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-rw-r--r--include/linux/thermal.h97
1 files changed, 88 insertions, 9 deletions
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 5eac316490ea..037e9df2f610 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -40,6 +40,9 @@
/* No upper/lower limit requirement */
#define THERMAL_NO_LIMIT ((u32)~0)
+/* Default weight of a bound cooling device */
+#define THERMAL_WEIGHT_DEFAULT 0
+
/* Unit conversion macros */
#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \
((long)t-2732+5)/10 : ((long)t-2732-5)/10)
@@ -56,10 +59,13 @@
#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"
#endif
struct thermal_zone_device;
struct thermal_cooling_device;
+struct thermal_instance;
enum thermal_device_mode {
THERMAL_DEVICE_DISABLED = 0,
@@ -113,6 +119,12 @@ 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 {
@@ -144,8 +156,7 @@ struct thermal_attr {
* @devdata: private pointer for device private data
* @trips: number of trip points the thermal zone supports
* @passive_delay: number of milliseconds to wait between polls when
- * performing passive cooling. Currenty only used by the
- * step-wise governor
+ * 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)
@@ -155,13 +166,13 @@ struct thermal_attr {
* @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.
- * Currenty only used by the step-wise governor.
* @forced_passive: If > 0, temperature at which to switch on all ACPI
* processor cooling devices. Currently only used by the
* step-wise governor.
* @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
@@ -186,8 +197,9 @@ struct thermal_zone_device {
int passive;
unsigned int forced_passive;
struct thermal_zone_device_ops *ops;
- const struct thermal_zone_params *tzp;
+ struct thermal_zone_params *tzp;
struct thermal_governor *governor;
+ void *governor_data;
struct list_head thermal_instances;
struct idr idr;
struct mutex lock;
@@ -198,12 +210,19 @@ struct thermal_zone_device {
/**
* 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;
};
@@ -214,9 +233,12 @@ struct thermal_bind_params {
/*
* This is a measure of 'how effectively these devices can
- * cool 'this' thermal zone. The shall be determined by platform
- * characterization. This is on a 'percentage' scale.
- * See Documentation/thermal/sysfs-api.txt for more information.
+ * 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;
@@ -253,6 +275,44 @@ struct thermal_zone_params {
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 {
@@ -316,14 +376,25 @@ void thermal_zone_of_sensor_unregister(struct device *dev,
#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_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 *,
- const struct thermal_zone_params *, int, int);
+ 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 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 *);
@@ -343,6 +414,14 @@ struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
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_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,