107  * @tz: thermal zone we are operating in
116 static u32 estimate_sustainable_power(struct thermal_zone_device *tz)  in estimate_sustainable_power()  argument
118 	struct power_allocator_params *params = tz->governor_data;  in estimate_sustainable_power()
124 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {  in estimate_sustainable_power()
140  * @tz:		thermal zone for which to estimate the constants
148 static void estimate_pid_constants(struct thermal_zone_device *tz,  in estimate_pid_constants()  argument
170 	tz->tzp->k_po = int_to_frac(sustainable_power) /  in estimate_pid_constants()
173 	tz->tzp->k_pu = int_to_frac(2 * sustainable_power) /  in estimate_pid_constants()
176 	k_i = tz->tzp->k_pu / 10;  in estimate_pid_constants()
177 	tz->tzp->k_i = k_i > 0 ? k_i : 1;  in estimate_pid_constants()
187  * @tz:		thermal zone for which to estimate the constants
196 static u32 get_sustainable_power(struct thermal_zone_device *tz,  in get_sustainable_power()  argument
202 	if (!tz->tzp->sustainable_power)  in get_sustainable_power()
203 		sustainable_power = estimate_sustainable_power(tz);  in get_sustainable_power()
205 		sustainable_power = tz->tzp->sustainable_power;  in get_sustainable_power()
209 		estimate_pid_constants(tz, sustainable_power,  in get_sustainable_power()
213 		tz->tzp->sustainable_power = sustainable_power;  in get_sustainable_power()
222  * @tz:	thermal zone we are operating in
238 static u32 pid_controller(struct thermal_zone_device *tz,  in pid_controller()  argument
242 	struct power_allocator_params *params = tz->governor_data;  in pid_controller()
249 	sustainable_power = get_sustainable_power(tz, params, control_temp);  in pid_controller()
251 	err = control_temp - tz->temperature;  in pid_controller()
255 	p = mul_frac(err < 0 ? tz->tzp->k_po : tz->tzp->k_pu, err);  in pid_controller()
263 	i = mul_frac(tz->tzp->k_i, params->err_integral);  in pid_controller()
265 	if (err < int_to_frac(tz->tzp->integral_cutoff)) {  in pid_controller()
266 		s64 i_next = i + mul_frac(tz->tzp->k_i, err);  in pid_controller()
281 	d = mul_frac(tz->tzp->k_d, err - params->prev_err);  in pid_controller()
282 	d = div_frac(d, jiffies_to_msecs(tz->passive_delay_jiffies));  in pid_controller()
292 	trace_thermal_power_allocator_pid(tz, frac_to_int(err),  in pid_controller()
398 static int allocate_power(struct thermal_zone_device *tz, int control_temp)  in allocate_power()  argument
400 	struct power_allocator_params *params = tz->governor_data;  in allocate_power()
418 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {  in allocate_power()
449 	power_range = pid_controller(tz, control_temp, max_allocatable_power);  in allocate_power()
455 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {  in allocate_power()
465 		trace_thermal_power_actor(tz, i, pa->req_power,  in allocate_power()
470 	trace_thermal_power_allocator(tz, total_req_power, total_granted_power,  in allocate_power()
472 				      max_allocatable_power, tz->temperature,  in allocate_power()
473 				      control_temp - tz->temperature);  in allocate_power()
480  * @tz:	thermal zone to operate on
493 static void get_governor_trips(struct thermal_zone_device *tz,  in get_governor_trips()  argument
501 	for_each_trip(tz, trip) {  in get_governor_trips()
536 static void allow_maximum_power(struct thermal_zone_device *tz, bool update)  in allow_maximum_power()  argument
538 	struct power_allocator_params *params = tz->governor_data;  in allow_maximum_power()
543 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {  in allow_maximum_power()
568  * @tz:		thermal zone to operate on
571  * Check all cooling devices in the @tz and warn every time they are missing
575  * If all of the cooling devices currently attached to @tz implement the power
579 static int check_power_actors(struct thermal_zone_device *tz,  in check_power_actors()  argument
585 	list_for_each_entry(instance, &tz->thermal_instances, tz_node) {  in check_power_actors()
590 			dev_warn(&tz->device, "power_allocator: %s is not a power actor\n",  in check_power_actors()
632 static void power_allocator_update_tz(struct thermal_zone_device *tz,  in power_allocator_update_tz()  argument
635 	struct power_allocator_params *params = tz->governor_data;  in power_allocator_update_tz()
642 		list_for_each_entry(instance, &tz->thermal_instances, tz_node)  in power_allocator_update_tz()
653 		list_for_each_entry(instance, &tz->thermal_instances, tz_node)  in power_allocator_update_tz()
664  * @tz:	thermal zone to bind it to
670  * when there are unsupported cooling devices in the @tz.
672 static int power_allocator_bind(struct thermal_zone_device *tz)  in power_allocator_bind()  argument
681 	get_governor_trips(tz, params);  in power_allocator_bind()
683 		dev_warn(&tz->device, "power_allocator: missing trip_max\n");  in power_allocator_bind()
688 	ret = check_power_actors(tz, params);  in power_allocator_bind()
690 		dev_warn(&tz->device, "power_allocator: binding failed\n");  in power_allocator_bind()
697 		dev_warn(&tz->device, "power_allocator: allocation failed\n");  in power_allocator_bind()
702 	if (!tz->tzp) {  in power_allocator_bind()
703 		tz->tzp = kzalloc(sizeof(*tz->tzp), GFP_KERNEL);  in power_allocator_bind()
704 		if (!tz->tzp) {  in power_allocator_bind()
712 	if (!tz->tzp->sustainable_power)  in power_allocator_bind()
713 		dev_warn(&tz->device, "power_allocator: sustainable_power will be estimated\n");  in power_allocator_bind()
715 	estimate_pid_constants(tz, tz->tzp->sustainable_power,  in power_allocator_bind()
721 	tz->governor_data = params;  in power_allocator_bind()
732 static void power_allocator_unbind(struct thermal_zone_device *tz)  in power_allocator_unbind()  argument
734 	struct power_allocator_params *params = tz->governor_data;  in power_allocator_unbind()
736 	dev_dbg(&tz->device, "Unbinding from thermal zone %d\n", tz->id);  in power_allocator_unbind()
739 		kfree(tz->tzp);  in power_allocator_unbind()
740 		tz->tzp = NULL;  in power_allocator_unbind()
744 	kfree(tz->governor_data);  in power_allocator_unbind()
745 	tz->governor_data = NULL;  in power_allocator_unbind()
748 static int power_allocator_throttle(struct thermal_zone_device *tz,  in power_allocator_throttle()  argument
751 	struct power_allocator_params *params = tz->governor_data;  in power_allocator_throttle()
754 	lockdep_assert_held(&tz->lock);  in power_allocator_throttle()
764 	if (trip && tz->temperature < trip->temperature) {  in power_allocator_throttle()
765 		update = tz->passive;  in power_allocator_throttle()
766 		tz->passive = 0;  in power_allocator_throttle()
768 		allow_maximum_power(tz, update);  in power_allocator_throttle()
772 	tz->passive = 1;  in power_allocator_throttle()
774 	return allocate_power(tz, params->trip_max->temperature);  in power_allocator_throttle()