drm/i915: Add a hook for making the engines idle (parking) and unparking
In the next patch, we will want to install a callback when the engines
(GT as a whole) become idle and similarly when they first become busy.
To enable that callback, first rename intel_engines_mark_idle() to
intel_engines_park() and provide the companion intel_engines_unpark().
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171025143943.7661-2-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index a2589aa..a7c95f0 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -365,6 +365,9 @@ struct intel_engine_cs {
void (*reset_hw)(struct intel_engine_cs *engine,
struct drm_i915_gem_request *req);
+ void (*park)(struct intel_engine_cs *engine);
+ void (*unpark)(struct intel_engine_cs *engine);
+
void (*set_default_submission)(struct intel_engine_cs *engine);
struct intel_ring *(*context_pin)(struct intel_engine_cs *engine,
@@ -868,7 +871,9 @@ bool intel_engines_are_idle(struct drm_i915_private *dev_priv);
bool intel_engine_has_kernel_context(const struct intel_engine_cs *engine);
-void intel_engines_mark_idle(struct drm_i915_private *i915);
+void intel_engines_park(struct drm_i915_private *i915);
+void intel_engines_unpark(struct drm_i915_private *i915);
+
void intel_engines_reset_default_submission(struct drm_i915_private *i915);
bool intel_engine_can_store_dword(struct intel_engine_cs *engine);