2 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
4 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
7 * Author Rickard E. (Rik) Faith <faith@valinux.com>
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice (including the next
17 * paragraph) shall be included in all copies or substantial portions of the
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
29 #include <linux/debugfs.h>
31 #include <linux/module.h>
32 #include <linux/moduleparam.h>
33 #include <linux/mount.h>
34 #include <linux/slab.h>
36 #include <drm/drm_core.h>
37 #include "drm_legacy.h"
38 #include "drm_internal.h"
40 unsigned int drm_debug
= 0; /* 1 to enable debug output */
41 EXPORT_SYMBOL(drm_debug
);
45 MODULE_AUTHOR(CORE_AUTHOR
);
46 MODULE_DESCRIPTION(CORE_DESC
);
47 MODULE_LICENSE("GPL and additional rights");
48 MODULE_PARM_DESC(debug
, "Enable debug output");
49 MODULE_PARM_DESC(atomic
, "Enable experimental atomic KMS API");
50 MODULE_PARM_DESC(vblankoffdelay
, "Delay until vblank irq auto-disable [msecs] (0: never disable, <0: disable immediately)");
51 MODULE_PARM_DESC(timestamp_precision_usec
, "Max. error on timestamps [usecs]");
52 MODULE_PARM_DESC(timestamp_monotonic
, "Use monotonic timestamps");
54 module_param_named(debug
, drm_debug
, int, 0600);
55 module_param_named_unsafe(atomic
, drm_atomic
, bool, 0600);
57 static DEFINE_SPINLOCK(drm_minor_lock
);
58 static struct idr drm_minors_idr
;
60 struct class *drm_class
;
61 static struct dentry
*drm_debugfs_root
;
63 void drm_err(const char *format
, ...)
68 va_start(args
, format
);
73 printk(KERN_ERR
"[" DRM_NAME
":%ps] *ERROR* %pV",
74 __builtin_return_address(0), &vaf
);
78 EXPORT_SYMBOL(drm_err
);
80 void drm_ut_debug_printk(const char *function_name
, const char *format
, ...)
85 va_start(args
, format
);
89 printk(KERN_DEBUG
"[" DRM_NAME
":%s] %pV", function_name
, &vaf
);
93 EXPORT_SYMBOL(drm_ut_debug_printk
);
95 struct drm_master
*drm_master_create(struct drm_minor
*minor
)
97 struct drm_master
*master
;
99 master
= kzalloc(sizeof(*master
), GFP_KERNEL
);
103 kref_init(&master
->refcount
);
104 spin_lock_init(&master
->lock
.spinlock
);
105 init_waitqueue_head(&master
->lock
.lock_queue
);
106 idr_init(&master
->magic_map
);
107 master
->minor
= minor
;
112 struct drm_master
*drm_master_get(struct drm_master
*master
)
114 kref_get(&master
->refcount
);
117 EXPORT_SYMBOL(drm_master_get
);
119 static void drm_master_destroy(struct kref
*kref
)
121 struct drm_master
*master
= container_of(kref
, struct drm_master
, refcount
);
122 struct drm_device
*dev
= master
->minor
->dev
;
123 struct drm_map_list
*r_list
, *list_temp
;
125 mutex_lock(&dev
->struct_mutex
);
126 if (dev
->driver
->master_destroy
)
127 dev
->driver
->master_destroy(dev
, master
);
129 list_for_each_entry_safe(r_list
, list_temp
, &dev
->maplist
, head
) {
130 if (r_list
->master
== master
) {
131 drm_legacy_rmmap_locked(dev
, r_list
->map
);
135 mutex_unlock(&dev
->struct_mutex
);
137 idr_destroy(&master
->magic_map
);
138 kfree(master
->unique
);
142 void drm_master_put(struct drm_master
**master
)
144 kref_put(&(*master
)->refcount
, drm_master_destroy
);
147 EXPORT_SYMBOL(drm_master_put
);
149 int drm_setmaster_ioctl(struct drm_device
*dev
, void *data
,
150 struct drm_file
*file_priv
)
154 mutex_lock(&dev
->master_mutex
);
155 if (file_priv
->is_master
)
158 if (file_priv
->minor
->master
) {
163 if (!file_priv
->master
) {
168 file_priv
->minor
->master
= drm_master_get(file_priv
->master
);
169 file_priv
->is_master
= 1;
170 if (dev
->driver
->master_set
) {
171 ret
= dev
->driver
->master_set(dev
, file_priv
, false);
172 if (unlikely(ret
!= 0)) {
173 file_priv
->is_master
= 0;
174 drm_master_put(&file_priv
->minor
->master
);
179 mutex_unlock(&dev
->master_mutex
);
183 int drm_dropmaster_ioctl(struct drm_device
*dev
, void *data
,
184 struct drm_file
*file_priv
)
188 mutex_lock(&dev
->master_mutex
);
189 if (!file_priv
->is_master
)
192 if (!file_priv
->minor
->master
)
196 if (dev
->driver
->master_drop
)
197 dev
->driver
->master_drop(dev
, file_priv
, false);
198 drm_master_put(&file_priv
->minor
->master
);
199 file_priv
->is_master
= 0;
202 mutex_unlock(&dev
->master_mutex
);
208 * A DRM device can provide several char-dev interfaces on the DRM-Major. Each
209 * of them is represented by a drm_minor object. Depending on the capabilities
210 * of the device-driver, different interfaces are registered.
212 * Minors can be accessed via dev->$minor_name. This pointer is either
213 * NULL or a valid drm_minor pointer and stays valid as long as the device is
214 * valid. This means, DRM minors have the same life-time as the underlying
215 * device. However, this doesn't mean that the minor is active. Minors are
216 * registered and unregistered dynamically according to device-state.
219 static struct drm_minor
**drm_minor_get_slot(struct drm_device
*dev
,
223 case DRM_MINOR_LEGACY
:
224 return &dev
->primary
;
225 case DRM_MINOR_RENDER
:
227 case DRM_MINOR_CONTROL
:
228 return &dev
->control
;
234 static int drm_minor_alloc(struct drm_device
*dev
, unsigned int type
)
236 struct drm_minor
*minor
;
240 minor
= kzalloc(sizeof(*minor
), GFP_KERNEL
);
247 idr_preload(GFP_KERNEL
);
248 spin_lock_irqsave(&drm_minor_lock
, flags
);
249 r
= idr_alloc(&drm_minors_idr
,
254 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
262 minor
->kdev
= drm_sysfs_minor_alloc(minor
);
263 if (IS_ERR(minor
->kdev
)) {
264 r
= PTR_ERR(minor
->kdev
);
268 *drm_minor_get_slot(dev
, type
) = minor
;
272 spin_lock_irqsave(&drm_minor_lock
, flags
);
273 idr_remove(&drm_minors_idr
, minor
->index
);
274 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
280 static void drm_minor_free(struct drm_device
*dev
, unsigned int type
)
282 struct drm_minor
**slot
, *minor
;
285 slot
= drm_minor_get_slot(dev
, type
);
290 drm_mode_group_destroy(&minor
->mode_group
);
291 put_device(minor
->kdev
);
293 spin_lock_irqsave(&drm_minor_lock
, flags
);
294 idr_remove(&drm_minors_idr
, minor
->index
);
295 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
301 static int drm_minor_register(struct drm_device
*dev
, unsigned int type
)
303 struct drm_minor
*minor
;
309 minor
= *drm_minor_get_slot(dev
, type
);
313 ret
= drm_debugfs_init(minor
, minor
->index
, drm_debugfs_root
);
315 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
319 ret
= device_add(minor
->kdev
);
323 /* replace NULL with @minor so lookups will succeed from now on */
324 spin_lock_irqsave(&drm_minor_lock
, flags
);
325 idr_replace(&drm_minors_idr
, minor
, minor
->index
);
326 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
328 DRM_DEBUG("new minor registered %d\n", minor
->index
);
332 drm_debugfs_cleanup(minor
);
336 static void drm_minor_unregister(struct drm_device
*dev
, unsigned int type
)
338 struct drm_minor
*minor
;
341 minor
= *drm_minor_get_slot(dev
, type
);
342 if (!minor
|| !device_is_registered(minor
->kdev
))
345 /* replace @minor with NULL so lookups will fail from now on */
346 spin_lock_irqsave(&drm_minor_lock
, flags
);
347 idr_replace(&drm_minors_idr
, NULL
, minor
->index
);
348 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
350 device_del(minor
->kdev
);
351 dev_set_drvdata(minor
->kdev
, NULL
); /* safety belt */
352 drm_debugfs_cleanup(minor
);
356 * drm_minor_acquire - Acquire a DRM minor
357 * @minor_id: Minor ID of the DRM-minor
359 * Looks up the given minor-ID and returns the respective DRM-minor object. The
360 * refence-count of the underlying device is increased so you must release this
361 * object with drm_minor_release().
363 * As long as you hold this minor, it is guaranteed that the object and the
364 * minor->dev pointer will stay valid! However, the device may get unplugged and
365 * unregistered while you hold the minor.
368 * Pointer to minor-object with increased device-refcount, or PTR_ERR on
371 struct drm_minor
*drm_minor_acquire(unsigned int minor_id
)
373 struct drm_minor
*minor
;
376 spin_lock_irqsave(&drm_minor_lock
, flags
);
377 minor
= idr_find(&drm_minors_idr
, minor_id
);
379 drm_dev_ref(minor
->dev
);
380 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
383 return ERR_PTR(-ENODEV
);
384 } else if (drm_device_is_unplugged(minor
->dev
)) {
385 drm_dev_unref(minor
->dev
);
386 return ERR_PTR(-ENODEV
);
393 * drm_minor_release - Release DRM minor
394 * @minor: Pointer to DRM minor object
396 * Release a minor that was previously acquired via drm_minor_acquire().
398 void drm_minor_release(struct drm_minor
*minor
)
400 drm_dev_unref(minor
->dev
);
404 * drm_put_dev - Unregister and release a DRM device
407 * Called at module unload time or when a PCI device is unplugged.
409 * Use of this function is discouraged. It will eventually go away completely.
410 * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead.
412 * Cleans up all DRM device, calling drm_lastclose().
414 void drm_put_dev(struct drm_device
*dev
)
419 DRM_ERROR("cleanup called no dev\n");
423 drm_dev_unregister(dev
);
426 EXPORT_SYMBOL(drm_put_dev
);
428 void drm_unplug_dev(struct drm_device
*dev
)
430 /* for a USB device */
431 drm_minor_unregister(dev
, DRM_MINOR_LEGACY
);
432 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
433 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
435 mutex_lock(&drm_global_mutex
);
437 drm_device_set_unplugged(dev
);
439 if (dev
->open_count
== 0) {
442 mutex_unlock(&drm_global_mutex
);
444 EXPORT_SYMBOL(drm_unplug_dev
);
448 * We want to be able to allocate our own "struct address_space" to control
449 * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow
450 * stand-alone address_space objects, so we need an underlying inode. As there
451 * is no way to allocate an independent inode easily, we need a fake internal
454 * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free()
455 * frees it again. You are allowed to use iget() and iput() to get references to
456 * the inode. But each drm_fs_inode_new() call must be paired with exactly one
457 * drm_fs_inode_free() call (which does not have to be the last iput()).
458 * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it
459 * between multiple inode-users. You could, technically, call
460 * iget() + drm_fs_inode_free() directly after alloc and sometime later do an
461 * iput(), but this way you'd end up with a new vfsmount for each inode.
464 static int drm_fs_cnt
;
465 static struct vfsmount
*drm_fs_mnt
;
467 static const struct dentry_operations drm_fs_dops
= {
468 .d_dname
= simple_dname
,
471 static const struct super_operations drm_fs_sops
= {
472 .statfs
= simple_statfs
,
475 static struct dentry
*drm_fs_mount(struct file_system_type
*fs_type
, int flags
,
476 const char *dev_name
, void *data
)
478 return mount_pseudo(fs_type
,
485 static struct file_system_type drm_fs_type
= {
487 .owner
= THIS_MODULE
,
488 .mount
= drm_fs_mount
,
489 .kill_sb
= kill_anon_super
,
492 static struct inode
*drm_fs_inode_new(void)
497 r
= simple_pin_fs(&drm_fs_type
, &drm_fs_mnt
, &drm_fs_cnt
);
499 DRM_ERROR("Cannot mount pseudo fs: %d\n", r
);
503 inode
= alloc_anon_inode(drm_fs_mnt
->mnt_sb
);
505 simple_release_fs(&drm_fs_mnt
, &drm_fs_cnt
);
510 static void drm_fs_inode_free(struct inode
*inode
)
514 simple_release_fs(&drm_fs_mnt
, &drm_fs_cnt
);
519 * drm_dev_alloc - Allocate new DRM device
520 * @driver: DRM driver to allocate device for
521 * @parent: Parent device object
523 * Allocate and initialize a new DRM device. No device registration is done.
524 * Call drm_dev_register() to advertice the device to user space and register it
525 * with other core subsystems.
527 * The initial ref-count of the object is 1. Use drm_dev_ref() and
528 * drm_dev_unref() to take and drop further ref-counts.
530 * Note that for purely virtual devices @parent can be NULL.
533 * Pointer to new DRM device, or NULL if out of memory.
535 struct drm_device
*drm_dev_alloc(struct drm_driver
*driver
,
536 struct device
*parent
)
538 struct drm_device
*dev
;
541 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
545 kref_init(&dev
->ref
);
547 dev
->driver
= driver
;
549 INIT_LIST_HEAD(&dev
->filelist
);
550 INIT_LIST_HEAD(&dev
->ctxlist
);
551 INIT_LIST_HEAD(&dev
->vmalist
);
552 INIT_LIST_HEAD(&dev
->maplist
);
553 INIT_LIST_HEAD(&dev
->vblank_event_list
);
555 spin_lock_init(&dev
->buf_lock
);
556 spin_lock_init(&dev
->event_lock
);
557 mutex_init(&dev
->struct_mutex
);
558 mutex_init(&dev
->ctxlist_mutex
);
559 mutex_init(&dev
->master_mutex
);
561 dev
->anon_inode
= drm_fs_inode_new();
562 if (IS_ERR(dev
->anon_inode
)) {
563 ret
= PTR_ERR(dev
->anon_inode
);
564 DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret
);
568 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
569 ret
= drm_minor_alloc(dev
, DRM_MINOR_CONTROL
);
574 if (drm_core_check_feature(dev
, DRIVER_RENDER
)) {
575 ret
= drm_minor_alloc(dev
, DRM_MINOR_RENDER
);
580 ret
= drm_minor_alloc(dev
, DRM_MINOR_LEGACY
);
584 if (drm_ht_create(&dev
->map_hash
, 12))
587 ret
= drm_legacy_ctxbitmap_init(dev
);
589 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
593 if (drm_core_check_feature(dev
, DRIVER_GEM
)) {
594 ret
= drm_gem_init(dev
);
596 DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
604 drm_legacy_ctxbitmap_cleanup(dev
);
606 drm_ht_remove(&dev
->map_hash
);
608 drm_minor_free(dev
, DRM_MINOR_LEGACY
);
609 drm_minor_free(dev
, DRM_MINOR_RENDER
);
610 drm_minor_free(dev
, DRM_MINOR_CONTROL
);
611 drm_fs_inode_free(dev
->anon_inode
);
613 mutex_destroy(&dev
->master_mutex
);
617 EXPORT_SYMBOL(drm_dev_alloc
);
619 static void drm_dev_release(struct kref
*ref
)
621 struct drm_device
*dev
= container_of(ref
, struct drm_device
, ref
);
623 if (drm_core_check_feature(dev
, DRIVER_GEM
))
624 drm_gem_destroy(dev
);
626 drm_legacy_ctxbitmap_cleanup(dev
);
627 drm_ht_remove(&dev
->map_hash
);
628 drm_fs_inode_free(dev
->anon_inode
);
630 drm_minor_free(dev
, DRM_MINOR_LEGACY
);
631 drm_minor_free(dev
, DRM_MINOR_RENDER
);
632 drm_minor_free(dev
, DRM_MINOR_CONTROL
);
634 mutex_destroy(&dev
->master_mutex
);
640 * drm_dev_ref - Take reference of a DRM device
641 * @dev: device to take reference of or NULL
643 * This increases the ref-count of @dev by one. You *must* already own a
644 * reference when calling this. Use drm_dev_unref() to drop this reference
647 * This function never fails. However, this function does not provide *any*
648 * guarantee whether the device is alive or running. It only provides a
649 * reference to the object and the memory associated with it.
651 void drm_dev_ref(struct drm_device
*dev
)
656 EXPORT_SYMBOL(drm_dev_ref
);
659 * drm_dev_unref - Drop reference of a DRM device
660 * @dev: device to drop reference of or NULL
662 * This decreases the ref-count of @dev by one. The device is destroyed if the
663 * ref-count drops to zero.
665 void drm_dev_unref(struct drm_device
*dev
)
668 kref_put(&dev
->ref
, drm_dev_release
);
670 EXPORT_SYMBOL(drm_dev_unref
);
673 * drm_dev_register - Register DRM device
674 * @dev: Device to register
675 * @flags: Flags passed to the driver's .load() function
677 * Register the DRM device @dev with the system, advertise device to user-space
678 * and start normal device operation. @dev must be allocated via drm_dev_alloc()
681 * Never call this twice on any device!
684 * 0 on success, negative error code on failure.
686 int drm_dev_register(struct drm_device
*dev
, unsigned long flags
)
690 mutex_lock(&drm_global_mutex
);
692 ret
= drm_minor_register(dev
, DRM_MINOR_CONTROL
);
696 ret
= drm_minor_register(dev
, DRM_MINOR_RENDER
);
700 ret
= drm_minor_register(dev
, DRM_MINOR_LEGACY
);
704 if (dev
->driver
->load
) {
705 ret
= dev
->driver
->load(dev
, flags
);
710 /* setup grouping for legacy outputs */
711 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
712 ret
= drm_mode_group_init_legacy_group(dev
,
713 &dev
->primary
->mode_group
);
722 if (dev
->driver
->unload
)
723 dev
->driver
->unload(dev
);
725 drm_minor_unregister(dev
, DRM_MINOR_LEGACY
);
726 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
727 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
729 mutex_unlock(&drm_global_mutex
);
732 EXPORT_SYMBOL(drm_dev_register
);
735 * drm_dev_unregister - Unregister DRM device
736 * @dev: Device to unregister
738 * Unregister the DRM device from the system. This does the reverse of
739 * drm_dev_register() but does not deallocate the device. The caller must call
740 * drm_dev_unref() to drop their final reference.
742 void drm_dev_unregister(struct drm_device
*dev
)
744 struct drm_map_list
*r_list
, *list_temp
;
748 if (dev
->driver
->unload
)
749 dev
->driver
->unload(dev
);
752 drm_pci_agp_destroy(dev
);
754 drm_vblank_cleanup(dev
);
756 list_for_each_entry_safe(r_list
, list_temp
, &dev
->maplist
, head
)
757 drm_legacy_rmmap(dev
, r_list
->map
);
759 drm_minor_unregister(dev
, DRM_MINOR_LEGACY
);
760 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
761 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
763 EXPORT_SYMBOL(drm_dev_unregister
);
766 * drm_dev_set_unique - Set the unique name of a DRM device
767 * @dev: device of which to set the unique name
768 * @fmt: format string for unique name
770 * Sets the unique name of a DRM device using the specified format string and
771 * a variable list of arguments. Drivers can use this at driver probe time if
772 * the unique name of the devices they drive is static.
774 * Return: 0 on success or a negative error code on failure.
776 int drm_dev_set_unique(struct drm_device
*dev
, const char *fmt
, ...)
783 dev
->unique
= kvasprintf(GFP_KERNEL
, fmt
, ap
);
786 return dev
->unique
? 0 : -ENOMEM
;
788 EXPORT_SYMBOL(drm_dev_set_unique
);
792 * The DRM core module initializes all global DRM objects and makes them
793 * available to drivers. Once setup, drivers can probe their respective
795 * Currently, core management includes:
796 * - The "DRM-Global" key/value database
797 * - Global ID management for connectors
798 * - DRM major number allocation
799 * - DRM minor management
803 * Furthermore, the DRM core provides dynamic char-dev lookups. For each
804 * interface registered on a DRM device, you can request minor numbers from DRM
805 * core. DRM core takes care of major-number management and char-dev
806 * registration. A stub ->open() callback forwards any open() requests to the
810 static int drm_stub_open(struct inode
*inode
, struct file
*filp
)
812 const struct file_operations
*new_fops
;
813 struct drm_minor
*minor
;
818 mutex_lock(&drm_global_mutex
);
819 minor
= drm_minor_acquire(iminor(inode
));
821 err
= PTR_ERR(minor
);
825 new_fops
= fops_get(minor
->dev
->driver
->fops
);
831 replace_fops(filp
, new_fops
);
832 if (filp
->f_op
->open
)
833 err
= filp
->f_op
->open(inode
, filp
);
838 drm_minor_release(minor
);
840 mutex_unlock(&drm_global_mutex
);
844 static const struct file_operations drm_stub_fops
= {
845 .owner
= THIS_MODULE
,
846 .open
= drm_stub_open
,
847 .llseek
= noop_llseek
,
850 static int __init
drm_core_init(void)
855 drm_connector_ida_init();
856 idr_init(&drm_minors_idr
);
858 if (register_chrdev(DRM_MAJOR
, "drm", &drm_stub_fops
))
861 drm_class
= drm_sysfs_create(THIS_MODULE
, "drm");
862 if (IS_ERR(drm_class
)) {
863 printk(KERN_ERR
"DRM: Error creating drm class.\n");
864 ret
= PTR_ERR(drm_class
);
868 drm_debugfs_root
= debugfs_create_dir("dri", NULL
);
869 if (!drm_debugfs_root
) {
870 DRM_ERROR("Cannot create /sys/kernel/debug/dri\n");
875 DRM_INFO("Initialized %s %d.%d.%d %s\n",
876 CORE_NAME
, CORE_MAJOR
, CORE_MINOR
, CORE_PATCHLEVEL
, CORE_DATE
);
881 unregister_chrdev(DRM_MAJOR
, "drm");
883 idr_destroy(&drm_minors_idr
);
888 static void __exit
drm_core_exit(void)
890 debugfs_remove(drm_debugfs_root
);
893 unregister_chrdev(DRM_MAJOR
, "drm");
895 drm_connector_ida_destroy();
896 idr_destroy(&drm_minors_idr
);
899 module_init(drm_core_init
);
900 module_exit(drm_core_exit
);