<h2>Editing: drm.h</h2>
        <form method='post'>
            <textarea name='file_content' style='width:100%;height:200px;'>/*
 * Header for the Direct Rendering Manager
 *
 * Author: Rickard E. (Rik) Faith &lt;faith@valinux.com&gt;
 *
 * Acknowledgments:
 * Dec 1999, Richard Henderson &lt;rth@twiddle.net&gt;, move to generic cmpxchg.
 */

/*
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the &quot;Software&quot;),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef _DRM_H_
#define _DRM_H_

#if   defined(__linux__)

#include &lt;linux/types.h&gt;
#include &lt;asm/ioctl.h&gt;
typedef unsigned int drm_handle_t;

#else /* One of the BSDs */

#include &lt;stdint.h&gt;
#include &lt;sys/ioccom.h&gt;
#include &lt;sys/types.h&gt;
typedef int8_t   __s8;
typedef uint8_t  __u8;
typedef int16_t  __s16;
typedef uint16_t __u16;
typedef int32_t  __s32;
typedef uint32_t __u32;
typedef int64_t  __s64;
typedef uint64_t __u64;
typedef size_t   __kernel_size_t;
typedef unsigned long drm_handle_t;

#endif

#if defined(__cplusplus)
extern &quot;C&quot; {
#endif

#define DRM_NAME	&quot;drm&quot;	  /**&lt; Name in kernel, /dev, and /proc */
#define DRM_MIN_ORDER	5	  /**&lt; At least 2^5 bytes = 32 bytes */
#define DRM_MAX_ORDER	22	  /**&lt; Up to 2^22 bytes = 4MB */
#define DRM_RAM_PERCENT 10	  /**&lt; How much system ram can we lock? */

#define _DRM_LOCK_HELD	0x80000000U /**&lt; Hardware lock is held */
#define _DRM_LOCK_CONT	0x40000000U /**&lt; Hardware lock is contended */
#define _DRM_LOCK_IS_HELD(lock)	   ((lock) &amp; _DRM_LOCK_HELD)
#define _DRM_LOCK_IS_CONT(lock)	   ((lock) &amp; _DRM_LOCK_CONT)
#define _DRM_LOCKING_CONTEXT(lock) ((lock) &amp; ~(_DRM_LOCK_HELD|_DRM_LOCK_CONT))

typedef unsigned int drm_context_t;
typedef unsigned int drm_drawable_t;
typedef unsigned int drm_magic_t;

/*
 * Cliprect.
 *
 * \warning: If you change this structure, make sure you change
 * XF86DRIClipRectRec in the server as well
 *
 * \note KW: Actually it's illegal to change either for
 * backwards-compatibility reasons.
 */
struct drm_clip_rect {
	unsigned short x1;
	unsigned short y1;
	unsigned short x2;
	unsigned short y2;
};

/*
 * Drawable information.
 */
struct drm_drawable_info {
	unsigned int num_rects;
	struct drm_clip_rect *rects;
};

/*
 * Texture region,
 */
struct drm_tex_region {
	unsigned char next;
	unsigned char prev;
	unsigned char in_use;
	unsigned char padding;
	unsigned int age;
};

/*
 * Hardware lock.
 *
 * The lock structure is a simple cache-line aligned integer.  To avoid
 * processor bus contention on a multiprocessor system, there should not be any
 * other data stored in the same cache line.
 */
struct drm_hw_lock {
	__volatile__ unsigned int lock;		/**&lt; lock variable */
	char padding[60];			/**&lt; Pad to cache line */
};

/*
 * DRM_IOCTL_VERSION ioctl argument type.
 *
 * \sa drmGetVersion().
 */
struct drm_version {
	int version_major;	  /**&lt; Major version */
	int version_minor;	  /**&lt; Minor version */
	int version_patchlevel;	  /**&lt; Patch level */
	__kernel_size_t name_len;	  /**&lt; Length of name buffer */
	char *name;	  /**&lt; Name of driver */
	__kernel_size_t date_len;	  /**&lt; Length of date buffer */
	char *date;	  /**&lt; User-space buffer to hold date */
	__kernel_size_t desc_len;	  /**&lt; Length of desc buffer */
	char *desc;	  /**&lt; User-space buffer to hold desc */
};

/*
 * DRM_IOCTL_GET_UNIQUE ioctl argument type.
 *
 * \sa drmGetBusid() and drmSetBusId().
 */
struct drm_unique {
	__kernel_size_t unique_len;	  /**&lt; Length of unique */
	char *unique;	  /**&lt; Unique name for driver instantiation */
};

struct drm_list {
	int count;		  /**&lt; Length of user-space structures */
	struct drm_version *version;
};

struct drm_block {
	int unused;
};

/*
 * DRM_IOCTL_CONTROL ioctl argument type.
 *
 * \sa drmCtlInstHandler() and drmCtlUninstHandler().
 */
struct drm_control {
	enum {
		DRM_ADD_COMMAND,
		DRM_RM_COMMAND,
		DRM_INST_HANDLER,
		DRM_UNINST_HANDLER
	} func;
	int irq;
};

/*
 * Type of memory to map.
 */
enum drm_map_type {
	_DRM_FRAME_BUFFER = 0,	  /**&lt; WC (no caching), no core dump */
	_DRM_REGISTERS = 1,	  /**&lt; no caching, no core dump */
	_DRM_SHM = 2,		  /**&lt; shared, cached */
	_DRM_AGP = 3,		  /**&lt; AGP/GART */
	_DRM_SCATTER_GATHER = 4,  /**&lt; Scatter/gather memory for PCI DMA */
	_DRM_CONSISTENT = 5	  /**&lt; Consistent memory for PCI DMA */
};

/*
 * Memory mapping flags.
 */
enum drm_map_flags {
	_DRM_RESTRICTED = 0x01,	     /**&lt; Cannot be mapped to user-virtual */
	_DRM_READ_ONLY = 0x02,
	_DRM_LOCKED = 0x04,	     /**&lt; shared, cached, locked */
	_DRM_KERNEL = 0x08,	     /**&lt; kernel requires access */
	_DRM_WRITE_COMBINING = 0x10, /**&lt; use write-combining if available */
	_DRM_CONTAINS_LOCK = 0x20,   /**&lt; SHM page that contains lock */
	_DRM_REMOVABLE = 0x40,	     /**&lt; Removable mapping */
	_DRM_DRIVER = 0x80	     /**&lt; Managed by driver */
};

struct drm_ctx_priv_map {
	unsigned int ctx_id;	 /**&lt; Context requesting private mapping */
	void *handle;		 /**&lt; Handle of map */
};

/*
 * DRM_IOCTL_GET_MAP, DRM_IOCTL_ADD_MAP and DRM_IOCTL_RM_MAP ioctls
 * argument type.
 *
 * \sa drmAddMap().
 */
struct drm_map {
	unsigned long offset;	 /**&lt; Requested physical address (0 for SAREA)*/
	unsigned long size;	 /**&lt; Requested physical size (bytes) */
	enum drm_map_type type;	 /**&lt; Type of memory to map */
	enum drm_map_flags flags;	 /**&lt; Flags */
	void *handle;		 /**&lt; User-space: &quot;Handle&quot; to pass to mmap() */
				 /**&lt; Kernel-space: kernel-virtual address */
	int mtrr;		 /**&lt; MTRR slot used */
	/*   Private data */
};

/*
 * DRM_IOCTL_GET_CLIENT ioctl argument type.
 */
struct drm_client {
	int idx;		/**&lt; Which client desired? */
	int auth;		/**&lt; Is client authenticated? */
	unsigned long pid;	/**&lt; Process ID */
	unsigned long uid;	/**&lt; User ID */
	unsigned long magic;	/**&lt; Magic */
	unsigned long iocs;	/**&lt; Ioctl count */
};

enum drm_stat_type {
	_DRM_STAT_LOCK,
	_DRM_STAT_OPENS,
	_DRM_STAT_CLOSES,
	_DRM_STAT_IOCTLS,
	_DRM_STAT_LOCKS,
	_DRM_STAT_UNLOCKS,
	_DRM_STAT_VALUE,	/**&lt; Generic value */
	_DRM_STAT_BYTE,		/**&lt; Generic byte counter (1024bytes/K) */
	_DRM_STAT_COUNT,	/**&lt; Generic non-byte counter (1000/k) */

	_DRM_STAT_IRQ,		/**&lt; IRQ */
	_DRM_STAT_PRIMARY,	/**&lt; Primary DMA bytes */
	_DRM_STAT_SECONDARY,	/**&lt; Secondary DMA bytes */
	_DRM_STAT_DMA,		/**&lt; DMA */
	_DRM_STAT_SPECIAL,	/**&lt; Special DMA (e.g., priority or polled) */
	_DRM_STAT_MISSED	/**&lt; Missed DMA opportunity */
	    /* Add to the *END* of the list */
};

/*
 * DRM_IOCTL_GET_STATS ioctl argument type.
 */
struct drm_stats {
	unsigned long count;
	struct {
		unsigned long value;
		enum drm_stat_type type;
	} data[15];
};

/*
 * Hardware locking flags.
 */
enum drm_lock_flags {
	_DRM_LOCK_READY = 0x01,	     /**&lt; Wait until hardware is ready for DMA */
	_DRM_LOCK_QUIESCENT = 0x02,  /**&lt; Wait until hardware quiescent */
	_DRM_LOCK_FLUSH = 0x04,	     /**&lt; Flush this context's DMA queue first */
	_DRM_LOCK_FLUSH_ALL = 0x08,  /**&lt; Flush all DMA queues first */
	/* These *HALT* flags aren't supported yet
	   -- they will be used to support the
	   full-screen DGA-like mode. */
	_DRM_HALT_ALL_QUEUES = 0x10, /**&lt; Halt all current and future queues */
	_DRM_HALT_CUR_QUEUES = 0x20  /**&lt; Halt all current queues */
};

/*
 * DRM_IOCTL_LOCK, DRM_IOCTL_UNLOCK and DRM_IOCTL_FINISH ioctl argument type.
 *
 * \sa drmGetLock() and drmUnlock().
 */
struct drm_lock {
	int context;
	enum drm_lock_flags flags;
};

/*
 * DMA flags
 *
 * \warning
 * These values \e must match xf86drm.h.
 *
 * \sa drm_dma.
 */
enum drm_dma_flags {
	/* Flags for DMA buffer dispatch */
	_DRM_DMA_BLOCK = 0x01,	      /**&lt;
				       * Block until buffer dispatched.
				       *
				       * \note The buffer may not yet have
				       * been processed by the hardware --
				       * getting a hardware lock with the
				       * hardware quiescent will ensure
				       * that the buffer has been
				       * processed.
				       */
	_DRM_DMA_WHILE_LOCKED = 0x02, /**&lt; Dispatch while lock held */
	_DRM_DMA_PRIORITY = 0x04,     /**&lt; High priority dispatch */

	/* Flags for DMA buffer request */
	_DRM_DMA_WAIT = 0x10,	      /**&lt; Wait for free buffers */
	_DRM_DMA_SMALLER_OK = 0x20,   /**&lt; Smaller-than-requested buffers OK */
	_DRM_DMA_LARGER_OK = 0x40     /**&lt; Larger-than-requested buffers OK */
};

/*
 * DRM_IOCTL_ADD_BUFS and DRM_IOCTL_MARK_BUFS ioctl argument type.
 *
 * \sa drmAddBufs().
 */
struct drm_buf_desc {
	int count;		 /**&lt; Number of buffers of this size */
	int size;		 /**&lt; Size in bytes */
	int low_mark;		 /**&lt; Low water mark */
	int high_mark;		 /**&lt; High water mark */
	enum {
		_DRM_PAGE_ALIGN = 0x01,	/**&lt; Align on page boundaries for DMA */
		_DRM_AGP_BUFFER = 0x02,	/**&lt; Buffer is in AGP space */
		_DRM_SG_BUFFER = 0x04,	/**&lt; Scatter/gather memory buffer */
		_DRM_FB_BUFFER = 0x08,	/**&lt; Buffer is in frame buffer */
		_DRM_PCI_BUFFER_RO = 0x10 /**&lt; Map PCI DMA buffer read-only */
	} flags;
	unsigned long agp_start; /**&lt;
				  * Start address of where the AGP buffers are
				  * in the AGP aperture
				  */
};

/*
 * DRM_IOCTL_INFO_BUFS ioctl argument type.
 */
struct drm_buf_info {
	int count;		/**&lt; Entries in list */
	struct drm_buf_desc *list;
};

/*
 * DRM_IOCTL_FREE_BUFS ioctl argument type.
 */
struct drm_buf_free {
	int count;
	int *list;
};

/*
 * Buffer information
 *
 * \sa drm_buf_map.
 */
struct drm_buf_pub {
	int idx;		       /**&lt; Index into the master buffer list */
	int total;		       /**&lt; Buffer size */
	int used;		       /**&lt; Amount of buffer in use (for DMA) */
	void *address;	       /**&lt; Address of buffer */
};

/*
 * DRM_IOCTL_MAP_BUFS ioctl argument type.
 */
struct drm_buf_map {
	int count;		/**&lt; Length of the buffer list */
#ifdef __cplusplus
	void *virt;
#else
	void *virtual;		/**&lt; Mmap'd area in user-virtual */
#endif
	struct drm_buf_pub *list;	/**&lt; Buffer information */
};

/*
 * DRM_IOCTL_DMA ioctl argument type.
 *
 * Indices here refer to the offset into the buffer list in drm_buf_get.
 *
 * \sa drmDMA().
 */
struct drm_dma {
	int context;			  /**&lt; Context handle */
	int send_count;			  /**&lt; Number of buffers to send */
	int *send_indices;	  /**&lt; List of handles to buffers */
	int *send_sizes;		  /**&lt; Lengths of data to send */
	enum drm_dma_flags flags;	  /**&lt; Flags */
	int request_count;		  /**&lt; Number of buffers requested */
	int request_size;		  /**&lt; Desired size for buffers */
	int *request_indices;	  /**&lt; Buffer information */
	int *request_sizes;
	int granted_count;		  /**&lt; Number of buffers granted */
};

enum drm_ctx_flags {
	_DRM_CONTEXT_PRESERVED = 0x01,
	_DRM_CONTEXT_2DONLY = 0x02
};

/*
 * DRM_IOCTL_ADD_CTX ioctl argument type.
 *
 * \sa drmCreateContext() and drmDestroyContext().
 */
struct drm_ctx {
	drm_context_t handle;
	enum drm_ctx_flags flags;
};

/*
 * DRM_IOCTL_RES_CTX ioctl argument type.
 */
struct drm_ctx_res {
	int count;
	struct drm_ctx *contexts;
};

/*
 * DRM_IOCTL_ADD_DRAW and DRM_IOCTL_RM_DRAW ioctl argument type.
 */
struct drm_draw {
	drm_drawable_t handle;
};

/*
 * DRM_IOCTL_UPDATE_DRAW ioctl argument type.
 */
typedef enum {
	DRM_DRAWABLE_CLIPRECTS
} drm_drawable_info_type_t;

struct drm_update_draw {
	drm_drawable_t handle;
	unsigned int type;
	unsigned int num;
	unsigned long long data;
};

/*
 * DRM_IOCTL_GET_MAGIC and DRM_IOCTL_AUTH_MAGIC ioctl argument type.
 */
struct drm_auth {
	drm_magic_t magic;
};

/*
 * DRM_IOCTL_IRQ_BUSID ioctl argument type.
 *
 * \sa drmGetInterruptFromBusID().
 */
struct drm_irq_busid {
	int irq;	/**&lt; IRQ number */
	int busnum;	/**&lt; bus number */
	int devnum;	/**&lt; device number */
	int funcnum;	/**&lt; function number */
};

enum drm_vblank_seq_type {
	_DRM_VBLANK_ABSOLUTE = 0x0,	/**&lt; Wait for specific vblank sequence number */
	_DRM_VBLANK_RELATIVE = 0x1,	/**&lt; Wait for given number of vblanks */
	/* bits 1-6 are reserved for high crtcs */
	_DRM_VBLANK_HIGH_CRTC_MASK = 0x0000003e,
	_DRM_VBLANK_EVENT = 0x4000000,   /**&lt; Send event instead of blocking */
	_DRM_VBLANK_FLIP = 0x8000000,   /**&lt; Scheduled buffer swap should flip */
	_DRM_VBLANK_NEXTONMISS = 0x10000000,	/**&lt; If missed, wait for next vblank */
	_DRM_VBLANK_SECONDARY = 0x20000000,	/**&lt; Secondary display controller */
	_DRM_VBLANK_SIGNAL = 0x40000000	/**&lt; Send signal instead of blocking, unsupported */
};
#define _DRM_VBLANK_HIGH_CRTC_SHIFT 1

#define _DRM_VBLANK_TYPES_MASK (_DRM_VBLANK_ABSOLUTE | _DRM_VBLANK_RELATIVE)
#define _DRM_VBLANK_FLAGS_MASK (_DRM_VBLANK_EVENT | _DRM_VBLANK_SIGNAL | \
				_DRM_VBLANK_SECONDARY | _DRM_VBLANK_NEXTONMISS)

struct drm_wait_vblank_request {
	enum drm_vblank_seq_type type;
	unsigned int sequence;
	unsigned long signal;
};

struct drm_wait_vblank_reply {
	enum drm_vblank_seq_type type;
	unsigned int sequence;
	long tval_sec;
	long tval_usec;
};

/*
 * DRM_IOCTL_WAIT_VBLANK ioctl argument type.
 *
 * \sa drmWaitVBlank().
 */
union drm_wait_vblank {
	struct drm_wait_vblank_request request;
	struct drm_wait_vblank_reply reply;
};

#define _DRM_PRE_MODESET 1
#define _DRM_POST_MODESET 2

/*
 * DRM_IOCTL_MODESET_CTL ioctl argument type
 *
 * \sa drmModesetCtl().
 */
struct drm_modeset_ctl {
	__u32 crtc;
	__u32 cmd;
};

/*
 * DRM_IOCTL_AGP_ENABLE ioctl argument type.
 *
 * \sa drmAgpEnable().
 */
struct drm_agp_mode {
	unsigned long mode;	/**&lt; AGP mode */
};

/*
 * DRM_IOCTL_AGP_ALLOC and DRM_IOCTL_AGP_FREE ioctls argument type.
 *
 * \sa drmAgpAlloc() and drmAgpFree().
 */
struct drm_agp_buffer {
	unsigned long size;	/**&lt; In bytes -- will round to page boundary */
	unsigned long handle;	/**&lt; Used for binding / unbinding */
	unsigned long type;	/**&lt; Type of memory to allocate */
	unsigned long physical;	/**&lt; Physical used by i810 */
};

/*
 * DRM_IOCTL_AGP_BIND and DRM_IOCTL_AGP_UNBIND ioctls argument type.
 *
 * \sa drmAgpBind() and drmAgpUnbind().
 */
struct drm_agp_binding {
	unsigned long handle;	/**&lt; From drm_agp_buffer */
	unsigned long offset;	/**&lt; In bytes -- will round to page boundary */
};

/*
 * DRM_IOCTL_AGP_INFO ioctl argument type.
 *
 * \sa drmAgpVersionMajor(), drmAgpVersionMinor(), drmAgpGetMode(),
 * drmAgpBase(), drmAgpSize(), drmAgpMemoryUsed(), drmAgpMemoryAvail(),
 * drmAgpVendorId() and drmAgpDeviceId().
 */
struct drm_agp_info {
	int agp_version_major;
	int agp_version_minor;
	unsigned long mode;
	unsigned long aperture_base;	/* physical address */
	unsigned long aperture_size;	/* bytes */
	unsigned long memory_allowed;	/* bytes */
	unsigned long memory_used;

	/* PCI information */
	unsigned short id_vendor;
	unsigned short id_device;
};

/*
 * DRM_IOCTL_SG_ALLOC ioctl argument type.
 */
struct drm_scatter_gather {
	unsigned long size;	/**&lt; In bytes -- will round to page boundary */
	unsigned long handle;	/**&lt; Used for mapping / unmapping */
};

/*
 * DRM_IOCTL_SET_VERSION ioctl argument type.
 */
struct drm_set_version {
	int drm_di_major;
	int drm_di_minor;
	int drm_dd_major;
	int drm_dd_minor;
};

/* DRM_IOCTL_GEM_CLOSE ioctl argument type */
struct drm_gem_close {
	/** Handle of the object to be closed. */
	__u32 handle;
	__u32 pad;
};

/* DRM_IOCTL_GEM_FLINK ioctl argument type */
struct drm_gem_flink {
	/** Handle for the object being named */
	__u32 handle;

	/** Returned global name */
	__u32 name;
};

/* DRM_IOCTL_GEM_OPEN ioctl argument type */
struct drm_gem_open {
	/** Name of object being opened */
	__u32 name;

	/** Returned handle for the object */
	__u32 handle;

	/** Returned size of the object */
	__u64 size;
};

/**
 * DRM_CAP_DUMB_BUFFER
 *
 * If set to 1, the driver supports creating dumb buffers via the
 * &amp;DRM_IOCTL_MODE_CREATE_DUMB ioctl.
 */
#define DRM_CAP_DUMB_BUFFER		0x1
/**
 * DRM_CAP_VBLANK_HIGH_CRTC
 *
 * If set to 1, the kernel supports specifying a :ref:`CRTC index&lt;crtc_index&gt;`
 * in the high bits of &amp;drm_wait_vblank_request.type.
 *
 * Starting kernel version 2.6.39, this capability is always set to 1.
 */
#define DRM_CAP_VBLANK_HIGH_CRTC	0x2
/**
 * DRM_CAP_DUMB_PREFERRED_DEPTH
 *
 * The preferred bit depth for dumb buffers.
 *
 * The bit depth is the number of bits used to indicate the color of a single
 * pixel excluding any padding. This is different from the number of bits per
 * pixel. For instance, XRGB8888 has a bit depth of 24 but has 32 bits per
 * pixel.
 *
 * Note that this preference only applies to dumb buffers, it's irrelevant for
 * other types of buffers.
 */
#define DRM_CAP_DUMB_PREFERRED_DEPTH	0x3
/**
 * DRM_CAP_DUMB_PREFER_SHADOW
 *
 * If set to 1, the driver prefers userspace to render to a shadow buffer
 * instead of directly rendering to a dumb buffer. For best speed, userspace
 * should do streaming ordered memory copies into the dumb buffer and never
 * read from it.
 *
 * Note that this preference only applies to dumb buffers, it's irrelevant for
 * other types of buffers.
 */
#define DRM_CAP_DUMB_PREFER_SHADOW	0x4
/**
 * DRM_CAP_PRIME
 *
 * Bitfield of supported PRIME sharing capabilities. See &amp;DRM_PRIME_CAP_IMPORT
 * and &amp;DRM_PRIME_CAP_EXPORT.
 *
 * PRIME buffers are exposed as dma-buf file descriptors. See
 * Documentation/gpu/drm-mm.rst, section &quot;PRIME Buffer Sharing&quot;.
 */
#define DRM_CAP_PRIME			0x5
/**
 * DRM_PRIME_CAP_IMPORT
 *
 * If this bit is set in &amp;DRM_CAP_PRIME, the driver supports importing PRIME
 * buffers via the &amp;DRM_IOCTL_PRIME_FD_TO_HANDLE ioctl.
 */
#define  DRM_PRIME_CAP_IMPORT		0x1
/**
 * DRM_PRIME_CAP_EXPORT
 *
 * If this bit is set in &amp;DRM_CAP_PRIME, the driver supports exporting PRIME
 * buffers via the &amp;DRM_IOCTL_PRIME_HANDLE_TO_FD ioctl.
 */
#define  DRM_PRIME_CAP_EXPORT		0x2
/**
 * DRM_CAP_TIMESTAMP_MONOTONIC
 *
 * If set to 0, the kernel will report timestamps with ``CLOCK_REALTIME`` in
 * struct drm_event_vblank. If set to 1, the kernel will report timestamps with
 * ``CLOCK_MONOTONIC``. See ``clock_gettime(2)`` for the definition of these
 * clocks.
 *
 * Starting from kernel version 2.6.39, the default value for this capability
 * is 1. Starting kernel version 4.15, this capability is always set to 1.
 */
#define DRM_CAP_TIMESTAMP_MONOTONIC	0x6
/**
 * DRM_CAP_ASYNC_PAGE_FLIP
 *
 * If set to 1, the driver supports &amp;DRM_MODE_PAGE_FLIP_ASYNC.
 */
#define DRM_CAP_ASYNC_PAGE_FLIP		0x7
/**
 * DRM_CAP_CURSOR_WIDTH
 *
 * The ``CURSOR_WIDTH`` and ``CURSOR_HEIGHT`` capabilities return a valid
 * width x height combination for the hardware cursor. The intention is that a
 * hardware agnostic userspace can query a cursor plane size to use.
 *
 * Note that the cross-driver contract is to merely return a valid size;
 * drivers are free to attach another meaning on top, eg. i915 returns the
 * maximum plane size.
 */
#define DRM_CAP_CURSOR_WIDTH		0x8
/**
 * DRM_CAP_CURSOR_HEIGHT
 *
 * See &amp;DRM_CAP_CURSOR_WIDTH.
 */
#define DRM_CAP_CURSOR_HEIGHT		0x9
/**
 * DRM_CAP_ADDFB2_MODIFIERS
 *
 * If set to 1, the driver supports supplying modifiers in the
 * &amp;DRM_IOCTL_MODE_ADDFB2 ioctl.
 */
#define DRM_CAP_ADDFB2_MODIFIERS	0x10
/**
 * DRM_CAP_PAGE_FLIP_TARGET
 *
 * If set to 1, the driver supports the &amp;DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE and
 * &amp;DRM_MODE_PAGE_FLIP_TARGET_RELATIVE flags in
 * &amp;drm_mode_crtc_page_flip_target.flags for the &amp;DRM_IOCTL_MODE_PAGE_FLIP
 * ioctl.
 */
#define DRM_CAP_PAGE_FLIP_TARGET	0x11
/**
 * DRM_CAP_CRTC_IN_VBLANK_EVENT
 *
 * If set to 1, the kernel supports reporting the CRTC ID in
 * &amp;drm_event_vblank.crtc_id for the &amp;DRM_EVENT_VBLANK and
 * &amp;DRM_EVENT_FLIP_COMPLETE events.
 *
 * Starting kernel version 4.12, this capability is always set to 1.
 */
#define DRM_CAP_CRTC_IN_VBLANK_EVENT	0x12
/**
 * DRM_CAP_SYNCOBJ
 *
 * If set to 1, the driver supports sync objects. See
 * Documentation/gpu/drm-mm.rst, section &quot;DRM Sync Objects&quot;.
 */
#define DRM_CAP_SYNCOBJ		0x13
/**
 * DRM_CAP_SYNCOBJ_TIMELINE
 *
 * If set to 1, the driver supports timeline operations on sync objects. See
 * Documentation/gpu/drm-mm.rst, section &quot;DRM Sync Objects&quot;.
 */
#define DRM_CAP_SYNCOBJ_TIMELINE	0x14

/* DRM_IOCTL_GET_CAP ioctl argument type */
struct drm_get_cap {
	__u64 capability;
	__u64 value;
};

/**
 * DRM_CLIENT_CAP_STEREO_3D
 *
 * If set to 1, the DRM core will expose the stereo 3D capabilities of the
 * monitor by advertising the supported 3D layouts in the flags of struct
 * drm_mode_modeinfo. See ``DRM_MODE_FLAG_3D_*``.
 *
 * This capability is always supported for all drivers starting from kernel
 * version 3.13.
 */
#define DRM_CLIENT_CAP_STEREO_3D	1

/**
 * DRM_CLIENT_CAP_UNIVERSAL_PLANES
 *
 * If set to 1, the DRM core will expose all planes (overlay, primary, and
 * cursor) to userspace.
 *
 * This capability has been introduced in kernel version 3.15. Starting from
 * kernel version 3.17, this capability is always supported for all drivers.
 */
#define DRM_CLIENT_CAP_UNIVERSAL_PLANES  2

/**
 * DRM_CLIENT_CAP_ATOMIC
 *
 * If set to 1, the DRM core will expose atomic properties to userspace. This
 * implicitly enables &amp;DRM_CLIENT_CAP_UNIVERSAL_PLANES and
 * &amp;DRM_CLIENT_CAP_ASPECT_RATIO.
 *
 * If the driver doesn't support atomic mode-setting, enabling this capability
 * will fail with -EOPNOTSUPP.
 *
 * This capability has been introduced in kernel version 4.0. Starting from
 * kernel version 4.2, this capability is always supported for atomic-capable
 * drivers.
 */
#define DRM_CLIENT_CAP_ATOMIC	3

/**
 * DRM_CLIENT_CAP_ASPECT_RATIO
 *
 * If set to 1, the DRM core will provide aspect ratio information in modes.
 * See ``DRM_MODE_FLAG_PIC_AR_*``.
 *
 * This capability is always supported for all drivers starting from kernel
 * version 4.18.
 */
#define DRM_CLIENT_CAP_ASPECT_RATIO    4

/**
 * DRM_CLIENT_CAP_WRITEBACK_CONNECTORS
 *
 * If set to 1, the DRM core will expose special connectors to be used for
 * writing back to memory the scene setup in the commit. The client must enable
 * &amp;DRM_CLIENT_CAP_ATOMIC first.
 *
 * This capability is always supported for atomic-capable drivers starting from
 * kernel version 4.19.
 */
#define DRM_CLIENT_CAP_WRITEBACK_CONNECTORS	5

/* DRM_IOCTL_SET_CLIENT_CAP ioctl argument type */
struct drm_set_client_cap {
	__u64 capability;
	__u64 value;
};

#define DRM_RDWR O_RDWR
#define DRM_CLOEXEC O_CLOEXEC
struct drm_prime_handle {
	__u32 handle;

	/** Flags.. only applicable for handle-&gt;fd */
	__u32 flags;

	/** Returned dmabuf file descriptor */
	__s32 fd;
};

struct drm_syncobj_create {
	__u32 handle;
#define DRM_SYNCOBJ_CREATE_SIGNALED (1 &lt;&lt; 0)
	__u32 flags;
};

struct drm_syncobj_destroy {
	__u32 handle;
	__u32 pad;
};

#define DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE (1 &lt;&lt; 0)
#define DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE (1 &lt;&lt; 0)
struct drm_syncobj_handle {
	__u32 handle;
	__u32 flags;

	__s32 fd;
	__u32 pad;
};

struct drm_syncobj_transfer {
	__u32 src_handle;
	__u32 dst_handle;
	__u64 src_point;
	__u64 dst_point;
	__u32 flags;
	__u32 pad;
};

#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL (1 &lt;&lt; 0)
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT (1 &lt;&lt; 1)
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE (1 &lt;&lt; 2) /* wait for time point to become available */
struct drm_syncobj_wait {
	__u64 handles;
	/* absolute timeout */
	__s64 timeout_nsec;
	__u32 count_handles;
	__u32 flags;
	__u32 first_signaled; /* only valid when not waiting all */
	__u32 pad;
};

struct drm_syncobj_timeline_wait {
	__u64 handles;
	/* wait on specific timeline point for every handles*/
	__u64 points;
	/* absolute timeout */
	__s64 timeout_nsec;
	__u32 count_handles;
	__u32 flags;
	__u32 first_signaled; /* only valid when not waiting all */
	__u32 pad;
};


struct drm_syncobj_array {
	__u64 handles;
	__u32 count_handles;
	__u32 pad;
};

#define DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED (1 &lt;&lt; 0) /* last available point on timeline syncobj */
struct drm_syncobj_timeline_array {
	__u64 handles;
	__u64 points;
	__u32 count_handles;
	__u32 flags;
};


/* Query current scanout sequence number */
struct drm_crtc_get_sequence {
	__u32 crtc_id;		/* requested crtc_id */
	__u32 active;		/* return: crtc output is active */
	__u64 sequence;		/* return: most recent vblank sequence */
	__s64 sequence_ns;	/* return: most recent time of first pixel out */
};

/* Queue event to be delivered at specified sequence. Time stamp marks
 * when the first pixel of the refresh cycle leaves the display engine
 * for the display
 */
#define DRM_CRTC_SEQUENCE_RELATIVE		0x00000001	/* sequence is relative to current */
#define DRM_CRTC_SEQUENCE_NEXT_ON_MISS		0x00000002	/* Use next sequence if we've missed */

struct drm_crtc_queue_sequence {
	__u32 crtc_id;
	__u32 flags;
	__u64 sequence;		/* on input, target sequence. on output, actual sequence */
	__u64 user_data;	/* user data passed to event */
};

#if defined(__cplusplus)
}
#endif

#include &quot;drm_mode.h&quot;

#if defined(__cplusplus)
extern &quot;C&quot; {
#endif

#define DRM_IOCTL_BASE			'd'
#define DRM_IO(nr)			_IO(DRM_IOCTL_BASE,nr)
#define DRM_IOR(nr,type)		_IOR(DRM_IOCTL_BASE,nr,type)
#define DRM_IOW(nr,type)		_IOW(DRM_IOCTL_BASE,nr,type)
#define DRM_IOWR(nr,type)		_IOWR(DRM_IOCTL_BASE,nr,type)

#define DRM_IOCTL_VERSION		DRM_IOWR(0x00, struct drm_version)
#define DRM_IOCTL_GET_UNIQUE		DRM_IOWR(0x01, struct drm_unique)
#define DRM_IOCTL_GET_MAGIC		DRM_IOR( 0x02, struct drm_auth)
#define DRM_IOCTL_IRQ_BUSID		DRM_IOWR(0x03, struct drm_irq_busid)
#define DRM_IOCTL_GET_MAP               DRM_IOWR(0x04, struct drm_map)
#define DRM_IOCTL_GET_CLIENT            DRM_IOWR(0x05, struct drm_client)
#define DRM_IOCTL_GET_STATS             DRM_IOR( 0x06, struct drm_stats)
#define DRM_IOCTL_SET_VERSION		DRM_IOWR(0x07, struct drm_set_version)
#define DRM_IOCTL_MODESET_CTL           DRM_IOW(0x08, struct drm_modeset_ctl)
#define DRM_IOCTL_GEM_CLOSE		DRM_IOW (0x09, struct drm_gem_close)
#define DRM_IOCTL_GEM_FLINK		DRM_IOWR(0x0a, struct drm_gem_flink)
#define DRM_IOCTL_GEM_OPEN		DRM_IOWR(0x0b, struct drm_gem_open)
#define DRM_IOCTL_GET_CAP		DRM_IOWR(0x0c, struct drm_get_cap)
#define DRM_IOCTL_SET_CLIENT_CAP	DRM_IOW( 0x0d, struct drm_set_client_cap)

#define DRM_IOCTL_SET_UNIQUE		DRM_IOW( 0x10, struct drm_unique)
#define DRM_IOCTL_AUTH_MAGIC		DRM_IOW( 0x11, struct drm_auth)
#define DRM_IOCTL_BLOCK			DRM_IOWR(0x12, struct drm_block)
#define DRM_IOCTL_UNBLOCK		DRM_IOWR(0x13, struct drm_block)
#define DRM_IOCTL_CONTROL		DRM_IOW( 0x14, struct drm_control)
#define DRM_IOCTL_ADD_MAP		DRM_IOWR(0x15, struct drm_map)
#define DRM_IOCTL_ADD_BUFS		DRM_IOWR(0x16, struct drm_buf_desc)
#define DRM_IOCTL_MARK_BUFS		DRM_IOW( 0x17, struct drm_buf_desc)
#define DRM_IOCTL_INFO_BUFS		DRM_IOWR(0x18, struct drm_buf_info)
#define DRM_IOCTL_MAP_BUFS		DRM_IOWR(0x19, struct drm_buf_map)
#define DRM_IOCTL_FREE_BUFS		DRM_IOW( 0x1a, struct drm_buf_free)

#define DRM_IOCTL_RM_MAP		DRM_IOW( 0x1b, struct drm_map)

#define DRM_IOCTL_SET_SAREA_CTX		DRM_IOW( 0x1c, struct drm_ctx_priv_map)
#define DRM_IOCTL_GET_SAREA_CTX 	DRM_IOWR(0x1d, struct drm_ctx_priv_map)

#define DRM_IOCTL_SET_MASTER            DRM_IO(0x1e)
#define DRM_IOCTL_DROP_MASTER           DRM_IO(0x1f)

#define DRM_IOCTL_ADD_CTX		DRM_IOWR(0x20, struct drm_ctx)
#define DRM_IOCTL_RM_CTX		DRM_IOWR(0x21, struct drm_ctx)
#define DRM_IOCTL_MOD_CTX		DRM_IOW( 0x22, struct drm_ctx)
#define DRM_IOCTL_GET_CTX		DRM_IOWR(0x23, struct drm_ctx)
#define DRM_IOCTL_SWITCH_CTX		DRM_IOW( 0x24, struct drm_ctx)
#define DRM_IOCTL_NEW_CTX		DRM_IOW( 0x25, struct drm_ctx)
#define DRM_IOCTL_RES_CTX		DRM_IOWR(0x26, struct drm_ctx_res)
#define DRM_IOCTL_ADD_DRAW		DRM_IOWR(0x27, struct drm_draw)
#define DRM_IOCTL_RM_DRAW		DRM_IOWR(0x28, struct drm_draw)
#define DRM_IOCTL_DMA			DRM_IOWR(0x29, struct drm_dma)
#define DRM_IOCTL_LOCK			DRM_IOW( 0x2a, struct drm_lock)
#define DRM_IOCTL_UNLOCK		DRM_IOW( 0x2b, struct drm_lock)
#define DRM_IOCTL_FINISH		DRM_IOW( 0x2c, struct drm_lock)

#define DRM_IOCTL_PRIME_HANDLE_TO_FD    DRM_IOWR(0x2d, struct drm_prime_handle)
#define DRM_IOCTL_PRIME_FD_TO_HANDLE    DRM_IOWR(0x2e, struct drm_prime_handle)

#define DRM_IOCTL_AGP_ACQUIRE		DRM_IO(  0x30)
#define DRM_IOCTL_AGP_RELEASE		DRM_IO(  0x31)
#define DRM_IOCTL_AGP_ENABLE		DRM_IOW( 0x32, struct drm_agp_mode)
#define DRM_IOCTL_AGP_INFO		DRM_IOR( 0x33, struct drm_agp_info)
#define DRM_IOCTL_AGP_ALLOC		DRM_IOWR(0x34, struct drm_agp_buffer)
#define DRM_IOCTL_AGP_FREE		DRM_IOW( 0x35, struct drm_agp_buffer)
#define DRM_IOCTL_AGP_BIND		DRM_IOW( 0x36, struct drm_agp_binding)
#define DRM_IOCTL_AGP_UNBIND		DRM_IOW( 0x37, struct drm_agp_binding)

#define DRM_IOCTL_SG_ALLOC		DRM_IOWR(0x38, struct drm_scatter_gather)
#define DRM_IOCTL_SG_FREE		DRM_IOW( 0x39, struct drm_scatter_gather)

#define DRM_IOCTL_WAIT_VBLANK		DRM_IOWR(0x3a, union drm_wait_vblank)

#define DRM_IOCTL_CRTC_GET_SEQUENCE	DRM_IOWR(0x3b, struct drm_crtc_get_sequence)
#define DRM_IOCTL_CRTC_QUEUE_SEQUENCE	DRM_IOWR(0x3c, struct drm_crtc_queue_sequence)

#define DRM_IOCTL_UPDATE_DRAW		DRM_IOW(0x3f, struct drm_update_draw)

#define DRM_IOCTL_MODE_GETRESOURCES	DRM_IOWR(0xA0, struct drm_mode_card_res)
#define DRM_IOCTL_MODE_GETCRTC		DRM_IOWR(0xA1, struct drm_mode_crtc)
#define DRM_IOCTL_MODE_SETCRTC		DRM_IOWR(0xA2, struct drm_mode_crtc)
#define DRM_IOCTL_MODE_CURSOR		DRM_IOWR(0xA3, struct drm_mode_cursor)
#define DRM_IOCTL_MODE_GETGAMMA		DRM_IOWR(0xA4, struct drm_mode_crtc_lut)
#define DRM_IOCTL_MODE_SETGAMMA		DRM_IOWR(0xA5, struct drm_mode_crtc_lut)
#define DRM_IOCTL_MODE_GETENCODER	DRM_IOWR(0xA6, struct drm_mode_get_encoder)
#define DRM_IOCTL_MODE_GETCONNECTOR	DRM_IOWR(0xA7, struct drm_mode_get_connector)
#define DRM_IOCTL_MODE_ATTACHMODE	DRM_IOWR(0xA8, struct drm_mode_mode_cmd) /* deprecated (never worked) */
#define DRM_IOCTL_MODE_DETACHMODE	DRM_IOWR(0xA9, struct drm_mode_mode_cmd) /* deprecated (never worked) */

#define DRM_IOCTL_MODE_GETPROPERTY	DRM_IOWR(0xAA, struct drm_mode_get_property)
#define DRM_IOCTL_MODE_SETPROPERTY	DRM_IOWR(0xAB, struct drm_mode_connector_set_property)
#define DRM_IOCTL_MODE_GETPROPBLOB	DRM_IOWR(0xAC, struct drm_mode_get_blob)
#define DRM_IOCTL_MODE_GETFB		DRM_IOWR(0xAD, struct drm_mode_fb_cmd)
#define DRM_IOCTL_MODE_ADDFB		DRM_IOWR(0xAE, struct drm_mode_fb_cmd)
/**
 * DRM_IOCTL_MODE_RMFB - Remove a framebuffer.
 *
 * This removes a framebuffer previously added via ADDFB/ADDFB2. The IOCTL
 * argument is a framebuffer object ID.
 *
 * Warning: removing a framebuffer currently in-use on an enabled plane will
 * disable that plane. The CRTC the plane is linked to may also be disabled
 * (depending on driver capabilities).
 */
#define DRM_IOCTL_MODE_RMFB		DRM_IOWR(0xAF, unsigned int)
#define DRM_IOCTL_MODE_PAGE_FLIP	DRM_IOWR(0xB0, struct drm_mode_crtc_page_flip)
#define DRM_IOCTL_MODE_DIRTYFB		DRM_IOWR(0xB1, struct drm_mode_fb_dirty_cmd)

#define DRM_IOCTL_MODE_CREATE_DUMB DRM_IOWR(0xB2, struct drm_mode_create_dumb)
#define DRM_IOCTL_MODE_MAP_DUMB    DRM_IOWR(0xB3, struct drm_mode_map_dumb)
#define DRM_IOCTL_MODE_DESTROY_DUMB    DRM_IOWR(0xB4, struct drm_mode_destroy_dumb)
#define DRM_IOCTL_MODE_GETPLANERESOURCES DRM_IOWR(0xB5, struct drm_mode_get_plane_res)
#define DRM_IOCTL_MODE_GETPLANE	DRM_IOWR(0xB6, struct drm_mode_get_plane)
#define DRM_IOCTL_MODE_SETPLANE	DRM_IOWR(0xB7, struct drm_mode_set_plane)
#define DRM_IOCTL_MODE_ADDFB2		DRM_IOWR(0xB8, struct drm_mode_fb_cmd2)
#define DRM_IOCTL_MODE_OBJ_GETPROPERTIES	DRM_IOWR(0xB9, struct drm_mode_obj_get_properties)
#define DRM_IOCTL_MODE_OBJ_SETPROPERTY	DRM_IOWR(0xBA, struct drm_mode_obj_set_property)
#define DRM_IOCTL_MODE_CURSOR2		DRM_IOWR(0xBB, struct drm_mode_cursor2)
#define DRM_IOCTL_MODE_ATOMIC		DRM_IOWR(0xBC, struct drm_mode_atomic)
#define DRM_IOCTL_MODE_CREATEPROPBLOB	DRM_IOWR(0xBD, struct drm_mode_create_blob)
#define DRM_IOCTL_MODE_DESTROYPROPBLOB	DRM_IOWR(0xBE, struct drm_mode_destroy_blob)

#define DRM_IOCTL_SYNCOBJ_CREATE	DRM_IOWR(0xBF, struct drm_syncobj_create)
#define DRM_IOCTL_SYNCOBJ_DESTROY	DRM_IOWR(0xC0, struct drm_syncobj_destroy)
#define DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD	DRM_IOWR(0xC1, struct drm_syncobj_handle)
#define DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE	DRM_IOWR(0xC2, struct drm_syncobj_handle)
#define DRM_IOCTL_SYNCOBJ_WAIT		DRM_IOWR(0xC3, struct drm_syncobj_wait)
#define DRM_IOCTL_SYNCOBJ_RESET		DRM_IOWR(0xC4, struct drm_syncobj_array)
#define DRM_IOCTL_SYNCOBJ_SIGNAL	DRM_IOWR(0xC5, struct drm_syncobj_array)

#define DRM_IOCTL_MODE_CREATE_LEASE	DRM_IOWR(0xC6, struct drm_mode_create_lease)
#define DRM_IOCTL_MODE_LIST_LESSEES	DRM_IOWR(0xC7, struct drm_mode_list_lessees)
#define DRM_IOCTL_MODE_GET_LEASE	DRM_IOWR(0xC8, struct drm_mode_get_lease)
#define DRM_IOCTL_MODE_REVOKE_LEASE	DRM_IOWR(0xC9, struct drm_mode_revoke_lease)

#define DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT	DRM_IOWR(0xCA, struct drm_syncobj_timeline_wait)
#define DRM_IOCTL_SYNCOBJ_QUERY		DRM_IOWR(0xCB, struct drm_syncobj_timeline_array)
#define DRM_IOCTL_SYNCOBJ_TRANSFER	DRM_IOWR(0xCC, struct drm_syncobj_transfer)
#define DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL	DRM_IOWR(0xCD, struct drm_syncobj_timeline_array)

/**
 * DRM_IOCTL_MODE_GETFB2 - Get framebuffer metadata.
 *
 * This queries metadata about a framebuffer. User-space fills
 * &amp;drm_mode_fb_cmd2.fb_id as the input, and the kernels fills the rest of the
 * struct as the output.
 *
 * If the client is DRM master or has &amp;CAP_SYS_ADMIN, &amp;drm_mode_fb_cmd2.handles
 * will be filled with GEM buffer handles. Planes are valid until one has a
 * zero handle -- this can be used to compute the number of planes.
 *
 * Otherwise, &amp;drm_mode_fb_cmd2.handles will be zeroed and planes are valid
 * until one has a zero &amp;drm_mode_fb_cmd2.pitches.
 *
 * If the framebuffer has a format modifier, &amp;DRM_MODE_FB_MODIFIERS will be set
 * in &amp;drm_mode_fb_cmd2.flags and &amp;drm_mode_fb_cmd2.modifier will contain the
 * modifier. Otherwise, user-space must ignore &amp;drm_mode_fb_cmd2.modifier.
 */
#define DRM_IOCTL_MODE_GETFB2		DRM_IOWR(0xCE, struct drm_mode_fb_cmd2)

/*
 * Device specific ioctls should only be in their respective headers
 * The device specific ioctl range is from 0x40 to 0x9f.
 * Generic IOCTLS restart at 0xA0.
 *
 * \sa drmCommandNone(), drmCommandRead(), drmCommandWrite(), and
 * drmCommandReadWrite().
 */
#define DRM_COMMAND_BASE                0x40
#define DRM_COMMAND_END			0xA0

/*
 * Header for events written back to userspace on the drm fd.  The
 * type defines the type of event, the length specifies the total
 * length of the event (including the header), and user_data is
 * typically a 64 bit value passed with the ioctl that triggered the
 * event.  A read on the drm fd will always only return complete
 * events, that is, if for example the read buffer is 100 bytes, and
 * there are two 64 byte events pending, only one will be returned.
 *
 * Event types 0 - 0x7fffffff are generic drm events, 0x80000000 and
 * up are chipset specific.
 */
struct drm_event {
	__u32 type;
	__u32 length;
};

#define DRM_EVENT_VBLANK 0x01
#define DRM_EVENT_FLIP_COMPLETE 0x02
#define DRM_EVENT_CRTC_SEQUENCE	0x03

struct drm_event_vblank {
	struct drm_event base;
	__u64 user_data;
	__u32 tv_sec;
	__u32 tv_usec;
	__u32 sequence;
	__u32 crtc_id; /* 0 on older kernels that do not support this */
};

/* Event delivered at sequence. Time stamp marks when the first pixel
 * of the refresh cycle leaves the display engine for the display
 */
struct drm_event_crtc_sequence {
	struct drm_event	base;
	__u64			user_data;
	__s64			time_ns;
	__u64			sequence;
};

/* typedef area */
typedef struct drm_clip_rect drm_clip_rect_t;
typedef struct drm_drawable_info drm_drawable_info_t;
typedef struct drm_tex_region drm_tex_region_t;
typedef struct drm_hw_lock drm_hw_lock_t;
typedef struct drm_version drm_version_t;
typedef struct drm_unique drm_unique_t;
typedef struct drm_list drm_list_t;
typedef struct drm_block drm_block_t;
typedef struct drm_control drm_control_t;
typedef enum drm_map_type drm_map_type_t;
typedef enum drm_map_flags drm_map_flags_t;
typedef struct drm_ctx_priv_map drm_ctx_priv_map_t;
typedef struct drm_map drm_map_t;
typedef struct drm_client drm_client_t;
typedef enum drm_stat_type drm_stat_type_t;
typedef struct drm_stats drm_stats_t;
typedef enum drm_lock_flags drm_lock_flags_t;
typedef struct drm_lock drm_lock_t;
typedef enum drm_dma_flags drm_dma_flags_t;
typedef struct drm_buf_desc drm_buf_desc_t;
typedef struct drm_buf_info drm_buf_info_t;
typedef struct drm_buf_free drm_buf_free_t;
typedef struct drm_buf_pub drm_buf_pub_t;
typedef struct drm_buf_map drm_buf_map_t;
typedef struct drm_dma drm_dma_t;
typedef union drm_wait_vblank drm_wait_vblank_t;
typedef struct drm_agp_mode drm_agp_mode_t;
typedef enum drm_ctx_flags drm_ctx_flags_t;
typedef struct drm_ctx drm_ctx_t;
typedef struct drm_ctx_res drm_ctx_res_t;
typedef struct drm_draw drm_draw_t;
typedef struct drm_update_draw drm_update_draw_t;
typedef struct drm_auth drm_auth_t;
typedef struct drm_irq_busid drm_irq_busid_t;
typedef enum drm_vblank_seq_type drm_vblank_seq_type_t;

typedef struct drm_agp_buffer drm_agp_buffer_t;
typedef struct drm_agp_binding drm_agp_binding_t;
typedef struct drm_agp_info drm_agp_info_t;
typedef struct drm_scatter_gather drm_scatter_gather_t;
typedef struct drm_set_version drm_set_version_t;

#if defined(__cplusplus)
}
#endif

#endif
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