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