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Pull bugzilla-7570 into release branch
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / infiniband / core / uverbs_cmd.c
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 *
35 * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
36 */
37
38 #include <linux/file.h>
39 #include <linux/fs.h>
40
41 #include <asm/uaccess.h>
42
43 #include "uverbs.h"
44
45 static struct lock_class_key pd_lock_key;
46 static struct lock_class_key mr_lock_key;
47 static struct lock_class_key cq_lock_key;
48 static struct lock_class_key qp_lock_key;
49 static struct lock_class_key ah_lock_key;
50 static struct lock_class_key srq_lock_key;
51
52 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
53 do { \
54 (udata)->inbuf = (void __user *) (ibuf); \
55 (udata)->outbuf = (void __user *) (obuf); \
56 (udata)->inlen = (ilen); \
57 (udata)->outlen = (olen); \
58 } while (0)
59
60 /*
61 * The ib_uobject locking scheme is as follows:
62 *
63 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
64 * needs to be held during all idr operations. When an object is
65 * looked up, a reference must be taken on the object's kref before
66 * dropping this lock.
67 *
68 * - Each object also has an rwsem. This rwsem must be held for
69 * reading while an operation that uses the object is performed.
70 * For example, while registering an MR, the associated PD's
71 * uobject.mutex must be held for reading. The rwsem must be held
72 * for writing while initializing or destroying an object.
73 *
74 * - In addition, each object has a "live" flag. If this flag is not
75 * set, then lookups of the object will fail even if it is found in
76 * the idr. This handles a reader that blocks and does not acquire
77 * the rwsem until after the object is destroyed. The destroy
78 * operation will set the live flag to 0 and then drop the rwsem;
79 * this will allow the reader to acquire the rwsem, see that the
80 * live flag is 0, and then drop the rwsem and its reference to
81 * object. The underlying storage will not be freed until the last
82 * reference to the object is dropped.
83 */
84
85 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
86 struct ib_ucontext *context, struct lock_class_key *key)
87 {
88 uobj->user_handle = user_handle;
89 uobj->context = context;
90 kref_init(&uobj->ref);
91 init_rwsem(&uobj->mutex);
92 lockdep_set_class(&uobj->mutex, key);
93 uobj->live = 0;
94 }
95
96 static void release_uobj(struct kref *kref)
97 {
98 kfree(container_of(kref, struct ib_uobject, ref));
99 }
100
101 static void put_uobj(struct ib_uobject *uobj)
102 {
103 kref_put(&uobj->ref, release_uobj);
104 }
105
106 static void put_uobj_read(struct ib_uobject *uobj)
107 {
108 up_read(&uobj->mutex);
109 put_uobj(uobj);
110 }
111
112 static void put_uobj_write(struct ib_uobject *uobj)
113 {
114 up_write(&uobj->mutex);
115 put_uobj(uobj);
116 }
117
118 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
119 {
120 int ret;
121
122 retry:
123 if (!idr_pre_get(idr, GFP_KERNEL))
124 return -ENOMEM;
125
126 spin_lock(&ib_uverbs_idr_lock);
127 ret = idr_get_new(idr, uobj, &uobj->id);
128 spin_unlock(&ib_uverbs_idr_lock);
129
130 if (ret == -EAGAIN)
131 goto retry;
132
133 return ret;
134 }
135
136 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
137 {
138 spin_lock(&ib_uverbs_idr_lock);
139 idr_remove(idr, uobj->id);
140 spin_unlock(&ib_uverbs_idr_lock);
141 }
142
143 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
144 struct ib_ucontext *context)
145 {
146 struct ib_uobject *uobj;
147
148 spin_lock(&ib_uverbs_idr_lock);
149 uobj = idr_find(idr, id);
150 if (uobj)
151 kref_get(&uobj->ref);
152 spin_unlock(&ib_uverbs_idr_lock);
153
154 return uobj;
155 }
156
157 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
158 struct ib_ucontext *context, int nested)
159 {
160 struct ib_uobject *uobj;
161
162 uobj = __idr_get_uobj(idr, id, context);
163 if (!uobj)
164 return NULL;
165
166 if (nested)
167 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
168 else
169 down_read(&uobj->mutex);
170 if (!uobj->live) {
171 put_uobj_read(uobj);
172 return NULL;
173 }
174
175 return uobj;
176 }
177
178 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
179 struct ib_ucontext *context)
180 {
181 struct ib_uobject *uobj;
182
183 uobj = __idr_get_uobj(idr, id, context);
184 if (!uobj)
185 return NULL;
186
187 down_write(&uobj->mutex);
188 if (!uobj->live) {
189 put_uobj_write(uobj);
190 return NULL;
191 }
192
193 return uobj;
194 }
195
196 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
197 int nested)
198 {
199 struct ib_uobject *uobj;
200
201 uobj = idr_read_uobj(idr, id, context, nested);
202 return uobj ? uobj->object : NULL;
203 }
204
205 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
206 {
207 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
208 }
209
210 static void put_pd_read(struct ib_pd *pd)
211 {
212 put_uobj_read(pd->uobject);
213 }
214
215 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
216 {
217 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
218 }
219
220 static void put_cq_read(struct ib_cq *cq)
221 {
222 put_uobj_read(cq->uobject);
223 }
224
225 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
226 {
227 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
228 }
229
230 static void put_ah_read(struct ib_ah *ah)
231 {
232 put_uobj_read(ah->uobject);
233 }
234
235 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
236 {
237 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
238 }
239
240 static void put_qp_read(struct ib_qp *qp)
241 {
242 put_uobj_read(qp->uobject);
243 }
244
245 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
246 {
247 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
248 }
249
250 static void put_srq_read(struct ib_srq *srq)
251 {
252 put_uobj_read(srq->uobject);
253 }
254
255 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
256 const char __user *buf,
257 int in_len, int out_len)
258 {
259 struct ib_uverbs_get_context cmd;
260 struct ib_uverbs_get_context_resp resp;
261 struct ib_udata udata;
262 struct ib_device *ibdev = file->device->ib_dev;
263 struct ib_ucontext *ucontext;
264 struct file *filp;
265 int ret;
266
267 if (out_len < sizeof resp)
268 return -ENOSPC;
269
270 if (copy_from_user(&cmd, buf, sizeof cmd))
271 return -EFAULT;
272
273 mutex_lock(&file->mutex);
274
275 if (file->ucontext) {
276 ret = -EINVAL;
277 goto err;
278 }
279
280 INIT_UDATA(&udata, buf + sizeof cmd,
281 (unsigned long) cmd.response + sizeof resp,
282 in_len - sizeof cmd, out_len - sizeof resp);
283
284 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
285 if (IS_ERR(ucontext)) {
286 ret = PTR_ERR(file->ucontext);
287 goto err;
288 }
289
290 ucontext->device = ibdev;
291 INIT_LIST_HEAD(&ucontext->pd_list);
292 INIT_LIST_HEAD(&ucontext->mr_list);
293 INIT_LIST_HEAD(&ucontext->mw_list);
294 INIT_LIST_HEAD(&ucontext->cq_list);
295 INIT_LIST_HEAD(&ucontext->qp_list);
296 INIT_LIST_HEAD(&ucontext->srq_list);
297 INIT_LIST_HEAD(&ucontext->ah_list);
298
299 resp.num_comp_vectors = file->device->num_comp_vectors;
300
301 filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
302 if (IS_ERR(filp)) {
303 ret = PTR_ERR(filp);
304 goto err_free;
305 }
306
307 if (copy_to_user((void __user *) (unsigned long) cmd.response,
308 &resp, sizeof resp)) {
309 ret = -EFAULT;
310 goto err_file;
311 }
312
313 file->async_file = filp->private_data;
314
315 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
316 ib_uverbs_event_handler);
317 ret = ib_register_event_handler(&file->event_handler);
318 if (ret)
319 goto err_file;
320
321 kref_get(&file->async_file->ref);
322 kref_get(&file->ref);
323 file->ucontext = ucontext;
324
325 fd_install(resp.async_fd, filp);
326
327 mutex_unlock(&file->mutex);
328
329 return in_len;
330
331 err_file:
332 put_unused_fd(resp.async_fd);
333 fput(filp);
334
335 err_free:
336 ibdev->dealloc_ucontext(ucontext);
337
338 err:
339 mutex_unlock(&file->mutex);
340 return ret;
341 }
342
343 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
344 const char __user *buf,
345 int in_len, int out_len)
346 {
347 struct ib_uverbs_query_device cmd;
348 struct ib_uverbs_query_device_resp resp;
349 struct ib_device_attr attr;
350 int ret;
351
352 if (out_len < sizeof resp)
353 return -ENOSPC;
354
355 if (copy_from_user(&cmd, buf, sizeof cmd))
356 return -EFAULT;
357
358 ret = ib_query_device(file->device->ib_dev, &attr);
359 if (ret)
360 return ret;
361
362 memset(&resp, 0, sizeof resp);
363
364 resp.fw_ver = attr.fw_ver;
365 resp.node_guid = file->device->ib_dev->node_guid;
366 resp.sys_image_guid = attr.sys_image_guid;
367 resp.max_mr_size = attr.max_mr_size;
368 resp.page_size_cap = attr.page_size_cap;
369 resp.vendor_id = attr.vendor_id;
370 resp.vendor_part_id = attr.vendor_part_id;
371 resp.hw_ver = attr.hw_ver;
372 resp.max_qp = attr.max_qp;
373 resp.max_qp_wr = attr.max_qp_wr;
374 resp.device_cap_flags = attr.device_cap_flags;
375 resp.max_sge = attr.max_sge;
376 resp.max_sge_rd = attr.max_sge_rd;
377 resp.max_cq = attr.max_cq;
378 resp.max_cqe = attr.max_cqe;
379 resp.max_mr = attr.max_mr;
380 resp.max_pd = attr.max_pd;
381 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
382 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
383 resp.max_res_rd_atom = attr.max_res_rd_atom;
384 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
385 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
386 resp.atomic_cap = attr.atomic_cap;
387 resp.max_ee = attr.max_ee;
388 resp.max_rdd = attr.max_rdd;
389 resp.max_mw = attr.max_mw;
390 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
391 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
392 resp.max_mcast_grp = attr.max_mcast_grp;
393 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
394 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
395 resp.max_ah = attr.max_ah;
396 resp.max_fmr = attr.max_fmr;
397 resp.max_map_per_fmr = attr.max_map_per_fmr;
398 resp.max_srq = attr.max_srq;
399 resp.max_srq_wr = attr.max_srq_wr;
400 resp.max_srq_sge = attr.max_srq_sge;
401 resp.max_pkeys = attr.max_pkeys;
402 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
403 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
404
405 if (copy_to_user((void __user *) (unsigned long) cmd.response,
406 &resp, sizeof resp))
407 return -EFAULT;
408
409 return in_len;
410 }
411
412 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
413 const char __user *buf,
414 int in_len, int out_len)
415 {
416 struct ib_uverbs_query_port cmd;
417 struct ib_uverbs_query_port_resp resp;
418 struct ib_port_attr attr;
419 int ret;
420
421 if (out_len < sizeof resp)
422 return -ENOSPC;
423
424 if (copy_from_user(&cmd, buf, sizeof cmd))
425 return -EFAULT;
426
427 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
428 if (ret)
429 return ret;
430
431 memset(&resp, 0, sizeof resp);
432
433 resp.state = attr.state;
434 resp.max_mtu = attr.max_mtu;
435 resp.active_mtu = attr.active_mtu;
436 resp.gid_tbl_len = attr.gid_tbl_len;
437 resp.port_cap_flags = attr.port_cap_flags;
438 resp.max_msg_sz = attr.max_msg_sz;
439 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
440 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
441 resp.pkey_tbl_len = attr.pkey_tbl_len;
442 resp.lid = attr.lid;
443 resp.sm_lid = attr.sm_lid;
444 resp.lmc = attr.lmc;
445 resp.max_vl_num = attr.max_vl_num;
446 resp.sm_sl = attr.sm_sl;
447 resp.subnet_timeout = attr.subnet_timeout;
448 resp.init_type_reply = attr.init_type_reply;
449 resp.active_width = attr.active_width;
450 resp.active_speed = attr.active_speed;
451 resp.phys_state = attr.phys_state;
452
453 if (copy_to_user((void __user *) (unsigned long) cmd.response,
454 &resp, sizeof resp))
455 return -EFAULT;
456
457 return in_len;
458 }
459
460 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
461 const char __user *buf,
462 int in_len, int out_len)
463 {
464 struct ib_uverbs_alloc_pd cmd;
465 struct ib_uverbs_alloc_pd_resp resp;
466 struct ib_udata udata;
467 struct ib_uobject *uobj;
468 struct ib_pd *pd;
469 int ret;
470
471 if (out_len < sizeof resp)
472 return -ENOSPC;
473
474 if (copy_from_user(&cmd, buf, sizeof cmd))
475 return -EFAULT;
476
477 INIT_UDATA(&udata, buf + sizeof cmd,
478 (unsigned long) cmd.response + sizeof resp,
479 in_len - sizeof cmd, out_len - sizeof resp);
480
481 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
482 if (!uobj)
483 return -ENOMEM;
484
485 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
486 down_write(&uobj->mutex);
487
488 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
489 file->ucontext, &udata);
490 if (IS_ERR(pd)) {
491 ret = PTR_ERR(pd);
492 goto err;
493 }
494
495 pd->device = file->device->ib_dev;
496 pd->uobject = uobj;
497 atomic_set(&pd->usecnt, 0);
498
499 uobj->object = pd;
500 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
501 if (ret)
502 goto err_idr;
503
504 memset(&resp, 0, sizeof resp);
505 resp.pd_handle = uobj->id;
506
507 if (copy_to_user((void __user *) (unsigned long) cmd.response,
508 &resp, sizeof resp)) {
509 ret = -EFAULT;
510 goto err_copy;
511 }
512
513 mutex_lock(&file->mutex);
514 list_add_tail(&uobj->list, &file->ucontext->pd_list);
515 mutex_unlock(&file->mutex);
516
517 uobj->live = 1;
518
519 up_write(&uobj->mutex);
520
521 return in_len;
522
523 err_copy:
524 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
525
526 err_idr:
527 ib_dealloc_pd(pd);
528
529 err:
530 put_uobj_write(uobj);
531 return ret;
532 }
533
534 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
535 const char __user *buf,
536 int in_len, int out_len)
537 {
538 struct ib_uverbs_dealloc_pd cmd;
539 struct ib_uobject *uobj;
540 int ret;
541
542 if (copy_from_user(&cmd, buf, sizeof cmd))
543 return -EFAULT;
544
545 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
546 if (!uobj)
547 return -EINVAL;
548
549 ret = ib_dealloc_pd(uobj->object);
550 if (!ret)
551 uobj->live = 0;
552
553 put_uobj_write(uobj);
554
555 if (ret)
556 return ret;
557
558 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
559
560 mutex_lock(&file->mutex);
561 list_del(&uobj->list);
562 mutex_unlock(&file->mutex);
563
564 put_uobj(uobj);
565
566 return in_len;
567 }
568
569 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
570 const char __user *buf, int in_len,
571 int out_len)
572 {
573 struct ib_uverbs_reg_mr cmd;
574 struct ib_uverbs_reg_mr_resp resp;
575 struct ib_udata udata;
576 struct ib_umem_object *obj;
577 struct ib_pd *pd;
578 struct ib_mr *mr;
579 int ret;
580
581 if (out_len < sizeof resp)
582 return -ENOSPC;
583
584 if (copy_from_user(&cmd, buf, sizeof cmd))
585 return -EFAULT;
586
587 INIT_UDATA(&udata, buf + sizeof cmd,
588 (unsigned long) cmd.response + sizeof resp,
589 in_len - sizeof cmd, out_len - sizeof resp);
590
591 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
592 return -EINVAL;
593
594 /*
595 * Local write permission is required if remote write or
596 * remote atomic permission is also requested.
597 */
598 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
599 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
600 return -EINVAL;
601
602 obj = kmalloc(sizeof *obj, GFP_KERNEL);
603 if (!obj)
604 return -ENOMEM;
605
606 init_uobj(&obj->uobject, 0, file->ucontext, &mr_lock_key);
607 down_write(&obj->uobject.mutex);
608
609 /*
610 * We ask for writable memory if any access flags other than
611 * "remote read" are set. "Local write" and "remote write"
612 * obviously require write access. "Remote atomic" can do
613 * things like fetch and add, which will modify memory, and
614 * "MW bind" can change permissions by binding a window.
615 */
616 ret = ib_umem_get(file->device->ib_dev, &obj->umem,
617 (void *) (unsigned long) cmd.start, cmd.length,
618 !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ));
619 if (ret)
620 goto err_free;
621
622 obj->umem.virt_base = cmd.hca_va;
623
624 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
625 if (!pd) {
626 ret = -EINVAL;
627 goto err_release;
628 }
629
630 mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata);
631 if (IS_ERR(mr)) {
632 ret = PTR_ERR(mr);
633 goto err_put;
634 }
635
636 mr->device = pd->device;
637 mr->pd = pd;
638 mr->uobject = &obj->uobject;
639 atomic_inc(&pd->usecnt);
640 atomic_set(&mr->usecnt, 0);
641
642 obj->uobject.object = mr;
643 ret = idr_add_uobj(&ib_uverbs_mr_idr, &obj->uobject);
644 if (ret)
645 goto err_unreg;
646
647 memset(&resp, 0, sizeof resp);
648 resp.lkey = mr->lkey;
649 resp.rkey = mr->rkey;
650 resp.mr_handle = obj->uobject.id;
651
652 if (copy_to_user((void __user *) (unsigned long) cmd.response,
653 &resp, sizeof resp)) {
654 ret = -EFAULT;
655 goto err_copy;
656 }
657
658 put_pd_read(pd);
659
660 mutex_lock(&file->mutex);
661 list_add_tail(&obj->uobject.list, &file->ucontext->mr_list);
662 mutex_unlock(&file->mutex);
663
664 obj->uobject.live = 1;
665
666 up_write(&obj->uobject.mutex);
667
668 return in_len;
669
670 err_copy:
671 idr_remove_uobj(&ib_uverbs_mr_idr, &obj->uobject);
672
673 err_unreg:
674 ib_dereg_mr(mr);
675
676 err_put:
677 put_pd_read(pd);
678
679 err_release:
680 ib_umem_release(file->device->ib_dev, &obj->umem);
681
682 err_free:
683 put_uobj_write(&obj->uobject);
684 return ret;
685 }
686
687 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
688 const char __user *buf, int in_len,
689 int out_len)
690 {
691 struct ib_uverbs_dereg_mr cmd;
692 struct ib_mr *mr;
693 struct ib_uobject *uobj;
694 struct ib_umem_object *memobj;
695 int ret = -EINVAL;
696
697 if (copy_from_user(&cmd, buf, sizeof cmd))
698 return -EFAULT;
699
700 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
701 if (!uobj)
702 return -EINVAL;
703
704 memobj = container_of(uobj, struct ib_umem_object, uobject);
705 mr = uobj->object;
706
707 ret = ib_dereg_mr(mr);
708 if (!ret)
709 uobj->live = 0;
710
711 put_uobj_write(uobj);
712
713 if (ret)
714 return ret;
715
716 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
717
718 mutex_lock(&file->mutex);
719 list_del(&uobj->list);
720 mutex_unlock(&file->mutex);
721
722 ib_umem_release(file->device->ib_dev, &memobj->umem);
723
724 put_uobj(uobj);
725
726 return in_len;
727 }
728
729 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
730 const char __user *buf, int in_len,
731 int out_len)
732 {
733 struct ib_uverbs_create_comp_channel cmd;
734 struct ib_uverbs_create_comp_channel_resp resp;
735 struct file *filp;
736
737 if (out_len < sizeof resp)
738 return -ENOSPC;
739
740 if (copy_from_user(&cmd, buf, sizeof cmd))
741 return -EFAULT;
742
743 filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
744 if (IS_ERR(filp))
745 return PTR_ERR(filp);
746
747 if (copy_to_user((void __user *) (unsigned long) cmd.response,
748 &resp, sizeof resp)) {
749 put_unused_fd(resp.fd);
750 fput(filp);
751 return -EFAULT;
752 }
753
754 fd_install(resp.fd, filp);
755 return in_len;
756 }
757
758 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
759 const char __user *buf, int in_len,
760 int out_len)
761 {
762 struct ib_uverbs_create_cq cmd;
763 struct ib_uverbs_create_cq_resp resp;
764 struct ib_udata udata;
765 struct ib_ucq_object *obj;
766 struct ib_uverbs_event_file *ev_file = NULL;
767 struct ib_cq *cq;
768 int ret;
769
770 if (out_len < sizeof resp)
771 return -ENOSPC;
772
773 if (copy_from_user(&cmd, buf, sizeof cmd))
774 return -EFAULT;
775
776 INIT_UDATA(&udata, buf + sizeof cmd,
777 (unsigned long) cmd.response + sizeof resp,
778 in_len - sizeof cmd, out_len - sizeof resp);
779
780 if (cmd.comp_vector >= file->device->num_comp_vectors)
781 return -EINVAL;
782
783 obj = kmalloc(sizeof *obj, GFP_KERNEL);
784 if (!obj)
785 return -ENOMEM;
786
787 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
788 down_write(&obj->uobject.mutex);
789
790 if (cmd.comp_channel >= 0) {
791 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
792 if (!ev_file) {
793 ret = -EINVAL;
794 goto err;
795 }
796 }
797
798 obj->uverbs_file = file;
799 obj->comp_events_reported = 0;
800 obj->async_events_reported = 0;
801 INIT_LIST_HEAD(&obj->comp_list);
802 INIT_LIST_HEAD(&obj->async_list);
803
804 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
805 file->ucontext, &udata);
806 if (IS_ERR(cq)) {
807 ret = PTR_ERR(cq);
808 goto err_file;
809 }
810
811 cq->device = file->device->ib_dev;
812 cq->uobject = &obj->uobject;
813 cq->comp_handler = ib_uverbs_comp_handler;
814 cq->event_handler = ib_uverbs_cq_event_handler;
815 cq->cq_context = ev_file;
816 atomic_set(&cq->usecnt, 0);
817
818 obj->uobject.object = cq;
819 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
820 if (ret)
821 goto err_free;
822
823 memset(&resp, 0, sizeof resp);
824 resp.cq_handle = obj->uobject.id;
825 resp.cqe = cq->cqe;
826
827 if (copy_to_user((void __user *) (unsigned long) cmd.response,
828 &resp, sizeof resp)) {
829 ret = -EFAULT;
830 goto err_copy;
831 }
832
833 mutex_lock(&file->mutex);
834 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
835 mutex_unlock(&file->mutex);
836
837 obj->uobject.live = 1;
838
839 up_write(&obj->uobject.mutex);
840
841 return in_len;
842
843 err_copy:
844 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
845
846 err_free:
847 ib_destroy_cq(cq);
848
849 err_file:
850 if (ev_file)
851 ib_uverbs_release_ucq(file, ev_file, obj);
852
853 err:
854 put_uobj_write(&obj->uobject);
855 return ret;
856 }
857
858 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
859 const char __user *buf, int in_len,
860 int out_len)
861 {
862 struct ib_uverbs_resize_cq cmd;
863 struct ib_uverbs_resize_cq_resp resp;
864 struct ib_udata udata;
865 struct ib_cq *cq;
866 int ret = -EINVAL;
867
868 if (copy_from_user(&cmd, buf, sizeof cmd))
869 return -EFAULT;
870
871 INIT_UDATA(&udata, buf + sizeof cmd,
872 (unsigned long) cmd.response + sizeof resp,
873 in_len - sizeof cmd, out_len - sizeof resp);
874
875 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
876 if (!cq)
877 return -EINVAL;
878
879 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
880 if (ret)
881 goto out;
882
883 resp.cqe = cq->cqe;
884
885 if (copy_to_user((void __user *) (unsigned long) cmd.response,
886 &resp, sizeof resp.cqe))
887 ret = -EFAULT;
888
889 out:
890 put_cq_read(cq);
891
892 return ret ? ret : in_len;
893 }
894
895 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
896 const char __user *buf, int in_len,
897 int out_len)
898 {
899 struct ib_uverbs_poll_cq cmd;
900 struct ib_uverbs_poll_cq_resp *resp;
901 struct ib_cq *cq;
902 struct ib_wc *wc;
903 int ret = 0;
904 int i;
905 int rsize;
906
907 if (copy_from_user(&cmd, buf, sizeof cmd))
908 return -EFAULT;
909
910 wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
911 if (!wc)
912 return -ENOMEM;
913
914 rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
915 resp = kmalloc(rsize, GFP_KERNEL);
916 if (!resp) {
917 ret = -ENOMEM;
918 goto out_wc;
919 }
920
921 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
922 if (!cq) {
923 ret = -EINVAL;
924 goto out;
925 }
926
927 resp->count = ib_poll_cq(cq, cmd.ne, wc);
928
929 put_cq_read(cq);
930
931 for (i = 0; i < resp->count; i++) {
932 resp->wc[i].wr_id = wc[i].wr_id;
933 resp->wc[i].status = wc[i].status;
934 resp->wc[i].opcode = wc[i].opcode;
935 resp->wc[i].vendor_err = wc[i].vendor_err;
936 resp->wc[i].byte_len = wc[i].byte_len;
937 resp->wc[i].imm_data = (__u32 __force) wc[i].imm_data;
938 resp->wc[i].qp_num = wc[i].qp->qp_num;
939 resp->wc[i].src_qp = wc[i].src_qp;
940 resp->wc[i].wc_flags = wc[i].wc_flags;
941 resp->wc[i].pkey_index = wc[i].pkey_index;
942 resp->wc[i].slid = wc[i].slid;
943 resp->wc[i].sl = wc[i].sl;
944 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
945 resp->wc[i].port_num = wc[i].port_num;
946 }
947
948 if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
949 ret = -EFAULT;
950
951 out:
952 kfree(resp);
953
954 out_wc:
955 kfree(wc);
956 return ret ? ret : in_len;
957 }
958
959 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
960 const char __user *buf, int in_len,
961 int out_len)
962 {
963 struct ib_uverbs_req_notify_cq cmd;
964 struct ib_cq *cq;
965
966 if (copy_from_user(&cmd, buf, sizeof cmd))
967 return -EFAULT;
968
969 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
970 if (!cq)
971 return -EINVAL;
972
973 ib_req_notify_cq(cq, cmd.solicited_only ?
974 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
975
976 put_cq_read(cq);
977
978 return in_len;
979 }
980
981 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
982 const char __user *buf, int in_len,
983 int out_len)
984 {
985 struct ib_uverbs_destroy_cq cmd;
986 struct ib_uverbs_destroy_cq_resp resp;
987 struct ib_uobject *uobj;
988 struct ib_cq *cq;
989 struct ib_ucq_object *obj;
990 struct ib_uverbs_event_file *ev_file;
991 int ret = -EINVAL;
992
993 if (copy_from_user(&cmd, buf, sizeof cmd))
994 return -EFAULT;
995
996 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
997 if (!uobj)
998 return -EINVAL;
999 cq = uobj->object;
1000 ev_file = cq->cq_context;
1001 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1002
1003 ret = ib_destroy_cq(cq);
1004 if (!ret)
1005 uobj->live = 0;
1006
1007 put_uobj_write(uobj);
1008
1009 if (ret)
1010 return ret;
1011
1012 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1013
1014 mutex_lock(&file->mutex);
1015 list_del(&uobj->list);
1016 mutex_unlock(&file->mutex);
1017
1018 ib_uverbs_release_ucq(file, ev_file, obj);
1019
1020 memset(&resp, 0, sizeof resp);
1021 resp.comp_events_reported = obj->comp_events_reported;
1022 resp.async_events_reported = obj->async_events_reported;
1023
1024 put_uobj(uobj);
1025
1026 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1027 &resp, sizeof resp))
1028 return -EFAULT;
1029
1030 return in_len;
1031 }
1032
1033 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1034 const char __user *buf, int in_len,
1035 int out_len)
1036 {
1037 struct ib_uverbs_create_qp cmd;
1038 struct ib_uverbs_create_qp_resp resp;
1039 struct ib_udata udata;
1040 struct ib_uqp_object *obj;
1041 struct ib_pd *pd;
1042 struct ib_cq *scq, *rcq;
1043 struct ib_srq *srq;
1044 struct ib_qp *qp;
1045 struct ib_qp_init_attr attr;
1046 int ret;
1047
1048 if (out_len < sizeof resp)
1049 return -ENOSPC;
1050
1051 if (copy_from_user(&cmd, buf, sizeof cmd))
1052 return -EFAULT;
1053
1054 INIT_UDATA(&udata, buf + sizeof cmd,
1055 (unsigned long) cmd.response + sizeof resp,
1056 in_len - sizeof cmd, out_len - sizeof resp);
1057
1058 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1059 if (!obj)
1060 return -ENOMEM;
1061
1062 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1063 down_write(&obj->uevent.uobject.mutex);
1064
1065 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1066 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1067 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1068 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1069 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1070
1071 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1072 ret = -EINVAL;
1073 goto err_put;
1074 }
1075
1076 attr.event_handler = ib_uverbs_qp_event_handler;
1077 attr.qp_context = file;
1078 attr.send_cq = scq;
1079 attr.recv_cq = rcq;
1080 attr.srq = srq;
1081 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1082 attr.qp_type = cmd.qp_type;
1083
1084 attr.cap.max_send_wr = cmd.max_send_wr;
1085 attr.cap.max_recv_wr = cmd.max_recv_wr;
1086 attr.cap.max_send_sge = cmd.max_send_sge;
1087 attr.cap.max_recv_sge = cmd.max_recv_sge;
1088 attr.cap.max_inline_data = cmd.max_inline_data;
1089
1090 obj->uevent.events_reported = 0;
1091 INIT_LIST_HEAD(&obj->uevent.event_list);
1092 INIT_LIST_HEAD(&obj->mcast_list);
1093
1094 qp = pd->device->create_qp(pd, &attr, &udata);
1095 if (IS_ERR(qp)) {
1096 ret = PTR_ERR(qp);
1097 goto err_put;
1098 }
1099
1100 qp->device = pd->device;
1101 qp->pd = pd;
1102 qp->send_cq = attr.send_cq;
1103 qp->recv_cq = attr.recv_cq;
1104 qp->srq = attr.srq;
1105 qp->uobject = &obj->uevent.uobject;
1106 qp->event_handler = attr.event_handler;
1107 qp->qp_context = attr.qp_context;
1108 qp->qp_type = attr.qp_type;
1109 atomic_inc(&pd->usecnt);
1110 atomic_inc(&attr.send_cq->usecnt);
1111 atomic_inc(&attr.recv_cq->usecnt);
1112 if (attr.srq)
1113 atomic_inc(&attr.srq->usecnt);
1114
1115 obj->uevent.uobject.object = qp;
1116 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1117 if (ret)
1118 goto err_destroy;
1119
1120 memset(&resp, 0, sizeof resp);
1121 resp.qpn = qp->qp_num;
1122 resp.qp_handle = obj->uevent.uobject.id;
1123 resp.max_recv_sge = attr.cap.max_recv_sge;
1124 resp.max_send_sge = attr.cap.max_send_sge;
1125 resp.max_recv_wr = attr.cap.max_recv_wr;
1126 resp.max_send_wr = attr.cap.max_send_wr;
1127 resp.max_inline_data = attr.cap.max_inline_data;
1128
1129 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1130 &resp, sizeof resp)) {
1131 ret = -EFAULT;
1132 goto err_copy;
1133 }
1134
1135 put_pd_read(pd);
1136 put_cq_read(scq);
1137 if (rcq != scq)
1138 put_cq_read(rcq);
1139 if (srq)
1140 put_srq_read(srq);
1141
1142 mutex_lock(&file->mutex);
1143 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1144 mutex_unlock(&file->mutex);
1145
1146 obj->uevent.uobject.live = 1;
1147
1148 up_write(&obj->uevent.uobject.mutex);
1149
1150 return in_len;
1151
1152 err_copy:
1153 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1154
1155 err_destroy:
1156 ib_destroy_qp(qp);
1157
1158 err_put:
1159 if (pd)
1160 put_pd_read(pd);
1161 if (scq)
1162 put_cq_read(scq);
1163 if (rcq && rcq != scq)
1164 put_cq_read(rcq);
1165 if (srq)
1166 put_srq_read(srq);
1167
1168 put_uobj_write(&obj->uevent.uobject);
1169 return ret;
1170 }
1171
1172 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1173 const char __user *buf, int in_len,
1174 int out_len)
1175 {
1176 struct ib_uverbs_query_qp cmd;
1177 struct ib_uverbs_query_qp_resp resp;
1178 struct ib_qp *qp;
1179 struct ib_qp_attr *attr;
1180 struct ib_qp_init_attr *init_attr;
1181 int ret;
1182
1183 if (copy_from_user(&cmd, buf, sizeof cmd))
1184 return -EFAULT;
1185
1186 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1187 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1188 if (!attr || !init_attr) {
1189 ret = -ENOMEM;
1190 goto out;
1191 }
1192
1193 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1194 if (!qp) {
1195 ret = -EINVAL;
1196 goto out;
1197 }
1198
1199 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1200
1201 put_qp_read(qp);
1202
1203 if (ret)
1204 goto out;
1205
1206 memset(&resp, 0, sizeof resp);
1207
1208 resp.qp_state = attr->qp_state;
1209 resp.cur_qp_state = attr->cur_qp_state;
1210 resp.path_mtu = attr->path_mtu;
1211 resp.path_mig_state = attr->path_mig_state;
1212 resp.qkey = attr->qkey;
1213 resp.rq_psn = attr->rq_psn;
1214 resp.sq_psn = attr->sq_psn;
1215 resp.dest_qp_num = attr->dest_qp_num;
1216 resp.qp_access_flags = attr->qp_access_flags;
1217 resp.pkey_index = attr->pkey_index;
1218 resp.alt_pkey_index = attr->alt_pkey_index;
1219 resp.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 next->imm_data = (__be32 __force) user_wr->imm_data;
1481
1482 if (is_ud) {
1483 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1484 file->ucontext);
1485 if (!next->wr.ud.ah) {
1486 ret = -EINVAL;
1487 goto out_put;
1488 }
1489 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1490 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1491 } else {
1492 switch (next->opcode) {
1493 case IB_WR_RDMA_WRITE:
1494 case IB_WR_RDMA_WRITE_WITH_IMM:
1495 case IB_WR_RDMA_READ:
1496 next->wr.rdma.remote_addr =
1497 user_wr->wr.rdma.remote_addr;
1498 next->wr.rdma.rkey =
1499 user_wr->wr.rdma.rkey;
1500 break;
1501 case IB_WR_ATOMIC_CMP_AND_SWP:
1502 case IB_WR_ATOMIC_FETCH_AND_ADD:
1503 next->wr.atomic.remote_addr =
1504 user_wr->wr.atomic.remote_addr;
1505 next->wr.atomic.compare_add =
1506 user_wr->wr.atomic.compare_add;
1507 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1508 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1509 break;
1510 default:
1511 break;
1512 }
1513 }
1514
1515 if (next->num_sge) {
1516 next->sg_list = (void *) next +
1517 ALIGN(sizeof *next, sizeof (struct ib_sge));
1518 if (copy_from_user(next->sg_list,
1519 buf + sizeof cmd +
1520 cmd.wr_count * cmd.wqe_size +
1521 sg_ind * sizeof (struct ib_sge),
1522 next->num_sge * sizeof (struct ib_sge))) {
1523 ret = -EFAULT;
1524 goto out_put;
1525 }
1526 sg_ind += next->num_sge;
1527 } else
1528 next->sg_list = NULL;
1529 }
1530
1531 resp.bad_wr = 0;
1532 ret = qp->device->post_send(qp, wr, &bad_wr);
1533 if (ret)
1534 for (next = wr; next; next = next->next) {
1535 ++resp.bad_wr;
1536 if (next == bad_wr)
1537 break;
1538 }
1539
1540 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1541 &resp, sizeof resp))
1542 ret = -EFAULT;
1543
1544 out_put:
1545 put_qp_read(qp);
1546
1547 while (wr) {
1548 if (is_ud && wr->wr.ud.ah)
1549 put_ah_read(wr->wr.ud.ah);
1550 next = wr->next;
1551 kfree(wr);
1552 wr = next;
1553 }
1554
1555 out:
1556 kfree(user_wr);
1557
1558 return ret ? ret : in_len;
1559 }
1560
1561 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1562 int in_len,
1563 u32 wr_count,
1564 u32 sge_count,
1565 u32 wqe_size)
1566 {
1567 struct ib_uverbs_recv_wr *user_wr;
1568 struct ib_recv_wr *wr = NULL, *last, *next;
1569 int sg_ind;
1570 int i;
1571 int ret;
1572
1573 if (in_len < wqe_size * wr_count +
1574 sge_count * sizeof (struct ib_uverbs_sge))
1575 return ERR_PTR(-EINVAL);
1576
1577 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1578 return ERR_PTR(-EINVAL);
1579
1580 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1581 if (!user_wr)
1582 return ERR_PTR(-ENOMEM);
1583
1584 sg_ind = 0;
1585 last = NULL;
1586 for (i = 0; i < wr_count; ++i) {
1587 if (copy_from_user(user_wr, buf + i * wqe_size,
1588 wqe_size)) {
1589 ret = -EFAULT;
1590 goto err;
1591 }
1592
1593 if (user_wr->num_sge + sg_ind > sge_count) {
1594 ret = -EINVAL;
1595 goto err;
1596 }
1597
1598 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1599 user_wr->num_sge * sizeof (struct ib_sge),
1600 GFP_KERNEL);
1601 if (!next) {
1602 ret = -ENOMEM;
1603 goto err;
1604 }
1605
1606 if (!last)
1607 wr = next;
1608 else
1609 last->next = next;
1610 last = next;
1611
1612 next->next = NULL;
1613 next->wr_id = user_wr->wr_id;
1614 next->num_sge = user_wr->num_sge;
1615
1616 if (next->num_sge) {
1617 next->sg_list = (void *) next +
1618 ALIGN(sizeof *next, sizeof (struct ib_sge));
1619 if (copy_from_user(next->sg_list,
1620 buf + wr_count * wqe_size +
1621 sg_ind * sizeof (struct ib_sge),
1622 next->num_sge * sizeof (struct ib_sge))) {
1623 ret = -EFAULT;
1624 goto err;
1625 }
1626 sg_ind += next->num_sge;
1627 } else
1628 next->sg_list = NULL;
1629 }
1630
1631 kfree(user_wr);
1632 return wr;
1633
1634 err:
1635 kfree(user_wr);
1636
1637 while (wr) {
1638 next = wr->next;
1639 kfree(wr);
1640 wr = next;
1641 }
1642
1643 return ERR_PTR(ret);
1644 }
1645
1646 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1647 const char __user *buf, int in_len,
1648 int out_len)
1649 {
1650 struct ib_uverbs_post_recv cmd;
1651 struct ib_uverbs_post_recv_resp resp;
1652 struct ib_recv_wr *wr, *next, *bad_wr;
1653 struct ib_qp *qp;
1654 ssize_t ret = -EINVAL;
1655
1656 if (copy_from_user(&cmd, buf, sizeof cmd))
1657 return -EFAULT;
1658
1659 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1660 in_len - sizeof cmd, cmd.wr_count,
1661 cmd.sge_count, cmd.wqe_size);
1662 if (IS_ERR(wr))
1663 return PTR_ERR(wr);
1664
1665 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1666 if (!qp)
1667 goto out;
1668
1669 resp.bad_wr = 0;
1670 ret = qp->device->post_recv(qp, wr, &bad_wr);
1671
1672 put_qp_read(qp);
1673
1674 if (ret)
1675 for (next = wr; next; next = next->next) {
1676 ++resp.bad_wr;
1677 if (next == bad_wr)
1678 break;
1679 }
1680
1681 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1682 &resp, sizeof resp))
1683 ret = -EFAULT;
1684
1685 out:
1686 while (wr) {
1687 next = wr->next;
1688 kfree(wr);
1689 wr = next;
1690 }
1691
1692 return ret ? ret : in_len;
1693 }
1694
1695 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1696 const char __user *buf, int in_len,
1697 int out_len)
1698 {
1699 struct ib_uverbs_post_srq_recv cmd;
1700 struct ib_uverbs_post_srq_recv_resp resp;
1701 struct ib_recv_wr *wr, *next, *bad_wr;
1702 struct ib_srq *srq;
1703 ssize_t ret = -EINVAL;
1704
1705 if (copy_from_user(&cmd, buf, sizeof cmd))
1706 return -EFAULT;
1707
1708 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1709 in_len - sizeof cmd, cmd.wr_count,
1710 cmd.sge_count, cmd.wqe_size);
1711 if (IS_ERR(wr))
1712 return PTR_ERR(wr);
1713
1714 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1715 if (!srq)
1716 goto out;
1717
1718 resp.bad_wr = 0;
1719 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1720
1721 put_srq_read(srq);
1722
1723 if (ret)
1724 for (next = wr; next; next = next->next) {
1725 ++resp.bad_wr;
1726 if (next == bad_wr)
1727 break;
1728 }
1729
1730 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1731 &resp, sizeof resp))
1732 ret = -EFAULT;
1733
1734 out:
1735 while (wr) {
1736 next = wr->next;
1737 kfree(wr);
1738 wr = next;
1739 }
1740
1741 return ret ? ret : in_len;
1742 }
1743
1744 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1745 const char __user *buf, int in_len,
1746 int out_len)
1747 {
1748 struct ib_uverbs_create_ah cmd;
1749 struct ib_uverbs_create_ah_resp resp;
1750 struct ib_uobject *uobj;
1751 struct ib_pd *pd;
1752 struct ib_ah *ah;
1753 struct ib_ah_attr attr;
1754 int ret;
1755
1756 if (out_len < sizeof resp)
1757 return -ENOSPC;
1758
1759 if (copy_from_user(&cmd, buf, sizeof cmd))
1760 return -EFAULT;
1761
1762 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1763 if (!uobj)
1764 return -ENOMEM;
1765
1766 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1767 down_write(&uobj->mutex);
1768
1769 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1770 if (!pd) {
1771 ret = -EINVAL;
1772 goto err;
1773 }
1774
1775 attr.dlid = cmd.attr.dlid;
1776 attr.sl = cmd.attr.sl;
1777 attr.src_path_bits = cmd.attr.src_path_bits;
1778 attr.static_rate = cmd.attr.static_rate;
1779 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
1780 attr.port_num = cmd.attr.port_num;
1781 attr.grh.flow_label = cmd.attr.grh.flow_label;
1782 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1783 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1784 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1785 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1786
1787 ah = ib_create_ah(pd, &attr);
1788 if (IS_ERR(ah)) {
1789 ret = PTR_ERR(ah);
1790 goto err_put;
1791 }
1792
1793 ah->uobject = uobj;
1794 uobj->object = ah;
1795
1796 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1797 if (ret)
1798 goto err_destroy;
1799
1800 resp.ah_handle = uobj->id;
1801
1802 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1803 &resp, sizeof resp)) {
1804 ret = -EFAULT;
1805 goto err_copy;
1806 }
1807
1808 put_pd_read(pd);
1809
1810 mutex_lock(&file->mutex);
1811 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1812 mutex_unlock(&file->mutex);
1813
1814 uobj->live = 1;
1815
1816 up_write(&uobj->mutex);
1817
1818 return in_len;
1819
1820 err_copy:
1821 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1822
1823 err_destroy:
1824 ib_destroy_ah(ah);
1825
1826 err_put:
1827 put_pd_read(pd);
1828
1829 err:
1830 put_uobj_write(uobj);
1831 return ret;
1832 }
1833
1834 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1835 const char __user *buf, int in_len, int out_len)
1836 {
1837 struct ib_uverbs_destroy_ah cmd;
1838 struct ib_ah *ah;
1839 struct ib_uobject *uobj;
1840 int ret;
1841
1842 if (copy_from_user(&cmd, buf, sizeof cmd))
1843 return -EFAULT;
1844
1845 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1846 if (!uobj)
1847 return -EINVAL;
1848 ah = uobj->object;
1849
1850 ret = ib_destroy_ah(ah);
1851 if (!ret)
1852 uobj->live = 0;
1853
1854 put_uobj_write(uobj);
1855
1856 if (ret)
1857 return ret;
1858
1859 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1860
1861 mutex_lock(&file->mutex);
1862 list_del(&uobj->list);
1863 mutex_unlock(&file->mutex);
1864
1865 put_uobj(uobj);
1866
1867 return in_len;
1868 }
1869
1870 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1871 const char __user *buf, int in_len,
1872 int out_len)
1873 {
1874 struct ib_uverbs_attach_mcast cmd;
1875 struct ib_qp *qp;
1876 struct ib_uqp_object *obj;
1877 struct ib_uverbs_mcast_entry *mcast;
1878 int ret;
1879
1880 if (copy_from_user(&cmd, buf, sizeof cmd))
1881 return -EFAULT;
1882
1883 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1884 if (!qp)
1885 return -EINVAL;
1886
1887 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1888
1889 list_for_each_entry(mcast, &obj->mcast_list, list)
1890 if (cmd.mlid == mcast->lid &&
1891 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1892 ret = 0;
1893 goto out_put;
1894 }
1895
1896 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1897 if (!mcast) {
1898 ret = -ENOMEM;
1899 goto out_put;
1900 }
1901
1902 mcast->lid = cmd.mlid;
1903 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1904
1905 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1906 if (!ret)
1907 list_add_tail(&mcast->list, &obj->mcast_list);
1908 else
1909 kfree(mcast);
1910
1911 out_put:
1912 put_qp_read(qp);
1913
1914 return ret ? ret : in_len;
1915 }
1916
1917 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1918 const char __user *buf, int in_len,
1919 int out_len)
1920 {
1921 struct ib_uverbs_detach_mcast cmd;
1922 struct ib_uqp_object *obj;
1923 struct ib_qp *qp;
1924 struct ib_uverbs_mcast_entry *mcast;
1925 int ret = -EINVAL;
1926
1927 if (copy_from_user(&cmd, buf, sizeof cmd))
1928 return -EFAULT;
1929
1930 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1931 if (!qp)
1932 return -EINVAL;
1933
1934 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1935 if (ret)
1936 goto out_put;
1937
1938 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1939
1940 list_for_each_entry(mcast, &obj->mcast_list, list)
1941 if (cmd.mlid == mcast->lid &&
1942 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1943 list_del(&mcast->list);
1944 kfree(mcast);
1945 break;
1946 }
1947
1948 out_put:
1949 put_qp_read(qp);
1950
1951 return ret ? ret : in_len;
1952 }
1953
1954 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1955 const char __user *buf, int in_len,
1956 int out_len)
1957 {
1958 struct ib_uverbs_create_srq cmd;
1959 struct ib_uverbs_create_srq_resp resp;
1960 struct ib_udata udata;
1961 struct ib_uevent_object *obj;
1962 struct ib_pd *pd;
1963 struct ib_srq *srq;
1964 struct ib_srq_init_attr attr;
1965 int ret;
1966
1967 if (out_len < sizeof resp)
1968 return -ENOSPC;
1969
1970 if (copy_from_user(&cmd, buf, sizeof cmd))
1971 return -EFAULT;
1972
1973 INIT_UDATA(&udata, buf + sizeof cmd,
1974 (unsigned long) cmd.response + sizeof resp,
1975 in_len - sizeof cmd, out_len - sizeof resp);
1976
1977 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1978 if (!obj)
1979 return -ENOMEM;
1980
1981 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
1982 down_write(&obj->uobject.mutex);
1983
1984 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1985 if (!pd) {
1986 ret = -EINVAL;
1987 goto err;
1988 }
1989
1990 attr.event_handler = ib_uverbs_srq_event_handler;
1991 attr.srq_context = file;
1992 attr.attr.max_wr = cmd.max_wr;
1993 attr.attr.max_sge = cmd.max_sge;
1994 attr.attr.srq_limit = cmd.srq_limit;
1995
1996 obj->events_reported = 0;
1997 INIT_LIST_HEAD(&obj->event_list);
1998
1999 srq = pd->device->create_srq(pd, &attr, &udata);
2000 if (IS_ERR(srq)) {
2001 ret = PTR_ERR(srq);
2002 goto err_put;
2003 }
2004
2005 srq->device = pd->device;
2006 srq->pd = pd;
2007 srq->uobject = &obj->uobject;
2008 srq->event_handler = attr.event_handler;
2009 srq->srq_context = attr.srq_context;
2010 atomic_inc(&pd->usecnt);
2011 atomic_set(&srq->usecnt, 0);
2012
2013 obj->uobject.object = srq;
2014 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2015 if (ret)
2016 goto err_destroy;
2017
2018 memset(&resp, 0, sizeof resp);
2019 resp.srq_handle = obj->uobject.id;
2020 resp.max_wr = attr.attr.max_wr;
2021 resp.max_sge = attr.attr.max_sge;
2022
2023 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2024 &resp, sizeof resp)) {
2025 ret = -EFAULT;
2026 goto err_copy;
2027 }
2028
2029 put_pd_read(pd);
2030
2031 mutex_lock(&file->mutex);
2032 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2033 mutex_unlock(&file->mutex);
2034
2035 obj->uobject.live = 1;
2036
2037 up_write(&obj->uobject.mutex);
2038
2039 return in_len;
2040
2041 err_copy:
2042 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2043
2044 err_destroy:
2045 ib_destroy_srq(srq);
2046
2047 err_put:
2048 put_pd_read(pd);
2049
2050 err:
2051 put_uobj_write(&obj->uobject);
2052 return ret;
2053 }
2054
2055 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2056 const char __user *buf, int in_len,
2057 int out_len)
2058 {
2059 struct ib_uverbs_modify_srq cmd;
2060 struct ib_udata udata;
2061 struct ib_srq *srq;
2062 struct ib_srq_attr attr;
2063 int ret;
2064
2065 if (copy_from_user(&cmd, buf, sizeof cmd))
2066 return -EFAULT;
2067
2068 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2069 out_len);
2070
2071 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2072 if (!srq)
2073 return -EINVAL;
2074
2075 attr.max_wr = cmd.max_wr;
2076 attr.srq_limit = cmd.srq_limit;
2077
2078 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2079
2080 put_srq_read(srq);
2081
2082 return ret ? ret : in_len;
2083 }
2084
2085 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2086 const char __user *buf,
2087 int in_len, int out_len)
2088 {
2089 struct ib_uverbs_query_srq cmd;
2090 struct ib_uverbs_query_srq_resp resp;
2091 struct ib_srq_attr attr;
2092 struct ib_srq *srq;
2093 int ret;
2094
2095 if (out_len < sizeof resp)
2096 return -ENOSPC;
2097
2098 if (copy_from_user(&cmd, buf, sizeof cmd))
2099 return -EFAULT;
2100
2101 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2102 if (!srq)
2103 return -EINVAL;
2104
2105 ret = ib_query_srq(srq, &attr);
2106
2107 put_srq_read(srq);
2108
2109 if (ret)
2110 return ret;
2111
2112 memset(&resp, 0, sizeof resp);
2113
2114 resp.max_wr = attr.max_wr;
2115 resp.max_sge = attr.max_sge;
2116 resp.srq_limit = attr.srq_limit;
2117
2118 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2119 &resp, sizeof resp))
2120 return -EFAULT;
2121
2122 return in_len;
2123 }
2124
2125 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2126 const char __user *buf, int in_len,
2127 int out_len)
2128 {
2129 struct ib_uverbs_destroy_srq cmd;
2130 struct ib_uverbs_destroy_srq_resp resp;
2131 struct ib_uobject *uobj;
2132 struct ib_srq *srq;
2133 struct ib_uevent_object *obj;
2134 int ret = -EINVAL;
2135
2136 if (copy_from_user(&cmd, buf, sizeof cmd))
2137 return -EFAULT;
2138
2139 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2140 if (!uobj)
2141 return -EINVAL;
2142 srq = uobj->object;
2143 obj = container_of(uobj, struct ib_uevent_object, uobject);
2144
2145 ret = ib_destroy_srq(srq);
2146 if (!ret)
2147 uobj->live = 0;
2148
2149 put_uobj_write(uobj);
2150
2151 if (ret)
2152 return ret;
2153
2154 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2155
2156 mutex_lock(&file->mutex);
2157 list_del(&uobj->list);
2158 mutex_unlock(&file->mutex);
2159
2160 ib_uverbs_release_uevent(file, obj);
2161
2162 memset(&resp, 0, sizeof resp);
2163 resp.events_reported = obj->events_reported;
2164
2165 put_uobj(uobj);
2166
2167 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2168 &resp, sizeof resp))
2169 ret = -EFAULT;
2170
2171 return ret ? ret : in_len;
2172 }
kernel source for telekom puls (alcatel/mediatek)