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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_

#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 

#include 

#include 

//#include 

//#include 

//#include 

//#include 

//#include 

#include 

//#include 

//#include     /* For (un)lock_kernel */

//#include 

//#include 

//#include 

#include 

//#include 

//#include 

//#include 

//#include 

//#include 

//#include 

#include "drm.h"

#include 

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

#define __OS_HAS_MTRR (defined(CONFIG_MTRR))

#include 

#include 

struct drm_file;

struct drm_device;

//#include "drm_os_linux.h"

#include "drm_hashtab.h"

#include "drm_mm.h"

#define DRM_UT_CORE 		0x01

#define DRM_UT_DRIVER		0x02

#define DRM_UT_KMS          0x04

#define DRM_UT_MODE         0x08

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

/* get_scanout_position() return flags */

#define DRM_SCANOUTPOS_VALID        (1 << 0)

#define DRM_SCANOUTPOS_INVBL        (1 << 1)

#define DRM_SCANOUTPOS_ACCURATE     (1 << 2)

extern void drm_ut_debug_printk(unsigned int request_level,

				const char *prefix,

				const char *function_name,

				const char *format, ...);

#define DRM_DEBUG_MODE(prefix, fmt, args...)    \

    do {                                        \

        dbgprintf("drm debug: %s" fmt,          \

                     __func__, ##args);         \

    } while (0)

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

    do {                                                        \

        printk("[" DRM_NAME ":%s] " fmt , __func__ , ##args);   \

    } while(0)

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

    do {                                                        \

        printk("[" DRM_NAME ":%s] " fmt , __func__ , ##args);   \

    } while(0)

#define dev_err(dev, format, arg...)            \

        printk("Error %s " format, __func__ , ## arg)

#define dev_warn(dev, format, arg...)            \

        printk("Warning %s " format, __func__ , ## arg)

#define dev_info(dev, format, arg...)       \

        printk("Info %s " format , __func__, ## arg)

static inline int drm_sysfs_connector_add(struct drm_connector *connector)

{ return 0; };

static inline void drm_sysfs_connector_remove(struct drm_connector *connector)

{ };

#if 0

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

/** \name DRM template customization defaults */

/*@{*/

/* driver capabilities and requirements mask */

#define DRIVER_USE_AGP     0x1

#define DRIVER_REQUIRE_AGP 0x2

#define DRIVER_USE_MTRR    0x4

#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_IRQ_VBL     0x100

#define DRIVER_DMA_QUEUE   0x200

#define DRIVER_FB_DMA      0x400

#define DRIVER_IRQ_VBL2    0x800

#define DRIVER_GEM         0x1000

#define DRIVER_MODESET     0x2000

#define DRIVER_USE_PLATFORM_DEVICE  0x4000

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

/** \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_KERNEL_CONTEXT    0	 /**< Change drm_resctx if changed */

#define DRM_RESERVED_CONTEXTS 1	 /**< Change drm_resctx if changed */

#define DRM_LOOPING_LIMIT     5000000

#define DRM_TIME_SLICE	      (HZ/20)  /**< Time slice for GLXContexts */

#define DRM_LOCK_SLICE	      1	/**< Time slice for lock, in jiffies */

#define DRM_FLAG_DEBUG	  0x01

#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)

#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, arg...) \

	printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* " fmt , __func__ , ##arg)

/**

 * Memory error output.

 *

 * \param area memory area where the error occurred.

 * \param fmt printf() like format string.

 * \param arg arguments

 */

#define DRM_MEM_ERROR(area, fmt, arg...) \

	printk(KERN_ERR "[" DRM_NAME ":%s:%s] *ERROR* " fmt , __func__, \

	       drm_mem_stats[area].name , ##arg)

#define DRM_INFO(fmt, arg...)  printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg)

/**

 * Debug output.

 *

 * \param fmt printf() like format string.

 * \param arg arguments

 */

#if DRM_DEBUG_CODE

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

	do {								\

		drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME, 		\

					__func__, fmt, ##args);		\

	} while (0)

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

	do {								\

		drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME,		\

					__func__, fmt, ##args);		\

	} while (0)

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

	do {								\

		drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, 		\

					 __func__, fmt, ##args);	\

	} while (0)

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

	do {								\

		drm_ut_debug_printk(DRM_UT_CORE, NULL,			\

					NULL, fmt, ##args);		\

	} while (0)

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

	do {								\

		drm_ut_debug_printk(DRM_UT_KMS, NULL,			\

					NULL, fmt, ##args);		\

	} while (0)

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

	do {								\

		drm_ut_debug_printk(DRM_UT_MODE, NULL,			\

					NULL, fmt, ##args);		\

	} while (0)

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

	do {								\

		drm_ut_debug_printk(DRM_UT_DRIVER, NULL,		\

					NULL, 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(fmt, arg...)		 do { } while (0)

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

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

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

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

#endif

/*@}*/

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

/** \name Internal types and structures */

/*@{*/

#define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)

#define DRM_LEFTCOUNT(x) (((x)->rp + (x)->count - (x)->wp) % ((x)->count + 1))

#define DRM_BUFCOUNT(x) ((x)->count - DRM_LEFTCOUNT(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

struct drm_ioctl_desc {

	unsigned int cmd;

	int flags;

	drm_ioctl_t *func;

	unsigned int cmd_drv;

};

/**

 * 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}

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 */

	wait_queue_head_t dma_wait;    /**< Processes waiting */

	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;

};

struct drm_freelist {

	int initialized;	       /**< Freelist in use */

	atomic_t count;		       /**< Number of free buffers */

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

	wait_queue_head_t waiting;     /**< Processes waiting on free bufs */

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

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

	atomic_t wfh;		       /**< If waiting for high mark */

	spinlock_t lock;

};

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;

	struct drm_freelist freelist;

};

/* 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);

};

/** File private data */

struct drm_file {

	int authenticated;

	pid_t pid;

	uid_t uid;

	drm_magic_t magic;

	unsigned long ioctl_count;

	struct list_head lhead;

	struct drm_minor *minor;

	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;

	struct file *filp;

	void *driver_priv;

	int is_master; /* this file private is a master for a minor */

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

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

	struct list_head fbs;

	wait_queue_head_t event_wait;

	struct list_head event_list;

	int event_space;

};

/** Wait queue */

struct drm_queue {

	atomic_t use_count;		/**< Outstanding uses (+1) */

	atomic_t finalization;		/**< Finalization in progress */

	atomic_t block_count;		/**< Count of processes waiting */

	atomic_t block_read;		/**< Queue blocked for reads */

	wait_queue_head_t read_queue;	/**< Processes waiting on block_read */

	atomic_t block_write;		/**< Queue blocked for writes */

	wait_queue_head_t write_queue;	/**< Processes waiting on block_write */

	atomic_t total_queued;		/**< Total queued statistic */

	atomic_t total_flushed;		/**< Total flushes statistic */

	atomic_t total_locks;		/**< Total locks statistics */

	enum drm_ctx_flags flags;	/**< Context preserving and 2D-only */

	struct drm_waitlist waitlist;	/**< Pending buffers */

	wait_queue_head_t flush_queue;	/**< Processes waiting until flush */

};

/**

 * 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 */

	DRM_AGP_MEM *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 {

	DRM_AGP_KERN 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;

};

/**

 * 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;

	struct drm_mm_node *file_offset_node;	/**< fake offset */

};

/**

 * Context handle list

 */

struct drm_ctx_list {

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

	drm_context_t handle;		/**< context handle */

	struct drm_file *tag;		/**< associated fd private data */

};

/* 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;

};

/**

 * GEM specific mm private for tracking GEM objects

 */

struct drm_gem_mm {

	struct drm_mm offset_manager;	/**< Offset mgmt for buffer objects */

	struct drm_open_hash offset_hash; /**< User token hash table for maps */

};

#endif

/**

 * 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 of this object. Each handle also holds a reference */

	atomic_t handle_count; /* number of handles on this object */

	/** Related drm device */

	struct drm_device *dev;

	/** File representing the shmem storage */

	struct file *filp;

	/* Mapping info for this object */

//	struct drm_map_list map_list;

	/**

	 * 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;

	void *driver_private;

};

#if 0

#include "drm_crtc.h"

/* per-master structure */

struct drm_master {

	struct kref refcount; /* refcount for this master */

	struct list_head head; /**< each minor contains a list of masters */

	struct drm_minor *minor; /**< link back to minor we are a master for */

	char *unique;			/**< Unique identifier: e.g., busid */

	int unique_len;			/**< Length of unique field */

	int unique_size;		/**< amount allocated */

	int blocked;			/**< Blocked due to VC switch? */

	/** \name Authentication */

	/*@{ */

	struct drm_open_hash magiclist;

	struct list_head magicfree;

	/*@} */

	struct drm_lock_data lock;	/**< Information on hardware lock */

	void *driver_priv; /**< Private structure for driver to use */

};

/* 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 bus_type;

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

	const char *(*get_name)(struct drm_device *dev);

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

	int (*set_unique)(struct drm_device *dev, struct drm_master *master,

			  struct drm_unique *unique);

	int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);

	/* hooks that are for PCI */

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

};

/**

 * 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 (*firstopen) (struct drm_device *);

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

	void (*preclose) (struct drm_device *, struct drm_file *file_priv);

	void (*postclose) (struct drm_device *, struct drm_file *);

	void (*lastclose) (struct drm_device *);

	int (*unload) (struct drm_device *);

	int (*suspend) (struct drm_device *, pm_message_t state);

	int (*resume) (struct drm_device *);

	int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);

	int (*dma_quiescent) (struct drm_device *);

	int (*context_dtor) (struct drm_device *dev, int context);

	/**

	 * 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 and

	 * make the enable_vblank() and disable_vblank() hooks into no-ops,

	 * leaving interrupts enabled at all times.

	 *

	 * 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 \c drm_device_is_agp.  Typically used to determine if a

	 * card is really attached to AGP or not.

	 *

	 * \param dev  DRM device handle

	 *

	 * \returns

	 * One of three values is returned depending on whether or not the

	 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP

	 * (return of 1), or may or may not be AGP (return of 2).

	 */

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

	/**

	 * Called by vblank timestamping code.

	 *

	 * Return the current display scanout position from a crtc.

	 *

	 * \param dev  DRM device.

	 * \param crtc Id of the crtc to query.

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

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

	 *

	 * 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,

				     int *vpos, int *hpos);

	/**

	 * 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 immmediately 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) (DRM_IRQ_ARGS);

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

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

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

	void (*reclaim_buffers) (struct drm_device *dev,

				 struct drm_file * file_priv);

	void (*reclaim_buffers_locked) (struct drm_device *dev,

					struct drm_file *file_priv);

	void (*reclaim_buffers_idlelocked) (struct drm_device *dev,

					    struct drm_file *file_priv);

	void (*set_version) (struct drm_device *dev,

			     struct drm_set_version *sv);

	/* Master routines */

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

	void (*master_destroy)(struct drm_device *dev, struct drm_master *master);

	/**

	 * master_set is called whenever the minor master is set.

	 * master_drop is called whenever the minor master is dropped.

	 */

	int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,

			  bool from_open);

	void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,

			    bool from_release);

	int (*debugfs_init)(struct drm_minor *minor);

	void (*debugfs_cleanup)(struct drm_minor *minor);

	/**

	 * Driver-specific constructor for drm_gem_objects, to set up

	 * obj->driver_private.

	 *

	 * Returns 0 on success.

	 */

	int (*gem_init_object) (struct drm_gem_object *obj);

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

	/* vga arb irq handler */

	void (*vgaarb_irq)(struct drm_device *dev, bool state);

	/* Driver private ops for this object */

	struct vm_operations_struct *gem_vm_ops;

	int major;

	int minor;

	int patchlevel;

	char *name;

	char *desc;

	char *date;

	u32 driver_features;

	int dev_priv_size;

	struct drm_ioctl_desc *ioctls;

	int num_ioctls;

	struct file_operations fops;

	struct pci_driver pci_driver;

	/* List of devices hanging off this driver */

	struct list_head device_list;

};

#define DRM_MINOR_UNASSIGNED 0

#define DRM_MINOR_LEGACY 1

#define DRM_MINOR_CONTROL 2

#define DRM_MINOR_RENDER 3

/**

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

 * be created by the drm core

 */

struct drm_debugfs_list {

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

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

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

};

/**

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

 */

struct drm_debugfs_node {

	struct list_head list;

	struct drm_minor *minor;

	struct drm_debugfs_list *debugfs_ent;

	struct dentry *dent;

};

/**

 * 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;

	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 */

	dev_t device;			/**< Device number for mknod */

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

	struct drm_device *dev;

	struct proc_dir_entry *proc_root;  /**< proc directory entry */

	struct drm_info_node proc_nodes;

	struct dentry *debugfs_root;

	struct drm_info_node debugfs_nodes;

	struct drm_master *master; /* currently active master for this node */

	struct list_head master_list;

	struct drm_mode_group mode_group;

};

#endif

/* mode specified on the command line */

struct drm_cmdline_mode {

	bool specified;

	bool refresh_specified;

	bool bpp_specified;

	int xres, yres;

	int bpp;

	int refresh;

	bool rb;

	bool interlace;

	bool cvt;

	bool margins;

	enum drm_connector_force force;

};

/**

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

 * may contain multiple heads.

 */

struct drm_device {

	struct list_head driver_item;	/**< list of devices per driver */

	char *devname;			/**< For /proc/interrupts */

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

	/** \name Locks */

	/*@{ */

    spinlock_t count_lock;      /**< For inuse, drm_device::open_count, drm_device::buf_use */

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

	/*@} */

	/** \name Usage Counters */

	/*@{ */

	int open_count;			/**< Outstanding files open */

   atomic_t ioctl_count;       /**< Outstanding IOCTLs pending */

   atomic_t vma_count;     /**< Outstanding vma areas open */

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

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

	/*@} */

	/** \name Performance counters */

	/*@{ */

	unsigned long counters;

//   enum drm_stat_type types[15];

   atomic_t counts[15];

	/*@} */

	struct list_head filelist;

	/** \name Memory management */

	/*@{ */

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

	int map_count;			/**< Number of mappable regions */

//   struct drm_open_hash map_hash;  /**< User token hash table for maps */

	/** \name Context handle management */

	/*@{ */

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

	int ctx_count;			/**< Number of context handles */

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

	struct idr ctx_idr;

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

	/*@} */

	/** \name DMA queues (contexts) */

	/*@{ */

	int queue_count;		/**< Number of active DMA queues */

	int queue_reserved;		  /**< Number of reserved DMA queues */

	int queue_slots;		/**< Actual length of queuelist */

//   struct drm_queue **queuelist;   /**< Vector of pointers to DMA queues */

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

	/*@} */

	/** \name Context support */

	/*@{ */

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

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

	__volatile__ long interrupt_flag; /**< Interruption handler flag */

	__volatile__ long dma_flag;	/**< DMA dispatch flag */

//   wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */

	int last_checked;		/**< Last context checked for DMA */

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

	unsigned long last_switch;	/**< jiffies at last context switch */

	/*@} */

//   struct work_struct work;

	/** \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.

	 */

	int vblank_disable_allowed;

//   wait_queue_head_t *vbl_queue;   /**< VBLANK wait queue */

   atomic_t *_vblank_count;        /**< number of VBLANK interrupts (driver must alloc the right number of counters) */

	struct timeval *_vblank_time;   /**< timestamp of current vblank_count (drivers must alloc right number of fields) */

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

   spinlock_t vbl_lock;

   atomic_t *vblank_refcount;      /* number of users of vblank interruptsper crtc */

	u32 *last_vblank;               /* protected by dev->vbl_lock, used */

					/* for wraparound handling */

	int *vblank_enabled;            /* so we don't call enable more than

					   once per disable */

	int *vblank_inmodeset;          /* Display driver is setting mode */

	u32 *last_vblank_wait;		/* Last vblank seqno waited per CRTC */

//   struct timer_list vblank_disable_timer;

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