projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
IB/core: Add user MR re-registration support
[linux-2.6-block.git] / drivers / infiniband / core / uverbs_cmd.c
CommitLineData
bc38a6ab
RD		 1/*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
f7c6a7b5 3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
eb9d3cd5 4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
8bdb0e86 5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
bc38a6ab
RD		 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.
bc38a6ab
RD		 34 */
35
6b73597e 36#include <linux/file.h>
70a30e16 37#include <linux/fs.h>
5a0e3ad6 38#include <linux/slab.h>
6b73597e 39
bc38a6ab
RD		 40#include <asm/uaccess.h>
41
42#include "uverbs.h"
ed4c54e5 43#include "core_priv.h"
bc38a6ab 44
3bea57a5
RD		 45struct uverbs_lock_class {
46 struct lock_class_key key;
47 char name[16];
48};
49
50static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" };
51static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" };
6b52a12b 52static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" };
3bea57a5
RD		 53static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" };
54static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" };
55static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" };
56static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" };
57static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
436f2ad0 58static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" };
bc38a6ab 59
9ead190b
RD		 60/*
61 * The ib_uobject locking scheme is as follows:
62 *
63 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
64 * needs to be held during all idr operations. When an object is
65 * looked up, a reference must be taken on the object's kref before
66 * dropping this lock.
67 *
68 * - Each object also has an rwsem. This rwsem must be held for
69 * reading while an operation that uses the object is performed.
70 * For example, while registering an MR, the associated PD's
71 * uobject.mutex must be held for reading. The rwsem must be held
72 * for writing while initializing or destroying an object.
73 *
74 * - In addition, each object has a "live" flag. If this flag is not
75 * set, then lookups of the object will fail even if it is found in
76 * the idr. This handles a reader that blocks and does not acquire
77 * the rwsem until after the object is destroyed. The destroy
78 * operation will set the live flag to 0 and then drop the rwsem;
79 * this will allow the reader to acquire the rwsem, see that the
80 * live flag is 0, and then drop the rwsem and its reference to
81 * object. The underlying storage will not be freed until the last
82 * reference to the object is dropped.
83 */
84
85static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
3bea57a5 86 struct ib_ucontext *context, struct uverbs_lock_class *c)
9ead190b
RD		 87{
88 uobj->user_handle = user_handle;
89 uobj->context = context;
90 kref_init(&uobj->ref);
91 init_rwsem(&uobj->mutex);
3bea57a5 92 lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
9ead190b
RD		 93 uobj->live = 0;
94}
95
96static void release_uobj(struct kref *kref)
97{
98 kfree(container_of(kref, struct ib_uobject, ref));
99}
100
101static void put_uobj(struct ib_uobject *uobj)
102{
103 kref_put(&uobj->ref, release_uobj);
104}
105
106static void put_uobj_read(struct ib_uobject *uobj)
107{
108 up_read(&uobj->mutex);
109 put_uobj(uobj);
110}
111
112static void put_uobj_write(struct ib_uobject *uobj)
113{
114 up_write(&uobj->mutex);
115 put_uobj(uobj);
116}
117
118static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
3463175d
RD		 119{
120 int ret;
121
3b069c5d 122 idr_preload(GFP_KERNEL);
9ead190b 123 spin_lock(&ib_uverbs_idr_lock);
3463175d 124
3b069c5d
TH		 125 ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT);
126 if (ret >= 0)
127 uobj->id = ret;
128
129 spin_unlock(&ib_uverbs_idr_lock);
130 idr_preload_end();
3463175d 131
3b069c5d 132 return ret < 0 ? ret : 0;
3463175d
RD		 133}
134
9ead190b
RD		 135void 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
142static 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);
cbfb50e6
RD		 149 if (uobj) {
150 if (uobj->context == context)
151 kref_get(&uobj->ref);
152 else
153 uobj = NULL;
154 }
9ead190b
RD		 155 spin_unlock(&ib_uverbs_idr_lock);
156
157 return uobj;
158}
159
160static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
1ccf6aa1 161 struct ib_ucontext *context, int nested)
9ead190b
RD		 162{
163 struct ib_uobject *uobj;
164
165 uobj = __idr_get_uobj(idr, id, context);
166 if (!uobj)
167 return NULL;
168
1ccf6aa1
RD		 169 if (nested)
170 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
171 else
172 down_read(&uobj->mutex);
9ead190b
RD		 173 if (!uobj->live) {
174 put_uobj_read(uobj);
175 return NULL;
176 }
177
178 return uobj;
179}
180
181static 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
1ccf6aa1
RD		 199static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
200 int nested)
9ead190b
RD		 201{
202 struct ib_uobject *uobj;
203
1ccf6aa1 204 uobj = idr_read_uobj(idr, id, context, nested);
9ead190b
RD		 205 return uobj ? uobj->object : NULL;
206}
207
208static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
209{
1ccf6aa1 210 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
9ead190b
RD		 211}
212
213static void put_pd_read(struct ib_pd *pd)
214{
215 put_uobj_read(pd->uobject);
216}
217
1ccf6aa1 218static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
9ead190b 219{
1ccf6aa1 220 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
9ead190b
RD		 221}
222
223static void put_cq_read(struct ib_cq *cq)
224{
225 put_uobj_read(cq->uobject);
226}
227
228static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
229{
1ccf6aa1 230 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
9ead190b
RD		 231}
232
233static void put_ah_read(struct ib_ah *ah)
234{
235 put_uobj_read(ah->uobject);
236}
237
238static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
239{
1ccf6aa1 240 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
9ead190b
RD		 241}
242
e214a0fe
EC		 243static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context)
244{
245 struct ib_uobject *uobj;
246
247 uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context);
248 return uobj ? uobj->object : NULL;
249}
250
9ead190b
RD		 251static void put_qp_read(struct ib_qp *qp)
252{
253 put_uobj_read(qp->uobject);
254}
255
e214a0fe
EC		 256static void put_qp_write(struct ib_qp *qp)
257{
258 put_uobj_write(qp->uobject);
259}
260
9ead190b
RD		 261static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
262{
1ccf6aa1 263 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
9ead190b
RD		 264}
265
266static void put_srq_read(struct ib_srq *srq)
267{
268 put_uobj_read(srq->uobject);
269}
270
53d0bd1e
SH		 271static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
272 struct ib_uobject **uobj)
273{
274 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
275 return *uobj ? (*uobj)->object : NULL;
276}
277
278static void put_xrcd_read(struct ib_uobject *uobj)
279{
280 put_uobj_read(uobj);
281}
282
bc38a6ab
RD		 283ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
284 const char __user *buf,
285 int in_len, int out_len)
286{
287 struct ib_uverbs_get_context cmd;
288 struct ib_uverbs_get_context_resp resp;
289 struct ib_udata udata;
290 struct ib_device *ibdev = file->device->ib_dev;
63c47c28 291 struct ib_ucontext *ucontext;
6b73597e 292 struct file *filp;
63c47c28 293 int ret;
bc38a6ab
RD		 294
295 if (out_len < sizeof resp)
296 return -ENOSPC;
297
298 if (copy_from_user(&cmd, buf, sizeof cmd))
299 return -EFAULT;
300
95ed644f 301 mutex_lock(&file->mutex);
63c47c28
RD		 302
303 if (file->ucontext) {
304 ret = -EINVAL;
305 goto err;
306 }
307
bc38a6ab
RD		 308 INIT_UDATA(&udata, buf + sizeof cmd,
309 (unsigned long) cmd.response + sizeof resp,
310 in_len - sizeof cmd, out_len - sizeof resp);
311
63c47c28 312 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
77f76013 313 if (IS_ERR(ucontext)) {
df42245a 314 ret = PTR_ERR(ucontext);
77f76013
GC		 315 goto err;
316 }
bc38a6ab 317
63c47c28
RD		 318 ucontext->device = ibdev;
319 INIT_LIST_HEAD(&ucontext->pd_list);
320 INIT_LIST_HEAD(&ucontext->mr_list);
321 INIT_LIST_HEAD(&ucontext->mw_list);
322 INIT_LIST_HEAD(&ucontext->cq_list);
323 INIT_LIST_HEAD(&ucontext->qp_list);
324 INIT_LIST_HEAD(&ucontext->srq_list);
325 INIT_LIST_HEAD(&ucontext->ah_list);
53d0bd1e 326 INIT_LIST_HEAD(&ucontext->xrcd_list);
436f2ad0 327 INIT_LIST_HEAD(&ucontext->rule_list);
f7c6a7b5 328 ucontext->closing = 0;
bc38a6ab 329
6b73597e
RD		 330 resp.num_comp_vectors = file->device->num_comp_vectors;
331
da183c7a 332 ret = get_unused_fd_flags(O_CLOEXEC);
b1e4594b
AV		 333 if (ret < 0)
334 goto err_free;
335 resp.async_fd = ret;
336
337 filp = ib_uverbs_alloc_event_file(file, 1);
6b73597e
RD		 338 if (IS_ERR(filp)) {
339 ret = PTR_ERR(filp);
b1e4594b 340 goto err_fd;
6b73597e 341 }
bc38a6ab
RD		 342
343 if (copy_to_user((void __user *) (unsigned long) cmd.response,
63c47c28
RD		 344 &resp, sizeof resp)) {
345 ret = -EFAULT;
6b73597e 346 goto err_file;
63c47c28
RD		 347 }
348
6b73597e
RD		 349 file->async_file = filp->private_data;
350
351 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
352 ib_uverbs_event_handler);
353 ret = ib_register_event_handler(&file->event_handler);
354 if (ret)
355 goto err_file;
356
357 kref_get(&file->async_file->ref);
358 kref_get(&file->ref);
70a30e16 359 file->ucontext = ucontext;
6b73597e
RD		 360
361 fd_install(resp.async_fd, filp);
362
95ed644f 363 mutex_unlock(&file->mutex);
bc38a6ab
RD		 364
365 return in_len;
366
6b73597e 367err_file:
6b73597e
RD		 368 fput(filp);
369
b1e4594b
AV		 370err_fd:
371 put_unused_fd(resp.async_fd);
372
63c47c28
RD		 373err_free:
374 ibdev->dealloc_ucontext(ucontext);
bc38a6ab 375
63c47c28 376err:
95ed644f 377 mutex_unlock(&file->mutex);
63c47c28 378 return ret;
bc38a6ab
RD		 379}
380
381ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
382 const char __user *buf,
383 int in_len, int out_len)
384{
385 struct ib_uverbs_query_device cmd;
386 struct ib_uverbs_query_device_resp resp;
387 struct ib_device_attr attr;
388 int ret;
389
390 if (out_len < sizeof resp)
391 return -ENOSPC;
392
393 if (copy_from_user(&cmd, buf, sizeof cmd))
394 return -EFAULT;
395
396 ret = ib_query_device(file->device->ib_dev, &attr);
397 if (ret)
398 return ret;
399
400 memset(&resp, 0, sizeof resp);
401
402 resp.fw_ver = attr.fw_ver;
cf311cd4 403 resp.node_guid = file->device->ib_dev->node_guid;
bc38a6ab
RD		 404 resp.sys_image_guid = attr.sys_image_guid;
405 resp.max_mr_size = attr.max_mr_size;
406 resp.page_size_cap = attr.page_size_cap;
407 resp.vendor_id = attr.vendor_id;
408 resp.vendor_part_id = attr.vendor_part_id;
409 resp.hw_ver = attr.hw_ver;
410 resp.max_qp = attr.max_qp;
411 resp.max_qp_wr = attr.max_qp_wr;
412 resp.device_cap_flags = attr.device_cap_flags;
413 resp.max_sge = attr.max_sge;
414 resp.max_sge_rd = attr.max_sge_rd;
415 resp.max_cq = attr.max_cq;
416 resp.max_cqe = attr.max_cqe;
417 resp.max_mr = attr.max_mr;
418 resp.max_pd = attr.max_pd;
419 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
420 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
421 resp.max_res_rd_atom = attr.max_res_rd_atom;
422 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
423 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
424 resp.atomic_cap = attr.atomic_cap;
425 resp.max_ee = attr.max_ee;
426 resp.max_rdd = attr.max_rdd;
427 resp.max_mw = attr.max_mw;
428 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
429 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
430 resp.max_mcast_grp = attr.max_mcast_grp;
431 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
432 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
433 resp.max_ah = attr.max_ah;
434 resp.max_fmr = attr.max_fmr;
435 resp.max_map_per_fmr = attr.max_map_per_fmr;
436 resp.max_srq = attr.max_srq;
437 resp.max_srq_wr = attr.max_srq_wr;
438 resp.max_srq_sge = attr.max_srq_sge;
439 resp.max_pkeys = attr.max_pkeys;
440 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
441 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
442
443 if (copy_to_user((void __user *) (unsigned long) cmd.response,
444 &resp, sizeof resp))
445 return -EFAULT;
446
447 return in_len;
448}
449
450ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
451 const char __user *buf,
452 int in_len, int out_len)
453{
454 struct ib_uverbs_query_port cmd;
455 struct ib_uverbs_query_port_resp resp;
456 struct ib_port_attr attr;
457 int ret;
458
459 if (out_len < sizeof resp)
460 return -ENOSPC;
461
462 if (copy_from_user(&cmd, buf, sizeof cmd))
463 return -EFAULT;
464
465 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
466 if (ret)
467 return ret;
468
469 memset(&resp, 0, sizeof resp);
470
471 resp.state = attr.state;
472 resp.max_mtu = attr.max_mtu;
473 resp.active_mtu = attr.active_mtu;
474 resp.gid_tbl_len = attr.gid_tbl_len;
475 resp.port_cap_flags = attr.port_cap_flags;
476 resp.max_msg_sz = attr.max_msg_sz;
477 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
478 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
479 resp.pkey_tbl_len = attr.pkey_tbl_len;
480 resp.lid = attr.lid;
481 resp.sm_lid = attr.sm_lid;
482 resp.lmc = attr.lmc;
483 resp.max_vl_num = attr.max_vl_num;
484 resp.sm_sl = attr.sm_sl;
485 resp.subnet_timeout = attr.subnet_timeout;
486 resp.init_type_reply = attr.init_type_reply;
487 resp.active_width = attr.active_width;
488 resp.active_speed = attr.active_speed;
489 resp.phys_state = attr.phys_state;
2420b60b
EC		 490 resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev,
491 cmd.port_num);
bc38a6ab
RD		 492
493 if (copy_to_user((void __user *) (unsigned long) cmd.response,
494 &resp, sizeof resp))
495 return -EFAULT;
496
497 return in_len;
498}
499
bc38a6ab
RD		 500ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
501 const char __user *buf,
502 int in_len, int out_len)
503{
504 struct ib_uverbs_alloc_pd cmd;
505 struct ib_uverbs_alloc_pd_resp resp;
506 struct ib_udata udata;
507 struct ib_uobject *uobj;
508 struct ib_pd *pd;
509 int ret;
510
511 if (out_len < sizeof resp)
512 return -ENOSPC;
513
514 if (copy_from_user(&cmd, buf, sizeof cmd))
515 return -EFAULT;
516
517 INIT_UDATA(&udata, buf + sizeof cmd,
518 (unsigned long) cmd.response + sizeof resp,
519 in_len - sizeof cmd, out_len - sizeof resp);
520
521 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
522 if (!uobj)
523 return -ENOMEM;
524
3bea57a5 525 init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
9ead190b 526 down_write(&uobj->mutex);
bc38a6ab
RD		 527
528 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
529 file->ucontext, &udata);
530 if (IS_ERR(pd)) {
531 ret = PTR_ERR(pd);
532 goto err;
533 }
534
535 pd->device = file->device->ib_dev;
536 pd->uobject = uobj;
537 atomic_set(&pd->usecnt, 0);
538
9ead190b
RD		 539 uobj->object = pd;
540 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
bc38a6ab 541 if (ret)
9ead190b 542 goto err_idr;
bc38a6ab
RD		 543
544 memset(&resp, 0, sizeof resp);
545 resp.pd_handle = uobj->id;
546
547 if (copy_to_user((void __user *) (unsigned long) cmd.response,
548 &resp, sizeof resp)) {
549 ret = -EFAULT;
9ead190b 550 goto err_copy;
bc38a6ab
RD		 551 }
552
95ed644f 553 mutex_lock(&file->mutex);
eb9d3cd5 554 list_add_tail(&uobj->list, &file->ucontext->pd_list);
95ed644f 555 mutex_unlock(&file->mutex);
bc38a6ab 556
9ead190b
RD		 557 uobj->live = 1;
558
559 up_write(&uobj->mutex);
bc38a6ab 560
eb9d3cd5
RD		 561 return in_len;
562
9ead190b
RD		 563err_copy:
564 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
eb9d3cd5 565
9ead190b 566err_idr:
bc38a6ab
RD		 567 ib_dealloc_pd(pd);
568
569err:
9ead190b 570 put_uobj_write(uobj);
bc38a6ab
RD		 571 return ret;
572}
573
574ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
575 const char __user *buf,
576 int in_len, int out_len)
577{
578 struct ib_uverbs_dealloc_pd cmd;
bc38a6ab 579 struct ib_uobject *uobj;
9ead190b 580 int ret;
bc38a6ab
RD		 581
582 if (copy_from_user(&cmd, buf, sizeof cmd))
583 return -EFAULT;
584
9ead190b
RD		 585 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
586 if (!uobj)
587 return -EINVAL;
bc38a6ab 588
9ead190b
RD		 589 ret = ib_dealloc_pd(uobj->object);
590 if (!ret)
591 uobj->live = 0;
bc38a6ab 592
9ead190b 593 put_uobj_write(uobj);
bc38a6ab 594
bc38a6ab 595 if (ret)
9ead190b 596 return ret;
bc38a6ab 597
9ead190b 598 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
bc38a6ab 599
95ed644f 600 mutex_lock(&file->mutex);
bc38a6ab 601 list_del(&uobj->list);
95ed644f 602 mutex_unlock(&file->mutex);
bc38a6ab 603
9ead190b 604 put_uobj(uobj);
bc38a6ab 605
9ead190b 606 return in_len;
bc38a6ab
RD		 607}
608
53d0bd1e
SH		 609struct xrcd_table_entry {
610 struct rb_node node;
611 struct ib_xrcd *xrcd;
612 struct inode *inode;
613};
614
615static int xrcd_table_insert(struct ib_uverbs_device *dev,
616 struct inode *inode,
617 struct ib_xrcd *xrcd)
618{
619 struct xrcd_table_entry *entry, *scan;
620 struct rb_node **p = &dev->xrcd_tree.rb_node;
621 struct rb_node *parent = NULL;
622
623 entry = kmalloc(sizeof *entry, GFP_KERNEL);
624 if (!entry)
625 return -ENOMEM;
626
627 entry->xrcd = xrcd;
628 entry->inode = inode;
629
630 while (*p) {
631 parent = *p;
632 scan = rb_entry(parent, struct xrcd_table_entry, node);
633
634 if (inode < scan->inode) {
635 p = &(*p)->rb_left;
636 } else if (inode > scan->inode) {
637 p = &(*p)->rb_right;
638 } else {
639 kfree(entry);
640 return -EEXIST;
641 }
642 }
643
644 rb_link_node(&entry->node, parent, p);
645 rb_insert_color(&entry->node, &dev->xrcd_tree);
646 igrab(inode);
647 return 0;
648}
649
650static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
651 struct inode *inode)
652{
653 struct xrcd_table_entry *entry;
654 struct rb_node *p = dev->xrcd_tree.rb_node;
655
656 while (p) {
657 entry = rb_entry(p, struct xrcd_table_entry, node);
658
659 if (inode < entry->inode)
660 p = p->rb_left;
661 else if (inode > entry->inode)
662 p = p->rb_right;
663 else
664 return entry;
665 }
666
667 return NULL;
668}
669
670static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
671{
672 struct xrcd_table_entry *entry;
673
674 entry = xrcd_table_search(dev, inode);
675 if (!entry)
676 return NULL;
677
678 return entry->xrcd;
679}
680
681static void xrcd_table_delete(struct ib_uverbs_device *dev,
682 struct inode *inode)
683{
684 struct xrcd_table_entry *entry;
685
686 entry = xrcd_table_search(dev, inode);
687 if (entry) {
688 iput(inode);
689 rb_erase(&entry->node, &dev->xrcd_tree);
690 kfree(entry);
691 }
692}
693
694ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
695 const char __user *buf, int in_len,
696 int out_len)
697{
698 struct ib_uverbs_open_xrcd cmd;
699 struct ib_uverbs_open_xrcd_resp resp;
700 struct ib_udata udata;
701 struct ib_uxrcd_object *obj;
702 struct ib_xrcd *xrcd = NULL;
2903ff01 703 struct fd f = {NULL, 0};
53d0bd1e 704 struct inode *inode = NULL;
2903ff01 705 int ret = 0;
53d0bd1e
SH		 706 int new_xrcd = 0;
707
708 if (out_len < sizeof resp)
709 return -ENOSPC;
710
711 if (copy_from_user(&cmd, buf, sizeof cmd))
712 return -EFAULT;
713
714 INIT_UDATA(&udata, buf + sizeof cmd,
715 (unsigned long) cmd.response + sizeof resp,
716 in_len - sizeof cmd, out_len - sizeof resp);
717
718 mutex_lock(&file->device->xrcd_tree_mutex);
719
720 if (cmd.fd != -1) {
721 /* search for file descriptor */
2903ff01
AV		 722 f = fdget(cmd.fd);
723 if (!f.file) {
53d0bd1e
SH		 724 ret = -EBADF;
725 goto err_tree_mutex_unlock;
726 }
727
496ad9aa 728 inode = file_inode(f.file);
53d0bd1e
SH		 729 xrcd = find_xrcd(file->device, inode);
730 if (!xrcd && !(cmd.oflags & O_CREAT)) {
731 /* no file descriptor. Need CREATE flag */
732 ret = -EAGAIN;
733 goto err_tree_mutex_unlock;
734 }
735
736 if (xrcd && cmd.oflags & O_EXCL) {
737 ret = -EINVAL;
738 goto err_tree_mutex_unlock;
739 }
740 }
741
742 obj = kmalloc(sizeof *obj, GFP_KERNEL);
743 if (!obj) {
744 ret = -ENOMEM;
745 goto err_tree_mutex_unlock;
746 }
747
3bea57a5 748 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
53d0bd1e
SH		 749
750 down_write(&obj->uobject.mutex);
751
752 if (!xrcd) {
753 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
754 file->ucontext, &udata);
755 if (IS_ERR(xrcd)) {
756 ret = PTR_ERR(xrcd);
757 goto err;
758 }
759
760 xrcd->inode = inode;
761 xrcd->device = file->device->ib_dev;
762 atomic_set(&xrcd->usecnt, 0);
763 mutex_init(&xrcd->tgt_qp_mutex);
764 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
765 new_xrcd = 1;
766 }
767
768 atomic_set(&obj->refcnt, 0);
769 obj->uobject.object = xrcd;
770 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
771 if (ret)
772 goto err_idr;
773
774 memset(&resp, 0, sizeof resp);
775 resp.xrcd_handle = obj->uobject.id;
776
777 if (inode) {
778 if (new_xrcd) {
779 /* create new inode/xrcd table entry */
780 ret = xrcd_table_insert(file->device, inode, xrcd);
781 if (ret)
782 goto err_insert_xrcd;
783 }
784 atomic_inc(&xrcd->usecnt);
785 }
786
787 if (copy_to_user((void __user *) (unsigned long) cmd.response,
788 &resp, sizeof resp)) {
789 ret = -EFAULT;
790 goto err_copy;
791 }
792
2903ff01
AV		 793 if (f.file)
794 fdput(f);
53d0bd1e
SH		 795
796 mutex_lock(&file->mutex);
797 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
798 mutex_unlock(&file->mutex);
799
800 obj->uobject.live = 1;
801 up_write(&obj->uobject.mutex);
802
803 mutex_unlock(&file->device->xrcd_tree_mutex);
804 return in_len;
805
806err_copy:
807 if (inode) {
808 if (new_xrcd)
809 xrcd_table_delete(file->device, inode);
810 atomic_dec(&xrcd->usecnt);
811 }
812
813err_insert_xrcd:
814 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
815
816err_idr:
817 ib_dealloc_xrcd(xrcd);
818
819err:
820 put_uobj_write(&obj->uobject);
821
822err_tree_mutex_unlock:
2903ff01
AV		 823 if (f.file)
824 fdput(f);
53d0bd1e
SH		 825
826 mutex_unlock(&file->device->xrcd_tree_mutex);
827
828 return ret;
829}
830
831ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
832 const char __user *buf, int in_len,
833 int out_len)
834{
835 struct ib_uverbs_close_xrcd cmd;
836 struct ib_uobject *uobj;
837 struct ib_xrcd *xrcd = NULL;
838 struct inode *inode = NULL;
839 struct ib_uxrcd_object *obj;
840 int live;
841 int ret = 0;
842
843 if (copy_from_user(&cmd, buf, sizeof cmd))
844 return -EFAULT;
845
846 mutex_lock(&file->device->xrcd_tree_mutex);
847 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
848 if (!uobj) {
849 ret = -EINVAL;
850 goto out;
851 }
852
853 xrcd = uobj->object;
854 inode = xrcd->inode;
855 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
856 if (atomic_read(&obj->refcnt)) {
857 put_uobj_write(uobj);
858 ret = -EBUSY;
859 goto out;
860 }
861
862 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
863 ret = ib_dealloc_xrcd(uobj->object);
864 if (!ret)
865 uobj->live = 0;
866 }
867
868 live = uobj->live;
869 if (inode && ret)
870 atomic_inc(&xrcd->usecnt);
871
872 put_uobj_write(uobj);
873
874 if (ret)
875 goto out;
876
877 if (inode && !live)
878 xrcd_table_delete(file->device, inode);
879
880 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
881 mutex_lock(&file->mutex);
882 list_del(&uobj->list);
883 mutex_unlock(&file->mutex);
884
885 put_uobj(uobj);
886 ret = in_len;
887
888out:
889 mutex_unlock(&file->device->xrcd_tree_mutex);
890 return ret;
891}
892
893void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
894 struct ib_xrcd *xrcd)
895{
896 struct inode *inode;
897
898 inode = xrcd->inode;
899 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
900 return;
901
902 ib_dealloc_xrcd(xrcd);
903
904 if (inode)
905 xrcd_table_delete(dev, inode);
906}
907
bc38a6ab
RD		 908ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
909 const char __user *buf, int in_len,
910 int out_len)
911{
912 struct ib_uverbs_reg_mr cmd;
913 struct ib_uverbs_reg_mr_resp resp;
914 struct ib_udata udata;
f7c6a7b5 915 struct ib_uobject *uobj;
bc38a6ab
RD		 916 struct ib_pd *pd;
917 struct ib_mr *mr;
918 int ret;
919
920 if (out_len < sizeof resp)
921 return -ENOSPC;
922
923 if (copy_from_user(&cmd, buf, sizeof cmd))
924 return -EFAULT;
925
926 INIT_UDATA(&udata, buf + sizeof cmd,
927 (unsigned long) cmd.response + sizeof resp,
928 in_len - sizeof cmd, out_len - sizeof resp);
929
930 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
931 return -EINVAL;
932
1c636f80
EC		 933 ret = ib_check_mr_access(cmd.access_flags);
934 if (ret)
935 return ret;
f575394f 936
f7c6a7b5
RD		 937 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
938 if (!uobj)
bc38a6ab
RD		 939 return -ENOMEM;
940
3bea57a5 941 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
f7c6a7b5 942 down_write(&uobj->mutex);
bc38a6ab 943
9ead190b 944 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
aaf1aef5
RD		 945 if (!pd) {
946 ret = -EINVAL;
f7c6a7b5 947 goto err_free;
aaf1aef5 948 }
bc38a6ab 949
f7c6a7b5
RD		 950 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
951 cmd.access_flags, &udata);
bc38a6ab
RD		 952 if (IS_ERR(mr)) {
953 ret = PTR_ERR(mr);
9ead190b 954 goto err_put;
bc38a6ab
RD		 955 }
956
957 mr->device = pd->device;
958 mr->pd = pd;
f7c6a7b5 959 mr->uobject = uobj;
bc38a6ab
RD		 960 atomic_inc(&pd->usecnt);
961 atomic_set(&mr->usecnt, 0);
962
f7c6a7b5
RD		 963 uobj->object = mr;
964 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
bc38a6ab
RD		 965 if (ret)
966 goto err_unreg;
967
9ead190b
RD		 968 memset(&resp, 0, sizeof resp);
969 resp.lkey = mr->lkey;
970 resp.rkey = mr->rkey;
f7c6a7b5 971 resp.mr_handle = uobj->id;
bc38a6ab 972
bc38a6ab
RD		 973 if (copy_to_user((void __user *) (unsigned long) cmd.response,
974 &resp, sizeof resp)) {
975 ret = -EFAULT;
9ead190b 976 goto err_copy;
bc38a6ab
RD		 977 }
978
9ead190b
RD		 979 put_pd_read(pd);
980
95ed644f 981 mutex_lock(&file->mutex);
f7c6a7b5 982 list_add_tail(&uobj->list, &file->ucontext->mr_list);
95ed644f 983 mutex_unlock(&file->mutex);
eb9d3cd5 984
f7c6a7b5 985 uobj->live = 1;
9ead190b 986
f7c6a7b5 987 up_write(&uobj->mutex);
bc38a6ab
RD		 988
989 return in_len;
990
9ead190b 991err_copy:
f7c6a7b5 992 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
bc38a6ab
RD		 993
994err_unreg:
995 ib_dereg_mr(mr);
996
9ead190b
RD		 997err_put:
998 put_pd_read(pd);
bc38a6ab 999
bc38a6ab 1000err_free:
f7c6a7b5 1001 put_uobj_write(uobj);
bc38a6ab
RD		 1002 return ret;
1003}
1004
7e6edb9b
MB		 1005ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
1006 const char __user *buf, int in_len,
1007 int out_len)
1008{
1009 struct ib_uverbs_rereg_mr cmd;
1010 struct ib_uverbs_rereg_mr_resp resp;
1011 struct ib_udata udata;
1012 struct ib_pd *pd = NULL;
1013 struct ib_mr *mr;
1014 struct ib_pd *old_pd;
1015 int ret;
1016 struct ib_uobject *uobj;
1017
1018 if (out_len < sizeof(resp))
1019 return -ENOSPC;
1020
1021 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1022 return -EFAULT;
1023
1024 INIT_UDATA(&udata, buf + sizeof(cmd),
1025 (unsigned long) cmd.response + sizeof(resp),
1026 in_len - sizeof(cmd), out_len - sizeof(resp));
1027
1028 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
1029 return -EINVAL;
1030
1031 if ((cmd.flags & IB_MR_REREG_TRANS) &&
1032 (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
1033 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
1034 return -EINVAL;
1035
1036 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle,
1037 file->ucontext);
1038
1039 if (!uobj)
1040 return -EINVAL;
1041
1042 mr = uobj->object;
1043
1044 if (cmd.flags & IB_MR_REREG_ACCESS) {
1045 ret = ib_check_mr_access(cmd.access_flags);
1046 if (ret)
1047 goto put_uobjs;
1048 }
1049
1050 if (cmd.flags & IB_MR_REREG_PD) {
1051 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1052 if (!pd) {
1053 ret = -EINVAL;
1054 goto put_uobjs;
1055 }
1056 }
1057
1058 if (atomic_read(&mr->usecnt)) {
1059 ret = -EBUSY;
1060 goto put_uobj_pd;
1061 }
1062
1063 old_pd = mr->pd;
1064 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
1065 cmd.length, cmd.hca_va,
1066 cmd.access_flags, pd, &udata);
1067 if (!ret) {
1068 if (cmd.flags & IB_MR_REREG_PD) {
1069 atomic_inc(&pd->usecnt);
1070 mr->pd = pd;
1071 atomic_dec(&old_pd->usecnt);
1072 }
1073 } else {
1074 goto put_uobj_pd;
1075 }
1076
1077 memset(&resp, 0, sizeof(resp));
1078 resp.lkey = mr->lkey;
1079 resp.rkey = mr->rkey;
1080
1081 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1082 &resp, sizeof(resp)))
1083 ret = -EFAULT;
1084 else
1085 ret = in_len;
1086
1087put_uobj_pd:
1088 if (cmd.flags & IB_MR_REREG_PD)
1089 put_pd_read(pd);
1090
1091put_uobjs:
1092
1093 put_uobj_write(mr->uobject);
1094
1095 return ret;
1096}
1097
bc38a6ab
RD		 1098ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1099 const char __user *buf, int in_len,
1100 int out_len)
1101{
1102 struct ib_uverbs_dereg_mr cmd;
1103 struct ib_mr *mr;
9ead190b 1104 struct ib_uobject *uobj;
bc38a6ab
RD		 1105 int ret = -EINVAL;
1106
1107 if (copy_from_user(&cmd, buf, sizeof cmd))
1108 return -EFAULT;
1109
9ead190b
RD		 1110 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1111 if (!uobj)
1112 return -EINVAL;
bc38a6ab 1113
f7c6a7b5 1114 mr = uobj->object;
bc38a6ab
RD		 1115
1116 ret = ib_dereg_mr(mr);
9ead190b
RD		 1117 if (!ret)
1118 uobj->live = 0;
1119
1120 put_uobj_write(uobj);
1121
bc38a6ab 1122 if (ret)
9ead190b 1123 return ret;
bc38a6ab 1124
9ead190b 1125 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
bc38a6ab 1126
95ed644f 1127 mutex_lock(&file->mutex);
9ead190b 1128 list_del(&uobj->list);
95ed644f 1129 mutex_unlock(&file->mutex);
bc38a6ab 1130
9ead190b 1131 put_uobj(uobj);
bc38a6ab 1132
9ead190b 1133 return in_len;
bc38a6ab
RD		 1134}
1135
6b52a12b
SM		 1136ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
1137 const char __user *buf, int in_len,
1138 int out_len)
1139{
1140 struct ib_uverbs_alloc_mw cmd;
1141 struct ib_uverbs_alloc_mw_resp resp;
1142 struct ib_uobject *uobj;
1143 struct ib_pd *pd;
1144 struct ib_mw *mw;
1145 int ret;
1146
1147 if (out_len < sizeof(resp))
1148 return -ENOSPC;
1149
1150 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1151 return -EFAULT;
1152
1153 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
1154 if (!uobj)
1155 return -ENOMEM;
1156
1157 init_uobj(uobj, 0, file->ucontext, &mw_lock_class);
1158 down_write(&uobj->mutex);
1159
1160 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1161 if (!pd) {
1162 ret = -EINVAL;
1163 goto err_free;
1164 }
1165
1166 mw = pd->device->alloc_mw(pd, cmd.mw_type);
1167 if (IS_ERR(mw)) {
1168 ret = PTR_ERR(mw);
1169 goto err_put;
1170 }
1171
1172 mw->device = pd->device;
1173 mw->pd = pd;
1174 mw->uobject = uobj;
1175 atomic_inc(&pd->usecnt);
1176
1177 uobj->object = mw;
1178 ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj);
1179 if (ret)
1180 goto err_unalloc;
1181
1182 memset(&resp, 0, sizeof(resp));
1183 resp.rkey = mw->rkey;
1184 resp.mw_handle = uobj->id;
1185
1186 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1187 &resp, sizeof(resp))) {
1188 ret = -EFAULT;
1189 goto err_copy;
1190 }
1191
1192 put_pd_read(pd);
1193
1194 mutex_lock(&file->mutex);
1195 list_add_tail(&uobj->list, &file->ucontext->mw_list);
1196 mutex_unlock(&file->mutex);
1197
1198 uobj->live = 1;
1199
1200 up_write(&uobj->mutex);
1201
1202 return in_len;
1203
1204err_copy:
1205 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1206
1207err_unalloc:
1208 ib_dealloc_mw(mw);
1209
1210err_put:
1211 put_pd_read(pd);
1212
1213err_free:
1214 put_uobj_write(uobj);
1215 return ret;
1216}
1217
1218ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
1219 const char __user *buf, int in_len,
1220 int out_len)
1221{
1222 struct ib_uverbs_dealloc_mw cmd;
1223 struct ib_mw *mw;
1224 struct ib_uobject *uobj;
1225 int ret = -EINVAL;
1226
1227 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1228 return -EFAULT;
1229
1230 uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext);
1231 if (!uobj)
1232 return -EINVAL;
1233
1234 mw = uobj->object;
1235
1236 ret = ib_dealloc_mw(mw);
1237 if (!ret)
1238 uobj->live = 0;
1239
1240 put_uobj_write(uobj);
1241
1242 if (ret)
1243 return ret;
1244
1245 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1246
1247 mutex_lock(&file->mutex);
1248 list_del(&uobj->list);
1249 mutex_unlock(&file->mutex);
1250
1251 put_uobj(uobj);
1252
1253 return in_len;
1254}
1255
6b73597e
RD		 1256ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1257 const char __user *buf, int in_len,
1258 int out_len)
1259{
1260 struct ib_uverbs_create_comp_channel cmd;
1261 struct ib_uverbs_create_comp_channel_resp resp;
1262 struct file *filp;
b1e4594b 1263 int ret;
6b73597e
RD		 1264
1265 if (out_len < sizeof resp)
1266 return -ENOSPC;
1267
1268 if (copy_from_user(&cmd, buf, sizeof cmd))
1269 return -EFAULT;
1270
da183c7a 1271 ret = get_unused_fd_flags(O_CLOEXEC);
b1e4594b
AV		 1272 if (ret < 0)
1273 return ret;
1274 resp.fd = ret;
1275
1276 filp = ib_uverbs_alloc_event_file(file, 0);
1277 if (IS_ERR(filp)) {
1278 put_unused_fd(resp.fd);
6b73597e 1279 return PTR_ERR(filp);
b1e4594b 1280 }
6b73597e
RD		 1281
1282 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1283 &resp, sizeof resp)) {
1284 put_unused_fd(resp.fd);
1285 fput(filp);
1286 return -EFAULT;
1287 }
1288
1289 fd_install(resp.fd, filp);
1290 return in_len;
1291}
1292
bc38a6ab
RD		 1293ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1294 const char __user *buf, int in_len,
1295 int out_len)
1296{
1297 struct ib_uverbs_create_cq cmd;
1298 struct ib_uverbs_create_cq_resp resp;
1299 struct ib_udata udata;
9ead190b 1300 struct ib_ucq_object *obj;
6b73597e 1301 struct ib_uverbs_event_file *ev_file = NULL;
bc38a6ab
RD		 1302 struct ib_cq *cq;
1303 int ret;
1304
1305 if (out_len < sizeof resp)
1306 return -ENOSPC;
1307
1308 if (copy_from_user(&cmd, buf, sizeof cmd))
1309 return -EFAULT;
1310
1311 INIT_UDATA(&udata, buf + sizeof cmd,
1312 (unsigned long) cmd.response + sizeof resp,
1313 in_len - sizeof cmd, out_len - sizeof resp);
1314
6b73597e 1315 if (cmd.comp_vector >= file->device->num_comp_vectors)
bc38a6ab
RD		 1316 return -EINVAL;
1317
9ead190b
RD		 1318 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1319 if (!obj)
bc38a6ab
RD		 1320 return -ENOMEM;
1321
3bea57a5 1322 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class);
9ead190b
RD		 1323 down_write(&obj->uobject.mutex);
1324
ac4e7b35
JM		 1325 if (cmd.comp_channel >= 0) {
1326 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
1327 if (!ev_file) {
1328 ret = -EINVAL;
1329 goto err;
1330 }
1331 }
1332
9ead190b
RD		 1333 obj->uverbs_file = file;
1334 obj->comp_events_reported = 0;
1335 obj->async_events_reported = 0;
1336 INIT_LIST_HEAD(&obj->comp_list);
1337 INIT_LIST_HEAD(&obj->async_list);
bc38a6ab
RD		 1338
1339 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
f4fd0b22 1340 cmd.comp_vector,
bc38a6ab
RD		 1341 file->ucontext, &udata);
1342 if (IS_ERR(cq)) {
1343 ret = PTR_ERR(cq);
9ead190b 1344 goto err_file;
bc38a6ab
RD		 1345 }
1346
1347 cq->device = file->device->ib_dev;
9ead190b 1348 cq->uobject = &obj->uobject;
bc38a6ab
RD		 1349 cq->comp_handler = ib_uverbs_comp_handler;
1350 cq->event_handler = ib_uverbs_cq_event_handler;
6b73597e 1351 cq->cq_context = ev_file;
bc38a6ab
RD		 1352 atomic_set(&cq->usecnt, 0);
1353
9ead190b
RD		 1354 obj->uobject.object = cq;
1355 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
bc38a6ab 1356 if (ret)
9ead190b 1357 goto err_free;
bc38a6ab
RD		 1358
1359 memset(&resp, 0, sizeof resp);
9ead190b 1360 resp.cq_handle = obj->uobject.id;
bc38a6ab
RD		 1361 resp.cqe = cq->cqe;
1362
1363 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1364 &resp, sizeof resp)) {
1365 ret = -EFAULT;
9ead190b 1366 goto err_copy;
bc38a6ab
RD		 1367 }
1368
95ed644f 1369 mutex_lock(&file->mutex);
9ead190b 1370 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
95ed644f 1371 mutex_unlock(&file->mutex);
bc38a6ab 1372
9ead190b
RD		 1373 obj->uobject.live = 1;
1374
1375 up_write(&obj->uobject.mutex);
bc38a6ab 1376
eb9d3cd5
RD		 1377 return in_len;
1378
9ead190b
RD		 1379err_copy:
1380 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
eb9d3cd5 1381
9ead190b 1382err_free:
bc38a6ab
RD		 1383 ib_destroy_cq(cq);
1384
9ead190b 1385err_file:
ac4e7b35 1386 if (ev_file)
9ead190b
RD		 1387 ib_uverbs_release_ucq(file, ev_file, obj);
1388
1389err:
1390 put_uobj_write(&obj->uobject);
bc38a6ab
RD		 1391 return ret;
1392}
1393
33b9b3ee
RD		 1394ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1395 const char __user *buf, int in_len,
1396 int out_len)
1397{
1398 struct ib_uverbs_resize_cq cmd;
1399 struct ib_uverbs_resize_cq_resp resp;
1400 struct ib_udata udata;
1401 struct ib_cq *cq;
1402 int ret = -EINVAL;
1403
1404 if (copy_from_user(&cmd, buf, sizeof cmd))
1405 return -EFAULT;
1406
1407 INIT_UDATA(&udata, buf + sizeof cmd,
1408 (unsigned long) cmd.response + sizeof resp,
1409 in_len - sizeof cmd, out_len - sizeof resp);
1410
1ccf6aa1 1411 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
9ead190b
RD		 1412 if (!cq)
1413 return -EINVAL;
33b9b3ee
RD		 1414
1415 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1416 if (ret)
1417 goto out;
1418
33b9b3ee
RD		 1419 resp.cqe = cq->cqe;
1420
1421 if (copy_to_user((void __user *) (unsigned long) cmd.response,
64f817ba 1422 &resp, sizeof resp.cqe))
33b9b3ee
RD		 1423 ret = -EFAULT;
1424
1425out:
9ead190b 1426 put_cq_read(cq);
33b9b3ee
RD		 1427
1428 return ret ? ret : in_len;
1429}
1430
7182afea
DC		 1431static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1432{
1433 struct ib_uverbs_wc tmp;
1434
1435 tmp.wr_id = wc->wr_id;
1436 tmp.status = wc->status;
1437 tmp.opcode = wc->opcode;
1438 tmp.vendor_err = wc->vendor_err;
1439 tmp.byte_len = wc->byte_len;
1440 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1441 tmp.qp_num = wc->qp->qp_num;
1442 tmp.src_qp = wc->src_qp;
1443 tmp.wc_flags = wc->wc_flags;
1444 tmp.pkey_index = wc->pkey_index;
1445 tmp.slid = wc->slid;
1446 tmp.sl = wc->sl;
1447 tmp.dlid_path_bits = wc->dlid_path_bits;
1448 tmp.port_num = wc->port_num;
1449 tmp.reserved = 0;
1450
1451 if (copy_to_user(dest, &tmp, sizeof tmp))
1452 return -EFAULT;
1453
1454 return 0;
1455}
1456
67cdb40c
RD		 1457ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1458 const char __user *buf, int in_len,
1459 int out_len)
1460{
1461 struct ib_uverbs_poll_cq cmd;
7182afea
DC		 1462 struct ib_uverbs_poll_cq_resp resp;
1463 u8 __user *header_ptr;
1464 u8 __user *data_ptr;
67cdb40c 1465 struct ib_cq *cq;
7182afea
DC		 1466 struct ib_wc wc;
1467 int ret;
67cdb40c
RD		 1468
1469 if (copy_from_user(&cmd, buf, sizeof cmd))
1470 return -EFAULT;
1471
1ccf6aa1 1472 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
7182afea
DC		 1473 if (!cq)
1474 return -EINVAL;
67cdb40c 1475
7182afea
DC		 1476 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1477 header_ptr = (void __user *)(unsigned long) cmd.response;
1478 data_ptr = header_ptr + sizeof resp;
9ead190b 1479
7182afea
DC		 1480 memset(&resp, 0, sizeof resp);
1481 while (resp.count < cmd.ne) {
1482 ret = ib_poll_cq(cq, 1, &wc);
1483 if (ret < 0)
1484 goto out_put;
1485 if (!ret)
1486 break;
1487
1488 ret = copy_wc_to_user(data_ptr, &wc);
1489 if (ret)
1490 goto out_put;
1491
1492 data_ptr += sizeof(struct ib_uverbs_wc);
1493 ++resp.count;
67cdb40c
RD		 1494 }
1495
7182afea 1496 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
67cdb40c 1497 ret = -EFAULT;
7182afea
DC		 1498 goto out_put;
1499 }
67cdb40c 1500
7182afea 1501 ret = in_len;
67cdb40c 1502
7182afea
DC		 1503out_put:
1504 put_cq_read(cq);
1505 return ret;
67cdb40c
RD		 1506}
1507
1508ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1509 const char __user *buf, int in_len,
1510 int out_len)
1511{
1512 struct ib_uverbs_req_notify_cq cmd;
1513 struct ib_cq *cq;
67cdb40c
RD		 1514
1515 if (copy_from_user(&cmd, buf, sizeof cmd))
1516 return -EFAULT;
1517
1ccf6aa1 1518 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
ab108676 1519 if (!cq)
9ead190b 1520 return -EINVAL;
67cdb40c 1521
9ead190b
RD		 1522 ib_req_notify_cq(cq, cmd.solicited_only ?
1523 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1524
ab108676 1525 put_cq_read(cq);
9ead190b
RD		 1526
1527 return in_len;
67cdb40c
RD		 1528}
1529
bc38a6ab
RD		 1530ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1531 const char __user *buf, int in_len,
1532 int out_len)
1533{
63aaf647
RD		 1534 struct ib_uverbs_destroy_cq cmd;
1535 struct ib_uverbs_destroy_cq_resp resp;
9ead190b 1536 struct ib_uobject *uobj;
63aaf647 1537 struct ib_cq *cq;
9ead190b 1538 struct ib_ucq_object *obj;
6b73597e 1539 struct ib_uverbs_event_file *ev_file;
63aaf647 1540 int ret = -EINVAL;
bc38a6ab
RD		 1541
1542 if (copy_from_user(&cmd, buf, sizeof cmd))
1543 return -EFAULT;
1544
9ead190b
RD		 1545 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1546 if (!uobj)
1547 return -EINVAL;
1548 cq = uobj->object;
1549 ev_file = cq->cq_context;
1550 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
bc38a6ab 1551
9ead190b
RD		 1552 ret = ib_destroy_cq(cq);
1553 if (!ret)
1554 uobj->live = 0;
bc38a6ab 1555
9ead190b 1556 put_uobj_write(uobj);
bc38a6ab 1557
bc38a6ab 1558 if (ret)
9ead190b 1559 return ret;
bc38a6ab 1560
9ead190b 1561 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
bc38a6ab 1562
95ed644f 1563 mutex_lock(&file->mutex);
9ead190b 1564 list_del(&uobj->list);
95ed644f 1565 mutex_unlock(&file->mutex);
bc38a6ab 1566
9ead190b 1567 ib_uverbs_release_ucq(file, ev_file, obj);
63aaf647 1568
9ead190b
RD		 1569 memset(&resp, 0, sizeof resp);
1570 resp.comp_events_reported = obj->comp_events_reported;
1571 resp.async_events_reported = obj->async_events_reported;
63aaf647 1572
9ead190b 1573 put_uobj(uobj);
bc38a6ab 1574
63aaf647
RD		 1575 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1576 &resp, sizeof resp))
9ead190b 1577 return -EFAULT;
bc38a6ab 1578
9ead190b 1579 return in_len;
bc38a6ab
RD		 1580}
1581
1582ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1583 const char __user *buf, int in_len,
1584 int out_len)
1585{
1586 struct ib_uverbs_create_qp cmd;
1587 struct ib_uverbs_create_qp_resp resp;
1588 struct ib_udata udata;
9ead190b 1589 struct ib_uqp_object *obj;
b93f3c18
SH		 1590 struct ib_device *device;
1591 struct ib_pd *pd = NULL;
1592 struct ib_xrcd *xrcd = NULL;
1593 struct ib_uobject *uninitialized_var(xrcd_uobj);
1594 struct ib_cq *scq = NULL, *rcq = NULL;
9977f4f6 1595 struct ib_srq *srq = NULL;
bc38a6ab
RD		 1596 struct ib_qp *qp;
1597 struct ib_qp_init_attr attr;
1598 int ret;
1599
1600 if (out_len < sizeof resp)
1601 return -ENOSPC;
1602
1603 if (copy_from_user(&cmd, buf, sizeof cmd))
1604 return -EFAULT;
1605
c938a616
OG		 1606 if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1607 return -EPERM;
1608
bc38a6ab
RD		 1609 INIT_UDATA(&udata, buf + sizeof cmd,
1610 (unsigned long) cmd.response + sizeof resp,
1611 in_len - sizeof cmd, out_len - sizeof resp);
1612
846be90d 1613 obj = kzalloc(sizeof *obj, GFP_KERNEL);
9ead190b 1614 if (!obj)
bc38a6ab
RD		 1615 return -ENOMEM;
1616
3bea57a5 1617 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
9ead190b 1618 down_write(&obj->uevent.uobject.mutex);
bc38a6ab 1619
b93f3c18
SH		 1620 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1621 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1622 if (!xrcd) {
1623 ret = -EINVAL;
1624 goto err_put;
1625 }
1626 device = xrcd->device;
9977f4f6 1627 } else {
b93f3c18
SH		 1628 if (cmd.qp_type == IB_QPT_XRC_INI) {
1629 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1630 } else {
1631 if (cmd.is_srq) {
1632 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1633 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1634 ret = -EINVAL;
1635 goto err_put;
1636 }
1637 }
5909ce54
RD		 1638
1639 if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1640 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1641 if (!rcq) {
1642 ret = -EINVAL;
1643 goto err_put;
1644 }
9977f4f6
SH		 1645 }
1646 }
5909ce54
RD		 1647
1648 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1649 rcq = rcq ?: scq;
1650 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1651 if (!pd || !scq) {
1652 ret = -EINVAL;
1653 goto err_put;
1654 }
1655
b93f3c18 1656 device = pd->device;
9977f4f6
SH		 1657 }
1658
bc38a6ab
RD		 1659 attr.event_handler = ib_uverbs_qp_event_handler;
1660 attr.qp_context = file;
1661 attr.send_cq = scq;
1662 attr.recv_cq = rcq;
f520ba5a 1663 attr.srq = srq;
b93f3c18 1664 attr.xrcd = xrcd;
bc38a6ab
RD		 1665 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1666 attr.qp_type = cmd.qp_type;
b846f25a 1667 attr.create_flags = 0;
bc38a6ab
RD		 1668
1669 attr.cap.max_send_wr = cmd.max_send_wr;
1670 attr.cap.max_recv_wr = cmd.max_recv_wr;
1671 attr.cap.max_send_sge = cmd.max_send_sge;
1672 attr.cap.max_recv_sge = cmd.max_recv_sge;
1673 attr.cap.max_inline_data = cmd.max_inline_data;
1674
9ead190b
RD		 1675 obj->uevent.events_reported = 0;
1676 INIT_LIST_HEAD(&obj->uevent.event_list);
1677 INIT_LIST_HEAD(&obj->mcast_list);
bc38a6ab 1678
b93f3c18
SH		 1679 if (cmd.qp_type == IB_QPT_XRC_TGT)
1680 qp = ib_create_qp(pd, &attr);
1681 else
1682 qp = device->create_qp(pd, &attr, &udata);
1683
bc38a6ab
RD		 1684 if (IS_ERR(qp)) {
1685 ret = PTR_ERR(qp);
9ead190b 1686 goto err_put;
bc38a6ab
RD		 1687 }
1688
b93f3c18 1689 if (cmd.qp_type != IB_QPT_XRC_TGT) {
0e0ec7e0 1690 qp->real_qp = qp;
b93f3c18
SH		 1691 qp->device = device;
1692 qp->pd = pd;
1693 qp->send_cq = attr.send_cq;
1694 qp->recv_cq = attr.recv_cq;
1695 qp->srq = attr.srq;
1696 qp->event_handler = attr.event_handler;
1697 qp->qp_context = attr.qp_context;
1698 qp->qp_type = attr.qp_type;
e47e321a 1699 atomic_set(&qp->usecnt, 0);
b93f3c18
SH		 1700 atomic_inc(&pd->usecnt);
1701 atomic_inc(&attr.send_cq->usecnt);
1702 if (attr.recv_cq)
1703 atomic_inc(&attr.recv_cq->usecnt);
1704 if (attr.srq)
1705 atomic_inc(&attr.srq->usecnt);
1706 }
1707 qp->uobject = &obj->uevent.uobject;
bc38a6ab 1708
9ead190b
RD		 1709 obj->uevent.uobject.object = qp;
1710 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
bc38a6ab
RD		 1711 if (ret)
1712 goto err_destroy;
1713
9ead190b
RD		 1714 memset(&resp, 0, sizeof resp);
1715 resp.qpn = qp->qp_num;
1716 resp.qp_handle = obj->uevent.uobject.id;
77369ed3
JM		 1717 resp.max_recv_sge = attr.cap.max_recv_sge;
1718 resp.max_send_sge = attr.cap.max_send_sge;
1719 resp.max_recv_wr = attr.cap.max_recv_wr;
1720 resp.max_send_wr = attr.cap.max_send_wr;
1721 resp.max_inline_data = attr.cap.max_inline_data;
bc38a6ab 1722
bc38a6ab
RD		 1723 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1724 &resp, sizeof resp)) {
1725 ret = -EFAULT;
9ead190b 1726 goto err_copy;
bc38a6ab
RD		 1727 }
1728
846be90d
YH		 1729 if (xrcd) {
1730 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1731 uobject);
1732 atomic_inc(&obj->uxrcd->refcnt);
b93f3c18 1733 put_xrcd_read(xrcd_uobj);
846be90d
YH		 1734 }
1735
b93f3c18
SH		 1736 if (pd)
1737 put_pd_read(pd);
1738 if (scq)
1739 put_cq_read(scq);
9977f4f6 1740 if (rcq && rcq != scq)
43db2bc0 1741 put_cq_read(rcq);
9ead190b
RD		 1742 if (srq)
1743 put_srq_read(srq);
1744
95ed644f 1745 mutex_lock(&file->mutex);
9ead190b 1746 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
95ed644f 1747 mutex_unlock(&file->mutex);
eb9d3cd5 1748
9ead190b
RD		 1749 obj->uevent.uobject.live = 1;
1750
1751 up_write(&obj->uevent.uobject.mutex);
bc38a6ab
RD		 1752
1753 return in_len;
1754
9ead190b
RD		 1755err_copy:
1756 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
bc38a6ab
RD		 1757
1758err_destroy:
1759 ib_destroy_qp(qp);
1760
9ead190b 1761err_put:
b93f3c18
SH		 1762 if (xrcd)
1763 put_xrcd_read(xrcd_uobj);
9ead190b
RD		 1764 if (pd)
1765 put_pd_read(pd);
1766 if (scq)
1767 put_cq_read(scq);
43db2bc0 1768 if (rcq && rcq != scq)
9ead190b
RD		 1769 put_cq_read(rcq);
1770 if (srq)
1771 put_srq_read(srq);
1772
1773 put_uobj_write(&obj->uevent.uobject);
bc38a6ab
RD		 1774 return ret;
1775}
1776
42849b26
SH		 1777ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1778 const char __user *buf, int in_len, int out_len)
1779{
1780 struct ib_uverbs_open_qp cmd;
1781 struct ib_uverbs_create_qp_resp resp;
1782 struct ib_udata udata;
1783 struct ib_uqp_object *obj;
1784 struct ib_xrcd *xrcd;
1785 struct ib_uobject *uninitialized_var(xrcd_uobj);
1786 struct ib_qp *qp;
1787 struct ib_qp_open_attr attr;
1788 int ret;
1789
1790 if (out_len < sizeof resp)
1791 return -ENOSPC;
1792
1793 if (copy_from_user(&cmd, buf, sizeof cmd))
1794 return -EFAULT;
1795
1796 INIT_UDATA(&udata, buf + sizeof cmd,
1797 (unsigned long) cmd.response + sizeof resp,
1798 in_len - sizeof cmd, out_len - sizeof resp);
1799
1800 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1801 if (!obj)
1802 return -ENOMEM;
1803
3bea57a5 1804 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
42849b26
SH		 1805 down_write(&obj->uevent.uobject.mutex);
1806
1807 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1808 if (!xrcd) {
1809 ret = -EINVAL;
1810 goto err_put;
1811 }
1812
1813 attr.event_handler = ib_uverbs_qp_event_handler;
1814 attr.qp_context = file;
1815 attr.qp_num = cmd.qpn;
1816 attr.qp_type = cmd.qp_type;
1817
1818 obj->uevent.events_reported = 0;
1819 INIT_LIST_HEAD(&obj->uevent.event_list);
1820 INIT_LIST_HEAD(&obj->mcast_list);
1821
1822 qp = ib_open_qp(xrcd, &attr);
1823 if (IS_ERR(qp)) {
1824 ret = PTR_ERR(qp);
1825 goto err_put;
1826 }
1827
1828 qp->uobject = &obj->uevent.uobject;
1829
1830 obj->uevent.uobject.object = qp;
1831 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1832 if (ret)
1833 goto err_destroy;
1834
1835 memset(&resp, 0, sizeof resp);
1836 resp.qpn = qp->qp_num;
1837 resp.qp_handle = obj->uevent.uobject.id;
1838
1839 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1840 &resp, sizeof resp)) {
1841 ret = -EFAULT;
1842 goto err_remove;
1843 }
1844
846be90d
YH		 1845 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1846 atomic_inc(&obj->uxrcd->refcnt);
42849b26
SH		 1847 put_xrcd_read(xrcd_uobj);
1848
1849 mutex_lock(&file->mutex);
1850 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1851 mutex_unlock(&file->mutex);
1852
1853 obj->uevent.uobject.live = 1;
1854
1855 up_write(&obj->uevent.uobject.mutex);
1856
1857 return in_len;
1858
1859err_remove:
1860 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1861
1862err_destroy:
1863 ib_destroy_qp(qp);
1864
1865err_put:
1866 put_xrcd_read(xrcd_uobj);
1867 put_uobj_write(&obj->uevent.uobject);
1868 return ret;
1869}
1870
7ccc9a24
DB		 1871ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1872 const char __user *buf, int in_len,
1873 int out_len)
1874{
1875 struct ib_uverbs_query_qp cmd;
1876 struct ib_uverbs_query_qp_resp resp;
1877 struct ib_qp *qp;
1878 struct ib_qp_attr *attr;
1879 struct ib_qp_init_attr *init_attr;
1880 int ret;
1881
1882 if (copy_from_user(&cmd, buf, sizeof cmd))
1883 return -EFAULT;
1884
1885 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1886 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1887 if (!attr || !init_attr) {
1888 ret = -ENOMEM;
1889 goto out;
1890 }
1891
9ead190b
RD		 1892 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1893 if (!qp) {
7ccc9a24 1894 ret = -EINVAL;
9ead190b
RD		 1895 goto out;
1896 }
1897
1898 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
7ccc9a24 1899
9ead190b 1900 put_qp_read(qp);
7ccc9a24
DB		 1901
1902 if (ret)
1903 goto out;
1904
1905 memset(&resp, 0, sizeof resp);
1906
1907 resp.qp_state = attr->qp_state;
1908 resp.cur_qp_state = attr->cur_qp_state;
1909 resp.path_mtu = attr->path_mtu;
1910 resp.path_mig_state = attr->path_mig_state;
1911 resp.qkey = attr->qkey;
1912 resp.rq_psn = attr->rq_psn;
1913 resp.sq_psn = attr->sq_psn;
1914 resp.dest_qp_num = attr->dest_qp_num;
1915 resp.qp_access_flags = attr->qp_access_flags;
1916 resp.pkey_index = attr->pkey_index;
1917 resp.alt_pkey_index = attr->alt_pkey_index;
0b26c88f 1918 resp.sq_draining = attr->sq_draining;
7ccc9a24
DB		 1919 resp.max_rd_atomic = attr->max_rd_atomic;
1920 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1921 resp.min_rnr_timer = attr->min_rnr_timer;
1922 resp.port_num = attr->port_num;
1923 resp.timeout = attr->timeout;
1924 resp.retry_cnt = attr->retry_cnt;
1925 resp.rnr_retry = attr->rnr_retry;
1926 resp.alt_port_num = attr->alt_port_num;
1927 resp.alt_timeout = attr->alt_timeout;
1928
1929 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1930 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1931 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1932 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1933 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1934 resp.dest.dlid = attr->ah_attr.dlid;
1935 resp.dest.sl = attr->ah_attr.sl;
1936 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1937 resp.dest.static_rate = attr->ah_attr.static_rate;
1938 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1939 resp.dest.port_num = attr->ah_attr.port_num;
1940
1941 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1942 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1943 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1944 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1945 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1946 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1947 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1948 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1949 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1950 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1951 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1952
1953 resp.max_send_wr = init_attr->cap.max_send_wr;
1954 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1955 resp.max_send_sge = init_attr->cap.max_send_sge;
1956 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1957 resp.max_inline_data = init_attr->cap.max_inline_data;
27d56300 1958 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
7ccc9a24
DB		 1959
1960 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1961 &resp, sizeof resp))
1962 ret = -EFAULT;
1963
1964out:
1965 kfree(attr);
1966 kfree(init_attr);
1967
1968 return ret ? ret : in_len;
1969}
1970
9977f4f6
SH		 1971/* Remove ignored fields set in the attribute mask */
1972static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1973{
1974 switch (qp_type) {
1975 case IB_QPT_XRC_INI:
1976 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
b93f3c18
SH		 1977 case IB_QPT_XRC_TGT:
1978 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1979 IB_QP_RNR_RETRY);
9977f4f6
SH		 1980 default:
1981 return mask;
1982 }
1983}
1984
bc38a6ab
RD		 1985ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1986 const char __user *buf, int in_len,
1987 int out_len)
1988{
1989 struct ib_uverbs_modify_qp cmd;
9bc57e2d 1990 struct ib_udata udata;
bc38a6ab
RD		 1991 struct ib_qp *qp;
1992 struct ib_qp_attr *attr;
1993 int ret;
1994
1995 if (copy_from_user(&cmd, buf, sizeof cmd))
1996 return -EFAULT;
1997
9bc57e2d
RC		 1998 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1999 out_len);
2000
bc38a6ab
RD		 2001 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2002 if (!attr)
2003 return -ENOMEM;
2004
9ead190b
RD		 2005 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2006 if (!qp) {
bc38a6ab
RD		 2007 ret = -EINVAL;
2008 goto out;
2009 }
2010
2011 attr->qp_state = cmd.qp_state;
2012 attr->cur_qp_state = cmd.cur_qp_state;
2013 attr->path_mtu = cmd.path_mtu;
2014 attr->path_mig_state = cmd.path_mig_state;
2015 attr->qkey = cmd.qkey;
2016 attr->rq_psn = cmd.rq_psn;
2017 attr->sq_psn = cmd.sq_psn;
2018 attr->dest_qp_num = cmd.dest_qp_num;
2019 attr->qp_access_flags = cmd.qp_access_flags;
2020 attr->pkey_index = cmd.pkey_index;
702b2aac 2021 attr->alt_pkey_index = cmd.alt_pkey_index;
bc38a6ab
RD		 2022 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
2023 attr->max_rd_atomic = cmd.max_rd_atomic;
2024 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
2025 attr->min_rnr_timer = cmd.min_rnr_timer;
2026 attr->port_num = cmd.port_num;
2027 attr->timeout = cmd.timeout;
2028 attr->retry_cnt = cmd.retry_cnt;
2029 attr->rnr_retry = cmd.rnr_retry;
2030 attr->alt_port_num = cmd.alt_port_num;
2031 attr->alt_timeout = cmd.alt_timeout;
2032
2033 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
2034 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
2035 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
2036 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
2037 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
2038 attr->ah_attr.dlid = cmd.dest.dlid;
2039 attr->ah_attr.sl = cmd.dest.sl;
2040 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
2041 attr->ah_attr.static_rate = cmd.dest.static_rate;
2042 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
2043 attr->ah_attr.port_num = cmd.dest.port_num;
2044
2045 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
2046 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
2047 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
2048 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
2049 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
2050 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
2051 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
2052 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
2053 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
2054 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
2055 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
2056
0e0ec7e0 2057 if (qp->real_qp == qp) {
ed4c54e5
OG		 2058 ret = ib_resolve_eth_l2_attrs(qp, attr, &cmd.attr_mask);
2059 if (ret)
2060 goto out;
0e0ec7e0
SH		 2061 ret = qp->device->modify_qp(qp, attr,
2062 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
2063 } else {
2064 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
2065 }
9ead190b
RD		 2066
2067 put_qp_read(qp);
2068
bc38a6ab
RD		 2069 if (ret)
2070 goto out;
2071
2072 ret = in_len;
2073
2074out:
bc38a6ab
RD		 2075 kfree(attr);
2076
2077 return ret;
2078}
2079
2080ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2081 const char __user *buf, int in_len,
2082 int out_len)
2083{
63aaf647
RD		 2084 struct ib_uverbs_destroy_qp cmd;
2085 struct ib_uverbs_destroy_qp_resp resp;
9ead190b 2086 struct ib_uobject *uobj;
63aaf647 2087 struct ib_qp *qp;
9ead190b 2088 struct ib_uqp_object *obj;
63aaf647 2089 int ret = -EINVAL;
bc38a6ab
RD		 2090
2091 if (copy_from_user(&cmd, buf, sizeof cmd))
2092 return -EFAULT;
2093
63aaf647
RD		 2094 memset(&resp, 0, sizeof resp);
2095
9ead190b
RD		 2096 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2097 if (!uobj)
2098 return -EINVAL;
2099 qp = uobj->object;
2100 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
f4e40156 2101
9ead190b
RD		 2102 if (!list_empty(&obj->mcast_list)) {
2103 put_uobj_write(uobj);
2104 return -EBUSY;
f4e40156 2105 }
bc38a6ab
RD		 2106
2107 ret = ib_destroy_qp(qp);
9ead190b
RD		 2108 if (!ret)
2109 uobj->live = 0;
2110
2111 put_uobj_write(uobj);
2112
bc38a6ab 2113 if (ret)
9ead190b 2114 return ret;
bc38a6ab 2115
846be90d
YH		 2116 if (obj->uxrcd)
2117 atomic_dec(&obj->uxrcd->refcnt);
2118
9ead190b 2119 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
bc38a6ab 2120
95ed644f 2121 mutex_lock(&file->mutex);
9ead190b 2122 list_del(&uobj->list);
95ed644f 2123 mutex_unlock(&file->mutex);
bc38a6ab 2124
9ead190b 2125 ib_uverbs_release_uevent(file, &obj->uevent);
63aaf647 2126
9ead190b 2127 resp.events_reported = obj->uevent.events_reported;
63aaf647 2128
9ead190b 2129 put_uobj(uobj);
bc38a6ab 2130
63aaf647
RD		 2131 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2132 &resp, sizeof resp))
9ead190b 2133 return -EFAULT;
bc38a6ab 2134
9ead190b 2135 return in_len;
bc38a6ab
RD		 2136}
2137
67cdb40c 2138ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
a74cd4af
RD		 2139 const char __user *buf, int in_len,
2140 int out_len)
67cdb40c
RD		 2141{
2142 struct ib_uverbs_post_send cmd;
2143 struct ib_uverbs_post_send_resp resp;
2144 struct ib_uverbs_send_wr *user_wr;
2145 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
2146 struct ib_qp *qp;
2147 int i, sg_ind;
9ead190b 2148 int is_ud;
67cdb40c
RD		 2149 ssize_t ret = -EINVAL;
2150
2151 if (copy_from_user(&cmd, buf, sizeof cmd))
2152 return -EFAULT;
2153
2154 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2155 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2156 return -EINVAL;
2157
2158 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2159 return -EINVAL;
2160
2161 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2162 if (!user_wr)
2163 return -ENOMEM;
2164
9ead190b
RD		 2165 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2166 if (!qp)
67cdb40c
RD		 2167 goto out;
2168
9ead190b 2169 is_ud = qp->qp_type == IB_QPT_UD;
67cdb40c
RD		 2170 sg_ind = 0;
2171 last = NULL;
2172 for (i = 0; i < cmd.wr_count; ++i) {
2173 if (copy_from_user(user_wr,
2174 buf + sizeof cmd + i * cmd.wqe_size,
2175 cmd.wqe_size)) {
2176 ret = -EFAULT;
9ead190b 2177 goto out_put;
67cdb40c
RD		 2178 }
2179
2180 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2181 ret = -EINVAL;
9ead190b 2182 goto out_put;
67cdb40c
RD		 2183 }
2184
2185 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2186 user_wr->num_sge * sizeof (struct ib_sge),
2187 GFP_KERNEL);
2188 if (!next) {
2189 ret = -ENOMEM;
9ead190b 2190 goto out_put;
67cdb40c
RD		 2191 }
2192
2193 if (!last)
2194 wr = next;
2195 else
2196 last->next = next;
2197 last = next;
2198
2199 next->next = NULL;
2200 next->wr_id = user_wr->wr_id;
2201 next->num_sge = user_wr->num_sge;
2202 next->opcode = user_wr->opcode;
2203 next->send_flags = user_wr->send_flags;
67cdb40c 2204
9ead190b
RD		 2205 if (is_ud) {
2206 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
2207 file->ucontext);
67cdb40c
RD		 2208 if (!next->wr.ud.ah) {
2209 ret = -EINVAL;
9ead190b 2210 goto out_put;
67cdb40c
RD		 2211 }
2212 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
2213 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
6b7d103c
LI		 2214 if (next->opcode == IB_WR_SEND_WITH_IMM)
2215 next->ex.imm_data =
2216 (__be32 __force) user_wr->ex.imm_data;
67cdb40c
RD		 2217 } else {
2218 switch (next->opcode) {
67cdb40c 2219 case IB_WR_RDMA_WRITE_WITH_IMM:
0f39cf3d
RD		 2220 next->ex.imm_data =
2221 (__be32 __force) user_wr->ex.imm_data;
2222 case IB_WR_RDMA_WRITE:
67cdb40c
RD		 2223 case IB_WR_RDMA_READ:
2224 next->wr.rdma.remote_addr =
2225 user_wr->wr.rdma.remote_addr;
2226 next->wr.rdma.rkey =
2227 user_wr->wr.rdma.rkey;
2228 break;
0f39cf3d
RD		 2229 case IB_WR_SEND_WITH_IMM:
2230 next->ex.imm_data =
2231 (__be32 __force) user_wr->ex.imm_data;
2232 break;
2233 case IB_WR_SEND_WITH_INV:
2234 next->ex.invalidate_rkey =
2235 user_wr->ex.invalidate_rkey;
2236 break;
67cdb40c
RD		 2237 case IB_WR_ATOMIC_CMP_AND_SWP:
2238 case IB_WR_ATOMIC_FETCH_AND_ADD:
2239 next->wr.atomic.remote_addr =
2240 user_wr->wr.atomic.remote_addr;
2241 next->wr.atomic.compare_add =
2242 user_wr->wr.atomic.compare_add;
2243 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2244 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2245 break;
2246 default:
2247 break;
2248 }
2249 }
2250
2251 if (next->num_sge) {
2252 next->sg_list = (void *) next +
2253 ALIGN(sizeof *next, sizeof (struct ib_sge));
2254 if (copy_from_user(next->sg_list,
2255 buf + sizeof cmd +
2256 cmd.wr_count * cmd.wqe_size +
2257 sg_ind * sizeof (struct ib_sge),
2258 next->num_sge * sizeof (struct ib_sge))) {
2259 ret = -EFAULT;
9ead190b 2260 goto out_put;
67cdb40c
RD		 2261 }
2262 sg_ind += next->num_sge;
2263 } else
2264 next->sg_list = NULL;
2265 }
2266
2267 resp.bad_wr = 0;
0e0ec7e0 2268 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
67cdb40c
RD		 2269 if (ret)
2270 for (next = wr; next; next = next->next) {
2271 ++resp.bad_wr;
2272 if (next == bad_wr)
2273 break;
2274 }
2275
2276 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2277 &resp, sizeof resp))
2278 ret = -EFAULT;
2279
9ead190b
RD		 2280out_put:
2281 put_qp_read(qp);
67cdb40c
RD		 2282
2283 while (wr) {
9ead190b
RD		 2284 if (is_ud && wr->wr.ud.ah)
2285 put_ah_read(wr->wr.ud.ah);
67cdb40c
RD		 2286 next = wr->next;
2287 kfree(wr);
2288 wr = next;
2289 }
2290
18320828 2291out:
67cdb40c
RD		 2292 kfree(user_wr);
2293
2294 return ret ? ret : in_len;
2295}
2296
2297static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2298 int in_len,
2299 u32 wr_count,
2300 u32 sge_count,
2301 u32 wqe_size)
2302{
2303 struct ib_uverbs_recv_wr *user_wr;
2304 struct ib_recv_wr *wr = NULL, *last, *next;
2305 int sg_ind;
2306 int i;
2307 int ret;
2308
2309 if (in_len < wqe_size * wr_count +
2310 sge_count * sizeof (struct ib_uverbs_sge))
2311 return ERR_PTR(-EINVAL);
2312
2313 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2314 return ERR_PTR(-EINVAL);
2315
2316 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2317 if (!user_wr)
2318 return ERR_PTR(-ENOMEM);
2319
2320 sg_ind = 0;
2321 last = NULL;
2322 for (i = 0; i < wr_count; ++i) {
2323 if (copy_from_user(user_wr, buf + i * wqe_size,
2324 wqe_size)) {
2325 ret = -EFAULT;
2326 goto err;
2327 }
2328
2329 if (user_wr->num_sge + sg_ind > sge_count) {
2330 ret = -EINVAL;
2331 goto err;
2332 }
2333
2334 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2335 user_wr->num_sge * sizeof (struct ib_sge),
2336 GFP_KERNEL);
2337 if (!next) {
2338 ret = -ENOMEM;
2339 goto err;
2340 }
2341
2342 if (!last)
2343 wr = next;
2344 else
2345 last->next = next;
2346 last = next;
2347
2348 next->next = NULL;
2349 next->wr_id = user_wr->wr_id;
2350 next->num_sge = user_wr->num_sge;
2351
2352 if (next->num_sge) {
2353 next->sg_list = (void *) next +
2354 ALIGN(sizeof *next, sizeof (struct ib_sge));
2355 if (copy_from_user(next->sg_list,
2356 buf + wr_count * wqe_size +
2357 sg_ind * sizeof (struct ib_sge),
2358 next->num_sge * sizeof (struct ib_sge))) {
2359 ret = -EFAULT;
2360 goto err;
2361 }
2362 sg_ind += next->num_sge;
2363 } else
2364 next->sg_list = NULL;
2365 }
2366
2367 kfree(user_wr);
2368 return wr;
2369
2370err:
2371 kfree(user_wr);
2372
2373 while (wr) {
2374 next = wr->next;
2375 kfree(wr);
2376 wr = next;
2377 }
2378
2379 return ERR_PTR(ret);
2380}
2381
2382ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
a74cd4af
RD		 2383 const char __user *buf, int in_len,
2384 int out_len)
67cdb40c
RD		 2385{
2386 struct ib_uverbs_post_recv cmd;
2387 struct ib_uverbs_post_recv_resp resp;
2388 struct ib_recv_wr *wr, *next, *bad_wr;
2389 struct ib_qp *qp;
2390 ssize_t ret = -EINVAL;
2391
2392 if (copy_from_user(&cmd, buf, sizeof cmd))
2393 return -EFAULT;
2394
2395 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2396 in_len - sizeof cmd, cmd.wr_count,
2397 cmd.sge_count, cmd.wqe_size);
2398 if (IS_ERR(wr))
2399 return PTR_ERR(wr);
2400
9ead190b
RD		 2401 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2402 if (!qp)
67cdb40c
RD		 2403 goto out;
2404
2405 resp.bad_wr = 0;
0e0ec7e0 2406 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
9ead190b
RD		 2407
2408 put_qp_read(qp);
2409
67cdb40c
RD		 2410 if (ret)
2411 for (next = wr; next; next = next->next) {
2412 ++resp.bad_wr;
2413 if (next == bad_wr)
2414 break;
2415 }
2416
67cdb40c
RD		 2417 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2418 &resp, sizeof resp))
2419 ret = -EFAULT;
2420
2421out:
67cdb40c
RD		 2422 while (wr) {
2423 next = wr->next;
2424 kfree(wr);
2425 wr = next;
2426 }
2427
2428 return ret ? ret : in_len;
2429}
2430
2431ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
a74cd4af
RD		 2432 const char __user *buf, int in_len,
2433 int out_len)
67cdb40c
RD		 2434{
2435 struct ib_uverbs_post_srq_recv cmd;
2436 struct ib_uverbs_post_srq_recv_resp resp;
2437 struct ib_recv_wr *wr, *next, *bad_wr;
2438 struct ib_srq *srq;
2439 ssize_t ret = -EINVAL;
2440
2441 if (copy_from_user(&cmd, buf, sizeof cmd))
2442 return -EFAULT;
2443
2444 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2445 in_len - sizeof cmd, cmd.wr_count,
2446 cmd.sge_count, cmd.wqe_size);
2447 if (IS_ERR(wr))
2448 return PTR_ERR(wr);
2449
9ead190b
RD		 2450 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2451 if (!srq)
67cdb40c
RD		 2452 goto out;
2453
2454 resp.bad_wr = 0;
2455 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
9ead190b
RD		 2456
2457 put_srq_read(srq);
2458
67cdb40c
RD		 2459 if (ret)
2460 for (next = wr; next; next = next->next) {
2461 ++resp.bad_wr;
2462 if (next == bad_wr)
2463 break;
2464 }
2465
67cdb40c
RD		 2466 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2467 &resp, sizeof resp))
2468 ret = -EFAULT;
2469
2470out:
67cdb40c
RD		 2471 while (wr) {
2472 next = wr->next;
2473 kfree(wr);
2474 wr = next;
2475 }
2476
2477 return ret ? ret : in_len;
2478}
2479
2480ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2481 const char __user *buf, int in_len,
2482 int out_len)
2483{
2484 struct ib_uverbs_create_ah cmd;
2485 struct ib_uverbs_create_ah_resp resp;
2486 struct ib_uobject *uobj;
2487 struct ib_pd *pd;
2488 struct ib_ah *ah;
2489 struct ib_ah_attr attr;
2490 int ret;
2491
2492 if (out_len < sizeof resp)
2493 return -ENOSPC;
2494
2495 if (copy_from_user(&cmd, buf, sizeof cmd))
2496 return -EFAULT;
2497
2498 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2499 if (!uobj)
2500 return -ENOMEM;
2501
3bea57a5 2502 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
9ead190b 2503 down_write(&uobj->mutex);
67cdb40c 2504
9ead190b
RD		 2505 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2506 if (!pd) {
67cdb40c 2507 ret = -EINVAL;
9ead190b 2508 goto err;
67cdb40c
RD		 2509 }
2510
67cdb40c
RD		 2511 attr.dlid = cmd.attr.dlid;
2512 attr.sl = cmd.attr.sl;
2513 attr.src_path_bits = cmd.attr.src_path_bits;
2514 attr.static_rate = cmd.attr.static_rate;
ea5d4a6a 2515 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
67cdb40c
RD		 2516 attr.port_num = cmd.attr.port_num;
2517 attr.grh.flow_label = cmd.attr.grh.flow_label;
2518 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2519 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2520 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2521 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2522
2523 ah = ib_create_ah(pd, &attr);
2524 if (IS_ERR(ah)) {
2525 ret = PTR_ERR(ah);
ec924b47 2526 goto err_put;
67cdb40c
RD		 2527 }
2528
9ead190b
RD		 2529 ah->uobject = uobj;
2530 uobj->object = ah;
67cdb40c 2531
9ead190b 2532 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
67cdb40c
RD		 2533 if (ret)
2534 goto err_destroy;
2535
2536 resp.ah_handle = uobj->id;
2537
2538 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2539 &resp, sizeof resp)) {
2540 ret = -EFAULT;
9ead190b 2541 goto err_copy;
67cdb40c
RD		 2542 }
2543
9ead190b
RD		 2544 put_pd_read(pd);
2545
95ed644f 2546 mutex_lock(&file->mutex);
67cdb40c 2547 list_add_tail(&uobj->list, &file->ucontext->ah_list);
95ed644f 2548 mutex_unlock(&file->mutex);
67cdb40c 2549
9ead190b
RD		 2550 uobj->live = 1;
2551
2552 up_write(&uobj->mutex);
67cdb40c
RD		 2553
2554 return in_len;
2555
9ead190b
RD		 2556err_copy:
2557 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
67cdb40c
RD		 2558
2559err_destroy:
2560 ib_destroy_ah(ah);
2561
ec924b47
MT		 2562err_put:
2563 put_pd_read(pd);
2564
9ead190b
RD		 2565err:
2566 put_uobj_write(uobj);
67cdb40c
RD		 2567 return ret;
2568}
2569
2570ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2571 const char __user *buf, int in_len, int out_len)
2572{
2573 struct ib_uverbs_destroy_ah cmd;
2574 struct ib_ah *ah;
2575 struct ib_uobject *uobj;
9ead190b 2576 int ret;
67cdb40c
RD		 2577
2578 if (copy_from_user(&cmd, buf, sizeof cmd))
2579 return -EFAULT;
2580
9ead190b
RD		 2581 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2582 if (!uobj)
2583 return -EINVAL;
2584 ah = uobj->object;
67cdb40c 2585
9ead190b
RD		 2586 ret = ib_destroy_ah(ah);
2587 if (!ret)
2588 uobj->live = 0;
67cdb40c 2589
9ead190b 2590 put_uobj_write(uobj);
67cdb40c 2591
67cdb40c 2592 if (ret)
9ead190b 2593 return ret;
67cdb40c 2594
9ead190b 2595 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
67cdb40c 2596
95ed644f 2597 mutex_lock(&file->mutex);
67cdb40c 2598 list_del(&uobj->list);
95ed644f 2599 mutex_unlock(&file->mutex);
67cdb40c 2600
9ead190b 2601 put_uobj(uobj);
67cdb40c 2602
9ead190b 2603 return in_len;
67cdb40c
RD		 2604}
2605
bc38a6ab
RD		 2606ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2607 const char __user *buf, int in_len,
2608 int out_len)
2609{
2610 struct ib_uverbs_attach_mcast cmd;
2611 struct ib_qp *qp;
9ead190b 2612 struct ib_uqp_object *obj;
f4e40156 2613 struct ib_uverbs_mcast_entry *mcast;
9ead190b 2614 int ret;
bc38a6ab
RD		 2615
2616 if (copy_from_user(&cmd, buf, sizeof cmd))
2617 return -EFAULT;
2618
e214a0fe 2619 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
9ead190b
RD		 2620 if (!qp)
2621 return -EINVAL;
f4e40156 2622
9ead190b 2623 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
f4e40156 2624
9ead190b 2625 list_for_each_entry(mcast, &obj->mcast_list, list)
f4e40156
JM		 2626 if (cmd.mlid == mcast->lid &&
2627 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2628 ret = 0;
9ead190b 2629 goto out_put;
f4e40156
JM		 2630 }
2631
2632 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2633 if (!mcast) {
2634 ret = -ENOMEM;
9ead190b 2635 goto out_put;
f4e40156
JM		 2636 }
2637
2638 mcast->lid = cmd.mlid;
2639 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
bc38a6ab 2640
f4e40156 2641 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
9ead190b
RD		 2642 if (!ret)
2643 list_add_tail(&mcast->list, &obj->mcast_list);
2644 else
f4e40156
JM		 2645 kfree(mcast);
2646
9ead190b 2647out_put:
e214a0fe 2648 put_qp_write(qp);
bc38a6ab
RD		 2649
2650 return ret ? ret : in_len;
2651}
2652
2653ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2654 const char __user *buf, int in_len,
2655 int out_len)
2656{
2657 struct ib_uverbs_detach_mcast cmd;
9ead190b 2658 struct ib_uqp_object *obj;
bc38a6ab 2659 struct ib_qp *qp;
f4e40156 2660 struct ib_uverbs_mcast_entry *mcast;
bc38a6ab
RD		 2661 int ret = -EINVAL;
2662
2663 if (copy_from_user(&cmd, buf, sizeof cmd))
2664 return -EFAULT;
2665
e214a0fe 2666 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
9ead190b
RD		 2667 if (!qp)
2668 return -EINVAL;
bc38a6ab 2669
f4e40156
JM		 2670 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2671 if (ret)
9ead190b 2672 goto out_put;
f4e40156 2673
9ead190b 2674 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
f4e40156 2675
9ead190b 2676 list_for_each_entry(mcast, &obj->mcast_list, list)
f4e40156
JM		 2677 if (cmd.mlid == mcast->lid &&
2678 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2679 list_del(&mcast->list);
2680 kfree(mcast);
2681 break;
2682 }
2683
9ead190b 2684out_put:
e214a0fe 2685 put_qp_write(qp);
bc38a6ab
RD		 2686
2687 return ret ? ret : in_len;
2688}
f520ba5a 2689
b68c9560 2690static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
436f2ad0
HHZ		 2691 union ib_flow_spec *ib_spec)
2692{
c780d82a
YD		 2693 if (kern_spec->reserved)
2694 return -EINVAL;
2695
436f2ad0
HHZ		 2696 ib_spec->type = kern_spec->type;
2697
2698 switch (ib_spec->type) {
2699 case IB_FLOW_SPEC_ETH:
2700 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
2701 if (ib_spec->eth.size != kern_spec->eth.size)
2702 return -EINVAL;
2703 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
2704 sizeof(struct ib_flow_eth_filter));
2705 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
2706 sizeof(struct ib_flow_eth_filter));
2707 break;
2708 case IB_FLOW_SPEC_IPV4:
2709 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
2710 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
2711 return -EINVAL;
2712 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
2713 sizeof(struct ib_flow_ipv4_filter));
2714 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
2715 sizeof(struct ib_flow_ipv4_filter));
2716 break;
2717 case IB_FLOW_SPEC_TCP:
2718 case IB_FLOW_SPEC_UDP:
2719 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
2720 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
2721 return -EINVAL;
2722 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
2723 sizeof(struct ib_flow_tcp_udp_filter));
2724 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
2725 sizeof(struct ib_flow_tcp_udp_filter));
2726 break;
2727 default:
2728 return -EINVAL;
2729 }
2730 return 0;
2731}
2732
f21519b2
YD		 2733int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
2734 struct ib_udata *ucore,
2735 struct ib_udata *uhw)
436f2ad0
HHZ		 2736{
2737 struct ib_uverbs_create_flow cmd;
2738 struct ib_uverbs_create_flow_resp resp;
2739 struct ib_uobject *uobj;
2740 struct ib_flow *flow_id;
d82693da 2741 struct ib_uverbs_flow_attr *kern_flow_attr;
436f2ad0
HHZ		 2742 struct ib_flow_attr *flow_attr;
2743 struct ib_qp *qp;
2744 int err = 0;
2745 void *kern_spec;
2746 void *ib_spec;
2747 int i;
436f2ad0 2748
6bcca3d4
YD		 2749 if (ucore->inlen < sizeof(cmd))
2750 return -EINVAL;
2751
f21519b2 2752 if (ucore->outlen < sizeof(resp))
436f2ad0
HHZ		 2753 return -ENOSPC;
2754
f21519b2
YD		 2755 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2756 if (err)
2757 return err;
2758
2759 ucore->inbuf += sizeof(cmd);
2760 ucore->inlen -= sizeof(cmd);
436f2ad0 2761
22878dbc
MB		 2762 if (cmd.comp_mask)
2763 return -EINVAL;
2764
436f2ad0
HHZ		 2765 if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
2766 !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
2767 return -EPERM;
2768
f8848274 2769 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
22878dbc
MB		 2770 return -EINVAL;
2771
f21519b2 2772 if (cmd.flow_attr.size > ucore->inlen ||
f8848274 2773 cmd.flow_attr.size >
b68c9560 2774 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
22878dbc
MB		 2775 return -EINVAL;
2776
c780d82a
YD		 2777 if (cmd.flow_attr.reserved[0] ||
2778 cmd.flow_attr.reserved[1])
2779 return -EINVAL;
2780
436f2ad0 2781 if (cmd.flow_attr.num_of_specs) {
f8848274
MB		 2782 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
2783 GFP_KERNEL);
436f2ad0
HHZ		 2784 if (!kern_flow_attr)
2785 return -ENOMEM;
2786
2787 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
f21519b2
YD		 2788 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
2789 cmd.flow_attr.size);
2790 if (err)
436f2ad0 2791 goto err_free_attr;
436f2ad0
HHZ		 2792 } else {
2793 kern_flow_attr = &cmd.flow_attr;
436f2ad0
HHZ		 2794 }
2795
2796 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
2797 if (!uobj) {
2798 err = -ENOMEM;
2799 goto err_free_attr;
2800 }
2801 init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
2802 down_write(&uobj->mutex);
2803
2804 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2805 if (!qp) {
2806 err = -EINVAL;
2807 goto err_uobj;
2808 }
2809
f8848274 2810 flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL);
436f2ad0
HHZ		 2811 if (!flow_attr) {
2812 err = -ENOMEM;
2813 goto err_put;
2814 }
2815
2816 flow_attr->type = kern_flow_attr->type;
2817 flow_attr->priority = kern_flow_attr->priority;
2818 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
2819 flow_attr->port = kern_flow_attr->port;
2820 flow_attr->flags = kern_flow_attr->flags;
2821 flow_attr->size = sizeof(*flow_attr);
2822
2823 kern_spec = kern_flow_attr + 1;
2824 ib_spec = flow_attr + 1;
f8848274 2825 for (i = 0; i < flow_attr->num_of_specs &&
b68c9560 2826 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
f8848274 2827 cmd.flow_attr.size >=
b68c9560 2828 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
436f2ad0
HHZ		 2829 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
2830 if (err)
2831 goto err_free;
2832 flow_attr->size +=
2833 ((union ib_flow_spec *) ib_spec)->size;
b68c9560
YD		 2834 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
2835 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
436f2ad0
HHZ		 2836 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
2837 }
f8848274
MB		 2838 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
2839 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
2840 i, cmd.flow_attr.size);
98a37510 2841 err = -EINVAL;
436f2ad0
HHZ		 2842 goto err_free;
2843 }
2844 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
2845 if (IS_ERR(flow_id)) {
2846 err = PTR_ERR(flow_id);
2847 goto err_free;
2848 }
2849 flow_id->qp = qp;
2850 flow_id->uobject = uobj;
2851 uobj->object = flow_id;
2852
2853 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
2854 if (err)
2855 goto destroy_flow;
2856
2857 memset(&resp, 0, sizeof(resp));
2858 resp.flow_handle = uobj->id;
2859
f21519b2
YD		 2860 err = ib_copy_to_udata(ucore,
2861 &resp, sizeof(resp));
2862 if (err)
436f2ad0 2863 goto err_copy;
436f2ad0
HHZ		 2864
2865 put_qp_read(qp);
2866 mutex_lock(&file->mutex);
2867 list_add_tail(&uobj->list, &file->ucontext->rule_list);
2868 mutex_unlock(&file->mutex);
2869
2870 uobj->live = 1;
2871
2872 up_write(&uobj->mutex);
2873 kfree(flow_attr);
2874 if (cmd.flow_attr.num_of_specs)
2875 kfree(kern_flow_attr);
f21519b2 2876 return 0;
436f2ad0
HHZ		 2877err_copy:
2878 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
2879destroy_flow:
2880 ib_destroy_flow(flow_id);
2881err_free:
2882 kfree(flow_attr);
2883err_put:
2884 put_qp_read(qp);
2885err_uobj:
2886 put_uobj_write(uobj);
2887err_free_attr:
2888 if (cmd.flow_attr.num_of_specs)
2889 kfree(kern_flow_attr);
2890 return err;
2891}
2892
f21519b2
YD		 2893int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
2894 struct ib_udata *ucore,
2895 struct ib_udata *uhw)
2896{
436f2ad0
HHZ		 2897 struct ib_uverbs_destroy_flow cmd;
2898 struct ib_flow *flow_id;
2899 struct ib_uobject *uobj;
2900 int ret;
2901
6bcca3d4
YD		 2902 if (ucore->inlen < sizeof(cmd))
2903 return -EINVAL;
2904
f21519b2
YD		 2905 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2906 if (ret)
2907 return ret;
436f2ad0 2908
2782c2d3
YD		 2909 if (cmd.comp_mask)
2910 return -EINVAL;
2911
436f2ad0
HHZ		 2912 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
2913 file->ucontext);
2914 if (!uobj)
2915 return -EINVAL;
2916 flow_id = uobj->object;
2917
2918 ret = ib_destroy_flow(flow_id);
2919 if (!ret)
2920 uobj->live = 0;
2921
2922 put_uobj_write(uobj);
2923
2924 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
2925
2926 mutex_lock(&file->mutex);
2927 list_del(&uobj->list);
2928 mutex_unlock(&file->mutex);
2929
2930 put_uobj(uobj);
2931
f21519b2 2932 return ret;
436f2ad0
HHZ		 2933}
2934
c89d1bed
SH		 2935static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
2936 struct ib_uverbs_create_xsrq *cmd,
2937 struct ib_udata *udata)
f520ba5a 2938{
f520ba5a 2939 struct ib_uverbs_create_srq_resp resp;
8541f8de 2940 struct ib_usrq_object *obj;
f520ba5a
RD		 2941 struct ib_pd *pd;
2942 struct ib_srq *srq;
8541f8de 2943 struct ib_uobject *uninitialized_var(xrcd_uobj);
f520ba5a
RD		 2944 struct ib_srq_init_attr attr;
2945 int ret;
2946
9ead190b
RD		 2947 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2948 if (!obj)
f520ba5a
RD		 2949 return -ENOMEM;
2950
3bea57a5 2951 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
8541f8de 2952 down_write(&obj->uevent.uobject.mutex);
f520ba5a 2953
8541f8de 2954 if (cmd->srq_type == IB_SRQT_XRC) {
8541f8de
SH		 2955 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
2956 if (!attr.ext.xrc.xrcd) {
2957 ret = -EINVAL;
5909ce54 2958 goto err;
8541f8de
SH		 2959 }
2960
2961 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2962 atomic_inc(&obj->uxrcd->refcnt);
5909ce54
RD		 2963
2964 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
2965 if (!attr.ext.xrc.cq) {
2966 ret = -EINVAL;
2967 goto err_put_xrcd;
2968 }
2969 }
2970
2971 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
2972 if (!pd) {
2973 ret = -EINVAL;
2974 goto err_put_cq;
8541f8de
SH		 2975 }
2976
f520ba5a
RD		 2977 attr.event_handler = ib_uverbs_srq_event_handler;
2978 attr.srq_context = file;
8541f8de
SH		 2979 attr.srq_type = cmd->srq_type;
2980 attr.attr.max_wr = cmd->max_wr;
2981 attr.attr.max_sge = cmd->max_sge;
2982 attr.attr.srq_limit = cmd->srq_limit;
f520ba5a 2983
8541f8de
SH		 2984 obj->uevent.events_reported = 0;
2985 INIT_LIST_HEAD(&obj->uevent.event_list);
f520ba5a 2986
8541f8de 2987 srq = pd->device->create_srq(pd, &attr, udata);
f520ba5a
RD		 2988 if (IS_ERR(srq)) {
2989 ret = PTR_ERR(srq);
ec924b47 2990 goto err_put;
f520ba5a
RD		 2991 }
2992
8541f8de
SH		 2993 srq->device = pd->device;
2994 srq->pd = pd;
2995 srq->srq_type = cmd->srq_type;
2996 srq->uobject = &obj->uevent.uobject;
f520ba5a
RD		 2997 srq->event_handler = attr.event_handler;
2998 srq->srq_context = attr.srq_context;
8541f8de
SH		 2999
3000 if (cmd->srq_type == IB_SRQT_XRC) {
3001 srq->ext.xrc.cq = attr.ext.xrc.cq;
3002 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3003 atomic_inc(&attr.ext.xrc.cq->usecnt);
3004 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3005 }
3006
f520ba5a
RD		 3007 atomic_inc(&pd->usecnt);
3008 atomic_set(&srq->usecnt, 0);
3009
8541f8de
SH		 3010 obj->uevent.uobject.object = srq;
3011 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
f520ba5a
RD		 3012 if (ret)
3013 goto err_destroy;
3014
9ead190b 3015 memset(&resp, 0, sizeof resp);
8541f8de 3016 resp.srq_handle = obj->uevent.uobject.id;
ea88fd16
DB		 3017 resp.max_wr = attr.attr.max_wr;
3018 resp.max_sge = attr.attr.max_sge;
8541f8de
SH		 3019 if (cmd->srq_type == IB_SRQT_XRC)
3020 resp.srqn = srq->ext.xrc.srq_num;
f520ba5a 3021
8541f8de 3022 if (copy_to_user((void __user *) (unsigned long) cmd->response,
f520ba5a
RD		 3023 &resp, sizeof resp)) {
3024 ret = -EFAULT;
9ead190b 3025 goto err_copy;
f520ba5a
RD		 3026 }
3027
8541f8de
SH		 3028 if (cmd->srq_type == IB_SRQT_XRC) {
3029 put_uobj_read(xrcd_uobj);
3030 put_cq_read(attr.ext.xrc.cq);
3031 }
9ead190b
RD		 3032 put_pd_read(pd);
3033
95ed644f 3034 mutex_lock(&file->mutex);
8541f8de 3035 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
95ed644f 3036 mutex_unlock(&file->mutex);
eb9d3cd5 3037
8541f8de 3038 obj->uevent.uobject.live = 1;
9ead190b 3039
8541f8de 3040 up_write(&obj->uevent.uobject.mutex);
f520ba5a 3041
8541f8de 3042 return 0;
f520ba5a 3043
9ead190b 3044err_copy:
8541f8de 3045 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
f520ba5a
RD		 3046
3047err_destroy:
3048 ib_destroy_srq(srq);
3049
ec924b47 3050err_put:
5909ce54 3051 put_pd_read(pd);
8541f8de
SH		 3052
3053err_put_cq:
3054 if (cmd->srq_type == IB_SRQT_XRC)
3055 put_cq_read(attr.ext.xrc.cq);
3056
5909ce54
RD		 3057err_put_xrcd:
3058 if (cmd->srq_type == IB_SRQT_XRC) {
3059 atomic_dec(&obj->uxrcd->refcnt);
3060 put_uobj_read(xrcd_uobj);
3061 }
ec924b47 3062
9ead190b 3063err:
8541f8de 3064 put_uobj_write(&obj->uevent.uobject);
f520ba5a
RD		 3065 return ret;
3066}
3067
8541f8de
SH		 3068ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3069 const char __user *buf, int in_len,
3070 int out_len)
3071{
3072 struct ib_uverbs_create_srq cmd;
3073 struct ib_uverbs_create_xsrq xcmd;
3074 struct ib_uverbs_create_srq_resp resp;
3075 struct ib_udata udata;
3076 int ret;
3077
3078 if (out_len < sizeof resp)
3079 return -ENOSPC;
3080
3081 if (copy_from_user(&cmd, buf, sizeof cmd))
3082 return -EFAULT;
3083
3084 xcmd.response = cmd.response;
3085 xcmd.user_handle = cmd.user_handle;
3086 xcmd.srq_type = IB_SRQT_BASIC;
3087 xcmd.pd_handle = cmd.pd_handle;
3088 xcmd.max_wr = cmd.max_wr;
3089 xcmd.max_sge = cmd.max_sge;
3090 xcmd.srq_limit = cmd.srq_limit;
3091
3092 INIT_UDATA(&udata, buf + sizeof cmd,
3093 (unsigned long) cmd.response + sizeof resp,
3094 in_len - sizeof cmd, out_len - sizeof resp);
3095
3096 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
3097 if (ret)
3098 return ret;
3099
3100 return in_len;
3101}
3102
3103ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3104 const char __user *buf, int in_len, int out_len)
3105{
3106 struct ib_uverbs_create_xsrq cmd;
3107 struct ib_uverbs_create_srq_resp resp;
3108 struct ib_udata udata;
3109 int ret;
3110
3111 if (out_len < sizeof resp)
3112 return -ENOSPC;
3113
3114 if (copy_from_user(&cmd, buf, sizeof cmd))
3115 return -EFAULT;
3116
3117 INIT_UDATA(&udata, buf + sizeof cmd,
3118 (unsigned long) cmd.response + sizeof resp,
3119 in_len - sizeof cmd, out_len - sizeof resp);
3120
3121 ret = __uverbs_create_xsrq(file, &cmd, &udata);
3122 if (ret)
3123 return ret;
3124
3125 return in_len;
3126}
3127
f520ba5a
RD		 3128ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3129 const char __user *buf, int in_len,
3130 int out_len)
3131{
3132 struct ib_uverbs_modify_srq cmd;
9bc57e2d 3133 struct ib_udata udata;
f520ba5a
RD		 3134 struct ib_srq *srq;
3135 struct ib_srq_attr attr;
3136 int ret;
3137
3138 if (copy_from_user(&cmd, buf, sizeof cmd))
3139 return -EFAULT;
3140
9bc57e2d
RC		 3141 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3142 out_len);
3143
9ead190b
RD		 3144 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3145 if (!srq)
3146 return -EINVAL;
f520ba5a
RD		 3147
3148 attr.max_wr = cmd.max_wr;
f520ba5a
RD		 3149 attr.srq_limit = cmd.srq_limit;
3150
9bc57e2d 3151 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
f520ba5a 3152
9ead190b 3153 put_srq_read(srq);
f520ba5a
RD		 3154
3155 return ret ? ret : in_len;
3156}
3157
8bdb0e86
DB		 3158ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3159 const char __user *buf,
3160 int in_len, int out_len)
3161{
3162 struct ib_uverbs_query_srq cmd;
3163 struct ib_uverbs_query_srq_resp resp;
3164 struct ib_srq_attr attr;
3165 struct ib_srq *srq;
3166 int ret;
3167
3168 if (out_len < sizeof resp)
3169 return -ENOSPC;
3170
3171 if (copy_from_user(&cmd, buf, sizeof cmd))
3172 return -EFAULT;
3173
9ead190b
RD		 3174 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3175 if (!srq)
3176 return -EINVAL;
8bdb0e86 3177
9ead190b 3178 ret = ib_query_srq(srq, &attr);
8bdb0e86 3179
9ead190b 3180 put_srq_read(srq);
8bdb0e86
DB		 3181
3182 if (ret)
9ead190b 3183 return ret;
8bdb0e86
DB		 3184
3185 memset(&resp, 0, sizeof resp);
3186
3187 resp.max_wr = attr.max_wr;
3188 resp.max_sge = attr.max_sge;
3189 resp.srq_limit = attr.srq_limit;
3190
3191 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3192 &resp, sizeof resp))
9ead190b 3193 return -EFAULT;
8bdb0e86 3194
9ead190b 3195 return in_len;
8bdb0e86
DB		 3196}
3197
f520ba5a
RD		 3198ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3199 const char __user *buf, int in_len,
3200 int out_len)
3201{
63aaf647
RD		 3202 struct ib_uverbs_destroy_srq cmd;
3203 struct ib_uverbs_destroy_srq_resp resp;
9ead190b 3204 struct ib_uobject *uobj;
63aaf647 3205 struct ib_srq *srq;
9ead190b 3206 struct ib_uevent_object *obj;
63aaf647 3207 int ret = -EINVAL;
846be90d
YH		 3208 struct ib_usrq_object *us;
3209 enum ib_srq_type srq_type;
f520ba5a
RD		 3210
3211 if (copy_from_user(&cmd, buf, sizeof cmd))
3212 return -EFAULT;
3213
9ead190b
RD		 3214 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3215 if (!uobj)
3216 return -EINVAL;
3217 srq = uobj->object;
3218 obj = container_of(uobj, struct ib_uevent_object, uobject);
846be90d 3219 srq_type = srq->srq_type;
63aaf647 3220
9ead190b
RD		 3221 ret = ib_destroy_srq(srq);
3222 if (!ret)
3223 uobj->live = 0;
f520ba5a 3224
9ead190b 3225 put_uobj_write(uobj);
f520ba5a 3226
f520ba5a 3227 if (ret)
9ead190b 3228 return ret;
f520ba5a 3229
846be90d
YH		 3230 if (srq_type == IB_SRQT_XRC) {
3231 us = container_of(obj, struct ib_usrq_object, uevent);
3232 atomic_dec(&us->uxrcd->refcnt);
3233 }
3234
9ead190b 3235 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
f520ba5a 3236
95ed644f 3237 mutex_lock(&file->mutex);
9ead190b 3238 list_del(&uobj->list);
95ed644f 3239 mutex_unlock(&file->mutex);
f520ba5a 3240
9ead190b 3241 ib_uverbs_release_uevent(file, obj);
63aaf647 3242
9ead190b
RD		 3243 memset(&resp, 0, sizeof resp);
3244 resp.events_reported = obj->events_reported;
63aaf647 3245
9ead190b 3246 put_uobj(uobj);
f520ba5a 3247
63aaf647
RD		 3248 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3249 &resp, sizeof resp))
3250 ret = -EFAULT;
3251
f520ba5a
RD		 3252 return ret ? ret : in_len;
3253}
Linux 6.x block layer and io_uring tree(s)