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/* drmP.h -- Private header for Direct Rendering Manager -*- linux-c -*-

 * Created: Mon Jan  4 10:05:05 1999 by faith@precisioninsight.com

 *

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

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

 * 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.

 *

 * Authors:

 *    Rickard E. (Rik) Faith <faith@valinux.com>

 *    Gareth Hughes <gareth@valinux.com>

 */

#ifndef _DRM_P_H_

#define _DRM_P_H_

#ifdef __KERNEL__

#ifdef __alpha__

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

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

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

#include <asm/current.h>

#endif /* __alpha__ */

#include <linux/config.h>

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/miscdevice.h>

#include <linux/fs.h>

#include <linux/proc_fs.h>

#include <linux/init.h>

#include <linux/file.h>

#include <linux/pci.h>

#include <linux/wrapper.h>

#include <linux/version.h>

#include <linux/sched.h>

#include <linux/smp_lock.h>     /* For (un)lock_kernel */

#include <linux/mm.h>

#include <linux/pagemap.h>

#if defined(__alpha__) || defined(__powerpc__)

#include <asm/pgtable.h> /* For pte_wrprotect */

#endif

#include <asm/io.h>

#include <asm/mman.h>

#include <asm/uaccess.h>

#ifdef CONFIG_MTRR

#include <asm/mtrr.h>

#endif

#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)

#include <linux/types.h>

#include <linux/agp_backend.h>

#endif

#include <linux/tqueue.h>

#include <linux/poll.h>

#include <asm/pgalloc.h>

#include "drm.h"

#include "drm_os_linux.h"

/* DRM template customization defaults

 */

#ifndef __HAVE_AGP

#define __HAVE_AGP              0

#endif

#ifndef __HAVE_MTRR

#define __HAVE_MTRR             0

#endif

#ifndef __HAVE_CTX_BITMAP

#define __HAVE_CTX_BITMAP       0

#endif

#ifndef __HAVE_DMA

#define __HAVE_DMA              0

#endif

#ifndef __HAVE_DMA_IRQ

#define __HAVE_DMA_IRQ          0

#endif

#ifndef __HAVE_DMA_WAITLIST

#define __HAVE_DMA_WAITLIST     0

#endif

#ifndef __HAVE_DMA_FREELIST

#define __HAVE_DMA_FREELIST     0

#endif

#ifndef __HAVE_DMA_HISTOGRAM

#define __HAVE_DMA_HISTOGRAM    0

#endif

#define __REALLY_HAVE_AGP       (__HAVE_AGP && (defined(CONFIG_AGP) || \

                                                defined(CONFIG_AGP_MODULE)))

#define __REALLY_HAVE_MTRR      (__HAVE_MTRR && defined(CONFIG_MTRR))

                                /* Generic cmpxchg added in 2.3.x */

#ifndef __HAVE_ARCH_CMPXCHG

                                /* Include this here so that driver can be

                                   used with older kernels. */

#if defined(__alpha__)

static __inline__ unsigned long

__cmpxchg_u32(volatile int *m, int old, int new)

{

        unsigned long prev, cmp;

        __asm__ __volatile__(

        "1:     ldl_l %0,%2\n"

        "       cmpeq %0,%3,%1\n"

        "       beq %1,2f\n"

        "       mov %4,%1\n"

        "       stl_c %1,%2\n"

        "       beq %1,3f\n"

        "2:     mb\n"

        ".subsection 2\n"

        "3:     br 1b\n"

        ".previous"

        : "=&r"(prev), "=&r"(cmp), "=m"(*m)

        : "r"((long) old), "r"(new), "m"(*m));

        return prev;

}

static __inline__ unsigned long

__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)

{

        unsigned long prev, cmp;

        __asm__ __volatile__(

        "1:     ldq_l %0,%2\n"

        "       cmpeq %0,%3,%1\n"

        "       beq %1,2f\n"

        "       mov %4,%1\n"

        "       stq_c %1,%2\n"

        "       beq %1,3f\n"

        "2:     mb\n"

        ".subsection 2\n"

        "3:     br 1b\n"

        ".previous"

        : "=&r"(prev), "=&r"(cmp), "=m"(*m)

        : "r"((long) old), "r"(new), "m"(*m));

        return prev;

}

static __inline__ unsigned long

__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)

{

        switch (size) {

                case 4:

                        return __cmpxchg_u32(ptr, old, new);

                case 8:

                        return __cmpxchg_u64(ptr, old, new);

        }

        return old;

}

#define cmpxchg(ptr,o,n)                                                 \

  ({                                                                     \

     __typeof__(*(ptr)) _o_ = (o);                                       \

     __typeof__(*(ptr)) _n_ = (n);                                       \

     (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,           \

                                    (unsigned long)_n_, sizeof(*(ptr))); \

  })

#elif __i386__

static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,

                                      unsigned long new, int size)

{

        unsigned long prev;

        switch (size) {

        case 1:

                __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"

                                     : "=a"(prev)

                                     : "q"(new), "m"(*__xg(ptr)), "0"(old)

                                     : "memory");

                return prev;

        case 2:

                __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"

                                     : "=a"(prev)

                                     : "q"(new), "m"(*__xg(ptr)), "0"(old)

                                     : "memory");

                return prev;

        case 4:

                __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"

                                     : "=a"(prev)

                                     : "q"(new), "m"(*__xg(ptr)), "0"(old)

                                     : "memory");

                return prev;

        }

        return old;

}

#define cmpxchg(ptr,o,n)                                                \

  ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),              \

                                 (unsigned long)(n),sizeof(*(ptr))))

#endif /* i386 & alpha */

#endif

#define __REALLY_HAVE_SG        (__HAVE_SG)

/* Begin the DRM...

 */

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

                                     also include looping detection. */

#define DRM_HASH_SIZE         16 /* Size of key hash table                */

#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_BSZ               1024 /* Buffer size for /dev/drm? output    */

#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_FLAG_NOCTX    0x02

#define DRM_MEM_DMA        0

#define DRM_MEM_SAREA      1

#define DRM_MEM_DRIVER     2

#define DRM_MEM_MAGIC      3

#define DRM_MEM_IOCTLS     4

#define DRM_MEM_MAPS       5

#define DRM_MEM_VMAS       6

#define DRM_MEM_BUFS       7

#define DRM_MEM_SEGS       8

#define DRM_MEM_PAGES      9

#define DRM_MEM_FILES     10

#define DRM_MEM_QUEUES    11

#define DRM_MEM_CMDS      12

#define DRM_MEM_MAPPINGS  13

#define DRM_MEM_BUFLISTS  14

#define DRM_MEM_AGPLISTS  15

#define DRM_MEM_TOTALAGP  16

#define DRM_MEM_BOUNDAGP  17

#define DRM_MEM_CTXBITMAP 18

#define DRM_MEM_STUB      19

#define DRM_MEM_SGLISTS   20

#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)

                                /* Backward compatibility section */

#ifndef minor

#define minor(x) MINOR((x))

#endif

#ifndef MODULE_LICENSE

#define MODULE_LICENSE(x) 

#endif

#ifndef pte_offset_map 

#define pte_offset_map pte_offset

#define pte_unmap(pte)

#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,19)

static inline struct page * vmalloc_to_page(void * vmalloc_addr)

{

        unsigned long addr = (unsigned long) vmalloc_addr;

        struct page *page = NULL;

        pgd_t *pgd = pgd_offset_k(addr);

        pmd_t *pmd;

        pte_t *ptep, pte;

        if (!pgd_none(*pgd)) {

                pmd = pmd_offset(pgd, addr);

                if (!pmd_none(*pmd)) {

                        ptep = pte_offset_map(pmd, addr);

                        pte = *ptep;

                        if (pte_present(pte))

                                page = pte_page(pte);

                        pte_unmap(ptep);

                }

        }

        return page;

}

#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)

#define DRM_RPR_ARG(vma)

#else

#define DRM_RPR_ARG(vma) vma,

#endif

#define VM_OFFSET(vma) ((vma)->vm_pgoff << PAGE_SHIFT)

                                /* Macros to make printk easier */

#define DRM_ERROR(fmt, arg...) \

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

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

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

               DRM(mem_stats)[area].name , ##arg)

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

#if DRM_DEBUG_CODE

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

        do {                                                            \

                if ( DRM(flags) & DRM_FLAG_DEBUG )                      \

                        printk(KERN_DEBUG                               \

                               "[" DRM_NAME ":%s] " fmt ,       \

                               __FUNCTION__ , ##arg);                   \

        } while (0)

#else

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

#endif

#define DRM_PROC_LIMIT (PAGE_SIZE-80)

#define DRM_PROC_PRINT(fmt, arg...)                                     \

   len += sprintf(&buf[len], fmt , ##arg);                              \

   if (len > DRM_PROC_LIMIT) { *eof = 1; return len - offset; }

#define DRM_PROC_PRINT_RET(ret, fmt, arg...)                            \

   len += sprintf(&buf[len], fmt , ##arg);                              \

   if (len > DRM_PROC_LIMIT) { ret; *eof = 1; return len - offset; }

                                /* Mapping helper macros */

#define DRM_IOREMAP(map, dev)                                   \

        (map)->handle = DRM(ioremap)((map)->offset, (map)->size, (dev) )

#define DRM_IOREMAP_NOCACHE(map, dev)                                   \

        (map)->handle = DRM(ioremap_nocache)((map)->offset, (map)->size, (dev) )

#define DRM_IOREMAPFREE(map, dev)                                               \

        do {                                                            \

                if ( (map)->handle && (map)->size )                     \

                        DRM(ioremapfree)( (map)->handle, (map)->size, (dev) );  \

        } while (0)

#define DRM_FIND_MAP(_map, _o)                                          \

do {                                                                    \

        struct list_head *_list;                                        \

        list_for_each( _list, &dev->maplist->head ) {                   \

                drm_map_list_t *_entry = (drm_map_list_t *)_list;       \

                if ( _entry->map &&                                     \

                     _entry->map->offset == (_o) ) {                    \

                        (_map) = _entry->map;                           \

                        break;                                          \

                }                                                       \

        }                                                               \

} while(0)

                                /* Internal types and structures */

#define DRM_ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))

#define DRM_MIN(a,b) ((a)<(b)?(a):(b))

#define DRM_MAX(a,b) ((a)>(b)?(a):(b))

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

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

#define DRM_WAITCOUNT(dev,idx) DRM_BUFCOUNT(&dev->queuelist[idx]->waitlist)

#define DRM_GET_PRIV_SAREA(_dev, _ctx, _map) do {       \

        (_map) = (_dev)->context_sareas[_ctx];          \

} while(0)

typedef int drm_ioctl_t( struct inode *inode, struct file *filp,

                         unsigned int cmd, unsigned long arg );

typedef struct drm_pci_list {

        u16 vendor;

        u16 device;

} drm_pci_list_t;

typedef struct drm_ioctl_desc {

        drm_ioctl_t          *func;

        int                  auth_needed;

        int                  root_only;

} drm_ioctl_desc_t;

typedef struct drm_devstate {

        pid_t             owner;        /* X server pid holding x_lock */

} drm_devstate_t;

typedef struct drm_magic_entry {

        drm_magic_t            magic;

        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_vma_entry {

        struct vm_area_struct *vma;

        struct drm_vma_entry  *next;

        pid_t                 pid;

} drm_vma_entry_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              */

        wait_queue_head_t dma_wait;    /* Processes waiting                  */

        pid_t             pid;         /* PID of holding process             */

        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                */

#if DRM_DMA_HISTOGRAM

        cycles_t          time_queued;     /* Queued to kernel DMA queue     */

        cycles_t          time_dispatched; /* Dispatched to hardware         */

        cycles_t          time_completed;  /* Completed by hardware          */

        cycles_t          time_freed;      /* Back on freelist               */

#endif

        int               dev_priv_size; /* Size of buffer private stoarge   */

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

} drm_buf_t;

#if DRM_DMA_HISTOGRAM

#define DRM_DMA_HISTOGRAM_SLOTS           9

#define DRM_DMA_HISTOGRAM_INITIAL        10

#define DRM_DMA_HISTOGRAM_NEXT(current)  ((current)*10)

typedef struct drm_histogram {

        atomic_t          total;

        atomic_t          queued_to_dispatched[DRM_DMA_HISTOGRAM_SLOTS];

        atomic_t          dispatched_to_completed[DRM_DMA_HISTOGRAM_SLOTS];

        atomic_t          completed_to_freed[DRM_DMA_HISTOGRAM_SLOTS];

        atomic_t          queued_to_completed[DRM_DMA_HISTOGRAM_SLOTS];

        atomic_t          queued_to_freed[DRM_DMA_HISTOGRAM_SLOTS];

        atomic_t          dma[DRM_DMA_HISTOGRAM_SLOTS];

        atomic_t          schedule[DRM_DMA_HISTOGRAM_SLOTS];

        atomic_t          ctx[DRM_DMA_HISTOGRAM_SLOTS];

        atomic_t          lacq[DRM_DMA_HISTOGRAM_SLOTS];

        atomic_t          lhld[DRM_DMA_HISTOGRAM_SLOTS];

} drm_histogram_t;

#endif

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

typedef struct drm_waitlist {

        int               count;        /* Number of possible buffers      */

        drm_buf_t         **bufs;       /* List of pointers to buffers     */

        drm_buf_t         **rp;         /* Read pointer                    */

        drm_buf_t         **wp;         /* Write pointer                   */

        drm_buf_t         **end;        /* End pointer                     */

        spinlock_t        read_lock;

        spinlock_t        write_lock;

} drm_waitlist_t;

typedef struct drm_freelist {

        int               initialized; /* Freelist in use                  */

        atomic_t          count;       /* Number of free buffers           */

        drm_buf_t         *next;       /* End pointer                      */

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

        int               low_mark;    /* Low water mark                   */

        int               high_mark;   /* High water mark                  */

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

        spinlock_t        lock;

} drm_freelist_t;

typedef struct drm_buf_entry {

        int               buf_size;

        int               buf_count;

        drm_buf_t         *buflist;

        int               seg_count;

        int               page_order;

        unsigned long     *seglist;

        drm_freelist_t    freelist;

} drm_buf_entry_t;

typedef struct drm_hw_lock {

        __volatile__ unsigned int lock;

        char                      padding[60]; /* Pad to cache line */

} drm_hw_lock_t;

typedef struct drm_file {

        int               authenticated;

        int               minor;

        pid_t             pid;

        uid_t             uid;

        drm_magic_t       magic;

        unsigned long     ioctl_count;

        struct drm_file   *next;

        struct drm_file   *prev;

        struct drm_device *dev;

        int               remove_auth_on_close;

} drm_file_t;

typedef 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 */

#if 1

        atomic_t          total_queued; /* Total queued statistic           */

        atomic_t          total_flushed;/* Total flushes statistic          */

        atomic_t          total_locks;  /* Total locks statistics           */

#endif

        drm_ctx_flags_t   flags;        /* Context preserving and 2D-only   */

        drm_waitlist_t    waitlist;     /* Pending buffers                  */

        wait_queue_head_t flush_queue;  /* Processes waiting until flush    */

} drm_queue_t;

typedef struct drm_lock_data {

        drm_hw_lock_t     *hw_lock;     /* Hardware lock                   */

        pid_t             pid;          /* PID of lock holder (0=kernel)   */

        wait_queue_head_t lock_queue;   /* Queue of blocked processes      */

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

} drm_lock_data_t;

typedef struct drm_device_dma {

#if 0

                                /* Performance Counters */

        atomic_t          total_prio;   /* Total DRM_DMA_PRIORITY          */

        atomic_t          total_bytes;  /* Total bytes DMA'd               */

        atomic_t          total_dmas;   /* Total DMA buffers dispatched    */

        atomic_t          total_missed_dma;  /* Missed drm_do_dma           */

        atomic_t          total_missed_lock; /* Missed lock in drm_do_dma   */

        atomic_t          total_missed_free; /* Missed drm_free_this_buffer */

        atomic_t          total_missed_sched;/* Missed drm_dma_schedule     */

        atomic_t          total_tried;  /* Tried next_buffer                */

        atomic_t          total_hit;    /* Sent next_buffer                 */

        atomic_t          total_lost;   /* Lost interrupt                   */

#endif

        drm_buf_entry_t   bufs[DRM_MAX_ORDER+1];

        int               buf_count;

        drm_buf_t         **buflist;    /* Vector of pointers info bufs    */

        int               seg_count;

        int               page_count;

        unsigned long     *pagelist;

        unsigned long     byte_count;

        enum {

                _DRM_DMA_USE_AGP = 0x01,

                _DRM_DMA_USE_SG  = 0x02

        } flags;

                                /* DMA support */

        drm_buf_t         *this_buffer; /* Buffer being sent               */

        drm_buf_t         *next_buffer; /* Selected buffer to send         */

        drm_queue_t       *next_queue;  /* Queue from which buffer selected*/

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

} drm_device_dma_t;

#if __REALLY_HAVE_AGP

typedef struct drm_agp_mem {

        unsigned long      handle;

        agp_memory         *memory;

        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 {

        agp_kern_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;

#endif

typedef struct drm_sg_mem {

        unsigned long   handle;

        void            *virtual;

        int             pages;

        struct page     **pagelist;

        dma_addr_t      *busaddr;

} drm_sg_mem_t;

typedef struct drm_sigdata {

        int           context;

        drm_hw_lock_t *lock;

} drm_sigdata_t;

typedef struct drm_map_list {

        struct list_head        head;

        drm_map_t               *map;

} drm_map_list_t;

#if __HAVE_VBL_IRQ

typedef struct drm_vbl_sig {

        struct list_head        head;

        unsigned int            sequence;

        struct siginfo          info;

        struct task_struct      *task;

} drm_vbl_sig_t;

#endif

typedef struct drm_device {

        const char        *name;        /* Simple driver name              */

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

        int               unique_len;   /* Length of unique field          */

        dev_t             device;       /* Device number for mknod         */

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

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

        struct proc_dir_entry *root;    /* Root for this device's entries  */

                                /* Locks */

        spinlock_t        count_lock;   /* For inuse, open_count, buf_use  */

        struct semaphore  struct_sem;   /* For others                      */

                                /* 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   */

                                /* Performance counters */

        unsigned long     counters;

        drm_stat_type_t   types[15];

        atomic_t          counts[15];

                                /* Authentication */

        drm_file_t        *file_first;

        drm_file_t        *file_last;

        drm_magic_head_t  magiclist[DRM_HASH_SIZE];

                                /* Memory management */

        drm_map_list_t    *maplist;     /* Linked list of regions          */

        int               map_count;    /* Number of mappable regions      */

        drm_map_t         **context_sareas;

        int               max_context;

        drm_vma_entry_t   *vmalist;     /* List of vmas (for debugging)    */

        drm_lock_data_t   lock;         /* Information on hardware lock    */

                                /* DMA queues (contexts) */

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

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

        int               queue_slots;  /* Actual length of queuelist      */

        drm_queue_t       **queuelist;  /* Vector of pointers to DMA queues */

        drm_device_dma_t  *dma;         /* Optional pointer for DMA support */

                                /* Context support */

        int               irq;          /* Interrupt used by board         */

        __volatile__ long context_flag; /* Context swapping flag           */

        __volatile__ long interrupt_flag; /* Interruption handler flag     */

        __volatile__ long dma_flag;     /* DMA dispatch flag               */

        struct timer_list timer;        /* Timer for delaying ctx switch   */

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

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

        int               last_context; /* Last current context            */

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

        struct tq_struct  tq;

#if __HAVE_VBL_IRQ

        wait_queue_head_t vbl_queue;

        atomic_t          vbl_received;

        spinlock_t        vbl_lock;

        drm_vbl_sig_t     vbl_sigs;

        unsigned int      vbl_pending;

#endif

        cycles_t          ctx_start;

        cycles_t          lck_start;

#if __HAVE_DMA_HISTOGRAM

        drm_histogram_t   histo;

#endif

                                /* Callback to X server for context switch

                                   and for heavy-handed reset. */

        char              buf[DRM_BSZ]; /* Output buffer                   */

        char              *buf_rp;      /* Read pointer                    */

        char              *buf_wp;      /* Write pointer                   */

        char              *buf_end;     /* End pointer                     */

        struct fasync_struct *buf_async;/* Processes waiting for SIGIO     */

        wait_queue_head_t buf_readers;  /* Processes waiting to read       */

        wait_queue_head_t buf_writers;  /* Processes waiting to ctx switch */

#if __REALLY_HAVE_AGP

        drm_agp_head_t    *agp;

#endif

        struct pci_dev *pdev;

#ifdef __alpha__

        struct pci_controller *hose;

#endif