drmp.h

linux-2.6.15.6

	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,
		_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 */
	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;

typedef struct drm_dma_handle {
	dma_addr_t busaddr;
	void *vaddr;
	size_t size;
} drm_dma_handle_t;

/**
 * Mappings list
 */
typedef struct drm_map_list {
	struct list_head head;		/**< list head */
	drm_map_t *map;			/**< mapping */
	unsigned int user_token;
} 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;

/* location of GART table */
#define DRM_ATI_GART_MAIN 1
#define DRM_ATI_GART_FB   2

typedef struct ati_pcigart_info {
	int gart_table_location;
	int is_pcie;
	unsigned long addr;
	dma_addr_t bus_addr;
} drm_ati_pcigart_info;

/**
 * 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);

	/**
	 * Called by \c drm_device_is_agp.  Typically used to determine if a
	 * card is really attached to AGP or not.
	 *
	 * \param dev  DRM device handle
	 *
	 * \returns
	 * One of three values is returned depending on whether or not the
	 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
	 * (return of 1), or may or may not be AGP (return of 2).
	 */
	int (*device_is_agp) (struct drm_device * dev);

	/* 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;

	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__
	struct pci_controller *hose;
#endif
	drm_sg_mem_t *sg;	/**< Scatter gather memory */
	unsigned long *ctx_bitmap;	/**< context bitmap */