[PATCH 8/9] drm/i915/pmu: Split reading engine and other events into helpers

[Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>]

Split the event reading function into engine and other helpers.

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_pmu.c | 93 ++++++++++++++++++---------------
 1 file changed, 52 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
index 40ce1dc00067..9bd9605d2662 100644
--- a/drivers/gpu/drm/i915/i915_pmu.c
+++ b/drivers/gpu/drm/i915/i915_pmu.c
@@ -641,58 +641,69 @@ static u64 read_sample_us(struct i915_pmu *pmu, unsigned int gt_id, int sample)
 	return div_u64(read_sample(pmu, gt_id, sample), USEC_PER_SEC);
 }
 
-static u64 __i915_pmu_event_read(struct perf_event *event)
+static u64 __i915_pmu_event_read_engine(struct perf_event *event)
 {
-	struct drm_i915_private *i915 =
-		container_of(event->pmu, typeof(*i915), pmu.base);
-	struct i915_pmu *pmu = &i915->pmu;
+	struct drm_i915_private *i915 = container_of(event->pmu, typeof(*i915), pmu.base);
+	u8 sample = engine_event_sample(event);
+	struct intel_engine_cs *engine;
 	u64 val = 0;
 
-	if (is_engine_event(event)) {
-		u8 sample = engine_event_sample(event);
-		struct intel_engine_cs *engine;
-
-		engine = intel_engine_lookup_user(i915,
-						  engine_event_class(event),
-						  engine_event_instance(event));
+	engine = intel_engine_lookup_user(i915,
+					  engine_event_class(event),
+					  engine_event_instance(event));
 
-		if (drm_WARN_ON_ONCE(&i915->drm, !engine)) {
-			/* Do nothing */
-		} else if (sample == I915_SAMPLE_BUSY &&
-			   intel_engine_supports_stats(engine)) {
-			ktime_t unused;
+	if (drm_WARN_ON_ONCE(&i915->drm, !engine)) {
+		/* Do nothing */
+	} else if (sample == I915_SAMPLE_BUSY &&
+		   intel_engine_supports_stats(engine)) {
+		ktime_t unused;
 
-			val = ktime_to_ns(intel_engine_get_busy_time(engine,
-								     &unused));
-		} else {
-			val = engine->pmu.sample[sample].cur;
-		}
+		val = ktime_to_ns(intel_engine_get_busy_time(engine,
+							     &unused));
 	} else {
-		const unsigned int gt_id = config_gt_id(event->attr.config);
-		const u64 config = config_counter(event->attr.config);
-
-		switch (config) {
-		case I915_PMU_ACTUAL_FREQUENCY:
-			val = read_sample_us(pmu, gt_id, __I915_SAMPLE_FREQ_ACT);
-			break;
-		case I915_PMU_REQUESTED_FREQUENCY:
-			val = read_sample_us(pmu, gt_id, __I915_SAMPLE_FREQ_REQ);
-			break;
-		case I915_PMU_INTERRUPTS:
-			val = READ_ONCE(pmu->irq_count);
-			break;
-		case I915_PMU_RC6_RESIDENCY:
-			val = get_rc6(i915->gt[gt_id]);
-			break;
-		case I915_PMU_SOFTWARE_GT_AWAKE_TIME:
-			val = ktime_to_ns(intel_gt_get_awake_time(to_gt(i915)));
-			break;
-		}
+		val = engine->pmu.sample[sample].cur;
 	}
 
 	return val;
 }
 
+static u64 __i915_pmu_event_read_other(struct perf_event *event)
+{
+	struct drm_i915_private *i915 = container_of(event->pmu, typeof(*i915), pmu.base);
+	const unsigned int gt_id = config_gt_id(event->attr.config);
+	const u64 config = config_counter(event->attr.config);
+	struct i915_pmu *pmu = &i915->pmu;
+	u64 val = 0;
+
+	switch (config) {
+	case I915_PMU_ACTUAL_FREQUENCY:
+		val = read_sample_us(pmu, gt_id, __I915_SAMPLE_FREQ_ACT);
+		break;
+	case I915_PMU_REQUESTED_FREQUENCY:
+		val = read_sample_us(pmu, gt_id, __I915_SAMPLE_FREQ_REQ);
+		break;
+	case I915_PMU_INTERRUPTS:
+		val = READ_ONCE(pmu->irq_count);
+		break;
+	case I915_PMU_RC6_RESIDENCY:
+		val = get_rc6(i915->gt[gt_id]);
+		break;
+	case I915_PMU_SOFTWARE_GT_AWAKE_TIME:
+		val = ktime_to_ns(intel_gt_get_awake_time(to_gt(i915)));
+		break;
+	}
+
+	return val;
+}
+
+static u64 __i915_pmu_event_read(struct perf_event *event)
+{
+	if (is_engine_event(event))
+		return __i915_pmu_event_read_engine(event);
+	else
+		return __i915_pmu_event_read_other(event);
+}
+
 static void i915_pmu_event_read(struct perf_event *event)
 {
 	struct drm_i915_private *i915 =
-- 
2.36.1