1 // SPDX-License-Identifier: GPL-2.0-only
19 #include <linux/thermal.h>
42 /* Number of trip points in thermal zone. Currently it can't
67 static struct zone_device **zones;  variable
94  * - cpu hotplug: Read serialized by cpu hotplug lock
97  * - Other callsites: Must hold pkg_temp_lock
104 		return zones[id];  in pkg_temp_thermal_get_dev()
113 	ret = intel_tcc_get_temp(zonedev->cpu, &val, true);  in sys_get_curr_temp()
129 	tj_max = intel_tcc_get_tjmax(zonedev->cpu);  in sys_set_trip_temp()
134 	val = (tj_max - temp)/1000;  in sys_set_trip_temp()
137 		return -EINVAL;  in sys_set_trip_temp()
139 	ret = rdmsr_on_cpu(zonedev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT,  in sys_set_trip_temp()
165 	return wrmsr_on_cpu(zonedev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT,  in sys_set_trip_temp()
169 /* Thermal zone callback registry */
224 	zonedev->work_scheduled = false;  in pkg_temp_thermal_threshold_work_fn()
227 	tzone = zonedev->tzone;  in pkg_temp_thermal_threshold_work_fn()
262 	if (zonedev && !zonedev->work_scheduled) {  in pkg_thermal_notify()
263 		zonedev->work_scheduled = true;  in pkg_thermal_notify()
264 		pkg_thermal_schedule_work(zonedev->cpu, &zonedev->work);  in pkg_thermal_notify()
280 		return ERR_PTR(-ENOMEM);  in pkg_temp_thermal_trips_init()
302 			tj_max - thres_reg_value * 1000 : THERMAL_TEMP_INVALID;  in pkg_temp_thermal_trips_init()
322 		return -ENOMEM;  in pkg_temp_thermal_device_add()
327 		return -ENODEV;  in pkg_temp_thermal_device_add()
337 		return -ENOMEM;  in pkg_temp_thermal_device_add()
339 	zonedev->trips = pkg_temp_thermal_trips_init(cpu, tj_max, thres_count);  in pkg_temp_thermal_device_add()
340 	if (IS_ERR(zonedev->trips)) {  in pkg_temp_thermal_device_add()
341 		err = PTR_ERR(zonedev->trips);  in pkg_temp_thermal_device_add()
345 	INIT_DELAYED_WORK(&zonedev->work, pkg_temp_thermal_threshold_work_fn);  in pkg_temp_thermal_device_add()
346 	zonedev->cpu = cpu;  in pkg_temp_thermal_device_add()
347 	zonedev->tzone = thermal_zone_device_register_with_trips("x86_pkg_temp",  in pkg_temp_thermal_device_add()
348 			zonedev->trips, thres_count,  in pkg_temp_thermal_device_add()
351 	if (IS_ERR(zonedev->tzone)) {  in pkg_temp_thermal_device_add()
352 		err = PTR_ERR(zonedev->tzone);  in pkg_temp_thermal_device_add()
355 	err = thermal_zone_device_enable(zonedev->tzone);  in pkg_temp_thermal_device_add()
359 	/* Store MSR value for package thermal interrupt, to restore at exit */  in pkg_temp_thermal_device_add()
360 	rdmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, zonedev->msr_pkg_therm_low,  in pkg_temp_thermal_device_add()
361 	      zonedev->msr_pkg_therm_high);  in pkg_temp_thermal_device_add()
363 	cpumask_set_cpu(cpu, &zonedev->cpumask);  in pkg_temp_thermal_device_add()
365 	zones[id] = zonedev;  in pkg_temp_thermal_device_add()
371 	thermal_zone_device_unregister(zonedev->tzone);  in pkg_temp_thermal_device_add()
373 	kfree(zonedev->trips);  in pkg_temp_thermal_device_add()
388 	target = cpumask_any_but(&zonedev->cpumask, cpu);  in pkg_thermal_cpu_offline()
389 	cpumask_clear_cpu(cpu, &zonedev->cpumask);  in pkg_thermal_cpu_offline()
396 		struct thermal_zone_device *tzone = zonedev->tzone;  in pkg_thermal_cpu_offline()
405 		zonedev->tzone = NULL;  in pkg_thermal_cpu_offline()
419 	was_target = zonedev->cpu == cpu;  in pkg_thermal_cpu_offline()
420 	zonedev->cpu = target;  in pkg_thermal_cpu_offline()
429 		zones[topology_logical_die_id(cpu)] = NULL;  in pkg_thermal_cpu_offline()
432 		      zonedev->msr_pkg_therm_low, zonedev->msr_pkg_therm_high);  in pkg_thermal_cpu_offline()
439 	if (zonedev->work_scheduled && was_target) {  in pkg_thermal_cpu_offline()
445 		cancel_delayed_work_sync(&zonedev->work);  in pkg_thermal_cpu_offline()
453 		if (!lastcpu && zonedev->work_scheduled)  in pkg_thermal_cpu_offline()
454 			pkg_thermal_schedule_work(target, &zonedev->work);  in pkg_thermal_cpu_offline()
461 		kfree(zonedev->trips);  in pkg_thermal_cpu_offline()
474 		return -ENODEV;  in pkg_thermal_cpu_online()
478 		cpumask_set_cpu(cpu, &zonedev->cpumask);  in pkg_thermal_cpu_online()
495 		return -ENODEV;  in pkg_temp_thermal_init()
498 	zones = kcalloc(max_id, sizeof(struct zone_device *),  in pkg_temp_thermal_init()
500 	if (!zones)  in pkg_temp_thermal_init()
501 		return -ENOMEM;  in pkg_temp_thermal_init()
503 	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "thermal/x86_pkg:online",  in pkg_temp_thermal_init()
519 	kfree(zones);  in pkg_temp_thermal_init()
531 	kfree(zones);  in module_init()
536 MODULE_DESCRIPTION("X86 PKG TEMP Thermal Driver");