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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / infiniband / core / uverbs_cmd.c
bloba148de35df8d4008bf2534c4920f6ff075c0e698
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 <linux/uaccess.h>
42
43 #include <rdma/uverbs_types.h>
44 #include <rdma/uverbs_std_types.h>
45 #include "rdma_core.h"
46
47 #include "uverbs.h"
48 #include "core_priv.h"
49
50 static struct ib_uverbs_completion_event_file *
51 ib_uverbs_lookup_comp_file(int fd, struct ib_ucontext *context)
52 {
53 struct ib_uobject *uobj = uobj_get_read(uobj_get_type(comp_channel),
54 fd, context);
55 struct ib_uobject_file *uobj_file;
56
57 if (IS_ERR(uobj))
58 return (void *)uobj;
59
60 uverbs_uobject_get(uobj);
61 uobj_put_read(uobj);
62
63 uobj_file = container_of(uobj, struct ib_uobject_file, uobj);
64 return container_of(uobj_file, struct ib_uverbs_completion_event_file,
65 uobj_file);
66 }
67
68 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
69 struct ib_device *ib_dev,
70 const char __user *buf,
71 int in_len, int out_len)
72 {
73 struct ib_uverbs_get_context cmd;
74 struct ib_uverbs_get_context_resp resp;
75 struct ib_udata udata;
76 struct ib_ucontext *ucontext;
77 struct file *filp;
78 struct ib_rdmacg_object cg_obj;
79 int ret;
80
81 if (out_len < sizeof resp)
82 return -ENOSPC;
83
84 if (copy_from_user(&cmd, buf, sizeof cmd))
85 return -EFAULT;
86
87 mutex_lock(&file->mutex);
88
89 if (file->ucontext) {
90 ret = -EINVAL;
91 goto err;
92 }
93
94 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
95 u64_to_user_ptr(cmd.response) + sizeof(resp),
96 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
97 out_len - sizeof(resp));
98
99 ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
100 if (ret)
101 goto err;
102
103 ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
104 if (IS_ERR(ucontext)) {
105 ret = PTR_ERR(ucontext);
106 goto err_alloc;
107 }
108
109 ucontext->device = ib_dev;
110 ucontext->cg_obj = cg_obj;
111 /* ufile is required when some objects are released */
112 ucontext->ufile = file;
113 uverbs_initialize_ucontext(ucontext);
114
115 rcu_read_lock();
116 ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
117 rcu_read_unlock();
118 ucontext->closing = 0;
119
120 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
121 ucontext->umem_tree = RB_ROOT_CACHED;
122 init_rwsem(&ucontext->umem_rwsem);
123 ucontext->odp_mrs_count = 0;
124 INIT_LIST_HEAD(&ucontext->no_private_counters);
125
126 if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
127 ucontext->invalidate_range = NULL;
128
129 #endif
130
131 resp.num_comp_vectors = file->device->num_comp_vectors;
132
133 ret = get_unused_fd_flags(O_CLOEXEC);
134 if (ret < 0)
135 goto err_free;
136 resp.async_fd = ret;
137
138 filp = ib_uverbs_alloc_async_event_file(file, ib_dev);
139 if (IS_ERR(filp)) {
140 ret = PTR_ERR(filp);
141 goto err_fd;
142 }
143
144 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
145 ret = -EFAULT;
146 goto err_file;
147 }
148
149 file->ucontext = ucontext;
150
151 fd_install(resp.async_fd, filp);
152
153 mutex_unlock(&file->mutex);
154
155 return in_len;
156
157 err_file:
158 ib_uverbs_free_async_event_file(file);
159 fput(filp);
160
161 err_fd:
162 put_unused_fd(resp.async_fd);
163
164 err_free:
165 put_pid(ucontext->tgid);
166 ib_dev->dealloc_ucontext(ucontext);
167
168 err_alloc:
169 ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
170
171 err:
172 mutex_unlock(&file->mutex);
173 return ret;
174 }
175
176 static void copy_query_dev_fields(struct ib_uverbs_file *file,
177 struct ib_device *ib_dev,
178 struct ib_uverbs_query_device_resp *resp,
179 struct ib_device_attr *attr)
180 {
181 resp->fw_ver = attr->fw_ver;
182 resp->node_guid = ib_dev->node_guid;
183 resp->sys_image_guid = attr->sys_image_guid;
184 resp->max_mr_size = attr->max_mr_size;
185 resp->page_size_cap = attr->page_size_cap;
186 resp->vendor_id = attr->vendor_id;
187 resp->vendor_part_id = attr->vendor_part_id;
188 resp->hw_ver = attr->hw_ver;
189 resp->max_qp = attr->max_qp;
190 resp->max_qp_wr = attr->max_qp_wr;
191 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags);
192 resp->max_sge = attr->max_sge;
193 resp->max_sge_rd = attr->max_sge_rd;
194 resp->max_cq = attr->max_cq;
195 resp->max_cqe = attr->max_cqe;
196 resp->max_mr = attr->max_mr;
197 resp->max_pd = attr->max_pd;
198 resp->max_qp_rd_atom = attr->max_qp_rd_atom;
199 resp->max_ee_rd_atom = attr->max_ee_rd_atom;
200 resp->max_res_rd_atom = attr->max_res_rd_atom;
201 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom;
202 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom;
203 resp->atomic_cap = attr->atomic_cap;
204 resp->max_ee = attr->max_ee;
205 resp->max_rdd = attr->max_rdd;
206 resp->max_mw = attr->max_mw;
207 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
208 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
209 resp->max_mcast_grp = attr->max_mcast_grp;
210 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
211 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
212 resp->max_ah = attr->max_ah;
213 resp->max_fmr = attr->max_fmr;
214 resp->max_map_per_fmr = attr->max_map_per_fmr;
215 resp->max_srq = attr->max_srq;
216 resp->max_srq_wr = attr->max_srq_wr;
217 resp->max_srq_sge = attr->max_srq_sge;
218 resp->max_pkeys = attr->max_pkeys;
219 resp->local_ca_ack_delay = attr->local_ca_ack_delay;
220 resp->phys_port_cnt = ib_dev->phys_port_cnt;
221 }
222
223 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
224 struct ib_device *ib_dev,
225 const char __user *buf,
226 int in_len, int out_len)
227 {
228 struct ib_uverbs_query_device cmd;
229 struct ib_uverbs_query_device_resp resp;
230
231 if (out_len < sizeof resp)
232 return -ENOSPC;
233
234 if (copy_from_user(&cmd, buf, sizeof cmd))
235 return -EFAULT;
236
237 memset(&resp, 0, sizeof resp);
238 copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs);
239
240 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
241 return -EFAULT;
242
243 return in_len;
244 }
245
246 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
247 struct ib_device *ib_dev,
248 const char __user *buf,
249 int in_len, int out_len)
250 {
251 struct ib_uverbs_query_port cmd;
252 struct ib_uverbs_query_port_resp resp;
253 struct ib_port_attr attr;
254 int ret;
255
256 if (out_len < sizeof resp)
257 return -ENOSPC;
258
259 if (copy_from_user(&cmd, buf, sizeof cmd))
260 return -EFAULT;
261
262 ret = ib_query_port(ib_dev, cmd.port_num, &attr);
263 if (ret)
264 return ret;
265
266 memset(&resp, 0, sizeof resp);
267
268 resp.state = attr.state;
269 resp.max_mtu = attr.max_mtu;
270 resp.active_mtu = attr.active_mtu;
271 resp.gid_tbl_len = attr.gid_tbl_len;
272 resp.port_cap_flags = attr.port_cap_flags;
273 resp.max_msg_sz = attr.max_msg_sz;
274 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
275 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
276 resp.pkey_tbl_len = attr.pkey_tbl_len;
277
278 if (rdma_cap_opa_ah(ib_dev, cmd.port_num)) {
279 resp.lid = OPA_TO_IB_UCAST_LID(attr.lid);
280 resp.sm_lid = OPA_TO_IB_UCAST_LID(attr.sm_lid);
281 } else {
282 resp.lid = ib_lid_cpu16(attr.lid);
283 resp.sm_lid = ib_lid_cpu16(attr.sm_lid);
284 }
285 resp.lmc = attr.lmc;
286 resp.max_vl_num = attr.max_vl_num;
287 resp.sm_sl = attr.sm_sl;
288 resp.subnet_timeout = attr.subnet_timeout;
289 resp.init_type_reply = attr.init_type_reply;
290 resp.active_width = attr.active_width;
291 resp.active_speed = attr.active_speed;
292 resp.phys_state = attr.phys_state;
293 resp.link_layer = rdma_port_get_link_layer(ib_dev,
294 cmd.port_num);
295
296 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
297 return -EFAULT;
298
299 return in_len;
300 }
301
302 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
303 struct ib_device *ib_dev,
304 const char __user *buf,
305 int in_len, int out_len)
306 {
307 struct ib_uverbs_alloc_pd cmd;
308 struct ib_uverbs_alloc_pd_resp resp;
309 struct ib_udata udata;
310 struct ib_uobject *uobj;
311 struct ib_pd *pd;
312 int ret;
313
314 if (out_len < sizeof resp)
315 return -ENOSPC;
316
317 if (copy_from_user(&cmd, buf, sizeof cmd))
318 return -EFAULT;
319
320 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
321 u64_to_user_ptr(cmd.response) + sizeof(resp),
322 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
323 out_len - sizeof(resp));
324
325 uobj = uobj_alloc(uobj_get_type(pd), file->ucontext);
326 if (IS_ERR(uobj))
327 return PTR_ERR(uobj);
328
329 pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
330 if (IS_ERR(pd)) {
331 ret = PTR_ERR(pd);
332 goto err;
333 }
334
335 pd->device = ib_dev;
336 pd->uobject = uobj;
337 pd->__internal_mr = NULL;
338 atomic_set(&pd->usecnt, 0);
339
340 uobj->object = pd;
341 memset(&resp, 0, sizeof resp);
342 resp.pd_handle = uobj->id;
343 pd->res.type = RDMA_RESTRACK_PD;
344 rdma_restrack_add(&pd->res);
345
346 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
347 ret = -EFAULT;
348 goto err_copy;
349 }
350
351 uobj_alloc_commit(uobj);
352
353 return in_len;
354
355 err_copy:
356 ib_dealloc_pd(pd);
357
358 err:
359 uobj_alloc_abort(uobj);
360 return ret;
361 }
362
363 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
364 struct ib_device *ib_dev,
365 const char __user *buf,
366 int in_len, int out_len)
367 {
368 struct ib_uverbs_dealloc_pd cmd;
369 struct ib_uobject *uobj;
370 int ret;
371
372 if (copy_from_user(&cmd, buf, sizeof cmd))
373 return -EFAULT;
374
375 uobj = uobj_get_write(uobj_get_type(pd), cmd.pd_handle,
376 file->ucontext);
377 if (IS_ERR(uobj))
378 return PTR_ERR(uobj);
379
380 ret = uobj_remove_commit(uobj);
381
382 return ret ?: in_len;
383 }
384
385 struct xrcd_table_entry {
386 struct rb_node node;
387 struct ib_xrcd *xrcd;
388 struct inode *inode;
389 };
390
391 static int xrcd_table_insert(struct ib_uverbs_device *dev,
392 struct inode *inode,
393 struct ib_xrcd *xrcd)
394 {
395 struct xrcd_table_entry *entry, *scan;
396 struct rb_node **p = &dev->xrcd_tree.rb_node;
397 struct rb_node *parent = NULL;
398
399 entry = kmalloc(sizeof *entry, GFP_KERNEL);
400 if (!entry)
401 return -ENOMEM;
402
403 entry->xrcd = xrcd;
404 entry->inode = inode;
405
406 while (*p) {
407 parent = *p;
408 scan = rb_entry(parent, struct xrcd_table_entry, node);
409
410 if (inode < scan->inode) {
411 p = &(*p)->rb_left;
412 } else if (inode > scan->inode) {
413 p = &(*p)->rb_right;
414 } else {
415 kfree(entry);
416 return -EEXIST;
417 }
418 }
419
420 rb_link_node(&entry->node, parent, p);
421 rb_insert_color(&entry->node, &dev->xrcd_tree);
422 igrab(inode);
423 return 0;
424 }
425
426 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
427 struct inode *inode)
428 {
429 struct xrcd_table_entry *entry;
430 struct rb_node *p = dev->xrcd_tree.rb_node;
431
432 while (p) {
433 entry = rb_entry(p, struct xrcd_table_entry, node);
434
435 if (inode < entry->inode)
436 p = p->rb_left;
437 else if (inode > entry->inode)
438 p = p->rb_right;
439 else
440 return entry;
441 }
442
443 return NULL;
444 }
445
446 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
447 {
448 struct xrcd_table_entry *entry;
449
450 entry = xrcd_table_search(dev, inode);
451 if (!entry)
452 return NULL;
453
454 return entry->xrcd;
455 }
456
457 static void xrcd_table_delete(struct ib_uverbs_device *dev,
458 struct inode *inode)
459 {
460 struct xrcd_table_entry *entry;
461
462 entry = xrcd_table_search(dev, inode);
463 if (entry) {
464 iput(inode);
465 rb_erase(&entry->node, &dev->xrcd_tree);
466 kfree(entry);
467 }
468 }
469
470 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
471 struct ib_device *ib_dev,
472 const char __user *buf, int in_len,
473 int out_len)
474 {
475 struct ib_uverbs_open_xrcd cmd;
476 struct ib_uverbs_open_xrcd_resp resp;
477 struct ib_udata udata;
478 struct ib_uxrcd_object *obj;
479 struct ib_xrcd *xrcd = NULL;
480 struct fd f = {NULL, 0};
481 struct inode *inode = NULL;
482 int ret = 0;
483 int new_xrcd = 0;
484
485 if (out_len < sizeof resp)
486 return -ENOSPC;
487
488 if (copy_from_user(&cmd, buf, sizeof cmd))
489 return -EFAULT;
490
491 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
492 u64_to_user_ptr(cmd.response) + sizeof(resp),
493 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
494 out_len - sizeof(resp));
495
496 mutex_lock(&file->device->xrcd_tree_mutex);
497
498 if (cmd.fd != -1) {
499 /* search for file descriptor */
500 f = fdget(cmd.fd);
501 if (!f.file) {
502 ret = -EBADF;
503 goto err_tree_mutex_unlock;
504 }
505
506 inode = file_inode(f.file);
507 xrcd = find_xrcd(file->device, inode);
508 if (!xrcd && !(cmd.oflags & O_CREAT)) {
509 /* no file descriptor. Need CREATE flag */
510 ret = -EAGAIN;
511 goto err_tree_mutex_unlock;
512 }
513
514 if (xrcd && cmd.oflags & O_EXCL) {
515 ret = -EINVAL;
516 goto err_tree_mutex_unlock;
517 }
518 }
519
520 obj = (struct ib_uxrcd_object *)uobj_alloc(uobj_get_type(xrcd),
521 file->ucontext);
522 if (IS_ERR(obj)) {
523 ret = PTR_ERR(obj);
524 goto err_tree_mutex_unlock;
525 }
526
527 if (!xrcd) {
528 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
529 if (IS_ERR(xrcd)) {
530 ret = PTR_ERR(xrcd);
531 goto err;
532 }
533
534 xrcd->inode = inode;
535 xrcd->device = ib_dev;
536 atomic_set(&xrcd->usecnt, 0);
537 mutex_init(&xrcd->tgt_qp_mutex);
538 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
539 new_xrcd = 1;
540 }
541
542 atomic_set(&obj->refcnt, 0);
543 obj->uobject.object = xrcd;
544 memset(&resp, 0, sizeof resp);
545 resp.xrcd_handle = obj->uobject.id;
546
547 if (inode) {
548 if (new_xrcd) {
549 /* create new inode/xrcd table entry */
550 ret = xrcd_table_insert(file->device, inode, xrcd);
551 if (ret)
552 goto err_dealloc_xrcd;
553 }
554 atomic_inc(&xrcd->usecnt);
555 }
556
557 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
558 ret = -EFAULT;
559 goto err_copy;
560 }
561
562 if (f.file)
563 fdput(f);
564
565 mutex_unlock(&file->device->xrcd_tree_mutex);
566
567 uobj_alloc_commit(&obj->uobject);
568
569 return in_len;
570
571 err_copy:
572 if (inode) {
573 if (new_xrcd)
574 xrcd_table_delete(file->device, inode);
575 atomic_dec(&xrcd->usecnt);
576 }
577
578 err_dealloc_xrcd:
579 ib_dealloc_xrcd(xrcd);
580
581 err:
582 uobj_alloc_abort(&obj->uobject);
583
584 err_tree_mutex_unlock:
585 if (f.file)
586 fdput(f);
587
588 mutex_unlock(&file->device->xrcd_tree_mutex);
589
590 return ret;
591 }
592
593 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
594 struct ib_device *ib_dev,
595 const char __user *buf, int in_len,
596 int out_len)
597 {
598 struct ib_uverbs_close_xrcd cmd;
599 struct ib_uobject *uobj;
600 int ret = 0;
601
602 if (copy_from_user(&cmd, buf, sizeof cmd))
603 return -EFAULT;
604
605 uobj = uobj_get_write(uobj_get_type(xrcd), cmd.xrcd_handle,
606 file->ucontext);
607 if (IS_ERR(uobj))
608 return PTR_ERR(uobj);
609
610 ret = uobj_remove_commit(uobj);
611 return ret ?: in_len;
612 }
613
614 int ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
615 struct ib_xrcd *xrcd,
616 enum rdma_remove_reason why)
617 {
618 struct inode *inode;
619 int ret;
620
621 inode = xrcd->inode;
622 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
623 return 0;
624
625 ret = ib_dealloc_xrcd(xrcd);
626
627 if (why == RDMA_REMOVE_DESTROY && ret)
628 atomic_inc(&xrcd->usecnt);
629 else if (inode)
630 xrcd_table_delete(dev, inode);
631
632 return ret;
633 }
634
635 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
636 struct ib_device *ib_dev,
637 const char __user *buf, int in_len,
638 int out_len)
639 {
640 struct ib_uverbs_reg_mr cmd;
641 struct ib_uverbs_reg_mr_resp resp;
642 struct ib_udata udata;
643 struct ib_uobject *uobj;
644 struct ib_pd *pd;
645 struct ib_mr *mr;
646 int ret;
647
648 if (out_len < sizeof resp)
649 return -ENOSPC;
650
651 if (copy_from_user(&cmd, buf, sizeof cmd))
652 return -EFAULT;
653
654 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
655 u64_to_user_ptr(cmd.response) + sizeof(resp),
656 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
657 out_len - sizeof(resp));
658
659 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
660 return -EINVAL;
661
662 ret = ib_check_mr_access(cmd.access_flags);
663 if (ret)
664 return ret;
665
666 uobj = uobj_alloc(uobj_get_type(mr), file->ucontext);
667 if (IS_ERR(uobj))
668 return PTR_ERR(uobj);
669
670 pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
671 if (!pd) {
672 ret = -EINVAL;
673 goto err_free;
674 }
675
676 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
677 if (!(pd->device->attrs.device_cap_flags &
678 IB_DEVICE_ON_DEMAND_PAGING)) {
679 pr_debug("ODP support not available\n");
680 ret = -EINVAL;
681 goto err_put;
682 }
683 }
684
685 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
686 cmd.access_flags, &udata);
687 if (IS_ERR(mr)) {
688 ret = PTR_ERR(mr);
689 goto err_put;
690 }
691
692 mr->device = pd->device;
693 mr->pd = pd;
694 mr->uobject = uobj;
695 atomic_inc(&pd->usecnt);
696
697 uobj->object = mr;
698
699 memset(&resp, 0, sizeof resp);
700 resp.lkey = mr->lkey;
701 resp.rkey = mr->rkey;
702 resp.mr_handle = uobj->id;
703
704 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
705 ret = -EFAULT;
706 goto err_copy;
707 }
708
709 uobj_put_obj_read(pd);
710
711 uobj_alloc_commit(uobj);
712
713 return in_len;
714
715 err_copy:
716 ib_dereg_mr(mr);
717
718 err_put:
719 uobj_put_obj_read(pd);
720
721 err_free:
722 uobj_alloc_abort(uobj);
723 return ret;
724 }
725
726 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
727 struct ib_device *ib_dev,
728 const char __user *buf, int in_len,
729 int out_len)
730 {
731 struct ib_uverbs_rereg_mr cmd;
732 struct ib_uverbs_rereg_mr_resp resp;
733 struct ib_udata udata;
734 struct ib_pd *pd = NULL;
735 struct ib_mr *mr;
736 struct ib_pd *old_pd;
737 int ret;
738 struct ib_uobject *uobj;
739
740 if (out_len < sizeof(resp))
741 return -ENOSPC;
742
743 if (copy_from_user(&cmd, buf, sizeof(cmd)))
744 return -EFAULT;
745
746 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
747 u64_to_user_ptr(cmd.response) + sizeof(resp),
748 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
749 out_len - sizeof(resp));
750
751 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
752 return -EINVAL;
753
754 if ((cmd.flags & IB_MR_REREG_TRANS) &&
755 (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
756 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
757 return -EINVAL;
758
759 uobj = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
760 file->ucontext);
761 if (IS_ERR(uobj))
762 return PTR_ERR(uobj);
763
764 mr = uobj->object;
765
766 if (cmd.flags & IB_MR_REREG_ACCESS) {
767 ret = ib_check_mr_access(cmd.access_flags);
768 if (ret)
769 goto put_uobjs;
770 }
771
772 if (cmd.flags & IB_MR_REREG_PD) {
773 pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
774 if (!pd) {
775 ret = -EINVAL;
776 goto put_uobjs;
777 }
778 }
779
780 old_pd = mr->pd;
781 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
782 cmd.length, cmd.hca_va,
783 cmd.access_flags, pd, &udata);
784 if (!ret) {
785 if (cmd.flags & IB_MR_REREG_PD) {
786 atomic_inc(&pd->usecnt);
787 mr->pd = pd;
788 atomic_dec(&old_pd->usecnt);
789 }
790 } else {
791 goto put_uobj_pd;
792 }
793
794 memset(&resp, 0, sizeof(resp));
795 resp.lkey = mr->lkey;
796 resp.rkey = mr->rkey;
797
798 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
799 ret = -EFAULT;
800 else
801 ret = in_len;
802
803 put_uobj_pd:
804 if (cmd.flags & IB_MR_REREG_PD)
805 uobj_put_obj_read(pd);
806
807 put_uobjs:
808 uobj_put_write(uobj);
809
810 return ret;
811 }
812
813 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
814 struct ib_device *ib_dev,
815 const char __user *buf, int in_len,
816 int out_len)
817 {
818 struct ib_uverbs_dereg_mr cmd;
819 struct ib_uobject *uobj;
820 int ret = -EINVAL;
821
822 if (copy_from_user(&cmd, buf, sizeof cmd))
823 return -EFAULT;
824
825 uobj = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
826 file->ucontext);
827 if (IS_ERR(uobj))
828 return PTR_ERR(uobj);
829
830 ret = uobj_remove_commit(uobj);
831
832 return ret ?: in_len;
833 }
834
835 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
836 struct ib_device *ib_dev,
837 const char __user *buf, int in_len,
838 int out_len)
839 {
840 struct ib_uverbs_alloc_mw cmd;
841 struct ib_uverbs_alloc_mw_resp resp;
842 struct ib_uobject *uobj;
843 struct ib_pd *pd;
844 struct ib_mw *mw;
845 struct ib_udata udata;
846 int ret;
847
848 if (out_len < sizeof(resp))
849 return -ENOSPC;
850
851 if (copy_from_user(&cmd, buf, sizeof(cmd)))
852 return -EFAULT;
853
854 uobj = uobj_alloc(uobj_get_type(mw), file->ucontext);
855 if (IS_ERR(uobj))
856 return PTR_ERR(uobj);
857
858 pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
859 if (!pd) {
860 ret = -EINVAL;
861 goto err_free;
862 }
863
864 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
865 u64_to_user_ptr(cmd.response) + sizeof(resp),
866 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
867 out_len - sizeof(resp));
868
869 mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata);
870 if (IS_ERR(mw)) {
871 ret = PTR_ERR(mw);
872 goto err_put;
873 }
874
875 mw->device = pd->device;
876 mw->pd = pd;
877 mw->uobject = uobj;
878 atomic_inc(&pd->usecnt);
879
880 uobj->object = mw;
881
882 memset(&resp, 0, sizeof(resp));
883 resp.rkey = mw->rkey;
884 resp.mw_handle = uobj->id;
885
886 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) {
887 ret = -EFAULT;
888 goto err_copy;
889 }
890
891 uobj_put_obj_read(pd);
892 uobj_alloc_commit(uobj);
893
894 return in_len;
895
896 err_copy:
897 uverbs_dealloc_mw(mw);
898 err_put:
899 uobj_put_obj_read(pd);
900 err_free:
901 uobj_alloc_abort(uobj);
902 return ret;
903 }
904
905 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
906 struct ib_device *ib_dev,
907 const char __user *buf, int in_len,
908 int out_len)
909 {
910 struct ib_uverbs_dealloc_mw cmd;
911 struct ib_uobject *uobj;
912 int ret = -EINVAL;
913
914 if (copy_from_user(&cmd, buf, sizeof(cmd)))
915 return -EFAULT;
916
917 uobj = uobj_get_write(uobj_get_type(mw), cmd.mw_handle,
918 file->ucontext);
919 if (IS_ERR(uobj))
920 return PTR_ERR(uobj);
921
922 ret = uobj_remove_commit(uobj);
923 return ret ?: in_len;
924 }
925
926 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
927 struct ib_device *ib_dev,
928 const char __user *buf, int in_len,
929 int out_len)
930 {
931 struct ib_uverbs_create_comp_channel cmd;
932 struct ib_uverbs_create_comp_channel_resp resp;
933 struct ib_uobject *uobj;
934 struct ib_uverbs_completion_event_file *ev_file;
935
936 if (out_len < sizeof resp)
937 return -ENOSPC;
938
939 if (copy_from_user(&cmd, buf, sizeof cmd))
940 return -EFAULT;
941
942 uobj = uobj_alloc(uobj_get_type(comp_channel), file->ucontext);
943 if (IS_ERR(uobj))
944 return PTR_ERR(uobj);
945
946 resp.fd = uobj->id;
947
948 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
949 uobj_file.uobj);
950 ib_uverbs_init_event_queue(&ev_file->ev_queue);
951
952 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
953 uobj_alloc_abort(uobj);
954 return -EFAULT;
955 }
956
957 uobj_alloc_commit(uobj);
958 return in_len;
959 }
960
961 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
962 struct ib_device *ib_dev,
963 struct ib_udata *ucore,
964 struct ib_udata *uhw,
965 struct ib_uverbs_ex_create_cq *cmd,
966 size_t cmd_sz,
967 int (*cb)(struct ib_uverbs_file *file,
968 struct ib_ucq_object *obj,
969 struct ib_uverbs_ex_create_cq_resp *resp,
970 struct ib_udata *udata,
971 void *context),
972 void *context)
973 {
974 struct ib_ucq_object *obj;
975 struct ib_uverbs_completion_event_file *ev_file = NULL;
976 struct ib_cq *cq;
977 int ret;
978 struct ib_uverbs_ex_create_cq_resp resp;
979 struct ib_cq_init_attr attr = {};
980
981 if (!ib_dev->create_cq)
982 return ERR_PTR(-EOPNOTSUPP);
983
984 if (cmd->comp_vector >= file->device->num_comp_vectors)
985 return ERR_PTR(-EINVAL);
986
987 obj = (struct ib_ucq_object *)uobj_alloc(uobj_get_type(cq),
988 file->ucontext);
989 if (IS_ERR(obj))
990 return obj;
991
992 if (cmd->comp_channel >= 0) {
993 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel,
994 file->ucontext);
995 if (IS_ERR(ev_file)) {
996 ret = PTR_ERR(ev_file);
997 goto err;
998 }
999 }
1000
1001 obj->uobject.user_handle = cmd->user_handle;
1002 obj->uverbs_file = file;
1003 obj->comp_events_reported = 0;
1004 obj->async_events_reported = 0;
1005 INIT_LIST_HEAD(&obj->comp_list);
1006 INIT_LIST_HEAD(&obj->async_list);
1007
1008 attr.cqe = cmd->cqe;
1009 attr.comp_vector = cmd->comp_vector;
1010
1011 if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1012 attr.flags = cmd->flags;
1013
1014 cq = ib_dev->create_cq(ib_dev, &attr, file->ucontext, uhw);
1015 if (IS_ERR(cq)) {
1016 ret = PTR_ERR(cq);
1017 goto err_file;
1018 }
1019
1020 cq->device = ib_dev;
1021 cq->uobject = &obj->uobject;
1022 cq->comp_handler = ib_uverbs_comp_handler;
1023 cq->event_handler = ib_uverbs_cq_event_handler;
1024 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL;
1025 atomic_set(&cq->usecnt, 0);
1026
1027 obj->uobject.object = cq;
1028 memset(&resp, 0, sizeof resp);
1029 resp.base.cq_handle = obj->uobject.id;
1030 resp.base.cqe = cq->cqe;
1031
1032 resp.response_length = offsetof(typeof(resp), response_length) +
1033 sizeof(resp.response_length);
1034
1035 cq->res.type = RDMA_RESTRACK_CQ;
1036 rdma_restrack_add(&cq->res);
1037
1038 ret = cb(file, obj, &resp, ucore, context);
1039 if (ret)
1040 goto err_cb;
1041
1042 uobj_alloc_commit(&obj->uobject);
1043 return obj;
1044
1045 err_cb:
1046 ib_destroy_cq(cq);
1047
1048 err_file:
1049 if (ev_file)
1050 ib_uverbs_release_ucq(file, ev_file, obj);
1051
1052 err:
1053 uobj_alloc_abort(&obj->uobject);
1054
1055 return ERR_PTR(ret);
1056 }
1057
1058 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1059 struct ib_ucq_object *obj,
1060 struct ib_uverbs_ex_create_cq_resp *resp,
1061 struct ib_udata *ucore, void *context)
1062 {
1063 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1064 return -EFAULT;
1065
1066 return 0;
1067 }
1068
1069 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1070 struct ib_device *ib_dev,
1071 const char __user *buf, int in_len,
1072 int out_len)
1073 {
1074 struct ib_uverbs_create_cq cmd;
1075 struct ib_uverbs_ex_create_cq cmd_ex;
1076 struct ib_uverbs_create_cq_resp resp;
1077 struct ib_udata ucore;
1078 struct ib_udata uhw;
1079 struct ib_ucq_object *obj;
1080
1081 if (out_len < sizeof(resp))
1082 return -ENOSPC;
1083
1084 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1085 return -EFAULT;
1086
1087 ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1088 sizeof(cmd), sizeof(resp));
1089
1090 ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1091 u64_to_user_ptr(cmd.response) + sizeof(resp),
1092 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1093 out_len - sizeof(resp));
1094
1095 memset(&cmd_ex, 0, sizeof(cmd_ex));
1096 cmd_ex.user_handle = cmd.user_handle;
1097 cmd_ex.cqe = cmd.cqe;
1098 cmd_ex.comp_vector = cmd.comp_vector;
1099 cmd_ex.comp_channel = cmd.comp_channel;
1100
1101 obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1102 offsetof(typeof(cmd_ex), comp_channel) +
1103 sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1104 NULL);
1105
1106 if (IS_ERR(obj))
1107 return PTR_ERR(obj);
1108
1109 return in_len;
1110 }
1111
1112 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1113 struct ib_ucq_object *obj,
1114 struct ib_uverbs_ex_create_cq_resp *resp,
1115 struct ib_udata *ucore, void *context)
1116 {
1117 if (ib_copy_to_udata(ucore, resp, resp->response_length))
1118 return -EFAULT;
1119
1120 return 0;
1121 }
1122
1123 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1124 struct ib_device *ib_dev,
1125 struct ib_udata *ucore,
1126 struct ib_udata *uhw)
1127 {
1128 struct ib_uverbs_ex_create_cq_resp resp;
1129 struct ib_uverbs_ex_create_cq cmd;
1130 struct ib_ucq_object *obj;
1131 int err;
1132
1133 if (ucore->inlen < sizeof(cmd))
1134 return -EINVAL;
1135
1136 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1137 if (err)
1138 return err;
1139
1140 if (cmd.comp_mask)
1141 return -EINVAL;
1142
1143 if (cmd.reserved)
1144 return -EINVAL;
1145
1146 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1147 sizeof(resp.response_length)))
1148 return -ENOSPC;
1149
1150 obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1151 min(ucore->inlen, sizeof(cmd)),
1152 ib_uverbs_ex_create_cq_cb, NULL);
1153
1154 return PTR_ERR_OR_ZERO(obj);
1155 }
1156
1157 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1158 struct ib_device *ib_dev,
1159 const char __user *buf, int in_len,
1160 int out_len)
1161 {
1162 struct ib_uverbs_resize_cq cmd;
1163 struct ib_uverbs_resize_cq_resp resp = {};
1164 struct ib_udata udata;
1165 struct ib_cq *cq;
1166 int ret = -EINVAL;
1167
1168 if (copy_from_user(&cmd, buf, sizeof cmd))
1169 return -EFAULT;
1170
1171 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1172 u64_to_user_ptr(cmd.response) + sizeof(resp),
1173 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1174 out_len - sizeof(resp));
1175
1176 cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1177 if (!cq)
1178 return -EINVAL;
1179
1180 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1181 if (ret)
1182 goto out;
1183
1184 resp.cqe = cq->cqe;
1185
1186 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp.cqe))
1187 ret = -EFAULT;
1188
1189 out:
1190 uobj_put_obj_read(cq);
1191
1192 return ret ? ret : in_len;
1193 }
1194
1195 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1196 struct ib_wc *wc)
1197 {
1198 struct ib_uverbs_wc tmp;
1199
1200 tmp.wr_id = wc->wr_id;
1201 tmp.status = wc->status;
1202 tmp.opcode = wc->opcode;
1203 tmp.vendor_err = wc->vendor_err;
1204 tmp.byte_len = wc->byte_len;
1205 tmp.ex.imm_data = wc->ex.imm_data;
1206 tmp.qp_num = wc->qp->qp_num;
1207 tmp.src_qp = wc->src_qp;
1208 tmp.wc_flags = wc->wc_flags;
1209 tmp.pkey_index = wc->pkey_index;
1210 if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1211 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid);
1212 else
1213 tmp.slid = ib_lid_cpu16(wc->slid);
1214 tmp.sl = wc->sl;
1215 tmp.dlid_path_bits = wc->dlid_path_bits;
1216 tmp.port_num = wc->port_num;
1217 tmp.reserved = 0;
1218
1219 if (copy_to_user(dest, &tmp, sizeof tmp))
1220 return -EFAULT;
1221
1222 return 0;
1223 }
1224
1225 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1226 struct ib_device *ib_dev,
1227 const char __user *buf, int in_len,
1228 int out_len)
1229 {
1230 struct ib_uverbs_poll_cq cmd;
1231 struct ib_uverbs_poll_cq_resp resp;
1232 u8 __user *header_ptr;
1233 u8 __user *data_ptr;
1234 struct ib_cq *cq;
1235 struct ib_wc wc;
1236 int ret;
1237
1238 if (copy_from_user(&cmd, buf, sizeof cmd))
1239 return -EFAULT;
1240
1241 cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1242 if (!cq)
1243 return -EINVAL;
1244
1245 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1246 header_ptr = u64_to_user_ptr(cmd.response);
1247 data_ptr = header_ptr + sizeof resp;
1248
1249 memset(&resp, 0, sizeof resp);
1250 while (resp.count < cmd.ne) {
1251 ret = ib_poll_cq(cq, 1, &wc);
1252 if (ret < 0)
1253 goto out_put;
1254 if (!ret)
1255 break;
1256
1257 ret = copy_wc_to_user(ib_dev, data_ptr, &wc);
1258 if (ret)
1259 goto out_put;
1260
1261 data_ptr += sizeof(struct ib_uverbs_wc);
1262 ++resp.count;
1263 }
1264
1265 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1266 ret = -EFAULT;
1267 goto out_put;
1268 }
1269
1270 ret = in_len;
1271
1272 out_put:
1273 uobj_put_obj_read(cq);
1274 return ret;
1275 }
1276
1277 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1278 struct ib_device *ib_dev,
1279 const char __user *buf, int in_len,
1280 int out_len)
1281 {
1282 struct ib_uverbs_req_notify_cq cmd;
1283 struct ib_cq *cq;
1284
1285 if (copy_from_user(&cmd, buf, sizeof cmd))
1286 return -EFAULT;
1287
1288 cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1289 if (!cq)
1290 return -EINVAL;
1291
1292 ib_req_notify_cq(cq, cmd.solicited_only ?
1293 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1294
1295 uobj_put_obj_read(cq);
1296
1297 return in_len;
1298 }
1299
1300 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1301 struct ib_device *ib_dev,
1302 const char __user *buf, int in_len,
1303 int out_len)
1304 {
1305 struct ib_uverbs_destroy_cq cmd;
1306 struct ib_uverbs_destroy_cq_resp resp;
1307 struct ib_uobject *uobj;
1308 struct ib_cq *cq;
1309 struct ib_ucq_object *obj;
1310 int ret = -EINVAL;
1311
1312 if (copy_from_user(&cmd, buf, sizeof cmd))
1313 return -EFAULT;
1314
1315 uobj = uobj_get_write(uobj_get_type(cq), cmd.cq_handle,
1316 file->ucontext);
1317 if (IS_ERR(uobj))
1318 return PTR_ERR(uobj);
1319
1320 /*
1321 * Make sure we don't free the memory in remove_commit as we still
1322 * needs the uobject memory to create the response.
1323 */
1324 uverbs_uobject_get(uobj);
1325 cq = uobj->object;
1326 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1327
1328 memset(&resp, 0, sizeof(resp));
1329
1330 ret = uobj_remove_commit(uobj);
1331 if (ret) {
1332 uverbs_uobject_put(uobj);
1333 return ret;
1334 }
1335
1336 resp.comp_events_reported = obj->comp_events_reported;
1337 resp.async_events_reported = obj->async_events_reported;
1338
1339 uverbs_uobject_put(uobj);
1340 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1341 return -EFAULT;
1342
1343 return in_len;
1344 }
1345
1346 static int create_qp(struct ib_uverbs_file *file,
1347 struct ib_udata *ucore,
1348 struct ib_udata *uhw,
1349 struct ib_uverbs_ex_create_qp *cmd,
1350 size_t cmd_sz,
1351 int (*cb)(struct ib_uverbs_file *file,
1352 struct ib_uverbs_ex_create_qp_resp *resp,
1353 struct ib_udata *udata),
1354 void *context)
1355 {
1356 struct ib_uqp_object *obj;
1357 struct ib_device *device;
1358 struct ib_pd *pd = NULL;
1359 struct ib_xrcd *xrcd = NULL;
1360 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT);
1361 struct ib_cq *scq = NULL, *rcq = NULL;
1362 struct ib_srq *srq = NULL;
1363 struct ib_qp *qp;
1364 char *buf;
1365 struct ib_qp_init_attr attr = {};
1366 struct ib_uverbs_ex_create_qp_resp resp;
1367 int ret;
1368 struct ib_rwq_ind_table *ind_tbl = NULL;
1369 bool has_sq = true;
1370
1371 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1372 return -EPERM;
1373
1374 obj = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1375 file->ucontext);
1376 if (IS_ERR(obj))
1377 return PTR_ERR(obj);
1378 obj->uxrcd = NULL;
1379 obj->uevent.uobject.user_handle = cmd->user_handle;
1380 mutex_init(&obj->mcast_lock);
1381
1382 if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1383 sizeof(cmd->rwq_ind_tbl_handle) &&
1384 (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1385 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1386 cmd->rwq_ind_tbl_handle,
1387 file->ucontext);
1388 if (!ind_tbl) {
1389 ret = -EINVAL;
1390 goto err_put;
1391 }
1392
1393 attr.rwq_ind_tbl = ind_tbl;
1394 }
1395
1396 if (cmd_sz > sizeof(*cmd) &&
1397 !ib_is_udata_cleared(ucore, sizeof(*cmd),
1398 cmd_sz - sizeof(*cmd))) {
1399 ret = -EOPNOTSUPP;
1400 goto err_put;
1401 }
1402
1403 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1404 ret = -EINVAL;
1405 goto err_put;
1406 }
1407
1408 if (ind_tbl && !cmd->max_send_wr)
1409 has_sq = false;
1410
1411 if (cmd->qp_type == IB_QPT_XRC_TGT) {
1412 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->pd_handle,
1413 file->ucontext);
1414
1415 if (IS_ERR(xrcd_uobj)) {
1416 ret = -EINVAL;
1417 goto err_put;
1418 }
1419
1420 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1421 if (!xrcd) {
1422 ret = -EINVAL;
1423 goto err_put;
1424 }
1425 device = xrcd->device;
1426 } else {
1427 if (cmd->qp_type == IB_QPT_XRC_INI) {
1428 cmd->max_recv_wr = 0;
1429 cmd->max_recv_sge = 0;
1430 } else {
1431 if (cmd->is_srq) {
1432 srq = uobj_get_obj_read(srq, cmd->srq_handle,
1433 file->ucontext);
1434 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1435 ret = -EINVAL;
1436 goto err_put;
1437 }
1438 }
1439
1440 if (!ind_tbl) {
1441 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1442 rcq = uobj_get_obj_read(cq, cmd->recv_cq_handle,
1443 file->ucontext);
1444 if (!rcq) {
1445 ret = -EINVAL;
1446 goto err_put;
1447 }
1448 }
1449 }
1450 }
1451
1452 if (has_sq)
1453 scq = uobj_get_obj_read(cq, cmd->send_cq_handle,
1454 file->ucontext);
1455 if (!ind_tbl)
1456 rcq = rcq ?: scq;
1457 pd = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
1458 if (!pd || (!scq && has_sq)) {
1459 ret = -EINVAL;
1460 goto err_put;
1461 }
1462
1463 device = pd->device;
1464 }
1465
1466 attr.event_handler = ib_uverbs_qp_event_handler;
1467 attr.qp_context = file;
1468 attr.send_cq = scq;
1469 attr.recv_cq = rcq;
1470 attr.srq = srq;
1471 attr.xrcd = xrcd;
1472 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1473 IB_SIGNAL_REQ_WR;
1474 attr.qp_type = cmd->qp_type;
1475 attr.create_flags = 0;
1476
1477 attr.cap.max_send_wr = cmd->max_send_wr;
1478 attr.cap.max_recv_wr = cmd->max_recv_wr;
1479 attr.cap.max_send_sge = cmd->max_send_sge;
1480 attr.cap.max_recv_sge = cmd->max_recv_sge;
1481 attr.cap.max_inline_data = cmd->max_inline_data;
1482
1483 obj->uevent.events_reported = 0;
1484 INIT_LIST_HEAD(&obj->uevent.event_list);
1485 INIT_LIST_HEAD(&obj->mcast_list);
1486
1487 if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1488 sizeof(cmd->create_flags))
1489 attr.create_flags = cmd->create_flags;
1490
1491 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1492 IB_QP_CREATE_CROSS_CHANNEL |
1493 IB_QP_CREATE_MANAGED_SEND |
1494 IB_QP_CREATE_MANAGED_RECV |
1495 IB_QP_CREATE_SCATTER_FCS |
1496 IB_QP_CREATE_CVLAN_STRIPPING |
1497 IB_QP_CREATE_SOURCE_QPN |
1498 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1499 ret = -EINVAL;
1500 goto err_put;
1501 }
1502
1503 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1504 if (!capable(CAP_NET_RAW)) {
1505 ret = -EPERM;
1506 goto err_put;
1507 }
1508
1509 attr.source_qpn = cmd->source_qpn;
1510 }
1511
1512 buf = (void *)cmd + sizeof(*cmd);
1513 if (cmd_sz > sizeof(*cmd))
1514 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1515 cmd_sz - sizeof(*cmd) - 1))) {
1516 ret = -EINVAL;
1517 goto err_put;
1518 }
1519
1520 if (cmd->qp_type == IB_QPT_XRC_TGT)
1521 qp = ib_create_qp(pd, &attr);
1522 else
1523 qp = _ib_create_qp(device, pd, &attr, uhw,
1524 &obj->uevent.uobject);
1525
1526 if (IS_ERR(qp)) {
1527 ret = PTR_ERR(qp);
1528 goto err_put;
1529 }
1530
1531 if (cmd->qp_type != IB_QPT_XRC_TGT) {
1532 ret = ib_create_qp_security(qp, device);
1533 if (ret)
1534 goto err_cb;
1535
1536 qp->real_qp = qp;
1537 qp->pd = pd;
1538 qp->send_cq = attr.send_cq;
1539 qp->recv_cq = attr.recv_cq;
1540 qp->srq = attr.srq;
1541 qp->rwq_ind_tbl = ind_tbl;
1542 qp->event_handler = attr.event_handler;
1543 qp->qp_context = attr.qp_context;
1544 qp->qp_type = attr.qp_type;
1545 atomic_set(&qp->usecnt, 0);
1546 atomic_inc(&pd->usecnt);
1547 qp->port = 0;
1548 if (attr.send_cq)
1549 atomic_inc(&attr.send_cq->usecnt);
1550 if (attr.recv_cq)
1551 atomic_inc(&attr.recv_cq->usecnt);
1552 if (attr.srq)
1553 atomic_inc(&attr.srq->usecnt);
1554 if (ind_tbl)
1555 atomic_inc(&ind_tbl->usecnt);
1556 } else {
1557 /* It is done in _ib_create_qp for other QP types */
1558 qp->uobject = &obj->uevent.uobject;
1559 }
1560
1561 obj->uevent.uobject.object = qp;
1562
1563 memset(&resp, 0, sizeof resp);
1564 resp.base.qpn = qp->qp_num;
1565 resp.base.qp_handle = obj->uevent.uobject.id;
1566 resp.base.max_recv_sge = attr.cap.max_recv_sge;
1567 resp.base.max_send_sge = attr.cap.max_send_sge;
1568 resp.base.max_recv_wr = attr.cap.max_recv_wr;
1569 resp.base.max_send_wr = attr.cap.max_send_wr;
1570 resp.base.max_inline_data = attr.cap.max_inline_data;
1571
1572 resp.response_length = offsetof(typeof(resp), response_length) +
1573 sizeof(resp.response_length);
1574
1575 ret = cb(file, &resp, ucore);
1576 if (ret)
1577 goto err_cb;
1578
1579 if (xrcd) {
1580 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1581 uobject);
1582 atomic_inc(&obj->uxrcd->refcnt);
1583 uobj_put_read(xrcd_uobj);
1584 }
1585
1586 if (pd)
1587 uobj_put_obj_read(pd);
1588 if (scq)
1589 uobj_put_obj_read(scq);
1590 if (rcq && rcq != scq)
1591 uobj_put_obj_read(rcq);
1592 if (srq)
1593 uobj_put_obj_read(srq);
1594 if (ind_tbl)
1595 uobj_put_obj_read(ind_tbl);
1596
1597 uobj_alloc_commit(&obj->uevent.uobject);
1598
1599 return 0;
1600 err_cb:
1601 ib_destroy_qp(qp);
1602
1603 err_put:
1604 if (!IS_ERR(xrcd_uobj))
1605 uobj_put_read(xrcd_uobj);
1606 if (pd)
1607 uobj_put_obj_read(pd);
1608 if (scq)
1609 uobj_put_obj_read(scq);
1610 if (rcq && rcq != scq)
1611 uobj_put_obj_read(rcq);
1612 if (srq)
1613 uobj_put_obj_read(srq);
1614 if (ind_tbl)
1615 uobj_put_obj_read(ind_tbl);
1616
1617 uobj_alloc_abort(&obj->uevent.uobject);
1618 return ret;
1619 }
1620
1621 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1622 struct ib_uverbs_ex_create_qp_resp *resp,
1623 struct ib_udata *ucore)
1624 {
1625 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1626 return -EFAULT;
1627
1628 return 0;
1629 }
1630
1631 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1632 struct ib_device *ib_dev,
1633 const char __user *buf, int in_len,
1634 int out_len)
1635 {
1636 struct ib_uverbs_create_qp cmd;
1637 struct ib_uverbs_ex_create_qp cmd_ex;
1638 struct ib_udata ucore;
1639 struct ib_udata uhw;
1640 ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1641 int err;
1642
1643 if (out_len < resp_size)
1644 return -ENOSPC;
1645
1646 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1647 return -EFAULT;
1648
1649 ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1650 sizeof(cmd), resp_size);
1651 ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1652 u64_to_user_ptr(cmd.response) + resp_size,
1653 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1654 out_len - resp_size);
1655
1656 memset(&cmd_ex, 0, sizeof(cmd_ex));
1657 cmd_ex.user_handle = cmd.user_handle;
1658 cmd_ex.pd_handle = cmd.pd_handle;
1659 cmd_ex.send_cq_handle = cmd.send_cq_handle;
1660 cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1661 cmd_ex.srq_handle = cmd.srq_handle;
1662 cmd_ex.max_send_wr = cmd.max_send_wr;
1663 cmd_ex.max_recv_wr = cmd.max_recv_wr;
1664 cmd_ex.max_send_sge = cmd.max_send_sge;
1665 cmd_ex.max_recv_sge = cmd.max_recv_sge;
1666 cmd_ex.max_inline_data = cmd.max_inline_data;
1667 cmd_ex.sq_sig_all = cmd.sq_sig_all;
1668 cmd_ex.qp_type = cmd.qp_type;
1669 cmd_ex.is_srq = cmd.is_srq;
1670
1671 err = create_qp(file, &ucore, &uhw, &cmd_ex,
1672 offsetof(typeof(cmd_ex), is_srq) +
1673 sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1674 NULL);
1675
1676 if (err)
1677 return err;
1678
1679 return in_len;
1680 }
1681
1682 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
1683 struct ib_uverbs_ex_create_qp_resp *resp,
1684 struct ib_udata *ucore)
1685 {
1686 if (ib_copy_to_udata(ucore, resp, resp->response_length))
1687 return -EFAULT;
1688
1689 return 0;
1690 }
1691
1692 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
1693 struct ib_device *ib_dev,
1694 struct ib_udata *ucore,
1695 struct ib_udata *uhw)
1696 {
1697 struct ib_uverbs_ex_create_qp_resp resp;
1698 struct ib_uverbs_ex_create_qp cmd = {0};
1699 int err;
1700
1701 if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
1702 sizeof(cmd.comp_mask)))
1703 return -EINVAL;
1704
1705 err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
1706 if (err)
1707 return err;
1708
1709 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1710 return -EINVAL;
1711
1712 if (cmd.reserved)
1713 return -EINVAL;
1714
1715 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1716 sizeof(resp.response_length)))
1717 return -ENOSPC;
1718
1719 err = create_qp(file, ucore, uhw, &cmd,
1720 min(ucore->inlen, sizeof(cmd)),
1721 ib_uverbs_ex_create_qp_cb, NULL);
1722
1723 if (err)
1724 return err;
1725
1726 return 0;
1727 }
1728
1729 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1730 struct ib_device *ib_dev,
1731 const char __user *buf, int in_len, int out_len)
1732 {
1733 struct ib_uverbs_open_qp cmd;
1734 struct ib_uverbs_create_qp_resp resp;
1735 struct ib_udata udata;
1736 struct ib_uqp_object *obj;
1737 struct ib_xrcd *xrcd;
1738 struct ib_uobject *uninitialized_var(xrcd_uobj);
1739 struct ib_qp *qp;
1740 struct ib_qp_open_attr attr;
1741 int ret;
1742
1743 if (out_len < sizeof resp)
1744 return -ENOSPC;
1745
1746 if (copy_from_user(&cmd, buf, sizeof cmd))
1747 return -EFAULT;
1748
1749 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1750 u64_to_user_ptr(cmd.response) + sizeof(resp),
1751 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1752 out_len - sizeof(resp));
1753
1754 obj = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1755 file->ucontext);
1756 if (IS_ERR(obj))
1757 return PTR_ERR(obj);
1758
1759 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd.pd_handle,
1760 file->ucontext);
1761 if (IS_ERR(xrcd_uobj)) {
1762 ret = -EINVAL;
1763 goto err_put;
1764 }
1765
1766 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1767 if (!xrcd) {
1768 ret = -EINVAL;
1769 goto err_xrcd;
1770 }
1771
1772 attr.event_handler = ib_uverbs_qp_event_handler;
1773 attr.qp_context = file;
1774 attr.qp_num = cmd.qpn;
1775 attr.qp_type = cmd.qp_type;
1776
1777 obj->uevent.events_reported = 0;
1778 INIT_LIST_HEAD(&obj->uevent.event_list);
1779 INIT_LIST_HEAD(&obj->mcast_list);
1780
1781 qp = ib_open_qp(xrcd, &attr);
1782 if (IS_ERR(qp)) {
1783 ret = PTR_ERR(qp);
1784 goto err_xrcd;
1785 }
1786
1787 obj->uevent.uobject.object = qp;
1788 obj->uevent.uobject.user_handle = cmd.user_handle;
1789
1790 memset(&resp, 0, sizeof resp);
1791 resp.qpn = qp->qp_num;
1792 resp.qp_handle = obj->uevent.uobject.id;
1793
1794 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
1795 ret = -EFAULT;
1796 goto err_destroy;
1797 }
1798
1799 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1800 atomic_inc(&obj->uxrcd->refcnt);
1801 qp->uobject = &obj->uevent.uobject;
1802 uobj_put_read(xrcd_uobj);
1803
1804
1805 uobj_alloc_commit(&obj->uevent.uobject);
1806
1807 return in_len;
1808
1809 err_destroy:
1810 ib_destroy_qp(qp);
1811 err_xrcd:
1812 uobj_put_read(xrcd_uobj);
1813 err_put:
1814 uobj_alloc_abort(&obj->uevent.uobject);
1815 return ret;
1816 }
1817
1818 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1819 struct rdma_ah_attr *rdma_attr)
1820 {
1821 const struct ib_global_route *grh;
1822
1823 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr);
1824 uverb_attr->sl = rdma_ah_get_sl(rdma_attr);
1825 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr);
1826 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr);
1827 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) &
1828 IB_AH_GRH);
1829 if (uverb_attr->is_global) {
1830 grh = rdma_ah_read_grh(rdma_attr);
1831 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1832 uverb_attr->flow_label = grh->flow_label;
1833 uverb_attr->sgid_index = grh->sgid_index;
1834 uverb_attr->hop_limit = grh->hop_limit;
1835 uverb_attr->traffic_class = grh->traffic_class;
1836 }
1837 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr);
1838 }
1839
1840 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1841 struct ib_device *ib_dev,
1842 const char __user *buf, int in_len,
1843 int out_len)
1844 {
1845 struct ib_uverbs_query_qp cmd;
1846 struct ib_uverbs_query_qp_resp resp;
1847 struct ib_qp *qp;
1848 struct ib_qp_attr *attr;
1849 struct ib_qp_init_attr *init_attr;
1850 int ret;
1851
1852 if (copy_from_user(&cmd, buf, sizeof cmd))
1853 return -EFAULT;
1854
1855 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1856 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1857 if (!attr || !init_attr) {
1858 ret = -ENOMEM;
1859 goto out;
1860 }
1861
1862 qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
1863 if (!qp) {
1864 ret = -EINVAL;
1865 goto out;
1866 }
1867
1868 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1869
1870 uobj_put_obj_read(qp);
1871
1872 if (ret)
1873 goto out;
1874
1875 memset(&resp, 0, sizeof resp);
1876
1877 resp.qp_state = attr->qp_state;
1878 resp.cur_qp_state = attr->cur_qp_state;
1879 resp.path_mtu = attr->path_mtu;
1880 resp.path_mig_state = attr->path_mig_state;
1881 resp.qkey = attr->qkey;
1882 resp.rq_psn = attr->rq_psn;
1883 resp.sq_psn = attr->sq_psn;
1884 resp.dest_qp_num = attr->dest_qp_num;
1885 resp.qp_access_flags = attr->qp_access_flags;
1886 resp.pkey_index = attr->pkey_index;
1887 resp.alt_pkey_index = attr->alt_pkey_index;
1888 resp.sq_draining = attr->sq_draining;
1889 resp.max_rd_atomic = attr->max_rd_atomic;
1890 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1891 resp.min_rnr_timer = attr->min_rnr_timer;
1892 resp.port_num = attr->port_num;
1893 resp.timeout = attr->timeout;
1894 resp.retry_cnt = attr->retry_cnt;
1895 resp.rnr_retry = attr->rnr_retry;
1896 resp.alt_port_num = attr->alt_port_num;
1897 resp.alt_timeout = attr->alt_timeout;
1898
1899 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1900 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1901
1902 resp.max_send_wr = init_attr->cap.max_send_wr;
1903 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1904 resp.max_send_sge = init_attr->cap.max_send_sge;
1905 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1906 resp.max_inline_data = init_attr->cap.max_inline_data;
1907 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1908
1909 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1910 ret = -EFAULT;
1911
1912 out:
1913 kfree(attr);
1914 kfree(init_attr);
1915
1916 return ret ? ret : in_len;
1917 }
1918
1919 /* Remove ignored fields set in the attribute mask */
1920 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1921 {
1922 switch (qp_type) {
1923 case IB_QPT_XRC_INI:
1924 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1925 case IB_QPT_XRC_TGT:
1926 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1927 IB_QP_RNR_RETRY);
1928 default:
1929 return mask;
1930 }
1931 }
1932
1933 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1934 struct rdma_ah_attr *rdma_attr,
1935 struct ib_uverbs_qp_dest *uverb_attr)
1936 {
1937 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1938 if (uverb_attr->is_global) {
1939 rdma_ah_set_grh(rdma_attr, NULL,
1940 uverb_attr->flow_label,
1941 uverb_attr->sgid_index,
1942 uverb_attr->hop_limit,
1943 uverb_attr->traffic_class);
1944 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1945 } else {
1946 rdma_ah_set_ah_flags(rdma_attr, 0);
1947 }
1948 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1949 rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1950 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1951 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1952 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1953 rdma_ah_set_make_grd(rdma_attr, false);
1954 }
1955
1956 static int modify_qp(struct ib_uverbs_file *file,
1957 struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
1958 {
1959 struct ib_qp_attr *attr;
1960 struct ib_qp *qp;
1961 int ret;
1962
1963 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1964 if (!attr)
1965 return -ENOMEM;
1966
1967 qp = uobj_get_obj_read(qp, cmd->base.qp_handle, file->ucontext);
1968 if (!qp) {
1969 ret = -EINVAL;
1970 goto out;
1971 }
1972
1973 if ((cmd->base.attr_mask & IB_QP_PORT) &&
1974 !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1975 ret = -EINVAL;
1976 goto release_qp;
1977 }
1978
1979 if ((cmd->base.attr_mask & IB_QP_AV) &&
1980 !rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1981 ret = -EINVAL;
1982 goto release_qp;
1983 }
1984
1985 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1986 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1987 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num))) {
1988 ret = -EINVAL;
1989 goto release_qp;
1990 }
1991
1992 attr->qp_state = cmd->base.qp_state;
1993 attr->cur_qp_state = cmd->base.cur_qp_state;
1994 attr->path_mtu = cmd->base.path_mtu;
1995 attr->path_mig_state = cmd->base.path_mig_state;
1996 attr->qkey = cmd->base.qkey;
1997 attr->rq_psn = cmd->base.rq_psn;
1998 attr->sq_psn = cmd->base.sq_psn;
1999 attr->dest_qp_num = cmd->base.dest_qp_num;
2000 attr->qp_access_flags = cmd->base.qp_access_flags;
2001 attr->pkey_index = cmd->base.pkey_index;
2002 attr->alt_pkey_index = cmd->base.alt_pkey_index;
2003 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
2004 attr->max_rd_atomic = cmd->base.max_rd_atomic;
2005 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
2006 attr->min_rnr_timer = cmd->base.min_rnr_timer;
2007 attr->port_num = cmd->base.port_num;
2008 attr->timeout = cmd->base.timeout;
2009 attr->retry_cnt = cmd->base.retry_cnt;
2010 attr->rnr_retry = cmd->base.rnr_retry;
2011 attr->alt_port_num = cmd->base.alt_port_num;
2012 attr->alt_timeout = cmd->base.alt_timeout;
2013 attr->rate_limit = cmd->rate_limit;
2014
2015 if (cmd->base.attr_mask & IB_QP_AV)
2016 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
2017 &cmd->base.dest);
2018
2019 if (cmd->base.attr_mask & IB_QP_ALT_PATH)
2020 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
2021 &cmd->base.alt_dest);
2022
2023 ret = ib_modify_qp_with_udata(qp, attr,
2024 modify_qp_mask(qp->qp_type,
2025 cmd->base.attr_mask),
2026 udata);
2027
2028 release_qp:
2029 uobj_put_obj_read(qp);
2030 out:
2031 kfree(attr);
2032
2033 return ret;
2034 }
2035
2036 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2037 struct ib_device *ib_dev,
2038 const char __user *buf, int in_len,
2039 int out_len)
2040 {
2041 struct ib_uverbs_ex_modify_qp cmd = {};
2042 struct ib_udata udata;
2043 int ret;
2044
2045 if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2046 return -EFAULT;
2047
2048 if (cmd.base.attr_mask &
2049 ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2050 return -EOPNOTSUPP;
2051
2052 ib_uverbs_init_udata(&udata, buf + sizeof(cmd.base), NULL,
2053 in_len - sizeof(cmd.base) - sizeof(struct ib_uverbs_cmd_hdr),
2054 out_len);
2055
2056 ret = modify_qp(file, &cmd, &udata);
2057 if (ret)
2058 return ret;
2059
2060 return in_len;
2061 }
2062
2063 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2064 struct ib_device *ib_dev,
2065 struct ib_udata *ucore,
2066 struct ib_udata *uhw)
2067 {
2068 struct ib_uverbs_ex_modify_qp cmd = {};
2069 int ret;
2070
2071 /*
2072 * Last bit is reserved for extending the attr_mask by
2073 * using another field.
2074 */
2075 BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2076
2077 if (ucore->inlen < sizeof(cmd.base))
2078 return -EINVAL;
2079
2080 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2081 if (ret)
2082 return ret;
2083
2084 if (cmd.base.attr_mask &
2085 ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2086 return -EOPNOTSUPP;
2087
2088 if (ucore->inlen > sizeof(cmd)) {
2089 if (!ib_is_udata_cleared(ucore, sizeof(cmd),
2090 ucore->inlen - sizeof(cmd)))
2091 return -EOPNOTSUPP;
2092 }
2093
2094 ret = modify_qp(file, &cmd, uhw);
2095
2096 return ret;
2097 }
2098
2099 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2100 struct ib_device *ib_dev,
2101 const char __user *buf, int in_len,
2102 int out_len)
2103 {
2104 struct ib_uverbs_destroy_qp cmd;
2105 struct ib_uverbs_destroy_qp_resp resp;
2106 struct ib_uobject *uobj;
2107 struct ib_uqp_object *obj;
2108 int ret = -EINVAL;
2109
2110 if (copy_from_user(&cmd, buf, sizeof cmd))
2111 return -EFAULT;
2112
2113 memset(&resp, 0, sizeof resp);
2114
2115 uobj = uobj_get_write(uobj_get_type(qp), cmd.qp_handle,
2116 file->ucontext);
2117 if (IS_ERR(uobj))
2118 return PTR_ERR(uobj);
2119
2120 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2121 /*
2122 * Make sure we don't free the memory in remove_commit as we still
2123 * needs the uobject memory to create the response.
2124 */
2125 uverbs_uobject_get(uobj);
2126
2127 ret = uobj_remove_commit(uobj);
2128 if (ret) {
2129 uverbs_uobject_put(uobj);
2130 return ret;
2131 }
2132
2133 resp.events_reported = obj->uevent.events_reported;
2134 uverbs_uobject_put(uobj);
2135
2136 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2137 return -EFAULT;
2138
2139 return in_len;
2140 }
2141
2142 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2143 {
2144 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2145 sizeof (struct ib_sge))
2146 return NULL;
2147
2148 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2149 num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2150 }
2151
2152 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2153 struct ib_device *ib_dev,
2154 const char __user *buf, int in_len,
2155 int out_len)
2156 {
2157 struct ib_uverbs_post_send cmd;
2158 struct ib_uverbs_post_send_resp resp;
2159 struct ib_uverbs_send_wr *user_wr;
2160 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
2161 struct ib_qp *qp;
2162 int i, sg_ind;
2163 int is_ud;
2164 ssize_t ret = -EINVAL;
2165 size_t next_size;
2166
2167 if (copy_from_user(&cmd, buf, sizeof cmd))
2168 return -EFAULT;
2169
2170 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2171 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2172 return -EINVAL;
2173
2174 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2175 return -EINVAL;
2176
2177 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2178 if (!user_wr)
2179 return -ENOMEM;
2180
2181 qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2182 if (!qp)
2183 goto out;
2184
2185 is_ud = qp->qp_type == IB_QPT_UD;
2186 sg_ind = 0;
2187 last = NULL;
2188 for (i = 0; i < cmd.wr_count; ++i) {
2189 if (copy_from_user(user_wr,
2190 buf + sizeof cmd + i * cmd.wqe_size,
2191 cmd.wqe_size)) {
2192 ret = -EFAULT;
2193 goto out_put;
2194 }
2195
2196 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2197 ret = -EINVAL;
2198 goto out_put;
2199 }
2200
2201 if (is_ud) {
2202 struct ib_ud_wr *ud;
2203
2204 if (user_wr->opcode != IB_WR_SEND &&
2205 user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2206 ret = -EINVAL;
2207 goto out_put;
2208 }
2209
2210 next_size = sizeof(*ud);
2211 ud = alloc_wr(next_size, user_wr->num_sge);
2212 if (!ud) {
2213 ret = -ENOMEM;
2214 goto out_put;
2215 }
2216
2217 ud->ah = uobj_get_obj_read(ah, user_wr->wr.ud.ah,
2218 file->ucontext);
2219 if (!ud->ah) {
2220 kfree(ud);
2221 ret = -EINVAL;
2222 goto out_put;
2223 }
2224 ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2225 ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2226
2227 next = &ud->wr;
2228 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2229 user_wr->opcode == IB_WR_RDMA_WRITE ||
2230 user_wr->opcode == IB_WR_RDMA_READ) {
2231 struct ib_rdma_wr *rdma;
2232
2233 next_size = sizeof(*rdma);
2234 rdma = alloc_wr(next_size, user_wr->num_sge);
2235 if (!rdma) {
2236 ret = -ENOMEM;
2237 goto out_put;
2238 }
2239
2240 rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2241 rdma->rkey = user_wr->wr.rdma.rkey;
2242
2243 next = &rdma->wr;
2244 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2245 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2246 struct ib_atomic_wr *atomic;
2247
2248 next_size = sizeof(*atomic);
2249 atomic = alloc_wr(next_size, user_wr->num_sge);
2250 if (!atomic) {
2251 ret = -ENOMEM;
2252 goto out_put;
2253 }
2254
2255 atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2256 atomic->compare_add = user_wr->wr.atomic.compare_add;
2257 atomic->swap = user_wr->wr.atomic.swap;
2258 atomic->rkey = user_wr->wr.atomic.rkey;
2259
2260 next = &atomic->wr;
2261 } else if (user_wr->opcode == IB_WR_SEND ||
2262 user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2263 user_wr->opcode == IB_WR_SEND_WITH_INV) {
2264 next_size = sizeof(*next);
2265 next = alloc_wr(next_size, user_wr->num_sge);
2266 if (!next) {
2267 ret = -ENOMEM;
2268 goto out_put;
2269 }
2270 } else {
2271 ret = -EINVAL;
2272 goto out_put;
2273 }
2274
2275 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2276 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2277 next->ex.imm_data =
2278 (__be32 __force) user_wr->ex.imm_data;
2279 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2280 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2281 }
2282
2283 if (!last)
2284 wr = next;
2285 else
2286 last->next = next;
2287 last = next;
2288
2289 next->next = NULL;
2290 next->wr_id = user_wr->wr_id;
2291 next->num_sge = user_wr->num_sge;
2292 next->opcode = user_wr->opcode;
2293 next->send_flags = user_wr->send_flags;
2294
2295 if (next->num_sge) {
2296 next->sg_list = (void *) next +
2297 ALIGN(next_size, sizeof(struct ib_sge));
2298 if (copy_from_user(next->sg_list,
2299 buf + sizeof cmd +
2300 cmd.wr_count * cmd.wqe_size +
2301 sg_ind * sizeof (struct ib_sge),
2302 next->num_sge * sizeof (struct ib_sge))) {
2303 ret = -EFAULT;
2304 goto out_put;
2305 }
2306 sg_ind += next->num_sge;
2307 } else
2308 next->sg_list = NULL;
2309 }
2310
2311 resp.bad_wr = 0;
2312 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2313 if (ret)
2314 for (next = wr; next; next = next->next) {
2315 ++resp.bad_wr;
2316 if (next == bad_wr)
2317 break;
2318 }
2319
2320 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2321 ret = -EFAULT;
2322
2323 out_put:
2324 uobj_put_obj_read(qp);
2325
2326 while (wr) {
2327 if (is_ud && ud_wr(wr)->ah)
2328 uobj_put_obj_read(ud_wr(wr)->ah);
2329 next = wr->next;
2330 kfree(wr);
2331 wr = next;
2332 }
2333
2334 out:
2335 kfree(user_wr);
2336
2337 return ret ? ret : in_len;
2338 }
2339
2340 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2341 int in_len,
2342 u32 wr_count,
2343 u32 sge_count,
2344 u32 wqe_size)
2345 {
2346 struct ib_uverbs_recv_wr *user_wr;
2347 struct ib_recv_wr *wr = NULL, *last, *next;
2348 int sg_ind;
2349 int i;
2350 int ret;
2351
2352 if (in_len < wqe_size * wr_count +
2353 sge_count * sizeof (struct ib_uverbs_sge))
2354 return ERR_PTR(-EINVAL);
2355
2356 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2357 return ERR_PTR(-EINVAL);
2358
2359 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2360 if (!user_wr)
2361 return ERR_PTR(-ENOMEM);
2362
2363 sg_ind = 0;
2364 last = NULL;
2365 for (i = 0; i < wr_count; ++i) {
2366 if (copy_from_user(user_wr, buf + i * wqe_size,
2367 wqe_size)) {
2368 ret = -EFAULT;
2369 goto err;
2370 }
2371
2372 if (user_wr->num_sge + sg_ind > sge_count) {
2373 ret = -EINVAL;
2374 goto err;
2375 }
2376
2377 if (user_wr->num_sge >=
2378 (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2379 sizeof (struct ib_sge)) {
2380 ret = -EINVAL;
2381 goto err;
2382 }
2383
2384 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2385 user_wr->num_sge * sizeof (struct ib_sge),
2386 GFP_KERNEL);
2387 if (!next) {
2388 ret = -ENOMEM;
2389 goto err;
2390 }
2391
2392 if (!last)
2393 wr = next;
2394 else
2395 last->next = next;
2396 last = next;
2397
2398 next->next = NULL;
2399 next->wr_id = user_wr->wr_id;
2400 next->num_sge = user_wr->num_sge;
2401
2402 if (next->num_sge) {
2403 next->sg_list = (void *) next +
2404 ALIGN(sizeof *next, sizeof (struct ib_sge));
2405 if (copy_from_user(next->sg_list,
2406 buf + wr_count * wqe_size +
2407 sg_ind * sizeof (struct ib_sge),
2408 next->num_sge * sizeof (struct ib_sge))) {
2409 ret = -EFAULT;
2410 goto err;
2411 }
2412 sg_ind += next->num_sge;
2413 } else
2414 next->sg_list = NULL;
2415 }
2416
2417 kfree(user_wr);
2418 return wr;
2419
2420 err:
2421 kfree(user_wr);
2422
2423 while (wr) {
2424 next = wr->next;
2425 kfree(wr);
2426 wr = next;
2427 }
2428
2429 return ERR_PTR(ret);
2430 }
2431
2432 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2433 struct ib_device *ib_dev,
2434 const char __user *buf, int in_len,
2435 int out_len)
2436 {
2437 struct ib_uverbs_post_recv cmd;
2438 struct ib_uverbs_post_recv_resp resp;
2439 struct ib_recv_wr *wr, *next, *bad_wr;
2440 struct ib_qp *qp;
2441 ssize_t ret = -EINVAL;
2442
2443 if (copy_from_user(&cmd, buf, sizeof cmd))
2444 return -EFAULT;
2445
2446 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2447 in_len - sizeof cmd, cmd.wr_count,
2448 cmd.sge_count, cmd.wqe_size);
2449 if (IS_ERR(wr))
2450 return PTR_ERR(wr);
2451
2452 qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2453 if (!qp)
2454 goto out;
2455
2456 resp.bad_wr = 0;
2457 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2458
2459 uobj_put_obj_read(qp);
2460 if (ret) {
2461 for (next = wr; next; next = next->next) {
2462 ++resp.bad_wr;
2463 if (next == bad_wr)
2464 break;
2465 }
2466 }
2467
2468 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2469 ret = -EFAULT;
2470
2471 out:
2472 while (wr) {
2473 next = wr->next;
2474 kfree(wr);
2475 wr = next;
2476 }
2477
2478 return ret ? ret : in_len;
2479 }
2480
2481 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2482 struct ib_device *ib_dev,
2483 const char __user *buf, int in_len,
2484 int out_len)
2485 {
2486 struct ib_uverbs_post_srq_recv cmd;
2487 struct ib_uverbs_post_srq_recv_resp resp;
2488 struct ib_recv_wr *wr, *next, *bad_wr;
2489 struct ib_srq *srq;
2490 ssize_t ret = -EINVAL;
2491
2492 if (copy_from_user(&cmd, buf, sizeof cmd))
2493 return -EFAULT;
2494
2495 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2496 in_len - sizeof cmd, cmd.wr_count,
2497 cmd.sge_count, cmd.wqe_size);
2498 if (IS_ERR(wr))
2499 return PTR_ERR(wr);
2500
2501 srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
2502 if (!srq)
2503 goto out;
2504
2505 resp.bad_wr = 0;
2506 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2507
2508 uobj_put_obj_read(srq);
2509
2510 if (ret)
2511 for (next = wr; next; next = next->next) {
2512 ++resp.bad_wr;
2513 if (next == bad_wr)
2514 break;
2515 }
2516
2517 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2518 ret = -EFAULT;
2519
2520 out:
2521 while (wr) {
2522 next = wr->next;
2523 kfree(wr);
2524 wr = next;
2525 }
2526
2527 return ret ? ret : in_len;
2528 }
2529
2530 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2531 struct ib_device *ib_dev,
2532 const char __user *buf, int in_len,
2533 int out_len)
2534 {
2535 struct ib_uverbs_create_ah cmd;
2536 struct ib_uverbs_create_ah_resp resp;
2537 struct ib_uobject *uobj;
2538 struct ib_pd *pd;
2539 struct ib_ah *ah;
2540 struct rdma_ah_attr attr;
2541 int ret;
2542 struct ib_udata udata;
2543
2544 if (out_len < sizeof resp)
2545 return -ENOSPC;
2546
2547 if (copy_from_user(&cmd, buf, sizeof cmd))
2548 return -EFAULT;
2549
2550 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num))
2551 return -EINVAL;
2552
2553 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
2554 u64_to_user_ptr(cmd.response) + sizeof(resp),
2555 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
2556 out_len - sizeof(resp));
2557
2558 uobj = uobj_alloc(uobj_get_type(ah), file->ucontext);
2559 if (IS_ERR(uobj))
2560 return PTR_ERR(uobj);
2561
2562 pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2563 if (!pd) {
2564 ret = -EINVAL;
2565 goto err;
2566 }
2567
2568 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2569 rdma_ah_set_make_grd(&attr, false);
2570 rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2571 rdma_ah_set_sl(&attr, cmd.attr.sl);
2572 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2573 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2574 rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2575
2576 if (cmd.attr.is_global) {
2577 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2578 cmd.attr.grh.sgid_index,
2579 cmd.attr.grh.hop_limit,
2580 cmd.attr.grh.traffic_class);
2581 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2582 } else {
2583 rdma_ah_set_ah_flags(&attr, 0);
2584 }
2585
2586 ah = rdma_create_user_ah(pd, &attr, &udata);
2587 if (IS_ERR(ah)) {
2588 ret = PTR_ERR(ah);
2589 goto err_put;
2590 }
2591
2592 ah->uobject = uobj;
2593 uobj->user_handle = cmd.user_handle;
2594 uobj->object = ah;
2595
2596 resp.ah_handle = uobj->id;
2597
2598 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
2599 ret = -EFAULT;
2600 goto err_copy;
2601 }
2602
2603 uobj_put_obj_read(pd);
2604 uobj_alloc_commit(uobj);
2605
2606 return in_len;
2607
2608 err_copy:
2609 rdma_destroy_ah(ah);
2610
2611 err_put:
2612 uobj_put_obj_read(pd);
2613
2614 err:
2615 uobj_alloc_abort(uobj);
2616 return ret;
2617 }
2618
2619 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2620 struct ib_device *ib_dev,
2621 const char __user *buf, int in_len, int out_len)
2622 {
2623 struct ib_uverbs_destroy_ah cmd;
2624 struct ib_uobject *uobj;
2625 int ret;
2626
2627 if (copy_from_user(&cmd, buf, sizeof cmd))
2628 return -EFAULT;
2629
2630 uobj = uobj_get_write(uobj_get_type(ah), cmd.ah_handle,
2631 file->ucontext);
2632 if (IS_ERR(uobj))
2633 return PTR_ERR(uobj);
2634
2635 ret = uobj_remove_commit(uobj);
2636 return ret ?: in_len;
2637 }
2638
2639 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2640 struct ib_device *ib_dev,
2641 const char __user *buf, int in_len,
2642 int out_len)
2643 {
2644 struct ib_uverbs_attach_mcast cmd;
2645 struct ib_qp *qp;
2646 struct ib_uqp_object *obj;
2647 struct ib_uverbs_mcast_entry *mcast;
2648 int ret;
2649
2650 if (copy_from_user(&cmd, buf, sizeof cmd))
2651 return -EFAULT;
2652
2653 qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2654 if (!qp)
2655 return -EINVAL;
2656
2657 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2658
2659 mutex_lock(&obj->mcast_lock);
2660 list_for_each_entry(mcast, &obj->mcast_list, list)
2661 if (cmd.mlid == mcast->lid &&
2662 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2663 ret = 0;
2664 goto out_put;
2665 }
2666
2667 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2668 if (!mcast) {
2669 ret = -ENOMEM;
2670 goto out_put;
2671 }
2672
2673 mcast->lid = cmd.mlid;
2674 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2675
2676 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2677 if (!ret)
2678 list_add_tail(&mcast->list, &obj->mcast_list);
2679 else
2680 kfree(mcast);
2681
2682 out_put:
2683 mutex_unlock(&obj->mcast_lock);
2684 uobj_put_obj_read(qp);
2685
2686 return ret ? ret : in_len;
2687 }
2688
2689 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2690 struct ib_device *ib_dev,
2691 const char __user *buf, int in_len,
2692 int out_len)
2693 {
2694 struct ib_uverbs_detach_mcast cmd;
2695 struct ib_uqp_object *obj;
2696 struct ib_qp *qp;
2697 struct ib_uverbs_mcast_entry *mcast;
2698 int ret = -EINVAL;
2699 bool found = false;
2700
2701 if (copy_from_user(&cmd, buf, sizeof cmd))
2702 return -EFAULT;
2703
2704 qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2705 if (!qp)
2706 return -EINVAL;
2707
2708 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2709 mutex_lock(&obj->mcast_lock);
2710
2711 list_for_each_entry(mcast, &obj->mcast_list, list)
2712 if (cmd.mlid == mcast->lid &&
2713 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2714 list_del(&mcast->list);
2715 kfree(mcast);
2716 found = true;
2717 break;
2718 }
2719
2720 if (!found) {
2721 ret = -EINVAL;
2722 goto out_put;
2723 }
2724
2725 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2726
2727 out_put:
2728 mutex_unlock(&obj->mcast_lock);
2729 uobj_put_obj_read(qp);
2730 return ret ? ret : in_len;
2731 }
2732
2733 static int kern_spec_to_ib_spec_action(struct ib_uverbs_flow_spec *kern_spec,
2734 union ib_flow_spec *ib_spec)
2735 {
2736 ib_spec->type = kern_spec->type;
2737 switch (ib_spec->type) {
2738 case IB_FLOW_SPEC_ACTION_TAG:
2739 if (kern_spec->flow_tag.size !=
2740 sizeof(struct ib_uverbs_flow_spec_action_tag))
2741 return -EINVAL;
2742
2743 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2744 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2745 break;
2746 case IB_FLOW_SPEC_ACTION_DROP:
2747 if (kern_spec->drop.size !=
2748 sizeof(struct ib_uverbs_flow_spec_action_drop))
2749 return -EINVAL;
2750
2751 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2752 break;
2753 default:
2754 return -EINVAL;
2755 }
2756 return 0;
2757 }
2758
2759 static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
2760 {
2761 /* Returns user space filter size, includes padding */
2762 return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2763 }
2764
2765 static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
2766 u16 ib_real_filter_sz)
2767 {
2768 /*
2769 * User space filter structures must be 64 bit aligned, otherwise this
2770 * may pass, but we won't handle additional new attributes.
2771 */
2772
2773 if (kern_filter_size > ib_real_filter_sz) {
2774 if (memchr_inv(kern_spec_filter +
2775 ib_real_filter_sz, 0,
2776 kern_filter_size - ib_real_filter_sz))
2777 return -EINVAL;
2778 return ib_real_filter_sz;
2779 }
2780 return kern_filter_size;
2781 }
2782
2783 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2784 union ib_flow_spec *ib_spec)
2785 {
2786 ssize_t actual_filter_sz;
2787 ssize_t kern_filter_sz;
2788 ssize_t ib_filter_sz;
2789 void *kern_spec_mask;
2790 void *kern_spec_val;
2791
2792 if (kern_spec->reserved)
2793 return -EINVAL;
2794
2795 ib_spec->type = kern_spec->type;
2796
2797 kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2798 /* User flow spec size must be aligned to 4 bytes */
2799 if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2800 return -EINVAL;
2801
2802 kern_spec_val = (void *)kern_spec +
2803 sizeof(struct ib_uverbs_flow_spec_hdr);
2804 kern_spec_mask = kern_spec_val + kern_filter_sz;
2805 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2806 return -EINVAL;
2807
2808 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2809 case IB_FLOW_SPEC_ETH:
2810 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2811 actual_filter_sz = spec_filter_size(kern_spec_mask,
2812 kern_filter_sz,
2813 ib_filter_sz);
2814 if (actual_filter_sz <= 0)
2815 return -EINVAL;
2816 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2817 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2818 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2819 break;
2820 case IB_FLOW_SPEC_IPV4:
2821 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2822 actual_filter_sz = spec_filter_size(kern_spec_mask,
2823 kern_filter_sz,
2824 ib_filter_sz);
2825 if (actual_filter_sz <= 0)
2826 return -EINVAL;
2827 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2828 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2829 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2830 break;
2831 case IB_FLOW_SPEC_IPV6:
2832 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2833 actual_filter_sz = spec_filter_size(kern_spec_mask,
2834 kern_filter_sz,
2835 ib_filter_sz);
2836 if (actual_filter_sz <= 0)
2837 return -EINVAL;
2838 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2839 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2840 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2841
2842 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2843 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2844 return -EINVAL;
2845 break;
2846 case IB_FLOW_SPEC_TCP:
2847 case IB_FLOW_SPEC_UDP:
2848 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2849 actual_filter_sz = spec_filter_size(kern_spec_mask,
2850 kern_filter_sz,
2851 ib_filter_sz);
2852 if (actual_filter_sz <= 0)
2853 return -EINVAL;
2854 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2855 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2856 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2857 break;
2858 case IB_FLOW_SPEC_VXLAN_TUNNEL:
2859 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2860 actual_filter_sz = spec_filter_size(kern_spec_mask,
2861 kern_filter_sz,
2862 ib_filter_sz);
2863 if (actual_filter_sz <= 0)
2864 return -EINVAL;
2865 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2866 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2867 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2868
2869 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2870 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2871 return -EINVAL;
2872 break;
2873 default:
2874 return -EINVAL;
2875 }
2876 return 0;
2877 }
2878
2879 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2880 union ib_flow_spec *ib_spec)
2881 {
2882 if (kern_spec->reserved)
2883 return -EINVAL;
2884
2885 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2886 return kern_spec_to_ib_spec_action(kern_spec, ib_spec);
2887 else
2888 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2889 }
2890
2891 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
2892 struct ib_device *ib_dev,
2893 struct ib_udata *ucore,
2894 struct ib_udata *uhw)
2895 {
2896 struct ib_uverbs_ex_create_wq cmd = {};
2897 struct ib_uverbs_ex_create_wq_resp resp = {};
2898 struct ib_uwq_object *obj;
2899 int err = 0;
2900 struct ib_cq *cq;
2901 struct ib_pd *pd;
2902 struct ib_wq *wq;
2903 struct ib_wq_init_attr wq_init_attr = {};
2904 size_t required_cmd_sz;
2905 size_t required_resp_len;
2906
2907 required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
2908 required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
2909
2910 if (ucore->inlen < required_cmd_sz)
2911 return -EINVAL;
2912
2913 if (ucore->outlen < required_resp_len)
2914 return -ENOSPC;
2915
2916 if (ucore->inlen > sizeof(cmd) &&
2917 !ib_is_udata_cleared(ucore, sizeof(cmd),
2918 ucore->inlen - sizeof(cmd)))
2919 return -EOPNOTSUPP;
2920
2921 err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2922 if (err)
2923 return err;
2924
2925 if (cmd.comp_mask)
2926 return -EOPNOTSUPP;
2927
2928 obj = (struct ib_uwq_object *)uobj_alloc(uobj_get_type(wq),
2929 file->ucontext);
2930 if (IS_ERR(obj))
2931 return PTR_ERR(obj);
2932
2933 pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2934 if (!pd) {
2935 err = -EINVAL;
2936 goto err_uobj;
2937 }
2938
2939 cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
2940 if (!cq) {
2941 err = -EINVAL;
2942 goto err_put_pd;
2943 }
2944
2945 wq_init_attr.cq = cq;
2946 wq_init_attr.max_sge = cmd.max_sge;
2947 wq_init_attr.max_wr = cmd.max_wr;
2948 wq_init_attr.wq_context = file;
2949 wq_init_attr.wq_type = cmd.wq_type;
2950 wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2951 if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
2952 sizeof(cmd.create_flags)))
2953 wq_init_attr.create_flags = cmd.create_flags;
2954 obj->uevent.events_reported = 0;
2955 INIT_LIST_HEAD(&obj->uevent.event_list);
2956
2957 if (!pd->device->create_wq) {
2958 err = -EOPNOTSUPP;
2959 goto err_put_cq;
2960 }
2961 wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
2962 if (IS_ERR(wq)) {
2963 err = PTR_ERR(wq);
2964 goto err_put_cq;
2965 }
2966
2967 wq->uobject = &obj->uevent.uobject;
2968 obj->uevent.uobject.object = wq;
2969 wq->wq_type = wq_init_attr.wq_type;
2970 wq->cq = cq;
2971 wq->pd = pd;
2972 wq->device = pd->device;
2973 wq->wq_context = wq_init_attr.wq_context;
2974 atomic_set(&wq->usecnt, 0);
2975 atomic_inc(&pd->usecnt);
2976 atomic_inc(&cq->usecnt);
2977 wq->uobject = &obj->uevent.uobject;
2978 obj->uevent.uobject.object = wq;
2979
2980 memset(&resp, 0, sizeof(resp));
2981 resp.wq_handle = obj->uevent.uobject.id;
2982 resp.max_sge = wq_init_attr.max_sge;
2983 resp.max_wr = wq_init_attr.max_wr;
2984 resp.wqn = wq->wq_num;
2985 resp.response_length = required_resp_len;
2986 err = ib_copy_to_udata(ucore,
2987 &resp, resp.response_length);
2988 if (err)
2989 goto err_copy;
2990
2991 uobj_put_obj_read(pd);
2992 uobj_put_obj_read(cq);
2993 uobj_alloc_commit(&obj->uevent.uobject);
2994 return 0;
2995
2996 err_copy:
2997 ib_destroy_wq(wq);
2998 err_put_cq:
2999 uobj_put_obj_read(cq);
3000 err_put_pd:
3001 uobj_put_obj_read(pd);
3002 err_uobj:
3003 uobj_alloc_abort(&obj->uevent.uobject);
3004
3005 return err;
3006 }
3007
3008 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
3009 struct ib_device *ib_dev,
3010 struct ib_udata *ucore,
3011 struct ib_udata *uhw)
3012 {
3013 struct ib_uverbs_ex_destroy_wq cmd = {};
3014 struct ib_uverbs_ex_destroy_wq_resp resp = {};
3015 struct ib_uobject *uobj;
3016 struct ib_uwq_object *obj;
3017 size_t required_cmd_sz;
3018 size_t required_resp_len;
3019 int ret;
3020
3021 required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3022 required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3023
3024 if (ucore->inlen < required_cmd_sz)
3025 return -EINVAL;
3026
3027 if (ucore->outlen < required_resp_len)
3028 return -ENOSPC;
3029
3030 if (ucore->inlen > sizeof(cmd) &&
3031 !ib_is_udata_cleared(ucore, sizeof(cmd),
3032 ucore->inlen - sizeof(cmd)))
3033 return -EOPNOTSUPP;
3034
3035 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3036 if (ret)
3037 return ret;
3038
3039 if (cmd.comp_mask)
3040 return -EOPNOTSUPP;
3041
3042 resp.response_length = required_resp_len;
3043 uobj = uobj_get_write(uobj_get_type(wq), cmd.wq_handle,
3044 file->ucontext);
3045 if (IS_ERR(uobj))
3046 return PTR_ERR(uobj);
3047
3048 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3049 /*
3050 * Make sure we don't free the memory in remove_commit as we still
3051 * needs the uobject memory to create the response.
3052 */
3053 uverbs_uobject_get(uobj);
3054
3055 ret = uobj_remove_commit(uobj);
3056 resp.events_reported = obj->uevent.events_reported;
3057 uverbs_uobject_put(uobj);
3058 if (ret)
3059 return ret;
3060
3061 return ib_copy_to_udata(ucore, &resp, resp.response_length);
3062 }
3063
3064 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3065 struct ib_device *ib_dev,
3066 struct ib_udata *ucore,
3067 struct ib_udata *uhw)
3068 {
3069 struct ib_uverbs_ex_modify_wq cmd = {};
3070 struct ib_wq *wq;
3071 struct ib_wq_attr wq_attr = {};
3072 size_t required_cmd_sz;
3073 int ret;
3074
3075 required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3076 if (ucore->inlen < required_cmd_sz)
3077 return -EINVAL;
3078
3079 if (ucore->inlen > sizeof(cmd) &&
3080 !ib_is_udata_cleared(ucore, sizeof(cmd),
3081 ucore->inlen - sizeof(cmd)))
3082 return -EOPNOTSUPP;
3083
3084 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3085 if (ret)
3086 return ret;
3087
3088 if (!cmd.attr_mask)
3089 return -EINVAL;
3090
3091 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3092 return -EINVAL;
3093
3094 wq = uobj_get_obj_read(wq, cmd.wq_handle, file->ucontext);
3095 if (!wq)
3096 return -EINVAL;
3097
3098 wq_attr.curr_wq_state = cmd.curr_wq_state;
3099 wq_attr.wq_state = cmd.wq_state;
3100 if (cmd.attr_mask & IB_WQ_FLAGS) {
3101 wq_attr.flags = cmd.flags;
3102 wq_attr.flags_mask = cmd.flags_mask;
3103 }
3104 if (!wq->device->modify_wq) {
3105 ret = -EOPNOTSUPP;
3106 goto out;
3107 }
3108 ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3109 out:
3110 uobj_put_obj_read(wq);
3111 return ret;
3112 }
3113
3114 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3115 struct ib_device *ib_dev,
3116 struct ib_udata *ucore,
3117 struct ib_udata *uhw)
3118 {
3119 struct ib_uverbs_ex_create_rwq_ind_table cmd = {};
3120 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {};
3121 struct ib_uobject *uobj;
3122 int err = 0;
3123 struct ib_rwq_ind_table_init_attr init_attr = {};
3124 struct ib_rwq_ind_table *rwq_ind_tbl;
3125 struct ib_wq **wqs = NULL;
3126 u32 *wqs_handles = NULL;
3127 struct ib_wq *wq = NULL;
3128 int i, j, num_read_wqs;
3129 u32 num_wq_handles;
3130 u32 expected_in_size;
3131 size_t required_cmd_sz_header;
3132 size_t required_resp_len;
3133
3134 required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3135 required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3136
3137 if (ucore->inlen < required_cmd_sz_header)
3138 return -EINVAL;
3139
3140 if (ucore->outlen < required_resp_len)
3141 return -ENOSPC;
3142
3143 err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3144 if (err)
3145 return err;
3146
3147 ucore->inbuf += required_cmd_sz_header;
3148 ucore->inlen -= required_cmd_sz_header;
3149
3150 if (cmd.comp_mask)
3151 return -EOPNOTSUPP;
3152
3153 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3154 return -EINVAL;
3155
3156 num_wq_handles = 1 << cmd.log_ind_tbl_size;
3157 expected_in_size = num_wq_handles * sizeof(__u32);
3158 if (num_wq_handles == 1)
3159 /* input size for wq handles is u64 aligned */
3160 expected_in_size += sizeof(__u32);
3161
3162 if (ucore->inlen < expected_in_size)
3163 return -EINVAL;
3164
3165 if (ucore->inlen > expected_in_size &&
3166 !ib_is_udata_cleared(ucore, expected_in_size,
3167 ucore->inlen - expected_in_size))
3168 return -EOPNOTSUPP;
3169
3170 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3171 GFP_KERNEL);
3172 if (!wqs_handles)
3173 return -ENOMEM;
3174
3175 err = ib_copy_from_udata(wqs_handles, ucore,
3176 num_wq_handles * sizeof(__u32));
3177 if (err)
3178 goto err_free;
3179
3180 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3181 if (!wqs) {
3182 err = -ENOMEM;
3183 goto err_free;
3184 }
3185
3186 for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3187 num_read_wqs++) {
3188 wq = uobj_get_obj_read(wq, wqs_handles[num_read_wqs],
3189 file->ucontext);
3190 if (!wq) {
3191 err = -EINVAL;
3192 goto put_wqs;
3193 }
3194
3195 wqs[num_read_wqs] = wq;
3196 }
3197
3198 uobj = uobj_alloc(uobj_get_type(rwq_ind_table), file->ucontext);
3199 if (IS_ERR(uobj)) {
3200 err = PTR_ERR(uobj);
3201 goto put_wqs;
3202 }
3203
3204 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3205 init_attr.ind_tbl = wqs;
3206
3207 if (!ib_dev->create_rwq_ind_table) {
3208 err = -EOPNOTSUPP;
3209 goto err_uobj;
3210 }
3211 rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3212
3213 if (IS_ERR(rwq_ind_tbl)) {
3214 err = PTR_ERR(rwq_ind_tbl);
3215 goto err_uobj;
3216 }
3217
3218 rwq_ind_tbl->ind_tbl = wqs;
3219 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3220 rwq_ind_tbl->uobject = uobj;
3221 uobj->object = rwq_ind_tbl;
3222 rwq_ind_tbl->device = ib_dev;
3223 atomic_set(&rwq_ind_tbl->usecnt, 0);
3224
3225 for (i = 0; i < num_wq_handles; i++)
3226 atomic_inc(&wqs[i]->usecnt);
3227
3228 resp.ind_tbl_handle = uobj->id;
3229 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3230 resp.response_length = required_resp_len;
3231
3232 err = ib_copy_to_udata(ucore,
3233 &resp, resp.response_length);
3234 if (err)
3235 goto err_copy;
3236
3237 kfree(wqs_handles);
3238
3239 for (j = 0; j < num_read_wqs; j++)
3240 uobj_put_obj_read(wqs[j]);
3241
3242 uobj_alloc_commit(uobj);
3243 return 0;
3244
3245 err_copy:
3246 ib_destroy_rwq_ind_table(rwq_ind_tbl);
3247 err_uobj:
3248 uobj_alloc_abort(uobj);
3249 put_wqs:
3250 for (j = 0; j < num_read_wqs; j++)
3251 uobj_put_obj_read(wqs[j]);
3252 err_free:
3253 kfree(wqs_handles);
3254 kfree(wqs);
3255 return err;
3256 }
3257
3258 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3259 struct ib_device *ib_dev,
3260 struct ib_udata *ucore,
3261 struct ib_udata *uhw)
3262 {
3263 struct ib_uverbs_ex_destroy_rwq_ind_table cmd = {};
3264 struct ib_uobject *uobj;
3265 int ret;
3266 size_t required_cmd_sz;
3267
3268 required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3269
3270 if (ucore->inlen < required_cmd_sz)
3271 return -EINVAL;
3272
3273 if (ucore->inlen > sizeof(cmd) &&
3274 !ib_is_udata_cleared(ucore, sizeof(cmd),
3275 ucore->inlen - sizeof(cmd)))
3276 return -EOPNOTSUPP;
3277
3278 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3279 if (ret)
3280 return ret;
3281
3282 if (cmd.comp_mask)
3283 return -EOPNOTSUPP;
3284
3285 uobj = uobj_get_write(uobj_get_type(rwq_ind_table), cmd.ind_tbl_handle,
3286 file->ucontext);
3287 if (IS_ERR(uobj))
3288 return PTR_ERR(uobj);
3289
3290 return uobj_remove_commit(uobj);
3291 }
3292
3293 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3294 struct ib_device *ib_dev,
3295 struct ib_udata *ucore,
3296 struct ib_udata *uhw)
3297 {
3298 struct ib_uverbs_create_flow cmd;
3299 struct ib_uverbs_create_flow_resp resp;
3300 struct ib_uobject *uobj;
3301 struct ib_flow *flow_id;
3302 struct ib_uverbs_flow_attr *kern_flow_attr;
3303 struct ib_flow_attr *flow_attr;
3304 struct ib_qp *qp;
3305 int err = 0;
3306 void *kern_spec;
3307 void *ib_spec;
3308 int i;
3309
3310 if (ucore->inlen < sizeof(cmd))
3311 return -EINVAL;
3312
3313 if (ucore->outlen < sizeof(resp))
3314 return -ENOSPC;
3315
3316 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3317 if (err)
3318 return err;
3319
3320 ucore->inbuf += sizeof(cmd);
3321 ucore->inlen -= sizeof(cmd);
3322
3323 if (cmd.comp_mask)
3324 return -EINVAL;
3325
3326 if (!capable(CAP_NET_RAW))
3327 return -EPERM;
3328
3329 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3330 return -EINVAL;
3331
3332 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3333 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3334 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3335 return -EINVAL;
3336
3337 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3338 return -EINVAL;
3339
3340 if (cmd.flow_attr.size > ucore->inlen ||
3341 cmd.flow_attr.size >
3342 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3343 return -EINVAL;
3344
3345 if (cmd.flow_attr.reserved[0] ||
3346 cmd.flow_attr.reserved[1])
3347 return -EINVAL;
3348
3349 if (cmd.flow_attr.num_of_specs) {
3350 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3351 GFP_KERNEL);
3352 if (!kern_flow_attr)
3353 return -ENOMEM;
3354
3355 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3356 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3357 cmd.flow_attr.size);
3358 if (err)
3359 goto err_free_attr;
3360 } else {
3361 kern_flow_attr = &cmd.flow_attr;
3362 }
3363
3364 uobj = uobj_alloc(uobj_get_type(flow), file->ucontext);
3365 if (IS_ERR(uobj)) {
3366 err = PTR_ERR(uobj);
3367 goto err_free_attr;
3368 }
3369
3370 qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
3371 if (!qp) {
3372 err = -EINVAL;
3373 goto err_uobj;
3374 }
3375
3376 flow_attr = kzalloc(sizeof(*flow_attr) + cmd.flow_attr.num_of_specs *
3377 sizeof(union ib_flow_spec), GFP_KERNEL);
3378 if (!flow_attr) {
3379 err = -ENOMEM;
3380 goto err_put;
3381 }
3382
3383 flow_attr->type = kern_flow_attr->type;
3384 flow_attr->priority = kern_flow_attr->priority;
3385 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3386 flow_attr->port = kern_flow_attr->port;
3387 flow_attr->flags = kern_flow_attr->flags;
3388 flow_attr->size = sizeof(*flow_attr);
3389
3390 kern_spec = kern_flow_attr + 1;
3391 ib_spec = flow_attr + 1;
3392 for (i = 0; i < flow_attr->num_of_specs &&
3393 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3394 cmd.flow_attr.size >=
3395 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3396 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3397 if (err)
3398 goto err_free;
3399 flow_attr->size +=
3400 ((union ib_flow_spec *) ib_spec)->size;
3401 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3402 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3403 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3404 }
3405 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3406 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3407 i, cmd.flow_attr.size);
3408 err = -EINVAL;
3409 goto err_free;
3410 }
3411 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3412 if (IS_ERR(flow_id)) {
3413 err = PTR_ERR(flow_id);
3414 goto err_free;
3415 }
3416 flow_id->uobject = uobj;
3417 uobj->object = flow_id;
3418
3419 memset(&resp, 0, sizeof(resp));
3420 resp.flow_handle = uobj->id;
3421
3422 err = ib_copy_to_udata(ucore,
3423 &resp, sizeof(resp));
3424 if (err)
3425 goto err_copy;
3426
3427 uobj_put_obj_read(qp);
3428 uobj_alloc_commit(uobj);
3429 kfree(flow_attr);
3430 if (cmd.flow_attr.num_of_specs)
3431 kfree(kern_flow_attr);
3432 return 0;
3433 err_copy:
3434 ib_destroy_flow(flow_id);
3435 err_free:
3436 kfree(flow_attr);
3437 err_put:
3438 uobj_put_obj_read(qp);
3439 err_uobj:
3440 uobj_alloc_abort(uobj);
3441 err_free_attr:
3442 if (cmd.flow_attr.num_of_specs)
3443 kfree(kern_flow_attr);
3444 return err;
3445 }
3446
3447 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3448 struct ib_device *ib_dev,
3449 struct ib_udata *ucore,
3450 struct ib_udata *uhw)
3451 {
3452 struct ib_uverbs_destroy_flow cmd;
3453 struct ib_uobject *uobj;
3454 int ret;
3455
3456 if (ucore->inlen < sizeof(cmd))
3457 return -EINVAL;
3458
3459 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3460 if (ret)
3461 return ret;
3462
3463 if (cmd.comp_mask)
3464 return -EINVAL;
3465
3466 uobj = uobj_get_write(uobj_get_type(flow), cmd.flow_handle,
3467 file->ucontext);
3468 if (IS_ERR(uobj))
3469 return PTR_ERR(uobj);
3470
3471 ret = uobj_remove_commit(uobj);
3472 return ret;
3473 }
3474
3475 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3476 struct ib_device *ib_dev,
3477 struct ib_uverbs_create_xsrq *cmd,
3478 struct ib_udata *udata)
3479 {
3480 struct ib_uverbs_create_srq_resp resp;
3481 struct ib_usrq_object *obj;
3482 struct ib_pd *pd;
3483 struct ib_srq *srq;
3484 struct ib_uobject *uninitialized_var(xrcd_uobj);
3485 struct ib_srq_init_attr attr;
3486 int ret;
3487
3488 obj = (struct ib_usrq_object *)uobj_alloc(uobj_get_type(srq),
3489 file->ucontext);
3490 if (IS_ERR(obj))
3491 return PTR_ERR(obj);
3492
3493 if (cmd->srq_type == IB_SRQT_TM)
3494 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3495
3496 if (cmd->srq_type == IB_SRQT_XRC) {
3497 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->xrcd_handle,
3498 file->ucontext);
3499 if (IS_ERR(xrcd_uobj)) {
3500 ret = -EINVAL;
3501 goto err;
3502 }
3503
3504 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3505 if (!attr.ext.xrc.xrcd) {
3506 ret = -EINVAL;
3507 goto err_put_xrcd;
3508 }
3509
3510 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3511 atomic_inc(&obj->uxrcd->refcnt);
3512 }
3513
3514 if (ib_srq_has_cq(cmd->srq_type)) {
3515 attr.ext.cq = uobj_get_obj_read(cq, cmd->cq_handle,
3516 file->ucontext);
3517 if (!attr.ext.cq) {
3518 ret = -EINVAL;
3519 goto err_put_xrcd;
3520 }
3521 }
3522
3523 pd = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
3524 if (!pd) {
3525 ret = -EINVAL;
3526 goto err_put_cq;
3527 }
3528
3529 attr.event_handler = ib_uverbs_srq_event_handler;
3530 attr.srq_context = file;
3531 attr.srq_type = cmd->srq_type;
3532 attr.attr.max_wr = cmd->max_wr;
3533 attr.attr.max_sge = cmd->max_sge;
3534 attr.attr.srq_limit = cmd->srq_limit;
3535
3536 obj->uevent.events_reported = 0;
3537 INIT_LIST_HEAD(&obj->uevent.event_list);
3538
3539 srq = pd->device->create_srq(pd, &attr, udata);
3540 if (IS_ERR(srq)) {
3541 ret = PTR_ERR(srq);
3542 goto err_put;
3543 }
3544
3545 srq->device = pd->device;
3546 srq->pd = pd;
3547 srq->srq_type = cmd->srq_type;
3548 srq->uobject = &obj->uevent.uobject;
3549 srq->event_handler = attr.event_handler;
3550 srq->srq_context = attr.srq_context;
3551
3552 if (ib_srq_has_cq(cmd->srq_type)) {
3553 srq->ext.cq = attr.ext.cq;
3554 atomic_inc(&attr.ext.cq->usecnt);
3555 }
3556
3557 if (cmd->srq_type == IB_SRQT_XRC) {
3558 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3559 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3560 }
3561
3562 atomic_inc(&pd->usecnt);
3563 atomic_set(&srq->usecnt, 0);
3564
3565 obj->uevent.uobject.object = srq;
3566 obj->uevent.uobject.user_handle = cmd->user_handle;
3567
3568 memset(&resp, 0, sizeof resp);
3569 resp.srq_handle = obj->uevent.uobject.id;
3570 resp.max_wr = attr.attr.max_wr;
3571 resp.max_sge = attr.attr.max_sge;
3572 if (cmd->srq_type == IB_SRQT_XRC)
3573 resp.srqn = srq->ext.xrc.srq_num;
3574
3575 if (copy_to_user((void __user *) (unsigned long) cmd->response,
3576 &resp, sizeof resp)) {
3577 ret = -EFAULT;
3578 goto err_copy;
3579 }
3580
3581 if (cmd->srq_type == IB_SRQT_XRC)
3582 uobj_put_read(xrcd_uobj);
3583
3584 if (ib_srq_has_cq(cmd->srq_type))
3585 uobj_put_obj_read(attr.ext.cq);
3586
3587 uobj_put_obj_read(pd);
3588 uobj_alloc_commit(&obj->uevent.uobject);
3589
3590 return 0;
3591
3592 err_copy:
3593 ib_destroy_srq(srq);
3594
3595 err_put:
3596 uobj_put_obj_read(pd);
3597
3598 err_put_cq:
3599 if (ib_srq_has_cq(cmd->srq_type))
3600 uobj_put_obj_read(attr.ext.cq);
3601
3602 err_put_xrcd:
3603 if (cmd->srq_type == IB_SRQT_XRC) {
3604 atomic_dec(&obj->uxrcd->refcnt);
3605 uobj_put_read(xrcd_uobj);
3606 }
3607
3608 err:
3609 uobj_alloc_abort(&obj->uevent.uobject);
3610 return ret;
3611 }
3612
3613 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3614 struct ib_device *ib_dev,
3615 const char __user *buf, int in_len,
3616 int out_len)
3617 {
3618 struct ib_uverbs_create_srq cmd;
3619 struct ib_uverbs_create_xsrq xcmd;
3620 struct ib_uverbs_create_srq_resp resp;
3621 struct ib_udata udata;
3622 int ret;
3623
3624 if (out_len < sizeof resp)
3625 return -ENOSPC;
3626
3627 if (copy_from_user(&cmd, buf, sizeof cmd))
3628 return -EFAULT;
3629
3630 memset(&xcmd, 0, sizeof(xcmd));
3631 xcmd.response = cmd.response;
3632 xcmd.user_handle = cmd.user_handle;
3633 xcmd.srq_type = IB_SRQT_BASIC;
3634 xcmd.pd_handle = cmd.pd_handle;
3635 xcmd.max_wr = cmd.max_wr;
3636 xcmd.max_sge = cmd.max_sge;
3637 xcmd.srq_limit = cmd.srq_limit;
3638
3639 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
3640 u64_to_user_ptr(cmd.response) + sizeof(resp),
3641 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
3642 out_len - sizeof(resp));
3643
3644 ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3645 if (ret)
3646 return ret;
3647
3648 return in_len;
3649 }
3650
3651 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3652 struct ib_device *ib_dev,
3653 const char __user *buf, int in_len, int out_len)
3654 {
3655 struct ib_uverbs_create_xsrq cmd;
3656 struct ib_uverbs_create_srq_resp resp;
3657 struct ib_udata udata;
3658 int ret;
3659
3660 if (out_len < sizeof resp)
3661 return -ENOSPC;
3662
3663 if (copy_from_user(&cmd, buf, sizeof cmd))
3664 return -EFAULT;
3665
3666 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
3667 u64_to_user_ptr(cmd.response) + sizeof(resp),
3668 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
3669 out_len - sizeof(resp));
3670
3671 ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3672 if (ret)
3673 return ret;
3674
3675 return in_len;
3676 }
3677
3678 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3679 struct ib_device *ib_dev,
3680 const char __user *buf, int in_len,
3681 int out_len)
3682 {
3683 struct ib_uverbs_modify_srq cmd;
3684 struct ib_udata udata;
3685 struct ib_srq *srq;
3686 struct ib_srq_attr attr;
3687 int ret;
3688
3689 if (copy_from_user(&cmd, buf, sizeof cmd))
3690 return -EFAULT;
3691
3692 ib_uverbs_init_udata(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3693 out_len);
3694
3695 srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3696 if (!srq)
3697 return -EINVAL;
3698
3699 attr.max_wr = cmd.max_wr;
3700 attr.srq_limit = cmd.srq_limit;
3701
3702 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3703
3704 uobj_put_obj_read(srq);
3705
3706 return ret ? ret : in_len;
3707 }
3708
3709 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3710 struct ib_device *ib_dev,
3711 const char __user *buf,
3712 int in_len, int out_len)
3713 {
3714 struct ib_uverbs_query_srq cmd;
3715 struct ib_uverbs_query_srq_resp resp;
3716 struct ib_srq_attr attr;
3717 struct ib_srq *srq;
3718 int ret;
3719
3720 if (out_len < sizeof resp)
3721 return -ENOSPC;
3722
3723 if (copy_from_user(&cmd, buf, sizeof cmd))
3724 return -EFAULT;
3725
3726 srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3727 if (!srq)
3728 return -EINVAL;
3729
3730 ret = ib_query_srq(srq, &attr);
3731
3732 uobj_put_obj_read(srq);
3733
3734 if (ret)
3735 return ret;
3736
3737 memset(&resp, 0, sizeof resp);
3738
3739 resp.max_wr = attr.max_wr;
3740 resp.max_sge = attr.max_sge;
3741 resp.srq_limit = attr.srq_limit;
3742
3743 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
3744 return -EFAULT;
3745
3746 return in_len;
3747 }
3748
3749 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3750 struct ib_device *ib_dev,
3751 const char __user *buf, int in_len,
3752 int out_len)
3753 {
3754 struct ib_uverbs_destroy_srq cmd;
3755 struct ib_uverbs_destroy_srq_resp resp;
3756 struct ib_uobject *uobj;
3757 struct ib_uevent_object *obj;
3758 int ret = -EINVAL;
3759
3760 if (copy_from_user(&cmd, buf, sizeof cmd))
3761 return -EFAULT;
3762
3763 uobj = uobj_get_write(uobj_get_type(srq), cmd.srq_handle,
3764 file->ucontext);
3765 if (IS_ERR(uobj))
3766 return PTR_ERR(uobj);
3767
3768 obj = container_of(uobj, struct ib_uevent_object, uobject);
3769 /*
3770 * Make sure we don't free the memory in remove_commit as we still
3771 * needs the uobject memory to create the response.
3772 */
3773 uverbs_uobject_get(uobj);
3774
3775 memset(&resp, 0, sizeof(resp));
3776
3777 ret = uobj_remove_commit(uobj);
3778 if (ret) {
3779 uverbs_uobject_put(uobj);
3780 return ret;
3781 }
3782 resp.events_reported = obj->events_reported;
3783 uverbs_uobject_put(uobj);
3784 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
3785 return -EFAULT;
3786
3787 return in_len;
3788 }
3789
3790 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3791 struct ib_device *ib_dev,
3792 struct ib_udata *ucore,
3793 struct ib_udata *uhw)
3794 {
3795 struct ib_uverbs_ex_query_device_resp resp = { {0} };
3796 struct ib_uverbs_ex_query_device cmd;
3797 struct ib_device_attr attr = {0};
3798 int err;
3799
3800 if (!ib_dev->query_device)
3801 return -EOPNOTSUPP;
3802
3803 if (ucore->inlen < sizeof(cmd))
3804 return -EINVAL;
3805
3806 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3807 if (err)
3808 return err;
3809
3810 if (cmd.comp_mask)
3811 return -EINVAL;
3812
3813 if (cmd.reserved)
3814 return -EINVAL;
3815
3816 resp.response_length = offsetof(typeof(resp), odp_caps);
3817
3818 if (ucore->outlen < resp.response_length)
3819 return -ENOSPC;
3820
3821 err = ib_dev->query_device(ib_dev, &attr, uhw);
3822 if (err)
3823 return err;
3824
3825 copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3826
3827 if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3828 goto end;
3829
3830 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3831 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3832 resp.odp_caps.per_transport_caps.rc_odp_caps =
3833 attr.odp_caps.per_transport_caps.rc_odp_caps;
3834 resp.odp_caps.per_transport_caps.uc_odp_caps =
3835 attr.odp_caps.per_transport_caps.uc_odp_caps;
3836 resp.odp_caps.per_transport_caps.ud_odp_caps =
3837 attr.odp_caps.per_transport_caps.ud_odp_caps;
3838 #endif
3839 resp.response_length += sizeof(resp.odp_caps);
3840
3841 if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3842 goto end;
3843
3844 resp.timestamp_mask = attr.timestamp_mask;
3845 resp.response_length += sizeof(resp.timestamp_mask);
3846
3847 if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3848 goto end;
3849
3850 resp.hca_core_clock = attr.hca_core_clock;
3851 resp.response_length += sizeof(resp.hca_core_clock);
3852
3853 if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
3854 goto end;
3855
3856 resp.device_cap_flags_ex = attr.device_cap_flags;
3857 resp.response_length += sizeof(resp.device_cap_flags_ex);
3858
3859 if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
3860 goto end;
3861
3862 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3863 resp.rss_caps.max_rwq_indirection_tables =
3864 attr.rss_caps.max_rwq_indirection_tables;
3865 resp.rss_caps.max_rwq_indirection_table_size =
3866 attr.rss_caps.max_rwq_indirection_table_size;
3867
3868 resp.response_length += sizeof(resp.rss_caps);
3869
3870 if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
3871 goto end;
3872
3873 resp.max_wq_type_rq = attr.max_wq_type_rq;
3874 resp.response_length += sizeof(resp.max_wq_type_rq);
3875
3876 if (ucore->outlen < resp.response_length + sizeof(resp.raw_packet_caps))
3877 goto end;
3878
3879 resp.raw_packet_caps = attr.raw_packet_caps;
3880 resp.response_length += sizeof(resp.raw_packet_caps);
3881
3882 if (ucore->outlen < resp.response_length + sizeof(resp.tm_caps))
3883 goto end;
3884
3885 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size;
3886 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags;
3887 resp.tm_caps.max_ops = attr.tm_caps.max_ops;
3888 resp.tm_caps.max_sge = attr.tm_caps.max_sge;
3889 resp.tm_caps.flags = attr.tm_caps.flags;
3890 resp.response_length += sizeof(resp.tm_caps);
3891
3892 if (ucore->outlen < resp.response_length + sizeof(resp.cq_moderation_caps))
3893 goto end;
3894
3895 resp.cq_moderation_caps.max_cq_moderation_count =
3896 attr.cq_caps.max_cq_moderation_count;
3897 resp.cq_moderation_caps.max_cq_moderation_period =
3898 attr.cq_caps.max_cq_moderation_period;
3899 resp.response_length += sizeof(resp.cq_moderation_caps);
3900 end:
3901 err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3902 return err;
3903 }
3904
3905 int ib_uverbs_ex_modify_cq(struct ib_uverbs_file *file,
3906 struct ib_device *ib_dev,
3907 struct ib_udata *ucore,
3908 struct ib_udata *uhw)
3909 {
3910 struct ib_uverbs_ex_modify_cq cmd = {};
3911 struct ib_cq *cq;
3912 size_t required_cmd_sz;
3913 int ret;
3914
3915 required_cmd_sz = offsetof(typeof(cmd), reserved) +
3916 sizeof(cmd.reserved);
3917 if (ucore->inlen < required_cmd_sz)
3918 return -EINVAL;
3919
3920 /* sanity checks */
3921 if (ucore->inlen > sizeof(cmd) &&
3922 !ib_is_udata_cleared(ucore, sizeof(cmd),
3923 ucore->inlen - sizeof(cmd)))
3924 return -EOPNOTSUPP;
3925
3926 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3927 if (ret)
3928 return ret;
3929
3930 if (!cmd.attr_mask || cmd.reserved)
3931 return -EINVAL;
3932
3933 if (cmd.attr_mask > IB_CQ_MODERATE)
3934 return -EOPNOTSUPP;
3935
3936 cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
3937 if (!cq)
3938 return -EINVAL;
3939
3940 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3941
3942 uobj_put_obj_read(cq);
3943
3944 return ret;
3945 }
CRIS linux kernel tree