mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 20:35:17 +07:00
d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
189 lines
5.5 KiB
C
189 lines
5.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* devfreq-event: a framework to provide raw data and events of devfreq devices
|
|
*
|
|
* Copyright (C) 2014 Samsung Electronics
|
|
* Author: Chanwoo Choi <cw00.choi@samsung.com>
|
|
*/
|
|
|
|
#ifndef __LINUX_DEVFREQ_EVENT_H__
|
|
#define __LINUX_DEVFREQ_EVENT_H__
|
|
|
|
#include <linux/device.h>
|
|
|
|
/**
|
|
* struct devfreq_event_dev - the devfreq-event device
|
|
*
|
|
* @node : Contain the devfreq-event device that have been registered.
|
|
* @dev : the device registered by devfreq-event class. dev.parent is
|
|
* the device using devfreq-event.
|
|
* @lock : a mutex to protect accessing devfreq-event.
|
|
* @enable_count: the number of enable function have been called.
|
|
* @desc : the description for devfreq-event device.
|
|
*
|
|
* This structure contains devfreq-event device information.
|
|
*/
|
|
struct devfreq_event_dev {
|
|
struct list_head node;
|
|
|
|
struct device dev;
|
|
struct mutex lock;
|
|
u32 enable_count;
|
|
|
|
const struct devfreq_event_desc *desc;
|
|
};
|
|
|
|
/**
|
|
* struct devfreq_event_data - the devfreq-event data
|
|
*
|
|
* @load_count : load count of devfreq-event device for the given period.
|
|
* @total_count : total count of devfreq-event device for the given period.
|
|
* each count may represent a clock cycle, a time unit
|
|
* (ns/us/...), or anything the device driver wants.
|
|
* Generally, utilization is load_count / total_count.
|
|
*
|
|
* This structure contains the data of devfreq-event device for polling period.
|
|
*/
|
|
struct devfreq_event_data {
|
|
unsigned long load_count;
|
|
unsigned long total_count;
|
|
};
|
|
|
|
/**
|
|
* struct devfreq_event_ops - the operations of devfreq-event device
|
|
*
|
|
* @enable : Enable the devfreq-event device.
|
|
* @disable : Disable the devfreq-event device.
|
|
* @reset : Reset all setting of the devfreq-event device.
|
|
* @set_event : Set the specific event type for the devfreq-event device.
|
|
* @get_event : Get the result of the devfreq-event devie with specific
|
|
* event type.
|
|
*
|
|
* This structure contains devfreq-event device operations which can be
|
|
* implemented by devfreq-event device drivers.
|
|
*/
|
|
struct devfreq_event_ops {
|
|
/* Optional functions */
|
|
int (*enable)(struct devfreq_event_dev *edev);
|
|
int (*disable)(struct devfreq_event_dev *edev);
|
|
int (*reset)(struct devfreq_event_dev *edev);
|
|
|
|
/* Mandatory functions */
|
|
int (*set_event)(struct devfreq_event_dev *edev);
|
|
int (*get_event)(struct devfreq_event_dev *edev,
|
|
struct devfreq_event_data *edata);
|
|
};
|
|
|
|
/**
|
|
* struct devfreq_event_desc - the descriptor of devfreq-event device
|
|
*
|
|
* @name : the name of devfreq-event device.
|
|
* @driver_data : the private data for devfreq-event driver.
|
|
* @ops : the operation to control devfreq-event device.
|
|
*
|
|
* Each devfreq-event device is described with a this structure.
|
|
* This structure contains the various data for devfreq-event device.
|
|
*/
|
|
struct devfreq_event_desc {
|
|
const char *name;
|
|
void *driver_data;
|
|
|
|
const struct devfreq_event_ops *ops;
|
|
};
|
|
|
|
#if defined(CONFIG_PM_DEVFREQ_EVENT)
|
|
extern int devfreq_event_enable_edev(struct devfreq_event_dev *edev);
|
|
extern int devfreq_event_disable_edev(struct devfreq_event_dev *edev);
|
|
extern bool devfreq_event_is_enabled(struct devfreq_event_dev *edev);
|
|
extern int devfreq_event_set_event(struct devfreq_event_dev *edev);
|
|
extern int devfreq_event_get_event(struct devfreq_event_dev *edev,
|
|
struct devfreq_event_data *edata);
|
|
extern int devfreq_event_reset_event(struct devfreq_event_dev *edev);
|
|
extern struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
|
|
struct device *dev, int index);
|
|
extern int devfreq_event_get_edev_count(struct device *dev);
|
|
extern struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
|
|
struct devfreq_event_desc *desc);
|
|
extern int devfreq_event_remove_edev(struct devfreq_event_dev *edev);
|
|
extern struct devfreq_event_dev *devm_devfreq_event_add_edev(struct device *dev,
|
|
struct devfreq_event_desc *desc);
|
|
extern void devm_devfreq_event_remove_edev(struct device *dev,
|
|
struct devfreq_event_dev *edev);
|
|
static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
|
|
{
|
|
return edev->desc->driver_data;
|
|
}
|
|
#else
|
|
static inline int devfreq_event_enable_edev(struct devfreq_event_dev *edev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int devfreq_event_disable_edev(struct devfreq_event_dev *edev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline bool devfreq_event_is_enabled(struct devfreq_event_dev *edev)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline int devfreq_event_set_event(struct devfreq_event_dev *edev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int devfreq_event_get_event(struct devfreq_event_dev *edev,
|
|
struct devfreq_event_data *edata)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int devfreq_event_reset_event(struct devfreq_event_dev *edev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
|
|
struct device *dev, int index)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
static inline int devfreq_event_get_edev_count(struct device *dev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
|
|
struct devfreq_event_desc *desc)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
static inline int devfreq_event_remove_edev(struct devfreq_event_dev *edev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline struct devfreq_event_dev *devm_devfreq_event_add_edev(
|
|
struct device *dev,
|
|
struct devfreq_event_desc *desc)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
static inline void devm_devfreq_event_remove_edev(struct device *dev,
|
|
struct devfreq_event_dev *edev)
|
|
{
|
|
}
|
|
|
|
static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif /* CONFIG_PM_DEVFREQ_EVENT */
|
|
|
|
#endif /* __LINUX_DEVFREQ_EVENT_H__ */
|