index : renesas/drm.git	android live master
	libdrm, cloned from git://anongit.freedesktop.org/mesa/drm	Laurent Pinchart

summaryrefslogtreecommitdiff

log msg author committer range

Age	Commit message (Expand)	Author
2008-10-10	[FreeBSD] Rework all of the memory allocations	Robert Noland
2008-10-09	[FreeBSD] Fix linux list compat list_for_each_safe()	Robert Noland
2008-10-09	i915: Cleanup interrupt handling	Robert Noland
2008-10-09	Manage fences in user-mode bufmgr_fake to clean buffers	Keith Packard
2008-10-09	intel: Protect bufmgr objects with a pthread mutex.	Eric Anholt
2008-10-09	intel: fix for write_domain and static BOs.	Xiang, Haihao
2008-10-06	radeon: add comment to clarify bus mastering on PCIE chips	Alex Deucher
2008-10-06	radeon: fix duplicate define in my last commit	Alex Deucher
2008-10-07	radeon: PCIE cards don't appear to have explicit bus master	Dave Airlie
2008-10-07	drm: add create gpu tree script	Dave Airlie
2008-10-06	radeon: fix bus master enabled bits on newer asics	Alex Deucher
2008-10-06	radeon: fix missing bit from rs740 patch	Mihail Zenkov
2008-10-04	radeon: Add support for HD2100 IGP (RS740)	Alex Deucher
2008-10-03	[FreeBSD] Don't explicitly bzero driver softc.	Robert Noland
2008-10-03	[FreeBSD] Use M_WAITOK when allocating driver memory.	Robert Noland
2008-10-03	[FreeBSD] Do a bit of optimization on drm_order()	Robert Noland
2008-10-01	Use devfs_get_cdevpriv in mmap as well.	Robert Noland
2008-09-27	intel: Copy data from card memory back to backing store when mapping.	Xiang, Haihao
2008-09-23	intel: Allow up to 15 seconds chewing on one buffer before acknowledging -EBUSY.	Eric Anholt
2008-09-23	intel: Replace wraparound test logic in bufmgr_fake. Again.	Eric Anholt
2008-09-23	intel: Do strerror on errno, not on the -1 return value from ioctl.	Eric Anholt
2008-09-22	intel: Fix driver-supplied argument to exec function (fd.o bug #17653).	Xiang, Haihao
2008-09-17	[FreeBSD] Convert to using cdevpriv for file_priv tracking	Robert Noland
2008-09-17	nv50: add initial context for chipset 0xaa	Ben Skeggs
2008-09-17	nv50: add initial context to match ctxprog for chipset 0x50	Ben Skeggs
2008-09-17	nv50: add ctxprog for chipset 0x50	Ben Skeggs
2008-09-17	nv50: add ctxprog for chipset 0xaa	Ben Skeggs
2008-09-17	nv50: add support for chipset 0x92	Ben Skeggs
2008-09-10	Remove incomplete and obsolete free/net/open code.	vehemens
2008-09-10	Add missing \ to libdrm_la_SOURCES	Eric Anholt
2008-09-10	intel: don't forget to include config.h in bufmgr code.	Eric Anholt
2008-09-10	intel: move drm calls to exec buffers to libdrm_intel.	Eric Anholt
2008-09-10	intel: Move IRQ emit/wait from callbacks into the bufmgr.	Eric Anholt
2008-09-10	Move intel libdrm stuff to libdrm_intel.so	Eric Anholt
2008-09-10	drm: Add tests for GEM_FLINK ioctl.	Eric Anholt
2008-09-08	[FreeBSD] We need to call drm_detach before we free dev->driver.	Robert Noland
2008-09-07	[FreeBSD] Implement drm_ioremap_wc() to set a range of mem to write-combining	Robert Noland
2008-09-06	[FreeBSD] IGP gart needs to be un-cached.	Robert Noland
2008-09-06	Free temp_pagelist on error. Free in reverse order. Noticed by open.	vehemens
2008-09-06	Pass lock data like linux and open.	vehemens
2008-09-06	Move order to end like linux.	vehemens
2008-09-06	Style white space cleanup part 2.	vehemens
2008-09-06	[FreeBSD] Ensure that drm_pci_alloc is never called while locks are held.	Robert Noland
2008-09-05	Reorder lock functions like linux.	vehemens
2008-09-05	Style white space cleanup.	vehemens
2008-09-05	Need M_NOWAIT for malloc.	vehemens
2008-09-05	i915: fix i915_ring_validate()	Robert Noland
2008-09-05	nouveau: 8200 cards are 0xA0 family.	Stephane Marchesin
2008-09-02	drm: fix sysfs error path.	Dave Airlie
2008-08-31	radeon: make writeback work after suspend/resume.	Dave Airlie

• [next]

generated by cgit v1.2.3 (git 2.25.1) at 2024-09-15 06:00:24 +0000

/**
 * \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_


#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/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
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,41)
#define HAS_WORKQUEUE 0
#else
#define HAS_WORKQUEUE 1
#endif
#if !HAS_WORKQUEUE
#include <linux/tqueue.h>
#else
#include <linux/workqueue.h>
#endif
#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"

/* If you want the memory alloc debug functionality, change define below */
/* #define DEBUG_MEMORY */

/***********************************************************************/
/** \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_FB_DMA      0x20
#define DRIVER_HAVE_DMA    0x40
#define DRIVER_HAVE_IRQ    0x80
#define DRIVER_IRQ_SHARED  0x100
#define DRIVER_IRQ_VBL     0x200
#define DRIVER_DMA_QUEUE   0x400

/*@}*/

/***********************************************************************/
/** \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)
	
/*@}*/


#include "drm_compat.h"


/***********************************************************************/
/** \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(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; }

/*@}*/


/***********************************************************************/
/** \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)

/**
 * 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_device *dev;
	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,
		_DRM_DMA_USE_FB  = 0x04
	} 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 */
	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 device functions structure
 */
struct drm_device;

struct drm_driver_fn {
	int (*preinit)(struct drm_device *, unsigned long flags);
	int (*postinit)(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 *);

	/* these are opposites at the moment */
	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);
	int (*kernel_context_switch_unlock)(struct drm_device *dev);
	int (*vblank_wait)(struct drm_device *dev, unsigned int *sequence);
/* these have to be filled in */
	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);
};

/**
 * DRM device structure.
 */
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		  minor;        /**< Minor device number */
	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 */