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 DEFINE_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 void ib_uverbs_detach_umcast(struct ib_qp
*qp
,
164 struct ib_uqp_object
*uobj
)
166 struct ib_uverbs_mcast_entry
*mcast
, *tmp
;
168 list_for_each_entry_safe(mcast
, tmp
, &uobj
->mcast_list
, list
) {
169 ib_detach_mcast(qp
, &mcast
->gid
, mcast
->lid
);
170 list_del(&mcast
->list
);
175 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file
*file
,
176 struct ib_ucontext
*context
)
178 struct ib_uobject
*uobj
, *tmp
;
183 mutex_lock(&ib_uverbs_idr_mutex
);
185 list_for_each_entry_safe(uobj
, tmp
, &context
->ah_list
, list
) {
186 struct ib_ah
*ah
= idr_find(&ib_uverbs_ah_idr
, uobj
->id
);
187 idr_remove(&ib_uverbs_ah_idr
, uobj
->id
);
189 list_del(&uobj
->list
);
193 list_for_each_entry_safe(uobj
, tmp
, &context
->qp_list
, list
) {
194 struct ib_qp
*qp
= idr_find(&ib_uverbs_qp_idr
, uobj
->id
);
195 struct ib_uqp_object
*uqp
=
196 container_of(uobj
, struct ib_uqp_object
, uevent
.uobject
);
197 idr_remove(&ib_uverbs_qp_idr
, uobj
->id
);
198 ib_uverbs_detach_umcast(qp
, uqp
);
200 list_del(&uobj
->list
);
201 ib_uverbs_release_uevent(file
, &uqp
->uevent
);
205 list_for_each_entry_safe(uobj
, tmp
, &context
->cq_list
, list
) {
206 struct ib_cq
*cq
= idr_find(&ib_uverbs_cq_idr
, uobj
->id
);
207 struct ib_uverbs_event_file
*ev_file
= cq
->cq_context
;
208 struct ib_ucq_object
*ucq
=
209 container_of(uobj
, struct ib_ucq_object
, uobject
);
210 idr_remove(&ib_uverbs_cq_idr
, uobj
->id
);
212 list_del(&uobj
->list
);
213 ib_uverbs_release_ucq(file
, ev_file
, ucq
);
217 list_for_each_entry_safe(uobj
, tmp
, &context
->srq_list
, list
) {
218 struct ib_srq
*srq
= idr_find(&ib_uverbs_srq_idr
, uobj
->id
);
219 struct ib_uevent_object
*uevent
=
220 container_of(uobj
, struct ib_uevent_object
, uobject
);
221 idr_remove(&ib_uverbs_srq_idr
, uobj
->id
);
223 list_del(&uobj
->list
);
224 ib_uverbs_release_uevent(file
, uevent
);
230 list_for_each_entry_safe(uobj
, tmp
, &context
->mr_list
, list
) {
231 struct ib_mr
*mr
= idr_find(&ib_uverbs_mr_idr
, uobj
->id
);
232 struct ib_device
*mrdev
= mr
->device
;
233 struct ib_umem_object
*memobj
;
235 idr_remove(&ib_uverbs_mr_idr
, uobj
->id
);
238 memobj
= container_of(uobj
, struct ib_umem_object
, uobject
);
239 ib_umem_release_on_close(mrdev
, &memobj
->umem
);
241 list_del(&uobj
->list
);
245 list_for_each_entry_safe(uobj
, tmp
, &context
->pd_list
, list
) {
246 struct ib_pd
*pd
= idr_find(&ib_uverbs_pd_idr
, uobj
->id
);
247 idr_remove(&ib_uverbs_pd_idr
, uobj
->id
);
249 list_del(&uobj
->list
);
253 mutex_unlock(&ib_uverbs_idr_mutex
);
255 return context
->device
->dealloc_ucontext(context
);
258 static void ib_uverbs_release_file(struct kref
*ref
)
260 struct ib_uverbs_file
*file
=
261 container_of(ref
, struct ib_uverbs_file
, ref
);
263 module_put(file
->device
->ib_dev
->owner
);
264 kref_put(&file
->device
->ref
, ib_uverbs_release_dev
);
269 static ssize_t
ib_uverbs_event_read(struct file
*filp
, char __user
*buf
,
270 size_t count
, loff_t
*pos
)
272 struct ib_uverbs_event_file
*file
= filp
->private_data
;
273 struct ib_uverbs_event
*event
;
277 spin_lock_irq(&file
->lock
);
279 while (list_empty(&file
->event_list
)) {
280 spin_unlock_irq(&file
->lock
);
282 if (filp
->f_flags
& O_NONBLOCK
)
285 if (wait_event_interruptible(file
->poll_wait
,
286 !list_empty(&file
->event_list
)))
289 spin_lock_irq(&file
->lock
);
292 event
= list_entry(file
->event_list
.next
, struct ib_uverbs_event
, list
);
295 eventsz
= sizeof (struct ib_uverbs_async_event_desc
);
297 eventsz
= sizeof (struct ib_uverbs_comp_event_desc
);
299 if (eventsz
> count
) {
303 list_del(file
->event_list
.next
);
304 if (event
->counter
) {
306 list_del(&event
->obj_list
);
310 spin_unlock_irq(&file
->lock
);
313 if (copy_to_user(buf
, event
, eventsz
))
324 static unsigned int ib_uverbs_event_poll(struct file
*filp
,
325 struct poll_table_struct
*wait
)
327 unsigned int pollflags
= 0;
328 struct ib_uverbs_event_file
*file
= filp
->private_data
;
330 poll_wait(filp
, &file
->poll_wait
, wait
);
332 spin_lock_irq(&file
->lock
);
333 if (!list_empty(&file
->event_list
))
334 pollflags
= POLLIN
| POLLRDNORM
;
335 spin_unlock_irq(&file
->lock
);
340 void ib_uverbs_release_event_file(struct kref
*ref
)
342 struct ib_uverbs_event_file
*file
=
343 container_of(ref
, struct ib_uverbs_event_file
, ref
);
348 static int ib_uverbs_event_fasync(int fd
, struct file
*filp
, int on
)
350 struct ib_uverbs_event_file
*file
= filp
->private_data
;
352 return fasync_helper(fd
, filp
, on
, &file
->async_queue
);
355 static int ib_uverbs_event_close(struct inode
*inode
, struct file
*filp
)
357 struct ib_uverbs_event_file
*file
= filp
->private_data
;
358 struct ib_uverbs_event
*entry
, *tmp
;
360 spin_lock_irq(&file
->lock
);
362 list_for_each_entry_safe(entry
, tmp
, &file
->event_list
, list
) {
364 list_del(&entry
->obj_list
);
367 spin_unlock_irq(&file
->lock
);
369 ib_uverbs_event_fasync(-1, filp
, 0);
371 if (file
->is_async
) {
372 ib_unregister_event_handler(&file
->uverbs_file
->event_handler
);
373 kref_put(&file
->uverbs_file
->ref
, ib_uverbs_release_file
);
375 kref_put(&file
->ref
, ib_uverbs_release_event_file
);
380 static struct file_operations uverbs_event_fops
= {
381 .owner
= THIS_MODULE
,
382 .read
= ib_uverbs_event_read
,
383 .poll
= ib_uverbs_event_poll
,
384 .release
= ib_uverbs_event_close
,
385 .fasync
= ib_uverbs_event_fasync
388 void ib_uverbs_comp_handler(struct ib_cq
*cq
, void *cq_context
)
390 struct ib_uverbs_event_file
*file
= cq_context
;
391 struct ib_ucq_object
*uobj
;
392 struct ib_uverbs_event
*entry
;
398 spin_lock_irqsave(&file
->lock
, flags
);
400 spin_unlock_irqrestore(&file
->lock
, flags
);
404 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
406 spin_unlock_irqrestore(&file
->lock
, flags
);
410 uobj
= container_of(cq
->uobject
, struct ib_ucq_object
, uobject
);
412 entry
->desc
.comp
.cq_handle
= cq
->uobject
->user_handle
;
413 entry
->counter
= &uobj
->comp_events_reported
;
415 list_add_tail(&entry
->list
, &file
->event_list
);
416 list_add_tail(&entry
->obj_list
, &uobj
->comp_list
);
417 spin_unlock_irqrestore(&file
->lock
, flags
);
419 wake_up_interruptible(&file
->poll_wait
);
420 kill_fasync(&file
->async_queue
, SIGIO
, POLL_IN
);
423 static void ib_uverbs_async_handler(struct ib_uverbs_file
*file
,
424 __u64 element
, __u64 event
,
425 struct list_head
*obj_list
,
428 struct ib_uverbs_event
*entry
;
431 spin_lock_irqsave(&file
->async_file
->lock
, flags
);
432 if (!file
->async_file
->file
) {
433 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
437 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
439 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
443 entry
->desc
.async
.element
= element
;
444 entry
->desc
.async
.event_type
= event
;
445 entry
->counter
= counter
;
447 list_add_tail(&entry
->list
, &file
->async_file
->event_list
);
449 list_add_tail(&entry
->obj_list
, obj_list
);
450 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
452 wake_up_interruptible(&file
->async_file
->poll_wait
);
453 kill_fasync(&file
->async_file
->async_queue
, SIGIO
, POLL_IN
);
456 void ib_uverbs_cq_event_handler(struct ib_event
*event
, void *context_ptr
)
458 struct ib_ucq_object
*uobj
= container_of(event
->element
.cq
->uobject
,
459 struct ib_ucq_object
, uobject
);
461 ib_uverbs_async_handler(uobj
->uverbs_file
, uobj
->uobject
.user_handle
,
462 event
->event
, &uobj
->async_list
,
463 &uobj
->async_events_reported
);
467 void ib_uverbs_qp_event_handler(struct ib_event
*event
, void *context_ptr
)
469 struct ib_uevent_object
*uobj
;
471 uobj
= container_of(event
->element
.qp
->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_srq_event_handler(struct ib_event
*event
, void *context_ptr
)
481 struct ib_uevent_object
*uobj
;
483 uobj
= container_of(event
->element
.srq
->uobject
,
484 struct ib_uevent_object
, uobject
);
486 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
487 event
->event
, &uobj
->event_list
,
488 &uobj
->events_reported
);
491 void ib_uverbs_event_handler(struct ib_event_handler
*handler
,
492 struct ib_event
*event
)
494 struct ib_uverbs_file
*file
=
495 container_of(handler
, struct ib_uverbs_file
, event_handler
);
497 ib_uverbs_async_handler(file
, event
->element
.port_num
, event
->event
,
501 struct file
*ib_uverbs_alloc_event_file(struct ib_uverbs_file
*uverbs_file
,
502 int is_async
, int *fd
)
504 struct ib_uverbs_event_file
*ev_file
;
508 ev_file
= kmalloc(sizeof *ev_file
, GFP_KERNEL
);
510 return ERR_PTR(-ENOMEM
);
512 kref_init(&ev_file
->ref
);
513 spin_lock_init(&ev_file
->lock
);
514 INIT_LIST_HEAD(&ev_file
->event_list
);
515 init_waitqueue_head(&ev_file
->poll_wait
);
516 ev_file
->uverbs_file
= uverbs_file
;
517 ev_file
->async_queue
= NULL
;
518 ev_file
->is_async
= is_async
;
520 *fd
= get_unused_fd();
526 filp
= get_empty_filp();
532 ev_file
->file
= filp
;
535 * fops_get() can't fail here, because we're coming from a
536 * system call on a uverbs file, which will already have a
539 filp
->f_op
= fops_get(&uverbs_event_fops
);
540 filp
->f_vfsmnt
= mntget(uverbs_event_mnt
);
541 filp
->f_dentry
= dget(uverbs_event_mnt
->mnt_root
);
542 filp
->f_mapping
= filp
->f_dentry
->d_inode
->i_mapping
;
543 filp
->f_flags
= O_RDONLY
;
544 filp
->f_mode
= FMODE_READ
;
545 filp
->private_data
= ev_file
;
558 * Look up a completion event file by FD. If lookup is successful,
559 * takes a ref to the event file struct that it returns; if
560 * unsuccessful, returns NULL.
562 struct ib_uverbs_event_file
*ib_uverbs_lookup_comp_file(int fd
)
564 struct ib_uverbs_event_file
*ev_file
= NULL
;
571 if (filp
->f_op
!= &uverbs_event_fops
)
574 ev_file
= filp
->private_data
;
575 if (ev_file
->is_async
) {
580 kref_get(&ev_file
->ref
);
587 static ssize_t
ib_uverbs_write(struct file
*filp
, const char __user
*buf
,
588 size_t count
, loff_t
*pos
)
590 struct ib_uverbs_file
*file
= filp
->private_data
;
591 struct ib_uverbs_cmd_hdr hdr
;
593 if (count
< sizeof hdr
)
596 if (copy_from_user(&hdr
, buf
, sizeof hdr
))
599 if (hdr
.in_words
* 4 != count
)
602 if (hdr
.command
< 0 ||
603 hdr
.command
>= ARRAY_SIZE(uverbs_cmd_table
) ||
604 !uverbs_cmd_table
[hdr
.command
] ||
605 !(file
->device
->ib_dev
->uverbs_cmd_mask
& (1ull << hdr
.command
)))
608 if (!file
->ucontext
&&
609 hdr
.command
!= IB_USER_VERBS_CMD_GET_CONTEXT
)
612 return uverbs_cmd_table
[hdr
.command
](file
, buf
+ sizeof hdr
,
613 hdr
.in_words
* 4, hdr
.out_words
* 4);
616 static int ib_uverbs_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
618 struct ib_uverbs_file
*file
= filp
->private_data
;
623 return file
->device
->ib_dev
->mmap(file
->ucontext
, vma
);
626 static int ib_uverbs_open(struct inode
*inode
, struct file
*filp
)
628 struct ib_uverbs_device
*dev
;
629 struct ib_uverbs_file
*file
;
632 spin_lock(&map_lock
);
633 dev
= dev_table
[iminor(inode
) - IB_UVERBS_BASE_MINOR
];
636 spin_unlock(&map_lock
);
641 if (!try_module_get(dev
->ib_dev
->owner
)) {
646 file
= kmalloc(sizeof *file
, GFP_KERNEL
);
653 file
->ucontext
= NULL
;
654 file
->async_file
= NULL
;
655 kref_init(&file
->ref
);
656 mutex_init(&file
->mutex
);
658 filp
->private_data
= file
;
663 module_put(dev
->ib_dev
->owner
);
666 kref_put(&dev
->ref
, ib_uverbs_release_dev
);
671 static int ib_uverbs_close(struct inode
*inode
, struct file
*filp
)
673 struct ib_uverbs_file
*file
= filp
->private_data
;
675 ib_uverbs_cleanup_ucontext(file
, file
->ucontext
);
677 if (file
->async_file
)
678 kref_put(&file
->async_file
->ref
, ib_uverbs_release_event_file
);
680 kref_put(&file
->ref
, ib_uverbs_release_file
);
685 static struct file_operations uverbs_fops
= {
686 .owner
= THIS_MODULE
,
687 .write
= ib_uverbs_write
,
688 .open
= ib_uverbs_open
,
689 .release
= ib_uverbs_close
692 static struct file_operations uverbs_mmap_fops
= {
693 .owner
= THIS_MODULE
,
694 .write
= ib_uverbs_write
,
695 .mmap
= ib_uverbs_mmap
,
696 .open
= ib_uverbs_open
,
697 .release
= ib_uverbs_close
700 static struct ib_client uverbs_client
= {
702 .add
= ib_uverbs_add_one
,
703 .remove
= ib_uverbs_remove_one
706 static ssize_t
show_ibdev(struct class_device
*class_dev
, char *buf
)
708 struct ib_uverbs_device
*dev
= class_get_devdata(class_dev
);
713 return sprintf(buf
, "%s\n", dev
->ib_dev
->name
);
715 static CLASS_DEVICE_ATTR(ibdev
, S_IRUGO
, show_ibdev
, NULL
);
717 static ssize_t
show_dev_abi_version(struct class_device
*class_dev
, char *buf
)
719 struct ib_uverbs_device
*dev
= class_get_devdata(class_dev
);
724 return sprintf(buf
, "%d\n", dev
->ib_dev
->uverbs_abi_ver
);
726 static CLASS_DEVICE_ATTR(abi_version
, S_IRUGO
, show_dev_abi_version
, NULL
);
728 static ssize_t
show_abi_version(struct class *class, char *buf
)
730 return sprintf(buf
, "%d\n", IB_USER_VERBS_ABI_VERSION
);
732 static CLASS_ATTR(abi_version
, S_IRUGO
, show_abi_version
, NULL
);
734 static void ib_uverbs_add_one(struct ib_device
*device
)
736 struct ib_uverbs_device
*uverbs_dev
;
738 if (!device
->alloc_ucontext
)
741 uverbs_dev
= kzalloc(sizeof *uverbs_dev
, GFP_KERNEL
);
745 kref_init(&uverbs_dev
->ref
);
747 spin_lock(&map_lock
);
748 uverbs_dev
->devnum
= find_first_zero_bit(dev_map
, IB_UVERBS_MAX_DEVICES
);
749 if (uverbs_dev
->devnum
>= IB_UVERBS_MAX_DEVICES
) {
750 spin_unlock(&map_lock
);
753 set_bit(uverbs_dev
->devnum
, dev_map
);
754 spin_unlock(&map_lock
);
756 uverbs_dev
->ib_dev
= device
;
757 uverbs_dev
->num_comp_vectors
= 1;
759 uverbs_dev
->dev
= cdev_alloc();
760 if (!uverbs_dev
->dev
)
762 uverbs_dev
->dev
->owner
= THIS_MODULE
;
763 uverbs_dev
->dev
->ops
= device
->mmap
? &uverbs_mmap_fops
: &uverbs_fops
;
764 kobject_set_name(&uverbs_dev
->dev
->kobj
, "uverbs%d", uverbs_dev
->devnum
);
765 if (cdev_add(uverbs_dev
->dev
, IB_UVERBS_BASE_DEV
+ uverbs_dev
->devnum
, 1))
768 uverbs_dev
->class_dev
= class_device_create(uverbs_class
, NULL
,
769 uverbs_dev
->dev
->dev
,
771 "uverbs%d", uverbs_dev
->devnum
);
772 if (IS_ERR(uverbs_dev
->class_dev
))
775 class_set_devdata(uverbs_dev
->class_dev
, uverbs_dev
);
777 if (class_device_create_file(uverbs_dev
->class_dev
, &class_device_attr_ibdev
))
779 if (class_device_create_file(uverbs_dev
->class_dev
, &class_device_attr_abi_version
))
782 spin_lock(&map_lock
);
783 dev_table
[uverbs_dev
->devnum
] = uverbs_dev
;
784 spin_unlock(&map_lock
);
786 ib_set_client_data(device
, &uverbs_client
, uverbs_dev
);
791 class_device_destroy(uverbs_class
, uverbs_dev
->dev
->dev
);
794 cdev_del(uverbs_dev
->dev
);
795 clear_bit(uverbs_dev
->devnum
, dev_map
);
798 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
802 static void ib_uverbs_remove_one(struct ib_device
*device
)
804 struct ib_uverbs_device
*uverbs_dev
= ib_get_client_data(device
, &uverbs_client
);
809 class_set_devdata(uverbs_dev
->class_dev
, NULL
);
810 class_device_destroy(uverbs_class
, uverbs_dev
->dev
->dev
);
811 cdev_del(uverbs_dev
->dev
);
813 spin_lock(&map_lock
);
814 dev_table
[uverbs_dev
->devnum
] = NULL
;
815 spin_unlock(&map_lock
);
817 clear_bit(uverbs_dev
->devnum
, dev_map
);
818 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
821 static struct super_block
*uverbs_event_get_sb(struct file_system_type
*fs_type
, int flags
,
822 const char *dev_name
, void *data
)
824 return get_sb_pseudo(fs_type
, "infinibandevent:", NULL
,
825 INFINIBANDEVENTFS_MAGIC
);
828 static struct file_system_type uverbs_event_fs
= {
829 /* No owner field so module can be unloaded */
830 .name
= "infinibandeventfs",
831 .get_sb
= uverbs_event_get_sb
,
832 .kill_sb
= kill_litter_super
835 static int __init
ib_uverbs_init(void)
839 spin_lock_init(&map_lock
);
841 ret
= register_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
,
844 printk(KERN_ERR
"user_verbs: couldn't register device number\n");
848 uverbs_class
= class_create(THIS_MODULE
, "infiniband_verbs");
849 if (IS_ERR(uverbs_class
)) {
850 ret
= PTR_ERR(uverbs_class
);
851 printk(KERN_ERR
"user_verbs: couldn't create class infiniband_verbs\n");
855 ret
= class_create_file(uverbs_class
, &class_attr_abi_version
);
857 printk(KERN_ERR
"user_verbs: couldn't create abi_version attribute\n");
861 ret
= register_filesystem(&uverbs_event_fs
);
863 printk(KERN_ERR
"user_verbs: couldn't register infinibandeventfs\n");
867 uverbs_event_mnt
= kern_mount(&uverbs_event_fs
);
868 if (IS_ERR(uverbs_event_mnt
)) {
869 ret
= PTR_ERR(uverbs_event_mnt
);
870 printk(KERN_ERR
"user_verbs: couldn't mount infinibandeventfs\n");
874 ret
= ib_register_client(&uverbs_client
);
876 printk(KERN_ERR
"user_verbs: couldn't register client\n");
883 mntput(uverbs_event_mnt
);
886 unregister_filesystem(&uverbs_event_fs
);
889 class_destroy(uverbs_class
);
892 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
898 static void __exit
ib_uverbs_cleanup(void)
900 ib_unregister_client(&uverbs_client
);
901 mntput(uverbs_event_mnt
);
902 unregister_filesystem(&uverbs_event_fs
);
903 class_destroy(uverbs_class
);
904 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
905 idr_destroy(&ib_uverbs_pd_idr
);
906 idr_destroy(&ib_uverbs_mr_idr
);
907 idr_destroy(&ib_uverbs_mw_idr
);
908 idr_destroy(&ib_uverbs_ah_idr
);
909 idr_destroy(&ib_uverbs_cq_idr
);
910 idr_destroy(&ib_uverbs_qp_idr
);
911 idr_destroy(&ib_uverbs_srq_idr
);
914 module_init(ib_uverbs_init
);
915 module_exit(ib_uverbs_cleanup
);