mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-14 07:44:21 +08:00
e9654659fe
After recent changes, it is only used for printing a debug message in __thermal_cdev_update() which arguably is not worth preserving. Drop it along with the dev_dbg() statement using it. Link: https://lore.kernel.org/linux-pm/4a8d8f5a-122d-4c26-b8d6-76a65e42216b@linaro.org Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://patch.msgid.link/4934182.GXAFRqVoOG@rjwysocki.net
291 lines
10 KiB
C
291 lines
10 KiB
C
/* 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"
|
|
|
|
struct thermal_attr {
|
|
struct device_attribute attr;
|
|
char name[THERMAL_NAME_LENGTH];
|
|
};
|
|
|
|
struct thermal_trip_attrs {
|
|
struct thermal_attr type;
|
|
struct thermal_attr temp;
|
|
struct thermal_attr hyst;
|
|
};
|
|
|
|
struct thermal_trip_desc {
|
|
struct thermal_trip trip;
|
|
struct thermal_trip_attrs trip_attrs;
|
|
struct list_head notify_list_node;
|
|
int notify_temp;
|
|
int threshold;
|
|
};
|
|
|
|
/**
|
|
* struct thermal_governor - structure that holds thermal governor information
|
|
* @name: name of the governor
|
|
* @bind_to_tz: callback called when binding to a thermal zone. If it
|
|
* returns 0, the governor is bound to the thermal zone,
|
|
* otherwise it fails.
|
|
* @unbind_from_tz: callback called when a governor is unbound from a
|
|
* thermal zone.
|
|
* @trip_crossed: called for trip points that have just been crossed
|
|
* @manage: called on thermal zone temperature updates
|
|
* @update_tz: callback called when thermal zone internals have changed, e.g.
|
|
* thermal cooling instance was added/removed
|
|
* @governor_list: node in thermal_governor_list (in thermal_core.c)
|
|
*/
|
|
struct thermal_governor {
|
|
const char *name;
|
|
int (*bind_to_tz)(struct thermal_zone_device *tz);
|
|
void (*unbind_from_tz)(struct thermal_zone_device *tz);
|
|
void (*trip_crossed)(struct thermal_zone_device *tz,
|
|
const struct thermal_trip *trip,
|
|
bool crossed_up);
|
|
void (*manage)(struct thermal_zone_device *tz);
|
|
void (*update_tz)(struct thermal_zone_device *tz,
|
|
enum thermal_notify_event reason);
|
|
struct list_head governor_list;
|
|
};
|
|
|
|
/**
|
|
* struct thermal_zone_device - structure for a thermal zone
|
|
* @id: unique id number for each thermal zone
|
|
* @type: the thermal zone device type
|
|
* @device: &struct device for this thermal zone
|
|
* @removal: removal completion
|
|
* @resume: resume completion
|
|
* @mode: current mode of this thermal zone
|
|
* @devdata: private pointer for device private data
|
|
* @num_trips: number of trip points the thermal zone supports
|
|
* @passive_delay_jiffies: number of jiffies to wait between polls when
|
|
* performing passive cooling.
|
|
* @polling_delay_jiffies: number of jiffies to wait between polls when
|
|
* checking whether trip points have been crossed (0 for
|
|
* interrupt driven systems)
|
|
* @recheck_delay_jiffies: delay after a failed attempt to determine the zone
|
|
* temperature before trying again
|
|
* @temperature: current temperature. This is only for core code,
|
|
* drivers should use thermal_zone_get_temp() to get the
|
|
* current temperature
|
|
* @last_temperature: previous temperature read
|
|
* @emul_temperature: emulated temperature when using CONFIG_THERMAL_EMULATION
|
|
* @passive: 1 if you've crossed a passive trip point, 0 otherwise.
|
|
* @prev_low_trip: the low current temperature if you've crossed a passive
|
|
trip point.
|
|
* @prev_high_trip: the above current temperature if you've crossed a
|
|
passive trip point.
|
|
* @need_update: if equals 1, thermal_zone_device_update needs to be invoked.
|
|
* @ops: operations this &thermal_zone_device supports
|
|
* @tzp: thermal zone parameters
|
|
* @governor: pointer to the governor for this thermal zone
|
|
* @governor_data: private pointer for governor data
|
|
* @thermal_instances: list of &struct thermal_instance of this thermal zone
|
|
* @ida: &struct ida to generate unique id for this zone's cooling
|
|
* devices
|
|
* @lock: lock to protect thermal_instances list
|
|
* @node: node in thermal_tz_list (in thermal_core.c)
|
|
* @poll_queue: delayed work for polling
|
|
* @notify_event: Last notification event
|
|
* @suspended: thermal zone suspend indicator
|
|
* @resuming: indicates whether or not thermal zone resume is in progress
|
|
* @trips: array of struct thermal_trip objects
|
|
*/
|
|
struct thermal_zone_device {
|
|
int id;
|
|
char type[THERMAL_NAME_LENGTH];
|
|
struct device device;
|
|
struct completion removal;
|
|
struct completion resume;
|
|
struct attribute_group trips_attribute_group;
|
|
enum thermal_device_mode mode;
|
|
void *devdata;
|
|
int num_trips;
|
|
unsigned long passive_delay_jiffies;
|
|
unsigned long polling_delay_jiffies;
|
|
unsigned long recheck_delay_jiffies;
|
|
int temperature;
|
|
int last_temperature;
|
|
int emul_temperature;
|
|
int passive;
|
|
int prev_low_trip;
|
|
int prev_high_trip;
|
|
atomic_t need_update;
|
|
struct thermal_zone_device_ops ops;
|
|
struct thermal_zone_params *tzp;
|
|
struct thermal_governor *governor;
|
|
void *governor_data;
|
|
struct list_head thermal_instances;
|
|
struct ida ida;
|
|
struct mutex lock;
|
|
struct list_head node;
|
|
struct delayed_work poll_queue;
|
|
enum thermal_notify_event notify_event;
|
|
bool suspended;
|
|
bool resuming;
|
|
#ifdef CONFIG_THERMAL_DEBUGFS
|
|
struct thermal_debugfs *debugfs;
|
|
#endif
|
|
struct thermal_trip_desc trips[] __counted_by(num_trips);
|
|
};
|
|
|
|
/* Initial thermal zone temperature. */
|
|
#define THERMAL_TEMP_INIT INT_MIN
|
|
|
|
/*
|
|
* Default and maximum delay after a failed thermal zone temperature check
|
|
* before attempting to check it again (in jiffies).
|
|
*/
|
|
#define THERMAL_RECHECK_DELAY msecs_to_jiffies(250)
|
|
#define THERMAL_MAX_RECHECK_DELAY (120 * HZ)
|
|
|
|
/* 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);
|
|
|
|
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);
|
|
|
|
/*
|
|
* 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_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_desc(__tz, __td) \
|
|
for (__td = __tz->trips; __td - __tz->trips < __tz->num_trips; __td++)
|
|
|
|
#define trip_to_trip_desc(__trip) \
|
|
container_of(__trip, struct thermal_trip_desc, trip)
|
|
|
|
const char *thermal_trip_type_name(enum thermal_trip_type trip_type);
|
|
|
|
void thermal_zone_set_trips(struct thermal_zone_device *tz, int low, int high);
|
|
int thermal_zone_trip_id(const struct thermal_zone_device *tz,
|
|
const struct thermal_trip *trip);
|
|
int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
|
|
void thermal_zone_trip_down(struct thermal_zone_device *tz,
|
|
const struct thermal_trip *trip);
|
|
void thermal_zone_set_trip_hyst(struct thermal_zone_device *tz,
|
|
struct thermal_trip *trip, int hyst);
|
|
|
|
/* sysfs I/F */
|
|
int thermal_zone_create_device_groups(struct thermal_zone_device *tz);
|
|
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__ */
|