return ret ? ret : in_len;
893 }
894
895 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
896 const char __user *buf, int in_len,
897 int out_len)
898 {
899 struct ib_uverbs_poll_cq cmd;
900 struct ib_uverbs_poll_cq_resp *resp;
901 struct ib_cq *cq;
902 struct ib_wc *wc;
903 int ret = 0;
904 int i;
905 int rsize;
906
907 if (copy_from_user(&cmd, buf, sizeof cmd))
908 return -EFAULT;
909
910 wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
911 if (!wc)
912 return -ENOMEM;
913
914 rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
915 resp = kmalloc(rsize, GFP_KERNEL);
916 if (!resp) {
917 ret = -ENOMEM;
918 goto out_wc;
919 }
920
921 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
922 if (!cq) {
923 ret = -EINVAL;
924 goto out;
925 }
926
927 resp->count = ib_poll_cq(cq, cmd.ne, wc);
928
929 put_cq_read(cq);
930
931 for (i = 0; i < resp->count; i++) {
932 resp->wc[i].wr_id = wc[i].wr_id;
933 resp->wc[i].status = wc[i].status;
934 resp->wc[i].opcode = wc[i].opcode;
935 resp->wc[i].vendor_err = wc[i].vendor_err;
936 resp->wc[i].byte_len = wc[i].byte_len;
937 resp->wc[i].imm_data = (__u32 __force) wc[i].imm_data;
938 resp->wc[i].qp_num = wc[i].qp_num;
939 resp->wc[i].src_qp = wc[i].src_qp;
940 resp->wc[i].wc_flags = wc[i].wc_flags;
941 resp->wc[i].pkey_index = wc[i].pkey_index;
942 resp->wc[i].slid = wc[i].slid;
943 resp->wc[i].sl = wc[i].sl;
944 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
945 resp->wc[i].port_num = wc[i].port_num;
946 }
947
948 if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
949 ret = -EFAULT;
950
951 out:
952 kfree(resp);
953
954 out_wc:
955 kfree(wc);
956 return ret ? ret : in_len;
957 }
958
959 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
960 const char __user *buf, int in_len,
961 int out_len)
962 {
963 struct ib_uverbs_req_notify_cq cmd;
964 struct ib_cq *cq;
965
966 if (copy_from_user(&cmd, buf, sizeof cmd))
967 return -EFAULT;
968
969 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
970 if (!cq)
971 return -EINVAL;
972
973 ib_req_notify_cq(cq, cmd.solicited_only ?
974 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
975
976 put_cq_read(cq);
977
978 return in_len;
979 }
980
981 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
982 const char __user *buf, int in_len,
983 int out_len)
984 {
985 struct ib_uverbs_destroy_cq cmd;
986 struct ib_uverbs_destroy_cq_resp resp;
987 struct ib_uobject *uobj;
988 struct ib_cq *cq;
989 struct ib_ucq_object *obj;
990 struct ib_uverbs_event_file *ev_file;
991 int ret = -EINVAL;
992
993 if (copy_from_user(&cmd, buf, sizeof cmd))
994 return -EFAULT;
995
996 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
997 if (!uobj)
998 return -EINVAL;
999 cq = uobj->object;
1000 ev_file = cq->cq_context;
1001 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1002
1003 ret = ib_destroy_cq(cq);
1004 if (!ret)
1005 uobj->live = 0;
1006
1007 put_uobj_write(uobj);
1008
1009 if (ret)
1010 return ret;
1011
1012 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1013
1014 mutex_lock(&file->mutex);
1015 list_del(&uobj->list);
1016 mutex_unlock(&file->mutex);
1017
1018 ib_uverbs_release_ucq(file, ev_file, obj);
1019
1020 memset(&resp, 0, sizeof resp);
1021 resp.comp_events_reported = obj->comp_events_reported;
1022 resp.async_events_reported = obj->async_events_reported;
1023
1024 put_uobj(uobj);
1025
1026 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1027 &resp, sizeof resp))
1028 return -EFAULT;
1029
1030 return in_len;
1031 }
1032
1033 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1034 const char __user *buf, int in_len,
1035 int out_len)
1036 {
1037 struct ib_uverbs_create_qp cmd;
1038 struct ib_uverbs_create_qp_resp resp;
1039 struct ib_udata udata;
1040 struct ib_uqp_object *obj;
1041 struct ib_pd *pd;
1042 struct ib_cq *scq, *rcq;
1043 struct ib_srq *srq;
1044 struct ib_qp *qp;
1045 struct ib_qp_init_attr attr;
1046 int ret;
1047
1048 if (out_len < sizeof resp)
1049 return -ENOSPC;
1050
1051 if (copy_from_user(&cmd, buf, sizeof cmd))
1052 return -EFAULT;
1053
1054 INIT_UDATA(&udata, buf + sizeof cmd,
1055 (unsigned long) cmd.response + sizeof resp,
1056 in_len - sizeof cmd, out_len - sizeof resp);
1057
1058 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1059 if (!obj)
1060 return -ENOMEM;
1061
1062 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1063 down_write(&obj->uevent.uobject.mutex);
1064
1065 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1066 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1067 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1068 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1069 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1070
1071 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1072 ret = -EINVAL;
1073 goto err_put;
1074 }
1075
1076 attr.event_handler = ib_uverbs_qp_event_handler;
1077 attr.qp_context = file;
1078 attr.send_cq = scq;
1079 attr.recv_cq = rcq;
1080 attr.srq = srq;
1081 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1082 attr.qp_type = cmd.qp_type;
1083
1084 attr.cap.max_send_wr = cmd.max_send_wr;
1085 attr.cap.max_recv_wr = cmd.max_recv_wr;
1086 attr.cap.max_send_sge = cmd.max_send_sge;
1087 attr.cap.max_recv_sge = cmd.max_recv_sge;
1088 attr.cap.max_inline_data = cmd.max_inline_data;
1089
1090 obj->uevent.events_reported = 0;
1091 INIT_LIST_HEAD(&obj->uevent.event_list);
1092 INIT_LIST_HEAD(&obj->mcast_list);
1093
1094 qp = pd->device->create_qp(pd, &attr, &udata);
1095 if (IS_ERR(qp)) {
1096 ret = PTR_ERR(qp);
1097 goto err_put;
1098 }
1099
1100 qp->device = pd->device;
1101 qp->pd = pd;
1102 qp->send_cq = attr.send_cq;
1103 qp->recv_cq = attr.recv_cq;
1104 qp->srq = attr.srq;
1105 qp->uobject = &obj->uevent.uobject;
1106 qp->event_handler = attr.event_handler;
1107 qp->qp_context = attr.qp_context;
1108 qp->qp_type = attr.qp_type;
1109 atomic_inc(&pd->usecnt);
1110 atomic_inc(&attr.send_cq->usecnt);
1111 atomic_inc(&attr.recv_cq->usecnt);
1112 if (attr.srq)
1113 atomic_inc(&attr.srq->usecnt);
1114
1115 obj->uevent.uobject.object = qp;
1116 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1117 if (ret)
1118 goto err_destroy;
1119
1120 memset(&resp, 0, sizeof resp);
1121 resp.qpn = qp->qp_num;
1122 resp.qp_handle = obj->uevent.uobject.id;
1123 resp.max_recv_sge = attr.cap.max_recv_sge;
1124 resp.max_send_sge = attr.cap.max_send_sge;
1125 resp.max_recv_wr = attr.cap.max_recv_wr;
1126 resp.max_send_wr = attr.cap.max_send_wr;
1127 resp.max_inline_data = attr.cap.max_inline_data;
1128
1129 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1130 &resp, sizeof resp)) {
1131 ret = -EFAULT;
1132 goto err_copy;
1133 }
1134
1135 put_pd_read(pd);
1136 put_cq_read(scq);
1137 if (rcq != scq)
1138 put_cq_read(rcq);
1139 if (srq)
1140 put_srq_read(srq);
1141
1142 mutex_lock(&file->mutex);
1143 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1144 mutex_unlock(&file->mutex);
1145
1146 obj->uevent.uobject.live = 1;
1147
1148 up_write(&obj->uevent.uobject.mutex);
1149
1150 return in_len;
1151
1152 err_copy:
1153 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1154
1155 err_destroy:
1156 ib_destroy_qp(qp);
1157
1158 err_put:
1159 if (pd)
1160 put_pd_read(pd);
1161 if (scq)
1162 put_cq_read(scq);
1163 if (rcq && rcq != scq)
1164 put_cq_read(rcq);
1165 if (srq)
1166 put_srq_read(srq);
1167
1168 put_uobj_write(&obj->uevent.uobject);
1169 return ret;
1170 }
1171
1172 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1173 const char __user *buf, int in_len,
1174 int out_len)
1175 {
1176 struct ib_uverbs_query_qp cmd;
1177 struct ib_uverbs_query_qp_resp resp;
1178 struct ib_qp *qp;
1179 struct ib_qp_attr *attr;
1180 struct ib_qp_init_attr *init_attr;
1181 int ret;
1182
1183 if (copy_from_user(&cmd, buf, sizeof cmd))
1184 return -EFAULT;
1185
1186 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1187 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1188 if (!attr || !init_attr) {
1189 ret = -ENOMEM;
1190 goto out;
1191 }
1192
1193 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1194 if (!qp) {
1195 ret = -EINVAL;
1196 goto out;
1197 }
1198
1199 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1200
1201 put_qp_read(qp);
1202
1203 if (ret)
1204 goto out;
1205
1206 memset(&resp, 0, sizeof resp);
1207
1208 resp.qp_state = attr->qp_state;
1209 resp.cur_qp_state = attr->cur_qp_state;
1210 resp.path_mtu = attr->path_mtu;
1211 resp.path_mig_state = attr->path_mig_state;
1212 resp.qkey = attr->qkey;
1213 resp.rq_psn = attr->rq_psn;
1214 resp.sq_psn = attr->sq_psn;
1215 resp.dest_qp_num = attr->dest_qp_num;
1216 resp.qp_access_flags = attr->qp_access_flags;
1217 resp.pkey_index = attr->pkey_index;
1218 resp.alt_pkey_index = attr->alt_pkey_index;
1219 resp.en_sqd_async_notify = attr->en_sqd_async_notify;
1220 resp.max_rd_atomic = attr->max_rd_atomic;
1221 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1222 resp.min_rnr_timer = attr->min_rnr_timer;
1223 resp.port_num = attr->port_num;
1224 resp.timeout = attr->timeout;
1225 resp.retry_cnt = attr->retry_cnt;
1226 resp.rnr_retry = attr->rnr_retry;
1227 resp.alt_port_num = attr->alt_port_num;
1228 resp.alt_timeout = attr->alt_timeout;
1229
1230 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1231 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1232 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1233 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1234 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1235 resp.dest.dlid = attr->ah_attr.dlid;
1236 resp.dest.sl = attr->ah_attr.sl;
1237 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1238 resp.dest.static_rate = attr->ah_attr.static_rate;
1239 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1240 resp.dest.port_num = attr->ah_attr.port_num;
1241
1242 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1243 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1244 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1245 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1246 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1247 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1248 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1249 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1250 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1251 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1252 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1253
1254 resp.max_send_wr = init_attr->cap.max_send_wr;
1255 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1256 resp.max_send_sge = init_attr->cap.max_send_sge;
1257 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1258 resp.max_inline_data = init_attr->cap.max_inline_data;
1259 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1260
1261 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1262 &resp, sizeof resp))
1263 ret = -EFAULT;
1264
1265 out:
1266 kfree(attr);
1267 kfree(init_attr);
1268
1269 return ret ? ret : in_len;
1270 }
1271
1272 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1273 const char __user *buf, int in_len,
1274 int out_len)
1275 {
1276 struct ib_uverbs_modify_qp cmd;
1277 struct ib_qp *qp;
1278 struct ib_qp_attr *attr;
1279 int ret;
1280
1281 if (copy_from_user(&cmd, buf, sizeof cmd))
1282 return -EFAULT;
1283
1284 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1285 if (!attr)
1286 return -ENOMEM;
1287
1288 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1289 if (!qp) {
1290 ret = -EINVAL;
1291 goto out;
1292 }
1293
1294 attr->qp_state = cmd.qp_state;
1295 attr->cur_qp_state = cmd.cur_qp_state;
1296 attr->path_mtu = cmd.path_mtu;
1297 attr->path_mig_state = cmd.path_mig_state;
1298 attr->qkey = cmd.qkey;
1299 attr->rq_psn = cmd.rq_psn;
1300 attr->sq_psn = cmd.sq_psn;
1301 attr->dest_qp_num = cmd.dest_qp_num;
1302 attr->qp_access_flags = cmd.qp_access_flags;
1303 attr->pkey_index = cmd.pkey_index;
1304 attr->alt_pkey_index = cmd.alt_pkey_index;
1305 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1306 attr->max_rd_atomic = cmd.max_rd_atomic;
1307 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1308 attr->min_rnr_timer = cmd.min_rnr_timer;
1309 attr->port_num = cmd.port_num;
1310 attr->timeout = cmd.timeout;
1311 attr->retry_cnt = cmd.retry_cnt;
1312 attr->rnr_retry = cmd.rnr_retry;
1313 attr->alt_port_num = cmd.alt_port_num;
1314 attr->alt_timeout = cmd.alt_timeout;
1315
1316 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1317 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1318 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1319 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1320 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1321 attr->ah_attr.dlid = cmd.dest.dlid;
1322 attr->ah_attr.sl = cmd.dest.sl;
1323 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1324 attr->ah_attr.static_rate = cmd.dest.static_rate;
1325 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1326 attr->ah_attr.port_num = cmd.dest.port_num;
1327
1328 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1329 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1330 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1331 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1332 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1333 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1334 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1335 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1336 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1337 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1338 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1339
1340 ret = ib_modify_qp(qp, attr, cmd.attr_mask);
1341
1342 put_qp_read(qp);
1343
1344 if (ret)
1345 goto out;
1346
1347 ret = in_len;
1348
1349 out:
1350 kfree(attr);
1351
1352 return ret;
1353 }
1354
1355 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1356 const char __user *buf, int in_len,
1357 int out_len)
1358 {
1359 struct ib_uverbs_destroy_qp cmd;
1360 struct ib_uverbs_destroy_qp_resp resp;
1361 struct ib_uobject *uobj;
1362 struct ib_qp *qp;
1363 struct ib_uqp_object *obj;
1364 int ret = -EINVAL;
1365
1366 if (copy_from_user(&cmd, buf, sizeof cmd))
1367 return -EFAULT;
1368
1369 memset(&resp, 0, sizeof resp);
1370
1371 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1372 if (!uobj)
1373 return -EINVAL;
1374 qp = uobj->object;
1375 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1376
1377 if (!list_empty(&obj->mcast_list)) {
1378 put_uobj_write(uobj);
1379 return -EBUSY;
1380 }
1381
1382 ret = ib_destroy_qp(qp);
1383 if (!ret)
1384 uobj->live = 0;
1385
1386 put_uobj_write(uobj);
1387
1388 if (ret)
1389 return ret;
1390
1391 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1392
1393 mutex_lock(&file->mutex);
1394 list_del(&uobj->list);
1395 mutex_unlock(&file->mutex);
1396
1397 ib_uverbs_release_uevent(file, &obj->uevent);
1398
1399 resp.events_reported = obj->uevent.events_reported;
1400
1401 put_uobj(uobj);
1402
1403 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1404 &resp, sizeof resp))
1405 return -EFAULT;
1406
1407 return in_len;
1408 }
1409
1410 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1411 const char __user *buf, int in_len,
1412 int out_len)
1413 {
1414 struct ib_uverbs_post_send cmd;
1415 struct ib_uverbs_post_send_resp resp;
1416 struct ib_uverbs_send_wr *user_wr;
1417 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1418 struct ib_qp *qp;
1419 int i, sg_ind;
1420 int is_ud;
1421 ssize_t ret = -EINVAL;
1422
1423 if (copy_from_user(&cmd, buf, sizeof cmd))
1424 return -EFAULT;
1425
1426 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1427 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1428 return -EINVAL;
1429
1430 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1431 return -EINVAL;
1432
1433 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1434 if (!user_wr)
1435 return -ENOMEM;
1436
1437 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1438 if (!qp)
1439 goto out;
1440
1441 is_ud = qp->qp_type == IB_QPT_UD;
1442 sg_ind = 0;
1443 last = NULL;
1444 for (i = 0; i < cmd.wr_count; ++i) {
1445 if (copy_from_user(user_wr,
1446 buf + sizeof cmd + i * cmd.wqe_size,
1447 cmd.wqe_size)) {
1448 ret = -EFAULT;
1449 goto out_put;
1450 }
1451
1452 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1453 ret = -EINVAL;
1454 goto out_put;
1455 }
1456
1457 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1458 user_wr->num_sge * sizeof (struct ib_sge),
1459 GFP_KERNEL);
1460 if (!next) {
1461 ret = -ENOMEM;
1462 goto out_put;
1463 }
1464
1465 if (!last)
1466 wr = next;
1467 else
1468 last->next = next;
1469 last = next;
1470
1471 next->next = NULL;
1472 next->wr_id = user_wr->wr_id;
1473 next->num_sge = user_wr->num_sge;
1474 next->opcode = user_wr->opcode;
1475 next->send_flags = user_wr->send_flags;
1476 next->imm_data = (__be32 __force) user_wr->imm_data;
1477
1478 if (is_ud) {
1479 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1480 file->ucontext);
1481 if (!next->wr.ud.ah) {
1482 ret = -EINVAL;
1483 goto out_put;
1484 }
1485 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1486 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1487 } else {
1488 switch (next->opcode) {
1489 case IB_WR_RDMA_WRITE:
1490 case IB_WR_RDMA_WRITE_WITH_IMM:
1491 case IB_WR_RDMA_READ:
1492 next->wr.rdma.remote_addr =
1493 user_wr->wr.rdma.remote_addr;
1494 next->wr.rdma.rkey =
1495 user_wr->wr.rdma.rkey;
1496 break;
1497 case IB_WR_ATOMIC_CMP_AND_SWP:
1498 case IB_WR_ATOMIC_FETCH_AND_ADD:
1499 next->wr.atomic.remote_addr =
1500 user_wr->wr.atomic.remote_addr;
1501 next->wr.atomic.compare_add =
1502 user_wr->wr.atomic.compare_add;
1503 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1504 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1505 break;
1506 default:
1507 break;
1508 }
1509 }
1510
1511 if (next->num_sge) {
1512 next->sg_list = (void *) next +
1513 ALIGN(sizeof *next, sizeof (struct ib_sge));
1514 if (copy_from_user(next->sg_list,
1515 buf + sizeof cmd +
1516 cmd.wr_count * cmd.wqe_size +
1517 sg_ind * sizeof (struct ib_sge),
1518 next->num_sge * sizeof (struct ib_sge))) {
1519 ret = -EFAULT;
1520 goto out_put;
1521 }
1522 sg_ind += next->num_sge;
1523 } else
1524 next->sg_list = NULL;
1525 }
1526
1527 resp.bad_wr = 0;
1528 ret = qp->device->post_send(qp, wr, &bad_wr);
1529 if (ret)
1530 for (next = wr; next; next = next->next) {
1531 ++resp.bad_wr;
1532 if (next == bad_wr)
1533 break;
1534 }
1535
1536 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1537 &resp, sizeof resp))
1538 ret = -EFAULT;
1539
1540 out_put:
1541 put_qp_read(qp);
1542
1543 while (wr) {
1544 if (is_ud && wr->wr.ud.ah)
1545 put_ah_read(wr->wr.ud.ah);
1546 next = wr->next;
1547 kfree(wr);
1548 wr = next;
1549 }
1550
1551 out:
1552 kfree(user_wr);
1553
1554 return ret ? ret : in_len;
1555 }
1556
1557 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1558 int in_len,
1559 u32 wr_count,
1560 u32 sge_count,
1561 u32 wqe_size)
1562 {
1563 struct ib_uverbs_recv_wr *user_wr;
1564 struct ib_recv_wr *wr = NULL, *last, *next;
1565 int sg_ind;
1566 int i;
1567 int ret;
1568
1569 if (in_len < wqe_size * wr_count +
1570 sge_count * sizeof (struct ib_uverbs_sge))
1571 return ERR_PTR(-EINVAL);
1572
1573 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1574 return ERR_PTR(-EINVAL);
1575
1576 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1577 if (!user_wr)
1578 return ERR_PTR(-ENOMEM);
1579
1580 sg_ind = 0;
1581 last = NULL;
1582 for (i = 0; i < wr_count; ++i) {
1583 if (copy_from_user(user_wr, buf + i * wqe_size,
1584 wqe_size)) {
1585 ret = -EFAULT;
1586 goto err;
1587 }
1588
1589 if (user_wr->num_sge + sg_ind > sge_count) {
1590 ret = -EINVAL;
1591 goto err;
1592 }
1593
1594 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1595 user_wr->num_sge * sizeof (struct ib_sge),
1596 GFP_KERNEL);
1597 if (!next) {
1598 ret = -ENOMEM;
1599 goto err;
1600 }
1601
1602 if (!last)
1603 wr = next;
1604 else
1605 last->next = next;
1606 last = next;
1607
1608 next->next = NULL;
1609 next->wr_id = user_wr->wr_id;
1610 next->num_sge = user_wr->num_sge;
1611
1612 if (next->num_sge) {
1613 next->sg_list = (void *) next +
1614 ALIGN(sizeof *next, sizeof (struct ib_sge));
1615 if (copy_from_user(next->sg_list,
1616 buf + wr_count * wqe_size +
1617 sg_ind * sizeof (struct ib_sge),
1618 next->num_sge * sizeof (struct ib_sge))) {
1619 ret = -EFAULT;
1620 goto err;
1621 }
1622 sg_ind += next->num_sge;
1623 } else
1624 next->sg_list = NULL;
1625 }
1626
1627 kfree(user_wr);
1628 return wr;
1629
1630 err:
1631 kfree(user_wr);
1632
1633 while (wr) {
1634 next = wr->next;
1635 kfree(wr);
1636 wr = next;
1637 }
1638
1639 return ERR_PTR(ret);
1640 }
1641
1642 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1643 const char __user *buf, int in_len,
1644 int out_len)
1645 {
1646 struct ib_uverbs_post_recv cmd;
1647 struct ib_uverbs_post_recv_resp resp;
1648 struct ib_recv_wr *wr, *next, *bad_wr;
1649 struct ib_qp *qp;
1650 ssize_t ret = -EINVAL;
1651
1652 if (copy_from_user(&cmd, buf, sizeof cmd))
1653 return -EFAULT;
1654
1655 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1656 in_len - sizeof cmd, cmd.wr_count,
1657 cmd.sge_count, cmd.wqe_size);
1658 if (IS_ERR(wr))
1659 return PTR_ERR(wr);
1660
1661 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1662 if (!qp)
1663 goto out;
1664
1665 resp.bad_wr = 0;
1666 ret = qp->device->post_recv(qp, wr, &bad_wr);
1667
1668 put_qp_read(qp);
1669
1670 if (ret)
1671 for (next = wr; next; next = next->next) {
1672 ++resp.bad_wr;
1673 if (next == bad_wr)
1674 break;
1675 }
1676
1677
1678 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1679 &resp, sizeof resp))
1680 ret = -EFAULT;
1681
1682 out:
1683 while (wr) {
1684 next = wr->next;
1685 kfree(wr);
1686 wr = next;
1687 }
1688
1689 return ret ? ret : in_len;
1690 }
1691
1692 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1693 const char __user *buf, int in_len,
1694 int out_len)
1695 {
1696 struct ib_uverbs_post_srq_recv cmd;
1697 struct ib_uverbs_post_srq_recv_resp resp;
1698 struct ib_recv_wr *wr, *next, *bad_wr;
1699 struct ib_srq *srq;
1700 ssize_t ret = -EINVAL;
1701
1702 if (copy_from_user(&cmd, buf, sizeof cmd))
1703 return -EFAULT;
1704
1705 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1706 in_len - sizeof cmd, cmd.wr_count,
1707 cmd.sge_count, cmd.wqe_size);
1708 if (IS_ERR(wr))
1709 return PTR_ERR(wr);
1710
1711 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1712 if (!srq)
1713 goto out;
1714
1715 resp.bad_wr = 0;
1716 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1717
1718 put_srq_read(srq);
1719
1720 if (ret)
1721 for (next = wr; next; next = next->next) {
1722 ++resp.bad_wr;
1723 if (next == bad_wr)
1724 break;
1725 }
1726
1727
1728 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1729 &resp, sizeof resp))
1730 ret = -EFAULT;
1731
1732 out:
1733 while (wr) {
1734 next = wr->next;
1735 kfree(wr);
1736 wr = next;
1737 }
1738
1739 return ret ? ret : in_len;
1740 }
1741
1742 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1743 const char __user *buf, int in_len,
1744 int out_len)
1745 {
1746 struct ib_uverbs_create_ah cmd;
1747 struct ib_uverbs_create_ah_resp resp;
1748 struct ib_uobject *uobj;
1749 struct ib_pd *pd;
1750 struct ib_ah *ah;
1751 struct ib_ah_attr attr;
1752 int ret;
1753
1754 if (out_len < sizeof resp)
1755 return -ENOSPC;
1756
1757 if (copy_from_user(&cmd, buf, sizeof cmd))
1758 return -EFAULT;
1759
1760 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1761 if (!uobj)
1762 return -ENOMEM;
1763
1764 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1765 down_write(&uobj->mutex);
1766
1767 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1768 if (!pd) {
1769 ret = -EINVAL;
1770 goto err;
1771 }
1772
1773 attr.dlid = cmd.attr.dlid;
1774 attr.sl = cmd.attr.sl;
1775 attr.src_path_bits = cmd.attr.src_path_bits;
1776 attr.static_rate = cmd.attr.static_rate;
1777 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
1778 attr.port_num = cmd.attr.port_num;
1779 attr.grh.flow_label = cmd.attr.grh.flow_label;
1780 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1781 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1782 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1783 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1784
1785 ah = ib_create_ah(pd, &attr);
1786 if (IS_ERR(ah)) {
1787 ret = PTR_ERR(ah);
1788 goto err_put;
1789 }
1790
1791 ah->uobject = uobj;
1792 uobj->object = ah;
1793
1794 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1795 if (ret)
1796 goto err_destroy;
1797
1798 resp.ah_handle = uobj->id;
1799
1800 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1801 &resp, sizeof resp)) {
1802 ret = -EFAULT;
1803 goto err_copy;
1804 }
1805
1806 put_pd_read(pd);
1807
1808 mutex_lock(&file->mutex);
1809 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1810 mutex_unlock(&file->mutex);
1811
1812 uobj->live = 1;
1813
1814 up_write(&uobj->mutex);
1815
1816 return in_len;
1817
1818 err_copy:
1819 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1820
1821 err_destroy:
1822 ib_destroy_ah(ah);
1823
1824 err_put:
1825 put_pd_read(pd);
1826
1827 err:
1828 put_uobj_write(uobj);
1829 return ret;
1830 }
1831
1832 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1833 const char __user *buf, int in_len, int out_len)
1834 {
1835 struct ib_uverbs_destroy_ah cmd;
1836 struct ib_ah *ah;
1837 struct ib_uobject *uobj;
1838 int ret;
1839
1840 if (copy_from_user(&cmd, buf, sizeof cmd))
1841 return -EFAULT;
1842
1843 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1844 if (!uobj)
1845 return -EINVAL;
1846 ah = uobj->object;
1847
1848 ret = ib_destroy_ah(ah);
1849 if (!ret)
1850 uobj->live = 0;
1851
1852 put_uobj_write(uobj);
1853
1854 if (ret)
1855 return ret;
1856
1857 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1858
1859 mutex_lock(&file->mutex);
1860 list_del(&uobj->list);
1861 mutex_unlock(&file->mutex);
1862
1863 put_uobj(uobj);
1864
1865 return in_len;
1866 }
1867
1868 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1869 const char __user *buf, int in_len,
1870 int out_len)
1871 {
1872 struct ib_uverbs_attach_mcast cmd;
1873 struct ib_qp *qp;
1874 struct ib_uqp_object *obj;
1875 struct ib_uverbs_mcast_entry *mcast;
1876 int ret;
1877
1878 if (copy_from_user(&cmd, buf, sizeof cmd))
1879 return -EFAULT;
1880
1881 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1882 if (!qp)
1883 return -EINVAL;
1884
1885 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1886
1887 list_for_each_entry(mcast, &obj->mcast_list, list)
1888 if (cmd.mlid == mcast->lid &&
1889 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1890 ret = 0;
1891 goto out_put;
1892 }
1893
1894 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1895 if (!mcast) {
1896 ret = -ENOMEM;
1897 goto out_put;
1898 }
1899
1900 mcast->lid = cmd.mlid;
1901 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1902
1903 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1904 if (!ret)
1905 list_add_tail(&mcast->list, &obj->mcast_list);
1906 else
1907 kfree(mcast);
1908
1909 out_put:
1910 put_qp_read(qp);
1911
1912 return ret ? ret : in_len;
1913 }
1914
1915 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1916 const char __user *buf, int in_len,
1917 int out_len)
1918 {
1919 struct ib_uverbs_detach_mcast cmd;
1920 struct ib_uqp_object *obj;
1921 struct ib_qp *qp;
1922 struct ib_uverbs_mcast_entry *mcast;
1923 int ret = -EINVAL;
1924
1925 if (copy_from_user(&cmd, buf, sizeof cmd))
1926 return -EFAULT;
1927
1928 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1929 if (!qp)
1930 return -EINVAL;
1931
1932 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1933 if (ret)
1934 goto out_put;
1935
1936 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1937
1938 list_for_each_entry(mcast, &obj->mcast_list, list)
1939 if (cmd.mlid == mcast->lid &&
1940 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1941 list_del(&mcast->list);
1942 kfree(mcast);
1943 break;
1944 }
1945
1946 out_put:
1947 put_qp_read(qp);
1948
1949 return ret ? ret : in_len;
1950 }
1951
1952 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1953 const char __user *buf, int in_len,
1954 int out_len)
1955 {
1956 struct ib_uverbs_create_srq cmd;
1957 struct ib_uverbs_create_srq_resp resp;
1958 struct ib_udata udata;
1959 struct ib_uevent_object *obj;
1960 struct ib_pd *pd;
1961 struct ib_srq *srq;
1962 struct ib_srq_init_attr attr;
1963 int ret;
1964
1965 if (out_len < sizeof resp)
1966 return -ENOSPC;
1967
1968 if (copy_from_user(&cmd, buf, sizeof cmd))
1969 return -EFAULT;
1970
1971 INIT_UDATA(&udata, buf + sizeof cmd,
1972 (unsigned long) cmd.response + sizeof resp,
1973 in_len - sizeof cmd, out_len - sizeof resp);
1974
1975 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1976 if (!obj)
1977 return -ENOMEM;
1978
1979 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1980 down_write(&obj->uobject.mutex);
1981
1982 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1983 if (!pd) {
1984 ret = -EINVAL;
1985 goto err;
1986 }
1987
1988 attr.event_handler = ib_uverbs_srq_event_handler;
1989 attr.srq_context = file;
1990 attr.attr.max_wr = cmd.max_wr;
1991 attr.attr.max_sge = cmd.max_sge;
1992 attr.attr.srq_limit = cmd.srq_limit;
1993
1994 obj->events_reported = 0;
1995 INIT_LIST_HEAD(&obj->event_list);
1996
1997 srq = pd->device->create_srq(pd, &attr, &udata);
1998 if (IS_ERR(srq)) {
1999 ret = PTR_ERR(srq);
2000 goto err_put;
2001 }
2002
2003 srq->device = pd->device;
2004 srq->pd = pd;
2005 srq->uobject = &obj->uobject;
2006 srq->event_handler = attr.event_handler;
2007 srq->srq_context = attr.srq_context;
2008 atomic_inc(&pd->usecnt);
2009 atomic_set(&srq->usecnt, 0);
2010
2011 obj->uobject.object = srq;
2012 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2013 if (ret)
2014 goto err_destroy;
2015
2016 memset(&resp, 0, sizeof resp);
2017 resp.srq_handle = obj->uobject.id;
2018 resp.max_wr = attr.attr.max_wr;
2019 resp.max_sge = attr.attr.max_sge;
2020
2021 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2022 &resp, sizeof resp)) {
2023 ret = -EFAULT;
2024 goto err_copy;
2025 }
2026
2027 put_pd_read(pd);
2028
2029 mutex_lock(&file->mutex);
2030 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2031 mutex_unlock(&file->mutex);
2032
2033 obj->uobject.live = 1;
2034
2035 up_write(&obj->uobject.mutex);
2036
2037 return in_len;
2038
2039 err_copy:
2040 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2041
2042 err_destroy:
2043 ib_destroy_srq(srq);
2044
2045 err_put:
2046 put_pd_read(pd);
2047
2048 err:
2049 put_uobj_write(&obj->uobject);
2050 return ret;
2051 }
2052
2053 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2054 const char __user *buf, int in_len,
2055 int out_len)
2056 {
2057 struct ib_uverbs_modify_srq cmd;
2058 struct ib_srq *srq;
2059 struct ib_srq_attr attr;
2060 int ret;
2061
2062 if (copy_from_user(&cmd, buf, sizeof cmd))
2063 return -EFAULT;
2064
2065 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2066 if (!srq)
2067 return -EINVAL;
2068
2069 attr.max_wr = cmd.max_wr;
2070 attr.srq_limit = cmd.srq_limit;
2071
2072 ret = ib_modify_srq(srq, &attr, cmd.attr_mask);
2073
2074 put_srq_read(srq);
2075
2076 return ret ? ret : in_len;
2077 }
2078
2079 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2080 const char __user *buf,
2081 int in_len, int out_len)
2082 {
2083 struct ib_uverbs_query_srq cmd;
2084 struct ib_uverbs_query_srq_resp resp;
2085 struct ib_srq_attr attr;
2086 struct ib_srq *srq;
2087 int ret;
2088
2089 if (out_len < sizeof resp)
2090 return -ENOSPC;
2091
2092 if (copy_from_user(&cmd, buf, sizeof cmd))
2093 return -EFAULT;
2094
2095 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2096 if (!srq)
2097 return -EINVAL;
2098
2099 ret = ib_query_srq(srq, &attr);
2100
2101 put_srq_read(srq);
2102
2103 if (ret)
2104 return ret;
2105
2106 memset(&resp, 0, sizeof resp);
2107
2108 resp.max_wr = attr.max_wr;
2109 resp.max_sge = attr.max_sge;
2110 resp.srq_limit = attr.srq_limit;
2111
2112 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2113 &resp, sizeof resp))
2114 return -EFAULT;
2115
2116 return in_len;
2117 }
2118
2119 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2120 const char __user *buf, int in_len,
2121 int out_len)
2122 {
2123 struct ib_uverbs_destroy_srq cmd;
2124 struct ib_uverbs_destroy_srq_resp resp;
2125 struct ib_uobject *uobj;
2126 struct ib_srq *srq;
2127 struct ib_uevent_object *obj;
2128 int ret = -EINVAL;
2129
2130 if (copy_from_user(&cmd, buf, sizeof cmd))
2131 return -EFAULT;
2132
2133 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2134 if (!uobj)
2135 return -EINVAL;
2136 srq = uobj->object;
2137 obj = container_of(uobj, struct ib_uevent_object, uobject);
2138
2139 ret = ib_destroy_srq(srq);
2140 if (!ret)
2141 uobj->live = 0;
2142
2143 put_uobj_write(uobj);
2144
2145 if (ret)
2146 return ret;
2147
2148 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2149
2150 mutex_lock(&file->mutex);
2151 list_del(&uobj->list);
2152 mutex_unlock(&file->mutex);
2153
2154 ib_uverbs_release_uevent(file, obj);
2155
2156 memset(&resp, 0, sizeof resp);
2157 resp.events_reported = obj->events_reported;
2158
2159 put_uobj(uobj);
2160
2161 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2162 &resp, sizeof resp))
2163 ret = -EFAULT;
2164
2165 return ret ? ret : in_len;
2166 }
Linux kernel - Deliverables
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