diff options
| -rw-r--r-- | Documentation/hwmon/pkgtemp | 36 | ||||
| -rw-r--r-- | drivers/hwmon/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwmon/pkgtemp.c | 444 |
4 files changed, 0 insertions, 488 deletions
diff --git a/Documentation/hwmon/pkgtemp b/Documentation/hwmon/pkgtemp deleted file mode 100644 index c8e1fb0fadd3..000000000000 --- a/Documentation/hwmon/pkgtemp +++ /dev/null @@ -1,36 +0,0 @@ -Kernel driver pkgtemp -====================== - -Supported chips: - * Intel family - Prefix: 'pkgtemp' - CPUID: - Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual - Volume 3A: System Programming Guide - -Author: Fenghua Yu - -Description ------------ - -This driver permits reading package level temperature sensor embedded inside -Intel CPU package. The sensors can be in core, uncore, memory controller, or -other components in a package. The feature is first implemented in Intel Sandy -Bridge platform. - -Temperature is measured in degrees Celsius and measurement resolution is -1 degree C. Valid temperatures are from 0 to TjMax degrees C, because the actual -value of temperature register is in fact a delta from TjMax. - -Temperature known as TjMax is the maximum junction temperature of package. -We get this from MSR_IA32_TEMPERATURE_TARGET. If the MSR is not accessible, -we define TjMax as 100 degrees Celsius. At this temperature, protection -mechanism will perform actions to forcibly cool down the package. Alarm -may be raised, if the temperature grows enough (more than TjMax) to trigger -the Out-Of-Spec bit. Following table summarizes the exported sysfs files: - -temp1_input - Package temperature (in millidegrees Celsius). -temp1_max - All cooling devices should be turned on. -temp1_crit - Maximum junction temperature (in millidegrees Celsius). -temp1_crit_alarm - Set when Out-of-spec bit is set, never clears. - Correct CPU operation is no longer guaranteed. diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 4abd3735a76e..43221beb9e97 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -408,13 +408,6 @@ config SENSORS_CORETEMP sensor inside your CPU. Most of the family 6 CPUs are supported. Check Documentation/hwmon/coretemp for details. -config SENSORS_PKGTEMP - tristate "Intel processor package temperature sensor" - depends on X86 && EXPERIMENTAL - help - If you say yes here you get support for the package level temperature - sensor inside your CPU. Check documentation/driver for details. - config SENSORS_IBMAEM tristate "IBM Active Energy Manager temperature/power sensors and control" select IPMI_SI diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 21c9b17abad5..28e8d52f6379 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -40,7 +40,6 @@ obj-$(CONFIG_SENSORS_APPLESMC) += applesmc.o obj-$(CONFIG_SENSORS_ASC7621) += asc7621.o obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o obj-$(CONFIG_SENSORS_CORETEMP) += coretemp.o -obj-$(CONFIG_SENSORS_PKGTEMP) += pkgtemp.o obj-$(CONFIG_SENSORS_DME1737) += dme1737.o obj-$(CONFIG_SENSORS_DS620) += ds620.o obj-$(CONFIG_SENSORS_DS1621) += ds1621.o diff --git a/drivers/hwmon/pkgtemp.c b/drivers/hwmon/pkgtemp.c deleted file mode 100644 index 21c817d98123..000000000000 --- a/drivers/hwmon/pkgtemp.c +++ /dev/null @@ -1,444 +0,0 @@ -/* - * pkgtemp.c - Linux kernel module for processor package hardware monitoring - * - * Copyright (C) 2010 Fenghua Yu <fenghua.yu@intel.com> - * - * Inspired from many hwmon drivers especially coretemp. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301 USA. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/jiffies.h> -#include <linux/hwmon.h> -#include <linux/sysfs.h> -#include <linux/hwmon-sysfs.h> -#include <linux/err.h> -#include <linux/mutex.h> -#include <linux/list.h> -#include <linux/platform_device.h> -#include <linux/cpu.h> -#include <asm/msr.h> -#include <asm/processor.h> -#include <asm/smp.h> - -#define DRVNAME "pkgtemp" - -enum { SHOW_TEMP, SHOW_TJMAX, SHOW_TTARGET, SHOW_LABEL, SHOW_NAME }; - -/* - * Functions declaration - */ - -static struct pkgtemp_data *pkgtemp_update_device(struct device *dev); - -struct pkgtemp_data { - struct device *hwmon_dev; - struct mutex update_lock; - const char *name; - u32 id; - u16 phys_proc_id; - char valid; /* zero until following fields are valid */ - unsigned long last_updated; /* in jiffies */ - int temp; - int tjmax; - int ttarget; - u8 alarm; -}; - -/* - * Sysfs stuff - */ - -static ssize_t show_name(struct device *dev, struct device_attribute - *devattr, char *buf) -{ - int ret; - struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); - struct pkgtemp_data *data = dev_get_drvdata(dev); - - if (attr->index == SHOW_NAME) - ret = sprintf(buf, "%s\n", data->name); - else /* show label */ - ret = sprintf(buf, "physical id %d\n", - data->phys_proc_id); - return ret; -} - -static ssize_t show_alarm(struct device *dev, struct device_attribute - *devattr, char *buf) -{ - struct pkgtemp_data *data = pkgtemp_update_device(dev); - /* read the Out-of-spec log, never clear */ - return sprintf(buf, "%d\n", data->alarm); -} - -static ssize_t show_temp(struct device *dev, - struct device_attribute *devattr, char *buf) -{ - struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); - struct pkgtemp_data *data = pkgtemp_update_device(dev); - int err = 0; - - if (attr->index == SHOW_TEMP) - err = data->valid ? sprintf(buf, "%d\n", data->temp) : -EAGAIN; - else if (attr->index == SHOW_TJMAX) - err = sprintf(buf, "%d\n", data->tjmax); - else - err = sprintf(buf, "%d\n", data->ttarget); - return err; -} - -static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, SHOW_TEMP); -static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp, NULL, SHOW_TJMAX); -static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, SHOW_TTARGET); -static DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL); -static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_name, NULL, SHOW_LABEL); -static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, SHOW_NAME); - -static struct attribute *pkgtemp_attributes[] = { - &sensor_dev_attr_name.dev_attr.attr, - &sensor_dev_attr_temp1_label.dev_attr.attr, - &dev_attr_temp1_crit_alarm.attr, - &sensor_dev_attr_temp1_input.dev_attr.attr, - &sensor_dev_attr_temp1_crit.dev_attr.attr, - NULL -}; - -static const struct attribute_group pkgtemp_group = { - .attrs = pkgtemp_attributes, -}; - -static struct pkgtemp_data *pkgtemp_update_device(struct device *dev) -{ - struct pkgtemp_data *data = dev_get_drvdata(dev); - unsigned int cpu; - int err; - - mutex_lock(&data->update_lock); - - if (!data->valid || time_after(jiffies, data->last_updated + HZ)) { - u32 eax, edx; - - data->valid = 0; - cpu = data->id; - err = rdmsr_on_cpu(cpu, MSR_IA32_PACKAGE_THERM_STATUS, - &eax, &edx); - if (!err) { - data->alarm = (eax >> 5) & 1; - data->temp = data->tjmax - (((eax >> 16) - & 0x7f) * 1000); - data->valid = 1; - } else - dev_dbg(dev, "Temperature data invalid (0x%x)\n", eax); - - data->last_updated = jiffies; - } - - mutex_unlock(&data->update_lock); - return data; -} - -static int get_tjmax(int cpu, struct device *dev) -{ - int default_tjmax = 100000; - int err; - u32 eax, edx; - u32 val; - - /* IA32_TEMPERATURE_TARGET contains the TjMax value */ - err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, &eax, &edx); - if (!err) { - val = (eax >> 16) & 0xff; - if ((val > 80) && (val < 120)) { - dev_info(dev, "TjMax is %d C.\n", val); - return val * 1000; - } - } - dev_warn(dev, "Unable to read TjMax from CPU.\n"); - return default_tjmax; -} - -static int __devinit pkgtemp_probe(struct platform_device *pdev) -{ - struct pkgtemp_data *data; - int err; - u32 eax, edx; -#ifdef CONFIG_SMP - struct cpuinfo_x86 *c = &cpu_data(pdev->id); -#endif - - data = kzalloc(sizeof(struct pkgtemp_data), GFP_KERNEL); - if (!data) { - err = -ENOMEM; - dev_err(&pdev->dev, "Out of memory\n"); - goto exit; - } - - data->id = pdev->id; -#ifdef CONFIG_SMP - data->phys_proc_id = c->phys_proc_id; -#endif - data->name = "pkgtemp"; - mutex_init(&data->update_lock); - - /* test if we can access the THERM_STATUS MSR */ - err = rdmsr_safe_on_cpu(data->id, MSR_IA32_PACKAGE_THERM_STATUS, - &eax, &edx); - if (err) { - dev_err(&pdev->dev, - "Unable to access THERM_STATUS MSR, giving up\n"); - goto exit_free; - } - - data->tjmax = get_tjmax(data->id, &pdev->dev); - platform_set_drvdata(pdev, data); - - err = rdmsr_safe_on_cpu(data->id, MSR_IA32_TEMPERATURE_TARGET, - &eax, &edx); - if (err) { - dev_warn(&pdev->dev, "Unable to read" - " IA32_TEMPERATURE_TARGET MSR\n"); - } else { - data->ttarget = data->tjmax - (((eax >> 8) & 0xff) * 1000); - err = device_create_file(&pdev->dev, - &sensor_dev_attr_temp1_max.dev_attr); - if (err) - goto exit_free; - } - - err = sysfs_create_group(&pdev->dev.kobj, &pkgtemp_group); - if (err) - goto exit_dev; - - data->hwmon_dev = hwmon_device_register(&pdev->dev); - if (IS_ERR(data->hwmon_dev)) { - err = PTR_ERR(data->hwmon_dev); - dev_err(&pdev->dev, "Class registration failed (%d)\n", - err); - goto exit_class; - } - - return 0; - -exit_class: - sysfs_remove_group(&pdev->dev.kobj, &pkgtemp_group); -exit_dev: - device_remove_file(&pdev->dev, &sensor_dev_attr_temp1_max.dev_attr); -exit_free: - kfree(data); -exit: - return err; -} - -static int __devexit pkgtemp_remove(struct platform_device *pdev) -{ - struct pkgtemp_data *data = platform_get_drvdata(pdev); - - hwmon_device_unregister(data->hwmon_dev); - sysfs_remove_group(&pdev->dev.kobj, &pkgtemp_group); - device_remove_file(&pdev->dev, &sensor_dev_attr_temp1_max.dev_attr); - platform_set_drvdata(pdev, NULL); - kfree(data); - return 0; -} - -static struct platform_driver pkgtemp_driver = { - .driver = { - .owner = THIS_MODULE, - .name = DRVNAME, - }, - .probe = pkgtemp_probe, - .remove = __devexit_p(pkgtemp_remove), -}; - -struct pdev_entry { - struct list_head list; - struct platform_device *pdev; - unsigned int cpu; -#ifdef CONFIG_SMP - u16 phys_proc_id; -#endif -}; - -static LIST_HEAD(pdev_list); -static DEFINE_MUTEX(pdev_list_mutex); - -static int __cpuinit pkgtemp_device_add(unsigned int cpu) -{ - int err; - struct platform_device *pdev; - struct pdev_entry *pdev_entry; - struct cpuinfo_x86 *c = &cpu_data(cpu); - - if (!cpu_has(c, X86_FEATURE_PTS)) - return 0; - - mutex_lock(&pdev_list_mutex); - -#ifdef CONFIG_SMP - /* Only keep the first entry in each package */ - list_for_each_entry(pdev_entry, &pdev_list, list) { - if (c->phys_proc_id == pdev_entry->phys_proc_id) { - err = 0; /* Not an error */ - goto exit; - } - } -#endif - - pdev = platform_device_alloc(DRVNAME, cpu); - if (!pdev) { - err = -ENOMEM; - pr_err("Device allocation failed\n"); - goto exit; - } - - pdev_entry = kzalloc(sizeof(struct pdev_entry), GFP_KERNEL); - if (!pdev_entry) { - err = -ENOMEM; - goto exit_device_put; - } - - err = platform_device_add(pdev); - if (err) { - pr_err("Device addition failed (%d)\n", err); - goto exit_device_free; - } - -#ifdef CONFIG_SMP - pdev_entry->phys_proc_id = c->phys_proc_id; -#endif - pdev_entry->pdev = pdev; - pdev_entry->cpu = cpu; - list_add_tail(&pdev_entry->list, &pdev_list); - mutex_unlock(&pdev_list_mutex); - - return 0; - -exit_device_free: - kfree(pdev_entry); -exit_device_put: - platform_device_put(pdev); -exit: - mutex_unlock(&pdev_list_mutex); - return err; -} - -static void __cpuinit pkgtemp_device_remove(unsigned int cpu) -{ - struct pdev_entry *p; - unsigned int i; - int err; - - mutex_lock(&pdev_list_mutex); - list_for_each_entry(p, &pdev_list, list) { - if (p->cpu != cpu) - continue; - - platform_device_unregister(p->pdev); - list_del(&p->list); - mutex_unlock(&pdev_list_mutex); - kfree(p); - for_each_cpu(i, cpu_core_mask(cpu)) { - if (i != cpu) { - err = pkgtemp_device_add(i); - if (!err) - break; - } - } - return; - } - mutex_unlock(&pdev_list_mutex); -} - -static int __cpuinit pkgtemp_cpu_callback(struct notifier_block *nfb, - unsigned long action, void *hcpu) -{ - unsigned int cpu = (unsigned long) hcpu; - - switch (action) { - case CPU_ONLINE: - case CPU_DOWN_FAILED: - pkgtemp_device_add(cpu); - break; - case CPU_DOWN_PREPARE: - pkgtemp_device_remove(cpu); - break; - } - return NOTIFY_OK; -} - -static struct notifier_block pkgtemp_cpu_notifier __refdata = { - .notifier_call = pkgtemp_cpu_callback, -}; - -static int __init pkgtemp_init(void) -{ - int i, err = -ENODEV; - - /* quick check if we run Intel */ - if (cpu_data(0).x86_vendor != X86_VENDOR_INTEL) - goto exit; - - err = platform_driver_register(&pkgtemp_driver); - if (err) - goto exit; - - for_each_online_cpu(i) - pkgtemp_device_add(i); - -#ifndef CONFIG_HOTPLUG_CPU - if (list_empty(&pdev_list)) { - err = -ENODEV; - goto exit_driver_unreg; - } -#endif - - register_hotcpu_notifier(&pkgtemp_cpu_notifier); - return 0; - -#ifndef CONFIG_HOTPLUG_CPU -exit_driver_unreg: - platform_driver_unregister(&pkgtemp_driver); -#endif -exit: - return err; -} - -static void __exit pkgtemp_exit(void) -{ - struct pdev_entry *p, *n; - - unregister_hotcpu_notifier(&pkgtemp_cpu_notifier); - mutex_lock(&pdev_list_mutex); - list_for_each_entry_safe(p, n, &pdev_list, list) { - platform_device_unregister(p->pdev); - list_del(&p->list); - kfree(p); - } - mutex_unlock(&pdev_list_mutex); - platform_driver_unregister(&pkgtemp_driver); -} - -MODULE_AUTHOR("Fenghua Yu <fenghua.yu@intel.com>"); -MODULE_DESCRIPTION("Intel processor package temperature monitor"); -MODULE_LICENSE("GPL"); - -module_init(pkgtemp_init) -module_exit(pkgtemp_exit) |