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/cdev.h>
46 #include <linux/anon_inodes.h>
47 #include <linux/slab.h>
49 #include <asm/uaccess.h>
53 MODULE_AUTHOR("Roland Dreier");
54 MODULE_DESCRIPTION("InfiniBand userspace verbs access");
55 MODULE_LICENSE("Dual BSD/GPL");
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 void ib_uverbs_add_one(struct ib_device
*device
);
113 static void ib_uverbs_remove_one(struct ib_device
*device
);
115 static void ib_uverbs_release_dev(struct kref
*ref
)
117 struct ib_uverbs_device
*dev
=
118 container_of(ref
, struct ib_uverbs_device
, ref
);
120 complete(&dev
->comp
);
123 static void ib_uverbs_release_event_file(struct kref
*ref
)
125 struct ib_uverbs_event_file
*file
=
126 container_of(ref
, struct ib_uverbs_event_file
, ref
);
131 void ib_uverbs_release_ucq(struct ib_uverbs_file
*file
,
132 struct ib_uverbs_event_file
*ev_file
,
133 struct ib_ucq_object
*uobj
)
135 struct ib_uverbs_event
*evt
, *tmp
;
138 spin_lock_irq(&ev_file
->lock
);
139 list_for_each_entry_safe(evt
, tmp
, &uobj
->comp_list
, obj_list
) {
140 list_del(&evt
->list
);
143 spin_unlock_irq(&ev_file
->lock
);
145 kref_put(&ev_file
->ref
, ib_uverbs_release_event_file
);
148 spin_lock_irq(&file
->async_file
->lock
);
149 list_for_each_entry_safe(evt
, tmp
, &uobj
->async_list
, obj_list
) {
150 list_del(&evt
->list
);
153 spin_unlock_irq(&file
->async_file
->lock
);
156 void ib_uverbs_release_uevent(struct ib_uverbs_file
*file
,
157 struct ib_uevent_object
*uobj
)
159 struct ib_uverbs_event
*evt
, *tmp
;
161 spin_lock_irq(&file
->async_file
->lock
);
162 list_for_each_entry_safe(evt
, tmp
, &uobj
->event_list
, obj_list
) {
163 list_del(&evt
->list
);
166 spin_unlock_irq(&file
->async_file
->lock
);
169 static void ib_uverbs_detach_umcast(struct ib_qp
*qp
,
170 struct ib_uqp_object
*uobj
)
172 struct ib_uverbs_mcast_entry
*mcast
, *tmp
;
174 list_for_each_entry_safe(mcast
, tmp
, &uobj
->mcast_list
, list
) {
175 ib_detach_mcast(qp
, &mcast
->gid
, mcast
->lid
);
176 list_del(&mcast
->list
);
181 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file
*file
,
182 struct ib_ucontext
*context
)
184 struct ib_uobject
*uobj
, *tmp
;
189 context
->closing
= 1;
191 list_for_each_entry_safe(uobj
, tmp
, &context
->ah_list
, list
) {
192 struct ib_ah
*ah
= uobj
->object
;
194 idr_remove_uobj(&ib_uverbs_ah_idr
, uobj
);
199 list_for_each_entry_safe(uobj
, tmp
, &context
->qp_list
, list
) {
200 struct ib_qp
*qp
= uobj
->object
;
201 struct ib_uqp_object
*uqp
=
202 container_of(uobj
, struct ib_uqp_object
, uevent
.uobject
);
204 idr_remove_uobj(&ib_uverbs_qp_idr
, uobj
);
205 ib_uverbs_detach_umcast(qp
, uqp
);
207 ib_uverbs_release_uevent(file
, &uqp
->uevent
);
211 list_for_each_entry_safe(uobj
, tmp
, &context
->cq_list
, list
) {
212 struct ib_cq
*cq
= uobj
->object
;
213 struct ib_uverbs_event_file
*ev_file
= cq
->cq_context
;
214 struct ib_ucq_object
*ucq
=
215 container_of(uobj
, struct ib_ucq_object
, uobject
);
217 idr_remove_uobj(&ib_uverbs_cq_idr
, uobj
);
219 ib_uverbs_release_ucq(file
, ev_file
, ucq
);
223 list_for_each_entry_safe(uobj
, tmp
, &context
->srq_list
, list
) {
224 struct ib_srq
*srq
= uobj
->object
;
225 struct ib_uevent_object
*uevent
=
226 container_of(uobj
, struct ib_uevent_object
, uobject
);
228 idr_remove_uobj(&ib_uverbs_srq_idr
, uobj
);
230 ib_uverbs_release_uevent(file
, uevent
);
236 list_for_each_entry_safe(uobj
, tmp
, &context
->mr_list
, list
) {
237 struct ib_mr
*mr
= uobj
->object
;
239 idr_remove_uobj(&ib_uverbs_mr_idr
, uobj
);
244 list_for_each_entry_safe(uobj
, tmp
, &context
->pd_list
, list
) {
245 struct ib_pd
*pd
= uobj
->object
;
247 idr_remove_uobj(&ib_uverbs_pd_idr
, uobj
);
252 return context
->device
->dealloc_ucontext(context
);
255 static void ib_uverbs_release_file(struct kref
*ref
)
257 struct ib_uverbs_file
*file
=
258 container_of(ref
, struct ib_uverbs_file
, ref
);
260 module_put(file
->device
->ib_dev
->owner
);
261 kref_put(&file
->device
->ref
, ib_uverbs_release_dev
);
266 static ssize_t
ib_uverbs_event_read(struct file
*filp
, char __user
*buf
,
267 size_t count
, loff_t
*pos
)
269 struct ib_uverbs_event_file
*file
= filp
->private_data
;
270 struct ib_uverbs_event
*event
;
274 spin_lock_irq(&file
->lock
);
276 while (list_empty(&file
->event_list
)) {
277 spin_unlock_irq(&file
->lock
);
279 if (filp
->f_flags
& O_NONBLOCK
)
282 if (wait_event_interruptible(file
->poll_wait
,
283 !list_empty(&file
->event_list
)))
286 spin_lock_irq(&file
->lock
);
289 event
= list_entry(file
->event_list
.next
, struct ib_uverbs_event
, list
);
292 eventsz
= sizeof (struct ib_uverbs_async_event_desc
);
294 eventsz
= sizeof (struct ib_uverbs_comp_event_desc
);
296 if (eventsz
> count
) {
300 list_del(file
->event_list
.next
);
301 if (event
->counter
) {
303 list_del(&event
->obj_list
);
307 spin_unlock_irq(&file
->lock
);
310 if (copy_to_user(buf
, event
, eventsz
))
321 static unsigned int ib_uverbs_event_poll(struct file
*filp
,
322 struct poll_table_struct
*wait
)
324 unsigned int pollflags
= 0;
325 struct ib_uverbs_event_file
*file
= filp
->private_data
;
327 poll_wait(filp
, &file
->poll_wait
, wait
);
329 spin_lock_irq(&file
->lock
);
330 if (!list_empty(&file
->event_list
))
331 pollflags
= POLLIN
| POLLRDNORM
;
332 spin_unlock_irq(&file
->lock
);
337 static int ib_uverbs_event_fasync(int fd
, struct file
*filp
, int on
)
339 struct ib_uverbs_event_file
*file
= filp
->private_data
;
341 return fasync_helper(fd
, filp
, on
, &file
->async_queue
);
344 static int ib_uverbs_event_close(struct inode
*inode
, struct file
*filp
)
346 struct ib_uverbs_event_file
*file
= filp
->private_data
;
347 struct ib_uverbs_event
*entry
, *tmp
;
349 spin_lock_irq(&file
->lock
);
351 list_for_each_entry_safe(entry
, tmp
, &file
->event_list
, list
) {
353 list_del(&entry
->obj_list
);
356 spin_unlock_irq(&file
->lock
);
358 if (file
->is_async
) {
359 ib_unregister_event_handler(&file
->uverbs_file
->event_handler
);
360 kref_put(&file
->uverbs_file
->ref
, ib_uverbs_release_file
);
362 kref_put(&file
->ref
, ib_uverbs_release_event_file
);
367 static const struct file_operations uverbs_event_fops
= {
368 .owner
= THIS_MODULE
,
369 .read
= ib_uverbs_event_read
,
370 .poll
= ib_uverbs_event_poll
,
371 .release
= ib_uverbs_event_close
,
372 .fasync
= ib_uverbs_event_fasync
375 void ib_uverbs_comp_handler(struct ib_cq
*cq
, void *cq_context
)
377 struct ib_uverbs_event_file
*file
= cq_context
;
378 struct ib_ucq_object
*uobj
;
379 struct ib_uverbs_event
*entry
;
385 spin_lock_irqsave(&file
->lock
, flags
);
386 if (file
->is_closed
) {
387 spin_unlock_irqrestore(&file
->lock
, flags
);
391 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
393 spin_unlock_irqrestore(&file
->lock
, flags
);
397 uobj
= container_of(cq
->uobject
, struct ib_ucq_object
, uobject
);
399 entry
->desc
.comp
.cq_handle
= cq
->uobject
->user_handle
;
400 entry
->counter
= &uobj
->comp_events_reported
;
402 list_add_tail(&entry
->list
, &file
->event_list
);
403 list_add_tail(&entry
->obj_list
, &uobj
->comp_list
);
404 spin_unlock_irqrestore(&file
->lock
, flags
);
406 wake_up_interruptible(&file
->poll_wait
);
407 kill_fasync(&file
->async_queue
, SIGIO
, POLL_IN
);
410 static void ib_uverbs_async_handler(struct ib_uverbs_file
*file
,
411 __u64 element
, __u64 event
,
412 struct list_head
*obj_list
,
415 struct ib_uverbs_event
*entry
;
418 spin_lock_irqsave(&file
->async_file
->lock
, flags
);
419 if (file
->async_file
->is_closed
) {
420 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
424 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
426 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
430 entry
->desc
.async
.element
= element
;
431 entry
->desc
.async
.event_type
= event
;
432 entry
->counter
= counter
;
434 list_add_tail(&entry
->list
, &file
->async_file
->event_list
);
436 list_add_tail(&entry
->obj_list
, obj_list
);
437 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
439 wake_up_interruptible(&file
->async_file
->poll_wait
);
440 kill_fasync(&file
->async_file
->async_queue
, SIGIO
, POLL_IN
);
443 void ib_uverbs_cq_event_handler(struct ib_event
*event
, void *context_ptr
)
445 struct ib_ucq_object
*uobj
= container_of(event
->element
.cq
->uobject
,
446 struct ib_ucq_object
, uobject
);
448 ib_uverbs_async_handler(uobj
->uverbs_file
, uobj
->uobject
.user_handle
,
449 event
->event
, &uobj
->async_list
,
450 &uobj
->async_events_reported
);
453 void ib_uverbs_qp_event_handler(struct ib_event
*event
, void *context_ptr
)
455 struct ib_uevent_object
*uobj
;
457 uobj
= container_of(event
->element
.qp
->uobject
,
458 struct ib_uevent_object
, uobject
);
460 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
461 event
->event
, &uobj
->event_list
,
462 &uobj
->events_reported
);
465 void ib_uverbs_srq_event_handler(struct ib_event
*event
, void *context_ptr
)
467 struct ib_uevent_object
*uobj
;
469 uobj
= container_of(event
->element
.srq
->uobject
,
470 struct ib_uevent_object
, uobject
);
472 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
473 event
->event
, &uobj
->event_list
,
474 &uobj
->events_reported
);
477 void ib_uverbs_event_handler(struct ib_event_handler
*handler
,
478 struct ib_event
*event
)
480 struct ib_uverbs_file
*file
=
481 container_of(handler
, struct ib_uverbs_file
, event_handler
);
483 ib_uverbs_async_handler(file
, event
->element
.port_num
, event
->event
,
487 struct file
*ib_uverbs_alloc_event_file(struct ib_uverbs_file
*uverbs_file
,
490 struct ib_uverbs_event_file
*ev_file
;
493 ev_file
= kmalloc(sizeof *ev_file
, GFP_KERNEL
);
495 return ERR_PTR(-ENOMEM
);
497 kref_init(&ev_file
->ref
);
498 spin_lock_init(&ev_file
->lock
);
499 INIT_LIST_HEAD(&ev_file
->event_list
);
500 init_waitqueue_head(&ev_file
->poll_wait
);
501 ev_file
->uverbs_file
= uverbs_file
;
502 ev_file
->async_queue
= NULL
;
503 ev_file
->is_async
= is_async
;
504 ev_file
->is_closed
= 0;
506 filp
= anon_inode_getfile("[infinibandevent]", &uverbs_event_fops
,
515 * Look up a completion event file by FD. If lookup is successful,
516 * takes a ref to the event file struct that it returns; if
517 * unsuccessful, returns NULL.
519 struct ib_uverbs_event_file
*ib_uverbs_lookup_comp_file(int fd
)
521 struct ib_uverbs_event_file
*ev_file
= NULL
;
528 if (filp
->f_op
!= &uverbs_event_fops
)
531 ev_file
= filp
->private_data
;
532 if (ev_file
->is_async
) {
537 kref_get(&ev_file
->ref
);
544 static ssize_t
ib_uverbs_write(struct file
*filp
, const char __user
*buf
,
545 size_t count
, loff_t
*pos
)
547 struct ib_uverbs_file
*file
= filp
->private_data
;
548 struct ib_uverbs_cmd_hdr hdr
;
550 if (count
< sizeof hdr
)
553 if (copy_from_user(&hdr
, buf
, sizeof hdr
))
556 if (hdr
.in_words
* 4 != count
)
559 if (hdr
.command
< 0 ||
560 hdr
.command
>= ARRAY_SIZE(uverbs_cmd_table
) ||
561 !uverbs_cmd_table
[hdr
.command
])
564 if (!file
->ucontext
&&
565 hdr
.command
!= IB_USER_VERBS_CMD_GET_CONTEXT
)
568 if (!(file
->device
->ib_dev
->uverbs_cmd_mask
& (1ull << hdr
.command
)))
571 return uverbs_cmd_table
[hdr
.command
](file
, buf
+ sizeof hdr
,
572 hdr
.in_words
* 4, hdr
.out_words
* 4);
575 static int ib_uverbs_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
577 struct ib_uverbs_file
*file
= filp
->private_data
;
582 return file
->device
->ib_dev
->mmap(file
->ucontext
, vma
);
586 * ib_uverbs_open() does not need the BKL:
588 * - the ib_uverbs_device structures are properly reference counted and
589 * everything else is purely local to the file being created, so
590 * races against other open calls are not a problem;
591 * - there is no ioctl method to race against;
592 * - the open method will either immediately run -ENXIO, or all
593 * required initialization will be done.
595 static int ib_uverbs_open(struct inode
*inode
, struct file
*filp
)
597 struct ib_uverbs_device
*dev
;
598 struct ib_uverbs_file
*file
;
601 dev
= container_of(inode
->i_cdev
, struct ib_uverbs_device
, cdev
);
607 if (!try_module_get(dev
->ib_dev
->owner
)) {
612 file
= kmalloc(sizeof *file
, GFP_KERNEL
);
619 file
->ucontext
= NULL
;
620 file
->async_file
= NULL
;
621 kref_init(&file
->ref
);
622 mutex_init(&file
->mutex
);
624 filp
->private_data
= file
;
629 module_put(dev
->ib_dev
->owner
);
632 kref_put(&dev
->ref
, ib_uverbs_release_dev
);
636 static int ib_uverbs_close(struct inode
*inode
, struct file
*filp
)
638 struct ib_uverbs_file
*file
= filp
->private_data
;
640 ib_uverbs_cleanup_ucontext(file
, file
->ucontext
);
642 if (file
->async_file
)
643 kref_put(&file
->async_file
->ref
, ib_uverbs_release_event_file
);
645 kref_put(&file
->ref
, ib_uverbs_release_file
);
650 static const struct file_operations uverbs_fops
= {
651 .owner
= THIS_MODULE
,
652 .write
= ib_uverbs_write
,
653 .open
= ib_uverbs_open
,
654 .release
= ib_uverbs_close
657 static const struct file_operations uverbs_mmap_fops
= {
658 .owner
= THIS_MODULE
,
659 .write
= ib_uverbs_write
,
660 .mmap
= ib_uverbs_mmap
,
661 .open
= ib_uverbs_open
,
662 .release
= ib_uverbs_close
665 static struct ib_client uverbs_client
= {
667 .add
= ib_uverbs_add_one
,
668 .remove
= ib_uverbs_remove_one
671 static ssize_t
show_ibdev(struct device
*device
, struct device_attribute
*attr
,
674 struct ib_uverbs_device
*dev
= dev_get_drvdata(device
);
679 return sprintf(buf
, "%s\n", dev
->ib_dev
->name
);
681 static DEVICE_ATTR(ibdev
, S_IRUGO
, show_ibdev
, NULL
);
683 static ssize_t
show_dev_abi_version(struct device
*device
,
684 struct device_attribute
*attr
, char *buf
)
686 struct ib_uverbs_device
*dev
= dev_get_drvdata(device
);
691 return sprintf(buf
, "%d\n", dev
->ib_dev
->uverbs_abi_ver
);
693 static DEVICE_ATTR(abi_version
, S_IRUGO
, show_dev_abi_version
, NULL
);
695 static CLASS_ATTR_STRING(abi_version
, S_IRUGO
,
696 __stringify(IB_USER_VERBS_ABI_VERSION
));
698 static dev_t overflow_maj
;
699 static DECLARE_BITMAP(overflow_map
, IB_UVERBS_MAX_DEVICES
);
702 * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by
703 * requesting a new major number and doubling the number of max devices we
704 * support. It's stupid, but simple.
706 static int find_overflow_devnum(void)
711 ret
= alloc_chrdev_region(&overflow_maj
, 0, IB_UVERBS_MAX_DEVICES
,
714 printk(KERN_ERR
"user_verbs: couldn't register dynamic device number\n");
719 ret
= find_first_zero_bit(overflow_map
, IB_UVERBS_MAX_DEVICES
);
720 if (ret
>= IB_UVERBS_MAX_DEVICES
)
726 static void ib_uverbs_add_one(struct ib_device
*device
)
730 struct ib_uverbs_device
*uverbs_dev
;
732 if (!device
->alloc_ucontext
)
735 uverbs_dev
= kzalloc(sizeof *uverbs_dev
, GFP_KERNEL
);
739 kref_init(&uverbs_dev
->ref
);
740 init_completion(&uverbs_dev
->comp
);
742 spin_lock(&map_lock
);
743 devnum
= find_first_zero_bit(dev_map
, IB_UVERBS_MAX_DEVICES
);
744 if (devnum
>= IB_UVERBS_MAX_DEVICES
) {
745 spin_unlock(&map_lock
);
746 devnum
= find_overflow_devnum();
750 spin_lock(&map_lock
);
751 uverbs_dev
->devnum
= devnum
+ IB_UVERBS_MAX_DEVICES
;
752 base
= devnum
+ overflow_maj
;
753 set_bit(devnum
, overflow_map
);
755 uverbs_dev
->devnum
= devnum
;
756 base
= devnum
+ IB_UVERBS_BASE_DEV
;
757 set_bit(devnum
, dev_map
);
759 spin_unlock(&map_lock
);
761 uverbs_dev
->ib_dev
= device
;
762 uverbs_dev
->num_comp_vectors
= device
->num_comp_vectors
;
764 cdev_init(&uverbs_dev
->cdev
, NULL
);
765 uverbs_dev
->cdev
.owner
= THIS_MODULE
;
766 uverbs_dev
->cdev
.ops
= device
->mmap
? &uverbs_mmap_fops
: &uverbs_fops
;
767 kobject_set_name(&uverbs_dev
->cdev
.kobj
, "uverbs%d", uverbs_dev
->devnum
);
768 if (cdev_add(&uverbs_dev
->cdev
, base
, 1))
771 uverbs_dev
->dev
= device_create(uverbs_class
, device
->dma_device
,
772 uverbs_dev
->cdev
.dev
, uverbs_dev
,
773 "uverbs%d", uverbs_dev
->devnum
);
774 if (IS_ERR(uverbs_dev
->dev
))
777 if (device_create_file(uverbs_dev
->dev
, &dev_attr_ibdev
))
779 if (device_create_file(uverbs_dev
->dev
, &dev_attr_abi_version
))
782 ib_set_client_data(device
, &uverbs_client
, uverbs_dev
);
787 device_destroy(uverbs_class
, uverbs_dev
->cdev
.dev
);
790 cdev_del(&uverbs_dev
->cdev
);
791 if (uverbs_dev
->devnum
< IB_UVERBS_MAX_DEVICES
)
792 clear_bit(devnum
, dev_map
);
794 clear_bit(devnum
, overflow_map
);
797 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
798 wait_for_completion(&uverbs_dev
->comp
);
803 static void ib_uverbs_remove_one(struct ib_device
*device
)
805 struct ib_uverbs_device
*uverbs_dev
= ib_get_client_data(device
, &uverbs_client
);
810 dev_set_drvdata(uverbs_dev
->dev
, NULL
);
811 device_destroy(uverbs_class
, uverbs_dev
->cdev
.dev
);
812 cdev_del(&uverbs_dev
->cdev
);
814 if (uverbs_dev
->devnum
< IB_UVERBS_MAX_DEVICES
)
815 clear_bit(uverbs_dev
->devnum
, dev_map
);
817 clear_bit(uverbs_dev
->devnum
- IB_UVERBS_MAX_DEVICES
, overflow_map
);
819 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
820 wait_for_completion(&uverbs_dev
->comp
);
824 static int __init
ib_uverbs_init(void)
828 ret
= register_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
,
831 printk(KERN_ERR
"user_verbs: couldn't register device number\n");
835 uverbs_class
= class_create(THIS_MODULE
, "infiniband_verbs");
836 if (IS_ERR(uverbs_class
)) {
837 ret
= PTR_ERR(uverbs_class
);
838 printk(KERN_ERR
"user_verbs: couldn't create class infiniband_verbs\n");
842 ret
= class_create_file(uverbs_class
, &class_attr_abi_version
.attr
);
844 printk(KERN_ERR
"user_verbs: couldn't create abi_version attribute\n");
848 ret
= ib_register_client(&uverbs_client
);
850 printk(KERN_ERR
"user_verbs: couldn't register client\n");
857 class_destroy(uverbs_class
);
860 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
866 static void __exit
ib_uverbs_cleanup(void)
868 ib_unregister_client(&uverbs_client
);
869 class_destroy(uverbs_class
);
870 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
872 unregister_chrdev_region(overflow_maj
, IB_UVERBS_MAX_DEVICES
);
873 idr_destroy(&ib_uverbs_pd_idr
);
874 idr_destroy(&ib_uverbs_mr_idr
);
875 idr_destroy(&ib_uverbs_mw_idr
);
876 idr_destroy(&ib_uverbs_ah_idr
);
877 idr_destroy(&ib_uverbs_cq_idr
);
878 idr_destroy(&ib_uverbs_qp_idr
);
879 idr_destroy(&ib_uverbs_srq_idr
);
882 module_init(ib_uverbs_init
);
883 module_exit(ib_uverbs_cleanup
);