drm/i915: Remove identical macros

Remove some macros which are now obviously identical.

v2: Added HAS_FWTABLE macro and simplified intel_uncore_forcewake_for_read.
    (Joonas Lahtinen)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/intel_uncore.c

@@ -639,6 +639,11 @@ intel_fw_table_check(struct drm_i915_private *dev_priv)
 #define GEN_FW_RANGE(s, e, d) \
 	{ .start = (s), .end = (e), .domains = (d) }
 
+#define HAS_FWTABLE(dev_priv) \
+	(IS_GEN9(dev_priv) || \
+	 IS_CHERRYVIEW(dev_priv) || \
+	 IS_VALLEYVIEW(dev_priv))
+
 /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
 static const struct intel_forcewake_range __vlv_fw_ranges[] = {
 	GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
@@ -650,7 +655,7 @@ static const struct intel_forcewake_range __vlv_fw_ranges[] = {
 	GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
 };
 
-#define __vlv_reg_read_fw_domains(offset) \
+#define __fwtable_reg_read_fw_domains(offset) \
 ({ \
 	enum forcewake_domains __fwd = 0; \
 	if (NEEDS_FORCE_WAKE((offset))) \
@@ -708,14 +713,6 @@ static const struct intel_forcewake_range __chv_fw_ranges[] = {
 	GEN_FW_RANGE(0x30000, 0x37fff, FORCEWAKE_MEDIA),
 };
 
-#define __chv_reg_read_fw_domains(offset) \
-({ \
-	enum forcewake_domains __fwd = 0; \
-	if (NEEDS_FORCE_WAKE((offset))) \
-		__fwd = find_fw_domain(dev_priv, offset); \
-	__fwd; \
-})
-
 #define __chv_reg_write_fw_domains(offset) \
 ({ \
 	enum forcewake_domains __fwd = 0; \
@@ -760,14 +757,6 @@ static const struct intel_forcewake_range __gen9_fw_ranges[] = {
 	GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
 };
 
-#define __gen9_reg_read_fw_domains(offset) \
-({ \
-	enum forcewake_domains __fwd = 0; \
-	if (NEEDS_FORCE_WAKE((offset))) \
-		__fwd = find_fw_domain(dev_priv, offset); \
-	__fwd; \
-})
-
 static const i915_reg_t gen9_shadowed_regs[] = {
 	RING_TAIL(RENDER_RING_BASE),
 	RING_TAIL(GEN6_BSD_RING_BASE),
@@ -927,7 +916,7 @@ static u##x \
 vlv_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
 	enum forcewake_domains fw_engine; \
 	GEN6_READ_HEADER(x); \
-	fw_engine = __vlv_reg_read_fw_domains(offset); \
+	fw_engine = __fwtable_reg_read_fw_domains(offset); \
 	if (fw_engine) \
 		__force_wake_auto(dev_priv, fw_engine); \
 	val = __raw_i915_read##x(dev_priv, reg); \
@@ -939,7 +928,7 @@ static u##x \
 chv_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
 	enum forcewake_domains fw_engine; \
 	GEN6_READ_HEADER(x); \
-	fw_engine = __chv_reg_read_fw_domains(offset); \
+	fw_engine = __fwtable_reg_read_fw_domains(offset); \
 	if (fw_engine) \
 		__force_wake_auto(dev_priv, fw_engine); \
 	val = __raw_i915_read##x(dev_priv, reg); \
@@ -951,7 +940,7 @@ static u##x \
 gen9_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
 	enum forcewake_domains fw_engine; \
 	GEN6_READ_HEADER(x); \
-	fw_engine = __gen9_reg_read_fw_domains(offset); \
+	fw_engine = __fwtable_reg_read_fw_domains(offset); \
 	if (fw_engine) \
 		__force_wake_auto(dev_priv, fw_engine); \
 	val = __raw_i915_read##x(dev_priv, reg); \
@@ -1823,35 +1812,16 @@ static enum forcewake_domains
 intel_uncore_forcewake_for_read(struct drm_i915_private *dev_priv,
 				i915_reg_t reg)
 {
+	u32 offset = i915_mmio_reg_offset(reg);
 	enum forcewake_domains fw_domains;
 
-	if (intel_vgpu_active(dev_priv))
-		return 0;
-
-	switch (INTEL_GEN(dev_priv)) {
-	case 9:
-		fw_domains = __gen9_reg_read_fw_domains(i915_mmio_reg_offset(reg));
-		break;
-	case 8:
-		if (IS_CHERRYVIEW(dev_priv))
-			fw_domains = __chv_reg_read_fw_domains(i915_mmio_reg_offset(reg));
-		else
-			fw_domains = __gen6_reg_read_fw_domains(i915_mmio_reg_offset(reg));
-		break;
-	case 7:
-	case 6:
-		if (IS_VALLEYVIEW(dev_priv))
-			fw_domains = __vlv_reg_read_fw_domains(i915_mmio_reg_offset(reg));
-		else
-			fw_domains = __gen6_reg_read_fw_domains(i915_mmio_reg_offset(reg));
-		break;
-	default:
-		MISSING_CASE(INTEL_INFO(dev_priv)->gen);
-	case 5: /* forcewake was introduced with gen6 */
-	case 4:
-	case 3:
-	case 2:
-		return 0;
+	if (HAS_FWTABLE(dev_priv)) {
+		fw_domains = __fwtable_reg_read_fw_domains(offset);
+	} else if (INTEL_GEN(dev_priv) >= 6) {
+		fw_domains = __gen6_reg_read_fw_domains(offset);
+	} else {
+		WARN_ON(!IS_GEN(dev_priv, 2, 5));
+		fw_domains = 0;
 	}
 
 	WARN_ON(fw_domains & ~dev_priv->uncore.fw_domains);
@@ -1865,9 +1835,6 @@ intel_uncore_forcewake_for_write(struct drm_i915_private *dev_priv,
 {
 	enum forcewake_domains fw_domains;
 
-	if (intel_vgpu_active(dev_priv))
-		return 0;
-
 	switch (INTEL_GEN(dev_priv)) {
 	case 9:
 		fw_domains = __gen9_reg_write_fw_domains(i915_mmio_reg_offset(reg));
@@ -1918,6 +1885,9 @@ intel_uncore_forcewake_for_reg(struct drm_i915_private *dev_priv,
 
 	WARN_ON(!op);
 
+	if (intel_vgpu_active(dev_priv))
+		return 0;
+
 	if (op & FW_REG_READ)
 		fw_domains = intel_uncore_forcewake_for_read(dev_priv, reg);