drm: Update drm_irq.c...

[dragonfly.git] / sys / dev / drm / include / drm / 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.
 */

#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/device.h>
#include <sys/sglist.h>
#include <sys/stat.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/spinlock.h>
#include <sys/spinlock2.h>
#include <sys/fcntl.h>
#include <sys/uio.h>
#include <sys/filio.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 <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_page2.h>
#include <vm/vm_pager.h>
#include <vm/vm_param.h>
#include <machine/param.h>
#include <machine/pmap.h>
#ifdef __x86_64__
#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>

MALLOC_DECLARE(M_DRM);

#include <uapi_drm/drm.h>
#include <uapi_drm/drm_sarea.h>

#include <linux/atomic.h>
#include <linux/bug.h>
#include <linux/capability.h>
#include <linux/err.h>
#include <linux/idr.h>
#include <linux/pci.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/mm.h>
#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/scatterlist.h>
#include <linux/timer.h>
#include <asm/io.h>
#include <linux/seq_file.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <linux/workqueue.h>

#include <asm/uaccess.h>

#include <drm/drm_vma_manager.h>

struct drm_file;
struct drm_device;

struct device_node;
struct videomode;

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

/*
 * 4 debug categories are defined:
 *
 * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
 *       This is the category used by the DRM_DEBUG() macro.
 *
 * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
 *         This is the category used by the DRM_DEBUG_DRIVER() macro.
 *
 * KMS: used in the modesetting code.
 *      This is the category used by the DRM_DEBUG_KMS() macro.
 *
 * PRIME: used in the prime code.
 *        This is the category used by the DRM_DEBUG_PRIME() macro.
 *
 * Enabling verbose debug messages is done through the drm.debug parameter,
 * each category being enabled by a bit.
 *
 * drm.debug=0x1 will enable CORE messages
 * drm.debug=0x2 will enable DRIVER messages
 * drm.debug=0x3 will enable CORE and DRIVER messages
 * ...
 * drm.debug=0xf will enable all messages
 *
 * An interesting feature is that it's possible to enable verbose logging at
 * run-time by echoing the debug value in its sysfs node:
 *   # echo 0xf > /sys/module/drm/parameters/debug
 */
#define DRM_UT_CORE             0x01
#define DRM_UT_DRIVER           0x02
#define DRM_UT_KMS              0x04
#define DRM_UT_PRIME            0x08

void drm_ut_debug_printk(const char *function_name,
                         const char *format, ...);

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

/***********************************************************************/
/** \name DRM template customization defaults */
/*@{*/

/* driver capabilities and requirements mask */
#define DRIVER_USE_AGP     0x1
#define DRIVER_REQUIRE_AGP 0x2
#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_DMA_QUEUE   0x200
#define DRIVER_GEM         0x1000
#define DRIVER_MODESET     0x2000
#define DRIVER_PRIME       0x4000
#define DRIVER_RENDER      0x8000

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

#define DRM_DEBUG_CODE 2          /**< Include debugging code if > 1, then
                                     also include looping detection. */

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

#define DRM_MAP_HASH_OFFSET 0x10000000

/*@}*/

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

/**
 * Error output.
 *
 * \param fmt printf() like format string.
 * \param arg arguments
 */
#define DRM_ERROR(fmt, ...) \
        kprintf("error: [" DRM_NAME ":pid%d:%s] *ERROR* " fmt,          \
            DRM_CURRENTPID, __func__ , ##__VA_ARGS__)

#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_MAX(a,b) ((a)>(b)?(a):(b))

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

#define __OS_HAS_AGP    1

#define DRM_DEV_MODE    (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
#define DRM_DEV_UID     0
#define DRM_DEV_GID     0

#define DRM_CURPROC             curthread
#define DRM_STRUCTPROC          struct thread
#define DRM_CURRENTPID          (curproc != NULL ? curproc->p_pid : -1)
#define DRM_LOCK(dev)           lockmgr(&(dev)->struct_mutex, LK_EXCLUSIVE)
#define DRM_UNLOCK(dev)         lockmgr(&(dev)->struct_mutex, LK_RELEASE)
#define DRM_LOCK_SLEEP(dev, chan, flags, msg, timeout)                  \
    (lksleep((chan), &(dev)->struct_mutex, (flags), (msg), (timeout)))
#if defined(INVARIANTS)
#define DRM_LOCK_ASSERT(dev)    KKASSERT(lockstatus(&(dev)->struct_mutex, curthread) != 0);
#define DRM_UNLOCK_ASSERT(dev)  KKASSERT(lockstatus(&(dev)->struct_mutex, curthread) == 0);
#else
#define DRM_LOCK_ASSERT(d)
#define DRM_UNLOCK_ASSERT(d)
#endif

#define DRM_SYSCTL_HANDLER_ARGS (SYSCTL_HANDLER_ARGS)

typedef void                    irqreturn_t;
#define IRQ_HANDLED             /* nothing */
#define IRQ_NONE                /* nothing */

enum {
        DRM_IS_NOT_AGP,
        DRM_IS_AGP,
        DRM_MIGHT_BE_AGP
};
#define DRM_AGP_MEM             struct agp_memory_info

#define drm_get_device_from_kdev(_kdev) (_kdev->si_drv1)

#define DRM_AGP_FIND_DEVICE()   agp_find_device()
#define DRM_MTRR_WC             MDF_WRITECOMBINE

#define LOCK_TEST_WITH_RETURN(dev, file_priv)                           \
do {                                                                    \
        if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) ||              \
             dev->lock.file_priv != file_priv) {                        \
                DRM_ERROR("%s called without lock held\n",              \
                           __FUNCTION__);                               \
                return EINVAL;                                          \
        }                                                               \
} while (0)

/* Returns -errno to shared code */
#define DRM_WAIT_ON( ret, queue, timeout, condition )           \
for ( ret = 0 ; !ret && !(condition) ; ) {                      \
        DRM_UNLOCK(dev);                                        \
        lwkt_serialize_enter(&dev->irq_lock);                   \
        if (!(condition)) {                                     \
            tsleep_interlock(&(queue), PCATCH);                 \
            lwkt_serialize_exit(&dev->irq_lock);                \
            ret = -tsleep(&(queue), PCATCH | PINTERLOCKED,      \
                          "drmwtq", (timeout));                 \
        } else {                                                \
                lwkt_serialize_exit(&dev->irq_lock);            \
        }                                                       \
        DRM_LOCK(dev);                                          \
}

int vm_phys_fictitious_reg_range(vm_paddr_t start, vm_paddr_t end,
    vm_memattr_t memattr);
void vm_phys_fictitious_unreg_range(vm_paddr_t start, vm_paddr_t end);
vm_page_t vm_phys_fictitious_to_vm_page(vm_paddr_t pa);

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


#define DRM_INFO(fmt, ...)  kprintf("info: [" DRM_NAME "] " fmt , ##__VA_ARGS__)

#define DRM_INFO_ONCE(fmt, ...)                         \
        printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)

#define DRM_DEBUGBITS_DEBUG             0x1
#define DRM_DEBUGBITS_KMS               0x2
#define DRM_DEBUGBITS_FAILED_IOCTL      0x4
#define DRM_DEBUGBITS_VERBOSE           0x8

#define DRM_DEBUG(fmt, ...) do {                                        \
        if ((drm_debug & DRM_DEBUGBITS_DEBUG) != 0)             \
                kprintf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID, \
                        __func__ , ##__VA_ARGS__);                      \
} while (0)

#define DRM_DEBUG_VERBOSE(fmt, ...) do {                                \
        if ((drm_debug & DRM_DEBUGBITS_VERBOSE) != 0)           \
                kprintf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID, \
                        __func__ , ##__VA_ARGS__);                      \
} while (0)

#define DRM_DEBUG_KMS(fmt, ...) do {                                    \
        if ((drm_debug & DRM_DEBUGBITS_KMS) != 0)                       \
                kprintf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,\
                        __func__ , ##__VA_ARGS__);                      \
} while (0)

#define DRM_DEBUG_DRIVER(fmt, ...) do {                                 \
        if ((drm_debug & DRM_DEBUGBITS_KMS) != 0)                       \
                kprintf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,\
                        __func__ , ##__VA_ARGS__);                      \
} while (0)

#define DRM_LOG_KMS(fmt, ...) do {                                      \
        kprintf("[" DRM_NAME ":KMS:pid%d:%s] " fmt, DRM_CURRENTPID,     \
                        __func__ , ##__VA_ARGS__);                      \
} while (0)

#define dev_dbg(dev, fmt, ...) do {                                     \
        if ((drm_debug& DRM_DEBUGBITS_KMS) != 0) {                      \
                device_printf((dev), "debug: " fmt, ## __VA_ARGS__);    \
        }                                                               \
} while (0)

typedef struct drm_pci_id_list
{
        int vendor;
        int device;
        long driver_private;
        char *name;
} drm_pci_id_list_t;

struct drm_msi_blacklist_entry
{
        int vendor;
        int device;
};

/**
 * Ioctl function type.
 *
 * \param inode device inode.
 * \param file_priv DRM file private pointer.
 * \param cmd command.
 * \param arg argument.
 */
typedef int drm_ioctl_t(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);

typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
                               unsigned long arg);

#define DRM_IOCTL_NR(n)                ((n) & 0xff)

#define DRM_AUTH        0x1
#define DRM_MASTER      0x2
#define DRM_ROOT_ONLY   0x4
#define DRM_CONTROL_ALLOW 0x8
#define DRM_UNLOCKED    0x10
#define DRM_RENDER_ALLOW 0x20

struct drm_ioctl_desc {
        unsigned int cmd;
        int flags;
        drm_ioctl_t *func;
        unsigned int cmd_drv;
        const char *name;
};

/**
 * Creates a driver or general drm_ioctl_desc array entry for the given
 * ioctl, for use by drm_ioctl().
 */
#define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags)                 \
        [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl}

typedef struct drm_magic_entry {
        struct list_head head;
        struct drm_hash_item hash_item;
        struct drm_file        *priv;
        struct drm_magic_entry *next;
} drm_magic_entry_t;

typedef struct drm_magic_head {
        struct drm_magic_entry *head;
        struct drm_magic_entry *tail;
} drm_magic_head_t;

typedef 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 */
} drm_buf_t;

/** bufs is one longer than it has to be */
struct drm_waitlist {
        int count;                      /**< Number of possible buffers */
        struct drm_buf **bufs;          /**< List of pointers to buffers */
        struct drm_buf **rp;                    /**< Read pointer */
        struct drm_buf **wp;                    /**< Write pointer */
        struct drm_buf **end;           /**< End pointer */
        spinlock_t read_lock;
        spinlock_t write_lock;
};

typedef struct drm_dma_handle {
        void *vaddr;
        size_t size;
        bus_addr_t busaddr;
        bus_dma_tag_t tag;
        bus_dmamap_t map;
} drm_dma_handle_t;

typedef struct drm_buf_entry {
        int               buf_size;
        int               buf_count;
        drm_buf_t         *buflist;
        int               seg_count;
        int               page_order;
        struct drm_dma_handle **seglist;

        int low_mark;                   /**< Low water mark */
        int high_mark;                  /**< High water mark */
} drm_buf_entry_t;

/* 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;
#ifdef DUMBBELL_WIP
        struct mutex lock;
#endif /* DUMBBELL_WIP */
};

/** File private data */
struct drm_file {
        int authenticated;
        struct drm_device *dev;
        int               master;

        /* true when the client has asked us to expose stereo 3D mode flags */
        bool stereo_allowed;
        /*
         * true if client understands CRTC primary planes and cursor planes
         * in the plane list
         */
        unsigned universal_planes:1;

        pid_t             pid;
        uid_t             uid;
        drm_magic_t       magic;
        unsigned long     ioctl_count;
        struct list_head lhead;
        struct kqinfo     dkq;

        /** Mapping of mm object handles to object pointers. */
        struct idr object_idr;
        /** Lock for synchronization of access to object_idr. */
        struct lock table_lock;

        void             *driver_priv;

        int               is_master;
        struct drm_master *masterp;

        /**
         * fbs - List of framebuffers associated with this file.
         *
         * Protected by fbs_lock. Note that the fbs list holds a reference on
         * the fb object to prevent it from untimely disappearing.
         */
        struct list_head fbs;
        struct lock fbs_lock;

        wait_queue_head_t event_wait;
        struct list_head  event_list;
        int               event_space;

        struct drm_prime_file_private prime;
};

/** Wait queue */
struct drm_queue {
        atomic_t use_count;             /**< Outstanding uses (+1) */
        atomic_t finalization;          /**< Finalization in progress */
        atomic_t block_count;           /**< Count of processes waiting */
        atomic_t block_read;            /**< Queue blocked for reads */
        wait_queue_head_t read_queue;   /**< Processes waiting on block_read */
        atomic_t block_write;           /**< Queue blocked for writes */
        wait_queue_head_t write_queue;  /**< Processes waiting on block_write */
        atomic_t total_queued;          /**< Total queued statistic */
        atomic_t total_flushed;         /**< Total flushes statistic */
        atomic_t total_locks;           /**< Total locks statistics */
        enum drm_ctx_flags flags;       /**< Context preserving and 2D-only */
        struct drm_waitlist waitlist;   /**< Pending buffers */
        wait_queue_head_t flush_queue;  /**< Processes waiting until flush */
};

/**
 * Lock data.
 */
struct drm_lock_data {
        struct drm_hw_lock *hw_lock;    /**< Hardware lock */
        /** Private of lock holder's file (NULL=kernel) */
        struct drm_file *file_priv;
        wait_queue_head_t lock_queue;   /**< Queue of blocked processes */
        unsigned long lock_time;        /**< Time of last lock in jiffies */
};

/* This structure, in the struct drm_device, is always initialized while the
 * device
 * is open.  dev->dma_lock protects the incrementing of dev->buf_use, which
 * when set marks that no further bufs may be allocated until device teardown
 * occurs (when the last open of the device has closed).  The high/low
 * watermarks of bufs are only touched by the X Server, and thus not
 * concurrently accessed, so no locking is needed.
 */
typedef 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;

} drm_device_dma_t;

typedef struct drm_agp_mem {
        void               *handle;
        unsigned long      bound; /* address */
        int                pages;
        struct drm_agp_mem *prev;
        struct drm_agp_mem *next;
} drm_agp_mem_t;

typedef struct drm_agp_head {
        device_t           agpdev;
        struct agp_info    agp_info;
        const char         *chipset;
        drm_agp_mem_t      *memory;
        unsigned long      mode;
        int                enabled;
        int                acquired;
        unsigned long      base;
        int                agp_mtrr;
        int                cant_use_aperture;
        unsigned long      page_mask;
} drm_agp_head_t;

typedef struct drm_sg_mem {
        vm_offset_t vaddr;
        vm_paddr_t *busaddr;
        vm_pindex_t pages;
} drm_sg_mem_t;

/**
 * Kernel side of a mapping
 */
struct drm_local_map {
        resource_size_t offset;  /**< Requested physical address (0 for SAREA)*/
        unsigned long size;      /**< Requested physical size (bytes) */
        enum drm_map_type type;  /**< Type of memory to map */
        enum drm_map_flags flags;        /**< Flags */
        void *handle;            /**< User-space: "Handle" to pass to mmap() */
                                 /**< Kernel-space: kernel-virtual address */
        int mtrr;                /**< MTRR slot used */
};

typedef struct drm_local_map drm_local_map_t;

/**
 * Mappings list
 */
struct drm_map_list {
        struct list_head head;          /**< list head */
        struct drm_hash_item hash;
        struct drm_local_map *map;      /**< mapping */
        uint64_t user_token;
        struct drm_master *master;
        struct drm_mm_node *file_offset_node;   /**< fake offset */
};

/* 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;
        dma_addr_t member_mask;
        struct drm_dma_handle *table_handle;
        drm_local_map_t mapping;
        int table_size;
        struct drm_dma_handle *dmah; /* handle for ATI PCIGART table */
};

/**
 * GEM specific mm private for tracking GEM objects
 */
struct drm_gem_mm {
        struct drm_vma_offset_manager vma_manager;
        struct drm_mm offset_manager;   /**< Offset mgmt for buffer objects */
        struct drm_open_hash offset_hash; /**< User token hash table for maps */
        struct unrhdr *idxunr;
};

struct drm_gem_object {
        /** Reference count of this object */
        struct kref refcount;

        /**
         * handle_count - gem file_priv handle count of this object
         *
         * Each handle also holds a reference. Note that when the handle_count
         * drops to 0 any global names (e.g. the id in the flink namespace) will
         * be cleared.
         *
         * Protected by dev->object_name_lock.
         * */
        unsigned handle_count;

        /** Related drm device */
        struct drm_device *dev;

        /** File representing the shmem storage: filp in Linux parlance */
        vm_object_t vm_obj;

        /* Mapping info for this object */
        struct drm_vma_offset_node vma_node;
        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;

#ifdef DUMBBELL_WIP
        /* 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 /* DUMBBELL_WIP */
};

#include "drm_crtc.h"

/**
 * struct drm_master - drm master structure
 *
 * @refcount: Refcount for this master object.
 * @minor: Link back to minor char device we are master for. Immutable.
 * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
 * @unique_len: Length of unique field. Protected by drm_global_mutex.
 * @unique_size: Amount allocated. Protected by drm_global_mutex.
 * @magiclist: Hash of used authentication tokens. Protected by struct_mutex.
 * @magicfree: List of used authentication tokens. Protected by struct_mutex.
 * @lock: DRI lock information.
 * @driver_priv: Pointer to driver-private information.
 */
struct drm_master {

        struct kref refcount; /* 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? */

        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)

#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))

/**
 * 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     (*use_msi)(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 *);
        void    (*reclaim_buffers_locked)(struct drm_device *,
                                          struct drm_file *file_priv);
        int     (*dma_ioctl)(struct drm_device *dev, void *data,
                             struct drm_file *file_priv);
        void    (*dma_ready)(struct drm_device *);
        int     (*dma_quiescent)(struct drm_device *);
        int     (*dma_flush_block_and_flush)(struct drm_device *, int context,
                                             enum drm_lock_flags flags);
        int     (*dma_flush_unblock)(struct drm_device *, int context,
                                     enum drm_lock_flags flags);
        int     (*context_ctor)(struct drm_device *dev, int context);
        int     (*context_dtor)(struct drm_device *dev, int context);
        int     (*kernel_context_switch)(struct drm_device *dev, int old,
                                         int new);
        int     (*kernel_context_switch_unlock)(struct drm_device *dev);
        void    (*irq_preinstall)(struct drm_device *dev);
        int     (*irq_postinstall)(struct drm_device *dev);
        void    (*irq_uninstall)(struct drm_device *dev);
        void    (*irq_handler)(void *arg);

        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);

        /**
         * Called by vblank timestamping code.
         *
         * Return the current display scanout position from a crtc, and an
         * optional accurate ktime_get timestamp of when position was measured.
         *
         * \param dev  DRM device.
         * \param crtc Id of the crtc to query.
         * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
         * \param *vpos Target location for current vertical scanout position.
         * \param *hpos Target location for current horizontal scanout position.
         * \param *stime Target location for timestamp taken immediately before
         *               scanout position query. Can be NULL to skip timestamp.
         * \param *etime Target location for timestamp taken immediately after
         *               scanout position query. Can be NULL to skip timestamp.
         *
         * Returns vpos as a positive number while in active scanout area.
         * Returns vpos as a negative number inside vblank, counting the number
         * of scanlines to go until end of vblank, e.g., -1 means "one scanline
         * until start of active scanout / end of vblank."
         *
         * \return Flags, or'ed together as follows:
         *
         * DRM_SCANOUTPOS_VALID = Query successful.
         * DRM_SCANOUTPOS_INVBL = Inside vblank.
         * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
         * this flag means that returned position may be offset by a constant
         * but unknown small number of scanlines wrt. real scanout position.
         *
         */
        int (*get_scanout_position) (struct drm_device *dev, int crtc,
                                     unsigned int flags,
                                     int *vpos, int *hpos, ktime_t *stime,
                                     ktime_t *etime);

        int     (*get_vblank_timestamp)(struct drm_device *dev, int crtc,
                    int *max_error, struct timeval *vblank_time,
                    unsigned flags);

        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 *);

        struct cdev_pager_ops *gem_pager_ops;

        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);

        int     (*sysctl_init)(struct drm_device *dev,
                    struct sysctl_ctx_list *ctx, struct sysctl_oid *top);
        void    (*sysctl_cleanup)(struct drm_device *dev);

        drm_pci_id_list_t *id_entry;    /* PCI ID, name, and chipset private */

        /**
         * 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);

        int     major;
        int     minor;
        int     patchlevel;
        const char *name;               /* Simple driver name              */
        const char *desc;               /* Longer driver name              */
        const char *date;               /* Date of last major changes.     */

        u32 driver_features;
        int dev_priv_size;
        const struct drm_ioctl_desc *ioctls;
        int num_ioctls;
};

/**
 * Info file list entry. This structure represents a debugfs or proc file to
 * be created by the drm core
 */
struct drm_info_list {
        const char *name; /** file name */
        int (*show)(struct seq_file*, void*); /** show callback */
        u32 driver_features; /**< Required driver features for this entry */
        void *data;
};

/**
 * debugfs node structure. This structure represents a debugfs file.
 */
struct drm_info_node {
        struct list_head list;
        struct drm_minor *minor;
        const struct drm_info_list *info_ent;
        struct dentry *dent;
};

/**
 * DRM minor structure. This structure represents a drm minor number.
 */
struct drm_minor {
        int index;                      /**< Minor device number */
        int type;                       /**< Control or render */
        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 drm_pending_vblank_event {
        struct drm_pending_event base;
        int pipe;
        struct drm_event_vblank event;
};

struct drm_sysctl_info {
        struct sysctl_ctx_list ctx;
        char   name[2];
};

/* Length for the array of resource pointers for drm_get_resource_*. */
#define DRM_MAX_PCI_RESOURCE    6

struct drm_vblank_crtc {
        struct drm_device *dev;         /* pointer to the drm_device */
        wait_queue_head_t queue;        /**< VBLANK wait queue */
        struct timeval time[DRM_VBLANKTIME_RBSIZE];     /**< timestamp of current count */
        struct timer_list disable_timer;                /* delayed disable timer */
        atomic_t count;                 /**< number of VBLANK interrupts */
        atomic_t refcount;              /* number of users of vblank interruptsper crtc */
        u32 last;                       /* protected by dev->vbl_lock, used */
                                        /* for wraparound handling */
        u32 last_wait;                  /* Last vblank seqno waited per CRTC */
        unsigned int inmodeset;         /* Display driver is setting mode */
        int crtc;                       /* crtc index */
        bool enabled;                   /* so we don't call enable more than
                                           once per disable */
};

/**
 * DRM device structure. This structure represent a complete card that
 * may contain multiple heads.
 */
struct drm_device {
        drm_pci_id_list_t *id_entry;    /* PCI ID, name, and chipset private */

        uint16_t pci_subdevice;         /* PCI subsystem device id */
        uint16_t pci_subvendor;         /* PCI subsystem vendor id */

        char              *unique;      /* Unique identifier: e.g., busid  */
        int               unique_len;   /* Length of unique field          */
        struct cdev       *devnode;     /* Device number for mknod         */
        int               if_version;   /* Highest interface version set */

        int               flags;        /* Flags to open(2)                */

                                /* Locks */
        struct spinlock   dma_lock;     /* protects dev->dma */
        struct lwkt_serialize irq_lock; /* protects irq condition checks */
        struct lock       dev_lock;     /* protects everything else */

        /** \name Locks */
        /*@{ */
        struct lock struct_mutex;       /**< For others */
        struct lock master_mutex;       /**< For drm_minor::master */
        /*@} */

        /** \name Usage Counters */
        /*@{ */
        int open_count;                 /**< Outstanding files open, protected by drm_global_mutex. */
        struct spinlock buf_lock;       /**< For drm_device::buf_use and a few other things. */
        int buf_use;                    /**< Buffers in use -- cannot alloc */
        atomic_t buf_alloc;             /**< Buffer allocation in progress */
        /*@} */


        /** \name Performance counters */
        /*@{ */
        unsigned long     counters;
        enum drm_stat_type      types[15];
        atomic_t          counts[15];
        /*@} */

                                /* Authentication */
        struct drm_open_hash magiclist; /**< magic hash table */
        struct list_head magicfree;

        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 lock ctxlist_mutex;      /**< For ctxlist */

        struct idr ctx_idr;

        /*@} */

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

                                /* DMA queues (contexts) */
        drm_device_dma_t  *dma;         /* Optional pointer for DMA support */

        int               irq;          /* Interrupt used by board         */
        int               irq_type;     /* IRQ type (MSI enabled or not) */
        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_* */
        struct resource   *pcir[DRM_MAX_PCI_RESOURCE];
        int               pcirid[DRM_MAX_PCI_RESOURCE];

        int               pci_domain;
        int               pci_bus;
        int               pci_slot;
        int               pci_func;

        /** \name Context support */
        /*@{ */
        int irq_enabled;                /**< True if irq handler is enabled */
        __volatile__ long context_flag; /**< Context swapping flag */
        __volatile__ long interrupt_flag; /**< Interruption handler flag */
        __volatile__ long dma_flag;     /**< DMA dispatch flag */
        wait_queue_head_t context_wait; /**< Processes waiting on ctx switch */
        int last_checked;               /**< Last context checked for DMA */
        int last_context;               /**< Last current context */
        unsigned long last_switch;      /**< jiffies at last context switch */
        /*@} */

        /** \name VBLANK IRQ support */
        /*@{ */

        /*
         * At load time, disabling the vblank interrupt won't be allowed since
         * old clients may not call the modeset ioctl and therefore misbehave.
         * Once the modeset ioctl *has* been called though, we can safely
         * disable them when unused.
         */
        bool vblank_disable_allowed;

        /* array of size num_crtcs */
        struct drm_vblank_crtc *vblank;

        struct lock vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
        struct lock vbl_lock;
        struct timer_list vblank_disable_timer;

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

        /**
         * List of events
         */
        struct list_head vblank_event_list;
        struct lock event_lock;

        /*@} */

        struct sigio      *buf_sigio;   /* Processes waiting for SIGIO     */

                                /* Sysctl support */
        struct drm_sysctl_info *sysctl;
        int               sysctl_node_idx;


        drm_sg_mem_t      *sg;  /* Scatter gather memory */
        unsigned int num_crtcs;                  /**< Number of CRTCs on this device */

        unsigned long     *ctx_bitmap;
        void              *dev_private;

        void              *drm_ttm_bdev;

        /*@} */

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

        struct device *dev;             /**< Device structure */
        struct pci_dev *pdev;           /**< PCI device structure */
        int pci_vendor;                 /**< PCI vendor id */
        int pci_device;                 /**< PCI device id */

        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 lock object_name_lock;
        struct idr object_name_idr;
        /*@} */
        void             *mm_private;

        void *sysctl_private;
        char busid_str[128];
        int modesetting;

        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
#define DRM_SWITCH_POWER_DYNAMIC_OFF 3

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

static inline void drm_device_set_unplugged(struct drm_device *dev)
{
        smp_wmb();
        atomic_set(&dev->unplugged, 1);
}

static inline int drm_device_is_unplugged(struct drm_device *dev)
{
        int ret = atomic_read(&dev->unplugged);
        smp_rmb();
        return ret;
}

static inline bool drm_is_primary_client(const struct drm_file *file_priv)
{
        return 0 /* file_priv->minor->type == DRM_MINOR_LEGACY */;
}

/**
 * drm_is_master() - Check whether a DRM open-file is DRM-Master
 * @file: DRM open-file context
 *
 * This checks whether a DRM open-file context is owner of the master context
 * attached to it. If a file owns a master context, it's called DRM-Master.
 * Per DRM device, only one such file can be DRM-Master at a time.
 *
 * Returns: True if the file is DRM-Master, otherwise false.
 */
static inline bool drm_is_master(const struct drm_file *file)
{
#if 0
        return file->master && file->master == file->minor->master;
#else
        return true;
#endif
}

/******************************************************************/
/** \name Internal function definitions */
/*@{*/

#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

extern int      drm_notyet_flag;
extern unsigned int drm_rnodes;
extern unsigned int drm_universal_planes;

extern unsigned int drm_vblank_offdelay;
extern unsigned int drm_timestamp_precision;
extern unsigned int drm_timestamp_monotonic;

                                /* Driver support (drm_drv.h) */
int     drm_probe(device_t kdev, drm_pci_id_list_t *idlist);
int     drm_attach(device_t kdev, drm_pci_id_list_t *idlist);
int     drm_create_cdevs(device_t kdev);
d_ioctl_t drm_ioctl;
extern int drm_lastclose(struct drm_device *dev);
extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);

                                /* Device support (drm_fops.h) */
extern struct lock drm_global_mutex;
d_open_t drm_open;
d_close_t drm_close;
d_read_t drm_read;
d_kqfilter_t drm_kqfilter;
int drm_release(device_t kdev);

d_mmap_t drm_mmap;
d_mmap_single_t drm_mmap_single;
extern drm_local_map_t  *drm_getsarea(struct drm_device *dev);

void drm_cdevpriv_dtor(void *cd);

int drm_add_busid_modesetting(struct drm_device *dev,
    struct sysctl_ctx_list *ctx, struct sysctl_oid *top);

/* File operations helpers (drm_fops.c) */
extern int              drm_open_helper(struct cdev *kdev, int flags, int fmt,
                                         DRM_STRUCTPROC *p,
                                        struct drm_device *dev,
                                        struct file *fp);
extern struct drm_file  *drm_find_file_by_proc(struct drm_device *dev,
                                        DRM_STRUCTPROC *p);

#ifdef DUMBBELL_WIP
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);
#endif /* DUMBBELL_WIP */
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);

int drm_gem_dumb_destroy(struct drm_file *file,
                         struct drm_device *dev,
                         uint32_t handle);

#ifdef DUMBBELL_WIP
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 /* DUMBBELL_WIP */

                                /* Memory management support (drm_memory.h) */
#include <drm/drm_memory.h>
void    drm_mem_init(void);
void    drm_mem_uninit(void);
void    *drm_ioremap_wc(struct drm_device *dev, drm_local_map_t *map);
void    *drm_ioremap(struct drm_device *dev, drm_local_map_t *map);
void    drm_ioremapfree(drm_local_map_t *map);
int     drm_mtrr_add(unsigned long offset, size_t size, int flags);
int     drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags);

/* Locking IOCTL support (drm_lock.c) */
int     drm_lock_take(struct drm_lock_data *lock_data,
                      unsigned int context);
int     drm_lock_transfer(struct drm_lock_data *lock_data,
                          unsigned int context);
int     drm_lock_free(struct drm_lock_data *lock_data,
                      unsigned int context);

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

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);

/* DMA support (drm_dma.c) */
int     drm_dma_setup(struct drm_device *dev);
void    drm_dma_takedown(struct drm_device *dev);
void    drm_free_buffer(struct drm_device *dev, drm_buf_t *buf);
void    drm_reclaim_buffers(struct drm_device *dev, struct drm_file *file_priv);
#define drm_core_reclaim_buffers drm_reclaim_buffers

                                /* IRQ support (drm_irq.h) */
extern int drm_irq_install(struct drm_device *dev, int irq);
int     drm_irq_uninstall(struct drm_device *dev);
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);

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 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 int drm_crtc_vblank_get(struct drm_crtc *crtc);
extern void drm_crtc_vblank_put(struct drm_crtc *crtc);
extern void drm_vblank_off(struct drm_device *dev, int crtc);
extern void drm_vblank_on(struct drm_device *dev, int crtc);
extern void drm_crtc_vblank_off(struct drm_crtc *crtc);
extern void drm_crtc_vblank_on(struct drm_crtc *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,
                                                 const struct drm_crtc *refcrtc,
                                                 const struct drm_display_mode *mode);
extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
                                            const struct drm_display_mode *mode);

/* 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/PCI Express/GART support (drm_agpsupport.c) */
int     drm_device_is_agp(struct drm_device *dev);
int     drm_device_is_pcie(struct drm_device *dev);
drm_agp_head_t *drm_agp_init(void);
int     drm_agp_acquire(struct drm_device *dev);
int     drm_agp_release(struct drm_device *dev);
int     drm_agp_info(struct drm_device * dev, struct drm_agp_info *info);
int     drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
void    *drm_agp_allocate_memory(size_t pages, u32 type);
int     drm_agp_free_memory(void *handle);
int     drm_agp_bind_memory(void *handle, off_t start);
int     drm_agp_unbind_memory(void *handle);
int     drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
int     drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
int     drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
int     drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);

                                /* Scatter Gather Support (drm_scatter.h) */
extern void drm_legacy_sg_cleanup(struct drm_device *dev);
extern int drm_sg_alloc(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);

/* Scatter Gather Support (drm_scatter.c) */
void    drm_sg_cleanup(drm_sg_mem_t *entry);

/* sysctl support (drm_sysctl.h) */
extern int              drm_sysctl_init(struct drm_device *dev);
extern int              drm_sysctl_cleanup(struct drm_device *dev);

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

/* Cache management (drm_memory.c) */
void    drm_clflush_pages(vm_page_t *pages, unsigned long num_pages);

/* Locking IOCTL support (drm_drv.c) */
int     drm_lock(struct drm_device *dev, void *data,
                 struct drm_file *file_priv);
int     drm_unlock(struct drm_device *dev, void *data,
                   struct drm_file *file_priv);
int     drm_setversion(struct drm_device *dev, void *data,
                       struct drm_file *file_priv);

/*
 * 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);
void    drm_rmmap(struct drm_device *dev, drm_local_map_t *map);
int     drm_rmmap_ioctl(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
int     drm_addbufs(struct drm_device *dev, void *data,
                    struct drm_file *file_priv);
int     drm_infobufs(struct drm_device *dev, void *data,
                     struct drm_file *file_priv);
int     drm_markbufs(struct drm_device *dev, void *data,
                     struct drm_file *file_priv);
int     drm_freebufs(struct drm_device *dev, void *data,
                     struct drm_file *file_priv);
int     drm_mapbufs(struct drm_device *dev, void *data,
                    struct drm_file *file_priv);
extern int drm_dma_ioctl(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);

/* Misc. IOCTL support (drm_ioctl.c) */
int     drm_irq_by_busid(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
int     drm_getunique(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
int     drm_setunique(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
int     drm_getmap(struct drm_device *dev, void *data,
                   struct drm_file *file_priv);
int     drm_getclient(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
int     drm_getstats(struct drm_device *dev, void *data,
                     struct drm_file *file_priv);
int     drm_getcap(struct drm_device *dev, void *data,
                     struct drm_file *file_priv);
extern int drm_setclientcap(struct drm_device *dev, void *data,
                            struct drm_file *file_priv);
int     drm_noop(struct drm_device *dev, void *data,
                 struct drm_file *file_priv);

/* Authentication IOCTL support (drm_auth.c) */
int     drm_getmagic(struct drm_device *dev, void *data,
                     struct drm_file *file_priv);
int     drm_authmagic(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);

/* Cache management (drm_cache.c) */
void drm_clflush_virt_range(void *addr, unsigned long length);

/* DMA support (drm_dma.c) */
int     drm_dma(struct drm_device *dev, void *data, struct drm_file *file_priv);

/* IRQ support (drm_irq.c) */
int     drm_control(struct drm_device *dev, void *data,
                    struct drm_file *file_priv);

/* AGP/GART support (drm_agpsupport.c) */
int     drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
int     drm_agp_release_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
int     drm_agp_enable_ioctl(struct drm_device *dev, void *data,
                             struct drm_file *file_priv);
int     drm_agp_info_ioctl(struct drm_device *dev, void *data,
                           struct drm_file *file_priv);
int     drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
                            struct drm_file *file_priv);
int     drm_agp_free_ioctl(struct drm_device *dev, void *data,
                           struct drm_file *file_priv);
int     drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
                             struct drm_file *file_priv);
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);

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

/* Scatter Gather Support (drm_scatter.c) */
int     drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
                           struct drm_file *file_priv);
int     drm_sg_free(struct drm_device *dev, void *data,
                    struct drm_file *file_priv);

/* consistent PCI memory functions (drm_pci.c) */
extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
                                       size_t align);
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 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);
int drm_gem_object_init(struct drm_device *dev,
                        struct drm_gem_object *obj, size_t size);
void drm_gem_private_object_init(struct drm_device *dev,
                                 struct drm_gem_object *obj, size_t size);
void drm_gem_vm_open(struct vm_area_struct *vma);
void drm_gem_vm_close(struct vm_area_struct *vma);
int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
                     struct vm_area_struct *vma);
int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);

int i915_gem_pager_ctor(void *handle, vm_ooffset_t size, vm_prot_t prot,
    vm_ooffset_t foff, struct ucred *cred, u_short *color);
void i915_gem_pager_dtor(void * handle);

#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;
                DRM_LOCK(dev);
                kref_put(&obj->refcount, drm_gem_object_free);
                DRM_UNLOCK(dev);
        }
}

int drm_gem_handle_create_tail(struct drm_file *file_priv,
                               struct drm_gem_object *obj,
                               u32 *handlep);
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);

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_priv);
void drm_gem_release(struct drm_device *dev, struct drm_file *file_priv);

void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);

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);

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);

void drm_device_lock_mtx(struct drm_device *dev);
void drm_device_unlock_mtx(struct drm_device *dev);
int drm_device_sleep_mtx(struct drm_device *dev, void *chan, int flags,
    const char *msg, int timeout);
void drm_device_assert_mtx_locked(struct drm_device *dev);
void drm_device_assert_mtx_unlocked(struct drm_device *dev);

void drm_device_lock_struct(struct drm_device *dev);
void drm_device_unlock_struct(struct drm_device *dev);
int drm_device_sleep_struct(struct drm_device *dev, void *chan, int flags,
    const char *msg, int timeout);
void drm_device_assert_struct_locked(struct drm_device *dev);
void drm_device_assert_struct_unlocked(struct drm_device *dev);

void drm_compat_locking_init(struct drm_device *dev);
void drm_sleep_locking_init(struct drm_device *dev);

/* XXX glue logic, should be done in drm_pci_init(), pending drm update */
void drm_init_pdev(struct device *dev, struct pci_dev **pdev);
void drm_fini_pdev(struct pci_dev **pdev);

/* Inline replacements for drm_alloc and friends */
static __inline__ void *
drm_alloc(size_t size, struct malloc_type *area)
{
        return kmalloc(size, area, M_WAITOK | M_NULLOK);
}

static __inline__ void *
drm_calloc(size_t nmemb, size_t size, struct malloc_type *area)
{
        return kmalloc(size * nmemb, area, M_WAITOK | M_NULLOK | M_ZERO);
}

static __inline__ void
drm_free(void *pt, struct malloc_type *area)
{
        kfree(pt);
}

static __inline__ void
drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev)
{
        map->handle = drm_ioremap_wc(dev, map);
}
static __inline__ void
drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev)
{
        map->handle = drm_ioremap(dev, map);
}
static __inline__ void
drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev)
{
        if ( map->handle && map->size )
                drm_ioremapfree(map);
}

static __inline__ struct drm_local_map *
drm_core_findmap(struct drm_device *dev, unsigned long offset)
{
        struct drm_map_list *_entry;

        list_for_each_entry(_entry, &dev->maplist, head) {
                if (offset == (unsigned long)_entry->map->handle)
                        return _entry->map;
        }
        return NULL;
}

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

#include <drm/drm_mem_util.h>

struct drm_device *drm_dev_alloc(struct drm_driver *driver,
                                 struct device *parent);
void drm_dev_ref(struct drm_device *dev);
void drm_dev_unref(struct drm_device *dev);
int drm_dev_register(struct drm_device *dev, unsigned long flags);
void drm_dev_unregister(struct drm_device *dev);
int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...);

/* FreeBSD compatibility macros */
#define VM_OBJECT_WLOCK(object)         VM_OBJECT_LOCK(object)
#define VM_OBJECT_WUNLOCK(object)       VM_OBJECT_UNLOCK(object)

#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);

/* XXX bad */
#define drm_can_sleep() (HZ & 1)

#endif /* __KERNEL__ */
#endif /* _DRM_P_H_ */