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struct intel_ringbuffer {

struct intel_ringbuffer {

	struct drm_i915_gem_object *obj;

	struct drm_i915_gem_object *obj;

	void __iomem *virtual_start;

	void __iomem *virtual_start;

	struct intel_engine_cs *ring;

	struct list_head link;

	u32 head;

	u32 head;

	u32 tail;

	u32 tail;

#define I915_NUM_RINGS 5

#define I915_NUM_RINGS 5

#define LAST_USER_RING (VECS + 1)

#define LAST_USER_RING (VECS + 1)

	u32		mmio_base;

	u32		mmio_base;

	struct		drm_device *dev;

	struct		drm_device *dev;

	struct intel_ringbuffer *buffer;

	struct intel_ringbuffer *buffer;

	/*

	/*

	 * A pool of objects to use as shadow copies of client batch buffers

	 * A pool of objects to use as shadow copies of client batch buffers

	 * when the command parser is enabled. Prevents the client from

	 * when the command parser is enabled. Prevents the client from

		union {

		union {

			struct {

			struct {

				/* our mbox written by others */

				/* our mbox written by others */

				u32		wait[I915_NUM_RINGS];

				u32		wait[I915_NUM_RINGS];

				/* mboxes this ring signals to */

				/* mboxes this ring signals to */

			} mbox;

			} mbox;

			u64		signal_ggtt[I915_NUM_RINGS];

			u64		signal_ggtt[I915_NUM_RINGS];

		};

		};

	 * to encode the command length in the header).

	 * to encode the command length in the header).

	 */

	 */

	u32 (*get_cmd_length_mask)(u32 cmd_header);

	u32 (*get_cmd_length_mask)(u32 cmd_header);

};

};

bool intel_ring_initialized(struct intel_engine_cs *ring);

}

static inline unsigned

static inline unsigned

intel_ring_flag(struct intel_engine_cs *ring)

intel_ring_flag(struct intel_engine_cs *ring)

{

{

	struct intel_ringbuffer *ringbuf = ring->buffer;

	struct intel_ringbuffer *ringbuf = ring->buffer;

	iowrite32(data, ringbuf->virtual_start + ringbuf->tail);

	iowrite32(data, ringbuf->virtual_start + ringbuf->tail);

	ringbuf->tail += 4;

	ringbuf->tail += 4;

}

}

static inline void intel_ring_advance(struct intel_engine_cs *ring)

static inline void intel_ring_advance(struct intel_engine_cs *ring)

{

{

	struct intel_ringbuffer *ringbuf = ring->buffer;

	struct intel_ringbuffer *ringbuf = ring->buffer;

	ringbuf->tail &= ringbuf->size - 1;

	ringbuf->tail &= ringbuf->size - 1;

}

}