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[mirror_ubuntu-artful-kernel.git] / drivers / infiniband / core / uverbs_cmd.c
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
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 struct uverbs_lock_class {
45 struct lock_class_key key;
46 char name[16];
47 };
48
49 static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" };
50 static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" };
51 static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" };
52 static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" };
53 static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" };
54 static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" };
55 static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
56
57 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
58 do { \
59 (udata)->inbuf = (void __user *) (ibuf); \
60 (udata)->outbuf = (void __user *) (obuf); \
61 (udata)->inlen = (ilen); \
62 (udata)->outlen = (olen); \
63 } while (0)
64
65 /*
66 * The ib_uobject locking scheme is as follows:
67 *
68 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
69 * needs to be held during all idr operations. When an object is
70 * looked up, a reference must be taken on the object's kref before
71 * dropping this lock.
72 *
73 * - Each object also has an rwsem. This rwsem must be held for
74 * reading while an operation that uses the object is performed.
75 * For example, while registering an MR, the associated PD's
76 * uobject.mutex must be held for reading. The rwsem must be held
77 * for writing while initializing or destroying an object.
78 *
79 * - In addition, each object has a "live" flag. If this flag is not
80 * set, then lookups of the object will fail even if it is found in
81 * the idr. This handles a reader that blocks and does not acquire
82 * the rwsem until after the object is destroyed. The destroy
83 * operation will set the live flag to 0 and then drop the rwsem;
84 * this will allow the reader to acquire the rwsem, see that the
85 * live flag is 0, and then drop the rwsem and its reference to
86 * object. The underlying storage will not be freed until the last
87 * reference to the object is dropped.
88 */
89
90 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
91 struct ib_ucontext *context, struct uverbs_lock_class *c)
92 {
93 uobj->user_handle = user_handle;
94 uobj->context = context;
95 kref_init(&uobj->ref);
96 init_rwsem(&uobj->mutex);
97 lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
98 uobj->live = 0;
99 }
100
101 static void release_uobj(struct kref *kref)
102 {
103 kfree(container_of(kref, struct ib_uobject, ref));
104 }
105
106 static void put_uobj(struct ib_uobject *uobj)
107 {
108 kref_put(&uobj->ref, release_uobj);
109 }
110
111 static void put_uobj_read(struct ib_uobject *uobj)
112 {
113 up_read(&uobj->mutex);
114 put_uobj(uobj);
115 }
116
117 static void put_uobj_write(struct ib_uobject *uobj)
118 {
119 up_write(&uobj->mutex);
120 put_uobj(uobj);
121 }
122
123 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
124 {
125 int ret;
126
127 retry:
128 if (!idr_pre_get(idr, GFP_KERNEL))
129 return -ENOMEM;
130
131 spin_lock(&ib_uverbs_idr_lock);
132 ret = idr_get_new(idr, uobj, &uobj->id);
133 spin_unlock(&ib_uverbs_idr_lock);
134
135 if (ret == -EAGAIN)
136 goto retry;
137
138 return ret;
139 }
140
141 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
142 {
143 spin_lock(&ib_uverbs_idr_lock);
144 idr_remove(idr, uobj->id);
145 spin_unlock(&ib_uverbs_idr_lock);
146 }
147
148 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
149 struct ib_ucontext *context)
150 {
151 struct ib_uobject *uobj;
152
153 spin_lock(&ib_uverbs_idr_lock);
154 uobj = idr_find(idr, id);
155 if (uobj) {
156 if (uobj->context == context)
157 kref_get(&uobj->ref);
158 else
159 uobj = NULL;
160 }
161 spin_unlock(&ib_uverbs_idr_lock);
162
163 return uobj;
164 }
165
166 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
167 struct ib_ucontext *context, int nested)
168 {
169 struct ib_uobject *uobj;
170
171 uobj = __idr_get_uobj(idr, id, context);
172 if (!uobj)
173 return NULL;
174
175 if (nested)
176 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
177 else
178 down_read(&uobj->mutex);
179 if (!uobj->live) {
180 put_uobj_read(uobj);
181 return NULL;
182 }
183
184 return uobj;
185 }
186
187 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
188 struct ib_ucontext *context)
189 {
190 struct ib_uobject *uobj;
191
192 uobj = __idr_get_uobj(idr, id, context);
193 if (!uobj)
194 return NULL;
195
196 down_write(&uobj->mutex);
197 if (!uobj->live) {
198 put_uobj_write(uobj);
199 return NULL;
200 }
201
202 return uobj;
203 }
204
205 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
206 int nested)
207 {
208 struct ib_uobject *uobj;
209
210 uobj = idr_read_uobj(idr, id, context, nested);
211 return uobj ? uobj->object : NULL;
212 }
213
214 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
215 {
216 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
217 }
218
219 static void put_pd_read(struct ib_pd *pd)
220 {
221 put_uobj_read(pd->uobject);
222 }
223
224 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
225 {
226 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
227 }
228
229 static void put_cq_read(struct ib_cq *cq)
230 {
231 put_uobj_read(cq->uobject);
232 }
233
234 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
235 {
236 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
237 }
238
239 static void put_ah_read(struct ib_ah *ah)
240 {
241 put_uobj_read(ah->uobject);
242 }
243
244 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
245 {
246 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
247 }
248
249 static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context)
250 {
251 struct ib_uobject *uobj;
252
253 uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context);
254 return uobj ? uobj->object : NULL;
255 }
256
257 static void put_qp_read(struct ib_qp *qp)
258 {
259 put_uobj_read(qp->uobject);
260 }
261
262 static void put_qp_write(struct ib_qp *qp)
263 {
264 put_uobj_write(qp->uobject);
265 }
266
267 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
268 {
269 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
270 }
271
272 static void put_srq_read(struct ib_srq *srq)
273 {
274 put_uobj_read(srq->uobject);
275 }
276
277 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
278 struct ib_uobject **uobj)
279 {
280 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
281 return *uobj ? (*uobj)->object : NULL;
282 }
283
284 static void put_xrcd_read(struct ib_uobject *uobj)
285 {
286 put_uobj_read(uobj);
287 }
288
289 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
290 const char __user *buf,
291 int in_len, int out_len)
292 {
293 struct ib_uverbs_get_context cmd;
294 struct ib_uverbs_get_context_resp resp;
295 struct ib_udata udata;
296 struct ib_device *ibdev = file->device->ib_dev;
297 struct ib_ucontext *ucontext;
298 struct file *filp;
299 int ret;
300
301 if (out_len < sizeof resp)
302 return -ENOSPC;
303
304 if (copy_from_user(&cmd, buf, sizeof cmd))
305 return -EFAULT;
306
307 mutex_lock(&file->mutex);
308
309 if (file->ucontext) {
310 ret = -EINVAL;
311 goto err;
312 }
313
314 INIT_UDATA(&udata, buf + sizeof cmd,
315 (unsigned long) cmd.response + sizeof resp,
316 in_len - sizeof cmd, out_len - sizeof resp);
317
318 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
319 if (IS_ERR(ucontext)) {
320 ret = PTR_ERR(ucontext);
321 goto err;
322 }
323
324 ucontext->device = ibdev;
325 INIT_LIST_HEAD(&ucontext->pd_list);
326 INIT_LIST_HEAD(&ucontext->mr_list);
327 INIT_LIST_HEAD(&ucontext->mw_list);
328 INIT_LIST_HEAD(&ucontext->cq_list);
329 INIT_LIST_HEAD(&ucontext->qp_list);
330 INIT_LIST_HEAD(&ucontext->srq_list);
331 INIT_LIST_HEAD(&ucontext->ah_list);
332 INIT_LIST_HEAD(&ucontext->xrcd_list);
333 ucontext->closing = 0;
334
335 resp.num_comp_vectors = file->device->num_comp_vectors;
336
337 ret = get_unused_fd();
338 if (ret < 0)
339 goto err_free;
340 resp.async_fd = ret;
341
342 filp = ib_uverbs_alloc_event_file(file, 1);
343 if (IS_ERR(filp)) {
344 ret = PTR_ERR(filp);
345 goto err_fd;
346 }
347
348 if (copy_to_user((void __user *) (unsigned long) cmd.response,
349 &resp, sizeof resp)) {
350 ret = -EFAULT;
351 goto err_file;
352 }
353
354 file->async_file = filp->private_data;
355
356 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
357 ib_uverbs_event_handler);
358 ret = ib_register_event_handler(&file->event_handler);
359 if (ret)
360 goto err_file;
361
362 kref_get(&file->async_file->ref);
363 kref_get(&file->ref);
364 file->ucontext = ucontext;
365
366 fd_install(resp.async_fd, filp);
367
368 mutex_unlock(&file->mutex);
369
370 return in_len;
371
372 err_file:
373 fput(filp);
374
375 err_fd:
376 put_unused_fd(resp.async_fd);
377
378 err_free:
379 ibdev->dealloc_ucontext(ucontext);
380
381 err:
382 mutex_unlock(&file->mutex);
383 return ret;
384 }
385
386 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
387 const char __user *buf,
388 int in_len, int out_len)
389 {
390 struct ib_uverbs_query_device cmd;
391 struct ib_uverbs_query_device_resp resp;
392 struct ib_device_attr attr;
393 int ret;
394
395 if (out_len < sizeof resp)
396 return -ENOSPC;
397
398 if (copy_from_user(&cmd, buf, sizeof cmd))
399 return -EFAULT;
400
401 ret = ib_query_device(file->device->ib_dev, &attr);
402 if (ret)
403 return ret;
404
405 memset(&resp, 0, sizeof resp);
406
407 resp.fw_ver = attr.fw_ver;
408 resp.node_guid = file->device->ib_dev->node_guid;
409 resp.sys_image_guid = attr.sys_image_guid;
410 resp.max_mr_size = attr.max_mr_size;
411 resp.page_size_cap = attr.page_size_cap;
412 resp.vendor_id = attr.vendor_id;
413 resp.vendor_part_id = attr.vendor_part_id;
414 resp.hw_ver = attr.hw_ver;
415 resp.max_qp = attr.max_qp;
416 resp.max_qp_wr = attr.max_qp_wr;
417 resp.device_cap_flags = attr.device_cap_flags;
418 resp.max_sge = attr.max_sge;
419 resp.max_sge_rd = attr.max_sge_rd;
420 resp.max_cq = attr.max_cq;
421 resp.max_cqe = attr.max_cqe;
422 resp.max_mr = attr.max_mr;
423 resp.max_pd = attr.max_pd;
424 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
425 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
426 resp.max_res_rd_atom = attr.max_res_rd_atom;
427 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
428 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
429 resp.atomic_cap = attr.atomic_cap;
430 resp.max_ee = attr.max_ee;
431 resp.max_rdd = attr.max_rdd;
432 resp.max_mw = attr.max_mw;
433 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
434 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
435 resp.max_mcast_grp = attr.max_mcast_grp;
436 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
437 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
438 resp.max_ah = attr.max_ah;
439 resp.max_fmr = attr.max_fmr;
440 resp.max_map_per_fmr = attr.max_map_per_fmr;
441 resp.max_srq = attr.max_srq;
442 resp.max_srq_wr = attr.max_srq_wr;
443 resp.max_srq_sge = attr.max_srq_sge;
444 resp.max_pkeys = attr.max_pkeys;
445 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
446 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
447
448 if (copy_to_user((void __user *) (unsigned long) cmd.response,
449 &resp, sizeof resp))
450 return -EFAULT;
451
452 return in_len;
453 }
454
455 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
456 const char __user *buf,
457 int in_len, int out_len)
458 {
459 struct ib_uverbs_query_port cmd;
460 struct ib_uverbs_query_port_resp resp;
461 struct ib_port_attr attr;
462 int ret;
463
464 if (out_len < sizeof resp)
465 return -ENOSPC;
466
467 if (copy_from_user(&cmd, buf, sizeof cmd))
468 return -EFAULT;
469
470 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
471 if (ret)
472 return ret;
473
474 memset(&resp, 0, sizeof resp);
475
476 resp.state = attr.state;
477 resp.max_mtu = attr.max_mtu;
478 resp.active_mtu = attr.active_mtu;
479 resp.gid_tbl_len = attr.gid_tbl_len;
480 resp.port_cap_flags = attr.port_cap_flags;
481 resp.max_msg_sz = attr.max_msg_sz;
482 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
483 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
484 resp.pkey_tbl_len = attr.pkey_tbl_len;
485 resp.lid = attr.lid;
486 resp.sm_lid = attr.sm_lid;
487 resp.lmc = attr.lmc;
488 resp.max_vl_num = attr.max_vl_num;
489 resp.sm_sl = attr.sm_sl;
490 resp.subnet_timeout = attr.subnet_timeout;
491 resp.init_type_reply = attr.init_type_reply;
492 resp.active_width = attr.active_width;
493 resp.active_speed = attr.active_speed;
494 resp.phys_state = attr.phys_state;
495 resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev,
496 cmd.port_num);
497
498 if (copy_to_user((void __user *) (unsigned long) cmd.response,
499 &resp, sizeof resp))
500 return -EFAULT;
501
502 return in_len;
503 }
504
505 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
506 const char __user *buf,
507 int in_len, int out_len)
508 {
509 struct ib_uverbs_alloc_pd cmd;
510 struct ib_uverbs_alloc_pd_resp resp;
511 struct ib_udata udata;
512 struct ib_uobject *uobj;
513 struct ib_pd *pd;
514 int ret;
515
516 if (out_len < sizeof resp)
517 return -ENOSPC;
518
519 if (copy_from_user(&cmd, buf, sizeof cmd))
520 return -EFAULT;
521
522 INIT_UDATA(&udata, buf + sizeof cmd,
523 (unsigned long) cmd.response + sizeof resp,
524 in_len - sizeof cmd, out_len - sizeof resp);
525
526 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
527 if (!uobj)
528 return -ENOMEM;
529
530 init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
531 down_write(&uobj->mutex);
532
533 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
534 file->ucontext, &udata);
535 if (IS_ERR(pd)) {
536 ret = PTR_ERR(pd);
537 goto err;
538 }
539
540 pd->device = file->device->ib_dev;
541 pd->uobject = uobj;
542 atomic_set(&pd->usecnt, 0);
543
544 uobj->object = pd;
545 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
546 if (ret)
547 goto err_idr;
548
549 memset(&resp, 0, sizeof resp);
550 resp.pd_handle = uobj->id;
551
552 if (copy_to_user((void __user *) (unsigned long) cmd.response,
553 &resp, sizeof resp)) {
554 ret = -EFAULT;
555 goto err_copy;
556 }
557
558 mutex_lock(&file->mutex);
559 list_add_tail(&uobj->list, &file->ucontext->pd_list);
560 mutex_unlock(&file->mutex);
561
562 uobj->live = 1;
563
564 up_write(&uobj->mutex);
565
566 return in_len;
567
568 err_copy:
569 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
570
571 err_idr:
572 ib_dealloc_pd(pd);
573
574 err:
575 put_uobj_write(uobj);
576 return ret;
577 }
578
579 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
580 const char __user *buf,
581 int in_len, int out_len)
582 {
583 struct ib_uverbs_dealloc_pd cmd;
584 struct ib_uobject *uobj;
585 int ret;
586
587 if (copy_from_user(&cmd, buf, sizeof cmd))
588 return -EFAULT;
589
590 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
591 if (!uobj)
592 return -EINVAL;
593
594 ret = ib_dealloc_pd(uobj->object);
595 if (!ret)
596 uobj->live = 0;
597
598 put_uobj_write(uobj);
599
600 if (ret)
601 return ret;
602
603 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
604
605 mutex_lock(&file->mutex);
606 list_del(&uobj->list);
607 mutex_unlock(&file->mutex);
608
609 put_uobj(uobj);
610
611 return in_len;
612 }
613
614 struct xrcd_table_entry {
615 struct rb_node node;
616 struct ib_xrcd *xrcd;
617 struct inode *inode;
618 };
619
620 static int xrcd_table_insert(struct ib_uverbs_device *dev,
621 struct inode *inode,
622 struct ib_xrcd *xrcd)
623 {
624 struct xrcd_table_entry *entry, *scan;
625 struct rb_node **p = &dev->xrcd_tree.rb_node;
626 struct rb_node *parent = NULL;
627
628 entry = kmalloc(sizeof *entry, GFP_KERNEL);
629 if (!entry)
630 return -ENOMEM;
631
632 entry->xrcd = xrcd;
633 entry->inode = inode;
634
635 while (*p) {
636 parent = *p;
637 scan = rb_entry(parent, struct xrcd_table_entry, node);
638
639 if (inode < scan->inode) {
640 p = &(*p)->rb_left;
641 } else if (inode > scan->inode) {
642 p = &(*p)->rb_right;
643 } else {
644 kfree(entry);
645 return -EEXIST;
646 }
647 }
648
649 rb_link_node(&entry->node, parent, p);
650 rb_insert_color(&entry->node, &dev->xrcd_tree);
651 igrab(inode);
652 return 0;
653 }
654
655 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
656 struct inode *inode)
657 {
658 struct xrcd_table_entry *entry;
659 struct rb_node *p = dev->xrcd_tree.rb_node;
660
661 while (p) {
662 entry = rb_entry(p, struct xrcd_table_entry, node);
663
664 if (inode < entry->inode)
665 p = p->rb_left;
666 else if (inode > entry->inode)
667 p = p->rb_right;
668 else
669 return entry;
670 }
671
672 return NULL;
673 }
674
675 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
676 {
677 struct xrcd_table_entry *entry;
678
679 entry = xrcd_table_search(dev, inode);
680 if (!entry)
681 return NULL;
682
683 return entry->xrcd;
684 }
685
686 static void xrcd_table_delete(struct ib_uverbs_device *dev,
687 struct inode *inode)
688 {
689 struct xrcd_table_entry *entry;
690
691 entry = xrcd_table_search(dev, inode);
692 if (entry) {
693 iput(inode);
694 rb_erase(&entry->node, &dev->xrcd_tree);
695 kfree(entry);
696 }
697 }
698
699 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
700 const char __user *buf, int in_len,
701 int out_len)
702 {
703 struct ib_uverbs_open_xrcd cmd;
704 struct ib_uverbs_open_xrcd_resp resp;
705 struct ib_udata udata;
706 struct ib_uxrcd_object *obj;
707 struct ib_xrcd *xrcd = NULL;
708 struct fd f = {NULL, 0};
709 struct inode *inode = NULL;
710 int ret = 0;
711 int new_xrcd = 0;
712
713 if (out_len < sizeof resp)
714 return -ENOSPC;
715
716 if (copy_from_user(&cmd, buf, sizeof cmd))
717 return -EFAULT;
718
719 INIT_UDATA(&udata, buf + sizeof cmd,
720 (unsigned long) cmd.response + sizeof resp,
721 in_len - sizeof cmd, out_len - sizeof resp);
722
723 mutex_lock(&file->device->xrcd_tree_mutex);
724
725 if (cmd.fd != -1) {
726 /* search for file descriptor */
727 f = fdget(cmd.fd);
728 if (!f.file) {
729 ret = -EBADF;
730 goto err_tree_mutex_unlock;
731 }
732
733 inode = f.file->f_path.dentry->d_inode;
734 xrcd = find_xrcd(file->device, inode);
735 if (!xrcd && !(cmd.oflags & O_CREAT)) {
736 /* no file descriptor. Need CREATE flag */
737 ret = -EAGAIN;
738 goto err_tree_mutex_unlock;
739 }
740
741 if (xrcd && cmd.oflags & O_EXCL) {
742 ret = -EINVAL;
743 goto err_tree_mutex_unlock;
744 }
745 }
746
747 obj = kmalloc(sizeof *obj, GFP_KERNEL);
748 if (!obj) {
749 ret = -ENOMEM;
750 goto err_tree_mutex_unlock;
751 }
752
753 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
754
755 down_write(&obj->uobject.mutex);
756
757 if (!xrcd) {
758 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
759 file->ucontext, &udata);
760 if (IS_ERR(xrcd)) {
761 ret = PTR_ERR(xrcd);
762 goto err;
763 }
764
765 xrcd->inode = inode;
766 xrcd->device = file->device->ib_dev;
767 atomic_set(&xrcd->usecnt, 0);
768 mutex_init(&xrcd->tgt_qp_mutex);
769 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
770 new_xrcd = 1;
771 }
772
773 atomic_set(&obj->refcnt, 0);
774 obj->uobject.object = xrcd;
775 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
776 if (ret)
777 goto err_idr;
778
779 memset(&resp, 0, sizeof resp);
780 resp.xrcd_handle = obj->uobject.id;
781
782 if (inode) {
783 if (new_xrcd) {
784 /* create new inode/xrcd table entry */
785 ret = xrcd_table_insert(file->device, inode, xrcd);
786 if (ret)
787 goto err_insert_xrcd;
788 }
789 atomic_inc(&xrcd->usecnt);
790 }
791
792 if (copy_to_user((void __user *) (unsigned long) cmd.response,
793 &resp, sizeof resp)) {
794 ret = -EFAULT;
795 goto err_copy;
796 }
797
798 if (f.file)
799 fdput(f);
800
801 mutex_lock(&file->mutex);
802 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
803 mutex_unlock(&file->mutex);
804
805 obj->uobject.live = 1;
806 up_write(&obj->uobject.mutex);
807
808 mutex_unlock(&file->device->xrcd_tree_mutex);
809 return in_len;
810
811 err_copy:
812 if (inode) {
813 if (new_xrcd)
814 xrcd_table_delete(file->device, inode);
815 atomic_dec(&xrcd->usecnt);
816 }
817
818 err_insert_xrcd:
819 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
820
821 err_idr:
822 ib_dealloc_xrcd(xrcd);
823
824 err:
825 put_uobj_write(&obj->uobject);
826
827 err_tree_mutex_unlock:
828 if (f.file)
829 fdput(f);
830
831 mutex_unlock(&file->device->xrcd_tree_mutex);
832
833 return ret;
834 }
835
836 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
837 const char __user *buf, int in_len,
838 int out_len)
839 {
840 struct ib_uverbs_close_xrcd cmd;
841 struct ib_uobject *uobj;
842 struct ib_xrcd *xrcd = NULL;
843 struct inode *inode = NULL;
844 struct ib_uxrcd_object *obj;
845 int live;
846 int ret = 0;
847
848 if (copy_from_user(&cmd, buf, sizeof cmd))
849 return -EFAULT;
850
851 mutex_lock(&file->device->xrcd_tree_mutex);
852 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
853 if (!uobj) {
854 ret = -EINVAL;
855 goto out;
856 }
857
858 xrcd = uobj->object;
859 inode = xrcd->inode;
860 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
861 if (atomic_read(&obj->refcnt)) {
862 put_uobj_write(uobj);
863 ret = -EBUSY;
864 goto out;
865 }
866
867 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
868 ret = ib_dealloc_xrcd(uobj->object);
869 if (!ret)
870 uobj->live = 0;
871 }
872
873 live = uobj->live;
874 if (inode && ret)
875 atomic_inc(&xrcd->usecnt);
876
877 put_uobj_write(uobj);
878
879 if (ret)
880 goto out;
881
882 if (inode && !live)
883 xrcd_table_delete(file->device, inode);
884
885 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
886 mutex_lock(&file->mutex);
887 list_del(&uobj->list);
888 mutex_unlock(&file->mutex);
889
890 put_uobj(uobj);
891 ret = in_len;
892
893 out:
894 mutex_unlock(&file->device->xrcd_tree_mutex);
895 return ret;
896 }
897
898 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
899 struct ib_xrcd *xrcd)
900 {
901 struct inode *inode;
902
903 inode = xrcd->inode;
904 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
905 return;
906
907 ib_dealloc_xrcd(xrcd);
908
909 if (inode)
910 xrcd_table_delete(dev, inode);
911 }
912
913 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
914 const char __user *buf, int in_len,
915 int out_len)
916 {
917 struct ib_uverbs_reg_mr cmd;
918 struct ib_uverbs_reg_mr_resp resp;
919 struct ib_udata udata;
920 struct ib_uobject *uobj;
921 struct ib_pd *pd;
922 struct ib_mr *mr;
923 int ret;
924
925 if (out_len < sizeof resp)
926 return -ENOSPC;
927
928 if (copy_from_user(&cmd, buf, sizeof cmd))
929 return -EFAULT;
930
931 INIT_UDATA(&udata, buf + sizeof cmd,
932 (unsigned long) cmd.response + sizeof resp,
933 in_len - sizeof cmd, out_len - sizeof resp);
934
935 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
936 return -EINVAL;
937
938 /*
939 * Local write permission is required if remote write or
940 * remote atomic permission is also requested.
941 */
942 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
943 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
944 return -EINVAL;
945
946 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
947 if (!uobj)
948 return -ENOMEM;
949
950 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
951 down_write(&uobj->mutex);
952
953 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
954 if (!pd) {
955 ret = -EINVAL;
956 goto err_free;
957 }
958
959 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
960 cmd.access_flags, &udata);
961 if (IS_ERR(mr)) {
962 ret = PTR_ERR(mr);
963 goto err_put;
964 }
965
966 mr->device = pd->device;
967 mr->pd = pd;
968 mr->uobject = uobj;
969 atomic_inc(&pd->usecnt);
970 atomic_set(&mr->usecnt, 0);
971
972 uobj->object = mr;
973 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
974 if (ret)
975 goto err_unreg;
976
977 memset(&resp, 0, sizeof resp);
978 resp.lkey = mr->lkey;
979 resp.rkey = mr->rkey;
980 resp.mr_handle = uobj->id;
981
982 if (copy_to_user((void __user *) (unsigned long) cmd.response,
983 &resp, sizeof resp)) {
984 ret = -EFAULT;
985 goto err_copy;
986 }
987
988 put_pd_read(pd);
989
990 mutex_lock(&file->mutex);
991 list_add_tail(&uobj->list, &file->ucontext->mr_list);
992 mutex_unlock(&file->mutex);
993
994 uobj->live = 1;
995
996 up_write(&uobj->mutex);
997
998 return in_len;
999
1000 err_copy:
1001 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1002
1003 err_unreg:
1004 ib_dereg_mr(mr);
1005
1006 err_put:
1007 put_pd_read(pd);
1008
1009 err_free:
1010 put_uobj_write(uobj);
1011 return ret;
1012 }
1013
1014 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1015 const char __user *buf, int in_len,
1016 int out_len)
1017 {
1018 struct ib_uverbs_dereg_mr cmd;
1019 struct ib_mr *mr;
1020 struct ib_uobject *uobj;
1021 int ret = -EINVAL;
1022
1023 if (copy_from_user(&cmd, buf, sizeof cmd))
1024 return -EFAULT;
1025
1026 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1027 if (!uobj)
1028 return -EINVAL;
1029
1030 mr = uobj->object;
1031
1032 ret = ib_dereg_mr(mr);
1033 if (!ret)
1034 uobj->live = 0;
1035
1036 put_uobj_write(uobj);
1037
1038 if (ret)
1039 return ret;
1040
1041 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1042
1043 mutex_lock(&file->mutex);
1044 list_del(&uobj->list);
1045 mutex_unlock(&file->mutex);
1046
1047 put_uobj(uobj);
1048
1049 return in_len;
1050 }
1051
1052 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1053 const char __user *buf, int in_len,
1054 int out_len)
1055 {
1056 struct ib_uverbs_create_comp_channel cmd;
1057 struct ib_uverbs_create_comp_channel_resp resp;
1058 struct file *filp;
1059 int ret;
1060
1061 if (out_len < sizeof resp)
1062 return -ENOSPC;
1063
1064 if (copy_from_user(&cmd, buf, sizeof cmd))
1065 return -EFAULT;
1066
1067 ret = get_unused_fd();
1068 if (ret < 0)
1069 return ret;
1070 resp.fd = ret;
1071
1072 filp = ib_uverbs_alloc_event_file(file, 0);
1073 if (IS_ERR(filp)) {
1074 put_unused_fd(resp.fd);
1075 return PTR_ERR(filp);
1076 }
1077
1078 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1079 &resp, sizeof resp)) {
1080 put_unused_fd(resp.fd);
1081 fput(filp);
1082 return -EFAULT;
1083 }
1084
1085 fd_install(resp.fd, filp);
1086 return in_len;
1087 }
1088
1089 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1090 const char __user *buf, int in_len,
1091 int out_len)
1092 {
1093 struct ib_uverbs_create_cq cmd;
1094 struct ib_uverbs_create_cq_resp resp;
1095 struct ib_udata udata;
1096 struct ib_ucq_object *obj;
1097 struct ib_uverbs_event_file *ev_file = NULL;
1098 struct ib_cq *cq;
1099 int ret;
1100
1101 if (out_len < sizeof resp)
1102 return -ENOSPC;
1103
1104 if (copy_from_user(&cmd, buf, sizeof cmd))
1105 return -EFAULT;
1106
1107 INIT_UDATA(&udata, buf + sizeof cmd,
1108 (unsigned long) cmd.response + sizeof resp,
1109 in_len - sizeof cmd, out_len - sizeof resp);
1110
1111 if (cmd.comp_vector >= file->device->num_comp_vectors)
1112 return -EINVAL;
1113
1114 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1115 if (!obj)
1116 return -ENOMEM;
1117
1118 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class);
1119 down_write(&obj->uobject.mutex);
1120
1121 if (cmd.comp_channel >= 0) {
1122 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
1123 if (!ev_file) {
1124 ret = -EINVAL;
1125 goto err;
1126 }
1127 }
1128
1129 obj->uverbs_file = file;
1130 obj->comp_events_reported = 0;
1131 obj->async_events_reported = 0;
1132 INIT_LIST_HEAD(&obj->comp_list);
1133 INIT_LIST_HEAD(&obj->async_list);
1134
1135 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
1136 cmd.comp_vector,
1137 file->ucontext, &udata);
1138 if (IS_ERR(cq)) {
1139 ret = PTR_ERR(cq);
1140 goto err_file;
1141 }
1142
1143 cq->device = file->device->ib_dev;
1144 cq->uobject = &obj->uobject;
1145 cq->comp_handler = ib_uverbs_comp_handler;
1146 cq->event_handler = ib_uverbs_cq_event_handler;
1147 cq->cq_context = ev_file;
1148 atomic_set(&cq->usecnt, 0);
1149
1150 obj->uobject.object = cq;
1151 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1152 if (ret)
1153 goto err_free;
1154
1155 memset(&resp, 0, sizeof resp);
1156 resp.cq_handle = obj->uobject.id;
1157 resp.cqe = cq->cqe;
1158
1159 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1160 &resp, sizeof resp)) {
1161 ret = -EFAULT;
1162 goto err_copy;
1163 }
1164
1165 mutex_lock(&file->mutex);
1166 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1167 mutex_unlock(&file->mutex);
1168
1169 obj->uobject.live = 1;
1170
1171 up_write(&obj->uobject.mutex);
1172
1173 return in_len;
1174
1175 err_copy:
1176 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1177
1178 err_free:
1179 ib_destroy_cq(cq);
1180
1181 err_file:
1182 if (ev_file)
1183 ib_uverbs_release_ucq(file, ev_file, obj);
1184
1185 err:
1186 put_uobj_write(&obj->uobject);
1187 return ret;
1188 }
1189
1190 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1191 const char __user *buf, int in_len,
1192 int out_len)
1193 {
1194 struct ib_uverbs_resize_cq cmd;
1195 struct ib_uverbs_resize_cq_resp resp;
1196 struct ib_udata udata;
1197 struct ib_cq *cq;
1198 int ret = -EINVAL;
1199
1200 if (copy_from_user(&cmd, buf, sizeof cmd))
1201 return -EFAULT;
1202
1203 INIT_UDATA(&udata, buf + sizeof cmd,
1204 (unsigned long) cmd.response + sizeof resp,
1205 in_len - sizeof cmd, out_len - sizeof resp);
1206
1207 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1208 if (!cq)
1209 return -EINVAL;
1210
1211 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1212 if (ret)
1213 goto out;
1214
1215 resp.cqe = cq->cqe;
1216
1217 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1218 &resp, sizeof resp.cqe))
1219 ret = -EFAULT;
1220
1221 out:
1222 put_cq_read(cq);
1223
1224 return ret ? ret : in_len;
1225 }
1226
1227 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1228 {
1229 struct ib_uverbs_wc tmp;
1230
1231 tmp.wr_id = wc->wr_id;
1232 tmp.status = wc->status;
1233 tmp.opcode = wc->opcode;
1234 tmp.vendor_err = wc->vendor_err;
1235 tmp.byte_len = wc->byte_len;
1236 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1237 tmp.qp_num = wc->qp->qp_num;
1238 tmp.src_qp = wc->src_qp;
1239 tmp.wc_flags = wc->wc_flags;
1240 tmp.pkey_index = wc->pkey_index;
1241 tmp.slid = wc->slid;
1242 tmp.sl = wc->sl;
1243 tmp.dlid_path_bits = wc->dlid_path_bits;
1244 tmp.port_num = wc->port_num;
1245 tmp.reserved = 0;
1246
1247 if (copy_to_user(dest, &tmp, sizeof tmp))
1248 return -EFAULT;
1249
1250 return 0;
1251 }
1252
1253 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1254 const char __user *buf, int in_len,
1255 int out_len)
1256 {
1257 struct ib_uverbs_poll_cq cmd;
1258 struct ib_uverbs_poll_cq_resp resp;
1259 u8 __user *header_ptr;
1260 u8 __user *data_ptr;
1261 struct ib_cq *cq;
1262 struct ib_wc wc;
1263 int ret;
1264
1265 if (copy_from_user(&cmd, buf, sizeof cmd))
1266 return -EFAULT;
1267
1268 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1269 if (!cq)
1270 return -EINVAL;
1271
1272 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1273 header_ptr = (void __user *)(unsigned long) cmd.response;
1274 data_ptr = header_ptr + sizeof resp;
1275
1276 memset(&resp, 0, sizeof resp);
1277 while (resp.count < cmd.ne) {
1278 ret = ib_poll_cq(cq, 1, &wc);
1279 if (ret < 0)
1280 goto out_put;
1281 if (!ret)
1282 break;
1283
1284 ret = copy_wc_to_user(data_ptr, &wc);
1285 if (ret)
1286 goto out_put;
1287
1288 data_ptr += sizeof(struct ib_uverbs_wc);
1289 ++resp.count;
1290 }
1291
1292 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1293 ret = -EFAULT;
1294 goto out_put;
1295 }
1296
1297 ret = in_len;
1298
1299 out_put:
1300 put_cq_read(cq);
1301 return ret;
1302 }
1303
1304 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1305 const char __user *buf, int in_len,
1306 int out_len)
1307 {
1308 struct ib_uverbs_req_notify_cq cmd;
1309 struct ib_cq *cq;
1310
1311 if (copy_from_user(&cmd, buf, sizeof cmd))
1312 return -EFAULT;
1313
1314 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1315 if (!cq)
1316 return -EINVAL;
1317
1318 ib_req_notify_cq(cq, cmd.solicited_only ?
1319 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1320
1321 put_cq_read(cq);
1322
1323 return in_len;
1324 }
1325
1326 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1327 const char __user *buf, int in_len,
1328 int out_len)
1329 {
1330 struct ib_uverbs_destroy_cq cmd;
1331 struct ib_uverbs_destroy_cq_resp resp;
1332 struct ib_uobject *uobj;
1333 struct ib_cq *cq;
1334 struct ib_ucq_object *obj;
1335 struct ib_uverbs_event_file *ev_file;
1336 int ret = -EINVAL;
1337
1338 if (copy_from_user(&cmd, buf, sizeof cmd))
1339 return -EFAULT;
1340
1341 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1342 if (!uobj)
1343 return -EINVAL;
1344 cq = uobj->object;
1345 ev_file = cq->cq_context;
1346 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1347
1348 ret = ib_destroy_cq(cq);
1349 if (!ret)
1350 uobj->live = 0;
1351
1352 put_uobj_write(uobj);
1353
1354 if (ret)
1355 return ret;
1356
1357 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1358
1359 mutex_lock(&file->mutex);
1360 list_del(&uobj->list);
1361 mutex_unlock(&file->mutex);
1362
1363 ib_uverbs_release_ucq(file, ev_file, obj);
1364
1365 memset(&resp, 0, sizeof resp);
1366 resp.comp_events_reported = obj->comp_events_reported;
1367 resp.async_events_reported = obj->async_events_reported;
1368
1369 put_uobj(uobj);
1370
1371 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1372 &resp, sizeof resp))
1373 return -EFAULT;
1374
1375 return in_len;
1376 }
1377
1378 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1379 const char __user *buf, int in_len,
1380 int out_len)
1381 {
1382 struct ib_uverbs_create_qp cmd;
1383 struct ib_uverbs_create_qp_resp resp;
1384 struct ib_udata udata;
1385 struct ib_uqp_object *obj;
1386 struct ib_device *device;
1387 struct ib_pd *pd = NULL;
1388 struct ib_xrcd *xrcd = NULL;
1389 struct ib_uobject *uninitialized_var(xrcd_uobj);
1390 struct ib_cq *scq = NULL, *rcq = NULL;
1391 struct ib_srq *srq = NULL;
1392 struct ib_qp *qp;
1393 struct ib_qp_init_attr attr;
1394 int ret;
1395
1396 if (out_len < sizeof resp)
1397 return -ENOSPC;
1398
1399 if (copy_from_user(&cmd, buf, sizeof cmd))
1400 return -EFAULT;
1401
1402 if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1403 return -EPERM;
1404
1405 INIT_UDATA(&udata, buf + sizeof cmd,
1406 (unsigned long) cmd.response + sizeof resp,
1407 in_len - sizeof cmd, out_len - sizeof resp);
1408
1409 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1410 if (!obj)
1411 return -ENOMEM;
1412
1413 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1414 down_write(&obj->uevent.uobject.mutex);
1415
1416 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1417 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1418 if (!xrcd) {
1419 ret = -EINVAL;
1420 goto err_put;
1421 }
1422 device = xrcd->device;
1423 } else {
1424 if (cmd.qp_type == IB_QPT_XRC_INI) {
1425 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1426 } else {
1427 if (cmd.is_srq) {
1428 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1429 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1430 ret = -EINVAL;
1431 goto err_put;
1432 }
1433 }
1434
1435 if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1436 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1437 if (!rcq) {
1438 ret = -EINVAL;
1439 goto err_put;
1440 }
1441 }
1442 }
1443
1444 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1445 rcq = rcq ?: scq;
1446 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1447 if (!pd || !scq) {
1448 ret = -EINVAL;
1449 goto err_put;
1450 }
1451
1452 device = pd->device;
1453 }
1454
1455 attr.event_handler = ib_uverbs_qp_event_handler;
1456 attr.qp_context = file;
1457 attr.send_cq = scq;
1458 attr.recv_cq = rcq;
1459 attr.srq = srq;
1460 attr.xrcd = xrcd;
1461 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1462 attr.qp_type = cmd.qp_type;
1463 attr.create_flags = 0;
1464
1465 attr.cap.max_send_wr = cmd.max_send_wr;
1466 attr.cap.max_recv_wr = cmd.max_recv_wr;
1467 attr.cap.max_send_sge = cmd.max_send_sge;
1468 attr.cap.max_recv_sge = cmd.max_recv_sge;
1469 attr.cap.max_inline_data = cmd.max_inline_data;
1470
1471 obj->uevent.events_reported = 0;
1472 INIT_LIST_HEAD(&obj->uevent.event_list);
1473 INIT_LIST_HEAD(&obj->mcast_list);
1474
1475 if (cmd.qp_type == IB_QPT_XRC_TGT)
1476 qp = ib_create_qp(pd, &attr);
1477 else
1478 qp = device->create_qp(pd, &attr, &udata);
1479
1480 if (IS_ERR(qp)) {
1481 ret = PTR_ERR(qp);
1482 goto err_put;
1483 }
1484
1485 if (cmd.qp_type != IB_QPT_XRC_TGT) {
1486 qp->real_qp = qp;
1487 qp->device = device;
1488 qp->pd = pd;
1489 qp->send_cq = attr.send_cq;
1490 qp->recv_cq = attr.recv_cq;
1491 qp->srq = attr.srq;
1492 qp->event_handler = attr.event_handler;
1493 qp->qp_context = attr.qp_context;
1494 qp->qp_type = attr.qp_type;
1495 atomic_set(&qp->usecnt, 0);
1496 atomic_inc(&pd->usecnt);
1497 atomic_inc(&attr.send_cq->usecnt);
1498 if (attr.recv_cq)
1499 atomic_inc(&attr.recv_cq->usecnt);
1500 if (attr.srq)
1501 atomic_inc(&attr.srq->usecnt);
1502 }
1503 qp->uobject = &obj->uevent.uobject;
1504
1505 obj->uevent.uobject.object = qp;
1506 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1507 if (ret)
1508 goto err_destroy;
1509
1510 memset(&resp, 0, sizeof resp);
1511 resp.qpn = qp->qp_num;
1512 resp.qp_handle = obj->uevent.uobject.id;
1513 resp.max_recv_sge = attr.cap.max_recv_sge;
1514 resp.max_send_sge = attr.cap.max_send_sge;
1515 resp.max_recv_wr = attr.cap.max_recv_wr;
1516 resp.max_send_wr = attr.cap.max_send_wr;
1517 resp.max_inline_data = attr.cap.max_inline_data;
1518
1519 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1520 &resp, sizeof resp)) {
1521 ret = -EFAULT;
1522 goto err_copy;
1523 }
1524
1525 if (xrcd)
1526 put_xrcd_read(xrcd_uobj);
1527 if (pd)
1528 put_pd_read(pd);
1529 if (scq)
1530 put_cq_read(scq);
1531 if (rcq && rcq != scq)
1532 put_cq_read(rcq);
1533 if (srq)
1534 put_srq_read(srq);
1535
1536 mutex_lock(&file->mutex);
1537 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1538 mutex_unlock(&file->mutex);
1539
1540 obj->uevent.uobject.live = 1;
1541
1542 up_write(&obj->uevent.uobject.mutex);
1543
1544 return in_len;
1545
1546 err_copy:
1547 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1548
1549 err_destroy:
1550 ib_destroy_qp(qp);
1551
1552 err_put:
1553 if (xrcd)
1554 put_xrcd_read(xrcd_uobj);
1555 if (pd)
1556 put_pd_read(pd);
1557 if (scq)
1558 put_cq_read(scq);
1559 if (rcq && rcq != scq)
1560 put_cq_read(rcq);
1561 if (srq)
1562 put_srq_read(srq);
1563
1564 put_uobj_write(&obj->uevent.uobject);
1565 return ret;
1566 }
1567
1568 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1569 const char __user *buf, int in_len, int out_len)
1570 {
1571 struct ib_uverbs_open_qp cmd;
1572 struct ib_uverbs_create_qp_resp resp;
1573 struct ib_udata udata;
1574 struct ib_uqp_object *obj;
1575 struct ib_xrcd *xrcd;
1576 struct ib_uobject *uninitialized_var(xrcd_uobj);
1577 struct ib_qp *qp;
1578 struct ib_qp_open_attr attr;
1579 int ret;
1580
1581 if (out_len < sizeof resp)
1582 return -ENOSPC;
1583
1584 if (copy_from_user(&cmd, buf, sizeof cmd))
1585 return -EFAULT;
1586
1587 INIT_UDATA(&udata, buf + sizeof cmd,
1588 (unsigned long) cmd.response + sizeof resp,
1589 in_len - sizeof cmd, out_len - sizeof resp);
1590
1591 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1592 if (!obj)
1593 return -ENOMEM;
1594
1595 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1596 down_write(&obj->uevent.uobject.mutex);
1597
1598 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1599 if (!xrcd) {
1600 ret = -EINVAL;
1601 goto err_put;
1602 }
1603
1604 attr.event_handler = ib_uverbs_qp_event_handler;
1605 attr.qp_context = file;
1606 attr.qp_num = cmd.qpn;
1607 attr.qp_type = cmd.qp_type;
1608
1609 obj->uevent.events_reported = 0;
1610 INIT_LIST_HEAD(&obj->uevent.event_list);
1611 INIT_LIST_HEAD(&obj->mcast_list);
1612
1613 qp = ib_open_qp(xrcd, &attr);
1614 if (IS_ERR(qp)) {
1615 ret = PTR_ERR(qp);
1616 goto err_put;
1617 }
1618
1619 qp->uobject = &obj->uevent.uobject;
1620
1621 obj->uevent.uobject.object = qp;
1622 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1623 if (ret)
1624 goto err_destroy;
1625
1626 memset(&resp, 0, sizeof resp);
1627 resp.qpn = qp->qp_num;
1628 resp.qp_handle = obj->uevent.uobject.id;
1629
1630 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1631 &resp, sizeof resp)) {
1632 ret = -EFAULT;
1633 goto err_remove;
1634 }
1635
1636 put_xrcd_read(xrcd_uobj);
1637
1638 mutex_lock(&file->mutex);
1639 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1640 mutex_unlock(&file->mutex);
1641
1642 obj->uevent.uobject.live = 1;
1643
1644 up_write(&obj->uevent.uobject.mutex);
1645
1646 return in_len;
1647
1648 err_remove:
1649 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1650
1651 err_destroy:
1652 ib_destroy_qp(qp);
1653
1654 err_put:
1655 put_xrcd_read(xrcd_uobj);
1656 put_uobj_write(&obj->uevent.uobject);
1657 return ret;
1658 }
1659
1660 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1661 const char __user *buf, int in_len,
1662 int out_len)
1663 {
1664 struct ib_uverbs_query_qp cmd;
1665 struct ib_uverbs_query_qp_resp resp;
1666 struct ib_qp *qp;
1667 struct ib_qp_attr *attr;
1668 struct ib_qp_init_attr *init_attr;
1669 int ret;
1670
1671 if (copy_from_user(&cmd, buf, sizeof cmd))
1672 return -EFAULT;
1673
1674 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1675 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1676 if (!attr || !init_attr) {
1677 ret = -ENOMEM;
1678 goto out;
1679 }
1680
1681 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1682 if (!qp) {
1683 ret = -EINVAL;
1684 goto out;
1685 }
1686
1687 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1688
1689 put_qp_read(qp);
1690
1691 if (ret)
1692 goto out;
1693
1694 memset(&resp, 0, sizeof resp);
1695
1696 resp.qp_state = attr->qp_state;
1697 resp.cur_qp_state = attr->cur_qp_state;
1698 resp.path_mtu = attr->path_mtu;
1699 resp.path_mig_state = attr->path_mig_state;
1700 resp.qkey = attr->qkey;
1701 resp.rq_psn = attr->rq_psn;
1702 resp.sq_psn = attr->sq_psn;
1703 resp.dest_qp_num = attr->dest_qp_num;
1704 resp.qp_access_flags = attr->qp_access_flags;
1705 resp.pkey_index = attr->pkey_index;
1706 resp.alt_pkey_index = attr->alt_pkey_index;
1707 resp.sq_draining = attr->sq_draining;
1708 resp.max_rd_atomic = attr->max_rd_atomic;
1709 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1710 resp.min_rnr_timer = attr->min_rnr_timer;
1711 resp.port_num = attr->port_num;
1712 resp.timeout = attr->timeout;
1713 resp.retry_cnt = attr->retry_cnt;
1714 resp.rnr_retry = attr->rnr_retry;
1715 resp.alt_port_num = attr->alt_port_num;
1716 resp.alt_timeout = attr->alt_timeout;
1717
1718 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1719 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1720 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1721 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1722 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1723 resp.dest.dlid = attr->ah_attr.dlid;
1724 resp.dest.sl = attr->ah_attr.sl;
1725 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1726 resp.dest.static_rate = attr->ah_attr.static_rate;
1727 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1728 resp.dest.port_num = attr->ah_attr.port_num;
1729
1730 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1731 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1732 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1733 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1734 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1735 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1736 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1737 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1738 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1739 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1740 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1741
1742 resp.max_send_wr = init_attr->cap.max_send_wr;
1743 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1744 resp.max_send_sge = init_attr->cap.max_send_sge;
1745 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1746 resp.max_inline_data = init_attr->cap.max_inline_data;
1747 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1748
1749 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1750 &resp, sizeof resp))
1751 ret = -EFAULT;
1752
1753 out:
1754 kfree(attr);
1755 kfree(init_attr);
1756
1757 return ret ? ret : in_len;
1758 }
1759
1760 /* Remove ignored fields set in the attribute mask */
1761 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1762 {
1763 switch (qp_type) {
1764 case IB_QPT_XRC_INI:
1765 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1766 case IB_QPT_XRC_TGT:
1767 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1768 IB_QP_RNR_RETRY);
1769 default:
1770 return mask;
1771 }
1772 }
1773
1774 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1775 const char __user *buf, int in_len,
1776 int out_len)
1777 {
1778 struct ib_uverbs_modify_qp cmd;
1779 struct ib_udata udata;
1780 struct ib_qp *qp;
1781 struct ib_qp_attr *attr;
1782 int ret;
1783
1784 if (copy_from_user(&cmd, buf, sizeof cmd))
1785 return -EFAULT;
1786
1787 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1788 out_len);
1789
1790 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1791 if (!attr)
1792 return -ENOMEM;
1793
1794 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1795 if (!qp) {
1796 ret = -EINVAL;
1797 goto out;
1798 }
1799
1800 attr->qp_state = cmd.qp_state;
1801 attr->cur_qp_state = cmd.cur_qp_state;
1802 attr->path_mtu = cmd.path_mtu;
1803 attr->path_mig_state = cmd.path_mig_state;
1804 attr->qkey = cmd.qkey;
1805 attr->rq_psn = cmd.rq_psn;
1806 attr->sq_psn = cmd.sq_psn;
1807 attr->dest_qp_num = cmd.dest_qp_num;
1808 attr->qp_access_flags = cmd.qp_access_flags;
1809 attr->pkey_index = cmd.pkey_index;
1810 attr->alt_pkey_index = cmd.alt_pkey_index;
1811 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1812 attr->max_rd_atomic = cmd.max_rd_atomic;
1813 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1814 attr->min_rnr_timer = cmd.min_rnr_timer;
1815 attr->port_num = cmd.port_num;
1816 attr->timeout = cmd.timeout;
1817 attr->retry_cnt = cmd.retry_cnt;
1818 attr->rnr_retry = cmd.rnr_retry;
1819 attr->alt_port_num = cmd.alt_port_num;
1820 attr->alt_timeout = cmd.alt_timeout;
1821
1822 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1823 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1824 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1825 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1826 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1827 attr->ah_attr.dlid = cmd.dest.dlid;
1828 attr->ah_attr.sl = cmd.dest.sl;
1829 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1830 attr->ah_attr.static_rate = cmd.dest.static_rate;
1831 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1832 attr->ah_attr.port_num = cmd.dest.port_num;
1833
1834 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1835 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1836 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1837 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1838 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1839 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1840 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1841 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1842 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1843 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1844 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1845
1846 if (qp->real_qp == qp) {
1847 ret = qp->device->modify_qp(qp, attr,
1848 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
1849 } else {
1850 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
1851 }
1852
1853 put_qp_read(qp);
1854
1855 if (ret)
1856 goto out;
1857
1858 ret = in_len;
1859
1860 out:
1861 kfree(attr);
1862
1863 return ret;
1864 }
1865
1866 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1867 const char __user *buf, int in_len,
1868 int out_len)
1869 {
1870 struct ib_uverbs_destroy_qp cmd;
1871 struct ib_uverbs_destroy_qp_resp resp;
1872 struct ib_uobject *uobj;
1873 struct ib_qp *qp;
1874 struct ib_uqp_object *obj;
1875 int ret = -EINVAL;
1876
1877 if (copy_from_user(&cmd, buf, sizeof cmd))
1878 return -EFAULT;
1879
1880 memset(&resp, 0, sizeof resp);
1881
1882 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1883 if (!uobj)
1884 return -EINVAL;
1885 qp = uobj->object;
1886 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1887
1888 if (!list_empty(&obj->mcast_list)) {
1889 put_uobj_write(uobj);
1890 return -EBUSY;
1891 }
1892
1893 ret = ib_destroy_qp(qp);
1894 if (!ret)
1895 uobj->live = 0;
1896
1897 put_uobj_write(uobj);
1898
1899 if (ret)
1900 return ret;
1901
1902 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1903
1904 mutex_lock(&file->mutex);
1905 list_del(&uobj->list);
1906 mutex_unlock(&file->mutex);
1907
1908 ib_uverbs_release_uevent(file, &obj->uevent);
1909
1910 resp.events_reported = obj->uevent.events_reported;
1911
1912 put_uobj(uobj);
1913
1914 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1915 &resp, sizeof resp))
1916 return -EFAULT;
1917
1918 return in_len;
1919 }
1920
1921 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1922 const char __user *buf, int in_len,
1923 int out_len)
1924 {
1925 struct ib_uverbs_post_send cmd;
1926 struct ib_uverbs_post_send_resp resp;
1927 struct ib_uverbs_send_wr *user_wr;
1928 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1929 struct ib_qp *qp;
1930 int i, sg_ind;
1931 int is_ud;
1932 ssize_t ret = -EINVAL;
1933
1934 if (copy_from_user(&cmd, buf, sizeof cmd))
1935 return -EFAULT;
1936
1937 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1938 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1939 return -EINVAL;
1940
1941 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1942 return -EINVAL;
1943
1944 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1945 if (!user_wr)
1946 return -ENOMEM;
1947
1948 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1949 if (!qp)
1950 goto out;
1951
1952 is_ud = qp->qp_type == IB_QPT_UD;
1953 sg_ind = 0;
1954 last = NULL;
1955 for (i = 0; i < cmd.wr_count; ++i) {
1956 if (copy_from_user(user_wr,
1957 buf + sizeof cmd + i * cmd.wqe_size,
1958 cmd.wqe_size)) {
1959 ret = -EFAULT;
1960 goto out_put;
1961 }
1962
1963 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1964 ret = -EINVAL;
1965 goto out_put;
1966 }
1967
1968 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1969 user_wr->num_sge * sizeof (struct ib_sge),
1970 GFP_KERNEL);
1971 if (!next) {
1972 ret = -ENOMEM;
1973 goto out_put;
1974 }
1975
1976 if (!last)
1977 wr = next;
1978 else
1979 last->next = next;
1980 last = next;
1981
1982 next->next = NULL;
1983 next->wr_id = user_wr->wr_id;
1984 next->num_sge = user_wr->num_sge;
1985 next->opcode = user_wr->opcode;
1986 next->send_flags = user_wr->send_flags;
1987
1988 if (is_ud) {
1989 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1990 file->ucontext);
1991 if (!next->wr.ud.ah) {
1992 ret = -EINVAL;
1993 goto out_put;
1994 }
1995 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1996 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1997 } else {
1998 switch (next->opcode) {
1999 case IB_WR_RDMA_WRITE_WITH_IMM:
2000 next->ex.imm_data =
2001 (__be32 __force) user_wr->ex.imm_data;
2002 case IB_WR_RDMA_WRITE:
2003 case IB_WR_RDMA_READ:
2004 next->wr.rdma.remote_addr =
2005 user_wr->wr.rdma.remote_addr;
2006 next->wr.rdma.rkey =
2007 user_wr->wr.rdma.rkey;
2008 break;
2009 case IB_WR_SEND_WITH_IMM:
2010 next->ex.imm_data =
2011 (__be32 __force) user_wr->ex.imm_data;
2012 break;
2013 case IB_WR_SEND_WITH_INV:
2014 next->ex.invalidate_rkey =
2015 user_wr->ex.invalidate_rkey;
2016 break;
2017 case IB_WR_ATOMIC_CMP_AND_SWP:
2018 case IB_WR_ATOMIC_FETCH_AND_ADD:
2019 next->wr.atomic.remote_addr =
2020 user_wr->wr.atomic.remote_addr;
2021 next->wr.atomic.compare_add =
2022 user_wr->wr.atomic.compare_add;
2023 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2024 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2025 break;
2026 default:
2027 break;
2028 }
2029 }
2030
2031 if (next->num_sge) {
2032 next->sg_list = (void *) next +
2033 ALIGN(sizeof *next, sizeof (struct ib_sge));
2034 if (copy_from_user(next->sg_list,
2035 buf + sizeof cmd +
2036 cmd.wr_count * cmd.wqe_size +
2037 sg_ind * sizeof (struct ib_sge),
2038 next->num_sge * sizeof (struct ib_sge))) {
2039 ret = -EFAULT;
2040 goto out_put;
2041 }
2042 sg_ind += next->num_sge;
2043 } else
2044 next->sg_list = NULL;
2045 }
2046
2047 resp.bad_wr = 0;
2048 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2049 if (ret)
2050 for (next = wr; next; next = next->next) {
2051 ++resp.bad_wr;
2052 if (next == bad_wr)
2053 break;
2054 }
2055
2056 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2057 &resp, sizeof resp))
2058 ret = -EFAULT;
2059
2060 out_put:
2061 put_qp_read(qp);
2062
2063 while (wr) {
2064 if (is_ud && wr->wr.ud.ah)
2065 put_ah_read(wr->wr.ud.ah);
2066 next = wr->next;
2067 kfree(wr);
2068 wr = next;
2069 }
2070
2071 out:
2072 kfree(user_wr);
2073
2074 return ret ? ret : in_len;
2075 }
2076
2077 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2078 int in_len,
2079 u32 wr_count,
2080 u32 sge_count,
2081 u32 wqe_size)
2082 {
2083 struct ib_uverbs_recv_wr *user_wr;
2084 struct ib_recv_wr *wr = NULL, *last, *next;
2085 int sg_ind;
2086 int i;
2087 int ret;
2088
2089 if (in_len < wqe_size * wr_count +
2090 sge_count * sizeof (struct ib_uverbs_sge))
2091 return ERR_PTR(-EINVAL);
2092
2093 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2094 return ERR_PTR(-EINVAL);
2095
2096 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2097 if (!user_wr)
2098 return ERR_PTR(-ENOMEM);
2099
2100 sg_ind = 0;
2101 last = NULL;
2102 for (i = 0; i < wr_count; ++i) {
2103 if (copy_from_user(user_wr, buf + i * wqe_size,
2104 wqe_size)) {
2105 ret = -EFAULT;
2106 goto err;
2107 }
2108
2109 if (user_wr->num_sge + sg_ind > sge_count) {
2110 ret = -EINVAL;
2111 goto err;
2112 }
2113
2114 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2115 user_wr->num_sge * sizeof (struct ib_sge),
2116 GFP_KERNEL);
2117 if (!next) {
2118 ret = -ENOMEM;
2119 goto err;
2120 }
2121
2122 if (!last)
2123 wr = next;
2124 else
2125 last->next = next;
2126 last = next;
2127
2128 next->next = NULL;
2129 next->wr_id = user_wr->wr_id;
2130 next->num_sge = user_wr->num_sge;
2131
2132 if (next->num_sge) {
2133 next->sg_list = (void *) next +
2134 ALIGN(sizeof *next, sizeof (struct ib_sge));
2135 if (copy_from_user(next->sg_list,
2136 buf + wr_count * wqe_size +
2137 sg_ind * sizeof (struct ib_sge),
2138 next->num_sge * sizeof (struct ib_sge))) {
2139 ret = -EFAULT;
2140 goto err;
2141 }
2142 sg_ind += next->num_sge;
2143 } else
2144 next->sg_list = NULL;
2145 }
2146
2147 kfree(user_wr);
2148 return wr;
2149
2150 err:
2151 kfree(user_wr);
2152
2153 while (wr) {
2154 next = wr->next;
2155 kfree(wr);
2156 wr = next;
2157 }
2158
2159 return ERR_PTR(ret);
2160 }
2161
2162 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2163 const char __user *buf, int in_len,
2164 int out_len)
2165 {
2166 struct ib_uverbs_post_recv cmd;
2167 struct ib_uverbs_post_recv_resp resp;
2168 struct ib_recv_wr *wr, *next, *bad_wr;
2169 struct ib_qp *qp;
2170 ssize_t ret = -EINVAL;
2171
2172 if (copy_from_user(&cmd, buf, sizeof cmd))
2173 return -EFAULT;
2174
2175 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2176 in_len - sizeof cmd, cmd.wr_count,
2177 cmd.sge_count, cmd.wqe_size);
2178 if (IS_ERR(wr))
2179 return PTR_ERR(wr);
2180
2181 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2182 if (!qp)
2183 goto out;
2184
2185 resp.bad_wr = 0;
2186 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2187
2188 put_qp_read(qp);
2189
2190 if (ret)
2191 for (next = wr; next; next = next->next) {
2192 ++resp.bad_wr;
2193 if (next == bad_wr)
2194 break;
2195 }
2196
2197 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2198 &resp, sizeof resp))
2199 ret = -EFAULT;
2200
2201 out:
2202 while (wr) {
2203 next = wr->next;
2204 kfree(wr);
2205 wr = next;
2206 }
2207
2208 return ret ? ret : in_len;
2209 }
2210
2211 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2212 const char __user *buf, int in_len,
2213 int out_len)
2214 {
2215 struct ib_uverbs_post_srq_recv cmd;
2216 struct ib_uverbs_post_srq_recv_resp resp;
2217 struct ib_recv_wr *wr, *next, *bad_wr;
2218 struct ib_srq *srq;
2219 ssize_t ret = -EINVAL;
2220
2221 if (copy_from_user(&cmd, buf, sizeof cmd))
2222 return -EFAULT;
2223
2224 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2225 in_len - sizeof cmd, cmd.wr_count,
2226 cmd.sge_count, cmd.wqe_size);
2227 if (IS_ERR(wr))
2228 return PTR_ERR(wr);
2229
2230 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2231 if (!srq)
2232 goto out;
2233
2234 resp.bad_wr = 0;
2235 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2236
2237 put_srq_read(srq);
2238
2239 if (ret)
2240 for (next = wr; next; next = next->next) {
2241 ++resp.bad_wr;
2242 if (next == bad_wr)
2243 break;
2244 }
2245
2246 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2247 &resp, sizeof resp))
2248 ret = -EFAULT;
2249
2250 out:
2251 while (wr) {
2252 next = wr->next;
2253 kfree(wr);
2254 wr = next;
2255 }
2256
2257 return ret ? ret : in_len;
2258 }
2259
2260 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2261 const char __user *buf, int in_len,
2262 int out_len)
2263 {
2264 struct ib_uverbs_create_ah cmd;
2265 struct ib_uverbs_create_ah_resp resp;
2266 struct ib_uobject *uobj;
2267 struct ib_pd *pd;
2268 struct ib_ah *ah;
2269 struct ib_ah_attr attr;
2270 int ret;
2271
2272 if (out_len < sizeof resp)
2273 return -ENOSPC;
2274
2275 if (copy_from_user(&cmd, buf, sizeof cmd))
2276 return -EFAULT;
2277
2278 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2279 if (!uobj)
2280 return -ENOMEM;
2281
2282 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2283 down_write(&uobj->mutex);
2284
2285 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2286 if (!pd) {
2287 ret = -EINVAL;
2288 goto err;
2289 }
2290
2291 attr.dlid = cmd.attr.dlid;
2292 attr.sl = cmd.attr.sl;
2293 attr.src_path_bits = cmd.attr.src_path_bits;
2294 attr.static_rate = cmd.attr.static_rate;
2295 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2296 attr.port_num = cmd.attr.port_num;
2297 attr.grh.flow_label = cmd.attr.grh.flow_label;
2298 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2299 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2300 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2301 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2302
2303 ah = ib_create_ah(pd, &attr);
2304 if (IS_ERR(ah)) {
2305 ret = PTR_ERR(ah);
2306 goto err_put;
2307 }
2308
2309 ah->uobject = uobj;
2310 uobj->object = ah;
2311
2312 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2313 if (ret)
2314 goto err_destroy;
2315
2316 resp.ah_handle = uobj->id;
2317
2318 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2319 &resp, sizeof resp)) {
2320 ret = -EFAULT;
2321 goto err_copy;
2322 }
2323
2324 put_pd_read(pd);
2325
2326 mutex_lock(&file->mutex);
2327 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2328 mutex_unlock(&file->mutex);
2329
2330 uobj->live = 1;
2331
2332 up_write(&uobj->mutex);
2333
2334 return in_len;
2335
2336 err_copy:
2337 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2338
2339 err_destroy:
2340 ib_destroy_ah(ah);
2341
2342 err_put:
2343 put_pd_read(pd);
2344
2345 err:
2346 put_uobj_write(uobj);
2347 return ret;
2348 }
2349
2350 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2351 const char __user *buf, int in_len, int out_len)
2352 {
2353 struct ib_uverbs_destroy_ah cmd;
2354 struct ib_ah *ah;
2355 struct ib_uobject *uobj;
2356 int ret;
2357
2358 if (copy_from_user(&cmd, buf, sizeof cmd))
2359 return -EFAULT;
2360
2361 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2362 if (!uobj)
2363 return -EINVAL;
2364 ah = uobj->object;
2365
2366 ret = ib_destroy_ah(ah);
2367 if (!ret)
2368 uobj->live = 0;
2369
2370 put_uobj_write(uobj);
2371
2372 if (ret)
2373 return ret;
2374
2375 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2376
2377 mutex_lock(&file->mutex);
2378 list_del(&uobj->list);
2379 mutex_unlock(&file->mutex);
2380
2381 put_uobj(uobj);
2382
2383 return in_len;
2384 }
2385
2386 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2387 const char __user *buf, int in_len,
2388 int out_len)
2389 {
2390 struct ib_uverbs_attach_mcast cmd;
2391 struct ib_qp *qp;
2392 struct ib_uqp_object *obj;
2393 struct ib_uverbs_mcast_entry *mcast;
2394 int ret;
2395
2396 if (copy_from_user(&cmd, buf, sizeof cmd))
2397 return -EFAULT;
2398
2399 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2400 if (!qp)
2401 return -EINVAL;
2402
2403 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2404
2405 list_for_each_entry(mcast, &obj->mcast_list, list)
2406 if (cmd.mlid == mcast->lid &&
2407 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2408 ret = 0;
2409 goto out_put;
2410 }
2411
2412 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2413 if (!mcast) {
2414 ret = -ENOMEM;
2415 goto out_put;
2416 }
2417
2418 mcast->lid = cmd.mlid;
2419 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2420
2421 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2422 if (!ret)
2423 list_add_tail(&mcast->list, &obj->mcast_list);
2424 else
2425 kfree(mcast);
2426
2427 out_put:
2428 put_qp_write(qp);
2429
2430 return ret ? ret : in_len;
2431 }
2432
2433 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2434 const char __user *buf, int in_len,
2435 int out_len)
2436 {
2437 struct ib_uverbs_detach_mcast cmd;
2438 struct ib_uqp_object *obj;
2439 struct ib_qp *qp;
2440 struct ib_uverbs_mcast_entry *mcast;
2441 int ret = -EINVAL;
2442
2443 if (copy_from_user(&cmd, buf, sizeof cmd))
2444 return -EFAULT;
2445
2446 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2447 if (!qp)
2448 return -EINVAL;
2449
2450 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2451 if (ret)
2452 goto out_put;
2453
2454 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2455
2456 list_for_each_entry(mcast, &obj->mcast_list, list)
2457 if (cmd.mlid == mcast->lid &&
2458 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2459 list_del(&mcast->list);
2460 kfree(mcast);
2461 break;
2462 }
2463
2464 out_put:
2465 put_qp_write(qp);
2466
2467 return ret ? ret : in_len;
2468 }
2469
2470 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
2471 struct ib_uverbs_create_xsrq *cmd,
2472 struct ib_udata *udata)
2473 {
2474 struct ib_uverbs_create_srq_resp resp;
2475 struct ib_usrq_object *obj;
2476 struct ib_pd *pd;
2477 struct ib_srq *srq;
2478 struct ib_uobject *uninitialized_var(xrcd_uobj);
2479 struct ib_srq_init_attr attr;
2480 int ret;
2481
2482 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2483 if (!obj)
2484 return -ENOMEM;
2485
2486 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
2487 down_write(&obj->uevent.uobject.mutex);
2488
2489 if (cmd->srq_type == IB_SRQT_XRC) {
2490 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
2491 if (!attr.ext.xrc.xrcd) {
2492 ret = -EINVAL;
2493 goto err;
2494 }
2495
2496 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2497 atomic_inc(&obj->uxrcd->refcnt);
2498
2499 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
2500 if (!attr.ext.xrc.cq) {
2501 ret = -EINVAL;
2502 goto err_put_xrcd;
2503 }
2504 }
2505
2506 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
2507 if (!pd) {
2508 ret = -EINVAL;
2509 goto err_put_cq;
2510 }
2511
2512 attr.event_handler = ib_uverbs_srq_event_handler;
2513 attr.srq_context = file;
2514 attr.srq_type = cmd->srq_type;
2515 attr.attr.max_wr = cmd->max_wr;
2516 attr.attr.max_sge = cmd->max_sge;
2517 attr.attr.srq_limit = cmd->srq_limit;
2518
2519 obj->uevent.events_reported = 0;
2520 INIT_LIST_HEAD(&obj->uevent.event_list);
2521
2522 srq = pd->device->create_srq(pd, &attr, udata);
2523 if (IS_ERR(srq)) {
2524 ret = PTR_ERR(srq);
2525 goto err_put;
2526 }
2527
2528 srq->device = pd->device;
2529 srq->pd = pd;
2530 srq->srq_type = cmd->srq_type;
2531 srq->uobject = &obj->uevent.uobject;
2532 srq->event_handler = attr.event_handler;
2533 srq->srq_context = attr.srq_context;
2534
2535 if (cmd->srq_type == IB_SRQT_XRC) {
2536 srq->ext.xrc.cq = attr.ext.xrc.cq;
2537 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
2538 atomic_inc(&attr.ext.xrc.cq->usecnt);
2539 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
2540 }
2541
2542 atomic_inc(&pd->usecnt);
2543 atomic_set(&srq->usecnt, 0);
2544
2545 obj->uevent.uobject.object = srq;
2546 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2547 if (ret)
2548 goto err_destroy;
2549
2550 memset(&resp, 0, sizeof resp);
2551 resp.srq_handle = obj->uevent.uobject.id;
2552 resp.max_wr = attr.attr.max_wr;
2553 resp.max_sge = attr.attr.max_sge;
2554 if (cmd->srq_type == IB_SRQT_XRC)
2555 resp.srqn = srq->ext.xrc.srq_num;
2556
2557 if (copy_to_user((void __user *) (unsigned long) cmd->response,
2558 &resp, sizeof resp)) {
2559 ret = -EFAULT;
2560 goto err_copy;
2561 }
2562
2563 if (cmd->srq_type == IB_SRQT_XRC) {
2564 put_uobj_read(xrcd_uobj);
2565 put_cq_read(attr.ext.xrc.cq);
2566 }
2567 put_pd_read(pd);
2568
2569 mutex_lock(&file->mutex);
2570 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
2571 mutex_unlock(&file->mutex);
2572
2573 obj->uevent.uobject.live = 1;
2574
2575 up_write(&obj->uevent.uobject.mutex);
2576
2577 return 0;
2578
2579 err_copy:
2580 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2581
2582 err_destroy:
2583 ib_destroy_srq(srq);
2584
2585 err_put:
2586 put_pd_read(pd);
2587
2588 err_put_cq:
2589 if (cmd->srq_type == IB_SRQT_XRC)
2590 put_cq_read(attr.ext.xrc.cq);
2591
2592 err_put_xrcd:
2593 if (cmd->srq_type == IB_SRQT_XRC) {
2594 atomic_dec(&obj->uxrcd->refcnt);
2595 put_uobj_read(xrcd_uobj);
2596 }
2597
2598 err:
2599 put_uobj_write(&obj->uevent.uobject);
2600 return ret;
2601 }
2602
2603 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
2604 const char __user *buf, int in_len,
2605 int out_len)
2606 {
2607 struct ib_uverbs_create_srq cmd;
2608 struct ib_uverbs_create_xsrq xcmd;
2609 struct ib_uverbs_create_srq_resp resp;
2610 struct ib_udata udata;
2611 int ret;
2612
2613 if (out_len < sizeof resp)
2614 return -ENOSPC;
2615
2616 if (copy_from_user(&cmd, buf, sizeof cmd))
2617 return -EFAULT;
2618
2619 xcmd.response = cmd.response;
2620 xcmd.user_handle = cmd.user_handle;
2621 xcmd.srq_type = IB_SRQT_BASIC;
2622 xcmd.pd_handle = cmd.pd_handle;
2623 xcmd.max_wr = cmd.max_wr;
2624 xcmd.max_sge = cmd.max_sge;
2625 xcmd.srq_limit = cmd.srq_limit;
2626
2627 INIT_UDATA(&udata, buf + sizeof cmd,
2628 (unsigned long) cmd.response + sizeof resp,
2629 in_len - sizeof cmd, out_len - sizeof resp);
2630
2631 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
2632 if (ret)
2633 return ret;
2634
2635 return in_len;
2636 }
2637
2638 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
2639 const char __user *buf, int in_len, int out_len)
2640 {
2641 struct ib_uverbs_create_xsrq cmd;
2642 struct ib_uverbs_create_srq_resp resp;
2643 struct ib_udata udata;
2644 int ret;
2645
2646 if (out_len < sizeof resp)
2647 return -ENOSPC;
2648
2649 if (copy_from_user(&cmd, buf, sizeof cmd))
2650 return -EFAULT;
2651
2652 INIT_UDATA(&udata, buf + sizeof cmd,
2653 (unsigned long) cmd.response + sizeof resp,
2654 in_len - sizeof cmd, out_len - sizeof resp);
2655
2656 ret = __uverbs_create_xsrq(file, &cmd, &udata);
2657 if (ret)
2658 return ret;
2659
2660 return in_len;
2661 }
2662
2663 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2664 const char __user *buf, int in_len,
2665 int out_len)
2666 {
2667 struct ib_uverbs_modify_srq cmd;
2668 struct ib_udata udata;
2669 struct ib_srq *srq;
2670 struct ib_srq_attr attr;
2671 int ret;
2672
2673 if (copy_from_user(&cmd, buf, sizeof cmd))
2674 return -EFAULT;
2675
2676 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2677 out_len);
2678
2679 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2680 if (!srq)
2681 return -EINVAL;
2682
2683 attr.max_wr = cmd.max_wr;
2684 attr.srq_limit = cmd.srq_limit;
2685
2686 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2687
2688 put_srq_read(srq);
2689
2690 return ret ? ret : in_len;
2691 }
2692
2693 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2694 const char __user *buf,
2695 int in_len, int out_len)
2696 {
2697 struct ib_uverbs_query_srq cmd;
2698 struct ib_uverbs_query_srq_resp resp;
2699 struct ib_srq_attr attr;
2700 struct ib_srq *srq;
2701 int ret;
2702
2703 if (out_len < sizeof resp)
2704 return -ENOSPC;
2705
2706 if (copy_from_user(&cmd, buf, sizeof cmd))
2707 return -EFAULT;
2708
2709 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2710 if (!srq)
2711 return -EINVAL;
2712
2713 ret = ib_query_srq(srq, &attr);
2714
2715 put_srq_read(srq);
2716
2717 if (ret)
2718 return ret;
2719
2720 memset(&resp, 0, sizeof resp);
2721
2722 resp.max_wr = attr.max_wr;
2723 resp.max_sge = attr.max_sge;
2724 resp.srq_limit = attr.srq_limit;
2725
2726 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2727 &resp, sizeof resp))
2728 return -EFAULT;
2729
2730 return in_len;
2731 }
2732
2733 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2734 const char __user *buf, int in_len,
2735 int out_len)
2736 {
2737 struct ib_uverbs_destroy_srq cmd;
2738 struct ib_uverbs_destroy_srq_resp resp;
2739 struct ib_uobject *uobj;
2740 struct ib_srq *srq;
2741 struct ib_uevent_object *obj;
2742 int ret = -EINVAL;
2743
2744 if (copy_from_user(&cmd, buf, sizeof cmd))
2745 return -EFAULT;
2746
2747 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2748 if (!uobj)
2749 return -EINVAL;
2750 srq = uobj->object;
2751 obj = container_of(uobj, struct ib_uevent_object, uobject);
2752
2753 ret = ib_destroy_srq(srq);
2754 if (!ret)
2755 uobj->live = 0;
2756
2757 put_uobj_write(uobj);
2758
2759 if (ret)
2760 return ret;
2761
2762 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2763
2764 mutex_lock(&file->mutex);
2765 list_del(&uobj->list);
2766 mutex_unlock(&file->mutex);
2767
2768 ib_uverbs_release_uevent(file, obj);
2769
2770 memset(&resp, 0, sizeof resp);
2771 resp.events_reported = obj->events_reported;
2772
2773 put_uobj(uobj);
2774
2775 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2776 &resp, sizeof resp))
2777 ret = -EFAULT;
2778
2779 return ret ? ret : in_len;
2780 }
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