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_SPINLOCK(ib_uverbs_idr_lock);
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_QUERY_QP] = ib_uverbs_query_qp,
100 [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
101 [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
102 [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send,
103 [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv,
104 [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv,
105 [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah,
106 [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah,
107 [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
108 [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
109 [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq,
110 [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq,
111 [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq,
112 [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
115 static struct vfsmount *uverbs_event_mnt;
117 static void ib_uverbs_add_one(struct ib_device *device);
118 static void ib_uverbs_remove_one(struct ib_device *device);
120 static void ib_uverbs_release_dev(struct kref *ref)
122 struct ib_uverbs_device *dev =
123 container_of(ref, struct ib_uverbs_device, ref);
125 complete(&dev->comp);
128 static void ib_uverbs_release_event_file(struct kref *ref)
130 struct ib_uverbs_event_file *file =
131 container_of(ref, struct ib_uverbs_event_file, ref);
136 void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
137 struct ib_uverbs_event_file *ev_file,
138 struct ib_ucq_object *uobj)
140 struct ib_uverbs_event *evt, *tmp;
143 spin_lock_irq(&ev_file->lock);
144 list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
145 list_del(&evt->list);
148 spin_unlock_irq(&ev_file->lock);
150 kref_put(&ev_file->ref, ib_uverbs_release_event_file);
153 spin_lock_irq(&file->async_file->lock);
154 list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
155 list_del(&evt->list);
158 spin_unlock_irq(&file->async_file->lock);
161 void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
162 struct ib_uevent_object *uobj)
164 struct ib_uverbs_event *evt, *tmp;
166 spin_lock_irq(&file->async_file->lock);
167 list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
168 list_del(&evt->list);
171 spin_unlock_irq(&file->async_file->lock);
174 static void ib_uverbs_detach_umcast(struct ib_qp *qp,
175 struct ib_uqp_object *uobj)
177 struct ib_uverbs_mcast_entry *mcast, *tmp;
179 list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
180 ib_detach_mcast(qp, &mcast->gid, mcast->lid);
181 list_del(&mcast->list);
186 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
187 struct ib_ucontext *context)
189 struct ib_uobject *uobj, *tmp;
194 context->closing = 1;
196 list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
197 struct ib_ah *ah = uobj->object;
199 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
204 list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
205 struct ib_qp *qp = uobj->object;
206 struct ib_uqp_object *uqp =
207 container_of(uobj, struct ib_uqp_object, uevent.uobject);
209 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
210 ib_uverbs_detach_umcast(qp, uqp);
212 ib_uverbs_release_uevent(file, &uqp->uevent);
216 list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
217 struct ib_cq *cq = uobj->object;
218 struct ib_uverbs_event_file *ev_file = cq->cq_context;
219 struct ib_ucq_object *ucq =
220 container_of(uobj, struct ib_ucq_object, uobject);
222 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
224 ib_uverbs_release_ucq(file, ev_file, ucq);
228 list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
229 struct ib_srq *srq = uobj->object;
230 struct ib_uevent_object *uevent =
231 container_of(uobj, struct ib_uevent_object, uobject);
233 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
235 ib_uverbs_release_uevent(file, uevent);
241 list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
242 struct ib_mr *mr = uobj->object;
244 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
249 list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
250 struct ib_pd *pd = uobj->object;
252 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
257 return context->device->dealloc_ucontext(context);
260 static void ib_uverbs_release_file(struct kref *ref)
262 struct ib_uverbs_file *file =
263 container_of(ref, struct ib_uverbs_file, ref);
265 module_put(file->device->ib_dev->owner);
266 kref_put(&file->device->ref, ib_uverbs_release_dev);
271 static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
272 size_t count, loff_t *pos)
274 struct ib_uverbs_event_file *file = filp->private_data;
275 struct ib_uverbs_event *event;
279 spin_lock_irq(&file->lock);
281 while (list_empty(&file->event_list)) {
282 spin_unlock_irq(&file->lock);
284 if (filp->f_flags & O_NONBLOCK)
287 if (wait_event_interruptible(file->poll_wait,
288 !list_empty(&file->event_list)))
291 spin_lock_irq(&file->lock);
294 event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
297 eventsz = sizeof (struct ib_uverbs_async_event_desc);
299 eventsz = sizeof (struct ib_uverbs_comp_event_desc);
301 if (eventsz > count) {
305 list_del(file->event_list.next);
306 if (event->counter) {
308 list_del(&event->obj_list);
312 spin_unlock_irq(&file->lock);
315 if (copy_to_user(buf, event, eventsz))
326 static unsigned int ib_uverbs_event_poll(struct file *filp,
327 struct poll_table_struct *wait)
329 unsigned int pollflags = 0;
330 struct ib_uverbs_event_file *file = filp->private_data;
332 poll_wait(filp, &file->poll_wait, wait);
334 spin_lock_irq(&file->lock);
335 if (!list_empty(&file->event_list))
336 pollflags = POLLIN | POLLRDNORM;
337 spin_unlock_irq(&file->lock);
342 static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
344 struct ib_uverbs_event_file *file = filp->private_data;
346 return fasync_helper(fd, filp, on, &file->async_queue);
349 static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
351 struct ib_uverbs_event_file *file = filp->private_data;
352 struct ib_uverbs_event *entry, *tmp;
354 spin_lock_irq(&file->lock);
356 list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
358 list_del(&entry->obj_list);
361 spin_unlock_irq(&file->lock);
363 ib_uverbs_event_fasync(-1, filp, 0);
365 if (file->is_async) {
366 ib_unregister_event_handler(&file->uverbs_file->event_handler);
367 kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
369 kref_put(&file->ref, ib_uverbs_release_event_file);
374 static const struct file_operations uverbs_event_fops = {
375 .owner = THIS_MODULE,
376 .read = ib_uverbs_event_read,
377 .poll = ib_uverbs_event_poll,
378 .release = ib_uverbs_event_close,
379 .fasync = ib_uverbs_event_fasync
382 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
384 struct ib_uverbs_event_file *file = cq_context;
385 struct ib_ucq_object *uobj;
386 struct ib_uverbs_event *entry;
392 spin_lock_irqsave(&file->lock, flags);
394 spin_unlock_irqrestore(&file->lock, flags);
398 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
400 spin_unlock_irqrestore(&file->lock, flags);
404 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
406 entry->desc.comp.cq_handle = cq->uobject->user_handle;
407 entry->counter = &uobj->comp_events_reported;
409 list_add_tail(&entry->list, &file->event_list);
410 list_add_tail(&entry->obj_list, &uobj->comp_list);
411 spin_unlock_irqrestore(&file->lock, flags);
413 wake_up_interruptible(&file->poll_wait);
414 kill_fasync(&file->async_queue, SIGIO, POLL_IN);
417 static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
418 __u64 element, __u64 event,
419 struct list_head *obj_list,
422 struct ib_uverbs_event *entry;
425 spin_lock_irqsave(&file->async_file->lock, flags);
426 if (!file->async_file->file) {
427 spin_unlock_irqrestore(&file->async_file->lock, flags);
431 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
433 spin_unlock_irqrestore(&file->async_file->lock, flags);
437 entry->desc.async.element = element;
438 entry->desc.async.event_type = event;
439 entry->counter = counter;
441 list_add_tail(&entry->list, &file->async_file->event_list);
443 list_add_tail(&entry->obj_list, obj_list);
444 spin_unlock_irqrestore(&file->async_file->lock, flags);
446 wake_up_interruptible(&file->async_file->poll_wait);
447 kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
450 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
452 struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
453 struct ib_ucq_object, uobject);
455 ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle,
456 event->event, &uobj->async_list,
457 &uobj->async_events_reported);
460 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
462 struct ib_uevent_object *uobj;
464 uobj = container_of(event->element.qp->uobject,
465 struct ib_uevent_object, uobject);
467 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
468 event->event, &uobj->event_list,
469 &uobj->events_reported);
472 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
474 struct ib_uevent_object *uobj;
476 uobj = container_of(event->element.srq->uobject,
477 struct ib_uevent_object, uobject);
479 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
480 event->event, &uobj->event_list,
481 &uobj->events_reported);
484 void ib_uverbs_event_handler(struct ib_event_handler *handler,
485 struct ib_event *event)
487 struct ib_uverbs_file *file =
488 container_of(handler, struct ib_uverbs_file, event_handler);
490 ib_uverbs_async_handler(file, event->element.port_num, event->event,
494 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
495 int is_async, int *fd)
497 struct ib_uverbs_event_file *ev_file;
501 ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
503 return ERR_PTR(-ENOMEM);
505 kref_init(&ev_file->ref);
506 spin_lock_init(&ev_file->lock);
507 INIT_LIST_HEAD(&ev_file->event_list);
508 init_waitqueue_head(&ev_file->poll_wait);
509 ev_file->uverbs_file = uverbs_file;
510 ev_file->async_queue = NULL;
511 ev_file->is_async = is_async;
513 *fd = get_unused_fd();
519 filp = get_empty_filp();
525 ev_file->file = filp;
528 * fops_get() can't fail here, because we're coming from a
529 * system call on a uverbs file, which will already have a
532 filp->f_op = fops_get(&uverbs_event_fops);
533 filp->f_path.mnt = mntget(uverbs_event_mnt);
534 filp->f_path.dentry = dget(uverbs_event_mnt->mnt_root);
535 filp->f_mapping = filp->f_path.dentry->d_inode->i_mapping;
536 filp->f_flags = O_RDONLY;
537 filp->f_mode = FMODE_READ;
538 filp->private_data = ev_file;
551 * Look up a completion event file by FD. If lookup is successful,
552 * takes a ref to the event file struct that it returns; if
553 * unsuccessful, returns NULL.
555 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
557 struct ib_uverbs_event_file *ev_file = NULL;
564 if (filp->f_op != &uverbs_event_fops)
567 ev_file = filp->private_data;
568 if (ev_file->is_async) {
573 kref_get(&ev_file->ref);
580 static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
581 size_t count, loff_t *pos)
583 struct ib_uverbs_file *file = filp->private_data;
584 struct ib_uverbs_cmd_hdr hdr;
586 if (count < sizeof hdr)
589 if (copy_from_user(&hdr, buf, sizeof hdr))
592 if (hdr.in_words * 4 != count)
595 if (hdr.command < 0 ||
596 hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
597 !uverbs_cmd_table[hdr.command] ||
598 !(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
601 if (!file->ucontext &&
602 hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
605 return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
606 hdr.in_words * 4, hdr.out_words * 4);
609 static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
611 struct ib_uverbs_file *file = filp->private_data;
616 return file->device->ib_dev->mmap(file->ucontext, vma);
619 static int ib_uverbs_open(struct inode *inode, struct file *filp)
621 struct ib_uverbs_device *dev;
622 struct ib_uverbs_file *file;
625 spin_lock(&map_lock);
626 dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR];
629 spin_unlock(&map_lock);
634 if (!try_module_get(dev->ib_dev->owner)) {
639 file = kmalloc(sizeof *file, GFP_KERNEL);
646 file->ucontext = NULL;
647 file->async_file = NULL;
648 kref_init(&file->ref);
649 mutex_init(&file->mutex);
651 filp->private_data = file;
656 module_put(dev->ib_dev->owner);
659 kref_put(&dev->ref, ib_uverbs_release_dev);
664 static int ib_uverbs_close(struct inode *inode, struct file *filp)
666 struct ib_uverbs_file *file = filp->private_data;
668 ib_uverbs_cleanup_ucontext(file, file->ucontext);
670 if (file->async_file)
671 kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
673 kref_put(&file->ref, ib_uverbs_release_file);
678 static const struct file_operations uverbs_fops = {
679 .owner = THIS_MODULE,
680 .write = ib_uverbs_write,
681 .open = ib_uverbs_open,
682 .release = ib_uverbs_close
685 static const struct file_operations uverbs_mmap_fops = {
686 .owner = THIS_MODULE,
687 .write = ib_uverbs_write,
688 .mmap = ib_uverbs_mmap,
689 .open = ib_uverbs_open,
690 .release = ib_uverbs_close
693 static struct ib_client uverbs_client = {
695 .add = ib_uverbs_add_one,
696 .remove = ib_uverbs_remove_one
699 static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
701 struct ib_uverbs_device *dev = class_get_devdata(class_dev);
706 return sprintf(buf, "%s\n", dev->ib_dev->name);
708 static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
710 static ssize_t show_dev_abi_version(struct class_device *class_dev, char *buf)
712 struct ib_uverbs_device *dev = class_get_devdata(class_dev);
717 return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
719 static CLASS_DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
721 static ssize_t show_abi_version(struct class *class, char *buf)
723 return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION);
725 static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
727 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 uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
743 if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) {
744 spin_unlock(&map_lock);
747 set_bit(uverbs_dev->devnum, dev_map);
748 spin_unlock(&map_lock);
750 uverbs_dev->ib_dev = device;
751 uverbs_dev->num_comp_vectors = device->num_comp_vectors;
753 uverbs_dev->dev = cdev_alloc();
754 if (!uverbs_dev->dev)
756 uverbs_dev->dev->owner = THIS_MODULE;
757 uverbs_dev->dev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
758 kobject_set_name(&uverbs_dev->dev->kobj, "uverbs%d", uverbs_dev->devnum);
759 if (cdev_add(uverbs_dev->dev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1))
762 uverbs_dev->class_dev = class_device_create(uverbs_class, NULL,
763 uverbs_dev->dev->dev,
765 "uverbs%d", uverbs_dev->devnum);
766 if (IS_ERR(uverbs_dev->class_dev))
769 class_set_devdata(uverbs_dev->class_dev, uverbs_dev);
771 if (class_device_create_file(uverbs_dev->class_dev, &class_device_attr_ibdev))
773 if (class_device_create_file(uverbs_dev->class_dev, &class_device_attr_abi_version))
776 spin_lock(&map_lock);
777 dev_table[uverbs_dev->devnum] = uverbs_dev;
778 spin_unlock(&map_lock);
780 ib_set_client_data(device, &uverbs_client, uverbs_dev);
785 class_device_destroy(uverbs_class, uverbs_dev->dev->dev);
788 cdev_del(uverbs_dev->dev);
789 clear_bit(uverbs_dev->devnum, dev_map);
792 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
793 wait_for_completion(&uverbs_dev->comp);
798 static void ib_uverbs_remove_one(struct ib_device *device)
800 struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client);
805 class_set_devdata(uverbs_dev->class_dev, NULL);
806 class_device_destroy(uverbs_class, uverbs_dev->dev->dev);
807 cdev_del(uverbs_dev->dev);
809 spin_lock(&map_lock);
810 dev_table[uverbs_dev->devnum] = NULL;
811 spin_unlock(&map_lock);
813 clear_bit(uverbs_dev->devnum, dev_map);
815 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
816 wait_for_completion(&uverbs_dev->comp);
820 static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
821 const char *dev_name, void *data,
822 struct vfsmount *mnt)
824 return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
825 INFINIBANDEVENTFS_MAGIC, mnt);
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);