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