blob: 01d70084aebe8c0737dc685c0bf3c4db3a57b4ec [file] [log] [blame]
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001/*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
Roland Dreierf7c6a7b2007-03-04 16:15:11 -08003 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
Roland Dreiereb9d3cd2005-09-27 15:07:25 -07004 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
Dotan Barak8bdb0e82006-02-13 16:31:57 -08005 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
Roland Dreierbc38a6a2005-07-07 17:57:13 -07006 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 *
35 * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
36 */
37
Roland Dreier6b735972005-09-26 13:53:25 -070038#include <linux/file.h>
Roland Dreier70a30e12005-10-28 15:38:26 -070039#include <linux/fs.h>
Roland Dreier6b735972005-09-26 13:53:25 -070040
Roland Dreierbc38a6a2005-07-07 17:57:13 -070041#include <asm/uaccess.h>
42
43#include "uverbs.h"
44
Roland Dreier43db2bc2006-07-23 15:16:04 -070045static struct lock_class_key pd_lock_key;
46static struct lock_class_key mr_lock_key;
47static struct lock_class_key cq_lock_key;
48static struct lock_class_key qp_lock_key;
49static struct lock_class_key ah_lock_key;
50static struct lock_class_key srq_lock_key;
51
Roland Dreierbc38a6a2005-07-07 17:57:13 -070052#define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
53 do { \
54 (udata)->inbuf = (void __user *) (ibuf); \
55 (udata)->outbuf = (void __user *) (obuf); \
56 (udata)->inlen = (ilen); \
57 (udata)->outlen = (olen); \
58 } while (0)
59
Roland Dreier9ead1902006-06-17 20:44:49 -070060/*
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,
Roland Dreier43db2bc2006-07-23 15:16:04 -070086 struct ib_ucontext *context, struct lock_class_key *key)
Roland Dreier9ead1902006-06-17 20:44:49 -070087{
88 uobj->user_handle = user_handle;
89 uobj->context = context;
90 kref_init(&uobj->ref);
91 init_rwsem(&uobj->mutex);
Roland Dreier43db2bc2006-07-23 15:16:04 -070092 lockdep_set_class(&uobj->mutex, key);
Roland Dreier9ead1902006-06-17 20:44:49 -070093 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)
Roland Dreier34631752006-06-17 20:37:40 -0700119{
120 int ret;
121
122retry:
123 if (!idr_pre_get(idr, GFP_KERNEL))
124 return -ENOMEM;
125
Roland Dreier9ead1902006-06-17 20:44:49 -0700126 spin_lock(&ib_uverbs_idr_lock);
Roland Dreier34631752006-06-17 20:37:40 -0700127 ret = idr_get_new(idr, uobj, &uobj->id);
Roland Dreier9ead1902006-06-17 20:44:49 -0700128 spin_unlock(&ib_uverbs_idr_lock);
Roland Dreier34631752006-06-17 20:37:40 -0700129
130 if (ret == -EAGAIN)
131 goto retry;
132
133 return ret;
134}
135
Roland Dreier9ead1902006-06-17 20:44:49 -0700136void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
137{
138 spin_lock(&ib_uverbs_idr_lock);
139 idr_remove(idr, uobj->id);
140 spin_unlock(&ib_uverbs_idr_lock);
141}
142
143static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
144 struct ib_ucontext *context)
145{
146 struct ib_uobject *uobj;
147
148 spin_lock(&ib_uverbs_idr_lock);
149 uobj = idr_find(idr, id);
150 if (uobj)
151 kref_get(&uobj->ref);
152 spin_unlock(&ib_uverbs_idr_lock);
153
154 return uobj;
155}
156
157static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700158 struct ib_ucontext *context, int nested)
Roland Dreier9ead1902006-06-17 20:44:49 -0700159{
160 struct ib_uobject *uobj;
161
162 uobj = __idr_get_uobj(idr, id, context);
163 if (!uobj)
164 return NULL;
165
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700166 if (nested)
167 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
168 else
169 down_read(&uobj->mutex);
Roland Dreier9ead1902006-06-17 20:44:49 -0700170 if (!uobj->live) {
171 put_uobj_read(uobj);
172 return NULL;
173 }
174
175 return uobj;
176}
177
178static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
179 struct ib_ucontext *context)
180{
181 struct ib_uobject *uobj;
182
183 uobj = __idr_get_uobj(idr, id, context);
184 if (!uobj)
185 return NULL;
186
187 down_write(&uobj->mutex);
188 if (!uobj->live) {
189 put_uobj_write(uobj);
190 return NULL;
191 }
192
193 return uobj;
194}
195
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700196static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
197 int nested)
Roland Dreier9ead1902006-06-17 20:44:49 -0700198{
199 struct ib_uobject *uobj;
200
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700201 uobj = idr_read_uobj(idr, id, context, nested);
Roland Dreier9ead1902006-06-17 20:44:49 -0700202 return uobj ? uobj->object : NULL;
203}
204
205static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
206{
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700207 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
Roland Dreier9ead1902006-06-17 20:44:49 -0700208}
209
210static void put_pd_read(struct ib_pd *pd)
211{
212 put_uobj_read(pd->uobject);
213}
214
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700215static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
Roland Dreier9ead1902006-06-17 20:44:49 -0700216{
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700217 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
Roland Dreier9ead1902006-06-17 20:44:49 -0700218}
219
220static void put_cq_read(struct ib_cq *cq)
221{
222 put_uobj_read(cq->uobject);
223}
224
225static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
226{
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700227 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
Roland Dreier9ead1902006-06-17 20:44:49 -0700228}
229
230static void put_ah_read(struct ib_ah *ah)
231{
232 put_uobj_read(ah->uobject);
233}
234
235static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
236{
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700237 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
Roland Dreier9ead1902006-06-17 20:44:49 -0700238}
239
240static void put_qp_read(struct ib_qp *qp)
241{
242 put_uobj_read(qp->uobject);
243}
244
245static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
246{
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700247 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
Roland Dreier9ead1902006-06-17 20:44:49 -0700248}
249
250static void put_srq_read(struct ib_srq *srq)
251{
252 put_uobj_read(srq->uobject);
253}
254
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700255ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
256 const char __user *buf,
257 int in_len, int out_len)
258{
259 struct ib_uverbs_get_context cmd;
260 struct ib_uverbs_get_context_resp resp;
261 struct ib_udata udata;
262 struct ib_device *ibdev = file->device->ib_dev;
Roland Dreier63c47c22005-09-26 13:01:03 -0700263 struct ib_ucontext *ucontext;
Roland Dreier6b735972005-09-26 13:53:25 -0700264 struct file *filp;
Roland Dreier63c47c22005-09-26 13:01:03 -0700265 int ret;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700266
267 if (out_len < sizeof resp)
268 return -ENOSPC;
269
270 if (copy_from_user(&cmd, buf, sizeof cmd))
271 return -EFAULT;
272
Ingo Molnar95ed6442006-01-13 14:51:39 -0800273 mutex_lock(&file->mutex);
Roland Dreier63c47c22005-09-26 13:01:03 -0700274
275 if (file->ucontext) {
276 ret = -EINVAL;
277 goto err;
278 }
279
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700280 INIT_UDATA(&udata, buf + sizeof cmd,
281 (unsigned long) cmd.response + sizeof resp,
282 in_len - sizeof cmd, out_len - sizeof resp);
283
Roland Dreier63c47c22005-09-26 13:01:03 -0700284 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
Ganapathi CH77f76012006-06-17 20:37:40 -0700285 if (IS_ERR(ucontext)) {
286 ret = PTR_ERR(file->ucontext);
287 goto err;
288 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700289
Roland Dreier63c47c22005-09-26 13:01:03 -0700290 ucontext->device = ibdev;
291 INIT_LIST_HEAD(&ucontext->pd_list);
292 INIT_LIST_HEAD(&ucontext->mr_list);
293 INIT_LIST_HEAD(&ucontext->mw_list);
294 INIT_LIST_HEAD(&ucontext->cq_list);
295 INIT_LIST_HEAD(&ucontext->qp_list);
296 INIT_LIST_HEAD(&ucontext->srq_list);
297 INIT_LIST_HEAD(&ucontext->ah_list);
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800298 ucontext->closing = 0;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700299
Roland Dreier6b735972005-09-26 13:53:25 -0700300 resp.num_comp_vectors = file->device->num_comp_vectors;
301
302 filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
303 if (IS_ERR(filp)) {
304 ret = PTR_ERR(filp);
305 goto err_free;
306 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700307
308 if (copy_to_user((void __user *) (unsigned long) cmd.response,
Roland Dreier63c47c22005-09-26 13:01:03 -0700309 &resp, sizeof resp)) {
310 ret = -EFAULT;
Roland Dreier6b735972005-09-26 13:53:25 -0700311 goto err_file;
Roland Dreier63c47c22005-09-26 13:01:03 -0700312 }
313
Roland Dreier6b735972005-09-26 13:53:25 -0700314 file->async_file = filp->private_data;
315
316 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
317 ib_uverbs_event_handler);
318 ret = ib_register_event_handler(&file->event_handler);
319 if (ret)
320 goto err_file;
321
322 kref_get(&file->async_file->ref);
323 kref_get(&file->ref);
Roland Dreier70a30e12005-10-28 15:38:26 -0700324 file->ucontext = ucontext;
Roland Dreier6b735972005-09-26 13:53:25 -0700325
326 fd_install(resp.async_fd, filp);
327
Ingo Molnar95ed6442006-01-13 14:51:39 -0800328 mutex_unlock(&file->mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700329
330 return in_len;
331
Roland Dreier6b735972005-09-26 13:53:25 -0700332err_file:
333 put_unused_fd(resp.async_fd);
334 fput(filp);
335
Roland Dreier63c47c22005-09-26 13:01:03 -0700336err_free:
337 ibdev->dealloc_ucontext(ucontext);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700338
Roland Dreier63c47c22005-09-26 13:01:03 -0700339err:
Ingo Molnar95ed6442006-01-13 14:51:39 -0800340 mutex_unlock(&file->mutex);
Roland Dreier63c47c22005-09-26 13:01:03 -0700341 return ret;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700342}
343
344ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
345 const char __user *buf,
346 int in_len, int out_len)
347{
348 struct ib_uverbs_query_device cmd;
349 struct ib_uverbs_query_device_resp resp;
350 struct ib_device_attr attr;
351 int ret;
352
353 if (out_len < sizeof resp)
354 return -ENOSPC;
355
356 if (copy_from_user(&cmd, buf, sizeof cmd))
357 return -EFAULT;
358
359 ret = ib_query_device(file->device->ib_dev, &attr);
360 if (ret)
361 return ret;
362
363 memset(&resp, 0, sizeof resp);
364
365 resp.fw_ver = attr.fw_ver;
Sean Heftycf311cd2006-01-10 07:39:34 -0800366 resp.node_guid = file->device->ib_dev->node_guid;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700367 resp.sys_image_guid = attr.sys_image_guid;
368 resp.max_mr_size = attr.max_mr_size;
369 resp.page_size_cap = attr.page_size_cap;
370 resp.vendor_id = attr.vendor_id;
371 resp.vendor_part_id = attr.vendor_part_id;
372 resp.hw_ver = attr.hw_ver;
373 resp.max_qp = attr.max_qp;
374 resp.max_qp_wr = attr.max_qp_wr;
375 resp.device_cap_flags = attr.device_cap_flags;
376 resp.max_sge = attr.max_sge;
377 resp.max_sge_rd = attr.max_sge_rd;
378 resp.max_cq = attr.max_cq;
379 resp.max_cqe = attr.max_cqe;
380 resp.max_mr = attr.max_mr;
381 resp.max_pd = attr.max_pd;
382 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
383 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
384 resp.max_res_rd_atom = attr.max_res_rd_atom;
385 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
386 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
387 resp.atomic_cap = attr.atomic_cap;
388 resp.max_ee = attr.max_ee;
389 resp.max_rdd = attr.max_rdd;
390 resp.max_mw = attr.max_mw;
391 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
392 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
393 resp.max_mcast_grp = attr.max_mcast_grp;
394 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
395 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
396 resp.max_ah = attr.max_ah;
397 resp.max_fmr = attr.max_fmr;
398 resp.max_map_per_fmr = attr.max_map_per_fmr;
399 resp.max_srq = attr.max_srq;
400 resp.max_srq_wr = attr.max_srq_wr;
401 resp.max_srq_sge = attr.max_srq_sge;
402 resp.max_pkeys = attr.max_pkeys;
403 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
404 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
405
406 if (copy_to_user((void __user *) (unsigned long) cmd.response,
407 &resp, sizeof resp))
408 return -EFAULT;
409
410 return in_len;
411}
412
413ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
414 const char __user *buf,
415 int in_len, int out_len)
416{
417 struct ib_uverbs_query_port cmd;
418 struct ib_uverbs_query_port_resp resp;
419 struct ib_port_attr attr;
420 int ret;
421
422 if (out_len < sizeof resp)
423 return -ENOSPC;
424
425 if (copy_from_user(&cmd, buf, sizeof cmd))
426 return -EFAULT;
427
428 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
429 if (ret)
430 return ret;
431
432 memset(&resp, 0, sizeof resp);
433
434 resp.state = attr.state;
435 resp.max_mtu = attr.max_mtu;
436 resp.active_mtu = attr.active_mtu;
437 resp.gid_tbl_len = attr.gid_tbl_len;
438 resp.port_cap_flags = attr.port_cap_flags;
439 resp.max_msg_sz = attr.max_msg_sz;
440 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
441 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
442 resp.pkey_tbl_len = attr.pkey_tbl_len;
443 resp.lid = attr.lid;
444 resp.sm_lid = attr.sm_lid;
445 resp.lmc = attr.lmc;
446 resp.max_vl_num = attr.max_vl_num;
447 resp.sm_sl = attr.sm_sl;
448 resp.subnet_timeout = attr.subnet_timeout;
449 resp.init_type_reply = attr.init_type_reply;
450 resp.active_width = attr.active_width;
451 resp.active_speed = attr.active_speed;
452 resp.phys_state = attr.phys_state;
453
454 if (copy_to_user((void __user *) (unsigned long) cmd.response,
455 &resp, sizeof resp))
456 return -EFAULT;
457
458 return in_len;
459}
460
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700461ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
462 const char __user *buf,
463 int in_len, int out_len)
464{
465 struct ib_uverbs_alloc_pd cmd;
466 struct ib_uverbs_alloc_pd_resp resp;
467 struct ib_udata udata;
468 struct ib_uobject *uobj;
469 struct ib_pd *pd;
470 int ret;
471
472 if (out_len < sizeof resp)
473 return -ENOSPC;
474
475 if (copy_from_user(&cmd, buf, sizeof cmd))
476 return -EFAULT;
477
478 INIT_UDATA(&udata, buf + sizeof cmd,
479 (unsigned long) cmd.response + sizeof resp,
480 in_len - sizeof cmd, out_len - sizeof resp);
481
482 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
483 if (!uobj)
484 return -ENOMEM;
485
Roland Dreier43db2bc2006-07-23 15:16:04 -0700486 init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
Roland Dreier9ead1902006-06-17 20:44:49 -0700487 down_write(&uobj->mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700488
489 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
490 file->ucontext, &udata);
491 if (IS_ERR(pd)) {
492 ret = PTR_ERR(pd);
493 goto err;
494 }
495
496 pd->device = file->device->ib_dev;
497 pd->uobject = uobj;
498 atomic_set(&pd->usecnt, 0);
499
Roland Dreier9ead1902006-06-17 20:44:49 -0700500 uobj->object = pd;
501 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700502 if (ret)
Roland Dreier9ead1902006-06-17 20:44:49 -0700503 goto err_idr;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700504
505 memset(&resp, 0, sizeof resp);
506 resp.pd_handle = uobj->id;
507
508 if (copy_to_user((void __user *) (unsigned long) cmd.response,
509 &resp, sizeof resp)) {
510 ret = -EFAULT;
Roland Dreier9ead1902006-06-17 20:44:49 -0700511 goto err_copy;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700512 }
513
Ingo Molnar95ed6442006-01-13 14:51:39 -0800514 mutex_lock(&file->mutex);
Roland Dreiereb9d3cd2005-09-27 15:07:25 -0700515 list_add_tail(&uobj->list, &file->ucontext->pd_list);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800516 mutex_unlock(&file->mutex);
Roland Dreiereb9d3cd2005-09-27 15:07:25 -0700517
Roland Dreier9ead1902006-06-17 20:44:49 -0700518 uobj->live = 1;
519
520 up_write(&uobj->mutex);
Roland Dreiereb9d3cd2005-09-27 15:07:25 -0700521
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700522 return in_len;
523
Roland Dreier9ead1902006-06-17 20:44:49 -0700524err_copy:
525 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700526
Roland Dreier9ead1902006-06-17 20:44:49 -0700527err_idr:
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700528 ib_dealloc_pd(pd);
529
530err:
Roland Dreier9ead1902006-06-17 20:44:49 -0700531 put_uobj_write(uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700532 return ret;
533}
534
535ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
536 const char __user *buf,
537 int in_len, int out_len)
538{
539 struct ib_uverbs_dealloc_pd cmd;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700540 struct ib_uobject *uobj;
Roland Dreier9ead1902006-06-17 20:44:49 -0700541 int ret;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700542
543 if (copy_from_user(&cmd, buf, sizeof cmd))
544 return -EFAULT;
545
Roland Dreier9ead1902006-06-17 20:44:49 -0700546 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
547 if (!uobj)
548 return -EINVAL;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700549
Roland Dreier9ead1902006-06-17 20:44:49 -0700550 ret = ib_dealloc_pd(uobj->object);
551 if (!ret)
552 uobj->live = 0;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700553
Roland Dreier9ead1902006-06-17 20:44:49 -0700554 put_uobj_write(uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700555
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700556 if (ret)
Roland Dreier9ead1902006-06-17 20:44:49 -0700557 return ret;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700558
Roland Dreier9ead1902006-06-17 20:44:49 -0700559 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700560
Ingo Molnar95ed6442006-01-13 14:51:39 -0800561 mutex_lock(&file->mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700562 list_del(&uobj->list);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800563 mutex_unlock(&file->mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700564
Roland Dreier9ead1902006-06-17 20:44:49 -0700565 put_uobj(uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700566
Roland Dreier9ead1902006-06-17 20:44:49 -0700567 return in_len;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700568}
569
570ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
571 const char __user *buf, int in_len,
572 int out_len)
573{
574 struct ib_uverbs_reg_mr cmd;
575 struct ib_uverbs_reg_mr_resp resp;
576 struct ib_udata udata;
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800577 struct ib_uobject *uobj;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700578 struct ib_pd *pd;
579 struct ib_mr *mr;
580 int ret;
581
582 if (out_len < sizeof resp)
583 return -ENOSPC;
584
585 if (copy_from_user(&cmd, buf, sizeof cmd))
586 return -EFAULT;
587
588 INIT_UDATA(&udata, buf + sizeof cmd,
589 (unsigned long) cmd.response + sizeof resp,
590 in_len - sizeof cmd, out_len - sizeof resp);
591
592 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
593 return -EINVAL;
594
Roland Dreierf5753942005-10-03 09:18:02 -0700595 /*
596 * Local write permission is required if remote write or
597 * remote atomic permission is also requested.
598 */
599 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
600 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
601 return -EINVAL;
602
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800603 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
604 if (!uobj)
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700605 return -ENOMEM;
606
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800607 init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
608 down_write(&uobj->mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700609
Roland Dreier9ead1902006-06-17 20:44:49 -0700610 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
Roland Dreieraaf1aef2007-02-22 13:16:51 -0800611 if (!pd) {
612 ret = -EINVAL;
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800613 goto err_free;
Roland Dreieraaf1aef2007-02-22 13:16:51 -0800614 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700615
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800616 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
617 cmd.access_flags, &udata);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700618 if (IS_ERR(mr)) {
619 ret = PTR_ERR(mr);
Roland Dreier9ead1902006-06-17 20:44:49 -0700620 goto err_put;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700621 }
622
623 mr->device = pd->device;
624 mr->pd = pd;
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800625 mr->uobject = uobj;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700626 atomic_inc(&pd->usecnt);
627 atomic_set(&mr->usecnt, 0);
628
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800629 uobj->object = mr;
630 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700631 if (ret)
632 goto err_unreg;
633
Roland Dreier9ead1902006-06-17 20:44:49 -0700634 memset(&resp, 0, sizeof resp);
635 resp.lkey = mr->lkey;
636 resp.rkey = mr->rkey;
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800637 resp.mr_handle = uobj->id;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700638
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700639 if (copy_to_user((void __user *) (unsigned long) cmd.response,
640 &resp, sizeof resp)) {
641 ret = -EFAULT;
Roland Dreier9ead1902006-06-17 20:44:49 -0700642 goto err_copy;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700643 }
644
Roland Dreier9ead1902006-06-17 20:44:49 -0700645 put_pd_read(pd);
646
Ingo Molnar95ed6442006-01-13 14:51:39 -0800647 mutex_lock(&file->mutex);
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800648 list_add_tail(&uobj->list, &file->ucontext->mr_list);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800649 mutex_unlock(&file->mutex);
Roland Dreiereb9d3cd2005-09-27 15:07:25 -0700650
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800651 uobj->live = 1;
Roland Dreier9ead1902006-06-17 20:44:49 -0700652
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800653 up_write(&uobj->mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700654
655 return in_len;
656
Roland Dreier9ead1902006-06-17 20:44:49 -0700657err_copy:
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800658 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700659
660err_unreg:
661 ib_dereg_mr(mr);
662
Roland Dreier9ead1902006-06-17 20:44:49 -0700663err_put:
664 put_pd_read(pd);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700665
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700666err_free:
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800667 put_uobj_write(uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700668 return ret;
669}
670
671ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
672 const char __user *buf, int in_len,
673 int out_len)
674{
675 struct ib_uverbs_dereg_mr cmd;
676 struct ib_mr *mr;
Roland Dreier9ead1902006-06-17 20:44:49 -0700677 struct ib_uobject *uobj;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700678 int ret = -EINVAL;
679
680 if (copy_from_user(&cmd, buf, sizeof cmd))
681 return -EFAULT;
682
Roland Dreier9ead1902006-06-17 20:44:49 -0700683 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
684 if (!uobj)
685 return -EINVAL;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700686
Roland Dreierf7c6a7b2007-03-04 16:15:11 -0800687 mr = uobj->object;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700688
689 ret = ib_dereg_mr(mr);
Roland Dreier9ead1902006-06-17 20:44:49 -0700690 if (!ret)
691 uobj->live = 0;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700692
Roland Dreier9ead1902006-06-17 20:44:49 -0700693 put_uobj_write(uobj);
694
695 if (ret)
696 return ret;
697
698 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700699
Ingo Molnar95ed6442006-01-13 14:51:39 -0800700 mutex_lock(&file->mutex);
Roland Dreier9ead1902006-06-17 20:44:49 -0700701 list_del(&uobj->list);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800702 mutex_unlock(&file->mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700703
Roland Dreier9ead1902006-06-17 20:44:49 -0700704 put_uobj(uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700705
Roland Dreier9ead1902006-06-17 20:44:49 -0700706 return in_len;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700707}
708
Roland Dreier6b735972005-09-26 13:53:25 -0700709ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
710 const char __user *buf, int in_len,
711 int out_len)
712{
713 struct ib_uverbs_create_comp_channel cmd;
714 struct ib_uverbs_create_comp_channel_resp resp;
715 struct file *filp;
716
717 if (out_len < sizeof resp)
718 return -ENOSPC;
719
720 if (copy_from_user(&cmd, buf, sizeof cmd))
721 return -EFAULT;
722
723 filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
724 if (IS_ERR(filp))
725 return PTR_ERR(filp);
726
727 if (copy_to_user((void __user *) (unsigned long) cmd.response,
728 &resp, sizeof resp)) {
729 put_unused_fd(resp.fd);
730 fput(filp);
731 return -EFAULT;
732 }
733
734 fd_install(resp.fd, filp);
735 return in_len;
736}
737
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700738ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
739 const char __user *buf, int in_len,
740 int out_len)
741{
742 struct ib_uverbs_create_cq cmd;
743 struct ib_uverbs_create_cq_resp resp;
744 struct ib_udata udata;
Roland Dreier9ead1902006-06-17 20:44:49 -0700745 struct ib_ucq_object *obj;
Roland Dreier6b735972005-09-26 13:53:25 -0700746 struct ib_uverbs_event_file *ev_file = NULL;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700747 struct ib_cq *cq;
748 int ret;
749
750 if (out_len < sizeof resp)
751 return -ENOSPC;
752
753 if (copy_from_user(&cmd, buf, sizeof cmd))
754 return -EFAULT;
755
756 INIT_UDATA(&udata, buf + sizeof cmd,
757 (unsigned long) cmd.response + sizeof resp,
758 in_len - sizeof cmd, out_len - sizeof resp);
759
Roland Dreier6b735972005-09-26 13:53:25 -0700760 if (cmd.comp_vector >= file->device->num_comp_vectors)
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700761 return -EINVAL;
762
Roland Dreier9ead1902006-06-17 20:44:49 -0700763 obj = kmalloc(sizeof *obj, GFP_KERNEL);
764 if (!obj)
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700765 return -ENOMEM;
766
Roland Dreier43db2bc2006-07-23 15:16:04 -0700767 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
Roland Dreier9ead1902006-06-17 20:44:49 -0700768 down_write(&obj->uobject.mutex);
769
Jack Morgensteinac4e7b32006-01-06 16:43:14 -0800770 if (cmd.comp_channel >= 0) {
771 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
772 if (!ev_file) {
773 ret = -EINVAL;
774 goto err;
775 }
776 }
777
Roland Dreier9ead1902006-06-17 20:44:49 -0700778 obj->uverbs_file = file;
779 obj->comp_events_reported = 0;
780 obj->async_events_reported = 0;
781 INIT_LIST_HEAD(&obj->comp_list);
782 INIT_LIST_HEAD(&obj->async_list);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700783
784 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
Michael S. Tsirkinf4fd0b22007-05-03 13:48:47 +0300785 cmd.comp_vector,
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700786 file->ucontext, &udata);
787 if (IS_ERR(cq)) {
788 ret = PTR_ERR(cq);
Roland Dreier9ead1902006-06-17 20:44:49 -0700789 goto err_file;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700790 }
791
792 cq->device = file->device->ib_dev;
Roland Dreier9ead1902006-06-17 20:44:49 -0700793 cq->uobject = &obj->uobject;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700794 cq->comp_handler = ib_uverbs_comp_handler;
795 cq->event_handler = ib_uverbs_cq_event_handler;
Roland Dreier6b735972005-09-26 13:53:25 -0700796 cq->cq_context = ev_file;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700797 atomic_set(&cq->usecnt, 0);
798
Roland Dreier9ead1902006-06-17 20:44:49 -0700799 obj->uobject.object = cq;
800 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700801 if (ret)
Roland Dreier9ead1902006-06-17 20:44:49 -0700802 goto err_free;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700803
804 memset(&resp, 0, sizeof resp);
Roland Dreier9ead1902006-06-17 20:44:49 -0700805 resp.cq_handle = obj->uobject.id;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700806 resp.cqe = cq->cqe;
807
808 if (copy_to_user((void __user *) (unsigned long) cmd.response,
809 &resp, sizeof resp)) {
810 ret = -EFAULT;
Roland Dreier9ead1902006-06-17 20:44:49 -0700811 goto err_copy;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700812 }
813
Ingo Molnar95ed6442006-01-13 14:51:39 -0800814 mutex_lock(&file->mutex);
Roland Dreier9ead1902006-06-17 20:44:49 -0700815 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800816 mutex_unlock(&file->mutex);
Roland Dreiereb9d3cd2005-09-27 15:07:25 -0700817
Roland Dreier9ead1902006-06-17 20:44:49 -0700818 obj->uobject.live = 1;
819
820 up_write(&obj->uobject.mutex);
Roland Dreiereb9d3cd2005-09-27 15:07:25 -0700821
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700822 return in_len;
823
Roland Dreier9ead1902006-06-17 20:44:49 -0700824err_copy:
825 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700826
Roland Dreier9ead1902006-06-17 20:44:49 -0700827err_free:
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700828 ib_destroy_cq(cq);
829
Roland Dreier9ead1902006-06-17 20:44:49 -0700830err_file:
Jack Morgensteinac4e7b32006-01-06 16:43:14 -0800831 if (ev_file)
Roland Dreier9ead1902006-06-17 20:44:49 -0700832 ib_uverbs_release_ucq(file, ev_file, obj);
833
834err:
835 put_uobj_write(&obj->uobject);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700836 return ret;
837}
838
Roland Dreier33b9b3e2006-01-30 14:29:21 -0800839ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
840 const char __user *buf, int in_len,
841 int out_len)
842{
843 struct ib_uverbs_resize_cq cmd;
844 struct ib_uverbs_resize_cq_resp resp;
845 struct ib_udata udata;
846 struct ib_cq *cq;
847 int ret = -EINVAL;
848
849 if (copy_from_user(&cmd, buf, sizeof cmd))
850 return -EFAULT;
851
852 INIT_UDATA(&udata, buf + sizeof cmd,
853 (unsigned long) cmd.response + sizeof resp,
854 in_len - sizeof cmd, out_len - sizeof resp);
855
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700856 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
Roland Dreier9ead1902006-06-17 20:44:49 -0700857 if (!cq)
858 return -EINVAL;
Roland Dreier33b9b3e2006-01-30 14:29:21 -0800859
860 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
861 if (ret)
862 goto out;
863
Roland Dreier33b9b3e2006-01-30 14:29:21 -0800864 resp.cqe = cq->cqe;
865
866 if (copy_to_user((void __user *) (unsigned long) cmd.response,
Ralph Campbell64f817b2006-09-22 15:22:24 -0700867 &resp, sizeof resp.cqe))
Roland Dreier33b9b3e2006-01-30 14:29:21 -0800868 ret = -EFAULT;
869
870out:
Roland Dreier9ead1902006-06-17 20:44:49 -0700871 put_cq_read(cq);
Roland Dreier33b9b3e2006-01-30 14:29:21 -0800872
873 return ret ? ret : in_len;
874}
875
Roland Dreier67cdb402005-10-14 15:26:04 -0700876ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
877 const char __user *buf, int in_len,
878 int out_len)
879{
880 struct ib_uverbs_poll_cq cmd;
881 struct ib_uverbs_poll_cq_resp *resp;
882 struct ib_cq *cq;
883 struct ib_wc *wc;
884 int ret = 0;
885 int i;
886 int rsize;
887
888 if (copy_from_user(&cmd, buf, sizeof cmd))
889 return -EFAULT;
890
891 wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
892 if (!wc)
893 return -ENOMEM;
894
895 rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
896 resp = kmalloc(rsize, GFP_KERNEL);
897 if (!resp) {
898 ret = -ENOMEM;
899 goto out_wc;
900 }
901
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700902 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
Roland Dreierab108672006-09-22 15:17:19 -0700903 if (!cq) {
Roland Dreier67cdb402005-10-14 15:26:04 -0700904 ret = -EINVAL;
905 goto out;
906 }
907
908 resp->count = ib_poll_cq(cq, cmd.ne, wc);
909
Roland Dreierab108672006-09-22 15:17:19 -0700910 put_cq_read(cq);
Roland Dreier9ead1902006-06-17 20:44:49 -0700911
Roland Dreier67cdb402005-10-14 15:26:04 -0700912 for (i = 0; i < resp->count; i++) {
913 resp->wc[i].wr_id = wc[i].wr_id;
914 resp->wc[i].status = wc[i].status;
915 resp->wc[i].opcode = wc[i].opcode;
916 resp->wc[i].vendor_err = wc[i].vendor_err;
917 resp->wc[i].byte_len = wc[i].byte_len;
Jack Morgenstein77369ed2005-11-09 11:26:07 -0800918 resp->wc[i].imm_data = (__u32 __force) wc[i].imm_data;
Michael S. Tsirkin062dbb62006-12-31 21:09:42 +0200919 resp->wc[i].qp_num = wc[i].qp->qp_num;
Roland Dreier67cdb402005-10-14 15:26:04 -0700920 resp->wc[i].src_qp = wc[i].src_qp;
921 resp->wc[i].wc_flags = wc[i].wc_flags;
922 resp->wc[i].pkey_index = wc[i].pkey_index;
923 resp->wc[i].slid = wc[i].slid;
924 resp->wc[i].sl = wc[i].sl;
925 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
926 resp->wc[i].port_num = wc[i].port_num;
927 }
928
929 if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
930 ret = -EFAULT;
931
932out:
Roland Dreier67cdb402005-10-14 15:26:04 -0700933 kfree(resp);
934
935out_wc:
936 kfree(wc);
937 return ret ? ret : in_len;
938}
939
940ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
941 const char __user *buf, int in_len,
942 int out_len)
943{
944 struct ib_uverbs_req_notify_cq cmd;
945 struct ib_cq *cq;
Roland Dreier67cdb402005-10-14 15:26:04 -0700946
947 if (copy_from_user(&cmd, buf, sizeof cmd))
948 return -EFAULT;
949
Roland Dreier1ccf6aa2006-09-22 15:17:20 -0700950 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
Roland Dreierab108672006-09-22 15:17:19 -0700951 if (!cq)
Roland Dreier9ead1902006-06-17 20:44:49 -0700952 return -EINVAL;
Roland Dreier67cdb402005-10-14 15:26:04 -0700953
Roland Dreier9ead1902006-06-17 20:44:49 -0700954 ib_req_notify_cq(cq, cmd.solicited_only ?
955 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
956
Roland Dreierab108672006-09-22 15:17:19 -0700957 put_cq_read(cq);
Roland Dreier9ead1902006-06-17 20:44:49 -0700958
959 return in_len;
Roland Dreier67cdb402005-10-14 15:26:04 -0700960}
961
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700962ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
963 const char __user *buf, int in_len,
964 int out_len)
965{
Roland Dreier63aaf642005-09-09 15:55:08 -0700966 struct ib_uverbs_destroy_cq cmd;
967 struct ib_uverbs_destroy_cq_resp resp;
Roland Dreier9ead1902006-06-17 20:44:49 -0700968 struct ib_uobject *uobj;
Roland Dreier63aaf642005-09-09 15:55:08 -0700969 struct ib_cq *cq;
Roland Dreier9ead1902006-06-17 20:44:49 -0700970 struct ib_ucq_object *obj;
Roland Dreier6b735972005-09-26 13:53:25 -0700971 struct ib_uverbs_event_file *ev_file;
Roland Dreier63aaf642005-09-09 15:55:08 -0700972 int ret = -EINVAL;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700973
974 if (copy_from_user(&cmd, buf, sizeof cmd))
975 return -EFAULT;
976
Roland Dreier9ead1902006-06-17 20:44:49 -0700977 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
978 if (!uobj)
979 return -EINVAL;
980 cq = uobj->object;
981 ev_file = cq->cq_context;
982 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700983
984 ret = ib_destroy_cq(cq);
Roland Dreier9ead1902006-06-17 20:44:49 -0700985 if (!ret)
986 uobj->live = 0;
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700987
Roland Dreier9ead1902006-06-17 20:44:49 -0700988 put_uobj_write(uobj);
989
990 if (ret)
991 return ret;
992
993 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700994
Ingo Molnar95ed6442006-01-13 14:51:39 -0800995 mutex_lock(&file->mutex);
Roland Dreier9ead1902006-06-17 20:44:49 -0700996 list_del(&uobj->list);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800997 mutex_unlock(&file->mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -0700998
Roland Dreier9ead1902006-06-17 20:44:49 -0700999 ib_uverbs_release_ucq(file, ev_file, obj);
Roland Dreier63aaf642005-09-09 15:55:08 -07001000
Roland Dreier9ead1902006-06-17 20:44:49 -07001001 memset(&resp, 0, sizeof resp);
1002 resp.comp_events_reported = obj->comp_events_reported;
1003 resp.async_events_reported = obj->async_events_reported;
Roland Dreier63aaf642005-09-09 15:55:08 -07001004
Roland Dreier9ead1902006-06-17 20:44:49 -07001005 put_uobj(uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001006
Roland Dreier63aaf642005-09-09 15:55:08 -07001007 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1008 &resp, sizeof resp))
Roland Dreier9ead1902006-06-17 20:44:49 -07001009 return -EFAULT;
Roland Dreier63aaf642005-09-09 15:55:08 -07001010
Roland Dreier9ead1902006-06-17 20:44:49 -07001011 return in_len;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001012}
1013
1014ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1015 const char __user *buf, int in_len,
1016 int out_len)
1017{
1018 struct ib_uverbs_create_qp cmd;
1019 struct ib_uverbs_create_qp_resp resp;
1020 struct ib_udata udata;
Roland Dreier9ead1902006-06-17 20:44:49 -07001021 struct ib_uqp_object *obj;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001022 struct ib_pd *pd;
1023 struct ib_cq *scq, *rcq;
Roland Dreierf520ba52005-08-18 12:24:13 -07001024 struct ib_srq *srq;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001025 struct ib_qp *qp;
1026 struct ib_qp_init_attr attr;
1027 int ret;
1028
1029 if (out_len < sizeof resp)
1030 return -ENOSPC;
1031
1032 if (copy_from_user(&cmd, buf, sizeof cmd))
1033 return -EFAULT;
1034
1035 INIT_UDATA(&udata, buf + sizeof cmd,
1036 (unsigned long) cmd.response + sizeof resp,
1037 in_len - sizeof cmd, out_len - sizeof resp);
1038
Roland Dreier9ead1902006-06-17 20:44:49 -07001039 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1040 if (!obj)
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001041 return -ENOMEM;
1042
Roland Dreier43db2bc2006-07-23 15:16:04 -07001043 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
Roland Dreier9ead1902006-06-17 20:44:49 -07001044 down_write(&obj->uevent.uobject.mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001045
Roland Dreier43db2bc2006-07-23 15:16:04 -07001046 srq = cmd.is_srq ? idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
Roland Dreier9ead1902006-06-17 20:44:49 -07001047 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
Roland Dreier1ccf6aa2006-09-22 15:17:20 -07001048 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
Roland Dreier43db2bc2006-07-23 15:16:04 -07001049 rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
Roland Dreier1ccf6aa2006-09-22 15:17:20 -07001050 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001051
Roland Dreier9ead1902006-06-17 20:44:49 -07001052 if (!pd || !scq || !rcq || (cmd.is_srq && !srq)) {
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001053 ret = -EINVAL;
Roland Dreier9ead1902006-06-17 20:44:49 -07001054 goto err_put;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001055 }
1056
1057 attr.event_handler = ib_uverbs_qp_event_handler;
1058 attr.qp_context = file;
1059 attr.send_cq = scq;
1060 attr.recv_cq = rcq;
Roland Dreierf520ba52005-08-18 12:24:13 -07001061 attr.srq = srq;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001062 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1063 attr.qp_type = cmd.qp_type;
1064
1065 attr.cap.max_send_wr = cmd.max_send_wr;
1066 attr.cap.max_recv_wr = cmd.max_recv_wr;
1067 attr.cap.max_send_sge = cmd.max_send_sge;
1068 attr.cap.max_recv_sge = cmd.max_recv_sge;
1069 attr.cap.max_inline_data = cmd.max_inline_data;
1070
Roland Dreier9ead1902006-06-17 20:44:49 -07001071 obj->uevent.events_reported = 0;
1072 INIT_LIST_HEAD(&obj->uevent.event_list);
1073 INIT_LIST_HEAD(&obj->mcast_list);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001074
1075 qp = pd->device->create_qp(pd, &attr, &udata);
1076 if (IS_ERR(qp)) {
1077 ret = PTR_ERR(qp);
Roland Dreier9ead1902006-06-17 20:44:49 -07001078 goto err_put;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001079 }
1080
1081 qp->device = pd->device;
1082 qp->pd = pd;
1083 qp->send_cq = attr.send_cq;
1084 qp->recv_cq = attr.recv_cq;
1085 qp->srq = attr.srq;
Roland Dreier9ead1902006-06-17 20:44:49 -07001086 qp->uobject = &obj->uevent.uobject;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001087 qp->event_handler = attr.event_handler;
1088 qp->qp_context = attr.qp_context;
1089 qp->qp_type = attr.qp_type;
1090 atomic_inc(&pd->usecnt);
1091 atomic_inc(&attr.send_cq->usecnt);
1092 atomic_inc(&attr.recv_cq->usecnt);
1093 if (attr.srq)
1094 atomic_inc(&attr.srq->usecnt);
1095
Roland Dreier9ead1902006-06-17 20:44:49 -07001096 obj->uevent.uobject.object = qp;
1097 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001098 if (ret)
1099 goto err_destroy;
1100
Roland Dreier9ead1902006-06-17 20:44:49 -07001101 memset(&resp, 0, sizeof resp);
1102 resp.qpn = qp->qp_num;
1103 resp.qp_handle = obj->uevent.uobject.id;
Jack Morgenstein77369ed2005-11-09 11:26:07 -08001104 resp.max_recv_sge = attr.cap.max_recv_sge;
1105 resp.max_send_sge = attr.cap.max_send_sge;
1106 resp.max_recv_wr = attr.cap.max_recv_wr;
1107 resp.max_send_wr = attr.cap.max_send_wr;
1108 resp.max_inline_data = attr.cap.max_inline_data;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001109
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001110 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1111 &resp, sizeof resp)) {
1112 ret = -EFAULT;
Roland Dreier9ead1902006-06-17 20:44:49 -07001113 goto err_copy;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001114 }
1115
Roland Dreier9ead1902006-06-17 20:44:49 -07001116 put_pd_read(pd);
1117 put_cq_read(scq);
Roland Dreier43db2bc2006-07-23 15:16:04 -07001118 if (rcq != scq)
1119 put_cq_read(rcq);
Roland Dreier9ead1902006-06-17 20:44:49 -07001120 if (srq)
1121 put_srq_read(srq);
1122
Ingo Molnar95ed6442006-01-13 14:51:39 -08001123 mutex_lock(&file->mutex);
Roland Dreier9ead1902006-06-17 20:44:49 -07001124 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
Ingo Molnar95ed6442006-01-13 14:51:39 -08001125 mutex_unlock(&file->mutex);
Roland Dreiereb9d3cd2005-09-27 15:07:25 -07001126
Roland Dreier9ead1902006-06-17 20:44:49 -07001127 obj->uevent.uobject.live = 1;
1128
1129 up_write(&obj->uevent.uobject.mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001130
1131 return in_len;
1132
Roland Dreier9ead1902006-06-17 20:44:49 -07001133err_copy:
1134 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001135
1136err_destroy:
1137 ib_destroy_qp(qp);
1138
Roland Dreier9ead1902006-06-17 20:44:49 -07001139err_put:
1140 if (pd)
1141 put_pd_read(pd);
1142 if (scq)
1143 put_cq_read(scq);
Roland Dreier43db2bc2006-07-23 15:16:04 -07001144 if (rcq && rcq != scq)
Roland Dreier9ead1902006-06-17 20:44:49 -07001145 put_cq_read(rcq);
1146 if (srq)
1147 put_srq_read(srq);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001148
Roland Dreier9ead1902006-06-17 20:44:49 -07001149 put_uobj_write(&obj->uevent.uobject);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001150 return ret;
1151}
1152
Dotan Barak7ccc9a22006-02-13 16:31:25 -08001153ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1154 const char __user *buf, int in_len,
1155 int out_len)
1156{
1157 struct ib_uverbs_query_qp cmd;
1158 struct ib_uverbs_query_qp_resp resp;
1159 struct ib_qp *qp;
1160 struct ib_qp_attr *attr;
1161 struct ib_qp_init_attr *init_attr;
1162 int ret;
1163
1164 if (copy_from_user(&cmd, buf, sizeof cmd))
1165 return -EFAULT;
1166
1167 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1168 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1169 if (!attr || !init_attr) {
1170 ret = -ENOMEM;
1171 goto out;
1172 }
1173
Roland Dreier9ead1902006-06-17 20:44:49 -07001174 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1175 if (!qp) {
Dotan Barak7ccc9a22006-02-13 16:31:25 -08001176 ret = -EINVAL;
Roland Dreier9ead1902006-06-17 20:44:49 -07001177 goto out;
1178 }
Dotan Barak7ccc9a22006-02-13 16:31:25 -08001179
Roland Dreier9ead1902006-06-17 20:44:49 -07001180 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1181
1182 put_qp_read(qp);
Dotan Barak7ccc9a22006-02-13 16:31:25 -08001183
1184 if (ret)
1185 goto out;
1186
1187 memset(&resp, 0, sizeof resp);
1188
1189 resp.qp_state = attr->qp_state;
1190 resp.cur_qp_state = attr->cur_qp_state;
1191 resp.path_mtu = attr->path_mtu;
1192 resp.path_mig_state = attr->path_mig_state;
1193 resp.qkey = attr->qkey;
1194 resp.rq_psn = attr->rq_psn;
1195 resp.sq_psn = attr->sq_psn;
1196 resp.dest_qp_num = attr->dest_qp_num;
1197 resp.qp_access_flags = attr->qp_access_flags;
1198 resp.pkey_index = attr->pkey_index;
1199 resp.alt_pkey_index = attr->alt_pkey_index;
Jack Morgenstein0b26c882006-10-25 12:54:20 +02001200 resp.sq_draining = attr->sq_draining;
Dotan Barak7ccc9a22006-02-13 16:31:25 -08001201 resp.max_rd_atomic = attr->max_rd_atomic;
1202 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1203 resp.min_rnr_timer = attr->min_rnr_timer;
1204 resp.port_num = attr->port_num;
1205 resp.timeout = attr->timeout;
1206 resp.retry_cnt = attr->retry_cnt;
1207 resp.rnr_retry = attr->rnr_retry;
1208 resp.alt_port_num = attr->alt_port_num;
1209 resp.alt_timeout = attr->alt_timeout;
1210
1211 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1212 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1213 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1214 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1215 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1216 resp.dest.dlid = attr->ah_attr.dlid;
1217 resp.dest.sl = attr->ah_attr.sl;
1218 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1219 resp.dest.static_rate = attr->ah_attr.static_rate;
1220 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1221 resp.dest.port_num = attr->ah_attr.port_num;
1222
1223 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1224 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1225 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1226 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1227 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1228 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1229 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1230 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1231 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1232 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1233 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1234
1235 resp.max_send_wr = init_attr->cap.max_send_wr;
1236 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1237 resp.max_send_sge = init_attr->cap.max_send_sge;
1238 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1239 resp.max_inline_data = init_attr->cap.max_inline_data;
Dotan Barak27d56302006-03-02 11:25:27 -08001240 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
Dotan Barak7ccc9a22006-02-13 16:31:25 -08001241
1242 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1243 &resp, sizeof resp))
1244 ret = -EFAULT;
1245
1246out:
1247 kfree(attr);
1248 kfree(init_attr);
1249
1250 return ret ? ret : in_len;
1251}
1252
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001253ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1254 const char __user *buf, int in_len,
1255 int out_len)
1256{
1257 struct ib_uverbs_modify_qp cmd;
Ralph Campbell9bc57e22006-08-11 14:58:09 -07001258 struct ib_udata udata;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001259 struct ib_qp *qp;
1260 struct ib_qp_attr *attr;
1261 int ret;
1262
1263 if (copy_from_user(&cmd, buf, sizeof cmd))
1264 return -EFAULT;
1265
Ralph Campbell9bc57e22006-08-11 14:58:09 -07001266 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1267 out_len);
1268
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001269 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1270 if (!attr)
1271 return -ENOMEM;
1272
Roland Dreier9ead1902006-06-17 20:44:49 -07001273 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1274 if (!qp) {
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001275 ret = -EINVAL;
1276 goto out;
1277 }
1278
1279 attr->qp_state = cmd.qp_state;
1280 attr->cur_qp_state = cmd.cur_qp_state;
1281 attr->path_mtu = cmd.path_mtu;
1282 attr->path_mig_state = cmd.path_mig_state;
1283 attr->qkey = cmd.qkey;
1284 attr->rq_psn = cmd.rq_psn;
1285 attr->sq_psn = cmd.sq_psn;
1286 attr->dest_qp_num = cmd.dest_qp_num;
1287 attr->qp_access_flags = cmd.qp_access_flags;
1288 attr->pkey_index = cmd.pkey_index;
Ami Perlmutter702b2aa2006-03-20 10:08:24 -08001289 attr->alt_pkey_index = cmd.alt_pkey_index;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001290 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1291 attr->max_rd_atomic = cmd.max_rd_atomic;
1292 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1293 attr->min_rnr_timer = cmd.min_rnr_timer;
1294 attr->port_num = cmd.port_num;
1295 attr->timeout = cmd.timeout;
1296 attr->retry_cnt = cmd.retry_cnt;
1297 attr->rnr_retry = cmd.rnr_retry;
1298 attr->alt_port_num = cmd.alt_port_num;
1299 attr->alt_timeout = cmd.alt_timeout;
1300
1301 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1302 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1303 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1304 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1305 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1306 attr->ah_attr.dlid = cmd.dest.dlid;
1307 attr->ah_attr.sl = cmd.dest.sl;
1308 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1309 attr->ah_attr.static_rate = cmd.dest.static_rate;
1310 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1311 attr->ah_attr.port_num = cmd.dest.port_num;
1312
1313 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1314 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1315 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1316 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1317 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1318 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1319 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1320 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1321 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1322 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1323 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1324
Ralph Campbell9bc57e22006-08-11 14:58:09 -07001325 ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
Roland Dreier9ead1902006-06-17 20:44:49 -07001326
1327 put_qp_read(qp);
1328
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001329 if (ret)
1330 goto out;
1331
1332 ret = in_len;
1333
1334out:
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001335 kfree(attr);
1336
1337 return ret;
1338}
1339
1340ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1341 const char __user *buf, int in_len,
1342 int out_len)
1343{
Roland Dreier63aaf642005-09-09 15:55:08 -07001344 struct ib_uverbs_destroy_qp cmd;
1345 struct ib_uverbs_destroy_qp_resp resp;
Roland Dreier9ead1902006-06-17 20:44:49 -07001346 struct ib_uobject *uobj;
Roland Dreier63aaf642005-09-09 15:55:08 -07001347 struct ib_qp *qp;
Roland Dreier9ead1902006-06-17 20:44:49 -07001348 struct ib_uqp_object *obj;
Roland Dreier63aaf642005-09-09 15:55:08 -07001349 int ret = -EINVAL;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001350
1351 if (copy_from_user(&cmd, buf, sizeof cmd))
1352 return -EFAULT;
1353
Roland Dreier63aaf642005-09-09 15:55:08 -07001354 memset(&resp, 0, sizeof resp);
1355
Roland Dreier9ead1902006-06-17 20:44:49 -07001356 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1357 if (!uobj)
1358 return -EINVAL;
1359 qp = uobj->object;
1360 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001361
Roland Dreier9ead1902006-06-17 20:44:49 -07001362 if (!list_empty(&obj->mcast_list)) {
1363 put_uobj_write(uobj);
1364 return -EBUSY;
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001365 }
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001366
1367 ret = ib_destroy_qp(qp);
Roland Dreier9ead1902006-06-17 20:44:49 -07001368 if (!ret)
1369 uobj->live = 0;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001370
Roland Dreier9ead1902006-06-17 20:44:49 -07001371 put_uobj_write(uobj);
1372
1373 if (ret)
1374 return ret;
1375
1376 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001377
Ingo Molnar95ed6442006-01-13 14:51:39 -08001378 mutex_lock(&file->mutex);
Roland Dreier9ead1902006-06-17 20:44:49 -07001379 list_del(&uobj->list);
Ingo Molnar95ed6442006-01-13 14:51:39 -08001380 mutex_unlock(&file->mutex);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001381
Roland Dreier9ead1902006-06-17 20:44:49 -07001382 ib_uverbs_release_uevent(file, &obj->uevent);
Roland Dreier63aaf642005-09-09 15:55:08 -07001383
Roland Dreier9ead1902006-06-17 20:44:49 -07001384 resp.events_reported = obj->uevent.events_reported;
Roland Dreier63aaf642005-09-09 15:55:08 -07001385
Roland Dreier9ead1902006-06-17 20:44:49 -07001386 put_uobj(uobj);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001387
Roland Dreier63aaf642005-09-09 15:55:08 -07001388 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1389 &resp, sizeof resp))
Roland Dreier9ead1902006-06-17 20:44:49 -07001390 return -EFAULT;
Roland Dreier63aaf642005-09-09 15:55:08 -07001391
Roland Dreier9ead1902006-06-17 20:44:49 -07001392 return in_len;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001393}
1394
Roland Dreier67cdb402005-10-14 15:26:04 -07001395ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
Roland Dreiera74cd4a2006-02-13 16:30:49 -08001396 const char __user *buf, int in_len,
1397 int out_len)
Roland Dreier67cdb402005-10-14 15:26:04 -07001398{
1399 struct ib_uverbs_post_send cmd;
1400 struct ib_uverbs_post_send_resp resp;
1401 struct ib_uverbs_send_wr *user_wr;
1402 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1403 struct ib_qp *qp;
1404 int i, sg_ind;
Roland Dreier9ead1902006-06-17 20:44:49 -07001405 int is_ud;
Roland Dreier67cdb402005-10-14 15:26:04 -07001406 ssize_t ret = -EINVAL;
1407
1408 if (copy_from_user(&cmd, buf, sizeof cmd))
1409 return -EFAULT;
1410
1411 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1412 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1413 return -EINVAL;
1414
1415 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1416 return -EINVAL;
1417
1418 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1419 if (!user_wr)
1420 return -ENOMEM;
1421
Roland Dreier9ead1902006-06-17 20:44:49 -07001422 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1423 if (!qp)
Roland Dreier67cdb402005-10-14 15:26:04 -07001424 goto out;
1425
Roland Dreier9ead1902006-06-17 20:44:49 -07001426 is_ud = qp->qp_type == IB_QPT_UD;
Roland Dreier67cdb402005-10-14 15:26:04 -07001427 sg_ind = 0;
1428 last = NULL;
1429 for (i = 0; i < cmd.wr_count; ++i) {
1430 if (copy_from_user(user_wr,
1431 buf + sizeof cmd + i * cmd.wqe_size,
1432 cmd.wqe_size)) {
1433 ret = -EFAULT;
Roland Dreier9ead1902006-06-17 20:44:49 -07001434 goto out_put;
Roland Dreier67cdb402005-10-14 15:26:04 -07001435 }
1436
1437 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1438 ret = -EINVAL;
Roland Dreier9ead1902006-06-17 20:44:49 -07001439 goto out_put;
Roland Dreier67cdb402005-10-14 15:26:04 -07001440 }
1441
1442 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1443 user_wr->num_sge * sizeof (struct ib_sge),
1444 GFP_KERNEL);
1445 if (!next) {
1446 ret = -ENOMEM;
Roland Dreier9ead1902006-06-17 20:44:49 -07001447 goto out_put;
Roland Dreier67cdb402005-10-14 15:26:04 -07001448 }
1449
1450 if (!last)
1451 wr = next;
1452 else
1453 last->next = next;
1454 last = next;
1455
1456 next->next = NULL;
1457 next->wr_id = user_wr->wr_id;
1458 next->num_sge = user_wr->num_sge;
1459 next->opcode = user_wr->opcode;
1460 next->send_flags = user_wr->send_flags;
Jack Morgenstein77369ed2005-11-09 11:26:07 -08001461 next->imm_data = (__be32 __force) user_wr->imm_data;
Roland Dreier67cdb402005-10-14 15:26:04 -07001462
Roland Dreier9ead1902006-06-17 20:44:49 -07001463 if (is_ud) {
1464 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1465 file->ucontext);
Roland Dreier67cdb402005-10-14 15:26:04 -07001466 if (!next->wr.ud.ah) {
1467 ret = -EINVAL;
Roland Dreier9ead1902006-06-17 20:44:49 -07001468 goto out_put;
Roland Dreier67cdb402005-10-14 15:26:04 -07001469 }
1470 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1471 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1472 } else {
1473 switch (next->opcode) {
1474 case IB_WR_RDMA_WRITE:
1475 case IB_WR_RDMA_WRITE_WITH_IMM:
1476 case IB_WR_RDMA_READ:
1477 next->wr.rdma.remote_addr =
1478 user_wr->wr.rdma.remote_addr;
1479 next->wr.rdma.rkey =
1480 user_wr->wr.rdma.rkey;
1481 break;
1482 case IB_WR_ATOMIC_CMP_AND_SWP:
1483 case IB_WR_ATOMIC_FETCH_AND_ADD:
1484 next->wr.atomic.remote_addr =
1485 user_wr->wr.atomic.remote_addr;
1486 next->wr.atomic.compare_add =
1487 user_wr->wr.atomic.compare_add;
1488 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1489 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1490 break;
1491 default:
1492 break;
1493 }
1494 }
1495
1496 if (next->num_sge) {
1497 next->sg_list = (void *) next +
1498 ALIGN(sizeof *next, sizeof (struct ib_sge));
1499 if (copy_from_user(next->sg_list,
1500 buf + sizeof cmd +
1501 cmd.wr_count * cmd.wqe_size +
1502 sg_ind * sizeof (struct ib_sge),
1503 next->num_sge * sizeof (struct ib_sge))) {
1504 ret = -EFAULT;
Roland Dreier9ead1902006-06-17 20:44:49 -07001505 goto out_put;
Roland Dreier67cdb402005-10-14 15:26:04 -07001506 }
1507 sg_ind += next->num_sge;
1508 } else
1509 next->sg_list = NULL;
1510 }
1511
1512 resp.bad_wr = 0;
1513 ret = qp->device->post_send(qp, wr, &bad_wr);
1514 if (ret)
1515 for (next = wr; next; next = next->next) {
1516 ++resp.bad_wr;
1517 if (next == bad_wr)
1518 break;
1519 }
1520
1521 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1522 &resp, sizeof resp))
1523 ret = -EFAULT;
1524
Roland Dreier9ead1902006-06-17 20:44:49 -07001525out_put:
1526 put_qp_read(qp);
Roland Dreier67cdb402005-10-14 15:26:04 -07001527
1528 while (wr) {
Roland Dreier9ead1902006-06-17 20:44:49 -07001529 if (is_ud && wr->wr.ud.ah)
1530 put_ah_read(wr->wr.ud.ah);
Roland Dreier67cdb402005-10-14 15:26:04 -07001531 next = wr->next;
1532 kfree(wr);
1533 wr = next;
1534 }
1535
Krishna Kumar18320822006-06-22 07:47:27 -07001536out:
Roland Dreier67cdb402005-10-14 15:26:04 -07001537 kfree(user_wr);
1538
1539 return ret ? ret : in_len;
1540}
1541
1542static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1543 int in_len,
1544 u32 wr_count,
1545 u32 sge_count,
1546 u32 wqe_size)
1547{
1548 struct ib_uverbs_recv_wr *user_wr;
1549 struct ib_recv_wr *wr = NULL, *last, *next;
1550 int sg_ind;
1551 int i;
1552 int ret;
1553
1554 if (in_len < wqe_size * wr_count +
1555 sge_count * sizeof (struct ib_uverbs_sge))
1556 return ERR_PTR(-EINVAL);
1557
1558 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1559 return ERR_PTR(-EINVAL);
1560
1561 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1562 if (!user_wr)
1563 return ERR_PTR(-ENOMEM);
1564
1565 sg_ind = 0;
1566 last = NULL;
1567 for (i = 0; i < wr_count; ++i) {
1568 if (copy_from_user(user_wr, buf + i * wqe_size,
1569 wqe_size)) {
1570 ret = -EFAULT;
1571 goto err;
1572 }
1573
1574 if (user_wr->num_sge + sg_ind > sge_count) {
1575 ret = -EINVAL;
1576 goto err;
1577 }
1578
1579 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1580 user_wr->num_sge * sizeof (struct ib_sge),
1581 GFP_KERNEL);
1582 if (!next) {
1583 ret = -ENOMEM;
1584 goto err;
1585 }
1586
1587 if (!last)
1588 wr = next;
1589 else
1590 last->next = next;
1591 last = next;
1592
1593 next->next = NULL;
1594 next->wr_id = user_wr->wr_id;
1595 next->num_sge = user_wr->num_sge;
1596
1597 if (next->num_sge) {
1598 next->sg_list = (void *) next +
1599 ALIGN(sizeof *next, sizeof (struct ib_sge));
1600 if (copy_from_user(next->sg_list,
1601 buf + wr_count * wqe_size +
1602 sg_ind * sizeof (struct ib_sge),
1603 next->num_sge * sizeof (struct ib_sge))) {
1604 ret = -EFAULT;
1605 goto err;
1606 }
1607 sg_ind += next->num_sge;
1608 } else
1609 next->sg_list = NULL;
1610 }
1611
1612 kfree(user_wr);
1613 return wr;
1614
1615err:
1616 kfree(user_wr);
1617
1618 while (wr) {
1619 next = wr->next;
1620 kfree(wr);
1621 wr = next;
1622 }
1623
1624 return ERR_PTR(ret);
1625}
1626
1627ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
Roland Dreiera74cd4a2006-02-13 16:30:49 -08001628 const char __user *buf, int in_len,
1629 int out_len)
Roland Dreier67cdb402005-10-14 15:26:04 -07001630{
1631 struct ib_uverbs_post_recv cmd;
1632 struct ib_uverbs_post_recv_resp resp;
1633 struct ib_recv_wr *wr, *next, *bad_wr;
1634 struct ib_qp *qp;
1635 ssize_t ret = -EINVAL;
1636
1637 if (copy_from_user(&cmd, buf, sizeof cmd))
1638 return -EFAULT;
1639
1640 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1641 in_len - sizeof cmd, cmd.wr_count,
1642 cmd.sge_count, cmd.wqe_size);
1643 if (IS_ERR(wr))
1644 return PTR_ERR(wr);
1645
Roland Dreier9ead1902006-06-17 20:44:49 -07001646 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1647 if (!qp)
Roland Dreier67cdb402005-10-14 15:26:04 -07001648 goto out;
1649
1650 resp.bad_wr = 0;
1651 ret = qp->device->post_recv(qp, wr, &bad_wr);
Roland Dreier9ead1902006-06-17 20:44:49 -07001652
1653 put_qp_read(qp);
1654
Roland Dreier67cdb402005-10-14 15:26:04 -07001655 if (ret)
1656 for (next = wr; next; next = next->next) {
1657 ++resp.bad_wr;
1658 if (next == bad_wr)
1659 break;
1660 }
1661
Roland Dreier67cdb402005-10-14 15:26:04 -07001662 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1663 &resp, sizeof resp))
1664 ret = -EFAULT;
1665
1666out:
Roland Dreier67cdb402005-10-14 15:26:04 -07001667 while (wr) {
1668 next = wr->next;
1669 kfree(wr);
1670 wr = next;
1671 }
1672
1673 return ret ? ret : in_len;
1674}
1675
1676ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
Roland Dreiera74cd4a2006-02-13 16:30:49 -08001677 const char __user *buf, int in_len,
1678 int out_len)
Roland Dreier67cdb402005-10-14 15:26:04 -07001679{
1680 struct ib_uverbs_post_srq_recv cmd;
1681 struct ib_uverbs_post_srq_recv_resp resp;
1682 struct ib_recv_wr *wr, *next, *bad_wr;
1683 struct ib_srq *srq;
1684 ssize_t ret = -EINVAL;
1685
1686 if (copy_from_user(&cmd, buf, sizeof cmd))
1687 return -EFAULT;
1688
1689 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1690 in_len - sizeof cmd, cmd.wr_count,
1691 cmd.sge_count, cmd.wqe_size);
1692 if (IS_ERR(wr))
1693 return PTR_ERR(wr);
1694
Roland Dreier9ead1902006-06-17 20:44:49 -07001695 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1696 if (!srq)
Roland Dreier67cdb402005-10-14 15:26:04 -07001697 goto out;
1698
1699 resp.bad_wr = 0;
1700 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
Roland Dreier9ead1902006-06-17 20:44:49 -07001701
1702 put_srq_read(srq);
1703
Roland Dreier67cdb402005-10-14 15:26:04 -07001704 if (ret)
1705 for (next = wr; next; next = next->next) {
1706 ++resp.bad_wr;
1707 if (next == bad_wr)
1708 break;
1709 }
1710
Roland Dreier67cdb402005-10-14 15:26:04 -07001711 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1712 &resp, sizeof resp))
1713 ret = -EFAULT;
1714
1715out:
Roland Dreier67cdb402005-10-14 15:26:04 -07001716 while (wr) {
1717 next = wr->next;
1718 kfree(wr);
1719 wr = next;
1720 }
1721
1722 return ret ? ret : in_len;
1723}
1724
1725ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1726 const char __user *buf, int in_len,
1727 int out_len)
1728{
1729 struct ib_uverbs_create_ah cmd;
1730 struct ib_uverbs_create_ah_resp resp;
1731 struct ib_uobject *uobj;
1732 struct ib_pd *pd;
1733 struct ib_ah *ah;
1734 struct ib_ah_attr attr;
1735 int ret;
1736
1737 if (out_len < sizeof resp)
1738 return -ENOSPC;
1739
1740 if (copy_from_user(&cmd, buf, sizeof cmd))
1741 return -EFAULT;
1742
1743 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1744 if (!uobj)
1745 return -ENOMEM;
1746
Roland Dreier43db2bc2006-07-23 15:16:04 -07001747 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
Roland Dreier9ead1902006-06-17 20:44:49 -07001748 down_write(&uobj->mutex);
Roland Dreier67cdb402005-10-14 15:26:04 -07001749
Roland Dreier9ead1902006-06-17 20:44:49 -07001750 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1751 if (!pd) {
Roland Dreier67cdb402005-10-14 15:26:04 -07001752 ret = -EINVAL;
Roland Dreier9ead1902006-06-17 20:44:49 -07001753 goto err;
Roland Dreier67cdb402005-10-14 15:26:04 -07001754 }
1755
Roland Dreier67cdb402005-10-14 15:26:04 -07001756 attr.dlid = cmd.attr.dlid;
1757 attr.sl = cmd.attr.sl;
1758 attr.src_path_bits = cmd.attr.src_path_bits;
1759 attr.static_rate = cmd.attr.static_rate;
Ralph Campbellea5d4a62006-01-06 16:24:45 -08001760 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
Roland Dreier67cdb402005-10-14 15:26:04 -07001761 attr.port_num = cmd.attr.port_num;
1762 attr.grh.flow_label = cmd.attr.grh.flow_label;
1763 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1764 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1765 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1766 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1767
1768 ah = ib_create_ah(pd, &attr);
1769 if (IS_ERR(ah)) {
1770 ret = PTR_ERR(ah);
Michael S. Tsirkinec924b42006-07-17 18:20:51 +03001771 goto err_put;
Roland Dreier67cdb402005-10-14 15:26:04 -07001772 }
1773
Roland Dreier9ead1902006-06-17 20:44:49 -07001774 ah->uobject = uobj;
1775 uobj->object = ah;
Roland Dreier67cdb402005-10-14 15:26:04 -07001776
Roland Dreier9ead1902006-06-17 20:44:49 -07001777 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
Roland Dreier67cdb402005-10-14 15:26:04 -07001778 if (ret)
1779 goto err_destroy;
1780
1781 resp.ah_handle = uobj->id;
1782
1783 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1784 &resp, sizeof resp)) {
1785 ret = -EFAULT;
Roland Dreier9ead1902006-06-17 20:44:49 -07001786 goto err_copy;
Roland Dreier67cdb402005-10-14 15:26:04 -07001787 }
1788
Roland Dreier9ead1902006-06-17 20:44:49 -07001789 put_pd_read(pd);
1790
Ingo Molnar95ed6442006-01-13 14:51:39 -08001791 mutex_lock(&file->mutex);
Roland Dreier67cdb402005-10-14 15:26:04 -07001792 list_add_tail(&uobj->list, &file->ucontext->ah_list);
Ingo Molnar95ed6442006-01-13 14:51:39 -08001793 mutex_unlock(&file->mutex);
Roland Dreier67cdb402005-10-14 15:26:04 -07001794
Roland Dreier9ead1902006-06-17 20:44:49 -07001795 uobj->live = 1;
1796
1797 up_write(&uobj->mutex);
Roland Dreier67cdb402005-10-14 15:26:04 -07001798
1799 return in_len;
1800
Roland Dreier9ead1902006-06-17 20:44:49 -07001801err_copy:
1802 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
Roland Dreier67cdb402005-10-14 15:26:04 -07001803
1804err_destroy:
1805 ib_destroy_ah(ah);
1806
Michael S. Tsirkinec924b42006-07-17 18:20:51 +03001807err_put:
1808 put_pd_read(pd);
1809
Roland Dreier9ead1902006-06-17 20:44:49 -07001810err:
1811 put_uobj_write(uobj);
Roland Dreier67cdb402005-10-14 15:26:04 -07001812 return ret;
1813}
1814
1815ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1816 const char __user *buf, int in_len, int out_len)
1817{
1818 struct ib_uverbs_destroy_ah cmd;
1819 struct ib_ah *ah;
1820 struct ib_uobject *uobj;
Roland Dreier9ead1902006-06-17 20:44:49 -07001821 int ret;
Roland Dreier67cdb402005-10-14 15:26:04 -07001822
1823 if (copy_from_user(&cmd, buf, sizeof cmd))
1824 return -EFAULT;
1825
Roland Dreier9ead1902006-06-17 20:44:49 -07001826 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1827 if (!uobj)
1828 return -EINVAL;
1829 ah = uobj->object;
Roland Dreier67cdb402005-10-14 15:26:04 -07001830
1831 ret = ib_destroy_ah(ah);
Roland Dreier9ead1902006-06-17 20:44:49 -07001832 if (!ret)
1833 uobj->live = 0;
Roland Dreier67cdb402005-10-14 15:26:04 -07001834
Roland Dreier9ead1902006-06-17 20:44:49 -07001835 put_uobj_write(uobj);
1836
1837 if (ret)
1838 return ret;
1839
1840 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
Roland Dreier67cdb402005-10-14 15:26:04 -07001841
Ingo Molnar95ed6442006-01-13 14:51:39 -08001842 mutex_lock(&file->mutex);
Roland Dreier67cdb402005-10-14 15:26:04 -07001843 list_del(&uobj->list);
Ingo Molnar95ed6442006-01-13 14:51:39 -08001844 mutex_unlock(&file->mutex);
Roland Dreier67cdb402005-10-14 15:26:04 -07001845
Roland Dreier9ead1902006-06-17 20:44:49 -07001846 put_uobj(uobj);
Roland Dreier67cdb402005-10-14 15:26:04 -07001847
Roland Dreier9ead1902006-06-17 20:44:49 -07001848 return in_len;
Roland Dreier67cdb402005-10-14 15:26:04 -07001849}
1850
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001851ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1852 const char __user *buf, int in_len,
1853 int out_len)
1854{
1855 struct ib_uverbs_attach_mcast cmd;
1856 struct ib_qp *qp;
Roland Dreier9ead1902006-06-17 20:44:49 -07001857 struct ib_uqp_object *obj;
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001858 struct ib_uverbs_mcast_entry *mcast;
Roland Dreier9ead1902006-06-17 20:44:49 -07001859 int ret;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001860
1861 if (copy_from_user(&cmd, buf, sizeof cmd))
1862 return -EFAULT;
1863
Roland Dreier9ead1902006-06-17 20:44:49 -07001864 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1865 if (!qp)
1866 return -EINVAL;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001867
Roland Dreier9ead1902006-06-17 20:44:49 -07001868 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001869
Roland Dreier9ead1902006-06-17 20:44:49 -07001870 list_for_each_entry(mcast, &obj->mcast_list, list)
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001871 if (cmd.mlid == mcast->lid &&
1872 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1873 ret = 0;
Roland Dreier9ead1902006-06-17 20:44:49 -07001874 goto out_put;
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001875 }
1876
1877 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1878 if (!mcast) {
1879 ret = -ENOMEM;
Roland Dreier9ead1902006-06-17 20:44:49 -07001880 goto out_put;
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001881 }
1882
1883 mcast->lid = cmd.mlid;
1884 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1885
1886 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
Roland Dreier9ead1902006-06-17 20:44:49 -07001887 if (!ret)
1888 list_add_tail(&mcast->list, &obj->mcast_list);
1889 else
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001890 kfree(mcast);
1891
Roland Dreier9ead1902006-06-17 20:44:49 -07001892out_put:
1893 put_qp_read(qp);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001894
1895 return ret ? ret : in_len;
1896}
1897
1898ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1899 const char __user *buf, int in_len,
1900 int out_len)
1901{
1902 struct ib_uverbs_detach_mcast cmd;
Roland Dreier9ead1902006-06-17 20:44:49 -07001903 struct ib_uqp_object *obj;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001904 struct ib_qp *qp;
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001905 struct ib_uverbs_mcast_entry *mcast;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001906 int ret = -EINVAL;
1907
1908 if (copy_from_user(&cmd, buf, sizeof cmd))
1909 return -EFAULT;
1910
Roland Dreier9ead1902006-06-17 20:44:49 -07001911 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1912 if (!qp)
1913 return -EINVAL;
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001914
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001915 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1916 if (ret)
Roland Dreier9ead1902006-06-17 20:44:49 -07001917 goto out_put;
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001918
Roland Dreier9ead1902006-06-17 20:44:49 -07001919 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001920
Roland Dreier9ead1902006-06-17 20:44:49 -07001921 list_for_each_entry(mcast, &obj->mcast_list, list)
Jack Morgensteinf4e40152005-11-29 16:57:01 -08001922 if (cmd.mlid == mcast->lid &&
1923 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1924 list_del(&mcast->list);
1925 kfree(mcast);
1926 break;
1927 }
1928
Roland Dreier9ead1902006-06-17 20:44:49 -07001929out_put:
1930 put_qp_read(qp);
Roland Dreierbc38a6a2005-07-07 17:57:13 -07001931
1932 return ret ? ret : in_len;
1933}
Roland Dreierf520ba52005-08-18 12:24:13 -07001934
1935ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1936 const char __user *buf, int in_len,
1937 int out_len)
1938{
1939 struct ib_uverbs_create_srq cmd;
1940 struct ib_uverbs_create_srq_resp resp;
1941 struct ib_udata udata;
Roland Dreier9ead1902006-06-17 20:44:49 -07001942 struct ib_uevent_object *obj;
Roland Dreierf520ba52005-08-18 12:24:13 -07001943 struct ib_pd *pd;
1944 struct ib_srq *srq;
1945 struct ib_srq_init_attr attr;
1946 int ret;
1947
1948 if (out_len < sizeof resp)
1949 return -ENOSPC;
1950
1951 if (copy_from_user(&cmd, buf, sizeof cmd))
1952 return -EFAULT;
1953
1954 INIT_UDATA(&udata, buf + sizeof cmd,
1955 (unsigned long) cmd.response + sizeof resp,
1956 in_len - sizeof cmd, out_len - sizeof resp);
1957
Roland Dreier9ead1902006-06-17 20:44:49 -07001958 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1959 if (!obj)
Roland Dreierf520ba52005-08-18 12:24:13 -07001960 return -ENOMEM;
1961
Roland Dreier43db2bc2006-07-23 15:16:04 -07001962 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
Roland Dreier9ead1902006-06-17 20:44:49 -07001963 down_write(&obj->uobject.mutex);
Roland Dreierf520ba52005-08-18 12:24:13 -07001964
Roland Dreier9ead1902006-06-17 20:44:49 -07001965 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1966 if (!pd) {
Roland Dreierf520ba52005-08-18 12:24:13 -07001967 ret = -EINVAL;
Roland Dreier9ead1902006-06-17 20:44:49 -07001968 goto err;
Roland Dreierf520ba52005-08-18 12:24:13 -07001969 }
1970
1971 attr.event_handler = ib_uverbs_srq_event_handler;
1972 attr.srq_context = file;
1973 attr.attr.max_wr = cmd.max_wr;
1974 attr.attr.max_sge = cmd.max_sge;
1975 attr.attr.srq_limit = cmd.srq_limit;
1976
Roland Dreier9ead1902006-06-17 20:44:49 -07001977 obj->events_reported = 0;
1978 INIT_LIST_HEAD(&obj->event_list);
Roland Dreierf520ba52005-08-18 12:24:13 -07001979
1980 srq = pd->device->create_srq(pd, &attr, &udata);
1981 if (IS_ERR(srq)) {
1982 ret = PTR_ERR(srq);
Michael S. Tsirkinec924b42006-07-17 18:20:51 +03001983 goto err_put;
Roland Dreierf520ba52005-08-18 12:24:13 -07001984 }
1985
1986 srq->device = pd->device;
1987 srq->pd = pd;
Roland Dreier9ead1902006-06-17 20:44:49 -07001988 srq->uobject = &obj->uobject;
Roland Dreierf520ba52005-08-18 12:24:13 -07001989 srq->event_handler = attr.event_handler;
1990 srq->srq_context = attr.srq_context;
1991 atomic_inc(&pd->usecnt);
1992 atomic_set(&srq->usecnt, 0);
1993
Roland Dreier9ead1902006-06-17 20:44:49 -07001994 obj->uobject.object = srq;
1995 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
Roland Dreierf520ba52005-08-18 12:24:13 -07001996 if (ret)
1997 goto err_destroy;
1998
Roland Dreier9ead1902006-06-17 20:44:49 -07001999 memset(&resp, 0, sizeof resp);
2000 resp.srq_handle = obj->uobject.id;
Dotan Barakea88fd12006-02-23 12:36:18 -08002001 resp.max_wr = attr.attr.max_wr;
2002 resp.max_sge = attr.attr.max_sge;
Roland Dreierf520ba52005-08-18 12:24:13 -07002003
Roland Dreierf520ba52005-08-18 12:24:13 -07002004 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2005 &resp, sizeof resp)) {
2006 ret = -EFAULT;
Roland Dreier9ead1902006-06-17 20:44:49 -07002007 goto err_copy;
Roland Dreierf520ba52005-08-18 12:24:13 -07002008 }
2009
Roland Dreier9ead1902006-06-17 20:44:49 -07002010 put_pd_read(pd);
2011
Ingo Molnar95ed6442006-01-13 14:51:39 -08002012 mutex_lock(&file->mutex);
Roland Dreier9ead1902006-06-17 20:44:49 -07002013 list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
Ingo Molnar95ed6442006-01-13 14:51:39 -08002014 mutex_unlock(&file->mutex);
Roland Dreiereb9d3cd2005-09-27 15:07:25 -07002015
Roland Dreier9ead1902006-06-17 20:44:49 -07002016 obj->uobject.live = 1;
2017
2018 up_write(&obj->uobject.mutex);
Roland Dreierf520ba52005-08-18 12:24:13 -07002019
2020 return in_len;
2021
Roland Dreier9ead1902006-06-17 20:44:49 -07002022err_copy:
2023 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
Roland Dreierf520ba52005-08-18 12:24:13 -07002024
2025err_destroy:
2026 ib_destroy_srq(srq);
2027
Michael S. Tsirkinec924b42006-07-17 18:20:51 +03002028err_put:
2029 put_pd_read(pd);
2030
Roland Dreier9ead1902006-06-17 20:44:49 -07002031err:
2032 put_uobj_write(&obj->uobject);
Roland Dreierf520ba52005-08-18 12:24:13 -07002033 return ret;
2034}
2035
2036ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2037 const char __user *buf, int in_len,
2038 int out_len)
2039{
2040 struct ib_uverbs_modify_srq cmd;
Ralph Campbell9bc57e22006-08-11 14:58:09 -07002041 struct ib_udata udata;
Roland Dreierf520ba52005-08-18 12:24:13 -07002042 struct ib_srq *srq;
2043 struct ib_srq_attr attr;
2044 int ret;
2045
2046 if (copy_from_user(&cmd, buf, sizeof cmd))
2047 return -EFAULT;
2048
Ralph Campbell9bc57e22006-08-11 14:58:09 -07002049 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2050 out_len);
2051
Roland Dreier9ead1902006-06-17 20:44:49 -07002052 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2053 if (!srq)
2054 return -EINVAL;
Roland Dreierf520ba52005-08-18 12:24:13 -07002055
2056 attr.max_wr = cmd.max_wr;
Roland Dreierf520ba52005-08-18 12:24:13 -07002057 attr.srq_limit = cmd.srq_limit;
2058
Ralph Campbell9bc57e22006-08-11 14:58:09 -07002059 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
Roland Dreierf520ba52005-08-18 12:24:13 -07002060
Roland Dreier9ead1902006-06-17 20:44:49 -07002061 put_srq_read(srq);
Roland Dreierf520ba52005-08-18 12:24:13 -07002062
2063 return ret ? ret : in_len;
2064}
2065
Dotan Barak8bdb0e82006-02-13 16:31:57 -08002066ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2067 const char __user *buf,
2068 int in_len, int out_len)
2069{
2070 struct ib_uverbs_query_srq cmd;
2071 struct ib_uverbs_query_srq_resp resp;
2072 struct ib_srq_attr attr;
2073 struct ib_srq *srq;
2074 int ret;
2075
2076 if (out_len < sizeof resp)
2077 return -ENOSPC;
2078
2079 if (copy_from_user(&cmd, buf, sizeof cmd))
2080 return -EFAULT;
2081
Roland Dreier9ead1902006-06-17 20:44:49 -07002082 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2083 if (!srq)
2084 return -EINVAL;
Dotan Barak8bdb0e82006-02-13 16:31:57 -08002085
Roland Dreier9ead1902006-06-17 20:44:49 -07002086 ret = ib_query_srq(srq, &attr);
Dotan Barak8bdb0e82006-02-13 16:31:57 -08002087
Roland Dreier9ead1902006-06-17 20:44:49 -07002088 put_srq_read(srq);
Dotan Barak8bdb0e82006-02-13 16:31:57 -08002089
2090 if (ret)
Roland Dreier9ead1902006-06-17 20:44:49 -07002091 return ret;
Dotan Barak8bdb0e82006-02-13 16:31:57 -08002092
2093 memset(&resp, 0, sizeof resp);
2094
2095 resp.max_wr = attr.max_wr;
2096 resp.max_sge = attr.max_sge;
2097 resp.srq_limit = attr.srq_limit;
2098
2099 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2100 &resp, sizeof resp))
Roland Dreier9ead1902006-06-17 20:44:49 -07002101 return -EFAULT;
Dotan Barak8bdb0e82006-02-13 16:31:57 -08002102
Roland Dreier9ead1902006-06-17 20:44:49 -07002103 return in_len;
Dotan Barak8bdb0e82006-02-13 16:31:57 -08002104}
2105
Roland Dreierf520ba52005-08-18 12:24:13 -07002106ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2107 const char __user *buf, int in_len,
2108 int out_len)
2109{
Roland Dreier63aaf642005-09-09 15:55:08 -07002110 struct ib_uverbs_destroy_srq cmd;
2111 struct ib_uverbs_destroy_srq_resp resp;
Roland Dreier9ead1902006-06-17 20:44:49 -07002112 struct ib_uobject *uobj;
Roland Dreier63aaf642005-09-09 15:55:08 -07002113 struct ib_srq *srq;
Roland Dreier9ead1902006-06-17 20:44:49 -07002114 struct ib_uevent_object *obj;
Roland Dreier63aaf642005-09-09 15:55:08 -07002115 int ret = -EINVAL;
Roland Dreierf520ba52005-08-18 12:24:13 -07002116
2117 if (copy_from_user(&cmd, buf, sizeof cmd))
2118 return -EFAULT;
2119
Roland Dreier9ead1902006-06-17 20:44:49 -07002120 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2121 if (!uobj)
2122 return -EINVAL;
2123 srq = uobj->object;
2124 obj = container_of(uobj, struct ib_uevent_object, uobject);
Roland Dreierf520ba52005-08-18 12:24:13 -07002125
2126 ret = ib_destroy_srq(srq);
Roland Dreier9ead1902006-06-17 20:44:49 -07002127 if (!ret)
2128 uobj->live = 0;
Roland Dreierf520ba52005-08-18 12:24:13 -07002129
Roland Dreier9ead1902006-06-17 20:44:49 -07002130 put_uobj_write(uobj);
2131
2132 if (ret)
2133 return ret;
2134
2135 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
Roland Dreierf520ba52005-08-18 12:24:13 -07002136
Ingo Molnar95ed6442006-01-13 14:51:39 -08002137 mutex_lock(&file->mutex);
Roland Dreier9ead1902006-06-17 20:44:49 -07002138 list_del(&uobj->list);
Ingo Molnar95ed6442006-01-13 14:51:39 -08002139 mutex_unlock(&file->mutex);
Roland Dreierf520ba52005-08-18 12:24:13 -07002140
Roland Dreier9ead1902006-06-17 20:44:49 -07002141 ib_uverbs_release_uevent(file, obj);
Roland Dreier63aaf642005-09-09 15:55:08 -07002142
Roland Dreier9ead1902006-06-17 20:44:49 -07002143 memset(&resp, 0, sizeof resp);
2144 resp.events_reported = obj->events_reported;
Roland Dreier63aaf642005-09-09 15:55:08 -07002145
Roland Dreier9ead1902006-06-17 20:44:49 -07002146 put_uobj(uobj);
Roland Dreierf520ba52005-08-18 12:24:13 -07002147
Roland Dreier63aaf642005-09-09 15:55:08 -07002148 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2149 &resp, sizeof resp))
2150 ret = -EFAULT;
2151
Roland Dreierf520ba52005-08-18 12:24:13 -07002152 return ret ? ret : in_len;
2153}