hwmon: Remove pkgtemp driver
After the merge of pkgtemp functionality into the coretemp driver, the pkgtemp driver is no longer necessary. Remove it. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Acked-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Guenter Roeck
parent
199e0de7f5
commit
5e99c2f1e0
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@ -1,36 +0,0 @@
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Kernel driver pkgtemp
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======================
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Supported chips:
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* Intel family
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Prefix: 'pkgtemp'
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CPUID:
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Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
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Volume 3A: System Programming Guide
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Author: Fenghua Yu
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Description
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-----------
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This driver permits reading package level temperature sensor embedded inside
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Intel CPU package. The sensors can be in core, uncore, memory controller, or
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other components in a package. The feature is first implemented in Intel Sandy
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Bridge platform.
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Temperature is measured in degrees Celsius and measurement resolution is
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1 degree C. Valid temperatures are from 0 to TjMax degrees C, because the actual
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value of temperature register is in fact a delta from TjMax.
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Temperature known as TjMax is the maximum junction temperature of package.
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We get this from MSR_IA32_TEMPERATURE_TARGET. If the MSR is not accessible,
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we define TjMax as 100 degrees Celsius. At this temperature, protection
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mechanism will perform actions to forcibly cool down the package. Alarm
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may be raised, if the temperature grows enough (more than TjMax) to trigger
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the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
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temp1_input - Package temperature (in millidegrees Celsius).
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temp1_max - All cooling devices should be turned on.
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temp1_crit - Maximum junction temperature (in millidegrees Celsius).
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temp1_crit_alarm - Set when Out-of-spec bit is set, never clears.
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Correct CPU operation is no longer guaranteed.
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@ -408,13 +408,6 @@ config SENSORS_CORETEMP
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sensor inside your CPU. Most of the family 6 CPUs
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are supported. Check Documentation/hwmon/coretemp for details.
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config SENSORS_PKGTEMP
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tristate "Intel processor package temperature sensor"
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depends on X86 && EXPERIMENTAL
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help
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If you say yes here you get support for the package level temperature
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sensor inside your CPU. Check documentation/driver for details.
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config SENSORS_IBMAEM
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tristate "IBM Active Energy Manager temperature/power sensors and control"
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select IPMI_SI
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@ -40,7 +40,6 @@ obj-$(CONFIG_SENSORS_APPLESMC) += applesmc.o
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obj-$(CONFIG_SENSORS_ASC7621) += asc7621.o
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obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o
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obj-$(CONFIG_SENSORS_CORETEMP) += coretemp.o
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obj-$(CONFIG_SENSORS_PKGTEMP) += pkgtemp.o
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obj-$(CONFIG_SENSORS_DME1737) += dme1737.o
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obj-$(CONFIG_SENSORS_DS620) += ds620.o
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obj-$(CONFIG_SENSORS_DS1621) += ds1621.o
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@ -1,444 +0,0 @@
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/*
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* pkgtemp.c - Linux kernel module for processor package hardware monitoring
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*
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* Copyright (C) 2010 Fenghua Yu <fenghua.yu@intel.com>
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*
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* Inspired from many hwmon drivers especially coretemp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/hwmon.h>
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#include <linux/sysfs.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/list.h>
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#include <linux/platform_device.h>
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#include <linux/cpu.h>
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#include <asm/msr.h>
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#include <asm/processor.h>
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#include <asm/smp.h>
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#define DRVNAME "pkgtemp"
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enum { SHOW_TEMP, SHOW_TJMAX, SHOW_TTARGET, SHOW_LABEL, SHOW_NAME };
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/*
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* Functions declaration
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*/
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static struct pkgtemp_data *pkgtemp_update_device(struct device *dev);
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struct pkgtemp_data {
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struct device *hwmon_dev;
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struct mutex update_lock;
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const char *name;
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u32 id;
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u16 phys_proc_id;
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char valid; /* zero until following fields are valid */
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unsigned long last_updated; /* in jiffies */
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int temp;
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int tjmax;
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int ttarget;
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u8 alarm;
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};
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/*
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* Sysfs stuff
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*/
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static ssize_t show_name(struct device *dev, struct device_attribute
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*devattr, char *buf)
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{
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int ret;
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct pkgtemp_data *data = dev_get_drvdata(dev);
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if (attr->index == SHOW_NAME)
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ret = sprintf(buf, "%s\n", data->name);
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else /* show label */
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ret = sprintf(buf, "physical id %d\n",
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data->phys_proc_id);
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return ret;
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}
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static ssize_t show_alarm(struct device *dev, struct device_attribute
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*devattr, char *buf)
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{
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struct pkgtemp_data *data = pkgtemp_update_device(dev);
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/* read the Out-of-spec log, never clear */
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return sprintf(buf, "%d\n", data->alarm);
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}
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static ssize_t show_temp(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct pkgtemp_data *data = pkgtemp_update_device(dev);
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int err = 0;
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if (attr->index == SHOW_TEMP)
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err = data->valid ? sprintf(buf, "%d\n", data->temp) : -EAGAIN;
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else if (attr->index == SHOW_TJMAX)
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err = sprintf(buf, "%d\n", data->tjmax);
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else
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err = sprintf(buf, "%d\n", data->ttarget);
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return err;
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}
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static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, SHOW_TEMP);
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static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp, NULL, SHOW_TJMAX);
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static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, SHOW_TTARGET);
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static DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL);
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static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_name, NULL, SHOW_LABEL);
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static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, SHOW_NAME);
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static struct attribute *pkgtemp_attributes[] = {
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&sensor_dev_attr_name.dev_attr.attr,
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&sensor_dev_attr_temp1_label.dev_attr.attr,
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&dev_attr_temp1_crit_alarm.attr,
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&sensor_dev_attr_temp1_input.dev_attr.attr,
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&sensor_dev_attr_temp1_crit.dev_attr.attr,
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NULL
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};
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static const struct attribute_group pkgtemp_group = {
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.attrs = pkgtemp_attributes,
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};
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static struct pkgtemp_data *pkgtemp_update_device(struct device *dev)
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{
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struct pkgtemp_data *data = dev_get_drvdata(dev);
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unsigned int cpu;
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int err;
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mutex_lock(&data->update_lock);
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if (!data->valid || time_after(jiffies, data->last_updated + HZ)) {
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u32 eax, edx;
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data->valid = 0;
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cpu = data->id;
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err = rdmsr_on_cpu(cpu, MSR_IA32_PACKAGE_THERM_STATUS,
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&eax, &edx);
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if (!err) {
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data->alarm = (eax >> 5) & 1;
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data->temp = data->tjmax - (((eax >> 16)
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& 0x7f) * 1000);
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data->valid = 1;
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} else
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dev_dbg(dev, "Temperature data invalid (0x%x)\n", eax);
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data->last_updated = jiffies;
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}
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mutex_unlock(&data->update_lock);
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return data;
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}
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static int get_tjmax(int cpu, struct device *dev)
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{
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int default_tjmax = 100000;
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int err;
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u32 eax, edx;
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u32 val;
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/* IA32_TEMPERATURE_TARGET contains the TjMax value */
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err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
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if (!err) {
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val = (eax >> 16) & 0xff;
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if ((val > 80) && (val < 120)) {
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dev_info(dev, "TjMax is %d C.\n", val);
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return val * 1000;
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}
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}
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dev_warn(dev, "Unable to read TjMax from CPU.\n");
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return default_tjmax;
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}
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static int __devinit pkgtemp_probe(struct platform_device *pdev)
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{
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struct pkgtemp_data *data;
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int err;
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u32 eax, edx;
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#ifdef CONFIG_SMP
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struct cpuinfo_x86 *c = &cpu_data(pdev->id);
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#endif
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data = kzalloc(sizeof(struct pkgtemp_data), GFP_KERNEL);
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if (!data) {
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err = -ENOMEM;
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dev_err(&pdev->dev, "Out of memory\n");
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goto exit;
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}
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data->id = pdev->id;
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#ifdef CONFIG_SMP
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data->phys_proc_id = c->phys_proc_id;
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#endif
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data->name = "pkgtemp";
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mutex_init(&data->update_lock);
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/* test if we can access the THERM_STATUS MSR */
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err = rdmsr_safe_on_cpu(data->id, MSR_IA32_PACKAGE_THERM_STATUS,
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&eax, &edx);
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if (err) {
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dev_err(&pdev->dev,
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"Unable to access THERM_STATUS MSR, giving up\n");
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goto exit_free;
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}
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data->tjmax = get_tjmax(data->id, &pdev->dev);
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platform_set_drvdata(pdev, data);
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err = rdmsr_safe_on_cpu(data->id, MSR_IA32_TEMPERATURE_TARGET,
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&eax, &edx);
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if (err) {
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dev_warn(&pdev->dev, "Unable to read"
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" IA32_TEMPERATURE_TARGET MSR\n");
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} else {
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data->ttarget = data->tjmax - (((eax >> 8) & 0xff) * 1000);
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err = device_create_file(&pdev->dev,
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&sensor_dev_attr_temp1_max.dev_attr);
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if (err)
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goto exit_free;
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}
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err = sysfs_create_group(&pdev->dev.kobj, &pkgtemp_group);
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if (err)
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goto exit_dev;
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data->hwmon_dev = hwmon_device_register(&pdev->dev);
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if (IS_ERR(data->hwmon_dev)) {
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err = PTR_ERR(data->hwmon_dev);
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dev_err(&pdev->dev, "Class registration failed (%d)\n",
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err);
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goto exit_class;
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}
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return 0;
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exit_class:
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sysfs_remove_group(&pdev->dev.kobj, &pkgtemp_group);
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exit_dev:
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device_remove_file(&pdev->dev, &sensor_dev_attr_temp1_max.dev_attr);
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exit_free:
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kfree(data);
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exit:
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return err;
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}
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static int __devexit pkgtemp_remove(struct platform_device *pdev)
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{
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struct pkgtemp_data *data = platform_get_drvdata(pdev);
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hwmon_device_unregister(data->hwmon_dev);
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sysfs_remove_group(&pdev->dev.kobj, &pkgtemp_group);
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device_remove_file(&pdev->dev, &sensor_dev_attr_temp1_max.dev_attr);
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platform_set_drvdata(pdev, NULL);
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kfree(data);
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return 0;
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}
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static struct platform_driver pkgtemp_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = DRVNAME,
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},
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.probe = pkgtemp_probe,
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.remove = __devexit_p(pkgtemp_remove),
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};
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struct pdev_entry {
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struct list_head list;
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struct platform_device *pdev;
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unsigned int cpu;
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#ifdef CONFIG_SMP
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u16 phys_proc_id;
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#endif
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};
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static LIST_HEAD(pdev_list);
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static DEFINE_MUTEX(pdev_list_mutex);
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static int __cpuinit pkgtemp_device_add(unsigned int cpu)
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{
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int err;
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struct platform_device *pdev;
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struct pdev_entry *pdev_entry;
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struct cpuinfo_x86 *c = &cpu_data(cpu);
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if (!cpu_has(c, X86_FEATURE_PTS))
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return 0;
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mutex_lock(&pdev_list_mutex);
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#ifdef CONFIG_SMP
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/* Only keep the first entry in each package */
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list_for_each_entry(pdev_entry, &pdev_list, list) {
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if (c->phys_proc_id == pdev_entry->phys_proc_id) {
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err = 0; /* Not an error */
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goto exit;
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}
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}
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#endif
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pdev = platform_device_alloc(DRVNAME, cpu);
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if (!pdev) {
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err = -ENOMEM;
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pr_err("Device allocation failed\n");
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goto exit;
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}
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pdev_entry = kzalloc(sizeof(struct pdev_entry), GFP_KERNEL);
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if (!pdev_entry) {
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err = -ENOMEM;
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goto exit_device_put;
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}
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err = platform_device_add(pdev);
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if (err) {
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pr_err("Device addition failed (%d)\n", err);
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goto exit_device_free;
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}
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#ifdef CONFIG_SMP
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pdev_entry->phys_proc_id = c->phys_proc_id;
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#endif
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pdev_entry->pdev = pdev;
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pdev_entry->cpu = cpu;
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list_add_tail(&pdev_entry->list, &pdev_list);
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mutex_unlock(&pdev_list_mutex);
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return 0;
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exit_device_free:
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kfree(pdev_entry);
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exit_device_put:
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platform_device_put(pdev);
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exit:
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mutex_unlock(&pdev_list_mutex);
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return err;
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}
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static void __cpuinit pkgtemp_device_remove(unsigned int cpu)
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{
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struct pdev_entry *p;
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unsigned int i;
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int err;
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mutex_lock(&pdev_list_mutex);
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list_for_each_entry(p, &pdev_list, list) {
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if (p->cpu != cpu)
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continue;
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platform_device_unregister(p->pdev);
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list_del(&p->list);
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mutex_unlock(&pdev_list_mutex);
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kfree(p);
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for_each_cpu(i, cpu_core_mask(cpu)) {
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if (i != cpu) {
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err = pkgtemp_device_add(i);
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if (!err)
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break;
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}
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}
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return;
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}
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mutex_unlock(&pdev_list_mutex);
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}
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static int __cpuinit pkgtemp_cpu_callback(struct notifier_block *nfb,
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unsigned long action, void *hcpu)
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{
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unsigned int cpu = (unsigned long) hcpu;
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switch (action) {
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case CPU_ONLINE:
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case CPU_DOWN_FAILED:
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pkgtemp_device_add(cpu);
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break;
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case CPU_DOWN_PREPARE:
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pkgtemp_device_remove(cpu);
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break;
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}
|
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return NOTIFY_OK;
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}
|
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|
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static struct notifier_block pkgtemp_cpu_notifier __refdata = {
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.notifier_call = pkgtemp_cpu_callback,
|
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};
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static int __init pkgtemp_init(void)
|
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{
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int i, err = -ENODEV;
|
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|
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/* quick check if we run Intel */
|
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if (cpu_data(0).x86_vendor != X86_VENDOR_INTEL)
|
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goto exit;
|
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|
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err = platform_driver_register(&pkgtemp_driver);
|
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if (err)
|
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goto exit;
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|
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for_each_online_cpu(i)
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pkgtemp_device_add(i);
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|
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#ifndef CONFIG_HOTPLUG_CPU
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if (list_empty(&pdev_list)) {
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err = -ENODEV;
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goto exit_driver_unreg;
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}
|
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#endif
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|
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register_hotcpu_notifier(&pkgtemp_cpu_notifier);
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return 0;
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|
||||
#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)
|
||||
Loading…
Reference in New Issue