e9037e7f9a
In some cases we want to hold onto the wakeref for a little after the last user so that we can avoid having to drop and then immediately reacquire it. Allow the last user to specify if they would like to keep the wakeref alive for a short hysteresis. v2: Embrace bitfield.h for adjustable flags. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200323103221.14444-1-chris@chris-wilson.co.uk
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright © 2019 Intel Corporation
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*/
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#ifndef INTEL_ENGINE_PM_H
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#define INTEL_ENGINE_PM_H
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#include "i915_request.h"
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#include "intel_engine_types.h"
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#include "intel_wakeref.h"
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static inline bool
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intel_engine_pm_is_awake(const struct intel_engine_cs *engine)
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{
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return intel_wakeref_is_active(&engine->wakeref);
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}
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static inline void intel_engine_pm_get(struct intel_engine_cs *engine)
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{
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intel_wakeref_get(&engine->wakeref);
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}
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static inline bool intel_engine_pm_get_if_awake(struct intel_engine_cs *engine)
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{
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return intel_wakeref_get_if_active(&engine->wakeref);
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}
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static inline void intel_engine_pm_put(struct intel_engine_cs *engine)
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{
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intel_wakeref_put(&engine->wakeref);
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}
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static inline void intel_engine_pm_put_async(struct intel_engine_cs *engine)
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{
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intel_wakeref_put_async(&engine->wakeref);
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}
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static inline void intel_engine_pm_put_delay(struct intel_engine_cs *engine,
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unsigned long delay)
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{
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intel_wakeref_put_delay(&engine->wakeref, delay);
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}
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static inline void intel_engine_pm_flush(struct intel_engine_cs *engine)
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{
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intel_wakeref_unlock_wait(&engine->wakeref);
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}
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static inline struct i915_request *
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intel_engine_create_kernel_request(struct intel_engine_cs *engine)
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{
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struct i915_request *rq;
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/*
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* The engine->kernel_context is special as it is used inside
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* the engine-pm barrier (see __engine_park()), circumventing
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* the usual mutexes and relying on the engine-pm barrier
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* instead. So whenever we use the engine->kernel_context
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* outside of the barrier, we must manually handle the
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* engine wakeref to serialise with the use inside.
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*/
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intel_engine_pm_get(engine);
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rq = i915_request_create(engine->kernel_context);
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intel_engine_pm_put(engine);
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return rq;
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}
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void intel_engine_init__pm(struct intel_engine_cs *engine);
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#endif /* INTEL_ENGINE_PM_H */
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