/* * SPDX-License-Identifier: MIT * * Copyright © 2019 Intel Corporation */ #ifndef INTEL_ENGINE_PM_H #define INTEL_ENGINE_PM_H #include "i915_request.h" #include "intel_engine_types.h" #include "intel_wakeref.h" static inline bool intel_engine_pm_is_awake(const struct intel_engine_cs *engine) { return intel_wakeref_is_active(&engine->wakeref); } static inline void intel_engine_pm_get(struct intel_engine_cs *engine) { intel_wakeref_get(&engine->wakeref); } static inline bool intel_engine_pm_get_if_awake(struct intel_engine_cs *engine) { return intel_wakeref_get_if_active(&engine->wakeref); } static inline void intel_engine_pm_put(struct intel_engine_cs *engine) { intel_wakeref_put(&engine->wakeref); } static inline void intel_engine_pm_put_async(struct intel_engine_cs *engine) { intel_wakeref_put_async(&engine->wakeref); } static inline void intel_engine_pm_flush(struct intel_engine_cs *engine) { intel_wakeref_unlock_wait(&engine->wakeref); } static inline struct i915_request * intel_engine_create_kernel_request(struct intel_engine_cs *engine) { struct i915_request *rq; /* * The engine->kernel_context is special as it is used inside * the engine-pm barrier (see __engine_park()), circumventing * the usual mutexes and relying on the engine-pm barrier * instead. So whenever we use the engine->kernel_context * outside of the barrier, we must manually handle the * engine wakeref to serialise with the use inside. */ intel_engine_pm_get(engine); rq = i915_request_create(engine->kernel_context); intel_engine_pm_put(engine); return rq; } void intel_engine_init__pm(struct intel_engine_cs *engine); #endif /* INTEL_ENGINE_PM_H */