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powerpc/mm/4k: don't allocate larger pmd page table for 4k
[linux/fpc-iii.git] / drivers / infiniband / core / uverbs_cmd.c
blob70078220348383eec62b9b6252a5607f9255e9fa
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 "uverbs.h"
44 #include "core_priv.h"
45
46 struct uverbs_lock_class {
47 struct lock_class_key key;
48 char name[16];
49 };
50
51 static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" };
52 static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" };
53 static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" };
54 static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" };
55 static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" };
56 static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" };
57 static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" };
58 static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
59 static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" };
60 static struct uverbs_lock_class wq_lock_class = { .name = "WQ-uobj" };
61 static struct uverbs_lock_class rwq_ind_table_lock_class = { .name = "IND_TBL-uobj" };
62
63 /*
64 * The ib_uobject locking scheme is as follows:
65 *
66 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
67 * needs to be held during all idr write operations. When an object is
68 * looked up, a reference must be taken on the object's kref before
69 * dropping this lock. For read operations, the rcu_read_lock()
70 * and rcu_write_lock() but similarly the kref reference is grabbed
71 * before the rcu_read_unlock().
72 *
73 * - Each object also has an rwsem. This rwsem must be held for
74 * reading while an operation that uses the object is performed.
75 * For example, while registering an MR, the associated PD's
76 * uobject.mutex must be held for reading. The rwsem must be held
77 * for writing while initializing or destroying an object.
78 *
79 * - In addition, each object has a "live" flag. If this flag is not
80 * set, then lookups of the object will fail even if it is found in
81 * the idr. This handles a reader that blocks and does not acquire
82 * the rwsem until after the object is destroyed. The destroy
83 * operation will set the live flag to 0 and then drop the rwsem;
84 * this will allow the reader to acquire the rwsem, see that the
85 * live flag is 0, and then drop the rwsem and its reference to
86 * object. The underlying storage will not be freed until the last
87 * reference to the object is dropped.
88 */
89
90 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
91 struct ib_ucontext *context, struct uverbs_lock_class *c)
92 {
93 uobj->user_handle = user_handle;
94 uobj->context = context;
95 kref_init(&uobj->ref);
96 init_rwsem(&uobj->mutex);
97 lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
98 uobj->live = 0;
99 }
100
101 static void release_uobj(struct kref *kref)
102 {
103 kfree_rcu(container_of(kref, struct ib_uobject, ref), rcu);
104 }
105
106 static void put_uobj(struct ib_uobject *uobj)
107 {
108 kref_put(&uobj->ref, release_uobj);
109 }
110
111 static void put_uobj_read(struct ib_uobject *uobj)
112 {
113 up_read(&uobj->mutex);
114 put_uobj(uobj);
115 }
116
117 static void put_uobj_write(struct ib_uobject *uobj)
118 {
119 up_write(&uobj->mutex);
120 put_uobj(uobj);
121 }
122
123 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
124 {
125 int ret;
126
127 idr_preload(GFP_KERNEL);
128 spin_lock(&ib_uverbs_idr_lock);
129
130 ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT);
131 if (ret >= 0)
132 uobj->id = ret;
133
134 spin_unlock(&ib_uverbs_idr_lock);
135 idr_preload_end();
136
137 return ret < 0 ? ret : 0;
138 }
139
140 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
141 {
142 spin_lock(&ib_uverbs_idr_lock);
143 idr_remove(idr, uobj->id);
144 spin_unlock(&ib_uverbs_idr_lock);
145 }
146
147 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
148 struct ib_ucontext *context)
149 {
150 struct ib_uobject *uobj;
151
152 rcu_read_lock();
153 uobj = idr_find(idr, id);
154 if (uobj) {
155 if (uobj->context == context)
156 kref_get(&uobj->ref);
157 else
158 uobj = NULL;
159 }
160 rcu_read_unlock();
161
162 return uobj;
163 }
164
165 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
166 struct ib_ucontext *context, int nested)
167 {
168 struct ib_uobject *uobj;
169
170 uobj = __idr_get_uobj(idr, id, context);
171 if (!uobj)
172 return NULL;
173
174 if (nested)
175 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
176 else
177 down_read(&uobj->mutex);
178 if (!uobj->live) {
179 put_uobj_read(uobj);
180 return NULL;
181 }
182
183 return uobj;
184 }
185
186 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
187 struct ib_ucontext *context)
188 {
189 struct ib_uobject *uobj;
190
191 uobj = __idr_get_uobj(idr, id, context);
192 if (!uobj)
193 return NULL;
194
195 down_write(&uobj->mutex);
196 if (!uobj->live) {
197 put_uobj_write(uobj);
198 return NULL;
199 }
200
201 return uobj;
202 }
203
204 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
205 int nested)
206 {
207 struct ib_uobject *uobj;
208
209 uobj = idr_read_uobj(idr, id, context, nested);
210 return uobj ? uobj->object : NULL;
211 }
212
213 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
214 {
215 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
216 }
217
218 static void put_pd_read(struct ib_pd *pd)
219 {
220 put_uobj_read(pd->uobject);
221 }
222
223 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
224 {
225 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
226 }
227
228 static void put_cq_read(struct ib_cq *cq)
229 {
230 put_uobj_read(cq->uobject);
231 }
232
233 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
234 {
235 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
236 }
237
238 static void put_ah_read(struct ib_ah *ah)
239 {
240 put_uobj_read(ah->uobject);
241 }
242
243 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
244 {
245 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
246 }
247
248 static struct ib_wq *idr_read_wq(int wq_handle, struct ib_ucontext *context)
249 {
250 return idr_read_obj(&ib_uverbs_wq_idr, wq_handle, context, 0);
251 }
252
253 static void put_wq_read(struct ib_wq *wq)
254 {
255 put_uobj_read(wq->uobject);
256 }
257
258 static struct ib_rwq_ind_table *idr_read_rwq_indirection_table(int ind_table_handle,
259 struct ib_ucontext *context)
260 {
261 return idr_read_obj(&ib_uverbs_rwq_ind_tbl_idr, ind_table_handle, context, 0);
262 }
263
264 static void put_rwq_indirection_table_read(struct ib_rwq_ind_table *ind_table)
265 {
266 put_uobj_read(ind_table->uobject);
267 }
268
269 static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context)
270 {
271 struct ib_uobject *uobj;
272
273 uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context);
274 return uobj ? uobj->object : NULL;
275 }
276
277 static void put_qp_read(struct ib_qp *qp)
278 {
279 put_uobj_read(qp->uobject);
280 }
281
282 static void put_qp_write(struct ib_qp *qp)
283 {
284 put_uobj_write(qp->uobject);
285 }
286
287 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
288 {
289 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
290 }
291
292 static void put_srq_read(struct ib_srq *srq)
293 {
294 put_uobj_read(srq->uobject);
295 }
296
297 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
298 struct ib_uobject **uobj)
299 {
300 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
301 return *uobj ? (*uobj)->object : NULL;
302 }
303
304 static void put_xrcd_read(struct ib_uobject *uobj)
305 {
306 put_uobj_read(uobj);
307 }
308
309 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
310 struct ib_device *ib_dev,
311 const char __user *buf,
312 int in_len, int out_len)
313 {
314 struct ib_uverbs_get_context cmd;
315 struct ib_uverbs_get_context_resp resp;
316 struct ib_udata udata;
317 struct ib_ucontext *ucontext;
318 struct file *filp;
319 int ret;
320
321 if (out_len < sizeof resp)
322 return -ENOSPC;
323
324 if (copy_from_user(&cmd, buf, sizeof cmd))
325 return -EFAULT;
326
327 mutex_lock(&file->mutex);
328
329 if (file->ucontext) {
330 ret = -EINVAL;
331 goto err;
332 }
333
334 INIT_UDATA(&udata, buf + sizeof cmd,
335 (unsigned long) cmd.response + sizeof resp,
336 in_len - sizeof cmd, out_len - sizeof resp);
337
338 ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
339 if (IS_ERR(ucontext)) {
340 ret = PTR_ERR(ucontext);
341 goto err;
342 }
343
344 ucontext->device = ib_dev;
345 INIT_LIST_HEAD(&ucontext->pd_list);
346 INIT_LIST_HEAD(&ucontext->mr_list);
347 INIT_LIST_HEAD(&ucontext->mw_list);
348 INIT_LIST_HEAD(&ucontext->cq_list);
349 INIT_LIST_HEAD(&ucontext->qp_list);
350 INIT_LIST_HEAD(&ucontext->srq_list);
351 INIT_LIST_HEAD(&ucontext->ah_list);
352 INIT_LIST_HEAD(&ucontext->wq_list);
353 INIT_LIST_HEAD(&ucontext->rwq_ind_tbl_list);
354 INIT_LIST_HEAD(&ucontext->xrcd_list);
355 INIT_LIST_HEAD(&ucontext->rule_list);
356 rcu_read_lock();
357 ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
358 rcu_read_unlock();
359 ucontext->closing = 0;
360
361 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
362 ucontext->umem_tree = RB_ROOT;
363 init_rwsem(&ucontext->umem_rwsem);
364 ucontext->odp_mrs_count = 0;
365 INIT_LIST_HEAD(&ucontext->no_private_counters);
366
367 if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
368 ucontext->invalidate_range = NULL;
369
370 #endif
371
372 resp.num_comp_vectors = file->device->num_comp_vectors;
373
374 ret = get_unused_fd_flags(O_CLOEXEC);
375 if (ret < 0)
376 goto err_free;
377 resp.async_fd = ret;
378
379 filp = ib_uverbs_alloc_event_file(file, ib_dev, 1);
380 if (IS_ERR(filp)) {
381 ret = PTR_ERR(filp);
382 goto err_fd;
383 }
384
385 if (copy_to_user((void __user *) (unsigned long) cmd.response,
386 &resp, sizeof resp)) {
387 ret = -EFAULT;
388 goto err_file;
389 }
390
391 file->ucontext = ucontext;
392
393 fd_install(resp.async_fd, filp);
394
395 mutex_unlock(&file->mutex);
396
397 return in_len;
398
399 err_file:
400 ib_uverbs_free_async_event_file(file);
401 fput(filp);
402
403 err_fd:
404 put_unused_fd(resp.async_fd);
405
406 err_free:
407 put_pid(ucontext->tgid);
408 ib_dev->dealloc_ucontext(ucontext);
409
410 err:
411 mutex_unlock(&file->mutex);
412 return ret;
413 }
414
415 static void copy_query_dev_fields(struct ib_uverbs_file *file,
416 struct ib_device *ib_dev,
417 struct ib_uverbs_query_device_resp *resp,
418 struct ib_device_attr *attr)
419 {
420 resp->fw_ver = attr->fw_ver;
421 resp->node_guid = ib_dev->node_guid;
422 resp->sys_image_guid = attr->sys_image_guid;
423 resp->max_mr_size = attr->max_mr_size;
424 resp->page_size_cap = attr->page_size_cap;
425 resp->vendor_id = attr->vendor_id;
426 resp->vendor_part_id = attr->vendor_part_id;
427 resp->hw_ver = attr->hw_ver;
428 resp->max_qp = attr->max_qp;
429 resp->max_qp_wr = attr->max_qp_wr;
430 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags);
431 resp->max_sge = attr->max_sge;
432 resp->max_sge_rd = attr->max_sge_rd;
433 resp->max_cq = attr->max_cq;
434 resp->max_cqe = attr->max_cqe;
435 resp->max_mr = attr->max_mr;
436 resp->max_pd = attr->max_pd;
437 resp->max_qp_rd_atom = attr->max_qp_rd_atom;
438 resp->max_ee_rd_atom = attr->max_ee_rd_atom;
439 resp->max_res_rd_atom = attr->max_res_rd_atom;
440 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom;
441 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom;
442 resp->atomic_cap = attr->atomic_cap;
443 resp->max_ee = attr->max_ee;
444 resp->max_rdd = attr->max_rdd;
445 resp->max_mw = attr->max_mw;
446 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
447 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
448 resp->max_mcast_grp = attr->max_mcast_grp;
449 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
450 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
451 resp->max_ah = attr->max_ah;
452 resp->max_fmr = attr->max_fmr;
453 resp->max_map_per_fmr = attr->max_map_per_fmr;
454 resp->max_srq = attr->max_srq;
455 resp->max_srq_wr = attr->max_srq_wr;
456 resp->max_srq_sge = attr->max_srq_sge;
457 resp->max_pkeys = attr->max_pkeys;
458 resp->local_ca_ack_delay = attr->local_ca_ack_delay;
459 resp->phys_port_cnt = ib_dev->phys_port_cnt;
460 }
461
462 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
463 struct ib_device *ib_dev,
464 const char __user *buf,
465 int in_len, int out_len)
466 {
467 struct ib_uverbs_query_device cmd;
468 struct ib_uverbs_query_device_resp resp;
469
470 if (out_len < sizeof resp)
471 return -ENOSPC;
472
473 if (copy_from_user(&cmd, buf, sizeof cmd))
474 return -EFAULT;
475
476 memset(&resp, 0, sizeof resp);
477 copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs);
478
479 if (copy_to_user((void __user *) (unsigned long) cmd.response,
480 &resp, sizeof resp))
481 return -EFAULT;
482
483 return in_len;
484 }
485
486 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
487 struct ib_device *ib_dev,
488 const char __user *buf,
489 int in_len, int out_len)
490 {
491 struct ib_uverbs_query_port cmd;
492 struct ib_uverbs_query_port_resp resp;
493 struct ib_port_attr attr;
494 int ret;
495
496 if (out_len < sizeof resp)
497 return -ENOSPC;
498
499 if (copy_from_user(&cmd, buf, sizeof cmd))
500 return -EFAULT;
501
502 ret = ib_query_port(ib_dev, cmd.port_num, &attr);
503 if (ret)
504 return ret;
505
506 memset(&resp, 0, sizeof resp);
507
508 resp.state = attr.state;
509 resp.max_mtu = attr.max_mtu;
510 resp.active_mtu = attr.active_mtu;
511 resp.gid_tbl_len = attr.gid_tbl_len;
512 resp.port_cap_flags = attr.port_cap_flags;
513 resp.max_msg_sz = attr.max_msg_sz;
514 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
515 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
516 resp.pkey_tbl_len = attr.pkey_tbl_len;
517 resp.lid = attr.lid;
518 resp.sm_lid = attr.sm_lid;
519 resp.lmc = attr.lmc;
520 resp.max_vl_num = attr.max_vl_num;
521 resp.sm_sl = attr.sm_sl;
522 resp.subnet_timeout = attr.subnet_timeout;
523 resp.init_type_reply = attr.init_type_reply;
524 resp.active_width = attr.active_width;
525 resp.active_speed = attr.active_speed;
526 resp.phys_state = attr.phys_state;
527 resp.link_layer = rdma_port_get_link_layer(ib_dev,
528 cmd.port_num);
529
530 if (copy_to_user((void __user *) (unsigned long) cmd.response,
531 &resp, sizeof resp))
532 return -EFAULT;
533
534 return in_len;
535 }
536
537 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
538 struct ib_device *ib_dev,
539 const char __user *buf,
540 int in_len, int out_len)
541 {
542 struct ib_uverbs_alloc_pd cmd;
543 struct ib_uverbs_alloc_pd_resp resp;
544 struct ib_udata udata;
545 struct ib_uobject *uobj;
546 struct ib_pd *pd;
547 int ret;
548
549 if (out_len < sizeof resp)
550 return -ENOSPC;
551
552 if (copy_from_user(&cmd, buf, sizeof cmd))
553 return -EFAULT;
554
555 INIT_UDATA(&udata, buf + sizeof cmd,
556 (unsigned long) cmd.response + sizeof resp,
557 in_len - sizeof cmd, out_len - sizeof resp);
558
559 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
560 if (!uobj)
561 return -ENOMEM;
562
563 init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
564 down_write(&uobj->mutex);
565
566 pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
567 if (IS_ERR(pd)) {
568 ret = PTR_ERR(pd);
569 goto err;
570 }
571
572 pd->device = ib_dev;
573 pd->uobject = uobj;
574 pd->__internal_mr = NULL;
575 atomic_set(&pd->usecnt, 0);
576
577 uobj->object = pd;
578 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
579 if (ret)
580 goto err_idr;
581
582 memset(&resp, 0, sizeof resp);
583 resp.pd_handle = uobj->id;
584
585 if (copy_to_user((void __user *) (unsigned long) cmd.response,
586 &resp, sizeof resp)) {
587 ret = -EFAULT;
588 goto err_copy;
589 }
590
591 mutex_lock(&file->mutex);
592 list_add_tail(&uobj->list, &file->ucontext->pd_list);
593 mutex_unlock(&file->mutex);
594
595 uobj->live = 1;
596
597 up_write(&uobj->mutex);
598
599 return in_len;
600
601 err_copy:
602 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
603
604 err_idr:
605 ib_dealloc_pd(pd);
606
607 err:
608 put_uobj_write(uobj);
609 return ret;
610 }
611
612 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
613 struct ib_device *ib_dev,
614 const char __user *buf,
615 int in_len, int out_len)
616 {
617 struct ib_uverbs_dealloc_pd cmd;
618 struct ib_uobject *uobj;
619 struct ib_pd *pd;
620 int ret;
621
622 if (copy_from_user(&cmd, buf, sizeof cmd))
623 return -EFAULT;
624
625 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
626 if (!uobj)
627 return -EINVAL;
628 pd = uobj->object;
629
630 if (atomic_read(&pd->usecnt)) {
631 ret = -EBUSY;
632 goto err_put;
633 }
634
635 ret = pd->device->dealloc_pd(uobj->object);
636 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
637 if (ret)
638 goto err_put;
639
640 uobj->live = 0;
641 put_uobj_write(uobj);
642
643 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
644
645 mutex_lock(&file->mutex);
646 list_del(&uobj->list);
647 mutex_unlock(&file->mutex);
648
649 put_uobj(uobj);
650
651 return in_len;
652
653 err_put:
654 put_uobj_write(uobj);
655 return ret;
656 }
657
658 struct xrcd_table_entry {
659 struct rb_node node;
660 struct ib_xrcd *xrcd;
661 struct inode *inode;
662 };
663
664 static int xrcd_table_insert(struct ib_uverbs_device *dev,
665 struct inode *inode,
666 struct ib_xrcd *xrcd)
667 {
668 struct xrcd_table_entry *entry, *scan;
669 struct rb_node **p = &dev->xrcd_tree.rb_node;
670 struct rb_node *parent = NULL;
671
672 entry = kmalloc(sizeof *entry, GFP_KERNEL);
673 if (!entry)
674 return -ENOMEM;
675
676 entry->xrcd = xrcd;
677 entry->inode = inode;
678
679 while (*p) {
680 parent = *p;
681 scan = rb_entry(parent, struct xrcd_table_entry, node);
682
683 if (inode < scan->inode) {
684 p = &(*p)->rb_left;
685 } else if (inode > scan->inode) {
686 p = &(*p)->rb_right;
687 } else {
688 kfree(entry);
689 return -EEXIST;
690 }
691 }
692
693 rb_link_node(&entry->node, parent, p);
694 rb_insert_color(&entry->node, &dev->xrcd_tree);
695 igrab(inode);
696 return 0;
697 }
698
699 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
700 struct inode *inode)
701 {
702 struct xrcd_table_entry *entry;
703 struct rb_node *p = dev->xrcd_tree.rb_node;
704
705 while (p) {
706 entry = rb_entry(p, struct xrcd_table_entry, node);
707
708 if (inode < entry->inode)
709 p = p->rb_left;
710 else if (inode > entry->inode)
711 p = p->rb_right;
712 else
713 return entry;
714 }
715
716 return NULL;
717 }
718
719 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
720 {
721 struct xrcd_table_entry *entry;
722
723 entry = xrcd_table_search(dev, inode);
724 if (!entry)
725 return NULL;
726
727 return entry->xrcd;
728 }
729
730 static void xrcd_table_delete(struct ib_uverbs_device *dev,
731 struct inode *inode)
732 {
733 struct xrcd_table_entry *entry;
734
735 entry = xrcd_table_search(dev, inode);
736 if (entry) {
737 iput(inode);
738 rb_erase(&entry->node, &dev->xrcd_tree);
739 kfree(entry);
740 }
741 }
742
743 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
744 struct ib_device *ib_dev,
745 const char __user *buf, int in_len,
746 int out_len)
747 {
748 struct ib_uverbs_open_xrcd cmd;
749 struct ib_uverbs_open_xrcd_resp resp;
750 struct ib_udata udata;
751 struct ib_uxrcd_object *obj;
752 struct ib_xrcd *xrcd = NULL;
753 struct fd f = {NULL, 0};
754 struct inode *inode = NULL;
755 int ret = 0;
756 int new_xrcd = 0;
757
758 if (out_len < sizeof resp)
759 return -ENOSPC;
760
761 if (copy_from_user(&cmd, buf, sizeof cmd))
762 return -EFAULT;
763
764 INIT_UDATA(&udata, buf + sizeof cmd,
765 (unsigned long) cmd.response + sizeof resp,
766 in_len - sizeof cmd, out_len - sizeof resp);
767
768 mutex_lock(&file->device->xrcd_tree_mutex);
769
770 if (cmd.fd != -1) {
771 /* search for file descriptor */
772 f = fdget(cmd.fd);
773 if (!f.file) {
774 ret = -EBADF;
775 goto err_tree_mutex_unlock;
776 }
777
778 inode = file_inode(f.file);
779 xrcd = find_xrcd(file->device, inode);
780 if (!xrcd && !(cmd.oflags & O_CREAT)) {
781 /* no file descriptor. Need CREATE flag */
782 ret = -EAGAIN;
783 goto err_tree_mutex_unlock;
784 }
785
786 if (xrcd && cmd.oflags & O_EXCL) {
787 ret = -EINVAL;
788 goto err_tree_mutex_unlock;
789 }
790 }
791
792 obj = kmalloc(sizeof *obj, GFP_KERNEL);
793 if (!obj) {
794 ret = -ENOMEM;
795 goto err_tree_mutex_unlock;
796 }
797
798 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
799
800 down_write(&obj->uobject.mutex);
801
802 if (!xrcd) {
803 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
804 if (IS_ERR(xrcd)) {
805 ret = PTR_ERR(xrcd);
806 goto err;
807 }
808
809 xrcd->inode = inode;
810 xrcd->device = ib_dev;
811 atomic_set(&xrcd->usecnt, 0);
812 mutex_init(&xrcd->tgt_qp_mutex);
813 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
814 new_xrcd = 1;
815 }
816
817 atomic_set(&obj->refcnt, 0);
818 obj->uobject.object = xrcd;
819 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
820 if (ret)
821 goto err_idr;
822
823 memset(&resp, 0, sizeof resp);
824 resp.xrcd_handle = obj->uobject.id;
825
826 if (inode) {
827 if (new_xrcd) {
828 /* create new inode/xrcd table entry */
829 ret = xrcd_table_insert(file->device, inode, xrcd);
830 if (ret)
831 goto err_insert_xrcd;
832 }
833 atomic_inc(&xrcd->usecnt);
834 }
835
836 if (copy_to_user((void __user *) (unsigned long) cmd.response,
837 &resp, sizeof resp)) {
838 ret = -EFAULT;
839 goto err_copy;
840 }
841
842 if (f.file)
843 fdput(f);
844
845 mutex_lock(&file->mutex);
846 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
847 mutex_unlock(&file->mutex);
848
849 obj->uobject.live = 1;
850 up_write(&obj->uobject.mutex);
851
852 mutex_unlock(&file->device->xrcd_tree_mutex);
853 return in_len;
854
855 err_copy:
856 if (inode) {
857 if (new_xrcd)
858 xrcd_table_delete(file->device, inode);
859 atomic_dec(&xrcd->usecnt);
860 }
861
862 err_insert_xrcd:
863 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
864
865 err_idr:
866 ib_dealloc_xrcd(xrcd);
867
868 err:
869 put_uobj_write(&obj->uobject);
870
871 err_tree_mutex_unlock:
872 if (f.file)
873 fdput(f);
874
875 mutex_unlock(&file->device->xrcd_tree_mutex);
876
877 return ret;
878 }
879
880 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
881 struct ib_device *ib_dev,
882 const char __user *buf, int in_len,
883 int out_len)
884 {
885 struct ib_uverbs_close_xrcd cmd;
886 struct ib_uobject *uobj;
887 struct ib_xrcd *xrcd = NULL;
888 struct inode *inode = NULL;
889 struct ib_uxrcd_object *obj;
890 int live;
891 int ret = 0;
892
893 if (copy_from_user(&cmd, buf, sizeof cmd))
894 return -EFAULT;
895
896 mutex_lock(&file->device->xrcd_tree_mutex);
897 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
898 if (!uobj) {
899 ret = -EINVAL;
900 goto out;
901 }
902
903 xrcd = uobj->object;
904 inode = xrcd->inode;
905 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
906 if (atomic_read(&obj->refcnt)) {
907 put_uobj_write(uobj);
908 ret = -EBUSY;
909 goto out;
910 }
911
912 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
913 ret = ib_dealloc_xrcd(uobj->object);
914 if (!ret)
915 uobj->live = 0;
916 }
917
918 live = uobj->live;
919 if (inode && ret)
920 atomic_inc(&xrcd->usecnt);
921
922 put_uobj_write(uobj);
923
924 if (ret)
925 goto out;
926
927 if (inode && !live)
928 xrcd_table_delete(file->device, inode);
929
930 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
931 mutex_lock(&file->mutex);
932 list_del(&uobj->list);
933 mutex_unlock(&file->mutex);
934
935 put_uobj(uobj);
936 ret = in_len;
937
938 out:
939 mutex_unlock(&file->device->xrcd_tree_mutex);
940 return ret;
941 }
942
943 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
944 struct ib_xrcd *xrcd)
945 {
946 struct inode *inode;
947
948 inode = xrcd->inode;
949 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
950 return;
951
952 ib_dealloc_xrcd(xrcd);
953
954 if (inode)
955 xrcd_table_delete(dev, inode);
956 }
957
958 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
959 struct ib_device *ib_dev,
960 const char __user *buf, int in_len,
961 int out_len)
962 {
963 struct ib_uverbs_reg_mr cmd;
964 struct ib_uverbs_reg_mr_resp resp;
965 struct ib_udata udata;
966 struct ib_uobject *uobj;
967 struct ib_pd *pd;
968 struct ib_mr *mr;
969 int ret;
970
971 if (out_len < sizeof resp)
972 return -ENOSPC;
973
974 if (copy_from_user(&cmd, buf, sizeof cmd))
975 return -EFAULT;
976
977 INIT_UDATA(&udata, buf + sizeof cmd,
978 (unsigned long) cmd.response + sizeof resp,
979 in_len - sizeof cmd, out_len - sizeof resp);
980
981 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
982 return -EINVAL;
983
984 ret = ib_check_mr_access(cmd.access_flags);
985 if (ret)
986 return ret;
987
988 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
989 if (!uobj)
990 return -ENOMEM;
991
992 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
993 down_write(&uobj->mutex);
994
995 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
996 if (!pd) {
997 ret = -EINVAL;
998 goto err_free;
999 }
1000
1001 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
1002 if (!(pd->device->attrs.device_cap_flags &
1003 IB_DEVICE_ON_DEMAND_PAGING)) {
1004 pr_debug("ODP support not available\n");
1005 ret = -EINVAL;
1006 goto err_put;
1007 }
1008 }
1009
1010 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
1011 cmd.access_flags, &udata);
1012 if (IS_ERR(mr)) {
1013 ret = PTR_ERR(mr);
1014 goto err_put;
1015 }
1016
1017 mr->device = pd->device;
1018 mr->pd = pd;
1019 mr->uobject = uobj;
1020 atomic_inc(&pd->usecnt);
1021
1022 uobj->object = mr;
1023 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
1024 if (ret)
1025 goto err_unreg;
1026
1027 memset(&resp, 0, sizeof resp);
1028 resp.lkey = mr->lkey;
1029 resp.rkey = mr->rkey;
1030 resp.mr_handle = uobj->id;
1031
1032 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1033 &resp, sizeof resp)) {
1034 ret = -EFAULT;
1035 goto err_copy;
1036 }
1037
1038 put_pd_read(pd);
1039
1040 mutex_lock(&file->mutex);
1041 list_add_tail(&uobj->list, &file->ucontext->mr_list);
1042 mutex_unlock(&file->mutex);
1043
1044 uobj->live = 1;
1045
1046 up_write(&uobj->mutex);
1047
1048 return in_len;
1049
1050 err_copy:
1051 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1052
1053 err_unreg:
1054 ib_dereg_mr(mr);
1055
1056 err_put:
1057 put_pd_read(pd);
1058
1059 err_free:
1060 put_uobj_write(uobj);
1061 return ret;
1062 }
1063
1064 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
1065 struct ib_device *ib_dev,
1066 const char __user *buf, int in_len,
1067 int out_len)
1068 {
1069 struct ib_uverbs_rereg_mr cmd;
1070 struct ib_uverbs_rereg_mr_resp resp;
1071 struct ib_udata udata;
1072 struct ib_pd *pd = NULL;
1073 struct ib_mr *mr;
1074 struct ib_pd *old_pd;
1075 int ret;
1076 struct ib_uobject *uobj;
1077
1078 if (out_len < sizeof(resp))
1079 return -ENOSPC;
1080
1081 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1082 return -EFAULT;
1083
1084 INIT_UDATA(&udata, buf + sizeof(cmd),
1085 (unsigned long) cmd.response + sizeof(resp),
1086 in_len - sizeof(cmd), out_len - sizeof(resp));
1087
1088 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
1089 return -EINVAL;
1090
1091 if ((cmd.flags & IB_MR_REREG_TRANS) &&
1092 (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
1093 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
1094 return -EINVAL;
1095
1096 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle,
1097 file->ucontext);
1098
1099 if (!uobj)
1100 return -EINVAL;
1101
1102 mr = uobj->object;
1103
1104 if (cmd.flags & IB_MR_REREG_ACCESS) {
1105 ret = ib_check_mr_access(cmd.access_flags);
1106 if (ret)
1107 goto put_uobjs;
1108 }
1109
1110 if (cmd.flags & IB_MR_REREG_PD) {
1111 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1112 if (!pd) {
1113 ret = -EINVAL;
1114 goto put_uobjs;
1115 }
1116 }
1117
1118 old_pd = mr->pd;
1119 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
1120 cmd.length, cmd.hca_va,
1121 cmd.access_flags, pd, &udata);
1122 if (!ret) {
1123 if (cmd.flags & IB_MR_REREG_PD) {
1124 atomic_inc(&pd->usecnt);
1125 mr->pd = pd;
1126 atomic_dec(&old_pd->usecnt);
1127 }
1128 } else {
1129 goto put_uobj_pd;
1130 }
1131
1132 memset(&resp, 0, sizeof(resp));
1133 resp.lkey = mr->lkey;
1134 resp.rkey = mr->rkey;
1135
1136 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1137 &resp, sizeof(resp)))
1138 ret = -EFAULT;
1139 else
1140 ret = in_len;
1141
1142 put_uobj_pd:
1143 if (cmd.flags & IB_MR_REREG_PD)
1144 put_pd_read(pd);
1145
1146 put_uobjs:
1147
1148 put_uobj_write(mr->uobject);
1149
1150 return ret;
1151 }
1152
1153 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1154 struct ib_device *ib_dev,
1155 const char __user *buf, int in_len,
1156 int out_len)
1157 {
1158 struct ib_uverbs_dereg_mr cmd;
1159 struct ib_mr *mr;
1160 struct ib_uobject *uobj;
1161 int ret = -EINVAL;
1162
1163 if (copy_from_user(&cmd, buf, sizeof cmd))
1164 return -EFAULT;
1165
1166 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1167 if (!uobj)
1168 return -EINVAL;
1169
1170 mr = uobj->object;
1171
1172 ret = ib_dereg_mr(mr);
1173 if (!ret)
1174 uobj->live = 0;
1175
1176 put_uobj_write(uobj);
1177
1178 if (ret)
1179 return ret;
1180
1181 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1182
1183 mutex_lock(&file->mutex);
1184 list_del(&uobj->list);
1185 mutex_unlock(&file->mutex);
1186
1187 put_uobj(uobj);
1188
1189 return in_len;
1190 }
1191
1192 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
1193 struct ib_device *ib_dev,
1194 const char __user *buf, int in_len,
1195 int out_len)
1196 {
1197 struct ib_uverbs_alloc_mw cmd;
1198 struct ib_uverbs_alloc_mw_resp resp;
1199 struct ib_uobject *uobj;
1200 struct ib_pd *pd;
1201 struct ib_mw *mw;
1202 struct ib_udata udata;
1203 int ret;
1204
1205 if (out_len < sizeof(resp))
1206 return -ENOSPC;
1207
1208 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1209 return -EFAULT;
1210
1211 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
1212 if (!uobj)
1213 return -ENOMEM;
1214
1215 init_uobj(uobj, 0, file->ucontext, &mw_lock_class);
1216 down_write(&uobj->mutex);
1217
1218 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1219 if (!pd) {
1220 ret = -EINVAL;
1221 goto err_free;
1222 }
1223
1224 INIT_UDATA(&udata, buf + sizeof(cmd),
1225 (unsigned long)cmd.response + sizeof(resp),
1226 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1227 out_len - sizeof(resp));
1228
1229 mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata);
1230 if (IS_ERR(mw)) {
1231 ret = PTR_ERR(mw);
1232 goto err_put;
1233 }
1234
1235 mw->device = pd->device;
1236 mw->pd = pd;
1237 mw->uobject = uobj;
1238 atomic_inc(&pd->usecnt);
1239
1240 uobj->object = mw;
1241 ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj);
1242 if (ret)
1243 goto err_unalloc;
1244
1245 memset(&resp, 0, sizeof(resp));
1246 resp.rkey = mw->rkey;
1247 resp.mw_handle = uobj->id;
1248
1249 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1250 &resp, sizeof(resp))) {
1251 ret = -EFAULT;
1252 goto err_copy;
1253 }
1254
1255 put_pd_read(pd);
1256
1257 mutex_lock(&file->mutex);
1258 list_add_tail(&uobj->list, &file->ucontext->mw_list);
1259 mutex_unlock(&file->mutex);
1260
1261 uobj->live = 1;
1262
1263 up_write(&uobj->mutex);
1264
1265 return in_len;
1266
1267 err_copy:
1268 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1269
1270 err_unalloc:
1271 uverbs_dealloc_mw(mw);
1272
1273 err_put:
1274 put_pd_read(pd);
1275
1276 err_free:
1277 put_uobj_write(uobj);
1278 return ret;
1279 }
1280
1281 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
1282 struct ib_device *ib_dev,
1283 const char __user *buf, int in_len,
1284 int out_len)
1285 {
1286 struct ib_uverbs_dealloc_mw cmd;
1287 struct ib_mw *mw;
1288 struct ib_uobject *uobj;
1289 int ret = -EINVAL;
1290
1291 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1292 return -EFAULT;
1293
1294 uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext);
1295 if (!uobj)
1296 return -EINVAL;
1297
1298 mw = uobj->object;
1299
1300 ret = uverbs_dealloc_mw(mw);
1301 if (!ret)
1302 uobj->live = 0;
1303
1304 put_uobj_write(uobj);
1305
1306 if (ret)
1307 return ret;
1308
1309 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1310
1311 mutex_lock(&file->mutex);
1312 list_del(&uobj->list);
1313 mutex_unlock(&file->mutex);
1314
1315 put_uobj(uobj);
1316
1317 return in_len;
1318 }
1319
1320 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1321 struct ib_device *ib_dev,
1322 const char __user *buf, int in_len,
1323 int out_len)
1324 {
1325 struct ib_uverbs_create_comp_channel cmd;
1326 struct ib_uverbs_create_comp_channel_resp resp;
1327 struct file *filp;
1328 int ret;
1329
1330 if (out_len < sizeof resp)
1331 return -ENOSPC;
1332
1333 if (copy_from_user(&cmd, buf, sizeof cmd))
1334 return -EFAULT;
1335
1336 ret = get_unused_fd_flags(O_CLOEXEC);
1337 if (ret < 0)
1338 return ret;
1339 resp.fd = ret;
1340
1341 filp = ib_uverbs_alloc_event_file(file, ib_dev, 0);
1342 if (IS_ERR(filp)) {
1343 put_unused_fd(resp.fd);
1344 return PTR_ERR(filp);
1345 }
1346
1347 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1348 &resp, sizeof resp)) {
1349 put_unused_fd(resp.fd);
1350 fput(filp);
1351 return -EFAULT;
1352 }
1353
1354 fd_install(resp.fd, filp);
1355 return in_len;
1356 }
1357
1358 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
1359 struct ib_device *ib_dev,
1360 struct ib_udata *ucore,
1361 struct ib_udata *uhw,
1362 struct ib_uverbs_ex_create_cq *cmd,
1363 size_t cmd_sz,
1364 int (*cb)(struct ib_uverbs_file *file,
1365 struct ib_ucq_object *obj,
1366 struct ib_uverbs_ex_create_cq_resp *resp,
1367 struct ib_udata *udata,
1368 void *context),
1369 void *context)
1370 {
1371 struct ib_ucq_object *obj;
1372 struct ib_uverbs_event_file *ev_file = NULL;
1373 struct ib_cq *cq;
1374 int ret;
1375 struct ib_uverbs_ex_create_cq_resp resp;
1376 struct ib_cq_init_attr attr = {};
1377
1378 if (cmd->comp_vector >= file->device->num_comp_vectors)
1379 return ERR_PTR(-EINVAL);
1380
1381 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1382 if (!obj)
1383 return ERR_PTR(-ENOMEM);
1384
1385 init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class);
1386 down_write(&obj->uobject.mutex);
1387
1388 if (cmd->comp_channel >= 0) {
1389 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel);
1390 if (!ev_file) {
1391 ret = -EINVAL;
1392 goto err;
1393 }
1394 }
1395
1396 obj->uverbs_file = file;
1397 obj->comp_events_reported = 0;
1398 obj->async_events_reported = 0;
1399 INIT_LIST_HEAD(&obj->comp_list);
1400 INIT_LIST_HEAD(&obj->async_list);
1401
1402 attr.cqe = cmd->cqe;
1403 attr.comp_vector = cmd->comp_vector;
1404
1405 if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1406 attr.flags = cmd->flags;
1407
1408 cq = ib_dev->create_cq(ib_dev, &attr,
1409 file->ucontext, uhw);
1410 if (IS_ERR(cq)) {
1411 ret = PTR_ERR(cq);
1412 goto err_file;
1413 }
1414
1415 cq->device = ib_dev;
1416 cq->uobject = &obj->uobject;
1417 cq->comp_handler = ib_uverbs_comp_handler;
1418 cq->event_handler = ib_uverbs_cq_event_handler;
1419 cq->cq_context = ev_file;
1420 atomic_set(&cq->usecnt, 0);
1421
1422 obj->uobject.object = cq;
1423 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1424 if (ret)
1425 goto err_free;
1426
1427 memset(&resp, 0, sizeof resp);
1428 resp.base.cq_handle = obj->uobject.id;
1429 resp.base.cqe = cq->cqe;
1430
1431 resp.response_length = offsetof(typeof(resp), response_length) +
1432 sizeof(resp.response_length);
1433
1434 ret = cb(file, obj, &resp, ucore, context);
1435 if (ret)
1436 goto err_cb;
1437
1438 mutex_lock(&file->mutex);
1439 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1440 mutex_unlock(&file->mutex);
1441
1442 obj->uobject.live = 1;
1443
1444 up_write(&obj->uobject.mutex);
1445
1446 return obj;
1447
1448 err_cb:
1449 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1450
1451 err_free:
1452 ib_destroy_cq(cq);
1453
1454 err_file:
1455 if (ev_file)
1456 ib_uverbs_release_ucq(file, ev_file, obj);
1457
1458 err:
1459 put_uobj_write(&obj->uobject);
1460
1461 return ERR_PTR(ret);
1462 }
1463
1464 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1465 struct ib_ucq_object *obj,
1466 struct ib_uverbs_ex_create_cq_resp *resp,
1467 struct ib_udata *ucore, void *context)
1468 {
1469 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1470 return -EFAULT;
1471
1472 return 0;
1473 }
1474
1475 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1476 struct ib_device *ib_dev,
1477 const char __user *buf, int in_len,
1478 int out_len)
1479 {
1480 struct ib_uverbs_create_cq cmd;
1481 struct ib_uverbs_ex_create_cq cmd_ex;
1482 struct ib_uverbs_create_cq_resp resp;
1483 struct ib_udata ucore;
1484 struct ib_udata uhw;
1485 struct ib_ucq_object *obj;
1486
1487 if (out_len < sizeof(resp))
1488 return -ENOSPC;
1489
1490 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1491 return -EFAULT;
1492
1493 INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd), sizeof(resp));
1494
1495 INIT_UDATA(&uhw, buf + sizeof(cmd),
1496 (unsigned long)cmd.response + sizeof(resp),
1497 in_len - sizeof(cmd), out_len - sizeof(resp));
1498
1499 memset(&cmd_ex, 0, sizeof(cmd_ex));
1500 cmd_ex.user_handle = cmd.user_handle;
1501 cmd_ex.cqe = cmd.cqe;
1502 cmd_ex.comp_vector = cmd.comp_vector;
1503 cmd_ex.comp_channel = cmd.comp_channel;
1504
1505 obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1506 offsetof(typeof(cmd_ex), comp_channel) +
1507 sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1508 NULL);
1509
1510 if (IS_ERR(obj))
1511 return PTR_ERR(obj);
1512
1513 return in_len;
1514 }
1515
1516 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1517 struct ib_ucq_object *obj,
1518 struct ib_uverbs_ex_create_cq_resp *resp,
1519 struct ib_udata *ucore, void *context)
1520 {
1521 if (ib_copy_to_udata(ucore, resp, resp->response_length))
1522 return -EFAULT;
1523
1524 return 0;
1525 }
1526
1527 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1528 struct ib_device *ib_dev,
1529 struct ib_udata *ucore,
1530 struct ib_udata *uhw)
1531 {
1532 struct ib_uverbs_ex_create_cq_resp resp;
1533 struct ib_uverbs_ex_create_cq cmd;
1534 struct ib_ucq_object *obj;
1535 int err;
1536
1537 if (ucore->inlen < sizeof(cmd))
1538 return -EINVAL;
1539
1540 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1541 if (err)
1542 return err;
1543
1544 if (cmd.comp_mask)
1545 return -EINVAL;
1546
1547 if (cmd.reserved)
1548 return -EINVAL;
1549
1550 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1551 sizeof(resp.response_length)))
1552 return -ENOSPC;
1553
1554 obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1555 min(ucore->inlen, sizeof(cmd)),
1556 ib_uverbs_ex_create_cq_cb, NULL);
1557
1558 if (IS_ERR(obj))
1559 return PTR_ERR(obj);
1560
1561 return 0;
1562 }
1563
1564 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1565 struct ib_device *ib_dev,
1566 const char __user *buf, int in_len,
1567 int out_len)
1568 {
1569 struct ib_uverbs_resize_cq cmd;
1570 struct ib_uverbs_resize_cq_resp resp;
1571 struct ib_udata udata;
1572 struct ib_cq *cq;
1573 int ret = -EINVAL;
1574
1575 if (copy_from_user(&cmd, buf, sizeof cmd))
1576 return -EFAULT;
1577
1578 INIT_UDATA(&udata, buf + sizeof cmd,
1579 (unsigned long) cmd.response + sizeof resp,
1580 in_len - sizeof cmd, out_len - sizeof resp);
1581
1582 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1583 if (!cq)
1584 return -EINVAL;
1585
1586 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1587 if (ret)
1588 goto out;
1589
1590 resp.cqe = cq->cqe;
1591
1592 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1593 &resp, sizeof resp.cqe))
1594 ret = -EFAULT;
1595
1596 out:
1597 put_cq_read(cq);
1598
1599 return ret ? ret : in_len;
1600 }
1601
1602 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1603 {
1604 struct ib_uverbs_wc tmp;
1605
1606 tmp.wr_id = wc->wr_id;
1607 tmp.status = wc->status;
1608 tmp.opcode = wc->opcode;
1609 tmp.vendor_err = wc->vendor_err;
1610 tmp.byte_len = wc->byte_len;
1611 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1612 tmp.qp_num = wc->qp->qp_num;
1613 tmp.src_qp = wc->src_qp;
1614 tmp.wc_flags = wc->wc_flags;
1615 tmp.pkey_index = wc->pkey_index;
1616 tmp.slid = wc->slid;
1617 tmp.sl = wc->sl;
1618 tmp.dlid_path_bits = wc->dlid_path_bits;
1619 tmp.port_num = wc->port_num;
1620 tmp.reserved = 0;
1621
1622 if (copy_to_user(dest, &tmp, sizeof tmp))
1623 return -EFAULT;
1624
1625 return 0;
1626 }
1627
1628 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1629 struct ib_device *ib_dev,
1630 const char __user *buf, int in_len,
1631 int out_len)
1632 {
1633 struct ib_uverbs_poll_cq cmd;
1634 struct ib_uverbs_poll_cq_resp resp;
1635 u8 __user *header_ptr;
1636 u8 __user *data_ptr;
1637 struct ib_cq *cq;
1638 struct ib_wc wc;
1639 int ret;
1640
1641 if (copy_from_user(&cmd, buf, sizeof cmd))
1642 return -EFAULT;
1643
1644 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1645 if (!cq)
1646 return -EINVAL;
1647
1648 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1649 header_ptr = (void __user *)(unsigned long) cmd.response;
1650 data_ptr = header_ptr + sizeof resp;
1651
1652 memset(&resp, 0, sizeof resp);
1653 while (resp.count < cmd.ne) {
1654 ret = ib_poll_cq(cq, 1, &wc);
1655 if (ret < 0)
1656 goto out_put;
1657 if (!ret)
1658 break;
1659
1660 ret = copy_wc_to_user(data_ptr, &wc);
1661 if (ret)
1662 goto out_put;
1663
1664 data_ptr += sizeof(struct ib_uverbs_wc);
1665 ++resp.count;
1666 }
1667
1668 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1669 ret = -EFAULT;
1670 goto out_put;
1671 }
1672
1673 ret = in_len;
1674
1675 out_put:
1676 put_cq_read(cq);
1677 return ret;
1678 }
1679
1680 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1681 struct ib_device *ib_dev,
1682 const char __user *buf, int in_len,
1683 int out_len)
1684 {
1685 struct ib_uverbs_req_notify_cq cmd;
1686 struct ib_cq *cq;
1687
1688 if (copy_from_user(&cmd, buf, sizeof cmd))
1689 return -EFAULT;
1690
1691 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1692 if (!cq)
1693 return -EINVAL;
1694
1695 ib_req_notify_cq(cq, cmd.solicited_only ?
1696 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1697
1698 put_cq_read(cq);
1699
1700 return in_len;
1701 }
1702
1703 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1704 struct ib_device *ib_dev,
1705 const char __user *buf, int in_len,
1706 int out_len)
1707 {
1708 struct ib_uverbs_destroy_cq cmd;
1709 struct ib_uverbs_destroy_cq_resp resp;
1710 struct ib_uobject *uobj;
1711 struct ib_cq *cq;
1712 struct ib_ucq_object *obj;
1713 struct ib_uverbs_event_file *ev_file;
1714 int ret = -EINVAL;
1715
1716 if (copy_from_user(&cmd, buf, sizeof cmd))
1717 return -EFAULT;
1718
1719 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1720 if (!uobj)
1721 return -EINVAL;
1722 cq = uobj->object;
1723 ev_file = cq->cq_context;
1724 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1725
1726 ret = ib_destroy_cq(cq);
1727 if (!ret)
1728 uobj->live = 0;
1729
1730 put_uobj_write(uobj);
1731
1732 if (ret)
1733 return ret;
1734
1735 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1736
1737 mutex_lock(&file->mutex);
1738 list_del(&uobj->list);
1739 mutex_unlock(&file->mutex);
1740
1741 ib_uverbs_release_ucq(file, ev_file, obj);
1742
1743 memset(&resp, 0, sizeof resp);
1744 resp.comp_events_reported = obj->comp_events_reported;
1745 resp.async_events_reported = obj->async_events_reported;
1746
1747 put_uobj(uobj);
1748
1749 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1750 &resp, sizeof resp))
1751 return -EFAULT;
1752
1753 return in_len;
1754 }
1755
1756 static int create_qp(struct ib_uverbs_file *file,
1757 struct ib_udata *ucore,
1758 struct ib_udata *uhw,
1759 struct ib_uverbs_ex_create_qp *cmd,
1760 size_t cmd_sz,
1761 int (*cb)(struct ib_uverbs_file *file,
1762 struct ib_uverbs_ex_create_qp_resp *resp,
1763 struct ib_udata *udata),
1764 void *context)
1765 {
1766 struct ib_uqp_object *obj;
1767 struct ib_device *device;
1768 struct ib_pd *pd = NULL;
1769 struct ib_xrcd *xrcd = NULL;
1770 struct ib_uobject *uninitialized_var(xrcd_uobj);
1771 struct ib_cq *scq = NULL, *rcq = NULL;
1772 struct ib_srq *srq = NULL;
1773 struct ib_qp *qp;
1774 char *buf;
1775 struct ib_qp_init_attr attr = {};
1776 struct ib_uverbs_ex_create_qp_resp resp;
1777 int ret;
1778 struct ib_rwq_ind_table *ind_tbl = NULL;
1779 bool has_sq = true;
1780
1781 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1782 return -EPERM;
1783
1784 obj = kzalloc(sizeof *obj, GFP_KERNEL);
1785 if (!obj)
1786 return -ENOMEM;
1787
1788 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext,
1789 &qp_lock_class);
1790 down_write(&obj->uevent.uobject.mutex);
1791 if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1792 sizeof(cmd->rwq_ind_tbl_handle) &&
1793 (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1794 ind_tbl = idr_read_rwq_indirection_table(cmd->rwq_ind_tbl_handle,
1795 file->ucontext);
1796 if (!ind_tbl) {
1797 ret = -EINVAL;
1798 goto err_put;
1799 }
1800
1801 attr.rwq_ind_tbl = ind_tbl;
1802 }
1803
1804 if ((cmd_sz >= offsetof(typeof(*cmd), reserved1) +
1805 sizeof(cmd->reserved1)) && cmd->reserved1) {
1806 ret = -EOPNOTSUPP;
1807 goto err_put;
1808 }
1809
1810 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1811 ret = -EINVAL;
1812 goto err_put;
1813 }
1814
1815 if (ind_tbl && !cmd->max_send_wr)
1816 has_sq = false;
1817
1818 if (cmd->qp_type == IB_QPT_XRC_TGT) {
1819 xrcd = idr_read_xrcd(cmd->pd_handle, file->ucontext,
1820 &xrcd_uobj);
1821 if (!xrcd) {
1822 ret = -EINVAL;
1823 goto err_put;
1824 }
1825 device = xrcd->device;
1826 } else {
1827 if (cmd->qp_type == IB_QPT_XRC_INI) {
1828 cmd->max_recv_wr = 0;
1829 cmd->max_recv_sge = 0;
1830 } else {
1831 if (cmd->is_srq) {
1832 srq = idr_read_srq(cmd->srq_handle,
1833 file->ucontext);
1834 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1835 ret = -EINVAL;
1836 goto err_put;
1837 }
1838 }
1839
1840 if (!ind_tbl) {
1841 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1842 rcq = idr_read_cq(cmd->recv_cq_handle,
1843 file->ucontext, 0);
1844 if (!rcq) {
1845 ret = -EINVAL;
1846 goto err_put;
1847 }
1848 }
1849 }
1850 }
1851
1852 if (has_sq)
1853 scq = idr_read_cq(cmd->send_cq_handle, file->ucontext, !!rcq);
1854 if (!ind_tbl)
1855 rcq = rcq ?: scq;
1856 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
1857 if (!pd || (!scq && has_sq)) {
1858 ret = -EINVAL;
1859 goto err_put;
1860 }
1861
1862 device = pd->device;
1863 }
1864
1865 attr.event_handler = ib_uverbs_qp_event_handler;
1866 attr.qp_context = file;
1867 attr.send_cq = scq;
1868 attr.recv_cq = rcq;
1869 attr.srq = srq;
1870 attr.xrcd = xrcd;
1871 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1872 IB_SIGNAL_REQ_WR;
1873 attr.qp_type = cmd->qp_type;
1874 attr.create_flags = 0;
1875
1876 attr.cap.max_send_wr = cmd->max_send_wr;
1877 attr.cap.max_recv_wr = cmd->max_recv_wr;
1878 attr.cap.max_send_sge = cmd->max_send_sge;
1879 attr.cap.max_recv_sge = cmd->max_recv_sge;
1880 attr.cap.max_inline_data = cmd->max_inline_data;
1881
1882 obj->uevent.events_reported = 0;
1883 INIT_LIST_HEAD(&obj->uevent.event_list);
1884 INIT_LIST_HEAD(&obj->mcast_list);
1885
1886 if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1887 sizeof(cmd->create_flags))
1888 attr.create_flags = cmd->create_flags;
1889
1890 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1891 IB_QP_CREATE_CROSS_CHANNEL |
1892 IB_QP_CREATE_MANAGED_SEND |
1893 IB_QP_CREATE_MANAGED_RECV |
1894 IB_QP_CREATE_SCATTER_FCS)) {
1895 ret = -EINVAL;
1896 goto err_put;
1897 }
1898
1899 buf = (void *)cmd + sizeof(*cmd);
1900 if (cmd_sz > sizeof(*cmd))
1901 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1902 cmd_sz - sizeof(*cmd) - 1))) {
1903 ret = -EINVAL;
1904 goto err_put;
1905 }
1906
1907 if (cmd->qp_type == IB_QPT_XRC_TGT)
1908 qp = ib_create_qp(pd, &attr);
1909 else
1910 qp = device->create_qp(pd, &attr, uhw);
1911
1912 if (IS_ERR(qp)) {
1913 ret = PTR_ERR(qp);
1914 goto err_put;
1915 }
1916
1917 if (cmd->qp_type != IB_QPT_XRC_TGT) {
1918 qp->real_qp = qp;
1919 qp->device = device;
1920 qp->pd = pd;
1921 qp->send_cq = attr.send_cq;
1922 qp->recv_cq = attr.recv_cq;
1923 qp->srq = attr.srq;
1924 qp->rwq_ind_tbl = ind_tbl;
1925 qp->event_handler = attr.event_handler;
1926 qp->qp_context = attr.qp_context;
1927 qp->qp_type = attr.qp_type;
1928 atomic_set(&qp->usecnt, 0);
1929 atomic_inc(&pd->usecnt);
1930 if (attr.send_cq)
1931 atomic_inc(&attr.send_cq->usecnt);
1932 if (attr.recv_cq)
1933 atomic_inc(&attr.recv_cq->usecnt);
1934 if (attr.srq)
1935 atomic_inc(&attr.srq->usecnt);
1936 if (ind_tbl)
1937 atomic_inc(&ind_tbl->usecnt);
1938 }
1939 qp->uobject = &obj->uevent.uobject;
1940
1941 obj->uevent.uobject.object = qp;
1942 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1943 if (ret)
1944 goto err_destroy;
1945
1946 memset(&resp, 0, sizeof resp);
1947 resp.base.qpn = qp->qp_num;
1948 resp.base.qp_handle = obj->uevent.uobject.id;
1949 resp.base.max_recv_sge = attr.cap.max_recv_sge;
1950 resp.base.max_send_sge = attr.cap.max_send_sge;
1951 resp.base.max_recv_wr = attr.cap.max_recv_wr;
1952 resp.base.max_send_wr = attr.cap.max_send_wr;
1953 resp.base.max_inline_data = attr.cap.max_inline_data;
1954
1955 resp.response_length = offsetof(typeof(resp), response_length) +
1956 sizeof(resp.response_length);
1957
1958 ret = cb(file, &resp, ucore);
1959 if (ret)
1960 goto err_cb;
1961
1962 if (xrcd) {
1963 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1964 uobject);
1965 atomic_inc(&obj->uxrcd->refcnt);
1966 put_xrcd_read(xrcd_uobj);
1967 }
1968
1969 if (pd)
1970 put_pd_read(pd);
1971 if (scq)
1972 put_cq_read(scq);
1973 if (rcq && rcq != scq)
1974 put_cq_read(rcq);
1975 if (srq)
1976 put_srq_read(srq);
1977 if (ind_tbl)
1978 put_rwq_indirection_table_read(ind_tbl);
1979
1980 mutex_lock(&file->mutex);
1981 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1982 mutex_unlock(&file->mutex);
1983
1984 obj->uevent.uobject.live = 1;
1985
1986 up_write(&obj->uevent.uobject.mutex);
1987
1988 return 0;
1989 err_cb:
1990 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1991
1992 err_destroy:
1993 ib_destroy_qp(qp);
1994
1995 err_put:
1996 if (xrcd)
1997 put_xrcd_read(xrcd_uobj);
1998 if (pd)
1999 put_pd_read(pd);
2000 if (scq)
2001 put_cq_read(scq);
2002 if (rcq && rcq != scq)
2003 put_cq_read(rcq);
2004 if (srq)
2005 put_srq_read(srq);
2006 if (ind_tbl)
2007 put_rwq_indirection_table_read(ind_tbl);
2008
2009 put_uobj_write(&obj->uevent.uobject);
2010 return ret;
2011 }
2012
2013 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
2014 struct ib_uverbs_ex_create_qp_resp *resp,
2015 struct ib_udata *ucore)
2016 {
2017 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
2018 return -EFAULT;
2019
2020 return 0;
2021 }
2022
2023 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
2024 struct ib_device *ib_dev,
2025 const char __user *buf, int in_len,
2026 int out_len)
2027 {
2028 struct ib_uverbs_create_qp cmd;
2029 struct ib_uverbs_ex_create_qp cmd_ex;
2030 struct ib_udata ucore;
2031 struct ib_udata uhw;
2032 ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
2033 int err;
2034
2035 if (out_len < resp_size)
2036 return -ENOSPC;
2037
2038 if (copy_from_user(&cmd, buf, sizeof(cmd)))
2039 return -EFAULT;
2040
2041 INIT_UDATA(&ucore, buf, (unsigned long)cmd.response, sizeof(cmd),
2042 resp_size);
2043 INIT_UDATA(&uhw, buf + sizeof(cmd),
2044 (unsigned long)cmd.response + resp_size,
2045 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
2046 out_len - resp_size);
2047
2048 memset(&cmd_ex, 0, sizeof(cmd_ex));
2049 cmd_ex.user_handle = cmd.user_handle;
2050 cmd_ex.pd_handle = cmd.pd_handle;
2051 cmd_ex.send_cq_handle = cmd.send_cq_handle;
2052 cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
2053 cmd_ex.srq_handle = cmd.srq_handle;
2054 cmd_ex.max_send_wr = cmd.max_send_wr;
2055 cmd_ex.max_recv_wr = cmd.max_recv_wr;
2056 cmd_ex.max_send_sge = cmd.max_send_sge;
2057 cmd_ex.max_recv_sge = cmd.max_recv_sge;
2058 cmd_ex.max_inline_data = cmd.max_inline_data;
2059 cmd_ex.sq_sig_all = cmd.sq_sig_all;
2060 cmd_ex.qp_type = cmd.qp_type;
2061 cmd_ex.is_srq = cmd.is_srq;
2062
2063 err = create_qp(file, &ucore, &uhw, &cmd_ex,
2064 offsetof(typeof(cmd_ex), is_srq) +
2065 sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
2066 NULL);
2067
2068 if (err)
2069 return err;
2070
2071 return in_len;
2072 }
2073
2074 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
2075 struct ib_uverbs_ex_create_qp_resp *resp,
2076 struct ib_udata *ucore)
2077 {
2078 if (ib_copy_to_udata(ucore, resp, resp->response_length))
2079 return -EFAULT;
2080
2081 return 0;
2082 }
2083
2084 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
2085 struct ib_device *ib_dev,
2086 struct ib_udata *ucore,
2087 struct ib_udata *uhw)
2088 {
2089 struct ib_uverbs_ex_create_qp_resp resp;
2090 struct ib_uverbs_ex_create_qp cmd = {0};
2091 int err;
2092
2093 if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
2094 sizeof(cmd.comp_mask)))
2095 return -EINVAL;
2096
2097 err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2098 if (err)
2099 return err;
2100
2101 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
2102 return -EINVAL;
2103
2104 if (cmd.reserved)
2105 return -EINVAL;
2106
2107 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
2108 sizeof(resp.response_length)))
2109 return -ENOSPC;
2110
2111 err = create_qp(file, ucore, uhw, &cmd,
2112 min(ucore->inlen, sizeof(cmd)),
2113 ib_uverbs_ex_create_qp_cb, NULL);
2114
2115 if (err)
2116 return err;
2117
2118 return 0;
2119 }
2120
2121 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
2122 struct ib_device *ib_dev,
2123 const char __user *buf, int in_len, int out_len)
2124 {
2125 struct ib_uverbs_open_qp cmd;
2126 struct ib_uverbs_create_qp_resp resp;
2127 struct ib_udata udata;
2128 struct ib_uqp_object *obj;
2129 struct ib_xrcd *xrcd;
2130 struct ib_uobject *uninitialized_var(xrcd_uobj);
2131 struct ib_qp *qp;
2132 struct ib_qp_open_attr attr;
2133 int ret;
2134
2135 if (out_len < sizeof resp)
2136 return -ENOSPC;
2137
2138 if (copy_from_user(&cmd, buf, sizeof cmd))
2139 return -EFAULT;
2140
2141 INIT_UDATA(&udata, buf + sizeof cmd,
2142 (unsigned long) cmd.response + sizeof resp,
2143 in_len - sizeof cmd, out_len - sizeof resp);
2144
2145 obj = kmalloc(sizeof *obj, GFP_KERNEL);
2146 if (!obj)
2147 return -ENOMEM;
2148
2149 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
2150 down_write(&obj->uevent.uobject.mutex);
2151
2152 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
2153 if (!xrcd) {
2154 ret = -EINVAL;
2155 goto err_put;
2156 }
2157
2158 attr.event_handler = ib_uverbs_qp_event_handler;
2159 attr.qp_context = file;
2160 attr.qp_num = cmd.qpn;
2161 attr.qp_type = cmd.qp_type;
2162
2163 obj->uevent.events_reported = 0;
2164 INIT_LIST_HEAD(&obj->uevent.event_list);
2165 INIT_LIST_HEAD(&obj->mcast_list);
2166
2167 qp = ib_open_qp(xrcd, &attr);
2168 if (IS_ERR(qp)) {
2169 ret = PTR_ERR(qp);
2170 goto err_put;
2171 }
2172
2173 qp->uobject = &obj->uevent.uobject;
2174
2175 obj->uevent.uobject.object = qp;
2176 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
2177 if (ret)
2178 goto err_destroy;
2179
2180 memset(&resp, 0, sizeof resp);
2181 resp.qpn = qp->qp_num;
2182 resp.qp_handle = obj->uevent.uobject.id;
2183
2184 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2185 &resp, sizeof resp)) {
2186 ret = -EFAULT;
2187 goto err_remove;
2188 }
2189
2190 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2191 atomic_inc(&obj->uxrcd->refcnt);
2192 put_xrcd_read(xrcd_uobj);
2193
2194 mutex_lock(&file->mutex);
2195 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
2196 mutex_unlock(&file->mutex);
2197
2198 obj->uevent.uobject.live = 1;
2199
2200 up_write(&obj->uevent.uobject.mutex);
2201
2202 return in_len;
2203
2204 err_remove:
2205 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
2206
2207 err_destroy:
2208 ib_destroy_qp(qp);
2209
2210 err_put:
2211 put_xrcd_read(xrcd_uobj);
2212 put_uobj_write(&obj->uevent.uobject);
2213 return ret;
2214 }
2215
2216 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
2217 struct ib_device *ib_dev,
2218 const char __user *buf, int in_len,
2219 int out_len)
2220 {
2221 struct ib_uverbs_query_qp cmd;
2222 struct ib_uverbs_query_qp_resp resp;
2223 struct ib_qp *qp;
2224 struct ib_qp_attr *attr;
2225 struct ib_qp_init_attr *init_attr;
2226 int ret;
2227
2228 if (copy_from_user(&cmd, buf, sizeof cmd))
2229 return -EFAULT;
2230
2231 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2232 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
2233 if (!attr || !init_attr) {
2234 ret = -ENOMEM;
2235 goto out;
2236 }
2237
2238 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2239 if (!qp) {
2240 ret = -EINVAL;
2241 goto out;
2242 }
2243
2244 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
2245
2246 put_qp_read(qp);
2247
2248 if (ret)
2249 goto out;
2250
2251 memset(&resp, 0, sizeof resp);
2252
2253 resp.qp_state = attr->qp_state;
2254 resp.cur_qp_state = attr->cur_qp_state;
2255 resp.path_mtu = attr->path_mtu;
2256 resp.path_mig_state = attr->path_mig_state;
2257 resp.qkey = attr->qkey;
2258 resp.rq_psn = attr->rq_psn;
2259 resp.sq_psn = attr->sq_psn;
2260 resp.dest_qp_num = attr->dest_qp_num;
2261 resp.qp_access_flags = attr->qp_access_flags;
2262 resp.pkey_index = attr->pkey_index;
2263 resp.alt_pkey_index = attr->alt_pkey_index;
2264 resp.sq_draining = attr->sq_draining;
2265 resp.max_rd_atomic = attr->max_rd_atomic;
2266 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
2267 resp.min_rnr_timer = attr->min_rnr_timer;
2268 resp.port_num = attr->port_num;
2269 resp.timeout = attr->timeout;
2270 resp.retry_cnt = attr->retry_cnt;
2271 resp.rnr_retry = attr->rnr_retry;
2272 resp.alt_port_num = attr->alt_port_num;
2273 resp.alt_timeout = attr->alt_timeout;
2274
2275 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
2276 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
2277 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
2278 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
2279 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
2280 resp.dest.dlid = attr->ah_attr.dlid;
2281 resp.dest.sl = attr->ah_attr.sl;
2282 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
2283 resp.dest.static_rate = attr->ah_attr.static_rate;
2284 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
2285 resp.dest.port_num = attr->ah_attr.port_num;
2286
2287 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
2288 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
2289 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
2290 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
2291 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
2292 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
2293 resp.alt_dest.sl = attr->alt_ah_attr.sl;
2294 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
2295 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
2296 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
2297 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
2298
2299 resp.max_send_wr = init_attr->cap.max_send_wr;
2300 resp.max_recv_wr = init_attr->cap.max_recv_wr;
2301 resp.max_send_sge = init_attr->cap.max_send_sge;
2302 resp.max_recv_sge = init_attr->cap.max_recv_sge;
2303 resp.max_inline_data = init_attr->cap.max_inline_data;
2304 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
2305
2306 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2307 &resp, sizeof resp))
2308 ret = -EFAULT;
2309
2310 out:
2311 kfree(attr);
2312 kfree(init_attr);
2313
2314 return ret ? ret : in_len;
2315 }
2316
2317 /* Remove ignored fields set in the attribute mask */
2318 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
2319 {
2320 switch (qp_type) {
2321 case IB_QPT_XRC_INI:
2322 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
2323 case IB_QPT_XRC_TGT:
2324 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
2325 IB_QP_RNR_RETRY);
2326 default:
2327 return mask;
2328 }
2329 }
2330
2331 static int modify_qp(struct ib_uverbs_file *file,
2332 struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
2333 {
2334 struct ib_qp_attr *attr;
2335 struct ib_qp *qp;
2336 int ret;
2337
2338 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2339 if (!attr)
2340 return -ENOMEM;
2341
2342 qp = idr_read_qp(cmd->base.qp_handle, file->ucontext);
2343 if (!qp) {
2344 ret = -EINVAL;
2345 goto out;
2346 }
2347
2348 attr->qp_state = cmd->base.qp_state;
2349 attr->cur_qp_state = cmd->base.cur_qp_state;
2350 attr->path_mtu = cmd->base.path_mtu;
2351 attr->path_mig_state = cmd->base.path_mig_state;
2352 attr->qkey = cmd->base.qkey;
2353 attr->rq_psn = cmd->base.rq_psn;
2354 attr->sq_psn = cmd->base.sq_psn;
2355 attr->dest_qp_num = cmd->base.dest_qp_num;
2356 attr->qp_access_flags = cmd->base.qp_access_flags;
2357 attr->pkey_index = cmd->base.pkey_index;
2358 attr->alt_pkey_index = cmd->base.alt_pkey_index;
2359 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
2360 attr->max_rd_atomic = cmd->base.max_rd_atomic;
2361 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
2362 attr->min_rnr_timer = cmd->base.min_rnr_timer;
2363 attr->port_num = cmd->base.port_num;
2364 attr->timeout = cmd->base.timeout;
2365 attr->retry_cnt = cmd->base.retry_cnt;
2366 attr->rnr_retry = cmd->base.rnr_retry;
2367 attr->alt_port_num = cmd->base.alt_port_num;
2368 attr->alt_timeout = cmd->base.alt_timeout;
2369 attr->rate_limit = cmd->rate_limit;
2370
2371 memcpy(attr->ah_attr.grh.dgid.raw, cmd->base.dest.dgid, 16);
2372 attr->ah_attr.grh.flow_label = cmd->base.dest.flow_label;
2373 attr->ah_attr.grh.sgid_index = cmd->base.dest.sgid_index;
2374 attr->ah_attr.grh.hop_limit = cmd->base.dest.hop_limit;
2375 attr->ah_attr.grh.traffic_class = cmd->base.dest.traffic_class;
2376 attr->ah_attr.dlid = cmd->base.dest.dlid;
2377 attr->ah_attr.sl = cmd->base.dest.sl;
2378 attr->ah_attr.src_path_bits = cmd->base.dest.src_path_bits;
2379 attr->ah_attr.static_rate = cmd->base.dest.static_rate;
2380 attr->ah_attr.ah_flags = cmd->base.dest.is_global ?
2381 IB_AH_GRH : 0;
2382 attr->ah_attr.port_num = cmd->base.dest.port_num;
2383
2384 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd->base.alt_dest.dgid, 16);
2385 attr->alt_ah_attr.grh.flow_label = cmd->base.alt_dest.flow_label;
2386 attr->alt_ah_attr.grh.sgid_index = cmd->base.alt_dest.sgid_index;
2387 attr->alt_ah_attr.grh.hop_limit = cmd->base.alt_dest.hop_limit;
2388 attr->alt_ah_attr.grh.traffic_class = cmd->base.alt_dest.traffic_class;
2389 attr->alt_ah_attr.dlid = cmd->base.alt_dest.dlid;
2390 attr->alt_ah_attr.sl = cmd->base.alt_dest.sl;
2391 attr->alt_ah_attr.src_path_bits = cmd->base.alt_dest.src_path_bits;
2392 attr->alt_ah_attr.static_rate = cmd->base.alt_dest.static_rate;
2393 attr->alt_ah_attr.ah_flags = cmd->base.alt_dest.is_global ?
2394 IB_AH_GRH : 0;
2395 attr->alt_ah_attr.port_num = cmd->base.alt_dest.port_num;
2396
2397 if (qp->real_qp == qp) {
2398 if (cmd->base.attr_mask & IB_QP_AV) {
2399 ret = ib_resolve_eth_dmac(qp->device, &attr->ah_attr);
2400 if (ret)
2401 goto release_qp;
2402 }
2403 ret = qp->device->modify_qp(qp, attr,
2404 modify_qp_mask(qp->qp_type,
2405 cmd->base.attr_mask),
2406 udata);
2407 } else {
2408 ret = ib_modify_qp(qp, attr,
2409 modify_qp_mask(qp->qp_type,
2410 cmd->base.attr_mask));
2411 }
2412
2413 release_qp:
2414 put_qp_read(qp);
2415
2416 out:
2417 kfree(attr);
2418
2419 return ret;
2420 }
2421
2422 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2423 struct ib_device *ib_dev,
2424 const char __user *buf, int in_len,
2425 int out_len)
2426 {
2427 struct ib_uverbs_ex_modify_qp cmd = {};
2428 struct ib_udata udata;
2429 int ret;
2430
2431 if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2432 return -EFAULT;
2433
2434 if (cmd.base.attr_mask &
2435 ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2436 return -EOPNOTSUPP;
2437
2438 INIT_UDATA(&udata, buf + sizeof(cmd.base), NULL,
2439 in_len - sizeof(cmd.base), out_len);
2440
2441 ret = modify_qp(file, &cmd, &udata);
2442 if (ret)
2443 return ret;
2444
2445 return in_len;
2446 }
2447
2448 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2449 struct ib_device *ib_dev,
2450 struct ib_udata *ucore,
2451 struct ib_udata *uhw)
2452 {
2453 struct ib_uverbs_ex_modify_qp cmd = {};
2454 int ret;
2455
2456 /*
2457 * Last bit is reserved for extending the attr_mask by
2458 * using another field.
2459 */
2460 BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2461
2462 if (ucore->inlen < sizeof(cmd.base))
2463 return -EINVAL;
2464
2465 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2466 if (ret)
2467 return ret;
2468
2469 if (cmd.base.attr_mask &
2470 ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2471 return -EOPNOTSUPP;
2472
2473 if (ucore->inlen > sizeof(cmd)) {
2474 if (ib_is_udata_cleared(ucore, sizeof(cmd),
2475 ucore->inlen - sizeof(cmd)))
2476 return -EOPNOTSUPP;
2477 }
2478
2479 ret = modify_qp(file, &cmd, uhw);
2480
2481 return ret;
2482 }
2483
2484 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2485 struct ib_device *ib_dev,
2486 const char __user *buf, int in_len,
2487 int out_len)
2488 {
2489 struct ib_uverbs_destroy_qp cmd;
2490 struct ib_uverbs_destroy_qp_resp resp;
2491 struct ib_uobject *uobj;
2492 struct ib_qp *qp;
2493 struct ib_uqp_object *obj;
2494 int ret = -EINVAL;
2495
2496 if (copy_from_user(&cmd, buf, sizeof cmd))
2497 return -EFAULT;
2498
2499 memset(&resp, 0, sizeof resp);
2500
2501 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2502 if (!uobj)
2503 return -EINVAL;
2504 qp = uobj->object;
2505 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2506
2507 if (!list_empty(&obj->mcast_list)) {
2508 put_uobj_write(uobj);
2509 return -EBUSY;
2510 }
2511
2512 ret = ib_destroy_qp(qp);
2513 if (!ret)
2514 uobj->live = 0;
2515
2516 put_uobj_write(uobj);
2517
2518 if (ret)
2519 return ret;
2520
2521 if (obj->uxrcd)
2522 atomic_dec(&obj->uxrcd->refcnt);
2523
2524 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2525
2526 mutex_lock(&file->mutex);
2527 list_del(&uobj->list);
2528 mutex_unlock(&file->mutex);
2529
2530 ib_uverbs_release_uevent(file, &obj->uevent);
2531
2532 resp.events_reported = obj->uevent.events_reported;
2533
2534 put_uobj(uobj);
2535
2536 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2537 &resp, sizeof resp))
2538 return -EFAULT;
2539
2540 return in_len;
2541 }
2542
2543 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2544 {
2545 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2546 num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2547 };
2548
2549 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2550 struct ib_device *ib_dev,
2551 const char __user *buf, int in_len,
2552 int out_len)
2553 {
2554 struct ib_uverbs_post_send cmd;
2555 struct ib_uverbs_post_send_resp resp;
2556 struct ib_uverbs_send_wr *user_wr;
2557 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
2558 struct ib_qp *qp;
2559 int i, sg_ind;
2560 int is_ud;
2561 ssize_t ret = -EINVAL;
2562 size_t next_size;
2563
2564 if (copy_from_user(&cmd, buf, sizeof cmd))
2565 return -EFAULT;
2566
2567 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2568 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2569 return -EINVAL;
2570
2571 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2572 return -EINVAL;
2573
2574 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2575 if (!user_wr)
2576 return -ENOMEM;
2577
2578 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2579 if (!qp)
2580 goto out;
2581
2582 is_ud = qp->qp_type == IB_QPT_UD;
2583 sg_ind = 0;
2584 last = NULL;
2585 for (i = 0; i < cmd.wr_count; ++i) {
2586 if (copy_from_user(user_wr,
2587 buf + sizeof cmd + i * cmd.wqe_size,
2588 cmd.wqe_size)) {
2589 ret = -EFAULT;
2590 goto out_put;
2591 }
2592
2593 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2594 ret = -EINVAL;
2595 goto out_put;
2596 }
2597
2598 if (is_ud) {
2599 struct ib_ud_wr *ud;
2600
2601 if (user_wr->opcode != IB_WR_SEND &&
2602 user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2603 ret = -EINVAL;
2604 goto out_put;
2605 }
2606
2607 next_size = sizeof(*ud);
2608 ud = alloc_wr(next_size, user_wr->num_sge);
2609 if (!ud) {
2610 ret = -ENOMEM;
2611 goto out_put;
2612 }
2613
2614 ud->ah = idr_read_ah(user_wr->wr.ud.ah, file->ucontext);
2615 if (!ud->ah) {
2616 kfree(ud);
2617 ret = -EINVAL;
2618 goto out_put;
2619 }
2620 ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2621 ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2622
2623 next = &ud->wr;
2624 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2625 user_wr->opcode == IB_WR_RDMA_WRITE ||
2626 user_wr->opcode == IB_WR_RDMA_READ) {
2627 struct ib_rdma_wr *rdma;
2628
2629 next_size = sizeof(*rdma);
2630 rdma = alloc_wr(next_size, user_wr->num_sge);
2631 if (!rdma) {
2632 ret = -ENOMEM;
2633 goto out_put;
2634 }
2635
2636 rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2637 rdma->rkey = user_wr->wr.rdma.rkey;
2638
2639 next = &rdma->wr;
2640 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2641 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2642 struct ib_atomic_wr *atomic;
2643
2644 next_size = sizeof(*atomic);
2645 atomic = alloc_wr(next_size, user_wr->num_sge);
2646 if (!atomic) {
2647 ret = -ENOMEM;
2648 goto out_put;
2649 }
2650
2651 atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2652 atomic->compare_add = user_wr->wr.atomic.compare_add;
2653 atomic->swap = user_wr->wr.atomic.swap;
2654 atomic->rkey = user_wr->wr.atomic.rkey;
2655
2656 next = &atomic->wr;
2657 } else if (user_wr->opcode == IB_WR_SEND ||
2658 user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2659 user_wr->opcode == IB_WR_SEND_WITH_INV) {
2660 next_size = sizeof(*next);
2661 next = alloc_wr(next_size, user_wr->num_sge);
2662 if (!next) {
2663 ret = -ENOMEM;
2664 goto out_put;
2665 }
2666 } else {
2667 ret = -EINVAL;
2668 goto out_put;
2669 }
2670
2671 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2672 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2673 next->ex.imm_data =
2674 (__be32 __force) user_wr->ex.imm_data;
2675 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2676 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2677 }
2678
2679 if (!last)
2680 wr = next;
2681 else
2682 last->next = next;
2683 last = next;
2684
2685 next->next = NULL;
2686 next->wr_id = user_wr->wr_id;
2687 next->num_sge = user_wr->num_sge;
2688 next->opcode = user_wr->opcode;
2689 next->send_flags = user_wr->send_flags;
2690
2691 if (next->num_sge) {
2692 next->sg_list = (void *) next +
2693 ALIGN(next_size, sizeof(struct ib_sge));
2694 if (copy_from_user(next->sg_list,
2695 buf + sizeof cmd +
2696 cmd.wr_count * cmd.wqe_size +
2697 sg_ind * sizeof (struct ib_sge),
2698 next->num_sge * sizeof (struct ib_sge))) {
2699 ret = -EFAULT;
2700 goto out_put;
2701 }
2702 sg_ind += next->num_sge;
2703 } else
2704 next->sg_list = NULL;
2705 }
2706
2707 resp.bad_wr = 0;
2708 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2709 if (ret)
2710 for (next = wr; next; next = next->next) {
2711 ++resp.bad_wr;
2712 if (next == bad_wr)
2713 break;
2714 }
2715
2716 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2717 &resp, sizeof resp))
2718 ret = -EFAULT;
2719
2720 out_put:
2721 put_qp_read(qp);
2722
2723 while (wr) {
2724 if (is_ud && ud_wr(wr)->ah)
2725 put_ah_read(ud_wr(wr)->ah);
2726 next = wr->next;
2727 kfree(wr);
2728 wr = next;
2729 }
2730
2731 out:
2732 kfree(user_wr);
2733
2734 return ret ? ret : in_len;
2735 }
2736
2737 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2738 int in_len,
2739 u32 wr_count,
2740 u32 sge_count,
2741 u32 wqe_size)
2742 {
2743 struct ib_uverbs_recv_wr *user_wr;
2744 struct ib_recv_wr *wr = NULL, *last, *next;
2745 int sg_ind;
2746 int i;
2747 int ret;
2748
2749 if (in_len < wqe_size * wr_count +
2750 sge_count * sizeof (struct ib_uverbs_sge))
2751 return ERR_PTR(-EINVAL);
2752
2753 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2754 return ERR_PTR(-EINVAL);
2755
2756 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2757 if (!user_wr)
2758 return ERR_PTR(-ENOMEM);
2759
2760 sg_ind = 0;
2761 last = NULL;
2762 for (i = 0; i < wr_count; ++i) {
2763 if (copy_from_user(user_wr, buf + i * wqe_size,
2764 wqe_size)) {
2765 ret = -EFAULT;
2766 goto err;
2767 }
2768
2769 if (user_wr->num_sge + sg_ind > sge_count) {
2770 ret = -EINVAL;
2771 goto err;
2772 }
2773
2774 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2775 user_wr->num_sge * sizeof (struct ib_sge),
2776 GFP_KERNEL);
2777 if (!next) {
2778 ret = -ENOMEM;
2779 goto err;
2780 }
2781
2782 if (!last)
2783 wr = next;
2784 else
2785 last->next = next;
2786 last = next;
2787
2788 next->next = NULL;
2789 next->wr_id = user_wr->wr_id;
2790 next->num_sge = user_wr->num_sge;
2791
2792 if (next->num_sge) {
2793 next->sg_list = (void *) next +
2794 ALIGN(sizeof *next, sizeof (struct ib_sge));
2795 if (copy_from_user(next->sg_list,
2796 buf + wr_count * wqe_size +
2797 sg_ind * sizeof (struct ib_sge),
2798 next->num_sge * sizeof (struct ib_sge))) {
2799 ret = -EFAULT;
2800 goto err;
2801 }
2802 sg_ind += next->num_sge;
2803 } else
2804 next->sg_list = NULL;
2805 }
2806
2807 kfree(user_wr);
2808 return wr;
2809
2810 err:
2811 kfree(user_wr);
2812
2813 while (wr) {
2814 next = wr->next;
2815 kfree(wr);
2816 wr = next;
2817 }
2818
2819 return ERR_PTR(ret);
2820 }
2821
2822 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2823 struct ib_device *ib_dev,
2824 const char __user *buf, int in_len,
2825 int out_len)
2826 {
2827 struct ib_uverbs_post_recv cmd;
2828 struct ib_uverbs_post_recv_resp resp;
2829 struct ib_recv_wr *wr, *next, *bad_wr;
2830 struct ib_qp *qp;
2831 ssize_t ret = -EINVAL;
2832
2833 if (copy_from_user(&cmd, buf, sizeof cmd))
2834 return -EFAULT;
2835
2836 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2837 in_len - sizeof cmd, cmd.wr_count,
2838 cmd.sge_count, cmd.wqe_size);
2839 if (IS_ERR(wr))
2840 return PTR_ERR(wr);
2841
2842 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2843 if (!qp)
2844 goto out;
2845
2846 resp.bad_wr = 0;
2847 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2848
2849 put_qp_read(qp);
2850
2851 if (ret)
2852 for (next = wr; next; next = next->next) {
2853 ++resp.bad_wr;
2854 if (next == bad_wr)
2855 break;
2856 }
2857
2858 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2859 &resp, sizeof resp))
2860 ret = -EFAULT;
2861
2862 out:
2863 while (wr) {
2864 next = wr->next;
2865 kfree(wr);
2866 wr = next;
2867 }
2868
2869 return ret ? ret : in_len;
2870 }
2871
2872 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2873 struct ib_device *ib_dev,
2874 const char __user *buf, int in_len,
2875 int out_len)
2876 {
2877 struct ib_uverbs_post_srq_recv cmd;
2878 struct ib_uverbs_post_srq_recv_resp resp;
2879 struct ib_recv_wr *wr, *next, *bad_wr;
2880 struct ib_srq *srq;
2881 ssize_t ret = -EINVAL;
2882
2883 if (copy_from_user(&cmd, buf, sizeof cmd))
2884 return -EFAULT;
2885
2886 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2887 in_len - sizeof cmd, cmd.wr_count,
2888 cmd.sge_count, cmd.wqe_size);
2889 if (IS_ERR(wr))
2890 return PTR_ERR(wr);
2891
2892 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2893 if (!srq)
2894 goto out;
2895
2896 resp.bad_wr = 0;
2897 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2898
2899 put_srq_read(srq);
2900
2901 if (ret)
2902 for (next = wr; next; next = next->next) {
2903 ++resp.bad_wr;
2904 if (next == bad_wr)
2905 break;
2906 }
2907
2908 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2909 &resp, sizeof resp))
2910 ret = -EFAULT;
2911
2912 out:
2913 while (wr) {
2914 next = wr->next;
2915 kfree(wr);
2916 wr = next;
2917 }
2918
2919 return ret ? ret : in_len;
2920 }
2921
2922 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2923 struct ib_device *ib_dev,
2924 const char __user *buf, int in_len,
2925 int out_len)
2926 {
2927 struct ib_uverbs_create_ah cmd;
2928 struct ib_uverbs_create_ah_resp resp;
2929 struct ib_uobject *uobj;
2930 struct ib_pd *pd;
2931 struct ib_ah *ah;
2932 struct ib_ah_attr attr;
2933 int ret;
2934 struct ib_udata udata;
2935
2936 if (out_len < sizeof resp)
2937 return -ENOSPC;
2938
2939 if (copy_from_user(&cmd, buf, sizeof cmd))
2940 return -EFAULT;
2941
2942 INIT_UDATA(&udata, buf + sizeof(cmd),
2943 (unsigned long)cmd.response + sizeof(resp),
2944 in_len - sizeof(cmd), out_len - sizeof(resp));
2945
2946 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2947 if (!uobj)
2948 return -ENOMEM;
2949
2950 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2951 down_write(&uobj->mutex);
2952
2953 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2954 if (!pd) {
2955 ret = -EINVAL;
2956 goto err;
2957 }
2958
2959 attr.dlid = cmd.attr.dlid;
2960 attr.sl = cmd.attr.sl;
2961 attr.src_path_bits = cmd.attr.src_path_bits;
2962 attr.static_rate = cmd.attr.static_rate;
2963 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2964 attr.port_num = cmd.attr.port_num;
2965 attr.grh.flow_label = cmd.attr.grh.flow_label;
2966 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2967 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2968 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2969 memset(&attr.dmac, 0, sizeof(attr.dmac));
2970 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2971
2972 ah = pd->device->create_ah(pd, &attr, &udata);
2973
2974 if (IS_ERR(ah)) {
2975 ret = PTR_ERR(ah);
2976 goto err_put;
2977 }
2978
2979 ah->device = pd->device;
2980 ah->pd = pd;
2981 atomic_inc(&pd->usecnt);
2982 ah->uobject = uobj;
2983 uobj->object = ah;
2984
2985 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2986 if (ret)
2987 goto err_destroy;
2988
2989 resp.ah_handle = uobj->id;
2990
2991 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2992 &resp, sizeof resp)) {
2993 ret = -EFAULT;
2994 goto err_copy;
2995 }
2996
2997 put_pd_read(pd);
2998
2999 mutex_lock(&file->mutex);
3000 list_add_tail(&uobj->list, &file->ucontext->ah_list);
3001 mutex_unlock(&file->mutex);
3002
3003 uobj->live = 1;
3004
3005 up_write(&uobj->mutex);
3006
3007 return in_len;
3008
3009 err_copy:
3010 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
3011
3012 err_destroy:
3013 ib_destroy_ah(ah);
3014
3015 err_put:
3016 put_pd_read(pd);
3017
3018 err:
3019 put_uobj_write(uobj);
3020 return ret;
3021 }
3022
3023 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
3024 struct ib_device *ib_dev,
3025 const char __user *buf, int in_len, int out_len)
3026 {
3027 struct ib_uverbs_destroy_ah cmd;
3028 struct ib_ah *ah;
3029 struct ib_uobject *uobj;
3030 int ret;
3031
3032 if (copy_from_user(&cmd, buf, sizeof cmd))
3033 return -EFAULT;
3034
3035 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
3036 if (!uobj)
3037 return -EINVAL;
3038 ah = uobj->object;
3039
3040 ret = ib_destroy_ah(ah);
3041 if (!ret)
3042 uobj->live = 0;
3043
3044 put_uobj_write(uobj);
3045
3046 if (ret)
3047 return ret;
3048
3049 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
3050
3051 mutex_lock(&file->mutex);
3052 list_del(&uobj->list);
3053 mutex_unlock(&file->mutex);
3054
3055 put_uobj(uobj);
3056
3057 return in_len;
3058 }
3059
3060 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
3061 struct ib_device *ib_dev,
3062 const char __user *buf, int in_len,
3063 int out_len)
3064 {
3065 struct ib_uverbs_attach_mcast cmd;
3066 struct ib_qp *qp;
3067 struct ib_uqp_object *obj;
3068 struct ib_uverbs_mcast_entry *mcast;
3069 int ret;
3070
3071 if (copy_from_user(&cmd, buf, sizeof cmd))
3072 return -EFAULT;
3073
3074 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
3075 if (!qp)
3076 return -EINVAL;
3077
3078 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
3079
3080 list_for_each_entry(mcast, &obj->mcast_list, list)
3081 if (cmd.mlid == mcast->lid &&
3082 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
3083 ret = 0;
3084 goto out_put;
3085 }
3086
3087 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
3088 if (!mcast) {
3089 ret = -ENOMEM;
3090 goto out_put;
3091 }
3092
3093 mcast->lid = cmd.mlid;
3094 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
3095
3096 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
3097 if (!ret)
3098 list_add_tail(&mcast->list, &obj->mcast_list);
3099 else
3100 kfree(mcast);
3101
3102 out_put:
3103 put_qp_write(qp);
3104
3105 return ret ? ret : in_len;
3106 }
3107
3108 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
3109 struct ib_device *ib_dev,
3110 const char __user *buf, int in_len,
3111 int out_len)
3112 {
3113 struct ib_uverbs_detach_mcast cmd;
3114 struct ib_uqp_object *obj;
3115 struct ib_qp *qp;
3116 struct ib_uverbs_mcast_entry *mcast;
3117 int ret = -EINVAL;
3118
3119 if (copy_from_user(&cmd, buf, sizeof cmd))
3120 return -EFAULT;
3121
3122 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
3123 if (!qp)
3124 return -EINVAL;
3125
3126 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
3127 if (ret)
3128 goto out_put;
3129
3130 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
3131
3132 list_for_each_entry(mcast, &obj->mcast_list, list)
3133 if (cmd.mlid == mcast->lid &&
3134 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
3135 list_del(&mcast->list);
3136 kfree(mcast);
3137 break;
3138 }
3139
3140 out_put:
3141 put_qp_write(qp);
3142
3143 return ret ? ret : in_len;
3144 }
3145
3146 static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
3147 {
3148 /* Returns user space filter size, includes padding */
3149 return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
3150 }
3151
3152 static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
3153 u16 ib_real_filter_sz)
3154 {
3155 /*
3156 * User space filter structures must be 64 bit aligned, otherwise this
3157 * may pass, but we won't handle additional new attributes.
3158 */
3159
3160 if (kern_filter_size > ib_real_filter_sz) {
3161 if (memchr_inv(kern_spec_filter +
3162 ib_real_filter_sz, 0,
3163 kern_filter_size - ib_real_filter_sz))
3164 return -EINVAL;
3165 return ib_real_filter_sz;
3166 }
3167 return kern_filter_size;
3168 }
3169
3170 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
3171 union ib_flow_spec *ib_spec)
3172 {
3173 ssize_t actual_filter_sz;
3174 ssize_t kern_filter_sz;
3175 ssize_t ib_filter_sz;
3176 void *kern_spec_mask;
3177 void *kern_spec_val;
3178
3179 if (kern_spec->reserved)
3180 return -EINVAL;
3181
3182 ib_spec->type = kern_spec->type;
3183
3184 kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
3185 /* User flow spec size must be aligned to 4 bytes */
3186 if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
3187 return -EINVAL;
3188
3189 kern_spec_val = (void *)kern_spec +
3190 sizeof(struct ib_uverbs_flow_spec_hdr);
3191 kern_spec_mask = kern_spec_val + kern_filter_sz;
3192 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
3193 return -EINVAL;
3194
3195 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
3196 case IB_FLOW_SPEC_ETH:
3197 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
3198 actual_filter_sz = spec_filter_size(kern_spec_mask,
3199 kern_filter_sz,
3200 ib_filter_sz);
3201 if (actual_filter_sz <= 0)
3202 return -EINVAL;
3203 ib_spec->size = sizeof(struct ib_flow_spec_eth);
3204 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
3205 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
3206 break;
3207 case IB_FLOW_SPEC_IPV4:
3208 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
3209 actual_filter_sz = spec_filter_size(kern_spec_mask,
3210 kern_filter_sz,
3211 ib_filter_sz);
3212 if (actual_filter_sz <= 0)
3213 return -EINVAL;
3214 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
3215 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
3216 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
3217 break;
3218 case IB_FLOW_SPEC_IPV6:
3219 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
3220 actual_filter_sz = spec_filter_size(kern_spec_mask,
3221 kern_filter_sz,
3222 ib_filter_sz);
3223 if (actual_filter_sz <= 0)
3224 return -EINVAL;
3225 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
3226 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
3227 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
3228
3229 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
3230 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
3231 return -EINVAL;
3232 break;
3233 case IB_FLOW_SPEC_TCP:
3234 case IB_FLOW_SPEC_UDP:
3235 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
3236 actual_filter_sz = spec_filter_size(kern_spec_mask,
3237 kern_filter_sz,
3238 ib_filter_sz);
3239 if (actual_filter_sz <= 0)
3240 return -EINVAL;
3241 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
3242 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
3243 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
3244 break;
3245 case IB_FLOW_SPEC_VXLAN_TUNNEL:
3246 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
3247 actual_filter_sz = spec_filter_size(kern_spec_mask,
3248 kern_filter_sz,
3249 ib_filter_sz);
3250 if (actual_filter_sz <= 0)
3251 return -EINVAL;
3252 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
3253 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
3254 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
3255
3256 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
3257 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
3258 return -EINVAL;
3259 break;
3260 default:
3261 return -EINVAL;
3262 }
3263 return 0;
3264 }
3265
3266 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
3267 struct ib_device *ib_dev,
3268 struct ib_udata *ucore,
3269 struct ib_udata *uhw)
3270 {
3271 struct ib_uverbs_ex_create_wq cmd = {};
3272 struct ib_uverbs_ex_create_wq_resp resp = {};
3273 struct ib_uwq_object *obj;
3274 int err = 0;
3275 struct ib_cq *cq;
3276 struct ib_pd *pd;
3277 struct ib_wq *wq;
3278 struct ib_wq_init_attr wq_init_attr = {};
3279 size_t required_cmd_sz;
3280 size_t required_resp_len;
3281
3282 required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
3283 required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
3284
3285 if (ucore->inlen < required_cmd_sz)
3286 return -EINVAL;
3287
3288 if (ucore->outlen < required_resp_len)
3289 return -ENOSPC;
3290
3291 if (ucore->inlen > sizeof(cmd) &&
3292 !ib_is_udata_cleared(ucore, sizeof(cmd),
3293 ucore->inlen - sizeof(cmd)))
3294 return -EOPNOTSUPP;
3295
3296 err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3297 if (err)
3298 return err;
3299
3300 if (cmd.comp_mask)
3301 return -EOPNOTSUPP;
3302
3303 obj = kmalloc(sizeof(*obj), GFP_KERNEL);
3304 if (!obj)
3305 return -ENOMEM;
3306
3307 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext,
3308 &wq_lock_class);
3309 down_write(&obj->uevent.uobject.mutex);
3310 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
3311 if (!pd) {
3312 err = -EINVAL;
3313 goto err_uobj;
3314 }
3315
3316 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
3317 if (!cq) {
3318 err = -EINVAL;
3319 goto err_put_pd;
3320 }
3321
3322 wq_init_attr.cq = cq;
3323 wq_init_attr.max_sge = cmd.max_sge;
3324 wq_init_attr.max_wr = cmd.max_wr;
3325 wq_init_attr.wq_context = file;
3326 wq_init_attr.wq_type = cmd.wq_type;
3327 wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
3328 obj->uevent.events_reported = 0;
3329 INIT_LIST_HEAD(&obj->uevent.event_list);
3330 wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
3331 if (IS_ERR(wq)) {
3332 err = PTR_ERR(wq);
3333 goto err_put_cq;
3334 }
3335
3336 wq->uobject = &obj->uevent.uobject;
3337 obj->uevent.uobject.object = wq;
3338 wq->wq_type = wq_init_attr.wq_type;
3339 wq->cq = cq;
3340 wq->pd = pd;
3341 wq->device = pd->device;
3342 wq->wq_context = wq_init_attr.wq_context;
3343 atomic_set(&wq->usecnt, 0);
3344 atomic_inc(&pd->usecnt);
3345 atomic_inc(&cq->usecnt);
3346 wq->uobject = &obj->uevent.uobject;
3347 obj->uevent.uobject.object = wq;
3348 err = idr_add_uobj(&ib_uverbs_wq_idr, &obj->uevent.uobject);
3349 if (err)
3350 goto destroy_wq;
3351
3352 memset(&resp, 0, sizeof(resp));
3353 resp.wq_handle = obj->uevent.uobject.id;
3354 resp.max_sge = wq_init_attr.max_sge;
3355 resp.max_wr = wq_init_attr.max_wr;
3356 resp.wqn = wq->wq_num;
3357 resp.response_length = required_resp_len;
3358 err = ib_copy_to_udata(ucore,
3359 &resp, resp.response_length);
3360 if (err)
3361 goto err_copy;
3362
3363 put_pd_read(pd);
3364 put_cq_read(cq);
3365
3366 mutex_lock(&file->mutex);
3367 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->wq_list);
3368 mutex_unlock(&file->mutex);
3369
3370 obj->uevent.uobject.live = 1;
3371 up_write(&obj->uevent.uobject.mutex);
3372 return 0;
3373
3374 err_copy:
3375 idr_remove_uobj(&ib_uverbs_wq_idr, &obj->uevent.uobject);
3376 destroy_wq:
3377 ib_destroy_wq(wq);
3378 err_put_cq:
3379 put_cq_read(cq);
3380 err_put_pd:
3381 put_pd_read(pd);
3382 err_uobj:
3383 put_uobj_write(&obj->uevent.uobject);
3384
3385 return err;
3386 }
3387
3388 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
3389 struct ib_device *ib_dev,
3390 struct ib_udata *ucore,
3391 struct ib_udata *uhw)
3392 {
3393 struct ib_uverbs_ex_destroy_wq cmd = {};
3394 struct ib_uverbs_ex_destroy_wq_resp resp = {};
3395 struct ib_wq *wq;
3396 struct ib_uobject *uobj;
3397 struct ib_uwq_object *obj;
3398 size_t required_cmd_sz;
3399 size_t required_resp_len;
3400 int ret;
3401
3402 required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3403 required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3404
3405 if (ucore->inlen < required_cmd_sz)
3406 return -EINVAL;
3407
3408 if (ucore->outlen < required_resp_len)
3409 return -ENOSPC;
3410
3411 if (ucore->inlen > sizeof(cmd) &&
3412 !ib_is_udata_cleared(ucore, sizeof(cmd),
3413 ucore->inlen - sizeof(cmd)))
3414 return -EOPNOTSUPP;
3415
3416 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3417 if (ret)
3418 return ret;
3419
3420 if (cmd.comp_mask)
3421 return -EOPNOTSUPP;
3422
3423 resp.response_length = required_resp_len;
3424 uobj = idr_write_uobj(&ib_uverbs_wq_idr, cmd.wq_handle,
3425 file->ucontext);
3426 if (!uobj)
3427 return -EINVAL;
3428
3429 wq = uobj->object;
3430 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3431 ret = ib_destroy_wq(wq);
3432 if (!ret)
3433 uobj->live = 0;
3434
3435 put_uobj_write(uobj);
3436 if (ret)
3437 return ret;
3438
3439 idr_remove_uobj(&ib_uverbs_wq_idr, uobj);
3440
3441 mutex_lock(&file->mutex);
3442 list_del(&uobj->list);
3443 mutex_unlock(&file->mutex);
3444
3445 ib_uverbs_release_uevent(file, &obj->uevent);
3446 resp.events_reported = obj->uevent.events_reported;
3447 put_uobj(uobj);
3448
3449 ret = ib_copy_to_udata(ucore, &resp, resp.response_length);
3450 if (ret)
3451 return ret;
3452
3453 return 0;
3454 }
3455
3456 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3457 struct ib_device *ib_dev,
3458 struct ib_udata *ucore,
3459 struct ib_udata *uhw)
3460 {
3461 struct ib_uverbs_ex_modify_wq cmd = {};
3462 struct ib_wq *wq;
3463 struct ib_wq_attr wq_attr = {};
3464 size_t required_cmd_sz;
3465 int ret;
3466
3467 required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3468 if (ucore->inlen < required_cmd_sz)
3469 return -EINVAL;
3470
3471 if (ucore->inlen > sizeof(cmd) &&
3472 !ib_is_udata_cleared(ucore, sizeof(cmd),
3473 ucore->inlen - sizeof(cmd)))
3474 return -EOPNOTSUPP;
3475
3476 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3477 if (ret)
3478 return ret;
3479
3480 if (!cmd.attr_mask)
3481 return -EINVAL;
3482
3483 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE))
3484 return -EINVAL;
3485
3486 wq = idr_read_wq(cmd.wq_handle, file->ucontext);
3487 if (!wq)
3488 return -EINVAL;
3489
3490 wq_attr.curr_wq_state = cmd.curr_wq_state;
3491 wq_attr.wq_state = cmd.wq_state;
3492 ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3493 put_wq_read(wq);
3494 return ret;
3495 }
3496
3497 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3498 struct ib_device *ib_dev,
3499 struct ib_udata *ucore,
3500 struct ib_udata *uhw)
3501 {
3502 struct ib_uverbs_ex_create_rwq_ind_table cmd = {};
3503 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {};
3504 struct ib_uobject *uobj;
3505 int err = 0;
3506 struct ib_rwq_ind_table_init_attr init_attr = {};
3507 struct ib_rwq_ind_table *rwq_ind_tbl;
3508 struct ib_wq **wqs = NULL;
3509 u32 *wqs_handles = NULL;
3510 struct ib_wq *wq = NULL;
3511 int i, j, num_read_wqs;
3512 u32 num_wq_handles;
3513 u32 expected_in_size;
3514 size_t required_cmd_sz_header;
3515 size_t required_resp_len;
3516
3517 required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3518 required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3519
3520 if (ucore->inlen < required_cmd_sz_header)
3521 return -EINVAL;
3522
3523 if (ucore->outlen < required_resp_len)
3524 return -ENOSPC;
3525
3526 err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3527 if (err)
3528 return err;
3529
3530 ucore->inbuf += required_cmd_sz_header;
3531 ucore->inlen -= required_cmd_sz_header;
3532
3533 if (cmd.comp_mask)
3534 return -EOPNOTSUPP;
3535
3536 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3537 return -EINVAL;
3538
3539 num_wq_handles = 1 << cmd.log_ind_tbl_size;
3540 expected_in_size = num_wq_handles * sizeof(__u32);
3541 if (num_wq_handles == 1)
3542 /* input size for wq handles is u64 aligned */
3543 expected_in_size += sizeof(__u32);
3544
3545 if (ucore->inlen < expected_in_size)
3546 return -EINVAL;
3547
3548 if (ucore->inlen > expected_in_size &&
3549 !ib_is_udata_cleared(ucore, expected_in_size,
3550 ucore->inlen - expected_in_size))
3551 return -EOPNOTSUPP;
3552
3553 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3554 GFP_KERNEL);
3555 if (!wqs_handles)
3556 return -ENOMEM;
3557
3558 err = ib_copy_from_udata(wqs_handles, ucore,
3559 num_wq_handles * sizeof(__u32));
3560 if (err)
3561 goto err_free;
3562
3563 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3564 if (!wqs) {
3565 err = -ENOMEM;
3566 goto err_free;
3567 }
3568
3569 for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3570 num_read_wqs++) {
3571 wq = idr_read_wq(wqs_handles[num_read_wqs], file->ucontext);
3572 if (!wq) {
3573 err = -EINVAL;
3574 goto put_wqs;
3575 }
3576
3577 wqs[num_read_wqs] = wq;
3578 }
3579
3580 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
3581 if (!uobj) {
3582 err = -ENOMEM;
3583 goto put_wqs;
3584 }
3585
3586 init_uobj(uobj, 0, file->ucontext, &rwq_ind_table_lock_class);
3587 down_write(&uobj->mutex);
3588 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3589 init_attr.ind_tbl = wqs;
3590 rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3591
3592 if (IS_ERR(rwq_ind_tbl)) {
3593 err = PTR_ERR(rwq_ind_tbl);
3594 goto err_uobj;
3595 }
3596
3597 rwq_ind_tbl->ind_tbl = wqs;
3598 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3599 rwq_ind_tbl->uobject = uobj;
3600 uobj->object = rwq_ind_tbl;
3601 rwq_ind_tbl->device = ib_dev;
3602 atomic_set(&rwq_ind_tbl->usecnt, 0);
3603
3604 for (i = 0; i < num_wq_handles; i++)
3605 atomic_inc(&wqs[i]->usecnt);
3606
3607 err = idr_add_uobj(&ib_uverbs_rwq_ind_tbl_idr, uobj);
3608 if (err)
3609 goto destroy_ind_tbl;
3610
3611 resp.ind_tbl_handle = uobj->id;
3612 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3613 resp.response_length = required_resp_len;
3614
3615 err = ib_copy_to_udata(ucore,
3616 &resp, resp.response_length);
3617 if (err)
3618 goto err_copy;
3619
3620 kfree(wqs_handles);
3621
3622 for (j = 0; j < num_read_wqs; j++)
3623 put_wq_read(wqs[j]);
3624
3625 mutex_lock(&file->mutex);
3626 list_add_tail(&uobj->list, &file->ucontext->rwq_ind_tbl_list);
3627 mutex_unlock(&file->mutex);
3628
3629 uobj->live = 1;
3630
3631 up_write(&uobj->mutex);
3632 return 0;
3633
3634 err_copy:
3635 idr_remove_uobj(&ib_uverbs_rwq_ind_tbl_idr, uobj);
3636 destroy_ind_tbl:
3637 ib_destroy_rwq_ind_table(rwq_ind_tbl);
3638 err_uobj:
3639 put_uobj_write(uobj);
3640 put_wqs:
3641 for (j = 0; j < num_read_wqs; j++)
3642 put_wq_read(wqs[j]);
3643 err_free:
3644 kfree(wqs_handles);
3645 kfree(wqs);
3646 return err;
3647 }
3648
3649 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3650 struct ib_device *ib_dev,
3651 struct ib_udata *ucore,
3652 struct ib_udata *uhw)
3653 {
3654 struct ib_uverbs_ex_destroy_rwq_ind_table cmd = {};
3655 struct ib_rwq_ind_table *rwq_ind_tbl;
3656 struct ib_uobject *uobj;
3657 int ret;
3658 struct ib_wq **ind_tbl;
3659 size_t required_cmd_sz;
3660
3661 required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3662
3663 if (ucore->inlen < required_cmd_sz)
3664 return -EINVAL;
3665
3666 if (ucore->inlen > sizeof(cmd) &&
3667 !ib_is_udata_cleared(ucore, sizeof(cmd),
3668 ucore->inlen - sizeof(cmd)))
3669 return -EOPNOTSUPP;
3670
3671 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3672 if (ret)
3673 return ret;
3674
3675 if (cmd.comp_mask)
3676 return -EOPNOTSUPP;
3677
3678 uobj = idr_write_uobj(&ib_uverbs_rwq_ind_tbl_idr, cmd.ind_tbl_handle,
3679 file->ucontext);
3680 if (!uobj)
3681 return -EINVAL;
3682 rwq_ind_tbl = uobj->object;
3683 ind_tbl = rwq_ind_tbl->ind_tbl;
3684
3685 ret = ib_destroy_rwq_ind_table(rwq_ind_tbl);
3686 if (!ret)
3687 uobj->live = 0;
3688
3689 put_uobj_write(uobj);
3690
3691 if (ret)
3692 return ret;
3693
3694 idr_remove_uobj(&ib_uverbs_rwq_ind_tbl_idr, uobj);
3695
3696 mutex_lock(&file->mutex);
3697 list_del(&uobj->list);
3698 mutex_unlock(&file->mutex);
3699
3700 put_uobj(uobj);
3701 kfree(ind_tbl);
3702 return ret;
3703 }
3704
3705 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3706 struct ib_device *ib_dev,
3707 struct ib_udata *ucore,
3708 struct ib_udata *uhw)
3709 {
3710 struct ib_uverbs_create_flow cmd;
3711 struct ib_uverbs_create_flow_resp resp;
3712 struct ib_uobject *uobj;
3713 struct ib_flow *flow_id;
3714 struct ib_uverbs_flow_attr *kern_flow_attr;
3715 struct ib_flow_attr *flow_attr;
3716 struct ib_qp *qp;
3717 int err = 0;
3718 void *kern_spec;
3719 void *ib_spec;
3720 int i;
3721
3722 if (ucore->inlen < sizeof(cmd))
3723 return -EINVAL;
3724
3725 if (ucore->outlen < sizeof(resp))
3726 return -ENOSPC;
3727
3728 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3729 if (err)
3730 return err;
3731
3732 ucore->inbuf += sizeof(cmd);
3733 ucore->inlen -= sizeof(cmd);
3734
3735 if (cmd.comp_mask)
3736 return -EINVAL;
3737
3738 if (!capable(CAP_NET_RAW))
3739 return -EPERM;
3740
3741 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3742 return -EINVAL;
3743
3744 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3745 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3746 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3747 return -EINVAL;
3748
3749 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3750 return -EINVAL;
3751
3752 if (cmd.flow_attr.size > ucore->inlen ||
3753 cmd.flow_attr.size >
3754 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3755 return -EINVAL;
3756
3757 if (cmd.flow_attr.reserved[0] ||
3758 cmd.flow_attr.reserved[1])
3759 return -EINVAL;
3760
3761 if (cmd.flow_attr.num_of_specs) {
3762 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3763 GFP_KERNEL);
3764 if (!kern_flow_attr)
3765 return -ENOMEM;
3766
3767 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3768 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3769 cmd.flow_attr.size);
3770 if (err)
3771 goto err_free_attr;
3772 } else {
3773 kern_flow_attr = &cmd.flow_attr;
3774 }
3775
3776 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
3777 if (!uobj) {
3778 err = -ENOMEM;
3779 goto err_free_attr;
3780 }
3781 init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
3782 down_write(&uobj->mutex);
3783
3784 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
3785 if (!qp) {
3786 err = -EINVAL;
3787 goto err_uobj;
3788 }
3789
3790 flow_attr = kzalloc(sizeof(*flow_attr) + cmd.flow_attr.num_of_specs *
3791 sizeof(union ib_flow_spec), GFP_KERNEL);
3792 if (!flow_attr) {
3793 err = -ENOMEM;
3794 goto err_put;
3795 }
3796
3797 flow_attr->type = kern_flow_attr->type;
3798 flow_attr->priority = kern_flow_attr->priority;
3799 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3800 flow_attr->port = kern_flow_attr->port;
3801 flow_attr->flags = kern_flow_attr->flags;
3802 flow_attr->size = sizeof(*flow_attr);
3803
3804 kern_spec = kern_flow_attr + 1;
3805 ib_spec = flow_attr + 1;
3806 for (i = 0; i < flow_attr->num_of_specs &&
3807 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3808 cmd.flow_attr.size >=
3809 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3810 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3811 if (err)
3812 goto err_free;
3813 flow_attr->size +=
3814 ((union ib_flow_spec *) ib_spec)->size;
3815 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3816 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3817 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3818 }
3819 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3820 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3821 i, cmd.flow_attr.size);
3822 err = -EINVAL;
3823 goto err_free;
3824 }
3825 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3826 if (IS_ERR(flow_id)) {
3827 err = PTR_ERR(flow_id);
3828 goto err_free;
3829 }
3830 flow_id->uobject = uobj;
3831 uobj->object = flow_id;
3832
3833 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
3834 if (err)
3835 goto destroy_flow;
3836
3837 memset(&resp, 0, sizeof(resp));
3838 resp.flow_handle = uobj->id;
3839
3840 err = ib_copy_to_udata(ucore,
3841 &resp, sizeof(resp));
3842 if (err)
3843 goto err_copy;
3844
3845 put_qp_read(qp);
3846 mutex_lock(&file->mutex);
3847 list_add_tail(&uobj->list, &file->ucontext->rule_list);
3848 mutex_unlock(&file->mutex);
3849
3850 uobj->live = 1;
3851
3852 up_write(&uobj->mutex);
3853 kfree(flow_attr);
3854 if (cmd.flow_attr.num_of_specs)
3855 kfree(kern_flow_attr);
3856 return 0;
3857 err_copy:
3858 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3859 destroy_flow:
3860 ib_destroy_flow(flow_id);
3861 err_free:
3862 kfree(flow_attr);
3863 err_put:
3864 put_qp_read(qp);
3865 err_uobj:
3866 put_uobj_write(uobj);
3867 err_free_attr:
3868 if (cmd.flow_attr.num_of_specs)
3869 kfree(kern_flow_attr);
3870 return err;
3871 }
3872
3873 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3874 struct ib_device *ib_dev,
3875 struct ib_udata *ucore,
3876 struct ib_udata *uhw)
3877 {
3878 struct ib_uverbs_destroy_flow cmd;
3879 struct ib_flow *flow_id;
3880 struct ib_uobject *uobj;
3881 int ret;
3882
3883 if (ucore->inlen < sizeof(cmd))
3884 return -EINVAL;
3885
3886 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3887 if (ret)
3888 return ret;
3889
3890 if (cmd.comp_mask)
3891 return -EINVAL;
3892
3893 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
3894 file->ucontext);
3895 if (!uobj)
3896 return -EINVAL;
3897 flow_id = uobj->object;
3898
3899 ret = ib_destroy_flow(flow_id);
3900 if (!ret)
3901 uobj->live = 0;
3902
3903 put_uobj_write(uobj);
3904
3905 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3906
3907 mutex_lock(&file->mutex);
3908 list_del(&uobj->list);
3909 mutex_unlock(&file->mutex);
3910
3911 put_uobj(uobj);
3912
3913 return ret;
3914 }
3915
3916 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3917 struct ib_device *ib_dev,
3918 struct ib_uverbs_create_xsrq *cmd,
3919 struct ib_udata *udata)
3920 {
3921 struct ib_uverbs_create_srq_resp resp;
3922 struct ib_usrq_object *obj;
3923 struct ib_pd *pd;
3924 struct ib_srq *srq;
3925 struct ib_uobject *uninitialized_var(xrcd_uobj);
3926 struct ib_srq_init_attr attr;
3927 int ret;
3928
3929 obj = kmalloc(sizeof *obj, GFP_KERNEL);
3930 if (!obj)
3931 return -ENOMEM;
3932
3933 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
3934 down_write(&obj->uevent.uobject.mutex);
3935
3936 if (cmd->srq_type == IB_SRQT_XRC) {
3937 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
3938 if (!attr.ext.xrc.xrcd) {
3939 ret = -EINVAL;
3940 goto err;
3941 }
3942
3943 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3944 atomic_inc(&obj->uxrcd->refcnt);
3945
3946 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
3947 if (!attr.ext.xrc.cq) {
3948 ret = -EINVAL;
3949 goto err_put_xrcd;
3950 }
3951 }
3952
3953 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
3954 if (!pd) {
3955 ret = -EINVAL;
3956 goto err_put_cq;
3957 }
3958
3959 attr.event_handler = ib_uverbs_srq_event_handler;
3960 attr.srq_context = file;
3961 attr.srq_type = cmd->srq_type;
3962 attr.attr.max_wr = cmd->max_wr;
3963 attr.attr.max_sge = cmd->max_sge;
3964 attr.attr.srq_limit = cmd->srq_limit;
3965
3966 obj->uevent.events_reported = 0;
3967 INIT_LIST_HEAD(&obj->uevent.event_list);
3968
3969 srq = pd->device->create_srq(pd, &attr, udata);
3970 if (IS_ERR(srq)) {
3971 ret = PTR_ERR(srq);
3972 goto err_put;
3973 }
3974
3975 srq->device = pd->device;
3976 srq->pd = pd;
3977 srq->srq_type = cmd->srq_type;
3978 srq->uobject = &obj->uevent.uobject;
3979 srq->event_handler = attr.event_handler;
3980 srq->srq_context = attr.srq_context;
3981
3982 if (cmd->srq_type == IB_SRQT_XRC) {
3983 srq->ext.xrc.cq = attr.ext.xrc.cq;
3984 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3985 atomic_inc(&attr.ext.xrc.cq->usecnt);
3986 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3987 }
3988
3989 atomic_inc(&pd->usecnt);
3990 atomic_set(&srq->usecnt, 0);
3991
3992 obj->uevent.uobject.object = srq;
3993 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3994 if (ret)
3995 goto err_destroy;
3996
3997 memset(&resp, 0, sizeof resp);
3998 resp.srq_handle = obj->uevent.uobject.id;
3999 resp.max_wr = attr.attr.max_wr;
4000 resp.max_sge = attr.attr.max_sge;
4001 if (cmd->srq_type == IB_SRQT_XRC)
4002 resp.srqn = srq->ext.xrc.srq_num;
4003
4004 if (copy_to_user((void __user *) (unsigned long) cmd->response,
4005 &resp, sizeof resp)) {
4006 ret = -EFAULT;
4007 goto err_copy;
4008 }
4009
4010 if (cmd->srq_type == IB_SRQT_XRC) {
4011 put_uobj_read(xrcd_uobj);
4012 put_cq_read(attr.ext.xrc.cq);
4013 }
4014 put_pd_read(pd);
4015
4016 mutex_lock(&file->mutex);
4017 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
4018 mutex_unlock(&file->mutex);
4019
4020 obj->uevent.uobject.live = 1;
4021
4022 up_write(&obj->uevent.uobject.mutex);
4023
4024 return 0;
4025
4026 err_copy:
4027 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
4028
4029 err_destroy:
4030 ib_destroy_srq(srq);
4031
4032 err_put:
4033 put_pd_read(pd);
4034
4035 err_put_cq:
4036 if (cmd->srq_type == IB_SRQT_XRC)
4037 put_cq_read(attr.ext.xrc.cq);
4038
4039 err_put_xrcd:
4040 if (cmd->srq_type == IB_SRQT_XRC) {
4041 atomic_dec(&obj->uxrcd->refcnt);
4042 put_uobj_read(xrcd_uobj);
4043 }
4044
4045 err:
4046 put_uobj_write(&obj->uevent.uobject);
4047 return ret;
4048 }
4049
4050 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
4051 struct ib_device *ib_dev,
4052 const char __user *buf, int in_len,
4053 int out_len)
4054 {
4055 struct ib_uverbs_create_srq cmd;
4056 struct ib_uverbs_create_xsrq xcmd;
4057 struct ib_uverbs_create_srq_resp resp;
4058 struct ib_udata udata;
4059 int ret;
4060
4061 if (out_len < sizeof resp)
4062 return -ENOSPC;
4063
4064 if (copy_from_user(&cmd, buf, sizeof cmd))
4065 return -EFAULT;
4066
4067 xcmd.response = cmd.response;
4068 xcmd.user_handle = cmd.user_handle;
4069 xcmd.srq_type = IB_SRQT_BASIC;
4070 xcmd.pd_handle = cmd.pd_handle;
4071 xcmd.max_wr = cmd.max_wr;
4072 xcmd.max_sge = cmd.max_sge;
4073 xcmd.srq_limit = cmd.srq_limit;
4074
4075 INIT_UDATA(&udata, buf + sizeof cmd,
4076 (unsigned long) cmd.response + sizeof resp,
4077 in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
4078 out_len - sizeof resp);
4079
4080 ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
4081 if (ret)
4082 return ret;
4083
4084 return in_len;
4085 }
4086
4087 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
4088 struct ib_device *ib_dev,
4089 const char __user *buf, int in_len, int out_len)
4090 {
4091 struct ib_uverbs_create_xsrq cmd;
4092 struct ib_uverbs_create_srq_resp resp;
4093 struct ib_udata udata;
4094 int ret;
4095
4096 if (out_len < sizeof resp)
4097 return -ENOSPC;
4098
4099 if (copy_from_user(&cmd, buf, sizeof cmd))
4100 return -EFAULT;
4101
4102 INIT_UDATA(&udata, buf + sizeof cmd,
4103 (unsigned long) cmd.response + sizeof resp,
4104 in_len - sizeof cmd - sizeof(struct ib_uverbs_cmd_hdr),
4105 out_len - sizeof resp);
4106
4107 ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
4108 if (ret)
4109 return ret;
4110
4111 return in_len;
4112 }
4113
4114 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
4115 struct ib_device *ib_dev,
4116 const char __user *buf, int in_len,
4117 int out_len)
4118 {
4119 struct ib_uverbs_modify_srq cmd;
4120 struct ib_udata udata;
4121 struct ib_srq *srq;
4122 struct ib_srq_attr attr;
4123 int ret;
4124
4125 if (copy_from_user(&cmd, buf, sizeof cmd))
4126 return -EFAULT;
4127
4128 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
4129 out_len);
4130
4131 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
4132 if (!srq)
4133 return -EINVAL;
4134
4135 attr.max_wr = cmd.max_wr;
4136 attr.srq_limit = cmd.srq_limit;
4137
4138 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
4139
4140 put_srq_read(srq);
4141
4142 return ret ? ret : in_len;
4143 }
4144
4145 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
4146 struct ib_device *ib_dev,
4147 const char __user *buf,
4148 int in_len, int out_len)
4149 {
4150 struct ib_uverbs_query_srq cmd;
4151 struct ib_uverbs_query_srq_resp resp;
4152 struct ib_srq_attr attr;
4153 struct ib_srq *srq;
4154 int ret;
4155
4156 if (out_len < sizeof resp)
4157 return -ENOSPC;
4158
4159 if (copy_from_user(&cmd, buf, sizeof cmd))
4160 return -EFAULT;
4161
4162 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
4163 if (!srq)
4164 return -EINVAL;
4165
4166 ret = ib_query_srq(srq, &attr);
4167
4168 put_srq_read(srq);
4169
4170 if (ret)
4171 return ret;
4172
4173 memset(&resp, 0, sizeof resp);
4174
4175 resp.max_wr = attr.max_wr;
4176 resp.max_sge = attr.max_sge;
4177 resp.srq_limit = attr.srq_limit;
4178
4179 if (copy_to_user((void __user *) (unsigned long) cmd.response,
4180 &resp, sizeof resp))
4181 return -EFAULT;
4182
4183 return in_len;
4184 }
4185
4186 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
4187 struct ib_device *ib_dev,
4188 const char __user *buf, int in_len,
4189 int out_len)
4190 {
4191 struct ib_uverbs_destroy_srq cmd;
4192 struct ib_uverbs_destroy_srq_resp resp;
4193 struct ib_uobject *uobj;
4194 struct ib_srq *srq;
4195 struct ib_uevent_object *obj;
4196 int ret = -EINVAL;
4197 struct ib_usrq_object *us;
4198 enum ib_srq_type srq_type;
4199
4200 if (copy_from_user(&cmd, buf, sizeof cmd))
4201 return -EFAULT;
4202
4203 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
4204 if (!uobj)
4205 return -EINVAL;
4206 srq = uobj->object;
4207 obj = container_of(uobj, struct ib_uevent_object, uobject);
4208 srq_type = srq->srq_type;
4209
4210 ret = ib_destroy_srq(srq);
4211 if (!ret)
4212 uobj->live = 0;
4213
4214 put_uobj_write(uobj);
4215
4216 if (ret)
4217 return ret;
4218
4219 if (srq_type == IB_SRQT_XRC) {
4220 us = container_of(obj, struct ib_usrq_object, uevent);
4221 atomic_dec(&us->uxrcd->refcnt);
4222 }
4223
4224 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
4225
4226 mutex_lock(&file->mutex);
4227 list_del(&uobj->list);
4228 mutex_unlock(&file->mutex);
4229
4230 ib_uverbs_release_uevent(file, obj);
4231
4232 memset(&resp, 0, sizeof resp);
4233 resp.events_reported = obj->events_reported;
4234
4235 put_uobj(uobj);
4236
4237 if (copy_to_user((void __user *) (unsigned long) cmd.response,
4238 &resp, sizeof resp))
4239 ret = -EFAULT;
4240
4241 return ret ? ret : in_len;
4242 }
4243
4244 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
4245 struct ib_device *ib_dev,
4246 struct ib_udata *ucore,
4247 struct ib_udata *uhw)
4248 {
4249 struct ib_uverbs_ex_query_device_resp resp = { {0} };
4250 struct ib_uverbs_ex_query_device cmd;
4251 struct ib_device_attr attr = {0};
4252 int err;
4253
4254 if (ucore->inlen < sizeof(cmd))
4255 return -EINVAL;
4256
4257 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
4258 if (err)
4259 return err;
4260
4261 if (cmd.comp_mask)
4262 return -EINVAL;
4263
4264 if (cmd.reserved)
4265 return -EINVAL;
4266
4267 resp.response_length = offsetof(typeof(resp), odp_caps);
4268
4269 if (ucore->outlen < resp.response_length)
4270 return -ENOSPC;
4271
4272 err = ib_dev->query_device(ib_dev, &attr, uhw);
4273 if (err)
4274 return err;
4275
4276 copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
4277
4278 if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
4279 goto end;
4280
4281 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
4282 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
4283 resp.odp_caps.per_transport_caps.rc_odp_caps =
4284 attr.odp_caps.per_transport_caps.rc_odp_caps;
4285 resp.odp_caps.per_transport_caps.uc_odp_caps =
4286 attr.odp_caps.per_transport_caps.uc_odp_caps;
4287 resp.odp_caps.per_transport_caps.ud_odp_caps =
4288 attr.odp_caps.per_transport_caps.ud_odp_caps;
4289 #endif
4290 resp.response_length += sizeof(resp.odp_caps);
4291
4292 if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
4293 goto end;
4294
4295 resp.timestamp_mask = attr.timestamp_mask;
4296 resp.response_length += sizeof(resp.timestamp_mask);
4297
4298 if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
4299 goto end;
4300
4301 resp.hca_core_clock = attr.hca_core_clock;
4302 resp.response_length += sizeof(resp.hca_core_clock);
4303
4304 if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
4305 goto end;
4306
4307 resp.device_cap_flags_ex = attr.device_cap_flags;
4308 resp.response_length += sizeof(resp.device_cap_flags_ex);
4309
4310 if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
4311 goto end;
4312
4313 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
4314 resp.rss_caps.max_rwq_indirection_tables =
4315 attr.rss_caps.max_rwq_indirection_tables;
4316 resp.rss_caps.max_rwq_indirection_table_size =
4317 attr.rss_caps.max_rwq_indirection_table_size;
4318
4319 resp.response_length += sizeof(resp.rss_caps);
4320
4321 if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
4322 goto end;
4323
4324 resp.max_wq_type_rq = attr.max_wq_type_rq;
4325 resp.response_length += sizeof(resp.max_wq_type_rq);
4326 end:
4327 err = ib_copy_to_udata(ucore, &resp, resp.response_length);
4328 return err;
4329 }
Linux with added FPC-III support