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
);
75 DEFINE_IDR(ib_uverbs_xrcd_idr
);
76 DEFINE_IDR(ib_uverbs_rule_idr
);
78 static DEFINE_SPINLOCK(map_lock
);
79 static DECLARE_BITMAP(dev_map
, IB_UVERBS_MAX_DEVICES
);
81 static ssize_t (*uverbs_cmd_table
[])(struct ib_uverbs_file
*file
,
82 const char __user
*buf
, int in_len
,
84 [IB_USER_VERBS_CMD_GET_CONTEXT
] = ib_uverbs_get_context
,
85 [IB_USER_VERBS_CMD_QUERY_DEVICE
] = ib_uverbs_query_device
,
86 [IB_USER_VERBS_CMD_QUERY_PORT
] = ib_uverbs_query_port
,
87 [IB_USER_VERBS_CMD_ALLOC_PD
] = ib_uverbs_alloc_pd
,
88 [IB_USER_VERBS_CMD_DEALLOC_PD
] = ib_uverbs_dealloc_pd
,
89 [IB_USER_VERBS_CMD_REG_MR
] = ib_uverbs_reg_mr
,
90 [IB_USER_VERBS_CMD_DEREG_MR
] = ib_uverbs_dereg_mr
,
91 [IB_USER_VERBS_CMD_ALLOC_MW
] = ib_uverbs_alloc_mw
,
92 [IB_USER_VERBS_CMD_DEALLOC_MW
] = ib_uverbs_dealloc_mw
,
93 [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL
] = ib_uverbs_create_comp_channel
,
94 [IB_USER_VERBS_CMD_CREATE_CQ
] = ib_uverbs_create_cq
,
95 [IB_USER_VERBS_CMD_RESIZE_CQ
] = ib_uverbs_resize_cq
,
96 [IB_USER_VERBS_CMD_POLL_CQ
] = ib_uverbs_poll_cq
,
97 [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ
] = ib_uverbs_req_notify_cq
,
98 [IB_USER_VERBS_CMD_DESTROY_CQ
] = ib_uverbs_destroy_cq
,
99 [IB_USER_VERBS_CMD_CREATE_QP
] = ib_uverbs_create_qp
,
100 [IB_USER_VERBS_CMD_QUERY_QP
] = ib_uverbs_query_qp
,
101 [IB_USER_VERBS_CMD_MODIFY_QP
] = ib_uverbs_modify_qp
,
102 [IB_USER_VERBS_CMD_DESTROY_QP
] = ib_uverbs_destroy_qp
,
103 [IB_USER_VERBS_CMD_POST_SEND
] = ib_uverbs_post_send
,
104 [IB_USER_VERBS_CMD_POST_RECV
] = ib_uverbs_post_recv
,
105 [IB_USER_VERBS_CMD_POST_SRQ_RECV
] = ib_uverbs_post_srq_recv
,
106 [IB_USER_VERBS_CMD_CREATE_AH
] = ib_uverbs_create_ah
,
107 [IB_USER_VERBS_CMD_DESTROY_AH
] = ib_uverbs_destroy_ah
,
108 [IB_USER_VERBS_CMD_ATTACH_MCAST
] = ib_uverbs_attach_mcast
,
109 [IB_USER_VERBS_CMD_DETACH_MCAST
] = ib_uverbs_detach_mcast
,
110 [IB_USER_VERBS_CMD_CREATE_SRQ
] = ib_uverbs_create_srq
,
111 [IB_USER_VERBS_CMD_MODIFY_SRQ
] = ib_uverbs_modify_srq
,
112 [IB_USER_VERBS_CMD_QUERY_SRQ
] = ib_uverbs_query_srq
,
113 [IB_USER_VERBS_CMD_DESTROY_SRQ
] = ib_uverbs_destroy_srq
,
114 [IB_USER_VERBS_CMD_OPEN_XRCD
] = ib_uverbs_open_xrcd
,
115 [IB_USER_VERBS_CMD_CLOSE_XRCD
] = ib_uverbs_close_xrcd
,
116 [IB_USER_VERBS_CMD_CREATE_XSRQ
] = ib_uverbs_create_xsrq
,
117 [IB_USER_VERBS_CMD_OPEN_QP
] = ib_uverbs_open_qp
,
118 [IB_USER_VERBS_CMD_CREATE_FLOW
] = ib_uverbs_create_flow
,
119 [IB_USER_VERBS_CMD_DESTROY_FLOW
] = ib_uverbs_destroy_flow
122 static void ib_uverbs_add_one(struct ib_device
*device
);
123 static void ib_uverbs_remove_one(struct ib_device
*device
);
125 static void ib_uverbs_release_dev(struct kref
*ref
)
127 struct ib_uverbs_device
*dev
=
128 container_of(ref
, struct ib_uverbs_device
, ref
);
130 complete(&dev
->comp
);
133 static void ib_uverbs_release_event_file(struct kref
*ref
)
135 struct ib_uverbs_event_file
*file
=
136 container_of(ref
, struct ib_uverbs_event_file
, ref
);
141 void ib_uverbs_release_ucq(struct ib_uverbs_file
*file
,
142 struct ib_uverbs_event_file
*ev_file
,
143 struct ib_ucq_object
*uobj
)
145 struct ib_uverbs_event
*evt
, *tmp
;
148 spin_lock_irq(&ev_file
->lock
);
149 list_for_each_entry_safe(evt
, tmp
, &uobj
->comp_list
, obj_list
) {
150 list_del(&evt
->list
);
153 spin_unlock_irq(&ev_file
->lock
);
155 kref_put(&ev_file
->ref
, ib_uverbs_release_event_file
);
158 spin_lock_irq(&file
->async_file
->lock
);
159 list_for_each_entry_safe(evt
, tmp
, &uobj
->async_list
, obj_list
) {
160 list_del(&evt
->list
);
163 spin_unlock_irq(&file
->async_file
->lock
);
166 void ib_uverbs_release_uevent(struct ib_uverbs_file
*file
,
167 struct ib_uevent_object
*uobj
)
169 struct ib_uverbs_event
*evt
, *tmp
;
171 spin_lock_irq(&file
->async_file
->lock
);
172 list_for_each_entry_safe(evt
, tmp
, &uobj
->event_list
, obj_list
) {
173 list_del(&evt
->list
);
176 spin_unlock_irq(&file
->async_file
->lock
);
179 static void ib_uverbs_detach_umcast(struct ib_qp
*qp
,
180 struct ib_uqp_object
*uobj
)
182 struct ib_uverbs_mcast_entry
*mcast
, *tmp
;
184 list_for_each_entry_safe(mcast
, tmp
, &uobj
->mcast_list
, list
) {
185 ib_detach_mcast(qp
, &mcast
->gid
, mcast
->lid
);
186 list_del(&mcast
->list
);
191 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file
*file
,
192 struct ib_ucontext
*context
)
194 struct ib_uobject
*uobj
, *tmp
;
199 context
->closing
= 1;
201 list_for_each_entry_safe(uobj
, tmp
, &context
->ah_list
, list
) {
202 struct ib_ah
*ah
= uobj
->object
;
204 idr_remove_uobj(&ib_uverbs_ah_idr
, uobj
);
209 /* Remove MWs before QPs, in order to support type 2A MWs. */
210 list_for_each_entry_safe(uobj
, tmp
, &context
->mw_list
, list
) {
211 struct ib_mw
*mw
= uobj
->object
;
213 idr_remove_uobj(&ib_uverbs_mw_idr
, uobj
);
218 list_for_each_entry_safe(uobj
, tmp
, &context
->rule_list
, list
) {
219 struct ib_flow
*flow_id
= uobj
->object
;
221 idr_remove_uobj(&ib_uverbs_rule_idr
, uobj
);
222 ib_destroy_flow(flow_id
);
226 list_for_each_entry_safe(uobj
, tmp
, &context
->qp_list
, list
) {
227 struct ib_qp
*qp
= uobj
->object
;
228 struct ib_uqp_object
*uqp
=
229 container_of(uobj
, struct ib_uqp_object
, uevent
.uobject
);
231 idr_remove_uobj(&ib_uverbs_qp_idr
, uobj
);
232 if (qp
!= qp
->real_qp
) {
235 ib_uverbs_detach_umcast(qp
, uqp
);
238 ib_uverbs_release_uevent(file
, &uqp
->uevent
);
242 list_for_each_entry_safe(uobj
, tmp
, &context
->cq_list
, list
) {
243 struct ib_cq
*cq
= uobj
->object
;
244 struct ib_uverbs_event_file
*ev_file
= cq
->cq_context
;
245 struct ib_ucq_object
*ucq
=
246 container_of(uobj
, struct ib_ucq_object
, uobject
);
248 idr_remove_uobj(&ib_uverbs_cq_idr
, uobj
);
250 ib_uverbs_release_ucq(file
, ev_file
, ucq
);
254 list_for_each_entry_safe(uobj
, tmp
, &context
->srq_list
, list
) {
255 struct ib_srq
*srq
= uobj
->object
;
256 struct ib_uevent_object
*uevent
=
257 container_of(uobj
, struct ib_uevent_object
, uobject
);
259 idr_remove_uobj(&ib_uverbs_srq_idr
, uobj
);
261 ib_uverbs_release_uevent(file
, uevent
);
265 list_for_each_entry_safe(uobj
, tmp
, &context
->mr_list
, list
) {
266 struct ib_mr
*mr
= uobj
->object
;
268 idr_remove_uobj(&ib_uverbs_mr_idr
, uobj
);
273 mutex_lock(&file
->device
->xrcd_tree_mutex
);
274 list_for_each_entry_safe(uobj
, tmp
, &context
->xrcd_list
, list
) {
275 struct ib_xrcd
*xrcd
= uobj
->object
;
276 struct ib_uxrcd_object
*uxrcd
=
277 container_of(uobj
, struct ib_uxrcd_object
, uobject
);
279 idr_remove_uobj(&ib_uverbs_xrcd_idr
, uobj
);
280 ib_uverbs_dealloc_xrcd(file
->device
, xrcd
);
283 mutex_unlock(&file
->device
->xrcd_tree_mutex
);
285 list_for_each_entry_safe(uobj
, tmp
, &context
->pd_list
, list
) {
286 struct ib_pd
*pd
= uobj
->object
;
288 idr_remove_uobj(&ib_uverbs_pd_idr
, uobj
);
293 return context
->device
->dealloc_ucontext(context
);
296 static void ib_uverbs_release_file(struct kref
*ref
)
298 struct ib_uverbs_file
*file
=
299 container_of(ref
, struct ib_uverbs_file
, ref
);
301 module_put(file
->device
->ib_dev
->owner
);
302 kref_put(&file
->device
->ref
, ib_uverbs_release_dev
);
307 static ssize_t
ib_uverbs_event_read(struct file
*filp
, char __user
*buf
,
308 size_t count
, loff_t
*pos
)
310 struct ib_uverbs_event_file
*file
= filp
->private_data
;
311 struct ib_uverbs_event
*event
;
315 spin_lock_irq(&file
->lock
);
317 while (list_empty(&file
->event_list
)) {
318 spin_unlock_irq(&file
->lock
);
320 if (filp
->f_flags
& O_NONBLOCK
)
323 if (wait_event_interruptible(file
->poll_wait
,
324 !list_empty(&file
->event_list
)))
327 spin_lock_irq(&file
->lock
);
330 event
= list_entry(file
->event_list
.next
, struct ib_uverbs_event
, list
);
333 eventsz
= sizeof (struct ib_uverbs_async_event_desc
);
335 eventsz
= sizeof (struct ib_uverbs_comp_event_desc
);
337 if (eventsz
> count
) {
341 list_del(file
->event_list
.next
);
342 if (event
->counter
) {
344 list_del(&event
->obj_list
);
348 spin_unlock_irq(&file
->lock
);
351 if (copy_to_user(buf
, event
, eventsz
))
362 static unsigned int ib_uverbs_event_poll(struct file
*filp
,
363 struct poll_table_struct
*wait
)
365 unsigned int pollflags
= 0;
366 struct ib_uverbs_event_file
*file
= filp
->private_data
;
368 poll_wait(filp
, &file
->poll_wait
, wait
);
370 spin_lock_irq(&file
->lock
);
371 if (!list_empty(&file
->event_list
))
372 pollflags
= POLLIN
| POLLRDNORM
;
373 spin_unlock_irq(&file
->lock
);
378 static int ib_uverbs_event_fasync(int fd
, struct file
*filp
, int on
)
380 struct ib_uverbs_event_file
*file
= filp
->private_data
;
382 return fasync_helper(fd
, filp
, on
, &file
->async_queue
);
385 static int ib_uverbs_event_close(struct inode
*inode
, struct file
*filp
)
387 struct ib_uverbs_event_file
*file
= filp
->private_data
;
388 struct ib_uverbs_event
*entry
, *tmp
;
390 spin_lock_irq(&file
->lock
);
392 list_for_each_entry_safe(entry
, tmp
, &file
->event_list
, list
) {
394 list_del(&entry
->obj_list
);
397 spin_unlock_irq(&file
->lock
);
399 if (file
->is_async
) {
400 ib_unregister_event_handler(&file
->uverbs_file
->event_handler
);
401 kref_put(&file
->uverbs_file
->ref
, ib_uverbs_release_file
);
403 kref_put(&file
->ref
, ib_uverbs_release_event_file
);
408 static const struct file_operations uverbs_event_fops
= {
409 .owner
= THIS_MODULE
,
410 .read
= ib_uverbs_event_read
,
411 .poll
= ib_uverbs_event_poll
,
412 .release
= ib_uverbs_event_close
,
413 .fasync
= ib_uverbs_event_fasync
,
417 void ib_uverbs_comp_handler(struct ib_cq
*cq
, void *cq_context
)
419 struct ib_uverbs_event_file
*file
= cq_context
;
420 struct ib_ucq_object
*uobj
;
421 struct ib_uverbs_event
*entry
;
427 spin_lock_irqsave(&file
->lock
, flags
);
428 if (file
->is_closed
) {
429 spin_unlock_irqrestore(&file
->lock
, flags
);
433 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
435 spin_unlock_irqrestore(&file
->lock
, flags
);
439 uobj
= container_of(cq
->uobject
, struct ib_ucq_object
, uobject
);
441 entry
->desc
.comp
.cq_handle
= cq
->uobject
->user_handle
;
442 entry
->counter
= &uobj
->comp_events_reported
;
444 list_add_tail(&entry
->list
, &file
->event_list
);
445 list_add_tail(&entry
->obj_list
, &uobj
->comp_list
);
446 spin_unlock_irqrestore(&file
->lock
, flags
);
448 wake_up_interruptible(&file
->poll_wait
);
449 kill_fasync(&file
->async_queue
, SIGIO
, POLL_IN
);
452 static void ib_uverbs_async_handler(struct ib_uverbs_file
*file
,
453 __u64 element
, __u64 event
,
454 struct list_head
*obj_list
,
457 struct ib_uverbs_event
*entry
;
460 spin_lock_irqsave(&file
->async_file
->lock
, flags
);
461 if (file
->async_file
->is_closed
) {
462 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
466 entry
= kmalloc(sizeof *entry
, GFP_ATOMIC
);
468 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
472 entry
->desc
.async
.element
= element
;
473 entry
->desc
.async
.event_type
= event
;
474 entry
->counter
= counter
;
476 list_add_tail(&entry
->list
, &file
->async_file
->event_list
);
478 list_add_tail(&entry
->obj_list
, obj_list
);
479 spin_unlock_irqrestore(&file
->async_file
->lock
, flags
);
481 wake_up_interruptible(&file
->async_file
->poll_wait
);
482 kill_fasync(&file
->async_file
->async_queue
, SIGIO
, POLL_IN
);
485 void ib_uverbs_cq_event_handler(struct ib_event
*event
, void *context_ptr
)
487 struct ib_ucq_object
*uobj
= container_of(event
->element
.cq
->uobject
,
488 struct ib_ucq_object
, uobject
);
490 ib_uverbs_async_handler(uobj
->uverbs_file
, uobj
->uobject
.user_handle
,
491 event
->event
, &uobj
->async_list
,
492 &uobj
->async_events_reported
);
495 void ib_uverbs_qp_event_handler(struct ib_event
*event
, void *context_ptr
)
497 struct ib_uevent_object
*uobj
;
499 uobj
= container_of(event
->element
.qp
->uobject
,
500 struct ib_uevent_object
, uobject
);
502 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
503 event
->event
, &uobj
->event_list
,
504 &uobj
->events_reported
);
507 void ib_uverbs_srq_event_handler(struct ib_event
*event
, void *context_ptr
)
509 struct ib_uevent_object
*uobj
;
511 uobj
= container_of(event
->element
.srq
->uobject
,
512 struct ib_uevent_object
, uobject
);
514 ib_uverbs_async_handler(context_ptr
, uobj
->uobject
.user_handle
,
515 event
->event
, &uobj
->event_list
,
516 &uobj
->events_reported
);
519 void ib_uverbs_event_handler(struct ib_event_handler
*handler
,
520 struct ib_event
*event
)
522 struct ib_uverbs_file
*file
=
523 container_of(handler
, struct ib_uverbs_file
, event_handler
);
525 ib_uverbs_async_handler(file
, event
->element
.port_num
, event
->event
,
529 struct file
*ib_uverbs_alloc_event_file(struct ib_uverbs_file
*uverbs_file
,
532 struct ib_uverbs_event_file
*ev_file
;
535 ev_file
= kmalloc(sizeof *ev_file
, GFP_KERNEL
);
537 return ERR_PTR(-ENOMEM
);
539 kref_init(&ev_file
->ref
);
540 spin_lock_init(&ev_file
->lock
);
541 INIT_LIST_HEAD(&ev_file
->event_list
);
542 init_waitqueue_head(&ev_file
->poll_wait
);
543 ev_file
->uverbs_file
= uverbs_file
;
544 ev_file
->async_queue
= NULL
;
545 ev_file
->is_async
= is_async
;
546 ev_file
->is_closed
= 0;
548 filp
= anon_inode_getfile("[infinibandevent]", &uverbs_event_fops
,
557 * Look up a completion event file by FD. If lookup is successful,
558 * takes a ref to the event file struct that it returns; if
559 * unsuccessful, returns NULL.
561 struct ib_uverbs_event_file
*ib_uverbs_lookup_comp_file(int fd
)
563 struct ib_uverbs_event_file
*ev_file
= NULL
;
564 struct fd f
= fdget(fd
);
569 if (f
.file
->f_op
!= &uverbs_event_fops
)
572 ev_file
= f
.file
->private_data
;
573 if (ev_file
->is_async
) {
578 kref_get(&ev_file
->ref
);
585 static ssize_t
ib_uverbs_write(struct file
*filp
, const char __user
*buf
,
586 size_t count
, loff_t
*pos
)
588 struct ib_uverbs_file
*file
= filp
->private_data
;
589 struct ib_uverbs_cmd_hdr hdr
;
591 if (count
< sizeof hdr
)
594 if (copy_from_user(&hdr
, buf
, sizeof hdr
))
597 if (hdr
.command
>= ARRAY_SIZE(uverbs_cmd_table
) ||
598 !uverbs_cmd_table
[hdr
.command
])
601 if (!file
->ucontext
&&
602 hdr
.command
!= IB_USER_VERBS_CMD_GET_CONTEXT
)
605 if (!(file
->device
->ib_dev
->uverbs_cmd_mask
& (1ull << hdr
.command
)))
608 if (hdr
.command
>= IB_USER_VERBS_CMD_THRESHOLD
) {
609 struct ib_uverbs_cmd_hdr_ex hdr_ex
;
611 if (copy_from_user(&hdr_ex
, buf
, sizeof(hdr_ex
)))
614 if (((hdr_ex
.in_words
+ hdr_ex
.provider_in_words
) * 4) != count
)
617 return uverbs_cmd_table
[hdr
.command
](file
,
618 buf
+ sizeof(hdr_ex
),
620 hdr_ex
.provider_in_words
) * 4,
622 hdr_ex
.provider_out_words
) * 4);
624 if (hdr
.in_words
* 4 != count
)
627 return uverbs_cmd_table
[hdr
.command
](file
,
634 static int ib_uverbs_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
636 struct ib_uverbs_file
*file
= filp
->private_data
;
641 return file
->device
->ib_dev
->mmap(file
->ucontext
, vma
);
645 * ib_uverbs_open() does not need the BKL:
647 * - the ib_uverbs_device structures are properly reference counted and
648 * everything else is purely local to the file being created, so
649 * races against other open calls are not a problem;
650 * - there is no ioctl method to race against;
651 * - the open method will either immediately run -ENXIO, or all
652 * required initialization will be done.
654 static int ib_uverbs_open(struct inode
*inode
, struct file
*filp
)
656 struct ib_uverbs_device
*dev
;
657 struct ib_uverbs_file
*file
;
660 dev
= container_of(inode
->i_cdev
, struct ib_uverbs_device
, cdev
);
666 if (!try_module_get(dev
->ib_dev
->owner
)) {
671 file
= kmalloc(sizeof *file
, GFP_KERNEL
);
678 file
->ucontext
= NULL
;
679 file
->async_file
= NULL
;
680 kref_init(&file
->ref
);
681 mutex_init(&file
->mutex
);
683 filp
->private_data
= file
;
685 return nonseekable_open(inode
, filp
);
688 module_put(dev
->ib_dev
->owner
);
691 kref_put(&dev
->ref
, ib_uverbs_release_dev
);
695 static int ib_uverbs_close(struct inode
*inode
, struct file
*filp
)
697 struct ib_uverbs_file
*file
= filp
->private_data
;
699 ib_uverbs_cleanup_ucontext(file
, file
->ucontext
);
701 if (file
->async_file
)
702 kref_put(&file
->async_file
->ref
, ib_uverbs_release_event_file
);
704 kref_put(&file
->ref
, ib_uverbs_release_file
);
709 static const struct file_operations uverbs_fops
= {
710 .owner
= THIS_MODULE
,
711 .write
= ib_uverbs_write
,
712 .open
= ib_uverbs_open
,
713 .release
= ib_uverbs_close
,
717 static const struct file_operations uverbs_mmap_fops
= {
718 .owner
= THIS_MODULE
,
719 .write
= ib_uverbs_write
,
720 .mmap
= ib_uverbs_mmap
,
721 .open
= ib_uverbs_open
,
722 .release
= ib_uverbs_close
,
726 static struct ib_client uverbs_client
= {
728 .add
= ib_uverbs_add_one
,
729 .remove
= ib_uverbs_remove_one
732 static ssize_t
show_ibdev(struct device
*device
, struct device_attribute
*attr
,
735 struct ib_uverbs_device
*dev
= dev_get_drvdata(device
);
740 return sprintf(buf
, "%s\n", dev
->ib_dev
->name
);
742 static DEVICE_ATTR(ibdev
, S_IRUGO
, show_ibdev
, NULL
);
744 static ssize_t
show_dev_abi_version(struct device
*device
,
745 struct device_attribute
*attr
, char *buf
)
747 struct ib_uverbs_device
*dev
= dev_get_drvdata(device
);
752 return sprintf(buf
, "%d\n", dev
->ib_dev
->uverbs_abi_ver
);
754 static DEVICE_ATTR(abi_version
, S_IRUGO
, show_dev_abi_version
, NULL
);
756 static CLASS_ATTR_STRING(abi_version
, S_IRUGO
,
757 __stringify(IB_USER_VERBS_ABI_VERSION
));
759 static dev_t overflow_maj
;
760 static DECLARE_BITMAP(overflow_map
, IB_UVERBS_MAX_DEVICES
);
763 * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by
764 * requesting a new major number and doubling the number of max devices we
765 * support. It's stupid, but simple.
767 static int find_overflow_devnum(void)
772 ret
= alloc_chrdev_region(&overflow_maj
, 0, IB_UVERBS_MAX_DEVICES
,
775 printk(KERN_ERR
"user_verbs: couldn't register dynamic device number\n");
780 ret
= find_first_zero_bit(overflow_map
, IB_UVERBS_MAX_DEVICES
);
781 if (ret
>= IB_UVERBS_MAX_DEVICES
)
787 static void ib_uverbs_add_one(struct ib_device
*device
)
791 struct ib_uverbs_device
*uverbs_dev
;
793 if (!device
->alloc_ucontext
)
796 uverbs_dev
= kzalloc(sizeof *uverbs_dev
, GFP_KERNEL
);
800 kref_init(&uverbs_dev
->ref
);
801 init_completion(&uverbs_dev
->comp
);
802 uverbs_dev
->xrcd_tree
= RB_ROOT
;
803 mutex_init(&uverbs_dev
->xrcd_tree_mutex
);
805 spin_lock(&map_lock
);
806 devnum
= find_first_zero_bit(dev_map
, IB_UVERBS_MAX_DEVICES
);
807 if (devnum
>= IB_UVERBS_MAX_DEVICES
) {
808 spin_unlock(&map_lock
);
809 devnum
= find_overflow_devnum();
813 spin_lock(&map_lock
);
814 uverbs_dev
->devnum
= devnum
+ IB_UVERBS_MAX_DEVICES
;
815 base
= devnum
+ overflow_maj
;
816 set_bit(devnum
, overflow_map
);
818 uverbs_dev
->devnum
= devnum
;
819 base
= devnum
+ IB_UVERBS_BASE_DEV
;
820 set_bit(devnum
, dev_map
);
822 spin_unlock(&map_lock
);
824 uverbs_dev
->ib_dev
= device
;
825 uverbs_dev
->num_comp_vectors
= device
->num_comp_vectors
;
827 cdev_init(&uverbs_dev
->cdev
, NULL
);
828 uverbs_dev
->cdev
.owner
= THIS_MODULE
;
829 uverbs_dev
->cdev
.ops
= device
->mmap
? &uverbs_mmap_fops
: &uverbs_fops
;
830 kobject_set_name(&uverbs_dev
->cdev
.kobj
, "uverbs%d", uverbs_dev
->devnum
);
831 if (cdev_add(&uverbs_dev
->cdev
, base
, 1))
834 uverbs_dev
->dev
= device_create(uverbs_class
, device
->dma_device
,
835 uverbs_dev
->cdev
.dev
, uverbs_dev
,
836 "uverbs%d", uverbs_dev
->devnum
);
837 if (IS_ERR(uverbs_dev
->dev
))
840 if (device_create_file(uverbs_dev
->dev
, &dev_attr_ibdev
))
842 if (device_create_file(uverbs_dev
->dev
, &dev_attr_abi_version
))
845 ib_set_client_data(device
, &uverbs_client
, uverbs_dev
);
850 device_destroy(uverbs_class
, uverbs_dev
->cdev
.dev
);
853 cdev_del(&uverbs_dev
->cdev
);
854 if (uverbs_dev
->devnum
< IB_UVERBS_MAX_DEVICES
)
855 clear_bit(devnum
, dev_map
);
857 clear_bit(devnum
, overflow_map
);
860 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
861 wait_for_completion(&uverbs_dev
->comp
);
866 static void ib_uverbs_remove_one(struct ib_device
*device
)
868 struct ib_uverbs_device
*uverbs_dev
= ib_get_client_data(device
, &uverbs_client
);
873 dev_set_drvdata(uverbs_dev
->dev
, NULL
);
874 device_destroy(uverbs_class
, uverbs_dev
->cdev
.dev
);
875 cdev_del(&uverbs_dev
->cdev
);
877 if (uverbs_dev
->devnum
< IB_UVERBS_MAX_DEVICES
)
878 clear_bit(uverbs_dev
->devnum
, dev_map
);
880 clear_bit(uverbs_dev
->devnum
- IB_UVERBS_MAX_DEVICES
, overflow_map
);
882 kref_put(&uverbs_dev
->ref
, ib_uverbs_release_dev
);
883 wait_for_completion(&uverbs_dev
->comp
);
887 static char *uverbs_devnode(struct device
*dev
, umode_t
*mode
)
891 return kasprintf(GFP_KERNEL
, "infiniband/%s", dev_name(dev
));
894 static int __init
ib_uverbs_init(void)
898 ret
= register_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
,
901 printk(KERN_ERR
"user_verbs: couldn't register device number\n");
905 uverbs_class
= class_create(THIS_MODULE
, "infiniband_verbs");
906 if (IS_ERR(uverbs_class
)) {
907 ret
= PTR_ERR(uverbs_class
);
908 printk(KERN_ERR
"user_verbs: couldn't create class infiniband_verbs\n");
912 uverbs_class
->devnode
= uverbs_devnode
;
914 ret
= class_create_file(uverbs_class
, &class_attr_abi_version
.attr
);
916 printk(KERN_ERR
"user_verbs: couldn't create abi_version attribute\n");
920 ret
= ib_register_client(&uverbs_client
);
922 printk(KERN_ERR
"user_verbs: couldn't register client\n");
929 class_destroy(uverbs_class
);
932 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
938 static void __exit
ib_uverbs_cleanup(void)
940 ib_unregister_client(&uverbs_client
);
941 class_destroy(uverbs_class
);
942 unregister_chrdev_region(IB_UVERBS_BASE_DEV
, IB_UVERBS_MAX_DEVICES
);
944 unregister_chrdev_region(overflow_maj
, IB_UVERBS_MAX_DEVICES
);
945 idr_destroy(&ib_uverbs_pd_idr
);
946 idr_destroy(&ib_uverbs_mr_idr
);
947 idr_destroy(&ib_uverbs_mw_idr
);
948 idr_destroy(&ib_uverbs_ah_idr
);
949 idr_destroy(&ib_uverbs_cq_idr
);
950 idr_destroy(&ib_uverbs_qp_idr
);
951 idr_destroy(&ib_uverbs_srq_idr
);
954 module_init(ib_uverbs_init
);
955 module_exit(ib_uverbs_cleanup
);