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/home/lenb/src/to-linus branch 'acpi-2.6.12'
[deliverable/linux.git] / drivers / infiniband / core / uverbs_cmd.c
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Cisco Systems. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 *
33 * $Id: uverbs_cmd.c 2708 2005-06-24 17:27:21Z roland $
34 */
35
36 #include <asm/uaccess.h>
37
38 #include "uverbs.h"
39
40 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
41 do { \
42 (udata)->inbuf = (void __user *) (ibuf); \
43 (udata)->outbuf = (void __user *) (obuf); \
44 (udata)->inlen = (ilen); \
45 (udata)->outlen = (olen); \
46 } while (0)
47
48 ssize_t ib_uverbs_query_params(struct ib_uverbs_file *file,
49 const char __user *buf,
50 int in_len, int out_len)
51 {
52 struct ib_uverbs_query_params cmd;
53 struct ib_uverbs_query_params_resp resp;
54
55 if (out_len < sizeof resp)
56 return -ENOSPC;
57
58 if (copy_from_user(&cmd, buf, sizeof cmd))
59 return -EFAULT;
60
61 memset(&resp, 0, sizeof resp);
62
63 resp.num_cq_events = file->device->num_comp;
64
65 if (copy_to_user((void __user *) (unsigned long) cmd.response, &resp, sizeof resp))
66 return -EFAULT;
67
68 return in_len;
69 }
70
71 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
72 const char __user *buf,
73 int in_len, int out_len)
74 {
75 struct ib_uverbs_get_context cmd;
76 struct ib_uverbs_get_context_resp resp;
77 struct ib_udata udata;
78 struct ib_device *ibdev = file->device->ib_dev;
79 int i;
80 int ret = in_len;
81
82 if (out_len < sizeof resp)
83 return -ENOSPC;
84
85 if (copy_from_user(&cmd, buf, sizeof cmd))
86 return -EFAULT;
87
88 INIT_UDATA(&udata, buf + sizeof cmd,
89 (unsigned long) cmd.response + sizeof resp,
90 in_len - sizeof cmd, out_len - sizeof resp);
91
92 file->ucontext = ibdev->alloc_ucontext(ibdev, &udata);
93 if (IS_ERR(file->ucontext)) {
94 ret = PTR_ERR(file->ucontext);
95 file->ucontext = NULL;
96 return ret;
97 }
98
99 file->ucontext->device = ibdev;
100 INIT_LIST_HEAD(&file->ucontext->pd_list);
101 INIT_LIST_HEAD(&file->ucontext->mr_list);
102 INIT_LIST_HEAD(&file->ucontext->mw_list);
103 INIT_LIST_HEAD(&file->ucontext->cq_list);
104 INIT_LIST_HEAD(&file->ucontext->qp_list);
105 INIT_LIST_HEAD(&file->ucontext->srq_list);
106 INIT_LIST_HEAD(&file->ucontext->ah_list);
107 spin_lock_init(&file->ucontext->lock);
108
109 resp.async_fd = file->async_file.fd;
110 for (i = 0; i < file->device->num_comp; ++i)
111 if (copy_to_user((void __user *) (unsigned long) cmd.cq_fd_tab +
112 i * sizeof (__u32),
113 &file->comp_file[i].fd, sizeof (__u32)))
114 goto err;
115
116 if (copy_to_user((void __user *) (unsigned long) cmd.response,
117 &resp, sizeof resp))
118 goto err;
119
120 return in_len;
121
122 err:
123 ibdev->dealloc_ucontext(file->ucontext);
124 file->ucontext = NULL;
125
126 return -EFAULT;
127 }
128
129 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
130 const char __user *buf,
131 int in_len, int out_len)
132 {
133 struct ib_uverbs_query_device cmd;
134 struct ib_uverbs_query_device_resp resp;
135 struct ib_device_attr attr;
136 int ret;
137
138 if (out_len < sizeof resp)
139 return -ENOSPC;
140
141 if (copy_from_user(&cmd, buf, sizeof cmd))
142 return -EFAULT;
143
144 ret = ib_query_device(file->device->ib_dev, &attr);
145 if (ret)
146 return ret;
147
148 memset(&resp, 0, sizeof resp);
149
150 resp.fw_ver = attr.fw_ver;
151 resp.node_guid = attr.node_guid;
152 resp.sys_image_guid = attr.sys_image_guid;
153 resp.max_mr_size = attr.max_mr_size;
154 resp.page_size_cap = attr.page_size_cap;
155 resp.vendor_id = attr.vendor_id;
156 resp.vendor_part_id = attr.vendor_part_id;
157 resp.hw_ver = attr.hw_ver;
158 resp.max_qp = attr.max_qp;
159 resp.max_qp_wr = attr.max_qp_wr;
160 resp.device_cap_flags = attr.device_cap_flags;
161 resp.max_sge = attr.max_sge;
162 resp.max_sge_rd = attr.max_sge_rd;
163 resp.max_cq = attr.max_cq;
164 resp.max_cqe = attr.max_cqe;
165 resp.max_mr = attr.max_mr;
166 resp.max_pd = attr.max_pd;
167 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
168 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
169 resp.max_res_rd_atom = attr.max_res_rd_atom;
170 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
171 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
172 resp.atomic_cap = attr.atomic_cap;
173 resp.max_ee = attr.max_ee;
174 resp.max_rdd = attr.max_rdd;
175 resp.max_mw = attr.max_mw;
176 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
177 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
178 resp.max_mcast_grp = attr.max_mcast_grp;
179 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
180 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
181 resp.max_ah = attr.max_ah;
182 resp.max_fmr = attr.max_fmr;
183 resp.max_map_per_fmr = attr.max_map_per_fmr;
184 resp.max_srq = attr.max_srq;
185 resp.max_srq_wr = attr.max_srq_wr;
186 resp.max_srq_sge = attr.max_srq_sge;
187 resp.max_pkeys = attr.max_pkeys;
188 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
189 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
190
191 if (copy_to_user((void __user *) (unsigned long) cmd.response,
192 &resp, sizeof resp))
193 return -EFAULT;
194
195 return in_len;
196 }
197
198 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
199 const char __user *buf,
200 int in_len, int out_len)
201 {
202 struct ib_uverbs_query_port cmd;
203 struct ib_uverbs_query_port_resp resp;
204 struct ib_port_attr attr;
205 int ret;
206
207 if (out_len < sizeof resp)
208 return -ENOSPC;
209
210 if (copy_from_user(&cmd, buf, sizeof cmd))
211 return -EFAULT;
212
213 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
214 if (ret)
215 return ret;
216
217 memset(&resp, 0, sizeof resp);
218
219 resp.state = attr.state;
220 resp.max_mtu = attr.max_mtu;
221 resp.active_mtu = attr.active_mtu;
222 resp.gid_tbl_len = attr.gid_tbl_len;
223 resp.port_cap_flags = attr.port_cap_flags;
224 resp.max_msg_sz = attr.max_msg_sz;
225 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
226 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
227 resp.pkey_tbl_len = attr.pkey_tbl_len;
228 resp.lid = attr.lid;
229 resp.sm_lid = attr.sm_lid;
230 resp.lmc = attr.lmc;
231 resp.max_vl_num = attr.max_vl_num;
232 resp.sm_sl = attr.sm_sl;
233 resp.subnet_timeout = attr.subnet_timeout;
234 resp.init_type_reply = attr.init_type_reply;
235 resp.active_width = attr.active_width;
236 resp.active_speed = attr.active_speed;
237 resp.phys_state = attr.phys_state;
238
239 if (copy_to_user((void __user *) (unsigned long) cmd.response,
240 &resp, sizeof resp))
241 return -EFAULT;
242
243 return in_len;
244 }
245
246 ssize_t ib_uverbs_query_gid(struct ib_uverbs_file *file,
247 const char __user *buf,
248 int in_len, int out_len)
249 {
250 struct ib_uverbs_query_gid cmd;
251 struct ib_uverbs_query_gid_resp resp;
252 int ret;
253
254 if (out_len < sizeof resp)
255 return -ENOSPC;
256
257 if (copy_from_user(&cmd, buf, sizeof cmd))
258 return -EFAULT;
259
260 memset(&resp, 0, sizeof resp);
261
262 ret = ib_query_gid(file->device->ib_dev, cmd.port_num, cmd.index,
263 (union ib_gid *) resp.gid);
264 if (ret)
265 return ret;
266
267 if (copy_to_user((void __user *) (unsigned long) cmd.response,
268 &resp, sizeof resp))
269 return -EFAULT;
270
271 return in_len;
272 }
273
274 ssize_t ib_uverbs_query_pkey(struct ib_uverbs_file *file,
275 const char __user *buf,
276 int in_len, int out_len)
277 {
278 struct ib_uverbs_query_pkey cmd;
279 struct ib_uverbs_query_pkey_resp resp;
280 int ret;
281
282 if (out_len < sizeof resp)
283 return -ENOSPC;
284
285 if (copy_from_user(&cmd, buf, sizeof cmd))
286 return -EFAULT;
287
288 memset(&resp, 0, sizeof resp);
289
290 ret = ib_query_pkey(file->device->ib_dev, cmd.port_num, cmd.index,
291 &resp.pkey);
292 if (ret)
293 return ret;
294
295 if (copy_to_user((void __user *) (unsigned long) cmd.response,
296 &resp, sizeof resp))
297 return -EFAULT;
298
299 return in_len;
300 }
301
302 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
303 const char __user *buf,
304 int in_len, int out_len)
305 {
306 struct ib_uverbs_alloc_pd cmd;
307 struct ib_uverbs_alloc_pd_resp resp;
308 struct ib_udata udata;
309 struct ib_uobject *uobj;
310 struct ib_pd *pd;
311 int ret;
312
313 if (out_len < sizeof resp)
314 return -ENOSPC;
315
316 if (copy_from_user(&cmd, buf, sizeof cmd))
317 return -EFAULT;
318
319 INIT_UDATA(&udata, buf + sizeof cmd,
320 (unsigned long) cmd.response + sizeof resp,
321 in_len - sizeof cmd, out_len - sizeof resp);
322
323 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
324 if (!uobj)
325 return -ENOMEM;
326
327 uobj->context = file->ucontext;
328
329 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
330 file->ucontext, &udata);
331 if (IS_ERR(pd)) {
332 ret = PTR_ERR(pd);
333 goto err;
334 }
335
336 pd->device = file->device->ib_dev;
337 pd->uobject = uobj;
338 atomic_set(&pd->usecnt, 0);
339
340 retry:
341 if (!idr_pre_get(&ib_uverbs_pd_idr, GFP_KERNEL)) {
342 ret = -ENOMEM;
343 goto err_pd;
344 }
345
346 down(&ib_uverbs_idr_mutex);
347 ret = idr_get_new(&ib_uverbs_pd_idr, pd, &uobj->id);
348 up(&ib_uverbs_idr_mutex);
349
350 if (ret == -EAGAIN)
351 goto retry;
352 if (ret)
353 goto err_pd;
354
355 spin_lock_irq(&file->ucontext->lock);
356 list_add_tail(&uobj->list, &file->ucontext->pd_list);
357 spin_unlock_irq(&file->ucontext->lock);
358
359 memset(&resp, 0, sizeof resp);
360 resp.pd_handle = uobj->id;
361
362 if (copy_to_user((void __user *) (unsigned long) cmd.response,
363 &resp, sizeof resp)) {
364 ret = -EFAULT;
365 goto err_list;
366 }
367
368 return in_len;
369
370 err_list:
371 spin_lock_irq(&file->ucontext->lock);
372 list_del(&uobj->list);
373 spin_unlock_irq(&file->ucontext->lock);
374
375 down(&ib_uverbs_idr_mutex);
376 idr_remove(&ib_uverbs_pd_idr, uobj->id);
377 up(&ib_uverbs_idr_mutex);
378
379 err_pd:
380 ib_dealloc_pd(pd);
381
382 err:
383 kfree(uobj);
384 return ret;
385 }
386
387 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
388 const char __user *buf,
389 int in_len, int out_len)
390 {
391 struct ib_uverbs_dealloc_pd cmd;
392 struct ib_pd *pd;
393 struct ib_uobject *uobj;
394 int ret = -EINVAL;
395
396 if (copy_from_user(&cmd, buf, sizeof cmd))
397 return -EFAULT;
398
399 down(&ib_uverbs_idr_mutex);
400
401 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
402 if (!pd || pd->uobject->context != file->ucontext)
403 goto out;
404
405 uobj = pd->uobject;
406
407 ret = ib_dealloc_pd(pd);
408 if (ret)
409 goto out;
410
411 idr_remove(&ib_uverbs_pd_idr, cmd.pd_handle);
412
413 spin_lock_irq(&file->ucontext->lock);
414 list_del(&uobj->list);
415 spin_unlock_irq(&file->ucontext->lock);
416
417 kfree(uobj);
418
419 out:
420 up(&ib_uverbs_idr_mutex);
421
422 return ret ? ret : in_len;
423 }
424
425 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
426 const char __user *buf, int in_len,
427 int out_len)
428 {
429 struct ib_uverbs_reg_mr cmd;
430 struct ib_uverbs_reg_mr_resp resp;
431 struct ib_udata udata;
432 struct ib_umem_object *obj;
433 struct ib_pd *pd;
434 struct ib_mr *mr;
435 int ret;
436
437 if (out_len < sizeof resp)
438 return -ENOSPC;
439
440 if (copy_from_user(&cmd, buf, sizeof cmd))
441 return -EFAULT;
442
443 INIT_UDATA(&udata, buf + sizeof cmd,
444 (unsigned long) cmd.response + sizeof resp,
445 in_len - sizeof cmd, out_len - sizeof resp);
446
447 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
448 return -EINVAL;
449
450 obj = kmalloc(sizeof *obj, GFP_KERNEL);
451 if (!obj)
452 return -ENOMEM;
453
454 obj->uobject.context = file->ucontext;
455
456 /*
457 * We ask for writable memory if any access flags other than
458 * "remote read" are set. "Local write" and "remote write"
459 * obviously require write access. "Remote atomic" can do
460 * things like fetch and add, which will modify memory, and
461 * "MW bind" can change permissions by binding a window.
462 */
463 ret = ib_umem_get(file->device->ib_dev, &obj->umem,
464 (void *) (unsigned long) cmd.start, cmd.length,
465 !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ));
466 if (ret)
467 goto err_free;
468
469 obj->umem.virt_base = cmd.hca_va;
470
471 down(&ib_uverbs_idr_mutex);
472
473 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
474 if (!pd || pd->uobject->context != file->ucontext) {
475 ret = -EINVAL;
476 goto err_up;
477 }
478
479 if (!pd->device->reg_user_mr) {
480 ret = -ENOSYS;
481 goto err_up;
482 }
483
484 mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata);
485 if (IS_ERR(mr)) {
486 ret = PTR_ERR(mr);
487 goto err_up;
488 }
489
490 mr->device = pd->device;
491 mr->pd = pd;
492 mr->uobject = &obj->uobject;
493 atomic_inc(&pd->usecnt);
494 atomic_set(&mr->usecnt, 0);
495
496 memset(&resp, 0, sizeof resp);
497 resp.lkey = mr->lkey;
498 resp.rkey = mr->rkey;
499
500 retry:
501 if (!idr_pre_get(&ib_uverbs_mr_idr, GFP_KERNEL)) {
502 ret = -ENOMEM;
503 goto err_unreg;
504 }
505
506 ret = idr_get_new(&ib_uverbs_mr_idr, mr, &obj->uobject.id);
507
508 if (ret == -EAGAIN)
509 goto retry;
510 if (ret)
511 goto err_unreg;
512
513 resp.mr_handle = obj->uobject.id;
514
515 spin_lock_irq(&file->ucontext->lock);
516 list_add_tail(&obj->uobject.list, &file->ucontext->mr_list);
517 spin_unlock_irq(&file->ucontext->lock);
518
519 if (copy_to_user((void __user *) (unsigned long) cmd.response,
520 &resp, sizeof resp)) {
521 ret = -EFAULT;
522 goto err_list;
523 }
524
525 up(&ib_uverbs_idr_mutex);
526
527 return in_len;
528
529 err_list:
530 spin_lock_irq(&file->ucontext->lock);
531 list_del(&obj->uobject.list);
532 spin_unlock_irq(&file->ucontext->lock);
533
534 err_unreg:
535 ib_dereg_mr(mr);
536
537 err_up:
538 up(&ib_uverbs_idr_mutex);
539
540 ib_umem_release(file->device->ib_dev, &obj->umem);
541
542 err_free:
543 kfree(obj);
544 return ret;
545 }
546
547 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
548 const char __user *buf, int in_len,
549 int out_len)
550 {
551 struct ib_uverbs_dereg_mr cmd;
552 struct ib_mr *mr;
553 struct ib_umem_object *memobj;
554 int ret = -EINVAL;
555
556 if (copy_from_user(&cmd, buf, sizeof cmd))
557 return -EFAULT;
558
559 down(&ib_uverbs_idr_mutex);
560
561 mr = idr_find(&ib_uverbs_mr_idr, cmd.mr_handle);
562 if (!mr || mr->uobject->context != file->ucontext)
563 goto out;
564
565 memobj = container_of(mr->uobject, struct ib_umem_object, uobject);
566
567 ret = ib_dereg_mr(mr);
568 if (ret)
569 goto out;
570
571 idr_remove(&ib_uverbs_mr_idr, cmd.mr_handle);
572
573 spin_lock_irq(&file->ucontext->lock);
574 list_del(&memobj->uobject.list);
575 spin_unlock_irq(&file->ucontext->lock);
576
577 ib_umem_release(file->device->ib_dev, &memobj->umem);
578 kfree(memobj);
579
580 out:
581 up(&ib_uverbs_idr_mutex);
582
583 return ret ? ret : in_len;
584 }
585
586 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
587 const char __user *buf, int in_len,
588 int out_len)
589 {
590 struct ib_uverbs_create_cq cmd;
591 struct ib_uverbs_create_cq_resp resp;
592 struct ib_udata udata;
593 struct ib_uobject *uobj;
594 struct ib_cq *cq;
595 int ret;
596
597 if (out_len < sizeof resp)
598 return -ENOSPC;
599
600 if (copy_from_user(&cmd, buf, sizeof cmd))
601 return -EFAULT;
602
603 INIT_UDATA(&udata, buf + sizeof cmd,
604 (unsigned long) cmd.response + sizeof resp,
605 in_len - sizeof cmd, out_len - sizeof resp);
606
607 if (cmd.event_handler >= file->device->num_comp)
608 return -EINVAL;
609
610 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
611 if (!uobj)
612 return -ENOMEM;
613
614 uobj->user_handle = cmd.user_handle;
615 uobj->context = file->ucontext;
616
617 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
618 file->ucontext, &udata);
619 if (IS_ERR(cq)) {
620 ret = PTR_ERR(cq);
621 goto err;
622 }
623
624 cq->device = file->device->ib_dev;
625 cq->uobject = uobj;
626 cq->comp_handler = ib_uverbs_comp_handler;
627 cq->event_handler = ib_uverbs_cq_event_handler;
628 cq->cq_context = file;
629 atomic_set(&cq->usecnt, 0);
630
631 retry:
632 if (!idr_pre_get(&ib_uverbs_cq_idr, GFP_KERNEL)) {
633 ret = -ENOMEM;
634 goto err_cq;
635 }
636
637 down(&ib_uverbs_idr_mutex);
638 ret = idr_get_new(&ib_uverbs_cq_idr, cq, &uobj->id);
639 up(&ib_uverbs_idr_mutex);
640
641 if (ret == -EAGAIN)
642 goto retry;
643 if (ret)
644 goto err_cq;
645
646 spin_lock_irq(&file->ucontext->lock);
647 list_add_tail(&uobj->list, &file->ucontext->cq_list);
648 spin_unlock_irq(&file->ucontext->lock);
649
650 memset(&resp, 0, sizeof resp);
651 resp.cq_handle = uobj->id;
652 resp.cqe = cq->cqe;
653
654 if (copy_to_user((void __user *) (unsigned long) cmd.response,
655 &resp, sizeof resp)) {
656 ret = -EFAULT;
657 goto err_list;
658 }
659
660 return in_len;
661
662 err_list:
663 spin_lock_irq(&file->ucontext->lock);
664 list_del(&uobj->list);
665 spin_unlock_irq(&file->ucontext->lock);
666
667 down(&ib_uverbs_idr_mutex);
668 idr_remove(&ib_uverbs_cq_idr, uobj->id);
669 up(&ib_uverbs_idr_mutex);
670
671 err_cq:
672 ib_destroy_cq(cq);
673
674 err:
675 kfree(uobj);
676 return ret;
677 }
678
679 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
680 const char __user *buf, int in_len,
681 int out_len)
682 {
683 struct ib_uverbs_destroy_cq cmd;
684 struct ib_cq *cq;
685 struct ib_uobject *uobj;
686 int ret = -EINVAL;
687
688 if (copy_from_user(&cmd, buf, sizeof cmd))
689 return -EFAULT;
690
691 down(&ib_uverbs_idr_mutex);
692
693 cq = idr_find(&ib_uverbs_cq_idr, cmd.cq_handle);
694 if (!cq || cq->uobject->context != file->ucontext)
695 goto out;
696
697 uobj = cq->uobject;
698
699 ret = ib_destroy_cq(cq);
700 if (ret)
701 goto out;
702
703 idr_remove(&ib_uverbs_cq_idr, cmd.cq_handle);
704
705 spin_lock_irq(&file->ucontext->lock);
706 list_del(&uobj->list);
707 spin_unlock_irq(&file->ucontext->lock);
708
709 kfree(uobj);
710
711 out:
712 up(&ib_uverbs_idr_mutex);
713
714 return ret ? ret : in_len;
715 }
716
717 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
718 const char __user *buf, int in_len,
719 int out_len)
720 {
721 struct ib_uverbs_create_qp cmd;
722 struct ib_uverbs_create_qp_resp resp;
723 struct ib_udata udata;
724 struct ib_uobject *uobj;
725 struct ib_pd *pd;
726 struct ib_cq *scq, *rcq;
727 struct ib_qp *qp;
728 struct ib_qp_init_attr attr;
729 int ret;
730
731 if (out_len < sizeof resp)
732 return -ENOSPC;
733
734 if (copy_from_user(&cmd, buf, sizeof cmd))
735 return -EFAULT;
736
737 INIT_UDATA(&udata, buf + sizeof cmd,
738 (unsigned long) cmd.response + sizeof resp,
739 in_len - sizeof cmd, out_len - sizeof resp);
740
741 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
742 if (!uobj)
743 return -ENOMEM;
744
745 down(&ib_uverbs_idr_mutex);
746
747 pd = idr_find(&ib_uverbs_pd_idr, cmd.pd_handle);
748 scq = idr_find(&ib_uverbs_cq_idr, cmd.send_cq_handle);
749 rcq = idr_find(&ib_uverbs_cq_idr, cmd.recv_cq_handle);
750
751 if (!pd || pd->uobject->context != file->ucontext ||
752 !scq || scq->uobject->context != file->ucontext ||
753 !rcq || rcq->uobject->context != file->ucontext) {
754 ret = -EINVAL;
755 goto err_up;
756 }
757
758 attr.event_handler = ib_uverbs_qp_event_handler;
759 attr.qp_context = file;
760 attr.send_cq = scq;
761 attr.recv_cq = rcq;
762 attr.srq = NULL;
763 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
764 attr.qp_type = cmd.qp_type;
765
766 attr.cap.max_send_wr = cmd.max_send_wr;
767 attr.cap.max_recv_wr = cmd.max_recv_wr;
768 attr.cap.max_send_sge = cmd.max_send_sge;
769 attr.cap.max_recv_sge = cmd.max_recv_sge;
770 attr.cap.max_inline_data = cmd.max_inline_data;
771
772 uobj->user_handle = cmd.user_handle;
773 uobj->context = file->ucontext;
774
775 qp = pd->device->create_qp(pd, &attr, &udata);
776 if (IS_ERR(qp)) {
777 ret = PTR_ERR(qp);
778 goto err_up;
779 }
780
781 qp->device = pd->device;
782 qp->pd = pd;
783 qp->send_cq = attr.send_cq;
784 qp->recv_cq = attr.recv_cq;
785 qp->srq = attr.srq;
786 qp->uobject = uobj;
787 qp->event_handler = attr.event_handler;
788 qp->qp_context = attr.qp_context;
789 qp->qp_type = attr.qp_type;
790 atomic_inc(&pd->usecnt);
791 atomic_inc(&attr.send_cq->usecnt);
792 atomic_inc(&attr.recv_cq->usecnt);
793 if (attr.srq)
794 atomic_inc(&attr.srq->usecnt);
795
796 memset(&resp, 0, sizeof resp);
797 resp.qpn = qp->qp_num;
798
799 retry:
800 if (!idr_pre_get(&ib_uverbs_qp_idr, GFP_KERNEL)) {
801 ret = -ENOMEM;
802 goto err_destroy;
803 }
804
805 ret = idr_get_new(&ib_uverbs_qp_idr, qp, &uobj->id);
806
807 if (ret == -EAGAIN)
808 goto retry;
809 if (ret)
810 goto err_destroy;
811
812 resp.qp_handle = uobj->id;
813
814 spin_lock_irq(&file->ucontext->lock);
815 list_add_tail(&uobj->list, &file->ucontext->qp_list);
816 spin_unlock_irq(&file->ucontext->lock);
817
818 if (copy_to_user((void __user *) (unsigned long) cmd.response,
819 &resp, sizeof resp)) {
820 ret = -EFAULT;
821 goto err_list;
822 }
823
824 up(&ib_uverbs_idr_mutex);
825
826 return in_len;
827
828 err_list:
829 spin_lock_irq(&file->ucontext->lock);
830 list_del(&uobj->list);
831 spin_unlock_irq(&file->ucontext->lock);
832
833 err_destroy:
834 ib_destroy_qp(qp);
835
836 err_up:
837 up(&ib_uverbs_idr_mutex);
838
839 kfree(uobj);
840 return ret;
841 }
842
843 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
844 const char __user *buf, int in_len,
845 int out_len)
846 {
847 struct ib_uverbs_modify_qp cmd;
848 struct ib_qp *qp;
849 struct ib_qp_attr *attr;
850 int ret;
851
852 if (copy_from_user(&cmd, buf, sizeof cmd))
853 return -EFAULT;
854
855 attr = kmalloc(sizeof *attr, GFP_KERNEL);
856 if (!attr)
857 return -ENOMEM;
858
859 down(&ib_uverbs_idr_mutex);
860
861 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
862 if (!qp || qp->uobject->context != file->ucontext) {
863 ret = -EINVAL;
864 goto out;
865 }
866
867 attr->qp_state = cmd.qp_state;
868 attr->cur_qp_state = cmd.cur_qp_state;
869 attr->path_mtu = cmd.path_mtu;
870 attr->path_mig_state = cmd.path_mig_state;
871 attr->qkey = cmd.qkey;
872 attr->rq_psn = cmd.rq_psn;
873 attr->sq_psn = cmd.sq_psn;
874 attr->dest_qp_num = cmd.dest_qp_num;
875 attr->qp_access_flags = cmd.qp_access_flags;
876 attr->pkey_index = cmd.pkey_index;
877 attr->alt_pkey_index = cmd.pkey_index;
878 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
879 attr->max_rd_atomic = cmd.max_rd_atomic;
880 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
881 attr->min_rnr_timer = cmd.min_rnr_timer;
882 attr->port_num = cmd.port_num;
883 attr->timeout = cmd.timeout;
884 attr->retry_cnt = cmd.retry_cnt;
885 attr->rnr_retry = cmd.rnr_retry;
886 attr->alt_port_num = cmd.alt_port_num;
887 attr->alt_timeout = cmd.alt_timeout;
888
889 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
890 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
891 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
892 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
893 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
894 attr->ah_attr.dlid = cmd.dest.dlid;
895 attr->ah_attr.sl = cmd.dest.sl;
896 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
897 attr->ah_attr.static_rate = cmd.dest.static_rate;
898 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
899 attr->ah_attr.port_num = cmd.dest.port_num;
900
901 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
902 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
903 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
904 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
905 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
906 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
907 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
908 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
909 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
910 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
911 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
912
913 ret = ib_modify_qp(qp, attr, cmd.attr_mask);
914 if (ret)
915 goto out;
916
917 ret = in_len;
918
919 out:
920 up(&ib_uverbs_idr_mutex);
921 kfree(attr);
922
923 return ret;
924 }
925
926 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
927 const char __user *buf, int in_len,
928 int out_len)
929 {
930 struct ib_uverbs_destroy_qp cmd;
931 struct ib_qp *qp;
932 struct ib_uobject *uobj;
933 int ret = -EINVAL;
934
935 if (copy_from_user(&cmd, buf, sizeof cmd))
936 return -EFAULT;
937
938 down(&ib_uverbs_idr_mutex);
939
940 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
941 if (!qp || qp->uobject->context != file->ucontext)
942 goto out;
943
944 uobj = qp->uobject;
945
946 ret = ib_destroy_qp(qp);
947 if (ret)
948 goto out;
949
950 idr_remove(&ib_uverbs_qp_idr, cmd.qp_handle);
951
952 spin_lock_irq(&file->ucontext->lock);
953 list_del(&uobj->list);
954 spin_unlock_irq(&file->ucontext->lock);
955
956 kfree(uobj);
957
958 out:
959 up(&ib_uverbs_idr_mutex);
960
961 return ret ? ret : in_len;
962 }
963
964 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
965 const char __user *buf, int in_len,
966 int out_len)
967 {
968 struct ib_uverbs_attach_mcast cmd;
969 struct ib_qp *qp;
970 int ret = -EINVAL;
971
972 if (copy_from_user(&cmd, buf, sizeof cmd))
973 return -EFAULT;
974
975 down(&ib_uverbs_idr_mutex);
976
977 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
978 if (qp && qp->uobject->context == file->ucontext)
979 ret = ib_attach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
980
981 up(&ib_uverbs_idr_mutex);
982
983 return ret ? ret : in_len;
984 }
985
986 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
987 const char __user *buf, int in_len,
988 int out_len)
989 {
990 struct ib_uverbs_detach_mcast cmd;
991 struct ib_qp *qp;
992 int ret = -EINVAL;
993
994 if (copy_from_user(&cmd, buf, sizeof cmd))
995 return -EFAULT;
996
997 down(&ib_uverbs_idr_mutex);
998
999 qp = idr_find(&ib_uverbs_qp_idr, cmd.qp_handle);
1000 if (qp && qp->uobject->context == file->ucontext)
1001 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1002
1003 up(&ib_uverbs_idr_mutex);
1004
1005 return ret ? ret : in_len;
1006 }
Linux kernel - Deliverables
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