[010/262] drm/i915: Remove USES_GUC_SUBMISSION() pointer chasing from gen8_cs_irq_handler

Commit Message

Chris Wilson May 17, 2018, 6:03 a.m. UTC

Store whether or not we need to kick the guc's execlists emulation on
the engine itself to avoid chasing the device info.

gen8_cs_irq_handler                          512     428     -84

Signed-off-by: Chris Wilson <[e-mail]>
---
 drivers/gpu/drm/i915/i915_irq.c             | 4 +++-
 drivers/gpu/drm/i915/intel_guc_submission.c | 1 +
 drivers/gpu/drm/i915/intel_lrc.c            | 1 +
 drivers/gpu/drm/i915/intel_ringbuffer.h     | 7 +++++++
 4 files changed, 12 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index f9bc3aaa90d0..460878572515 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1472,8 +1472,10 @@  gen8_cs_irq_handler(struct intel_engine_cs *engine, u32 iir)
 	}
 
 	if (iir & GT_RENDER_USER_INTERRUPT) {
+		if (intel_engine_uses_guc(engine))
+			tasklet = true;
+
 		notify_ring(engine);
-		tasklet |= USES_GUC_SUBMISSION(engine->i915);
 	}
 
 	if (tasklet)
diff --git a/drivers/gpu/drm/i915/intel_guc_submission.c b/drivers/gpu/drm/i915/intel_guc_submission.c
index 133367a17863..d9fcd5db4ea4 100644
--- a/drivers/gpu/drm/i915/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/intel_guc_submission.c
@@ -1312,6 +1312,7 @@  int intel_guc_submission_enable(struct intel_guc *guc)
 		engine->unpark = guc_submission_unpark;
 
 		engine->flags &= ~I915_ENGINE_SUPPORTS_STATS;
+		engine->flags |= I915_ENGINE_USES_GUC;
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 857ab04452f0..4928e9ad7826 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -2305,6 +2305,7 @@  static void execlists_set_default_submission(struct intel_engine_cs *engine)
 	engine->park = NULL;
 	engine->unpark = NULL;
 
+	engine->flags &= ~I915_ENGINE_USES_GUC;
 	engine->flags |= I915_ENGINE_SUPPORTS_STATS;
 	if (engine->i915->preempt_context)
 		engine->flags |= I915_ENGINE_HAS_PREEMPTION;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index acef385c4c80..4ad9c5842575 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -574,6 +574,7 @@  struct intel_engine_cs {
 #define I915_ENGINE_NEEDS_CMD_PARSER BIT(0)
 #define I915_ENGINE_SUPPORTS_STATS   BIT(1)
 #define I915_ENGINE_HAS_PREEMPTION   BIT(2)
+#define I915_ENGINE_USES_GUC         BIT(3)
 	unsigned int flags;
 
 	/*
@@ -651,6 +652,12 @@  intel_engine_has_preemption(const struct intel_engine_cs *engine)
 	return engine->flags & I915_ENGINE_HAS_PREEMPTION;
 }
 
+static inline bool
+intel_engine_uses_guc(const struct intel_engine_cs *engine)
+{
+	return engine->flags & I915_ENGINE_USES_GUC;
+}
+
 static inline bool __execlists_need_preempt(int prio, int last)
 {
 	return prio > max(0, last);