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/mount.h>
47 #include <asm/uaccess.h>
51 MODULE_AUTHOR("Roland Dreier");
52 MODULE_DESCRIPTION("InfiniBand userspace verbs access");
53 MODULE_LICENSE("Dual BSD/GPL");
55 #define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */
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);
76 static DEFINE_SPINLOCK(map_lock);
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 struct vfsmount *uverbs_event_mnt;
114 static void ib_uverbs_add_one(struct ib_device *device);
115 static void ib_uverbs_remove_one(struct ib_device *device);
117 static void ib_uverbs_release_dev(struct kref *ref)
119 struct ib_uverbs_device *dev =
120 container_of(ref, struct ib_uverbs_device, ref);
122 complete(&dev->comp);
125 static void ib_uverbs_release_event_file(struct kref *ref)
127 struct ib_uverbs_event_file *file =
128 container_of(ref, struct ib_uverbs_event_file, ref);
133 void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
134 struct ib_uverbs_event_file *ev_file,
135 struct ib_ucq_object *uobj)
137 struct ib_uverbs_event *evt, *tmp;
140 spin_lock_irq(&ev_file->lock);
141 list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
142 list_del(&evt->list);
145 spin_unlock_irq(&ev_file->lock);
147 kref_put(&ev_file->ref, ib_uverbs_release_event_file);
150 spin_lock_irq(&file->async_file->lock);
151 list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
152 list_del(&evt->list);
155 spin_unlock_irq(&file->async_file->lock);
158 void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
159 struct ib_uevent_object *uobj)
161 struct ib_uverbs_event *evt, *tmp;
163 spin_lock_irq(&file->async_file->lock);
164 list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
165 list_del(&evt->list);
168 spin_unlock_irq(&file->async_file->lock);
171 static void ib_uverbs_detach_umcast(struct ib_qp *qp,
172 struct ib_uqp_object *uobj)
174 struct ib_uverbs_mcast_entry *mcast, *tmp;
176 list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
177 ib_detach_mcast(qp, &mcast->gid, mcast->lid);
178 list_del(&mcast->list);
183 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
184 struct ib_ucontext *context)
186 struct ib_uobject *uobj, *tmp;
191 context->closing = 1;
193 list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
194 struct ib_ah *ah = uobj->object;
196 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
201 list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
202 struct ib_qp *qp = uobj->object;
203 struct ib_uqp_object *uqp =
204 container_of(uobj, struct ib_uqp_object, uevent.uobject);
206 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
207 ib_uverbs_detach_umcast(qp, uqp);
209 ib_uverbs_release_uevent(file, &uqp->uevent);
213 list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
214 struct ib_cq *cq = uobj->object;
215 struct ib_uverbs_event_file *ev_file = cq->cq_context;
216 struct ib_ucq_object *ucq =
217 container_of(uobj, struct ib_ucq_object, uobject);
219 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
221 ib_uverbs_release_ucq(file, ev_file, ucq);
225 list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
226 struct ib_srq *srq = uobj->object;
227 struct ib_uevent_object *uevent =
228 container_of(uobj, struct ib_uevent_object, uobject);
230 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
232 ib_uverbs_release_uevent(file, uevent);
238 list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
239 struct ib_mr *mr = uobj->object;
241 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
246 list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
247 struct ib_pd *pd = uobj->object;
249 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
254 return context->device->dealloc_ucontext(context);
257 static void ib_uverbs_release_file(struct kref *ref)
259 struct ib_uverbs_file *file =
260 container_of(ref, struct ib_uverbs_file, ref);
262 module_put(file->device->ib_dev->owner);
263 kref_put(&file->device->ref, ib_uverbs_release_dev);
268 static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
269 size_t count, loff_t *pos)
271 struct ib_uverbs_event_file *file = filp->private_data;
272 struct ib_uverbs_event *event;
276 spin_lock_irq(&file->lock);
278 while (list_empty(&file->event_list)) {
279 spin_unlock_irq(&file->lock);
281 if (filp->f_flags & O_NONBLOCK)
284 if (wait_event_interruptible(file->poll_wait,
285 !list_empty(&file->event_list)))
288 spin_lock_irq(&file->lock);
291 event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
294 eventsz = sizeof (struct ib_uverbs_async_event_desc);
296 eventsz = sizeof (struct ib_uverbs_comp_event_desc);
298 if (eventsz > count) {
302 list_del(file->event_list.next);
303 if (event->counter) {
305 list_del(&event->obj_list);
309 spin_unlock_irq(&file->lock);
312 if (copy_to_user(buf, event, eventsz))
323 static unsigned int ib_uverbs_event_poll(struct file *filp,
324 struct poll_table_struct *wait)
326 unsigned int pollflags = 0;
327 struct ib_uverbs_event_file *file = filp->private_data;
329 poll_wait(filp, &file->poll_wait, wait);
331 spin_lock_irq(&file->lock);
332 if (!list_empty(&file->event_list))
333 pollflags = POLLIN | POLLRDNORM;
334 spin_unlock_irq(&file->lock);
339 static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
341 struct ib_uverbs_event_file *file = filp->private_data;
343 return fasync_helper(fd, filp, on, &file->async_queue);
346 static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
348 struct ib_uverbs_event_file *file = filp->private_data;
349 struct ib_uverbs_event *entry, *tmp;
351 spin_lock_irq(&file->lock);
353 list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
355 list_del(&entry->obj_list);
358 spin_unlock_irq(&file->lock);
360 if (file->is_async) {
361 ib_unregister_event_handler(&file->uverbs_file->event_handler);
362 kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
364 kref_put(&file->ref, ib_uverbs_release_event_file);
369 static const struct file_operations uverbs_event_fops = {
370 .owner = THIS_MODULE,
371 .read = ib_uverbs_event_read,
372 .poll = ib_uverbs_event_poll,
373 .release = ib_uverbs_event_close,
374 .fasync = ib_uverbs_event_fasync
377 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
379 struct ib_uverbs_event_file *file = cq_context;
380 struct ib_ucq_object *uobj;
381 struct ib_uverbs_event *entry;
387 spin_lock_irqsave(&file->lock, flags);
388 if (file->is_closed) {
389 spin_unlock_irqrestore(&file->lock, flags);
393 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
395 spin_unlock_irqrestore(&file->lock, flags);
399 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
401 entry->desc.comp.cq_handle = cq->uobject->user_handle;
402 entry->counter = &uobj->comp_events_reported;
404 list_add_tail(&entry->list, &file->event_list);
405 list_add_tail(&entry->obj_list, &uobj->comp_list);
406 spin_unlock_irqrestore(&file->lock, flags);
408 wake_up_interruptible(&file->poll_wait);
409 kill_fasync(&file->async_queue, SIGIO, POLL_IN);
412 static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
413 __u64 element, __u64 event,
414 struct list_head *obj_list,
417 struct ib_uverbs_event *entry;
420 spin_lock_irqsave(&file->async_file->lock, flags);
421 if (file->async_file->is_closed) {
422 spin_unlock_irqrestore(&file->async_file->lock, flags);
426 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
428 spin_unlock_irqrestore(&file->async_file->lock, flags);
432 entry->desc.async.element = element;
433 entry->desc.async.event_type = event;
434 entry->counter = counter;
436 list_add_tail(&entry->list, &file->async_file->event_list);
438 list_add_tail(&entry->obj_list, obj_list);
439 spin_unlock_irqrestore(&file->async_file->lock, flags);
441 wake_up_interruptible(&file->async_file->poll_wait);
442 kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
445 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
447 struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
448 struct ib_ucq_object, uobject);
450 ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle,
451 event->event, &uobj->async_list,
452 &uobj->async_events_reported);
455 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
457 struct ib_uevent_object *uobj;
459 uobj = container_of(event->element.qp->uobject,
460 struct ib_uevent_object, uobject);
462 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
463 event->event, &uobj->event_list,
464 &uobj->events_reported);
467 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
469 struct ib_uevent_object *uobj;
471 uobj = container_of(event->element.srq->uobject,
472 struct ib_uevent_object, uobject);
474 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
475 event->event, &uobj->event_list,
476 &uobj->events_reported);
479 void ib_uverbs_event_handler(struct ib_event_handler *handler,
480 struct ib_event *event)
482 struct ib_uverbs_file *file =
483 container_of(handler, struct ib_uverbs_file, event_handler);
485 ib_uverbs_async_handler(file, event->element.port_num, event->event,
489 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
490 int is_async, int *fd)
492 struct ib_uverbs_event_file *ev_file;
497 ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
499 return ERR_PTR(-ENOMEM);
501 kref_init(&ev_file->ref);
502 spin_lock_init(&ev_file->lock);
503 INIT_LIST_HEAD(&ev_file->event_list);
504 init_waitqueue_head(&ev_file->poll_wait);
505 ev_file->uverbs_file = uverbs_file;
506 ev_file->async_queue = NULL;
507 ev_file->is_async = is_async;
508 ev_file->is_closed = 0;
510 *fd = get_unused_fd();
517 * fops_get() can't fail here, because we're coming from a
518 * system call on a uverbs file, which will already have a
521 path.mnt = uverbs_event_mnt;
522 path.dentry = uverbs_event_mnt->mnt_root;
524 filp = alloc_file(&path, FMODE_READ, fops_get(&uverbs_event_fops));
530 filp->private_data = ev_file;
535 fops_put(&uverbs_event_fops);
545 * Look up a completion event file by FD. If lookup is successful,
546 * takes a ref to the event file struct that it returns; if
547 * unsuccessful, returns NULL.
549 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
551 struct ib_uverbs_event_file *ev_file = NULL;
558 if (filp->f_op != &uverbs_event_fops)
561 ev_file = filp->private_data;
562 if (ev_file->is_async) {
567 kref_get(&ev_file->ref);
574 static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
575 size_t count, loff_t *pos)
577 struct ib_uverbs_file *file = filp->private_data;
578 struct ib_uverbs_cmd_hdr hdr;
580 if (count < sizeof hdr)
583 if (copy_from_user(&hdr, buf, sizeof hdr))
586 if (hdr.in_words * 4 != count)
589 if (hdr.command < 0 ||
590 hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
591 !uverbs_cmd_table[hdr.command])
594 if (!file->ucontext &&
595 hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
598 if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
601 return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
602 hdr.in_words * 4, hdr.out_words * 4);
605 static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
607 struct ib_uverbs_file *file = filp->private_data;
612 return file->device->ib_dev->mmap(file->ucontext, vma);
616 * ib_uverbs_open() does not need the BKL:
618 * - the ib_uverbs_device structures are properly reference counted and
619 * everything else is purely local to the file being created, so
620 * races against other open calls are not a problem;
621 * - there is no ioctl method to race against;
622 * - the open method will either immediately run -ENXIO, or all
623 * required initialization will be done.
625 static int ib_uverbs_open(struct inode *inode, struct file *filp)
627 struct ib_uverbs_device *dev;
628 struct ib_uverbs_file *file;
631 dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev);
637 if (!try_module_get(dev->ib_dev->owner)) {
642 file = kmalloc(sizeof *file, GFP_KERNEL);
649 file->ucontext = NULL;
650 file->async_file = NULL;
651 kref_init(&file->ref);
652 mutex_init(&file->mutex);
654 filp->private_data = file;
659 module_put(dev->ib_dev->owner);
662 kref_put(&dev->ref, ib_uverbs_release_dev);
666 static int ib_uverbs_close(struct inode *inode, struct file *filp)
668 struct ib_uverbs_file *file = filp->private_data;
670 ib_uverbs_cleanup_ucontext(file, file->ucontext);
672 if (file->async_file)
673 kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
675 kref_put(&file->ref, ib_uverbs_release_file);
680 static const struct file_operations uverbs_fops = {
681 .owner = THIS_MODULE,
682 .write = ib_uverbs_write,
683 .open = ib_uverbs_open,
684 .release = ib_uverbs_close
687 static const struct file_operations uverbs_mmap_fops = {
688 .owner = THIS_MODULE,
689 .write = ib_uverbs_write,
690 .mmap = ib_uverbs_mmap,
691 .open = ib_uverbs_open,
692 .release = ib_uverbs_close
695 static struct ib_client uverbs_client = {
697 .add = ib_uverbs_add_one,
698 .remove = ib_uverbs_remove_one
701 static ssize_t show_ibdev(struct device *device, struct device_attribute *attr,
704 struct ib_uverbs_device *dev = dev_get_drvdata(device);
709 return sprintf(buf, "%s\n", dev->ib_dev->name);
711 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
713 static ssize_t show_dev_abi_version(struct device *device,
714 struct device_attribute *attr, char *buf)
716 struct ib_uverbs_device *dev = dev_get_drvdata(device);
721 return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
723 static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
725 static ssize_t show_abi_version(struct class *class, char *buf)
727 return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION);
729 static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
731 static dev_t overflow_maj;
732 static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES);
735 * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by
736 * requesting a new major number and doubling the number of max devices we
737 * support. It's stupid, but simple.
739 static int find_overflow_devnum(void)
744 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UVERBS_MAX_DEVICES,
747 printk(KERN_ERR "user_verbs: couldn't register dynamic device number\n");
752 ret = find_first_zero_bit(overflow_map, IB_UVERBS_MAX_DEVICES);
753 if (ret >= IB_UVERBS_MAX_DEVICES)
759 static void ib_uverbs_add_one(struct ib_device *device)
763 struct ib_uverbs_device *uverbs_dev;
765 if (!device->alloc_ucontext)
768 uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL);
772 kref_init(&uverbs_dev->ref);
773 init_completion(&uverbs_dev->comp);
775 spin_lock(&map_lock);
776 devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
777 if (devnum >= IB_UVERBS_MAX_DEVICES) {
778 spin_unlock(&map_lock);
779 devnum = find_overflow_devnum();
783 spin_lock(&map_lock);
784 uverbs_dev->devnum = devnum + IB_UVERBS_MAX_DEVICES;
785 base = devnum + overflow_maj;
786 set_bit(devnum, overflow_map);
788 uverbs_dev->devnum = devnum;
789 base = devnum + IB_UVERBS_BASE_DEV;
790 set_bit(devnum, dev_map);
792 spin_unlock(&map_lock);
794 uverbs_dev->ib_dev = device;
795 uverbs_dev->num_comp_vectors = device->num_comp_vectors;
797 cdev_init(&uverbs_dev->cdev, NULL);
798 uverbs_dev->cdev.owner = THIS_MODULE;
799 uverbs_dev->cdev.ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
800 kobject_set_name(&uverbs_dev->cdev.kobj, "uverbs%d", uverbs_dev->devnum);
801 if (cdev_add(&uverbs_dev->cdev, base, 1))
804 uverbs_dev->dev = device_create(uverbs_class, device->dma_device,
805 uverbs_dev->cdev.dev, uverbs_dev,
806 "uverbs%d", uverbs_dev->devnum);
807 if (IS_ERR(uverbs_dev->dev))
810 if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev))
812 if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version))
815 ib_set_client_data(device, &uverbs_client, uverbs_dev);
820 device_destroy(uverbs_class, uverbs_dev->cdev.dev);
823 cdev_del(&uverbs_dev->cdev);
824 if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES)
825 clear_bit(devnum, dev_map);
827 clear_bit(devnum, overflow_map);
830 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
831 wait_for_completion(&uverbs_dev->comp);
836 static void ib_uverbs_remove_one(struct ib_device *device)
838 struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client);
843 dev_set_drvdata(uverbs_dev->dev, NULL);
844 device_destroy(uverbs_class, uverbs_dev->cdev.dev);
845 cdev_del(&uverbs_dev->cdev);
847 if (uverbs_dev->devnum < IB_UVERBS_MAX_DEVICES)
848 clear_bit(uverbs_dev->devnum, dev_map);
850 clear_bit(uverbs_dev->devnum - IB_UVERBS_MAX_DEVICES, overflow_map);
852 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
853 wait_for_completion(&uverbs_dev->comp);
857 static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
858 const char *dev_name, void *data,
859 struct vfsmount *mnt)
861 return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
862 INFINIBANDEVENTFS_MAGIC, mnt);
865 static struct file_system_type uverbs_event_fs = {
866 /* No owner field so module can be unloaded */
867 .name = "infinibandeventfs",
868 .get_sb = uverbs_event_get_sb,
869 .kill_sb = kill_litter_super
872 static int __init ib_uverbs_init(void)
876 ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES,
879 printk(KERN_ERR "user_verbs: couldn't register device number\n");
883 uverbs_class = class_create(THIS_MODULE, "infiniband_verbs");
884 if (IS_ERR(uverbs_class)) {
885 ret = PTR_ERR(uverbs_class);
886 printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n");
890 ret = class_create_file(uverbs_class, &class_attr_abi_version);
892 printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
896 ret = register_filesystem(&uverbs_event_fs);
898 printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n");
902 uverbs_event_mnt = kern_mount(&uverbs_event_fs);
903 if (IS_ERR(uverbs_event_mnt)) {
904 ret = PTR_ERR(uverbs_event_mnt);
905 printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n");
909 ret = ib_register_client(&uverbs_client);
911 printk(KERN_ERR "user_verbs: couldn't register client\n");
918 mntput(uverbs_event_mnt);
921 unregister_filesystem(&uverbs_event_fs);
924 class_destroy(uverbs_class);
927 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
933 static void __exit ib_uverbs_cleanup(void)
935 ib_unregister_client(&uverbs_client);
936 mntput(uverbs_event_mnt);
937 unregister_filesystem(&uverbs_event_fs);
938 class_destroy(uverbs_class);
939 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
941 unregister_chrdev_region(overflow_maj, IB_UVERBS_MAX_DEVICES);
942 idr_destroy(&ib_uverbs_pd_idr);
943 idr_destroy(&ib_uverbs_mr_idr);
944 idr_destroy(&ib_uverbs_mw_idr);
945 idr_destroy(&ib_uverbs_ah_idr);
946 idr_destroy(&ib_uverbs_cq_idr);
947 idr_destroy(&ib_uverbs_qp_idr);
948 idr_destroy(&ib_uverbs_srq_idr);
951 module_init(ib_uverbs_init);
952 module_exit(ib_uverbs_cleanup);