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/device.h>
39 #include <linux/err.h>
41 #include <linux/poll.h>
42 #include <linux/file.h>
43 #include <linux/mount.h>
44 #include <linux/cdev.h>
46 #include <asm/uaccess.h>
50 MODULE_AUTHOR("Roland Dreier");
51 MODULE_DESCRIPTION("InfiniBand userspace verbs access");
52 MODULE_LICENSE("Dual BSD/GPL");
54 #define INFINIBANDEVENTFS_MAGIC 0x49426576 /* "IBev" */
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);
74 DEFINE_IDR(ib_uverbs_xrc_domain_idr);
76 static spinlock_t map_lock;
77 static struct ib_uverbs_device *dev_table[IB_UVERBS_MAX_DEVICES];
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_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel,
91 [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq,
92 [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq,
93 [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq,
94 [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq,
95 [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq,
96 [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp,
97 [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp,
98 [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
99 [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
100 [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send,
101 [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv,
102 [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv,
103 [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah,
104 [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah,
105 [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
106 [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
107 [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq,
108 [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq,
109 [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq,
110 [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
111 [IB_USER_VERBS_CMD_CREATE_XRC_SRQ] = ib_uverbs_create_xrc_srq,
112 [IB_USER_VERBS_CMD_OPEN_XRCD] = ib_uverbs_open_xrc_domain,
113 [IB_USER_VERBS_CMD_CLOSE_XRCD] = ib_uverbs_close_xrc_domain,
114 [IB_USER_VERBS_CMD_CREATE_XRC_RCV_QP] = ib_uverbs_create_xrc_rcv_qp,
115 [IB_USER_VERBS_CMD_MODIFY_XRC_RCV_QP] = ib_uverbs_modify_xrc_rcv_qp,
116 [IB_USER_VERBS_CMD_QUERY_XRC_RCV_QP] = ib_uverbs_query_xrc_rcv_qp,
117 [IB_USER_VERBS_CMD_REG_XRC_RCV_QP] = ib_uverbs_reg_xrc_rcv_qp,
118 [IB_USER_VERBS_CMD_UNREG_XRC_RCV_QP] = ib_uverbs_unreg_xrc_rcv_qp,
122 /* BSD Does not require a fake mountpoint for all files. */
123 static struct vfsmount *uverbs_event_mnt;
126 static void ib_uverbs_add_one(struct ib_device *device);
127 static void ib_uverbs_remove_one(struct ib_device *device);
129 static void ib_uverbs_release_dev(struct kref *ref)
131 struct ib_uverbs_device *dev =
132 container_of(ref, struct ib_uverbs_device, ref);
134 complete(&dev->comp);
137 static void ib_uverbs_release_event_file(struct kref *ref)
139 struct ib_uverbs_event_file *file =
140 container_of(ref, struct ib_uverbs_event_file, ref);
145 void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
146 struct ib_uverbs_event_file *ev_file,
147 struct ib_ucq_object *uobj)
149 struct ib_uverbs_event *evt, *tmp;
152 spin_lock_irq(&ev_file->lock);
153 list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
154 list_del(&evt->list);
157 spin_unlock_irq(&ev_file->lock);
159 kref_put(&ev_file->ref, ib_uverbs_release_event_file);
162 spin_lock_irq(&file->async_file->lock);
163 list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
164 list_del(&evt->list);
167 spin_unlock_irq(&file->async_file->lock);
170 void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
171 struct ib_uevent_object *uobj)
173 struct ib_uverbs_event *evt, *tmp;
175 spin_lock_irq(&file->async_file->lock);
176 list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
177 list_del(&evt->list);
180 spin_unlock_irq(&file->async_file->lock);
183 static void ib_uverbs_detach_umcast(struct ib_qp *qp,
184 struct ib_uqp_object *uobj)
186 struct ib_uverbs_mcast_entry *mcast, *tmp;
188 list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
189 ib_detach_mcast(qp, &mcast->gid, mcast->lid);
190 list_del(&mcast->list);
195 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
196 struct ib_ucontext *context)
198 struct ib_uobject *uobj, *tmp;
203 context->closing = 1;
205 list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
206 struct ib_ah *ah = uobj->object;
208 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
213 list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
214 struct ib_qp *qp = uobj->object;
215 struct ib_uqp_object *uqp =
216 container_of(uobj, struct ib_uqp_object, uevent.uobject);
218 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
219 ib_uverbs_detach_umcast(qp, uqp);
221 ib_uverbs_release_uevent(file, &uqp->uevent);
226 list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
227 struct ib_srq *srq = uobj->object;
228 struct ib_uevent_object *uevent =
229 container_of(uobj, struct ib_uevent_object, uobject);
231 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
233 ib_uverbs_release_uevent(file, uevent);
237 list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
238 struct ib_cq *cq = uobj->object;
239 struct ib_uverbs_event_file *ev_file = cq->cq_context;
240 struct ib_ucq_object *ucq =
241 container_of(uobj, struct ib_ucq_object, uobject);
243 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
245 ib_uverbs_release_ucq(file, ev_file, ucq);
251 list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
252 struct ib_mr *mr = uobj->object;
254 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
259 mutex_lock(&file->device->ib_dev->xrcd_table_mutex);
260 list_for_each_entry_safe(uobj, tmp, &context->xrcd_list, list) {
261 struct ib_xrcd *xrcd = uobj->object;
262 struct ib_uxrc_rcv_object *xrc_qp_obj, *tmp1;
263 struct ib_uxrcd_object *xrcd_uobj =
264 container_of(uobj, struct ib_uxrcd_object, uobject);
266 list_for_each_entry_safe(xrc_qp_obj, tmp1,
267 &xrcd_uobj->xrc_reg_qp_list, list) {
268 list_del(&xrc_qp_obj->list);
269 ib_uverbs_cleanup_xrc_rcv_qp(file, xrcd,
274 idr_remove_uobj(&ib_uverbs_xrc_domain_idr, uobj);
275 ib_uverbs_dealloc_xrcd(file->device->ib_dev, xrcd);
278 mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
280 list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
281 struct ib_pd *pd = uobj->object;
283 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
288 return context->device->dealloc_ucontext(context);
291 static void ib_uverbs_release_file(struct kref *ref)
293 struct ib_uverbs_file *file =
294 container_of(ref, struct ib_uverbs_file, ref);
296 module_put(file->device->ib_dev->owner);
297 kref_put(&file->device->ref, ib_uverbs_release_dev);
302 static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
303 size_t count, loff_t *pos)
305 struct ib_uverbs_event_file *file = filp->private_data;
306 struct ib_uverbs_event *event;
310 spin_lock_irq(&file->lock);
312 while (list_empty(&file->event_list)) {
313 spin_unlock_irq(&file->lock);
315 if (filp->f_flags & O_NONBLOCK)
318 if (wait_event_interruptible(file->poll_wait,
319 !list_empty(&file->event_list)))
322 spin_lock_irq(&file->lock);
325 event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
328 eventsz = sizeof (struct ib_uverbs_async_event_desc);
330 eventsz = sizeof (struct ib_uverbs_comp_event_desc);
332 if (eventsz > count) {
336 list_del(file->event_list.next);
337 if (event->counter) {
339 list_del(&event->obj_list);
343 spin_unlock_irq(&file->lock);
346 if (copy_to_user(buf, event, eventsz))
357 static unsigned int ib_uverbs_event_poll(struct file *filp,
358 struct poll_table_struct *wait)
360 unsigned int pollflags = 0;
361 struct ib_uverbs_event_file *file = filp->private_data;
364 poll_wait(filp, &file->poll_wait, wait);
366 spin_lock_irq(&file->lock);
367 if (!list_empty(&file->event_list))
368 pollflags = POLLIN | POLLRDNORM;
369 spin_unlock_irq(&file->lock);
374 static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
376 struct ib_uverbs_event_file *file = filp->private_data;
378 return fasync_helper(fd, filp, on, &file->async_queue);
381 static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
383 struct ib_uverbs_event_file *file = filp->private_data;
384 struct ib_uverbs_event *entry, *tmp;
386 spin_lock_irq(&file->lock);
388 list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
390 list_del(&entry->obj_list);
393 spin_unlock_irq(&file->lock);
395 if (file->is_async) {
396 ib_unregister_event_handler(&file->uverbs_file->event_handler);
397 kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
399 kref_put(&file->ref, ib_uverbs_release_event_file);
404 static const struct file_operations uverbs_event_fops = {
405 .owner = THIS_MODULE,
406 .read = ib_uverbs_event_read,
407 .poll = ib_uverbs_event_poll,
408 .release = ib_uverbs_event_close,
409 .fasync = ib_uverbs_event_fasync
412 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
414 struct ib_uverbs_event_file *file = cq_context;
415 struct ib_ucq_object *uobj;
416 struct ib_uverbs_event *entry;
422 spin_lock_irqsave(&file->lock, flags);
423 if (file->is_closed) {
424 spin_unlock_irqrestore(&file->lock, flags);
428 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
430 spin_unlock_irqrestore(&file->lock, flags);
434 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
436 entry->desc.comp.cq_handle = cq->uobject->user_handle;
437 entry->counter = &uobj->comp_events_reported;
439 list_add_tail(&entry->list, &file->event_list);
440 list_add_tail(&entry->obj_list, &uobj->comp_list);
441 spin_unlock_irqrestore(&file->lock, flags);
443 wake_up_interruptible(&file->poll_wait);
445 selwakeup(&file->filp->f_selinfo);
446 kill_fasync(&file->async_queue, SIGIO, POLL_IN);
449 static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
450 __u64 element, __u64 event,
451 struct list_head *obj_list,
454 struct ib_uverbs_event *entry;
457 spin_lock_irqsave(&file->async_file->lock, flags);
458 if (file->async_file->is_closed) {
459 spin_unlock_irqrestore(&file->async_file->lock, flags);
463 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
465 spin_unlock_irqrestore(&file->async_file->lock, flags);
469 entry->desc.async.element = element;
470 entry->desc.async.event_type = event;
471 entry->counter = counter;
473 list_add_tail(&entry->list, &file->async_file->event_list);
475 list_add_tail(&entry->obj_list, obj_list);
476 spin_unlock_irqrestore(&file->async_file->lock, flags);
478 wake_up_interruptible(&file->async_file->poll_wait);
479 if (file->async_file->filp)
480 selwakeup(&file->async_file->filp->f_selinfo);
481 kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
484 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
486 struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
487 struct ib_ucq_object, uobject);
489 ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle,
490 event->event, &uobj->async_list,
491 &uobj->async_events_reported);
494 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
496 struct ib_uevent_object *uobj;
498 uobj = container_of(event->element.qp->uobject,
499 struct ib_uevent_object, uobject);
501 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
502 event->event, &uobj->event_list,
503 &uobj->events_reported);
506 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
508 struct ib_uevent_object *uobj;
510 uobj = container_of(event->element.srq->uobject,
511 struct ib_uevent_object, uobject);
513 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
514 event->event, &uobj->event_list,
515 &uobj->events_reported);
518 void ib_uverbs_event_handler(struct ib_event_handler *handler,
519 struct ib_event *event)
521 struct ib_uverbs_file *file =
522 container_of(handler, struct ib_uverbs_file, event_handler);
524 ib_uverbs_async_handler(file, event->element.port_num, event->event,
528 void ib_uverbs_xrc_rcv_qp_event_handler(struct ib_event *event,
531 ib_uverbs_async_handler(context_ptr, event->element.xrc_qp_num,
532 event->event, NULL, NULL);
535 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
536 int is_async, int *fd)
538 struct ib_uverbs_event_file *ev_file;
542 ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
544 return ERR_PTR(-ENOMEM);
546 kref_init(&ev_file->ref);
547 spin_lock_init(&ev_file->lock);
548 INIT_LIST_HEAD(&ev_file->event_list);
549 init_waitqueue_head(&ev_file->poll_wait);
550 ev_file->uverbs_file = uverbs_file;
551 ev_file->async_queue = NULL;
552 ev_file->is_async = is_async;
553 ev_file->is_closed = 0;
554 ev_file->filp = NULL;
556 *fd = get_unused_fd();
563 * fops_get() can't fail here, because we're coming from a
564 * system call on a uverbs file, which will already have a
568 filp = alloc_file(uverbs_event_mnt, dget(uverbs_event_mnt->mnt_root),
569 FMODE_READ, fops_get(&uverbs_event_fops));
571 filp = alloc_file(FMODE_READ, fops_get(&uverbs_event_fops));
578 filp->private_data = ev_file;
591 * Look up a completion event file by FD. If lookup is successful,
592 * takes a ref to the event file struct that it returns; if
593 * unsuccessful, returns NULL.
595 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
597 struct ib_uverbs_event_file *ev_file = NULL;
604 if (filp->f_op != &uverbs_event_fops)
607 ev_file = filp->private_data;
608 if (ev_file->is_async) {
613 kref_get(&ev_file->ref);
620 static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
621 size_t count, loff_t *pos)
623 struct ib_uverbs_file *file = filp->private_data;
624 struct ib_uverbs_cmd_hdr hdr;
626 if (count < sizeof hdr)
629 if (copy_from_user(&hdr, buf, sizeof hdr))
632 if (hdr.in_words * 4 != count)
635 if (hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
636 !uverbs_cmd_table[hdr.command] ||
637 !(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
640 if (!file->ucontext &&
641 hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
644 return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
645 hdr.in_words * 4, hdr.out_words * 4);
648 static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
650 struct ib_uverbs_file *file = filp->private_data;
655 return file->device->ib_dev->mmap(file->ucontext, vma);
659 * ib_uverbs_open() does not need the BKL:
661 * - dev_table[] accesses are protected by map_lock, the
662 * ib_uverbs_device structures are properly reference counted, and
663 * everything else is purely local to the file being created, so
664 * races against other open calls are not a problem;
665 * - there is no ioctl method to race against;
666 * - the device is added to dev_table[] as the last part of module
667 * initialization, the open method will either immediately run
668 * -ENXIO, or all required initialization will be done.
670 static int ib_uverbs_open(struct inode *inode, struct file *filp)
672 struct ib_uverbs_device *dev;
673 struct ib_uverbs_file *file;
676 spin_lock(&map_lock);
677 dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR];
680 spin_unlock(&map_lock);
685 if (!try_module_get(dev->ib_dev->owner)) {
690 file = kmalloc(sizeof *file, GFP_KERNEL);
697 file->ucontext = NULL;
698 file->async_file = NULL;
699 kref_init(&file->ref);
700 mutex_init(&file->mutex);
702 filp->private_data = file;
707 module_put(dev->ib_dev->owner);
710 kref_put(&dev->ref, ib_uverbs_release_dev);
714 static int ib_uverbs_close(struct inode *inode, struct file *filp)
716 struct ib_uverbs_file *file = filp->private_data;
718 ib_uverbs_cleanup_ucontext(file, file->ucontext);
720 if (file->async_file)
721 kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
723 kref_put(&file->ref, ib_uverbs_release_file);
728 static const struct file_operations uverbs_fops = {
729 .owner = THIS_MODULE,
730 .write = ib_uverbs_write,
731 .open = ib_uverbs_open,
732 .release = ib_uverbs_close
735 static const struct file_operations uverbs_mmap_fops = {
736 .owner = THIS_MODULE,
737 .write = ib_uverbs_write,
738 .mmap = ib_uverbs_mmap,
739 .open = ib_uverbs_open,
740 .release = ib_uverbs_close
743 static struct ib_client uverbs_client = {
745 .add = ib_uverbs_add_one,
746 .remove = ib_uverbs_remove_one
749 static ssize_t show_ibdev(struct device *device, struct device_attribute *attr,
752 struct ib_uverbs_device *dev = dev_get_drvdata(device);
757 return sprintf(buf, "%s\n", dev->ib_dev->name);
759 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
761 static ssize_t show_dev_abi_version(struct device *device,
762 struct device_attribute *attr, char *buf)
764 struct ib_uverbs_device *dev = dev_get_drvdata(device);
769 return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
771 static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
773 static ssize_t show_abi_version(struct class *class, struct class_attribute *attr, char *buf)
775 return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION);
777 static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
779 #include <linux/pci.h>
782 show_dev_device(struct device *device, struct device_attribute *attr, char *buf)
784 struct ib_uverbs_device *dev = dev_get_drvdata(device);
789 return sprintf(buf, "0x%04x\n",
790 ((struct pci_dev *)dev->ib_dev->dma_device)->device);
792 static DEVICE_ATTR(device, S_IRUGO, show_dev_device, NULL);
795 show_dev_vendor(struct device *device, struct device_attribute *attr, char *buf)
797 struct ib_uverbs_device *dev = dev_get_drvdata(device);
802 return sprintf(buf, "0x%04x\n",
803 ((struct pci_dev *)dev->ib_dev->dma_device)->vendor);
805 static DEVICE_ATTR(vendor, S_IRUGO, show_dev_vendor, NULL);
807 struct attribute *device_attrs[] =
809 &dev_attr_device.attr,
810 &dev_attr_vendor.attr,
814 static struct attribute_group device_group = {
816 .attrs = device_attrs
819 static void ib_uverbs_add_one(struct ib_device *device)
821 struct ib_uverbs_device *uverbs_dev;
823 if (!device->alloc_ucontext)
826 uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL);
830 kref_init(&uverbs_dev->ref);
831 init_completion(&uverbs_dev->comp);
833 spin_lock(&map_lock);
834 uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
835 if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) {
836 spin_unlock(&map_lock);
839 set_bit(uverbs_dev->devnum, dev_map);
840 spin_unlock(&map_lock);
842 uverbs_dev->ib_dev = device;
843 uverbs_dev->num_comp_vectors = device->num_comp_vectors;
845 uverbs_dev->cdev = cdev_alloc();
846 if (!uverbs_dev->cdev)
848 uverbs_dev->cdev->owner = THIS_MODULE;
849 uverbs_dev->cdev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
850 kobject_set_name(&uverbs_dev->cdev->kobj, "uverbs%d", uverbs_dev->devnum);
851 if (cdev_add(uverbs_dev->cdev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1))
854 uverbs_dev->dev = device_create(uverbs_class, device->dma_device,
855 uverbs_dev->cdev->dev, uverbs_dev,
856 "uverbs%d", uverbs_dev->devnum);
857 if (IS_ERR(uverbs_dev->dev))
860 if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev))
862 if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version))
864 if (sysfs_create_group(&uverbs_dev->dev->kobj, &device_group))
867 spin_lock(&map_lock);
868 dev_table[uverbs_dev->devnum] = uverbs_dev;
869 spin_unlock(&map_lock);
871 ib_set_client_data(device, &uverbs_client, uverbs_dev);
876 device_destroy(uverbs_class, uverbs_dev->cdev->dev);
879 cdev_del(uverbs_dev->cdev);
880 clear_bit(uverbs_dev->devnum, dev_map);
883 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
884 wait_for_completion(&uverbs_dev->comp);
889 static void ib_uverbs_remove_one(struct ib_device *device)
891 struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client);
896 sysfs_remove_group(&uverbs_dev->dev->kobj, &device_group);
897 dev_set_drvdata(uverbs_dev->dev, NULL);
898 device_destroy(uverbs_class, uverbs_dev->cdev->dev);
899 cdev_del(uverbs_dev->cdev);
901 spin_lock(&map_lock);
902 dev_table[uverbs_dev->devnum] = NULL;
903 spin_unlock(&map_lock);
905 clear_bit(uverbs_dev->devnum, dev_map);
907 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
908 wait_for_completion(&uverbs_dev->comp);
912 static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
913 const char *dev_name, void *data,
914 struct vfsmount *mnt)
916 return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
917 INFINIBANDEVENTFS_MAGIC, mnt);
920 static struct file_system_type uverbs_event_fs = {
921 /* No owner field so module can be unloaded */
922 .name = "infinibandeventfs",
923 .get_sb = uverbs_event_get_sb,
924 .kill_sb = kill_litter_super
928 static int __init ib_uverbs_init(void)
932 spin_lock_init(&map_lock);
934 ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES,
937 printk(KERN_ERR "user_verbs: couldn't register device number\n");
941 uverbs_class = class_create(THIS_MODULE, "infiniband_verbs");
942 if (IS_ERR(uverbs_class)) {
943 ret = PTR_ERR(uverbs_class);
944 printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n");
948 ret = class_create_file(uverbs_class, &class_attr_abi_version);
950 printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
955 ret = register_filesystem(&uverbs_event_fs);
957 printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n");
961 uverbs_event_mnt = kern_mount(&uverbs_event_fs);
962 if (IS_ERR(uverbs_event_mnt)) {
963 ret = PTR_ERR(uverbs_event_mnt);
964 printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n");
969 ret = ib_register_client(&uverbs_client);
971 printk(KERN_ERR "user_verbs: couldn't register client\n");
979 mntput(uverbs_event_mnt);
982 unregister_filesystem(&uverbs_event_fs);
986 class_destroy(uverbs_class);
989 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
995 static void __exit ib_uverbs_cleanup(void)
997 ib_unregister_client(&uverbs_client);
999 mntput(uverbs_event_mnt);
1000 unregister_filesystem(&uverbs_event_fs);
1002 class_destroy(uverbs_class);
1003 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
1004 idr_destroy(&ib_uverbs_pd_idr);
1005 idr_destroy(&ib_uverbs_mr_idr);
1006 idr_destroy(&ib_uverbs_mw_idr);
1007 idr_destroy(&ib_uverbs_ah_idr);
1008 idr_destroy(&ib_uverbs_cq_idr);
1009 idr_destroy(&ib_uverbs_qp_idr);
1010 idr_destroy(&ib_uverbs_srq_idr);
1013 module_init(ib_uverbs_init);
1014 module_exit(ib_uverbs_cleanup);