On 24/03/16 14:31, Chris Wilson wrote:
__force_wake_get() only acquire a temporary wakeref on forcewake that is
automatically releases when a timer expires. When reading the code
again, I confused __intel_uncore_forcewake_get for __force_wake_get and
to my shame thought I found a bug in an unbalanced wake_count handling.
I claim that if the function had been called __force_wake_auto instead I
would not have embarrassed myself.
Confused myself more than once so on the basis on that I think it is a
good naming distinction to make.
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Regards,
Tvrtko
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_uncore.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 96799392c2c7..165ebce5b638 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -716,8 +716,8 @@ __gen2_read(64)
trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
return val
-static inline void __force_wake_get(struct drm_i915_private *dev_priv,
- enum forcewake_domains fw_domains)
+static inline void __force_wake_auto(struct drm_i915_private *dev_priv,
+ enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *domain;
enum forcewake_domain_id id;
@@ -745,7 +745,7 @@ static u##x \
gen6_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
GEN6_READ_HEADER(x); \
if (NEEDS_FORCE_WAKE(offset)) \
- __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
+ __force_wake_auto(dev_priv, FORCEWAKE_RENDER); \
val = __raw_i915_read##x(dev_priv, reg); \
GEN6_READ_FOOTER; \
}
@@ -762,7 +762,7 @@ vlv_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(offset)) \
fw_engine = FORCEWAKE_MEDIA; \
if (fw_engine) \
- __force_wake_get(dev_priv, fw_engine); \
+ __force_wake_auto(dev_priv, fw_engine); \
val = __raw_i915_read##x(dev_priv, reg); \
GEN6_READ_FOOTER; \
}
@@ -781,7 +781,7 @@ chv_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(offset)) \
fw_engine = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \
if (fw_engine) \
- __force_wake_get(dev_priv, fw_engine); \
+ __force_wake_auto(dev_priv, fw_engine); \
val = __raw_i915_read##x(dev_priv, reg); \
GEN6_READ_FOOTER; \
}
@@ -805,7 +805,7 @@ gen9_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \
else \
fw_engine = FORCEWAKE_BLITTER; \
if (fw_engine) \
- __force_wake_get(dev_priv, fw_engine); \
+ __force_wake_auto(dev_priv, fw_engine); \
val = __raw_i915_read##x(dev_priv, reg); \
GEN6_READ_FOOTER; \
}
@@ -969,7 +969,7 @@ static void \
gen8_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \
GEN6_WRITE_HEADER; \
if (NEEDS_FORCE_WAKE(offset) && !is_gen8_shadowed(dev_priv, reg)) \
- __force_wake_get(dev_priv, FORCEWAKE_RENDER); \
+ __force_wake_auto(dev_priv, FORCEWAKE_RENDER); \
__raw_i915_write##x(dev_priv, reg, val); \
GEN6_WRITE_FOOTER; \
}
@@ -989,7 +989,7 @@ chv_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool t
else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(offset)) \
fw_engine = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \
if (fw_engine) \
- __force_wake_get(dev_priv, fw_engine); \
+ __force_wake_auto(dev_priv, fw_engine); \
__raw_i915_write##x(dev_priv, reg, val); \
GEN6_WRITE_FOOTER; \
}
@@ -1036,7 +1036,7 @@ gen9_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, \
else \
fw_engine = FORCEWAKE_BLITTER; \
if (fw_engine) \
- __force_wake_get(dev_priv, fw_engine); \
+ __force_wake_auto(dev_priv, fw_engine); \
__raw_i915_write##x(dev_priv, reg, val); \
GEN6_WRITE_FOOTER; \
}
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