drm/i915: Enable SandyBridge blitter ring

Based on an original patch by Zhenyu Wang, this initializes the BLT ring for
SandyBridge and enables support for user execbuffers.

Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 557f27134d0..c52e209321c 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -263,6 +263,7 @@
 #define RENDER_RING_BASE        0x02000
 #define BSD_RING_BASE           0x04000
 #define GEN6_BSD_RING_BASE      0x12000
+#define BLT_RING_BASE           0x22000
 #define RING_TAIL(base)         ((base)+0x30)
 #define RING_HEAD(base)         ((base)+0x34)
 #define RING_START(base)        ((base)+0x38)
@@ -2561,6 +2562,7 @@
 #define GT_USER_INTERRUPT       (1 << 0)
 #define GT_BSD_USER_INTERRUPT   (1 << 5)
 #define GT_GEN6_BSD_USER_INTERRUPT      (1 << 12)
+#define GT_BLT_USER_INTERRUPT   (1 << 22)
 
 #define GTISR   0x44010
 #define GTIMR   0x44014