drm/i915: Enable resource streamer bits on MI_BATCH_BUFFER_START

Adds support for enabling the resource streamer on the legacy
ringbuffer for HSW and GEN8.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ac8436f..b932e17 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -361,6 +361,7 @@
 #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_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index e39c891..bddc903 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2448,7 +2448,9 @@ gen8_ring_dispatch_execbuffer(struct drm_i915_gem_request *req,
                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);
@@ -2472,7 +2474,9 @@ hsw_ring_dispatch_execbuffer(struct drm_i915_gem_request *req,
        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);

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 304cac4..0ea89ea 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -199,6 +199,7 @@ struct  intel_engine_cs {
                                               unsigned dispatch_flags);
 #define I915_DISPATCH_SECURE 0x1
 #define I915_DISPATCH_PINNED 0x2
+#define I915_DISPATCH_RS     0x4
        void            (*cleanup)(struct intel_engine_cs *ring);
 
        /* GEN8 signal/wait table - never trust comments!