From bceb5646a15dad49ceb29ec16b8acc10075d0627 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Tue, 31 Mar 2020 18:54:48 +0200 Subject: thermal: core: Make thermal_zone_set_trips private The function thermal_zone_set_trips() is used by the thermal core code in order to update the next trip points, there are no other users. Move the function definition in the thermal_core.h, remove the EXPORT_SYMBOL_GPL and document the function. Signed-off-by: Daniel Lezcano Reviewed-by: Lukasz Luba Reviewed-by: Amit Kucheria Link: https://lore.kernel.org/r/20200331165449.30355-1-daniel.lezcano@linaro.org --- include/linux/thermal.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/thermal.h b/include/linux/thermal.h index c91b1e344d56..448841ab0dca 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -439,7 +439,6 @@ int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, struct thermal_cooling_device *); void thermal_zone_device_update(struct thermal_zone_device *, enum thermal_notify_event); -void thermal_zone_set_trips(struct thermal_zone_device *); struct thermal_cooling_device *thermal_cooling_device_register(const char *, void *, const struct thermal_cooling_device_ops *); @@ -497,8 +496,6 @@ static inline int thermal_zone_unbind_cooling_device( static inline void thermal_zone_device_update(struct thermal_zone_device *tz, enum thermal_notify_event event) { } -static inline void thermal_zone_set_trips(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) -- cgit v1.2.3-59-g8ed1b From 8097db407a08f33236b6fa6ba8b62d669321c720 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 2 Apr 2020 16:27:39 +0200 Subject: thermal: Move default governor config option to the internal header The default governor set at compilation time is a thermal internal business, no need to export to the global thermal header. Move the config options to the internal header. Signed-off-by: Daniel Lezcano Reviewed-by: Amit Kucheria Acked-by: Zhang Rui Link: https://lore.kernel.org/r/20200402142747.8307-1-daniel.lezcano@linaro.org --- drivers/thermal/thermal_core.h | 11 +++++++++++ include/linux/thermal.h | 11 ----------- 2 files changed, 11 insertions(+), 11 deletions(-) (limited to 'include/linux') diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index 37cd4e2bead2..828305508556 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -12,6 +12,17 @@ #include #include +/* 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" +#endif + /* Initial state of a cooling device during binding */ #define THERMAL_NO_TARGET -1UL diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 448841ab0dca..71cff87dcb46 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -32,17 +32,6 @@ /* use value, which < 0K, to indicate an invalid/uninitialized temperature */ #define THERMAL_TEMP_INVALID -274000 -/* 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" -#endif - struct thermal_zone_device; struct thermal_cooling_device; struct thermal_instance; -- cgit v1.2.3-59-g8ed1b From c68df440b07f88210c5839d4507b5cbfa35e3df9 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 2 Apr 2020 16:27:40 +0200 Subject: thermal: Move struct thermal_attr to the private header The structure belongs to the thermal core internals but it is exported in the include/linux/thermal.h For better self-encapsulation and less impact for the compilation if a change is made on it. Move the structure in the thermal core internal header file. Signed-off-by: Daniel Lezcano Reviewed-by: Amit Kucheria Acked-by: Zhang Rui Link: https://lore.kernel.org/r/20200402142747.8307-2-daniel.lezcano@linaro.org --- drivers/thermal/thermal_core.h | 5 +++++ include/linux/thermal.h | 6 +----- 2 files changed, 6 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index 828305508556..5d08ad60d9df 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -41,6 +41,11 @@ extern struct thermal_governor *__governor_thermal_table_end[]; __governor < __governor_thermal_table_end; \ __governor++) +struct thermal_attr { + struct device_attribute attr; + char name[THERMAL_NAME_LENGTH]; +}; + /* * This structure is used to describe the behavior of * a certain cooling device on a certain trip point diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 71cff87dcb46..5aa80fb2fb61 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -35,6 +35,7 @@ struct thermal_zone_device; struct thermal_cooling_device; struct thermal_instance; +struct thermal_attr; enum thermal_device_mode { THERMAL_DEVICE_DISABLED = 0, @@ -119,11 +120,6 @@ struct thermal_cooling_device { 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 -- cgit v1.2.3-59-g8ed1b From 33a88af10944edc7fd390000cd6bc9bbde918bc3 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 2 Apr 2020 16:27:41 +0200 Subject: thermal: Move internal IPA functions The exported IPA functions are used by the IPA. It is pointless to declare the functions in the thermal.h file. For better self-encapsulation and less impact for the compilation if a change is made on it. Move the code in the thermal core internal header file. As the users depends on THERMAL then it is pointless to have the stub, remove them. Take also the opportunity to fix checkpatch warnings/errors when moving the code around. Signed-off-by: Daniel Lezcano Reviewed-by: Amit Kucheria Acked-by: Zhang Rui Link: https://lore.kernel.org/r/20200402142747.8307-3-daniel.lezcano@linaro.org --- drivers/thermal/thermal_core.h | 13 +++++++++++++ include/linux/thermal.h | 24 ------------------------ 2 files changed, 13 insertions(+), 24 deletions(-) (limited to 'include/linux') diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index 5d08ad60d9df..f99551ce9838 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -46,6 +46,19 @@ struct thermal_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; +} + +int power_actor_get_max_power(struct thermal_cooling_device *cdev, + struct thermal_zone_device *tz, u32 *max_power); +int power_actor_get_min_power(struct thermal_cooling_device *cdev, + struct thermal_zone_device *tz, u32 *min_power); +int power_actor_set_power(struct thermal_cooling_device *cdev, + struct thermal_instance *ti, u32 power); + /* * This structure is used to describe the behavior of * a certain cooling device on a certain trip point diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 5aa80fb2fb61..e0279f7b43f4 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -399,18 +399,6 @@ void devm_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_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); @@ -447,18 +435,6 @@ 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_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, -- cgit v1.2.3-59-g8ed1b From 2e7700dc336dde93cdc9394d10ccd79593fff214 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 2 Apr 2020 16:27:42 +0200 Subject: thermal: Move trip point structure definition to private header The struct thermal_trip is only used by the thermal internals, it is pointless to export the definition in the global header. Move the structure to the thermal_core.h internal header. Signed-off-by: Daniel Lezcano Reviewed-by: Amit Kucheria Acked-by: Zhang Rui Link: https://lore.kernel.org/r/20200402142747.8307-4-daniel.lezcano@linaro.org --- drivers/thermal/thermal_core.h | 13 +++++++++++++ include/linux/thermal.h | 15 --------------- 2 files changed, 13 insertions(+), 15 deletions(-) (limited to 'include/linux') diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index f99551ce9838..d37de708c28a 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -58,6 +58,19 @@ int power_actor_get_min_power(struct thermal_cooling_device *cdev, struct thermal_zone_device *tz, u32 *min_power); int power_actor_set_power(struct thermal_cooling_device *cdev, struct thermal_instance *ti, u32 power); +/** + * 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; + int temperature; + int hysteresis; + enum thermal_trip_type type; +}; /* * This structure is used to describe the behavior of diff --git a/include/linux/thermal.h b/include/linux/thermal.h index e0279f7b43f4..7adbfe092281 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -332,21 +332,6 @@ struct thermal_zone_of_device_ops { int (*set_trip_temp)(void *, int, 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; - int temperature; - int hysteresis; - enum thermal_trip_type type; -}; - /* Function declarations */ #ifdef CONFIG_THERMAL_OF int thermal_zone_of_get_sensor_id(struct device_node *tz_np, -- cgit v1.2.3-59-g8ed1b From f0129c231772a85a726b233756cdc58ea42a9d84 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 2 Apr 2020 16:27:43 +0200 Subject: thermal: Move get_tz_trend to the internal header The function is not used any place other than the thermal directory. It does not make sense to export its definition in the global header as there is no use of it. Move the definition to the internal header and allow better self-encapsulation. Take the opportunity to add the parameter names to make checkpatch happy and remove the pointless stubs. Signed-off-by: Daniel Lezcano Reviewed-by: Amit Kucheria Acked-by: Zhang Rui Link: https://lore.kernel.org/r/20200402142747.8307-5-daniel.lezcano@linaro.org --- drivers/thermal/thermal_core.h | 2 ++ include/linux/thermal.h | 4 +--- 2 files changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index d37de708c28a..5fb2bd9c7034 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -72,6 +72,8 @@ struct thermal_trip { enum thermal_trip_type type; }; +int get_tz_trend(struct thermal_zone_device *tz, int trip); + /* * This structure is used to describe the behavior of * a certain cooling device on a certain trip point diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 7adbfe092281..8006ba5de855 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -414,7 +414,6 @@ 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); -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 *); @@ -473,8 +472,7 @@ static inline int thermal_zone_get_slope( static inline int thermal_zone_get_offset( struct thermal_zone_device *tz) { 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) -- cgit v1.2.3-59-g8ed1b From 06f1041f5023c00a54f63c269b997c61d1b3b739 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 2 Apr 2020 16:27:44 +0200 Subject: thermal: Move get_thermal_instance to the internal header The function is not used any place other than the thermal directory. It does not make sense to export its definition in the global header as there is no use of it. Move the definition to the internal header and allow better self-encapsulation. Take the opportunity to add the parameter names to make checkpatch happy and remove the pointless stubs. Signed-off-by: Daniel Lezcano Reviewed-by: Amit Kucheria Acked-by: Zhang Rui Link: https://lore.kernel.org/r/20200402142747.8307-6-daniel.lezcano@linaro.org --- drivers/thermal/thermal_core.h | 5 +++++ include/linux/thermal.h | 6 ------ 2 files changed, 5 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index 5fb2bd9c7034..c95689586e19 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -74,6 +74,11 @@ struct thermal_trip { int get_tz_trend(struct thermal_zone_device *tz, int 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 diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 8006ba5de855..47e745c5dfca 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -414,8 +414,6 @@ 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); -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 @@ -473,10 +471,6 @@ static inline int thermal_zone_get_offset( struct thermal_zone_device *tz) { 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, -- cgit v1.2.3-59-g8ed1b From 60518260cab21e749704baa5246ff13f7559fa91 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 2 Apr 2020 16:27:45 +0200 Subject: thermal: Change IS_ENABLED to IFDEF in the header file The thermal framework can not be compiled as a module. The IS_ENABLED macro is useless here and can be replaced by an ifdef. Signed-off-by: Daniel Lezcano Reviewed-by: Amit Kucheria Acked-by: Zhang Rui Link: https://lore.kernel.org/r/20200402142747.8307-7-daniel.lezcano@linaro.org --- include/linux/thermal.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 47e745c5dfca..12df9ff0182d 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -383,7 +383,7 @@ void devm_thermal_zone_of_sensor_unregister(struct device *dev, #endif -#if IS_ENABLED(CONFIG_THERMAL) +#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); -- cgit v1.2.3-59-g8ed1b From 708418500644c248d6f266e4df0bf43ce53bf746 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 2 Apr 2020 16:27:46 +0200 Subject: thermal: Remove stubs for thermal_zone_[un]bind_cooling_device All callers of the functions depends on THERMAL, it is pointless to define stubs. Remove them. Signed-off-by: Daniel Lezcano Reviewed-by: Amit Kucheria Acked-by: Zhang Rui Link: https://lore.kernel.org/r/20200402142747.8307-8-daniel.lezcano@linaro.org --- include/linux/thermal.h | 10 ---------- 1 file changed, 10 deletions(-) (limited to 'include/linux') diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 12df9ff0182d..7b3dbfe15b59 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -426,16 +426,6 @@ static inline struct thermal_zone_device *thermal_zone_device_register( 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, enum thermal_notify_event event) { } -- cgit v1.2.3-59-g8ed1b From 0145f67866b71e8c1da3c1d9412623db7ba8a0c8 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 2 Apr 2020 16:27:47 +0200 Subject: thermal: Remove thermal_zone_device_update() stub All users of the function depends on THERMAL, no stub is needed. Remove it. Signed-off-by: Daniel Lezcano Reviewed-by: Amit Kucheria Acked-by: Zhang Rui Link: https://lore.kernel.org/r/20200402142747.8307-9-daniel.lezcano@linaro.org --- include/linux/thermal.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 7b3dbfe15b59..216185bb3014 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -426,9 +426,6 @@ static inline struct thermal_zone_device *thermal_zone_device_register( 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, const struct thermal_cooling_device_ops *ops) -- cgit v1.2.3-59-g8ed1b From 333cff6c963fbc8b9820ca2b6a8b2e22a572cd43 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Wed, 29 Apr 2020 12:36:39 +0200 Subject: powercap/drivers/idle_inject: Specify idle state max latency Currently the idle injection framework uses the play_idle() function which puts the current CPU in an idle state. The idle state is the deepest one, as specified by the latency constraint when calling the subsequent play_idle_precise() function with the INT_MAX. The idle_injection is used by the cpuidle_cooling device which computes the idle / run duration to mitigate the temperature by injecting idle cycles. The cooling device has no control on the depth of the idle state. Allow finer control of the idle injection mechanism by allowing to specify the latency for the idle state. Thus the cooling device has the ability to have a guarantee on the exit latency of the idle states it is injecting. Acked-by: Rafael J. Wysocki Signed-off-by: Daniel Lezcano Reviewed-by: Amit Kucheria Link: https://lore.kernel.org/r/20200429103644.5492-1-daniel.lezcano@linaro.org --- drivers/powercap/idle_inject.c | 16 +++++++++++++++- include/linux/idle_inject.h | 4 ++++ 2 files changed, 19 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/drivers/powercap/idle_inject.c b/drivers/powercap/idle_inject.c index e9bbd3c42eef..c90f0990968b 100644 --- a/drivers/powercap/idle_inject.c +++ b/drivers/powercap/idle_inject.c @@ -61,12 +61,14 @@ struct idle_inject_thread { * @timer: idle injection period timer * @idle_duration_us: duration of CPU idle time to inject * @run_duration_us: duration of CPU run time to allow + * @latency_us: max allowed latency * @cpumask: mask of CPUs affected by idle injection */ struct idle_inject_device { struct hrtimer timer; unsigned int idle_duration_us; unsigned int run_duration_us; + unsigned int latency_us; unsigned long cpumask[]; }; @@ -138,7 +140,8 @@ static void idle_inject_fn(unsigned int cpu) */ iit->should_run = 0; - play_idle(READ_ONCE(ii_dev->idle_duration_us)); + play_idle_precise(READ_ONCE(ii_dev->idle_duration_us) * NSEC_PER_USEC, + READ_ONCE(ii_dev->latency_us) * NSEC_PER_USEC); } /** @@ -169,6 +172,16 @@ void idle_inject_get_duration(struct idle_inject_device *ii_dev, *idle_duration_us = READ_ONCE(ii_dev->idle_duration_us); } +/** + * idle_inject_set_latency - set the maximum latency allowed + * @latency_us: set the latency requirement for the idle state + */ +void idle_inject_set_latency(struct idle_inject_device *ii_dev, + unsigned int latency_us) +{ + WRITE_ONCE(ii_dev->latency_us, latency_us); +} + /** * idle_inject_start - start idle injections * @ii_dev: idle injection control device structure @@ -297,6 +310,7 @@ struct idle_inject_device *idle_inject_register(struct cpumask *cpumask) cpumask_copy(to_cpumask(ii_dev->cpumask), cpumask); hrtimer_init(&ii_dev->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); ii_dev->timer.function = idle_inject_timer_fn; + ii_dev->latency_us = UINT_MAX; for_each_cpu(cpu, to_cpumask(ii_dev->cpumask)) { diff --git a/include/linux/idle_inject.h b/include/linux/idle_inject.h index a445cd1a36c5..91a8612b8bf9 100644 --- a/include/linux/idle_inject.h +++ b/include/linux/idle_inject.h @@ -26,4 +26,8 @@ void idle_inject_set_duration(struct idle_inject_device *ii_dev, void idle_inject_get_duration(struct idle_inject_device *ii_dev, unsigned int *run_duration_us, unsigned int *idle_duration_us); + +void idle_inject_set_latency(struct idle_inject_device *ii_dev, + unsigned int latency_ns); + #endif /* __IDLE_INJECT_H__ */ -- cgit v1.2.3-59-g8ed1b From dfd0bda3703cdaf1fccd5da72cb7101a4fedfe68 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Wed, 29 Apr 2020 12:36:41 +0200 Subject: thermal/drivers/cpuidle_cooling: Change the registration function Today, there is no user for the cpuidle cooling device. The targetted platform is ARM and ARM64. The cpuidle and the cpufreq cooling device are based on the device tree. As the cpuidle cooling device can have its own configuration depending on the platform and the available idle states. The DT node description will give the optional properties to set the cooling device up. Do no longer rely on the CPU node which is prone to error and will lead to a confusion in the DT because the cpufreq cooling device is also using it. Let initialize the cpuidle cooling device with the DT binding. This was tested on: - hikey960 - hikey6220 - rock960 - db845c Acked-by: Viresh Kumar Signed-off-by: Daniel Lezcano Reviewed-by: Lukasz Luba Reviewed-by: Amit Kucheria Tested-by: Amit Kucheria Link: https://lore.kernel.org/r/20200429103644.5492-3-daniel.lezcano@linaro.org --- drivers/thermal/cpuidle_cooling.c | 63 +++++++++++++++++++++++++++++++-------- include/linux/cpu_cooling.h | 12 ++------ 2 files changed, 53 insertions(+), 22 deletions(-) (limited to 'include/linux') diff --git a/drivers/thermal/cpuidle_cooling.c b/drivers/thermal/cpuidle_cooling.c index 0bb843246f59..78e3e8238116 100644 --- a/drivers/thermal/cpuidle_cooling.c +++ b/drivers/thermal/cpuidle_cooling.c @@ -5,11 +5,14 @@ * Author: Daniel Lezcano * */ +#define pr_fmt(fmt) "cpuidle cooling: " fmt + #include #include #include #include #include +#include #include #include @@ -154,22 +157,25 @@ static struct thermal_cooling_device_ops cpuidle_cooling_ops = { }; /** - * cpuidle_of_cooling_register - Idle cooling device initialization function + * __cpuidle_cooling_register: register the cooling device * @drv: a cpuidle driver structure pointer - * @np: a node pointer to a device tree cooling device node + * @np: a device node structure pointer used for the thermal binding * - * This function is in charge of creating a cooling device per cpuidle - * driver and register it to thermal framework. + * This function is in charge of allocating the cpuidle cooling device + * structure, the idle injection, initialize them and register the + * cooling device to the thermal framework. * - * Return: zero on success, or negative value corresponding to the - * error detected in the underlying subsystems. + * Return: zero on success, a negative value returned by one of the + * underlying subsystem in case of error */ -int cpuidle_of_cooling_register(struct device_node *np, - struct cpuidle_driver *drv) +static int __cpuidle_cooling_register(struct device_node *np, + struct cpuidle_driver *drv) { struct idle_inject_device *ii_dev; struct cpuidle_cooling_device *idle_cdev; struct thermal_cooling_device *cdev; + unsigned int idle_duration_us = TICK_USEC; + unsigned int latency_us = UINT_MAX; char dev_name[THERMAL_NAME_LENGTH]; int id, ret; @@ -191,7 +197,11 @@ int cpuidle_of_cooling_register(struct device_node *np, goto out_id; } - idle_inject_set_duration(ii_dev, TICK_USEC, TICK_USEC); + of_property_read_u32(np, "duration-us", &idle_duration_us); + of_property_read_u32(np, "exit-latency-us", &latency_us); + + idle_inject_set_duration(ii_dev, TICK_USEC, idle_duration_us); + idle_inject_set_latency(ii_dev, latency_us); idle_cdev->ii_dev = ii_dev; @@ -204,6 +214,9 @@ int cpuidle_of_cooling_register(struct device_node *np, goto out_unregister; } + pr_debug("%s: Idle injection set with idle duration=%u, latency=%u\n", + dev_name, idle_duration_us, latency_us); + return 0; out_unregister: @@ -221,12 +234,38 @@ out: * @drv: a cpuidle driver structure pointer * * This function is in charge of creating a cooling device per cpuidle - * driver and register it to thermal framework. + * driver and register it to the thermal framework. * * Return: zero on success, or negative value corresponding to the * error detected in the underlying subsystems. */ -int cpuidle_cooling_register(struct cpuidle_driver *drv) +void cpuidle_cooling_register(struct cpuidle_driver *drv) { - return cpuidle_of_cooling_register(NULL, drv); + struct device_node *cooling_node; + struct device_node *cpu_node; + int cpu, ret; + + for_each_cpu(cpu, drv->cpumask) { + + cpu_node = of_cpu_device_node_get(cpu); + + cooling_node = of_get_child_by_name(cpu_node, "thermal-idle"); + + of_node_put(cpu_node); + + if (!cooling_node) { + pr_debug("'thermal-idle' node not found for cpu%d\n", cpu); + continue; + } + + ret = __cpuidle_cooling_register(cooling_node, drv); + + of_node_put(cooling_node); + + if (ret) { + pr_err("Failed to register the cpuidle cooling device" \ + "for cpu%d: %d\n", cpu, ret); + break; + } + } } diff --git a/include/linux/cpu_cooling.h b/include/linux/cpu_cooling.h index 65501d8f9778..a3bdc8a98f2c 100644 --- a/include/linux/cpu_cooling.h +++ b/include/linux/cpu_cooling.h @@ -63,18 +63,10 @@ of_cpufreq_cooling_register(struct cpufreq_policy *policy) struct cpuidle_driver; #ifdef CONFIG_CPU_IDLE_THERMAL -int cpuidle_cooling_register(struct cpuidle_driver *drv); -int cpuidle_of_cooling_register(struct device_node *np, - struct cpuidle_driver *drv); +void cpuidle_cooling_register(struct cpuidle_driver *drv); #else /* CONFIG_CPU_IDLE_THERMAL */ -static inline int cpuidle_cooling_register(struct cpuidle_driver *drv) +static inline void cpuidle_cooling_register(struct cpuidle_driver *drv) { - return 0; -} -static inline int cpuidle_of_cooling_register(struct device_node *np, - struct cpuidle_driver *drv) -{ - return 0; } #endif /* CONFIG_CPU_IDLE_THERMAL */ -- cgit v1.2.3-59-g8ed1b