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 */
36 #include <linux/file.h>
37 #include <linux/fs.h>
38 #include <linux/slab.h>
39 #include <linux/sched.h>
41 #include <linux/uaccess.h>
43 #include <rdma/uverbs_types.h>
44 #include <rdma/uverbs_std_types.h>
45 #include "rdma_core.h"
47 #include "uverbs.h"
48 #include "core_priv.h"
50 static struct ib_uverbs_completion_event_file *
51 _ib_uverbs_lookup_comp_file(s32 fd, struct ib_uverbs_file *ufile)
52 {
53 struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL,
54 fd, ufile);
56 if (IS_ERR(uobj))
57 return (void *)uobj;
59 uverbs_uobject_get(uobj);
60 uobj_put_read(uobj);
62 return container_of(uobj, struct ib_uverbs_completion_event_file,
63 uobj);
64 }
65 #define ib_uverbs_lookup_comp_file(_fd, _ufile) \
66 _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile)
68 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
69 const char __user *buf,
70 int in_len, int out_len)
71 {
72 struct ib_uverbs_get_context cmd;
73 struct ib_uverbs_get_context_resp resp;
74 struct ib_udata udata;
75 struct ib_ucontext *ucontext;
76 struct file *filp;
77 struct ib_rdmacg_object cg_obj;
78 struct ib_device *ib_dev;
79 int ret;
81 if (out_len < sizeof resp)
82 return -ENOSPC;
84 if (copy_from_user(&cmd, buf, sizeof cmd))
85 return -EFAULT;
87 mutex_lock(&file->ucontext_lock);
88 ib_dev = srcu_dereference(file->device->ib_dev,
89 &file->device->disassociate_srcu);
90 if (!ib_dev) {
91 ret = -EIO;
92 goto err;
93 }
95 if (file->ucontext) {
96 ret = -EINVAL;
97 goto err;
98 }
100 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
101 u64_to_user_ptr(cmd.response) + sizeof(resp),
102 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
103 out_len - sizeof(resp));
105 ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
106 if (ret)
107 goto err;
109 ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
110 if (IS_ERR(ucontext)) {
111 ret = PTR_ERR(ucontext);
112 goto err_alloc;
113 }
115 ucontext->device = ib_dev;
116 ucontext->cg_obj = cg_obj;
117 /* ufile is required when some objects are released */
118 ucontext->ufile = file;
120 rcu_read_lock();
121 ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
122 rcu_read_unlock();
123 ucontext->closing = 0;
124 ucontext->cleanup_retryable = false;
126 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
127 ucontext->umem_tree = RB_ROOT_CACHED;
128 init_rwsem(&ucontext->umem_rwsem);
129 ucontext->odp_mrs_count = 0;
130 INIT_LIST_HEAD(&ucontext->no_private_counters);
132 if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
133 ucontext->invalidate_range = NULL;
135 #endif
137 resp.num_comp_vectors = file->device->num_comp_vectors;
139 ret = get_unused_fd_flags(O_CLOEXEC);
140 if (ret < 0)
141 goto err_free;
142 resp.async_fd = ret;
144 filp = ib_uverbs_alloc_async_event_file(file, ib_dev);
145 if (IS_ERR(filp)) {
146 ret = PTR_ERR(filp);
147 goto err_fd;
148 }
150 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
151 ret = -EFAULT;
152 goto err_file;
153 }
155 fd_install(resp.async_fd, filp);
157 /*
158 * Make sure that ib_uverbs_get_ucontext() sees the pointer update
159 * only after all writes to setup the ucontext have completed
160 */
161 smp_store_release(&file->ucontext, ucontext);
163 mutex_unlock(&file->ucontext_lock);
165 return in_len;
167 err_file:
168 ib_uverbs_free_async_event_file(file);
169 fput(filp);
171 err_fd:
172 put_unused_fd(resp.async_fd);
174 err_free:
175 put_pid(ucontext->tgid);
176 ib_dev->dealloc_ucontext(ucontext);
178 err_alloc:
179 ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
181 err:
182 mutex_unlock(&file->ucontext_lock);
183 return ret;
184 }
186 static void copy_query_dev_fields(struct ib_ucontext *ucontext,
187 struct ib_uverbs_query_device_resp *resp,
188 struct ib_device_attr *attr)
189 {
190 struct ib_device *ib_dev = ucontext->device;
192 resp->fw_ver = attr->fw_ver;
193 resp->node_guid = ib_dev->node_guid;
194 resp->sys_image_guid = attr->sys_image_guid;
195 resp->max_mr_size = attr->max_mr_size;
196 resp->page_size_cap = attr->page_size_cap;
197 resp->vendor_id = attr->vendor_id;
198 resp->vendor_part_id = attr->vendor_part_id;
199 resp->hw_ver = attr->hw_ver;
200 resp->max_qp = attr->max_qp;
201 resp->max_qp_wr = attr->max_qp_wr;
202 resp->device_cap_flags = lower_32_bits(attr->device_cap_flags);
203 resp->max_sge = min(attr->max_send_sge, attr->max_recv_sge);
204 resp->max_sge_rd = attr->max_sge_rd;
205 resp->max_cq = attr->max_cq;
206 resp->max_cqe = attr->max_cqe;
207 resp->max_mr = attr->max_mr;
208 resp->max_pd = attr->max_pd;
209 resp->max_qp_rd_atom = attr->max_qp_rd_atom;
210 resp->max_ee_rd_atom = attr->max_ee_rd_atom;
211 resp->max_res_rd_atom = attr->max_res_rd_atom;
212 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom;
213 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom;
214 resp->atomic_cap = attr->atomic_cap;
215 resp->max_ee = attr->max_ee;
216 resp->max_rdd = attr->max_rdd;
217 resp->max_mw = attr->max_mw;
218 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
219 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
220 resp->max_mcast_grp = attr->max_mcast_grp;
221 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
222 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
223 resp->max_ah = attr->max_ah;
224 resp->max_fmr = attr->max_fmr;
225 resp->max_map_per_fmr = attr->max_map_per_fmr;
226 resp->max_srq = attr->max_srq;
227 resp->max_srq_wr = attr->max_srq_wr;
228 resp->max_srq_sge = attr->max_srq_sge;
229 resp->max_pkeys = attr->max_pkeys;
230 resp->local_ca_ack_delay = attr->local_ca_ack_delay;
231 resp->phys_port_cnt = ib_dev->phys_port_cnt;
232 }
234 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
235 const char __user *buf,
236 int in_len, int out_len)
237 {
238 struct ib_uverbs_query_device cmd;
239 struct ib_uverbs_query_device_resp resp;
240 struct ib_ucontext *ucontext;
242 ucontext = ib_uverbs_get_ucontext(file);
243 if (IS_ERR(ucontext))
244 return PTR_ERR(ucontext);
246 if (out_len < sizeof resp)
247 return -ENOSPC;
249 if (copy_from_user(&cmd, buf, sizeof cmd))
250 return -EFAULT;
252 memset(&resp, 0, sizeof resp);
253 copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
255 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
256 return -EFAULT;
258 return in_len;
259 }
261 /*
262 * ib_uverbs_query_port_resp.port_cap_flags started out as just a copy of the
263 * PortInfo CapabilityMask, but was extended with unique bits.
264 */
265 static u32 make_port_cap_flags(const struct ib_port_attr *attr)
266 {
267 u32 res;
269 /* All IBA CapabilityMask bits are passed through here, except bit 26,
270 * which is overridden with IP_BASED_GIDS. This is due to a historical
271 * mistake in the implementation of IP_BASED_GIDS. Otherwise all other
272 * bits match the IBA definition across all kernel versions.
273 */
274 res = attr->port_cap_flags & ~(u32)IB_UVERBS_PCF_IP_BASED_GIDS;
276 if (attr->ip_gids)
277 res |= IB_UVERBS_PCF_IP_BASED_GIDS;
279 return res;
280 }
282 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
283 const char __user *buf,
284 int in_len, int out_len)
285 {
286 struct ib_uverbs_query_port cmd;
287 struct ib_uverbs_query_port_resp resp;
288 struct ib_port_attr attr;
289 int ret;
290 struct ib_ucontext *ucontext;
291 struct ib_device *ib_dev;
293 ucontext = ib_uverbs_get_ucontext(file);
294 if (IS_ERR(ucontext))
295 return PTR_ERR(ucontext);
296 ib_dev = ucontext->device;
298 if (out_len < sizeof resp)
299 return -ENOSPC;
301 if (copy_from_user(&cmd, buf, sizeof cmd))
302 return -EFAULT;
304 ret = ib_query_port(ib_dev, cmd.port_num, &attr);
305 if (ret)
306 return ret;
308 memset(&resp, 0, sizeof resp);
310 resp.state = attr.state;
311 resp.max_mtu = attr.max_mtu;
312 resp.active_mtu = attr.active_mtu;
313 resp.gid_tbl_len = attr.gid_tbl_len;
314 resp.port_cap_flags = make_port_cap_flags(&attr);
315 resp.max_msg_sz = attr.max_msg_sz;
316 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
317 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
318 resp.pkey_tbl_len = attr.pkey_tbl_len;
320 if (rdma_is_grh_required(ib_dev, cmd.port_num))
321 resp.flags |= IB_UVERBS_QPF_GRH_REQUIRED;
323 if (rdma_cap_opa_ah(ib_dev, cmd.port_num)) {
324 resp.lid = OPA_TO_IB_UCAST_LID(attr.lid);
325 resp.sm_lid = OPA_TO_IB_UCAST_LID(attr.sm_lid);
326 } else {
327 resp.lid = ib_lid_cpu16(attr.lid);
328 resp.sm_lid = ib_lid_cpu16(attr.sm_lid);
329 }
330 resp.lmc = attr.lmc;
331 resp.max_vl_num = attr.max_vl_num;
332 resp.sm_sl = attr.sm_sl;
333 resp.subnet_timeout = attr.subnet_timeout;
334 resp.init_type_reply = attr.init_type_reply;
335 resp.active_width = attr.active_width;
336 resp.active_speed = attr.active_speed;
337 resp.phys_state = attr.phys_state;
338 resp.link_layer = rdma_port_get_link_layer(ib_dev,
339 cmd.port_num);
341 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
342 return -EFAULT;
344 return in_len;
345 }
347 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
348 const char __user *buf,
349 int in_len, int out_len)
350 {
351 struct ib_uverbs_alloc_pd cmd;
352 struct ib_uverbs_alloc_pd_resp resp;
353 struct ib_udata udata;
354 struct ib_uobject *uobj;
355 struct ib_pd *pd;
356 int ret;
357 struct ib_device *ib_dev;
359 if (out_len < sizeof resp)
360 return -ENOSPC;
362 if (copy_from_user(&cmd, buf, sizeof cmd))
363 return -EFAULT;
365 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
366 u64_to_user_ptr(cmd.response) + sizeof(resp),
367 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
368 out_len - sizeof(resp));
370 uobj = uobj_alloc(UVERBS_OBJECT_PD, file, &ib_dev);
371 if (IS_ERR(uobj))
372 return PTR_ERR(uobj);
374 pd = ib_dev->alloc_pd(ib_dev, uobj->context, &udata);
375 if (IS_ERR(pd)) {
376 ret = PTR_ERR(pd);
377 goto err;
378 }
380 pd->device = ib_dev;
381 pd->uobject = uobj;
382 pd->__internal_mr = NULL;
383 atomic_set(&pd->usecnt, 0);
385 uobj->object = pd;
386 memset(&resp, 0, sizeof resp);
387 resp.pd_handle = uobj->id;
388 pd->res.type = RDMA_RESTRACK_PD;
389 rdma_restrack_add(&pd->res);
391 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
392 ret = -EFAULT;
393 goto err_copy;
394 }
396 return uobj_alloc_commit(uobj, in_len);
398 err_copy:
399 ib_dealloc_pd(pd);
401 err:
402 uobj_alloc_abort(uobj);
403 return ret;
404 }
406 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
407 const char __user *buf,
408 int in_len, int out_len)
409 {
410 struct ib_uverbs_dealloc_pd cmd;
412 if (copy_from_user(&cmd, buf, sizeof cmd))
413 return -EFAULT;
415 return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, file,
416 in_len);
417 }
419 struct xrcd_table_entry {
420 struct rb_node node;
421 struct ib_xrcd *xrcd;
422 struct inode *inode;
423 };
425 static int xrcd_table_insert(struct ib_uverbs_device *dev,
426 struct inode *inode,
427 struct ib_xrcd *xrcd)
428 {
429 struct xrcd_table_entry *entry, *scan;
430 struct rb_node **p = &dev->xrcd_tree.rb_node;
431 struct rb_node *parent = NULL;
433 entry = kmalloc(sizeof *entry, GFP_KERNEL);
434 if (!entry)
435 return -ENOMEM;
437 entry->xrcd = xrcd;
438 entry->inode = inode;
440 while (*p) {
441 parent = *p;
442 scan = rb_entry(parent, struct xrcd_table_entry, node);
444 if (inode < scan->inode) {
445 p = &(*p)->rb_left;
446 } else if (inode > scan->inode) {
447 p = &(*p)->rb_right;
448 } else {
449 kfree(entry);
450 return -EEXIST;
451 }
452 }
454 rb_link_node(&entry->node, parent, p);
455 rb_insert_color(&entry->node, &dev->xrcd_tree);
456 igrab(inode);
457 return 0;
458 }
460 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
461 struct inode *inode)
462 {
463 struct xrcd_table_entry *entry;
464 struct rb_node *p = dev->xrcd_tree.rb_node;
466 while (p) {
467 entry = rb_entry(p, struct xrcd_table_entry, node);
469 if (inode < entry->inode)
470 p = p->rb_left;
471 else if (inode > entry->inode)
472 p = p->rb_right;
473 else
474 return entry;
475 }
477 return NULL;
478 }
480 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
481 {
482 struct xrcd_table_entry *entry;
484 entry = xrcd_table_search(dev, inode);
485 if (!entry)
486 return NULL;
488 return entry->xrcd;
489 }
491 static void xrcd_table_delete(struct ib_uverbs_device *dev,
492 struct inode *inode)
493 {
494 struct xrcd_table_entry *entry;
496 entry = xrcd_table_search(dev, inode);
497 if (entry) {
498 iput(inode);
499 rb_erase(&entry->node, &dev->xrcd_tree);
500 kfree(entry);
501 }
502 }
504 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
505 const char __user *buf, int in_len,
506 int out_len)
507 {
508 struct ib_uverbs_open_xrcd cmd;
509 struct ib_uverbs_open_xrcd_resp resp;
510 struct ib_udata udata;
511 struct ib_uxrcd_object *obj;
512 struct ib_xrcd *xrcd = NULL;
513 struct fd f = {NULL, 0};
514 struct inode *inode = NULL;
515 int ret = 0;
516 int new_xrcd = 0;
517 struct ib_device *ib_dev;
519 if (out_len < sizeof resp)
520 return -ENOSPC;
522 if (copy_from_user(&cmd, buf, sizeof cmd))
523 return -EFAULT;
525 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
526 u64_to_user_ptr(cmd.response) + sizeof(resp),
527 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
528 out_len - sizeof(resp));
530 mutex_lock(&file->device->xrcd_tree_mutex);
532 if (cmd.fd != -1) {
533 /* search for file descriptor */
534 f = fdget(cmd.fd);
535 if (!f.file) {
536 ret = -EBADF;
537 goto err_tree_mutex_unlock;
538 }
540 inode = file_inode(f.file);
541 xrcd = find_xrcd(file->device, inode);
542 if (!xrcd && !(cmd.oflags & O_CREAT)) {
543 /* no file descriptor. Need CREATE flag */
544 ret = -EAGAIN;
545 goto err_tree_mutex_unlock;
546 }
548 if (xrcd && cmd.oflags & O_EXCL) {
549 ret = -EINVAL;
550 goto err_tree_mutex_unlock;
551 }
552 }
554 obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, file,
555 &ib_dev);
556 if (IS_ERR(obj)) {
557 ret = PTR_ERR(obj);
558 goto err_tree_mutex_unlock;
559 }
561 if (!xrcd) {
562 xrcd = ib_dev->alloc_xrcd(ib_dev, obj->uobject.context, &udata);
563 if (IS_ERR(xrcd)) {
564 ret = PTR_ERR(xrcd);
565 goto err;
566 }
568 xrcd->inode = inode;
569 xrcd->device = ib_dev;
570 atomic_set(&xrcd->usecnt, 0);
571 mutex_init(&xrcd->tgt_qp_mutex);
572 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
573 new_xrcd = 1;
574 }
576 atomic_set(&obj->refcnt, 0);
577 obj->uobject.object = xrcd;
578 memset(&resp, 0, sizeof resp);
579 resp.xrcd_handle = obj->uobject.id;
581 if (inode) {
582 if (new_xrcd) {
583 /* create new inode/xrcd table entry */
584 ret = xrcd_table_insert(file->device, inode, xrcd);
585 if (ret)
586 goto err_dealloc_xrcd;
587 }
588 atomic_inc(&xrcd->usecnt);
589 }
591 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
592 ret = -EFAULT;
593 goto err_copy;
594 }
596 if (f.file)
597 fdput(f);
599 mutex_unlock(&file->device->xrcd_tree_mutex);
601 return uobj_alloc_commit(&obj->uobject, in_len);
603 err_copy:
604 if (inode) {
605 if (new_xrcd)
606 xrcd_table_delete(file->device, inode);
607 atomic_dec(&xrcd->usecnt);
608 }
610 err_dealloc_xrcd:
611 ib_dealloc_xrcd(xrcd);
613 err:
614 uobj_alloc_abort(&obj->uobject);
616 err_tree_mutex_unlock:
617 if (f.file)
618 fdput(f);
620 mutex_unlock(&file->device->xrcd_tree_mutex);
622 return ret;
623 }
625 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
626 const char __user *buf, int in_len,
627 int out_len)
628 {
629 struct ib_uverbs_close_xrcd cmd;
631 if (copy_from_user(&cmd, buf, sizeof cmd))
632 return -EFAULT;
634 return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, file,
635 in_len);
636 }
638 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject,
639 struct ib_xrcd *xrcd,
640 enum rdma_remove_reason why)
641 {
642 struct inode *inode;
643 int ret;
644 struct ib_uverbs_device *dev = uobject->context->ufile->device;
646 inode = xrcd->inode;
647 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
648 return 0;
650 ret = ib_dealloc_xrcd(xrcd);
652 if (ib_is_destroy_retryable(ret, why, uobject)) {
653 atomic_inc(&xrcd->usecnt);
654 return ret;
655 }
657 if (inode)
658 xrcd_table_delete(dev, inode);
660 return ret;
661 }
663 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
664 const char __user *buf, int in_len,
665 int out_len)
666 {
667 struct ib_uverbs_reg_mr cmd;
668 struct ib_uverbs_reg_mr_resp resp;
669 struct ib_udata udata;
670 struct ib_uobject *uobj;
671 struct ib_pd *pd;
672 struct ib_mr *mr;
673 int ret;
674 struct ib_device *ib_dev;
676 if (out_len < sizeof resp)
677 return -ENOSPC;
679 if (copy_from_user(&cmd, buf, sizeof cmd))
680 return -EFAULT;
682 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
683 u64_to_user_ptr(cmd.response) + sizeof(resp),
684 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
685 out_len - sizeof(resp));
687 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
688 return -EINVAL;
690 ret = ib_check_mr_access(cmd.access_flags);
691 if (ret)
692 return ret;
694 uobj = uobj_alloc(UVERBS_OBJECT_MR, file, &ib_dev);
695 if (IS_ERR(uobj))
696 return PTR_ERR(uobj);
698 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file);
699 if (!pd) {
700 ret = -EINVAL;
701 goto err_free;
702 }
704 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
705 if (!(pd->device->attrs.device_cap_flags &
706 IB_DEVICE_ON_DEMAND_PAGING)) {
707 pr_debug("ODP support not available\n");
708 ret = -EINVAL;
709 goto err_put;
710 }
711 }
713 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
714 cmd.access_flags, &udata);
715 if (IS_ERR(mr)) {
716 ret = PTR_ERR(mr);
717 goto err_put;
718 }
720 mr->device = pd->device;
721 mr->pd = pd;
722 mr->dm = NULL;
723 mr->uobject = uobj;
724 atomic_inc(&pd->usecnt);
725 mr->res.type = RDMA_RESTRACK_MR;
726 rdma_restrack_add(&mr->res);
728 uobj->object = mr;
730 memset(&resp, 0, sizeof resp);
731 resp.lkey = mr->lkey;
732 resp.rkey = mr->rkey;
733 resp.mr_handle = uobj->id;
735 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
736 ret = -EFAULT;
737 goto err_copy;
738 }
740 uobj_put_obj_read(pd);
742 return uobj_alloc_commit(uobj, in_len);
744 err_copy:
745 ib_dereg_mr(mr);
747 err_put:
748 uobj_put_obj_read(pd);
750 err_free:
751 uobj_alloc_abort(uobj);
752 return ret;
753 }
755 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
756 const char __user *buf, int in_len,
757 int out_len)
758 {
759 struct ib_uverbs_rereg_mr cmd;
760 struct ib_uverbs_rereg_mr_resp resp;
761 struct ib_udata udata;
762 struct ib_pd *pd = NULL;
763 struct ib_mr *mr;
764 struct ib_pd *old_pd;
765 int ret;
766 struct ib_uobject *uobj;
768 if (out_len < sizeof(resp))
769 return -ENOSPC;
771 if (copy_from_user(&cmd, buf, sizeof(cmd)))
772 return -EFAULT;
774 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
775 u64_to_user_ptr(cmd.response) + sizeof(resp),
776 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
777 out_len - sizeof(resp));
779 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
780 return -EINVAL;
782 if ((cmd.flags & IB_MR_REREG_TRANS) &&
783 (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
784 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
785 return -EINVAL;
787 uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, file);
788 if (IS_ERR(uobj))
789 return PTR_ERR(uobj);
791 mr = uobj->object;
793 if (mr->dm) {
794 ret = -EINVAL;
795 goto put_uobjs;
796 }
798 if (cmd.flags & IB_MR_REREG_ACCESS) {
799 ret = ib_check_mr_access(cmd.access_flags);
800 if (ret)
801 goto put_uobjs;
802 }
804 if (cmd.flags & IB_MR_REREG_PD) {
805 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
806 file);
807 if (!pd) {
808 ret = -EINVAL;
809 goto put_uobjs;
810 }
811 }
813 old_pd = mr->pd;
814 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
815 cmd.length, cmd.hca_va,
816 cmd.access_flags, pd, &udata);
817 if (!ret) {
818 if (cmd.flags & IB_MR_REREG_PD) {
819 atomic_inc(&pd->usecnt);
820 mr->pd = pd;
821 atomic_dec(&old_pd->usecnt);
822 }
823 } else {
824 goto put_uobj_pd;
825 }
827 memset(&resp, 0, sizeof(resp));
828 resp.lkey = mr->lkey;
829 resp.rkey = mr->rkey;
831 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
832 ret = -EFAULT;
833 else
834 ret = in_len;
836 put_uobj_pd:
837 if (cmd.flags & IB_MR_REREG_PD)
838 uobj_put_obj_read(pd);
840 put_uobjs:
841 uobj_put_write(uobj);
843 return ret;
844 }
846 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
847 const char __user *buf, int in_len,
848 int out_len)
849 {
850 struct ib_uverbs_dereg_mr cmd;
852 if (copy_from_user(&cmd, buf, sizeof cmd))
853 return -EFAULT;
855 return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, file,
856 in_len);
857 }
859 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
860 const char __user *buf, int in_len,
861 int out_len)
862 {
863 struct ib_uverbs_alloc_mw cmd;
864 struct ib_uverbs_alloc_mw_resp resp;
865 struct ib_uobject *uobj;
866 struct ib_pd *pd;
867 struct ib_mw *mw;
868 struct ib_udata udata;
869 int ret;
870 struct ib_device *ib_dev;
872 if (out_len < sizeof(resp))
873 return -ENOSPC;
875 if (copy_from_user(&cmd, buf, sizeof(cmd)))
876 return -EFAULT;
878 uobj = uobj_alloc(UVERBS_OBJECT_MW, file, &ib_dev);
879 if (IS_ERR(uobj))
880 return PTR_ERR(uobj);
882 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file);
883 if (!pd) {
884 ret = -EINVAL;
885 goto err_free;
886 }
888 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
889 u64_to_user_ptr(cmd.response) + sizeof(resp),
890 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
891 out_len - sizeof(resp));
893 mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata);
894 if (IS_ERR(mw)) {
895 ret = PTR_ERR(mw);
896 goto err_put;
897 }
899 mw->device = pd->device;
900 mw->pd = pd;
901 mw->uobject = uobj;
902 atomic_inc(&pd->usecnt);
904 uobj->object = mw;
906 memset(&resp, 0, sizeof(resp));
907 resp.rkey = mw->rkey;
908 resp.mw_handle = uobj->id;
910 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) {
911 ret = -EFAULT;
912 goto err_copy;
913 }
915 uobj_put_obj_read(pd);
916 return uobj_alloc_commit(uobj, in_len);
918 err_copy:
919 uverbs_dealloc_mw(mw);
920 err_put:
921 uobj_put_obj_read(pd);
922 err_free:
923 uobj_alloc_abort(uobj);
924 return ret;
925 }
927 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
928 const char __user *buf, int in_len,
929 int out_len)
930 {
931 struct ib_uverbs_dealloc_mw cmd;
933 if (copy_from_user(&cmd, buf, sizeof(cmd)))
934 return -EFAULT;
936 return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, file,
937 in_len);
938 }
940 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
941 const char __user *buf, int in_len,
942 int out_len)
943 {
944 struct ib_uverbs_create_comp_channel cmd;
945 struct ib_uverbs_create_comp_channel_resp resp;
946 struct ib_uobject *uobj;
947 struct ib_uverbs_completion_event_file *ev_file;
948 struct ib_device *ib_dev;
950 if (out_len < sizeof resp)
951 return -ENOSPC;
953 if (copy_from_user(&cmd, buf, sizeof cmd))
954 return -EFAULT;
956 uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, file, &ib_dev);
957 if (IS_ERR(uobj))
958 return PTR_ERR(uobj);
960 resp.fd = uobj->id;
962 ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
963 uobj);
964 ib_uverbs_init_event_queue(&ev_file->ev_queue);
966 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
967 uobj_alloc_abort(uobj);
968 return -EFAULT;
969 }
971 return uobj_alloc_commit(uobj, in_len);
972 }
974 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
975 struct ib_udata *ucore,
976 struct ib_udata *uhw,
977 struct ib_uverbs_ex_create_cq *cmd,
978 size_t cmd_sz,
979 int (*cb)(struct ib_uverbs_file *file,
980 struct ib_ucq_object *obj,
981 struct ib_uverbs_ex_create_cq_resp *resp,
982 struct ib_udata *udata,
983 void *context),
984 void *context)
985 {
986 struct ib_ucq_object *obj;
987 struct ib_uverbs_completion_event_file *ev_file = NULL;
988 struct ib_cq *cq;
989 int ret;
990 struct ib_uverbs_ex_create_cq_resp resp;
991 struct ib_cq_init_attr attr = {};
992 struct ib_device *ib_dev;
994 if (cmd->comp_vector >= file->device->num_comp_vectors)
995 return ERR_PTR(-EINVAL);
997 obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, file,
998 &ib_dev);
999 if (IS_ERR(obj))
1000 return obj;
1002 if (!ib_dev->create_cq) {
1003 ret = -EOPNOTSUPP;
1004 goto err;
1005 }
1007 if (cmd->comp_channel >= 0) {
1008 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, file);
1009 if (IS_ERR(ev_file)) {
1010 ret = PTR_ERR(ev_file);
1011 goto err;
1012 }
1013 }
1015 obj->uobject.user_handle = cmd->user_handle;
1016 obj->comp_events_reported = 0;
1017 obj->async_events_reported = 0;
1018 INIT_LIST_HEAD(&obj->comp_list);
1019 INIT_LIST_HEAD(&obj->async_list);
1021 attr.cqe = cmd->cqe;
1022 attr.comp_vector = cmd->comp_vector;
1024 if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1025 attr.flags = cmd->flags;
1027 cq = ib_dev->create_cq(ib_dev, &attr, obj->uobject.context, uhw);
1028 if (IS_ERR(cq)) {
1029 ret = PTR_ERR(cq);
1030 goto err_file;
1031 }
1033 cq->device = ib_dev;
1034 cq->uobject = &obj->uobject;
1035 cq->comp_handler = ib_uverbs_comp_handler;
1036 cq->event_handler = ib_uverbs_cq_event_handler;
1037 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL;
1038 atomic_set(&cq->usecnt, 0);
1040 obj->uobject.object = cq;
1041 memset(&resp, 0, sizeof resp);
1042 resp.base.cq_handle = obj->uobject.id;
1043 resp.base.cqe = cq->cqe;
1045 resp.response_length = offsetof(typeof(resp), response_length) +
1046 sizeof(resp.response_length);
1048 cq->res.type = RDMA_RESTRACK_CQ;
1049 rdma_restrack_add(&cq->res);
1051 ret = cb(file, obj, &resp, ucore, context);
1052 if (ret)
1053 goto err_cb;
1055 ret = uobj_alloc_commit(&obj->uobject, 0);
1056 if (ret)
1057 return ERR_PTR(ret);
1058 return obj;
1060 err_cb:
1061 ib_destroy_cq(cq);
1063 err_file:
1064 if (ev_file)
1065 ib_uverbs_release_ucq(file, ev_file, obj);
1067 err:
1068 uobj_alloc_abort(&obj->uobject);
1070 return ERR_PTR(ret);
1071 }
1073 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1074 struct ib_ucq_object *obj,
1075 struct ib_uverbs_ex_create_cq_resp *resp,
1076 struct ib_udata *ucore, void *context)
1077 {
1078 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1079 return -EFAULT;
1081 return 0;
1082 }
1084 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1085 const char __user *buf, int in_len,
1086 int out_len)
1087 {
1088 struct ib_uverbs_create_cq cmd;
1089 struct ib_uverbs_ex_create_cq cmd_ex;
1090 struct ib_uverbs_create_cq_resp resp;
1091 struct ib_udata ucore;
1092 struct ib_udata uhw;
1093 struct ib_ucq_object *obj;
1095 if (out_len < sizeof(resp))
1096 return -ENOSPC;
1098 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1099 return -EFAULT;
1101 ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1102 sizeof(cmd), sizeof(resp));
1104 ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1105 u64_to_user_ptr(cmd.response) + sizeof(resp),
1106 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1107 out_len - sizeof(resp));
1109 memset(&cmd_ex, 0, sizeof(cmd_ex));
1110 cmd_ex.user_handle = cmd.user_handle;
1111 cmd_ex.cqe = cmd.cqe;
1112 cmd_ex.comp_vector = cmd.comp_vector;
1113 cmd_ex.comp_channel = cmd.comp_channel;
1115 obj = create_cq(file, &ucore, &uhw, &cmd_ex,
1116 offsetof(typeof(cmd_ex), comp_channel) +
1117 sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1118 NULL);
1120 if (IS_ERR(obj))
1121 return PTR_ERR(obj);
1123 return in_len;
1124 }
1126 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1127 struct ib_ucq_object *obj,
1128 struct ib_uverbs_ex_create_cq_resp *resp,
1129 struct ib_udata *ucore, void *context)
1130 {
1131 if (ib_copy_to_udata(ucore, resp, resp->response_length))
1132 return -EFAULT;
1134 return 0;
1135 }
1137 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1138 struct ib_udata *ucore,
1139 struct ib_udata *uhw)
1140 {
1141 struct ib_uverbs_ex_create_cq_resp resp;
1142 struct ib_uverbs_ex_create_cq cmd;
1143 struct ib_ucq_object *obj;
1144 int err;
1146 if (ucore->inlen < sizeof(cmd))
1147 return -EINVAL;
1149 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1150 if (err)
1151 return err;
1153 if (cmd.comp_mask)
1154 return -EINVAL;
1156 if (cmd.reserved)
1157 return -EINVAL;
1159 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1160 sizeof(resp.response_length)))
1161 return -ENOSPC;
1163 obj = create_cq(file, ucore, uhw, &cmd,
1164 min(ucore->inlen, sizeof(cmd)),
1165 ib_uverbs_ex_create_cq_cb, NULL);
1167 return PTR_ERR_OR_ZERO(obj);
1168 }
1170 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1171 const char __user *buf, int in_len,
1172 int out_len)
1173 {
1174 struct ib_uverbs_resize_cq cmd;
1175 struct ib_uverbs_resize_cq_resp resp = {};
1176 struct ib_udata udata;
1177 struct ib_cq *cq;
1178 int ret = -EINVAL;
1180 if (copy_from_user(&cmd, buf, sizeof cmd))
1181 return -EFAULT;
1183 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1184 u64_to_user_ptr(cmd.response) + sizeof(resp),
1185 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1186 out_len - sizeof(resp));
1188 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file);
1189 if (!cq)
1190 return -EINVAL;
1192 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1193 if (ret)
1194 goto out;
1196 resp.cqe = cq->cqe;
1198 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp.cqe))
1199 ret = -EFAULT;
1201 out:
1202 uobj_put_obj_read(cq);
1204 return ret ? ret : in_len;
1205 }
1207 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1208 struct ib_wc *wc)
1209 {
1210 struct ib_uverbs_wc tmp;
1212 tmp.wr_id = wc->wr_id;
1213 tmp.status = wc->status;
1214 tmp.opcode = wc->opcode;
1215 tmp.vendor_err = wc->vendor_err;
1216 tmp.byte_len = wc->byte_len;
1217 tmp.ex.imm_data = wc->ex.imm_data;
1218 tmp.qp_num = wc->qp->qp_num;
1219 tmp.src_qp = wc->src_qp;
1220 tmp.wc_flags = wc->wc_flags;
1221 tmp.pkey_index = wc->pkey_index;
1222 if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1223 tmp.slid = OPA_TO_IB_UCAST_LID(wc->slid);
1224 else
1225 tmp.slid = ib_lid_cpu16(wc->slid);
1226 tmp.sl = wc->sl;
1227 tmp.dlid_path_bits = wc->dlid_path_bits;
1228 tmp.port_num = wc->port_num;
1229 tmp.reserved = 0;
1231 if (copy_to_user(dest, &tmp, sizeof tmp))
1232 return -EFAULT;
1234 return 0;
1235 }
1237 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1238 const char __user *buf, int in_len,
1239 int out_len)
1240 {
1241 struct ib_uverbs_poll_cq cmd;
1242 struct ib_uverbs_poll_cq_resp resp;
1243 u8 __user *header_ptr;
1244 u8 __user *data_ptr;
1245 struct ib_cq *cq;
1246 struct ib_wc wc;
1247 int ret;
1249 if (copy_from_user(&cmd, buf, sizeof cmd))
1250 return -EFAULT;
1252 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file);
1253 if (!cq)
1254 return -EINVAL;
1256 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1257 header_ptr = u64_to_user_ptr(cmd.response);
1258 data_ptr = header_ptr + sizeof resp;
1260 memset(&resp, 0, sizeof resp);
1261 while (resp.count < cmd.ne) {
1262 ret = ib_poll_cq(cq, 1, &wc);
1263 if (ret < 0)
1264 goto out_put;
1265 if (!ret)
1266 break;
1268 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1269 if (ret)
1270 goto out_put;
1272 data_ptr += sizeof(struct ib_uverbs_wc);
1273 ++resp.count;
1274 }
1276 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1277 ret = -EFAULT;
1278 goto out_put;
1279 }
1281 ret = in_len;
1283 out_put:
1284 uobj_put_obj_read(cq);
1285 return ret;
1286 }
1288 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1289 const char __user *buf, int in_len,
1290 int out_len)
1291 {
1292 struct ib_uverbs_req_notify_cq cmd;
1293 struct ib_cq *cq;
1295 if (copy_from_user(&cmd, buf, sizeof cmd))
1296 return -EFAULT;
1298 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file);
1299 if (!cq)
1300 return -EINVAL;
1302 ib_req_notify_cq(cq, cmd.solicited_only ?
1303 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1305 uobj_put_obj_read(cq);
1307 return in_len;
1308 }
1310 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1311 const char __user *buf, int in_len,
1312 int out_len)
1313 {
1314 struct ib_uverbs_destroy_cq cmd;
1315 struct ib_uverbs_destroy_cq_resp resp;
1316 struct ib_uobject *uobj;
1317 struct ib_ucq_object *obj;
1319 if (copy_from_user(&cmd, buf, sizeof cmd))
1320 return -EFAULT;
1322 uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, file);
1323 if (IS_ERR(uobj))
1324 return PTR_ERR(uobj);
1326 obj = container_of(uobj, struct ib_ucq_object, uobject);
1327 memset(&resp, 0, sizeof(resp));
1328 resp.comp_events_reported = obj->comp_events_reported;
1329 resp.async_events_reported = obj->async_events_reported;
1331 uobj_put_destroy(uobj);
1333 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1334 return -EFAULT;
1336 return in_len;
1337 }
1339 static int create_qp(struct ib_uverbs_file *file,
1340 struct ib_udata *ucore,
1341 struct ib_udata *uhw,
1342 struct ib_uverbs_ex_create_qp *cmd,
1343 size_t cmd_sz,
1344 int (*cb)(struct ib_uverbs_file *file,
1345 struct ib_uverbs_ex_create_qp_resp *resp,
1346 struct ib_udata *udata),
1347 void *context)
1348 {
1349 struct ib_uqp_object *obj;
1350 struct ib_device *device;
1351 struct ib_pd *pd = NULL;
1352 struct ib_xrcd *xrcd = NULL;
1353 struct ib_uobject *xrcd_uobj = ERR_PTR(-ENOENT);
1354 struct ib_cq *scq = NULL, *rcq = NULL;
1355 struct ib_srq *srq = NULL;
1356 struct ib_qp *qp;
1357 char *buf;
1358 struct ib_qp_init_attr attr = {};
1359 struct ib_uverbs_ex_create_qp_resp resp;
1360 int ret;
1361 struct ib_rwq_ind_table *ind_tbl = NULL;
1362 bool has_sq = true;
1363 struct ib_device *ib_dev;
1365 if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1366 return -EPERM;
1368 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, file,
1369 &ib_dev);
1370 if (IS_ERR(obj))
1371 return PTR_ERR(obj);
1372 obj->uxrcd = NULL;
1373 obj->uevent.uobject.user_handle = cmd->user_handle;
1374 mutex_init(&obj->mcast_lock);
1376 if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1377 sizeof(cmd->rwq_ind_tbl_handle) &&
1378 (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1379 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1380 UVERBS_OBJECT_RWQ_IND_TBL,
1381 cmd->rwq_ind_tbl_handle, file);
1382 if (!ind_tbl) {
1383 ret = -EINVAL;
1384 goto err_put;
1385 }
1387 attr.rwq_ind_tbl = ind_tbl;
1388 }
1390 if (cmd_sz > sizeof(*cmd) &&
1391 !ib_is_udata_cleared(ucore, sizeof(*cmd),
1392 cmd_sz - sizeof(*cmd))) {
1393 ret = -EOPNOTSUPP;
1394 goto err_put;
1395 }
1397 if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1398 ret = -EINVAL;
1399 goto err_put;
1400 }
1402 if (ind_tbl && !cmd->max_send_wr)
1403 has_sq = false;
1405 if (cmd->qp_type == IB_QPT_XRC_TGT) {
1406 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1407 file);
1409 if (IS_ERR(xrcd_uobj)) {
1410 ret = -EINVAL;
1411 goto err_put;
1412 }
1414 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1415 if (!xrcd) {
1416 ret = -EINVAL;
1417 goto err_put;
1418 }
1419 device = xrcd->device;
1420 } else {
1421 if (cmd->qp_type == IB_QPT_XRC_INI) {
1422 cmd->max_recv_wr = 0;
1423 cmd->max_recv_sge = 0;
1424 } else {
1425 if (cmd->is_srq) {
1426 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1427 cmd->srq_handle, file);
1428 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1429 ret = -EINVAL;
1430 goto err_put;
1431 }
1432 }
1434 if (!ind_tbl) {
1435 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1436 rcq = uobj_get_obj_read(
1437 cq, UVERBS_OBJECT_CQ,
1438 cmd->recv_cq_handle, file);
1439 if (!rcq) {
1440 ret = -EINVAL;
1441 goto err_put;
1442 }
1443 }
1444 }
1445 }
1447 if (has_sq)
1448 scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1449 cmd->send_cq_handle, file);
1450 if (!ind_tbl)
1451 rcq = rcq ?: scq;
1452 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1453 file);
1454 if (!pd || (!scq && has_sq)) {
1455 ret = -EINVAL;
1456 goto err_put;
1457 }
1459 device = pd->device;
1460 }
1462 attr.event_handler = ib_uverbs_qp_event_handler;
1463 attr.qp_context = file;
1464 attr.send_cq = scq;
1465 attr.recv_cq = rcq;
1466 attr.srq = srq;
1467 attr.xrcd = xrcd;
1468 attr.sq_sig_type = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1469 IB_SIGNAL_REQ_WR;
1470 attr.qp_type = cmd->qp_type;
1471 attr.create_flags = 0;
1473 attr.cap.max_send_wr = cmd->max_send_wr;
1474 attr.cap.max_recv_wr = cmd->max_recv_wr;
1475 attr.cap.max_send_sge = cmd->max_send_sge;
1476 attr.cap.max_recv_sge = cmd->max_recv_sge;
1477 attr.cap.max_inline_data = cmd->max_inline_data;
1479 obj->uevent.events_reported = 0;
1480 INIT_LIST_HEAD(&obj->uevent.event_list);
1481 INIT_LIST_HEAD(&obj->mcast_list);
1483 if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1484 sizeof(cmd->create_flags))
1485 attr.create_flags = cmd->create_flags;
1487 if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1488 IB_QP_CREATE_CROSS_CHANNEL |
1489 IB_QP_CREATE_MANAGED_SEND |
1490 IB_QP_CREATE_MANAGED_RECV |
1491 IB_QP_CREATE_SCATTER_FCS |
1492 IB_QP_CREATE_CVLAN_STRIPPING |
1493 IB_QP_CREATE_SOURCE_QPN |
1494 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1495 ret = -EINVAL;
1496 goto err_put;
1497 }
1499 if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1500 if (!capable(CAP_NET_RAW)) {
1501 ret = -EPERM;
1502 goto err_put;
1503 }
1505 attr.source_qpn = cmd->source_qpn;
1506 }
1508 buf = (void *)cmd + sizeof(*cmd);
1509 if (cmd_sz > sizeof(*cmd))
1510 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1511 cmd_sz - sizeof(*cmd) - 1))) {
1512 ret = -EINVAL;
1513 goto err_put;
1514 }
1516 if (cmd->qp_type == IB_QPT_XRC_TGT)
1517 qp = ib_create_qp(pd, &attr);
1518 else
1519 qp = _ib_create_qp(device, pd, &attr, uhw,
1520 &obj->uevent.uobject);
1522 if (IS_ERR(qp)) {
1523 ret = PTR_ERR(qp);
1524 goto err_put;
1525 }
1527 if (cmd->qp_type != IB_QPT_XRC_TGT) {
1528 ret = ib_create_qp_security(qp, device);
1529 if (ret)
1530 goto err_cb;
1532 qp->real_qp = qp;
1533 qp->pd = pd;
1534 qp->send_cq = attr.send_cq;
1535 qp->recv_cq = attr.recv_cq;
1536 qp->srq = attr.srq;
1537 qp->rwq_ind_tbl = ind_tbl;
1538 qp->event_handler = attr.event_handler;
1539 qp->qp_context = attr.qp_context;
1540 qp->qp_type = attr.qp_type;
1541 atomic_set(&qp->usecnt, 0);
1542 atomic_inc(&pd->usecnt);
1543 qp->port = 0;
1544 if (attr.send_cq)
1545 atomic_inc(&attr.send_cq->usecnt);
1546 if (attr.recv_cq)
1547 atomic_inc(&attr.recv_cq->usecnt);
1548 if (attr.srq)
1549 atomic_inc(&attr.srq->usecnt);
1550 if (ind_tbl)
1551 atomic_inc(&ind_tbl->usecnt);
1552 } else {
1553 /* It is done in _ib_create_qp for other QP types */
1554 qp->uobject = &obj->uevent.uobject;
1555 }
1557 obj->uevent.uobject.object = qp;
1559 memset(&resp, 0, sizeof resp);
1560 resp.base.qpn = qp->qp_num;
1561 resp.base.qp_handle = obj->uevent.uobject.id;
1562 resp.base.max_recv_sge = attr.cap.max_recv_sge;
1563 resp.base.max_send_sge = attr.cap.max_send_sge;
1564 resp.base.max_recv_wr = attr.cap.max_recv_wr;
1565 resp.base.max_send_wr = attr.cap.max_send_wr;
1566 resp.base.max_inline_data = attr.cap.max_inline_data;
1568 resp.response_length = offsetof(typeof(resp), response_length) +
1569 sizeof(resp.response_length);
1571 ret = cb(file, &resp, ucore);
1572 if (ret)
1573 goto err_cb;
1575 if (xrcd) {
1576 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1577 uobject);
1578 atomic_inc(&obj->uxrcd->refcnt);
1579 uobj_put_read(xrcd_uobj);
1580 }
1582 if (pd)
1583 uobj_put_obj_read(pd);
1584 if (scq)
1585 uobj_put_obj_read(scq);
1586 if (rcq && rcq != scq)
1587 uobj_put_obj_read(rcq);
1588 if (srq)
1589 uobj_put_obj_read(srq);
1590 if (ind_tbl)
1591 uobj_put_obj_read(ind_tbl);
1593 return uobj_alloc_commit(&obj->uevent.uobject, 0);
1594 err_cb:
1595 ib_destroy_qp(qp);
1597 err_put:
1598 if (!IS_ERR(xrcd_uobj))
1599 uobj_put_read(xrcd_uobj);
1600 if (pd)
1601 uobj_put_obj_read(pd);
1602 if (scq)
1603 uobj_put_obj_read(scq);
1604 if (rcq && rcq != scq)
1605 uobj_put_obj_read(rcq);
1606 if (srq)
1607 uobj_put_obj_read(srq);
1608 if (ind_tbl)
1609 uobj_put_obj_read(ind_tbl);
1611 uobj_alloc_abort(&obj->uevent.uobject);
1612 return ret;
1613 }
1615 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1616 struct ib_uverbs_ex_create_qp_resp *resp,
1617 struct ib_udata *ucore)
1618 {
1619 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1620 return -EFAULT;
1622 return 0;
1623 }
1625 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1626 const char __user *buf, int in_len,
1627 int out_len)
1628 {
1629 struct ib_uverbs_create_qp cmd;
1630 struct ib_uverbs_ex_create_qp cmd_ex;
1631 struct ib_udata ucore;
1632 struct ib_udata uhw;
1633 ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1634 int err;
1636 if (out_len < resp_size)
1637 return -ENOSPC;
1639 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1640 return -EFAULT;
1642 ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1643 sizeof(cmd), resp_size);
1644 ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1645 u64_to_user_ptr(cmd.response) + resp_size,
1646 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1647 out_len - resp_size);
1649 memset(&cmd_ex, 0, sizeof(cmd_ex));
1650 cmd_ex.user_handle = cmd.user_handle;
1651 cmd_ex.pd_handle = cmd.pd_handle;
1652 cmd_ex.send_cq_handle = cmd.send_cq_handle;
1653 cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1654 cmd_ex.srq_handle = cmd.srq_handle;
1655 cmd_ex.max_send_wr = cmd.max_send_wr;
1656 cmd_ex.max_recv_wr = cmd.max_recv_wr;
1657 cmd_ex.max_send_sge = cmd.max_send_sge;
1658 cmd_ex.max_recv_sge = cmd.max_recv_sge;
1659 cmd_ex.max_inline_data = cmd.max_inline_data;
1660 cmd_ex.sq_sig_all = cmd.sq_sig_all;
1661 cmd_ex.qp_type = cmd.qp_type;
1662 cmd_ex.is_srq = cmd.is_srq;
1664 err = create_qp(file, &ucore, &uhw, &cmd_ex,
1665 offsetof(typeof(cmd_ex), is_srq) +
1666 sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1667 NULL);
1669 if (err)
1670 return err;
1672 return in_len;
1673 }
1675 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
1676 struct ib_uverbs_ex_create_qp_resp *resp,
1677 struct ib_udata *ucore)
1678 {
1679 if (ib_copy_to_udata(ucore, resp, resp->response_length))
1680 return -EFAULT;
1682 return 0;
1683 }
1685 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
1686 struct ib_udata *ucore,
1687 struct ib_udata *uhw)
1688 {
1689 struct ib_uverbs_ex_create_qp_resp resp;
1690 struct ib_uverbs_ex_create_qp cmd = {0};
1691 int err;
1693 if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
1694 sizeof(cmd.comp_mask)))
1695 return -EINVAL;
1697 err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
1698 if (err)
1699 return err;
1701 if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1702 return -EINVAL;
1704 if (cmd.reserved)
1705 return -EINVAL;
1707 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1708 sizeof(resp.response_length)))
1709 return -ENOSPC;
1711 err = create_qp(file, ucore, uhw, &cmd,
1712 min(ucore->inlen, sizeof(cmd)),
1713 ib_uverbs_ex_create_qp_cb, NULL);
1715 if (err)
1716 return err;
1718 return 0;
1719 }
1721 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1722 const char __user *buf, int in_len, int out_len)
1723 {
1724 struct ib_uverbs_open_qp cmd;
1725 struct ib_uverbs_create_qp_resp resp;
1726 struct ib_udata udata;
1727 struct ib_uqp_object *obj;
1728 struct ib_xrcd *xrcd;
1729 struct ib_uobject *uninitialized_var(xrcd_uobj);
1730 struct ib_qp *qp;
1731 struct ib_qp_open_attr attr;
1732 int ret;
1733 struct ib_device *ib_dev;
1735 if (out_len < sizeof resp)
1736 return -ENOSPC;
1738 if (copy_from_user(&cmd, buf, sizeof cmd))
1739 return -EFAULT;
1741 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1742 u64_to_user_ptr(cmd.response) + sizeof(resp),
1743 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1744 out_len - sizeof(resp));
1746 obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, file,
1747 &ib_dev);
1748 if (IS_ERR(obj))
1749 return PTR_ERR(obj);
1751 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, file);
1752 if (IS_ERR(xrcd_uobj)) {
1753 ret = -EINVAL;
1754 goto err_put;
1755 }
1757 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1758 if (!xrcd) {
1759 ret = -EINVAL;
1760 goto err_xrcd;
1761 }
1763 attr.event_handler = ib_uverbs_qp_event_handler;
1764 attr.qp_context = file;
1765 attr.qp_num = cmd.qpn;
1766 attr.qp_type = cmd.qp_type;
1768 obj->uevent.events_reported = 0;
1769 INIT_LIST_HEAD(&obj->uevent.event_list);
1770 INIT_LIST_HEAD(&obj->mcast_list);
1772 qp = ib_open_qp(xrcd, &attr);
1773 if (IS_ERR(qp)) {
1774 ret = PTR_ERR(qp);
1775 goto err_xrcd;
1776 }
1778 obj->uevent.uobject.object = qp;
1779 obj->uevent.uobject.user_handle = cmd.user_handle;
1781 memset(&resp, 0, sizeof resp);
1782 resp.qpn = qp->qp_num;
1783 resp.qp_handle = obj->uevent.uobject.id;
1785 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
1786 ret = -EFAULT;
1787 goto err_destroy;
1788 }
1790 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1791 atomic_inc(&obj->uxrcd->refcnt);
1792 qp->uobject = &obj->uevent.uobject;
1793 uobj_put_read(xrcd_uobj);
1795 return uobj_alloc_commit(&obj->uevent.uobject, in_len);
1797 err_destroy:
1798 ib_destroy_qp(qp);
1799 err_xrcd:
1800 uobj_put_read(xrcd_uobj);
1801 err_put:
1802 uobj_alloc_abort(&obj->uevent.uobject);
1803 return ret;
1804 }
1806 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1807 struct rdma_ah_attr *rdma_attr)
1808 {
1809 const struct ib_global_route *grh;
1811 uverb_attr->dlid = rdma_ah_get_dlid(rdma_attr);
1812 uverb_attr->sl = rdma_ah_get_sl(rdma_attr);
1813 uverb_attr->src_path_bits = rdma_ah_get_path_bits(rdma_attr);
1814 uverb_attr->static_rate = rdma_ah_get_static_rate(rdma_attr);
1815 uverb_attr->is_global = !!(rdma_ah_get_ah_flags(rdma_attr) &
1816 IB_AH_GRH);
1817 if (uverb_attr->is_global) {
1818 grh = rdma_ah_read_grh(rdma_attr);
1819 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1820 uverb_attr->flow_label = grh->flow_label;
1821 uverb_attr->sgid_index = grh->sgid_index;
1822 uverb_attr->hop_limit = grh->hop_limit;
1823 uverb_attr->traffic_class = grh->traffic_class;
1824 }
1825 uverb_attr->port_num = rdma_ah_get_port_num(rdma_attr);
1826 }
1828 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1829 const char __user *buf, int in_len,
1830 int out_len)
1831 {
1832 struct ib_uverbs_query_qp cmd;
1833 struct ib_uverbs_query_qp_resp resp;
1834 struct ib_qp *qp;
1835 struct ib_qp_attr *attr;
1836 struct ib_qp_init_attr *init_attr;
1837 int ret;
1839 if (copy_from_user(&cmd, buf, sizeof cmd))
1840 return -EFAULT;
1842 attr = kmalloc(sizeof *attr, GFP_KERNEL);
1843 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1844 if (!attr || !init_attr) {
1845 ret = -ENOMEM;
1846 goto out;
1847 }
1849 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file);
1850 if (!qp) {
1851 ret = -EINVAL;
1852 goto out;
1853 }
1855 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1857 uobj_put_obj_read(qp);
1859 if (ret)
1860 goto out;
1862 memset(&resp, 0, sizeof resp);
1864 resp.qp_state = attr->qp_state;
1865 resp.cur_qp_state = attr->cur_qp_state;
1866 resp.path_mtu = attr->path_mtu;
1867 resp.path_mig_state = attr->path_mig_state;
1868 resp.qkey = attr->qkey;
1869 resp.rq_psn = attr->rq_psn;
1870 resp.sq_psn = attr->sq_psn;
1871 resp.dest_qp_num = attr->dest_qp_num;
1872 resp.qp_access_flags = attr->qp_access_flags;
1873 resp.pkey_index = attr->pkey_index;
1874 resp.alt_pkey_index = attr->alt_pkey_index;
1875 resp.sq_draining = attr->sq_draining;
1876 resp.max_rd_atomic = attr->max_rd_atomic;
1877 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
1878 resp.min_rnr_timer = attr->min_rnr_timer;
1879 resp.port_num = attr->port_num;
1880 resp.timeout = attr->timeout;
1881 resp.retry_cnt = attr->retry_cnt;
1882 resp.rnr_retry = attr->rnr_retry;
1883 resp.alt_port_num = attr->alt_port_num;
1884 resp.alt_timeout = attr->alt_timeout;
1886 copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1887 copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1889 resp.max_send_wr = init_attr->cap.max_send_wr;
1890 resp.max_recv_wr = init_attr->cap.max_recv_wr;
1891 resp.max_send_sge = init_attr->cap.max_send_sge;
1892 resp.max_recv_sge = init_attr->cap.max_recv_sge;
1893 resp.max_inline_data = init_attr->cap.max_inline_data;
1894 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1896 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1897 ret = -EFAULT;
1899 out:
1900 kfree(attr);
1901 kfree(init_attr);
1903 return ret ? ret : in_len;
1904 }
1906 /* Remove ignored fields set in the attribute mask */
1907 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1908 {
1909 switch (qp_type) {
1910 case IB_QPT_XRC_INI:
1911 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1912 case IB_QPT_XRC_TGT:
1913 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1914 IB_QP_RNR_RETRY);
1915 default:
1916 return mask;
1917 }
1918 }
1920 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1921 struct rdma_ah_attr *rdma_attr,
1922 struct ib_uverbs_qp_dest *uverb_attr)
1923 {
1924 rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1925 if (uverb_attr->is_global) {
1926 rdma_ah_set_grh(rdma_attr, NULL,
1927 uverb_attr->flow_label,
1928 uverb_attr->sgid_index,
1929 uverb_attr->hop_limit,
1930 uverb_attr->traffic_class);
1931 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1932 } else {
1933 rdma_ah_set_ah_flags(rdma_attr, 0);
1934 }
1935 rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1936 rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1937 rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1938 rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1939 rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1940 rdma_ah_set_make_grd(rdma_attr, false);
1941 }
1943 static int modify_qp(struct ib_uverbs_file *file,
1944 struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
1945 {
1946 struct ib_qp_attr *attr;
1947 struct ib_qp *qp;
1948 int ret;
1950 attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1951 if (!attr)
1952 return -ENOMEM;
1954 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, file);
1955 if (!qp) {
1956 ret = -EINVAL;
1957 goto out;
1958 }
1960 if ((cmd->base.attr_mask & IB_QP_PORT) &&
1961 !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1962 ret = -EINVAL;
1963 goto release_qp;
1964 }
1966 if ((cmd->base.attr_mask & IB_QP_AV)) {
1967 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1968 ret = -EINVAL;
1969 goto release_qp;
1970 }
1972 if (cmd->base.attr_mask & IB_QP_STATE &&
1973 cmd->base.qp_state == IB_QPS_RTR) {
1974 /* We are in INIT->RTR TRANSITION (if we are not,
1975 * this transition will be rejected in subsequent checks).
1976 * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1977 * but the IB_QP_STATE flag is required.
1978 *
1979 * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1980 * when IB_QP_AV is set, has required inclusion of a valid
1981 * port number in the primary AV. (AVs are created and handled
1982 * differently for infiniband and ethernet (RoCE) ports).
1983 *
1984 * Check the port number included in the primary AV against
1985 * the port number in the qp struct, which was set (and saved)
1986 * in the RST->INIT transition.
1987 */
1988 if (cmd->base.dest.port_num != qp->real_qp->port) {
1989 ret = -EINVAL;
1990 goto release_qp;
1991 }
1992 } else {
1993 /* We are in SQD->SQD. (If we are not, this transition will
1994 * be rejected later in the verbs layer checks).
1995 * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1996 * together in the SQD->SQD transition.
1997 *
1998 * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1999 * verbs layer driver does not track primary port changes
2000 * resulting from path migration. Thus, in SQD, if the primary
2001 * AV is modified, the primary port should also be modified).
2002 *
2003 * Note that in this transition, the IB_QP_STATE flag
2004 * is not allowed.
2005 */
2006 if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
2007 == (IB_QP_AV | IB_QP_PORT)) &&
2008 cmd->base.port_num != cmd->base.dest.port_num) {
2009 ret = -EINVAL;
2010 goto release_qp;
2011 }
2012 if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
2013 == IB_QP_AV) {
2014 cmd->base.attr_mask |= IB_QP_PORT;
2015 cmd->base.port_num = cmd->base.dest.port_num;
2016 }
2017 }
2018 }
2020 if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
2021 (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
2022 !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
2023 cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
2024 ret = -EINVAL;
2025 goto release_qp;
2026 }
2028 if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
2029 cmd->base.cur_qp_state > IB_QPS_ERR) ||
2030 (cmd->base.attr_mask & IB_QP_STATE &&
2031 cmd->base.qp_state > IB_QPS_ERR)) {
2032 ret = -EINVAL;
2033 goto release_qp;
2034 }
2036 if (cmd->base.attr_mask & IB_QP_STATE)
2037 attr->qp_state = cmd->base.qp_state;
2038 if (cmd->base.attr_mask & IB_QP_CUR_STATE)
2039 attr->cur_qp_state = cmd->base.cur_qp_state;
2040 if (cmd->base.attr_mask & IB_QP_PATH_MTU)
2041 attr->path_mtu = cmd->base.path_mtu;
2042 if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
2043 attr->path_mig_state = cmd->base.path_mig_state;
2044 if (cmd->base.attr_mask & IB_QP_QKEY)
2045 attr->qkey = cmd->base.qkey;
2046 if (cmd->base.attr_mask & IB_QP_RQ_PSN)
2047 attr->rq_psn = cmd->base.rq_psn;
2048 if (cmd->base.attr_mask & IB_QP_SQ_PSN)
2049 attr->sq_psn = cmd->base.sq_psn;
2050 if (cmd->base.attr_mask & IB_QP_DEST_QPN)
2051 attr->dest_qp_num = cmd->base.dest_qp_num;
2052 if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
2053 attr->qp_access_flags = cmd->base.qp_access_flags;
2054 if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
2055 attr->pkey_index = cmd->base.pkey_index;
2056 if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
2057 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
2058 if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
2059 attr->max_rd_atomic = cmd->base.max_rd_atomic;
2060 if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
2061 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
2062 if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
2063 attr->min_rnr_timer = cmd->base.min_rnr_timer;
2064 if (cmd->base.attr_mask & IB_QP_PORT)
2065 attr->port_num = cmd->base.port_num;
2066 if (cmd->base.attr_mask & IB_QP_TIMEOUT)
2067 attr->timeout = cmd->base.timeout;
2068 if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
2069 attr->retry_cnt = cmd->base.retry_cnt;
2070 if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
2071 attr->rnr_retry = cmd->base.rnr_retry;
2072 if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
2073 attr->alt_port_num = cmd->base.alt_port_num;
2074 attr->alt_timeout = cmd->base.alt_timeout;
2075 attr->alt_pkey_index = cmd->base.alt_pkey_index;
2076 }
2077 if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
2078 attr->rate_limit = cmd->rate_limit;
2080 if (cmd->base.attr_mask & IB_QP_AV)
2081 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
2082 &cmd->base.dest);
2084 if (cmd->base.attr_mask & IB_QP_ALT_PATH)
2085 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
2086 &cmd->base.alt_dest);
2088 ret = ib_modify_qp_with_udata(qp, attr,
2089 modify_qp_mask(qp->qp_type,
2090 cmd->base.attr_mask),
2091 udata);
2093 release_qp:
2094 uobj_put_obj_read(qp);
2095 out:
2096 kfree(attr);
2098 return ret;
2099 }
2101 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2102 const char __user *buf, int in_len,
2103 int out_len)
2104 {
2105 struct ib_uverbs_ex_modify_qp cmd = {};
2106 struct ib_udata udata;
2107 int ret;
2109 if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2110 return -EFAULT;
2112 if (cmd.base.attr_mask &
2113 ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2114 return -EOPNOTSUPP;
2116 ib_uverbs_init_udata(&udata, buf + sizeof(cmd.base), NULL,
2117 in_len - sizeof(cmd.base) - sizeof(struct ib_uverbs_cmd_hdr),
2118 out_len);
2120 ret = modify_qp(file, &cmd, &udata);
2121 if (ret)
2122 return ret;
2124 return in_len;
2125 }
2127 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2128 struct ib_udata *ucore,
2129 struct ib_udata *uhw)
2130 {
2131 struct ib_uverbs_ex_modify_qp cmd = {};
2132 int ret;
2134 /*
2135 * Last bit is reserved for extending the attr_mask by
2136 * using another field.
2137 */
2138 BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2140 if (ucore->inlen < sizeof(cmd.base))
2141 return -EINVAL;
2143 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2144 if (ret)
2145 return ret;
2147 if (cmd.base.attr_mask &
2148 ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2149 return -EOPNOTSUPP;
2151 if (ucore->inlen > sizeof(cmd)) {
2152 if (!ib_is_udata_cleared(ucore, sizeof(cmd),
2153 ucore->inlen - sizeof(cmd)))
2154 return -EOPNOTSUPP;
2155 }
2157 ret = modify_qp(file, &cmd, uhw);
2159 return ret;
2160 }
2162 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2163 const char __user *buf, int in_len,
2164 int out_len)
2165 {
2166 struct ib_uverbs_destroy_qp cmd;
2167 struct ib_uverbs_destroy_qp_resp resp;
2168 struct ib_uobject *uobj;
2169 struct ib_uqp_object *obj;
2171 if (copy_from_user(&cmd, buf, sizeof cmd))
2172 return -EFAULT;
2174 uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, file);
2175 if (IS_ERR(uobj))
2176 return PTR_ERR(uobj);
2178 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2179 memset(&resp, 0, sizeof(resp));
2180 resp.events_reported = obj->uevent.events_reported;
2182 uobj_put_destroy(uobj);
2184 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2185 return -EFAULT;
2187 return in_len;
2188 }
2190 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2191 {
2192 if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2193 sizeof (struct ib_sge))
2194 return NULL;
2196 return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2197 num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2198 }
2200 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2201 const char __user *buf, int in_len,
2202 int out_len)
2203 {
2204 struct ib_uverbs_post_send cmd;
2205 struct ib_uverbs_post_send_resp resp;
2206 struct ib_uverbs_send_wr *user_wr;
2207 struct ib_send_wr *wr = NULL, *last, *next;
2208 const struct ib_send_wr *bad_wr;
2209 struct ib_qp *qp;
2210 int i, sg_ind;
2211 int is_ud;
2212 ssize_t ret = -EINVAL;
2213 size_t next_size;
2215 if (copy_from_user(&cmd, buf, sizeof cmd))
2216 return -EFAULT;
2218 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2219 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2220 return -EINVAL;
2222 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2223 return -EINVAL;
2225 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2226 if (!user_wr)
2227 return -ENOMEM;
2229 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file);
2230 if (!qp)
2231 goto out;
2233 is_ud = qp->qp_type == IB_QPT_UD;
2234 sg_ind = 0;
2235 last = NULL;
2236 for (i = 0; i < cmd.wr_count; ++i) {
2237 if (copy_from_user(user_wr,
2238 buf + sizeof cmd + i * cmd.wqe_size,
2239 cmd.wqe_size)) {
2240 ret = -EFAULT;
2241 goto out_put;
2242 }
2244 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2245 ret = -EINVAL;
2246 goto out_put;
2247 }
2249 if (is_ud) {
2250 struct ib_ud_wr *ud;
2252 if (user_wr->opcode != IB_WR_SEND &&
2253 user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2254 ret = -EINVAL;
2255 goto out_put;
2256 }
2258 next_size = sizeof(*ud);
2259 ud = alloc_wr(next_size, user_wr->num_sge);
2260 if (!ud) {
2261 ret = -ENOMEM;
2262 goto out_put;
2263 }
2265 ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2266 user_wr->wr.ud.ah, file);
2267 if (!ud->ah) {
2268 kfree(ud);
2269 ret = -EINVAL;
2270 goto out_put;
2271 }
2272 ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2273 ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2275 next = &ud->wr;
2276 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2277 user_wr->opcode == IB_WR_RDMA_WRITE ||
2278 user_wr->opcode == IB_WR_RDMA_READ) {
2279 struct ib_rdma_wr *rdma;
2281 next_size = sizeof(*rdma);
2282 rdma = alloc_wr(next_size, user_wr->num_sge);
2283 if (!rdma) {
2284 ret = -ENOMEM;
2285 goto out_put;
2286 }
2288 rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2289 rdma->rkey = user_wr->wr.rdma.rkey;
2291 next = &rdma->wr;
2292 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2293 user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2294 struct ib_atomic_wr *atomic;
2296 next_size = sizeof(*atomic);
2297 atomic = alloc_wr(next_size, user_wr->num_sge);
2298 if (!atomic) {
2299 ret = -ENOMEM;
2300 goto out_put;
2301 }
2303 atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2304 atomic->compare_add = user_wr->wr.atomic.compare_add;
2305 atomic->swap = user_wr->wr.atomic.swap;
2306 atomic->rkey = user_wr->wr.atomic.rkey;
2308 next = &atomic->wr;
2309 } else if (user_wr->opcode == IB_WR_SEND ||
2310 user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2311 user_wr->opcode == IB_WR_SEND_WITH_INV) {
2312 next_size = sizeof(*next);
2313 next = alloc_wr(next_size, user_wr->num_sge);
2314 if (!next) {
2315 ret = -ENOMEM;
2316 goto out_put;
2317 }
2318 } else {
2319 ret = -EINVAL;
2320 goto out_put;
2321 }
2323 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2324 user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2325 next->ex.imm_data =
2326 (__be32 __force) user_wr->ex.imm_data;
2327 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2328 next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2329 }
2331 if (!last)
2332 wr = next;
2333 else
2334 last->next = next;
2335 last = next;
2337 next->next = NULL;
2338 next->wr_id = user_wr->wr_id;
2339 next->num_sge = user_wr->num_sge;
2340 next->opcode = user_wr->opcode;
2341 next->send_flags = user_wr->send_flags;
2343 if (next->num_sge) {
2344 next->sg_list = (void *) next +
2345 ALIGN(next_size, sizeof(struct ib_sge));
2346 if (copy_from_user(next->sg_list,
2347 buf + sizeof cmd +
2348 cmd.wr_count * cmd.wqe_size +
2349 sg_ind * sizeof (struct ib_sge),
2350 next->num_sge * sizeof (struct ib_sge))) {
2351 ret = -EFAULT;
2352 goto out_put;
2353 }
2354 sg_ind += next->num_sge;
2355 } else
2356 next->sg_list = NULL;
2357 }
2359 resp.bad_wr = 0;
2360 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2361 if (ret)
2362 for (next = wr; next; next = next->next) {
2363 ++resp.bad_wr;
2364 if (next == bad_wr)
2365 break;
2366 }
2368 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2369 ret = -EFAULT;
2371 out_put:
2372 uobj_put_obj_read(qp);
2374 while (wr) {
2375 if (is_ud && ud_wr(wr)->ah)
2376 uobj_put_obj_read(ud_wr(wr)->ah);
2377 next = wr->next;
2378 kfree(wr);
2379 wr = next;
2380 }
2382 out:
2383 kfree(user_wr);
2385 return ret ? ret : in_len;
2386 }
2388 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2389 int in_len,
2390 u32 wr_count,
2391 u32 sge_count,
2392 u32 wqe_size)
2393 {
2394 struct ib_uverbs_recv_wr *user_wr;
2395 struct ib_recv_wr *wr = NULL, *last, *next;
2396 int sg_ind;
2397 int i;
2398 int ret;
2400 if (in_len < wqe_size * wr_count +
2401 sge_count * sizeof (struct ib_uverbs_sge))
2402 return ERR_PTR(-EINVAL);
2404 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2405 return ERR_PTR(-EINVAL);
2407 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2408 if (!user_wr)
2409 return ERR_PTR(-ENOMEM);
2411 sg_ind = 0;
2412 last = NULL;
2413 for (i = 0; i < wr_count; ++i) {
2414 if (copy_from_user(user_wr, buf + i * wqe_size,
2415 wqe_size)) {
2416 ret = -EFAULT;
2417 goto err;
2418 }
2420 if (user_wr->num_sge + sg_ind > sge_count) {
2421 ret = -EINVAL;
2422 goto err;
2423 }
2425 if (user_wr->num_sge >=
2426 (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2427 sizeof (struct ib_sge)) {
2428 ret = -EINVAL;
2429 goto err;
2430 }
2432 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2433 user_wr->num_sge * sizeof (struct ib_sge),
2434 GFP_KERNEL);
2435 if (!next) {
2436 ret = -ENOMEM;
2437 goto err;
2438 }
2440 if (!last)
2441 wr = next;
2442 else
2443 last->next = next;
2444 last = next;
2446 next->next = NULL;
2447 next->wr_id = user_wr->wr_id;
2448 next->num_sge = user_wr->num_sge;
2450 if (next->num_sge) {
2451 next->sg_list = (void *) next +
2452 ALIGN(sizeof *next, sizeof (struct ib_sge));
2453 if (copy_from_user(next->sg_list,
2454 buf + wr_count * wqe_size +
2455 sg_ind * sizeof (struct ib_sge),
2456 next->num_sge * sizeof (struct ib_sge))) {
2457 ret = -EFAULT;
2458 goto err;
2459 }
2460 sg_ind += next->num_sge;
2461 } else
2462 next->sg_list = NULL;
2463 }
2465 kfree(user_wr);
2466 return wr;
2468 err:
2469 kfree(user_wr);
2471 while (wr) {
2472 next = wr->next;
2473 kfree(wr);
2474 wr = next;
2475 }
2477 return ERR_PTR(ret);
2478 }
2480 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2481 const char __user *buf, int in_len,
2482 int out_len)
2483 {
2484 struct ib_uverbs_post_recv cmd;
2485 struct ib_uverbs_post_recv_resp resp;
2486 struct ib_recv_wr *wr, *next;
2487 const struct ib_recv_wr *bad_wr;
2488 struct ib_qp *qp;
2489 ssize_t ret = -EINVAL;
2491 if (copy_from_user(&cmd, buf, sizeof cmd))
2492 return -EFAULT;
2494 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2495 in_len - sizeof cmd, cmd.wr_count,
2496 cmd.sge_count, cmd.wqe_size);
2497 if (IS_ERR(wr))
2498 return PTR_ERR(wr);
2500 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file);
2501 if (!qp)
2502 goto out;
2504 resp.bad_wr = 0;
2505 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2507 uobj_put_obj_read(qp);
2508 if (ret) {
2509 for (next = wr; next; next = next->next) {
2510 ++resp.bad_wr;
2511 if (next == bad_wr)
2512 break;
2513 }
2514 }
2516 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2517 ret = -EFAULT;
2519 out:
2520 while (wr) {
2521 next = wr->next;
2522 kfree(wr);
2523 wr = next;
2524 }
2526 return ret ? ret : in_len;
2527 }
2529 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2530 const char __user *buf, int in_len,
2531 int out_len)
2532 {
2533 struct ib_uverbs_post_srq_recv cmd;
2534 struct ib_uverbs_post_srq_recv_resp resp;
2535 struct ib_recv_wr *wr, *next;
2536 const struct ib_recv_wr *bad_wr;
2537 struct ib_srq *srq;
2538 ssize_t ret = -EINVAL;
2540 if (copy_from_user(&cmd, buf, sizeof cmd))
2541 return -EFAULT;
2543 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2544 in_len - sizeof cmd, cmd.wr_count,
2545 cmd.sge_count, cmd.wqe_size);
2546 if (IS_ERR(wr))
2547 return PTR_ERR(wr);
2549 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, file);
2550 if (!srq)
2551 goto out;
2553 resp.bad_wr = 0;
2554 ret = srq->device->post_srq_recv ?
2555 srq->device->post_srq_recv(srq, wr, &bad_wr) : -EOPNOTSUPP;
2557 uobj_put_obj_read(srq);
2559 if (ret)
2560 for (next = wr; next; next = next->next) {
2561 ++resp.bad_wr;
2562 if (next == bad_wr)
2563 break;
2564 }
2566 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2567 ret = -EFAULT;
2569 out:
2570 while (wr) {
2571 next = wr->next;
2572 kfree(wr);
2573 wr = next;
2574 }
2576 return ret ? ret : in_len;
2577 }
2579 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2580 const char __user *buf, int in_len,
2581 int out_len)
2582 {
2583 struct ib_uverbs_create_ah cmd;
2584 struct ib_uverbs_create_ah_resp resp;
2585 struct ib_uobject *uobj;
2586 struct ib_pd *pd;
2587 struct ib_ah *ah;
2588 struct rdma_ah_attr attr = {};
2589 int ret;
2590 struct ib_udata udata;
2591 struct ib_device *ib_dev;
2593 if (out_len < sizeof resp)
2594 return -ENOSPC;
2596 if (copy_from_user(&cmd, buf, sizeof cmd))
2597 return -EFAULT;
2599 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
2600 u64_to_user_ptr(cmd.response) + sizeof(resp),
2601 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
2602 out_len - sizeof(resp));
2604 uobj = uobj_alloc(UVERBS_OBJECT_AH, file, &ib_dev);
2605 if (IS_ERR(uobj))
2606 return PTR_ERR(uobj);
2608 if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2609 ret = -EINVAL;
2610 goto err;
2611 }
2613 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file);
2614 if (!pd) {
2615 ret = -EINVAL;
2616 goto err;
2617 }
2619 attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2620 rdma_ah_set_make_grd(&attr, false);
2621 rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2622 rdma_ah_set_sl(&attr, cmd.attr.sl);
2623 rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2624 rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2625 rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2627 if (cmd.attr.is_global) {
2628 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2629 cmd.attr.grh.sgid_index,
2630 cmd.attr.grh.hop_limit,
2631 cmd.attr.grh.traffic_class);
2632 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2633 } else {
2634 rdma_ah_set_ah_flags(&attr, 0);
2635 }
2637 ah = rdma_create_user_ah(pd, &attr, &udata);
2638 if (IS_ERR(ah)) {
2639 ret = PTR_ERR(ah);
2640 goto err_put;
2641 }
2643 ah->uobject = uobj;
2644 uobj->user_handle = cmd.user_handle;
2645 uobj->object = ah;
2647 resp.ah_handle = uobj->id;
2649 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
2650 ret = -EFAULT;
2651 goto err_copy;
2652 }
2654 uobj_put_obj_read(pd);
2655 return uobj_alloc_commit(uobj, in_len);
2657 err_copy:
2658 rdma_destroy_ah(ah);
2660 err_put:
2661 uobj_put_obj_read(pd);
2663 err:
2664 uobj_alloc_abort(uobj);
2665 return ret;
2666 }
2668 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2669 const char __user *buf, int in_len, int out_len)
2670 {
2671 struct ib_uverbs_destroy_ah cmd;
2673 if (copy_from_user(&cmd, buf, sizeof cmd))
2674 return -EFAULT;
2676 return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, file,
2677 in_len);
2678 }
2680 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2681 const char __user *buf, int in_len,
2682 int out_len)
2683 {
2684 struct ib_uverbs_attach_mcast cmd;
2685 struct ib_qp *qp;
2686 struct ib_uqp_object *obj;
2687 struct ib_uverbs_mcast_entry *mcast;
2688 int ret;
2690 if (copy_from_user(&cmd, buf, sizeof cmd))
2691 return -EFAULT;
2693 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file);
2694 if (!qp)
2695 return -EINVAL;
2697 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2699 mutex_lock(&obj->mcast_lock);
2700 list_for_each_entry(mcast, &obj->mcast_list, list)
2701 if (cmd.mlid == mcast->lid &&
2702 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2703 ret = 0;
2704 goto out_put;
2705 }
2707 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2708 if (!mcast) {
2709 ret = -ENOMEM;
2710 goto out_put;
2711 }
2713 mcast->lid = cmd.mlid;
2714 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2716 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2717 if (!ret)
2718 list_add_tail(&mcast->list, &obj->mcast_list);
2719 else
2720 kfree(mcast);
2722 out_put:
2723 mutex_unlock(&obj->mcast_lock);
2724 uobj_put_obj_read(qp);
2726 return ret ? ret : in_len;
2727 }
2729 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2730 const char __user *buf, int in_len,
2731 int out_len)
2732 {
2733 struct ib_uverbs_detach_mcast cmd;
2734 struct ib_uqp_object *obj;
2735 struct ib_qp *qp;
2736 struct ib_uverbs_mcast_entry *mcast;
2737 int ret = -EINVAL;
2738 bool found = false;
2740 if (copy_from_user(&cmd, buf, sizeof cmd))
2741 return -EFAULT;
2743 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file);
2744 if (!qp)
2745 return -EINVAL;
2747 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2748 mutex_lock(&obj->mcast_lock);
2750 list_for_each_entry(mcast, &obj->mcast_list, list)
2751 if (cmd.mlid == mcast->lid &&
2752 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2753 list_del(&mcast->list);
2754 kfree(mcast);
2755 found = true;
2756 break;
2757 }
2759 if (!found) {
2760 ret = -EINVAL;
2761 goto out_put;
2762 }
2764 ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2766 out_put:
2767 mutex_unlock(&obj->mcast_lock);
2768 uobj_put_obj_read(qp);
2769 return ret ? ret : in_len;
2770 }
2772 struct ib_uflow_resources {
2773 size_t max;
2774 size_t num;
2775 size_t collection_num;
2776 size_t counters_num;
2777 struct ib_counters **counters;
2778 struct ib_flow_action **collection;
2779 };
2781 static struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2782 {
2783 struct ib_uflow_resources *resources;
2785 resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2787 if (!resources)
2788 return NULL;
2790 if (!num_specs)
2791 goto out;
2793 resources->counters =
2794 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2795 resources->collection =
2796 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2798 if (!resources->counters || !resources->collection)
2799 goto err;
2801 out:
2802 resources->max = num_specs;
2803 return resources;
2805 err:
2806 kfree(resources->counters);
2807 kfree(resources);
2809 return NULL;
2810 }
2812 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2813 {
2814 unsigned int i;
2816 if (!uflow_res)
2817 return;
2819 for (i = 0; i < uflow_res->collection_num; i++)
2820 atomic_dec(&uflow_res->collection[i]->usecnt);
2822 for (i = 0; i < uflow_res->counters_num; i++)
2823 atomic_dec(&uflow_res->counters[i]->usecnt);
2825 kfree(uflow_res->collection);
2826 kfree(uflow_res->counters);
2827 kfree(uflow_res);
2828 }
2830 static void flow_resources_add(struct ib_uflow_resources *uflow_res,
2831 enum ib_flow_spec_type type,
2832 void *ibobj)
2833 {
2834 WARN_ON(uflow_res->num >= uflow_res->max);
2836 switch (type) {
2837 case IB_FLOW_SPEC_ACTION_HANDLE:
2838 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2839 uflow_res->collection[uflow_res->collection_num++] =
2840 (struct ib_flow_action *)ibobj;
2841 break;
2842 case IB_FLOW_SPEC_ACTION_COUNT:
2843 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2844 uflow_res->counters[uflow_res->counters_num++] =
2845 (struct ib_counters *)ibobj;
2846 break;
2847 default:
2848 WARN_ON(1);
2849 }
2851 uflow_res->num++;
2852 }
2854 static int kern_spec_to_ib_spec_action(struct ib_uverbs_file *ufile,
2855 struct ib_uverbs_flow_spec *kern_spec,
2856 union ib_flow_spec *ib_spec,
2857 struct ib_uflow_resources *uflow_res)
2858 {
2859 ib_spec->type = kern_spec->type;
2860 switch (ib_spec->type) {
2861 case IB_FLOW_SPEC_ACTION_TAG:
2862 if (kern_spec->flow_tag.size !=
2863 sizeof(struct ib_uverbs_flow_spec_action_tag))
2864 return -EINVAL;
2866 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2867 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2868 break;
2869 case IB_FLOW_SPEC_ACTION_DROP:
2870 if (kern_spec->drop.size !=
2871 sizeof(struct ib_uverbs_flow_spec_action_drop))
2872 return -EINVAL;
2874 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2875 break;
2876 case IB_FLOW_SPEC_ACTION_HANDLE:
2877 if (kern_spec->action.size !=
2878 sizeof(struct ib_uverbs_flow_spec_action_handle))
2879 return -EOPNOTSUPP;
2880 ib_spec->action.act = uobj_get_obj_read(flow_action,
2881 UVERBS_OBJECT_FLOW_ACTION,
2882 kern_spec->action.handle,
2883 ufile);
2884 if (!ib_spec->action.act)
2885 return -EINVAL;
2886 ib_spec->action.size =
2887 sizeof(struct ib_flow_spec_action_handle);
2888 flow_resources_add(uflow_res,
2889 IB_FLOW_SPEC_ACTION_HANDLE,
2890 ib_spec->action.act);
2891 uobj_put_obj_read(ib_spec->action.act);
2892 break;
2893 case IB_FLOW_SPEC_ACTION_COUNT:
2894 if (kern_spec->flow_count.size !=
2895 sizeof(struct ib_uverbs_flow_spec_action_count))
2896 return -EINVAL;
2897 ib_spec->flow_count.counters =
2898 uobj_get_obj_read(counters,
2899 UVERBS_OBJECT_COUNTERS,
2900 kern_spec->flow_count.handle,
2901 ufile);
2902 if (!ib_spec->flow_count.counters)
2903 return -EINVAL;
2904 ib_spec->flow_count.size =
2905 sizeof(struct ib_flow_spec_action_count);
2906 flow_resources_add(uflow_res,
2907 IB_FLOW_SPEC_ACTION_COUNT,
2908 ib_spec->flow_count.counters);
2909 uobj_put_obj_read(ib_spec->flow_count.counters);
2910 break;
2911 default:
2912 return -EINVAL;
2913 }
2914 return 0;
2915 }
2917 static size_t kern_spec_filter_sz(const struct ib_uverbs_flow_spec_hdr *spec)
2918 {
2919 /* Returns user space filter size, includes padding */
2920 return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2921 }
2923 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2924 u16 ib_real_filter_sz)
2925 {
2926 /*
2927 * User space filter structures must be 64 bit aligned, otherwise this
2928 * may pass, but we won't handle additional new attributes.
2929 */
2931 if (kern_filter_size > ib_real_filter_sz) {
2932 if (memchr_inv(kern_spec_filter +
2933 ib_real_filter_sz, 0,
2934 kern_filter_size - ib_real_filter_sz))
2935 return -EINVAL;
2936 return ib_real_filter_sz;
2937 }
2938 return kern_filter_size;
2939 }
2941 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2942 const void *kern_spec_mask,
2943 const void *kern_spec_val,
2944 size_t kern_filter_sz,
2945 union ib_flow_spec *ib_spec)
2946 {
2947 ssize_t actual_filter_sz;
2948 ssize_t ib_filter_sz;
2950 /* User flow spec size must be aligned to 4 bytes */
2951 if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2952 return -EINVAL;
2954 ib_spec->type = type;
2956 if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2957 return -EINVAL;
2959 switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2960 case IB_FLOW_SPEC_ETH:
2961 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2962 actual_filter_sz = spec_filter_size(kern_spec_mask,
2963 kern_filter_sz,
2964 ib_filter_sz);
2965 if (actual_filter_sz <= 0)
2966 return -EINVAL;
2967 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2968 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2969 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2970 break;
2971 case IB_FLOW_SPEC_IPV4:
2972 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2973 actual_filter_sz = spec_filter_size(kern_spec_mask,
2974 kern_filter_sz,
2975 ib_filter_sz);
2976 if (actual_filter_sz <= 0)
2977 return -EINVAL;
2978 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2979 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2980 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2981 break;
2982 case IB_FLOW_SPEC_IPV6:
2983 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2984 actual_filter_sz = spec_filter_size(kern_spec_mask,
2985 kern_filter_sz,
2986 ib_filter_sz);
2987 if (actual_filter_sz <= 0)
2988 return -EINVAL;
2989 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2990 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2991 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2993 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2994 (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2995 return -EINVAL;
2996 break;
2997 case IB_FLOW_SPEC_TCP:
2998 case IB_FLOW_SPEC_UDP:
2999 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
3000 actual_filter_sz = spec_filter_size(kern_spec_mask,
3001 kern_filter_sz,
3002 ib_filter_sz);
3003 if (actual_filter_sz <= 0)
3004 return -EINVAL;
3005 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
3006 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
3007 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
3008 break;
3009 case IB_FLOW_SPEC_VXLAN_TUNNEL:
3010 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
3011 actual_filter_sz = spec_filter_size(kern_spec_mask,
3012 kern_filter_sz,
3013 ib_filter_sz);
3014 if (actual_filter_sz <= 0)
3015 return -EINVAL;
3016 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
3017 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
3018 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
3020 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
3021 (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
3022 return -EINVAL;
3023 break;
3024 case IB_FLOW_SPEC_ESP:
3025 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
3026 actual_filter_sz = spec_filter_size(kern_spec_mask,
3027 kern_filter_sz,
3028 ib_filter_sz);
3029 if (actual_filter_sz <= 0)
3030 return -EINVAL;
3031 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
3032 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
3033 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
3034 break;
3035 case IB_FLOW_SPEC_GRE:
3036 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
3037 actual_filter_sz = spec_filter_size(kern_spec_mask,
3038 kern_filter_sz,
3039 ib_filter_sz);
3040 if (actual_filter_sz <= 0)
3041 return -EINVAL;
3042 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
3043 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
3044 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
3045 break;
3046 case IB_FLOW_SPEC_MPLS:
3047 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
3048 actual_filter_sz = spec_filter_size(kern_spec_mask,
3049 kern_filter_sz,
3050 ib_filter_sz);
3051 if (actual_filter_sz <= 0)
3052 return -EINVAL;
3053 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
3054 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
3055 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
3056 break;
3057 default:
3058 return -EINVAL;
3059 }
3060 return 0;
3061 }
3063 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
3064 union ib_flow_spec *ib_spec)
3065 {
3066 ssize_t kern_filter_sz;
3067 void *kern_spec_mask;
3068 void *kern_spec_val;
3070 kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
3072 kern_spec_val = (void *)kern_spec +
3073 sizeof(struct ib_uverbs_flow_spec_hdr);
3074 kern_spec_mask = kern_spec_val + kern_filter_sz;
3076 return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
3077 kern_spec_mask,
3078 kern_spec_val,
3079 kern_filter_sz, ib_spec);
3080 }
3082 static int kern_spec_to_ib_spec(struct ib_uverbs_file *ufile,
3083 struct ib_uverbs_flow_spec *kern_spec,
3084 union ib_flow_spec *ib_spec,
3085 struct ib_uflow_resources *uflow_res)
3086 {
3087 if (kern_spec->reserved)
3088 return -EINVAL;
3090 if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
3091 return kern_spec_to_ib_spec_action(ufile, kern_spec, ib_spec,
3092 uflow_res);
3093 else
3094 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
3095 }
3097 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
3098 struct ib_udata *ucore,
3099 struct ib_udata *uhw)
3100 {
3101 struct ib_uverbs_ex_create_wq cmd = {};
3102 struct ib_uverbs_ex_create_wq_resp resp = {};
3103 struct ib_uwq_object *obj;
3104 int err = 0;
3105 struct ib_cq *cq;
3106 struct ib_pd *pd;
3107 struct ib_wq *wq;
3108 struct ib_wq_init_attr wq_init_attr = {};
3109 size_t required_cmd_sz;
3110 size_t required_resp_len;
3111 struct ib_device *ib_dev;
3113 required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
3114 required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
3116 if (ucore->inlen < required_cmd_sz)
3117 return -EINVAL;
3119 if (ucore->outlen < required_resp_len)
3120 return -ENOSPC;
3122 if (ucore->inlen > sizeof(cmd) &&
3123 !ib_is_udata_cleared(ucore, sizeof(cmd),
3124 ucore->inlen - sizeof(cmd)))
3125 return -EOPNOTSUPP;
3127 err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3128 if (err)
3129 return err;
3131 if (cmd.comp_mask)
3132 return -EOPNOTSUPP;
3134 obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, file,
3135 &ib_dev);
3136 if (IS_ERR(obj))
3137 return PTR_ERR(obj);
3139 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, file);
3140 if (!pd) {
3141 err = -EINVAL;
3142 goto err_uobj;
3143 }
3145 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file);
3146 if (!cq) {
3147 err = -EINVAL;
3148 goto err_put_pd;
3149 }
3151 wq_init_attr.cq = cq;
3152 wq_init_attr.max_sge = cmd.max_sge;
3153 wq_init_attr.max_wr = cmd.max_wr;
3154 wq_init_attr.wq_context = file;
3155 wq_init_attr.wq_type = cmd.wq_type;
3156 wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
3157 if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
3158 sizeof(cmd.create_flags)))
3159 wq_init_attr.create_flags = cmd.create_flags;
3160 obj->uevent.events_reported = 0;
3161 INIT_LIST_HEAD(&obj->uevent.event_list);
3163 if (!pd->device->create_wq) {
3164 err = -EOPNOTSUPP;
3165 goto err_put_cq;
3166 }
3167 wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
3168 if (IS_ERR(wq)) {
3169 err = PTR_ERR(wq);
3170 goto err_put_cq;
3171 }
3173 wq->uobject = &obj->uevent.uobject;
3174 obj->uevent.uobject.object = wq;
3175 wq->wq_type = wq_init_attr.wq_type;
3176 wq->cq = cq;
3177 wq->pd = pd;
3178 wq->device = pd->device;
3179 wq->wq_context = wq_init_attr.wq_context;
3180 atomic_set(&wq->usecnt, 0);
3181 atomic_inc(&pd->usecnt);
3182 atomic_inc(&cq->usecnt);
3183 wq->uobject = &obj->uevent.uobject;
3184 obj->uevent.uobject.object = wq;
3186 memset(&resp, 0, sizeof(resp));
3187 resp.wq_handle = obj->uevent.uobject.id;
3188 resp.max_sge = wq_init_attr.max_sge;
3189 resp.max_wr = wq_init_attr.max_wr;
3190 resp.wqn = wq->wq_num;
3191 resp.response_length = required_resp_len;
3192 err = ib_copy_to_udata(ucore,
3193 &resp, resp.response_length);
3194 if (err)
3195 goto err_copy;
3197 uobj_put_obj_read(pd);
3198 uobj_put_obj_read(cq);
3199 return uobj_alloc_commit(&obj->uevent.uobject, 0);
3201 err_copy:
3202 ib_destroy_wq(wq);
3203 err_put_cq:
3204 uobj_put_obj_read(cq);
3205 err_put_pd:
3206 uobj_put_obj_read(pd);
3207 err_uobj:
3208 uobj_alloc_abort(&obj->uevent.uobject);
3210 return err;
3211 }
3213 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
3214 struct ib_udata *ucore,
3215 struct ib_udata *uhw)
3216 {
3217 struct ib_uverbs_ex_destroy_wq cmd = {};
3218 struct ib_uverbs_ex_destroy_wq_resp resp = {};
3219 struct ib_uobject *uobj;
3220 struct ib_uwq_object *obj;
3221 size_t required_cmd_sz;
3222 size_t required_resp_len;
3223 int ret;
3225 required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3226 required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3228 if (ucore->inlen < required_cmd_sz)
3229 return -EINVAL;
3231 if (ucore->outlen < required_resp_len)
3232 return -ENOSPC;
3234 if (ucore->inlen > sizeof(cmd) &&
3235 !ib_is_udata_cleared(ucore, sizeof(cmd),
3236 ucore->inlen - sizeof(cmd)))
3237 return -EOPNOTSUPP;
3239 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3240 if (ret)
3241 return ret;
3243 if (cmd.comp_mask)
3244 return -EOPNOTSUPP;
3246 resp.response_length = required_resp_len;
3247 uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, file);
3248 if (IS_ERR(uobj))
3249 return PTR_ERR(uobj);
3251 obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3252 resp.events_reported = obj->uevent.events_reported;
3254 uobj_put_destroy(uobj);
3256 return ib_copy_to_udata(ucore, &resp, resp.response_length);
3257 }
3259 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3260 struct ib_udata *ucore,
3261 struct ib_udata *uhw)
3262 {
3263 struct ib_uverbs_ex_modify_wq cmd = {};
3264 struct ib_wq *wq;
3265 struct ib_wq_attr wq_attr = {};
3266 size_t required_cmd_sz;
3267 int ret;
3269 required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3270 if (ucore->inlen < required_cmd_sz)
3271 return -EINVAL;
3273 if (ucore->inlen > sizeof(cmd) &&
3274 !ib_is_udata_cleared(ucore, sizeof(cmd),
3275 ucore->inlen - sizeof(cmd)))
3276 return -EOPNOTSUPP;
3278 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3279 if (ret)
3280 return ret;
3282 if (!cmd.attr_mask)
3283 return -EINVAL;
3285 if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3286 return -EINVAL;
3288 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, file);
3289 if (!wq)
3290 return -EINVAL;
3292 wq_attr.curr_wq_state = cmd.curr_wq_state;
3293 wq_attr.wq_state = cmd.wq_state;
3294 if (cmd.attr_mask & IB_WQ_FLAGS) {
3295 wq_attr.flags = cmd.flags;
3296 wq_attr.flags_mask = cmd.flags_mask;
3297 }
3298 if (!wq->device->modify_wq) {
3299 ret = -EOPNOTSUPP;
3300 goto out;
3301 }
3302 ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3303 out:
3304 uobj_put_obj_read(wq);
3305 return ret;
3306 }
3308 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3309 struct ib_udata *ucore,
3310 struct ib_udata *uhw)
3311 {
3312 struct ib_uverbs_ex_create_rwq_ind_table cmd = {};
3313 struct ib_uverbs_ex_create_rwq_ind_table_resp resp = {};
3314 struct ib_uobject *uobj;
3315 int err = 0;
3316 struct ib_rwq_ind_table_init_attr init_attr = {};
3317 struct ib_rwq_ind_table *rwq_ind_tbl;
3318 struct ib_wq **wqs = NULL;
3319 u32 *wqs_handles = NULL;
3320 struct ib_wq *wq = NULL;
3321 int i, j, num_read_wqs;
3322 u32 num_wq_handles;
3323 u32 expected_in_size;
3324 size_t required_cmd_sz_header;
3325 size_t required_resp_len;
3326 struct ib_device *ib_dev;
3328 required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3329 required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3331 if (ucore->inlen < required_cmd_sz_header)
3332 return -EINVAL;
3334 if (ucore->outlen < required_resp_len)
3335 return -ENOSPC;
3337 err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3338 if (err)
3339 return err;
3341 ucore->inbuf += required_cmd_sz_header;
3342 ucore->inlen -= required_cmd_sz_header;
3344 if (cmd.comp_mask)
3345 return -EOPNOTSUPP;
3347 if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3348 return -EINVAL;
3350 num_wq_handles = 1 << cmd.log_ind_tbl_size;
3351 expected_in_size = num_wq_handles * sizeof(__u32);
3352 if (num_wq_handles == 1)
3353 /* input size for wq handles is u64 aligned */
3354 expected_in_size += sizeof(__u32);
3356 if (ucore->inlen < expected_in_size)
3357 return -EINVAL;
3359 if (ucore->inlen > expected_in_size &&
3360 !ib_is_udata_cleared(ucore, expected_in_size,
3361 ucore->inlen - expected_in_size))
3362 return -EOPNOTSUPP;
3364 wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3365 GFP_KERNEL);
3366 if (!wqs_handles)
3367 return -ENOMEM;
3369 err = ib_copy_from_udata(wqs_handles, ucore,
3370 num_wq_handles * sizeof(__u32));
3371 if (err)
3372 goto err_free;
3374 wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3375 if (!wqs) {
3376 err = -ENOMEM;
3377 goto err_free;
3378 }
3380 for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3381 num_read_wqs++) {
3382 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3383 wqs_handles[num_read_wqs], file);
3384 if (!wq) {
3385 err = -EINVAL;
3386 goto put_wqs;
3387 }
3389 wqs[num_read_wqs] = wq;
3390 }
3392 uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, file, &ib_dev);
3393 if (IS_ERR(uobj)) {
3394 err = PTR_ERR(uobj);
3395 goto put_wqs;
3396 }
3398 init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3399 init_attr.ind_tbl = wqs;
3401 if (!ib_dev->create_rwq_ind_table) {
3402 err = -EOPNOTSUPP;
3403 goto err_uobj;
3404 }
3405 rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3407 if (IS_ERR(rwq_ind_tbl)) {
3408 err = PTR_ERR(rwq_ind_tbl);
3409 goto err_uobj;
3410 }
3412 rwq_ind_tbl->ind_tbl = wqs;
3413 rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3414 rwq_ind_tbl->uobject = uobj;
3415 uobj->object = rwq_ind_tbl;
3416 rwq_ind_tbl->device = ib_dev;
3417 atomic_set(&rwq_ind_tbl->usecnt, 0);
3419 for (i = 0; i < num_wq_handles; i++)
3420 atomic_inc(&wqs[i]->usecnt);
3422 resp.ind_tbl_handle = uobj->id;
3423 resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3424 resp.response_length = required_resp_len;
3426 err = ib_copy_to_udata(ucore,
3427 &resp, resp.response_length);
3428 if (err)
3429 goto err_copy;
3431 kfree(wqs_handles);
3433 for (j = 0; j < num_read_wqs; j++)
3434 uobj_put_obj_read(wqs[j]);
3436 return uobj_alloc_commit(uobj, 0);
3438 err_copy:
3439 ib_destroy_rwq_ind_table(rwq_ind_tbl);
3440 err_uobj:
3441 uobj_alloc_abort(uobj);
3442 put_wqs:
3443 for (j = 0; j < num_read_wqs; j++)
3444 uobj_put_obj_read(wqs[j]);
3445 err_free:
3446 kfree(wqs_handles);
3447 kfree(wqs);
3448 return err;
3449 }
3451 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3452 struct ib_udata *ucore,
3453 struct ib_udata *uhw)
3454 {
3455 struct ib_uverbs_ex_destroy_rwq_ind_table cmd = {};
3456 int ret;
3457 size_t required_cmd_sz;
3459 required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3461 if (ucore->inlen < required_cmd_sz)
3462 return -EINVAL;
3464 if (ucore->inlen > sizeof(cmd) &&
3465 !ib_is_udata_cleared(ucore, sizeof(cmd),
3466 ucore->inlen - sizeof(cmd)))
3467 return -EOPNOTSUPP;
3469 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3470 if (ret)
3471 return ret;
3473 if (cmd.comp_mask)
3474 return -EOPNOTSUPP;
3476 return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3477 cmd.ind_tbl_handle, file, 0);
3478 }
3480 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3481 struct ib_udata *ucore,
3482 struct ib_udata *uhw)
3483 {
3484 struct ib_uverbs_create_flow cmd;
3485 struct ib_uverbs_create_flow_resp resp;
3486 struct ib_uobject *uobj;
3487 struct ib_uflow_object *uflow;
3488 struct ib_flow *flow_id;
3489 struct ib_uverbs_flow_attr *kern_flow_attr;
3490 struct ib_flow_attr *flow_attr;
3491 struct ib_qp *qp;
3492 struct ib_uflow_resources *uflow_res;
3493 struct ib_uverbs_flow_spec_hdr *kern_spec;
3494 int err = 0;
3495 void *ib_spec;
3496 int i;
3497 struct ib_device *ib_dev;
3499 if (ucore->inlen < sizeof(cmd))
3500 return -EINVAL;
3502 if (ucore->outlen < sizeof(resp))
3503 return -ENOSPC;
3505 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3506 if (err)
3507 return err;
3509 ucore->inbuf += sizeof(cmd);
3510 ucore->inlen -= sizeof(cmd);
3512 if (cmd.comp_mask)
3513 return -EINVAL;
3515 if (!capable(CAP_NET_RAW))
3516 return -EPERM;
3518 if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3519 return -EINVAL;
3521 if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3522 ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3523 (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3524 return -EINVAL;
3526 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3527 return -EINVAL;
3529 if (cmd.flow_attr.size > ucore->inlen ||
3530 cmd.flow_attr.size >
3531 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3532 return -EINVAL;
3534 if (cmd.flow_attr.reserved[0] ||
3535 cmd.flow_attr.reserved[1])
3536 return -EINVAL;
3538 if (cmd.flow_attr.num_of_specs) {
3539 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3540 GFP_KERNEL);
3541 if (!kern_flow_attr)
3542 return -ENOMEM;
3544 *kern_flow_attr = cmd.flow_attr;
3545 err = ib_copy_from_udata(&kern_flow_attr->flow_specs, ucore,
3546 cmd.flow_attr.size);
3547 if (err)
3548 goto err_free_attr;
3549 } else {
3550 kern_flow_attr = &cmd.flow_attr;
3551 }
3553 uobj = uobj_alloc(UVERBS_OBJECT_FLOW, file, &ib_dev);
3554 if (IS_ERR(uobj)) {
3555 err = PTR_ERR(uobj);
3556 goto err_free_attr;
3557 }
3559 qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, file);
3560 if (!qp) {
3561 err = -EINVAL;
3562 goto err_uobj;
3563 }
3565 if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3566 err = -EINVAL;
3567 goto err_put;
3568 }
3570 if (!qp->device->create_flow) {
3571 err = -EOPNOTSUPP;
3572 goto err_put;
3573 }
3575 flow_attr = kzalloc(struct_size(flow_attr, flows,
3576 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3577 if (!flow_attr) {
3578 err = -ENOMEM;
3579 goto err_put;
3580 }
3581 uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3582 if (!uflow_res) {
3583 err = -ENOMEM;
3584 goto err_free_flow_attr;
3585 }
3587 flow_attr->type = kern_flow_attr->type;
3588 flow_attr->priority = kern_flow_attr->priority;
3589 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3590 flow_attr->port = kern_flow_attr->port;
3591 flow_attr->flags = kern_flow_attr->flags;
3592 flow_attr->size = sizeof(*flow_attr);
3594 kern_spec = kern_flow_attr->flow_specs;
3595 ib_spec = flow_attr + 1;
3596 for (i = 0; i < flow_attr->num_of_specs &&
3597 cmd.flow_attr.size >= sizeof(*kern_spec) &&
3598 cmd.flow_attr.size >= kern_spec->size;
3599 i++) {
3600 err = kern_spec_to_ib_spec(
3601 file, (struct ib_uverbs_flow_spec *)kern_spec,
3602 ib_spec, uflow_res);
3603 if (err)
3604 goto err_free;
3606 flow_attr->size +=
3607 ((union ib_flow_spec *) ib_spec)->size;
3608 cmd.flow_attr.size -= kern_spec->size;
3609 kern_spec = ((void *)kern_spec) + kern_spec->size;
3610 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3611 }
3612 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3613 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3614 i, cmd.flow_attr.size);
3615 err = -EINVAL;
3616 goto err_free;
3617 }
3619 flow_id = qp->device->create_flow(qp, flow_attr,
3620 IB_FLOW_DOMAIN_USER, uhw);
3622 if (IS_ERR(flow_id)) {
3623 err = PTR_ERR(flow_id);
3624 goto err_free;
3625 }
3626 atomic_inc(&qp->usecnt);
3627 flow_id->qp = qp;
3628 flow_id->device = qp->device;
3629 flow_id->uobject = uobj;
3630 uobj->object = flow_id;
3631 uflow = container_of(uobj, typeof(*uflow), uobject);
3632 uflow->resources = uflow_res;
3634 memset(&resp, 0, sizeof(resp));
3635 resp.flow_handle = uobj->id;
3637 err = ib_copy_to_udata(ucore,
3638 &resp, sizeof(resp));
3639 if (err)
3640 goto err_copy;
3642 uobj_put_obj_read(qp);
3643 kfree(flow_attr);
3644 if (cmd.flow_attr.num_of_specs)
3645 kfree(kern_flow_attr);
3646 return uobj_alloc_commit(uobj, 0);
3647 err_copy:
3648 if (!qp->device->destroy_flow(flow_id))
3649 atomic_dec(&qp->usecnt);
3650 err_free:
3651 ib_uverbs_flow_resources_free(uflow_res);
3652 err_free_flow_attr:
3653 kfree(flow_attr);
3654 err_put:
3655 uobj_put_obj_read(qp);
3656 err_uobj:
3657 uobj_alloc_abort(uobj);
3658 err_free_attr:
3659 if (cmd.flow_attr.num_of_specs)
3660 kfree(kern_flow_attr);
3661 return err;
3662 }
3664 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3665 struct ib_udata *ucore,
3666 struct ib_udata *uhw)
3667 {
3668 struct ib_uverbs_destroy_flow cmd;
3669 int ret;
3671 if (ucore->inlen < sizeof(cmd))
3672 return -EINVAL;
3674 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3675 if (ret)
3676 return ret;
3678 if (cmd.comp_mask)
3679 return -EINVAL;
3681 return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, file,
3682 0);
3683 }
3685 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3686 struct ib_uverbs_create_xsrq *cmd,
3687 struct ib_udata *udata)
3688 {
3689 struct ib_uverbs_create_srq_resp resp;
3690 struct ib_usrq_object *obj;
3691 struct ib_pd *pd;
3692 struct ib_srq *srq;
3693 struct ib_uobject *uninitialized_var(xrcd_uobj);
3694 struct ib_srq_init_attr attr;
3695 int ret;
3696 struct ib_device *ib_dev;
3698 obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, file,
3699 &ib_dev);
3700 if (IS_ERR(obj))
3701 return PTR_ERR(obj);
3703 if (cmd->srq_type == IB_SRQT_TM)
3704 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3706 if (cmd->srq_type == IB_SRQT_XRC) {
3707 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3708 file);
3709 if (IS_ERR(xrcd_uobj)) {
3710 ret = -EINVAL;
3711 goto err;
3712 }
3714 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3715 if (!attr.ext.xrc.xrcd) {
3716 ret = -EINVAL;
3717 goto err_put_xrcd;
3718 }
3720 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3721 atomic_inc(&obj->uxrcd->refcnt);
3722 }
3724 if (ib_srq_has_cq(cmd->srq_type)) {
3725 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3726 cmd->cq_handle, file);
3727 if (!attr.ext.cq) {
3728 ret = -EINVAL;
3729 goto err_put_xrcd;
3730 }
3731 }
3733 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, file);
3734 if (!pd) {
3735 ret = -EINVAL;
3736 goto err_put_cq;
3737 }
3739 attr.event_handler = ib_uverbs_srq_event_handler;
3740 attr.srq_context = file;
3741 attr.srq_type = cmd->srq_type;
3742 attr.attr.max_wr = cmd->max_wr;
3743 attr.attr.max_sge = cmd->max_sge;
3744 attr.attr.srq_limit = cmd->srq_limit;
3746 obj->uevent.events_reported = 0;
3747 INIT_LIST_HEAD(&obj->uevent.event_list);
3749 srq = pd->device->create_srq(pd, &attr, udata);
3750 if (IS_ERR(srq)) {
3751 ret = PTR_ERR(srq);
3752 goto err_put;
3753 }
3755 srq->device = pd->device;
3756 srq->pd = pd;
3757 srq->srq_type = cmd->srq_type;
3758 srq->uobject = &obj->uevent.uobject;
3759 srq->event_handler = attr.event_handler;
3760 srq->srq_context = attr.srq_context;
3762 if (ib_srq_has_cq(cmd->srq_type)) {
3763 srq->ext.cq = attr.ext.cq;
3764 atomic_inc(&attr.ext.cq->usecnt);
3765 }
3767 if (cmd->srq_type == IB_SRQT_XRC) {
3768 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3769 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3770 }
3772 atomic_inc(&pd->usecnt);
3773 atomic_set(&srq->usecnt, 0);
3775 obj->uevent.uobject.object = srq;
3776 obj->uevent.uobject.user_handle = cmd->user_handle;
3778 memset(&resp, 0, sizeof resp);
3779 resp.srq_handle = obj->uevent.uobject.id;
3780 resp.max_wr = attr.attr.max_wr;
3781 resp.max_sge = attr.attr.max_sge;
3782 if (cmd->srq_type == IB_SRQT_XRC)
3783 resp.srqn = srq->ext.xrc.srq_num;
3785 if (copy_to_user(u64_to_user_ptr(cmd->response),
3786 &resp, sizeof resp)) {
3787 ret = -EFAULT;
3788 goto err_copy;
3789 }
3791 if (cmd->srq_type == IB_SRQT_XRC)
3792 uobj_put_read(xrcd_uobj);
3794 if (ib_srq_has_cq(cmd->srq_type))
3795 uobj_put_obj_read(attr.ext.cq);
3797 uobj_put_obj_read(pd);
3798 return uobj_alloc_commit(&obj->uevent.uobject, 0);
3800 err_copy:
3801 ib_destroy_srq(srq);
3803 err_put:
3804 uobj_put_obj_read(pd);
3806 err_put_cq:
3807 if (ib_srq_has_cq(cmd->srq_type))
3808 uobj_put_obj_read(attr.ext.cq);
3810 err_put_xrcd:
3811 if (cmd->srq_type == IB_SRQT_XRC) {
3812 atomic_dec(&obj->uxrcd->refcnt);
3813 uobj_put_read(xrcd_uobj);
3814 }
3816 err:
3817 uobj_alloc_abort(&obj->uevent.uobject);
3818 return ret;
3819 }
3821 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3822 const char __user *buf, int in_len,
3823 int out_len)
3824 {
3825 struct ib_uverbs_create_srq cmd;
3826 struct ib_uverbs_create_xsrq xcmd;
3827 struct ib_uverbs_create_srq_resp resp;
3828 struct ib_udata udata;
3829 int ret;
3831 if (out_len < sizeof resp)
3832 return -ENOSPC;
3834 if (copy_from_user(&cmd, buf, sizeof cmd))
3835 return -EFAULT;
3837 memset(&xcmd, 0, sizeof(xcmd));
3838 xcmd.response = cmd.response;
3839 xcmd.user_handle = cmd.user_handle;
3840 xcmd.srq_type = IB_SRQT_BASIC;
3841 xcmd.pd_handle = cmd.pd_handle;
3842 xcmd.max_wr = cmd.max_wr;
3843 xcmd.max_sge = cmd.max_sge;
3844 xcmd.srq_limit = cmd.srq_limit;
3846 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
3847 u64_to_user_ptr(cmd.response) + sizeof(resp),
3848 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
3849 out_len - sizeof(resp));
3851 ret = __uverbs_create_xsrq(file, &xcmd, &udata);
3852 if (ret)
3853 return ret;
3855 return in_len;
3856 }
3858 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3859 const char __user *buf, int in_len, int out_len)
3860 {
3861 struct ib_uverbs_create_xsrq cmd;
3862 struct ib_uverbs_create_srq_resp resp;
3863 struct ib_udata udata;
3864 int ret;
3866 if (out_len < sizeof resp)
3867 return -ENOSPC;
3869 if (copy_from_user(&cmd, buf, sizeof cmd))
3870 return -EFAULT;
3872 ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
3873 u64_to_user_ptr(cmd.response) + sizeof(resp),
3874 in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
3875 out_len - sizeof(resp));
3877 ret = __uverbs_create_xsrq(file, &cmd, &udata);
3878 if (ret)
3879 return ret;
3881 return in_len;
3882 }
3884 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3885 const char __user *buf, int in_len,
3886 int out_len)
3887 {
3888 struct ib_uverbs_modify_srq cmd;
3889 struct ib_udata udata;
3890 struct ib_srq *srq;
3891 struct ib_srq_attr attr;
3892 int ret;
3894 if (copy_from_user(&cmd, buf, sizeof cmd))
3895 return -EFAULT;
3897 ib_uverbs_init_udata(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3898 out_len);
3900 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, file);
3901 if (!srq)
3902 return -EINVAL;
3904 attr.max_wr = cmd.max_wr;
3905 attr.srq_limit = cmd.srq_limit;
3907 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3909 uobj_put_obj_read(srq);
3911 return ret ? ret : in_len;
3912 }
3914 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3915 const char __user *buf,
3916 int in_len, int out_len)
3917 {
3918 struct ib_uverbs_query_srq cmd;
3919 struct ib_uverbs_query_srq_resp resp;
3920 struct ib_srq_attr attr;
3921 struct ib_srq *srq;
3922 int ret;
3924 if (out_len < sizeof resp)
3925 return -ENOSPC;
3927 if (copy_from_user(&cmd, buf, sizeof cmd))
3928 return -EFAULT;
3930 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, file);
3931 if (!srq)
3932 return -EINVAL;
3934 ret = ib_query_srq(srq, &attr);
3936 uobj_put_obj_read(srq);
3938 if (ret)
3939 return ret;
3941 memset(&resp, 0, sizeof resp);
3943 resp.max_wr = attr.max_wr;
3944 resp.max_sge = attr.max_sge;
3945 resp.srq_limit = attr.srq_limit;
3947 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
3948 return -EFAULT;
3950 return in_len;
3951 }
3953 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3954 const char __user *buf, int in_len,
3955 int out_len)
3956 {
3957 struct ib_uverbs_destroy_srq cmd;
3958 struct ib_uverbs_destroy_srq_resp resp;
3959 struct ib_uobject *uobj;
3960 struct ib_uevent_object *obj;
3962 if (copy_from_user(&cmd, buf, sizeof cmd))
3963 return -EFAULT;
3965 uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, file);
3966 if (IS_ERR(uobj))
3967 return PTR_ERR(uobj);
3969 obj = container_of(uobj, struct ib_uevent_object, uobject);
3970 memset(&resp, 0, sizeof(resp));
3971 resp.events_reported = obj->events_reported;
3973 uobj_put_destroy(uobj);
3975 if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
3976 return -EFAULT;
3978 return in_len;
3979 }
3981 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3982 struct ib_udata *ucore,
3983 struct ib_udata *uhw)
3984 {
3985 struct ib_uverbs_ex_query_device_resp resp = { {0} };
3986 struct ib_uverbs_ex_query_device cmd;
3987 struct ib_device_attr attr = {0};
3988 struct ib_ucontext *ucontext;
3989 struct ib_device *ib_dev;
3990 int err;
3992 ucontext = ib_uverbs_get_ucontext(file);
3993 if (IS_ERR(ucontext))
3994 return PTR_ERR(ucontext);
3995 ib_dev = ucontext->device;
3997 if (!ib_dev->query_device)
3998 return -EOPNOTSUPP;
4000 if (ucore->inlen < sizeof(cmd))
4001 return -EINVAL;
4003 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
4004 if (err)
4005 return err;
4007 if (cmd.comp_mask)
4008 return -EINVAL;
4010 if (cmd.reserved)
4011 return -EINVAL;
4013 resp.response_length = offsetof(typeof(resp), odp_caps);
4015 if (ucore->outlen < resp.response_length)
4016 return -ENOSPC;
4018 err = ib_dev->query_device(ib_dev, &attr, uhw);
4019 if (err)
4020 return err;
4022 copy_query_dev_fields(ucontext, &resp.base, &attr);
4024 if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
4025 goto end;
4027 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
4028 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
4029 resp.odp_caps.per_transport_caps.rc_odp_caps =
4030 attr.odp_caps.per_transport_caps.rc_odp_caps;
4031 resp.odp_caps.per_transport_caps.uc_odp_caps =
4032 attr.odp_caps.per_transport_caps.uc_odp_caps;
4033 resp.odp_caps.per_transport_caps.ud_odp_caps =
4034 attr.odp_caps.per_transport_caps.ud_odp_caps;
4035 #endif
4036 resp.response_length += sizeof(resp.odp_caps);
4038 if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
4039 goto end;
4041 resp.timestamp_mask = attr.timestamp_mask;
4042 resp.response_length += sizeof(resp.timestamp_mask);
4044 if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
4045 goto end;
4047 resp.hca_core_clock = attr.hca_core_clock;
4048 resp.response_length += sizeof(resp.hca_core_clock);
4050 if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
4051 goto end;
4053 resp.device_cap_flags_ex = attr.device_cap_flags;
4054 resp.response_length += sizeof(resp.device_cap_flags_ex);
4056 if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
4057 goto end;
4059 resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
4060 resp.rss_caps.max_rwq_indirection_tables =
4061 attr.rss_caps.max_rwq_indirection_tables;
4062 resp.rss_caps.max_rwq_indirection_table_size =
4063 attr.rss_caps.max_rwq_indirection_table_size;
4065 resp.response_length += sizeof(resp.rss_caps);
4067 if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
4068 goto end;
4070 resp.max_wq_type_rq = attr.max_wq_type_rq;
4071 resp.response_length += sizeof(resp.max_wq_type_rq);
4073 if (ucore->outlen < resp.response_length + sizeof(resp.raw_packet_caps))
4074 goto end;
4076 resp.raw_packet_caps = attr.raw_packet_caps;
4077 resp.response_length += sizeof(resp.raw_packet_caps);
4079 if (ucore->outlen < resp.response_length + sizeof(resp.tm_caps))
4080 goto end;
4082 resp.tm_caps.max_rndv_hdr_size = attr.tm_caps.max_rndv_hdr_size;
4083 resp.tm_caps.max_num_tags = attr.tm_caps.max_num_tags;
4084 resp.tm_caps.max_ops = attr.tm_caps.max_ops;
4085 resp.tm_caps.max_sge = attr.tm_caps.max_sge;
4086 resp.tm_caps.flags = attr.tm_caps.flags;
4087 resp.response_length += sizeof(resp.tm_caps);
4089 if (ucore->outlen < resp.response_length + sizeof(resp.cq_moderation_caps))
4090 goto end;
4092 resp.cq_moderation_caps.max_cq_moderation_count =
4093 attr.cq_caps.max_cq_moderation_count;
4094 resp.cq_moderation_caps.max_cq_moderation_period =
4095 attr.cq_caps.max_cq_moderation_period;
4096 resp.response_length += sizeof(resp.cq_moderation_caps);
4098 if (ucore->outlen < resp.response_length + sizeof(resp.max_dm_size))
4099 goto end;
4101 resp.max_dm_size = attr.max_dm_size;
4102 resp.response_length += sizeof(resp.max_dm_size);
4103 end:
4104 err = ib_copy_to_udata(ucore, &resp, resp.response_length);
4105 return err;
4106 }
4108 int ib_uverbs_ex_modify_cq(struct ib_uverbs_file *file,
4109 struct ib_udata *ucore,
4110 struct ib_udata *uhw)
4111 {
4112 struct ib_uverbs_ex_modify_cq cmd = {};
4113 struct ib_cq *cq;
4114 size_t required_cmd_sz;
4115 int ret;
4117 required_cmd_sz = offsetof(typeof(cmd), reserved) +
4118 sizeof(cmd.reserved);
4119 if (ucore->inlen < required_cmd_sz)
4120 return -EINVAL;
4122 /* sanity checks */
4123 if (ucore->inlen > sizeof(cmd) &&
4124 !ib_is_udata_cleared(ucore, sizeof(cmd),
4125 ucore->inlen - sizeof(cmd)))
4126 return -EOPNOTSUPP;
4128 ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
4129 if (ret)
4130 return ret;
4132 if (!cmd.attr_mask || cmd.reserved)
4133 return -EINVAL;
4135 if (cmd.attr_mask > IB_CQ_MODERATE)
4136 return -EOPNOTSUPP;
4138 cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, file);
4139 if (!cq)
4140 return -EINVAL;
4142 ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
4144 uobj_put_obj_read(cq);
4146 return ret;
4147 }