[Intel-gfx] [PATCH] drm/i915: Consolidate checks for engine stats availability

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Sagar noticed the check can be consolidated between the engine stats
implementation and the PMU.

My first choice was a static inline helper but that got into include
ordering mess quickly fast so I went with a macro instead. At some point
we should perhaps looking into taking out the non-ringubffer bits from
intel_ringbuffer.h into a new intel_engine.h or something.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Suggested-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble at intel.com>
---
 drivers/gpu/drm/i915/i915_pmu.c         | 9 ++-------
 drivers/gpu/drm/i915/intel_engine_cs.c  | 4 ++--
 drivers/gpu/drm/i915/intel_ringbuffer.h | 2 ++
 3 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
index 1071935bfa67..112243720ff3 100644
--- a/drivers/gpu/drm/i915/i915_pmu.c
+++ b/drivers/gpu/drm/i915/i915_pmu.c
@@ -90,11 +90,6 @@ static unsigned int event_enabled_bit(struct perf_event *event)
 	return config_enabled_bit(event->attr.config);
 }
 
-static bool supports_busy_stats(struct drm_i915_private *i915)
-{
-	return INTEL_GEN(i915) >= 8;
-}
-
 static bool pmu_needs_timer(struct drm_i915_private *i915, bool gpu_active)
 {
 	u64 enable;
@@ -124,7 +119,7 @@ static bool pmu_needs_timer(struct drm_i915_private *i915, bool gpu_active)
 	 * Also there is software busyness tracking available we do not
 	 * need the timer for I915_SAMPLE_BUSY counter.
 	 */
-	else if (supports_busy_stats(i915))
+	else if (intel_supports_engine_stats(i915))
 		enable &= ~BIT(I915_SAMPLE_BUSY);
 
 	/*
@@ -463,7 +458,7 @@ static void i915_pmu_event_read(struct perf_event *event)
 
 static bool engine_needs_busy_stats(struct intel_engine_cs *engine)
 {
-	return supports_busy_stats(engine->i915) &&
+	return intel_supports_engine_stats(engine->i915) &&
 	       (engine->pmu.enable & BIT(I915_SAMPLE_BUSY));
 }
 
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index fede62daf3e1..d53680c08cb0 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1863,7 +1863,7 @@ int intel_enable_engine_stats(struct intel_engine_cs *engine)
 {
 	unsigned long flags;
 
-	if (INTEL_GEN(engine->i915) < 8)
+	if (!intel_supports_engine_stats(engine->i915))
 		return -ENODEV;
 
 	spin_lock_irqsave(&engine->stats.lock, flags);
@@ -1924,7 +1924,7 @@ void intel_disable_engine_stats(struct intel_engine_cs *engine)
 {
 	unsigned long flags;
 
-	if (INTEL_GEN(engine->i915) < 8)
+	if (!intel_supports_engine_stats(engine->i915))
 		return;
 
 	spin_lock_irqsave(&engine->stats.lock, flags);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 3bd30d011866..37a389ff031e 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -1054,6 +1054,8 @@ static inline void intel_engine_context_out(struct intel_engine_cs *engine)
 	spin_unlock_irqrestore(&engine->stats.lock, flags);
 }
 
+#define intel_supports_engine_stats(i915) (INTEL_GEN(i915) >= 8)
+
 int intel_enable_engine_stats(struct intel_engine_cs *engine);
 void intel_disable_engine_stats(struct intel_engine_cs *engine);
 
-- 
2.14.1