Merge branch 'thermal-intel'

Merge changes affecting thermal control on Intel platforms for 6.3-rc1:

 - Consolidate code accessing the Intel TCC (Thermal Control Circuitry)
   MSRs by introducing library functions for that and making the
   TCC-related code in thermal drivers use them (Zhang Rui).

 - Enhance the x86_pkg_temp_thermal driver to support dynamic tjmax
   changes (Zhang Rui).

 - Address an "unsigned expression compared with zero" warning in the
   intel_soc_dts_iosf thermal driver (Yang Li).

 - Update comments regarding two functions in the Intel Menlow thermal
   driver (Deming Wang).

 - Use sysfs_emit_at() instead of scnprintf() in the int340x thermal
   driver (ye xingchen).

 - Make the intel_pch thermal driver support the Wellsburg PCH (Tim
   Zimmermann).

 - Add trip point initialization helper functions for ACPI-defined trip
   points and modify two thermal drivers to use them (Rafael Wysocki,
   Daniel Lezcano).

 - Modify the intel_pch and processor_thermal_device_pci thermal drivers
   use generic trip point tables instead of thermal zone trip point
   callbacks (Daniel Lezcano).

 - Add production mode attribute sysfs attribute to the int340x thermal
   driver (Srinivas Pandruvada).

 - Rework dynamic trip point updates handling and locking in the int340x
   thermal driver (Rafael Wysocki).

 - Make the int340x thermal driver use a generic trip points table
   instead of thermal zone trip point callbacks (Rafael Wysocki, Daniel
   Lezcano).

* thermal-intel:
  thermal: intel: int340x: Use generic trip points table
  thermal: intel: int340x: Use zone lock for synchronization
  thermal: intel: int340x: Rework updating trip points
  thermal: ACPI: Initialize trips if temperature is out of range
  thermal: intel: processor_thermal_device_pci: Use generic trip point
  thermal: intel: int340x: Add production mode attribute
  thermal: intel: intel_pch: Use generic trip points
  thermal: ACPI: Add ACPI trip point routines
  thermal: intel: intel_pch: Add support for Wellsburg PCH
  thermal: int340x_thermal: Use sysfs_emit_at() instead of scnprintf()
  thermal: intel: menlow: Update function descriptions
  thermal: intel: Fix unsigned comparison with less than zero
  thermal/x86_pkg_temp_thermal: Add support for handling dynamic tjmax
  thermal/x86_pkg_temp_thermal: Use Intel TCC library
  thermal/intel/intel_tcc_cooling: Use Intel TCC library
  thermal/intel/intel_soc_dts_iosf: Use Intel TCC library
  thermal/int340x/processor_thermal: Use Intel TCC library
  thermal/intel: Introduce Intel TCC library

Documentation/driver-api/thermal/intel_dptf.rst

@@ -84,6 +84,9 @@ DPTF ACPI Drivers interface
 	https:/github.com/intel/thermal_daemon for decoding
 	thermal table.
 
+``production_mode`` (RO)
+	When different from zero, manufacturer locked thermal configuration
+	from further changes.
 
 ACPI Thermal Relationship table interface
 ------------------------------------------

drivers/thermal/Kconfig

@@ -76,6 +76,10 @@ config THERMAL_OF
 	  Say 'Y' here if you need to build thermal infrastructure
 	  based on device tree.
 
+config THERMAL_ACPI
+       depends on ACPI
+       bool
+
 config THERMAL_WRITABLE_TRIPS
 	bool "Enable writable trip points"
 	help

drivers/thermal/Makefile

@@ -13,6 +13,7 @@ thermal_sys-$(CONFIG_THERMAL_NETLINK)		+= thermal_netlink.o
 # interface to/from other layers providing sensors
 thermal_sys-$(CONFIG_THERMAL_HWMON)		+= thermal_hwmon.o
 thermal_sys-$(CONFIG_THERMAL_OF)		+= thermal_of.o
+thermal_sys-$(CONFIG_THERMAL_ACPI)		+= thermal_acpi.o
 
 # governors
 thermal_sys-$(CONFIG_THERMAL_GOV_FAIR_SHARE)	+= gov_fair_share.o

drivers/thermal/intel/Kconfig

@@ -12,11 +12,16 @@ config X86_THERMAL_VECTOR
 	def_bool y
 	depends on X86 && CPU_SUP_INTEL && X86_LOCAL_APIC
 
+config INTEL_TCC
+	bool
+	depends on X86
+
 config X86_PKG_TEMP_THERMAL
 	tristate "X86 package temperature thermal driver"
 	depends on X86_THERMAL_VECTOR
 	select THERMAL_GOV_USER_SPACE
 	select THERMAL_WRITABLE_TRIPS
+	select INTEL_TCC
 	default m
 	help
 	  Enable this to register CPU digital sensor for package temperature as
@@ -28,6 +33,7 @@ config INTEL_SOC_DTS_IOSF_CORE
 	tristate
 	depends on X86 && PCI
 	select IOSF_MBI
+	select INTEL_TCC
 	help
 	  This is becoming a common feature for Intel SoCs to expose the additional
 	  digital temperature sensors (DTSs) using side band interface (IOSF). This
@@ -75,6 +81,7 @@ config INTEL_BXT_PMIC_THERMAL
 config INTEL_PCH_THERMAL
 	tristate "Intel PCH Thermal Reporting Driver"
 	depends on X86 && PCI
+	select THERMAL_ACPI if ACPI
 	help
 	  Enable this to support thermal reporting on certain intel PCHs.
 	  Thermal reporting device will provide temperature reading,
@@ -83,6 +90,7 @@ config INTEL_PCH_THERMAL
 config INTEL_TCC_COOLING
 	tristate "Intel TCC offset cooling Driver"
 	depends on X86
+	select INTEL_TCC
 	help
 	  Enable this to support system cooling by adjusting the effective TCC
 	  activation temperature via the TCC Offset register, which is widely

drivers/thermal/intel/Makefile

@@ -2,6 +2,7 @@
 #
 # Makefile for various Intel thermal drivers.
 
+obj-$(CONFIG_INTEL_TCC)	+= intel_tcc.o
 obj-$(CONFIG_INTEL_POWERCLAMP)	+= intel_powerclamp.o
 obj-$(CONFIG_X86_PKG_TEMP_THERMAL)	+= x86_pkg_temp_thermal.o
 obj-$(CONFIG_INTEL_SOC_DTS_IOSF_CORE)	+= intel_soc_dts_iosf.o

drivers/thermal/intel/int340x_thermal/Kconfig

@@ -9,7 +9,9 @@ config INT340X_THERMAL
 	select THERMAL_GOV_USER_SPACE
 	select ACPI_THERMAL_REL
 	select ACPI_FAN
+	select THERMAL_ACPI
 	select INTEL_SOC_DTS_IOSF_CORE
+	select INTEL_TCC
 	select PROC_THERMAL_MMIO_RAPL if POWERCAP
 	help
 	  Newer laptops and tablets that use ACPI may have thermal sensors and

drivers/thermal/intel/int340x_thermal/int3400_thermal.c

@@ -60,6 +60,7 @@ struct int3400_thermal_priv {
 	int odvp_count;
 	int *odvp;
 	u32 os_uuid_mask;
+	int production_mode;
 	struct odvp_attr *odvp_attrs;
 };
 
@@ -130,10 +131,7 @@ static ssize_t available_uuids_show(struct device *dev,
 
 	for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; i++) {
 		if (priv->uuid_bitmap & (1 << i))
-			length += scnprintf(&buf[length],
-					    PAGE_SIZE - length,
-					    "%s\n",
-					    int3400_thermal_uuids[i]);
+			length += sysfs_emit_at(buf, length, int3400_thermal_uuids[i]);
 	}
 
 	return length;
@@ -151,10 +149,7 @@ static ssize_t current_uuid_show(struct device *dev,
 
 	for (i = 0; i <= INT3400_THERMAL_CRITICAL; i++) {
 		if (priv->os_uuid_mask & BIT(i))
-			length += scnprintf(&buf[length],
-					    PAGE_SIZE - length,
-					    "%s\n",
-					    int3400_thermal_uuids[i]);
+			length += sysfs_emit_at(buf, length, int3400_thermal_uuids[i]);
 	}
 
 	if (length)
@@ -315,6 +310,44 @@ static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv)
 	return result;
 }
 
+static ssize_t production_mode_show(struct device *dev, struct device_attribute *attr,
+				     char *buf)
+{
+	struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
+
+	return sysfs_emit(buf, "%d\n", priv->production_mode);
+}
+
+static DEVICE_ATTR_RO(production_mode);
+
+static int production_mode_init(struct int3400_thermal_priv *priv)
+{
+	unsigned long long mode;
+	acpi_status status;
+	int ret;
+
+	priv->production_mode = -1;
+
+	status = acpi_evaluate_integer(priv->adev->handle, "DCFG", NULL, &mode);
+	/* If the method is not present, this is not an error */
+	if (ACPI_FAILURE(status))
+		return 0;
+
+	ret = sysfs_create_file(&priv->pdev->dev.kobj, &dev_attr_production_mode.attr);
+	if (ret)
+		return ret;
+
+	priv->production_mode = mode;
+
+	return 0;
+}
+
+static void production_mode_exit(struct int3400_thermal_priv *priv)
+{
+	if (priv->production_mode >= 0)
+		sysfs_remove_file(&priv->pdev->dev.kobj, &dev_attr_production_mode.attr);
+}
+
 static ssize_t odvp_show(struct device *dev, struct device_attribute *attr,
 			 char *buf)
 {
@@ -610,8 +643,15 @@ static int int3400_thermal_probe(struct platform_device *pdev)
 	if (result)
 		goto free_sysfs;
 
+	result = production_mode_init(priv);
+	if (result)
+		goto free_notify;
+
 	return 0;
 
+free_notify:
+	acpi_remove_notify_handler(priv->adev->handle, ACPI_DEVICE_NOTIFY,
+				   int3400_notify);
 free_sysfs:
 	cleanup_odvp(priv);
 	if (!ZERO_OR_NULL_PTR(priv->data_vault)) {
@@ -638,6 +678,8 @@ static int int3400_thermal_remove(struct platform_device *pdev)
 {
 	struct int3400_thermal_priv *priv = platform_get_drvdata(pdev);
 
+	production_mode_exit(priv);
+
 	acpi_remove_notify_handler(
 			priv->adev->handle, ACPI_DEVICE_NOTIFY,
 			int3400_notify);

drivers/thermal/intel/int340x_thermal/int3403_thermal.c

@@ -69,7 +69,7 @@ static void int3403_notify(acpi_handle handle,
 						   THERMAL_TRIP_VIOLATED);
 		break;
 	case INT3403_PERF_TRIP_POINT_CHANGED:
-		int340x_thermal_read_trips(obj->int340x_zone);
+		int340x_thermal_update_trips(obj->int340x_zone);
 		int340x_thermal_zone_device_update(obj->int340x_zone,
 						   THERMAL_TRIP_CHANGED);
 		break;

drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c

@@ -37,73 +37,6 @@ static int int340x_thermal_get_zone_temp(struct thermal_zone_device *zone,
 	return 0;
 }
 
-static int int340x_thermal_get_trip_temp(struct thermal_zone_device *zone,
-					 int trip, int *temp)
-{
-	struct int34x_thermal_zone *d = zone->devdata;
-	int i, ret = 0;
-
-	mutex_lock(&d->trip_mutex);
-
-	if (trip < d->aux_trip_nr)
-		*temp = d->aux_trips[trip];
-	else if (trip == d->crt_trip_id)
-		*temp = d->crt_temp;
-	else if (trip == d->psv_trip_id)
-		*temp = d->psv_temp;
-	else if (trip == d->hot_trip_id)
-		*temp = d->hot_temp;
-	else {
-		for (i = 0; i < INT340X_THERMAL_MAX_ACT_TRIP_COUNT; i++) {
-			if (d->act_trips[i].valid &&
-			    d->act_trips[i].id == trip) {
-				*temp = d->act_trips[i].temp;
-				break;
-			}
-		}
-		if (i == INT340X_THERMAL_MAX_ACT_TRIP_COUNT)
-			ret = -EINVAL;
-	}
-
-	mutex_unlock(&d->trip_mutex);
-
-	return ret;
-}
-
-static int int340x_thermal_get_trip_type(struct thermal_zone_device *zone,
-					 int trip,
-					 enum thermal_trip_type *type)
-{
-	struct int34x_thermal_zone *d = zone->devdata;
-	int i, ret = 0;
-
-	mutex_lock(&d->trip_mutex);
-
-	if (trip < d->aux_trip_nr)
-		*type = THERMAL_TRIP_PASSIVE;
-	else if (trip == d->crt_trip_id)
-		*type = THERMAL_TRIP_CRITICAL;
-	else if (trip == d->hot_trip_id)
-		*type = THERMAL_TRIP_HOT;
-	else if (trip == d->psv_trip_id)
-		*type = THERMAL_TRIP_PASSIVE;
-	else {
-		for (i = 0; i < INT340X_THERMAL_MAX_ACT_TRIP_COUNT; i++) {
-			if (d->act_trips[i].valid &&
-			    d->act_trips[i].id == trip) {
-				*type = THERMAL_TRIP_ACTIVE;
-				break;
-			}
-		}
-		if (i == INT340X_THERMAL_MAX_ACT_TRIP_COUNT)
-			ret = -EINVAL;
-	}
-
-	mutex_unlock(&d->trip_mutex);
-
-	return ret;
-}
-
 static int int340x_thermal_set_trip_temp(struct thermal_zone_device *zone,
 				      int trip, int temp)
 {
@@ -117,25 +50,6 @@ static int int340x_thermal_set_trip_temp(struct thermal_zone_device *zone,
 	if (ACPI_FAILURE(status))
 		return -EIO;
 
-	d->aux_trips[trip] = temp;
-
-	return 0;
-}
-
-
-static int int340x_thermal_get_trip_hyst(struct thermal_zone_device *zone,
-		int trip, int *temp)
-{
-	struct int34x_thermal_zone *d = zone->devdata;
-	acpi_status status;
-	unsigned long long hyst;
-
-	status = acpi_evaluate_integer(d->adev->handle, "GTSH", NULL, &hyst);
-	if (ACPI_FAILURE(status))
-		*temp = 0;
-	else
-		*temp = hyst * 100;
-
 	return 0;
 }
 
@@ -146,67 +60,39 @@ static void int340x_thermal_critical(struct thermal_zone_device *zone)
 
 static struct thermal_zone_device_ops int340x_thermal_zone_ops = {
 	.get_temp       = int340x_thermal_get_zone_temp,
-	.get_trip_temp	= int340x_thermal_get_trip_temp,
-	.get_trip_type	= int340x_thermal_get_trip_type,
 	.set_trip_temp	= int340x_thermal_set_trip_temp,
-	.get_trip_hyst =  int340x_thermal_get_trip_hyst,
 	.critical	= int340x_thermal_critical,
 };
 
-static int int340x_thermal_get_trip_config(acpi_handle handle, char *name,
-				      int *temp)
+static int int340x_thermal_read_trips(struct acpi_device *zone_adev,
+				      struct thermal_trip *zone_trips,
+				      int trip_cnt)
 {
-	unsigned long long r;
-	acpi_status status;
+	int i, ret;
 
-	status = acpi_evaluate_integer(handle, name, NULL, &r);
-	if (ACPI_FAILURE(status))
-		return -EIO;
+	ret = thermal_acpi_trip_critical(zone_adev, &zone_trips[trip_cnt]);
+	if (!ret)
+		trip_cnt++;
 
-	*temp = deci_kelvin_to_millicelsius(r);
-
-	return 0;
-}
-
-int int340x_thermal_read_trips(struct int34x_thermal_zone *int34x_zone)
-{
-	int trip_cnt = int34x_zone->aux_trip_nr;
-	int i;
+	ret = thermal_acpi_trip_hot(zone_adev, &zone_trips[trip_cnt]);
+	if (!ret)
+		trip_cnt++;
 
-	mutex_lock(&int34x_zone->trip_mutex);
-
-	int34x_zone->crt_trip_id = -1;
-	if (!int340x_thermal_get_trip_config(int34x_zone->adev->handle, "_CRT",
-					     &int34x_zone->crt_temp))
-		int34x_zone->crt_trip_id = trip_cnt++;
-
-	int34x_zone->hot_trip_id = -1;
-	if (!int340x_thermal_get_trip_config(int34x_zone->adev->handle, "_HOT",
-					     &int34x_zone->hot_temp))
-		int34x_zone->hot_trip_id = trip_cnt++;
-
-	int34x_zone->psv_trip_id = -1;
-	if (!int340x_thermal_get_trip_config(int34x_zone->adev->handle, "_PSV",
-					     &int34x_zone->psv_temp))
-		int34x_zone->psv_trip_id = trip_cnt++;
+	ret = thermal_acpi_trip_passive(zone_adev, &zone_trips[trip_cnt]);
+	if (!ret)
+		trip_cnt++;
 
 	for (i = 0; i < INT340X_THERMAL_MAX_ACT_TRIP_COUNT; i++) {
-		char name[5] = { '_', 'A', 'C', '0' + i, '\0' };
 
-		if (int340x_thermal_get_trip_config(int34x_zone->adev->handle,
-					name,
-					&int34x_zone->act_trips[i].temp))
+		ret = thermal_acpi_trip_active(zone_adev, i, &zone_trips[trip_cnt]);
+		if (ret)
 			break;
 
-		int34x_zone->act_trips[i].id = trip_cnt++;
-		int34x_zone->act_trips[i].valid = true;
+		trip_cnt++;
 	}
 
-	mutex_unlock(&int34x_zone->trip_mutex);
-
 	return trip_cnt;
 }
-EXPORT_SYMBOL_GPL(int340x_thermal_read_trips);
 
 static struct thermal_zone_params int340x_thermal_params = {
 	.governor_name = "user_space",
@@ -217,18 +103,18 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 						     int (*get_temp) (struct thermal_zone_device *, int *))
 {
 	struct int34x_thermal_zone *int34x_thermal_zone;
-	acpi_status status;
-	unsigned long long trip_cnt;
+	struct thermal_trip *zone_trips;
+	unsigned long long trip_cnt = 0;
+	unsigned long long hyst;
 	int trip_mask = 0;
-	int ret;
+	acpi_status status;
+	int i, ret;
 
 	int34x_thermal_zone = kzalloc(sizeof(*int34x_thermal_zone),
 				      GFP_KERNEL);
 	if (!int34x_thermal_zone)
 		return ERR_PTR(-ENOMEM);
 
-	mutex_init(&int34x_thermal_zone->trip_mutex);
-
 	int34x_thermal_zone->adev = adev;
 
 	int34x_thermal_zone->ops = kmemdup(&int340x_thermal_zone_ops,
@@ -242,33 +128,42 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 		int34x_thermal_zone->ops->get_temp = get_temp;
 
 	status = acpi_evaluate_integer(adev->handle, "PATC", NULL, &trip_cnt);
-	if (ACPI_FAILURE(status))
-		trip_cnt = 0;
-	else {
-		int i;
-
-		int34x_thermal_zone->aux_trips =
-			kcalloc(trip_cnt,
-				sizeof(*int34x_thermal_zone->aux_trips),
-				GFP_KERNEL);
-		if (!int34x_thermal_zone->aux_trips) {
-			ret = -ENOMEM;
-			goto err_trip_alloc;
-		}
-		trip_mask = BIT(trip_cnt) - 1;
+	if (!ACPI_FAILURE(status)) {
 		int34x_thermal_zone->aux_trip_nr = trip_cnt;
-		for (i = 0; i < trip_cnt; ++i)
-			int34x_thermal_zone->aux_trips[i] = THERMAL_TEMP_INVALID;
+		trip_mask = BIT(trip_cnt) - 1;
+	}
+
+	zone_trips = kzalloc(sizeof(*zone_trips) * (trip_cnt + INT340X_THERMAL_MAX_TRIP_COUNT),
+			     GFP_KERNEL);
+	if (!zone_trips) {
+		ret = -ENOMEM;
+		goto err_trips_alloc;
 	}
 
-	trip_cnt = int340x_thermal_read_trips(int34x_thermal_zone);
+	for (i = 0; i < trip_cnt; i++) {
+		zone_trips[i].type = THERMAL_TRIP_PASSIVE;
+		zone_trips[i].temperature = THERMAL_TEMP_INVALID;
+	}
+
+	trip_cnt = int340x_thermal_read_trips(adev, zone_trips, trip_cnt);
+
+	status = acpi_evaluate_integer(adev->handle, "GTSH", NULL, &hyst);
+	if (ACPI_SUCCESS(status))
+		hyst *= 100;
+	else
+		hyst = 0;
+
+	for (i = 0; i < trip_cnt; ++i)
+		zone_trips[i].hysteresis = hyst;
+
+	int34x_thermal_zone->trips = zone_trips;
 
 	int34x_thermal_zone->lpat_table = acpi_lpat_get_conversion_table(
 								adev->handle);
 
-	int34x_thermal_zone->zone = thermal_zone_device_register(
+	int34x_thermal_zone->zone = thermal_zone_device_register_with_trips(
 						acpi_device_bid(adev),
-						trip_cnt,
+						zone_trips, trip_cnt,
 						trip_mask, int34x_thermal_zone,
 						int34x_thermal_zone->ops,
 						&int340x_thermal_params,
@@ -286,12 +181,11 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
 err_enable:
 	thermal_zone_device_unregister(int34x_thermal_zone->zone);
 err_thermal_zone:
+	kfree(int34x_thermal_zone->trips);
 	acpi_lpat_free_conversion_table(int34x_thermal_zone->lpat_table);
-	kfree(int34x_thermal_zone->aux_trips);
-err_trip_alloc:
+err_trips_alloc:
 	kfree(int34x_thermal_zone->ops);
 err_ops_alloc:
-	mutex_destroy(&int34x_thermal_zone->trip_mutex);
 	kfree(int34x_thermal_zone);
 	return ERR_PTR(ret);
 }
@@ -302,13 +196,55 @@ void int340x_thermal_zone_remove(struct int34x_thermal_zone
 {
 	thermal_zone_device_unregister(int34x_thermal_zone->zone);
 	acpi_lpat_free_conversion_table(int34x_thermal_zone->lpat_table);
-	kfree(int34x_thermal_zone->aux_trips);
+	kfree(int34x_thermal_zone->trips);
 	kfree(int34x_thermal_zone->ops);
-	mutex_destroy(&int34x_thermal_zone->trip_mutex);
 	kfree(int34x_thermal_zone);
 }
 EXPORT_SYMBOL_GPL(int340x_thermal_zone_remove);
 
+void int340x_thermal_update_trips(struct int34x_thermal_zone *int34x_zone)
+{
+	struct acpi_device *zone_adev = int34x_zone->adev;
+	struct thermal_trip *zone_trips = int34x_zone->trips;
+	int trip_cnt = int34x_zone->zone->num_trips;
+	int act_trip_nr = 0;
+	int i;
+
+	mutex_lock(&int34x_zone->zone->lock);
+
+	for (i = int34x_zone->aux_trip_nr; i < trip_cnt; i++) {
+		struct thermal_trip trip;
+		int err;
+
+		switch (zone_trips[i].type) {
+		case THERMAL_TRIP_CRITICAL:
+			err = thermal_acpi_trip_critical(zone_adev, &trip);
+			break;
+		case THERMAL_TRIP_HOT:
+			err = thermal_acpi_trip_hot(zone_adev, &trip);
+			break;
+		case THERMAL_TRIP_PASSIVE:
+			err = thermal_acpi_trip_passive(zone_adev, &trip);
+			break;
+		case THERMAL_TRIP_ACTIVE:
+			err = thermal_acpi_trip_active(zone_adev, act_trip_nr++,
+						       &trip);
+			break;
+		default:
+			err = -ENODEV;
+		}
+		if (err) {
+			zone_trips[i].temperature = THERMAL_TEMP_INVALID;
+			continue;
+		}
+
+		zone_trips[i].temperature = trip.temperature;
+	}
+
+	mutex_unlock(&int34x_zone->zone->lock);
+}
+EXPORT_SYMBOL_GPL(int340x_thermal_update_trips);
+
 MODULE_AUTHOR("Aaron Lu <aaron.lu@intel.com>");
 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
 MODULE_DESCRIPTION("Intel INT340x common thermal zone handler");

drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h

@@ -10,6 +10,7 @@
 #include <acpi/acpi_lpat.h>
 
 #define INT340X_THERMAL_MAX_ACT_TRIP_COUNT	10
+#define INT340X_THERMAL_MAX_TRIP_COUNT INT340X_THERMAL_MAX_ACT_TRIP_COUNT + 3
 
 struct active_trip {
 	int temp;
@@ -19,26 +20,18 @@ struct active_trip {
 
 struct int34x_thermal_zone {
 	struct acpi_device *adev;
-	struct active_trip act_trips[INT340X_THERMAL_MAX_ACT_TRIP_COUNT];
-	unsigned long *aux_trips;
+	struct thermal_trip *trips;
 	int aux_trip_nr;
-	int psv_temp;
-	int psv_trip_id;
-	int crt_temp;
-	int crt_trip_id;
-	int hot_temp;
-	int hot_trip_id;
 	struct thermal_zone_device *zone;
 	struct thermal_zone_device_ops *ops;
 	void *priv_data;
 	struct acpi_lpat_conversion_table *lpat_table;
-	struct mutex trip_mutex;
 };
 
 struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *,
 				int (*get_temp) (struct thermal_zone_device *, int *));
 void int340x_thermal_zone_remove(struct int34x_thermal_zone *);
-int int340x_thermal_read_trips(struct int34x_thermal_zone *int34x_zone);
+void int340x_thermal_update_trips(struct int34x_thermal_zone *int34x_zone);
 
 static inline void int340x_thermal_zone_set_priv_data(
 			struct int34x_thermal_zone *tzone, void *priv_data)

drivers/thermal/intel/int340x_thermal/processor_thermal_device.c

@@ -4,6 +4,7 @@
  * Copyright (c) 2014, Intel Corporation.
  */
 #include <linux/acpi.h>
+#include <linux/intel_tcc.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
@@ -68,54 +69,17 @@ static const struct attribute_group power_limit_attribute_group = {
 	.name = "power_limits"
 };
 
-static int tcc_get_offset(void)
-{
-	u64 val;
-	int err;
-
-	err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
-	if (err)
-		return err;
-
-	return (val >> 24) & 0x3f;
-}
-
 static ssize_t tcc_offset_degree_celsius_show(struct device *dev,
 					      struct device_attribute *attr,
 					      char *buf)
 {
-	int tcc;
-
-	tcc = tcc_get_offset();
-	if (tcc < 0)
-		return tcc;
+	int offset;
 
-	return sprintf(buf, "%d\n", tcc);
-}
-
-static int tcc_offset_update(unsigned int tcc)
-{
-	u64 val;
-	int err;
-
-	if (tcc > 63)
-		return -EINVAL;
-
-	err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
-	if (err)
-		return err;
-
-	if (val & BIT(31))
-		return -EPERM;
-
-	val &= ~GENMASK_ULL(29, 24);
-	val |= (tcc & 0x3f) << 24;
-
-	err = wrmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, val);
-	if (err)
-		return err;
+	offset = intel_tcc_get_offset(-1);
+	if (offset < 0)
+		return offset;
 
-	return 0;
+	return sprintf(buf, "%d\n", offset);
 }
 
 static ssize_t tcc_offset_degree_celsius_store(struct device *dev,
@@ -136,7 +100,7 @@ static ssize_t tcc_offset_degree_celsius_store(struct device *dev,
 	if (kstrtouint(buf, 0, &tcc))
 		return -EINVAL;
 
-	err = tcc_offset_update(tcc);
+	err = intel_tcc_set_offset(-1, tcc);
 	if (err)
 		return err;
 
@@ -145,66 +109,25 @@ static ssize_t tcc_offset_degree_celsius_store(struct device *dev,
 
 static DEVICE_ATTR_RW(tcc_offset_degree_celsius);
 
-static int stored_tjmax; /* since it is fixed, we can have local storage */
-
-static int get_tjmax(void)
-{
-	u32 eax, edx;
-	u32 val;
-	int err;
-
-	err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
-	if (err)
-		return err;
-
-	val = (eax >> 16) & 0xff;
-	if (val)
-		return val;
-
-	return -EINVAL;
-}
-
-static int read_temp_msr(int *temp)
+static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
+					 int *temp)
 {
 	int cpu;
-	u32 eax, edx;
-	int err;
-	unsigned long curr_temp_off = 0;
+	int curr_temp;
 
 	*temp = 0;
 
 	for_each_online_cpu(cpu) {
-		err = rdmsr_safe_on_cpu(cpu, MSR_IA32_THERM_STATUS, &eax,
-					&edx);
-		if (err)
-			goto err_ret;
-		else {
-			if (eax & 0x80000000) {
-				curr_temp_off = (eax >> 16) & 0x7f;
-				if (!*temp || curr_temp_off < *temp)
-					*temp = curr_temp_off;
-			} else {
-				err = -EINVAL;
-				goto err_ret;
-			}
-		}
+		curr_temp = intel_tcc_get_temp(cpu, false);
+		if (curr_temp < 0)
+			return curr_temp;
+		if (!*temp || curr_temp > *temp)
+			*temp = curr_temp;
 	}
 
-	return 0;
-err_ret:
-	return err;
-}
-
-static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
-					 int *temp)
-{
-	int ret;
-
-	ret = read_temp_msr(temp);
-	if (!ret)
-		*temp = (stored_tjmax - *temp) * 1000;
+	*temp *= 1000;
 
-	return ret;
+	return 0;
 }
 
 static int proc_thermal_read_ppcc(struct proc_thermal_device *proc_priv)
@@ -298,8 +221,7 @@ int proc_thermal_add(struct device *dev, struct proc_thermal_device *proc_priv)
 	status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp);
 	if (ACPI_FAILURE(status)) {
 		/* there is no _TMP method, add local method */
-		stored_tjmax = get_tjmax();
-		if (stored_tjmax > 0)
+		if (intel_tcc_get_tjmax(-1) > 0)
 			get_temp = proc_thermal_get_zone_temp;
 	}
 
@@ -352,7 +274,7 @@ static int tcc_offset_save = -1;
 
 int proc_thermal_suspend(struct device *dev)
 {
-	tcc_offset_save = tcc_get_offset();
+	tcc_offset_save = intel_tcc_get_offset(-1);
 	if (tcc_offset_save < 0)
 		dev_warn(dev, "failed to save offset (%d)\n", tcc_offset_save);
 
@@ -369,7 +291,7 @@ int proc_thermal_resume(struct device *dev)
 
 	/* Do not update if saving failed */
 	if (tcc_offset_save >= 0)
-		tcc_offset_update(tcc_offset_save);
+		intel_tcc_set_offset(-1, tcc_offset_save);
 
 	return 0;
 }
@@ -456,6 +378,7 @@ void proc_thermal_mmio_remove(struct pci_dev *pdev, struct proc_thermal_device *
 }
 EXPORT_SYMBOL_GPL(proc_thermal_mmio_remove);
 
+MODULE_IMPORT_NS(INTEL_TCC);
 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
 MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
 MODULE_LICENSE("GPL v2");

drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c

@@ -144,34 +144,6 @@ static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp)
 	return 0;
 }
 
-static int sys_get_trip_temp(struct thermal_zone_device *tzd,
-			     int trip, int *temp)
-{
-	struct proc_thermal_pci *pci_info = tzd->devdata;
-	u32 _temp;
-
-	proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_THRES_0, &_temp);
-	if (!_temp) {
-		*temp = THERMAL_TEMP_INVALID;
-	} else {
-		int tjmax;
-
-		proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_TJMAX, &tjmax);
-		_temp = tjmax - _temp;
-		*temp = (unsigned long)_temp * 1000;
-	}
-
-	return 0;
-}
-
-static int sys_get_trip_type(struct thermal_zone_device *tzd, int trip,
-			      enum thermal_trip_type *type)
-{
-	*type = THERMAL_TRIP_PASSIVE;
-
-	return 0;
-}
-
 static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp)
 {
 	struct proc_thermal_pci *pci_info = tzd->devdata;
@@ -200,10 +172,26 @@ static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp
 	return 0;
 }
 
+static int get_trip_temp(struct proc_thermal_pci *pci_info)
+{
+	int temp, tjmax;
+
+	proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_THRES_0, &temp);
+	if (!temp)
+		return THERMAL_TEMP_INVALID;
+
+	proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_TJMAX, &tjmax);
+	temp = (tjmax - temp) * 1000;
+
+	return temp;
+}
+
+static struct thermal_trip psv_trip = {
+	.type = THERMAL_TRIP_PASSIVE,
+};
+
 static struct thermal_zone_device_ops tzone_ops = {
 	.get_temp = sys_get_curr_temp,
-	.get_trip_temp = sys_get_trip_temp,
-	.get_trip_type = sys_get_trip_type,
 	.set_trip_temp	= sys_set_trip_temp,
 };
 
@@ -251,7 +239,10 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_
 	if (ret)
 		goto err_ret_thermal;
 
-	pci_info->tzone = thermal_zone_device_register("TCPU_PCI", 1, 1, pci_info,
+	psv_trip.temperature = get_trip_temp(pci_info);
+
+	pci_info->tzone = thermal_zone_device_register_with_trips("TCPU_PCI", &psv_trip,
+							1, 1, pci_info,
 							&tzone_ops,
 							&tzone_params, 0, 0);
 	if (IS_ERR(pci_info->tzone)) {

drivers/thermal/intel/intel_menlow.c

@@ -232,9 +232,9 @@ static DEFINE_MUTEX(intel_menlow_attr_lock);
 
 /*
  * sensor_get_auxtrip - get the current auxtrip value from sensor
- * @name: Thermalzone name
- * @auxtype : AUX0/AUX1
- * @buf: syfs buffer
+ * @handle: Object handle
+ * @index : GET_AUX1/GET_AUX0
+ * @value : The address will be fill by the value
  */
 static int sensor_get_auxtrip(acpi_handle handle, int index,
 							unsigned long long *value)
@@ -254,9 +254,9 @@ static int sensor_get_auxtrip(acpi_handle handle, int index,
 
 /*
  * sensor_set_auxtrip - set the new auxtrip value to sensor
- * @name: Thermalzone name
- * @auxtype : AUX0/AUX1
- * @buf: syfs buffer
+ * @handle: Object handle
+ * @index : GET_AUX1/GET_AUX0
+ * @value : The value will be set
  */
 static int sensor_set_auxtrip(acpi_handle handle, int index, int value)
 {

drivers/thermal/intel/intel_pch_thermal.c

@@ -29,6 +29,7 @@
 #define PCH_THERMAL_DID_CNL_LP	0x02F9 /* CNL-LP PCH */
 #define PCH_THERMAL_DID_CML_H	0X06F9 /* CML-H PCH */
 #define PCH_THERMAL_DID_LWB	0xA1B1 /* Lewisburg PCH */
+#define PCH_THERMAL_DID_WBG	0x8D24 /* Wellsburg PCH */
 
 /* Wildcat Point-LP  PCH Thermal registers */
 #define WPT_TEMP	0x0000	/* Temperature */
@@ -65,6 +66,8 @@
 #define WPT_TEMP_OFFSET	(PCH_TEMP_OFFSET * MILLIDEGREE_PER_DEGREE)
 #define GET_PCH_TEMP(x)	(((x) / 2) + PCH_TEMP_OFFSET)
 
+#define PCH_MAX_TRIPS 3 /* critical, hot, passive */
+
 /* Amount of time for each cooling delay, 100ms by default for now */
 static unsigned int delay_timeout = 100;
 module_param(delay_timeout, int, 0644);
@@ -82,12 +85,7 @@ struct pch_thermal_device {
 	const struct pch_dev_ops *ops;
 	struct pci_dev *pdev;
 	struct thermal_zone_device *tzd;
-	int crt_trip_id;
-	unsigned long crt_temp;
-	int hot_trip_id;
-	unsigned long hot_temp;
-	int psv_trip_id;
-	unsigned long psv_temp;
+	struct thermal_trip trips[PCH_MAX_TRIPS];
 	bool bios_enabled;
 };
 
@@ -102,33 +100,22 @@ static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
 				      int *nr_trips)
 {
 	struct acpi_device *adev;
-
-	ptd->psv_trip_id = -1;
+	int ret;
 
 	adev = ACPI_COMPANION(&ptd->pdev->dev);
-	if (adev) {
-		unsigned long long r;
-		acpi_status status;
-
-		status = acpi_evaluate_integer(adev->handle, "_PSV", NULL,
-					       &r);
-		if (ACPI_SUCCESS(status)) {
-			unsigned long trip_temp;
-
-			trip_temp = deci_kelvin_to_millicelsius(r);
-			if (trip_temp) {
-				ptd->psv_temp = trip_temp;
-				ptd->psv_trip_id = *nr_trips;
-				++(*nr_trips);
-			}
-		}
-	}
+	if (!adev)
+		return;
+
+	ret = thermal_acpi_trip_passive(adev, &ptd->trips[*nr_trips]);
+	if (ret || ptd->trips[*nr_trips].temperature <= 0)
+		return;
+
+	++(*nr_trips);
 }
 #else
 static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
 				      int *nr_trips)
 {
-	ptd->psv_trip_id = -1;
 
 }
 #endif
@@ -163,21 +150,19 @@ static int pch_wpt_init(struct pch_thermal_device *ptd, int *nr_trips)
 	}
 
 read_trips:
-	ptd->crt_trip_id = -1;
 	trip_temp = readw(ptd->hw_base + WPT_CTT);
 	trip_temp &= 0x1FF;
 	if (trip_temp) {
-		ptd->crt_temp = GET_WPT_TEMP(trip_temp);
-		ptd->crt_trip_id = 0;
+		ptd->trips[*nr_trips].temperature = GET_WPT_TEMP(trip_temp);
+		ptd->trips[*nr_trips].type = THERMAL_TRIP_CRITICAL;
 		++(*nr_trips);
 	}
 
-	ptd->hot_trip_id = -1;
 	trip_temp = readw(ptd->hw_base + WPT_PHL);
 	trip_temp &= 0x1FF;
 	if (trip_temp) {
-		ptd->hot_temp = GET_WPT_TEMP(trip_temp);
-		ptd->hot_trip_id = *nr_trips;
+		ptd->trips[*nr_trips].temperature = GET_WPT_TEMP(trip_temp);
+		ptd->trips[*nr_trips].type = THERMAL_TRIP_HOT;
 		++(*nr_trips);
 	}
 
@@ -298,39 +283,6 @@ static int pch_thermal_get_temp(struct thermal_zone_device *tzd, int *temp)
 	return	ptd->ops->get_temp(ptd, temp);
 }
 
-static int pch_get_trip_type(struct thermal_zone_device *tzd, int trip,
-			     enum thermal_trip_type *type)
-{
-	struct pch_thermal_device *ptd = tzd->devdata;
-
-	if (ptd->crt_trip_id == trip)
-		*type = THERMAL_TRIP_CRITICAL;
-	else if (ptd->hot_trip_id == trip)
-		*type = THERMAL_TRIP_HOT;
-	else if (ptd->psv_trip_id == trip)
-		*type = THERMAL_TRIP_PASSIVE;
-	else
-		return -EINVAL;
-
-	return 0;
-}
-
-static int pch_get_trip_temp(struct thermal_zone_device *tzd, int trip, int *temp)
-{
-	struct pch_thermal_device *ptd = tzd->devdata;
-
-	if (ptd->crt_trip_id == trip)
-		*temp = ptd->crt_temp;
-	else if (ptd->hot_trip_id == trip)
-		*temp = ptd->hot_temp;
-	else if (ptd->psv_trip_id == trip)
-		*temp = ptd->psv_temp;
-	else
-		return -EINVAL;
-
-	return 0;
-}
-
 static void pch_critical(struct thermal_zone_device *tzd)
 {
 	dev_dbg(&tzd->device, "%s: critical temperature reached\n", tzd->type);
@@ -338,8 +290,6 @@ static void pch_critical(struct thermal_zone_device *tzd)
 
 static struct thermal_zone_device_ops tzd_ops = {
 	.get_temp = pch_thermal_get_temp,
-	.get_trip_type = pch_get_trip_type,
-	.get_trip_temp = pch_get_trip_temp,
 	.critical = pch_critical,
 };
 
@@ -350,6 +300,7 @@ enum board_ids {
 	board_cnl,
 	board_cml,
 	board_lwb,
+	board_wbg,
 };
 
 static const struct board_info {
@@ -380,6 +331,10 @@ static const struct board_info {
 		.name = "pch_lewisburg",
 		.ops = &pch_dev_ops_wpt,
 	},
+	[board_wbg] = {
+		.name = "pch_wellsburg",
+		.ops = &pch_dev_ops_wpt,
+	},
 };
 
 static int intel_pch_thermal_probe(struct pci_dev *pdev,
@@ -423,8 +378,9 @@ static int intel_pch_thermal_probe(struct pci_dev *pdev,
 	if (err)
 		goto error_cleanup;
 
-	ptd->tzd = thermal_zone_device_register(bi->name, nr_trips, 0, ptd,
-						&tzd_ops, NULL, 0, 0);
+	ptd->tzd = thermal_zone_device_register_with_trips(bi->name, ptd->trips,
+							   nr_trips, 0, ptd,
+							   &tzd_ops, NULL, 0, 0);
 	if (IS_ERR(ptd->tzd)) {
 		dev_err(&pdev->dev, "Failed to register thermal zone %s\n",
 			bi->name);
@@ -495,6 +451,8 @@ static const struct pci_device_id intel_pch_thermal_id[] = {
 		.driver_data = board_cml, },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_LWB),
 		.driver_data = board_lwb, },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WBG),
+		.driver_data = board_wbg, },
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id);

drivers/thermal/intel/intel_soc_dts_iosf.c

@@ -7,6 +7,7 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/bitops.h>
+#include <linux/intel_tcc.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
@@ -45,32 +46,6 @@
 /* DTS0 and DTS 1 */
 #define SOC_MAX_DTS_SENSORS		2
 
-static int get_tj_max(u32 *tj_max)
-{
-	u32 eax, edx;
-	u32 val;
-	int err;
-
-	err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
-	if (err)
-		goto err_ret;
-	else {
-		val = (eax >> 16) & 0xff;
-		if (val)
-			*tj_max = val * 1000;
-		else {
-			err = -EINVAL;
-			goto err_ret;
-		}
-	}
-
-	return 0;
-err_ret:
-	*tj_max = 0;
-
-	return err;
-}
-
 static int sys_get_trip_temp(struct thermal_zone_device *tzd, int trip,
 			     int *temp)
 {
@@ -405,7 +380,7 @@ struct intel_soc_dts_sensors *intel_soc_dts_iosf_init(
 {
 	struct intel_soc_dts_sensors *sensors;
 	bool notification;
-	u32 tj_max;
+	int tj_max;
 	int ret;
 	int i;
 
@@ -415,8 +390,9 @@ struct intel_soc_dts_sensors *intel_soc_dts_iosf_init(
 	if (!trip_count || read_only_trip_count > trip_count)
 		return ERR_PTR(-EINVAL);
 
-	if (get_tj_max(&tj_max))
-		return ERR_PTR(-EINVAL);
+	tj_max = intel_tcc_get_tjmax(-1);
+	if (tj_max < 0)
+		return ERR_PTR(tj_max);
 
 	sensors = kzalloc(sizeof(*sensors), GFP_KERNEL);
 	if (!sensors)
@@ -475,4 +451,5 @@ void intel_soc_dts_iosf_exit(struct intel_soc_dts_sensors *sensors)
 }
 EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_exit);
 
+MODULE_IMPORT_NS(INTEL_TCC);
 MODULE_LICENSE("GPL v2");

drivers/thermal/intel/intel_tcc.c

+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * intel_tcc.c - Library for Intel TCC (thermal control circuitry) MSR access
+ * Copyright (c) 2022, Intel Corporation.
+ */
+
+#include <linux/errno.h>
+#include <linux/intel_tcc.h>
+#include <asm/msr.h>
+
+/**
+ * intel_tcc_get_tjmax() - returns the default TCC activation Temperature
+ * @cpu: cpu that the MSR should be run on, nagative value means any cpu.
+ *
+ * Get the TjMax value, which is the default thermal throttling or TCC
+ * activation temperature in degrees C.
+ *
+ * Return: Tjmax value in degrees C on success, negative error code otherwise.
+ */
+int intel_tcc_get_tjmax(int cpu)
+{
+	u32 low, high;
+	int val, err;
+
+	if (cpu < 0)
+		err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &low, &high);
+	else
+		err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, &low, &high);
+	if (err)
+		return err;
+
+	val = (low >> 16) & 0xff;
+
+	return val ? val : -ENODATA;
+}
+EXPORT_SYMBOL_NS_GPL(intel_tcc_get_tjmax, INTEL_TCC);
+
+/**
+ * intel_tcc_get_offset() - returns the TCC Offset value to Tjmax
+ * @cpu: cpu that the MSR should be run on, nagative value means any cpu.
+ *
+ * Get the TCC offset value to Tjmax. The effective thermal throttling or TCC
+ * activation temperature equals "Tjmax" - "TCC Offset", in degrees C.
+ *
+ * Return: Tcc offset value in degrees C on success, negative error code otherwise.
+ */
+int intel_tcc_get_offset(int cpu)
+{
+	u32 low, high;
+	int err;
+
+	if (cpu < 0)
+		err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &low, &high);
+	else
+		err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, &low, &high);
+	if (err)
+		return err;
+
+	return (low >> 24) & 0x3f;
+}
+EXPORT_SYMBOL_NS_GPL(intel_tcc_get_offset, INTEL_TCC);
+
+/**
+ * intel_tcc_set_offset() - set the TCC offset value to Tjmax
+ * @cpu: cpu that the MSR should be run on, nagative value means any cpu.
+ * @offset: TCC offset value in degree C
+ *
+ * Set the TCC Offset value to Tjmax. The effective thermal throttling or TCC
+ * activation temperature equals "Tjmax" - "TCC Offset", in degree C.
+ *
+ * Return: On success returns 0, negative error code otherwise.
+ */
+
+int intel_tcc_set_offset(int cpu, int offset)
+{
+	u32 low, high;
+	int err;
+
+	if (offset < 0 || offset > 0x3f)
+		return -EINVAL;
+
+	if (cpu < 0)
+		err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &low, &high);
+	else
+		err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, &low, &high);
+	if (err)
+		return err;
+
+	/* MSR Locked */
+	if (low & BIT(31))
+		return -EPERM;
+
+	low &= ~(0x3f << 24);
+	low |= offset << 24;
+
+	if (cpu < 0)
+		return wrmsr_safe(MSR_IA32_TEMPERATURE_TARGET, low, high);
+	else
+		return wrmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, low, high);
+}
+EXPORT_SYMBOL_NS_GPL(intel_tcc_set_offset, INTEL_TCC);
+
+/**
+ * intel_tcc_get_temp() - returns the current temperature
+ * @cpu: cpu that the MSR should be run on, nagative value means any cpu.
+ * @pkg: true: Package Thermal Sensor. false: Core Thermal Sensor.
+ *
+ * Get the current temperature returned by the CPU core/package level
+ * thermal sensor, in degrees C.
+ *
+ * Return: Temperature in degrees C on success, negative error code otherwise.
+ */
+int intel_tcc_get_temp(int cpu, bool pkg)
+{
+	u32 low, high;
+	u32 msr = pkg ? MSR_IA32_PACKAGE_THERM_STATUS : MSR_IA32_THERM_STATUS;
+	int tjmax, temp, err;
+
+	tjmax = intel_tcc_get_tjmax(cpu);
+	if (tjmax < 0)
+		return tjmax;
+
+	if (cpu < 0)
+		err = rdmsr_safe(msr, &low, &high);
+	else
+		err = rdmsr_safe_on_cpu(cpu, msr, &low, &high);
+	if (err)
+		return err;
+
+	/* Temperature is beyond the valid thermal sensor range */
+	if (!(low & BIT(31)))
+		return -ENODATA;
+
+	temp = tjmax - ((low >> 16) & 0x7f);
+
+	/* Do not allow negative CPU temperature */
+	return temp >= 0 ? temp : -ENODATA;
+}
+EXPORT_SYMBOL_NS_GPL(intel_tcc_get_temp, INTEL_TCC);

drivers/thermal/intel/intel_tcc_cooling.c

@@ -7,12 +7,11 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/device.h>
+#include <linux/intel_tcc.h>
 #include <linux/module.h>
 #include <linux/thermal.h>
 #include <asm/cpu_device_id.h>
 
-#define TCC_SHIFT 24
-#define TCC_MASK	(0x3fULL<<24)
 #define TCC_PROGRAMMABLE	BIT(30)
 #define TCC_LOCKED		BIT(31)
 
@@ -21,47 +20,26 @@ static struct thermal_cooling_device *tcc_cdev;
 static int tcc_get_max_state(struct thermal_cooling_device *cdev, unsigned long
 			     *state)
 {
-	*state = TCC_MASK >> TCC_SHIFT;
-	return 0;
-}
-
-static int tcc_offset_update(int tcc)
-{
-	u64 val;
-	int err;
-
-	err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
-	if (err)
-		return err;
-
-	val &= ~TCC_MASK;
-	val |= tcc << TCC_SHIFT;
-
-	err = wrmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, val);
-	if (err)
-		return err;
-
+	*state = 0x3f;
 	return 0;
 }
 
 static int tcc_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
 			     *state)
 {
-	u64 val;
-	int err;
+	int offset = intel_tcc_get_offset(-1);
 
-	err = rdmsrl_safe(MSR_IA32_TEMPERATURE_TARGET, &val);
-	if (err)
-		return err;
+	if (offset < 0)
+		return offset;
 
-	*state = (val & TCC_MASK) >> TCC_SHIFT;
+	*state = offset;
 	return 0;
 }
 
 static int tcc_set_cur_state(struct thermal_cooling_device *cdev, unsigned long
 			     state)
 {
-	return tcc_offset_update(state);
+	return intel_tcc_set_offset(-1, (int)state);
 }
 
 static const struct thermal_cooling_device_ops tcc_cooling_ops = {
@@ -140,6 +118,7 @@ static void __exit tcc_cooling_exit(void)
 
 module_exit(tcc_cooling_exit)
 
+MODULE_IMPORT_NS(INTEL_TCC);
 MODULE_DESCRIPTION("TCC offset cooling device Driver");
 MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
 MODULE_LICENSE("GPL v2");

drivers/thermal/intel/x86_pkg_temp_thermal.c

@@ -7,6 +7,7 @@
 
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/intel_tcc.h>
 #include <linux/err.h>
 #include <linux/param.h>
 #include <linux/device.h>
@@ -48,7 +49,6 @@ MODULE_PARM_DESC(notify_delay_ms,
 struct zone_device {
 	int				cpu;
 	bool				work_scheduled;
-	u32				tj_max;
 	u32				msr_pkg_therm_low;
 	u32				msr_pkg_therm_high;
 	struct delayed_work		work;
@@ -105,38 +105,18 @@ static struct zone_device *pkg_temp_thermal_get_dev(unsigned int cpu)
 	return NULL;
 }
 
-/*
-* tj-max is interesting because threshold is set relative to this
-* temperature.
-*/
-static int get_tj_max(int cpu, u32 *tj_max)
-{
-	u32 eax, edx, val;
-	int err;
-
-	err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
-	if (err)
-		return err;
-
-	val = (eax >> 16) & 0xff;
-	*tj_max = val * 1000;
-
-	return val ? 0 : -EINVAL;
-}
-
 static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp)
 {
 	struct zone_device *zonedev = tzd->devdata;
-	u32 eax, edx;
+	int val;
 
-	rdmsr_on_cpu(zonedev->cpu, MSR_IA32_PACKAGE_THERM_STATUS,
-			&eax, &edx);
-	if (eax & 0x80000000) {
-		*temp = zonedev->tj_max - ((eax >> 16) & 0x7f) * 1000;
-		pr_debug("sys_get_curr_temp %d\n", *temp);
-		return 0;
-	}
-	return -EINVAL;
+	val = intel_tcc_get_temp(zonedev->cpu, true);
+	if (val < 0)
+		return val;
+
+	*temp = val * 1000;
+	pr_debug("sys_get_curr_temp %d\n", *temp);
+	return 0;
 }
 
 static int
@@ -144,9 +124,14 @@ sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp)
 {
 	struct zone_device *zonedev = tzd->devdata;
 	u32 l, h, mask, shift, intr;
-	int ret;
+	int tj_max, ret;
 
-	if (trip >= MAX_NUMBER_OF_TRIPS || temp >= zonedev->tj_max)
+	tj_max = intel_tcc_get_tjmax(zonedev->cpu);
+	if (tj_max < 0)
+		return tj_max;
+	tj_max *= 1000;
+
+	if (trip >= MAX_NUMBER_OF_TRIPS || temp >= tj_max)
 		return -EINVAL;
 
 	ret = rdmsr_on_cpu(zonedev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT,
@@ -171,7 +156,7 @@ sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp)
 	if (!temp) {
 		l &= ~intr;
 	} else {
-		l |= (zonedev->tj_max - temp)/1000 << shift;
+		l |= (tj_max - temp)/1000 << shift;
 		l |= intr;
 	}
 
@@ -326,9 +311,10 @@ static struct thermal_trip *pkg_temp_thermal_trips_init(int cpu, int tj_max, int
 static int pkg_temp_thermal_device_add(unsigned int cpu)
 {
 	int id = topology_logical_die_id(cpu);
-	u32 tj_max, eax, ebx, ecx, edx;
+	u32 eax, ebx, ecx, edx;
 	struct zone_device *zonedev;
 	int thres_count, err;
+	int tj_max;
 
 	if (id >= max_id)
 		return -ENOMEM;
@@ -340,9 +326,9 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
 
 	thres_count = clamp_val(thres_count, 0, MAX_NUMBER_OF_TRIPS);
 
-	err = get_tj_max(cpu, &tj_max);
-	if (err)
-		return err;
+	tj_max = intel_tcc_get_tjmax(cpu);
+	if (tj_max < 0)
+		return tj_max;
 
 	zonedev = kzalloc(sizeof(*zonedev), GFP_KERNEL);
 	if (!zonedev)
@@ -356,7 +342,6 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
 
 	INIT_DELAYED_WORK(&zonedev->work, pkg_temp_thermal_threshold_work_fn);
 	zonedev->cpu = cpu;
-	zonedev->tj_max = tj_max;
 	zonedev->tzone = thermal_zone_device_register_with_trips("x86_pkg_temp",
 			zonedev->trips, thres_count,
 			(thres_count == MAX_NUMBER_OF_TRIPS) ? 0x03 : 0x01,
@@ -545,6 +530,7 @@ static void __exit pkg_temp_thermal_exit(void)
 }
 module_exit(pkg_temp_thermal_exit)
 
+MODULE_IMPORT_NS(INTEL_TCC);
 MODULE_DESCRIPTION("X86 PKG TEMP Thermal Driver");
 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
 MODULE_LICENSE("GPL v2");

drivers/thermal/thermal_acpi.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2023 Linaro Limited
+ * Copyright 2023 Intel Corporation
+ *
+ * Library routines for populating a generic thermal trip point structure
+ * with data obtained by evaluating a specific object in the ACPI Namespace.
+ */
+#include <linux/acpi.h>
+#include <linux/units.h>
+
+#include "thermal_core.h"
+
+/*
+ * Minimum temperature for full military grade is 218°K (-55°C) and
+ * max temperature is 448°K (175°C). We can consider those values as
+ * the boundaries for the [trips] temperature returned by the
+ * firmware. Any values out of these boundaries may be considered
+ * bogus and we can assume the firmware has no data to provide.
+ */
+#define TEMP_MIN_DECIK	2180
+#define TEMP_MAX_DECIK	4480
+
+static int thermal_acpi_trip_init(struct acpi_device *adev,
+				  enum thermal_trip_type type, int id,
+				  struct thermal_trip *trip)
+{
+	unsigned long long temp;
+	acpi_status status;
+	char obj_name[5];
+
+	switch (type) {
+	case THERMAL_TRIP_ACTIVE:
+		if (id < 0 || id > 9)
+			return -EINVAL;
+
+		obj_name[1] = 'A';
+		obj_name[2] = 'C';
+		obj_name[3] = '0' + id;
+		break;
+	case THERMAL_TRIP_PASSIVE:
+		obj_name[1] = 'P';
+		obj_name[2] = 'S';
+		obj_name[3] = 'V';
+		break;
+	case THERMAL_TRIP_HOT:
+		obj_name[1] = 'H';
+		obj_name[2] = 'O';
+		obj_name[3] = 'T';
+		break;
+	case THERMAL_TRIP_CRITICAL:
+		obj_name[1] = 'C';
+		obj_name[2] = 'R';
+		obj_name[3] = 'T';
+		break;
+	}
+
+	obj_name[0] = '_';
+	obj_name[4] = '\0';
+
+	status = acpi_evaluate_integer(adev->handle, obj_name, NULL, &temp);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_debug(adev->handle, "%s evaluation failed\n", obj_name);
+		return -ENODATA;
+	}
+
+	if (temp >= TEMP_MIN_DECIK && temp <= TEMP_MAX_DECIK) {
+		trip->temperature = deci_kelvin_to_millicelsius(temp);
+	} else {
+		acpi_handle_debug(adev->handle, "%s result %llu out of range\n",
+				  obj_name, temp);
+		trip->temperature = THERMAL_TEMP_INVALID;
+	}
+
+	trip->hysteresis = 0;
+	trip->type = type;
+
+	return 0;
+}
+
+/**
+ * thermal_acpi_trip_active - Get the specified active trip point
+ * @adev: Thermal zone ACPI device object to get the description from.
+ * @id: Active cooling level (0 - 9).
+ * @trip: Trip point structure to be populated on success.
+ *
+ * Evaluate the _ACx object for the thermal zone represented by @adev to obtain
+ * the temperature of the active cooling trip point corresponding to the active
+ * cooling level given by @id and initialize @trip as an active trip point using
+ * that temperature value.
+ *
+ * Return 0 on success or a negative error value on failure.
+ */
+int thermal_acpi_trip_active(struct acpi_device *adev, int id,
+			     struct thermal_trip *trip)
+{
+	return thermal_acpi_trip_init(adev, THERMAL_TRIP_ACTIVE, id, trip);
+}
+EXPORT_SYMBOL_GPL(thermal_acpi_trip_active);
+
+/**
+ * thermal_acpi_trip_passive - Get the passive trip point
+ * @adev: Thermal zone ACPI device object to get the description from.
+ * @trip: Trip point structure to be populated on success.
+ *
+ * Evaluate the _PSV object for the thermal zone represented by @adev to obtain
+ * the temperature of the passive cooling trip point and initialize @trip as a
+ * passive trip point using that temperature value.
+ *
+ * Return 0 on success or -ENODATA on failure.
+ */
+int thermal_acpi_trip_passive(struct acpi_device *adev, struct thermal_trip *trip)
+{
+	return thermal_acpi_trip_init(adev, THERMAL_TRIP_PASSIVE, INT_MAX, trip);
+}
+EXPORT_SYMBOL_GPL(thermal_acpi_trip_passive);
+
+/**
+ * thermal_acpi_trip_hot - Get the near critical trip point
+ * @adev: the ACPI device to get the description from.
+ * @trip: a &struct thermal_trip to be filled if the function succeed.
+ *
+ * Evaluate the _HOT object for the thermal zone represented by @adev to obtain
+ * the temperature of the trip point at which the system is expected to be put
+ * into the S4 sleep state and initialize @trip as a hot trip point using that
+ * temperature value.
+ *
+ * Return 0 on success or -ENODATA on failure.
+ */
+int thermal_acpi_trip_hot(struct acpi_device *adev, struct thermal_trip *trip)
+{
+	return thermal_acpi_trip_init(adev, THERMAL_TRIP_HOT, INT_MAX, trip);
+}
+EXPORT_SYMBOL_GPL(thermal_acpi_trip_hot);
+
+/**
+ * thermal_acpi_trip_critical - Get the critical trip point
+ * @adev: the ACPI device to get the description from.
+ * @trip: a &struct thermal_trip to be filled if the function succeed.
+ *
+ * Evaluate the _CRT object for the thermal zone represented by @adev to obtain
+ * the temperature of the critical cooling trip point and initialize @trip as a
+ * critical trip point using that temperature value.
+ *
+ * Return 0 on success or -ENODATA on failure.
+ */
+int thermal_acpi_trip_critical(struct acpi_device *adev, struct thermal_trip *trip)
+{
+	return thermal_acpi_trip_init(adev, THERMAL_TRIP_CRITICAL, INT_MAX, trip);
+}
+EXPORT_SYMBOL_GPL(thermal_acpi_trip_critical);

include/linux/intel_tcc.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  header for Intel TCC (thermal control circuitry) library
+ *
+ *  Copyright (C) 2022  Intel Corporation.
+ */
+
+#ifndef __INTEL_TCC_H__
+#define __INTEL_TCC_H__
+
+#include <linux/types.h>
+
+int intel_tcc_get_tjmax(int cpu);
+int intel_tcc_get_offset(int cpu);
+int intel_tcc_set_offset(int cpu, int offset);
+int intel_tcc_get_temp(int cpu, bool pkg);
+
+#endif /* __INTEL_TCC_H__ */

include/linux/thermal.h

@@ -346,6 +346,14 @@ int thermal_zone_get_num_trips(struct thermal_zone_device *tz);
 
 int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp);
 
+#ifdef CONFIG_THERMAL_ACPI
+int thermal_acpi_trip_active(struct acpi_device *adev, int id,
+			     struct thermal_trip *trip);
+int thermal_acpi_trip_passive(struct acpi_device *adev, struct thermal_trip *trip);
+int thermal_acpi_trip_hot(struct acpi_device *adev, struct thermal_trip *trip);
+int thermal_acpi_trip_critical(struct acpi_device *adev, struct thermal_trip *trip);
+#endif
+
 #ifdef CONFIG_THERMAL
 struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
 		void *, struct thermal_zone_device_ops *,