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
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_RESIZE_CQ
] = ib_uverbs_resize_cq
,
95 [IB_USER_VERBS_CMD_POLL_CQ
] = ib_uverbs_poll_cq
,
96 [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ
] = ib_uverbs_req_notify_cq
,
97 [IB_USER_VERBS_CMD_DESTROY_CQ
] = ib_uverbs_destroy_cq
,
98 [IB_USER_VERBS_CMD_CREATE_QP
] = ib_uverbs_create_qp
,
99 [IB_USER_VERBS_CMD_MODIFY_QP
] = ib_uverbs_modify_qp
,
100 [IB_USER_VERBS_CMD_DESTROY_QP
] = ib_uverbs_destroy_qp
,
101 [IB_USER_VERBS_CMD_POST_SEND
] = ib_uverbs_post_send
,
102 [IB_USER_VERBS_CMD_POST_RECV
] = ib_uverbs_post_recv
,
103 [IB_USER_VERBS_CMD_POST_SRQ_RECV
] = ib_uverbs_post_srq_recv
,
104 [IB_USER_VERBS_CMD_CREATE_AH
] = ib_uverbs_create_ah
,
105 [IB_USER_VERBS_CMD_DESTROY_AH
] = ib_uverbs_destroy_ah
,
106 [IB_USER_VERBS_CMD_ATTACH_MCAST
] = ib_uverbs_attach_mcast
,
107 [IB_USER_VERBS_CMD_DETACH_MCAST
] = ib_uverbs_detach_mcast
,
108 [IB_USER_VERBS_CMD_CREATE_SRQ
] = ib_uverbs_create_srq
,
109 [IB_USER_VERBS_CMD_MODIFY_SRQ
] = ib_uverbs_modify_srq
,
110 [IB_USER_VERBS_CMD_DESTROY_SRQ
] = ib_uverbs_destroy_srq
,
113 static struct vfsmount
*uverbs_event_mnt
;
115 static void ib_uverbs_add_one(struct ib_device
*device
);
116 static void ib_uverbs_remove_one(struct ib_device
*device
);
118 static void ib_uverbs_release_dev(struct kref
*ref
)
120 struct ib_uverbs_device
*dev
=
121 container_of(ref
, struct ib_uverbs_device
, ref
);
126 void ib_uverbs_release_ucq(struct ib_uverbs_file
*file
,
127 struct ib_uverbs_event_file
*ev_file
,
128 struct ib_ucq_object
*uobj
)
130 struct ib_uverbs_event
*evt
, *tmp
;
133 spin_lock_irq(&ev_file
->lock
);
134 list_for_each_entry_safe(evt
, tmp
, &uobj
->comp_list
, obj_list
) {
135 list_del(&evt
->list
);
138 spin_unlock_irq(&ev_file
->lock
);
140 kref_put(&ev_file
->ref
, ib_uverbs_release_event_file
);
143 spin_lock_irq(&file
->async_file
->lock
);
144 list_for_each_entry_safe(evt
, tmp
, &uobj
->async_list
, obj_list
) {
145 list_del(&evt
->list
);
148 spin_unlock_irq(&file
->async_file
->lock
);
151 void ib_uverbs_release_uevent(struct ib_uverbs_file
*file
,
152 struct ib_uevent_object
*uobj
)
154 struct ib_uverbs_event
*evt
, *tmp
;
156 spin_lock_irq(&file
->async_file
->lock
);
157 list_for_each_entry_safe(evt
, tmp
, &uobj
->event_list
, obj_list
) {
158 list_del(&evt
->list
);
161 spin_unlock_irq(&file
->async_file
->lock
);
164 static void ib_uverbs_detach_umcast(struct ib_qp
*qp
,
165 struct ib_uqp_object
*uobj
)
167 struct ib_uverbs_mcast_entry
*mcast
, *tmp
;
169 list_for_each_entry_safe(mcast
, tmp
, &uobj
->mcast_list
, list
) {
170 ib_detach_mcast(qp
, &mcast
->gid
, mcast
->lid
);
171 list_del(&mcast
->list
);
176 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file
*file
,
177 struct ib_ucontext
*context
)
179 struct ib_uobject
*uobj
, *tmp
;
184 mutex_lock(&ib_uverbs_idr_mutex
);
186 list_for_each_entry_safe(uobj
, tmp
, &context
->ah_list
, list
) {
187 struct ib_ah
*ah
= idr_find(&ib_uverbs_ah_idr
, uobj
->id
);
188 idr_remove(&ib_uverbs_ah_idr
, uobj
->id
);
190 list_del(&uobj
->list
);
194 list_for_each_entry_safe(uobj
, tmp
, &context
->qp_list
, list
) {
195 struct ib_qp
*qp
= idr_find(&ib_uverbs_qp_idr
, uobj
->id
);
196 struct ib_uqp_object
*uqp
=
197 container_of(uobj
, struct ib_uqp_object
, uevent
.uobject
);
198 idr_remove(&ib_uverbs_qp_idr
, uobj
->id
);
199 ib_uverbs_detach_umcast(qp
, uqp
);
201 list_del(&uobj
->list
);
202 ib_uverbs_release_uevent(file
, &uqp
->uevent
);
206 list_for_each_entry_safe(uobj
, tmp
, &context
->cq_list
, list
) {
207 struct ib_cq
*cq
= idr_find(&ib_uverbs_cq_idr
, uobj
->id
);
208 struct ib_uverbs_event_file
*ev_file
= cq
->cq_context
;
209 struct ib_ucq_object
*ucq
=
210 container_of(uobj
, struct ib_ucq_object
, uobject
);
211 idr_remove(&ib_uverbs_cq_idr
, uobj
->id
);
213 list_del(&uobj
->list
);
214 ib_uverbs_release_ucq(file
, ev_file
, ucq
);
218 list_for_each_entry_safe(uobj
, tmp
, &context
->srq_list
, list
) {
219 struct ib_srq
*srq
= idr_find(&ib_uverbs_srq_idr
, uobj
->id
);
220 struct ib_uevent_object
*uevent
=
221 container_of(uobj
, struct ib_uevent_object
, uobject
);
222 idr_remove(&ib_uverbs_srq_idr
, uobj
->id
);
224 list_del(&uobj
->list
);
225 ib_uverbs_release_uevent(file
, uevent
);
231 list_for_each_entry_safe(uobj
, tmp
, &context
->mr_list
, list
) {
232 struct ib_mr
*mr
= idr_find(&ib_uverbs_mr_idr
, uobj
->id
);
233 struct ib_device
*mrdev
= mr
->device
;
234 struct ib_umem_object
*memobj
;
236 idr_remove(&ib_uverbs_mr_idr
, uobj
->id
);
239 memobj
= container_of(uobj
, struct ib_umem_object
, uobject
);
240 ib_umem_release_on_close(mrdev
, &memobj
->umem
);
242 list_del(&uobj
->list
);
246 list_for_each_entry_safe(uobj
, tmp
, &context
->pd_list
, list
) {
247 struct ib_pd
*pd
= idr_find(&ib_uverbs_pd_idr
, uobj
->id
);
248 idr_remove(&ib_uverbs_pd_idr
, uobj
->id
);
250 list_del(&uobj
->list
);
254 mutex_unlock(&ib_uverbs_idr_mutex
);
256 return context
->device
->dealloc_ucontext(context
);
259 static void ib_uverbs_release_file(struct kref
*ref
)
261 struct ib_uverbs_file
*file
=
262 container_of(ref
, struct ib_uverbs_file
, ref
);
264 module_put(file
->device
->ib_dev
->owner
);
265 kref_put(&file
->device
->ref
, ib_uverbs_release_dev
);
270 static ssize_t
ib_uverbs_event_read(struct file
*filp
, char __user
*buf
,
271 size_t count
, loff_t
*pos
)
273 struct ib_uverbs_event_file
*file
= filp
->private_data
;
274 struct ib_uverbs_event
*event
;
278 spin_lock_irq(&file
->lock
);
280 while (list_empty(&file
->event_list
)) {
281 spin_unlock_irq(&file
->lock
);
283 if (filp
->f_flags
& O_NONBLOCK
)
286 if (wait_event_interruptible(file
->poll_wait
,
287 !list_empty(&file
->event_list
)))
290 spin_lock_irq(&file
->lock
);
293 event
= list_entry(file
->event_list
.next
, struct ib_uverbs_event
, list
);
296 eventsz
= sizeof (struct ib_uverbs_async_event_desc
);
298 eventsz
= sizeof (struct ib_uverbs_comp_event_desc
);
300 if (eventsz
> count
) {
304 list_del(file
->event_list
.next
);
305 if (event
->counter
) {
307 list_del(&event
->obj_list
);
311 spin_unlock_irq(&file
->lock
);
314 if (copy_to_user(buf
, event
, eventsz
))
325 static unsigned int ib_uverbs_event_poll(struct file
*filp
,
326 struct poll_table_struct
*wait
)
328 unsigned int pollflags
= 0;
329 struct ib_uverbs_event_file
*file
= filp
->private_data
;
331 poll_wait(filp
, &file
->poll_wait
, wait
);
333 spin_lock_irq(&file
->lock
);
334 if (!list_empty(&file
->event_list
))
335 pollflags
= POLLIN
| POLLRDNORM
;
336 spin_unlock_irq(&file
->lock
);
341 void ib_uverbs_release_event_file(struct kref
*ref
)
343 struct ib_uverbs_event_file
*file
=
344 container_of(ref
, struct ib_uverbs_event_file
, ref
);
349 static int ib_uverbs_event_fasync(int fd
, struct file
*filp
, int on
)
351 struct ib_uverbs_event_file
*file
= filp
->private_data
;
353 return fasync_helper(fd
, filp
, on
, &file
->async_queue
);
356 static int ib_uverbs_event_close(struct inode
*inode
, struct file
*filp
)
358 struct ib_uverbs_event_file
*file
= filp
->private_data
;
359 struct ib_uverbs_event
*entry
, *tmp
;
361 spin_lock_irq(&file
->lock
);
363 list_for_each_entry_safe(entry
, tmp
, &file
->event_list
, list
) {
365 list_del(&entry
->obj_list
);
368 spin_unlock_irq(&file
->lock
);
370 ib_uverbs_event_fasync(-1, filp
, 0);
372 if (file
->is_async
) {
373 ib_unregister_event_handler(&file
->uverbs_file
->event_handler
);
374 kref_put(&file
->uverbs_file
->ref
, ib_uverbs_release_file
);
376 kref_put(&file
->ref
, ib_uverbs_release_event_file
);
381 static struct file_operations uverbs_event_fops
= {
382 .owner
= THIS_MODULE
,
383 .read
= ib_uverbs_event_read
,
384 .poll
= ib_uverbs_event_poll
,
385 .release
= ib_uverbs_event_close
,
386 .fasync
= ib_uverbs_event_fasync
389 void ib_uverbs_comp_handler(struct ib_cq
*cq
, void *cq_context
)
391 struct ib_uverbs_event_file
*file
= cq_context
;
392 struct ib_ucq_object
*uobj
;
393 struct ib_uverbs_event
*entry
;
399 spin_lock_irqsave(&file
->lock
, flags
);
401 spin_unlock_irqrestore(&file
->lock
, flags
);
405 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
407 spin_unlock_irqrestore(&file
->lock
, flags
);
411 uobj
= container_of(cq
->uobject
, struct ib_ucq_object
, uobject
);
413 entry
->desc
.comp
.cq_handle
= cq
->uobject
->user_handle
;
414 entry
->counter
= &uobj
->comp_events_reported
;
416 list_add_tail(&entry
->list
, &file
->event_list
);
417 list_add_tail(&entry
->obj_list
, &uobj
->comp_list
);
418 spin_unlock_irqrestore(&file
->lock
, flags
);
420 wake_up_interruptible(&file
->poll_wait
);
421 kill_fasync(&file
->async_queue
, SIGIO
, POLL_IN
);
424 static void ib_uverbs_async_handler(struct ib_uverbs_file
*file
,
425 __u64 element
, __u64 event
,
426 struct list_head
*obj_list
,
429 struct ib_uverbs_event
*entry
;
432 spin_lock_irqsave(&file
->async_file
->lock
, flags
);
433 if (!file
->async_file
->file
) {
434 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
438 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
440 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
444 entry
->desc
.async
.element
= element
;
445 entry
->desc
.async
.event_type
= event
;
446 entry
->counter
= counter
;
448 list_add_tail(&entry
->list
, &file
->async_file
->event_list
);
450 list_add_tail(&entry
->obj_list
, obj_list
);
451 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
453 wake_up_interruptible(&file
->async_file
->poll_wait
);
454 kill_fasync(&file
->async_file
->async_queue
, SIGIO
, POLL_IN
);
457 void ib_uverbs_cq_event_handler(struct ib_event
*event
, void *context_ptr
)
459 struct ib_ucq_object
*uobj
= container_of(event
->element
.cq
->uobject
,
460 struct ib_ucq_object
, uobject
);
462 ib_uverbs_async_handler(uobj
->uverbs_file
, uobj
->uobject
.user_handle
,
463 event
->event
, &uobj
->async_list
,
464 &uobj
->async_events_reported
);
468 void ib_uverbs_qp_event_handler(struct ib_event
*event
, void *context_ptr
)
470 struct ib_uevent_object
*uobj
;
472 uobj
= container_of(event
->element
.qp
->uobject
,
473 struct ib_uevent_object
, uobject
);
475 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
476 event
->event
, &uobj
->event_list
,
477 &uobj
->events_reported
);
480 void ib_uverbs_srq_event_handler(struct ib_event
*event
, void *context_ptr
)
482 struct ib_uevent_object
*uobj
;
484 uobj
= container_of(event
->element
.srq
->uobject
,
485 struct ib_uevent_object
, uobject
);
487 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
488 event
->event
, &uobj
->event_list
,
489 &uobj
->events_reported
);
492 void ib_uverbs_event_handler(struct ib_event_handler
*handler
,
493 struct ib_event
*event
)
495 struct ib_uverbs_file
*file
=
496 container_of(handler
, struct ib_uverbs_file
, event_handler
);
498 ib_uverbs_async_handler(file
, event
->element
.port_num
, event
->event
,
502 struct file
*ib_uverbs_alloc_event_file(struct ib_uverbs_file
*uverbs_file
,
503 int is_async
, int *fd
)
505 struct ib_uverbs_event_file
*ev_file
;
509 ev_file
= kmalloc(sizeof *ev_file
, GFP_KERNEL
);
511 return ERR_PTR(-ENOMEM
);
513 kref_init(&ev_file
->ref
);
514 spin_lock_init(&ev_file
->lock
);
515 INIT_LIST_HEAD(&ev_file
->event_list
);
516 init_waitqueue_head(&ev_file
->poll_wait
);
517 ev_file
->uverbs_file
= uverbs_file
;
518 ev_file
->async_queue
= NULL
;
519 ev_file
->is_async
= is_async
;
521 *fd
= get_unused_fd();
527 filp
= get_empty_filp();
533 ev_file
->file
= filp
;
536 * fops_get() can't fail here, because we're coming from a
537 * system call on a uverbs file, which will already have a
540 filp
->f_op
= fops_get(&uverbs_event_fops
);
541 filp
->f_vfsmnt
= mntget(uverbs_event_mnt
);
542 filp
->f_dentry
= dget(uverbs_event_mnt
->mnt_root
);
543 filp
->f_mapping
= filp
->f_dentry
->d_inode
->i_mapping
;
544 filp
->f_flags
= O_RDONLY
;
545 filp
->f_mode
= FMODE_READ
;
546 filp
->private_data
= ev_file
;
559 * Look up a completion event file by FD. If lookup is successful,
560 * takes a ref to the event file struct that it returns; if
561 * unsuccessful, returns NULL.
563 struct ib_uverbs_event_file
*ib_uverbs_lookup_comp_file(int fd
)
565 struct ib_uverbs_event_file
*ev_file
= NULL
;
572 if (filp
->f_op
!= &uverbs_event_fops
)
575 ev_file
= filp
->private_data
;
576 if (ev_file
->is_async
) {
581 kref_get(&ev_file
->ref
);
588 static ssize_t
ib_uverbs_write(struct file
*filp
, const char __user
*buf
,
589 size_t count
, loff_t
*pos
)
591 struct ib_uverbs_file
*file
= filp
->private_data
;
592 struct ib_uverbs_cmd_hdr hdr
;
594 if (count
< sizeof hdr
)
597 if (copy_from_user(&hdr
, buf
, sizeof hdr
))
600 if (hdr
.in_words
* 4 != count
)
603 if (hdr
.command
< 0 ||
604 hdr
.command
>= ARRAY_SIZE(uverbs_cmd_table
) ||
605 !uverbs_cmd_table
[hdr
.command
] ||
606 !(file
->device
->ib_dev
->uverbs_cmd_mask
& (1ull << hdr
.command
)))
609 if (!file
->ucontext
&&
610 hdr
.command
!= IB_USER_VERBS_CMD_GET_CONTEXT
)
613 return uverbs_cmd_table
[hdr
.command
](file
, buf
+ sizeof hdr
,
614 hdr
.in_words
* 4, hdr
.out_words
* 4);
617 static int ib_uverbs_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
619 struct ib_uverbs_file
*file
= filp
->private_data
;
624 return file
->device
->ib_dev
->mmap(file
->ucontext
, vma
);
627 static int ib_uverbs_open(struct inode
*inode
, struct file
*filp
)
629 struct ib_uverbs_device
*dev
;
630 struct ib_uverbs_file
*file
;
633 spin_lock(&map_lock
);
634 dev
= dev_table
[iminor(inode
) - IB_UVERBS_BASE_MINOR
];
637 spin_unlock(&map_lock
);
642 if (!try_module_get(dev
->ib_dev
->owner
)) {
647 file
= kmalloc(sizeof *file
, GFP_KERNEL
);
654 file
->ucontext
= NULL
;
655 file
->async_file
= NULL
;
656 kref_init(&file
->ref
);
657 mutex_init(&file
->mutex
);
659 filp
->private_data
= file
;
664 module_put(dev
->ib_dev
->owner
);
667 kref_put(&dev
->ref
, ib_uverbs_release_dev
);
672 static int ib_uverbs_close(struct inode
*inode
, struct file
*filp
)
674 struct ib_uverbs_file
*file
= filp
->private_data
;
676 ib_uverbs_cleanup_ucontext(file
, file
->ucontext
);
678 if (file
->async_file
)
679 kref_put(&file
->async_file
->ref
, ib_uverbs_release_event_file
);
681 kref_put(&file
->ref
, ib_uverbs_release_file
);
686 static struct file_operations uverbs_fops
= {
687 .owner
= THIS_MODULE
,
688 .write
= ib_uverbs_write
,
689 .open
= ib_uverbs_open
,
690 .release
= ib_uverbs_close
693 static struct file_operations uverbs_mmap_fops
= {
694 .owner
= THIS_MODULE
,
695 .write
= ib_uverbs_write
,
696 .mmap
= ib_uverbs_mmap
,
697 .open
= ib_uverbs_open
,
698 .release
= ib_uverbs_close
701 static struct ib_client uverbs_client
= {
703 .add
= ib_uverbs_add_one
,
704 .remove
= ib_uverbs_remove_one
707 static ssize_t
show_ibdev(struct class_device
*class_dev
, char *buf
)
709 struct ib_uverbs_device
*dev
= class_get_devdata(class_dev
);
714 return sprintf(buf
, "%s\n", dev
->ib_dev
->name
);
716 static CLASS_DEVICE_ATTR(ibdev
, S_IRUGO
, show_ibdev
, NULL
);
718 static ssize_t
show_dev_abi_version(struct class_device
*class_dev
, char *buf
)
720 struct ib_uverbs_device
*dev
= class_get_devdata(class_dev
);
725 return sprintf(buf
, "%d\n", dev
->ib_dev
->uverbs_abi_ver
);
727 static CLASS_DEVICE_ATTR(abi_version
, S_IRUGO
, show_dev_abi_version
, NULL
);
729 static ssize_t
show_abi_version(struct class *class, char *buf
)
731 return sprintf(buf
, "%d\n", IB_USER_VERBS_ABI_VERSION
);
733 static CLASS_ATTR(abi_version
, S_IRUGO
, show_abi_version
, NULL
);
735 static void ib_uverbs_add_one(struct ib_device
*device
)
737 struct ib_uverbs_device
*uverbs_dev
;
739 if (!device
->alloc_ucontext
)
742 uverbs_dev
= kzalloc(sizeof *uverbs_dev
, GFP_KERNEL
);
746 kref_init(&uverbs_dev
->ref
);
748 spin_lock(&map_lock
);
749 uverbs_dev
->devnum
= find_first_zero_bit(dev_map
, IB_UVERBS_MAX_DEVICES
);
750 if (uverbs_dev
->devnum
>= IB_UVERBS_MAX_DEVICES
) {
751 spin_unlock(&map_lock
);
754 set_bit(uverbs_dev
->devnum
, dev_map
);
755 spin_unlock(&map_lock
);
757 uverbs_dev
->ib_dev
= device
;
758 uverbs_dev
->num_comp_vectors
= 1;
760 uverbs_dev
->dev
= cdev_alloc();
761 if (!uverbs_dev
->dev
)
763 uverbs_dev
->dev
->owner
= THIS_MODULE
;
764 uverbs_dev
->dev
->ops
= device
->mmap
? &uverbs_mmap_fops
: &uverbs_fops
;
765 kobject_set_name(&uverbs_dev
->dev
->kobj
, "uverbs%d", uverbs_dev
->devnum
);
766 if (cdev_add(uverbs_dev
->dev
, IB_UVERBS_BASE_DEV
+ uverbs_dev
->devnum
, 1))
769 uverbs_dev
->class_dev
= class_device_create(uverbs_class
, NULL
,
770 uverbs_dev
->dev
->dev
,
772 "uverbs%d", uverbs_dev
->devnum
);
773 if (IS_ERR(uverbs_dev
->class_dev
))
776 class_set_devdata(uverbs_dev
->class_dev
, uverbs_dev
);
778 if (class_device_create_file(uverbs_dev
->class_dev
, &class_device_attr_ibdev
))
780 if (class_device_create_file(uverbs_dev
->class_dev
, &class_device_attr_abi_version
))
783 spin_lock(&map_lock
);
784 dev_table
[uverbs_dev
->devnum
] = uverbs_dev
;
785 spin_unlock(&map_lock
);
787 ib_set_client_data(device
, &uverbs_client
, uverbs_dev
);
792 class_device_destroy(uverbs_class
, uverbs_dev
->dev
->dev
);
795 cdev_del(uverbs_dev
->dev
);
796 clear_bit(uverbs_dev
->devnum
, dev_map
);
799 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
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 class_set_devdata(uverbs_dev
->class_dev
, NULL
);
811 class_device_destroy(uverbs_class
, uverbs_dev
->dev
->dev
);
812 cdev_del(uverbs_dev
->dev
);
814 spin_lock(&map_lock
);
815 dev_table
[uverbs_dev
->devnum
] = NULL
;
816 spin_unlock(&map_lock
);
818 clear_bit(uverbs_dev
->devnum
, dev_map
);
819 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
822 static struct super_block
*uverbs_event_get_sb(struct file_system_type
*fs_type
, int flags
,
823 const char *dev_name
, void *data
)
825 return get_sb_pseudo(fs_type
, "infinibandevent:", NULL
,
826 INFINIBANDEVENTFS_MAGIC
);
829 static struct file_system_type uverbs_event_fs
= {
830 /* No owner field so module can be unloaded */
831 .name
= "infinibandeventfs",
832 .get_sb
= uverbs_event_get_sb
,
833 .kill_sb
= kill_litter_super
836 static int __init
ib_uverbs_init(void)
840 spin_lock_init(&map_lock
);
842 ret
= register_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
,
845 printk(KERN_ERR
"user_verbs: couldn't register device number\n");
849 uverbs_class
= class_create(THIS_MODULE
, "infiniband_verbs");
850 if (IS_ERR(uverbs_class
)) {
851 ret
= PTR_ERR(uverbs_class
);
852 printk(KERN_ERR
"user_verbs: couldn't create class infiniband_verbs\n");
856 ret
= class_create_file(uverbs_class
, &class_attr_abi_version
);
858 printk(KERN_ERR
"user_verbs: couldn't create abi_version attribute\n");
862 ret
= register_filesystem(&uverbs_event_fs
);
864 printk(KERN_ERR
"user_verbs: couldn't register infinibandeventfs\n");
868 uverbs_event_mnt
= kern_mount(&uverbs_event_fs
);
869 if (IS_ERR(uverbs_event_mnt
)) {
870 ret
= PTR_ERR(uverbs_event_mnt
);
871 printk(KERN_ERR
"user_verbs: couldn't mount infinibandeventfs\n");
875 ret
= ib_register_client(&uverbs_client
);
877 printk(KERN_ERR
"user_verbs: couldn't register client\n");
884 mntput(uverbs_event_mnt
);
887 unregister_filesystem(&uverbs_event_fs
);
890 class_destroy(uverbs_class
);
893 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
899 static void __exit
ib_uverbs_cleanup(void)
901 ib_unregister_client(&uverbs_client
);
902 mntput(uverbs_event_mnt
);
903 unregister_filesystem(&uverbs_event_fs
);
904 class_destroy(uverbs_class
);
905 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
906 flush_scheduled_work();
907 idr_destroy(&ib_uverbs_pd_idr
);
908 idr_destroy(&ib_uverbs_mr_idr
);
909 idr_destroy(&ib_uverbs_mw_idr
);
910 idr_destroy(&ib_uverbs_ah_idr
);
911 idr_destroy(&ib_uverbs_cq_idr
);
912 idr_destroy(&ib_uverbs_qp_idr
);
913 idr_destroy(&ib_uverbs_srq_idr
);
916 module_init(ib_uverbs_init
);
917 module_exit(ib_uverbs_cleanup
);