diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index e7b9a6aac955..d66208c2c48b 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -1,6 +1,17 @@ #ifndef _INTEL_RINGBUFFER_H_ #define _INTEL_RINGBUFFER_H_ +/* + * Gen2 BSpec "1. Programming Environment" / 1.4.4.6 "Ring Buffer Use" + * Gen3 BSpec "vol1c Memory Interface Functions" / 2.3.4.5 "Ring Buffer Use" + * Gen4+ BSpec "vol1c Memory Interface and Command Stream" / 5.3.4.5 "Ring Buffer Use" + * + * "If the Ring Buffer Head Pointer and the Tail Pointer are on the same + * cacheline, the Head Pointer must not be greater than the Tail + * Pointer." + */ +#define I915_RING_FREE_SPACE 64 + struct intel_hw_status_page { u32 *page_addr; unsigned int gfx_addr; @@ -85,6 +96,7 @@ struct intel_ring_buffer { u32 offset, u32 length, unsigned flags); #define I915_DISPATCH_SECURE 0x1 +#define I915_DISPATCH_PINNED 0x2 void (*cleanup)(struct intel_ring_buffer *ring); int (*sync_to)(struct intel_ring_buffer *ring, struct intel_ring_buffer *to, |