2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
5 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
6 * Copyright (c) 2005 PathScale, Inc. All rights reserved.
8 * This software is available to you under a choice of one of two
9 * licenses. You may choose to be licensed under the terms of the GNU
10 * General Public License (GPL) Version 2, available from the file
11 * COPYING in the main directory of this source tree, or the
12 * OpenIB.org BSD license below:
14 * Redistribution and use in source and binary forms, with or
15 * without modification, are permitted provided that the following
18 * - Redistributions of source code must retain the above
19 * copyright notice, this list of conditions and the following
22 * - Redistributions in binary form must reproduce the above
23 * copyright notice, this list of conditions and the following
24 * disclaimer in the documentation and/or other materials
25 * provided with the distribution.
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/device.h>
40 #include <linux/err.h>
42 #include <linux/poll.h>
43 #include <linux/sched.h>
44 #include <linux/file.h>
45 #include <linux/mount.h>
47 #include <asm/uaccess.h>
51 MODULE_AUTHOR("Roland Dreier");
52 MODULE_DESCRIPTION("InfiniBand userspace verbs access");
53 MODULE_LICENSE("Dual BSD/GPL");
55 #define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */
58 IB_UVERBS_MAJOR
= 231,
59 IB_UVERBS_BASE_MINOR
= 192,
60 IB_UVERBS_MAX_DEVICES
= 32
63 #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
65 static struct class *uverbs_class
;
67 DEFINE_SPINLOCK(ib_uverbs_idr_lock
);
68 DEFINE_IDR(ib_uverbs_pd_idr
);
69 DEFINE_IDR(ib_uverbs_mr_idr
);
70 DEFINE_IDR(ib_uverbs_mw_idr
);
71 DEFINE_IDR(ib_uverbs_ah_idr
);
72 DEFINE_IDR(ib_uverbs_cq_idr
);
73 DEFINE_IDR(ib_uverbs_qp_idr
);
74 DEFINE_IDR(ib_uverbs_srq_idr
);
76 static DEFINE_SPINLOCK(map_lock
);
77 static DECLARE_BITMAP(dev_map
, IB_UVERBS_MAX_DEVICES
);
79 static ssize_t (*uverbs_cmd_table
[])(struct ib_uverbs_file
*file
,
80 const char __user
*buf
, int in_len
,
82 [IB_USER_VERBS_CMD_GET_CONTEXT
] = ib_uverbs_get_context
,
83 [IB_USER_VERBS_CMD_QUERY_DEVICE
] = ib_uverbs_query_device
,
84 [IB_USER_VERBS_CMD_QUERY_PORT
] = ib_uverbs_query_port
,
85 [IB_USER_VERBS_CMD_ALLOC_PD
] = ib_uverbs_alloc_pd
,
86 [IB_USER_VERBS_CMD_DEALLOC_PD
] = ib_uverbs_dealloc_pd
,
87 [IB_USER_VERBS_CMD_REG_MR
] = ib_uverbs_reg_mr
,
88 [IB_USER_VERBS_CMD_DEREG_MR
] = ib_uverbs_dereg_mr
,
89 [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL
] = ib_uverbs_create_comp_channel
,
90 [IB_USER_VERBS_CMD_CREATE_CQ
] = ib_uverbs_create_cq
,
91 [IB_USER_VERBS_CMD_RESIZE_CQ
] = ib_uverbs_resize_cq
,
92 [IB_USER_VERBS_CMD_POLL_CQ
] = ib_uverbs_poll_cq
,
93 [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ
] = ib_uverbs_req_notify_cq
,
94 [IB_USER_VERBS_CMD_DESTROY_CQ
] = ib_uverbs_destroy_cq
,
95 [IB_USER_VERBS_CMD_CREATE_QP
] = ib_uverbs_create_qp
,
96 [IB_USER_VERBS_CMD_QUERY_QP
] = ib_uverbs_query_qp
,
97 [IB_USER_VERBS_CMD_MODIFY_QP
] = ib_uverbs_modify_qp
,
98 [IB_USER_VERBS_CMD_DESTROY_QP
] = ib_uverbs_destroy_qp
,
99 [IB_USER_VERBS_CMD_POST_SEND
] = ib_uverbs_post_send
,
100 [IB_USER_VERBS_CMD_POST_RECV
] = ib_uverbs_post_recv
,
101 [IB_USER_VERBS_CMD_POST_SRQ_RECV
] = ib_uverbs_post_srq_recv
,
102 [IB_USER_VERBS_CMD_CREATE_AH
] = ib_uverbs_create_ah
,
103 [IB_USER_VERBS_CMD_DESTROY_AH
] = ib_uverbs_destroy_ah
,
104 [IB_USER_VERBS_CMD_ATTACH_MCAST
] = ib_uverbs_attach_mcast
,
105 [IB_USER_VERBS_CMD_DETACH_MCAST
] = ib_uverbs_detach_mcast
,
106 [IB_USER_VERBS_CMD_CREATE_SRQ
] = ib_uverbs_create_srq
,
107 [IB_USER_VERBS_CMD_MODIFY_SRQ
] = ib_uverbs_modify_srq
,
108 [IB_USER_VERBS_CMD_QUERY_SRQ
] = ib_uverbs_query_srq
,
109 [IB_USER_VERBS_CMD_DESTROY_SRQ
] = ib_uverbs_destroy_srq
,
112 static struct vfsmount
*uverbs_event_mnt
;
114 static void ib_uverbs_add_one(struct ib_device
*device
);
115 static void ib_uverbs_remove_one(struct ib_device
*device
);
117 static void ib_uverbs_release_dev(struct kref
*ref
)
119 struct ib_uverbs_device
*dev
=
120 container_of(ref
, struct ib_uverbs_device
, ref
);
122 complete(&dev
->comp
);
125 static void ib_uverbs_release_event_file(struct kref
*ref
)
127 struct ib_uverbs_event_file
*file
=
128 container_of(ref
, struct ib_uverbs_event_file
, ref
);
133 void ib_uverbs_release_ucq(struct ib_uverbs_file
*file
,
134 struct ib_uverbs_event_file
*ev_file
,
135 struct ib_ucq_object
*uobj
)
137 struct ib_uverbs_event
*evt
, *tmp
;
140 spin_lock_irq(&ev_file
->lock
);
141 list_for_each_entry_safe(evt
, tmp
, &uobj
->comp_list
, obj_list
) {
142 list_del(&evt
->list
);
145 spin_unlock_irq(&ev_file
->lock
);
147 kref_put(&ev_file
->ref
, ib_uverbs_release_event_file
);
150 spin_lock_irq(&file
->async_file
->lock
);
151 list_for_each_entry_safe(evt
, tmp
, &uobj
->async_list
, obj_list
) {
152 list_del(&evt
->list
);
155 spin_unlock_irq(&file
->async_file
->lock
);
158 void ib_uverbs_release_uevent(struct ib_uverbs_file
*file
,
159 struct ib_uevent_object
*uobj
)
161 struct ib_uverbs_event
*evt
, *tmp
;
163 spin_lock_irq(&file
->async_file
->lock
);
164 list_for_each_entry_safe(evt
, tmp
, &uobj
->event_list
, obj_list
) {
165 list_del(&evt
->list
);
168 spin_unlock_irq(&file
->async_file
->lock
);
171 static void ib_uverbs_detach_umcast(struct ib_qp
*qp
,
172 struct ib_uqp_object
*uobj
)
174 struct ib_uverbs_mcast_entry
*mcast
, *tmp
;
176 list_for_each_entry_safe(mcast
, tmp
, &uobj
->mcast_list
, list
) {
177 ib_detach_mcast(qp
, &mcast
->gid
, mcast
->lid
);
178 list_del(&mcast
->list
);
183 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file
*file
,
184 struct ib_ucontext
*context
)
186 struct ib_uobject
*uobj
, *tmp
;
191 context
->closing
= 1;
193 list_for_each_entry_safe(uobj
, tmp
, &context
->ah_list
, list
) {
194 struct ib_ah
*ah
= uobj
->object
;
196 idr_remove_uobj(&ib_uverbs_ah_idr
, uobj
);
201 list_for_each_entry_safe(uobj
, tmp
, &context
->qp_list
, list
) {
202 struct ib_qp
*qp
= uobj
->object
;
203 struct ib_uqp_object
*uqp
=
204 container_of(uobj
, struct ib_uqp_object
, uevent
.uobject
);
206 idr_remove_uobj(&ib_uverbs_qp_idr
, uobj
);
207 ib_uverbs_detach_umcast(qp
, uqp
);
209 ib_uverbs_release_uevent(file
, &uqp
->uevent
);
213 list_for_each_entry_safe(uobj
, tmp
, &context
->cq_list
, list
) {
214 struct ib_cq
*cq
= uobj
->object
;
215 struct ib_uverbs_event_file
*ev_file
= cq
->cq_context
;
216 struct ib_ucq_object
*ucq
=
217 container_of(uobj
, struct ib_ucq_object
, uobject
);
219 idr_remove_uobj(&ib_uverbs_cq_idr
, uobj
);
221 ib_uverbs_release_ucq(file
, ev_file
, ucq
);
225 list_for_each_entry_safe(uobj
, tmp
, &context
->srq_list
, list
) {
226 struct ib_srq
*srq
= uobj
->object
;
227 struct ib_uevent_object
*uevent
=
228 container_of(uobj
, struct ib_uevent_object
, uobject
);
230 idr_remove_uobj(&ib_uverbs_srq_idr
, uobj
);
232 ib_uverbs_release_uevent(file
, uevent
);
238 list_for_each_entry_safe(uobj
, tmp
, &context
->mr_list
, list
) {
239 struct ib_mr
*mr
= uobj
->object
;
241 idr_remove_uobj(&ib_uverbs_mr_idr
, uobj
);
246 list_for_each_entry_safe(uobj
, tmp
, &context
->pd_list
, list
) {
247 struct ib_pd
*pd
= uobj
->object
;
249 idr_remove_uobj(&ib_uverbs_pd_idr
, uobj
);
254 return context
->device
->dealloc_ucontext(context
);
257 static void ib_uverbs_release_file(struct kref
*ref
)
259 struct ib_uverbs_file
*file
=
260 container_of(ref
, struct ib_uverbs_file
, ref
);
262 module_put(file
->device
->ib_dev
->owner
);
263 kref_put(&file
->device
->ref
, ib_uverbs_release_dev
);
268 static ssize_t
ib_uverbs_event_read(struct file
*filp
, char __user
*buf
,
269 size_t count
, loff_t
*pos
)
271 struct ib_uverbs_event_file
*file
= filp
->private_data
;
272 struct ib_uverbs_event
*event
;
276 spin_lock_irq(&file
->lock
);
278 while (list_empty(&file
->event_list
)) {
279 spin_unlock_irq(&file
->lock
);
281 if (filp
->f_flags
& O_NONBLOCK
)
284 if (wait_event_interruptible(file
->poll_wait
,
285 !list_empty(&file
->event_list
)))
288 spin_lock_irq(&file
->lock
);
291 event
= list_entry(file
->event_list
.next
, struct ib_uverbs_event
, list
);
294 eventsz
= sizeof (struct ib_uverbs_async_event_desc
);
296 eventsz
= sizeof (struct ib_uverbs_comp_event_desc
);
298 if (eventsz
> count
) {
302 list_del(file
->event_list
.next
);
303 if (event
->counter
) {
305 list_del(&event
->obj_list
);
309 spin_unlock_irq(&file
->lock
);
312 if (copy_to_user(buf
, event
, eventsz
))
323 static unsigned int ib_uverbs_event_poll(struct file
*filp
,
324 struct poll_table_struct
*wait
)
326 unsigned int pollflags
= 0;
327 struct ib_uverbs_event_file
*file
= filp
->private_data
;
329 poll_wait(filp
, &file
->poll_wait
, wait
);
331 spin_lock_irq(&file
->lock
);
332 if (!list_empty(&file
->event_list
))
333 pollflags
= POLLIN
| POLLRDNORM
;
334 spin_unlock_irq(&file
->lock
);
339 static int ib_uverbs_event_fasync(int fd
, struct file
*filp
, int on
)
341 struct ib_uverbs_event_file
*file
= filp
->private_data
;
343 return fasync_helper(fd
, filp
, on
, &file
->async_queue
);
346 static int ib_uverbs_event_close(struct inode
*inode
, struct file
*filp
)
348 struct ib_uverbs_event_file
*file
= filp
->private_data
;
349 struct ib_uverbs_event
*entry
, *tmp
;
351 spin_lock_irq(&file
->lock
);
353 list_for_each_entry_safe(entry
, tmp
, &file
->event_list
, list
) {
355 list_del(&entry
->obj_list
);
358 spin_unlock_irq(&file
->lock
);
360 if (file
->is_async
) {
361 ib_unregister_event_handler(&file
->uverbs_file
->event_handler
);
362 kref_put(&file
->uverbs_file
->ref
, ib_uverbs_release_file
);
364 kref_put(&file
->ref
, ib_uverbs_release_event_file
);
369 static const struct file_operations uverbs_event_fops
= {
370 .owner
= THIS_MODULE
,
371 .read
= ib_uverbs_event_read
,
372 .poll
= ib_uverbs_event_poll
,
373 .release
= ib_uverbs_event_close
,
374 .fasync
= ib_uverbs_event_fasync
377 void ib_uverbs_comp_handler(struct ib_cq
*cq
, void *cq_context
)
379 struct ib_uverbs_event_file
*file
= cq_context
;
380 struct ib_ucq_object
*uobj
;
381 struct ib_uverbs_event
*entry
;
387 spin_lock_irqsave(&file
->lock
, flags
);
388 if (file
->is_closed
) {
389 spin_unlock_irqrestore(&file
->lock
, flags
);
393 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
395 spin_unlock_irqrestore(&file
->lock
, flags
);
399 uobj
= container_of(cq
->uobject
, struct ib_ucq_object
, uobject
);
401 entry
->desc
.comp
.cq_handle
= cq
->uobject
->user_handle
;
402 entry
->counter
= &uobj
->comp_events_reported
;
404 list_add_tail(&entry
->list
, &file
->event_list
);
405 list_add_tail(&entry
->obj_list
, &uobj
->comp_list
);
406 spin_unlock_irqrestore(&file
->lock
, flags
);
408 wake_up_interruptible(&file
->poll_wait
);
409 kill_fasync(&file
->async_queue
, SIGIO
, POLL_IN
);
412 static void ib_uverbs_async_handler(struct ib_uverbs_file
*file
,
413 __u64 element
, __u64 event
,
414 struct list_head
*obj_list
,
417 struct ib_uverbs_event
*entry
;
420 spin_lock_irqsave(&file
->async_file
->lock
, flags
);
421 if (file
->async_file
->is_closed
) {
422 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
426 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
428 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
432 entry
->desc
.async
.element
= element
;
433 entry
->desc
.async
.event_type
= event
;
434 entry
->counter
= counter
;
436 list_add_tail(&entry
->list
, &file
->async_file
->event_list
);
438 list_add_tail(&entry
->obj_list
, obj_list
);
439 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
441 wake_up_interruptible(&file
->async_file
->poll_wait
);
442 kill_fasync(&file
->async_file
->async_queue
, SIGIO
, POLL_IN
);
445 void ib_uverbs_cq_event_handler(struct ib_event
*event
, void *context_ptr
)
447 struct ib_ucq_object
*uobj
= container_of(event
->element
.cq
->uobject
,
448 struct ib_ucq_object
, uobject
);
450 ib_uverbs_async_handler(uobj
->uverbs_file
, uobj
->uobject
.user_handle
,
451 event
->event
, &uobj
->async_list
,
452 &uobj
->async_events_reported
);
455 void ib_uverbs_qp_event_handler(struct ib_event
*event
, void *context_ptr
)
457 struct ib_uevent_object
*uobj
;
459 uobj
= container_of(event
->element
.qp
->uobject
,
460 struct ib_uevent_object
, uobject
);
462 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
463 event
->event
, &uobj
->event_list
,
464 &uobj
->events_reported
);
467 void ib_uverbs_srq_event_handler(struct ib_event
*event
, void *context_ptr
)
469 struct ib_uevent_object
*uobj
;
471 uobj
= container_of(event
->element
.srq
->uobject
,
472 struct ib_uevent_object
, uobject
);
474 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
475 event
->event
, &uobj
->event_list
,
476 &uobj
->events_reported
);
479 void ib_uverbs_event_handler(struct ib_event_handler
*handler
,
480 struct ib_event
*event
)
482 struct ib_uverbs_file
*file
=
483 container_of(handler
, struct ib_uverbs_file
, event_handler
);
485 ib_uverbs_async_handler(file
, event
->element
.port_num
, event
->event
,
489 struct file
*ib_uverbs_alloc_event_file(struct ib_uverbs_file
*uverbs_file
,
490 int is_async
, int *fd
)
492 struct ib_uverbs_event_file
*ev_file
;
497 ev_file
= kmalloc(sizeof *ev_file
, GFP_KERNEL
);
499 return ERR_PTR(-ENOMEM
);
501 kref_init(&ev_file
->ref
);
502 spin_lock_init(&ev_file
->lock
);
503 INIT_LIST_HEAD(&ev_file
->event_list
);
504 init_waitqueue_head(&ev_file
->poll_wait
);
505 ev_file
->uverbs_file
= uverbs_file
;
506 ev_file
->async_queue
= NULL
;
507 ev_file
->is_async
= is_async
;
508 ev_file
->is_closed
= 0;
510 *fd
= get_unused_fd();
517 * fops_get() can't fail here, because we're coming from a
518 * system call on a uverbs file, which will already have a
521 path
.mnt
= uverbs_event_mnt
;
522 path
.dentry
= uverbs_event_mnt
->mnt_root
;
524 filp
= alloc_file(&path
, FMODE_READ
, fops_get(&uverbs_event_fops
));
530 filp
->private_data
= ev_file
;
535 fops_put(&uverbs_event_fops
);
545 * Look up a completion event file by FD. If lookup is successful,
546 * takes a ref to the event file struct that it returns; if
547 * unsuccessful, returns NULL.
549 struct ib_uverbs_event_file
*ib_uverbs_lookup_comp_file(int fd
)
551 struct ib_uverbs_event_file
*ev_file
= NULL
;
558 if (filp
->f_op
!= &uverbs_event_fops
)
561 ev_file
= filp
->private_data
;
562 if (ev_file
->is_async
) {
567 kref_get(&ev_file
->ref
);
574 static ssize_t
ib_uverbs_write(struct file
*filp
, const char __user
*buf
,
575 size_t count
, loff_t
*pos
)
577 struct ib_uverbs_file
*file
= filp
->private_data
;
578 struct ib_uverbs_cmd_hdr hdr
;
580 if (count
< sizeof hdr
)
583 if (copy_from_user(&hdr
, buf
, sizeof hdr
))
586 if (hdr
.in_words
* 4 != count
)
589 if (hdr
.command
< 0 ||
590 hdr
.command
>= ARRAY_SIZE(uverbs_cmd_table
) ||
591 !uverbs_cmd_table
[hdr
.command
])
594 if (!file
->ucontext
&&
595 hdr
.command
!= IB_USER_VERBS_CMD_GET_CONTEXT
)
598 if (!(file
->device
->ib_dev
->uverbs_cmd_mask
& (1ull << hdr
.command
)))
601 return uverbs_cmd_table
[hdr
.command
](file
, buf
+ sizeof hdr
,
602 hdr
.in_words
* 4, hdr
.out_words
* 4);
605 static int ib_uverbs_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
607 struct ib_uverbs_file
*file
= filp
->private_data
;
612 return file
->device
->ib_dev
->mmap(file
->ucontext
, vma
);
616 * ib_uverbs_open() does not need the BKL:
618 * - the ib_uverbs_device structures are properly reference counted and
619 * everything else is purely local to the file being created, so
620 * races against other open calls are not a problem;
621 * - there is no ioctl method to race against;
622 * - the open method will either immediately run -ENXIO, or all
623 * required initialization will be done.
625 static int ib_uverbs_open(struct inode
*inode
, struct file
*filp
)
627 struct ib_uverbs_device
*dev
;
628 struct ib_uverbs_file
*file
;
631 dev
= container_of(inode
->i_cdev
, struct ib_uverbs_device
, cdev
);
637 if (!try_module_get(dev
->ib_dev
->owner
)) {
642 file
= kmalloc(sizeof *file
, GFP_KERNEL
);
649 file
->ucontext
= NULL
;
650 file
->async_file
= NULL
;
651 kref_init(&file
->ref
);
652 mutex_init(&file
->mutex
);
654 filp
->private_data
= file
;
659 module_put(dev
->ib_dev
->owner
);
662 kref_put(&dev
->ref
, ib_uverbs_release_dev
);
666 static int ib_uverbs_close(struct inode
*inode
, struct file
*filp
)
668 struct ib_uverbs_file
*file
= filp
->private_data
;
670 ib_uverbs_cleanup_ucontext(file
, file
->ucontext
);
672 if (file
->async_file
)
673 kref_put(&file
->async_file
->ref
, ib_uverbs_release_event_file
);
675 kref_put(&file
->ref
, ib_uverbs_release_file
);
680 static const struct file_operations uverbs_fops
= {
681 .owner
= THIS_MODULE
,
682 .write
= ib_uverbs_write
,
683 .open
= ib_uverbs_open
,
684 .release
= ib_uverbs_close
687 static const struct file_operations uverbs_mmap_fops
= {
688 .owner
= THIS_MODULE
,
689 .write
= ib_uverbs_write
,
690 .mmap
= ib_uverbs_mmap
,
691 .open
= ib_uverbs_open
,
692 .release
= ib_uverbs_close
695 static struct ib_client uverbs_client
= {
697 .add
= ib_uverbs_add_one
,
698 .remove
= ib_uverbs_remove_one
701 static ssize_t
show_ibdev(struct device
*device
, struct device_attribute
*attr
,
704 struct ib_uverbs_device
*dev
= dev_get_drvdata(device
);
709 return sprintf(buf
, "%s\n", dev
->ib_dev
->name
);
711 static DEVICE_ATTR(ibdev
, S_IRUGO
, show_ibdev
, NULL
);
713 static ssize_t
show_dev_abi_version(struct device
*device
,
714 struct device_attribute
*attr
, char *buf
)
716 struct ib_uverbs_device
*dev
= dev_get_drvdata(device
);
721 return sprintf(buf
, "%d\n", dev
->ib_dev
->uverbs_abi_ver
);
723 static DEVICE_ATTR(abi_version
, S_IRUGO
, show_dev_abi_version
, NULL
);
725 static ssize_t
show_abi_version(struct class *class, char *buf
)
727 return sprintf(buf
, "%d\n", IB_USER_VERBS_ABI_VERSION
);
729 static CLASS_ATTR(abi_version
, S_IRUGO
, show_abi_version
, NULL
);
731 static void ib_uverbs_add_one(struct ib_device
*device
)
735 struct ib_uverbs_device
*uverbs_dev
;
737 if (!device
->alloc_ucontext
)
740 uverbs_dev
= kzalloc(sizeof *uverbs_dev
, GFP_KERNEL
);
744 kref_init(&uverbs_dev
->ref
);
745 init_completion(&uverbs_dev
->comp
);
747 spin_lock(&map_lock
);
748 devnum
= find_first_zero_bit(dev_map
, IB_UVERBS_MAX_DEVICES
);
749 if (devnum
>= IB_UVERBS_MAX_DEVICES
) {
750 spin_unlock(&map_lock
);
753 uverbs_dev
->devnum
= devnum
;
754 base
= devnum
+ IB_UVERBS_BASE_DEV
;
755 set_bit(devnum
, dev_map
);
756 spin_unlock(&map_lock
);
758 uverbs_dev
->ib_dev
= device
;
759 uverbs_dev
->num_comp_vectors
= device
->num_comp_vectors
;
761 cdev_init(&uverbs_dev
->cdev
, NULL
);
762 uverbs_dev
->cdev
.owner
= THIS_MODULE
;
763 uverbs_dev
->cdev
.ops
= device
->mmap
? &uverbs_mmap_fops
: &uverbs_fops
;
764 kobject_set_name(&uverbs_dev
->cdev
.kobj
, "uverbs%d", uverbs_dev
->devnum
);
765 if (cdev_add(&uverbs_dev
->cdev
, base
, 1))
768 uverbs_dev
->dev
= device_create(uverbs_class
, device
->dma_device
,
769 uverbs_dev
->cdev
.dev
, uverbs_dev
,
770 "uverbs%d", uverbs_dev
->devnum
);
771 if (IS_ERR(uverbs_dev
->dev
))
774 if (device_create_file(uverbs_dev
->dev
, &dev_attr_ibdev
))
776 if (device_create_file(uverbs_dev
->dev
, &dev_attr_abi_version
))
779 ib_set_client_data(device
, &uverbs_client
, uverbs_dev
);
784 device_destroy(uverbs_class
, uverbs_dev
->cdev
.dev
);
787 cdev_del(&uverbs_dev
->cdev
);
788 clear_bit(devnum
, dev_map
);
791 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
792 wait_for_completion(&uverbs_dev
->comp
);
797 static void ib_uverbs_remove_one(struct ib_device
*device
)
799 struct ib_uverbs_device
*uverbs_dev
= ib_get_client_data(device
, &uverbs_client
);
804 dev_set_drvdata(uverbs_dev
->dev
, NULL
);
805 device_destroy(uverbs_class
, uverbs_dev
->cdev
.dev
);
806 cdev_del(&uverbs_dev
->cdev
);
808 clear_bit(uverbs_dev
->devnum
, dev_map
);
810 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
811 wait_for_completion(&uverbs_dev
->comp
);
815 static int uverbs_event_get_sb(struct file_system_type
*fs_type
, int flags
,
816 const char *dev_name
, void *data
,
817 struct vfsmount
*mnt
)
819 return get_sb_pseudo(fs_type
, "infinibandevent:", NULL
,
820 INFINIBANDEVENTFS_MAGIC
, mnt
);
823 static struct file_system_type uverbs_event_fs
= {
824 /* No owner field so module can be unloaded */
825 .name
= "infinibandeventfs",
826 .get_sb
= uverbs_event_get_sb
,
827 .kill_sb
= kill_litter_super
830 static int __init
ib_uverbs_init(void)
834 ret
= register_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
,
837 printk(KERN_ERR
"user_verbs: couldn't register device number\n");
841 uverbs_class
= class_create(THIS_MODULE
, "infiniband_verbs");
842 if (IS_ERR(uverbs_class
)) {
843 ret
= PTR_ERR(uverbs_class
);
844 printk(KERN_ERR
"user_verbs: couldn't create class infiniband_verbs\n");
848 ret
= class_create_file(uverbs_class
, &class_attr_abi_version
);
850 printk(KERN_ERR
"user_verbs: couldn't create abi_version attribute\n");
854 ret
= register_filesystem(&uverbs_event_fs
);
856 printk(KERN_ERR
"user_verbs: couldn't register infinibandeventfs\n");
860 uverbs_event_mnt
= kern_mount(&uverbs_event_fs
);
861 if (IS_ERR(uverbs_event_mnt
)) {
862 ret
= PTR_ERR(uverbs_event_mnt
);
863 printk(KERN_ERR
"user_verbs: couldn't mount infinibandeventfs\n");
867 ret
= ib_register_client(&uverbs_client
);
869 printk(KERN_ERR
"user_verbs: couldn't register client\n");
876 mntput(uverbs_event_mnt
);
879 unregister_filesystem(&uverbs_event_fs
);
882 class_destroy(uverbs_class
);
885 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
891 static void __exit
ib_uverbs_cleanup(void)
893 ib_unregister_client(&uverbs_client
);
894 mntput(uverbs_event_mnt
);
895 unregister_filesystem(&uverbs_event_fs
);
896 class_destroy(uverbs_class
);
897 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
898 idr_destroy(&ib_uverbs_pd_idr
);
899 idr_destroy(&ib_uverbs_mr_idr
);
900 idr_destroy(&ib_uverbs_mw_idr
);
901 idr_destroy(&ib_uverbs_ah_idr
);
902 idr_destroy(&ib_uverbs_cq_idr
);
903 idr_destroy(&ib_uverbs_qp_idr
);
904 idr_destroy(&ib_uverbs_srq_idr
);
907 module_init(ib_uverbs_init
);
908 module_exit(ib_uverbs_cleanup
);