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/*
* Copyright (c) 2014, 2016, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only 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 the
* GNU General Public License for more details.
*/
#ifndef _GOVERNOR_CACHE_HWMON_H
#define _GOVERNOR_CACHE_HWMON_H
#include <linux/kernel.h>
#include <linux/devfreq.h>
enum request_group {
HIGH,
MED,
LOW,
MAX_NUM_GROUPS,
};
struct mrps_stats {
unsigned long mrps[MAX_NUM_GROUPS];
unsigned int busy_percent;
};
/**
* struct cache_hwmon - devfreq Cache HW monitor info
* @start_hwmon: Start the HW monitoring
* @stop_hwmon: Stop the HW monitoring
* @meas_mrps_and_set_irq: Return the measured count and set up the
* IRQ to fire if usage exceeds current
* measurement by @tol percent.
* @dev: device that this HW monitor can monitor.
* @of_node: OF node of device that this HW monitor can monitor.
* @df: Devfreq node that this HW montior is being used
* for. NULL when not actively in use, and non-NULL
* when in use.
*/
struct cache_hwmon {
int (*start_hwmon)(struct cache_hwmon *hw, struct mrps_stats *mrps);
void (*stop_hwmon)(struct cache_hwmon *hw);
unsigned long (*meas_mrps_and_set_irq)(struct cache_hwmon *hw,
unsigned int tol, unsigned int us,
struct mrps_stats *mrps);
struct device *dev;
struct device_node *of_node;
struct devfreq *df;
};
#ifdef CONFIG_DEVFREQ_GOV_QCOM_CACHE_HWMON
int register_cache_hwmon(struct device *dev, struct cache_hwmon *hwmon);
int update_cache_hwmon(struct cache_hwmon *hwmon);
#else
static inline int register_cache_hwmon(struct device *dev,
struct cache_hwmon *hwmon)
{
return 0;
}
int update_cache_hwmon(struct cache_hwmon *hwmon)
{
return 0;
}
#endif
#endif /* _GOVERNOR_CACHE_HWMON_H */
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