Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1073 insertions, 0 deletions

diff --git a/drivers/char/drm/drmP.h b/drivers/char/drm/drmP.h
new file mode 100644
index 000000000000..21f4c54e1a8d
--- /dev/null
+++ b/drivers/char/drm/drmP.h
@@ -0,0 +1,1073 @@
+/**
+ * \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.
+ * 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 you want the memory alloc debug functionality, change define below */
+/* #define DEBUG_MEMORY */
+
+#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/version.h>
+#include <linux/jiffies.h>
+#include <linux/smp_lock.h>     /* For (un)lock_kernel */
+#include <linux/mm.h>
+#include <linux/cdev.h>
+#if defined(__alpha__) || defined(__powerpc__)
+#include <asm/pgtable.h> /* For pte_wrprotect */
+#endif
+#include <asm/io.h>
+#include <asm/mman.h>
+#include <asm/uaccess.h>
+#ifdef CONFIG_MTRR
+#include <asm/mtrr.h>
+#endif
+#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
+#include <linux/types.h>
+#include <linux/agp_backend.h>
+#endif
+#include <linux/workqueue.h>
+#include <linux/poll.h>
+#include <asm/pgalloc.h>
+#include "drm.h"
+
+#define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
+#define __OS_HAS_MTRR (defined(CONFIG_MTRR))
+
+#include "drm_os_linux.h"
+
+/***********************************************************************/
+/** \name DRM template customization defaults */
+/*@{*/
+
+/* driver capabilities and requirements mask */
+#define DRIVER_USE_AGP     0x1
+#define DRIVER_REQUIRE_AGP 0x2
+#define DRIVER_USE_MTRR    0x4
+#define DRIVER_PCI_DMA     0x8
+#define DRIVER_SG          0x10
+#define DRIVER_HAVE_DMA    0x20
+#define DRIVER_HAVE_IRQ    0x40
+#define DRIVER_IRQ_SHARED  0x80
+#define DRIVER_IRQ_VBL     0x100
+#define DRIVER_DMA_QUEUE   0x200
+
+/***********************************************************************/
+/** \name 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. Must be power of 2. */
+#define DRM_KERNEL_CONTEXT    0  /**< Change drm_resctx if changed */
+#define DRM_RESERVED_CONTEXTS 1  /**< Change drm_resctx if changed */
+#define DRM_LOOPING_LIMIT     5000000
+#define DRM_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_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_MEM_CTXLIST  21
+
+#define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
+        
+/*@}*/
+
+
+/***********************************************************************/
+/** \name Backward compatibility section */
+/*@{*/
+
+#ifndef MODULE_LICENSE
+#define MODULE_LICENSE(x) 
+#endif
+
+#ifndef preempt_disable
+#define preempt_disable()
+#define preempt_enable()
+#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)) {
+                        preempt_disable();
+                        ptep = pte_offset_map(pmd, addr);
+                        pte = *ptep;
+                        if (pte_present(pte))
+                                page = pte_page(pte);
+                        pte_unmap(ptep);
+                        preempt_enable();
+                }
+        }
+        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)
+
+/*@}*/
+
+
+/***********************************************************************/
+/** \name Macros to make printk easier */
+/*@{*/
+
+/**
+ * Error output.
+ *
+ * \param fmt printf() like format string.
+ * \param arg arguments
+ */
+#define DRM_ERROR(fmt, arg...) \
+        printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* " fmt , __FUNCTION__ , ##arg)
+
+/**
+ * Memory error output.
+ *
+ * \param area memory area where the error occurred.
+ * \param fmt printf() like format string.
+ * \param arg arguments
+ */
+#define DRM_MEM_ERROR(area, fmt, arg...) \
+        printk(KERN_ERR "[" DRM_NAME ":%s:%s] *ERROR* " fmt , __FUNCTION__, \
+               drm_mem_stats[area].name , ##arg)
+
+#define DRM_INFO(fmt, arg...)  printk(KERN_INFO "[" DRM_NAME "] " fmt , ##arg)
+
+/**
+ * Debug output.
+ * 
+ * \param fmt printf() like format string.
+ * \param arg arguments
+ */
+#if DRM_DEBUG_CODE
+#define DRM_DEBUG(fmt, arg...)                                          \
+        do {                                                            \
+                if ( drm_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; }
+
+/*@}*/
+
+
+/***********************************************************************/
+/** \name 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_IF_VERSION(maj, min) (maj << 16 | min)
+/**
+ * Get the private SAREA mapping.
+ *
+ * \param _dev DRM device.
+ * \param _ctx context number.
+ * \param _map output mapping.
+ */
+#define DRM_GET_PRIV_SAREA(_dev, _ctx, _map) do {       \
+        (_map) = (_dev)->context_sareas[_ctx];          \
+} while(0)
+
+/**
+ * Test that the hardware lock is held by the caller, returning otherwise.
+ *
+ * \param dev DRM device.
+ * \param filp file pointer of the caller.
+ */
+#define LOCK_TEST_WITH_RETURN( dev, filp )                              \
+do {                                                                    \
+        if ( !_DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ) ||           \
+             dev->lock.filp != filp ) {                         \
+                DRM_ERROR( "%s called without lock held\n",             \
+                           __FUNCTION__ );                              \
+                return -EINVAL;                                         \
+        }                                                               \
+} while (0)
+
+/**
+ * Copy and IOCTL return string to user space
+ */
+#define DRM_COPY( name, value )                                         \
+        len = strlen( value );                                          \
+        if ( len > name##_len ) len = name##_len;                       \
+        name##_len = strlen( value );                                   \
+        if ( len && name ) {                                            \
+                if ( copy_to_user( name, value, len ) )                 \
+                        return -EFAULT;                                 \
+        }
+        
+/**
+ * Ioctl function type.
+ *
+ * \param inode device inode.
+ * \param filp file pointer.
+ * \param cmd command.
+ * \param arg argument.
+ */
+typedef int drm_ioctl_t( struct inode *inode, struct file *filp,
+                         unsigned int cmd, unsigned long arg );
+
+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;
+
+/**
+ * DMA buffer.
+ */
+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 */
+        struct file       *filp;       /**< Pointer to 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 */
+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;
+
+/**
+ * Buffer entry.  There is one of this for each buffer size order.
+ */
+typedef struct drm_buf_entry {
+        int               buf_size;     /**< size */
+        int               buf_count;    /**< number of buffers */
+        drm_buf_t         *buflist;     /**< buffer list */
+        int               seg_count;
+        int               page_order;
+        unsigned long     *seglist;
+
+        drm_freelist_t    freelist;
+} drm_buf_entry_t;
+
+/** File private data */
+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_head   *head;
+        int               remove_auth_on_close;
+        unsigned long     lock_count;
+        void              *driver_priv;
+} drm_file_t;
+
+/** Wait queue */
+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;
+
+/**
+ * Lock data.
+ */
+typedef struct drm_lock_data {
+        drm_hw_lock_t     *hw_lock;     /**< Hardware lock */
+        struct file       *filp;        /**< File descr 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;
+
+/**
+ * DMA data.
+ */
+typedef struct drm_device_dma {
+
+        drm_buf_entry_t   bufs[DRM_MAX_ORDER+1];        /**< buffers, grouped by their size order */
+        int               buf_count;    /**< total number of buffers */
+        drm_buf_t         **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
+        } flags;
+
+} drm_device_dma_t;
+
+/** 
+ * AGP memory entry.  Stored as a doubly linked list.
+ */
+typedef struct drm_agp_mem {
+        unsigned long      handle;      /**< handle */
+        DRM_AGP_MEM        *memory;     
+        unsigned long      bound;       /**< address */
+        int                pages;
+        struct drm_agp_mem *prev;       /**< previous entry */
+        struct drm_agp_mem *next;       /**< next entry */
+} drm_agp_mem_t;
+
+/**
+ * AGP data.
+ *
+ * \sa drm_agp_init() and drm_device::agp.
+ */
+typedef struct drm_agp_head {
+        DRM_AGP_KERN       agp_info;    /**< AGP device information */
+        drm_agp_mem_t      *memory;     /**< memory entries */
+        unsigned long      mode;        /**< AGP mode */
+        struct agp_bridge_data  *bridge;
+        int                enabled;     /**< whether the AGP bus as been enabled */
+        int                acquired;    /**< whether the AGP device has been acquired */
+        unsigned long      base;
+        int                agp_mtrr;
+        int                cant_use_aperture;
+        unsigned long      page_mask;
+} drm_agp_head_t;
+
+/**
+ * Scatter-gather memory.
+ */
+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;
+
+/**
+ * Mappings list
+ */
+typedef struct drm_map_list {
+        struct list_head        head;   /**< list head */
+        drm_map_t               *map;   /**< mapping */
+} drm_map_list_t;
+
+typedef drm_map_t drm_local_map_t;
+
+/**
+ * Context handle list
+ */
+typedef struct drm_ctx_list {
+        struct list_head        head;   /**< list head */
+        drm_context_t           handle; /**< context handle */
+        drm_file_t              *tag;   /**< associated fd private data */
+} drm_ctx_list_t;
+
+
+typedef struct drm_vbl_sig {
+        struct list_head        head;
+        unsigned int            sequence;
+        struct siginfo          info;
+        struct task_struct      *task;
+} drm_vbl_sig_t;
+
+
+/**
+ * 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_device;
+
+struct drm_driver {
+        int (*preinit)(struct drm_device *, unsigned long flags);
+        void (*prerelease)(struct drm_device *, struct file *filp);
+        void (*pretakedown)(struct drm_device *);
+        int (*postcleanup)(struct drm_device *);
+        int (*presetup)(struct drm_device *);
+        int (*postsetup)(struct drm_device *);
+        int (*dma_ioctl)( DRM_IOCTL_ARGS );
+        int (*open_helper)(struct drm_device *, drm_file_t *);
+        void (*free_filp_priv)(struct drm_device *, drm_file_t *);
+        void (*release)(struct drm_device *, struct file *filp);
+        void (*dma_ready)(struct drm_device *);
+        int (*dma_quiescent)(struct drm_device *);
+        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);
+        void (*kernel_context_switch_unlock)(struct drm_device *dev, drm_lock_t *lock);
+        int (*vblank_wait)(struct drm_device *dev, unsigned int *sequence);
+        /* these have to be filled in */
+        int (*postinit)(struct drm_device *, unsigned long flags);
+        irqreturn_t (*irq_handler)( DRM_IRQ_ARGS );
+        void (*irq_preinstall)(struct drm_device *dev);
+        void (*irq_postinstall)(struct drm_device *dev);
+        void (*irq_uninstall)(struct drm_device *dev);
+        void (*reclaim_buffers)(struct drm_device *dev, struct file *filp);
+        unsigned long (*get_map_ofs)(drm_map_t *map);
+        unsigned long (*get_reg_ofs)(struct drm_device *dev);
+        void (*set_version)(struct drm_device *dev, drm_set_version_t *sv);
+        int (*version)(drm_version_t *version);
+        u32 driver_features;
+        int dev_priv_size;
+        drm_ioctl_desc_t *ioctls;
+        int num_ioctls;
+        struct file_operations fops;
+        struct pci_driver pci_driver;
+};
+
+/**
+ * DRM head structure. This structure represent a video head on a card
+ * that may contain multiple heads. Embed one per head of these in the
+ * private drm_device structure.
+ */
+typedef struct drm_head {
+        int minor;                      /**< Minor device number */
+        struct drm_device *dev;
+        struct proc_dir_entry *dev_root;  /**< proc directory entry */
+        dev_t device;                   /**< Device number for mknod */
+        struct class_device *dev_class;
+} drm_head_t;
+
+/**
+ * DRM device structure. This structure represent a complete card that
+ * may contain multiple heads.
+ */
+typedef struct drm_device {
+        char              *unique;      /**< Unique identifier: e.g., busid */
+        int               unique_len;   /**< Length of unique field */
+        char              *devname;     /**< For /proc/interrupts */
+        int               if_version;   /**< Highest interface version set */
+
+        int               blocked;      /**< Blocked due to VC switch? */
+
+        /** \name Locks */
+        /*@{*/
+        spinlock_t        count_lock;   /**< For inuse, drm_device::open_count, drm_device::buf_use */
+        struct semaphore  struct_sem;   /**< For others */
+        /*@}*/
+
+        /** \name Usage Counters */
+        /*@{*/
+        int               open_count;   /**< Outstanding files open */
+        atomic_t          ioctl_count;  /**< Outstanding IOCTLs pending */
+        atomic_t          vma_count;    /**< Outstanding vma areas open */
+        int               buf_use;      /**< Buffers in use -- cannot alloc */
+        atomic_t          buf_alloc;    /**< Buffer allocation in progress */
+        /*@}*/
+
+        /** \name Performance counters */
+        /*@{*/
+        unsigned long     counters;
+        drm_stat_type_t   types[15];
+        atomic_t          counts[15];
+        /*@}*/
+
+        /** \name Authentication */
+        /*@{*/
+        drm_file_t        *file_first;  /**< file list head */
+        drm_file_t        *file_last;   /**< file list tail */
+        drm_magic_head_t  magiclist[DRM_HASH_SIZE];     /**< magic hash table */
+        /*@}*/
+
+        /** \name Memory management */
+        /*@{*/
+        drm_map_list_t    *maplist;     /**< Linked list of regions */
+        int               map_count;    /**< Number of mappable regions */
+
+        /** \name Context handle management */
+        /*@{*/
+        drm_ctx_list_t    *ctxlist;     /**< Linked list of context handles */
+        int               ctx_count;    /**< Number of context handles */
+        struct semaphore  ctxlist_sem;  /**< For ctxlist */
+
+        drm_map_t         **context_sareas; /**< per-context SAREA's */
+        int               max_context;
+
+        drm_vma_entry_t   *vmalist;     /**< List of vmas (for debugging) */
+        drm_lock_data_t   lock;         /**< Information on hardware lock */
+        /*@}*/
+
+        /** \name DMA queues (contexts) */
+        /*@{*/
+        int               queue_count;  /**< Number of active DMA queues */
+        int               queue_reserved; /**< Number of reserved DMA queues */
+        int               queue_slots;  /**< Actual length of queuelist */
+        drm_queue_t       **queuelist;  /**< Vector of pointers to DMA queues */
+        drm_device_dma_t  *dma;         /**< Optional pointer for DMA support */
+        /*@}*/
+
+        /** \name Context support */
+        /*@{*/
+        int               irq;          /**< Interrupt used by board */
+        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 */
+        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 work_struct      work;
+        /** \name VBLANK IRQ support */
+        /*@{*/
+
+        wait_queue_head_t vbl_queue;    /**< VBLANK wait queue */
+        atomic_t          vbl_received;
+        spinlock_t        vbl_lock;
+        drm_vbl_sig_t     vbl_sigs;     /**< signal list to send on VBLANK */
+        unsigned int      vbl_pending;
+
+        /*@}*/
+        cycles_t          ctx_start;
+        cycles_t          lck_start;
+
+        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 */
+
+        drm_agp_head_t    *agp; /**< AGP data */
+
+        struct pci_dev    *pdev;        /**< PCI device structure */
+        int               pci_domain;   /**< PCI bus domain number */
+        int               pci_bus;      /**< PCI bus number */
+        int               pci_slot;     /**< PCI slot number */
+        int               pci_func;     /**< PCI function number */
+#ifdef __alpha__
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,3)
+        struct pci_controler *hose;
+#else
+        struct pci_controller *hose;
+#endif
+#endif
+        drm_sg_mem_t      *sg;  /**< Scatter gather memory */
+        unsigned long     *ctx_bitmap;  /**< context bitmap */
+        void              *dev_private; /**< device private data */
+        drm_sigdata_t     sigdata; /**< For block_all_signals */
+        sigset_t          sigmask;
+
+        struct            drm_driver *driver;
+        drm_local_map_t   *agp_buffer_map;
+        drm_head_t primary;             /**< primary screen head */
+} drm_device_t;
+
+static __inline__ int drm_core_check_feature(struct drm_device *dev, int feature)
+{
+        return ((dev->driver->driver_features & feature) ? 1 : 0);
+}
+
+#if __OS_HAS_AGP
+static inline int drm_core_has_AGP(struct drm_device *dev)
+{
+  return drm_core_check_feature(dev, DRIVER_USE_AGP);
+}
+#else
+#define drm_core_has_AGP(dev) (0)
+#endif
+
+#if __OS_HAS_MTRR
+static inline int drm_core_has_MTRR(struct drm_device *dev)
+{
+  return drm_core_check_feature(dev, DRIVER_USE_MTRR);
+}
+#else
+#define drm_core_has_MTRR(dev) (0)
+#endif
+
+/******************************************************************/
+/** \name Internal function definitions */
+/*@{*/
+
+                                /* Misc. support (drm_init.h) */
+extern int           drm_flags;
+extern void          drm_parse_options( char *s );
+extern int           drm_cpu_valid( void );
+
+                                /* Driver support (drm_drv.h) */
+extern int           drm_init(struct drm_driver *driver);
+extern void          drm_exit(struct drm_driver *driver);
+extern int           drm_version(struct inode *inode, struct file *filp,
+                                  unsigned int cmd, unsigned long arg);
+extern int           drm_ioctl(struct inode *inode, struct file *filp,
+                                unsigned int cmd, unsigned long arg);
+extern int           drm_takedown(drm_device_t * dev);
+
+                                /* Device support (drm_fops.h) */
+extern int           drm_open(struct inode *inode, struct file *filp);
+extern int           drm_stub_open(struct inode *inode, struct file *filp);
+extern int           drm_open_helper(struct inode *inode, struct file *filp,
+                                      drm_device_t *dev);
+extern int           drm_flush(struct file *filp);
+extern int           drm_fasync(int fd, struct file *filp, int on);
+extern int           drm_release(struct inode *inode, struct file *filp);
+
+                                /* Mapping support (drm_vm.h) */
+extern void          drm_vm_open(struct vm_area_struct *vma);
+extern void          drm_vm_close(struct vm_area_struct *vma);
+extern void          drm_vm_shm_close(struct vm_area_struct *vma);
+extern int           drm_mmap_dma(struct file *filp,
+                                   struct vm_area_struct *vma);
+extern int           drm_mmap(struct file *filp, struct vm_area_struct *vma);
+extern unsigned int  drm_poll(struct file *filp, struct poll_table_struct *wait);
+extern ssize_t       drm_read(struct file *filp, char __user *buf, size_t count, loff_t *off);
+
+                                /* Memory management support (drm_memory.h) */
+#include "drm_memory.h"
+extern void          drm_mem_init(void);
+extern int           drm_mem_info(char *buf, char **start, off_t offset,
+                                   int request, int *eof, void *data);
+extern void          *drm_calloc(size_t nmemb, size_t size, int area);
+extern void          *drm_realloc(void *oldpt, size_t oldsize, size_t size,
+                                   int area);
+extern unsigned long drm_alloc_pages(int order, int area);
+extern void          drm_free_pages(unsigned long address, int order,
+                                     int area);
+extern void          *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t *dev);
+extern void          *drm_ioremap_nocache(unsigned long offset, unsigned long size,
+                                           drm_device_t *dev);
+extern void          drm_ioremapfree(void *pt, unsigned long size, drm_device_t *dev);
+
+extern DRM_AGP_MEM   *drm_alloc_agp(struct agp_bridge_data *bridge, int pages, u32 type);
+extern int           drm_free_agp(DRM_AGP_MEM *handle, int pages);
+extern int           drm_bind_agp(DRM_AGP_MEM *handle, unsigned int start);
+extern int           drm_unbind_agp(DRM_AGP_MEM *handle);
+
+                                /* Misc. IOCTL support (drm_ioctl.h) */
+extern int           drm_irq_by_busid(struct inode *inode, struct file *filp,
+                                       unsigned int cmd, unsigned long arg);
+extern int           drm_getunique(struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg);
+extern int           drm_setunique(struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg);
+extern int           drm_getmap(struct inode *inode, struct file *filp,
+                                 unsigned int cmd, unsigned long arg);
+extern int           drm_getclient(struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg);
+extern int           drm_getstats(struct inode *inode, struct file *filp,
+                                   unsigned int cmd, unsigned long arg);
+extern int           drm_setversion(struct inode *inode, struct file *filp,
+                                     unsigned int cmd, unsigned long arg);
+
+                                /* Context IOCTL support (drm_context.h) */
+extern int           drm_resctx( struct inode *inode, struct file *filp,
+                                  unsigned int cmd, unsigned long arg );
+extern int           drm_addctx( struct inode *inode, struct file *filp,
+                                  unsigned int cmd, unsigned long arg );
+extern int           drm_modctx( struct inode *inode, struct file *filp,
+                                  unsigned int cmd, unsigned long arg );
+extern int           drm_getctx( struct inode *inode, struct file *filp,
+                                  unsigned int cmd, unsigned long arg );
+extern int           drm_switchctx( struct inode *inode, struct file *filp,
+                                     unsigned int cmd, unsigned long arg );
+extern int           drm_newctx( struct inode *inode, struct file *filp,
+                                  unsigned int cmd, unsigned long arg );
+extern int           drm_rmctx( struct inode *inode, struct file *filp,
+                                 unsigned int cmd, unsigned long arg );
+
+extern int           drm_context_switch(drm_device_t *dev, int old, int new);
+extern int           drm_context_switch_complete(drm_device_t *dev, int new);
+
+extern int           drm_ctxbitmap_init( drm_device_t *dev );
+extern void          drm_ctxbitmap_cleanup( drm_device_t *dev );
+extern void          drm_ctxbitmap_free( drm_device_t *dev, int ctx_handle );
+
+extern int           drm_setsareactx( struct inode *inode, struct file *filp,
+                                       unsigned int cmd, unsigned long arg );
+extern int           drm_getsareactx( struct inode *inode, struct file *filp,
+                                       unsigned int cmd, unsigned long arg );
+
+                                /* Drawable IOCTL support (drm_drawable.h) */
+extern int           drm_adddraw(struct inode *inode, struct file *filp,
+                                  unsigned int cmd, unsigned long arg);
+extern int           drm_rmdraw(struct inode *inode, struct file *filp,
+                                 unsigned int cmd, unsigned long arg);
+
+
+                                /* Authentication IOCTL support (drm_auth.h) */
+extern int           drm_add_magic(drm_device_t *dev, drm_file_t *priv,
+                                    drm_magic_t magic);
+extern int           drm_remove_magic(drm_device_t *dev, drm_magic_t magic);
+extern int           drm_getmagic(struct inode *inode, struct file *filp,
+                                   unsigned int cmd, unsigned long arg);
+extern int           drm_authmagic(struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg);
+
+                                /* Placeholder for ioctls past */
+extern int           drm_noop(struct inode *inode, struct file *filp,
+                                  unsigned int cmd, unsigned long arg);
+
+                                /* Locking IOCTL support (drm_lock.h) */
+extern int           drm_lock(struct inode *inode, struct file *filp,
+                               unsigned int cmd, unsigned long arg);
+extern int           drm_unlock(struct inode *inode, struct file *filp,
+                                 unsigned int cmd, unsigned long arg);
+extern int           drm_lock_take(__volatile__ unsigned int *lock,
+                                    unsigned int context);
+extern int           drm_lock_transfer(drm_device_t *dev,
+                                        __volatile__ unsigned int *lock,
+                                        unsigned int context);
+extern int           drm_lock_free(drm_device_t *dev,
+                                    __volatile__ unsigned int *lock,
+                                    unsigned int context);
+extern int           drm_notifier(void *priv);
+
+                                /* Buffer management support (drm_bufs.h) */
+extern int           drm_order( unsigned long size );
+extern int           drm_addmap( struct inode *inode, struct file *filp,
+                                  unsigned int cmd, unsigned long arg );
+extern int           drm_rmmap( struct inode *inode, struct file *filp,
+                                 unsigned int cmd, unsigned long arg );
+extern int           drm_addbufs( struct inode *inode, struct file *filp,
+                                   unsigned int cmd, unsigned long arg );
+extern int           drm_infobufs( struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg );
+extern int           drm_markbufs( struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg );
+extern int           drm_freebufs( struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg );
+extern int           drm_mapbufs( struct inode *inode, struct file *filp,
+                                   unsigned int cmd, unsigned long arg );
+
+                                /* DMA support (drm_dma.h) */
+extern int           drm_dma_setup(drm_device_t *dev);
+extern void          drm_dma_takedown(drm_device_t *dev);
+extern void          drm_free_buffer(drm_device_t *dev, drm_buf_t *buf);
+extern void          drm_core_reclaim_buffers(drm_device_t *dev, struct file *filp);
+
+                                /* IRQ support (drm_irq.h) */
+extern int           drm_control( struct inode *inode, struct file *filp,
+                                   unsigned int cmd, unsigned long arg );
+extern int           drm_irq_install( drm_device_t *dev );
+extern int           drm_irq_uninstall( drm_device_t *dev );
+extern irqreturn_t   drm_irq_handler( DRM_IRQ_ARGS );
+extern void          drm_driver_irq_preinstall( drm_device_t *dev );
+extern void          drm_driver_irq_postinstall( drm_device_t *dev );
+extern void          drm_driver_irq_uninstall( drm_device_t *dev );
+
+extern int           drm_wait_vblank(struct inode *inode, struct file *filp,
+                                      unsigned int cmd, unsigned long arg);
+extern int           drm_vblank_wait(drm_device_t *dev, unsigned int *vbl_seq);
+extern void          drm_vbl_send_signals( drm_device_t *dev );
+
+                                /* AGP/GART support (drm_agpsupport.h) */
+extern drm_agp_head_t *drm_agp_init(drm_device_t *dev);
+extern int            drm_agp_acquire(struct inode *inode, struct file *filp,
+                                       unsigned int cmd, unsigned long arg);
+extern void           drm_agp_do_release(drm_device_t *dev);
+extern int            drm_agp_release(struct inode *inode, struct file *filp,
+                                       unsigned int cmd, unsigned long arg);
+extern int            drm_agp_enable(struct inode *inode, struct file *filp,
+                                      unsigned int cmd, unsigned long arg);
+extern int            drm_agp_info(struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg);
+extern int            drm_agp_alloc(struct inode *inode, struct file *filp,
+                                     unsigned int cmd, unsigned long arg);
+extern int            drm_agp_free(struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg);
+extern int            drm_agp_unbind(struct inode *inode, struct file *filp,
+                                      unsigned int cmd, unsigned long arg);
+extern int            drm_agp_bind(struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg);
+extern DRM_AGP_MEM    *drm_agp_allocate_memory(struct agp_bridge_data *bridge, size_t pages, u32 type);
+extern int            drm_agp_free_memory(DRM_AGP_MEM *handle);
+extern int            drm_agp_bind_memory(DRM_AGP_MEM *handle, off_t start);
+extern int            drm_agp_unbind_memory(DRM_AGP_MEM *handle);
+
+                                /* Stub support (drm_stub.h) */
+extern int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
+                     struct drm_driver *driver);
+extern int drm_put_dev(drm_device_t * dev);
+extern int drm_get_head(drm_device_t * dev, drm_head_t *head);
+extern int drm_put_head(drm_head_t * head);
+extern unsigned int   drm_debug;
+extern unsigned int   drm_cards_limit;
+extern drm_head_t **drm_heads;
+extern struct drm_sysfs_class *drm_class;
+extern struct proc_dir_entry *drm_proc_root;
+
+                                /* Proc support (drm_proc.h) */
+extern int            drm_proc_init(drm_device_t *dev,
+                                             int minor,
+                                             struct proc_dir_entry *root,
+                                             struct proc_dir_entry **dev_root);
+extern int            drm_proc_cleanup(int minor,
+                                        struct proc_dir_entry *root,
+                                        struct proc_dir_entry *dev_root);
+
+                                /* Scatter Gather Support (drm_scatter.h) */
+extern void           drm_sg_cleanup(drm_sg_mem_t *entry);
+extern int            drm_sg_alloc(struct inode *inode, struct file *filp,
+                                    unsigned int cmd, unsigned long arg);
+extern int            drm_sg_free(struct inode *inode, struct file *filp,
+                                   unsigned int cmd, unsigned long arg);
+
+                               /* ATI PCIGART support (ati_pcigart.h) */
+extern int            drm_ati_pcigart_init(drm_device_t *dev,
+                                            unsigned long *addr,
+                                            dma_addr_t *bus_addr);
+extern int            drm_ati_pcigart_cleanup(drm_device_t *dev,
+                                               unsigned long addr,
+                                               dma_addr_t bus_addr);
+
+extern void *drm_pci_alloc(drm_device_t * dev, size_t size,
+                           size_t align, dma_addr_t maxaddr,
+                           dma_addr_t * busaddr);
+
+extern void drm_pci_free(drm_device_t * dev, size_t size,
+                         void *vaddr, dma_addr_t busaddr);
+
+                               /* sysfs support (drm_sysfs.c) */
+struct drm_sysfs_class;
+extern struct drm_sysfs_class *drm_sysfs_create(struct module *owner,
+                                                char *name);
+extern void drm_sysfs_destroy(struct drm_sysfs_class *cs);
+extern struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs,
+                                                 dev_t dev,
+                                                 struct device *device,
+                                                 const char *fmt, ...);
+extern void drm_sysfs_device_remove(dev_t dev);
+
+
+/* Inline replacements for DRM_IOREMAP macros */
+static __inline__ void drm_core_ioremap(struct drm_map *map, struct drm_device *dev)
+{
+        map->handle = drm_ioremap( map->offset, map->size, dev );
+}
+
+static __inline__ void drm_core_ioremap_nocache(struct drm_map *map, struct drm_device *dev)
+{
+        map->handle = drm_ioremap_nocache(map->offset, map->size, dev);
+}
+
+static __inline__ void drm_core_ioremapfree(struct drm_map *map, struct drm_device *dev)
+{
+        if ( map->handle && map->size )
+                drm_ioremapfree( map->handle, map->size, dev );
+}
+
+static __inline__ struct drm_map *drm_core_findmap(struct drm_device *dev, unsigned long offset)
+{
+        struct list_head *_list;
+        list_for_each( _list, &dev->maplist->head ) {
+                drm_map_list_t *_entry = list_entry( _list, drm_map_list_t, head );
+                if ( _entry->map &&
+                     _entry->map->offset == offset ) {
+                        return _entry->map;
+                }
+        }
+        return NULL;
+}
+
+static __inline__ void drm_core_dropmap(struct drm_map *map)
+{
+}
+
+#ifndef DEBUG_MEMORY
+/** Wrapper around kmalloc() */
+static __inline__ void *drm_alloc(size_t size, int area)
+{
+        return kmalloc(size, GFP_KERNEL);
+}
+
+/** Wrapper around kfree() */
+static __inline__ void drm_free(void *pt, size_t size, int area)
+{
+        kfree(pt);
+}
+#else
+extern void *drm_alloc(size_t size, int area);
+extern void drm_free(void *pt, size_t size, int area);
+#endif
+
+/*@}*/
+
+extern unsigned long drm_core_get_map_ofs(drm_map_t *map);
+extern unsigned long drm_core_get_reg_ofs(struct drm_device *dev);
+
+#endif /* __KERNEL__ */
+#endif