/*
 * Copyright (C) 2017 MediaTek Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See http://www.gnu.org/licenses/gpl-2.0.html for more details.
 */

#include <linux/notifier.h>

#ifdef CONFIG_MTK_SCHED_RQAVG_US
/*
 * @cpu: cpu id
 * @reset: reset the statistic start time after this time query
 * @use_maxfreq: caculate cpu loading with max cpu max frequency
 * return: cpu loading as percentage (0~100)
 */
extern unsigned int
sched_get_percpu_load(int cpu, bool reset, bool use_maxfreq);

/*
 * return: heavy task(loading>90%) number in the system
 */
extern unsigned int sched_get_nr_heavy_task(void);

/*
 * @threshold: heavy task loading threshold (0~1023)
 * return: heavy task(loading>threshold) number in the system
 */
extern unsigned int
sched_get_nr_heavy_task_by_threshold(unsigned int threshold);
#endif /* CONFIG_MTK_SCHED_RQAVG_US */

#ifdef CONFIG_MTK_SCHED_CPULOAD
extern unsigned int sched_get_cpu_load(int cpu);
#endif

int register_sched_hint_notifier(struct notifier_block *nb);
int unregister_sched_hint_notifier(struct notifier_block *nb);

enum sched_status_t {
	SCHED_STATUS_INIT,
	SCHED_STATUS_OVERUTIL,
	SCHED_STATUS_UNDERUTIL
};

enum {
	LT_WALT_POWERHAL  = 0,
	LT_WALT_FPSGO,
	LT_WALT_SCHED,
	LT_WALT_DEBUG,
	LT_UNKNOWN_USER
};

extern int sched_walt_enable(int user, int en);

/* hot plug */
extern unsigned long nr_iowait_cpu(int cpu);