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/*
* 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 */
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