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linux-next/include/linux/idle_inject.h

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powercap / idle_inject: Add an idle injection framework Initially, the cpu_cooling device for ARM was changed by adding a new policy inserting idle cycles. The intel_powerclamp driver does a similar action. Instead of implementing idle injections privately in the cpu_cooling device, move the idle injection code in a dedicated framework and give the opportunity to other frameworks to make use of it. The framework relies on the smpboot kthreads which handles via its main loop the common code for hotplugging and [un]parking. This code was previously tested with the cpu cooling device and went through several iterations. It results now in split code and API exported in the header file. It was tested with the cpu cooling device with success. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> [ rjw: Rewrite of all comments ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-06-26 18:53:29 +08:00
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2018 Linaro Ltd
*
* Author: Daniel Lezcano <daniel.lezcano@linaro.org>
*
*/
#ifndef __IDLE_INJECT_H__
#define __IDLE_INJECT_H__
/* private idle injection device structure */
struct idle_inject_device;
struct idle_inject_device *idle_inject_register(struct cpumask *cpumask);
void idle_inject_unregister(struct idle_inject_device *ii_dev);
int idle_inject_start(struct idle_inject_device *ii_dev);
void idle_inject_stop(struct idle_inject_device *ii_dev);
void idle_inject_set_duration(struct idle_inject_device *ii_dev,
unsigned int run_duration_ms,
unsigned int idle_duration_ms);
void idle_inject_get_duration(struct idle_inject_device *ii_dev,
unsigned int *run_duration_ms,
unsigned int *idle_duration_ms);
#endif /* __IDLE_INJECT_H__ */
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