RDMA/core: Add SRQ type field
[linux-3.10.git] / drivers / infiniband / core / uverbs_cmd.c
1 /*
2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
4  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
5  * Copyright (c) 2006 Mellanox Technologies.  All rights reserved.
6  *
7  * This software is available to you under a choice of one of two
8  * licenses.  You may choose to be licensed under the terms of the GNU
9  * General Public License (GPL) Version 2, available from the file
10  * COPYING in the main directory of this source tree, or the
11  * OpenIB.org BSD license below:
12  *
13  *     Redistribution and use in source and binary forms, with or
14  *     without modification, are permitted provided that the following
15  *     conditions are met:
16  *
17  *      - Redistributions of source code must retain the above
18  *        copyright notice, this list of conditions and the following
19  *        disclaimer.
20  *
21  *      - Redistributions in binary form must reproduce the above
22  *        copyright notice, this list of conditions and the following
23  *        disclaimer in the documentation and/or other materials
24  *        provided with the distribution.
25  *
26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33  * SOFTWARE.
34  */
35
36 #include <linux/file.h>
37 #include <linux/fs.h>
38 #include <linux/slab.h>
39
40 #include <asm/uaccess.h>
41
42 #include "uverbs.h"
43
44 static struct lock_class_key pd_lock_key;
45 static struct lock_class_key mr_lock_key;
46 static struct lock_class_key cq_lock_key;
47 static struct lock_class_key qp_lock_key;
48 static struct lock_class_key ah_lock_key;
49 static struct lock_class_key srq_lock_key;
50
51 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen)                       \
52         do {                                                            \
53                 (udata)->inbuf  = (void __user *) (ibuf);               \
54                 (udata)->outbuf = (void __user *) (obuf);               \
55                 (udata)->inlen  = (ilen);                               \
56                 (udata)->outlen = (olen);                               \
57         } while (0)
58
59 /*
60  * The ib_uobject locking scheme is as follows:
61  *
62  * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
63  *   needs to be held during all idr operations.  When an object is
64  *   looked up, a reference must be taken on the object's kref before
65  *   dropping this lock.
66  *
67  * - Each object also has an rwsem.  This rwsem must be held for
68  *   reading while an operation that uses the object is performed.
69  *   For example, while registering an MR, the associated PD's
70  *   uobject.mutex must be held for reading.  The rwsem must be held
71  *   for writing while initializing or destroying an object.
72  *
73  * - In addition, each object has a "live" flag.  If this flag is not
74  *   set, then lookups of the object will fail even if it is found in
75  *   the idr.  This handles a reader that blocks and does not acquire
76  *   the rwsem until after the object is destroyed.  The destroy
77  *   operation will set the live flag to 0 and then drop the rwsem;
78  *   this will allow the reader to acquire the rwsem, see that the
79  *   live flag is 0, and then drop the rwsem and its reference to
80  *   object.  The underlying storage will not be freed until the last
81  *   reference to the object is dropped.
82  */
83
84 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
85                       struct ib_ucontext *context, struct lock_class_key *key)
86 {
87         uobj->user_handle = user_handle;
88         uobj->context     = context;
89         kref_init(&uobj->ref);
90         init_rwsem(&uobj->mutex);
91         lockdep_set_class(&uobj->mutex, key);
92         uobj->live        = 0;
93 }
94
95 static void release_uobj(struct kref *kref)
96 {
97         kfree(container_of(kref, struct ib_uobject, ref));
98 }
99
100 static void put_uobj(struct ib_uobject *uobj)
101 {
102         kref_put(&uobj->ref, release_uobj);
103 }
104
105 static void put_uobj_read(struct ib_uobject *uobj)
106 {
107         up_read(&uobj->mutex);
108         put_uobj(uobj);
109 }
110
111 static void put_uobj_write(struct ib_uobject *uobj)
112 {
113         up_write(&uobj->mutex);
114         put_uobj(uobj);
115 }
116
117 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
118 {
119         int ret;
120
121 retry:
122         if (!idr_pre_get(idr, GFP_KERNEL))
123                 return -ENOMEM;
124
125         spin_lock(&ib_uverbs_idr_lock);
126         ret = idr_get_new(idr, uobj, &uobj->id);
127         spin_unlock(&ib_uverbs_idr_lock);
128
129         if (ret == -EAGAIN)
130                 goto retry;
131
132         return ret;
133 }
134
135 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
136 {
137         spin_lock(&ib_uverbs_idr_lock);
138         idr_remove(idr, uobj->id);
139         spin_unlock(&ib_uverbs_idr_lock);
140 }
141
142 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
143                                          struct ib_ucontext *context)
144 {
145         struct ib_uobject *uobj;
146
147         spin_lock(&ib_uverbs_idr_lock);
148         uobj = idr_find(idr, id);
149         if (uobj) {
150                 if (uobj->context == context)
151                         kref_get(&uobj->ref);
152                 else
153                         uobj = NULL;
154         }
155         spin_unlock(&ib_uverbs_idr_lock);
156
157         return uobj;
158 }
159
160 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
161                                         struct ib_ucontext *context, int nested)
162 {
163         struct ib_uobject *uobj;
164
165         uobj = __idr_get_uobj(idr, id, context);
166         if (!uobj)
167                 return NULL;
168
169         if (nested)
170                 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
171         else
172                 down_read(&uobj->mutex);
173         if (!uobj->live) {
174                 put_uobj_read(uobj);
175                 return NULL;
176         }
177
178         return uobj;
179 }
180
181 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
182                                          struct ib_ucontext *context)
183 {
184         struct ib_uobject *uobj;
185
186         uobj = __idr_get_uobj(idr, id, context);
187         if (!uobj)
188                 return NULL;
189
190         down_write(&uobj->mutex);
191         if (!uobj->live) {
192                 put_uobj_write(uobj);
193                 return NULL;
194         }
195
196         return uobj;
197 }
198
199 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
200                           int nested)
201 {
202         struct ib_uobject *uobj;
203
204         uobj = idr_read_uobj(idr, id, context, nested);
205         return uobj ? uobj->object : NULL;
206 }
207
208 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
209 {
210         return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
211 }
212
213 static void put_pd_read(struct ib_pd *pd)
214 {
215         put_uobj_read(pd->uobject);
216 }
217
218 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
219 {
220         return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
221 }
222
223 static void put_cq_read(struct ib_cq *cq)
224 {
225         put_uobj_read(cq->uobject);
226 }
227
228 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
229 {
230         return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
231 }
232
233 static void put_ah_read(struct ib_ah *ah)
234 {
235         put_uobj_read(ah->uobject);
236 }
237
238 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
239 {
240         return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
241 }
242
243 static void put_qp_read(struct ib_qp *qp)
244 {
245         put_uobj_read(qp->uobject);
246 }
247
248 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
249 {
250         return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
251 }
252
253 static void put_srq_read(struct ib_srq *srq)
254 {
255         put_uobj_read(srq->uobject);
256 }
257
258 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
259                               const char __user *buf,
260                               int in_len, int out_len)
261 {
262         struct ib_uverbs_get_context      cmd;
263         struct ib_uverbs_get_context_resp resp;
264         struct ib_udata                   udata;
265         struct ib_device                 *ibdev = file->device->ib_dev;
266         struct ib_ucontext               *ucontext;
267         struct file                      *filp;
268         int ret;
269
270         if (out_len < sizeof resp)
271                 return -ENOSPC;
272
273         if (copy_from_user(&cmd, buf, sizeof cmd))
274                 return -EFAULT;
275
276         mutex_lock(&file->mutex);
277
278         if (file->ucontext) {
279                 ret = -EINVAL;
280                 goto err;
281         }
282
283         INIT_UDATA(&udata, buf + sizeof cmd,
284                    (unsigned long) cmd.response + sizeof resp,
285                    in_len - sizeof cmd, out_len - sizeof resp);
286
287         ucontext = ibdev->alloc_ucontext(ibdev, &udata);
288         if (IS_ERR(ucontext)) {
289                 ret = PTR_ERR(ucontext);
290                 goto err;
291         }
292
293         ucontext->device = ibdev;
294         INIT_LIST_HEAD(&ucontext->pd_list);
295         INIT_LIST_HEAD(&ucontext->mr_list);
296         INIT_LIST_HEAD(&ucontext->mw_list);
297         INIT_LIST_HEAD(&ucontext->cq_list);
298         INIT_LIST_HEAD(&ucontext->qp_list);
299         INIT_LIST_HEAD(&ucontext->srq_list);
300         INIT_LIST_HEAD(&ucontext->ah_list);
301         ucontext->closing = 0;
302
303         resp.num_comp_vectors = file->device->num_comp_vectors;
304
305         ret = get_unused_fd();
306         if (ret < 0)
307                 goto err_free;
308         resp.async_fd = ret;
309
310         filp = ib_uverbs_alloc_event_file(file, 1);
311         if (IS_ERR(filp)) {
312                 ret = PTR_ERR(filp);
313                 goto err_fd;
314         }
315
316         if (copy_to_user((void __user *) (unsigned long) cmd.response,
317                          &resp, sizeof resp)) {
318                 ret = -EFAULT;
319                 goto err_file;
320         }
321
322         file->async_file = filp->private_data;
323
324         INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
325                               ib_uverbs_event_handler);
326         ret = ib_register_event_handler(&file->event_handler);
327         if (ret)
328                 goto err_file;
329
330         kref_get(&file->async_file->ref);
331         kref_get(&file->ref);
332         file->ucontext = ucontext;
333
334         fd_install(resp.async_fd, filp);
335
336         mutex_unlock(&file->mutex);
337
338         return in_len;
339
340 err_file:
341         fput(filp);
342
343 err_fd:
344         put_unused_fd(resp.async_fd);
345
346 err_free:
347         ibdev->dealloc_ucontext(ucontext);
348
349 err:
350         mutex_unlock(&file->mutex);
351         return ret;
352 }
353
354 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
355                                const char __user *buf,
356                                int in_len, int out_len)
357 {
358         struct ib_uverbs_query_device      cmd;
359         struct ib_uverbs_query_device_resp resp;
360         struct ib_device_attr              attr;
361         int                                ret;
362
363         if (out_len < sizeof resp)
364                 return -ENOSPC;
365
366         if (copy_from_user(&cmd, buf, sizeof cmd))
367                 return -EFAULT;
368
369         ret = ib_query_device(file->device->ib_dev, &attr);
370         if (ret)
371                 return ret;
372
373         memset(&resp, 0, sizeof resp);
374
375         resp.fw_ver                    = attr.fw_ver;
376         resp.node_guid                 = file->device->ib_dev->node_guid;
377         resp.sys_image_guid            = attr.sys_image_guid;
378         resp.max_mr_size               = attr.max_mr_size;
379         resp.page_size_cap             = attr.page_size_cap;
380         resp.vendor_id                 = attr.vendor_id;
381         resp.vendor_part_id            = attr.vendor_part_id;
382         resp.hw_ver                    = attr.hw_ver;
383         resp.max_qp                    = attr.max_qp;
384         resp.max_qp_wr                 = attr.max_qp_wr;
385         resp.device_cap_flags          = attr.device_cap_flags;
386         resp.max_sge                   = attr.max_sge;
387         resp.max_sge_rd                = attr.max_sge_rd;
388         resp.max_cq                    = attr.max_cq;
389         resp.max_cqe                   = attr.max_cqe;
390         resp.max_mr                    = attr.max_mr;
391         resp.max_pd                    = attr.max_pd;
392         resp.max_qp_rd_atom            = attr.max_qp_rd_atom;
393         resp.max_ee_rd_atom            = attr.max_ee_rd_atom;
394         resp.max_res_rd_atom           = attr.max_res_rd_atom;
395         resp.max_qp_init_rd_atom       = attr.max_qp_init_rd_atom;
396         resp.max_ee_init_rd_atom       = attr.max_ee_init_rd_atom;
397         resp.atomic_cap                = attr.atomic_cap;
398         resp.max_ee                    = attr.max_ee;
399         resp.max_rdd                   = attr.max_rdd;
400         resp.max_mw                    = attr.max_mw;
401         resp.max_raw_ipv6_qp           = attr.max_raw_ipv6_qp;
402         resp.max_raw_ethy_qp           = attr.max_raw_ethy_qp;
403         resp.max_mcast_grp             = attr.max_mcast_grp;
404         resp.max_mcast_qp_attach       = attr.max_mcast_qp_attach;
405         resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
406         resp.max_ah                    = attr.max_ah;
407         resp.max_fmr                   = attr.max_fmr;
408         resp.max_map_per_fmr           = attr.max_map_per_fmr;
409         resp.max_srq                   = attr.max_srq;
410         resp.max_srq_wr                = attr.max_srq_wr;
411         resp.max_srq_sge               = attr.max_srq_sge;
412         resp.max_pkeys                 = attr.max_pkeys;
413         resp.local_ca_ack_delay        = attr.local_ca_ack_delay;
414         resp.phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
415
416         if (copy_to_user((void __user *) (unsigned long) cmd.response,
417                          &resp, sizeof resp))
418                 return -EFAULT;
419
420         return in_len;
421 }
422
423 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
424                              const char __user *buf,
425                              int in_len, int out_len)
426 {
427         struct ib_uverbs_query_port      cmd;
428         struct ib_uverbs_query_port_resp resp;
429         struct ib_port_attr              attr;
430         int                              ret;
431
432         if (out_len < sizeof resp)
433                 return -ENOSPC;
434
435         if (copy_from_user(&cmd, buf, sizeof cmd))
436                 return -EFAULT;
437
438         ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
439         if (ret)
440                 return ret;
441
442         memset(&resp, 0, sizeof resp);
443
444         resp.state           = attr.state;
445         resp.max_mtu         = attr.max_mtu;
446         resp.active_mtu      = attr.active_mtu;
447         resp.gid_tbl_len     = attr.gid_tbl_len;
448         resp.port_cap_flags  = attr.port_cap_flags;
449         resp.max_msg_sz      = attr.max_msg_sz;
450         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
451         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
452         resp.pkey_tbl_len    = attr.pkey_tbl_len;
453         resp.lid             = attr.lid;
454         resp.sm_lid          = attr.sm_lid;
455         resp.lmc             = attr.lmc;
456         resp.max_vl_num      = attr.max_vl_num;
457         resp.sm_sl           = attr.sm_sl;
458         resp.subnet_timeout  = attr.subnet_timeout;
459         resp.init_type_reply = attr.init_type_reply;
460         resp.active_width    = attr.active_width;
461         resp.active_speed    = attr.active_speed;
462         resp.phys_state      = attr.phys_state;
463         resp.link_layer      = rdma_port_get_link_layer(file->device->ib_dev,
464                                                         cmd.port_num);
465
466         if (copy_to_user((void __user *) (unsigned long) cmd.response,
467                          &resp, sizeof resp))
468                 return -EFAULT;
469
470         return in_len;
471 }
472
473 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
474                            const char __user *buf,
475                            int in_len, int out_len)
476 {
477         struct ib_uverbs_alloc_pd      cmd;
478         struct ib_uverbs_alloc_pd_resp resp;
479         struct ib_udata                udata;
480         struct ib_uobject             *uobj;
481         struct ib_pd                  *pd;
482         int                            ret;
483
484         if (out_len < sizeof resp)
485                 return -ENOSPC;
486
487         if (copy_from_user(&cmd, buf, sizeof cmd))
488                 return -EFAULT;
489
490         INIT_UDATA(&udata, buf + sizeof cmd,
491                    (unsigned long) cmd.response + sizeof resp,
492                    in_len - sizeof cmd, out_len - sizeof resp);
493
494         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
495         if (!uobj)
496                 return -ENOMEM;
497
498         init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
499         down_write(&uobj->mutex);
500
501         pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
502                                             file->ucontext, &udata);
503         if (IS_ERR(pd)) {
504                 ret = PTR_ERR(pd);
505                 goto err;
506         }
507
508         pd->device  = file->device->ib_dev;
509         pd->uobject = uobj;
510         atomic_set(&pd->usecnt, 0);
511
512         uobj->object = pd;
513         ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
514         if (ret)
515                 goto err_idr;
516
517         memset(&resp, 0, sizeof resp);
518         resp.pd_handle = uobj->id;
519
520         if (copy_to_user((void __user *) (unsigned long) cmd.response,
521                          &resp, sizeof resp)) {
522                 ret = -EFAULT;
523                 goto err_copy;
524         }
525
526         mutex_lock(&file->mutex);
527         list_add_tail(&uobj->list, &file->ucontext->pd_list);
528         mutex_unlock(&file->mutex);
529
530         uobj->live = 1;
531
532         up_write(&uobj->mutex);
533
534         return in_len;
535
536 err_copy:
537         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
538
539 err_idr:
540         ib_dealloc_pd(pd);
541
542 err:
543         put_uobj_write(uobj);
544         return ret;
545 }
546
547 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
548                              const char __user *buf,
549                              int in_len, int out_len)
550 {
551         struct ib_uverbs_dealloc_pd cmd;
552         struct ib_uobject          *uobj;
553         int                         ret;
554
555         if (copy_from_user(&cmd, buf, sizeof cmd))
556                 return -EFAULT;
557
558         uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
559         if (!uobj)
560                 return -EINVAL;
561
562         ret = ib_dealloc_pd(uobj->object);
563         if (!ret)
564                 uobj->live = 0;
565
566         put_uobj_write(uobj);
567
568         if (ret)
569                 return ret;
570
571         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
572
573         mutex_lock(&file->mutex);
574         list_del(&uobj->list);
575         mutex_unlock(&file->mutex);
576
577         put_uobj(uobj);
578
579         return in_len;
580 }
581
582 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
583                          const char __user *buf, int in_len,
584                          int out_len)
585 {
586         struct ib_uverbs_reg_mr      cmd;
587         struct ib_uverbs_reg_mr_resp resp;
588         struct ib_udata              udata;
589         struct ib_uobject           *uobj;
590         struct ib_pd                *pd;
591         struct ib_mr                *mr;
592         int                          ret;
593
594         if (out_len < sizeof resp)
595                 return -ENOSPC;
596
597         if (copy_from_user(&cmd, buf, sizeof cmd))
598                 return -EFAULT;
599
600         INIT_UDATA(&udata, buf + sizeof cmd,
601                    (unsigned long) cmd.response + sizeof resp,
602                    in_len - sizeof cmd, out_len - sizeof resp);
603
604         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
605                 return -EINVAL;
606
607         /*
608          * Local write permission is required if remote write or
609          * remote atomic permission is also requested.
610          */
611         if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
612             !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
613                 return -EINVAL;
614
615         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
616         if (!uobj)
617                 return -ENOMEM;
618
619         init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
620         down_write(&uobj->mutex);
621
622         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
623         if (!pd) {
624                 ret = -EINVAL;
625                 goto err_free;
626         }
627
628         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
629                                      cmd.access_flags, &udata);
630         if (IS_ERR(mr)) {
631                 ret = PTR_ERR(mr);
632                 goto err_put;
633         }
634
635         mr->device  = pd->device;
636         mr->pd      = pd;
637         mr->uobject = uobj;
638         atomic_inc(&pd->usecnt);
639         atomic_set(&mr->usecnt, 0);
640
641         uobj->object = mr;
642         ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
643         if (ret)
644                 goto err_unreg;
645
646         memset(&resp, 0, sizeof resp);
647         resp.lkey      = mr->lkey;
648         resp.rkey      = mr->rkey;
649         resp.mr_handle = uobj->id;
650
651         if (copy_to_user((void __user *) (unsigned long) cmd.response,
652                          &resp, sizeof resp)) {
653                 ret = -EFAULT;
654                 goto err_copy;
655         }
656
657         put_pd_read(pd);
658
659         mutex_lock(&file->mutex);
660         list_add_tail(&uobj->list, &file->ucontext->mr_list);
661         mutex_unlock(&file->mutex);
662
663         uobj->live = 1;
664
665         up_write(&uobj->mutex);
666
667         return in_len;
668
669 err_copy:
670         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
671
672 err_unreg:
673         ib_dereg_mr(mr);
674
675 err_put:
676         put_pd_read(pd);
677
678 err_free:
679         put_uobj_write(uobj);
680         return ret;
681 }
682
683 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
684                            const char __user *buf, int in_len,
685                            int out_len)
686 {
687         struct ib_uverbs_dereg_mr cmd;
688         struct ib_mr             *mr;
689         struct ib_uobject        *uobj;
690         int                       ret = -EINVAL;
691
692         if (copy_from_user(&cmd, buf, sizeof cmd))
693                 return -EFAULT;
694
695         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
696         if (!uobj)
697                 return -EINVAL;
698
699         mr = uobj->object;
700
701         ret = ib_dereg_mr(mr);
702         if (!ret)
703                 uobj->live = 0;
704
705         put_uobj_write(uobj);
706
707         if (ret)
708                 return ret;
709
710         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
711
712         mutex_lock(&file->mutex);
713         list_del(&uobj->list);
714         mutex_unlock(&file->mutex);
715
716         put_uobj(uobj);
717
718         return in_len;
719 }
720
721 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
722                                       const char __user *buf, int in_len,
723                                       int out_len)
724 {
725         struct ib_uverbs_create_comp_channel       cmd;
726         struct ib_uverbs_create_comp_channel_resp  resp;
727         struct file                               *filp;
728         int ret;
729
730         if (out_len < sizeof resp)
731                 return -ENOSPC;
732
733         if (copy_from_user(&cmd, buf, sizeof cmd))
734                 return -EFAULT;
735
736         ret = get_unused_fd();
737         if (ret < 0)
738                 return ret;
739         resp.fd = ret;
740
741         filp = ib_uverbs_alloc_event_file(file, 0);
742         if (IS_ERR(filp)) {
743                 put_unused_fd(resp.fd);
744                 return PTR_ERR(filp);
745         }
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                                              cmd.comp_vector,
806                                              file->ucontext, &udata);
807         if (IS_ERR(cq)) {
808                 ret = PTR_ERR(cq);
809                 goto err_file;
810         }
811
812         cq->device        = file->device->ib_dev;
813         cq->uobject       = &obj->uobject;
814         cq->comp_handler  = ib_uverbs_comp_handler;
815         cq->event_handler = ib_uverbs_cq_event_handler;
816         cq->cq_context    = ev_file;
817         atomic_set(&cq->usecnt, 0);
818
819         obj->uobject.object = cq;
820         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
821         if (ret)
822                 goto err_free;
823
824         memset(&resp, 0, sizeof resp);
825         resp.cq_handle = obj->uobject.id;
826         resp.cqe       = cq->cqe;
827
828         if (copy_to_user((void __user *) (unsigned long) cmd.response,
829                          &resp, sizeof resp)) {
830                 ret = -EFAULT;
831                 goto err_copy;
832         }
833
834         mutex_lock(&file->mutex);
835         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
836         mutex_unlock(&file->mutex);
837
838         obj->uobject.live = 1;
839
840         up_write(&obj->uobject.mutex);
841
842         return in_len;
843
844 err_copy:
845         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
846
847 err_free:
848         ib_destroy_cq(cq);
849
850 err_file:
851         if (ev_file)
852                 ib_uverbs_release_ucq(file, ev_file, obj);
853
854 err:
855         put_uobj_write(&obj->uobject);
856         return ret;
857 }
858
859 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
860                             const char __user *buf, int in_len,
861                             int out_len)
862 {
863         struct ib_uverbs_resize_cq      cmd;
864         struct ib_uverbs_resize_cq_resp resp;
865         struct ib_udata                 udata;
866         struct ib_cq                    *cq;
867         int                             ret = -EINVAL;
868
869         if (copy_from_user(&cmd, buf, sizeof cmd))
870                 return -EFAULT;
871
872         INIT_UDATA(&udata, buf + sizeof cmd,
873                    (unsigned long) cmd.response + sizeof resp,
874                    in_len - sizeof cmd, out_len - sizeof resp);
875
876         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
877         if (!cq)
878                 return -EINVAL;
879
880         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
881         if (ret)
882                 goto out;
883
884         resp.cqe = cq->cqe;
885
886         if (copy_to_user((void __user *) (unsigned long) cmd.response,
887                          &resp, sizeof resp.cqe))
888                 ret = -EFAULT;
889
890 out:
891         put_cq_read(cq);
892
893         return ret ? ret : in_len;
894 }
895
896 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
897 {
898         struct ib_uverbs_wc tmp;
899
900         tmp.wr_id               = wc->wr_id;
901         tmp.status              = wc->status;
902         tmp.opcode              = wc->opcode;
903         tmp.vendor_err          = wc->vendor_err;
904         tmp.byte_len            = wc->byte_len;
905         tmp.ex.imm_data         = (__u32 __force) wc->ex.imm_data;
906         tmp.qp_num              = wc->qp->qp_num;
907         tmp.src_qp              = wc->src_qp;
908         tmp.wc_flags            = wc->wc_flags;
909         tmp.pkey_index          = wc->pkey_index;
910         tmp.slid                = wc->slid;
911         tmp.sl                  = wc->sl;
912         tmp.dlid_path_bits      = wc->dlid_path_bits;
913         tmp.port_num            = wc->port_num;
914         tmp.reserved            = 0;
915
916         if (copy_to_user(dest, &tmp, sizeof tmp))
917                 return -EFAULT;
918
919         return 0;
920 }
921
922 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
923                           const char __user *buf, int in_len,
924                           int out_len)
925 {
926         struct ib_uverbs_poll_cq       cmd;
927         struct ib_uverbs_poll_cq_resp  resp;
928         u8 __user                     *header_ptr;
929         u8 __user                     *data_ptr;
930         struct ib_cq                  *cq;
931         struct ib_wc                   wc;
932         int                            ret;
933
934         if (copy_from_user(&cmd, buf, sizeof cmd))
935                 return -EFAULT;
936
937         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
938         if (!cq)
939                 return -EINVAL;
940
941         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
942         header_ptr = (void __user *)(unsigned long) cmd.response;
943         data_ptr = header_ptr + sizeof resp;
944
945         memset(&resp, 0, sizeof resp);
946         while (resp.count < cmd.ne) {
947                 ret = ib_poll_cq(cq, 1, &wc);
948                 if (ret < 0)
949                         goto out_put;
950                 if (!ret)
951                         break;
952
953                 ret = copy_wc_to_user(data_ptr, &wc);
954                 if (ret)
955                         goto out_put;
956
957                 data_ptr += sizeof(struct ib_uverbs_wc);
958                 ++resp.count;
959         }
960
961         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
962                 ret = -EFAULT;
963                 goto out_put;
964         }
965
966         ret = in_len;
967
968 out_put:
969         put_cq_read(cq);
970         return ret;
971 }
972
973 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
974                                 const char __user *buf, int in_len,
975                                 int out_len)
976 {
977         struct ib_uverbs_req_notify_cq cmd;
978         struct ib_cq                  *cq;
979
980         if (copy_from_user(&cmd, buf, sizeof cmd))
981                 return -EFAULT;
982
983         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
984         if (!cq)
985                 return -EINVAL;
986
987         ib_req_notify_cq(cq, cmd.solicited_only ?
988                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
989
990         put_cq_read(cq);
991
992         return in_len;
993 }
994
995 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
996                              const char __user *buf, int in_len,
997                              int out_len)
998 {
999         struct ib_uverbs_destroy_cq      cmd;
1000         struct ib_uverbs_destroy_cq_resp resp;
1001         struct ib_uobject               *uobj;
1002         struct ib_cq                    *cq;
1003         struct ib_ucq_object            *obj;
1004         struct ib_uverbs_event_file     *ev_file;
1005         int                              ret = -EINVAL;
1006
1007         if (copy_from_user(&cmd, buf, sizeof cmd))
1008                 return -EFAULT;
1009
1010         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1011         if (!uobj)
1012                 return -EINVAL;
1013         cq      = uobj->object;
1014         ev_file = cq->cq_context;
1015         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1016
1017         ret = ib_destroy_cq(cq);
1018         if (!ret)
1019                 uobj->live = 0;
1020
1021         put_uobj_write(uobj);
1022
1023         if (ret)
1024                 return ret;
1025
1026         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1027
1028         mutex_lock(&file->mutex);
1029         list_del(&uobj->list);
1030         mutex_unlock(&file->mutex);
1031
1032         ib_uverbs_release_ucq(file, ev_file, obj);
1033
1034         memset(&resp, 0, sizeof resp);
1035         resp.comp_events_reported  = obj->comp_events_reported;
1036         resp.async_events_reported = obj->async_events_reported;
1037
1038         put_uobj(uobj);
1039
1040         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1041                          &resp, sizeof resp))
1042                 return -EFAULT;
1043
1044         return in_len;
1045 }
1046
1047 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1048                             const char __user *buf, int in_len,
1049                             int out_len)
1050 {
1051         struct ib_uverbs_create_qp      cmd;
1052         struct ib_uverbs_create_qp_resp resp;
1053         struct ib_udata                 udata;
1054         struct ib_uqp_object           *obj;
1055         struct ib_pd                   *pd;
1056         struct ib_cq                   *scq, *rcq;
1057         struct ib_srq                  *srq;
1058         struct ib_qp                   *qp;
1059         struct ib_qp_init_attr          attr;
1060         int ret;
1061
1062         if (out_len < sizeof resp)
1063                 return -ENOSPC;
1064
1065         if (copy_from_user(&cmd, buf, sizeof cmd))
1066                 return -EFAULT;
1067
1068         INIT_UDATA(&udata, buf + sizeof cmd,
1069                    (unsigned long) cmd.response + sizeof resp,
1070                    in_len - sizeof cmd, out_len - sizeof resp);
1071
1072         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1073         if (!obj)
1074                 return -ENOMEM;
1075
1076         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1077         down_write(&obj->uevent.uobject.mutex);
1078
1079         srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1080         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1081         scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1082         rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1083                 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1084
1085         if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
1086                 ret = -EINVAL;
1087                 goto err_put;
1088         }
1089
1090         attr.event_handler = ib_uverbs_qp_event_handler;
1091         attr.qp_context    = file;
1092         attr.send_cq       = scq;
1093         attr.recv_cq       = rcq;
1094         attr.srq           = srq;
1095         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1096         attr.qp_type       = cmd.qp_type;
1097         attr.create_flags  = 0;
1098
1099         attr.cap.max_send_wr     = cmd.max_send_wr;
1100         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1101         attr.cap.max_send_sge    = cmd.max_send_sge;
1102         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1103         attr.cap.max_inline_data = cmd.max_inline_data;
1104
1105         obj->uevent.events_reported     = 0;
1106         INIT_LIST_HEAD(&obj->uevent.event_list);
1107         INIT_LIST_HEAD(&obj->mcast_list);
1108
1109         qp = pd->device->create_qp(pd, &attr, &udata);
1110         if (IS_ERR(qp)) {
1111                 ret = PTR_ERR(qp);
1112                 goto err_put;
1113         }
1114
1115         qp->device        = pd->device;
1116         qp->pd            = pd;
1117         qp->send_cq       = attr.send_cq;
1118         qp->recv_cq       = attr.recv_cq;
1119         qp->srq           = attr.srq;
1120         qp->uobject       = &obj->uevent.uobject;
1121         qp->event_handler = attr.event_handler;
1122         qp->qp_context    = attr.qp_context;
1123         qp->qp_type       = attr.qp_type;
1124         atomic_inc(&pd->usecnt);
1125         atomic_inc(&attr.send_cq->usecnt);
1126         atomic_inc(&attr.recv_cq->usecnt);
1127         if (attr.srq)
1128                 atomic_inc(&attr.srq->usecnt);
1129
1130         obj->uevent.uobject.object = qp;
1131         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1132         if (ret)
1133                 goto err_destroy;
1134
1135         memset(&resp, 0, sizeof resp);
1136         resp.qpn             = qp->qp_num;
1137         resp.qp_handle       = obj->uevent.uobject.id;
1138         resp.max_recv_sge    = attr.cap.max_recv_sge;
1139         resp.max_send_sge    = attr.cap.max_send_sge;
1140         resp.max_recv_wr     = attr.cap.max_recv_wr;
1141         resp.max_send_wr     = attr.cap.max_send_wr;
1142         resp.max_inline_data = attr.cap.max_inline_data;
1143
1144         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1145                          &resp, sizeof resp)) {
1146                 ret = -EFAULT;
1147                 goto err_copy;
1148         }
1149
1150         put_pd_read(pd);
1151         put_cq_read(scq);
1152         if (rcq != scq)
1153                 put_cq_read(rcq);
1154         if (srq)
1155                 put_srq_read(srq);
1156
1157         mutex_lock(&file->mutex);
1158         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1159         mutex_unlock(&file->mutex);
1160
1161         obj->uevent.uobject.live = 1;
1162
1163         up_write(&obj->uevent.uobject.mutex);
1164
1165         return in_len;
1166
1167 err_copy:
1168         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1169
1170 err_destroy:
1171         ib_destroy_qp(qp);
1172
1173 err_put:
1174         if (pd)
1175                 put_pd_read(pd);
1176         if (scq)
1177                 put_cq_read(scq);
1178         if (rcq && rcq != scq)
1179                 put_cq_read(rcq);
1180         if (srq)
1181                 put_srq_read(srq);
1182
1183         put_uobj_write(&obj->uevent.uobject);
1184         return ret;
1185 }
1186
1187 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1188                            const char __user *buf, int in_len,
1189                            int out_len)
1190 {
1191         struct ib_uverbs_query_qp      cmd;
1192         struct ib_uverbs_query_qp_resp resp;
1193         struct ib_qp                   *qp;
1194         struct ib_qp_attr              *attr;
1195         struct ib_qp_init_attr         *init_attr;
1196         int                            ret;
1197
1198         if (copy_from_user(&cmd, buf, sizeof cmd))
1199                 return -EFAULT;
1200
1201         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1202         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1203         if (!attr || !init_attr) {
1204                 ret = -ENOMEM;
1205                 goto out;
1206         }
1207
1208         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1209         if (!qp) {
1210                 ret = -EINVAL;
1211                 goto out;
1212         }
1213
1214         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1215
1216         put_qp_read(qp);
1217
1218         if (ret)
1219                 goto out;
1220
1221         memset(&resp, 0, sizeof resp);
1222
1223         resp.qp_state               = attr->qp_state;
1224         resp.cur_qp_state           = attr->cur_qp_state;
1225         resp.path_mtu               = attr->path_mtu;
1226         resp.path_mig_state         = attr->path_mig_state;
1227         resp.qkey                   = attr->qkey;
1228         resp.rq_psn                 = attr->rq_psn;
1229         resp.sq_psn                 = attr->sq_psn;
1230         resp.dest_qp_num            = attr->dest_qp_num;
1231         resp.qp_access_flags        = attr->qp_access_flags;
1232         resp.pkey_index             = attr->pkey_index;
1233         resp.alt_pkey_index         = attr->alt_pkey_index;
1234         resp.sq_draining            = attr->sq_draining;
1235         resp.max_rd_atomic          = attr->max_rd_atomic;
1236         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1237         resp.min_rnr_timer          = attr->min_rnr_timer;
1238         resp.port_num               = attr->port_num;
1239         resp.timeout                = attr->timeout;
1240         resp.retry_cnt              = attr->retry_cnt;
1241         resp.rnr_retry              = attr->rnr_retry;
1242         resp.alt_port_num           = attr->alt_port_num;
1243         resp.alt_timeout            = attr->alt_timeout;
1244
1245         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1246         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1247         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1248         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1249         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1250         resp.dest.dlid              = attr->ah_attr.dlid;
1251         resp.dest.sl                = attr->ah_attr.sl;
1252         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1253         resp.dest.static_rate       = attr->ah_attr.static_rate;
1254         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1255         resp.dest.port_num          = attr->ah_attr.port_num;
1256
1257         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1258         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1259         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1260         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1261         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1262         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1263         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1264         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1265         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1266         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1267         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1268
1269         resp.max_send_wr            = init_attr->cap.max_send_wr;
1270         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1271         resp.max_send_sge           = init_attr->cap.max_send_sge;
1272         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1273         resp.max_inline_data        = init_attr->cap.max_inline_data;
1274         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1275
1276         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1277                          &resp, sizeof resp))
1278                 ret = -EFAULT;
1279
1280 out:
1281         kfree(attr);
1282         kfree(init_attr);
1283
1284         return ret ? ret : in_len;
1285 }
1286
1287 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1288                             const char __user *buf, int in_len,
1289                             int out_len)
1290 {
1291         struct ib_uverbs_modify_qp cmd;
1292         struct ib_udata            udata;
1293         struct ib_qp              *qp;
1294         struct ib_qp_attr         *attr;
1295         int                        ret;
1296
1297         if (copy_from_user(&cmd, buf, sizeof cmd))
1298                 return -EFAULT;
1299
1300         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1301                    out_len);
1302
1303         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1304         if (!attr)
1305                 return -ENOMEM;
1306
1307         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1308         if (!qp) {
1309                 ret = -EINVAL;
1310                 goto out;
1311         }
1312
1313         attr->qp_state            = cmd.qp_state;
1314         attr->cur_qp_state        = cmd.cur_qp_state;
1315         attr->path_mtu            = cmd.path_mtu;
1316         attr->path_mig_state      = cmd.path_mig_state;
1317         attr->qkey                = cmd.qkey;
1318         attr->rq_psn              = cmd.rq_psn;
1319         attr->sq_psn              = cmd.sq_psn;
1320         attr->dest_qp_num         = cmd.dest_qp_num;
1321         attr->qp_access_flags     = cmd.qp_access_flags;
1322         attr->pkey_index          = cmd.pkey_index;
1323         attr->alt_pkey_index      = cmd.alt_pkey_index;
1324         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1325         attr->max_rd_atomic       = cmd.max_rd_atomic;
1326         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
1327         attr->min_rnr_timer       = cmd.min_rnr_timer;
1328         attr->port_num            = cmd.port_num;
1329         attr->timeout             = cmd.timeout;
1330         attr->retry_cnt           = cmd.retry_cnt;
1331         attr->rnr_retry           = cmd.rnr_retry;
1332         attr->alt_port_num        = cmd.alt_port_num;
1333         attr->alt_timeout         = cmd.alt_timeout;
1334
1335         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1336         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1337         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1338         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1339         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1340         attr->ah_attr.dlid                  = cmd.dest.dlid;
1341         attr->ah_attr.sl                    = cmd.dest.sl;
1342         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1343         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1344         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1345         attr->ah_attr.port_num              = cmd.dest.port_num;
1346
1347         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1348         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1349         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1350         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1351         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1352         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1353         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1354         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1355         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1356         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1357         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1358
1359         ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1360
1361         put_qp_read(qp);
1362
1363         if (ret)
1364                 goto out;
1365
1366         ret = in_len;
1367
1368 out:
1369         kfree(attr);
1370
1371         return ret;
1372 }
1373
1374 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1375                              const char __user *buf, int in_len,
1376                              int out_len)
1377 {
1378         struct ib_uverbs_destroy_qp      cmd;
1379         struct ib_uverbs_destroy_qp_resp resp;
1380         struct ib_uobject               *uobj;
1381         struct ib_qp                    *qp;
1382         struct ib_uqp_object            *obj;
1383         int                              ret = -EINVAL;
1384
1385         if (copy_from_user(&cmd, buf, sizeof cmd))
1386                 return -EFAULT;
1387
1388         memset(&resp, 0, sizeof resp);
1389
1390         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1391         if (!uobj)
1392                 return -EINVAL;
1393         qp  = uobj->object;
1394         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1395
1396         if (!list_empty(&obj->mcast_list)) {
1397                 put_uobj_write(uobj);
1398                 return -EBUSY;
1399         }
1400
1401         ret = ib_destroy_qp(qp);
1402         if (!ret)
1403                 uobj->live = 0;
1404
1405         put_uobj_write(uobj);
1406
1407         if (ret)
1408                 return ret;
1409
1410         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1411
1412         mutex_lock(&file->mutex);
1413         list_del(&uobj->list);
1414         mutex_unlock(&file->mutex);
1415
1416         ib_uverbs_release_uevent(file, &obj->uevent);
1417
1418         resp.events_reported = obj->uevent.events_reported;
1419
1420         put_uobj(uobj);
1421
1422         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1423                          &resp, sizeof resp))
1424                 return -EFAULT;
1425
1426         return in_len;
1427 }
1428
1429 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1430                             const char __user *buf, int in_len,
1431                             int out_len)
1432 {
1433         struct ib_uverbs_post_send      cmd;
1434         struct ib_uverbs_post_send_resp resp;
1435         struct ib_uverbs_send_wr       *user_wr;
1436         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1437         struct ib_qp                   *qp;
1438         int                             i, sg_ind;
1439         int                             is_ud;
1440         ssize_t                         ret = -EINVAL;
1441
1442         if (copy_from_user(&cmd, buf, sizeof cmd))
1443                 return -EFAULT;
1444
1445         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1446             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1447                 return -EINVAL;
1448
1449         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1450                 return -EINVAL;
1451
1452         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1453         if (!user_wr)
1454                 return -ENOMEM;
1455
1456         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1457         if (!qp)
1458                 goto out;
1459
1460         is_ud = qp->qp_type == IB_QPT_UD;
1461         sg_ind = 0;
1462         last = NULL;
1463         for (i = 0; i < cmd.wr_count; ++i) {
1464                 if (copy_from_user(user_wr,
1465                                    buf + sizeof cmd + i * cmd.wqe_size,
1466                                    cmd.wqe_size)) {
1467                         ret = -EFAULT;
1468                         goto out_put;
1469                 }
1470
1471                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1472                         ret = -EINVAL;
1473                         goto out_put;
1474                 }
1475
1476                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1477                                user_wr->num_sge * sizeof (struct ib_sge),
1478                                GFP_KERNEL);
1479                 if (!next) {
1480                         ret = -ENOMEM;
1481                         goto out_put;
1482                 }
1483
1484                 if (!last)
1485                         wr = next;
1486                 else
1487                         last->next = next;
1488                 last = next;
1489
1490                 next->next       = NULL;
1491                 next->wr_id      = user_wr->wr_id;
1492                 next->num_sge    = user_wr->num_sge;
1493                 next->opcode     = user_wr->opcode;
1494                 next->send_flags = user_wr->send_flags;
1495
1496                 if (is_ud) {
1497                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1498                                                      file->ucontext);
1499                         if (!next->wr.ud.ah) {
1500                                 ret = -EINVAL;
1501                                 goto out_put;
1502                         }
1503                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1504                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1505                 } else {
1506                         switch (next->opcode) {
1507                         case IB_WR_RDMA_WRITE_WITH_IMM:
1508                                 next->ex.imm_data =
1509                                         (__be32 __force) user_wr->ex.imm_data;
1510                         case IB_WR_RDMA_WRITE:
1511                         case IB_WR_RDMA_READ:
1512                                 next->wr.rdma.remote_addr =
1513                                         user_wr->wr.rdma.remote_addr;
1514                                 next->wr.rdma.rkey        =
1515                                         user_wr->wr.rdma.rkey;
1516                                 break;
1517                         case IB_WR_SEND_WITH_IMM:
1518                                 next->ex.imm_data =
1519                                         (__be32 __force) user_wr->ex.imm_data;
1520                                 break;
1521                         case IB_WR_SEND_WITH_INV:
1522                                 next->ex.invalidate_rkey =
1523                                         user_wr->ex.invalidate_rkey;
1524                                 break;
1525                         case IB_WR_ATOMIC_CMP_AND_SWP:
1526                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1527                                 next->wr.atomic.remote_addr =
1528                                         user_wr->wr.atomic.remote_addr;
1529                                 next->wr.atomic.compare_add =
1530                                         user_wr->wr.atomic.compare_add;
1531                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1532                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1533                                 break;
1534                         default:
1535                                 break;
1536                         }
1537                 }
1538
1539                 if (next->num_sge) {
1540                         next->sg_list = (void *) next +
1541                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1542                         if (copy_from_user(next->sg_list,
1543                                            buf + sizeof cmd +
1544                                            cmd.wr_count * cmd.wqe_size +
1545                                            sg_ind * sizeof (struct ib_sge),
1546                                            next->num_sge * sizeof (struct ib_sge))) {
1547                                 ret = -EFAULT;
1548                                 goto out_put;
1549                         }
1550                         sg_ind += next->num_sge;
1551                 } else
1552                         next->sg_list = NULL;
1553         }
1554
1555         resp.bad_wr = 0;
1556         ret = qp->device->post_send(qp, wr, &bad_wr);
1557         if (ret)
1558                 for (next = wr; next; next = next->next) {
1559                         ++resp.bad_wr;
1560                         if (next == bad_wr)
1561                                 break;
1562                 }
1563
1564         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1565                          &resp, sizeof resp))
1566                 ret = -EFAULT;
1567
1568 out_put:
1569         put_qp_read(qp);
1570
1571         while (wr) {
1572                 if (is_ud && wr->wr.ud.ah)
1573                         put_ah_read(wr->wr.ud.ah);
1574                 next = wr->next;
1575                 kfree(wr);
1576                 wr = next;
1577         }
1578
1579 out:
1580         kfree(user_wr);
1581
1582         return ret ? ret : in_len;
1583 }
1584
1585 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1586                                                     int in_len,
1587                                                     u32 wr_count,
1588                                                     u32 sge_count,
1589                                                     u32 wqe_size)
1590 {
1591         struct ib_uverbs_recv_wr *user_wr;
1592         struct ib_recv_wr        *wr = NULL, *last, *next;
1593         int                       sg_ind;
1594         int                       i;
1595         int                       ret;
1596
1597         if (in_len < wqe_size * wr_count +
1598             sge_count * sizeof (struct ib_uverbs_sge))
1599                 return ERR_PTR(-EINVAL);
1600
1601         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1602                 return ERR_PTR(-EINVAL);
1603
1604         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1605         if (!user_wr)
1606                 return ERR_PTR(-ENOMEM);
1607
1608         sg_ind = 0;
1609         last = NULL;
1610         for (i = 0; i < wr_count; ++i) {
1611                 if (copy_from_user(user_wr, buf + i * wqe_size,
1612                                    wqe_size)) {
1613                         ret = -EFAULT;
1614                         goto err;
1615                 }
1616
1617                 if (user_wr->num_sge + sg_ind > sge_count) {
1618                         ret = -EINVAL;
1619                         goto err;
1620                 }
1621
1622                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1623                                user_wr->num_sge * sizeof (struct ib_sge),
1624                                GFP_KERNEL);
1625                 if (!next) {
1626                         ret = -ENOMEM;
1627                         goto err;
1628                 }
1629
1630                 if (!last)
1631                         wr = next;
1632                 else
1633                         last->next = next;
1634                 last = next;
1635
1636                 next->next       = NULL;
1637                 next->wr_id      = user_wr->wr_id;
1638                 next->num_sge    = user_wr->num_sge;
1639
1640                 if (next->num_sge) {
1641                         next->sg_list = (void *) next +
1642                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1643                         if (copy_from_user(next->sg_list,
1644                                            buf + wr_count * wqe_size +
1645                                            sg_ind * sizeof (struct ib_sge),
1646                                            next->num_sge * sizeof (struct ib_sge))) {
1647                                 ret = -EFAULT;
1648                                 goto err;
1649                         }
1650                         sg_ind += next->num_sge;
1651                 } else
1652                         next->sg_list = NULL;
1653         }
1654
1655         kfree(user_wr);
1656         return wr;
1657
1658 err:
1659         kfree(user_wr);
1660
1661         while (wr) {
1662                 next = wr->next;
1663                 kfree(wr);
1664                 wr = next;
1665         }
1666
1667         return ERR_PTR(ret);
1668 }
1669
1670 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1671                             const char __user *buf, int in_len,
1672                             int out_len)
1673 {
1674         struct ib_uverbs_post_recv      cmd;
1675         struct ib_uverbs_post_recv_resp resp;
1676         struct ib_recv_wr              *wr, *next, *bad_wr;
1677         struct ib_qp                   *qp;
1678         ssize_t                         ret = -EINVAL;
1679
1680         if (copy_from_user(&cmd, buf, sizeof cmd))
1681                 return -EFAULT;
1682
1683         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1684                                        in_len - sizeof cmd, cmd.wr_count,
1685                                        cmd.sge_count, cmd.wqe_size);
1686         if (IS_ERR(wr))
1687                 return PTR_ERR(wr);
1688
1689         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1690         if (!qp)
1691                 goto out;
1692
1693         resp.bad_wr = 0;
1694         ret = qp->device->post_recv(qp, wr, &bad_wr);
1695
1696         put_qp_read(qp);
1697
1698         if (ret)
1699                 for (next = wr; next; next = next->next) {
1700                         ++resp.bad_wr;
1701                         if (next == bad_wr)
1702                                 break;
1703                 }
1704
1705         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1706                          &resp, sizeof resp))
1707                 ret = -EFAULT;
1708
1709 out:
1710         while (wr) {
1711                 next = wr->next;
1712                 kfree(wr);
1713                 wr = next;
1714         }
1715
1716         return ret ? ret : in_len;
1717 }
1718
1719 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1720                                 const char __user *buf, int in_len,
1721                                 int out_len)
1722 {
1723         struct ib_uverbs_post_srq_recv      cmd;
1724         struct ib_uverbs_post_srq_recv_resp resp;
1725         struct ib_recv_wr                  *wr, *next, *bad_wr;
1726         struct ib_srq                      *srq;
1727         ssize_t                             ret = -EINVAL;
1728
1729         if (copy_from_user(&cmd, buf, sizeof cmd))
1730                 return -EFAULT;
1731
1732         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1733                                        in_len - sizeof cmd, cmd.wr_count,
1734                                        cmd.sge_count, cmd.wqe_size);
1735         if (IS_ERR(wr))
1736                 return PTR_ERR(wr);
1737
1738         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1739         if (!srq)
1740                 goto out;
1741
1742         resp.bad_wr = 0;
1743         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1744
1745         put_srq_read(srq);
1746
1747         if (ret)
1748                 for (next = wr; next; next = next->next) {
1749                         ++resp.bad_wr;
1750                         if (next == bad_wr)
1751                                 break;
1752                 }
1753
1754         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1755                          &resp, sizeof resp))
1756                 ret = -EFAULT;
1757
1758 out:
1759         while (wr) {
1760                 next = wr->next;
1761                 kfree(wr);
1762                 wr = next;
1763         }
1764
1765         return ret ? ret : in_len;
1766 }
1767
1768 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1769                             const char __user *buf, int in_len,
1770                             int out_len)
1771 {
1772         struct ib_uverbs_create_ah       cmd;
1773         struct ib_uverbs_create_ah_resp  resp;
1774         struct ib_uobject               *uobj;
1775         struct ib_pd                    *pd;
1776         struct ib_ah                    *ah;
1777         struct ib_ah_attr               attr;
1778         int ret;
1779
1780         if (out_len < sizeof resp)
1781                 return -ENOSPC;
1782
1783         if (copy_from_user(&cmd, buf, sizeof cmd))
1784                 return -EFAULT;
1785
1786         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1787         if (!uobj)
1788                 return -ENOMEM;
1789
1790         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1791         down_write(&uobj->mutex);
1792
1793         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1794         if (!pd) {
1795                 ret = -EINVAL;
1796                 goto err;
1797         }
1798
1799         attr.dlid              = cmd.attr.dlid;
1800         attr.sl                = cmd.attr.sl;
1801         attr.src_path_bits     = cmd.attr.src_path_bits;
1802         attr.static_rate       = cmd.attr.static_rate;
1803         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1804         attr.port_num          = cmd.attr.port_num;
1805         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1806         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1807         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1808         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1809         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1810
1811         ah = ib_create_ah(pd, &attr);
1812         if (IS_ERR(ah)) {
1813                 ret = PTR_ERR(ah);
1814                 goto err_put;
1815         }
1816
1817         ah->uobject  = uobj;
1818         uobj->object = ah;
1819
1820         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1821         if (ret)
1822                 goto err_destroy;
1823
1824         resp.ah_handle = uobj->id;
1825
1826         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1827                          &resp, sizeof resp)) {
1828                 ret = -EFAULT;
1829                 goto err_copy;
1830         }
1831
1832         put_pd_read(pd);
1833
1834         mutex_lock(&file->mutex);
1835         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1836         mutex_unlock(&file->mutex);
1837
1838         uobj->live = 1;
1839
1840         up_write(&uobj->mutex);
1841
1842         return in_len;
1843
1844 err_copy:
1845         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1846
1847 err_destroy:
1848         ib_destroy_ah(ah);
1849
1850 err_put:
1851         put_pd_read(pd);
1852
1853 err:
1854         put_uobj_write(uobj);
1855         return ret;
1856 }
1857
1858 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1859                              const char __user *buf, int in_len, int out_len)
1860 {
1861         struct ib_uverbs_destroy_ah cmd;
1862         struct ib_ah               *ah;
1863         struct ib_uobject          *uobj;
1864         int                         ret;
1865
1866         if (copy_from_user(&cmd, buf, sizeof cmd))
1867                 return -EFAULT;
1868
1869         uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1870         if (!uobj)
1871                 return -EINVAL;
1872         ah = uobj->object;
1873
1874         ret = ib_destroy_ah(ah);
1875         if (!ret)
1876                 uobj->live = 0;
1877
1878         put_uobj_write(uobj);
1879
1880         if (ret)
1881                 return ret;
1882
1883         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1884
1885         mutex_lock(&file->mutex);
1886         list_del(&uobj->list);
1887         mutex_unlock(&file->mutex);
1888
1889         put_uobj(uobj);
1890
1891         return in_len;
1892 }
1893
1894 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1895                                const char __user *buf, int in_len,
1896                                int out_len)
1897 {
1898         struct ib_uverbs_attach_mcast cmd;
1899         struct ib_qp                 *qp;
1900         struct ib_uqp_object         *obj;
1901         struct ib_uverbs_mcast_entry *mcast;
1902         int                           ret;
1903
1904         if (copy_from_user(&cmd, buf, sizeof cmd))
1905                 return -EFAULT;
1906
1907         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1908         if (!qp)
1909                 return -EINVAL;
1910
1911         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1912
1913         list_for_each_entry(mcast, &obj->mcast_list, list)
1914                 if (cmd.mlid == mcast->lid &&
1915                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1916                         ret = 0;
1917                         goto out_put;
1918                 }
1919
1920         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1921         if (!mcast) {
1922                 ret = -ENOMEM;
1923                 goto out_put;
1924         }
1925
1926         mcast->lid = cmd.mlid;
1927         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1928
1929         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1930         if (!ret)
1931                 list_add_tail(&mcast->list, &obj->mcast_list);
1932         else
1933                 kfree(mcast);
1934
1935 out_put:
1936         put_qp_read(qp);
1937
1938         return ret ? ret : in_len;
1939 }
1940
1941 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1942                                const char __user *buf, int in_len,
1943                                int out_len)
1944 {
1945         struct ib_uverbs_detach_mcast cmd;
1946         struct ib_uqp_object         *obj;
1947         struct ib_qp                 *qp;
1948         struct ib_uverbs_mcast_entry *mcast;
1949         int                           ret = -EINVAL;
1950
1951         if (copy_from_user(&cmd, buf, sizeof cmd))
1952                 return -EFAULT;
1953
1954         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1955         if (!qp)
1956                 return -EINVAL;
1957
1958         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1959         if (ret)
1960                 goto out_put;
1961
1962         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1963
1964         list_for_each_entry(mcast, &obj->mcast_list, list)
1965                 if (cmd.mlid == mcast->lid &&
1966                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1967                         list_del(&mcast->list);
1968                         kfree(mcast);
1969                         break;
1970                 }
1971
1972 out_put:
1973         put_qp_read(qp);
1974
1975         return ret ? ret : in_len;
1976 }
1977
1978 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1979                              const char __user *buf, int in_len,
1980                              int out_len)
1981 {
1982         struct ib_uverbs_create_srq      cmd;
1983         struct ib_uverbs_create_srq_resp resp;
1984         struct ib_udata                  udata;
1985         struct ib_uevent_object         *obj;
1986         struct ib_pd                    *pd;
1987         struct ib_srq                   *srq;
1988         struct ib_srq_init_attr          attr;
1989         int ret;
1990
1991         if (out_len < sizeof resp)
1992                 return -ENOSPC;
1993
1994         if (copy_from_user(&cmd, buf, sizeof cmd))
1995                 return -EFAULT;
1996
1997         INIT_UDATA(&udata, buf + sizeof cmd,
1998                    (unsigned long) cmd.response + sizeof resp,
1999                    in_len - sizeof cmd, out_len - sizeof resp);
2000
2001         obj = kmalloc(sizeof *obj, GFP_KERNEL);
2002         if (!obj)
2003                 return -ENOMEM;
2004
2005         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
2006         down_write(&obj->uobject.mutex);
2007
2008         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
2009         if (!pd) {
2010                 ret = -EINVAL;
2011                 goto err;
2012         }
2013
2014         attr.event_handler  = ib_uverbs_srq_event_handler;
2015         attr.srq_context    = file;
2016         attr.srq_type       = IB_SRQT_BASIC;
2017         attr.attr.max_wr    = cmd.max_wr;
2018         attr.attr.max_sge   = cmd.max_sge;
2019         attr.attr.srq_limit = cmd.srq_limit;
2020
2021         obj->events_reported     = 0;
2022         INIT_LIST_HEAD(&obj->event_list);
2023
2024         srq = pd->device->create_srq(pd, &attr, &udata);
2025         if (IS_ERR(srq)) {
2026                 ret = PTR_ERR(srq);
2027                 goto err_put;
2028         }
2029
2030         srq->device        = pd->device;
2031         srq->pd            = pd;
2032         srq->uobject       = &obj->uobject;
2033         srq->event_handler = attr.event_handler;
2034         srq->srq_context   = attr.srq_context;
2035         atomic_inc(&pd->usecnt);
2036         atomic_set(&srq->usecnt, 0);
2037
2038         obj->uobject.object = srq;
2039         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2040         if (ret)
2041                 goto err_destroy;
2042
2043         memset(&resp, 0, sizeof resp);
2044         resp.srq_handle = obj->uobject.id;
2045         resp.max_wr     = attr.attr.max_wr;
2046         resp.max_sge    = attr.attr.max_sge;
2047
2048         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2049                          &resp, sizeof resp)) {
2050                 ret = -EFAULT;
2051                 goto err_copy;
2052         }
2053
2054         put_pd_read(pd);
2055
2056         mutex_lock(&file->mutex);
2057         list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2058         mutex_unlock(&file->mutex);
2059
2060         obj->uobject.live = 1;
2061
2062         up_write(&obj->uobject.mutex);
2063
2064         return in_len;
2065
2066 err_copy:
2067         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2068
2069 err_destroy:
2070         ib_destroy_srq(srq);
2071
2072 err_put:
2073         put_pd_read(pd);
2074
2075 err:
2076         put_uobj_write(&obj->uobject);
2077         return ret;
2078 }
2079
2080 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2081                              const char __user *buf, int in_len,
2082                              int out_len)
2083 {
2084         struct ib_uverbs_modify_srq cmd;
2085         struct ib_udata             udata;
2086         struct ib_srq              *srq;
2087         struct ib_srq_attr          attr;
2088         int                         ret;
2089
2090         if (copy_from_user(&cmd, buf, sizeof cmd))
2091                 return -EFAULT;
2092
2093         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2094                    out_len);
2095
2096         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2097         if (!srq)
2098                 return -EINVAL;
2099
2100         attr.max_wr    = cmd.max_wr;
2101         attr.srq_limit = cmd.srq_limit;
2102
2103         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2104
2105         put_srq_read(srq);
2106
2107         return ret ? ret : in_len;
2108 }
2109
2110 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2111                             const char __user *buf,
2112                             int in_len, int out_len)
2113 {
2114         struct ib_uverbs_query_srq      cmd;
2115         struct ib_uverbs_query_srq_resp resp;
2116         struct ib_srq_attr              attr;
2117         struct ib_srq                   *srq;
2118         int                             ret;
2119
2120         if (out_len < sizeof resp)
2121                 return -ENOSPC;
2122
2123         if (copy_from_user(&cmd, buf, sizeof cmd))
2124                 return -EFAULT;
2125
2126         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2127         if (!srq)
2128                 return -EINVAL;
2129
2130         ret = ib_query_srq(srq, &attr);
2131
2132         put_srq_read(srq);
2133
2134         if (ret)
2135                 return ret;
2136
2137         memset(&resp, 0, sizeof resp);
2138
2139         resp.max_wr    = attr.max_wr;
2140         resp.max_sge   = attr.max_sge;
2141         resp.srq_limit = attr.srq_limit;
2142
2143         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2144                          &resp, sizeof resp))
2145                 return -EFAULT;
2146
2147         return in_len;
2148 }
2149
2150 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2151                               const char __user *buf, int in_len,
2152                               int out_len)
2153 {
2154         struct ib_uverbs_destroy_srq      cmd;
2155         struct ib_uverbs_destroy_srq_resp resp;
2156         struct ib_uobject                *uobj;
2157         struct ib_srq                    *srq;
2158         struct ib_uevent_object          *obj;
2159         int                               ret = -EINVAL;
2160
2161         if (copy_from_user(&cmd, buf, sizeof cmd))
2162                 return -EFAULT;
2163
2164         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2165         if (!uobj)
2166                 return -EINVAL;
2167         srq = uobj->object;
2168         obj = container_of(uobj, struct ib_uevent_object, uobject);
2169
2170         ret = ib_destroy_srq(srq);
2171         if (!ret)
2172                 uobj->live = 0;
2173
2174         put_uobj_write(uobj);
2175
2176         if (ret)
2177                 return ret;
2178
2179         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2180
2181         mutex_lock(&file->mutex);
2182         list_del(&uobj->list);
2183         mutex_unlock(&file->mutex);
2184
2185         ib_uverbs_release_uevent(file, obj);
2186
2187         memset(&resp, 0, sizeof resp);
2188         resp.events_reported = obj->events_reported;
2189
2190         put_uobj(uobj);
2191
2192         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2193                          &resp, sizeof resp))
2194                 ret = -EFAULT;
2195
2196         return ret ? ret : in_len;
2197 }