You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
500 lines
17 KiB
500 lines
17 KiB
/* |
|
* thermal.h ($Revision: 0 $) |
|
* |
|
* Copyright (C) 2008 Intel Corp |
|
* Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> |
|
* Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> |
|
* |
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
|
* This program is free software; you can redistribute it and/or modify |
|
* it under the terms of the GNU General Public License as published by |
|
* the Free Software Foundation; version 2 of the License. |
|
* |
|
* 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. |
|
* |
|
* You should have received a copy of the GNU General Public License along |
|
* with this program; if not, write to the Free Software Foundation, Inc., |
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
|
* |
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
|
*/ |
|
|
|
#ifndef __THERMAL_H__ |
|
#define __THERMAL_H__ |
|
|
|
#include <linux/of.h> |
|
#include <linux/idr.h> |
|
#include <linux/device.h> |
|
#include <linux/workqueue.h> |
|
#include <uapi/linux/thermal.h> |
|
|
|
#define THERMAL_TRIPS_NONE -1 |
|
#define THERMAL_MAX_TRIPS 12 |
|
|
|
/* invalid cooling state */ |
|
#define THERMAL_CSTATE_INVALID -1UL |
|
|
|
/* No upper/lower limit requirement */ |
|
#define THERMAL_NO_LIMIT ((u32)~0) |
|
|
|
/* Default weight of a bound cooling device */ |
|
#define THERMAL_WEIGHT_DEFAULT 0 |
|
|
|
/* use value, which < 0K, to indicate an invalid/uninitialized temperature */ |
|
#define THERMAL_TEMP_INVALID -274000 |
|
|
|
/* Unit conversion macros */ |
|
#define DECI_KELVIN_TO_CELSIUS(t) ({ \ |
|
long _t = (t); \ |
|
((_t-2732 >= 0) ? (_t-2732+5)/10 : (_t-2732-5)/10); \ |
|
}) |
|
#define CELSIUS_TO_DECI_KELVIN(t) ((t)*10+2732) |
|
#define DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, off) (((t) - (off)) * 100) |
|
#define DECI_KELVIN_TO_MILLICELSIUS(t) DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, 2732) |
|
#define MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, off) (((t) / 100) + (off)) |
|
#define MILLICELSIUS_TO_DECI_KELVIN(t) MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, 2732) |
|
|
|
/* 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_BACKWARD_COMPATIBLE) |
|
#define DEFAULT_THERMAL_GOVERNOR "backward_compatible" |
|
#endif |
|
|
|
struct thermal_zone_device; |
|
struct thermal_cooling_device; |
|
struct thermal_instance; |
|
|
|
enum thermal_device_mode { |
|
THERMAL_DEVICE_DISABLED = 0, |
|
THERMAL_DEVICE_ENABLED, |
|
}; |
|
|
|
enum thermal_trip_type { |
|
THERMAL_TRIP_ACTIVE = 0, |
|
THERMAL_TRIP_PASSIVE, |
|
THERMAL_TRIP_HOT, |
|
THERMAL_TRIP_CRITICAL, |
|
}; |
|
|
|
enum thermal_trend { |
|
THERMAL_TREND_STABLE, /* temperature is stable */ |
|
THERMAL_TREND_RAISING, /* temperature is raising */ |
|
THERMAL_TREND_DROPPING, /* temperature is dropping */ |
|
THERMAL_TREND_RAISE_FULL, /* apply highest cooling action */ |
|
THERMAL_TREND_DROP_FULL, /* apply lowest cooling action */ |
|
}; |
|
|
|
struct thermal_zone_device_ops { |
|
int (*bind) (struct thermal_zone_device *, |
|
struct thermal_cooling_device *); |
|
int (*unbind) (struct thermal_zone_device *, |
|
struct thermal_cooling_device *); |
|
int (*get_temp) (struct thermal_zone_device *, int *); |
|
int (*get_mode) (struct thermal_zone_device *, |
|
enum thermal_device_mode *); |
|
int (*set_mode) (struct thermal_zone_device *, |
|
enum thermal_device_mode); |
|
int (*get_trip_type) (struct thermal_zone_device *, int, |
|
enum thermal_trip_type *); |
|
int (*get_trip_temp) (struct thermal_zone_device *, int, int *); |
|
int (*set_trip_temp) (struct thermal_zone_device *, int, int); |
|
int (*get_trip_hyst) (struct thermal_zone_device *, int, int *); |
|
int (*set_trip_hyst) (struct thermal_zone_device *, int, int); |
|
int (*get_crit_temp) (struct thermal_zone_device *, int *); |
|
int (*set_emul_temp) (struct thermal_zone_device *, int); |
|
int (*get_trend) (struct thermal_zone_device *, int, |
|
enum thermal_trend *); |
|
int (*notify) (struct thermal_zone_device *, int, |
|
enum thermal_trip_type); |
|
}; |
|
|
|
struct thermal_cooling_device_ops { |
|
int (*get_max_state) (struct thermal_cooling_device *, unsigned long *); |
|
int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *); |
|
int (*set_cur_state) (struct thermal_cooling_device *, unsigned long); |
|
int (*get_requested_power)(struct thermal_cooling_device *, |
|
struct thermal_zone_device *, u32 *); |
|
int (*state2power)(struct thermal_cooling_device *, |
|
struct thermal_zone_device *, unsigned long, u32 *); |
|
int (*power2state)(struct thermal_cooling_device *, |
|
struct thermal_zone_device *, u32, unsigned long *); |
|
}; |
|
|
|
struct thermal_cooling_device { |
|
int id; |
|
char type[THERMAL_NAME_LENGTH]; |
|
struct device device; |
|
struct device_node *np; |
|
void *devdata; |
|
const struct thermal_cooling_device_ops *ops; |
|
bool updated; /* true if the cooling device does not need update */ |
|
struct mutex lock; /* protect thermal_instances list */ |
|
struct list_head thermal_instances; |
|
struct list_head node; |
|
}; |
|
|
|
struct thermal_attr { |
|
struct device_attribute attr; |
|
char name[THERMAL_NAME_LENGTH]; |
|
}; |
|
|
|
/** |
|
* 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 |
|
* @trip_temp_attrs: attributes for trip points for sysfs: trip temperature |
|
* @trip_type_attrs: attributes for trip points for sysfs: trip type |
|
* @trip_hyst_attrs: attributes for trip points for sysfs: trip hysteresis |
|
* @devdata: private pointer for device private data |
|
* @trips: number of trip points the thermal zone supports |
|
* @trips_disabled; bitmap for disabled trips |
|
* @passive_delay: number of milliseconds to wait between polls when |
|
* performing passive cooling. |
|
* @polling_delay: number of milliseconds to wait between polls when |
|
* checking whether trip points have been crossed (0 for |
|
* interrupt driven systems) |
|
* @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. |
|
* @forced_passive: If > 0, temperature at which to switch on all ACPI |
|
* processor cooling devices. Currently only used by the |
|
* step-wise governor. |
|
* @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 |
|
* @idr: &struct idr 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 |
|
*/ |
|
struct thermal_zone_device { |
|
int id; |
|
char type[THERMAL_NAME_LENGTH]; |
|
struct device device; |
|
struct thermal_attr *trip_temp_attrs; |
|
struct thermal_attr *trip_type_attrs; |
|
struct thermal_attr *trip_hyst_attrs; |
|
void *devdata; |
|
int trips; |
|
unsigned long trips_disabled; /* bitmap for disabled trips */ |
|
int passive_delay; |
|
int polling_delay; |
|
int temperature; |
|
int last_temperature; |
|
int emul_temperature; |
|
int passive; |
|
unsigned int forced_passive; |
|
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 idr idr; |
|
struct mutex lock; |
|
struct list_head node; |
|
struct delayed_work poll_queue; |
|
}; |
|
|
|
/** |
|
* 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. |
|
* @throttle: callback called for every trip point even if temperature is |
|
* below the trip point temperature |
|
* @governor_list: node in thermal_governor_list (in thermal_core.c) |
|
*/ |
|
struct thermal_governor { |
|
char name[THERMAL_NAME_LENGTH]; |
|
int (*bind_to_tz)(struct thermal_zone_device *tz); |
|
void (*unbind_from_tz)(struct thermal_zone_device *tz); |
|
int (*throttle)(struct thermal_zone_device *tz, int trip); |
|
struct list_head governor_list; |
|
}; |
|
|
|
/* Structure that holds binding parameters for a zone */ |
|
struct thermal_bind_params { |
|
struct thermal_cooling_device *cdev; |
|
|
|
/* |
|
* This is a measure of 'how effectively these devices can |
|
* cool 'this' thermal zone. It shall be determined by |
|
* platform characterization. This value is relative to the |
|
* rest of the weights so a cooling device whose weight is |
|
* double that of another cooling device is twice as |
|
* effective. See Documentation/thermal/sysfs-api.txt for more |
|
* information. |
|
*/ |
|
int weight; |
|
|
|
/* |
|
* This is a bit mask that gives the binding relation between this |
|
* thermal zone and cdev, for a particular trip point. |
|
* See Documentation/thermal/sysfs-api.txt for more information. |
|
*/ |
|
int trip_mask; |
|
|
|
/* |
|
* This is an array of cooling state limits. Must have exactly |
|
* 2 * thermal_zone.number_of_trip_points. It is an array consisting |
|
* of tuples <lower-state upper-state> of state limits. Each trip |
|
* will be associated with one state limit tuple when binding. |
|
* A NULL pointer means <THERMAL_NO_LIMITS THERMAL_NO_LIMITS> |
|
* on all trips. |
|
*/ |
|
unsigned long *binding_limits; |
|
int (*match) (struct thermal_zone_device *tz, |
|
struct thermal_cooling_device *cdev); |
|
}; |
|
|
|
/* Structure to define Thermal Zone parameters */ |
|
struct thermal_zone_params { |
|
char governor_name[THERMAL_NAME_LENGTH]; |
|
|
|
/* |
|
* a boolean to indicate if the thermal to hwmon sysfs interface |
|
* is required. when no_hwmon == false, a hwmon sysfs interface |
|
* will be created. when no_hwmon == true, nothing will be done |
|
*/ |
|
bool no_hwmon; |
|
|
|
int num_tbps; /* Number of tbp entries */ |
|
struct thermal_bind_params *tbp; |
|
|
|
/* |
|
* Sustainable power (heat) that this thermal zone can dissipate in |
|
* mW |
|
*/ |
|
u32 sustainable_power; |
|
|
|
/* |
|
* Proportional parameter of the PID controller when |
|
* overshooting (i.e., when temperature is below the target) |
|
*/ |
|
s32 k_po; |
|
|
|
/* |
|
* Proportional parameter of the PID controller when |
|
* undershooting |
|
*/ |
|
s32 k_pu; |
|
|
|
/* Integral parameter of the PID controller */ |
|
s32 k_i; |
|
|
|
/* Derivative parameter of the PID controller */ |
|
s32 k_d; |
|
|
|
/* threshold below which the error is no longer accumulated */ |
|
s32 integral_cutoff; |
|
|
|
/* |
|
* @slope: slope of a linear temperature adjustment curve. |
|
* Used by thermal zone drivers. |
|
*/ |
|
int slope; |
|
/* |
|
* @offset: offset of a linear temperature adjustment curve. |
|
* Used by thermal zone drivers (default 0). |
|
*/ |
|
int offset; |
|
}; |
|
|
|
struct thermal_genl_event { |
|
u32 orig; |
|
enum events event; |
|
}; |
|
|
|
/** |
|
* struct thermal_zone_of_device_ops - scallbacks for handling DT based zones |
|
* |
|
* Mandatory: |
|
* @get_temp: a pointer to a function that reads the sensor temperature. |
|
* |
|
* Optional: |
|
* @get_trend: a pointer to a function that reads the sensor temperature trend. |
|
* @set_emul_temp: a pointer to a function that sets sensor emulated |
|
* temperature. |
|
*/ |
|
struct thermal_zone_of_device_ops { |
|
int (*get_temp)(void *, int *); |
|
int (*get_trend)(void *, long *); |
|
int (*set_emul_temp)(void *, int); |
|
}; |
|
|
|
/** |
|
* struct thermal_trip - representation of a point in temperature domain |
|
* @np: pointer to struct device_node that this trip point was created from |
|
* @temperature: temperature value in miliCelsius |
|
* @hysteresis: relative hysteresis in miliCelsius |
|
* @type: trip point type |
|
*/ |
|
|
|
struct thermal_trip { |
|
struct device_node *np; |
|
unsigned long int temperature; |
|
unsigned long int hysteresis; |
|
enum thermal_trip_type type; |
|
}; |
|
|
|
/* Function declarations */ |
|
#ifdef CONFIG_THERMAL_OF |
|
struct thermal_zone_device * |
|
thermal_zone_of_sensor_register(struct device *dev, int id, void *data, |
|
const struct thermal_zone_of_device_ops *ops); |
|
void thermal_zone_of_sensor_unregister(struct device *dev, |
|
struct thermal_zone_device *tz); |
|
#else |
|
static inline struct thermal_zone_device * |
|
thermal_zone_of_sensor_register(struct device *dev, int id, void *data, |
|
const struct thermal_zone_of_device_ops *ops) |
|
{ |
|
return ERR_PTR(-ENODEV); |
|
} |
|
|
|
static inline |
|
void thermal_zone_of_sensor_unregister(struct device *dev, |
|
struct thermal_zone_device *tz) |
|
{ |
|
} |
|
|
|
#endif |
|
|
|
#if IS_ENABLED(CONFIG_THERMAL) |
|
static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev) |
|
{ |
|
return cdev->ops->get_requested_power && cdev->ops->state2power && |
|
cdev->ops->power2state; |
|
} |
|
|
|
int power_actor_get_max_power(struct thermal_cooling_device *, |
|
struct thermal_zone_device *tz, u32 *max_power); |
|
int power_actor_get_min_power(struct thermal_cooling_device *, |
|
struct thermal_zone_device *tz, u32 *min_power); |
|
int power_actor_set_power(struct thermal_cooling_device *, |
|
struct thermal_instance *, u32); |
|
struct thermal_zone_device *thermal_zone_device_register(const char *, int, int, |
|
void *, struct thermal_zone_device_ops *, |
|
struct thermal_zone_params *, int, int); |
|
void thermal_zone_device_unregister(struct thermal_zone_device *); |
|
|
|
int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, |
|
struct thermal_cooling_device *, |
|
unsigned long, unsigned long, |
|
unsigned int); |
|
int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, |
|
struct thermal_cooling_device *); |
|
void thermal_zone_device_update(struct thermal_zone_device *); |
|
|
|
struct thermal_cooling_device *thermal_cooling_device_register(char *, void *, |
|
const struct thermal_cooling_device_ops *); |
|
struct thermal_cooling_device * |
|
thermal_of_cooling_device_register(struct device_node *np, char *, void *, |
|
const struct thermal_cooling_device_ops *); |
|
void thermal_cooling_device_unregister(struct thermal_cooling_device *); |
|
struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name); |
|
int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp); |
|
|
|
int get_tz_trend(struct thermal_zone_device *, int); |
|
struct thermal_instance *get_thermal_instance(struct thermal_zone_device *, |
|
struct thermal_cooling_device *, int); |
|
void thermal_cdev_update(struct thermal_cooling_device *); |
|
void thermal_notify_framework(struct thermal_zone_device *, int); |
|
#else |
|
static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev) |
|
{ return false; } |
|
static inline int power_actor_get_max_power(struct thermal_cooling_device *cdev, |
|
struct thermal_zone_device *tz, u32 *max_power) |
|
{ return 0; } |
|
static inline int power_actor_get_min_power(struct thermal_cooling_device *cdev, |
|
struct thermal_zone_device *tz, |
|
u32 *min_power) |
|
{ return -ENODEV; } |
|
static inline int power_actor_set_power(struct thermal_cooling_device *cdev, |
|
struct thermal_instance *tz, u32 power) |
|
{ return 0; } |
|
static inline struct thermal_zone_device *thermal_zone_device_register( |
|
const char *type, int trips, int mask, void *devdata, |
|
struct thermal_zone_device_ops *ops, |
|
const struct thermal_zone_params *tzp, |
|
int passive_delay, int polling_delay) |
|
{ return ERR_PTR(-ENODEV); } |
|
static inline void thermal_zone_device_unregister( |
|
struct thermal_zone_device *tz) |
|
{ } |
|
static inline int thermal_zone_bind_cooling_device( |
|
struct thermal_zone_device *tz, int trip, |
|
struct thermal_cooling_device *cdev, |
|
unsigned long upper, unsigned long lower, |
|
unsigned int weight) |
|
{ return -ENODEV; } |
|
static inline int thermal_zone_unbind_cooling_device( |
|
struct thermal_zone_device *tz, int trip, |
|
struct thermal_cooling_device *cdev) |
|
{ return -ENODEV; } |
|
static inline void thermal_zone_device_update(struct thermal_zone_device *tz) |
|
{ } |
|
static inline struct thermal_cooling_device * |
|
thermal_cooling_device_register(char *type, void *devdata, |
|
const struct thermal_cooling_device_ops *ops) |
|
{ return ERR_PTR(-ENODEV); } |
|
static inline struct thermal_cooling_device * |
|
thermal_of_cooling_device_register(struct device_node *np, |
|
char *type, void *devdata, const struct thermal_cooling_device_ops *ops) |
|
{ return ERR_PTR(-ENODEV); } |
|
static inline void thermal_cooling_device_unregister( |
|
struct thermal_cooling_device *cdev) |
|
{ } |
|
static inline struct thermal_zone_device *thermal_zone_get_zone_by_name( |
|
const char *name) |
|
{ return ERR_PTR(-ENODEV); } |
|
static inline int thermal_zone_get_temp( |
|
struct thermal_zone_device *tz, int *temp) |
|
{ return -ENODEV; } |
|
static inline int get_tz_trend(struct thermal_zone_device *tz, int trip) |
|
{ return -ENODEV; } |
|
static inline struct thermal_instance * |
|
get_thermal_instance(struct thermal_zone_device *tz, |
|
struct thermal_cooling_device *cdev, int trip) |
|
{ return ERR_PTR(-ENODEV); } |
|
static inline void thermal_cdev_update(struct thermal_cooling_device *cdev) |
|
{ } |
|
static inline void thermal_notify_framework(struct thermal_zone_device *tz, |
|
int trip) |
|
{ } |
|
#endif /* CONFIG_THERMAL */ |
|
|
|
#if defined(CONFIG_NET) && IS_ENABLED(CONFIG_THERMAL) |
|
extern int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
|
enum events event); |
|
#else |
|
static inline int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
|
enum events event) |
|
{ |
|
return 0; |
|
} |
|
#endif |
|
|
|
#endif /* __THERMAL_H__ */
|
|
|