| /* |
| * Copyright (c) 2014, 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_MSM_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 */ |