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>
47 #include <linux/slab.h>
49 #include <asm/uaccess.h>
53 MODULE_AUTHOR("Roland Dreier");
54 MODULE_DESCRIPTION("InfiniBand userspace verbs access");
55 MODULE_LICENSE("Dual BSD/GPL");
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);
75 DEFINE_IDR(ib_uverbs_xrcd_idr);
77 static DEFINE_SPINLOCK(map_lock);
78 static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
80 static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
81 const char __user *buf, int in_len,
83 [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context,
84 [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device,
85 [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port,
86 [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
87 [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
88 [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
89 [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
90 [IB_USER_VERBS_CMD_ALLOC_MW] = ib_uverbs_alloc_mw,
91 [IB_USER_VERBS_CMD_DEALLOC_MW] = ib_uverbs_dealloc_mw,
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,
113 [IB_USER_VERBS_CMD_OPEN_XRCD] = ib_uverbs_open_xrcd,
114 [IB_USER_VERBS_CMD_CLOSE_XRCD] = ib_uverbs_close_xrcd,
115 [IB_USER_VERBS_CMD_CREATE_XSRQ] = ib_uverbs_create_xsrq,
116 [IB_USER_VERBS_CMD_OPEN_QP] = ib_uverbs_open_qp
119 static void ib_uverbs_add_one(struct ib_device *device);
120 static void ib_uverbs_remove_one(struct ib_device *device);
122 static void ib_uverbs_release_dev(struct kref *ref)
124 struct ib_uverbs_device *dev =
125 container_of(ref, struct ib_uverbs_device, ref);
127 complete(&dev->comp);
130 static void ib_uverbs_release_event_file(struct kref *ref)
132 struct ib_uverbs_event_file *file =
133 container_of(ref, struct ib_uverbs_event_file, ref);
138 void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
139 struct ib_uverbs_event_file *ev_file,
140 struct ib_ucq_object *uobj)
142 struct ib_uverbs_event *evt, *tmp;
145 spin_lock_irq(&ev_file->lock);
146 list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
147 list_del(&evt->list);
150 spin_unlock_irq(&ev_file->lock);
152 kref_put(&ev_file->ref, ib_uverbs_release_event_file);
155 spin_lock_irq(&file->async_file->lock);
156 list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
157 list_del(&evt->list);
160 spin_unlock_irq(&file->async_file->lock);
163 void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
164 struct ib_uevent_object *uobj)
166 struct ib_uverbs_event *evt, *tmp;
168 spin_lock_irq(&file->async_file->lock);
169 list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
170 list_del(&evt->list);
173 spin_unlock_irq(&file->async_file->lock);
176 static void ib_uverbs_detach_umcast(struct ib_qp *qp,
177 struct ib_uqp_object *uobj)
179 struct ib_uverbs_mcast_entry *mcast, *tmp;
181 list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
182 ib_detach_mcast(qp, &mcast->gid, mcast->lid);
183 list_del(&mcast->list);
188 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
189 struct ib_ucontext *context)
191 struct ib_uobject *uobj, *tmp;
196 context->closing = 1;
198 list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
199 struct ib_ah *ah = uobj->object;
201 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
206 /* Remove MWs before QPs, in order to support type 2A MWs. */
207 list_for_each_entry_safe(uobj, tmp, &context->mw_list, list) {
208 struct ib_mw *mw = uobj->object;
210 idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
215 list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
216 struct ib_qp *qp = uobj->object;
217 struct ib_uqp_object *uqp =
218 container_of(uobj, struct ib_uqp_object, uevent.uobject);
220 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
221 if (qp != qp->real_qp) {
224 ib_uverbs_detach_umcast(qp, uqp);
227 ib_uverbs_release_uevent(file, &uqp->uevent);
231 list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
232 struct ib_cq *cq = uobj->object;
233 struct ib_uverbs_event_file *ev_file = cq->cq_context;
234 struct ib_ucq_object *ucq =
235 container_of(uobj, struct ib_ucq_object, uobject);
237 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
239 ib_uverbs_release_ucq(file, ev_file, ucq);
243 list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
244 struct ib_srq *srq = uobj->object;
245 struct ib_uevent_object *uevent =
246 container_of(uobj, struct ib_uevent_object, uobject);
248 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
250 ib_uverbs_release_uevent(file, uevent);
254 list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
255 struct ib_mr *mr = uobj->object;
257 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
262 mutex_lock(&file->device->xrcd_tree_mutex);
263 list_for_each_entry_safe(uobj, tmp, &context->xrcd_list, list) {
264 struct ib_xrcd *xrcd = uobj->object;
265 struct ib_uxrcd_object *uxrcd =
266 container_of(uobj, struct ib_uxrcd_object, uobject);
268 idr_remove_uobj(&ib_uverbs_xrcd_idr, uobj);
269 ib_uverbs_dealloc_xrcd(file->device, xrcd);
272 mutex_unlock(&file->device->xrcd_tree_mutex);
274 list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
275 struct ib_pd *pd = uobj->object;
277 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
282 return context->device->dealloc_ucontext(context);
285 static void ib_uverbs_release_file(struct kref *ref)
287 struct ib_uverbs_file *file =
288 container_of(ref, struct ib_uverbs_file, ref);
290 module_put(file->device->ib_dev->owner);
291 kref_put(&file->device->ref, ib_uverbs_release_dev);
296 static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
297 size_t count, loff_t *pos)
299 struct ib_uverbs_event_file *file = filp->private_data;
300 struct ib_uverbs_event *event;
304 spin_lock_irq(&file->lock);
306 while (list_empty(&file->event_list)) {
307 spin_unlock_irq(&file->lock);
309 if (filp->f_flags & O_NONBLOCK)
312 if (wait_event_interruptible(file->poll_wait,
313 !list_empty(&file->event_list)))
316 spin_lock_irq(&file->lock);
319 event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
322 eventsz = sizeof (struct ib_uverbs_async_event_desc);
324 eventsz = sizeof (struct ib_uverbs_comp_event_desc);
326 if (eventsz > count) {
330 list_del(file->event_list.next);
331 if (event->counter) {
333 list_del(&event->obj_list);
337 spin_unlock_irq(&file->lock);
340 if (copy_to_user(buf, event, eventsz))
351 static unsigned int ib_uverbs_event_poll(struct file *filp,
352 struct poll_table_struct *wait)
354 unsigned int pollflags = 0;
355 struct ib_uverbs_event_file *file = filp->private_data;
357 poll_wait(filp, &file->poll_wait, wait);
359 spin_lock_irq(&file->lock);
360 if (!list_empty(&file->event_list))
361 pollflags = POLLIN | POLLRDNORM;
362 spin_unlock_irq(&file->lock);
367 static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
369 struct ib_uverbs_event_file *file = filp->private_data;
371 return fasync_helper(fd, filp, on, &file->async_queue);
374 static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
376 struct ib_uverbs_event_file *file = filp->private_data;
377 struct ib_uverbs_event *entry, *tmp;
379 spin_lock_irq(&file->lock);
381 list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
383 list_del(&entry->obj_list);
386 spin_unlock_irq(&file->lock);
388 if (file->is_async) {
389 ib_unregister_event_handler(&file->uverbs_file->event_handler);
390 kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
392 kref_put(&file->ref, ib_uverbs_release_event_file);
397 static const struct file_operations uverbs_event_fops = {
398 .owner = THIS_MODULE,
399 .read = ib_uverbs_event_read,
400 .poll = ib_uverbs_event_poll,
401 .release = ib_uverbs_event_close,
402 .fasync = ib_uverbs_event_fasync,
406 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
408 struct ib_uverbs_event_file *file = cq_context;
409 struct ib_ucq_object *uobj;
410 struct ib_uverbs_event *entry;
416 spin_lock_irqsave(&file->lock, flags);
417 if (file->is_closed) {
418 spin_unlock_irqrestore(&file->lock, flags);
422 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
424 spin_unlock_irqrestore(&file->lock, flags);
428 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
430 entry->desc.comp.cq_handle = cq->uobject->user_handle;
431 entry->counter = &uobj->comp_events_reported;
433 list_add_tail(&entry->list, &file->event_list);
434 list_add_tail(&entry->obj_list, &uobj->comp_list);
435 spin_unlock_irqrestore(&file->lock, flags);
437 wake_up_interruptible(&file->poll_wait);
438 kill_fasync(&file->async_queue, SIGIO, POLL_IN);
441 static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
442 __u64 element, __u64 event,
443 struct list_head *obj_list,
446 struct ib_uverbs_event *entry;
449 spin_lock_irqsave(&file->async_file->lock, flags);
450 if (file->async_file->is_closed) {
451 spin_unlock_irqrestore(&file->async_file->lock, flags);
455 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
457 spin_unlock_irqrestore(&file->async_file->lock, flags);
461 entry->desc.async.element = element;
462 entry->desc.async.event_type = event;
463 entry->counter = counter;
465 list_add_tail(&entry->list, &file->async_file->event_list);
467 list_add_tail(&entry->obj_list, obj_list);
468 spin_unlock_irqrestore(&file->async_file->lock, flags);
470 wake_up_interruptible(&file->async_file->poll_wait);
471 kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
474 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
476 struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
477 struct ib_ucq_object, uobject);
479 ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle,
480 event->event, &uobj->async_list,
481 &uobj->async_events_reported);
484 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
486 struct ib_uevent_object *uobj;
488 uobj = container_of(event->element.qp->uobject,
489 struct ib_uevent_object, uobject);
491 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
492 event->event, &uobj->event_list,
493 &uobj->events_reported);
496 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
498 struct ib_uevent_object *uobj;
500 uobj = container_of(event->element.srq->uobject,
501 struct ib_uevent_object, uobject);
503 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
504 event->event, &uobj->event_list,
505 &uobj->events_reported);
508 void ib_uverbs_event_handler(struct ib_event_handler *handler,
509 struct ib_event *event)
511 struct ib_uverbs_file *file =
512 container_of(handler, struct ib_uverbs_file, event_handler);
514 ib_uverbs_async_handler(file, event->element.port_num, event->event,
518 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
521 struct ib_uverbs_event_file *ev_file;
524 ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
526 return ERR_PTR(-ENOMEM);
528 kref_init(&ev_file->ref);
529 spin_lock_init(&ev_file->lock);
530 INIT_LIST_HEAD(&ev_file->event_list);
531 init_waitqueue_head(&ev_file->poll_wait);
532 ev_file->uverbs_file = uverbs_file;
533 ev_file->async_queue = NULL;
534 ev_file->is_async = is_async;
535 ev_file->is_closed = 0;
537 filp = anon_inode_getfile("[infinibandevent]", &uverbs_event_fops,
546 * Look up a completion event file by FD. If lookup is successful,
547 * takes a ref to the event file struct that it returns; if
548 * unsuccessful, returns NULL.
550 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
552 struct ib_uverbs_event_file *ev_file = NULL;
553 struct fd f = fdget(fd);
558 if (f.file->f_op != &uverbs_event_fops)
561 ev_file = f.file->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 >= ARRAY_SIZE(uverbs_cmd_table) ||
590 !uverbs_cmd_table[hdr.command])
593 if (!file->ucontext &&
594 hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
597 if (!(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
600 return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
601 hdr.in_words * 4, hdr.out_words * 4);
604 static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
606 struct ib_uverbs_file *file = filp->private_data;
611 return file->device->ib_dev->mmap(file->ucontext, vma);
615 * ib_uverbs_open() does not need the BKL:
617 * - the ib_uverbs_device structures are properly reference counted and
618 * everything else is purely local to the file being created, so
619 * races against other open calls are not a problem;
620 * - there is no ioctl method to race against;
621 * - the open method will either immediately run -ENXIO, or all
622 * required initialization will be done.
624 static int ib_uverbs_open(struct inode *inode, struct file *filp)
626 struct ib_uverbs_device *dev;
627 struct ib_uverbs_file *file;
630 dev = container_of(inode->i_cdev, struct ib_uverbs_device, cdev);
636 if (!try_module_get(dev->ib_dev->owner)) {
641 file = kmalloc(sizeof *file, GFP_KERNEL);
648 file->ucontext = NULL;
649 file->async_file = NULL;
650 kref_init(&file->ref);
651 mutex_init(&file->mutex);
653 filp->private_data = file;
655 return nonseekable_open(inode, filp);
658 module_put(dev->ib_dev->owner);
661 kref_put(&dev->ref, ib_uverbs_release_dev);
665 static int ib_uverbs_close(struct inode *inode, struct file *filp)
667 struct ib_uverbs_file *file = filp->private_data;
669 ib_uverbs_cleanup_ucontext(file, file->ucontext);
671 if (file->async_file)
672 kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
674 kref_put(&file->ref, ib_uverbs_release_file);
679 static const struct file_operations uverbs_fops = {
680 .owner = THIS_MODULE,
681 .write = ib_uverbs_write,
682 .open = ib_uverbs_open,
683 .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,
696 static struct ib_client uverbs_client = {
698 .add = ib_uverbs_add_one,
699 .remove = ib_uverbs_remove_one
702 static ssize_t show_ibdev(struct device *device, struct device_attribute *attr,
705 struct ib_uverbs_device *dev = dev_get_drvdata(device);
710 return sprintf(buf, "%s\n", dev->ib_dev->name);
712 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
714 static ssize_t show_dev_abi_version(struct device *device,
715 struct device_attribute *attr, char *buf)
717 struct ib_uverbs_device *dev = dev_get_drvdata(device);
722 return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
724 static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
726 static CLASS_ATTR_STRING(abi_version, S_IRUGO,
727 __stringify(IB_USER_VERBS_ABI_VERSION));
729 static dev_t overflow_maj;
730 static DECLARE_BITMAP(overflow_map, IB_UVERBS_MAX_DEVICES);
733 * If we have more than IB_UVERBS_MAX_DEVICES, dynamically overflow by
734 * requesting a new major number and doubling the number of max devices we
735 * support. It's stupid, but simple.
737 static int find_overflow_devnum(void)
742 ret = alloc_chrdev_region(&overflow_maj, 0, IB_UVERBS_MAX_DEVICES,
745 printk(KERN_ERR "user_verbs: couldn't register dynamic device number\n");
750 ret = find_first_zero_bit(overflow_map, IB_UVERBS_MAX_DEVICES);
751 if (ret >= IB_UVERBS_MAX_DEVICES)
757 static void ib_uverbs_add_one(struct ib_device *device)
761 struct ib_uverbs_device *uverbs_dev;
763 if (!device->alloc_ucontext)
766 uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL);
770 kref_init(&uverbs_dev->ref);
771 init_completion(&uverbs_dev->comp);
772 uverbs_dev->xrcd_tree = RB_ROOT;
773 mutex_init(&uverbs_dev->xrcd_tree_mutex);
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 char *uverbs_devnode(struct device *dev, umode_t *mode)
861 return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
864 static int __init ib_uverbs_init(void)
868 ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES,
871 printk(KERN_ERR "user_verbs: couldn't register device number\n");
875 uverbs_class = class_create(THIS_MODULE, "infiniband_verbs");
876 if (IS_ERR(uverbs_class)) {
877 ret = PTR_ERR(uverbs_class);
878 printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n");
882 uverbs_class->devnode = uverbs_devnode;
884 ret = class_create_file(uverbs_class, &class_attr_abi_version.attr);
886 printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
890 ret = ib_register_client(&uverbs_client);
892 printk(KERN_ERR "user_verbs: couldn't register client\n");
899 class_destroy(uverbs_class);
902 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
908 static void __exit ib_uverbs_cleanup(void)
910 ib_unregister_client(&uverbs_client);
911 class_destroy(uverbs_class);
912 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
914 unregister_chrdev_region(overflow_maj, IB_UVERBS_MAX_DEVICES);
915 idr_destroy(&ib_uverbs_pd_idr);
916 idr_destroy(&ib_uverbs_mr_idr);
917 idr_destroy(&ib_uverbs_mw_idr);
918 idr_destroy(&ib_uverbs_ah_idr);
919 idr_destroy(&ib_uverbs_cq_idr);
920 idr_destroy(&ib_uverbs_qp_idr);
921 idr_destroy(&ib_uverbs_srq_idr);
924 module_init(ib_uverbs_init);
925 module_exit(ib_uverbs_cleanup);