[Intel-gfx] [PATCH v3 2/3] drm/i915: Enable resource streamer bits on MI_BATCH_BUFFER_START

[Abdiel Janulgue]

Adds support for executing the resource streamer on BDW and HSW

v2: Add support for Execlists (Minu Mathai <minu.mathai at intel.com>)

Signed-off-by: Abdiel Janulgue <abdiel.janulgue at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h         | 1 +
 drivers/gpu/drm/i915/intel_lrc.c        | 3 ++-
 drivers/gpu/drm/i915/intel_ringbuffer.c | 6 ++++--
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index b522eb6..238bb25 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -356,6 +356,7 @@
 #define MI_BATCH_BUFFER_START	MI_INSTR(0x31, 0)
 #define   MI_BATCH_GTT		    (2<<6) /* aliased with (1<<7) on gen4 */
 #define MI_BATCH_BUFFER_START_GEN8	MI_INSTR(0x31, 1)
+#define   MI_BATCH_RESOURCE_STREAMER (1<<10)
 
 #define MI_PREDICATE_SRC0	(0x2400)
 #define MI_PREDICATE_SRC1	(0x2408)
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index fcb074b..d523494 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1172,7 +1172,8 @@ static int gen8_emit_bb_start(struct intel_ringbuffer *ringbuf,
 		return ret;
 
 	/* FIXME(BDW): Address space and security selectors. */
-	intel_logical_ring_emit(ringbuf, MI_BATCH_BUFFER_START_GEN8 | (ppgtt<<8));
+	intel_logical_ring_emit(ringbuf, MI_BATCH_BUFFER_START_GEN8 | (ppgtt<<8) |
+				(I915_DISPATCH_RS ? MI_BATCH_RESOURCE_STREAMER : 0));
 	intel_logical_ring_emit(ringbuf, lower_32_bits(offset));
 	intel_logical_ring_emit(ringbuf, upper_32_bits(offset));
 	intel_logical_ring_emit(ringbuf, MI_NOOP);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 441e250..9045144 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2385,7 +2385,8 @@ gen8_ring_dispatch_execbuffer(struct intel_engine_cs *ring,
 		return ret;
 
 	/* FIXME(BDW): Address space and security selectors. */
-	intel_ring_emit(ring, MI_BATCH_BUFFER_START_GEN8 | (ppgtt<<8));
+	intel_ring_emit(ring, MI_BATCH_BUFFER_START_GEN8 | (ppgtt<<8) |
+			(dispatch_flags & I915_DISPATCH_RS ? MI_BATCH_RESOURCE_STREAMER : 0));
 	intel_ring_emit(ring, lower_32_bits(offset));
 	intel_ring_emit(ring, upper_32_bits(offset));
 	intel_ring_emit(ring, MI_NOOP);
@@ -2408,7 +2409,8 @@ hsw_ring_dispatch_execbuffer(struct intel_engine_cs *ring,
 	intel_ring_emit(ring,
 			MI_BATCH_BUFFER_START |
 			(dispatch_flags & I915_DISPATCH_SECURE ?
-			 0 : MI_BATCH_PPGTT_HSW | MI_BATCH_NON_SECURE_HSW));
+			 0 : MI_BATCH_PPGTT_HSW | MI_BATCH_NON_SECURE_HSW) |
+			(dispatch_flags & I915_DISPATCH_RS ? MI_BATCH_RESOURCE_STREAMER : 0));
 	/* bit0-7 is the length on GEN6+ */
 	intel_ring_emit(ring, offset);
 	intel_ring_advance(ring);
-- 
1.9.1