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drm/nouveau: consume the return of large GSP message
[drm/drm-misc.git] / drivers / infiniband / core / uverbs_cmd.c
blob66b02fbf077ac5672b256100a4a0cadead5c6a7c
1 /*
2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
5 * Copyright (c) 2006 Mellanox Technologies. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 */
35
36 #include <linux/file.h>
37 #include <linux/fs.h>
38 #include <linux/slab.h>
39 #include <linux/sched.h>
40
41 #include <linux/uaccess.h>
42
43 #include <rdma/uverbs_types.h>
44 #include <rdma/uverbs_std_types.h>
45 #include "rdma_core.h"
46
47 #include "uverbs.h"
48 #include "core_priv.h"
49
50 /*
51 * Copy a response to userspace. If the provided 'resp' is larger than the
52 * user buffer it is silently truncated. If the user provided a larger buffer
53 * then the trailing portion is zero filled.
54 *
55 * These semantics are intended to support future extension of the output
56 * structures.
57 */
58 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp,
59 size_t resp_len)
60 {
61 int ret;
62
63 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
64 return uverbs_copy_to_struct_or_zero(
65 attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len);
66
67 if (copy_to_user(attrs->ucore.outbuf, resp,
68 min(attrs->ucore.outlen, resp_len)))
69 return -EFAULT;
70
71 if (resp_len < attrs->ucore.outlen) {
72 /*
73 * Zero fill any extra memory that user
74 * space might have provided.
75 */
76 ret = clear_user(attrs->ucore.outbuf + resp_len,
77 attrs->ucore.outlen - resp_len);
78 if (ret)
79 return -EFAULT;
80 }
81
82 return 0;
83 }
84
85 /*
86 * Copy a request from userspace. If the provided 'req' is larger than the
87 * user buffer then the user buffer is zero extended into the 'req'. If 'req'
88 * is smaller than the user buffer then the uncopied bytes in the user buffer
89 * must be zero.
90 */
91 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req,
92 size_t req_len)
93 {
94 if (copy_from_user(req, attrs->ucore.inbuf,
95 min(attrs->ucore.inlen, req_len)))
96 return -EFAULT;
97
98 if (attrs->ucore.inlen < req_len) {
99 memset(req + attrs->ucore.inlen, 0,
100 req_len - attrs->ucore.inlen);
101 } else if (attrs->ucore.inlen > req_len) {
102 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len,
103 attrs->ucore.inlen - req_len))
104 return -EOPNOTSUPP;
105 }
106 return 0;
107 }
108
109 /*
110 * Generate the value for the 'response_length' protocol used by write_ex.
111 * This is the number of bytes the kernel actually wrote. Userspace can use
112 * this to detect what structure members in the response the kernel
113 * understood.
114 */
115 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs,
116 size_t resp_len)
117 {
118 return min_t(size_t, attrs->ucore.outlen, resp_len);
119 }
120
121 /*
122 * The iterator version of the request interface is for handlers that need to
123 * step over a flex array at the end of a command header.
124 */
125 struct uverbs_req_iter {
126 const void __user *cur;
127 const void __user *end;
128 };
129
130 static int uverbs_request_start(struct uverbs_attr_bundle *attrs,
131 struct uverbs_req_iter *iter,
132 void *req,
133 size_t req_len)
134 {
135 if (attrs->ucore.inlen < req_len)
136 return -ENOSPC;
137
138 if (copy_from_user(req, attrs->ucore.inbuf, req_len))
139 return -EFAULT;
140
141 iter->cur = attrs->ucore.inbuf + req_len;
142 iter->end = attrs->ucore.inbuf + attrs->ucore.inlen;
143 return 0;
144 }
145
146 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val,
147 size_t len)
148 {
149 if (iter->cur + len > iter->end)
150 return -ENOSPC;
151
152 if (copy_from_user(val, iter->cur, len))
153 return -EFAULT;
154
155 iter->cur += len;
156 return 0;
157 }
158
159 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter,
160 size_t len)
161 {
162 const void __user *res = iter->cur;
163
164 if (iter->cur + len > iter->end)
165 return (void __force __user *)ERR_PTR(-ENOSPC);
166 iter->cur += len;
167 return res;
168 }
169
170 static int uverbs_request_finish(struct uverbs_req_iter *iter)
171 {
172 if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur))
173 return -EOPNOTSUPP;
174 return 0;
175 }
176
177 /*
178 * When calling a destroy function during an error unwind we need to pass in
179 * the udata that is sanitized of all user arguments. Ie from the driver
180 * perspective it looks like no udata was passed.
181 */
182 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs)
183 {
184 attrs->driver_udata = (struct ib_udata){};
185 return &attrs->driver_udata;
186 }
187
188 static struct ib_uverbs_completion_event_file *
189 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs)
190 {
191 struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL,
192 fd, attrs);
193
194 if (IS_ERR(uobj))
195 return (void *)uobj;
196
197 uverbs_uobject_get(uobj);
198 uobj_put_read(uobj);
199
200 return container_of(uobj, struct ib_uverbs_completion_event_file,
201 uobj);
202 }
203 #define ib_uverbs_lookup_comp_file(_fd, _ufile) \
204 _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile)
205
206 int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs)
207 {
208 struct ib_uverbs_file *ufile = attrs->ufile;
209 struct ib_ucontext *ucontext;
210 struct ib_device *ib_dev;
211
212 ib_dev = srcu_dereference(ufile->device->ib_dev,
213 &ufile->device->disassociate_srcu);
214 if (!ib_dev)
215 return -EIO;
216
217 ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext);
218 if (!ucontext)
219 return -ENOMEM;
220
221 ucontext->device = ib_dev;
222 ucontext->ufile = ufile;
223 xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC);
224
225 rdma_restrack_new(&ucontext->res, RDMA_RESTRACK_CTX);
226 rdma_restrack_set_name(&ucontext->res, NULL);
227 attrs->context = ucontext;
228 return 0;
229 }
230
231 int ib_init_ucontext(struct uverbs_attr_bundle *attrs)
232 {
233 struct ib_ucontext *ucontext = attrs->context;
234 struct ib_uverbs_file *file = attrs->ufile;
235 int ret;
236
237 if (!down_read_trylock(&file->hw_destroy_rwsem))
238 return -EIO;
239 mutex_lock(&file->ucontext_lock);
240 if (file->ucontext) {
241 ret = -EINVAL;
242 goto err;
243 }
244
245 ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device,
246 RDMACG_RESOURCE_HCA_HANDLE);
247 if (ret)
248 goto err;
249
250 ret = ucontext->device->ops.alloc_ucontext(ucontext,
251 &attrs->driver_udata);
252 if (ret)
253 goto err_uncharge;
254
255 rdma_restrack_add(&ucontext->res);
256
257 /*
258 * Make sure that ib_uverbs_get_ucontext() sees the pointer update
259 * only after all writes to setup the ucontext have completed
260 */
261 smp_store_release(&file->ucontext, ucontext);
262
263 mutex_unlock(&file->ucontext_lock);
264 up_read(&file->hw_destroy_rwsem);
265 return 0;
266
267 err_uncharge:
268 ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device,
269 RDMACG_RESOURCE_HCA_HANDLE);
270 err:
271 mutex_unlock(&file->ucontext_lock);
272 up_read(&file->hw_destroy_rwsem);
273 return ret;
274 }
275
276 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs)
277 {
278 struct ib_uverbs_get_context_resp resp;
279 struct ib_uverbs_get_context cmd;
280 struct ib_device *ib_dev;
281 struct ib_uobject *uobj;
282 int ret;
283
284 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
285 if (ret)
286 return ret;
287
288 ret = ib_alloc_ucontext(attrs);
289 if (ret)
290 return ret;
291
292 uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev);
293 if (IS_ERR(uobj)) {
294 ret = PTR_ERR(uobj);
295 goto err_ucontext;
296 }
297
298 resp = (struct ib_uverbs_get_context_resp){
299 .num_comp_vectors = attrs->ufile->device->num_comp_vectors,
300 .async_fd = uobj->id,
301 };
302 ret = uverbs_response(attrs, &resp, sizeof(resp));
303 if (ret)
304 goto err_uobj;
305
306 ret = ib_init_ucontext(attrs);
307 if (ret)
308 goto err_uobj;
309
310 ib_uverbs_init_async_event_file(
311 container_of(uobj, struct ib_uverbs_async_event_file, uobj));
312 rdma_alloc_commit_uobject(uobj, attrs);
313 return 0;
314
315 err_uobj:
316 rdma_alloc_abort_uobject(uobj, attrs, false);
317 err_ucontext:
318 rdma_restrack_put(&attrs->context->res);
319 kfree(attrs->context);
320 attrs->context = NULL;
321 return ret;
322 }
323
324 static void copy_query_dev_fields(struct ib_ucontext *ucontext,
325 struct ib_uverbs_query_device_resp *resp,
326 struct ib_device_attr *attr)
327 {
328 struct ib_device *ib_dev = ucontext->device;
329
330 resp->fw_ver = attr->fw_ver;
331 resp->node_guid = ib_dev->node_guid;
332 resp->sys_image_guid = attr->sys_image_guid;
333 resp->max_mr_size = attr->max_mr_size;
334 resp->page_size_cap = attr->page_size_cap;
335 resp->vendor_id = attr->vendor_id;
336 resp->vendor_part_id = attr->vendor_part_id;
337 resp->hw_ver = attr->hw_ver;
338 resp->max_qp = attr->max_qp;
339 resp->max_qp_wr = attr->max_qp_wr;
340 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags);
341 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge);
342 resp->max_sge_rd = attr->max_sge_rd;
343 resp->max_cq = attr->max_cq;
344 resp->max_cqe = attr->max_cqe;
345 resp->max_mr = attr->max_mr;
346 resp->max_pd = attr->max_pd;
347 resp->max_qp_rd_atom = attr->max_qp_rd_atom;
348 resp->max_ee_rd_atom = attr->max_ee_rd_atom;
349 resp->max_res_rd_atom = attr->max_res_rd_atom;
350 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom;
351 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom;
352 resp->atomic_cap = attr->atomic_cap;
353 resp->max_ee = attr->max_ee;
354 resp->max_rdd = attr->max_rdd;
355 resp->max_mw = attr->max_mw;
356 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
357 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
358 resp->max_mcast_grp = attr->max_mcast_grp;
359 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
360 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
361 resp->max_ah = attr->max_ah;
362 resp->max_srq = attr->max_srq;
363 resp->max_srq_wr = attr->max_srq_wr;
364 resp->max_srq_sge = attr->max_srq_sge;
365 resp->max_pkeys = attr->max_pkeys;
366 resp->local_ca_ack_delay = attr->local_ca_ack_delay;
367 resp->phys_port_cnt = min_t(u32, ib_dev->phys_port_cnt, U8_MAX);
368 }
369
370 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs)
371 {
372 struct ib_uverbs_query_device cmd;
373 struct ib_uverbs_query_device_resp resp;
374 struct ib_ucontext *ucontext;
375 int ret;
376
377 ucontext = ib_uverbs_get_ucontext(attrs);
378 if (IS_ERR(ucontext))
379 return PTR_ERR(ucontext);
380
381 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
382 if (ret)
383 return ret;
384
385 memset(&resp, 0, sizeof resp);
386 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
387
388 return uverbs_response(attrs, &resp, sizeof(resp));
389 }
390
391 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs)
392 {
393 struct ib_uverbs_query_port cmd;
394 struct ib_uverbs_query_port_resp resp;
395 struct ib_port_attr attr;
396 int ret;
397 struct ib_ucontext *ucontext;
398 struct ib_device *ib_dev;
399
400 ucontext = ib_uverbs_get_ucontext(attrs);
401 if (IS_ERR(ucontext))
402 return PTR_ERR(ucontext);
403 ib_dev = ucontext->device;
404
405 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
406 if (ret)
407 return ret;
408
409 ret = ib_query_port(ib_dev, cmd.port_num, &attr);
410 if (ret)
411 return ret;
412
413 memset(&resp, 0, sizeof resp);
414 copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num);
415
416 return uverbs_response(attrs, &resp, sizeof(resp));
417 }
418
419 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs)
420 {
421 struct ib_uverbs_alloc_pd_resp resp = {};
422 struct ib_uverbs_alloc_pd cmd;
423 struct ib_uobject *uobj;
424 struct ib_pd *pd;
425 int ret;
426 struct ib_device *ib_dev;
427
428 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
429 if (ret)
430 return ret;
431
432 uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev);
433 if (IS_ERR(uobj))
434 return PTR_ERR(uobj);
435
436 pd = rdma_zalloc_drv_obj(ib_dev, ib_pd);
437 if (!pd) {
438 ret = -ENOMEM;
439 goto err;
440 }
441
442 pd->device = ib_dev;
443 pd->uobject = uobj;
444 atomic_set(&pd->usecnt, 0);
445
446 rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD);
447 rdma_restrack_set_name(&pd->res, NULL);
448
449 ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata);
450 if (ret)
451 goto err_alloc;
452 rdma_restrack_add(&pd->res);
453
454 uobj->object = pd;
455 uobj_finalize_uobj_create(uobj, attrs);
456
457 resp.pd_handle = uobj->id;
458 return uverbs_response(attrs, &resp, sizeof(resp));
459
460 err_alloc:
461 rdma_restrack_put(&pd->res);
462 kfree(pd);
463 err:
464 uobj_alloc_abort(uobj, attrs);
465 return ret;
466 }
467
468 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs)
469 {
470 struct ib_uverbs_dealloc_pd cmd;
471 int ret;
472
473 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
474 if (ret)
475 return ret;
476
477 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
478 }
479
480 struct xrcd_table_entry {
481 struct rb_node node;
482 struct ib_xrcd *xrcd;
483 struct inode *inode;
484 };
485
486 static int xrcd_table_insert(struct ib_uverbs_device *dev,
487 struct inode *inode,
488 struct ib_xrcd *xrcd)
489 {
490 struct xrcd_table_entry *entry, *scan;
491 struct rb_node **p = &dev->xrcd_tree.rb_node;
492 struct rb_node *parent = NULL;
493
494 entry = kmalloc(sizeof *entry, GFP_KERNEL);
495 if (!entry)
496 return -ENOMEM;
497
498 entry->xrcd = xrcd;
499 entry->inode = inode;
500
501 while (*p) {
502 parent = *p;
503 scan = rb_entry(parent, struct xrcd_table_entry, node);
504
505 if (inode < scan->inode) {
506 p = &(*p)->rb_left;
507 } else if (inode > scan->inode) {
508 p = &(*p)->rb_right;
509 } else {
510 kfree(entry);
511 return -EEXIST;
512 }
513 }
514
515 rb_link_node(&entry->node, parent, p);
516 rb_insert_color(&entry->node, &dev->xrcd_tree);
517 igrab(inode);
518 return 0;
519 }
520
521 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
522 struct inode *inode)
523 {
524 struct xrcd_table_entry *entry;
525 struct rb_node *p = dev->xrcd_tree.rb_node;
526
527 while (p) {
528 entry = rb_entry(p, struct xrcd_table_entry, node);
529
530 if (inode < entry->inode)
531 p = p->rb_left;
532 else if (inode > entry->inode)
533 p = p->rb_right;
534 else
535 return entry;
536 }
537
538 return NULL;
539 }
540
541 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
542 {
543 struct xrcd_table_entry *entry;
544
545 entry = xrcd_table_search(dev, inode);
546 if (!entry)
547 return NULL;
548
549 return entry->xrcd;
550 }
551
552 static void xrcd_table_delete(struct ib_uverbs_device *dev,
553 struct inode *inode)
554 {
555 struct xrcd_table_entry *entry;
556
557 entry = xrcd_table_search(dev, inode);
558 if (entry) {
559 iput(inode);
560 rb_erase(&entry->node, &dev->xrcd_tree);
561 kfree(entry);
562 }
563 }
564
565 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs)
566 {
567 struct ib_uverbs_device *ibudev = attrs->ufile->device;
568 struct ib_uverbs_open_xrcd_resp resp = {};
569 struct ib_uverbs_open_xrcd cmd;
570 struct ib_uxrcd_object *obj;
571 struct ib_xrcd *xrcd = NULL;
572 struct inode *inode = NULL;
573 int new_xrcd = 0;
574 struct ib_device *ib_dev;
575 struct fd f = EMPTY_FD;
576 int ret;
577
578 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
579 if (ret)
580 return ret;
581
582 mutex_lock(&ibudev->xrcd_tree_mutex);
583
584 if (cmd.fd != -1) {
585 /* search for file descriptor */
586 f = fdget(cmd.fd);
587 if (fd_empty(f)) {
588 ret = -EBADF;
589 goto err_tree_mutex_unlock;
590 }
591
592 inode = file_inode(fd_file(f));
593 xrcd = find_xrcd(ibudev, inode);
594 if (!xrcd && !(cmd.oflags & O_CREAT)) {
595 /* no file descriptor. Need CREATE flag */
596 ret = -EAGAIN;
597 goto err_tree_mutex_unlock;
598 }
599
600 if (xrcd && cmd.oflags & O_EXCL) {
601 ret = -EINVAL;
602 goto err_tree_mutex_unlock;
603 }
604 }
605
606 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs,
607 &ib_dev);
608 if (IS_ERR(obj)) {
609 ret = PTR_ERR(obj);
610 goto err_tree_mutex_unlock;
611 }
612
613 if (!xrcd) {
614 xrcd = ib_alloc_xrcd_user(ib_dev, inode, &attrs->driver_udata);
615 if (IS_ERR(xrcd)) {
616 ret = PTR_ERR(xrcd);
617 goto err;
618 }
619 new_xrcd = 1;
620 }
621
622 atomic_set(&obj->refcnt, 0);
623 obj->uobject.object = xrcd;
624
625 if (inode) {
626 if (new_xrcd) {
627 /* create new inode/xrcd table entry */
628 ret = xrcd_table_insert(ibudev, inode, xrcd);
629 if (ret)
630 goto err_dealloc_xrcd;
631 }
632 atomic_inc(&xrcd->usecnt);
633 }
634
635 fdput(f);
636
637 mutex_unlock(&ibudev->xrcd_tree_mutex);
638 uobj_finalize_uobj_create(&obj->uobject, attrs);
639
640 resp.xrcd_handle = obj->uobject.id;
641 return uverbs_response(attrs, &resp, sizeof(resp));
642
643 err_dealloc_xrcd:
644 ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs));
645
646 err:
647 uobj_alloc_abort(&obj->uobject, attrs);
648
649 err_tree_mutex_unlock:
650 fdput(f);
651
652 mutex_unlock(&ibudev->xrcd_tree_mutex);
653
654 return ret;
655 }
656
657 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs)
658 {
659 struct ib_uverbs_close_xrcd cmd;
660 int ret;
661
662 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
663 if (ret)
664 return ret;
665
666 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs);
667 }
668
669 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd,
670 enum rdma_remove_reason why,
671 struct uverbs_attr_bundle *attrs)
672 {
673 struct inode *inode;
674 int ret;
675 struct ib_uverbs_device *dev = attrs->ufile->device;
676
677 inode = xrcd->inode;
678 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
679 return 0;
680
681 ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata);
682 if (ret) {
683 atomic_inc(&xrcd->usecnt);
684 return ret;
685 }
686
687 if (inode)
688 xrcd_table_delete(dev, inode);
689
690 return 0;
691 }
692
693 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
694 {
695 struct ib_uverbs_reg_mr_resp resp = {};
696 struct ib_uverbs_reg_mr cmd;
697 struct ib_uobject *uobj;
698 struct ib_pd *pd;
699 struct ib_mr *mr;
700 int ret;
701 struct ib_device *ib_dev;
702
703 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
704 if (ret)
705 return ret;
706
707 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
708 return -EINVAL;
709
710 uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
711 if (IS_ERR(uobj))
712 return PTR_ERR(uobj);
713
714 ret = ib_check_mr_access(ib_dev, cmd.access_flags);
715 if (ret)
716 goto err_free;
717
718 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
719 if (!pd) {
720 ret = -EINVAL;
721 goto err_free;
722 }
723
724 mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
725 cmd.access_flags,
726 &attrs->driver_udata);
727 if (IS_ERR(mr)) {
728 ret = PTR_ERR(mr);
729 goto err_put;
730 }
731
732 mr->device = pd->device;
733 mr->pd = pd;
734 mr->type = IB_MR_TYPE_USER;
735 mr->dm = NULL;
736 mr->sig_attrs = NULL;
737 mr->uobject = uobj;
738 atomic_inc(&pd->usecnt);
739 mr->iova = cmd.hca_va;
740 mr->length = cmd.length;
741
742 rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
743 rdma_restrack_set_name(&mr->res, NULL);
744 rdma_restrack_add(&mr->res);
745
746 uobj->object = mr;
747 uobj_put_obj_read(pd);
748 uobj_finalize_uobj_create(uobj, attrs);
749
750 resp.lkey = mr->lkey;
751 resp.rkey = mr->rkey;
752 resp.mr_handle = uobj->id;
753 return uverbs_response(attrs, &resp, sizeof(resp));
754
755 err_put:
756 uobj_put_obj_read(pd);
757 err_free:
758 uobj_alloc_abort(uobj, attrs);
759 return ret;
760 }
761
762 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
763 {
764 struct ib_uverbs_rereg_mr cmd;
765 struct ib_uverbs_rereg_mr_resp resp;
766 struct ib_mr *mr;
767 int ret;
768 struct ib_uobject *uobj;
769 struct ib_uobject *new_uobj;
770 struct ib_device *ib_dev;
771 struct ib_pd *orig_pd;
772 struct ib_pd *new_pd;
773 struct ib_mr *new_mr;
774
775 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
776 if (ret)
777 return ret;
778
779 if (!cmd.flags)
780 return -EINVAL;
781
782 if (cmd.flags & ~IB_MR_REREG_SUPPORTED)
783 return -EOPNOTSUPP;
784
785 if ((cmd.flags & IB_MR_REREG_TRANS) &&
786 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
787 return -EINVAL;
788
789 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
790 if (IS_ERR(uobj))
791 return PTR_ERR(uobj);
792
793 mr = uobj->object;
794
795 if (mr->dm) {
796 ret = -EINVAL;
797 goto put_uobjs;
798 }
799
800 if (cmd.flags & IB_MR_REREG_ACCESS) {
801 ret = ib_check_mr_access(mr->device, cmd.access_flags);
802 if (ret)
803 goto put_uobjs;
804 }
805
806 orig_pd = mr->pd;
807 if (cmd.flags & IB_MR_REREG_PD) {
808 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
809 attrs);
810 if (!new_pd) {
811 ret = -EINVAL;
812 goto put_uobjs;
813 }
814 } else {
815 new_pd = mr->pd;
816 }
817
818 /*
819 * The driver might create a new HW object as part of the rereg, we need
820 * to have a uobject ready to hold it.
821 */
822 new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
823 if (IS_ERR(new_uobj)) {
824 ret = PTR_ERR(new_uobj);
825 goto put_uobj_pd;
826 }
827
828 new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length,
829 cmd.hca_va, cmd.access_flags, new_pd,
830 &attrs->driver_udata);
831 if (IS_ERR(new_mr)) {
832 ret = PTR_ERR(new_mr);
833 goto put_new_uobj;
834 }
835 if (new_mr) {
836 new_mr->device = new_pd->device;
837 new_mr->pd = new_pd;
838 new_mr->type = IB_MR_TYPE_USER;
839 new_mr->uobject = uobj;
840 atomic_inc(&new_pd->usecnt);
841 new_uobj->object = new_mr;
842
843 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR);
844 rdma_restrack_set_name(&new_mr->res, NULL);
845 rdma_restrack_add(&new_mr->res);
846
847 /*
848 * The new uobj for the new HW object is put into the same spot
849 * in the IDR and the old uobj & HW object is deleted.
850 */
851 rdma_assign_uobject(uobj, new_uobj, attrs);
852 rdma_alloc_commit_uobject(new_uobj, attrs);
853 uobj_put_destroy(uobj);
854 new_uobj = NULL;
855 uobj = NULL;
856 mr = new_mr;
857 } else {
858 if (cmd.flags & IB_MR_REREG_PD) {
859 atomic_dec(&orig_pd->usecnt);
860 mr->pd = new_pd;
861 atomic_inc(&new_pd->usecnt);
862 }
863 if (cmd.flags & IB_MR_REREG_TRANS) {
864 mr->iova = cmd.hca_va;
865 mr->length = cmd.length;
866 }
867 }
868
869 memset(&resp, 0, sizeof(resp));
870 resp.lkey = mr->lkey;
871 resp.rkey = mr->rkey;
872
873 ret = uverbs_response(attrs, &resp, sizeof(resp));
874
875 put_new_uobj:
876 if (new_uobj)
877 uobj_alloc_abort(new_uobj, attrs);
878 put_uobj_pd:
879 if (cmd.flags & IB_MR_REREG_PD)
880 uobj_put_obj_read(new_pd);
881
882 put_uobjs:
883 if (uobj)
884 uobj_put_write(uobj);
885
886 return ret;
887 }
888
889 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
890 {
891 struct ib_uverbs_dereg_mr cmd;
892 int ret;
893
894 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
895 if (ret)
896 return ret;
897
898 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
899 }
900
901 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
902 {
903 struct ib_uverbs_alloc_mw cmd;
904 struct ib_uverbs_alloc_mw_resp resp = {};
905 struct ib_uobject *uobj;
906 struct ib_pd *pd;
907 struct ib_mw *mw;
908 int ret;
909 struct ib_device *ib_dev;
910
911 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
912 if (ret)
913 return ret;
914
915 uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
916 if (IS_ERR(uobj))
917 return PTR_ERR(uobj);
918
919 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
920 if (!pd) {
921 ret = -EINVAL;
922 goto err_free;
923 }
924
925 if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) {
926 ret = -EINVAL;
927 goto err_put;
928 }
929
930 mw = rdma_zalloc_drv_obj(ib_dev, ib_mw);
931 if (!mw) {
932 ret = -ENOMEM;
933 goto err_put;
934 }
935
936 mw->device = ib_dev;
937 mw->pd = pd;
938 mw->uobject = uobj;
939 mw->type = cmd.mw_type;
940
941 ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata);
942 if (ret)
943 goto err_alloc;
944
945 atomic_inc(&pd->usecnt);
946
947 uobj->object = mw;
948 uobj_put_obj_read(pd);
949 uobj_finalize_uobj_create(uobj, attrs);
950
951 resp.rkey = mw->rkey;
952 resp.mw_handle = uobj->id;
953 return uverbs_response(attrs, &resp, sizeof(resp));
954
955 err_alloc:
956 kfree(mw);
957 err_put:
958 uobj_put_obj_read(pd);
959 err_free:
960 uobj_alloc_abort(uobj, attrs);
961 return ret;
962 }
963
964 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
965 {
966 struct ib_uverbs_dealloc_mw cmd;
967 int ret;
968
969 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
970 if (ret)
971 return ret;
972
973 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
974 }
975
976 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
977 {
978 struct ib_uverbs_create_comp_channel cmd;
979 struct ib_uverbs_create_comp_channel_resp resp;
980 struct ib_uobject *uobj;
981 struct ib_uverbs_completion_event_file *ev_file;
982 struct ib_device *ib_dev;
983 int ret;
984
985 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
986 if (ret)
987 return ret;
988
989 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
990 if (IS_ERR(uobj))
991 return PTR_ERR(uobj);
992
993 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
994 uobj);
995 ib_uverbs_init_event_queue(&ev_file->ev_queue);
996 uobj_finalize_uobj_create(uobj, attrs);
997
998 resp.fd = uobj->id;
999 return uverbs_response(attrs, &resp, sizeof(resp));
1000 }
1001
1002 static int create_cq(struct uverbs_attr_bundle *attrs,
1003 struct ib_uverbs_ex_create_cq *cmd)
1004 {
1005 struct ib_ucq_object *obj;
1006 struct ib_uverbs_completion_event_file *ev_file = NULL;
1007 struct ib_cq *cq;
1008 int ret;
1009 struct ib_uverbs_ex_create_cq_resp resp = {};
1010 struct ib_cq_init_attr attr = {};
1011 struct ib_device *ib_dev;
1012
1013 if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
1014 return -EINVAL;
1015
1016 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
1017 &ib_dev);
1018 if (IS_ERR(obj))
1019 return PTR_ERR(obj);
1020
1021 if (cmd->comp_channel >= 0) {
1022 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
1023 if (IS_ERR(ev_file)) {
1024 ret = PTR_ERR(ev_file);
1025 goto err;
1026 }
1027 }
1028
1029 obj->uevent.uobject.user_handle = cmd->user_handle;
1030 INIT_LIST_HEAD(&obj->comp_list);
1031 INIT_LIST_HEAD(&obj->uevent.event_list);
1032
1033 attr.cqe = cmd->cqe;
1034 attr.comp_vector = cmd->comp_vector;
1035 attr.flags = cmd->flags;
1036
1037 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
1038 if (!cq) {
1039 ret = -ENOMEM;
1040 goto err_file;
1041 }
1042 cq->device = ib_dev;
1043 cq->uobject = obj;
1044 cq->comp_handler = ib_uverbs_comp_handler;
1045 cq->event_handler = ib_uverbs_cq_event_handler;
1046 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL;
1047 atomic_set(&cq->usecnt, 0);
1048
1049 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);
1050 rdma_restrack_set_name(&cq->res, NULL);
1051
1052 ret = ib_dev->ops.create_cq(cq, &attr, attrs);
1053 if (ret)
1054 goto err_free;
1055 rdma_restrack_add(&cq->res);
1056
1057 obj->uevent.uobject.object = cq;
1058 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1059 if (obj->uevent.event_file)
1060 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1061 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1062
1063 resp.base.cq_handle = obj->uevent.uobject.id;
1064 resp.base.cqe = cq->cqe;
1065 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1066 return uverbs_response(attrs, &resp, sizeof(resp));
1067
1068 err_free:
1069 rdma_restrack_put(&cq->res);
1070 kfree(cq);
1071 err_file:
1072 if (ev_file)
1073 ib_uverbs_release_ucq(ev_file, obj);
1074 err:
1075 uobj_alloc_abort(&obj->uevent.uobject, attrs);
1076 return ret;
1077 }
1078
1079 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1080 {
1081 struct ib_uverbs_create_cq cmd;
1082 struct ib_uverbs_ex_create_cq cmd_ex;
1083 int ret;
1084
1085 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1086 if (ret)
1087 return ret;
1088
1089 memset(&cmd_ex, 0, sizeof(cmd_ex));
1090 cmd_ex.user_handle = cmd.user_handle;
1091 cmd_ex.cqe = cmd.cqe;
1092 cmd_ex.comp_vector = cmd.comp_vector;
1093 cmd_ex.comp_channel = cmd.comp_channel;
1094
1095 return create_cq(attrs, &cmd_ex);
1096 }
1097
1098 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1099 {
1100 struct ib_uverbs_ex_create_cq cmd;
1101 int ret;
1102
1103 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1104 if (ret)
1105 return ret;
1106
1107 if (cmd.comp_mask)
1108 return -EINVAL;
1109
1110 if (cmd.reserved)
1111 return -EINVAL;
1112
1113 return create_cq(attrs, &cmd);
1114 }
1115
1116 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1117 {
1118 struct ib_uverbs_resize_cq cmd;
1119 struct ib_uverbs_resize_cq_resp resp = {};
1120 struct ib_cq *cq;
1121 int ret;
1122
1123 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1124 if (ret)
1125 return ret;
1126
1127 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1128 if (!cq)
1129 return -EINVAL;
1130
1131 ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1132 if (ret)
1133 goto out;
1134
1135 resp.cqe = cq->cqe;
1136
1137 ret = uverbs_response(attrs, &resp, sizeof(resp));
1138 out:
1139 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1140 UVERBS_LOOKUP_READ);
1141
1142 return ret;
1143 }
1144
1145 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1146 struct ib_wc *wc)
1147 {
1148 struct ib_uverbs_wc tmp;
1149
1150 tmp.wr_id = wc->wr_id;
1151 tmp.status = wc->status;
1152 tmp.opcode = wc->opcode;
1153 tmp.vendor_err = wc->vendor_err;
1154 tmp.byte_len = wc->byte_len;
1155 tmp.ex.imm_data = wc->ex.imm_data;
1156 tmp.qp_num = wc->qp->qp_num;
1157 tmp.src_qp = wc->src_qp;
1158 tmp.wc_flags = wc->wc_flags;
1159 tmp.pkey_index = wc->pkey_index;
1160 if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1161 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid);
1162 else
1163 tmp.slid = ib_lid_cpu16(wc->slid);
1164 tmp.sl = wc->sl;
1165 tmp.dlid_path_bits = wc->dlid_path_bits;
1166 tmp.port_num = wc->port_num;
1167 tmp.reserved = 0;
1168
1169 if (copy_to_user(dest, &tmp, sizeof tmp))
1170 return -EFAULT;
1171
1172 return 0;
1173 }
1174
1175 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1176 {
1177 struct ib_uverbs_poll_cq cmd;
1178 struct ib_uverbs_poll_cq_resp resp;
1179 u8 __user *header_ptr;
1180 u8 __user *data_ptr;
1181 struct ib_cq *cq;
1182 struct ib_wc wc;
1183 int ret;
1184
1185 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1186 if (ret)
1187 return ret;
1188
1189 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1190 if (!cq)
1191 return -EINVAL;
1192
1193 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1194 header_ptr = attrs->ucore.outbuf;
1195 data_ptr = header_ptr + sizeof resp;
1196
1197 memset(&resp, 0, sizeof resp);
1198 while (resp.count < cmd.ne) {
1199 ret = ib_poll_cq(cq, 1, &wc);
1200 if (ret < 0)
1201 goto out_put;
1202 if (!ret)
1203 break;
1204
1205 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1206 if (ret)
1207 goto out_put;
1208
1209 data_ptr += sizeof(struct ib_uverbs_wc);
1210 ++resp.count;
1211 }
1212
1213 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1214 ret = -EFAULT;
1215 goto out_put;
1216 }
1217 ret = 0;
1218
1219 if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
1220 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT);
1221
1222 out_put:
1223 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1224 UVERBS_LOOKUP_READ);
1225 return ret;
1226 }
1227
1228 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1229 {
1230 struct ib_uverbs_req_notify_cq cmd;
1231 struct ib_cq *cq;
1232 int ret;
1233
1234 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1235 if (ret)
1236 return ret;
1237
1238 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1239 if (!cq)
1240 return -EINVAL;
1241
1242 ib_req_notify_cq(cq, cmd.solicited_only ?
1243 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1244
1245 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1246 UVERBS_LOOKUP_READ);
1247 return 0;
1248 }
1249
1250 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1251 {
1252 struct ib_uverbs_destroy_cq cmd;
1253 struct ib_uverbs_destroy_cq_resp resp;
1254 struct ib_uobject *uobj;
1255 struct ib_ucq_object *obj;
1256 int ret;
1257
1258 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1259 if (ret)
1260 return ret;
1261
1262 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1263 if (IS_ERR(uobj))
1264 return PTR_ERR(uobj);
1265
1266 obj = container_of(uobj, struct ib_ucq_object, uevent.uobject);
1267 memset(&resp, 0, sizeof(resp));
1268 resp.comp_events_reported = obj->comp_events_reported;
1269 resp.async_events_reported = obj->uevent.events_reported;
1270
1271 uobj_put_destroy(uobj);
1272
1273 return uverbs_response(attrs, &resp, sizeof(resp));
1274 }
1275
1276 static int create_qp(struct uverbs_attr_bundle *attrs,
1277 struct ib_uverbs_ex_create_qp *cmd)
1278 {
1279 struct ib_uqp_object *obj;
1280 struct ib_device *device;
1281 struct ib_pd *pd = NULL;
1282 struct ib_xrcd *xrcd = NULL;
1283 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT);
1284 struct ib_cq *scq = NULL, *rcq = NULL;
1285 struct ib_srq *srq = NULL;
1286 struct ib_qp *qp;
1287 struct ib_qp_init_attr attr = {};
1288 struct ib_uverbs_ex_create_qp_resp resp = {};
1289 int ret;
1290 struct ib_rwq_ind_table *ind_tbl = NULL;
1291 bool has_sq = true;
1292 struct ib_device *ib_dev;
1293
1294 switch (cmd->qp_type) {
1295 case IB_QPT_RAW_PACKET:
1296 if (!capable(CAP_NET_RAW))
1297 return -EPERM;
1298 break;
1299 case IB_QPT_RC:
1300 case IB_QPT_UC:
1301 case IB_QPT_UD:
1302 case IB_QPT_XRC_INI:
1303 case IB_QPT_XRC_TGT:
1304 case IB_QPT_DRIVER:
1305 break;
1306 default:
1307 return -EINVAL;
1308 }
1309
1310 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1311 &ib_dev);
1312 if (IS_ERR(obj))
1313 return PTR_ERR(obj);
1314 obj->uxrcd = NULL;
1315 obj->uevent.uobject.user_handle = cmd->user_handle;
1316 mutex_init(&obj->mcast_lock);
1317
1318 if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1319 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1320 UVERBS_OBJECT_RWQ_IND_TBL,
1321 cmd->rwq_ind_tbl_handle, attrs);
1322 if (!ind_tbl) {
1323 ret = -EINVAL;
1324 goto err_put;
1325 }
1326
1327 attr.rwq_ind_tbl = ind_tbl;
1328 }
1329
1330 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1331 ret = -EINVAL;
1332 goto err_put;
1333 }
1334
1335 if (ind_tbl && !cmd->max_send_wr)
1336 has_sq = false;
1337
1338 if (cmd->qp_type == IB_QPT_XRC_TGT) {
1339 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1340 attrs);
1341
1342 if (IS_ERR(xrcd_uobj)) {
1343 ret = -EINVAL;
1344 goto err_put;
1345 }
1346
1347 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1348 if (!xrcd) {
1349 ret = -EINVAL;
1350 goto err_put;
1351 }
1352 device = xrcd->device;
1353 } else {
1354 if (cmd->qp_type == IB_QPT_XRC_INI) {
1355 cmd->max_recv_wr = 0;
1356 cmd->max_recv_sge = 0;
1357 } else {
1358 if (cmd->is_srq) {
1359 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1360 cmd->srq_handle, attrs);
1361 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1362 ret = -EINVAL;
1363 goto err_put;
1364 }
1365 }
1366
1367 if (!ind_tbl) {
1368 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1369 rcq = uobj_get_obj_read(
1370 cq, UVERBS_OBJECT_CQ,
1371 cmd->recv_cq_handle, attrs);
1372 if (!rcq) {
1373 ret = -EINVAL;
1374 goto err_put;
1375 }
1376 }
1377 }
1378 }
1379
1380 if (has_sq)
1381 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1382 cmd->send_cq_handle, attrs);
1383 if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI)
1384 rcq = rcq ?: scq;
1385 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1386 attrs);
1387 if (!pd || (!scq && has_sq)) {
1388 ret = -EINVAL;
1389 goto err_put;
1390 }
1391
1392 device = pd->device;
1393 }
1394
1395 attr.event_handler = ib_uverbs_qp_event_handler;
1396 attr.send_cq = scq;
1397 attr.recv_cq = rcq;
1398 attr.srq = srq;
1399 attr.xrcd = xrcd;
1400 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1401 IB_SIGNAL_REQ_WR;
1402 attr.qp_type = cmd->qp_type;
1403
1404 attr.cap.max_send_wr = cmd->max_send_wr;
1405 attr.cap.max_recv_wr = cmd->max_recv_wr;
1406 attr.cap.max_send_sge = cmd->max_send_sge;
1407 attr.cap.max_recv_sge = cmd->max_recv_sge;
1408 attr.cap.max_inline_data = cmd->max_inline_data;
1409
1410 INIT_LIST_HEAD(&obj->uevent.event_list);
1411 INIT_LIST_HEAD(&obj->mcast_list);
1412
1413 attr.create_flags = cmd->create_flags;
1414 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1415 IB_QP_CREATE_CROSS_CHANNEL |
1416 IB_QP_CREATE_MANAGED_SEND |
1417 IB_QP_CREATE_MANAGED_RECV |
1418 IB_QP_CREATE_SCATTER_FCS |
1419 IB_QP_CREATE_CVLAN_STRIPPING |
1420 IB_QP_CREATE_SOURCE_QPN |
1421 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1422 ret = -EINVAL;
1423 goto err_put;
1424 }
1425
1426 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1427 if (!capable(CAP_NET_RAW)) {
1428 ret = -EPERM;
1429 goto err_put;
1430 }
1431
1432 attr.source_qpn = cmd->source_qpn;
1433 }
1434
1435 qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj,
1436 KBUILD_MODNAME);
1437 if (IS_ERR(qp)) {
1438 ret = PTR_ERR(qp);
1439 goto err_put;
1440 }
1441 ib_qp_usecnt_inc(qp);
1442
1443 obj->uevent.uobject.object = qp;
1444 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1445 if (obj->uevent.event_file)
1446 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1447
1448 if (xrcd) {
1449 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1450 uobject);
1451 atomic_inc(&obj->uxrcd->refcnt);
1452 uobj_put_read(xrcd_uobj);
1453 }
1454
1455 if (pd)
1456 uobj_put_obj_read(pd);
1457 if (scq)
1458 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1459 UVERBS_LOOKUP_READ);
1460 if (rcq && rcq != scq)
1461 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1462 UVERBS_LOOKUP_READ);
1463 if (srq)
1464 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1465 UVERBS_LOOKUP_READ);
1466 if (ind_tbl)
1467 uobj_put_obj_read(ind_tbl);
1468 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1469
1470 resp.base.qpn = qp->qp_num;
1471 resp.base.qp_handle = obj->uevent.uobject.id;
1472 resp.base.max_recv_sge = attr.cap.max_recv_sge;
1473 resp.base.max_send_sge = attr.cap.max_send_sge;
1474 resp.base.max_recv_wr = attr.cap.max_recv_wr;
1475 resp.base.max_send_wr = attr.cap.max_send_wr;
1476 resp.base.max_inline_data = attr.cap.max_inline_data;
1477 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1478 return uverbs_response(attrs, &resp, sizeof(resp));
1479
1480 err_put:
1481 if (!IS_ERR(xrcd_uobj))
1482 uobj_put_read(xrcd_uobj);
1483 if (pd)
1484 uobj_put_obj_read(pd);
1485 if (scq)
1486 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1487 UVERBS_LOOKUP_READ);
1488 if (rcq && rcq != scq)
1489 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1490 UVERBS_LOOKUP_READ);
1491 if (srq)
1492 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1493 UVERBS_LOOKUP_READ);
1494 if (ind_tbl)
1495 uobj_put_obj_read(ind_tbl);
1496
1497 uobj_alloc_abort(&obj->uevent.uobject, attrs);
1498 return ret;
1499 }
1500
1501 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1502 {
1503 struct ib_uverbs_create_qp cmd;
1504 struct ib_uverbs_ex_create_qp cmd_ex;
1505 int ret;
1506
1507 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1508 if (ret)
1509 return ret;
1510
1511 memset(&cmd_ex, 0, sizeof(cmd_ex));
1512 cmd_ex.user_handle = cmd.user_handle;
1513 cmd_ex.pd_handle = cmd.pd_handle;
1514 cmd_ex.send_cq_handle = cmd.send_cq_handle;
1515 cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1516 cmd_ex.srq_handle = cmd.srq_handle;
1517 cmd_ex.max_send_wr = cmd.max_send_wr;
1518 cmd_ex.max_recv_wr = cmd.max_recv_wr;
1519 cmd_ex.max_send_sge = cmd.max_send_sge;
1520 cmd_ex.max_recv_sge = cmd.max_recv_sge;
1521 cmd_ex.max_inline_data = cmd.max_inline_data;
1522 cmd_ex.sq_sig_all = cmd.sq_sig_all;
1523 cmd_ex.qp_type = cmd.qp_type;
1524 cmd_ex.is_srq = cmd.is_srq;
1525
1526 return create_qp(attrs, &cmd_ex);
1527 }
1528
1529 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1530 {
1531 struct ib_uverbs_ex_create_qp cmd;
1532 int ret;
1533
1534 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1535 if (ret)
1536 return ret;
1537
1538 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1539 return -EINVAL;
1540
1541 if (cmd.reserved)
1542 return -EINVAL;
1543
1544 return create_qp(attrs, &cmd);
1545 }
1546
1547 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1548 {
1549 struct ib_uverbs_create_qp_resp resp = {};
1550 struct ib_uverbs_open_qp cmd;
1551 struct ib_uqp_object *obj;
1552 struct ib_xrcd *xrcd;
1553 struct ib_qp *qp;
1554 struct ib_qp_open_attr attr = {};
1555 int ret;
1556 struct ib_uobject *xrcd_uobj;
1557 struct ib_device *ib_dev;
1558
1559 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1560 if (ret)
1561 return ret;
1562
1563 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1564 &ib_dev);
1565 if (IS_ERR(obj))
1566 return PTR_ERR(obj);
1567
1568 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1569 if (IS_ERR(xrcd_uobj)) {
1570 ret = -EINVAL;
1571 goto err_put;
1572 }
1573
1574 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1575 if (!xrcd) {
1576 ret = -EINVAL;
1577 goto err_xrcd;
1578 }
1579
1580 attr.event_handler = ib_uverbs_qp_event_handler;
1581 attr.qp_num = cmd.qpn;
1582 attr.qp_type = cmd.qp_type;
1583
1584 INIT_LIST_HEAD(&obj->uevent.event_list);
1585 INIT_LIST_HEAD(&obj->mcast_list);
1586
1587 qp = ib_open_qp(xrcd, &attr);
1588 if (IS_ERR(qp)) {
1589 ret = PTR_ERR(qp);
1590 goto err_xrcd;
1591 }
1592
1593 obj->uevent.uobject.object = qp;
1594 obj->uevent.uobject.user_handle = cmd.user_handle;
1595
1596 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1597 atomic_inc(&obj->uxrcd->refcnt);
1598 qp->uobject = obj;
1599 uobj_put_read(xrcd_uobj);
1600 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1601
1602 resp.qpn = qp->qp_num;
1603 resp.qp_handle = obj->uevent.uobject.id;
1604 return uverbs_response(attrs, &resp, sizeof(resp));
1605
1606 err_xrcd:
1607 uobj_put_read(xrcd_uobj);
1608 err_put:
1609 uobj_alloc_abort(&obj->uevent.uobject, attrs);
1610 return ret;
1611 }
1612
1613 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1614 struct rdma_ah_attr *rdma_attr)
1615 {
1616 const struct ib_global_route *grh;
1617
1618 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr);
1619 uverb_attr->sl = rdma_ah_get_sl(rdma_attr);
1620 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr);
1621 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr);
1622 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) &
1623 IB_AH_GRH);
1624 if (uverb_attr->is_global) {
1625 grh = rdma_ah_read_grh(rdma_attr);
1626 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1627 uverb_attr->flow_label = grh->flow_label;
1628 uverb_attr->sgid_index = grh->sgid_index;
1629 uverb_attr->hop_limit = grh->hop_limit;
1630 uverb_attr->traffic_class = grh->traffic_class;
1631 }
1632 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr);
1633 }
1634
1635 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1636 {
1637 struct ib_uverbs_query_qp cmd;
1638 struct ib_uverbs_query_qp_resp resp;
1639 struct ib_qp *qp;
1640 struct ib_qp_attr *attr;
1641 struct ib_qp_init_attr *init_attr;
1642 int ret;
1643
1644 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1645 if (ret)
1646 return ret;
1647
1648 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1649 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1650 if (!attr || !init_attr) {
1651 ret = -ENOMEM;
1652 goto out;
1653 }
1654
1655 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1656 if (!qp) {
1657 ret = -EINVAL;
1658 goto out;
1659 }
1660
1661 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1662
1663 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1664 UVERBS_LOOKUP_READ);
1665
1666 if (ret)
1667 goto out;
1668
1669 memset(&resp, 0, sizeof resp);
1670
1671 resp.qp_state = attr->qp_state;
1672 resp.cur_qp_state = attr->cur_qp_state;
1673 resp.path_mtu = attr->path_mtu;
1674 resp.path_mig_state = attr->path_mig_state;
1675 resp.qkey = attr->qkey;
1676 resp.rq_psn = attr->rq_psn;
1677 resp.sq_psn = attr->sq_psn;
1678 resp.dest_qp_num = attr->dest_qp_num;
1679 resp.qp_access_flags = attr->qp_access_flags;
1680 resp.pkey_index = attr->pkey_index;
1681 resp.alt_pkey_index = attr->alt_pkey_index;
1682 resp.sq_draining = attr->sq_draining;
1683 resp.max_rd_atomic = attr->max_rd_atomic;
1684 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1685 resp.min_rnr_timer = attr->min_rnr_timer;
1686 resp.port_num = attr->port_num;
1687 resp.timeout = attr->timeout;
1688 resp.retry_cnt = attr->retry_cnt;
1689 resp.rnr_retry = attr->rnr_retry;
1690 resp.alt_port_num = attr->alt_port_num;
1691 resp.alt_timeout = attr->alt_timeout;
1692
1693 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1694 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1695
1696 resp.max_send_wr = init_attr->cap.max_send_wr;
1697 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1698 resp.max_send_sge = init_attr->cap.max_send_sge;
1699 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1700 resp.max_inline_data = init_attr->cap.max_inline_data;
1701 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1702
1703 ret = uverbs_response(attrs, &resp, sizeof(resp));
1704
1705 out:
1706 kfree(attr);
1707 kfree(init_attr);
1708
1709 return ret;
1710 }
1711
1712 /* Remove ignored fields set in the attribute mask */
1713 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1714 {
1715 switch (qp_type) {
1716 case IB_QPT_XRC_INI:
1717 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1718 case IB_QPT_XRC_TGT:
1719 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1720 IB_QP_RNR_RETRY);
1721 default:
1722 return mask;
1723 }
1724 }
1725
1726 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1727 struct rdma_ah_attr *rdma_attr,
1728 struct ib_uverbs_qp_dest *uverb_attr)
1729 {
1730 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1731 if (uverb_attr->is_global) {
1732 rdma_ah_set_grh(rdma_attr, NULL,
1733 uverb_attr->flow_label,
1734 uverb_attr->sgid_index,
1735 uverb_attr->hop_limit,
1736 uverb_attr->traffic_class);
1737 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1738 } else {
1739 rdma_ah_set_ah_flags(rdma_attr, 0);
1740 }
1741 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1742 rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1743 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1744 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1745 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1746 rdma_ah_set_make_grd(rdma_attr, false);
1747 }
1748
1749 static int modify_qp(struct uverbs_attr_bundle *attrs,
1750 struct ib_uverbs_ex_modify_qp *cmd)
1751 {
1752 struct ib_qp_attr *attr;
1753 struct ib_qp *qp;
1754 int ret;
1755
1756 attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1757 if (!attr)
1758 return -ENOMEM;
1759
1760 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1761 attrs);
1762 if (!qp) {
1763 ret = -EINVAL;
1764 goto out;
1765 }
1766
1767 if ((cmd->base.attr_mask & IB_QP_PORT) &&
1768 !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1769 ret = -EINVAL;
1770 goto release_qp;
1771 }
1772
1773 if ((cmd->base.attr_mask & IB_QP_AV)) {
1774 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1775 ret = -EINVAL;
1776 goto release_qp;
1777 }
1778
1779 if (cmd->base.attr_mask & IB_QP_STATE &&
1780 cmd->base.qp_state == IB_QPS_RTR) {
1781 /* We are in INIT->RTR TRANSITION (if we are not,
1782 * this transition will be rejected in subsequent checks).
1783 * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1784 * but the IB_QP_STATE flag is required.
1785 *
1786 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1787 * when IB_QP_AV is set, has required inclusion of a valid
1788 * port number in the primary AV. (AVs are created and handled
1789 * differently for infiniband and ethernet (RoCE) ports).
1790 *
1791 * Check the port number included in the primary AV against
1792 * the port number in the qp struct, which was set (and saved)
1793 * in the RST->INIT transition.
1794 */
1795 if (cmd->base.dest.port_num != qp->real_qp->port) {
1796 ret = -EINVAL;
1797 goto release_qp;
1798 }
1799 } else {
1800 /* We are in SQD->SQD. (If we are not, this transition will
1801 * be rejected later in the verbs layer checks).
1802 * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1803 * together in the SQD->SQD transition.
1804 *
1805 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1806 * verbs layer driver does not track primary port changes
1807 * resulting from path migration. Thus, in SQD, if the primary
1808 * AV is modified, the primary port should also be modified).
1809 *
1810 * Note that in this transition, the IB_QP_STATE flag
1811 * is not allowed.
1812 */
1813 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1814 == (IB_QP_AV | IB_QP_PORT)) &&
1815 cmd->base.port_num != cmd->base.dest.port_num) {
1816 ret = -EINVAL;
1817 goto release_qp;
1818 }
1819 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1820 == IB_QP_AV) {
1821 cmd->base.attr_mask |= IB_QP_PORT;
1822 cmd->base.port_num = cmd->base.dest.port_num;
1823 }
1824 }
1825 }
1826
1827 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1828 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1829 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1830 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1831 ret = -EINVAL;
1832 goto release_qp;
1833 }
1834
1835 if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1836 cmd->base.cur_qp_state > IB_QPS_ERR) ||
1837 (cmd->base.attr_mask & IB_QP_STATE &&
1838 cmd->base.qp_state > IB_QPS_ERR)) {
1839 ret = -EINVAL;
1840 goto release_qp;
1841 }
1842
1843 if (cmd->base.attr_mask & IB_QP_STATE)
1844 attr->qp_state = cmd->base.qp_state;
1845 if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1846 attr->cur_qp_state = cmd->base.cur_qp_state;
1847 if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1848 attr->path_mtu = cmd->base.path_mtu;
1849 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1850 attr->path_mig_state = cmd->base.path_mig_state;
1851 if (cmd->base.attr_mask & IB_QP_QKEY) {
1852 if (cmd->base.qkey & IB_QP_SET_QKEY &&
1853 !rdma_nl_get_privileged_qkey()) {
1854 ret = -EPERM;
1855 goto release_qp;
1856 }
1857 attr->qkey = cmd->base.qkey;
1858 }
1859 if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1860 attr->rq_psn = cmd->base.rq_psn;
1861 if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1862 attr->sq_psn = cmd->base.sq_psn;
1863 if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1864 attr->dest_qp_num = cmd->base.dest_qp_num;
1865 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1866 attr->qp_access_flags = cmd->base.qp_access_flags;
1867 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1868 attr->pkey_index = cmd->base.pkey_index;
1869 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1870 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1871 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1872 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1873 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1874 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1875 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1876 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1877 if (cmd->base.attr_mask & IB_QP_PORT)
1878 attr->port_num = cmd->base.port_num;
1879 if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1880 attr->timeout = cmd->base.timeout;
1881 if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1882 attr->retry_cnt = cmd->base.retry_cnt;
1883 if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1884 attr->rnr_retry = cmd->base.rnr_retry;
1885 if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1886 attr->alt_port_num = cmd->base.alt_port_num;
1887 attr->alt_timeout = cmd->base.alt_timeout;
1888 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1889 }
1890 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1891 attr->rate_limit = cmd->rate_limit;
1892
1893 if (cmd->base.attr_mask & IB_QP_AV)
1894 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1895 &cmd->base.dest);
1896
1897 if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1898 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1899 &cmd->base.alt_dest);
1900
1901 ret = ib_modify_qp_with_udata(qp, attr,
1902 modify_qp_mask(qp->qp_type,
1903 cmd->base.attr_mask),
1904 &attrs->driver_udata);
1905
1906 release_qp:
1907 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1908 UVERBS_LOOKUP_READ);
1909 out:
1910 kfree(attr);
1911
1912 return ret;
1913 }
1914
1915 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1916 {
1917 struct ib_uverbs_ex_modify_qp cmd;
1918 int ret;
1919
1920 ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1921 if (ret)
1922 return ret;
1923
1924 if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
1925 return -EOPNOTSUPP;
1926
1927 return modify_qp(attrs, &cmd);
1928 }
1929
1930 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1931 {
1932 struct ib_uverbs_ex_modify_qp cmd;
1933 struct ib_uverbs_ex_modify_qp_resp resp = {
1934 .response_length = uverbs_response_length(attrs, sizeof(resp))
1935 };
1936 int ret;
1937
1938 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1939 if (ret)
1940 return ret;
1941
1942 /*
1943 * Last bit is reserved for extending the attr_mask by
1944 * using another field.
1945 */
1946 if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT))
1947 return -EOPNOTSUPP;
1948
1949 ret = modify_qp(attrs, &cmd);
1950 if (ret)
1951 return ret;
1952
1953 return uverbs_response(attrs, &resp, sizeof(resp));
1954 }
1955
1956 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1957 {
1958 struct ib_uverbs_destroy_qp cmd;
1959 struct ib_uverbs_destroy_qp_resp resp;
1960 struct ib_uobject *uobj;
1961 struct ib_uqp_object *obj;
1962 int ret;
1963
1964 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1965 if (ret)
1966 return ret;
1967
1968 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1969 if (IS_ERR(uobj))
1970 return PTR_ERR(uobj);
1971
1972 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1973 memset(&resp, 0, sizeof(resp));
1974 resp.events_reported = obj->uevent.events_reported;
1975
1976 uobj_put_destroy(uobj);
1977
1978 return uverbs_response(attrs, &resp, sizeof(resp));
1979 }
1980
1981 static void *alloc_wr(size_t wr_size, __u32 num_sge)
1982 {
1983 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) /
1984 sizeof(struct ib_sge))
1985 return NULL;
1986
1987 return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) +
1988 num_sge * sizeof(struct ib_sge),
1989 GFP_KERNEL);
1990 }
1991
1992 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
1993 {
1994 struct ib_uverbs_post_send cmd;
1995 struct ib_uverbs_post_send_resp resp;
1996 struct ib_uverbs_send_wr *user_wr;
1997 struct ib_send_wr *wr = NULL, *last, *next;
1998 const struct ib_send_wr *bad_wr;
1999 struct ib_qp *qp;
2000 int i, sg_ind;
2001 int is_ud;
2002 int ret, ret2;
2003 size_t next_size;
2004 const struct ib_sge __user *sgls;
2005 const void __user *wqes;
2006 struct uverbs_req_iter iter;
2007
2008 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2009 if (ret)
2010 return ret;
2011 wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2012 if (IS_ERR(wqes))
2013 return PTR_ERR(wqes);
2014 sgls = uverbs_request_next_ptr(
2015 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2016 if (IS_ERR(sgls))
2017 return PTR_ERR(sgls);
2018 ret = uverbs_request_finish(&iter);
2019 if (ret)
2020 return ret;
2021
2022 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2023 if (!user_wr)
2024 return -ENOMEM;
2025
2026 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2027 if (!qp) {
2028 ret = -EINVAL;
2029 goto out;
2030 }
2031
2032 is_ud = qp->qp_type == IB_QPT_UD;
2033 sg_ind = 0;
2034 last = NULL;
2035 for (i = 0; i < cmd.wr_count; ++i) {
2036 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2037 cmd.wqe_size)) {
2038 ret = -EFAULT;
2039 goto out_put;
2040 }
2041
2042 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2043 ret = -EINVAL;
2044 goto out_put;
2045 }
2046
2047 if (is_ud) {
2048 struct ib_ud_wr *ud;
2049
2050 if (user_wr->opcode != IB_WR_SEND &&
2051 user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2052 ret = -EINVAL;
2053 goto out_put;
2054 }
2055
2056 next_size = sizeof(*ud);
2057 ud = alloc_wr(next_size, user_wr->num_sge);
2058 if (!ud) {
2059 ret = -ENOMEM;
2060 goto out_put;
2061 }
2062
2063 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2064 user_wr->wr.ud.ah, attrs);
2065 if (!ud->ah) {
2066 kfree(ud);
2067 ret = -EINVAL;
2068 goto out_put;
2069 }
2070 ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2071 ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2072
2073 next = &ud->wr;
2074 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2075 user_wr->opcode == IB_WR_RDMA_WRITE ||
2076 user_wr->opcode == IB_WR_RDMA_READ) {
2077 struct ib_rdma_wr *rdma;
2078
2079 next_size = sizeof(*rdma);
2080 rdma = alloc_wr(next_size, user_wr->num_sge);
2081 if (!rdma) {
2082 ret = -ENOMEM;
2083 goto out_put;
2084 }
2085
2086 rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2087 rdma->rkey = user_wr->wr.rdma.rkey;
2088
2089 next = &rdma->wr;
2090 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2091 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2092 struct ib_atomic_wr *atomic;
2093
2094 next_size = sizeof(*atomic);
2095 atomic = alloc_wr(next_size, user_wr->num_sge);
2096 if (!atomic) {
2097 ret = -ENOMEM;
2098 goto out_put;
2099 }
2100
2101 atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2102 atomic->compare_add = user_wr->wr.atomic.compare_add;
2103 atomic->swap = user_wr->wr.atomic.swap;
2104 atomic->rkey = user_wr->wr.atomic.rkey;
2105
2106 next = &atomic->wr;
2107 } else if (user_wr->opcode == IB_WR_SEND ||
2108 user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2109 user_wr->opcode == IB_WR_SEND_WITH_INV) {
2110 next_size = sizeof(*next);
2111 next = alloc_wr(next_size, user_wr->num_sge);
2112 if (!next) {
2113 ret = -ENOMEM;
2114 goto out_put;
2115 }
2116 } else {
2117 ret = -EINVAL;
2118 goto out_put;
2119 }
2120
2121 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2122 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2123 next->ex.imm_data =
2124 (__be32 __force) user_wr->ex.imm_data;
2125 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2126 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2127 }
2128
2129 if (!last)
2130 wr = next;
2131 else
2132 last->next = next;
2133 last = next;
2134
2135 next->next = NULL;
2136 next->wr_id = user_wr->wr_id;
2137 next->num_sge = user_wr->num_sge;
2138 next->opcode = user_wr->opcode;
2139 next->send_flags = user_wr->send_flags;
2140
2141 if (next->num_sge) {
2142 next->sg_list = (void *) next +
2143 ALIGN(next_size, sizeof(struct ib_sge));
2144 if (copy_from_user(next->sg_list, sgls + sg_ind,
2145 next->num_sge *
2146 sizeof(struct ib_sge))) {
2147 ret = -EFAULT;
2148 goto out_put;
2149 }
2150 sg_ind += next->num_sge;
2151 } else
2152 next->sg_list = NULL;
2153 }
2154
2155 resp.bad_wr = 0;
2156 ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2157 if (ret)
2158 for (next = wr; next; next = next->next) {
2159 ++resp.bad_wr;
2160 if (next == bad_wr)
2161 break;
2162 }
2163
2164 ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2165 if (ret2)
2166 ret = ret2;
2167
2168 out_put:
2169 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2170 UVERBS_LOOKUP_READ);
2171
2172 while (wr) {
2173 if (is_ud && ud_wr(wr)->ah)
2174 uobj_put_obj_read(ud_wr(wr)->ah);
2175 next = wr->next;
2176 kfree(wr);
2177 wr = next;
2178 }
2179
2180 out:
2181 kfree(user_wr);
2182
2183 return ret;
2184 }
2185
2186 static struct ib_recv_wr *
2187 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2188 u32 wqe_size, u32 sge_count)
2189 {
2190 struct ib_uverbs_recv_wr *user_wr;
2191 struct ib_recv_wr *wr = NULL, *last, *next;
2192 int sg_ind;
2193 int i;
2194 int ret;
2195 const struct ib_sge __user *sgls;
2196 const void __user *wqes;
2197
2198 if (wqe_size < sizeof(struct ib_uverbs_recv_wr))
2199 return ERR_PTR(-EINVAL);
2200
2201 wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2202 if (IS_ERR(wqes))
2203 return ERR_CAST(wqes);
2204 sgls = uverbs_request_next_ptr(
2205 iter, sge_count * sizeof(struct ib_uverbs_sge));
2206 if (IS_ERR(sgls))
2207 return ERR_CAST(sgls);
2208 ret = uverbs_request_finish(iter);
2209 if (ret)
2210 return ERR_PTR(ret);
2211
2212 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2213 if (!user_wr)
2214 return ERR_PTR(-ENOMEM);
2215
2216 sg_ind = 0;
2217 last = NULL;
2218 for (i = 0; i < wr_count; ++i) {
2219 if (copy_from_user(user_wr, wqes + i * wqe_size,
2220 wqe_size)) {
2221 ret = -EFAULT;
2222 goto err;
2223 }
2224
2225 if (user_wr->num_sge + sg_ind > sge_count) {
2226 ret = -EINVAL;
2227 goto err;
2228 }
2229
2230 if (user_wr->num_sge >=
2231 (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) /
2232 sizeof(struct ib_sge)) {
2233 ret = -EINVAL;
2234 goto err;
2235 }
2236
2237 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) +
2238 user_wr->num_sge * sizeof(struct ib_sge),
2239 GFP_KERNEL);
2240 if (!next) {
2241 ret = -ENOMEM;
2242 goto err;
2243 }
2244
2245 if (!last)
2246 wr = next;
2247 else
2248 last->next = next;
2249 last = next;
2250
2251 next->next = NULL;
2252 next->wr_id = user_wr->wr_id;
2253 next->num_sge = user_wr->num_sge;
2254
2255 if (next->num_sge) {
2256 next->sg_list = (void *)next +
2257 ALIGN(sizeof(*next), sizeof(struct ib_sge));
2258 if (copy_from_user(next->sg_list, sgls + sg_ind,
2259 next->num_sge *
2260 sizeof(struct ib_sge))) {
2261 ret = -EFAULT;
2262 goto err;
2263 }
2264 sg_ind += next->num_sge;
2265 } else
2266 next->sg_list = NULL;
2267 }
2268
2269 kfree(user_wr);
2270 return wr;
2271
2272 err:
2273 kfree(user_wr);
2274
2275 while (wr) {
2276 next = wr->next;
2277 kfree(wr);
2278 wr = next;
2279 }
2280
2281 return ERR_PTR(ret);
2282 }
2283
2284 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2285 {
2286 struct ib_uverbs_post_recv cmd;
2287 struct ib_uverbs_post_recv_resp resp;
2288 struct ib_recv_wr *wr, *next;
2289 const struct ib_recv_wr *bad_wr;
2290 struct ib_qp *qp;
2291 int ret, ret2;
2292 struct uverbs_req_iter iter;
2293
2294 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2295 if (ret)
2296 return ret;
2297
2298 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2299 cmd.sge_count);
2300 if (IS_ERR(wr))
2301 return PTR_ERR(wr);
2302
2303 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2304 if (!qp) {
2305 ret = -EINVAL;
2306 goto out;
2307 }
2308
2309 resp.bad_wr = 0;
2310 ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2311
2312 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2313 UVERBS_LOOKUP_READ);
2314 if (ret) {
2315 for (next = wr; next; next = next->next) {
2316 ++resp.bad_wr;
2317 if (next == bad_wr)
2318 break;
2319 }
2320 }
2321
2322 ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2323 if (ret2)
2324 ret = ret2;
2325 out:
2326 while (wr) {
2327 next = wr->next;
2328 kfree(wr);
2329 wr = next;
2330 }
2331
2332 return ret;
2333 }
2334
2335 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2336 {
2337 struct ib_uverbs_post_srq_recv cmd;
2338 struct ib_uverbs_post_srq_recv_resp resp;
2339 struct ib_recv_wr *wr, *next;
2340 const struct ib_recv_wr *bad_wr;
2341 struct ib_srq *srq;
2342 int ret, ret2;
2343 struct uverbs_req_iter iter;
2344
2345 ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2346 if (ret)
2347 return ret;
2348
2349 wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2350 cmd.sge_count);
2351 if (IS_ERR(wr))
2352 return PTR_ERR(wr);
2353
2354 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2355 if (!srq) {
2356 ret = -EINVAL;
2357 goto out;
2358 }
2359
2360 resp.bad_wr = 0;
2361 ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2362
2363 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
2364 UVERBS_LOOKUP_READ);
2365
2366 if (ret)
2367 for (next = wr; next; next = next->next) {
2368 ++resp.bad_wr;
2369 if (next == bad_wr)
2370 break;
2371 }
2372
2373 ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2374 if (ret2)
2375 ret = ret2;
2376
2377 out:
2378 while (wr) {
2379 next = wr->next;
2380 kfree(wr);
2381 wr = next;
2382 }
2383
2384 return ret;
2385 }
2386
2387 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2388 {
2389 struct ib_uverbs_create_ah cmd;
2390 struct ib_uverbs_create_ah_resp resp;
2391 struct ib_uobject *uobj;
2392 struct ib_pd *pd;
2393 struct ib_ah *ah;
2394 struct rdma_ah_attr attr = {};
2395 int ret;
2396 struct ib_device *ib_dev;
2397
2398 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2399 if (ret)
2400 return ret;
2401
2402 uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2403 if (IS_ERR(uobj))
2404 return PTR_ERR(uobj);
2405
2406 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2407 ret = -EINVAL;
2408 goto err;
2409 }
2410
2411 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2412 if (!pd) {
2413 ret = -EINVAL;
2414 goto err;
2415 }
2416
2417 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2418 rdma_ah_set_make_grd(&attr, false);
2419 rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2420 rdma_ah_set_sl(&attr, cmd.attr.sl);
2421 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2422 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2423 rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2424
2425 if (cmd.attr.is_global) {
2426 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2427 cmd.attr.grh.sgid_index,
2428 cmd.attr.grh.hop_limit,
2429 cmd.attr.grh.traffic_class);
2430 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2431 } else {
2432 rdma_ah_set_ah_flags(&attr, 0);
2433 }
2434
2435 ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2436 if (IS_ERR(ah)) {
2437 ret = PTR_ERR(ah);
2438 goto err_put;
2439 }
2440
2441 ah->uobject = uobj;
2442 uobj->user_handle = cmd.user_handle;
2443 uobj->object = ah;
2444 uobj_put_obj_read(pd);
2445 uobj_finalize_uobj_create(uobj, attrs);
2446
2447 resp.ah_handle = uobj->id;
2448 return uverbs_response(attrs, &resp, sizeof(resp));
2449
2450 err_put:
2451 uobj_put_obj_read(pd);
2452 err:
2453 uobj_alloc_abort(uobj, attrs);
2454 return ret;
2455 }
2456
2457 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2458 {
2459 struct ib_uverbs_destroy_ah cmd;
2460 int ret;
2461
2462 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2463 if (ret)
2464 return ret;
2465
2466 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2467 }
2468
2469 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2470 {
2471 struct ib_uverbs_attach_mcast cmd;
2472 struct ib_qp *qp;
2473 struct ib_uqp_object *obj;
2474 struct ib_uverbs_mcast_entry *mcast;
2475 int ret;
2476
2477 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2478 if (ret)
2479 return ret;
2480
2481 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2482 if (!qp)
2483 return -EINVAL;
2484
2485 obj = qp->uobject;
2486
2487 mutex_lock(&obj->mcast_lock);
2488 list_for_each_entry(mcast, &obj->mcast_list, list)
2489 if (cmd.mlid == mcast->lid &&
2490 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2491 ret = 0;
2492 goto out_put;
2493 }
2494
2495 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2496 if (!mcast) {
2497 ret = -ENOMEM;
2498 goto out_put;
2499 }
2500
2501 mcast->lid = cmd.mlid;
2502 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2503
2504 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2505 if (!ret)
2506 list_add_tail(&mcast->list, &obj->mcast_list);
2507 else
2508 kfree(mcast);
2509
2510 out_put:
2511 mutex_unlock(&obj->mcast_lock);
2512 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2513 UVERBS_LOOKUP_READ);
2514
2515 return ret;
2516 }
2517
2518 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2519 {
2520 struct ib_uverbs_detach_mcast cmd;
2521 struct ib_uqp_object *obj;
2522 struct ib_qp *qp;
2523 struct ib_uverbs_mcast_entry *mcast;
2524 int ret;
2525 bool found = false;
2526
2527 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2528 if (ret)
2529 return ret;
2530
2531 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2532 if (!qp)
2533 return -EINVAL;
2534
2535 obj = qp->uobject;
2536 mutex_lock(&obj->mcast_lock);
2537
2538 list_for_each_entry(mcast, &obj->mcast_list, list)
2539 if (cmd.mlid == mcast->lid &&
2540 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2541 list_del(&mcast->list);
2542 kfree(mcast);
2543 found = true;
2544 break;
2545 }
2546
2547 if (!found) {
2548 ret = -EINVAL;
2549 goto out_put;
2550 }
2551
2552 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2553
2554 out_put:
2555 mutex_unlock(&obj->mcast_lock);
2556 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2557 UVERBS_LOOKUP_READ);
2558 return ret;
2559 }
2560
2561 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2562 {
2563 struct ib_uflow_resources *resources;
2564
2565 resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2566
2567 if (!resources)
2568 return NULL;
2569
2570 if (!num_specs)
2571 goto out;
2572
2573 resources->counters =
2574 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2575 resources->collection =
2576 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2577
2578 if (!resources->counters || !resources->collection)
2579 goto err;
2580
2581 out:
2582 resources->max = num_specs;
2583 return resources;
2584
2585 err:
2586 kfree(resources->counters);
2587 kfree(resources);
2588
2589 return NULL;
2590 }
2591 EXPORT_SYMBOL(flow_resources_alloc);
2592
2593 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2594 {
2595 unsigned int i;
2596
2597 if (!uflow_res)
2598 return;
2599
2600 for (i = 0; i < uflow_res->collection_num; i++)
2601 atomic_dec(&uflow_res->collection[i]->usecnt);
2602
2603 for (i = 0; i < uflow_res->counters_num; i++)
2604 atomic_dec(&uflow_res->counters[i]->usecnt);
2605
2606 kfree(uflow_res->collection);
2607 kfree(uflow_res->counters);
2608 kfree(uflow_res);
2609 }
2610 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2611
2612 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2613 enum ib_flow_spec_type type,
2614 void *ibobj)
2615 {
2616 WARN_ON(uflow_res->num >= uflow_res->max);
2617
2618 switch (type) {
2619 case IB_FLOW_SPEC_ACTION_HANDLE:
2620 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2621 uflow_res->collection[uflow_res->collection_num++] =
2622 (struct ib_flow_action *)ibobj;
2623 break;
2624 case IB_FLOW_SPEC_ACTION_COUNT:
2625 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2626 uflow_res->counters[uflow_res->counters_num++] =
2627 (struct ib_counters *)ibobj;
2628 break;
2629 default:
2630 WARN_ON(1);
2631 }
2632
2633 uflow_res->num++;
2634 }
2635 EXPORT_SYMBOL(flow_resources_add);
2636
2637 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs,
2638 struct ib_uverbs_flow_spec *kern_spec,
2639 union ib_flow_spec *ib_spec,
2640 struct ib_uflow_resources *uflow_res)
2641 {
2642 ib_spec->type = kern_spec->type;
2643 switch (ib_spec->type) {
2644 case IB_FLOW_SPEC_ACTION_TAG:
2645 if (kern_spec->flow_tag.size !=
2646 sizeof(struct ib_uverbs_flow_spec_action_tag))
2647 return -EINVAL;
2648
2649 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2650 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2651 break;
2652 case IB_FLOW_SPEC_ACTION_DROP:
2653 if (kern_spec->drop.size !=
2654 sizeof(struct ib_uverbs_flow_spec_action_drop))
2655 return -EINVAL;
2656
2657 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2658 break;
2659 case IB_FLOW_SPEC_ACTION_HANDLE:
2660 if (kern_spec->action.size !=
2661 sizeof(struct ib_uverbs_flow_spec_action_handle))
2662 return -EOPNOTSUPP;
2663 ib_spec->action.act = uobj_get_obj_read(flow_action,
2664 UVERBS_OBJECT_FLOW_ACTION,
2665 kern_spec->action.handle,
2666 attrs);
2667 if (!ib_spec->action.act)
2668 return -EINVAL;
2669 ib_spec->action.size =
2670 sizeof(struct ib_flow_spec_action_handle);
2671 flow_resources_add(uflow_res,
2672 IB_FLOW_SPEC_ACTION_HANDLE,
2673 ib_spec->action.act);
2674 uobj_put_obj_read(ib_spec->action.act);
2675 break;
2676 case IB_FLOW_SPEC_ACTION_COUNT:
2677 if (kern_spec->flow_count.size !=
2678 sizeof(struct ib_uverbs_flow_spec_action_count))
2679 return -EINVAL;
2680 ib_spec->flow_count.counters =
2681 uobj_get_obj_read(counters,
2682 UVERBS_OBJECT_COUNTERS,
2683 kern_spec->flow_count.handle,
2684 attrs);
2685 if (!ib_spec->flow_count.counters)
2686 return -EINVAL;
2687 ib_spec->flow_count.size =
2688 sizeof(struct ib_flow_spec_action_count);
2689 flow_resources_add(uflow_res,
2690 IB_FLOW_SPEC_ACTION_COUNT,
2691 ib_spec->flow_count.counters);
2692 uobj_put_obj_read(ib_spec->flow_count.counters);
2693 break;
2694 default:
2695 return -EINVAL;
2696 }
2697 return 0;
2698 }
2699
2700 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2701 u16 ib_real_filter_sz)
2702 {
2703 /*
2704 * User space filter structures must be 64 bit aligned, otherwise this
2705 * may pass, but we won't handle additional new attributes.
2706 */
2707
2708 if (kern_filter_size > ib_real_filter_sz) {
2709 if (memchr_inv(kern_spec_filter +
2710 ib_real_filter_sz, 0,
2711 kern_filter_size - ib_real_filter_sz))
2712 return -EINVAL;
2713 return ib_real_filter_sz;
2714 }
2715 return kern_filter_size;
2716 }
2717
2718 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2719 const void *kern_spec_mask,
2720 const void *kern_spec_val,
2721 size_t kern_filter_sz,
2722 union ib_flow_spec *ib_spec)
2723 {
2724 ssize_t actual_filter_sz;
2725 ssize_t ib_filter_sz;
2726
2727 /* User flow spec size must be aligned to 4 bytes */
2728 if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2729 return -EINVAL;
2730
2731 ib_spec->type = type;
2732
2733 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2734 return -EINVAL;
2735
2736 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2737 case IB_FLOW_SPEC_ETH:
2738 ib_filter_sz = sizeof(struct ib_flow_eth_filter);
2739 actual_filter_sz = spec_filter_size(kern_spec_mask,
2740 kern_filter_sz,
2741 ib_filter_sz);
2742 if (actual_filter_sz <= 0)
2743 return -EINVAL;
2744 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2745 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2746 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2747 break;
2748 case IB_FLOW_SPEC_IPV4:
2749 ib_filter_sz = sizeof(struct ib_flow_ipv4_filter);
2750 actual_filter_sz = spec_filter_size(kern_spec_mask,
2751 kern_filter_sz,
2752 ib_filter_sz);
2753 if (actual_filter_sz <= 0)
2754 return -EINVAL;
2755 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2756 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2757 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2758 break;
2759 case IB_FLOW_SPEC_IPV6:
2760 ib_filter_sz = sizeof(struct ib_flow_ipv6_filter);
2761 actual_filter_sz = spec_filter_size(kern_spec_mask,
2762 kern_filter_sz,
2763 ib_filter_sz);
2764 if (actual_filter_sz <= 0)
2765 return -EINVAL;
2766 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2767 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2768 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2769
2770 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2771 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2772 return -EINVAL;
2773 break;
2774 case IB_FLOW_SPEC_TCP:
2775 case IB_FLOW_SPEC_UDP:
2776 ib_filter_sz = sizeof(struct ib_flow_tcp_udp_filter);
2777 actual_filter_sz = spec_filter_size(kern_spec_mask,
2778 kern_filter_sz,
2779 ib_filter_sz);
2780 if (actual_filter_sz <= 0)
2781 return -EINVAL;
2782 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2783 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2784 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2785 break;
2786 case IB_FLOW_SPEC_VXLAN_TUNNEL:
2787 ib_filter_sz = sizeof(struct ib_flow_tunnel_filter);
2788 actual_filter_sz = spec_filter_size(kern_spec_mask,
2789 kern_filter_sz,
2790 ib_filter_sz);
2791 if (actual_filter_sz <= 0)
2792 return -EINVAL;
2793 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2794 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2795 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2796
2797 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2798 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2799 return -EINVAL;
2800 break;
2801 case IB_FLOW_SPEC_ESP:
2802 ib_filter_sz = sizeof(struct ib_flow_esp_filter);
2803 actual_filter_sz = spec_filter_size(kern_spec_mask,
2804 kern_filter_sz,
2805 ib_filter_sz);
2806 if (actual_filter_sz <= 0)
2807 return -EINVAL;
2808 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2809 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2810 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2811 break;
2812 case IB_FLOW_SPEC_GRE:
2813 ib_filter_sz = sizeof(struct ib_flow_gre_filter);
2814 actual_filter_sz = spec_filter_size(kern_spec_mask,
2815 kern_filter_sz,
2816 ib_filter_sz);
2817 if (actual_filter_sz <= 0)
2818 return -EINVAL;
2819 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2820 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2821 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2822 break;
2823 case IB_FLOW_SPEC_MPLS:
2824 ib_filter_sz = sizeof(struct ib_flow_mpls_filter);
2825 actual_filter_sz = spec_filter_size(kern_spec_mask,
2826 kern_filter_sz,
2827 ib_filter_sz);
2828 if (actual_filter_sz <= 0)
2829 return -EINVAL;
2830 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2831 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2832 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2833 break;
2834 default:
2835 return -EINVAL;
2836 }
2837 return 0;
2838 }
2839
2840 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2841 union ib_flow_spec *ib_spec)
2842 {
2843 size_t kern_filter_sz;
2844 void *kern_spec_mask;
2845 void *kern_spec_val;
2846
2847 if (check_sub_overflow((size_t)kern_spec->hdr.size,
2848 sizeof(struct ib_uverbs_flow_spec_hdr),
2849 &kern_filter_sz))
2850 return -EINVAL;
2851
2852 kern_filter_sz /= 2;
2853
2854 kern_spec_val = (void *)kern_spec +
2855 sizeof(struct ib_uverbs_flow_spec_hdr);
2856 kern_spec_mask = kern_spec_val + kern_filter_sz;
2857
2858 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2859 kern_spec_mask,
2860 kern_spec_val,
2861 kern_filter_sz, ib_spec);
2862 }
2863
2864 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2865 struct ib_uverbs_flow_spec *kern_spec,
2866 union ib_flow_spec *ib_spec,
2867 struct ib_uflow_resources *uflow_res)
2868 {
2869 if (kern_spec->reserved)
2870 return -EINVAL;
2871
2872 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2873 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2874 uflow_res);
2875 else
2876 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2877 }
2878
2879 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2880 {
2881 struct ib_uverbs_ex_create_wq cmd;
2882 struct ib_uverbs_ex_create_wq_resp resp = {};
2883 struct ib_uwq_object *obj;
2884 int err = 0;
2885 struct ib_cq *cq;
2886 struct ib_pd *pd;
2887 struct ib_wq *wq;
2888 struct ib_wq_init_attr wq_init_attr = {};
2889 struct ib_device *ib_dev;
2890
2891 err = uverbs_request(attrs, &cmd, sizeof(cmd));
2892 if (err)
2893 return err;
2894
2895 if (cmd.comp_mask)
2896 return -EOPNOTSUPP;
2897
2898 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2899 &ib_dev);
2900 if (IS_ERR(obj))
2901 return PTR_ERR(obj);
2902
2903 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2904 if (!pd) {
2905 err = -EINVAL;
2906 goto err_uobj;
2907 }
2908
2909 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2910 if (!cq) {
2911 err = -EINVAL;
2912 goto err_put_pd;
2913 }
2914
2915 wq_init_attr.cq = cq;
2916 wq_init_attr.max_sge = cmd.max_sge;
2917 wq_init_attr.max_wr = cmd.max_wr;
2918 wq_init_attr.wq_type = cmd.wq_type;
2919 wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2920 wq_init_attr.create_flags = cmd.create_flags;
2921 INIT_LIST_HEAD(&obj->uevent.event_list);
2922 obj->uevent.uobject.user_handle = cmd.user_handle;
2923
2924 wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2925 if (IS_ERR(wq)) {
2926 err = PTR_ERR(wq);
2927 goto err_put_cq;
2928 }
2929
2930 wq->uobject = obj;
2931 obj->uevent.uobject.object = wq;
2932 wq->wq_type = wq_init_attr.wq_type;
2933 wq->cq = cq;
2934 wq->pd = pd;
2935 wq->device = pd->device;
2936 atomic_set(&wq->usecnt, 0);
2937 atomic_inc(&pd->usecnt);
2938 atomic_inc(&cq->usecnt);
2939 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
2940 if (obj->uevent.event_file)
2941 uverbs_uobject_get(&obj->uevent.event_file->uobj);
2942
2943 uobj_put_obj_read(pd);
2944 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2945 UVERBS_LOOKUP_READ);
2946 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
2947
2948 resp.wq_handle = obj->uevent.uobject.id;
2949 resp.max_sge = wq_init_attr.max_sge;
2950 resp.max_wr = wq_init_attr.max_wr;
2951 resp.wqn = wq->wq_num;
2952 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2953 return uverbs_response(attrs, &resp, sizeof(resp));
2954
2955 err_put_cq:
2956 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2957 UVERBS_LOOKUP_READ);
2958 err_put_pd:
2959 uobj_put_obj_read(pd);
2960 err_uobj:
2961 uobj_alloc_abort(&obj->uevent.uobject, attrs);
2962
2963 return err;
2964 }
2965
2966 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
2967 {
2968 struct ib_uverbs_ex_destroy_wq cmd;
2969 struct ib_uverbs_ex_destroy_wq_resp resp = {};
2970 struct ib_uobject *uobj;
2971 struct ib_uwq_object *obj;
2972 int ret;
2973
2974 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2975 if (ret)
2976 return ret;
2977
2978 if (cmd.comp_mask)
2979 return -EOPNOTSUPP;
2980
2981 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2982 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
2983 if (IS_ERR(uobj))
2984 return PTR_ERR(uobj);
2985
2986 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
2987 resp.events_reported = obj->uevent.events_reported;
2988
2989 uobj_put_destroy(uobj);
2990
2991 return uverbs_response(attrs, &resp, sizeof(resp));
2992 }
2993
2994 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
2995 {
2996 struct ib_uverbs_ex_modify_wq cmd;
2997 struct ib_wq *wq;
2998 struct ib_wq_attr wq_attr = {};
2999 int ret;
3000
3001 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3002 if (ret)
3003 return ret;
3004
3005 if (!cmd.attr_mask)
3006 return -EINVAL;
3007
3008 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3009 return -EINVAL;
3010
3011 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3012 if (!wq)
3013 return -EINVAL;
3014
3015 if (cmd.attr_mask & IB_WQ_FLAGS) {
3016 wq_attr.flags = cmd.flags;
3017 wq_attr.flags_mask = cmd.flags_mask;
3018 }
3019
3020 if (cmd.attr_mask & IB_WQ_CUR_STATE) {
3021 if (cmd.curr_wq_state > IB_WQS_ERR)
3022 return -EINVAL;
3023
3024 wq_attr.curr_wq_state = cmd.curr_wq_state;
3025 } else {
3026 wq_attr.curr_wq_state = wq->state;
3027 }
3028
3029 if (cmd.attr_mask & IB_WQ_STATE) {
3030 if (cmd.wq_state > IB_WQS_ERR)
3031 return -EINVAL;
3032
3033 wq_attr.wq_state = cmd.wq_state;
3034 } else {
3035 wq_attr.wq_state = wq_attr.curr_wq_state;
3036 }
3037
3038 ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3039 &attrs->driver_udata);
3040 rdma_lookup_put_uobject(&wq->uobject->uevent.uobject,
3041 UVERBS_LOOKUP_READ);
3042 return ret;
3043 }
3044
3045 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3046 {
3047 struct ib_uverbs_ex_create_rwq_ind_table cmd;
3048 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {};
3049 struct ib_uobject *uobj;
3050 int err;
3051 struct ib_rwq_ind_table_init_attr init_attr = {};
3052 struct ib_rwq_ind_table *rwq_ind_tbl;
3053 struct ib_wq **wqs = NULL;
3054 u32 *wqs_handles = NULL;
3055 struct ib_wq *wq = NULL;
3056 int i, num_read_wqs;
3057 u32 num_wq_handles;
3058 struct uverbs_req_iter iter;
3059 struct ib_device *ib_dev;
3060
3061 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3062 if (err)
3063 return err;
3064
3065 if (cmd.comp_mask)
3066 return -EOPNOTSUPP;
3067
3068 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3069 return -EINVAL;
3070
3071 num_wq_handles = 1 << cmd.log_ind_tbl_size;
3072 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3073 GFP_KERNEL);
3074 if (!wqs_handles)
3075 return -ENOMEM;
3076
3077 err = uverbs_request_next(&iter, wqs_handles,
3078 num_wq_handles * sizeof(__u32));
3079 if (err)
3080 goto err_free;
3081
3082 err = uverbs_request_finish(&iter);
3083 if (err)
3084 goto err_free;
3085
3086 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3087 if (!wqs) {
3088 err = -ENOMEM;
3089 goto err_free;
3090 }
3091
3092 for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3093 num_read_wqs++) {
3094 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3095 wqs_handles[num_read_wqs], attrs);
3096 if (!wq) {
3097 err = -EINVAL;
3098 goto put_wqs;
3099 }
3100
3101 wqs[num_read_wqs] = wq;
3102 atomic_inc(&wqs[num_read_wqs]->usecnt);
3103 }
3104
3105 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3106 if (IS_ERR(uobj)) {
3107 err = PTR_ERR(uobj);
3108 goto put_wqs;
3109 }
3110
3111 rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table);
3112 if (!rwq_ind_tbl) {
3113 err = -ENOMEM;
3114 goto err_uobj;
3115 }
3116
3117 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3118 init_attr.ind_tbl = wqs;
3119
3120 rwq_ind_tbl->ind_tbl = wqs;
3121 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3122 rwq_ind_tbl->uobject = uobj;
3123 uobj->object = rwq_ind_tbl;
3124 rwq_ind_tbl->device = ib_dev;
3125 atomic_set(&rwq_ind_tbl->usecnt, 0);
3126
3127 err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr,
3128 &attrs->driver_udata);
3129 if (err)
3130 goto err_create;
3131
3132 for (i = 0; i < num_wq_handles; i++)
3133 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3134 UVERBS_LOOKUP_READ);
3135 kfree(wqs_handles);
3136 uobj_finalize_uobj_create(uobj, attrs);
3137
3138 resp.ind_tbl_handle = uobj->id;
3139 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3140 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3141 return uverbs_response(attrs, &resp, sizeof(resp));
3142
3143 err_create:
3144 kfree(rwq_ind_tbl);
3145 err_uobj:
3146 uobj_alloc_abort(uobj, attrs);
3147 put_wqs:
3148 for (i = 0; i < num_read_wqs; i++) {
3149 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3150 UVERBS_LOOKUP_READ);
3151 atomic_dec(&wqs[i]->usecnt);
3152 }
3153 err_free:
3154 kfree(wqs_handles);
3155 kfree(wqs);
3156 return err;
3157 }
3158
3159 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3160 {
3161 struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3162 int ret;
3163
3164 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3165 if (ret)
3166 return ret;
3167
3168 if (cmd.comp_mask)
3169 return -EOPNOTSUPP;
3170
3171 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3172 cmd.ind_tbl_handle, attrs);
3173 }
3174
3175 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3176 {
3177 struct ib_uverbs_create_flow cmd;
3178 struct ib_uverbs_create_flow_resp resp = {};
3179 struct ib_uobject *uobj;
3180 struct ib_flow *flow_id;
3181 struct ib_uverbs_flow_attr *kern_flow_attr;
3182 struct ib_flow_attr *flow_attr;
3183 struct ib_qp *qp;
3184 struct ib_uflow_resources *uflow_res;
3185 struct ib_uverbs_flow_spec_hdr *kern_spec;
3186 struct uverbs_req_iter iter;
3187 int err;
3188 void *ib_spec;
3189 int i;
3190 struct ib_device *ib_dev;
3191
3192 err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3193 if (err)
3194 return err;
3195
3196 if (cmd.comp_mask)
3197 return -EINVAL;
3198
3199 if (!capable(CAP_NET_RAW))
3200 return -EPERM;
3201
3202 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3203 return -EINVAL;
3204
3205 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3206 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3207 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3208 return -EINVAL;
3209
3210 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3211 return -EINVAL;
3212
3213 if (cmd.flow_attr.size >
3214 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3215 return -EINVAL;
3216
3217 if (cmd.flow_attr.reserved[0] ||
3218 cmd.flow_attr.reserved[1])
3219 return -EINVAL;
3220
3221 if (cmd.flow_attr.num_of_specs) {
3222 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3223 GFP_KERNEL);
3224 if (!kern_flow_attr)
3225 return -ENOMEM;
3226
3227 *kern_flow_attr = cmd.flow_attr;
3228 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3229 cmd.flow_attr.size);
3230 if (err)
3231 goto err_free_attr;
3232 } else {
3233 kern_flow_attr = &cmd.flow_attr;
3234 }
3235
3236 err = uverbs_request_finish(&iter);
3237 if (err)
3238 goto err_free_attr;
3239
3240 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3241 if (IS_ERR(uobj)) {
3242 err = PTR_ERR(uobj);
3243 goto err_free_attr;
3244 }
3245
3246 if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) {
3247 err = -EINVAL;
3248 goto err_uobj;
3249 }
3250
3251 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3252 if (!qp) {
3253 err = -EINVAL;
3254 goto err_uobj;
3255 }
3256
3257 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3258 err = -EINVAL;
3259 goto err_put;
3260 }
3261
3262 flow_attr = kzalloc(struct_size(flow_attr, flows,
3263 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3264 if (!flow_attr) {
3265 err = -ENOMEM;
3266 goto err_put;
3267 }
3268 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3269 if (!uflow_res) {
3270 err = -ENOMEM;
3271 goto err_free_flow_attr;
3272 }
3273
3274 flow_attr->type = kern_flow_attr->type;
3275 flow_attr->priority = kern_flow_attr->priority;
3276 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3277 flow_attr->port = kern_flow_attr->port;
3278 flow_attr->flags = kern_flow_attr->flags;
3279 flow_attr->size = sizeof(*flow_attr);
3280
3281 kern_spec = kern_flow_attr->flow_specs;
3282 ib_spec = flow_attr + 1;
3283 for (i = 0; i < flow_attr->num_of_specs &&
3284 cmd.flow_attr.size >= sizeof(*kern_spec) &&
3285 cmd.flow_attr.size >= kern_spec->size;
3286 i++) {
3287 err = kern_spec_to_ib_spec(
3288 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3289 ib_spec, uflow_res);
3290 if (err)
3291 goto err_free;
3292
3293 flow_attr->size +=
3294 ((union ib_flow_spec *) ib_spec)->size;
3295 cmd.flow_attr.size -= kern_spec->size;
3296 kern_spec = ((void *)kern_spec) + kern_spec->size;
3297 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3298 }
3299 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3300 pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n",
3301 i, cmd.flow_attr.size);
3302 err = -EINVAL;
3303 goto err_free;
3304 }
3305
3306 flow_id = qp->device->ops.create_flow(qp, flow_attr,
3307 &attrs->driver_udata);
3308
3309 if (IS_ERR(flow_id)) {
3310 err = PTR_ERR(flow_id);
3311 goto err_free;
3312 }
3313
3314 ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3315
3316 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3317 UVERBS_LOOKUP_READ);
3318 kfree(flow_attr);
3319
3320 if (cmd.flow_attr.num_of_specs)
3321 kfree(kern_flow_attr);
3322 uobj_finalize_uobj_create(uobj, attrs);
3323
3324 resp.flow_handle = uobj->id;
3325 return uverbs_response(attrs, &resp, sizeof(resp));
3326
3327 err_free:
3328 ib_uverbs_flow_resources_free(uflow_res);
3329 err_free_flow_attr:
3330 kfree(flow_attr);
3331 err_put:
3332 rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3333 UVERBS_LOOKUP_READ);
3334 err_uobj:
3335 uobj_alloc_abort(uobj, attrs);
3336 err_free_attr:
3337 if (cmd.flow_attr.num_of_specs)
3338 kfree(kern_flow_attr);
3339 return err;
3340 }
3341
3342 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3343 {
3344 struct ib_uverbs_destroy_flow cmd;
3345 int ret;
3346
3347 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3348 if (ret)
3349 return ret;
3350
3351 if (cmd.comp_mask)
3352 return -EINVAL;
3353
3354 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3355 }
3356
3357 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3358 struct ib_uverbs_create_xsrq *cmd,
3359 struct ib_udata *udata)
3360 {
3361 struct ib_uverbs_create_srq_resp resp = {};
3362 struct ib_usrq_object *obj;
3363 struct ib_pd *pd;
3364 struct ib_srq *srq;
3365 struct ib_srq_init_attr attr;
3366 int ret;
3367 struct ib_uobject *xrcd_uobj;
3368 struct ib_device *ib_dev;
3369
3370 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3371 &ib_dev);
3372 if (IS_ERR(obj))
3373 return PTR_ERR(obj);
3374
3375 if (cmd->srq_type == IB_SRQT_TM)
3376 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3377
3378 if (cmd->srq_type == IB_SRQT_XRC) {
3379 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3380 attrs);
3381 if (IS_ERR(xrcd_uobj)) {
3382 ret = -EINVAL;
3383 goto err;
3384 }
3385
3386 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3387 if (!attr.ext.xrc.xrcd) {
3388 ret = -EINVAL;
3389 goto err_put_xrcd;
3390 }
3391
3392 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3393 atomic_inc(&obj->uxrcd->refcnt);
3394 }
3395
3396 if (ib_srq_has_cq(cmd->srq_type)) {
3397 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3398 cmd->cq_handle, attrs);
3399 if (!attr.ext.cq) {
3400 ret = -EINVAL;
3401 goto err_put_xrcd;
3402 }
3403 }
3404
3405 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3406 if (!pd) {
3407 ret = -EINVAL;
3408 goto err_put_cq;
3409 }
3410
3411 attr.event_handler = ib_uverbs_srq_event_handler;
3412 attr.srq_type = cmd->srq_type;
3413 attr.attr.max_wr = cmd->max_wr;
3414 attr.attr.max_sge = cmd->max_sge;
3415 attr.attr.srq_limit = cmd->srq_limit;
3416
3417 INIT_LIST_HEAD(&obj->uevent.event_list);
3418 obj->uevent.uobject.user_handle = cmd->user_handle;
3419
3420 srq = ib_create_srq_user(pd, &attr, obj, udata);
3421 if (IS_ERR(srq)) {
3422 ret = PTR_ERR(srq);
3423 goto err_put_pd;
3424 }
3425
3426 obj->uevent.uobject.object = srq;
3427 obj->uevent.uobject.user_handle = cmd->user_handle;
3428 obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
3429 if (obj->uevent.event_file)
3430 uverbs_uobject_get(&obj->uevent.event_file->uobj);
3431
3432 if (cmd->srq_type == IB_SRQT_XRC)
3433 resp.srqn = srq->ext.xrc.srq_num;
3434
3435 if (cmd->srq_type == IB_SRQT_XRC)
3436 uobj_put_read(xrcd_uobj);
3437
3438 if (ib_srq_has_cq(cmd->srq_type))
3439 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3440 UVERBS_LOOKUP_READ);
3441
3442 uobj_put_obj_read(pd);
3443 uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
3444
3445 resp.srq_handle = obj->uevent.uobject.id;
3446 resp.max_wr = attr.attr.max_wr;
3447 resp.max_sge = attr.attr.max_sge;
3448 return uverbs_response(attrs, &resp, sizeof(resp));
3449
3450 err_put_pd:
3451 uobj_put_obj_read(pd);
3452 err_put_cq:
3453 if (ib_srq_has_cq(cmd->srq_type))
3454 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3455 UVERBS_LOOKUP_READ);
3456
3457 err_put_xrcd:
3458 if (cmd->srq_type == IB_SRQT_XRC) {
3459 atomic_dec(&obj->uxrcd->refcnt);
3460 uobj_put_read(xrcd_uobj);
3461 }
3462
3463 err:
3464 uobj_alloc_abort(&obj->uevent.uobject, attrs);
3465 return ret;
3466 }
3467
3468 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3469 {
3470 struct ib_uverbs_create_srq cmd;
3471 struct ib_uverbs_create_xsrq xcmd;
3472 int ret;
3473
3474 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3475 if (ret)
3476 return ret;
3477
3478 memset(&xcmd, 0, sizeof(xcmd));
3479 xcmd.response = cmd.response;
3480 xcmd.user_handle = cmd.user_handle;
3481 xcmd.srq_type = IB_SRQT_BASIC;
3482 xcmd.pd_handle = cmd.pd_handle;
3483 xcmd.max_wr = cmd.max_wr;
3484 xcmd.max_sge = cmd.max_sge;
3485 xcmd.srq_limit = cmd.srq_limit;
3486
3487 return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3488 }
3489
3490 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3491 {
3492 struct ib_uverbs_create_xsrq cmd;
3493 int ret;
3494
3495 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3496 if (ret)
3497 return ret;
3498
3499 return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3500 }
3501
3502 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3503 {
3504 struct ib_uverbs_modify_srq cmd;
3505 struct ib_srq *srq;
3506 struct ib_srq_attr attr;
3507 int ret;
3508
3509 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3510 if (ret)
3511 return ret;
3512
3513 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3514 if (!srq)
3515 return -EINVAL;
3516
3517 attr.max_wr = cmd.max_wr;
3518 attr.srq_limit = cmd.srq_limit;
3519
3520 ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3521 &attrs->driver_udata);
3522
3523 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3524 UVERBS_LOOKUP_READ);
3525
3526 return ret;
3527 }
3528
3529 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3530 {
3531 struct ib_uverbs_query_srq cmd;
3532 struct ib_uverbs_query_srq_resp resp;
3533 struct ib_srq_attr attr;
3534 struct ib_srq *srq;
3535 int ret;
3536
3537 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3538 if (ret)
3539 return ret;
3540
3541 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3542 if (!srq)
3543 return -EINVAL;
3544
3545 ret = ib_query_srq(srq, &attr);
3546
3547 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3548 UVERBS_LOOKUP_READ);
3549
3550 if (ret)
3551 return ret;
3552
3553 memset(&resp, 0, sizeof resp);
3554
3555 resp.max_wr = attr.max_wr;
3556 resp.max_sge = attr.max_sge;
3557 resp.srq_limit = attr.srq_limit;
3558
3559 return uverbs_response(attrs, &resp, sizeof(resp));
3560 }
3561
3562 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3563 {
3564 struct ib_uverbs_destroy_srq cmd;
3565 struct ib_uverbs_destroy_srq_resp resp;
3566 struct ib_uobject *uobj;
3567 struct ib_uevent_object *obj;
3568 int ret;
3569
3570 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3571 if (ret)
3572 return ret;
3573
3574 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3575 if (IS_ERR(uobj))
3576 return PTR_ERR(uobj);
3577
3578 obj = container_of(uobj, struct ib_uevent_object, uobject);
3579 memset(&resp, 0, sizeof(resp));
3580 resp.events_reported = obj->events_reported;
3581
3582 uobj_put_destroy(uobj);
3583
3584 return uverbs_response(attrs, &resp, sizeof(resp));
3585 }
3586
3587 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3588 {
3589 struct ib_uverbs_ex_query_device_resp resp = {};
3590 struct ib_uverbs_ex_query_device cmd;
3591 struct ib_device_attr attr = {0};
3592 struct ib_ucontext *ucontext;
3593 struct ib_device *ib_dev;
3594 int err;
3595
3596 ucontext = ib_uverbs_get_ucontext(attrs);
3597 if (IS_ERR(ucontext))
3598 return PTR_ERR(ucontext);
3599 ib_dev = ucontext->device;
3600
3601 err = uverbs_request(attrs, &cmd, sizeof(cmd));
3602 if (err)
3603 return err;
3604
3605 if (cmd.comp_mask)
3606 return -EINVAL;
3607
3608 if (cmd.reserved)
3609 return -EINVAL;
3610
3611 err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3612 if (err)
3613 return err;
3614
3615 copy_query_dev_fields(ucontext, &resp.base, &attr);
3616
3617 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3618 resp.odp_caps.per_transport_caps.rc_odp_caps =
3619 attr.odp_caps.per_transport_caps.rc_odp_caps;
3620 resp.odp_caps.per_transport_caps.uc_odp_caps =
3621 attr.odp_caps.per_transport_caps.uc_odp_caps;
3622 resp.odp_caps.per_transport_caps.ud_odp_caps =
3623 attr.odp_caps.per_transport_caps.ud_odp_caps;
3624 resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps;
3625
3626 resp.timestamp_mask = attr.timestamp_mask;
3627 resp.hca_core_clock = attr.hca_core_clock;
3628 resp.device_cap_flags_ex = attr.device_cap_flags;
3629 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3630 resp.rss_caps.max_rwq_indirection_tables =
3631 attr.rss_caps.max_rwq_indirection_tables;
3632 resp.rss_caps.max_rwq_indirection_table_size =
3633 attr.rss_caps.max_rwq_indirection_table_size;
3634 resp.max_wq_type_rq = attr.max_wq_type_rq;
3635 resp.raw_packet_caps = attr.raw_packet_caps;
3636 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size;
3637 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags;
3638 resp.tm_caps.max_ops = attr.tm_caps.max_ops;
3639 resp.tm_caps.max_sge = attr.tm_caps.max_sge;
3640 resp.tm_caps.flags = attr.tm_caps.flags;
3641 resp.cq_moderation_caps.max_cq_moderation_count =
3642 attr.cq_caps.max_cq_moderation_count;
3643 resp.cq_moderation_caps.max_cq_moderation_period =
3644 attr.cq_caps.max_cq_moderation_period;
3645 resp.max_dm_size = attr.max_dm_size;
3646 resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3647
3648 return uverbs_response(attrs, &resp, sizeof(resp));
3649 }
3650
3651 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3652 {
3653 struct ib_uverbs_ex_modify_cq cmd;
3654 struct ib_cq *cq;
3655 int ret;
3656
3657 ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3658 if (ret)
3659 return ret;
3660
3661 if (!cmd.attr_mask || cmd.reserved)
3662 return -EINVAL;
3663
3664 if (cmd.attr_mask > IB_CQ_MODERATE)
3665 return -EOPNOTSUPP;
3666
3667 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3668 if (!cq)
3669 return -EINVAL;
3670
3671 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3672
3673 rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3674 UVERBS_LOOKUP_READ);
3675 return ret;
3676 }
3677
3678 /*
3679 * Describe the input structs for write(). Some write methods have an input
3680 * only struct, most have an input and output. If the struct has an output then
3681 * the 'response' u64 must be the first field in the request structure.
3682 *
3683 * If udata is present then both the request and response structs have a
3684 * trailing driver_data flex array. In this case the size of the base struct
3685 * cannot be changed.
3686 */
3687 #define UAPI_DEF_WRITE_IO(req, resp) \
3688 .write.has_resp = 1 + \
3689 BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) + \
3690 BUILD_BUG_ON_ZERO(sizeof_field(req, response) != \
3691 sizeof(u64)), \
3692 .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3693
3694 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3695
3696 #define UAPI_DEF_WRITE_UDATA_IO(req, resp) \
3697 UAPI_DEF_WRITE_IO(req, resp), \
3698 .write.has_udata = \
3699 1 + \
3700 BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \
3701 sizeof(req)) + \
3702 BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) != \
3703 sizeof(resp))
3704
3705 #define UAPI_DEF_WRITE_UDATA_I(req) \
3706 UAPI_DEF_WRITE_I(req), \
3707 .write.has_udata = \
3708 1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) != \
3709 sizeof(req))
3710
3711 /*
3712 * The _EX versions are for use with WRITE_EX and allow the last struct member
3713 * to be specified. Buffers that do not include that member will be rejected.
3714 */
3715 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member) \
3716 .write.has_resp = 1, \
3717 .write.req_size = offsetofend(req, req_last_member), \
3718 .write.resp_size = offsetofend(resp, resp_last_member)
3719
3720 #define UAPI_DEF_WRITE_I_EX(req, req_last_member) \
3721 .write.req_size = offsetofend(req, req_last_member)
3722
3723 const struct uapi_definition uverbs_def_write_intf[] = {
3724 DECLARE_UVERBS_OBJECT(
3725 UVERBS_OBJECT_AH,
3726 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3727 ib_uverbs_create_ah,
3728 UAPI_DEF_WRITE_UDATA_IO(
3729 struct ib_uverbs_create_ah,
3730 struct ib_uverbs_create_ah_resp)),
3731 DECLARE_UVERBS_WRITE(
3732 IB_USER_VERBS_CMD_DESTROY_AH,
3733 ib_uverbs_destroy_ah,
3734 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)),
3735 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah),
3736 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
3737
3738 DECLARE_UVERBS_OBJECT(
3739 UVERBS_OBJECT_COMP_CHANNEL,
3740 DECLARE_UVERBS_WRITE(
3741 IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3742 ib_uverbs_create_comp_channel,
3743 UAPI_DEF_WRITE_IO(
3744 struct ib_uverbs_create_comp_channel,
3745 struct ib_uverbs_create_comp_channel_resp))),
3746
3747 DECLARE_UVERBS_OBJECT(
3748 UVERBS_OBJECT_CQ,
3749 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3750 ib_uverbs_create_cq,
3751 UAPI_DEF_WRITE_UDATA_IO(
3752 struct ib_uverbs_create_cq,
3753 struct ib_uverbs_create_cq_resp),
3754 UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3755 DECLARE_UVERBS_WRITE(
3756 IB_USER_VERBS_CMD_DESTROY_CQ,
3757 ib_uverbs_destroy_cq,
3758 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3759 struct ib_uverbs_destroy_cq_resp),
3760 UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3761 DECLARE_UVERBS_WRITE(
3762 IB_USER_VERBS_CMD_POLL_CQ,
3763 ib_uverbs_poll_cq,
3764 UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3765 struct ib_uverbs_poll_cq_resp),
3766 UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3767 DECLARE_UVERBS_WRITE(
3768 IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3769 ib_uverbs_req_notify_cq,
3770 UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3771 UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3772 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3773 ib_uverbs_resize_cq,
3774 UAPI_DEF_WRITE_UDATA_IO(
3775 struct ib_uverbs_resize_cq,
3776 struct ib_uverbs_resize_cq_resp),
3777 UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3778 DECLARE_UVERBS_WRITE_EX(
3779 IB_USER_VERBS_EX_CMD_CREATE_CQ,
3780 ib_uverbs_ex_create_cq,
3781 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3782 reserved,
3783 struct ib_uverbs_ex_create_cq_resp,
3784 response_length),
3785 UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3786 DECLARE_UVERBS_WRITE_EX(
3787 IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3788 ib_uverbs_ex_modify_cq,
3789 UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3790 UAPI_DEF_METHOD_NEEDS_FN(modify_cq))),
3791
3792 DECLARE_UVERBS_OBJECT(
3793 UVERBS_OBJECT_DEVICE,
3794 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3795 ib_uverbs_get_context,
3796 UAPI_DEF_WRITE_UDATA_IO(
3797 struct ib_uverbs_get_context,
3798 struct ib_uverbs_get_context_resp)),
3799 DECLARE_UVERBS_WRITE(
3800 IB_USER_VERBS_CMD_QUERY_DEVICE,
3801 ib_uverbs_query_device,
3802 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3803 struct ib_uverbs_query_device_resp)),
3804 DECLARE_UVERBS_WRITE(
3805 IB_USER_VERBS_CMD_QUERY_PORT,
3806 ib_uverbs_query_port,
3807 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3808 struct ib_uverbs_query_port_resp),
3809 UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3810 DECLARE_UVERBS_WRITE_EX(
3811 IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3812 ib_uverbs_ex_query_device,
3813 UAPI_DEF_WRITE_IO_EX(
3814 struct ib_uverbs_ex_query_device,
3815 reserved,
3816 struct ib_uverbs_ex_query_device_resp,
3817 response_length),
3818 UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3819 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3820 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3821
3822 DECLARE_UVERBS_OBJECT(
3823 UVERBS_OBJECT_FLOW,
3824 DECLARE_UVERBS_WRITE_EX(
3825 IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3826 ib_uverbs_ex_create_flow,
3827 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3828 flow_attr,
3829 struct ib_uverbs_create_flow_resp,
3830 flow_handle),
3831 UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3832 DECLARE_UVERBS_WRITE_EX(
3833 IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3834 ib_uverbs_ex_destroy_flow,
3835 UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3836 UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3837
3838 DECLARE_UVERBS_OBJECT(
3839 UVERBS_OBJECT_MR,
3840 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3841 ib_uverbs_dereg_mr,
3842 UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3843 UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3844 DECLARE_UVERBS_WRITE(
3845 IB_USER_VERBS_CMD_REG_MR,
3846 ib_uverbs_reg_mr,
3847 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3848 struct ib_uverbs_reg_mr_resp),
3849 UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3850 DECLARE_UVERBS_WRITE(
3851 IB_USER_VERBS_CMD_REREG_MR,
3852 ib_uverbs_rereg_mr,
3853 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3854 struct ib_uverbs_rereg_mr_resp),
3855 UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3856
3857 DECLARE_UVERBS_OBJECT(
3858 UVERBS_OBJECT_MW,
3859 DECLARE_UVERBS_WRITE(
3860 IB_USER_VERBS_CMD_ALLOC_MW,
3861 ib_uverbs_alloc_mw,
3862 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3863 struct ib_uverbs_alloc_mw_resp),
3864 UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3865 DECLARE_UVERBS_WRITE(
3866 IB_USER_VERBS_CMD_DEALLOC_MW,
3867 ib_uverbs_dealloc_mw,
3868 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3869 UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3870
3871 DECLARE_UVERBS_OBJECT(
3872 UVERBS_OBJECT_PD,
3873 DECLARE_UVERBS_WRITE(
3874 IB_USER_VERBS_CMD_ALLOC_PD,
3875 ib_uverbs_alloc_pd,
3876 UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3877 struct ib_uverbs_alloc_pd_resp),
3878 UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3879 DECLARE_UVERBS_WRITE(
3880 IB_USER_VERBS_CMD_DEALLOC_PD,
3881 ib_uverbs_dealloc_pd,
3882 UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3883 UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3884
3885 DECLARE_UVERBS_OBJECT(
3886 UVERBS_OBJECT_QP,
3887 DECLARE_UVERBS_WRITE(
3888 IB_USER_VERBS_CMD_ATTACH_MCAST,
3889 ib_uverbs_attach_mcast,
3890 UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3891 UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3892 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3893 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3894 ib_uverbs_create_qp,
3895 UAPI_DEF_WRITE_UDATA_IO(
3896 struct ib_uverbs_create_qp,
3897 struct ib_uverbs_create_qp_resp),
3898 UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3899 DECLARE_UVERBS_WRITE(
3900 IB_USER_VERBS_CMD_DESTROY_QP,
3901 ib_uverbs_destroy_qp,
3902 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3903 struct ib_uverbs_destroy_qp_resp),
3904 UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3905 DECLARE_UVERBS_WRITE(
3906 IB_USER_VERBS_CMD_DETACH_MCAST,
3907 ib_uverbs_detach_mcast,
3908 UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3909 UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3910 DECLARE_UVERBS_WRITE(
3911 IB_USER_VERBS_CMD_MODIFY_QP,
3912 ib_uverbs_modify_qp,
3913 UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3914 UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3915 DECLARE_UVERBS_WRITE(
3916 IB_USER_VERBS_CMD_POST_RECV,
3917 ib_uverbs_post_recv,
3918 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3919 struct ib_uverbs_post_recv_resp),
3920 UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3921 DECLARE_UVERBS_WRITE(
3922 IB_USER_VERBS_CMD_POST_SEND,
3923 ib_uverbs_post_send,
3924 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3925 struct ib_uverbs_post_send_resp),
3926 UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3927 DECLARE_UVERBS_WRITE(
3928 IB_USER_VERBS_CMD_QUERY_QP,
3929 ib_uverbs_query_qp,
3930 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3931 struct ib_uverbs_query_qp_resp),
3932 UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3933 DECLARE_UVERBS_WRITE_EX(
3934 IB_USER_VERBS_EX_CMD_CREATE_QP,
3935 ib_uverbs_ex_create_qp,
3936 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3937 comp_mask,
3938 struct ib_uverbs_ex_create_qp_resp,
3939 response_length),
3940 UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3941 DECLARE_UVERBS_WRITE_EX(
3942 IB_USER_VERBS_EX_CMD_MODIFY_QP,
3943 ib_uverbs_ex_modify_qp,
3944 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3945 base,
3946 struct ib_uverbs_ex_modify_qp_resp,
3947 response_length),
3948 UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3949
3950 DECLARE_UVERBS_OBJECT(
3951 UVERBS_OBJECT_RWQ_IND_TBL,
3952 DECLARE_UVERBS_WRITE_EX(
3953 IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
3954 ib_uverbs_ex_create_rwq_ind_table,
3955 UAPI_DEF_WRITE_IO_EX(
3956 struct ib_uverbs_ex_create_rwq_ind_table,
3957 log_ind_tbl_size,
3958 struct ib_uverbs_ex_create_rwq_ind_table_resp,
3959 ind_tbl_num),
3960 UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
3961 DECLARE_UVERBS_WRITE_EX(
3962 IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
3963 ib_uverbs_ex_destroy_rwq_ind_table,
3964 UAPI_DEF_WRITE_I(
3965 struct ib_uverbs_ex_destroy_rwq_ind_table),
3966 UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
3967
3968 DECLARE_UVERBS_OBJECT(
3969 UVERBS_OBJECT_WQ,
3970 DECLARE_UVERBS_WRITE_EX(
3971 IB_USER_VERBS_EX_CMD_CREATE_WQ,
3972 ib_uverbs_ex_create_wq,
3973 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
3974 max_sge,
3975 struct ib_uverbs_ex_create_wq_resp,
3976 wqn),
3977 UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
3978 DECLARE_UVERBS_WRITE_EX(
3979 IB_USER_VERBS_EX_CMD_DESTROY_WQ,
3980 ib_uverbs_ex_destroy_wq,
3981 UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
3982 wq_handle,
3983 struct ib_uverbs_ex_destroy_wq_resp,
3984 reserved),
3985 UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
3986 DECLARE_UVERBS_WRITE_EX(
3987 IB_USER_VERBS_EX_CMD_MODIFY_WQ,
3988 ib_uverbs_ex_modify_wq,
3989 UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
3990 curr_wq_state),
3991 UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
3992
3993 DECLARE_UVERBS_OBJECT(
3994 UVERBS_OBJECT_SRQ,
3995 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
3996 ib_uverbs_create_srq,
3997 UAPI_DEF_WRITE_UDATA_IO(
3998 struct ib_uverbs_create_srq,
3999 struct ib_uverbs_create_srq_resp),
4000 UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4001 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4002 ib_uverbs_create_xsrq,
4003 UAPI_DEF_WRITE_UDATA_IO(
4004 struct ib_uverbs_create_xsrq,
4005 struct ib_uverbs_create_srq_resp),
4006 UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4007 DECLARE_UVERBS_WRITE(
4008 IB_USER_VERBS_CMD_DESTROY_SRQ,
4009 ib_uverbs_destroy_srq,
4010 UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4011 struct ib_uverbs_destroy_srq_resp),
4012 UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4013 DECLARE_UVERBS_WRITE(
4014 IB_USER_VERBS_CMD_MODIFY_SRQ,
4015 ib_uverbs_modify_srq,
4016 UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4017 UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4018 DECLARE_UVERBS_WRITE(
4019 IB_USER_VERBS_CMD_POST_SRQ_RECV,
4020 ib_uverbs_post_srq_recv,
4021 UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4022 struct ib_uverbs_post_srq_recv_resp),
4023 UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4024 DECLARE_UVERBS_WRITE(
4025 IB_USER_VERBS_CMD_QUERY_SRQ,
4026 ib_uverbs_query_srq,
4027 UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4028 struct ib_uverbs_query_srq_resp),
4029 UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4030
4031 DECLARE_UVERBS_OBJECT(
4032 UVERBS_OBJECT_XRCD,
4033 DECLARE_UVERBS_WRITE(
4034 IB_USER_VERBS_CMD_CLOSE_XRCD,
4035 ib_uverbs_close_xrcd,
4036 UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)),
4037 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4038 ib_uverbs_open_qp,
4039 UAPI_DEF_WRITE_UDATA_IO(
4040 struct ib_uverbs_open_qp,
4041 struct ib_uverbs_create_qp_resp)),
4042 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4043 ib_uverbs_open_xrcd,
4044 UAPI_DEF_WRITE_UDATA_IO(
4045 struct ib_uverbs_open_xrcd,
4046 struct ib_uverbs_open_xrcd_resp)),
4047 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd),
4048 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
4049
4050 {},
4051 };
Kernel DRM miscellaneous fixes and cross-tree changes