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/**

 * \file drmP.h

 * Private header for Direct Rendering Manager

 *

 * \author Rickard E. (Rik) Faith 

 * \author Gareth Hughes 

 */

/*

 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.

 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.

 * Copyright (c) 2009-2010, Code Aurora Forum.

 * All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * 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 "AS IS", 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_P_H_

#define _DRM_P_H_

#define iowrite32(v, addr)      writel((v), (addr))

#ifdef __KERNEL__

#ifdef __alpha__

/* add include of current.h so that "current" is defined

 * before static inline funcs in wait.h. Doing this so we

 * can build the DRM (part of PI DRI). 4/21/2000 S + B */

#include 

#endif				/* __alpha__ */

#include 

#include 

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#include 

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#include 

//#include 

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#include 

#define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))

struct module;

struct drm_file;

struct drm_device;

struct device_node;

struct videomode;

struct reservation_object;

struct inode;

struct poll_table_struct;

struct drm_lock_data;

struct sg_table;

struct dma_buf;

//#include 

#include 

#include 

#define KHZ2PICOS(a) (1000000000UL/(a))

/* Flags and return codes for get_vblank_timestamp() driver function. */

#define DRM_CALLED_FROM_VBLIRQ 1

#define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)

#define DRM_VBLANKTIME_INVBL             (1 << 1)

/* get_scanout_position() return flags */

#define DRM_SCANOUTPOS_VALID        (1 << 0)

#define DRM_SCANOUTPOS_INVBL        (1 << 1)

#define DRM_SCANOUTPOS_ACCURATE     (1 << 2)

/*

 * 4 debug categories are defined:

 *

 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...

 *	 This is the category used by the DRM_DEBUG() macro.

 *

 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...

 *	   This is the category used by the DRM_DEBUG_DRIVER() macro.

 *

 * KMS: used in the modesetting code.

 *	This is the category used by the DRM_DEBUG_KMS() macro.

 *

 * PRIME: used in the prime code.

 *	  This is the category used by the DRM_DEBUG_PRIME() macro.

 *

 * Enabling verbose debug messages is done through the drm.debug parameter,

 * each category being enabled by a bit.

 *

 * drm.debug=0x1 will enable CORE messages

 * drm.debug=0x2 will enable DRIVER messages

 * drm.debug=0x3 will enable CORE and DRIVER messages

 * ...

 * drm.debug=0xf will enable all messages

 *

 * An interesting feature is that it's possible to enable verbose logging at

 * run-time by echoing the debug value in its sysfs node:

 *   # echo 0xf > /sys/module/drm/parameters/debug

 */

#define DRM_UT_CORE 		0x01

#define DRM_UT_DRIVER		0x02

#define DRM_UT_KMS          0x04

#define DRM_UT_PRIME		0x08

extern __printf(2, 3)

void drm_ut_debug_printk(const char *function_name,

				const char *format, ...);

extern __printf(2, 3)

int drm_err(const char *func, const char *format, ...);

/***********************************************************************/

/** \name DRM template customization defaults */

/*@{*/

/* driver capabilities and requirements mask */

#define DRIVER_USE_AGP     0x1

#define DRIVER_PCI_DMA     0x8

#define DRIVER_SG          0x10

#define DRIVER_HAVE_DMA    0x20

#define DRIVER_HAVE_IRQ    0x40

#define DRIVER_IRQ_SHARED  0x80

#define DRIVER_GEM         0x1000

#define DRIVER_MODESET     0x2000

#define DRIVER_PRIME       0x4000

#define DRIVER_RENDER      0x8000

#define DRIVER_BUS_PCI 0x1

#define DRIVER_BUS_PLATFORM 0x2

#define DRIVER_BUS_USB 0x3

#define DRIVER_BUS_HOST1X 0x4

/***********************************************************************/

/** \name Begin the DRM... */

/*@{*/

#define DRM_DEBUG_CODE 2	  /**< Include debugging code if > 1, then

				     also include looping detection. */

#define DRM_MAGIC_HASH_ORDER  4  /**< Size of key hash table. Must be power of 2. */

#define DRM_MAP_HASH_OFFSET 0x10000000

/*@}*/

/***********************************************************************/

/** \name Macros to make printk easier */

/*@{*/

/**

 * Error output.

 *

 * \param fmt printf() like format string.

 * \param arg arguments

 */

#define DRM_ERROR(fmt, ...)				\

	drm_err(__func__, fmt, ##__VA_ARGS__)

/**

 * Rate limited error output.  Like DRM_ERROR() but won't flood the log.

 *

 * \param fmt printf() like format string.

 * \param arg arguments

 */

#define DRM_ERROR_RATELIMITED(fmt, ...)				\

({									\

	static DEFINE_RATELIMIT_STATE(_rs,				\

				      DEFAULT_RATELIMIT_INTERVAL,	\

				      DEFAULT_RATELIMIT_BURST);		\

									\

	if (__ratelimit(&_rs))						\

		drm_err(__func__, fmt, ##__VA_ARGS__);			\

})

#define DRM_INFO(fmt, ...)				\

	printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)

#define DRM_INFO_ONCE(fmt, ...)				\

	printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)

/**

 * Debug output.

 *

 * \param fmt printf() like format string.

 * \param arg arguments

 */

#if DRM_DEBUG_CODE

#define DRM_DEBUG(fmt, args...)						\

    do {                                                    \

    printk(KERN_INFO "[" DRM_NAME "] " fmt, ##args);  \

	} while (0)

#define DRM_DEBUG_DRIVER(fmt, args...)					\

    do {                                                    \

    printk(KERN_INFO "[" DRM_NAME "] " fmt, ##args);  \

	} while (0)

#define DRM_DEBUG_KMS(fmt, args...)					\

	do {								\

    printk(KERN_INFO "[" DRM_NAME "] " fmt, ##args);  \

	} while (0)

#define DRM_DEBUG_PRIME(fmt, args...)					\

	do {								\

    printk(KERN_INFO "[" DRM_NAME "] " fmt, ##args);  \

	} while (0)

#else

#define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)

#define DRM_DEBUG_KMS(fmt, args...)	do { } while (0)

#define DRM_DEBUG_PRIME(fmt, args...)	do { } while (0)

#define DRM_DEBUG(fmt, arg...)		 do { } while (0)

#endif

/*@}*/

/***********************************************************************/

/** \name Internal types and structures */

/*@{*/

#define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)

#define DRM_IF_VERSION(maj, min) (maj << 16 | min)

/**

 * Test that the hardware lock is held by the caller, returning otherwise.

 *

 * \param dev DRM device.

 * \param filp file pointer of the caller.

 */

#define LOCK_TEST_WITH_RETURN( dev, _file_priv )				\

do {										\

	if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) ||	\

	    _file_priv->master->lock.file_priv != _file_priv)	{		\

		DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\

			   __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\

			   _file_priv->master->lock.file_priv, _file_priv);	\

		return -EINVAL;							\

	}									\

} while (0)

/**

 * Ioctl function type.

 *

 * \param inode device inode.

 * \param file_priv DRM file private pointer.

 * \param cmd command.

 * \param arg argument.

 */

typedef int drm_ioctl_t(struct drm_device *dev, void *data,

			struct drm_file *file_priv);

typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,

			       unsigned long arg);

#define DRM_IOCTL_NR(n)                _IOC_NR(n)

#define DRM_MAJOR       226

#define DRM_AUTH	0x1

#define	DRM_MASTER	0x2

#define DRM_ROOT_ONLY	0x4

#define DRM_CONTROL_ALLOW 0x8

#define DRM_UNLOCKED	0x10

#define DRM_RENDER_ALLOW 0x20

struct drm_ioctl_desc {

	unsigned int cmd;

	int flags;

	drm_ioctl_t *func;

	unsigned int cmd_drv;

	const char *name;

};

/**

 * Creates a driver or general drm_ioctl_desc array entry for the given

 * ioctl, for use by drm_ioctl().

 */

#define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags)			\

	[DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}

#if 0

struct drm_magic_entry {

	struct list_head head;

	struct drm_hash_item hash_item;

	struct drm_file *priv;

};

struct drm_vma_entry {

	struct list_head head;

	struct vm_area_struct *vma;

	pid_t pid;

};

/**

 * DMA buffer.

 */

struct drm_buf {

	int idx;		       /**< Index into master buflist */

	int total;		       /**< Buffer size */

	int order;		       /**< log-base-2(total) */

	int used;		       /**< Amount of buffer in use (for DMA) */

	unsigned long offset;	       /**< Byte offset (used internally) */

	void *address;		       /**< Address of buffer */

	unsigned long bus_address;     /**< Bus address of buffer */

	struct drm_buf *next;	       /**< Kernel-only: used for free list */

	__volatile__ int waiting;      /**< On kernel DMA queue */

	__volatile__ int pending;      /**< On hardware DMA queue */

	struct drm_file *file_priv;    /**< Private of holding file descr */

	int context;		       /**< Kernel queue for this buffer */

	int while_locked;	       /**< Dispatch this buffer while locked */

	enum {

		DRM_LIST_NONE = 0,

		DRM_LIST_FREE = 1,

		DRM_LIST_WAIT = 2,

		DRM_LIST_PEND = 3,

		DRM_LIST_PRIO = 4,

		DRM_LIST_RECLAIM = 5

	} list;			       /**< Which list we're on */

	int dev_priv_size;		 /**< Size of buffer private storage */

	void *dev_private;		 /**< Per-buffer private storage */

};

/** bufs is one longer than it has to be */

struct drm_waitlist {

	int count;			/**< Number of possible buffers */

	struct drm_buf **bufs;		/**< List of pointers to buffers */

	struct drm_buf **rp;			/**< Read pointer */

	struct drm_buf **wp;			/**< Write pointer */

	struct drm_buf **end;		/**< End pointer */

	spinlock_t read_lock;

	spinlock_t write_lock;

};

#endif

typedef struct drm_dma_handle {

	dma_addr_t busaddr;

	void *vaddr;

	size_t size;

} drm_dma_handle_t;

/**

 * Buffer entry.  There is one of this for each buffer size order.

 */

struct drm_buf_entry {

	int buf_size;			/**< size */

	int buf_count;			/**< number of buffers */

	struct drm_buf *buflist;		/**< buffer list */

	int seg_count;

	int page_order;

	struct drm_dma_handle **seglist;

	int low_mark;			/**< Low water mark */

	int high_mark;			/**< High water mark */

};

/* Event queued up for userspace to read */

struct drm_pending_event {

	struct drm_event *event;

	struct list_head link;

	struct drm_file *file_priv;

	pid_t pid; /* pid of requester, no guarantee it's valid by the time

		      we deliver the event, for tracing only */

	void (*destroy)(struct drm_pending_event *event);

};

/* initial implementaton using a linked list - todo hashtab */

struct drm_prime_file_private {

	struct list_head head;

	struct mutex lock;

};

/** File private data */

struct drm_file {

	unsigned authenticated :1;

	/* Whether we're master for a minor. Protected by master_mutex */

	unsigned is_master :1;

	/* true when the client has asked us to expose stereo 3D mode flags */

	unsigned stereo_allowed :1;

	/*

	 * true if client understands CRTC primary planes and cursor planes

	 * in the plane list

	 */

	unsigned universal_planes:1;

	struct list_head lhead;

	unsigned long lock_count;

	/** Mapping of mm object handles to object pointers. */

	struct idr object_idr;

	/** Lock for synchronization of access to object_idr. */

	spinlock_t table_lock;

	void *driver_priv;

	struct drm_master *master; /* master this node is currently associated with

				      N.B. not always minor->master */

	/**

	 * fbs - List of framebuffers associated with this file.

	 *

	 * Protected by fbs_lock. Note that the fbs list holds a reference on

	 * the fb object to prevent it from untimely disappearing.

	 */

	struct list_head fbs;

	struct mutex fbs_lock;

	wait_queue_head_t event_wait;

	struct list_head event_list;

	int event_space;

};

#if 0

/**

 * Lock data.

 */

struct drm_lock_data {

	struct drm_hw_lock *hw_lock;	/**< Hardware lock */

	/** Private of lock holder's file (NULL=kernel) */

	struct drm_file *file_priv;

	wait_queue_head_t lock_queue;	/**< Queue of blocked processes */

	unsigned long lock_time;	/**< Time of last lock in jiffies */

	spinlock_t spinlock;

	uint32_t kernel_waiters;

	uint32_t user_waiters;

	int idle_has_lock;

};

/**

 * DMA data.

 */

struct drm_device_dma {

	struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];	/**< buffers, grouped by their size order */

	int buf_count;			/**< total number of buffers */

	struct drm_buf **buflist;		/**< Vector of pointers into drm_device_dma::bufs */

	int seg_count;

	int page_count;			/**< number of pages */

	unsigned long *pagelist;	/**< page list */

	unsigned long byte_count;

	enum {

		_DRM_DMA_USE_AGP = 0x01,

		_DRM_DMA_USE_SG = 0x02,

		_DRM_DMA_USE_FB = 0x04,

		_DRM_DMA_USE_PCI_RO = 0x08

	} flags;

};

/**

 * AGP memory entry.  Stored as a doubly linked list.

 */

struct drm_agp_mem {

	unsigned long handle;		/**< handle */

	struct agp_memory *memory;

	unsigned long bound;		/**< address */

	int pages;

	struct list_head head;

};

/**

 * AGP data.

 *

 * \sa drm_agp_init() and drm_device::agp.

 */

struct drm_agp_head {

	struct agp_kern_info agp_info;		/**< AGP device information */

	struct list_head memory;

	unsigned long mode;		/**< AGP mode */

	struct agp_bridge_data *bridge;

	int enabled;			/**< whether the AGP bus as been enabled */

	int acquired;			/**< whether the AGP device has been acquired */

	unsigned long base;

	int agp_mtrr;

	int cant_use_aperture;

	unsigned long page_mask;

};

/**

 * Scatter-gather memory.

 */

struct drm_sg_mem {

	unsigned long handle;

	void *virtual;

	int pages;

	struct page **pagelist;

	dma_addr_t *busaddr;

};

struct drm_sigdata {

	int context;

	struct drm_hw_lock *lock;

};

#endif

/**

 * Kernel side of a mapping

 */

struct drm_local_map {

	resource_size_t offset;	 /**< Requested physical address (0 for SAREA)*/

	unsigned long size;	 /**< Requested physical size (bytes) */

	enum drm_map_type type;	 /**< Type of memory to map */

	enum drm_map_flags flags;	 /**< Flags */

	void *handle;		 /**< User-space: "Handle" to pass to mmap() */

				 /**< Kernel-space: kernel-virtual address */

	int mtrr;		 /**< MTRR slot used */

};

typedef struct drm_local_map drm_local_map_t;

/**

 * Mappings list

 */

struct drm_map_list {

	struct list_head head;		/**< list head */

	struct drm_hash_item hash;

	struct drm_local_map *map;	/**< mapping */

	uint64_t user_token;

	struct drm_master *master;

};

/* location of GART table */

#define DRM_ATI_GART_MAIN 1

#define DRM_ATI_GART_FB   2

#define DRM_ATI_GART_PCI 1

#define DRM_ATI_GART_PCIE 2

#define DRM_ATI_GART_IGP 3

struct drm_ati_pcigart_info {

	int gart_table_location;

	int gart_reg_if;

	void *addr;

	dma_addr_t bus_addr;

	dma_addr_t table_mask;

	struct drm_dma_handle *table_handle;

	struct drm_local_map mapping;

	int table_size;

};

/**

 * This structure defines the drm_mm memory object, which will be used by the

 * DRM for its buffer objects.

 */

struct drm_gem_object {

	/** Reference count of this object */

	struct kref refcount;

	/**

	 * handle_count - gem file_priv handle count of this object

	 *

	 * Each handle also holds a reference. Note that when the handle_count

	 * drops to 0 any global names (e.g. the id in the flink namespace) will

	 * be cleared.

	 *

	 * Protected by dev->object_name_lock.

	 * */

	unsigned handle_count;

	/** Related drm device */

	struct drm_device *dev;

	/** File representing the shmem storage */

	struct file *filp;

	/* Mapping info for this object */

	struct drm_vma_offset_node vma_node;

	/**

	 * Size of the object, in bytes.  Immutable over the object's

	 * lifetime.

	 */

	size_t size;

	/**

	 * Global name for this object, starts at 1. 0 means unnamed.

	 * Access is covered by the object_name_lock in the related drm_device

	 */

	int name;

	/**

	 * Memory domains. These monitor which caches contain read/write data

	 * related to the object. When transitioning from one set of domains

	 * to another, the driver is called to ensure that caches are suitably

	 * flushed and invalidated

	 */

	uint32_t read_domains;

	uint32_t write_domain;

	/**

	 * While validating an exec operation, the

	 * new read/write domain values are computed here.

	 * They will be transferred to the above values

	 * at the point that any cache flushing occurs

	 */

	uint32_t pending_read_domains;

	uint32_t pending_write_domain;

	/**

	 * dma_buf - dma buf associated with this GEM object

	 *

	 * Pointer to the dma-buf associated with this gem object (either

	 * through importing or exporting). We break the resulting reference

	 * loop when the last gem handle for this object is released.

	 *

	 * Protected by obj->object_name_lock

	 */

	struct dma_buf *dma_buf;

};

#include 

/**

 * struct drm_master - drm master structure

 *

 * @refcount: Refcount for this master object.

 * @minor: Link back to minor char device we are master for. Immutable.

 * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.

 * @unique_len: Length of unique field. Protected by drm_global_mutex.

 * @unique_size: Amount allocated. Protected by drm_global_mutex.

 * @magiclist: Hash of used authentication tokens. Protected by struct_mutex.

 * @magicfree: List of used authentication tokens. Protected by struct_mutex.

 * @lock: DRI lock information.

 * @driver_priv: Pointer to driver-private information.

 */

struct drm_master {

	struct kref refcount;

	struct drm_minor *minor;

	char *unique;

	int unique_len;

	int unique_size;

//	struct drm_open_hash magiclist;

//	struct list_head magicfree;

//	struct drm_lock_data lock;

	void *driver_priv;

};

/* Size of ringbuffer for vblank timestamps. Just double-buffer

 * in initial implementation.

 */

#define DRM_VBLANKTIME_RBSIZE 2

/* Flags and return codes for get_vblank_timestamp() driver function. */

#define DRM_CALLED_FROM_VBLIRQ 1

#define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)

#define DRM_VBLANKTIME_INVBL             (1 << 1)

/* get_scanout_position() return flags */

#define DRM_SCANOUTPOS_VALID        (1 << 0)

#define DRM_SCANOUTPOS_INVBL        (1 << 1)

#define DRM_SCANOUTPOS_ACCURATE     (1 << 2)

struct drm_bus {

	int (*set_busid)(struct drm_device *dev, struct drm_master *master);

};

/**

 * DRM driver structure. This structure represent the common code for

 * a family of cards. There will one drm_device for each card present

 * in this family

 */

struct drm_driver {

	int (*load) (struct drm_device *, unsigned long flags);

	int (*open) (struct drm_device *, struct drm_file *);

	/**

	 * get_vblank_counter - get raw hardware vblank counter

	 * @dev: DRM device

	 * @crtc: counter to fetch

	 *

	 * Driver callback for fetching a raw hardware vblank counter for @crtc.

	 * If a device doesn't have a hardware counter, the driver can simply

	 * return the value of drm_vblank_count. The DRM core will account for

	 * missed vblank events while interrupts where disabled based on system

	 * timestamps.

	 *

	 * Wraparound handling and loss of events due to modesetting is dealt

	 * with in the DRM core code.

	 *

	 * RETURNS

	 * Raw vblank counter value.

	 */

	u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);

	/**

	 * enable_vblank - enable vblank interrupt events

	 * @dev: DRM device

	 * @crtc: which irq to enable

	 *

	 * Enable vblank interrupts for @crtc.  If the device doesn't have

	 * a hardware vblank counter, this routine should be a no-op, since

	 * interrupts will have to stay on to keep the count accurate.

	 *

	 * RETURNS

	 * Zero on success, appropriate errno if the given @crtc's vblank

	 * interrupt cannot be enabled.

	 */

	int (*enable_vblank) (struct drm_device *dev, int crtc);

	/**

	 * disable_vblank - disable vblank interrupt events

	 * @dev: DRM device

	 * @crtc: which irq to enable

	 *

	 * Disable vblank interrupts for @crtc.  If the device doesn't have

	 * a hardware vblank counter, this routine should be a no-op, since

	 * interrupts will have to stay on to keep the count accurate.

	 */

	void (*disable_vblank) (struct drm_device *dev, int crtc);

	/**

	 * Called by vblank timestamping code.

	 *

	 * Return the current display scanout position from a crtc, and an

	 * optional accurate ktime_get timestamp of when position was measured.

	 *

	 * \param dev  DRM device.

	 * \param crtc Id of the crtc to query.

	 * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).

	 * \param *vpos Target location for current vertical scanout position.

	 * \param *hpos Target location for current horizontal scanout position.

	 * \param *stime Target location for timestamp taken immediately before

	 *               scanout position query. Can be NULL to skip timestamp.

	 * \param *etime Target location for timestamp taken immediately after

	 *               scanout position query. Can be NULL to skip timestamp.

	 *

	 * Returns vpos as a positive number while in active scanout area.

	 * Returns vpos as a negative number inside vblank, counting the number

	 * of scanlines to go until end of vblank, e.g., -1 means "one scanline

	 * until start of active scanout / end of vblank."

	 *

	 * \return Flags, or'ed together as follows:

	 *

	 * DRM_SCANOUTPOS_VALID = Query successful.

	 * DRM_SCANOUTPOS_INVBL = Inside vblank.

	 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of

	 * this flag means that returned position may be offset by a constant

	 * but unknown small number of scanlines wrt. real scanout position.

	 *

	 */

	int (*get_scanout_position) (struct drm_device *dev, int crtc,

				     unsigned int flags,

                     int *vpos, int *hpos, void *stime,

                     void *etime);

	/**

	 * Called by \c drm_get_last_vbltimestamp. Should return a precise

	 * timestamp when the most recent VBLANK interval ended or will end.

	 *

	 * Specifically, the timestamp in @vblank_time should correspond as

	 * closely as possible to the time when the first video scanline of

	 * the video frame after the end of VBLANK will start scanning out,

	 * the time immediately after end of the VBLANK interval. If the

	 * @crtc is currently inside VBLANK, this will be a time in the future.

	 * If the @crtc is currently scanning out a frame, this will be the

	 * past start time of the current scanout. This is meant to adhere

	 * to the OpenML OML_sync_control extension specification.

	 *

	 * \param dev dev DRM device handle.

	 * \param crtc crtc for which timestamp should be returned.

	 * \param *max_error Maximum allowable timestamp error in nanoseconds.

	 *                   Implementation should strive to provide timestamp

	 *                   with an error of at most *max_error nanoseconds.

	 *                   Returns true upper bound on error for timestamp.

	 * \param *vblank_time Target location for returned vblank timestamp.

	 * \param flags 0 = Defaults, no special treatment needed.

	 * \param       DRM_CALLED_FROM_VBLIRQ = Function is called from vblank

	 *	        irq handler. Some drivers need to apply some workarounds

	 *              for gpu-specific vblank irq quirks if flag is set.

	 *

	 * \returns

	 * Zero if timestamping isn't supported in current display mode or a

	 * negative number on failure. A positive status code on success,

	 * which describes how the vblank_time timestamp was computed.

	 */

	int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,

				     int *max_error,

				     struct timeval *vblank_time,

				     unsigned flags);

	/* these have to be filled in */

	irqreturn_t(*irq_handler) (int irq, void *arg);

	void (*irq_preinstall) (struct drm_device *dev);

	int (*irq_postinstall) (struct drm_device *dev);

	void (*irq_uninstall) (struct drm_device *dev);

	/**

	 * Driver-specific constructor for drm_gem_objects, to set up

	 * obj->driver_private.

	 *

	 * Returns 0 on success.

	 */

	void (*gem_free_object) (struct drm_gem_object *obj);

	int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);

	void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);

	u32 driver_features;

	int dev_priv_size;

};

enum drm_minor_type {

	DRM_MINOR_LEGACY,

	DRM_MINOR_CONTROL,

	DRM_MINOR_RENDER,

	DRM_MINOR_CNT,

};

/**

 * Info file list entry. This structure represents a debugfs or proc file to

 * be created by the drm core

 */

struct drm_info_list {

	const char *name; /** file name */

//   int (*show)(struct seq_file*, void*); /** show callback */

	u32 driver_features; /**< Required driver features for this entry */

	void *data;

};

/**

 * debugfs node structure. This structure represents a debugfs file.

 */

struct drm_info_node {

	struct list_head list;

	struct drm_minor *minor;

	const struct drm_info_list *info_ent;

	struct dentry *dent;

};

/**

 * DRM minor structure. This structure represents a drm minor number.

 */

struct drm_minor {

	int index;			/**< Minor device number */

	int type;                       /**< Control or render */

//   struct device kdev;     /**< Linux device */

	struct drm_device *dev;

	struct dentry *debugfs_root;

	struct list_head debugfs_list;

	struct mutex debugfs_lock; /* Protects debugfs_list. */

	/* currently active master for this node. Protected by master_mutex */

	struct drm_master *master;

	struct drm_mode_group mode_group;

};

/**

 * DRM device structure. This structure represent a complete card that

 * may contain multiple heads.

 */

struct drm_device {

	struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */

	int if_version;			/**< Highest interface version set */

	struct device *dev;		/**< Device structure of bus-device */

	struct drm_driver *driver;	/**< DRM driver managing the device */

	void *dev_private;		/**< DRM driver private data */

	struct drm_minor *primary;		/**< Primary node */

	atomic_t unplugged;			/**< Flag whether dev is dead */

	/** \name Locks */

	/*@{ */

	struct mutex struct_mutex;	/**< For others */

	struct mutex master_mutex;      /**< For drm_minor::master and drm_file::is_master */

	/*@} */

	/** \name Usage Counters */

	/*@{ */

	int open_count;			/**< Outstanding files open, protected by drm_global_mutex. */

	spinlock_t buf_lock;		/**< For drm_device::buf_use and a few other things. */

	int buf_use;			/**< Buffers in use -- cannot alloc */

   atomic_t buf_alloc;     /**< Buffer allocation in progress */

	/*@} */

	struct list_head filelist;

	/** \name Memory management */

	/*@{ */

	struct list_head maplist;	/**< Linked list of regions */

	/** \name Context handle management */

	/*@{ */

	struct list_head ctxlist;	/**< Linked list of context handles */

	struct mutex ctxlist_mutex;	/**< For ctxlist */

	struct idr ctx_idr;

	struct list_head vmalist;	/**< List of vmas (for debugging) */

	/*@} */

	/** \name DMA support */

	/*@{ */

//   struct drm_device_dma *dma;     /**< Optional pointer for DMA support */

	/*@} */

	/** \name Context support */

	/*@{ */

	bool irq_enabled;		/**< True if irq handler is enabled */

	int irq;

	__volatile__ long context_flag;	/**< Context swapping flag */

	int last_context;		/**< Last current context */

	/*@} */

	/** \name VBLANK IRQ support */

	/*@{ */

	/*

	 * At load time, disabling the vblank interrupt won't be allowed since

	 * old clients may not call the modeset ioctl and therefore misbehave.

	 * Once the modeset ioctl *has* been called though, we can safely

	 * disable them when unused.

	 */

	bool vblank_disable_allowed;

	/* array of size num_crtcs */

	struct drm_vblank_crtc *vblank;

	spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */

	spinlock_t vbl_lock;

	u32 max_vblank_count;           /**< size of vblank counter register */

	/**

	 * List of events

	 */

	struct list_head vblank_event_list;

	spinlock_t event_lock;

	/*@} */

//   struct drm_agp_head *agp;   /**< AGP data */

	struct pci_dev *pdev;		/**< PCI device structure */

	unsigned int num_crtcs;                  /**< Number of CRTCs on this device */

        struct drm_mode_config mode_config;	/**< Current mode config */

	/** \name GEM information */

	/*@{ */

	struct mutex object_name_lock;

	struct idr object_name_idr;

	struct drm_vma_offset_manager *vma_offset_manager;

	/*@} */

	int switch_power_state;

};

#define DRM_SWITCH_POWER_ON 0

#define DRM_SWITCH_POWER_OFF 1

#define DRM_SWITCH_POWER_CHANGING 2

#define DRM_SWITCH_POWER_DYNAMIC_OFF 3

static __inline__ int drm_core_check_feature(struct drm_device *dev,

					     int feature)

{

	return ((dev->driver->driver_features & feature) ? 1 : 0);

}

static inline void drm_device_set_unplugged(struct drm_device *dev)

{

	smp_wmb();

	atomic_set(&dev->unplugged, 1);

}

static inline int drm_device_is_unplugged(struct drm_device *dev)

{

	int ret = atomic_read(&dev->unplugged);

	smp_rmb();

	return ret;

}

/******************************************************************/

/** \name Internal function definitions */

/*@{*/

				/* Driver support (drm_drv.h) */

extern long drm_ioctl(struct file *filp,

		     unsigned int cmd, unsigned long arg);

extern long drm_compat_ioctl(struct file *filp,

			     unsigned int cmd, unsigned long arg);

extern int drm_lastclose(struct drm_device *dev);

extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);

				/* Device support (drm_fops.h) */

extern struct mutex drm_global_mutex;

extern int drm_open(struct inode *inode, struct file *filp);

extern ssize_t drm_read(struct file *filp, char __user *buffer,

			size_t count, loff_t *offset);

extern int drm_release(struct inode *inode, struct file *filp);

				/* Mapping support (drm_vm.h) */

extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);

extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);

extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);

extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);

extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);

				/* Memory management support (drm_memory.h) */

#include 

				/* Misc. IOCTL support (drm_ioctl.h) */

extern int drm_irq_by_busid(struct drm_device *dev, void *data,

			    struct drm_file *file_priv);

extern int drm_getunique(struct drm_device *dev, void *data,

			 struct drm_file *file_priv);

extern int drm_setunique(struct drm_device *dev, void *data,

			 struct drm_file *file_priv);

extern int drm_getmap(struct drm_device *dev, void *data,

		      struct drm_file *file_priv);

extern int drm_getclient(struct drm_device *dev, void *data,

			 struct drm_file *file_priv);

extern int drm_getstats(struct drm_device *dev, void *data,

			struct drm_file *file_priv);

extern int drm_getcap(struct drm_device *dev, void *data,

		      struct drm_file *file_priv);

extern int drm_setclientcap(struct drm_device *dev, void *data,

			    struct drm_file *file_priv);

extern int drm_setversion(struct drm_device *dev, void *data,

			  struct drm_file *file_priv);

extern int drm_noop(struct drm_device *dev, void *data,

		    struct drm_file *file_priv);

				/* Authentication IOCTL support (drm_auth.h) */

extern int drm_getmagic(struct drm_device *dev, void *data,

			struct drm_file *file_priv);

extern int drm_authmagic(struct drm_device *dev, void *data,

			 struct drm_file *file_priv);

extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);

/* Cache management (drm_cache.c) */

void drm_clflush_pages(struct page *pages[], unsigned long num_pages);

void drm_clflush_sg(struct sg_table *st);

void drm_clflush_virt_range(void *addr, unsigned long length);