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 DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
78 static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
79 const char __user *buf, int in_len,
81 [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context,
82 [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device,
83 [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port,
84 [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
85 [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
86 [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
87 [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
88 [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel,
89 [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq,
90 [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq,
91 [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq,
92 [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq,
93 [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq,
94 [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp,
95 [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp,
96 [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
97 [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
98 [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send,
99 [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv,
100 [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv,
101 [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah,
102 [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah,
103 [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
104 [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
105 [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq,
106 [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq,
107 [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq,
108 [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
111 static void ib_uverbs_add_one(struct ib_device *device);
112 static void ib_uverbs_remove_one(struct ib_device *device);
114 static void ib_uverbs_release_dev(struct kref *ref)
116 struct ib_uverbs_device *dev =
117 container_of(ref, struct ib_uverbs_device, ref);
119 complete(&dev->comp);
122 static void ib_uverbs_release_event_file(struct kref *ref)
124 struct ib_uverbs_event_file *file =
125 container_of(ref, struct ib_uverbs_event_file, ref);
130 void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
131 struct ib_uverbs_event_file *ev_file,
132 struct ib_ucq_object *uobj)
134 struct ib_uverbs_event *evt, *tmp;
137 spin_lock_irq(&ev_file->lock);
138 list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
139 list_del(&evt->list);
142 spin_unlock_irq(&ev_file->lock);
144 kref_put(&ev_file->ref, ib_uverbs_release_event_file);
147 spin_lock_irq(&file->async_file->lock);
148 list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
149 list_del(&evt->list);
152 spin_unlock_irq(&file->async_file->lock);
155 void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
156 struct ib_uevent_object *uobj)
158 struct ib_uverbs_event *evt, *tmp;
160 spin_lock_irq(&file->async_file->lock);
161 list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
162 list_del(&evt->list);
165 spin_unlock_irq(&file->async_file->lock);
168 static void ib_uverbs_detach_umcast(struct ib_qp *qp,
169 struct ib_uqp_object *uobj)
171 struct ib_uverbs_mcast_entry *mcast, *tmp;
173 list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
174 ib_detach_mcast(qp, &mcast->gid, mcast->lid);
175 list_del(&mcast->list);
180 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
181 struct ib_ucontext *context)
183 struct ib_uobject *uobj, *tmp;
188 context->closing = 1;
190 list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
191 struct ib_ah *ah = uobj->object;
193 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
198 list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
199 struct ib_qp *qp = uobj->object;
200 struct ib_uqp_object *uqp =
201 container_of(uobj, struct ib_uqp_object, uevent.uobject);
203 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
204 ib_uverbs_detach_umcast(qp, uqp);
206 ib_uverbs_release_uevent(file, &uqp->uevent);
210 list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
211 struct ib_cq *cq = uobj->object;
212 struct ib_uverbs_event_file *ev_file = cq->cq_context;
213 struct ib_ucq_object *ucq =
214 container_of(uobj, struct ib_ucq_object, uobject);
216 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
218 ib_uverbs_release_ucq(file, ev_file, ucq);
222 list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
223 struct ib_srq *srq = uobj->object;
224 struct ib_uevent_object *uevent =
225 container_of(uobj, struct ib_uevent_object, uobject);
227 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
229 ib_uverbs_release_uevent(file, uevent);
235 list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
236 struct ib_mr *mr = uobj->object;
238 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
243 list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
244 struct ib_pd *pd = uobj->object;
246 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
251 return context->device->dealloc_ucontext(context);
254 static void ib_uverbs_release_file(struct kref *ref)
256 struct ib_uverbs_file *file =
257 container_of(ref, struct ib_uverbs_file, ref);
259 module_put(file->device->ib_dev->owner);
260 kref_put(&file->device->ref, ib_uverbs_release_dev);
265 static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
266 size_t count, loff_t *pos)
268 struct ib_uverbs_event_file *file = filp->private_data;
269 struct ib_uverbs_event *event;
273 spin_lock_irq(&file->lock);
275 while (list_empty(&file->event_list)) {
276 spin_unlock_irq(&file->lock);
278 if (filp->f_flags & O_NONBLOCK)
281 if (wait_event_interruptible(file->poll_wait,
282 !list_empty(&file->event_list)))
285 spin_lock_irq(&file->lock);
288 event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
291 eventsz = sizeof (struct ib_uverbs_async_event_desc);
293 eventsz = sizeof (struct ib_uverbs_comp_event_desc);
295 if (eventsz > count) {
299 list_del(file->event_list.next);
300 if (event->counter) {
302 list_del(&event->obj_list);
306 spin_unlock_irq(&file->lock);
309 if (copy_to_user(buf, event, eventsz))
320 static unsigned int ib_uverbs_event_poll(struct file *filp,
321 struct poll_table_struct *wait)
323 unsigned int pollflags = 0;
324 struct ib_uverbs_event_file *file = filp->private_data;
326 poll_wait(filp, &file->poll_wait, wait);
328 spin_lock_irq(&file->lock);
329 if (!list_empty(&file->event_list))
330 pollflags = POLLIN | POLLRDNORM;
331 spin_unlock_irq(&file->lock);
336 static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
338 struct ib_uverbs_event_file *file = filp->private_data;
340 return fasync_helper(fd, filp, on, &file->async_queue);
343 static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
345 struct ib_uverbs_event_file *file = filp->private_data;
346 struct ib_uverbs_event *entry, *tmp;
348 spin_lock_irq(&file->lock);
350 list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
352 list_del(&entry->obj_list);
355 spin_unlock_irq(&file->lock);
357 if (file->is_async) {
358 ib_unregister_event_handler(&file->uverbs_file->event_handler);
359 kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
361 kref_put(&file->ref, ib_uverbs_release_event_file);
366 static const struct file_operations uverbs_event_fops = {
367 .owner = THIS_MODULE,
368 .read = ib_uverbs_event_read,
369 .poll = ib_uverbs_event_poll,
370 .release = ib_uverbs_event_close,
371 .fasync = ib_uverbs_event_fasync
374 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
376 struct ib_uverbs_event_file *file = cq_context;
377 struct ib_ucq_object *uobj;
378 struct ib_uverbs_event *entry;
384 spin_lock_irqsave(&file->lock, flags);
385 if (file->is_closed) {
386 spin_unlock_irqrestore(&file->lock, flags);
390 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
392 spin_unlock_irqrestore(&file->lock, flags);
396 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
398 entry->desc.comp.cq_handle = cq->uobject->user_handle;
399 entry->counter = &uobj->comp_events_reported;
401 list_add_tail(&entry->list, &file->event_list);
402 list_add_tail(&entry->obj_list, &uobj->comp_list);
403 spin_unlock_irqrestore(&file->lock, flags);
405 wake_up_interruptible(&file->poll_wait);
406 kill_fasync(&file->async_queue, SIGIO, POLL_IN);
409 static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
410 __u64 element, __u64 event,
411 struct list_head *obj_list,
414 struct ib_uverbs_event *entry;
417 spin_lock_irqsave(&file->async_file->lock, flags);
418 if (file->async_file->is_closed) {
419 spin_unlock_irqrestore(&file->async_file->lock, flags);
423 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
425 spin_unlock_irqrestore(&file->async_file->lock, flags);
429 entry->desc.async.element = element;
430 entry->desc.async.event_type = event;
431 entry->counter = counter;
433 list_add_tail(&entry->list, &file->async_file->event_list);
435 list_add_tail(&entry->obj_list, obj_list);
436 spin_unlock_irqrestore(&file->async_file->lock, flags);
438 wake_up_interruptible(&file->async_file->poll_wait);
439 kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
442 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
444 struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
445 struct ib_ucq_object, uobject);
447 ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle,
448 event->event, &uobj->async_list,
449 &uobj->async_events_reported);
452 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
454 struct ib_uevent_object *uobj;
456 uobj = container_of(event->element.qp->uobject,
457 struct ib_uevent_object, uobject);
459 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
460 event->event, &uobj->event_list,
461 &uobj->events_reported);
464 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
466 struct ib_uevent_object *uobj;
468 uobj = container_of(event->element.srq->uobject,
469 struct ib_uevent_object, uobject);
471 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
472 event->event, &uobj->event_list,
473 &uobj->events_reported);
476 void ib_uverbs_event_handler(struct ib_event_handler *handler,
477 struct ib_event *event)
479 struct ib_uverbs_file *file =
480 container_of(handler, struct ib_uverbs_file, event_handler);
482 ib_uverbs_async_handler(file, event->element.port_num, event->event,
486 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
489 struct ib_uverbs_event_file *ev_file;
492 ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
494 return ERR_PTR(-ENOMEM);
496 kref_init(&ev_file->ref);
497 spin_lock_init(&ev_file->lock);
498 INIT_LIST_HEAD(&ev_file->event_list);
499 init_waitqueue_head(&ev_file->poll_wait);
500 ev_file->uverbs_file = uverbs_file;
501 ev_file->async_queue = NULL;
502 ev_file->is_async = is_async;
503 ev_file->is_closed = 0;
505 filp = anon_inode_getfile("[infinibandevent]", &uverbs_event_fops,
514 * Look up a completion event file by FD. If lookup is successful,
515 * takes a ref to the event file struct that it returns; if
516 * unsuccessful, returns NULL.
518 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
520 struct ib_uverbs_event_file *ev_file = NULL;
527 if (filp->f_op != &uverbs_event_fops)
530 ev_file = filp->private_data;
531 if (ev_file->is_async) {
536 kref_get(&ev_file->ref);
543 static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
544 size_t count, loff_t *pos)
546 struct ib_uverbs_file *file = filp->private_data;
547 struct ib_uverbs_cmd_hdr hdr;
549 if (count < sizeof hdr)
552 if (copy_from_user(&hdr, buf, sizeof hdr))
555 if (hdr.in_words * 4 != count)
558 if (hdr.command < 0 ||
559 hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
560 !uverbs_cmd_table[hdr.command])
563 if (!file->ucontext &&
564 hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
567 if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
570 return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
571 hdr.in_words * 4, hdr.out_words * 4);
574 static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
576 struct ib_uverbs_file *file = filp->private_data;
581 return file->device->ib_dev->mmap(file->ucontext, vma);
585 * ib_uverbs_open() does not need the BKL:
587 * - the ib_uverbs_device structures are properly reference counted and
588 * everything else is purely local to the file being created, so
589 * races against other open calls are not a problem;
590 * - there is no ioctl method to race against;
591 * - the open method will either immediately run -ENXIO, or all
592 * required initialization will be done.
594 static int ib_uverbs_open(struct inode *inode, struct file *filp)
596 struct ib_uverbs_device *dev;
597 struct ib_uverbs_file *file;
600 dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev);
606 if (!try_module_get(dev->ib_dev->owner)) {
611 file = kmalloc(sizeof *file, GFP_KERNEL);
618 file->ucontext = NULL;
619 file->async_file = NULL;
620 kref_init(&file->ref);
621 mutex_init(&file->mutex);
623 filp->private_data = file;
628 module_put(dev->ib_dev->owner);
631 kref_put(&dev->ref, ib_uverbs_release_dev);
635 static int ib_uverbs_close(struct inode *inode, struct file *filp)
637 struct ib_uverbs_file *file = filp->private_data;
639 ib_uverbs_cleanup_ucontext(file, file->ucontext);
641 if (file->async_file)
642 kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
644 kref_put(&file->ref, ib_uverbs_release_file);
649 static const struct file_operations uverbs_fops = {
650 .owner = THIS_MODULE,
651 .write = ib_uverbs_write,
652 .open = ib_uverbs_open,
653 .release = ib_uverbs_close
656 static const struct file_operations uverbs_mmap_fops = {
657 .owner = THIS_MODULE,
658 .write = ib_uverbs_write,
659 .mmap = ib_uverbs_mmap,
660 .open = ib_uverbs_open,
661 .release = ib_uverbs_close
664 static struct ib_client uverbs_client = {
666 .add = ib_uverbs_add_one,
667 .remove = ib_uverbs_remove_one
670 static ssize_t show_ibdev(struct device *device, struct device_attribute *attr,
673 struct ib_uverbs_device *dev = dev_get_drvdata(device);
678 return sprintf(buf, "%s\n", dev->ib_dev->name);
680 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
682 static ssize_t show_dev_abi_version(struct device *device,
683 struct device_attribute *attr, char *buf)
685 struct ib_uverbs_device *dev = dev_get_drvdata(device);
690 return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
692 static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
694 static CLASS_ATTR_STRING(abi_version, S_IRUGO,
695 __stringify(IB_USER_VERBS_ABI_VERSION));
697 static dev_t overflow_maj;
698 static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES);
701 * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by
702 * requesting a new major number and doubling the number of max devices we
703 * support. It's stupid, but simple.
705 static int find_overflow_devnum(void)
710 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UVERBS_MAX_DEVICES,
713 printk(KERN_ERR "user_verbs: couldn't register dynamic device number\n");
718 ret = find_first_zero_bit(overflow_map, IB_UVERBS_MAX_DEVICES);
719 if (ret >= IB_UVERBS_MAX_DEVICES)
725 static void ib_uverbs_add_one(struct ib_device *device)
729 struct ib_uverbs_device *uverbs_dev;
731 if (!device->alloc_ucontext)
734 uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL);
738 kref_init(&uverbs_dev->ref);
739 init_completion(&uverbs_dev->comp);
741 spin_lock(&map_lock);
742 devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
743 if (devnum >= IB_UVERBS_MAX_DEVICES) {
744 spin_unlock(&map_lock);
745 devnum = find_overflow_devnum();
749 spin_lock(&map_lock);
750 uverbs_dev->devnum = devnum + IB_UVERBS_MAX_DEVICES;
751 base = devnum + overflow_maj;
752 set_bit(devnum, overflow_map);
754 uverbs_dev->devnum = devnum;
755 base = devnum + IB_UVERBS_BASE_DEV;
756 set_bit(devnum, dev_map);
758 spin_unlock(&map_lock);
760 uverbs_dev->ib_dev = device;
761 uverbs_dev->num_comp_vectors = device->num_comp_vectors;
763 cdev_init(&uverbs_dev->cdev, NULL);
764 uverbs_dev->cdev.owner = THIS_MODULE;
765 uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
766 kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum);
767 if (cdev_add(&uverbs_dev->cdev, base, 1))
770 uverbs_dev->dev = device_create(uverbs_class, device->dma_device,
771 uverbs_dev->cdev.dev, uverbs_dev,
772 "uverbs%d", uverbs_dev->devnum);
773 if (IS_ERR(uverbs_dev->dev))
776 if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev))
778 if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version))
781 ib_set_client_data(device, &uverbs_client, uverbs_dev);
786 device_destroy(uverbs_class, uverbs_dev->cdev.dev);
789 cdev_del(&uverbs_dev->cdev);
790 if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES)
791 clear_bit(devnum, dev_map);
793 clear_bit(devnum, overflow_map);
796 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
797 wait_for_completion(&uverbs_dev->comp);
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 dev_set_drvdata(uverbs_dev->dev, NULL);
810 device_destroy(uverbs_class, uverbs_dev->cdev.dev);
811 cdev_del(&uverbs_dev->cdev);
813 if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES)
814 clear_bit(uverbs_dev->devnum, dev_map);
816 clear_bit(uverbs_dev->devnum - IB_UVERBS_MAX_DEVICES, overflow_map);
818 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
819 wait_for_completion(&uverbs_dev->comp);
823 static int __init ib_uverbs_init(void)
827 ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES,
830 printk(KERN_ERR "user_verbs: couldn't register device number\n");
834 uverbs_class = class_create(THIS_MODULE, "infiniband_verbs");
835 if (IS_ERR(uverbs_class)) {
836 ret = PTR_ERR(uverbs_class);
837 printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n");
841 ret = class_create_file(uverbs_class, &class_attr_abi_version.attr);
843 printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
847 ret = ib_register_client(&uverbs_client);
849 printk(KERN_ERR "user_verbs: couldn't register client\n");
856 class_destroy(uverbs_class);
859 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
865 static void __exit ib_uverbs_cleanup(void)
867 ib_unregister_client(&uverbs_client);
868 class_destroy(uverbs_class);
869 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
871 unregister_chrdev_region(overflow_maj, IB_UVERBS_MAX_DEVICES);
872 idr_destroy(&ib_uverbs_pd_idr);
873 idr_destroy(&ib_uverbs_mr_idr);
874 idr_destroy(&ib_uverbs_mw_idr);
875 idr_destroy(&ib_uverbs_ah_idr);
876 idr_destroy(&ib_uverbs_cq_idr);
877 idr_destroy(&ib_uverbs_qp_idr);
878 idr_destroy(&ib_uverbs_srq_idr);
881 module_init(ib_uverbs_init);
882 module_exit(ib_uverbs_cleanup);