projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
new helper: file_inode(file)
[linux-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"
43
3bea57a5
RD		 44struct uverbs_lock_class {
45 struct lock_class_key key;
46 char name[16];
47};
48
49static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" };
50static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" };
51static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" };
52static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" };
53static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" };
54static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" };
55static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
43db2bc0 56
bc38a6ab
RD		 57#define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
58 do { \
59 (udata)->inbuf = (void __user *) (ibuf); \
60 (udata)->outbuf = (void __user *) (obuf); \
61 (udata)->inlen = (ilen); \
62 (udata)->outlen = (olen); \
63 } while (0)
64
9ead190b
RD		 65/*
66 * The ib_uobject locking scheme is as follows:
67 *
68 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
69 * needs to be held during all idr operations. When an object is
70 * looked up, a reference must be taken on the object's kref before
71 * dropping this lock.
72 *
73 * - Each object also has an rwsem. This rwsem must be held for
74 * reading while an operation that uses the object is performed.
75 * For example, while registering an MR, the associated PD's
76 * uobject.mutex must be held for reading. The rwsem must be held
77 * for writing while initializing or destroying an object.
78 *
79 * - In addition, each object has a "live" flag. If this flag is not
80 * set, then lookups of the object will fail even if it is found in
81 * the idr. This handles a reader that blocks and does not acquire
82 * the rwsem until after the object is destroyed. The destroy
83 * operation will set the live flag to 0 and then drop the rwsem;
84 * this will allow the reader to acquire the rwsem, see that the
85 * live flag is 0, and then drop the rwsem and its reference to
86 * object. The underlying storage will not be freed until the last
87 * reference to the object is dropped.
88 */
89
90static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
3bea57a5 91 struct ib_ucontext *context, struct uverbs_lock_class *c)
9ead190b
RD		 92{
93 uobj->user_handle = user_handle;
94 uobj->context = context;
95 kref_init(&uobj->ref);
96 init_rwsem(&uobj->mutex);
3bea57a5 97 lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
9ead190b
RD		 98 uobj->live = 0;
99}
100
101static void release_uobj(struct kref *kref)
102{
103 kfree(container_of(kref, struct ib_uobject, ref));
104}
105
106static void put_uobj(struct ib_uobject *uobj)
107{
108 kref_put(&uobj->ref, release_uobj);
109}
110
111static void put_uobj_read(struct ib_uobject *uobj)
112{
113 up_read(&uobj->mutex);
114 put_uobj(uobj);
115}
116
117static void put_uobj_write(struct ib_uobject *uobj)
118{
119 up_write(&uobj->mutex);
120 put_uobj(uobj);
121}
122
123static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
3463175d
RD		 124{
125 int ret;
126
127retry:
128 if (!idr_pre_get(idr, GFP_KERNEL))
129 return -ENOMEM;
130
9ead190b 131 spin_lock(&ib_uverbs_idr_lock);
3463175d 132 ret = idr_get_new(idr, uobj, &uobj->id);
9ead190b 133 spin_unlock(&ib_uverbs_idr_lock);
3463175d
RD		 134
135 if (ret == -EAGAIN)
136 goto retry;
137
138 return ret;
139}
140
9ead190b
RD		 141void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
142{
143 spin_lock(&ib_uverbs_idr_lock);
144 idr_remove(idr, uobj->id);
145 spin_unlock(&ib_uverbs_idr_lock);
146}
147
148static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
149 struct ib_ucontext *context)
150{
151 struct ib_uobject *uobj;
152
153 spin_lock(&ib_uverbs_idr_lock);
154 uobj = idr_find(idr, id);
cbfb50e6
RD		 155 if (uobj) {
156 if (uobj->context == context)
157 kref_get(&uobj->ref);
158 else
159 uobj = NULL;
160 }
9ead190b
RD		 161 spin_unlock(&ib_uverbs_idr_lock);
162
163 return uobj;
164}
165
166static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
1ccf6aa1 167 struct ib_ucontext *context, int nested)
9ead190b
RD		 168{
169 struct ib_uobject *uobj;
170
171 uobj = __idr_get_uobj(idr, id, context);
172 if (!uobj)
173 return NULL;
174
1ccf6aa1
RD		 175 if (nested)
176 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
177 else
178 down_read(&uobj->mutex);
9ead190b
RD		 179 if (!uobj->live) {
180 put_uobj_read(uobj);
181 return NULL;
182 }
183
184 return uobj;
185}
186
187static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
188 struct ib_ucontext *context)
189{
190 struct ib_uobject *uobj;
191
192 uobj = __idr_get_uobj(idr, id, context);
193 if (!uobj)
194 return NULL;
195
196 down_write(&uobj->mutex);
197 if (!uobj->live) {
198 put_uobj_write(uobj);
199 return NULL;
200 }
201
202 return uobj;
203}
204
1ccf6aa1
RD		 205static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
206 int nested)
9ead190b
RD		 207{
208 struct ib_uobject *uobj;
209
1ccf6aa1 210 uobj = idr_read_uobj(idr, id, context, nested);
9ead190b
RD		 211 return uobj ? uobj->object : NULL;
212}
213
214static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
215{
1ccf6aa1 216 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
9ead190b
RD		 217}
218
219static void put_pd_read(struct ib_pd *pd)
220{
221 put_uobj_read(pd->uobject);
222}
223
1ccf6aa1 224static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
9ead190b 225{
1ccf6aa1 226 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
9ead190b
RD		 227}
228
229static void put_cq_read(struct ib_cq *cq)
230{
231 put_uobj_read(cq->uobject);
232}
233
234static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
235{
1ccf6aa1 236 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
9ead190b
RD		 237}
238
239static void put_ah_read(struct ib_ah *ah)
240{
241 put_uobj_read(ah->uobject);
242}
243
244static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
245{
1ccf6aa1 246 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
9ead190b
RD		 247}
248
e214a0fe
EC		 249static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context)
250{
251 struct ib_uobject *uobj;
252
253 uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context);
254 return uobj ? uobj->object : NULL;
255}
256
9ead190b
RD		 257static void put_qp_read(struct ib_qp *qp)
258{
259 put_uobj_read(qp->uobject);
260}
261
e214a0fe
EC		 262static void put_qp_write(struct ib_qp *qp)
263{
264 put_uobj_write(qp->uobject);
265}
266
9ead190b
RD		 267static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
268{
1ccf6aa1 269 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
9ead190b
RD		 270}
271
272static void put_srq_read(struct ib_srq *srq)
273{
274 put_uobj_read(srq->uobject);
275}
276
53d0bd1e
SH		 277static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
278 struct ib_uobject **uobj)
279{
280 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
281 return *uobj ? (*uobj)->object : NULL;
282}
283
284static void put_xrcd_read(struct ib_uobject *uobj)
285{
286 put_uobj_read(uobj);
287}
288
bc38a6ab
RD		 289ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
290 const char __user *buf,
291 int in_len, int out_len)
292{
293 struct ib_uverbs_get_context cmd;
294 struct ib_uverbs_get_context_resp resp;
295 struct ib_udata udata;
296 struct ib_device *ibdev = file->device->ib_dev;
63c47c28 297 struct ib_ucontext *ucontext;
6b73597e 298 struct file *filp;
63c47c28 299 int ret;
bc38a6ab
RD		 300
301 if (out_len < sizeof resp)
302 return -ENOSPC;
303
304 if (copy_from_user(&cmd, buf, sizeof cmd))
305 return -EFAULT;
306
95ed644f 307 mutex_lock(&file->mutex);
63c47c28
RD		 308
309 if (file->ucontext) {
310 ret = -EINVAL;
311 goto err;
312 }
313
bc38a6ab
RD		 314 INIT_UDATA(&udata, buf + sizeof cmd,
315 (unsigned long) cmd.response + sizeof resp,
316 in_len - sizeof cmd, out_len - sizeof resp);
317
63c47c28 318 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
77f76013 319 if (IS_ERR(ucontext)) {
df42245a 320 ret = PTR_ERR(ucontext);
77f76013
GC		 321 goto err;
322 }
bc38a6ab 323
63c47c28
RD		 324 ucontext->device = ibdev;
325 INIT_LIST_HEAD(&ucontext->pd_list);
326 INIT_LIST_HEAD(&ucontext->mr_list);
327 INIT_LIST_HEAD(&ucontext->mw_list);
328 INIT_LIST_HEAD(&ucontext->cq_list);
329 INIT_LIST_HEAD(&ucontext->qp_list);
330 INIT_LIST_HEAD(&ucontext->srq_list);
331 INIT_LIST_HEAD(&ucontext->ah_list);
53d0bd1e 332 INIT_LIST_HEAD(&ucontext->xrcd_list);
f7c6a7b5 333 ucontext->closing = 0;
bc38a6ab 334
6b73597e
RD		 335 resp.num_comp_vectors = file->device->num_comp_vectors;
336
b1e4594b
AV		 337 ret = get_unused_fd();
338 if (ret < 0)
339 goto err_free;
340 resp.async_fd = ret;
341
342 filp = ib_uverbs_alloc_event_file(file, 1);
6b73597e
RD		 343 if (IS_ERR(filp)) {
344 ret = PTR_ERR(filp);
b1e4594b 345 goto err_fd;
6b73597e 346 }
bc38a6ab
RD		 347
348 if (copy_to_user((void __user *) (unsigned long) cmd.response,
63c47c28
RD		 349 &resp, sizeof resp)) {
350 ret = -EFAULT;
6b73597e 351 goto err_file;
63c47c28
RD		 352 }
353
6b73597e
RD		 354 file->async_file = filp->private_data;
355
356 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
357 ib_uverbs_event_handler);
358 ret = ib_register_event_handler(&file->event_handler);
359 if (ret)
360 goto err_file;
361
362 kref_get(&file->async_file->ref);
363 kref_get(&file->ref);
70a30e16 364 file->ucontext = ucontext;
6b73597e
RD		 365
366 fd_install(resp.async_fd, filp);
367
95ed644f 368 mutex_unlock(&file->mutex);
bc38a6ab
RD		 369
370 return in_len;
371
6b73597e 372err_file:
6b73597e
RD		 373 fput(filp);
374
b1e4594b
AV		 375err_fd:
376 put_unused_fd(resp.async_fd);
377
63c47c28
RD		 378err_free:
379 ibdev->dealloc_ucontext(ucontext);
bc38a6ab 380
63c47c28 381err:
95ed644f 382 mutex_unlock(&file->mutex);
63c47c28 383 return ret;
bc38a6ab
RD		 384}
385
386ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
387 const char __user *buf,
388 int in_len, int out_len)
389{
390 struct ib_uverbs_query_device cmd;
391 struct ib_uverbs_query_device_resp resp;
392 struct ib_device_attr attr;
393 int ret;
394
395 if (out_len < sizeof resp)
396 return -ENOSPC;
397
398 if (copy_from_user(&cmd, buf, sizeof cmd))
399 return -EFAULT;
400
401 ret = ib_query_device(file->device->ib_dev, &attr);
402 if (ret)
403 return ret;
404
405 memset(&resp, 0, sizeof resp);
406
407 resp.fw_ver = attr.fw_ver;
cf311cd4 408 resp.node_guid = file->device->ib_dev->node_guid;
bc38a6ab
RD		 409 resp.sys_image_guid = attr.sys_image_guid;
410 resp.max_mr_size = attr.max_mr_size;
411 resp.page_size_cap = attr.page_size_cap;
412 resp.vendor_id = attr.vendor_id;
413 resp.vendor_part_id = attr.vendor_part_id;
414 resp.hw_ver = attr.hw_ver;
415 resp.max_qp = attr.max_qp;
416 resp.max_qp_wr = attr.max_qp_wr;
417 resp.device_cap_flags = attr.device_cap_flags;
418 resp.max_sge = attr.max_sge;
419 resp.max_sge_rd = attr.max_sge_rd;
420 resp.max_cq = attr.max_cq;
421 resp.max_cqe = attr.max_cqe;
422 resp.max_mr = attr.max_mr;
423 resp.max_pd = attr.max_pd;
424 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
425 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
426 resp.max_res_rd_atom = attr.max_res_rd_atom;
427 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
428 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
429 resp.atomic_cap = attr.atomic_cap;
430 resp.max_ee = attr.max_ee;
431 resp.max_rdd = attr.max_rdd;
432 resp.max_mw = attr.max_mw;
433 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
434 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
435 resp.max_mcast_grp = attr.max_mcast_grp;
436 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
437 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
438 resp.max_ah = attr.max_ah;
439 resp.max_fmr = attr.max_fmr;
440 resp.max_map_per_fmr = attr.max_map_per_fmr;
441 resp.max_srq = attr.max_srq;
442 resp.max_srq_wr = attr.max_srq_wr;
443 resp.max_srq_sge = attr.max_srq_sge;
444 resp.max_pkeys = attr.max_pkeys;
445 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
446 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
447
448 if (copy_to_user((void __user *) (unsigned long) cmd.response,
449 &resp, sizeof resp))
450 return -EFAULT;
451
452 return in_len;
453}
454
455ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
456 const char __user *buf,
457 int in_len, int out_len)
458{
459 struct ib_uverbs_query_port cmd;
460 struct ib_uverbs_query_port_resp resp;
461 struct ib_port_attr attr;
462 int ret;
463
464 if (out_len < sizeof resp)
465 return -ENOSPC;
466
467 if (copy_from_user(&cmd, buf, sizeof cmd))
468 return -EFAULT;
469
470 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
471 if (ret)
472 return ret;
473
474 memset(&resp, 0, sizeof resp);
475
476 resp.state = attr.state;
477 resp.max_mtu = attr.max_mtu;
478 resp.active_mtu = attr.active_mtu;
479 resp.gid_tbl_len = attr.gid_tbl_len;
480 resp.port_cap_flags = attr.port_cap_flags;
481 resp.max_msg_sz = attr.max_msg_sz;
482 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
483 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
484 resp.pkey_tbl_len = attr.pkey_tbl_len;
485 resp.lid = attr.lid;
486 resp.sm_lid = attr.sm_lid;
487 resp.lmc = attr.lmc;
488 resp.max_vl_num = attr.max_vl_num;
489 resp.sm_sl = attr.sm_sl;
490 resp.subnet_timeout = attr.subnet_timeout;
491 resp.init_type_reply = attr.init_type_reply;
492 resp.active_width = attr.active_width;
493 resp.active_speed = attr.active_speed;
494 resp.phys_state = attr.phys_state;
2420b60b
EC		 495 resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev,
496 cmd.port_num);
bc38a6ab
RD		 497
498 if (copy_to_user((void __user *) (unsigned long) cmd.response,
499 &resp, sizeof resp))
500 return -EFAULT;
501
502 return in_len;
503}
504
bc38a6ab
RD		 505ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
506 const char __user *buf,
507 int in_len, int out_len)
508{
509 struct ib_uverbs_alloc_pd cmd;
510 struct ib_uverbs_alloc_pd_resp resp;
511 struct ib_udata udata;
512 struct ib_uobject *uobj;
513 struct ib_pd *pd;
514 int ret;
515
516 if (out_len < sizeof resp)
517 return -ENOSPC;
518
519 if (copy_from_user(&cmd, buf, sizeof cmd))
520 return -EFAULT;
521
522 INIT_UDATA(&udata, buf + sizeof cmd,
523 (unsigned long) cmd.response + sizeof resp,
524 in_len - sizeof cmd, out_len - sizeof resp);
525
526 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
527 if (!uobj)
528 return -ENOMEM;
529
3bea57a5 530 init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
9ead190b 531 down_write(&uobj->mutex);
bc38a6ab
RD		 532
533 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
534 file->ucontext, &udata);
535 if (IS_ERR(pd)) {
536 ret = PTR_ERR(pd);
537 goto err;
538 }
539
540 pd->device = file->device->ib_dev;
541 pd->uobject = uobj;
542 atomic_set(&pd->usecnt, 0);
543
9ead190b
RD		 544 uobj->object = pd;
545 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
bc38a6ab 546 if (ret)
9ead190b 547 goto err_idr;
bc38a6ab
RD		 548
549 memset(&resp, 0, sizeof resp);
550 resp.pd_handle = uobj->id;
551
552 if (copy_to_user((void __user *) (unsigned long) cmd.response,
553 &resp, sizeof resp)) {
554 ret = -EFAULT;
9ead190b 555 goto err_copy;
bc38a6ab
RD		 556 }
557
95ed644f 558 mutex_lock(&file->mutex);
eb9d3cd5 559 list_add_tail(&uobj->list, &file->ucontext->pd_list);
95ed644f 560 mutex_unlock(&file->mutex);
bc38a6ab 561
9ead190b
RD		 562 uobj->live = 1;
563
564 up_write(&uobj->mutex);
bc38a6ab 565
eb9d3cd5
RD		 566 return in_len;
567
9ead190b
RD		 568err_copy:
569 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
eb9d3cd5 570
9ead190b 571err_idr:
bc38a6ab
RD		 572 ib_dealloc_pd(pd);
573
574err:
9ead190b 575 put_uobj_write(uobj);
bc38a6ab
RD		 576 return ret;
577}
578
579ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
580 const char __user *buf,
581 int in_len, int out_len)
582{
583 struct ib_uverbs_dealloc_pd cmd;
bc38a6ab 584 struct ib_uobject *uobj;
9ead190b 585 int ret;
bc38a6ab
RD		 586
587 if (copy_from_user(&cmd, buf, sizeof cmd))
588 return -EFAULT;
589
9ead190b
RD		 590 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
591 if (!uobj)
592 return -EINVAL;
bc38a6ab 593
9ead190b
RD		 594 ret = ib_dealloc_pd(uobj->object);
595 if (!ret)
596 uobj->live = 0;
bc38a6ab 597
9ead190b 598 put_uobj_write(uobj);
bc38a6ab 599
bc38a6ab 600 if (ret)
9ead190b 601 return ret;
bc38a6ab 602
9ead190b 603 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
bc38a6ab 604
95ed644f 605 mutex_lock(&file->mutex);
bc38a6ab 606 list_del(&uobj->list);
95ed644f 607 mutex_unlock(&file->mutex);
bc38a6ab 608
9ead190b 609 put_uobj(uobj);
bc38a6ab 610
9ead190b 611 return in_len;
bc38a6ab
RD		 612}
613
53d0bd1e
SH		 614struct xrcd_table_entry {
615 struct rb_node node;
616 struct ib_xrcd *xrcd;
617 struct inode *inode;
618};
619
620static int xrcd_table_insert(struct ib_uverbs_device *dev,
621 struct inode *inode,
622 struct ib_xrcd *xrcd)
623{
624 struct xrcd_table_entry *entry, *scan;
625 struct rb_node **p = &dev->xrcd_tree.rb_node;
626 struct rb_node *parent = NULL;
627
628 entry = kmalloc(sizeof *entry, GFP_KERNEL);
629 if (!entry)
630 return -ENOMEM;
631
632 entry->xrcd = xrcd;
633 entry->inode = inode;
634
635 while (*p) {
636 parent = *p;
637 scan = rb_entry(parent, struct xrcd_table_entry, node);
638
639 if (inode < scan->inode) {
640 p = &(*p)->rb_left;
641 } else if (inode > scan->inode) {
642 p = &(*p)->rb_right;
643 } else {
644 kfree(entry);
645 return -EEXIST;
646 }
647 }
648
649 rb_link_node(&entry->node, parent, p);
650 rb_insert_color(&entry->node, &dev->xrcd_tree);
651 igrab(inode);
652 return 0;
653}
654
655static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
656 struct inode *inode)
657{
658 struct xrcd_table_entry *entry;
659 struct rb_node *p = dev->xrcd_tree.rb_node;
660
661 while (p) {
662 entry = rb_entry(p, struct xrcd_table_entry, node);
663
664 if (inode < entry->inode)
665 p = p->rb_left;
666 else if (inode > entry->inode)
667 p = p->rb_right;
668 else
669 return entry;
670 }
671
672 return NULL;
673}
674
675static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
676{
677 struct xrcd_table_entry *entry;
678
679 entry = xrcd_table_search(dev, inode);
680 if (!entry)
681 return NULL;
682
683 return entry->xrcd;
684}
685
686static void xrcd_table_delete(struct ib_uverbs_device *dev,
687 struct inode *inode)
688{
689 struct xrcd_table_entry *entry;
690
691 entry = xrcd_table_search(dev, inode);
692 if (entry) {
693 iput(inode);
694 rb_erase(&entry->node, &dev->xrcd_tree);
695 kfree(entry);
696 }
697}
698
699ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
700 const char __user *buf, int in_len,
701 int out_len)
702{
703 struct ib_uverbs_open_xrcd cmd;
704 struct ib_uverbs_open_xrcd_resp resp;
705 struct ib_udata udata;
706 struct ib_uxrcd_object *obj;
707 struct ib_xrcd *xrcd = NULL;
2903ff01 708 struct fd f = {NULL, 0};
53d0bd1e 709 struct inode *inode = NULL;
2903ff01 710 int ret = 0;
53d0bd1e
SH		 711 int new_xrcd = 0;
712
713 if (out_len < sizeof resp)
714 return -ENOSPC;
715
716 if (copy_from_user(&cmd, buf, sizeof cmd))
717 return -EFAULT;
718
719 INIT_UDATA(&udata, buf + sizeof cmd,
720 (unsigned long) cmd.response + sizeof resp,
721 in_len - sizeof cmd, out_len - sizeof resp);
722
723 mutex_lock(&file->device->xrcd_tree_mutex);
724
725 if (cmd.fd != -1) {
726 /* search for file descriptor */
2903ff01
AV		 727 f = fdget(cmd.fd);
728 if (!f.file) {
53d0bd1e
SH		 729 ret = -EBADF;
730 goto err_tree_mutex_unlock;
731 }
732
496ad9aa 733 inode = file_inode(f.file);
53d0bd1e
SH		 734 xrcd = find_xrcd(file->device, inode);
735 if (!xrcd && !(cmd.oflags & O_CREAT)) {
736 /* no file descriptor. Need CREATE flag */
737 ret = -EAGAIN;
738 goto err_tree_mutex_unlock;
739 }
740
741 if (xrcd && cmd.oflags & O_EXCL) {
742 ret = -EINVAL;
743 goto err_tree_mutex_unlock;
744 }
745 }
746
747 obj = kmalloc(sizeof *obj, GFP_KERNEL);
748 if (!obj) {
749 ret = -ENOMEM;
750 goto err_tree_mutex_unlock;
751 }
752
3bea57a5 753 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
53d0bd1e
SH		 754
755 down_write(&obj->uobject.mutex);
756
757 if (!xrcd) {
758 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
759 file->ucontext, &udata);
760 if (IS_ERR(xrcd)) {
761 ret = PTR_ERR(xrcd);
762 goto err;
763 }
764
765 xrcd->inode = inode;
766 xrcd->device = file->device->ib_dev;
767 atomic_set(&xrcd->usecnt, 0);
768 mutex_init(&xrcd->tgt_qp_mutex);
769 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
770 new_xrcd = 1;
771 }
772
773 atomic_set(&obj->refcnt, 0);
774 obj->uobject.object = xrcd;
775 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
776 if (ret)
777 goto err_idr;
778
779 memset(&resp, 0, sizeof resp);
780 resp.xrcd_handle = obj->uobject.id;
781
782 if (inode) {
783 if (new_xrcd) {
784 /* create new inode/xrcd table entry */
785 ret = xrcd_table_insert(file->device, inode, xrcd);
786 if (ret)
787 goto err_insert_xrcd;
788 }
789 atomic_inc(&xrcd->usecnt);
790 }
791
792 if (copy_to_user((void __user *) (unsigned long) cmd.response,
793 &resp, sizeof resp)) {
794 ret = -EFAULT;
795 goto err_copy;
796 }
797
2903ff01
AV		 798 if (f.file)
799 fdput(f);
53d0bd1e
SH		 800
801 mutex_lock(&file->mutex);
802 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
803 mutex_unlock(&file->mutex);
804
805 obj->uobject.live = 1;
806 up_write(&obj->uobject.mutex);
807
808 mutex_unlock(&file->device->xrcd_tree_mutex);
809 return in_len;
810
811err_copy:
812 if (inode) {
813 if (new_xrcd)
814 xrcd_table_delete(file->device, inode);
815 atomic_dec(&xrcd->usecnt);
816 }
817
818err_insert_xrcd:
819 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
820
821err_idr:
822 ib_dealloc_xrcd(xrcd);
823
824err:
825 put_uobj_write(&obj->uobject);
826
827err_tree_mutex_unlock:
2903ff01
AV		 828 if (f.file)
829 fdput(f);
53d0bd1e
SH		 830
831 mutex_unlock(&file->device->xrcd_tree_mutex);
832
833 return ret;
834}
835
836ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
837 const char __user *buf, int in_len,
838 int out_len)
839{
840 struct ib_uverbs_close_xrcd cmd;
841 struct ib_uobject *uobj;
842 struct ib_xrcd *xrcd = NULL;
843 struct inode *inode = NULL;
844 struct ib_uxrcd_object *obj;
845 int live;
846 int ret = 0;
847
848 if (copy_from_user(&cmd, buf, sizeof cmd))
849 return -EFAULT;
850
851 mutex_lock(&file->device->xrcd_tree_mutex);
852 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
853 if (!uobj) {
854 ret = -EINVAL;
855 goto out;
856 }
857
858 xrcd = uobj->object;
859 inode = xrcd->inode;
860 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
861 if (atomic_read(&obj->refcnt)) {
862 put_uobj_write(uobj);
863 ret = -EBUSY;
864 goto out;
865 }
866
867 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
868 ret = ib_dealloc_xrcd(uobj->object);
869 if (!ret)
870 uobj->live = 0;
871 }
872
873 live = uobj->live;
874 if (inode && ret)
875 atomic_inc(&xrcd->usecnt);
876
877 put_uobj_write(uobj);
878
879 if (ret)
880 goto out;
881
882 if (inode && !live)
883 xrcd_table_delete(file->device, inode);
884
885 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
886 mutex_lock(&file->mutex);
887 list_del(&uobj->list);
888 mutex_unlock(&file->mutex);
889
890 put_uobj(uobj);
891 ret = in_len;
892
893out:
894 mutex_unlock(&file->device->xrcd_tree_mutex);
895 return ret;
896}
897
898void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
899 struct ib_xrcd *xrcd)
900{
901 struct inode *inode;
902
903 inode = xrcd->inode;
904 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
905 return;
906
907 ib_dealloc_xrcd(xrcd);
908
909 if (inode)
910 xrcd_table_delete(dev, inode);
911}
912
bc38a6ab
RD		 913ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
914 const char __user *buf, int in_len,
915 int out_len)
916{
917 struct ib_uverbs_reg_mr cmd;
918 struct ib_uverbs_reg_mr_resp resp;
919 struct ib_udata udata;
f7c6a7b5 920 struct ib_uobject *uobj;
bc38a6ab
RD		 921 struct ib_pd *pd;
922 struct ib_mr *mr;
923 int ret;
924
925 if (out_len < sizeof resp)
926 return -ENOSPC;
927
928 if (copy_from_user(&cmd, buf, sizeof cmd))
929 return -EFAULT;
930
931 INIT_UDATA(&udata, buf + sizeof cmd,
932 (unsigned long) cmd.response + sizeof resp,
933 in_len - sizeof cmd, out_len - sizeof resp);
934
935 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
936 return -EINVAL;
937
f575394f
RD		 938 /*
939 * Local write permission is required if remote write or
940 * remote atomic permission is also requested.
941 */
942 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
943 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
944 return -EINVAL;
945
f7c6a7b5
RD		 946 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
947 if (!uobj)
bc38a6ab
RD		 948 return -ENOMEM;
949
3bea57a5 950 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
f7c6a7b5 951 down_write(&uobj->mutex);
bc38a6ab 952
9ead190b 953 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
aaf1aef5
RD		 954 if (!pd) {
955 ret = -EINVAL;
f7c6a7b5 956 goto err_free;
aaf1aef5 957 }
bc38a6ab 958
f7c6a7b5
RD		 959 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
960 cmd.access_flags, &udata);
bc38a6ab
RD		 961 if (IS_ERR(mr)) {
962 ret = PTR_ERR(mr);
9ead190b 963 goto err_put;
bc38a6ab
RD		 964 }
965
966 mr->device = pd->device;
967 mr->pd = pd;
f7c6a7b5 968 mr->uobject = uobj;
bc38a6ab
RD		 969 atomic_inc(&pd->usecnt);
970 atomic_set(&mr->usecnt, 0);
971
f7c6a7b5
RD		 972 uobj->object = mr;
973 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
bc38a6ab
RD		 974 if (ret)
975 goto err_unreg;
976
9ead190b
RD		 977 memset(&resp, 0, sizeof resp);
978 resp.lkey = mr->lkey;
979 resp.rkey = mr->rkey;
f7c6a7b5 980 resp.mr_handle = uobj->id;
bc38a6ab 981
bc38a6ab
RD		 982 if (copy_to_user((void __user *) (unsigned long) cmd.response,
983 &resp, sizeof resp)) {
984 ret = -EFAULT;
9ead190b 985 goto err_copy;
bc38a6ab
RD		 986 }
987
9ead190b
RD		 988 put_pd_read(pd);
989
95ed644f 990 mutex_lock(&file->mutex);
f7c6a7b5 991 list_add_tail(&uobj->list, &file->ucontext->mr_list);
95ed644f 992 mutex_unlock(&file->mutex);
eb9d3cd5 993
f7c6a7b5 994 uobj->live = 1;
9ead190b 995
f7c6a7b5 996 up_write(&uobj->mutex);
bc38a6ab
RD		 997
998 return in_len;
999
9ead190b 1000err_copy:
f7c6a7b5 1001 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
bc38a6ab
RD		 1002
1003err_unreg:
1004 ib_dereg_mr(mr);
1005
9ead190b
RD		 1006err_put:
1007 put_pd_read(pd);
bc38a6ab 1008
bc38a6ab 1009err_free:
f7c6a7b5 1010 put_uobj_write(uobj);
bc38a6ab
RD		 1011 return ret;
1012}
1013
1014ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1015 const char __user *buf, int in_len,
1016 int out_len)
1017{
1018 struct ib_uverbs_dereg_mr cmd;
1019 struct ib_mr *mr;
9ead190b 1020 struct ib_uobject *uobj;
bc38a6ab
RD		 1021 int ret = -EINVAL;
1022
1023 if (copy_from_user(&cmd, buf, sizeof cmd))
1024 return -EFAULT;
1025
9ead190b
RD		 1026 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1027 if (!uobj)
1028 return -EINVAL;
bc38a6ab 1029
f7c6a7b5 1030 mr = uobj->object;
bc38a6ab
RD		 1031
1032 ret = ib_dereg_mr(mr);
9ead190b
RD		 1033 if (!ret)
1034 uobj->live = 0;
1035
1036 put_uobj_write(uobj);
1037
bc38a6ab 1038 if (ret)
9ead190b 1039 return ret;
bc38a6ab 1040
9ead190b 1041 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
bc38a6ab 1042
95ed644f 1043 mutex_lock(&file->mutex);
9ead190b 1044 list_del(&uobj->list);
95ed644f 1045 mutex_unlock(&file->mutex);
bc38a6ab 1046
9ead190b 1047 put_uobj(uobj);
bc38a6ab 1048
9ead190b 1049 return in_len;
bc38a6ab
RD		 1050}
1051
6b73597e
RD		 1052ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1053 const char __user *buf, int in_len,
1054 int out_len)
1055{
1056 struct ib_uverbs_create_comp_channel cmd;
1057 struct ib_uverbs_create_comp_channel_resp resp;
1058 struct file *filp;
b1e4594b 1059 int ret;
6b73597e
RD		 1060
1061 if (out_len < sizeof resp)
1062 return -ENOSPC;
1063
1064 if (copy_from_user(&cmd, buf, sizeof cmd))
1065 return -EFAULT;
1066
b1e4594b
AV		 1067 ret = get_unused_fd();
1068 if (ret < 0)
1069 return ret;
1070 resp.fd = ret;
1071
1072 filp = ib_uverbs_alloc_event_file(file, 0);
1073 if (IS_ERR(filp)) {
1074 put_unused_fd(resp.fd);
6b73597e 1075 return PTR_ERR(filp);
b1e4594b 1076 }
6b73597e
RD		 1077
1078 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1079 &resp, sizeof resp)) {
1080 put_unused_fd(resp.fd);
1081 fput(filp);
1082 return -EFAULT;
1083 }
1084
1085 fd_install(resp.fd, filp);
1086 return in_len;
1087}
1088
bc38a6ab
RD		 1089ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1090 const char __user *buf, int in_len,
1091 int out_len)
1092{
1093 struct ib_uverbs_create_cq cmd;
1094 struct ib_uverbs_create_cq_resp resp;
1095 struct ib_udata udata;
9ead190b 1096 struct ib_ucq_object *obj;
6b73597e 1097 struct ib_uverbs_event_file *ev_file = NULL;
bc38a6ab
RD		 1098 struct ib_cq *cq;
1099 int ret;
1100
1101 if (out_len < sizeof resp)
1102 return -ENOSPC;
1103
1104 if (copy_from_user(&cmd, buf, sizeof cmd))
1105 return -EFAULT;
1106
1107 INIT_UDATA(&udata, buf + sizeof cmd,
1108 (unsigned long) cmd.response + sizeof resp,
1109 in_len - sizeof cmd, out_len - sizeof resp);
1110
6b73597e 1111 if (cmd.comp_vector >= file->device->num_comp_vectors)
bc38a6ab
RD		 1112 return -EINVAL;
1113
9ead190b
RD		 1114 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1115 if (!obj)
bc38a6ab
RD		 1116 return -ENOMEM;
1117
3bea57a5 1118 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class);
9ead190b
RD		 1119 down_write(&obj->uobject.mutex);
1120
ac4e7b35
JM		 1121 if (cmd.comp_channel >= 0) {
1122 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
1123 if (!ev_file) {
1124 ret = -EINVAL;
1125 goto err;
1126 }
1127 }
1128
9ead190b
RD		 1129 obj->uverbs_file = file;
1130 obj->comp_events_reported = 0;
1131 obj->async_events_reported = 0;
1132 INIT_LIST_HEAD(&obj->comp_list);
1133 INIT_LIST_HEAD(&obj->async_list);
bc38a6ab
RD		 1134
1135 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
f4fd0b22 1136 cmd.comp_vector,
bc38a6ab
RD		 1137 file->ucontext, &udata);
1138 if (IS_ERR(cq)) {
1139 ret = PTR_ERR(cq);
9ead190b 1140 goto err_file;
bc38a6ab
RD		 1141 }
1142
1143 cq->device = file->device->ib_dev;
9ead190b 1144 cq->uobject = &obj->uobject;
bc38a6ab
RD		 1145 cq->comp_handler = ib_uverbs_comp_handler;
1146 cq->event_handler = ib_uverbs_cq_event_handler;
6b73597e 1147 cq->cq_context = ev_file;
bc38a6ab
RD		 1148 atomic_set(&cq->usecnt, 0);
1149
9ead190b
RD		 1150 obj->uobject.object = cq;
1151 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
bc38a6ab 1152 if (ret)
9ead190b 1153 goto err_free;
bc38a6ab
RD		 1154
1155 memset(&resp, 0, sizeof resp);
9ead190b 1156 resp.cq_handle = obj->uobject.id;
bc38a6ab
RD		 1157 resp.cqe = cq->cqe;
1158
1159 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1160 &resp, sizeof resp)) {
1161 ret = -EFAULT;
9ead190b 1162 goto err_copy;
bc38a6ab
RD		 1163 }
1164
95ed644f 1165 mutex_lock(&file->mutex);
9ead190b 1166 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
95ed644f 1167 mutex_unlock(&file->mutex);
bc38a6ab 1168
9ead190b
RD		 1169 obj->uobject.live = 1;
1170
1171 up_write(&obj->uobject.mutex);
bc38a6ab 1172
eb9d3cd5
RD		 1173 return in_len;
1174
9ead190b
RD		 1175err_copy:
1176 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
eb9d3cd5 1177
9ead190b 1178err_free:
bc38a6ab
RD		 1179 ib_destroy_cq(cq);
1180
9ead190b 1181err_file:
ac4e7b35 1182 if (ev_file)
9ead190b
RD		 1183 ib_uverbs_release_ucq(file, ev_file, obj);
1184
1185err:
1186 put_uobj_write(&obj->uobject);
bc38a6ab
RD		 1187 return ret;
1188}
1189
33b9b3ee
RD		 1190ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1191 const char __user *buf, int in_len,
1192 int out_len)
1193{
1194 struct ib_uverbs_resize_cq cmd;
1195 struct ib_uverbs_resize_cq_resp resp;
1196 struct ib_udata udata;
1197 struct ib_cq *cq;
1198 int ret = -EINVAL;
1199
1200 if (copy_from_user(&cmd, buf, sizeof cmd))
1201 return -EFAULT;
1202
1203 INIT_UDATA(&udata, buf + sizeof cmd,
1204 (unsigned long) cmd.response + sizeof resp,
1205 in_len - sizeof cmd, out_len - sizeof resp);
1206
1ccf6aa1 1207 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
9ead190b
RD		 1208 if (!cq)
1209 return -EINVAL;
33b9b3ee
RD		 1210
1211 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1212 if (ret)
1213 goto out;
1214
33b9b3ee
RD		 1215 resp.cqe = cq->cqe;
1216
1217 if (copy_to_user((void __user *) (unsigned long) cmd.response,
64f817ba 1218 &resp, sizeof resp.cqe))
33b9b3ee
RD		 1219 ret = -EFAULT;
1220
1221out:
9ead190b 1222 put_cq_read(cq);
33b9b3ee
RD		 1223
1224 return ret ? ret : in_len;
1225}
1226
7182afea
DC		 1227static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1228{
1229 struct ib_uverbs_wc tmp;
1230
1231 tmp.wr_id = wc->wr_id;
1232 tmp.status = wc->status;
1233 tmp.opcode = wc->opcode;
1234 tmp.vendor_err = wc->vendor_err;
1235 tmp.byte_len = wc->byte_len;
1236 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1237 tmp.qp_num = wc->qp->qp_num;
1238 tmp.src_qp = wc->src_qp;
1239 tmp.wc_flags = wc->wc_flags;
1240 tmp.pkey_index = wc->pkey_index;
1241 tmp.slid = wc->slid;
1242 tmp.sl = wc->sl;
1243 tmp.dlid_path_bits = wc->dlid_path_bits;
1244 tmp.port_num = wc->port_num;
1245 tmp.reserved = 0;
1246
1247 if (copy_to_user(dest, &tmp, sizeof tmp))
1248 return -EFAULT;
1249
1250 return 0;
1251}
1252
67cdb40c
RD		 1253ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1254 const char __user *buf, int in_len,
1255 int out_len)
1256{
1257 struct ib_uverbs_poll_cq cmd;
7182afea
DC		 1258 struct ib_uverbs_poll_cq_resp resp;
1259 u8 __user *header_ptr;
1260 u8 __user *data_ptr;
67cdb40c 1261 struct ib_cq *cq;
7182afea
DC		 1262 struct ib_wc wc;
1263 int ret;
67cdb40c
RD		 1264
1265 if (copy_from_user(&cmd, buf, sizeof cmd))
1266 return -EFAULT;
1267
1ccf6aa1 1268 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
7182afea
DC		 1269 if (!cq)
1270 return -EINVAL;
67cdb40c 1271
7182afea
DC		 1272 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1273 header_ptr = (void __user *)(unsigned long) cmd.response;
1274 data_ptr = header_ptr + sizeof resp;
9ead190b 1275
7182afea
DC		 1276 memset(&resp, 0, sizeof resp);
1277 while (resp.count < cmd.ne) {
1278 ret = ib_poll_cq(cq, 1, &wc);
1279 if (ret < 0)
1280 goto out_put;
1281 if (!ret)
1282 break;
1283
1284 ret = copy_wc_to_user(data_ptr, &wc);
1285 if (ret)
1286 goto out_put;
1287
1288 data_ptr += sizeof(struct ib_uverbs_wc);
1289 ++resp.count;
67cdb40c
RD		 1290 }
1291
7182afea 1292 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
67cdb40c 1293 ret = -EFAULT;
7182afea
DC		 1294 goto out_put;
1295 }
67cdb40c 1296
7182afea 1297 ret = in_len;
67cdb40c 1298
7182afea
DC		 1299out_put:
1300 put_cq_read(cq);
1301 return ret;
67cdb40c
RD		 1302}
1303
1304ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1305 const char __user *buf, int in_len,
1306 int out_len)
1307{
1308 struct ib_uverbs_req_notify_cq cmd;
1309 struct ib_cq *cq;
67cdb40c
RD		 1310
1311 if (copy_from_user(&cmd, buf, sizeof cmd))
1312 return -EFAULT;
1313
1ccf6aa1 1314 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
ab108676 1315 if (!cq)
9ead190b 1316 return -EINVAL;
67cdb40c 1317
9ead190b
RD		 1318 ib_req_notify_cq(cq, cmd.solicited_only ?
1319 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1320
ab108676 1321 put_cq_read(cq);
9ead190b
RD		 1322
1323 return in_len;
67cdb40c
RD		 1324}
1325
bc38a6ab
RD		 1326ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1327 const char __user *buf, int in_len,
1328 int out_len)
1329{
63aaf647
RD		 1330 struct ib_uverbs_destroy_cq cmd;
1331 struct ib_uverbs_destroy_cq_resp resp;
9ead190b 1332 struct ib_uobject *uobj;
63aaf647 1333 struct ib_cq *cq;
9ead190b 1334 struct ib_ucq_object *obj;
6b73597e 1335 struct ib_uverbs_event_file *ev_file;
63aaf647 1336 int ret = -EINVAL;
bc38a6ab
RD		 1337
1338 if (copy_from_user(&cmd, buf, sizeof cmd))
1339 return -EFAULT;
1340
9ead190b
RD		 1341 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1342 if (!uobj)
1343 return -EINVAL;
1344 cq = uobj->object;
1345 ev_file = cq->cq_context;
1346 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
bc38a6ab 1347
9ead190b
RD		 1348 ret = ib_destroy_cq(cq);
1349 if (!ret)
1350 uobj->live = 0;
bc38a6ab 1351
9ead190b 1352 put_uobj_write(uobj);
bc38a6ab 1353
bc38a6ab 1354 if (ret)
9ead190b 1355 return ret;
bc38a6ab 1356
9ead190b 1357 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
bc38a6ab 1358
95ed644f 1359 mutex_lock(&file->mutex);
9ead190b 1360 list_del(&uobj->list);
95ed644f 1361 mutex_unlock(&file->mutex);
bc38a6ab 1362
9ead190b 1363 ib_uverbs_release_ucq(file, ev_file, obj);
63aaf647 1364
9ead190b
RD		 1365 memset(&resp, 0, sizeof resp);
1366 resp.comp_events_reported = obj->comp_events_reported;
1367 resp.async_events_reported = obj->async_events_reported;
63aaf647 1368
9ead190b 1369 put_uobj(uobj);
bc38a6ab 1370
63aaf647
RD		 1371 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1372 &resp, sizeof resp))
9ead190b 1373 return -EFAULT;
bc38a6ab 1374
9ead190b 1375 return in_len;
bc38a6ab
RD		 1376}
1377
1378ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1379 const char __user *buf, int in_len,
1380 int out_len)
1381{
1382 struct ib_uverbs_create_qp cmd;
1383 struct ib_uverbs_create_qp_resp resp;
1384 struct ib_udata udata;
9ead190b 1385 struct ib_uqp_object *obj;
b93f3c18
SH		 1386 struct ib_device *device;
1387 struct ib_pd *pd = NULL;
1388 struct ib_xrcd *xrcd = NULL;
1389 struct ib_uobject *uninitialized_var(xrcd_uobj);
1390 struct ib_cq *scq = NULL, *rcq = NULL;
9977f4f6 1391 struct ib_srq *srq = NULL;
bc38a6ab
RD		 1392 struct ib_qp *qp;
1393 struct ib_qp_init_attr attr;
1394 int ret;
1395
1396 if (out_len < sizeof resp)
1397 return -ENOSPC;
1398
1399 if (copy_from_user(&cmd, buf, sizeof cmd))
1400 return -EFAULT;
1401
c938a616
OG		 1402 if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1403 return -EPERM;
1404
bc38a6ab
RD		 1405 INIT_UDATA(&udata, buf + sizeof cmd,
1406 (unsigned long) cmd.response + sizeof resp,
1407 in_len - sizeof cmd, out_len - sizeof resp);
1408
9ead190b
RD		 1409 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1410 if (!obj)
bc38a6ab
RD		 1411 return -ENOMEM;
1412
3bea57a5 1413 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
9ead190b 1414 down_write(&obj->uevent.uobject.mutex);
bc38a6ab 1415
b93f3c18
SH		 1416 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1417 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1418 if (!xrcd) {
1419 ret = -EINVAL;
1420 goto err_put;
1421 }
1422 device = xrcd->device;
9977f4f6 1423 } else {
b93f3c18
SH		 1424 if (cmd.qp_type == IB_QPT_XRC_INI) {
1425 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1426 } else {
1427 if (cmd.is_srq) {
1428 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1429 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1430 ret = -EINVAL;
1431 goto err_put;
1432 }
1433 }
5909ce54
RD		 1434
1435 if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1436 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1437 if (!rcq) {
1438 ret = -EINVAL;
1439 goto err_put;
1440 }
9977f4f6
SH		 1441 }
1442 }
5909ce54
RD		 1443
1444 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1445 rcq = rcq ?: scq;
1446 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1447 if (!pd || !scq) {
1448 ret = -EINVAL;
1449 goto err_put;
1450 }
1451
b93f3c18 1452 device = pd->device;
9977f4f6
SH		 1453 }
1454
bc38a6ab
RD		 1455 attr.event_handler = ib_uverbs_qp_event_handler;
1456 attr.qp_context = file;
1457 attr.send_cq = scq;
1458 attr.recv_cq = rcq;
f520ba5a 1459 attr.srq = srq;
b93f3c18 1460 attr.xrcd = xrcd;
bc38a6ab
RD		 1461 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1462 attr.qp_type = cmd.qp_type;
b846f25a 1463 attr.create_flags = 0;
bc38a6ab
RD		 1464
1465 attr.cap.max_send_wr = cmd.max_send_wr;
1466 attr.cap.max_recv_wr = cmd.max_recv_wr;
1467 attr.cap.max_send_sge = cmd.max_send_sge;
1468 attr.cap.max_recv_sge = cmd.max_recv_sge;
1469 attr.cap.max_inline_data = cmd.max_inline_data;
1470
9ead190b
RD		 1471 obj->uevent.events_reported = 0;
1472 INIT_LIST_HEAD(&obj->uevent.event_list);
1473 INIT_LIST_HEAD(&obj->mcast_list);
bc38a6ab 1474
b93f3c18
SH		 1475 if (cmd.qp_type == IB_QPT_XRC_TGT)
1476 qp = ib_create_qp(pd, &attr);
1477 else
1478 qp = device->create_qp(pd, &attr, &udata);
1479
bc38a6ab
RD		 1480 if (IS_ERR(qp)) {
1481 ret = PTR_ERR(qp);
9ead190b 1482 goto err_put;
bc38a6ab
RD		 1483 }
1484
b93f3c18 1485 if (cmd.qp_type != IB_QPT_XRC_TGT) {
0e0ec7e0 1486 qp->real_qp = qp;
b93f3c18
SH		 1487 qp->device = device;
1488 qp->pd = pd;
1489 qp->send_cq = attr.send_cq;
1490 qp->recv_cq = attr.recv_cq;
1491 qp->srq = attr.srq;
1492 qp->event_handler = attr.event_handler;
1493 qp->qp_context = attr.qp_context;
1494 qp->qp_type = attr.qp_type;
e47e321a 1495 atomic_set(&qp->usecnt, 0);
b93f3c18
SH		 1496 atomic_inc(&pd->usecnt);
1497 atomic_inc(&attr.send_cq->usecnt);
1498 if (attr.recv_cq)
1499 atomic_inc(&attr.recv_cq->usecnt);
1500 if (attr.srq)
1501 atomic_inc(&attr.srq->usecnt);
1502 }
1503 qp->uobject = &obj->uevent.uobject;
bc38a6ab 1504
9ead190b
RD		 1505 obj->uevent.uobject.object = qp;
1506 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
bc38a6ab
RD		 1507 if (ret)
1508 goto err_destroy;
1509
9ead190b
RD		 1510 memset(&resp, 0, sizeof resp);
1511 resp.qpn = qp->qp_num;
1512 resp.qp_handle = obj->uevent.uobject.id;
77369ed3
JM		 1513 resp.max_recv_sge = attr.cap.max_recv_sge;
1514 resp.max_send_sge = attr.cap.max_send_sge;
1515 resp.max_recv_wr = attr.cap.max_recv_wr;
1516 resp.max_send_wr = attr.cap.max_send_wr;
1517 resp.max_inline_data = attr.cap.max_inline_data;
bc38a6ab 1518
bc38a6ab
RD		 1519 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1520 &resp, sizeof resp)) {
1521 ret = -EFAULT;
9ead190b 1522 goto err_copy;
bc38a6ab
RD		 1523 }
1524
b93f3c18
SH		 1525 if (xrcd)
1526 put_xrcd_read(xrcd_uobj);
1527 if (pd)
1528 put_pd_read(pd);
1529 if (scq)
1530 put_cq_read(scq);
9977f4f6 1531 if (rcq && rcq != scq)
43db2bc0 1532 put_cq_read(rcq);
9ead190b
RD		 1533 if (srq)
1534 put_srq_read(srq);
1535
95ed644f 1536 mutex_lock(&file->mutex);
9ead190b 1537 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
95ed644f 1538 mutex_unlock(&file->mutex);
eb9d3cd5 1539
9ead190b
RD		 1540 obj->uevent.uobject.live = 1;
1541
1542 up_write(&obj->uevent.uobject.mutex);
bc38a6ab
RD		 1543
1544 return in_len;
1545
9ead190b
RD		 1546err_copy:
1547 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
bc38a6ab
RD		 1548
1549err_destroy:
1550 ib_destroy_qp(qp);
1551
9ead190b 1552err_put:
b93f3c18
SH		 1553 if (xrcd)
1554 put_xrcd_read(xrcd_uobj);
9ead190b
RD		 1555 if (pd)
1556 put_pd_read(pd);
1557 if (scq)
1558 put_cq_read(scq);
43db2bc0 1559 if (rcq && rcq != scq)
9ead190b
RD		 1560 put_cq_read(rcq);
1561 if (srq)
1562 put_srq_read(srq);
1563
1564 put_uobj_write(&obj->uevent.uobject);
bc38a6ab
RD		 1565 return ret;
1566}
1567
42849b26
SH		 1568ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1569 const char __user *buf, int in_len, int out_len)
1570{
1571 struct ib_uverbs_open_qp cmd;
1572 struct ib_uverbs_create_qp_resp resp;
1573 struct ib_udata udata;
1574 struct ib_uqp_object *obj;
1575 struct ib_xrcd *xrcd;
1576 struct ib_uobject *uninitialized_var(xrcd_uobj);
1577 struct ib_qp *qp;
1578 struct ib_qp_open_attr attr;
1579 int ret;
1580
1581 if (out_len < sizeof resp)
1582 return -ENOSPC;
1583
1584 if (copy_from_user(&cmd, buf, sizeof cmd))
1585 return -EFAULT;
1586
1587 INIT_UDATA(&udata, buf + sizeof cmd,
1588 (unsigned long) cmd.response + sizeof resp,
1589 in_len - sizeof cmd, out_len - sizeof resp);
1590
1591 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1592 if (!obj)
1593 return -ENOMEM;
1594
3bea57a5 1595 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
42849b26
SH		 1596 down_write(&obj->uevent.uobject.mutex);
1597
1598 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1599 if (!xrcd) {
1600 ret = -EINVAL;
1601 goto err_put;
1602 }
1603
1604 attr.event_handler = ib_uverbs_qp_event_handler;
1605 attr.qp_context = file;
1606 attr.qp_num = cmd.qpn;
1607 attr.qp_type = cmd.qp_type;
1608
1609 obj->uevent.events_reported = 0;
1610 INIT_LIST_HEAD(&obj->uevent.event_list);
1611 INIT_LIST_HEAD(&obj->mcast_list);
1612
1613 qp = ib_open_qp(xrcd, &attr);
1614 if (IS_ERR(qp)) {
1615 ret = PTR_ERR(qp);
1616 goto err_put;
1617 }
1618
1619 qp->uobject = &obj->uevent.uobject;
1620
1621 obj->uevent.uobject.object = qp;
1622 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1623 if (ret)
1624 goto err_destroy;
1625
1626 memset(&resp, 0, sizeof resp);
1627 resp.qpn = qp->qp_num;
1628 resp.qp_handle = obj->uevent.uobject.id;
1629
1630 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1631 &resp, sizeof resp)) {
1632 ret = -EFAULT;
1633 goto err_remove;
1634 }
1635
1636 put_xrcd_read(xrcd_uobj);
1637
1638 mutex_lock(&file->mutex);
1639 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1640 mutex_unlock(&file->mutex);
1641
1642 obj->uevent.uobject.live = 1;
1643
1644 up_write(&obj->uevent.uobject.mutex);
1645
1646 return in_len;
1647
1648err_remove:
1649 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1650
1651err_destroy:
1652 ib_destroy_qp(qp);
1653
1654err_put:
1655 put_xrcd_read(xrcd_uobj);
1656 put_uobj_write(&obj->uevent.uobject);
1657 return ret;
1658}
1659
7ccc9a24
DB		 1660ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1661 const char __user *buf, int in_len,
1662 int out_len)
1663{
1664 struct ib_uverbs_query_qp cmd;
1665 struct ib_uverbs_query_qp_resp resp;
1666 struct ib_qp *qp;
1667 struct ib_qp_attr *attr;
1668 struct ib_qp_init_attr *init_attr;
1669 int ret;
1670
1671 if (copy_from_user(&cmd, buf, sizeof cmd))
1672 return -EFAULT;
1673
1674 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1675 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1676 if (!attr || !init_attr) {
1677 ret = -ENOMEM;
1678 goto out;
1679 }
1680
9ead190b
RD		 1681 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1682 if (!qp) {
7ccc9a24 1683 ret = -EINVAL;
9ead190b
RD		 1684 goto out;
1685 }
1686
1687 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
7ccc9a24 1688
9ead190b 1689 put_qp_read(qp);
7ccc9a24
DB		 1690
1691 if (ret)
1692 goto out;
1693
1694 memset(&resp, 0, sizeof resp);
1695
1696 resp.qp_state = attr->qp_state;
1697 resp.cur_qp_state = attr->cur_qp_state;
1698 resp.path_mtu = attr->path_mtu;
1699 resp.path_mig_state = attr->path_mig_state;
1700 resp.qkey = attr->qkey;
1701 resp.rq_psn = attr->rq_psn;
1702 resp.sq_psn = attr->sq_psn;
1703 resp.dest_qp_num = attr->dest_qp_num;
1704 resp.qp_access_flags = attr->qp_access_flags;
1705 resp.pkey_index = attr->pkey_index;
1706 resp.alt_pkey_index = attr->alt_pkey_index;
0b26c88f 1707 resp.sq_draining = attr->sq_draining;
7ccc9a24
DB		 1708 resp.max_rd_atomic = attr->max_rd_atomic;
1709 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1710 resp.min_rnr_timer = attr->min_rnr_timer;
1711 resp.port_num = attr->port_num;
1712 resp.timeout = attr->timeout;
1713 resp.retry_cnt = attr->retry_cnt;
1714 resp.rnr_retry = attr->rnr_retry;
1715 resp.alt_port_num = attr->alt_port_num;
1716 resp.alt_timeout = attr->alt_timeout;
1717
1718 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1719 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1720 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1721 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1722 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1723 resp.dest.dlid = attr->ah_attr.dlid;
1724 resp.dest.sl = attr->ah_attr.sl;
1725 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1726 resp.dest.static_rate = attr->ah_attr.static_rate;
1727 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1728 resp.dest.port_num = attr->ah_attr.port_num;
1729
1730 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1731 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1732 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1733 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1734 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1735 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1736 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1737 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1738 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1739 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1740 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1741
1742 resp.max_send_wr = init_attr->cap.max_send_wr;
1743 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1744 resp.max_send_sge = init_attr->cap.max_send_sge;
1745 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1746 resp.max_inline_data = init_attr->cap.max_inline_data;
27d56300 1747 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
7ccc9a24
DB		 1748
1749 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1750 &resp, sizeof resp))
1751 ret = -EFAULT;
1752
1753out:
1754 kfree(attr);
1755 kfree(init_attr);
1756
1757 return ret ? ret : in_len;
1758}
1759
9977f4f6
SH		 1760/* Remove ignored fields set in the attribute mask */
1761static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1762{
1763 switch (qp_type) {
1764 case IB_QPT_XRC_INI:
1765 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
b93f3c18
SH		 1766 case IB_QPT_XRC_TGT:
1767 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1768 IB_QP_RNR_RETRY);
9977f4f6
SH		 1769 default:
1770 return mask;
1771 }
1772}
1773
bc38a6ab
RD		 1774ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1775 const char __user *buf, int in_len,
1776 int out_len)
1777{
1778 struct ib_uverbs_modify_qp cmd;
9bc57e2d 1779 struct ib_udata udata;
bc38a6ab
RD		 1780 struct ib_qp *qp;
1781 struct ib_qp_attr *attr;
1782 int ret;
1783
1784 if (copy_from_user(&cmd, buf, sizeof cmd))
1785 return -EFAULT;
1786
9bc57e2d
RC		 1787 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1788 out_len);
1789
bc38a6ab
RD		 1790 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1791 if (!attr)
1792 return -ENOMEM;
1793
9ead190b
RD		 1794 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1795 if (!qp) {
bc38a6ab
RD		 1796 ret = -EINVAL;
1797 goto out;
1798 }
1799
1800 attr->qp_state = cmd.qp_state;
1801 attr->cur_qp_state = cmd.cur_qp_state;
1802 attr->path_mtu = cmd.path_mtu;
1803 attr->path_mig_state = cmd.path_mig_state;
1804 attr->qkey = cmd.qkey;
1805 attr->rq_psn = cmd.rq_psn;
1806 attr->sq_psn = cmd.sq_psn;
1807 attr->dest_qp_num = cmd.dest_qp_num;
1808 attr->qp_access_flags = cmd.qp_access_flags;
1809 attr->pkey_index = cmd.pkey_index;
702b2aac 1810 attr->alt_pkey_index = cmd.alt_pkey_index;
bc38a6ab
RD		 1811 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1812 attr->max_rd_atomic = cmd.max_rd_atomic;
1813 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1814 attr->min_rnr_timer = cmd.min_rnr_timer;
1815 attr->port_num = cmd.port_num;
1816 attr->timeout = cmd.timeout;
1817 attr->retry_cnt = cmd.retry_cnt;
1818 attr->rnr_retry = cmd.rnr_retry;
1819 attr->alt_port_num = cmd.alt_port_num;
1820 attr->alt_timeout = cmd.alt_timeout;
1821
1822 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1823 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1824 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1825 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1826 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1827 attr->ah_attr.dlid = cmd.dest.dlid;
1828 attr->ah_attr.sl = cmd.dest.sl;
1829 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1830 attr->ah_attr.static_rate = cmd.dest.static_rate;
1831 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1832 attr->ah_attr.port_num = cmd.dest.port_num;
1833
1834 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1835 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1836 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1837 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1838 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1839 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1840 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1841 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1842 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1843 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1844 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1845
0e0ec7e0
SH		 1846 if (qp->real_qp == qp) {
1847 ret = qp->device->modify_qp(qp, attr,
1848 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
1849 } else {
1850 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
1851 }
9ead190b
RD		 1852
1853 put_qp_read(qp);
1854
bc38a6ab
RD		 1855 if (ret)
1856 goto out;
1857
1858 ret = in_len;
1859
1860out:
bc38a6ab
RD		 1861 kfree(attr);
1862
1863 return ret;
1864}
1865
1866ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1867 const char __user *buf, int in_len,
1868 int out_len)
1869{
63aaf647
RD		 1870 struct ib_uverbs_destroy_qp cmd;
1871 struct ib_uverbs_destroy_qp_resp resp;
9ead190b 1872 struct ib_uobject *uobj;
63aaf647 1873 struct ib_qp *qp;
9ead190b 1874 struct ib_uqp_object *obj;
63aaf647 1875 int ret = -EINVAL;
bc38a6ab
RD		 1876
1877 if (copy_from_user(&cmd, buf, sizeof cmd))
1878 return -EFAULT;
1879
63aaf647
RD		 1880 memset(&resp, 0, sizeof resp);
1881
9ead190b
RD		 1882 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1883 if (!uobj)
1884 return -EINVAL;
1885 qp = uobj->object;
1886 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
f4e40156 1887
9ead190b
RD		 1888 if (!list_empty(&obj->mcast_list)) {
1889 put_uobj_write(uobj);
1890 return -EBUSY;
f4e40156 1891 }
bc38a6ab
RD		 1892
1893 ret = ib_destroy_qp(qp);
9ead190b
RD		 1894 if (!ret)
1895 uobj->live = 0;
1896
1897 put_uobj_write(uobj);
1898
bc38a6ab 1899 if (ret)
9ead190b 1900 return ret;
bc38a6ab 1901
9ead190b 1902 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
bc38a6ab 1903
95ed644f 1904 mutex_lock(&file->mutex);
9ead190b 1905 list_del(&uobj->list);
95ed644f 1906 mutex_unlock(&file->mutex);
bc38a6ab 1907
9ead190b 1908 ib_uverbs_release_uevent(file, &obj->uevent);
63aaf647 1909
9ead190b 1910 resp.events_reported = obj->uevent.events_reported;
63aaf647 1911
9ead190b 1912 put_uobj(uobj);
bc38a6ab 1913
63aaf647
RD		 1914 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1915 &resp, sizeof resp))
9ead190b 1916 return -EFAULT;
bc38a6ab 1917
9ead190b 1918 return in_len;
bc38a6ab
RD		 1919}
1920
67cdb40c 1921ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
a74cd4af
RD		 1922 const char __user *buf, int in_len,
1923 int out_len)
67cdb40c
RD		 1924{
1925 struct ib_uverbs_post_send cmd;
1926 struct ib_uverbs_post_send_resp resp;
1927 struct ib_uverbs_send_wr *user_wr;
1928 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1929 struct ib_qp *qp;
1930 int i, sg_ind;
9ead190b 1931 int is_ud;
67cdb40c
RD		 1932 ssize_t ret = -EINVAL;
1933
1934 if (copy_from_user(&cmd, buf, sizeof cmd))
1935 return -EFAULT;
1936
1937 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1938 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1939 return -EINVAL;
1940
1941 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1942 return -EINVAL;
1943
1944 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1945 if (!user_wr)
1946 return -ENOMEM;
1947
9ead190b
RD		 1948 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1949 if (!qp)
67cdb40c
RD		 1950 goto out;
1951
9ead190b 1952 is_ud = qp->qp_type == IB_QPT_UD;
67cdb40c
RD		 1953 sg_ind = 0;
1954 last = NULL;
1955 for (i = 0; i < cmd.wr_count; ++i) {
1956 if (copy_from_user(user_wr,
1957 buf + sizeof cmd + i * cmd.wqe_size,
1958 cmd.wqe_size)) {
1959 ret = -EFAULT;
9ead190b 1960 goto out_put;
67cdb40c
RD		 1961 }
1962
1963 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1964 ret = -EINVAL;
9ead190b 1965 goto out_put;
67cdb40c
RD		 1966 }
1967
1968 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1969 user_wr->num_sge * sizeof (struct ib_sge),
1970 GFP_KERNEL);
1971 if (!next) {
1972 ret = -ENOMEM;
9ead190b 1973 goto out_put;
67cdb40c
RD		 1974 }
1975
1976 if (!last)
1977 wr = next;
1978 else
1979 last->next = next;
1980 last = next;
1981
1982 next->next = NULL;
1983 next->wr_id = user_wr->wr_id;
1984 next->num_sge = user_wr->num_sge;
1985 next->opcode = user_wr->opcode;
1986 next->send_flags = user_wr->send_flags;
67cdb40c 1987
9ead190b
RD		 1988 if (is_ud) {
1989 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1990 file->ucontext);
67cdb40c
RD		 1991 if (!next->wr.ud.ah) {
1992 ret = -EINVAL;
9ead190b 1993 goto out_put;
67cdb40c
RD		 1994 }
1995 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1996 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1997 } else {
1998 switch (next->opcode) {
67cdb40c 1999 case IB_WR_RDMA_WRITE_WITH_IMM:
0f39cf3d
RD		 2000 next->ex.imm_data =
2001 (__be32 __force) user_wr->ex.imm_data;
2002 case IB_WR_RDMA_WRITE:
67cdb40c
RD		 2003 case IB_WR_RDMA_READ:
2004 next->wr.rdma.remote_addr =
2005 user_wr->wr.rdma.remote_addr;
2006 next->wr.rdma.rkey =
2007 user_wr->wr.rdma.rkey;
2008 break;
0f39cf3d
RD		 2009 case IB_WR_SEND_WITH_IMM:
2010 next->ex.imm_data =
2011 (__be32 __force) user_wr->ex.imm_data;
2012 break;
2013 case IB_WR_SEND_WITH_INV:
2014 next->ex.invalidate_rkey =
2015 user_wr->ex.invalidate_rkey;
2016 break;
67cdb40c
RD		 2017 case IB_WR_ATOMIC_CMP_AND_SWP:
2018 case IB_WR_ATOMIC_FETCH_AND_ADD:
2019 next->wr.atomic.remote_addr =
2020 user_wr->wr.atomic.remote_addr;
2021 next->wr.atomic.compare_add =
2022 user_wr->wr.atomic.compare_add;
2023 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2024 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2025 break;
2026 default:
2027 break;
2028 }
2029 }
2030
2031 if (next->num_sge) {
2032 next->sg_list = (void *) next +
2033 ALIGN(sizeof *next, sizeof (struct ib_sge));
2034 if (copy_from_user(next->sg_list,
2035 buf + sizeof cmd +
2036 cmd.wr_count * cmd.wqe_size +
2037 sg_ind * sizeof (struct ib_sge),
2038 next->num_sge * sizeof (struct ib_sge))) {
2039 ret = -EFAULT;
9ead190b 2040 goto out_put;
67cdb40c
RD		 2041 }
2042 sg_ind += next->num_sge;
2043 } else
2044 next->sg_list = NULL;
2045 }
2046
2047 resp.bad_wr = 0;
0e0ec7e0 2048 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
67cdb40c
RD		 2049 if (ret)
2050 for (next = wr; next; next = next->next) {
2051 ++resp.bad_wr;
2052 if (next == bad_wr)
2053 break;
2054 }
2055
2056 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2057 &resp, sizeof resp))
2058 ret = -EFAULT;
2059
9ead190b
RD		 2060out_put:
2061 put_qp_read(qp);
67cdb40c
RD		 2062
2063 while (wr) {
9ead190b
RD		 2064 if (is_ud && wr->wr.ud.ah)
2065 put_ah_read(wr->wr.ud.ah);
67cdb40c
RD		 2066 next = wr->next;
2067 kfree(wr);
2068 wr = next;
2069 }
2070
18320828 2071out:
67cdb40c
RD		 2072 kfree(user_wr);
2073
2074 return ret ? ret : in_len;
2075}
2076
2077static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2078 int in_len,
2079 u32 wr_count,
2080 u32 sge_count,
2081 u32 wqe_size)
2082{
2083 struct ib_uverbs_recv_wr *user_wr;
2084 struct ib_recv_wr *wr = NULL, *last, *next;
2085 int sg_ind;
2086 int i;
2087 int ret;
2088
2089 if (in_len < wqe_size * wr_count +
2090 sge_count * sizeof (struct ib_uverbs_sge))
2091 return ERR_PTR(-EINVAL);
2092
2093 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2094 return ERR_PTR(-EINVAL);
2095
2096 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2097 if (!user_wr)
2098 return ERR_PTR(-ENOMEM);
2099
2100 sg_ind = 0;
2101 last = NULL;
2102 for (i = 0; i < wr_count; ++i) {
2103 if (copy_from_user(user_wr, buf + i * wqe_size,
2104 wqe_size)) {
2105 ret = -EFAULT;
2106 goto err;
2107 }
2108
2109 if (user_wr->num_sge + sg_ind > sge_count) {
2110 ret = -EINVAL;
2111 goto err;
2112 }
2113
2114 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2115 user_wr->num_sge * sizeof (struct ib_sge),
2116 GFP_KERNEL);
2117 if (!next) {
2118 ret = -ENOMEM;
2119 goto err;
2120 }
2121
2122 if (!last)
2123 wr = next;
2124 else
2125 last->next = next;
2126 last = next;
2127
2128 next->next = NULL;
2129 next->wr_id = user_wr->wr_id;
2130 next->num_sge = user_wr->num_sge;
2131
2132 if (next->num_sge) {
2133 next->sg_list = (void *) next +
2134 ALIGN(sizeof *next, sizeof (struct ib_sge));
2135 if (copy_from_user(next->sg_list,
2136 buf + wr_count * wqe_size +
2137 sg_ind * sizeof (struct ib_sge),
2138 next->num_sge * sizeof (struct ib_sge))) {
2139 ret = -EFAULT;
2140 goto err;
2141 }
2142 sg_ind += next->num_sge;
2143 } else
2144 next->sg_list = NULL;
2145 }
2146
2147 kfree(user_wr);
2148 return wr;
2149
2150err:
2151 kfree(user_wr);
2152
2153 while (wr) {
2154 next = wr->next;
2155 kfree(wr);
2156 wr = next;
2157 }
2158
2159 return ERR_PTR(ret);
2160}
2161
2162ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
a74cd4af
RD		 2163 const char __user *buf, int in_len,
2164 int out_len)
67cdb40c
RD		 2165{
2166 struct ib_uverbs_post_recv cmd;
2167 struct ib_uverbs_post_recv_resp resp;
2168 struct ib_recv_wr *wr, *next, *bad_wr;
2169 struct ib_qp *qp;
2170 ssize_t ret = -EINVAL;
2171
2172 if (copy_from_user(&cmd, buf, sizeof cmd))
2173 return -EFAULT;
2174
2175 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2176 in_len - sizeof cmd, cmd.wr_count,
2177 cmd.sge_count, cmd.wqe_size);
2178 if (IS_ERR(wr))
2179 return PTR_ERR(wr);
2180
9ead190b
RD		 2181 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2182 if (!qp)
67cdb40c
RD		 2183 goto out;
2184
2185 resp.bad_wr = 0;
0e0ec7e0 2186 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
9ead190b
RD		 2187
2188 put_qp_read(qp);
2189
67cdb40c
RD		 2190 if (ret)
2191 for (next = wr; next; next = next->next) {
2192 ++resp.bad_wr;
2193 if (next == bad_wr)
2194 break;
2195 }
2196
67cdb40c
RD		 2197 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2198 &resp, sizeof resp))
2199 ret = -EFAULT;
2200
2201out:
67cdb40c
RD		 2202 while (wr) {
2203 next = wr->next;
2204 kfree(wr);
2205 wr = next;
2206 }
2207
2208 return ret ? ret : in_len;
2209}
2210
2211ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
a74cd4af
RD		 2212 const char __user *buf, int in_len,
2213 int out_len)
67cdb40c
RD		 2214{
2215 struct ib_uverbs_post_srq_recv cmd;
2216 struct ib_uverbs_post_srq_recv_resp resp;
2217 struct ib_recv_wr *wr, *next, *bad_wr;
2218 struct ib_srq *srq;
2219 ssize_t ret = -EINVAL;
2220
2221 if (copy_from_user(&cmd, buf, sizeof cmd))
2222 return -EFAULT;
2223
2224 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2225 in_len - sizeof cmd, cmd.wr_count,
2226 cmd.sge_count, cmd.wqe_size);
2227 if (IS_ERR(wr))
2228 return PTR_ERR(wr);
2229
9ead190b
RD		 2230 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2231 if (!srq)
67cdb40c
RD		 2232 goto out;
2233
2234 resp.bad_wr = 0;
2235 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
9ead190b
RD		 2236
2237 put_srq_read(srq);
2238
67cdb40c
RD		 2239 if (ret)
2240 for (next = wr; next; next = next->next) {
2241 ++resp.bad_wr;
2242 if (next == bad_wr)
2243 break;
2244 }
2245
67cdb40c
RD		 2246 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2247 &resp, sizeof resp))
2248 ret = -EFAULT;
2249
2250out:
67cdb40c
RD		 2251 while (wr) {
2252 next = wr->next;
2253 kfree(wr);
2254 wr = next;
2255 }
2256
2257 return ret ? ret : in_len;
2258}
2259
2260ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2261 const char __user *buf, int in_len,
2262 int out_len)
2263{
2264 struct ib_uverbs_create_ah cmd;
2265 struct ib_uverbs_create_ah_resp resp;
2266 struct ib_uobject *uobj;
2267 struct ib_pd *pd;
2268 struct ib_ah *ah;
2269 struct ib_ah_attr attr;
2270 int ret;
2271
2272 if (out_len < sizeof resp)
2273 return -ENOSPC;
2274
2275 if (copy_from_user(&cmd, buf, sizeof cmd))
2276 return -EFAULT;
2277
2278 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2279 if (!uobj)
2280 return -ENOMEM;
2281
3bea57a5 2282 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
9ead190b 2283 down_write(&uobj->mutex);
67cdb40c 2284
9ead190b
RD		 2285 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2286 if (!pd) {
67cdb40c 2287 ret = -EINVAL;
9ead190b 2288 goto err;
67cdb40c
RD		 2289 }
2290
67cdb40c
RD		 2291 attr.dlid = cmd.attr.dlid;
2292 attr.sl = cmd.attr.sl;
2293 attr.src_path_bits = cmd.attr.src_path_bits;
2294 attr.static_rate = cmd.attr.static_rate;
ea5d4a6a 2295 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
67cdb40c
RD		 2296 attr.port_num = cmd.attr.port_num;
2297 attr.grh.flow_label = cmd.attr.grh.flow_label;
2298 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2299 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2300 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2301 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2302
2303 ah = ib_create_ah(pd, &attr);
2304 if (IS_ERR(ah)) {
2305 ret = PTR_ERR(ah);
ec924b47 2306 goto err_put;
67cdb40c
RD		 2307 }
2308
9ead190b
RD		 2309 ah->uobject = uobj;
2310 uobj->object = ah;
67cdb40c 2311
9ead190b 2312 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
67cdb40c
RD		 2313 if (ret)
2314 goto err_destroy;
2315
2316 resp.ah_handle = uobj->id;
2317
2318 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2319 &resp, sizeof resp)) {
2320 ret = -EFAULT;
9ead190b 2321 goto err_copy;
67cdb40c
RD		 2322 }
2323
9ead190b
RD		 2324 put_pd_read(pd);
2325
95ed644f 2326 mutex_lock(&file->mutex);
67cdb40c 2327 list_add_tail(&uobj->list, &file->ucontext->ah_list);
95ed644f 2328 mutex_unlock(&file->mutex);
67cdb40c 2329
9ead190b
RD		 2330 uobj->live = 1;
2331
2332 up_write(&uobj->mutex);
67cdb40c
RD		 2333
2334 return in_len;
2335
9ead190b
RD		 2336err_copy:
2337 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
67cdb40c
RD		 2338
2339err_destroy:
2340 ib_destroy_ah(ah);
2341
ec924b47
MT		 2342err_put:
2343 put_pd_read(pd);
2344
9ead190b
RD		 2345err:
2346 put_uobj_write(uobj);
67cdb40c
RD		 2347 return ret;
2348}
2349
2350ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2351 const char __user *buf, int in_len, int out_len)
2352{
2353 struct ib_uverbs_destroy_ah cmd;
2354 struct ib_ah *ah;
2355 struct ib_uobject *uobj;
9ead190b 2356 int ret;
67cdb40c
RD		 2357
2358 if (copy_from_user(&cmd, buf, sizeof cmd))
2359 return -EFAULT;
2360
9ead190b
RD		 2361 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2362 if (!uobj)
2363 return -EINVAL;
2364 ah = uobj->object;
67cdb40c 2365
9ead190b
RD		 2366 ret = ib_destroy_ah(ah);
2367 if (!ret)
2368 uobj->live = 0;
67cdb40c 2369
9ead190b 2370 put_uobj_write(uobj);
67cdb40c 2371
67cdb40c 2372 if (ret)
9ead190b 2373 return ret;
67cdb40c 2374
9ead190b 2375 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
67cdb40c 2376
95ed644f 2377 mutex_lock(&file->mutex);
67cdb40c 2378 list_del(&uobj->list);
95ed644f 2379 mutex_unlock(&file->mutex);
67cdb40c 2380
9ead190b 2381 put_uobj(uobj);
67cdb40c 2382
9ead190b 2383 return in_len;
67cdb40c
RD		 2384}
2385
bc38a6ab
RD		 2386ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2387 const char __user *buf, int in_len,
2388 int out_len)
2389{
2390 struct ib_uverbs_attach_mcast cmd;
2391 struct ib_qp *qp;
9ead190b 2392 struct ib_uqp_object *obj;
f4e40156 2393 struct ib_uverbs_mcast_entry *mcast;
9ead190b 2394 int ret;
bc38a6ab
RD		 2395
2396 if (copy_from_user(&cmd, buf, sizeof cmd))
2397 return -EFAULT;
2398
e214a0fe 2399 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
9ead190b
RD		 2400 if (!qp)
2401 return -EINVAL;
f4e40156 2402
9ead190b 2403 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
f4e40156 2404
9ead190b 2405 list_for_each_entry(mcast, &obj->mcast_list, list)
f4e40156
JM		 2406 if (cmd.mlid == mcast->lid &&
2407 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2408 ret = 0;
9ead190b 2409 goto out_put;
f4e40156
JM		 2410 }
2411
2412 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2413 if (!mcast) {
2414 ret = -ENOMEM;
9ead190b 2415 goto out_put;
f4e40156
JM		 2416 }
2417
2418 mcast->lid = cmd.mlid;
2419 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
bc38a6ab 2420
f4e40156 2421 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
9ead190b
RD		 2422 if (!ret)
2423 list_add_tail(&mcast->list, &obj->mcast_list);
2424 else
f4e40156
JM		 2425 kfree(mcast);
2426
9ead190b 2427out_put:
e214a0fe 2428 put_qp_write(qp);
bc38a6ab
RD		 2429
2430 return ret ? ret : in_len;
2431}
2432
2433ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2434 const char __user *buf, int in_len,
2435 int out_len)
2436{
2437 struct ib_uverbs_detach_mcast cmd;
9ead190b 2438 struct ib_uqp_object *obj;
bc38a6ab 2439 struct ib_qp *qp;
f4e40156 2440 struct ib_uverbs_mcast_entry *mcast;
bc38a6ab
RD		 2441 int ret = -EINVAL;
2442
2443 if (copy_from_user(&cmd, buf, sizeof cmd))
2444 return -EFAULT;
2445
e214a0fe 2446 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
9ead190b
RD		 2447 if (!qp)
2448 return -EINVAL;
bc38a6ab 2449
f4e40156
JM		 2450 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2451 if (ret)
9ead190b 2452 goto out_put;
f4e40156 2453
9ead190b 2454 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
f4e40156 2455
9ead190b 2456 list_for_each_entry(mcast, &obj->mcast_list, list)
f4e40156
JM		 2457 if (cmd.mlid == mcast->lid &&
2458 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2459 list_del(&mcast->list);
2460 kfree(mcast);
2461 break;
2462 }
2463
9ead190b 2464out_put:
e214a0fe 2465 put_qp_write(qp);
bc38a6ab
RD		 2466
2467 return ret ? ret : in_len;
2468}
f520ba5a 2469
c89d1bed
SH		 2470static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
2471 struct ib_uverbs_create_xsrq *cmd,
2472 struct ib_udata *udata)
f520ba5a 2473{
f520ba5a 2474 struct ib_uverbs_create_srq_resp resp;
8541f8de 2475 struct ib_usrq_object *obj;
f520ba5a
RD		 2476 struct ib_pd *pd;
2477 struct ib_srq *srq;
8541f8de 2478 struct ib_uobject *uninitialized_var(xrcd_uobj);
f520ba5a
RD		 2479 struct ib_srq_init_attr attr;
2480 int ret;
2481
9ead190b
RD		 2482 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2483 if (!obj)
f520ba5a
RD		 2484 return -ENOMEM;
2485
3bea57a5 2486 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
8541f8de 2487 down_write(&obj->uevent.uobject.mutex);
f520ba5a 2488
8541f8de 2489 if (cmd->srq_type == IB_SRQT_XRC) {
8541f8de
SH		 2490 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
2491 if (!attr.ext.xrc.xrcd) {
2492 ret = -EINVAL;
5909ce54 2493 goto err;
8541f8de
SH		 2494 }
2495
2496 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2497 atomic_inc(&obj->uxrcd->refcnt);
5909ce54
RD		 2498
2499 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
2500 if (!attr.ext.xrc.cq) {
2501 ret = -EINVAL;
2502 goto err_put_xrcd;
2503 }
2504 }
2505
2506 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
2507 if (!pd) {
2508 ret = -EINVAL;
2509 goto err_put_cq;
8541f8de
SH		 2510 }
2511
f520ba5a
RD		 2512 attr.event_handler = ib_uverbs_srq_event_handler;
2513 attr.srq_context = file;
8541f8de
SH		 2514 attr.srq_type = cmd->srq_type;
2515 attr.attr.max_wr = cmd->max_wr;
2516 attr.attr.max_sge = cmd->max_sge;
2517 attr.attr.srq_limit = cmd->srq_limit;
f520ba5a 2518
8541f8de
SH		 2519 obj->uevent.events_reported = 0;
2520 INIT_LIST_HEAD(&obj->uevent.event_list);
f520ba5a 2521
8541f8de 2522 srq = pd->device->create_srq(pd, &attr, udata);
f520ba5a
RD		 2523 if (IS_ERR(srq)) {
2524 ret = PTR_ERR(srq);
ec924b47 2525 goto err_put;
f520ba5a
RD		 2526 }
2527
8541f8de
SH		 2528 srq->device = pd->device;
2529 srq->pd = pd;
2530 srq->srq_type = cmd->srq_type;
2531 srq->uobject = &obj->uevent.uobject;
f520ba5a
RD		 2532 srq->event_handler = attr.event_handler;
2533 srq->srq_context = attr.srq_context;
8541f8de
SH		 2534
2535 if (cmd->srq_type == IB_SRQT_XRC) {
2536 srq->ext.xrc.cq = attr.ext.xrc.cq;
2537 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
2538 atomic_inc(&attr.ext.xrc.cq->usecnt);
2539 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
2540 }
2541
f520ba5a
RD		 2542 atomic_inc(&pd->usecnt);
2543 atomic_set(&srq->usecnt, 0);
2544
8541f8de
SH		 2545 obj->uevent.uobject.object = srq;
2546 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
f520ba5a
RD		 2547 if (ret)
2548 goto err_destroy;
2549
9ead190b 2550 memset(&resp, 0, sizeof resp);
8541f8de 2551 resp.srq_handle = obj->uevent.uobject.id;
ea88fd16
DB		 2552 resp.max_wr = attr.attr.max_wr;
2553 resp.max_sge = attr.attr.max_sge;
8541f8de
SH		 2554 if (cmd->srq_type == IB_SRQT_XRC)
2555 resp.srqn = srq->ext.xrc.srq_num;
f520ba5a 2556
8541f8de 2557 if (copy_to_user((void __user *) (unsigned long) cmd->response,
f520ba5a
RD		 2558 &resp, sizeof resp)) {
2559 ret = -EFAULT;
9ead190b 2560 goto err_copy;
f520ba5a
RD		 2561 }
2562
8541f8de
SH		 2563 if (cmd->srq_type == IB_SRQT_XRC) {
2564 put_uobj_read(xrcd_uobj);
2565 put_cq_read(attr.ext.xrc.cq);
2566 }
9ead190b
RD		 2567 put_pd_read(pd);
2568
95ed644f 2569 mutex_lock(&file->mutex);
8541f8de 2570 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
95ed644f 2571 mutex_unlock(&file->mutex);
eb9d3cd5 2572
8541f8de 2573 obj->uevent.uobject.live = 1;
9ead190b 2574
8541f8de 2575 up_write(&obj->uevent.uobject.mutex);
f520ba5a 2576
8541f8de 2577 return 0;
f520ba5a 2578
9ead190b 2579err_copy:
8541f8de 2580 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
f520ba5a
RD		 2581
2582err_destroy:
2583 ib_destroy_srq(srq);
2584
ec924b47 2585err_put:
5909ce54 2586 put_pd_read(pd);
8541f8de
SH		 2587
2588err_put_cq:
2589 if (cmd->srq_type == IB_SRQT_XRC)
2590 put_cq_read(attr.ext.xrc.cq);
2591
5909ce54
RD		 2592err_put_xrcd:
2593 if (cmd->srq_type == IB_SRQT_XRC) {
2594 atomic_dec(&obj->uxrcd->refcnt);
2595 put_uobj_read(xrcd_uobj);
2596 }
ec924b47 2597
9ead190b 2598err:
8541f8de 2599 put_uobj_write(&obj->uevent.uobject);
f520ba5a
RD		 2600 return ret;
2601}
2602
8541f8de
SH		 2603ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
2604 const char __user *buf, int in_len,
2605 int out_len)
2606{
2607 struct ib_uverbs_create_srq cmd;
2608 struct ib_uverbs_create_xsrq xcmd;
2609 struct ib_uverbs_create_srq_resp resp;
2610 struct ib_udata udata;
2611 int ret;
2612
2613 if (out_len < sizeof resp)
2614 return -ENOSPC;
2615
2616 if (copy_from_user(&cmd, buf, sizeof cmd))
2617 return -EFAULT;
2618
2619 xcmd.response = cmd.response;
2620 xcmd.user_handle = cmd.user_handle;
2621 xcmd.srq_type = IB_SRQT_BASIC;
2622 xcmd.pd_handle = cmd.pd_handle;
2623 xcmd.max_wr = cmd.max_wr;
2624 xcmd.max_sge = cmd.max_sge;
2625 xcmd.srq_limit = cmd.srq_limit;
2626
2627 INIT_UDATA(&udata, buf + sizeof cmd,
2628 (unsigned long) cmd.response + sizeof resp,
2629 in_len - sizeof cmd, out_len - sizeof resp);
2630
2631 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
2632 if (ret)
2633 return ret;
2634
2635 return in_len;
2636}
2637
2638ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
2639 const char __user *buf, int in_len, int out_len)
2640{
2641 struct ib_uverbs_create_xsrq cmd;
2642 struct ib_uverbs_create_srq_resp resp;
2643 struct ib_udata udata;
2644 int ret;
2645
2646 if (out_len < sizeof resp)
2647 return -ENOSPC;
2648
2649 if (copy_from_user(&cmd, buf, sizeof cmd))
2650 return -EFAULT;
2651
2652 INIT_UDATA(&udata, buf + sizeof cmd,
2653 (unsigned long) cmd.response + sizeof resp,
2654 in_len - sizeof cmd, out_len - sizeof resp);
2655
2656 ret = __uverbs_create_xsrq(file, &cmd, &udata);
2657 if (ret)
2658 return ret;
2659
2660 return in_len;
2661}
2662
f520ba5a
RD		 2663ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2664 const char __user *buf, int in_len,
2665 int out_len)
2666{
2667 struct ib_uverbs_modify_srq cmd;
9bc57e2d 2668 struct ib_udata udata;
f520ba5a
RD		 2669 struct ib_srq *srq;
2670 struct ib_srq_attr attr;
2671 int ret;
2672
2673 if (copy_from_user(&cmd, buf, sizeof cmd))
2674 return -EFAULT;
2675
9bc57e2d
RC		 2676 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2677 out_len);
2678
9ead190b
RD		 2679 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2680 if (!srq)
2681 return -EINVAL;
f520ba5a
RD		 2682
2683 attr.max_wr = cmd.max_wr;
f520ba5a
RD		 2684 attr.srq_limit = cmd.srq_limit;
2685
9bc57e2d 2686 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
f520ba5a 2687
9ead190b 2688 put_srq_read(srq);
f520ba5a
RD		 2689
2690 return ret ? ret : in_len;
2691}
2692
8bdb0e86
DB		 2693ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2694 const char __user *buf,
2695 int in_len, int out_len)
2696{
2697 struct ib_uverbs_query_srq cmd;
2698 struct ib_uverbs_query_srq_resp resp;
2699 struct ib_srq_attr attr;
2700 struct ib_srq *srq;
2701 int ret;
2702
2703 if (out_len < sizeof resp)
2704 return -ENOSPC;
2705
2706 if (copy_from_user(&cmd, buf, sizeof cmd))
2707 return -EFAULT;
2708
9ead190b
RD		 2709 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2710 if (!srq)
2711 return -EINVAL;
8bdb0e86 2712
9ead190b 2713 ret = ib_query_srq(srq, &attr);
8bdb0e86 2714
9ead190b 2715 put_srq_read(srq);
8bdb0e86
DB		 2716
2717 if (ret)
9ead190b 2718 return ret;
8bdb0e86
DB		 2719
2720 memset(&resp, 0, sizeof resp);
2721
2722 resp.max_wr = attr.max_wr;
2723 resp.max_sge = attr.max_sge;
2724 resp.srq_limit = attr.srq_limit;
2725
2726 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2727 &resp, sizeof resp))
9ead190b 2728 return -EFAULT;
8bdb0e86 2729
9ead190b 2730 return in_len;
8bdb0e86
DB		 2731}
2732
f520ba5a
RD		 2733ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2734 const char __user *buf, int in_len,
2735 int out_len)
2736{
63aaf647
RD		 2737 struct ib_uverbs_destroy_srq cmd;
2738 struct ib_uverbs_destroy_srq_resp resp;
9ead190b 2739 struct ib_uobject *uobj;
63aaf647 2740 struct ib_srq *srq;
9ead190b 2741 struct ib_uevent_object *obj;
63aaf647 2742 int ret = -EINVAL;
f520ba5a
RD		 2743
2744 if (copy_from_user(&cmd, buf, sizeof cmd))
2745 return -EFAULT;
2746
9ead190b
RD		 2747 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2748 if (!uobj)
2749 return -EINVAL;
2750 srq = uobj->object;
2751 obj = container_of(uobj, struct ib_uevent_object, uobject);
63aaf647 2752
9ead190b
RD		 2753 ret = ib_destroy_srq(srq);
2754 if (!ret)
2755 uobj->live = 0;
f520ba5a 2756
9ead190b 2757 put_uobj_write(uobj);
f520ba5a 2758
f520ba5a 2759 if (ret)
9ead190b 2760 return ret;
f520ba5a 2761
9ead190b 2762 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
f520ba5a 2763
95ed644f 2764 mutex_lock(&file->mutex);
9ead190b 2765 list_del(&uobj->list);
95ed644f 2766 mutex_unlock(&file->mutex);
f520ba5a 2767
9ead190b 2768 ib_uverbs_release_uevent(file, obj);
63aaf647 2769
9ead190b
RD		 2770 memset(&resp, 0, sizeof resp);
2771 resp.events_reported = obj->events_reported;
63aaf647 2772
9ead190b 2773 put_uobj(uobj);
f520ba5a 2774
63aaf647
RD		 2775 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2776 &resp, sizeof resp))
2777 ret = -EFAULT;
2778
f520ba5a
RD		 2779 return ret ? ret : in_len;
2780}
Linux 6.x block layer and io_uring tree(s)