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
);
43 MODULE_AUTHOR(CORE_AUTHOR
);
44 MODULE_DESCRIPTION(CORE_DESC
);
45 MODULE_LICENSE("GPL and additional rights");
46 MODULE_PARM_DESC(debug
, "Enable debug output");
47 MODULE_PARM_DESC(vblankoffdelay
, "Delay until vblank irq auto-disable [msecs] (0: never disable, <0: disable immediately)");
48 MODULE_PARM_DESC(timestamp_precision_usec
, "Max. error on timestamps [usecs]");
49 MODULE_PARM_DESC(timestamp_monotonic
, "Use monotonic timestamps");
51 module_param_named(debug
, drm_debug
, int, 0600);
53 static DEFINE_SPINLOCK(drm_minor_lock
);
54 static struct idr drm_minors_idr
;
56 struct class *drm_class
;
57 static struct dentry
*drm_debugfs_root
;
59 void drm_err(const char *func
, const char *format
, ...)
64 va_start(args
, format
);
69 printk(KERN_ERR
"[" DRM_NAME
":%s] *ERROR* %pV", func
, &vaf
);
73 EXPORT_SYMBOL(drm_err
);
75 void drm_ut_debug_printk(const char *function_name
, const char *format
, ...)
80 va_start(args
, format
);
84 printk(KERN_DEBUG
"[" DRM_NAME
":%s] %pV", function_name
, &vaf
);
88 EXPORT_SYMBOL(drm_ut_debug_printk
);
90 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
92 struct drm_master
*drm_master_create(struct drm_minor
*minor
)
94 struct drm_master
*master
;
96 master
= kzalloc(sizeof(*master
), GFP_KERNEL
);
100 kref_init(&master
->refcount
);
101 spin_lock_init(&master
->lock
.spinlock
);
102 init_waitqueue_head(&master
->lock
.lock_queue
);
103 if (drm_ht_create(&master
->magiclist
, DRM_MAGIC_HASH_ORDER
)) {
107 INIT_LIST_HEAD(&master
->magicfree
);
108 master
->minor
= minor
;
113 struct drm_master
*drm_master_get(struct drm_master
*master
)
115 kref_get(&master
->refcount
);
118 EXPORT_SYMBOL(drm_master_get
);
120 static void drm_master_destroy(struct kref
*kref
)
122 struct drm_master
*master
= container_of(kref
, struct drm_master
, refcount
);
123 struct drm_device
*dev
= master
->minor
->dev
;
124 struct drm_map_list
*r_list
, *list_temp
;
126 mutex_lock(&dev
->struct_mutex
);
127 if (dev
->driver
->master_destroy
)
128 dev
->driver
->master_destroy(dev
, master
);
130 list_for_each_entry_safe(r_list
, list_temp
, &dev
->maplist
, head
) {
131 if (r_list
->master
== master
) {
132 drm_legacy_rmmap_locked(dev
, r_list
->map
);
137 if (master
->unique
) {
138 kfree(master
->unique
);
139 master
->unique
= NULL
;
140 master
->unique_len
= 0;
143 drm_ht_remove(&master
->magiclist
);
145 mutex_unlock(&dev
->struct_mutex
);
149 void drm_master_put(struct drm_master
**master
)
151 kref_put(&(*master
)->refcount
, drm_master_destroy
);
154 EXPORT_SYMBOL(drm_master_put
);
156 int drm_setmaster_ioctl(struct drm_device
*dev
, void *data
,
157 struct drm_file
*file_priv
)
161 mutex_lock(&dev
->master_mutex
);
162 if (file_priv
->is_master
)
165 if (file_priv
->minor
->master
) {
170 if (!file_priv
->master
) {
175 file_priv
->minor
->master
= drm_master_get(file_priv
->master
);
176 file_priv
->is_master
= 1;
177 if (dev
->driver
->master_set
) {
178 ret
= dev
->driver
->master_set(dev
, file_priv
, false);
179 if (unlikely(ret
!= 0)) {
180 file_priv
->is_master
= 0;
181 drm_master_put(&file_priv
->minor
->master
);
186 mutex_unlock(&dev
->master_mutex
);
190 int drm_dropmaster_ioctl(struct drm_device
*dev
, void *data
,
191 struct drm_file
*file_priv
)
195 mutex_lock(&dev
->master_mutex
);
196 if (!file_priv
->is_master
)
199 if (!file_priv
->minor
->master
)
203 if (dev
->driver
->master_drop
)
204 dev
->driver
->master_drop(dev
, file_priv
, false);
205 drm_master_put(&file_priv
->minor
->master
);
206 file_priv
->is_master
= 0;
209 mutex_unlock(&dev
->master_mutex
);
215 * A DRM device can provide several char-dev interfaces on the DRM-Major. Each
216 * of them is represented by a drm_minor object. Depending on the capabilities
217 * of the device-driver, different interfaces are registered.
219 * Minors can be accessed via dev->$minor_name. This pointer is either
220 * NULL or a valid drm_minor pointer and stays valid as long as the device is
221 * valid. This means, DRM minors have the same life-time as the underlying
222 * device. However, this doesn't mean that the minor is active. Minors are
223 * registered and unregistered dynamically according to device-state.
226 static struct drm_minor
**drm_minor_get_slot(struct drm_device
*dev
,
230 case DRM_MINOR_LEGACY
:
231 return &dev
->primary
;
232 case DRM_MINOR_RENDER
:
234 case DRM_MINOR_CONTROL
:
235 return &dev
->control
;
241 static int drm_minor_alloc(struct drm_device
*dev
, unsigned int type
)
243 struct drm_minor
*minor
;
247 minor
= kzalloc(sizeof(*minor
), GFP_KERNEL
);
254 idr_preload(GFP_KERNEL
);
255 spin_lock_irqsave(&drm_minor_lock
, flags
);
256 r
= idr_alloc(&drm_minors_idr
,
261 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
269 minor
->kdev
= drm_sysfs_minor_alloc(minor
);
270 if (IS_ERR(minor
->kdev
)) {
271 r
= PTR_ERR(minor
->kdev
);
275 *drm_minor_get_slot(dev
, type
) = minor
;
279 spin_lock_irqsave(&drm_minor_lock
, flags
);
280 idr_remove(&drm_minors_idr
, minor
->index
);
281 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
287 static void drm_minor_free(struct drm_device
*dev
, unsigned int type
)
289 struct drm_minor
**slot
, *minor
;
292 slot
= drm_minor_get_slot(dev
, type
);
297 drm_mode_group_destroy(&minor
->mode_group
);
298 put_device(minor
->kdev
);
300 spin_lock_irqsave(&drm_minor_lock
, flags
);
301 idr_remove(&drm_minors_idr
, minor
->index
);
302 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
308 static int drm_minor_register(struct drm_device
*dev
, unsigned int type
)
310 struct drm_minor
*minor
;
316 minor
= *drm_minor_get_slot(dev
, type
);
320 ret
= drm_debugfs_init(minor
, minor
->index
, drm_debugfs_root
);
322 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
326 ret
= device_add(minor
->kdev
);
330 /* replace NULL with @minor so lookups will succeed from now on */
331 spin_lock_irqsave(&drm_minor_lock
, flags
);
332 idr_replace(&drm_minors_idr
, minor
, minor
->index
);
333 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
335 DRM_DEBUG("new minor registered %d\n", minor
->index
);
339 drm_debugfs_cleanup(minor
);
343 static void drm_minor_unregister(struct drm_device
*dev
, unsigned int type
)
345 struct drm_minor
*minor
;
348 minor
= *drm_minor_get_slot(dev
, type
);
349 if (!minor
|| !device_is_registered(minor
->kdev
))
352 /* replace @minor with NULL so lookups will fail from now on */
353 spin_lock_irqsave(&drm_minor_lock
, flags
);
354 idr_replace(&drm_minors_idr
, NULL
, minor
->index
);
355 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
357 device_del(minor
->kdev
);
358 dev_set_drvdata(minor
->kdev
, NULL
); /* safety belt */
359 drm_debugfs_cleanup(minor
);
363 * drm_minor_acquire - Acquire a DRM minor
364 * @minor_id: Minor ID of the DRM-minor
366 * Looks up the given minor-ID and returns the respective DRM-minor object. The
367 * refence-count of the underlying device is increased so you must release this
368 * object with drm_minor_release().
370 * As long as you hold this minor, it is guaranteed that the object and the
371 * minor->dev pointer will stay valid! However, the device may get unplugged and
372 * unregistered while you hold the minor.
375 * Pointer to minor-object with increased device-refcount, or PTR_ERR on
378 struct drm_minor
*drm_minor_acquire(unsigned int minor_id
)
380 struct drm_minor
*minor
;
383 spin_lock_irqsave(&drm_minor_lock
, flags
);
384 minor
= idr_find(&drm_minors_idr
, minor_id
);
386 drm_dev_ref(minor
->dev
);
387 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
390 return ERR_PTR(-ENODEV
);
391 } else if (drm_device_is_unplugged(minor
->dev
)) {
392 drm_dev_unref(minor
->dev
);
393 return ERR_PTR(-ENODEV
);
400 * drm_minor_release - Release DRM minor
401 * @minor: Pointer to DRM minor object
403 * Release a minor that was previously acquired via drm_minor_acquire().
405 void drm_minor_release(struct drm_minor
*minor
)
407 drm_dev_unref(minor
->dev
);
411 * drm_put_dev - Unregister and release a DRM device
414 * Called at module unload time or when a PCI device is unplugged.
416 * Use of this function is discouraged. It will eventually go away completely.
417 * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead.
419 * Cleans up all DRM device, calling drm_lastclose().
421 void drm_put_dev(struct drm_device
*dev
)
426 DRM_ERROR("cleanup called no dev\n");
430 drm_dev_unregister(dev
);
433 EXPORT_SYMBOL(drm_put_dev
);
435 void drm_unplug_dev(struct drm_device
*dev
)
437 /* for a USB device */
438 drm_minor_unregister(dev
, DRM_MINOR_LEGACY
);
439 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
440 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
442 mutex_lock(&drm_global_mutex
);
444 drm_device_set_unplugged(dev
);
446 if (dev
->open_count
== 0) {
449 mutex_unlock(&drm_global_mutex
);
451 EXPORT_SYMBOL(drm_unplug_dev
);
455 * We want to be able to allocate our own "struct address_space" to control
456 * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow
457 * stand-alone address_space objects, so we need an underlying inode. As there
458 * is no way to allocate an independent inode easily, we need a fake internal
461 * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free()
462 * frees it again. You are allowed to use iget() and iput() to get references to
463 * the inode. But each drm_fs_inode_new() call must be paired with exactly one
464 * drm_fs_inode_free() call (which does not have to be the last iput()).
465 * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it
466 * between multiple inode-users. You could, technically, call
467 * iget() + drm_fs_inode_free() directly after alloc and sometime later do an
468 * iput(), but this way you'd end up with a new vfsmount for each inode.
471 static int drm_fs_cnt
;
472 static struct vfsmount
*drm_fs_mnt
;
474 static const struct dentry_operations drm_fs_dops
= {
475 .d_dname
= simple_dname
,
478 static const struct super_operations drm_fs_sops
= {
479 .statfs
= simple_statfs
,
482 static struct dentry
*drm_fs_mount(struct file_system_type
*fs_type
, int flags
,
483 const char *dev_name
, void *data
)
485 return mount_pseudo(fs_type
,
492 static struct file_system_type drm_fs_type
= {
494 .owner
= THIS_MODULE
,
495 .mount
= drm_fs_mount
,
496 .kill_sb
= kill_anon_super
,
499 static struct inode
*drm_fs_inode_new(void)
504 r
= simple_pin_fs(&drm_fs_type
, &drm_fs_mnt
, &drm_fs_cnt
);
506 DRM_ERROR("Cannot mount pseudo fs: %d\n", r
);
510 inode
= alloc_anon_inode(drm_fs_mnt
->mnt_sb
);
512 simple_release_fs(&drm_fs_mnt
, &drm_fs_cnt
);
517 static void drm_fs_inode_free(struct inode
*inode
)
521 simple_release_fs(&drm_fs_mnt
, &drm_fs_cnt
);
526 * drm_dev_alloc - Allocate new DRM device
527 * @driver: DRM driver to allocate device for
528 * @parent: Parent device object
530 * Allocate and initialize a new DRM device. No device registration is done.
531 * Call drm_dev_register() to advertice the device to user space and register it
532 * with other core subsystems.
534 * The initial ref-count of the object is 1. Use drm_dev_ref() and
535 * drm_dev_unref() to take and drop further ref-counts.
538 * Pointer to new DRM device, or NULL if out of memory.
540 struct drm_device
*drm_dev_alloc(struct drm_driver
*driver
,
541 struct device
*parent
)
543 struct drm_device
*dev
;
546 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
550 kref_init(&dev
->ref
);
552 dev
->driver
= driver
;
554 INIT_LIST_HEAD(&dev
->filelist
);
555 INIT_LIST_HEAD(&dev
->ctxlist
);
556 INIT_LIST_HEAD(&dev
->vmalist
);
557 INIT_LIST_HEAD(&dev
->maplist
);
558 INIT_LIST_HEAD(&dev
->vblank_event_list
);
560 spin_lock_init(&dev
->buf_lock
);
561 spin_lock_init(&dev
->event_lock
);
562 mutex_init(&dev
->struct_mutex
);
563 mutex_init(&dev
->ctxlist_mutex
);
564 mutex_init(&dev
->master_mutex
);
566 dev
->anon_inode
= drm_fs_inode_new();
567 if (IS_ERR(dev
->anon_inode
)) {
568 ret
= PTR_ERR(dev
->anon_inode
);
569 DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret
);
573 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
574 ret
= drm_minor_alloc(dev
, DRM_MINOR_CONTROL
);
579 if (drm_core_check_feature(dev
, DRIVER_RENDER
)) {
580 ret
= drm_minor_alloc(dev
, DRM_MINOR_RENDER
);
585 ret
= drm_minor_alloc(dev
, DRM_MINOR_LEGACY
);
589 if (drm_ht_create(&dev
->map_hash
, 12))
592 ret
= drm_legacy_ctxbitmap_init(dev
);
594 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
598 if (drm_core_check_feature(dev
, DRIVER_GEM
)) {
599 ret
= drm_gem_init(dev
);
601 DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
609 drm_legacy_ctxbitmap_cleanup(dev
);
611 drm_ht_remove(&dev
->map_hash
);
613 drm_minor_free(dev
, DRM_MINOR_LEGACY
);
614 drm_minor_free(dev
, DRM_MINOR_RENDER
);
615 drm_minor_free(dev
, DRM_MINOR_CONTROL
);
616 drm_fs_inode_free(dev
->anon_inode
);
618 mutex_destroy(&dev
->master_mutex
);
622 EXPORT_SYMBOL(drm_dev_alloc
);
624 static void drm_dev_release(struct kref
*ref
)
626 struct drm_device
*dev
= container_of(ref
, struct drm_device
, ref
);
628 if (drm_core_check_feature(dev
, DRIVER_GEM
))
629 drm_gem_destroy(dev
);
631 drm_legacy_ctxbitmap_cleanup(dev
);
632 drm_ht_remove(&dev
->map_hash
);
633 drm_fs_inode_free(dev
->anon_inode
);
635 drm_minor_free(dev
, DRM_MINOR_LEGACY
);
636 drm_minor_free(dev
, DRM_MINOR_RENDER
);
637 drm_minor_free(dev
, DRM_MINOR_CONTROL
);
639 mutex_destroy(&dev
->master_mutex
);
645 * drm_dev_ref - Take reference of a DRM device
646 * @dev: device to take reference of or NULL
648 * This increases the ref-count of @dev by one. You *must* already own a
649 * reference when calling this. Use drm_dev_unref() to drop this reference
652 * This function never fails. However, this function does not provide *any*
653 * guarantee whether the device is alive or running. It only provides a
654 * reference to the object and the memory associated with it.
656 void drm_dev_ref(struct drm_device
*dev
)
661 EXPORT_SYMBOL(drm_dev_ref
);
664 * drm_dev_unref - Drop reference of a DRM device
665 * @dev: device to drop reference of or NULL
667 * This decreases the ref-count of @dev by one. The device is destroyed if the
668 * ref-count drops to zero.
670 void drm_dev_unref(struct drm_device
*dev
)
673 kref_put(&dev
->ref
, drm_dev_release
);
675 EXPORT_SYMBOL(drm_dev_unref
);
678 * drm_dev_register - Register DRM device
679 * @dev: Device to register
680 * @flags: Flags passed to the driver's .load() function
682 * Register the DRM device @dev with the system, advertise device to user-space
683 * and start normal device operation. @dev must be allocated via drm_dev_alloc()
686 * Never call this twice on any device!
689 * 0 on success, negative error code on failure.
691 int drm_dev_register(struct drm_device
*dev
, unsigned long flags
)
695 mutex_lock(&drm_global_mutex
);
697 ret
= drm_minor_register(dev
, DRM_MINOR_CONTROL
);
701 ret
= drm_minor_register(dev
, DRM_MINOR_RENDER
);
705 ret
= drm_minor_register(dev
, DRM_MINOR_LEGACY
);
709 if (dev
->driver
->load
) {
710 ret
= dev
->driver
->load(dev
, flags
);
715 /* setup grouping for legacy outputs */
716 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
717 ret
= drm_mode_group_init_legacy_group(dev
,
718 &dev
->primary
->mode_group
);
727 if (dev
->driver
->unload
)
728 dev
->driver
->unload(dev
);
730 drm_minor_unregister(dev
, DRM_MINOR_LEGACY
);
731 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
732 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
734 mutex_unlock(&drm_global_mutex
);
737 EXPORT_SYMBOL(drm_dev_register
);
740 * drm_dev_unregister - Unregister DRM device
741 * @dev: Device to unregister
743 * Unregister the DRM device from the system. This does the reverse of
744 * drm_dev_register() but does not deallocate the device. The caller must call
745 * drm_dev_unref() to drop their final reference.
747 void drm_dev_unregister(struct drm_device
*dev
)
749 struct drm_map_list
*r_list
, *list_temp
;
753 if (dev
->driver
->unload
)
754 dev
->driver
->unload(dev
);
757 drm_pci_agp_destroy(dev
);
759 drm_vblank_cleanup(dev
);
761 list_for_each_entry_safe(r_list
, list_temp
, &dev
->maplist
, head
)
762 drm_legacy_rmmap(dev
, r_list
->map
);
764 drm_minor_unregister(dev
, DRM_MINOR_LEGACY
);
765 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
766 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
768 EXPORT_SYMBOL(drm_dev_unregister
);
771 * drm_dev_set_unique - Set the unique name of a DRM device
772 * @dev: device of which to set the unique name
773 * @fmt: format string for unique name
775 * Sets the unique name of a DRM device using the specified format string and
776 * a variable list of arguments. Drivers can use this at driver probe time if
777 * the unique name of the devices they drive is static.
779 * Return: 0 on success or a negative error code on failure.
781 int drm_dev_set_unique(struct drm_device
*dev
, const char *fmt
, ...)
788 dev
->unique
= kvasprintf(GFP_KERNEL
, fmt
, ap
);
791 return dev
->unique
? 0 : -ENOMEM
;
793 EXPORT_SYMBOL(drm_dev_set_unique
);
797 * The DRM core module initializes all global DRM objects and makes them
798 * available to drivers. Once setup, drivers can probe their respective
800 * Currently, core management includes:
801 * - The "DRM-Global" key/value database
802 * - Global ID management for connectors
803 * - DRM major number allocation
804 * - DRM minor management
808 * Furthermore, the DRM core provides dynamic char-dev lookups. For each
809 * interface registered on a DRM device, you can request minor numbers from DRM
810 * core. DRM core takes care of major-number management and char-dev
811 * registration. A stub ->open() callback forwards any open() requests to the
815 static int drm_stub_open(struct inode
*inode
, struct file
*filp
)
817 const struct file_operations
*new_fops
;
818 struct drm_minor
*minor
;
823 mutex_lock(&drm_global_mutex
);
824 minor
= drm_minor_acquire(iminor(inode
));
826 err
= PTR_ERR(minor
);
830 new_fops
= fops_get(minor
->dev
->driver
->fops
);
836 replace_fops(filp
, new_fops
);
837 if (filp
->f_op
->open
)
838 err
= filp
->f_op
->open(inode
, filp
);
843 drm_minor_release(minor
);
845 mutex_unlock(&drm_global_mutex
);
849 static const struct file_operations drm_stub_fops
= {
850 .owner
= THIS_MODULE
,
851 .open
= drm_stub_open
,
852 .llseek
= noop_llseek
,
855 static int __init
drm_core_init(void)
860 drm_connector_ida_init();
861 idr_init(&drm_minors_idr
);
863 if (register_chrdev(DRM_MAJOR
, "drm", &drm_stub_fops
))
866 drm_class
= drm_sysfs_create(THIS_MODULE
, "drm");
867 if (IS_ERR(drm_class
)) {
868 printk(KERN_ERR
"DRM: Error creating drm class.\n");
869 ret
= PTR_ERR(drm_class
);
873 drm_debugfs_root
= debugfs_create_dir("dri", NULL
);
874 if (!drm_debugfs_root
) {
875 DRM_ERROR("Cannot create /sys/kernel/debug/dri\n");
880 DRM_INFO("Initialized %s %d.%d.%d %s\n",
881 CORE_NAME
, CORE_MAJOR
, CORE_MINOR
, CORE_PATCHLEVEL
, CORE_DATE
);
886 unregister_chrdev(DRM_MAJOR
, "drm");
888 idr_destroy(&drm_minors_idr
);
893 static void __exit
drm_core_exit(void)
895 debugfs_remove(drm_debugfs_root
);
898 unregister_chrdev(DRM_MAJOR
, "drm");
900 drm_connector_ida_destroy();
901 idr_destroy(&drm_minors_idr
);
904 module_init(drm_core_init
);
905 module_exit(drm_core_exit
);