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/file.h>
44 #include <linux/mount.h>
45 #include <linux/cdev.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);
75 DEFINE_IDR(ib_uverbs_xrc_domain_idr);
77 static spinlock_t map_lock;
78 static struct ib_uverbs_device *dev_table[IB_UVERBS_MAX_DEVICES];
79 static DECLARE_BITMAP(dev_map, IB_UVERBS_MAX_DEVICES);
81 static ssize_t (*uverbs_cmd_table[])(struct ib_uverbs_file *file,
82 const char __user *buf, int in_len,
84 [IB_USER_VERBS_CMD_GET_CONTEXT] = ib_uverbs_get_context,
85 [IB_USER_VERBS_CMD_QUERY_DEVICE] = ib_uverbs_query_device,
86 [IB_USER_VERBS_CMD_QUERY_PORT] = ib_uverbs_query_port,
87 [IB_USER_VERBS_CMD_ALLOC_PD] = ib_uverbs_alloc_pd,
88 [IB_USER_VERBS_CMD_DEALLOC_PD] = ib_uverbs_dealloc_pd,
89 [IB_USER_VERBS_CMD_REG_MR] = ib_uverbs_reg_mr,
90 [IB_USER_VERBS_CMD_DEREG_MR] = ib_uverbs_dereg_mr,
91 [IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL] = ib_uverbs_create_comp_channel,
92 [IB_USER_VERBS_CMD_CREATE_CQ] = ib_uverbs_create_cq,
93 [IB_USER_VERBS_CMD_RESIZE_CQ] = ib_uverbs_resize_cq,
94 [IB_USER_VERBS_CMD_POLL_CQ] = ib_uverbs_poll_cq,
95 [IB_USER_VERBS_CMD_REQ_NOTIFY_CQ] = ib_uverbs_req_notify_cq,
96 [IB_USER_VERBS_CMD_DESTROY_CQ] = ib_uverbs_destroy_cq,
97 [IB_USER_VERBS_CMD_CREATE_QP] = ib_uverbs_create_qp,
98 [IB_USER_VERBS_CMD_QUERY_QP] = ib_uverbs_query_qp,
99 [IB_USER_VERBS_CMD_MODIFY_QP] = ib_uverbs_modify_qp,
100 [IB_USER_VERBS_CMD_DESTROY_QP] = ib_uverbs_destroy_qp,
101 [IB_USER_VERBS_CMD_POST_SEND] = ib_uverbs_post_send,
102 [IB_USER_VERBS_CMD_POST_RECV] = ib_uverbs_post_recv,
103 [IB_USER_VERBS_CMD_POST_SRQ_RECV] = ib_uverbs_post_srq_recv,
104 [IB_USER_VERBS_CMD_CREATE_AH] = ib_uverbs_create_ah,
105 [IB_USER_VERBS_CMD_DESTROY_AH] = ib_uverbs_destroy_ah,
106 [IB_USER_VERBS_CMD_ATTACH_MCAST] = ib_uverbs_attach_mcast,
107 [IB_USER_VERBS_CMD_DETACH_MCAST] = ib_uverbs_detach_mcast,
108 [IB_USER_VERBS_CMD_CREATE_SRQ] = ib_uverbs_create_srq,
109 [IB_USER_VERBS_CMD_MODIFY_SRQ] = ib_uverbs_modify_srq,
110 [IB_USER_VERBS_CMD_QUERY_SRQ] = ib_uverbs_query_srq,
111 [IB_USER_VERBS_CMD_DESTROY_SRQ] = ib_uverbs_destroy_srq,
112 [IB_USER_VERBS_CMD_CREATE_XRC_SRQ] = ib_uverbs_create_xrc_srq,
113 [IB_USER_VERBS_CMD_OPEN_XRC_DOMAIN] = ib_uverbs_open_xrc_domain,
114 [IB_USER_VERBS_CMD_CLOSE_XRC_DOMAIN] = ib_uverbs_close_xrc_domain,
115 [IB_USER_VERBS_CMD_CREATE_XRC_RCV_QP] = ib_uverbs_create_xrc_rcv_qp,
116 [IB_USER_VERBS_CMD_MODIFY_XRC_RCV_QP] = ib_uverbs_modify_xrc_rcv_qp,
117 [IB_USER_VERBS_CMD_QUERY_XRC_RCV_QP] = ib_uverbs_query_xrc_rcv_qp,
118 [IB_USER_VERBS_CMD_REG_XRC_RCV_QP] = ib_uverbs_reg_xrc_rcv_qp,
119 [IB_USER_VERBS_CMD_UNREG_XRC_RCV_QP] = ib_uverbs_unreg_xrc_rcv_qp,
123 /* BSD Does not require a fake mountpoint for all files. */
124 static struct vfsmount *uverbs_event_mnt;
127 static void ib_uverbs_add_one(struct ib_device *device);
128 static void ib_uverbs_remove_one(struct ib_device *device);
130 static void ib_uverbs_release_dev(struct kref *ref)
132 struct ib_uverbs_device *dev =
133 container_of(ref, struct ib_uverbs_device, ref);
135 complete(&dev->comp);
138 static void ib_uverbs_release_event_file(struct kref *ref)
140 struct ib_uverbs_event_file *file =
141 container_of(ref, struct ib_uverbs_event_file, ref);
146 void ib_uverbs_release_ucq(struct ib_uverbs_file *file,
147 struct ib_uverbs_event_file *ev_file,
148 struct ib_ucq_object *uobj)
150 struct ib_uverbs_event *evt, *tmp;
153 spin_lock_irq(&ev_file->lock);
154 list_for_each_entry_safe(evt, tmp, &uobj->comp_list, obj_list) {
155 list_del(&evt->list);
158 spin_unlock_irq(&ev_file->lock);
160 kref_put(&ev_file->ref, ib_uverbs_release_event_file);
163 spin_lock_irq(&file->async_file->lock);
164 list_for_each_entry_safe(evt, tmp, &uobj->async_list, obj_list) {
165 list_del(&evt->list);
168 spin_unlock_irq(&file->async_file->lock);
171 void ib_uverbs_release_uevent(struct ib_uverbs_file *file,
172 struct ib_uevent_object *uobj)
174 struct ib_uverbs_event *evt, *tmp;
176 spin_lock_irq(&file->async_file->lock);
177 list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) {
178 list_del(&evt->list);
181 spin_unlock_irq(&file->async_file->lock);
184 static void ib_uverbs_detach_umcast(struct ib_qp *qp,
185 struct ib_uqp_object *uobj)
187 struct ib_uverbs_mcast_entry *mcast, *tmp;
189 list_for_each_entry_safe(mcast, tmp, &uobj->mcast_list, list) {
190 ib_detach_mcast(qp, &mcast->gid, mcast->lid);
191 list_del(&mcast->list);
196 static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
197 struct ib_ucontext *context)
199 struct ib_uobject *uobj, *tmp;
204 context->closing = 1;
206 list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
207 struct ib_ah *ah = uobj->object;
209 idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
214 list_for_each_entry_safe(uobj, tmp, &context->qp_list, list) {
215 struct ib_qp *qp = uobj->object;
216 struct ib_uqp_object *uqp =
217 container_of(uobj, struct ib_uqp_object, uevent.uobject);
219 idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
220 ib_uverbs_detach_umcast(qp, uqp);
222 ib_uverbs_release_uevent(file, &uqp->uevent);
227 list_for_each_entry_safe(uobj, tmp, &context->srq_list, list) {
228 struct ib_srq *srq = uobj->object;
229 struct ib_uevent_object *uevent =
230 container_of(uobj, struct ib_uevent_object, uobject);
232 idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
234 ib_uverbs_release_uevent(file, uevent);
238 list_for_each_entry_safe(uobj, tmp, &context->cq_list, list) {
239 struct ib_cq *cq = uobj->object;
240 struct ib_uverbs_event_file *ev_file = cq->cq_context;
241 struct ib_ucq_object *ucq =
242 container_of(uobj, struct ib_ucq_object, uobject);
244 idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
246 ib_uverbs_release_ucq(file, ev_file, ucq);
252 list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
253 struct ib_mr *mr = uobj->object;
255 idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
260 mutex_lock(&file->device->ib_dev->xrcd_table_mutex);
261 list_for_each_entry_safe(uobj, tmp, &context->xrc_domain_list, list) {
262 struct ib_xrcd *xrcd = uobj->object;
263 struct ib_uxrc_rcv_object *xrc_qp_obj, *tmp1;
264 struct ib_uxrcd_object *xrcd_uobj =
265 container_of(uobj, struct ib_uxrcd_object, uobject);
267 list_for_each_entry_safe(xrc_qp_obj, tmp1,
268 &xrcd_uobj->xrc_reg_qp_list, list) {
269 list_del(&xrc_qp_obj->list);
270 ib_uverbs_cleanup_xrc_rcv_qp(file, xrcd,
275 idr_remove_uobj(&ib_uverbs_xrc_domain_idr, uobj);
276 ib_uverbs_dealloc_xrcd(file->device->ib_dev, xrcd);
279 mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
281 list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
282 struct ib_pd *pd = uobj->object;
284 idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
289 return context->device->dealloc_ucontext(context);
292 static void ib_uverbs_release_file(struct kref *ref)
294 struct ib_uverbs_file *file =
295 container_of(ref, struct ib_uverbs_file, ref);
297 module_put(file->device->ib_dev->owner);
298 kref_put(&file->device->ref, ib_uverbs_release_dev);
303 static ssize_t ib_uverbs_event_read(struct file *filp, char __user *buf,
304 size_t count, loff_t *pos)
306 struct ib_uverbs_event_file *file = filp->private_data;
307 struct ib_uverbs_event *event;
311 spin_lock_irq(&file->lock);
313 while (list_empty(&file->event_list)) {
314 spin_unlock_irq(&file->lock);
316 if (filp->f_flags & O_NONBLOCK)
319 if (wait_event_interruptible(file->poll_wait,
320 !list_empty(&file->event_list)))
323 spin_lock_irq(&file->lock);
326 event = list_entry(file->event_list.next, struct ib_uverbs_event, list);
329 eventsz = sizeof (struct ib_uverbs_async_event_desc);
331 eventsz = sizeof (struct ib_uverbs_comp_event_desc);
333 if (eventsz > count) {
337 list_del(file->event_list.next);
338 if (event->counter) {
340 list_del(&event->obj_list);
344 spin_unlock_irq(&file->lock);
347 if (copy_to_user(buf, event, eventsz))
358 static unsigned int ib_uverbs_event_poll(struct file *filp,
359 struct poll_table_struct *wait)
361 unsigned int pollflags = 0;
362 struct ib_uverbs_event_file *file = filp->private_data;
365 poll_wait(filp, &file->poll_wait, wait);
367 spin_lock_irq(&file->lock);
368 if (!list_empty(&file->event_list))
369 pollflags = POLLIN | POLLRDNORM;
370 spin_unlock_irq(&file->lock);
375 static int ib_uverbs_event_fasync(int fd, struct file *filp, int on)
377 struct ib_uverbs_event_file *file = filp->private_data;
379 return fasync_helper(fd, filp, on, &file->async_queue);
382 static int ib_uverbs_event_close(struct inode *inode, struct file *filp)
384 struct ib_uverbs_event_file *file = filp->private_data;
385 struct ib_uverbs_event *entry, *tmp;
387 spin_lock_irq(&file->lock);
389 list_for_each_entry_safe(entry, tmp, &file->event_list, list) {
391 list_del(&entry->obj_list);
394 spin_unlock_irq(&file->lock);
396 if (file->is_async) {
397 ib_unregister_event_handler(&file->uverbs_file->event_handler);
398 kref_put(&file->uverbs_file->ref, ib_uverbs_release_file);
400 kref_put(&file->ref, ib_uverbs_release_event_file);
405 static const struct file_operations uverbs_event_fops = {
406 .owner = THIS_MODULE,
407 .read = ib_uverbs_event_read,
408 .poll = ib_uverbs_event_poll,
409 .release = ib_uverbs_event_close,
410 .fasync = ib_uverbs_event_fasync
413 void ib_uverbs_comp_handler(struct ib_cq *cq, void *cq_context)
415 struct ib_uverbs_event_file *file = cq_context;
416 struct ib_ucq_object *uobj;
417 struct ib_uverbs_event *entry;
423 spin_lock_irqsave(&file->lock, flags);
424 if (file->is_closed) {
425 spin_unlock_irqrestore(&file->lock, flags);
429 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
431 spin_unlock_irqrestore(&file->lock, flags);
435 uobj = container_of(cq->uobject, struct ib_ucq_object, uobject);
437 entry->desc.comp.cq_handle = cq->uobject->user_handle;
438 entry->counter = &uobj->comp_events_reported;
440 list_add_tail(&entry->list, &file->event_list);
441 list_add_tail(&entry->obj_list, &uobj->comp_list);
442 spin_unlock_irqrestore(&file->lock, flags);
444 wake_up_interruptible(&file->poll_wait);
446 selwakeup(&file->filp->f_selinfo);
447 kill_fasync(&file->async_queue, SIGIO, POLL_IN);
450 static void ib_uverbs_async_handler(struct ib_uverbs_file *file,
451 __u64 element, __u64 event,
452 struct list_head *obj_list,
455 struct ib_uverbs_event *entry;
458 spin_lock_irqsave(&file->async_file->lock, flags);
459 if (file->async_file->is_closed) {
460 spin_unlock_irqrestore(&file->async_file->lock, flags);
464 entry = kmalloc(sizeof *entry, GFP_ATOMIC);
466 spin_unlock_irqrestore(&file->async_file->lock, flags);
470 entry->desc.async.element = element;
471 entry->desc.async.event_type = event;
472 entry->counter = counter;
474 list_add_tail(&entry->list, &file->async_file->event_list);
476 list_add_tail(&entry->obj_list, obj_list);
477 spin_unlock_irqrestore(&file->async_file->lock, flags);
479 wake_up_interruptible(&file->async_file->poll_wait);
480 if (file->async_file->filp)
481 selwakeup(&file->async_file->filp->f_selinfo);
482 kill_fasync(&file->async_file->async_queue, SIGIO, POLL_IN);
485 void ib_uverbs_cq_event_handler(struct ib_event *event, void *context_ptr)
487 struct ib_ucq_object *uobj = container_of(event->element.cq->uobject,
488 struct ib_ucq_object, uobject);
490 ib_uverbs_async_handler(uobj->uverbs_file, uobj->uobject.user_handle,
491 event->event, &uobj->async_list,
492 &uobj->async_events_reported);
495 void ib_uverbs_qp_event_handler(struct ib_event *event, void *context_ptr)
497 struct ib_uevent_object *uobj;
499 uobj = container_of(event->element.qp->uobject,
500 struct ib_uevent_object, uobject);
502 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
503 event->event, &uobj->event_list,
504 &uobj->events_reported);
507 void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr)
509 struct ib_uevent_object *uobj;
511 uobj = container_of(event->element.srq->uobject,
512 struct ib_uevent_object, uobject);
514 ib_uverbs_async_handler(context_ptr, uobj->uobject.user_handle,
515 event->event, &uobj->event_list,
516 &uobj->events_reported);
519 void ib_uverbs_event_handler(struct ib_event_handler *handler,
520 struct ib_event *event)
522 struct ib_uverbs_file *file =
523 container_of(handler, struct ib_uverbs_file, event_handler);
525 ib_uverbs_async_handler(file, event->element.port_num, event->event,
529 void ib_uverbs_xrc_rcv_qp_event_handler(struct ib_event *event,
532 ib_uverbs_async_handler(context_ptr, event->element.xrc_qp_num,
533 event->event, NULL, NULL);
536 struct file *ib_uverbs_alloc_event_file(struct ib_uverbs_file *uverbs_file,
537 int is_async, int *fd)
539 struct ib_uverbs_event_file *ev_file;
543 ev_file = kmalloc(sizeof *ev_file, GFP_KERNEL);
545 return ERR_PTR(-ENOMEM);
547 kref_init(&ev_file->ref);
548 spin_lock_init(&ev_file->lock);
549 INIT_LIST_HEAD(&ev_file->event_list);
550 init_waitqueue_head(&ev_file->poll_wait);
551 ev_file->uverbs_file = uverbs_file;
552 ev_file->async_queue = NULL;
553 ev_file->is_async = is_async;
554 ev_file->is_closed = 0;
555 ev_file->filp = NULL;
557 *fd = get_unused_fd();
564 * fops_get() can't fail here, because we're coming from a
565 * 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));
575 filp->private_data = ev_file;
588 * Look up a completion event file by FD. If lookup is successful,
589 * takes a ref to the event file struct that it returns; if
590 * unsuccessful, returns NULL.
592 struct ib_uverbs_event_file *ib_uverbs_lookup_comp_file(int fd)
594 struct ib_uverbs_event_file *ev_file = NULL;
601 if (filp->f_op != &uverbs_event_fops)
604 ev_file = filp->private_data;
605 if (ev_file->is_async) {
610 kref_get(&ev_file->ref);
617 static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
618 size_t count, loff_t *pos)
620 struct ib_uverbs_file *file = filp->private_data;
621 struct ib_uverbs_cmd_hdr hdr;
623 if (count < sizeof hdr)
626 if (copy_from_user(&hdr, buf, sizeof hdr))
629 if (hdr.in_words * 4 != count)
632 if (hdr.command < 0 ||
633 hdr.command >= ARRAY_SIZE(uverbs_cmd_table) ||
634 !uverbs_cmd_table[hdr.command] ||
635 !(file->device->ib_dev->uverbs_cmd_mask & (1ull << hdr.command)))
638 if (!file->ucontext &&
639 hdr.command != IB_USER_VERBS_CMD_GET_CONTEXT)
642 return uverbs_cmd_table[hdr.command](file, buf + sizeof hdr,
643 hdr.in_words * 4, hdr.out_words * 4);
646 static int ib_uverbs_mmap(struct file *filp, struct vm_area_struct *vma)
648 struct ib_uverbs_file *file = filp->private_data;
653 return file->device->ib_dev->mmap(file->ucontext, vma);
657 * ib_uverbs_open() does not need the BKL:
659 * - dev_table[] accesses are protected by map_lock, the
660 * ib_uverbs_device structures are properly reference counted, and
661 * everything else is purely local to the file being created, so
662 * races against other open calls are not a problem;
663 * - there is no ioctl method to race against;
664 * - the device is added to dev_table[] as the last part of module
665 * initialization, the open method will either immediately run
666 * -ENXIO, or all required initialization will be done.
668 static int ib_uverbs_open(struct inode *inode, struct file *filp)
670 struct ib_uverbs_device *dev;
671 struct ib_uverbs_file *file;
674 spin_lock(&map_lock);
675 dev = dev_table[iminor(inode) - IB_UVERBS_BASE_MINOR];
678 spin_unlock(&map_lock);
683 if (!try_module_get(dev->ib_dev->owner)) {
688 file = kmalloc(sizeof *file, GFP_KERNEL);
695 file->ucontext = NULL;
696 file->async_file = NULL;
697 kref_init(&file->ref);
698 mutex_init(&file->mutex);
700 filp->private_data = file;
705 module_put(dev->ib_dev->owner);
708 kref_put(&dev->ref, ib_uverbs_release_dev);
712 static int ib_uverbs_close(struct inode *inode, struct file *filp)
714 struct ib_uverbs_file *file = filp->private_data;
716 ib_uverbs_cleanup_ucontext(file, file->ucontext);
718 if (file->async_file)
719 kref_put(&file->async_file->ref, ib_uverbs_release_event_file);
721 kref_put(&file->ref, ib_uverbs_release_file);
726 static const struct file_operations uverbs_fops = {
727 .owner = THIS_MODULE,
728 .write = ib_uverbs_write,
729 .open = ib_uverbs_open,
730 .release = ib_uverbs_close
733 static const struct file_operations uverbs_mmap_fops = {
734 .owner = THIS_MODULE,
735 .write = ib_uverbs_write,
736 .mmap = ib_uverbs_mmap,
737 .open = ib_uverbs_open,
738 .release = ib_uverbs_close
741 static struct ib_client uverbs_client = {
743 .add = ib_uverbs_add_one,
744 .remove = ib_uverbs_remove_one
747 static ssize_t show_ibdev(struct device *device, struct device_attribute *attr,
750 struct ib_uverbs_device *dev = dev_get_drvdata(device);
755 return sprintf(buf, "%s\n", dev->ib_dev->name);
757 static DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
759 static ssize_t show_dev_abi_version(struct device *device,
760 struct device_attribute *attr, char *buf)
762 struct ib_uverbs_device *dev = dev_get_drvdata(device);
767 return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
769 static DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
771 static ssize_t show_abi_version(struct class *class, char *buf)
773 return sprintf(buf, "%d\n", IB_USER_VERBS_ABI_VERSION);
775 static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
777 #include <linux/pci.h>
780 show_dev_device(struct device *device, struct device_attribute *attr, char *buf)
782 struct ib_uverbs_device *dev = dev_get_drvdata(device);
787 return sprintf(buf, "0x%04x\n",
788 ((struct pci_dev *)dev->ib_dev->dma_device)->device);
790 static DEVICE_ATTR(device, S_IRUGO, show_dev_device, NULL);
793 show_dev_vendor(struct device *device, struct device_attribute *attr, char *buf)
795 struct ib_uverbs_device *dev = dev_get_drvdata(device);
800 return sprintf(buf, "0x%04x\n",
801 ((struct pci_dev *)dev->ib_dev->dma_device)->vendor);
803 static DEVICE_ATTR(vendor, S_IRUGO, show_dev_vendor, NULL);
805 struct attribute *device_attrs[] =
807 &dev_attr_device.attr,
808 &dev_attr_vendor.attr,
812 static struct attribute_group device_group = {
814 .attrs = device_attrs
817 static void ib_uverbs_add_one(struct ib_device *device)
819 struct ib_uverbs_device *uverbs_dev;
821 if (!device->alloc_ucontext)
824 uverbs_dev = kzalloc(sizeof *uverbs_dev, GFP_KERNEL);
828 kref_init(&uverbs_dev->ref);
829 init_completion(&uverbs_dev->comp);
831 spin_lock(&map_lock);
832 uverbs_dev->devnum = find_first_zero_bit(dev_map, IB_UVERBS_MAX_DEVICES);
833 if (uverbs_dev->devnum >= IB_UVERBS_MAX_DEVICES) {
834 spin_unlock(&map_lock);
837 set_bit(uverbs_dev->devnum, dev_map);
838 spin_unlock(&map_lock);
840 uverbs_dev->ib_dev = device;
841 uverbs_dev->num_comp_vectors = device->num_comp_vectors;
843 uverbs_dev->cdev = cdev_alloc();
844 if (!uverbs_dev->cdev)
846 uverbs_dev->cdev->owner = THIS_MODULE;
847 uverbs_dev->cdev->ops = device->mmap ? &uverbs_mmap_fops : &uverbs_fops;
848 kobject_set_name(&uverbs_dev->cdev->kobj, "uverbs%d", uverbs_dev->devnum);
849 if (cdev_add(uverbs_dev->cdev, IB_UVERBS_BASE_DEV + uverbs_dev->devnum, 1))
852 uverbs_dev->dev = device_create(uverbs_class, device->dma_device,
853 uverbs_dev->cdev->dev, uverbs_dev,
854 "uverbs%d", uverbs_dev->devnum);
855 if (IS_ERR(uverbs_dev->dev))
858 if (device_create_file(uverbs_dev->dev, &dev_attr_ibdev))
860 if (device_create_file(uverbs_dev->dev, &dev_attr_abi_version))
862 if (sysfs_create_group(&uverbs_dev->dev->kobj, &device_group))
865 spin_lock(&map_lock);
866 dev_table[uverbs_dev->devnum] = uverbs_dev;
867 spin_unlock(&map_lock);
869 ib_set_client_data(device, &uverbs_client, uverbs_dev);
874 device_destroy(uverbs_class, uverbs_dev->cdev->dev);
877 cdev_del(uverbs_dev->cdev);
878 clear_bit(uverbs_dev->devnum, dev_map);
881 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
882 wait_for_completion(&uverbs_dev->comp);
887 static void ib_uverbs_remove_one(struct ib_device *device)
889 struct ib_uverbs_device *uverbs_dev = ib_get_client_data(device, &uverbs_client);
894 sysfs_remove_group(&uverbs_dev->dev->kobj, &device_group);
895 dev_set_drvdata(uverbs_dev->dev, NULL);
896 device_destroy(uverbs_class, uverbs_dev->cdev->dev);
897 cdev_del(uverbs_dev->cdev);
899 spin_lock(&map_lock);
900 dev_table[uverbs_dev->devnum] = NULL;
901 spin_unlock(&map_lock);
903 clear_bit(uverbs_dev->devnum, dev_map);
905 kref_put(&uverbs_dev->ref, ib_uverbs_release_dev);
906 wait_for_completion(&uverbs_dev->comp);
910 static int uverbs_event_get_sb(struct file_system_type *fs_type, int flags,
911 const char *dev_name, void *data,
912 struct vfsmount *mnt)
914 return get_sb_pseudo(fs_type, "infinibandevent:", NULL,
915 INFINIBANDEVENTFS_MAGIC, mnt);
918 static struct file_system_type uverbs_event_fs = {
919 /* No owner field so module can be unloaded */
920 .name = "infinibandeventfs",
921 .get_sb = uverbs_event_get_sb,
922 .kill_sb = kill_litter_super
926 static int __init ib_uverbs_init(void)
930 spin_lock_init(&map_lock);
932 ret = register_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES,
935 printk(KERN_ERR "user_verbs: couldn't register device number\n");
939 uverbs_class = class_create(THIS_MODULE, "infiniband_verbs");
940 if (IS_ERR(uverbs_class)) {
941 ret = PTR_ERR(uverbs_class);
942 printk(KERN_ERR "user_verbs: couldn't create class infiniband_verbs\n");
946 ret = class_create_file(uverbs_class, &class_attr_abi_version);
948 printk(KERN_ERR "user_verbs: couldn't create abi_version attribute\n");
953 ret = register_filesystem(&uverbs_event_fs);
955 printk(KERN_ERR "user_verbs: couldn't register infinibandeventfs\n");
959 uverbs_event_mnt = kern_mount(&uverbs_event_fs);
960 if (IS_ERR(uverbs_event_mnt)) {
961 ret = PTR_ERR(uverbs_event_mnt);
962 printk(KERN_ERR "user_verbs: couldn't mount infinibandeventfs\n");
967 ret = ib_register_client(&uverbs_client);
969 printk(KERN_ERR "user_verbs: couldn't register client\n");
977 mntput(uverbs_event_mnt);
980 unregister_filesystem(&uverbs_event_fs);
984 class_destroy(uverbs_class);
987 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
993 static void __exit ib_uverbs_cleanup(void)
995 ib_unregister_client(&uverbs_client);
997 mntput(uverbs_event_mnt);
998 unregister_filesystem(&uverbs_event_fs);
1000 class_destroy(uverbs_class);
1001 unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
1002 idr_destroy(&ib_uverbs_pd_idr);
1003 idr_destroy(&ib_uverbs_mr_idr);
1004 idr_destroy(&ib_uverbs_mw_idr);
1005 idr_destroy(&ib_uverbs_ah_idr);
1006 idr_destroy(&ib_uverbs_cq_idr);
1007 idr_destroy(&ib_uverbs_qp_idr);
1008 idr_destroy(&ib_uverbs_srq_idr);
1011 module_init(ib_uverbs_init);
1012 module_exit(ib_uverbs_cleanup);