1 // SPDX-License-Identifier: GPL-2.0-only
44  * struct _thermal_state - Represent the current thermal event state
60  *				This is used for the purpose of rate-control.
68  * @sample_count:		Total number of samples collected in the buffer
70  * @average:			The last moving average of temperature samples
73  * @temp_samples:		Storage for temperature samples to calculate
141 	unsigned int cpu = dev->id;					\
242 	unsigned int i, avg, this_cpu = smp_processor_id();  in throttle_active_work()  local
247 	get_therm_status(state->level, &hot, &temp);  in throttle_active_work()
249 	if (!hot && temp > state->baseline_temp) {  in throttle_active_work()
250 		if (state->rate_control_active)  in throttle_active_work()
253 				state->level == CORE_LEVEL ? "Core" : "Package",  in throttle_active_work()
254 				state->count);  in throttle_active_work()
256 		state->rate_control_active = false;  in throttle_active_work()
260 	if (time_before64(now, state->next_check) &&  in throttle_active_work()
261 			  state->rate_control_active)  in throttle_active_work()
264 	state->next_check = now + CHECK_INTERVAL;  in throttle_active_work()
266 	if (state->count != state->last_count) {  in throttle_active_work()
268 		state->last_count = state->count;  in throttle_active_work()
269 		state->average = 0;  in throttle_active_work()
270 		state->sample_count = 0;  in throttle_active_work()
271 		state->sample_index = 0;  in throttle_active_work()
274 	state->temp_samples[state->sample_index] = temp;  in throttle_active_work()
275 	state->sample_count++;  in throttle_active_work()
276 	state->sample_index = (state->sample_index + 1) % ARRAY_SIZE(state->temp_samples);  in throttle_active_work()
277 	if (state->sample_count < ARRAY_SIZE(state->temp_samples))  in throttle_active_work()
280 	avg = 0;  in throttle_active_work()
281 	for (i = 0; i < ARRAY_SIZE(state->temp_samples); ++i)  in throttle_active_work()
282 		avg += state->temp_samples[i];  in throttle_active_work()
284 	avg /= ARRAY_SIZE(state->temp_samples);  in throttle_active_work()
286 	if (state->average > avg) {  in throttle_active_work()
289 			state->level == CORE_LEVEL ? "Core" : "Package",  in throttle_active_work()
290 			state->count);  in throttle_active_work()
291 		state->rate_control_active = true;  in throttle_active_work()
294 	state->average = avg;  in throttle_active_work()
297 	clear_therm_status_log(state->level);  in throttle_active_work()
298 	schedule_delayed_work_on(this_cpu, &state->therm_work, THERM_THROT_POLL_INTERVAL);  in throttle_active_work()
302  * therm_throt_process - Process thermal throttling event from interrupt
323 			state = &pstate->core_throttle;  in therm_throt_process()
325 			state = &pstate->core_power_limit;  in therm_throt_process()
330 			state = &pstate->package_throttle;  in therm_throt_process()
332 			state = &pstate->package_power_limit;  in therm_throt_process()
338 	old_event = state->new_event;  in therm_throt_process()
339 	state->new_event = new_event;  in therm_throt_process()
342 		state->count++;  in therm_throt_process()
347 	if (new_event && !state->last_interrupt_time) {  in therm_throt_process()
351 		get_therm_status(state->level, &hot, &temp);  in therm_throt_process()
360 		state->baseline_temp = temp;  in therm_throt_process()
361 		state->last_interrupt_time = now;  in therm_throt_process()
362 		schedule_delayed_work_on(this_cpu, &state->therm_work, THERM_THROT_POLL_INTERVAL);  in therm_throt_process()
363 	} else if (old_event && state->last_interrupt_time) {  in therm_throt_process()
366 		throttle_time = jiffies_delta_to_msecs(now - state->last_interrupt_time);  in therm_throt_process()
367 		if (throttle_time > state->max_time_ms)  in therm_throt_process()
368 			state->max_time_ms = throttle_time;  in therm_throt_process()
369 		state->total_time_ms += throttle_time;  in therm_throt_process()
370 		state->last_interrupt_time = 0;  in therm_throt_process()
382 		state = (event == 0) ? &pstate->pkg_thresh0 :  in thresh_event_valid()
383 						&pstate->pkg_thresh1;  in thresh_event_valid()
385 		state = (event == 0) ? &pstate->core_thresh0 :  in thresh_event_valid()
386 						&pstate->core_thresh1;  in thresh_event_valid()
388 	if (time_before64(now, state->next_check))  in thresh_event_valid()
391 	state->next_check = now + CHECK_INTERVAL;  in thresh_event_valid()
412 	err = sysfs_create_group(&dev->kobj, &thermal_attr_group);  in thermal_throttle_add_dev()
417 		err = sysfs_add_file_to_group(&dev->kobj,  in thermal_throttle_add_dev()
425 		err = sysfs_add_file_to_group(&dev->kobj,  in thermal_throttle_add_dev()
431 		err = sysfs_add_file_to_group(&dev->kobj,  in thermal_throttle_add_dev()
437 		err = sysfs_add_file_to_group(&dev->kobj,  in thermal_throttle_add_dev()
444 			err = sysfs_add_file_to_group(&dev->kobj,  in thermal_throttle_add_dev()
455 	sysfs_remove_group(&dev->kobj, &thermal_attr_group);  in thermal_throttle_add_dev()
462 	sysfs_remove_group(&dev->kobj, &thermal_attr_group);  in thermal_throttle_remove_dev()
472 	state->package_throttle.level = PACKAGE_LEVEL;  in thermal_throttle_online()
473 	state->core_throttle.level = CORE_LEVEL;  in thermal_throttle_online()
475 	INIT_DELAYED_WORK(&state->package_throttle.therm_work, throttle_active_work);  in thermal_throttle_online()
476 	INIT_DELAYED_WORK(&state->core_throttle.therm_work, throttle_active_work);  in thermal_throttle_online()
495 	cancel_delayed_work_sync(&state->package_throttle.therm_work);  in thermal_throttle_offline()
496 	cancel_delayed_work_sync(&state->core_throttle.therm_work);  in thermal_throttle_offline()
498 	state->package_throttle.rate_control_active = false;  in thermal_throttle_offline()
499 	state->core_throttle.rate_control_active = false;  in thermal_throttle_offline()
666 	 * 0x10000 because APs are woken up by BSP issuing INIT-SIPI-SIPI  in intel_init_thermal()
686 		if (c->x86 == 6 && (c->x86_model == 9 || c->x86_model == 13)) {  in intel_init_thermal()