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
66 static struct zone_device **zones;  variable
93  * - cpu hotplug: Read serialized by cpu hotplug lock
96  * - Other callsites: Must hold pkg_temp_lock
103 		return zones[id];  in pkg_temp_thermal_get_dev()
112 	ret = intel_tcc_get_temp(zonedev->cpu, &val, true);  in sys_get_curr_temp()
126 	unsigned int trip_index = THERMAL_TRIP_PRIV_TO_INT(trip->priv);  in sys_set_trip_temp()
130 	tj_max = intel_tcc_get_tjmax(zonedev->cpu);  in sys_set_trip_temp()
135 	val = (tj_max - temp)/1000;  in sys_set_trip_temp()
138 		return -EINVAL;  in sys_set_trip_temp()
140 	ret = rdmsr_on_cpu(zonedev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT,  in sys_set_trip_temp()
166 	return wrmsr_on_cpu(zonedev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT,  in sys_set_trip_temp()
170 /* Thermal zone callback registry */
225 	zonedev->work_scheduled = false;  in pkg_temp_thermal_threshold_work_fn()
228 	tzone = zonedev->tzone;  in pkg_temp_thermal_threshold_work_fn()
263 	if (zonedev && !zonedev->work_scheduled) {  in pkg_thermal_notify()
264 		zonedev->work_scheduled = true;  in pkg_thermal_notify()
265 		pkg_thermal_schedule_work(zonedev->cpu, &zonedev->work);  in pkg_thermal_notify()
297 			tj_max - thres_reg_value * 1000 : THERMAL_TEMP_INVALID;  in pkg_temp_thermal_trips_init()
320 		return -ENOMEM;  in pkg_temp_thermal_device_add()
325 		return -ENODEV;  in pkg_temp_thermal_device_add()
335 		return -ENOMEM;  in pkg_temp_thermal_device_add()
341 	INIT_DELAYED_WORK(&zonedev->work, pkg_temp_thermal_threshold_work_fn);  in pkg_temp_thermal_device_add()
342 	zonedev->cpu = cpu;  in pkg_temp_thermal_device_add()
343 	zonedev->tzone = thermal_zone_device_register_with_trips("x86_pkg_temp",  in pkg_temp_thermal_device_add()
346 	if (IS_ERR(zonedev->tzone)) {  in pkg_temp_thermal_device_add()
347 		err = PTR_ERR(zonedev->tzone);  in pkg_temp_thermal_device_add()
350 	err = thermal_zone_device_enable(zonedev->tzone);  in pkg_temp_thermal_device_add()
354 	/* Store MSR value for package thermal interrupt, to restore at exit */  in pkg_temp_thermal_device_add()
355 	rdmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, zonedev->msr_pkg_therm_low,  in pkg_temp_thermal_device_add()
356 	      zonedev->msr_pkg_therm_high);  in pkg_temp_thermal_device_add()
358 	cpumask_set_cpu(cpu, &zonedev->cpumask);  in pkg_temp_thermal_device_add()
360 	zones[id] = zonedev;  in pkg_temp_thermal_device_add()
366 	thermal_zone_device_unregister(zonedev->tzone);  in pkg_temp_thermal_device_add()
381 	target = cpumask_any_but(&zonedev->cpumask, cpu);  in pkg_thermal_cpu_offline()
382 	cpumask_clear_cpu(cpu, &zonedev->cpumask);  in pkg_thermal_cpu_offline()
389 		struct thermal_zone_device *tzone = zonedev->tzone;  in pkg_thermal_cpu_offline()
398 		zonedev->tzone = NULL;  in pkg_thermal_cpu_offline()
412 	was_target = zonedev->cpu == cpu;  in pkg_thermal_cpu_offline()
413 	zonedev->cpu = target;  in pkg_thermal_cpu_offline()
422 		zones[topology_logical_die_id(cpu)] = NULL;  in pkg_thermal_cpu_offline()
425 		      zonedev->msr_pkg_therm_low, zonedev->msr_pkg_therm_high);  in pkg_thermal_cpu_offline()
432 	if (zonedev->work_scheduled && was_target) {  in pkg_thermal_cpu_offline()
438 		cancel_delayed_work_sync(&zonedev->work);  in pkg_thermal_cpu_offline()
446 		if (!lastcpu && zonedev->work_scheduled)  in pkg_thermal_cpu_offline()
447 			pkg_thermal_schedule_work(target, &zonedev->work);  in pkg_thermal_cpu_offline()
466 		return -ENODEV;  in pkg_thermal_cpu_online()
470 		cpumask_set_cpu(cpu, &zonedev->cpumask);  in pkg_thermal_cpu_online()
487 		return -ENODEV;  in pkg_temp_thermal_init()
490 	zones = kcalloc(max_id, sizeof(struct zone_device *),  in pkg_temp_thermal_init()
492 	if (!zones)  in pkg_temp_thermal_init()
493 		return -ENOMEM;  in pkg_temp_thermal_init()
495 	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "thermal/x86_pkg:online",  in pkg_temp_thermal_init()
511 	kfree(zones);  in pkg_temp_thermal_init()
523 	kfree(zones);  in module_init()
528 MODULE_DESCRIPTION("X86 PKG TEMP Thermal Driver");