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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / infiniband / core / uverbs_cmd.c
blob2f0f01b70e3bd22c538cd3a4081be0a9ec3f790f
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
40 #include <asm/uaccess.h>
41
42 #include "uverbs.h"
43
44 struct uverbs_lock_class {
45 struct lock_class_key key;
46 char name[16];
47 };
48
49 static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" };
50 static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" };
51 static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" };
52 static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" };
53 static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" };
54 static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" };
55 static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" };
56 static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
57 #ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
58 static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" };
59 #endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
60
61 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen) \
62 do { \
63 (udata)->inbuf = (void __user *) (ibuf); \
64 (udata)->outbuf = (void __user *) (obuf); \
65 (udata)->inlen = (ilen); \
66 (udata)->outlen = (olen); \
67 } while (0)
68
69 /*
70 * The ib_uobject locking scheme is as follows:
71 *
72 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
73 * needs to be held during all idr operations. When an object is
74 * looked up, a reference must be taken on the object's kref before
75 * dropping this lock.
76 *
77 * - Each object also has an rwsem. This rwsem must be held for
78 * reading while an operation that uses the object is performed.
79 * For example, while registering an MR, the associated PD's
80 * uobject.mutex must be held for reading. The rwsem must be held
81 * for writing while initializing or destroying an object.
82 *
83 * - In addition, each object has a "live" flag. If this flag is not
84 * set, then lookups of the object will fail even if it is found in
85 * the idr. This handles a reader that blocks and does not acquire
86 * the rwsem until after the object is destroyed. The destroy
87 * operation will set the live flag to 0 and then drop the rwsem;
88 * this will allow the reader to acquire the rwsem, see that the
89 * live flag is 0, and then drop the rwsem and its reference to
90 * object. The underlying storage will not be freed until the last
91 * reference to the object is dropped.
92 */
93
94 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
95 struct ib_ucontext *context, struct uverbs_lock_class *c)
96 {
97 uobj->user_handle = user_handle;
98 uobj->context = context;
99 kref_init(&uobj->ref);
100 init_rwsem(&uobj->mutex);
101 lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
102 uobj->live = 0;
103 }
104
105 static void release_uobj(struct kref *kref)
106 {
107 kfree(container_of(kref, struct ib_uobject, ref));
108 }
109
110 static void put_uobj(struct ib_uobject *uobj)
111 {
112 kref_put(&uobj->ref, release_uobj);
113 }
114
115 static void put_uobj_read(struct ib_uobject *uobj)
116 {
117 up_read(&uobj->mutex);
118 put_uobj(uobj);
119 }
120
121 static void put_uobj_write(struct ib_uobject *uobj)
122 {
123 up_write(&uobj->mutex);
124 put_uobj(uobj);
125 }
126
127 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
128 {
129 int ret;
130
131 idr_preload(GFP_KERNEL);
132 spin_lock(&ib_uverbs_idr_lock);
133
134 ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT);
135 if (ret >= 0)
136 uobj->id = ret;
137
138 spin_unlock(&ib_uverbs_idr_lock);
139 idr_preload_end();
140
141 return ret < 0 ? ret : 0;
142 }
143
144 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
145 {
146 spin_lock(&ib_uverbs_idr_lock);
147 idr_remove(idr, uobj->id);
148 spin_unlock(&ib_uverbs_idr_lock);
149 }
150
151 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
152 struct ib_ucontext *context)
153 {
154 struct ib_uobject *uobj;
155
156 spin_lock(&ib_uverbs_idr_lock);
157 uobj = idr_find(idr, id);
158 if (uobj) {
159 if (uobj->context == context)
160 kref_get(&uobj->ref);
161 else
162 uobj = NULL;
163 }
164 spin_unlock(&ib_uverbs_idr_lock);
165
166 return uobj;
167 }
168
169 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
170 struct ib_ucontext *context, int nested)
171 {
172 struct ib_uobject *uobj;
173
174 uobj = __idr_get_uobj(idr, id, context);
175 if (!uobj)
176 return NULL;
177
178 if (nested)
179 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
180 else
181 down_read(&uobj->mutex);
182 if (!uobj->live) {
183 put_uobj_read(uobj);
184 return NULL;
185 }
186
187 return uobj;
188 }
189
190 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
191 struct ib_ucontext *context)
192 {
193 struct ib_uobject *uobj;
194
195 uobj = __idr_get_uobj(idr, id, context);
196 if (!uobj)
197 return NULL;
198
199 down_write(&uobj->mutex);
200 if (!uobj->live) {
201 put_uobj_write(uobj);
202 return NULL;
203 }
204
205 return uobj;
206 }
207
208 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
209 int nested)
210 {
211 struct ib_uobject *uobj;
212
213 uobj = idr_read_uobj(idr, id, context, nested);
214 return uobj ? uobj->object : NULL;
215 }
216
217 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
218 {
219 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
220 }
221
222 static void put_pd_read(struct ib_pd *pd)
223 {
224 put_uobj_read(pd->uobject);
225 }
226
227 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
228 {
229 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
230 }
231
232 static void put_cq_read(struct ib_cq *cq)
233 {
234 put_uobj_read(cq->uobject);
235 }
236
237 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
238 {
239 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
240 }
241
242 static void put_ah_read(struct ib_ah *ah)
243 {
244 put_uobj_read(ah->uobject);
245 }
246
247 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
248 {
249 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
250 }
251
252 static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context)
253 {
254 struct ib_uobject *uobj;
255
256 uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context);
257 return uobj ? uobj->object : NULL;
258 }
259
260 static void put_qp_read(struct ib_qp *qp)
261 {
262 put_uobj_read(qp->uobject);
263 }
264
265 static void put_qp_write(struct ib_qp *qp)
266 {
267 put_uobj_write(qp->uobject);
268 }
269
270 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
271 {
272 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
273 }
274
275 static void put_srq_read(struct ib_srq *srq)
276 {
277 put_uobj_read(srq->uobject);
278 }
279
280 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
281 struct ib_uobject **uobj)
282 {
283 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
284 return *uobj ? (*uobj)->object : NULL;
285 }
286
287 static void put_xrcd_read(struct ib_uobject *uobj)
288 {
289 put_uobj_read(uobj);
290 }
291
292 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
293 const char __user *buf,
294 int in_len, int out_len)
295 {
296 struct ib_uverbs_get_context cmd;
297 struct ib_uverbs_get_context_resp resp;
298 struct ib_udata udata;
299 struct ib_device *ibdev = file->device->ib_dev;
300 struct ib_ucontext *ucontext;
301 struct file *filp;
302 int ret;
303
304 if (out_len < sizeof resp)
305 return -ENOSPC;
306
307 if (copy_from_user(&cmd, buf, sizeof cmd))
308 return -EFAULT;
309
310 mutex_lock(&file->mutex);
311
312 if (file->ucontext) {
313 ret = -EINVAL;
314 goto err;
315 }
316
317 INIT_UDATA(&udata, buf + sizeof cmd,
318 (unsigned long) cmd.response + sizeof resp,
319 in_len - sizeof cmd, out_len - sizeof resp);
320
321 ucontext = ibdev->alloc_ucontext(ibdev, &udata);
322 if (IS_ERR(ucontext)) {
323 ret = PTR_ERR(ucontext);
324 goto err;
325 }
326
327 ucontext->device = ibdev;
328 INIT_LIST_HEAD(&ucontext->pd_list);
329 INIT_LIST_HEAD(&ucontext->mr_list);
330 INIT_LIST_HEAD(&ucontext->mw_list);
331 INIT_LIST_HEAD(&ucontext->cq_list);
332 INIT_LIST_HEAD(&ucontext->qp_list);
333 INIT_LIST_HEAD(&ucontext->srq_list);
334 INIT_LIST_HEAD(&ucontext->ah_list);
335 INIT_LIST_HEAD(&ucontext->xrcd_list);
336 INIT_LIST_HEAD(&ucontext->rule_list);
337 ucontext->closing = 0;
338
339 resp.num_comp_vectors = file->device->num_comp_vectors;
340
341 ret = get_unused_fd_flags(O_CLOEXEC);
342 if (ret < 0)
343 goto err_free;
344 resp.async_fd = ret;
345
346 filp = ib_uverbs_alloc_event_file(file, 1);
347 if (IS_ERR(filp)) {
348 ret = PTR_ERR(filp);
349 goto err_fd;
350 }
351
352 if (copy_to_user((void __user *) (unsigned long) cmd.response,
353 &resp, sizeof resp)) {
354 ret = -EFAULT;
355 goto err_file;
356 }
357
358 file->async_file = filp->private_data;
359
360 INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
361 ib_uverbs_event_handler);
362 ret = ib_register_event_handler(&file->event_handler);
363 if (ret)
364 goto err_file;
365
366 kref_get(&file->async_file->ref);
367 kref_get(&file->ref);
368 file->ucontext = ucontext;
369
370 fd_install(resp.async_fd, filp);
371
372 mutex_unlock(&file->mutex);
373
374 return in_len;
375
376 err_file:
377 fput(filp);
378
379 err_fd:
380 put_unused_fd(resp.async_fd);
381
382 err_free:
383 ibdev->dealloc_ucontext(ucontext);
384
385 err:
386 mutex_unlock(&file->mutex);
387 return ret;
388 }
389
390 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
391 const char __user *buf,
392 int in_len, int out_len)
393 {
394 struct ib_uverbs_query_device cmd;
395 struct ib_uverbs_query_device_resp resp;
396 struct ib_device_attr attr;
397 int ret;
398
399 if (out_len < sizeof resp)
400 return -ENOSPC;
401
402 if (copy_from_user(&cmd, buf, sizeof cmd))
403 return -EFAULT;
404
405 ret = ib_query_device(file->device->ib_dev, &attr);
406 if (ret)
407 return ret;
408
409 memset(&resp, 0, sizeof resp);
410
411 resp.fw_ver = attr.fw_ver;
412 resp.node_guid = file->device->ib_dev->node_guid;
413 resp.sys_image_guid = attr.sys_image_guid;
414 resp.max_mr_size = attr.max_mr_size;
415 resp.page_size_cap = attr.page_size_cap;
416 resp.vendor_id = attr.vendor_id;
417 resp.vendor_part_id = attr.vendor_part_id;
418 resp.hw_ver = attr.hw_ver;
419 resp.max_qp = attr.max_qp;
420 resp.max_qp_wr = attr.max_qp_wr;
421 resp.device_cap_flags = attr.device_cap_flags;
422 resp.max_sge = attr.max_sge;
423 resp.max_sge_rd = attr.max_sge_rd;
424 resp.max_cq = attr.max_cq;
425 resp.max_cqe = attr.max_cqe;
426 resp.max_mr = attr.max_mr;
427 resp.max_pd = attr.max_pd;
428 resp.max_qp_rd_atom = attr.max_qp_rd_atom;
429 resp.max_ee_rd_atom = attr.max_ee_rd_atom;
430 resp.max_res_rd_atom = attr.max_res_rd_atom;
431 resp.max_qp_init_rd_atom = attr.max_qp_init_rd_atom;
432 resp.max_ee_init_rd_atom = attr.max_ee_init_rd_atom;
433 resp.atomic_cap = attr.atomic_cap;
434 resp.max_ee = attr.max_ee;
435 resp.max_rdd = attr.max_rdd;
436 resp.max_mw = attr.max_mw;
437 resp.max_raw_ipv6_qp = attr.max_raw_ipv6_qp;
438 resp.max_raw_ethy_qp = attr.max_raw_ethy_qp;
439 resp.max_mcast_grp = attr.max_mcast_grp;
440 resp.max_mcast_qp_attach = attr.max_mcast_qp_attach;
441 resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
442 resp.max_ah = attr.max_ah;
443 resp.max_fmr = attr.max_fmr;
444 resp.max_map_per_fmr = attr.max_map_per_fmr;
445 resp.max_srq = attr.max_srq;
446 resp.max_srq_wr = attr.max_srq_wr;
447 resp.max_srq_sge = attr.max_srq_sge;
448 resp.max_pkeys = attr.max_pkeys;
449 resp.local_ca_ack_delay = attr.local_ca_ack_delay;
450 resp.phys_port_cnt = file->device->ib_dev->phys_port_cnt;
451
452 if (copy_to_user((void __user *) (unsigned long) cmd.response,
453 &resp, sizeof resp))
454 return -EFAULT;
455
456 return in_len;
457 }
458
459 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
460 const char __user *buf,
461 int in_len, int out_len)
462 {
463 struct ib_uverbs_query_port cmd;
464 struct ib_uverbs_query_port_resp resp;
465 struct ib_port_attr attr;
466 int ret;
467
468 if (out_len < sizeof resp)
469 return -ENOSPC;
470
471 if (copy_from_user(&cmd, buf, sizeof cmd))
472 return -EFAULT;
473
474 ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
475 if (ret)
476 return ret;
477
478 memset(&resp, 0, sizeof resp);
479
480 resp.state = attr.state;
481 resp.max_mtu = attr.max_mtu;
482 resp.active_mtu = attr.active_mtu;
483 resp.gid_tbl_len = attr.gid_tbl_len;
484 resp.port_cap_flags = attr.port_cap_flags;
485 resp.max_msg_sz = attr.max_msg_sz;
486 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
487 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
488 resp.pkey_tbl_len = attr.pkey_tbl_len;
489 resp.lid = attr.lid;
490 resp.sm_lid = attr.sm_lid;
491 resp.lmc = attr.lmc;
492 resp.max_vl_num = attr.max_vl_num;
493 resp.sm_sl = attr.sm_sl;
494 resp.subnet_timeout = attr.subnet_timeout;
495 resp.init_type_reply = attr.init_type_reply;
496 resp.active_width = attr.active_width;
497 resp.active_speed = attr.active_speed;
498 resp.phys_state = attr.phys_state;
499 resp.link_layer = rdma_port_get_link_layer(file->device->ib_dev,
500 cmd.port_num);
501
502 if (copy_to_user((void __user *) (unsigned long) cmd.response,
503 &resp, sizeof resp))
504 return -EFAULT;
505
506 return in_len;
507 }
508
509 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
510 const char __user *buf,
511 int in_len, int out_len)
512 {
513 struct ib_uverbs_alloc_pd cmd;
514 struct ib_uverbs_alloc_pd_resp resp;
515 struct ib_udata udata;
516 struct ib_uobject *uobj;
517 struct ib_pd *pd;
518 int ret;
519
520 if (out_len < sizeof resp)
521 return -ENOSPC;
522
523 if (copy_from_user(&cmd, buf, sizeof cmd))
524 return -EFAULT;
525
526 INIT_UDATA(&udata, buf + sizeof cmd,
527 (unsigned long) cmd.response + sizeof resp,
528 in_len - sizeof cmd, out_len - sizeof resp);
529
530 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
531 if (!uobj)
532 return -ENOMEM;
533
534 init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
535 down_write(&uobj->mutex);
536
537 pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
538 file->ucontext, &udata);
539 if (IS_ERR(pd)) {
540 ret = PTR_ERR(pd);
541 goto err;
542 }
543
544 pd->device = file->device->ib_dev;
545 pd->uobject = uobj;
546 atomic_set(&pd->usecnt, 0);
547
548 uobj->object = pd;
549 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
550 if (ret)
551 goto err_idr;
552
553 memset(&resp, 0, sizeof resp);
554 resp.pd_handle = uobj->id;
555
556 if (copy_to_user((void __user *) (unsigned long) cmd.response,
557 &resp, sizeof resp)) {
558 ret = -EFAULT;
559 goto err_copy;
560 }
561
562 mutex_lock(&file->mutex);
563 list_add_tail(&uobj->list, &file->ucontext->pd_list);
564 mutex_unlock(&file->mutex);
565
566 uobj->live = 1;
567
568 up_write(&uobj->mutex);
569
570 return in_len;
571
572 err_copy:
573 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
574
575 err_idr:
576 ib_dealloc_pd(pd);
577
578 err:
579 put_uobj_write(uobj);
580 return ret;
581 }
582
583 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
584 const char __user *buf,
585 int in_len, int out_len)
586 {
587 struct ib_uverbs_dealloc_pd cmd;
588 struct ib_uobject *uobj;
589 int ret;
590
591 if (copy_from_user(&cmd, buf, sizeof cmd))
592 return -EFAULT;
593
594 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
595 if (!uobj)
596 return -EINVAL;
597
598 ret = ib_dealloc_pd(uobj->object);
599 if (!ret)
600 uobj->live = 0;
601
602 put_uobj_write(uobj);
603
604 if (ret)
605 return ret;
606
607 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
608
609 mutex_lock(&file->mutex);
610 list_del(&uobj->list);
611 mutex_unlock(&file->mutex);
612
613 put_uobj(uobj);
614
615 return in_len;
616 }
617
618 struct xrcd_table_entry {
619 struct rb_node node;
620 struct ib_xrcd *xrcd;
621 struct inode *inode;
622 };
623
624 static int xrcd_table_insert(struct ib_uverbs_device *dev,
625 struct inode *inode,
626 struct ib_xrcd *xrcd)
627 {
628 struct xrcd_table_entry *entry, *scan;
629 struct rb_node **p = &dev->xrcd_tree.rb_node;
630 struct rb_node *parent = NULL;
631
632 entry = kmalloc(sizeof *entry, GFP_KERNEL);
633 if (!entry)
634 return -ENOMEM;
635
636 entry->xrcd = xrcd;
637 entry->inode = inode;
638
639 while (*p) {
640 parent = *p;
641 scan = rb_entry(parent, struct xrcd_table_entry, node);
642
643 if (inode < scan->inode) {
644 p = &(*p)->rb_left;
645 } else if (inode > scan->inode) {
646 p = &(*p)->rb_right;
647 } else {
648 kfree(entry);
649 return -EEXIST;
650 }
651 }
652
653 rb_link_node(&entry->node, parent, p);
654 rb_insert_color(&entry->node, &dev->xrcd_tree);
655 igrab(inode);
656 return 0;
657 }
658
659 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
660 struct inode *inode)
661 {
662 struct xrcd_table_entry *entry;
663 struct rb_node *p = dev->xrcd_tree.rb_node;
664
665 while (p) {
666 entry = rb_entry(p, struct xrcd_table_entry, node);
667
668 if (inode < entry->inode)
669 p = p->rb_left;
670 else if (inode > entry->inode)
671 p = p->rb_right;
672 else
673 return entry;
674 }
675
676 return NULL;
677 }
678
679 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
680 {
681 struct xrcd_table_entry *entry;
682
683 entry = xrcd_table_search(dev, inode);
684 if (!entry)
685 return NULL;
686
687 return entry->xrcd;
688 }
689
690 static void xrcd_table_delete(struct ib_uverbs_device *dev,
691 struct inode *inode)
692 {
693 struct xrcd_table_entry *entry;
694
695 entry = xrcd_table_search(dev, inode);
696 if (entry) {
697 iput(inode);
698 rb_erase(&entry->node, &dev->xrcd_tree);
699 kfree(entry);
700 }
701 }
702
703 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
704 const char __user *buf, int in_len,
705 int out_len)
706 {
707 struct ib_uverbs_open_xrcd cmd;
708 struct ib_uverbs_open_xrcd_resp resp;
709 struct ib_udata udata;
710 struct ib_uxrcd_object *obj;
711 struct ib_xrcd *xrcd = NULL;
712 struct fd f = {NULL, 0};
713 struct inode *inode = NULL;
714 int ret = 0;
715 int new_xrcd = 0;
716
717 if (out_len < sizeof resp)
718 return -ENOSPC;
719
720 if (copy_from_user(&cmd, buf, sizeof cmd))
721 return -EFAULT;
722
723 INIT_UDATA(&udata, buf + sizeof cmd,
724 (unsigned long) cmd.response + sizeof resp,
725 in_len - sizeof cmd, out_len - sizeof resp);
726
727 mutex_lock(&file->device->xrcd_tree_mutex);
728
729 if (cmd.fd != -1) {
730 /* search for file descriptor */
731 f = fdget(cmd.fd);
732 if (!f.file) {
733 ret = -EBADF;
734 goto err_tree_mutex_unlock;
735 }
736
737 inode = file_inode(f.file);
738 xrcd = find_xrcd(file->device, inode);
739 if (!xrcd && !(cmd.oflags & O_CREAT)) {
740 /* no file descriptor. Need CREATE flag */
741 ret = -EAGAIN;
742 goto err_tree_mutex_unlock;
743 }
744
745 if (xrcd && cmd.oflags & O_EXCL) {
746 ret = -EINVAL;
747 goto err_tree_mutex_unlock;
748 }
749 }
750
751 obj = kmalloc(sizeof *obj, GFP_KERNEL);
752 if (!obj) {
753 ret = -ENOMEM;
754 goto err_tree_mutex_unlock;
755 }
756
757 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
758
759 down_write(&obj->uobject.mutex);
760
761 if (!xrcd) {
762 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
763 file->ucontext, &udata);
764 if (IS_ERR(xrcd)) {
765 ret = PTR_ERR(xrcd);
766 goto err;
767 }
768
769 xrcd->inode = inode;
770 xrcd->device = file->device->ib_dev;
771 atomic_set(&xrcd->usecnt, 0);
772 mutex_init(&xrcd->tgt_qp_mutex);
773 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
774 new_xrcd = 1;
775 }
776
777 atomic_set(&obj->refcnt, 0);
778 obj->uobject.object = xrcd;
779 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
780 if (ret)
781 goto err_idr;
782
783 memset(&resp, 0, sizeof resp);
784 resp.xrcd_handle = obj->uobject.id;
785
786 if (inode) {
787 if (new_xrcd) {
788 /* create new inode/xrcd table entry */
789 ret = xrcd_table_insert(file->device, inode, xrcd);
790 if (ret)
791 goto err_insert_xrcd;
792 }
793 atomic_inc(&xrcd->usecnt);
794 }
795
796 if (copy_to_user((void __user *) (unsigned long) cmd.response,
797 &resp, sizeof resp)) {
798 ret = -EFAULT;
799 goto err_copy;
800 }
801
802 if (f.file)
803 fdput(f);
804
805 mutex_lock(&file->mutex);
806 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
807 mutex_unlock(&file->mutex);
808
809 obj->uobject.live = 1;
810 up_write(&obj->uobject.mutex);
811
812 mutex_unlock(&file->device->xrcd_tree_mutex);
813 return in_len;
814
815 err_copy:
816 if (inode) {
817 if (new_xrcd)
818 xrcd_table_delete(file->device, inode);
819 atomic_dec(&xrcd->usecnt);
820 }
821
822 err_insert_xrcd:
823 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
824
825 err_idr:
826 ib_dealloc_xrcd(xrcd);
827
828 err:
829 put_uobj_write(&obj->uobject);
830
831 err_tree_mutex_unlock:
832 if (f.file)
833 fdput(f);
834
835 mutex_unlock(&file->device->xrcd_tree_mutex);
836
837 return ret;
838 }
839
840 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
841 const char __user *buf, int in_len,
842 int out_len)
843 {
844 struct ib_uverbs_close_xrcd cmd;
845 struct ib_uobject *uobj;
846 struct ib_xrcd *xrcd = NULL;
847 struct inode *inode = NULL;
848 struct ib_uxrcd_object *obj;
849 int live;
850 int ret = 0;
851
852 if (copy_from_user(&cmd, buf, sizeof cmd))
853 return -EFAULT;
854
855 mutex_lock(&file->device->xrcd_tree_mutex);
856 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
857 if (!uobj) {
858 ret = -EINVAL;
859 goto out;
860 }
861
862 xrcd = uobj->object;
863 inode = xrcd->inode;
864 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
865 if (atomic_read(&obj->refcnt)) {
866 put_uobj_write(uobj);
867 ret = -EBUSY;
868 goto out;
869 }
870
871 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
872 ret = ib_dealloc_xrcd(uobj->object);
873 if (!ret)
874 uobj->live = 0;
875 }
876
877 live = uobj->live;
878 if (inode && ret)
879 atomic_inc(&xrcd->usecnt);
880
881 put_uobj_write(uobj);
882
883 if (ret)
884 goto out;
885
886 if (inode && !live)
887 xrcd_table_delete(file->device, inode);
888
889 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
890 mutex_lock(&file->mutex);
891 list_del(&uobj->list);
892 mutex_unlock(&file->mutex);
893
894 put_uobj(uobj);
895 ret = in_len;
896
897 out:
898 mutex_unlock(&file->device->xrcd_tree_mutex);
899 return ret;
900 }
901
902 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
903 struct ib_xrcd *xrcd)
904 {
905 struct inode *inode;
906
907 inode = xrcd->inode;
908 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
909 return;
910
911 ib_dealloc_xrcd(xrcd);
912
913 if (inode)
914 xrcd_table_delete(dev, inode);
915 }
916
917 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
918 const char __user *buf, int in_len,
919 int out_len)
920 {
921 struct ib_uverbs_reg_mr cmd;
922 struct ib_uverbs_reg_mr_resp resp;
923 struct ib_udata udata;
924 struct ib_uobject *uobj;
925 struct ib_pd *pd;
926 struct ib_mr *mr;
927 int ret;
928
929 if (out_len < sizeof resp)
930 return -ENOSPC;
931
932 if (copy_from_user(&cmd, buf, sizeof cmd))
933 return -EFAULT;
934
935 INIT_UDATA(&udata, buf + sizeof cmd,
936 (unsigned long) cmd.response + sizeof resp,
937 in_len - sizeof cmd, out_len - sizeof resp);
938
939 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
940 return -EINVAL;
941
942 /*
943 * Local write permission is required if remote write or
944 * remote atomic permission is also requested.
945 */
946 if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
947 !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
948 return -EINVAL;
949
950 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
951 if (!uobj)
952 return -ENOMEM;
953
954 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
955 down_write(&uobj->mutex);
956
957 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
958 if (!pd) {
959 ret = -EINVAL;
960 goto err_free;
961 }
962
963 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
964 cmd.access_flags, &udata);
965 if (IS_ERR(mr)) {
966 ret = PTR_ERR(mr);
967 goto err_put;
968 }
969
970 mr->device = pd->device;
971 mr->pd = pd;
972 mr->uobject = uobj;
973 atomic_inc(&pd->usecnt);
974 atomic_set(&mr->usecnt, 0);
975
976 uobj->object = mr;
977 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
978 if (ret)
979 goto err_unreg;
980
981 memset(&resp, 0, sizeof resp);
982 resp.lkey = mr->lkey;
983 resp.rkey = mr->rkey;
984 resp.mr_handle = uobj->id;
985
986 if (copy_to_user((void __user *) (unsigned long) cmd.response,
987 &resp, sizeof resp)) {
988 ret = -EFAULT;
989 goto err_copy;
990 }
991
992 put_pd_read(pd);
993
994 mutex_lock(&file->mutex);
995 list_add_tail(&uobj->list, &file->ucontext->mr_list);
996 mutex_unlock(&file->mutex);
997
998 uobj->live = 1;
999
1000 up_write(&uobj->mutex);
1001
1002 return in_len;
1003
1004 err_copy:
1005 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1006
1007 err_unreg:
1008 ib_dereg_mr(mr);
1009
1010 err_put:
1011 put_pd_read(pd);
1012
1013 err_free:
1014 put_uobj_write(uobj);
1015 return ret;
1016 }
1017
1018 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1019 const char __user *buf, int in_len,
1020 int out_len)
1021 {
1022 struct ib_uverbs_dereg_mr cmd;
1023 struct ib_mr *mr;
1024 struct ib_uobject *uobj;
1025 int ret = -EINVAL;
1026
1027 if (copy_from_user(&cmd, buf, sizeof cmd))
1028 return -EFAULT;
1029
1030 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1031 if (!uobj)
1032 return -EINVAL;
1033
1034 mr = uobj->object;
1035
1036 ret = ib_dereg_mr(mr);
1037 if (!ret)
1038 uobj->live = 0;
1039
1040 put_uobj_write(uobj);
1041
1042 if (ret)
1043 return ret;
1044
1045 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1046
1047 mutex_lock(&file->mutex);
1048 list_del(&uobj->list);
1049 mutex_unlock(&file->mutex);
1050
1051 put_uobj(uobj);
1052
1053 return in_len;
1054 }
1055
1056 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
1057 const char __user *buf, int in_len,
1058 int out_len)
1059 {
1060 struct ib_uverbs_alloc_mw cmd;
1061 struct ib_uverbs_alloc_mw_resp resp;
1062 struct ib_uobject *uobj;
1063 struct ib_pd *pd;
1064 struct ib_mw *mw;
1065 int ret;
1066
1067 if (out_len < sizeof(resp))
1068 return -ENOSPC;
1069
1070 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1071 return -EFAULT;
1072
1073 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
1074 if (!uobj)
1075 return -ENOMEM;
1076
1077 init_uobj(uobj, 0, file->ucontext, &mw_lock_class);
1078 down_write(&uobj->mutex);
1079
1080 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1081 if (!pd) {
1082 ret = -EINVAL;
1083 goto err_free;
1084 }
1085
1086 mw = pd->device->alloc_mw(pd, cmd.mw_type);
1087 if (IS_ERR(mw)) {
1088 ret = PTR_ERR(mw);
1089 goto err_put;
1090 }
1091
1092 mw->device = pd->device;
1093 mw->pd = pd;
1094 mw->uobject = uobj;
1095 atomic_inc(&pd->usecnt);
1096
1097 uobj->object = mw;
1098 ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj);
1099 if (ret)
1100 goto err_unalloc;
1101
1102 memset(&resp, 0, sizeof(resp));
1103 resp.rkey = mw->rkey;
1104 resp.mw_handle = uobj->id;
1105
1106 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1107 &resp, sizeof(resp))) {
1108 ret = -EFAULT;
1109 goto err_copy;
1110 }
1111
1112 put_pd_read(pd);
1113
1114 mutex_lock(&file->mutex);
1115 list_add_tail(&uobj->list, &file->ucontext->mw_list);
1116 mutex_unlock(&file->mutex);
1117
1118 uobj->live = 1;
1119
1120 up_write(&uobj->mutex);
1121
1122 return in_len;
1123
1124 err_copy:
1125 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1126
1127 err_unalloc:
1128 ib_dealloc_mw(mw);
1129
1130 err_put:
1131 put_pd_read(pd);
1132
1133 err_free:
1134 put_uobj_write(uobj);
1135 return ret;
1136 }
1137
1138 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
1139 const char __user *buf, int in_len,
1140 int out_len)
1141 {
1142 struct ib_uverbs_dealloc_mw cmd;
1143 struct ib_mw *mw;
1144 struct ib_uobject *uobj;
1145 int ret = -EINVAL;
1146
1147 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1148 return -EFAULT;
1149
1150 uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext);
1151 if (!uobj)
1152 return -EINVAL;
1153
1154 mw = uobj->object;
1155
1156 ret = ib_dealloc_mw(mw);
1157 if (!ret)
1158 uobj->live = 0;
1159
1160 put_uobj_write(uobj);
1161
1162 if (ret)
1163 return ret;
1164
1165 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1166
1167 mutex_lock(&file->mutex);
1168 list_del(&uobj->list);
1169 mutex_unlock(&file->mutex);
1170
1171 put_uobj(uobj);
1172
1173 return in_len;
1174 }
1175
1176 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1177 const char __user *buf, int in_len,
1178 int out_len)
1179 {
1180 struct ib_uverbs_create_comp_channel cmd;
1181 struct ib_uverbs_create_comp_channel_resp resp;
1182 struct file *filp;
1183 int ret;
1184
1185 if (out_len < sizeof resp)
1186 return -ENOSPC;
1187
1188 if (copy_from_user(&cmd, buf, sizeof cmd))
1189 return -EFAULT;
1190
1191 ret = get_unused_fd_flags(O_CLOEXEC);
1192 if (ret < 0)
1193 return ret;
1194 resp.fd = ret;
1195
1196 filp = ib_uverbs_alloc_event_file(file, 0);
1197 if (IS_ERR(filp)) {
1198 put_unused_fd(resp.fd);
1199 return PTR_ERR(filp);
1200 }
1201
1202 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1203 &resp, sizeof resp)) {
1204 put_unused_fd(resp.fd);
1205 fput(filp);
1206 return -EFAULT;
1207 }
1208
1209 fd_install(resp.fd, filp);
1210 return in_len;
1211 }
1212
1213 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1214 const char __user *buf, int in_len,
1215 int out_len)
1216 {
1217 struct ib_uverbs_create_cq cmd;
1218 struct ib_uverbs_create_cq_resp resp;
1219 struct ib_udata udata;
1220 struct ib_ucq_object *obj;
1221 struct ib_uverbs_event_file *ev_file = NULL;
1222 struct ib_cq *cq;
1223 int ret;
1224
1225 if (out_len < sizeof resp)
1226 return -ENOSPC;
1227
1228 if (copy_from_user(&cmd, buf, sizeof cmd))
1229 return -EFAULT;
1230
1231 INIT_UDATA(&udata, buf + sizeof cmd,
1232 (unsigned long) cmd.response + sizeof resp,
1233 in_len - sizeof cmd, out_len - sizeof resp);
1234
1235 if (cmd.comp_vector >= file->device->num_comp_vectors)
1236 return -EINVAL;
1237
1238 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1239 if (!obj)
1240 return -ENOMEM;
1241
1242 init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_class);
1243 down_write(&obj->uobject.mutex);
1244
1245 if (cmd.comp_channel >= 0) {
1246 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
1247 if (!ev_file) {
1248 ret = -EINVAL;
1249 goto err;
1250 }
1251 }
1252
1253 obj->uverbs_file = file;
1254 obj->comp_events_reported = 0;
1255 obj->async_events_reported = 0;
1256 INIT_LIST_HEAD(&obj->comp_list);
1257 INIT_LIST_HEAD(&obj->async_list);
1258
1259 cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
1260 cmd.comp_vector,
1261 file->ucontext, &udata);
1262 if (IS_ERR(cq)) {
1263 ret = PTR_ERR(cq);
1264 goto err_file;
1265 }
1266
1267 cq->device = file->device->ib_dev;
1268 cq->uobject = &obj->uobject;
1269 cq->comp_handler = ib_uverbs_comp_handler;
1270 cq->event_handler = ib_uverbs_cq_event_handler;
1271 cq->cq_context = ev_file;
1272 atomic_set(&cq->usecnt, 0);
1273
1274 obj->uobject.object = cq;
1275 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1276 if (ret)
1277 goto err_free;
1278
1279 memset(&resp, 0, sizeof resp);
1280 resp.cq_handle = obj->uobject.id;
1281 resp.cqe = cq->cqe;
1282
1283 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1284 &resp, sizeof resp)) {
1285 ret = -EFAULT;
1286 goto err_copy;
1287 }
1288
1289 mutex_lock(&file->mutex);
1290 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1291 mutex_unlock(&file->mutex);
1292
1293 obj->uobject.live = 1;
1294
1295 up_write(&obj->uobject.mutex);
1296
1297 return in_len;
1298
1299 err_copy:
1300 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1301
1302 err_free:
1303 ib_destroy_cq(cq);
1304
1305 err_file:
1306 if (ev_file)
1307 ib_uverbs_release_ucq(file, ev_file, obj);
1308
1309 err:
1310 put_uobj_write(&obj->uobject);
1311 return ret;
1312 }
1313
1314 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1315 const char __user *buf, int in_len,
1316 int out_len)
1317 {
1318 struct ib_uverbs_resize_cq cmd;
1319 struct ib_uverbs_resize_cq_resp resp;
1320 struct ib_udata udata;
1321 struct ib_cq *cq;
1322 int ret = -EINVAL;
1323
1324 if (copy_from_user(&cmd, buf, sizeof cmd))
1325 return -EFAULT;
1326
1327 INIT_UDATA(&udata, buf + sizeof cmd,
1328 (unsigned long) cmd.response + sizeof resp,
1329 in_len - sizeof cmd, out_len - sizeof resp);
1330
1331 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1332 if (!cq)
1333 return -EINVAL;
1334
1335 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1336 if (ret)
1337 goto out;
1338
1339 resp.cqe = cq->cqe;
1340
1341 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1342 &resp, sizeof resp.cqe))
1343 ret = -EFAULT;
1344
1345 out:
1346 put_cq_read(cq);
1347
1348 return ret ? ret : in_len;
1349 }
1350
1351 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1352 {
1353 struct ib_uverbs_wc tmp;
1354
1355 tmp.wr_id = wc->wr_id;
1356 tmp.status = wc->status;
1357 tmp.opcode = wc->opcode;
1358 tmp.vendor_err = wc->vendor_err;
1359 tmp.byte_len = wc->byte_len;
1360 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1361 tmp.qp_num = wc->qp->qp_num;
1362 tmp.src_qp = wc->src_qp;
1363 tmp.wc_flags = wc->wc_flags;
1364 tmp.pkey_index = wc->pkey_index;
1365 tmp.slid = wc->slid;
1366 tmp.sl = wc->sl;
1367 tmp.dlid_path_bits = wc->dlid_path_bits;
1368 tmp.port_num = wc->port_num;
1369 tmp.reserved = 0;
1370
1371 if (copy_to_user(dest, &tmp, sizeof tmp))
1372 return -EFAULT;
1373
1374 return 0;
1375 }
1376
1377 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1378 const char __user *buf, int in_len,
1379 int out_len)
1380 {
1381 struct ib_uverbs_poll_cq cmd;
1382 struct ib_uverbs_poll_cq_resp resp;
1383 u8 __user *header_ptr;
1384 u8 __user *data_ptr;
1385 struct ib_cq *cq;
1386 struct ib_wc wc;
1387 int ret;
1388
1389 if (copy_from_user(&cmd, buf, sizeof cmd))
1390 return -EFAULT;
1391
1392 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1393 if (!cq)
1394 return -EINVAL;
1395
1396 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1397 header_ptr = (void __user *)(unsigned long) cmd.response;
1398 data_ptr = header_ptr + sizeof resp;
1399
1400 memset(&resp, 0, sizeof resp);
1401 while (resp.count < cmd.ne) {
1402 ret = ib_poll_cq(cq, 1, &wc);
1403 if (ret < 0)
1404 goto out_put;
1405 if (!ret)
1406 break;
1407
1408 ret = copy_wc_to_user(data_ptr, &wc);
1409 if (ret)
1410 goto out_put;
1411
1412 data_ptr += sizeof(struct ib_uverbs_wc);
1413 ++resp.count;
1414 }
1415
1416 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1417 ret = -EFAULT;
1418 goto out_put;
1419 }
1420
1421 ret = in_len;
1422
1423 out_put:
1424 put_cq_read(cq);
1425 return ret;
1426 }
1427
1428 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1429 const char __user *buf, int in_len,
1430 int out_len)
1431 {
1432 struct ib_uverbs_req_notify_cq cmd;
1433 struct ib_cq *cq;
1434
1435 if (copy_from_user(&cmd, buf, sizeof cmd))
1436 return -EFAULT;
1437
1438 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1439 if (!cq)
1440 return -EINVAL;
1441
1442 ib_req_notify_cq(cq, cmd.solicited_only ?
1443 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1444
1445 put_cq_read(cq);
1446
1447 return in_len;
1448 }
1449
1450 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1451 const char __user *buf, int in_len,
1452 int out_len)
1453 {
1454 struct ib_uverbs_destroy_cq cmd;
1455 struct ib_uverbs_destroy_cq_resp resp;
1456 struct ib_uobject *uobj;
1457 struct ib_cq *cq;
1458 struct ib_ucq_object *obj;
1459 struct ib_uverbs_event_file *ev_file;
1460 int ret = -EINVAL;
1461
1462 if (copy_from_user(&cmd, buf, sizeof cmd))
1463 return -EFAULT;
1464
1465 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1466 if (!uobj)
1467 return -EINVAL;
1468 cq = uobj->object;
1469 ev_file = cq->cq_context;
1470 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1471
1472 ret = ib_destroy_cq(cq);
1473 if (!ret)
1474 uobj->live = 0;
1475
1476 put_uobj_write(uobj);
1477
1478 if (ret)
1479 return ret;
1480
1481 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1482
1483 mutex_lock(&file->mutex);
1484 list_del(&uobj->list);
1485 mutex_unlock(&file->mutex);
1486
1487 ib_uverbs_release_ucq(file, ev_file, obj);
1488
1489 memset(&resp, 0, sizeof resp);
1490 resp.comp_events_reported = obj->comp_events_reported;
1491 resp.async_events_reported = obj->async_events_reported;
1492
1493 put_uobj(uobj);
1494
1495 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1496 &resp, sizeof resp))
1497 return -EFAULT;
1498
1499 return in_len;
1500 }
1501
1502 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1503 const char __user *buf, int in_len,
1504 int out_len)
1505 {
1506 struct ib_uverbs_create_qp cmd;
1507 struct ib_uverbs_create_qp_resp resp;
1508 struct ib_udata udata;
1509 struct ib_uqp_object *obj;
1510 struct ib_device *device;
1511 struct ib_pd *pd = NULL;
1512 struct ib_xrcd *xrcd = NULL;
1513 struct ib_uobject *uninitialized_var(xrcd_uobj);
1514 struct ib_cq *scq = NULL, *rcq = NULL;
1515 struct ib_srq *srq = NULL;
1516 struct ib_qp *qp;
1517 struct ib_qp_init_attr attr;
1518 int ret;
1519
1520 if (out_len < sizeof resp)
1521 return -ENOSPC;
1522
1523 if (copy_from_user(&cmd, buf, sizeof cmd))
1524 return -EFAULT;
1525
1526 if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1527 return -EPERM;
1528
1529 INIT_UDATA(&udata, buf + sizeof cmd,
1530 (unsigned long) cmd.response + sizeof resp,
1531 in_len - sizeof cmd, out_len - sizeof resp);
1532
1533 obj = kzalloc(sizeof *obj, GFP_KERNEL);
1534 if (!obj)
1535 return -ENOMEM;
1536
1537 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1538 down_write(&obj->uevent.uobject.mutex);
1539
1540 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1541 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1542 if (!xrcd) {
1543 ret = -EINVAL;
1544 goto err_put;
1545 }
1546 device = xrcd->device;
1547 } else {
1548 if (cmd.qp_type == IB_QPT_XRC_INI) {
1549 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1550 } else {
1551 if (cmd.is_srq) {
1552 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1553 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1554 ret = -EINVAL;
1555 goto err_put;
1556 }
1557 }
1558
1559 if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1560 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1561 if (!rcq) {
1562 ret = -EINVAL;
1563 goto err_put;
1564 }
1565 }
1566 }
1567
1568 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1569 rcq = rcq ?: scq;
1570 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1571 if (!pd || !scq) {
1572 ret = -EINVAL;
1573 goto err_put;
1574 }
1575
1576 device = pd->device;
1577 }
1578
1579 attr.event_handler = ib_uverbs_qp_event_handler;
1580 attr.qp_context = file;
1581 attr.send_cq = scq;
1582 attr.recv_cq = rcq;
1583 attr.srq = srq;
1584 attr.xrcd = xrcd;
1585 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1586 attr.qp_type = cmd.qp_type;
1587 attr.create_flags = 0;
1588
1589 attr.cap.max_send_wr = cmd.max_send_wr;
1590 attr.cap.max_recv_wr = cmd.max_recv_wr;
1591 attr.cap.max_send_sge = cmd.max_send_sge;
1592 attr.cap.max_recv_sge = cmd.max_recv_sge;
1593 attr.cap.max_inline_data = cmd.max_inline_data;
1594
1595 obj->uevent.events_reported = 0;
1596 INIT_LIST_HEAD(&obj->uevent.event_list);
1597 INIT_LIST_HEAD(&obj->mcast_list);
1598
1599 if (cmd.qp_type == IB_QPT_XRC_TGT)
1600 qp = ib_create_qp(pd, &attr);
1601 else
1602 qp = device->create_qp(pd, &attr, &udata);
1603
1604 if (IS_ERR(qp)) {
1605 ret = PTR_ERR(qp);
1606 goto err_put;
1607 }
1608
1609 if (cmd.qp_type != IB_QPT_XRC_TGT) {
1610 qp->real_qp = qp;
1611 qp->device = device;
1612 qp->pd = pd;
1613 qp->send_cq = attr.send_cq;
1614 qp->recv_cq = attr.recv_cq;
1615 qp->srq = attr.srq;
1616 qp->event_handler = attr.event_handler;
1617 qp->qp_context = attr.qp_context;
1618 qp->qp_type = attr.qp_type;
1619 atomic_set(&qp->usecnt, 0);
1620 atomic_inc(&pd->usecnt);
1621 atomic_inc(&attr.send_cq->usecnt);
1622 if (attr.recv_cq)
1623 atomic_inc(&attr.recv_cq->usecnt);
1624 if (attr.srq)
1625 atomic_inc(&attr.srq->usecnt);
1626 }
1627 qp->uobject = &obj->uevent.uobject;
1628
1629 obj->uevent.uobject.object = qp;
1630 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1631 if (ret)
1632 goto err_destroy;
1633
1634 memset(&resp, 0, sizeof resp);
1635 resp.qpn = qp->qp_num;
1636 resp.qp_handle = obj->uevent.uobject.id;
1637 resp.max_recv_sge = attr.cap.max_recv_sge;
1638 resp.max_send_sge = attr.cap.max_send_sge;
1639 resp.max_recv_wr = attr.cap.max_recv_wr;
1640 resp.max_send_wr = attr.cap.max_send_wr;
1641 resp.max_inline_data = attr.cap.max_inline_data;
1642
1643 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1644 &resp, sizeof resp)) {
1645 ret = -EFAULT;
1646 goto err_copy;
1647 }
1648
1649 if (xrcd) {
1650 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1651 uobject);
1652 atomic_inc(&obj->uxrcd->refcnt);
1653 put_xrcd_read(xrcd_uobj);
1654 }
1655
1656 if (pd)
1657 put_pd_read(pd);
1658 if (scq)
1659 put_cq_read(scq);
1660 if (rcq && rcq != scq)
1661 put_cq_read(rcq);
1662 if (srq)
1663 put_srq_read(srq);
1664
1665 mutex_lock(&file->mutex);
1666 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1667 mutex_unlock(&file->mutex);
1668
1669 obj->uevent.uobject.live = 1;
1670
1671 up_write(&obj->uevent.uobject.mutex);
1672
1673 return in_len;
1674
1675 err_copy:
1676 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1677
1678 err_destroy:
1679 ib_destroy_qp(qp);
1680
1681 err_put:
1682 if (xrcd)
1683 put_xrcd_read(xrcd_uobj);
1684 if (pd)
1685 put_pd_read(pd);
1686 if (scq)
1687 put_cq_read(scq);
1688 if (rcq && rcq != scq)
1689 put_cq_read(rcq);
1690 if (srq)
1691 put_srq_read(srq);
1692
1693 put_uobj_write(&obj->uevent.uobject);
1694 return ret;
1695 }
1696
1697 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1698 const char __user *buf, int in_len, int out_len)
1699 {
1700 struct ib_uverbs_open_qp cmd;
1701 struct ib_uverbs_create_qp_resp resp;
1702 struct ib_udata udata;
1703 struct ib_uqp_object *obj;
1704 struct ib_xrcd *xrcd;
1705 struct ib_uobject *uninitialized_var(xrcd_uobj);
1706 struct ib_qp *qp;
1707 struct ib_qp_open_attr attr;
1708 int ret;
1709
1710 if (out_len < sizeof resp)
1711 return -ENOSPC;
1712
1713 if (copy_from_user(&cmd, buf, sizeof cmd))
1714 return -EFAULT;
1715
1716 INIT_UDATA(&udata, buf + sizeof cmd,
1717 (unsigned long) cmd.response + sizeof resp,
1718 in_len - sizeof cmd, out_len - sizeof resp);
1719
1720 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1721 if (!obj)
1722 return -ENOMEM;
1723
1724 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1725 down_write(&obj->uevent.uobject.mutex);
1726
1727 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1728 if (!xrcd) {
1729 ret = -EINVAL;
1730 goto err_put;
1731 }
1732
1733 attr.event_handler = ib_uverbs_qp_event_handler;
1734 attr.qp_context = file;
1735 attr.qp_num = cmd.qpn;
1736 attr.qp_type = cmd.qp_type;
1737
1738 obj->uevent.events_reported = 0;
1739 INIT_LIST_HEAD(&obj->uevent.event_list);
1740 INIT_LIST_HEAD(&obj->mcast_list);
1741
1742 qp = ib_open_qp(xrcd, &attr);
1743 if (IS_ERR(qp)) {
1744 ret = PTR_ERR(qp);
1745 goto err_put;
1746 }
1747
1748 qp->uobject = &obj->uevent.uobject;
1749
1750 obj->uevent.uobject.object = qp;
1751 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1752 if (ret)
1753 goto err_destroy;
1754
1755 memset(&resp, 0, sizeof resp);
1756 resp.qpn = qp->qp_num;
1757 resp.qp_handle = obj->uevent.uobject.id;
1758
1759 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1760 &resp, sizeof resp)) {
1761 ret = -EFAULT;
1762 goto err_remove;
1763 }
1764
1765 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1766 atomic_inc(&obj->uxrcd->refcnt);
1767 put_xrcd_read(xrcd_uobj);
1768
1769 mutex_lock(&file->mutex);
1770 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1771 mutex_unlock(&file->mutex);
1772
1773 obj->uevent.uobject.live = 1;
1774
1775 up_write(&obj->uevent.uobject.mutex);
1776
1777 return in_len;
1778
1779 err_remove:
1780 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1781
1782 err_destroy:
1783 ib_destroy_qp(qp);
1784
1785 err_put:
1786 put_xrcd_read(xrcd_uobj);
1787 put_uobj_write(&obj->uevent.uobject);
1788 return ret;
1789 }
1790
1791 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1792 const char __user *buf, int in_len,
1793 int out_len)
1794 {
1795 struct ib_uverbs_query_qp cmd;
1796 struct ib_uverbs_query_qp_resp resp;
1797 struct ib_qp *qp;
1798 struct ib_qp_attr *attr;
1799 struct ib_qp_init_attr *init_attr;
1800 int ret;
1801
1802 if (copy_from_user(&cmd, buf, sizeof cmd))
1803 return -EFAULT;
1804
1805 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1806 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1807 if (!attr || !init_attr) {
1808 ret = -ENOMEM;
1809 goto out;
1810 }
1811
1812 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1813 if (!qp) {
1814 ret = -EINVAL;
1815 goto out;
1816 }
1817
1818 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1819
1820 put_qp_read(qp);
1821
1822 if (ret)
1823 goto out;
1824
1825 memset(&resp, 0, sizeof resp);
1826
1827 resp.qp_state = attr->qp_state;
1828 resp.cur_qp_state = attr->cur_qp_state;
1829 resp.path_mtu = attr->path_mtu;
1830 resp.path_mig_state = attr->path_mig_state;
1831 resp.qkey = attr->qkey;
1832 resp.rq_psn = attr->rq_psn;
1833 resp.sq_psn = attr->sq_psn;
1834 resp.dest_qp_num = attr->dest_qp_num;
1835 resp.qp_access_flags = attr->qp_access_flags;
1836 resp.pkey_index = attr->pkey_index;
1837 resp.alt_pkey_index = attr->alt_pkey_index;
1838 resp.sq_draining = attr->sq_draining;
1839 resp.max_rd_atomic = attr->max_rd_atomic;
1840 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1841 resp.min_rnr_timer = attr->min_rnr_timer;
1842 resp.port_num = attr->port_num;
1843 resp.timeout = attr->timeout;
1844 resp.retry_cnt = attr->retry_cnt;
1845 resp.rnr_retry = attr->rnr_retry;
1846 resp.alt_port_num = attr->alt_port_num;
1847 resp.alt_timeout = attr->alt_timeout;
1848
1849 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1850 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
1851 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
1852 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
1853 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
1854 resp.dest.dlid = attr->ah_attr.dlid;
1855 resp.dest.sl = attr->ah_attr.sl;
1856 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
1857 resp.dest.static_rate = attr->ah_attr.static_rate;
1858 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1859 resp.dest.port_num = attr->ah_attr.port_num;
1860
1861 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1862 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
1863 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
1864 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
1865 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1866 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
1867 resp.alt_dest.sl = attr->alt_ah_attr.sl;
1868 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1869 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
1870 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1871 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
1872
1873 resp.max_send_wr = init_attr->cap.max_send_wr;
1874 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1875 resp.max_send_sge = init_attr->cap.max_send_sge;
1876 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1877 resp.max_inline_data = init_attr->cap.max_inline_data;
1878 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1879
1880 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1881 &resp, sizeof resp))
1882 ret = -EFAULT;
1883
1884 out:
1885 kfree(attr);
1886 kfree(init_attr);
1887
1888 return ret ? ret : in_len;
1889 }
1890
1891 /* Remove ignored fields set in the attribute mask */
1892 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1893 {
1894 switch (qp_type) {
1895 case IB_QPT_XRC_INI:
1896 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1897 case IB_QPT_XRC_TGT:
1898 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1899 IB_QP_RNR_RETRY);
1900 default:
1901 return mask;
1902 }
1903 }
1904
1905 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1906 const char __user *buf, int in_len,
1907 int out_len)
1908 {
1909 struct ib_uverbs_modify_qp cmd;
1910 struct ib_udata udata;
1911 struct ib_qp *qp;
1912 struct ib_qp_attr *attr;
1913 int ret;
1914
1915 if (copy_from_user(&cmd, buf, sizeof cmd))
1916 return -EFAULT;
1917
1918 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1919 out_len);
1920
1921 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1922 if (!attr)
1923 return -ENOMEM;
1924
1925 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1926 if (!qp) {
1927 ret = -EINVAL;
1928 goto out;
1929 }
1930
1931 attr->qp_state = cmd.qp_state;
1932 attr->cur_qp_state = cmd.cur_qp_state;
1933 attr->path_mtu = cmd.path_mtu;
1934 attr->path_mig_state = cmd.path_mig_state;
1935 attr->qkey = cmd.qkey;
1936 attr->rq_psn = cmd.rq_psn;
1937 attr->sq_psn = cmd.sq_psn;
1938 attr->dest_qp_num = cmd.dest_qp_num;
1939 attr->qp_access_flags = cmd.qp_access_flags;
1940 attr->pkey_index = cmd.pkey_index;
1941 attr->alt_pkey_index = cmd.alt_pkey_index;
1942 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1943 attr->max_rd_atomic = cmd.max_rd_atomic;
1944 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
1945 attr->min_rnr_timer = cmd.min_rnr_timer;
1946 attr->port_num = cmd.port_num;
1947 attr->timeout = cmd.timeout;
1948 attr->retry_cnt = cmd.retry_cnt;
1949 attr->rnr_retry = cmd.rnr_retry;
1950 attr->alt_port_num = cmd.alt_port_num;
1951 attr->alt_timeout = cmd.alt_timeout;
1952
1953 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1954 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
1955 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
1956 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
1957 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
1958 attr->ah_attr.dlid = cmd.dest.dlid;
1959 attr->ah_attr.sl = cmd.dest.sl;
1960 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
1961 attr->ah_attr.static_rate = cmd.dest.static_rate;
1962 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
1963 attr->ah_attr.port_num = cmd.dest.port_num;
1964
1965 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1966 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
1967 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
1968 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
1969 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1970 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
1971 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
1972 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
1973 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
1974 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1975 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
1976
1977 if (qp->real_qp == qp) {
1978 ret = qp->device->modify_qp(qp, attr,
1979 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
1980 } else {
1981 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
1982 }
1983
1984 put_qp_read(qp);
1985
1986 if (ret)
1987 goto out;
1988
1989 ret = in_len;
1990
1991 out:
1992 kfree(attr);
1993
1994 return ret;
1995 }
1996
1997 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1998 const char __user *buf, int in_len,
1999 int out_len)
2000 {
2001 struct ib_uverbs_destroy_qp cmd;
2002 struct ib_uverbs_destroy_qp_resp resp;
2003 struct ib_uobject *uobj;
2004 struct ib_qp *qp;
2005 struct ib_uqp_object *obj;
2006 int ret = -EINVAL;
2007
2008 if (copy_from_user(&cmd, buf, sizeof cmd))
2009 return -EFAULT;
2010
2011 memset(&resp, 0, sizeof resp);
2012
2013 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2014 if (!uobj)
2015 return -EINVAL;
2016 qp = uobj->object;
2017 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2018
2019 if (!list_empty(&obj->mcast_list)) {
2020 put_uobj_write(uobj);
2021 return -EBUSY;
2022 }
2023
2024 ret = ib_destroy_qp(qp);
2025 if (!ret)
2026 uobj->live = 0;
2027
2028 put_uobj_write(uobj);
2029
2030 if (ret)
2031 return ret;
2032
2033 if (obj->uxrcd)
2034 atomic_dec(&obj->uxrcd->refcnt);
2035
2036 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2037
2038 mutex_lock(&file->mutex);
2039 list_del(&uobj->list);
2040 mutex_unlock(&file->mutex);
2041
2042 ib_uverbs_release_uevent(file, &obj->uevent);
2043
2044 resp.events_reported = obj->uevent.events_reported;
2045
2046 put_uobj(uobj);
2047
2048 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2049 &resp, sizeof resp))
2050 return -EFAULT;
2051
2052 return in_len;
2053 }
2054
2055 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2056 const char __user *buf, int in_len,
2057 int out_len)
2058 {
2059 struct ib_uverbs_post_send cmd;
2060 struct ib_uverbs_post_send_resp resp;
2061 struct ib_uverbs_send_wr *user_wr;
2062 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
2063 struct ib_qp *qp;
2064 int i, sg_ind;
2065 int is_ud;
2066 ssize_t ret = -EINVAL;
2067
2068 if (copy_from_user(&cmd, buf, sizeof cmd))
2069 return -EFAULT;
2070
2071 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2072 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2073 return -EINVAL;
2074
2075 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2076 return -EINVAL;
2077
2078 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2079 if (!user_wr)
2080 return -ENOMEM;
2081
2082 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2083 if (!qp)
2084 goto out;
2085
2086 is_ud = qp->qp_type == IB_QPT_UD;
2087 sg_ind = 0;
2088 last = NULL;
2089 for (i = 0; i < cmd.wr_count; ++i) {
2090 if (copy_from_user(user_wr,
2091 buf + sizeof cmd + i * cmd.wqe_size,
2092 cmd.wqe_size)) {
2093 ret = -EFAULT;
2094 goto out_put;
2095 }
2096
2097 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2098 ret = -EINVAL;
2099 goto out_put;
2100 }
2101
2102 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2103 user_wr->num_sge * sizeof (struct ib_sge),
2104 GFP_KERNEL);
2105 if (!next) {
2106 ret = -ENOMEM;
2107 goto out_put;
2108 }
2109
2110 if (!last)
2111 wr = next;
2112 else
2113 last->next = next;
2114 last = next;
2115
2116 next->next = NULL;
2117 next->wr_id = user_wr->wr_id;
2118 next->num_sge = user_wr->num_sge;
2119 next->opcode = user_wr->opcode;
2120 next->send_flags = user_wr->send_flags;
2121
2122 if (is_ud) {
2123 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
2124 file->ucontext);
2125 if (!next->wr.ud.ah) {
2126 ret = -EINVAL;
2127 goto out_put;
2128 }
2129 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
2130 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
2131 } else {
2132 switch (next->opcode) {
2133 case IB_WR_RDMA_WRITE_WITH_IMM:
2134 next->ex.imm_data =
2135 (__be32 __force) user_wr->ex.imm_data;
2136 case IB_WR_RDMA_WRITE:
2137 case IB_WR_RDMA_READ:
2138 next->wr.rdma.remote_addr =
2139 user_wr->wr.rdma.remote_addr;
2140 next->wr.rdma.rkey =
2141 user_wr->wr.rdma.rkey;
2142 break;
2143 case IB_WR_SEND_WITH_IMM:
2144 next->ex.imm_data =
2145 (__be32 __force) user_wr->ex.imm_data;
2146 break;
2147 case IB_WR_SEND_WITH_INV:
2148 next->ex.invalidate_rkey =
2149 user_wr->ex.invalidate_rkey;
2150 break;
2151 case IB_WR_ATOMIC_CMP_AND_SWP:
2152 case IB_WR_ATOMIC_FETCH_AND_ADD:
2153 next->wr.atomic.remote_addr =
2154 user_wr->wr.atomic.remote_addr;
2155 next->wr.atomic.compare_add =
2156 user_wr->wr.atomic.compare_add;
2157 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2158 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2159 break;
2160 default:
2161 break;
2162 }
2163 }
2164
2165 if (next->num_sge) {
2166 next->sg_list = (void *) next +
2167 ALIGN(sizeof *next, sizeof (struct ib_sge));
2168 if (copy_from_user(next->sg_list,
2169 buf + sizeof cmd +
2170 cmd.wr_count * cmd.wqe_size +
2171 sg_ind * sizeof (struct ib_sge),
2172 next->num_sge * sizeof (struct ib_sge))) {
2173 ret = -EFAULT;
2174 goto out_put;
2175 }
2176 sg_ind += next->num_sge;
2177 } else
2178 next->sg_list = NULL;
2179 }
2180
2181 resp.bad_wr = 0;
2182 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2183 if (ret)
2184 for (next = wr; next; next = next->next) {
2185 ++resp.bad_wr;
2186 if (next == bad_wr)
2187 break;
2188 }
2189
2190 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2191 &resp, sizeof resp))
2192 ret = -EFAULT;
2193
2194 out_put:
2195 put_qp_read(qp);
2196
2197 while (wr) {
2198 if (is_ud && wr->wr.ud.ah)
2199 put_ah_read(wr->wr.ud.ah);
2200 next = wr->next;
2201 kfree(wr);
2202 wr = next;
2203 }
2204
2205 out:
2206 kfree(user_wr);
2207
2208 return ret ? ret : in_len;
2209 }
2210
2211 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2212 int in_len,
2213 u32 wr_count,
2214 u32 sge_count,
2215 u32 wqe_size)
2216 {
2217 struct ib_uverbs_recv_wr *user_wr;
2218 struct ib_recv_wr *wr = NULL, *last, *next;
2219 int sg_ind;
2220 int i;
2221 int ret;
2222
2223 if (in_len < wqe_size * wr_count +
2224 sge_count * sizeof (struct ib_uverbs_sge))
2225 return ERR_PTR(-EINVAL);
2226
2227 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2228 return ERR_PTR(-EINVAL);
2229
2230 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2231 if (!user_wr)
2232 return ERR_PTR(-ENOMEM);
2233
2234 sg_ind = 0;
2235 last = NULL;
2236 for (i = 0; i < wr_count; ++i) {
2237 if (copy_from_user(user_wr, buf + i * wqe_size,
2238 wqe_size)) {
2239 ret = -EFAULT;
2240 goto err;
2241 }
2242
2243 if (user_wr->num_sge + sg_ind > sge_count) {
2244 ret = -EINVAL;
2245 goto err;
2246 }
2247
2248 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2249 user_wr->num_sge * sizeof (struct ib_sge),
2250 GFP_KERNEL);
2251 if (!next) {
2252 ret = -ENOMEM;
2253 goto err;
2254 }
2255
2256 if (!last)
2257 wr = next;
2258 else
2259 last->next = next;
2260 last = next;
2261
2262 next->next = NULL;
2263 next->wr_id = user_wr->wr_id;
2264 next->num_sge = user_wr->num_sge;
2265
2266 if (next->num_sge) {
2267 next->sg_list = (void *) next +
2268 ALIGN(sizeof *next, sizeof (struct ib_sge));
2269 if (copy_from_user(next->sg_list,
2270 buf + wr_count * wqe_size +
2271 sg_ind * sizeof (struct ib_sge),
2272 next->num_sge * sizeof (struct ib_sge))) {
2273 ret = -EFAULT;
2274 goto err;
2275 }
2276 sg_ind += next->num_sge;
2277 } else
2278 next->sg_list = NULL;
2279 }
2280
2281 kfree(user_wr);
2282 return wr;
2283
2284 err:
2285 kfree(user_wr);
2286
2287 while (wr) {
2288 next = wr->next;
2289 kfree(wr);
2290 wr = next;
2291 }
2292
2293 return ERR_PTR(ret);
2294 }
2295
2296 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2297 const char __user *buf, int in_len,
2298 int out_len)
2299 {
2300 struct ib_uverbs_post_recv cmd;
2301 struct ib_uverbs_post_recv_resp resp;
2302 struct ib_recv_wr *wr, *next, *bad_wr;
2303 struct ib_qp *qp;
2304 ssize_t ret = -EINVAL;
2305
2306 if (copy_from_user(&cmd, buf, sizeof cmd))
2307 return -EFAULT;
2308
2309 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2310 in_len - sizeof cmd, cmd.wr_count,
2311 cmd.sge_count, cmd.wqe_size);
2312 if (IS_ERR(wr))
2313 return PTR_ERR(wr);
2314
2315 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2316 if (!qp)
2317 goto out;
2318
2319 resp.bad_wr = 0;
2320 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2321
2322 put_qp_read(qp);
2323
2324 if (ret)
2325 for (next = wr; next; next = next->next) {
2326 ++resp.bad_wr;
2327 if (next == bad_wr)
2328 break;
2329 }
2330
2331 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2332 &resp, sizeof resp))
2333 ret = -EFAULT;
2334
2335 out:
2336 while (wr) {
2337 next = wr->next;
2338 kfree(wr);
2339 wr = next;
2340 }
2341
2342 return ret ? ret : in_len;
2343 }
2344
2345 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2346 const char __user *buf, int in_len,
2347 int out_len)
2348 {
2349 struct ib_uverbs_post_srq_recv cmd;
2350 struct ib_uverbs_post_srq_recv_resp resp;
2351 struct ib_recv_wr *wr, *next, *bad_wr;
2352 struct ib_srq *srq;
2353 ssize_t ret = -EINVAL;
2354
2355 if (copy_from_user(&cmd, buf, sizeof cmd))
2356 return -EFAULT;
2357
2358 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2359 in_len - sizeof cmd, cmd.wr_count,
2360 cmd.sge_count, cmd.wqe_size);
2361 if (IS_ERR(wr))
2362 return PTR_ERR(wr);
2363
2364 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2365 if (!srq)
2366 goto out;
2367
2368 resp.bad_wr = 0;
2369 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2370
2371 put_srq_read(srq);
2372
2373 if (ret)
2374 for (next = wr; next; next = next->next) {
2375 ++resp.bad_wr;
2376 if (next == bad_wr)
2377 break;
2378 }
2379
2380 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2381 &resp, sizeof resp))
2382 ret = -EFAULT;
2383
2384 out:
2385 while (wr) {
2386 next = wr->next;
2387 kfree(wr);
2388 wr = next;
2389 }
2390
2391 return ret ? ret : in_len;
2392 }
2393
2394 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2395 const char __user *buf, int in_len,
2396 int out_len)
2397 {
2398 struct ib_uverbs_create_ah cmd;
2399 struct ib_uverbs_create_ah_resp resp;
2400 struct ib_uobject *uobj;
2401 struct ib_pd *pd;
2402 struct ib_ah *ah;
2403 struct ib_ah_attr attr;
2404 int ret;
2405
2406 if (out_len < sizeof resp)
2407 return -ENOSPC;
2408
2409 if (copy_from_user(&cmd, buf, sizeof cmd))
2410 return -EFAULT;
2411
2412 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2413 if (!uobj)
2414 return -ENOMEM;
2415
2416 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2417 down_write(&uobj->mutex);
2418
2419 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2420 if (!pd) {
2421 ret = -EINVAL;
2422 goto err;
2423 }
2424
2425 attr.dlid = cmd.attr.dlid;
2426 attr.sl = cmd.attr.sl;
2427 attr.src_path_bits = cmd.attr.src_path_bits;
2428 attr.static_rate = cmd.attr.static_rate;
2429 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2430 attr.port_num = cmd.attr.port_num;
2431 attr.grh.flow_label = cmd.attr.grh.flow_label;
2432 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2433 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2434 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2435 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2436
2437 ah = ib_create_ah(pd, &attr);
2438 if (IS_ERR(ah)) {
2439 ret = PTR_ERR(ah);
2440 goto err_put;
2441 }
2442
2443 ah->uobject = uobj;
2444 uobj->object = ah;
2445
2446 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2447 if (ret)
2448 goto err_destroy;
2449
2450 resp.ah_handle = uobj->id;
2451
2452 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2453 &resp, sizeof resp)) {
2454 ret = -EFAULT;
2455 goto err_copy;
2456 }
2457
2458 put_pd_read(pd);
2459
2460 mutex_lock(&file->mutex);
2461 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2462 mutex_unlock(&file->mutex);
2463
2464 uobj->live = 1;
2465
2466 up_write(&uobj->mutex);
2467
2468 return in_len;
2469
2470 err_copy:
2471 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2472
2473 err_destroy:
2474 ib_destroy_ah(ah);
2475
2476 err_put:
2477 put_pd_read(pd);
2478
2479 err:
2480 put_uobj_write(uobj);
2481 return ret;
2482 }
2483
2484 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2485 const char __user *buf, int in_len, int out_len)
2486 {
2487 struct ib_uverbs_destroy_ah cmd;
2488 struct ib_ah *ah;
2489 struct ib_uobject *uobj;
2490 int ret;
2491
2492 if (copy_from_user(&cmd, buf, sizeof cmd))
2493 return -EFAULT;
2494
2495 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2496 if (!uobj)
2497 return -EINVAL;
2498 ah = uobj->object;
2499
2500 ret = ib_destroy_ah(ah);
2501 if (!ret)
2502 uobj->live = 0;
2503
2504 put_uobj_write(uobj);
2505
2506 if (ret)
2507 return ret;
2508
2509 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2510
2511 mutex_lock(&file->mutex);
2512 list_del(&uobj->list);
2513 mutex_unlock(&file->mutex);
2514
2515 put_uobj(uobj);
2516
2517 return in_len;
2518 }
2519
2520 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2521 const char __user *buf, int in_len,
2522 int out_len)
2523 {
2524 struct ib_uverbs_attach_mcast cmd;
2525 struct ib_qp *qp;
2526 struct ib_uqp_object *obj;
2527 struct ib_uverbs_mcast_entry *mcast;
2528 int ret;
2529
2530 if (copy_from_user(&cmd, buf, sizeof cmd))
2531 return -EFAULT;
2532
2533 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2534 if (!qp)
2535 return -EINVAL;
2536
2537 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2538
2539 list_for_each_entry(mcast, &obj->mcast_list, list)
2540 if (cmd.mlid == mcast->lid &&
2541 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2542 ret = 0;
2543 goto out_put;
2544 }
2545
2546 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2547 if (!mcast) {
2548 ret = -ENOMEM;
2549 goto out_put;
2550 }
2551
2552 mcast->lid = cmd.mlid;
2553 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2554
2555 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2556 if (!ret)
2557 list_add_tail(&mcast->list, &obj->mcast_list);
2558 else
2559 kfree(mcast);
2560
2561 out_put:
2562 put_qp_write(qp);
2563
2564 return ret ? ret : in_len;
2565 }
2566
2567 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2568 const char __user *buf, int in_len,
2569 int out_len)
2570 {
2571 struct ib_uverbs_detach_mcast cmd;
2572 struct ib_uqp_object *obj;
2573 struct ib_qp *qp;
2574 struct ib_uverbs_mcast_entry *mcast;
2575 int ret = -EINVAL;
2576
2577 if (copy_from_user(&cmd, buf, sizeof cmd))
2578 return -EFAULT;
2579
2580 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2581 if (!qp)
2582 return -EINVAL;
2583
2584 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2585 if (ret)
2586 goto out_put;
2587
2588 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2589
2590 list_for_each_entry(mcast, &obj->mcast_list, list)
2591 if (cmd.mlid == mcast->lid &&
2592 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2593 list_del(&mcast->list);
2594 kfree(mcast);
2595 break;
2596 }
2597
2598 out_put:
2599 put_qp_write(qp);
2600
2601 return ret ? ret : in_len;
2602 }
2603
2604 #ifdef CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING
2605 static int kern_spec_to_ib_spec(struct ib_kern_spec *kern_spec,
2606 union ib_flow_spec *ib_spec)
2607 {
2608 ib_spec->type = kern_spec->type;
2609
2610 switch (ib_spec->type) {
2611 case IB_FLOW_SPEC_ETH:
2612 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
2613 if (ib_spec->eth.size != kern_spec->eth.size)
2614 return -EINVAL;
2615 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
2616 sizeof(struct ib_flow_eth_filter));
2617 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
2618 sizeof(struct ib_flow_eth_filter));
2619 break;
2620 case IB_FLOW_SPEC_IPV4:
2621 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
2622 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
2623 return -EINVAL;
2624 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
2625 sizeof(struct ib_flow_ipv4_filter));
2626 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
2627 sizeof(struct ib_flow_ipv4_filter));
2628 break;
2629 case IB_FLOW_SPEC_TCP:
2630 case IB_FLOW_SPEC_UDP:
2631 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
2632 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
2633 return -EINVAL;
2634 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
2635 sizeof(struct ib_flow_tcp_udp_filter));
2636 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
2637 sizeof(struct ib_flow_tcp_udp_filter));
2638 break;
2639 default:
2640 return -EINVAL;
2641 }
2642 return 0;
2643 }
2644
2645 ssize_t ib_uverbs_create_flow(struct ib_uverbs_file *file,
2646 const char __user *buf, int in_len,
2647 int out_len)
2648 {
2649 struct ib_uverbs_create_flow cmd;
2650 struct ib_uverbs_create_flow_resp resp;
2651 struct ib_uobject *uobj;
2652 struct ib_flow *flow_id;
2653 struct ib_kern_flow_attr *kern_flow_attr;
2654 struct ib_flow_attr *flow_attr;
2655 struct ib_qp *qp;
2656 int err = 0;
2657 void *kern_spec;
2658 void *ib_spec;
2659 int i;
2660 int kern_attr_size;
2661
2662 if (out_len < sizeof(resp))
2663 return -ENOSPC;
2664
2665 if (copy_from_user(&cmd, buf, sizeof(cmd)))
2666 return -EFAULT;
2667
2668 if (cmd.comp_mask)
2669 return -EINVAL;
2670
2671 if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
2672 !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
2673 return -EPERM;
2674
2675 if (cmd.flow_attr.num_of_specs < 0 ||
2676 cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
2677 return -EINVAL;
2678
2679 kern_attr_size = cmd.flow_attr.size - sizeof(cmd) -
2680 sizeof(struct ib_uverbs_cmd_hdr_ex);
2681
2682 if (cmd.flow_attr.size < 0 || cmd.flow_attr.size > in_len ||
2683 kern_attr_size < 0 || kern_attr_size >
2684 (cmd.flow_attr.num_of_specs * sizeof(struct ib_kern_spec)))
2685 return -EINVAL;
2686
2687 if (cmd.flow_attr.num_of_specs) {
2688 kern_flow_attr = kmalloc(cmd.flow_attr.size, GFP_KERNEL);
2689 if (!kern_flow_attr)
2690 return -ENOMEM;
2691
2692 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
2693 if (copy_from_user(kern_flow_attr + 1, buf + sizeof(cmd),
2694 kern_attr_size)) {
2695 err = -EFAULT;
2696 goto err_free_attr;
2697 }
2698 } else {
2699 kern_flow_attr = &cmd.flow_attr;
2700 kern_attr_size = sizeof(cmd.flow_attr);
2701 }
2702
2703 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
2704 if (!uobj) {
2705 err = -ENOMEM;
2706 goto err_free_attr;
2707 }
2708 init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
2709 down_write(&uobj->mutex);
2710
2711 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2712 if (!qp) {
2713 err = -EINVAL;
2714 goto err_uobj;
2715 }
2716
2717 flow_attr = kmalloc(cmd.flow_attr.size, GFP_KERNEL);
2718 if (!flow_attr) {
2719 err = -ENOMEM;
2720 goto err_put;
2721 }
2722
2723 flow_attr->type = kern_flow_attr->type;
2724 flow_attr->priority = kern_flow_attr->priority;
2725 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
2726 flow_attr->port = kern_flow_attr->port;
2727 flow_attr->flags = kern_flow_attr->flags;
2728 flow_attr->size = sizeof(*flow_attr);
2729
2730 kern_spec = kern_flow_attr + 1;
2731 ib_spec = flow_attr + 1;
2732 for (i = 0; i < flow_attr->num_of_specs && kern_attr_size > 0; i++) {
2733 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
2734 if (err)
2735 goto err_free;
2736 flow_attr->size +=
2737 ((union ib_flow_spec *) ib_spec)->size;
2738 kern_attr_size -= ((struct ib_kern_spec *) kern_spec)->size;
2739 kern_spec += ((struct ib_kern_spec *) kern_spec)->size;
2740 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
2741 }
2742 if (kern_attr_size) {
2743 pr_warn("create flow failed, %d bytes left from uverb cmd\n",
2744 kern_attr_size);
2745 goto err_free;
2746 }
2747 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
2748 if (IS_ERR(flow_id)) {
2749 err = PTR_ERR(flow_id);
2750 goto err_free;
2751 }
2752 flow_id->qp = qp;
2753 flow_id->uobject = uobj;
2754 uobj->object = flow_id;
2755
2756 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
2757 if (err)
2758 goto destroy_flow;
2759
2760 memset(&resp, 0, sizeof(resp));
2761 resp.flow_handle = uobj->id;
2762
2763 if (copy_to_user((void __user *)(unsigned long) cmd.response,
2764 &resp, sizeof(resp))) {
2765 err = -EFAULT;
2766 goto err_copy;
2767 }
2768
2769 put_qp_read(qp);
2770 mutex_lock(&file->mutex);
2771 list_add_tail(&uobj->list, &file->ucontext->rule_list);
2772 mutex_unlock(&file->mutex);
2773
2774 uobj->live = 1;
2775
2776 up_write(&uobj->mutex);
2777 kfree(flow_attr);
2778 if (cmd.flow_attr.num_of_specs)
2779 kfree(kern_flow_attr);
2780 return in_len;
2781 err_copy:
2782 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
2783 destroy_flow:
2784 ib_destroy_flow(flow_id);
2785 err_free:
2786 kfree(flow_attr);
2787 err_put:
2788 put_qp_read(qp);
2789 err_uobj:
2790 put_uobj_write(uobj);
2791 err_free_attr:
2792 if (cmd.flow_attr.num_of_specs)
2793 kfree(kern_flow_attr);
2794 return err;
2795 }
2796
2797 ssize_t ib_uverbs_destroy_flow(struct ib_uverbs_file *file,
2798 const char __user *buf, int in_len,
2799 int out_len) {
2800 struct ib_uverbs_destroy_flow cmd;
2801 struct ib_flow *flow_id;
2802 struct ib_uobject *uobj;
2803 int ret;
2804
2805 if (copy_from_user(&cmd, buf, sizeof(cmd)))
2806 return -EFAULT;
2807
2808 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
2809 file->ucontext);
2810 if (!uobj)
2811 return -EINVAL;
2812 flow_id = uobj->object;
2813
2814 ret = ib_destroy_flow(flow_id);
2815 if (!ret)
2816 uobj->live = 0;
2817
2818 put_uobj_write(uobj);
2819
2820 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
2821
2822 mutex_lock(&file->mutex);
2823 list_del(&uobj->list);
2824 mutex_unlock(&file->mutex);
2825
2826 put_uobj(uobj);
2827
2828 return ret ? ret : in_len;
2829 }
2830 #endif /* CONFIG_INFINIBAND_EXPERIMENTAL_UVERBS_FLOW_STEERING */
2831
2832 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
2833 struct ib_uverbs_create_xsrq *cmd,
2834 struct ib_udata *udata)
2835 {
2836 struct ib_uverbs_create_srq_resp resp;
2837 struct ib_usrq_object *obj;
2838 struct ib_pd *pd;
2839 struct ib_srq *srq;
2840 struct ib_uobject *uninitialized_var(xrcd_uobj);
2841 struct ib_srq_init_attr attr;
2842 int ret;
2843
2844 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2845 if (!obj)
2846 return -ENOMEM;
2847
2848 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
2849 down_write(&obj->uevent.uobject.mutex);
2850
2851 if (cmd->srq_type == IB_SRQT_XRC) {
2852 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
2853 if (!attr.ext.xrc.xrcd) {
2854 ret = -EINVAL;
2855 goto err;
2856 }
2857
2858 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2859 atomic_inc(&obj->uxrcd->refcnt);
2860
2861 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
2862 if (!attr.ext.xrc.cq) {
2863 ret = -EINVAL;
2864 goto err_put_xrcd;
2865 }
2866 }
2867
2868 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
2869 if (!pd) {
2870 ret = -EINVAL;
2871 goto err_put_cq;
2872 }
2873
2874 attr.event_handler = ib_uverbs_srq_event_handler;
2875 attr.srq_context = file;
2876 attr.srq_type = cmd->srq_type;
2877 attr.attr.max_wr = cmd->max_wr;
2878 attr.attr.max_sge = cmd->max_sge;
2879 attr.attr.srq_limit = cmd->srq_limit;
2880
2881 obj->uevent.events_reported = 0;
2882 INIT_LIST_HEAD(&obj->uevent.event_list);
2883
2884 srq = pd->device->create_srq(pd, &attr, udata);
2885 if (IS_ERR(srq)) {
2886 ret = PTR_ERR(srq);
2887 goto err_put;
2888 }
2889
2890 srq->device = pd->device;
2891 srq->pd = pd;
2892 srq->srq_type = cmd->srq_type;
2893 srq->uobject = &obj->uevent.uobject;
2894 srq->event_handler = attr.event_handler;
2895 srq->srq_context = attr.srq_context;
2896
2897 if (cmd->srq_type == IB_SRQT_XRC) {
2898 srq->ext.xrc.cq = attr.ext.xrc.cq;
2899 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
2900 atomic_inc(&attr.ext.xrc.cq->usecnt);
2901 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
2902 }
2903
2904 atomic_inc(&pd->usecnt);
2905 atomic_set(&srq->usecnt, 0);
2906
2907 obj->uevent.uobject.object = srq;
2908 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2909 if (ret)
2910 goto err_destroy;
2911
2912 memset(&resp, 0, sizeof resp);
2913 resp.srq_handle = obj->uevent.uobject.id;
2914 resp.max_wr = attr.attr.max_wr;
2915 resp.max_sge = attr.attr.max_sge;
2916 if (cmd->srq_type == IB_SRQT_XRC)
2917 resp.srqn = srq->ext.xrc.srq_num;
2918
2919 if (copy_to_user((void __user *) (unsigned long) cmd->response,
2920 &resp, sizeof resp)) {
2921 ret = -EFAULT;
2922 goto err_copy;
2923 }
2924
2925 if (cmd->srq_type == IB_SRQT_XRC) {
2926 put_uobj_read(xrcd_uobj);
2927 put_cq_read(attr.ext.xrc.cq);
2928 }
2929 put_pd_read(pd);
2930
2931 mutex_lock(&file->mutex);
2932 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
2933 mutex_unlock(&file->mutex);
2934
2935 obj->uevent.uobject.live = 1;
2936
2937 up_write(&obj->uevent.uobject.mutex);
2938
2939 return 0;
2940
2941 err_copy:
2942 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
2943
2944 err_destroy:
2945 ib_destroy_srq(srq);
2946
2947 err_put:
2948 put_pd_read(pd);
2949
2950 err_put_cq:
2951 if (cmd->srq_type == IB_SRQT_XRC)
2952 put_cq_read(attr.ext.xrc.cq);
2953
2954 err_put_xrcd:
2955 if (cmd->srq_type == IB_SRQT_XRC) {
2956 atomic_dec(&obj->uxrcd->refcnt);
2957 put_uobj_read(xrcd_uobj);
2958 }
2959
2960 err:
2961 put_uobj_write(&obj->uevent.uobject);
2962 return ret;
2963 }
2964
2965 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
2966 const char __user *buf, int in_len,
2967 int out_len)
2968 {
2969 struct ib_uverbs_create_srq cmd;
2970 struct ib_uverbs_create_xsrq xcmd;
2971 struct ib_uverbs_create_srq_resp resp;
2972 struct ib_udata udata;
2973 int ret;
2974
2975 if (out_len < sizeof resp)
2976 return -ENOSPC;
2977
2978 if (copy_from_user(&cmd, buf, sizeof cmd))
2979 return -EFAULT;
2980
2981 xcmd.response = cmd.response;
2982 xcmd.user_handle = cmd.user_handle;
2983 xcmd.srq_type = IB_SRQT_BASIC;
2984 xcmd.pd_handle = cmd.pd_handle;
2985 xcmd.max_wr = cmd.max_wr;
2986 xcmd.max_sge = cmd.max_sge;
2987 xcmd.srq_limit = cmd.srq_limit;
2988
2989 INIT_UDATA(&udata, buf + sizeof cmd,
2990 (unsigned long) cmd.response + sizeof resp,
2991 in_len - sizeof cmd, out_len - sizeof resp);
2992
2993 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
2994 if (ret)
2995 return ret;
2996
2997 return in_len;
2998 }
2999
3000 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3001 const char __user *buf, int in_len, int out_len)
3002 {
3003 struct ib_uverbs_create_xsrq cmd;
3004 struct ib_uverbs_create_srq_resp resp;
3005 struct ib_udata udata;
3006 int ret;
3007
3008 if (out_len < sizeof resp)
3009 return -ENOSPC;
3010
3011 if (copy_from_user(&cmd, buf, sizeof cmd))
3012 return -EFAULT;
3013
3014 INIT_UDATA(&udata, buf + sizeof cmd,
3015 (unsigned long) cmd.response + sizeof resp,
3016 in_len - sizeof cmd, out_len - sizeof resp);
3017
3018 ret = __uverbs_create_xsrq(file, &cmd, &udata);
3019 if (ret)
3020 return ret;
3021
3022 return in_len;
3023 }
3024
3025 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3026 const char __user *buf, int in_len,
3027 int out_len)
3028 {
3029 struct ib_uverbs_modify_srq cmd;
3030 struct ib_udata udata;
3031 struct ib_srq *srq;
3032 struct ib_srq_attr attr;
3033 int ret;
3034
3035 if (copy_from_user(&cmd, buf, sizeof cmd))
3036 return -EFAULT;
3037
3038 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3039 out_len);
3040
3041 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3042 if (!srq)
3043 return -EINVAL;
3044
3045 attr.max_wr = cmd.max_wr;
3046 attr.srq_limit = cmd.srq_limit;
3047
3048 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3049
3050 put_srq_read(srq);
3051
3052 return ret ? ret : in_len;
3053 }
3054
3055 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3056 const char __user *buf,
3057 int in_len, int out_len)
3058 {
3059 struct ib_uverbs_query_srq cmd;
3060 struct ib_uverbs_query_srq_resp resp;
3061 struct ib_srq_attr attr;
3062 struct ib_srq *srq;
3063 int ret;
3064
3065 if (out_len < sizeof resp)
3066 return -ENOSPC;
3067
3068 if (copy_from_user(&cmd, buf, sizeof cmd))
3069 return -EFAULT;
3070
3071 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3072 if (!srq)
3073 return -EINVAL;
3074
3075 ret = ib_query_srq(srq, &attr);
3076
3077 put_srq_read(srq);
3078
3079 if (ret)
3080 return ret;
3081
3082 memset(&resp, 0, sizeof resp);
3083
3084 resp.max_wr = attr.max_wr;
3085 resp.max_sge = attr.max_sge;
3086 resp.srq_limit = attr.srq_limit;
3087
3088 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3089 &resp, sizeof resp))
3090 return -EFAULT;
3091
3092 return in_len;
3093 }
3094
3095 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3096 const char __user *buf, int in_len,
3097 int out_len)
3098 {
3099 struct ib_uverbs_destroy_srq cmd;
3100 struct ib_uverbs_destroy_srq_resp resp;
3101 struct ib_uobject *uobj;
3102 struct ib_srq *srq;
3103 struct ib_uevent_object *obj;
3104 int ret = -EINVAL;
3105 struct ib_usrq_object *us;
3106 enum ib_srq_type srq_type;
3107
3108 if (copy_from_user(&cmd, buf, sizeof cmd))
3109 return -EFAULT;
3110
3111 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3112 if (!uobj)
3113 return -EINVAL;
3114 srq = uobj->object;
3115 obj = container_of(uobj, struct ib_uevent_object, uobject);
3116 srq_type = srq->srq_type;
3117
3118 ret = ib_destroy_srq(srq);
3119 if (!ret)
3120 uobj->live = 0;
3121
3122 put_uobj_write(uobj);
3123
3124 if (ret)
3125 return ret;
3126
3127 if (srq_type == IB_SRQT_XRC) {
3128 us = container_of(obj, struct ib_usrq_object, uevent);
3129 atomic_dec(&us->uxrcd->refcnt);
3130 }
3131
3132 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
3133
3134 mutex_lock(&file->mutex);
3135 list_del(&uobj->list);
3136 mutex_unlock(&file->mutex);
3137
3138 ib_uverbs_release_uevent(file, obj);
3139
3140 memset(&resp, 0, sizeof resp);
3141 resp.events_reported = obj->events_reported;
3142
3143 put_uobj(uobj);
3144
3145 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3146 &resp, sizeof resp))
3147 ret = -EFAULT;
3148
3149 return ret ? ret : in_len;
3150 }
Linux with added FPC-III support