2 * SPDX-License-Identifier: MIT
4 * Copyright © 2019 Intel Corporation
7 #ifndef INTEL_ENGINE_PM_H
8 #define INTEL_ENGINE_PM_H
10 #include "i915_request.h"
11 #include "intel_engine_types.h"
12 #include "intel_wakeref.h"
15 intel_engine_pm_is_awake(const struct intel_engine_cs *engine)
17 return intel_wakeref_is_active(&engine->wakeref);
20 static inline void intel_engine_pm_get(struct intel_engine_cs *engine)
22 intel_wakeref_get(&engine->wakeref);
25 static inline bool intel_engine_pm_get_if_awake(struct intel_engine_cs *engine)
27 return intel_wakeref_get_if_active(&engine->wakeref);
30 static inline void intel_engine_pm_put(struct intel_engine_cs *engine)
32 intel_wakeref_put(&engine->wakeref);
35 static inline void intel_engine_pm_put_async(struct intel_engine_cs *engine)
37 intel_wakeref_put_async(&engine->wakeref);
40 static inline void intel_engine_pm_put_delay(struct intel_engine_cs *engine,
43 intel_wakeref_put_delay(&engine->wakeref, delay);
46 static inline void intel_engine_pm_flush(struct intel_engine_cs *engine)
48 intel_wakeref_unlock_wait(&engine->wakeref);
51 static inline struct i915_request *
52 intel_engine_create_kernel_request(struct intel_engine_cs *engine)
54 struct i915_request *rq;
57 * The engine->kernel_context is special as it is used inside
58 * the engine-pm barrier (see __engine_park()), circumventing
59 * the usual mutexes and relying on the engine-pm barrier
60 * instead. So whenever we use the engine->kernel_context
61 * outside of the barrier, we must manually handle the
62 * engine wakeref to serialise with the use inside.
64 intel_engine_pm_get(engine);
65 rq = i915_request_create(engine->kernel_context);
66 intel_engine_pm_put(engine);
71 void intel_engine_init__pm(struct intel_engine_cs *engine);
73 #endif /* INTEL_ENGINE_PM_H */