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of: MSI: Simplify irqdomain lookup
[linux/fpc-iii.git] / drivers / infiniband / core / uverbs_cmd.c
blob1c02deab068fbf1031d5b21db960feb9b06865c5
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 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
295 struct ib_device_attr dev_attr;
296 #endif
297 struct ib_ucontext *ucontext;
298 struct file *filp;
299 int ret;
300
301 if (out_len < sizeof resp)
302 return -ENOSPC;
303
304 if (copy_from_user(&cmd, buf, sizeof cmd))
305 return -EFAULT;
306
307 mutex_lock(&file->mutex);
308
309 if (file->ucontext) {
310 ret = -EINVAL;
311 goto err;
312 }
313
314 INIT_UDATA(&udata, buf + sizeof cmd,
315 (unsigned long) cmd.response + sizeof resp,
316 in_len - sizeof cmd, out_len - sizeof resp);
317
318 ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
319 if (IS_ERR(ucontext)) {
320 ret = PTR_ERR(ucontext);
321 goto err;
322 }
323
324 ucontext->device = ib_dev;
325 INIT_LIST_HEAD(&ucontext->pd_list);
326 INIT_LIST_HEAD(&ucontext->mr_list);
327 INIT_LIST_HEAD(&ucontext->mw_list);
328 INIT_LIST_HEAD(&ucontext->cq_list);
329 INIT_LIST_HEAD(&ucontext->qp_list);
330 INIT_LIST_HEAD(&ucontext->srq_list);
331 INIT_LIST_HEAD(&ucontext->ah_list);
332 INIT_LIST_HEAD(&ucontext->xrcd_list);
333 INIT_LIST_HEAD(&ucontext->rule_list);
334 rcu_read_lock();
335 ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
336 rcu_read_unlock();
337 ucontext->closing = 0;
338
339 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
340 ucontext->umem_tree = RB_ROOT;
341 init_rwsem(&ucontext->umem_rwsem);
342 ucontext->odp_mrs_count = 0;
343 INIT_LIST_HEAD(&ucontext->no_private_counters);
344
345 ret = ib_query_device(ib_dev, &dev_attr);
346 if (ret)
347 goto err_free;
348 if (!(dev_attr.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
349 ucontext->invalidate_range = NULL;
350
351 #endif
352
353 resp.num_comp_vectors = file->device->num_comp_vectors;
354
355 ret = get_unused_fd_flags(O_CLOEXEC);
356 if (ret < 0)
357 goto err_free;
358 resp.async_fd = ret;
359
360 filp = ib_uverbs_alloc_event_file(file, ib_dev, 1);
361 if (IS_ERR(filp)) {
362 ret = PTR_ERR(filp);
363 goto err_fd;
364 }
365
366 if (copy_to_user((void __user *) (unsigned long) cmd.response,
367 &resp, sizeof resp)) {
368 ret = -EFAULT;
369 goto err_file;
370 }
371
372 file->ucontext = ucontext;
373
374 fd_install(resp.async_fd, filp);
375
376 mutex_unlock(&file->mutex);
377
378 return in_len;
379
380 err_file:
381 ib_uverbs_free_async_event_file(file);
382 fput(filp);
383
384 err_fd:
385 put_unused_fd(resp.async_fd);
386
387 err_free:
388 put_pid(ucontext->tgid);
389 ib_dev->dealloc_ucontext(ucontext);
390
391 err:
392 mutex_unlock(&file->mutex);
393 return ret;
394 }
395
396 static void copy_query_dev_fields(struct ib_uverbs_file *file,
397 struct ib_device *ib_dev,
398 struct ib_uverbs_query_device_resp *resp,
399 struct ib_device_attr *attr)
400 {
401 resp->fw_ver = attr->fw_ver;
402 resp->node_guid = ib_dev->node_guid;
403 resp->sys_image_guid = attr->sys_image_guid;
404 resp->max_mr_size = attr->max_mr_size;
405 resp->page_size_cap = attr->page_size_cap;
406 resp->vendor_id = attr->vendor_id;
407 resp->vendor_part_id = attr->vendor_part_id;
408 resp->hw_ver = attr->hw_ver;
409 resp->max_qp = attr->max_qp;
410 resp->max_qp_wr = attr->max_qp_wr;
411 resp->device_cap_flags = attr->device_cap_flags;
412 resp->max_sge = attr->max_sge;
413 resp->max_sge_rd = attr->max_sge_rd;
414 resp->max_cq = attr->max_cq;
415 resp->max_cqe = attr->max_cqe;
416 resp->max_mr = attr->max_mr;
417 resp->max_pd = attr->max_pd;
418 resp->max_qp_rd_atom = attr->max_qp_rd_atom;
419 resp->max_ee_rd_atom = attr->max_ee_rd_atom;
420 resp->max_res_rd_atom = attr->max_res_rd_atom;
421 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom;
422 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom;
423 resp->atomic_cap = attr->atomic_cap;
424 resp->max_ee = attr->max_ee;
425 resp->max_rdd = attr->max_rdd;
426 resp->max_mw = attr->max_mw;
427 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
428 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
429 resp->max_mcast_grp = attr->max_mcast_grp;
430 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
431 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
432 resp->max_ah = attr->max_ah;
433 resp->max_fmr = attr->max_fmr;
434 resp->max_map_per_fmr = attr->max_map_per_fmr;
435 resp->max_srq = attr->max_srq;
436 resp->max_srq_wr = attr->max_srq_wr;
437 resp->max_srq_sge = attr->max_srq_sge;
438 resp->max_pkeys = attr->max_pkeys;
439 resp->local_ca_ack_delay = attr->local_ca_ack_delay;
440 resp->phys_port_cnt = ib_dev->phys_port_cnt;
441 }
442
443 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
444 struct ib_device *ib_dev,
445 const char __user *buf,
446 int in_len, int out_len)
447 {
448 struct ib_uverbs_query_device cmd;
449 struct ib_uverbs_query_device_resp resp;
450 struct ib_device_attr attr;
451 int ret;
452
453 if (out_len < sizeof resp)
454 return -ENOSPC;
455
456 if (copy_from_user(&cmd, buf, sizeof cmd))
457 return -EFAULT;
458
459 ret = ib_query_device(ib_dev, &attr);
460 if (ret)
461 return ret;
462
463 memset(&resp, 0, sizeof resp);
464 copy_query_dev_fields(file, ib_dev, &resp, &attr);
465
466 if (copy_to_user((void __user *) (unsigned long) cmd.response,
467 &resp, sizeof resp))
468 return -EFAULT;
469
470 return in_len;
471 }
472
473 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
474 struct ib_device *ib_dev,
475 const char __user *buf,
476 int in_len, int out_len)
477 {
478 struct ib_uverbs_query_port cmd;
479 struct ib_uverbs_query_port_resp resp;
480 struct ib_port_attr attr;
481 int ret;
482
483 if (out_len < sizeof resp)
484 return -ENOSPC;
485
486 if (copy_from_user(&cmd, buf, sizeof cmd))
487 return -EFAULT;
488
489 ret = ib_query_port(ib_dev, cmd.port_num, &attr);
490 if (ret)
491 return ret;
492
493 memset(&resp, 0, sizeof resp);
494
495 resp.state = attr.state;
496 resp.max_mtu = attr.max_mtu;
497 resp.active_mtu = attr.active_mtu;
498 resp.gid_tbl_len = attr.gid_tbl_len;
499 resp.port_cap_flags = attr.port_cap_flags;
500 resp.max_msg_sz = attr.max_msg_sz;
501 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
502 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
503 resp.pkey_tbl_len = attr.pkey_tbl_len;
504 resp.lid = attr.lid;
505 resp.sm_lid = attr.sm_lid;
506 resp.lmc = attr.lmc;
507 resp.max_vl_num = attr.max_vl_num;
508 resp.sm_sl = attr.sm_sl;
509 resp.subnet_timeout = attr.subnet_timeout;
510 resp.init_type_reply = attr.init_type_reply;
511 resp.active_width = attr.active_width;
512 resp.active_speed = attr.active_speed;
513 resp.phys_state = attr.phys_state;
514 resp.link_layer = rdma_port_get_link_layer(ib_dev,
515 cmd.port_num);
516
517 if (copy_to_user((void __user *) (unsigned long) cmd.response,
518 &resp, sizeof resp))
519 return -EFAULT;
520
521 return in_len;
522 }
523
524 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
525 struct ib_device *ib_dev,
526 const char __user *buf,
527 int in_len, int out_len)
528 {
529 struct ib_uverbs_alloc_pd cmd;
530 struct ib_uverbs_alloc_pd_resp resp;
531 struct ib_udata udata;
532 struct ib_uobject *uobj;
533 struct ib_pd *pd;
534 int ret;
535
536 if (out_len < sizeof resp)
537 return -ENOSPC;
538
539 if (copy_from_user(&cmd, buf, sizeof cmd))
540 return -EFAULT;
541
542 INIT_UDATA(&udata, buf + sizeof cmd,
543 (unsigned long) cmd.response + sizeof resp,
544 in_len - sizeof cmd, out_len - sizeof resp);
545
546 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
547 if (!uobj)
548 return -ENOMEM;
549
550 init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
551 down_write(&uobj->mutex);
552
553 pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
554 if (IS_ERR(pd)) {
555 ret = PTR_ERR(pd);
556 goto err;
557 }
558
559 pd->device = ib_dev;
560 pd->uobject = uobj;
561 pd->local_mr = NULL;
562 atomic_set(&pd->usecnt, 0);
563
564 uobj->object = pd;
565 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
566 if (ret)
567 goto err_idr;
568
569 memset(&resp, 0, sizeof resp);
570 resp.pd_handle = uobj->id;
571
572 if (copy_to_user((void __user *) (unsigned long) cmd.response,
573 &resp, sizeof resp)) {
574 ret = -EFAULT;
575 goto err_copy;
576 }
577
578 mutex_lock(&file->mutex);
579 list_add_tail(&uobj->list, &file->ucontext->pd_list);
580 mutex_unlock(&file->mutex);
581
582 uobj->live = 1;
583
584 up_write(&uobj->mutex);
585
586 return in_len;
587
588 err_copy:
589 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
590
591 err_idr:
592 ib_dealloc_pd(pd);
593
594 err:
595 put_uobj_write(uobj);
596 return ret;
597 }
598
599 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
600 struct ib_device *ib_dev,
601 const char __user *buf,
602 int in_len, int out_len)
603 {
604 struct ib_uverbs_dealloc_pd cmd;
605 struct ib_uobject *uobj;
606 struct ib_pd *pd;
607 int ret;
608
609 if (copy_from_user(&cmd, buf, sizeof cmd))
610 return -EFAULT;
611
612 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
613 if (!uobj)
614 return -EINVAL;
615 pd = uobj->object;
616
617 if (atomic_read(&pd->usecnt)) {
618 ret = -EBUSY;
619 goto err_put;
620 }
621
622 ret = pd->device->dealloc_pd(uobj->object);
623 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
624 if (ret)
625 goto err_put;
626
627 uobj->live = 0;
628 put_uobj_write(uobj);
629
630 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
631
632 mutex_lock(&file->mutex);
633 list_del(&uobj->list);
634 mutex_unlock(&file->mutex);
635
636 put_uobj(uobj);
637
638 return in_len;
639
640 err_put:
641 put_uobj_write(uobj);
642 return ret;
643 }
644
645 struct xrcd_table_entry {
646 struct rb_node node;
647 struct ib_xrcd *xrcd;
648 struct inode *inode;
649 };
650
651 static int xrcd_table_insert(struct ib_uverbs_device *dev,
652 struct inode *inode,
653 struct ib_xrcd *xrcd)
654 {
655 struct xrcd_table_entry *entry, *scan;
656 struct rb_node **p = &dev->xrcd_tree.rb_node;
657 struct rb_node *parent = NULL;
658
659 entry = kmalloc(sizeof *entry, GFP_KERNEL);
660 if (!entry)
661 return -ENOMEM;
662
663 entry->xrcd = xrcd;
664 entry->inode = inode;
665
666 while (*p) {
667 parent = *p;
668 scan = rb_entry(parent, struct xrcd_table_entry, node);
669
670 if (inode < scan->inode) {
671 p = &(*p)->rb_left;
672 } else if (inode > scan->inode) {
673 p = &(*p)->rb_right;
674 } else {
675 kfree(entry);
676 return -EEXIST;
677 }
678 }
679
680 rb_link_node(&entry->node, parent, p);
681 rb_insert_color(&entry->node, &dev->xrcd_tree);
682 igrab(inode);
683 return 0;
684 }
685
686 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
687 struct inode *inode)
688 {
689 struct xrcd_table_entry *entry;
690 struct rb_node *p = dev->xrcd_tree.rb_node;
691
692 while (p) {
693 entry = rb_entry(p, struct xrcd_table_entry, node);
694
695 if (inode < entry->inode)
696 p = p->rb_left;
697 else if (inode > entry->inode)
698 p = p->rb_right;
699 else
700 return entry;
701 }
702
703 return NULL;
704 }
705
706 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
707 {
708 struct xrcd_table_entry *entry;
709
710 entry = xrcd_table_search(dev, inode);
711 if (!entry)
712 return NULL;
713
714 return entry->xrcd;
715 }
716
717 static void xrcd_table_delete(struct ib_uverbs_device *dev,
718 struct inode *inode)
719 {
720 struct xrcd_table_entry *entry;
721
722 entry = xrcd_table_search(dev, inode);
723 if (entry) {
724 iput(inode);
725 rb_erase(&entry->node, &dev->xrcd_tree);
726 kfree(entry);
727 }
728 }
729
730 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
731 struct ib_device *ib_dev,
732 const char __user *buf, int in_len,
733 int out_len)
734 {
735 struct ib_uverbs_open_xrcd cmd;
736 struct ib_uverbs_open_xrcd_resp resp;
737 struct ib_udata udata;
738 struct ib_uxrcd_object *obj;
739 struct ib_xrcd *xrcd = NULL;
740 struct fd f = {NULL, 0};
741 struct inode *inode = NULL;
742 int ret = 0;
743 int new_xrcd = 0;
744
745 if (out_len < sizeof resp)
746 return -ENOSPC;
747
748 if (copy_from_user(&cmd, buf, sizeof cmd))
749 return -EFAULT;
750
751 INIT_UDATA(&udata, buf + sizeof cmd,
752 (unsigned long) cmd.response + sizeof resp,
753 in_len - sizeof cmd, out_len - sizeof resp);
754
755 mutex_lock(&file->device->xrcd_tree_mutex);
756
757 if (cmd.fd != -1) {
758 /* search for file descriptor */
759 f = fdget(cmd.fd);
760 if (!f.file) {
761 ret = -EBADF;
762 goto err_tree_mutex_unlock;
763 }
764
765 inode = file_inode(f.file);
766 xrcd = find_xrcd(file->device, inode);
767 if (!xrcd && !(cmd.oflags & O_CREAT)) {
768 /* no file descriptor. Need CREATE flag */
769 ret = -EAGAIN;
770 goto err_tree_mutex_unlock;
771 }
772
773 if (xrcd && cmd.oflags & O_EXCL) {
774 ret = -EINVAL;
775 goto err_tree_mutex_unlock;
776 }
777 }
778
779 obj = kmalloc(sizeof *obj, GFP_KERNEL);
780 if (!obj) {
781 ret = -ENOMEM;
782 goto err_tree_mutex_unlock;
783 }
784
785 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
786
787 down_write(&obj->uobject.mutex);
788
789 if (!xrcd) {
790 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
791 if (IS_ERR(xrcd)) {
792 ret = PTR_ERR(xrcd);
793 goto err;
794 }
795
796 xrcd->inode = inode;
797 xrcd->device = ib_dev;
798 atomic_set(&xrcd->usecnt, 0);
799 mutex_init(&xrcd->tgt_qp_mutex);
800 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
801 new_xrcd = 1;
802 }
803
804 atomic_set(&obj->refcnt, 0);
805 obj->uobject.object = xrcd;
806 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
807 if (ret)
808 goto err_idr;
809
810 memset(&resp, 0, sizeof resp);
811 resp.xrcd_handle = obj->uobject.id;
812
813 if (inode) {
814 if (new_xrcd) {
815 /* create new inode/xrcd table entry */
816 ret = xrcd_table_insert(file->device, inode, xrcd);
817 if (ret)
818 goto err_insert_xrcd;
819 }
820 atomic_inc(&xrcd->usecnt);
821 }
822
823 if (copy_to_user((void __user *) (unsigned long) cmd.response,
824 &resp, sizeof resp)) {
825 ret = -EFAULT;
826 goto err_copy;
827 }
828
829 if (f.file)
830 fdput(f);
831
832 mutex_lock(&file->mutex);
833 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
834 mutex_unlock(&file->mutex);
835
836 obj->uobject.live = 1;
837 up_write(&obj->uobject.mutex);
838
839 mutex_unlock(&file->device->xrcd_tree_mutex);
840 return in_len;
841
842 err_copy:
843 if (inode) {
844 if (new_xrcd)
845 xrcd_table_delete(file->device, inode);
846 atomic_dec(&xrcd->usecnt);
847 }
848
849 err_insert_xrcd:
850 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
851
852 err_idr:
853 ib_dealloc_xrcd(xrcd);
854
855 err:
856 put_uobj_write(&obj->uobject);
857
858 err_tree_mutex_unlock:
859 if (f.file)
860 fdput(f);
861
862 mutex_unlock(&file->device->xrcd_tree_mutex);
863
864 return ret;
865 }
866
867 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
868 struct ib_device *ib_dev,
869 const char __user *buf, int in_len,
870 int out_len)
871 {
872 struct ib_uverbs_close_xrcd cmd;
873 struct ib_uobject *uobj;
874 struct ib_xrcd *xrcd = NULL;
875 struct inode *inode = NULL;
876 struct ib_uxrcd_object *obj;
877 int live;
878 int ret = 0;
879
880 if (copy_from_user(&cmd, buf, sizeof cmd))
881 return -EFAULT;
882
883 mutex_lock(&file->device->xrcd_tree_mutex);
884 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
885 if (!uobj) {
886 ret = -EINVAL;
887 goto out;
888 }
889
890 xrcd = uobj->object;
891 inode = xrcd->inode;
892 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
893 if (atomic_read(&obj->refcnt)) {
894 put_uobj_write(uobj);
895 ret = -EBUSY;
896 goto out;
897 }
898
899 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
900 ret = ib_dealloc_xrcd(uobj->object);
901 if (!ret)
902 uobj->live = 0;
903 }
904
905 live = uobj->live;
906 if (inode && ret)
907 atomic_inc(&xrcd->usecnt);
908
909 put_uobj_write(uobj);
910
911 if (ret)
912 goto out;
913
914 if (inode && !live)
915 xrcd_table_delete(file->device, inode);
916
917 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
918 mutex_lock(&file->mutex);
919 list_del(&uobj->list);
920 mutex_unlock(&file->mutex);
921
922 put_uobj(uobj);
923 ret = in_len;
924
925 out:
926 mutex_unlock(&file->device->xrcd_tree_mutex);
927 return ret;
928 }
929
930 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
931 struct ib_xrcd *xrcd)
932 {
933 struct inode *inode;
934
935 inode = xrcd->inode;
936 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
937 return;
938
939 ib_dealloc_xrcd(xrcd);
940
941 if (inode)
942 xrcd_table_delete(dev, inode);
943 }
944
945 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
946 struct ib_device *ib_dev,
947 const char __user *buf, int in_len,
948 int out_len)
949 {
950 struct ib_uverbs_reg_mr cmd;
951 struct ib_uverbs_reg_mr_resp resp;
952 struct ib_udata udata;
953 struct ib_uobject *uobj;
954 struct ib_pd *pd;
955 struct ib_mr *mr;
956 int ret;
957
958 if (out_len < sizeof resp)
959 return -ENOSPC;
960
961 if (copy_from_user(&cmd, buf, sizeof cmd))
962 return -EFAULT;
963
964 INIT_UDATA(&udata, buf + sizeof cmd,
965 (unsigned long) cmd.response + sizeof resp,
966 in_len - sizeof cmd, out_len - sizeof resp);
967
968 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
969 return -EINVAL;
970
971 ret = ib_check_mr_access(cmd.access_flags);
972 if (ret)
973 return ret;
974
975 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
976 if (!uobj)
977 return -ENOMEM;
978
979 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
980 down_write(&uobj->mutex);
981
982 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
983 if (!pd) {
984 ret = -EINVAL;
985 goto err_free;
986 }
987
988 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
989 struct ib_device_attr attr;
990
991 ret = ib_query_device(pd->device, &attr);
992 if (ret || !(attr.device_cap_flags &
993 IB_DEVICE_ON_DEMAND_PAGING)) {
994 pr_debug("ODP support not available\n");
995 ret = -EINVAL;
996 goto err_put;
997 }
998 }
999
1000 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
1001 cmd.access_flags, &udata);
1002 if (IS_ERR(mr)) {
1003 ret = PTR_ERR(mr);
1004 goto err_put;
1005 }
1006
1007 mr->device = pd->device;
1008 mr->pd = pd;
1009 mr->uobject = uobj;
1010 atomic_inc(&pd->usecnt);
1011 atomic_set(&mr->usecnt, 0);
1012
1013 uobj->object = mr;
1014 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
1015 if (ret)
1016 goto err_unreg;
1017
1018 memset(&resp, 0, sizeof resp);
1019 resp.lkey = mr->lkey;
1020 resp.rkey = mr->rkey;
1021 resp.mr_handle = uobj->id;
1022
1023 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1024 &resp, sizeof resp)) {
1025 ret = -EFAULT;
1026 goto err_copy;
1027 }
1028
1029 put_pd_read(pd);
1030
1031 mutex_lock(&file->mutex);
1032 list_add_tail(&uobj->list, &file->ucontext->mr_list);
1033 mutex_unlock(&file->mutex);
1034
1035 uobj->live = 1;
1036
1037 up_write(&uobj->mutex);
1038
1039 return in_len;
1040
1041 err_copy:
1042 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1043
1044 err_unreg:
1045 ib_dereg_mr(mr);
1046
1047 err_put:
1048 put_pd_read(pd);
1049
1050 err_free:
1051 put_uobj_write(uobj);
1052 return ret;
1053 }
1054
1055 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
1056 struct ib_device *ib_dev,
1057 const char __user *buf, int in_len,
1058 int out_len)
1059 {
1060 struct ib_uverbs_rereg_mr cmd;
1061 struct ib_uverbs_rereg_mr_resp resp;
1062 struct ib_udata udata;
1063 struct ib_pd *pd = NULL;
1064 struct ib_mr *mr;
1065 struct ib_pd *old_pd;
1066 int ret;
1067 struct ib_uobject *uobj;
1068
1069 if (out_len < sizeof(resp))
1070 return -ENOSPC;
1071
1072 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1073 return -EFAULT;
1074
1075 INIT_UDATA(&udata, buf + sizeof(cmd),
1076 (unsigned long) cmd.response + sizeof(resp),
1077 in_len - sizeof(cmd), out_len - sizeof(resp));
1078
1079 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
1080 return -EINVAL;
1081
1082 if ((cmd.flags & IB_MR_REREG_TRANS) &&
1083 (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
1084 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
1085 return -EINVAL;
1086
1087 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle,
1088 file->ucontext);
1089
1090 if (!uobj)
1091 return -EINVAL;
1092
1093 mr = uobj->object;
1094
1095 if (cmd.flags & IB_MR_REREG_ACCESS) {
1096 ret = ib_check_mr_access(cmd.access_flags);
1097 if (ret)
1098 goto put_uobjs;
1099 }
1100
1101 if (cmd.flags & IB_MR_REREG_PD) {
1102 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1103 if (!pd) {
1104 ret = -EINVAL;
1105 goto put_uobjs;
1106 }
1107 }
1108
1109 if (atomic_read(&mr->usecnt)) {
1110 ret = -EBUSY;
1111 goto put_uobj_pd;
1112 }
1113
1114 old_pd = mr->pd;
1115 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
1116 cmd.length, cmd.hca_va,
1117 cmd.access_flags, pd, &udata);
1118 if (!ret) {
1119 if (cmd.flags & IB_MR_REREG_PD) {
1120 atomic_inc(&pd->usecnt);
1121 mr->pd = pd;
1122 atomic_dec(&old_pd->usecnt);
1123 }
1124 } else {
1125 goto put_uobj_pd;
1126 }
1127
1128 memset(&resp, 0, sizeof(resp));
1129 resp.lkey = mr->lkey;
1130 resp.rkey = mr->rkey;
1131
1132 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1133 &resp, sizeof(resp)))
1134 ret = -EFAULT;
1135 else
1136 ret = in_len;
1137
1138 put_uobj_pd:
1139 if (cmd.flags & IB_MR_REREG_PD)
1140 put_pd_read(pd);
1141
1142 put_uobjs:
1143
1144 put_uobj_write(mr->uobject);
1145
1146 return ret;
1147 }
1148
1149 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1150 struct ib_device *ib_dev,
1151 const char __user *buf, int in_len,
1152 int out_len)
1153 {
1154 struct ib_uverbs_dereg_mr cmd;
1155 struct ib_mr *mr;
1156 struct ib_uobject *uobj;
1157 int ret = -EINVAL;
1158
1159 if (copy_from_user(&cmd, buf, sizeof cmd))
1160 return -EFAULT;
1161
1162 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1163 if (!uobj)
1164 return -EINVAL;
1165
1166 mr = uobj->object;
1167
1168 ret = ib_dereg_mr(mr);
1169 if (!ret)
1170 uobj->live = 0;
1171
1172 put_uobj_write(uobj);
1173
1174 if (ret)
1175 return ret;
1176
1177 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1178
1179 mutex_lock(&file->mutex);
1180 list_del(&uobj->list);
1181 mutex_unlock(&file->mutex);
1182
1183 put_uobj(uobj);
1184
1185 return in_len;
1186 }
1187
1188 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
1189 struct ib_device *ib_dev,
1190 const char __user *buf, int in_len,
1191 int out_len)
1192 {
1193 struct ib_uverbs_alloc_mw cmd;
1194 struct ib_uverbs_alloc_mw_resp resp;
1195 struct ib_uobject *uobj;
1196 struct ib_pd *pd;
1197 struct ib_mw *mw;
1198 int ret;
1199
1200 if (out_len < sizeof(resp))
1201 return -ENOSPC;
1202
1203 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1204 return -EFAULT;
1205
1206 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
1207 if (!uobj)
1208 return -ENOMEM;
1209
1210 init_uobj(uobj, 0, file->ucontext, &mw_lock_class);
1211 down_write(&uobj->mutex);
1212
1213 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1214 if (!pd) {
1215 ret = -EINVAL;
1216 goto err_free;
1217 }
1218
1219 mw = pd->device->alloc_mw(pd, cmd.mw_type);
1220 if (IS_ERR(mw)) {
1221 ret = PTR_ERR(mw);
1222 goto err_put;
1223 }
1224
1225 mw->device = pd->device;
1226 mw->pd = pd;
1227 mw->uobject = uobj;
1228 atomic_inc(&pd->usecnt);
1229
1230 uobj->object = mw;
1231 ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj);
1232 if (ret)
1233 goto err_unalloc;
1234
1235 memset(&resp, 0, sizeof(resp));
1236 resp.rkey = mw->rkey;
1237 resp.mw_handle = uobj->id;
1238
1239 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1240 &resp, sizeof(resp))) {
1241 ret = -EFAULT;
1242 goto err_copy;
1243 }
1244
1245 put_pd_read(pd);
1246
1247 mutex_lock(&file->mutex);
1248 list_add_tail(&uobj->list, &file->ucontext->mw_list);
1249 mutex_unlock(&file->mutex);
1250
1251 uobj->live = 1;
1252
1253 up_write(&uobj->mutex);
1254
1255 return in_len;
1256
1257 err_copy:
1258 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1259
1260 err_unalloc:
1261 ib_dealloc_mw(mw);
1262
1263 err_put:
1264 put_pd_read(pd);
1265
1266 err_free:
1267 put_uobj_write(uobj);
1268 return ret;
1269 }
1270
1271 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
1272 struct ib_device *ib_dev,
1273 const char __user *buf, int in_len,
1274 int out_len)
1275 {
1276 struct ib_uverbs_dealloc_mw cmd;
1277 struct ib_mw *mw;
1278 struct ib_uobject *uobj;
1279 int ret = -EINVAL;
1280
1281 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1282 return -EFAULT;
1283
1284 uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext);
1285 if (!uobj)
1286 return -EINVAL;
1287
1288 mw = uobj->object;
1289
1290 ret = ib_dealloc_mw(mw);
1291 if (!ret)
1292 uobj->live = 0;
1293
1294 put_uobj_write(uobj);
1295
1296 if (ret)
1297 return ret;
1298
1299 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1300
1301 mutex_lock(&file->mutex);
1302 list_del(&uobj->list);
1303 mutex_unlock(&file->mutex);
1304
1305 put_uobj(uobj);
1306
1307 return in_len;
1308 }
1309
1310 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1311 struct ib_device *ib_dev,
1312 const char __user *buf, int in_len,
1313 int out_len)
1314 {
1315 struct ib_uverbs_create_comp_channel cmd;
1316 struct ib_uverbs_create_comp_channel_resp resp;
1317 struct file *filp;
1318 int ret;
1319
1320 if (out_len < sizeof resp)
1321 return -ENOSPC;
1322
1323 if (copy_from_user(&cmd, buf, sizeof cmd))
1324 return -EFAULT;
1325
1326 ret = get_unused_fd_flags(O_CLOEXEC);
1327 if (ret < 0)
1328 return ret;
1329 resp.fd = ret;
1330
1331 filp = ib_uverbs_alloc_event_file(file, ib_dev, 0);
1332 if (IS_ERR(filp)) {
1333 put_unused_fd(resp.fd);
1334 return PTR_ERR(filp);
1335 }
1336
1337 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1338 &resp, sizeof resp)) {
1339 put_unused_fd(resp.fd);
1340 fput(filp);
1341 return -EFAULT;
1342 }
1343
1344 fd_install(resp.fd, filp);
1345 return in_len;
1346 }
1347
1348 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
1349 struct ib_device *ib_dev,
1350 struct ib_udata *ucore,
1351 struct ib_udata *uhw,
1352 struct ib_uverbs_ex_create_cq *cmd,
1353 size_t cmd_sz,
1354 int (*cb)(struct ib_uverbs_file *file,
1355 struct ib_ucq_object *obj,
1356 struct ib_uverbs_ex_create_cq_resp *resp,
1357 struct ib_udata *udata,
1358 void *context),
1359 void *context)
1360 {
1361 struct ib_ucq_object *obj;
1362 struct ib_uverbs_event_file *ev_file = NULL;
1363 struct ib_cq *cq;
1364 int ret;
1365 struct ib_uverbs_ex_create_cq_resp resp;
1366 struct ib_cq_init_attr attr = {};
1367
1368 if (cmd->comp_vector >= file->device->num_comp_vectors)
1369 return ERR_PTR(-EINVAL);
1370
1371 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1372 if (!obj)
1373 return ERR_PTR(-ENOMEM);
1374
1375 init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class);
1376 down_write(&obj->uobject.mutex);
1377
1378 if (cmd->comp_channel >= 0) {
1379 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel);
1380 if (!ev_file) {
1381 ret = -EINVAL;
1382 goto err;
1383 }
1384 }
1385
1386 obj->uverbs_file = file;
1387 obj->comp_events_reported = 0;
1388 obj->async_events_reported = 0;
1389 INIT_LIST_HEAD(&obj->comp_list);
1390 INIT_LIST_HEAD(&obj->async_list);
1391
1392 attr.cqe = cmd->cqe;
1393 attr.comp_vector = cmd->comp_vector;
1394
1395 if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1396 attr.flags = cmd->flags;
1397
1398 cq = ib_dev->create_cq(ib_dev, &attr,
1399 file->ucontext, uhw);
1400 if (IS_ERR(cq)) {
1401 ret = PTR_ERR(cq);
1402 goto err_file;
1403 }
1404
1405 cq->device = ib_dev;
1406 cq->uobject = &obj->uobject;
1407 cq->comp_handler = ib_uverbs_comp_handler;
1408 cq->event_handler = ib_uverbs_cq_event_handler;
1409 cq->cq_context = ev_file;
1410 atomic_set(&cq->usecnt, 0);
1411
1412 obj->uobject.object = cq;
1413 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1414 if (ret)
1415 goto err_free;
1416
1417 memset(&resp, 0, sizeof resp);
1418 resp.base.cq_handle = obj->uobject.id;
1419 resp.base.cqe = cq->cqe;
1420
1421 resp.response_length = offsetof(typeof(resp), response_length) +
1422 sizeof(resp.response_length);
1423
1424 ret = cb(file, obj, &resp, ucore, context);
1425 if (ret)
1426 goto err_cb;
1427
1428 mutex_lock(&file->mutex);
1429 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1430 mutex_unlock(&file->mutex);
1431
1432 obj->uobject.live = 1;
1433
1434 up_write(&obj->uobject.mutex);
1435
1436 return obj;
1437
1438 err_cb:
1439 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1440
1441 err_free:
1442 ib_destroy_cq(cq);
1443
1444 err_file:
1445 if (ev_file)
1446 ib_uverbs_release_ucq(file, ev_file, obj);
1447
1448 err:
1449 put_uobj_write(&obj->uobject);
1450
1451 return ERR_PTR(ret);
1452 }
1453
1454 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1455 struct ib_ucq_object *obj,
1456 struct ib_uverbs_ex_create_cq_resp *resp,
1457 struct ib_udata *ucore, void *context)
1458 {
1459 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1460 return -EFAULT;
1461
1462 return 0;
1463 }
1464
1465 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1466 struct ib_device *ib_dev,
1467 const char __user *buf, int in_len,
1468 int out_len)
1469 {
1470 struct ib_uverbs_create_cq cmd;
1471 struct ib_uverbs_ex_create_cq cmd_ex;
1472 struct ib_uverbs_create_cq_resp resp;
1473 struct ib_udata ucore;
1474 struct ib_udata uhw;
1475 struct ib_ucq_object *obj;
1476
1477 if (out_len < sizeof(resp))
1478 return -ENOSPC;
1479
1480 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1481 return -EFAULT;
1482
1483 INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), sizeof(resp));
1484
1485 INIT_UDATA(&uhw, buf + sizeof(cmd),
1486 (unsigned long)cmd.response + sizeof(resp),
1487 in_len - sizeof(cmd), out_len - sizeof(resp));
1488
1489 memset(&cmd_ex, 0, sizeof(cmd_ex));
1490 cmd_ex.user_handle = cmd.user_handle;
1491 cmd_ex.cqe = cmd.cqe;
1492 cmd_ex.comp_vector = cmd.comp_vector;
1493 cmd_ex.comp_channel = cmd.comp_channel;
1494
1495 obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1496 offsetof(typeof(cmd_ex), comp_channel) +
1497 sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1498 NULL);
1499
1500 if (IS_ERR(obj))
1501 return PTR_ERR(obj);
1502
1503 return in_len;
1504 }
1505
1506 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1507 struct ib_ucq_object *obj,
1508 struct ib_uverbs_ex_create_cq_resp *resp,
1509 struct ib_udata *ucore, void *context)
1510 {
1511 if (ib_copy_to_udata(ucore, resp, resp->response_length))
1512 return -EFAULT;
1513
1514 return 0;
1515 }
1516
1517 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1518 struct ib_device *ib_dev,
1519 struct ib_udata *ucore,
1520 struct ib_udata *uhw)
1521 {
1522 struct ib_uverbs_ex_create_cq_resp resp;
1523 struct ib_uverbs_ex_create_cq cmd;
1524 struct ib_ucq_object *obj;
1525 int err;
1526
1527 if (ucore->inlen < sizeof(cmd))
1528 return -EINVAL;
1529
1530 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1531 if (err)
1532 return err;
1533
1534 if (cmd.comp_mask)
1535 return -EINVAL;
1536
1537 if (cmd.reserved)
1538 return -EINVAL;
1539
1540 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1541 sizeof(resp.response_length)))
1542 return -ENOSPC;
1543
1544 obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1545 min(ucore->inlen, sizeof(cmd)),
1546 ib_uverbs_ex_create_cq_cb, NULL);
1547
1548 if (IS_ERR(obj))
1549 return PTR_ERR(obj);
1550
1551 return 0;
1552 }
1553
1554 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1555 struct ib_device *ib_dev,
1556 const char __user *buf, int in_len,
1557 int out_len)
1558 {
1559 struct ib_uverbs_resize_cq cmd;
1560 struct ib_uverbs_resize_cq_resp resp;
1561 struct ib_udata udata;
1562 struct ib_cq *cq;
1563 int ret = -EINVAL;
1564
1565 if (copy_from_user(&cmd, buf, sizeof cmd))
1566 return -EFAULT;
1567
1568 INIT_UDATA(&udata, buf + sizeof cmd,
1569 (unsigned long) cmd.response + sizeof resp,
1570 in_len - sizeof cmd, out_len - sizeof resp);
1571
1572 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1573 if (!cq)
1574 return -EINVAL;
1575
1576 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1577 if (ret)
1578 goto out;
1579
1580 resp.cqe = cq->cqe;
1581
1582 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1583 &resp, sizeof resp.cqe))
1584 ret = -EFAULT;
1585
1586 out:
1587 put_cq_read(cq);
1588
1589 return ret ? ret : in_len;
1590 }
1591
1592 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1593 {
1594 struct ib_uverbs_wc tmp;
1595
1596 tmp.wr_id = wc->wr_id;
1597 tmp.status = wc->status;
1598 tmp.opcode = wc->opcode;
1599 tmp.vendor_err = wc->vendor_err;
1600 tmp.byte_len = wc->byte_len;
1601 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1602 tmp.qp_num = wc->qp->qp_num;
1603 tmp.src_qp = wc->src_qp;
1604 tmp.wc_flags = wc->wc_flags;
1605 tmp.pkey_index = wc->pkey_index;
1606 tmp.slid = wc->slid;
1607 tmp.sl = wc->sl;
1608 tmp.dlid_path_bits = wc->dlid_path_bits;
1609 tmp.port_num = wc->port_num;
1610 tmp.reserved = 0;
1611
1612 if (copy_to_user(dest, &tmp, sizeof tmp))
1613 return -EFAULT;
1614
1615 return 0;
1616 }
1617
1618 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1619 struct ib_device *ib_dev,
1620 const char __user *buf, int in_len,
1621 int out_len)
1622 {
1623 struct ib_uverbs_poll_cq cmd;
1624 struct ib_uverbs_poll_cq_resp resp;
1625 u8 __user *header_ptr;
1626 u8 __user *data_ptr;
1627 struct ib_cq *cq;
1628 struct ib_wc wc;
1629 int ret;
1630
1631 if (copy_from_user(&cmd, buf, sizeof cmd))
1632 return -EFAULT;
1633
1634 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1635 if (!cq)
1636 return -EINVAL;
1637
1638 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1639 header_ptr = (void __user *)(unsigned long) cmd.response;
1640 data_ptr = header_ptr + sizeof resp;
1641
1642 memset(&resp, 0, sizeof resp);
1643 while (resp.count < cmd.ne) {
1644 ret = ib_poll_cq(cq, 1, &wc);
1645 if (ret < 0)
1646 goto out_put;
1647 if (!ret)
1648 break;
1649
1650 ret = copy_wc_to_user(data_ptr, &wc);
1651 if (ret)
1652 goto out_put;
1653
1654 data_ptr += sizeof(struct ib_uverbs_wc);
1655 ++resp.count;
1656 }
1657
1658 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1659 ret = -EFAULT;
1660 goto out_put;
1661 }
1662
1663 ret = in_len;
1664
1665 out_put:
1666 put_cq_read(cq);
1667 return ret;
1668 }
1669
1670 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1671 struct ib_device *ib_dev,
1672 const char __user *buf, int in_len,
1673 int out_len)
1674 {
1675 struct ib_uverbs_req_notify_cq cmd;
1676 struct ib_cq *cq;
1677
1678 if (copy_from_user(&cmd, buf, sizeof cmd))
1679 return -EFAULT;
1680
1681 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1682 if (!cq)
1683 return -EINVAL;
1684
1685 ib_req_notify_cq(cq, cmd.solicited_only ?
1686 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1687
1688 put_cq_read(cq);
1689
1690 return in_len;
1691 }
1692
1693 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1694 struct ib_device *ib_dev,
1695 const char __user *buf, int in_len,
1696 int out_len)
1697 {
1698 struct ib_uverbs_destroy_cq cmd;
1699 struct ib_uverbs_destroy_cq_resp resp;
1700 struct ib_uobject *uobj;
1701 struct ib_cq *cq;
1702 struct ib_ucq_object *obj;
1703 struct ib_uverbs_event_file *ev_file;
1704 int ret = -EINVAL;
1705
1706 if (copy_from_user(&cmd, buf, sizeof cmd))
1707 return -EFAULT;
1708
1709 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1710 if (!uobj)
1711 return -EINVAL;
1712 cq = uobj->object;
1713 ev_file = cq->cq_context;
1714 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1715
1716 ret = ib_destroy_cq(cq);
1717 if (!ret)
1718 uobj->live = 0;
1719
1720 put_uobj_write(uobj);
1721
1722 if (ret)
1723 return ret;
1724
1725 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1726
1727 mutex_lock(&file->mutex);
1728 list_del(&uobj->list);
1729 mutex_unlock(&file->mutex);
1730
1731 ib_uverbs_release_ucq(file, ev_file, obj);
1732
1733 memset(&resp, 0, sizeof resp);
1734 resp.comp_events_reported = obj->comp_events_reported;
1735 resp.async_events_reported = obj->async_events_reported;
1736
1737 put_uobj(uobj);
1738
1739 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1740 &resp, sizeof resp))
1741 return -EFAULT;
1742
1743 return in_len;
1744 }
1745
1746 static int create_qp(struct ib_uverbs_file *file,
1747 struct ib_udata *ucore,
1748 struct ib_udata *uhw,
1749 struct ib_uverbs_ex_create_qp *cmd,
1750 size_t cmd_sz,
1751 int (*cb)(struct ib_uverbs_file *file,
1752 struct ib_uverbs_ex_create_qp_resp *resp,
1753 struct ib_udata *udata),
1754 void *context)
1755 {
1756 struct ib_uqp_object *obj;
1757 struct ib_device *device;
1758 struct ib_pd *pd = NULL;
1759 struct ib_xrcd *xrcd = NULL;
1760 struct ib_uobject *uninitialized_var(xrcd_uobj);
1761 struct ib_cq *scq = NULL, *rcq = NULL;
1762 struct ib_srq *srq = NULL;
1763 struct ib_qp *qp;
1764 char *buf;
1765 struct ib_qp_init_attr attr;
1766 struct ib_uverbs_ex_create_qp_resp resp;
1767 int ret;
1768
1769 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1770 return -EPERM;
1771
1772 obj = kzalloc(sizeof *obj, GFP_KERNEL);
1773 if (!obj)
1774 return -ENOMEM;
1775
1776 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext,
1777 &qp_lock_class);
1778 down_write(&obj->uevent.uobject.mutex);
1779
1780 if (cmd->qp_type == IB_QPT_XRC_TGT) {
1781 xrcd = idr_read_xrcd(cmd->pd_handle, file->ucontext,
1782 &xrcd_uobj);
1783 if (!xrcd) {
1784 ret = -EINVAL;
1785 goto err_put;
1786 }
1787 device = xrcd->device;
1788 } else {
1789 if (cmd->qp_type == IB_QPT_XRC_INI) {
1790 cmd->max_recv_wr = 0;
1791 cmd->max_recv_sge = 0;
1792 } else {
1793 if (cmd->is_srq) {
1794 srq = idr_read_srq(cmd->srq_handle,
1795 file->ucontext);
1796 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1797 ret = -EINVAL;
1798 goto err_put;
1799 }
1800 }
1801
1802 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1803 rcq = idr_read_cq(cmd->recv_cq_handle,
1804 file->ucontext, 0);
1805 if (!rcq) {
1806 ret = -EINVAL;
1807 goto err_put;
1808 }
1809 }
1810 }
1811
1812 scq = idr_read_cq(cmd->send_cq_handle, file->ucontext, !!rcq);
1813 rcq = rcq ?: scq;
1814 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
1815 if (!pd || !scq) {
1816 ret = -EINVAL;
1817 goto err_put;
1818 }
1819
1820 device = pd->device;
1821 }
1822
1823 attr.event_handler = ib_uverbs_qp_event_handler;
1824 attr.qp_context = file;
1825 attr.send_cq = scq;
1826 attr.recv_cq = rcq;
1827 attr.srq = srq;
1828 attr.xrcd = xrcd;
1829 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1830 IB_SIGNAL_REQ_WR;
1831 attr.qp_type = cmd->qp_type;
1832 attr.create_flags = 0;
1833
1834 attr.cap.max_send_wr = cmd->max_send_wr;
1835 attr.cap.max_recv_wr = cmd->max_recv_wr;
1836 attr.cap.max_send_sge = cmd->max_send_sge;
1837 attr.cap.max_recv_sge = cmd->max_recv_sge;
1838 attr.cap.max_inline_data = cmd->max_inline_data;
1839
1840 obj->uevent.events_reported = 0;
1841 INIT_LIST_HEAD(&obj->uevent.event_list);
1842 INIT_LIST_HEAD(&obj->mcast_list);
1843
1844 if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1845 sizeof(cmd->create_flags))
1846 attr.create_flags = cmd->create_flags;
1847
1848 if (attr.create_flags & ~IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) {
1849 ret = -EINVAL;
1850 goto err_put;
1851 }
1852
1853 buf = (void *)cmd + sizeof(*cmd);
1854 if (cmd_sz > sizeof(*cmd))
1855 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1856 cmd_sz - sizeof(*cmd) - 1))) {
1857 ret = -EINVAL;
1858 goto err_put;
1859 }
1860
1861 if (cmd->qp_type == IB_QPT_XRC_TGT)
1862 qp = ib_create_qp(pd, &attr);
1863 else
1864 qp = device->create_qp(pd, &attr, uhw);
1865
1866 if (IS_ERR(qp)) {
1867 ret = PTR_ERR(qp);
1868 goto err_put;
1869 }
1870
1871 if (cmd->qp_type != IB_QPT_XRC_TGT) {
1872 qp->real_qp = qp;
1873 qp->device = device;
1874 qp->pd = pd;
1875 qp->send_cq = attr.send_cq;
1876 qp->recv_cq = attr.recv_cq;
1877 qp->srq = attr.srq;
1878 qp->event_handler = attr.event_handler;
1879 qp->qp_context = attr.qp_context;
1880 qp->qp_type = attr.qp_type;
1881 atomic_set(&qp->usecnt, 0);
1882 atomic_inc(&pd->usecnt);
1883 atomic_inc(&attr.send_cq->usecnt);
1884 if (attr.recv_cq)
1885 atomic_inc(&attr.recv_cq->usecnt);
1886 if (attr.srq)
1887 atomic_inc(&attr.srq->usecnt);
1888 }
1889 qp->uobject = &obj->uevent.uobject;
1890
1891 obj->uevent.uobject.object = qp;
1892 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1893 if (ret)
1894 goto err_destroy;
1895
1896 memset(&resp, 0, sizeof resp);
1897 resp.base.qpn = qp->qp_num;
1898 resp.base.qp_handle = obj->uevent.uobject.id;
1899 resp.base.max_recv_sge = attr.cap.max_recv_sge;
1900 resp.base.max_send_sge = attr.cap.max_send_sge;
1901 resp.base.max_recv_wr = attr.cap.max_recv_wr;
1902 resp.base.max_send_wr = attr.cap.max_send_wr;
1903 resp.base.max_inline_data = attr.cap.max_inline_data;
1904
1905 resp.response_length = offsetof(typeof(resp), response_length) +
1906 sizeof(resp.response_length);
1907
1908 ret = cb(file, &resp, ucore);
1909 if (ret)
1910 goto err_cb;
1911
1912 if (xrcd) {
1913 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1914 uobject);
1915 atomic_inc(&obj->uxrcd->refcnt);
1916 put_xrcd_read(xrcd_uobj);
1917 }
1918
1919 if (pd)
1920 put_pd_read(pd);
1921 if (scq)
1922 put_cq_read(scq);
1923 if (rcq && rcq != scq)
1924 put_cq_read(rcq);
1925 if (srq)
1926 put_srq_read(srq);
1927
1928 mutex_lock(&file->mutex);
1929 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1930 mutex_unlock(&file->mutex);
1931
1932 obj->uevent.uobject.live = 1;
1933
1934 up_write(&obj->uevent.uobject.mutex);
1935
1936 return 0;
1937 err_cb:
1938 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1939
1940 err_destroy:
1941 ib_destroy_qp(qp);
1942
1943 err_put:
1944 if (xrcd)
1945 put_xrcd_read(xrcd_uobj);
1946 if (pd)
1947 put_pd_read(pd);
1948 if (scq)
1949 put_cq_read(scq);
1950 if (rcq && rcq != scq)
1951 put_cq_read(rcq);
1952 if (srq)
1953 put_srq_read(srq);
1954
1955 put_uobj_write(&obj->uevent.uobject);
1956 return ret;
1957 }
1958
1959 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1960 struct ib_uverbs_ex_create_qp_resp *resp,
1961 struct ib_udata *ucore)
1962 {
1963 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1964 return -EFAULT;
1965
1966 return 0;
1967 }
1968
1969 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1970 struct ib_device *ib_dev,
1971 const char __user *buf, int in_len,
1972 int out_len)
1973 {
1974 struct ib_uverbs_create_qp cmd;
1975 struct ib_uverbs_ex_create_qp cmd_ex;
1976 struct ib_udata ucore;
1977 struct ib_udata uhw;
1978 ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1979 int err;
1980
1981 if (out_len < resp_size)
1982 return -ENOSPC;
1983
1984 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1985 return -EFAULT;
1986
1987 INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd),
1988 resp_size);
1989 INIT_UDATA(&uhw, buf + sizeof(cmd),
1990 (unsigned long)cmd.response + resp_size,
1991 in_len - sizeof(cmd), out_len - resp_size);
1992
1993 memset(&cmd_ex, 0, sizeof(cmd_ex));
1994 cmd_ex.user_handle = cmd.user_handle;
1995 cmd_ex.pd_handle = cmd.pd_handle;
1996 cmd_ex.send_cq_handle = cmd.send_cq_handle;
1997 cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1998 cmd_ex.srq_handle = cmd.srq_handle;
1999 cmd_ex.max_send_wr = cmd.max_send_wr;
2000 cmd_ex.max_recv_wr = cmd.max_recv_wr;
2001 cmd_ex.max_send_sge = cmd.max_send_sge;
2002 cmd_ex.max_recv_sge = cmd.max_recv_sge;
2003 cmd_ex.max_inline_data = cmd.max_inline_data;
2004 cmd_ex.sq_sig_all = cmd.sq_sig_all;
2005 cmd_ex.qp_type = cmd.qp_type;
2006 cmd_ex.is_srq = cmd.is_srq;
2007
2008 err = create_qp(file, &ucore, &uhw, &cmd_ex,
2009 offsetof(typeof(cmd_ex), is_srq) +
2010 sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
2011 NULL);
2012
2013 if (err)
2014 return err;
2015
2016 return in_len;
2017 }
2018
2019 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
2020 struct ib_uverbs_ex_create_qp_resp *resp,
2021 struct ib_udata *ucore)
2022 {
2023 if (ib_copy_to_udata(ucore, resp, resp->response_length))
2024 return -EFAULT;
2025
2026 return 0;
2027 }
2028
2029 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
2030 struct ib_device *ib_dev,
2031 struct ib_udata *ucore,
2032 struct ib_udata *uhw)
2033 {
2034 struct ib_uverbs_ex_create_qp_resp resp;
2035 struct ib_uverbs_ex_create_qp cmd = {0};
2036 int err;
2037
2038 if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
2039 sizeof(cmd.comp_mask)))
2040 return -EINVAL;
2041
2042 err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2043 if (err)
2044 return err;
2045
2046 if (cmd.comp_mask)
2047 return -EINVAL;
2048
2049 if (cmd.reserved)
2050 return -EINVAL;
2051
2052 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
2053 sizeof(resp.response_length)))
2054 return -ENOSPC;
2055
2056 err = create_qp(file, ucore, uhw, &cmd,
2057 min(ucore->inlen, sizeof(cmd)),
2058 ib_uverbs_ex_create_qp_cb, NULL);
2059
2060 if (err)
2061 return err;
2062
2063 return 0;
2064 }
2065
2066 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
2067 struct ib_device *ib_dev,
2068 const char __user *buf, int in_len, int out_len)
2069 {
2070 struct ib_uverbs_open_qp cmd;
2071 struct ib_uverbs_create_qp_resp resp;
2072 struct ib_udata udata;
2073 struct ib_uqp_object *obj;
2074 struct ib_xrcd *xrcd;
2075 struct ib_uobject *uninitialized_var(xrcd_uobj);
2076 struct ib_qp *qp;
2077 struct ib_qp_open_attr attr;
2078 int ret;
2079
2080 if (out_len < sizeof resp)
2081 return -ENOSPC;
2082
2083 if (copy_from_user(&cmd, buf, sizeof cmd))
2084 return -EFAULT;
2085
2086 INIT_UDATA(&udata, buf + sizeof cmd,
2087 (unsigned long) cmd.response + sizeof resp,
2088 in_len - sizeof cmd, out_len - sizeof resp);
2089
2090 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2091 if (!obj)
2092 return -ENOMEM;
2093
2094 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
2095 down_write(&obj->uevent.uobject.mutex);
2096
2097 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
2098 if (!xrcd) {
2099 ret = -EINVAL;
2100 goto err_put;
2101 }
2102
2103 attr.event_handler = ib_uverbs_qp_event_handler;
2104 attr.qp_context = file;
2105 attr.qp_num = cmd.qpn;
2106 attr.qp_type = cmd.qp_type;
2107
2108 obj->uevent.events_reported = 0;
2109 INIT_LIST_HEAD(&obj->uevent.event_list);
2110 INIT_LIST_HEAD(&obj->mcast_list);
2111
2112 qp = ib_open_qp(xrcd, &attr);
2113 if (IS_ERR(qp)) {
2114 ret = PTR_ERR(qp);
2115 goto err_put;
2116 }
2117
2118 qp->uobject = &obj->uevent.uobject;
2119
2120 obj->uevent.uobject.object = qp;
2121 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
2122 if (ret)
2123 goto err_destroy;
2124
2125 memset(&resp, 0, sizeof resp);
2126 resp.qpn = qp->qp_num;
2127 resp.qp_handle = obj->uevent.uobject.id;
2128
2129 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2130 &resp, sizeof resp)) {
2131 ret = -EFAULT;
2132 goto err_remove;
2133 }
2134
2135 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2136 atomic_inc(&obj->uxrcd->refcnt);
2137 put_xrcd_read(xrcd_uobj);
2138
2139 mutex_lock(&file->mutex);
2140 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
2141 mutex_unlock(&file->mutex);
2142
2143 obj->uevent.uobject.live = 1;
2144
2145 up_write(&obj->uevent.uobject.mutex);
2146
2147 return in_len;
2148
2149 err_remove:
2150 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
2151
2152 err_destroy:
2153 ib_destroy_qp(qp);
2154
2155 err_put:
2156 put_xrcd_read(xrcd_uobj);
2157 put_uobj_write(&obj->uevent.uobject);
2158 return ret;
2159 }
2160
2161 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
2162 struct ib_device *ib_dev,
2163 const char __user *buf, int in_len,
2164 int out_len)
2165 {
2166 struct ib_uverbs_query_qp cmd;
2167 struct ib_uverbs_query_qp_resp resp;
2168 struct ib_qp *qp;
2169 struct ib_qp_attr *attr;
2170 struct ib_qp_init_attr *init_attr;
2171 int ret;
2172
2173 if (copy_from_user(&cmd, buf, sizeof cmd))
2174 return -EFAULT;
2175
2176 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2177 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
2178 if (!attr || !init_attr) {
2179 ret = -ENOMEM;
2180 goto out;
2181 }
2182
2183 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2184 if (!qp) {
2185 ret = -EINVAL;
2186 goto out;
2187 }
2188
2189 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
2190
2191 put_qp_read(qp);
2192
2193 if (ret)
2194 goto out;
2195
2196 memset(&resp, 0, sizeof resp);
2197
2198 resp.qp_state = attr->qp_state;
2199 resp.cur_qp_state = attr->cur_qp_state;
2200 resp.path_mtu = attr->path_mtu;
2201 resp.path_mig_state = attr->path_mig_state;
2202 resp.qkey = attr->qkey;
2203 resp.rq_psn = attr->rq_psn;
2204 resp.sq_psn = attr->sq_psn;
2205 resp.dest_qp_num = attr->dest_qp_num;
2206 resp.qp_access_flags = attr->qp_access_flags;
2207 resp.pkey_index = attr->pkey_index;
2208 resp.alt_pkey_index = attr->alt_pkey_index;
2209 resp.sq_draining = attr->sq_draining;
2210 resp.max_rd_atomic = attr->max_rd_atomic;
2211 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
2212 resp.min_rnr_timer = attr->min_rnr_timer;
2213 resp.port_num = attr->port_num;
2214 resp.timeout = attr->timeout;
2215 resp.retry_cnt = attr->retry_cnt;
2216 resp.rnr_retry = attr->rnr_retry;
2217 resp.alt_port_num = attr->alt_port_num;
2218 resp.alt_timeout = attr->alt_timeout;
2219
2220 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
2221 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
2222 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
2223 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
2224 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
2225 resp.dest.dlid = attr->ah_attr.dlid;
2226 resp.dest.sl = attr->ah_attr.sl;
2227 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
2228 resp.dest.static_rate = attr->ah_attr.static_rate;
2229 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
2230 resp.dest.port_num = attr->ah_attr.port_num;
2231
2232 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
2233 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
2234 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
2235 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
2236 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
2237 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
2238 resp.alt_dest.sl = attr->alt_ah_attr.sl;
2239 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
2240 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
2241 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
2242 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
2243
2244 resp.max_send_wr = init_attr->cap.max_send_wr;
2245 resp.max_recv_wr = init_attr->cap.max_recv_wr;
2246 resp.max_send_sge = init_attr->cap.max_send_sge;
2247 resp.max_recv_sge = init_attr->cap.max_recv_sge;
2248 resp.max_inline_data = init_attr->cap.max_inline_data;
2249 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
2250
2251 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2252 &resp, sizeof resp))
2253 ret = -EFAULT;
2254
2255 out:
2256 kfree(attr);
2257 kfree(init_attr);
2258
2259 return ret ? ret : in_len;
2260 }
2261
2262 /* Remove ignored fields set in the attribute mask */
2263 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
2264 {
2265 switch (qp_type) {
2266 case IB_QPT_XRC_INI:
2267 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
2268 case IB_QPT_XRC_TGT:
2269 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
2270 IB_QP_RNR_RETRY);
2271 default:
2272 return mask;
2273 }
2274 }
2275
2276 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2277 struct ib_device *ib_dev,
2278 const char __user *buf, int in_len,
2279 int out_len)
2280 {
2281 struct ib_uverbs_modify_qp cmd;
2282 struct ib_udata udata;
2283 struct ib_qp *qp;
2284 struct ib_qp_attr *attr;
2285 int ret;
2286
2287 if (copy_from_user(&cmd, buf, sizeof cmd))
2288 return -EFAULT;
2289
2290 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2291 out_len);
2292
2293 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2294 if (!attr)
2295 return -ENOMEM;
2296
2297 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2298 if (!qp) {
2299 ret = -EINVAL;
2300 goto out;
2301 }
2302
2303 attr->qp_state = cmd.qp_state;
2304 attr->cur_qp_state = cmd.cur_qp_state;
2305 attr->path_mtu = cmd.path_mtu;
2306 attr->path_mig_state = cmd.path_mig_state;
2307 attr->qkey = cmd.qkey;
2308 attr->rq_psn = cmd.rq_psn;
2309 attr->sq_psn = cmd.sq_psn;
2310 attr->dest_qp_num = cmd.dest_qp_num;
2311 attr->qp_access_flags = cmd.qp_access_flags;
2312 attr->pkey_index = cmd.pkey_index;
2313 attr->alt_pkey_index = cmd.alt_pkey_index;
2314 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
2315 attr->max_rd_atomic = cmd.max_rd_atomic;
2316 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
2317 attr->min_rnr_timer = cmd.min_rnr_timer;
2318 attr->port_num = cmd.port_num;
2319 attr->timeout = cmd.timeout;
2320 attr->retry_cnt = cmd.retry_cnt;
2321 attr->rnr_retry = cmd.rnr_retry;
2322 attr->alt_port_num = cmd.alt_port_num;
2323 attr->alt_timeout = cmd.alt_timeout;
2324
2325 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
2326 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
2327 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
2328 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
2329 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
2330 attr->ah_attr.dlid = cmd.dest.dlid;
2331 attr->ah_attr.sl = cmd.dest.sl;
2332 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
2333 attr->ah_attr.static_rate = cmd.dest.static_rate;
2334 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
2335 attr->ah_attr.port_num = cmd.dest.port_num;
2336
2337 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
2338 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
2339 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
2340 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
2341 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
2342 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
2343 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
2344 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
2345 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
2346 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
2347 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
2348
2349 if (qp->real_qp == qp) {
2350 ret = ib_resolve_eth_dmac(qp, attr, &cmd.attr_mask);
2351 if (ret)
2352 goto release_qp;
2353 ret = qp->device->modify_qp(qp, attr,
2354 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
2355 } else {
2356 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
2357 }
2358
2359 if (ret)
2360 goto release_qp;
2361
2362 ret = in_len;
2363
2364 release_qp:
2365 put_qp_read(qp);
2366
2367 out:
2368 kfree(attr);
2369
2370 return ret;
2371 }
2372
2373 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2374 struct ib_device *ib_dev,
2375 const char __user *buf, int in_len,
2376 int out_len)
2377 {
2378 struct ib_uverbs_destroy_qp cmd;
2379 struct ib_uverbs_destroy_qp_resp resp;
2380 struct ib_uobject *uobj;
2381 struct ib_qp *qp;
2382 struct ib_uqp_object *obj;
2383 int ret = -EINVAL;
2384
2385 if (copy_from_user(&cmd, buf, sizeof cmd))
2386 return -EFAULT;
2387
2388 memset(&resp, 0, sizeof resp);
2389
2390 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2391 if (!uobj)
2392 return -EINVAL;
2393 qp = uobj->object;
2394 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2395
2396 if (!list_empty(&obj->mcast_list)) {
2397 put_uobj_write(uobj);
2398 return -EBUSY;
2399 }
2400
2401 ret = ib_destroy_qp(qp);
2402 if (!ret)
2403 uobj->live = 0;
2404
2405 put_uobj_write(uobj);
2406
2407 if (ret)
2408 return ret;
2409
2410 if (obj->uxrcd)
2411 atomic_dec(&obj->uxrcd->refcnt);
2412
2413 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2414
2415 mutex_lock(&file->mutex);
2416 list_del(&uobj->list);
2417 mutex_unlock(&file->mutex);
2418
2419 ib_uverbs_release_uevent(file, &obj->uevent);
2420
2421 resp.events_reported = obj->uevent.events_reported;
2422
2423 put_uobj(uobj);
2424
2425 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2426 &resp, sizeof resp))
2427 return -EFAULT;
2428
2429 return in_len;
2430 }
2431
2432 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2433 {
2434 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2435 num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2436 };
2437
2438 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2439 struct ib_device *ib_dev,
2440 const char __user *buf, int in_len,
2441 int out_len)
2442 {
2443 struct ib_uverbs_post_send cmd;
2444 struct ib_uverbs_post_send_resp resp;
2445 struct ib_uverbs_send_wr *user_wr;
2446 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
2447 struct ib_qp *qp;
2448 int i, sg_ind;
2449 int is_ud;
2450 ssize_t ret = -EINVAL;
2451 size_t next_size;
2452
2453 if (copy_from_user(&cmd, buf, sizeof cmd))
2454 return -EFAULT;
2455
2456 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2457 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2458 return -EINVAL;
2459
2460 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2461 return -EINVAL;
2462
2463 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2464 if (!user_wr)
2465 return -ENOMEM;
2466
2467 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2468 if (!qp)
2469 goto out;
2470
2471 is_ud = qp->qp_type == IB_QPT_UD;
2472 sg_ind = 0;
2473 last = NULL;
2474 for (i = 0; i < cmd.wr_count; ++i) {
2475 if (copy_from_user(user_wr,
2476 buf + sizeof cmd + i * cmd.wqe_size,
2477 cmd.wqe_size)) {
2478 ret = -EFAULT;
2479 goto out_put;
2480 }
2481
2482 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2483 ret = -EINVAL;
2484 goto out_put;
2485 }
2486
2487 if (is_ud) {
2488 struct ib_ud_wr *ud;
2489
2490 if (user_wr->opcode != IB_WR_SEND &&
2491 user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2492 ret = -EINVAL;
2493 goto out_put;
2494 }
2495
2496 next_size = sizeof(*ud);
2497 ud = alloc_wr(next_size, user_wr->num_sge);
2498 if (!ud) {
2499 ret = -ENOMEM;
2500 goto out_put;
2501 }
2502
2503 ud->ah = idr_read_ah(user_wr->wr.ud.ah, file->ucontext);
2504 if (!ud->ah) {
2505 kfree(ud);
2506 ret = -EINVAL;
2507 goto out_put;
2508 }
2509 ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2510 ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2511
2512 next = &ud->wr;
2513 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2514 user_wr->opcode == IB_WR_RDMA_WRITE ||
2515 user_wr->opcode == IB_WR_RDMA_READ) {
2516 struct ib_rdma_wr *rdma;
2517
2518 next_size = sizeof(*rdma);
2519 rdma = alloc_wr(next_size, user_wr->num_sge);
2520 if (!rdma) {
2521 ret = -ENOMEM;
2522 goto out_put;
2523 }
2524
2525 rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2526 rdma->rkey = user_wr->wr.rdma.rkey;
2527
2528 next = &rdma->wr;
2529 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2530 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2531 struct ib_atomic_wr *atomic;
2532
2533 next_size = sizeof(*atomic);
2534 atomic = alloc_wr(next_size, user_wr->num_sge);
2535 if (!atomic) {
2536 ret = -ENOMEM;
2537 goto out_put;
2538 }
2539
2540 atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2541 atomic->compare_add = user_wr->wr.atomic.compare_add;
2542 atomic->swap = user_wr->wr.atomic.swap;
2543 atomic->rkey = user_wr->wr.atomic.rkey;
2544
2545 next = &atomic->wr;
2546 } else if (user_wr->opcode == IB_WR_SEND ||
2547 user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2548 user_wr->opcode == IB_WR_SEND_WITH_INV) {
2549 next_size = sizeof(*next);
2550 next = alloc_wr(next_size, user_wr->num_sge);
2551 if (!next) {
2552 ret = -ENOMEM;
2553 goto out_put;
2554 }
2555 } else {
2556 ret = -EINVAL;
2557 goto out_put;
2558 }
2559
2560 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2561 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2562 next->ex.imm_data =
2563 (__be32 __force) user_wr->ex.imm_data;
2564 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2565 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2566 }
2567
2568 if (!last)
2569 wr = next;
2570 else
2571 last->next = next;
2572 last = next;
2573
2574 next->next = NULL;
2575 next->wr_id = user_wr->wr_id;
2576 next->num_sge = user_wr->num_sge;
2577 next->opcode = user_wr->opcode;
2578 next->send_flags = user_wr->send_flags;
2579
2580 if (next->num_sge) {
2581 next->sg_list = (void *) next +
2582 ALIGN(next_size, sizeof(struct ib_sge));
2583 if (copy_from_user(next->sg_list,
2584 buf + sizeof cmd +
2585 cmd.wr_count * cmd.wqe_size +
2586 sg_ind * sizeof (struct ib_sge),
2587 next->num_sge * sizeof (struct ib_sge))) {
2588 ret = -EFAULT;
2589 goto out_put;
2590 }
2591 sg_ind += next->num_sge;
2592 } else
2593 next->sg_list = NULL;
2594 }
2595
2596 resp.bad_wr = 0;
2597 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2598 if (ret)
2599 for (next = wr; next; next = next->next) {
2600 ++resp.bad_wr;
2601 if (next == bad_wr)
2602 break;
2603 }
2604
2605 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2606 &resp, sizeof resp))
2607 ret = -EFAULT;
2608
2609 out_put:
2610 put_qp_read(qp);
2611
2612 while (wr) {
2613 if (is_ud && ud_wr(wr)->ah)
2614 put_ah_read(ud_wr(wr)->ah);
2615 next = wr->next;
2616 kfree(wr);
2617 wr = next;
2618 }
2619
2620 out:
2621 kfree(user_wr);
2622
2623 return ret ? ret : in_len;
2624 }
2625
2626 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2627 int in_len,
2628 u32 wr_count,
2629 u32 sge_count,
2630 u32 wqe_size)
2631 {
2632 struct ib_uverbs_recv_wr *user_wr;
2633 struct ib_recv_wr *wr = NULL, *last, *next;
2634 int sg_ind;
2635 int i;
2636 int ret;
2637
2638 if (in_len < wqe_size * wr_count +
2639 sge_count * sizeof (struct ib_uverbs_sge))
2640 return ERR_PTR(-EINVAL);
2641
2642 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2643 return ERR_PTR(-EINVAL);
2644
2645 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2646 if (!user_wr)
2647 return ERR_PTR(-ENOMEM);
2648
2649 sg_ind = 0;
2650 last = NULL;
2651 for (i = 0; i < wr_count; ++i) {
2652 if (copy_from_user(user_wr, buf + i * wqe_size,
2653 wqe_size)) {
2654 ret = -EFAULT;
2655 goto err;
2656 }
2657
2658 if (user_wr->num_sge + sg_ind > sge_count) {
2659 ret = -EINVAL;
2660 goto err;
2661 }
2662
2663 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2664 user_wr->num_sge * sizeof (struct ib_sge),
2665 GFP_KERNEL);
2666 if (!next) {
2667 ret = -ENOMEM;
2668 goto err;
2669 }
2670
2671 if (!last)
2672 wr = next;
2673 else
2674 last->next = next;
2675 last = next;
2676
2677 next->next = NULL;
2678 next->wr_id = user_wr->wr_id;
2679 next->num_sge = user_wr->num_sge;
2680
2681 if (next->num_sge) {
2682 next->sg_list = (void *) next +
2683 ALIGN(sizeof *next, sizeof (struct ib_sge));
2684 if (copy_from_user(next->sg_list,
2685 buf + wr_count * wqe_size +
2686 sg_ind * sizeof (struct ib_sge),
2687 next->num_sge * sizeof (struct ib_sge))) {
2688 ret = -EFAULT;
2689 goto err;
2690 }
2691 sg_ind += next->num_sge;
2692 } else
2693 next->sg_list = NULL;
2694 }
2695
2696 kfree(user_wr);
2697 return wr;
2698
2699 err:
2700 kfree(user_wr);
2701
2702 while (wr) {
2703 next = wr->next;
2704 kfree(wr);
2705 wr = next;
2706 }
2707
2708 return ERR_PTR(ret);
2709 }
2710
2711 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2712 struct ib_device *ib_dev,
2713 const char __user *buf, int in_len,
2714 int out_len)
2715 {
2716 struct ib_uverbs_post_recv cmd;
2717 struct ib_uverbs_post_recv_resp resp;
2718 struct ib_recv_wr *wr, *next, *bad_wr;
2719 struct ib_qp *qp;
2720 ssize_t ret = -EINVAL;
2721
2722 if (copy_from_user(&cmd, buf, sizeof cmd))
2723 return -EFAULT;
2724
2725 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2726 in_len - sizeof cmd, cmd.wr_count,
2727 cmd.sge_count, cmd.wqe_size);
2728 if (IS_ERR(wr))
2729 return PTR_ERR(wr);
2730
2731 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2732 if (!qp)
2733 goto out;
2734
2735 resp.bad_wr = 0;
2736 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2737
2738 put_qp_read(qp);
2739
2740 if (ret)
2741 for (next = wr; next; next = next->next) {
2742 ++resp.bad_wr;
2743 if (next == bad_wr)
2744 break;
2745 }
2746
2747 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2748 &resp, sizeof resp))
2749 ret = -EFAULT;
2750
2751 out:
2752 while (wr) {
2753 next = wr->next;
2754 kfree(wr);
2755 wr = next;
2756 }
2757
2758 return ret ? ret : in_len;
2759 }
2760
2761 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2762 struct ib_device *ib_dev,
2763 const char __user *buf, int in_len,
2764 int out_len)
2765 {
2766 struct ib_uverbs_post_srq_recv cmd;
2767 struct ib_uverbs_post_srq_recv_resp resp;
2768 struct ib_recv_wr *wr, *next, *bad_wr;
2769 struct ib_srq *srq;
2770 ssize_t ret = -EINVAL;
2771
2772 if (copy_from_user(&cmd, buf, sizeof cmd))
2773 return -EFAULT;
2774
2775 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2776 in_len - sizeof cmd, cmd.wr_count,
2777 cmd.sge_count, cmd.wqe_size);
2778 if (IS_ERR(wr))
2779 return PTR_ERR(wr);
2780
2781 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2782 if (!srq)
2783 goto out;
2784
2785 resp.bad_wr = 0;
2786 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2787
2788 put_srq_read(srq);
2789
2790 if (ret)
2791 for (next = wr; next; next = next->next) {
2792 ++resp.bad_wr;
2793 if (next == bad_wr)
2794 break;
2795 }
2796
2797 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2798 &resp, sizeof resp))
2799 ret = -EFAULT;
2800
2801 out:
2802 while (wr) {
2803 next = wr->next;
2804 kfree(wr);
2805 wr = next;
2806 }
2807
2808 return ret ? ret : in_len;
2809 }
2810
2811 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2812 struct ib_device *ib_dev,
2813 const char __user *buf, int in_len,
2814 int out_len)
2815 {
2816 struct ib_uverbs_create_ah cmd;
2817 struct ib_uverbs_create_ah_resp resp;
2818 struct ib_uobject *uobj;
2819 struct ib_pd *pd;
2820 struct ib_ah *ah;
2821 struct ib_ah_attr attr;
2822 int ret;
2823
2824 if (out_len < sizeof resp)
2825 return -ENOSPC;
2826
2827 if (copy_from_user(&cmd, buf, sizeof cmd))
2828 return -EFAULT;
2829
2830 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2831 if (!uobj)
2832 return -ENOMEM;
2833
2834 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2835 down_write(&uobj->mutex);
2836
2837 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2838 if (!pd) {
2839 ret = -EINVAL;
2840 goto err;
2841 }
2842
2843 attr.dlid = cmd.attr.dlid;
2844 attr.sl = cmd.attr.sl;
2845 attr.src_path_bits = cmd.attr.src_path_bits;
2846 attr.static_rate = cmd.attr.static_rate;
2847 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2848 attr.port_num = cmd.attr.port_num;
2849 attr.grh.flow_label = cmd.attr.grh.flow_label;
2850 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2851 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2852 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2853 memset(&attr.dmac, 0, sizeof(attr.dmac));
2854 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2855
2856 ah = ib_create_ah(pd, &attr);
2857 if (IS_ERR(ah)) {
2858 ret = PTR_ERR(ah);
2859 goto err_put;
2860 }
2861
2862 ah->uobject = uobj;
2863 uobj->object = ah;
2864
2865 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2866 if (ret)
2867 goto err_destroy;
2868
2869 resp.ah_handle = uobj->id;
2870
2871 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2872 &resp, sizeof resp)) {
2873 ret = -EFAULT;
2874 goto err_copy;
2875 }
2876
2877 put_pd_read(pd);
2878
2879 mutex_lock(&file->mutex);
2880 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2881 mutex_unlock(&file->mutex);
2882
2883 uobj->live = 1;
2884
2885 up_write(&uobj->mutex);
2886
2887 return in_len;
2888
2889 err_copy:
2890 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2891
2892 err_destroy:
2893 ib_destroy_ah(ah);
2894
2895 err_put:
2896 put_pd_read(pd);
2897
2898 err:
2899 put_uobj_write(uobj);
2900 return ret;
2901 }
2902
2903 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2904 struct ib_device *ib_dev,
2905 const char __user *buf, int in_len, int out_len)
2906 {
2907 struct ib_uverbs_destroy_ah cmd;
2908 struct ib_ah *ah;
2909 struct ib_uobject *uobj;
2910 int ret;
2911
2912 if (copy_from_user(&cmd, buf, sizeof cmd))
2913 return -EFAULT;
2914
2915 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2916 if (!uobj)
2917 return -EINVAL;
2918 ah = uobj->object;
2919
2920 ret = ib_destroy_ah(ah);
2921 if (!ret)
2922 uobj->live = 0;
2923
2924 put_uobj_write(uobj);
2925
2926 if (ret)
2927 return ret;
2928
2929 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2930
2931 mutex_lock(&file->mutex);
2932 list_del(&uobj->list);
2933 mutex_unlock(&file->mutex);
2934
2935 put_uobj(uobj);
2936
2937 return in_len;
2938 }
2939
2940 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2941 struct ib_device *ib_dev,
2942 const char __user *buf, int in_len,
2943 int out_len)
2944 {
2945 struct ib_uverbs_attach_mcast cmd;
2946 struct ib_qp *qp;
2947 struct ib_uqp_object *obj;
2948 struct ib_uverbs_mcast_entry *mcast;
2949 int ret;
2950
2951 if (copy_from_user(&cmd, buf, sizeof cmd))
2952 return -EFAULT;
2953
2954 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2955 if (!qp)
2956 return -EINVAL;
2957
2958 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2959
2960 list_for_each_entry(mcast, &obj->mcast_list, list)
2961 if (cmd.mlid == mcast->lid &&
2962 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2963 ret = 0;
2964 goto out_put;
2965 }
2966
2967 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2968 if (!mcast) {
2969 ret = -ENOMEM;
2970 goto out_put;
2971 }
2972
2973 mcast->lid = cmd.mlid;
2974 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2975
2976 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2977 if (!ret)
2978 list_add_tail(&mcast->list, &obj->mcast_list);
2979 else
2980 kfree(mcast);
2981
2982 out_put:
2983 put_qp_write(qp);
2984
2985 return ret ? ret : in_len;
2986 }
2987
2988 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2989 struct ib_device *ib_dev,
2990 const char __user *buf, int in_len,
2991 int out_len)
2992 {
2993 struct ib_uverbs_detach_mcast cmd;
2994 struct ib_uqp_object *obj;
2995 struct ib_qp *qp;
2996 struct ib_uverbs_mcast_entry *mcast;
2997 int ret = -EINVAL;
2998
2999 if (copy_from_user(&cmd, buf, sizeof cmd))
3000 return -EFAULT;
3001
3002 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
3003 if (!qp)
3004 return -EINVAL;
3005
3006 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
3007 if (ret)
3008 goto out_put;
3009
3010 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
3011
3012 list_for_each_entry(mcast, &obj->mcast_list, list)
3013 if (cmd.mlid == mcast->lid &&
3014 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
3015 list_del(&mcast->list);
3016 kfree(mcast);
3017 break;
3018 }
3019
3020 out_put:
3021 put_qp_write(qp);
3022
3023 return ret ? ret : in_len;
3024 }
3025
3026 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
3027 union ib_flow_spec *ib_spec)
3028 {
3029 if (kern_spec->reserved)
3030 return -EINVAL;
3031
3032 ib_spec->type = kern_spec->type;
3033
3034 switch (ib_spec->type) {
3035 case IB_FLOW_SPEC_ETH:
3036 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
3037 if (ib_spec->eth.size != kern_spec->eth.size)
3038 return -EINVAL;
3039 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
3040 sizeof(struct ib_flow_eth_filter));
3041 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
3042 sizeof(struct ib_flow_eth_filter));
3043 break;
3044 case IB_FLOW_SPEC_IPV4:
3045 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
3046 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
3047 return -EINVAL;
3048 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
3049 sizeof(struct ib_flow_ipv4_filter));
3050 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
3051 sizeof(struct ib_flow_ipv4_filter));
3052 break;
3053 case IB_FLOW_SPEC_TCP:
3054 case IB_FLOW_SPEC_UDP:
3055 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
3056 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
3057 return -EINVAL;
3058 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
3059 sizeof(struct ib_flow_tcp_udp_filter));
3060 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
3061 sizeof(struct ib_flow_tcp_udp_filter));
3062 break;
3063 default:
3064 return -EINVAL;
3065 }
3066 return 0;
3067 }
3068
3069 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3070 struct ib_device *ib_dev,
3071 struct ib_udata *ucore,
3072 struct ib_udata *uhw)
3073 {
3074 struct ib_uverbs_create_flow cmd;
3075 struct ib_uverbs_create_flow_resp resp;
3076 struct ib_uobject *uobj;
3077 struct ib_flow *flow_id;
3078 struct ib_uverbs_flow_attr *kern_flow_attr;
3079 struct ib_flow_attr *flow_attr;
3080 struct ib_qp *qp;
3081 int err = 0;
3082 void *kern_spec;
3083 void *ib_spec;
3084 int i;
3085
3086 if (ucore->inlen < sizeof(cmd))
3087 return -EINVAL;
3088
3089 if (ucore->outlen < sizeof(resp))
3090 return -ENOSPC;
3091
3092 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3093 if (err)
3094 return err;
3095
3096 ucore->inbuf += sizeof(cmd);
3097 ucore->inlen -= sizeof(cmd);
3098
3099 if (cmd.comp_mask)
3100 return -EINVAL;
3101
3102 if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
3103 !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
3104 return -EPERM;
3105
3106 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3107 return -EINVAL;
3108
3109 if (cmd.flow_attr.size > ucore->inlen ||
3110 cmd.flow_attr.size >
3111 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3112 return -EINVAL;
3113
3114 if (cmd.flow_attr.reserved[0] ||
3115 cmd.flow_attr.reserved[1])
3116 return -EINVAL;
3117
3118 if (cmd.flow_attr.num_of_specs) {
3119 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3120 GFP_KERNEL);
3121 if (!kern_flow_attr)
3122 return -ENOMEM;
3123
3124 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3125 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3126 cmd.flow_attr.size);
3127 if (err)
3128 goto err_free_attr;
3129 } else {
3130 kern_flow_attr = &cmd.flow_attr;
3131 }
3132
3133 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
3134 if (!uobj) {
3135 err = -ENOMEM;
3136 goto err_free_attr;
3137 }
3138 init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
3139 down_write(&uobj->mutex);
3140
3141 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
3142 if (!qp) {
3143 err = -EINVAL;
3144 goto err_uobj;
3145 }
3146
3147 flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL);
3148 if (!flow_attr) {
3149 err = -ENOMEM;
3150 goto err_put;
3151 }
3152
3153 flow_attr->type = kern_flow_attr->type;
3154 flow_attr->priority = kern_flow_attr->priority;
3155 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3156 flow_attr->port = kern_flow_attr->port;
3157 flow_attr->flags = kern_flow_attr->flags;
3158 flow_attr->size = sizeof(*flow_attr);
3159
3160 kern_spec = kern_flow_attr + 1;
3161 ib_spec = flow_attr + 1;
3162 for (i = 0; i < flow_attr->num_of_specs &&
3163 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3164 cmd.flow_attr.size >=
3165 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3166 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3167 if (err)
3168 goto err_free;
3169 flow_attr->size +=
3170 ((union ib_flow_spec *) ib_spec)->size;
3171 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3172 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3173 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3174 }
3175 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3176 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3177 i, cmd.flow_attr.size);
3178 err = -EINVAL;
3179 goto err_free;
3180 }
3181 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3182 if (IS_ERR(flow_id)) {
3183 err = PTR_ERR(flow_id);
3184 goto err_free;
3185 }
3186 flow_id->qp = qp;
3187 flow_id->uobject = uobj;
3188 uobj->object = flow_id;
3189
3190 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
3191 if (err)
3192 goto destroy_flow;
3193
3194 memset(&resp, 0, sizeof(resp));
3195 resp.flow_handle = uobj->id;
3196
3197 err = ib_copy_to_udata(ucore,
3198 &resp, sizeof(resp));
3199 if (err)
3200 goto err_copy;
3201
3202 put_qp_read(qp);
3203 mutex_lock(&file->mutex);
3204 list_add_tail(&uobj->list, &file->ucontext->rule_list);
3205 mutex_unlock(&file->mutex);
3206
3207 uobj->live = 1;
3208
3209 up_write(&uobj->mutex);
3210 kfree(flow_attr);
3211 if (cmd.flow_attr.num_of_specs)
3212 kfree(kern_flow_attr);
3213 return 0;
3214 err_copy:
3215 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3216 destroy_flow:
3217 ib_destroy_flow(flow_id);
3218 err_free:
3219 kfree(flow_attr);
3220 err_put:
3221 put_qp_read(qp);
3222 err_uobj:
3223 put_uobj_write(uobj);
3224 err_free_attr:
3225 if (cmd.flow_attr.num_of_specs)
3226 kfree(kern_flow_attr);
3227 return err;
3228 }
3229
3230 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3231 struct ib_device *ib_dev,
3232 struct ib_udata *ucore,
3233 struct ib_udata *uhw)
3234 {
3235 struct ib_uverbs_destroy_flow cmd;
3236 struct ib_flow *flow_id;
3237 struct ib_uobject *uobj;
3238 int ret;
3239
3240 if (ucore->inlen < sizeof(cmd))
3241 return -EINVAL;
3242
3243 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3244 if (ret)
3245 return ret;
3246
3247 if (cmd.comp_mask)
3248 return -EINVAL;
3249
3250 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
3251 file->ucontext);
3252 if (!uobj)
3253 return -EINVAL;
3254 flow_id = uobj->object;
3255
3256 ret = ib_destroy_flow(flow_id);
3257 if (!ret)
3258 uobj->live = 0;
3259
3260 put_uobj_write(uobj);
3261
3262 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3263
3264 mutex_lock(&file->mutex);
3265 list_del(&uobj->list);
3266 mutex_unlock(&file->mutex);
3267
3268 put_uobj(uobj);
3269
3270 return ret;
3271 }
3272
3273 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3274 struct ib_device *ib_dev,
3275 struct ib_uverbs_create_xsrq *cmd,
3276 struct ib_udata *udata)
3277 {
3278 struct ib_uverbs_create_srq_resp resp;
3279 struct ib_usrq_object *obj;
3280 struct ib_pd *pd;
3281 struct ib_srq *srq;
3282 struct ib_uobject *uninitialized_var(xrcd_uobj);
3283 struct ib_srq_init_attr attr;
3284 int ret;
3285
3286 obj = kmalloc(sizeof *obj, GFP_KERNEL);
3287 if (!obj)
3288 return -ENOMEM;
3289
3290 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
3291 down_write(&obj->uevent.uobject.mutex);
3292
3293 if (cmd->srq_type == IB_SRQT_XRC) {
3294 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
3295 if (!attr.ext.xrc.xrcd) {
3296 ret = -EINVAL;
3297 goto err;
3298 }
3299
3300 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3301 atomic_inc(&obj->uxrcd->refcnt);
3302
3303 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
3304 if (!attr.ext.xrc.cq) {
3305 ret = -EINVAL;
3306 goto err_put_xrcd;
3307 }
3308 }
3309
3310 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
3311 if (!pd) {
3312 ret = -EINVAL;
3313 goto err_put_cq;
3314 }
3315
3316 attr.event_handler = ib_uverbs_srq_event_handler;
3317 attr.srq_context = file;
3318 attr.srq_type = cmd->srq_type;
3319 attr.attr.max_wr = cmd->max_wr;
3320 attr.attr.max_sge = cmd->max_sge;
3321 attr.attr.srq_limit = cmd->srq_limit;
3322
3323 obj->uevent.events_reported = 0;
3324 INIT_LIST_HEAD(&obj->uevent.event_list);
3325
3326 srq = pd->device->create_srq(pd, &attr, udata);
3327 if (IS_ERR(srq)) {
3328 ret = PTR_ERR(srq);
3329 goto err_put;
3330 }
3331
3332 srq->device = pd->device;
3333 srq->pd = pd;
3334 srq->srq_type = cmd->srq_type;
3335 srq->uobject = &obj->uevent.uobject;
3336 srq->event_handler = attr.event_handler;
3337 srq->srq_context = attr.srq_context;
3338
3339 if (cmd->srq_type == IB_SRQT_XRC) {
3340 srq->ext.xrc.cq = attr.ext.xrc.cq;
3341 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3342 atomic_inc(&attr.ext.xrc.cq->usecnt);
3343 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3344 }
3345
3346 atomic_inc(&pd->usecnt);
3347 atomic_set(&srq->usecnt, 0);
3348
3349 obj->uevent.uobject.object = srq;
3350 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3351 if (ret)
3352 goto err_destroy;
3353
3354 memset(&resp, 0, sizeof resp);
3355 resp.srq_handle = obj->uevent.uobject.id;
3356 resp.max_wr = attr.attr.max_wr;
3357 resp.max_sge = attr.attr.max_sge;
3358 if (cmd->srq_type == IB_SRQT_XRC)
3359 resp.srqn = srq->ext.xrc.srq_num;
3360
3361 if (copy_to_user((void __user *) (unsigned long) cmd->response,
3362 &resp, sizeof resp)) {
3363 ret = -EFAULT;
3364 goto err_copy;
3365 }
3366
3367 if (cmd->srq_type == IB_SRQT_XRC) {
3368 put_uobj_read(xrcd_uobj);
3369 put_cq_read(attr.ext.xrc.cq);
3370 }
3371 put_pd_read(pd);
3372
3373 mutex_lock(&file->mutex);
3374 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
3375 mutex_unlock(&file->mutex);
3376
3377 obj->uevent.uobject.live = 1;
3378
3379 up_write(&obj->uevent.uobject.mutex);
3380
3381 return 0;
3382
3383 err_copy:
3384 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3385
3386 err_destroy:
3387 ib_destroy_srq(srq);
3388
3389 err_put:
3390 put_pd_read(pd);
3391
3392 err_put_cq:
3393 if (cmd->srq_type == IB_SRQT_XRC)
3394 put_cq_read(attr.ext.xrc.cq);
3395
3396 err_put_xrcd:
3397 if (cmd->srq_type == IB_SRQT_XRC) {
3398 atomic_dec(&obj->uxrcd->refcnt);
3399 put_uobj_read(xrcd_uobj);
3400 }
3401
3402 err:
3403 put_uobj_write(&obj->uevent.uobject);
3404 return ret;
3405 }
3406
3407 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3408 struct ib_device *ib_dev,
3409 const char __user *buf, int in_len,
3410 int out_len)
3411 {
3412 struct ib_uverbs_create_srq cmd;
3413 struct ib_uverbs_create_xsrq xcmd;
3414 struct ib_uverbs_create_srq_resp resp;
3415 struct ib_udata udata;
3416 int ret;
3417
3418 if (out_len < sizeof resp)
3419 return -ENOSPC;
3420
3421 if (copy_from_user(&cmd, buf, sizeof cmd))
3422 return -EFAULT;
3423
3424 xcmd.response = cmd.response;
3425 xcmd.user_handle = cmd.user_handle;
3426 xcmd.srq_type = IB_SRQT_BASIC;
3427 xcmd.pd_handle = cmd.pd_handle;
3428 xcmd.max_wr = cmd.max_wr;
3429 xcmd.max_sge = cmd.max_sge;
3430 xcmd.srq_limit = cmd.srq_limit;
3431
3432 INIT_UDATA(&udata, buf + sizeof cmd,
3433 (unsigned long) cmd.response + sizeof resp,
3434 in_len - sizeof cmd, out_len - sizeof resp);
3435
3436 ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3437 if (ret)
3438 return ret;
3439
3440 return in_len;
3441 }
3442
3443 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3444 struct ib_device *ib_dev,
3445 const char __user *buf, int in_len, int out_len)
3446 {
3447 struct ib_uverbs_create_xsrq cmd;
3448 struct ib_uverbs_create_srq_resp resp;
3449 struct ib_udata udata;
3450 int ret;
3451
3452 if (out_len < sizeof resp)
3453 return -ENOSPC;
3454
3455 if (copy_from_user(&cmd, buf, sizeof cmd))
3456 return -EFAULT;
3457
3458 INIT_UDATA(&udata, buf + sizeof cmd,
3459 (unsigned long) cmd.response + sizeof resp,
3460 in_len - sizeof cmd, out_len - sizeof resp);
3461
3462 ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3463 if (ret)
3464 return ret;
3465
3466 return in_len;
3467 }
3468
3469 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3470 struct ib_device *ib_dev,
3471 const char __user *buf, int in_len,
3472 int out_len)
3473 {
3474 struct ib_uverbs_modify_srq cmd;
3475 struct ib_udata udata;
3476 struct ib_srq *srq;
3477 struct ib_srq_attr attr;
3478 int ret;
3479
3480 if (copy_from_user(&cmd, buf, sizeof cmd))
3481 return -EFAULT;
3482
3483 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3484 out_len);
3485
3486 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3487 if (!srq)
3488 return -EINVAL;
3489
3490 attr.max_wr = cmd.max_wr;
3491 attr.srq_limit = cmd.srq_limit;
3492
3493 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3494
3495 put_srq_read(srq);
3496
3497 return ret ? ret : in_len;
3498 }
3499
3500 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3501 struct ib_device *ib_dev,
3502 const char __user *buf,
3503 int in_len, int out_len)
3504 {
3505 struct ib_uverbs_query_srq cmd;
3506 struct ib_uverbs_query_srq_resp resp;
3507 struct ib_srq_attr attr;
3508 struct ib_srq *srq;
3509 int ret;
3510
3511 if (out_len < sizeof resp)
3512 return -ENOSPC;
3513
3514 if (copy_from_user(&cmd, buf, sizeof cmd))
3515 return -EFAULT;
3516
3517 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3518 if (!srq)
3519 return -EINVAL;
3520
3521 ret = ib_query_srq(srq, &attr);
3522
3523 put_srq_read(srq);
3524
3525 if (ret)
3526 return ret;
3527
3528 memset(&resp, 0, sizeof resp);
3529
3530 resp.max_wr = attr.max_wr;
3531 resp.max_sge = attr.max_sge;
3532 resp.srq_limit = attr.srq_limit;
3533
3534 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3535 &resp, sizeof resp))
3536 return -EFAULT;
3537
3538 return in_len;
3539 }
3540
3541 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3542 struct ib_device *ib_dev,
3543 const char __user *buf, int in_len,
3544 int out_len)
3545 {
3546 struct ib_uverbs_destroy_srq cmd;
3547 struct ib_uverbs_destroy_srq_resp resp;
3548 struct ib_uobject *uobj;
3549 struct ib_srq *srq;
3550 struct ib_uevent_object *obj;
3551 int ret = -EINVAL;
3552 struct ib_usrq_object *us;
3553 enum ib_srq_type srq_type;
3554
3555 if (copy_from_user(&cmd, buf, sizeof cmd))
3556 return -EFAULT;
3557
3558 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3559 if (!uobj)
3560 return -EINVAL;
3561 srq = uobj->object;
3562 obj = container_of(uobj, struct ib_uevent_object, uobject);
3563 srq_type = srq->srq_type;
3564
3565 ret = ib_destroy_srq(srq);
3566 if (!ret)
3567 uobj->live = 0;
3568
3569 put_uobj_write(uobj);
3570
3571 if (ret)
3572 return ret;
3573
3574 if (srq_type == IB_SRQT_XRC) {
3575 us = container_of(obj, struct ib_usrq_object, uevent);
3576 atomic_dec(&us->uxrcd->refcnt);
3577 }
3578
3579 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
3580
3581 mutex_lock(&file->mutex);
3582 list_del(&uobj->list);
3583 mutex_unlock(&file->mutex);
3584
3585 ib_uverbs_release_uevent(file, obj);
3586
3587 memset(&resp, 0, sizeof resp);
3588 resp.events_reported = obj->events_reported;
3589
3590 put_uobj(uobj);
3591
3592 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3593 &resp, sizeof resp))
3594 ret = -EFAULT;
3595
3596 return ret ? ret : in_len;
3597 }
3598
3599 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3600 struct ib_device *ib_dev,
3601 struct ib_udata *ucore,
3602 struct ib_udata *uhw)
3603 {
3604 struct ib_uverbs_ex_query_device_resp resp;
3605 struct ib_uverbs_ex_query_device cmd;
3606 struct ib_device_attr attr;
3607 int err;
3608
3609 if (ucore->inlen < sizeof(cmd))
3610 return -EINVAL;
3611
3612 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3613 if (err)
3614 return err;
3615
3616 if (cmd.comp_mask)
3617 return -EINVAL;
3618
3619 if (cmd.reserved)
3620 return -EINVAL;
3621
3622 resp.response_length = offsetof(typeof(resp), odp_caps);
3623
3624 if (ucore->outlen < resp.response_length)
3625 return -ENOSPC;
3626
3627 memset(&attr, 0, sizeof(attr));
3628
3629 err = ib_dev->query_device(ib_dev, &attr, uhw);
3630 if (err)
3631 return err;
3632
3633 copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3634 resp.comp_mask = 0;
3635
3636 if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3637 goto end;
3638
3639 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3640 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3641 resp.odp_caps.per_transport_caps.rc_odp_caps =
3642 attr.odp_caps.per_transport_caps.rc_odp_caps;
3643 resp.odp_caps.per_transport_caps.uc_odp_caps =
3644 attr.odp_caps.per_transport_caps.uc_odp_caps;
3645 resp.odp_caps.per_transport_caps.ud_odp_caps =
3646 attr.odp_caps.per_transport_caps.ud_odp_caps;
3647 resp.odp_caps.reserved = 0;
3648 #else
3649 memset(&resp.odp_caps, 0, sizeof(resp.odp_caps));
3650 #endif
3651 resp.response_length += sizeof(resp.odp_caps);
3652
3653 if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3654 goto end;
3655
3656 resp.timestamp_mask = attr.timestamp_mask;
3657 resp.response_length += sizeof(resp.timestamp_mask);
3658
3659 if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3660 goto end;
3661
3662 resp.hca_core_clock = attr.hca_core_clock;
3663 resp.response_length += sizeof(resp.hca_core_clock);
3664
3665 end:
3666 err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3667 if (err)
3668 return err;
3669
3670 return 0;
3671 }
Linux with added FPC-III support