drm/i915: Make the cmd parser 64bit regs explicit

Add defines for the upper halves of the registers used by the cmd
parser. Getting rid of the arithmetic with the register offset
will help in making registers type safe.

v2: s/_HI/_UDW/ (Chris)
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1446839080-18732-1-git-send-email-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/i915_cmd_parser.c

@@ -413,8 +413,8 @@ struct drm_i915_reg_descriptor {
 };
 
 /* Convenience macro for adding 32-bit registers. */
-#define REG32(address, ...)                             \
-	{ .addr = address, __VA_ARGS__ }
+#define REG32(_reg, ...) \
+	{ .addr = (_reg), __VA_ARGS__ }
 
 /*
  * Convenience macro for adding 64-bit registers.
@@ -423,8 +423,13 @@ struct drm_i915_reg_descriptor {
  * access commands only allow 32-bit accesses. Hence, we have to include
  * entries for both halves of the 64-bit registers.
  */
-#define REG64(addr)                                     \
-	REG32(addr), REG32(addr + sizeof(u32))
+#define REG64(_reg) \
+	{ .addr = _reg }, \
+	{ .addr = _reg ## _UDW }
+
+#define REG64_IDX(_reg, idx) \
+	{ .addr = _reg(idx) }, \
+	{ .addr = _reg ## _UDW(idx) }
 
 static const struct drm_i915_reg_descriptor gen7_render_regs[] = {
 	REG64(GPGPU_THREADS_DISPATCHED),
@@ -451,14 +456,14 @@ static const struct drm_i915_reg_descriptor gen7_render_regs[] = {
 	REG32(GEN7_GPGPU_DISPATCHDIMX),
 	REG32(GEN7_GPGPU_DISPATCHDIMY),
 	REG32(GEN7_GPGPU_DISPATCHDIMZ),
-	REG64(GEN7_SO_NUM_PRIMS_WRITTEN(0)),
-	REG64(GEN7_SO_NUM_PRIMS_WRITTEN(1)),
-	REG64(GEN7_SO_NUM_PRIMS_WRITTEN(2)),
-	REG64(GEN7_SO_NUM_PRIMS_WRITTEN(3)),
-	REG64(GEN7_SO_PRIM_STORAGE_NEEDED(0)),
-	REG64(GEN7_SO_PRIM_STORAGE_NEEDED(1)),
-	REG64(GEN7_SO_PRIM_STORAGE_NEEDED(2)),
-	REG64(GEN7_SO_PRIM_STORAGE_NEEDED(3)),
+	REG64_IDX(GEN7_SO_NUM_PRIMS_WRITTEN, 0),
+	REG64_IDX(GEN7_SO_NUM_PRIMS_WRITTEN, 1),
+	REG64_IDX(GEN7_SO_NUM_PRIMS_WRITTEN, 2),
+	REG64_IDX(GEN7_SO_NUM_PRIMS_WRITTEN, 3),
+	REG64_IDX(GEN7_SO_PRIM_STORAGE_NEEDED, 0),
+	REG64_IDX(GEN7_SO_PRIM_STORAGE_NEEDED, 1),
+	REG64_IDX(GEN7_SO_PRIM_STORAGE_NEEDED, 2),
+	REG64_IDX(GEN7_SO_PRIM_STORAGE_NEEDED, 3),
 	REG32(GEN7_SO_WRITE_OFFSET(0)),
 	REG32(GEN7_SO_WRITE_OFFSET(1)),
 	REG32(GEN7_SO_WRITE_OFFSET(2)),

drivers/gpu/drm/i915/i915_reg.h

@@ -378,7 +378,9 @@
 #define   MI_BATCH_RESOURCE_STREAMER (1<<10)
 
 #define MI_PREDICATE_SRC0	(0x2400)
+#define MI_PREDICATE_SRC0_UDW	(0x2400 + 4)
 #define MI_PREDICATE_SRC1	(0x2408)
+#define MI_PREDICATE_SRC1_UDW	(0x2408 + 4)
 
 #define MI_PREDICATE_RESULT_2	(0x2214)
 #define  LOWER_SLICE_ENABLED	(1<<0)
@@ -512,22 +514,36 @@
 #define BCS_SWCTRL 0x22200
 
 #define GPGPU_THREADS_DISPATCHED        0x2290
+#define GPGPU_THREADS_DISPATCHED_UDW	(0x2290 + 4)
 #define HS_INVOCATION_COUNT             0x2300
+#define HS_INVOCATION_COUNT_UDW		(0x2300 + 4)
 #define DS_INVOCATION_COUNT             0x2308
+#define DS_INVOCATION_COUNT_UDW		(0x2308 + 4)
 #define IA_VERTICES_COUNT               0x2310
+#define IA_VERTICES_COUNT_UDW		(0x2310 + 4)
 #define IA_PRIMITIVES_COUNT             0x2318
+#define IA_PRIMITIVES_COUNT_UDW		(0x2318 + 4)
 #define VS_INVOCATION_COUNT             0x2320
+#define VS_INVOCATION_COUNT_UDW		(0x2320 + 4)
 #define GS_INVOCATION_COUNT             0x2328
+#define GS_INVOCATION_COUNT_UDW		(0x2328 + 4)
 #define GS_PRIMITIVES_COUNT             0x2330
+#define GS_PRIMITIVES_COUNT_UDW		(0x2330 + 4)
 #define CL_INVOCATION_COUNT             0x2338
+#define CL_INVOCATION_COUNT_UDW		(0x2338 + 4)
 #define CL_PRIMITIVES_COUNT             0x2340
+#define CL_PRIMITIVES_COUNT_UDW		(0x2340 + 4)
 #define PS_INVOCATION_COUNT             0x2348
+#define PS_INVOCATION_COUNT_UDW		(0x2348 + 4)
 #define PS_DEPTH_COUNT                  0x2350
+#define PS_DEPTH_COUNT_UDW		(0x2350 + 4)
 
 /* There are the 4 64-bit counter registers, one for each stream output */
 #define GEN7_SO_NUM_PRIMS_WRITTEN(n)		(0x5200 + (n) * 8)
+#define GEN7_SO_NUM_PRIMS_WRITTEN_UDW(n)	(0x5200 + (n) * 8 + 4)
 
 #define GEN7_SO_PRIM_STORAGE_NEEDED(n)		(0x5240 + (n) * 8)
+#define GEN7_SO_PRIM_STORAGE_NEEDED_UDW(n)	(0x5240 + (n) * 8 + 4)
 
 #define GEN7_3DPRIM_END_OFFSET          0x2420
 #define GEN7_3DPRIM_START_VERTEX        0x2430