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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / infiniband / core / uverbs_cmd.c
blobabb87140f29fdab445e87a897bbef91ef79cc1dc
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36 #include <linux/file.h>
37 #include <linux/fs.h>
38 #include <linux/slab.h>
39
40 #include <asm/uaccess.h>
41
42 #include "uverbs.h"
43
44 static struct lock_class_key pd_lock_key;
45 static struct lock_class_key mr_lock_key;
46 static struct lock_class_key cq_lock_key;
47 static struct lock_class_key qp_lock_key;
48 static struct lock_class_key ah_lock_key;
49 static struct lock_class_key srq_lock_key;
50
51 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
52 do { \
53 (udata)->inbuf = (void __user *) (ibuf); \
54 (udata)->outbuf = (void __user *) (obuf); \
55 (udata)->inlen = (ilen); \
56 (udata)->outlen = (olen); \
57 } while (0)
58
59 /*
60 * The ib_uobject locking scheme is as follows:
61 *
62 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
63 * needs to be held during all idr operations. When an object is
64 * looked up, a reference must be taken on the object's kref before
65 * dropping this lock.
66 *
67 * - Each object also has an rwsem. This rwsem must be held for
68 * reading while an operation that uses the object is performed.
69 * For example, while registering an MR, the associated PD's
70 * uobject.mutex must be held for reading. The rwsem must be held
71 * for writing while initializing or destroying an object.
72 *
73 * - In addition, each object has a "live" flag. If this flag is not
74 * set, then lookups of the object will fail even if it is found in
75 * the idr. This handles a reader that blocks and does not acquire
76 * the rwsem until after the object is destroyed. The destroy
77 * operation will set the live flag to 0 and then drop the rwsem;
78 * this will allow the reader to acquire the rwsem, see that the
79 * live flag is 0, and then drop the rwsem and its reference to
80 * object. The underlying storage will not be freed until the last
81 * reference to the object is dropped.
82 */
83
84 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
85 struct ib_ucontext *context, struct lock_class_key *key)
86 {
87 uobj->user_handle = user_handle;
88 uobj->context = context;
89 kref_init(&uobj->ref);
90 init_rwsem(&uobj->mutex);
91 lockdep_set_class(&uobj->mutex, key);
92 uobj->live = 0;
93 }
94
95 static void release_uobj(struct kref *kref)
96 {
97 kfree(container_of(kref, struct ib_uobject, ref));
98 }
99
100 static void put_uobj(struct ib_uobject *uobj)
101 {
102 kref_put(&uobj->ref, release_uobj);
103 }
104
105 static void put_uobj_read(struct ib_uobject *uobj)
106 {
107 up_read(&uobj->mutex);
108 put_uobj(uobj);
109 }
110
111 static void put_uobj_write(struct ib_uobject *uobj)
112 {
113 up_write(&uobj->mutex);
114 put_uobj(uobj);
115 }
116
117 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
118 {
119 int ret;
120
121 retry:
122 if (!idr_pre_get(idr, GFP_KERNEL))
123 return -ENOMEM;
124
125 spin_lock(&ib_uverbs_idr_lock);
126 ret = idr_get_new(idr, uobj, &uobj->id);
127 spin_unlock(&ib_uverbs_idr_lock);
128
129 if (ret == -EAGAIN)
130 goto retry;
131
132 return ret;
133 }
134
135 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
136 {
137 spin_lock(&ib_uverbs_idr_lock);
138 idr_remove(idr, uobj->id);
139 spin_unlock(&ib_uverbs_idr_lock);
140 }
141
142 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
143 struct ib_ucontext *context)
144 {
145 struct ib_uobject *uobj;
146
147 spin_lock(&ib_uverbs_idr_lock);
148 uobj = idr_find(idr, id);
149 if (uobj) {
150 if (uobj->context == context)
151 kref_get(&uobj->ref);
152 else
153 uobj = NULL;
154 }
155 spin_unlock(&ib_uverbs_idr_lock);
156
157 return uobj;
158 }
159
160 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
161 struct ib_ucontext *context, int nested)
162 {
163 struct ib_uobject *uobj;
164
165 uobj = __idr_get_uobj(idr, id, context);
166 if (!uobj)
167 return NULL;
168
169 if (nested)
170 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
171 else
172 down_read(&uobj->mutex);
173 if (!uobj->live) {
174 put_uobj_read(uobj);
175 return NULL;
176 }
177
178 return uobj;
179 }
180
181 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
182 struct ib_ucontext *context)
183 {
184 struct ib_uobject *uobj;
185
186 uobj = __idr_get_uobj(idr, id, context);
187 if (!uobj)
188 return NULL;
189
190 down_write(&uobj->mutex);
191 if (!uobj->live) {
192 put_uobj_write(uobj);
193 return NULL;
194 }
195
196 return uobj;
197 }
198
199 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
200 int nested)
201 {
202 struct ib_uobject *uobj;
203
204 uobj = idr_read_uobj(idr, id, context, nested);
205 return uobj ? uobj->object : NULL;
206 }
207
208 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
209 {
210 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
211 }
212
213 static void put_pd_read(struct ib_pd *pd)
214 {
215 put_uobj_read(pd->uobject);
216 }
217
218 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
219 {
220 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
221 }
222
223 static void put_cq_read(struct ib_cq *cq)
224 {
225 put_uobj_read(cq->uobject);
226 }
227
228 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
229 {
230 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
231 }
232
233 static void put_ah_read(struct ib_ah *ah)
234 {
235 put_uobj_read(ah->uobject);
236 }
237
238 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
239 {
240 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
241 }
242
243 static void put_qp_read(struct ib_qp *qp)
244 {
245 put_uobj_read(qp->uobject);
246 }
247
248 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
249 {
250 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
251 }
252
253 static void put_srq_read(struct ib_srq *srq)
254 {
255 put_uobj_read(srq->uobject);
256 }
257
258 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
259 const char __user *buf,
260 int in_len, int out_len)
261 {
262 struct ib_uverbs_get_context cmd;
263 struct ib_uverbs_get_context_resp resp;
264 struct ib_udata udata;
265 struct ib_device *ibdev = file->device->ib_dev;
266 struct ib_ucontext *ucontext;
267 struct file *filp;
268 int ret;
269
270 if (out_len < sizeof resp)
271 return -ENOSPC;
272
273 if (copy_from_user(&cmd, buf, sizeof cmd))
274 return -EFAULT;
275
276 mutex_lock(&file->mutex);
277
278 if (file->ucontext) {
279 ret = -EINVAL;
280 goto err;
281 }
282
283 INIT_UDATA(&udata, buf + sizeof cmd,
284 (unsigned long) cmd.response + sizeof resp,
285 in_len - sizeof cmd, out_len - sizeof resp);
286
287 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
288 if (IS_ERR(ucontext)) {
289 ret = PTR_ERR(ucontext);
290 goto err;
291 }
292
293 ucontext->device = ibdev;
294 INIT_LIST_HEAD(&ucontext->pd_list);
295 INIT_LIST_HEAD(&ucontext->mr_list);
296 INIT_LIST_HEAD(&ucontext->mw_list);
297 INIT_LIST_HEAD(&ucontext->cq_list);
298 INIT_LIST_HEAD(&ucontext->qp_list);
299 INIT_LIST_HEAD(&ucontext->srq_list);
300 INIT_LIST_HEAD(&ucontext->ah_list);
301 ucontext->closing = 0;
302
303 resp.num_comp_vectors = file->device->num_comp_vectors;
304
305 ret = get_unused_fd();
306 if (ret < 0)
307 goto err_free;
308 resp.async_fd = ret;
309
310 filp = ib_uverbs_alloc_event_file(file, 1);
311 if (IS_ERR(filp)) {
312 ret = PTR_ERR(filp);
313 goto err_fd;
314 }
315
316 if (copy_to_user((void __user *) (unsigned long) cmd.response,
317 &resp, sizeof resp)) {
318 ret = -EFAULT;
319 goto err_file;
320 }
321
322 file->async_file = filp->private_data;
323
324 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
325 ib_uverbs_event_handler);
326 ret = ib_register_event_handler(&file->event_handler);
327 if (ret)
328 goto err_file;
329
330 kref_get(&file->async_file->ref);
331 kref_get(&file->ref);
332 file->ucontext = ucontext;
333
334 fd_install(resp.async_fd, filp);
335
336 mutex_unlock(&file->mutex);
337
338 return in_len;
339
340 err_file:
341 fput(filp);
342
343 err_fd:
344 put_unused_fd(resp.async_fd);
345
346 err_free:
347 ibdev->dealloc_ucontext(ucontext);
348
349 err:
350 mutex_unlock(&file->mutex);
351 return ret;
352 }
353
354 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
355 const char __user *buf,
356 int in_len, int out_len)
357 {
358 struct ib_uverbs_query_device cmd;
359 struct ib_uverbs_query_device_resp resp;
360 struct ib_device_attr attr;
361 int ret;
362
363 if (out_len < sizeof resp)
364 return -ENOSPC;
365
366 if (copy_from_user(&cmd, buf, sizeof cmd))
367 return -EFAULT;
368
369 ret = ib_query_device(file->device->ib_dev, &attr);
370 if (ret)
371 return ret;
372
373 memset(&resp, 0, sizeof resp);
374
375 resp.fw_ver = attr.fw_ver;
376 resp.node_guid = file->device->ib_dev->node_guid;
377 resp.sys_image_guid = attr.sys_image_guid;
378 resp.max_mr_size = attr.max_mr_size;
379 resp.page_size_cap = attr.page_size_cap;
380 resp.vendor_id = attr.vendor_id;
381 resp.vendor_part_id = attr.vendor_part_id;
382 resp.hw_ver = attr.hw_ver;
383 resp.max_qp = attr.max_qp;
384 resp.max_qp_wr = attr.max_qp_wr;
385 resp.device_cap_flags = attr.device_cap_flags;
386 resp.max_sge = attr.max_sge;
387 resp.max_sge_rd = attr.max_sge_rd;
388 resp.max_cq = attr.max_cq;
389 resp.max_cqe = attr.max_cqe;
390 resp.max_mr = attr.max_mr;
391 resp.max_pd = attr.max_pd;
392 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
393 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
394 resp.max_res_rd_atom = attr.max_res_rd_atom;
395 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
396 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
397 resp.atomic_cap = attr.atomic_cap;
398 resp.max_ee = attr.max_ee;
399 resp.max_rdd = attr.max_rdd;
400 resp.max_mw = attr.max_mw;
401 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
402 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
403 resp.max_mcast_grp = attr.max_mcast_grp;
404 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
405 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
406 resp.max_ah = attr.max_ah;
407 resp.max_fmr = attr.max_fmr;
408 resp.max_map_per_fmr = attr.max_map_per_fmr;
409 resp.max_srq = attr.max_srq;
410 resp.max_srq_wr = attr.max_srq_wr;
411 resp.max_srq_sge = attr.max_srq_sge;
412 resp.max_pkeys = attr.max_pkeys;
413 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
414 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
415
416 if (copy_to_user((void __user *) (unsigned long) cmd.response,
417 &resp, sizeof resp))
418 return -EFAULT;
419
420 return in_len;
421 }
422
423 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
424 const char __user *buf,
425 int in_len, int out_len)
426 {
427 struct ib_uverbs_query_port cmd;
428 struct ib_uverbs_query_port_resp resp;
429 struct ib_port_attr attr;
430 int ret;
431
432 if (out_len < sizeof resp)
433 return -ENOSPC;
434
435 if (copy_from_user(&cmd, buf, sizeof cmd))
436 return -EFAULT;
437
438 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
439 if (ret)
440 return ret;
441
442 memset(&resp, 0, sizeof resp);
443
444 resp.state = attr.state;
445 resp.max_mtu = attr.max_mtu;
446 resp.active_mtu = attr.active_mtu;
447 resp.gid_tbl_len = attr.gid_tbl_len;
448 resp.port_cap_flags = attr.port_cap_flags;
449 resp.max_msg_sz = attr.max_msg_sz;
450 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
451 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
452 resp.pkey_tbl_len = attr.pkey_tbl_len;
453 resp.lid = attr.lid;
454 resp.sm_lid = attr.sm_lid;
455 resp.lmc = attr.lmc;
456 resp.max_vl_num = attr.max_vl_num;
457 resp.sm_sl = attr.sm_sl;
458 resp.subnet_timeout = attr.subnet_timeout;
459 resp.init_type_reply = attr.init_type_reply;
460 resp.active_width = attr.active_width;
461 resp.active_speed = attr.active_speed;
462 resp.phys_state = attr.phys_state;
463
464 if (copy_to_user((void __user *) (unsigned long) cmd.response,
465 &resp, sizeof resp))
466 return -EFAULT;
467
468 return in_len;
469 }
470
471 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
472 const char __user *buf,
473 int in_len, int out_len)
474 {
475 struct ib_uverbs_alloc_pd cmd;
476 struct ib_uverbs_alloc_pd_resp resp;
477 struct ib_udata udata;
478 struct ib_uobject *uobj;
479 struct ib_pd *pd;
480 int ret;
481
482 if (out_len < sizeof resp)
483 return -ENOSPC;
484
485 if (copy_from_user(&cmd, buf, sizeof cmd))
486 return -EFAULT;
487
488 INIT_UDATA(&udata, buf + sizeof cmd,
489 (unsigned long) cmd.response + sizeof resp,
490 in_len - sizeof cmd, out_len - sizeof resp);
491
492 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
493 if (!uobj)
494 return -ENOMEM;
495
496 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
497 down_write(&uobj->mutex);
498
499 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
500 file->ucontext, &udata);
501 if (IS_ERR(pd)) {
502 ret = PTR_ERR(pd);
503 goto err;
504 }
505
506 pd->device = file->device->ib_dev;
507 pd->uobject = uobj;
508 atomic_set(&pd->usecnt, 0);
509
510 uobj->object = pd;
511 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
512 if (ret)
513 goto err_idr;
514
515 memset(&resp, 0, sizeof resp);
516 resp.pd_handle = uobj->id;
517
518 if (copy_to_user((void __user *) (unsigned long) cmd.response,
519 &resp, sizeof resp)) {
520 ret = -EFAULT;
521 goto err_copy;
522 }
523
524 mutex_lock(&file->mutex);
525 list_add_tail(&uobj->list, &file->ucontext->pd_list);
526 mutex_unlock(&file->mutex);
527
528 uobj->live = 1;
529
530 up_write(&uobj->mutex);
531
532 return in_len;
533
534 err_copy:
535 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
536
537 err_idr:
538 ib_dealloc_pd(pd);
539
540 err:
541 put_uobj_write(uobj);
542 return ret;
543 }
544
545 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
546 const char __user *buf,
547 int in_len, int out_len)
548 {
549 struct ib_uverbs_dealloc_pd cmd;
550 struct ib_uobject *uobj;
551 int ret;
552
553 if (copy_from_user(&cmd, buf, sizeof cmd))
554 return -EFAULT;
555
556 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
557 if (!uobj)
558 return -EINVAL;
559
560 ret = ib_dealloc_pd(uobj->object);
561 if (!ret)
562 uobj->live = 0;
563
564 put_uobj_write(uobj);
565
566 if (ret)
567 return ret;
568
569 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
570
571 mutex_lock(&file->mutex);
572 list_del(&uobj->list);
573 mutex_unlock(&file->mutex);
574
575 put_uobj(uobj);
576
577 return in_len;
578 }
579
580 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
581 const char __user *buf, int in_len,
582 int out_len)
583 {
584 struct ib_uverbs_reg_mr cmd;
585 struct ib_uverbs_reg_mr_resp resp;
586 struct ib_udata udata;
587 struct ib_uobject *uobj;
588 struct ib_pd *pd;
589 struct ib_mr *mr;
590 int ret;
591
592 if (out_len < sizeof resp)
593 return -ENOSPC;
594
595 if (copy_from_user(&cmd, buf, sizeof cmd))
596 return -EFAULT;
597
598 INIT_UDATA(&udata, buf + sizeof cmd,
599 (unsigned long) cmd.response + sizeof resp,
600 in_len - sizeof cmd, out_len - sizeof resp);
601
602 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
603 return -EINVAL;
604
605 /*
606 * Local write permission is required if remote write or
607 * remote atomic permission is also requested.
608 */
609 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
610 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
611 return -EINVAL;
612
613 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
614 if (!uobj)
615 return -ENOMEM;
616
617 init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
618 down_write(&uobj->mutex);
619
620 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
621 if (!pd) {
622 ret = -EINVAL;
623 goto err_free;
624 }
625
626 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
627 cmd.access_flags, &udata);
628 if (IS_ERR(mr)) {
629 ret = PTR_ERR(mr);
630 goto err_put;
631 }
632
633 mr->device = pd->device;
634 mr->pd = pd;
635 mr->uobject = uobj;
636 atomic_inc(&pd->usecnt);
637 atomic_set(&mr->usecnt, 0);
638
639 uobj->object = mr;
640 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
641 if (ret)
642 goto err_unreg;
643
644 memset(&resp, 0, sizeof resp);
645 resp.lkey = mr->lkey;
646 resp.rkey = mr->rkey;
647 resp.mr_handle = uobj->id;
648
649 if (copy_to_user((void __user *) (unsigned long) cmd.response,
650 &resp, sizeof resp)) {
651 ret = -EFAULT;
652 goto err_copy;
653 }
654
655 put_pd_read(pd);
656
657 mutex_lock(&file->mutex);
658 list_add_tail(&uobj->list, &file->ucontext->mr_list);
659 mutex_unlock(&file->mutex);
660
661 uobj->live = 1;
662
663 up_write(&uobj->mutex);
664
665 return in_len;
666
667 err_copy:
668 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
669
670 err_unreg:
671 ib_dereg_mr(mr);
672
673 err_put:
674 put_pd_read(pd);
675
676 err_free:
677 put_uobj_write(uobj);
678 return ret;
679 }
680
681 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
682 const char __user *buf, int in_len,
683 int out_len)
684 {
685 struct ib_uverbs_dereg_mr cmd;
686 struct ib_mr *mr;
687 struct ib_uobject *uobj;
688 int ret = -EINVAL;
689
690 if (copy_from_user(&cmd, buf, sizeof cmd))
691 return -EFAULT;
692
693 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
694 if (!uobj)
695 return -EINVAL;
696
697 mr = uobj->object;
698
699 ret = ib_dereg_mr(mr);
700 if (!ret)
701 uobj->live = 0;
702
703 put_uobj_write(uobj);
704
705 if (ret)
706 return ret;
707
708 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
709
710 mutex_lock(&file->mutex);
711 list_del(&uobj->list);
712 mutex_unlock(&file->mutex);
713
714 put_uobj(uobj);
715
716 return in_len;
717 }
718
719 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
720 const char __user *buf, int in_len,
721 int out_len)
722 {
723 struct ib_uverbs_create_comp_channel cmd;
724 struct ib_uverbs_create_comp_channel_resp resp;
725 struct file *filp;
726 int ret;
727
728 if (out_len < sizeof resp)
729 return -ENOSPC;
730
731 if (copy_from_user(&cmd, buf, sizeof cmd))
732 return -EFAULT;
733
734 ret = get_unused_fd();
735 if (ret < 0)
736 return ret;
737 resp.fd = ret;
738
739 filp = ib_uverbs_alloc_event_file(file, 0);
740 if (IS_ERR(filp)) {
741 put_unused_fd(resp.fd);
742 return PTR_ERR(filp);
743 }
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 cmd.comp_vector,
804 file->ucontext, &udata);
805 if (IS_ERR(cq)) {
806 ret = PTR_ERR(cq);
807 goto err_file;
808 }
809
810 cq->device = file->device->ib_dev;
811 cq->uobject = &obj->uobject;
812 cq->comp_handler = ib_uverbs_comp_handler;
813 cq->event_handler = ib_uverbs_cq_event_handler;
814 cq->cq_context = ev_file;
815 atomic_set(&cq->usecnt, 0);
816
817 obj->uobject.object = cq;
818 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
819 if (ret)
820 goto err_free;
821
822 memset(&resp, 0, sizeof resp);
823 resp.cq_handle = obj->uobject.id;
824 resp.cqe = cq->cqe;
825
826 if (copy_to_user((void __user *) (unsigned long) cmd.response,
827 &resp, sizeof resp)) {
828 ret = -EFAULT;
829 goto err_copy;
830 }
831
832 mutex_lock(&file->mutex);
833 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
834 mutex_unlock(&file->mutex);
835
836 obj->uobject.live = 1;
837
838 up_write(&obj->uobject.mutex);
839
840 return in_len;
841
842 err_copy:
843 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
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 resp.cqe = cq->cqe;
883
884 if (copy_to_user((void __user *) (unsigned long) cmd.response,
885 &resp, sizeof resp.cqe))
886 ret = -EFAULT;
887
888 out:
889 put_cq_read(cq);
890
891 return ret ? ret : in_len;
892 }
893
894 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
895 {
896 struct ib_uverbs_wc tmp;
897
898 tmp.wr_id = wc->wr_id;
899 tmp.status = wc->status;
900 tmp.opcode = wc->opcode;
901 tmp.vendor_err = wc->vendor_err;
902 tmp.byte_len = wc->byte_len;
903 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
904 tmp.qp_num = wc->qp->qp_num;
905 tmp.src_qp = wc->src_qp;
906 tmp.wc_flags = wc->wc_flags;
907 tmp.pkey_index = wc->pkey_index;
908 tmp.slid = wc->slid;
909 tmp.sl = wc->sl;
910 tmp.dlid_path_bits = wc->dlid_path_bits;
911 tmp.port_num = wc->port_num;
912 tmp.reserved = 0;
913
914 if (copy_to_user(dest, &tmp, sizeof tmp))
915 return -EFAULT;
916
917 return 0;
918 }
919
920 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
921 const char __user *buf, int in_len,
922 int out_len)
923 {
924 struct ib_uverbs_poll_cq cmd;
925 struct ib_uverbs_poll_cq_resp resp;
926 u8 __user *header_ptr;
927 u8 __user *data_ptr;
928 struct ib_cq *cq;
929 struct ib_wc wc;
930 int ret;
931
932 if (copy_from_user(&cmd, buf, sizeof cmd))
933 return -EFAULT;
934
935 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
936 if (!cq)
937 return -EINVAL;
938
939 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
940 header_ptr = (void __user *)(unsigned long) cmd.response;
941 data_ptr = header_ptr + sizeof resp;
942
943 memset(&resp, 0, sizeof resp);
944 while (resp.count < cmd.ne) {
945 ret = ib_poll_cq(cq, 1, &wc);
946 if (ret < 0)
947 goto out_put;
948 if (!ret)
949 break;
950
951 ret = copy_wc_to_user(data_ptr, &wc);
952 if (ret)
953 goto out_put;
954
955 data_ptr += sizeof(struct ib_uverbs_wc);
956 ++resp.count;
957 }
958
959 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
960 ret = -EFAULT;
961 goto out_put;
962 }
963
964 ret = in_len;
965
966 out_put:
967 put_cq_read(cq);
968 return ret;
969 }
970
971 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
972 const char __user *buf, int in_len,
973 int out_len)
974 {
975 struct ib_uverbs_req_notify_cq cmd;
976 struct ib_cq *cq;
977
978 if (copy_from_user(&cmd, buf, sizeof cmd))
979 return -EFAULT;
980
981 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
982 if (!cq)
983 return -EINVAL;
984
985 ib_req_notify_cq(cq, cmd.solicited_only ?
986 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
987
988 put_cq_read(cq);
989
990 return in_len;
991 }
992
993 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
994 const char __user *buf, int in_len,
995 int out_len)
996 {
997 struct ib_uverbs_destroy_cq cmd;
998 struct ib_uverbs_destroy_cq_resp resp;
999 struct ib_uobject *uobj;
1000 struct ib_cq *cq;
1001 struct ib_ucq_object *obj;
1002 struct ib_uverbs_event_file *ev_file;
1003 int ret = -EINVAL;
1004
1005 if (copy_from_user(&cmd, buf, sizeof cmd))
1006 return -EFAULT;
1007
1008 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1009 if (!uobj)
1010 return -EINVAL;
1011 cq = uobj->object;
1012 ev_file = cq->cq_context;
1013 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1014
1015 ret = ib_destroy_cq(cq);
1016 if (!ret)
1017 uobj->live = 0;
1018
1019 put_uobj_write(uobj);
1020
1021 if (ret)
1022 return ret;
1023
1024 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1025
1026 mutex_lock(&file->mutex);
1027 list_del(&uobj->list);
1028 mutex_unlock(&file->mutex);
1029
1030 ib_uverbs_release_ucq(file, ev_file, obj);
1031
1032 memset(&resp, 0, sizeof resp);
1033 resp.comp_events_reported = obj->comp_events_reported;
1034 resp.async_events_reported = obj->async_events_reported;
1035
1036 put_uobj(uobj);
1037
1038 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1039 &resp, sizeof resp))
1040 return -EFAULT;
1041
1042 return in_len;
1043 }
1044
1045 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1046 const char __user *buf, int in_len,
1047 int out_len)
1048 {
1049 struct ib_uverbs_create_qp cmd;
1050 struct ib_uverbs_create_qp_resp resp;
1051 struct ib_udata udata;
1052 struct ib_uqp_object *obj;
1053 struct ib_pd *pd;
1054 struct ib_cq *scq, *rcq;
1055 struct ib_srq *srq;
1056 struct ib_qp *qp;
1057 struct ib_qp_init_attr attr;
1058 int ret;
1059
1060 if (out_len < sizeof resp)
1061 return -ENOSPC;
1062
1063 if (copy_from_user(&cmd, buf, sizeof cmd))
1064 return -EFAULT;
1065
1066 INIT_UDATA(&udata, buf + sizeof cmd,
1067 (unsigned long) cmd.response + sizeof resp,
1068 in_len - sizeof cmd, out_len - sizeof resp);
1069
1070 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1071 if (!obj)
1072 return -ENOMEM;
1073
1074 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1075 down_write(&obj->uevent.uobject.mutex);
1076
1077 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1078 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1079 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1080 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1081 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1082
1083 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1084 ret = -EINVAL;
1085 goto err_put;
1086 }
1087
1088 attr.event_handler = ib_uverbs_qp_event_handler;
1089 attr.qp_context = file;
1090 attr.send_cq = scq;
1091 attr.recv_cq = rcq;
1092 attr.srq = srq;
1093 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1094 attr.qp_type = cmd.qp_type;
1095 attr.create_flags = 0;
1096
1097 attr.cap.max_send_wr = cmd.max_send_wr;
1098 attr.cap.max_recv_wr = cmd.max_recv_wr;
1099 attr.cap.max_send_sge = cmd.max_send_sge;
1100 attr.cap.max_recv_sge = cmd.max_recv_sge;
1101 attr.cap.max_inline_data = cmd.max_inline_data;
1102
1103 obj->uevent.events_reported = 0;
1104 INIT_LIST_HEAD(&obj->uevent.event_list);
1105 INIT_LIST_HEAD(&obj->mcast_list);
1106
1107 qp = pd->device->create_qp(pd, &attr, &udata);
1108 if (IS_ERR(qp)) {
1109 ret = PTR_ERR(qp);
1110 goto err_put;
1111 }
1112
1113 qp->device = pd->device;
1114 qp->pd = pd;
1115 qp->send_cq = attr.send_cq;
1116 qp->recv_cq = attr.recv_cq;
1117 qp->srq = attr.srq;
1118 qp->uobject = &obj->uevent.uobject;
1119 qp->event_handler = attr.event_handler;
1120 qp->qp_context = attr.qp_context;
1121 qp->qp_type = attr.qp_type;
1122 atomic_inc(&pd->usecnt);
1123 atomic_inc(&attr.send_cq->usecnt);
1124 atomic_inc(&attr.recv_cq->usecnt);
1125 if (attr.srq)
1126 atomic_inc(&attr.srq->usecnt);
1127
1128 obj->uevent.uobject.object = qp;
1129 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1130 if (ret)
1131 goto err_destroy;
1132
1133 memset(&resp, 0, sizeof resp);
1134 resp.qpn = qp->qp_num;
1135 resp.qp_handle = obj->uevent.uobject.id;
1136 resp.max_recv_sge = attr.cap.max_recv_sge;
1137 resp.max_send_sge = attr.cap.max_send_sge;
1138 resp.max_recv_wr = attr.cap.max_recv_wr;
1139 resp.max_send_wr = attr.cap.max_send_wr;
1140 resp.max_inline_data = attr.cap.max_inline_data;
1141
1142 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1143 &resp, sizeof resp)) {
1144 ret = -EFAULT;
1145 goto err_copy;
1146 }
1147
1148 put_pd_read(pd);
1149 put_cq_read(scq);
1150 if (rcq != scq)
1151 put_cq_read(rcq);
1152 if (srq)
1153 put_srq_read(srq);
1154
1155 mutex_lock(&file->mutex);
1156 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1157 mutex_unlock(&file->mutex);
1158
1159 obj->uevent.uobject.live = 1;
1160
1161 up_write(&obj->uevent.uobject.mutex);
1162
1163 return in_len;
1164
1165 err_copy:
1166 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1167
1168 err_destroy:
1169 ib_destroy_qp(qp);
1170
1171 err_put:
1172 if (pd)
1173 put_pd_read(pd);
1174 if (scq)
1175 put_cq_read(scq);
1176 if (rcq && rcq != scq)
1177 put_cq_read(rcq);
1178 if (srq)
1179 put_srq_read(srq);
1180
1181 put_uobj_write(&obj->uevent.uobject);
1182 return ret;
1183 }
1184
1185 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1186 const char __user *buf, int in_len,
1187 int out_len)
1188 {
1189 struct ib_uverbs_query_qp cmd;
1190 struct ib_uverbs_query_qp_resp resp;
1191 struct ib_qp *qp;
1192 struct ib_qp_attr *attr;
1193 struct ib_qp_init_attr *init_attr;
1194 int ret;
1195
1196 if (copy_from_user(&cmd, buf, sizeof cmd))
1197 return -EFAULT;
1198
1199 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1200 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1201 if (!attr || !init_attr) {
1202 ret = -ENOMEM;
1203 goto out;
1204 }
1205
1206 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1207 if (!qp) {
1208 ret = -EINVAL;
1209 goto out;
1210 }
1211
1212 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1213
1214 put_qp_read(qp);
1215
1216 if (ret)
1217 goto out;
1218
1219 memset(&resp, 0, sizeof resp);
1220
1221 resp.qp_state = attr->qp_state;
1222 resp.cur_qp_state = attr->cur_qp_state;
1223 resp.path_mtu = attr->path_mtu;
1224 resp.path_mig_state = attr->path_mig_state;
1225 resp.qkey = attr->qkey;
1226 resp.rq_psn = attr->rq_psn;
1227 resp.sq_psn = attr->sq_psn;
1228 resp.dest_qp_num = attr->dest_qp_num;
1229 resp.qp_access_flags = attr->qp_access_flags;
1230 resp.pkey_index = attr->pkey_index;
1231 resp.alt_pkey_index = attr->alt_pkey_index;
1232 resp.sq_draining = attr->sq_draining;
1233 resp.max_rd_atomic = attr->max_rd_atomic;
1234 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1235 resp.min_rnr_timer = attr->min_rnr_timer;
1236 resp.port_num = attr->port_num;
1237 resp.timeout = attr->timeout;
1238 resp.retry_cnt = attr->retry_cnt;
1239 resp.rnr_retry = attr->rnr_retry;
1240 resp.alt_port_num = attr->alt_port_num;
1241 resp.alt_timeout = attr->alt_timeout;
1242
1243 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1244 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1245 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1246 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1247 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1248 resp.dest.dlid = attr->ah_attr.dlid;
1249 resp.dest.sl = attr->ah_attr.sl;
1250 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1251 resp.dest.static_rate = attr->ah_attr.static_rate;
1252 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1253 resp.dest.port_num = attr->ah_attr.port_num;
1254
1255 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1256 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1257 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1258 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1259 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1260 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1261 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1262 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1263 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1264 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1265 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1266
1267 resp.max_send_wr = init_attr->cap.max_send_wr;
1268 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1269 resp.max_send_sge = init_attr->cap.max_send_sge;
1270 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1271 resp.max_inline_data = init_attr->cap.max_inline_data;
1272 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1273
1274 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1275 &resp, sizeof resp))
1276 ret = -EFAULT;
1277
1278 out:
1279 kfree(attr);
1280 kfree(init_attr);
1281
1282 return ret ? ret : in_len;
1283 }
1284
1285 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1286 const char __user *buf, int in_len,
1287 int out_len)
1288 {
1289 struct ib_uverbs_modify_qp cmd;
1290 struct ib_udata udata;
1291 struct ib_qp *qp;
1292 struct ib_qp_attr *attr;
1293 int ret;
1294
1295 if (copy_from_user(&cmd, buf, sizeof cmd))
1296 return -EFAULT;
1297
1298 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1299 out_len);
1300
1301 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1302 if (!attr)
1303 return -ENOMEM;
1304
1305 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1306 if (!qp) {
1307 ret = -EINVAL;
1308 goto out;
1309 }
1310
1311 attr->qp_state = cmd.qp_state;
1312 attr->cur_qp_state = cmd.cur_qp_state;
1313 attr->path_mtu = cmd.path_mtu;
1314 attr->path_mig_state = cmd.path_mig_state;
1315 attr->qkey = cmd.qkey;
1316 attr->rq_psn = cmd.rq_psn;
1317 attr->sq_psn = cmd.sq_psn;
1318 attr->dest_qp_num = cmd.dest_qp_num;
1319 attr->qp_access_flags = cmd.qp_access_flags;
1320 attr->pkey_index = cmd.pkey_index;
1321 attr->alt_pkey_index = cmd.alt_pkey_index;
1322 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1323 attr->max_rd_atomic = cmd.max_rd_atomic;
1324 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1325 attr->min_rnr_timer = cmd.min_rnr_timer;
1326 attr->port_num = cmd.port_num;
1327 attr->timeout = cmd.timeout;
1328 attr->retry_cnt = cmd.retry_cnt;
1329 attr->rnr_retry = cmd.rnr_retry;
1330 attr->alt_port_num = cmd.alt_port_num;
1331 attr->alt_timeout = cmd.alt_timeout;
1332
1333 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1334 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1335 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1336 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1337 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1338 attr->ah_attr.dlid = cmd.dest.dlid;
1339 attr->ah_attr.sl = cmd.dest.sl;
1340 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1341 attr->ah_attr.static_rate = cmd.dest.static_rate;
1342 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1343 attr->ah_attr.port_num = cmd.dest.port_num;
1344
1345 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1346 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1347 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1348 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1349 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1350 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1351 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1352 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1353 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1354 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1355 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1356
1357 ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1358
1359 put_qp_read(qp);
1360
1361 if (ret)
1362 goto out;
1363
1364 ret = in_len;
1365
1366 out:
1367 kfree(attr);
1368
1369 return ret;
1370 }
1371
1372 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1373 const char __user *buf, int in_len,
1374 int out_len)
1375 {
1376 struct ib_uverbs_destroy_qp cmd;
1377 struct ib_uverbs_destroy_qp_resp resp;
1378 struct ib_uobject *uobj;
1379 struct ib_qp *qp;
1380 struct ib_uqp_object *obj;
1381 int ret = -EINVAL;
1382
1383 if (copy_from_user(&cmd, buf, sizeof cmd))
1384 return -EFAULT;
1385
1386 memset(&resp, 0, sizeof resp);
1387
1388 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1389 if (!uobj)
1390 return -EINVAL;
1391 qp = uobj->object;
1392 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1393
1394 if (!list_empty(&obj->mcast_list)) {
1395 put_uobj_write(uobj);
1396 return -EBUSY;
1397 }
1398
1399 ret = ib_destroy_qp(qp);
1400 if (!ret)
1401 uobj->live = 0;
1402
1403 put_uobj_write(uobj);
1404
1405 if (ret)
1406 return ret;
1407
1408 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1409
1410 mutex_lock(&file->mutex);
1411 list_del(&uobj->list);
1412 mutex_unlock(&file->mutex);
1413
1414 ib_uverbs_release_uevent(file, &obj->uevent);
1415
1416 resp.events_reported = obj->uevent.events_reported;
1417
1418 put_uobj(uobj);
1419
1420 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1421 &resp, sizeof resp))
1422 return -EFAULT;
1423
1424 return in_len;
1425 }
1426
1427 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1428 const char __user *buf, int in_len,
1429 int out_len)
1430 {
1431 struct ib_uverbs_post_send cmd;
1432 struct ib_uverbs_post_send_resp resp;
1433 struct ib_uverbs_send_wr *user_wr;
1434 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1435 struct ib_qp *qp;
1436 int i, sg_ind;
1437 int is_ud;
1438 ssize_t ret = -EINVAL;
1439
1440 if (copy_from_user(&cmd, buf, sizeof cmd))
1441 return -EFAULT;
1442
1443 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1444 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1445 return -EINVAL;
1446
1447 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1448 return -EINVAL;
1449
1450 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1451 if (!user_wr)
1452 return -ENOMEM;
1453
1454 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1455 if (!qp)
1456 goto out;
1457
1458 is_ud = qp->qp_type == IB_QPT_UD;
1459 sg_ind = 0;
1460 last = NULL;
1461 for (i = 0; i < cmd.wr_count; ++i) {
1462 if (copy_from_user(user_wr,
1463 buf + sizeof cmd + i * cmd.wqe_size,
1464 cmd.wqe_size)) {
1465 ret = -EFAULT;
1466 goto out_put;
1467 }
1468
1469 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1470 ret = -EINVAL;
1471 goto out_put;
1472 }
1473
1474 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1475 user_wr->num_sge * sizeof (struct ib_sge),
1476 GFP_KERNEL);
1477 if (!next) {
1478 ret = -ENOMEM;
1479 goto out_put;
1480 }
1481
1482 if (!last)
1483 wr = next;
1484 else
1485 last->next = next;
1486 last = next;
1487
1488 next->next = NULL;
1489 next->wr_id = user_wr->wr_id;
1490 next->num_sge = user_wr->num_sge;
1491 next->opcode = user_wr->opcode;
1492 next->send_flags = user_wr->send_flags;
1493
1494 if (is_ud) {
1495 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1496 file->ucontext);
1497 if (!next->wr.ud.ah) {
1498 ret = -EINVAL;
1499 goto out_put;
1500 }
1501 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1502 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1503 } else {
1504 switch (next->opcode) {
1505 case IB_WR_RDMA_WRITE_WITH_IMM:
1506 next->ex.imm_data =
1507 (__be32 __force) user_wr->ex.imm_data;
1508 case IB_WR_RDMA_WRITE:
1509 case IB_WR_RDMA_READ:
1510 next->wr.rdma.remote_addr =
1511 user_wr->wr.rdma.remote_addr;
1512 next->wr.rdma.rkey =
1513 user_wr->wr.rdma.rkey;
1514 break;
1515 case IB_WR_SEND_WITH_IMM:
1516 next->ex.imm_data =
1517 (__be32 __force) user_wr->ex.imm_data;
1518 break;
1519 case IB_WR_SEND_WITH_INV:
1520 next->ex.invalidate_rkey =
1521 user_wr->ex.invalidate_rkey;
1522 break;
1523 case IB_WR_ATOMIC_CMP_AND_SWP:
1524 case IB_WR_ATOMIC_FETCH_AND_ADD:
1525 next->wr.atomic.remote_addr =
1526 user_wr->wr.atomic.remote_addr;
1527 next->wr.atomic.compare_add =
1528 user_wr->wr.atomic.compare_add;
1529 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1530 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1531 break;
1532 default:
1533 break;
1534 }
1535 }
1536
1537 if (next->num_sge) {
1538 next->sg_list = (void *) next +
1539 ALIGN(sizeof *next, sizeof (struct ib_sge));
1540 if (copy_from_user(next->sg_list,
1541 buf + sizeof cmd +
1542 cmd.wr_count * cmd.wqe_size +
1543 sg_ind * sizeof (struct ib_sge),
1544 next->num_sge * sizeof (struct ib_sge))) {
1545 ret = -EFAULT;
1546 goto out_put;
1547 }
1548 sg_ind += next->num_sge;
1549 } else
1550 next->sg_list = NULL;
1551 }
1552
1553 resp.bad_wr = 0;
1554 ret = qp->device->post_send(qp, wr, &bad_wr);
1555 if (ret)
1556 for (next = wr; next; next = next->next) {
1557 ++resp.bad_wr;
1558 if (next == bad_wr)
1559 break;
1560 }
1561
1562 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1563 &resp, sizeof resp))
1564 ret = -EFAULT;
1565
1566 out_put:
1567 put_qp_read(qp);
1568
1569 while (wr) {
1570 if (is_ud && wr->wr.ud.ah)
1571 put_ah_read(wr->wr.ud.ah);
1572 next = wr->next;
1573 kfree(wr);
1574 wr = next;
1575 }
1576
1577 out:
1578 kfree(user_wr);
1579
1580 return ret ? ret : in_len;
1581 }
1582
1583 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1584 int in_len,
1585 u32 wr_count,
1586 u32 sge_count,
1587 u32 wqe_size)
1588 {
1589 struct ib_uverbs_recv_wr *user_wr;
1590 struct ib_recv_wr *wr = NULL, *last, *next;
1591 int sg_ind;
1592 int i;
1593 int ret;
1594
1595 if (in_len < wqe_size * wr_count +
1596 sge_count * sizeof (struct ib_uverbs_sge))
1597 return ERR_PTR(-EINVAL);
1598
1599 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1600 return ERR_PTR(-EINVAL);
1601
1602 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1603 if (!user_wr)
1604 return ERR_PTR(-ENOMEM);
1605
1606 sg_ind = 0;
1607 last = NULL;
1608 for (i = 0; i < wr_count; ++i) {
1609 if (copy_from_user(user_wr, buf + i * wqe_size,
1610 wqe_size)) {
1611 ret = -EFAULT;
1612 goto err;
1613 }
1614
1615 if (user_wr->num_sge + sg_ind > sge_count) {
1616 ret = -EINVAL;
1617 goto err;
1618 }
1619
1620 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1621 user_wr->num_sge * sizeof (struct ib_sge),
1622 GFP_KERNEL);
1623 if (!next) {
1624 ret = -ENOMEM;
1625 goto err;
1626 }
1627
1628 if (!last)
1629 wr = next;
1630 else
1631 last->next = next;
1632 last = next;
1633
1634 next->next = NULL;
1635 next->wr_id = user_wr->wr_id;
1636 next->num_sge = user_wr->num_sge;
1637
1638 if (next->num_sge) {
1639 next->sg_list = (void *) next +
1640 ALIGN(sizeof *next, sizeof (struct ib_sge));
1641 if (copy_from_user(next->sg_list,
1642 buf + wr_count * wqe_size +
1643 sg_ind * sizeof (struct ib_sge),
1644 next->num_sge * sizeof (struct ib_sge))) {
1645 ret = -EFAULT;
1646 goto err;
1647 }
1648 sg_ind += next->num_sge;
1649 } else
1650 next->sg_list = NULL;
1651 }
1652
1653 kfree(user_wr);
1654 return wr;
1655
1656 err:
1657 kfree(user_wr);
1658
1659 while (wr) {
1660 next = wr->next;
1661 kfree(wr);
1662 wr = next;
1663 }
1664
1665 return ERR_PTR(ret);
1666 }
1667
1668 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1669 const char __user *buf, int in_len,
1670 int out_len)
1671 {
1672 struct ib_uverbs_post_recv cmd;
1673 struct ib_uverbs_post_recv_resp resp;
1674 struct ib_recv_wr *wr, *next, *bad_wr;
1675 struct ib_qp *qp;
1676 ssize_t ret = -EINVAL;
1677
1678 if (copy_from_user(&cmd, buf, sizeof cmd))
1679 return -EFAULT;
1680
1681 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1682 in_len - sizeof cmd, cmd.wr_count,
1683 cmd.sge_count, cmd.wqe_size);
1684 if (IS_ERR(wr))
1685 return PTR_ERR(wr);
1686
1687 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1688 if (!qp)
1689 goto out;
1690
1691 resp.bad_wr = 0;
1692 ret = qp->device->post_recv(qp, wr, &bad_wr);
1693
1694 put_qp_read(qp);
1695
1696 if (ret)
1697 for (next = wr; next; next = next->next) {
1698 ++resp.bad_wr;
1699 if (next == bad_wr)
1700 break;
1701 }
1702
1703 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1704 &resp, sizeof resp))
1705 ret = -EFAULT;
1706
1707 out:
1708 while (wr) {
1709 next = wr->next;
1710 kfree(wr);
1711 wr = next;
1712 }
1713
1714 return ret ? ret : in_len;
1715 }
1716
1717 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1718 const char __user *buf, int in_len,
1719 int out_len)
1720 {
1721 struct ib_uverbs_post_srq_recv cmd;
1722 struct ib_uverbs_post_srq_recv_resp resp;
1723 struct ib_recv_wr *wr, *next, *bad_wr;
1724 struct ib_srq *srq;
1725 ssize_t ret = -EINVAL;
1726
1727 if (copy_from_user(&cmd, buf, sizeof cmd))
1728 return -EFAULT;
1729
1730 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1731 in_len - sizeof cmd, cmd.wr_count,
1732 cmd.sge_count, cmd.wqe_size);
1733 if (IS_ERR(wr))
1734 return PTR_ERR(wr);
1735
1736 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1737 if (!srq)
1738 goto out;
1739
1740 resp.bad_wr = 0;
1741 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1742
1743 put_srq_read(srq);
1744
1745 if (ret)
1746 for (next = wr; next; next = next->next) {
1747 ++resp.bad_wr;
1748 if (next == bad_wr)
1749 break;
1750 }
1751
1752 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1753 &resp, sizeof resp))
1754 ret = -EFAULT;
1755
1756 out:
1757 while (wr) {
1758 next = wr->next;
1759 kfree(wr);
1760 wr = next;
1761 }
1762
1763 return ret ? ret : in_len;
1764 }
1765
1766 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1767 const char __user *buf, int in_len,
1768 int out_len)
1769 {
1770 struct ib_uverbs_create_ah cmd;
1771 struct ib_uverbs_create_ah_resp resp;
1772 struct ib_uobject *uobj;
1773 struct ib_pd *pd;
1774 struct ib_ah *ah;
1775 struct ib_ah_attr attr;
1776 int ret;
1777
1778 if (out_len < sizeof resp)
1779 return -ENOSPC;
1780
1781 if (copy_from_user(&cmd, buf, sizeof cmd))
1782 return -EFAULT;
1783
1784 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1785 if (!uobj)
1786 return -ENOMEM;
1787
1788 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1789 down_write(&uobj->mutex);
1790
1791 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1792 if (!pd) {
1793 ret = -EINVAL;
1794 goto err;
1795 }
1796
1797 attr.dlid = cmd.attr.dlid;
1798 attr.sl = cmd.attr.sl;
1799 attr.src_path_bits = cmd.attr.src_path_bits;
1800 attr.static_rate = cmd.attr.static_rate;
1801 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
1802 attr.port_num = cmd.attr.port_num;
1803 attr.grh.flow_label = cmd.attr.grh.flow_label;
1804 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1805 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1806 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1807 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1808
1809 ah = ib_create_ah(pd, &attr);
1810 if (IS_ERR(ah)) {
1811 ret = PTR_ERR(ah);
1812 goto err_put;
1813 }
1814
1815 ah->uobject = uobj;
1816 uobj->object = ah;
1817
1818 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1819 if (ret)
1820 goto err_destroy;
1821
1822 resp.ah_handle = uobj->id;
1823
1824 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1825 &resp, sizeof resp)) {
1826 ret = -EFAULT;
1827 goto err_copy;
1828 }
1829
1830 put_pd_read(pd);
1831
1832 mutex_lock(&file->mutex);
1833 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1834 mutex_unlock(&file->mutex);
1835
1836 uobj->live = 1;
1837
1838 up_write(&uobj->mutex);
1839
1840 return in_len;
1841
1842 err_copy:
1843 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1844
1845 err_destroy:
1846 ib_destroy_ah(ah);
1847
1848 err_put:
1849 put_pd_read(pd);
1850
1851 err:
1852 put_uobj_write(uobj);
1853 return ret;
1854 }
1855
1856 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1857 const char __user *buf, int in_len, int out_len)
1858 {
1859 struct ib_uverbs_destroy_ah cmd;
1860 struct ib_ah *ah;
1861 struct ib_uobject *uobj;
1862 int ret;
1863
1864 if (copy_from_user(&cmd, buf, sizeof cmd))
1865 return -EFAULT;
1866
1867 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1868 if (!uobj)
1869 return -EINVAL;
1870 ah = uobj->object;
1871
1872 ret = ib_destroy_ah(ah);
1873 if (!ret)
1874 uobj->live = 0;
1875
1876 put_uobj_write(uobj);
1877
1878 if (ret)
1879 return ret;
1880
1881 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1882
1883 mutex_lock(&file->mutex);
1884 list_del(&uobj->list);
1885 mutex_unlock(&file->mutex);
1886
1887 put_uobj(uobj);
1888
1889 return in_len;
1890 }
1891
1892 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1893 const char __user *buf, int in_len,
1894 int out_len)
1895 {
1896 struct ib_uverbs_attach_mcast cmd;
1897 struct ib_qp *qp;
1898 struct ib_uqp_object *obj;
1899 struct ib_uverbs_mcast_entry *mcast;
1900 int ret;
1901
1902 if (copy_from_user(&cmd, buf, sizeof cmd))
1903 return -EFAULT;
1904
1905 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1906 if (!qp)
1907 return -EINVAL;
1908
1909 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1910
1911 list_for_each_entry(mcast, &obj->mcast_list, list)
1912 if (cmd.mlid == mcast->lid &&
1913 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1914 ret = 0;
1915 goto out_put;
1916 }
1917
1918 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1919 if (!mcast) {
1920 ret = -ENOMEM;
1921 goto out_put;
1922 }
1923
1924 mcast->lid = cmd.mlid;
1925 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1926
1927 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1928 if (!ret)
1929 list_add_tail(&mcast->list, &obj->mcast_list);
1930 else
1931 kfree(mcast);
1932
1933 out_put:
1934 put_qp_read(qp);
1935
1936 return ret ? ret : in_len;
1937 }
1938
1939 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1940 const char __user *buf, int in_len,
1941 int out_len)
1942 {
1943 struct ib_uverbs_detach_mcast cmd;
1944 struct ib_uqp_object *obj;
1945 struct ib_qp *qp;
1946 struct ib_uverbs_mcast_entry *mcast;
1947 int ret = -EINVAL;
1948
1949 if (copy_from_user(&cmd, buf, sizeof cmd))
1950 return -EFAULT;
1951
1952 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1953 if (!qp)
1954 return -EINVAL;
1955
1956 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1957 if (ret)
1958 goto out_put;
1959
1960 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1961
1962 list_for_each_entry(mcast, &obj->mcast_list, list)
1963 if (cmd.mlid == mcast->lid &&
1964 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1965 list_del(&mcast->list);
1966 kfree(mcast);
1967 break;
1968 }
1969
1970 out_put:
1971 put_qp_read(qp);
1972
1973 return ret ? ret : in_len;
1974 }
1975
1976 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1977 const char __user *buf, int in_len,
1978 int out_len)
1979 {
1980 struct ib_uverbs_create_srq cmd;
1981 struct ib_uverbs_create_srq_resp resp;
1982 struct ib_udata udata;
1983 struct ib_uevent_object *obj;
1984 struct ib_pd *pd;
1985 struct ib_srq *srq;
1986 struct ib_srq_init_attr attr;
1987 int ret;
1988
1989 if (out_len < sizeof resp)
1990 return -ENOSPC;
1991
1992 if (copy_from_user(&cmd, buf, sizeof cmd))
1993 return -EFAULT;
1994
1995 INIT_UDATA(&udata, buf + sizeof cmd,
1996 (unsigned long) cmd.response + sizeof resp,
1997 in_len - sizeof cmd, out_len - sizeof resp);
1998
1999 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2000 if (!obj)
2001 return -ENOMEM;
2002
2003 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
2004 down_write(&obj->uobject.mutex);
2005
2006 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2007 if (!pd) {
2008 ret = -EINVAL;
2009 goto err;
2010 }
2011
2012 attr.event_handler = ib_uverbs_srq_event_handler;
2013 attr.srq_context = file;
2014 attr.attr.max_wr = cmd.max_wr;
2015 attr.attr.max_sge = cmd.max_sge;
2016 attr.attr.srq_limit = cmd.srq_limit;
2017
2018 obj->events_reported = 0;
2019 INIT_LIST_HEAD(&obj->event_list);
2020
2021 srq = pd->device->create_srq(pd, &attr, &udata);
2022 if (IS_ERR(srq)) {
2023 ret = PTR_ERR(srq);
2024 goto err_put;
2025 }
2026
2027 srq->device = pd->device;
2028 srq->pd = pd;
2029 srq->uobject = &obj->uobject;
2030 srq->event_handler = attr.event_handler;
2031 srq->srq_context = attr.srq_context;
2032 atomic_inc(&pd->usecnt);
2033 atomic_set(&srq->usecnt, 0);
2034
2035 obj->uobject.object = srq;
2036 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2037 if (ret)
2038 goto err_destroy;
2039
2040 memset(&resp, 0, sizeof resp);
2041 resp.srq_handle = obj->uobject.id;
2042 resp.max_wr = attr.attr.max_wr;
2043 resp.max_sge = attr.attr.max_sge;
2044
2045 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2046 &resp, sizeof resp)) {
2047 ret = -EFAULT;
2048 goto err_copy;
2049 }
2050
2051 put_pd_read(pd);
2052
2053 mutex_lock(&file->mutex);
2054 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2055 mutex_unlock(&file->mutex);
2056
2057 obj->uobject.live = 1;
2058
2059 up_write(&obj->uobject.mutex);
2060
2061 return in_len;
2062
2063 err_copy:
2064 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2065
2066 err_destroy:
2067 ib_destroy_srq(srq);
2068
2069 err_put:
2070 put_pd_read(pd);
2071
2072 err:
2073 put_uobj_write(&obj->uobject);
2074 return ret;
2075 }
2076
2077 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2078 const char __user *buf, int in_len,
2079 int out_len)
2080 {
2081 struct ib_uverbs_modify_srq cmd;
2082 struct ib_udata udata;
2083 struct ib_srq *srq;
2084 struct ib_srq_attr attr;
2085 int ret;
2086
2087 if (copy_from_user(&cmd, buf, sizeof cmd))
2088 return -EFAULT;
2089
2090 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2091 out_len);
2092
2093 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2094 if (!srq)
2095 return -EINVAL;
2096
2097 attr.max_wr = cmd.max_wr;
2098 attr.srq_limit = cmd.srq_limit;
2099
2100 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2101
2102 put_srq_read(srq);
2103
2104 return ret ? ret : in_len;
2105 }
2106
2107 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2108 const char __user *buf,
2109 int in_len, int out_len)
2110 {
2111 struct ib_uverbs_query_srq cmd;
2112 struct ib_uverbs_query_srq_resp resp;
2113 struct ib_srq_attr attr;
2114 struct ib_srq *srq;
2115 int ret;
2116
2117 if (out_len < sizeof resp)
2118 return -ENOSPC;
2119
2120 if (copy_from_user(&cmd, buf, sizeof cmd))
2121 return -EFAULT;
2122
2123 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2124 if (!srq)
2125 return -EINVAL;
2126
2127 ret = ib_query_srq(srq, &attr);
2128
2129 put_srq_read(srq);
2130
2131 if (ret)
2132 return ret;
2133
2134 memset(&resp, 0, sizeof resp);
2135
2136 resp.max_wr = attr.max_wr;
2137 resp.max_sge = attr.max_sge;
2138 resp.srq_limit = attr.srq_limit;
2139
2140 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2141 &resp, sizeof resp))
2142 return -EFAULT;
2143
2144 return in_len;
2145 }
2146
2147 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2148 const char __user *buf, int in_len,
2149 int out_len)
2150 {
2151 struct ib_uverbs_destroy_srq cmd;
2152 struct ib_uverbs_destroy_srq_resp resp;
2153 struct ib_uobject *uobj;
2154 struct ib_srq *srq;
2155 struct ib_uevent_object *obj;
2156 int ret = -EINVAL;
2157
2158 if (copy_from_user(&cmd, buf, sizeof cmd))
2159 return -EFAULT;
2160
2161 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2162 if (!uobj)
2163 return -EINVAL;
2164 srq = uobj->object;
2165 obj = container_of(uobj, struct ib_uevent_object, uobject);
2166
2167 ret = ib_destroy_srq(srq);
2168 if (!ret)
2169 uobj->live = 0;
2170
2171 put_uobj_write(uobj);
2172
2173 if (ret)
2174 return ret;
2175
2176 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2177
2178 mutex_lock(&file->mutex);
2179 list_del(&uobj->list);
2180 mutex_unlock(&file->mutex);
2181
2182 ib_uverbs_release_uevent(file, obj);
2183
2184 memset(&resp, 0, sizeof resp);
2185 resp.events_reported = obj->events_reported;
2186
2187 put_uobj(uobj);
2188
2189 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2190 &resp, sizeof resp))
2191 ret = -EFAULT;
2192
2193 return ret ? ret : in_len;
2194 }
Tomato firmware and modifications.