[Intel-gfx] [PATCH 1/2] drm/i915: flush DC writes cached in l3$ on gen7

[Daniel Vetter]

We don't yet use this, but now that we start to look into putting that
l3$ we better set the associated flush bit, too.

Also add the only other missing PIPE_CONTROL bit #define.

Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/i915_reg.h         |    2 ++
 drivers/gpu/drm/i915/intel_ringbuffer.c |    2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 81a3de6..721a981 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -311,6 +311,8 @@
 #define   PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE		(1<<10) /* GM45+ only */
 #define   PIPE_CONTROL_INDIRECT_STATE_DISABLE		(1<<9)
 #define   PIPE_CONTROL_NOTIFY				(1<<8)
+#define   PIPE_CONTROL_FLUSH_ENABLE			(1<<7) /* gen7+ */
+#define   PIPE_CONTROL_DC_CACHE_FLUSH			(1<<5) /* gen7+ */
 #define   PIPE_CONTROL_VF_CACHE_INVALIDATE		(1<<4)
 #define   PIPE_CONTROL_CONST_CACHE_INVALIDATE		(1<<3)
 #define   PIPE_CONTROL_STATE_CACHE_INVALIDATE		(1<<2)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 58e6b0e..f52778f 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -228,6 +228,8 @@ gen6_render_ring_flush(struct intel_ring_buffer *ring,
 	flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE;
 	flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE;
 	flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE;
+	if (IS_GEN7(ring->dev))
+		flags |= PIPE_CONTROL_DC_CACHE_FLUSH;
 	/*
 	 * Ensure that any following seqno writes only happen when the render
 	 * cache is indeed flushed (but only if the caller actually wants that).
-- 
1.7.10.4