diff options
Diffstat (limited to 'include/linux/thermal.h')
| -rw-r--r-- | include/linux/thermal.h | 390 |
1 files changed, 144 insertions, 246 deletions
diff --git a/include/linux/thermal.h b/include/linux/thermal.h index d07ea27e72a9..0b5ed6821080 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -17,9 +17,6 @@ #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 @@ -35,14 +32,13 @@ struct thermal_zone_device; struct thermal_cooling_device; struct thermal_instance; +struct thermal_debugfs; struct thermal_attr; 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 */ }; /* Thermal notification reason */ @@ -56,29 +52,63 @@ enum thermal_notify_event { THERMAL_DEVICE_POWER_CAPABILITY_CHANGED, /* power capability changed */ THERMAL_TABLE_CHANGED, /* Thermal table(s) changed */ THERMAL_EVENT_KEEP_ALIVE, /* Request for user space handler to respond */ + THERMAL_TZ_BIND_CDEV, /* Cooling dev is bind to the thermal zone */ + THERMAL_TZ_UNBIND_CDEV, /* Cooling dev is unbind from the thermal zone */ + THERMAL_INSTANCE_WEIGHT_CHANGED, /* Thermal instance weight changed */ + THERMAL_TZ_RESUME, /* Thermal zone is resuming after system sleep */ + THERMAL_TZ_ADD_THRESHOLD, /* Threshold added */ + THERMAL_TZ_DEL_THRESHOLD, /* Threshold deleted */ + THERMAL_TZ_FLUSH_THRESHOLDS, /* All thresholds deleted */ +}; + +/** + * struct thermal_trip - representation of a point in temperature domain + * @temperature: temperature value in miliCelsius + * @hysteresis: relative hysteresis in miliCelsius + * @type: trip point type + * @priv: pointer to driver data associated with this trip + * @flags: flags representing binary properties of the trip + */ +struct thermal_trip { + int temperature; + int hysteresis; + enum thermal_trip_type type; + u8 flags; + void *priv; +}; + +#define THERMAL_TRIP_FLAG_RW_TEMP BIT(0) +#define THERMAL_TRIP_FLAG_RW_HYST BIT(1) + +#define THERMAL_TRIP_FLAG_RW (THERMAL_TRIP_FLAG_RW_TEMP | \ + THERMAL_TRIP_FLAG_RW_HYST) + +#define THERMAL_TRIP_PRIV_TO_INT(_val_) (uintptr_t)(_val_) +#define THERMAL_INT_TO_TRIP_PRIV(_val_) (void *)(uintptr_t)(_val_) + +struct cooling_spec { + unsigned long upper; /* Highest cooling state */ + unsigned long lower; /* Lowest cooling state */ + unsigned int weight; /* Cooling device weight */ }; 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 *); + bool (*should_bind) (struct thermal_zone_device *, + const struct thermal_trip *, + struct thermal_cooling_device *, + struct cooling_spec *); int (*get_temp) (struct thermal_zone_device *, int *); int (*set_trips) (struct thermal_zone_device *, int, int); int (*change_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 (*set_trip_temp) (struct thermal_zone_device *, + const struct thermal_trip *, 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); + int (*get_trend) (struct thermal_zone_device *, + const struct thermal_trip *, enum thermal_trend *); + void (*hot)(struct thermal_zone_device *); + void (*critical)(struct thermal_zone_device *); }; struct thermal_cooling_device_ops { @@ -92,7 +122,8 @@ struct thermal_cooling_device_ops { struct thermal_cooling_device { int id; - char type[THERMAL_NAME_LENGTH]; + const char *type; + unsigned long max_state; struct device device; struct device_node *np; void *devdata; @@ -102,143 +133,17 @@ struct thermal_cooling_device { struct mutex lock; /* protect thermal_instances list */ struct list_head thermal_instances; struct list_head node; +#ifdef CONFIG_THERMAL_DEBUGFS + struct thermal_debugfs *debugfs; +#endif }; -/** - * 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 - * @mode: current mode of this thermal zone - * @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. - * @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. - * @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 - * @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 - */ -struct thermal_zone_device { - int id; - char type[THERMAL_NAME_LENGTH]; - struct device device; - struct attribute_group trips_attribute_group; - struct thermal_attr *trip_temp_attrs; - struct thermal_attr *trip_type_attrs; - struct thermal_attr *trip_hyst_attrs; - enum thermal_device_mode mode; - 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; - int prev_low_trip; - int prev_high_trip; - 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 ida ida; - struct mutex lock; - struct list_head node; - struct delayed_work poll_queue; - enum thermal_notify_event notify_event; -}; - -/** - * 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/driver-api/thermal/sysfs-api.rst 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/driver-api/thermal/sysfs-api.rst 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); -}; +DEFINE_GUARD(cooling_dev, struct thermal_cooling_device *, mutex_lock(&_T->lock), + mutex_unlock(&_T->lock)) /* Structure to define Thermal Zone parameters */ struct thermal_zone_params { - char governor_name[THERMAL_NAME_LENGTH]; + const char *governor_name; /* * a boolean to indicate if the thermal to hwmon sysfs interface @@ -247,9 +152,6 @@ struct thermal_zone_params { */ 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 @@ -289,93 +191,62 @@ struct thermal_zone_params { int offset; }; -/** - * 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_trips: a pointer to a function that sets a temperature window. When - * this window is left the driver must inform the thermal core via - * thermal_zone_device_update. - * @set_emul_temp: a pointer to a function that sets sensor emulated - * temperature. - * @set_trip_temp: a pointer to a function that sets the trip temperature on - * hardware. - */ -struct thermal_zone_of_device_ops { - int (*get_temp)(void *, int *); - int (*get_trend)(void *, int, enum thermal_trend *); - int (*set_trips)(void *, int, int); - int (*set_emul_temp)(void *, int); - int (*set_trip_temp)(void *, int, int); -}; - /* Function declarations */ #ifdef CONFIG_THERMAL_OF -int thermal_zone_of_get_sensor_id(struct device_node *tz_np, - struct device_node *sensor_np, - u32 *id); -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); -struct thermal_zone_device *devm_thermal_zone_of_sensor_register( - struct device *dev, int id, void *data, - const struct thermal_zone_of_device_ops *ops); -void devm_thermal_zone_of_sensor_unregister(struct device *dev, - struct thermal_zone_device *tz); -#else +struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, int id, void *data, + const struct thermal_zone_device_ops *ops); -static inline int thermal_zone_of_get_sensor_id(struct device_node *tz_np, - struct device_node *sensor_np, - u32 *id) -{ - return -ENOENT; -} -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); -} +void devm_thermal_of_zone_unregister(struct device *dev, struct thermal_zone_device *tz); + +#else static inline -void thermal_zone_of_sensor_unregister(struct device *dev, - struct thermal_zone_device *tz) +struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, int id, void *data, + const struct thermal_zone_device_ops *ops) { + return ERR_PTR(-ENOTSUPP); } -static inline struct thermal_zone_device *devm_thermal_zone_of_sensor_register( - struct device *dev, int id, void *data, - const struct thermal_zone_of_device_ops *ops) +static inline void devm_thermal_of_zone_unregister(struct device *dev, + struct thermal_zone_device *tz) { - return ERR_PTR(-ENODEV); } +#endif -static inline -void devm_thermal_zone_of_sensor_unregister(struct device *dev, - struct thermal_zone_device *tz) -{ -} +int for_each_thermal_trip(struct thermal_zone_device *tz, + int (*cb)(struct thermal_trip *, void *), + void *data); +int thermal_zone_for_each_trip(struct thermal_zone_device *tz, + int (*cb)(struct thermal_trip *, void *), + void *data); +void thermal_zone_set_trip_temp(struct thermal_zone_device *tz, + struct thermal_trip *trip, int temp); -#endif +int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp); #ifdef CONFIG_THERMAL -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 *); +struct thermal_zone_device *thermal_zone_device_register_with_trips( + const char *type, + const struct thermal_trip *trips, + int num_trips, void *devdata, + const struct thermal_zone_device_ops *ops, + const struct thermal_zone_params *tzp, + unsigned int passive_delay, + unsigned int polling_delay); + +struct thermal_zone_device *thermal_tripless_zone_device_register( + const char *type, + void *devdata, + const struct thermal_zone_device_ops *ops, + const struct thermal_zone_params *tzp); + +void thermal_zone_device_unregister(struct thermal_zone_device *tz); + +void *thermal_zone_device_priv(struct thermal_zone_device *tzd); +const char *thermal_zone_device_type(struct thermal_zone_device *tzd); +int thermal_zone_device_id(struct thermal_zone_device *tzd); +struct device *thermal_zone_device(struct thermal_zone_device *tzd); + void thermal_zone_device_update(struct thermal_zone_device *, enum thermal_notify_event); @@ -387,40 +258,58 @@ thermal_of_cooling_device_register(struct device_node *np, const char *, void *, struct thermal_cooling_device * devm_thermal_of_cooling_device_register(struct device *dev, struct device_node *np, - char *type, void *devdata, + const char *type, void *devdata, const struct thermal_cooling_device_ops *ops); +void thermal_cooling_device_update(struct thermal_cooling_device *); 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 thermal_zone_get_slope(struct thermal_zone_device *tz); int thermal_zone_get_offset(struct thermal_zone_device *tz); +bool thermal_trip_is_bound_to_cdev(struct thermal_zone_device *tz, + const struct thermal_trip *trip, + struct thermal_cooling_device *cdev); -void thermal_cdev_update(struct thermal_cooling_device *); -void thermal_notify_framework(struct thermal_zone_device *, int); int thermal_zone_device_enable(struct thermal_zone_device *tz); int thermal_zone_device_disable(struct thermal_zone_device *tz); +void thermal_zone_device_critical(struct thermal_zone_device *tz); #else -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, - struct thermal_zone_params *tzp, - int passive_delay, int polling_delay) +static inline struct thermal_zone_device *thermal_zone_device_register_with_trips( + const char *type, + const struct thermal_trip *trips, + int num_trips, void *devdata, + const struct thermal_zone_device_ops *ops, + const struct thermal_zone_params *tzp, + int passive_delay, int polling_delay) +{ return ERR_PTR(-ENODEV); } + +static inline struct thermal_zone_device *thermal_tripless_zone_device_register( + const char *type, + void *devdata, + struct thermal_zone_device_ops *ops, + const struct thermal_zone_params *tzp) { return ERR_PTR(-ENODEV); } -static inline void thermal_zone_device_unregister( - struct thermal_zone_device *tz) + +static inline void thermal_zone_device_unregister(struct thermal_zone_device *tz) { } + +static inline void thermal_zone_device_update(struct thermal_zone_device *tz, + enum thermal_notify_event event) +{ } + static inline struct thermal_cooling_device * -thermal_cooling_device_register(char *type, void *devdata, +thermal_cooling_device_register(const 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) + const char *type, void *devdata, + const struct thermal_cooling_device_ops *ops) { return ERR_PTR(-ENODEV); } static inline struct thermal_cooling_device * devm_thermal_of_cooling_device_register(struct device *dev, struct device_node *np, - char *type, void *devdata, + const char *type, void *devdata, const struct thermal_cooling_device_ops *ops) { return ERR_PTR(-ENODEV); @@ -441,11 +330,20 @@ static inline int thermal_zone_get_offset( struct thermal_zone_device *tz) { return -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) -{ } +static inline void *thermal_zone_device_priv(struct thermal_zone_device *tz) +{ + return NULL; +} + +static inline const char *thermal_zone_device_type(struct thermal_zone_device *tzd) +{ + return NULL; +} + +static inline int thermal_zone_device_id(struct thermal_zone_device *tzd) +{ + return -ENODEV; +} static inline int thermal_zone_device_enable(struct thermal_zone_device *tz) { return -ENODEV; } |