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>
48 #include <asm/uaccess.h>
52 MODULE_AUTHOR("Roland Dreier");
53 MODULE_DESCRIPTION("InfiniBand userspace verbs access");
54 MODULE_LICENSE("Dual BSD/GPL");
57 IB_UVERBS_MAJOR = 231,
58 IB_UVERBS_BASE_MINOR = 192,
59 IB_UVERBS_MAX_DEVICES = 32
62 #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR)
64 static struct class *uverbs_class;
66 DEFINE_SPINLOCK(ib_uverbs_idr_lock);
67 DEFINE_IDR(ib_uverbs_pd_idr);
68 DEFINE_IDR(ib_uverbs_mr_idr);
69 DEFINE_IDR(ib_uverbs_mw_idr);
70 DEFINE_IDR(ib_uverbs_ah_idr);
71 DEFINE_IDR(ib_uverbs_cq_idr);
72 DEFINE_IDR(ib_uverbs_qp_idr);
73 DEFINE_IDR(ib_uverbs_srq_idr);
75 static DEFINE_SPINLOCK(map_lock);
76 static struct ib_uverbs_device *dev_table[IB_UVERBS_MAX_DEVICES];
77 static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
79 static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
80 const char __user *buf, int in_len,
82 [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context,
83 [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device,
84 [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port,
85 [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
86 [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
87 [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
88 [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
89 [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel,
90 [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq,
91 [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq,
92 [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq,
93 [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq,
94 [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq,
95 [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp,
96 [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp,
97 [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
98 [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
99 [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send,
100 [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv,
101 [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv,
102 [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah,
103 [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah,
104 [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
105 [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
106 [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq,
107 [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq,
108 [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq,
109 [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
112 static void ib_uverbs_add_one(struct ib_device *device);
113 static void ib_uverbs_remove_one(struct ib_device *device);
115 static void ib_uverbs_release_dev(struct kref *ref)
117 struct ib_uverbs_device *dev =
118 container_of(ref, struct ib_uverbs_device, ref);
120 complete(&dev->comp);
123 static void ib_uverbs_release_event_file(struct kref *ref)
125 struct ib_uverbs_event_file *file =
126 container_of(ref, struct ib_uverbs_event_file, ref);
131 void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
132 struct ib_uverbs_event_file *ev_file,
133 struct ib_ucq_object *uobj)
135 struct ib_uverbs_event *evt, *tmp;
138 spin_lock_irq(&ev_file->lock);
139 list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
140 list_del(&evt->list);
143 spin_unlock_irq(&ev_file->lock);
145 kref_put(&ev_file->ref, ib_uverbs_release_event_file);
148 spin_lock_irq(&file->async_file->lock);
149 list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
150 list_del(&evt->list);
153 spin_unlock_irq(&file->async_file->lock);
156 void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
157 struct ib_uevent_object *uobj)
159 struct ib_uverbs_event *evt, *tmp;
161 spin_lock_irq(&file->async_file->lock);
162 list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
163 list_del(&evt->list);
166 spin_unlock_irq(&file->async_file->lock);
169 static void ib_uverbs_detach_umcast(struct ib_qp *qp,
170 struct ib_uqp_object *uobj)
172 struct ib_uverbs_mcast_entry *mcast, *tmp;
174 list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
175 ib_detach_mcast(qp, &mcast->gid, mcast->lid);
176 list_del(&mcast->list);
181 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
182 struct ib_ucontext *context)
184 struct ib_uobject *uobj, *tmp;
189 context->closing = 1;
191 list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
192 struct ib_ah *ah = uobj->object;
194 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
199 list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
200 struct ib_qp *qp = uobj->object;
201 struct ib_uqp_object *uqp =
202 container_of(uobj, struct ib_uqp_object, uevent.uobject);
204 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
205 ib_uverbs_detach_umcast(qp, uqp);
207 ib_uverbs_release_uevent(file, &uqp->uevent);
211 list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
212 struct ib_cq *cq = uobj->object;
213 struct ib_uverbs_event_file *ev_file = cq->cq_context;
214 struct ib_ucq_object *ucq =
215 container_of(uobj, struct ib_ucq_object, uobject);
217 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
219 ib_uverbs_release_ucq(file, ev_file, ucq);
223 list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
224 struct ib_srq *srq = uobj->object;
225 struct ib_uevent_object *uevent =
226 container_of(uobj, struct ib_uevent_object, uobject);
228 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
230 ib_uverbs_release_uevent(file, uevent);
236 list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
237 struct ib_mr *mr = uobj->object;
239 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
244 list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
245 struct ib_pd *pd = uobj->object;
247 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
252 return context->device->dealloc_ucontext(context);
255 static void ib_uverbs_release_file(struct kref *ref)
257 struct ib_uverbs_file *file =
258 container_of(ref, struct ib_uverbs_file, ref);
260 module_put(file->device->ib_dev->owner);
261 kref_put(&file->device->ref, ib_uverbs_release_dev);
266 static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
267 size_t count, loff_t *pos)
269 struct ib_uverbs_event_file *file = filp->private_data;
270 struct ib_uverbs_event *event;
274 spin_lock_irq(&file->lock);
276 while (list_empty(&file->event_list)) {
277 spin_unlock_irq(&file->lock);
279 if (filp->f_flags & O_NONBLOCK)
282 if (wait_event_interruptible(file->poll_wait,
283 !list_empty(&file->event_list)))
286 spin_lock_irq(&file->lock);
289 event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
292 eventsz = sizeof (struct ib_uverbs_async_event_desc);
294 eventsz = sizeof (struct ib_uverbs_comp_event_desc);
296 if (eventsz > count) {
300 list_del(file->event_list.next);
301 if (event->counter) {
303 list_del(&event->obj_list);
307 spin_unlock_irq(&file->lock);
310 if (copy_to_user(buf, event, eventsz))
321 static unsigned int ib_uverbs_event_poll(struct file *filp,
322 struct poll_table_struct *wait)
324 unsigned int pollflags = 0;
325 struct ib_uverbs_event_file *file = filp->private_data;
327 poll_wait(filp, &file->poll_wait, wait);
329 spin_lock_irq(&file->lock);
330 if (!list_empty(&file->event_list))
331 pollflags = POLLIN | POLLRDNORM;
332 spin_unlock_irq(&file->lock);
337 static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
339 struct ib_uverbs_event_file *file = filp->private_data;
341 return fasync_helper(fd, filp, on, &file->async_queue);
344 static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
346 struct ib_uverbs_event_file *file = filp->private_data;
347 struct ib_uverbs_event *entry, *tmp;
349 spin_lock_irq(&file->lock);
351 list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
353 list_del(&entry->obj_list);
356 spin_unlock_irq(&file->lock);
358 if (file->is_async) {
359 ib_unregister_event_handler(&file->uverbs_file->event_handler);
360 kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
362 kref_put(&file->ref, ib_uverbs_release_event_file);
367 static const struct file_operations uverbs_event_fops = {
368 .owner = THIS_MODULE,
369 .read = ib_uverbs_event_read,
370 .poll = ib_uverbs_event_poll,
371 .release = ib_uverbs_event_close,
372 .fasync = ib_uverbs_event_fasync
375 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
377 struct ib_uverbs_event_file *file = cq_context;
378 struct ib_ucq_object *uobj;
379 struct ib_uverbs_event *entry;
385 spin_lock_irqsave(&file->lock, flags);
386 if (file->is_closed) {
387 spin_unlock_irqrestore(&file->lock, flags);
391 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
393 spin_unlock_irqrestore(&file->lock, flags);
397 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
399 entry->desc.comp.cq_handle = cq->uobject->user_handle;
400 entry->counter = &uobj->comp_events_reported;
402 list_add_tail(&entry->list, &file->event_list);
403 list_add_tail(&entry->obj_list, &uobj->comp_list);
404 spin_unlock_irqrestore(&file->lock, flags);
406 wake_up_interruptible(&file->poll_wait);
407 kill_fasync(&file->async_queue, SIGIO, POLL_IN);
410 static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
411 __u64 element, __u64 event,
412 struct list_head *obj_list,
415 struct ib_uverbs_event *entry;
418 spin_lock_irqsave(&file->async_file->lock, flags);
419 if (file->async_file->is_closed) {
420 spin_unlock_irqrestore(&file->async_file->lock, flags);
424 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
426 spin_unlock_irqrestore(&file->async_file->lock, flags);
430 entry->desc.async.element = element;
431 entry->desc.async.event_type = event;
432 entry->counter = counter;
434 list_add_tail(&entry->list, &file->async_file->event_list);
436 list_add_tail(&entry->obj_list, obj_list);
437 spin_unlock_irqrestore(&file->async_file->lock, flags);
439 wake_up_interruptible(&file->async_file->poll_wait);
440 kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
443 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
445 struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
446 struct ib_ucq_object, uobject);
448 ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle,
449 event->event, &uobj->async_list,
450 &uobj->async_events_reported);
453 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
455 struct ib_uevent_object *uobj;
457 uobj = container_of(event->element.qp->uobject,
458 struct ib_uevent_object, uobject);
460 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
461 event->event, &uobj->event_list,
462 &uobj->events_reported);
465 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
467 struct ib_uevent_object *uobj;
469 uobj = container_of(event->element.srq->uobject,
470 struct ib_uevent_object, uobject);
472 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
473 event->event, &uobj->event_list,
474 &uobj->events_reported);
477 void ib_uverbs_event_handler(struct ib_event_handler *handler,
478 struct ib_event *event)
480 struct ib_uverbs_file *file =
481 container_of(handler, struct ib_uverbs_file, event_handler);
483 ib_uverbs_async_handler(file, event->element.port_num, event->event,
487 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
488 int is_async, int *fd)
490 struct ib_uverbs_event_file *ev_file;
494 ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
496 return ERR_PTR(-ENOMEM);
498 kref_init(&ev_file->ref);
499 spin_lock_init(&ev_file->lock);
500 INIT_LIST_HEAD(&ev_file->event_list);
501 init_waitqueue_head(&ev_file->poll_wait);
502 ev_file->uverbs_file = uverbs_file;
503 ev_file->async_queue = NULL;
504 ev_file->is_async = is_async;
505 ev_file->is_closed = 0;
507 *fd = get_unused_fd();
513 filp = anon_inode_getfile("[uverbs-event]", &uverbs_event_fops,
531 * Look up a completion event file by FD. If lookup is successful,
532 * takes a ref to the event file struct that it returns; if
533 * unsuccessful, returns NULL.
535 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
537 struct ib_uverbs_event_file *ev_file = NULL;
544 if (filp->f_op != &uverbs_event_fops)
547 ev_file = filp->private_data;
548 if (ev_file->is_async) {
553 kref_get(&ev_file->ref);
560 static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
561 size_t count, loff_t *pos)
563 struct ib_uverbs_file *file = filp->private_data;
564 struct ib_uverbs_cmd_hdr hdr;
566 if (count < sizeof hdr)
569 if (copy_from_user(&hdr, buf, sizeof hdr))
572 if (hdr.in_words * 4 != count)
575 if (hdr.command < 0 ||
576 hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
577 !uverbs_cmd_table[hdr.command])
580 if (!file->ucontext &&
581 hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
584 if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
587 return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
588 hdr.in_words * 4, hdr.out_words * 4);
591 static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
593 struct ib_uverbs_file *file = filp->private_data;
598 return file->device->ib_dev->mmap(file->ucontext, vma);
602 * ib_uverbs_open() does not need the BKL:
604 * - dev_table[] accesses are protected by map_lock, the
605 * ib_uverbs_device structures are properly reference counted, and
606 * everything else is purely local to the file being created, so
607 * races against other open calls are not a problem;
608 * - there is no ioctl method to race against;
609 * - the device is added to dev_table[] as the last part of module
610 * initialization, the open method will either immediately run
611 * -ENXIO, or all required initialization will be done.
613 static int ib_uverbs_open(struct inode *inode, struct file *filp)
615 struct ib_uverbs_device *dev;
616 struct ib_uverbs_file *file;
619 spin_lock(&map_lock);
620 dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR];
623 spin_unlock(&map_lock);
628 if (!try_module_get(dev->ib_dev->owner)) {
633 file = kmalloc(sizeof *file, GFP_KERNEL);
640 file->ucontext = NULL;
641 file->async_file = NULL;
642 kref_init(&file->ref);
643 mutex_init(&file->mutex);
645 filp->private_data = file;
650 module_put(dev->ib_dev->owner);
653 kref_put(&dev->ref, ib_uverbs_release_dev);
657 static int ib_uverbs_close(struct inode *inode, struct file *filp)
659 struct ib_uverbs_file *file = filp->private_data;
661 ib_uverbs_cleanup_ucontext(file, file->ucontext);
663 if (file->async_file)
664 kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
666 kref_put(&file->ref, ib_uverbs_release_file);
671 static const struct file_operations uverbs_fops = {
672 .owner = THIS_MODULE,
673 .write = ib_uverbs_write,
674 .open = ib_uverbs_open,
675 .release = ib_uverbs_close
678 static const struct file_operations uverbs_mmap_fops = {
679 .owner = THIS_MODULE,
680 .write = ib_uverbs_write,
681 .mmap = ib_uverbs_mmap,
682 .open = ib_uverbs_open,
683 .release = ib_uverbs_close
686 static struct ib_client uverbs_client = {
688 .add = ib_uverbs_add_one,
689 .remove = ib_uverbs_remove_one
692 static ssize_t show_ibdev(struct device *device, struct device_attribute *attr,
695 struct ib_uverbs_device *dev = dev_get_drvdata(device);
700 return sprintf(buf, "%s\n", dev->ib_dev->name);
702 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
704 static ssize_t show_dev_abi_version(struct device *device,
705 struct device_attribute *attr, char *buf)
707 struct ib_uverbs_device *dev = dev_get_drvdata(device);
712 return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
714 static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
716 static ssize_t show_abi_version(struct class *class, char *buf)
718 return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION);
720 static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
722 static void ib_uverbs_add_one(struct ib_device *device)
724 struct ib_uverbs_device *uverbs_dev;
726 if (!device->alloc_ucontext)
729 uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL);
733 kref_init(&uverbs_dev->ref);
734 init_completion(&uverbs_dev->comp);
736 spin_lock(&map_lock);
737 uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
738 if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) {
739 spin_unlock(&map_lock);
742 set_bit(uverbs_dev->devnum, dev_map);
743 spin_unlock(&map_lock);
745 uverbs_dev->ib_dev = device;
746 uverbs_dev->num_comp_vectors = device->num_comp_vectors;
748 uverbs_dev->cdev = cdev_alloc();
749 if (!uverbs_dev->cdev)
751 uverbs_dev->cdev->owner = THIS_MODULE;
752 uverbs_dev->cdev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
753 kobject_set_name(&uverbs_dev->cdev->kobj, "uverbs%d", uverbs_dev->devnum);
754 if (cdev_add(uverbs_dev->cdev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1))
757 uverbs_dev->dev = device_create(uverbs_class, device->dma_device,
758 uverbs_dev->cdev->dev, uverbs_dev,
759 "uverbs%d", uverbs_dev->devnum);
760 if (IS_ERR(uverbs_dev->dev))
763 if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev))
765 if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version))
768 spin_lock(&map_lock);
769 dev_table[uverbs_dev->devnum] = uverbs_dev;
770 spin_unlock(&map_lock);
772 ib_set_client_data(device, &uverbs_client, uverbs_dev);
777 device_destroy(uverbs_class, uverbs_dev->cdev->dev);
780 cdev_del(uverbs_dev->cdev);
781 clear_bit(uverbs_dev->devnum, dev_map);
784 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
785 wait_for_completion(&uverbs_dev->comp);
790 static void ib_uverbs_remove_one(struct ib_device *device)
792 struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client);
797 dev_set_drvdata(uverbs_dev->dev, NULL);
798 device_destroy(uverbs_class, uverbs_dev->cdev->dev);
799 cdev_del(uverbs_dev->cdev);
801 spin_lock(&map_lock);
802 dev_table[uverbs_dev->devnum] = NULL;
803 spin_unlock(&map_lock);
805 clear_bit(uverbs_dev->devnum, dev_map);
807 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
808 wait_for_completion(&uverbs_dev->comp);
812 static int __init ib_uverbs_init(void)
816 ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES,
819 printk(KERN_ERR "user_verbs: couldn't register device number\n");
823 uverbs_class = class_create(THIS_MODULE, "infiniband_verbs");
824 if (IS_ERR(uverbs_class)) {
825 ret = PTR_ERR(uverbs_class);
826 printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n");
830 ret = class_create_file(uverbs_class, &class_attr_abi_version);
832 printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
836 ret = ib_register_client(&uverbs_client);
838 printk(KERN_ERR "user_verbs: couldn't register client\n");
845 class_destroy(uverbs_class);
848 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
854 static void __exit ib_uverbs_cleanup(void)
856 ib_unregister_client(&uverbs_client);
857 class_destroy(uverbs_class);
858 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
859 idr_destroy(&ib_uverbs_pd_idr);
860 idr_destroy(&ib_uverbs_mr_idr);
861 idr_destroy(&ib_uverbs_mw_idr);
862 idr_destroy(&ib_uverbs_ah_idr);
863 idr_destroy(&ib_uverbs_cq_idr);
864 idr_destroy(&ib_uverbs_qp_idr);
865 idr_destroy(&ib_uverbs_srq_idr);
868 module_init(ib_uverbs_init);
869 module_exit(ib_uverbs_cleanup);