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Input: evdev - never leave the client buffer empty after write
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / infiniband / core / uverbs_cmd.c
blob6fcfbeb24a234a419ec9313c956c7c4ba581bcf6
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36 #include <linux/file.h>
37 #include <linux/fs.h>
38 #include <linux/slab.h>
39
40 #include <asm/uaccess.h>
41
42 #include "uverbs.h"
43
44 static struct lock_class_key pd_lock_key;
45 static struct lock_class_key mr_lock_key;
46 static struct lock_class_key cq_lock_key;
47 static struct lock_class_key qp_lock_key;
48 static struct lock_class_key ah_lock_key;
49 static struct lock_class_key srq_lock_key;
50
51 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
52 do { \
53 (udata)->inbuf = (void __user *) (ibuf); \
54 (udata)->outbuf = (void __user *) (obuf); \
55 (udata)->inlen = (ilen); \
56 (udata)->outlen = (olen); \
57 } while (0)
58
59 /*
60 * The ib_uobject locking scheme is as follows:
61 *
62 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
63 * needs to be held during all idr operations. When an object is
64 * looked up, a reference must be taken on the object's kref before
65 * dropping this lock.
66 *
67 * - Each object also has an rwsem. This rwsem must be held for
68 * reading while an operation that uses the object is performed.
69 * For example, while registering an MR, the associated PD's
70 * uobject.mutex must be held for reading. The rwsem must be held
71 * for writing while initializing or destroying an object.
72 *
73 * - In addition, each object has a "live" flag. If this flag is not
74 * set, then lookups of the object will fail even if it is found in
75 * the idr. This handles a reader that blocks and does not acquire
76 * the rwsem until after the object is destroyed. The destroy
77 * operation will set the live flag to 0 and then drop the rwsem;
78 * this will allow the reader to acquire the rwsem, see that the
79 * live flag is 0, and then drop the rwsem and its reference to
80 * object. The underlying storage will not be freed until the last
81 * reference to the object is dropped.
82 */
83
84 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
85 struct ib_ucontext *context, struct lock_class_key *key)
86 {
87 uobj->user_handle = user_handle;
88 uobj->context = context;
89 kref_init(&uobj->ref);
90 init_rwsem(&uobj->mutex);
91 lockdep_set_class(&uobj->mutex, key);
92 uobj->live = 0;
93 }
94
95 static void release_uobj(struct kref *kref)
96 {
97 kfree(container_of(kref, struct ib_uobject, ref));
98 }
99
100 static void put_uobj(struct ib_uobject *uobj)
101 {
102 kref_put(&uobj->ref, release_uobj);
103 }
104
105 static void put_uobj_read(struct ib_uobject *uobj)
106 {
107 up_read(&uobj->mutex);
108 put_uobj(uobj);
109 }
110
111 static void put_uobj_write(struct ib_uobject *uobj)
112 {
113 up_write(&uobj->mutex);
114 put_uobj(uobj);
115 }
116
117 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
118 {
119 int ret;
120
121 retry:
122 if (!idr_pre_get(idr, GFP_KERNEL))
123 return -ENOMEM;
124
125 spin_lock(&ib_uverbs_idr_lock);
126 ret = idr_get_new(idr, uobj, &uobj->id);
127 spin_unlock(&ib_uverbs_idr_lock);
128
129 if (ret == -EAGAIN)
130 goto retry;
131
132 return ret;
133 }
134
135 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
136 {
137 spin_lock(&ib_uverbs_idr_lock);
138 idr_remove(idr, uobj->id);
139 spin_unlock(&ib_uverbs_idr_lock);
140 }
141
142 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
143 struct ib_ucontext *context)
144 {
145 struct ib_uobject *uobj;
146
147 spin_lock(&ib_uverbs_idr_lock);
148 uobj = idr_find(idr, id);
149 if (uobj) {
150 if (uobj->context == context)
151 kref_get(&uobj->ref);
152 else
153 uobj = NULL;
154 }
155 spin_unlock(&ib_uverbs_idr_lock);
156
157 return uobj;
158 }
159
160 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
161 struct ib_ucontext *context, int nested)
162 {
163 struct ib_uobject *uobj;
164
165 uobj = __idr_get_uobj(idr, id, context);
166 if (!uobj)
167 return NULL;
168
169 if (nested)
170 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
171 else
172 down_read(&uobj->mutex);
173 if (!uobj->live) {
174 put_uobj_read(uobj);
175 return NULL;
176 }
177
178 return uobj;
179 }
180
181 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
182 struct ib_ucontext *context)
183 {
184 struct ib_uobject *uobj;
185
186 uobj = __idr_get_uobj(idr, id, context);
187 if (!uobj)
188 return NULL;
189
190 down_write(&uobj->mutex);
191 if (!uobj->live) {
192 put_uobj_write(uobj);
193 return NULL;
194 }
195
196 return uobj;
197 }
198
199 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
200 int nested)
201 {
202 struct ib_uobject *uobj;
203
204 uobj = idr_read_uobj(idr, id, context, nested);
205 return uobj ? uobj->object : NULL;
206 }
207
208 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
209 {
210 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
211 }
212
213 static void put_pd_read(struct ib_pd *pd)
214 {
215 put_uobj_read(pd->uobject);
216 }
217
218 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
219 {
220 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
221 }
222
223 static void put_cq_read(struct ib_cq *cq)
224 {
225 put_uobj_read(cq->uobject);
226 }
227
228 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
229 {
230 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
231 }
232
233 static void put_ah_read(struct ib_ah *ah)
234 {
235 put_uobj_read(ah->uobject);
236 }
237
238 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
239 {
240 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
241 }
242
243 static void put_qp_read(struct ib_qp *qp)
244 {
245 put_uobj_read(qp->uobject);
246 }
247
248 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
249 {
250 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
251 }
252
253 static void put_srq_read(struct ib_srq *srq)
254 {
255 put_uobj_read(srq->uobject);
256 }
257
258 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
259 const char __user *buf,
260 int in_len, int out_len)
261 {
262 struct ib_uverbs_get_context cmd;
263 struct ib_uverbs_get_context_resp resp;
264 struct ib_udata udata;
265 struct ib_device *ibdev = file->device->ib_dev;
266 struct ib_ucontext *ucontext;
267 struct file *filp;
268 int ret;
269
270 if (out_len < sizeof resp)
271 return -ENOSPC;
272
273 if (copy_from_user(&cmd, buf, sizeof cmd))
274 return -EFAULT;
275
276 mutex_lock(&file->mutex);
277
278 if (file->ucontext) {
279 ret = -EINVAL;
280 goto err;
281 }
282
283 INIT_UDATA(&udata, buf + sizeof cmd,
284 (unsigned long) cmd.response + sizeof resp,
285 in_len - sizeof cmd, out_len - sizeof resp);
286
287 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
288 if (IS_ERR(ucontext)) {
289 ret = PTR_ERR(ucontext);
290 goto err;
291 }
292
293 ucontext->device = ibdev;
294 INIT_LIST_HEAD(&ucontext->pd_list);
295 INIT_LIST_HEAD(&ucontext->mr_list);
296 INIT_LIST_HEAD(&ucontext->mw_list);
297 INIT_LIST_HEAD(&ucontext->cq_list);
298 INIT_LIST_HEAD(&ucontext->qp_list);
299 INIT_LIST_HEAD(&ucontext->srq_list);
300 INIT_LIST_HEAD(&ucontext->ah_list);
301 ucontext->closing = 0;
302
303 resp.num_comp_vectors = file->device->num_comp_vectors;
304
305 ret = get_unused_fd();
306 if (ret < 0)
307 goto err_free;
308 resp.async_fd = ret;
309
310 filp = ib_uverbs_alloc_event_file(file, 1);
311 if (IS_ERR(filp)) {
312 ret = PTR_ERR(filp);
313 goto err_fd;
314 }
315
316 if (copy_to_user((void __user *) (unsigned long) cmd.response,
317 &resp, sizeof resp)) {
318 ret = -EFAULT;
319 goto err_file;
320 }
321
322 file->async_file = filp->private_data;
323
324 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
325 ib_uverbs_event_handler);
326 ret = ib_register_event_handler(&file->event_handler);
327 if (ret)
328 goto err_file;
329
330 kref_get(&file->async_file->ref);
331 kref_get(&file->ref);
332 file->ucontext = ucontext;
333
334 fd_install(resp.async_fd, filp);
335
336 mutex_unlock(&file->mutex);
337
338 return in_len;
339
340 err_file:
341 fput(filp);
342
343 err_fd:
344 put_unused_fd(resp.async_fd);
345
346 err_free:
347 ibdev->dealloc_ucontext(ucontext);
348
349 err:
350 mutex_unlock(&file->mutex);
351 return ret;
352 }
353
354 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
355 const char __user *buf,
356 int in_len, int out_len)
357 {
358 struct ib_uverbs_query_device cmd;
359 struct ib_uverbs_query_device_resp resp;
360 struct ib_device_attr attr;
361 int ret;
362
363 if (out_len < sizeof resp)
364 return -ENOSPC;
365
366 if (copy_from_user(&cmd, buf, sizeof cmd))
367 return -EFAULT;
368
369 ret = ib_query_device(file->device->ib_dev, &attr);
370 if (ret)
371 return ret;
372
373 memset(&resp, 0, sizeof resp);
374
375 resp.fw_ver = attr.fw_ver;
376 resp.node_guid = file->device->ib_dev->node_guid;
377 resp.sys_image_guid = attr.sys_image_guid;
378 resp.max_mr_size = attr.max_mr_size;
379 resp.page_size_cap = attr.page_size_cap;
380 resp.vendor_id = attr.vendor_id;
381 resp.vendor_part_id = attr.vendor_part_id;
382 resp.hw_ver = attr.hw_ver;
383 resp.max_qp = attr.max_qp;
384 resp.max_qp_wr = attr.max_qp_wr;
385 resp.device_cap_flags = attr.device_cap_flags;
386 resp.max_sge = attr.max_sge;
387 resp.max_sge_rd = attr.max_sge_rd;
388 resp.max_cq = attr.max_cq;
389 resp.max_cqe = attr.max_cqe;
390 resp.max_mr = attr.max_mr;
391 resp.max_pd = attr.max_pd;
392 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
393 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
394 resp.max_res_rd_atom = attr.max_res_rd_atom;
395 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
396 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
397 resp.atomic_cap = attr.atomic_cap;
398 resp.max_ee = attr.max_ee;
399 resp.max_rdd = attr.max_rdd;
400 resp.max_mw = attr.max_mw;
401 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
402 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
403 resp.max_mcast_grp = attr.max_mcast_grp;
404 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
405 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
406 resp.max_ah = attr.max_ah;
407 resp.max_fmr = attr.max_fmr;
408 resp.max_map_per_fmr = attr.max_map_per_fmr;
409 resp.max_srq = attr.max_srq;
410 resp.max_srq_wr = attr.max_srq_wr;
411 resp.max_srq_sge = attr.max_srq_sge;
412 resp.max_pkeys = attr.max_pkeys;
413 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
414 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
415
416 if (copy_to_user((void __user *) (unsigned long) cmd.response,
417 &resp, sizeof resp))
418 return -EFAULT;
419
420 return in_len;
421 }
422
423 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
424 const char __user *buf,
425 int in_len, int out_len)
426 {
427 struct ib_uverbs_query_port cmd;
428 struct ib_uverbs_query_port_resp resp;
429 struct ib_port_attr attr;
430 int ret;
431
432 if (out_len < sizeof resp)
433 return -ENOSPC;
434
435 if (copy_from_user(&cmd, buf, sizeof cmd))
436 return -EFAULT;
437
438 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
439 if (ret)
440 return ret;
441
442 memset(&resp, 0, sizeof resp);
443
444 resp.state = attr.state;
445 resp.max_mtu = attr.max_mtu;
446 resp.active_mtu = attr.active_mtu;
447 resp.gid_tbl_len = attr.gid_tbl_len;
448 resp.port_cap_flags = attr.port_cap_flags;
449 resp.max_msg_sz = attr.max_msg_sz;
450 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
451 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
452 resp.pkey_tbl_len = attr.pkey_tbl_len;
453 resp.lid = attr.lid;
454 resp.sm_lid = attr.sm_lid;
455 resp.lmc = attr.lmc;
456 resp.max_vl_num = attr.max_vl_num;
457 resp.sm_sl = attr.sm_sl;
458 resp.subnet_timeout = attr.subnet_timeout;
459 resp.init_type_reply = attr.init_type_reply;
460 resp.active_width = attr.active_width;
461 resp.active_speed = attr.active_speed;
462 resp.phys_state = attr.phys_state;
463
464 if (copy_to_user((void __user *) (unsigned long) cmd.response,
465 &resp, sizeof resp))
466 return -EFAULT;
467
468 return in_len;
469 }
470
471 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
472 const char __user *buf,
473 int in_len, int out_len)
474 {
475 struct ib_uverbs_alloc_pd cmd;
476 struct ib_uverbs_alloc_pd_resp resp;
477 struct ib_udata udata;
478 struct ib_uobject *uobj;
479 struct ib_pd *pd;
480 int ret;
481
482 if (out_len < sizeof resp)
483 return -ENOSPC;
484
485 if (copy_from_user(&cmd, buf, sizeof cmd))
486 return -EFAULT;
487
488 INIT_UDATA(&udata, buf + sizeof cmd,
489 (unsigned long) cmd.response + sizeof resp,
490 in_len - sizeof cmd, out_len - sizeof resp);
491
492 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
493 if (!uobj)
494 return -ENOMEM;
495
496 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
497 down_write(&uobj->mutex);
498
499 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
500 file->ucontext, &udata);
501 if (IS_ERR(pd)) {
502 ret = PTR_ERR(pd);
503 goto err;
504 }
505
506 pd->device = file->device->ib_dev;
507 pd->uobject = uobj;
508 atomic_set(&pd->usecnt, 0);
509
510 uobj->object = pd;
511 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
512 if (ret)
513 goto err_idr;
514
515 memset(&resp, 0, sizeof resp);
516 resp.pd_handle = uobj->id;
517
518 if (copy_to_user((void __user *) (unsigned long) cmd.response,
519 &resp, sizeof resp)) {
520 ret = -EFAULT;
521 goto err_copy;
522 }
523
524 mutex_lock(&file->mutex);
525 list_add_tail(&uobj->list, &file->ucontext->pd_list);
526 mutex_unlock(&file->mutex);
527
528 uobj->live = 1;
529
530 up_write(&uobj->mutex);
531
532 return in_len;
533
534 err_copy:
535 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
536
537 err_idr:
538 ib_dealloc_pd(pd);
539
540 err:
541 put_uobj_write(uobj);
542 return ret;
543 }
544
545 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
546 const char __user *buf,
547 int in_len, int out_len)
548 {
549 struct ib_uverbs_dealloc_pd cmd;
550 struct ib_uobject *uobj;
551 int ret;
552
553 if (copy_from_user(&cmd, buf, sizeof cmd))
554 return -EFAULT;
555
556 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
557 if (!uobj)
558 return -EINVAL;
559
560 ret = ib_dealloc_pd(uobj->object);
561 if (!ret)
562 uobj->live = 0;
563
564 put_uobj_write(uobj);
565
566 if (ret)
567 return ret;
568
569 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
570
571 mutex_lock(&file->mutex);
572 list_del(&uobj->list);
573 mutex_unlock(&file->mutex);
574
575 put_uobj(uobj);
576
577 return in_len;
578 }
579
580 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
581 const char __user *buf, int in_len,
582 int out_len)
583 {
584 struct ib_uverbs_reg_mr cmd;
585 struct ib_uverbs_reg_mr_resp resp;
586 struct ib_udata udata;
587 struct ib_uobject *uobj;
588 struct ib_pd *pd;
589 struct ib_mr *mr;
590 int ret;
591
592 if (out_len < sizeof resp)
593 return -ENOSPC;
594
595 if (copy_from_user(&cmd, buf, sizeof cmd))
596 return -EFAULT;
597
598 INIT_UDATA(&udata, buf + sizeof cmd,
599 (unsigned long) cmd.response + sizeof resp,
600 in_len - sizeof cmd, out_len - sizeof resp);
601
602 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
603 return -EINVAL;
604
605 /*
606 * Local write permission is required if remote write or
607 * remote atomic permission is also requested.
608 */
609 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
610 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
611 return -EINVAL;
612
613 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
614 if (!uobj)
615 return -ENOMEM;
616
617 init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
618 down_write(&uobj->mutex);
619
620 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
621 if (!pd) {
622 ret = -EINVAL;
623 goto err_free;
624 }
625
626 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
627 cmd.access_flags, &udata);
628 if (IS_ERR(mr)) {
629 ret = PTR_ERR(mr);
630 goto err_put;
631 }
632
633 mr->device = pd->device;
634 mr->pd = pd;
635 mr->uobject = uobj;
636 atomic_inc(&pd->usecnt);
637 atomic_set(&mr->usecnt, 0);
638
639 uobj->object = mr;
640 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
641 if (ret)
642 goto err_unreg;
643
644 memset(&resp, 0, sizeof resp);
645 resp.lkey = mr->lkey;
646 resp.rkey = mr->rkey;
647 resp.mr_handle = uobj->id;
648
649 if (copy_to_user((void __user *) (unsigned long) cmd.response,
650 &resp, sizeof resp)) {
651 ret = -EFAULT;
652 goto err_copy;
653 }
654
655 put_pd_read(pd);
656
657 mutex_lock(&file->mutex);
658 list_add_tail(&uobj->list, &file->ucontext->mr_list);
659 mutex_unlock(&file->mutex);
660
661 uobj->live = 1;
662
663 up_write(&uobj->mutex);
664
665 return in_len;
666
667 err_copy:
668 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
669
670 err_unreg:
671 ib_dereg_mr(mr);
672
673 err_put:
674 put_pd_read(pd);
675
676 err_free:
677 put_uobj_write(uobj);
678 return ret;
679 }
680
681 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
682 const char __user *buf, int in_len,
683 int out_len)
684 {
685 struct ib_uverbs_dereg_mr cmd;
686 struct ib_mr *mr;
687 struct ib_uobject *uobj;
688 int ret = -EINVAL;
689
690 if (copy_from_user(&cmd, buf, sizeof cmd))
691 return -EFAULT;
692
693 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
694 if (!uobj)
695 return -EINVAL;
696
697 mr = uobj->object;
698
699 ret = ib_dereg_mr(mr);
700 if (!ret)
701 uobj->live = 0;
702
703 put_uobj_write(uobj);
704
705 if (ret)
706 return ret;
707
708 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
709
710 mutex_lock(&file->mutex);
711 list_del(&uobj->list);
712 mutex_unlock(&file->mutex);
713
714 put_uobj(uobj);
715
716 return in_len;
717 }
718
719 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
720 const char __user *buf, int in_len,
721 int out_len)
722 {
723 struct ib_uverbs_create_comp_channel cmd;
724 struct ib_uverbs_create_comp_channel_resp resp;
725 struct file *filp;
726 int ret;
727
728 if (out_len < sizeof resp)
729 return -ENOSPC;
730
731 if (copy_from_user(&cmd, buf, sizeof cmd))
732 return -EFAULT;
733
734 ret = get_unused_fd();
735 if (ret < 0)
736 return ret;
737 resp.fd = ret;
738
739 filp = ib_uverbs_alloc_event_file(file, 0);
740 if (IS_ERR(filp)) {
741 put_unused_fd(resp.fd);
742 return PTR_ERR(filp);
743 }
744
745 if (copy_to_user((void __user *) (unsigned long) cmd.response,
746 &resp, sizeof resp)) {
747 put_unused_fd(resp.fd);
748 fput(filp);
749 return -EFAULT;
750 }
751
752 fd_install(resp.fd, filp);
753 return in_len;
754 }
755
756 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
757 const char __user *buf, int in_len,
758 int out_len)
759 {
760 struct ib_uverbs_create_cq cmd;
761 struct ib_uverbs_create_cq_resp resp;
762 struct ib_udata udata;
763 struct ib_ucq_object *obj;
764 struct ib_uverbs_event_file *ev_file = NULL;
765 struct ib_cq *cq;
766 int ret;
767
768 if (out_len < sizeof resp)
769 return -ENOSPC;
770
771 if (copy_from_user(&cmd, buf, sizeof cmd))
772 return -EFAULT;
773
774 INIT_UDATA(&udata, buf + sizeof cmd,
775 (unsigned long) cmd.response + sizeof resp,
776 in_len - sizeof cmd, out_len - sizeof resp);
777
778 if (cmd.comp_vector >= file->device->num_comp_vectors)
779 return -EINVAL;
780
781 obj = kmalloc(sizeof *obj, GFP_KERNEL);
782 if (!obj)
783 return -ENOMEM;
784
785 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
786 down_write(&obj->uobject.mutex);
787
788 if (cmd.comp_channel >= 0) {
789 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
790 if (!ev_file) {
791 ret = -EINVAL;
792 goto err;
793 }
794 }
795
796 obj->uverbs_file = file;
797 obj->comp_events_reported = 0;
798 obj->async_events_reported = 0;
799 INIT_LIST_HEAD(&obj->comp_list);
800 INIT_LIST_HEAD(&obj->async_list);
801
802 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
803 cmd.comp_vector,
804 file->ucontext, &udata);
805 if (IS_ERR(cq)) {
806 ret = PTR_ERR(cq);
807 goto err_file;
808 }
809
810 cq->device = file->device->ib_dev;
811 cq->uobject = &obj->uobject;
812 cq->comp_handler = ib_uverbs_comp_handler;
813 cq->event_handler = ib_uverbs_cq_event_handler;
814 cq->cq_context = ev_file;
815 atomic_set(&cq->usecnt, 0);
816
817 obj->uobject.object = cq;
818 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
819 if (ret)
820 goto err_free;
821
822 memset(&resp, 0, sizeof resp);
823 resp.cq_handle = obj->uobject.id;
824 resp.cqe = cq->cqe;
825
826 if (copy_to_user((void __user *) (unsigned long) cmd.response,
827 &resp, sizeof resp)) {
828 ret = -EFAULT;
829 goto err_copy;
830 }
831
832 mutex_lock(&file->mutex);
833 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
834 mutex_unlock(&file->mutex);
835
836 obj->uobject.live = 1;
837
838 up_write(&obj->uobject.mutex);
839
840 return in_len;
841
842 err_copy:
843 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
844
845 err_free:
846 ib_destroy_cq(cq);
847
848 err_file:
849 if (ev_file)
850 ib_uverbs_release_ucq(file, ev_file, obj);
851
852 err:
853 put_uobj_write(&obj->uobject);
854 return ret;
855 }
856
857 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
858 const char __user *buf, int in_len,
859 int out_len)
860 {
861 struct ib_uverbs_resize_cq cmd;
862 struct ib_uverbs_resize_cq_resp resp;
863 struct ib_udata udata;
864 struct ib_cq *cq;
865 int ret = -EINVAL;
866
867 if (copy_from_user(&cmd, buf, sizeof cmd))
868 return -EFAULT;
869
870 INIT_UDATA(&udata, buf + sizeof cmd,
871 (unsigned long) cmd.response + sizeof resp,
872 in_len - sizeof cmd, out_len - sizeof resp);
873
874 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
875 if (!cq)
876 return -EINVAL;
877
878 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
879 if (ret)
880 goto out;
881
882 resp.cqe = cq->cqe;
883
884 if (copy_to_user((void __user *) (unsigned long) cmd.response,
885 &resp, sizeof resp.cqe))
886 ret = -EFAULT;
887
888 out:
889 put_cq_read(cq);
890
891 return ret ? ret : in_len;
892 }
893
894 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
895 const char __user *buf, int in_len,
896 int out_len)
897 {
898 struct ib_uverbs_poll_cq cmd;
899 struct ib_uverbs_poll_cq_resp *resp;
900 struct ib_cq *cq;
901 struct ib_wc *wc;
902 int ret = 0;
903 int i;
904 int rsize;
905
906 if (copy_from_user(&cmd, buf, sizeof cmd))
907 return -EFAULT;
908
909 wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
910 if (!wc)
911 return -ENOMEM;
912
913 rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
914 resp = kmalloc(rsize, GFP_KERNEL);
915 if (!resp) {
916 ret = -ENOMEM;
917 goto out_wc;
918 }
919
920 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
921 if (!cq) {
922 ret = -EINVAL;
923 goto out;
924 }
925
926 resp->count = ib_poll_cq(cq, cmd.ne, wc);
927
928 put_cq_read(cq);
929
930 for (i = 0; i < resp->count; i++) {
931 resp->wc[i].wr_id = wc[i].wr_id;
932 resp->wc[i].status = wc[i].status;
933 resp->wc[i].opcode = wc[i].opcode;
934 resp->wc[i].vendor_err = wc[i].vendor_err;
935 resp->wc[i].byte_len = wc[i].byte_len;
936 resp->wc[i].ex.imm_data = (__u32 __force) wc[i].ex.imm_data;
937 resp->wc[i].qp_num = wc[i].qp->qp_num;
938 resp->wc[i].src_qp = wc[i].src_qp;
939 resp->wc[i].wc_flags = wc[i].wc_flags;
940 resp->wc[i].pkey_index = wc[i].pkey_index;
941 resp->wc[i].slid = wc[i].slid;
942 resp->wc[i].sl = wc[i].sl;
943 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
944 resp->wc[i].port_num = wc[i].port_num;
945 }
946
947 if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
948 ret = -EFAULT;
949
950 out:
951 kfree(resp);
952
953 out_wc:
954 kfree(wc);
955 return ret ? ret : in_len;
956 }
957
958 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
959 const char __user *buf, int in_len,
960 int out_len)
961 {
962 struct ib_uverbs_req_notify_cq cmd;
963 struct ib_cq *cq;
964
965 if (copy_from_user(&cmd, buf, sizeof cmd))
966 return -EFAULT;
967
968 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
969 if (!cq)
970 return -EINVAL;
971
972 ib_req_notify_cq(cq, cmd.solicited_only ?
973 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
974
975 put_cq_read(cq);
976
977 return in_len;
978 }
979
980 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
981 const char __user *buf, int in_len,
982 int out_len)
983 {
984 struct ib_uverbs_destroy_cq cmd;
985 struct ib_uverbs_destroy_cq_resp resp;
986 struct ib_uobject *uobj;
987 struct ib_cq *cq;
988 struct ib_ucq_object *obj;
989 struct ib_uverbs_event_file *ev_file;
990 int ret = -EINVAL;
991
992 if (copy_from_user(&cmd, buf, sizeof cmd))
993 return -EFAULT;
994
995 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
996 if (!uobj)
997 return -EINVAL;
998 cq = uobj->object;
999 ev_file = cq->cq_context;
1000 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1001
1002 ret = ib_destroy_cq(cq);
1003 if (!ret)
1004 uobj->live = 0;
1005
1006 put_uobj_write(uobj);
1007
1008 if (ret)
1009 return ret;
1010
1011 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1012
1013 mutex_lock(&file->mutex);
1014 list_del(&uobj->list);
1015 mutex_unlock(&file->mutex);
1016
1017 ib_uverbs_release_ucq(file, ev_file, obj);
1018
1019 memset(&resp, 0, sizeof resp);
1020 resp.comp_events_reported = obj->comp_events_reported;
1021 resp.async_events_reported = obj->async_events_reported;
1022
1023 put_uobj(uobj);
1024
1025 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1026 &resp, sizeof resp))
1027 return -EFAULT;
1028
1029 return in_len;
1030 }
1031
1032 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1033 const char __user *buf, int in_len,
1034 int out_len)
1035 {
1036 struct ib_uverbs_create_qp cmd;
1037 struct ib_uverbs_create_qp_resp resp;
1038 struct ib_udata udata;
1039 struct ib_uqp_object *obj;
1040 struct ib_pd *pd;
1041 struct ib_cq *scq, *rcq;
1042 struct ib_srq *srq;
1043 struct ib_qp *qp;
1044 struct ib_qp_init_attr attr;
1045 int ret;
1046
1047 if (out_len < sizeof resp)
1048 return -ENOSPC;
1049
1050 if (copy_from_user(&cmd, buf, sizeof cmd))
1051 return -EFAULT;
1052
1053 INIT_UDATA(&udata, buf + sizeof cmd,
1054 (unsigned long) cmd.response + sizeof resp,
1055 in_len - sizeof cmd, out_len - sizeof resp);
1056
1057 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1058 if (!obj)
1059 return -ENOMEM;
1060
1061 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1062 down_write(&obj->uevent.uobject.mutex);
1063
1064 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1065 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1066 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1067 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1068 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1069
1070 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1071 ret = -EINVAL;
1072 goto err_put;
1073 }
1074
1075 attr.event_handler = ib_uverbs_qp_event_handler;
1076 attr.qp_context = file;
1077 attr.send_cq = scq;
1078 attr.recv_cq = rcq;
1079 attr.srq = srq;
1080 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1081 attr.qp_type = cmd.qp_type;
1082 attr.create_flags = 0;
1083
1084 attr.cap.max_send_wr = cmd.max_send_wr;
1085 attr.cap.max_recv_wr = cmd.max_recv_wr;
1086 attr.cap.max_send_sge = cmd.max_send_sge;
1087 attr.cap.max_recv_sge = cmd.max_recv_sge;
1088 attr.cap.max_inline_data = cmd.max_inline_data;
1089
1090 obj->uevent.events_reported = 0;
1091 INIT_LIST_HEAD(&obj->uevent.event_list);
1092 INIT_LIST_HEAD(&obj->mcast_list);
1093
1094 qp = pd->device->create_qp(pd, &attr, &udata);
1095 if (IS_ERR(qp)) {
1096 ret = PTR_ERR(qp);
1097 goto err_put;
1098 }
1099
1100 qp->device = pd->device;
1101 qp->pd = pd;
1102 qp->send_cq = attr.send_cq;
1103 qp->recv_cq = attr.recv_cq;
1104 qp->srq = attr.srq;
1105 qp->uobject = &obj->uevent.uobject;
1106 qp->event_handler = attr.event_handler;
1107 qp->qp_context = attr.qp_context;
1108 qp->qp_type = attr.qp_type;
1109 atomic_inc(&pd->usecnt);
1110 atomic_inc(&attr.send_cq->usecnt);
1111 atomic_inc(&attr.recv_cq->usecnt);
1112 if (attr.srq)
1113 atomic_inc(&attr.srq->usecnt);
1114
1115 obj->uevent.uobject.object = qp;
1116 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1117 if (ret)
1118 goto err_destroy;
1119
1120 memset(&resp, 0, sizeof resp);
1121 resp.qpn = qp->qp_num;
1122 resp.qp_handle = obj->uevent.uobject.id;
1123 resp.max_recv_sge = attr.cap.max_recv_sge;
1124 resp.max_send_sge = attr.cap.max_send_sge;
1125 resp.max_recv_wr = attr.cap.max_recv_wr;
1126 resp.max_send_wr = attr.cap.max_send_wr;
1127 resp.max_inline_data = attr.cap.max_inline_data;
1128
1129 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1130 &resp, sizeof resp)) {
1131 ret = -EFAULT;
1132 goto err_copy;
1133 }
1134
1135 put_pd_read(pd);
1136 put_cq_read(scq);
1137 if (rcq != scq)
1138 put_cq_read(rcq);
1139 if (srq)
1140 put_srq_read(srq);
1141
1142 mutex_lock(&file->mutex);
1143 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1144 mutex_unlock(&file->mutex);
1145
1146 obj->uevent.uobject.live = 1;
1147
1148 up_write(&obj->uevent.uobject.mutex);
1149
1150 return in_len;
1151
1152 err_copy:
1153 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1154
1155 err_destroy:
1156 ib_destroy_qp(qp);
1157
1158 err_put:
1159 if (pd)
1160 put_pd_read(pd);
1161 if (scq)
1162 put_cq_read(scq);
1163 if (rcq && rcq != scq)
1164 put_cq_read(rcq);
1165 if (srq)
1166 put_srq_read(srq);
1167
1168 put_uobj_write(&obj->uevent.uobject);
1169 return ret;
1170 }
1171
1172 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1173 const char __user *buf, int in_len,
1174 int out_len)
1175 {
1176 struct ib_uverbs_query_qp cmd;
1177 struct ib_uverbs_query_qp_resp resp;
1178 struct ib_qp *qp;
1179 struct ib_qp_attr *attr;
1180 struct ib_qp_init_attr *init_attr;
1181 int ret;
1182
1183 if (copy_from_user(&cmd, buf, sizeof cmd))
1184 return -EFAULT;
1185
1186 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1187 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1188 if (!attr || !init_attr) {
1189 ret = -ENOMEM;
1190 goto out;
1191 }
1192
1193 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1194 if (!qp) {
1195 ret = -EINVAL;
1196 goto out;
1197 }
1198
1199 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1200
1201 put_qp_read(qp);
1202
1203 if (ret)
1204 goto out;
1205
1206 memset(&resp, 0, sizeof resp);
1207
1208 resp.qp_state = attr->qp_state;
1209 resp.cur_qp_state = attr->cur_qp_state;
1210 resp.path_mtu = attr->path_mtu;
1211 resp.path_mig_state = attr->path_mig_state;
1212 resp.qkey = attr->qkey;
1213 resp.rq_psn = attr->rq_psn;
1214 resp.sq_psn = attr->sq_psn;
1215 resp.dest_qp_num = attr->dest_qp_num;
1216 resp.qp_access_flags = attr->qp_access_flags;
1217 resp.pkey_index = attr->pkey_index;
1218 resp.alt_pkey_index = attr->alt_pkey_index;
1219 resp.sq_draining = attr->sq_draining;
1220 resp.max_rd_atomic = attr->max_rd_atomic;
1221 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1222 resp.min_rnr_timer = attr->min_rnr_timer;
1223 resp.port_num = attr->port_num;
1224 resp.timeout = attr->timeout;
1225 resp.retry_cnt = attr->retry_cnt;
1226 resp.rnr_retry = attr->rnr_retry;
1227 resp.alt_port_num = attr->alt_port_num;
1228 resp.alt_timeout = attr->alt_timeout;
1229
1230 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1231 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1232 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1233 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1234 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1235 resp.dest.dlid = attr->ah_attr.dlid;
1236 resp.dest.sl = attr->ah_attr.sl;
1237 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1238 resp.dest.static_rate = attr->ah_attr.static_rate;
1239 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1240 resp.dest.port_num = attr->ah_attr.port_num;
1241
1242 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1243 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1244 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1245 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1246 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1247 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1248 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1249 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1250 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1251 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1252 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1253
1254 resp.max_send_wr = init_attr->cap.max_send_wr;
1255 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1256 resp.max_send_sge = init_attr->cap.max_send_sge;
1257 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1258 resp.max_inline_data = init_attr->cap.max_inline_data;
1259 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1260
1261 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1262 &resp, sizeof resp))
1263 ret = -EFAULT;
1264
1265 out:
1266 kfree(attr);
1267 kfree(init_attr);
1268
1269 return ret ? ret : in_len;
1270 }
1271
1272 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1273 const char __user *buf, int in_len,
1274 int out_len)
1275 {
1276 struct ib_uverbs_modify_qp cmd;
1277 struct ib_udata udata;
1278 struct ib_qp *qp;
1279 struct ib_qp_attr *attr;
1280 int ret;
1281
1282 if (copy_from_user(&cmd, buf, sizeof cmd))
1283 return -EFAULT;
1284
1285 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1286 out_len);
1287
1288 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1289 if (!attr)
1290 return -ENOMEM;
1291
1292 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1293 if (!qp) {
1294 ret = -EINVAL;
1295 goto out;
1296 }
1297
1298 attr->qp_state = cmd.qp_state;
1299 attr->cur_qp_state = cmd.cur_qp_state;
1300 attr->path_mtu = cmd.path_mtu;
1301 attr->path_mig_state = cmd.path_mig_state;
1302 attr->qkey = cmd.qkey;
1303 attr->rq_psn = cmd.rq_psn;
1304 attr->sq_psn = cmd.sq_psn;
1305 attr->dest_qp_num = cmd.dest_qp_num;
1306 attr->qp_access_flags = cmd.qp_access_flags;
1307 attr->pkey_index = cmd.pkey_index;
1308 attr->alt_pkey_index = cmd.alt_pkey_index;
1309 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1310 attr->max_rd_atomic = cmd.max_rd_atomic;
1311 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1312 attr->min_rnr_timer = cmd.min_rnr_timer;
1313 attr->port_num = cmd.port_num;
1314 attr->timeout = cmd.timeout;
1315 attr->retry_cnt = cmd.retry_cnt;
1316 attr->rnr_retry = cmd.rnr_retry;
1317 attr->alt_port_num = cmd.alt_port_num;
1318 attr->alt_timeout = cmd.alt_timeout;
1319
1320 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1321 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1322 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1323 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1324 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1325 attr->ah_attr.dlid = cmd.dest.dlid;
1326 attr->ah_attr.sl = cmd.dest.sl;
1327 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1328 attr->ah_attr.static_rate = cmd.dest.static_rate;
1329 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1330 attr->ah_attr.port_num = cmd.dest.port_num;
1331
1332 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1333 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1334 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1335 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1336 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1337 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1338 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1339 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1340 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1341 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1342 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1343
1344 ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1345
1346 put_qp_read(qp);
1347
1348 if (ret)
1349 goto out;
1350
1351 ret = in_len;
1352
1353 out:
1354 kfree(attr);
1355
1356 return ret;
1357 }
1358
1359 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1360 const char __user *buf, int in_len,
1361 int out_len)
1362 {
1363 struct ib_uverbs_destroy_qp cmd;
1364 struct ib_uverbs_destroy_qp_resp resp;
1365 struct ib_uobject *uobj;
1366 struct ib_qp *qp;
1367 struct ib_uqp_object *obj;
1368 int ret = -EINVAL;
1369
1370 if (copy_from_user(&cmd, buf, sizeof cmd))
1371 return -EFAULT;
1372
1373 memset(&resp, 0, sizeof resp);
1374
1375 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1376 if (!uobj)
1377 return -EINVAL;
1378 qp = uobj->object;
1379 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1380
1381 if (!list_empty(&obj->mcast_list)) {
1382 put_uobj_write(uobj);
1383 return -EBUSY;
1384 }
1385
1386 ret = ib_destroy_qp(qp);
1387 if (!ret)
1388 uobj->live = 0;
1389
1390 put_uobj_write(uobj);
1391
1392 if (ret)
1393 return ret;
1394
1395 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1396
1397 mutex_lock(&file->mutex);
1398 list_del(&uobj->list);
1399 mutex_unlock(&file->mutex);
1400
1401 ib_uverbs_release_uevent(file, &obj->uevent);
1402
1403 resp.events_reported = obj->uevent.events_reported;
1404
1405 put_uobj(uobj);
1406
1407 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1408 &resp, sizeof resp))
1409 return -EFAULT;
1410
1411 return in_len;
1412 }
1413
1414 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1415 const char __user *buf, int in_len,
1416 int out_len)
1417 {
1418 struct ib_uverbs_post_send cmd;
1419 struct ib_uverbs_post_send_resp resp;
1420 struct ib_uverbs_send_wr *user_wr;
1421 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1422 struct ib_qp *qp;
1423 int i, sg_ind;
1424 int is_ud;
1425 ssize_t ret = -EINVAL;
1426
1427 if (copy_from_user(&cmd, buf, sizeof cmd))
1428 return -EFAULT;
1429
1430 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1431 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1432 return -EINVAL;
1433
1434 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1435 return -EINVAL;
1436
1437 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1438 if (!user_wr)
1439 return -ENOMEM;
1440
1441 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1442 if (!qp)
1443 goto out;
1444
1445 is_ud = qp->qp_type == IB_QPT_UD;
1446 sg_ind = 0;
1447 last = NULL;
1448 for (i = 0; i < cmd.wr_count; ++i) {
1449 if (copy_from_user(user_wr,
1450 buf + sizeof cmd + i * cmd.wqe_size,
1451 cmd.wqe_size)) {
1452 ret = -EFAULT;
1453 goto out_put;
1454 }
1455
1456 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1457 ret = -EINVAL;
1458 goto out_put;
1459 }
1460
1461 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1462 user_wr->num_sge * sizeof (struct ib_sge),
1463 GFP_KERNEL);
1464 if (!next) {
1465 ret = -ENOMEM;
1466 goto out_put;
1467 }
1468
1469 if (!last)
1470 wr = next;
1471 else
1472 last->next = next;
1473 last = next;
1474
1475 next->next = NULL;
1476 next->wr_id = user_wr->wr_id;
1477 next->num_sge = user_wr->num_sge;
1478 next->opcode = user_wr->opcode;
1479 next->send_flags = user_wr->send_flags;
1480
1481 if (is_ud) {
1482 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1483 file->ucontext);
1484 if (!next->wr.ud.ah) {
1485 ret = -EINVAL;
1486 goto out_put;
1487 }
1488 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1489 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1490 } else {
1491 switch (next->opcode) {
1492 case IB_WR_RDMA_WRITE_WITH_IMM:
1493 next->ex.imm_data =
1494 (__be32 __force) user_wr->ex.imm_data;
1495 case IB_WR_RDMA_WRITE:
1496 case IB_WR_RDMA_READ:
1497 next->wr.rdma.remote_addr =
1498 user_wr->wr.rdma.remote_addr;
1499 next->wr.rdma.rkey =
1500 user_wr->wr.rdma.rkey;
1501 break;
1502 case IB_WR_SEND_WITH_IMM:
1503 next->ex.imm_data =
1504 (__be32 __force) user_wr->ex.imm_data;
1505 break;
1506 case IB_WR_SEND_WITH_INV:
1507 next->ex.invalidate_rkey =
1508 user_wr->ex.invalidate_rkey;
1509 break;
1510 case IB_WR_ATOMIC_CMP_AND_SWP:
1511 case IB_WR_ATOMIC_FETCH_AND_ADD:
1512 next->wr.atomic.remote_addr =
1513 user_wr->wr.atomic.remote_addr;
1514 next->wr.atomic.compare_add =
1515 user_wr->wr.atomic.compare_add;
1516 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1517 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1518 break;
1519 default:
1520 break;
1521 }
1522 }
1523
1524 if (next->num_sge) {
1525 next->sg_list = (void *) next +
1526 ALIGN(sizeof *next, sizeof (struct ib_sge));
1527 if (copy_from_user(next->sg_list,
1528 buf + sizeof cmd +
1529 cmd.wr_count * cmd.wqe_size +
1530 sg_ind * sizeof (struct ib_sge),
1531 next->num_sge * sizeof (struct ib_sge))) {
1532 ret = -EFAULT;
1533 goto out_put;
1534 }
1535 sg_ind += next->num_sge;
1536 } else
1537 next->sg_list = NULL;
1538 }
1539
1540 resp.bad_wr = 0;
1541 ret = qp->device->post_send(qp, wr, &bad_wr);
1542 if (ret)
1543 for (next = wr; next; next = next->next) {
1544 ++resp.bad_wr;
1545 if (next == bad_wr)
1546 break;
1547 }
1548
1549 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1550 &resp, sizeof resp))
1551 ret = -EFAULT;
1552
1553 out_put:
1554 put_qp_read(qp);
1555
1556 while (wr) {
1557 if (is_ud && wr->wr.ud.ah)
1558 put_ah_read(wr->wr.ud.ah);
1559 next = wr->next;
1560 kfree(wr);
1561 wr = next;
1562 }
1563
1564 out:
1565 kfree(user_wr);
1566
1567 return ret ? ret : in_len;
1568 }
1569
1570 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1571 int in_len,
1572 u32 wr_count,
1573 u32 sge_count,
1574 u32 wqe_size)
1575 {
1576 struct ib_uverbs_recv_wr *user_wr;
1577 struct ib_recv_wr *wr = NULL, *last, *next;
1578 int sg_ind;
1579 int i;
1580 int ret;
1581
1582 if (in_len < wqe_size * wr_count +
1583 sge_count * sizeof (struct ib_uverbs_sge))
1584 return ERR_PTR(-EINVAL);
1585
1586 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1587 return ERR_PTR(-EINVAL);
1588
1589 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1590 if (!user_wr)
1591 return ERR_PTR(-ENOMEM);
1592
1593 sg_ind = 0;
1594 last = NULL;
1595 for (i = 0; i < wr_count; ++i) {
1596 if (copy_from_user(user_wr, buf + i * wqe_size,
1597 wqe_size)) {
1598 ret = -EFAULT;
1599 goto err;
1600 }
1601
1602 if (user_wr->num_sge + sg_ind > sge_count) {
1603 ret = -EINVAL;
1604 goto err;
1605 }
1606
1607 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1608 user_wr->num_sge * sizeof (struct ib_sge),
1609 GFP_KERNEL);
1610 if (!next) {
1611 ret = -ENOMEM;
1612 goto err;
1613 }
1614
1615 if (!last)
1616 wr = next;
1617 else
1618 last->next = next;
1619 last = next;
1620
1621 next->next = NULL;
1622 next->wr_id = user_wr->wr_id;
1623 next->num_sge = user_wr->num_sge;
1624
1625 if (next->num_sge) {
1626 next->sg_list = (void *) next +
1627 ALIGN(sizeof *next, sizeof (struct ib_sge));
1628 if (copy_from_user(next->sg_list,
1629 buf + wr_count * wqe_size +
1630 sg_ind * sizeof (struct ib_sge),
1631 next->num_sge * sizeof (struct ib_sge))) {
1632 ret = -EFAULT;
1633 goto err;
1634 }
1635 sg_ind += next->num_sge;
1636 } else
1637 next->sg_list = NULL;
1638 }
1639
1640 kfree(user_wr);
1641 return wr;
1642
1643 err:
1644 kfree(user_wr);
1645
1646 while (wr) {
1647 next = wr->next;
1648 kfree(wr);
1649 wr = next;
1650 }
1651
1652 return ERR_PTR(ret);
1653 }
1654
1655 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1656 const char __user *buf, int in_len,
1657 int out_len)
1658 {
1659 struct ib_uverbs_post_recv cmd;
1660 struct ib_uverbs_post_recv_resp resp;
1661 struct ib_recv_wr *wr, *next, *bad_wr;
1662 struct ib_qp *qp;
1663 ssize_t ret = -EINVAL;
1664
1665 if (copy_from_user(&cmd, buf, sizeof cmd))
1666 return -EFAULT;
1667
1668 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1669 in_len - sizeof cmd, cmd.wr_count,
1670 cmd.sge_count, cmd.wqe_size);
1671 if (IS_ERR(wr))
1672 return PTR_ERR(wr);
1673
1674 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1675 if (!qp)
1676 goto out;
1677
1678 resp.bad_wr = 0;
1679 ret = qp->device->post_recv(qp, wr, &bad_wr);
1680
1681 put_qp_read(qp);
1682
1683 if (ret)
1684 for (next = wr; next; next = next->next) {
1685 ++resp.bad_wr;
1686 if (next == bad_wr)
1687 break;
1688 }
1689
1690 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1691 &resp, sizeof resp))
1692 ret = -EFAULT;
1693
1694 out:
1695 while (wr) {
1696 next = wr->next;
1697 kfree(wr);
1698 wr = next;
1699 }
1700
1701 return ret ? ret : in_len;
1702 }
1703
1704 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1705 const char __user *buf, int in_len,
1706 int out_len)
1707 {
1708 struct ib_uverbs_post_srq_recv cmd;
1709 struct ib_uverbs_post_srq_recv_resp resp;
1710 struct ib_recv_wr *wr, *next, *bad_wr;
1711 struct ib_srq *srq;
1712 ssize_t ret = -EINVAL;
1713
1714 if (copy_from_user(&cmd, buf, sizeof cmd))
1715 return -EFAULT;
1716
1717 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1718 in_len - sizeof cmd, cmd.wr_count,
1719 cmd.sge_count, cmd.wqe_size);
1720 if (IS_ERR(wr))
1721 return PTR_ERR(wr);
1722
1723 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1724 if (!srq)
1725 goto out;
1726
1727 resp.bad_wr = 0;
1728 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1729
1730 put_srq_read(srq);
1731
1732 if (ret)
1733 for (next = wr; next; next = next->next) {
1734 ++resp.bad_wr;
1735 if (next == bad_wr)
1736 break;
1737 }
1738
1739 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1740 &resp, sizeof resp))
1741 ret = -EFAULT;
1742
1743 out:
1744 while (wr) {
1745 next = wr->next;
1746 kfree(wr);
1747 wr = next;
1748 }
1749
1750 return ret ? ret : in_len;
1751 }
1752
1753 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1754 const char __user *buf, int in_len,
1755 int out_len)
1756 {
1757 struct ib_uverbs_create_ah cmd;
1758 struct ib_uverbs_create_ah_resp resp;
1759 struct ib_uobject *uobj;
1760 struct ib_pd *pd;
1761 struct ib_ah *ah;
1762 struct ib_ah_attr attr;
1763 int ret;
1764
1765 if (out_len < sizeof resp)
1766 return -ENOSPC;
1767
1768 if (copy_from_user(&cmd, buf, sizeof cmd))
1769 return -EFAULT;
1770
1771 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1772 if (!uobj)
1773 return -ENOMEM;
1774
1775 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1776 down_write(&uobj->mutex);
1777
1778 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1779 if (!pd) {
1780 ret = -EINVAL;
1781 goto err;
1782 }
1783
1784 attr.dlid = cmd.attr.dlid;
1785 attr.sl = cmd.attr.sl;
1786 attr.src_path_bits = cmd.attr.src_path_bits;
1787 attr.static_rate = cmd.attr.static_rate;
1788 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
1789 attr.port_num = cmd.attr.port_num;
1790 attr.grh.flow_label = cmd.attr.grh.flow_label;
1791 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1792 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1793 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1794 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1795
1796 ah = ib_create_ah(pd, &attr);
1797 if (IS_ERR(ah)) {
1798 ret = PTR_ERR(ah);
1799 goto err_put;
1800 }
1801
1802 ah->uobject = uobj;
1803 uobj->object = ah;
1804
1805 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1806 if (ret)
1807 goto err_destroy;
1808
1809 resp.ah_handle = uobj->id;
1810
1811 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1812 &resp, sizeof resp)) {
1813 ret = -EFAULT;
1814 goto err_copy;
1815 }
1816
1817 put_pd_read(pd);
1818
1819 mutex_lock(&file->mutex);
1820 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1821 mutex_unlock(&file->mutex);
1822
1823 uobj->live = 1;
1824
1825 up_write(&uobj->mutex);
1826
1827 return in_len;
1828
1829 err_copy:
1830 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1831
1832 err_destroy:
1833 ib_destroy_ah(ah);
1834
1835 err_put:
1836 put_pd_read(pd);
1837
1838 err:
1839 put_uobj_write(uobj);
1840 return ret;
1841 }
1842
1843 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1844 const char __user *buf, int in_len, int out_len)
1845 {
1846 struct ib_uverbs_destroy_ah cmd;
1847 struct ib_ah *ah;
1848 struct ib_uobject *uobj;
1849 int ret;
1850
1851 if (copy_from_user(&cmd, buf, sizeof cmd))
1852 return -EFAULT;
1853
1854 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1855 if (!uobj)
1856 return -EINVAL;
1857 ah = uobj->object;
1858
1859 ret = ib_destroy_ah(ah);
1860 if (!ret)
1861 uobj->live = 0;
1862
1863 put_uobj_write(uobj);
1864
1865 if (ret)
1866 return ret;
1867
1868 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1869
1870 mutex_lock(&file->mutex);
1871 list_del(&uobj->list);
1872 mutex_unlock(&file->mutex);
1873
1874 put_uobj(uobj);
1875
1876 return in_len;
1877 }
1878
1879 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1880 const char __user *buf, int in_len,
1881 int out_len)
1882 {
1883 struct ib_uverbs_attach_mcast cmd;
1884 struct ib_qp *qp;
1885 struct ib_uqp_object *obj;
1886 struct ib_uverbs_mcast_entry *mcast;
1887 int ret;
1888
1889 if (copy_from_user(&cmd, buf, sizeof cmd))
1890 return -EFAULT;
1891
1892 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1893 if (!qp)
1894 return -EINVAL;
1895
1896 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1897
1898 list_for_each_entry(mcast, &obj->mcast_list, list)
1899 if (cmd.mlid == mcast->lid &&
1900 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1901 ret = 0;
1902 goto out_put;
1903 }
1904
1905 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1906 if (!mcast) {
1907 ret = -ENOMEM;
1908 goto out_put;
1909 }
1910
1911 mcast->lid = cmd.mlid;
1912 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1913
1914 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1915 if (!ret)
1916 list_add_tail(&mcast->list, &obj->mcast_list);
1917 else
1918 kfree(mcast);
1919
1920 out_put:
1921 put_qp_read(qp);
1922
1923 return ret ? ret : in_len;
1924 }
1925
1926 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1927 const char __user *buf, int in_len,
1928 int out_len)
1929 {
1930 struct ib_uverbs_detach_mcast cmd;
1931 struct ib_uqp_object *obj;
1932 struct ib_qp *qp;
1933 struct ib_uverbs_mcast_entry *mcast;
1934 int ret = -EINVAL;
1935
1936 if (copy_from_user(&cmd, buf, sizeof cmd))
1937 return -EFAULT;
1938
1939 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1940 if (!qp)
1941 return -EINVAL;
1942
1943 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1944 if (ret)
1945 goto out_put;
1946
1947 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1948
1949 list_for_each_entry(mcast, &obj->mcast_list, list)
1950 if (cmd.mlid == mcast->lid &&
1951 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1952 list_del(&mcast->list);
1953 kfree(mcast);
1954 break;
1955 }
1956
1957 out_put:
1958 put_qp_read(qp);
1959
1960 return ret ? ret : in_len;
1961 }
1962
1963 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1964 const char __user *buf, int in_len,
1965 int out_len)
1966 {
1967 struct ib_uverbs_create_srq cmd;
1968 struct ib_uverbs_create_srq_resp resp;
1969 struct ib_udata udata;
1970 struct ib_uevent_object *obj;
1971 struct ib_pd *pd;
1972 struct ib_srq *srq;
1973 struct ib_srq_init_attr attr;
1974 int ret;
1975
1976 if (out_len < sizeof resp)
1977 return -ENOSPC;
1978
1979 if (copy_from_user(&cmd, buf, sizeof cmd))
1980 return -EFAULT;
1981
1982 INIT_UDATA(&udata, buf + sizeof cmd,
1983 (unsigned long) cmd.response + sizeof resp,
1984 in_len - sizeof cmd, out_len - sizeof resp);
1985
1986 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1987 if (!obj)
1988 return -ENOMEM;
1989
1990 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1991 down_write(&obj->uobject.mutex);
1992
1993 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1994 if (!pd) {
1995 ret = -EINVAL;
1996 goto err;
1997 }
1998
1999 attr.event_handler = ib_uverbs_srq_event_handler;
2000 attr.srq_context = file;
2001 attr.attr.max_wr = cmd.max_wr;
2002 attr.attr.max_sge = cmd.max_sge;
2003 attr.attr.srq_limit = cmd.srq_limit;
2004
2005 obj->events_reported = 0;
2006 INIT_LIST_HEAD(&obj->event_list);
2007
2008 srq = pd->device->create_srq(pd, &attr, &udata);
2009 if (IS_ERR(srq)) {
2010 ret = PTR_ERR(srq);
2011 goto err_put;
2012 }
2013
2014 srq->device = pd->device;
2015 srq->pd = pd;
2016 srq->uobject = &obj->uobject;
2017 srq->event_handler = attr.event_handler;
2018 srq->srq_context = attr.srq_context;
2019 atomic_inc(&pd->usecnt);
2020 atomic_set(&srq->usecnt, 0);
2021
2022 obj->uobject.object = srq;
2023 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2024 if (ret)
2025 goto err_destroy;
2026
2027 memset(&resp, 0, sizeof resp);
2028 resp.srq_handle = obj->uobject.id;
2029 resp.max_wr = attr.attr.max_wr;
2030 resp.max_sge = attr.attr.max_sge;
2031
2032 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2033 &resp, sizeof resp)) {
2034 ret = -EFAULT;
2035 goto err_copy;
2036 }
2037
2038 put_pd_read(pd);
2039
2040 mutex_lock(&file->mutex);
2041 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2042 mutex_unlock(&file->mutex);
2043
2044 obj->uobject.live = 1;
2045
2046 up_write(&obj->uobject.mutex);
2047
2048 return in_len;
2049
2050 err_copy:
2051 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2052
2053 err_destroy:
2054 ib_destroy_srq(srq);
2055
2056 err_put:
2057 put_pd_read(pd);
2058
2059 err:
2060 put_uobj_write(&obj->uobject);
2061 return ret;
2062 }
2063
2064 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2065 const char __user *buf, int in_len,
2066 int out_len)
2067 {
2068 struct ib_uverbs_modify_srq cmd;
2069 struct ib_udata udata;
2070 struct ib_srq *srq;
2071 struct ib_srq_attr attr;
2072 int ret;
2073
2074 if (copy_from_user(&cmd, buf, sizeof cmd))
2075 return -EFAULT;
2076
2077 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2078 out_len);
2079
2080 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2081 if (!srq)
2082 return -EINVAL;
2083
2084 attr.max_wr = cmd.max_wr;
2085 attr.srq_limit = cmd.srq_limit;
2086
2087 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2088
2089 put_srq_read(srq);
2090
2091 return ret ? ret : in_len;
2092 }
2093
2094 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2095 const char __user *buf,
2096 int in_len, int out_len)
2097 {
2098 struct ib_uverbs_query_srq cmd;
2099 struct ib_uverbs_query_srq_resp resp;
2100 struct ib_srq_attr attr;
2101 struct ib_srq *srq;
2102 int ret;
2103
2104 if (out_len < sizeof resp)
2105 return -ENOSPC;
2106
2107 if (copy_from_user(&cmd, buf, sizeof cmd))
2108 return -EFAULT;
2109
2110 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2111 if (!srq)
2112 return -EINVAL;
2113
2114 ret = ib_query_srq(srq, &attr);
2115
2116 put_srq_read(srq);
2117
2118 if (ret)
2119 return ret;
2120
2121 memset(&resp, 0, sizeof resp);
2122
2123 resp.max_wr = attr.max_wr;
2124 resp.max_sge = attr.max_sge;
2125 resp.srq_limit = attr.srq_limit;
2126
2127 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2128 &resp, sizeof resp))
2129 return -EFAULT;
2130
2131 return in_len;
2132 }
2133
2134 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2135 const char __user *buf, int in_len,
2136 int out_len)
2137 {
2138 struct ib_uverbs_destroy_srq cmd;
2139 struct ib_uverbs_destroy_srq_resp resp;
2140 struct ib_uobject *uobj;
2141 struct ib_srq *srq;
2142 struct ib_uevent_object *obj;
2143 int ret = -EINVAL;
2144
2145 if (copy_from_user(&cmd, buf, sizeof cmd))
2146 return -EFAULT;
2147
2148 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2149 if (!uobj)
2150 return -EINVAL;
2151 srq = uobj->object;
2152 obj = container_of(uobj, struct ib_uevent_object, uobject);
2153
2154 ret = ib_destroy_srq(srq);
2155 if (!ret)
2156 uobj->live = 0;
2157
2158 put_uobj_write(uobj);
2159
2160 if (ret)
2161 return ret;
2162
2163 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2164
2165 mutex_lock(&file->mutex);
2166 list_del(&uobj->list);
2167 mutex_unlock(&file->mutex);
2168
2169 ib_uverbs_release_uevent(file, obj);
2170
2171 memset(&resp, 0, sizeof resp);
2172 resp.events_reported = obj->events_reported;
2173
2174 put_uobj(uobj);
2175
2176 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2177 &resp, sizeof resp))
2178 ret = -EFAULT;
2179
2180 return ret ? ret : in_len;
2181 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree