drmp.h

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

	__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 */
	atomic_t	  total_queued;	/* Total queued statistic	    */
	atomic_t	  total_flushed;/* Total flushes statistic	    */
	atomic_t	  total_locks;	/* Total locks statistics	    */
	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 {
				/* 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		    */

	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
	} 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 defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
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;
} drm_agp_head_t;
#endif

typedef struct drm_sigdata {
	int           context;
	drm_hw_lock_t *lock;
} drm_sigdata_t;

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 */
	atomic_t	  total_open;
	atomic_t	  total_close;
	atomic_t	  total_ioctl;
	atomic_t	  total_irq;	/* Total interruptions		   */
	atomic_t	  total_ctx;	/* Total context switches	   */
	
	atomic_t	  total_locks;
	atomic_t	  total_unlocks;
	atomic_t	  total_contends;
	atomic_t	  total_sleeps;

				/* Authentication */
	drm_file_t	  *file_first;
	drm_file_t	  *file_last;
	drm_magic_head_t  magiclist[DRM_HASH_SIZE];

				/* Memory management */
	drm_map_t	  **maplist;	/* Vector of pointers to regions   */
	int		  map_count;	/* Number of mappable regions	   */

	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;
	cycles_t	  ctx_start;
	cycles_t	  lck_start;
#if DRM_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 defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
	drm_agp_head_t    *agp;
#endif
	unsigned long     *ctx_bitmap;
	void		  *dev_private;
	drm_sigdata_t     sigdata; /* For block_all_signals */
	sigset_t          sigmask;
} drm_device_t;


				/* Internal function definitions */

				/* Misc. support (init.c) */
extern int	     drm_flags;
extern void	     drm_parse_options(char *s);
extern int           drm_cpu_valid(void);


				/* Device support (fops.c) */
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_release(struct inode *inode, struct file *filp);
extern int	     drm_fasync(int fd, struct file *filp, int on);
extern ssize_t	     drm_read(struct file *filp, char *buf, size_t count,
			      loff_t *off);
extern int	     drm_write_string(drm_device_t *dev, const char *s);
extern unsigned int  drm_poll(struct file *filp, struct poll_table_struct *wait);

				/* Mapping support (vm.c) */
#if LINUX_VERSION_CODE < 0x020317
extern unsigned long drm_vm_nopage(struct vm_area_struct *vma,
				   unsigned long address,
				   int write_access);
extern unsigned long drm_vm_shm_nopage(struct vm_area_struct *vma,
				       unsigned long address,
				       int write_access);
extern unsigned long drm_vm_shm_nopage_lock(struct vm_area_struct *vma,
					    unsigned long address,
					    int write_access);
extern unsigned long drm_vm_dma_nopage(struct vm_area_struct *vma,
				       unsigned long address,
				       int write_access);
#else
				/* Return type changed in 2.3.23 */
extern struct page *drm_vm_nopage(struct vm_area_struct *vma,
				  unsigned long address,
				  int write_access);
extern struct page *drm_vm_shm_nopage(struct vm_area_struct *vma,
				      unsigned long address,
				      int write_access);
extern struct page *drm_vm_shm_nopage_lock(struct vm_area_struct *vma,
					   unsigned long address,
					   int write_access);
extern struct page *drm_vm_dma_nopage(struct vm_area_struct *vma,
				      unsigned long address,
				      int write_access);
#endif
extern void	     drm_vm_open(struct vm_area_struct *vma);
extern void	     drm_vm_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);


				/* Proc support (proc.c) */
extern int	     drm_proc_init(drm_device_t *dev);
extern int	     drm_proc_cleanup(void);

				/* Memory management support (memory.c) */
extern void	     drm_mem_init(void);
extern int	     drm_mem_info(char *buf, char **start, off_t offset,
				  int len, int *eof, void *data);
extern void	     *drm_alloc(size_t size, int area);
extern void	     *drm_realloc(void *oldpt, size_t oldsize, size_t size,
				  int area);
extern char	     *drm_strdup(const char *s, int area);
extern void	     drm_strfree(const char *s, int area);
extern void	     drm_free(void *pt, 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);
extern void	     drm_ioremapfree(void *pt, unsigned long size);

#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
extern agp_memory    *drm_alloc_agp(int pages, u32 type);
extern int           drm_free_agp(agp_memory *handle, int pages);
extern int           drm_bind_agp(agp_memory *handle, unsigned int start);
extern int           drm_unbind_agp(agp_memory *handle);
#endif


				/* Buffer management support (bufs.c) */
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_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);


				/* Buffer list management support (lists.c) */
extern int	     drm_waitlist_create(drm_waitlist_t *bl, int count);
extern int	     drm_waitlist_destroy(drm_waitlist_t *bl);
extern int	     drm_waitlist_put(drm_waitlist_t *bl, drm_buf_t *buf);
extern drm_buf_t     *drm_waitlist_get(drm_waitlist_t *bl);

extern int	     drm_freelist_create(drm_freelist_t *bl, int count);
extern int	     drm_freelist_destroy(drm_freelist_t *bl);
extern int	     drm_freelist_put(drm_device_t *dev, drm_freelist_t *bl,
				      drm_buf_t *buf);
extern drm_buf_t     *drm_freelist_get(drm_freelist_t *bl, int block);

				/* DMA support (gen_dma.c) */
extern void	     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_reclaim_buffers(drm_device_t *dev, pid_t pid);
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 void	     drm_clear_next_buffer(drm_device_t *dev);
extern int	     drm_select_queue(drm_device_t *dev,
				      void (*wrapper)(unsigned long));
extern int	     drm_dma_enqueue(drm_device_t *dev, drm_dma_t *dma);
extern int	     drm_dma_get_buffers(drm_device_t *dev, drm_dma_t *dma);
#if DRM_DMA_HISTOGRAM
extern int	     drm_histogram_slot(unsigned long count);
extern void	     drm_histogram_compute(drm_device_t *dev, drm_buf_t *buf);
#endif


				/* Misc. IOCTL support (ioctl.c) */
extern int	     drm_irq_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);


				/* Context IOCTL support (context.c) */
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);


				/* Drawable IOCTL support (drawable.c) */
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 (auth.c) */
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);


				/* Locking IOCTL support (lock.c) */
extern int	     drm_block(struct inode *inode, struct file *filp,
			       unsigned int cmd, unsigned long arg);
extern int	     drm_unblock(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_finish(struct inode *inode, struct file *filp,
				unsigned int cmd, unsigned long arg);
extern int	     drm_flush_unblock(drm_device_t *dev, int context,
				       drm_lock_flags_t flags);
extern int	     drm_flush_block_and_flush(drm_device_t *dev, int context,
					       drm_lock_flags_t flags);
extern int           drm_notifier(void *priv);

				/* Context Bitmap support (ctxbitmap.c) */
extern int	     drm_ctxbitmap_init(drm_device_t *dev);
extern void	     drm_ctxbitmap_cleanup(drm_device_t *dev);
extern int	     drm_ctxbitmap_next(drm_device_t *dev);
extern void	     drm_ctxbitmap_free(drm_device_t *dev, int ctx_handle);

#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
				/* AGP/GART support (agpsupport.c) */
extern drm_agp_head_t *drm_agp_init(void);
extern void           drm_agp_uninit(void);
extern int            drm_agp_acquire(struct inode *inode, struct file *filp,
				      unsigned int cmd, unsigned long arg);
extern void           _drm_agp_release(void);
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 agp_memory     *drm_agp_allocate_memory(size_t pages, u32 type);
extern int            drm_agp_free_memory(agp_memory *handle);
extern int            drm_agp_bind_memory(agp_memory *handle, off_t start);
extern int            drm_agp_unbind_memory(agp_memory *handle);
#endif
#endif
#endif