drmP.h

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/*
 * 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 <asm/current.h>
#endif              /* __alpha__ */
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/file.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/jiffies.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/cdev.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#if defined(__alpha__) || defined(__powerpc__)
#include <asm/pgtable.h>    /* For pte_wrprotect */
#endif
#include <asm/io.h>
#include <asm/mman.h>
#include <asm/uaccess.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
#include <linux/types.h>
#include <linux/agp_backend.h>
#endif
#include <linux/workqueue.h>
#include <linux/poll.h>
#include <asm/pgalloc.h>
#include <drm/drm.h>
#include <drm/drm_sarea.h>

#include <linux/idr.h>

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

struct module;

struct drm_file;
struct drm_device;

#include <drm/drm_os_linux.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_mm.h>

#define DRM_UT_CORE         0x01
#define DRM_UT_DRIVER       0x02
#define DRM_UT_KMS      0x04
#define DRM_UT_PRIME        0x08
/*
 * Three debug levels are defined.
 * drm_core, drm_driver, drm_kms
 * drm_core level can be used in the generic drm code. For example:
 *  drm_ioctl, drm_mm, drm_memory
 * The macro definition of DRM_DEBUG is used.
 *  DRM_DEBUG(fmt, args...)
 *  The debug info by using the DRM_DEBUG can be obtained by adding
 *  the boot option of "drm.debug=1".
 *
 * drm_driver level can be used in the specific drm driver. It is used
 * to add the debug info related with the drm driver. For example:
 * i915_drv, i915_dma, i915_gem, radeon_drv,
 *  The macro definition of DRM_DEBUG_DRIVER can be used.
 *  DRM_DEBUG_DRIVER(fmt, args...)
 *  The debug info by using the DRM_DEBUG_DRIVER can be obtained by
 *  adding the boot option of "drm.debug=0x02"
 *
 * drm_kms level can be used in the KMS code related with specific drm driver.
 * It is used to add the debug info related with KMS mode. For example:
 * the connector/crtc ,
 *  The macro definition of DRM_DEBUG_KMS can be used.
 *  DRM_DEBUG_KMS(fmt, args...)
 *  The debug info by using the DRM_DEBUG_KMS can be obtained by
 *  adding the boot option of "drm.debug=0x04"
 *
 * If we add the boot option of "drm.debug=0x06", we can get the debug info by
 * using the DRM_DEBUG_KMS and DRM_DEBUG_DRIVER.
 * If we add the boot option of "drm.debug=0x05", we can get the debug info by
 * using the DRM_DEBUG_KMS and DRM_DEBUG.
 */

extern __printf(4, 5)
void drm_ut_debug_printk(unsigned int request_level,
             const char *prefix,
             const char *function_name,
             const char *format, ...);
extern __printf(2, 3)
int drm_err(const char *func, const char *format, ...);

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

/* 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_PRIME       0x4000

#define DRIVER_BUS_PCI 0x1
#define DRIVER_BUS_PLATFORM 0x2
#define DRIVER_BUS_USB 0x3

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

#define DRM_DEBUG_CODE 2      
#define DRM_MAGIC_HASH_ORDER  4  
#define DRM_KERNEL_CONTEXT    0  
#define DRM_RESERVED_CONTEXTS 1  
#define DRM_LOOPING_LIMIT     5000000
#define DRM_TIME_SLICE        (HZ/20)  
#define DRM_LOCK_SLICE        1 
#define DRM_FLAG_DEBUG    0x01

#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
#define DRM_MAP_HASH_OFFSET 0x10000000

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

#define DRM_ERROR(fmt, ...)             \
    drm_err(__func__, fmt, ##__VA_ARGS__)

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

#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_DEBUG_PRIME(fmt, args...)                   \
    do {                                \
        drm_ut_debug_printk(DRM_UT_PRIME, 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_PRIME(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

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

#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)

#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)

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;
};

#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;
};

struct drm_buf {
    int idx;               
    int total;             
    int order;             
    int used;              
    unsigned long offset;          
    void *address;             
    unsigned long bus_address;     
    struct drm_buf *next;          
    __volatile__ int waiting;      
    __volatile__ int pending;      
    struct drm_file *file_priv;    
    int context;               
    int 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;                
    int dev_priv_size;       
    void *dev_private;       
};

struct drm_waitlist {
    int count;          
    struct drm_buf **bufs;      
    struct drm_buf **rp;            
    struct drm_buf **wp;            
    struct drm_buf **end;       
    spinlock_t read_lock;
    spinlock_t write_lock;
};

struct drm_freelist {
    int initialized;           
    atomic_t count;            
    struct drm_buf *next;          
    wait_queue_head_t waiting;     
    int low_mark;              
    int high_mark;             
    atomic_t wfh;              
    spinlock_t lock;
};

typedef struct drm_dma_handle {
    dma_addr_t busaddr;
    void *vaddr;
    size_t size;
} drm_dma_handle_t;

struct drm_buf_entry {
    int buf_size;           
    int buf_count;          
    struct drm_buf *buflist;        
    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);
};

/* initial implementaton using a linked list - todo hashtab */
struct drm_prime_file_private {
    struct list_head head;
    struct mutex lock;
};

struct drm_file {
    int authenticated;
    struct pid *pid;
    kuid_t uid;
    drm_magic_t magic;
    unsigned long ioctl_count;
    struct list_head lhead;
    struct drm_minor *minor;
    unsigned long lock_count;

    struct idr 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;

    struct drm_prime_file_private prime;
};

struct drm_queue {
    atomic_t use_count;     
    atomic_t finalization;      
    atomic_t block_count;       
    atomic_t block_read;        
    wait_queue_head_t read_queue;   
    atomic_t block_write;       
    wait_queue_head_t write_queue;  
    atomic_t total_queued;      
    atomic_t total_flushed;     
    atomic_t total_locks;       
    enum drm_ctx_flags flags;   
    struct drm_waitlist waitlist;   
    wait_queue_head_t flush_queue;  
};

struct drm_lock_data {
    struct drm_hw_lock *hw_lock;    
    struct drm_file *file_priv;
    wait_queue_head_t lock_queue;   
    unsigned long lock_time;    
    spinlock_t spinlock;
    uint32_t kernel_waiters;
    uint32_t user_waiters;
    int idle_has_lock;
};

struct drm_device_dma {

    struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];   
    int buf_count;          
    struct drm_buf **buflist;       
    int seg_count;
    int page_count;         
    unsigned long *pagelist;    
    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;

};

struct drm_agp_mem {
    unsigned long handle;       
    DRM_AGP_MEM *memory;
    unsigned long bound;        
    int pages;
    struct list_head head;
};

struct drm_agp_head {
    DRM_AGP_KERN agp_info;      
    struct list_head memory;
    unsigned long mode;     
    struct agp_bridge_data *bridge;
    int enabled;            
    int acquired;           
    unsigned long base;
    int agp_mtrr;
    int cant_use_aperture;
    unsigned long page_mask;
};

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;
};


struct drm_local_map {
    resource_size_t offset;  
    unsigned long size;  
    enum drm_map_type type;  
    enum drm_map_flags flags;    
    void *handle;        
    int mtrr;        
};

typedef struct drm_local_map drm_local_map_t;

struct drm_map_list {
    struct list_head head;      
    struct drm_hash_item hash;
    struct drm_local_map *map;  
    uint64_t user_token;
    struct drm_master *master;
    struct drm_mm_node *file_offset_node;   
};

struct drm_ctx_list {
    struct list_head head;      
    drm_context_t handle;       
    struct drm_file *tag;       
};

/* 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;
};

struct drm_gem_mm {
    struct drm_mm offset_manager;   
    struct drm_open_hash offset_hash; 
};

struct drm_gem_object {
    struct kref refcount;

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

    struct drm_device *dev;

    struct file *filp;

    /* Mapping info for this object */
    struct drm_map_list map_list;

    size_t size;

    int name;

    uint32_t read_domains;
    uint32_t write_domain;

    uint32_t pending_read_domains;
    uint32_t pending_write_domain;

    void *driver_private;

    /* dma buf exported from this GEM object */
    struct dma_buf *export_dma_buf;

    /* dma buf attachment backing this object */
    struct dma_buf_attachment *import_attach;
};

#include <drm/drm_crtc.h>

/* per-master structure */
struct drm_master {

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

    struct list_head head; 
    struct drm_minor *minor; 
    char *unique;           
    int unique_len;         
    int unique_size;        
    int blocked;            

    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 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);

};

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);

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

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

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

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

    int (*get_scanout_position) (struct drm_device *dev, int crtc,
                     int *vpos, int *hpos);

    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 (*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);
    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);

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

    /* prime: */
    /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
    int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
                uint32_t handle, uint32_t flags, int *prime_fd);
    /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
    int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
                int prime_fd, uint32_t *handle);
    /* export GEM -> dmabuf */
    struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
                struct drm_gem_object *obj, int flags);
    /* import dmabuf -> GEM */
    struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
                struct dma_buf *dma_buf);

    /* vga arb irq handler */
    void (*vgaarb_irq)(struct drm_device *dev, bool state);

    /* dumb alloc support */
    int (*dumb_create)(struct drm_file *file_priv,
               struct drm_device *dev,
               struct drm_mode_create_dumb *args);
    int (*dumb_map_offset)(struct drm_file *file_priv,
                   struct drm_device *dev, uint32_t handle,
                   uint64_t *offset);
    int (*dumb_destroy)(struct drm_file *file_priv,
                struct drm_device *dev,
                uint32_t handle);

    /* Driver private ops for this object */
    const 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;
    const struct file_operations *fops;
    union {
        struct pci_driver *pci;
        struct platform_device *platform_device;
        struct usb_driver *usb;
    } kdriver;
    struct drm_bus *bus;

    /* 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


struct drm_debugfs_list {
    const char *name; 
    int (*show)(struct seq_file*, void*); 
    u32 driver_features; 
};

struct drm_debugfs_node {
    struct list_head list;
    struct drm_minor *minor;
    struct drm_debugfs_list *debugfs_ent;
    struct dentry *dent;
};

struct drm_info_list {
    const char *name; 
    int (*show)(struct seq_file*, void*); 
    u32 driver_features; 
    void *data;
};

struct drm_info_node {
    struct list_head list;
    struct drm_minor *minor;
    struct drm_info_list *info_ent;
    struct dentry *dent;
};

struct drm_minor {
    int index;          
    int type;                       
    dev_t device;           
    struct device kdev;     
    struct drm_device *dev;

    struct proc_dir_entry *proc_root;  
    struct drm_info_node proc_nodes;
    struct dentry *debugfs_root;

    struct list_head debugfs_list;
    struct mutex debugfs_lock; /* Protects debugfs_list. */

    struct drm_master *master; /* currently active master for this node */
    struct list_head master_list;
    struct drm_mode_group mode_group;
};

/* 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;
};


struct drm_pending_vblank_event {
    struct drm_pending_event base;
    int pipe;
    struct drm_event_vblank event;
};

struct drm_device {
    struct list_head driver_item;   
    char *devname;          
    int if_version;         

    spinlock_t count_lock;      
    struct mutex struct_mutex;  


    int open_count;         
    atomic_t ioctl_count;       
    atomic_t vma_count;     
    int buf_use;            
    atomic_t buf_alloc;     


    unsigned long counters;
    enum drm_stat_type types[15];
    atomic_t counts[15];
    struct list_head filelist;


    struct list_head maplist;   
    int map_count;          
    struct drm_open_hash map_hash;  

    struct list_head ctxlist;   
    int ctx_count;          
    struct mutex ctxlist_mutex; 
    struct idr ctx_idr;

    struct list_head vmalist;   


    struct drm_device_dma *dma;     


    int irq_enabled;        
    __volatile__ long context_flag; 
    __volatile__ long interrupt_flag; 
    __volatile__ long dma_flag; 
    wait_queue_head_t context_wait; 
    int last_checked;       
    int last_context;       
    unsigned long last_switch;  

    struct work_struct work;

    /*
     * 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;   
    atomic_t *_vblank_count;        
    struct timeval *_vblank_time;   
    spinlock_t vblank_time_lock;    
    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;           
    struct list_head vblank_event_list;
    spinlock_t event_lock;

    cycles_t ctx_start;
    cycles_t lck_start;

    struct fasync_struct *buf_async;
    wait_queue_head_t buf_readers;  
    wait_queue_head_t buf_writers;  
    struct drm_agp_head *agp;   
    struct device *dev;             
    struct pci_dev *pdev;       
    int pci_vendor;         
    int pci_device;         
#ifdef __alpha__
    struct pci_controller *hose;
#endif

    struct platform_device *platformdev; 
    struct usb_device *usbdev;

    struct drm_sg_mem *sg;  
    unsigned int num_crtcs;                  
    void *dev_private;      
    void *mm_private;
    struct address_space *dev_mapping;
    struct drm_sigdata sigdata;    
    sigset_t sigmask;

    struct drm_driver *driver;
    struct drm_local_map *agp_buffer_map;
    unsigned int agp_buffer_token;
    struct drm_minor *control;      
    struct drm_minor *primary;      
        struct drm_mode_config mode_config; 

    spinlock_t object_name_lock;
    struct idr object_name_idr;
    int switch_power_state;

    atomic_t unplugged; /* device has been unplugged or gone away */
};

#define DRM_SWITCH_POWER_ON 0
#define DRM_SWITCH_POWER_OFF 1
#define DRM_SWITCH_POWER_CHANGING 2

static __inline__ int drm_core_check_feature(struct drm_device *dev,
                         int feature)
{
    return ((dev->driver->driver_features & feature) ? 1 : 0);
}

static inline int drm_dev_to_irq(struct drm_device *dev)
{
    return dev->driver->bus->get_irq(dev);
}


#if __OS_HAS_AGP
static inline int drm_core_has_AGP(struct drm_device *dev)
{
    return drm_core_check_feature(dev, DRIVER_USE_AGP);
}
#else
#define drm_core_has_AGP(dev) (0)
#endif

#if __OS_HAS_MTRR
static inline int drm_core_has_MTRR(struct drm_device *dev)
{
    return drm_core_check_feature(dev, DRIVER_USE_MTRR);
}

#define DRM_MTRR_WC     MTRR_TYPE_WRCOMB

static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
                   unsigned int flags)
{
    return mtrr_add(offset, size, flags, 1);
}

static inline int drm_mtrr_del(int handle, unsigned long offset,
                   unsigned long size, unsigned int flags)
{
    return mtrr_del(handle, offset, size);
}

#else
#define drm_core_has_MTRR(dev) (0)

#define DRM_MTRR_WC     0

static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
                   unsigned int flags)
{
    return 0;
}

static inline int drm_mtrr_del(int handle, unsigned long offset,
                   unsigned long size, unsigned int flags)
{
    return 0;
}
#endif

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;
}

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

                /* 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);

                /* Device support (drm_fops.h) */
extern struct mutex drm_global_mutex;
extern int drm_open(struct inode *inode, struct file *filp);
extern int drm_stub_open(struct inode *inode, struct file *filp);
extern int drm_fasync(int fd, struct file *filp, int on);
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 <drm/drm_memory.h>
extern void drm_free_agp(DRM_AGP_MEM * handle, int pages);
extern int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start);
extern DRM_AGP_MEM *drm_agp_bind_pages(struct drm_device *dev,
                       struct page **pages,
                       unsigned long num_pages,
                       uint32_t gtt_offset,
                       uint32_t type);
extern int drm_unbind_agp(DRM_AGP_MEM * handle);

                /* 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_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);

                /* Context IOCTL support (drm_context.h) */
extern int drm_resctx(struct drm_device *dev, void *data,
              struct drm_file *file_priv);
extern int drm_addctx(struct drm_device *dev, void *data,
              struct drm_file *file_priv);
extern int drm_modctx(struct drm_device *dev, void *data,
              struct drm_file *file_priv);
extern int drm_getctx(struct drm_device *dev, void *data,
              struct drm_file *file_priv);
extern int drm_switchctx(struct drm_device *dev, void *data,
             struct drm_file *file_priv);
extern int drm_newctx(struct drm_device *dev, void *data,
              struct drm_file *file_priv);
extern int drm_rmctx(struct drm_device *dev, void *data,
             struct drm_file *file_priv);

extern int drm_ctxbitmap_init(struct drm_device *dev);
extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);

extern int drm_setsareactx(struct drm_device *dev, void *data,
               struct drm_file *file_priv);
extern int drm_getsareactx(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(char *addr, unsigned long length);

                /* Locking IOCTL support (drm_lock.h) */
extern int drm_lock(struct drm_device *dev, void *data,
            struct drm_file *file_priv);
extern int drm_unlock(struct drm_device *dev, void *data,
              struct drm_file *file_priv);
extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
extern void drm_idlelock_take(struct drm_lock_data *lock_data);
extern void drm_idlelock_release(struct drm_lock_data *lock_data);

/*
 * These are exported to drivers so that they can implement fencing using
 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
 */

extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);

                /* Buffer management support (drm_bufs.h) */
extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
              unsigned int size, enum drm_map_type type,
              enum drm_map_flags flags, struct drm_local_map **map_ptr);
extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
                struct drm_file *file_priv);
extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
               struct drm_file *file_priv);
extern int drm_addbufs(struct drm_device *dev, void *data,
               struct drm_file *file_priv);
extern int drm_infobufs(struct drm_device *dev, void *data,
            struct drm_file *file_priv);
extern int drm_markbufs(struct drm_device *dev, void *data,
            struct drm_file *file_priv);
extern int drm_freebufs(struct drm_device *dev, void *data,
            struct drm_file *file_priv);
extern int drm_mapbufs(struct drm_device *dev, void *data,
               struct drm_file *file_priv);
extern int drm_order(unsigned long size);

                /* DMA support (drm_dma.h) */
extern int drm_dma_setup(struct drm_device *dev);
extern void drm_dma_takedown(struct drm_device *dev);
extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
extern void drm_core_reclaim_buffers(struct drm_device *dev,
                     struct drm_file *filp);

                /* IRQ support (drm_irq.h) */
extern int drm_control(struct drm_device *dev, void *data,
               struct drm_file *file_priv);
extern int drm_irq_install(struct drm_device *dev);
extern int drm_irq_uninstall(struct drm_device *dev);

extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
extern int drm_wait_vblank(struct drm_device *dev, void *data,
               struct drm_file *filp);
extern int drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
                     struct timeval *vblanktime);
extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
extern int drm_vblank_get(struct drm_device *dev, int crtc);
extern void drm_vblank_put(struct drm_device *dev, int crtc);
extern void drm_vblank_off(struct drm_device *dev, int crtc);
extern void drm_vblank_cleanup(struct drm_device *dev);
extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
                     struct timeval *tvblank, unsigned flags);
extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
                         int crtc, int *max_error,
                         struct timeval *vblank_time,
                         unsigned flags,
                         struct drm_crtc *refcrtc);
extern void drm_calc_timestamping_constants(struct drm_crtc *crtc);

extern bool
drm_mode_parse_command_line_for_connector(const char *mode_option,
                      struct drm_connector *connector,
                      struct drm_cmdline_mode *mode);

extern struct drm_display_mode *
drm_mode_create_from_cmdline_mode(struct drm_device *dev,
                  struct drm_cmdline_mode *cmd);

/* Modesetting support */
extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
extern int drm_modeset_ctl(struct drm_device *dev, void *data,
               struct drm_file *file_priv);

                /* AGP/GART support (drm_agpsupport.h) */
extern struct drm_agp_head *drm_agp_init(struct drm_device *dev);
extern int drm_agp_acquire(struct drm_device *dev);
extern int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
                 struct drm_file *file_priv);
extern int drm_agp_release(struct drm_device *dev);
extern int drm_agp_release_ioctl(struct drm_device *dev, void *data,
                 struct drm_file *file_priv);
extern int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
extern int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
                struct drm_file *file_priv);
extern int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
extern int drm_agp_info_ioctl(struct drm_device *dev, void *data,
            struct drm_file *file_priv);
extern int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
extern int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
             struct drm_file *file_priv);
extern int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
extern int drm_agp_free_ioctl(struct drm_device *dev, void *data,
            struct drm_file *file_priv);
extern int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
extern int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
              struct drm_file *file_priv);
extern int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
extern int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
            struct drm_file *file_priv);

                /* Stub support (drm_stub.h) */
extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
                   struct drm_file *file_priv);
extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
                struct drm_file *file_priv);
struct drm_master *drm_master_create(struct drm_minor *minor);
extern struct drm_master *drm_master_get(struct drm_master *master);
extern void drm_master_put(struct drm_master **master);

extern void drm_put_dev(struct drm_device *dev);
extern int drm_put_minor(struct drm_minor **minor);
extern void drm_unplug_dev(struct drm_device *dev);
extern unsigned int drm_debug;

extern unsigned int drm_vblank_offdelay;
extern unsigned int drm_timestamp_precision;

extern struct class *drm_class;
extern struct proc_dir_entry *drm_proc_root;
extern struct dentry *drm_debugfs_root;

extern struct idr drm_minors_idr;

extern struct drm_local_map *drm_getsarea(struct drm_device *dev);

                /* Proc support (drm_proc.h) */
extern int drm_proc_init(struct drm_minor *minor, int minor_id,
             struct proc_dir_entry *root);
extern int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root);

                /* Debugfs support */
#if defined(CONFIG_DEBUG_FS)
extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
                struct dentry *root);
extern int drm_debugfs_create_files(struct drm_info_list *files, int count,
                    struct dentry *root, struct drm_minor *minor);
extern int drm_debugfs_remove_files(struct drm_info_list *files, int count,
                                    struct drm_minor *minor);
extern int drm_debugfs_cleanup(struct drm_minor *minor);
#endif

                /* Info file support */
extern int drm_name_info(struct seq_file *m, void *data);
extern int drm_vm_info(struct seq_file *m, void *data);
extern int drm_bufs_info(struct seq_file *m, void *data);
extern int drm_vblank_info(struct seq_file *m, void *data);
extern int drm_clients_info(struct seq_file *m, void* data);
extern int drm_gem_name_info(struct seq_file *m, void *data);


extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
        struct drm_file *file_priv, uint32_t handle, uint32_t flags,
        int *prime_fd);
extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
        struct drm_file *file_priv, int prime_fd, uint32_t *handle);

extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
                    struct drm_file *file_priv);
extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
                    struct drm_file *file_priv);

extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
                        dma_addr_t *addrs, int max_pages);
extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);


void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
int drm_prime_add_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle);
int drm_prime_lookup_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle);
void drm_prime_remove_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);

int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj);
int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf,
             struct drm_gem_object **obj);

#if DRM_DEBUG_CODE
extern int drm_vma_info(struct seq_file *m, void *data);
#endif

                /* Scatter Gather Support (drm_scatter.h) */
extern void drm_sg_cleanup(struct drm_sg_mem * entry);
extern int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
            struct drm_file *file_priv);
extern int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request);
extern int drm_sg_free(struct drm_device *dev, void *data,
               struct drm_file *file_priv);

                   /* ATI PCIGART support (ati_pcigart.h) */
extern int drm_ati_pcigart_init(struct drm_device *dev,
                struct drm_ati_pcigart_info * gart_info);
extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
                   struct drm_ati_pcigart_info * gart_info);

extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
                       size_t align);
extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);

                   /* sysfs support (drm_sysfs.c) */
struct drm_sysfs_class;
extern struct class *drm_sysfs_create(struct module *owner, char *name);
extern void drm_sysfs_destroy(void);
extern int drm_sysfs_device_add(struct drm_minor *minor);
extern void drm_sysfs_hotplug_event(struct drm_device *dev);
extern void drm_sysfs_device_remove(struct drm_minor *minor);
extern char *drm_get_connector_status_name(enum drm_connector_status status);
extern int drm_sysfs_connector_add(struct drm_connector *connector);
extern void drm_sysfs_connector_remove(struct drm_connector *connector);

/* Graphics Execution Manager library functions (drm_gem.c) */
int drm_gem_init(struct drm_device *dev);
void drm_gem_destroy(struct drm_device *dev);
void drm_gem_object_release(struct drm_gem_object *obj);
void drm_gem_object_free(struct kref *kref);
struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
                        size_t size);
int drm_gem_object_init(struct drm_device *dev,
            struct drm_gem_object *obj, size_t size);
int drm_gem_private_object_init(struct drm_device *dev,
            struct drm_gem_object *obj, size_t size);
void drm_gem_object_handle_free(struct drm_gem_object *obj);
void drm_gem_vm_open(struct vm_area_struct *vma);
void drm_gem_vm_close(struct vm_area_struct *vma);
int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);

#include <drm/drm_global.h>

static inline void
drm_gem_object_reference(struct drm_gem_object *obj)
{
    kref_get(&obj->refcount);
}

static inline void
drm_gem_object_unreference(struct drm_gem_object *obj)
{
    if (obj != NULL)
        kref_put(&obj->refcount, drm_gem_object_free);
}

static inline void
drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
{
    if (obj != NULL) {
        struct drm_device *dev = obj->dev;
        mutex_lock(&dev->struct_mutex);
        kref_put(&obj->refcount, drm_gem_object_free);
        mutex_unlock(&dev->struct_mutex);
    }
}

int drm_gem_handle_create(struct drm_file *file_priv,
              struct drm_gem_object *obj,
              u32 *handlep);
int drm_gem_handle_delete(struct drm_file *filp, u32 handle);

static inline void
drm_gem_object_handle_reference(struct drm_gem_object *obj)
{
    drm_gem_object_reference(obj);
    atomic_inc(&obj->handle_count);
}

static inline void
drm_gem_object_handle_unreference(struct drm_gem_object *obj)
{
    if (obj == NULL)
        return;

    if (atomic_read(&obj->handle_count) == 0)
        return;
    /*
     * Must bump handle count first as this may be the last
     * ref, in which case the object would disappear before we
     * checked for a name
     */
    if (atomic_dec_and_test(&obj->handle_count))
        drm_gem_object_handle_free(obj);
    drm_gem_object_unreference(obj);
}

static inline void
drm_gem_object_handle_unreference_unlocked(struct drm_gem_object *obj)
{
    if (obj == NULL)
        return;

    if (atomic_read(&obj->handle_count) == 0)
        return;

    /*
    * Must bump handle count first as this may be the last
    * ref, in which case the object would disappear before we
    * checked for a name
    */

    if (atomic_dec_and_test(&obj->handle_count))
        drm_gem_object_handle_free(obj);
    drm_gem_object_unreference_unlocked(obj);
}

void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
int drm_gem_create_mmap_offset(struct drm_gem_object *obj);

struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
                         struct drm_file *filp,
                         u32 handle);
int drm_gem_close_ioctl(struct drm_device *dev, void *data,
            struct drm_file *file_priv);
int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
            struct drm_file *file_priv);
int drm_gem_open_ioctl(struct drm_device *dev, void *data,
               struct drm_file *file_priv);
void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);

extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);

static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
                             unsigned int token)
{
    struct drm_map_list *_entry;
    list_for_each_entry(_entry, &dev->maplist, head)
        if (_entry->user_token == token)
        return _entry->map;
    return NULL;
}

static __inline__ void drm_core_dropmap(struct drm_local_map *map)
{
}

#include <drm/drm_mem_util.h>

extern int drm_fill_in_dev(struct drm_device *dev,
               const struct pci_device_id *ent,
               struct drm_driver *driver);
int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type);
/* PCI section */
static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
{
    if (dev->driver->device_is_agp != NULL) {
        int err = (*dev->driver->device_is_agp) (dev);

        if (err != 2) {
            return err;
        }
    }

    return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
}

extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
extern int drm_get_pci_dev(struct pci_dev *pdev,
               const struct pci_device_id *ent,
               struct drm_driver *driver);

#define DRM_PCIE_SPEED_25 1
#define DRM_PCIE_SPEED_50 2
#define DRM_PCIE_SPEED_80 4

extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);

/* platform section */
extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
extern void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device);

extern int drm_get_platform_dev(struct platform_device *pdev,
                struct drm_driver *driver);

/* returns true if currently okay to sleep */
static __inline__ bool drm_can_sleep(void)
{
    if (in_atomic() || in_dbg_master() || irqs_disabled())
        return false;
    return true;
}

#endif              /* __KERNEL__ */
#endif