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_crtc_internal.h"
38 #include "drm_legacy.h"
39 #include "drm_internal.h"
40 #include "drm_crtc_internal.h"
43 * drm_debug: Enable debug output.
44 * Bitmask of DRM_UT_x. See include/drm/drmP.h for details.
46 unsigned int drm_debug
= 0;
47 EXPORT_SYMBOL(drm_debug
);
49 MODULE_AUTHOR(CORE_AUTHOR
);
50 MODULE_DESCRIPTION(CORE_DESC
);
51 MODULE_LICENSE("GPL and additional rights");
52 MODULE_PARM_DESC(debug
, "Enable debug output, where each bit enables a debug category.\n"
53 "\t\tBit 0 (0x01) will enable CORE messages (drm core code)\n"
54 "\t\tBit 1 (0x02) will enable DRIVER messages (drm controller code)\n"
55 "\t\tBit 2 (0x04) will enable KMS messages (modesetting code)\n"
56 "\t\tBit 3 (0x08) will enable PRIME messages (prime code)\n"
57 "\t\tBit 4 (0x10) will enable ATOMIC messages (atomic code)\n"
58 "\t\tBit 5 (0x20) will enable VBL messages (vblank code)");
59 module_param_named(debug
, drm_debug
, int, 0600);
61 static DEFINE_SPINLOCK(drm_minor_lock
);
62 static struct idr drm_minors_idr
;
64 static struct dentry
*drm_debugfs_root
;
66 #define DRM_PRINTK_FMT "[" DRM_NAME ":%s]%s %pV"
68 void drm_dev_printk(const struct device
*dev
, const char *level
,
69 unsigned int category
, const char *function_name
,
70 const char *prefix
, const char *format
, ...)
75 if (category
!= DRM_UT_NONE
&& !(drm_debug
& category
))
78 va_start(args
, format
);
83 dev_printk(level
, dev
, DRM_PRINTK_FMT
, function_name
, prefix
,
86 printk("%s" DRM_PRINTK_FMT
, level
, function_name
, prefix
, &vaf
);
90 EXPORT_SYMBOL(drm_dev_printk
);
92 void drm_printk(const char *level
, unsigned int category
,
93 const char *function_name
, const char *prefix
,
94 const char *format
, ...)
99 if (category
!= DRM_UT_NONE
&& !(drm_debug
& category
))
102 va_start(args
, format
);
106 printk("%s" DRM_PRINTK_FMT
, level
, function_name
, prefix
, &vaf
);
110 EXPORT_SYMBOL(drm_printk
);
114 * A DRM device can provide several char-dev interfaces on the DRM-Major. Each
115 * of them is represented by a drm_minor object. Depending on the capabilities
116 * of the device-driver, different interfaces are registered.
118 * Minors can be accessed via dev->$minor_name. This pointer is either
119 * NULL or a valid drm_minor pointer and stays valid as long as the device is
120 * valid. This means, DRM minors have the same life-time as the underlying
121 * device. However, this doesn't mean that the minor is active. Minors are
122 * registered and unregistered dynamically according to device-state.
125 static struct drm_minor
**drm_minor_get_slot(struct drm_device
*dev
,
129 case DRM_MINOR_PRIMARY
:
130 return &dev
->primary
;
131 case DRM_MINOR_RENDER
:
133 case DRM_MINOR_CONTROL
:
134 return &dev
->control
;
140 static int drm_minor_alloc(struct drm_device
*dev
, unsigned int type
)
142 struct drm_minor
*minor
;
146 minor
= kzalloc(sizeof(*minor
), GFP_KERNEL
);
153 idr_preload(GFP_KERNEL
);
154 spin_lock_irqsave(&drm_minor_lock
, flags
);
155 r
= idr_alloc(&drm_minors_idr
,
160 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
168 minor
->kdev
= drm_sysfs_minor_alloc(minor
);
169 if (IS_ERR(minor
->kdev
)) {
170 r
= PTR_ERR(minor
->kdev
);
174 *drm_minor_get_slot(dev
, type
) = minor
;
178 spin_lock_irqsave(&drm_minor_lock
, flags
);
179 idr_remove(&drm_minors_idr
, minor
->index
);
180 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
186 static void drm_minor_free(struct drm_device
*dev
, unsigned int type
)
188 struct drm_minor
**slot
, *minor
;
191 slot
= drm_minor_get_slot(dev
, type
);
196 put_device(minor
->kdev
);
198 spin_lock_irqsave(&drm_minor_lock
, flags
);
199 idr_remove(&drm_minors_idr
, minor
->index
);
200 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
206 static int drm_minor_register(struct drm_device
*dev
, unsigned int type
)
208 struct drm_minor
*minor
;
214 minor
= *drm_minor_get_slot(dev
, type
);
218 ret
= drm_debugfs_init(minor
, minor
->index
, drm_debugfs_root
);
220 DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n");
224 ret
= device_add(minor
->kdev
);
228 /* replace NULL with @minor so lookups will succeed from now on */
229 spin_lock_irqsave(&drm_minor_lock
, flags
);
230 idr_replace(&drm_minors_idr
, minor
, minor
->index
);
231 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
233 DRM_DEBUG("new minor registered %d\n", minor
->index
);
237 drm_debugfs_cleanup(minor
);
241 static void drm_minor_unregister(struct drm_device
*dev
, unsigned int type
)
243 struct drm_minor
*minor
;
246 minor
= *drm_minor_get_slot(dev
, type
);
247 if (!minor
|| !device_is_registered(minor
->kdev
))
250 /* replace @minor with NULL so lookups will fail from now on */
251 spin_lock_irqsave(&drm_minor_lock
, flags
);
252 idr_replace(&drm_minors_idr
, NULL
, minor
->index
);
253 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
255 device_del(minor
->kdev
);
256 dev_set_drvdata(minor
->kdev
, NULL
); /* safety belt */
257 drm_debugfs_cleanup(minor
);
261 * drm_minor_acquire - Acquire a DRM minor
262 * @minor_id: Minor ID of the DRM-minor
264 * Looks up the given minor-ID and returns the respective DRM-minor object. The
265 * refence-count of the underlying device is increased so you must release this
266 * object with drm_minor_release().
268 * As long as you hold this minor, it is guaranteed that the object and the
269 * minor->dev pointer will stay valid! However, the device may get unplugged and
270 * unregistered while you hold the minor.
273 * Pointer to minor-object with increased device-refcount, or PTR_ERR on
276 struct drm_minor
*drm_minor_acquire(unsigned int minor_id
)
278 struct drm_minor
*minor
;
281 spin_lock_irqsave(&drm_minor_lock
, flags
);
282 minor
= idr_find(&drm_minors_idr
, minor_id
);
284 drm_dev_ref(minor
->dev
);
285 spin_unlock_irqrestore(&drm_minor_lock
, flags
);
288 return ERR_PTR(-ENODEV
);
289 } else if (drm_device_is_unplugged(minor
->dev
)) {
290 drm_dev_unref(minor
->dev
);
291 return ERR_PTR(-ENODEV
);
298 * drm_minor_release - Release DRM minor
299 * @minor: Pointer to DRM minor object
301 * Release a minor that was previously acquired via drm_minor_acquire().
303 void drm_minor_release(struct drm_minor
*minor
)
305 drm_dev_unref(minor
->dev
);
309 * DOC: driver instance overview
311 * A device instance for a drm driver is represented by struct &drm_device. This
312 * is allocated with drm_dev_alloc(), usually from bus-specific ->probe()
313 * callbacks implemented by the driver. The driver then needs to initialize all
314 * the various subsystems for the drm device like memory management, vblank
315 * handling, modesetting support and intial output configuration plus obviously
316 * initialize all the corresponding hardware bits. Finally when everything is up
317 * and running and ready for userspace the device instance can be published
318 * using drm_dev_register().
320 * There is also deprecated support for initalizing device instances using
321 * bus-specific helpers and the ->load() callback. But due to
322 * backwards-compatibility needs the device instance have to be published too
323 * early, which requires unpretty global locking to make safe and is therefore
324 * only support for existing drivers not yet converted to the new scheme.
326 * When cleaning up a device instance everything needs to be done in reverse:
327 * First unpublish the device instance with drm_dev_unregister(). Then clean up
328 * any other resources allocated at device initialization and drop the driver's
329 * reference to &drm_device using drm_dev_unref().
331 * Note that the lifetime rules for &drm_device instance has still a lot of
332 * historical baggage. Hence use the reference counting provided by
333 * drm_dev_ref() and drm_dev_unref() only carefully.
335 * Also note that embedding of &drm_device is currently not (yet) supported (but
336 * it would be easy to add). Drivers can store driver-private data in the
337 * dev_priv field of &drm_device.
340 static int drm_dev_set_unique(struct drm_device
*dev
, const char *name
)
343 dev
->unique
= kstrdup(name
, GFP_KERNEL
);
345 return dev
->unique
? 0 : -ENOMEM
;
349 * drm_put_dev - Unregister and release a DRM device
352 * Called at module unload time or when a PCI device is unplugged.
354 * Cleans up all DRM device, calling drm_lastclose().
356 * Note: Use of this function is deprecated. It will eventually go away
357 * completely. Please use drm_dev_unregister() and drm_dev_unref() explicitly
358 * instead to make sure that the device isn't userspace accessible any more
359 * while teardown is in progress, ensuring that userspace can't access an
360 * inconsistent state.
362 void drm_put_dev(struct drm_device
*dev
)
367 DRM_ERROR("cleanup called no dev\n");
371 drm_dev_unregister(dev
);
374 EXPORT_SYMBOL(drm_put_dev
);
376 void drm_unplug_dev(struct drm_device
*dev
)
378 /* for a USB device */
379 drm_dev_unregister(dev
);
381 mutex_lock(&drm_global_mutex
);
383 drm_device_set_unplugged(dev
);
385 if (dev
->open_count
== 0) {
388 mutex_unlock(&drm_global_mutex
);
390 EXPORT_SYMBOL(drm_unplug_dev
);
394 * We want to be able to allocate our own "struct address_space" to control
395 * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow
396 * stand-alone address_space objects, so we need an underlying inode. As there
397 * is no way to allocate an independent inode easily, we need a fake internal
400 * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free()
401 * frees it again. You are allowed to use iget() and iput() to get references to
402 * the inode. But each drm_fs_inode_new() call must be paired with exactly one
403 * drm_fs_inode_free() call (which does not have to be the last iput()).
404 * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it
405 * between multiple inode-users. You could, technically, call
406 * iget() + drm_fs_inode_free() directly after alloc and sometime later do an
407 * iput(), but this way you'd end up with a new vfsmount for each inode.
410 static int drm_fs_cnt
;
411 static struct vfsmount
*drm_fs_mnt
;
413 static const struct dentry_operations drm_fs_dops
= {
414 .d_dname
= simple_dname
,
417 static const struct super_operations drm_fs_sops
= {
418 .statfs
= simple_statfs
,
421 static struct dentry
*drm_fs_mount(struct file_system_type
*fs_type
, int flags
,
422 const char *dev_name
, void *data
)
424 return mount_pseudo(fs_type
,
431 static struct file_system_type drm_fs_type
= {
433 .owner
= THIS_MODULE
,
434 .mount
= drm_fs_mount
,
435 .kill_sb
= kill_anon_super
,
438 static struct inode
*drm_fs_inode_new(void)
443 r
= simple_pin_fs(&drm_fs_type
, &drm_fs_mnt
, &drm_fs_cnt
);
445 DRM_ERROR("Cannot mount pseudo fs: %d\n", r
);
449 inode
= alloc_anon_inode(drm_fs_mnt
->mnt_sb
);
451 simple_release_fs(&drm_fs_mnt
, &drm_fs_cnt
);
456 static void drm_fs_inode_free(struct inode
*inode
)
460 simple_release_fs(&drm_fs_mnt
, &drm_fs_cnt
);
465 * drm_dev_init - Initialise new DRM device
467 * @driver: DRM driver
468 * @parent: Parent device object
470 * Initialize a new DRM device. No device registration is done.
471 * Call drm_dev_register() to advertice the device to user space and register it
472 * with other core subsystems. This should be done last in the device
473 * initialization sequence to make sure userspace can't access an inconsistent
476 * The initial ref-count of the object is 1. Use drm_dev_ref() and
477 * drm_dev_unref() to take and drop further ref-counts.
479 * Note that for purely virtual devices @parent can be NULL.
481 * Drivers that do not want to allocate their own device struct
482 * embedding struct &drm_device can call drm_dev_alloc() instead.
485 * 0 on success, or error code on failure.
487 int drm_dev_init(struct drm_device
*dev
,
488 struct drm_driver
*driver
,
489 struct device
*parent
)
493 kref_init(&dev
->ref
);
495 dev
->driver
= driver
;
497 INIT_LIST_HEAD(&dev
->filelist
);
498 INIT_LIST_HEAD(&dev
->ctxlist
);
499 INIT_LIST_HEAD(&dev
->vmalist
);
500 INIT_LIST_HEAD(&dev
->maplist
);
501 INIT_LIST_HEAD(&dev
->vblank_event_list
);
503 spin_lock_init(&dev
->buf_lock
);
504 spin_lock_init(&dev
->event_lock
);
505 mutex_init(&dev
->struct_mutex
);
506 mutex_init(&dev
->filelist_mutex
);
507 mutex_init(&dev
->ctxlist_mutex
);
508 mutex_init(&dev
->master_mutex
);
510 dev
->anon_inode
= drm_fs_inode_new();
511 if (IS_ERR(dev
->anon_inode
)) {
512 ret
= PTR_ERR(dev
->anon_inode
);
513 DRM_ERROR("Cannot allocate anonymous inode: %d\n", ret
);
517 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
518 ret
= drm_minor_alloc(dev
, DRM_MINOR_CONTROL
);
523 if (drm_core_check_feature(dev
, DRIVER_RENDER
)) {
524 ret
= drm_minor_alloc(dev
, DRM_MINOR_RENDER
);
529 ret
= drm_minor_alloc(dev
, DRM_MINOR_PRIMARY
);
533 ret
= drm_ht_create(&dev
->map_hash
, 12);
537 drm_legacy_ctxbitmap_init(dev
);
539 if (drm_core_check_feature(dev
, DRIVER_GEM
)) {
540 ret
= drm_gem_init(dev
);
542 DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n");
547 /* Use the parent device name as DRM device unique identifier, but fall
548 * back to the driver name for virtual devices like vgem. */
549 ret
= drm_dev_set_unique(dev
, parent
? dev_name(parent
) : driver
->name
);
556 if (drm_core_check_feature(dev
, DRIVER_GEM
))
557 drm_gem_destroy(dev
);
559 drm_legacy_ctxbitmap_cleanup(dev
);
560 drm_ht_remove(&dev
->map_hash
);
562 drm_minor_free(dev
, DRM_MINOR_PRIMARY
);
563 drm_minor_free(dev
, DRM_MINOR_RENDER
);
564 drm_minor_free(dev
, DRM_MINOR_CONTROL
);
565 drm_fs_inode_free(dev
->anon_inode
);
567 mutex_destroy(&dev
->master_mutex
);
570 EXPORT_SYMBOL(drm_dev_init
);
573 * drm_dev_alloc - Allocate new DRM device
574 * @driver: DRM driver to allocate device for
575 * @parent: Parent device object
577 * Allocate and initialize a new DRM device. No device registration is done.
578 * Call drm_dev_register() to advertice the device to user space and register it
579 * with other core subsystems. This should be done last in the device
580 * initialization sequence to make sure userspace can't access an inconsistent
583 * The initial ref-count of the object is 1. Use drm_dev_ref() and
584 * drm_dev_unref() to take and drop further ref-counts.
586 * Note that for purely virtual devices @parent can be NULL.
588 * Drivers that wish to subclass or embed struct &drm_device into their
589 * own struct should look at using drm_dev_init() instead.
592 * Pointer to new DRM device, or NULL if out of memory.
594 struct drm_device
*drm_dev_alloc(struct drm_driver
*driver
,
595 struct device
*parent
)
597 struct drm_device
*dev
;
600 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
604 ret
= drm_dev_init(dev
, driver
, parent
);
612 EXPORT_SYMBOL(drm_dev_alloc
);
614 static void drm_dev_release(struct kref
*ref
)
616 struct drm_device
*dev
= container_of(ref
, struct drm_device
, ref
);
618 if (drm_core_check_feature(dev
, DRIVER_GEM
))
619 drm_gem_destroy(dev
);
621 drm_legacy_ctxbitmap_cleanup(dev
);
622 drm_ht_remove(&dev
->map_hash
);
623 drm_fs_inode_free(dev
->anon_inode
);
625 drm_minor_free(dev
, DRM_MINOR_PRIMARY
);
626 drm_minor_free(dev
, DRM_MINOR_RENDER
);
627 drm_minor_free(dev
, DRM_MINOR_CONTROL
);
629 mutex_destroy(&dev
->master_mutex
);
635 * drm_dev_ref - Take reference of a DRM device
636 * @dev: device to take reference of or NULL
638 * This increases the ref-count of @dev by one. You *must* already own a
639 * reference when calling this. Use drm_dev_unref() to drop this reference
642 * This function never fails. However, this function does not provide *any*
643 * guarantee whether the device is alive or running. It only provides a
644 * reference to the object and the memory associated with it.
646 void drm_dev_ref(struct drm_device
*dev
)
651 EXPORT_SYMBOL(drm_dev_ref
);
654 * drm_dev_unref - Drop reference of a DRM device
655 * @dev: device to drop reference of or NULL
657 * This decreases the ref-count of @dev by one. The device is destroyed if the
658 * ref-count drops to zero.
660 void drm_dev_unref(struct drm_device
*dev
)
663 kref_put(&dev
->ref
, drm_dev_release
);
665 EXPORT_SYMBOL(drm_dev_unref
);
668 * drm_dev_register - Register DRM device
669 * @dev: Device to register
670 * @flags: Flags passed to the driver's .load() function
672 * Register the DRM device @dev with the system, advertise device to user-space
673 * and start normal device operation. @dev must be allocated via drm_dev_alloc()
676 * Never call this twice on any device!
678 * NOTE: To ensure backward compatibility with existing drivers method this
679 * function calls the ->load() method after registering the device nodes,
680 * creating race conditions. Usage of the ->load() methods is therefore
681 * deprecated, drivers must perform all initialization before calling
682 * drm_dev_register().
685 * 0 on success, negative error code on failure.
687 int drm_dev_register(struct drm_device
*dev
, unsigned long flags
)
691 mutex_lock(&drm_global_mutex
);
693 ret
= drm_minor_register(dev
, DRM_MINOR_CONTROL
);
697 ret
= drm_minor_register(dev
, DRM_MINOR_RENDER
);
701 ret
= drm_minor_register(dev
, DRM_MINOR_PRIMARY
);
705 if (dev
->driver
->load
) {
706 ret
= dev
->driver
->load(dev
, flags
);
711 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
712 drm_modeset_register_all(dev
);
718 drm_minor_unregister(dev
, DRM_MINOR_PRIMARY
);
719 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
720 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
722 mutex_unlock(&drm_global_mutex
);
725 EXPORT_SYMBOL(drm_dev_register
);
728 * drm_dev_unregister - Unregister DRM device
729 * @dev: Device to unregister
731 * Unregister the DRM device from the system. This does the reverse of
732 * drm_dev_register() but does not deallocate the device. The caller must call
733 * drm_dev_unref() to drop their final reference.
735 * This should be called first in the device teardown code to make sure
736 * userspace can't access the device instance any more.
738 void drm_dev_unregister(struct drm_device
*dev
)
740 struct drm_map_list
*r_list
, *list_temp
;
744 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
745 drm_modeset_unregister_all(dev
);
747 if (dev
->driver
->unload
)
748 dev
->driver
->unload(dev
);
751 drm_pci_agp_destroy(dev
);
753 drm_vblank_cleanup(dev
);
755 list_for_each_entry_safe(r_list
, list_temp
, &dev
->maplist
, head
)
756 drm_legacy_rmmap(dev
, r_list
->map
);
758 drm_minor_unregister(dev
, DRM_MINOR_PRIMARY
);
759 drm_minor_unregister(dev
, DRM_MINOR_RENDER
);
760 drm_minor_unregister(dev
, DRM_MINOR_CONTROL
);
762 EXPORT_SYMBOL(drm_dev_unregister
);
766 * The DRM core module initializes all global DRM objects and makes them
767 * available to drivers. Once setup, drivers can probe their respective
769 * Currently, core management includes:
770 * - The "DRM-Global" key/value database
771 * - Global ID management for connectors
772 * - DRM major number allocation
773 * - DRM minor management
777 * Furthermore, the DRM core provides dynamic char-dev lookups. For each
778 * interface registered on a DRM device, you can request minor numbers from DRM
779 * core. DRM core takes care of major-number management and char-dev
780 * registration. A stub ->open() callback forwards any open() requests to the
784 static int drm_stub_open(struct inode
*inode
, struct file
*filp
)
786 const struct file_operations
*new_fops
;
787 struct drm_minor
*minor
;
792 mutex_lock(&drm_global_mutex
);
793 minor
= drm_minor_acquire(iminor(inode
));
795 err
= PTR_ERR(minor
);
799 new_fops
= fops_get(minor
->dev
->driver
->fops
);
805 replace_fops(filp
, new_fops
);
806 if (filp
->f_op
->open
)
807 err
= filp
->f_op
->open(inode
, filp
);
812 drm_minor_release(minor
);
814 mutex_unlock(&drm_global_mutex
);
818 static const struct file_operations drm_stub_fops
= {
819 .owner
= THIS_MODULE
,
820 .open
= drm_stub_open
,
821 .llseek
= noop_llseek
,
824 static int __init
drm_core_init(void)
829 drm_connector_ida_init();
830 idr_init(&drm_minors_idr
);
832 if (register_chrdev(DRM_MAJOR
, "drm", &drm_stub_fops
))
835 ret
= drm_sysfs_init();
837 printk(KERN_ERR
"DRM: Error creating drm class.\n");
841 drm_debugfs_root
= debugfs_create_dir("dri", NULL
);
842 if (!drm_debugfs_root
) {
843 DRM_ERROR("Cannot create /sys/kernel/debug/dri\n");
848 DRM_INFO("Initialized %s %d.%d.%d %s\n",
849 CORE_NAME
, CORE_MAJOR
, CORE_MINOR
, CORE_PATCHLEVEL
, CORE_DATE
);
854 unregister_chrdev(DRM_MAJOR
, "drm");
856 idr_destroy(&drm_minors_idr
);
861 static void __exit
drm_core_exit(void)
863 debugfs_remove(drm_debugfs_root
);
866 unregister_chrdev(DRM_MAJOR
, "drm");
868 drm_connector_ida_destroy();
869 idr_destroy(&drm_minors_idr
);
872 module_init(drm_core_init
);
873 module_exit(drm_core_exit
);