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>
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 557f271..c52e209 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
