]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - drivers/infiniband/core/uverbs_cmd.c
projects / mirror_ubuntu-zesty-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ASoC: cs42xx8: fix the noise in the right dac channel with mono playback
[mirror_ubuntu-zesty-kernel.git] / drivers / infiniband / core / uverbs_cmd.c
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36 #include <linux/file.h>
37 #include <linux/fs.h>
38 #include <linux/slab.h>
39 #include <linux/sched.h>
40
41 #include <asm/uaccess.h>
42
43 #include "uverbs.h"
44 #include "core_priv.h"
45
46 struct uverbs_lock_class {
47 struct lock_class_key key;
48 char name[16];
49 };
50
51 static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" };
52 static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" };
53 static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" };
54 static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" };
55 static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" };
56 static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" };
57 static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" };
58 static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
59 static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" };
60
61 /*
62 * The ib_uobject locking scheme is as follows:
63 *
64 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
65 * needs to be held during all idr write operations. When an object is
66 * looked up, a reference must be taken on the object's kref before
67 * dropping this lock. For read operations, the rcu_read_lock()
68 * and rcu_write_lock() but similarly the kref reference is grabbed
69 * before the rcu_read_unlock().
70 *
71 * - Each object also has an rwsem. This rwsem must be held for
72 * reading while an operation that uses the object is performed.
73 * For example, while registering an MR, the associated PD's
74 * uobject.mutex must be held for reading. The rwsem must be held
75 * for writing while initializing or destroying an object.
76 *
77 * - In addition, each object has a "live" flag. If this flag is not
78 * set, then lookups of the object will fail even if it is found in
79 * the idr. This handles a reader that blocks and does not acquire
80 * the rwsem until after the object is destroyed. The destroy
81 * operation will set the live flag to 0 and then drop the rwsem;
82 * this will allow the reader to acquire the rwsem, see that the
83 * live flag is 0, and then drop the rwsem and its reference to
84 * object. The underlying storage will not be freed until the last
85 * reference to the object is dropped.
86 */
87
88 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
89 struct ib_ucontext *context, struct uverbs_lock_class *c)
90 {
91 uobj->user_handle = user_handle;
92 uobj->context = context;
93 kref_init(&uobj->ref);
94 init_rwsem(&uobj->mutex);
95 lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
96 uobj->live = 0;
97 }
98
99 static void release_uobj(struct kref *kref)
100 {
101 kfree_rcu(container_of(kref, struct ib_uobject, ref), rcu);
102 }
103
104 static void put_uobj(struct ib_uobject *uobj)
105 {
106 kref_put(&uobj->ref, release_uobj);
107 }
108
109 static void put_uobj_read(struct ib_uobject *uobj)
110 {
111 up_read(&uobj->mutex);
112 put_uobj(uobj);
113 }
114
115 static void put_uobj_write(struct ib_uobject *uobj)
116 {
117 up_write(&uobj->mutex);
118 put_uobj(uobj);
119 }
120
121 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
122 {
123 int ret;
124
125 idr_preload(GFP_KERNEL);
126 spin_lock(&ib_uverbs_idr_lock);
127
128 ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT);
129 if (ret >= 0)
130 uobj->id = ret;
131
132 spin_unlock(&ib_uverbs_idr_lock);
133 idr_preload_end();
134
135 return ret < 0 ? ret : 0;
136 }
137
138 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
139 {
140 spin_lock(&ib_uverbs_idr_lock);
141 idr_remove(idr, uobj->id);
142 spin_unlock(&ib_uverbs_idr_lock);
143 }
144
145 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
146 struct ib_ucontext *context)
147 {
148 struct ib_uobject *uobj;
149
150 rcu_read_lock();
151 uobj = idr_find(idr, id);
152 if (uobj) {
153 if (uobj->context == context)
154 kref_get(&uobj->ref);
155 else
156 uobj = NULL;
157 }
158 rcu_read_unlock();
159
160 return uobj;
161 }
162
163 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
164 struct ib_ucontext *context, int nested)
165 {
166 struct ib_uobject *uobj;
167
168 uobj = __idr_get_uobj(idr, id, context);
169 if (!uobj)
170 return NULL;
171
172 if (nested)
173 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
174 else
175 down_read(&uobj->mutex);
176 if (!uobj->live) {
177 put_uobj_read(uobj);
178 return NULL;
179 }
180
181 return uobj;
182 }
183
184 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
185 struct ib_ucontext *context)
186 {
187 struct ib_uobject *uobj;
188
189 uobj = __idr_get_uobj(idr, id, context);
190 if (!uobj)
191 return NULL;
192
193 down_write(&uobj->mutex);
194 if (!uobj->live) {
195 put_uobj_write(uobj);
196 return NULL;
197 }
198
199 return uobj;
200 }
201
202 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
203 int nested)
204 {
205 struct ib_uobject *uobj;
206
207 uobj = idr_read_uobj(idr, id, context, nested);
208 return uobj ? uobj->object : NULL;
209 }
210
211 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
212 {
213 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
214 }
215
216 static void put_pd_read(struct ib_pd *pd)
217 {
218 put_uobj_read(pd->uobject);
219 }
220
221 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
222 {
223 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
224 }
225
226 static void put_cq_read(struct ib_cq *cq)
227 {
228 put_uobj_read(cq->uobject);
229 }
230
231 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
232 {
233 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
234 }
235
236 static void put_ah_read(struct ib_ah *ah)
237 {
238 put_uobj_read(ah->uobject);
239 }
240
241 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
242 {
243 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
244 }
245
246 static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context)
247 {
248 struct ib_uobject *uobj;
249
250 uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context);
251 return uobj ? uobj->object : NULL;
252 }
253
254 static void put_qp_read(struct ib_qp *qp)
255 {
256 put_uobj_read(qp->uobject);
257 }
258
259 static void put_qp_write(struct ib_qp *qp)
260 {
261 put_uobj_write(qp->uobject);
262 }
263
264 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
265 {
266 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
267 }
268
269 static void put_srq_read(struct ib_srq *srq)
270 {
271 put_uobj_read(srq->uobject);
272 }
273
274 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
275 struct ib_uobject **uobj)
276 {
277 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
278 return *uobj ? (*uobj)->object : NULL;
279 }
280
281 static void put_xrcd_read(struct ib_uobject *uobj)
282 {
283 put_uobj_read(uobj);
284 }
285
286 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
287 struct ib_device *ib_dev,
288 const char __user *buf,
289 int in_len, int out_len)
290 {
291 struct ib_uverbs_get_context cmd;
292 struct ib_uverbs_get_context_resp resp;
293 struct ib_udata udata;
294 struct ib_ucontext *ucontext;
295 struct file *filp;
296 int ret;
297
298 if (out_len < sizeof resp)
299 return -ENOSPC;
300
301 if (copy_from_user(&cmd, buf, sizeof cmd))
302 return -EFAULT;
303
304 mutex_lock(&file->mutex);
305
306 if (file->ucontext) {
307 ret = -EINVAL;
308 goto err;
309 }
310
311 INIT_UDATA(&udata, buf + sizeof cmd,
312 (unsigned long) cmd.response + sizeof resp,
313 in_len - sizeof cmd, out_len - sizeof resp);
314
315 ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
316 if (IS_ERR(ucontext)) {
317 ret = PTR_ERR(ucontext);
318 goto err;
319 }
320
321 ucontext->device = ib_dev;
322 INIT_LIST_HEAD(&ucontext->pd_list);
323 INIT_LIST_HEAD(&ucontext->mr_list);
324 INIT_LIST_HEAD(&ucontext->mw_list);
325 INIT_LIST_HEAD(&ucontext->cq_list);
326 INIT_LIST_HEAD(&ucontext->qp_list);
327 INIT_LIST_HEAD(&ucontext->srq_list);
328 INIT_LIST_HEAD(&ucontext->ah_list);
329 INIT_LIST_HEAD(&ucontext->xrcd_list);
330 INIT_LIST_HEAD(&ucontext->rule_list);
331 rcu_read_lock();
332 ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
333 rcu_read_unlock();
334 ucontext->closing = 0;
335
336 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
337 ucontext->umem_tree = RB_ROOT;
338 init_rwsem(&ucontext->umem_rwsem);
339 ucontext->odp_mrs_count = 0;
340 INIT_LIST_HEAD(&ucontext->no_private_counters);
341
342 if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
343 ucontext->invalidate_range = NULL;
344
345 #endif
346
347 resp.num_comp_vectors = file->device->num_comp_vectors;
348
349 ret = get_unused_fd_flags(O_CLOEXEC);
350 if (ret < 0)
351 goto err_free;
352 resp.async_fd = ret;
353
354 filp = ib_uverbs_alloc_event_file(file, ib_dev, 1);
355 if (IS_ERR(filp)) {
356 ret = PTR_ERR(filp);
357 goto err_fd;
358 }
359
360 if (copy_to_user((void __user *) (unsigned long) cmd.response,
361 &resp, sizeof resp)) {
362 ret = -EFAULT;
363 goto err_file;
364 }
365
366 file->ucontext = ucontext;
367
368 fd_install(resp.async_fd, filp);
369
370 mutex_unlock(&file->mutex);
371
372 return in_len;
373
374 err_file:
375 ib_uverbs_free_async_event_file(file);
376 fput(filp);
377
378 err_fd:
379 put_unused_fd(resp.async_fd);
380
381 err_free:
382 put_pid(ucontext->tgid);
383 ib_dev->dealloc_ucontext(ucontext);
384
385 err:
386 mutex_unlock(&file->mutex);
387 return ret;
388 }
389
390 static void copy_query_dev_fields(struct ib_uverbs_file *file,
391 struct ib_device *ib_dev,
392 struct ib_uverbs_query_device_resp *resp,
393 struct ib_device_attr *attr)
394 {
395 resp->fw_ver = attr->fw_ver;
396 resp->node_guid = ib_dev->node_guid;
397 resp->sys_image_guid = attr->sys_image_guid;
398 resp->max_mr_size = attr->max_mr_size;
399 resp->page_size_cap = attr->page_size_cap;
400 resp->vendor_id = attr->vendor_id;
401 resp->vendor_part_id = attr->vendor_part_id;
402 resp->hw_ver = attr->hw_ver;
403 resp->max_qp = attr->max_qp;
404 resp->max_qp_wr = attr->max_qp_wr;
405 resp->device_cap_flags = attr->device_cap_flags;
406 resp->max_sge = attr->max_sge;
407 resp->max_sge_rd = attr->max_sge_rd;
408 resp->max_cq = attr->max_cq;
409 resp->max_cqe = attr->max_cqe;
410 resp->max_mr = attr->max_mr;
411 resp->max_pd = attr->max_pd;
412 resp->max_qp_rd_atom = attr->max_qp_rd_atom;
413 resp->max_ee_rd_atom = attr->max_ee_rd_atom;
414 resp->max_res_rd_atom = attr->max_res_rd_atom;
415 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom;
416 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom;
417 resp->atomic_cap = attr->atomic_cap;
418 resp->max_ee = attr->max_ee;
419 resp->max_rdd = attr->max_rdd;
420 resp->max_mw = attr->max_mw;
421 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
422 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
423 resp->max_mcast_grp = attr->max_mcast_grp;
424 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
425 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
426 resp->max_ah = attr->max_ah;
427 resp->max_fmr = attr->max_fmr;
428 resp->max_map_per_fmr = attr->max_map_per_fmr;
429 resp->max_srq = attr->max_srq;
430 resp->max_srq_wr = attr->max_srq_wr;
431 resp->max_srq_sge = attr->max_srq_sge;
432 resp->max_pkeys = attr->max_pkeys;
433 resp->local_ca_ack_delay = attr->local_ca_ack_delay;
434 resp->phys_port_cnt = ib_dev->phys_port_cnt;
435 }
436
437 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
438 struct ib_device *ib_dev,
439 const char __user *buf,
440 int in_len, int out_len)
441 {
442 struct ib_uverbs_query_device cmd;
443 struct ib_uverbs_query_device_resp resp;
444
445 if (out_len < sizeof resp)
446 return -ENOSPC;
447
448 if (copy_from_user(&cmd, buf, sizeof cmd))
449 return -EFAULT;
450
451 memset(&resp, 0, sizeof resp);
452 copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs);
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
461 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
462 struct ib_device *ib_dev,
463 const char __user *buf,
464 int in_len, int out_len)
465 {
466 struct ib_uverbs_query_port cmd;
467 struct ib_uverbs_query_port_resp resp;
468 struct ib_port_attr attr;
469 int ret;
470
471 if (out_len < sizeof resp)
472 return -ENOSPC;
473
474 if (copy_from_user(&cmd, buf, sizeof cmd))
475 return -EFAULT;
476
477 ret = ib_query_port(ib_dev, cmd.port_num, &attr);
478 if (ret)
479 return ret;
480
481 memset(&resp, 0, sizeof resp);
482
483 resp.state = attr.state;
484 resp.max_mtu = attr.max_mtu;
485 resp.active_mtu = attr.active_mtu;
486 resp.gid_tbl_len = attr.gid_tbl_len;
487 resp.port_cap_flags = attr.port_cap_flags;
488 resp.max_msg_sz = attr.max_msg_sz;
489 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
490 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
491 resp.pkey_tbl_len = attr.pkey_tbl_len;
492 resp.lid = attr.lid;
493 resp.sm_lid = attr.sm_lid;
494 resp.lmc = attr.lmc;
495 resp.max_vl_num = attr.max_vl_num;
496 resp.sm_sl = attr.sm_sl;
497 resp.subnet_timeout = attr.subnet_timeout;
498 resp.init_type_reply = attr.init_type_reply;
499 resp.active_width = attr.active_width;
500 resp.active_speed = attr.active_speed;
501 resp.phys_state = attr.phys_state;
502 resp.link_layer = rdma_port_get_link_layer(ib_dev,
503 cmd.port_num);
504
505 if (copy_to_user((void __user *) (unsigned long) cmd.response,
506 &resp, sizeof resp))
507 return -EFAULT;
508
509 return in_len;
510 }
511
512 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
513 struct ib_device *ib_dev,
514 const char __user *buf,
515 int in_len, int out_len)
516 {
517 struct ib_uverbs_alloc_pd cmd;
518 struct ib_uverbs_alloc_pd_resp resp;
519 struct ib_udata udata;
520 struct ib_uobject *uobj;
521 struct ib_pd *pd;
522 int ret;
523
524 if (out_len < sizeof resp)
525 return -ENOSPC;
526
527 if (copy_from_user(&cmd, buf, sizeof cmd))
528 return -EFAULT;
529
530 INIT_UDATA(&udata, buf + sizeof cmd,
531 (unsigned long) cmd.response + sizeof resp,
532 in_len - sizeof cmd, out_len - sizeof resp);
533
534 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
535 if (!uobj)
536 return -ENOMEM;
537
538 init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
539 down_write(&uobj->mutex);
540
541 pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
542 if (IS_ERR(pd)) {
543 ret = PTR_ERR(pd);
544 goto err;
545 }
546
547 pd->device = ib_dev;
548 pd->uobject = uobj;
549 pd->local_mr = NULL;
550 atomic_set(&pd->usecnt, 0);
551
552 uobj->object = pd;
553 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
554 if (ret)
555 goto err_idr;
556
557 memset(&resp, 0, sizeof resp);
558 resp.pd_handle = uobj->id;
559
560 if (copy_to_user((void __user *) (unsigned long) cmd.response,
561 &resp, sizeof resp)) {
562 ret = -EFAULT;
563 goto err_copy;
564 }
565
566 mutex_lock(&file->mutex);
567 list_add_tail(&uobj->list, &file->ucontext->pd_list);
568 mutex_unlock(&file->mutex);
569
570 uobj->live = 1;
571
572 up_write(&uobj->mutex);
573
574 return in_len;
575
576 err_copy:
577 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
578
579 err_idr:
580 ib_dealloc_pd(pd);
581
582 err:
583 put_uobj_write(uobj);
584 return ret;
585 }
586
587 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
588 struct ib_device *ib_dev,
589 const char __user *buf,
590 int in_len, int out_len)
591 {
592 struct ib_uverbs_dealloc_pd cmd;
593 struct ib_uobject *uobj;
594 struct ib_pd *pd;
595 int ret;
596
597 if (copy_from_user(&cmd, buf, sizeof cmd))
598 return -EFAULT;
599
600 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
601 if (!uobj)
602 return -EINVAL;
603 pd = uobj->object;
604
605 if (atomic_read(&pd->usecnt)) {
606 ret = -EBUSY;
607 goto err_put;
608 }
609
610 ret = pd->device->dealloc_pd(uobj->object);
611 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
612 if (ret)
613 goto err_put;
614
615 uobj->live = 0;
616 put_uobj_write(uobj);
617
618 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
619
620 mutex_lock(&file->mutex);
621 list_del(&uobj->list);
622 mutex_unlock(&file->mutex);
623
624 put_uobj(uobj);
625
626 return in_len;
627
628 err_put:
629 put_uobj_write(uobj);
630 return ret;
631 }
632
633 struct xrcd_table_entry {
634 struct rb_node node;
635 struct ib_xrcd *xrcd;
636 struct inode *inode;
637 };
638
639 static int xrcd_table_insert(struct ib_uverbs_device *dev,
640 struct inode *inode,
641 struct ib_xrcd *xrcd)
642 {
643 struct xrcd_table_entry *entry, *scan;
644 struct rb_node **p = &dev->xrcd_tree.rb_node;
645 struct rb_node *parent = NULL;
646
647 entry = kmalloc(sizeof *entry, GFP_KERNEL);
648 if (!entry)
649 return -ENOMEM;
650
651 entry->xrcd = xrcd;
652 entry->inode = inode;
653
654 while (*p) {
655 parent = *p;
656 scan = rb_entry(parent, struct xrcd_table_entry, node);
657
658 if (inode < scan->inode) {
659 p = &(*p)->rb_left;
660 } else if (inode > scan->inode) {
661 p = &(*p)->rb_right;
662 } else {
663 kfree(entry);
664 return -EEXIST;
665 }
666 }
667
668 rb_link_node(&entry->node, parent, p);
669 rb_insert_color(&entry->node, &dev->xrcd_tree);
670 igrab(inode);
671 return 0;
672 }
673
674 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
675 struct inode *inode)
676 {
677 struct xrcd_table_entry *entry;
678 struct rb_node *p = dev->xrcd_tree.rb_node;
679
680 while (p) {
681 entry = rb_entry(p, struct xrcd_table_entry, node);
682
683 if (inode < entry->inode)
684 p = p->rb_left;
685 else if (inode > entry->inode)
686 p = p->rb_right;
687 else
688 return entry;
689 }
690
691 return NULL;
692 }
693
694 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
695 {
696 struct xrcd_table_entry *entry;
697
698 entry = xrcd_table_search(dev, inode);
699 if (!entry)
700 return NULL;
701
702 return entry->xrcd;
703 }
704
705 static void xrcd_table_delete(struct ib_uverbs_device *dev,
706 struct inode *inode)
707 {
708 struct xrcd_table_entry *entry;
709
710 entry = xrcd_table_search(dev, inode);
711 if (entry) {
712 iput(inode);
713 rb_erase(&entry->node, &dev->xrcd_tree);
714 kfree(entry);
715 }
716 }
717
718 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
719 struct ib_device *ib_dev,
720 const char __user *buf, int in_len,
721 int out_len)
722 {
723 struct ib_uverbs_open_xrcd cmd;
724 struct ib_uverbs_open_xrcd_resp resp;
725 struct ib_udata udata;
726 struct ib_uxrcd_object *obj;
727 struct ib_xrcd *xrcd = NULL;
728 struct fd f = {NULL, 0};
729 struct inode *inode = NULL;
730 int ret = 0;
731 int new_xrcd = 0;
732
733 if (out_len < sizeof resp)
734 return -ENOSPC;
735
736 if (copy_from_user(&cmd, buf, sizeof cmd))
737 return -EFAULT;
738
739 INIT_UDATA(&udata, buf + sizeof cmd,
740 (unsigned long) cmd.response + sizeof resp,
741 in_len - sizeof cmd, out_len - sizeof resp);
742
743 mutex_lock(&file->device->xrcd_tree_mutex);
744
745 if (cmd.fd != -1) {
746 /* search for file descriptor */
747 f = fdget(cmd.fd);
748 if (!f.file) {
749 ret = -EBADF;
750 goto err_tree_mutex_unlock;
751 }
752
753 inode = file_inode(f.file);
754 xrcd = find_xrcd(file->device, inode);
755 if (!xrcd && !(cmd.oflags & O_CREAT)) {
756 /* no file descriptor. Need CREATE flag */
757 ret = -EAGAIN;
758 goto err_tree_mutex_unlock;
759 }
760
761 if (xrcd && cmd.oflags & O_EXCL) {
762 ret = -EINVAL;
763 goto err_tree_mutex_unlock;
764 }
765 }
766
767 obj = kmalloc(sizeof *obj, GFP_KERNEL);
768 if (!obj) {
769 ret = -ENOMEM;
770 goto err_tree_mutex_unlock;
771 }
772
773 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
774
775 down_write(&obj->uobject.mutex);
776
777 if (!xrcd) {
778 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
779 if (IS_ERR(xrcd)) {
780 ret = PTR_ERR(xrcd);
781 goto err;
782 }
783
784 xrcd->inode = inode;
785 xrcd->device = ib_dev;
786 atomic_set(&xrcd->usecnt, 0);
787 mutex_init(&xrcd->tgt_qp_mutex);
788 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
789 new_xrcd = 1;
790 }
791
792 atomic_set(&obj->refcnt, 0);
793 obj->uobject.object = xrcd;
794 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
795 if (ret)
796 goto err_idr;
797
798 memset(&resp, 0, sizeof resp);
799 resp.xrcd_handle = obj->uobject.id;
800
801 if (inode) {
802 if (new_xrcd) {
803 /* create new inode/xrcd table entry */
804 ret = xrcd_table_insert(file->device, inode, xrcd);
805 if (ret)
806 goto err_insert_xrcd;
807 }
808 atomic_inc(&xrcd->usecnt);
809 }
810
811 if (copy_to_user((void __user *) (unsigned long) cmd.response,
812 &resp, sizeof resp)) {
813 ret = -EFAULT;
814 goto err_copy;
815 }
816
817 if (f.file)
818 fdput(f);
819
820 mutex_lock(&file->mutex);
821 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
822 mutex_unlock(&file->mutex);
823
824 obj->uobject.live = 1;
825 up_write(&obj->uobject.mutex);
826
827 mutex_unlock(&file->device->xrcd_tree_mutex);
828 return in_len;
829
830 err_copy:
831 if (inode) {
832 if (new_xrcd)
833 xrcd_table_delete(file->device, inode);
834 atomic_dec(&xrcd->usecnt);
835 }
836
837 err_insert_xrcd:
838 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
839
840 err_idr:
841 ib_dealloc_xrcd(xrcd);
842
843 err:
844 put_uobj_write(&obj->uobject);
845
846 err_tree_mutex_unlock:
847 if (f.file)
848 fdput(f);
849
850 mutex_unlock(&file->device->xrcd_tree_mutex);
851
852 return ret;
853 }
854
855 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
856 struct ib_device *ib_dev,
857 const char __user *buf, int in_len,
858 int out_len)
859 {
860 struct ib_uverbs_close_xrcd cmd;
861 struct ib_uobject *uobj;
862 struct ib_xrcd *xrcd = NULL;
863 struct inode *inode = NULL;
864 struct ib_uxrcd_object *obj;
865 int live;
866 int ret = 0;
867
868 if (copy_from_user(&cmd, buf, sizeof cmd))
869 return -EFAULT;
870
871 mutex_lock(&file->device->xrcd_tree_mutex);
872 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
873 if (!uobj) {
874 ret = -EINVAL;
875 goto out;
876 }
877
878 xrcd = uobj->object;
879 inode = xrcd->inode;
880 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
881 if (atomic_read(&obj->refcnt)) {
882 put_uobj_write(uobj);
883 ret = -EBUSY;
884 goto out;
885 }
886
887 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
888 ret = ib_dealloc_xrcd(uobj->object);
889 if (!ret)
890 uobj->live = 0;
891 }
892
893 live = uobj->live;
894 if (inode && ret)
895 atomic_inc(&xrcd->usecnt);
896
897 put_uobj_write(uobj);
898
899 if (ret)
900 goto out;
901
902 if (inode && !live)
903 xrcd_table_delete(file->device, inode);
904
905 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
906 mutex_lock(&file->mutex);
907 list_del(&uobj->list);
908 mutex_unlock(&file->mutex);
909
910 put_uobj(uobj);
911 ret = in_len;
912
913 out:
914 mutex_unlock(&file->device->xrcd_tree_mutex);
915 return ret;
916 }
917
918 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
919 struct ib_xrcd *xrcd)
920 {
921 struct inode *inode;
922
923 inode = xrcd->inode;
924 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
925 return;
926
927 ib_dealloc_xrcd(xrcd);
928
929 if (inode)
930 xrcd_table_delete(dev, inode);
931 }
932
933 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
934 struct ib_device *ib_dev,
935 const char __user *buf, int in_len,
936 int out_len)
937 {
938 struct ib_uverbs_reg_mr cmd;
939 struct ib_uverbs_reg_mr_resp resp;
940 struct ib_udata udata;
941 struct ib_uobject *uobj;
942 struct ib_pd *pd;
943 struct ib_mr *mr;
944 int ret;
945
946 if (out_len < sizeof resp)
947 return -ENOSPC;
948
949 if (copy_from_user(&cmd, buf, sizeof cmd))
950 return -EFAULT;
951
952 INIT_UDATA(&udata, buf + sizeof cmd,
953 (unsigned long) cmd.response + sizeof resp,
954 in_len - sizeof cmd, out_len - sizeof resp);
955
956 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
957 return -EINVAL;
958
959 ret = ib_check_mr_access(cmd.access_flags);
960 if (ret)
961 return ret;
962
963 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
964 if (!uobj)
965 return -ENOMEM;
966
967 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
968 down_write(&uobj->mutex);
969
970 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
971 if (!pd) {
972 ret = -EINVAL;
973 goto err_free;
974 }
975
976 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
977 if (!(pd->device->attrs.device_cap_flags &
978 IB_DEVICE_ON_DEMAND_PAGING)) {
979 pr_debug("ODP support not available\n");
980 ret = -EINVAL;
981 goto err_put;
982 }
983 }
984
985 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
986 cmd.access_flags, &udata);
987 if (IS_ERR(mr)) {
988 ret = PTR_ERR(mr);
989 goto err_put;
990 }
991
992 mr->device = pd->device;
993 mr->pd = pd;
994 mr->uobject = uobj;
995 atomic_inc(&pd->usecnt);
996
997 uobj->object = mr;
998 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
999 if (ret)
1000 goto err_unreg;
1001
1002 memset(&resp, 0, sizeof resp);
1003 resp.lkey = mr->lkey;
1004 resp.rkey = mr->rkey;
1005 resp.mr_handle = uobj->id;
1006
1007 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1008 &resp, sizeof resp)) {
1009 ret = -EFAULT;
1010 goto err_copy;
1011 }
1012
1013 put_pd_read(pd);
1014
1015 mutex_lock(&file->mutex);
1016 list_add_tail(&uobj->list, &file->ucontext->mr_list);
1017 mutex_unlock(&file->mutex);
1018
1019 uobj->live = 1;
1020
1021 up_write(&uobj->mutex);
1022
1023 return in_len;
1024
1025 err_copy:
1026 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1027
1028 err_unreg:
1029 ib_dereg_mr(mr);
1030
1031 err_put:
1032 put_pd_read(pd);
1033
1034 err_free:
1035 put_uobj_write(uobj);
1036 return ret;
1037 }
1038
1039 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
1040 struct ib_device *ib_dev,
1041 const char __user *buf, int in_len,
1042 int out_len)
1043 {
1044 struct ib_uverbs_rereg_mr cmd;
1045 struct ib_uverbs_rereg_mr_resp resp;
1046 struct ib_udata udata;
1047 struct ib_pd *pd = NULL;
1048 struct ib_mr *mr;
1049 struct ib_pd *old_pd;
1050 int ret;
1051 struct ib_uobject *uobj;
1052
1053 if (out_len < sizeof(resp))
1054 return -ENOSPC;
1055
1056 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1057 return -EFAULT;
1058
1059 INIT_UDATA(&udata, buf + sizeof(cmd),
1060 (unsigned long) cmd.response + sizeof(resp),
1061 in_len - sizeof(cmd), out_len - sizeof(resp));
1062
1063 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
1064 return -EINVAL;
1065
1066 if ((cmd.flags & IB_MR_REREG_TRANS) &&
1067 (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
1068 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
1069 return -EINVAL;
1070
1071 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle,
1072 file->ucontext);
1073
1074 if (!uobj)
1075 return -EINVAL;
1076
1077 mr = uobj->object;
1078
1079 if (cmd.flags & IB_MR_REREG_ACCESS) {
1080 ret = ib_check_mr_access(cmd.access_flags);
1081 if (ret)
1082 goto put_uobjs;
1083 }
1084
1085 if (cmd.flags & IB_MR_REREG_PD) {
1086 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1087 if (!pd) {
1088 ret = -EINVAL;
1089 goto put_uobjs;
1090 }
1091 }
1092
1093 old_pd = mr->pd;
1094 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
1095 cmd.length, cmd.hca_va,
1096 cmd.access_flags, pd, &udata);
1097 if (!ret) {
1098 if (cmd.flags & IB_MR_REREG_PD) {
1099 atomic_inc(&pd->usecnt);
1100 mr->pd = pd;
1101 atomic_dec(&old_pd->usecnt);
1102 }
1103 } else {
1104 goto put_uobj_pd;
1105 }
1106
1107 memset(&resp, 0, sizeof(resp));
1108 resp.lkey = mr->lkey;
1109 resp.rkey = mr->rkey;
1110
1111 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1112 &resp, sizeof(resp)))
1113 ret = -EFAULT;
1114 else
1115 ret = in_len;
1116
1117 put_uobj_pd:
1118 if (cmd.flags & IB_MR_REREG_PD)
1119 put_pd_read(pd);
1120
1121 put_uobjs:
1122
1123 put_uobj_write(mr->uobject);
1124
1125 return ret;
1126 }
1127
1128 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1129 struct ib_device *ib_dev,
1130 const char __user *buf, int in_len,
1131 int out_len)
1132 {
1133 struct ib_uverbs_dereg_mr cmd;
1134 struct ib_mr *mr;
1135 struct ib_uobject *uobj;
1136 int ret = -EINVAL;
1137
1138 if (copy_from_user(&cmd, buf, sizeof cmd))
1139 return -EFAULT;
1140
1141 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1142 if (!uobj)
1143 return -EINVAL;
1144
1145 mr = uobj->object;
1146
1147 ret = ib_dereg_mr(mr);
1148 if (!ret)
1149 uobj->live = 0;
1150
1151 put_uobj_write(uobj);
1152
1153 if (ret)
1154 return ret;
1155
1156 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1157
1158 mutex_lock(&file->mutex);
1159 list_del(&uobj->list);
1160 mutex_unlock(&file->mutex);
1161
1162 put_uobj(uobj);
1163
1164 return in_len;
1165 }
1166
1167 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
1168 struct ib_device *ib_dev,
1169 const char __user *buf, int in_len,
1170 int out_len)
1171 {
1172 struct ib_uverbs_alloc_mw cmd;
1173 struct ib_uverbs_alloc_mw_resp resp;
1174 struct ib_uobject *uobj;
1175 struct ib_pd *pd;
1176 struct ib_mw *mw;
1177 int ret;
1178
1179 if (out_len < sizeof(resp))
1180 return -ENOSPC;
1181
1182 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1183 return -EFAULT;
1184
1185 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
1186 if (!uobj)
1187 return -ENOMEM;
1188
1189 init_uobj(uobj, 0, file->ucontext, &mw_lock_class);
1190 down_write(&uobj->mutex);
1191
1192 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1193 if (!pd) {
1194 ret = -EINVAL;
1195 goto err_free;
1196 }
1197
1198 mw = pd->device->alloc_mw(pd, cmd.mw_type);
1199 if (IS_ERR(mw)) {
1200 ret = PTR_ERR(mw);
1201 goto err_put;
1202 }
1203
1204 mw->device = pd->device;
1205 mw->pd = pd;
1206 mw->uobject = uobj;
1207 atomic_inc(&pd->usecnt);
1208
1209 uobj->object = mw;
1210 ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj);
1211 if (ret)
1212 goto err_unalloc;
1213
1214 memset(&resp, 0, sizeof(resp));
1215 resp.rkey = mw->rkey;
1216 resp.mw_handle = uobj->id;
1217
1218 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1219 &resp, sizeof(resp))) {
1220 ret = -EFAULT;
1221 goto err_copy;
1222 }
1223
1224 put_pd_read(pd);
1225
1226 mutex_lock(&file->mutex);
1227 list_add_tail(&uobj->list, &file->ucontext->mw_list);
1228 mutex_unlock(&file->mutex);
1229
1230 uobj->live = 1;
1231
1232 up_write(&uobj->mutex);
1233
1234 return in_len;
1235
1236 err_copy:
1237 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1238
1239 err_unalloc:
1240 uverbs_dealloc_mw(mw);
1241
1242 err_put:
1243 put_pd_read(pd);
1244
1245 err_free:
1246 put_uobj_write(uobj);
1247 return ret;
1248 }
1249
1250 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
1251 struct ib_device *ib_dev,
1252 const char __user *buf, int in_len,
1253 int out_len)
1254 {
1255 struct ib_uverbs_dealloc_mw cmd;
1256 struct ib_mw *mw;
1257 struct ib_uobject *uobj;
1258 int ret = -EINVAL;
1259
1260 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1261 return -EFAULT;
1262
1263 uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext);
1264 if (!uobj)
1265 return -EINVAL;
1266
1267 mw = uobj->object;
1268
1269 ret = uverbs_dealloc_mw(mw);
1270 if (!ret)
1271 uobj->live = 0;
1272
1273 put_uobj_write(uobj);
1274
1275 if (ret)
1276 return ret;
1277
1278 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1279
1280 mutex_lock(&file->mutex);
1281 list_del(&uobj->list);
1282 mutex_unlock(&file->mutex);
1283
1284 put_uobj(uobj);
1285
1286 return in_len;
1287 }
1288
1289 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1290 struct ib_device *ib_dev,
1291 const char __user *buf, int in_len,
1292 int out_len)
1293 {
1294 struct ib_uverbs_create_comp_channel cmd;
1295 struct ib_uverbs_create_comp_channel_resp resp;
1296 struct file *filp;
1297 int ret;
1298
1299 if (out_len < sizeof resp)
1300 return -ENOSPC;
1301
1302 if (copy_from_user(&cmd, buf, sizeof cmd))
1303 return -EFAULT;
1304
1305 ret = get_unused_fd_flags(O_CLOEXEC);
1306 if (ret < 0)
1307 return ret;
1308 resp.fd = ret;
1309
1310 filp = ib_uverbs_alloc_event_file(file, ib_dev, 0);
1311 if (IS_ERR(filp)) {
1312 put_unused_fd(resp.fd);
1313 return PTR_ERR(filp);
1314 }
1315
1316 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1317 &resp, sizeof resp)) {
1318 put_unused_fd(resp.fd);
1319 fput(filp);
1320 return -EFAULT;
1321 }
1322
1323 fd_install(resp.fd, filp);
1324 return in_len;
1325 }
1326
1327 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
1328 struct ib_device *ib_dev,
1329 struct ib_udata *ucore,
1330 struct ib_udata *uhw,
1331 struct ib_uverbs_ex_create_cq *cmd,
1332 size_t cmd_sz,
1333 int (*cb)(struct ib_uverbs_file *file,
1334 struct ib_ucq_object *obj,
1335 struct ib_uverbs_ex_create_cq_resp *resp,
1336 struct ib_udata *udata,
1337 void *context),
1338 void *context)
1339 {
1340 struct ib_ucq_object *obj;
1341 struct ib_uverbs_event_file *ev_file = NULL;
1342 struct ib_cq *cq;
1343 int ret;
1344 struct ib_uverbs_ex_create_cq_resp resp;
1345 struct ib_cq_init_attr attr = {};
1346
1347 if (cmd->comp_vector >= file->device->num_comp_vectors)
1348 return ERR_PTR(-EINVAL);
1349
1350 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1351 if (!obj)
1352 return ERR_PTR(-ENOMEM);
1353
1354 init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class);
1355 down_write(&obj->uobject.mutex);
1356
1357 if (cmd->comp_channel >= 0) {
1358 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel);
1359 if (!ev_file) {
1360 ret = -EINVAL;
1361 goto err;
1362 }
1363 }
1364
1365 obj->uverbs_file = file;
1366 obj->comp_events_reported = 0;
1367 obj->async_events_reported = 0;
1368 INIT_LIST_HEAD(&obj->comp_list);
1369 INIT_LIST_HEAD(&obj->async_list);
1370
1371 attr.cqe = cmd->cqe;
1372 attr.comp_vector = cmd->comp_vector;
1373
1374 if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1375 attr.flags = cmd->flags;
1376
1377 cq = ib_dev->create_cq(ib_dev, &attr,
1378 file->ucontext, uhw);
1379 if (IS_ERR(cq)) {
1380 ret = PTR_ERR(cq);
1381 goto err_file;
1382 }
1383
1384 cq->device = ib_dev;
1385 cq->uobject = &obj->uobject;
1386 cq->comp_handler = ib_uverbs_comp_handler;
1387 cq->event_handler = ib_uverbs_cq_event_handler;
1388 cq->cq_context = ev_file;
1389 atomic_set(&cq->usecnt, 0);
1390
1391 obj->uobject.object = cq;
1392 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1393 if (ret)
1394 goto err_free;
1395
1396 memset(&resp, 0, sizeof resp);
1397 resp.base.cq_handle = obj->uobject.id;
1398 resp.base.cqe = cq->cqe;
1399
1400 resp.response_length = offsetof(typeof(resp), response_length) +
1401 sizeof(resp.response_length);
1402
1403 ret = cb(file, obj, &resp, ucore, context);
1404 if (ret)
1405 goto err_cb;
1406
1407 mutex_lock(&file->mutex);
1408 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1409 mutex_unlock(&file->mutex);
1410
1411 obj->uobject.live = 1;
1412
1413 up_write(&obj->uobject.mutex);
1414
1415 return obj;
1416
1417 err_cb:
1418 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1419
1420 err_free:
1421 ib_destroy_cq(cq);
1422
1423 err_file:
1424 if (ev_file)
1425 ib_uverbs_release_ucq(file, ev_file, obj);
1426
1427 err:
1428 put_uobj_write(&obj->uobject);
1429
1430 return ERR_PTR(ret);
1431 }
1432
1433 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1434 struct ib_ucq_object *obj,
1435 struct ib_uverbs_ex_create_cq_resp *resp,
1436 struct ib_udata *ucore, void *context)
1437 {
1438 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1439 return -EFAULT;
1440
1441 return 0;
1442 }
1443
1444 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1445 struct ib_device *ib_dev,
1446 const char __user *buf, int in_len,
1447 int out_len)
1448 {
1449 struct ib_uverbs_create_cq cmd;
1450 struct ib_uverbs_ex_create_cq cmd_ex;
1451 struct ib_uverbs_create_cq_resp resp;
1452 struct ib_udata ucore;
1453 struct ib_udata uhw;
1454 struct ib_ucq_object *obj;
1455
1456 if (out_len < sizeof(resp))
1457 return -ENOSPC;
1458
1459 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1460 return -EFAULT;
1461
1462 INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), sizeof(resp));
1463
1464 INIT_UDATA(&uhw, buf + sizeof(cmd),
1465 (unsigned long)cmd.response + sizeof(resp),
1466 in_len - sizeof(cmd), out_len - sizeof(resp));
1467
1468 memset(&cmd_ex, 0, sizeof(cmd_ex));
1469 cmd_ex.user_handle = cmd.user_handle;
1470 cmd_ex.cqe = cmd.cqe;
1471 cmd_ex.comp_vector = cmd.comp_vector;
1472 cmd_ex.comp_channel = cmd.comp_channel;
1473
1474 obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1475 offsetof(typeof(cmd_ex), comp_channel) +
1476 sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1477 NULL);
1478
1479 if (IS_ERR(obj))
1480 return PTR_ERR(obj);
1481
1482 return in_len;
1483 }
1484
1485 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1486 struct ib_ucq_object *obj,
1487 struct ib_uverbs_ex_create_cq_resp *resp,
1488 struct ib_udata *ucore, void *context)
1489 {
1490 if (ib_copy_to_udata(ucore, resp, resp->response_length))
1491 return -EFAULT;
1492
1493 return 0;
1494 }
1495
1496 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1497 struct ib_device *ib_dev,
1498 struct ib_udata *ucore,
1499 struct ib_udata *uhw)
1500 {
1501 struct ib_uverbs_ex_create_cq_resp resp;
1502 struct ib_uverbs_ex_create_cq cmd;
1503 struct ib_ucq_object *obj;
1504 int err;
1505
1506 if (ucore->inlen < sizeof(cmd))
1507 return -EINVAL;
1508
1509 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1510 if (err)
1511 return err;
1512
1513 if (cmd.comp_mask)
1514 return -EINVAL;
1515
1516 if (cmd.reserved)
1517 return -EINVAL;
1518
1519 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1520 sizeof(resp.response_length)))
1521 return -ENOSPC;
1522
1523 obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1524 min(ucore->inlen, sizeof(cmd)),
1525 ib_uverbs_ex_create_cq_cb, NULL);
1526
1527 if (IS_ERR(obj))
1528 return PTR_ERR(obj);
1529
1530 return 0;
1531 }
1532
1533 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1534 struct ib_device *ib_dev,
1535 const char __user *buf, int in_len,
1536 int out_len)
1537 {
1538 struct ib_uverbs_resize_cq cmd;
1539 struct ib_uverbs_resize_cq_resp resp;
1540 struct ib_udata udata;
1541 struct ib_cq *cq;
1542 int ret = -EINVAL;
1543
1544 if (copy_from_user(&cmd, buf, sizeof cmd))
1545 return -EFAULT;
1546
1547 INIT_UDATA(&udata, buf + sizeof cmd,
1548 (unsigned long) cmd.response + sizeof resp,
1549 in_len - sizeof cmd, out_len - sizeof resp);
1550
1551 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1552 if (!cq)
1553 return -EINVAL;
1554
1555 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1556 if (ret)
1557 goto out;
1558
1559 resp.cqe = cq->cqe;
1560
1561 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1562 &resp, sizeof resp.cqe))
1563 ret = -EFAULT;
1564
1565 out:
1566 put_cq_read(cq);
1567
1568 return ret ? ret : in_len;
1569 }
1570
1571 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1572 {
1573 struct ib_uverbs_wc tmp;
1574
1575 tmp.wr_id = wc->wr_id;
1576 tmp.status = wc->status;
1577 tmp.opcode = wc->opcode;
1578 tmp.vendor_err = wc->vendor_err;
1579 tmp.byte_len = wc->byte_len;
1580 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1581 tmp.qp_num = wc->qp->qp_num;
1582 tmp.src_qp = wc->src_qp;
1583 tmp.wc_flags = wc->wc_flags;
1584 tmp.pkey_index = wc->pkey_index;
1585 tmp.slid = wc->slid;
1586 tmp.sl = wc->sl;
1587 tmp.dlid_path_bits = wc->dlid_path_bits;
1588 tmp.port_num = wc->port_num;
1589 tmp.reserved = 0;
1590
1591 if (copy_to_user(dest, &tmp, sizeof tmp))
1592 return -EFAULT;
1593
1594 return 0;
1595 }
1596
1597 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1598 struct ib_device *ib_dev,
1599 const char __user *buf, int in_len,
1600 int out_len)
1601 {
1602 struct ib_uverbs_poll_cq cmd;
1603 struct ib_uverbs_poll_cq_resp resp;
1604 u8 __user *header_ptr;
1605 u8 __user *data_ptr;
1606 struct ib_cq *cq;
1607 struct ib_wc wc;
1608 int ret;
1609
1610 if (copy_from_user(&cmd, buf, sizeof cmd))
1611 return -EFAULT;
1612
1613 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1614 if (!cq)
1615 return -EINVAL;
1616
1617 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1618 header_ptr = (void __user *)(unsigned long) cmd.response;
1619 data_ptr = header_ptr + sizeof resp;
1620
1621 memset(&resp, 0, sizeof resp);
1622 while (resp.count < cmd.ne) {
1623 ret = ib_poll_cq(cq, 1, &wc);
1624 if (ret < 0)
1625 goto out_put;
1626 if (!ret)
1627 break;
1628
1629 ret = copy_wc_to_user(data_ptr, &wc);
1630 if (ret)
1631 goto out_put;
1632
1633 data_ptr += sizeof(struct ib_uverbs_wc);
1634 ++resp.count;
1635 }
1636
1637 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1638 ret = -EFAULT;
1639 goto out_put;
1640 }
1641
1642 ret = in_len;
1643
1644 out_put:
1645 put_cq_read(cq);
1646 return ret;
1647 }
1648
1649 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1650 struct ib_device *ib_dev,
1651 const char __user *buf, int in_len,
1652 int out_len)
1653 {
1654 struct ib_uverbs_req_notify_cq cmd;
1655 struct ib_cq *cq;
1656
1657 if (copy_from_user(&cmd, buf, sizeof cmd))
1658 return -EFAULT;
1659
1660 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1661 if (!cq)
1662 return -EINVAL;
1663
1664 ib_req_notify_cq(cq, cmd.solicited_only ?
1665 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1666
1667 put_cq_read(cq);
1668
1669 return in_len;
1670 }
1671
1672 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1673 struct ib_device *ib_dev,
1674 const char __user *buf, int in_len,
1675 int out_len)
1676 {
1677 struct ib_uverbs_destroy_cq cmd;
1678 struct ib_uverbs_destroy_cq_resp resp;
1679 struct ib_uobject *uobj;
1680 struct ib_cq *cq;
1681 struct ib_ucq_object *obj;
1682 struct ib_uverbs_event_file *ev_file;
1683 int ret = -EINVAL;
1684
1685 if (copy_from_user(&cmd, buf, sizeof cmd))
1686 return -EFAULT;
1687
1688 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1689 if (!uobj)
1690 return -EINVAL;
1691 cq = uobj->object;
1692 ev_file = cq->cq_context;
1693 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1694
1695 ret = ib_destroy_cq(cq);
1696 if (!ret)
1697 uobj->live = 0;
1698
1699 put_uobj_write(uobj);
1700
1701 if (ret)
1702 return ret;
1703
1704 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1705
1706 mutex_lock(&file->mutex);
1707 list_del(&uobj->list);
1708 mutex_unlock(&file->mutex);
1709
1710 ib_uverbs_release_ucq(file, ev_file, obj);
1711
1712 memset(&resp, 0, sizeof resp);
1713 resp.comp_events_reported = obj->comp_events_reported;
1714 resp.async_events_reported = obj->async_events_reported;
1715
1716 put_uobj(uobj);
1717
1718 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1719 &resp, sizeof resp))
1720 return -EFAULT;
1721
1722 return in_len;
1723 }
1724
1725 static int create_qp(struct ib_uverbs_file *file,
1726 struct ib_udata *ucore,
1727 struct ib_udata *uhw,
1728 struct ib_uverbs_ex_create_qp *cmd,
1729 size_t cmd_sz,
1730 int (*cb)(struct ib_uverbs_file *file,
1731 struct ib_uverbs_ex_create_qp_resp *resp,
1732 struct ib_udata *udata),
1733 void *context)
1734 {
1735 struct ib_uqp_object *obj;
1736 struct ib_device *device;
1737 struct ib_pd *pd = NULL;
1738 struct ib_xrcd *xrcd = NULL;
1739 struct ib_uobject *uninitialized_var(xrcd_uobj);
1740 struct ib_cq *scq = NULL, *rcq = NULL;
1741 struct ib_srq *srq = NULL;
1742 struct ib_qp *qp;
1743 char *buf;
1744 struct ib_qp_init_attr attr;
1745 struct ib_uverbs_ex_create_qp_resp resp;
1746 int ret;
1747
1748 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1749 return -EPERM;
1750
1751 obj = kzalloc(sizeof *obj, GFP_KERNEL);
1752 if (!obj)
1753 return -ENOMEM;
1754
1755 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext,
1756 &qp_lock_class);
1757 down_write(&obj->uevent.uobject.mutex);
1758
1759 if (cmd->qp_type == IB_QPT_XRC_TGT) {
1760 xrcd = idr_read_xrcd(cmd->pd_handle, file->ucontext,
1761 &xrcd_uobj);
1762 if (!xrcd) {
1763 ret = -EINVAL;
1764 goto err_put;
1765 }
1766 device = xrcd->device;
1767 } else {
1768 if (cmd->qp_type == IB_QPT_XRC_INI) {
1769 cmd->max_recv_wr = 0;
1770 cmd->max_recv_sge = 0;
1771 } else {
1772 if (cmd->is_srq) {
1773 srq = idr_read_srq(cmd->srq_handle,
1774 file->ucontext);
1775 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1776 ret = -EINVAL;
1777 goto err_put;
1778 }
1779 }
1780
1781 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1782 rcq = idr_read_cq(cmd->recv_cq_handle,
1783 file->ucontext, 0);
1784 if (!rcq) {
1785 ret = -EINVAL;
1786 goto err_put;
1787 }
1788 }
1789 }
1790
1791 scq = idr_read_cq(cmd->send_cq_handle, file->ucontext, !!rcq);
1792 rcq = rcq ?: scq;
1793 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
1794 if (!pd || !scq) {
1795 ret = -EINVAL;
1796 goto err_put;
1797 }
1798
1799 device = pd->device;
1800 }
1801
1802 attr.event_handler = ib_uverbs_qp_event_handler;
1803 attr.qp_context = file;
1804 attr.send_cq = scq;
1805 attr.recv_cq = rcq;
1806 attr.srq = srq;
1807 attr.xrcd = xrcd;
1808 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1809 IB_SIGNAL_REQ_WR;
1810 attr.qp_type = cmd->qp_type;
1811 attr.create_flags = 0;
1812
1813 attr.cap.max_send_wr = cmd->max_send_wr;
1814 attr.cap.max_recv_wr = cmd->max_recv_wr;
1815 attr.cap.max_send_sge = cmd->max_send_sge;
1816 attr.cap.max_recv_sge = cmd->max_recv_sge;
1817 attr.cap.max_inline_data = cmd->max_inline_data;
1818
1819 obj->uevent.events_reported = 0;
1820 INIT_LIST_HEAD(&obj->uevent.event_list);
1821 INIT_LIST_HEAD(&obj->mcast_list);
1822
1823 if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1824 sizeof(cmd->create_flags))
1825 attr.create_flags = cmd->create_flags;
1826
1827 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1828 IB_QP_CREATE_CROSS_CHANNEL |
1829 IB_QP_CREATE_MANAGED_SEND |
1830 IB_QP_CREATE_MANAGED_RECV)) {
1831 ret = -EINVAL;
1832 goto err_put;
1833 }
1834
1835 buf = (void *)cmd + sizeof(*cmd);
1836 if (cmd_sz > sizeof(*cmd))
1837 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1838 cmd_sz - sizeof(*cmd) - 1))) {
1839 ret = -EINVAL;
1840 goto err_put;
1841 }
1842
1843 if (cmd->qp_type == IB_QPT_XRC_TGT)
1844 qp = ib_create_qp(pd, &attr);
1845 else
1846 qp = device->create_qp(pd, &attr, uhw);
1847
1848 if (IS_ERR(qp)) {
1849 ret = PTR_ERR(qp);
1850 goto err_put;
1851 }
1852
1853 if (cmd->qp_type != IB_QPT_XRC_TGT) {
1854 qp->real_qp = qp;
1855 qp->device = device;
1856 qp->pd = pd;
1857 qp->send_cq = attr.send_cq;
1858 qp->recv_cq = attr.recv_cq;
1859 qp->srq = attr.srq;
1860 qp->event_handler = attr.event_handler;
1861 qp->qp_context = attr.qp_context;
1862 qp->qp_type = attr.qp_type;
1863 atomic_set(&qp->usecnt, 0);
1864 atomic_inc(&pd->usecnt);
1865 atomic_inc(&attr.send_cq->usecnt);
1866 if (attr.recv_cq)
1867 atomic_inc(&attr.recv_cq->usecnt);
1868 if (attr.srq)
1869 atomic_inc(&attr.srq->usecnt);
1870 }
1871 qp->uobject = &obj->uevent.uobject;
1872
1873 obj->uevent.uobject.object = qp;
1874 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1875 if (ret)
1876 goto err_destroy;
1877
1878 memset(&resp, 0, sizeof resp);
1879 resp.base.qpn = qp->qp_num;
1880 resp.base.qp_handle = obj->uevent.uobject.id;
1881 resp.base.max_recv_sge = attr.cap.max_recv_sge;
1882 resp.base.max_send_sge = attr.cap.max_send_sge;
1883 resp.base.max_recv_wr = attr.cap.max_recv_wr;
1884 resp.base.max_send_wr = attr.cap.max_send_wr;
1885 resp.base.max_inline_data = attr.cap.max_inline_data;
1886
1887 resp.response_length = offsetof(typeof(resp), response_length) +
1888 sizeof(resp.response_length);
1889
1890 ret = cb(file, &resp, ucore);
1891 if (ret)
1892 goto err_cb;
1893
1894 if (xrcd) {
1895 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1896 uobject);
1897 atomic_inc(&obj->uxrcd->refcnt);
1898 put_xrcd_read(xrcd_uobj);
1899 }
1900
1901 if (pd)
1902 put_pd_read(pd);
1903 if (scq)
1904 put_cq_read(scq);
1905 if (rcq && rcq != scq)
1906 put_cq_read(rcq);
1907 if (srq)
1908 put_srq_read(srq);
1909
1910 mutex_lock(&file->mutex);
1911 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1912 mutex_unlock(&file->mutex);
1913
1914 obj->uevent.uobject.live = 1;
1915
1916 up_write(&obj->uevent.uobject.mutex);
1917
1918 return 0;
1919 err_cb:
1920 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1921
1922 err_destroy:
1923 ib_destroy_qp(qp);
1924
1925 err_put:
1926 if (xrcd)
1927 put_xrcd_read(xrcd_uobj);
1928 if (pd)
1929 put_pd_read(pd);
1930 if (scq)
1931 put_cq_read(scq);
1932 if (rcq && rcq != scq)
1933 put_cq_read(rcq);
1934 if (srq)
1935 put_srq_read(srq);
1936
1937 put_uobj_write(&obj->uevent.uobject);
1938 return ret;
1939 }
1940
1941 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1942 struct ib_uverbs_ex_create_qp_resp *resp,
1943 struct ib_udata *ucore)
1944 {
1945 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1946 return -EFAULT;
1947
1948 return 0;
1949 }
1950
1951 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1952 struct ib_device *ib_dev,
1953 const char __user *buf, int in_len,
1954 int out_len)
1955 {
1956 struct ib_uverbs_create_qp cmd;
1957 struct ib_uverbs_ex_create_qp cmd_ex;
1958 struct ib_udata ucore;
1959 struct ib_udata uhw;
1960 ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1961 int err;
1962
1963 if (out_len < resp_size)
1964 return -ENOSPC;
1965
1966 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1967 return -EFAULT;
1968
1969 INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd),
1970 resp_size);
1971 INIT_UDATA(&uhw, buf + sizeof(cmd),
1972 (unsigned long)cmd.response + resp_size,
1973 in_len - sizeof(cmd), out_len - resp_size);
1974
1975 memset(&cmd_ex, 0, sizeof(cmd_ex));
1976 cmd_ex.user_handle = cmd.user_handle;
1977 cmd_ex.pd_handle = cmd.pd_handle;
1978 cmd_ex.send_cq_handle = cmd.send_cq_handle;
1979 cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1980 cmd_ex.srq_handle = cmd.srq_handle;
1981 cmd_ex.max_send_wr = cmd.max_send_wr;
1982 cmd_ex.max_recv_wr = cmd.max_recv_wr;
1983 cmd_ex.max_send_sge = cmd.max_send_sge;
1984 cmd_ex.max_recv_sge = cmd.max_recv_sge;
1985 cmd_ex.max_inline_data = cmd.max_inline_data;
1986 cmd_ex.sq_sig_all = cmd.sq_sig_all;
1987 cmd_ex.qp_type = cmd.qp_type;
1988 cmd_ex.is_srq = cmd.is_srq;
1989
1990 err = create_qp(file, &ucore, &uhw, &cmd_ex,
1991 offsetof(typeof(cmd_ex), is_srq) +
1992 sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1993 NULL);
1994
1995 if (err)
1996 return err;
1997
1998 return in_len;
1999 }
2000
2001 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
2002 struct ib_uverbs_ex_create_qp_resp *resp,
2003 struct ib_udata *ucore)
2004 {
2005 if (ib_copy_to_udata(ucore, resp, resp->response_length))
2006 return -EFAULT;
2007
2008 return 0;
2009 }
2010
2011 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
2012 struct ib_device *ib_dev,
2013 struct ib_udata *ucore,
2014 struct ib_udata *uhw)
2015 {
2016 struct ib_uverbs_ex_create_qp_resp resp;
2017 struct ib_uverbs_ex_create_qp cmd = {0};
2018 int err;
2019
2020 if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
2021 sizeof(cmd.comp_mask)))
2022 return -EINVAL;
2023
2024 err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2025 if (err)
2026 return err;
2027
2028 if (cmd.comp_mask)
2029 return -EINVAL;
2030
2031 if (cmd.reserved)
2032 return -EINVAL;
2033
2034 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
2035 sizeof(resp.response_length)))
2036 return -ENOSPC;
2037
2038 err = create_qp(file, ucore, uhw, &cmd,
2039 min(ucore->inlen, sizeof(cmd)),
2040 ib_uverbs_ex_create_qp_cb, NULL);
2041
2042 if (err)
2043 return err;
2044
2045 return 0;
2046 }
2047
2048 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
2049 struct ib_device *ib_dev,
2050 const char __user *buf, int in_len, int out_len)
2051 {
2052 struct ib_uverbs_open_qp cmd;
2053 struct ib_uverbs_create_qp_resp resp;
2054 struct ib_udata udata;
2055 struct ib_uqp_object *obj;
2056 struct ib_xrcd *xrcd;
2057 struct ib_uobject *uninitialized_var(xrcd_uobj);
2058 struct ib_qp *qp;
2059 struct ib_qp_open_attr attr;
2060 int ret;
2061
2062 if (out_len < sizeof resp)
2063 return -ENOSPC;
2064
2065 if (copy_from_user(&cmd, buf, sizeof cmd))
2066 return -EFAULT;
2067
2068 INIT_UDATA(&udata, buf + sizeof cmd,
2069 (unsigned long) cmd.response + sizeof resp,
2070 in_len - sizeof cmd, out_len - sizeof resp);
2071
2072 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2073 if (!obj)
2074 return -ENOMEM;
2075
2076 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
2077 down_write(&obj->uevent.uobject.mutex);
2078
2079 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
2080 if (!xrcd) {
2081 ret = -EINVAL;
2082 goto err_put;
2083 }
2084
2085 attr.event_handler = ib_uverbs_qp_event_handler;
2086 attr.qp_context = file;
2087 attr.qp_num = cmd.qpn;
2088 attr.qp_type = cmd.qp_type;
2089
2090 obj->uevent.events_reported = 0;
2091 INIT_LIST_HEAD(&obj->uevent.event_list);
2092 INIT_LIST_HEAD(&obj->mcast_list);
2093
2094 qp = ib_open_qp(xrcd, &attr);
2095 if (IS_ERR(qp)) {
2096 ret = PTR_ERR(qp);
2097 goto err_put;
2098 }
2099
2100 qp->uobject = &obj->uevent.uobject;
2101
2102 obj->uevent.uobject.object = qp;
2103 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
2104 if (ret)
2105 goto err_destroy;
2106
2107 memset(&resp, 0, sizeof resp);
2108 resp.qpn = qp->qp_num;
2109 resp.qp_handle = obj->uevent.uobject.id;
2110
2111 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2112 &resp, sizeof resp)) {
2113 ret = -EFAULT;
2114 goto err_remove;
2115 }
2116
2117 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2118 atomic_inc(&obj->uxrcd->refcnt);
2119 put_xrcd_read(xrcd_uobj);
2120
2121 mutex_lock(&file->mutex);
2122 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
2123 mutex_unlock(&file->mutex);
2124
2125 obj->uevent.uobject.live = 1;
2126
2127 up_write(&obj->uevent.uobject.mutex);
2128
2129 return in_len;
2130
2131 err_remove:
2132 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
2133
2134 err_destroy:
2135 ib_destroy_qp(qp);
2136
2137 err_put:
2138 put_xrcd_read(xrcd_uobj);
2139 put_uobj_write(&obj->uevent.uobject);
2140 return ret;
2141 }
2142
2143 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
2144 struct ib_device *ib_dev,
2145 const char __user *buf, int in_len,
2146 int out_len)
2147 {
2148 struct ib_uverbs_query_qp cmd;
2149 struct ib_uverbs_query_qp_resp resp;
2150 struct ib_qp *qp;
2151 struct ib_qp_attr *attr;
2152 struct ib_qp_init_attr *init_attr;
2153 int ret;
2154
2155 if (copy_from_user(&cmd, buf, sizeof cmd))
2156 return -EFAULT;
2157
2158 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2159 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
2160 if (!attr || !init_attr) {
2161 ret = -ENOMEM;
2162 goto out;
2163 }
2164
2165 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2166 if (!qp) {
2167 ret = -EINVAL;
2168 goto out;
2169 }
2170
2171 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
2172
2173 put_qp_read(qp);
2174
2175 if (ret)
2176 goto out;
2177
2178 memset(&resp, 0, sizeof resp);
2179
2180 resp.qp_state = attr->qp_state;
2181 resp.cur_qp_state = attr->cur_qp_state;
2182 resp.path_mtu = attr->path_mtu;
2183 resp.path_mig_state = attr->path_mig_state;
2184 resp.qkey = attr->qkey;
2185 resp.rq_psn = attr->rq_psn;
2186 resp.sq_psn = attr->sq_psn;
2187 resp.dest_qp_num = attr->dest_qp_num;
2188 resp.qp_access_flags = attr->qp_access_flags;
2189 resp.pkey_index = attr->pkey_index;
2190 resp.alt_pkey_index = attr->alt_pkey_index;
2191 resp.sq_draining = attr->sq_draining;
2192 resp.max_rd_atomic = attr->max_rd_atomic;
2193 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
2194 resp.min_rnr_timer = attr->min_rnr_timer;
2195 resp.port_num = attr->port_num;
2196 resp.timeout = attr->timeout;
2197 resp.retry_cnt = attr->retry_cnt;
2198 resp.rnr_retry = attr->rnr_retry;
2199 resp.alt_port_num = attr->alt_port_num;
2200 resp.alt_timeout = attr->alt_timeout;
2201
2202 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
2203 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
2204 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
2205 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
2206 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
2207 resp.dest.dlid = attr->ah_attr.dlid;
2208 resp.dest.sl = attr->ah_attr.sl;
2209 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
2210 resp.dest.static_rate = attr->ah_attr.static_rate;
2211 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
2212 resp.dest.port_num = attr->ah_attr.port_num;
2213
2214 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
2215 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
2216 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
2217 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
2218 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
2219 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
2220 resp.alt_dest.sl = attr->alt_ah_attr.sl;
2221 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
2222 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
2223 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
2224 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
2225
2226 resp.max_send_wr = init_attr->cap.max_send_wr;
2227 resp.max_recv_wr = init_attr->cap.max_recv_wr;
2228 resp.max_send_sge = init_attr->cap.max_send_sge;
2229 resp.max_recv_sge = init_attr->cap.max_recv_sge;
2230 resp.max_inline_data = init_attr->cap.max_inline_data;
2231 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
2232
2233 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2234 &resp, sizeof resp))
2235 ret = -EFAULT;
2236
2237 out:
2238 kfree(attr);
2239 kfree(init_attr);
2240
2241 return ret ? ret : in_len;
2242 }
2243
2244 /* Remove ignored fields set in the attribute mask */
2245 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
2246 {
2247 switch (qp_type) {
2248 case IB_QPT_XRC_INI:
2249 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
2250 case IB_QPT_XRC_TGT:
2251 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
2252 IB_QP_RNR_RETRY);
2253 default:
2254 return mask;
2255 }
2256 }
2257
2258 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2259 struct ib_device *ib_dev,
2260 const char __user *buf, int in_len,
2261 int out_len)
2262 {
2263 struct ib_uverbs_modify_qp cmd;
2264 struct ib_udata udata;
2265 struct ib_qp *qp;
2266 struct ib_qp_attr *attr;
2267 int ret;
2268
2269 if (copy_from_user(&cmd, buf, sizeof cmd))
2270 return -EFAULT;
2271
2272 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2273 out_len);
2274
2275 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2276 if (!attr)
2277 return -ENOMEM;
2278
2279 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2280 if (!qp) {
2281 ret = -EINVAL;
2282 goto out;
2283 }
2284
2285 attr->qp_state = cmd.qp_state;
2286 attr->cur_qp_state = cmd.cur_qp_state;
2287 attr->path_mtu = cmd.path_mtu;
2288 attr->path_mig_state = cmd.path_mig_state;
2289 attr->qkey = cmd.qkey;
2290 attr->rq_psn = cmd.rq_psn;
2291 attr->sq_psn = cmd.sq_psn;
2292 attr->dest_qp_num = cmd.dest_qp_num;
2293 attr->qp_access_flags = cmd.qp_access_flags;
2294 attr->pkey_index = cmd.pkey_index;
2295 attr->alt_pkey_index = cmd.alt_pkey_index;
2296 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
2297 attr->max_rd_atomic = cmd.max_rd_atomic;
2298 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
2299 attr->min_rnr_timer = cmd.min_rnr_timer;
2300 attr->port_num = cmd.port_num;
2301 attr->timeout = cmd.timeout;
2302 attr->retry_cnt = cmd.retry_cnt;
2303 attr->rnr_retry = cmd.rnr_retry;
2304 attr->alt_port_num = cmd.alt_port_num;
2305 attr->alt_timeout = cmd.alt_timeout;
2306
2307 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
2308 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
2309 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
2310 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
2311 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
2312 attr->ah_attr.dlid = cmd.dest.dlid;
2313 attr->ah_attr.sl = cmd.dest.sl;
2314 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
2315 attr->ah_attr.static_rate = cmd.dest.static_rate;
2316 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
2317 attr->ah_attr.port_num = cmd.dest.port_num;
2318
2319 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
2320 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
2321 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
2322 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
2323 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
2324 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
2325 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
2326 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
2327 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
2328 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
2329 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
2330
2331 if (qp->real_qp == qp) {
2332 ret = ib_resolve_eth_dmac(qp, attr, &cmd.attr_mask);
2333 if (ret)
2334 goto release_qp;
2335 ret = qp->device->modify_qp(qp, attr,
2336 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
2337 } else {
2338 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
2339 }
2340
2341 if (ret)
2342 goto release_qp;
2343
2344 ret = in_len;
2345
2346 release_qp:
2347 put_qp_read(qp);
2348
2349 out:
2350 kfree(attr);
2351
2352 return ret;
2353 }
2354
2355 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2356 struct ib_device *ib_dev,
2357 const char __user *buf, int in_len,
2358 int out_len)
2359 {
2360 struct ib_uverbs_destroy_qp cmd;
2361 struct ib_uverbs_destroy_qp_resp resp;
2362 struct ib_uobject *uobj;
2363 struct ib_qp *qp;
2364 struct ib_uqp_object *obj;
2365 int ret = -EINVAL;
2366
2367 if (copy_from_user(&cmd, buf, sizeof cmd))
2368 return -EFAULT;
2369
2370 memset(&resp, 0, sizeof resp);
2371
2372 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2373 if (!uobj)
2374 return -EINVAL;
2375 qp = uobj->object;
2376 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2377
2378 if (!list_empty(&obj->mcast_list)) {
2379 put_uobj_write(uobj);
2380 return -EBUSY;
2381 }
2382
2383 ret = ib_destroy_qp(qp);
2384 if (!ret)
2385 uobj->live = 0;
2386
2387 put_uobj_write(uobj);
2388
2389 if (ret)
2390 return ret;
2391
2392 if (obj->uxrcd)
2393 atomic_dec(&obj->uxrcd->refcnt);
2394
2395 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2396
2397 mutex_lock(&file->mutex);
2398 list_del(&uobj->list);
2399 mutex_unlock(&file->mutex);
2400
2401 ib_uverbs_release_uevent(file, &obj->uevent);
2402
2403 resp.events_reported = obj->uevent.events_reported;
2404
2405 put_uobj(uobj);
2406
2407 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2408 &resp, sizeof resp))
2409 return -EFAULT;
2410
2411 return in_len;
2412 }
2413
2414 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2415 {
2416 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2417 num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2418 };
2419
2420 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2421 struct ib_device *ib_dev,
2422 const char __user *buf, int in_len,
2423 int out_len)
2424 {
2425 struct ib_uverbs_post_send cmd;
2426 struct ib_uverbs_post_send_resp resp;
2427 struct ib_uverbs_send_wr *user_wr;
2428 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
2429 struct ib_qp *qp;
2430 int i, sg_ind;
2431 int is_ud;
2432 ssize_t ret = -EINVAL;
2433 size_t next_size;
2434
2435 if (copy_from_user(&cmd, buf, sizeof cmd))
2436 return -EFAULT;
2437
2438 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2439 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2440 return -EINVAL;
2441
2442 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2443 return -EINVAL;
2444
2445 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2446 if (!user_wr)
2447 return -ENOMEM;
2448
2449 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2450 if (!qp)
2451 goto out;
2452
2453 is_ud = qp->qp_type == IB_QPT_UD;
2454 sg_ind = 0;
2455 last = NULL;
2456 for (i = 0; i < cmd.wr_count; ++i) {
2457 if (copy_from_user(user_wr,
2458 buf + sizeof cmd + i * cmd.wqe_size,
2459 cmd.wqe_size)) {
2460 ret = -EFAULT;
2461 goto out_put;
2462 }
2463
2464 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2465 ret = -EINVAL;
2466 goto out_put;
2467 }
2468
2469 if (is_ud) {
2470 struct ib_ud_wr *ud;
2471
2472 if (user_wr->opcode != IB_WR_SEND &&
2473 user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2474 ret = -EINVAL;
2475 goto out_put;
2476 }
2477
2478 next_size = sizeof(*ud);
2479 ud = alloc_wr(next_size, user_wr->num_sge);
2480 if (!ud) {
2481 ret = -ENOMEM;
2482 goto out_put;
2483 }
2484
2485 ud->ah = idr_read_ah(user_wr->wr.ud.ah, file->ucontext);
2486 if (!ud->ah) {
2487 kfree(ud);
2488 ret = -EINVAL;
2489 goto out_put;
2490 }
2491 ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2492 ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2493
2494 next = &ud->wr;
2495 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2496 user_wr->opcode == IB_WR_RDMA_WRITE ||
2497 user_wr->opcode == IB_WR_RDMA_READ) {
2498 struct ib_rdma_wr *rdma;
2499
2500 next_size = sizeof(*rdma);
2501 rdma = alloc_wr(next_size, user_wr->num_sge);
2502 if (!rdma) {
2503 ret = -ENOMEM;
2504 goto out_put;
2505 }
2506
2507 rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2508 rdma->rkey = user_wr->wr.rdma.rkey;
2509
2510 next = &rdma->wr;
2511 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2512 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2513 struct ib_atomic_wr *atomic;
2514
2515 next_size = sizeof(*atomic);
2516 atomic = alloc_wr(next_size, user_wr->num_sge);
2517 if (!atomic) {
2518 ret = -ENOMEM;
2519 goto out_put;
2520 }
2521
2522 atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2523 atomic->compare_add = user_wr->wr.atomic.compare_add;
2524 atomic->swap = user_wr->wr.atomic.swap;
2525 atomic->rkey = user_wr->wr.atomic.rkey;
2526
2527 next = &atomic->wr;
2528 } else if (user_wr->opcode == IB_WR_SEND ||
2529 user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2530 user_wr->opcode == IB_WR_SEND_WITH_INV) {
2531 next_size = sizeof(*next);
2532 next = alloc_wr(next_size, user_wr->num_sge);
2533 if (!next) {
2534 ret = -ENOMEM;
2535 goto out_put;
2536 }
2537 } else {
2538 ret = -EINVAL;
2539 goto out_put;
2540 }
2541
2542 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2543 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2544 next->ex.imm_data =
2545 (__be32 __force) user_wr->ex.imm_data;
2546 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2547 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2548 }
2549
2550 if (!last)
2551 wr = next;
2552 else
2553 last->next = next;
2554 last = next;
2555
2556 next->next = NULL;
2557 next->wr_id = user_wr->wr_id;
2558 next->num_sge = user_wr->num_sge;
2559 next->opcode = user_wr->opcode;
2560 next->send_flags = user_wr->send_flags;
2561
2562 if (next->num_sge) {
2563 next->sg_list = (void *) next +
2564 ALIGN(next_size, sizeof(struct ib_sge));
2565 if (copy_from_user(next->sg_list,
2566 buf + sizeof cmd +
2567 cmd.wr_count * cmd.wqe_size +
2568 sg_ind * sizeof (struct ib_sge),
2569 next->num_sge * sizeof (struct ib_sge))) {
2570 ret = -EFAULT;
2571 goto out_put;
2572 }
2573 sg_ind += next->num_sge;
2574 } else
2575 next->sg_list = NULL;
2576 }
2577
2578 resp.bad_wr = 0;
2579 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2580 if (ret)
2581 for (next = wr; next; next = next->next) {
2582 ++resp.bad_wr;
2583 if (next == bad_wr)
2584 break;
2585 }
2586
2587 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2588 &resp, sizeof resp))
2589 ret = -EFAULT;
2590
2591 out_put:
2592 put_qp_read(qp);
2593
2594 while (wr) {
2595 if (is_ud && ud_wr(wr)->ah)
2596 put_ah_read(ud_wr(wr)->ah);
2597 next = wr->next;
2598 kfree(wr);
2599 wr = next;
2600 }
2601
2602 out:
2603 kfree(user_wr);
2604
2605 return ret ? ret : in_len;
2606 }
2607
2608 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2609 int in_len,
2610 u32 wr_count,
2611 u32 sge_count,
2612 u32 wqe_size)
2613 {
2614 struct ib_uverbs_recv_wr *user_wr;
2615 struct ib_recv_wr *wr = NULL, *last, *next;
2616 int sg_ind;
2617 int i;
2618 int ret;
2619
2620 if (in_len < wqe_size * wr_count +
2621 sge_count * sizeof (struct ib_uverbs_sge))
2622 return ERR_PTR(-EINVAL);
2623
2624 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2625 return ERR_PTR(-EINVAL);
2626
2627 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2628 if (!user_wr)
2629 return ERR_PTR(-ENOMEM);
2630
2631 sg_ind = 0;
2632 last = NULL;
2633 for (i = 0; i < wr_count; ++i) {
2634 if (copy_from_user(user_wr, buf + i * wqe_size,
2635 wqe_size)) {
2636 ret = -EFAULT;
2637 goto err;
2638 }
2639
2640 if (user_wr->num_sge + sg_ind > sge_count) {
2641 ret = -EINVAL;
2642 goto err;
2643 }
2644
2645 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2646 user_wr->num_sge * sizeof (struct ib_sge),
2647 GFP_KERNEL);
2648 if (!next) {
2649 ret = -ENOMEM;
2650 goto err;
2651 }
2652
2653 if (!last)
2654 wr = next;
2655 else
2656 last->next = next;
2657 last = next;
2658
2659 next->next = NULL;
2660 next->wr_id = user_wr->wr_id;
2661 next->num_sge = user_wr->num_sge;
2662
2663 if (next->num_sge) {
2664 next->sg_list = (void *) next +
2665 ALIGN(sizeof *next, sizeof (struct ib_sge));
2666 if (copy_from_user(next->sg_list,
2667 buf + wr_count * wqe_size +
2668 sg_ind * sizeof (struct ib_sge),
2669 next->num_sge * sizeof (struct ib_sge))) {
2670 ret = -EFAULT;
2671 goto err;
2672 }
2673 sg_ind += next->num_sge;
2674 } else
2675 next->sg_list = NULL;
2676 }
2677
2678 kfree(user_wr);
2679 return wr;
2680
2681 err:
2682 kfree(user_wr);
2683
2684 while (wr) {
2685 next = wr->next;
2686 kfree(wr);
2687 wr = next;
2688 }
2689
2690 return ERR_PTR(ret);
2691 }
2692
2693 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2694 struct ib_device *ib_dev,
2695 const char __user *buf, int in_len,
2696 int out_len)
2697 {
2698 struct ib_uverbs_post_recv cmd;
2699 struct ib_uverbs_post_recv_resp resp;
2700 struct ib_recv_wr *wr, *next, *bad_wr;
2701 struct ib_qp *qp;
2702 ssize_t ret = -EINVAL;
2703
2704 if (copy_from_user(&cmd, buf, sizeof cmd))
2705 return -EFAULT;
2706
2707 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2708 in_len - sizeof cmd, cmd.wr_count,
2709 cmd.sge_count, cmd.wqe_size);
2710 if (IS_ERR(wr))
2711 return PTR_ERR(wr);
2712
2713 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2714 if (!qp)
2715 goto out;
2716
2717 resp.bad_wr = 0;
2718 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2719
2720 put_qp_read(qp);
2721
2722 if (ret)
2723 for (next = wr; next; next = next->next) {
2724 ++resp.bad_wr;
2725 if (next == bad_wr)
2726 break;
2727 }
2728
2729 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2730 &resp, sizeof resp))
2731 ret = -EFAULT;
2732
2733 out:
2734 while (wr) {
2735 next = wr->next;
2736 kfree(wr);
2737 wr = next;
2738 }
2739
2740 return ret ? ret : in_len;
2741 }
2742
2743 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2744 struct ib_device *ib_dev,
2745 const char __user *buf, int in_len,
2746 int out_len)
2747 {
2748 struct ib_uverbs_post_srq_recv cmd;
2749 struct ib_uverbs_post_srq_recv_resp resp;
2750 struct ib_recv_wr *wr, *next, *bad_wr;
2751 struct ib_srq *srq;
2752 ssize_t ret = -EINVAL;
2753
2754 if (copy_from_user(&cmd, buf, sizeof cmd))
2755 return -EFAULT;
2756
2757 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2758 in_len - sizeof cmd, cmd.wr_count,
2759 cmd.sge_count, cmd.wqe_size);
2760 if (IS_ERR(wr))
2761 return PTR_ERR(wr);
2762
2763 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2764 if (!srq)
2765 goto out;
2766
2767 resp.bad_wr = 0;
2768 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2769
2770 put_srq_read(srq);
2771
2772 if (ret)
2773 for (next = wr; next; next = next->next) {
2774 ++resp.bad_wr;
2775 if (next == bad_wr)
2776 break;
2777 }
2778
2779 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2780 &resp, sizeof resp))
2781 ret = -EFAULT;
2782
2783 out:
2784 while (wr) {
2785 next = wr->next;
2786 kfree(wr);
2787 wr = next;
2788 }
2789
2790 return ret ? ret : in_len;
2791 }
2792
2793 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2794 struct ib_device *ib_dev,
2795 const char __user *buf, int in_len,
2796 int out_len)
2797 {
2798 struct ib_uverbs_create_ah cmd;
2799 struct ib_uverbs_create_ah_resp resp;
2800 struct ib_uobject *uobj;
2801 struct ib_pd *pd;
2802 struct ib_ah *ah;
2803 struct ib_ah_attr attr;
2804 int ret;
2805
2806 if (out_len < sizeof resp)
2807 return -ENOSPC;
2808
2809 if (copy_from_user(&cmd, buf, sizeof cmd))
2810 return -EFAULT;
2811
2812 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2813 if (!uobj)
2814 return -ENOMEM;
2815
2816 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2817 down_write(&uobj->mutex);
2818
2819 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2820 if (!pd) {
2821 ret = -EINVAL;
2822 goto err;
2823 }
2824
2825 attr.dlid = cmd.attr.dlid;
2826 attr.sl = cmd.attr.sl;
2827 attr.src_path_bits = cmd.attr.src_path_bits;
2828 attr.static_rate = cmd.attr.static_rate;
2829 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2830 attr.port_num = cmd.attr.port_num;
2831 attr.grh.flow_label = cmd.attr.grh.flow_label;
2832 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2833 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2834 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2835 memset(&attr.dmac, 0, sizeof(attr.dmac));
2836 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2837
2838 ah = ib_create_ah(pd, &attr);
2839 if (IS_ERR(ah)) {
2840 ret = PTR_ERR(ah);
2841 goto err_put;
2842 }
2843
2844 ah->uobject = uobj;
2845 uobj->object = ah;
2846
2847 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2848 if (ret)
2849 goto err_destroy;
2850
2851 resp.ah_handle = uobj->id;
2852
2853 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2854 &resp, sizeof resp)) {
2855 ret = -EFAULT;
2856 goto err_copy;
2857 }
2858
2859 put_pd_read(pd);
2860
2861 mutex_lock(&file->mutex);
2862 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2863 mutex_unlock(&file->mutex);
2864
2865 uobj->live = 1;
2866
2867 up_write(&uobj->mutex);
2868
2869 return in_len;
2870
2871 err_copy:
2872 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2873
2874 err_destroy:
2875 ib_destroy_ah(ah);
2876
2877 err_put:
2878 put_pd_read(pd);
2879
2880 err:
2881 put_uobj_write(uobj);
2882 return ret;
2883 }
2884
2885 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2886 struct ib_device *ib_dev,
2887 const char __user *buf, int in_len, int out_len)
2888 {
2889 struct ib_uverbs_destroy_ah cmd;
2890 struct ib_ah *ah;
2891 struct ib_uobject *uobj;
2892 int ret;
2893
2894 if (copy_from_user(&cmd, buf, sizeof cmd))
2895 return -EFAULT;
2896
2897 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2898 if (!uobj)
2899 return -EINVAL;
2900 ah = uobj->object;
2901
2902 ret = ib_destroy_ah(ah);
2903 if (!ret)
2904 uobj->live = 0;
2905
2906 put_uobj_write(uobj);
2907
2908 if (ret)
2909 return ret;
2910
2911 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2912
2913 mutex_lock(&file->mutex);
2914 list_del(&uobj->list);
2915 mutex_unlock(&file->mutex);
2916
2917 put_uobj(uobj);
2918
2919 return in_len;
2920 }
2921
2922 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2923 struct ib_device *ib_dev,
2924 const char __user *buf, int in_len,
2925 int out_len)
2926 {
2927 struct ib_uverbs_attach_mcast cmd;
2928 struct ib_qp *qp;
2929 struct ib_uqp_object *obj;
2930 struct ib_uverbs_mcast_entry *mcast;
2931 int ret;
2932
2933 if (copy_from_user(&cmd, buf, sizeof cmd))
2934 return -EFAULT;
2935
2936 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2937 if (!qp)
2938 return -EINVAL;
2939
2940 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2941
2942 list_for_each_entry(mcast, &obj->mcast_list, list)
2943 if (cmd.mlid == mcast->lid &&
2944 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2945 ret = 0;
2946 goto out_put;
2947 }
2948
2949 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2950 if (!mcast) {
2951 ret = -ENOMEM;
2952 goto out_put;
2953 }
2954
2955 mcast->lid = cmd.mlid;
2956 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2957
2958 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2959 if (!ret)
2960 list_add_tail(&mcast->list, &obj->mcast_list);
2961 else
2962 kfree(mcast);
2963
2964 out_put:
2965 put_qp_write(qp);
2966
2967 return ret ? ret : in_len;
2968 }
2969
2970 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2971 struct ib_device *ib_dev,
2972 const char __user *buf, int in_len,
2973 int out_len)
2974 {
2975 struct ib_uverbs_detach_mcast cmd;
2976 struct ib_uqp_object *obj;
2977 struct ib_qp *qp;
2978 struct ib_uverbs_mcast_entry *mcast;
2979 int ret = -EINVAL;
2980
2981 if (copy_from_user(&cmd, buf, sizeof cmd))
2982 return -EFAULT;
2983
2984 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2985 if (!qp)
2986 return -EINVAL;
2987
2988 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2989 if (ret)
2990 goto out_put;
2991
2992 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2993
2994 list_for_each_entry(mcast, &obj->mcast_list, list)
2995 if (cmd.mlid == mcast->lid &&
2996 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2997 list_del(&mcast->list);
2998 kfree(mcast);
2999 break;
3000 }
3001
3002 out_put:
3003 put_qp_write(qp);
3004
3005 return ret ? ret : in_len;
3006 }
3007
3008 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
3009 union ib_flow_spec *ib_spec)
3010 {
3011 if (kern_spec->reserved)
3012 return -EINVAL;
3013
3014 ib_spec->type = kern_spec->type;
3015
3016 switch (ib_spec->type) {
3017 case IB_FLOW_SPEC_ETH:
3018 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
3019 if (ib_spec->eth.size != kern_spec->eth.size)
3020 return -EINVAL;
3021 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
3022 sizeof(struct ib_flow_eth_filter));
3023 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
3024 sizeof(struct ib_flow_eth_filter));
3025 break;
3026 case IB_FLOW_SPEC_IPV4:
3027 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
3028 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
3029 return -EINVAL;
3030 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
3031 sizeof(struct ib_flow_ipv4_filter));
3032 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
3033 sizeof(struct ib_flow_ipv4_filter));
3034 break;
3035 case IB_FLOW_SPEC_TCP:
3036 case IB_FLOW_SPEC_UDP:
3037 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
3038 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
3039 return -EINVAL;
3040 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
3041 sizeof(struct ib_flow_tcp_udp_filter));
3042 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
3043 sizeof(struct ib_flow_tcp_udp_filter));
3044 break;
3045 default:
3046 return -EINVAL;
3047 }
3048 return 0;
3049 }
3050
3051 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3052 struct ib_device *ib_dev,
3053 struct ib_udata *ucore,
3054 struct ib_udata *uhw)
3055 {
3056 struct ib_uverbs_create_flow cmd;
3057 struct ib_uverbs_create_flow_resp resp;
3058 struct ib_uobject *uobj;
3059 struct ib_flow *flow_id;
3060 struct ib_uverbs_flow_attr *kern_flow_attr;
3061 struct ib_flow_attr *flow_attr;
3062 struct ib_qp *qp;
3063 int err = 0;
3064 void *kern_spec;
3065 void *ib_spec;
3066 int i;
3067
3068 if (ucore->inlen < sizeof(cmd))
3069 return -EINVAL;
3070
3071 if (ucore->outlen < sizeof(resp))
3072 return -ENOSPC;
3073
3074 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3075 if (err)
3076 return err;
3077
3078 ucore->inbuf += sizeof(cmd);
3079 ucore->inlen -= sizeof(cmd);
3080
3081 if (cmd.comp_mask)
3082 return -EINVAL;
3083
3084 if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
3085 !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
3086 return -EPERM;
3087
3088 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3089 return -EINVAL;
3090
3091 if (cmd.flow_attr.size > ucore->inlen ||
3092 cmd.flow_attr.size >
3093 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3094 return -EINVAL;
3095
3096 if (cmd.flow_attr.reserved[0] ||
3097 cmd.flow_attr.reserved[1])
3098 return -EINVAL;
3099
3100 if (cmd.flow_attr.num_of_specs) {
3101 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3102 GFP_KERNEL);
3103 if (!kern_flow_attr)
3104 return -ENOMEM;
3105
3106 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3107 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3108 cmd.flow_attr.size);
3109 if (err)
3110 goto err_free_attr;
3111 } else {
3112 kern_flow_attr = &cmd.flow_attr;
3113 }
3114
3115 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
3116 if (!uobj) {
3117 err = -ENOMEM;
3118 goto err_free_attr;
3119 }
3120 init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
3121 down_write(&uobj->mutex);
3122
3123 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
3124 if (!qp) {
3125 err = -EINVAL;
3126 goto err_uobj;
3127 }
3128
3129 flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL);
3130 if (!flow_attr) {
3131 err = -ENOMEM;
3132 goto err_put;
3133 }
3134
3135 flow_attr->type = kern_flow_attr->type;
3136 flow_attr->priority = kern_flow_attr->priority;
3137 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3138 flow_attr->port = kern_flow_attr->port;
3139 flow_attr->flags = kern_flow_attr->flags;
3140 flow_attr->size = sizeof(*flow_attr);
3141
3142 kern_spec = kern_flow_attr + 1;
3143 ib_spec = flow_attr + 1;
3144 for (i = 0; i < flow_attr->num_of_specs &&
3145 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3146 cmd.flow_attr.size >=
3147 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3148 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3149 if (err)
3150 goto err_free;
3151 flow_attr->size +=
3152 ((union ib_flow_spec *) ib_spec)->size;
3153 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3154 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3155 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3156 }
3157 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3158 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3159 i, cmd.flow_attr.size);
3160 err = -EINVAL;
3161 goto err_free;
3162 }
3163 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3164 if (IS_ERR(flow_id)) {
3165 err = PTR_ERR(flow_id);
3166 goto err_free;
3167 }
3168 flow_id->qp = qp;
3169 flow_id->uobject = uobj;
3170 uobj->object = flow_id;
3171
3172 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
3173 if (err)
3174 goto destroy_flow;
3175
3176 memset(&resp, 0, sizeof(resp));
3177 resp.flow_handle = uobj->id;
3178
3179 err = ib_copy_to_udata(ucore,
3180 &resp, sizeof(resp));
3181 if (err)
3182 goto err_copy;
3183
3184 put_qp_read(qp);
3185 mutex_lock(&file->mutex);
3186 list_add_tail(&uobj->list, &file->ucontext->rule_list);
3187 mutex_unlock(&file->mutex);
3188
3189 uobj->live = 1;
3190
3191 up_write(&uobj->mutex);
3192 kfree(flow_attr);
3193 if (cmd.flow_attr.num_of_specs)
3194 kfree(kern_flow_attr);
3195 return 0;
3196 err_copy:
3197 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3198 destroy_flow:
3199 ib_destroy_flow(flow_id);
3200 err_free:
3201 kfree(flow_attr);
3202 err_put:
3203 put_qp_read(qp);
3204 err_uobj:
3205 put_uobj_write(uobj);
3206 err_free_attr:
3207 if (cmd.flow_attr.num_of_specs)
3208 kfree(kern_flow_attr);
3209 return err;
3210 }
3211
3212 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3213 struct ib_device *ib_dev,
3214 struct ib_udata *ucore,
3215 struct ib_udata *uhw)
3216 {
3217 struct ib_uverbs_destroy_flow cmd;
3218 struct ib_flow *flow_id;
3219 struct ib_uobject *uobj;
3220 int ret;
3221
3222 if (ucore->inlen < sizeof(cmd))
3223 return -EINVAL;
3224
3225 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3226 if (ret)
3227 return ret;
3228
3229 if (cmd.comp_mask)
3230 return -EINVAL;
3231
3232 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
3233 file->ucontext);
3234 if (!uobj)
3235 return -EINVAL;
3236 flow_id = uobj->object;
3237
3238 ret = ib_destroy_flow(flow_id);
3239 if (!ret)
3240 uobj->live = 0;
3241
3242 put_uobj_write(uobj);
3243
3244 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3245
3246 mutex_lock(&file->mutex);
3247 list_del(&uobj->list);
3248 mutex_unlock(&file->mutex);
3249
3250 put_uobj(uobj);
3251
3252 return ret;
3253 }
3254
3255 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3256 struct ib_device *ib_dev,
3257 struct ib_uverbs_create_xsrq *cmd,
3258 struct ib_udata *udata)
3259 {
3260 struct ib_uverbs_create_srq_resp resp;
3261 struct ib_usrq_object *obj;
3262 struct ib_pd *pd;
3263 struct ib_srq *srq;
3264 struct ib_uobject *uninitialized_var(xrcd_uobj);
3265 struct ib_srq_init_attr attr;
3266 int ret;
3267
3268 obj = kmalloc(sizeof *obj, GFP_KERNEL);
3269 if (!obj)
3270 return -ENOMEM;
3271
3272 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
3273 down_write(&obj->uevent.uobject.mutex);
3274
3275 if (cmd->srq_type == IB_SRQT_XRC) {
3276 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
3277 if (!attr.ext.xrc.xrcd) {
3278 ret = -EINVAL;
3279 goto err;
3280 }
3281
3282 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3283 atomic_inc(&obj->uxrcd->refcnt);
3284
3285 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
3286 if (!attr.ext.xrc.cq) {
3287 ret = -EINVAL;
3288 goto err_put_xrcd;
3289 }
3290 }
3291
3292 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
3293 if (!pd) {
3294 ret = -EINVAL;
3295 goto err_put_cq;
3296 }
3297
3298 attr.event_handler = ib_uverbs_srq_event_handler;
3299 attr.srq_context = file;
3300 attr.srq_type = cmd->srq_type;
3301 attr.attr.max_wr = cmd->max_wr;
3302 attr.attr.max_sge = cmd->max_sge;
3303 attr.attr.srq_limit = cmd->srq_limit;
3304
3305 obj->uevent.events_reported = 0;
3306 INIT_LIST_HEAD(&obj->uevent.event_list);
3307
3308 srq = pd->device->create_srq(pd, &attr, udata);
3309 if (IS_ERR(srq)) {
3310 ret = PTR_ERR(srq);
3311 goto err_put;
3312 }
3313
3314 srq->device = pd->device;
3315 srq->pd = pd;
3316 srq->srq_type = cmd->srq_type;
3317 srq->uobject = &obj->uevent.uobject;
3318 srq->event_handler = attr.event_handler;
3319 srq->srq_context = attr.srq_context;
3320
3321 if (cmd->srq_type == IB_SRQT_XRC) {
3322 srq->ext.xrc.cq = attr.ext.xrc.cq;
3323 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3324 atomic_inc(&attr.ext.xrc.cq->usecnt);
3325 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3326 }
3327
3328 atomic_inc(&pd->usecnt);
3329 atomic_set(&srq->usecnt, 0);
3330
3331 obj->uevent.uobject.object = srq;
3332 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3333 if (ret)
3334 goto err_destroy;
3335
3336 memset(&resp, 0, sizeof resp);
3337 resp.srq_handle = obj->uevent.uobject.id;
3338 resp.max_wr = attr.attr.max_wr;
3339 resp.max_sge = attr.attr.max_sge;
3340 if (cmd->srq_type == IB_SRQT_XRC)
3341 resp.srqn = srq->ext.xrc.srq_num;
3342
3343 if (copy_to_user((void __user *) (unsigned long) cmd->response,
3344 &resp, sizeof resp)) {
3345 ret = -EFAULT;
3346 goto err_copy;
3347 }
3348
3349 if (cmd->srq_type == IB_SRQT_XRC) {
3350 put_uobj_read(xrcd_uobj);
3351 put_cq_read(attr.ext.xrc.cq);
3352 }
3353 put_pd_read(pd);
3354
3355 mutex_lock(&file->mutex);
3356 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
3357 mutex_unlock(&file->mutex);
3358
3359 obj->uevent.uobject.live = 1;
3360
3361 up_write(&obj->uevent.uobject.mutex);
3362
3363 return 0;
3364
3365 err_copy:
3366 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3367
3368 err_destroy:
3369 ib_destroy_srq(srq);
3370
3371 err_put:
3372 put_pd_read(pd);
3373
3374 err_put_cq:
3375 if (cmd->srq_type == IB_SRQT_XRC)
3376 put_cq_read(attr.ext.xrc.cq);
3377
3378 err_put_xrcd:
3379 if (cmd->srq_type == IB_SRQT_XRC) {
3380 atomic_dec(&obj->uxrcd->refcnt);
3381 put_uobj_read(xrcd_uobj);
3382 }
3383
3384 err:
3385 put_uobj_write(&obj->uevent.uobject);
3386 return ret;
3387 }
3388
3389 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3390 struct ib_device *ib_dev,
3391 const char __user *buf, int in_len,
3392 int out_len)
3393 {
3394 struct ib_uverbs_create_srq cmd;
3395 struct ib_uverbs_create_xsrq xcmd;
3396 struct ib_uverbs_create_srq_resp resp;
3397 struct ib_udata udata;
3398 int ret;
3399
3400 if (out_len < sizeof resp)
3401 return -ENOSPC;
3402
3403 if (copy_from_user(&cmd, buf, sizeof cmd))
3404 return -EFAULT;
3405
3406 xcmd.response = cmd.response;
3407 xcmd.user_handle = cmd.user_handle;
3408 xcmd.srq_type = IB_SRQT_BASIC;
3409 xcmd.pd_handle = cmd.pd_handle;
3410 xcmd.max_wr = cmd.max_wr;
3411 xcmd.max_sge = cmd.max_sge;
3412 xcmd.srq_limit = cmd.srq_limit;
3413
3414 INIT_UDATA(&udata, buf + sizeof cmd,
3415 (unsigned long) cmd.response + sizeof resp,
3416 in_len - sizeof cmd, out_len - sizeof resp);
3417
3418 ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3419 if (ret)
3420 return ret;
3421
3422 return in_len;
3423 }
3424
3425 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3426 struct ib_device *ib_dev,
3427 const char __user *buf, int in_len, int out_len)
3428 {
3429 struct ib_uverbs_create_xsrq cmd;
3430 struct ib_uverbs_create_srq_resp resp;
3431 struct ib_udata udata;
3432 int ret;
3433
3434 if (out_len < sizeof resp)
3435 return -ENOSPC;
3436
3437 if (copy_from_user(&cmd, buf, sizeof cmd))
3438 return -EFAULT;
3439
3440 INIT_UDATA(&udata, buf + sizeof cmd,
3441 (unsigned long) cmd.response + sizeof resp,
3442 in_len - sizeof cmd, out_len - sizeof resp);
3443
3444 ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3445 if (ret)
3446 return ret;
3447
3448 return in_len;
3449 }
3450
3451 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3452 struct ib_device *ib_dev,
3453 const char __user *buf, int in_len,
3454 int out_len)
3455 {
3456 struct ib_uverbs_modify_srq cmd;
3457 struct ib_udata udata;
3458 struct ib_srq *srq;
3459 struct ib_srq_attr attr;
3460 int ret;
3461
3462 if (copy_from_user(&cmd, buf, sizeof cmd))
3463 return -EFAULT;
3464
3465 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3466 out_len);
3467
3468 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3469 if (!srq)
3470 return -EINVAL;
3471
3472 attr.max_wr = cmd.max_wr;
3473 attr.srq_limit = cmd.srq_limit;
3474
3475 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3476
3477 put_srq_read(srq);
3478
3479 return ret ? ret : in_len;
3480 }
3481
3482 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3483 struct ib_device *ib_dev,
3484 const char __user *buf,
3485 int in_len, int out_len)
3486 {
3487 struct ib_uverbs_query_srq cmd;
3488 struct ib_uverbs_query_srq_resp resp;
3489 struct ib_srq_attr attr;
3490 struct ib_srq *srq;
3491 int ret;
3492
3493 if (out_len < sizeof resp)
3494 return -ENOSPC;
3495
3496 if (copy_from_user(&cmd, buf, sizeof cmd))
3497 return -EFAULT;
3498
3499 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3500 if (!srq)
3501 return -EINVAL;
3502
3503 ret = ib_query_srq(srq, &attr);
3504
3505 put_srq_read(srq);
3506
3507 if (ret)
3508 return ret;
3509
3510 memset(&resp, 0, sizeof resp);
3511
3512 resp.max_wr = attr.max_wr;
3513 resp.max_sge = attr.max_sge;
3514 resp.srq_limit = attr.srq_limit;
3515
3516 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3517 &resp, sizeof resp))
3518 return -EFAULT;
3519
3520 return in_len;
3521 }
3522
3523 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3524 struct ib_device *ib_dev,
3525 const char __user *buf, int in_len,
3526 int out_len)
3527 {
3528 struct ib_uverbs_destroy_srq cmd;
3529 struct ib_uverbs_destroy_srq_resp resp;
3530 struct ib_uobject *uobj;
3531 struct ib_srq *srq;
3532 struct ib_uevent_object *obj;
3533 int ret = -EINVAL;
3534 struct ib_usrq_object *us;
3535 enum ib_srq_type srq_type;
3536
3537 if (copy_from_user(&cmd, buf, sizeof cmd))
3538 return -EFAULT;
3539
3540 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3541 if (!uobj)
3542 return -EINVAL;
3543 srq = uobj->object;
3544 obj = container_of(uobj, struct ib_uevent_object, uobject);
3545 srq_type = srq->srq_type;
3546
3547 ret = ib_destroy_srq(srq);
3548 if (!ret)
3549 uobj->live = 0;
3550
3551 put_uobj_write(uobj);
3552
3553 if (ret)
3554 return ret;
3555
3556 if (srq_type == IB_SRQT_XRC) {
3557 us = container_of(obj, struct ib_usrq_object, uevent);
3558 atomic_dec(&us->uxrcd->refcnt);
3559 }
3560
3561 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
3562
3563 mutex_lock(&file->mutex);
3564 list_del(&uobj->list);
3565 mutex_unlock(&file->mutex);
3566
3567 ib_uverbs_release_uevent(file, obj);
3568
3569 memset(&resp, 0, sizeof resp);
3570 resp.events_reported = obj->events_reported;
3571
3572 put_uobj(uobj);
3573
3574 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3575 &resp, sizeof resp))
3576 ret = -EFAULT;
3577
3578 return ret ? ret : in_len;
3579 }
3580
3581 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3582 struct ib_device *ib_dev,
3583 struct ib_udata *ucore,
3584 struct ib_udata *uhw)
3585 {
3586 struct ib_uverbs_ex_query_device_resp resp;
3587 struct ib_uverbs_ex_query_device cmd;
3588 struct ib_device_attr attr;
3589 int err;
3590
3591 if (ucore->inlen < sizeof(cmd))
3592 return -EINVAL;
3593
3594 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3595 if (err)
3596 return err;
3597
3598 if (cmd.comp_mask)
3599 return -EINVAL;
3600
3601 if (cmd.reserved)
3602 return -EINVAL;
3603
3604 resp.response_length = offsetof(typeof(resp), odp_caps);
3605
3606 if (ucore->outlen < resp.response_length)
3607 return -ENOSPC;
3608
3609 memset(&attr, 0, sizeof(attr));
3610
3611 err = ib_dev->query_device(ib_dev, &attr, uhw);
3612 if (err)
3613 return err;
3614
3615 copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3616 resp.comp_mask = 0;
3617
3618 if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3619 goto end;
3620
3621 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3622 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3623 resp.odp_caps.per_transport_caps.rc_odp_caps =
3624 attr.odp_caps.per_transport_caps.rc_odp_caps;
3625 resp.odp_caps.per_transport_caps.uc_odp_caps =
3626 attr.odp_caps.per_transport_caps.uc_odp_caps;
3627 resp.odp_caps.per_transport_caps.ud_odp_caps =
3628 attr.odp_caps.per_transport_caps.ud_odp_caps;
3629 resp.odp_caps.reserved = 0;
3630 #else
3631 memset(&resp.odp_caps, 0, sizeof(resp.odp_caps));
3632 #endif
3633 resp.response_length += sizeof(resp.odp_caps);
3634
3635 if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3636 goto end;
3637
3638 resp.timestamp_mask = attr.timestamp_mask;
3639 resp.response_length += sizeof(resp.timestamp_mask);
3640
3641 if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3642 goto end;
3643
3644 resp.hca_core_clock = attr.hca_core_clock;
3645 resp.response_length += sizeof(resp.hca_core_clock);
3646
3647 end:
3648 err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3649 if (err)
3650 return err;
3651
3652 return 0;
3653 }
ubuntu-zesty-kernel mirror