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serial: xilinx_uartps: fix bad register write in console_write
[linux-2.6-xlnx.git] / drivers / infiniband / core / uverbs_cmd.c
blobf9d0d7c413a25b9e15775acf12ae20335140a2f7
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 file *f = NULL;
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 = fget(cmd.fd);
728 if (!f) {
729 ret = -EBADF;
730 goto err_tree_mutex_unlock;
731 }
732
733 inode = f->f_dentry->d_inode;
734 if (!inode) {
735 ret = -EBADF;
736 goto err_tree_mutex_unlock;
737 }
738
739 xrcd = find_xrcd(file->device, inode);
740 if (!xrcd && !(cmd.oflags & O_CREAT)) {
741 /* no file descriptor. Need CREATE flag */
742 ret = -EAGAIN;
743 goto err_tree_mutex_unlock;
744 }
745
746 if (xrcd && cmd.oflags & O_EXCL) {
747 ret = -EINVAL;
748 goto err_tree_mutex_unlock;
749 }
750 }
751
752 obj = kmalloc(sizeof *obj, GFP_KERNEL);
753 if (!obj) {
754 ret = -ENOMEM;
755 goto err_tree_mutex_unlock;
756 }
757
758 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
759
760 down_write(&obj->uobject.mutex);
761
762 if (!xrcd) {
763 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
764 file->ucontext, &udata);
765 if (IS_ERR(xrcd)) {
766 ret = PTR_ERR(xrcd);
767 goto err;
768 }
769
770 xrcd->inode = inode;
771 xrcd->device = file->device->ib_dev;
772 atomic_set(&xrcd->usecnt, 0);
773 mutex_init(&xrcd->tgt_qp_mutex);
774 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
775 new_xrcd = 1;
776 }
777
778 atomic_set(&obj->refcnt, 0);
779 obj->uobject.object = xrcd;
780 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
781 if (ret)
782 goto err_idr;
783
784 memset(&resp, 0, sizeof resp);
785 resp.xrcd_handle = obj->uobject.id;
786
787 if (inode) {
788 if (new_xrcd) {
789 /* create new inode/xrcd table entry */
790 ret = xrcd_table_insert(file->device, inode, xrcd);
791 if (ret)
792 goto err_insert_xrcd;
793 }
794 atomic_inc(&xrcd->usecnt);
795 }
796
797 if (copy_to_user((void __user *) (unsigned long) cmd.response,
798 &resp, sizeof resp)) {
799 ret = -EFAULT;
800 goto err_copy;
801 }
802
803 if (f)
804 fput(f);
805
806 mutex_lock(&file->mutex);
807 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
808 mutex_unlock(&file->mutex);
809
810 obj->uobject.live = 1;
811 up_write(&obj->uobject.mutex);
812
813 mutex_unlock(&file->device->xrcd_tree_mutex);
814 return in_len;
815
816 err_copy:
817 if (inode) {
818 if (new_xrcd)
819 xrcd_table_delete(file->device, inode);
820 atomic_dec(&xrcd->usecnt);
821 }
822
823 err_insert_xrcd:
824 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
825
826 err_idr:
827 ib_dealloc_xrcd(xrcd);
828
829 err:
830 put_uobj_write(&obj->uobject);
831
832 err_tree_mutex_unlock:
833 if (f)
834 fput(f);
835
836 mutex_unlock(&file->device->xrcd_tree_mutex);
837
838 return ret;
839 }
840
841 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
842 const char __user *buf, int in_len,
843 int out_len)
844 {
845 struct ib_uverbs_close_xrcd cmd;
846 struct ib_uobject *uobj;
847 struct ib_xrcd *xrcd = NULL;
848 struct inode *inode = NULL;
849 struct ib_uxrcd_object *obj;
850 int live;
851 int ret = 0;
852
853 if (copy_from_user(&cmd, buf, sizeof cmd))
854 return -EFAULT;
855
856 mutex_lock(&file->device->xrcd_tree_mutex);
857 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
858 if (!uobj) {
859 ret = -EINVAL;
860 goto out;
861 }
862
863 xrcd = uobj->object;
864 inode = xrcd->inode;
865 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
866 if (atomic_read(&obj->refcnt)) {
867 put_uobj_write(uobj);
868 ret = -EBUSY;
869 goto out;
870 }
871
872 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
873 ret = ib_dealloc_xrcd(uobj->object);
874 if (!ret)
875 uobj->live = 0;
876 }
877
878 live = uobj->live;
879 if (inode && ret)
880 atomic_inc(&xrcd->usecnt);
881
882 put_uobj_write(uobj);
883
884 if (ret)
885 goto out;
886
887 if (inode && !live)
888 xrcd_table_delete(file->device, inode);
889
890 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
891 mutex_lock(&file->mutex);
892 list_del(&uobj->list);
893 mutex_unlock(&file->mutex);
894
895 put_uobj(uobj);
896 ret = in_len;
897
898 out:
899 mutex_unlock(&file->device->xrcd_tree_mutex);
900 return ret;
901 }
902
903 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
904 struct ib_xrcd *xrcd)
905 {
906 struct inode *inode;
907
908 inode = xrcd->inode;
909 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
910 return;
911
912 ib_dealloc_xrcd(xrcd);
913
914 if (inode)
915 xrcd_table_delete(dev, inode);
916 }
917
918 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
919 const char __user *buf, int in_len,
920 int out_len)
921 {
922 struct ib_uverbs_reg_mr cmd;
923 struct ib_uverbs_reg_mr_resp resp;
924 struct ib_udata udata;
925 struct ib_uobject *uobj;
926 struct ib_pd *pd;
927 struct ib_mr *mr;
928 int ret;
929
930 if (out_len < sizeof resp)
931 return -ENOSPC;
932
933 if (copy_from_user(&cmd, buf, sizeof cmd))
934 return -EFAULT;
935
936 INIT_UDATA(&udata, buf + sizeof cmd,
937 (unsigned long) cmd.response + sizeof resp,
938 in_len - sizeof cmd, out_len - sizeof resp);
939
940 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
941 return -EINVAL;
942
943 /*
944 * Local write permission is required if remote write or
945 * remote atomic permission is also requested.
946 */
947 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
948 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
949 return -EINVAL;
950
951 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
952 if (!uobj)
953 return -ENOMEM;
954
955 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
956 down_write(&uobj->mutex);
957
958 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
959 if (!pd) {
960 ret = -EINVAL;
961 goto err_free;
962 }
963
964 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
965 cmd.access_flags, &udata);
966 if (IS_ERR(mr)) {
967 ret = PTR_ERR(mr);
968 goto err_put;
969 }
970
971 mr->device = pd->device;
972 mr->pd = pd;
973 mr->uobject = uobj;
974 atomic_inc(&pd->usecnt);
975 atomic_set(&mr->usecnt, 0);
976
977 uobj->object = mr;
978 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
979 if (ret)
980 goto err_unreg;
981
982 memset(&resp, 0, sizeof resp);
983 resp.lkey = mr->lkey;
984 resp.rkey = mr->rkey;
985 resp.mr_handle = uobj->id;
986
987 if (copy_to_user((void __user *) (unsigned long) cmd.response,
988 &resp, sizeof resp)) {
989 ret = -EFAULT;
990 goto err_copy;
991 }
992
993 put_pd_read(pd);
994
995 mutex_lock(&file->mutex);
996 list_add_tail(&uobj->list, &file->ucontext->mr_list);
997 mutex_unlock(&file->mutex);
998
999 uobj->live = 1;
1000
1001 up_write(&uobj->mutex);
1002
1003 return in_len;
1004
1005 err_copy:
1006 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1007
1008 err_unreg:
1009 ib_dereg_mr(mr);
1010
1011 err_put:
1012 put_pd_read(pd);
1013
1014 err_free:
1015 put_uobj_write(uobj);
1016 return ret;
1017 }
1018
1019 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1020 const char __user *buf, int in_len,
1021 int out_len)
1022 {
1023 struct ib_uverbs_dereg_mr cmd;
1024 struct ib_mr *mr;
1025 struct ib_uobject *uobj;
1026 int ret = -EINVAL;
1027
1028 if (copy_from_user(&cmd, buf, sizeof cmd))
1029 return -EFAULT;
1030
1031 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1032 if (!uobj)
1033 return -EINVAL;
1034
1035 mr = uobj->object;
1036
1037 ret = ib_dereg_mr(mr);
1038 if (!ret)
1039 uobj->live = 0;
1040
1041 put_uobj_write(uobj);
1042
1043 if (ret)
1044 return ret;
1045
1046 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1047
1048 mutex_lock(&file->mutex);
1049 list_del(&uobj->list);
1050 mutex_unlock(&file->mutex);
1051
1052 put_uobj(uobj);
1053
1054 return in_len;
1055 }
1056
1057 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1058 const char __user *buf, int in_len,
1059 int out_len)
1060 {
1061 struct ib_uverbs_create_comp_channel cmd;
1062 struct ib_uverbs_create_comp_channel_resp resp;
1063 struct file *filp;
1064 int ret;
1065
1066 if (out_len < sizeof resp)
1067 return -ENOSPC;
1068
1069 if (copy_from_user(&cmd, buf, sizeof cmd))
1070 return -EFAULT;
1071
1072 ret = get_unused_fd();
1073 if (ret < 0)
1074 return ret;
1075 resp.fd = ret;
1076
1077 filp = ib_uverbs_alloc_event_file(file, 0);
1078 if (IS_ERR(filp)) {
1079 put_unused_fd(resp.fd);
1080 return PTR_ERR(filp);
1081 }
1082
1083 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1084 &resp, sizeof resp)) {
1085 put_unused_fd(resp.fd);
1086 fput(filp);
1087 return -EFAULT;
1088 }
1089
1090 fd_install(resp.fd, filp);
1091 return in_len;
1092 }
1093
1094 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1095 const char __user *buf, int in_len,
1096 int out_len)
1097 {
1098 struct ib_uverbs_create_cq cmd;
1099 struct ib_uverbs_create_cq_resp resp;
1100 struct ib_udata udata;
1101 struct ib_ucq_object *obj;
1102 struct ib_uverbs_event_file *ev_file = NULL;
1103 struct ib_cq *cq;
1104 int ret;
1105
1106 if (out_len < sizeof resp)
1107 return -ENOSPC;
1108
1109 if (copy_from_user(&cmd, buf, sizeof cmd))
1110 return -EFAULT;
1111
1112 INIT_UDATA(&udata, buf + sizeof cmd,
1113 (unsigned long) cmd.response + sizeof resp,
1114 in_len - sizeof cmd, out_len - sizeof resp);
1115
1116 if (cmd.comp_vector >= file->device->num_comp_vectors)
1117 return -EINVAL;
1118
1119 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1120 if (!obj)
1121 return -ENOMEM;
1122
1123 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class);
1124 down_write(&obj->uobject.mutex);
1125
1126 if (cmd.comp_channel >= 0) {
1127 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
1128 if (!ev_file) {
1129 ret = -EINVAL;
1130 goto err;
1131 }
1132 }
1133
1134 obj->uverbs_file = file;
1135 obj->comp_events_reported = 0;
1136 obj->async_events_reported = 0;
1137 INIT_LIST_HEAD(&obj->comp_list);
1138 INIT_LIST_HEAD(&obj->async_list);
1139
1140 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
1141 cmd.comp_vector,
1142 file->ucontext, &udata);
1143 if (IS_ERR(cq)) {
1144 ret = PTR_ERR(cq);
1145 goto err_file;
1146 }
1147
1148 cq->device = file->device->ib_dev;
1149 cq->uobject = &obj->uobject;
1150 cq->comp_handler = ib_uverbs_comp_handler;
1151 cq->event_handler = ib_uverbs_cq_event_handler;
1152 cq->cq_context = ev_file;
1153 atomic_set(&cq->usecnt, 0);
1154
1155 obj->uobject.object = cq;
1156 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1157 if (ret)
1158 goto err_free;
1159
1160 memset(&resp, 0, sizeof resp);
1161 resp.cq_handle = obj->uobject.id;
1162 resp.cqe = cq->cqe;
1163
1164 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1165 &resp, sizeof resp)) {
1166 ret = -EFAULT;
1167 goto err_copy;
1168 }
1169
1170 mutex_lock(&file->mutex);
1171 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1172 mutex_unlock(&file->mutex);
1173
1174 obj->uobject.live = 1;
1175
1176 up_write(&obj->uobject.mutex);
1177
1178 return in_len;
1179
1180 err_copy:
1181 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1182
1183 err_free:
1184 ib_destroy_cq(cq);
1185
1186 err_file:
1187 if (ev_file)
1188 ib_uverbs_release_ucq(file, ev_file, obj);
1189
1190 err:
1191 put_uobj_write(&obj->uobject);
1192 return ret;
1193 }
1194
1195 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1196 const char __user *buf, int in_len,
1197 int out_len)
1198 {
1199 struct ib_uverbs_resize_cq cmd;
1200 struct ib_uverbs_resize_cq_resp resp;
1201 struct ib_udata udata;
1202 struct ib_cq *cq;
1203 int ret = -EINVAL;
1204
1205 if (copy_from_user(&cmd, buf, sizeof cmd))
1206 return -EFAULT;
1207
1208 INIT_UDATA(&udata, buf + sizeof cmd,
1209 (unsigned long) cmd.response + sizeof resp,
1210 in_len - sizeof cmd, out_len - sizeof resp);
1211
1212 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1213 if (!cq)
1214 return -EINVAL;
1215
1216 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1217 if (ret)
1218 goto out;
1219
1220 resp.cqe = cq->cqe;
1221
1222 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1223 &resp, sizeof resp.cqe))
1224 ret = -EFAULT;
1225
1226 out:
1227 put_cq_read(cq);
1228
1229 return ret ? ret : in_len;
1230 }
1231
1232 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1233 {
1234 struct ib_uverbs_wc tmp;
1235
1236 tmp.wr_id = wc->wr_id;
1237 tmp.status = wc->status;
1238 tmp.opcode = wc->opcode;
1239 tmp.vendor_err = wc->vendor_err;
1240 tmp.byte_len = wc->byte_len;
1241 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1242 tmp.qp_num = wc->qp->qp_num;
1243 tmp.src_qp = wc->src_qp;
1244 tmp.wc_flags = wc->wc_flags;
1245 tmp.pkey_index = wc->pkey_index;
1246 tmp.slid = wc->slid;
1247 tmp.sl = wc->sl;
1248 tmp.dlid_path_bits = wc->dlid_path_bits;
1249 tmp.port_num = wc->port_num;
1250 tmp.reserved = 0;
1251
1252 if (copy_to_user(dest, &tmp, sizeof tmp))
1253 return -EFAULT;
1254
1255 return 0;
1256 }
1257
1258 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1259 const char __user *buf, int in_len,
1260 int out_len)
1261 {
1262 struct ib_uverbs_poll_cq cmd;
1263 struct ib_uverbs_poll_cq_resp resp;
1264 u8 __user *header_ptr;
1265 u8 __user *data_ptr;
1266 struct ib_cq *cq;
1267 struct ib_wc wc;
1268 int ret;
1269
1270 if (copy_from_user(&cmd, buf, sizeof cmd))
1271 return -EFAULT;
1272
1273 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1274 if (!cq)
1275 return -EINVAL;
1276
1277 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1278 header_ptr = (void __user *)(unsigned long) cmd.response;
1279 data_ptr = header_ptr + sizeof resp;
1280
1281 memset(&resp, 0, sizeof resp);
1282 while (resp.count < cmd.ne) {
1283 ret = ib_poll_cq(cq, 1, &wc);
1284 if (ret < 0)
1285 goto out_put;
1286 if (!ret)
1287 break;
1288
1289 ret = copy_wc_to_user(data_ptr, &wc);
1290 if (ret)
1291 goto out_put;
1292
1293 data_ptr += sizeof(struct ib_uverbs_wc);
1294 ++resp.count;
1295 }
1296
1297 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1298 ret = -EFAULT;
1299 goto out_put;
1300 }
1301
1302 ret = in_len;
1303
1304 out_put:
1305 put_cq_read(cq);
1306 return ret;
1307 }
1308
1309 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1310 const char __user *buf, int in_len,
1311 int out_len)
1312 {
1313 struct ib_uverbs_req_notify_cq cmd;
1314 struct ib_cq *cq;
1315
1316 if (copy_from_user(&cmd, buf, sizeof cmd))
1317 return -EFAULT;
1318
1319 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1320 if (!cq)
1321 return -EINVAL;
1322
1323 ib_req_notify_cq(cq, cmd.solicited_only ?
1324 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1325
1326 put_cq_read(cq);
1327
1328 return in_len;
1329 }
1330
1331 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1332 const char __user *buf, int in_len,
1333 int out_len)
1334 {
1335 struct ib_uverbs_destroy_cq cmd;
1336 struct ib_uverbs_destroy_cq_resp resp;
1337 struct ib_uobject *uobj;
1338 struct ib_cq *cq;
1339 struct ib_ucq_object *obj;
1340 struct ib_uverbs_event_file *ev_file;
1341 int ret = -EINVAL;
1342
1343 if (copy_from_user(&cmd, buf, sizeof cmd))
1344 return -EFAULT;
1345
1346 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1347 if (!uobj)
1348 return -EINVAL;
1349 cq = uobj->object;
1350 ev_file = cq->cq_context;
1351 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1352
1353 ret = ib_destroy_cq(cq);
1354 if (!ret)
1355 uobj->live = 0;
1356
1357 put_uobj_write(uobj);
1358
1359 if (ret)
1360 return ret;
1361
1362 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1363
1364 mutex_lock(&file->mutex);
1365 list_del(&uobj->list);
1366 mutex_unlock(&file->mutex);
1367
1368 ib_uverbs_release_ucq(file, ev_file, obj);
1369
1370 memset(&resp, 0, sizeof resp);
1371 resp.comp_events_reported = obj->comp_events_reported;
1372 resp.async_events_reported = obj->async_events_reported;
1373
1374 put_uobj(uobj);
1375
1376 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1377 &resp, sizeof resp))
1378 return -EFAULT;
1379
1380 return in_len;
1381 }
1382
1383 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1384 const char __user *buf, int in_len,
1385 int out_len)
1386 {
1387 struct ib_uverbs_create_qp cmd;
1388 struct ib_uverbs_create_qp_resp resp;
1389 struct ib_udata udata;
1390 struct ib_uqp_object *obj;
1391 struct ib_device *device;
1392 struct ib_pd *pd = NULL;
1393 struct ib_xrcd *xrcd = NULL;
1394 struct ib_uobject *uninitialized_var(xrcd_uobj);
1395 struct ib_cq *scq = NULL, *rcq = NULL;
1396 struct ib_srq *srq = NULL;
1397 struct ib_qp *qp;
1398 struct ib_qp_init_attr attr;
1399 int ret;
1400
1401 if (out_len < sizeof resp)
1402 return -ENOSPC;
1403
1404 if (copy_from_user(&cmd, buf, sizeof cmd))
1405 return -EFAULT;
1406
1407 if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1408 return -EPERM;
1409
1410 INIT_UDATA(&udata, buf + sizeof cmd,
1411 (unsigned long) cmd.response + sizeof resp,
1412 in_len - sizeof cmd, out_len - sizeof resp);
1413
1414 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1415 if (!obj)
1416 return -ENOMEM;
1417
1418 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1419 down_write(&obj->uevent.uobject.mutex);
1420
1421 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1422 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1423 if (!xrcd) {
1424 ret = -EINVAL;
1425 goto err_put;
1426 }
1427 device = xrcd->device;
1428 } else {
1429 if (cmd.qp_type == IB_QPT_XRC_INI) {
1430 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1431 } else {
1432 if (cmd.is_srq) {
1433 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1434 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1435 ret = -EINVAL;
1436 goto err_put;
1437 }
1438 }
1439
1440 if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1441 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1442 if (!rcq) {
1443 ret = -EINVAL;
1444 goto err_put;
1445 }
1446 }
1447 }
1448
1449 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1450 rcq = rcq ?: scq;
1451 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1452 if (!pd || !scq) {
1453 ret = -EINVAL;
1454 goto err_put;
1455 }
1456
1457 device = pd->device;
1458 }
1459
1460 attr.event_handler = ib_uverbs_qp_event_handler;
1461 attr.qp_context = file;
1462 attr.send_cq = scq;
1463 attr.recv_cq = rcq;
1464 attr.srq = srq;
1465 attr.xrcd = xrcd;
1466 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1467 attr.qp_type = cmd.qp_type;
1468 attr.create_flags = 0;
1469
1470 attr.cap.max_send_wr = cmd.max_send_wr;
1471 attr.cap.max_recv_wr = cmd.max_recv_wr;
1472 attr.cap.max_send_sge = cmd.max_send_sge;
1473 attr.cap.max_recv_sge = cmd.max_recv_sge;
1474 attr.cap.max_inline_data = cmd.max_inline_data;
1475
1476 obj->uevent.events_reported = 0;
1477 INIT_LIST_HEAD(&obj->uevent.event_list);
1478 INIT_LIST_HEAD(&obj->mcast_list);
1479
1480 if (cmd.qp_type == IB_QPT_XRC_TGT)
1481 qp = ib_create_qp(pd, &attr);
1482 else
1483 qp = device->create_qp(pd, &attr, &udata);
1484
1485 if (IS_ERR(qp)) {
1486 ret = PTR_ERR(qp);
1487 goto err_put;
1488 }
1489
1490 if (cmd.qp_type != IB_QPT_XRC_TGT) {
1491 qp->real_qp = qp;
1492 qp->device = device;
1493 qp->pd = pd;
1494 qp->send_cq = attr.send_cq;
1495 qp->recv_cq = attr.recv_cq;
1496 qp->srq = attr.srq;
1497 qp->event_handler = attr.event_handler;
1498 qp->qp_context = attr.qp_context;
1499 qp->qp_type = attr.qp_type;
1500 atomic_set(&qp->usecnt, 0);
1501 atomic_inc(&pd->usecnt);
1502 atomic_inc(&attr.send_cq->usecnt);
1503 if (attr.recv_cq)
1504 atomic_inc(&attr.recv_cq->usecnt);
1505 if (attr.srq)
1506 atomic_inc(&attr.srq->usecnt);
1507 }
1508 qp->uobject = &obj->uevent.uobject;
1509
1510 obj->uevent.uobject.object = qp;
1511 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1512 if (ret)
1513 goto err_destroy;
1514
1515 memset(&resp, 0, sizeof resp);
1516 resp.qpn = qp->qp_num;
1517 resp.qp_handle = obj->uevent.uobject.id;
1518 resp.max_recv_sge = attr.cap.max_recv_sge;
1519 resp.max_send_sge = attr.cap.max_send_sge;
1520 resp.max_recv_wr = attr.cap.max_recv_wr;
1521 resp.max_send_wr = attr.cap.max_send_wr;
1522 resp.max_inline_data = attr.cap.max_inline_data;
1523
1524 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1525 &resp, sizeof resp)) {
1526 ret = -EFAULT;
1527 goto err_copy;
1528 }
1529
1530 if (xrcd)
1531 put_xrcd_read(xrcd_uobj);
1532 if (pd)
1533 put_pd_read(pd);
1534 if (scq)
1535 put_cq_read(scq);
1536 if (rcq && rcq != scq)
1537 put_cq_read(rcq);
1538 if (srq)
1539 put_srq_read(srq);
1540
1541 mutex_lock(&file->mutex);
1542 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1543 mutex_unlock(&file->mutex);
1544
1545 obj->uevent.uobject.live = 1;
1546
1547 up_write(&obj->uevent.uobject.mutex);
1548
1549 return in_len;
1550
1551 err_copy:
1552 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1553
1554 err_destroy:
1555 ib_destroy_qp(qp);
1556
1557 err_put:
1558 if (xrcd)
1559 put_xrcd_read(xrcd_uobj);
1560 if (pd)
1561 put_pd_read(pd);
1562 if (scq)
1563 put_cq_read(scq);
1564 if (rcq && rcq != scq)
1565 put_cq_read(rcq);
1566 if (srq)
1567 put_srq_read(srq);
1568
1569 put_uobj_write(&obj->uevent.uobject);
1570 return ret;
1571 }
1572
1573 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1574 const char __user *buf, int in_len, int out_len)
1575 {
1576 struct ib_uverbs_open_qp cmd;
1577 struct ib_uverbs_create_qp_resp resp;
1578 struct ib_udata udata;
1579 struct ib_uqp_object *obj;
1580 struct ib_xrcd *xrcd;
1581 struct ib_uobject *uninitialized_var(xrcd_uobj);
1582 struct ib_qp *qp;
1583 struct ib_qp_open_attr attr;
1584 int ret;
1585
1586 if (out_len < sizeof resp)
1587 return -ENOSPC;
1588
1589 if (copy_from_user(&cmd, buf, sizeof cmd))
1590 return -EFAULT;
1591
1592 INIT_UDATA(&udata, buf + sizeof cmd,
1593 (unsigned long) cmd.response + sizeof resp,
1594 in_len - sizeof cmd, out_len - sizeof resp);
1595
1596 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1597 if (!obj)
1598 return -ENOMEM;
1599
1600 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1601 down_write(&obj->uevent.uobject.mutex);
1602
1603 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1604 if (!xrcd) {
1605 ret = -EINVAL;
1606 goto err_put;
1607 }
1608
1609 attr.event_handler = ib_uverbs_qp_event_handler;
1610 attr.qp_context = file;
1611 attr.qp_num = cmd.qpn;
1612 attr.qp_type = cmd.qp_type;
1613
1614 obj->uevent.events_reported = 0;
1615 INIT_LIST_HEAD(&obj->uevent.event_list);
1616 INIT_LIST_HEAD(&obj->mcast_list);
1617
1618 qp = ib_open_qp(xrcd, &attr);
1619 if (IS_ERR(qp)) {
1620 ret = PTR_ERR(qp);
1621 goto err_put;
1622 }
1623
1624 qp->uobject = &obj->uevent.uobject;
1625
1626 obj->uevent.uobject.object = qp;
1627 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1628 if (ret)
1629 goto err_destroy;
1630
1631 memset(&resp, 0, sizeof resp);
1632 resp.qpn = qp->qp_num;
1633 resp.qp_handle = obj->uevent.uobject.id;
1634
1635 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1636 &resp, sizeof resp)) {
1637 ret = -EFAULT;
1638 goto err_remove;
1639 }
1640
1641 put_xrcd_read(xrcd_uobj);
1642
1643 mutex_lock(&file->mutex);
1644 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1645 mutex_unlock(&file->mutex);
1646
1647 obj->uevent.uobject.live = 1;
1648
1649 up_write(&obj->uevent.uobject.mutex);
1650
1651 return in_len;
1652
1653 err_remove:
1654 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1655
1656 err_destroy:
1657 ib_destroy_qp(qp);
1658
1659 err_put:
1660 put_xrcd_read(xrcd_uobj);
1661 put_uobj_write(&obj->uevent.uobject);
1662 return ret;
1663 }
1664
1665 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1666 const char __user *buf, int in_len,
1667 int out_len)
1668 {
1669 struct ib_uverbs_query_qp cmd;
1670 struct ib_uverbs_query_qp_resp resp;
1671 struct ib_qp *qp;
1672 struct ib_qp_attr *attr;
1673 struct ib_qp_init_attr *init_attr;
1674 int ret;
1675
1676 if (copy_from_user(&cmd, buf, sizeof cmd))
1677 return -EFAULT;
1678
1679 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1680 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1681 if (!attr || !init_attr) {
1682 ret = -ENOMEM;
1683 goto out;
1684 }
1685
1686 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1687 if (!qp) {
1688 ret = -EINVAL;
1689 goto out;
1690 }
1691
1692 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1693
1694 put_qp_read(qp);
1695
1696 if (ret)
1697 goto out;
1698
1699 memset(&resp, 0, sizeof resp);
1700
1701 resp.qp_state = attr->qp_state;
1702 resp.cur_qp_state = attr->cur_qp_state;
1703 resp.path_mtu = attr->path_mtu;
1704 resp.path_mig_state = attr->path_mig_state;
1705 resp.qkey = attr->qkey;
1706 resp.rq_psn = attr->rq_psn;
1707 resp.sq_psn = attr->sq_psn;
1708 resp.dest_qp_num = attr->dest_qp_num;
1709 resp.qp_access_flags = attr->qp_access_flags;
1710 resp.pkey_index = attr->pkey_index;
1711 resp.alt_pkey_index = attr->alt_pkey_index;
1712 resp.sq_draining = attr->sq_draining;
1713 resp.max_rd_atomic = attr->max_rd_atomic;
1714 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1715 resp.min_rnr_timer = attr->min_rnr_timer;
1716 resp.port_num = attr->port_num;
1717 resp.timeout = attr->timeout;
1718 resp.retry_cnt = attr->retry_cnt;
1719 resp.rnr_retry = attr->rnr_retry;
1720 resp.alt_port_num = attr->alt_port_num;
1721 resp.alt_timeout = attr->alt_timeout;
1722
1723 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1724 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1725 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1726 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1727 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1728 resp.dest.dlid = attr->ah_attr.dlid;
1729 resp.dest.sl = attr->ah_attr.sl;
1730 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1731 resp.dest.static_rate = attr->ah_attr.static_rate;
1732 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1733 resp.dest.port_num = attr->ah_attr.port_num;
1734
1735 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1736 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1737 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1738 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1739 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1740 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1741 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1742 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1743 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1744 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1745 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1746
1747 resp.max_send_wr = init_attr->cap.max_send_wr;
1748 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1749 resp.max_send_sge = init_attr->cap.max_send_sge;
1750 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1751 resp.max_inline_data = init_attr->cap.max_inline_data;
1752 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1753
1754 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1755 &resp, sizeof resp))
1756 ret = -EFAULT;
1757
1758 out:
1759 kfree(attr);
1760 kfree(init_attr);
1761
1762 return ret ? ret : in_len;
1763 }
1764
1765 /* Remove ignored fields set in the attribute mask */
1766 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1767 {
1768 switch (qp_type) {
1769 case IB_QPT_XRC_INI:
1770 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1771 case IB_QPT_XRC_TGT:
1772 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1773 IB_QP_RNR_RETRY);
1774 default:
1775 return mask;
1776 }
1777 }
1778
1779 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1780 const char __user *buf, int in_len,
1781 int out_len)
1782 {
1783 struct ib_uverbs_modify_qp cmd;
1784 struct ib_udata udata;
1785 struct ib_qp *qp;
1786 struct ib_qp_attr *attr;
1787 int ret;
1788
1789 if (copy_from_user(&cmd, buf, sizeof cmd))
1790 return -EFAULT;
1791
1792 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1793 out_len);
1794
1795 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1796 if (!attr)
1797 return -ENOMEM;
1798
1799 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1800 if (!qp) {
1801 ret = -EINVAL;
1802 goto out;
1803 }
1804
1805 attr->qp_state = cmd.qp_state;
1806 attr->cur_qp_state = cmd.cur_qp_state;
1807 attr->path_mtu = cmd.path_mtu;
1808 attr->path_mig_state = cmd.path_mig_state;
1809 attr->qkey = cmd.qkey;
1810 attr->rq_psn = cmd.rq_psn;
1811 attr->sq_psn = cmd.sq_psn;
1812 attr->dest_qp_num = cmd.dest_qp_num;
1813 attr->qp_access_flags = cmd.qp_access_flags;
1814 attr->pkey_index = cmd.pkey_index;
1815 attr->alt_pkey_index = cmd.alt_pkey_index;
1816 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1817 attr->max_rd_atomic = cmd.max_rd_atomic;
1818 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1819 attr->min_rnr_timer = cmd.min_rnr_timer;
1820 attr->port_num = cmd.port_num;
1821 attr->timeout = cmd.timeout;
1822 attr->retry_cnt = cmd.retry_cnt;
1823 attr->rnr_retry = cmd.rnr_retry;
1824 attr->alt_port_num = cmd.alt_port_num;
1825 attr->alt_timeout = cmd.alt_timeout;
1826
1827 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1828 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1829 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1830 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1831 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1832 attr->ah_attr.dlid = cmd.dest.dlid;
1833 attr->ah_attr.sl = cmd.dest.sl;
1834 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1835 attr->ah_attr.static_rate = cmd.dest.static_rate;
1836 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1837 attr->ah_attr.port_num = cmd.dest.port_num;
1838
1839 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1840 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1841 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1842 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1843 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1844 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1845 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1846 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1847 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1848 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1849 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1850
1851 if (qp->real_qp == qp) {
1852 ret = qp->device->modify_qp(qp, attr,
1853 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
1854 } else {
1855 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
1856 }
1857
1858 put_qp_read(qp);
1859
1860 if (ret)
1861 goto out;
1862
1863 ret = in_len;
1864
1865 out:
1866 kfree(attr);
1867
1868 return ret;
1869 }
1870
1871 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1872 const char __user *buf, int in_len,
1873 int out_len)
1874 {
1875 struct ib_uverbs_destroy_qp cmd;
1876 struct ib_uverbs_destroy_qp_resp resp;
1877 struct ib_uobject *uobj;
1878 struct ib_qp *qp;
1879 struct ib_uqp_object *obj;
1880 int ret = -EINVAL;
1881
1882 if (copy_from_user(&cmd, buf, sizeof cmd))
1883 return -EFAULT;
1884
1885 memset(&resp, 0, sizeof resp);
1886
1887 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1888 if (!uobj)
1889 return -EINVAL;
1890 qp = uobj->object;
1891 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1892
1893 if (!list_empty(&obj->mcast_list)) {
1894 put_uobj_write(uobj);
1895 return -EBUSY;
1896 }
1897
1898 ret = ib_destroy_qp(qp);
1899 if (!ret)
1900 uobj->live = 0;
1901
1902 put_uobj_write(uobj);
1903
1904 if (ret)
1905 return ret;
1906
1907 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1908
1909 mutex_lock(&file->mutex);
1910 list_del(&uobj->list);
1911 mutex_unlock(&file->mutex);
1912
1913 ib_uverbs_release_uevent(file, &obj->uevent);
1914
1915 resp.events_reported = obj->uevent.events_reported;
1916
1917 put_uobj(uobj);
1918
1919 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1920 &resp, sizeof resp))
1921 return -EFAULT;
1922
1923 return in_len;
1924 }
1925
1926 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1927 const char __user *buf, int in_len,
1928 int out_len)
1929 {
1930 struct ib_uverbs_post_send cmd;
1931 struct ib_uverbs_post_send_resp resp;
1932 struct ib_uverbs_send_wr *user_wr;
1933 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1934 struct ib_qp *qp;
1935 int i, sg_ind;
1936 int is_ud;
1937 ssize_t ret = -EINVAL;
1938
1939 if (copy_from_user(&cmd, buf, sizeof cmd))
1940 return -EFAULT;
1941
1942 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1943 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1944 return -EINVAL;
1945
1946 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1947 return -EINVAL;
1948
1949 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1950 if (!user_wr)
1951 return -ENOMEM;
1952
1953 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1954 if (!qp)
1955 goto out;
1956
1957 is_ud = qp->qp_type == IB_QPT_UD;
1958 sg_ind = 0;
1959 last = NULL;
1960 for (i = 0; i < cmd.wr_count; ++i) {
1961 if (copy_from_user(user_wr,
1962 buf + sizeof cmd + i * cmd.wqe_size,
1963 cmd.wqe_size)) {
1964 ret = -EFAULT;
1965 goto out_put;
1966 }
1967
1968 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1969 ret = -EINVAL;
1970 goto out_put;
1971 }
1972
1973 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1974 user_wr->num_sge * sizeof (struct ib_sge),
1975 GFP_KERNEL);
1976 if (!next) {
1977 ret = -ENOMEM;
1978 goto out_put;
1979 }
1980
1981 if (!last)
1982 wr = next;
1983 else
1984 last->next = next;
1985 last = next;
1986
1987 next->next = NULL;
1988 next->wr_id = user_wr->wr_id;
1989 next->num_sge = user_wr->num_sge;
1990 next->opcode = user_wr->opcode;
1991 next->send_flags = user_wr->send_flags;
1992
1993 if (is_ud) {
1994 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1995 file->ucontext);
1996 if (!next->wr.ud.ah) {
1997 ret = -EINVAL;
1998 goto out_put;
1999 }
2000 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
2001 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
2002 } else {
2003 switch (next->opcode) {
2004 case IB_WR_RDMA_WRITE_WITH_IMM:
2005 next->ex.imm_data =
2006 (__be32 __force) user_wr->ex.imm_data;
2007 case IB_WR_RDMA_WRITE:
2008 case IB_WR_RDMA_READ:
2009 next->wr.rdma.remote_addr =
2010 user_wr->wr.rdma.remote_addr;
2011 next->wr.rdma.rkey =
2012 user_wr->wr.rdma.rkey;
2013 break;
2014 case IB_WR_SEND_WITH_IMM:
2015 next->ex.imm_data =
2016 (__be32 __force) user_wr->ex.imm_data;
2017 break;
2018 case IB_WR_SEND_WITH_INV:
2019 next->ex.invalidate_rkey =
2020 user_wr->ex.invalidate_rkey;
2021 break;
2022 case IB_WR_ATOMIC_CMP_AND_SWP:
2023 case IB_WR_ATOMIC_FETCH_AND_ADD:
2024 next->wr.atomic.remote_addr =
2025 user_wr->wr.atomic.remote_addr;
2026 next->wr.atomic.compare_add =
2027 user_wr->wr.atomic.compare_add;
2028 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2029 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2030 break;
2031 default:
2032 break;
2033 }
2034 }
2035
2036 if (next->num_sge) {
2037 next->sg_list = (void *) next +
2038 ALIGN(sizeof *next, sizeof (struct ib_sge));
2039 if (copy_from_user(next->sg_list,
2040 buf + sizeof cmd +
2041 cmd.wr_count * cmd.wqe_size +
2042 sg_ind * sizeof (struct ib_sge),
2043 next->num_sge * sizeof (struct ib_sge))) {
2044 ret = -EFAULT;
2045 goto out_put;
2046 }
2047 sg_ind += next->num_sge;
2048 } else
2049 next->sg_list = NULL;
2050 }
2051
2052 resp.bad_wr = 0;
2053 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2054 if (ret)
2055 for (next = wr; next; next = next->next) {
2056 ++resp.bad_wr;
2057 if (next == bad_wr)
2058 break;
2059 }
2060
2061 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2062 &resp, sizeof resp))
2063 ret = -EFAULT;
2064
2065 out_put:
2066 put_qp_read(qp);
2067
2068 while (wr) {
2069 if (is_ud && wr->wr.ud.ah)
2070 put_ah_read(wr->wr.ud.ah);
2071 next = wr->next;
2072 kfree(wr);
2073 wr = next;
2074 }
2075
2076 out:
2077 kfree(user_wr);
2078
2079 return ret ? ret : in_len;
2080 }
2081
2082 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2083 int in_len,
2084 u32 wr_count,
2085 u32 sge_count,
2086 u32 wqe_size)
2087 {
2088 struct ib_uverbs_recv_wr *user_wr;
2089 struct ib_recv_wr *wr = NULL, *last, *next;
2090 int sg_ind;
2091 int i;
2092 int ret;
2093
2094 if (in_len < wqe_size * wr_count +
2095 sge_count * sizeof (struct ib_uverbs_sge))
2096 return ERR_PTR(-EINVAL);
2097
2098 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2099 return ERR_PTR(-EINVAL);
2100
2101 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2102 if (!user_wr)
2103 return ERR_PTR(-ENOMEM);
2104
2105 sg_ind = 0;
2106 last = NULL;
2107 for (i = 0; i < wr_count; ++i) {
2108 if (copy_from_user(user_wr, buf + i * wqe_size,
2109 wqe_size)) {
2110 ret = -EFAULT;
2111 goto err;
2112 }
2113
2114 if (user_wr->num_sge + sg_ind > sge_count) {
2115 ret = -EINVAL;
2116 goto err;
2117 }
2118
2119 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2120 user_wr->num_sge * sizeof (struct ib_sge),
2121 GFP_KERNEL);
2122 if (!next) {
2123 ret = -ENOMEM;
2124 goto err;
2125 }
2126
2127 if (!last)
2128 wr = next;
2129 else
2130 last->next = next;
2131 last = next;
2132
2133 next->next = NULL;
2134 next->wr_id = user_wr->wr_id;
2135 next->num_sge = user_wr->num_sge;
2136
2137 if (next->num_sge) {
2138 next->sg_list = (void *) next +
2139 ALIGN(sizeof *next, sizeof (struct ib_sge));
2140 if (copy_from_user(next->sg_list,
2141 buf + wr_count * wqe_size +
2142 sg_ind * sizeof (struct ib_sge),
2143 next->num_sge * sizeof (struct ib_sge))) {
2144 ret = -EFAULT;
2145 goto err;
2146 }
2147 sg_ind += next->num_sge;
2148 } else
2149 next->sg_list = NULL;
2150 }
2151
2152 kfree(user_wr);
2153 return wr;
2154
2155 err:
2156 kfree(user_wr);
2157
2158 while (wr) {
2159 next = wr->next;
2160 kfree(wr);
2161 wr = next;
2162 }
2163
2164 return ERR_PTR(ret);
2165 }
2166
2167 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2168 const char __user *buf, int in_len,
2169 int out_len)
2170 {
2171 struct ib_uverbs_post_recv cmd;
2172 struct ib_uverbs_post_recv_resp resp;
2173 struct ib_recv_wr *wr, *next, *bad_wr;
2174 struct ib_qp *qp;
2175 ssize_t ret = -EINVAL;
2176
2177 if (copy_from_user(&cmd, buf, sizeof cmd))
2178 return -EFAULT;
2179
2180 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2181 in_len - sizeof cmd, cmd.wr_count,
2182 cmd.sge_count, cmd.wqe_size);
2183 if (IS_ERR(wr))
2184 return PTR_ERR(wr);
2185
2186 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2187 if (!qp)
2188 goto out;
2189
2190 resp.bad_wr = 0;
2191 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2192
2193 put_qp_read(qp);
2194
2195 if (ret)
2196 for (next = wr; next; next = next->next) {
2197 ++resp.bad_wr;
2198 if (next == bad_wr)
2199 break;
2200 }
2201
2202 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2203 &resp, sizeof resp))
2204 ret = -EFAULT;
2205
2206 out:
2207 while (wr) {
2208 next = wr->next;
2209 kfree(wr);
2210 wr = next;
2211 }
2212
2213 return ret ? ret : in_len;
2214 }
2215
2216 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2217 const char __user *buf, int in_len,
2218 int out_len)
2219 {
2220 struct ib_uverbs_post_srq_recv cmd;
2221 struct ib_uverbs_post_srq_recv_resp resp;
2222 struct ib_recv_wr *wr, *next, *bad_wr;
2223 struct ib_srq *srq;
2224 ssize_t ret = -EINVAL;
2225
2226 if (copy_from_user(&cmd, buf, sizeof cmd))
2227 return -EFAULT;
2228
2229 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2230 in_len - sizeof cmd, cmd.wr_count,
2231 cmd.sge_count, cmd.wqe_size);
2232 if (IS_ERR(wr))
2233 return PTR_ERR(wr);
2234
2235 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2236 if (!srq)
2237 goto out;
2238
2239 resp.bad_wr = 0;
2240 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2241
2242 put_srq_read(srq);
2243
2244 if (ret)
2245 for (next = wr; next; next = next->next) {
2246 ++resp.bad_wr;
2247 if (next == bad_wr)
2248 break;
2249 }
2250
2251 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2252 &resp, sizeof resp))
2253 ret = -EFAULT;
2254
2255 out:
2256 while (wr) {
2257 next = wr->next;
2258 kfree(wr);
2259 wr = next;
2260 }
2261
2262 return ret ? ret : in_len;
2263 }
2264
2265 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2266 const char __user *buf, int in_len,
2267 int out_len)
2268 {
2269 struct ib_uverbs_create_ah cmd;
2270 struct ib_uverbs_create_ah_resp resp;
2271 struct ib_uobject *uobj;
2272 struct ib_pd *pd;
2273 struct ib_ah *ah;
2274 struct ib_ah_attr attr;
2275 int ret;
2276
2277 if (out_len < sizeof resp)
2278 return -ENOSPC;
2279
2280 if (copy_from_user(&cmd, buf, sizeof cmd))
2281 return -EFAULT;
2282
2283 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2284 if (!uobj)
2285 return -ENOMEM;
2286
2287 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2288 down_write(&uobj->mutex);
2289
2290 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2291 if (!pd) {
2292 ret = -EINVAL;
2293 goto err;
2294 }
2295
2296 attr.dlid = cmd.attr.dlid;
2297 attr.sl = cmd.attr.sl;
2298 attr.src_path_bits = cmd.attr.src_path_bits;
2299 attr.static_rate = cmd.attr.static_rate;
2300 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2301 attr.port_num = cmd.attr.port_num;
2302 attr.grh.flow_label = cmd.attr.grh.flow_label;
2303 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2304 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2305 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2306 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2307
2308 ah = ib_create_ah(pd, &attr);
2309 if (IS_ERR(ah)) {
2310 ret = PTR_ERR(ah);
2311 goto err_put;
2312 }
2313
2314 ah->uobject = uobj;
2315 uobj->object = ah;
2316
2317 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2318 if (ret)
2319 goto err_destroy;
2320
2321 resp.ah_handle = uobj->id;
2322
2323 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2324 &resp, sizeof resp)) {
2325 ret = -EFAULT;
2326 goto err_copy;
2327 }
2328
2329 put_pd_read(pd);
2330
2331 mutex_lock(&file->mutex);
2332 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2333 mutex_unlock(&file->mutex);
2334
2335 uobj->live = 1;
2336
2337 up_write(&uobj->mutex);
2338
2339 return in_len;
2340
2341 err_copy:
2342 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2343
2344 err_destroy:
2345 ib_destroy_ah(ah);
2346
2347 err_put:
2348 put_pd_read(pd);
2349
2350 err:
2351 put_uobj_write(uobj);
2352 return ret;
2353 }
2354
2355 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2356 const char __user *buf, int in_len, int out_len)
2357 {
2358 struct ib_uverbs_destroy_ah cmd;
2359 struct ib_ah *ah;
2360 struct ib_uobject *uobj;
2361 int ret;
2362
2363 if (copy_from_user(&cmd, buf, sizeof cmd))
2364 return -EFAULT;
2365
2366 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2367 if (!uobj)
2368 return -EINVAL;
2369 ah = uobj->object;
2370
2371 ret = ib_destroy_ah(ah);
2372 if (!ret)
2373 uobj->live = 0;
2374
2375 put_uobj_write(uobj);
2376
2377 if (ret)
2378 return ret;
2379
2380 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2381
2382 mutex_lock(&file->mutex);
2383 list_del(&uobj->list);
2384 mutex_unlock(&file->mutex);
2385
2386 put_uobj(uobj);
2387
2388 return in_len;
2389 }
2390
2391 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2392 const char __user *buf, int in_len,
2393 int out_len)
2394 {
2395 struct ib_uverbs_attach_mcast cmd;
2396 struct ib_qp *qp;
2397 struct ib_uqp_object *obj;
2398 struct ib_uverbs_mcast_entry *mcast;
2399 int ret;
2400
2401 if (copy_from_user(&cmd, buf, sizeof cmd))
2402 return -EFAULT;
2403
2404 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2405 if (!qp)
2406 return -EINVAL;
2407
2408 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2409
2410 list_for_each_entry(mcast, &obj->mcast_list, list)
2411 if (cmd.mlid == mcast->lid &&
2412 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2413 ret = 0;
2414 goto out_put;
2415 }
2416
2417 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2418 if (!mcast) {
2419 ret = -ENOMEM;
2420 goto out_put;
2421 }
2422
2423 mcast->lid = cmd.mlid;
2424 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2425
2426 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2427 if (!ret)
2428 list_add_tail(&mcast->list, &obj->mcast_list);
2429 else
2430 kfree(mcast);
2431
2432 out_put:
2433 put_qp_write(qp);
2434
2435 return ret ? ret : in_len;
2436 }
2437
2438 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2439 const char __user *buf, int in_len,
2440 int out_len)
2441 {
2442 struct ib_uverbs_detach_mcast cmd;
2443 struct ib_uqp_object *obj;
2444 struct ib_qp *qp;
2445 struct ib_uverbs_mcast_entry *mcast;
2446 int ret = -EINVAL;
2447
2448 if (copy_from_user(&cmd, buf, sizeof cmd))
2449 return -EFAULT;
2450
2451 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2452 if (!qp)
2453 return -EINVAL;
2454
2455 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2456 if (ret)
2457 goto out_put;
2458
2459 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2460
2461 list_for_each_entry(mcast, &obj->mcast_list, list)
2462 if (cmd.mlid == mcast->lid &&
2463 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2464 list_del(&mcast->list);
2465 kfree(mcast);
2466 break;
2467 }
2468
2469 out_put:
2470 put_qp_write(qp);
2471
2472 return ret ? ret : in_len;
2473 }
2474
2475 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
2476 struct ib_uverbs_create_xsrq *cmd,
2477 struct ib_udata *udata)
2478 {
2479 struct ib_uverbs_create_srq_resp resp;
2480 struct ib_usrq_object *obj;
2481 struct ib_pd *pd;
2482 struct ib_srq *srq;
2483 struct ib_uobject *uninitialized_var(xrcd_uobj);
2484 struct ib_srq_init_attr attr;
2485 int ret;
2486
2487 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2488 if (!obj)
2489 return -ENOMEM;
2490
2491 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
2492 down_write(&obj->uevent.uobject.mutex);
2493
2494 if (cmd->srq_type == IB_SRQT_XRC) {
2495 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
2496 if (!attr.ext.xrc.xrcd) {
2497 ret = -EINVAL;
2498 goto err;
2499 }
2500
2501 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2502 atomic_inc(&obj->uxrcd->refcnt);
2503
2504 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
2505 if (!attr.ext.xrc.cq) {
2506 ret = -EINVAL;
2507 goto err_put_xrcd;
2508 }
2509 }
2510
2511 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
2512 if (!pd) {
2513 ret = -EINVAL;
2514 goto err_put_cq;
2515 }
2516
2517 attr.event_handler = ib_uverbs_srq_event_handler;
2518 attr.srq_context = file;
2519 attr.srq_type = cmd->srq_type;
2520 attr.attr.max_wr = cmd->max_wr;
2521 attr.attr.max_sge = cmd->max_sge;
2522 attr.attr.srq_limit = cmd->srq_limit;
2523
2524 obj->uevent.events_reported = 0;
2525 INIT_LIST_HEAD(&obj->uevent.event_list);
2526
2527 srq = pd->device->create_srq(pd, &attr, udata);
2528 if (IS_ERR(srq)) {
2529 ret = PTR_ERR(srq);
2530 goto err_put;
2531 }
2532
2533 srq->device = pd->device;
2534 srq->pd = pd;
2535 srq->srq_type = cmd->srq_type;
2536 srq->uobject = &obj->uevent.uobject;
2537 srq->event_handler = attr.event_handler;
2538 srq->srq_context = attr.srq_context;
2539
2540 if (cmd->srq_type == IB_SRQT_XRC) {
2541 srq->ext.xrc.cq = attr.ext.xrc.cq;
2542 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
2543 atomic_inc(&attr.ext.xrc.cq->usecnt);
2544 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
2545 }
2546
2547 atomic_inc(&pd->usecnt);
2548 atomic_set(&srq->usecnt, 0);
2549
2550 obj->uevent.uobject.object = srq;
2551 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2552 if (ret)
2553 goto err_destroy;
2554
2555 memset(&resp, 0, sizeof resp);
2556 resp.srq_handle = obj->uevent.uobject.id;
2557 resp.max_wr = attr.attr.max_wr;
2558 resp.max_sge = attr.attr.max_sge;
2559 if (cmd->srq_type == IB_SRQT_XRC)
2560 resp.srqn = srq->ext.xrc.srq_num;
2561
2562 if (copy_to_user((void __user *) (unsigned long) cmd->response,
2563 &resp, sizeof resp)) {
2564 ret = -EFAULT;
2565 goto err_copy;
2566 }
2567
2568 if (cmd->srq_type == IB_SRQT_XRC) {
2569 put_uobj_read(xrcd_uobj);
2570 put_cq_read(attr.ext.xrc.cq);
2571 }
2572 put_pd_read(pd);
2573
2574 mutex_lock(&file->mutex);
2575 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
2576 mutex_unlock(&file->mutex);
2577
2578 obj->uevent.uobject.live = 1;
2579
2580 up_write(&obj->uevent.uobject.mutex);
2581
2582 return 0;
2583
2584 err_copy:
2585 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2586
2587 err_destroy:
2588 ib_destroy_srq(srq);
2589
2590 err_put:
2591 put_pd_read(pd);
2592
2593 err_put_cq:
2594 if (cmd->srq_type == IB_SRQT_XRC)
2595 put_cq_read(attr.ext.xrc.cq);
2596
2597 err_put_xrcd:
2598 if (cmd->srq_type == IB_SRQT_XRC) {
2599 atomic_dec(&obj->uxrcd->refcnt);
2600 put_uobj_read(xrcd_uobj);
2601 }
2602
2603 err:
2604 put_uobj_write(&obj->uevent.uobject);
2605 return ret;
2606 }
2607
2608 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
2609 const char __user *buf, int in_len,
2610 int out_len)
2611 {
2612 struct ib_uverbs_create_srq cmd;
2613 struct ib_uverbs_create_xsrq xcmd;
2614 struct ib_uverbs_create_srq_resp resp;
2615 struct ib_udata udata;
2616 int ret;
2617
2618 if (out_len < sizeof resp)
2619 return -ENOSPC;
2620
2621 if (copy_from_user(&cmd, buf, sizeof cmd))
2622 return -EFAULT;
2623
2624 xcmd.response = cmd.response;
2625 xcmd.user_handle = cmd.user_handle;
2626 xcmd.srq_type = IB_SRQT_BASIC;
2627 xcmd.pd_handle = cmd.pd_handle;
2628 xcmd.max_wr = cmd.max_wr;
2629 xcmd.max_sge = cmd.max_sge;
2630 xcmd.srq_limit = cmd.srq_limit;
2631
2632 INIT_UDATA(&udata, buf + sizeof cmd,
2633 (unsigned long) cmd.response + sizeof resp,
2634 in_len - sizeof cmd, out_len - sizeof resp);
2635
2636 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
2637 if (ret)
2638 return ret;
2639
2640 return in_len;
2641 }
2642
2643 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
2644 const char __user *buf, int in_len, int out_len)
2645 {
2646 struct ib_uverbs_create_xsrq cmd;
2647 struct ib_uverbs_create_srq_resp resp;
2648 struct ib_udata udata;
2649 int ret;
2650
2651 if (out_len < sizeof resp)
2652 return -ENOSPC;
2653
2654 if (copy_from_user(&cmd, buf, sizeof cmd))
2655 return -EFAULT;
2656
2657 INIT_UDATA(&udata, buf + sizeof cmd,
2658 (unsigned long) cmd.response + sizeof resp,
2659 in_len - sizeof cmd, out_len - sizeof resp);
2660
2661 ret = __uverbs_create_xsrq(file, &cmd, &udata);
2662 if (ret)
2663 return ret;
2664
2665 return in_len;
2666 }
2667
2668 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2669 const char __user *buf, int in_len,
2670 int out_len)
2671 {
2672 struct ib_uverbs_modify_srq cmd;
2673 struct ib_udata udata;
2674 struct ib_srq *srq;
2675 struct ib_srq_attr attr;
2676 int ret;
2677
2678 if (copy_from_user(&cmd, buf, sizeof cmd))
2679 return -EFAULT;
2680
2681 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2682 out_len);
2683
2684 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2685 if (!srq)
2686 return -EINVAL;
2687
2688 attr.max_wr = cmd.max_wr;
2689 attr.srq_limit = cmd.srq_limit;
2690
2691 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2692
2693 put_srq_read(srq);
2694
2695 return ret ? ret : in_len;
2696 }
2697
2698 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2699 const char __user *buf,
2700 int in_len, int out_len)
2701 {
2702 struct ib_uverbs_query_srq cmd;
2703 struct ib_uverbs_query_srq_resp resp;
2704 struct ib_srq_attr attr;
2705 struct ib_srq *srq;
2706 int ret;
2707
2708 if (out_len < sizeof resp)
2709 return -ENOSPC;
2710
2711 if (copy_from_user(&cmd, buf, sizeof cmd))
2712 return -EFAULT;
2713
2714 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2715 if (!srq)
2716 return -EINVAL;
2717
2718 ret = ib_query_srq(srq, &attr);
2719
2720 put_srq_read(srq);
2721
2722 if (ret)
2723 return ret;
2724
2725 memset(&resp, 0, sizeof resp);
2726
2727 resp.max_wr = attr.max_wr;
2728 resp.max_sge = attr.max_sge;
2729 resp.srq_limit = attr.srq_limit;
2730
2731 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2732 &resp, sizeof resp))
2733 return -EFAULT;
2734
2735 return in_len;
2736 }
2737
2738 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2739 const char __user *buf, int in_len,
2740 int out_len)
2741 {
2742 struct ib_uverbs_destroy_srq cmd;
2743 struct ib_uverbs_destroy_srq_resp resp;
2744 struct ib_uobject *uobj;
2745 struct ib_srq *srq;
2746 struct ib_uevent_object *obj;
2747 int ret = -EINVAL;
2748
2749 if (copy_from_user(&cmd, buf, sizeof cmd))
2750 return -EFAULT;
2751
2752 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2753 if (!uobj)
2754 return -EINVAL;
2755 srq = uobj->object;
2756 obj = container_of(uobj, struct ib_uevent_object, uobject);
2757
2758 ret = ib_destroy_srq(srq);
2759 if (!ret)
2760 uobj->live = 0;
2761
2762 put_uobj_write(uobj);
2763
2764 if (ret)
2765 return ret;
2766
2767 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2768
2769 mutex_lock(&file->mutex);
2770 list_del(&uobj->list);
2771 mutex_unlock(&file->mutex);
2772
2773 ib_uverbs_release_uevent(file, obj);
2774
2775 memset(&resp, 0, sizeof resp);
2776 resp.events_reported = obj->events_reported;
2777
2778 put_uobj(uobj);
2779
2780 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2781 &resp, sizeof resp))
2782 ret = -EFAULT;
2783
2784 return ret ? ret : in_len;
2785 }