2 * Internal Header for the Direct Rendering Manager
4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
6 * Copyright (c) 2009-2010, Code Aurora Forum.
9 * Author: Rickard E. (Rik) Faith <faith@valinux.com>
10 * Author: Gareth Hughes <gareth@valinux.com>
12 * Permission is hereby granted, free of charge, to any person obtaining a
13 * copy of this software and associated documentation files (the "Software"),
14 * to deal in the Software without restriction, including without limitation
15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 * and/or sell copies of the Software, and to permit persons to whom the
17 * Software is furnished to do so, subject to the following conditions:
19 * The above copyright notice and this permission notice (including the next
20 * paragraph) shall be included in all copies or substantial portions of the
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
26 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
27 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
28 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
29 * OTHER DEALINGS IN THE SOFTWARE.
35 #include <linux/agp_backend.h>
36 #include <linux/cdev.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/file.h>
40 #include <linux/highmem.h>
41 #include <linux/idr.h>
42 #include <linux/init.h>
44 #include <linux/jiffies.h>
45 #include <linux/kernel.h>
46 #include <linux/kref.h>
47 #include <linux/miscdevice.h>
49 #include <linux/mutex.h>
50 #include <linux/pci.h>
51 #include <linux/platform_device.h>
52 #include <linux/poll.h>
53 #include <linux/ratelimit.h>
54 #include <linux/sched.h>
55 #include <linux/slab.h>
56 #include <linux/types.h>
57 #include <linux/vmalloc.h>
58 #include <linux/workqueue.h>
61 #include <asm/pgalloc.h>
62 #include <asm/uaccess.h>
64 #include <uapi/drm/drm.h>
65 #include <uapi/drm/drm_mode.h>
67 #include <drm/drm_agpsupport.h>
68 #include <drm/drm_crtc.h>
69 #include <drm/drm_global.h>
70 #include <drm/drm_hashtab.h>
71 #include <drm/drm_mem_util.h>
72 #include <drm/drm_mm.h>
73 #include <drm/drm_os_linux.h>
74 #include <drm/drm_sarea.h>
75 #include <drm/drm_vma_manager.h>
85 struct reservation_object;
88 * 4 debug categories are defined:
90 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
91 * This is the category used by the DRM_DEBUG() macro.
93 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
94 * This is the category used by the DRM_DEBUG_DRIVER() macro.
96 * KMS: used in the modesetting code.
97 * This is the category used by the DRM_DEBUG_KMS() macro.
99 * PRIME: used in the prime code.
100 * This is the category used by the DRM_DEBUG_PRIME() macro.
102 * Enabling verbose debug messages is done through the drm.debug parameter,
103 * each category being enabled by a bit.
105 * drm.debug=0x1 will enable CORE messages
106 * drm.debug=0x2 will enable DRIVER messages
107 * drm.debug=0x3 will enable CORE and DRIVER messages
109 * drm.debug=0xf will enable all messages
111 * An interesting feature is that it's possible to enable verbose logging at
112 * run-time by echoing the debug value in its sysfs node:
113 * # echo 0xf > /sys/module/drm/parameters/debug
115 #define DRM_UT_CORE 0x01
116 #define DRM_UT_DRIVER 0x02
117 #define DRM_UT_KMS 0x04
118 #define DRM_UT_PRIME 0x08
120 extern __printf(2, 3)
121 void drm_ut_debug_printk(const char *function_name,
122 const char *format, ...);
123 extern __printf(2, 3)
124 int drm_err(const char *func, const char *format, ...);
126 /***********************************************************************/
127 /** \name DRM template customization defaults */
130 /* driver capabilities and requirements mask */
131 #define DRIVER_USE_AGP 0x1
132 #define DRIVER_PCI_DMA 0x8
133 #define DRIVER_SG 0x10
134 #define DRIVER_HAVE_DMA 0x20
135 #define DRIVER_HAVE_IRQ 0x40
136 #define DRIVER_IRQ_SHARED 0x80
137 #define DRIVER_GEM 0x1000
138 #define DRIVER_MODESET 0x2000
139 #define DRIVER_PRIME 0x4000
140 #define DRIVER_RENDER 0x8000
142 /***********************************************************************/
143 /** \name Begin the DRM... */
146 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
150 /***********************************************************************/
151 /** \name Macros to make printk easier */
157 * \param fmt printf() like format string.
158 * \param arg arguments
160 #define DRM_ERROR(fmt, ...) \
161 drm_err(__func__, fmt, ##__VA_ARGS__)
164 * Rate limited error output. Like DRM_ERROR() but won't flood the log.
166 * \param fmt printf() like format string.
167 * \param arg arguments
169 #define DRM_ERROR_RATELIMITED(fmt, ...) \
171 static DEFINE_RATELIMIT_STATE(_rs, \
172 DEFAULT_RATELIMIT_INTERVAL, \
173 DEFAULT_RATELIMIT_BURST); \
175 if (__ratelimit(&_rs)) \
176 drm_err(__func__, fmt, ##__VA_ARGS__); \
179 #define DRM_INFO(fmt, ...) \
180 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
182 #define DRM_INFO_ONCE(fmt, ...) \
183 printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
188 * \param fmt printf() like format string.
189 * \param arg arguments
191 #define DRM_DEBUG(fmt, args...) \
193 if (unlikely(drm_debug & DRM_UT_CORE)) \
194 drm_ut_debug_printk(__func__, fmt, ##args); \
197 #define DRM_DEBUG_DRIVER(fmt, args...) \
199 if (unlikely(drm_debug & DRM_UT_DRIVER)) \
200 drm_ut_debug_printk(__func__, fmt, ##args); \
202 #define DRM_DEBUG_KMS(fmt, args...) \
204 if (unlikely(drm_debug & DRM_UT_KMS)) \
205 drm_ut_debug_printk(__func__, fmt, ##args); \
207 #define DRM_DEBUG_PRIME(fmt, args...) \
209 if (unlikely(drm_debug & DRM_UT_PRIME)) \
210 drm_ut_debug_printk(__func__, fmt, ##args); \
215 /***********************************************************************/
216 /** \name Internal types and structures */
219 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
222 * Test that the hardware lock is held by the caller, returning otherwise.
224 * \param dev DRM device.
225 * \param filp file pointer of the caller.
227 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
229 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
230 _file_priv->master->lock.file_priv != _file_priv) { \
231 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
232 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
233 _file_priv->master->lock.file_priv, _file_priv); \
239 * Ioctl function type.
241 * \param inode device inode.
242 * \param file_priv DRM file private pointer.
243 * \param cmd command.
244 * \param arg argument.
246 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
247 struct drm_file *file_priv);
249 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
252 #define DRM_IOCTL_NR(n) _IOC_NR(n)
253 #define DRM_MAJOR 226
256 #define DRM_MASTER 0x2
257 #define DRM_ROOT_ONLY 0x4
258 #define DRM_CONTROL_ALLOW 0x8
259 #define DRM_UNLOCKED 0x10
260 #define DRM_RENDER_ALLOW 0x20
262 struct drm_ioctl_desc {
266 unsigned int cmd_drv;
271 * Creates a driver or general drm_ioctl_desc array entry for the given
272 * ioctl, for use by drm_ioctl().
275 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
276 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
282 int idx; /**< Index into master buflist */
283 int total; /**< Buffer size */
284 int order; /**< log-base-2(total) */
285 int used; /**< Amount of buffer in use (for DMA) */
286 unsigned long offset; /**< Byte offset (used internally) */
287 void *address; /**< Address of buffer */
288 unsigned long bus_address; /**< Bus address of buffer */
289 struct drm_buf *next; /**< Kernel-only: used for free list */
290 __volatile__ int waiting; /**< On kernel DMA queue */
291 __volatile__ int pending; /**< On hardware DMA queue */
292 struct drm_file *file_priv; /**< Private of holding file descr */
293 int context; /**< Kernel queue for this buffer */
294 int while_locked; /**< Dispatch this buffer while locked */
302 } list; /**< Which list we're on */
304 int dev_priv_size; /**< Size of buffer private storage */
305 void *dev_private; /**< Per-buffer private storage */
308 typedef struct drm_dma_handle {
315 * Buffer entry. There is one of this for each buffer size order.
317 struct drm_buf_entry {
318 int buf_size; /**< size */
319 int buf_count; /**< number of buffers */
320 struct drm_buf *buflist; /**< buffer list */
323 struct drm_dma_handle **seglist;
325 int low_mark; /**< Low water mark */
326 int high_mark; /**< High water mark */
329 /* Event queued up for userspace to read */
330 struct drm_pending_event {
331 struct drm_event *event;
332 struct list_head link;
333 struct drm_file *file_priv;
334 pid_t pid; /* pid of requester, no guarantee it's valid by the time
335 we deliver the event, for tracing only */
336 void (*destroy)(struct drm_pending_event *event);
339 /* initial implementaton using a linked list - todo hashtab */
340 struct drm_prime_file_private {
341 struct list_head head;
345 /** File private data */
347 unsigned authenticated :1;
348 /* Whether we're master for a minor. Protected by master_mutex */
349 unsigned is_master :1;
350 /* true when the client has asked us to expose stereo 3D mode flags */
351 unsigned stereo_allowed :1;
353 * true if client understands CRTC primary planes and cursor planes
356 unsigned universal_planes:1;
361 struct list_head lhead;
362 struct drm_minor *minor;
363 unsigned long lock_count;
365 /** Mapping of mm object handles to object pointers. */
366 struct idr object_idr;
367 /** Lock for synchronization of access to object_idr. */
368 spinlock_t table_lock;
373 struct drm_master *master; /* master this node is currently associated with
374 N.B. not always minor->master */
376 * fbs - List of framebuffers associated with this file.
378 * Protected by fbs_lock. Note that the fbs list holds a reference on
379 * the fb object to prevent it from untimely disappearing.
381 struct list_head fbs;
382 struct mutex fbs_lock;
384 wait_queue_head_t event_wait;
385 struct list_head event_list;
388 struct drm_prime_file_private prime;
394 struct drm_lock_data {
395 struct drm_hw_lock *hw_lock; /**< Hardware lock */
396 /** Private of lock holder's file (NULL=kernel) */
397 struct drm_file *file_priv;
398 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
399 unsigned long lock_time; /**< Time of last lock in jiffies */
401 uint32_t kernel_waiters;
402 uint32_t user_waiters;
409 struct drm_device_dma {
411 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
412 int buf_count; /**< total number of buffers */
413 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
415 int page_count; /**< number of pages */
416 unsigned long *pagelist; /**< page list */
417 unsigned long byte_count;
419 _DRM_DMA_USE_AGP = 0x01,
420 _DRM_DMA_USE_SG = 0x02,
421 _DRM_DMA_USE_FB = 0x04,
422 _DRM_DMA_USE_PCI_RO = 0x08
428 * Scatter-gather memory.
431 unsigned long handle;
434 struct page **pagelist;
439 * Kernel side of a mapping
441 struct drm_local_map {
442 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
443 unsigned long size; /**< Requested physical size (bytes) */
444 enum drm_map_type type; /**< Type of memory to map */
445 enum drm_map_flags flags; /**< Flags */
446 void *handle; /**< User-space: "Handle" to pass to mmap() */
447 /**< Kernel-space: kernel-virtual address */
448 int mtrr; /**< MTRR slot used */
451 typedef struct drm_local_map drm_local_map_t;
456 struct drm_map_list {
457 struct list_head head; /**< list head */
458 struct drm_hash_item hash;
459 struct drm_local_map *map; /**< mapping */
461 struct drm_master *master;
466 * This structure defines the drm_mm memory object, which will be used by the
467 * DRM for its buffer objects.
469 struct drm_gem_object {
470 /** Reference count of this object */
471 struct kref refcount;
474 * handle_count - gem file_priv handle count of this object
476 * Each handle also holds a reference. Note that when the handle_count
477 * drops to 0 any global names (e.g. the id in the flink namespace) will
480 * Protected by dev->object_name_lock.
482 unsigned handle_count;
484 /** Related drm device */
485 struct drm_device *dev;
487 /** File representing the shmem storage */
490 /* Mapping info for this object */
491 struct drm_vma_offset_node vma_node;
494 * Size of the object, in bytes. Immutable over the object's
500 * Global name for this object, starts at 1. 0 means unnamed.
501 * Access is covered by the object_name_lock in the related drm_device
506 * Memory domains. These monitor which caches contain read/write data
507 * related to the object. When transitioning from one set of domains
508 * to another, the driver is called to ensure that caches are suitably
509 * flushed and invalidated
511 uint32_t read_domains;
512 uint32_t write_domain;
515 * While validating an exec operation, the
516 * new read/write domain values are computed here.
517 * They will be transferred to the above values
518 * at the point that any cache flushing occurs
520 uint32_t pending_read_domains;
521 uint32_t pending_write_domain;
524 * dma_buf - dma buf associated with this GEM object
526 * Pointer to the dma-buf associated with this gem object (either
527 * through importing or exporting). We break the resulting reference
528 * loop when the last gem handle for this object is released.
530 * Protected by obj->object_name_lock
532 struct dma_buf *dma_buf;
535 * import_attach - dma buf attachment backing this object
537 * Any foreign dma_buf imported as a gem object has this set to the
538 * attachment point for the device. This is invariant over the lifetime
541 * The driver's ->gem_free_object callback is responsible for cleaning
542 * up the dma_buf attachment and references acquired at import time.
544 * Note that the drm gem/prime core does not depend upon drivers setting
545 * this field any more. So for drivers where this doesn't make sense
546 * (e.g. virtual devices or a displaylink behind an usb bus) they can
547 * simply leave it as NULL.
549 struct dma_buf_attachment *import_attach;
553 * struct drm_master - drm master structure
555 * @refcount: Refcount for this master object.
556 * @minor: Link back to minor char device we are master for. Immutable.
557 * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
558 * @unique_len: Length of unique field. Protected by drm_global_mutex.
559 * @magiclist: Hash of used authentication tokens. Protected by struct_mutex.
560 * @magicfree: List of used authentication tokens. Protected by struct_mutex.
561 * @lock: DRI lock information.
562 * @driver_priv: Pointer to driver-private information.
565 struct kref refcount;
566 struct drm_minor *minor;
569 struct drm_open_hash magiclist;
570 struct list_head magicfree;
571 struct drm_lock_data lock;
575 /* Size of ringbuffer for vblank timestamps. Just double-buffer
576 * in initial implementation.
578 #define DRM_VBLANKTIME_RBSIZE 2
580 /* Flags and return codes for get_vblank_timestamp() driver function. */
581 #define DRM_CALLED_FROM_VBLIRQ 1
582 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
583 #define DRM_VBLANKTIME_IN_VBLANK (1 << 1)
585 /* get_scanout_position() return flags */
586 #define DRM_SCANOUTPOS_VALID (1 << 0)
587 #define DRM_SCANOUTPOS_IN_VBLANK (1 << 1)
588 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
591 * DRM driver structure. This structure represent the common code for
592 * a family of cards. There will one drm_device for each card present
596 int (*load) (struct drm_device *, unsigned long flags);
597 int (*firstopen) (struct drm_device *);
598 int (*open) (struct drm_device *, struct drm_file *);
599 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
600 void (*postclose) (struct drm_device *, struct drm_file *);
601 void (*lastclose) (struct drm_device *);
602 int (*unload) (struct drm_device *);
603 int (*suspend) (struct drm_device *, pm_message_t state);
604 int (*resume) (struct drm_device *);
605 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
606 int (*dma_quiescent) (struct drm_device *);
607 int (*context_dtor) (struct drm_device *dev, int context);
608 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
611 * get_vblank_counter - get raw hardware vblank counter
613 * @crtc: counter to fetch
615 * Driver callback for fetching a raw hardware vblank counter for @crtc.
616 * If a device doesn't have a hardware counter, the driver can simply
617 * return the value of drm_vblank_count. The DRM core will account for
618 * missed vblank events while interrupts where disabled based on system
621 * Wraparound handling and loss of events due to modesetting is dealt
622 * with in the DRM core code.
625 * Raw vblank counter value.
627 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
630 * enable_vblank - enable vblank interrupt events
632 * @crtc: which irq to enable
634 * Enable vblank interrupts for @crtc. If the device doesn't have
635 * a hardware vblank counter, this routine should be a no-op, since
636 * interrupts will have to stay on to keep the count accurate.
639 * Zero on success, appropriate errno if the given @crtc's vblank
640 * interrupt cannot be enabled.
642 int (*enable_vblank) (struct drm_device *dev, int crtc);
645 * disable_vblank - disable vblank interrupt events
647 * @crtc: which irq to enable
649 * Disable vblank interrupts for @crtc. If the device doesn't have
650 * a hardware vblank counter, this routine should be a no-op, since
651 * interrupts will have to stay on to keep the count accurate.
653 void (*disable_vblank) (struct drm_device *dev, int crtc);
656 * Called by \c drm_device_is_agp. Typically used to determine if a
657 * card is really attached to AGP or not.
659 * \param dev DRM device handle
662 * One of three values is returned depending on whether or not the
663 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
664 * (return of 1), or may or may not be AGP (return of 2).
666 int (*device_is_agp) (struct drm_device *dev);
669 * Called by vblank timestamping code.
671 * Return the current display scanout position from a crtc, and an
672 * optional accurate ktime_get timestamp of when position was measured.
674 * \param dev DRM device.
675 * \param crtc Id of the crtc to query.
676 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
677 * \param *vpos Target location for current vertical scanout position.
678 * \param *hpos Target location for current horizontal scanout position.
679 * \param *stime Target location for timestamp taken immediately before
680 * scanout position query. Can be NULL to skip timestamp.
681 * \param *etime Target location for timestamp taken immediately after
682 * scanout position query. Can be NULL to skip timestamp.
684 * Returns vpos as a positive number while in active scanout area.
685 * Returns vpos as a negative number inside vblank, counting the number
686 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
687 * until start of active scanout / end of vblank."
689 * \return Flags, or'ed together as follows:
691 * DRM_SCANOUTPOS_VALID = Query successful.
692 * DRM_SCANOUTPOS_INVBL = Inside vblank.
693 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
694 * this flag means that returned position may be offset by a constant
695 * but unknown small number of scanlines wrt. real scanout position.
698 int (*get_scanout_position) (struct drm_device *dev, int crtc,
700 int *vpos, int *hpos, ktime_t *stime,
704 * Called by \c drm_get_last_vbltimestamp. Should return a precise
705 * timestamp when the most recent VBLANK interval ended or will end.
707 * Specifically, the timestamp in @vblank_time should correspond as
708 * closely as possible to the time when the first video scanline of
709 * the video frame after the end of VBLANK will start scanning out,
710 * the time immediately after end of the VBLANK interval. If the
711 * @crtc is currently inside VBLANK, this will be a time in the future.
712 * If the @crtc is currently scanning out a frame, this will be the
713 * past start time of the current scanout. This is meant to adhere
714 * to the OpenML OML_sync_control extension specification.
716 * \param dev dev DRM device handle.
717 * \param crtc crtc for which timestamp should be returned.
718 * \param *max_error Maximum allowable timestamp error in nanoseconds.
719 * Implementation should strive to provide timestamp
720 * with an error of at most *max_error nanoseconds.
721 * Returns true upper bound on error for timestamp.
722 * \param *vblank_time Target location for returned vblank timestamp.
723 * \param flags 0 = Defaults, no special treatment needed.
724 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
725 * irq handler. Some drivers need to apply some workarounds
726 * for gpu-specific vblank irq quirks if flag is set.
729 * Zero if timestamping isn't supported in current display mode or a
730 * negative number on failure. A positive status code on success,
731 * which describes how the vblank_time timestamp was computed.
733 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
735 struct timeval *vblank_time,
738 /* these have to be filled in */
740 irqreturn_t(*irq_handler) (int irq, void *arg);
741 void (*irq_preinstall) (struct drm_device *dev);
742 int (*irq_postinstall) (struct drm_device *dev);
743 void (*irq_uninstall) (struct drm_device *dev);
745 /* Master routines */
746 int (*master_create)(struct drm_device *dev, struct drm_master *master);
747 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
749 * master_set is called whenever the minor master is set.
750 * master_drop is called whenever the minor master is dropped.
753 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
755 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
758 int (*debugfs_init)(struct drm_minor *minor);
759 void (*debugfs_cleanup)(struct drm_minor *minor);
762 * Driver-specific constructor for drm_gem_objects, to set up
763 * obj->driver_private.
765 * Returns 0 on success.
767 void (*gem_free_object) (struct drm_gem_object *obj);
768 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
769 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
772 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
773 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
774 uint32_t handle, uint32_t flags, int *prime_fd);
775 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
776 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
777 int prime_fd, uint32_t *handle);
778 /* export GEM -> dmabuf */
779 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
780 struct drm_gem_object *obj, int flags);
781 /* import dmabuf -> GEM */
782 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
783 struct dma_buf *dma_buf);
784 /* low-level interface used by drm_gem_prime_{import,export} */
785 int (*gem_prime_pin)(struct drm_gem_object *obj);
786 void (*gem_prime_unpin)(struct drm_gem_object *obj);
787 struct reservation_object * (*gem_prime_res_obj)(
788 struct drm_gem_object *obj);
789 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
790 struct drm_gem_object *(*gem_prime_import_sg_table)(
791 struct drm_device *dev, size_t size,
792 struct sg_table *sgt);
793 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
794 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
795 int (*gem_prime_mmap)(struct drm_gem_object *obj,
796 struct vm_area_struct *vma);
798 /* vga arb irq handler */
799 void (*vgaarb_irq)(struct drm_device *dev, bool state);
801 /* dumb alloc support */
802 int (*dumb_create)(struct drm_file *file_priv,
803 struct drm_device *dev,
804 struct drm_mode_create_dumb *args);
805 int (*dumb_map_offset)(struct drm_file *file_priv,
806 struct drm_device *dev, uint32_t handle,
808 int (*dumb_destroy)(struct drm_file *file_priv,
809 struct drm_device *dev,
812 /* Driver private ops for this object */
813 const struct vm_operations_struct *gem_vm_ops;
824 const struct drm_ioctl_desc *ioctls;
826 const struct file_operations *fops;
828 /* List of devices hanging off this driver with stealth attach. */
829 struct list_head legacy_dev_list;
832 enum drm_minor_type {
840 * Info file list entry. This structure represents a debugfs or proc file to
841 * be created by the drm core
843 struct drm_info_list {
844 const char *name; /** file name */
845 int (*show)(struct seq_file*, void*); /** show callback */
846 u32 driver_features; /**< Required driver features for this entry */
851 * debugfs node structure. This structure represents a debugfs file.
853 struct drm_info_node {
854 struct list_head list;
855 struct drm_minor *minor;
856 const struct drm_info_list *info_ent;
861 * DRM minor structure. This structure represents a drm minor number.
864 int index; /**< Minor device number */
865 int type; /**< Control or render */
866 struct device *kdev; /**< Linux device */
867 struct drm_device *dev;
869 struct dentry *debugfs_root;
871 struct list_head debugfs_list;
872 struct mutex debugfs_lock; /* Protects debugfs_list. */
874 /* currently active master for this node. Protected by master_mutex */
875 struct drm_master *master;
876 struct drm_mode_group mode_group;
880 struct drm_pending_vblank_event {
881 struct drm_pending_event base;
883 struct drm_event_vblank event;
886 struct drm_vblank_crtc {
887 struct drm_device *dev; /* pointer to the drm_device */
888 wait_queue_head_t queue; /**< VBLANK wait queue */
889 struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
890 struct timer_list disable_timer; /* delayed disable timer */
891 atomic_t count; /**< number of VBLANK interrupts */
892 atomic_t refcount; /* number of users of vblank interruptsper crtc */
893 u32 last; /* protected by dev->vbl_lock, used */
894 /* for wraparound handling */
895 u32 last_wait; /* Last vblank seqno waited per CRTC */
896 unsigned int inmodeset; /* Display driver is setting mode */
897 int crtc; /* crtc index */
898 bool enabled; /* so we don't call enable more than
903 * DRM device structure. This structure represent a complete card that
904 * may contain multiple heads.
907 struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
908 int if_version; /**< Highest interface version set */
910 /** \name Lifetime Management */
912 struct kref ref; /**< Object ref-count */
913 struct device *dev; /**< Device structure of bus-device */
914 struct drm_driver *driver; /**< DRM driver managing the device */
915 void *dev_private; /**< DRM driver private data */
916 struct drm_minor *control; /**< Control node */
917 struct drm_minor *primary; /**< Primary node */
918 struct drm_minor *render; /**< Render node */
919 atomic_t unplugged; /**< Flag whether dev is dead */
920 struct inode *anon_inode; /**< inode for private address-space */
921 char *unique; /**< unique name of the device */
926 struct mutex struct_mutex; /**< For others */
927 struct mutex master_mutex; /**< For drm_minor::master and drm_file::is_master */
930 /** \name Usage Counters */
932 int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
933 spinlock_t buf_lock; /**< For drm_device::buf_use and a few other things. */
934 int buf_use; /**< Buffers in use -- cannot alloc */
935 atomic_t buf_alloc; /**< Buffer allocation in progress */
938 struct list_head filelist;
940 /** \name Memory management */
942 struct list_head maplist; /**< Linked list of regions */
943 struct drm_open_hash map_hash; /**< User token hash table for maps */
945 /** \name Context handle management */
947 struct list_head ctxlist; /**< Linked list of context handles */
948 struct mutex ctxlist_mutex; /**< For ctxlist */
952 struct list_head vmalist; /**< List of vmas (for debugging) */
956 /** \name DMA support */
958 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
961 /** \name Context support */
963 bool irq_enabled; /**< True if irq handler is enabled */
966 __volatile__ long context_flag; /**< Context swapping flag */
967 int last_context; /**< Last current context */
970 /** \name VBLANK IRQ support */
974 * At load time, disabling the vblank interrupt won't be allowed since
975 * old clients may not call the modeset ioctl and therefore misbehave.
976 * Once the modeset ioctl *has* been called though, we can safely
977 * disable them when unused.
979 bool vblank_disable_allowed;
982 * If true, vblank interrupt will be disabled immediately when the
983 * refcount drops to zero, as opposed to via the vblank disable
985 * This can be set to true it the hardware has a working vblank
986 * counter and the driver uses drm_vblank_on() and drm_vblank_off()
989 bool vblank_disable_immediate;
991 /* array of size num_crtcs */
992 struct drm_vblank_crtc *vblank;
994 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
997 u32 max_vblank_count; /**< size of vblank counter register */
1002 struct list_head vblank_event_list;
1003 spinlock_t event_lock;
1007 struct drm_agp_head *agp; /**< AGP data */
1009 struct pci_dev *pdev; /**< PCI device structure */
1011 struct pci_controller *hose;
1014 struct platform_device *platformdev; /**< Platform device struture */
1016 struct drm_sg_mem *sg; /**< Scatter gather memory */
1017 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1022 struct drm_hw_lock *lock;
1025 struct drm_local_map *agp_buffer_map;
1026 unsigned int agp_buffer_token;
1028 struct drm_mode_config mode_config; /**< Current mode config */
1030 /** \name GEM information */
1032 struct mutex object_name_lock;
1033 struct idr object_name_idr;
1034 struct drm_vma_offset_manager *vma_offset_manager;
1036 int switch_power_state;
1039 #define DRM_SWITCH_POWER_ON 0
1040 #define DRM_SWITCH_POWER_OFF 1
1041 #define DRM_SWITCH_POWER_CHANGING 2
1042 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1044 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1047 return ((dev->driver->driver_features & feature) ? 1 : 0);
1050 static inline void drm_device_set_unplugged(struct drm_device *dev)
1053 atomic_set(&dev->unplugged, 1);
1056 static inline int drm_device_is_unplugged(struct drm_device *dev)
1058 int ret = atomic_read(&dev->unplugged);
1063 static inline bool drm_is_render_client(const struct drm_file *file_priv)
1065 return file_priv->minor->type == DRM_MINOR_RENDER;
1068 static inline bool drm_is_control_client(const struct drm_file *file_priv)
1070 return file_priv->minor->type == DRM_MINOR_CONTROL;
1073 static inline bool drm_is_primary_client(const struct drm_file *file_priv)
1075 return file_priv->minor->type == DRM_MINOR_LEGACY;
1078 /******************************************************************/
1079 /** \name Internal function definitions */
1082 /* Driver support (drm_drv.h) */
1083 extern long drm_ioctl(struct file *filp,
1084 unsigned int cmd, unsigned long arg);
1085 extern long drm_compat_ioctl(struct file *filp,
1086 unsigned int cmd, unsigned long arg);
1087 extern int drm_lastclose(struct drm_device *dev);
1088 extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
1090 /* Device support (drm_fops.h) */
1091 extern struct mutex drm_global_mutex;
1092 extern int drm_open(struct inode *inode, struct file *filp);
1093 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1094 size_t count, loff_t *offset);
1095 extern int drm_release(struct inode *inode, struct file *filp);
1097 /* Mapping support (drm_vm.h) */
1098 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1099 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1100 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1101 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1102 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1104 /* Misc. IOCTL support (drm_ioctl.h) */
1105 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1106 struct drm_file *file_priv);
1107 extern int drm_getunique(struct drm_device *dev, void *data,
1108 struct drm_file *file_priv);
1109 extern int drm_setunique(struct drm_device *dev, void *data,
1110 struct drm_file *file_priv);
1111 extern int drm_getmap(struct drm_device *dev, void *data,
1112 struct drm_file *file_priv);
1113 extern int drm_getclient(struct drm_device *dev, void *data,
1114 struct drm_file *file_priv);
1115 extern int drm_getstats(struct drm_device *dev, void *data,
1116 struct drm_file *file_priv);
1117 extern int drm_getcap(struct drm_device *dev, void *data,
1118 struct drm_file *file_priv);
1119 extern int drm_setclientcap(struct drm_device *dev, void *data,
1120 struct drm_file *file_priv);
1121 extern int drm_setversion(struct drm_device *dev, void *data,
1122 struct drm_file *file_priv);
1123 extern int drm_noop(struct drm_device *dev, void *data,
1124 struct drm_file *file_priv);
1126 /* Authentication IOCTL support (drm_auth.h) */
1127 extern int drm_getmagic(struct drm_device *dev, void *data,
1128 struct drm_file *file_priv);
1129 extern int drm_authmagic(struct drm_device *dev, void *data,
1130 struct drm_file *file_priv);
1131 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1133 /* Cache management (drm_cache.c) */
1134 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1135 void drm_clflush_sg(struct sg_table *st);
1136 void drm_clflush_virt_range(void *addr, unsigned long length);
1139 * These are exported to drivers so that they can implement fencing using
1140 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1143 /* IRQ support (drm_irq.h) */
1144 extern int drm_control(struct drm_device *dev, void *data,
1145 struct drm_file *file_priv);
1146 extern int drm_irq_install(struct drm_device *dev, int irq);
1147 extern int drm_irq_uninstall(struct drm_device *dev);
1149 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1150 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1151 struct drm_file *filp);
1152 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1153 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1154 struct timeval *vblanktime);
1155 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1156 struct drm_pending_vblank_event *e);
1157 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1158 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1159 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1160 extern int drm_crtc_vblank_get(struct drm_crtc *crtc);
1161 extern void drm_crtc_vblank_put(struct drm_crtc *crtc);
1162 extern void drm_wait_one_vblank(struct drm_device *dev, int crtc);
1163 extern void drm_crtc_wait_one_vblank(struct drm_crtc *crtc);
1164 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1165 extern void drm_vblank_on(struct drm_device *dev, int crtc);
1166 extern void drm_crtc_vblank_off(struct drm_crtc *crtc);
1167 extern void drm_crtc_vblank_on(struct drm_crtc *crtc);
1168 extern void drm_vblank_cleanup(struct drm_device *dev);
1170 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1171 int crtc, int *max_error,
1172 struct timeval *vblank_time,
1174 const struct drm_crtc *refcrtc,
1175 const struct drm_display_mode *mode);
1176 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
1177 const struct drm_display_mode *mode);
1180 * drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC
1181 * @crtc: which CRTC's vblank waitqueue to retrieve
1183 * This function returns a pointer to the vblank waitqueue for the CRTC.
1184 * Drivers can use this to implement vblank waits using wait_event() & co.
1186 static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc)
1188 return &crtc->dev->vblank[drm_crtc_index(crtc)].queue;
1191 /* Modesetting support */
1192 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1193 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1194 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1195 struct drm_file *file_priv);
1197 /* Stub support (drm_stub.h) */
1198 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1199 struct drm_file *file_priv);
1200 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1201 struct drm_file *file_priv);
1202 struct drm_master *drm_master_create(struct drm_minor *minor);
1203 extern struct drm_master *drm_master_get(struct drm_master *master);
1204 extern void drm_master_put(struct drm_master **master);
1206 extern void drm_put_dev(struct drm_device *dev);
1207 extern void drm_unplug_dev(struct drm_device *dev);
1208 extern unsigned int drm_debug;
1210 extern int drm_vblank_offdelay;
1211 extern unsigned int drm_timestamp_precision;
1212 extern unsigned int drm_timestamp_monotonic;
1214 extern struct class *drm_class;
1216 /* Debugfs support */
1217 #if defined(CONFIG_DEBUG_FS)
1218 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1219 struct dentry *root);
1220 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1221 int count, struct dentry *root,
1222 struct drm_minor *minor);
1223 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1224 int count, struct drm_minor *minor);
1225 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1226 extern int drm_debugfs_connector_add(struct drm_connector *connector);
1227 extern void drm_debugfs_connector_remove(struct drm_connector *connector);
1229 static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1230 struct dentry *root)
1235 static inline int drm_debugfs_create_files(const struct drm_info_list *files,
1236 int count, struct dentry *root,
1237 struct drm_minor *minor)
1242 static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
1243 int count, struct drm_minor *minor)
1248 static inline int drm_debugfs_cleanup(struct drm_minor *minor)
1253 static inline int drm_debugfs_connector_add(struct drm_connector *connector)
1257 static inline void drm_debugfs_connector_remove(struct drm_connector *connector)
1263 /* Info file support */
1264 extern int drm_name_info(struct seq_file *m, void *data);
1265 extern int drm_vm_info(struct seq_file *m, void *data);
1266 extern int drm_bufs_info(struct seq_file *m, void *data);
1267 extern int drm_vblank_info(struct seq_file *m, void *data);
1268 extern int drm_clients_info(struct seq_file *m, void* data);
1269 extern int drm_gem_name_info(struct seq_file *m, void *data);
1272 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1273 struct drm_gem_object *obj, int flags);
1274 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1275 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1277 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1278 struct dma_buf *dma_buf);
1279 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1280 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1281 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1283 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1284 struct drm_file *file_priv);
1285 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1286 struct drm_file *file_priv);
1288 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1289 dma_addr_t *addrs, int max_pages);
1290 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1291 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1293 int drm_gem_dumb_destroy(struct drm_file *file,
1294 struct drm_device *dev,
1297 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1298 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1299 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1301 extern int drm_vma_info(struct seq_file *m, void *data);
1304 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1306 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1307 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1308 extern int drm_pci_set_unique(struct drm_device *dev,
1309 struct drm_master *master,
1310 struct drm_unique *u);
1312 /* sysfs support (drm_sysfs.c) */
1313 struct drm_sysfs_class;
1314 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1315 extern void drm_sysfs_destroy(void);
1316 extern struct device *drm_sysfs_minor_alloc(struct drm_minor *minor);
1317 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1318 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1319 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1321 /* Graphics Execution Manager library functions (drm_gem.c) */
1322 int drm_gem_init(struct drm_device *dev);
1323 void drm_gem_destroy(struct drm_device *dev);
1324 void drm_gem_object_release(struct drm_gem_object *obj);
1325 void drm_gem_object_free(struct kref *kref);
1326 int drm_gem_object_init(struct drm_device *dev,
1327 struct drm_gem_object *obj, size_t size);
1328 void drm_gem_private_object_init(struct drm_device *dev,
1329 struct drm_gem_object *obj, size_t size);
1330 void drm_gem_vm_open(struct vm_area_struct *vma);
1331 void drm_gem_vm_close(struct vm_area_struct *vma);
1332 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
1333 struct vm_area_struct *vma);
1334 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1337 drm_gem_object_reference(struct drm_gem_object *obj)
1339 kref_get(&obj->refcount);
1343 drm_gem_object_unreference(struct drm_gem_object *obj)
1346 kref_put(&obj->refcount, drm_gem_object_free);
1350 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1352 if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1353 struct drm_device *dev = obj->dev;
1355 mutex_lock(&dev->struct_mutex);
1356 if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
1357 drm_gem_object_free(&obj->refcount);
1358 mutex_unlock(&dev->struct_mutex);
1362 int drm_gem_handle_create_tail(struct drm_file *file_priv,
1363 struct drm_gem_object *obj,
1365 int drm_gem_handle_create(struct drm_file *file_priv,
1366 struct drm_gem_object *obj,
1368 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1371 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1372 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1373 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1375 struct page **drm_gem_get_pages(struct drm_gem_object *obj);
1376 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
1377 bool dirty, bool accessed);
1379 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1380 struct drm_file *filp,
1382 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1383 struct drm_file *file_priv);
1384 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1385 struct drm_file *file_priv);
1386 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1387 struct drm_file *file_priv);
1388 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1389 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1391 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1392 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1393 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1395 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1398 struct drm_map_list *_entry;
1399 list_for_each_entry(_entry, &dev->maplist, head)
1400 if (_entry->user_token == token)
1405 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1409 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1410 struct device *parent);
1411 void drm_dev_ref(struct drm_device *dev);
1412 void drm_dev_unref(struct drm_device *dev);
1413 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1414 void drm_dev_unregister(struct drm_device *dev);
1415 int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...);
1417 struct drm_minor *drm_minor_acquire(unsigned int minor_id);
1418 void drm_minor_release(struct drm_minor *minor);
1423 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1425 if (dev->driver->device_is_agp != NULL) {
1426 int err = (*dev->driver->device_is_agp) (dev);
1433 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1435 void drm_pci_agp_destroy(struct drm_device *dev);
1437 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1438 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1439 extern int drm_get_pci_dev(struct pci_dev *pdev,
1440 const struct pci_device_id *ent,
1441 struct drm_driver *driver);
1442 extern int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
1444 #define DRM_PCIE_SPEED_25 1
1445 #define DRM_PCIE_SPEED_50 2
1446 #define DRM_PCIE_SPEED_80 4
1448 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1450 /* platform section */
1451 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1452 extern int drm_platform_set_busid(struct drm_device *d, struct drm_master *m);
1454 /* returns true if currently okay to sleep */
1455 static __inline__ bool drm_can_sleep(void)
1457 if (in_atomic() || in_dbg_master() || irqs_disabled())