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/* SPDX-License-Identifier: GPL-2.0 */
/*
* thermal_core.h
*
* Copyright (C) 2012 Intel Corp
* Author: Durgadoss R <durgadoss.r@intel.com>
*/
#ifndef __THERMAL_CORE_H__
#define __THERMAL_CORE_H__
#include <linux/device.h>
#include <linux/thermal.h>
#include "thermal_netlink.h"
#include "thermal_debugfs.h"
/* Default Thermal Governor */
#if defined(CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE)
#define DEFAULT_THERMAL_GOVERNOR "step_wise"
#elif defined(CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE)
#define DEFAULT_THERMAL_GOVERNOR "fair_share"
#elif defined(CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE)
#define DEFAULT_THERMAL_GOVERNOR "user_space"
#elif defined(CONFIG_THERMAL_DEFAULT_GOV_POWER_ALLOCATOR)
#define DEFAULT_THERMAL_GOVERNOR "power_allocator"
#elif defined(CONFIG_THERMAL_DEFAULT_GOV_BANG_BANG)
#define DEFAULT_THERMAL_GOVERNOR "bang_bang"
#endif
/* Initial state of a cooling device during binding */
#define THERMAL_NO_TARGET -1UL
/* Init section thermal table */
extern struct thermal_governor *__governor_thermal_table[];
extern struct thermal_governor *__governor_thermal_table_end[];
#define THERMAL_TABLE_ENTRY(table, name) \
static typeof(name) *__thermal_table_entry_##name \
__used __section("__" #table "_thermal_table") = &name
#define THERMAL_GOVERNOR_DECLARE(name) THERMAL_TABLE_ENTRY(governor, name)
#define for_each_governor_table(__governor) \
for (__governor = __governor_thermal_table; \
__governor < __governor_thermal_table_end; \
__governor++)
int for_each_thermal_zone(int (*cb)(struct thermal_zone_device *, void *),
void *);
int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *,
void *), void *);
int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *),
void *thermal_governor);
struct thermal_zone_device *thermal_zone_get_by_id(int id);
struct thermal_attr {
struct device_attribute attr;
char name[THERMAL_NAME_LENGTH];
};
static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
{
return cdev->ops->get_requested_power && cdev->ops->state2power &&
cdev->ops->power2state;
}
void thermal_cdev_update(struct thermal_cooling_device *);
void __thermal_cdev_update(struct thermal_cooling_device *cdev);
int get_tz_trend(struct thermal_zone_device *tz, const struct thermal_trip *trip);
struct thermal_instance *
get_thermal_instance(struct thermal_zone_device *tz,
struct thermal_cooling_device *cdev,
int trip);
/*
* This structure is used to describe the behavior of
* a certain cooling device on a certain trip point
* in a certain thermal zone
*/
struct thermal_instance {
int id;
char name[THERMAL_NAME_LENGTH];
struct thermal_zone_device *tz;
struct thermal_cooling_device *cdev;
const struct thermal_trip *trip;
bool initialized;
unsigned long upper; /* Highest cooling state for this trip point */
unsigned long lower; /* Lowest cooling state for this trip point */
unsigned long target; /* expected cooling state */
char attr_name[THERMAL_NAME_LENGTH];
struct device_attribute attr;
char weight_attr_name[THERMAL_NAME_LENGTH];
struct device_attribute weight_attr;
struct list_head tz_node; /* node in tz->thermal_instances */
struct list_head cdev_node; /* node in cdev->thermal_instances */
unsigned int weight; /* The weight of the cooling device */
bool upper_no_limit;
};
#define to_thermal_zone(_dev) \
container_of(_dev, struct thermal_zone_device, device)
#define to_cooling_device(_dev) \
container_of(_dev, struct thermal_cooling_device, device)
int thermal_register_governor(struct thermal_governor *);
void thermal_unregister_governor(struct thermal_governor *);
int thermal_zone_device_set_policy(struct thermal_zone_device *, char *);
int thermal_build_list_of_policies(char *buf);
void __thermal_zone_device_update(struct thermal_zone_device *tz,
enum thermal_notify_event event);
void thermal_zone_device_critical_reboot(struct thermal_zone_device *tz);
void thermal_governor_update_tz(struct thermal_zone_device *tz,
enum thermal_notify_event reason);
/* Helpers */
#define for_each_trip(__tz, __trip) \
for (__trip = __tz->trips; __trip - __tz->trips < __tz->num_trips; __trip++)
void __thermal_zone_set_trips(struct thermal_zone_device *tz);
int thermal_zone_trip_id(const struct thermal_zone_device *tz,
const struct thermal_trip *trip);
void thermal_zone_trip_updated(struct thermal_zone_device *tz,
const struct thermal_trip *trip);
int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
/* sysfs I/F */
int thermal_zone_create_device_groups(struct thermal_zone_device *, int);
void thermal_zone_destroy_device_groups(struct thermal_zone_device *);
void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *);
void thermal_cooling_device_destroy_sysfs(struct thermal_cooling_device *cdev);
void thermal_cooling_device_stats_reinit(struct thermal_cooling_device *cdev);
/* used only at binding time */
ssize_t trip_point_show(struct device *, struct device_attribute *, char *);
ssize_t weight_show(struct device *, struct device_attribute *, char *);
ssize_t weight_store(struct device *, struct device_attribute *, const char *,
size_t);
#ifdef CONFIG_THERMAL_STATISTICS
void thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev,
unsigned long new_state);
#else
static inline void
thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev,
unsigned long new_state) {}
#endif /* CONFIG_THERMAL_STATISTICS */
/* device tree support */
int thermal_zone_device_is_enabled(struct thermal_zone_device *tz);
#endif /* __THERMAL_CORE_H__ */
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