2 * Copyright (c) 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 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
36 * $Id: uverbs_main.c 2733 2005-06-28 19:14:34Z roland $
39 #include <linux/module.h>
40 #include <linux/init.h>
41 #include <linux/device.h>
42 #include <linux/err.h>
44 #include <linux/poll.h>
45 #include <linux/file.h>
46 #include <linux/mount.h>
47 #include <linux/cdev.h>
49 #include <asm/uaccess.h>
53 MODULE_AUTHOR("Roland Dreier");
54 MODULE_DESCRIPTION("InfiniBand userspace verbs access");
55 MODULE_LICENSE("Dual BSD/GPL");
57 #define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */
60 IB_UVERBS_MAJOR
= 231,
61 IB_UVERBS_BASE_MINOR
= 192,
62 IB_UVERBS_MAX_DEVICES
= 32
65 #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
67 static struct class *uverbs_class
;
69 DECLARE_MUTEX(ib_uverbs_idr_mutex
);
70 DEFINE_IDR(ib_uverbs_pd_idr
);
71 DEFINE_IDR(ib_uverbs_mr_idr
);
72 DEFINE_IDR(ib_uverbs_mw_idr
);
73 DEFINE_IDR(ib_uverbs_ah_idr
);
74 DEFINE_IDR(ib_uverbs_cq_idr
);
75 DEFINE_IDR(ib_uverbs_qp_idr
);
76 DEFINE_IDR(ib_uverbs_srq_idr
);
78 static spinlock_t map_lock
;
79 static struct ib_uverbs_device
*dev_table
[IB_UVERBS_MAX_DEVICES
];
80 static DECLARE_BITMAP(dev_map
, IB_UVERBS_MAX_DEVICES
);
82 static ssize_t (*uverbs_cmd_table
[])(struct ib_uverbs_file
*file
,
83 const char __user
*buf
, int in_len
,
85 [IB_USER_VERBS_CMD_GET_CONTEXT
] = ib_uverbs_get_context
,
86 [IB_USER_VERBS_CMD_QUERY_DEVICE
] = ib_uverbs_query_device
,
87 [IB_USER_VERBS_CMD_QUERY_PORT
] = ib_uverbs_query_port
,
88 [IB_USER_VERBS_CMD_ALLOC_PD
] = ib_uverbs_alloc_pd
,
89 [IB_USER_VERBS_CMD_DEALLOC_PD
] = ib_uverbs_dealloc_pd
,
90 [IB_USER_VERBS_CMD_REG_MR
] = ib_uverbs_reg_mr
,
91 [IB_USER_VERBS_CMD_DEREG_MR
] = ib_uverbs_dereg_mr
,
92 [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL
] = ib_uverbs_create_comp_channel
,
93 [IB_USER_VERBS_CMD_CREATE_CQ
] = ib_uverbs_create_cq
,
94 [IB_USER_VERBS_CMD_POLL_CQ
] = ib_uverbs_poll_cq
,
95 [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ
] = ib_uverbs_req_notify_cq
,
96 [IB_USER_VERBS_CMD_DESTROY_CQ
] = ib_uverbs_destroy_cq
,
97 [IB_USER_VERBS_CMD_CREATE_QP
] = ib_uverbs_create_qp
,
98 [IB_USER_VERBS_CMD_MODIFY_QP
] = ib_uverbs_modify_qp
,
99 [IB_USER_VERBS_CMD_DESTROY_QP
] = ib_uverbs_destroy_qp
,
100 [IB_USER_VERBS_CMD_POST_SEND
] = ib_uverbs_post_send
,
101 [IB_USER_VERBS_CMD_POST_RECV
] = ib_uverbs_post_recv
,
102 [IB_USER_VERBS_CMD_POST_SRQ_RECV
] = ib_uverbs_post_srq_recv
,
103 [IB_USER_VERBS_CMD_CREATE_AH
] = ib_uverbs_create_ah
,
104 [IB_USER_VERBS_CMD_DESTROY_AH
] = ib_uverbs_destroy_ah
,
105 [IB_USER_VERBS_CMD_ATTACH_MCAST
] = ib_uverbs_attach_mcast
,
106 [IB_USER_VERBS_CMD_DETACH_MCAST
] = ib_uverbs_detach_mcast
,
107 [IB_USER_VERBS_CMD_CREATE_SRQ
] = ib_uverbs_create_srq
,
108 [IB_USER_VERBS_CMD_MODIFY_SRQ
] = ib_uverbs_modify_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
);
125 void ib_uverbs_release_ucq(struct ib_uverbs_file
*file
,
126 struct ib_uverbs_event_file
*ev_file
,
127 struct ib_ucq_object
*uobj
)
129 struct ib_uverbs_event
*evt
, *tmp
;
132 spin_lock_irq(&ev_file
->lock
);
133 list_for_each_entry_safe(evt
, tmp
, &uobj
->comp_list
, obj_list
) {
134 list_del(&evt
->list
);
137 spin_unlock_irq(&ev_file
->lock
);
139 kref_put(&ev_file
->ref
, ib_uverbs_release_event_file
);
142 spin_lock_irq(&file
->async_file
->lock
);
143 list_for_each_entry_safe(evt
, tmp
, &uobj
->async_list
, obj_list
) {
144 list_del(&evt
->list
);
147 spin_unlock_irq(&file
->async_file
->lock
);
150 void ib_uverbs_release_uevent(struct ib_uverbs_file
*file
,
151 struct ib_uevent_object
*uobj
)
153 struct ib_uverbs_event
*evt
, *tmp
;
155 spin_lock_irq(&file
->async_file
->lock
);
156 list_for_each_entry_safe(evt
, tmp
, &uobj
->event_list
, obj_list
) {
157 list_del(&evt
->list
);
160 spin_unlock_irq(&file
->async_file
->lock
);
163 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file
*file
,
164 struct ib_ucontext
*context
)
166 struct ib_uobject
*uobj
, *tmp
;
171 down(&ib_uverbs_idr_mutex
);
173 list_for_each_entry_safe(uobj
, tmp
, &context
->ah_list
, list
) {
174 struct ib_ah
*ah
= idr_find(&ib_uverbs_ah_idr
, uobj
->id
);
175 idr_remove(&ib_uverbs_ah_idr
, uobj
->id
);
177 list_del(&uobj
->list
);
181 list_for_each_entry_safe(uobj
, tmp
, &context
->qp_list
, list
) {
182 struct ib_qp
*qp
= idr_find(&ib_uverbs_qp_idr
, uobj
->id
);
183 struct ib_uevent_object
*uevent
=
184 container_of(uobj
, struct ib_uevent_object
, uobject
);
185 idr_remove(&ib_uverbs_qp_idr
, uobj
->id
);
187 list_del(&uobj
->list
);
188 ib_uverbs_release_uevent(file
, uevent
);
192 list_for_each_entry_safe(uobj
, tmp
, &context
->cq_list
, list
) {
193 struct ib_cq
*cq
= idr_find(&ib_uverbs_cq_idr
, uobj
->id
);
194 struct ib_uverbs_event_file
*ev_file
= cq
->cq_context
;
195 struct ib_ucq_object
*ucq
=
196 container_of(uobj
, struct ib_ucq_object
, uobject
);
197 idr_remove(&ib_uverbs_cq_idr
, uobj
->id
);
199 list_del(&uobj
->list
);
200 ib_uverbs_release_ucq(file
, ev_file
, ucq
);
204 list_for_each_entry_safe(uobj
, tmp
, &context
->srq_list
, list
) {
205 struct ib_srq
*srq
= idr_find(&ib_uverbs_srq_idr
, uobj
->id
);
206 struct ib_uevent_object
*uevent
=
207 container_of(uobj
, struct ib_uevent_object
, uobject
);
208 idr_remove(&ib_uverbs_srq_idr
, uobj
->id
);
210 list_del(&uobj
->list
);
211 ib_uverbs_release_uevent(file
, uevent
);
217 list_for_each_entry_safe(uobj
, tmp
, &context
->mr_list
, list
) {
218 struct ib_mr
*mr
= idr_find(&ib_uverbs_mr_idr
, uobj
->id
);
219 struct ib_device
*mrdev
= mr
->device
;
220 struct ib_umem_object
*memobj
;
222 idr_remove(&ib_uverbs_mr_idr
, uobj
->id
);
225 memobj
= container_of(uobj
, struct ib_umem_object
, uobject
);
226 ib_umem_release_on_close(mrdev
, &memobj
->umem
);
228 list_del(&uobj
->list
);
232 list_for_each_entry_safe(uobj
, tmp
, &context
->pd_list
, list
) {
233 struct ib_pd
*pd
= idr_find(&ib_uverbs_pd_idr
, uobj
->id
);
234 idr_remove(&ib_uverbs_pd_idr
, uobj
->id
);
236 list_del(&uobj
->list
);
240 up(&ib_uverbs_idr_mutex
);
242 return context
->device
->dealloc_ucontext(context
);
245 static void ib_uverbs_release_file(struct kref
*ref
)
247 struct ib_uverbs_file
*file
=
248 container_of(ref
, struct ib_uverbs_file
, ref
);
250 module_put(file
->device
->ib_dev
->owner
);
251 kref_put(&file
->device
->ref
, ib_uverbs_release_dev
);
256 static ssize_t
ib_uverbs_event_read(struct file
*filp
, char __user
*buf
,
257 size_t count
, loff_t
*pos
)
259 struct ib_uverbs_event_file
*file
= filp
->private_data
;
260 struct ib_uverbs_event
*event
;
264 spin_lock_irq(&file
->lock
);
266 while (list_empty(&file
->event_list
)) {
267 spin_unlock_irq(&file
->lock
);
269 if (filp
->f_flags
& O_NONBLOCK
)
272 if (wait_event_interruptible(file
->poll_wait
,
273 !list_empty(&file
->event_list
)))
276 spin_lock_irq(&file
->lock
);
279 event
= list_entry(file
->event_list
.next
, struct ib_uverbs_event
, list
);
282 eventsz
= sizeof (struct ib_uverbs_async_event_desc
);
284 eventsz
= sizeof (struct ib_uverbs_comp_event_desc
);
286 if (eventsz
> count
) {
290 list_del(file
->event_list
.next
);
291 if (event
->counter
) {
293 list_del(&event
->obj_list
);
297 spin_unlock_irq(&file
->lock
);
300 if (copy_to_user(buf
, event
, eventsz
))
311 static unsigned int ib_uverbs_event_poll(struct file
*filp
,
312 struct poll_table_struct
*wait
)
314 unsigned int pollflags
= 0;
315 struct ib_uverbs_event_file
*file
= filp
->private_data
;
317 poll_wait(filp
, &file
->poll_wait
, wait
);
319 spin_lock_irq(&file
->lock
);
320 if (!list_empty(&file
->event_list
))
321 pollflags
= POLLIN
| POLLRDNORM
;
322 spin_unlock_irq(&file
->lock
);
327 void ib_uverbs_release_event_file(struct kref
*ref
)
329 struct ib_uverbs_event_file
*file
=
330 container_of(ref
, struct ib_uverbs_event_file
, ref
);
335 static int ib_uverbs_event_fasync(int fd
, struct file
*filp
, int on
)
337 struct ib_uverbs_event_file
*file
= filp
->private_data
;
339 return fasync_helper(fd
, filp
, on
, &file
->async_queue
);
342 static int ib_uverbs_event_close(struct inode
*inode
, struct file
*filp
)
344 struct ib_uverbs_event_file
*file
= filp
->private_data
;
345 struct ib_uverbs_event
*entry
, *tmp
;
347 spin_lock_irq(&file
->lock
);
349 list_for_each_entry_safe(entry
, tmp
, &file
->event_list
, list
) {
351 list_del(&entry
->obj_list
);
354 spin_unlock_irq(&file
->lock
);
356 ib_uverbs_event_fasync(-1, filp
, 0);
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 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
);
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
->file
) {
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_uverbs_event_file
*ev_file
= context_ptr
;
446 struct ib_ucq_object
*uobj
;
448 uobj
= container_of(event
->element
.cq
->uobject
,
449 struct ib_ucq_object
, uobject
);
451 ib_uverbs_async_handler(ev_file
->uverbs_file
, uobj
->uobject
.user_handle
,
452 event
->event
, &uobj
->async_list
,
453 &uobj
->async_events_reported
);
457 void ib_uverbs_qp_event_handler(struct ib_event
*event
, void *context_ptr
)
459 struct ib_uevent_object
*uobj
;
461 uobj
= container_of(event
->element
.qp
->uobject
,
462 struct ib_uevent_object
, uobject
);
464 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
465 event
->event
, &uobj
->event_list
,
466 &uobj
->events_reported
);
469 void ib_uverbs_srq_event_handler(struct ib_event
*event
, void *context_ptr
)
471 struct ib_uevent_object
*uobj
;
473 uobj
= container_of(event
->element
.srq
->uobject
,
474 struct ib_uevent_object
, uobject
);
476 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
477 event
->event
, &uobj
->event_list
,
478 &uobj
->events_reported
);
481 void ib_uverbs_event_handler(struct ib_event_handler
*handler
,
482 struct ib_event
*event
)
484 struct ib_uverbs_file
*file
=
485 container_of(handler
, struct ib_uverbs_file
, event_handler
);
487 ib_uverbs_async_handler(file
, event
->element
.port_num
, event
->event
,
491 struct file
*ib_uverbs_alloc_event_file(struct ib_uverbs_file
*uverbs_file
,
492 int is_async
, int *fd
)
494 struct ib_uverbs_event_file
*ev_file
;
498 ev_file
= kmalloc(sizeof *ev_file
, GFP_KERNEL
);
500 return ERR_PTR(-ENOMEM
);
502 kref_init(&ev_file
->ref
);
503 spin_lock_init(&ev_file
->lock
);
504 INIT_LIST_HEAD(&ev_file
->event_list
);
505 init_waitqueue_head(&ev_file
->poll_wait
);
506 ev_file
->uverbs_file
= uverbs_file
;
507 ev_file
->async_queue
= NULL
;
508 ev_file
->is_async
= is_async
;
510 *fd
= get_unused_fd();
516 filp
= get_empty_filp();
522 ev_file
->file
= filp
;
525 * fops_get() can't fail here, because we're coming from a
526 * system call on a uverbs file, which will already have a
529 filp
->f_op
= fops_get(&uverbs_event_fops
);
530 filp
->f_vfsmnt
= mntget(uverbs_event_mnt
);
531 filp
->f_dentry
= dget(uverbs_event_mnt
->mnt_root
);
532 filp
->f_mapping
= filp
->f_dentry
->d_inode
->i_mapping
;
533 filp
->f_flags
= O_RDONLY
;
534 filp
->f_mode
= FMODE_READ
;
535 filp
->private_data
= ev_file
;
548 * Look up a completion event file by FD. If lookup is successful,
549 * takes a ref to the event file struct that it returns; if
550 * unsuccessful, returns NULL.
552 struct ib_uverbs_event_file
*ib_uverbs_lookup_comp_file(int fd
)
554 struct ib_uverbs_event_file
*ev_file
= NULL
;
561 if (filp
->f_op
!= &uverbs_event_fops
)
564 ev_file
= filp
->private_data
;
565 if (ev_file
->is_async
) {
570 kref_get(&ev_file
->ref
);
577 static ssize_t
ib_uverbs_write(struct file
*filp
, const char __user
*buf
,
578 size_t count
, loff_t
*pos
)
580 struct ib_uverbs_file
*file
= filp
->private_data
;
581 struct ib_uverbs_cmd_hdr hdr
;
583 if (count
< sizeof hdr
)
586 if (copy_from_user(&hdr
, buf
, sizeof hdr
))
589 if (hdr
.in_words
* 4 != count
)
592 if (hdr
.command
< 0 ||
593 hdr
.command
>= ARRAY_SIZE(uverbs_cmd_table
) ||
594 !uverbs_cmd_table
[hdr
.command
] ||
595 !(file
->device
->ib_dev
->uverbs_cmd_mask
& (1ull << hdr
.command
)))
598 if (!file
->ucontext
&&
599 hdr
.command
!= IB_USER_VERBS_CMD_GET_CONTEXT
)
602 return uverbs_cmd_table
[hdr
.command
](file
, buf
+ sizeof hdr
,
603 hdr
.in_words
* 4, hdr
.out_words
* 4);
606 static int ib_uverbs_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
608 struct ib_uverbs_file
*file
= filp
->private_data
;
613 return file
->device
->ib_dev
->mmap(file
->ucontext
, vma
);
616 static int ib_uverbs_open(struct inode
*inode
, struct file
*filp
)
618 struct ib_uverbs_device
*dev
;
619 struct ib_uverbs_file
*file
;
622 spin_lock(&map_lock
);
623 dev
= dev_table
[iminor(inode
) - IB_UVERBS_BASE_MINOR
];
626 spin_unlock(&map_lock
);
631 if (!try_module_get(dev
->ib_dev
->owner
)) {
636 file
= kmalloc(sizeof *file
, GFP_KERNEL
);
643 file
->ucontext
= NULL
;
644 file
->async_file
= NULL
;
645 kref_init(&file
->ref
);
646 init_MUTEX(&file
->mutex
);
648 filp
->private_data
= file
;
653 module_put(dev
->ib_dev
->owner
);
656 kref_put(&dev
->ref
, ib_uverbs_release_dev
);
661 static int ib_uverbs_close(struct inode
*inode
, struct file
*filp
)
663 struct ib_uverbs_file
*file
= filp
->private_data
;
665 ib_uverbs_cleanup_ucontext(file
, file
->ucontext
);
667 if (file
->async_file
)
668 kref_put(&file
->async_file
->ref
, ib_uverbs_release_event_file
);
670 kref_put(&file
->ref
, ib_uverbs_release_file
);
675 static struct file_operations uverbs_fops
= {
676 .owner
= THIS_MODULE
,
677 .write
= ib_uverbs_write
,
678 .open
= ib_uverbs_open
,
679 .release
= ib_uverbs_close
682 static struct file_operations uverbs_mmap_fops
= {
683 .owner
= THIS_MODULE
,
684 .write
= ib_uverbs_write
,
685 .mmap
= ib_uverbs_mmap
,
686 .open
= ib_uverbs_open
,
687 .release
= ib_uverbs_close
690 static struct ib_client uverbs_client
= {
692 .add
= ib_uverbs_add_one
,
693 .remove
= ib_uverbs_remove_one
696 static ssize_t
show_ibdev(struct class_device
*class_dev
, char *buf
)
698 struct ib_uverbs_device
*dev
= class_get_devdata(class_dev
);
703 return sprintf(buf
, "%s\n", dev
->ib_dev
->name
);
705 static CLASS_DEVICE_ATTR(ibdev
, S_IRUGO
, show_ibdev
, NULL
);
707 static ssize_t
show_dev_abi_version(struct class_device
*class_dev
, char *buf
)
709 struct ib_uverbs_device
*dev
= class_get_devdata(class_dev
);
714 return sprintf(buf
, "%d\n", dev
->ib_dev
->uverbs_abi_ver
);
716 static CLASS_DEVICE_ATTR(abi_version
, S_IRUGO
, show_dev_abi_version
, NULL
);
718 static ssize_t
show_abi_version(struct class *class, char *buf
)
720 return sprintf(buf
, "%d\n", IB_USER_VERBS_ABI_VERSION
);
722 static CLASS_ATTR(abi_version
, S_IRUGO
, show_abi_version
, NULL
);
724 static void ib_uverbs_add_one(struct ib_device
*device
)
726 struct ib_uverbs_device
*uverbs_dev
;
728 if (!device
->alloc_ucontext
)
731 uverbs_dev
= kmalloc(sizeof *uverbs_dev
, GFP_KERNEL
);
735 memset(uverbs_dev
, 0, sizeof *uverbs_dev
);
737 kref_init(&uverbs_dev
->ref
);
739 spin_lock(&map_lock
);
740 uverbs_dev
->devnum
= find_first_zero_bit(dev_map
, IB_UVERBS_MAX_DEVICES
);
741 if (uverbs_dev
->devnum
>= IB_UVERBS_MAX_DEVICES
) {
742 spin_unlock(&map_lock
);
745 set_bit(uverbs_dev
->devnum
, dev_map
);
746 spin_unlock(&map_lock
);
748 uverbs_dev
->ib_dev
= device
;
749 uverbs_dev
->num_comp_vectors
= 1;
751 uverbs_dev
->dev
= cdev_alloc();
752 if (!uverbs_dev
->dev
)
754 uverbs_dev
->dev
->owner
= THIS_MODULE
;
755 uverbs_dev
->dev
->ops
= device
->mmap
? &uverbs_mmap_fops
: &uverbs_fops
;
756 kobject_set_name(&uverbs_dev
->dev
->kobj
, "uverbs%d", uverbs_dev
->devnum
);
757 if (cdev_add(uverbs_dev
->dev
, IB_UVERBS_BASE_DEV
+ uverbs_dev
->devnum
, 1))
760 uverbs_dev
->class_dev
= class_device_create(uverbs_class
, NULL
,
761 uverbs_dev
->dev
->dev
,
763 "uverbs%d", uverbs_dev
->devnum
);
764 if (IS_ERR(uverbs_dev
->class_dev
))
767 class_set_devdata(uverbs_dev
->class_dev
, uverbs_dev
);
769 if (class_device_create_file(uverbs_dev
->class_dev
, &class_device_attr_ibdev
))
771 if (class_device_create_file(uverbs_dev
->class_dev
, &class_device_attr_abi_version
))
774 spin_lock(&map_lock
);
775 dev_table
[uverbs_dev
->devnum
] = uverbs_dev
;
776 spin_unlock(&map_lock
);
778 ib_set_client_data(device
, &uverbs_client
, uverbs_dev
);
783 class_device_destroy(uverbs_class
, uverbs_dev
->dev
->dev
);
786 cdev_del(uverbs_dev
->dev
);
787 clear_bit(uverbs_dev
->devnum
, dev_map
);
790 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
794 static void ib_uverbs_remove_one(struct ib_device
*device
)
796 struct ib_uverbs_device
*uverbs_dev
= ib_get_client_data(device
, &uverbs_client
);
801 class_set_devdata(uverbs_dev
->class_dev
, NULL
);
802 class_device_destroy(uverbs_class
, uverbs_dev
->dev
->dev
);
803 cdev_del(uverbs_dev
->dev
);
805 spin_lock(&map_lock
);
806 dev_table
[uverbs_dev
->devnum
] = NULL
;
807 spin_unlock(&map_lock
);
809 clear_bit(uverbs_dev
->devnum
, dev_map
);
810 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
813 static struct super_block
*uverbs_event_get_sb(struct file_system_type
*fs_type
, int flags
,
814 const char *dev_name
, void *data
)
816 return get_sb_pseudo(fs_type
, "infinibandevent:", NULL
,
817 INFINIBANDEVENTFS_MAGIC
);
820 static struct file_system_type uverbs_event_fs
= {
821 /* No owner field so module can be unloaded */
822 .name
= "infinibandeventfs",
823 .get_sb
= uverbs_event_get_sb
,
824 .kill_sb
= kill_litter_super
827 static int __init
ib_uverbs_init(void)
831 spin_lock_init(&map_lock
);
833 ret
= register_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
,
836 printk(KERN_ERR
"user_verbs: couldn't register device number\n");
840 uverbs_class
= class_create(THIS_MODULE
, "infiniband_verbs");
841 if (IS_ERR(uverbs_class
)) {
842 ret
= PTR_ERR(uverbs_class
);
843 printk(KERN_ERR
"user_verbs: couldn't create class infiniband_verbs\n");
847 ret
= class_create_file(uverbs_class
, &class_attr_abi_version
);
849 printk(KERN_ERR
"user_verbs: couldn't create abi_version attribute\n");
853 ret
= register_filesystem(&uverbs_event_fs
);
855 printk(KERN_ERR
"user_verbs: couldn't register infinibandeventfs\n");
859 uverbs_event_mnt
= kern_mount(&uverbs_event_fs
);
860 if (IS_ERR(uverbs_event_mnt
)) {
861 ret
= PTR_ERR(uverbs_event_mnt
);
862 printk(KERN_ERR
"user_verbs: couldn't mount infinibandeventfs\n");
866 ret
= ib_register_client(&uverbs_client
);
868 printk(KERN_ERR
"user_verbs: couldn't register client\n");
875 mntput(uverbs_event_mnt
);
878 unregister_filesystem(&uverbs_event_fs
);
881 class_destroy(uverbs_class
);
884 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
890 static void __exit
ib_uverbs_cleanup(void)
892 ib_unregister_client(&uverbs_client
);
893 mntput(uverbs_event_mnt
);
894 unregister_filesystem(&uverbs_event_fs
);
895 class_destroy(uverbs_class
);
896 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
897 idr_destroy(&ib_uverbs_pd_idr
);
898 idr_destroy(&ib_uverbs_mr_idr
);
899 idr_destroy(&ib_uverbs_mw_idr
);
900 idr_destroy(&ib_uverbs_ah_idr
);
901 idr_destroy(&ib_uverbs_cq_idr
);
902 idr_destroy(&ib_uverbs_qp_idr
);
903 idr_destroy(&ib_uverbs_srq_idr
);
906 module_init(ib_uverbs_init
);
907 module_exit(ib_uverbs_cleanup
);