[Intel-gfx] [PATCH 06/10] drm/i915/chv: Streamline CHV forcewake stuff

[deepak.s at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Streamline the CHV forcewake functions just like was done for VLV.

This will also fix a bug in accessing the common well registers,
where we'd end up trying to wake up the wells too many times
since we'd call force_wake_get/put twice per register access, with
FORCEFAKE_ALL both times.

Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_uncore.c | 88 ++++++++++++++-----------------------
 1 file changed, 32 insertions(+), 56 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 11741e4..f1264e2 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -619,35 +619,22 @@ chv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
 	unsigned fwengine = 0; \
 	REG_READ_HEADER(x); \
 	if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) { \
-		fwengine = FORCEWAKE_RENDER; \
-	} \
-	else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) { \
-		fwengine = FORCEWAKE_MEDIA; \
-	} \
-	else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) { \
-		fwengine = FORCEWAKE_ALL; \
-	} \
-	if (FORCEWAKE_RENDER & fwengine) { \
-		if (dev_priv->uncore.fw_rendercount++ == 0) \
-			(dev_priv)->uncore.funcs.force_wake_get(dev_priv, \
-								fwengine); \
-	} \
-	if (FORCEWAKE_MEDIA & fwengine) { \
-		if (dev_priv->uncore.fw_mediacount++ == 0) \
-			(dev_priv)->uncore.funcs.force_wake_get(dev_priv, \
-								fwengine); \
+		if (dev_priv->uncore.fw_rendercount == 0) \
+			fwengine = FORCEWAKE_RENDER; \
+	} else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) { \
+		if (dev_priv->uncore.fw_mediacount == 0) \
+			fwengine = FORCEWAKE_MEDIA; \
+	} else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) { \
+		if (dev_priv->uncore.fw_rendercount == 0) \
+			fwengine |= FORCEWAKE_RENDER; \
+		if (dev_priv->uncore.fw_mediacount == 0) \
+			fwengine |= FORCEWAKE_MEDIA; \
 	} \
+	if (fwengine) \
+		dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
 	val = __raw_i915_read##x(dev_priv, reg); \
-	if (FORCEWAKE_RENDER & fwengine) { \
-		if (--dev_priv->uncore.fw_rendercount == 0) \
-			(dev_priv)->uncore.funcs.force_wake_put(dev_priv, \
-								fwengine); \
-	} \
-	if (FORCEWAKE_MEDIA & fwengine) { \
-		if (--dev_priv->uncore.fw_mediacount == 0) \
-			(dev_priv)->uncore.funcs.force_wake_put(dev_priv, \
-								fwengine); \
-	} \
+	if (fwengine) \
+		dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
 	REG_READ_FOOTER; \
 }
 
@@ -781,38 +768,27 @@ gen8_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace
 static void \
 chv_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
 	unsigned fwengine = 0; \
-	bool __needs_put = !is_gen8_shadowed(dev_priv, reg); \
+	bool shadowed = is_gen8_shadowed(dev_priv, reg); \
 	REG_WRITE_HEADER; \
-	if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) { \
-		fwengine = FORCEWAKE_RENDER; \
-	} \
-	else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) { \
-		fwengine = FORCEWAKE_MEDIA; \
-	} \
-	else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) { \
-		fwengine = FORCEWAKE_ALL; \
-	} \
-	if (__needs_put && (FORCEWAKE_RENDER & fwengine)) { \
-			if (dev_priv->uncore.fw_rendercount++ == 0) \
-				(dev_priv)->uncore.funcs.force_wake_get(dev_priv, \
-									fwengine); \
-	} \
-	if (__needs_put && (FORCEWAKE_MEDIA & fwengine)) { \
-		if (dev_priv->uncore.fw_mediacount++ == 0) \
-			(dev_priv)->uncore.funcs.force_wake_get(dev_priv, \
-								fwengine); \
+	if (!shadowed) { \
+		if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) { \
+			if (dev_priv->uncore.fw_rendercount == 0) \
+				fwengine = FORCEWAKE_RENDER; \
+		} else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) { \
+			if (dev_priv->uncore.fw_mediacount == 0) \
+				fwengine = FORCEWAKE_MEDIA; \
+		} else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) { \
+			if (dev_priv->uncore.fw_rendercount == 0) \
+				fwengine |= FORCEWAKE_RENDER; \
+			if (dev_priv->uncore.fw_mediacount == 0) \
+				fwengine |= FORCEWAKE_MEDIA; \
+		} \
 	} \
+	if (fwengine) \
+		dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
 	__raw_i915_write##x(dev_priv, reg, val); \
-	if (__needs_put && (FORCEWAKE_RENDER & fwengine)) { \
-			if (--dev_priv->uncore.fw_rendercount == 0) \
-				(dev_priv)->uncore.funcs.force_wake_put(dev_priv, \
-									fwengine); \
-	} \
-	if (__needs_put && (FORCEWAKE_MEDIA & fwengine)) { \
-		if (--dev_priv->uncore.fw_mediacount == 0) \
-			(dev_priv)->uncore.funcs.force_wake_put(dev_priv, \
-								fwengine); \
-	} \
+	if (fwengine) \
+		dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
 	REG_WRITE_FOOTER; \
 }
 
-- 
1.9.1