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);
128 void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
129 struct ib_uverbs_event_file *ev_file,
130 struct ib_ucq_object *uobj)
132 struct ib_uverbs_event *evt, *tmp;
135 spin_lock_irq(&ev_file->lock);
136 list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
137 list_del(&evt->list);
140 spin_unlock_irq(&ev_file->lock);
142 kref_put(&ev_file->ref, ib_uverbs_release_event_file);
145 spin_lock_irq(&file->async_file->lock);
146 list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
147 list_del(&evt->list);
150 spin_unlock_irq(&file->async_file->lock);
153 void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
154 struct ib_uevent_object *uobj)
156 struct ib_uverbs_event *evt, *tmp;
158 spin_lock_irq(&file->async_file->lock);
159 list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
160 list_del(&evt->list);
163 spin_unlock_irq(&file->async_file->lock);
166 static void ib_uverbs_detach_umcast(struct ib_qp *qp,
167 struct ib_uqp_object *uobj)
169 struct ib_uverbs_mcast_entry *mcast, *tmp;
171 list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
172 ib_detach_mcast(qp, &mcast->gid, mcast->lid);
173 list_del(&mcast->list);
178 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
179 struct ib_ucontext *context)
181 struct ib_uobject *uobj, *tmp;
186 list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
187 struct ib_ah *ah = uobj->object;
189 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
191 list_del(&uobj->list);
195 list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
196 struct ib_qp *qp = uobj->object;
197 struct ib_uqp_object *uqp =
198 container_of(uobj, struct ib_uqp_object, uevent.uobject);
200 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
201 ib_uverbs_detach_umcast(qp, uqp);
203 list_del(&uobj->list);
204 ib_uverbs_release_uevent(file, &uqp->uevent);
208 list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
209 struct ib_cq *cq = uobj->object;
210 struct ib_uverbs_event_file *ev_file = cq->cq_context;
211 struct ib_ucq_object *ucq =
212 container_of(uobj, struct ib_ucq_object, uobject);
214 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
216 list_del(&uobj->list);
217 ib_uverbs_release_ucq(file, ev_file, ucq);
221 list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
222 struct ib_srq *srq = uobj->object;
223 struct ib_uevent_object *uevent =
224 container_of(uobj, struct ib_uevent_object, uobject);
226 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
228 list_del(&uobj->list);
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;
237 struct ib_device *mrdev = mr->device;
238 struct ib_umem_object *memobj;
240 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
243 memobj = container_of(uobj, struct ib_umem_object, uobject);
244 ib_umem_release_on_close(mrdev, &memobj->umem);
246 list_del(&uobj->list);
250 list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
251 struct ib_pd *pd = uobj->object;
253 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
255 list_del(&uobj->list);
259 return context->device->dealloc_ucontext(context);
262 static void ib_uverbs_release_file(struct kref *ref)
264 struct ib_uverbs_file *file =
265 container_of(ref, struct ib_uverbs_file, ref);
267 module_put(file->device->ib_dev->owner);
268 kref_put(&file->device->ref, ib_uverbs_release_dev);
273 static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
274 size_t count, loff_t *pos)
276 struct ib_uverbs_event_file *file = filp->private_data;
277 struct ib_uverbs_event *event;
281 spin_lock_irq(&file->lock);
283 while (list_empty(&file->event_list)) {
284 spin_unlock_irq(&file->lock);
286 if (filp->f_flags & O_NONBLOCK)
289 if (wait_event_interruptible(file->poll_wait,
290 !list_empty(&file->event_list)))
293 spin_lock_irq(&file->lock);
296 event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
299 eventsz = sizeof (struct ib_uverbs_async_event_desc);
301 eventsz = sizeof (struct ib_uverbs_comp_event_desc);
303 if (eventsz > count) {
307 list_del(file->event_list.next);
308 if (event->counter) {
310 list_del(&event->obj_list);
314 spin_unlock_irq(&file->lock);
317 if (copy_to_user(buf, event, eventsz))
328 static unsigned int ib_uverbs_event_poll(struct file *filp,
329 struct poll_table_struct *wait)
331 unsigned int pollflags = 0;
332 struct ib_uverbs_event_file *file = filp->private_data;
334 poll_wait(filp, &file->poll_wait, wait);
336 spin_lock_irq(&file->lock);
337 if (!list_empty(&file->event_list))
338 pollflags = POLLIN | POLLRDNORM;
339 spin_unlock_irq(&file->lock);
344 void ib_uverbs_release_event_file(struct kref *ref)
346 struct ib_uverbs_event_file *file =
347 container_of(ref, struct ib_uverbs_event_file, ref);
352 static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
354 struct ib_uverbs_event_file *file = filp->private_data;
356 return fasync_helper(fd, filp, on, &file->async_queue);
359 static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
361 struct ib_uverbs_event_file *file = filp->private_data;
362 struct ib_uverbs_event *entry, *tmp;
364 spin_lock_irq(&file->lock);
366 list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
368 list_del(&entry->obj_list);
371 spin_unlock_irq(&file->lock);
373 ib_uverbs_event_fasync(-1, filp, 0);
375 if (file->is_async) {
376 ib_unregister_event_handler(&file->uverbs_file->event_handler);
377 kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
379 kref_put(&file->ref, ib_uverbs_release_event_file);
384 static struct file_operations uverbs_event_fops = {
385 .owner = THIS_MODULE,
386 .read = ib_uverbs_event_read,
387 .poll = ib_uverbs_event_poll,
388 .release = ib_uverbs_event_close,
389 .fasync = ib_uverbs_event_fasync
392 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
394 struct ib_uverbs_event_file *file = cq_context;
395 struct ib_ucq_object *uobj;
396 struct ib_uverbs_event *entry;
402 spin_lock_irqsave(&file->lock, flags);
404 spin_unlock_irqrestore(&file->lock, flags);
408 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
410 spin_unlock_irqrestore(&file->lock, flags);
414 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
416 entry->desc.comp.cq_handle = cq->uobject->user_handle;
417 entry->counter = &uobj->comp_events_reported;
419 list_add_tail(&entry->list, &file->event_list);
420 list_add_tail(&entry->obj_list, &uobj->comp_list);
421 spin_unlock_irqrestore(&file->lock, flags);
423 wake_up_interruptible(&file->poll_wait);
424 kill_fasync(&file->async_queue, SIGIO, POLL_IN);
427 static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
428 __u64 element, __u64 event,
429 struct list_head *obj_list,
432 struct ib_uverbs_event *entry;
435 spin_lock_irqsave(&file->async_file->lock, flags);
436 if (!file->async_file->file) {
437 spin_unlock_irqrestore(&file->async_file->lock, flags);
441 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
443 spin_unlock_irqrestore(&file->async_file->lock, flags);
447 entry->desc.async.element = element;
448 entry->desc.async.event_type = event;
449 entry->counter = counter;
451 list_add_tail(&entry->list, &file->async_file->event_list);
453 list_add_tail(&entry->obj_list, obj_list);
454 spin_unlock_irqrestore(&file->async_file->lock, flags);
456 wake_up_interruptible(&file->async_file->poll_wait);
457 kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
460 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
462 struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
463 struct ib_ucq_object, uobject);
465 ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle,
466 event->event, &uobj->async_list,
467 &uobj->async_events_reported);
470 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
472 struct ib_uevent_object *uobj;
474 uobj = container_of(event->element.qp->uobject,
475 struct ib_uevent_object, uobject);
477 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
478 event->event, &uobj->event_list,
479 &uobj->events_reported);
482 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
484 struct ib_uevent_object *uobj;
486 uobj = container_of(event->element.srq->uobject,
487 struct ib_uevent_object, uobject);
489 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
490 event->event, &uobj->event_list,
491 &uobj->events_reported);
494 void ib_uverbs_event_handler(struct ib_event_handler *handler,
495 struct ib_event *event)
497 struct ib_uverbs_file *file =
498 container_of(handler, struct ib_uverbs_file, event_handler);
500 ib_uverbs_async_handler(file, event->element.port_num, event->event,
504 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
505 int is_async, int *fd)
507 struct ib_uverbs_event_file *ev_file;
511 ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
513 return ERR_PTR(-ENOMEM);
515 kref_init(&ev_file->ref);
516 spin_lock_init(&ev_file->lock);
517 INIT_LIST_HEAD(&ev_file->event_list);
518 init_waitqueue_head(&ev_file->poll_wait);
519 ev_file->uverbs_file = uverbs_file;
520 ev_file->async_queue = NULL;
521 ev_file->is_async = is_async;
523 *fd = get_unused_fd();
529 filp = get_empty_filp();
535 ev_file->file = filp;
538 * fops_get() can't fail here, because we're coming from a
539 * system call on a uverbs file, which will already have a
542 filp->f_op = fops_get(&uverbs_event_fops);
543 filp->f_vfsmnt = mntget(uverbs_event_mnt);
544 filp->f_dentry = dget(uverbs_event_mnt->mnt_root);
545 filp->f_mapping = filp->f_dentry->d_inode->i_mapping;
546 filp->f_flags = O_RDONLY;
547 filp->f_mode = FMODE_READ;
548 filp->private_data = ev_file;
561 * Look up a completion event file by FD. If lookup is successful,
562 * takes a ref to the event file struct that it returns; if
563 * unsuccessful, returns NULL.
565 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
567 struct ib_uverbs_event_file *ev_file = NULL;
574 if (filp->f_op != &uverbs_event_fops)
577 ev_file = filp->private_data;
578 if (ev_file->is_async) {
583 kref_get(&ev_file->ref);
590 static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
591 size_t count, loff_t *pos)
593 struct ib_uverbs_file *file = filp->private_data;
594 struct ib_uverbs_cmd_hdr hdr;
596 if (count < sizeof hdr)
599 if (copy_from_user(&hdr, buf, sizeof hdr))
602 if (hdr.in_words * 4 != count)
605 if (hdr.command < 0 ||
606 hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
607 !uverbs_cmd_table[hdr.command] ||
608 !(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
611 if (!file->ucontext &&
612 hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
615 return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
616 hdr.in_words * 4, hdr.out_words * 4);
619 static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
621 struct ib_uverbs_file *file = filp->private_data;
626 return file->device->ib_dev->mmap(file->ucontext, vma);
629 static int ib_uverbs_open(struct inode *inode, struct file *filp)
631 struct ib_uverbs_device *dev;
632 struct ib_uverbs_file *file;
635 spin_lock(&map_lock);
636 dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR];
639 spin_unlock(&map_lock);
644 if (!try_module_get(dev->ib_dev->owner)) {
649 file = kmalloc(sizeof *file, GFP_KERNEL);
656 file->ucontext = NULL;
657 file->async_file = NULL;
658 kref_init(&file->ref);
659 mutex_init(&file->mutex);
661 filp->private_data = file;
666 module_put(dev->ib_dev->owner);
669 kref_put(&dev->ref, ib_uverbs_release_dev);
674 static int ib_uverbs_close(struct inode *inode, struct file *filp)
676 struct ib_uverbs_file *file = filp->private_data;
678 ib_uverbs_cleanup_ucontext(file, file->ucontext);
680 if (file->async_file)
681 kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
683 kref_put(&file->ref, ib_uverbs_release_file);
688 static struct file_operations uverbs_fops = {
689 .owner = THIS_MODULE,
690 .write = ib_uverbs_write,
691 .open = ib_uverbs_open,
692 .release = ib_uverbs_close
695 static struct file_operations uverbs_mmap_fops = {
696 .owner = THIS_MODULE,
697 .write = ib_uverbs_write,
698 .mmap = ib_uverbs_mmap,
699 .open = ib_uverbs_open,
700 .release = ib_uverbs_close
703 static struct ib_client uverbs_client = {
705 .add = ib_uverbs_add_one,
706 .remove = ib_uverbs_remove_one
709 static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
711 struct ib_uverbs_device *dev = class_get_devdata(class_dev);
716 return sprintf(buf, "%s\n", dev->ib_dev->name);
718 static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
720 static ssize_t show_dev_abi_version(struct class_device *class_dev, char *buf)
722 struct ib_uverbs_device *dev = class_get_devdata(class_dev);
727 return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
729 static CLASS_DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
731 static ssize_t show_abi_version(struct class *class, char *buf)
733 return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION);
735 static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
737 static void ib_uverbs_add_one(struct ib_device *device)
739 struct ib_uverbs_device *uverbs_dev;
741 if (!device->alloc_ucontext)
744 uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL);
748 kref_init(&uverbs_dev->ref);
750 spin_lock(&map_lock);
751 uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
752 if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) {
753 spin_unlock(&map_lock);
756 set_bit(uverbs_dev->devnum, dev_map);
757 spin_unlock(&map_lock);
759 uverbs_dev->ib_dev = device;
760 uverbs_dev->num_comp_vectors = 1;
762 uverbs_dev->dev = cdev_alloc();
763 if (!uverbs_dev->dev)
765 uverbs_dev->dev->owner = THIS_MODULE;
766 uverbs_dev->dev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
767 kobject_set_name(&uverbs_dev->dev->kobj, "uverbs%d", uverbs_dev->devnum);
768 if (cdev_add(uverbs_dev->dev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1))
771 uverbs_dev->class_dev = class_device_create(uverbs_class, NULL,
772 uverbs_dev->dev->dev,
774 "uverbs%d", uverbs_dev->devnum);
775 if (IS_ERR(uverbs_dev->class_dev))
778 class_set_devdata(uverbs_dev->class_dev, uverbs_dev);
780 if (class_device_create_file(uverbs_dev->class_dev, &class_device_attr_ibdev))
782 if (class_device_create_file(uverbs_dev->class_dev, &class_device_attr_abi_version))
785 spin_lock(&map_lock);
786 dev_table[uverbs_dev->devnum] = uverbs_dev;
787 spin_unlock(&map_lock);
789 ib_set_client_data(device, &uverbs_client, uverbs_dev);
794 class_device_destroy(uverbs_class, uverbs_dev->dev->dev);
797 cdev_del(uverbs_dev->dev);
798 clear_bit(uverbs_dev->devnum, dev_map);
801 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
805 static void ib_uverbs_remove_one(struct ib_device *device)
807 struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client);
812 class_set_devdata(uverbs_dev->class_dev, NULL);
813 class_device_destroy(uverbs_class, uverbs_dev->dev->dev);
814 cdev_del(uverbs_dev->dev);
816 spin_lock(&map_lock);
817 dev_table[uverbs_dev->devnum] = NULL;
818 spin_unlock(&map_lock);
820 clear_bit(uverbs_dev->devnum, dev_map);
821 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
824 static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
825 const char *dev_name, void *data,
826 struct vfsmount *mnt)
828 return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
829 INFINIBANDEVENTFS_MAGIC, mnt);
832 static struct file_system_type uverbs_event_fs = {
833 /* No owner field so module can be unloaded */
834 .name = "infinibandeventfs",
835 .get_sb = uverbs_event_get_sb,
836 .kill_sb = kill_litter_super
839 static int __init ib_uverbs_init(void)
843 spin_lock_init(&map_lock);
845 ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES,
848 printk(KERN_ERR "user_verbs: couldn't register device number\n");
852 uverbs_class = class_create(THIS_MODULE, "infiniband_verbs");
853 if (IS_ERR(uverbs_class)) {
854 ret = PTR_ERR(uverbs_class);
855 printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n");
859 ret = class_create_file(uverbs_class, &class_attr_abi_version);
861 printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
865 ret = register_filesystem(&uverbs_event_fs);
867 printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n");
871 uverbs_event_mnt = kern_mount(&uverbs_event_fs);
872 if (IS_ERR(uverbs_event_mnt)) {
873 ret = PTR_ERR(uverbs_event_mnt);
874 printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n");
878 ret = ib_register_client(&uverbs_client);
880 printk(KERN_ERR "user_verbs: couldn't register client\n");
887 mntput(uverbs_event_mnt);
890 unregister_filesystem(&uverbs_event_fs);
893 class_destroy(uverbs_class);
896 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
902 static void __exit ib_uverbs_cleanup(void)
904 ib_unregister_client(&uverbs_client);
905 mntput(uverbs_event_mnt);
906 unregister_filesystem(&uverbs_event_fs);
907 class_destroy(uverbs_class);
908 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
909 flush_scheduled_work();
910 idr_destroy(&ib_uverbs_pd_idr);
911 idr_destroy(&ib_uverbs_mr_idr);
912 idr_destroy(&ib_uverbs_mw_idr);
913 idr_destroy(&ib_uverbs_ah_idr);
914 idr_destroy(&ib_uverbs_cq_idr);
915 idr_destroy(&ib_uverbs_qp_idr);
916 idr_destroy(&ib_uverbs_srq_idr);
919 module_init(ib_uverbs_init);
920 module_exit(ib_uverbs_cleanup);