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.
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:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
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.
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
36 #include <linux/file.h>
38 #include <linux/slab.h>
39 #include <linux/sched.h>
41 #include <asm/uaccess.h>
44 #include "core_priv.h"
46 struct uverbs_lock_class {
47 struct lock_class_key key;
51 static struct uverbs_lock_class pd_lock_class = { .name = "PD-uobj" };
52 static struct uverbs_lock_class mr_lock_class = { .name = "MR-uobj" };
53 static struct uverbs_lock_class mw_lock_class = { .name = "MW-uobj" };
54 static struct uverbs_lock_class cq_lock_class = { .name = "CQ-uobj" };
55 static struct uverbs_lock_class qp_lock_class = { .name = "QP-uobj" };
56 static struct uverbs_lock_class ah_lock_class = { .name = "AH-uobj" };
57 static struct uverbs_lock_class srq_lock_class = { .name = "SRQ-uobj" };
58 static struct uverbs_lock_class xrcd_lock_class = { .name = "XRCD-uobj" };
59 static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" };
62 * The ib_uobject locking scheme is as follows:
64 * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
65 * needs to be held during all idr operations. When an object is
66 * looked up, a reference must be taken on the object's kref before
69 * - Each object also has an rwsem. This rwsem must be held for
70 * reading while an operation that uses the object is performed.
71 * For example, while registering an MR, the associated PD's
72 * uobject.mutex must be held for reading. The rwsem must be held
73 * for writing while initializing or destroying an object.
75 * - In addition, each object has a "live" flag. If this flag is not
76 * set, then lookups of the object will fail even if it is found in
77 * the idr. This handles a reader that blocks and does not acquire
78 * the rwsem until after the object is destroyed. The destroy
79 * operation will set the live flag to 0 and then drop the rwsem;
80 * this will allow the reader to acquire the rwsem, see that the
81 * live flag is 0, and then drop the rwsem and its reference to
82 * object. The underlying storage will not be freed until the last
83 * reference to the object is dropped.
86 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
87 struct ib_ucontext *context, struct uverbs_lock_class *c)
89 uobj->user_handle = user_handle;
90 uobj->context = context;
91 kref_init(&uobj->ref);
92 init_rwsem(&uobj->mutex);
93 lockdep_set_class_and_name(&uobj->mutex, &c->key, c->name);
97 static void release_uobj(struct kref *kref)
99 kfree(container_of(kref, struct ib_uobject, ref));
102 static void put_uobj(struct ib_uobject *uobj)
104 kref_put(&uobj->ref, release_uobj);
107 static void put_uobj_read(struct ib_uobject *uobj)
109 up_read(&uobj->mutex);
113 static void put_uobj_write(struct ib_uobject *uobj)
115 up_write(&uobj->mutex);
119 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
123 idr_preload(GFP_KERNEL);
124 spin_lock(&ib_uverbs_idr_lock);
126 ret = idr_alloc(idr, uobj, 0, 0, GFP_NOWAIT);
130 spin_unlock(&ib_uverbs_idr_lock);
133 return ret < 0 ? ret : 0;
136 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
138 spin_lock(&ib_uverbs_idr_lock);
139 idr_remove(idr, uobj->id);
140 spin_unlock(&ib_uverbs_idr_lock);
143 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
144 struct ib_ucontext *context)
146 struct ib_uobject *uobj;
148 spin_lock(&ib_uverbs_idr_lock);
149 uobj = idr_find(idr, id);
151 if (uobj->context == context)
152 kref_get(&uobj->ref);
156 spin_unlock(&ib_uverbs_idr_lock);
161 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
162 struct ib_ucontext *context, int nested)
164 struct ib_uobject *uobj;
166 uobj = __idr_get_uobj(idr, id, context);
171 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
173 down_read(&uobj->mutex);
182 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
183 struct ib_ucontext *context)
185 struct ib_uobject *uobj;
187 uobj = __idr_get_uobj(idr, id, context);
191 down_write(&uobj->mutex);
193 put_uobj_write(uobj);
200 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
203 struct ib_uobject *uobj;
205 uobj = idr_read_uobj(idr, id, context, nested);
206 return uobj ? uobj->object : NULL;
209 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
211 return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
214 static void put_pd_read(struct ib_pd *pd)
216 put_uobj_read(pd->uobject);
219 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
221 return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
224 static void put_cq_read(struct ib_cq *cq)
226 put_uobj_read(cq->uobject);
229 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
231 return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
234 static void put_ah_read(struct ib_ah *ah)
236 put_uobj_read(ah->uobject);
239 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
241 return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
244 static struct ib_qp *idr_write_qp(int qp_handle, struct ib_ucontext *context)
246 struct ib_uobject *uobj;
248 uobj = idr_write_uobj(&ib_uverbs_qp_idr, qp_handle, context);
249 return uobj ? uobj->object : NULL;
252 static void put_qp_read(struct ib_qp *qp)
254 put_uobj_read(qp->uobject);
257 static void put_qp_write(struct ib_qp *qp)
259 put_uobj_write(qp->uobject);
262 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
264 return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
267 static void put_srq_read(struct ib_srq *srq)
269 put_uobj_read(srq->uobject);
272 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle, struct ib_ucontext *context,
273 struct ib_uobject **uobj)
275 *uobj = idr_read_uobj(&ib_uverbs_xrcd_idr, xrcd_handle, context, 0);
276 return *uobj ? (*uobj)->object : NULL;
279 static void put_xrcd_read(struct ib_uobject *uobj)
284 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
285 struct ib_device *ib_dev,
286 const char __user *buf,
287 int in_len, int out_len)
289 struct ib_uverbs_get_context cmd;
290 struct ib_uverbs_get_context_resp resp;
291 struct ib_udata udata;
292 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
293 struct ib_device_attr dev_attr;
295 struct ib_ucontext *ucontext;
299 if (out_len < sizeof resp)
302 if (copy_from_user(&cmd, buf, sizeof cmd))
305 mutex_lock(&file->mutex);
307 if (file->ucontext) {
312 INIT_UDATA(&udata, buf + sizeof cmd,
313 (unsigned long) cmd.response + sizeof resp,
314 in_len - sizeof cmd, out_len - sizeof resp);
316 ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
317 if (IS_ERR(ucontext)) {
318 ret = PTR_ERR(ucontext);
322 ucontext->device = ib_dev;
323 INIT_LIST_HEAD(&ucontext->pd_list);
324 INIT_LIST_HEAD(&ucontext->mr_list);
325 INIT_LIST_HEAD(&ucontext->mw_list);
326 INIT_LIST_HEAD(&ucontext->cq_list);
327 INIT_LIST_HEAD(&ucontext->qp_list);
328 INIT_LIST_HEAD(&ucontext->srq_list);
329 INIT_LIST_HEAD(&ucontext->ah_list);
330 INIT_LIST_HEAD(&ucontext->xrcd_list);
331 INIT_LIST_HEAD(&ucontext->rule_list);
333 ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
335 ucontext->closing = 0;
337 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
338 ucontext->umem_tree = RB_ROOT;
339 init_rwsem(&ucontext->umem_rwsem);
340 ucontext->odp_mrs_count = 0;
341 INIT_LIST_HEAD(&ucontext->no_private_counters);
343 ret = ib_query_device(ib_dev, &dev_attr);
346 if (!(dev_attr.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
347 ucontext->invalidate_range = NULL;
351 resp.num_comp_vectors = file->device->num_comp_vectors;
353 ret = get_unused_fd_flags(O_CLOEXEC);
358 filp = ib_uverbs_alloc_event_file(file, ib_dev, 1);
364 if (copy_to_user((void __user *) (unsigned long) cmd.response,
365 &resp, sizeof resp)) {
370 file->ucontext = ucontext;
372 fd_install(resp.async_fd, filp);
374 mutex_unlock(&file->mutex);
379 ib_uverbs_free_async_event_file(file);
383 put_unused_fd(resp.async_fd);
386 put_pid(ucontext->tgid);
387 ib_dev->dealloc_ucontext(ucontext);
390 mutex_unlock(&file->mutex);
394 static void copy_query_dev_fields(struct ib_uverbs_file *file,
395 struct ib_device *ib_dev,
396 struct ib_uverbs_query_device_resp *resp,
397 struct ib_device_attr *attr)
399 resp->fw_ver = attr->fw_ver;
400 resp->node_guid = ib_dev->node_guid;
401 resp->sys_image_guid = attr->sys_image_guid;
402 resp->max_mr_size = attr->max_mr_size;
403 resp->page_size_cap = attr->page_size_cap;
404 resp->vendor_id = attr->vendor_id;
405 resp->vendor_part_id = attr->vendor_part_id;
406 resp->hw_ver = attr->hw_ver;
407 resp->max_qp = attr->max_qp;
408 resp->max_qp_wr = attr->max_qp_wr;
409 resp->device_cap_flags = attr->device_cap_flags;
410 resp->max_sge = attr->max_sge;
411 resp->max_sge_rd = attr->max_sge_rd;
412 resp->max_cq = attr->max_cq;
413 resp->max_cqe = attr->max_cqe;
414 resp->max_mr = attr->max_mr;
415 resp->max_pd = attr->max_pd;
416 resp->max_qp_rd_atom = attr->max_qp_rd_atom;
417 resp->max_ee_rd_atom = attr->max_ee_rd_atom;
418 resp->max_res_rd_atom = attr->max_res_rd_atom;
419 resp->max_qp_init_rd_atom = attr->max_qp_init_rd_atom;
420 resp->max_ee_init_rd_atom = attr->max_ee_init_rd_atom;
421 resp->atomic_cap = attr->atomic_cap;
422 resp->max_ee = attr->max_ee;
423 resp->max_rdd = attr->max_rdd;
424 resp->max_mw = attr->max_mw;
425 resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
426 resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
427 resp->max_mcast_grp = attr->max_mcast_grp;
428 resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
429 resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
430 resp->max_ah = attr->max_ah;
431 resp->max_fmr = attr->max_fmr;
432 resp->max_map_per_fmr = attr->max_map_per_fmr;
433 resp->max_srq = attr->max_srq;
434 resp->max_srq_wr = attr->max_srq_wr;
435 resp->max_srq_sge = attr->max_srq_sge;
436 resp->max_pkeys = attr->max_pkeys;
437 resp->local_ca_ack_delay = attr->local_ca_ack_delay;
438 resp->phys_port_cnt = ib_dev->phys_port_cnt;
441 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
442 struct ib_device *ib_dev,
443 const char __user *buf,
444 int in_len, int out_len)
446 struct ib_uverbs_query_device cmd;
447 struct ib_uverbs_query_device_resp resp;
448 struct ib_device_attr attr;
451 if (out_len < sizeof resp)
454 if (copy_from_user(&cmd, buf, sizeof cmd))
457 ret = ib_query_device(ib_dev, &attr);
461 memset(&resp, 0, sizeof resp);
462 copy_query_dev_fields(file, ib_dev, &resp, &attr);
464 if (copy_to_user((void __user *) (unsigned long) cmd.response,
471 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
472 struct ib_device *ib_dev,
473 const char __user *buf,
474 int in_len, int out_len)
476 struct ib_uverbs_query_port cmd;
477 struct ib_uverbs_query_port_resp resp;
478 struct ib_port_attr attr;
481 if (out_len < sizeof resp)
484 if (copy_from_user(&cmd, buf, sizeof cmd))
487 ret = ib_query_port(ib_dev, cmd.port_num, &attr);
491 memset(&resp, 0, sizeof resp);
493 resp.state = attr.state;
494 resp.max_mtu = attr.max_mtu;
495 resp.active_mtu = attr.active_mtu;
496 resp.gid_tbl_len = attr.gid_tbl_len;
497 resp.port_cap_flags = attr.port_cap_flags;
498 resp.max_msg_sz = attr.max_msg_sz;
499 resp.bad_pkey_cntr = attr.bad_pkey_cntr;
500 resp.qkey_viol_cntr = attr.qkey_viol_cntr;
501 resp.pkey_tbl_len = attr.pkey_tbl_len;
503 resp.sm_lid = attr.sm_lid;
505 resp.max_vl_num = attr.max_vl_num;
506 resp.sm_sl = attr.sm_sl;
507 resp.subnet_timeout = attr.subnet_timeout;
508 resp.init_type_reply = attr.init_type_reply;
509 resp.active_width = attr.active_width;
510 resp.active_speed = attr.active_speed;
511 resp.phys_state = attr.phys_state;
512 resp.link_layer = rdma_port_get_link_layer(ib_dev,
515 if (copy_to_user((void __user *) (unsigned long) cmd.response,
522 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
523 struct ib_device *ib_dev,
524 const char __user *buf,
525 int in_len, int out_len)
527 struct ib_uverbs_alloc_pd cmd;
528 struct ib_uverbs_alloc_pd_resp resp;
529 struct ib_udata udata;
530 struct ib_uobject *uobj;
534 if (out_len < sizeof resp)
537 if (copy_from_user(&cmd, buf, sizeof cmd))
540 INIT_UDATA(&udata, buf + sizeof cmd,
541 (unsigned long) cmd.response + sizeof resp,
542 in_len - sizeof cmd, out_len - sizeof resp);
544 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
548 init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
549 down_write(&uobj->mutex);
551 pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
560 atomic_set(&pd->usecnt, 0);
563 ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
567 memset(&resp, 0, sizeof resp);
568 resp.pd_handle = uobj->id;
570 if (copy_to_user((void __user *) (unsigned long) cmd.response,
571 &resp, sizeof resp)) {
576 mutex_lock(&file->mutex);
577 list_add_tail(&uobj->list, &file->ucontext->pd_list);
578 mutex_unlock(&file->mutex);
582 up_write(&uobj->mutex);
587 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
593 put_uobj_write(uobj);
597 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
598 struct ib_device *ib_dev,
599 const char __user *buf,
600 int in_len, int out_len)
602 struct ib_uverbs_dealloc_pd cmd;
603 struct ib_uobject *uobj;
607 if (copy_from_user(&cmd, buf, sizeof cmd))
610 uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
615 if (atomic_read(&pd->usecnt)) {
620 ret = pd->device->dealloc_pd(uobj->object);
621 WARN_ONCE(ret, "Infiniband HW driver failed dealloc_pd");
626 put_uobj_write(uobj);
628 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
630 mutex_lock(&file->mutex);
631 list_del(&uobj->list);
632 mutex_unlock(&file->mutex);
639 put_uobj_write(uobj);
643 struct xrcd_table_entry {
645 struct ib_xrcd *xrcd;
649 static int xrcd_table_insert(struct ib_uverbs_device *dev,
651 struct ib_xrcd *xrcd)
653 struct xrcd_table_entry *entry, *scan;
654 struct rb_node **p = &dev->xrcd_tree.rb_node;
655 struct rb_node *parent = NULL;
657 entry = kmalloc(sizeof *entry, GFP_KERNEL);
662 entry->inode = inode;
666 scan = rb_entry(parent, struct xrcd_table_entry, node);
668 if (inode < scan->inode) {
670 } else if (inode > scan->inode) {
678 rb_link_node(&entry->node, parent, p);
679 rb_insert_color(&entry->node, &dev->xrcd_tree);
684 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
687 struct xrcd_table_entry *entry;
688 struct rb_node *p = dev->xrcd_tree.rb_node;
691 entry = rb_entry(p, struct xrcd_table_entry, node);
693 if (inode < entry->inode)
695 else if (inode > entry->inode)
704 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
706 struct xrcd_table_entry *entry;
708 entry = xrcd_table_search(dev, inode);
715 static void xrcd_table_delete(struct ib_uverbs_device *dev,
718 struct xrcd_table_entry *entry;
720 entry = xrcd_table_search(dev, inode);
723 rb_erase(&entry->node, &dev->xrcd_tree);
728 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
729 struct ib_device *ib_dev,
730 const char __user *buf, int in_len,
733 struct ib_uverbs_open_xrcd cmd;
734 struct ib_uverbs_open_xrcd_resp resp;
735 struct ib_udata udata;
736 struct ib_uxrcd_object *obj;
737 struct ib_xrcd *xrcd = NULL;
738 struct fd f = {NULL, 0};
739 struct inode *inode = NULL;
743 if (out_len < sizeof resp)
746 if (copy_from_user(&cmd, buf, sizeof cmd))
749 INIT_UDATA(&udata, buf + sizeof cmd,
750 (unsigned long) cmd.response + sizeof resp,
751 in_len - sizeof cmd, out_len - sizeof resp);
753 mutex_lock(&file->device->xrcd_tree_mutex);
756 /* search for file descriptor */
760 goto err_tree_mutex_unlock;
763 inode = file_inode(f.file);
764 xrcd = find_xrcd(file->device, inode);
765 if (!xrcd && !(cmd.oflags & O_CREAT)) {
766 /* no file descriptor. Need CREATE flag */
768 goto err_tree_mutex_unlock;
771 if (xrcd && cmd.oflags & O_EXCL) {
773 goto err_tree_mutex_unlock;
777 obj = kmalloc(sizeof *obj, GFP_KERNEL);
780 goto err_tree_mutex_unlock;
783 init_uobj(&obj->uobject, 0, file->ucontext, &xrcd_lock_class);
785 down_write(&obj->uobject.mutex);
788 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
795 xrcd->device = ib_dev;
796 atomic_set(&xrcd->usecnt, 0);
797 mutex_init(&xrcd->tgt_qp_mutex);
798 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
802 atomic_set(&obj->refcnt, 0);
803 obj->uobject.object = xrcd;
804 ret = idr_add_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
808 memset(&resp, 0, sizeof resp);
809 resp.xrcd_handle = obj->uobject.id;
813 /* create new inode/xrcd table entry */
814 ret = xrcd_table_insert(file->device, inode, xrcd);
816 goto err_insert_xrcd;
818 atomic_inc(&xrcd->usecnt);
821 if (copy_to_user((void __user *) (unsigned long) cmd.response,
822 &resp, sizeof resp)) {
830 mutex_lock(&file->mutex);
831 list_add_tail(&obj->uobject.list, &file->ucontext->xrcd_list);
832 mutex_unlock(&file->mutex);
834 obj->uobject.live = 1;
835 up_write(&obj->uobject.mutex);
837 mutex_unlock(&file->device->xrcd_tree_mutex);
843 xrcd_table_delete(file->device, inode);
844 atomic_dec(&xrcd->usecnt);
848 idr_remove_uobj(&ib_uverbs_xrcd_idr, &obj->uobject);
851 ib_dealloc_xrcd(xrcd);
854 put_uobj_write(&obj->uobject);
856 err_tree_mutex_unlock:
860 mutex_unlock(&file->device->xrcd_tree_mutex);
865 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
866 struct ib_device *ib_dev,
867 const char __user *buf, int in_len,
870 struct ib_uverbs_close_xrcd cmd;
871 struct ib_uobject *uobj;
872 struct ib_xrcd *xrcd = NULL;
873 struct inode *inode = NULL;
874 struct ib_uxrcd_object *obj;
878 if (copy_from_user(&cmd, buf, sizeof cmd))
881 mutex_lock(&file->device->xrcd_tree_mutex);
882 uobj = idr_write_uobj(&ib_uverbs_xrcd_idr, cmd.xrcd_handle, file->ucontext);
890 obj = container_of(uobj, struct ib_uxrcd_object, uobject);
891 if (atomic_read(&obj->refcnt)) {
892 put_uobj_write(uobj);
897 if (!inode || atomic_dec_and_test(&xrcd->usecnt)) {
898 ret = ib_dealloc_xrcd(uobj->object);
905 atomic_inc(&xrcd->usecnt);
907 put_uobj_write(uobj);
913 xrcd_table_delete(file->device, inode);
915 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
916 mutex_lock(&file->mutex);
917 list_del(&uobj->list);
918 mutex_unlock(&file->mutex);
924 mutex_unlock(&file->device->xrcd_tree_mutex);
928 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
929 struct ib_xrcd *xrcd)
934 if (inode && !atomic_dec_and_test(&xrcd->usecnt))
937 ib_dealloc_xrcd(xrcd);
940 xrcd_table_delete(dev, inode);
943 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
944 struct ib_device *ib_dev,
945 const char __user *buf, int in_len,
948 struct ib_uverbs_reg_mr cmd;
949 struct ib_uverbs_reg_mr_resp resp;
950 struct ib_udata udata;
951 struct ib_uobject *uobj;
956 if (out_len < sizeof resp)
959 if (copy_from_user(&cmd, buf, sizeof cmd))
962 INIT_UDATA(&udata, buf + sizeof cmd,
963 (unsigned long) cmd.response + sizeof resp,
964 in_len - sizeof cmd, out_len - sizeof resp);
966 if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
969 ret = ib_check_mr_access(cmd.access_flags);
973 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
977 init_uobj(uobj, 0, file->ucontext, &mr_lock_class);
978 down_write(&uobj->mutex);
980 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
986 if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
987 struct ib_device_attr attr;
989 ret = ib_query_device(pd->device, &attr);
990 if (ret || !(attr.device_cap_flags &
991 IB_DEVICE_ON_DEMAND_PAGING)) {
992 pr_debug("ODP support not available\n");
998 mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
999 cmd.access_flags, &udata);
1005 mr->device = pd->device;
1008 atomic_inc(&pd->usecnt);
1009 atomic_set(&mr->usecnt, 0);
1012 ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
1016 memset(&resp, 0, sizeof resp);
1017 resp.lkey = mr->lkey;
1018 resp.rkey = mr->rkey;
1019 resp.mr_handle = uobj->id;
1021 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1022 &resp, sizeof resp)) {
1029 mutex_lock(&file->mutex);
1030 list_add_tail(&uobj->list, &file->ucontext->mr_list);
1031 mutex_unlock(&file->mutex);
1035 up_write(&uobj->mutex);
1040 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1049 put_uobj_write(uobj);
1053 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
1054 struct ib_device *ib_dev,
1055 const char __user *buf, int in_len,
1058 struct ib_uverbs_rereg_mr cmd;
1059 struct ib_uverbs_rereg_mr_resp resp;
1060 struct ib_udata udata;
1061 struct ib_pd *pd = NULL;
1063 struct ib_pd *old_pd;
1065 struct ib_uobject *uobj;
1067 if (out_len < sizeof(resp))
1070 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1073 INIT_UDATA(&udata, buf + sizeof(cmd),
1074 (unsigned long) cmd.response + sizeof(resp),
1075 in_len - sizeof(cmd), out_len - sizeof(resp));
1077 if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
1080 if ((cmd.flags & IB_MR_REREG_TRANS) &&
1081 (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
1082 (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
1085 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle,
1093 if (cmd.flags & IB_MR_REREG_ACCESS) {
1094 ret = ib_check_mr_access(cmd.access_flags);
1099 if (cmd.flags & IB_MR_REREG_PD) {
1100 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1107 if (atomic_read(&mr->usecnt)) {
1113 ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
1114 cmd.length, cmd.hca_va,
1115 cmd.access_flags, pd, &udata);
1117 if (cmd.flags & IB_MR_REREG_PD) {
1118 atomic_inc(&pd->usecnt);
1120 atomic_dec(&old_pd->usecnt);
1126 memset(&resp, 0, sizeof(resp));
1127 resp.lkey = mr->lkey;
1128 resp.rkey = mr->rkey;
1130 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1131 &resp, sizeof(resp)))
1137 if (cmd.flags & IB_MR_REREG_PD)
1142 put_uobj_write(mr->uobject);
1147 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
1148 struct ib_device *ib_dev,
1149 const char __user *buf, int in_len,
1152 struct ib_uverbs_dereg_mr cmd;
1154 struct ib_uobject *uobj;
1157 if (copy_from_user(&cmd, buf, sizeof cmd))
1160 uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
1166 ret = ib_dereg_mr(mr);
1170 put_uobj_write(uobj);
1175 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
1177 mutex_lock(&file->mutex);
1178 list_del(&uobj->list);
1179 mutex_unlock(&file->mutex);
1186 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
1187 struct ib_device *ib_dev,
1188 const char __user *buf, int in_len,
1191 struct ib_uverbs_alloc_mw cmd;
1192 struct ib_uverbs_alloc_mw_resp resp;
1193 struct ib_uobject *uobj;
1198 if (out_len < sizeof(resp))
1201 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1204 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
1208 init_uobj(uobj, 0, file->ucontext, &mw_lock_class);
1209 down_write(&uobj->mutex);
1211 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1217 mw = pd->device->alloc_mw(pd, cmd.mw_type);
1223 mw->device = pd->device;
1226 atomic_inc(&pd->usecnt);
1229 ret = idr_add_uobj(&ib_uverbs_mw_idr, uobj);
1233 memset(&resp, 0, sizeof(resp));
1234 resp.rkey = mw->rkey;
1235 resp.mw_handle = uobj->id;
1237 if (copy_to_user((void __user *)(unsigned long)cmd.response,
1238 &resp, sizeof(resp))) {
1245 mutex_lock(&file->mutex);
1246 list_add_tail(&uobj->list, &file->ucontext->mw_list);
1247 mutex_unlock(&file->mutex);
1251 up_write(&uobj->mutex);
1256 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1265 put_uobj_write(uobj);
1269 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
1270 struct ib_device *ib_dev,
1271 const char __user *buf, int in_len,
1274 struct ib_uverbs_dealloc_mw cmd;
1276 struct ib_uobject *uobj;
1279 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1282 uobj = idr_write_uobj(&ib_uverbs_mw_idr, cmd.mw_handle, file->ucontext);
1288 ret = ib_dealloc_mw(mw);
1292 put_uobj_write(uobj);
1297 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
1299 mutex_lock(&file->mutex);
1300 list_del(&uobj->list);
1301 mutex_unlock(&file->mutex);
1308 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
1309 struct ib_device *ib_dev,
1310 const char __user *buf, int in_len,
1313 struct ib_uverbs_create_comp_channel cmd;
1314 struct ib_uverbs_create_comp_channel_resp resp;
1318 if (out_len < sizeof resp)
1321 if (copy_from_user(&cmd, buf, sizeof cmd))
1324 ret = get_unused_fd_flags(O_CLOEXEC);
1329 filp = ib_uverbs_alloc_event_file(file, ib_dev, 0);
1331 put_unused_fd(resp.fd);
1332 return PTR_ERR(filp);
1335 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1336 &resp, sizeof resp)) {
1337 put_unused_fd(resp.fd);
1342 fd_install(resp.fd, filp);
1346 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
1347 struct ib_device *ib_dev,
1348 struct ib_udata *ucore,
1349 struct ib_udata *uhw,
1350 struct ib_uverbs_ex_create_cq *cmd,
1352 int (*cb)(struct ib_uverbs_file *file,
1353 struct ib_ucq_object *obj,
1354 struct ib_uverbs_ex_create_cq_resp *resp,
1355 struct ib_udata *udata,
1359 struct ib_ucq_object *obj;
1360 struct ib_uverbs_event_file *ev_file = NULL;
1363 struct ib_uverbs_ex_create_cq_resp resp;
1364 struct ib_cq_init_attr attr = {};
1366 if (cmd->comp_vector >= file->device->num_comp_vectors)
1367 return ERR_PTR(-EINVAL);
1369 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1371 return ERR_PTR(-ENOMEM);
1373 init_uobj(&obj->uobject, cmd->user_handle, file->ucontext, &cq_lock_class);
1374 down_write(&obj->uobject.mutex);
1376 if (cmd->comp_channel >= 0) {
1377 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel);
1384 obj->uverbs_file = file;
1385 obj->comp_events_reported = 0;
1386 obj->async_events_reported = 0;
1387 INIT_LIST_HEAD(&obj->comp_list);
1388 INIT_LIST_HEAD(&obj->async_list);
1390 attr.cqe = cmd->cqe;
1391 attr.comp_vector = cmd->comp_vector;
1393 if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1394 attr.flags = cmd->flags;
1396 cq = ib_dev->create_cq(ib_dev, &attr,
1397 file->ucontext, uhw);
1403 cq->device = ib_dev;
1404 cq->uobject = &obj->uobject;
1405 cq->comp_handler = ib_uverbs_comp_handler;
1406 cq->event_handler = ib_uverbs_cq_event_handler;
1407 cq->cq_context = ev_file;
1408 atomic_set(&cq->usecnt, 0);
1410 obj->uobject.object = cq;
1411 ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1415 memset(&resp, 0, sizeof resp);
1416 resp.base.cq_handle = obj->uobject.id;
1417 resp.base.cqe = cq->cqe;
1419 resp.response_length = offsetof(typeof(resp), response_length) +
1420 sizeof(resp.response_length);
1422 ret = cb(file, obj, &resp, ucore, context);
1426 mutex_lock(&file->mutex);
1427 list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
1428 mutex_unlock(&file->mutex);
1430 obj->uobject.live = 1;
1432 up_write(&obj->uobject.mutex);
1437 idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
1444 ib_uverbs_release_ucq(file, ev_file, obj);
1447 put_uobj_write(&obj->uobject);
1449 return ERR_PTR(ret);
1452 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1453 struct ib_ucq_object *obj,
1454 struct ib_uverbs_ex_create_cq_resp *resp,
1455 struct ib_udata *ucore, void *context)
1457 if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1463 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1464 struct ib_device *ib_dev,
1465 const char __user *buf, int in_len,
1468 struct ib_uverbs_create_cq cmd;
1469 struct ib_uverbs_ex_create_cq cmd_ex;
1470 struct ib_uverbs_create_cq_resp resp;
1471 struct ib_udata ucore;
1472 struct ib_udata uhw;
1473 struct ib_ucq_object *obj;
1475 if (out_len < sizeof(resp))
1478 if (copy_from_user(&cmd, buf, sizeof(cmd)))
1481 INIT_UDATA(&ucore, buf, cmd.response, sizeof(cmd), sizeof(resp));
1483 INIT_UDATA(&uhw, buf + sizeof(cmd),
1484 (unsigned long)cmd.response + sizeof(resp),
1485 in_len - sizeof(cmd), out_len - sizeof(resp));
1487 memset(&cmd_ex, 0, sizeof(cmd_ex));
1488 cmd_ex.user_handle = cmd.user_handle;
1489 cmd_ex.cqe = cmd.cqe;
1490 cmd_ex.comp_vector = cmd.comp_vector;
1491 cmd_ex.comp_channel = cmd.comp_channel;
1493 obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1494 offsetof(typeof(cmd_ex), comp_channel) +
1495 sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1499 return PTR_ERR(obj);
1504 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1505 struct ib_ucq_object *obj,
1506 struct ib_uverbs_ex_create_cq_resp *resp,
1507 struct ib_udata *ucore, void *context)
1509 if (ib_copy_to_udata(ucore, resp, resp->response_length))
1515 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1516 struct ib_device *ib_dev,
1517 struct ib_udata *ucore,
1518 struct ib_udata *uhw)
1520 struct ib_uverbs_ex_create_cq_resp resp;
1521 struct ib_uverbs_ex_create_cq cmd;
1522 struct ib_ucq_object *obj;
1525 if (ucore->inlen < sizeof(cmd))
1528 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1538 if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1539 sizeof(resp.response_length)))
1542 obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1543 min(ucore->inlen, sizeof(cmd)),
1544 ib_uverbs_ex_create_cq_cb, NULL);
1547 return PTR_ERR(obj);
1552 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1553 struct ib_device *ib_dev,
1554 const char __user *buf, int in_len,
1557 struct ib_uverbs_resize_cq cmd;
1558 struct ib_uverbs_resize_cq_resp resp;
1559 struct ib_udata udata;
1563 if (copy_from_user(&cmd, buf, sizeof cmd))
1566 INIT_UDATA(&udata, buf + sizeof cmd,
1567 (unsigned long) cmd.response + sizeof resp,
1568 in_len - sizeof cmd, out_len - sizeof resp);
1570 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1574 ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1580 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1581 &resp, sizeof resp.cqe))
1587 return ret ? ret : in_len;
1590 static int copy_wc_to_user(void __user *dest, struct ib_wc *wc)
1592 struct ib_uverbs_wc tmp;
1594 tmp.wr_id = wc->wr_id;
1595 tmp.status = wc->status;
1596 tmp.opcode = wc->opcode;
1597 tmp.vendor_err = wc->vendor_err;
1598 tmp.byte_len = wc->byte_len;
1599 tmp.ex.imm_data = (__u32 __force) wc->ex.imm_data;
1600 tmp.qp_num = wc->qp->qp_num;
1601 tmp.src_qp = wc->src_qp;
1602 tmp.wc_flags = wc->wc_flags;
1603 tmp.pkey_index = wc->pkey_index;
1604 tmp.slid = wc->slid;
1606 tmp.dlid_path_bits = wc->dlid_path_bits;
1607 tmp.port_num = wc->port_num;
1610 if (copy_to_user(dest, &tmp, sizeof tmp))
1616 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1617 struct ib_device *ib_dev,
1618 const char __user *buf, int in_len,
1621 struct ib_uverbs_poll_cq cmd;
1622 struct ib_uverbs_poll_cq_resp resp;
1623 u8 __user *header_ptr;
1624 u8 __user *data_ptr;
1629 if (copy_from_user(&cmd, buf, sizeof cmd))
1632 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1636 /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1637 header_ptr = (void __user *)(unsigned long) cmd.response;
1638 data_ptr = header_ptr + sizeof resp;
1640 memset(&resp, 0, sizeof resp);
1641 while (resp.count < cmd.ne) {
1642 ret = ib_poll_cq(cq, 1, &wc);
1648 ret = copy_wc_to_user(data_ptr, &wc);
1652 data_ptr += sizeof(struct ib_uverbs_wc);
1656 if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1668 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1669 struct ib_device *ib_dev,
1670 const char __user *buf, int in_len,
1673 struct ib_uverbs_req_notify_cq cmd;
1676 if (copy_from_user(&cmd, buf, sizeof cmd))
1679 cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
1683 ib_req_notify_cq(cq, cmd.solicited_only ?
1684 IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1691 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1692 struct ib_device *ib_dev,
1693 const char __user *buf, int in_len,
1696 struct ib_uverbs_destroy_cq cmd;
1697 struct ib_uverbs_destroy_cq_resp resp;
1698 struct ib_uobject *uobj;
1700 struct ib_ucq_object *obj;
1701 struct ib_uverbs_event_file *ev_file;
1704 if (copy_from_user(&cmd, buf, sizeof cmd))
1707 uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
1711 ev_file = cq->cq_context;
1712 obj = container_of(cq->uobject, struct ib_ucq_object, uobject);
1714 ret = ib_destroy_cq(cq);
1718 put_uobj_write(uobj);
1723 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1725 mutex_lock(&file->mutex);
1726 list_del(&uobj->list);
1727 mutex_unlock(&file->mutex);
1729 ib_uverbs_release_ucq(file, ev_file, obj);
1731 memset(&resp, 0, sizeof resp);
1732 resp.comp_events_reported = obj->comp_events_reported;
1733 resp.async_events_reported = obj->async_events_reported;
1737 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1738 &resp, sizeof resp))
1744 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1745 struct ib_device *ib_dev,
1746 const char __user *buf, int in_len,
1749 struct ib_uverbs_create_qp cmd;
1750 struct ib_uverbs_create_qp_resp resp;
1751 struct ib_udata udata;
1752 struct ib_uqp_object *obj;
1753 struct ib_device *device;
1754 struct ib_pd *pd = NULL;
1755 struct ib_xrcd *xrcd = NULL;
1756 struct ib_uobject *uninitialized_var(xrcd_uobj);
1757 struct ib_cq *scq = NULL, *rcq = NULL;
1758 struct ib_srq *srq = NULL;
1760 struct ib_qp_init_attr attr;
1763 if (out_len < sizeof resp)
1766 if (copy_from_user(&cmd, buf, sizeof cmd))
1769 if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1772 INIT_UDATA(&udata, buf + sizeof cmd,
1773 (unsigned long) cmd.response + sizeof resp,
1774 in_len - sizeof cmd, out_len - sizeof resp);
1776 obj = kzalloc(sizeof *obj, GFP_KERNEL);
1780 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1781 down_write(&obj->uevent.uobject.mutex);
1783 if (cmd.qp_type == IB_QPT_XRC_TGT) {
1784 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1789 device = xrcd->device;
1791 if (cmd.qp_type == IB_QPT_XRC_INI) {
1792 cmd.max_recv_wr = cmd.max_recv_sge = 0;
1795 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1796 if (!srq || srq->srq_type != IB_SRQT_BASIC) {
1802 if (cmd.recv_cq_handle != cmd.send_cq_handle) {
1803 rcq = idr_read_cq(cmd.recv_cq_handle, file->ucontext, 0);
1811 scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, !!rcq);
1813 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1819 device = pd->device;
1822 attr.event_handler = ib_uverbs_qp_event_handler;
1823 attr.qp_context = file;
1828 attr.sq_sig_type = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1829 attr.qp_type = cmd.qp_type;
1830 attr.create_flags = 0;
1832 attr.cap.max_send_wr = cmd.max_send_wr;
1833 attr.cap.max_recv_wr = cmd.max_recv_wr;
1834 attr.cap.max_send_sge = cmd.max_send_sge;
1835 attr.cap.max_recv_sge = cmd.max_recv_sge;
1836 attr.cap.max_inline_data = cmd.max_inline_data;
1838 obj->uevent.events_reported = 0;
1839 INIT_LIST_HEAD(&obj->uevent.event_list);
1840 INIT_LIST_HEAD(&obj->mcast_list);
1842 if (cmd.qp_type == IB_QPT_XRC_TGT)
1843 qp = ib_create_qp(pd, &attr);
1845 qp = device->create_qp(pd, &attr, &udata);
1852 if (cmd.qp_type != IB_QPT_XRC_TGT) {
1854 qp->device = device;
1856 qp->send_cq = attr.send_cq;
1857 qp->recv_cq = attr.recv_cq;
1859 qp->event_handler = attr.event_handler;
1860 qp->qp_context = attr.qp_context;
1861 qp->qp_type = attr.qp_type;
1862 atomic_set(&qp->usecnt, 0);
1863 atomic_inc(&pd->usecnt);
1864 atomic_inc(&attr.send_cq->usecnt);
1866 atomic_inc(&attr.recv_cq->usecnt);
1868 atomic_inc(&attr.srq->usecnt);
1870 qp->uobject = &obj->uevent.uobject;
1872 obj->uevent.uobject.object = qp;
1873 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1877 memset(&resp, 0, sizeof resp);
1878 resp.qpn = qp->qp_num;
1879 resp.qp_handle = obj->uevent.uobject.id;
1880 resp.max_recv_sge = attr.cap.max_recv_sge;
1881 resp.max_send_sge = attr.cap.max_send_sge;
1882 resp.max_recv_wr = attr.cap.max_recv_wr;
1883 resp.max_send_wr = attr.cap.max_send_wr;
1884 resp.max_inline_data = attr.cap.max_inline_data;
1886 if (copy_to_user((void __user *) (unsigned long) cmd.response,
1887 &resp, sizeof resp)) {
1893 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1895 atomic_inc(&obj->uxrcd->refcnt);
1896 put_xrcd_read(xrcd_uobj);
1903 if (rcq && rcq != scq)
1908 mutex_lock(&file->mutex);
1909 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1910 mutex_unlock(&file->mutex);
1912 obj->uevent.uobject.live = 1;
1914 up_write(&obj->uevent.uobject.mutex);
1919 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1926 put_xrcd_read(xrcd_uobj);
1931 if (rcq && rcq != scq)
1936 put_uobj_write(&obj->uevent.uobject);
1940 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1941 struct ib_device *ib_dev,
1942 const char __user *buf, int in_len, int out_len)
1944 struct ib_uverbs_open_qp cmd;
1945 struct ib_uverbs_create_qp_resp resp;
1946 struct ib_udata udata;
1947 struct ib_uqp_object *obj;
1948 struct ib_xrcd *xrcd;
1949 struct ib_uobject *uninitialized_var(xrcd_uobj);
1951 struct ib_qp_open_attr attr;
1954 if (out_len < sizeof resp)
1957 if (copy_from_user(&cmd, buf, sizeof cmd))
1960 INIT_UDATA(&udata, buf + sizeof cmd,
1961 (unsigned long) cmd.response + sizeof resp,
1962 in_len - sizeof cmd, out_len - sizeof resp);
1964 obj = kmalloc(sizeof *obj, GFP_KERNEL);
1968 init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_class);
1969 down_write(&obj->uevent.uobject.mutex);
1971 xrcd = idr_read_xrcd(cmd.pd_handle, file->ucontext, &xrcd_uobj);
1977 attr.event_handler = ib_uverbs_qp_event_handler;
1978 attr.qp_context = file;
1979 attr.qp_num = cmd.qpn;
1980 attr.qp_type = cmd.qp_type;
1982 obj->uevent.events_reported = 0;
1983 INIT_LIST_HEAD(&obj->uevent.event_list);
1984 INIT_LIST_HEAD(&obj->mcast_list);
1986 qp = ib_open_qp(xrcd, &attr);
1992 qp->uobject = &obj->uevent.uobject;
1994 obj->uevent.uobject.object = qp;
1995 ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1999 memset(&resp, 0, sizeof resp);
2000 resp.qpn = qp->qp_num;
2001 resp.qp_handle = obj->uevent.uobject.id;
2003 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2004 &resp, sizeof resp)) {
2009 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
2010 atomic_inc(&obj->uxrcd->refcnt);
2011 put_xrcd_read(xrcd_uobj);
2013 mutex_lock(&file->mutex);
2014 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
2015 mutex_unlock(&file->mutex);
2017 obj->uevent.uobject.live = 1;
2019 up_write(&obj->uevent.uobject.mutex);
2024 idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
2030 put_xrcd_read(xrcd_uobj);
2031 put_uobj_write(&obj->uevent.uobject);
2035 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
2036 struct ib_device *ib_dev,
2037 const char __user *buf, int in_len,
2040 struct ib_uverbs_query_qp cmd;
2041 struct ib_uverbs_query_qp_resp resp;
2043 struct ib_qp_attr *attr;
2044 struct ib_qp_init_attr *init_attr;
2047 if (copy_from_user(&cmd, buf, sizeof cmd))
2050 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2051 init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
2052 if (!attr || !init_attr) {
2057 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2063 ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
2070 memset(&resp, 0, sizeof resp);
2072 resp.qp_state = attr->qp_state;
2073 resp.cur_qp_state = attr->cur_qp_state;
2074 resp.path_mtu = attr->path_mtu;
2075 resp.path_mig_state = attr->path_mig_state;
2076 resp.qkey = attr->qkey;
2077 resp.rq_psn = attr->rq_psn;
2078 resp.sq_psn = attr->sq_psn;
2079 resp.dest_qp_num = attr->dest_qp_num;
2080 resp.qp_access_flags = attr->qp_access_flags;
2081 resp.pkey_index = attr->pkey_index;
2082 resp.alt_pkey_index = attr->alt_pkey_index;
2083 resp.sq_draining = attr->sq_draining;
2084 resp.max_rd_atomic = attr->max_rd_atomic;
2085 resp.max_dest_rd_atomic = attr->max_dest_rd_atomic;
2086 resp.min_rnr_timer = attr->min_rnr_timer;
2087 resp.port_num = attr->port_num;
2088 resp.timeout = attr->timeout;
2089 resp.retry_cnt = attr->retry_cnt;
2090 resp.rnr_retry = attr->rnr_retry;
2091 resp.alt_port_num = attr->alt_port_num;
2092 resp.alt_timeout = attr->alt_timeout;
2094 memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
2095 resp.dest.flow_label = attr->ah_attr.grh.flow_label;
2096 resp.dest.sgid_index = attr->ah_attr.grh.sgid_index;
2097 resp.dest.hop_limit = attr->ah_attr.grh.hop_limit;
2098 resp.dest.traffic_class = attr->ah_attr.grh.traffic_class;
2099 resp.dest.dlid = attr->ah_attr.dlid;
2100 resp.dest.sl = attr->ah_attr.sl;
2101 resp.dest.src_path_bits = attr->ah_attr.src_path_bits;
2102 resp.dest.static_rate = attr->ah_attr.static_rate;
2103 resp.dest.is_global = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
2104 resp.dest.port_num = attr->ah_attr.port_num;
2106 memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
2107 resp.alt_dest.flow_label = attr->alt_ah_attr.grh.flow_label;
2108 resp.alt_dest.sgid_index = attr->alt_ah_attr.grh.sgid_index;
2109 resp.alt_dest.hop_limit = attr->alt_ah_attr.grh.hop_limit;
2110 resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
2111 resp.alt_dest.dlid = attr->alt_ah_attr.dlid;
2112 resp.alt_dest.sl = attr->alt_ah_attr.sl;
2113 resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
2114 resp.alt_dest.static_rate = attr->alt_ah_attr.static_rate;
2115 resp.alt_dest.is_global = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
2116 resp.alt_dest.port_num = attr->alt_ah_attr.port_num;
2118 resp.max_send_wr = init_attr->cap.max_send_wr;
2119 resp.max_recv_wr = init_attr->cap.max_recv_wr;
2120 resp.max_send_sge = init_attr->cap.max_send_sge;
2121 resp.max_recv_sge = init_attr->cap.max_recv_sge;
2122 resp.max_inline_data = init_attr->cap.max_inline_data;
2123 resp.sq_sig_all = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
2125 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2126 &resp, sizeof resp))
2133 return ret ? ret : in_len;
2136 /* Remove ignored fields set in the attribute mask */
2137 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
2140 case IB_QPT_XRC_INI:
2141 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
2142 case IB_QPT_XRC_TGT:
2143 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
2150 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2151 struct ib_device *ib_dev,
2152 const char __user *buf, int in_len,
2155 struct ib_uverbs_modify_qp cmd;
2156 struct ib_udata udata;
2158 struct ib_qp_attr *attr;
2161 if (copy_from_user(&cmd, buf, sizeof cmd))
2164 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2167 attr = kmalloc(sizeof *attr, GFP_KERNEL);
2171 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2177 attr->qp_state = cmd.qp_state;
2178 attr->cur_qp_state = cmd.cur_qp_state;
2179 attr->path_mtu = cmd.path_mtu;
2180 attr->path_mig_state = cmd.path_mig_state;
2181 attr->qkey = cmd.qkey;
2182 attr->rq_psn = cmd.rq_psn;
2183 attr->sq_psn = cmd.sq_psn;
2184 attr->dest_qp_num = cmd.dest_qp_num;
2185 attr->qp_access_flags = cmd.qp_access_flags;
2186 attr->pkey_index = cmd.pkey_index;
2187 attr->alt_pkey_index = cmd.alt_pkey_index;
2188 attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
2189 attr->max_rd_atomic = cmd.max_rd_atomic;
2190 attr->max_dest_rd_atomic = cmd.max_dest_rd_atomic;
2191 attr->min_rnr_timer = cmd.min_rnr_timer;
2192 attr->port_num = cmd.port_num;
2193 attr->timeout = cmd.timeout;
2194 attr->retry_cnt = cmd.retry_cnt;
2195 attr->rnr_retry = cmd.rnr_retry;
2196 attr->alt_port_num = cmd.alt_port_num;
2197 attr->alt_timeout = cmd.alt_timeout;
2199 memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
2200 attr->ah_attr.grh.flow_label = cmd.dest.flow_label;
2201 attr->ah_attr.grh.sgid_index = cmd.dest.sgid_index;
2202 attr->ah_attr.grh.hop_limit = cmd.dest.hop_limit;
2203 attr->ah_attr.grh.traffic_class = cmd.dest.traffic_class;
2204 attr->ah_attr.dlid = cmd.dest.dlid;
2205 attr->ah_attr.sl = cmd.dest.sl;
2206 attr->ah_attr.src_path_bits = cmd.dest.src_path_bits;
2207 attr->ah_attr.static_rate = cmd.dest.static_rate;
2208 attr->ah_attr.ah_flags = cmd.dest.is_global ? IB_AH_GRH : 0;
2209 attr->ah_attr.port_num = cmd.dest.port_num;
2211 memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
2212 attr->alt_ah_attr.grh.flow_label = cmd.alt_dest.flow_label;
2213 attr->alt_ah_attr.grh.sgid_index = cmd.alt_dest.sgid_index;
2214 attr->alt_ah_attr.grh.hop_limit = cmd.alt_dest.hop_limit;
2215 attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
2216 attr->alt_ah_attr.dlid = cmd.alt_dest.dlid;
2217 attr->alt_ah_attr.sl = cmd.alt_dest.sl;
2218 attr->alt_ah_attr.src_path_bits = cmd.alt_dest.src_path_bits;
2219 attr->alt_ah_attr.static_rate = cmd.alt_dest.static_rate;
2220 attr->alt_ah_attr.ah_flags = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
2221 attr->alt_ah_attr.port_num = cmd.alt_dest.port_num;
2223 if (qp->real_qp == qp) {
2224 ret = ib_resolve_eth_l2_attrs(qp, attr, &cmd.attr_mask);
2227 ret = qp->device->modify_qp(qp, attr,
2228 modify_qp_mask(qp->qp_type, cmd.attr_mask), &udata);
2230 ret = ib_modify_qp(qp, attr, modify_qp_mask(qp->qp_type, cmd.attr_mask));
2247 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2248 struct ib_device *ib_dev,
2249 const char __user *buf, int in_len,
2252 struct ib_uverbs_destroy_qp cmd;
2253 struct ib_uverbs_destroy_qp_resp resp;
2254 struct ib_uobject *uobj;
2256 struct ib_uqp_object *obj;
2259 if (copy_from_user(&cmd, buf, sizeof cmd))
2262 memset(&resp, 0, sizeof resp);
2264 uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
2268 obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2270 if (!list_empty(&obj->mcast_list)) {
2271 put_uobj_write(uobj);
2275 ret = ib_destroy_qp(qp);
2279 put_uobj_write(uobj);
2285 atomic_dec(&obj->uxrcd->refcnt);
2287 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
2289 mutex_lock(&file->mutex);
2290 list_del(&uobj->list);
2291 mutex_unlock(&file->mutex);
2293 ib_uverbs_release_uevent(file, &obj->uevent);
2295 resp.events_reported = obj->uevent.events_reported;
2299 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2300 &resp, sizeof resp))
2306 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2307 struct ib_device *ib_dev,
2308 const char __user *buf, int in_len,
2311 struct ib_uverbs_post_send cmd;
2312 struct ib_uverbs_post_send_resp resp;
2313 struct ib_uverbs_send_wr *user_wr;
2314 struct ib_send_wr *wr = NULL, *last, *next, *bad_wr;
2318 ssize_t ret = -EINVAL;
2320 if (copy_from_user(&cmd, buf, sizeof cmd))
2323 if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2324 cmd.sge_count * sizeof (struct ib_uverbs_sge))
2327 if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2330 user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2334 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2338 is_ud = qp->qp_type == IB_QPT_UD;
2341 for (i = 0; i < cmd.wr_count; ++i) {
2342 if (copy_from_user(user_wr,
2343 buf + sizeof cmd + i * cmd.wqe_size,
2349 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2354 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2355 user_wr->num_sge * sizeof (struct ib_sge),
2369 next->wr_id = user_wr->wr_id;
2370 next->num_sge = user_wr->num_sge;
2371 next->opcode = user_wr->opcode;
2372 next->send_flags = user_wr->send_flags;
2375 if (next->opcode != IB_WR_SEND &&
2376 next->opcode != IB_WR_SEND_WITH_IMM) {
2381 next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
2383 if (!next->wr.ud.ah) {
2387 next->wr.ud.remote_qpn = user_wr->wr.ud.remote_qpn;
2388 next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
2389 if (next->opcode == IB_WR_SEND_WITH_IMM)
2391 (__be32 __force) user_wr->ex.imm_data;
2393 switch (next->opcode) {
2394 case IB_WR_RDMA_WRITE_WITH_IMM:
2396 (__be32 __force) user_wr->ex.imm_data;
2397 case IB_WR_RDMA_WRITE:
2398 case IB_WR_RDMA_READ:
2399 next->wr.rdma.remote_addr =
2400 user_wr->wr.rdma.remote_addr;
2401 next->wr.rdma.rkey =
2402 user_wr->wr.rdma.rkey;
2404 case IB_WR_SEND_WITH_IMM:
2406 (__be32 __force) user_wr->ex.imm_data;
2408 case IB_WR_SEND_WITH_INV:
2409 next->ex.invalidate_rkey =
2410 user_wr->ex.invalidate_rkey;
2412 case IB_WR_ATOMIC_CMP_AND_SWP:
2413 case IB_WR_ATOMIC_FETCH_AND_ADD:
2414 next->wr.atomic.remote_addr =
2415 user_wr->wr.atomic.remote_addr;
2416 next->wr.atomic.compare_add =
2417 user_wr->wr.atomic.compare_add;
2418 next->wr.atomic.swap = user_wr->wr.atomic.swap;
2419 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
2428 if (next->num_sge) {
2429 next->sg_list = (void *) next +
2430 ALIGN(sizeof *next, sizeof (struct ib_sge));
2431 if (copy_from_user(next->sg_list,
2433 cmd.wr_count * cmd.wqe_size +
2434 sg_ind * sizeof (struct ib_sge),
2435 next->num_sge * sizeof (struct ib_sge))) {
2439 sg_ind += next->num_sge;
2441 next->sg_list = NULL;
2445 ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2447 for (next = wr; next; next = next->next) {
2453 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2454 &resp, sizeof resp))
2461 if (is_ud && wr->wr.ud.ah)
2462 put_ah_read(wr->wr.ud.ah);
2471 return ret ? ret : in_len;
2474 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2480 struct ib_uverbs_recv_wr *user_wr;
2481 struct ib_recv_wr *wr = NULL, *last, *next;
2486 if (in_len < wqe_size * wr_count +
2487 sge_count * sizeof (struct ib_uverbs_sge))
2488 return ERR_PTR(-EINVAL);
2490 if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2491 return ERR_PTR(-EINVAL);
2493 user_wr = kmalloc(wqe_size, GFP_KERNEL);
2495 return ERR_PTR(-ENOMEM);
2499 for (i = 0; i < wr_count; ++i) {
2500 if (copy_from_user(user_wr, buf + i * wqe_size,
2506 if (user_wr->num_sge + sg_ind > sge_count) {
2511 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2512 user_wr->num_sge * sizeof (struct ib_sge),
2526 next->wr_id = user_wr->wr_id;
2527 next->num_sge = user_wr->num_sge;
2529 if (next->num_sge) {
2530 next->sg_list = (void *) next +
2531 ALIGN(sizeof *next, sizeof (struct ib_sge));
2532 if (copy_from_user(next->sg_list,
2533 buf + wr_count * wqe_size +
2534 sg_ind * sizeof (struct ib_sge),
2535 next->num_sge * sizeof (struct ib_sge))) {
2539 sg_ind += next->num_sge;
2541 next->sg_list = NULL;
2556 return ERR_PTR(ret);
2559 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2560 struct ib_device *ib_dev,
2561 const char __user *buf, int in_len,
2564 struct ib_uverbs_post_recv cmd;
2565 struct ib_uverbs_post_recv_resp resp;
2566 struct ib_recv_wr *wr, *next, *bad_wr;
2568 ssize_t ret = -EINVAL;
2570 if (copy_from_user(&cmd, buf, sizeof cmd))
2573 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2574 in_len - sizeof cmd, cmd.wr_count,
2575 cmd.sge_count, cmd.wqe_size);
2579 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2584 ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2589 for (next = wr; next; next = next->next) {
2595 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2596 &resp, sizeof resp))
2606 return ret ? ret : in_len;
2609 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2610 struct ib_device *ib_dev,
2611 const char __user *buf, int in_len,
2614 struct ib_uverbs_post_srq_recv cmd;
2615 struct ib_uverbs_post_srq_recv_resp resp;
2616 struct ib_recv_wr *wr, *next, *bad_wr;
2618 ssize_t ret = -EINVAL;
2620 if (copy_from_user(&cmd, buf, sizeof cmd))
2623 wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2624 in_len - sizeof cmd, cmd.wr_count,
2625 cmd.sge_count, cmd.wqe_size);
2629 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2634 ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2639 for (next = wr; next; next = next->next) {
2645 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2646 &resp, sizeof resp))
2656 return ret ? ret : in_len;
2659 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2660 struct ib_device *ib_dev,
2661 const char __user *buf, int in_len,
2664 struct ib_uverbs_create_ah cmd;
2665 struct ib_uverbs_create_ah_resp resp;
2666 struct ib_uobject *uobj;
2669 struct ib_ah_attr attr;
2672 if (out_len < sizeof resp)
2675 if (copy_from_user(&cmd, buf, sizeof cmd))
2678 uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
2682 init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_class);
2683 down_write(&uobj->mutex);
2685 pd = idr_read_pd(cmd.pd_handle, file->ucontext);
2691 attr.dlid = cmd.attr.dlid;
2692 attr.sl = cmd.attr.sl;
2693 attr.src_path_bits = cmd.attr.src_path_bits;
2694 attr.static_rate = cmd.attr.static_rate;
2695 attr.ah_flags = cmd.attr.is_global ? IB_AH_GRH : 0;
2696 attr.port_num = cmd.attr.port_num;
2697 attr.grh.flow_label = cmd.attr.grh.flow_label;
2698 attr.grh.sgid_index = cmd.attr.grh.sgid_index;
2699 attr.grh.hop_limit = cmd.attr.grh.hop_limit;
2700 attr.grh.traffic_class = cmd.attr.grh.traffic_class;
2702 memset(&attr.dmac, 0, sizeof(attr.dmac));
2703 memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
2705 ah = ib_create_ah(pd, &attr);
2714 ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
2718 resp.ah_handle = uobj->id;
2720 if (copy_to_user((void __user *) (unsigned long) cmd.response,
2721 &resp, sizeof resp)) {
2728 mutex_lock(&file->mutex);
2729 list_add_tail(&uobj->list, &file->ucontext->ah_list);
2730 mutex_unlock(&file->mutex);
2734 up_write(&uobj->mutex);
2739 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2748 put_uobj_write(uobj);
2752 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2753 struct ib_device *ib_dev,
2754 const char __user *buf, int in_len, int out_len)
2756 struct ib_uverbs_destroy_ah cmd;
2758 struct ib_uobject *uobj;
2761 if (copy_from_user(&cmd, buf, sizeof cmd))
2764 uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
2769 ret = ib_destroy_ah(ah);
2773 put_uobj_write(uobj);
2778 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
2780 mutex_lock(&file->mutex);
2781 list_del(&uobj->list);
2782 mutex_unlock(&file->mutex);
2789 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2790 struct ib_device *ib_dev,
2791 const char __user *buf, int in_len,
2794 struct ib_uverbs_attach_mcast cmd;
2796 struct ib_uqp_object *obj;
2797 struct ib_uverbs_mcast_entry *mcast;
2800 if (copy_from_user(&cmd, buf, sizeof cmd))
2803 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2807 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2809 list_for_each_entry(mcast, &obj->mcast_list, list)
2810 if (cmd.mlid == mcast->lid &&
2811 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2816 mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2822 mcast->lid = cmd.mlid;
2823 memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2825 ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2827 list_add_tail(&mcast->list, &obj->mcast_list);
2834 return ret ? ret : in_len;
2837 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2838 struct ib_device *ib_dev,
2839 const char __user *buf, int in_len,
2842 struct ib_uverbs_detach_mcast cmd;
2843 struct ib_uqp_object *obj;
2845 struct ib_uverbs_mcast_entry *mcast;
2848 if (copy_from_user(&cmd, buf, sizeof cmd))
2851 qp = idr_write_qp(cmd.qp_handle, file->ucontext);
2855 ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
2859 obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2861 list_for_each_entry(mcast, &obj->mcast_list, list)
2862 if (cmd.mlid == mcast->lid &&
2863 !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2864 list_del(&mcast->list);
2872 return ret ? ret : in_len;
2875 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2876 union ib_flow_spec *ib_spec)
2878 if (kern_spec->reserved)
2881 ib_spec->type = kern_spec->type;
2883 switch (ib_spec->type) {
2884 case IB_FLOW_SPEC_ETH:
2885 ib_spec->eth.size = sizeof(struct ib_flow_spec_eth);
2886 if (ib_spec->eth.size != kern_spec->eth.size)
2888 memcpy(&ib_spec->eth.val, &kern_spec->eth.val,
2889 sizeof(struct ib_flow_eth_filter));
2890 memcpy(&ib_spec->eth.mask, &kern_spec->eth.mask,
2891 sizeof(struct ib_flow_eth_filter));
2893 case IB_FLOW_SPEC_IPV4:
2894 ib_spec->ipv4.size = sizeof(struct ib_flow_spec_ipv4);
2895 if (ib_spec->ipv4.size != kern_spec->ipv4.size)
2897 memcpy(&ib_spec->ipv4.val, &kern_spec->ipv4.val,
2898 sizeof(struct ib_flow_ipv4_filter));
2899 memcpy(&ib_spec->ipv4.mask, &kern_spec->ipv4.mask,
2900 sizeof(struct ib_flow_ipv4_filter));
2902 case IB_FLOW_SPEC_TCP:
2903 case IB_FLOW_SPEC_UDP:
2904 ib_spec->tcp_udp.size = sizeof(struct ib_flow_spec_tcp_udp);
2905 if (ib_spec->tcp_udp.size != kern_spec->tcp_udp.size)
2907 memcpy(&ib_spec->tcp_udp.val, &kern_spec->tcp_udp.val,
2908 sizeof(struct ib_flow_tcp_udp_filter));
2909 memcpy(&ib_spec->tcp_udp.mask, &kern_spec->tcp_udp.mask,
2910 sizeof(struct ib_flow_tcp_udp_filter));
2918 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
2919 struct ib_device *ib_dev,
2920 struct ib_udata *ucore,
2921 struct ib_udata *uhw)
2923 struct ib_uverbs_create_flow cmd;
2924 struct ib_uverbs_create_flow_resp resp;
2925 struct ib_uobject *uobj;
2926 struct ib_flow *flow_id;
2927 struct ib_uverbs_flow_attr *kern_flow_attr;
2928 struct ib_flow_attr *flow_attr;
2935 if (ucore->inlen < sizeof(cmd))
2938 if (ucore->outlen < sizeof(resp))
2941 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
2945 ucore->inbuf += sizeof(cmd);
2946 ucore->inlen -= sizeof(cmd);
2951 if ((cmd.flow_attr.type == IB_FLOW_ATTR_SNIFFER &&
2952 !capable(CAP_NET_ADMIN)) || !capable(CAP_NET_RAW))
2955 if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
2958 if (cmd.flow_attr.size > ucore->inlen ||
2959 cmd.flow_attr.size >
2960 (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
2963 if (cmd.flow_attr.reserved[0] ||
2964 cmd.flow_attr.reserved[1])
2967 if (cmd.flow_attr.num_of_specs) {
2968 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
2970 if (!kern_flow_attr)
2973 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
2974 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
2975 cmd.flow_attr.size);
2979 kern_flow_attr = &cmd.flow_attr;
2982 uobj = kmalloc(sizeof(*uobj), GFP_KERNEL);
2987 init_uobj(uobj, 0, file->ucontext, &rule_lock_class);
2988 down_write(&uobj->mutex);
2990 qp = idr_read_qp(cmd.qp_handle, file->ucontext);
2996 flow_attr = kmalloc(sizeof(*flow_attr) + cmd.flow_attr.size, GFP_KERNEL);
3002 flow_attr->type = kern_flow_attr->type;
3003 flow_attr->priority = kern_flow_attr->priority;
3004 flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3005 flow_attr->port = kern_flow_attr->port;
3006 flow_attr->flags = kern_flow_attr->flags;
3007 flow_attr->size = sizeof(*flow_attr);
3009 kern_spec = kern_flow_attr + 1;
3010 ib_spec = flow_attr + 1;
3011 for (i = 0; i < flow_attr->num_of_specs &&
3012 cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3013 cmd.flow_attr.size >=
3014 ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3015 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3019 ((union ib_flow_spec *) ib_spec)->size;
3020 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3021 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3022 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3024 if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3025 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3026 i, cmd.flow_attr.size);
3030 flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3031 if (IS_ERR(flow_id)) {
3032 err = PTR_ERR(flow_id);
3036 flow_id->uobject = uobj;
3037 uobj->object = flow_id;
3039 err = idr_add_uobj(&ib_uverbs_rule_idr, uobj);
3043 memset(&resp, 0, sizeof(resp));
3044 resp.flow_handle = uobj->id;
3046 err = ib_copy_to_udata(ucore,
3047 &resp, sizeof(resp));
3052 mutex_lock(&file->mutex);
3053 list_add_tail(&uobj->list, &file->ucontext->rule_list);
3054 mutex_unlock(&file->mutex);
3058 up_write(&uobj->mutex);
3060 if (cmd.flow_attr.num_of_specs)
3061 kfree(kern_flow_attr);
3064 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3066 ib_destroy_flow(flow_id);
3072 put_uobj_write(uobj);
3074 if (cmd.flow_attr.num_of_specs)
3075 kfree(kern_flow_attr);
3079 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3080 struct ib_device *ib_dev,
3081 struct ib_udata *ucore,
3082 struct ib_udata *uhw)
3084 struct ib_uverbs_destroy_flow cmd;
3085 struct ib_flow *flow_id;
3086 struct ib_uobject *uobj;
3089 if (ucore->inlen < sizeof(cmd))
3092 ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3099 uobj = idr_write_uobj(&ib_uverbs_rule_idr, cmd.flow_handle,
3103 flow_id = uobj->object;
3105 ret = ib_destroy_flow(flow_id);
3109 put_uobj_write(uobj);
3111 idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
3113 mutex_lock(&file->mutex);
3114 list_del(&uobj->list);
3115 mutex_unlock(&file->mutex);
3122 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3123 struct ib_device *ib_dev,
3124 struct ib_uverbs_create_xsrq *cmd,
3125 struct ib_udata *udata)
3127 struct ib_uverbs_create_srq_resp resp;
3128 struct ib_usrq_object *obj;
3131 struct ib_uobject *uninitialized_var(xrcd_uobj);
3132 struct ib_srq_init_attr attr;
3135 obj = kmalloc(sizeof *obj, GFP_KERNEL);
3139 init_uobj(&obj->uevent.uobject, cmd->user_handle, file->ucontext, &srq_lock_class);
3140 down_write(&obj->uevent.uobject.mutex);
3142 if (cmd->srq_type == IB_SRQT_XRC) {
3143 attr.ext.xrc.xrcd = idr_read_xrcd(cmd->xrcd_handle, file->ucontext, &xrcd_uobj);
3144 if (!attr.ext.xrc.xrcd) {
3149 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3150 atomic_inc(&obj->uxrcd->refcnt);
3152 attr.ext.xrc.cq = idr_read_cq(cmd->cq_handle, file->ucontext, 0);
3153 if (!attr.ext.xrc.cq) {
3159 pd = idr_read_pd(cmd->pd_handle, file->ucontext);
3165 attr.event_handler = ib_uverbs_srq_event_handler;
3166 attr.srq_context = file;
3167 attr.srq_type = cmd->srq_type;
3168 attr.attr.max_wr = cmd->max_wr;
3169 attr.attr.max_sge = cmd->max_sge;
3170 attr.attr.srq_limit = cmd->srq_limit;
3172 obj->uevent.events_reported = 0;
3173 INIT_LIST_HEAD(&obj->uevent.event_list);
3175 srq = pd->device->create_srq(pd, &attr, udata);
3181 srq->device = pd->device;
3183 srq->srq_type = cmd->srq_type;
3184 srq->uobject = &obj->uevent.uobject;
3185 srq->event_handler = attr.event_handler;
3186 srq->srq_context = attr.srq_context;
3188 if (cmd->srq_type == IB_SRQT_XRC) {
3189 srq->ext.xrc.cq = attr.ext.xrc.cq;
3190 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3191 atomic_inc(&attr.ext.xrc.cq->usecnt);
3192 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3195 atomic_inc(&pd->usecnt);
3196 atomic_set(&srq->usecnt, 0);
3198 obj->uevent.uobject.object = srq;
3199 ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3203 memset(&resp, 0, sizeof resp);
3204 resp.srq_handle = obj->uevent.uobject.id;
3205 resp.max_wr = attr.attr.max_wr;
3206 resp.max_sge = attr.attr.max_sge;
3207 if (cmd->srq_type == IB_SRQT_XRC)
3208 resp.srqn = srq->ext.xrc.srq_num;
3210 if (copy_to_user((void __user *) (unsigned long) cmd->response,
3211 &resp, sizeof resp)) {
3216 if (cmd->srq_type == IB_SRQT_XRC) {
3217 put_uobj_read(xrcd_uobj);
3218 put_cq_read(attr.ext.xrc.cq);
3222 mutex_lock(&file->mutex);
3223 list_add_tail(&obj->uevent.uobject.list, &file->ucontext->srq_list);
3224 mutex_unlock(&file->mutex);
3226 obj->uevent.uobject.live = 1;
3228 up_write(&obj->uevent.uobject.mutex);
3233 idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uevent.uobject);
3236 ib_destroy_srq(srq);
3242 if (cmd->srq_type == IB_SRQT_XRC)
3243 put_cq_read(attr.ext.xrc.cq);
3246 if (cmd->srq_type == IB_SRQT_XRC) {
3247 atomic_dec(&obj->uxrcd->refcnt);
3248 put_uobj_read(xrcd_uobj);
3252 put_uobj_write(&obj->uevent.uobject);
3256 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3257 struct ib_device *ib_dev,
3258 const char __user *buf, int in_len,
3261 struct ib_uverbs_create_srq cmd;
3262 struct ib_uverbs_create_xsrq xcmd;
3263 struct ib_uverbs_create_srq_resp resp;
3264 struct ib_udata udata;
3267 if (out_len < sizeof resp)
3270 if (copy_from_user(&cmd, buf, sizeof cmd))
3273 xcmd.response = cmd.response;
3274 xcmd.user_handle = cmd.user_handle;
3275 xcmd.srq_type = IB_SRQT_BASIC;
3276 xcmd.pd_handle = cmd.pd_handle;
3277 xcmd.max_wr = cmd.max_wr;
3278 xcmd.max_sge = cmd.max_sge;
3279 xcmd.srq_limit = cmd.srq_limit;
3281 INIT_UDATA(&udata, buf + sizeof cmd,
3282 (unsigned long) cmd.response + sizeof resp,
3283 in_len - sizeof cmd, out_len - sizeof resp);
3285 ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3292 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3293 struct ib_device *ib_dev,
3294 const char __user *buf, int in_len, int out_len)
3296 struct ib_uverbs_create_xsrq cmd;
3297 struct ib_uverbs_create_srq_resp resp;
3298 struct ib_udata udata;
3301 if (out_len < sizeof resp)
3304 if (copy_from_user(&cmd, buf, sizeof cmd))
3307 INIT_UDATA(&udata, buf + sizeof cmd,
3308 (unsigned long) cmd.response + sizeof resp,
3309 in_len - sizeof cmd, out_len - sizeof resp);
3311 ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3318 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3319 struct ib_device *ib_dev,
3320 const char __user *buf, int in_len,
3323 struct ib_uverbs_modify_srq cmd;
3324 struct ib_udata udata;
3326 struct ib_srq_attr attr;
3329 if (copy_from_user(&cmd, buf, sizeof cmd))
3332 INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3335 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3339 attr.max_wr = cmd.max_wr;
3340 attr.srq_limit = cmd.srq_limit;
3342 ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3346 return ret ? ret : in_len;
3349 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3350 struct ib_device *ib_dev,
3351 const char __user *buf,
3352 int in_len, int out_len)
3354 struct ib_uverbs_query_srq cmd;
3355 struct ib_uverbs_query_srq_resp resp;
3356 struct ib_srq_attr attr;
3360 if (out_len < sizeof resp)
3363 if (copy_from_user(&cmd, buf, sizeof cmd))
3366 srq = idr_read_srq(cmd.srq_handle, file->ucontext);
3370 ret = ib_query_srq(srq, &attr);
3377 memset(&resp, 0, sizeof resp);
3379 resp.max_wr = attr.max_wr;
3380 resp.max_sge = attr.max_sge;
3381 resp.srq_limit = attr.srq_limit;
3383 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3384 &resp, sizeof resp))
3390 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3391 struct ib_device *ib_dev,
3392 const char __user *buf, int in_len,
3395 struct ib_uverbs_destroy_srq cmd;
3396 struct ib_uverbs_destroy_srq_resp resp;
3397 struct ib_uobject *uobj;
3399 struct ib_uevent_object *obj;
3401 struct ib_usrq_object *us;
3402 enum ib_srq_type srq_type;
3404 if (copy_from_user(&cmd, buf, sizeof cmd))
3407 uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
3411 obj = container_of(uobj, struct ib_uevent_object, uobject);
3412 srq_type = srq->srq_type;
3414 ret = ib_destroy_srq(srq);
3418 put_uobj_write(uobj);
3423 if (srq_type == IB_SRQT_XRC) {
3424 us = container_of(obj, struct ib_usrq_object, uevent);
3425 atomic_dec(&us->uxrcd->refcnt);
3428 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
3430 mutex_lock(&file->mutex);
3431 list_del(&uobj->list);
3432 mutex_unlock(&file->mutex);
3434 ib_uverbs_release_uevent(file, obj);
3436 memset(&resp, 0, sizeof resp);
3437 resp.events_reported = obj->events_reported;
3441 if (copy_to_user((void __user *) (unsigned long) cmd.response,
3442 &resp, sizeof resp))
3445 return ret ? ret : in_len;
3448 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3449 struct ib_device *ib_dev,
3450 struct ib_udata *ucore,
3451 struct ib_udata *uhw)
3453 struct ib_uverbs_ex_query_device_resp resp;
3454 struct ib_uverbs_ex_query_device cmd;
3455 struct ib_device_attr attr;
3458 if (ucore->inlen < sizeof(cmd))
3461 err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3471 resp.response_length = offsetof(typeof(resp), odp_caps);
3473 if (ucore->outlen < resp.response_length)
3476 memset(&attr, 0, sizeof(attr));
3478 err = ib_dev->query_device(ib_dev, &attr, uhw);
3482 copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3485 if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3488 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3489 resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3490 resp.odp_caps.per_transport_caps.rc_odp_caps =
3491 attr.odp_caps.per_transport_caps.rc_odp_caps;
3492 resp.odp_caps.per_transport_caps.uc_odp_caps =
3493 attr.odp_caps.per_transport_caps.uc_odp_caps;
3494 resp.odp_caps.per_transport_caps.ud_odp_caps =
3495 attr.odp_caps.per_transport_caps.ud_odp_caps;
3496 resp.odp_caps.reserved = 0;
3498 memset(&resp.odp_caps, 0, sizeof(resp.odp_caps));
3500 resp.response_length += sizeof(resp.odp_caps);
3502 if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3505 resp.timestamp_mask = attr.timestamp_mask;
3506 resp.response_length += sizeof(resp.timestamp_mask);
3508 if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3511 resp.hca_core_clock = attr.hca_core_clock;
3512 resp.response_length += sizeof(resp.hca_core_clock);
3515 err = ib_copy_to_udata(ucore, &resp, resp.response_length);