FreeBSD/Linux Kernel Cross Reference
sys/dev/drm2/drmP.h

     /**
      * \file drmP.h
      * Private header for Direct Rendering Manager
      *
      * \author Rickard E. (Rik) Faith <faith@valinux.com>
      * \author Gareth Hughes <gareth@valinux.com>
      */
     
     /*
     * 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #ifndef _DRM_P_H_
    #define _DRM_P_H_
    
    #if defined(_KERNEL) || defined(__KERNEL__)
    
    #include <sys/param.h>
    #include <sys/queue.h>
    #include <sys/malloc.h>
    #include <sys/kernel.h>
    #include <sys/ktr.h>
    #include <sys/module.h>
    #include <sys/systm.h>
    #include <sys/conf.h>
    #include <sys/sglist.h>
    #include <sys/stat.h>
    #include <sys/priv.h>
    #include <sys/proc.h>
    #include <sys/limits.h>
    #include <sys/lock.h>
    #include <sys/fcntl.h>
    #include <sys/uio.h>
    #include <sys/filio.h>
    #include <sys/rwlock.h>
    #include <sys/selinfo.h>
    #include <sys/sysctl.h>
    #include <sys/bus.h>
    #include <sys/queue.h>
    #include <sys/signalvar.h>
    #include <sys/poll.h>
    #include <sys/sbuf.h>
    #include <sys/taskqueue.h>
    #include <sys/tree.h>
    #include <sys/vmmeter.h>
    #include <vm/vm.h>
    #include <vm/pmap.h>
    #include <vm/vm_extern.h>
    #include <vm/vm_kern.h>
    #include <vm/vm_map.h>
    #include <vm/vm_object.h>
    #include <vm/vm_page.h>
    #include <vm/vm_pager.h>
    #include <vm/vm_param.h>
    #include <vm/vm_phys.h>
    #include <machine/bus.h>
    #include <machine/resource.h>
    #if defined(__i386__) || defined(__amd64__)
    #include <machine/specialreg.h>
    #endif
    #include <machine/sysarch.h>
    #include <sys/endian.h>
    #include <sys/mman.h>
    #include <sys/rman.h>
    #include <sys/memrange.h>
    #include <dev/agp/agpvar.h>
    #include <sys/agpio.h>
    #include <sys/mutex.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    #include <sys/selinfo.h>
    #include <sys/bus.h>
    
    #include <dev/drm2/drm.h>
   #include <dev/drm2/drm_sarea.h>
   
   #include <dev/drm2/drm_atomic.h>
   #include <dev/drm2/drm_linux_list.h>
   #include <dev/drm2/drm_gem_names.h>
   
   #include <dev/drm2/drm_os_freebsd.h>
   
   #if defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE))
   #define __OS_HAS_AGP 1
   #else
   #define __OS_HAS_AGP 0
   #endif
   #if defined(CONFIG_MTRR)
   #define __OS_HAS_MTRR 1
   #else
   #define __OS_HAS_MTRR 0
   #endif
   
   struct drm_file;
   struct drm_device;
   
   #include <dev/drm2/drm_hashtab.h>
   #include <dev/drm2/drm_mm.h>
   
   #include "opt_drm.h"
   #include "opt_syscons.h"
   #ifdef DRM_DEBUG
   #undef DRM_DEBUG
   #define DRM_DEBUG_DEFAULT_ON 1
   #endif /* DRM_DEBUG */
   
   #define DRM_DEBUGBITS_DEBUG             0x1
   #define DRM_DEBUGBITS_KMS               0x2
   #define DRM_DEBUGBITS_FAILED_IOCTL      0x4
   
   #undef DRM_LINUX
   #define DRM_LINUX 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_PRIME       0x4000
   
   #define DRIVER_BUS_PCI 0x1
   #define DRIVER_BUS_PLATFORM 0x2
   #define DRIVER_BUS_USB 0x3
   
   /***********************************************************************/
   /** \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, ...) \
           printf("error: [" DRM_NAME ":pid%d:%s] *ERROR* " fmt,           \
               DRM_CURRENTPID, __func__ , ##__VA_ARGS__)
   
   #define DRM_WARNING(fmt, ...)  printf("warning: [" DRM_NAME "] " fmt , ##__VA_ARGS__)
   #define DRM_INFO(fmt, ...)  printf("info: [" DRM_NAME "] " fmt , ##__VA_ARGS__)
   
   /**
    * Debug output.
    *
    * \param fmt printf() like format string.
    * \param arg arguments
    */
   #define DRM_DEBUG(fmt, ...) do {                                        \
           if ((drm_debug & DRM_DEBUGBITS_DEBUG) != 0)                     \
                   printf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID,  \
                           __func__ , ##__VA_ARGS__);                      \
   } while (0)
   
   #define DRM_DEBUG_DRIVER(fmt, ...) do {                                 \
           if ((drm_debug & DRM_DEBUGBITS_KMS) != 0)                       \
                   printf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,\
                           __func__ , ##__VA_ARGS__);                      \
   } while (0)
   
   #define DRM_DEBUG_KMS(fmt, ...) do {                                    \
           if ((drm_debug & DRM_DEBUGBITS_KMS) != 0)                       \
                   printf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,\
                           __func__ , ##__VA_ARGS__);                      \
   } while (0)
   
   #define DRM_LOG(fmt, ...) do {                                          \
           if ((drm_debug & DRM_DEBUGBITS_KMS) != 0)                       \
                   printf("[" DRM_NAME "]:pid%d:%s]" fmt, DRM_CURRENTPID,  \
                           __func__ , ##__VA_ARGS__);                      \
   } while (0)
   
   #define DRM_LOG_KMS(fmt, ...) do {                                      \
           if ((drm_debug & DRM_DEBUGBITS_KMS) != 0)                       \
                   printf("[" DRM_NAME "]:KMS:pid%d:%s]" fmt, DRM_CURRENTPID,\
                           __func__ , ##__VA_ARGS__);                      \
   } while (0)
   
   #define DRM_LOG_MODE(fmt, ...) do {                                     \
           if ((drm_debug & DRM_DEBUGBITS_KMS) != 0)                       \
                   printf("[" DRM_NAME "]:pid%d:%s]" fmt, DRM_CURRENTPID,  \
                           __func__ , ##__VA_ARGS__);                      \
   } while (0)
   
   #define DRM_LOG_DRIVER(fmt, ...) do {                                   \
           if ((drm_debug & DRM_DEBUGBITS_KMS) != 0)                       \
                   printf("[" DRM_NAME "]:KMS:pid%d:%s]" fmt, DRM_CURRENTPID,\
                           __func__ , ##__VA_ARGS__);                      \
   } while (0)
   
   /*@}*/
   
   /***********************************************************************/
   /** \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);
   
   #define DRM_IOCTL_NR(n)                ((n) & 0xff)
   #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 long 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(ioctl, _func, _flags) \
           [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0}
   
   #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;
   };
   
   /**
    * 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 */
   };
   
   struct drm_freelist {
           int initialized;               /**< Freelist in use */
           atomic_t count;                /**< Number of free buffers */
           struct drm_buf *next;          /**< End pointer */
   
   #ifdef FREEBSD_NOTYET
           wait_queue_head_t waiting;     /**< Processes waiting on free bufs */
   #endif /* defined(FREEBSD_NOTYET) */
           int low_mark;                  /**< Low water mark */
           int high_mark;                 /**< High water mark */
   #ifdef FREEBSD_NOTYET
           atomic_t wfh;                  /**< If waiting for high mark */
           spinlock_t lock;
   #endif /* defined(FREEBSD_NOTYET) */
   };
   
   typedef struct drm_dma_handle {
           void *vaddr;
           bus_addr_t busaddr;
           bus_dma_tag_t tag;
           bus_dmamap_t map;
   } 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);
   };
   
   /* initial implementaton using a linked list - todo hashtab */
   struct drm_prime_file_private {
           struct list_head head;
           struct mtx lock;
   };
   
   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;
   
           void *driver_priv;
           struct drm_gem_names object_names;
   
           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;
   
           struct selinfo event_poll;
           struct list_head event_list;
           int event_space;
   
           struct drm_prime_file_private prime;
   };
   
   /**
    * 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 */
           struct mtx 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 */
           device_t 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;
   };
   
   /**
    * Scatter-gather memory.
    */
   struct drm_sg_mem {
           vm_offset_t vaddr;
           vm_paddr_t *busaddr;
           vm_pindex_t pages;
   };
   
   struct drm_sigdata {
           int context;
           struct drm_hw_lock *lock;
   };
   
   /**
    * Kernel side of a mapping
    */
   #define DRM_MAP_HANDLE_BITS     (sizeof(void *) == 4 ? 4 : 24)
   #define DRM_MAP_HANDLE_SHIFT    (sizeof(void *) * 8 - DRM_MAP_HANDLE_BITS)
   
   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 */
   
                                     /* Private data                         */
           drm_dma_handle_t *dmah;
   };
   
   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;
           struct drm_dma_handle *dmah; /* handle for ATI PCIGART table FIXME */
   };
   
   /**
    * GEM specific mm private for tracking GEM objects
    */
   struct drm_gem_mm {
           struct unrhdr *idxunr;
           struct drm_open_hash offset_hash; /**< User token hash table for maps */
   };
   
   /**
    * 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 */
           u_int 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: filp in Linux parlance */
           vm_object_t vm_obj;
   
           /* Mapping info for this object */
           bool on_map;
           struct drm_hash_item 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;
   
   #ifdef FREEBSD_NOTYET
           /* 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;
   #endif /* FREEBSD_NOTYET */
   };
   
   #include <dev/drm2/drm_crtc.h>
   
   /* per-master structure */
   struct drm_master {
   
           u_int 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);
           void (*free_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. 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 \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 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) (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);
           /**
            * 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);
   
           /**
            * 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);
           int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
           void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
   
   #ifdef FREEBSD_NOTYET
           /* 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);
   #endif /* defined(FREEBSD_NOTYET) */
   
           /* 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 */
           struct cdev_pager_ops *gem_pager_ops;
   
           int     (*sysctl_init)(struct drm_device *dev,
                       struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
           void    (*sysctl_cleanup)(struct drm_device *dev);
   
           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 drm_bus *bus;
   #ifdef COMPAT_FREEBSD32
           struct drm_ioctl_desc *compat_ioctls;
           int *num_compat_ioctls;
   #endif
   
           int     buf_priv_size;
   };
   
   #define DRM_MINOR_UNASSIGNED 0
   #define DRM_MINOR_LEGACY 1
   #define DRM_MINOR_CONTROL 2
   #define DRM_MINOR_RENDER 3
   
   /**
    * DRM minor structure. This structure represents a drm minor number.
    */
   struct drm_minor {
           int index;                      /**< Minor device number */
           int type;                       /**< Control or render */
           struct cdev *device;            /**< Device number for mknod */
           device_t kdev;                  /**< OS device */
           struct drm_device *dev;
   
           struct drm_master *master; /* currently active master for this node */
           struct list_head master_list;
           struct drm_mode_group mode_group;
   
           struct sigio *buf_sigio;        /* Processes waiting for SIGIO     */
   };
   
   /* 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;
   };
   
   /**
    * DRM device structure. This structure represent a complete card that
    * may contain multiple heads.
    */
   struct drm_device {
           int if_version;                 /**< Highest interface version set */
   
           /** \name Locks */
           /*@{ */
           struct mtx count_lock;          /**< For inuse, drm_device::open_count, drm_device::buf_use */
           struct sx dev_struct_lock;      /**< 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 mtx ctxlist_mutex;       /**< For ctxlist */
          drm_local_map_t **context_sareas;
          int max_context;
          unsigned long *ctx_bitmap;
  
          /*@} */
  
          /** \name DMA support */
          /*@{ */
          struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
          /*@} */
  
          /** \name Context support */
          /*@{ */
          int irq_enabled;                /**< True if irq handler is enabled */
          atomic_t context_flag;          /**< Context swapping flag */
          atomic_t interrupt_flag;        /**< Interruption handler flag */
          atomic_t 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 */
          /*@} */
  
          /** \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;
  
          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) */
          struct mtx vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
          struct mtx 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 callout vblank_disable_callout;
  
          u32 max_vblank_count;           /**< size of vblank counter register */
  
          /**
           * List of events
           */
          struct list_head vblank_event_list;
          struct mtx event_lock;
  
          /*@} */
  
          struct drm_agp_head *agp;       /**< AGP data */
  
          device_t dev;                   /* Device instance from newbus */
          uint16_t pci_device;            /* PCI device id */
          uint16_t pci_vendor;            /* PCI vendor id */
          uint16_t pci_subdevice;         /* PCI subsystem device id */
          uint16_t pci_subvendor;         /* PCI subsystem vendor id */
  
          struct drm_sg_mem *sg;  /**< Scatter gather memory */
          unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
          void *dev_private;              /**< device private data */
          void *mm_private;
          struct drm_sigdata sigdata;        /**< For block_all_signals */
          sigset_t sigmask;
  
          struct drm_driver *driver;
          struct drm_local_map *agp_buffer_map;
          unsigned int agp_buffer_token;
          struct drm_minor *control;              /**< Control node for card */
          struct drm_minor *primary;              /**< render type primary screen head */
  
          struct drm_mode_config mode_config;     /**< Current mode config */
  
          /** \name GEM information */
          /*@{ */
          struct sx object_name_lock;
          struct drm_gem_names object_names;
          /*@} */
          int switch_power_state;
  
          atomic_t unplugged; /* device has been unplugged or gone away */
  
                                  /* Locks */
          struct mtx        dma_lock;     /* protects dev->dma */
          struct mtx        irq_lock;     /* protects irq condition checks */
  
                                  /* Context support */
          int               irq;          /* Interrupt used by board         */
          int               msi_enabled;  /* MSI enabled */
          int               irqrid;       /* Interrupt used by board */
          struct resource   *irqr;        /* Resource for interrupt used by board    */
          void              *irqh;        /* Handle from bus_setup_intr      */
  
          /* Storage of resource pointers for drm_get_resource_* */
  #define DRM_MAX_PCI_RESOURCE    6
          struct resource   *pcir[DRM_MAX_PCI_RESOURCE];
          int               pcirid[DRM_MAX_PCI_RESOURCE];
          struct mtx        pcir_lock;
  
          int               pci_domain;
          int               pci_bus;
          int               pci_slot;
          int               pci_func;
  
                                  /* Sysctl support */
          struct drm_sysctl_info *sysctl;
          int               sysctl_node_idx;
  
          void              *drm_ttm_bdev;
  
          void *sysctl_private;
          char busid_str[128];
          int modesetting;
  
          const drm_pci_id_list_t *id_entry;      /* PCI ID, name, and chipset private */
  };
  
  #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             MDF_WRITECOMBINE
  
  int drm_mtrr_add(unsigned long offset, unsigned long size, unsigned int flags);
  int drm_mtrr_del(int handle, unsigned long offset, unsigned long size, unsigned int flags);
  
  #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
  
  /******************************************************************/
  /** \name Internal function definitions */
  /*@{*/
  
                                  /* Driver support (drm_drv.h) */
  d_ioctl_t drm_ioctl;
  extern int drm_lastclose(struct drm_device *dev);
  
                                  /* Device support (drm_fops.h) */
  extern struct sx drm_global_mutex;
  d_open_t drm_open;
  d_read_t drm_read;
  extern void drm_release(void *data);
  
                                  /* Mapping support (drm_vm.h) */
  d_mmap_t drm_mmap;
  int     drm_mmap_single(struct cdev *kdev, vm_ooffset_t *offset,
              vm_size_t size, struct vm_object **obj_res, int nprot);
  d_poll_t drm_poll;
  
  
                                  /* 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(vm_page_t *pages, unsigned long num_pages);
  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 void drm_send_vblank_event(struct drm_device *dev, int crtc,
                                       struct drm_pending_vblank_event *e);
  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);
  
  
                                  /* 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_notyet;
  
  extern unsigned int drm_vblank_offdelay;
  extern unsigned int drm_timestamp_precision;
  extern unsigned int drm_timestamp_monotonic;
  
  extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
  
  
  #ifdef FREEBSD_NOTYET
  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, vm_page_t *pages,
                                              dma_addr_t *addrs, int max_pages);
  extern struct sg_table *drm_prime_pages_to_sg(vm_page_t *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);
  #endif /* FREEBSD_NOTYET */
  
                                  /* 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, dma_addr_t maxaddr);
  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);
  
  /* 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 drm_gem_object *obj);
  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);
  int drm_gem_mmap_single(struct drm_device *dev, vm_ooffset_t *offset,
      vm_size_t size, struct vm_object **obj_res, int nprot);
  void drm_gem_pager_dtr(void *obj);
  
  #include <dev/drm2/drm_global.h>
  
  static inline void
  drm_gem_object_reference(struct drm_gem_object *obj)
  {
  
          KASSERT(obj->refcount > 0, ("Dangling obj %p", obj));
          refcount_acquire(&obj->refcount);
  }
  
  static inline void
  drm_gem_object_unreference(struct drm_gem_object *obj)
  {
  
          if (obj == NULL)
                  return;
          if (refcount_release(&obj->refcount))
                  drm_gem_object_free(obj);
  }
  
  static inline void
  drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
  {
          if (obj != NULL) {
                  struct drm_device *dev = obj->dev;
                  DRM_LOCK(dev);
                  drm_gem_object_unreference(obj);
                  DRM_UNLOCK(dev);
          }
  }
  
  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 <dev/drm2/drm_mem_util.h>
  
  extern int drm_fill_in_dev(struct drm_device *dev,
                             struct drm_driver *driver);
  extern void drm_cancel_fill_in_dev(struct drm_device *dev);
  int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type);
  /*@}*/
  
  /* PCI section */
  int drm_pci_device_is_agp(struct drm_device *dev);
  int drm_pci_device_is_pcie(struct drm_device *dev);
  
  extern int drm_get_pci_dev(device_t kdev, struct drm_device *dev,
                             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);
  
  #define drm_can_sleep() (DRM_HZ & 1)
  
  /* Platform section */
  int drm_get_platform_dev(device_t kdev, struct drm_device *dev,
                           struct drm_driver *driver);
  
  /* FreeBSD specific -- should be moved to drm_os_freebsd.h */
  
  #define DRM_GEM_MAPPING_MASK    (3ULL << 62)
  #define DRM_GEM_MAPPING_KEY     (2ULL << 62) /* Non-canonical address form */
  #define DRM_GEM_MAX_IDX         0x3fffff
  #define DRM_GEM_MAPPING_IDX(o)  (((o) >> 40) & DRM_GEM_MAX_IDX)
  #define DRM_GEM_MAPPING_OFF(i)  (((uint64_t)(i)) << 40)
  #define DRM_GEM_MAPPING_MAPOFF(o) \
      ((o) & ~(DRM_GEM_MAPPING_OFF(DRM_GEM_MAX_IDX) | DRM_GEM_MAPPING_KEY))
  
  SYSCTL_DECL(_hw_drm);
  
  #define DRM_DEV_MODE    (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
  #define DRM_DEV_UID     UID_ROOT
  #define DRM_DEV_GID     GID_VIDEO
  
  #define DRM_WAKEUP(w)           wakeup((void *)w)
  #define DRM_WAKEUP_INT(w)       wakeup(w)
  #define DRM_INIT_WAITQUEUE(queue) do {(void)(queue);} while (0)
  
  #define DRM_CURPROC             curthread
  #define DRM_STRUCTPROC          struct thread
  #define DRM_SPINTYPE            struct mtx
  #define DRM_SPININIT(l,name)    mtx_init(l, name, NULL, MTX_DEF)
  #define DRM_SPINUNINIT(l)       mtx_destroy(l)
  #define DRM_SPINLOCK(l)         mtx_lock(l)
  #define DRM_SPINUNLOCK(u)       mtx_unlock(u)
  #define DRM_SPINLOCK_IRQSAVE(l, irqflags) do {          \
          mtx_lock(l);                                    \
          (void)irqflags;                                 \
  } while (0)
  #define DRM_SPINUNLOCK_IRQRESTORE(u, irqflags) mtx_unlock(u)
  #define DRM_SPINLOCK_ASSERT(l)  mtx_assert(l, MA_OWNED)
  #define DRM_LOCK_SLEEP(dev, chan, flags, msg, timeout)                  \
      (sx_sleep((chan), &(dev)->dev_struct_lock, (flags), (msg), (timeout)))
  #if defined(INVARIANTS)
  #define DRM_LOCK_ASSERT(dev)    sx_assert(&(dev)->dev_struct_lock, SA_XLOCKED)
  #define DRM_UNLOCK_ASSERT(dev)  sx_assert(&(dev)->dev_struct_lock, SA_UNLOCKED)
  #else
  #define DRM_LOCK_ASSERT(d)
  #define DRM_UNLOCK_ASSERT(d)
  #endif
  
  #define DRM_SYSCTL_HANDLER_ARGS (SYSCTL_HANDLER_ARGS)
  
  enum {
          DRM_IS_NOT_AGP,
          DRM_IS_AGP,
          DRM_MIGHT_BE_AGP
  };
  
  #define DRM_VERIFYAREA_READ( uaddr, size )              \
          (!useracc(__DECONST(caddr_t, uaddr), size, VM_PROT_READ))
  
  #define DRM_COPY_TO_USER(user, kern, size) \
          copyout(kern, user, size)
  #define DRM_COPY_FROM_USER(kern, user, size) \
          copyin(user, kern, size)
  #define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3)  \
          copyin(arg2, arg1, arg3)
  #define DRM_COPY_TO_USER_UNCHECKED(arg1, arg2, arg3)    \
          copyout(arg2, arg1, arg3)
  #define DRM_GET_USER_UNCHECKED(val, uaddr)              \
          ((val) = fuword32(uaddr), 0)
  
  #define DRM_GET_PRIV_SAREA(_dev, _ctx, _map) do {       \
          (_map) = (_dev)->context_sareas[_ctx];          \
  } while(0)
  
  /* Returns -errno to shared code */
  #define DRM_WAIT_ON( ret, queue, timeout, condition )           \
  for ( ret = 0 ; !ret && !(condition) ; ) {                      \
          DRM_UNLOCK(dev);                                        \
          mtx_lock(&dev->irq_lock);                               \
          if (!(condition))                                       \
              ret = -mtx_sleep(&(queue), &dev->irq_lock,          \
                  PCATCH, "drmwtq", (timeout));                   \
              if (ret == -ERESTART)                               \
                  ret = -ERESTARTSYS;                             \
          mtx_unlock(&dev->irq_lock);                             \
          DRM_LOCK(dev);                                          \
  }
  
  #define dev_err(dev, fmt, ...)                                          \
          device_printf((dev), "error: " fmt, ## __VA_ARGS__)
  #define dev_warn(dev, fmt, ...)                                         \
          device_printf((dev), "warning: " fmt, ## __VA_ARGS__)
  #define dev_info(dev, fmt, ...)                                         \
          device_printf((dev), "info: " fmt, ## __VA_ARGS__)
  #define dev_dbg(dev, fmt, ...) do {                                     \
          if ((drm_debug& DRM_DEBUGBITS_KMS) != 0) {                      \
                  device_printf((dev), "debug: " fmt, ## __VA_ARGS__);    \
          }                                                               \
  } while (0)
  
  struct drm_msi_blacklist_entry
  {
          int vendor;
          int device;
  };
  
  struct drm_vblank_info {
          wait_queue_head_t queue;        /* vblank wait queue */
          atomic_t count;                 /* number of VBLANK interrupts */
                                          /* (driver must alloc the right number of counters) */
          atomic_t refcount;              /* number of users of vblank interrupts */
          u32 last;                       /* protected by dev->vbl_lock, used */
                                          /* for wraparound handling */
          int enabled;                    /* so we don't call enable more than */
                                          /* once per disable */
          int inmodeset;                  /* Display driver is setting mode */
  };
  
  #ifndef DMA_BIT_MASK
  #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : (1ULL<<(n)) - 1)
  #endif
  
  #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
  
  enum dmi_field {
          DMI_NONE,
          DMI_BIOS_VENDOR,
          DMI_BIOS_VERSION,
          DMI_BIOS_DATE,
          DMI_SYS_VENDOR,
          DMI_PRODUCT_NAME,
          DMI_PRODUCT_VERSION,
          DMI_PRODUCT_SERIAL,
          DMI_PRODUCT_UUID,
          DMI_BOARD_VENDOR,
          DMI_BOARD_NAME,
          DMI_BOARD_VERSION,
          DMI_BOARD_SERIAL,
          DMI_BOARD_ASSET_TAG,
          DMI_CHASSIS_VENDOR,
          DMI_CHASSIS_TYPE,
          DMI_CHASSIS_VERSION,
          DMI_CHASSIS_SERIAL,
          DMI_CHASSIS_ASSET_TAG,
          DMI_STRING_MAX,
  };
  
  struct dmi_strmatch {
          unsigned char slot;
          char substr[79];
  };
  
  struct dmi_system_id {
          int (*callback)(const struct dmi_system_id *);
          const char *ident;
          struct dmi_strmatch matches[4];
  };
  #define DMI_MATCH(a, b) {(a), (b)}
  bool dmi_check_system(const struct dmi_system_id *);
  
  /* Device setup support (drm_drv.c) */
  int     drm_probe_helper(device_t kdev, const drm_pci_id_list_t *idlist);
  int     drm_attach_helper(device_t kdev, const drm_pci_id_list_t *idlist,
              struct drm_driver *driver);
  int     drm_generic_suspend(device_t kdev);
  int     drm_generic_resume(device_t kdev);
  int     drm_generic_detach(device_t kdev);
  
  void drm_event_wakeup(struct drm_pending_event *e);
  
  int drm_add_busid_modesetting(struct drm_device *dev,
      struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
  
  /* Buffer management support (drm_bufs.c) */
  unsigned long drm_get_resource_start(struct drm_device *dev,
                                       unsigned int resource);
  unsigned long drm_get_resource_len(struct drm_device *dev,
                                     unsigned int resource);
  
  /* IRQ support (drm_irq.c) */
  irqreturn_t drm_irq_handler(DRM_IRQ_ARGS);
  void    drm_driver_irq_preinstall(struct drm_device *dev);
  void    drm_driver_irq_postinstall(struct drm_device *dev);
  void    drm_driver_irq_uninstall(struct drm_device *dev);
  
  /* sysctl support (drm_sysctl.h) */
  extern int              drm_sysctl_init(struct drm_device *dev);
  extern int              drm_sysctl_cleanup(struct drm_device *dev);
  
  int     drm_version(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
  
  /* consistent PCI memory functions (drm_pci.c) */
  int     drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
  int     drm_pci_set_unique(struct drm_device *dev, struct drm_master *master,
              struct drm_unique *u);
  int     drm_pci_agp_init(struct drm_device *dev);
  int     drm_pci_enable_msi(struct drm_device *dev);
  void    drm_pci_disable_msi(struct drm_device *dev);
  
  struct ttm_bo_device;
  int ttm_bo_mmap_single(struct ttm_bo_device *bdev, vm_ooffset_t *offset,
      vm_size_t size, struct vm_object **obj_res, int nprot);
  struct ttm_buffer_object;
  void ttm_bo_release_mmap(struct ttm_buffer_object *bo);
  
  #if  __OS_HAS_AGP
                                  /* Memory management support (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);
  #ifdef FREEBSD_NOTYET
  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);
  #endif /* FREEBSD_NOTYET */
  extern int drm_unbind_agp(DRM_AGP_MEM * handle);
  
                                  /* 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);
  
  #else
  
  static inline void drm_free_agp(DRM_AGP_MEM * handle, int pages)
  {
  }
  
  static inline int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start)
  {
          return -ENODEV;
  }
  
  static inline int drm_unbind_agp(DRM_AGP_MEM * handle)
  {
          return -ENODEV;
  }
  #ifdef FREEBSD_NOTYET
  static inline struct agp_memory *drm_agp_bind_pages(struct drm_device *dev,
                                                struct page **pages,
                                                unsigned long num_pages,
                                                uint32_t gtt_offset,
                                                uint32_t type)
  {
          return NULL;
  }
  #endif
  static inline struct drm_agp_head *drm_agp_init(struct drm_device *dev)
  {
          return NULL;
  }
  
  static inline void drm_agp_clear(struct drm_device *dev)
  {
  }
  
  static inline int drm_agp_acquire(struct drm_device *dev)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
                                          struct drm_file *file_priv)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_release(struct drm_device *dev)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_release_ioctl(struct drm_device *dev, void *data,
                                          struct drm_file *file_priv)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_enable(struct drm_device *dev,
                                   struct drm_agp_mode mode)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
                                         struct drm_file *file_priv)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_info(struct drm_device *dev,
                                 struct drm_agp_info *info)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_info_ioctl(struct drm_device *dev, void *data,
                                       struct drm_file *file_priv)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_alloc(struct drm_device *dev,
                                  struct drm_agp_buffer *request)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
                                        struct drm_file *file_priv)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_free(struct drm_device *dev,
                                 struct drm_agp_buffer *request)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_free_ioctl(struct drm_device *dev, void *data,
                                       struct drm_file *file_priv)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_unbind(struct drm_device *dev,
                                   struct drm_agp_binding *request)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
                                         struct drm_file *file_priv)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_bind(struct drm_device *dev,
                                 struct drm_agp_binding *request)
  {
          return -ENODEV;
  }
  
  static inline int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
                                       struct drm_file *file_priv)
  {
          return -ENODEV;
  }
  
  #endif /* __OS_HAS_AGP */
  
  #endif                          /* __KERNEL__ */
  #endif

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