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"
39 unsigned int drm_debug
= 0; /* 1 to enable debug output */
40 EXPORT_SYMBOL(drm_debug
);
42 unsigned int drm_vblank_offdelay
= 5000; /* Default to 5000 msecs. */
44 unsigned int drm_timestamp_precision
= 20; /* Default to 20 usecs. */
47 * Default to use monotonic timestamps for wait-for-vblank and page-flip
50 unsigned int drm_timestamp_monotonic
= 1;
52 MODULE_AUTHOR(CORE_AUTHOR
);
53 MODULE_DESCRIPTION(CORE_DESC
);
54 MODULE_LICENSE("GPL and additional rights");
55 MODULE_PARM_DESC(debug
, "Enable debug output");
56 MODULE_PARM_DESC(vblankoffdelay
, "Delay until vblank irq auto-disable [msecs]");
57 MODULE_PARM_DESC(timestamp_precision_usec
, "Max. error on timestamps [usecs]");
58 MODULE_PARM_DESC(timestamp_monotonic
, "Use monotonic timestamps");
60 module_param_named(debug
, drm_debug
, int, 0600);
61 module_param_named(vblankoffdelay
, drm_vblank_offdelay
, int, 0600);
62 module_param_named(timestamp_precision_usec
, drm_timestamp_precision
, int, 0600);
63 module_param_named(timestamp_monotonic
, drm_timestamp_monotonic
, int, 0600);
65 static DEFINE_SPINLOCK(drm_minor_lock
);
66 static struct idr drm_minors_idr
;
68 struct class *drm_class
;
69 static struct dentry
*drm_debugfs_root
;
71 int drm_err(const char *func
, const char *format
, ...)
77 va_start(args
, format
);
82 r
= printk(KERN_ERR
"[" DRM_NAME
":%s] *ERROR* %pV", func
, &vaf
);
88 EXPORT_SYMBOL(drm_err
);
90 void drm_ut_debug_printk(const char *function_name
, const char *format
, ...)
95 va_start(args
, format
);
99 printk(KERN_DEBUG
"[" DRM_NAME
":%s] %pV", function_name
, &vaf
);
103 EXPORT_SYMBOL(drm_ut_debug_printk
);
105 struct drm_master
*drm_master_create(struct drm_minor
*minor
)
107 struct drm_master
*master
;
109 master
= kzalloc(sizeof(*master
), GFP_KERNEL
);
113 kref_init(&master
->refcount
);
114 spin_lock_init(&master
->lock
.spinlock
);
115 init_waitqueue_head(&master
->lock
.lock_queue
);
116 if (drm_ht_create(&master
->magiclist
, DRM_MAGIC_HASH_ORDER
)) {
120 INIT_LIST_HEAD(&master
->magicfree
);
121 master
->minor
= minor
;
126 struct drm_master
*drm_master_get(struct drm_master
*master
)
128 kref_get(&master
->refcount
);
131 EXPORT_SYMBOL(drm_master_get
);
133 static void drm_master_destroy(struct kref
*kref
)
135 struct drm_master
*master
= container_of(kref
, struct drm_master
, refcount
);
136 struct drm_magic_entry
*pt
, *next
;
137 struct drm_device
*dev
= master
->minor
->dev
;
138 struct drm_map_list
*r_list
, *list_temp
;
140 mutex_lock(&dev
->struct_mutex
);
141 if (dev
->driver
->master_destroy
)
142 dev
->driver
->master_destroy(dev
, master
);
144 list_for_each_entry_safe(r_list
, list_temp
, &dev
->maplist
, head
) {
145 if (r_list
->master
== master
) {
146 drm_rmmap_locked(dev
, r_list
->map
);
151 if (master
->unique
) {
152 kfree(master
->unique
);
153 master
->unique
= NULL
;
154 master
->unique_len
= 0;
157 list_for_each_entry_safe(pt
, next
, &master
->magicfree
, head
) {
159 drm_ht_remove_item(&master
->magiclist
, &pt
->hash_item
);
163 drm_ht_remove(&master
->magiclist
);
165 mutex_unlock(&dev
->struct_mutex
);
169 void drm_master_put(struct drm_master
**master
)
171 kref_put(&(*master
)->refcount
, drm_master_destroy
);
174 EXPORT_SYMBOL(drm_master_put
);
176 int drm_setmaster_ioctl(struct drm_device
*dev
, void *data
,
177 struct drm_file
*file_priv
)
181 mutex_lock(&dev
->master_mutex
);
182 if (file_priv
->is_master
)
185 if (file_priv
->minor
->master
) {
190 if (!file_priv
->master
) {
195 file_priv
->minor
->master
= drm_master_get(file_priv
->master
);
196 file_priv
->is_master
= 1;
197 if (dev
->driver
->master_set
) {
198 ret
= dev
->driver
->master_set(dev
, file_priv
, false);
199 if (unlikely(ret
!= 0)) {
200 file_priv
->is_master
= 0;
201 drm_master_put(&file_priv
->minor
->master
);
206 mutex_unlock(&dev
->master_mutex
);
210 int drm_dropmaster_ioctl(struct drm_device
*dev
, void *data
,
211 struct drm_file
*file_priv
)
215 mutex_lock(&dev
->master_mutex
);
216 if (!file_priv
->is_master
)
219 if (!file_priv
->minor
->master
)
223 if (dev
->driver
->master_drop
)
224 dev
->driver
->master_drop(dev
, file_priv
, false);
225 drm_master_put(&file_priv
->minor
->master
);
226 file_priv
->is_master
= 0;
229 mutex_unlock(&dev
->master_mutex
);
235 * A DRM device can provide several char-dev interfaces on the DRM-Major. Each
236 * of them is represented by a drm_minor object. Depending on the capabilities
237 * of the device-driver, different interfaces are registered.
239 * Minors can be accessed via dev->$minor_name. This pointer is either
240 * NULL or a valid drm_minor pointer and stays valid as long as the device is
241 * valid. This means, DRM minors have the same life-time as the underlying
242 * device. However, this doesn't mean that the minor is active. Minors are
243 * registered and unregistered dynamically according to device-state.
246 static struct drm_minor
**drm_minor_get_slot(struct drm_device
*dev
,
250 case DRM_MINOR_LEGACY
:
251 return &dev
->primary
;
252 case DRM_MINOR_RENDER
:
254 case DRM_MINOR_CONTROL
:
255 return &dev
->control
;
261 static int drm_minor_alloc(struct drm_device
*dev
, unsigned int type
)
263 struct drm_minor
*minor
;
267 minor
= kzalloc(sizeof(*minor
), GFP_KERNEL
);
274 idr_preload(GFP_KERNEL
);
275 spin_lock_irqsave(&drm_minor_lock
, flags
);
276 r
= idr_alloc(&drm_minors_idr
,
281 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
289 minor
->kdev
= drm_sysfs_minor_alloc(minor
);
290 if (IS_ERR(minor
->kdev
)) {
291 r
= PTR_ERR(minor
->kdev
);
295 *drm_minor_get_slot(dev
, type
) = minor
;
299 spin_lock_irqsave(&drm_minor_lock
, flags
);
300 idr_remove(&drm_minors_idr
, minor
->index
);
301 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
307 static void drm_minor_free(struct drm_device
*dev
, unsigned int type
)
309 struct drm_minor
**slot
, *minor
;
312 slot
= drm_minor_get_slot(dev
, type
);
317 drm_mode_group_destroy(&minor
->mode_group
);
318 put_device(minor
->kdev
);
320 spin_lock_irqsave(&drm_minor_lock
, flags
);
321 idr_remove(&drm_minors_idr
, minor
->index
);
322 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
328 static int drm_minor_register(struct drm_device
*dev
, unsigned int type
)
330 struct drm_minor
*minor
;
336 minor
= *drm_minor_get_slot(dev
, type
);
340 ret
= drm_debugfs_init(minor
, minor
->index
, drm_debugfs_root
);
342 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
346 ret
= device_add(minor
->kdev
);
350 /* replace NULL with @minor so lookups will succeed from now on */
351 spin_lock_irqsave(&drm_minor_lock
, flags
);
352 idr_replace(&drm_minors_idr
, minor
, minor
->index
);
353 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
355 DRM_DEBUG("new minor registered %d\n", minor
->index
);
359 drm_debugfs_cleanup(minor
);
363 static void drm_minor_unregister(struct drm_device
*dev
, unsigned int type
)
365 struct drm_minor
*minor
;
368 minor
= *drm_minor_get_slot(dev
, type
);
369 if (!minor
|| !device_is_registered(minor
->kdev
))
372 /* replace @minor with NULL so lookups will fail from now on */
373 spin_lock_irqsave(&drm_minor_lock
, flags
);
374 idr_replace(&drm_minors_idr
, NULL
, minor
->index
);
375 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
377 device_del(minor
->kdev
);
378 dev_set_drvdata(minor
->kdev
, NULL
); /* safety belt */
379 drm_debugfs_cleanup(minor
);
383 * drm_minor_acquire - Acquire a DRM minor
384 * @minor_id: Minor ID of the DRM-minor
386 * Looks up the given minor-ID and returns the respective DRM-minor object. The
387 * refence-count of the underlying device is increased so you must release this
388 * object with drm_minor_release().
390 * As long as you hold this minor, it is guaranteed that the object and the
391 * minor->dev pointer will stay valid! However, the device may get unplugged and
392 * unregistered while you hold the minor.
395 * Pointer to minor-object with increased device-refcount, or PTR_ERR on
398 struct drm_minor
*drm_minor_acquire(unsigned int minor_id
)
400 struct drm_minor
*minor
;
403 spin_lock_irqsave(&drm_minor_lock
, flags
);
404 minor
= idr_find(&drm_minors_idr
, minor_id
);
406 drm_dev_ref(minor
->dev
);
407 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
410 return ERR_PTR(-ENODEV
);
411 } else if (drm_device_is_unplugged(minor
->dev
)) {
412 drm_dev_unref(minor
->dev
);
413 return ERR_PTR(-ENODEV
);
420 * drm_minor_release - Release DRM minor
421 * @minor: Pointer to DRM minor object
423 * Release a minor that was previously acquired via drm_minor_acquire().
425 void drm_minor_release(struct drm_minor
*minor
)
427 drm_dev_unref(minor
->dev
);
431 * drm_put_dev - Unregister and release a DRM device
434 * Called at module unload time or when a PCI device is unplugged.
436 * Use of this function is discouraged. It will eventually go away completely.
437 * Please use drm_dev_unregister() and drm_dev_unref() explicitly instead.
439 * Cleans up all DRM device, calling drm_lastclose().
441 void drm_put_dev(struct drm_device
*dev
)
446 DRM_ERROR("cleanup called no dev\n");
450 drm_dev_unregister(dev
);
453 EXPORT_SYMBOL(drm_put_dev
);
455 void drm_unplug_dev(struct drm_device
*dev
)
457 /* for a USB device */
458 drm_minor_unregister(dev
, DRM_MINOR_LEGACY
);
459 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
460 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
462 mutex_lock(&drm_global_mutex
);
464 drm_device_set_unplugged(dev
);
466 if (dev
->open_count
== 0) {
469 mutex_unlock(&drm_global_mutex
);
471 EXPORT_SYMBOL(drm_unplug_dev
);
475 * We want to be able to allocate our own "struct address_space" to control
476 * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow
477 * stand-alone address_space objects, so we need an underlying inode. As there
478 * is no way to allocate an independent inode easily, we need a fake internal
481 * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free()
482 * frees it again. You are allowed to use iget() and iput() to get references to
483 * the inode. But each drm_fs_inode_new() call must be paired with exactly one
484 * drm_fs_inode_free() call (which does not have to be the last iput()).
485 * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it
486 * between multiple inode-users. You could, technically, call
487 * iget() + drm_fs_inode_free() directly after alloc and sometime later do an
488 * iput(), but this way you'd end up with a new vfsmount for each inode.
491 static int drm_fs_cnt
;
492 static struct vfsmount
*drm_fs_mnt
;
494 static const struct dentry_operations drm_fs_dops
= {
495 .d_dname
= simple_dname
,
498 static const struct super_operations drm_fs_sops
= {
499 .statfs
= simple_statfs
,
502 static struct dentry
*drm_fs_mount(struct file_system_type
*fs_type
, int flags
,
503 const char *dev_name
, void *data
)
505 return mount_pseudo(fs_type
,
512 static struct file_system_type drm_fs_type
= {
514 .owner
= THIS_MODULE
,
515 .mount
= drm_fs_mount
,
516 .kill_sb
= kill_anon_super
,
519 static struct inode
*drm_fs_inode_new(void)
524 r
= simple_pin_fs(&drm_fs_type
, &drm_fs_mnt
, &drm_fs_cnt
);
526 DRM_ERROR("Cannot mount pseudo fs: %d\n", r
);
530 inode
= alloc_anon_inode(drm_fs_mnt
->mnt_sb
);
532 simple_release_fs(&drm_fs_mnt
, &drm_fs_cnt
);
537 static void drm_fs_inode_free(struct inode
*inode
)
541 simple_release_fs(&drm_fs_mnt
, &drm_fs_cnt
);
546 * drm_dev_alloc - Allocate new DRM device
547 * @driver: DRM driver to allocate device for
548 * @parent: Parent device object
550 * Allocate and initialize a new DRM device. No device registration is done.
551 * Call drm_dev_register() to advertice the device to user space and register it
552 * with other core subsystems.
554 * The initial ref-count of the object is 1. Use drm_dev_ref() and
555 * drm_dev_unref() to take and drop further ref-counts.
558 * Pointer to new DRM device, or NULL if out of memory.
560 struct drm_device
*drm_dev_alloc(struct drm_driver
*driver
,
561 struct device
*parent
)
563 struct drm_device
*dev
;
566 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
570 kref_init(&dev
->ref
);
572 dev
->driver
= driver
;
574 INIT_LIST_HEAD(&dev
->filelist
);
575 INIT_LIST_HEAD(&dev
->ctxlist
);
576 INIT_LIST_HEAD(&dev
->vmalist
);
577 INIT_LIST_HEAD(&dev
->maplist
);
578 INIT_LIST_HEAD(&dev
->vblank_event_list
);
580 spin_lock_init(&dev
->buf_lock
);
581 spin_lock_init(&dev
->event_lock
);
582 mutex_init(&dev
->struct_mutex
);
583 mutex_init(&dev
->ctxlist_mutex
);
584 mutex_init(&dev
->master_mutex
);
586 dev
->anon_inode
= drm_fs_inode_new();
587 if (IS_ERR(dev
->anon_inode
)) {
588 ret
= PTR_ERR(dev
->anon_inode
);
589 DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret
);
593 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
594 ret
= drm_minor_alloc(dev
, DRM_MINOR_CONTROL
);
599 if (drm_core_check_feature(dev
, DRIVER_RENDER
)) {
600 ret
= drm_minor_alloc(dev
, DRM_MINOR_RENDER
);
605 ret
= drm_minor_alloc(dev
, DRM_MINOR_LEGACY
);
609 if (drm_ht_create(&dev
->map_hash
, 12))
612 ret
= drm_legacy_ctxbitmap_init(dev
);
614 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
618 if (driver
->driver_features
& DRIVER_GEM
) {
619 ret
= drm_gem_init(dev
);
621 DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
629 drm_legacy_ctxbitmap_cleanup(dev
);
631 drm_ht_remove(&dev
->map_hash
);
633 drm_minor_free(dev
, DRM_MINOR_LEGACY
);
634 drm_minor_free(dev
, DRM_MINOR_RENDER
);
635 drm_minor_free(dev
, DRM_MINOR_CONTROL
);
636 drm_fs_inode_free(dev
->anon_inode
);
638 mutex_destroy(&dev
->master_mutex
);
642 EXPORT_SYMBOL(drm_dev_alloc
);
644 static void drm_dev_release(struct kref
*ref
)
646 struct drm_device
*dev
= container_of(ref
, struct drm_device
, ref
);
648 if (dev
->driver
->driver_features
& DRIVER_GEM
)
649 drm_gem_destroy(dev
);
651 drm_legacy_ctxbitmap_cleanup(dev
);
652 drm_ht_remove(&dev
->map_hash
);
653 drm_fs_inode_free(dev
->anon_inode
);
655 drm_minor_free(dev
, DRM_MINOR_LEGACY
);
656 drm_minor_free(dev
, DRM_MINOR_RENDER
);
657 drm_minor_free(dev
, DRM_MINOR_CONTROL
);
659 mutex_destroy(&dev
->master_mutex
);
665 * drm_dev_ref - Take reference of a DRM device
666 * @dev: device to take reference of or NULL
668 * This increases the ref-count of @dev by one. You *must* already own a
669 * reference when calling this. Use drm_dev_unref() to drop this reference
672 * This function never fails. However, this function does not provide *any*
673 * guarantee whether the device is alive or running. It only provides a
674 * reference to the object and the memory associated with it.
676 void drm_dev_ref(struct drm_device
*dev
)
681 EXPORT_SYMBOL(drm_dev_ref
);
684 * drm_dev_unref - Drop reference of a DRM device
685 * @dev: device to drop reference of or NULL
687 * This decreases the ref-count of @dev by one. The device is destroyed if the
688 * ref-count drops to zero.
690 void drm_dev_unref(struct drm_device
*dev
)
693 kref_put(&dev
->ref
, drm_dev_release
);
695 EXPORT_SYMBOL(drm_dev_unref
);
698 * drm_dev_register - Register DRM device
699 * @dev: Device to register
700 * @flags: Flags passed to the driver's .load() function
702 * Register the DRM device @dev with the system, advertise device to user-space
703 * and start normal device operation. @dev must be allocated via drm_dev_alloc()
706 * Never call this twice on any device!
709 * 0 on success, negative error code on failure.
711 int drm_dev_register(struct drm_device
*dev
, unsigned long flags
)
715 mutex_lock(&drm_global_mutex
);
717 ret
= drm_minor_register(dev
, DRM_MINOR_CONTROL
);
721 ret
= drm_minor_register(dev
, DRM_MINOR_RENDER
);
725 ret
= drm_minor_register(dev
, DRM_MINOR_LEGACY
);
729 if (dev
->driver
->load
) {
730 ret
= dev
->driver
->load(dev
, flags
);
735 /* setup grouping for legacy outputs */
736 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
737 ret
= drm_mode_group_init_legacy_group(dev
,
738 &dev
->primary
->mode_group
);
747 if (dev
->driver
->unload
)
748 dev
->driver
->unload(dev
);
750 drm_minor_unregister(dev
, DRM_MINOR_LEGACY
);
751 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
752 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
754 mutex_unlock(&drm_global_mutex
);
757 EXPORT_SYMBOL(drm_dev_register
);
760 * drm_dev_unregister - Unregister DRM device
761 * @dev: Device to unregister
763 * Unregister the DRM device from the system. This does the reverse of
764 * drm_dev_register() but does not deallocate the device. The caller must call
765 * drm_dev_unref() to drop their final reference.
767 void drm_dev_unregister(struct drm_device
*dev
)
769 struct drm_map_list
*r_list
, *list_temp
;
773 if (dev
->driver
->unload
)
774 dev
->driver
->unload(dev
);
777 drm_pci_agp_destroy(dev
);
779 drm_vblank_cleanup(dev
);
781 list_for_each_entry_safe(r_list
, list_temp
, &dev
->maplist
, head
)
782 drm_rmmap(dev
, r_list
->map
);
784 drm_minor_unregister(dev
, DRM_MINOR_LEGACY
);
785 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
786 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
788 EXPORT_SYMBOL(drm_dev_unregister
);
791 * drm_dev_set_unique - Set the unique name of a DRM device
792 * @dev: device of which to set the unique name
793 * @fmt: format string for unique name
795 * Sets the unique name of a DRM device using the specified format string and
796 * a variable list of arguments. Drivers can use this at driver probe time if
797 * the unique name of the devices they drive is static.
799 * Return: 0 on success or a negative error code on failure.
801 int drm_dev_set_unique(struct drm_device
*dev
, const char *fmt
, ...)
808 dev
->unique
= kvasprintf(GFP_KERNEL
, fmt
, ap
);
811 return dev
->unique
? 0 : -ENOMEM
;
813 EXPORT_SYMBOL(drm_dev_set_unique
);
817 * The DRM core module initializes all global DRM objects and makes them
818 * available to drivers. Once setup, drivers can probe their respective
820 * Currently, core management includes:
821 * - The "DRM-Global" key/value database
822 * - Global ID management for connectors
823 * - DRM major number allocation
824 * - DRM minor management
828 * Furthermore, the DRM core provides dynamic char-dev lookups. For each
829 * interface registered on a DRM device, you can request minor numbers from DRM
830 * core. DRM core takes care of major-number management and char-dev
831 * registration. A stub ->open() callback forwards any open() requests to the
835 static int drm_stub_open(struct inode
*inode
, struct file
*filp
)
837 const struct file_operations
*new_fops
;
838 struct drm_minor
*minor
;
843 mutex_lock(&drm_global_mutex
);
844 minor
= drm_minor_acquire(iminor(inode
));
846 err
= PTR_ERR(minor
);
850 new_fops
= fops_get(minor
->dev
->driver
->fops
);
856 replace_fops(filp
, new_fops
);
857 if (filp
->f_op
->open
)
858 err
= filp
->f_op
->open(inode
, filp
);
863 drm_minor_release(minor
);
865 mutex_unlock(&drm_global_mutex
);
869 static const struct file_operations drm_stub_fops
= {
870 .owner
= THIS_MODULE
,
871 .open
= drm_stub_open
,
872 .llseek
= noop_llseek
,
875 static int __init
drm_core_init(void)
880 drm_connector_ida_init();
881 idr_init(&drm_minors_idr
);
883 if (register_chrdev(DRM_MAJOR
, "drm", &drm_stub_fops
))
886 drm_class
= drm_sysfs_create(THIS_MODULE
, "drm");
887 if (IS_ERR(drm_class
)) {
888 printk(KERN_ERR
"DRM: Error creating drm class.\n");
889 ret
= PTR_ERR(drm_class
);
893 drm_debugfs_root
= debugfs_create_dir("dri", NULL
);
894 if (!drm_debugfs_root
) {
895 DRM_ERROR("Cannot create /sys/kernel/debug/dri\n");
900 DRM_INFO("Initialized %s %d.%d.%d %s\n",
901 CORE_NAME
, CORE_MAJOR
, CORE_MINOR
, CORE_PATCHLEVEL
, CORE_DATE
);
906 unregister_chrdev(DRM_MAJOR
, "drm");
908 idr_destroy(&drm_minors_idr
);
913 static void __exit
drm_core_exit(void)
915 debugfs_remove(drm_debugfs_root
);
918 unregister_chrdev(DRM_MAJOR
, "drm");
920 drm_connector_ida_destroy();
921 idr_destroy(&drm_minors_idr
);
924 module_init(drm_core_init
);
925 module_exit(drm_core_exit
);