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[IPoIB] use spin_trylock_irqsave()
[deliverable/linux.git] / drivers / infiniband / core / uverbs_cmd.c
CommitLineData
bc38a6ab
RD		 1/*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Cisco Systems. All rights reserved.
eb9d3cd5 4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
bc38a6ab
RD		 5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
34 * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
35 */
36
6b73597e 37#include <linux/file.h>
70a30e16 38#include <linux/fs.h>
6b73597e 39
bc38a6ab
RD		 40#include <asm/uaccess.h>
41
42#include "uverbs.h"
43
44#define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
45 do { \
46 (udata)->inbuf = (void __user *) (ibuf); \
47 (udata)->outbuf = (void __user *) (obuf); \
48 (udata)->inlen = (ilen); \
49 (udata)->outlen = (olen); \
50 } while (0)
51
bc38a6ab
RD		 52ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
53 const char __user *buf,
54 int in_len, int out_len)
55{
56 struct ib_uverbs_get_context cmd;
57 struct ib_uverbs_get_context_resp resp;
58 struct ib_udata udata;
59 struct ib_device *ibdev = file->device->ib_dev;
63c47c28 60 struct ib_ucontext *ucontext;
6b73597e 61 struct file *filp;
63c47c28 62 int ret;
bc38a6ab
RD		 63
64 if (out_len < sizeof resp)
65 return -ENOSPC;
66
67 if (copy_from_user(&cmd, buf, sizeof cmd))
68 return -EFAULT;
69
63c47c28
RD		 70 down(&file->mutex);
71
72 if (file->ucontext) {
73 ret = -EINVAL;
74 goto err;
75 }
76
bc38a6ab
RD		 77 INIT_UDATA(&udata, buf + sizeof cmd,
78 (unsigned long) cmd.response + sizeof resp,
79 in_len - sizeof cmd, out_len - sizeof resp);
80
63c47c28
RD		 81 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
82 if (IS_ERR(ucontext))
83 return PTR_ERR(file->ucontext);
bc38a6ab 84
63c47c28
RD		 85 ucontext->device = ibdev;
86 INIT_LIST_HEAD(&ucontext->pd_list);
87 INIT_LIST_HEAD(&ucontext->mr_list);
88 INIT_LIST_HEAD(&ucontext->mw_list);
89 INIT_LIST_HEAD(&ucontext->cq_list);
90 INIT_LIST_HEAD(&ucontext->qp_list);
91 INIT_LIST_HEAD(&ucontext->srq_list);
92 INIT_LIST_HEAD(&ucontext->ah_list);
bc38a6ab 93
6b73597e
RD		 94 resp.num_comp_vectors = file->device->num_comp_vectors;
95
96 filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
97 if (IS_ERR(filp)) {
98 ret = PTR_ERR(filp);
99 goto err_free;
100 }
bc38a6ab
RD		 101
102 if (copy_to_user((void __user *) (unsigned long) cmd.response,
63c47c28
RD		 103 &resp, sizeof resp)) {
104 ret = -EFAULT;
6b73597e 105 goto err_file;
63c47c28
RD		 106 }
107
6b73597e
RD		 108 file->async_file = filp->private_data;
109
110 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
111 ib_uverbs_event_handler);
112 ret = ib_register_event_handler(&file->event_handler);
113 if (ret)
114 goto err_file;
115
116 kref_get(&file->async_file->ref);
117 kref_get(&file->ref);
70a30e16 118 file->ucontext = ucontext;
6b73597e
RD		 119
120 fd_install(resp.async_fd, filp);
121
63c47c28 122 up(&file->mutex);
bc38a6ab
RD		 123
124 return in_len;
125
6b73597e
RD		 126err_file:
127 put_unused_fd(resp.async_fd);
128 fput(filp);
129
63c47c28
RD		 130err_free:
131 ibdev->dealloc_ucontext(ucontext);
bc38a6ab 132
63c47c28
RD		 133err:
134 up(&file->mutex);
135 return ret;
bc38a6ab
RD		 136}
137
138ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
139 const char __user *buf,
140 int in_len, int out_len)
141{
142 struct ib_uverbs_query_device cmd;
143 struct ib_uverbs_query_device_resp resp;
144 struct ib_device_attr attr;
145 int ret;
146
147 if (out_len < sizeof resp)
148 return -ENOSPC;
149
150 if (copy_from_user(&cmd, buf, sizeof cmd))
151 return -EFAULT;
152
153 ret = ib_query_device(file->device->ib_dev, &attr);
154 if (ret)
155 return ret;
156
157 memset(&resp, 0, sizeof resp);
158
159 resp.fw_ver = attr.fw_ver;
160 resp.node_guid = attr.node_guid;
161 resp.sys_image_guid = attr.sys_image_guid;
162 resp.max_mr_size = attr.max_mr_size;
163 resp.page_size_cap = attr.page_size_cap;
164 resp.vendor_id = attr.vendor_id;
165 resp.vendor_part_id = attr.vendor_part_id;
166 resp.hw_ver = attr.hw_ver;
167 resp.max_qp = attr.max_qp;
168 resp.max_qp_wr = attr.max_qp_wr;
169 resp.device_cap_flags = attr.device_cap_flags;
170 resp.max_sge = attr.max_sge;
171 resp.max_sge_rd = attr.max_sge_rd;
172 resp.max_cq = attr.max_cq;
173 resp.max_cqe = attr.max_cqe;
174 resp.max_mr = attr.max_mr;
175 resp.max_pd = attr.max_pd;
176 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
177 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
178 resp.max_res_rd_atom = attr.max_res_rd_atom;
179 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
180 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
181 resp.atomic_cap = attr.atomic_cap;
182 resp.max_ee = attr.max_ee;
183 resp.max_rdd = attr.max_rdd;
184 resp.max_mw = attr.max_mw;
185 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
186 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
187 resp.max_mcast_grp = attr.max_mcast_grp;
188 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
189 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
190 resp.max_ah = attr.max_ah;
191 resp.max_fmr = attr.max_fmr;
192 resp.max_map_per_fmr = attr.max_map_per_fmr;
193 resp.max_srq = attr.max_srq;
194 resp.max_srq_wr = attr.max_srq_wr;
195 resp.max_srq_sge = attr.max_srq_sge;
196 resp.max_pkeys = attr.max_pkeys;
197 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
198 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
199
200 if (copy_to_user((void __user *) (unsigned long) cmd.response,
201 &resp, sizeof resp))
202 return -EFAULT;
203
204 return in_len;
205}
206
207ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
208 const char __user *buf,
209 int in_len, int out_len)
210{
211 struct ib_uverbs_query_port cmd;
212 struct ib_uverbs_query_port_resp resp;
213 struct ib_port_attr attr;
214 int ret;
215
216 if (out_len < sizeof resp)
217 return -ENOSPC;
218
219 if (copy_from_user(&cmd, buf, sizeof cmd))
220 return -EFAULT;
221
222 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
223 if (ret)
224 return ret;
225
226 memset(&resp, 0, sizeof resp);
227
228 resp.state = attr.state;
229 resp.max_mtu = attr.max_mtu;
230 resp.active_mtu = attr.active_mtu;
231 resp.gid_tbl_len = attr.gid_tbl_len;
232 resp.port_cap_flags = attr.port_cap_flags;
233 resp.max_msg_sz = attr.max_msg_sz;
234 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
235 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
236 resp.pkey_tbl_len = attr.pkey_tbl_len;
237 resp.lid = attr.lid;
238 resp.sm_lid = attr.sm_lid;
239 resp.lmc = attr.lmc;
240 resp.max_vl_num = attr.max_vl_num;
241 resp.sm_sl = attr.sm_sl;
242 resp.subnet_timeout = attr.subnet_timeout;
243 resp.init_type_reply = attr.init_type_reply;
244 resp.active_width = attr.active_width;
245 resp.active_speed = attr.active_speed;
246 resp.phys_state = attr.phys_state;
247
248 if (copy_to_user((void __user *) (unsigned long) cmd.response,
249 &resp, sizeof resp))
250 return -EFAULT;
251
252 return in_len;
253}
254
bc38a6ab
RD		 255ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
256 const char __user *buf,
257 int in_len, int out_len)
258{
259 struct ib_uverbs_alloc_pd cmd;
260 struct ib_uverbs_alloc_pd_resp resp;
261 struct ib_udata udata;
262 struct ib_uobject *uobj;
263 struct ib_pd *pd;
264 int ret;
265
266 if (out_len < sizeof resp)
267 return -ENOSPC;
268
269 if (copy_from_user(&cmd, buf, sizeof cmd))
270 return -EFAULT;
271
272 INIT_UDATA(&udata, buf + sizeof cmd,
273 (unsigned long) cmd.response + sizeof resp,
274 in_len - sizeof cmd, out_len - sizeof resp);
275
276 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
277 if (!uobj)
278 return -ENOMEM;
279
280 uobj->context = file->ucontext;
281
282 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
283 file->ucontext, &udata);
284 if (IS_ERR(pd)) {
285 ret = PTR_ERR(pd);
286 goto err;
287 }
288
289 pd->device = file->device->ib_dev;
290 pd->uobject = uobj;
291 atomic_set(&pd->usecnt, 0);
292
eb9d3cd5
RD		 293 down(&ib_uverbs_idr_mutex);
294
bc38a6ab
RD		 295retry:
296 if (!idr_pre_get(&ib_uverbs_pd_idr, GFP_KERNEL)) {
297 ret = -ENOMEM;
eb9d3cd5 298 goto err_up;
bc38a6ab
RD		 299 }
300
bc38a6ab 301 ret = idr_get_new(&ib_uverbs_pd_idr, pd, &uobj->id);
bc38a6ab
RD		 302
303 if (ret == -EAGAIN)
304 goto retry;
305 if (ret)
eb9d3cd5 306 goto err_up;
bc38a6ab
RD		 307
308 memset(&resp, 0, sizeof resp);
309 resp.pd_handle = uobj->id;
310
311 if (copy_to_user((void __user *) (unsigned long) cmd.response,
312 &resp, sizeof resp)) {
313 ret = -EFAULT;
eb9d3cd5 314 goto err_idr;
bc38a6ab
RD		 315 }
316
eb9d3cd5
RD		 317 down(&file->mutex);
318 list_add_tail(&uobj->list, &file->ucontext->pd_list);
63c47c28 319 up(&file->mutex);
bc38a6ab 320
bc38a6ab
RD		 321 up(&ib_uverbs_idr_mutex);
322
eb9d3cd5
RD		 323 return in_len;
324
325err_idr:
326 idr_remove(&ib_uverbs_pd_idr, uobj->id);
327
328err_up:
329 up(&ib_uverbs_idr_mutex);
bc38a6ab
RD		 330 ib_dealloc_pd(pd);
331
332err:
333 kfree(uobj);
334 return ret;
335}
336
337ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
338 const char __user *buf,
339 int in_len, int out_len)
340{
341 struct ib_uverbs_dealloc_pd cmd;
342 struct ib_pd *pd;
343 struct ib_uobject *uobj;
344 int ret = -EINVAL;
345
346 if (copy_from_user(&cmd, buf, sizeof cmd))
347 return -EFAULT;
348
349 down(&ib_uverbs_idr_mutex);
350
351 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
352 if (!pd || pd->uobject->context != file->ucontext)
353 goto out;
354
355 uobj = pd->uobject;
356
357 ret = ib_dealloc_pd(pd);
358 if (ret)
359 goto out;
360
361 idr_remove(&ib_uverbs_pd_idr, cmd.pd_handle);
362
63c47c28 363 down(&file->mutex);
bc38a6ab 364 list_del(&uobj->list);
63c47c28 365 up(&file->mutex);
bc38a6ab
RD		 366
367 kfree(uobj);
368
369out:
370 up(&ib_uverbs_idr_mutex);
371
372 return ret ? ret : in_len;
373}
374
375ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
376 const char __user *buf, int in_len,
377 int out_len)
378{
379 struct ib_uverbs_reg_mr cmd;
380 struct ib_uverbs_reg_mr_resp resp;
381 struct ib_udata udata;
382 struct ib_umem_object *obj;
383 struct ib_pd *pd;
384 struct ib_mr *mr;
385 int ret;
386
387 if (out_len < sizeof resp)
388 return -ENOSPC;
389
390 if (copy_from_user(&cmd, buf, sizeof cmd))
391 return -EFAULT;
392
393 INIT_UDATA(&udata, buf + sizeof cmd,
394 (unsigned long) cmd.response + sizeof resp,
395 in_len - sizeof cmd, out_len - sizeof resp);
396
397 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
398 return -EINVAL;
399
f575394f
RD		 400 /*
401 * Local write permission is required if remote write or
402 * remote atomic permission is also requested.
403 */
404 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
405 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
406 return -EINVAL;
407
bc38a6ab
RD		 408 obj = kmalloc(sizeof *obj, GFP_KERNEL);
409 if (!obj)
410 return -ENOMEM;
411
412 obj->uobject.context = file->ucontext;
413
414 /*
415 * We ask for writable memory if any access flags other than
416 * "remote read" are set. "Local write" and "remote write"
417 * obviously require write access. "Remote atomic" can do
418 * things like fetch and add, which will modify memory, and
419 * "MW bind" can change permissions by binding a window.
420 */
421 ret = ib_umem_get(file->device->ib_dev, &obj->umem,
422 (void *) (unsigned long) cmd.start, cmd.length,
423 !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ));
424 if (ret)
425 goto err_free;
426
427 obj->umem.virt_base = cmd.hca_va;
428
429 down(&ib_uverbs_idr_mutex);
430
431 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
432 if (!pd || pd->uobject->context != file->ucontext) {
433 ret = -EINVAL;
434 goto err_up;
435 }
436
437 if (!pd->device->reg_user_mr) {
438 ret = -ENOSYS;
439 goto err_up;
440 }
441
442 mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata);
443 if (IS_ERR(mr)) {
444 ret = PTR_ERR(mr);
445 goto err_up;
446 }
447
448 mr->device = pd->device;
449 mr->pd = pd;
450 mr->uobject = &obj->uobject;
451 atomic_inc(&pd->usecnt);
452 atomic_set(&mr->usecnt, 0);
453
454 memset(&resp, 0, sizeof resp);
455 resp.lkey = mr->lkey;
456 resp.rkey = mr->rkey;
457
458retry:
459 if (!idr_pre_get(&ib_uverbs_mr_idr, GFP_KERNEL)) {
460 ret = -ENOMEM;
461 goto err_unreg;
462 }
463
464 ret = idr_get_new(&ib_uverbs_mr_idr, mr, &obj->uobject.id);
465
466 if (ret == -EAGAIN)
467 goto retry;
468 if (ret)
469 goto err_unreg;
470
471 resp.mr_handle = obj->uobject.id;
472
bc38a6ab
RD		 473 if (copy_to_user((void __user *) (unsigned long) cmd.response,
474 &resp, sizeof resp)) {
475 ret = -EFAULT;
eb9d3cd5 476 goto err_idr;
bc38a6ab
RD		 477 }
478
eb9d3cd5
RD		 479 down(&file->mutex);
480 list_add_tail(&obj->uobject.list, &file->ucontext->mr_list);
481 up(&file->mutex);
482
bc38a6ab
RD		 483 up(&ib_uverbs_idr_mutex);
484
485 return in_len;
486
eb9d3cd5
RD		 487err_idr:
488 idr_remove(&ib_uverbs_mr_idr, obj->uobject.id);
bc38a6ab
RD		 489
490err_unreg:
491 ib_dereg_mr(mr);
492
493err_up:
494 up(&ib_uverbs_idr_mutex);
495
496 ib_umem_release(file->device->ib_dev, &obj->umem);
497
498err_free:
499 kfree(obj);
500 return ret;
501}
502
503ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
504 const char __user *buf, int in_len,
505 int out_len)
506{
507 struct ib_uverbs_dereg_mr cmd;
508 struct ib_mr *mr;
509 struct ib_umem_object *memobj;
510 int ret = -EINVAL;
511
512 if (copy_from_user(&cmd, buf, sizeof cmd))
513 return -EFAULT;
514
515 down(&ib_uverbs_idr_mutex);
516
517 mr = idr_find(&ib_uverbs_mr_idr, cmd.mr_handle);
518 if (!mr || mr->uobject->context != file->ucontext)
519 goto out;
520
521 memobj = container_of(mr->uobject, struct ib_umem_object, uobject);
522
523 ret = ib_dereg_mr(mr);
524 if (ret)
525 goto out;
526
527 idr_remove(&ib_uverbs_mr_idr, cmd.mr_handle);
528
63c47c28 529 down(&file->mutex);
bc38a6ab 530 list_del(&memobj->uobject.list);
63c47c28 531 up(&file->mutex);
bc38a6ab
RD		 532
533 ib_umem_release(file->device->ib_dev, &memobj->umem);
534 kfree(memobj);
535
536out:
537 up(&ib_uverbs_idr_mutex);
538
539 return ret ? ret : in_len;
540}
541
6b73597e
RD		 542ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
543 const char __user *buf, int in_len,
544 int out_len)
545{
546 struct ib_uverbs_create_comp_channel cmd;
547 struct ib_uverbs_create_comp_channel_resp resp;
548 struct file *filp;
549
550 if (out_len < sizeof resp)
551 return -ENOSPC;
552
553 if (copy_from_user(&cmd, buf, sizeof cmd))
554 return -EFAULT;
555
556 filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
557 if (IS_ERR(filp))
558 return PTR_ERR(filp);
559
560 if (copy_to_user((void __user *) (unsigned long) cmd.response,
561 &resp, sizeof resp)) {
562 put_unused_fd(resp.fd);
563 fput(filp);
564 return -EFAULT;
565 }
566
567 fd_install(resp.fd, filp);
568 return in_len;
569}
570
bc38a6ab
RD		 571ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
572 const char __user *buf, int in_len,
573 int out_len)
574{
575 struct ib_uverbs_create_cq cmd;
576 struct ib_uverbs_create_cq_resp resp;
577 struct ib_udata udata;
63aaf647 578 struct ib_ucq_object *uobj;
6b73597e 579 struct ib_uverbs_event_file *ev_file = NULL;
bc38a6ab
RD		 580 struct ib_cq *cq;
581 int ret;
582
583 if (out_len < sizeof resp)
584 return -ENOSPC;
585
586 if (copy_from_user(&cmd, buf, sizeof cmd))
587 return -EFAULT;
588
589 INIT_UDATA(&udata, buf + sizeof cmd,
590 (unsigned long) cmd.response + sizeof resp,
591 in_len - sizeof cmd, out_len - sizeof resp);
592
6b73597e 593 if (cmd.comp_vector >= file->device->num_comp_vectors)
bc38a6ab
RD		 594 return -EINVAL;
595
6b73597e
RD		 596 if (cmd.comp_channel >= 0)
597 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
598
bc38a6ab
RD		 599 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
600 if (!uobj)
601 return -ENOMEM;
602
63aaf647
RD		 603 uobj->uobject.user_handle = cmd.user_handle;
604 uobj->uobject.context = file->ucontext;
605 uobj->comp_events_reported = 0;
606 uobj->async_events_reported = 0;
607 INIT_LIST_HEAD(&uobj->comp_list);
608 INIT_LIST_HEAD(&uobj->async_list);
bc38a6ab
RD		 609
610 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
611 file->ucontext, &udata);
612 if (IS_ERR(cq)) {
613 ret = PTR_ERR(cq);
614 goto err;
615 }
616
617 cq->device = file->device->ib_dev;
63aaf647 618 cq->uobject = &uobj->uobject;
bc38a6ab
RD		 619 cq->comp_handler = ib_uverbs_comp_handler;
620 cq->event_handler = ib_uverbs_cq_event_handler;
6b73597e 621 cq->cq_context = ev_file;
bc38a6ab
RD		 622 atomic_set(&cq->usecnt, 0);
623
eb9d3cd5
RD		 624 down(&ib_uverbs_idr_mutex);
625
bc38a6ab
RD		 626retry:
627 if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) {
628 ret = -ENOMEM;
eb9d3cd5 629 goto err_up;
bc38a6ab
RD		 630 }
631
63aaf647 632 ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->uobject.id);
bc38a6ab
RD		 633
634 if (ret == -EAGAIN)
635 goto retry;
636 if (ret)
eb9d3cd5 637 goto err_up;
bc38a6ab
RD		 638
639 memset(&resp, 0, sizeof resp);
63aaf647 640 resp.cq_handle = uobj->uobject.id;
bc38a6ab
RD		 641 resp.cqe = cq->cqe;
642
643 if (copy_to_user((void __user *) (unsigned long) cmd.response,
644 &resp, sizeof resp)) {
645 ret = -EFAULT;
eb9d3cd5 646 goto err_idr;
bc38a6ab
RD		 647 }
648
eb9d3cd5
RD		 649 down(&file->mutex);
650 list_add_tail(&uobj->uobject.list, &file->ucontext->cq_list);
63c47c28 651 up(&file->mutex);
bc38a6ab 652
bc38a6ab
RD		 653 up(&ib_uverbs_idr_mutex);
654
eb9d3cd5
RD		 655 return in_len;
656
657err_idr:
658 idr_remove(&ib_uverbs_cq_idr, uobj->uobject.id);
659
660err_up:
661 up(&ib_uverbs_idr_mutex);
bc38a6ab
RD		 662 ib_destroy_cq(cq);
663
664err:
665 kfree(uobj);
666 return ret;
667}
668
67cdb40c
RD		 669ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
670 const char __user *buf, int in_len,
671 int out_len)
672{
673 struct ib_uverbs_poll_cq cmd;
674 struct ib_uverbs_poll_cq_resp *resp;
675 struct ib_cq *cq;
676 struct ib_wc *wc;
677 int ret = 0;
678 int i;
679 int rsize;
680
681 if (copy_from_user(&cmd, buf, sizeof cmd))
682 return -EFAULT;
683
684 wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
685 if (!wc)
686 return -ENOMEM;
687
688 rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
689 resp = kmalloc(rsize, GFP_KERNEL);
690 if (!resp) {
691 ret = -ENOMEM;
692 goto out_wc;
693 }
694
695 down(&ib_uverbs_idr_mutex);
696 cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
697 if (!cq || cq->uobject->context != file->ucontext) {
698 ret = -EINVAL;
699 goto out;
700 }
701
702 resp->count = ib_poll_cq(cq, cmd.ne, wc);
703
704 for (i = 0; i < resp->count; i++) {
705 resp->wc[i].wr_id = wc[i].wr_id;
706 resp->wc[i].status = wc[i].status;
707 resp->wc[i].opcode = wc[i].opcode;
708 resp->wc[i].vendor_err = wc[i].vendor_err;
709 resp->wc[i].byte_len = wc[i].byte_len;
710 resp->wc[i].imm_data = wc[i].imm_data;
711 resp->wc[i].qp_num = wc[i].qp_num;
712 resp->wc[i].src_qp = wc[i].src_qp;
713 resp->wc[i].wc_flags = wc[i].wc_flags;
714 resp->wc[i].pkey_index = wc[i].pkey_index;
715 resp->wc[i].slid = wc[i].slid;
716 resp->wc[i].sl = wc[i].sl;
717 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
718 resp->wc[i].port_num = wc[i].port_num;
719 }
720
721 if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
722 ret = -EFAULT;
723
724out:
725 up(&ib_uverbs_idr_mutex);
726 kfree(resp);
727
728out_wc:
729 kfree(wc);
730 return ret ? ret : in_len;
731}
732
733ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
734 const char __user *buf, int in_len,
735 int out_len)
736{
737 struct ib_uverbs_req_notify_cq cmd;
738 struct ib_cq *cq;
739 int ret = -EINVAL;
740
741 if (copy_from_user(&cmd, buf, sizeof cmd))
742 return -EFAULT;
743
744 down(&ib_uverbs_idr_mutex);
745 cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
746 if (cq && cq->uobject->context == file->ucontext) {
747 ib_req_notify_cq(cq, cmd.solicited_only ?
748 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
749 ret = in_len;
750 }
751 up(&ib_uverbs_idr_mutex);
752
753 return ret;
754}
755
bc38a6ab
RD		 756ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
757 const char __user *buf, int in_len,
758 int out_len)
759{
63aaf647
RD		 760 struct ib_uverbs_destroy_cq cmd;
761 struct ib_uverbs_destroy_cq_resp resp;
762 struct ib_cq *cq;
763 struct ib_ucq_object *uobj;
6b73597e 764 struct ib_uverbs_event_file *ev_file;
63aaf647
RD		 765 u64 user_handle;
766 int ret = -EINVAL;
bc38a6ab
RD		 767
768 if (copy_from_user(&cmd, buf, sizeof cmd))
769 return -EFAULT;
770
63aaf647
RD		 771 memset(&resp, 0, sizeof resp);
772
bc38a6ab
RD		 773 down(&ib_uverbs_idr_mutex);
774
775 cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
776 if (!cq || cq->uobject->context != file->ucontext)
777 goto out;
778
63aaf647 779 user_handle = cq->uobject->user_handle;
6b73597e
RD		 780 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
781 ev_file = cq->cq_context;
bc38a6ab
RD		 782
783 ret = ib_destroy_cq(cq);
784 if (ret)
785 goto out;
786
787 idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle);
788
63c47c28 789 down(&file->mutex);
63aaf647 790 list_del(&uobj->uobject.list);
63c47c28 791 up(&file->mutex);
bc38a6ab 792
70a30e16 793 ib_uverbs_release_ucq(file, ev_file, uobj);
63aaf647
RD		 794
795 resp.comp_events_reported = uobj->comp_events_reported;
796 resp.async_events_reported = uobj->async_events_reported;
797
bc38a6ab
RD		 798 kfree(uobj);
799
63aaf647
RD		 800 if (copy_to_user((void __user *) (unsigned long) cmd.response,
801 &resp, sizeof resp))
802 ret = -EFAULT;
803
bc38a6ab
RD		 804out:
805 up(&ib_uverbs_idr_mutex);
806
807 return ret ? ret : in_len;
808}
809
810ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
811 const char __user *buf, int in_len,
812 int out_len)
813{
814 struct ib_uverbs_create_qp cmd;
815 struct ib_uverbs_create_qp_resp resp;
816 struct ib_udata udata;
63aaf647 817 struct ib_uevent_object *uobj;
bc38a6ab
RD		 818 struct ib_pd *pd;
819 struct ib_cq *scq, *rcq;
f520ba5a 820 struct ib_srq *srq;
bc38a6ab
RD		 821 struct ib_qp *qp;
822 struct ib_qp_init_attr attr;
823 int ret;
824
825 if (out_len < sizeof resp)
826 return -ENOSPC;
827
828 if (copy_from_user(&cmd, buf, sizeof cmd))
829 return -EFAULT;
830
831 INIT_UDATA(&udata, buf + sizeof cmd,
832 (unsigned long) cmd.response + sizeof resp,
833 in_len - sizeof cmd, out_len - sizeof resp);
834
835 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
836 if (!uobj)
837 return -ENOMEM;
838
839 down(&ib_uverbs_idr_mutex);
840
841 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
842 scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle);
843 rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle);
f520ba5a 844 srq = cmd.is_srq ? idr_find(&ib_uverbs_srq_idr, cmd.srq_handle) : NULL;
bc38a6ab
RD		 845
846 if (!pd || pd->uobject->context != file->ucontext ||
847 !scq || scq->uobject->context != file->ucontext ||
f520ba5a
RD		 848 !rcq || rcq->uobject->context != file->ucontext ||
849 (cmd.is_srq && (!srq || srq->uobject->context != file->ucontext))) {
bc38a6ab
RD		 850 ret = -EINVAL;
851 goto err_up;
852 }
853
854 attr.event_handler = ib_uverbs_qp_event_handler;
855 attr.qp_context = file;
856 attr.send_cq = scq;
857 attr.recv_cq = rcq;
f520ba5a 858 attr.srq = srq;
bc38a6ab
RD		 859 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
860 attr.qp_type = cmd.qp_type;
861
862 attr.cap.max_send_wr = cmd.max_send_wr;
863 attr.cap.max_recv_wr = cmd.max_recv_wr;
864 attr.cap.max_send_sge = cmd.max_send_sge;
865 attr.cap.max_recv_sge = cmd.max_recv_sge;
866 attr.cap.max_inline_data = cmd.max_inline_data;
867
63aaf647
RD		 868 uobj->uobject.user_handle = cmd.user_handle;
869 uobj->uobject.context = file->ucontext;
870 uobj->events_reported = 0;
871 INIT_LIST_HEAD(&uobj->event_list);
bc38a6ab
RD		 872
873 qp = pd->device->create_qp(pd, &attr, &udata);
874 if (IS_ERR(qp)) {
875 ret = PTR_ERR(qp);
876 goto err_up;
877 }
878
879 qp->device = pd->device;
880 qp->pd = pd;
881 qp->send_cq = attr.send_cq;
882 qp->recv_cq = attr.recv_cq;
883 qp->srq = attr.srq;
63aaf647 884 qp->uobject = &uobj->uobject;
bc38a6ab
RD		 885 qp->event_handler = attr.event_handler;
886 qp->qp_context = attr.qp_context;
887 qp->qp_type = attr.qp_type;
888 atomic_inc(&pd->usecnt);
889 atomic_inc(&attr.send_cq->usecnt);
890 atomic_inc(&attr.recv_cq->usecnt);
891 if (attr.srq)
892 atomic_inc(&attr.srq->usecnt);
893
894 memset(&resp, 0, sizeof resp);
895 resp.qpn = qp->qp_num;
896
897retry:
898 if (!idr_pre_get(&ib_uverbs_qp_idr, GFP_KERNEL)) {
899 ret = -ENOMEM;
900 goto err_destroy;
901 }
902
63aaf647 903 ret = idr_get_new(&ib_uverbs_qp_idr, qp, &uobj->uobject.id);
bc38a6ab
RD		 904
905 if (ret == -EAGAIN)
906 goto retry;
907 if (ret)
908 goto err_destroy;
909
63aaf647 910 resp.qp_handle = uobj->uobject.id;
bc38a6ab 911
bc38a6ab
RD		 912 if (copy_to_user((void __user *) (unsigned long) cmd.response,
913 &resp, sizeof resp)) {
914 ret = -EFAULT;
eb9d3cd5 915 goto err_idr;
bc38a6ab
RD		 916 }
917
eb9d3cd5
RD		 918 down(&file->mutex);
919 list_add_tail(&uobj->uobject.list, &file->ucontext->qp_list);
920 up(&file->mutex);
921
bc38a6ab
RD		 922 up(&ib_uverbs_idr_mutex);
923
924 return in_len;
925
eb9d3cd5
RD		 926err_idr:
927 idr_remove(&ib_uverbs_qp_idr, uobj->uobject.id);
bc38a6ab
RD		 928
929err_destroy:
930 ib_destroy_qp(qp);
931
932err_up:
933 up(&ib_uverbs_idr_mutex);
934
935 kfree(uobj);
936 return ret;
937}
938
939ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
940 const char __user *buf, int in_len,
941 int out_len)
942{
943 struct ib_uverbs_modify_qp cmd;
944 struct ib_qp *qp;
945 struct ib_qp_attr *attr;
946 int ret;
947
948 if (copy_from_user(&cmd, buf, sizeof cmd))
949 return -EFAULT;
950
951 attr = kmalloc(sizeof *attr, GFP_KERNEL);
952 if (!attr)
953 return -ENOMEM;
954
955 down(&ib_uverbs_idr_mutex);
956
957 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
958 if (!qp || qp->uobject->context != file->ucontext) {
959 ret = -EINVAL;
960 goto out;
961 }
962
963 attr->qp_state = cmd.qp_state;
964 attr->cur_qp_state = cmd.cur_qp_state;
965 attr->path_mtu = cmd.path_mtu;
966 attr->path_mig_state = cmd.path_mig_state;
967 attr->qkey = cmd.qkey;
968 attr->rq_psn = cmd.rq_psn;
969 attr->sq_psn = cmd.sq_psn;
970 attr->dest_qp_num = cmd.dest_qp_num;
971 attr->qp_access_flags = cmd.qp_access_flags;
972 attr->pkey_index = cmd.pkey_index;
973 attr->alt_pkey_index = cmd.pkey_index;
974 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
975 attr->max_rd_atomic = cmd.max_rd_atomic;
976 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
977 attr->min_rnr_timer = cmd.min_rnr_timer;
978 attr->port_num = cmd.port_num;
979 attr->timeout = cmd.timeout;
980 attr->retry_cnt = cmd.retry_cnt;
981 attr->rnr_retry = cmd.rnr_retry;
982 attr->alt_port_num = cmd.alt_port_num;
983 attr->alt_timeout = cmd.alt_timeout;
984
985 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
986 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
987 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
988 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
989 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
990 attr->ah_attr.dlid = cmd.dest.dlid;
991 attr->ah_attr.sl = cmd.dest.sl;
992 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
993 attr->ah_attr.static_rate = cmd.dest.static_rate;
994 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
995 attr->ah_attr.port_num = cmd.dest.port_num;
996
997 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
998 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
999 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1000 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1001 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1002 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1003 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1004 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1005 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1006 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1007 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1008
1009 ret = ib_modify_qp(qp, attr, cmd.attr_mask);
1010 if (ret)
1011 goto out;
1012
1013 ret = in_len;
1014
1015out:
1016 up(&ib_uverbs_idr_mutex);
1017 kfree(attr);
1018
1019 return ret;
1020}
1021
1022ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1023 const char __user *buf, int in_len,
1024 int out_len)
1025{
63aaf647
RD		 1026 struct ib_uverbs_destroy_qp cmd;
1027 struct ib_uverbs_destroy_qp_resp resp;
1028 struct ib_qp *qp;
1029 struct ib_uevent_object *uobj;
63aaf647 1030 int ret = -EINVAL;
bc38a6ab
RD		 1031
1032 if (copy_from_user(&cmd, buf, sizeof cmd))
1033 return -EFAULT;
1034
63aaf647
RD		 1035 memset(&resp, 0, sizeof resp);
1036
bc38a6ab
RD		 1037 down(&ib_uverbs_idr_mutex);
1038
1039 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1040 if (!qp || qp->uobject->context != file->ucontext)
1041 goto out;
1042
63aaf647 1043 uobj = container_of(qp->uobject, struct ib_uevent_object, uobject);
bc38a6ab
RD		 1044
1045 ret = ib_destroy_qp(qp);
1046 if (ret)
1047 goto out;
1048
1049 idr_remove(&ib_uverbs_qp_idr, cmd.qp_handle);
1050
63c47c28 1051 down(&file->mutex);
63aaf647 1052 list_del(&uobj->uobject.list);
63c47c28 1053 up(&file->mutex);
bc38a6ab 1054
70a30e16 1055 ib_uverbs_release_uevent(file, uobj);
63aaf647
RD		 1056
1057 resp.events_reported = uobj->events_reported;
1058
bc38a6ab
RD		 1059 kfree(uobj);
1060
63aaf647
RD		 1061 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1062 &resp, sizeof resp))
1063 ret = -EFAULT;
1064
bc38a6ab
RD		 1065out:
1066 up(&ib_uverbs_idr_mutex);
1067
1068 return ret ? ret : in_len;
1069}
1070
67cdb40c
RD		 1071ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1072 const char __user *buf, int in_len,
1073 int out_len)
1074{
1075 struct ib_uverbs_post_send cmd;
1076 struct ib_uverbs_post_send_resp resp;
1077 struct ib_uverbs_send_wr *user_wr;
1078 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
1079 struct ib_qp *qp;
1080 int i, sg_ind;
1081 ssize_t ret = -EINVAL;
1082
1083 if (copy_from_user(&cmd, buf, sizeof cmd))
1084 return -EFAULT;
1085
1086 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1087 cmd.sge_count * sizeof (struct ib_uverbs_sge))
1088 return -EINVAL;
1089
1090 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1091 return -EINVAL;
1092
1093 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1094 if (!user_wr)
1095 return -ENOMEM;
1096
1097 down(&ib_uverbs_idr_mutex);
1098
1099 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1100 if (!qp || qp->uobject->context != file->ucontext)
1101 goto out;
1102
1103 sg_ind = 0;
1104 last = NULL;
1105 for (i = 0; i < cmd.wr_count; ++i) {
1106 if (copy_from_user(user_wr,
1107 buf + sizeof cmd + i * cmd.wqe_size,
1108 cmd.wqe_size)) {
1109 ret = -EFAULT;
1110 goto out;
1111 }
1112
1113 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1114 ret = -EINVAL;
1115 goto out;
1116 }
1117
1118 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1119 user_wr->num_sge * sizeof (struct ib_sge),
1120 GFP_KERNEL);
1121 if (!next) {
1122 ret = -ENOMEM;
1123 goto out;
1124 }
1125
1126 if (!last)
1127 wr = next;
1128 else
1129 last->next = next;
1130 last = next;
1131
1132 next->next = NULL;
1133 next->wr_id = user_wr->wr_id;
1134 next->num_sge = user_wr->num_sge;
1135 next->opcode = user_wr->opcode;
1136 next->send_flags = user_wr->send_flags;
1137 next->imm_data = user_wr->imm_data;
1138
1139 if (qp->qp_type == IB_QPT_UD) {
1140 next->wr.ud.ah = idr_find(&ib_uverbs_ah_idr,
1141 user_wr->wr.ud.ah);
1142 if (!next->wr.ud.ah) {
1143 ret = -EINVAL;
1144 goto out;
1145 }
1146 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
1147 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1148 } else {
1149 switch (next->opcode) {
1150 case IB_WR_RDMA_WRITE:
1151 case IB_WR_RDMA_WRITE_WITH_IMM:
1152 case IB_WR_RDMA_READ:
1153 next->wr.rdma.remote_addr =
1154 user_wr->wr.rdma.remote_addr;
1155 next->wr.rdma.rkey =
1156 user_wr->wr.rdma.rkey;
1157 break;
1158 case IB_WR_ATOMIC_CMP_AND_SWP:
1159 case IB_WR_ATOMIC_FETCH_AND_ADD:
1160 next->wr.atomic.remote_addr =
1161 user_wr->wr.atomic.remote_addr;
1162 next->wr.atomic.compare_add =
1163 user_wr->wr.atomic.compare_add;
1164 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1165 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1166 break;
1167 default:
1168 break;
1169 }
1170 }
1171
1172 if (next->num_sge) {
1173 next->sg_list = (void *) next +
1174 ALIGN(sizeof *next, sizeof (struct ib_sge));
1175 if (copy_from_user(next->sg_list,
1176 buf + sizeof cmd +
1177 cmd.wr_count * cmd.wqe_size +
1178 sg_ind * sizeof (struct ib_sge),
1179 next->num_sge * sizeof (struct ib_sge))) {
1180 ret = -EFAULT;
1181 goto out;
1182 }
1183 sg_ind += next->num_sge;
1184 } else
1185 next->sg_list = NULL;
1186 }
1187
1188 resp.bad_wr = 0;
1189 ret = qp->device->post_send(qp, wr, &bad_wr);
1190 if (ret)
1191 for (next = wr; next; next = next->next) {
1192 ++resp.bad_wr;
1193 if (next == bad_wr)
1194 break;
1195 }
1196
1197 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1198 &resp, sizeof resp))
1199 ret = -EFAULT;
1200
1201out:
1202 up(&ib_uverbs_idr_mutex);
1203
1204 while (wr) {
1205 next = wr->next;
1206 kfree(wr);
1207 wr = next;
1208 }
1209
1210 kfree(user_wr);
1211
1212 return ret ? ret : in_len;
1213}
1214
1215static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1216 int in_len,
1217 u32 wr_count,
1218 u32 sge_count,
1219 u32 wqe_size)
1220{
1221 struct ib_uverbs_recv_wr *user_wr;
1222 struct ib_recv_wr *wr = NULL, *last, *next;
1223 int sg_ind;
1224 int i;
1225 int ret;
1226
1227 if (in_len < wqe_size * wr_count +
1228 sge_count * sizeof (struct ib_uverbs_sge))
1229 return ERR_PTR(-EINVAL);
1230
1231 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1232 return ERR_PTR(-EINVAL);
1233
1234 user_wr = kmalloc(wqe_size, GFP_KERNEL);
1235 if (!user_wr)
1236 return ERR_PTR(-ENOMEM);
1237
1238 sg_ind = 0;
1239 last = NULL;
1240 for (i = 0; i < wr_count; ++i) {
1241 if (copy_from_user(user_wr, buf + i * wqe_size,
1242 wqe_size)) {
1243 ret = -EFAULT;
1244 goto err;
1245 }
1246
1247 if (user_wr->num_sge + sg_ind > sge_count) {
1248 ret = -EINVAL;
1249 goto err;
1250 }
1251
1252 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1253 user_wr->num_sge * sizeof (struct ib_sge),
1254 GFP_KERNEL);
1255 if (!next) {
1256 ret = -ENOMEM;
1257 goto err;
1258 }
1259
1260 if (!last)
1261 wr = next;
1262 else
1263 last->next = next;
1264 last = next;
1265
1266 next->next = NULL;
1267 next->wr_id = user_wr->wr_id;
1268 next->num_sge = user_wr->num_sge;
1269
1270 if (next->num_sge) {
1271 next->sg_list = (void *) next +
1272 ALIGN(sizeof *next, sizeof (struct ib_sge));
1273 if (copy_from_user(next->sg_list,
1274 buf + wr_count * wqe_size +
1275 sg_ind * sizeof (struct ib_sge),
1276 next->num_sge * sizeof (struct ib_sge))) {
1277 ret = -EFAULT;
1278 goto err;
1279 }
1280 sg_ind += next->num_sge;
1281 } else
1282 next->sg_list = NULL;
1283 }
1284
1285 kfree(user_wr);
1286 return wr;
1287
1288err:
1289 kfree(user_wr);
1290
1291 while (wr) {
1292 next = wr->next;
1293 kfree(wr);
1294 wr = next;
1295 }
1296
1297 return ERR_PTR(ret);
1298}
1299
1300ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1301 const char __user *buf, int in_len,
1302 int out_len)
1303{
1304 struct ib_uverbs_post_recv cmd;
1305 struct ib_uverbs_post_recv_resp resp;
1306 struct ib_recv_wr *wr, *next, *bad_wr;
1307 struct ib_qp *qp;
1308 ssize_t ret = -EINVAL;
1309
1310 if (copy_from_user(&cmd, buf, sizeof cmd))
1311 return -EFAULT;
1312
1313 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1314 in_len - sizeof cmd, cmd.wr_count,
1315 cmd.sge_count, cmd.wqe_size);
1316 if (IS_ERR(wr))
1317 return PTR_ERR(wr);
1318
1319 down(&ib_uverbs_idr_mutex);
1320
1321 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1322 if (!qp || qp->uobject->context != file->ucontext)
1323 goto out;
1324
1325 resp.bad_wr = 0;
1326 ret = qp->device->post_recv(qp, wr, &bad_wr);
1327 if (ret)
1328 for (next = wr; next; next = next->next) {
1329 ++resp.bad_wr;
1330 if (next == bad_wr)
1331 break;
1332 }
1333
1334
1335 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1336 &resp, sizeof resp))
1337 ret = -EFAULT;
1338
1339out:
1340 up(&ib_uverbs_idr_mutex);
1341
1342 while (wr) {
1343 next = wr->next;
1344 kfree(wr);
1345 wr = next;
1346 }
1347
1348 return ret ? ret : in_len;
1349}
1350
1351ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1352 const char __user *buf, int in_len,
1353 int out_len)
1354{
1355 struct ib_uverbs_post_srq_recv cmd;
1356 struct ib_uverbs_post_srq_recv_resp resp;
1357 struct ib_recv_wr *wr, *next, *bad_wr;
1358 struct ib_srq *srq;
1359 ssize_t ret = -EINVAL;
1360
1361 if (copy_from_user(&cmd, buf, sizeof cmd))
1362 return -EFAULT;
1363
1364 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1365 in_len - sizeof cmd, cmd.wr_count,
1366 cmd.sge_count, cmd.wqe_size);
1367 if (IS_ERR(wr))
1368 return PTR_ERR(wr);
1369
1370 down(&ib_uverbs_idr_mutex);
1371
1372 srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1373 if (!srq || srq->uobject->context != file->ucontext)
1374 goto out;
1375
1376 resp.bad_wr = 0;
1377 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1378 if (ret)
1379 for (next = wr; next; next = next->next) {
1380 ++resp.bad_wr;
1381 if (next == bad_wr)
1382 break;
1383 }
1384
1385
1386 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1387 &resp, sizeof resp))
1388 ret = -EFAULT;
1389
1390out:
1391 up(&ib_uverbs_idr_mutex);
1392
1393 while (wr) {
1394 next = wr->next;
1395 kfree(wr);
1396 wr = next;
1397 }
1398
1399 return ret ? ret : in_len;
1400}
1401
1402ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1403 const char __user *buf, int in_len,
1404 int out_len)
1405{
1406 struct ib_uverbs_create_ah cmd;
1407 struct ib_uverbs_create_ah_resp resp;
1408 struct ib_uobject *uobj;
1409 struct ib_pd *pd;
1410 struct ib_ah *ah;
1411 struct ib_ah_attr attr;
1412 int ret;
1413
1414 if (out_len < sizeof resp)
1415 return -ENOSPC;
1416
1417 if (copy_from_user(&cmd, buf, sizeof cmd))
1418 return -EFAULT;
1419
1420 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1421 if (!uobj)
1422 return -ENOMEM;
1423
1424 down(&ib_uverbs_idr_mutex);
1425
1426 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
1427 if (!pd || pd->uobject->context != file->ucontext) {
1428 ret = -EINVAL;
1429 goto err_up;
1430 }
1431
1432 uobj->user_handle = cmd.user_handle;
1433 uobj->context = file->ucontext;
1434
1435 attr.dlid = cmd.attr.dlid;
1436 attr.sl = cmd.attr.sl;
1437 attr.src_path_bits = cmd.attr.src_path_bits;
1438 attr.static_rate = cmd.attr.static_rate;
1439 attr.port_num = cmd.attr.port_num;
1440 attr.grh.flow_label = cmd.attr.grh.flow_label;
1441 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
1442 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
1443 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1444 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1445
1446 ah = ib_create_ah(pd, &attr);
1447 if (IS_ERR(ah)) {
1448 ret = PTR_ERR(ah);
1449 goto err_up;
1450 }
1451
1452 ah->uobject = uobj;
1453
1454retry:
1455 if (!idr_pre_get(&ib_uverbs_ah_idr, GFP_KERNEL)) {
1456 ret = -ENOMEM;
1457 goto err_destroy;
1458 }
1459
1460 ret = idr_get_new(&ib_uverbs_ah_idr, ah, &uobj->id);
1461
1462 if (ret == -EAGAIN)
1463 goto retry;
1464 if (ret)
1465 goto err_destroy;
1466
1467 resp.ah_handle = uobj->id;
1468
1469 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1470 &resp, sizeof resp)) {
1471 ret = -EFAULT;
1472 goto err_idr;
1473 }
1474
1475 down(&file->mutex);
1476 list_add_tail(&uobj->list, &file->ucontext->ah_list);
1477 up(&file->mutex);
1478
1479 up(&ib_uverbs_idr_mutex);
1480
1481 return in_len;
1482
1483err_idr:
1484 idr_remove(&ib_uverbs_ah_idr, uobj->id);
1485
1486err_destroy:
1487 ib_destroy_ah(ah);
1488
1489err_up:
1490 up(&ib_uverbs_idr_mutex);
1491
1492 kfree(uobj);
1493 return ret;
1494}
1495
1496ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1497 const char __user *buf, int in_len, int out_len)
1498{
1499 struct ib_uverbs_destroy_ah cmd;
1500 struct ib_ah *ah;
1501 struct ib_uobject *uobj;
1502 int ret = -EINVAL;
1503
1504 if (copy_from_user(&cmd, buf, sizeof cmd))
1505 return -EFAULT;
1506
1507 down(&ib_uverbs_idr_mutex);
1508
1509 ah = idr_find(&ib_uverbs_ah_idr, cmd.ah_handle);
1510 if (!ah || ah->uobject->context != file->ucontext)
1511 goto out;
1512
1513 uobj = ah->uobject;
1514
1515 ret = ib_destroy_ah(ah);
1516 if (ret)
1517 goto out;
1518
1519 idr_remove(&ib_uverbs_ah_idr, cmd.ah_handle);
1520
1521 down(&file->mutex);
1522 list_del(&uobj->list);
1523 up(&file->mutex);
1524
1525 kfree(uobj);
1526
1527out:
1528 up(&ib_uverbs_idr_mutex);
1529
1530 return ret ? ret : in_len;
1531}
1532
bc38a6ab
RD		 1533ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1534 const char __user *buf, int in_len,
1535 int out_len)
1536{
1537 struct ib_uverbs_attach_mcast cmd;
1538 struct ib_qp *qp;
1539 int ret = -EINVAL;
1540
1541 if (copy_from_user(&cmd, buf, sizeof cmd))
1542 return -EFAULT;
1543
1544 down(&ib_uverbs_idr_mutex);
1545
1546 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1547 if (qp && qp->uobject->context == file->ucontext)
1548 ret = ib_attach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1549
1550 up(&ib_uverbs_idr_mutex);
1551
1552 return ret ? ret : in_len;
1553}
1554
1555ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1556 const char __user *buf, int in_len,
1557 int out_len)
1558{
1559 struct ib_uverbs_detach_mcast cmd;
1560 struct ib_qp *qp;
1561 int ret = -EINVAL;
1562
1563 if (copy_from_user(&cmd, buf, sizeof cmd))
1564 return -EFAULT;
1565
1566 down(&ib_uverbs_idr_mutex);
1567
1568 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1569 if (qp && qp->uobject->context == file->ucontext)
1570 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1571
1572 up(&ib_uverbs_idr_mutex);
1573
1574 return ret ? ret : in_len;
1575}
f520ba5a
RD		 1576
1577ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1578 const char __user *buf, int in_len,
1579 int out_len)
1580{
1581 struct ib_uverbs_create_srq cmd;
1582 struct ib_uverbs_create_srq_resp resp;
1583 struct ib_udata udata;
63aaf647 1584 struct ib_uevent_object *uobj;
f520ba5a
RD		 1585 struct ib_pd *pd;
1586 struct ib_srq *srq;
1587 struct ib_srq_init_attr attr;
1588 int ret;
1589
1590 if (out_len < sizeof resp)
1591 return -ENOSPC;
1592
1593 if (copy_from_user(&cmd, buf, sizeof cmd))
1594 return -EFAULT;
1595
1596 INIT_UDATA(&udata, buf + sizeof cmd,
1597 (unsigned long) cmd.response + sizeof resp,
1598 in_len - sizeof cmd, out_len - sizeof resp);
1599
1600 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1601 if (!uobj)
1602 return -ENOMEM;
1603
1604 down(&ib_uverbs_idr_mutex);
1605
1606 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
1607
1608 if (!pd || pd->uobject->context != file->ucontext) {
1609 ret = -EINVAL;
1610 goto err_up;
1611 }
1612
1613 attr.event_handler = ib_uverbs_srq_event_handler;
1614 attr.srq_context = file;
1615 attr.attr.max_wr = cmd.max_wr;
1616 attr.attr.max_sge = cmd.max_sge;
1617 attr.attr.srq_limit = cmd.srq_limit;
1618
63aaf647
RD		 1619 uobj->uobject.user_handle = cmd.user_handle;
1620 uobj->uobject.context = file->ucontext;
1621 uobj->events_reported = 0;
1622 INIT_LIST_HEAD(&uobj->event_list);
f520ba5a
RD		 1623
1624 srq = pd->device->create_srq(pd, &attr, &udata);
1625 if (IS_ERR(srq)) {
1626 ret = PTR_ERR(srq);
1627 goto err_up;
1628 }
1629
1630 srq->device = pd->device;
1631 srq->pd = pd;
63aaf647 1632 srq->uobject = &uobj->uobject;
f520ba5a
RD		 1633 srq->event_handler = attr.event_handler;
1634 srq->srq_context = attr.srq_context;
1635 atomic_inc(&pd->usecnt);
1636 atomic_set(&srq->usecnt, 0);
1637
1638 memset(&resp, 0, sizeof resp);
1639
1640retry:
1641 if (!idr_pre_get(&ib_uverbs_srq_idr, GFP_KERNEL)) {
1642 ret = -ENOMEM;
1643 goto err_destroy;
1644 }
1645
63aaf647 1646 ret = idr_get_new(&ib_uverbs_srq_idr, srq, &uobj->uobject.id);
f520ba5a
RD		 1647
1648 if (ret == -EAGAIN)
1649 goto retry;
1650 if (ret)
1651 goto err_destroy;
1652
63aaf647 1653 resp.srq_handle = uobj->uobject.id;
f520ba5a 1654
f520ba5a
RD		 1655 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1656 &resp, sizeof resp)) {
1657 ret = -EFAULT;
eb9d3cd5 1658 goto err_idr;
f520ba5a
RD		 1659 }
1660
eb9d3cd5
RD		 1661 down(&file->mutex);
1662 list_add_tail(&uobj->uobject.list, &file->ucontext->srq_list);
1663 up(&file->mutex);
1664
f520ba5a
RD		 1665 up(&ib_uverbs_idr_mutex);
1666
1667 return in_len;
1668
eb9d3cd5
RD		 1669err_idr:
1670 idr_remove(&ib_uverbs_srq_idr, uobj->uobject.id);
f520ba5a
RD		 1671
1672err_destroy:
1673 ib_destroy_srq(srq);
1674
1675err_up:
1676 up(&ib_uverbs_idr_mutex);
1677
1678 kfree(uobj);
1679 return ret;
1680}
1681
1682ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
1683 const char __user *buf, int in_len,
1684 int out_len)
1685{
1686 struct ib_uverbs_modify_srq cmd;
1687 struct ib_srq *srq;
1688 struct ib_srq_attr attr;
1689 int ret;
1690
1691 if (copy_from_user(&cmd, buf, sizeof cmd))
1692 return -EFAULT;
1693
1694 down(&ib_uverbs_idr_mutex);
1695
1696 srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1697 if (!srq || srq->uobject->context != file->ucontext) {
1698 ret = -EINVAL;
1699 goto out;
1700 }
1701
1702 attr.max_wr = cmd.max_wr;
1703 attr.max_sge = cmd.max_sge;
1704 attr.srq_limit = cmd.srq_limit;
1705
1706 ret = ib_modify_srq(srq, &attr, cmd.attr_mask);
1707
1708out:
1709 up(&ib_uverbs_idr_mutex);
1710
1711 return ret ? ret : in_len;
1712}
1713
1714ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
1715 const char __user *buf, int in_len,
1716 int out_len)
1717{
63aaf647
RD		 1718 struct ib_uverbs_destroy_srq cmd;
1719 struct ib_uverbs_destroy_srq_resp resp;
1720 struct ib_srq *srq;
1721 struct ib_uevent_object *uobj;
63aaf647 1722 int ret = -EINVAL;
f520ba5a
RD		 1723
1724 if (copy_from_user(&cmd, buf, sizeof cmd))
1725 return -EFAULT;
1726
1727 down(&ib_uverbs_idr_mutex);
1728
63aaf647
RD		 1729 memset(&resp, 0, sizeof resp);
1730
f520ba5a
RD		 1731 srq = idr_find(&ib_uverbs_srq_idr, cmd.srq_handle);
1732 if (!srq || srq->uobject->context != file->ucontext)
1733 goto out;
1734
63aaf647 1735 uobj = container_of(srq->uobject, struct ib_uevent_object, uobject);
f520ba5a
RD		 1736
1737 ret = ib_destroy_srq(srq);
1738 if (ret)
1739 goto out;
1740
1741 idr_remove(&ib_uverbs_srq_idr, cmd.srq_handle);
1742
63c47c28 1743 down(&file->mutex);
63aaf647 1744 list_del(&uobj->uobject.list);
63c47c28 1745 up(&file->mutex);
f520ba5a 1746
70a30e16 1747 ib_uverbs_release_uevent(file, uobj);
63aaf647
RD		 1748
1749 resp.events_reported = uobj->events_reported;
1750
f520ba5a
RD		 1751 kfree(uobj);
1752
63aaf647
RD		 1753 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1754 &resp, sizeof resp))
1755 ret = -EFAULT;
1756
f520ba5a
RD		 1757out:
1758 up(&ib_uverbs_idr_mutex);
1759
1760 return ret ? ret : in_len;
1761}
Linux kernel - Deliverables
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