72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
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/*
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* Copyright (c) 2014, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _GOVERNOR_CACHE_HWMON_H
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#define _GOVERNOR_CACHE_HWMON_H
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#include <linux/kernel.h>
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#include <linux/devfreq.h>
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enum request_group {
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HIGH,
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MED,
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LOW,
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MAX_NUM_GROUPS,
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};
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struct mrps_stats {
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unsigned long mrps[MAX_NUM_GROUPS];
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unsigned int busy_percent;
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};
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/**
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* struct cache_hwmon - devfreq Cache HW monitor info
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* @start_hwmon: Start the HW monitoring
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* @stop_hwmon: Stop the HW monitoring
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* @meas_mrps_and_set_irq: Return the measured count and set up the
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* IRQ to fire if usage exceeds current
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* measurement by @tol percent.
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* @dev: device that this HW monitor can monitor.
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* @of_node: OF node of device that this HW monitor can monitor.
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* @df: Devfreq node that this HW montior is being used
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* for. NULL when not actively in use, and non-NULL
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* when in use.
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*/
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struct cache_hwmon {
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int (*start_hwmon)(struct cache_hwmon *hw, struct mrps_stats *mrps);
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void (*stop_hwmon)(struct cache_hwmon *hw);
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unsigned long (*meas_mrps_and_set_irq)(struct cache_hwmon *hw,
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unsigned int tol, unsigned int us,
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struct mrps_stats *mrps);
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struct device *dev;
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struct device_node *of_node;
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struct devfreq *df;
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};
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#ifdef CONFIG_DEVFREQ_GOV_MSM_CACHE_HWMON
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int register_cache_hwmon(struct device *dev, struct cache_hwmon *hwmon);
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int update_cache_hwmon(struct cache_hwmon *hwmon);
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#else
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static inline int register_cache_hwmon(struct device *dev,
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struct cache_hwmon *hwmon)
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{
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return 0;
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}
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int update_cache_hwmon(struct cache_hwmon *hwmon)
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{
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return 0;
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}
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#endif
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#endif /* _GOVERNOR_CACHE_HWMON_H */
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